/* roulang page: index */
:root {
    --brand: #4f46e5;
    --brand-light: #6366f1;
    --brand-dark: #3730a3;
    --cyan: #06b6d4;
    --gold: #f59e0b;
    --bg-light: #f8fafc;
    --bg-white: #ffffff;
    --text-main: #1e1b4b;
    --text-body: #475569;
    --text-muted: #94a3b8;
    --border: #e2e8f0;
    --radius: 1rem;
    --radius-lg: 1.5rem;
    --space-section: 5rem;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    color: var(--text-body);
    background: var(--bg-light);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }
  *,
  *::before,
  *::after {
    box-sizing: border-box;
  }
  a {
    text-decoration: none;
    color: inherit;
  }
  img {
    max-width: 100%;
    display: block;
  }
  .container-custom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1.25rem;
  }
  .section-pad {
    padding: var(--space-section) 0;
  }
  .section-title {
    font-size: 2.25rem;
    font-weight: 800;
    color: var(--text-main);
    letter-spacing: -0.02em;
    line-height: 1.2;
  }
  .section-subtitle {
    font-size: 1.125rem;
    color: var(--text-body);
    margin-top: 0.75rem;
  }
  .text-gradient {
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    color: #fff;
    font-weight: 600;
    padding: .875rem 1.75rem;
    border-radius: 999px;
    transition: all .3s ease;
    box-shadow: 0 4px 20px rgba(79, 70, 229, .35);
    border: none;
    cursor: pointer;
  }
  .btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(79, 70, 229, .45);
  }
  .btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .5rem;
    background: transparent;
    color: var(--text-main);
    font-weight: 600;
    padding: .875rem 1.75rem;
    border-radius: 999px;
    border: 2px solid var(--border);
    transition: all .3s ease;
    cursor: pointer;
  }
  .btn-outline:hover {
    border-color: var(--brand);
    color: var(--brand);
    background: rgba(79, 70, 229, .04);
  }
  /* Dock Nav */
  .dock-nav {
    position: fixed;
    top: 1rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 50;
    width: 95%;
    max-width: 1100px;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 999px;
    box-shadow: 0 8px 32px rgba(30, 27, 75, .1);
    border: 1px solid rgba(255, 255, 255, .7);
    padding: .625rem 1.25rem;
    transition: box-shadow .3s ease;
  }
  .dock-nav.scrolled {
    box-shadow: 0 12px 40px rgba(30, 27, 75, .16);
  }
  .dock-nav .nav-link {
    padding: .5rem 1.1rem;
    border-radius: 999px;
    font-weight: 500;
    color: #475569;
    transition: all .25s ease;
    font-size: .925rem;
  }
  .dock-nav .nav-link:hover {
    background: rgba(79, 70, 229, .08);
    color: #4f46e5;
  }
  .dock-nav .nav-link.active {
    background: #4f46e5;
    color: #fff;
    box-shadow: 0 4px 16px rgba(79, 70, 229, .3);
  }
  /* Hero */
  .hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 45%, #312e81 100%);
    overflow: hidden;
    padding: 7rem 0 4rem;
  }
  .hero-bg {
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: .25;
    z-index: 0;
  }
  .hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(transparent, #f8fafc);
    z-index: 1;
  }
  .hero-content {
    position: relative;
    z-index: 2;
  }
  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    background: rgba(255, 255, 255, .12);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, .2);
    border-radius: 999px;
    padding: .375rem 1rem;
    color: #e0e7ff;
    font-size: .875rem;
    font-weight: 500;
  }
  .hero h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.1;
    letter-spacing: -0.03em;
  }
  .hero h1 .highlight {
    background: linear-gradient(135deg, #a5b4fc, #22d3ee);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
  }
  .hero-desc {
    font-size: 1.125rem;
    color: #c7d2fe;
    max-width: 580px;
    line-height: 1.8;
  }
  /* Cards */
  .card-base {
    background: var(--bg-white);
    border-radius: var(--radius);
    box-shadow: var(--shadow-soft, 0 4px 24px rgba(30, 27, 75, .06));
    transition: all .3s ease;
    border: 1px solid var(--border);
    overflow: hidden;
  }
  .card-base:hover {
    box-shadow: var(--shadow-hover, 0 16px 40px rgba(30, 27, 75, .14));
    transform: translateY(-4px);
  }
  /* Category card */
  .category-card {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: #fff;
    box-shadow: 0 4px 24px rgba(30, 27, 75, .06);
    transition: all .35s ease;
    border: 1px solid var(--border);
  }
  .category-card:hover {
    box-shadow: 0 20px 48px rgba(30, 27, 75, .14);
    transform: translateY(-6px);
  }
  .category-card img {
    height: 220px;
    width: 100%;
    object-fit: cover;
    transition: transform .5s ease;
  }
  .category-card:hover img {
    transform: scale(1.04);
  }
  .category-card .overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(30, 27, 75, .7));
    z-index: 1;
  }
  .category-card .card-body {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 1.5rem;
    z-index: 2;
    color: #fff;
  }
  /* Feature list */
  .feature-item {
    display: flex;
    align-items: flex-start;
    gap: .875rem;
    padding: .75rem 0;
  }
  .feature-item .icon {
    flex-shrink: 0;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(79, 70, 229, .08);
    color: var(--brand);
  }
  /* Steps */
  .step-card {
    position: relative;
    background: #fff;
    border-radius: var(--radius);
    padding: 2rem 1.5rem;
    text-align: center;
    box-shadow: 0 4px 24px rgba(30, 27, 75, .05);
    border: 1px solid var(--border);
    transition: all .3s ease;
  }
  .step-card:hover {
    box-shadow: 0 12px 32px rgba(30, 27, 75, .1);
    transform: translateY(-3px);
  }
  .step-num {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1.125rem;
    margin: 0 auto 1rem;
  }
  /* FAQ */
  .faq-item {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: .875rem;
    overflow: hidden;
    transition: border-color .3s ease;
  }
  .faq-item:hover {
    border-color: rgba(79, 70, 229, .3);
  }
  .faq-item summary {
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background .3s ease;
  }
  .faq-item summary::-webkit-details-marker {
    display: none;
  }
  .faq-item summary::after {
    content: '＋';
    color: var(--brand);
    font-size: 1.25rem;
    transition: transform .3s ease;
  }
  .faq-item[open] summary::after {
    content: '－';
    transform: rotate(180deg);
  }
  .faq-item .faq-body {
    padding: 0 1.5rem 1.25rem;
    color: var(--text-body);
    font-size: .95rem;
    line-height: 1.7;
  }
  /* Footer */
  .site-footer {
    background: #0f172a;
    color: #94a3b8;
    padding: 3rem 0 2rem;
  }
  .site-footer .copyright {
    border-top: 1px solid rgba(148, 163, 184, .15);
    padding-top: 1.5rem;
    margin-top: 2rem;
    font-size: .875rem;
    text-align: center;
    color: #64748b;
  }
  /* Mobile menu */
  .mobile-menu {
    display: none;
    position: fixed;
    top: 76px;
    left: 1rem;
    right: 1rem;
    background: #fff;
    border-radius: 1rem;
    box-shadow: 0 20px 50px rgba(15, 23, 42, .2);
    padding: 1rem;
    z-index: 49;
    border: 1px solid var(--border);
  }
  .mobile-menu.open {
    display: block;
  }
  .mobile-menu a {
    display: block;
    padding: .75rem 1rem;
    border-radius: .75rem;
    font-weight: 500;
    color: var(--text-main);
    transition: background .2s ease;
  }
  .mobile-menu a:hover {
    background: rgba(79, 70, 229, .06);
  }
  @media (max-width: 768px) {
    .section-title {
      font-size: 1.75rem;
    }
    .hero {
      min-height: auto;
      padding: 7rem 0 5rem;
    }
    .desktop-only {
      display: none !important;
    }
    .dock-nav .nav-links {
      display: none;
    }
    .dock-nav .cta-desktop {
      display: none;
    }
  }
  @media (min-width: 769px) {
    .mobile-btn {
      display: none;
    }
  }
  /* Utility */
  .line-clamp-1 {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .line-clamp-2 {
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
  }
  .badge {
    display: inline-flex;
    align-items: center;
    gap: .25rem;
    padding: .25rem .75rem;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 600;
    background: rgba(79, 70, 229, .08);
    color: var(--brand);
  }
  .badge-green {
    background: rgba(16, 185, 129, .1);
    color: #059669;
  }
  .badge-amber {
    background: rgba(245, 158, 11, .12);
    color: #b45309;
  }
  .stat-num {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1;
  }
  .stat-label {
    font-size: .875rem;
    color: var(--text-muted);
    margin-top: .375rem;
  }
  .cta-section {
    background: linear-gradient(135deg, #1e1b4b, #312e81, #0e7490);
    border-radius: 2rem;
    padding: 4rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
  }
  .cta-section::before {
    content: '';
    position: absolute;
    top: -60%;
    left: -30%;
    width: 80%;
    height: 200%;
    background: radial-gradient(circle, rgba(34, 211, 238, .2), transparent 60%);
    pointer-events: none;
  }

