:root {
      --primary-color: rgb(9, 132, 227);
      --primary-glow: rgba(9, 132, 227, 0.15);
      --dark-ink: #050a18;
      --glacier-blue: #1D7BFF;
      --silver-white: #f5f7fa;
      --text-main: #2d3748;
      --text-muted: #718096;
      --border-color: #e2e8f0;
      --card-bg: #ffffff;
    }
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body {
      font-family: 'Helvetica Neue', Arial, 'PingFang SC', sans-serif;
      color: var(--text-main);
      background-color: var(--silver-white);
      line-height: 1.8;
    }
    a { text-decoration: none; color: inherit; }
    
    header {
      background: rgba(255, 255, 255, 0.95);
      border-bottom: 1px solid var(--border-color);
      position: sticky;
      top: 0;
      z-index: 100;
      backdrop-filter: blur(10px);
    }
    .header-container {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 15px 20px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 12px;
    }
    .logo img {
      display: block;
      height: 40px;
      width: auto;
      max-width: 160px;
      object-fit: contain;
    }
    .logo span {
      display: inline-block;
      font-size: 18px;
      font-weight: 800;
      color: #111;
    }
    .nav-menu { display: flex; gap: 24px; align-items: center; }
    .nav-menu a {
      font-size: 15px;
      font-weight: 500;
      color: var(--text-muted);
      transition: color 0.3s;
    }
    .nav-menu a:hover { color: var(--primary-color); }
    .menu-toggle {
      display: none;
      font-size: 24px;
      background: none;
      border: none;
      cursor: pointer;
    }

    
    .drawer-overlay {
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: rgba(0, 0, 0, 0.5);
      z-index: 998;
      display: none;
      opacity: 0;
    }
    .drawer-overlay.active { display: block; opacity: 1; }
    .drawer-nav {
      position: fixed;
      top: 0;
      left: -280px;
      width: 280px;
      height: 100%;
      background: var(--dark-ink);
      color: #fff;
      z-index: 999;
      padding: 30px 20px;
      display: flex;
      flex-direction: column;
      gap: 30px;
      transition: left 0.3s ease;
    }
    .drawer-nav.active { left: 0; }
    .drawer-header {
      display: flex;
      justify-content: space-between;
      align-items: center;
      border-bottom: 1px solid rgba(255,255,255,0.1);
      padding-bottom: 15px;
    }
    .drawer-header .logo span { color: #fff; }
    .drawer-close {
      background: none;
      border: none;
      color: #fff;
      font-size: 24px;
      cursor: pointer;
    }
    .drawer-menu-list { display: flex; flex-direction: column; gap: 20px; }
    .drawer-menu-list a { font-size: 16px; color: #cbd5e1; }

    
    .article-container {
      max-width: 1200px;
      margin: 40px auto;
      padding: 0 20px;
      display: grid;
      grid-template-columns: 3fr 1fr;
      gap: 40px;
    }

    
    .breadcrumbs {
      font-size: 14px;
      color: var(--text-muted);
      margin-bottom: 20px;
      grid-column: span 2;
    }
    .breadcrumbs a:hover { color: var(--primary-color); }

    
    .article-main-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 40px;
      box-shadow: 0 4px 6px rgba(0,0,0,0.01);
    }
    .article-head {
      border-bottom: 1px solid var(--border-color);
      padding-bottom: 24px;
      margin-bottom: 30px;
    }
    .article-title { font-size: 30px; font-weight: 800; color: #1a202c; line-height: 1.4; margin-bottom: 20px; }
    .article-meta-info {
      display: flex;
      gap: 20px;
      font-size: 14px;
      color: var(--text-muted);
      flex-wrap: wrap;
    }
    .article-meta-item { display: flex; align-items: center; gap: 6px; }

    .article-body { font-size: 16px; color: var(--text-main); margin-bottom: 40px; }
    .article-body p { margin-bottom: 24px; }
    .article-body img { border-radius: 8px; margin: 20px auto; display: block; max-width: 100%; }

    
    .article-footer-tags {
      display: flex;
      gap: 10px;
      margin-bottom: 30px;
      padding-top: 20px;
      border-top: 1px solid #edf2f7;
    }
    .article-footer-tag {
      font-size: 13px;
      background: #edf2f7;
      color: var(--text-main);
      padding: 4px 12px;
      border-radius: 50px;
    }

    .prev-next-box {
      display: flex;
      justify-content: space-between;
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      margin-top: 40px;
      font-size: 14px;
      color: var(--text-muted);
      flex-wrap: wrap;
      gap: 15px;
    }
    .prev-next-box a:hover { color: var(--primary-color); }

    
    .related-section { margin-top: 50px; }
    .related-title { font-size: 20px; font-weight: 700; color: #111; margin-bottom: 24px; }
    .related-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .related-card {
      background: #fff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      padding: 16px;
      transition: transform 0.3s;
    }
    .related-card:hover { transform: translateY(-3px); }
    .related-card-title { font-size: 14px; font-weight: 600; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

    
    .sidebar-section {
      background: var(--card-bg);
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px;
      margin-bottom: 30px;
    }
    .sidebar-title {
      font-size: 16px;
      font-weight: 700;
      color: #111;
      border-left: 4px solid var(--primary-color);
      padding-left: 10px;
      margin-bottom: 20px;
    }
    .tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
    .tag-item {
      font-size: 12px;
      background: #f1f5f9;
      color: var(--text-muted);
      padding: 6px 12px;
      border-radius: 50px;
    }

    
    footer {
      background-color: #0b1329;
      color: #94a3b8;
      padding: 60px 20px 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
    }
    .footer-grid {
      max-width: 1200px;
      margin: 0 auto;
      display: grid;
      grid-template-columns: 2fr repeat(3, 1fr);
      gap: 40px;
      margin-bottom: 40px;
    }
    .footer-logo-area .logo span { color: #fff; }
    .footer-desc { margin: 15px 0; font-size: 14px; line-height: 1.6; }
    .footer-links h4 { color: #fff; font-size: 16px; margin-bottom: 20px; }
    .footer-links ul { list-style: none; }
    .footer-links ul li { margin-bottom: 10px; }
    .footer-links ul li a { font-size: 14px; transition: color 0.3s; }
    .footer-links ul li a:hover { color: #fff; }
    .footer-bottom {
      max-width: 1200px;
      margin: 0 auto;
      padding-top: 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.05);
      display: flex;
      justify-content: space-between;
      align-items: center;
      font-size: 13px;
      flex-wrap: wrap;
      gap: 15px;
    }

    @media (max-width: 992px) {
      .article-container { grid-template-columns: 1fr; }
      .breadcrumbs { grid-column: span 1; }
      .related-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 768px) {
      .nav-menu { display: none; }
      .menu-toggle { display: block; }
      .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    }