/* roulang page: index */
:root {
    --primary: #3563e9;
    --primary-dark: #1e40af;
    --primary-deep: #0d1b3e;
    --accent: #f59e0b;
    --bg-light: #f6f8fc;
    --bg-white: #ffffff;
    --text-main: #0f172a;
    --text-body: #334155;
    --text-muted: #64748b;
    --border-color: #e2e8f0;
    --radius-standard: 1rem;
    --radius-lg: 1.5rem;
    --shadow-standard: 0 10px 30px rgba(15, 23, 42, 0.08);
    --shadow-hover: 0 18px 40px rgba(15, 23, 42, 0.12);
    --transition-base: 0.3s ease;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-light);
    color: var(--text-body);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }

  img {
    max-width: 100%;
    display: block;
  }

  a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.25s ease;
  }

  a:hover {
    color: var(--primary-dark);
  }

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

  input, textarea {
    font-family: inherit;
  }

  .container-roulang {
    max-width: 1400px;
    margin: 0 auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
  }

  .text-balance {
    text-wrap: balance;
  }

  .hero-overlay {
    position: relative;
    background-image: linear-gradient(135deg, rgba(13, 27, 62, 0.92) 0%, rgba(30, 64, 175, 0.78) 55%, rgba(53, 99, 233, 0.65) 100%), url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
  }

  .section-title {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    color: var(--text-main);
    line-height: 1.3;
  }

  .section-subtitle {
    color: var(--text-muted);
    margin-top: 0.65rem;
    font-size: 1.05rem;
  }

  .badge-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.25rem 0.8rem;
    background-color: var(--primary-50, #eef4ff);
    color: var(--primary-dark);
    border-radius: 9999px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    border: 1px solid rgba(53, 99, 233, 0.12);
  }

  .nav-link-item {
    position: relative;
    display: block;
    padding: 0.7rem 1.25rem;
    border-radius: 0.75rem;
    font-weight: 600;
    color: var(--text-body);
    transition: all 0.25s ease;
    font-size: 0.95rem;
  }

  .nav-link-item:hover {
    background-color: rgba(53, 99, 233, 0.06);
    color: var(--primary-dark);
    transform: translateX(4px);
  }

  .nav-link-item.active {
    background: linear-gradient(135deg, rgba(53, 99, 233, 0.12), rgba(30, 64, 175, 0.08));
    color: var(--primary-dark);
    font-weight: 700;
    box-shadow: inset 3px 0 0 var(--primary);
  }

  .btn-primary-rou {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    color: #fff;
    border-radius: 9999px;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 4px 14px rgba(53, 99, 233, 0.35);
    transition: all 0.3s ease;
    letter-spacing: 0.01em;
  }

  .btn-primary-rou:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 10px 24px rgba(53, 99, 233, 0.45);
    color: #fff;
  }

  .btn-outline-rou {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.8rem 2rem;
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, 0.7);
    border-radius: 9999px;
    font-weight: 600;
    font-size: 1rem;
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
  }

  .btn-outline-rou:hover {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    transform: translateY(-2px);
    border-color: #fff;
  }

  .card-rou {
    background: var(--bg-white);
    border-radius: var(--radius-standard);
    box-shadow: var(--shadow-standard);
    border: 1px solid rgba(226, 232, 240, 0.6);
    transition: all 0.35s ease;
    overflow: hidden;
  }

  .card-rou:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(53, 99, 233, 0.2);
  }

  .faq-item {
    background-color: #fff;
    border: 1px solid var(--border-color);
    border-radius: 1rem;
    padding: 1.25rem 1.5rem;
    transition: all 0.3s ease;
  }

  .faq-item:hover {
    border-color: rgba(53, 99, 233, 0.35);
    box-shadow: var(--shadow-standard);
  }

  .cta-section {
    background-image: linear-gradient(120deg, rgba(13, 27, 62, 0.94), rgba(30, 64, 175, 0.85)), url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
  }

  .footer-rou {
    background-color: #0f172a;
    color: #94a3b8;
  }

  .footer-rou a {
    color: #94a3b8;
  }

  .footer-rou a:hover {
    color: #ffffff;
  }

  .footer-title {
    color: #e2e8f0;
    font-weight: 700;
  }

  .hot-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: rgba(245, 158, 11, 0.95);
    color: #78350f;
    padding: 0.2rem 0.9rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 800;
    letter-spacing: 0.04em;
    box-shadow: 0 2px 8px rgba(245, 158, 11, 0.4);
    backdrop-filter: blur(4px);
    z-index: 5;
  }

  .rank-number {
    width: 2.25rem;
    height: 2.25rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 0.6rem;
    background: linear-gradient(135deg, #eef4ff, #e2e8f0);
    color: var(--primary-dark);
    font-weight: 800;
    font-size: 1rem;
  }

  .rank-number.top {
    background: linear-gradient(135deg, #f59e0b, #fbbf24);
    color: #1e293b;
  }

  .mobile-menu {
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background: #fff;
    z-index: 80;
    padding: 2rem 1.5rem;
    transition: right 0.35s ease;
    box-shadow: -10px 0 40px rgba(0,0,0,0.1);
    overflow-y: auto;
  }

  .mobile-menu.open {
    right: 0;
  }

  .menu-overlay-rou {
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.6);
    z-index: 70;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
  }

  .menu-overlay-rou.active {
    opacity: 1;
    visibility: visible;
  }

  .cover-gradient {
    background: linear-gradient(180deg, rgba(15, 23, 42, 0.1), rgba(15, 23, 42, 0.85));
  }

  .hero-stat-number {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.2;
    color: #fff;
    letter-spacing: -0.02em;
  }

  .hero-stat-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
  }

  .vertical-nav-desktop {
    width: 260px;
    min-width: 260px;
    height: 100vh;
    position: sticky;
    top: 0;
    display: flex;
    flex-direction: column;
    background: #ffffff;
    border-right: 1px solid var(--border-color);
    padding: 1.75rem 1.25rem;
    overflow-y: auto;
    z-index: 40;
  }

  .vertical-nav-bg {
    background: linear-gradient(180deg, #ffffff 0%, #f8fafc 100%);
  }

  @media (max-width: 1024px) {
    .vertical-nav-desktop {
      display: none;
    }
    .mobile-header {
      display: flex !important;
    }
    .main-with-sidebar {
      padding-left: 0 !important;
    }
  }

  @media (min-width: 1025px) {
    .mobile-header {
      display: none !important;
    }
  }

  .main-with-sidebar {
    flex: 1;
    min-width: 0;
  }

  .link-card-cover {
    height: 180px;
    background-size: cover;
    background-position: center;
    position: relative;
  }

  @media (max-width: 768px) {
    .section-title {
      font-size: 1.6rem;
    }
    .hero-stat-number {
      font-size: 1.5rem;
    }
    .container-roulang {
      padding-left: 1rem;
      padding-right: 1rem;
    }
  }

  @media (max-width: 520px) {
    body {
      font-size: 15px;
    }
    .link-card-cover {
      height: 150px;
    }
    .section-title {
      font-size: 1.4rem;
    }
  }

  ::selection {
    background-color: rgba(53, 99, 233, 0.2);
    color: var(--primary-deep);
  }

  .skip-to-content:focus {
    position: fixed;
    top: 1rem;
    left: 1rem;
    background: var(--primary);
    color: #fff;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    z-index: 999;
  }

