/* roulang page: index */
:root {
      --bg-dark: #0a0f1d;
      --bg-surface: #0f172a;
      --card-bg: rgba(30, 41, 59, 0.72);
      --card-border: rgba(255, 255, 255, 0.08);
      --accent-blue: #0ea5e9;
      --accent-electric: #3b82f6;
      --accent-mint: #10b981;
      --text-main: #f8fafc;
      --text-sub: #94a3b8;
    }

    body {
      background-color: var(--bg-dark);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      scroll-behavior: smooth;
    }

    .glass-card {
      background: var(--card-bg);
      backdrop-filter: blur(14px);
      -webkit-backdrop-filter: blur(14px);
      border: 1px solid var(--card-border);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    .glass-card:hover {
      border-color: rgba(14, 165, 233, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 12px 30px -10px rgba(14, 165, 233, 0.25);
    }

    .glow-btn {
      background: linear-gradient(135deg, #0ea5e9, #3b82f6);
      box-shadow: 0 0 22px rgba(14, 165, 233, 0.45);
      transition: all 0.3s ease;
    }

    .glow-btn:hover {
      box-shadow: 0 0 32px rgba(14, 165, 233, 0.75);
      transform: translateY(-2px);
    }

    .section-divider {
      position: relative;
    }

    .section-divider::before {
      content: "";
      position: absolute;
      top: 0;
      left: 10%;
      right: 10%;
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.08), transparent);
    }

    .hero-glow {
      position: absolute;
      width: 600px;
      height: 600px;
      background: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, rgba(10, 15, 29, 0) 70%);
      top: -150px;
      right: -100px;
      pointer-events: none;
      z-index: 0;
    }

    /* 滚动条定制 */
    ::-webkit-scrollbar {
      width: 8px;
    }
    ::-webkit-scrollbar-track {
      background: #0a0f1d;
    }
    ::-webkit-scrollbar-thumb {
      background: #1e293b;
      border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
      background: #334155;
    }