:root {
            --primary: rgb(34,197,94);
            --primary-dark: #16a34a;
            --primary-light: #dcfce7;
            --text-main: #111827;
            --text-body: #4b5563;
            --text-muted: #9ca3af;
            --bg-body: #f9fafb;
            --bg-surface: #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);
            --radius-md: 8px;
            --radius-lg: 12px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; color: var(--text-body); background-color: var(--bg-body); line-height: 1.6; }
        a { text-decoration: none; color: inherit; transition: color 0.3s; }
        img { max-width: 100%; height: auto; display: block; }
        .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
        
        
        h1, h2, h3, h4 { color: var(--text-main); font-weight: 700; line-height: 1.3; }
        .section-title { text-align: center; font-size: 32px; margin-bottom: 15px; position: relative; padding-bottom: 15px; }
        .section-title::after { content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%); width: 60px; height: 3px; background-color: var(--primary); border-radius: 2px; }
        .section-subtitle { text-align: center; color: var(--text-muted); font-size: 16px; margin-bottom: 40px; }

        
        .btn { display: inline-flex; align-items: center; justify-content: center; padding: 10px 24px; font-size: 16px; font-weight: 500; border-radius: var(--radius-md); cursor: pointer; transition: all 0.3s; text-align: center; }
        .btn-primary { background-color: var(--primary); color: white; box-shadow: 0 4px 14px 0 rgba(34,197,94,0.39); }
        .btn-primary:hover { background-color: var(--primary-dark); transform: translateY(-1px); }
        .btn-outline { border: 1px solid var(--border-color); color: var(--text-main); background: var(--bg-surface); }
        .btn-outline:hover { border-color: var(--primary); color: var(--primary); }

        
        .logo { display: inline-flex; align-items: center; gap: 12px; text-decoration: none; }
        .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(--text-main); white-space: nowrap; }

        
        .site-header { background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(8px); position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid var(--border-color); }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
        .desktop-nav { display: flex; gap: 30px; }
        .desktop-nav a { font-weight: 500; color: var(--text-main); position: relative; }
        .desktop-nav a:hover { color: var(--primary); }
        .header-actions { display: flex; align-items: center; gap: 15px; }
        .mobile-menu-btn { display: none; background: none; border: none; cursor: pointer; color: var(--text-main); }
        
        
        .drawer-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); opacity: 0; visibility: hidden; transition: 0.3s; z-index: 1001; }
        .drawer { position: fixed; top: 0; left: -300px; width: 280px; height: 100%; background: var(--bg-surface); box-shadow: var(--shadow-lg); transition: 0.3s; z-index: 1002; display: flex; flex-direction: column; }
        .drawer.active { left: 0; }
        .drawer-overlay.active { opacity: 1; visibility: visible; }
        .drawer-header { padding: 20px; border-bottom: 1px solid var(--border-color); display: flex; justify-content: space-between; align-items: center; }
        .drawer-close { background: none; border: none; font-size: 24px; cursor: pointer; color: var(--text-muted); }
        .drawer-nav { padding: 20px; display: flex; flex-direction: column; gap: 15px; overflow-y: auto; flex: 1; }
        .drawer-nav a { display: block; padding: 10px; font-weight: 500; border-radius: var(--radius-md); background: var(--bg-body); }
        .drawer-nav a:hover { background: var(--primary-light); color: var(--primary-dark); }

        
        .hero { padding: 80px 0; background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%); overflow: hidden; position: relative; }
        .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
        .hero-content h1 { font-size: 46px; margin-bottom: 20px; line-height: 1.2; }
        .hero-content p { font-size: 18px; margin-bottom: 30px; color: var(--text-body); }
        .hero-tags { display: flex; gap: 10px; margin-bottom: 30px; flex-wrap: wrap; }
        .hero-tag { background: white; padding: 6px 12px; border-radius: 20px; font-size: 14px; color: var(--primary-dark); box-shadow: var(--shadow-sm); display: inline-flex; align-items: center; gap: 5px; }
        .hero-visual { position: relative; }
        .hero-visual img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); border: 4px solid white; transform: perspective(1000px) rotateY(-5deg); transition: transform 0.5s; }
        .hero-visual:hover img { transform: perspective(1000px) rotateY(0deg); }
        
