/* ========== 基础重置 ========== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        :root {
            --primary: rgb(37, 138, 197);
            --primary-dark: rgb(30, 110, 160);
            --primary-light: rgb(80, 170, 220);
            --primary-lighter: rgb(150, 200, 240);
            --secondary: #ff7c35; /* 暖橙色 */
            --secondary-dark: #e56b2b;
            --accent: #2ecc71; /* 绿色 */
            --accent-dark: #27ae60;
            --dark: #2c3e50; /* 深蓝色 */
            --light: #f8f9fa;
            --gray: #6c757d;
            --white: #ffffff;
            --shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
            --transition: all 0.3s ease;
        }
        
        body {
            font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
            line-height: 1.6;
            color: var(--dark);
            overflow-x: hidden;
            background-color: var(--light);
        }
        
        a {
            text-decoration: none;
            color: inherit;
        }
        
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .section-padding {
            padding: 80px 0;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 28px;
            border-radius: 8px;
            font-weight: 600;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            gap: 8px;
        }
        
        /* ========== 重新设计导航栏 ========== */
        .main-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            /* 方案1：深蓝到主色的渐变 */
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 30%, var(--primary) 100%);
            /* 方案2：主色到浅蓝的渐变 */
            /* background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%); */
            /* 方案3：带纹理的主色背景 */
            /* background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 50%, var(--primary-light) 100%); */
            box-shadow: 0 4px 20px rgba(37, 138, 197, 0.15), 
                        0 2px 10px rgba(0, 0, 0, 0.05);
            z-index: 1000;
            transition: var(--transition);
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        
        .main-header::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-image: 
                radial-gradient(circle at 10% 20%, rgba(255, 255, 255, 0.05) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, rgba(255, 255, 255, 0.05) 0%, transparent 20%);
            pointer-events: none;
        }
        
        .header-scrolled {
            box-shadow: 0 6px 25px rgba(37, 138, 197, 0.2), 
                        0 4px 15px rgba(0, 0, 0, 0.08);
            background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 40%, var(--primary) 100%);
        }
        
        .navbar {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 80px;
            position: relative;
            z-index: 1;
        }
        
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
            text-decoration: none;
        }
        
        .logo-img {
            height: 50px;
            width: auto;
            transition: var(--transition);
        }
        
        .logo:hover .logo-img {
            transform: scale(1.05);
        }
        
        .logo-text h2 {
            font-size: 1.5rem;
            color: var(--white);
            margin-bottom: 0;
            font-weight: 700;
            text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
        }
        
        .logo-text p {
            font-size: 0.75rem;
            color: rgba(255, 255, 255, 0.85);
            margin: 0;
        }
        
        /* 导航菜单设计 */
        .nav-links {
            display: flex;
            gap: 35px;
            list-style: none;
        }
        
        .nav-links li {
            position: relative;
        }
        
        .nav-links a {
            font-weight: 600;
            font-size: 1rem;
            position: relative;
            padding: 8px 0;
            color: rgba(255, 255, 255, 0.9);
            transition: var(--transition);
        }
        
        .nav-links a::before {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 3px;
            background: linear-gradient(90deg, var(--secondary), var(--accent));
            border-radius: 2px;
            transition: width 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        
        .nav-links a:hover::before,
        .nav-links a.active::before {
            width: 100%;
        }
        
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--white);
            text-shadow: 0 0 8px rgba(255, 255, 255, 0.3);
        }
        
        /* 新增悬停效果 */
        .nav-links a::after {
            content: '';
            position: absolute;
            bottom: -5px;
            left: 50%;
            transform: translateX(-50%);
            width: 6px;
            height: 6px;
            background: var(--white);
            border-radius: 50%;
            opacity: 0;
            transition: opacity 0.3s ease;
        }
        
        .nav-links a:hover::after,
        .nav-links a.active::after {
            opacity: 1;
        }
        
        /* 新的联系区域设计 */
        .header-contact {
            display: flex;
            align-items: center;
            gap: 25px;
        }
        
        .contact-phone {
            display: flex;
            align-items: center;
            gap: 8px;
            font-weight: 700;
            color: var(--white);
            padding: 10px 18px;
            background: rgba(255, 255, 255, 0.15);
            border-radius: 30px;
            transition: var(--transition);
            border: 1px solid rgba(255, 255, 255, 0.2);
            backdrop-filter: blur(5px);
        }
        
