/* roulang page: index */
:root {
      --primary: #1E60D5;
      --primary-hover: #164bb0;
      --primary-light: #EBF3FF;
      --accent: #0091FF;
      --success: #10B981;
      --success-light: #E8FDF5;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-sub: #94A3B8;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --border-color: #E2E8F0;
      --card-shadow: 0 4px 20px -2px rgba(30, 96, 213, 0.06);
      --card-shadow-hover: 0 16px 32px -4px rgba(30, 96, 213, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition: all 0.28s ease-in-out;
    }

    /* Reset & Base */
    * { box-sizing: border-box; }
    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-light);
      color: var(--text-main);
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      font-size: 15px;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary); }
    img { max-width: 100%; height: auto; display: block; }

    /* Layout Containers */
    .grid-container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
    .site-section { padding: 80px 0; position: relative; }
    .site-section.alt-bg { background-color: var(--bg-white); }
    .section-head { margin-bottom: 48px; }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
      line-height: 1.75;
    }

    /* Modern Card */
    .app-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      height: 100%;
      position: relative;
    }
    .app-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(30, 96, 213, 0.3);
    }

    /* Buttons */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--primary);
      color: #fff !important;
      padding: 12px 28px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 15px;
      box-shadow: 0 4px 14px rgba(30, 96, 213, 0.35);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 20px rgba(30, 96, 213, 0.45);
      transform: translateY(-1px);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #FFFFFF;
      color: var(--text-main) !important;
      padding: 12px 28px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 15px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
      cursor: pointer;
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary) !important;
      background: var(--primary-light);
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-bar {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
    }
    .nav-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      font-size: 16px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-menu a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* Hero Section */
    .hero-section {
      padding: 70px 0 60px;
      background: radial-gradient(circle at 50% 20%, rgba(30, 96, 213, 0.07) 0%, rgba(248, 250, 252, 0) 70%);
      border-bottom: 1px solid var(--border-color);
    }
    .hero-nodes {
      display: flex;
      justify-content: center;
      gap: 12px;
      flex-wrap: wrap;
      margin-bottom: 24px;
    }
    .node-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-full);
      padding: 4px 14px;
      font-size: 12px;
      font-weight: 500;
      color: var(--text-muted);
    }
    .node-badge .dot {
      width: 7px;
      height: 7px;
      background: var(--success);
      border-radius: 50%;
      box-shadow: 0 0 6px var(--success);
    }
    .hero-h1 {
      font-size: 40px;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.25;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-lead {
      font-size: 16px;
      color: var(--text-muted);
      max-width: 820px;
      margin: 0 auto 36px;
      line-height: 1.8;
    }
    .hero-actions {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 40px;
    }
    .hero-indicator-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px 24px;
      box-shadow: var(--card-shadow);
      display: inline-flex;
      align-items: center;
      gap: 20px;
      text-align: left;
    }
    .indicator-item { display: flex; align-items: center; gap: 10px; }
    .indicator-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--primary-light);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
    }
    .indicator-label { font-size: 12px; color: var(--text-sub); margin: 0; line-height: 1.2; }
    .indicator-value { font-size: 14px; font-weight: 700; color: var(--text-main); margin: 0; }

    /* Performance Stats Banner */
    .stat-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px 20px;
      text-align: center;
      box-shadow: var(--card-shadow);
    }
    .stat-num {
      font-size: 32px;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 4px;
      font-family: Arial, sans-serif;
    }
    .stat-label {
      font-size: 13px;
      color: var(--text-muted);
      margin: 0;
      font-weight: 500;
    }

    /* Workflow & Steps */
    .step-box {
      position: relative;
      padding: 30px 24px;
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      box-shadow: var(--card-shadow);
      text-align: left;
    }
    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: var(--primary-light);
      color: var(--primary);
      font-weight: 700;
      font-size: 16px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }
    .step-title {
      font-size: 18px;
      font-weight: 700;
      margin-bottom: 10px;
      color: var(--text-main);
    }
    .step-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
      margin: 0;
    }

    /* Interactive Workbench */
    .workbench-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--card-shadow-hover);
    }
    .code-mock {
      background: #0F172A;
      border-radius: var(--radius-md);
      padding: 24px;
      color: #94A3B8;
      font-family: Menlo, Monaco, Consolas, monospace;
      font-size: 13px;
      line-height: 1.8;
      text-align: left;
    }
    .code-mock .keyword { color: #38BDF8; }
    .code-mock .string { color: #34D399; }
    .code-mock .prop { color: #F472B6; }

