/* roulang page: index */
:root {
      --brand-primary: #0F52BA;
      --brand-primary-hover: #0d449c;
      --brand-accent: #00B4D8;
      --brand-accent-light: #e0f7fc;
      --brand-dark: #0A192F;
      --brand-dark-card: #112240;
      --bg-light: #F8FAFC;
      --bg-white: #FFFFFF;
      --text-main: #1E293B;
      --text-muted: #64748B;
      --border-color: #E2E8F0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 2px 8px rgba(15, 82, 186, 0.04);
      --shadow-md: 0 8px 24px -4px rgba(15, 82, 186, 0.08);
      --shadow-hover: 0 16px 32px -4px rgba(15, 82, 186, 0.14);
    }
    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-white);
      line-height: 1.7;
      overflow-x: hidden;
    }
    a {
      text-decoration: none;
      color: inherit;
    }
    .top-bar-notice {
      background-color: var(--brand-dark);
      color: #94A3B8;
      font-size: 0.8125rem;
      padding: 6px 0;
      border-bottom: 1px solid rgba(255,255,255,0.08);
    }
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1030;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      border-bottom: 1px solid var(--border-color);
      transition: all 0.3s ease;
    }
    .brand-logo-text {
      font-size: 1.35rem;
      font-weight: 700;
      color: var(--brand-primary);
      letter-spacing: -0.5px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .brand-logo-badge {
      font-size: 0.7rem;
      background: var(--brand-accent-light);
      color: var(--brand-primary);
      padding: 2px 6px;
      border-radius: 4px;
      font-weight: 600;
    }
    .btn-brand-primary {
      background-color: var(--brand-primary);
      color: #fff;
      border: none;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
    }
    .btn-brand-primary:hover {
      background-color: var(--brand-primary-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(15, 82, 186, 0.25);
    }
    .btn-brand-accent {
      background-color: var(--brand-accent);
      color: #fff;
      border: none;
      font-weight: 600;
      padding: 10px 24px;
      border-radius: var(--radius-sm);
      transition: all 0.25s ease;
    }
    .btn-brand-accent:hover {
      background-color: #0096b3;
      color: #fff;
      transform: translateY(-2px);
    }
    .btn-burger {
      background: #f1f5f9;
      border: 1px solid var(--border-color);
      color: var(--brand-dark);
      padding: 8px 14px;
      border-radius: var(--radius-sm);
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-weight: 600;
      font-size: 0.9rem;
      transition: all 0.2s ease;
    }
    .btn-burger:hover {
      background: #e2e8f0;
    }
    .offcanvas-custom {
      background-color: #0A192F;
      color: #fff;
      width: 320px;
    }
    .offcanvas-custom .btn-close {
      filter: invert(1);
    }
    .drawer-nav-link {
      color: #CBD5E1;
      font-size: 1.05rem;
      font-weight: 500;
      padding: 12px 16px;
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: all 0.2s ease;
    }
    .drawer-nav-link:hover {
      color: #fff;
      background: rgba(255, 255, 255, 0.08);
      transform: translateX(4px);
    }
    .section-wrap {
      padding: 85px 0;
      position: relative;
    }
    .section-wrap.bg-alt {
      background-color: var(--bg-light);
    }
    .section-wrap.bg-dark-theme {
      background-color: var(--brand-dark);
      color: #F8FAFC;
    }
    .section-tag {
      display: inline-block;
      font-size: 0.8125rem;
      font-weight: 700;
      text-transform: uppercase;
      letter-spacing: 0.5px;
      padding: 4px 12px;
      border-radius: 50px;
      background: var(--brand-accent-light);
      color: var(--brand-primary);
      margin-bottom: 12px;
    }
    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-title.text-white {
      color: #fff !important;
    }
    .section-subtitle {
      font-size: 1rem;
      color: var(--text-muted);
      max-width: 720px;
      margin-bottom: 36px;
    }
    .section-subtitle.text-muted-dark {
      color: #94A3B8;
    }
    .hero-box {
      background: linear-gradient(135deg, #F0F6FF 0%, #FFFFFF 60%, #E8F4FD 100%);
      padding: 70px 0 90px;