        .contact-phone:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
            box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
        }
        
        .contact-phone svg {
            color: var(--white);
        }
        
        /* 重新设计在线报名按钮 */
        .header-actions .btn-primary {
            padding: 14px 32px;
            border-radius: 50px;
            background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
            color: var(--white);
            font-weight: 700;
            font-size: 1.05rem;
            box-shadow: 0 6px 20px rgba(255, 124, 53, 0.4),
                        0 2px 8px rgba(0, 0, 0, 0.1),
                        inset 0 1px 0 rgba(255, 255, 255, 0.3);
            border: none;
            position: relative;
            overflow: hidden;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            z-index: 1;
        }
        
        .header-actions .btn-primary::before {
            content: '';
            position: absolute;
            top: 0;
            left: -100%;
            width: 100%;
            height: 100%;
            background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
            transition: left 0.7s ease;
            z-index: -1;
        }
        
        .header-actions .btn-primary:hover {
            transform: translateY(-4px) scale(1.05);
            box-shadow: 0 12px 30px rgba(255, 124, 53, 0.5),
                        0 4px 15px rgba(0, 0, 0, 0.15),
                        inset 0 1px 0 rgba(255, 255, 255, 0.4);
            background: linear-gradient(135deg, var(--secondary-dark), #ff5722);
        }
        
        .header-actions .btn-primary:hover::before {
            left: 100%;
        }
        
        .header-actions .btn-primary:active {
            transform: translateY(-1px) scale(1.02);
        }
        
        /* 移动端菜单按钮 */
        .mobile-menu-btn {
            display: none;
            flex-direction: column;
            gap: 5px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.2);
            cursor: pointer;
            padding: 10px;
            border-radius: 6px;
            transition: var(--transition);
            backdrop-filter: blur(5px);
        }
        
        .mobile-menu-btn:hover {
            background: rgba(255, 255, 255, 0.25);
            transform: translateY(-2px);
        }
        
        .mobile-menu-btn span {
            width: 25px;
            height: 3px;
            background: var(--white);
            border-radius: 2px;
            transition: var(--transition);
        }
        
        /* ========== 英雄区域 ========== */
        .hero {
            background: linear-gradient(135deg, rgba(37, 138, 197, 0.05) 0%, rgba(37, 138, 197, 0.1) 100%);
            padding: 180px 0 100px;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            right: 0;
            width: 50%;
            height: 100%;
            background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 800 800"><path fill="%23258ac5" fill-opacity="0.05" d="M400,0C179,0,0,179,0,400s179,400,400,400s400-179,400-400S621,0,400,0z M400,100c165,0,300,135,300,300S565,700,400,700S100,565,100,400S235,100,400,100z"/></svg>') no-repeat center;
            background-size: contain;
            opacity: 0.5;
        }
        
        .hero-content {
            max-width: 800px;
            position: relative;
            z-index: 1;
        }
        
        .hero h1 {
            font-size: 3.2rem;
            line-height: 1.2;
            margin-bottom: 20px;
            color: var(--dark);
        }
        
        .hero-subtitle {
            font-size: 1.3rem;
            color: var(--gray);
            margin-bottom: 40px;
            max-width: 600px;
        }
        
        .hero-stats {
            display: flex;
            gap: 40px;
            margin-top: 60px;
        }
        
        .stat-item {
            text-align: center;
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: 800;
            color: var(--primary);
            display: block;
            line-height: 1;
        }
        
        .stat-label {
            font-size: 0.9rem;
            color: var(--gray);
            margin-top: 5px;
        }
        
        /* ========== 时间轴 ========== */
        .timeline-section {
            background: var(--white);
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            color: var(--dark);
            margin-bottom: 20px;
        }
        
        .section-subtitle {
            text-align: center;
            color: var(--gray);
            font-size: 1.1rem;
            max-width: 600px;
            margin: 0 auto 60px;
        }
        
        .timeline {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
        }
        
        .timeline::before {
            content: '';
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
            width: 3px;
            height: 100%;
            background: linear-gradient(to bottom, var(--primary), var(--primary-light));
        }
        
        .timeline-item {
            display: flex;
            margin-bottom: 60px;
            position: relative;
        }
        
