/* roulang page: index */
:root {
      --primary-dark: #0F172A;
      --primary-surface: #0B0F19;
      --accent-green: #00D285;
      --accent-blue: #2563EB;
      --text-main: #0F172A;
      --text-sub: #334155;
      --text-light: #64748B;
      --bg-page: #F8FAFC;
      --radius-sm: 4px;
      --radius-md: 8px;
      --radius-lg: 16px;
      --radius-xl: 24px;
      --card-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.05);
      --card-shadow-hover: 0 12px 28px -4px rgba(15, 23, 42, 0.12);
    }
    body {
      background-color: var(--bg-page);
      color: var(--text-sub);
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
    }
    .custom-card {
      border: 1px solid rgba(226, 232, 240, 0.85);
      box-shadow: var(--card-shadow);
      transition: all 0.25s ease-in-out;
    }
    .custom-card:hover {
      box-shadow: var(--card-shadow-hover);
      transform: translateY(-2px);
    }
    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: var(--accent-green);
      box-shadow: 0 0 0 0 rgba(0, 210, 133, 0.7);
      animation: pulse 2s infinite;
    }
    @keyframes pulse {
      0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 210, 133, 0.7); }
      70% { transform: scale(1); box-shadow: 0 0 0 8px rgba(0, 210, 133, 0); }
      100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 210, 133, 0); }
    }
    .dot-matrix-bg {
      background-image: radial-gradient(rgba(148, 163, 184, 0.18) 1px, transparent 1px);
      background-size: 16px 16px;
    }
    .floating-cta-bar {
      position: fixed;
      bottom: 0;
      left: 0;
      right: 0;
      z-index: 45;
      background: rgba(15, 23, 42, 0.94);
      backdrop-filter: blur(10px);
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      transform: translateY(120%);
      transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .floating-cta-bar.visible {
      transform: translateY(0);
    }