/* roulang page: category1 */
:root {
    --brand: #1e3a5f;
    --brand-light: #2d5a8e;
    --brand-dark: #132a45;
    --accent: #ff6b35;
    --accent-light: #ff8a5c;
    --accent-dark: #e6541c;
    --bg: #f5f7fa;
    --card: #ffffff;
    --text: #1e293b;
    --text-weak: #64748b;
    --border: #e2e8f0;
    --radius-lg: 18px;
    --radius-md: 12px;
    --radius-sm: 8px;
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
    --shadow-md: 0 6px 18px rgba(15, 23, 42, 0.07);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, 0.10);
    --nav-width: 280px;
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: var(--font-sans);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
  }

  img {
    max-width: 100%;
    display: block;
  }

  a {
    color: inherit;
    text-decoration: none;
  }

  button {
    cursor: pointer;
    font-family: inherit;
  }

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

  .container-roulang {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }

  /* ===== 左侧导航 ===== */
  .sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--nav-width);
    height: 100vh;
    background: linear-gradient(180deg, #132a45 0%, #0d1e33 100%);
    display: flex;
    flex-direction: column;
    padding: 1.8rem 1.4rem 1.4rem;
    z-index: 60;
    border-right: 1px solid rgba(255, 255, 255, 0.06);
  }

  .sidebar-logo {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0 0.4rem 1.6rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    margin-bottom: 1.4rem;
  }

  .logo-badge {
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent) 0%, #ff8a5c 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    font-weight: 800;
    color: #fff;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.35);
    flex-shrink: 0;
  }

  .sidebar-logo span.logo-text {
    color: #fff;
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: 0.01em;
    line-height: 1.3;
  }

  .sidebar-nav-title {
    padding: 0 0.4rem;
    margin-bottom: 0.8rem;
    font-size: 0.72rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.35);
  }

  .nav-link-item {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.75rem 0.8rem;
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.75);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s ease;
    margin-bottom: 0.2rem;
  }

  .nav-link-item .nav-icon {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
    opacity: 0.75;
    transition: opacity 0.2s;
  }

  .nav-link-item:hover {
    background: rgba(255, 255, 255, 0.06);
    color: #fff;
  }

  .nav-link-item:hover .nav-icon {
    opacity: 1;
  }

  .nav-link-item.active {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    box-shadow: inset 3px 0 0 var(--accent);
  }

  .nav-link-item.active .nav-icon {
    color: var(--accent);
    opacity: 1;
  }

  .nav-link-item.active:hover {
    background: rgba(255, 255, 255, 0.14);
  }

  .sidebar-footer {
    margin-top: auto;
    padding: 1rem 0.4rem 0;
    border-top: 1px solid rgba(255, 255, 255, 0.06);
  }

  .sidebar-footer p {
    color: rgba(255, 255, 255, 0.35);
    font-size: 0.75rem;
    line-height: 1.6;
  }

  .sidebar-footer .dot-status {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #34d399;
    margin-right: 6px;
    box-shadow: 0 0 8px rgba(52, 211, 153, 0.6);
    vertical-align: middle;
  }

  /* ===== 移动端顶部栏 ===== */
  .mobile-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 64px;
    background: rgba(13, 30, 51, 0.96);
    backdrop-filter: blur(12px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    z-index: 50;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  }

  .mobile-menu-btn {
    width: 42px;
    height: 42px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.08);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: #fff;
    transition: all 0.2s;
  }

  .mobile-menu-btn:active {
    background: rgba(255, 255, 255, 0.15);
  }

  .mobile-menu-btn svg {
    width: 22px;
    height: 22px;
  }

  .mobile-nav {
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    background: rgba(13, 30, 51, 0.98);
    backdrop-filter: blur(12px);
    padding: 1rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.06);
    z-index: 49;
    display: none;
    box-shadow: 0 16px 32px rgba(0, 0, 0, 0.2);
  }

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

  .mobile-nav a {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    padding: 0.85rem 0.8rem;
    border-radius: 12px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all 0.2s;
  }

  .mobile-nav a:hover {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
  }

  .mobile-nav a.active {
    background: rgba(255, 255, 255, 0.12);
    color: #fff;
    box-shadow: inset 3px 0 0 var(--accent);
  }

  .mobile-nav a svg {
    width: 20px;
    height: 20px;
  }

  /* ===== 主内容区 ===== */
  .main-content {
    margin-left: var(--nav-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
  }

  /* ===== Hero ===== */
  .hero-section {
    position: relative;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    padding: 4.5rem 0 4rem;
  }

  .hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(13, 30, 51, 0.93) 0%, rgba(30, 58, 95, 0.82) 55%, rgba(13, 30, 51, 0.6) 100%);
    z-index: 0;
  }

  .hero-section .hero-inner {
    position: relative;
    z-index: 1;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 999px;
    background: rgba(255, 107, 53, 0.2);
    border: 1px solid rgba(255, 107, 53, 0.35);
    color: #ffd8c7;
    font-size: 0.82rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    margin-bottom: 1.2rem;
  }

  .hero-section h1 {
    font-size: clamp(2rem, 4vw, 3.2rem);
    font-weight: 800;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 1rem;
    letter-spacing: 0.01em;
  }

  .hero-section h1 .text-accent {
    color: var(--accent);
  }

  .hero-section p.hero-desc {
    font-size: 1.05rem;
    color: rgba(255, 255, 255, 0.85);
    max-width: 620px;
    line-height: 1.7;
    margin-bottom: 2rem;
  }

  .hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    max-width: 480px;
    margin-top: 2.5rem;
    padding-top: 1.8rem;
    border-top: 1px solid rgba(255, 255, 255, 0.14);
  }

  .hero-stats .stat-item {
    text-align: center;
  }

  .hero-stats .stat-value {
    font-size: 1.6rem;
    font-weight: 800;
    color: #fff;
    line-height: 1;
  }

  .hero-stats .stat-label {
    font-size: 0.78rem;
    color: rgba(255, 255, 255, 0.6);
    margin-top: 0.4rem;
  }

  /* ===== 按钮 ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.75rem;
    border-radius: 12px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all 0.25s ease;
    border: 2px solid transparent;
    line-height: 1.4;
  }

  .btn:focus-visible {
    outline: 3px solid rgba(255, 107, 53, 0.5);
    outline-offset: 2px;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--accent) 0%, var(--accent-dark) 100%);
    color: #fff;
    box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
  }

  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 107, 53, 0.45);
  }

  .btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 2px 8px rgba(255, 107, 53, 0.3);
  }

  .btn-ghost-light {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border-color: rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(6px);
  }

  .btn-ghost-light:hover {
    background: rgba(255, 255, 255, 0.15);
    border-color: rgba(255, 255, 255, 0.5);
    transform: translateY(-2px);
  }

  .btn-ghost-light:active {
    transform: translateY(0);
  }

  .btn-secondary {
    background: var(--brand);
    color: #fff;
    box-shadow: 0 4px 14px rgba(30, 58, 95, 0.3);
  }

  .btn-secondary:hover {
    background: var(--brand-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(30, 58, 95, 0.4);
  }