      position: relative;
      overflow: hidden;
      border-bottom: 1px solid var(--border-color);
    }
    .hero-h1 {
      font-size: 2.85rem;
      font-weight: 800;
      line-height: 1.22;
      color: #0F294A;
      margin-bottom: 20px;
      letter-spacing: -0.5px;
    }
    .hero-lead {
      font-size: 1.05rem;
      color: #475569;
      margin-bottom: 28px;
    }
    .hero-lead-box {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border-color);
    }
    .app-card {
      background: #FFFFFF;
      border-radius: var(--radius-md);
      padding: 28px;
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
      display: flex;
      flex-direction: column;
    }
    .app-card:hover {
      transform: translateY(-5px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(15, 82, 186, 0.25);
    }
    .app-card-dark {
      background: var(--brand-dark-card);
      border: 1px solid rgba(255, 255, 255, 0.08);
      color: #E2E8F0;
    }
    .app-card-dark:hover {
      border-color: var(--brand-accent);
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.4);
    }
    .icon-box {
      width: 52px;
      height: 52px;
      border-radius: 12px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 1.5rem;
      margin-bottom: 18px;
      background: var(--brand-accent-light);
      color: var(--brand-primary);
    }
    .step-badge {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--brand-primary);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      font-size: 1rem;
      margin-bottom: 14px;
    }
    .metric-number {
      font-size: 2.75rem;
      font-weight: 800;
      color: var(--brand-primary);
      line-height: 1.1;
      margin-bottom: 6px;
      font-variant-numeric: tabular-nums;
    }
    .metric-label {
      font-size: 0.95rem;
      color: var(--text-muted);
      font-weight: 500;
    }
    .metric-sub {
      font-size: 0.8125rem;
      color: #94A3B8;
      margin-top: 4px;
    }
    .pricing-table-card {
      border-radius: var(--radius-md);
      overflow: hidden;
      border: 1px solid var(--border-color);
      background: #fff;
      box-shadow: var(--shadow-sm);
      transition: all 0.3s ease;
      height: 100%;
    }
    .pricing-table-card.featured {
      border: 2px solid var(--brand-primary);
      box-shadow: var(--shadow-hover);
      position: relative;
    }
    .pricing-ribbon {
      position: absolute;
      top: 16px;
      right: -32px;
      transform: rotate(45deg);
      background: var(--brand-accent);
      color: #fff;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 4px 34px;
      text-transform: uppercase;
    }
    .img-fluid-rounded {
      border-radius: var(--radius-md);
      width: 100%;
      height: auto;
      object-fit: cover;
    }
    .trust-bar-item {
      padding: 16px 20px;
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .news-card-img {
      height: 200px;
      object-fit: cover;
      border-top-left-radius: var(--radius-md);
      border-top-right-radius: var(--radius-md);
      width: 100%;
    }
    .faq-accordion .accordion-item {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm) !important;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-accordion .accordion-button {
      font-weight: 600;
      color: var(--text-main);
      padding: 18px 22px;
      background-color: #fff;
    }
    .faq-accordion .accordion-button:not(.collapsed) {
      color: var(--brand-primary);
      background-color: #F0F6FF;
      box-shadow: none;
    }
    .footer-main {
      background-color: #071224;
      color: #94A3B8;
      padding: 70px 0 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      font-size: 0.9rem;
    }
    .footer-title {
      color: #F8FAFC;
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 18px;
    }
    .footer-link {
      color: #94A3B8;
      display: block;
      margin-bottom: 10px;
      transition: color 0.2s ease;
    }
    .footer-link:hover {
      color: var(--brand-accent);
    }
    @media (max-width: 991.98px) {
      .hero-h1 { font-size: 2.1rem; }
      .section-title { font-size: 1.75rem; }
      .section-wrap { padding: 55px 0; }
    }