:root {
      --primary: rgb(14,165,233);
      --primary-hover: #0284c7;
      --ink-dark: #0f172a;
      --ink-medium: #1e293b;
      --ink-light: #334155;
      --glacier-light: #f0f9ff;
      --glacier-border: #e0f2fe;
      --silver-white: #f8fafc;
      --pure-white: #ffffff;
      --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
      --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
      --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
      --font-sans: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    }

    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: var(--font-sans); background-color: var(--silver-white); color: var(--ink-dark); line-height: 1.7; }
    a { color: inherit; text-decoration: none; transition: all 0.3s ease; }

    header { background-color: var(--ink-dark); border-bottom: 1px solid rgba(255, 255, 255, 0.1); position: sticky; top: 0; z-index: 100; backdrop-filter: blur(8px); }
    .nav-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; height: 72px; display: flex; align-items: center; justify-content: space-between; }
    .logo { display: inline-flex; align-items: center; gap: 12px; }
    .logo img { display: block; height: 40px; width: auto; max-width: 160px; object-fit: contain; flex-shrink: 0; }
    .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--pure-white); white-space: nowrap; }
    .desktop-nav { display: flex; align-items: center; gap: 32px; }
    .desktop-nav a { color: #94a3b8; font-weight: 500; font-size: 15px; }
    .desktop-nav a:hover { color: var(--primary); }
    .nav-actions { display: flex; align-items: center; gap: 16px; }
    .btn-download-nav { background-color: var(--primary); color: var(--pure-white); padding: 8px 18px; border-radius: 9999px; font-size: 14px; font-weight: 600; }
    .btn-download-nav:hover { background-color: var(--primary-hover); }
    .menu-toggle { display: none; background: none; border: none; color: var(--pure-white); font-size: 24px; cursor: pointer; }

    
    .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(15, 23, 42, 0.6); backdrop-filter: blur(4px); z-index: 1000; opacity: 0; visibility: hidden; transition: all 0.3s ease; }
    .drawer-overlay.active { opacity: 1; visibility: visible; }
    .drawer { position: fixed; top: 0; left: 0; width: 300px; height: 100%; background-color: var(--ink-dark); z-index: 1001; transform: translateX(-100%); transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1); display: flex; flex-direction: column; }

    
    .article-layout {
      max-width: 1200px;
      margin: 40px auto;
      padding: 0 20px;
      display: grid;
      grid-template-columns: 2.5fr 1fr;
      gap: 40px;
    }

    .article-body {
      background: var(--pure-white);
      border: 1px solid var(--glacier-border);
      border-radius: 12px;
      padding: 40px;
      box-shadow: var(--shadow-sm);
    }

    .breadcrumbs {
      font-size: 13px;
      color: var(--ink-light);
      margin-bottom: 24px;
    }
    .breadcrumbs a { color: var(--primary); }

    .article-header {
      border-bottom: 1px solid #f1f5f9;
      padding-bottom: 24px;
      margin-bottom: 30px;
    }

    .article-title {
      font-size: 32px;
      font-weight: 800;
      color: var(--ink-dark);
      line-height: 1.3;
      margin-bottom: 16px;
    }

    .article-meta-info {
      display: flex;
      flex-wrap: wrap;
      gap: 20px;
      font-size: 13px;
      color: var(--ink-light);
    }

    .article-meta-info span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    
    .article-rich-text {
      font-size: 16px;
      color: #1e293b;
      margin-bottom: 40px;
    }

    .article-rich-text p {
      margin-bottom: 24px;
    }

    .article-rich-text h2 {
      font-size: 22px;
      font-weight: 800;
      margin: 40px 0 20px;
      color: var(--ink-dark);
      border-left: 4px solid var(--primary);
      padding-left: 12px;
    }

    .article-rich-text img {
      max-width: 100%;
      height: auto;
      border-radius: 8px;
      margin: 24px 0;
      display: block;
    }

    
    .article-detail-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      border-top: 1px solid #f1f5f9;
      padding-top: 24px;
      margin-bottom: 40px;
    }

    .article-detail-tags a {
      background: var(--glacier-light);
      color: var(--primary);
      padding: 6px 14px;
      border-radius: 6px;
      font-size: 13px;
      font-weight: 500;
    }

    
    .post-nav {
      border-top: 1px solid #e2e8f0;
      padding-top: 24px;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }

    .post-nav-item {
      display: flex;
      flex-direction: column;
    }

    .post-nav-label {
      font-size: 12px;
      color: var(--ink-light);
      text-transform: uppercase;
      margin-bottom: 6px;
    }

    .post-nav-link {
      font-size: 14px;
      font-weight: 700;
      color: var(--ink-dark);
    }
    .post-nav-link:hover { color: var(--primary); }

    
    .related-posts {
      margin-top: 60px;
    }
    .related-title {
      font-size: 20px;
      font-weight: 800;
      margin-bottom: 24px;
      color: var(--ink-dark);
    }
    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .related-card {
      background: var(--silver-white);
      border-radius: 8px;
      padding: 16px;
      border: 1px solid #e2e8f0;
    }
    .related-card h4 {
      font-size: 14px;
      font-weight: 700;
      line-height: 1.4;
    }
    .related-card h4 a:hover { color: var(--primary); }

    
    .sidebar { display: flex; flex-direction: column; gap: 30px; }
    .widget { background: var(--pure-white); border: 1px solid var(--glacier-border); border-radius: 12px; padding: 24px; }
    .widget-title { font-size: 16px; font-weight: 700; border-left: 4px solid var(--primary); padding-left: 12px; margin-bottom: 18px; }

    
    footer { background-color: #090d16; color: #94a3b8; font-size: 14px; border-top: 1px solid rgba(255, 255, 255, 0.05); }
    .footer-top { max-width: 1200px; margin: 0 auto; padding: 60px 20px; display: grid; grid-template-columns: 1.5fr repeat(3, 1fr); gap: 40px; }
    .footer-brand p { margin-top: 16px; line-height: 1.6; font-size: 13px; }
    .footer-title { color: var(--pure-white); font-size: 15px; font-weight: 700; margin-bottom: 20px; }
    .footer-links { list-style: none; }
    .footer-links li { margin-bottom: 12px; }
    .footer-links a { color: #94a3b8; }
    .footer-links a:hover { color: var(--primary); }
    .footer-bottom { max-width: 1200px; margin: 0 auto; padding: 30px 20px; border-top: 1px solid rgba(255, 255, 255, 0.05); display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 12px; }

    @media (max-width: 1024px) {
      .article-layout { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .desktop-nav, .nav-actions { display: none; }
      .menu-toggle { display: block; }
      .article-body { padding: 20px; }
      .article-title { font-size: 24px; }
      .post-nav { grid-template-columns: 1fr; gap: 16px; }
      .related-grid { grid-template-columns: 1fr; }
      .footer-top { grid-template-columns: 1fr; gap: 30px; }
    }