  .btn-secondary:active {
    transform: translateY(0);
  }

  /* ===== 面板/卡片 ===== */
  .section-title {
    font-size: clamp(1.6rem, 2.8vw, 2.2rem);
    font-weight: 800;
    color: var(--brand-dark);
    line-height: 1.25;
    letter-spacing: 0.01em;
  }

  .section-subtitle {
    color: var(--text-weak);
    font-size: 1rem;
    max-width: 640px;
    line-height: 1.7;
  }

  .section-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    padding: 0.3rem 0.9rem;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .card-rou {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
  }

  .card-rou:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
  }

  .channel-card {
    padding: 1.75rem 1.5rem;
    position: relative;
    overflow: hidden;
  }

  .channel-card::after {
    content: '';
    position: absolute;
    top: -40px;
    right: -40px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent), transparent);
    opacity: 0.06;
    transition: opacity 0.3s;
    pointer-events: none;
  }

  .channel-card:hover::after {
    opacity: 0.15;
  }

  .channel-icon {
    width: 52px;
    height: 52px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--brand-50, #eef5fb);
    color: var(--brand);
    margin-bottom: 1.1rem;
  }

  .channel-card:nth-child(2) .channel-icon {
    background: #fff3ec;
    color: var(--accent);
  }

  .channel-card:nth-child(3) .channel-icon {
    background: #e8f5ee;
    color: #2dd4a0;
  }

  .channel-card:nth-child(4) .channel-icon {
    background: #f3e8ff;
    color: #8b5cf6;
  }

  .channel-icon svg {
    width: 26px;
    height: 26px;
    stroke-width: 2;
  }

  .channel-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--brand-dark);
    margin-bottom: 0.5rem;
  }

  .channel-card p {
    font-size: 0.88rem;
    color: var(--text-weak);
    line-height: 1.65;
  }

  .channel-tag {
    display: inline-block;
    margin-top: 1rem;
    padding: 0.28rem 0.7rem;
    border-radius: 999px;
    background: var(--bg);
    border: 1px solid var(--border);
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--text-weak);
  }

  /* ===== 流程 ===== */
  .step-card {
    position: relative;
    padding: 1.6rem;
    background: #fff;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: all 0.3s;
  }

  .step-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
  }

  .step-number {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    margin: 0 auto 1rem;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand), var(--brand-light));
    color: #fff;
    font-weight: 800;
    font-size: 1.1rem;
    box-shadow: 0 6px 16px rgba(30, 58, 95, 0.3);
  }

  .step-card h3 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--brand-dark);
    margin-bottom: 0.4rem;
  }

  .step-card p {
    font-size: 0.82rem;
    color: var(--text-weak);
    line-height: 1.6;
  }

  .step-arrow {
    position: absolute;
    top: 50%;
    right: -20px;
    transform: translateY(-50%);
    color: #9aa8bb;
    z-index: 2;
    font-size: 1.4rem;
    display: flex;
  }

  /* ===== 功能亮点 ===== */
  .feature-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--border);
  }

  .feature-item:last-child {
    border-bottom: none;
  }

  .feature-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    margin-top: 0.6rem;
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.18);
    flex-shrink: 0;
  }

  .feature-item h4 {
    font-weight: 700;
    color: var(--brand-dark);
    font-size: 1rem;
    margin-bottom: 0.2rem;
  }

  .feature-item p {
    font-size: 0.85rem;
    color: var(--text-weak);
    line-height: 1.6;
  }

  /* ===== 安全提示 ===== */
  .safety-card {
    background: linear-gradient(135deg, #132a45 0%, #1e3a5f 100%);
    border-radius: 20px;
    padding: 2.2rem;
    color: #fff;
    position: relative;
    overflow: hidden;
  }

  .safety-card::before {
    content: '';
    position: absolute;
    bottom: -60px;
    right: -60px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(255, 107, 53, 0.15);
  }

  .safety-list {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.2rem 2rem;
  }

  .safety-item {
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
    font-size: 0.92rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.88);
  }

  .safety-item svg {
    width: 20px;
    height: 20px;
    color: var(--accent);
    flex-shrink: 0;
    margin-top: 0.15rem;
  }

  /* ===== FAQ ===== */
  .faq-item {
    border: 1px solid var(--border);
    border-radius: 14px;
    background: #fff;
    overflow: hidden;
    transition: border-color 0.3s, box-shadow 0.3s;
  }

  .faq-item:hover {
    border-color: #cbd5e1;
    box-shadow: var(--shadow-sm);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.2rem 1.4rem;
    cursor: pointer;
    font-weight: 600;
    color: var(--brand-dark);
    font-size: 0.98rem;
  }

  .faq-question .faq-toggle {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: all 0.3s;
    color: var(--text-weak);
  }

  .faq-item.open .faq-toggle {
    background: var(--accent);
    color: #fff;
    transform: rotate(45deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.3s;
    padding: 0 1.4rem;
    display: none;
  }

  .faq-item.open .faq-answer {
    display: block;
    max-height: 300px;
    padding: 0 1.4rem 1.3rem;
  }

  .faq-answer p {
    font-size: 0.88rem;
    color: var(--text-weak);
    line-height: 1.75;
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
  }

  /* ===== CTA ===== */
  .cta-section {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    padding: 3.5rem 3rem;
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    text-align: center;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(13, 30, 51, 0.92), rgba(30, 58, 95, 0.82));
    z-index: 0;
  }

  .cta-section > * {
    position: relative;
    z-index: 1;
  }

  /* ===== 页脚 ===== */
  .footer-rou {
    background: var(--brand-dark);
    color: rgba(255, 255, 255, 0.7);
  }

  .footer-rou .footer-title {
    font-size: 0.85rem;
    font-weight: 700;
    color: #fff;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    opacity: 0.9;
  }

  .footer-rou a {
    transition: opacity 0.2s, color 0.2s;
  }

  .footer-rou a:hover {
    color: var(--accent-light);
    opacity: 1;
  }

  /* ===== 响应式 ===== */
  @media (max-width: 1023px) {
    .sidebar {
      display: none;
    }

    .main-content {
      margin-left: 0;
      padding-top: 64px;
    }
  }

  @media (min-width: 1024px) {
    .mobile-header,
    .mobile-nav {
      display: none;
    }

    .main-content {
      margin-left: var(--nav-width);
    }
  }

  @media (max-width: 768px) {
    .section-title {
      font-size: 1.5rem;
    }

    .hero-section {
      padding: 3rem 0 3rem;
    }

    .hero-section h1 {
      font-size: 1.85rem;
    }

    .hero-section p.hero-desc {
      font-size: 0.95rem;
    }

    .hero-stats {
      grid-template-columns: repeat(3, 1fr);
      gap: 0.5rem;
      margin-top: 1.8rem;
      padding-top: 1.4rem;
    }

    .hero-stats .stat-value {
      font-size: 1.2rem;
    }

    .hero-stats .stat-label {
      font-size: 0.7rem;
    }

    .safety-list {
      grid-template-columns: 1fr;
    }

    .cta-section {
      padding: 2.5rem 1.5rem;
    }

    .step-arrow {
      display: none;
    }
  }

  @media (max-width: 520px) {
    .hero-stats {
      grid-template-columns: 1fr 1fr 1fr;
    }

    .hero-stats .stat-item:nth-child(3) {
      grid-column: span 1;
    }

    .section-title {
      font-size: 1.35rem;
    }

    .btn {
      padding: 0.7rem 1.25rem;
      font-size: 0.9rem;
    }
  }

/* roulang page: article */
:root {
    --brand-50: #eef7ff;
    --brand-100: #d9efff;
    --brand-500: #3395ff;
    --brand-600: #1a6fdb;
    --brand-800: #1a4f96;
    --brand-900: #0f2d55;
    --accent: #f59e0b;
    --bg: #f8fafc;
    --text: #1e293b;
    --text-soft: #64748b;
    --border: #e2e8f0;
    --radius: 16px;
    --radius-lg: 24px;
    --shadow-card: 0 4px 20px rgba(15,45,85,0.08);
    --shadow-hover: 0 14px 44px rgba(15,45,85,0.16);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; transition: all 0.25s ease; }
button { font-family: inherit; cursor: pointer; }

.container-roulang { max-width: 1280px; margin: 0 auto; padding: 0 24px; }

/* ===== 侧边导航 ===== */
.sidebar-rou {
    width: 264px;
    min-height: 100vh;
    background: linear-gradient(177deg, #0b2447 0%, #123a6e 55%, #1a6fdb 130%);
    position: fixed;
    left: 0;
    top: 0;
    z-index: 80;
    display: flex;
    flex-direction: column;
    padding: 30px 18px 24px;
    overflow-y: auto;
    transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}
.sidebar-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(15, 23, 42, 0.55);
    z-index: 70;
    backdrop-filter: blur(2px);
}
.brand-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 6px 10px 22px;
    border-bottom: 1px solid rgba(255,255,255,0.12);
    margin-bottom: 22px;
}
.brand-icon {
    width: 44px;
    height: 44px;
    border-radius: 14px;
    background: linear-gradient(135deg, rgba(255,255,255,0.22), rgba(255,255,255,0.08));
    border: 1px solid rgba(255,255,255,0.18);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.brand-text { font-size: 17px; font-weight: 800; color: #fff; line-height: 1.3; letter-spacing: 0.02em; }
.brand-sub { font-size: 11px; color: rgba(255,255,255,0.5); margin-top: 2px; }

.nav-section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    color: rgba(255,255,255,0.35);
    padding: 0 14px;
    margin-bottom: 10px;
    font-weight: 700;
}
.nav-link-item {
    display: flex;
    align-items: center;
    padding: 12px 14px;
    border-radius: 13px;
    color: rgba(255,255,255,0.72);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.25s ease;
    margin-bottom: 3px;
    gap: 12px;
}
.nav-link-item svg { width: 19px; height: 19px; flex-shrink: 0; }
.nav-link-item:hover {
    background: rgba(255,255,255,0.1);
    color: #fff;
    transform: translateX(3px);
}
.nav-link-item.active {
    background: rgba(255,255,255,0.16);
    color: #fff;
    box-shadow: inset 3px 0 0 rgba(255,255,255,0.85);
    font-weight: 600;
}
.sidebar-footer {
    margin-top: auto;
    padding: 18px 14px 4px;
    border-top: 1px solid rgba(255,255,255,0.1);
}
.sidebar-footer p {
    color: rgba(255,255,255,0.45);
    font-size: 12px;
    line-height: 1.7;
}

/* ===== 主内容区 ===== */
.main-wrapper { margin-left: 264px; min-height: 100vh; display: flex; flex-direction: column; }

/* 移动端顶栏 */
.mobile-topbar {
    display: none;
    position: sticky;
    top: 0;
    z-index: 60;
    background: rgba(11,36,71,0.95);
    backdrop-filter: blur(10px);
    color: #fff;
    padding: 12px 18px;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 4px 20px rgba(0,0,0,0.18);
}

/* ===== 面包屑 ===== */
.breadcrumb-rou {
    padding: 38px 24px 0;
    font-size: 13px;
    color: var(--text-soft);
}
.breadcrumb-rou a { color: var(--brand-600); font-weight: 500; }
.breadcrumb-rou a:hover { color: var(--brand-800); }
.breadcrumb-rou span { color: #94a3b8; }

/* ===== 文章 Hero ===== */
.article-hero {
    position: relative;
    border-radius: 24px;
    overflow: hidden;
    background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
    padding: 52px 48px;
    margin: 24px 32px 0;
    min-height: 300px;
    display: flex;
    align-items: flex-end;
    color: #fff;
}
.article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(11,36,71,0.92) 0%, rgba(11,36,71,0.72) 45%, rgba(26,111,219,0.35) 100%);
}
.article-hero > * { position: relative; z-index: 2; }

/* ===== 卡片 ===== */
.card-rou {
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.card-rou:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-3px);
}

/* ===== 标签 ===== */
.tag-rou {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 4px 12px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
    background: var(--brand-50);
    color: var(--brand-600);
    transition: background 0.2s ease, color 0.2s ease;
}
.tag-hot { background: #fef3c7; color: #d97706; }
.tag-green { background: #ecfdf5; color: #059669; }

/* ===== 文章正文排版 ===== */
.article-body {
    font-size: 16px;
    line-height: 1.95;
    color: #334155;
}
.article-body h2 {
    font-size: 23px;
    font-weight: 700;
    color: var(--brand-900);
    margin: 38px 0 18px;
    padding-left: 16px;
    border-left: 4px solid var(--brand-600);
    line-height: 1.4;
}
.article-body h3 {
    font-size: 18px;
    font-weight: 600;
    color: #1e293b;
    margin: 28px 0 12px;
}
.article-body p { margin-bottom: 18px; }
.article-body ul { margin-bottom: 20px; padding-left: 26px; list-style: none; }
.article-body ul li { position: relative; margin-bottom: 10px; padding-left: 18px; }
.article-body ul li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 11px;
    width: 7px;
    height: 7px;
    border-radius: 2px;
    background: var(--brand-500);
}
.article-body ol { margin-bottom: 20px; padding-left: 26px; list-style: decimal; }
.article-body ol li { margin-bottom: 10px; padding-left: 4px; }
.article-body blockquote {
    border-left: 3px solid var(--brand-500);
    background: var(--brand-50);
    padding: 16px 20px;
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
    color: var(--brand-800);
    font-weight: 500;
}
.article-body a { color: var(--brand-600); text-decoration: underline; }
.article-body a:hover { color: var(--brand-800); }
.article-body img { border-radius: 16px; margin: 24px 0; }

/* ===== FAQ ===== */
.faq-item {
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 22px 26px;
    background: #fff;
    transition: border-color 0.25s ease, box-shadow 0.25s ease;
}
.faq-item summary {
    cursor: pointer;
    font-weight: 700;
    font-size: 15px;
    color: var(--brand-900);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    user-select: none;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary .faq-icon {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--brand-50);
    color: var(--brand-600);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
    flex-shrink: 0;
    transition: transform 0.3s ease, background 0.3s ease;
}
.faq-item[open] {
    border-color: var(--brand-500);
    box-shadow: 0 0 0 4px rgba(26,111,219,0.08);
}
.faq-item[open] summary .faq-icon {
    transform: rotate(45deg);
    background: var(--brand-600);
    color: #fff;
}
.faq-item .faq-answer {
    margin-top: 14px;
    padding-top: 14px;
    border-top: 1px solid #f1f5f9;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-soft);
}

/* ===== 排行列表 ===== */
.rank-list-item {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 13px 16px;
    border-radius: 12px;
    transition: background 0.2s ease, transform 0.2s ease;
}
.rank-list-item:hover {
    background: var(--brand-50);
    transform: translateX(4px);
}
.rank-num {
    width: 30px;
    height: 30px;
    border-radius: 9px;
    background: #f1f5f9;
    color: var(--brand-800);
    font-size: 13px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}
.rank-list-item:nth-child(1) .rank-num { background: linear-gradient(135deg, #fbbf24, #f59e0b); color: #fff; }
.rank-list-item:nth-child(2) .rank-num { background: linear-gradient(135deg, #94a3b8, #64748b); color: #fff; }
.rank-list-item:nth-child(3) .rank-num { background: linear-gradient(135deg, #c08457, #92400e); color: #fff; }

/* ===== 按钮状态 ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    background: linear-gradient(135deg, #1a6fdb, #1a4f96);
    color: #fff;
    font-weight: 700;
    font-size: 15px;
    padding: 14px 32px;
    border-radius: 999px;
    border: none;
    box-shadow: 0 8px 24px rgba(26,111,219,0.3);
    transition: all 0.3s ease;
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 32px rgba(26,111,219,0.4);
    color: #fff;
}
.btn-primary:active { transform: translateY(0); box-shadow: 0 4px 12px rgba(26,111,219,0.25); }
.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: transparent;
    border: 2px solid rgba(255,255,255,0.6);
    color: #fff;
    font-weight: 600;
    font-size: 14px;
    padding: 10px 24px;
    border-radius: 999px;
    transition: all 0.3s ease;
}
.btn-outline:hover { background: rgba(255,255,255,0.15); border-color: #fff; }

/* ===== 页脚 ===== */
.footer-rou { background: #0b2447; color: #fff; }
.footer-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
}

/* ===== 焦点可访问性 ===== */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
    outline: 3px solid var(--brand-500);
    outline-offset: 2px;
    border-radius: 6px;
}

/* ===== 浮动操作条（移动端） ===== */
.mobile-action-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 55;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--border);
    padding: 12px 16px;
    box-shadow: 0 -6px 24px rgba(15,23,42,0.08);
}
.mobile-action-bar .btn-primary { width: 100%; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .sidebar-rou {
        transform: translateX(-100%);
        width: 280px;
        box-shadow: 8px 0 40px rgba(0,0,0,0.2);
    }
    .sidebar-rou.open { transform: translateX(0); }
    .sidebar-backdrop.open { display: block; }
    .main-wrapper { margin-left: 0; }
    .mobile-topbar { display: flex; }
    .mobile-action-bar { display: block; }
    .main-wrapper { padding-bottom: 70px; }
    .article-hero { margin: 18px 18px 0; padding: 40px 28px; }
    .breadcrumb-rou { padding: 24px 18px 0; }
}

@media (max-width: 768px) {
    .container-roulang { padding: 0 16px; }
    .article-hero { padding: 32px 22px; min-height: 240px; border-radius: 18px; }
    .article-hero h1 { font-size: 26px !important; }
    .breadcrumb-rou { font-size: 12px; }
}

@media (max-width: 540px) {
    .article-hero { margin: 14px 12px 0; padding: 26px 18px; min-height: 220px; }
    .breadcrumb-rou { padding: 18px 12px 0; }
    .card-rou { border-radius: 14px; }
    .article-body { font-size: 15px; }
    .article-body h2 { font-size: 20px; }
    .faq-item { padding: 18px 18px; }
}

/* roulang page: category3 */
:root {
            --color-primary: #1d4ed8;
            --color-primary-light: #3b82f6;
            --color-accent: #f97316;
            --color-accent-light: #fb923c;
            --color-bg: #f8fafc;
            --color-dark: #0f172a;
            --color-dark-soft: #1e293b;
            --color-text: #1e293b;
            --color-muted: #64748b;
            --color-border: #e2e8f0;
            --radius: 18px;
            --radius-sm: 12px;
            --shadow: 0 10px 30px rgba(15, 23, 42, .06);
            --shadow-lg: 0 20px 40px rgba(15, 23, 42, .1);
            --transition: all .25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--color-bg);
            color: var(--color-text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

        img {
            max-width: 100%;
            display: block;
        }

        button {
            cursor: pointer;
            border: none;
            background: none;
            font-family: inherit;
            transition: var(--transition);
        }

        .sidebar-roulang {
            background: linear-gradient(180deg, #1e293b 0%, var(--color-dark) 100%);
            color: #e2e8f0;
            display: flex;
            flex-direction: column;
            padding: 28px 24px;
            overflow-y: auto;
        }

        .sidebar-roulang::-webkit-scrollbar {
            width: 4px;
        }

        .sidebar-roulang::-webkit-scrollbar-thumb {
            background: rgba(255, 255, 255, .2);
            border-radius: 4px;
        }

        .brand-block {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 4px 24px;
            margin-bottom: 20px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .brand-icon {
            width: 44px;
            height: 44px;
            border-radius: 14px;
            background: linear-gradient(135deg, var(--color-primary-light), var(--color-accent));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-weight: 800;
            font-size: 18px;
            flex-shrink: 0;
            box-shadow: 0 8px 20px rgba(59, 130, 246, .35);
        }

        .brand-name {
            font-size: 17px;
            font-weight: 800;
            letter-spacing: .5px;
            color: #fff;
            line-height: 1.35;
        }

        .brand-sub {
            font-size: 11px;
            color: rgba(255, 255, 255, .5);
        }

        .nav-link-item {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 13px 16px;
            border-radius: 14px;
            color: rgba(255, 255, 255, .65);
            font-size: 15px;
            font-weight: 500;
            transition: var(--transition);
            margin-bottom: 4px;
            border: 1px solid transparent;
        }

        .nav-link-item:hover {
            background: rgba(255, 255, 255, .08);
            color: #fff;
            transform: translateX(3px);
        }

        .nav-link-item.active {
            background: linear-gradient(135deg, rgba(59, 130, 246, .25), rgba(249, 115, 22, .18));
            color: #fff;
            border-color: rgba(255, 255, 255, .08);
            box-shadow: 0 4px 16px rgba(0, 0, 0, .2);
        }

        .nav-link-item.active .nav-dot {
            background: var(--color-accent);
            box-shadow: 0 0 0 4px rgba(249, 115, 22, .2);
        }

        .nav-dot {
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: rgba(255, 255, 255, .3);
            transition: var(--transition);
        }

        .sidebar-card {
            margin-top: auto;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .08);
            border-radius: 16px;
            padding: 18px;
        }

        .sidebar-card p {
            font-size: 13px;
            color: rgba(255, 255, 255, .7);
            line-height: 1.6;
        }

        .mobile-header {
            background: rgba(15, 23, 42, .98);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .mobile-menu-panel {
            background: var(--color-dark);
            box-shadow: 0 20px 40px rgba(0, 0, 0, .3);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            max-height: 0;
            overflow: hidden;
            transition: max-height .4s ease;
        }

        .mobile-menu-panel.open {
            max-height: 480px;
        }

        .mobile-menu-panel .nav-link-item {
            border-radius: 0;
            padding: 14px 24px;
            border-bottom: 1px solid rgba(255, 255, 255, .04);
        }

        .container-roulang {
            max-width: 1240px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }

        .content-wrap {
            min-height: 100vh;
            background: var(--color-bg);
        }

        /* Hero */
        .hero-news {
            position: relative;
            padding: 80px 0 90px;
            overflow: hidden;
        }

        .hero-news-bg {
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(15, 23, 42, .92), rgba(29, 78, 216, .75)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            z-index: 0;
        }

        .hero-news-bg::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(249, 115, 22, .25), transparent 60%);
        }

        .hero-news .container-roulang {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .2);
            border-radius: 999px;
            padding: 6px 14px;
            font-size: 13px;
            color: #fff;
            font-weight: 500;
            backdrop-filter: blur(4px);
        }

        .hero-news h1 {
            font-size: clamp(32px, 5vw, 52px);
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            margin: 18px 0 14px;
            letter-spacing: -1px;
        }

        .hero-news .hero-desc {
            font-size: 17px;
            color: rgba(255, 255, 255, .8);
            max-width: 620px;
            line-height: 1.8;
        }

        .hero-stat-wrap {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 16px;
            margin-top: 40px;
            max-width: 680px;
        }

        .hero-stat-box {
            background: rgba(255, 255, 255, .1);
            border: 1px solid rgba(255, 255, 255, .14);
            border-radius: var(--radius-sm);
            padding: 16px 12px;
            text-align: center;
            backdrop-filter: blur(8px);
        }

        .hero-stat-box .num {
            font-size: 26px;
            font-weight: 800;
            color: #fff;
            line-height: 1.2;
        }

        .hero-stat-box .label {
            font-size: 12px;
            color: rgba(255, 255, 255, .6);
            margin-top: 4px;
        }

        /* Section */
        .section-roulang {
            padding: 72px 0;
        }

        .section-roulang-alt {
            background: #fff;
            border-top: 1px solid var(--color-border);
            border-bottom: 1px solid var(--color-border);
        }

        .section-head {
            display: flex;
            align-items: flex-end;
            justify-content: space-between;
            gap: 24px;
            margin-bottom: 36px;
            flex-wrap: wrap;
        }

        .section-head .eyebrow {
            font-size: 13px;
            font-weight: 700;
            color: var(--color-accent);
            text-transform: uppercase;
            letter-spacing: 1.5px;
            margin-bottom: 6px;
        }

        .section-head h2 {
            font-size: clamp(24px, 3vw, 34px);
            font-weight: 800;
            color: var(--color-text);
            line-height: 1.3;
            letter-spacing: -.5px;
        }

        .section-head p {
            color: var(--color-muted);
            font-size: 15px;
            max-width: 560px;
        }

        .see-all-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--color-primary);
            font-weight: 600;
            font-size: 14px;
            padding: 8px 18px;
            border-radius: 999px;
            background: rgba(29, 78, 216, .06);
            border: 1px solid rgba(29, 78, 216, .12);
            transition: var(--transition);
        }

        .see-all-link:hover {
            background: var(--color-primary);
            color: #fff;
            border-color: var(--color-primary);
        }

        /* Ranking */
        .rank-wrapper {
            background: #fff;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            border: 1px solid var(--color-border);
            overflow: hidden;
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 16px;
            padding: 16px 20px;
            border-bottom: 1px solid #f1f5f9;
            transition: var(--transition);
        }

        .rank-item:last-child {
            border-bottom: none;
        }

        .rank-item:hover {
            background: #f8fafc;
        }

        .rank-num {
            font-size: 20px;
            font-weight: 800;
            color: #cbd5e1;
            width: 36px;
            text-align: center;
            font-style: italic;
        }

        .rank-item:nth-child(1) .rank-num,
        .rank-item:nth-child(2) .rank-num,
        .rank-item:nth-child(3) .rank-num {
            color: var(--color-accent);
        }

        .rank-thumb {
            width: 88px;
            height: 58px;
            border-radius: 10px;
            object-fit: cover;
            flex-shrink: 0;
        }

        .rank-content {
            flex: 1;
            min-width: 0;
        }

        .rank-content h3 {
            font-size: 15px;
            font-weight: 700;
            color: var(--color-text);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
            transition: var(--transition);
        }

        .rank-content h3:hover {
            color: var(--color-primary);
        }

        .rank-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 12px;
            color: var(--color-muted);
            margin-top: 4px;
        }

        .hot-tag {
            background: linear-gradient(135deg, #f97316, #fb923c);
            color: #fff;
            font-size: 11px;
            font-weight: 700;
            padding: 2px 8px;
            border-radius: 999px;
            letter-spacing: .5px;
            flex-shrink: 0;
        }

        .tag-blue {
            background: rgba(29, 78, 216, .08);
            color: var(--color-primary);
        }

        .tag-green {
            background: rgba(16, 185, 129, .1);
            color: #059669;
        }

        .tag-purple {
            background: rgba(139, 92, 246, .1);
            color: #7c3aed;
        }

        /* Category Card */
        .cat-card {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            border: 1px solid var(--color-border);
            background: #fff;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .cat-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .cat-card-img {
            height: 160px;
            position: relative;
            overflow: hidden;
        }

        .cat-card-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .cat-card:hover .cat-card-img img {
            transform: scale(1.06);
        }

        .cat-card-img::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(15, 23, 42, .35));
        }

        .cat-card-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            z-index: 2;
        }

        .cat-card-body {
            padding: 22px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .cat-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-text);
            margin-bottom: 8px;
        }

        .cat-card-body p {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.7;
            flex: 1;
        }

        .cat-card-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 600;
            color: var(--color-primary);
            margin-top: 16px;
            transition: var(--transition);
        }

        .cat-card-link:hover {
            gap: 10px;
            color: var(--color-accent);
        }

        /* News Card */
        .news-card {
            background: #fff;
            border-radius: var(--radius);
            border: 1px solid var(--color-border);
            box-shadow: var(--shadow);
            overflow: hidden;
            transition: var(--transition);
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .news-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }

        .news-card-media {
            position: relative;
            aspect-ratio: 16/9;
            overflow: hidden;
        }

        .news-card-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .5s ease;
        }

        .news-card:hover .news-card-media img {
            transform: scale(1.05);
        }

        .news-card-media .post-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            z-index: 2;
        }

        .post-tag {
            display: inline-block;
            font-size: 11px;
            font-weight: 600;
            padding: 4px 10px;
            border-radius: 999px;
            background: rgba(15, 23, 42, .75);
            color: #fff;
            backdrop-filter: blur(4px);
        }

        .news-card-body {
            padding: 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }

        .news-card-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--color-text);
            line-height: 1.5;
            margin-bottom: 10px;
            transition: var(--transition);
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .news-card:hover .news-card-body h3 {
            color: var(--color-primary);
        }

        .news-card-body p {
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.7;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 14px;
        }

        .news-card-footer {
            margin-top: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            font-size: 12px;
            color: var(--color-muted);
            border-top: 1px solid #f1f5f9;
            padding-top: 12px;
        }

        /* Feature split */
        .feature-split {
            display: grid;
            grid-template-columns: 1.1fr .9fr;
            gap: 40px;
            align-items: center;
            background: var(--color-dark);
            border-radius: 24px;
            padding: 48px;
            position: relative;
            overflow: hidden;
        }

        .feature-split::before {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -80px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(249, 115, 22, .3), transparent 70%);
            border-radius: 50%;
        }

