/* roulang page: index */
:root {
      --primary: hsl(196, 90%, 35%);
      --accent: hsl(28, 95%, 52%);
      --bg-light: hsl(210, 20%, 98%);
      --card-bg: hsl(0, 0%, 100%);
      --text-main: hsl(215, 25%, 12%);
      --text-muted: hsl(215, 15%, 40%);
      --border-color: hsl(215, 18%, 90%);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-light);
      color: var(--text-main);
      line-height: 1.6;
      overflow-x: hidden;
    }

    /* 滚动条美化 */
    ::-webkit-scrollbar {
      width: 8px;
    }
    ::-webkit-scrollbar-track {
      background: #f1f5f9;
    }
    ::-webkit-scrollbar-thumb {
      background: #cbd5e1;
      border-radius: 4px;
    }
    ::-webkit-scrollbar-thumb:hover {
      background: #94a3b8;
    }

    .interactive-card {
      transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
    }
    .interactive-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 14px 30px -10px rgba(14, 116, 144, 0.12);
    }

    /* 状态脉冲 */
    .pulse-dot {
      display: inline-block;
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10b981;
      box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      animation: pulse-ring 2s infinite;
    }
    @keyframes pulse-ring {
      0% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7);
      }
      70% {
        box-shadow: 0 0 0 8px rgba(16, 185, 129, 0);
      }
      100% {
        box-shadow: 0 0 0 0 rgba(16, 185, 129, 0);
      }
    }