/* roulang page: index */
:root {
    --brand: #2563EB;
    --brand-deep: #1E3A5F;
    --brand-accent: #F97316;
    --brand-sky: #0EA5E9;
    --page-bg: #F8FAFC;
    --ink: #0F172A;
    --body: #334155;
    --muted: #64748B;
    --line: #E2E8F0;
    --radius-xl: 12px;
    --radius-lg: 8px;
    --shadow-card: 0 1px 3px rgba(15,23,42,0.06);
    --shadow-hover: 0 12px 24px -8px rgba(15,23,42,0.12);
  }
  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    background: var(--page-bg);
    color: var(--body);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
  }
  img { max-width: 100%; display: block; }
  a { color: inherit; text-decoration: none; transition: color 0.2s ease; }
  button { font-family: inherit; cursor: pointer; border: none; background: none; }
  .container { max-width: 1280px; margin: 0 auto; padding: 0 24px; }
  @media (max-width:768px){ .container{ padding: 0 16px; } }

  .nav-wrap {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,0.86);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(226,232,240,0.8);
  }
  .nav-inner { height: 64px; display: flex; align-items: center; justify-content: space-between; }
  .logo-text { font-size: 20px; font-weight: 800; color: var(--ink); letter-spacing: -0.02em; }
  .logo-text .hl { color: var(--brand); }
  .logo-sub { font-size: 12px; color: var(--muted); font-weight: 500; letter-spacing: 0.08em; margin-left: 2px; }
  .nav-links { display: flex; align-items: center; gap: 6px; }
  .nav-link {
    font-size: 15px; font-weight: 500; color: var(--body);
    padding: 8px 14px; border-radius: 8px; transition: all 0.2s ease;
    position: relative;
  }
  .nav-link:hover { color: var(--brand); background: rgba(37,99,235,0.06); }
  .nav-link.active { color: var(--brand); font-weight: 600; }
  .nav-link.active::after {
    content: ""; position: absolute; left: 14px; right: 14px; bottom: 2px;
    height: 2px; background: var(--brand); border-radius: 2px;
  }
  .btn-primary {
    background: var(--brand); color: #fff; font-size: 15px; font-weight: 600;
    padding: 10px 22px; border-radius: 8px; transition: all 0.2s ease;
    display: inline-flex; align-items: center; gap: 6px;
  }
  .btn-primary:hover { background: #1d4ed8; transform: translateY(-1px); box-shadow: 0 8px 16px -4px rgba(37,99,235,0.35); }
  .btn-primary:focus { outline: none; box-shadow: 0 0 0 4px rgba(37,99,235,0.2); }
  .btn-primary:active { transform: scale(0.97); }
  .btn-outline {
    background: transparent; color: var(--brand); font-size: 15px; font-weight: 600;
    padding: 10px 22px; border-radius: 8px; border: 1.5px solid var(--brand);
    transition: all 0.2s ease; display: inline-flex; align-items: center; gap: 6px;
  }
  .btn-outline:hover { background: rgba(37,99,235,0.08); border-color: #1d4ed8; }
  .btn-outline:focus { outline: none; box-shadow: 0 0 0 4px rgba(37,99,235,0.15); }
  .btn-outline:active { transform: scale(0.97); }
  .btn-white {
    background: #fff; color: var(--brand); font-size: 16px; font-weight: 700;
    padding: 14px 32px; border-radius: 8px; transition: all 0.2s ease;
    display: inline-flex; align-items: center; gap: 8px;
  }
  .btn-white:hover { background: var(--brand-accent); color: #fff; transform: translateY(-1px); }
  .btn-white:focus { outline: none; box-shadow: 0 0 0 4px rgba(255,255,255,0.25); }
  .btn-white:active { transform: scale(0.97); }

  .mobile-menu-btn { display: none; padding: 8px; border-radius: 8px; }
  .mobile-menu-btn:hover { background: rgba(15,23,42,0.06); }
  @media (max-width: 900px) {
    .nav-links { display: none; }
    .mobile-menu-btn { display: block; }
  }
  .mobile-drawer { display: none; background: #fff; border-bottom: 1px solid var(--line); }
  .mobile-drawer.open { display: block; }
  .mobile-drawer a {
    display: block; padding: 14px 20px; font-size: 16px; font-weight: 500;
    border-bottom: 1px solid #F1F5F9; color: var(--body);
  }
  .mobile-drawer a:hover { background: #F8FAFC; color: var(--brand); }
  .mobile-drawer a.active { color: var(--brand); font-weight: 600; }
  .mobile-drawer .drawer-cta { padding: 16px 20px; }

  .hero-section {
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #F0F6FF;
    position: relative;
  }
  .hero-section::before {
    content: "";
    position: absolute; inset: 0;
    background: rgba(248,250,252,0.82);
  }
  .hero-inner { position: relative; z-index: 1; padding: 96px 0; }
  .hero-title { font-size: 42px; line-height: 1.2; font-weight: 800; color: var(--ink); letter-spacing: -0.02em; }
  .hero-title .hl { color: var(--brand); }
  .hero-sub { font-size: 17px; color: var(--body); max-width: 500px; margin-top: 20px; line-height: 1.8; }
  .hero-img-wrap { border-radius: 16px; overflow: hidden; box-shadow: 0 24px 48px -12px rgba(15,23,42,0.18); transform: rotate(1deg); transition: transform 0.3s ease; }
  .hero-img-wrap:hover { transform: rotate(0deg) scale(1.01); }
  @media (max-width: 1024px) {
    .hero-title { font-size: 34px; }
    .hero-inner { padding: 64px 0; }
  }
  @media (max-width: 640px) {
    .hero-title { font-size: 28px; }
    .hero-inner { padding: 48px 0; }
  }

  .section { padding: 80px 0; }
  @media (max-width: 1024px) { .section { padding: 60px 0; } }
  .section-head { text-align: center; max-width: 720px; margin: 0 auto 52px; }
  .section-tag {
    display: inline-block; background: rgba(37,99,235,0.08); color: var(--brand);
    font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 999px; margin-bottom: 12px;
  }
  .section-title { font-size: 28px; font-weight: 800; color: var(--ink); line-height: 1.3; letter-spacing: -0.01em; }
  .section-desc { font-size: 16px; color: var(--muted); margin-top: 12px; }

  .stat-card { background: #fff; border: 1px solid var(--line); border-radius: 12px; padding: 24px; text-align: center; transition: all 0.2s ease; }
  .stat-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
  .stat-num { font-size: 36px; font-weight: 800; color: var(--brand); line-height: 1.2; }
  .stat-label { font-size: 14px; color: var(--muted); margin-top: 8px; }

  .price-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
  @media (max-width: 768px) { .price-grid { grid-template-columns: 1fr; gap: 16px; } }
  .price-card {
    background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 32px 28px;
    position: relative; display: flex; flex-direction: column; transition: all 0.25s ease;
  }
  .price-card.popular {
    border: 2px solid var(--brand);
    box-shadow: 0 16px 32px -8px rgba(37,99,235,0.16);
    transform: translateY(-8px);
  }
  @media (max-width:768px){ .price-card.popular{ transform:none; } }
  .price-card:hover { box-shadow: var(--shadow-hover); }
  .badge-popular {
    position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
    background: var(--brand-accent); color: #fff; font-size: 12px; font-weight: 700;
    padding: 4px 16px; border-radius: 999px; white-space: nowrap;
  }
  .price-name { font-size: 18px; font-weight: 700; color: var(--ink); }
  .price-amount { font-size: 40px; font-weight: 800; color: var(--ink); margin: 16px 0 4px; }
  .price-amount small { font-size: 16px; font-weight: 500; color: var(--muted); }
  .price-features { list-style: none; margin-top: 20px; flex: 1; }
  .price-features li { display: flex; align-items: flex-start; gap: 10px; padding: 7px 0; font-size: 14px; color: var(--body); }
  .price-features .tick { color: var(--brand); flex-shrink: 0; margin-top: 3px; }
  .price-features .cross { color: #CBD5E1; flex-shrink: 0; margin-top: 3px; }

  .highlight-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 24px; }
  @media (max-width: 1024px) { .highlight-grid { grid-template-columns: 1fr 1fr; } }
  @media (max-width: 640px) { .highlight-grid { grid-template-columns: 1fr; } }
  .highlight-card {
    background: #fff; border: 1px solid var(--line); border-radius: 16px; padding: 32px;
    position: relative; transition: all 0.25s ease;
  }
  .highlight-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
  .highlight-card.large { grid-row: span 2; }
  .highlight-icon {
    width: 48px; height: 48px; border-radius: 12px; background: rgba(37,99,235,0.1);
    display: flex; align-items: center; justify-content: center; margin-bottom: 20px;
  }
  .highlight-card h3 { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
  .highlight-card p { font-size: 14px; color: var(--muted); line-height: 1.7; }
  .highlight-list { list-style: none; margin-top: 12px; }
  .highlight-list li { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--body); padding: 5px 0; }
  .highlight-list li::before { content: "✓"; color: var(--brand); font-weight: 700; flex-shrink: 0; }
  .mark-hot {
    position: absolute; top: 16px; right: 16px; background: rgba(249,115,22,0.1);
    color: var(--brand-accent); font-size: 12px; font-weight: 600;
    padding: 3px 12px; border-radius: 999px;
  }