/* roulang page: category1 */
:root {
    --primary: #4f46e5;
    --primary-light: #eef2ff;
    --accent: #06b6d4;
    --bg-body: #f8fafc;
    --bg-white: #ffffff;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --shadow-card: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-hover: 0 12px 32px rgba(15, 23, 42, 0.12);
    --space-section: 88px;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
  }

  .container-custom {
    width: 100%;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 20px;
    padding-right: 20px;
  }

  /* ---- 导航 Dock ---- */
  .dock-nav {
    position: sticky;
    top: 16px;
    z-index: 50;
    margin: 16px auto 0;
    max-width: 1060px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    box-shadow: 0 8px 32px rgba(15, 23, 42, 0.10);
    padding: 12px 24px;
    transition: box-shadow 0.3s ease;
  }

  .dock-nav:hover {
    box-shadow: 0 12px 40px rgba(15, 23, 42, 0.14);
  }

  .nav-link {
    position: relative;
    display: inline-flex;
    align-items: center;
    padding: 8px 16px;
    border-radius: 12px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.25s ease;
  }

  .nav-link:hover {
    color: var(--primary);
    background: var(--primary-light);
  }

  .nav-link.active {
    color: var(--primary);
    background: var(--primary-light);
    font-weight: 600;
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 3px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
  }

  .cta-desktop {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: white;
    padding: 10px 24px;
    border-radius: 999px;
    font-size: 14px;
    font-weight: 600;
    box-shadow: 0 4px 16px rgba(79, 70, 229, 0.28);
    transition: all 0.3s ease;
    text-decoration: none;
  }

  .cta-desktop:hover {
    box-shadow: 0 8px 24px rgba(79, 70, 229, 0.40);
    transform: translateY(-2px);
    color: white;
    text-decoration: none;
  }

  .mobile-btn {
    transition: all 0.2s ease;
  }

  .mobile-btn:active {
    transform: scale(0.95);
    background: var(--primary-light);
  }

  .mobile-menu {
    display: none;
    padding: 12px 4px 8px;
    border-top: 1px solid var(--border);
    margin-top: 10px;
  }

  .mobile-menu.open {
    display: block;
    animation: fadeIn 0.25s ease;
  }

  .mobile-menu a {
    display: block;
    padding: 12px 16px;
    border-radius: 12px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.2s ease;
  }

  .mobile-menu a:hover {
    background: var(--primary-light);
    color: var(--primary);
  }

  .mobile-menu a.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
  }

  @keyframes fadeIn {
    from { opacity: 0; transform: translateY(-8px); }
    to { opacity: 1; transform: translateY(0); }
  }

  /* ---- 板块 ---- */
  .section {
    padding: 88px 0;
  }

  .section-sm {
    padding: 56px 0;
  }

  .section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
  }

  .section-eyebrow {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    letter-spacing: 0.02em;
    margin-bottom: 14px;
  }

  .section-title {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1.3;
    letter-spacing: -0.02em;
    color: var(--text-main);
    margin-bottom: 14px;
  }

  .section-subtitle {
    color: var(--text-muted);
    font-size: 16px;
    line-height: 1.7;
  }

  /* ---- Hero ---- */
  .hero-section {
    position: relative;
    min-height: 620px;
    display: flex;
    align-items: center;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    isolation: isolate;
    margin-top: -88px;
    padding-top: 160px;
  }

  .hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(90deg, rgba(15, 23, 42, 0.88) 0%, rgba(15, 23, 42, 0.72) 50%, rgba(15, 23, 42, 0.55) 100%);
    z-index: -1;
  }

  .hero-content {
    max-width: 720px;
    padding: 80px 0;
  }

  .hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.24);
    backdrop-filter: blur(8px);
    border-radius: 999px;
    padding: 8px 20px;
    color: #f1f5f9;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 24px;
  }

  .hero-title {
    font-size: 3.4rem;
    font-weight: 800;
    line-height: 1.2;
    color: #ffffff;
    letter-spacing: -0.03em;
    margin-bottom: 20px;
  }

  .hero-title-gradient {
    background: linear-gradient(100deg, #a5b4fc, #67e8f9);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
  }

  .hero-desc {
    font-size: 17px;
    line-height: 1.8;
    color: rgba(241, 245, 249, 0.82);
    margin-bottom: 36px;
    max-width: 600px;
  }

  .hero-badge-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 32px;
  }

  .hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.18);
    border-radius: 12px;
    padding: 8px 16px;
    color: #e2e8f0;
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(6px);
  }

  .hero-badge i {
    color: #67e8f9;
  }

  /* ---- 按钮 ---- */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 999px;
    font-weight: 600;
    font-size: 15px;
    padding: 14px 32px;
    transition: all 0.3s ease;
    text-decoration: none;
    border: none;
    cursor: pointer;
    line-height: 1.4;
  }

  .btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    color: #fff;
    box-shadow: 0 6px 20px rgba(79, 70, 229, 0.30);
  }

  .btn-primary:hover {
    box-shadow: 0 10px 32px rgba(79, 70, 229, 0.42);
    transform: translateY(-3px);
    color: #fff;
    text-decoration: none;
  }

  .btn-outline {
    background: transparent;
    border: 2px solid #e2e8f0;
    color: var(--text-main);
  }

  .btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-3px);
    text-decoration: none;
  }

  .btn-white {
    background: #fff;
    color: var(--primary);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
  }

  .btn-white:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.20);
    color: var(--primary);
    text-decoration: none;
  }

  .btn:focus-visible {
    outline: 3px solid rgba(99, 102, 241, 0.5);
    outline-offset: 2px;
  }

  /* ---- 卡片 ---- */
  .feature-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    transition: all 0.35s ease;
    height: 100%;
  }

  .feature-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-6px);
    border-color: rgba(99, 102, 241, 0.25);
  }

  .feature-icon {
    width: 56px;
    height: 56px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 20px;
    background: linear-gradient(135deg, #eef2ff, #ecfeff);
    color: var(--primary);
    transition: all 0.3s ease;
  }

  .feature-card:hover .feature-icon {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    transform: scale(1.05);
  }

  .feature-title {
    font-size: 17px;
    font-weight: 700;
    margin-bottom: 10px;
    color: var(--text-main);
  }

  .feature-desc {
    font-size: 14.5px;
    color: var(--text-muted);
    line-height: 1.7;
  }

