/* roulang page: index */
:root {
      --primary: #0f4c81;
      --primary-hover: #0b3860;
      --secondary: #2b7bb9;
      --accent: #e65100;
      --accent-hover: #c64300;
      --bg-page: #f4f7fb;
      --bg-surface: #ffffff;
      --bg-alt: #e9f0f8;
      --text-main: #1e293b;
      --text-muted: #64748b;
      --border-color: #dbe4ee;
      --radius-sm: 6px;
      --radius-md: 12px;
      --radius-lg: 18px;
      --shadow-sm: 0 2px 6px rgba(15, 76, 129, 0.05);
      --shadow-md: 0 8px 24px rgba(15, 76, 129, 0.08);
      --shadow-lg: 0 16px 36px rgba(15, 76, 129, 0.12);
    }
    body {
      background-color: var(--bg-page);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
    }
    a {
      text-decoration: none;
      color: var(--primary);
      transition: color 0.2s ease-in-out;
    }
    a:hover {
      color: var(--primary-hover);
    }
    .site-header {
      background: #ffffff;
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 1020;
      box-shadow: var(--shadow-sm);
    }
    .brand-logo {
      font-size: 1.45rem;
      font-weight: 800;
      color: var(--primary);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .brand-logo i {
      font-size: 1.6rem;
      color: var(--accent);
    }
    .nav-grid-strip {
      display: flex;
      align-items: center;
      gap: 1.5rem;
      overflow-x: auto;
      padding: 0.5rem 0;
    }
    .nav-grid-item {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 12px;
      border-radius: var(--radius-sm);
      color: var(--text-main);
      font-weight: 500;
      font-size: 0.95rem;
      white-space: nowrap;
    }
    .nav-grid-item:hover, .nav-grid-item.active {
      background-color: var(--bg-alt);
      color: var(--primary);
    }
    .hero-banner {
      background: linear-gradient(135deg, #0b2d4f 0%, #0f4c81 60%, #1e6091 100%);
      color: #ffffff;
      padding: 5rem 0 4.5rem;
      position: relative;
      overflow: hidden;
    }
    .hero-badge-burst {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--accent);
      color: #fff;
      font-weight: 700;
      font-size: 0.85rem;
      padding: 4px 14px;
      border-radius: 50px;
      box-shadow: 0 4px 14px rgba(230, 81, 0, 0.4);
      margin-bottom: 1.5rem;
      text-transform: uppercase;
    }
    .hero-title {
      font-size: 2.5rem;
      font-weight: 800;
      line-height: 1.25;
      margin-bottom: 1.25rem;
    }
    .hero-desc {
      font-size: 1.05rem;
      color: #d1e3f8;
      max-width: 650px;
      margin-bottom: 2rem;
      line-height: 1.7;
    }
    .btn-action-primary {
      background-color: var(--accent);
      color: #ffffff;
      font-weight: 700;
      padding: 12px 28px;
      border-radius: var(--radius-sm);
      border: none;
      box-shadow: 0 4px 16px rgba(230, 81, 0, 0.35);
      transition: all 0.25s ease;
    }
    .btn-action-primary:hover {
      background-color: var(--accent-hover);
      color: #ffffff;
      transform: translateY(-2px);
    }
    .btn-action-outline {
      background-color: rgba(255, 255, 255, 0.12);
      color: #ffffff;
      border: 1px solid rgba(255, 255, 255, 0.3);
      font-weight: 600;
      padding: 12px 26px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
    }
    .btn-action-outline:hover {
      background-color: #ffffff;
      color: var(--primary);
    }
    .hero-media-box {
      background: rgba(255, 255, 255, 0.08);
      border: 1px solid rgba(255, 255, 255, 0.16);
      backdrop-filter: blur(8px);
      border-radius: var(--radius-lg);
      padding: 2rem;
      box-shadow: var(--shadow-lg);
    }
    .countdown-pill {
      background: rgba(0, 0, 0, 0.35);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: var(--radius-md);
      padding: 1rem;
      text-align: center;
    }
    .countdown-val {
      font-size: 1.75rem;
      font-weight: 800;
      color: #ffb74d;
      line-height: 1;
    }
    .countdown-lbl {
      font-size: 0.75rem;
      color: #cbd5e1;
      margin-top: 4px;
    }
    .feature-section {
      padding: 4.5rem 0;
    }
    .section-title {
      font-size: 1.85rem;
      font-weight: 800;
      color: var(--primary);
      margin-bottom: 0.75rem;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 680px;
      margin: 0 auto 3rem;
    }
    .biz-card {
      background: var(--bg-surface);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      height: 100%;
      box-shadow: var(--shadow-sm);
      transition: all 0.25s ease;
    }
    .biz-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: var(--secondary);
    }
    .biz-icon-circle {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      background: var(--bg-alt);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 1.25rem;
    }
    .biz-card-title {
      font-size: 1.15rem;
      font-weight: 700;
      margin-bottom: 0.75rem;
      color: var(--text-main);
    }
    .biz-card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .audit-list {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .audit-list-item {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      padding: 12px 0;
      border-bottom: 1px dashed var(--border-color);
    }
    .audit-list-item:last-child {
      border-bottom: none;
    }
    .audit-list-item i {
      color: #10b981;
      font-size: 1.2rem;
      margin-top: 2px;
    }
    .step-badge {
      width: 38px;
      height: 38px;
      background-color: var(--primary);
      color: #ffffff;
      border-radius: 50%;
      font-weight: 700;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-bottom: 1rem;
    }
    .stat-number {
      font-size: 2.2rem;
      font-weight: 800;
      color: var(--primary);
      line-height: 1;
    }
    .stat-caption {
      font-size: 0.88rem;
      color: var(--text-muted);
      margin-top: 6px;
    }
    .site-footer {
      background-color: #0b1f36;
      color: #94a3b8;
      padding: 4rem 0 2rem;
      border-top: 1px solid #1e3a5f;
    }
    .footer-heading {
      color: #ffffff;
      font-size: 1.05rem;
      font-weight: 700;
      margin-bottom: 1.25rem;
    }
    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }
    .footer-links li {
      margin-bottom: 0.65rem;
    }
    .footer-links a {
      color: #94a3b8;
      font-size: 0.9rem;
    }
    .footer-links a:hover {
      color: #ffffff;
    }
    .footer-bottom {
      margin-top: 3rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.85rem;
      text-align: center;
    }
    @media (max-width: 991px) {
      .hero-title {
        font-size: 2rem;
      }
      .hero-media-box {
        margin-top: 2.5rem;
      }
    }