  .preview-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
  @media (max-width: 1024px) { .preview-grid { grid-template-columns: repeat(2, 1fr); } }
  @media (max-width: 640px) { .preview-grid { grid-template-columns: 1fr; } }
  .preview-card {
    border-radius: 14px; overflow: hidden; background: #fff;
    border: 1px solid var(--line); position: relative;
    transition: all 0.25s ease;
  }
  .preview-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
  .preview-thumb { position: relative; height: 200px; overflow: hidden; }
  .preview-thumb img { width: 100%; height: 100%; object-fit: cover; }
  .preview-lock {
    position: absolute; inset: 0; background: rgba(37,99,235,0.14);
    display: flex; align-items: center; justify-content: center; transition: background 0.25s ease;
  }
  .preview-card:hover .preview-lock { background: rgba(37,99,235,0.08); }
  .lock-badge {
    background: rgba(255,255,255,0.92); color: var(--brand); font-size: 13px; font-weight: 600;
    padding: 6px 16px; border-radius: 999px; display: inline-flex; align-items: center; gap: 6px;
    box-shadow: 0 4px 12px rgba(15,23,42,0.12);
  }
  .preview-body { padding: 20px; }
  .preview-body h3 { font-size: 16px; font-weight: 600; color: var(--ink); margin-bottom: 6px; }
  .preview-body p { font-size: 13px; color: var(--muted); line-height: 1.6; }
  .unlock-link {
    display: inline-flex; align-items: center; gap: 4px; font-size: 14px; font-weight: 600;
    color: var(--brand); margin-top: 12px; transition: color 0.2s ease;
  }
  .unlock-link:hover { color: var(--brand-accent); }

  .news-section { background: #fff; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
  .news-layout { display: grid; grid-template-columns: 1.1fr 1fr; gap: 32px; align-items: start; }
  @media (max-width: 768px) { .news-layout { grid-template-columns: 1fr; } }
  .news-feature {
    background: #fff; border: 1px solid var(--line); border-radius: 16px; overflow: hidden;
    transition: all 0.25s ease;
  }
  .news-feature:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
  .news-feature-img { height: 240px; overflow: hidden; }
  .news-feature-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
  .news-feature:hover .news-feature-img img { transform: scale(1.04); }
  .news-feature-body { padding: 24px; }
  .news-feature-body h3 { font-size: 20px; font-weight: 700; color: var(--ink); line-height: 1.4; }
  .news-feature-body h3 a:hover { color: var(--brand); }
  .news-feature-body p { font-size: 15px; color: var(--muted); margin-top: 10px; }
  .news-list-item {
    display: flex; gap: 16px; padding: 16px 0;
    border-bottom: 1px solid #F1F5F9; transition: background 0.2s ease;
  }
  .news-list-item:last-child { border-bottom: none; }
  .news-list-item:hover { background: #F8FAFC; }
  .news-list-thumb { width: 100px; height: 72px; border-radius: 8px; overflow: hidden; flex-shrink: 0; }
  .news-list-thumb img { width: 100%; height: 100%; object-fit: cover; }
  .news-list-body { flex: 1; }
  .news-list-body h4 { font-size: 15px; font-weight: 600; color: var(--ink); line-height: 1.4; }
  .news-list-body h4 a:hover { color: var(--brand); }
  .news-list-body p { font-size: 13px; color: var(--muted); margin-top: 4px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
  .news-meta { display: flex; align-items: center; gap: 10px; font-size: 12px; color: #94A3B8; margin-top: 6px; }
  .badge-cat {
    background: rgba(37,99,235,0.08); color: var(--brand); font-size: 12px; font-weight: 600;
    padding: 2px 10px; border-radius: 6px;
  }
  .empty-state {
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding: 60px 20px; border: 1px dashed var(--line); border-radius: 16px;
    background: #F8FAFC; color: var(--muted); font-size: 15px;
  }
  .empty-state svg { color: #CBD5E1; margin-bottom: 12px; }

  .faq-item {
    background: #fff; border: 1px solid var(--line); border-radius: 12px;
    margin-bottom: 12px; overflow: hidden; transition: box-shadow 0.2s ease;
  }
  .faq-item:hover { box-shadow: var(--shadow-card); }
  .faq-q {
    display: flex; align-items: center; justify-content: space-between;
    padding: 20px 24px; font-size: 16px; font-weight: 600; color: var(--ink);
    cursor: pointer; transition: color 0.2s ease; width: 100%; text-align: left;
  }
  .faq-q:hover { color: var(--brand); }
  .faq-icon {
    width: 24px; height: 24px; border-radius: 6px; background: rgba(37,99,235,0.08);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
    transition: transform 0.3s ease;
  }
  .faq-item.open .faq-icon { transform: rotate(45deg); }
  .faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
  .faq-a-inner { padding: 0 24px 20px; font-size: 14px; color: var(--muted); line-height: 1.75; background: #F8FAFC; margin: 0 8px 8px; border-radius: 8px; }
  .faq-item.open .faq-a { max-height: 200px; }

  .cta-section {
    background: linear-gradient(135deg, #2563EB 0%, #1E3A5F 100%);
    padding: 80px 0; color: #fff; text-align: center;
  }
  .cta-title { font-size: 32px; font-weight: 800; line-height: 1.3; }
  .cta-sub { font-size: 16px; opacity: 0.85; margin-top: 12px; max-width: 560px; margin-left: auto; margin-right: auto; }
  .cta-price-row { display: flex; justify-content: center; gap: 24px; margin-top: 32px; flex-wrap: wrap; }
  .cta-price-tag {
    background: rgba(255,255,255,0.1); border: 1px solid rgba(255,255,255,0.2);
    padding: 14px 28px; border-radius: 12px; backdrop-filter: blur(4px);
    transition: all 0.2s ease;
  }
  .cta-price-tag:hover { background: rgba(255,255,255,0.18); transform: translateY(-2px); }
  .cta-price-tag .price { font-size: 22px; font-weight: 800; }
  .cta-price-tag .desc { font-size: 13px; opacity: 0.75; }
  .cta-btn-wrap { margin-top: 36px; }

  .footer {
    background: #0F172A; color: rgba(255,255,255,0.7); padding: 64px 0 0;
    font-size: 14px;
  }
  .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; padding-bottom: 48px; }
  @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px; } }
  @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }
  .footer-logo { font-size: 22px; font-weight: 800; color: #fff; }
  .footer-logo .hl { color: #60A5FA; }
  .footer-desc { margin-top: 12px; line-height: 1.7; color: rgba(255,255,255,0.55); }
  .footer-title { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 14px; }
  .footer-links { list-style: none; }
  .footer-links li { padding: 4px 0; }
  .footer-links a { color: rgba(255,255,255,0.55); transition: color 0.2s ease; }
  .footer-links a:hover { color: #fff; }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0;
    display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 12px;
    font-size: 13px; color: rgba(255,255,255,0.4);
  }
  .footer-social { display: flex; gap: 16px; align-items: center; }
  .footer-social a { color: rgba(255,255,255,0.5); transition: color 0.2s ease; }
  .footer-social a:hover { color: #fff; }

  .reveal { opacity: 0; transform: translateY(16px); transition: opacity 0.6s ease, transform 0.6s ease; }
  .reveal.visible { opacity: 1; transform: translateY(0); }

  @media (max-width: 640px) {
    .section-title { font-size: 24px; }
    .cta-title { font-size: 26px; }
    .hero-title { font-size: 28px; }
    .preview-thumb { height: 180px; }
    .price-amount { font-size: 32px; }
  }

/* roulang page: category1 */
:root {
      --primary: #2563EB;
      --night: #1E3A5F;
      --accent: #F97316;
      --sky: #0EA5E9;
      --paper: #F8FAFC;
      --card: #FFFFFF;
      --heading: #0F172A;
      --body: #334155;
      --muted: #64748B;
      --border: #E2E8F0;
      --radius: 12px;
      --shadow: 0 1px 3px rgba(15, 23, 42, .08);
      --shadow-hover: 0 12px 24px rgba(15, 23, 42, .10);
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      font-size: 16px;
      line-height: 1.75;
      color: var(--body);
      background: var(--paper);
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color .2s ease;
    }

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

    .container {
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 16px;
      }
    }

    /* Header */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, .88);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, .7);
      height: 64px;
      display: flex;
      align-items: center;
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      width: 100%;
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 24px;
    }

    @media (max-width: 768px) {
      .header-inner {
        padding: 0 16px;
      }
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }

    .logo-icon {
      width: 34px;
      height: 34px;
      border-radius: 10px;
      background: linear-gradient(135deg, #2563EB 0%, #0EA5E9 100%);
      display: flex;
      align-items: center;
      justify-content: center;
      box-shadow: 0 4px 10px rgba(37, 99, 235, .25);
    }

    .logo-icon svg {
      width: 18px;
      height: 18px;
      color: #fff;
    }

    .logo-text {
      font-size: 19px;
      font-weight: 800;
      color: var(--heading);
      letter-spacing: .5px;
    }

    .logo-text .sub {
      font-size: 13px;
      font-weight: 500;
      color: var(--muted);
      margin-left: 2px;
    }

    .nav-links {
      display: flex;
      align-items: center;
      gap: 28px;
    }

