/* roulang page: index */
:root {
      --primary: #1E40AF;
      --secondary: #0284C7;
      --accent: #F97316;
      --dark: #0F172A;
      --bg-light: #F8FAFC;
      --text-main: #334155;
      --text-muted: #64748B;
    }
    body {
      color: var(--text-main);
      background-color: var(--bg-light);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    .hero-bg {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.88) 0%, rgba(30, 64, 175, 0.82) 100%), url('/assets/images/de01c965fc377f2a.webp') center/cover no-repeat;
    }
    .custom-card-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
    }
    .custom-card-shadow:hover {
      box-shadow: 0 16px 32px -4px rgba(30, 64, 175, 0.12);
    }
    /* 平滑过渡与微交互 */
    .btn-brand-primary {
      background-color: var(--accent);
      color: #ffffff;
      transition: all 0.25s ease-in-out;
    }
    .btn-brand-primary:hover {
      background-color: #EA580C;
      transform: translateY(-1px);
      box-shadow: 0 4px 12px rgba(249, 115, 22, 0.35);
    }
    .faq-answer {
      transition: max-height 0.3s ease-out, opacity 0.3s ease;
    }