/* roulang page: index */
:root {
      --color-primary: #0F2C59;
      --color-teal: #00C49F;
      --color-accent: #FF5A36;
      --color-bg: #F8FAFC;
      --color-night: #0B132B;
      --color-text-main: #0F172A;
      --color-text-body: #334155;
      --color-text-muted: #64748B;
      --shadow-soft: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --shadow-hover: 0 12px 30px -4px rgba(0, 196, 159, 0.18);
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: var(--color-bg);
      color: var(--color-text-body);
      overflow-x: hidden;
    }

    .btn-gradient-primary {
      background: linear-gradient(135deg, #0F2C59 0%, #00C49F 100%);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-gradient-primary:hover {
      box-shadow: 0 8px 24px -2px rgba(0, 196, 159, 0.35);
      transform: translateY(-2px);
    }

    .btn-gradient-accent {
      background: linear-gradient(135deg, #FF5A36 0%, #FF8A00 100%);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .btn-gradient-accent:hover {
      box-shadow: 0 8px 24px -2px rgba(255, 90, 54, 0.35);
      transform: translateY(-2px);
    }

    .card-modern {
      background: #FFFFFF;
      border-radius: 16px;
      box-shadow: var(--shadow-soft);
      border: 1px solid rgba(226, 232, 240, 0.8);
      transition: all 0.3s ease;
    }
    .card-modern:hover {
      box-shadow: var(--shadow-hover);
      border-color: rgba(0, 196, 159, 0.4);
      transform: translateY(-4px);
    }

    .badge-capsule {
      display: inline-flex;
      align-items: center;
      padding: 0.35rem 0.85rem;
      border-radius: 9999px;
      font-size: 0.825rem;
      font-weight: 600;
    }

    /* 原生手风琴细节优化 */
    details summary::-webkit-details-marker {
      display: none;
    }
    details summary {
      list-style: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }
    details[open] {
      background-color: #F1F5F9;
    }