    /* Topic Matrix */
    .topic-card {
      background: var(--bg-white);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
    }
    .topic-card:hover {
      border-color: var(--primary);
      transform: translateY(-4px);
    }
    .badge-soft {
      display: inline-block;
      padding: 3px 10px;
      border-radius: var(--radius-sm);
      font-size: 12px;
      font-weight: 600;
      background: var(--primary-light);
      color: var(--primary);
      margin-bottom: 12px;
    }
    .meta-row {
      display: flex;
      align-items: center;
      justify-content: space-between;
      border-top: 1px dashed var(--border-color);
      padding-top: 14px;
      margin-top: 16px;
      font-size: 13px;
      color: var(--text-sub);
    }

    /* Comparison / Plan Cards */
    .plan-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      box-shadow: var(--card-shadow);
      position: relative;
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .plan-card.featured {
      border: 2px solid var(--primary);
      box-shadow: 0 12px 32px rgba(30, 96, 213, 0.15);
      transform: scale(1.02);
    }
    .plan-badge {
      position: absolute;
      top: -12px;
      right: 24px;
      background: var(--primary);
      color: #fff;
      font-size: 12px;
      font-weight: 700;
      padding: 2px 14px;
      border-radius: var(--radius-full);
    }
    .plan-title { font-size: 20px; font-weight: 700; margin-bottom: 8px; color: var(--text-main); }
    .plan-price { font-size: 32px; font-weight: 800; color: var(--primary); margin-bottom: 20px; }
    .plan-price span { font-size: 14px; color: var(--text-sub); font-weight: normal; }
    .plan-list { list-style: none; padding: 0; margin: 0 0 28px 0; text-align: left; flex-grow: 1; }
    .plan-list li {
      margin-bottom: 12px;
      font-size: 14px;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .plan-list li i { color: var(--success); }

    /* Testimonial Wall */
    .testimonial-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
      margin-bottom: 20px;
    }
    .testimonial-head {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }
    .avatar-mock {
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: #E2E8F0;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      font-weight: 700;
    }

    /* Accordion Custom */
    .accordion {
      border: none;
      background: transparent;
      margin: 0;
    }
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color) !important;
      border-radius: var(--radius-md) !important;
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .accordion-title {
      font-size: 16px;
      font-weight: 600;
      color: var(--text-main);
      padding: 18px 24px;
      background: #fff !important;
      border: none;
    }
    .accordion-title:hover {
      color: var(--primary);
      background: #FAFAFA !important;
    }
    .accordion-content {
      padding: 20px 24px;
      font-size: 14px;
      color: var(--text-muted);
      border-top: 1px solid var(--border-color);
      line-height: 1.75;
    }

    /* Article Card */
    .post-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .post-card:hover {
      transform: translateY(-3px);
      box-shadow: var(--card-shadow-hover);
      border-color: var(--primary);
    }
    .post-date { font-size: 12px; color: var(--text-sub); margin-bottom: 8px; }
    .post-title { font-size: 17px; font-weight: 700; color: var(--text-main); margin-bottom: 10px; line-height: 1.4; }
    .post-desc { font-size: 13px; color: var(--text-muted); line-height: 1.6; margin: 0; }

    /* CTA Section */
    .cta-banner {
      background: linear-gradient(135deg, #1E60D5 0%, #0091FF 100%);
      border-radius: var(--radius-lg);
      padding: 60px 40px;
      color: #fff;
      box-shadow: 0 20px 40px -10px rgba(30, 96, 213, 0.4);
    }
    .cta-banner h2 { color: #fff; font-size: 32px; font-weight: 800; margin-bottom: 16px; }
    .cta-banner p { color: rgba(255, 255, 255, 0.9); font-size: 16px; max-width: 680px; margin: 0 auto 28px; line-height: 1.7; }

    /* Footer */
    .site-footer {
      background: #FFFFFF;
      border-top: 1px solid var(--border-color);
      padding: 60px 0 30px;
      font-size: 14px;
      color: var(--text-muted);
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 18px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-top: 40px;
      font-size: 13px;
      color: var(--text-sub);
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* Mobile Responsive Custom */
    @media (max-width: 1024px) {
      .hero-h1 { font-size: 32px; }
      .section-title { font-size: 26px; }
    }
    @media (max-width: 640px) {
      .hero-section { padding: 40px 0; }
      .hero-h1 { font-size: 26px; }
      .site-section { padding: 50px 0; }
      .nav-menu { display: none; }
      .hero-indicator-card { flex-direction: column; align-items: flex-start; gap: 12px; width: 100%; }
      .cta-banner { padding: 36px 20px; }
      .footer-bottom { flex-direction: column; text-align: center; }
    }

/* roulang page: category1 */
:root {
      --primary: #1E60D5;
      --primary-hover: #164bb0;
      --primary-light: #EBF3FF;
      --accent: #0091FF;
      --success: #10B981;
      --success-light: #E8FDF5;
      --text-main: #0F172A;
      --text-muted: #475569;
      --text-sub: #94A3B8;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --border-color: #E2E8F0;
      --card-shadow: 0 4px 20px -2px rgba(30, 96, 213, 0.06);
      --card-shadow-hover: 0 16px 32px -4px rgba(30, 96, 213, 0.12);
      --radius-sm: 8px;
      --radius-md: 12px;
      --radius-lg: 16px;
      --radius-full: 9999px;
      --transition: all 0.28s ease-in-out;
    }

    body {
      margin: 0;
      padding: 0;
      background-color: var(--bg-light);
      color: var(--text-main);
      font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
      font-size: 15px;
      line-height: 1.7;
      -webkit-font-smoothing: antialiased;
    }

    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary); }
    img { max-width: 100%; height: auto; display: block; }

    /* Layout Containers */
    .grid-container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
    .site-section { padding: 80px 0; position: relative; }
    .site-section.alt-bg { background-color: var(--bg-white); }
    .section-head { margin-bottom: 48px; }
    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 4px 14px;
      background: var(--primary-light);
      color: var(--primary);
      border-radius: var(--radius-full);
      font-size: 13px;
      font-weight: 600;
      margin-bottom: 12px;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 30px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 14px;
      line-height: 1.35;
    }
    .section-desc {
      font-size: 15px;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto;
      line-height: 1.75;
    }

    /* Header Nav */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 999;
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
    }
    .nav-bar {
      height: 72px;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      font-size: 20px;
      font-weight: 700;
      color: var(--primary);
    }
    .nav-logo-icon {
      width: 36px;
      height: 36px;
      background: linear-gradient(135deg, var(--primary), var(--accent));
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: 10px;
      font-size: 16px;
    }
    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .nav-menu a {
      font-size: 14px;
      font-weight: 500;
      color: var(--text-muted);
    }
    .nav-menu a:hover, .nav-menu a.active {
      color: var(--primary);
      font-weight: 600;
    }
    .nav-cta {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* Buttons */
    .btn-primary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--primary);
      color: #fff !important;
      padding: 12px 28px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 15px;
      box-shadow: 0 4px 14px rgba(30, 96, 213, 0.35);
      transition: var(--transition);
      cursor: pointer;
      border: 1px solid transparent;
    }
    .btn-primary:hover {
      background: var(--primary-hover);
      box-shadow: 0 6px 20px rgba(30, 96, 213, 0.45);
      transform: translateY(-1px);
    }
    .btn-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: #FFFFFF;
      color: var(--text-main) !important;
      padding: 12px 28px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 15px;
      border: 1px solid var(--border-color);
      transition: var(--transition);
      cursor: pointer;
    }
    .btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary) !important;
      background: var(--primary-light);
    }
    .btn-sm {
      padding: 6px 16px;
      font-size: 13px;
    }

    /* Bento Hero Style for Category */
    .category-hero {
      padding: 56px 0 40px;
      background: #FFFFFF;
      border-bottom: 1px solid var(--border-color);
    }
    .bento-grid {
      display: grid;
      grid-template-columns: 2fr 1fr;
      gap: 20px;
    }
    .bento-main {
      background: linear-gradient(145deg, #FFFFFF, #F1F6FD);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 36px 40px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--card-shadow);
    }
    .bento-side-stack {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .bento-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
    }
    .bento-card:hover {
      border-color: rgba(30, 96, 213, 0.3);
      transform: translateY(-2px);
    }
    .bento-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary-light);
      color: var(--primary);
      padding: 4px 12px;
      border-radius: var(--radius-full);
      font-size: 12px;
      font-weight: 600;
      margin-bottom: 12px;
    }
    .hero-h1 {
      font-size: 32px;
      font-weight: 700;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .hero-p {
      font-size: 15px;
      color: var(--text-muted);
      margin-bottom: 24px;
      line-height: 1.7;
    }
    .bento-stats {
      display: flex;
      align-items: baseline;
      gap: 8px;
      margin-top: 6px;
    }
    .bento-stats .number {
      font-size: 28px;
      font-weight: 800;
      color: var(--primary);
    }
    .bento-stats .label {
      font-size: 13px;
      color: var(--text-sub);
    }

