/* roulang page: index */
:root {
      --primary: #0F3D2E;
      --primary-dark: #0A2F24;
      --accent: #B7F04A;
      --accent-soft: #D2FF66;
      --accent-green: #46C26B;
      --bg: #F4F7F1;
      --card: #FFFFFF;
      --text: #17211D;
      --text-muted: #6B7A70;
      --border: #D8E0D4;
      --orange: #F5A623;
      --radius-card: 14px;
      --radius-btn: 10px;
      --radius-pill: 999px;
      --shadow-card: 0 10px 30px rgba(13, 59, 46, 0.08);
      --shadow-card-hover: 0 18px 40px rgba(13, 59, 46, 0.16);
      --shadow-hero: 0 24px 60px rgba(10, 47, 36, 0.35);
      --transition: all 0.25s ease;
      --font-sans: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
      --font-num: 'Inter', 'Roboto Mono', 'SF Mono', monospace;
      --container-max: 1200px;
      --header-height: 68px;
      --section-space: 88px;
      --section-space-mobile: 52px;
      --card-padding: 24px;
      --card-padding-mobile: 18px;
      --focus-ring: 2px solid var(--accent);
    }

    *, *::before, *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
      -webkit-text-size-adjust: 100%;
      text-size-adjust: 100%;
    }

    body {
      font-family: var(--font-sans);
      font-size: 16px;
      line-height: 1.85;
      background-color: var(--bg);
      color: var(--text);
      min-height: 100vh;
      -webkit-font-smoothing: antialiased;
      -moz-osx-font-smoothing: grayscale;
    }

    img, picture, svg {
      display: block;
      max-width: 100%;
      height: auto;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: var(--transition);
    }

    a:hover {
      color: var(--accent-green);
    }

    a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible {
      outline: var(--focus-ring);
      outline-offset: 3px;
    }

    button {
      font-family: inherit;
      cursor: pointer;
      border: none;
      background: none;
    }

    input, select, textarea {
      font-family: inherit;
      font-size: inherit;
    }

    ul, ol {
      list-style: none;
    }

    h1, h2, h3, h4, h5, h6 {
      line-height: 1.3;
      font-weight: 700;
      color: var(--text);
      letter-spacing: -0.01em;
    }

    h1 {
      font-size: clamp(2rem, 4.5vw, 2.8rem);
      font-weight: 800;
      color: #fff;
    }

    h2 {
      font-size: clamp(1.6rem, 3.2vw, 2.1rem);
      font-weight: 800;
      margin-bottom: 16px;
    }

    h3 {
      font-size: clamp(1.15rem, 2.2vw, 1.35rem);
      font-weight: 700;
    }

    p {
      font-size: 16px;
      color: var(--text);
      margin-bottom: 1.1em;
    }

    .text-muted {
      color: var(--text-muted);
    }

    .font-num {
      font-family: var(--font-num);
    }

    .container {
      max-width: var(--container-max);
      margin: 0 auto;
      padding: 0 24px;
    }

    .section {
      padding: var(--section-space) 0;
      position: relative;
    }

    .section-alt {
      background-color: #EBF1E7;
    }

    .section-dark {
      background-color: var(--primary);
      color: #fff;
    }

    .section-dark h2,
    .section-dark h3,
    .section-dark p {
      color: #E6F0E8;
    }

    .section-head {
      max-width: 720px;
      margin-bottom: 40px;
    }

    .section-head .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--accent);
      color: var(--primary);
      padding: 6px 14px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 700;
      letter-spacing: 0.03em;
      margin-bottom: 16px;
    }

    .section-head .eyebrow .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--primary);
    }

    .section-head p {
      color: var(--text-muted);
      font-size: 16px;
      line-height: 1.9;
    }

    .grid {
      display: grid;
      gap: 28px;
    }

    .grid-2 {
      grid-template-columns: repeat(2, 1fr);
    }

    .grid-3 {
      grid-template-columns: repeat(3, 1fr);
    }

    .grid-4 {
      grid-template-columns: repeat(4, 1fr);
    }

    .grid-5 {
      grid-template-columns: repeat(5, 1fr);
    }

    .card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      padding: var(--card-padding);
      transition: var(--transition);
      position: relative;
      overflow: hidden;
    }

    .card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-card-hover);
      border-color: var(--accent-green);
    }

    .card-img {
      border-radius: 10px;
      margin-bottom: 18px;
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      background: #E4EDE2;
    }

    .card-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 12px;
      border-radius: var(--radius-pill);
      font-size: 12px;
      font-weight: 600;
      background: #EAF3E4;
      color: var(--primary);
      margin-bottom: 12px;
      letter-spacing: 0.02em;
    }

    .card-tag.orange {
      background: #FFF3E0;
      color: #B56A00;
    }

    .card-tag.green {
      background: #E2F5E4;
      color: #1E7A3A;
    }

    .card h3 {
      font-size: 1.15rem;
      margin-bottom: 8px;
      color: var(--text);
    }

    .card p {
      font-size: 14.5px;
      line-height: 1.85;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .card .card-meta {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 12.5px;
      color: var(--text-muted);
      margin-top: 12px;
    }

    .card .card-meta .sep {
      width: 3px;
      height: 3px;
      border-radius: 50%;
      background: var(--border);
    }

    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 24px;
      border-radius: var(--radius-btn);
      font-size: 15px;
      font-weight: 700;
      letter-spacing: 0.02em;
      transition: var(--transition);
      text-align: center;
      line-height: 1.4;
      min-height: 46px;
      cursor: pointer;
    }

    .btn-primary {
      background: var(--accent);
      color: var(--primary);
      box-shadow: 0 6px 18px rgba(183, 240, 74, 0.35);
    }

    .btn-primary:hover {
      background: var(--accent-soft);
      color: var(--primary-dark);
      box-shadow: 0 10px 26px rgba(183, 240, 74, 0.5);
      transform: translateY(-2px);
    }

    .btn-secondary {
      background: transparent;
      color: var(--primary);
      border: 2px solid var(--primary);
    }

    .btn-secondary:hover {
      background: var(--accent);
      border-color: var(--accent);
      color: var(--primary);
    }

    .btn-light {
      background: #fff;
      color: var(--primary);
      border: 2px solid rgba(15, 61, 46, 0.15);
    }

    .btn-light:hover {
      background: var(--accent);
      border-color: var(--accent);
    }

    .btn-sm {
      padding: 8px 16px;
      font-size: 13.5px;
      min-height: 38px;
    }

    .btn-lg {
      padding: 14px 30px;
      font-size: 16px;
      min-height: 54px;
    }

    .btn-block {
      width: 100%;
    }

    .btn-text {
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      border-bottom: 2px solid transparent;
      transition: var(--transition);
      padding-bottom: 2px;
    }

    .btn-text:hover {
      border-bottom-color: var(--accent-green);
      color: var(--accent-green);
    }

    .badge {
      display: inline-flex;
      align-items: center;
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      font-size: 12px;
      font-weight: 600;
      background: #F0F6EC;
      color: var(--primary);
      letter-spacing: 0.02em;
    }

    .badge-outline {
      background: transparent;
      border: 1px solid var(--border);
      color: var(--text-muted);
    }

    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
    }

    .tag-cloud .tag {
      display: inline-flex;
      align-items: center;
      padding: 6px 14px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 500;
      color: var(--text-muted);
      transition: var(--transition);
    }

    .tag-cloud .tag:hover {
      border-color: var(--accent-green);
      color: var(--primary);
      background: #F8FCF4;
    }

    /* Header & Navigation */
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--header-height);
      z-index: 50;
      background: rgba(10, 47, 36, 0.95);
      backdrop-filter: blur(10px);
      -webkit-backdrop-filter: blur(10px);
      border-bottom: 1px solid rgba(183, 240, 74, 0.12);
      box-shadow: 0 2px 16px rgba(10, 47, 36, 0.25);
    }

    .site-header .inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: var(--header-height);
      gap: 20px;
    }

    .site-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 1.3rem;
      font-weight: 800;
      color: #fff;
      letter-spacing: 0.01em;
      white-space: nowrap;
    }

    .site-logo .logo-icon {
      width: 32px;
      height: 32px;
      background: var(--accent);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-size: 16px;
      font-weight: 800;
      flex-shrink: 0;
    }

    .site-logo span {
      color: var(--accent);
    }

    .site-nav {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
    }

    .site-nav a {
      color: #E6F0E8;
      font-size: 14.5px;
      font-weight: 500;
      padding: 8px 0;
      position: relative;
      transition: var(--transition);
      letter-spacing: 0.01em;
    }

    .site-nav a::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 0;
      height: 2px;
      background: var(--accent);
      transition: var(--transition);
      border-radius: 2px;
    }

    .site-nav a:hover {
      color: var(--accent);
    }

    .site-nav a:hover::after,
    .site-nav a[aria-current="page"]::after {
      width: 100%;
    }

    .site-nav a[aria-current="page"] {
      color: var(--accent);
    }

    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      padding: 8px;
      border-radius: 8px;
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    .hamburger span {
      width: 22px;
      height: 2px;
      background: #fff;
      border-radius: 2px;
      transition: var(--transition);
    }

    .mobile-nav {
      display: none;
      position: fixed;
      top: var(--header-height);
      left: 0;
      right: 0;
      background: rgba(10, 47, 36, 0.98);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      padding: 20px 24px 28px;
      flex-direction: column;
      gap: 6px;
      z-index: 49;
      border-bottom: 1px solid rgba(183, 240, 74, 0.15);
      box-shadow: 0 20px 40px rgba(10, 47, 36, 0.4);
    }

    .mobile-nav a {
      color: #E6F0E8;
      font-size: 16px;
      padding: 12px 8px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.06);
      transition: var(--transition);
    }

    .mobile-nav a:hover,
    .mobile-nav a[aria-current="page"] {
      color: var(--accent);
    }

    .mobile-nav .btn {
      margin-top: 14px;
      width: 100%;
    }

    .mobile-nav.open {
      display: flex;
    }

    /* Hero */
    .hero {
      min-height: 88vh;
      padding-top: calc(var(--header-height) + 40px);
      padding-bottom: 60px;
      display: flex;
      align-items: center;
      position: relative;
      background-image: url('/assets/images/ea3c45a6bc7432ca.webp');
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      isolation: isolate;
    }

    .hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(10, 47, 36, 0.88) 0%, rgba(15, 61, 46, 0.72) 50%, rgba(10, 47, 36, 0.58) 100%);
      z-index: -1;
    }

    .hero .inner {
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
      width: 100%;
    }

    .hero-content {
      color: #fff;
    }

    .hero-content .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(183, 240, 74, 0.15);
      border: 1px solid rgba(183, 240, 74, 0.3);
      color: var(--accent);
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 20px;
      letter-spacing: 0.02em;
    }

    .hero-content h1 {
      color: #fff;
      margin-bottom: 20px;
      text-shadow: 0 2px 20px rgba(10, 47, 36, 0.3);
    }

    .hero-content .hero-sub {
      font-size: 17px;
      line-height: 1.9;
      color: #E6F0E8;
      max-width: 620px;
      margin-bottom: 32px;
      opacity: 0.92;
    }

    .hero-cta {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .hero-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      margin-top: 36px;
      padding-top: 24px;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
    }

    .hero-stats .stat-item {
      display: flex;
      flex-direction: column;
    }

    .hero-stats .stat-num {
      font-size: 1.6rem;
      font-weight: 800;
      color: var(--accent);
      font-family: var(--font-num);
    }

    .hero-stats .stat-label {
      font-size: 13px;
      color: #C4D8CC;
      margin-top: 2px;
    }

    .hero-visual {
      display: flex;
      flex-direction: column;
      gap: 18px;
    }

    .hero-before-after {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }

    .ba-card {
      background: rgba(255, 255, 255, 0.08);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      border: 1px solid rgba(255, 255, 255, 0.16);
      border-radius: var(--radius-card);
      padding: 20px;
      color: #fff;
      transition: var(--transition);
    }

    .ba-card.before {
      background: rgba(30, 30, 30, 0.55);
      border-color: rgba(255, 255, 255, 0.1);
    }

    .ba-card.after {
      background: rgba(183, 240, 74, 0.14);
      border-color: rgba(183, 240, 74, 0.35);
    }

    .ba-card .ba-label {
      font-size: 12px;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.06em;
      margin-bottom: 12px;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .ba-card.before .ba-label {
      color: #F5A623;
    }

    .ba-card.after .ba-label {
      color: var(--accent);
    }

    .ba-card ul {
      list-style: none;
      padding: 0;
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .ba-card ul li {
      font-size: 13.5px;
      color: #E6F0E8;
      display: flex;
      align-items: flex-start;
      gap: 8px;
      line-height: 1.6;
    }