        .feature-split h2 {
            font-size: clamp(22px, 3vw, 32px);
            color: #fff;
            font-weight: 800;
            line-height: 1.35;
            margin-bottom: 14px;
        }

        .feature-split p {
            color: rgba(255, 255, 255, .72);
            font-size: 15px;
            line-height: 1.8;
        }

        .feature-split .feature-list {
            margin-top: 20px;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 12px;
        }

        .feature-list-item {
            display: flex;
            align-items: center;
            gap: 10px;
            color: rgba(255, 255, 255, .85);
            font-size: 14px;
        }

        .feature-list-item svg {
            color: var(--color-accent);
            flex-shrink: 0;
        }

        .feature-split-media {
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: 0 20px 60px rgba(0, 0, 0, .3);
        }

        .feature-split-media img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* FAQ */
        .faq-item {
            background: #fff;
            border: 1px solid var(--color-border);
            border-radius: var(--radius-sm);
            padding: 0;
            margin-bottom: 14px;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item:hover {
            border-color: rgba(29, 78, 216, .3);
        }

        .faq-question {
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 18px 22px;
            font-size: 15px;
            font-weight: 600;
            color: var(--color-text);
            text-align: left;
            background: none;
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(29, 78, 216, .08);
            color: var(--color-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 {
            transform: rotate(45deg);
            background: var(--color-primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-answer-inner {
            padding: 0 22px 20px;
            font-size: 14px;
            color: var(--color-muted);
            line-height: 1.8;
            border-top: 1px solid #f1f5f9;
            padding-top: 16px;
            margin-top: 0;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary), #1e40af);
            border-radius: 24px;
            padding: 56px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            top: -60px;
            left: -60px;
            width: 200px;
            height: 200px;
            background: radial-gradient(circle, rgba(255, 255, 255, .15), transparent 70%);
        }

        .cta-section::after {
            content: '';
            position: absolute;
            bottom: -80px;
            right: -40px;
            width: 260px;
            height: 260px;
            background: radial-gradient(circle, rgba(249, 115, 22, .4), transparent 70%);
        }

        .cta-section h2 {
            font-size: clamp(24px, 3vw, 34px);
            color: #fff;
            font-weight: 800;
            margin-bottom: 14px;
            position: relative;
            z-index: 2;
        }

        .cta-section p {
            color: rgba(255, 255, 255, .85);
            font-size: 15px;
            max-width: 520px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 2;
        }

        .cta-buttons {
            display: flex;
            gap: 14px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .btn-roulang-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--color-primary);
            font-weight: 700;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: 999px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, .15);
            transition: var(--transition);
        }

        .btn-roulang-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, .2);
        }

        .btn-roulang-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            color: #fff;
            font-weight: 600;
            font-size: 15px;
            padding: 14px 28px;
            border-radius: 999px;
            border: 1px solid rgba(255, 255, 255, .25);
            backdrop-filter: blur(4px);
            transition: var(--transition);
        }

        .btn-roulang-ghost:hover {
            background: rgba(255, 255, 255, .2);
        }

        /* Footer */
        .footer-rou {
            background: var(--color-dark);
            color: rgba(255, 255, 255, .8);
            border-top: 1px solid rgba(255, 255, 255, .06);
        }

        .footer-title {
            font-size: 14px;
            font-weight: 700;
            color: #fff;
            letter-spacing: .5px;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .hero-stat-wrap {
                grid-template-columns: repeat(2, 1fr);
                max-width: none;
            }

            .feature-split {
                grid-template-columns: 1fr;
                padding: 36px 28px;
            }

            .feature-split-media {
                order: -1;
            }

            .cta-section {
                padding: 40px 28px;
            }
        }

        @media (max-width: 768px) {
            .section-roulang {
                padding: 52px 0;
            }

            .rank-item {
                flex-wrap: wrap;
                padding: 14px;
            }

            .rank-thumb {
                width: 70px;
                height: 50px;
            }

            .hero-news {
                padding: 56px 0 68px;
            }

            .feature-list {
                grid-template-columns: 1fr;
            }
        }

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

            .hero-stat-wrap {
                grid-template-columns: repeat(2, 1fr);
                gap: 10px;
            }

            .rank-content h3 {
                white-space: normal;
                display: -webkit-box;
                -webkit-line-clamp: 2;
                -webkit-box-orient: vertical;
            }

            .rank-num {
                width: 24px;
                font-size: 16px;
            }

            .section-head {
                flex-direction: column;
                align-items: flex-start;
                gap: 12px;
            }

            .cta-buttons .btn-roulang-primary,
            .cta-buttons .btn-roulang-ghost {
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --accent: #f59e0b;
            --bg: #f8fafc;
            --surface: #ffffff;
            --text: #0f172a;
            --text-muted: #64748b;
            --border: #e2e8f0;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.04);
            --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.07);
            --shadow-lg: 0 24px 48px rgba(15, 23, 42, 0.10);
            --sidebar-bg: #0f172a;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            line-height: 1.6;
            background: var(--bg);
            color: var(--text);
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
        }

        img {
            display: block;
            max-width: 100%;
        }

        button {
            font-family: inherit;
            cursor: pointer;
        }

        a:focus-visible,
        button:focus-visible,
        summary:focus-visible {
            outline: 3px solid rgba(37, 99, 235, 0.5);
            outline-offset: 2px;
            border-radius: 8px;
        }

        .container-roulang {
            width: 100%;
            max-width: 1240px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        .section-rou {
            padding: 5rem 0;
        }

        .section-head {
            max-width: 680px;
            margin-bottom: 3rem;
        }

        .section-head h2 {
            font-size: 2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-top: 0.75rem;
        }

        .section-head p {
            color: var(--text-muted);
            line-height: 1.75;
            margin-top: 0.75rem;
        }

        .section-head.dark h2 {
            color: #fff;
        }

        .section-head.dark p {
            color: rgba(255, 255, 255, 0.6);
        }

        .eyebrow-rou {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.8rem;
            font-weight: 700;
            letter-spacing: 0.06em;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.08);
            padding: 0.4rem 1rem;
            border-radius: 999px;
            text-transform: uppercase;
        }

        .eyebrow-rou.dark {
            color: #93c5fd;
            background: rgba(255, 255, 255, 0.08);
        }

        .badge-rou {
            display: inline-flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.8rem;
            font-weight: 700;
            padding: 0.4rem 1rem;
            border-radius: 999px;
            background: rgba(37, 99, 235, 0.12);
            color: var(--primary);
        }

        .badge-rou.light {
            background: rgba(255, 255, 255, 0.16);
            color: #fff;
            backdrop-filter: blur(6px);
            border: 1px solid rgba(255, 255, 255, 0.25);
        }

        .breadcrumb-rou a {
            transition: color 0.2s ease;
        }

        .sidebar-rou {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: var(--sidebar-bg);
            color: #fff;
            z-index: 50;
            display: flex;
            flex-direction: column;
            padding: 0 1.5rem;
        }

        .sidebar-brand {
            padding: 1.75rem 0 1.25rem;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .sidebar-foot {
            margin-top: auto;
            padding: 1.25rem 0;
            border-top: 1px solid rgba(255, 255, 255, 0.08);
        }