        
        .features { padding: 80px 0; background: var(--bg-surface); }
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-card { padding: 40px 30px; border-radius: var(--radius-lg); background: var(--bg-body); text-align: center; transition: all 0.3s; border: 1px solid transparent; }
        .feature-card:hover { transform: translateY(-5px); background: white; box-shadow: var(--shadow-md); border-color: var(--primary-light); }
        .feature-icon { width: 64px; height: 64px; background: var(--primary-light); color: var(--primary); border-radius: 16px; display: inline-flex; align-items: center; justify-content: center; margin-bottom: 20px; font-size: 32px; font-weight: bold; }
        .feature-card h3 { font-size: 20px; margin-bottom: 15px; }
        .feature-card p { color: var(--text-muted); font-size: 15px; }

        
        .mechanism { padding: 80px 0; }
        .mech-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; }
        .mech-img { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
        .mech-list { display: flex; flex-direction: column; gap: 20px; }
        .mech-item { display: flex; gap: 20px; background: var(--bg-surface); padding: 20px; border-radius: var(--radius-md); box-shadow: var(--shadow-sm); }
        .mech-num { font-size: 24px; font-weight: 900; color: var(--primary-light); -webkit-text-stroke: 1px var(--primary); line-height: 1; }
        
        
        .news { padding: 80px 0; background: var(--bg-surface); }
        .article-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .article-card { background: var(--bg-surface); border-radius: var(--radius-md); overflow: hidden; box-shadow: var(--shadow-sm); transition: 0.3s; border: 1px solid var(--border-color); display: flex; flex-direction: column; }
        .article-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
        .article-img { width: 100%; aspect-ratio: 16/10; object-fit: cover; background: #eee; }
        .article-content { padding: 20px; display: flex; flex-direction: column; flex: 1; }
        .article-tags { margin-bottom: 10px; }
        .article-tags a { font-size: 12px; background: var(--bg-body); color: var(--text-body); padding: 2px 8px; border-radius: 4px; display: inline-block; }
        .article-title { font-size: 16px; margin-bottom: 10px; 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: var(--text-muted); border-top: 1px solid var(--bg-body); padding-top: 10px; }

        
        .cta { padding: 80px 0; text-align: center; background: var(--text-main); color: white; }
        .cta h2 { color: white; margin-bottom: 20px; }
        .cta p { color: #d1d5db; margin-bottom: 30px; font-size: 18px; max-width: 600px; margin-left: auto; margin-right: auto; }

        
        .site-footer { background: #111827; color: #9ca3af; padding: 60px 0 20px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-logo span { color: white; }
        .footer-desc { margin-top: 15px; font-size: 14px; line-height: 1.8; }
        .footer-links h3 { color: white; font-size: 16px; margin-bottom: 20px; }
        .footer-links ul { list-style: none; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a:hover { color: var(--primary); }
        .footer-bottom { border-top: 1px solid #374151; padding-top: 20px; text-align: center; font-size: 14px; }

        
        @media (max-width: 992px) {
            .hero-inner, .mech-grid { grid-template-columns: 1fr; }
            .hero-content { text-align: center; }
            .hero-tags { justify-content: center; }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .article-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 768px) {
            .desktop-nav, .header-actions .btn { display: none; }
            .mobile-menu-btn { display: block; }
            .hero h1 { font-size: 32px; }
            .feature-grid { grid-template-columns: 1fr; }
            .article-grid { grid-template-columns: 1fr; }
            .footer-grid { grid-template-columns: 1fr; }
        }