  /* ---- 步骤 ---- */
  .step-item {
    position: relative;
    padding: 28px 24px;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
    height: 100%;
    transition: all 0.3s ease;
  }

  .step-item:hover {
    box-shadow: var(--shadow-card);
    border-color: rgba(99, 102, 241, 0.25);
  }

  .step-num {
    width: 42px;
    height: 42px;
    border-radius: 14px;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-weight: 700;
    font-size: 17px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
    font-style: normal;
  }

  .step-item h3 {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
  }

  .step-item p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.65;
  }

  /* ---- 数据统计 ---- */
  .stats-section {
    background-image: url('/assets/images/backpic/back-2.png');
    background-size: cover;
    background-position: center;
    position: relative;
    isolation: isolate;
  }

  .stats-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.94), rgba(30, 27, 75, 0.88));
    z-index: -1;
  }

  .stat-card {
    text-align: center;
    padding: 36px 20px;
    border-radius: var(--radius-md);
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.10);
    backdrop-filter: blur(8px);
    transition: all 0.3s ease;
  }

  .stat-card:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-4px);
  }

  .stat-num {
    font-size: 2.6rem;
    font-weight: 800;
    color: #fff;
    line-height: 1.2;
    letter-spacing: -0.02em;
  }

  .stat-label {
    font-size: 14px;
    color: rgba(226, 232, 240, 0.75);
    margin-top: 8px;
  }

  /* ---- FAQ ---- */
  .faq-item {
    background: var(--bg-white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-bottom: 14px;
    overflow: hidden;
    transition: all 0.3s ease;
  }

  .faq-item:hover {
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: var(--shadow-card);
  }

  .faq-question {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    cursor: pointer;
    font-size: 15.5px;
    font-weight: 600;
    color: var(--text-main);
    transition: background 0.2s ease;
  }

  .faq-question:hover {
    background: #fafbff;
  }

  .faq-question i {
    color: var(--primary);
    font-size: 14px;
    transition: transform 0.3s ease;
    flex-shrink: 0;
  }

  .faq-item.active .faq-question i {
    transform: rotate(180deg);
  }

  .faq-answer {
    display: none;
    padding: 0 24px 20px;
    color: var(--text-muted);
    font-size: 14.5px;
    line-height: 1.75;
  }

  .faq-item.active .faq-answer {
    display: block;
    animation: fadeIn 0.3s ease;
  }

  /* ---- 图文内容 card ---- */
  .content-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    overflow: hidden;
    transition: all 0.35s ease;
    box-shadow: var(--shadow-card);
    height: 100%;
    display: flex;
    flex-direction: column;
  }

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

  .content-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16 / 10;
  }

  .content-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .content-card:hover .content-thumb img {
    transform: scale(1.05);
  }

  .content-body {
    padding: 24px;
    display: flex;
    flex-direction: column;
    flex: 1;
  }

  .content-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
  }

  .content-tag {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 999px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 12px;
    font-weight: 600;
  }

  .content-time {
    font-size: 12.5px;
    color: var(--text-muted);
  }

  .content-title {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 8px;
    line-height: 1.5;
  }

  .content-desc {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.65;
    flex: 1;
    margin-bottom: 16px;
  }

  .content-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    transition: gap 0.25s ease;
    text-decoration: none;
  }

  .content-link:hover {
    gap: 12px;
    text-decoration: none;
    color: var(--primary);
  }

  /* ---- CTA ---- */
  .cta-section {
    background-image: url('/assets/images/backpic/back-3.png');
    background-size: cover;
    background-position: center;
    position: relative;
    isolation: isolate;
    border-radius: var(--radius-lg);
    padding: 64px 48px;
    text-align: center;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, rgba(79, 70, 229, 0.92), rgba(6, 182, 212, 0.88));
    border-radius: inherit;
    z-index: -1;
  }

  .cta-title {
    font-size: 2.2rem;
    font-weight: 800;
    color: #fff;
    margin-bottom: 16px;
  }

  .cta-desc {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.84);
    max-width: 560px;
    margin: 0 auto 32px;
    line-height: 1.7;
  }

  /* ---- 页脚 ---- */
  .site-footer {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 100%);
    padding: 72px 0 32px;
    margin-top: 88px;
  }

  .site-footer h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 16px;
  }

  .site-footer a {
    text-decoration: none;
    transition: color 0.25s ease, padding-left 0.25s ease;
  }

  .site-footer a:hover {
    color: #a5b4fc !important;
    padding-left: 2px;
  }

  .copyright {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    margin-top: 48px;
    padding-top: 24px;
    text-align: center;
  }

  .copyright p {
    font-size: 13px;
    color: rgba(148, 163, 184, 0.7);
  }

  /* ---- 面包屑 ---- */
  .breadcrumb-bar {
    background: transparent;
    margin-bottom: 24px;
  }

  .breadcrumb-bar a {
    color: var(--text-muted);
    font-size: 13.5px;
    text-decoration: none;
    transition: color 0.2s;
  }

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

  .breadcrumb-bar span {
    color: var(--primary);
    font-size: 13.5px;
    font-weight: 600;
  }

  .breadcrumb-bar i {
    color: #cbd5e1;
    font-size: 11px;
    margin: 0 8px;
  }