    .ba-card ul li::before {
      content: '';
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      margin-top: 7px;
      flex-shrink: 0;
    }

    .ba-card.before ul li::before {
      background: #F5A623;
    }

    .hero-cover-img {
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-hero);
      border: 1px solid rgba(255, 255, 255, 0.1);
    }

    .hero-cover-img img {
      width: 100%;
      aspect-ratio: 16/9;
      object-fit: cover;
      display: block;
    }

    /* Buttons & components within hero */
    .hero .btn-primary {
      background: var(--accent);
      color: var(--primary);
    }

    .hero .btn-secondary {
      background: rgba(255, 255, 255, 0.08);
      border: 2px solid rgba(255, 255, 255, 0.3);
      color: #fff;
    }

    .hero .btn-secondary:hover {
      background: rgba(183, 240, 74, 0.15);
      border-color: var(--accent);
      color: var(--accent);
    }

    /* Section-specific styles */
    .pain-box {
      background: #FFF9F2;
      border-left: 4px solid var(--orange);
      padding: 18px 20px;
      border-radius: 10px;
      margin-bottom: 16px;
    }

    .pain-box p {
      margin-bottom: 6px;
      color: #5F4A2E;
    }

    .solution-card {
      background: #F7FBF3;
      border: 1px solid #DDEBDA;
      border-radius: var(--radius-card);
      padding: 22px;
      transition: var(--transition);
    }

    .solution-card:hover {
      border-color: var(--accent-green);
      box-shadow: var(--shadow-card);
    }

    .solution-card .solution-icon {
      width: 42px;
      height: 42px;
      border-radius: 10px;
      background: var(--accent);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 14px;
    }

    .step-card {
      display: flex;
      gap: 16px;
      padding: 20px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .step-card:hover {
      border-color: var(--accent-green);
      transform: translateX(4px);
    }

    .step-num {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 800;
      font-family: var(--font-num);
      flex-shrink: 0;
    }

    .step-card h3 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }

    .step-card p {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 0;
    }

    .stat-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 22px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .stat-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-3px);
    }

    .stat-card .stat-value {
      font-size: 2.6rem;
      font-weight: 800;
      color: var(--primary);
      font-family: var(--font-num);
      line-height: 1.2;
    }

    .stat-card .stat-unit {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 500;
    }

    .stat-card .stat-desc {
      font-size: 13.5px;
      color: var(--text-muted);
      margin-top: 6px;
    }

    .testimonial-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 22px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .testimonial-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-3px);
    }

    .testimonial-card .quote {
      font-size: 14.5px;
      color: #3A5548;
      line-height: 1.85;
      flex: 1;
    }

    .testimonial-card .author {
      display: flex;
      align-items: center;
      gap: 10px;
    }

    .testimonial-card .author .avatar {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 13px;
      font-weight: 700;
    }

    .testimonial-card .author .name {
      font-size: 13px;
      font-weight: 600;
      color: var(--text);
    }

    .testimonial-card .author .role {
      font-size: 12px;
      color: var(--text-muted);
    }

    .persona-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 20px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .persona-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-card-hover);
      border-color: var(--accent-green);
    }

    .persona-card .persona-icon {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: #F0F6EC;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
    }

    .persona-card h3 {
      font-size: 1.05rem;
      margin-bottom: 4px;
    }

    .persona-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 0;
    }

    .news-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 20px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .news-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--shadow-card-hover);
    }

    .news-card .news-date {
      font-size: 12.5px;
      color: var(--text-muted);
      font-family: var(--font-num);
    }

    .news-card h3 {
      font-size: 1.05rem;
      line-height: 1.45;
      margin-bottom: 4px;
    }

    .news-card .news-summary {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.75;
      flex: 1;
    }

    .news-card .btn-text {
      font-size: 13.5px;
    }

    .metric-bar {
      background: var(--primary-dark);
      border-radius: var(--radius-card);
      padding: 36px 28px;
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 28px;
      text-align: center;
      border: 1px solid rgba(183, 240, 74, 0.15);
      box-shadow: 0 16px 40px rgba(10, 47, 36, 0.3);
    }

    .metric-bar .metric-item {
      display: flex;
      flex-direction: column;
      gap: 4px;
    }

    .metric-bar .metric-num {
      font-size: 2.4rem;
      font-weight: 800;
      color: var(--accent);
      font-family: var(--font-num);
      line-height: 1.2;
    }

    .metric-bar .metric-label {
      font-size: 13.5px;
      color: #C4D8CC;
    }

    .brand-intro {
      background: #F7FBF3;
      border: 1px solid #DDEBDA;
      border-radius: var(--radius-card);
      padding: 28px 30px;
      line-height: 1.9;
    }

    .brand-intro p {
      color: #3A5548;
    }

    .download-card {
      display: flex;
      gap: 16px;
      align-items: flex-start;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 20px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .download-card:hover {
      border-color: var(--accent-green);
      transform: translateY(-3px);
      box-shadow: var(--shadow-card-hover);
    }

    .download-card .download-icon {
      width: 46px;
      height: 46px;
      border-radius: 12px;
      background: #F0F6EC;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
      flex-shrink: 0;
    }

    .download-card .download-info {
      flex: 1;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }

    .download-card .download-info h3 {
      font-size: 1rem;
      margin-bottom: 2px;
    }

    .download-card .download-info .dl-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      font-size: 12.5px;
      color: var(--text-muted);
    }

    .download-card .btn-sm {
      flex-shrink: 0;
    }

    .scene-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 24px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .scene-card:hover {
      box-shadow: var(--shadow-card-hover);
      transform: translateY(-3px);
    }

    .scene-card .scene-img {
      width: 140px;
      height: 100px;
      border-radius: 10px;
      object-fit: cover;
      flex-shrink: 0;
      background: #E4EDE2;
    }

    .scene-card h3 {
      font-size: 1.05rem;
      margin-bottom: 6px;
    }

    .scene-card p {
      font-size: 13.5px;
      color: var(--text-muted);
      line-height: 1.7;
      margin-bottom: 0;
    }

    /* FAQ */
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }

    .faq-item {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 0;
      box-shadow: var(--shadow-card);
      overflow: hidden;
      transition: var(--transition);
    }

    .faq-item:hover {
      border-color: #C4D8CC;
    }

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 18px 20px;
      cursor: pointer;
      font-weight: 700;
      font-size: 15.5px;
      color: var(--text);
      gap: 16px;
      width: 100%;
      text-align: left;
      background: transparent;
      border: none;
      transition: var(--transition);
    }

    .faq-question .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: #F0F6EC;
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
      flex-shrink: 0;
      transition: var(--transition);
    }

    .faq-item.open .faq-icon {
      background: var(--accent);
      transform: rotate(45deg);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.35s ease;
      padding: 0 20px;
    }

    .faq-item.open .faq-answer {
      max-height: 300px;
      padding: 0 20px 18px;
    }

    .faq-answer p {
      color: var(--text-muted);
      font-size: 14.5px;
      line-height: 1.9;
      margin-bottom: 0;
    }

    /* CTA section */
    .cta-section {
      background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
      border-radius: var(--radius-card);
      padding: 48px 32px;
      text-align: center;
      color: #fff;
      position: relative;
      overflow: hidden;
      border: 1px solid rgba(183, 240, 74, 0.15);
      box-shadow: 0 20px 50px rgba(10, 47, 36, 0.3);
    }

    .cta-section h2 {
      color: #fff;
      margin-bottom: 12px;
    }

    .cta-section p {
      color: #C4D8CC;
      max-width: 560px;
      margin: 0 auto 28px;
      font-size: 16px;
    }

    .cta-section .btn {
      margin: 0 6px;
    }

    .cta-section .btn-primary {
      background: var(--accent);
      color: var(--primary);
      box-shadow: 0 8px 24px rgba(183, 240, 74, 0.4);
    }

    .cta-section .btn-light {
      background: transparent;
      border-color: rgba(255, 255, 255, 0.3);
      color: #fff;
    }

    .cta-section .btn-light:hover {
      background: rgba(183, 240, 74, 0.15);
      border-color: var(--accent);
      color: var(--accent);
    }

    /* Search bar */
    .search-bar {
      display: flex;
      gap: 10px;
      max-width: 620px;
      margin: 0 auto;
    }

    .search-bar input {
      flex: 1;
      padding: 12px 18px;
      border-radius: var(--radius-btn);
      border: 1px solid var(--border);
      background: var(--card);
      font-size: 15px;
      color: var(--text);
      transition: var(--transition);
    }

    .search-bar input:focus {
      border-color: var(--accent-green);
      box-shadow: 0 0 0 3px rgba(70, 194, 107, 0.15);
      outline: none;
    }

    .search-bar .btn {
      flex-shrink: 0;
    }

    /* Category matrix */
    .category-matrix {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 16px;
    }

    .category-entry {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 18px 16px;
      text-align: center;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
    }

    .category-entry:hover {
      border-color: var(--accent-green);
      transform: translateY(-3px);
      box-shadow: var(--shadow-card-hover);
    }

    .category-entry .cat-icon {
      width: 40px;
      height: 40px;
      border-radius: 12px;
      background: #F0F6EC;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      font-weight: 700;
      color: var(--primary);
    }

    .category-entry span {
      font-size: 13.5px;
      font-weight: 600;
      color: var(--text);
    }

    /* Rank list */
    .rank-list {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .rank-item {
      display: flex;
      align-items: center;
      gap: 14px;
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 14px 18px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
    }

    .rank-item:hover {
      border-color: var(--accent-green);
      transform: translateX(4px);
    }

    .rank-item .rank-pos {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: #F0F6EC;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      font-weight: 800;
      color: var(--primary);
      font-family: var(--font-num);
      flex-shrink: 0;
    }

    .rank-item .rank-title {
      flex: 1;
      font-size: 14.5px;
      font-weight: 600;
      color: var(--text);
    }

    .rank-item .rank-tag {
      font-size: 12px;
      padding: 3px 10px;
      border-radius: var(--radius-pill);
      background: #F0F6EC;
      color: var(--text-muted);
    }

    /* Footer */
    .site-footer {
      background: var(--primary-dark);
      color: #E6F0E8;
      padding: 60px 0 28px;
      border-top: 4px solid rgba(183, 240, 74, 0.2);
    }

    .site-footer .footer-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    .site-footer .footer-brand .site-logo {
      margin-bottom: 16px;
    }

    .site-footer .footer-brand p {
      color: #A8BFAF;
      font-size: 14px;
      line-height: 1.8;
      margin-bottom: 0;
    }

    .site-footer .footer-col h4 {
      color: #fff;
      font-size: 15px;
      margin-bottom: 16px;
      font-weight: 700;
    }

    .site-footer .footer-col ul {
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .site-footer .footer-col ul a {
      color: #A8BFAF;
      font-size: 14px;
      transition: var(--transition);
    }

    .site-footer .footer-col ul a:hover {
      color: var(--accent);
      padding-left: 4px;
    }

    .site-footer .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
      font-size: 13px;
      color: #7A9385;
    }

    .site-footer .footer-bottom a {
      color: #A8BFAF;
      text-decoration: underline;
      text-underline-offset: 3px;
    }

