/* roulang page: index */
:root {
      --bg-main: #070B14;
      --bg-panel: #0D1527;
      --primary: #2563EB;
      --accent-cyan: #06B6D4;
      --accent-glow: #22D3EE;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --border-hud: rgba(6, 182, 212, 0.28);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    .hud-border {
      border: 1px solid var(--border-hud);
      clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
    }
    .hud-box {
      background: rgba(13, 21, 39, 0.75);
      backdrop-filter: blur(12px);
      border: 1px solid rgba(37, 99, 235, 0.25);
    }
    .hud-glow {
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
    }
    .btn-glow {
      background: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
      box-shadow: 0 0 20px rgba(37, 99, 235, 0.45);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(34, 211, 238, 0.7);
      transform: translateY(-2px);
    }
    .text-glow {
      text-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
    }

/* roulang page: article */
:root {
      --bg-main: #070B14;
      --bg-panel: #0D1527;
      --primary: #2563EB;
      --accent-cyan: #06B6D4;
      --accent-glow: #22D3EE;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --border-hud: rgba(6, 182, 212, 0.28);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    .hud-border {
      border: 1px solid var(--border-hud);
      clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
    }
    .btn-glow {
      background: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
      box-shadow: 0 0 20px rgba(37, 99, 235, 0.45);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(34, 211, 238, 0.7);
      transform: translateY(-2px);
    }
    .text-glow {
      text-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
    }
    .article-render-body {
      color: #CBD5E1;
      font-size: 1.05rem;
      line-height: 1.85;
    }
    .article-render-body p {
      margin-bottom: 1.5rem;
    }
    .article-render-body h2 {
      font-size: 1.6rem;
      font-weight: 700;
      color: #F8FAFC;
      margin-top: 2.5rem;
      margin-bottom: 1.25rem;
      padding-left: 0.85rem;
      border-left: 4px solid var(--accent-cyan);
      display: flex;
      align-items: center;
    }
    .article-render-body h3 {
      font-size: 1.3rem;
      font-weight: 600;
      color: #22D3EE;
      margin-top: 2rem;
      margin-bottom: 1rem;
      padding-left: 0.5rem;
      border-left: 2px solid #3B82F6;
    }
    .article-render-body ul, .article-render-body ol {
      margin-bottom: 1.5rem;
      padding-left: 1.5rem;
    }
    .article-render-body li {
      margin-bottom: 0.5rem;
      list-style-type: square;
    }
    .article-render-body blockquote {
      border-left: 4px solid #2563EB;
      background: rgba(13, 21, 39, 0.75);
      padding: 1.2rem 1.5rem;
      margin: 1.75rem 0;
      color: #94A3B8;
      font-style: italic;
      border-radius: 0 4px 4px 0;
    }
    .article-render-body img {
      border-radius: 4px;
      margin: 2rem auto;
      border: 1px solid rgba(6, 182, 212, 0.3);
    }
    .article-render-body table {
      width: 100%;
      border-collapse: collapse;
      margin: 2rem 0;
      font-size: 0.95rem;
    }
    .article-render-body th, .article-render-body td {
      border: 1px solid rgba(148, 163, 184, 0.2);
      padding: 0.75rem 1rem;
      text-align: left;
    }
    .article-render-body th {
      background: rgba(30, 41, 59, 0.8);
      color: #22D3EE;
    }

/* roulang page: category1 */
:root {
      --bg-main: #070B14;
      --bg-panel: #0D1527;
      --primary: #2563EB;
      --accent-cyan: #06B6D4;
      --accent-glow: #22D3EE;
      --text-main: #F8FAFC;
      --text-muted: #94A3B8;
      --border-hud: rgba(6, 182, 212, 0.28);
    }
    body {
      background-color: var(--bg-main);
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }
    .hud-border {
      border: 1px solid var(--border-hud);
      clip-path: polygon(0 0, calc(100% - 12px) 0, 100% 12px, 100% 100%, 12px 100%, 0 calc(100% - 12px));
    }
    .hud-card {
      background-color: rgba(13, 21, 39, 0.7);
      border: 1px solid rgba(6, 182, 212, 0.2);
      backdrop-filter: blur(12px);
      transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .hud-card:hover {
      border-color: rgba(34, 211, 238, 0.6);
      box-shadow: 0 0 25px rgba(6, 182, 212, 0.25);
      transform: translateY(-2px);
    }
    .btn-glow {
      background: linear-gradient(135deg, #2563EB 0%, #06B6D4 100%);
      box-shadow: 0 0 20px rgba(37, 99, 235, 0.45);
      transition: all 0.25s ease;
    }
    .btn-glow:hover {
      box-shadow: 0 0 30px rgba(34, 211, 238, 0.7);
      transform: translateY(-2px);
    }
    .text-glow {
      text-shadow: 0 0 12px rgba(34, 211, 238, 0.5);
    }
    .timeline-dot {
      box-shadow: 0 0 12px #06B6D4;
    }