/* roulang page: index */
:root {
      --primary-dark: #0F172A;
      --primary-black: #020617;
      --accent-cyan: #06B6D4;
      --accent-emerald: #10B981;
      --accent-indigo: #6366F1;
      --neutral-canvas: #F8FAFC;
      --neutral-card: #FFFFFF;
      --neutral-border: #E2E8F0;
      --text-main: #1E293B;
      --text-sub: #64748B;
    }

    /* 基础重置 */
    *, *::before, *::after {
      box-sizing: border-box;
    }
    body {
      background-color: var(--neutral-canvas);
      color: var(--text-main);
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      overflow-x: hidden;
      line-height: 1.6;
    }

    /* 斜切色块与背景样式 */
    .hero-skew-shape {
      clip-path: polygon(0 0, 100% 0, 100% 86%, 0 100%);
    }
    @media (max-width: 768px) {
      .hero-skew-shape {
        clip-path: polygon(0 0, 100% 0, 100% 94%, 0 100%);
      }
    }

    /* 发光边框与卡片悬浮 */
    .tech-card {
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
      border: 1px solid var(--neutral-border);
    }
    .tech-card:hover {
      transform: translateY(-4px);
      box-shadow: 0 14px 28px -8px rgba(6, 182, 212, 0.15), 0 6px 12px -4px rgba(15, 23, 42, 0.08);
      border-color: rgba(6, 182, 212, 0.4);
    }

    /* 倒计时数字闪烁微动 */
    @keyframes pulse-subtle {
      0%, 100% { opacity: 1; }
      50% { opacity: 0.85; }
    }
    .timer-badge {
      animation: pulse-subtle 2s infinite ease-in-out;
    }

    /* 手风琴平滑 */
    details summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary .faq-icon {
      transform: rotate(180deg);
    }

    /* 表格滚动与对齐 */
    .table-responsive-wrapper {
      scrollbar-width: thin;
      scrollbar-color: #cbd5e1 #f1f5f9;
    }