    .site-footer .footer-bottom a:hover {
      color: var(--accent);
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .grid-4, .grid-5 {
        grid-template-columns: repeat(2, 1fr);
      }
      .category-matrix {
        grid-template-columns: repeat(3, 1fr);
      }
      .metric-bar {
        grid-template-columns: repeat(2, 1fr);
      }
      .hero .inner {
        grid-template-columns: 1fr;
        gap: 32px;
      }
      .hero {
        padding-top: calc(var(--header-height) + 24px);
      }
      .site-footer .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 768px) {
      :root {
        --section-space: 52px;
        --card-padding: 18px;
        --header-height: 60px;
      }
      h1 {
        font-size: 1.9rem;
      }
      h2 {
        font-size: 1.5rem;
      }
      body {
        font-size: 15px;
      }
      .container {
        padding: 0 16px;
      }
      .grid-2, .grid-3, .grid-4, .grid-5 {
        grid-template-columns: 1fr;
      }
      .category-matrix {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
      }
      .site-nav {
        display: none;
      }
      .hamburger {
        display: flex;
      }
      .hero {
        min-height: auto;
        padding-top: calc(var(--header-height) + 16px);
        padding-bottom: 40px;
      }
      .hero .inner {
        grid-template-columns: 1fr;
        gap: 24px;
      }
      .hero-content .hero-sub {
        font-size: 15px;
      }
      .hero-before-after {
        grid-template-columns: 1fr;
      }
      .hero-stats {
        gap: 16px;
      }
      .hero-stats .stat-num {
        font-size: 1.3rem;
      }
      .metric-bar {
        grid-template-columns: 1fr 1fr;
        padding: 24px 16px;
        gap: 16px;
      }
      .metric-bar .metric-num {
        font-size: 1.8rem;
      }
      .scene-card {
        flex-direction: column;
        align-items: flex-start;
      }
      .scene-card .scene-img {
        width: 100%;
        height: auto;
        aspect-ratio: 16/9;
      }
      .download-card {
        flex-direction: column;
        align-items: stretch;
      }
      .download-card .btn-sm {
        width: 100%;
      }
      .search-bar {
        flex-direction: column;
      }
      .search-bar .btn {
        width: 100%;
      }
      .cta-section {
        padding: 32px 20px;
      }
      .cta-section .btn {
        display: block;
        width: 100%;
        margin: 8px 0;
      }
      .site-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .site-footer .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
      .section-head {
        margin-bottom: 28px;
      }
      .card {
        padding: var(--card-padding-mobile);
      }
      .step-card {
        padding: 16px;
      }
      .hero-cta {
        flex-direction: column;
      }
      .hero-cta .btn {
        width: 100%;
      }
      .faq-question {
        font-size: 14.5px;
        padding: 16px;
      }
      .faq-answer {
        padding: 0 16px;
      }
      .faq-item.open .faq-answer {
        padding: 0 16px 16px;
      }
    }

    @media (max-width: 480px) {
      .grid-2, .grid-3, .grid-4, .grid-5 {
        grid-template-columns: 1fr;
      }
      .category-matrix {
        grid-template-columns: 1fr;
      }
      .metric-bar {
        grid-template-columns: 1fr;
        text-align: left;
      }
      .metric-bar .metric-item {
        flex-direction: row;
        align-items: baseline;
        gap: 8px;
      }
      .hero-stats {
        flex-direction: column;
        gap: 10px;
      }
      .hero-stats .stat-item {
        flex-direction: row;
        align-items: baseline;
        gap: 8px;
      }
      .btn {
        font-size: 14px;
        padding: 10px 18px;
      }
      h1 {
        font-size: 1.6rem;
      }
      h2 {
        font-size: 1.3rem;
      }
      .section {
        padding: 44px 0;
      }
      .stat-card .stat-value {
        font-size: 2rem;
      }
    }

/* roulang page: category2 */
:root {
            --primary: #0F3D2E;
            --primary-dark: #0A2F24;
            --accent: #B7F04A;
            --accent-soft: #D2FF66;
            --accent-green: #46C26B;
            --bg: #F4F7F1;
            --card: #FFFFFF;
            --text: #17211D;
            --text-muted: #6B7A70;
            --border: #D8E0D4;
            --orange: #F5A623;
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(13, 59, 46, 0.08);
            --shadow-card-hover: 0 18px 40px rgba(13, 59, 46, 0.16);
            --shadow-hero: 0 24px 60px rgba(10, 47, 36, 0.35);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-num: 'Inter', 'Roboto Mono', 'SF Mono', monospace;
            --container-max: 1200px;
            --header-height: 68px;
            --section-space: 88px;
            --section-space-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
            --focus-ring: 2px solid var(--accent);
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            background-color: var(--bg);
            color: var(--text);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            margin: 0;
            padding: 0;
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        img,
        picture,
        svg {
            display: block;
            max-width: 100%;
            height: auto;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-green);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: var(--focus-ring);
            outline-offset: 3px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul,
        ol {
            list-style: none;
        }
        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            line-height: 1.35;
            font-weight: 700;
            color: var(--text);
        }
        .text-muted {
            color: var(--text-muted);
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: 64px 0;
            position: relative;
        }
        .section-alt {
            background-color: #EBF1E7;
        }
        .section-dark {
            background-color: var(--primary);
            color: #fff;
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: #E6F0E8;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 40px;
        }
        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: 16px;
        }
        .section-head .eyebrow .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.9;
        }
        .grid {
            display: grid;
            gap: 28px;
        }
        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }
        .card-img {
            border-radius: 10px;
            margin-bottom: 18px;
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: #E4EDE2;
        }
        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: #EAF3E4;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .card-tag.orange {
            background: #FFF3E0;
            color: #B56A00;
        }
        .card-tag.green {
            background: #E2F5E4;
            color: #1E7A3A;
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card p {
            font-size: 14.5px;
            line-height: 1.85;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12.5px;
            color: var(--text-muted);
            margin-top: 12px;
        }
        .card .card-meta .sep {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--border);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.02em;
            transition: var(--transition);
            text-align: center;
            line-height: 1.4;
            min-height: 46px;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 6px 18px rgba(183, 240, 74, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-soft);
            color: var(--primary-dark);
            box-shadow: 0 10px 26px rgba(183, 240, 74, 0.5);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--accent-soft);
            border-color: var(--accent-green);
            color: var(--primary-dark);
            transform: translateY(-2px);
        }
        .btn-sm {
            padding: 8px 16px;
            min-height: 36px;
            font-size: 13px;
            border-radius: 8px;
        }

        /* Header / Navigation */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            height: var(--header-height);
            background: rgba(10, 47, 36, 0.97);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            display: flex;
            align-items: center;
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            text-decoration: none;
            white-space: nowrap;
        }
        .site-logo:hover {
            color: var(--accent);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 8px;
            font-size: 18px;
            font-weight: 800;
            font-family: var(--font-num);
        }
        .site-logo span {
            color: var(--accent);
        }
        .site-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .site-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: #E6F0E8;
            text-decoration: none;
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
            white-space: nowrap;
        }
        .site-nav a:hover {
            color: var(--accent);
            background: rgba(183, 240, 74, 0.08);
        }
        .site-nav a[aria-current="page"] {
            color: var(--accent);
            font-weight: 600;
        }
        .site-nav a[aria-current="page"]::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 9px 20px;
            background: var(--accent);
            color: var(--primary);
            border-radius: var(--radius-btn);
            font-size: 14px;
            font-weight: 700;
            text-decoration: none;
            white-space: nowrap;
            box-shadow: 0 4px 12px rgba(183, 240, 74, 0.3);
            transition: var(--transition);
        }
        .nav-cta:hover {
            background: var(--accent-soft);
            color: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(183, 240, 74, 0.5);
            transform: translateY(-1px);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: none;
            border: none;
            padding: 8px;
            cursor: pointer;
            border-radius: 8px;
        }
        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
        }
        .breadcrumb a {
            color: var(--primary);
            font-weight: 500;
        }
        .breadcrumb a:hover {
            color: var(--accent-green);
        }
        .breadcrumb .sep {
            color: var(--border);
            user-select: none;
        }
        .breadcrumb .current {
            color: var(--text-muted);
            font-weight: 500;
        }

        /* Page Header (内页标题条) */
        .page-header {
            padding: calc(var(--header-height) + 48px) 0 40px;
            background: linear-gradient(160deg, var(--primary-dark) 0%, var(--primary) 60%, #165A43 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
            min-height: 240px;
            display: flex;
            align-items: flex-end;
        }
        .page-header::before {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: rgba(183, 240, 74, 0.08);
            pointer-events: none;
        }
        .page-header::after {
            content: '';
            position: absolute;
            bottom: -40%;
            left: 20%;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(70, 194, 107, 0.1);
            pointer-events: none;
        }
        .page-header .container {
            position: relative;
            z-index: 2;
        }
        .page-header h1 {
            color: #fff;
            font-size: 2.2rem;
            font-weight: 800;
            letter-spacing: 0.01em;
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .page-header .page-desc {
            color: #D8E8DC;
            font-size: 16px;
            line-height: 1.9;
            max-width: 680px;
            margin-bottom: 0;
        }
        .page-header .breadcrumb {
            color: #B8CCC0;
            margin-bottom: 20px;
        }
        .page-header .breadcrumb a {
            color: #D8E8DC;
        }
        .page-header .breadcrumb a:hover {
            color: var(--accent);
        }
        .page-header .breadcrumb .current {
            color: #B8CCC0;
        }
        .page-header .breadcrumb .sep {
            color: #4A6B5E;
        }

        /* Timeline */
        .timeline {
            position: relative;
            padding-left: 0;
        }
        .timeline::before {
            content: '';
            position: absolute;
            left: 16px;
            top: 0;
            bottom: 0;
            width: 2px;
            background: var(--border);
            border-radius: 2px;
        }
        .timeline-item {
            position: relative;
            padding-left: 48px;
            margin-bottom: 32px;
        }
        .timeline-item:last-child {
            margin-bottom: 0;
        }
        .timeline-item::before {
            content: '';
            position: absolute;
            left: 10px;
            top: 4px;
            width: 14px;
            height: 14px;
            border-radius: 50%;
            background: var(--accent);
            box-shadow: 0 0 0 4px rgba(183, 240, 74, 0.25);
            z-index: 1;
        }
        .timeline-item.major::before {
            background: var(--orange);
            box-shadow: 0 0 0 4px rgba(245, 166, 35, 0.25);
            width: 16px;
            height: 16px;
            left: 9px;
        }
        .timeline-item .timeline-version {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 6px;
        }
        .timeline-item .version-num {
            font-family: var(--font-num);
            font-size: 1.08rem;
            font-weight: 700;
            color: var(--primary);
            background: #EAF3E4;
            padding: 4px 14px;
            border-radius: 8px;
            letter-spacing: 0.02em;
        }
        .timeline-item.major .version-num {
            background: #FFF3E0;
            color: #B56A00;
        }
        .timeline-item .version-date {
            font-size: 13px;
            color: var(--text-muted);
            font-family: var(--font-num);
        }
        .timeline-item .version-label {
            font-size: 12px;
            font-weight: 600;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            background: #E2F5E4;
            color: #1E7A3A;
        }
        .timeline-item .version-label.stable {
            background: #EAF3E4;
            color: var(--primary);
        }
        .timeline-item .version-label.beta {
            background: #FFF3E0;
            color: #B56A00;
        }
        .timeline-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 20px 24px;
            margin-top: 10px;
            transition: var(--transition);
        }
        .timeline-card:hover {
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }
        .timeline-card h4 {
            font-size: 1rem;
            margin-bottom: 8px;
            color: var(--text);
        }
        .timeline-card ul {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        .timeline-card ul li {
            position: relative;
            padding-left: 18px;
            font-size: 14px;
            line-height: 1.9;
            color: var(--text-muted);
            margin-bottom: 4px;
        }
        .timeline-card ul li::before {
            content: '';
            position: absolute;
            left: 2px;
            top: 13px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--accent-green);
        }
        .timeline-card ul li:last-child {
            margin-bottom: 0;
        }

        /* Filter Tabs */
        .filter-tabs {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }
        .filter-tab {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            background: var(--card);
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
        }
        .filter-tab:hover {
            border-color: var(--accent-green);
            color: var(--primary);
        }
        .filter-tab.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
        }
        .filter-tab .count {
            font-family: var(--font-num);
            font-size: 11px;
            background: rgba(0, 0, 0, 0.08);
            padding: 1px 6px;
            border-radius: 10px;
            font-weight: 700;
        }
        .filter-tab.active .count {
            background: rgba(255, 255, 255, 0.2);
        }

        /* Version Highlight Card */
        .highlight-card {
            background: var(--primary);
            color: #fff;
            border-radius: var(--radius-card);
            padding: 28px 32px;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }
        .highlight-card::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -20%;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(183, 240, 74, 0.1);
        }
        .highlight-card .highlight-content {
            flex: 1;
            min-width: 260px;
            position: relative;
            z-index: 2;
        }
        .highlight-card .highlight-img {
            width: 140px;
            height: 100px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
            position: relative;
            z-index: 2;
            box-shadow: var(--shadow-hero);
        }
        .highlight-card .highlight-tag {
            display: inline-block;
            background: var(--accent);
            color: var(--primary);
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 700;
            margin-bottom: 10px;
        }
        .highlight-card h3 {
            color: #fff;
            font-size: 1.25rem;
            margin-bottom: 8px;
        }
        .highlight-card p {
            color: #D8E8DC;
            font-size: 14.5px;
            line-height: 1.85;
            margin-bottom: 12px;
        }
        .highlight-card .hl-meta {
            font-size: 13px;
            color: #B8CCC0;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            font-family: var(--font-num);
        }