    .nav-link {
      font-size: 15px;
      font-weight: 500;
      color: var(--body);
      padding: 6px 0;
      position: relative;
      transition: color .2s;
    }

    .nav-link::after {
      content: '';
      position: absolute;
      left: 0;
      bottom: 0;
      width: 0;
      height: 2px;
      border-radius: 2px;
      background: var(--primary);
      transition: width .25s ease;
    }

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

    .nav-link:hover::after {
      width: 100%;
    }

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

    .nav-link.active::after {
      width: 100%;
    }

    .btn-primary {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary);
      color: #fff !important;
      font-size: 14px;
      font-weight: 600;
      padding: 9px 20px;
      border-radius: 8px;
      transition: background .2s, transform .15s;
      box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
    }

    .btn-primary:hover {
      background: #1d4ed8;
      transform: translateY(-1px);
    }

    .btn-primary:active {
      transform: scale(.97);
    }

    .btn-outline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      border: 1.5px solid var(--primary);
      color: var(--primary) !important;
      font-size: 15px;
      font-weight: 600;
      padding: 12px 28px;
      border-radius: 8px;
      background: transparent;
      transition: all .2s;
    }

    .btn-outline:hover {
      background: rgba(37, 99, 235, .08);
      border-color: #1d4ed8;
    }

    .btn-white {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: #fff;
      color: var(--primary) !important;
      font-size: 16px;
      font-weight: 700;
      padding: 14px 36px;
      border-radius: 8px;
      transition: all .2s;
      box-shadow: 0 4px 14px rgba(0, 0, 0, .12);
    }

    .btn-white:hover {
      background: var(--accent);
      color: #fff !important;
      transform: translateY(-2px);
    }

    .hamburger {
      display: none;
      width: 40px;
      height: 40px;
      border-radius: 8px;
      border: 1px solid var(--border);
      align-items: center;
      justify-content: center;
      background: #fff;
    }

    @media (max-width: 1023px) {
      .nav-links {
        display: none;
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        gap: 4px;
        padding: 16px 20px 24px;
        box-shadow: 0 16px 40px rgba(15, 23, 42, .12);
        border-bottom: 1px solid var(--border);
      }

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

      .nav-link {
        padding: 12px 8px;
        width: 100%;
        border-radius: 8px;
      }

      .nav-link:hover {
        background: var(--paper);
      }

      .btn-primary {
        margin-top: 12px;
        justify-content: center;
        width: 100%;
      }

      .hamburger {
        display: flex;
      }
    }

    /* Hero */
    .category-hero {
      position: relative;
      background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 50%, #E0F2FE 100%);
      padding: 80px 0 72px;
      overflow: hidden;
    }

    .category-hero::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
      opacity: .12;
      z-index: 0;
    }

    .category-hero::after {
      content: '';
      position: absolute;
      top: -60px;
      right: -60px;
      width: 300px;
      height: 300px;
      background: radial-gradient(circle, rgba(14, 165, 233, .18) 0%, transparent 70%);
      pointer-events: none;
    }

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

    .hero-grid {
      display: grid;
      grid-template-columns: 1.05fr .95fr;
      gap: 60px;
      align-items: center;
    }

    @media (max-width: 900px) {
      .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
      }
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(37, 99, 235, .1);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 5px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
    }

    .hero-badge .dot {
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--accent);
      animation: pulse 2s infinite;
    }

    @keyframes pulse {
      0%,
      100% {
        opacity: 1;
        transform: scale(1);
      }
      50% {
        opacity: .5;
        transform: scale(.8);
      }
    }

    .category-hero h1 {
      font-size: 44px;
      line-height: 1.2;
      font-weight: 800;
      color: var(--heading);
      letter-spacing: -0.5px;
      margin-bottom: 18px;
    }

    @media (max-width: 768px) {
      .category-hero h1 {
        font-size: 30px;
      }
    }

    .category-hero h1 .hl {
      color: var(--primary);
      position: relative;
    }

    .hero-desc {
      font-size: 17px;
      color: var(--body);
      max-width: 520px;
      line-height: 1.8;
      margin-bottom: 32px;
    }

    .hero-actions {
      display: flex;
      gap: 16px;
      flex-wrap: wrap;
    }

    .hero-image-wrap {
      position: relative;
    }

    .hero-image-wrap img {
      border-radius: 20px;
      box-shadow: 0 24px 60px rgba(15, 23, 42, .15);
      width: 100%;
      height: 340px;
      object-fit: cover;
    }

    .hero-float-card {
      position: absolute;
      bottom: -20px;
      left: -20px;
      background: #fff;
      border-radius: 14px;
      padding: 14px 20px;
      box-shadow: 0 12px 30px rgba(15, 23, 42, .12);
      display: flex;
      align-items: center;
      gap: 12px;
      border: 1px solid var(--border);
    }

    .hero-float-card .value {
      font-size: 22px;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
    }

    .hero-float-card .label {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.3;
    }

    @media (max-width: 520px) {
      .hero-float-card {
        left: 8px;
        bottom: -14px;
        padding: 10px 14px;
      }
    }

    .section {
      padding: 80px 0;
    }

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

    .section-head {
      margin-bottom: 44px;
      max-width: 720px;
    }

    .section-head.center {
      margin-left: auto;
      margin-right: auto;
      text-align: center;
    }

    .section-tag {
      display: inline-inline-flex;
      background: rgba(37, 99, 235, .08);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: 999px;
      letter-spacing: .5px;
      margin-bottom: 14px;
    }

    .section-head h2 {
      font-size: 30px;
      font-weight: 800;
      color: var(--heading);
      line-height: 1.25;
      margin-bottom: 12px;
    }

    @media (max-width: 768px) {
      .section-head h2 {
        font-size: 24px;
      }
    }

    .section-head p {
      font-size: 16px;
      color: var(--muted);
      line-height: 1.75;
    }

    /* Tags */
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      justify-content: center;
      margin-top: 10px;
    }

    .tag-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 999px;
      padding: 8px 22px;
      font-size: 15px;
      font-weight: 500;
      color: var(--body);
      transition: all .2s;
      box-shadow: var(--shadow);
    }

    .tag-item:hover {
      border-color: var(--primary);
      color: var(--primary);
      transform: translateY(-2px);
      box-shadow: var(--shadow-hover);
    }

    .tag-item.hot {
      background: rgba(249, 115, 22, .1);
      border-color: rgba(249, 115, 22, .3);
      color: #c2410c;
    }

    /* Card grid */
    .card-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }

    @media (max-width: 900px) {
      .card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 600px) {
      .card-grid {
        grid-template-columns: 1fr;
      }
    }

    .feature-card {
      background: var(--card);
      border-radius: var(--radius);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      padding: 28px;
      transition: all .2s ease;
      display: flex;
      flex-direction: column;
    }

    .feature-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-3px);
      border-color: rgba(37, 99, 235, .35);
    }

    .feature-card.active-card {
      border-color: var(--primary);
      box-shadow: 0 12px 30px rgba(37, 99, 235, .12);
    }

    .feature-card .icon-wrap {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(37, 99, 235, .1);
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 18px;
    }

    .feature-card .icon-wrap svg {
      width: 24px;
      height: 24px;
      color: var(--primary);
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--heading);
      margin-bottom: 10px;
    }

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

    /* Image cards */
    .pic-card-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }

    @media (max-width: 1024px) {
      .pic-card-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 560px) {
      .pic-card-grid {
        grid-template-columns: 1fr;
      }
    }

    .pic-card {
      background: #fff;
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      transition: all .2s ease;
    }

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

    .pic-card .cover {
      height: 170px;
      overflow: hidden;
      position: relative;
    }

    .pic-card .cover img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform .4s ease;
    }

    .pic-card:hover .cover img {
      transform: scale(1.04);
    }

    .pic-card .cover .badge-lock {
      position: absolute;
      top: 12px;
      left: 12px;
      background: rgba(15, 23, 42, .65);
      color: #fff;
      font-size: 12px;
      font-weight: 600;
      padding: 3px 10px;
      border-radius: 999px;
      display: flex;
      align-items: center;
      gap: 4px;
      backdrop-filter: blur(4px);
    }

    .pic-card .body {
      padding: 18px;
    }

    .pic-card .body h3 {
      font-size: 15px;
      font-weight: 700;
      color: var(--heading);
      margin-bottom: 6px;
    }

    .pic-card .body p {
      font-size: 13px;
      color: var(--muted);
      line-height: 1.6;
      margin-bottom: 12px;
    }

    .pic-card .meta {
      display: flex;
      align-items: center;
      justify-content: space-between;
      font-size: 12px;
      color: var(--muted);
    }

    .pic-card .meta .badge {
      background: rgba(37, 99, 235, .1);
      color: var(--primary);
      padding: 2px 10px;
      border-radius: 6px;
      font-weight: 600;
    }

    /* Stats */
    .stats-section {
      background: var(--night);
      padding: 56px 0;
      position: relative;
      overflow: hidden;
    }

    .stats-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-2.webp') center / cover no-repeat;
      opacity: .08;
    }

    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 32px;
      position: relative;
      z-index: 1;
    }

    @media (max-width: 768px) {
      .stats-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    .stat-item {
      text-align: center;
      color: #fff;
    }

    .stat-item .num {
      font-size: 38px;
      font-weight: 800;
      line-height: 1.1;
      color: #fff;
    }