        .nav-link-item {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            padding: 0.75rem 1rem;
            border-radius: 12px;
            color: rgba(255, 255, 255, 0.68);
            font-size: 0.925rem;
            font-weight: 500;
            transition: all 0.2s ease;
        }

        .nav-link-item:hover {
            background: rgba(255, 255, 255, 0.08);
            color: #fff;
        }

        .nav-link-item.active {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.35);
        }

        .site-main {
            margin-left: 280px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .site-main main {
            flex: 1;
        }

        .btn-rou {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 0.5rem;
            font-weight: 700;
            font-size: 0.95rem;
            padding: 0.8rem 1.8rem;
            border-radius: 999px;
            transition: all 0.25s ease;
            border: 2px solid transparent;
            cursor: pointer;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.25);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            box-shadow: 0 12px 28px rgba(37, 99, 235, 0.3);
            transform: translateY(-2px);
        }

        .btn-primary:active {
            transform: translateY(0);
        }

        .btn-outline {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.35);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: rgba(255, 255, 255, 0.6);
            transform: translateY(-2px);
        }

        .btn-glass {
            background: rgba(255, 255, 255, 0.12);
            color: #fff;
            border-color: rgba(255, 255, 255, 0.3);
            backdrop-filter: blur(8px);
        }

        .btn-glass:hover {
            background: rgba(255, 255, 255, 0.22);
            border-color: rgba(255, 255, 255, 0.5);
            transform: translateY(-2px);
        }

        .card-rou {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 1.75rem;
            box-shadow: var(--shadow-sm);
            transition: all 0.3s ease;
        }

        .card-rou:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.28);
        }

        .card-icon {
            width: 52px;
            height: 52px;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.4rem;
            color: #fff;
            background: linear-gradient(135deg, #60a5fa, var(--primary));
            box-shadow: 0 8px 18px rgba(37, 99, 235, 0.25);
        }

        .badge-rou-sm {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 700;
            padding: 0.25rem 0.65rem;
            border-radius: 999px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
        }

        .card-link {
            display: inline-flex;
            align-items: center;
            gap: 0.4rem;
            font-size: 0.85rem;
            font-weight: 600;
            color: var(--primary);
            margin-top: 1rem;
            transition: gap 0.2s ease;
        }

        .card-link:hover {
            gap: 0.7rem;
        }

        .guide-step {
            display: flex;
            gap: 1.25rem;
            padding: 1.25rem 1.5rem;
            background: #f8fafc;
            border: 1px solid var(--border);
            border-radius: 18px;
            transition: all 0.3s ease;
        }

        .guide-step:hover {
            background: #fff;
            border-color: rgba(37, 99, 235, 0.25);
            box-shadow: var(--shadow-md);
            transform: translateY(-3px);
        }

        .step-num {
            width: 46px;
            height: 46px;
            flex-shrink: 0;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1rem;
            color: var(--primary);
            background: rgba(37, 99, 235, 0.1);
            border: 1px solid rgba(37, 99, 235, 0.18);
        }

        .rank-item {
            display: flex;
            align-items: center;
            gap: 1.5rem;
            padding: 1.25rem 1.5rem;
            background: rgba(255, 255, 255, 0.05);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: 18px;
            transition: all 0.3s ease;
        }

        .rank-item:hover {
            background: rgba(255, 255, 255, 0.09);
            transform: translateX(8px);
            border-color: rgba(255, 255, 255, 0.16);
        }

        .rank-num {
            font-size: 1.75rem;
            font-weight: 800;
            color: rgba(255, 255, 255, 0.28);
            min-width: 3.5rem;
        }

        .rank-heat {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            min-width: 180px;
        }

        .heat-bar {
            flex: 1;
            height: 8px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 999px;
            overflow: hidden;
        }

        .heat-bar span {
            display: block;
            height: 100%;
            border-radius: 999px;
            background: linear-gradient(90deg, #3b82f6, #f59e0b);
        }

        .faq-grid {
            max-width: 860px;
            margin: 0 auto;
            display: grid;
            gap: 1rem;
        }

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: 18px;
            padding: 1.25rem 1.5rem;
            transition: box-shadow 0.3s ease;
        }

        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }

        .faq-item summary {
            display: flex;
            align-items: center;
            justify-content: space-between;
            list-style: none;
            cursor: pointer;
            font-weight: 700;
            font-size: 1rem;
            color: var(--text);
            gap: 1rem;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

        .faq-item summary i {
            transition: transform 0.3s ease;
            color: var(--text-muted);
            flex-shrink: 0;
        }

        .faq-item[open] summary i {
            transform: rotate(180deg);
        }

        .faq-item p {
            margin-top: 0.75rem;
            color: var(--text-muted);
            line-height: 1.75;
            font-size: 0.925rem;
            border-top: 1px solid var(--border);
            padding-top: 0.75rem;
        }

        .cta-rou {
            background: linear-gradient(135deg, #1e293b 0%, #0f172a 100%);
            padding: 5rem 0;
        }

        .cta-inner {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 2rem;
            background: rgba(255, 255, 255, 0.06);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 32px;
            padding: 3rem;
        }

        .cta-inner h2 {
            color: #fff;
            font-size: 1.75rem;
            font-weight: 800;
            line-height: 1.3;
            margin-top: 0.4rem;
        }

        .cta-inner p {
            color: rgba(255, 255, 255, 0.7);
            margin-top: 0.5rem;
            line-height: 1.7;
        }

        .footer-rou {
            background: #0f172a;
            color: #fff;
        }

        .footer-title {
            color: rgba(255, 255, 255, 0.95);
            font-weight: 700;
            font-size: 1rem;
        }

        .mobile-topbar {
            display: none;
            position: sticky;
            top: 0;
            z-index: 60;
            align-items: center;
            justify-content: space-between;
            background: #0f172a;
            color: #fff;
            padding: 0.9rem 1.5rem;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.18);
        }

        .mobile-menu-btn {
            width: 44px;
            height: 44px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.1);
            border: 1px solid rgba(255, 255, 255, 0.15);
            display: inline-flex;
            align-items: center;
            justify-content: center;
            transition: background 0.2s ease;
        }

        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.18);
        }

        .mobile-nav-panel {
            display: none;
            background: #0f172a;
            padding: 0.75rem 1.5rem 1.5rem;
        }

        .mobile-nav-panel.open {
            display: block;
        }

        @media (max-width: 1024px) {
            .sidebar-rou {
                display: none;
            }

            .site-main {
                margin-left: 0;
            }

            .mobile-topbar {
                display: flex;
            }
        }

        @media (max-width: 768px) {
            .section-rou {
                padding: 3.5rem 0;
            }

            .section-head h2 {
                font-size: 1.6rem;
            }

            .cta-rou {
                padding: 3.5rem 0;
            }

            .cta-inner {
                padding: 2rem 1.5rem;
            }

            .rank-item {
                flex-wrap: wrap;
                gap: 0.75rem 1rem;
            }

            .rank-heat {
                min-width: calc(100% - 5rem);
            }

            .container-roulang {
                padding-left: 1.25rem;
                padding-right: 1.25rem;
            }
        }

        @media (max-width: 520px) {
            .btn-rou {
                padding: 0.75rem 1.4rem;
                font-size: 0.9rem;
            }

            .rank-num {
                min-width: 2.5rem;
                font-size: 1.5rem;
            }

            .rank-heat {
                min-width: 100%;
            }
        }