/* roulang page: index */
:root {
      --primary-color: #1e56a0;
      --primary-hover: #163f74;
      --secondary-color: #00a8cc;
      --accent-color: #f69d3c;
      --bg-light: #f5f8fc;
      --bg-white: #ffffff;
      --text-main: #1f2937;
      --text-muted: #64748b;
      --card-border: #e2e8f0;
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --shadow-sm: 0 4px 12px rgba(30, 86, 160, 0.05);
      --shadow-md: 0 10px 24px rgba(30, 86, 160, 0.08);
      --shadow-lg: 0 18px 36px rgba(30, 86, 160, 0.12);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-light);
      line-height: 1.68;
    }
    a {
      text-decoration: none;
      color: inherit;
      transition: all 0.25s ease;
    }
    .navbar {
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(10px);
      box-shadow: 0 2px 14px rgba(0,0,0,0.04);
      padding: 0.85rem 0;
    }
    .brand-logo {
      font-size: 1.55rem;
      font-weight: 800;
      color: var(--primary-color);
      letter-spacing: -0.5px;
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .brand-logo span {
      background: var(--primary-color);
      color: #fff;
      padding: 2px 8px;
      border-radius: var(--radius-sm);
      font-size: 0.85rem;
      font-weight: 600;
    }
    .nav-link {
      font-weight: 500;
      color: #475569 !important;
      padding: 0.5rem 1rem !important;
      border-radius: var(--radius-sm);
    }
    .nav-link:hover, .nav-link.active {
      color: var(--primary-color) !important;
      background: #eff6ff;
    }
    .btn-main {
      background: var(--primary-color);
      color: #fff;
      font-weight: 600;
      padding: 0.65rem 1.6rem;
      border-radius: var(--radius-sm);
      border: 1px solid var(--primary-color);
    }
    .btn-main:hover {
      background: var(--primary-hover);
      color: #fff;
      box-shadow: 0 6px 16px rgba(30, 86, 160, 0.25);
    }
    .btn-outline-main {
      border: 1px solid #cbd5e1;
      background: #fff;
      color: var(--text-main);
      font-weight: 600;
      padding: 0.65rem 1.4rem;
      border-radius: var(--radius-sm);
    }
    .btn-outline-main:hover {
      background: #f8fafc;
      border-color: #94a3b8;
    }
    .badge-soft {
      background-color: #dbeafe;
      color: var(--primary-color);
      font-weight: 600;
      padding: 0.35rem 0.75rem;
      border-radius: 99px;
      font-size: 0.78rem;
    }
    .section-wrap {
      padding: 4.5rem 0;
    }
    .section-alt {
      background-color: var(--bg-white);
    }
    .section-title {
      font-weight: 700;
      font-size: 1.85rem;
      color: #0f172a;
      margin-bottom: 0.6rem;
      letter-spacing: -0.3px;
    }
    .section-desc {
      color: var(--text-muted);
      font-size: 0.96rem;
      max-width: 680px;
      margin-bottom: 2.2rem;
    }
    .app-card {
      background: #fff;
      border-radius: var(--radius-md);
      border: 1px solid var(--card-border);
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
      height: 100%;
      overflow: hidden;
    }
    .app-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-md);
      border-color: #cbd5e1;
    }
    /* Bento Hero */
    .hero-bento {
      padding: 3rem 0 2rem;
    }
    .bento-main {
      background: linear-gradient(135deg, #1e56a0 0%, #163f74 100%);
      color: #fff;
      border-radius: var(--radius-lg);
      padding: 2.8rem;
      height: 100%;
      position: relative;
      overflow: hidden;
      box-shadow: var(--shadow-lg);
    }
    .bento-main::after {
      content: "";
      position: absolute;
      width: 280px;
      height: 280px;
      background: radial-gradient(circle, rgba(255,255,255,0.12) 0%, rgba(255,255,255,0) 70%);
      top: -50px;
      right: -50px;
      pointer-events: none;
    }
    .bento-sub {
      background: #fff;
      border-radius: var(--radius-lg);
      border: 1px solid var(--card-border);
      padding: 1.8rem;
      box-shadow: var(--shadow-sm);
      height: calc(50% - 0.65rem);
    }
    .bento-sub:first-child {
      margin-bottom: 1.3rem;
    }
    .cta-banner-strip {
      background: #0f172a;
      color: #fff;
      border-radius: var(--radius-md);
      padding: 1.25rem 2rem;
      margin-top: 1.3rem;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 1rem;
    }
    /* Career / Topics Card */
    .job-badge {
      font-size: 0.75rem;
      padding: 0.25rem 0.6rem;
      border-radius: 4px;
      background: #f1f5f9;
      color: #475569;
    }
    .step-num {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: #eff6ff;
      color: var(--primary-color);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      margin-bottom: 1rem;
    }
    .avatar-sm {
      width: 44px;
      height: 44px;
      border-radius: 50%;
      object-fit: cover;
    }
    .faq-item {
      border: 1px solid var(--card-border);
      background: #fff;
      border-radius: var(--radius-sm);
      padding: 1.2rem 1.4rem;
      margin-bottom: 0.9rem;
    }
    .footer-section {
      background: #0b1320;
      color: #94a3b8;
      padding: 4rem 0 2rem;
      font-size: 0.9rem;
    }
    .footer-section a:hover {
      color: #fff;
    }
    .footer-bottom {
      border-top: 1px solid #1e293b;
      margin-top: 3rem;
      padding-top: 1.8rem;
      font-size: 0.82rem;
    }
    @media (max-width: 991px) {
      .bento-sub { height: auto; margin-bottom: 1rem !important; }
      .bento-main { margin-bottom: 1rem; padding: 2rem 1.5rem; }
    }