/* roulang page: index */
:root {
      --bg-dark: #070B19;
      --bg-sub: #0C1427;
      --neon-blue: #00C2FF;
      --neon-cyan: #00E5BE;
      --accent-purple: #6366F1;
      --text-main: #FFFFFF;
      --text-muted: #94A3B8;
    }
    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
    }
    body {
      background-color: var(--bg-dark);
      color: #E2E8F0;
      overflow-x: hidden;
      margin: 0;
      padding: 0;
    }
    /* 玻璃拟态卡片 */
    .glass-card {
      background: rgba(17, 24, 43, 0.75);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border: 1px solid rgba(255, 255, 255, 0.09);
      box-shadow: 0 20px 40px -15px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .glass-card:hover {
      border-color: rgba(0, 194, 255, 0.35);
      transform: translateY(-4px);
      box-shadow: 0 24px 50px -12px rgba(0, 194, 255, 0.15), inset 0 1px 0 rgba(255, 255, 255, 0.2);
    }
    /* 发光按钮 */
    .btn-glow {
      background: linear-gradient(135deg, #00C2FF 0%, #0072FF 100%);
      box-shadow: 0 0 22px rgba(0, 194, 255, 0.45);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 32px rgba(0, 194, 255, 0.75);
      transform: scale(1.02);
    }
    .btn-outline-glow {
      border: 1px solid rgba(0, 194, 255, 0.4);
      background: rgba(0, 194, 255, 0.05);
      color: #00C2FF;
      box-shadow: 0 0 15px rgba(0, 194, 255, 0.15);
      transition: all 0.25s ease;
    }
    .btn-outline-glow:hover {
      background: rgba(0, 194, 255, 0.15);
      border-color: #00C2FF;
      box-shadow: 0 0 25px rgba(0, 194, 255, 0.35);
    }
    /* 径向光晕背景 */
    .glow-radial {
      background: radial-gradient(circle at 50% 30%, rgba(0, 194, 255, 0.08) 0%, rgba(99, 102, 241, 0.05) 45%, rgba(7, 11, 25, 0) 70%);
    }
    /* 指示灯脉冲 */
    @keyframes pulse-glow {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.4; transform: scale(0.9); }
    }
    .pulse-dot {
      animation: pulse-glow 2s infinite ease-in-out;
    }