/* roulang page: index */
:root {
      --primary: #1A56DB;
      --primary-hover: #2563EB;
      --secondary: #F97316;
      --secondary-light: #FFF7ED;
      --bg: #F8FAFC;
      --surface: #FFFFFF;
      --text-main: #0F172A;
      --text-secondary: #475569;
      --text-muted: #64748B;
      --border-light: #E2E8F0;
      --radius-card: 16px;
      --radius-btn: 12px;
      --radius-sm: 8px;
      --shadow-card: 0 4px 24px rgba(0,0,0,0.06);
      --shadow-hover: 0 8px 32px rgba(0,0,0,0.10);
      --transition: all 0.25s ease;
      --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', system-ui, -apple-system, sans-serif;
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: var(--font-sans);
      background-color: var(--bg);
      color: var(--text-main);
      line-height: 1.7;
      margin: 0;
      padding: 0;
      -webkit-font-smoothing: antialiased;
    }

    h1, h2, h3, h4, .h1, .h2, .h3 {
      font-weight: 600;
      letter-spacing: -0.02em;
    }

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

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

    .container-custom {
      max-width: 1140px;
      margin: 0 auto;
      padding: 0 20px;
    }

    /* 卡片化导航面板 */
    .navbar-custom {
      background: var(--surface);
      border-radius: 20px;
      box-shadow: 0 8px 28px rgba(0,0,0,0.05);
      padding: 12px 24px;
      margin: 16px auto 0;
      max-width: 1140px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      backdrop-filter: blur(4px);
      transition: var(--transition);
    }

    .logo-brand {
      font-size: 1.8rem;
      font-weight: 700;
      color: var(--primary);
      letter-spacing: -0.5px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .logo-brand i {
      color: var(--secondary);
      font-size: 2rem;
    }

    .nav-links {
      display: flex;
      gap: 8px;
      align-items: center;
      flex-wrap: wrap;
    }

    .nav-item-custom {
      background: #F1F5F9;
      border-radius: 30px;
      padding: 8px 18px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: var(--transition);
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.95rem;
    }
    .nav-item-custom i {
      font-size: 1rem;
      color: var(--secondary);
    }
    .nav-item-custom:hover {
      background: #E2E8F0;
      color: var(--primary);
    }

    .btn-cta {
      background: var(--secondary);
      color: white;
      border-radius: 30px;
      padding: 10px 24px;
      font-weight: 600;
      border: none;
      transition: var(--transition);
      box-shadow: 0 4px 10px rgba(249,115,22,0.3);
      white-space: nowrap;
    }
    .btn-cta:hover {
      background: #EA580C;
      box-shadow: 0 8px 18px rgba(249,115,22,0.4);
      color: white;
    }

    .btn-primary-custom {
      background: linear-gradient(135deg, #1A56DB 0%, #2563EB 100%);
      border: none;
      color: white;
      border-radius: var(--radius-btn);
      padding: 12px 28px;
      font-weight: 600;
      transition: var(--transition);
      box-shadow: 0 8px 18px rgba(26,86,219,0.25);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .btn-primary-custom:hover {
      background: linear-gradient(135deg, #1E40AF, #1D4ED8);
      box-shadow: 0 12px 24px rgba(26,86,219,0.35);
      transform: translateY(-1px);
      color: white;
    }

    .btn-outline-orange {
      border: 2px solid var(--secondary);
      color: var(--secondary);
      background: transparent;
      border-radius: var(--radius-btn);
      padding: 10px 24px;
      font-weight: 600;
      transition: var(--transition);
    }
    .btn-outline-orange:hover {
      background: var(--secondary-light);
      border-color: #EA580C;
      color: #C2410C;
    }

    section {
      padding: 80px 0;
    }

    .section-title h2 {
      font-size: 2.4rem;
      font-weight: 700;
      margin-bottom: 0.5rem;
      color: var(--text-main);
    }
    .section-title .divider {
      width: 60px;
      height: 4px;
      background: var(--secondary);
      border-radius: 4px;
      margin: 12px auto 20px;
    }

    .card-custom {
      background: var(--surface);
      border-radius: var(--radius-card);
      padding: 28px 22px;
      box-shadow: var(--shadow-card);
      transition: var(--transition);
      height: 100%;
      border: 1px solid rgba(0,0,0,0.02);
    }
    .card-custom:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-4px);
    }

    .icon-circle {
      width: 56px;
      height: 56px;
      background: rgba(249,115,22,0.1);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--secondary);
      font-size: 1.8rem;
      margin-bottom: 16px;
    }

    .hero-bg {
      background-image: url('/assets/images/backpic/back-1.webp');
      background-size: cover;
      background-position: center;
      position: relative;
      border-radius: 32px;
      overflow: hidden;
      min-height: 500px;
      display: flex;
      align-items: center;
      margin-top: 24px;
    }
    .hero-overlay {
      background: rgba(255,255,255,0.88);
      backdrop-filter: blur(6px);
      width: 100%;
      height: 100%;
      padding: 60px 40px;
    }

    .scenario-scroll {
      display: flex;
      gap: 24px;
      overflow-x: auto;
      padding-bottom: 16px;
      scrollbar-width: thin;
    }
    .scenario-card {
      min-width: 280px;
      background: white;
      border-radius: 20px;
      padding: 24px;
      box-shadow: var(--shadow-card);
      flex-shrink: 0;
    }

    .case-tag {
      background: var(--secondary);
      color: white;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      position: absolute;
      top: 14px;
      left: 14px;
    }

    .pricing-popular {
      border: 2px solid var(--primary);
      position: relative;
    }
    .popular-badge {
      background: var(--primary);
      color: white;
      font-size: 0.7rem;
      font-weight: 700;
      padding: 4px 12px;
      border-radius: 20px;
      position: absolute;
      top: -12px;
      right: 20px;
    }

    .faq-card {
      background: #F1F5F9;
      border-radius: 12px;
      padding: 16px 20px;
      margin-bottom: 12px;
      border-left: 4px solid transparent;
      transition: var(--transition);
    }
    .faq-card.active {
      border-left-color: var(--primary);
      background: white;
      box-shadow: 0 4px 14px rgba(0,0,0,0.04);
    }

    footer {
      background: #0F172A;
      color: #CBD5E1;
      padding: 60px 0 30px;
    }
    footer a {
      color: #94A3B8;
      transition: color 0.2s;
    }
    footer a:hover {
      color: var(--secondary);
    }

    @media (max-width: 768px) {
      .navbar-custom {
        flex-wrap: wrap;
      }
      .nav-links {
        gap: 4px;
        margin-top: 10px;
      }
      .hero-bg {
        border-radius: 20px;
      }
      section {
        padding: 50px 0;
      }
      h1 {
        font-size: 2.4rem !important;
      }
      .btn-cta, .btn-primary-custom {
        width: 100%;
        justify-content: center;
      }
    }