  /* ---- 平台信息卡 ---- */
  .info-list {
    margin-top: 16px;
  }

  .info-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 8px 0;
    font-size: 14.5px;
    color: var(--text-muted);
    line-height: 1.65;
  }

  .info-list li i {
    color: var(--primary);
    margin-top: 5px;
    font-size: 13px;
  }

  /* ---- 整理 ---- */
  .divider {
    height: 1px;
    background: var(--border);
    border: none;
    margin: 0;
  }

  a:focus-visible {
    outline: 3px solid rgba(99, 102, 241, 0.5);
    outline-offset: 2px;
    border-radius: 4px;
  }

  img {
    max-width: 100%;
    height: auto;
  }

  /* ---- 响应式 ---- */
  @media (max-width: 1024px) {
    :root {
      --space-section: 64px;
    }
    .section { padding: 64px 0; }
    .hero-title { font-size: 2.8rem; }
    .section-title { font-size: 1.9rem; }
  }

  @media (max-width: 768px) {
    .dock-nav {
      margin: 10px 12px 0;
      padding: 10px 16px;
      border-radius: 16px;
    }
    .hero-section {
      min-height: auto;
      margin-top: -72px;
      padding-top: 140px;
      padding-bottom: 40px;
      background-attachment: scroll;
    }
    .hero-content { padding: 40px 0; }
    .hero-title { font-size: 2.1rem; }
    .hero-desc { font-size: 15px; }
    .section-title { font-size: 1.7rem; }
    .cta-section { padding: 48px 24px; }
    .cta-title { font-size: 1.8rem; }
    .stat-num { font-size: 2rem; }
  }

  @media (max-width: 520px) {
    .dock-nav {
      margin: 8px 8px 0;
      padding: 10px 12px;
    }
    .container-custom {
      padding-left: 16px;
      padding-right: 16px;
    }
    .hero-title { font-size: 1.8rem; }
    .hero-badge-group { flex-direction: column; align-items: flex-start; }
    .section-title { font-size: 1.5rem; }
    .section-subtitle { font-size: 14.5px; }
    .btn { padding: 12px 24px; font-size: 14px; }
    .cta-section { padding: 40px 20px; border-radius: 16px; }
    .cta-title { font-size: 1.5rem; }
    .feature-card { padding: 28px 20px; }
    .content-body { padding: 20px; }
    .stats-section .grid { gap: 12px; }
    .stat-num { font-size: 1.7rem; }
    .faq-question { padding: 16px 18px; font-size: 14px; }
    .faq-answer { padding: 0 18px 16px; font-size: 14px; }
  }

