/* roulang page: index */
:root {
      --primary: #5B21B6;
      --primary-light: #7C3AED;
      --accent-cyan: #06B6D4;
      --accent-green: #10B981;
      --bg-dark: #090D16;
      --card-dark: #0F172A;
      --text-main: #0F172A;
      --text-muted: #475569;
      --transition-smooth: all 0.3s cubic-bezier(0.16, 1, 0.3, 1);
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      background-color: #F8FAFC;
      color: #0F172A;
      font-family: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', sans-serif;
      overflow-x: hidden;
    }

    .ease-spring {
      transition: var(--transition-smooth);
    }

    .card-shadow {
      box-shadow: 0 4px 20px -2px rgba(0, 0, 0, 0.05);
    }
    .card-shadow:hover {
      box-shadow: 0 12px 30px -4px rgba(91, 33, 182, 0.12);
      transform: translateY(-4px);
    }

    .glass-header {
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
    }

    .dark-card-border {
      border: 1px solid rgba(255, 255, 255, 0.08);
    }

    .glow-cyan {
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
    }

    .glow-purple {
      box-shadow: 0 0 30px rgba(124, 58, 237, 0.3);
    }

    /* 原生 summary 箭头清理与微调 */
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }