:root {
            --primary: rgb(90,200,250);
            --primary-dark: rgb(60, 180, 230);
            --bg-body: #f4f7fa;
            --bg-surface: #ffffff;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --border-color: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1);
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif; background-color: 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%; 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: sticky; top: 0; z-index: 100; border-bottom: 1px solid var(--border-color); box-shadow: var(--shadow-sm); }
        .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: 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; letter-spacing: 1px;}
        
        .nav-desktop { display: flex; gap: 30px; align-items: center; }
        .nav-desktop a { font-weight: 500; font-size: 15px; color: var(--text-main); position: relative; }
        .nav-desktop a:hover { color: var(--primary); }
        .nav-desktop a::after { content: ''; position: absolute; bottom: -5px; left: 0; width: 0; height: 2px; background: var(--primary); transition: width 0.3s; }
        .nav-desktop a:hover::after { width: 100%; }
        
        .header-actions { display: flex; align-items: center; gap: 15px; }
        .btn { display: inline-block; padding: 10px 24px; border-radius: 6px; font-weight: 600; text-align: center; cursor: pointer; transition: all 0.3s; }
        .btn-primary { background-color: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(90,200,250,0.3); }
        .btn-primary:hover { background-color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 15px rgba(90,200,250,0.4); }
        .btn-outline { border: 1px solid var(--primary); color: var(--primary); }
        .btn-outline:hover { background: rgba(90,200,250,0.1); }
        
        .mobile-menu-btn { display: none; font-size: 24px; cursor: pointer; color: var(--text-main); }
        
        
        .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: 100%; background: #fff; z-index: 1000; transition: left 0.3s ease; 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; cursor: pointer; color: var(--text-muted); }
        .drawer-body { padding: 20px; overflow-y: auto; flex: 1; }
        .drawer-nav a { display: block; padding: 12px 0; border-bottom: 1px solid #f1f5f9; font-size: 16px; font-weight: 500; }
        .drawer-nav a:hover { color: var(--primary); padding-left: 10px; }
        
        
        .hero { padding: 80px 0; background: linear-gradient(135deg, #fff 0%, #e0f2fe 100%); position: relative; overflow: hidden; }
        .hero::before { content: ''; position: absolute; width: 600px; height: 600px; background: radial-gradient(circle, rgba(90,200,250,0.15) 0%, rgba(255,255,255,0) 70%); top: -100px; right: -100px; border-radius: 50%; }
        .hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 50px; align-items: center; position: relative; z-index: 2; }
        .hero-text h1 { font-size: 48px; line-height: 1.2; margin-bottom: 20px; color: #0f172a; font-weight: 800; }
        .hero-text h1 span { color: var(--primary); }
        .hero-text p { font-size: 18px; color: var(--text-muted); margin-bottom: 30px; max-width: 90%; }
        .hero-tags { display: flex; gap: 15px; margin-bottom: 30px; }
        .hero-tag { background: rgba(90,200,250,0.1); color: var(--primary-dark); padding: 5px 12px; border-radius: 20px; font-size: 14px; font-weight: 600; }
        .hero-visual { position: relative; }
        .hero-img-box { background: #fff; border-radius: 16px; padding: 20px; box-shadow: var(--shadow-lg); border: 1px solid var(--border-color); }
        .hero-img-box img { border-radius: 8px; width: 100%; height: auto; }
        .floating-card { position: absolute; bottom: -20px; left: -20px; background: #fff; padding: 15px 20px; border-radius: 12px; box-shadow: var(--shadow-md); display: flex; align-items: center; gap: 15px; animation: float 3s ease-in-out infinite; }
        .fc-icon { width: 40px; height: 40px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; font-weight: bold; }
        .fc-text h4 { font-size: 14px; margin-bottom: 4px; }
        .fc-text p { font-size: 12px; color: var(--text-muted); margin: 0; }
        @keyframes float { 0% { transform: translateY(0px); } 50% { transform: translateY(-10px); } 100% { transform: translateY(0px); } }

        
        .data-bar { background: #fff; border-bottom: 1px solid var(--border-color); padding: 30px 0; }
        .data-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; text-align: center; }
        .data-item h3 { font-size: 32px; color: var(--primary); font-weight: 800; margin-bottom: 5px; }
        .data-item p { font-size: 14px; color: var(--text-muted); }

