* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }
        :root { 
            --primary: #2563eb;
            --secondary: #7c3aed;
            --gradient: linear-gradient(135deg, #2563eb 0%, #7c3aed 100%);
            --light-bg: #f8fafc;
            --white: #ffffff;
            --text-primary: #1e293b;
            --text-secondary: #64748b;
            --border-color: #e2e8f0;
            --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
        }
        body { font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif; background: var(--white); color: var(--text-primary); line-height: 1.6; }
        
        /* Navbar */
        .navbar { position: fixed; top: 0; width: 100%; z-index: 1000; padding: 0.8rem 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(20px); box-shadow: 0 1px 2px rgba(0,0,0,0.05); transition: all 0.3s; }
        .navbar.scrolled { padding: 0.5rem 0; box-shadow: var(--shadow-lg); }
        .nav-container { display: flex; justify-content: space-between; align-items: center; max-width: 1600px; margin: 0 auto; padding: 0 4%; }
        .logo { font-size: 1.4rem; font-weight: bold; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; white-space: nowrap; }
        .nav-links { display: flex; list-style: none; gap: 3rem; align-items: center; }
        .nav-links a { color: var(--text-primary); text-decoration: none; font-weight: 500; transition: all 0.3s; font-size: 0.95rem; }
        .nav-links a:hover { color: var(--primary); }
		.nav-links li.active a{color:#3a72ff}
        .nav-cta { background: var(--gradient); color: white !important; padding: 0.6rem 1.5rem; border-radius: 25px; font-weight: 600; font-size: 0.9rem !important; }
        .nav-cta:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }
        .mobile-menu-btn { display: none; background: none; border: none; font-size: 1.5rem; cursor: pointer; padding: 0.5rem; color: var(--text-primary); }
        
        .page-header { padding: 160px 5% 60px; text-align: center; background: linear-gradient(135deg, #eff6ff 0%, #fff 50%, #f5f3ff 100%); }
        .page-title { font-size: clamp(2.5rem, 5vw, 3.5rem); margin-bottom: 1rem; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .page-subtitle { color: var(--text-secondary); font-size: 1.3rem; }
        
        .section { padding: 80px 5%; max-width: 1600px; margin: 0 auto; }
/* ========================================
   浮动联系菜单
   ======================================== */
.float-menu { 
    position: fixed; 
    right: 20px; 
    top: 50%; 
    transform: translateY(-50%); 
    z-index: 999; 
    display: flex; 
    flex-direction: column; 
    gap: 10px; 
}
.float-item { 
    position: relative; 
    width: 55px; 
    height: 55px; 
    background: white; 
    border-radius: 50%; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-size: 1.5rem; 
    cursor: pointer; 
    box-shadow: var(--shadow-lg); 
    border: 2px solid var(--border-color); 
    transition: all 0.3s; 
	text-decoration:none;
}
.float-item:hover { 
    transform: scale(1.1); 
    border-color: var(--primary); 
}
.float-item .float-icon { 
    display: flex; 
    align-items: center; 
    justify-content: center; 
}
.float-item .float-popup { 
    position: absolute; 
    right: 70px; 
    top: 50%; 
    transform: translateY(-50%) translateX(20px); 
    background: white; 
    padding: 1.5rem; 
    border-radius: 15px; 
    box-shadow: var(--shadow-xl); 
    border: 2px solid var(--border-color); 
    opacity: 0; 
    visibility: hidden; 
    transition: all 0.3s; 
    white-space: nowrap; 
    min-width: 200px; 
}
.float-item:hover .float-popup { 
    opacity: 1; 
    visibility: visible; 
    transform: translateY(-50%) translateX(0); 
}
.float-popup-title { 
    font-weight: 700; 
    color: var(--text-primary); 
    margin-bottom: 0.8rem; 
    font-size: 0.95rem; 
}
.float-popup-content { 
    display: flex; 
    align-items: center; 
    gap: 1rem; 
}
.float-popup-phone { 
    font-size: 1.1rem; 
    color: var(--primary); 
    font-weight: 600; 
}
.float-popup-qr { 
    width: 120px; 
    height: 120px; 
    background: var(--light-bg); 
    border-radius: 10px; 
    display: flex; 
    align-items: center; 
    justify-content: center; 
    font-size: 3rem; 
    border: 2px dashed var(--border-color); 
}
.float-popup-qr img { 
    width: 100%; 
    height: 100%; 
    object-fit: contain; 
    border-radius: 8px; 
}
.float-item.phone:hover { 
    background: linear-gradient(135deg, #10b981, #059669); 
    border-color: transparent; 
}
.float-item.phone .float-icon { 
    color: white; 
}
.float-item.wechat:hover { 
    background: linear-gradient(135deg, #07c160, #06ad56); 
    border-color: transparent; 
}
.float-item.wechat .float-icon { 
    color: white; 
}
.float-item.qq:hover { 
    background: linear-gradient(135deg, #12b7f5, #0ea5e9); 
    border-color: transparent; 
}
.float-item.qq .float-icon { 
    color: white; 
}
        /* About Section */
        .about-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 6rem; align-items: center; margin-bottom: 6rem; }
        .about-text h2 { font-size: 2.5rem; margin-bottom: 1.8rem; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2; }
        .about-text > p { color: var(--text-secondary); font-size: 1.15rem; line-height: 2; margin-bottom: 2rem; }
        .about-stats { display: grid; grid-template-columns: repeat(6, 1fr); gap: 2rem; margin-top: 3rem; }
        .stat-item { text-align: center; padding: 2rem; background: var(--light-bg); border-radius: 20px; border: 1px solid var(--border-color); transition: all 0.3s; }
        .stat-item:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
        .stat-number { font-size: 2.2rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
        .stat-label { color: var(--text-secondary); font-size: 0.95rem; margin-top: 0.5rem; font-weight: 500; }
        
        .about-visual { height: 450px; background: linear-gradient(135deg, rgba(37,99,235,0.08), rgba(124,58,237,0.08)); border-radius: 30px; display: flex; align-items: center; justify-content: center; font-size: 10rem; border: 1px solid var(--border-color); animation: float 6s ease-in-out infinite; }
        @keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-20px); } }
        
        /* MVV Section */
        .mvv-section { background: var(--light-bg); padding: 100px 5%; }
        .mvv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3rem; max-width: 1400px; margin: 0 auto; }
        .mvv-card { background: white; padding: 3rem; border-radius: 25px; border: 1px solid var(--border-color); transition: all 0.4s; text-align: center; }
        .mvv-card:hover { transform: translateY(-15px); box-shadow: var(--shadow-lg); }
        .mvv-icon { width: 100px; height: 100px; background: linear-gradient(135deg, rgba(37,99,235,0.1), rgba(124,58,237,0.1)); border-radius: 30px; display: flex; align-items: center; justify-content: center; font-size: 2.8rem; margin: 0 auto 2rem; transition: all 0.3s; }
        .mvv-card:hover .mvv-icon { background: var(--gradient); color: white; transform: scale(1.1); }
        .mvv-title { font-size: 1.8rem; margin-bottom: 1rem; font-weight: 700; }
        .mvv-desc { color: var(--text-secondary); line-height: 1.9; font-size: 1.05rem; }
        
        /* Timeline Section */
        .timeline-section { padding: 100px 5%; }
        .timeline-header { text-align: center; margin-bottom: 5rem; }
        .timeline-header h2 { font-size: 2.8rem; margin-bottom: 1rem; }
        .timeline { position: relative; max-width: 1200px; margin: 0 auto; }
        .timeline::before { content: ''; position: absolute; left: 50%; transform: translateX(-50%); width: 4px; height: 100%; background: linear-gradient(to bottom, var(--primary), var(--secondary)); border-radius: 2px; }
        .timeline-item { display: flex; justify-content: center; margin-bottom: 5rem; position: relative; }
        .timeline-year { position: absolute; left: 50%; transform: translateX(-50%); background: var(--gradient); color: white; padding: 0.8rem 2rem; border-radius: 30px; font-weight: 700; font-size: 1.2rem; z-index: 2; box-shadow: var(--shadow-lg); }
        .timeline-content { width: 45%; background: white; padding: 2.5rem; border-radius: 20px; border: 1px solid var(--border-color); box-shadow: var(--shadow-lg); transition: all 0.3s; }
        .timeline-content:hover { transform: translateX(10px); border-color: var(--primary); }
        .timeline-item:nth-child(even) { flex-direction: row-reverse; }
        .timeline-content h3 { font-size: 1.5rem; margin-bottom: 1rem; color: var(--primary); }
        .timeline-content p { color: var(--text-secondary); line-height: 1.8; }
        
        /* Certifications Section */
        .cert-section { background: var(--light-bg); padding: 100px 5%; }
        .cert-header { text-align: center; margin-bottom: 5rem; }
        .cert-header h2 { font-size: 2.8rem; margin-bottom: 1rem; }
        .cert-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 3rem; max-width: 1200px; margin: 0 auto; }
        .cert-card { background: white; padding: 3rem 2rem; border-radius: 25px; text-align: center; border: 1px solid var(--border-color); transition: all 0.4s; }
        .cert-card:hover { transform: translateY(-15px); box-shadow: var(--shadow-lg); }
        .cert-icon { font-size: 5rem; margin-bottom: 1.5rem; }
        .cert-name { font-size: 1.5rem; font-weight: 700; margin-bottom: 0.8rem; }
        .cert-desc { color: var(--text-secondary); font-size: 1rem; }
        
        /* Team Stats Section */
        .team-section { padding: 100px 5%; }
        .team-header { text-align: center; margin-bottom: 5rem; }
        .team-header h2 { font-size: 2.8rem; margin-bottom: 1rem; }
        .team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 3rem; max-width: 1200px; margin: 0 auto; text-align: center; }
        .team-stat .number { font-size: 4rem; font-weight: 800; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; line-height: 1.2; }
        .team-stat .label { color: var(--text-secondary); margin-top: 1rem; font-size: 1.1rem; font-weight: 500; }
        
        /* Footer */
        footer { background: #0f172a; padding: 50px 4% 25px; color: #94a3b8; }
        .footer-grid { max-width: 1600px; margin: 0 auto; display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 2.5rem; margin-bottom: 3rem; }
        .footer-brand h3 { font-size: 1.3rem; color: white; margin-bottom: 0.8rem; }
        .footer-brand p { margin-bottom: 1.2rem; line-height: 1.7; font-size: 0.9rem; }
        .social-links { display: flex; gap: 0.8rem; }
        .social-link { width: 40px; height: 40px; background: rgba(255,255,255,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.1rem; transition: all 0.3s; }
        .social-link:active { background: var(--gradient); transform: translateY(-3px); }
        .footer-links h4 { color: white; margin-bottom: 1.2rem; font-weight: 600; font-size: 1rem; }
        .footer-links ul { list-style: none; }
        .footer-links li { margin-bottom: 0.7rem; }
        .footer-links a { color: #94a3b8; text-decoration: none; transition: all 0.3s; font-size: 0.9rem; }
        .footer-links a:active { color: white; }
        .copyright { text-align: center; padding-top: 1.5rem; border-top: 1px solid #1e293b; font-size: 0.85rem; }
		.copyright a{color:#ffffff;text-decoration: none;}
        
        @media (max-width: 1024px) {
            .about-grid { grid-template-columns: 1fr; }
            .about-stats { grid-template-columns: repeat(2, 1fr); }
            .mvv-grid { grid-template-columns: 1fr; max-width: 600px; }
            .timeline::before { left: 30px; }
            .timeline-item { flex-direction: column !important; padding-left: 70px; }
            .timeline-year { left: 30px; transform: translateX(-50%); }
            .timeline-content { width: 100%; }
            .cert-grid { grid-template-columns: repeat(2, 1fr); }
            .team-grid { grid-template-columns: repeat(2, 1fr); }
        }
        