        /* Notice / Alert */
        .notice {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 18px 22px;
            border-radius: 12px;
            background: #FFF8E8;
            border: 1px solid #F5D59E;
            font-size: 14.5px;
            line-height: 1.9;
            color: #6B4E00;
        }
        .notice .notice-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: var(--orange);
            color: #fff;
            border-radius: 10px;
            font-weight: 800;
            font-size: 18px;
            flex-shrink: 0;
        }
        .notice strong {
            color: #B56A00;
        }
        .notice-green {
            background: #E8F8EC;
            border-color: #B5E3C0;
            color: #1E6B3A;
        }
        .notice-green .notice-icon {
            background: var(--accent-green);
        }
        .notice-green strong {
            color: #1E6B3A;
        }

        /* FAQ */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: 12px;
            overflow: hidden;
            transition: var(--transition);
        }
        .faq-item:hover {
            border-color: var(--accent-green);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 16px 20px;
            font-size: 15px;
            font-weight: 600;
            color: var(--text);
            cursor: pointer;
            background: none;
            border: none;
            width: 100%;
            text-align: left;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: #EAF3E4;
            color: var(--primary);
            border-radius: 50%;
            font-size: 16px;
            font-weight: 700;
            transition: var(--transition);
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--accent);
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 20px;
            font-size: 14.5px;
            line-height: 1.9;
            color: var(--text-muted);
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 20px 18px;
        }

        /* CTA Section */
        .cta-box {
            background: var(--primary-dark);
            border-radius: var(--radius-card);
            padding: 44px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .cta-box::before {
            content: '';
            position: absolute;
            top: -50%;
            left: 50%;
            transform: translateX(-50%);
            width: 600px;
            height: 600px;
            border-radius: 50%;
            background: rgba(183, 240, 74, 0.07);
        }
        .cta-box h2 {
            color: #fff;
            font-size: 1.6rem;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }
        .cta-box p {
            color: #D8E8DC;
            font-size: 15px;
            line-height: 1.9;
            max-width: 640px;
            margin: 0 auto 24px;
            position: relative;
            z-index: 2;
        }
        .cta-box .btn {
            position: relative;
            z-index: 2;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #D8E8DC;
            padding: 48px 0 24px;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 36px;
        }
        .footer-brand .site-logo {
            font-size: 20px;
            margin-bottom: 12px;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: #B8CCC0;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 700;
            letter-spacing: 0.04em;
            margin-bottom: 14px;
            text-transform: uppercase;
        }
        .footer-col ul {
            margin: 0;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: #B8CCC0;
            font-size: 14px;
            transition: var(--transition);
        }
        .footer-col ul li a:hover {
            color: var(--accent);
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 13px;
            color: #8FA99C;
        }
        .footer-bottom a {
            color: #B8CCC0;
        }
        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .grid-3 { grid-template-columns: repeat(2, 1fr); }
            .grid-4 { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-space: 52px;
            }
            .section { padding: 48px 0; }
            .site-nav {
                display: none;
                flex-direction: column;
                align-items: stretch;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary-dark);
                padding: 16px 24px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                gap: 4px;
                z-index: 49;
            }
            .site-nav.open {
                display: flex;
            }
            .site-nav a {
                padding: 10px 14px;
                font-size: 16px;
            }
            .nav-cta {
                font-size: 13px;
                padding: 8px 16px;
            }
            .nav-toggle {
                display: flex;
            }
            .grid-2 { grid-template-columns: 1fr; }
            .grid-3 { grid-template-columns: 1fr; }
            .grid-4 { grid-template-columns: 1fr; }
            .page-header {
                min-height: 200px;
                padding: calc(var(--header-height) + 32px) 0 28px;
            }
            .page-header h1 {
                font-size: 1.65rem;
            }
            .page-header .page-desc {
                font-size: 14.5px;
            }
            .timeline::before { left: 10px; }
            .timeline-item { padding-left: 36px; }
            .timeline-item::before { left: 4px; width: 14px; height: 14px; }
            .timeline-item.major::before { left: 3px; }
            .highlight-card {
                flex-direction: column;
                text-align: center;
                padding: 20px;
            }
            .highlight-card .highlight-img {
                width: 100%;
                height: auto;
                aspect-ratio: 16/7;
            }
            .cta-box { padding: 32px 20px; }
            .cta-box h2 { font-size: 1.3rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .site-header .container { padding: 0 16px; }
            .site-logo { font-size: 18px; }
            .logo-icon { width: 26px; height: 26px; font-size: 15px; }
            .nav-cta { padding: 7px 12px; font-size: 12px; }
            .page-header h1 { font-size: 1.4rem; }
            .section-head { margin-bottom: 28px; }
            .section-head p { font-size: 14.5px; }
            .timeline-card { padding: 16px 18px; }
            .timeline-card ul li { font-size: 13.5px; }
            .filter-tabs { gap: 6px; }
            .filter-tab { padding: 5px 12px; font-size: 12px; }
            .highlight-card .highlight-img { aspect-ratio: 16/9; }
            .btn { min-height: 40px; padding: 10px 18px; font-size: 14px; }
        }

/* roulang page: category4 */
:root {
            --primary: #0F3D2E;
            --primary-dark: #0A2F24;
            --accent: #B7F04A;
            --accent-soft: #D2FF66;
            --accent-green: #46C26B;
            --bg: #F4F7F1;
            --card: #FFFFFF;
            --text: #17211D;
            --text-muted: #6B7A70;
            --border: #D8E0D4;
            --orange: #F5A623;
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(13, 59, 46, 0.08);
            --shadow-card-hover: 0 18px 40px rgba(13, 59, 46, 0.16);
            --shadow-hero: 0 24px 60px rgba(10, 47, 36, 0.35);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-num: 'Inter', 'Roboto Mono', 'SF Mono', monospace;
            --container-max: 1200px;
            --header-height: 68px;
            --section-space: 64px;
            --section-space-mobile: 48px;
            --card-padding: 22px;
            --card-padding-mobile: 16px;
            --focus-ring: 2px solid var(--accent);
        }

        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            background-color: var(--bg);
            color: var(--text);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img,
        picture,
        svg {
            display: block;
            max-width: 100%;
            height: auto;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent-green);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: var(--focus-ring);
            outline-offset: 3px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-space) 0;
            position: relative;
        }

        .section-alt {
            background-color: #EBF1E7;
        }

        .section-dark {
            background-color: var(--primary);
            color: #fff;
        }

        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: #E6F0E8;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 36px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: 14px;
        }

        .section-head .eyebrow .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }

        .section-head h2 {
            font-size: 1.75rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 15.5px;
            line-height: 1.9;
        }

        .grid {
            display: grid;
            gap: 24px;
        }

        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 11px 22px;
            border-radius: var(--radius-btn);
            font-size: 14.5px;
            font-weight: 700;
            letter-spacing: 0.02em;
            transition: var(--transition);
            text-align: center;
            line-height: 1.4;
            min-height: 44px;
            cursor: pointer;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 6px 18px rgba(183, 240, 74, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-soft);
            color: var(--primary-dark);
            box-shadow: 0 10px 26px rgba(183, 240, 74, 0.5);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            transform: translateY(-2px);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            min-height: 36px;
            border-radius: 8px;
        }

        .btn-link {
            color: var(--primary);
            font-weight: 600;
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            border-radius: 0;
            min-height: auto;
        }

        .btn-link:hover {
            color: var(--accent-green);
            border-bottom-color: var(--accent);
            transform: none;
            box-shadow: none;
            background: none;
        }

        /* Header & Nav */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: var(--header-height);
            background: var(--primary-dark);
            z-index: 50;
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(10, 47, 36, 0.18);
            border-bottom: 1px solid rgba(255, 255, 255, 0.06);
        }

        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            gap: 20px;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 1.4rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .site-logo:hover {
            color: var(--accent);
        }

        .site-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 8px;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 1.2rem;
            font-weight: 800;
            font-family: var(--font-num);
            text-transform: uppercase;
        }

        .site-logo span {
            color: var(--accent);
        }

        .site-nav {
            display: flex;
            align-items: center;
            list-style: none;
            gap: 4px;
        }

        .site-nav li a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 14.5px;
            font-weight: 500;
            color: #E6F0E8;
            border-radius: 8px;
            position: relative;
            transition: var(--transition);
            white-space: nowrap;
        }

        .site-nav li a:hover {
            color: var(--accent);
            background: rgba(183, 240, 74, 0.08);
        }

        .site-nav li a[aria-current="page"] {
            color: var(--accent);
            font-weight: 700;
        }

        .site-nav li a[aria-current="page"]::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            flex-shrink: 0;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            cursor: pointer;
        }

        .nav-toggle span {
            display: block;
            width: 24px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }

        .nav-toggle[aria-expanded="true"] span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle[aria-expanded="true"] span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Inner page title bar */
        .page-hero {
            padding-top: calc(var(--header-height) + 48px);
            padding-bottom: 40px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, #1A5C44 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
        }

        .page-hero::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -10%;
            width: 500px;
            height: 500px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(183, 240, 74, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(230, 240, 232, 0.75);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: rgba(230, 240, 232, 0.75);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            font-size: 12px;
            opacity: 0.5;
        }

        .breadcrumb .current {
            color: var(--accent);
            font-weight: 600;
        }

        .page-hero h1 {
            font-size: 2.25rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.35;
            letter-spacing: 0.01em;
        }

        .page-hero p {
            font-size: 16px;
            color: rgba(230, 240, 232, 0.85);
            max-width: 640px;
            line-height: 1.85;
        }

        /* Download card */
        .download-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
        }

        .download-card {
            display: flex;
            align-items: center;
            gap: 20px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 18px 20px;
            transition: var(--transition);
            position: relative;
        }

        .download-card:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }

        .download-card .dc-thumb {
            width: 88px;
            height: 66px;
            flex-shrink: 0;
            border-radius: 8px;
            object-fit: cover;
            background: #E4EDE2;
        }

        .download-card .dc-body {
            flex: 1;
            min-width: 0;
        }

        .download-card .dc-title {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 4px;
            line-height: 1.4;
        }

        .download-card .dc-desc {
            font-size: 13.5px;
            color: var(--text-muted);
            line-height: 1.7;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .download-card .dc-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 12.5px;
            color: var(--text-muted);
        }

        .download-card .dc-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .dc-tag {
            display: inline-flex;
            align-items: center;
            padding: 3px 10px;
            border-radius: var(--radius-pill);
            font-size: 11.5px;
            font-weight: 600;
            letter-spacing: 0.02em;
            background: #EAF3E4;
            color: var(--primary);
        }

        .dc-tag.orange {
            background: #FFF3E0;
            color: #B56A00;
        }
        .dc-tag.green {
            background: #E2F5E4;
            color: #1E7A3A;
        }
        .dc-tag.blue {
            background: #E8F0FA;
            color: #2C5F8A;
        }

        .download-card .dc-action {
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 8px;
        }

        .dc-size {
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-num);
            font-weight: 500;
        }

        /* Version selector */
        .version-selector {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            margin-bottom: 20px;
        }

        .version-selector .vs-label {
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
            margin-right: 4px;
        }

        .version-selector .vs-chip {
            display: inline-flex;
            align-items: center;
            padding: 7px 16px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            background: var(--card);
            color: var(--text-muted);
            border: 1px solid var(--border);
            cursor: pointer;
            transition: var(--transition);
            white-space: nowrap;
        }

        .version-selector .vs-chip:hover {
            border-color: var(--accent-green);
            color: var(--primary);
        }

        .version-selector .vs-chip.active {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            font-weight: 700;
        }

        /* Notice blocks */
        .notice-block {
            display: flex;
            gap: 14px;
            padding: 16px 18px;
            border-radius: 10px;
            background: #FDF8E8;
            border: 1px solid #F0E0B0;
            margin-bottom: 12px;
        }

        .notice-block .nb-icon {
            width: 22px;
            height: 22px;
            flex-shrink: 0;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 6px;
            background: var(--orange);
            color: #fff;
            font-size: 13px;
            font-weight: 700;
            font-family: var(--font-num);
        }

        .notice-block p {
            font-size: 14px;
            color: #7A5B1E;
            line-height: 1.75;
        }

        /* Changelog summary */
        .changelog-mini {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .changelog-mini .cl-item {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 12px 0;
            border-bottom: 1px solid var(--border);
        }

        .changelog-mini .cl-item:last-child {
            border-bottom: none;
        }

        .changelog-mini .cl-ver {
            flex-shrink: 0;
            font-family: var(--font-num);
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            background: #EAF3E4;
            padding: 4px 10px;
            border-radius: 6px;
            white-space: nowrap;
        }

        .changelog-mini .cl-text {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.7;
            flex: 1;
        }

        .changelog-mini .cl-date {
            flex-shrink: 0;
            font-size: 12px;
            color: var(--text-muted);
            font-family: var(--font-num);
            white-space: nowrap;
        }

        /* Subscribe CTA */
        .cta-panel {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, #1A5C44 100%);
            border-radius: var(--radius-card);
            padding: 40px 36px;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            box-shadow: var(--shadow-hero);
            position: relative;
            overflow: hidden;
        }

        .cta-panel::after {
            content: '';
            position: absolute;
            top: -50%;
            right: -8%;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(183, 240, 74, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }

        .cta-panel .cta-info {
            flex: 1;
            min-width: 240px;
            position: relative;
            z-index: 1;
        }

        .cta-panel .cta-info h2 {
            font-size: 1.5rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 8px;
            line-height: 1.4;
        }

        .cta-panel .cta-info p {
            font-size: 14.5px;
            color: rgba(230, 240, 232, 0.85);
            line-height: 1.8;
            margin-bottom: 0;
        }

        .cta-panel .cta-action {
            flex-shrink: 0;
            position: relative;
            z-index: 1;
        }

        .subscribe-form {
            display: flex;
            gap: 10px;
            flex-wrap: wrap;
            align-items: center;
        }

        .subscribe-form input[type="email"] {
            padding: 11px 16px;
            border-radius: 8px;
            border: 1px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.1);
            color: #fff;
            font-size: 14px;
            min-width: 220px;
            flex: 1;
            transition: var(--transition);
        }

        .subscribe-form input[type="email"]::placeholder {
            color: rgba(230, 240, 232, 0.6);
        }

        .subscribe-form input[type="email"]:focus {
            outline: 2px solid var(--accent);
            outline-offset: 2px;
            border-color: var(--accent);
            background: rgba(255, 255, 255, 0.15);
        }

        .form-msg {
            font-size: 13px;
            margin-top: 8px;
            display: none;
        }
        .form-msg.success {
            display: block;
            color: var(--accent);
        }
        .form-msg.error {
            display: block;
            color: #FFB4A2;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #E6F0E8;
            padding: 48px 0 24px;
            margin-top: 0;
        }

        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 32px;
            margin-bottom: 32px;
        }

        .site-footer .footer-brand .site-logo {
            font-size: 1.3rem;
            margin-bottom: 12px;
        }

        .site-footer .footer-brand p {
            font-size: 13.5px;
            line-height: 1.8;
            color: rgba(230, 240, 232, 0.7);
            max-width: 300px;
        }

        .site-footer h4 {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            margin-bottom: 14px;
            letter-spacing: 0.03em;
        }

        .site-footer ul {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 8px;
        }

        .site-footer ul li a {
            font-size: 13.5px;
            color: rgba(230, 240, 232, 0.7);
            transition: var(--transition);
        }

        .site-footer ul li a:hover {
            color: var(--accent);
        }

        .site-footer .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding-top: 20px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 12.5px;
            color: rgba(230, 240, 232, 0.55);
        }

        .site-footer .footer-bottom a {
            color: rgba(230, 240, 232, 0.55);
        }

        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .site-nav li a {
                padding: 7px 10px;
                font-size: 13.5px;
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-4 {
                grid-template-columns: repeat(2, 1fr);
            }
            .site-footer .footer-grid {
                grid-template-columns: 1.5fr 1fr 1fr;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-space: var(--section-space-mobile);
                --card-padding: var(--card-padding-mobile);
            }

            .nav-toggle {
                display: flex;
            }

            .site-nav {
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary-dark);
                flex-direction: column;
                padding: 16px 24px;
                gap: 4px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                box-shadow: 0 12px 30px rgba(10, 47, 36, 0.4);
                display: none;
            }

            .site-nav.open {
                display: flex;
            }

            .site-nav li {
                width: 100%;
            }

            .site-nav li a {
                display: block;
                padding: 12px 16px;
                font-size: 15px;
                border-radius: 8px;
            }

            .site-nav li a[aria-current="page"]::after {
                display: none;
            }

            .site-nav li a[aria-current="page"] {
                background: rgba(183, 240, 74, 0.1);
                border-left: 3px solid var(--accent);
            }

            .nav-cta .btn {
                padding: 9px 16px;
                font-size: 13px;
                min-height: 38px;
            }

            .page-hero {
                min-height: 220px;
                padding-top: calc(var(--header-height) + 32px);
                padding-bottom: 28px;
            }

            .page-hero h1 {
                font-size: 1.65rem;
            }
            .page-hero p {
                font-size: 14.5px;
            }

            .grid-2,
            .grid-3,
            .grid-4 {
                grid-template-columns: 1fr;
            }

            .download-card {
                flex-direction: column;
                align-items: flex-start;
                gap: 14px;
                padding: 16px;
            }

            .download-card .dc-thumb {
                width: 100%;
                height: 150px;
                aspect-ratio: 16/7;
            }

            .download-card .dc-action {
                flex-direction: row;
                align-items: center;
                justify-content: space-between;
                width: 100%;
            }

            .cta-panel {
                flex-direction: column;
                align-items: flex-start;
                padding: 28px 20px;
            }

            .cta-panel .cta-info h2 {
                font-size: 1.3rem;
            }

            .subscribe-form input[type="email"] {
                min-width: 100%;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }

            .section-head h2 {
                font-size: 1.4rem;
            }

            .page-hero h1 {
                font-size: 1.4rem;
            }

            .breadcrumb {
                font-size: 12px;
                gap: 5px;
            }

            .download-card .dc-action {
                flex-wrap: wrap;
                gap: 10px;
            }

            .download-card .dc-action .btn {
                flex: 1;
                min-width: 120px;
            }

            .changelog-mini .cl-item {
                flex-wrap: wrap;
                gap: 6px;
            }
            .changelog-mini .cl-date {
                width: 100%;
                text-align: left;
            }

            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
                text-align: left;
            }
        }

/* roulang page: category3 */
:root {
            --primary: #0F3D2E;
            --primary-dark: #0A2F24;
            --accent: #B7F04A;
            --accent-soft: #D2FF66;
            --accent-green: #46C26B;
            --bg: #F4F7F1;
            --card: #FFFFFF;
            --text: #17211D;
            --text-muted: #6B7A70;
            --border: #D8E0D4;
            --orange: #F5A623;
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(13, 59, 46, 0.08);
            --shadow-card-hover: 0 18px 40px rgba(13, 59, 46, 0.16);
            --shadow-hero: 0 24px 60px rgba(10, 47, 36, 0.35);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-num: 'Inter', 'Roboto Mono', 'SF Mono', monospace;
            --container-max: 1200px;
            --header-height: 68px;
            --section-space: 88px;
            --section-space-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
            --focus-ring: 2px solid var(--accent);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            background-color: var(--bg);
            color: var(--text);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        img,
        picture,
        svg {
            display: block;
            max-width: 100%;
            height: auto;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent-green);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: var(--focus-ring);
            outline-offset: 3px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-space) 0;
            position: relative;
        }

        .section-alt {
            background-color: #EBF1E7;
        }

        .section-dark {
            background-color: var(--primary);
            color: #fff;
        }

        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: #E6F0E8;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: 16px;
        }

        .section-head .eyebrow .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.9;
        }

        .grid {
            display: grid;
            gap: 28px;
        }

        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }

        .card-img {
            border-radius: 10px;
            margin-bottom: 18px;
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: #E4EDE2;
        }

        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: #EAF3E4;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .card-tag.orange {
            background: #FFF3E0;
            color: #B56A00;
        }

        .card-tag.green {
            background: #E2F5E4;
            color: #1E7A3A;
        }

        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text);
            font-weight: 700;
        }

        .card p {
            font-size: 14.5px;
            line-height: 1.85;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .card .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12.5px;
            color: var(--text-muted);
            margin-top: 12px;
        }

        .card .card-meta .sep {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--border);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.02em;
            transition: var(--transition);
            text-align: center;
            line-height: 1.4;
            min-height: 46px;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 6px 18px rgba(183, 240, 74, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-soft);
            color: var(--primary-dark);
            box-shadow: 0 10px 26px rgba(183, 240, 74, 0.5);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-secondary:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 13px;
            min-height: 38px;
            border-radius: 8px;
        }

        .text-muted {
            color: var(--text-muted);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            height: var(--header-height);
            background: var(--primary-dark);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 16px rgba(10, 47, 36, 0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            width: 100%;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        .site-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            background: var(--accent);
            color: var(--primary);
            border-radius: 8px;
            font-size: 18px;
            font-weight: 800;
            text-transform: uppercase;
            flex-shrink: 0;
        }

        .site-logo span {
            color: var(--accent);
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 28px;
            list-style: none;
            margin: 0;
            padding: 0;
        }

        .site-nav a {
            color: #E6F0E8;
            font-size: 14.5px;
            font-weight: 600;
            letter-spacing: 0.02em;
            position: relative;
            padding: 6px 0;
            white-space: nowrap;
        }

        .site-nav a:hover {
            color: var(--accent);
        }

        .site-nav a[aria-current="page"] {
            color: var(--accent);
        }

        .site-nav a[aria-current="page"]::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background: var(--accent);
            border-radius: 2px;
        }

        .btn-nav {
            padding: 10px 22px;
            font-size: 14px;
            min-height: 42px;
            border-radius: 10px;
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            background: transparent;
            border: 1px solid var(--border);
            border-radius: 8px;
            color: #fff;
            font-size: 20px;
            padding: 6px 12px;
            line-height: 1;
        }

        /* Breadcrumb */
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            list-style: none;
            padding: 0;
            margin: 0 0 18px 0;
            font-size: 13.5px;
            color: rgba(255, 255, 255, 0.7);
        }

        .breadcrumb li+li::before {
            content: '/';
            margin-right: 8px;
            color: rgba(255, 255, 255, 0.5);
        }

        .breadcrumb a {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        /* Page hero */
        .page-hero {
            padding-top: calc(var(--header-height) + 56px);
            padding-bottom: 48px;
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, #0D3A2E 100%);
            color: #fff;
            position: relative;
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
        }

        .page-hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 50%;
            background-image: url('/assets/images/372e35c77d44b385.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.18;
            pointer-events: none;
        }

        .page-hero .container {
            position: relative;
            z-index: 1;
        }

        .page-hero h1 {
            font-size: 34px;
            font-weight: 800;
            letter-spacing: 0.02em;
            margin-bottom: 14px;
            line-height: 1.3;
            color: #fff;
        }

        .page-hero .page-desc {
            max-width: 680px;
            font-size: 16px;
            line-height: 1.85;
            color: #DCE8DF;
            margin: 0;
        }

        /* FAQ search */
        .faq-search-wrap {
            margin-top: -28px;
            position: relative;
            z-index: 5;
            margin-bottom: 36px;
        }

        .faq-search-card {
            background: var(--card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px;
            border: 1px solid var(--border);
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .faq-search-card input[type="search"] {
            flex: 1;
            min-width: 220px;
            padding: 12px 18px;
            border: 1.5px solid var(--border);
            border-radius: 8px;
            font-size: 15px;
            color: var(--text);
            background: #FBFDFA;
            transition: var(--transition);
        }

        .faq-search-card input[type="search"]:focus {
            border-color: var(--accent-green);
            outline: none;
            box-shadow: 0 0 0 3px rgba(183, 240, 74, 0.35);
        }

        .faq-search-card .btn {
            flex-shrink: 0;
        }

        /* Hot tags */
        .hot-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 18px;
        }

        .hot-tags .hot-tag-label {
            font-size: 13px;
            font-weight: 700;
            color: var(--primary);
            letter-spacing: 0.03em;
        }

        .hot-tag {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 12.5px;
            font-weight: 600;
            background: #EAF3E4;
            color: var(--primary);
            cursor: pointer;
            transition: var(--transition);
            border: 1px solid transparent;
        }

        .hot-tag:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }

        /* FAQ accordion */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }

        .faq-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: var(--accent-green);
        }

        .faq-item.open {
            border-color: var(--accent-green);
            box-shadow: var(--shadow-card-hover);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            width: 100%;
            padding: 18px 24px;
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            text-align: left;
            transition: var(--transition);
            background: transparent;
            cursor: pointer;
        }

        .faq-question:hover {
            color: var(--primary);
            background: #F8FBF5;
        }

        .faq-item.open .faq-question {
            color: var(--primary);
            background: #F8FBF5;
        }

        .faq-question .faq-q-text {
            flex: 1;
        }

        .faq-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: #EAF3E4;
            color: var(--primary);
            font-size: 16px;
            font-weight: 700;
            flex-shrink: 0;
            transition: var(--transition);
        }