/* roulang page: article */
:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --secondary: #06b6d4;
    --ink: #0f172a;
    --body: #f1f5f9;
    --card: #ffffff;
    --muted: #64748b;
    --border: #e2e8f0;
    --radius: 1rem;
    --shadow: 0 8px 30px rgba(15, 23, 42, 0.06);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    background: var(--body);
    color: var(--ink);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}
.container-custom {
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
    padding-left: 1.25rem;
    padding-right: 1.25rem;
}
.dock-nav {
    position: sticky;
    top: 1rem;
    z-index: 50;
    max-width: 1100px;
    margin: 1rem auto 0;
    padding: 0.75rem 1.5rem;
    background: rgba(255, 255, 255, 0.88);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(226, 232, 240, 0.8);
    border-radius: 1.25rem;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.06);
}
.nav-link {
    padding: 0.5rem 0.9rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: #475569;
    border-radius: 0.75rem;
    transition: all 0.2s ease;
    display: inline-block;
}
.nav-link:hover { background: #f1f5f9; color: #0f172a; }
.nav-link.active { background: linear-gradient(135deg, #eef2ff, #ecfeff); color: #4f46e5; font-weight: 600; }
.mobile-menu {
    display: none;
    max-width: 1100px;
    margin: 0.5rem auto 0;
    padding: 1rem 1.25rem;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 1rem;
    box-shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
}
.mobile-menu.open { display: block; }
.mobile-link {
    display: flex;
    padding: 0.65rem 0.75rem;
    font-size: 0.95rem;
    font-weight: 500;
    color: #334155;
    border-radius: 0.5rem;
    transition: all 0.2s;
}
.mobile-link:hover { background: #f8fafc; color: #4f46e5; }
.mobile-cta {
    display: flex;
    margin-top: 0.75rem;
    padding: 0.7rem 1rem;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    color: #fff;
    font-weight: 600;
    justify-content: center;
    border-radius: 0.75rem;
    transition: all 0.2s;
}
.mobile-cta:hover { background: linear-gradient(135deg, #4338ca, #0891b2); color: #fff; }
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 9999px;
    box-shadow: 0 8px 20px rgba(79, 70, 229, 0.25);
    transition: all 0.25s ease;
    text-decoration: none;
}
.cta-btn:hover { transform: translateY(-2px); box-shadow: 0 12px 28px rgba(79, 70, 229, 0.35); color: #fff; }
.cta-btn:focus-visible { outline: 3px solid rgba(79, 70, 229, 0.4); outline-offset: 2px; }
.cta-btn-white {
    display: inline-flex;
    align-items: center;
    padding: 0.75rem 1.75rem;
    background: #fff;
    color: #0f172a;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 9999px;
    transition: all 0.25s;
    text-decoration: none;
}
.cta-btn-white:hover { background: #f1f5f9; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(255, 255, 255, 0.2); color: #0f172a; }
.cta-btn-outline {
    display: inline-flex;
    align-items: center;
    padding: 0.7rem 1.75rem;
    border: 2px solid rgba(255, 255, 255, 0.5);
    color: #fff;
    font-weight: 600;
    font-size: 0.9rem;
    border-radius: 9999px;
    transition: all 0.25s;
    text-decoration: none;
}
.cta-btn-outline:hover { border-color: #fff; background: rgba(255, 255, 255, 0.1); color: #fff; }
.breadcrumb { display: flex; align-items: center; gap: 0.5rem; font-size: 0.8rem; color: #94a3b8; flex-wrap: wrap; }
.breadcrumb a { color: #94a3b8; transition: color 0.2s; text-decoration: none; }
.breadcrumb a:hover { color: #fff; }
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.9rem;
    font-size: 0.75rem;
    font-weight: 600;
    color: #fff;
    background: rgba(255, 255, 255, 0.18);
    border: 1px solid rgba(255, 255, 255, 0.25);
    border-radius: 9999px;
}
.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.3rem 0.85rem;
    font-size: 0.78rem;
    font-weight: 500;
    color: #4f46e5;
    background: #eef2ff;
    border: 1px solid #e0e7ff;
    border-radius: 9999px;
    transition: all 0.2s;
}
.tag:hover { background: #e0e7ff; }
.article-content { font-size: 1rem; color: #334155; line-height: 1.9; word-break: break-word; }
.article-content h2 { font-size: 1.5rem; font-weight: 700; color: #0f172a; margin: 2.25rem 0 1rem; padding-bottom: 0.6rem; border-bottom: 2px solid #eef2ff; }
.article-content h3 { font-size: 1.25rem; font-weight: 600; color: #1e293b; margin: 2rem 0 0.75rem; }
.article-content p { margin-bottom: 1.3rem; }
