:root {
            --primary: rgb(139,92,246);
            --primary-dark: rgb(109, 40, 217);
            --primary-light: rgba(139,92,246, 0.1);
            --text-main: #111827;
            --text-muted: #6b7280;
            --bg-body: #f9fafb;
            --bg-white: #ffffff;
            --border-color: #e5e7eb;
            --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);
        }
        * { margin: 0; padding: 0; box-sizing: border-box; }
        body { font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif; background: var(--bg-body); color: var(--text-main); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: all 0.3s ease; }
        img { max-width: 100%; height: auto; display: block; }
        ul { list-style: none; }
        .container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        .header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); position: fixed; top: 0; width: 100%; z-index: 100; border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-sm); }
        .header-inner { display: flex; justify-content: space-between; align-items: center; height: 70px; }
        .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
        .logo img { display: block; height: 36px; width: auto; max-width: 150px; object-fit: contain; flex-shrink: 0; }
        .logo span { display: inline-block; font-size: 20px; font-weight: 800; line-height: 1; color: var(--primary-dark); white-space: nowrap; letter-spacing: 0.5px;}
        
        
        .desktop-nav { display: none; }
        @media (min-width: 992px) {
            .desktop-nav { display: flex; align-items: center; gap: 30px; }
            .desktop-nav ul { display: flex; gap: 24px; }
            .desktop-nav a { font-weight: 500; color: var(--text-main); font-size: 16px; }
            .desktop-nav a:hover { color: var(--primary); }
            .btn-primary { background: var(--primary); color: white !important; padding: 8px 20px; border-radius: 6px; font-weight: 600; box-shadow: 0 4px 14px 0 rgba(139,92,246,0.39); }
            .btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); }
        }
        
        
        .mobile-menu-btn { display: block; width: 24px; height: 24px; cursor: pointer; }
        .mobile-menu-btn span { display: block; width: 100%; height: 2px; background: var(--text-main); margin-bottom: 5px; transition: 0.3s; }
        @media (min-width: 992px) { .mobile-menu-btn { display: none; } }

        
        .drawer-overlay { position: fixed; top: 0; left: 0; width: 100%; height: 100%; background: rgba(0,0,0,0.5); z-index: 1000; opacity: 0; visibility: hidden; transition: 0.3s; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer { position: fixed; top: 0; left: -280px; width: 280px; height: 100%; background: var(--bg-white); z-index: 1001; transition: 0.3s; display: flex; flex-direction: column; box-shadow: var(--shadow-lg); }
        .drawer.active { left: 0; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { font-size: 24px; color: var(--text-muted); cursor: pointer; }
        .drawer-nav { padding: 20px; overflow-y: auto; flex: 1; }
        .drawer-nav li { margin-bottom: 15px; }
        .drawer-nav a { display: block; font-size: 16px; font-weight: 500; padding: 10px; border-radius: 6px; }
        .drawer-nav a:hover { background: var(--primary-light); color: var(--primary); }

        
        .hero { padding: 140px 0 80px; background: linear-gradient(135deg, rgba(139,92,246,0.05) 0%, rgba(255,255,255,1) 100%); overflow: hidden; position: relative; }
        .hero::before { content: ''; position: absolute; top: -50%; right: -10%; width: 600px; height: 600px; background: radial-gradient(circle, rgba(139,92,246,0.15) 0%, transparent 70%); border-radius: 50%; z-index: 0; }
        .hero-inner { display: grid; grid-template-columns: 1fr; gap: 40px; position: relative; z-index: 1; }
        .hero-content h1 { font-size: 42px; font-weight: 800; line-height: 1.2; margin-bottom: 20px; color: var(--text-main); }
        .hero-content h1 span { color: var(--primary); }
        .hero-content p { font-size: 18px; color: var(--text-muted); margin-bottom: 30px; max-width: 500px; }
        .hero-actions { display: flex; gap: 15px; flex-wrap: wrap; }
        .btn-large { padding: 12px 28px; font-size: 16px; border-radius: 8px; font-weight: 600; display: inline-flex; align-items: center; justify-content: center; }
        .btn-outline { border: 2px solid var(--primary); color: var(--primary); }
        .btn-outline:hover { background: var(--primary-light); }
        .hero-visual { position: relative; display: none; }
        .hero-visual img { border-radius: 16px; box-shadow: var(--shadow-lg); width: 100%; object-fit: cover; aspect-ratio: 4/3; }
        .hero-data-card { position: absolute; bottom: -20px; left: -20px; background: var(--bg-white); padding: 15px 20px; border-radius: 12px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 12px; }
        .hero-data-card .icon { width: 40px; height: 40px; background: var(--primary-light); color: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: bold; font-size: 20px; }
        @media (min-width: 992px) {
            .hero-inner { grid-template-columns: 1fr 1fr; align-items: center; }
            .hero-visual { display: block; }
            .hero-content h1 { font-size: 52px; }
        }