        .timeline-item:nth-child(odd) {
            flex-direction: row;
        }
        
        .timeline-item:nth-child(even) {
            flex-direction: row-reverse;
        }
        
        .timeline-year {
            flex: 0 0 120px;
            text-align: center;
            padding: 10px;
            position: relative;
            z-index: 1;
        }
        
        .timeline-year span {
            display: inline-block;
            background: var(--primary);
            color: var(--white);
            padding: 12px 24px;
            border-radius: 30px;
            font-weight: 700;
            font-size: 1.1rem;
            min-width: 100px;
        }
        
        .timeline-content {
            flex: 1;
            padding: 0 40px;
        }
        
        .timeline-card {
            background: var(--white);
            border-radius: 15px;
            padding: 30px;
            box-shadow: var(--shadow);
            border-left: 5px solid var(--primary);
            transition: var(--transition);
            height: 100%;
        }
        
        .timeline-item:nth-child(even) .timeline-card {
            border-left: none;
            border-right: 5px solid var(--primary);
        }
        
        .timeline-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-lg);
        }
        
        .timeline-card h3 {
            font-size: 1.5rem;
            color: var(--dark);
            margin-bottom: 15px;
        }
        
        .timeline-card ul {
            list-style: none;
            padding-left: 20px;
        }
        
        .timeline-card li {
            position: relative;
            padding-left: 25px;
            margin-bottom: 10px;
            color: var(--dark);
        }
        
        .timeline-card li::before {
            content: '✓';
            position: absolute;
            left: 0;
            color: var(--accent);
            font-weight: bold;
        }
        
        .timeline-marker {
            position: absolute;
            left: 50%;
            top: 50%;
            transform: translate(-50%, -50%);
            width: 20px;
            height: 20px;
            background: var(--white);
            border: 4px solid var(--primary);
            border-radius: 50%;
            z-index: 1;
        }
        
        /* ========== 核心业务 ========== */
        .services-section {
            background: var(--light);
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .service-card {
            background: var(--white);
            border-radius: 15px;
            padding: 40px 30px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border-top: 4px solid var(--primary);
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: var(--shadow-lg);
        }
        
        .service-icon {
            width: 70px;
            height: 70px;
            margin: 0 auto 25px;
            background: linear-gradient(135deg, var(--primary-light), var(--primary));
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            font-size: 1.8rem;
        }
        
        .service-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--dark);
        }
        
        .service-card p {
            color: var(--gray);
            margin-bottom: 20px;
        }
        
        /* ========== 优势展示 ========== */
        .advantages-section {
            background: var(--white);
        }
        
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }
        
        .advantage-item {
            background: var(--light);
            border-radius: 15px;
            padding: 30px;
            display: flex;
            align-items: flex-start;
            gap: 20px;
            border-left: 4px solid var(--primary);
        }
        
        .advantage-number {
            flex-shrink: 0;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 800;
            font-size: 1.2rem;
        }
        
        .advantage-content h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--dark);
        }
        
        .advantage-content p {
            color: var(--gray);
        }
        
        /* ========== CTA区域 ========== */
        .cta-section {
            background: linear-gradient(135deg, var(--dark), var(--primary));
            color: var(--white);
            text-align: center;
            padding: 100px 0;
        }
        
        .cta-content h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .cta-content p {
            font-size: 1.1rem;
            opacity: 0.9;
            max-width: 600px;
            margin: 0 auto 40px;
        }
        
        .cta-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }
        
        .cta-buttons .btn-primary {
            background: var(--secondary);
            color: var(--white);
            box-shadow: 0 6px 20px rgba(255, 124, 53, 0.4);
        }
        
        .cta-buttons .btn-primary:hover {
            background: var(--secondary-dark);
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255, 124, 53, 0.5);
        }
        
        .cta-buttons .btn-secondary {
            border-color: var(--white);
            color: var(--white);
        }
        
        .cta-buttons .btn-secondary:hover {
            background: var(--white);
            color: var(--primary);
        }
        
        /* ========== 页脚 ========== */
        .main-footer {
            background: var(--dark);
            color: var(--white);
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-logo h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--white);
        }
        
        .footer-logo p {
            color: rgba(255, 255, 255, 0.7);
            margin-bottom: 20px;
        }
        
        .contact-info p {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 10px;
            color: rgba(255, 255, 255, 0.8);
        }
        
