/* roulang page: index */
:root {
      --primary-navy: #1E3A8A;
      --primary-teal: #0D9488;
      --accent-green: #10B981;
      --accent-amber: #F59E0B;
      --bg-slate-soft: #F8FAFC;
      --bg-slate-subtle: #F1F5F9;
      --text-main: #0F172A;
      --text-muted: #475569;
      --dark-card: #0B132B;
      --radius-card: 1.5rem;
      --shadow-soft: 0 12px 36px -6px rgba(15, 23, 42, 0.08), 0 4px 12px -2px rgba(15, 23, 42, 0.04);
      --shadow-hover: 0 20px 40px -10px rgba(13, 148, 136, 0.18), 0 8px 16px -4px rgba(15, 23, 42, 0.06);
    }

    html {
      scroll-behavior: smooth;
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }

    body {
      background-color: var(--bg-slate-soft);
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.65;
    }

    /* 品牌主色渐变背景 */
    .bg-gradient-brand {
      background: linear-gradient(135deg, #1E293B 0%, #1E3A8A 50%, #0D9488 100%);
    }

    .bg-gradient-accent {
      background: linear-gradient(135deg, #0D9488 0%, #10B981 100%);
    }

    .text-gradient {
      background: linear-gradient(135deg, #0F172A 0%, #0D9488 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    .text-gradient-light {
      background: linear-gradient(135deg, #FFFFFF 0%, #A7F3D0 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }

    /* 现代大圆角卡片 */
    .feature-card {
      border-radius: var(--radius-card);
      box-shadow: var(--shadow-soft);
      transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
      border: 1px solid rgba(226, 232, 240, 0.8);
      background: #FFFFFF;
    }

    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-hover);
      border-color: rgba(13, 148, 136, 0.4);
    }

    /* 数据徽章 */
    .pill-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      padding: 0.35rem 0.875rem;
      border-radius: 9999px;
      font-size: 0.8125rem;
      font-weight: 600;
      border: 1px solid rgba(13, 148, 136, 0.25);
      background-color: rgba(13, 148, 136, 0.08);
      color: #0F766E;
    }

    .pill-badge-dark {
      background-color: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.2);
      color: #A7F3D0;
    }

    .indicator-pulse {
      width: 0.5rem;
      height: 0.5rem;
      border-radius: 50%;
      background-color: var(--accent-green);
      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); }
    }

    /* 自定义手风琴动效 */
    .accordion-item[open] summary svg {
      transform: rotate(180deg);
    }