/* roulang page: index */
:root {
      --primary: #2563EB;
      --primary-hover: #1D4ED8;
      --accent: #0284C7;
      --surface-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--surface-bg);
      color: var(--text-body);
      line-height: 1.65;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }
    .sandbox-grid {
      background-size: 24px 24px;
      background-image: radial-gradient(rgba(148, 163, 184, 0.2) 1px, transparent 1px);
    }
    .dock-shadow {
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }
    details > summary {
      list-style: none;
    }
    details > summary::-webkit-details-marker {
      display: none;
    }
    details[open] summary svg {
      transform: rotate(180deg);
    }
    details[open] {
      background-color: #EFF6FF;
    }

/* roulang page: article */
:root {
      --primary: #2563EB;
      --primary-hover: #1D4ED8;
      --accent: #0284C7;
      --surface-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--surface-bg);
      color: var(--text-body);
      line-height: 1.65;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }
    .sandbox-grid {
      background-size: 24px 24px;
      background-image: radial-gradient(rgba(148, 163, 184, 0.2) 1px, transparent 1px);
    }
    .dock-shadow {
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }
    .article-content {
      font-size: 16px;
      line-height: 1.8;
      color: #334155;
    }
    .article-content h2 {
      font-size: 1.5rem;
      font-weight: 700;
      color: #0F172A;
      margin-top: 2rem;
      margin-bottom: 1rem;
      padding-bottom: 0.5rem;
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
    }
    .article-content h3 {
      font-size: 1.25rem;
      font-weight: 600;
      color: #0F172A;
      margin-top: 1.5rem;
      margin-bottom: 0.75rem;
    }
    .article-content p {
      margin-bottom: 1.25rem;
      text-align: justify;
    }
    .article-content blockquote {
      border-left: 4px solid #2563EB;
      background-color: #EFF6FF;
      padding: 0.875rem 1.25rem;
      margin: 1.5rem 0;
      border-radius: 0 0.5rem 0.5rem 0;
      color: #1E40AF;
      font-style: normal;
    }
    .article-content ul, .article-content ol {
      margin-bottom: 1.25rem;
      padding-left: 1.5rem;
    }
    .article-content li {
      margin-bottom: 0.5rem;
      list-style-type: disc;
    }
    .article-content table {
      width: 100%;
      border-collapse: collapse;
      margin: 1.5rem 0;
      font-size: 0.9rem;
    }
    .article-content th, .article-content td {
      border: 1px solid #E2E8F0;
      padding: 0.75rem 1rem;
      text-align: left;
    }
    .article-content th {
      background-color: #F1F5F9;
      color: #0F172A;
      font-weight: 600;
    }

/* roulang page: category1 */
:root {
      --primary: #2563EB;
      --primary-hover: #1D4ED8;
      --accent: #0284C7;
      --surface-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--surface-bg);
      color: var(--text-body);
      line-height: 1.65;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }
    .sandbox-grid {
      background-size: 24px 24px;
      background-image: radial-gradient(rgba(148, 163, 184, 0.2) 1px, transparent 1px);
    }
    .dock-shadow {
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }

/* roulang page: category2 */
:root {
      --primary: #2563EB;
      --primary-hover: #1D4ED8;
      --accent: #0284C7;
      --surface-bg: #F8FAFC;
      --card-bg: #FFFFFF;
      --text-main: #0F172A;
      --text-body: #334155;
      --text-muted: #64748B;
      --border-color: rgba(226, 232, 240, 0.85);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      background-color: var(--surface-bg);
      color: var(--text-body);
      line-height: 1.65;
      letter-spacing: -0.01em;
      -webkit-font-smoothing: antialiased;
    }
    .sandbox-grid {
      background-size: 24px 24px;
      background-image: radial-gradient(rgba(148, 163, 184, 0.2) 1px, transparent 1px);
    }
    .dock-shadow {
      box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.08), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    }
    .matrix-border {
      border: 1px solid var(--border-color);
    }