    /* Filter Panel */
    .filter-panel {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 24px 30px;
      box-shadow: var(--card-shadow);
    }
    .filter-row {
      display: flex;
      align-items: center;
      gap: 16px;
      padding: 10px 0;
      border-bottom: 1px dashed var(--border-color);
    }
    .filter-row:last-child {
      border-bottom: none;
      padding-bottom: 0;
    }
    .filter-title {
      font-size: 13px;
      font-weight: 600;
      color: var(--text-muted);
      width: 80px;
      flex-shrink: 0;
    }
    .filter-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
    }
    .filter-tag {
      display: inline-block;
      padding: 4px 14px;
      border-radius: var(--radius-full);
      font-size: 13px;
      color: var(--text-muted);
      background: var(--bg-light);
      border: 1px solid transparent;
      cursor: pointer;
      transition: var(--transition);
    }
    .filter-tag:hover {
      color: var(--primary);
      border-color: rgba(30, 96, 213, 0.3);
    }
    .filter-tag.active {
      background: var(--primary);
      color: #FFFFFF;
      font-weight: 500;
    }

    /* Resource Cards */
    .resource-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--card-shadow);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
      height: 100%;
    }
    .resource-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--card-shadow-hover);
      border-color: rgba(30, 96, 213, 0.35);
    }
    .resource-header {
      padding: 20px 22px 14px;
      border-bottom: 1px solid #F1F5F9;
      display: flex;
      align-items: flex-start;
      justify-content: space-between;
    }
    .resource-badge {
      display: inline-block;
      padding: 3px 10px;
      border-radius: var(--radius-full);
      font-size: 12px;
      font-weight: 600;
    }
    .badge-blue { background: var(--primary-light); color: var(--primary); }
    .badge-green { background: var(--success-light); color: var(--success); }
    .resource-body {
      padding: 20px 22px;
      flex-grow: 1;
    }
    .resource-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
      line-height: 1.4;
    }
    .resource-desc {
      font-size: 13px;
      color: var(--text-muted);
      margin-bottom: 16px;
      line-height: 1.65;
    }
    .resource-meta {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 8px;
      font-size: 12px;
      color: var(--text-sub);
      background: var(--bg-light);
      padding: 10px 14px;
      border-radius: var(--radius-sm);
    }
    .resource-footer {
      padding: 14px 22px;
      border-top: 1px solid #F1F5F9;
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: #FAFCFF;
    }
    .res-status-dot {
      display: inline-block;
      width: 7px;
      height: 7px;
      border-radius: 50%;
      background: var(--success);
      margin-right: 6px;
    }

    /* Spotlight Big Cards */
    .spotlight-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 30px;
      box-shadow: var(--card-shadow);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      height: 100%;
      border-left: 4px solid var(--primary);
    }
    .spotlight-score {
      font-size: 26px;
      font-weight: 800;
      color: var(--primary);
    }

    /* Specs Benchmark Table */
    .specs-table {
      width: 100%;
      border-collapse: separate;
      border-spacing: 0;
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      overflow: hidden;
      box-shadow: var(--card-shadow);
    }
    .specs-table th {
      background: #F8FAFC;
      padding: 16px 20px;
      font-size: 14px;
      font-weight: 600;
      color: var(--text-main);
      border-bottom: 1px solid var(--border-color);
      text-align: left;
    }
    .specs-table td {
      padding: 18px 20px;
      font-size: 14px;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border-color);
    }
    .specs-table tr:last-child td {
      border-bottom: none;
    }
    .specs-table tr:hover td {
      background: #F9FBFE;
    }

    /* Mount Steps */
    .step-card {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 28px;
      position: relative;
      box-shadow: var(--card-shadow);
      height: 100%;
    }
    .step-number {
      width: 42px;
      height: 42px;
      border-radius: 12px;
      background: var(--primary-light);
      color: var(--primary);
      font-size: 18px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }
    .step-title {
      font-size: 17px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .step-desc {
      font-size: 14px;
      color: var(--text-muted);
      line-height: 1.65;
    }

    /* Category FAQ Accordion */
    .accordion-item {
      background: #FFFFFF;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md) !important;
      margin-bottom: 14px;
      overflow: hidden;
    }
    .accordion-title {
      font-size: 16px !important;
      font-weight: 600 !important;
      color: var(--text-main) !important;
      padding: 18px 24px !important;
      border: none !important;
      background: #FFFFFF !important;
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .accordion-title:hover {
      background: #F8FAFC !important;
      color: var(--primary) !important;
    }
    .accordion-content {
      padding: 16px 24px 22px !important;
      font-size: 14px !important;
      color: var(--text-muted) !important;
      line-height: 1.75 !important;
      border-top: 1px solid #F1F5F9 !important;
    }

    /* Bottom CTA Card */
    .cta-card {
      background: linear-gradient(135deg, #1E60D5, #0091FF);
      border-radius: var(--radius-lg);
      padding: 48px;
      color: #FFFFFF;
      text-align: center;
      box-shadow: 0 16px 36px -6px rgba(30, 96, 213, 0.35);
    }
    .cta-card h3 {
      color: #FFFFFF;
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 12px;
    }
    .cta-card p {
      font-size: 16px;
      color: rgba(255, 255, 255, 0.9);
      max-width: 650px;
      margin: 0 auto 28px;
      line-height: 1.7;
    }

    /* Footer */
    .site-footer {
      background: #0B1120;
      color: #94A3B8;
      padding: 64px 0 32px;
      border-top: 1px solid #1E293B;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 600;
      color: #F8FAFC;
      margin-bottom: 20px;
    }
    .footer-links {
      list-style: none;
      margin: 0;
      padding: 0;
    }
    .footer-links li {
      margin-bottom: 10px;
      font-size: 13px;
    }
    .footer-links a {
      color: #94A3B8;
    }
    .footer-links a:hover {
      color: #FFFFFF;
    }
    .footer-bottom {
      margin-top: 48px;
      padding-top: 24px;
      border-top: 1px solid #1E293B;
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 12px;
      color: #64748B;
      flex-wrap: wrap;
      gap: 12px;
    }

    /* Responsive */
    @media screen and (max-width: 1024px) {
      .bento-grid { grid-template-columns: 1fr; }
      .nav-menu { display: none; }
    }
    @media screen and (max-width: 640px) {
      .hero-h1 { font-size: 24px; }
      .section-title { font-size: 24px; }
      .filter-row { flex-direction: column; align-items: flex-start; gap: 8px; }
      .specs-table { display: block; overflow-x: auto; }
      .footer-bottom { flex-direction: column; align-items: flex-start; }
    }

/* roulang page: category2 */
:root {
        --primary: #1E60D5;
        --primary-hover: #164bb0;
        --primary-light: #EBF3FF;
        --accent: #0091FF;
        --success: #10B981;
        --success-light: #E8FDF5;
        --text-main: #0F172A;
        --text-muted: #475569;
        --text-sub: #94A3B8;
        --bg-light: #F8FAFC;
        --bg-white: #FFFFFF;
        --border-color: #E2E8F0;
        --card-shadow: 0 4px 20px -2px rgba(30, 96, 213, 0.06);
        --card-shadow-hover: 0 16px 32px -4px rgba(30, 96, 213, 0.12);
        --radius-sm: 8px;
        --radius-md: 12px;
        --radius-lg: 16px;
        --radius-full: 9999px;
        --transition: all 0.28s ease-in-out;
    }
    body {
        margin: 0;
        padding: 0;
        background-color: var(--bg-light);
        color: var(--text-main);
        font-family: -apple-system, "PingFang SC", "Microsoft YaHei", "Heiti SC", sans-serif;
        font-size: 15px;
        line-height: 1.7;
        -webkit-font-smoothing: antialiased;
    }
    a { color: inherit; text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--primary); }
    img { max-width: 100%; height: auto; display: block; }
    
    .grid-container { max-width: 1200px; padding-left: 20px; padding-right: 20px; }
    .site-section { padding: 80px 0; position: relative; }
    .site-section.alt-bg { background-color: var(--bg-white); }
    .section-head { margin-bottom: 48px; }
    .section-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 4px 14px;
        background: var(--primary-light);
        color: var(--primary);
        border-radius: var(--radius-full);
        font-size: 13px;
        font-weight: 600;
        margin-bottom: 12px;
        letter-spacing: 0.5px;
    }
    .section-title {
        font-size: 28px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 14px;
        line-height: 1.35;
    }
    .section-desc {
        font-size: 15px;
        color: var(--text-muted);
        max-width: 760px;
        margin: 0 auto;
        line-height: 1.75;
    }
    
