/* roulang page: index */
:root {
      --bg-base: #0B0F17;
      --card-base: #121824;
      --brand-primary: #00DC82;
      --brand-hover: #059669;
      --border-color: #1E293B;
      --text-main: #F1F5F9;
      --text-muted: #94A3B8;
    }
    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }
    body {
      background-color: var(--bg-base);
      color: var(--text-main);
      font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', system-ui, sans-serif;
      line-height: 1.7;
      overflow-x: hidden;
    }
    .custom-scrollbar::-webkit-scrollbar {
      width: 6px;
      height: 6px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb {
      background: #1E293B;
      border-radius: 3px;
    }
    .custom-scrollbar::-webkit-scrollbar-thumb:hover {
      background: #00DC82;
    }
    .mesh-glow {
      background-image: radial-gradient(circle at 50% -20%, rgba(0, 220, 130, 0.12) 0%, rgba(11, 15, 23, 0) 70%);
    }
    .glow-border {
      border: 1px solid rgba(255, 255, 255, 0.08);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
    }
    .glow-border:hover {
      border-color: rgba(0, 220, 130, 0.4);
      box-shadow: 0 10px 30px -10px rgba(0, 220, 130, 0.15);
    }
    .accordion-content {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease-out, opacity 0.25s ease;
      opacity: 0;
    }
    .accordion-content.open {
      max-height: 480px;
      opacity: 1;
    }