.article-content img { border-radius: 1rem; margin: 1.75rem 0; box-shadow: 0 10px 25px rgba(15, 23, 42, 0.08); max-width: 100%; height: auto; }
.article-content ul, .article-content ol { padding-left: 1.5rem; margin-bottom: 1.3rem; }
.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }
.article-content li { margin-bottom: 0.5rem; }
.article-content a { color: #4f46e5; text-decoration: underline; text-underline-offset: 2px; }
.article-content a:hover { color: #4338ca; }
.article-content blockquote { border-left: 4px solid #4f46e5; background: #f8fafc; padding: 1rem 1.5rem; border-radius: 0 0.75rem 0.75rem 0; margin: 1.75rem 0; color: #475569; }
.article-content table { width: 100%; border-collapse: collapse; margin: 1.75rem 0; border-radius: 0.75rem; overflow: hidden; }
.article-content th { background: #f8fafc; color: #0f172a; font-weight: 600; padding: 0.75rem 1rem; border: 1px solid #e2e8f0; text-align: left; }
.article-content td { padding: 0.75rem 1rem; border: 1px solid #e2e8f0; }
.related-card {
    display: block;
    border-radius: 1rem;
    background: #fff;
    border: 1px solid #e2e8f0;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(15, 23, 42, 0.04);
    transition: all 0.3s ease;
    text-decoration: none;
}
.related-card:hover { transform: translateY(-6px); box-shadow: 0 16px 32px rgba(15, 23, 42, 0.1); border-color: #c7d2fe; }
.related-card-img { width: 100%; height: 160px; object-fit: cover; transition: transform 0.5s; }
.related-card:hover .related-card-img { transform: scale(1.04); }
.related-tag { display: inline-block; padding: 0.2rem 0.7rem; font-size: 0.7rem; font-weight: 600; color: #06b6d4; background: #ecfeff; border-radius: 9999px; }
.related-title { margin-top: 0.75rem; font-size: 1rem; font-weight: 700; color: #0f172a; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-desc { margin-top: 0.5rem; font-size: 0.85rem; color: #64748b; line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pager-link {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.65rem 1.4rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: #475569;
    background: #fff;
    border: 1px solid #e2e8f0;
    border-radius: 0.75rem;
    transition: all 0.2s;
    text-decoration: none;
}
.pager-link:hover { border-color: #c7d2fe; color: #4f46e5; box-shadow: 0 4px 12px rgba(79, 70, 229, 0.08); transform: translateY(-2px); }
.pager-link:focus-visible { outline: 3px solid rgba(79, 70, 229, 0.4); outline-offset: 2px; }
.section-head { text-align: center; max-width: 600px; margin: 0 auto 3rem; }
.section-eyebrow { display: inline-block; font-size: 0.78rem; font-weight: 700; letter-spacing: 0.08em; color: #4f46e5; background: #eef2ff; padding: 0.3rem 1rem; border-radius: 9999px; margin-bottom: 0.75rem; }
.section-head h2 { font-size: 2rem; font-weight: 800; color: #0f172a; line-height: 1.2; margin-top: 0.5rem; }
.section-head p { margin-top: 0.75rem; color: #64748b; font-size: 0.95rem; }
.cta-section { padding: 4rem 0; }
.cta-card {
    position: relative;
    padding: 3.5rem 2rem;
    border-radius: 1.5rem;
    background: linear-gradient(135deg, #4f46e5, #06b6d4);
    text-align: center;
    color: #fff;
    overflow: hidden;
    box-shadow: 0 20px 50px rgba(79, 70, 229, 0.3);
}
.cta-card h2 { font-size: 2rem; font-weight: 800; }
.cta-card p { margin-top: 0.75rem; color: rgba(255, 255, 255, 0.85); max-width: 480px; margin-left: auto; margin-right: auto; }
.cta-card .flex { justify-content: center; margin-top: 2rem; }
.site-footer { background: #0f172a; padding: 4rem 0 2rem; margin-top: 4rem; }
.copyright { border-top: 1px solid rgba(255, 255, 255, 0.08); margin-top: 3rem; padding-top: 2rem; text-align: center; font-size: 0.8rem; color: #64748b; }
.not-found {
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 4rem 1rem;
}
@media (max-width: 768px) {
    .dock-nav { top: 0.5rem; margin: 0.5rem 0.75rem 0; padding: 0.55rem 1rem; border-radius: 1rem; }
    .section-head h2 { font-size: 1.5rem; }
    .cta-card h2 { font-size: 1.5rem; }
    .cta-card { padding: 2.5rem 1.5rem; }
    .article-content { font-size: 0.95rem; }
    .article-content h2 { font-size: 1.3rem; }
    .article-content h3 { font-size: 1.1rem; }
}
@media (max-width: 520px) {
    .container-custom { padding-left: 1rem; padding-right: 1rem; }
    .article-main .article-card { padding: 1.25rem; }
    .cta-card { padding: 2rem 1.2rem; }
    .cta-card h2 { font-size: 1.3rem; }
}