    .app-card {
        background: var(--bg-white);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 28px;
        box-shadow: var(--card-shadow);
        transition: var(--transition);
        height: 100%;
        position: relative;
    }
    .app-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--card-shadow-hover);
        border-color: rgba(30, 96, 213, 0.3);
    }
    
    .btn-primary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        background: var(--primary);
        color: #fff !important;
        padding: 12px 28px;
        border-radius: var(--radius-full);
        font-weight: 600;
        font-size: 15px;
        box-shadow: 0 4px 14px rgba(30, 96, 213, 0.35);
        transition: var(--transition);
        cursor: pointer;
        border: 1px solid transparent;
    }
    .btn-primary:hover {
        background: var(--primary-hover);
        box-shadow: 0 6px 20px rgba(30, 96, 213, 0.45);
        transform: translateY(-1px);
    }
    .btn-secondary {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        background: #FFFFFF;
        color: var(--text-main) !important;
        padding: 12px 28px;
        border-radius: var(--radius-full);
        font-weight: 600;
        font-size: 15px;
        border: 1px solid var(--border-color);
        transition: var(--transition);
        cursor: pointer;
    }
    .btn-secondary:hover {
        border-color: var(--primary);
        color: var(--primary) !important;
        background: var(--primary-light);
    }
    
    .site-header {
        position: sticky;
        top: 0;
        z-index: 999;
        background: rgba(255, 255, 255, 0.94);
        backdrop-filter: blur(10px);
        border-bottom: 1px solid var(--border-color);
    }
    .nav-bar {
        height: 72px;
        display: flex;
        align-items: center;
        justify-content: space-between;
    }
    .nav-logo {
        display: flex;
        align-items: center;
        gap: 10px;
        font-size: 20px;
        font-weight: 700;
        color: var(--primary);
    }
    .nav-logo-icon {
        width: 36px;
        height: 36px;
        background: linear-gradient(135deg, var(--primary), var(--accent));
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 10px;
        font-size: 16px;
    }
    .nav-menu {
        display: flex;
        align-items: center;
        gap: 28px;
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .nav-menu a {
        font-size: 14px;
        font-weight: 500;
        color: var(--text-muted);
    }
    .nav-menu a:hover, .nav-menu a.active {
        color: var(--primary);
        font-weight: 600;
    }
    .nav-cta {
        display: flex;
        align-items: center;
        gap: 12px;
    }
    
    /* Category Header Banner */
    .category-banner {
        padding: 60px 0 50px;
        background: linear-gradient(180deg, #F0F6FF 0%, #F8FAFC 100%);
        border-bottom: 1px solid var(--border-color);
    }
    .category-crumbs {
        display: flex;
        align-items: center;
        gap: 8px;
        font-size: 13px;
        color: var(--text-sub);
        margin-bottom: 16px;
    }
    .category-h1 {
        font-size: 34px;
        font-weight: 800;
        color: var(--text-main);
        line-height: 1.3;
        margin-bottom: 14px;
        letter-spacing: -0.5px;
    }
    .category-lead {
        font-size: 16px;
        color: var(--text-muted);
        line-height: 1.8;
        max-width: 880px;
        margin-bottom: 24px;
    }
    .stats-chip-group {
        display: flex;
        flex-wrap: wrap;
        gap: 14px;
    }
    .stats-chip {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        background: var(--bg-white);
        border: 1px solid var(--border-color);
        padding: 6px 16px;
        border-radius: var(--radius-full);
        font-size: 13px;
        color: var(--text-muted);
        box-shadow: 0 2px 8px rgba(0,0,0,0.02);
    }
    .stats-chip strong {
        color: var(--primary);
        font-weight: 700;
    }

    /* Filter Toolbar */
    .filter-panel {
        background: var(--bg-white);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 24px;
        box-shadow: var(--card-shadow);
        margin-top: -30px;
        position: relative;
        z-index: 10;
        margin-bottom: 40px;
    }
    .filter-row {
        display: flex;
        align-items: center;
        padding: 10px 0;
        border-bottom: 1px dashed var(--border-color);
    }
    .filter-row:last-child {
        border-bottom: none;
        padding-bottom: 0;
    }
    .filter-row:first-child {
        padding-top: 0;
    }
    .filter-label {
        width: 100px;
        font-size: 13px;
        font-weight: 600;
        color: var(--text-sub);
        display: flex;
        align-items: center;
        gap: 6px;
    }
    .filter-options {
        display: flex;
        flex-wrap: wrap;
        gap: 8px;
        flex: 1;
    }
    .filter-btn {
        padding: 4px 14px;
        border-radius: var(--radius-full);
        font-size: 13px;
        font-weight: 500;
        color: var(--text-muted);
        border: 1px solid transparent;
        background: transparent;
        cursor: pointer;
        transition: var(--transition);
    }
    .filter-btn:hover {
        background: var(--primary-light);
        color: var(--primary);
    }
    .filter-btn.active {
        background: var(--primary);
        color: #fff;
        font-weight: 600;
    }

