:root {
            --primary: rgb(209,213,219);
            --primary-dark: #9ca3af;
            --text-main: #1f2937;
            --text-muted: #6b7280;
            --bg-body: #f9fafb;
            --bg-white: #ffffff;
            --accent: #111827;
            --border-color: #e5e7eb;
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background-color: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; }
        ul, li { list-style: none; }
        img { max-width: 100%; height: auto; display: block; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        header { background-color: var(--bg-white); border-bottom: 1px solid var(--border-color); position: sticky; top: 0; z-index: 100; }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .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(--accent); white-space: nowrap; }
        .nav-desktop { display: flex; gap: 30px; align-items: center; }
        .nav-desktop a { font-size: 16px; font-weight: 500; color: var(--text-main); transition: color 0.3s; }
        .nav-desktop a:hover { color: var(--primary-dark); }
        .mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; }
        .mobile-menu-btn svg { width: 28px; height: 28px; fill: var(--text-main); }
        
        
        .mobile-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); opacity: 0; visibility: hidden; transition: 0.3s; z-index: 998; }
        .mobile-overlay.active { opacity: 1; visibility: visible; }
        .mobile-drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100vh; background: var(--bg-white); z-index: 999; transition: left 0.3s ease; display: flex; flex-direction: column; box-shadow: 2px 0 8px rgba(0,0,0,0.1); }
        .mobile-drawer.active { left: 0; }
        .drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 20px; border-bottom: 1px solid var(--border-color); }
        .drawer-close { background: none; border: none; cursor: pointer; }
        .drawer-close svg { width: 24px; height: 24px; fill: var(--text-muted); }
        .drawer-nav { padding: 20px; overflow-y: auto; display: flex; flex-direction: column; gap: 15px; }
        .drawer-nav a { display: block; font-size: 16px; font-weight: 500; color: var(--text-main); padding: 10px 0; border-bottom: 1px solid var(--bg-body); }
        
        
        footer { background-color: var(--accent); color: var(--primary); padding: 60px 0 30px; margin-top: 60px; }
        .footer-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo span { color: var(--bg-white); }
        .footer-desc { margin-top: 15px; font-size: 14px; color: var(--primary-dark); }
        .footer-title { font-size: 18px; color: var(--bg-white); font-weight: 600; margin-bottom: 20px; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { color: var(--primary); transition: color 0.3s; font-size: 14px; }
        .footer-links a:hover { color: var(--bg-white); }
        .footer-bottom { text-align: center; padding-top: 20px; border-top: 1px solid rgba(255,255,255,0.1); font-size: 14px; color: var(--primary-dark); }
        
        
        .hero { background: linear-gradient(135deg, var(--bg-body) 0%, var(--primary) 100%); padding: 80px 0; overflow: hidden; }
        .hero-inner { display: flex; align-items: center; gap: 60px; }
        .hero-content { flex: 1; }
        .hero-tag { display: inline-block; padding: 6px 16px; background: rgba(17, 24, 39, 0.05); border-radius: 20px; font-size: 14px; font-weight: 600; margin-bottom: 20px; color: var(--accent); border: 1px solid rgba(17, 24, 39, 0.1); }
        .hero h1 { font-size: 48px; font-weight: 800; line-height: 1.2; margin-bottom: 24px; color: var(--accent); }
        .hero p { font-size: 18px; color: var(--text-main); margin-bottom: 32px; opacity: 0.9; }
        .hero-actions { display: flex; gap: 16px; }
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 14px 28px; font-size: 16px; font-weight: 600; border-radius: 8px; transition: all 0.3s; cursor: pointer; text-align: center; }
        .btn-primary { background: var(--accent); color: var(--bg-white); border: 2px solid var(--accent); box-shadow: 0 4px 6px rgba(0,0,0,0.1); }
        .btn-primary:hover { background: transparent; color: var(--accent); }
        .btn-outline { background: transparent; color: var(--accent); border: 2px solid var(--accent); }
        .btn-outline:hover { background: var(--accent); color: var(--bg-white); }
        .hero-visual { flex: 1; position: relative; }
        .hero-visual img { border-radius: 16px; box-shadow: 0 20px 40px rgba(0,0,0,0.15); }
        
        
        .section { padding: 80px 0; }
        .section-header { text-align: center; margin-bottom: 50px; }
        .section-title { font-size: 32px; font-weight: 700; color: var(--accent); margin-bottom: 16px; }
        .section-desc { font-size: 16px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-card { background: var(--bg-white); padding: 40px 30px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.03); transition: transform 0.3s; border: 1px solid var(--border-color); }
        .feature-card:hover { transform: translateY(-5px); border-color: var(--primary-dark); }
        .feature-icon { width: 56px; height: 56px; background: var(--primary); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 24px; font-size: 24px; font-weight: bold; color: var(--accent); }
        .feature-card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--accent); }
        .feature-card p { font-size: 15px; color: var(--text-muted); }
        
        
        .article-layer { background: var(--bg-white); }
        .article-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .article-card { background: var(--bg-body); border-radius: 12px; overflow: hidden; border: 1px solid var(--border-color); transition: all 0.3s; display: flex; flex-direction: column; }
        .article-card:hover { box-shadow: 0 10px 25px rgba(0,0,0,0.05); }
        .article-img { width: 100%; height: 180px; object-fit: cover; }
        .article-content { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .article-tags { font-size: 12px; color: var(--primary-dark); margin-bottom: 10px; font-weight: 600; text-transform: uppercase; }
        .article-title { font-size: 18px; font-weight: 600; line-height: 1.4; margin-bottom: 10px; color: var(--accent); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .article-summary { font-size: 14px; color: var(--text-muted); margin-bottom: 15px; flex: 1; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
        .article-meta { display: flex; justify-content: space-between; font-size: 12px; color: var(--text-muted); padding-top: 15px; border-top: 1px solid var(--border-color); }
        
        
        .cta-section { background: var(--accent); padding: 80px 0; text-align: center; }
        .cta-inner { max-width: 800px; margin: 0 auto; }
        .cta-title { font-size: 36px; color: var(--bg-white); font-weight: 700; margin-bottom: 20px; }
        .cta-desc { font-size: 18px; color: var(--primary); margin-bottom: 40px; }
        .cta-btn { background: var(--bg-white); color: var(--accent); border: 2px solid var(--bg-white); }
        .cta-btn:hover { background: transparent; color: var(--bg-white); }
        
        @media (max-width: 992px) {
            .nav-desktop { display: none; }
            .mobile-menu-btn { display: block; }
            .hero-inner { flex-direction: column; }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .article-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr; gap: 30px; }
            .hero h1 { font-size: 36px; }
        }
        @media (max-width: 600px) {
            .feature-grid { grid-template-columns: 1fr; }
            .article-grid { grid-template-columns: 1fr; }
            .hero-actions { flex-direction: column; }
        }