    .stat-item .num span {
      color: var(--accent);
    }

    .stat-item .lbl {
      font-size: 14px;
      color: rgba(255, 255, 255, .7);
      margin-top: 6px;
    }

    /* Steps */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      counter-reset: step;
    }

    @media (max-width: 900px) {
      .steps-grid {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (max-width: 560px) {
      .steps-grid {
        grid-template-columns: 1fr;
      }
    }

    .step-card {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 24px;
      position: relative;
      box-shadow: var(--shadow);
      transition: all .2s;
    }

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

    .step-card .step-num {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: var(--primary);
      color: #fff;
      font-size: 16px;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 16px;
    }

    .step-card h3 {
      font-size: 16px;
      font-weight: 700;
      color: var(--heading);
      margin-bottom: 8px;
    }

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

    /* Comparison table */
    .table-wrap {
      background: #fff;
      border-radius: 16px;
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
      overflow: hidden;
    }

    .table-wrap table {
      width: 100%;
      border-collapse: collapse;
    }

    .table-wrap th,
    .table-wrap td {
      padding: 14px 18px;
      text-align: left;
      border-bottom: 1px solid var(--border);
      font-size: 14px;
    }

    .table-wrap th {
      background: var(--paper);
      font-weight: 600;
      color: var(--heading);
    }

    .table-wrap tr:last-child td {
      border-bottom: none;
    }

    .table-wrap tr:hover td {
      background: #F8FAFC;
    }

    .table-wrap .check {
      color: #16A34A;
      font-weight: 700;
    }

    .table-wrap .cross {
      color: #94A3B8;
    }

    /* FAQ */
    .faq-wrap {
      max-width: 800px;
      margin: 0 auto;
    }

    .faq-item {
      background: #fff;
      border: 1px solid var(--border);
      border-radius: 12px;
      margin-bottom: 14px;
      overflow: hidden;
      transition: box-shadow .2s;
    }

    .faq-item.open {
      box-shadow: 0 8px 24px rgba(15, 23, 42, .08);
      border-color: rgba(37, 99, 235, .3);
    }

    .faq-question {
      padding: 18px 22px;
      font-size: 16px;
      font-weight: 600;
      color: var(--heading);
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      user-select: none;
    }

    .faq-question .icon {
      width: 24px;
      height: 24px;
      border-radius: 50%;
      border: 1.5px solid var(--border);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      color: var(--primary);
      transition: transform .25s ease;
      flex-shrink: 0;
    }

    .faq-item.open .faq-question .icon {
      transform: rotate(45deg);
      background: var(--primary);
      color: #fff;
      border-color: var(--primary);
    }

    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height .28s ease;
    }

    .faq-item.open .faq-answer {
      max-height: 300px;
    }

    .faq-answer-inner {
      padding: 0 22px 20px;
      font-size: 14px;
      color: var(--muted);
      line-height: 1.75;
    }

    /* CTA */
    .cta-section {
      background: linear-gradient(135deg, #2563EB 0%, #1E3A5F 100%);
      padding: 72px 0;
      position: relative;
      overflow: hidden;
    }

    .cta-section::before {
      content: '';
      position: absolute;
      inset: 0;
      background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
      opacity: .06;
    }

    .cta-inner {
      position: relative;
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
      color: #fff;
    }

    .cta-inner h2 {
      font-size: 34px;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 14px;
    }

    @media (max-width: 768px) {
      .cta-inner h2 {
        font-size: 26px;
      }
    }

    .cta-inner p {
      font-size: 16px;
      color: rgba(255, 255, 255, .85);
      margin-bottom: 12px;
    }

    .cta-price-row {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin: 24px 0 28px;
      flex-wrap: wrap;
    }

    .price-pill {
      background: rgba(255, 255, 255, .15);
      backdrop-filter: blur(4px);
      border: 1px solid rgba(255, 255, 255, .25);
      border-radius: 999px;
      padding: 8px 20px;
      font-size: 14px;
      font-weight: 600;
    }

    .price-pill .amt {
      color: #FCD34D;
      font-weight: 800;
    }

    /* Footer */
    .footer {
      background: #0F172A;
      color: rgba(255, 255, 255, .8);
      padding: 60px 0 30px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
      gap: 40px;
      margin-bottom: 40px;
    }

    @media (max-width: 900px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
    }

    @media (max-width: 560px) {
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }

    .footer-logo {
      font-size: 20px;
      font-weight: 800;
      color: #fff;
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 14px;
    }

    .footer-logo .hl {
      color: #60A5FA;
    }

    .footer-desc {
      font-size: 14px;
      line-height: 1.75;
      color: rgba(255, 255, 255, .6);
      max-width: 320px;
    }

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

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }

    .footer-links a {
      font-size: 14px;
      color: rgba(255, 255, 255, .65);
      transition: color .2s;
    }

    .footer-links a:hover {
      color: #60A5FA;
    }

    .footer-social {
      display: flex;
      gap: 12px;
      margin-top: 12px;
    }

    .footer-social a {
      width: 38px;
      height: 38px;
      border-radius: 10px;
      background: rgba(255, 255, 255, .08);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: all .2s;
      color: rgba(255, 255, 255, .8);
    }

    .footer-social a:hover {
      background: var(--primary);
      color: #fff;
      transform: translateY(-2px);
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, .1);
      padding-top: 24px;
      text-align: center;
      font-size: 13px;
      color: rgba(255, 255, 255, .45);
    }

    /* Fade-in animation */
    .fade-up {
      opacity: 0;
      transform: translateY(20px);
      transition: opacity .6s ease, transform .6s ease;
    }

    .fade-up.visible {
      opacity: 1;
      transform: translateY(0);
    }

    /* Focus states */
    a:focus-visible,
    button:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
      border-radius: 6px;
    }

/* roulang page: article */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --primary-light: #DBEAFE;
            --accent: #F97316;
            --accent-light: #FFEDD5;
            --sky: #0EA5E9;
            --bg: #F8FAFC;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 2px rgb(15 23 42 / 0.06);
            --shadow-md: 0 4px 12px rgb(15 23 42 / 0.08);
            --shadow-lg: 0 8px 24px rgb(15 23 42 / 0.10);
            --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
        }
        * {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-family);
            background: var(--bg);
            color: var(--text-body);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 24px;
            padding-right: 24px;
        }
        @media (max-width: 768px) {
            .container {
                padding-left: 16px;
                padding-right: 16px;
            }
        }

        /* header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 50;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
            transition: box-shadow 0.2s;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 20px rgba(15, 23, 42, 0.06);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 68px;
            gap: 16px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--sky));
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            box-shadow: 0 4px 10px rgba(37, 99, 235, 0.25);
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: 0.5px;
        }
        .logo-text .hl {
            color: var(--primary);
        }
        .logo-sub {
            display: block;
            font-size: 11px;
            font-weight: 500;
            color: var(--text-muted);
            letter-spacing: 1px;
            line-height: 1.2;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 24px;
        }
        .nav-link {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            padding: 6px 2px;
            position: relative;
            transition: color 0.2s;
            white-space: nowrap;
        }
        .nav-link::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: 0;
            width: 100%;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
            transform: scaleX(0);
            transform-origin: left;
            transition: transform 0.25s ease;
        }
        .nav-link:hover {
            color: var(--primary);
        }
        .nav-link:hover::after,
        .nav-link.active::after {
            transform: scaleX(1);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 9px 20px;
            transition: all 0.2s ease;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: var(--primary-dark);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.35), 0 4px 14px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--text);
            cursor: pointer;
            padding: 8px;
            border-radius: 8px;
            transition: background 0.2s;
        }
        .menu-toggle:hover {
            background: var(--bg);
        }
        .menu-toggle:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
        }

        /* article hero */
        .article-hero {
            position: relative;
            overflow: hidden;
            background: linear-gradient(165deg, #F0F6FF 0%, #F8FAFC 60%, #FFFFFF 100%);
            border-bottom: 1px solid var(--border);
        }
        .article-hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.12;
        }
        .article-hero-bg-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(37, 99, 235, 0.08), transparent 60%);
        }
        .article-hero .container {
            position: relative;
            z-index: 2;
            padding-top: 56px;
            padding-bottom: 56px;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }
        .breadcrumb a {
            color: var(--text-muted);
            transition: color 0.2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: var(--border);
        }
        .breadcrumb .current {
            color: var(--text-body);
            font-weight: 500;
            max-width: 240px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .article-hero h1 {
            font-size: 34px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
            max-width: 780px;
            margin-bottom: 18px;
        }
        @media (max-width: 768px) {
            .article-hero h1 {
                font-size: 26px;
            }
        }
        .article-hero .hero-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 18px;
            font-size: 14px;
            color: var(--text-muted);
        }
        .hero-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .hero-meta .meta-item svg {
            width: 16px;
            height: 16px;
            color: var(--primary);
        }
        .badge {
            display: inline-flex;
            align-items: center;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 999px;
            line-height: 1.6;
        }

