:root {
            --primary: rgb(2,132,199);
            --primary-hover: rgb(2,100,160);
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-main: #0f172a;
            --text-sub: #475569;
            --border: #e2e8f0;
            --radius: 12px;
            --shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, sans-serif; }
        body { background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: 0.3s; }
        ul { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }

        
        .header { background: rgba(255,255,255,0.95); backdrop-filter: blur(10px); position: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border); }
        .nav-container { max-width: 1200px; margin: 0 auto; padding: 0 20px; height: 70px; display: flex; justify-content: space-between; align-items: center; }
        .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
        .logo img { display: block; height: 36px; 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(--primary); white-space: nowrap; }
        .desktop-nav { display: flex; gap: 30px; align-items: center; }
        .desktop-nav a { font-weight: 500; font-size: 16px; }
        .header-action { display: flex; gap: 15px; }
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; border-radius: 8px; font-weight: 600; cursor: pointer; }
        .btn-primary { background: var(--primary); color: #fff; }
        .mobile-toggle { display: none; font-size: 24px; cursor: pointer; }
        
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 999; opacity: 0; visibility: hidden; transition: 0.3s; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100vh; background: #fff; z-index: 1000; transition: 0.3s; display: flex; flex-direction: column; }
        .drawer.active { left: 0; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { font-size: 24px; cursor: pointer; }
        .drawer-nav { padding: 20px; flex: 1; }
        .drawer-nav a { display: block; padding: 12px 0; border-bottom: 1px solid #f1f5f9; }

        
        .container { max-width: 1200px; margin: 40px auto; padding: 0 20px; display: grid; grid-template-columns: 1fr 320px; gap: 40px; }
        
        .breadcrumb { font-size: 14px; color: var(--text-sub); margin-bottom: 20px; }
        .breadcrumb a:hover { color: var(--primary); }

        .article-main { background: var(--bg-card); padding: 40px; border-radius: var(--radius); box-shadow: var(--shadow); }
        .art-header h1 { font-size: 32px; margin-bottom: 20px; line-height: 1.4; }
        .art-meta-info { display: flex; flex-wrap: wrap; gap: 20px; color: #94a3b8; font-size: 14px; margin-bottom: 30px; padding-bottom: 20px; border-bottom: 1px solid var(--border); }
        
        .art-body { font-size: 16px; line-height: 1.8; color: var(--text-sub); }
        .art-body p { margin-bottom: 20px; }
        .art-body img { border-radius: 8px; margin: 20px 0; }
        .art-body h2 { font-size: 24px; color: var(--text-main); margin: 40px 0 20px; }

        .art-footer { margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border); }
        .art-tags { display: flex; gap: 10px; align-items: center; margin-bottom: 30px; }
        .art-tags span { font-weight: bold; }
        .art-tags a { background: var(--bg-body); padding: 6px 15px; border-radius: 20px; font-size: 14px; color: var(--primary); }
        
        .art-nav { display: flex; justify-content: space-between; gap: 20px; }
        .art-nav a { flex: 1; background: var(--bg-body); padding: 15px 20px; border-radius: 8px; font-size: 14px; transition: background 0.3s; }
        .art-nav a:hover { background: #e2e8f0; }
        .art-nav span { display: block; color: var(--text-light); margin-bottom: 5px; }
        .art-nav strong { color: var(--text-main); display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; }

        
        .sidebar { display: flex; flex-direction: column; gap: 30px; }
        .widget { background: var(--bg-card); padding: 25px; border-radius: var(--radius); box-shadow: var(--shadow); }
        .widget h3 { font-size: 18px; margin-bottom: 20px; padding-bottom: 10px; border-bottom: 2px solid var(--primary); display: inline-block; }
        
        .rel-list { display: flex; flex-direction: column; gap: 15px; }
        .rel-item { display: flex; gap: 15px; }
        .rel-img { width: 80px; height: 60px; object-fit: cover; border-radius: 6px; flex-shrink: 0; }
        .rel-text h4 { font-size: 14px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 5px; }
        .rel-text span { font-size: 12px; color: var(--text-light); }

        .dl-widget { text-align: center; background: linear-gradient(135deg, var(--primary), #0284c7); color: #fff; padding: 30px 20px; }
        .dl-widget h3 { border-color: rgba(255,255,255,0.3); margin-bottom: 10px; }
        .dl-widget p { font-size: 14px; margin-bottom: 20px; opacity: 0.9; }
        .dl-widget .btn { background: #fff; color: var(--primary); width: 100%; }

        .footer { background: #0f172a; color: #cbd5e1; padding: 80px 20px 30px; margin-top: 60px;}
        .footer-grid { max-width: 1200px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 50px; margin-bottom: 50px; }
        .footer-brand p { margin-top: 20px; max-width: 300px; line-height: 1.8; }
        .footer-title { color: #fff; font-size: 18px; margin-bottom: 20px; }
        .footer-nav li { margin-bottom: 12px; }
        .footer-bottom { max-width: 1200px; margin: 0 auto; padding-top: 30px; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; font-size: 14px; }

        @media (max-width: 992px) {
            .container { grid-template-columns: 1fr; }
            .article-main { padding: 20px; }
        }
        @media (max-width: 768px) {
            .desktop-nav, .header-action { display: none; }
            .mobile-toggle { display: block; }
            .art-nav { flex-direction: column; }
            .footer-grid { grid-template-columns: 1fr; }
        }