/* roulang page: index */
:root {
      --primary: #1F2421;
      --primary-dark: #121413;
      --accent: #C05A3E;
      --accent-hover: #A6472D;
      --bg-cream: #FAF9F6;
      --bg-oat: #F4F1EA;
      --border-subtle: #E2DFD8;
      --text-main: #2B2D2F;
      --text-muted: #5F6368;
    }
    html {
      scroll-behavior: smooth;
      scroll-padding-top: 86px;
      font-family: system-ui, -apple-system, "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
      color: var(--text-main);
      background-color: var(--bg-cream);
    }
    .hero-mask {
      background: linear-gradient(135deg, rgba(18, 20, 19, 0.88) 0%, rgba(31, 36, 33, 0.78) 55%, rgba(192, 90, 62, 0.62) 100%);
    }
    .video-overlay-diag {
      clip-path: polygon(0 0, 100% 0, 100% 92%, 0 100%);
    }
    .card-hover-transition {
      transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.3s cubic-bezier(0.16, 1, 0.3, 1), border-color 0.3s ease;
    }
    .card-hover-transition:hover {
      transform: translateY(-5px);
      box-shadow: 0 16px 36px rgba(18, 20, 19, 0.08);
      border-color: #D3CDC2;
    }
    details summary::-webkit-details-marker {
      display: none;
    }
    .number-display {
      font-family: Didot, "Bodoni MT", "Cinzel", "Times New Roman", serif;
      letter-spacing: -0.03em;
    }
    .custom-scroll-hide::-webkit-scrollbar {
      display: none;
    }