        /* article main */
        .article-main {
            padding-top: 48px;
            padding-bottom: 64px;
        }
        .article-body-wrap {
            background: #FFFFFF;
            border: 1px solid var(--border);
            border-radius: 16px;
            box-shadow: var(--shadow-sm);
            padding: 44px 48px;
        }
        @media (max-width: 768px) {
            .article-body-wrap {
                padding: 24px 20px;
            }
        }
        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text-body);
            word-break: break-word;
        }
        .article-content p {
            margin: 18px 0;
        }
        .article-content h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin: 36px 0 14px;
            padding-left: 14px;
            border-left: 4px solid var(--primary);
            border-radius: 2px;
        }
        .article-content h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin: 28px 0 10px;
        }
        .article-content img {
            border-radius: var(--radius);
            margin: 24px auto;
            box-shadow: var(--shadow-sm);
        }
        .article-content ul,
        .article-content ol {
            list-style-position: inside;
            margin: 16px 0;
            padding-left: 12px;
        }
        .article-content ul {
            list-style: none;
            padding-left: 0;
        }
        .article-content ul li {
            position: relative;
            padding-left: 22px;
            margin: 10px 0;
        }
        .article-content ul li::before {
            content: "";
            position: absolute;
            left: 4px;
            top: 11px;
            width: 6px;
            height: 6px;
            border-radius: 50%;
            background: var(--primary);
        }
        .article-content ol {
            list-style: decimal;
        }
        .article-content ol li {
            margin: 10px 0;
            padding-left: 4px;
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: var(--accent-light);
            padding: 16px 22px;
            border-radius: 0 10px 10px 0;
            margin: 24px 0;
            color: #9A3412;
            font-size: 15px;
            line-height: 1.7;
        }
        .article-content a {
            color: var(--primary);
            text-decoration: underline;
            text-underline-offset: 3px;
        }
        .article-content a:hover {
            text-decoration: none;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 14px;
        }
        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 10px 14px;
            text-align: left;
        }
        .article-content table th {
            background: var(--bg);
            font-weight: 600;
        }
        .article-notfound {
            text-align: center;
            padding: 60px 24px;
        }
        .article-notfound .nf-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.08);
            display: flex;
            align-items: center;
            justify-content: center;
        }
        .article-notfound h2 {
            font-size: 22px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 8px;
        }
        .article-notfound p {
            color: var(--text-muted);
            margin-bottom: 28px;
        }

        /* related */
        .related-section {
            background: var(--bg);
            padding: 56px 0 64px;
        }
        .section-head {
            text-align: center;
            margin-bottom: 40px;
        }
        .section-tag {
            display: inline-block;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 12px;
        }
        .section-title {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            line-height: 1.3;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        @media (max-width: 1024px) {
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 640px) {
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        .related-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            display: block;
            transition: all 0.25s ease;
            box-shadow: var(--shadow-sm);
        }
        .related-card:hover {
            box-shadow: var(--shadow-lg);
            transform: translateY(-4px);
            border-color: rgba(37, 99, 235, 0.2);
        }
        .related-card .related-img {
            position: relative;
            overflow: hidden;
        }
        .related-card .related-img img {
            width: 100%;
            height: 176px;
            object-fit: cover;
            transition: transform 0.35s ease;
        }
        .related-card:hover .related-img img {
            transform: scale(1.04);
        }
        .related-card .related-img .badge {
            position: absolute;
            top: 12px;
            left: 12px;
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(4px);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
        }
        .related-body {
            padding: 20px 20px 22px;
        }
        .related-body h3 {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color 0.2s;
        }
        .related-body p {
            font-size: 13px;
            color: var(--text-muted);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-body .read-more {
            font-size: 13px;
            font-weight: 600;
            color: var(--primary);
            display: inline-flex;
            align-items: center;
            gap: 4px;
            transition: gap 0.2s;
        }
        .related-body .read-more:hover {
            gap: 8px;
        }

        /* back section */
        .back-section {
            padding: 40px 0 56px;
            text-align: center;
            background: #fff;
            border-top: 1px solid var(--border);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            border: 1px solid var(--primary);
            border-radius: var(--radius-sm);
            padding: 10px 28px;
            transition: all 0.2s ease;
            cursor: pointer;
        }
        .btn-secondary:hover {
            background: rgba(37, 99, 235, 0.06);
            border-color: var(--primary-dark);
            transform: translateY(-1px);
        }
        .btn-secondary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.3);
        }
        .btn-secondary:active {
            transform: scale(0.97);
        }

        /* footer */
        .footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.7);
            padding-top: 64px;
            padding-bottom: 32px;
            font-size: 14px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
            gap: 48px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 40px;
            }
        }
        @media (max-width: 640px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            letter-spacing: 0.5px;
            margin-bottom: 12px;
        }
        .footer-logo .hl {
            color: var(--sky);
        }
        .footer-desc {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            max-width: 320px;
        }
        .footer-social {
            display: flex;
            gap: 12px;
            margin-top: 20px;
        }
        .footer-social a {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            transition: all 0.2s;
        }
        .footer-social a:hover {
            background: rgba(255, 255, 255, 0.2);
            color: #fff;
            transform: translateY(-2px);
        }
        .footer-title {
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            transition: color 0.2s;
        }
        .footer-links a:hover {
            color: var(--sky);
        }
        .footer-contact p {
            color: rgba(255, 255, 255, 0.6);
            line-height: 1.8;
            margin-bottom: 4px;
        }
        .footer-bottom {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            padding-top: 28px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.35);
        }
        @media (max-width: 640px) {
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }

        /* mobile */
        @media (max-width: 1080px) {
            .nav-links {
                gap: 16px;
            }
        }
        @media (max-width: 960px) {
            .menu-toggle {
                display: flex;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                padding: 20px 24px;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                box-shadow: 0 12px 30px rgba(15, 23, 42, 0.12);
                border-bottom: 1px solid var(--border);
            }
            .site-header.mobile-open .nav-links {
                display: flex;
            }
            .nav-links .nav-link {
                font-size: 16px;
                padding: 12px 0;
                width: 100%;
                border-bottom: 1px solid var(--bg);
            }
            .nav-links .nav-link::after {
                display: none;
            }
            .nav-links .btn-primary {
                margin-top: 14px;
                width: 100%;
                justify-content: center;
            }
        }

/* roulang page: category2 */
:root {
    --primary: #2563EB;
    --primary-dark: #1E40AF;
    --primary-light: #DBEAFE;
    --deep-blue: #1E3A5F;
    --accent: #F97316;
    --accent-light: #FFEDD5;
    --sky: #0EA5E9;
    --bg: #F8FAFC;
    --bg-deep: #0F172A;
    --card: #FFFFFF;
    --text: #0F172A;
    --text-body: #334155;
    --text-muted: #64748B;
    --border: #E2E8F0;
    --radius: 1rem;
    --radius-sm: 0.625rem;
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, .06);
    --shadow-md: 0 8px 24px rgba(15, 23, 42, .08);
    --shadow-lg: 0 16px 40px rgba(15, 23, 42, .12);
    --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  }

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

  html {
    scroll-behavior: smooth;
  }

  body {
    margin: 0;
    font-family: var(--font-family);
    background: var(--bg);
    color: var(--text-body);
    line-height: 1.75;
    -webkit-font-smoothing: antialiased;
  }

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

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

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

  .container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding-left: 16px;
    padding-right: 16px;
  }

  /* ── Header & Nav ── */
  .site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    height: 64px;
    background: rgba(255, 255, 255, .88);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid rgba(226, 232, 240, .8);
  }

  .header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    gap: 16px;
  }

  .logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), var(--sky));
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
  }

  .logo-text {
    font-weight: 800;
    font-size: 18px;
    color: var(--text);
    letter-spacing: .5px;
    line-height: 1.2;
  }

  .logo-sub {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-muted);
    margin-left: 4px;
    letter-spacing: 1px;
  }

  .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
  }

  .nav-link {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    border-radius: 8px;
    transition: color .2s, background .2s;
    position: relative;
  }

  .nav-link:hover {
    color: var(--primary);
    background: rgba(37, 99, 235, .06);
  }

  .nav-link.active {
    color: var(--primary);
    background: rgba(37, 99, 235, .09);
    font-weight: 600;
  }

  .nav-link.active::after {
    content: '';
    position: absolute;
    left: 14px;
    right: 14px;
    bottom: 4px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
  }

  .btn-primary,
  .btn-outline,
  .btn-white,
  .btn-ghost {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    transition: all .2s ease;
    border: none;
    cursor: pointer;
    line-height: 1.4;
  }

  .btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 14px rgba(37, 99, 235, .28);
  }

  .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 8px 20px rgba(37, 99, 235, .3);
  }

  .btn-primary:active,
  .btn-outline:active,
  .btn-white:active,
  .btn-ghost:active {
    transform: scale(.97);
  }

  .btn-primary:focus-visible,
  .btn-outline:focus-visible,
  .btn-white:focus-visible,
  .btn-ghost:focus-visible {
    outline: none;
    box-shadow: 0 0 0 4px rgba(37, 99, 235, .25);
  }

  .btn-outline {
    background: #fff;
    color: var(--primary);
    border: 1.5px solid var(--primary);
  }

  .btn-outline:hover {
    background: var(--primary-light);
    border-color: var(--primary-dark);
    transform: translateY(-1px);
  }

  .btn-white {
    background: #fff;
    color: var(--primary);
    padding: 14px 32px;
    font-size: 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, .15);
  }