    /* Resource Media Card */
    .media-card {
        background: var(--bg-white);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        overflow: hidden;
        transition: var(--transition);
        display: flex;
        flex-direction: column;
        height: 100%;
        box-shadow: var(--card-shadow);
    }
    .media-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--card-shadow-hover);
        border-color: rgba(30, 96, 213, 0.3);
    }
    .media-thumb-box {
        height: 160px;
        background: linear-gradient(135deg, #1E293B, #0F172A);
        position: relative;
        padding: 16px;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        color: #fff;
    }
    .media-badges {
        display: flex;
        justify-content: space-between;
        align-items: flex-start;
    }
    .badge-resolution {
        background: rgba(30, 96, 213, 0.9);
        color: #fff;
        padding: 3px 8px;
        border-radius: var(--radius-sm);
        font-size: 11px;
        font-weight: 700;
        letter-spacing: 0.5px;
    }
    .badge-codec {
        background: rgba(16, 185, 129, 0.9);
        color: #fff;
        padding: 3px 8px;
        border-radius: var(--radius-sm);
        font-size: 11px;
        font-weight: 600;
    }
    .media-meta-spec {
        font-size: 12px;
        color: #94A3B8;
        display: flex;
        align-items: center;
        gap: 12px;
    }
    .media-body {
        padding: 20px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }
    .media-title {
        font-size: 16px;
        font-weight: 700;
        color: var(--text-main);
        line-height: 1.45;
        margin-bottom: 10px;
    }
    .media-desc {
        font-size: 13px;
        color: var(--text-muted);
        line-height: 1.65;
        margin-bottom: 16px;
        flex: 1;
    }
    .media-info-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
        padding: 12px;
        background: var(--bg-light);
        border-radius: var(--radius-sm);
        margin-bottom: 16px;
        font-size: 12px;
    }
    .info-item {
        color: var(--text-sub);
    }
    .info-item span {
        color: var(--text-main);
        font-weight: 600;
    }
    .media-footer {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding-top: 14px;
        border-top: 1px solid var(--border-color);
    }
    .file-size-tag {
        font-size: 12px;
        color: var(--text-sub);
        font-weight: 500;
    }
    .btn-download-sm {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        padding: 6px 14px;
        background: var(--primary-light);
        color: var(--primary);
        font-weight: 600;
        font-size: 13px;
        border-radius: var(--radius-full);
        transition: var(--transition);
    }
    .btn-download-sm:hover {
        background: var(--primary);
        color: #fff;
    }

    /* Spotlight Section */
    .spotlight-card {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        padding: 32px;
        box-shadow: var(--card-shadow);
        height: 100%;
        display: flex;
        flex-direction: column;
        justify-content: space-between;
        border-left: 4px solid var(--primary);
    }
    .spotlight-top {
        margin-bottom: 20px;
    }
    .spotlight-tag {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        background: var(--success-light);
        color: var(--success);
        font-size: 12px;
        font-weight: 700;
        padding: 4px 10px;
        border-radius: var(--radius-sm);
        margin-bottom: 12px;
    }
    .spotlight-title {
        font-size: 20px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 10px;
        line-height: 1.4;
    }
    .spotlight-desc {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.7;
    }
    .spotlight-metrics {
        display: flex;
        gap: 20px;
        padding: 16px 0;
        margin: 16px 0;
        border-top: 1px solid var(--border-color);
        border-bottom: 1px solid var(--border-color);
    }
    .spotlight-metric-item {
        font-size: 12px;
        color: var(--text-sub);
    }
    .spotlight-metric-item strong {
        display: block;
        font-size: 16px;
        color: var(--text-main);
        font-weight: 700;
        margin-top: 2px;
    }