        
        .stats { background: var(--bg-white); padding: 40px 0; border-bottom: 1px solid var(--border-color); }
        .stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; text-align: center; }
        .stat-item h4 { font-size: 28px; color: var(--primary); font-weight: 800; margin-bottom: 5px; }
        .stat-item p { font-size: 14px; color: var(--text-muted); }
        @media (min-width: 768px) { .stats-grid { grid-template-columns: repeat(4, 1fr); } }

        
        .section { padding: 80px 0; }
        .section-header { text-align: center; margin-bottom: 50px; }
        .section-header h2 { font-size: 32px; font-weight: 700; margin-bottom: 15px; color: var(--text-main); }
        .section-header p { font-size: 16px; color: var(--text-muted); max-width: 600px; margin: 0 auto; }

        
        .features-grid { display: grid; grid-template-columns: 1fr; gap: 30px; }
        .feature-card { background: var(--bg-white); padding: 30px; border-radius: 16px; box-shadow: var(--shadow-sm); transition: 0.3s; border: 1px solid transparent; }
        .feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .feature-icon { width: 60px; height: 60px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); border-radius: 12px; margin-bottom: 20px; display: flex; align-items: center; justify-content: center; color: white; font-size: 24px; font-weight: bold; }
        .feature-card h3 { font-size: 20px; margin-bottom: 12px; }
        .feature-card p { color: var(--text-muted); font-size: 14px; }
        @media (min-width: 768px) { .features-grid { grid-template-columns: repeat(3, 1fr); } }

        
        .articles { background: var(--bg-white); }
        .article-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
        .article-card { border: 1px solid var(--border-color); border-radius: 12px; overflow: hidden; transition: 0.3s; display: flex; flex-direction: column; }
        .article-card:hover { box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .article-img { width: 100%; aspect-ratio: 16/9; overflow: hidden; background: #eee; }
        .article-img img { width: 100%; height: 100%; object-fit: cover; transition: 0.5s; }
        .article-card:hover .article-img img { transform: scale(1.05); }
        .article-content { padding: 20px; display: flex; flex-direction: column; flex: 1; }
        .article-tags { margin-bottom: 10px; display: flex; gap: 8px; flex-wrap: wrap; }
        .article-tags span { background: var(--primary-light); color: var(--primary-dark); font-size: 12px; padding: 2px 8px; border-radius: 4px; }
        .article-title { font-size: 18px; font-weight: 600; margin-bottom: 10px; line-height: 1.4; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .article-title a:hover { color: var(--primary); }
        .article-desc { font-size: 14px; color: var(--text-muted); margin-bottom: 15px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
        .article-meta { display: flex; justify-content: space-between; font-size: 12px; color: #9ca3af; border-top: 1px solid var(--border-color); padding-top: 15px; mt-auto; }
        @media (min-width: 768px) { .article-grid { grid-template-columns: repeat(2, 1fr); } }
        @media (min-width: 1024px) { .article-grid { grid-template-columns: repeat(4, 1fr); } }

        
        .cta { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); padding: 80px 0; text-align: center; color: white; position: relative; overflow: hidden; }
        .cta::after { content: ''; position: absolute; width: 100%; height: 100%; top: 0; left: 0; background: url('data:image/svg+xml;utf8,<svg width="100" height="100" xmlns="http://www.w3.org/2000/svg"><circle cx="50" cy="50" r="40" stroke="rgba(255,255,255,0.1)" stroke-width="2" fill="none"/></svg>') repeat; opacity: 0.5; }
        .cta-inner { position: relative; z-index: 1; max-width: 700px; margin: 0 auto; }
        .cta h2 { font-size: 36px; font-weight: 800; margin-bottom: 20px; }
        .cta p { font-size: 18px; margin-bottom: 30px; opacity: 0.9; }
        .cta .btn-white { background: white; color: var(--primary); padding: 14px 32px; font-size: 18px; border-radius: 8px; font-weight: bold; display: inline-block; }
        .cta .btn-white:hover { box-shadow: 0 10px 20px rgba(0,0,0,0.2); transform: translateY(-2px); }

        
        .footer { background: #111827; color: #9ca3af; padding: 60px 0 30px; }
        .footer-grid { display: grid; grid-template-columns: 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo span { color: white; }
        .footer-brand p { margin-top: 15px; font-size: 14px; max-width: 300px; }
        .footer-links h4 { color: white; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
        .footer-links ul { display: flex; flex-direction: column; gap: 10px; }
        .footer-links a:hover { color: var(--primary); padding-left: 5px; }
        .footer-bottom { border-top: 1px solid #374151; padding-top: 30px; display: flex; flex-direction: column; align-items: center; gap: 15px; font-size: 14px; }
        .footer-utils { display: flex; gap: 15px; }
        .footer-utils a:hover { color: white; }
        @media (min-width: 768px) {
            .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
            .footer-bottom { flex-direction: row; justify-content: space-between; }
        }