        .faq-item.open .faq-icon {
            background: var(--accent);
            color: var(--primary-dark);
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 24px;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding-bottom: 20px;
        }

        .faq-answer p {
            font-size: 14.5px;
            line-height: 1.9;
            color: var(--text-muted);
            margin: 0;
            padding-top: 4px;
            border-top: 1px solid var(--border);
        }

        /* FAQ sidebar */
        .faq-layout {
            display: grid;
            grid-template-columns: 1fr 320px;
            gap: 32px;
            align-items: start;
        }

        .faq-sidebar {
            display: flex;
            flex-direction: column;
            gap: 22px;
            position: sticky;
            top: calc(var(--header-height) + 24px);
        }

        .faq-help-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 22px;
        }

        .faq-help-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: var(--text);
        }

        .faq-help-card p {
            font-size: 13.5px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 14px;
        }

        .faq-help-card .btn {
            width: 100%;
        }

        .faq-doc-card {
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 22px;
            color: #fff;
            box-shadow: var(--shadow-card);
        }

        .faq-doc-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: #fff;
        }

        .faq-doc-card p {
            font-size: 13.5px;
            line-height: 1.8;
            color: #CFE0D5;
            margin-bottom: 14px;
        }

        .faq-doc-card .btn {
            width: 100%;
        }

        .faq-doc-card .btn-secondary {
            border-color: var(--accent);
            color: var(--accent);
        }

        .faq-doc-card .btn-secondary:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
        }

        /* CTA section */
        .cta-band {
            background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 55%, #0D3A2E 100%);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-hero);
            padding: 48px 40px;
            display: grid;
            grid-template-columns: 1.2fr 1fr;
            gap: 32px;
            align-items: center;
            overflow: hidden;
            position: relative;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            bottom: 0;
            width: 40%;
            background-image: url('/assets/images/a2c6ae8987584902.webp');
            background-size: cover;
            background-position: center;
            opacity: 0.3;
            pointer-events: none;
        }

        .cta-band-content {
            position: relative;
            z-index: 1;
        }

        .cta-band-content h2 {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .cta-band-content p {
            font-size: 15px;
            line-height: 1.85;
            color: #DCE8DF;
            margin-bottom: 22px;
            max-width: 520px;
        }

        .cta-band-content .btn {
            margin-right: 10px;
        }

        .cta-band-img {
            position: relative;
            z-index: 1;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 12px 32px rgba(0, 0, 0, 0.3);
        }

        .cta-band-img img {
            width: 100%;
            aspect-ratio: 16/10;
            object-fit: cover;
            display: block;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            color: #E6F0E8;
            padding: 56px 0 0;
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .site-logo {
            color: #fff;
            font-size: 20px;
            margin-bottom: 14px;
        }

        .footer-brand .site-logo .logo-icon {
            width: 28px;
            height: 28px;
            font-size: 16px;
        }

        .footer-brand p {
            font-size: 13.5px;
            line-height: 1.85;
            color: #A8BFAF;
            max-width: 360px;
            margin: 0;
        }

        .footer-col h4 {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.04em;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul a {
            font-size: 13.5px;
            color: #A8BFAF;
            transition: var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            padding: 22px 0;
            font-size: 13px;
            color: #A8BFAF;
        }

        .footer-bottom a {
            color: #A8BFAF;
            transition: var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }

            .faq-layout {
                grid-template-columns: 1fr;
            }

            .faq-sidebar {
                position: static;
                flex-direction: row;
                flex-wrap: wrap;
            }

            .faq-help-card,
            .faq-doc-card {
                flex: 1 1 calc(50% - 12px);
                min-width: 240px;
            }

            .cta-band {
                grid-template-columns: 1fr;
                padding: 36px 28px;
            }

            .cta-band-img {
                max-width: 480px;
            }

            .page-hero h1 {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --header-height: 60px;
                --section-space: 52px;
                --card-padding: 18px;
            }

            .site-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary-dark);
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 16px 24px;
                box-shadow: 0 12px 28px rgba(10, 47, 36, 0.3);
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }

            .site-nav.open {
                display: flex;
            }

            .site-nav li {
                width: 100%;
            }

            .site-nav a {
                display: block;
                padding: 12px 0;
                font-size: 15px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }

            .site-nav a[aria-current="page"]::after {
                display: none;
            }

            .nav-toggle {
                display: inline-flex;
                align-items: center;
                justify-content: center;
            }

            .btn-nav {
                display: none;
            }

            .page-hero {
                min-height: 220px;
                padding-top: calc(var(--header-height) + 36px);
                padding-bottom: 36px;
            }

            .page-hero h1 {
                font-size: 24px;
            }

            .page-hero .page-desc {
                font-size: 14.5px;
            }

            .faq-search-card {
                flex-direction: column;
                align-items: stretch;
                padding: 20px;
            }

            .faq-search-card .btn {
                width: 100%;
            }

            .faq-question {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 18px;
            }

            .faq-item.open .faq-answer {
                padding-bottom: 16px;
            }

            .cta-band {
                padding: 28px 20px;
                gap: 20px;
            }

            .cta-band-content h2 {
                font-size: 22px;
            }

            .cta-band-content .btn {
                display: flex;
                width: 100%;
                margin: 0 0 10px 0;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
                padding-bottom: 28px;
            }

            .footer-brand p {
                max-width: 100%;
            }

            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 8px;
            }

            .faq-sidebar {
                flex-direction: column;
            }

            .faq-help-card,
            .faq-doc-card {
                flex: 1 1 100%;
                min-width: 0;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .page-hero h1 {
                font-size: 22px;
            }

            .page-hero .page-desc {
                font-size: 13.5px;
            }

            .faq-question {
                font-size: 14px;
                padding: 14px 16px;
                gap: 10px;
            }

            .faq-icon {
                width: 24px;
                height: 24px;
                font-size: 14px;
            }

            .faq-answer p {
                font-size: 13.5px;
            }

            .hot-tag {
                font-size: 11.5px;
                padding: 5px 10px;
            }

            .cta-band-content h2 {
                font-size: 20px;
            }

            .cta-band-content p {
                font-size: 13.5px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #0F3D2E;
            --primary-dark: #0A2F24;
            --accent: #B7F04A;
            --accent-soft: #D2FF66;
            --accent-green: #46C26B;
            --bg: #F4F7F1;
            --card: #FFFFFF;
            --text: #17211D;
            --text-muted: #6B7A70;
            --border: #D8E0D4;
            --orange: #F5A623;
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(13, 59, 46, 0.08);
            --shadow-card-hover: 0 18px 40px rgba(13, 59, 46, 0.16);
            --shadow-hero: 0 24px 60px rgba(10, 47, 36, 0.35);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-num: 'Inter', 'Roboto Mono', 'SF Mono', monospace;
            --container-max: 1200px;
            --header-height: 68px;
            --section-space: 88px;
            --section-space-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
            --focus-ring: 2px solid var(--accent);
        }

        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            background-color: var(--bg);
            color: var(--text);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            padding-top: var(--header-height);
        }

        img,
        picture,
        svg {
            display: block;
            max-width: 100%;
            height: auto;
        }

        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }

        a:hover {
            color: var(--accent-green);
        }

        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: var(--focus-ring);
            outline-offset: 3px;
        }

        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }

        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }

        .text-muted {
            color: var(--text-muted);
        }

        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }

        .section {
            padding: var(--section-space) 0;
            position: relative;
        }

        .section-alt {
            background-color: #EBF1E7;
        }

        .section-dark {
            background-color: var(--primary);
            color: #fff;
        }

        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: #E6F0E8;
        }

        .section-head {
            max-width: 720px;
            margin-bottom: 40px;
        }

        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: 16px;
        }

        .section-head .eyebrow .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }

        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.9;
        }

        .grid {
            display: grid;
            gap: 28px;
        }

        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }

        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }

        .grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }

        .grid-5 {
            grid-template-columns: repeat(5, 1fr);
        }

        .card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }

        .card-img {
            border-radius: 10px;
            margin-bottom: 18px;
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: #E4EDE2;
        }

        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: #EAF3E4;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }

        .card-tag.orange {
            background: #FFF3E0;
            color: #B56A00;
        }

        .card-tag.green {
            background: #E2F5E4;
            color: #1E7A3A;
        }

        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text);
            line-height: 1.4;
        }

        .card p {
            font-size: 14.5px;
            line-height: 1.85;
            color: var(--text-muted);
            margin-bottom: 0;
        }

        .card .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12.5px;
            color: var(--text-muted);
            margin-top: 12px;
        }

        .card .card-meta .sep {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--border);
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.02em;
            transition: var(--transition);
            text-align: center;
            line-height: 1.4;
            min-height: 46px;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 6px 18px rgba(183, 240, 74, 0.35);
        }

        .btn-primary:hover {
            background: var(--accent-soft);
            color: var(--primary-dark);
            box-shadow: 0 10px 26px rgba(183, 240, 74, 0.5);
            transform: translateY(-2px);
        }

        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }

        .btn-secondary:hover {
            background: #E8F2E3;
            color: var(--primary-dark);
            border-color: var(--accent-green);
        }

        .btn-sm {
            padding: 8px 16px;
            font-size: 14px;
            min-height: 38px;
            border-radius: 8px;
        }

        .btn-text {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-weight: 600;
            font-size: 14px;
            color: var(--primary);
            padding: 4px 0;
            border-bottom: 2px solid transparent;
            transition: var(--transition);
        }

        .btn-text:hover {
            color: var(--accent-green);
            border-bottom-color: var(--accent-green);
        }

        /* Header */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            height: var(--header-height);
            background: var(--primary-dark);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            box-shadow: 0 4px 20px rgba(10, 47, 36, 0.25);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            width: 100%;
        }

        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            color: #fff;
            font-size: 1.35rem;
            font-weight: 800;
            letter-spacing: -0.01em;
            white-space: nowrap;
            transition: var(--transition);
        }

        .site-logo:hover {
            color: var(--accent);
        }

        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 34px;
            height: 34px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .site-logo span {
            color: var(--accent);
        }

        .site-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            flex-wrap: nowrap;
        }

        .site-nav a {
            display: inline-block;
            padding: 8px 14px;
            color: #E6F0E8;
            font-size: 15px;
            font-weight: 500;
            border-radius: 8px;
            transition: var(--transition);
            position: relative;
        }

        .site-nav a:hover {
            color: var(--accent);
            background: rgba(183, 240, 74, 0.1);
        }

        .site-nav a[aria-current="page"] {
            color: var(--accent);
            background: rgba(183, 240, 74, 0.12);
            font-weight: 600;
        }

        .site-nav a[aria-current="page"]::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }

        .nav-cta {
            white-space: nowrap;
            padding: 10px 20px;
            font-size: 14px;
            min-height: 42px;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border-radius: 8px;
        }

        .nav-toggle span {
            width: 24px;
            height: 2px;
            background: #E6F0E8;
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Page title bar */
        .page-title-bar {
            background: var(--primary-dark);
            padding: 56px 0 48px;
            position: relative;
            overflow: hidden;
            min-height: 260px;
            display: flex;
            align-items: center;
        }

        .page-title-bar::after {
            content: '';
            position: absolute;
            right: -80px;
            top: -60px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: rgba(183, 240, 74, 0.08);
            pointer-events: none;
        }

        .page-title-bar .container {
            position: relative;
            z-index: 1;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: rgba(230, 240, 232, 0.7);
            margin-bottom: 16px;
        }

        .breadcrumb a {
            color: rgba(230, 240, 232, 0.85);
            transition: var(--transition);
        }

        .breadcrumb a:hover {
            color: var(--accent);
        }

        .breadcrumb .sep {
            color: rgba(230, 240, 232, 0.4);
        }

        .page-title-bar h1 {
            font-size: 2.25rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.3;
            margin-bottom: 12px;
            letter-spacing: -0.01em;
        }

        .page-title-bar .lead {
            color: rgba(230, 240, 232, 0.85);
            font-size: 16.5px;
            line-height: 1.9;
            max-width: 680px;
        }

        /* Quick entry */
        .quick-entry-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 18px;
        }

        .quick-entry {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 20px 18px;
            display: flex;
            align-items: center;
            gap: 14px;
            transition: var(--transition);
            cursor: pointer;
            text-decoration: none;
            color: var(--text);
        }

        .quick-entry:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
            color: var(--primary);
        }

        .quick-entry .qe-icon {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: #EAF3E4;
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.1rem;
            flex-shrink: 0;
        }

        .quick-entry .qe-info h4 {
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 2px;
            color: var(--text);
            line-height: 1.4;
        }

