/* roulang page: index */
:root {
      --primary-navy: #0f172a;
      --accent-blue: #0284c7;
      --accent-gold: #d97706;
      --bg-page: #f8fafc;
      --card-border: #e2e8f0;
      --text-main: #1e293b;
      --text-muted: #64748b;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .custom-shadow-lg {
      box-shadow: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.96) 0%, rgba(30, 41, 59, 0.92) 100%);
    }
    .ranking-badge {
      font-feature-settings: "tnum";
    }
    .line-clamp-2 {
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
    }

/* roulang page: category1 */
:root {
      --primary-navy: #0f172a;
      --accent-blue: #0284c7;
      --accent-gold: #d97706;
      --bg-page: #f8fafc;
      --card-border: #e2e8f0;
      --text-main: #1e293b;
      --text-muted: #64748b;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .custom-shadow-lg {
      box-shadow: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.96) 0%, rgba(30, 41, 59, 0.92) 100%);
    }
    .ranking-badge {
      font-feature-settings: "tnum";
    }

/* roulang page: category3 */
:root {
      --primary-navy: #0f172a;
      --accent-blue: #0284c7;
      --accent-gold: #d97706;
      --bg-page: #f8fafc;
      --card-border: #e2e8f0;
      --text-main: #1e293b;
      --text-muted: #64748b;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .custom-shadow-lg {
      box-shadow: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.96) 0%, rgba(30, 41, 59, 0.92) 100%);
    }
    .ranking-badge {
      font-feature-settings: "tnum";
    }
    .badge-soft-blue {
      background-color: #e0f2fe;
      color: #0369a1;
    }
    .badge-soft-amber {
      background-color: #fef3c7;
      color: #b45309;
    }

/* roulang page: category4 */
:root {
      --primary-navy: #0f172a;
      --accent-blue: #0284c7;
      --accent-gold: #d97706;
      --bg-page: #f8fafc;
      --card-border: #e2e8f0;
      --text-main: #1e293b;
      --text-muted: #64748b;
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--bg-page);
      color: var(--text-main);
      overflow-x: hidden;
    }
    .custom-shadow {
      box-shadow: 0 4px 20px -2px rgba(15, 23, 42, 0.06), 0 2px 6px -1px rgba(15, 23, 42, 0.04);
    }
    .custom-shadow-lg {
      box-shadow: 0 10px 25px -3px rgba(15, 23, 42, 0.08), 0 4px 10px -2px rgba(15, 23, 42, 0.04);
    }
    .hero-gradient {
      background: linear-gradient(135deg, rgba(15, 23, 42, 0.96) 0%, rgba(30, 41, 59, 0.92) 100%);
    }
    .code-box {
      background-color: #0b1120;
      border: 1px solid #1e293b;
      font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;
    }