/* roulang page: index */
:root {
      --primary: #0F242A;
      --accent: #00D084;
      --secondary: #334E68;
      --surface: #F7F9FA;
      --card-border: #E2E8F0;
      --text-main: #102A43;
      --text-body: #486581;
      --text-muted: #829AB1;
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.75;
      color: var(--text-body);
      background-color: var(--surface);
      overflow-x: hidden;
    }

    h1, h2, h3, h4, h5, h6 {
      color: var(--text-main);
      letter-spacing: -0.02em;
      line-height: 1.35;
      font-weight: 700;
    }

    p {
      margin-bottom: 1.25rem;
    }

    .card-hover {
      transition: all 0.28s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 28px -4px rgba(15, 36, 42, 0.12);
    }

    .glass-dark {
      background: rgba(11, 25, 30, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .badge-glow {
      box-shadow: 0 0 12px rgba(0, 208, 132, 0.35);
    }

    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }