/* roulang page: index */
:root {
      --primary: #0F766E;
      --primary-dark: #115E59;
      --accent: #D97706;
      --dark-slate: #0B132B;
      --text-main: #0F172A;
      --text-muted: #334155;
      --border-soft: #E2E8F0;
    }
    html {
      scroll-behavior: smooth;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    }
    body {
      background-color: #F8FAFC;
      color: var(--text-main);
      overflow-x: hidden;
      line-height: 1.75;
    }
    .hero-skew-bg {
      clip-path: polygon(0 0, 100% 0, 100% 88%, 0 100%);
    }
    .badge-pill {
      display: inline-flex;
      align-items: center;
      padding: 0.25rem 0.85rem;
      border-radius: 9999px;
      font-size: 0.75rem;
      font-weight: 600;
      letter-spacing: 0.025em;
    }
    .content-card-hover {
      transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .content-card-hover:hover {
      transform: translateY(-4px);
      box-shadow: 0 12px 24px -6px rgba(15, 23, 42, 0.08);
    }