        .quick-entry .qe-info p {
            font-size: 12.5px;
            color: var(--text-muted);
            line-height: 1.6;
            margin: 0;
        }

        /* Filter tags */
        .filter-tags {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 28px;
        }

        .filter-tags .filter-label {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 600;
            margin-right: 4px;
        }

        .filter-tag {
            padding: 7px 18px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 600;
            background: var(--card);
            color: var(--text-muted);
            border: 1px solid var(--border);
            transition: var(--transition);
            cursor: pointer;
            white-space: nowrap;
        }

        .filter-tag:hover {
            border-color: var(--accent-green);
            color: var(--primary);
        }

        .filter-tag.active {
            background: var(--accent);
            color: var(--primary);
            border-color: var(--accent);
            font-weight: 700;
        }

        /* Doc cards grid */
        .doc-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 26px;
        }

        .doc-card .card-img-wrap {
            position: relative;
            overflow: hidden;
            border-radius: 10px;
            margin-bottom: 16px;
            aspect-ratio: 16/9;
        }

        .doc-card .card-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            border-radius: 10px;
            transition: var(--transition);
        }

        .doc-card .card-img-wrap img:hover {
            transform: scale(1.03);
        }

        .doc-card h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 8px;
            line-height: 1.45;
        }

        .doc-card .doc-excerpt {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-muted);
            margin-bottom: 14px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* Steps */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
            counter-reset: step;
        }

        .step-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: 28px 22px;
            position: relative;
            transition: var(--transition);
        }

        .step-item:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
        }

        .step-num {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary);
            font-weight: 800;
            font-size: 1.05rem;
            margin-bottom: 14px;
        }

        .step-item h3 {
            font-size: 1.05rem;
            font-weight: 700;
            margin-bottom: 8px;
            color: var(--text);
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            margin: 0;
        }

        /* Version banner */
        .version-banner {
            background: #FFF9F0;
            border: 1px solid #F5D9A8;
            border-left: 5px solid var(--orange);
            border-radius: var(--radius-card);
            padding: 24px 28px;
            display: flex;
            align-items: flex-start;
            gap: 16px;
            box-shadow: 0 6px 18px rgba(13, 59, 46, 0.05);
        }

        .vb-icon {
            font-size: 1.6rem;
            line-height: 1;
            flex-shrink: 0;
            color: var(--orange);
        }

        .vb-content h3 {
            font-size: 1.1rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 6px;
        }

        .vb-content p {
            font-size: 14.5px;
            color: var(--text-muted);
            line-height: 1.8;
            margin: 0;
        }

        /* Download CTA */
        .download-cta {
            background: var(--primary);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-hero);
            padding: 44px 40px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            flex-wrap: wrap;
            position: relative;
            overflow: hidden;
        }

        .download-cta::before {
            content: '';
            position: absolute;
            right: -60px;
            bottom: -80px;
            width: 280px;
            height: 280px;
            border-radius: 50%;
            background: rgba(183, 240, 74, 0.1);
            pointer-events: none;
        }

        .download-cta .cta-text h2 {
            color: #fff;
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 8px;
            position: relative;
            z-index: 1;
        }

        .download-cta .cta-text p {
            color: rgba(230, 240, 232, 0.85);
            font-size: 15px;
            margin: 0;
            position: relative;
            z-index: 1;
        }

        .download-cta .btn {
            position: relative;
            z-index: 1;
            flex-shrink: 0;
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            padding: 56px 0 24px;
            color: rgba(230, 240, 232, 0.8);
            margin-top: 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 36px;
            margin-bottom: 40px;
        }

        .footer-brand .site-logo {
            margin-bottom: 14px;
            font-size: 1.25rem;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.85;
            color: rgba(230, 240, 232, 0.65);
            max-width: 340px;
            margin: 0;
        }

        .footer-col h4 {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 14px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .footer-col ul li {
            margin-bottom: 8px;
        }

        .footer-col ul a {
            color: rgba(230, 240, 232, 0.7);
            font-size: 14px;
            transition: var(--transition);
        }

        .footer-col ul a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(230, 240, 232, 0.55);
        }

        .footer-bottom a {
            color: rgba(230, 240, 232, 0.7);
            transition: var(--transition);
        }

        .footer-bottom a:hover {
            color: var(--accent);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            :root {
                --section-space: 64px;
            }

            .quick-entry-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .doc-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }

            .grid-3,
            .grid-4,
            .grid-5 {
                grid-template-columns: repeat(2, 1fr);
            }

            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
        }

        @media (max-width: 768px) {
            :root {
                --section-space: 52px;
                --card-padding: 18px;
                --header-height: 60px;
            }

            body {
                padding-top: var(--header-height);
                font-size: 15px;
            }

            .site-header {
                height: var(--header-height);
            }

            .site-nav {
                display: none;
                position: absolute;
                top: var(--header-height);
                left: 0;
                right: 0;
                background: var(--primary-dark);
                flex-direction: column;
                gap: 4px;
                padding: 16px 24px 20px;
                box-shadow: 0 12px 30px rgba(10, 47, 36, 0.35);
                border-top: 1px solid rgba(255, 255, 255, 0.1);
            }

            .site-nav.open {
                display: flex;
            }

            .site-nav a {
                width: 100%;
                text-align: left;
                padding: 12px 14px;
                font-size: 16px;
            }

            .site-nav a[aria-current="page"]::after {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-cta {
                padding: 8px 16px;
                font-size: 13px;
                min-height: 36px;
            }

            .page-title-bar {
                padding: 40px 0 36px;
                min-height: 220px;
            }

            .page-title-bar h1 {
                font-size: 1.7rem;
            }

            .quick-entry-grid {
                grid-template-columns: 1fr;
            }

            .doc-grid {
                grid-template-columns: 1fr;
            }

            .steps-grid {
                grid-template-columns: 1fr;
            }

            .download-cta {
                padding: 32px 24px;
                flex-direction: column;
                align-items: flex-start;
            }

            .version-banner {
                flex-direction: column;
                padding: 20px;
            }

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }

            .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                text-align: left;
            }
        }

        @media (max-width: 480px) {
            .container {
                padding: 0 16px;
            }

            .page-title-bar h1 {
                font-size: 1.45rem;
            }

            .page-title-bar .lead {
                font-size: 15px;
            }

            .filter-tags {
                gap: 6px;
            }

            .filter-tag {
                padding: 5px 12px;
                font-size: 12px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 14px;
                min-height: 40px;
            }

            .download-cta .cta-text h2 {
                font-size: 1.3rem;
            }
        }

/* roulang page: category5 */
:root {
            --primary: #0F3D2E;
            --primary-dark: #0A2F24;
            --accent: #B7F04A;
            --accent-soft: #D2FF66;
            --accent-green: #46C26B;
            --bg: #F4F7F1;
            --card: #FFFFFF;
            --text: #17211D;
            --text-muted: #6B7A70;
            --border: #D8E0D4;
            --orange: #F5A623;
            --radius-card: 14px;
            --radius-btn: 10px;
            --radius-pill: 999px;
            --shadow-card: 0 10px 30px rgba(13, 59, 46, 0.08);
            --shadow-card-hover: 0 18px 40px rgba(13, 59, 46, 0.16);
            --shadow-hero: 0 24px 60px rgba(10, 47, 36, 0.35);
            --transition: all 0.25s ease;
            --font-sans: 'PingFang SC', 'Noto Sans SC', 'Microsoft YaHei', 'Helvetica Neue', sans-serif;
            --font-num: 'Inter', 'Roboto Mono', 'SF Mono', monospace;
            --container-max: 1200px;
            --header-height: 68px;
            --section-space: 88px;
            --section-space-mobile: 52px;
            --card-padding: 24px;
            --card-padding-mobile: 18px;
            --focus-ring: 2px solid var(--accent);
        }
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
            text-size-adjust: 100%;
        }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.85;
            background-color: var(--bg);
            color: var(--text);
            min-height: 100vh;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        img,
        picture,
        svg {
            display: block;
            max-width: 100%;
            height: auto;
        }
        a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        a:hover {
            color: var(--accent-green);
        }
        a:focus-visible,
        button:focus-visible,
        input:focus-visible,
        select:focus-visible,
        textarea:focus-visible {
            outline: var(--focus-ring);
            outline-offset: 3px;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        select,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
        }
        .section {
            padding: var(--section-space) 0;
            position: relative;
        }
        .section-alt {
            background-color: #EBF1E7;
        }
        .section-dark {
            background-color: var(--primary);
            color: #fff;
        }
        .section-dark h2,
        .section-dark h3,
        .section-dark p {
            color: #E6F0E8;
        }
        .section-head {
            max-width: 720px;
            margin-bottom: 40px;
        }
        .section-head .eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            padding: 6px 14px;
            border-radius: var(--radius-pill);
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.03em;
            margin-bottom: 16px;
        }
        .section-head .eyebrow .dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }
        .section-head p {
            color: var(--text-muted);
            font-size: 16px;
            line-height: 1.9;
        }
        .grid {
            display: grid;
            gap: 28px;
        }
        .grid-2 {
            grid-template-columns: repeat(2, 1fr);
        }
        .grid-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        .grid-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        .card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            padding: var(--card-padding);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }
        .card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }
        .card-img {
            border-radius: 10px;
            margin-bottom: 18px;
            width: 100%;
            aspect-ratio: 16/9;
            object-fit: cover;
            background: #E4EDE2;
        }
        .card-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 4px 12px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
            background: #EAF3E4;
            color: var(--primary);
            margin-bottom: 12px;
            letter-spacing: 0.02em;
        }
        .card-tag.orange {
            background: #FFF3E0;
            color: #B56A00;
        }
        .card-tag.green {
            background: #E2F5E4;
            color: #1E7A3A;
        }
        .card h3 {
            font-size: 1.15rem;
            margin-bottom: 8px;
            color: var(--text);
        }
        .card p {
            font-size: 14.5px;
            line-height: 1.85;
            color: var(--text-muted);
            margin-bottom: 0;
        }
        .card .card-meta {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 10px;
            font-size: 12.5px;
            color: var(--text-muted);
            margin-top: 12px;
        }
        .card .card-meta .sep {
            width: 3px;
            height: 3px;
            border-radius: 50%;
            background: var(--border);
        }
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 12px 24px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 700;
            letter-spacing: 0.02em;
            transition: var(--transition);
            text-align: center;
            line-height: 1.4;
            min-height: 46px;
            cursor: pointer;
        }
        .btn-primary {
            background: var(--accent);
            color: var(--primary);
            box-shadow: 0 6px 18px rgba(183, 240, 74, 0.35);
        }
        .btn-primary:hover {
            background: var(--accent-soft);
            color: var(--primary-dark);
            box-shadow: 0 10px 26px rgba(183, 240, 74, 0.5);
            transform: translateY(-2px);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 2px solid var(--primary);
        }
        .btn-secondary:hover {
            background: #EAF3E4;
            border-color: var(--accent-green);
            color: var(--primary-dark);
        }
        .btn-sm {
            padding: 8px 16px;
            min-height: 36px;
            font-size: 13.5px;
            border-radius: 8px;
        }
        .btn-link {
            color: var(--primary);
            font-weight: 600;
            font-size: 14px;
            padding: 0;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            min-height: auto;
        }
        .btn-link:hover {
            color: var(--accent-green);
            text-decoration: underline;
        }