/* roulang page: category2 */
:root {
  --bg-body: #f8fafc;
  --bg-white: #ffffff;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --border-light: #e2e8f0;
  --primary: #4f46e5;
  --primary-dark: #4338ca;
  --accent: #06b6d4;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.5rem;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06);
  --shadow-md: 0 4px 16px rgba(15,23,42,.08);
  --shadow-lg: 0 8px 30px rgba(15,23,42,.10);
  --transition: all .25s cubic-bezier(.4,0,.2,1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
  background-color: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

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

.container-custom {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 浮动 Dock 导航 ===== */
.dock-nav {
  position: sticky;
  top: 16px;
  z-index: 50;
  max-width: 1080px;
  margin: 16px auto 0;
  padding: 10px 20px;
  background: rgba(255,255,255,.86);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border: 1px solid rgba(226,232,240,.8);
  border-radius: 999px;
  box-shadow: 0 4px 24px rgba(15,23,42,.08), inset 0 1px 0 rgba(255,255,255,.7);
  transition: var(--transition);
}

.dock-nav.scrolled {
  box-shadow: 0 8px 32px rgba(15,23,42,.12), inset 0 1px 0 rgba(255,255,255,.7);
  background: rgba(255,255,255,.94);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 500;
  color: #475569;
  border-radius: 999px;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(99,102,241,.08);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(99,102,241,.12);
  font-weight: 600;
}

.nav-link.active::before {
  content: '';
  display: inline-block;
  width: 6px;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  margin-right: 8px;
}

.cta-desktop {
  background: linear-gradient(135deg, #4f46e5, #06b6d4);
  border: none;
}

.cta-desktop:hover {
  transform: translateY(-1px);
}

.mobile-btn {
  transition: var(--transition);
}

.mobile-btn:hover {
  background: #eef2ff !important;
  color: var(--primary) !important;
}

.mobile-menu {
  position: fixed;
  top: 0;
  right: -320px;
  width: 300px;
  height: 100vh;
  background: #fff;
  z-index: 100;
  box-shadow: -12px 0 40px rgba(15,23,42,.15);
  transition: right .3s cubic-bezier(.4,0,.2,1);
  display: flex;
  flex-direction: column;
  padding: 28px 24px;
}

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

.mobile-menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(15,23,42,.5);
  backdrop-filter: blur(4px);
  z-index: 99;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
}

.mobile-menu-overlay.open {
  opacity: 1;
  visibility: visible;
}

/* ===== Hero Banner ===== */
.category-hero {
  position: relative;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  padding: 100px 0 90px;
  overflow: hidden;
}

.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(15,23,42,.92) 10%, rgba(30,27,75,.82) 45%, rgba(8,51,68,.55) 90%);
  z-index: 1;
}

.category-hero::after {
  content: '';
  position: absolute;
  top: -60%;
  right: -20%;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(99,102,241,.25) 0%, transparent 70%);
  z-index: 2;
}

.category-hero .hero-content {
  position: relative;
  z-index: 3;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 18px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.2);
  color: #fff;
  backdrop-filter: blur(10px);
}

.hero-badge i {
  color: #67e8f9;
}

/* ===== 通用板块 ===== */
.section {
  padding: 80px 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(1.85rem, 4vw, 2.5rem);
  font-weight: 800;
  line-height: 1.2;
  color: #0f172a;
  letter-spacing: -0.02em;
}

.section-subtitle {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 640px;
  line-height: 1.7;
}