  .btn-white:hover {
    background: #f1f5f9;
    transform: translateY(-2px);
  }

  .btn-ghost {
    background: transparent;
    color: #fff;
    border: 1.5px solid rgba(255, 255, 255, .65);
    padding: 14px 32px;
    font-size: 16px;
  }

  .btn-ghost:hover {
    background: rgba(255, 255, 255, .12);
    border-color: #fff;
  }

  .btn-block {
    width: 100%;
    padding: 12px 20px;
  }

  .menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    align-items: center;
    justify-content: center;
    color: var(--text);
  }

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

  /* ── Hero ── */
  .hero {
    position: relative;
    padding: 72px 0 84px;
    background: linear-gradient(135deg, #EFF6FF 0%, #F8FAFC 55%, #FFFFFF 100%);
    overflow: hidden;
  }

  .hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-1.png');
    background-size: cover;
    background-position: center;
    opacity: .10;
  }

  .hero::after {
    content: '';
    position: absolute;
    width: 480px;
    height: 480px;
    border-radius: 50%;
    background: radial-gradient(closest-side, rgba(37, 99, 235, .10), transparent 70%);
    top: -120px;
    right: -100px;
    pointer-events: none;
  }

  .hero-inner {
    position: relative;
    z-index: 1;
    display: grid;
    grid-template-columns: 55fr 45fr;
    gap: 56px;
    align-items: center;
  }

  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 18px;
    flex-wrap: wrap;
  }

  .breadcrumb a {
    color: var(--primary);
    font-weight: 500;
  }

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

  .breadcrumb .sep {
    color: #94a3b8;
  }

  .badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: rgba(37, 99, 235, .08);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 14px;
    border-radius: 999px;
    border: 1px solid rgba(37, 99, 235, .16);
  }

  .hero-title {
    font-size: 36px;
    line-height: 1.25;
    font-weight: 800;
    color: var(--text);
    margin: 18px 0 16px;
    letter-spacing: .5px;
  }

  .hero-title .highlight {
    color: var(--primary);
    position: relative;
  }

  .hero-title .highlight::after {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 4px;
    height: 8px;
    background: rgba(37, 99, 235, .14);
    border-radius: 4px;
    z-index: -1;
  }

  .hero-desc {
    font-size: 16px;
    line-height: 1.75;
    color: var(--text-body);
    max-width: 520px;
    margin-bottom: 28px;
  }

  .hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-bottom: 28px;
  }

  .hero-points {
    display: flex;
    flex-wrap: wrap;
    gap: 18px;
    font-size: 14px;
    color: var(--text-muted);
  }

  .hero-points span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }

  .hero-points i {
    font-style: normal;
    color: var(--primary);
    font-weight: 700;
  }

  .hero-visual {
    position: relative;
  }

  .hero-visual img {
    width: 100%;
    border-radius: 20px;
    box-shadow: 0 20px 50px rgba(15, 23, 42, .14);
    border: 4px solid #fff;
  }

  .hero-float-card {
    position: absolute;
    left: -20px;
    bottom: 28px;
    background: #fff;
    border-radius: 14px;
    padding: 14px 18px;
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    gap: 2px;
    border: 1px solid var(--border);
    min-width: 160px;
  }

  .hero-float-card .float-title {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
  }

  .hero-float-card .float-value {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary);
  }

  .hero-float-card .float-desc {
    font-size: 12px;
    color: var(--text-muted);
  }

  /* ── Section shared ── */
  .section {
    padding: 80px 0;
  }

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

  .section-head {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 48px;
  }

  .section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-light);
    padding: 5px 14px;
    border-radius: 999px;
    margin-bottom: 12px;
    letter-spacing: 1px;
  }

  .section-head h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--text);
    line-height: 1.3;
    margin: 0 0 12px;
  }

  .section-head p {
    font-size: 16px;
    color: var(--text-muted);
    margin: 0;
  }

  /* ── Compare / Plan Card ── */
  .compare-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    align-items: stretch;
  }

  .plan-card {
    background: var(--card);
    border-radius: 18px;
    border: 1px solid var(--border);
    padding: 32px 28px;
    box-shadow: var(--shadow-sm);
    transition: transform .25s, box-shadow .25s;
    position: relative;
    display: flex;
    flex-direction: column;
  }

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

  .plan-card.featured {
    border: 2px solid var(--primary);
    box-shadow: 0 12px 36px rgba(37, 99, 235, .14);
    padding-top: 40px;
  }

  .plan-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--accent);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    padding: 5px 16px;
    border-radius: 999px;
    letter-spacing: .5px;
    box-shadow: 0 4px 10px rgba(249, 115, 22, .35);
    white-space: nowrap;
  }

  .plan-head {
    text-align: center;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
  }

  .plan-name {
    display: block;
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 8px;
  }

  .plan-price {
    display: block;
    font-size: 38px;
    font-weight: 800;
    color: var(--text);
    line-height: 1.2;
  }

  .plan-price .plan-period {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: 2px;
  }

  .plan-list {
    list-style: none;
    margin: 0;
    padding: 0;
    flex: 1;
    margin-bottom: 24px;
  }

  .plan-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--text-body);
    padding: 7px 0;
    line-height: 1.5;
  }

  .plan-list li i {
    font-style: normal;
    font-weight: 700;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    flex-shrink: 0;
    margin-top: 2px;
  }

  .plan-list li i.yes {
    background: #ECFDF5;
    color: #10B981;
  }

  .plan-list li i.no {
    background: #FEF2F2;
    color: #EF4444;
  }

  /* ── Scenario ── */
  .scenario-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .scenario-card {
    background: var(--card);
    border-radius: 18px;
    border: 1px solid var(--border);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform .25s, box-shadow .25s;
  }

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

  .scenario-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
  }

  .scenario-card .scenario-content {
    padding: 24px;
  }

  .scenario-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 8px;
  }

  .scenario-card p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0 0 16px;
    line-height: 1.65;
  }

  .scenario-card a {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: color .2s, gap .2s;
  }

  .scenario-card a:hover {
    color: var(--primary-dark);
    gap: 8px;
  }

  .scenario-card.wide {
    grid-column: span 2;
    display: grid;
    grid-template-columns: 1fr 1fr;
  }

  .scenario-card.wide img {
    height: 100%;
    min-height: 220px;
  }

  .scenario-card.wide .scenario-content {
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 32px;
  }

  /* ── Steps ── */
  .steps-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
  }

  .step-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 32px 24px;
    text-align: center;
    box-shadow: var(--shadow-sm);
    transition: transform .25s, box-shadow .25s;
    position: relative;
  }

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

  .step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 52px;
    height: 52px;
    border-radius: 16px;
    background: linear-gradient(135deg, var(--primary), var(--sky));
    color: #fff;
    font-size: 20px;
    font-weight: 800;
    margin-bottom: 18px;
    box-shadow: 0 8px 18px rgba(37, 99, 235, .25);
  }

  .step-item h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    margin: 0 0 8px;
  }

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

  /* ── Notice list ── */
  .notice-wrap {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 40px;
  }

  .notice-card {
    display: flex;
    gap: 16px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    padding: 16px;
    transition: box-shadow .2s, transform .2s;
  }

  .notice-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
  }

  .notice-card img {
    width: 120px;
    height: 90px;
    object-fit: cover;
    border-radius: 10px;
    flex-shrink: 0;
  }

  .notice-info {
    flex: 1;
    min-width: 0;
  }

  .notice-info .tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(37, 99, 235, .08);
    padding: 3px 10px;
    border-radius: 6px;
    margin-bottom: 6px;
  }

  .notice-info h3 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin: 0 0 6px;
    line-height: 1.4;
    transition: color .2s;
  }

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

  .notice-info p {
    font-size: 14px;
    color: var(--text-muted);
    margin: 0 0 8px;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .notice-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    font-size: 12px;
    color: #94a3b8;
  }

  .notice-meta a {
    color: var(--primary);
    font-weight: 600;
    white-space: nowrap;
  }

  .pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    flex-wrap: wrap;
  }

  .page-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    padding: 0 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: #fff;
    color: var(--text-body);
    font-size: 14px;
    font-weight: 500;
    transition: all .2s;
  }

  .page-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(37, 99, 235, .04);
  }

  .page-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, .25);
  }

  /* ── Feature row ── */
  .feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 56px;
    align-items: center;
    padding: 32px 0;
  }

  .feature-row.reverse .feature-media {
    order: 2;
  }

  .feature-media img {
    width: 100%;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border);
  }

  .feature-text h3 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text);
    margin: 0 0 14px;
  }

  .feature-text p {
    font-size: 15px;
    color: var(--text-body);
    margin: 0 0 20px;
    line-height: 1.75;
  }

  .feature-text ul {
    list-style: none;
    margin: 0;
    padding: 0;
  }

  .feature-text ul li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-body);
    padding: 5px 0;
  }

  .feature-text ul li::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    flex-shrink: 0;
  }

  /* ── FAQ ── */
  .faq-list {
    max-width: 840px;
    margin: 0 auto;
  }

  .faq-item {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 14px;
    margin-bottom: 14px;
    overflow: hidden;
    transition: box-shadow .2s;
  }

  .faq-item.open {
    box-shadow: var(--shadow-sm);
    border-color: rgba(37, 99, 235, .25);
  }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    background: transparent;
    border: none;
    padding: 20px 22px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    text-align: left;
    transition: color .2s;
  }

