/* roulang page: index */
:root {
      --color-primary: #1E3A8A;
      --color-accent-start: #2563EB;
      --color-accent-end: #0D9488;
      --color-bg-light: #F8FAFC;
      --color-bg-white: #FFFFFF;
      --color-text-main: #0F172A;
      --color-text-muted: #64748B;
      --color-border: #E2E8F0;
      --radius-card: 1.25rem;
      --shadow-soft: 0 10px 30px -10px rgba(15, 23, 42, 0.08);
      --shadow-hover: 0 20px 40px -15px rgba(37, 99, 235, 0.15);
    }
    
    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans, -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif);
      color: var(--color-text-main);
      background-color: #FFFFFF;
      overflow-x: hidden;
    }

    .glass-nav {
      background: rgba(255, 255, 255, 0.94);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }

    .badge-pill {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.35rem 0.9rem;
      border-radius: 9999px;
      font-size: 0.875rem;
      font-weight: 500;
      background: rgba(37, 99, 235, 0.08);
      color: #1d4ed8;
      border: 1px solid rgba(37, 99, 235, 0.16);
    }

    .badge-pill-dot {
      width: 0.5rem;
      height: 0.5rem;
      border-radius: 9999px;
      background-color: #0d9488;
      box-shadow: 0 0 8px rgba(13, 148, 136, 0.6);
    }

    .gradient-brand {
      background: linear-gradient(135deg, #2563EB 0%, #0D9488 100%);
    }

    .gradient-brand-text {
      background: linear-gradient(135deg, #1e40af 0%, #0d9488 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .card-modern {
      background: #FFFFFF;
      border-radius: var(--radius-card);
      border: 1px solid #F1F5F9;
      box-shadow: var(--shadow-soft);
      transition: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    .card-modern:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: #CBD5E1;
    }

    .btn-primary {
      background: linear-gradient(135deg, #2563EB 0%, #0D9488 100%);
      color: #FFFFFF;
      font-weight: 600;
      border-radius: 0.75rem;
      padding: 0.75rem 1.75rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      transition: all 0.25s ease;
      box-shadow: 0 4px 14px 0 rgba(37, 99, 235, 0.25);
    }

    .btn-primary:hover {
      opacity: 0.95;
      transform: translateY(-1px);
      box-shadow: 0 6px 20px 0 rgba(37, 99, 235, 0.35);
    }

    .btn-secondary {
      background: #FFFFFF;
      color: #1E293B;
      font-weight: 600;
      border: 1px solid #CBD5E1;
      border-radius: 0.75rem;
      padding: 0.75rem 1.75rem;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      transition: all 0.25s ease;
    }

    .btn-secondary:hover {
      background: #F8FAFC;
      border-color: #94A3B8;
      color: #0F172A;
    }

    .stat-number {
      font-feature-settings: "tnum";
      font-variant-numeric: tabular-nums;
    }

    /* 常见问题手风琴原生样式 */
    details[open] summary svg {
      transform: rotate(180deg);
    }