    /* Comparison Table */
    .spec-table-container {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-lg);
        overflow: hidden;
        box-shadow: var(--card-shadow);
    }
    .custom-table {
        width: 100%;
        border-collapse: collapse;
        text-align: left;
        margin-bottom: 0;
    }
    .custom-table th {
        background: #F8FAFC;
        padding: 16px 20px;
        font-size: 13px;
        font-weight: 700;
        color: var(--text-main);
        border-bottom: 1px solid var(--border-color);
    }
    .custom-table td {
        padding: 18px 20px;
        font-size: 14px;
        color: var(--text-muted);
        border-bottom: 1px solid var(--border-color);
        vertical-align: middle;
    }
    .custom-table tr:last-child td {
        border-bottom: none;
    }
    .format-badge {
        display: inline-block;
        font-size: 12px;
        font-weight: 600;
        color: var(--primary);
        background: var(--primary-light);
        padding: 2px 8px;
        border-radius: 4px;
    }

    /* Workflow Steps */
    .workflow-card {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 28px;
        height: 100%;
        position: relative;
        box-shadow: var(--card-shadow);
    }
    .step-number {
        width: 36px;
        height: 36px;
        border-radius: 50%;
        background: var(--primary-light);
        color: var(--primary);
        display: flex;
        align-items: center;
        justify-content: center;
        font-weight: 800;
        font-size: 16px;
        margin-bottom: 16px;
    }
    .workflow-title {
        font-size: 17px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 10px;
    }
    .workflow-desc {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.65;
    }

    /* FAQ Box */
    .faq-item {
        background: #fff;
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        padding: 24px;
        margin-bottom: 16px;
        box-shadow: var(--card-shadow);
    }
    .faq-q {
        font-size: 16px;
        font-weight: 700;
        color: var(--text-main);
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 10px;
    }
    .faq-q i {
        color: var(--primary);
    }
    .faq-a {
        font-size: 14px;
        color: var(--text-muted);
        line-height: 1.75;
        padding-left: 28px;
    }

    /* Conversion CTA Box */
    .cta-box {
        background: linear-gradient(135deg, #1E60D5 0%, #0091FF 100%);
        border-radius: var(--radius-lg);
        padding: 48px;
        color: #fff;
        box-shadow: 0 12px 30px rgba(30, 96, 213, 0.25);
        text-align: center;
    }
    .cta-box h3 {
        color: #fff;
        font-size: 26px;
        font-weight: 700;
        margin-bottom: 14px;
    }
    .cta-box p {
        color: rgba(255, 255, 255, 0.88);
        font-size: 15px;
        max-width: 640px;
        margin: 0 auto 28px;
        line-height: 1.7;
    }

    /* Pagination */
    .pagination-bar {
        margin-top: 36px;
        display: flex;
        justify-content: center;
        gap: 8px;
    }
    .page-btn {
        min-width: 40px;
        height: 40px;
        display: inline-flex;
        align-items: center;
        justify-content: center;
        border-radius: var(--radius-sm);
        border: 1px solid var(--border-color);
        background: #fff;
        font-size: 14px;
        font-weight: 600;
        color: var(--text-muted);
        transition: var(--transition);
    }
    .page-btn:hover {
        border-color: var(--primary);
        color: var(--primary);
    }
    .page-btn.active {
        background: var(--primary);
        border-color: var(--primary);
        color: #fff;
    }

    /* Footer */
    .site-footer {
        background: #FFFFFF;
        border-top: 1px solid var(--border-color);
        padding: 60px 0 24px;
        margin-top: 60px;
    }
    .footer-col-title {
        font-size: 15px;
        font-weight: 700;
        color: var(--text-main);
        margin-bottom: 16px;
    }
    .footer-links {
        list-style: none;
        margin: 0;
        padding: 0;
    }
    .footer-links li {
        margin-bottom: 10px;
    }
    .footer-links a {
        font-size: 13px;
        color: var(--text-muted);
    }
    .footer-links a:hover {
        color: var(--primary);
    }
    .footer-bottom {
        border-top: 1px solid var(--border-color);
        margin-top: 40px;
        padding-top: 24px;
        display: flex;
        justify-content: space-between;
        align-items: center;
        font-size: 12px;
        color: var(--text-sub);
        flex-wrap: wrap;
        gap: 12px;
    }

    @media (max-width: 1024px) {
        .nav-menu { gap: 16px; }
        .hero-h1, .category-h1 { font-size: 28px; }
    }
    @media (max-width: 768px) {
        .nav-menu { display: none; }
        .category-h1 { font-size: 24px; }
        .filter-row { flex-direction: column; align-items: flex-start; gap: 8px; }
        .filter-label { width: 100%; }
        .cta-box { padding: 32px 20px; }
        .spotlight-metrics { flex-direction: column; gap: 10px; }
    }