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

  .faq-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(37, 99, 235, .08);
    color: var(--primary);
    font-size: 20px;
    font-weight: 600;
    transition: transform .25s, background .25s;
    flex-shrink: 0;
  }

  .faq-item.open .faq-icon {
    transform: rotate(135deg);
    background: var(--primary);
    color: #fff;
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height .3s ease, padding .3s ease;
    padding: 0 22px;
    background: var(--bg);
  }

  .faq-item.open .faq-answer {
    max-height: 300px;
    padding: 4px 22px 18px;
  }

  .faq-answer p {
    font-size: 14px;
    color: var(--text-body);
    margin: 0;
    line-height: 1.7;
  }

  /* ── CTA ── */
  .cta-section {
    background: linear-gradient(135deg, var(--primary) 0%, var(--deep-blue) 100%);
    padding: 84px 0;
    position: relative;
    overflow: hidden;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background-image: url('/assets/images/backpic/back-2.webp');
    background-size: cover;
    background-position: center;
    opacity: .08;
  }

  .cta-inner {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 720px;
    margin: 0 auto;
  }

  .cta-inner h2 {
    font-size: 32px;
    font-weight: 800;
    color: #fff;
    margin: 0 0 14px;
    line-height: 1.3;
  }

  .cta-inner > p {
    font-size: 16px;
    color: rgba(255, 255, 255, .82);
    margin: 0 0 32px;
    line-height: 1.7;
  }

  .cta-pricing {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 36px;
  }

  .cta-price {
    background: rgba(255, 255, 255, .14);
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 14px;
    padding: 14px 26px;
    color: #fff;
    font-size: 26px;
    font-weight: 800;
    line-height: 1.2;
    backdrop-filter: blur(6px);
    min-width: 110px;
  }

  .cta-price span {
    display: block;
    font-size: 13px;
    font-weight: 400;
    color: rgba(255, 255, 255, .75);
    margin-top: 2px;
  }

  .cta-price.highlight {
    background: rgba(255, 255, 255, .96);
    color: var(--primary);
    border-color: #fff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, .18);
  }

  .cta-price.highlight span {
    color: var(--text-muted);
  }

  .cta-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
  }

  /* ── Footer ── */
  .footer {
    background: var(--bg-deep);
    color: rgba(255, 255, 255, .78);
    padding: 64px 0 28px;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 40px;
  }

  .footer-logo {
    font-size: 22px;
    font-weight: 800;
    color: #fff;
    line-height: 1.3;
  }

  .footer-logo .hl {
    color: #60A5FA;
    font-size: 15px;
    font-weight: 500;
    margin-left: 2px;
  }

  .footer-desc {
    font-size: 14px;
    line-height: 1.7;
    margin: 14px 0 0;
    color: rgba(255, 255, 255, .65);
    max-width: 280px;
  }

  .footer-social {
    display: flex;
    gap: 12px;
    margin-top: 20px;
  }

  .footer-social a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 10px;
    background: rgba(255, 255, 255, .08);
    color: rgba(255, 255, 255, .85);
    transition: background .2s, color .2s, transform .2s;
  }

  .footer-social a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-2px);
  }

  .footer h4 {
    font-size: 16px;
    font-weight: 700;
    color: #fff;
    margin: 0 0 16px;
  }

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

  .footer-links li {
    margin-bottom: 10px;
  }

  .footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, .68);
    transition: color .2s, padding-left .2s;
  }

  .footer-links a:hover {
    color: #fff;
    padding-left: 4px;
  }

  .footer-contact {
    list-style: none;
    margin: 0;
    padding: 0;
    font-size: 14px;
    color: rgba(255, 255, 255, .68);
    line-height: 1.8;
  }

  .footer-contact li {
    display: flex;
    align-items: flex-start;
    gap: 8px;
  }

  .footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, .1);
    padding-top: 22px;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, .5);
  }

  .footer-bottom a {
    color: rgba(255, 255, 255, .68);
  }

  /* ── Responsive ── */
  @media (max-width: 1024px) {
    .hero-inner {
      grid-template-columns: 1fr;
      gap: 40px;
    }

    .hero-visual {
      max-width: 560px;
    }

    .menu-toggle {
      display: inline-flex;
    }

    .nav-links {
      position: fixed;
      top: 64px;
      left: 0;
      right: 0;
      background: #fff;
      flex-direction: column;
      align-items: stretch;
      padding: 16px;
      gap: 4px;
      box-shadow: 0 12px 40px rgba(15, 23, 42, .16);
      transform: translateY(-160%);
      transition: transform .3s ease;
      border-bottom: 1px solid var(--border);
      z-index: 49;
    }

    .nav-links.open {
      transform: translateY(0);
    }

    .nav-link {
      padding: 12px 16px;
      font-size: 16px;
    }

    .nav-link.active::after {
      display: none;
    }

    .nav-links .btn-primary {
      margin: 8px 0 0;
      justify-content: center;
    }

    .compare-grid {
      grid-template-columns: 1fr;
      gap: 20px;
      max-width: 480px;
      margin: 0 auto;
    }

    .plan-card.featured {
      order: -1;
    }

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

    .scenario-card.wide {
      grid-column: span 1;
      grid-template-columns: 1fr;
    }

    .scenario-card.wide img {
      height: 200px;
    }

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

    .notice-wrap {
      grid-template-columns: 1fr;
    }

    .feature-row {
      grid-template-columns: 1fr;
      gap: 28px;
      padding: 20px 0;
    }

    .feature-row.reverse .feature-media {
      order: 0;
    }

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

  @media (max-width: 768px) {
    .section {
      padding: 56px 0;
    }

    .hero {
      padding: 48px 0 56px;
    }

    .hero-title {
      font-size: 30px;
    }

    .section-head h2 {
      font-size: 24px;
    }

    .hero-actions .btn-primary,
    .hero-actions .btn-outline {
      width: 100%;
    }

    .hero-points {
      gap: 10px;
      flex-direction: column;
    }

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

    .cta-inner h2 {
      font-size: 26px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }

    .notice-card {
      flex-direction: column;
    }

    .notice-card img {
      width: 100%;
      height: 160px;
    }

    .hero-float-card {
      left: 12px;
      bottom: 16px;
      min-width: 140px;
    }
  }

  @media (max-width: 520px) {
    .container {
      padding-left: 14px;
      padding-right: 14px;
    }

    .logo-text {
      font-size: 16px;
    }

    .hero-title {
      font-size: 26px;
    }

    .plan-card {
      padding: 24px 18px;
    }

    .cta-price {
      font-size: 22px;
      padding: 10px 18px;
      min-width: 90px;
    }

    .btn-white,
    .btn-ghost {
      width: 100%;
      padding: 12px 20px;
    }
  }

/* roulang page: category3 */
:root {
            --primary: #2563EB;
            --primary-dark: #1D4ED8;
            --accent: #F97316;
            --sky: #0EA5E9;
            --bg: #F8FAFC;
            --card: #FFFFFF;
            --text: #0F172A;
            --text-body: #334155;
            --text-muted: #64748B;
            --border: #E2E8F0;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06);
            --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.08);
            --transition: 0.2s ease;
        }
        * {
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            margin: 0;
            background: var(--bg);
            color: var(--text-body);
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        ul,
        ol {
            margin: 0;
            padding: 0;
            list-style: none;
        }
        button,
        input {
            font-family: inherit;
            border: none;
            background: none;
            cursor: pointer;
            outline: none;
        }

        .site-container {
            width: 100%;
            max-width: 1280px;
            margin-left: auto;
            margin-right: auto;
            padding-left: 16px;
            padding-right: 16px;
        }
        @media (min-width: 768px) {
            .site-container {
                padding-left: 24px;
                padding-right: 24px;
            }
        }

        /* Header */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(255, 255, 255, 0.88);
            backdrop-filter: blur(14px);
            -webkit-backdrop-filter: blur(14px);
            border-bottom: 1px solid var(--border);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
        }
        .site-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: linear-gradient(135deg, var(--primary), var(--sky));
            color: #fff;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.25);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.02em;
            white-space: nowrap;
        }
        .logo-sub {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            margin-left: 6px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
        }
        .nav-link {
            display: inline-flex;
            align-items: center;
            padding: 8px 14px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-body);
            border-radius: 8px;
            position: relative;
            transition: color var(--transition), background var(--transition);
        }
        .nav-link:hover {
            color: var(--primary);
            background: rgba(37, 99, 235, 0.06);
        }
        .nav-link.active {
            color: var(--primary);
            font-weight: 600;
        }
        .nav-link.active::after {
            content: "";
            position: absolute;
            left: 14px;
            right: 14px;
            bottom: 2px;
            height: 2px;
            border-radius: 2px;
            background: var(--primary);
        }