        
        .section { padding: 80px 0; }
        .section-header { text-align: center; margin-bottom: 50px; }
        .section-header h2 { font-size: 32px; font-weight: 700; margin-bottom: 15px; position: relative; display: inline-block; }
        .section-header h2::after { content: ''; position: absolute; bottom: -10px; left: 50%; transform: translateX(-50%); width: 40px; height: 3px; background: var(--primary); border-radius: 2px; }
        .section-header p { color: var(--text-muted); font-size: 16px; }
        
        .feature-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }
        .feature-card { background: #fff; padding: 40px 30px; border-radius: 16px; box-shadow: var(--shadow-sm); transition: all 0.3s; border: 1px solid transparent; }
        .feature-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: rgba(90,200,250,0.3); }
        .icon-wrapper { width: 60px; height: 60px; border-radius: 14px; background: rgba(90,200,250,0.1); display: flex; align-items: center; justify-content: center; margin-bottom: 20px; color: var(--primary); font-size: 28px; font-weight: bold; }
        .feature-card h3 { font-size: 20px; margin-bottom: 15px; }
        .feature-card p { color: var(--text-muted); font-size: 14px; line-height: 1.7; }

        
        .article-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
        .article-card { background: #fff; border-radius: 12px; overflow: hidden; box-shadow: var(--shadow-sm); transition: 0.3s; border: 1px solid var(--border-color); display: flex; flex-direction: column; }
        .article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .article-img { width: 100%; height: 160px; overflow: hidden; background: #e2e8f0; position: relative; }
        .article-img img { width: 100%; height: 100%; object-fit: cover; transition: 0.5s; }
        .article-card:hover .article-img img { transform: scale(1.05); }
        .article-tag-abs { position: absolute; top: 10px; right: 10px; background: rgba(0,0,0,0.6); color: #fff; padding: 2px 8px; border-radius: 4px; font-size: 12px; }
        .article-content { padding: 20px; flex: 1; display: flex; flex-direction: column; }
        .article-title { font-size: 16px; font-weight: 600; margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; height: 44px; line-height: 1.4; }
        .article-title a:hover { color: var(--primary); }
        .article-desc { font-size: 13px; 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; align-items: center; border-top: 1px solid #f1f5f9; padding-top: 12px; font-size: 12px; color: #94a3b8; }
        
        
        .cta-section { background: var(--text-main); color: #fff; padding: 70px 0; text-align: center; border-radius: 20px; margin: 40px auto; max-width: 1200px; position: relative; overflow: hidden; }
        .cta-section::before { content: ''; position: absolute; top: 0; left: 0; right: 0; bottom: 0; background: linear-gradient(45deg, rgba(90,200,250,0.2) 0%, transparent 100%); z-index: 1; }
        .cta-inner { position: relative; z-index: 2; }
        .cta-section h2 { font-size: 36px; margin-bottom: 20px; }
        .cta-section p { font-size: 18px; color: #cbd5e1; margin-bottom: 30px; }

        
        .footer { background: #0f172a; color: #94a3b8; padding: 60px 0 20px; margin-top: 60px; }
        .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
        .footer-brand .logo span { color: #fff; }
        .footer-brand p { margin-top: 20px; font-size: 14px; line-height: 1.8; }
        .footer-title { color: #fff; font-size: 16px; font-weight: 600; margin-bottom: 20px; }
        .footer-links li { margin-bottom: 10px; }
        .footer-links a { font-size: 14px; }
        .footer-links a:hover { color: var(--primary); padding-left: 5px; }
        .footer-bottom { border-top: 1px solid #1e293b; padding-top: 20px; text-align: center; font-size: 13px; display: flex; justify-content: space-between; align-items: center; }

        @media (max-width: 992px) {
            .hero-inner { grid-template-columns: 1fr; text-align: center; }
            .hero-text p { margin: 0 auto 30px; }
            .hero-tags { justify-content: center; }
            .floating-card { display: none; }
            .data-grid { grid-template-columns: repeat(2, 1fr); }
            .feature-grid { grid-template-columns: repeat(2, 1fr); }
            .article-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: 1fr 1fr; }
        }
        @media (max-width: 768px) {
            .nav-desktop, .header-actions .btn { display: none; }
            .mobile-menu-btn { display: block; }
            .hero-text h1 { font-size: 36px; }
            .feature-grid, .article-grid, .footer-grid { grid-template-columns: 1fr; }
            .footer-bottom { flex-direction: column; gap: 10px; }
        }