        .footer-links h4 {
            font-size: 1.2rem;
            margin-bottom: 20px;
            color: var(--white);
        }
        
        .footer-links ul {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: rgba(255, 255, 255, 0.7);
            transition: var(--transition);
        }
        
        .footer-links a:hover {
            color: var(--white);
            padding-left: 5px;
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.9rem;
        }
        
        /* ========== 响应式设计 ========== */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .nav-links {
                gap: 20px;
            }
            
            .header-contact {
                gap: 15px;
            }
            
            .contact-phone {
                font-size: 0.9rem;
                padding: 8px 14px;
            }
            
            .header-actions .btn-primary {
                padding: 12px 24px;
                font-size: 1rem;
            }
        }
        
        @media (max-width: 768px) {
            .mobile-menu-btn {
                display: flex;
            }
            
            .nav-links {
                position: fixed;
                top: 80px;
                left: 0;
                width: 100%;
                background: linear-gradient(135deg, var(--dark) 0%, var(--primary-dark) 40%, var(--primary) 100%);
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                gap: 0;
                border-top: 1px solid rgba(255, 255, 255, 0.15);
                z-index: 999;
            }
            
            .nav-links.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            
            .nav-links li {
                width: 100%;
            }
            
            .nav-links a {
                display: block;
                padding: 15px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.1);
                color: rgba(255, 255, 255, 0.9);
            }
            
            .nav-links a::before {
                height: 2px;
            }
            
            .nav-links a::after {
                display: none;
            }
            
            .header-contact {
                display: none;
            }
            
            .hero {
                padding: 150px 0 80px;
            }
            
            .hero h1 {
                font-size: 2.2rem;
            }
            
            .hero-stats {
                flex-wrap: wrap;
                gap: 30px;
            }
            
            .timeline::before {
                left: 30px;
            }
            
            .timeline-item {
                flex-direction: row !important;
                margin-bottom: 40px;
            }
            
            .timeline-year {
                flex: 0 0 80px;
            }
            
            .timeline-year span {
                min-width: 70px;
                font-size: 1rem;
                padding: 10px 15px;
            }
            
            .timeline-content {
                padding: 0 0 0 20px;
            }
            
            .timeline-marker {
                left: 30px;
            }
            
            .section-padding {
                padding: 60px 0;
            }
            
            /* 移动端显示的电话按钮 */
            .mobile-contact-btn {
                display: flex !important;
                align-items: center;
                justify-content: center;
                width: 50px;
                height: 50px;
                background: linear-gradient(135deg, var(--secondary), var(--secondary-dark));
                border-radius: 50%;
                color: var(--white);
                text-decoration: none;
                box-shadow: 0 4px 12px rgba(255, 124, 53, 0.4);
                transition: var(--transition);
                margin-left: 10px;
            }
            
            .mobile-contact-btn:hover {
                transform: translateY(-3px);
                box-shadow: 0 8px 20px rgba(255, 124, 53, 0.5);
            }
            
            .mobile-contact-btn svg {
                width: 22px;
                height: 22px;
            }
        }
        
        @media (max-width: 480px) {
            .hero h1 {
                font-size: 1.8rem;
            }
            
            .hero-subtitle {
                font-size: 1.1rem;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .stat-number {
                font-size: 2rem;
            }
            
            .cta-content h2 {
                font-size: 2rem;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .cta-buttons .btn {
                width: 100%;
                max-width: 300px;
            }
        }
        
        /* ========== 返回顶部按钮 ========== */
        .back-to-top {
            position: fixed;
            bottom: 30px;
            right: 30px;
            width: 50px;
            height: 50px;
            background: linear-gradient(135deg, var(--primary), var(--primary-dark));
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
            border: none;
            z-index: 999;
            box-shadow: 0 6px 20px rgba(37, 138, 197, 0.3);
            border: 2px solid rgba(255, 255, 255, 0.3);
        }
        
        .back-to-top.active {
            opacity: 1;
            visibility: visible;
        }
        
        .back-to-top:hover {
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            transform: translateY(-5px) scale(1.1);
            box-shadow: 0 10px 25px rgba(37, 138, 197, 0.4);
        }
        
        /* 移动端电话按钮 */
        .mobile-contact-btn {
            display: none;
        }