        /* Buttons */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: var(--primary);
            color: #fff;
            font-size: 15px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: 8px;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
            white-space: nowrap;
        }
        .btn-primary:hover {
            background: #1D4ED8;
            transform: translateY(-1px);
            box-shadow: 0 8px 20px rgba(37, 99, 235, 0.28);
        }
        .btn-primary:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.3);
        }
        .btn-primary:active {
            transform: scale(0.97);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            padding: 10px 22px;
            border-radius: 8px;
            border: 1px solid #BFDBFE;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .btn-outline:hover {
            background: rgba(37, 99, 235, 0.06);
            border-color: var(--primary);
        }
        .btn-outline:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.2);
        }
        .btn-outline:active {
            transform: scale(0.97);
        }
        .btn-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
            background: #fff;
            color: var(--primary);
            font-size: 16px;
            font-weight: 700;
            padding: 14px 34px;
            border-radius: 10px;
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.15);
            transition: background var(--transition), color var(--transition), transform var(--transition);
            white-space: nowrap;
        }
        .btn-light:hover {
            background: var(--accent);
            color: #fff;
            transform: translateY(-2px);
        }
        .btn-light:focus-visible {
            outline: none;
            box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.5);
        }

        .nav-cta {
            margin-left: 12px;
        }

        /* Mobile menu */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            justify-content: center;
            gap: 5px;
            width: 44px;
            height: 44px;
            padding: 10px;
            border-radius: 8px;
        }
        .mobile-menu-btn span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: transform 0.3s, opacity 0.3s;
        }
        .mobile-menu-btn.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .mobile-menu-btn.active span:nth-child(2) {
            opacity: 0;
        }
        .mobile-menu-btn.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* Hero */
        .hero {
            position: relative;
            padding: 72px 0 80px;
            overflow: hidden;
            background: linear-gradient(180deg, #EFF6FF 0%, var(--bg) 100%);
        }
        .hero::before {
            content: "";
            position: absolute;
            top: -80px;
            right: -80px;
            width: 320px;
            height: 320px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(14, 165, 233, 0.10), transparent 70%);
            pointer-events: none;
        }
        .hero-inner {
            display: grid;
            grid-template-columns: 55% 45%;
            gap: 56px;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            background: rgba(37, 99, 235, 0.1);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 999px;
            margin-bottom: 18px;
            border: 1px solid rgba(37, 99, 235, 0.15);
        }
        .hero h1 {
            font-size: 38px;
            line-height: 1.25;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 16px;
            letter-spacing: -0.02em;
        }
        .hero h1 .hl {
            color: var(--primary);
        }
        .hero-desc {
            font-size: 17px;
            color: var(--text-muted);
            max-width: 520px;
            margin: 0 0 32px;
            line-height: 1.8;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .hero-image {
            position: relative;
        }
        .hero-image img {
            border-radius: 20px;
            box-shadow: 0 24px 60px rgba(15, 23, 42, 0.12);
            border: 1px solid rgba(255, 255, 255, 0.6);
            background: #fff;
        }
        .hero-image .float-tag {
            position: absolute;
            bottom: 20px;
            left: -18px;
            background: #fff;
            border-radius: 12px;
            padding: 10px 18px;
            box-shadow: 0 12px 32px rgba(15, 23, 42, 0.12);
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--text);
        }
        .hero-image .float-tag .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #10B981;
            box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
        }

        /* Section */
        .section {
            padding: 80px 0;
        }
        .section-head {
            max-width: 680px;
            margin-bottom: 48px;
        }
        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }
        .section-title {
            font-size: 30px;
            line-height: 1.3;
            font-weight: 800;
            color: var(--text);
            margin: 0 0 14px;
            letter-spacing: -0.02em;
        }
        .section-desc {
            font-size: 16px;
            color: var(--text-muted);
            margin: 0;
        }

        /* Help cards */
        .help-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .help-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            box-shadow: var(--shadow-sm);
            transition: transform var(--transition), box-shadow var(--transition);
            position: relative;
            overflow: hidden;
        }
        .help-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .help-icon {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 46px;
            height: 46px;
            border-radius: 12px;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            margin-bottom: 18px;
        }
        .help-card h3 {
            font-size: 18px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 8px;
        }
        .help-card p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }
        .help-card .card-link {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            margin-top: 14px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            transition: gap var(--transition);
        }
        .help-card .card-link:hover {
            gap: 8px;
        }

        /* Steps */
        .steps-section {
            background: #fff;
        }
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            counter-reset: step;
        }
        .step-item {
            position: relative;
            padding: 36px 28px 28px;
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            transition: box-shadow var(--transition);
        }
        .step-item:hover {
            box-shadow: var(--shadow-md);
        }
        .step-num {
            font-size: 14px;
            font-weight: 700;
            color: var(--accent);
            text-transform: uppercase;
            letter-spacing: 0.08em;
            margin-bottom: 12px;
            display: block;
        }
        .step-item h3 {
            font-size: 19px;
            font-weight: 700;
            color: var(--text);
            margin: 0 0 10px;
        }
        .step-item p {
            font-size: 14px;
            color: var(--text-muted);
            margin: 0;
            line-height: 1.7;
        }
        .step-icon {
            position: absolute;
            top: 24px;
            right: 24px;
            width: 36px;
            height: 36px;
            border-radius: 50%;
            background: rgba(249, 115, 22, 0.12);
            color: var(--accent);
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* FAQ */
        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }
        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item.active {
            box-shadow: var(--shadow-md);
            border-color: rgba(37, 99, 235, 0.3);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            width: 100%;
            padding: 20px 24px;
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            text-align: left;
            transition: color var(--transition);
        }
        .faq-question:hover {
            color: var(--primary);
        }
        .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(37, 99, 235, 0.08);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.3s ease, background 0.3s ease;
        }
        .faq-item.active .faq-icon {
            transform: rotate(45deg);
            background: var(--primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }
        .faq-item.active .faq-answer {
            max-height: 320px;
        }
        .faq-answer-inner {
            padding: 0 24px 20px;
            font-size: 14px;
            color: var(--text-muted);
            line-height: 1.8;
            border-top: 1px solid var(--bg);
            padding-top: 14px;
        }

        /* CTA */
        .cta-section {
            background: linear-gradient(135deg, var(--primary), #1E3A5F);
            position: relative;
            overflow: hidden;
            padding: 88px 0;
            color: #fff;
        }
        .cta-section::before {
            content: "";
            position: absolute;
            top: -100px;
            right: -100px;
            width: 400px;
            height: 400px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.08);
        }
        .cta-section::after {
            content: "";
            position: absolute;
            bottom: -120px;
            left: -60px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(14, 165, 233, 0.15);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            font-size: 32px;
            line-height: 1.3;
            font-weight: 800;
            margin: 0 0 16px;
        }
        .cta-inner p {
            font-size: 16px;
            opacity: 0.9;
            margin: 0 0 36px;
            line-height: 1.8;
        }
        .cta-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }

        /* Footer */
        .footer {
            background: #0F172A;
            color: rgba(255, 255, 255, 0.75);
            padding-top: 72px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }
        .footer-logo {
            font-size: 22px;
            font-weight: 800;
            color: #fff;
            margin-bottom: 14px;
        }
        .footer-logo .hl {
            color: var(--sky);
            font-weight: 500;
            font-size: 16px;
            margin-left: 4px;
        }
        .footer-desc {
            font-size: 14px;
            line-height: 1.8;
            margin: 0;
            max-width: 300px;
        }
        .footer h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin: 0 0 16px;
        }
        .footer ul li {
            margin-bottom: 10px;
        }
        .footer ul a {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            transition: color var(--transition);
        }
        .footer ul a:hover {
            color: #fff;
        }
        .footer-contact p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 8px;
            line-height: 1.7;
        }
        .footer-social {
            display: flex;
            gap: 10px;
            margin-top: 14px;
        }
        .footer-social a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.08);
            color: rgba(255, 255, 255, 0.7);
            transition: background var(--transition), color var(--transition);
        }
        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
        }
        .footer-bottom {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            padding: 24px 0;
            text-align: center;
        }
        .footer-bottom p {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
            margin: 0;
        }
        .footer-bottom a {
            color: rgba(255, 255, 255, 0.4);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .help-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-inner {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            .hero-image {
                max-width: 560px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .nav-links {
                position: fixed;
                top: 64px;
                right: 0;
                bottom: 0;
                width: min(320px, 80vw);
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                gap: 4px;
                padding: 24px 20px;
                box-shadow: -8px 0 30px rgba(15, 23, 42, 0.1);
                transform: translateX(105%);
                transition: transform 0.3s ease;
                border-top: 1px solid var(--border);
                z-index: 99;
            }
            .nav-links.open {
                transform: translateX(0);
            }
            .nav-link {
                width: 100%;
                padding: 12px 14px;
                font-size: 16px;
            }
            .nav-link.active::after {
                left: 14px;
                right: auto;
                bottom: 8px;
                width: 20px;
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 12px;
                width: 100%;
            }
            .mobile-menu-btn {
                display: flex;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
        }
        @media (max-width: 640px) {
            .hero {
                padding: 48px 0 56px;
            }
            .hero h1 {
                font-size: 28px;
            }
            .hero-desc {
                font-size: 15px;
            }
            .section {
                padding: 56px 0;
            }
            .section-title {
                font-size: 26px;
            }
            .help-grid {
                grid-template-columns: 1fr;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .cta-section {
                padding: 64px 0;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .hero-actions {
                flex-direction: column;
                width: 100%;
            }
            .hero-actions .btn-primary,
            .hero-actions .btn-outline {
                width: 100%;
            }
            .logo-sub {
                display: none;
            }
        }
        @media (max-width: 520px) {
            .logo-text {
                font-size: 18px;
            }
            .logo-icon {
                width: 32px;
                height: 32px;
            }
        }