        /* 导航 */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 50;
            height: var(--header-height);
            background-color: rgba(10, 47, 36, 0.96);
            backdrop-filter: blur(10px);
            -webkit-backdrop-filter: blur(10px);
            display: flex;
            align-items: center;
            box-shadow: 0 2px 20px rgba(0, 0, 0, 0.25);
        }
        .site-header .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
        }
        .site-logo {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: #fff;
            font-weight: 800;
            font-size: 1.3rem;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }
        .site-logo:hover {
            color: var(--accent);
        }
        .site-logo .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            background: var(--accent);
            color: var(--primary-dark);
            font-weight: 900;
            font-size: 15px;
            letter-spacing: 0;
            flex-shrink: 0;
        }
        .site-logo span {
            color: var(--accent);
        }
        .site-nav {
            display: flex;
            align-items: center;
            gap: 8px;
            list-style: none;
            margin: 0;
            padding: 0;
        }
        .site-nav a {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            color: #E6F0E8;
            font-size: 14.5px;
            font-weight: 500;
            border-radius: 8px;
            position: relative;
        }
        .site-nav a:hover {
            color: var(--accent);
            background-color: rgba(183, 240, 74, 0.08);
        }
        .site-nav a[aria-current="page"] {
            color: var(--accent);
            font-weight: 700;
        }
        .site-nav a[aria-current="page"]::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 14px;
            right: 14px;
            height: 2px;
            background: var(--accent);
            border-radius: 2px;
        }
        .nav-cta {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 10px 20px;
            background: var(--accent);
            color: var(--primary-dark);
            border-radius: var(--radius-btn);
            font-weight: 700;
            font-size: 14.5px;
            box-shadow: 0 4px 14px rgba(183, 240, 74, 0.3);
            transition: var(--transition);
            white-space: nowrap;
        }
        .nav-cta:hover {
            background: var(--accent-soft);
            color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 8px 22px rgba(183, 240, 74, 0.45);
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            background: transparent;
            border: 1px solid rgba(255, 255, 255, 0.25);
            border-radius: 8px;
        }
        .nav-toggle span {
            width: 22px;
            height: 2px;
            background: #fff;
            border-radius: 2px;
            transition: var(--transition);
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* 内页标题条 */
        .page-header {
            padding: 140px 0 60px;
            background-color: var(--primary-dark);
            background-image: linear-gradient(140deg, rgba(15, 61, 46, 0.96) 0%, rgba(10, 47, 36, 0.88) 55%, rgba(15, 61, 46, 0.7) 100%);
            position: relative;
            overflow: hidden;
        }
        .page-header::before {
            content: '';
            position: absolute;
            top: -40%;
            right: -10%;
            width: 55%;
            height: 180%;
            background: radial-gradient(ellipse at center, rgba(183, 240, 74, 0.12) 0%, transparent 70%);
            pointer-events: none;
        }
        .page-header .container {
            position: relative;
            z-index: 1;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            list-style: none;
            margin: 0 0 20px;
            padding: 0;
            font-size: 13.5px;
            color: rgba(230, 240, 232, 0.7);
        }
        .breadcrumb li {
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }
        .breadcrumb a {
            color: rgba(230, 240, 232, 0.7);
        }
        .breadcrumb a:hover {
            color: var(--accent);
        }
        .breadcrumb .sep {
            color: rgba(230, 240, 232, 0.4);
        }
        .breadcrumb li[aria-current="page"] {
            color: var(--accent);
            font-weight: 600;
        }
        .page-header h1 {
            font-size: clamp(1.9rem, 3.5vw, 2.6rem);
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.02em;
            margin-bottom: 14px;
            line-height: 1.3;
        }
        .page-header .page-desc {
            font-size: 16px;
            color: rgba(230, 240, 232, 0.82);
            max-width: 720px;
            line-height: 1.9;
        }

        /* 置顶新闻 */
        .featured-news {
            margin-top: 56px;
        }
        .featured-card {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0;
            background: var(--card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card-hover);
            border: 1px solid var(--border);
            transition: var(--transition);
        }
        .featured-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 24px 48px rgba(13, 59, 46, 0.18);
        }
        .featured-card .featured-img-wrap {
            position: relative;
            min-height: 320px;
            overflow: hidden;
        }
        .featured-card .featured-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }
        .featured-card .featured-badge {
            position: absolute;
            top: 16px;
            left: 16px;
            background: var(--orange);
            color: #fff;
            padding: 4px 14px;
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 700;
            letter-spacing: 0.04em;
        }
        .featured-card .featured-content {
            padding: 36px 40px;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .featured-card .featured-date {
            font-size: 13px;
            font-weight: 600;
            color: var(--orange);
            letter-spacing: 0.03em;
            margin-bottom: 8px;
        }
        .featured-card h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 14px;
            line-height: 1.4;
        }
        .featured-card p {
            font-size: 15px;
            color: var(--text-muted);
            line-height: 1.9;
            margin-bottom: 20px;
        }

        /* 新闻列表 */
        .news-grid {
            display: grid;
            grid-template-columns: repeat(2, 1fr);
            gap: 28px;
        }
        .news-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: var(--transition);
            display: flex;
            flex-direction: column;
        }
        .news-card:hover {
            transform: translateY(-3px);
            box-shadow: var(--shadow-card-hover);
            border-color: var(--accent-green);
        }
        .news-card .news-img-wrap {
            aspect-ratio: 16/9;
            overflow: hidden;
            background: #E4EDE2;
            position: relative;
        }
        .news-card .news-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .news-card:hover .news-img-wrap img {
            transform: scale(1.03);
        }
        .news-card .news-body {
            padding: 22px 24px 24px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .news-card .news-top {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            flex-wrap: wrap;
        }
        .news-card .news-date {
            font-size: 13px;
            color: var(--text-muted);
            font-weight: 500;
            letter-spacing: 0.02em;
        }
        .news-card h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 10px;
            line-height: 1.5;
        }
        .news-card p {
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.85;
            margin-bottom: 16px;
            flex: 1;
        }
        .news-card .btn-link {
            align-self: flex-start;
        }

        /* 数据快报 */
        .stats-strip {
            background: var(--primary);
            border-radius: var(--radius-card);
            padding: 40px 44px;
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            box-shadow: var(--shadow-hero);
        }
        .stats-strip .stat-item {
            text-align: center;
        }
        .stats-strip .stat-num {
            font-family: var(--font-num);
            font-size: 2.4rem;
            font-weight: 800;
            color: var(--accent);
            letter-spacing: 0.02em;
            line-height: 1.2;
        }
        .stats-strip .stat-label {
            font-size: 13.5px;
            color: rgba(230, 240, 232, 0.75);
            margin-top: 6px;
            font-weight: 500;
        }
        .stat-divider {
            width: 1px;
            height: 48px;
            background: rgba(230, 240, 232, 0.18);
            margin: 0 auto;
        }

        /* 标签云 */
        .tag-cloud {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .tag-cloud .tag-pill {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 20px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: var(--transition);
        }
        .tag-cloud .tag-pill:hover {
            background: var(--accent);
            color: var(--primary-dark);
            border-color: var(--accent);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(183, 240, 74, 0.3);
        }
        .tag-cloud .tag-pill .tag-count {
            font-size: 11px;
            background: #EAF3E4;
            color: var(--primary);
            padding: 2px 8px;
            border-radius: var(--radius-pill);
            font-weight: 700;
        }
        .tag-cloud .tag-pill:hover .tag-count {
            background: rgba(15, 61, 46, 0.15);
        }

        /* 订阅表单 */
        .subscribe-box {
            background: var(--primary-dark);
            border-radius: var(--radius-card);
            padding: 48px 52px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            align-items: center;
            box-shadow: var(--shadow-hero);
            position: relative;
            overflow: hidden;
        }
        .subscribe-box::before {
            content: '';
            position: absolute;
            top: -80%;
            left: -30%;
            width: 70%;
            height: 260%;
            background: radial-gradient(ellipse at center, rgba(183, 240, 74, 0.15) 0%, transparent 70%);
            pointer-events: none;
        }
        .subscribe-box .subscribe-info {
            position: relative;
            z-index: 1;
        }
        .subscribe-box h2 {
            font-size: 1.6rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            line-height: 1.4;
        }
        .subscribe-box p {
            font-size: 15px;
            color: rgba(230, 240, 232, 0.8);
            line-height: 1.9;
        }
        .subscribe-form {
            position: relative;
            z-index: 1;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
        }
        .subscribe-form input[type="email"] {
            flex: 1;
            min-width: 220px;
            padding: 12px 18px;
            border-radius: 8px;
            border: 2px solid rgba(255, 255, 255, 0.25);
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
            font-size: 15px;
            transition: var(--transition);
        }
        .subscribe-form input[type="email"]::placeholder {
            color: rgba(230, 240, 232, 0.55);
        }
        .subscribe-form input[type="email"]:focus {
            border-color: var(--accent);
            outline: none;
            box-shadow: 0 0 0 3px rgba(183, 240, 74, 0.25);
            background: rgba(255, 255, 255, 0.12);
        }
        .subscribe-form .btn-primary {
            flex-shrink: 0;
        }
        .form-msg {
            font-size: 13px;
            margin-top: 10px;
            display: none;
            width: 100%;
        }
        .form-msg.success {
            color: var(--accent);
            display: block;
        }
        .form-msg.error {
            color: #F87171;
            display: block;
        }

        /* CTA区 */
        .cta-band {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-card);
            padding: 52px 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow-hero);
        }
        .cta-band::after {
            content: '';
            position: absolute;
            bottom: -50%;
            right: -20%;
            width: 60%;
            height: 200%;
            background: radial-gradient(ellipse at center, rgba(183, 240, 74, 0.1) 0%, transparent 70%);
            pointer-events: none;
        }
        .cta-band h2 {
            font-size: 1.8rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 1;
        }
        .cta-band p {
            font-size: 15px;
            color: rgba(230, 240, 232, 0.78);
            margin-bottom: 28px;
            position: relative;
            z-index: 1;
            max-width: 520px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-band .btn {
            position: relative;
            z-index: 1;
        }

        /* 页脚 */
        .site-footer {
            background-color: var(--primary-dark);
            color: rgba(230, 240, 232, 0.75);
            padding: 60px 0 28px;
            margin-top: 0;
        }
        .site-footer .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .site-footer .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            color: rgba(230, 240, 232, 0.65);
            margin-top: 14px;
            max-width: 320px;
        }
        .site-footer h4 {
            font-size: 15px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
            letter-spacing: 0.03em;
        }
        .site-footer ul {
            list-style: none;
            padding: 0;
            margin: 0;
        }
        .site-footer ul li {
            margin-bottom: 10px;
        }
        .site-footer ul a {
            color: rgba(230, 240, 232, 0.65);
            font-size: 14px;
            transition: var(--transition);
        }
        .site-footer ul a:hover {
            color: var(--accent);
        }
        .site-footer .footer-bottom {
            border-top: 1px solid rgba(230, 240, 232, 0.15);
            padding-top: 22px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(230, 240, 232, 0.5);
        }
        .site-footer .footer-bottom a {
            color: rgba(230, 240, 232, 0.6);
        }
        .site-footer .footer-bottom a:hover {
            color: var(--accent);
        }

        /* 响应式 */
        @media (max-width: 1024px) {
            .news-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
                padding: 32px 28px;
            }
            .stat-divider {
                display: none;
            }
            .subscribe-box {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 36px 32px;
            }
            .featured-card {
                grid-template-columns: 1fr;
            }
            .featured-card .featured-img-wrap {
                min-height: 240px;
            }
            .featured-card .featured-content {
                padding: 28px 28px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-space: 52px;
                --header-height: 60px;
            }
            .site-header .container {
                flex-wrap: wrap;
                gap: 8px;
                padding: 0 16px;
            }
            .nav-cta {
                display: none;
            }
            .site-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: var(--primary-dark);
                flex-direction: column;
                align-items: flex-start;
                padding: 16px 24px;
                gap: 4px;
                box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
                border-top: 1px solid rgba(230, 240, 232, 0.15);
            }
            .site-nav.open {
                display: flex;
            }
            .site-nav a {
                width: 100%;
                padding: 12px 16px;
                font-size: 15px;
            }
            .site-nav a[aria-current="page"]::after {
                display: none;
            }
            .site-nav a[aria-current="page"] {
                background: rgba(183, 240, 74, 0.1);
            }
            .nav-toggle {
                display: flex;
            }
            .page-header {
                padding: 110px 0 44px;
            }
            .news-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .stats-strip {
                grid-template-columns: repeat(2, 1fr);
                gap: 18px;
                padding: 28px 20px;
            }
            .stats-strip .stat-num {
                font-size: 1.8rem;
            }
            .subscribe-box {
                padding: 28px 22px;
            }
            .subscribe-form {
                flex-direction: column;
            }
            .subscribe-form input[type="email"] {
                min-width: 100%;
            }
            .cta-band {
                padding: 36px 24px;
            }
            .cta-band h2 {
                font-size: 1.4rem;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 28px;
            }
            .site-footer .footer-brand {
                grid-column: 1 / -1;
            }
            .site-footer .footer-bottom {
                flex-direction: column;
                align-items: flex-start;
                gap: 6px;
            }
            .featured-card .featured-img-wrap {
                min-height: 200px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .section {
                padding: 44px 0;
            }
            .page-header h1 {
                font-size: 1.6rem;
            }
            .stats-strip {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
                padding: 24px 16px;
            }
            .stats-strip .stat-num {
                font-size: 1.5rem;
            }
            .stats-strip .stat-label {
                font-size: 12px;
            }
            .tag-cloud .tag-pill {
                padding: 6px 14px;
                font-size: 13px;
            }
            .site-footer .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .site-footer .footer-brand {
                grid-column: auto;
            }
        }