        @media (max-width: 768px) {
            .mobile-menu-btn { display: block; }
            .nav-links { position: fixed; top: 60px; left: 0;gap: 1.2rem; right: 0; background: white; flex-direction: column; padding: 1.5rem; transform: translateY(-100%); opacity: 0; transition: all 0.3s; box-shadow: 0 4px 10px rgba(0,0,0,0.1); visibility: hidden; }
            .nav-links.active { transform: translateY(0); opacity: 1; visibility: visible; }
            .nav-links li { width: 100%; text-align: center; }
            .nav-links a { display: block; padding: 0.8rem; font-size: 1.1rem; }
            
            .page-header { padding: 100px 4% 30px; }
            .page-title { font-size: 1.8rem; }
            .page-subtitle { font-size: 0.95rem; }
            
            .section { padding: 40px 4%; }
            
            .about-grid { gap: 2rem; }
            .about-text h2 { font-size: 1.6rem; }
            .about-text > p { font-size: 0.95rem; }
            .about-stats { grid-template-columns: 1fr 1fr; gap: 1rem; }
            .stat-item { padding: 1.2rem; }
            .stat-number { font-size: 1.5rem; }
            .stat-label { font-size: 0.8rem; }
            .about-visual { height: 200px; font-size: 5rem; border-radius: 20px; }
            
            .mvv-section { padding: 60px 4%; }
            .mvv-grid { gap: 1.5rem; }
            .mvv-card { padding: 2rem 1.5rem; }
            .mvv-icon { width: 70px; height: 70px; font-size: 2rem; }
            .mvv-title { font-size: 1.3rem; }
            .mvv-desc { font-size: 0.95rem; }
            
            .timeline-section { padding: 60px 4%; }
            .timeline-header h2 { font-size: 1.8rem; }
            .timeline-item { margin-bottom: 3rem; padding-left: 60px; }
            .timeline-year { padding: 0.5rem 1.2rem; font-size: 1rem; }
            .timeline-content { padding: 1.5rem; }
            .timeline-content h3 { font-size: 1.2rem; }
            .timeline-content p { font-size: 0.9rem; }
            
            .cert-section { padding: 60px 4%; }
            .cert-header h2 { font-size: 1.8rem; }
            .cert-grid { grid-template-columns: 1fr 1fr; gap: 1.5rem; }
            .cert-card { padding: 2rem 1.2rem; }
            .cert-icon { font-size: 3.5rem; }
            .cert-name { font-size: 1.1rem; }
            .cert-desc { font-size: 0.85rem; }
            
            .team-section { padding: 60px 4%; }
            .team-header h2 { font-size: 1.8rem; }
            .team-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
            .team-stat .number { font-size: 2.5rem; }
            .team-stat .label { font-size: 0.9rem; }
            
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
            .footer-brand { grid-column: 1 / -1; }
            .social-links { justify-content: center; }
            /* 移动端隐藏浮动菜单 */
            .float-menu { display: none; }
        }
        
        @media (max-width: 480px) {
            html { font-size: 14px; }
            .nav-container { padding: 0 3%; }
            .logo { font-size: 1.2rem; }
            
            .about-stats { grid-template-columns: 1fr; }
            .cert-grid { grid-template-columns: 1fr; }
            .team-grid { grid-template-columns: 1fr; }
			
            .footer-grid { grid-template-columns: 1fr; text-align: center; }
            .footer-brand { grid-column: 1; }
            .social-links { justify-content: center; }
            /* 移动端隐藏浮动菜单 */
            .float-menu { display: none; }
        }
        
        /* 触摸优化 */
        @media (hover: none) and (pointer: coarse) {
            .stat-item:hover, .mvv-card:hover, .timeline-content:hover, .cert-card:hover, .team-stat:hover { transform: none; }
            .stat-item:active, .mvv-card:active, .cert-card:active { transform: translateY(-3px); }
        }