/* ===== 卡片 ===== */
.icon-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  height: 100%;
}

.icon-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(99,102,241,.3);
}

.icon-card .icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 18px;
  background: linear-gradient(135deg, #eef2ff, #ecfeff);
  color: var(--primary);
}

/* 策略卡片 */
.strategy-card {
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-light);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.strategy-card .thumb {
  position: relative;
  overflow: hidden;
  height: 210px;
}

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

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

.strategy-card .thumb .tag {
  position: absolute;
  top: 12px;
  left: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: rgba(15,23,42,.72);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 5px 12px;
  border-radius: 999px;
}

.strategy-card .card-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

/* ===== 数据洞察 ===== */
.insight-panel {
  background: linear-gradient(140deg, #1e1b4b, #0f172a 60%, #083344);
  border-radius: var(--radius-xl);
  padding: 60px 48px;
  position: relative;
  overflow: hidden;
  color: #fff;
}

.insight-panel::before {
  content: '';
  position: absolute;
  top: -100px;
  right: -80px;
  width: 320px;
  height: 320px;
  border-radius: 50%;
  background: rgba(99,102,241,.2);
  filter: blur(60px);
}

.stat-item {
  text-align: center;
  padding: 24px 16px;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 2.75rem);
  font-weight: 800;
  background: linear-gradient(135deg, #a5b4fc, #67e8f9);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.1;
}

.stat-label {
  margin-top: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.7);
}

/* ===== 步骤列表 ===== */
.steps-list {
  position: relative;
}

.steps-list .step-item {
  display: flex;
  gap: 20px;
  padding: 20px 0;
}

.steps-list .step-item:not(:last-child) {
  border-bottom: 1px dashed var(--border-light);
}

.step-num {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 16px;
  background: linear-gradient(135deg, #eef2ff, #ecfeff);
  color: var(--primary);
  border: 1px solid rgba(99,102,241,.15);
}

/* ===== 技巧列表 ===== */
.tip-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.tip-list li {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
}

.tip-list li:last-child {
  border-bottom: none;
}

.tip-list i {
  color: #67e8f9;
  font-size: 15px;
  margin-top: 5px;
  flex-shrink: 0;
}

/* ===== FAQ ===== */
.faq-item {
  background: #fff;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  margin-bottom: 12px;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: rgba(99,102,241,.25);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  background: none;
  border: none;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  text-align: left;
}

.faq-question i {
  transition: transform .3s ease;
  color: var(--text-muted);
  font-size: 14px;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: var(--primary);
}

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

.faq-answer-inner {
  padding: 0 20px 18px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.7;
}

/* ===== CTA ===== */
.cta-panel {
  background: linear-gradient(135deg, #4f46e5, #2563eb, #06b6d4);
  border-radius: var(--radius-xl);
  padding: 56px 48px;
  position: relative;
  overflow: hidden;
  text-align: center;
  color: #fff;
}

.cta-panel::before {
  content: '';
  position: absolute;
  top: -40%;
  left: -10%;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}

.cta-panel::after {
  content: '';
  position: absolute;
  bottom: -60%;
  right: -10%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: rgba(255,255,255,.05);
}

.cta-btn {
  position: relative;
  z-index: 2;
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #fff;
  color: #4f46e5;
  font-weight: 700;
  font-size: 16px;
  padding: 16px 36px;
  border-radius: 999px;
  box-shadow: 0 8px 30px rgba(0,0,0,.2);
  transition: var(--transition);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0,0,0,.25);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #0f172a;
  padding: 60px 0 0;
  margin-top: 80px;
}

.copyright {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  margin-top: 48px;
  text-align: center;
  font-size: 13px;
  color: #64748b;
}

/* ===== 图集 ===== */
.guide-gallery img {
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.guide-gallery img:hover {
  transform: scale(1.02);
  box-shadow: var(--shadow-md);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .section { padding: 64px 0; }
  .insight-panel { padding: 48px 36px; }
}

@media (max-width: 768px) {
  .dock-nav {
    top: 10px;
    margin: 10px 16px 0;
    border-radius: 24px;
    padding: 12px 16px;
  }

  .container-custom {
    padding: 0 20px;
  }

  .category-hero {
    padding: 76px 0 64px;
  }

  .section { padding: 52px 0; }

  .insight-panel {
    padding: 36px 24px;
    border-radius: 20px;
  }

  .cta-panel {
    padding: 44px 24px;
    border-radius: 20px;
  }

  .nav-links {
    display: none !important;
  }

  .cta-desktop {
    display: none !important;
  }
}

@media (max-width: 520px) {
  .dock-nav {
    margin: 8px 12px 0;
    border-radius: 20px;
  }

  .container-custom {
    padding: 0 16px;
  }

  .section-title {
    font-size: 1.6rem;
  }

  .category-hero {
    padding: 60px 0 48px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .strategy-card .thumb {
    height: 170px;
  }

  .cta-btn {
    width: 100%;
    justify-content: center;
    padding: 14px 24px;
    font-size: 15px;
  }
}

/* 焦点可见性 */
a:focus-visible, button:focus-visible {
  outline: 3px solid rgba(99,102,241,.35);
  outline-offset: 2px;
}

/* 减少动态 */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
}