/* 全局样式 */
        :root {
            --primary-color: #1e87f0;
            --secondary-color: #0f6ecd;
            --dark-color: #222;
            --light-color: #f8f9fa;
            --text-color: #333;
            --text-light: #aaa;
            --white: #fff;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
        }
        
        body {
            color: var(--text-color);
            line-height: 1.6;
            background-color: var(--light-color);
            overflow-x: hidden;
        }
        
        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: var(--transition);
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .section-padding {
            padding: 100px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 36px;
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            width: 60px;
            height: 3px;
            background: var(--primary-color);
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
        }
        
        .section-title p {
            color: var(--text-light);
            max-width: 700px;
            margin: 0 auto;
            font-size: 18px;
        }
        
        .btn {
            display: inline-block;
            padding: 14px 32px;
            border-radius: 30px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 14px;
            transition: var(--transition);
            cursor: pointer;
            border: none;
            outline: none;
        }
        
        .btn-primary {
            background-color: var(--white);
            color: var(--primary-color);
            box-shadow: var(--shadow);
        }
        
        .btn-primary:hover {
            background-color: #f0f0f0;
            transform: translateY(-3px);
        }
        
        .btn-outline {
            border: 2px solid var(--white);
            color: var(--white);
            background: transparent;
        }
        
        .btn-outline:hover {
            background-color: rgba(255, 255, 255, 0.1);
            transform: translateY(-3px);
        }
        
        /* 导航栏 */
        .navbar {
            background-color: var(--white);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            transition: var(--transition);
        }
        
        .navbar.scrolled {
            padding: 10px 0;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            transition: var(--transition);
        }
        
        .logo-container {
            display: flex;
            align-items: center;
        }
        
        .logo-img {
            height: 40px;
            margin-right: 10px;
        }
        
        .logo-text {
            font-size: 24px;
            font-weight: bold;
            color: var(--primary-color);
            display: flex;
            flex-direction: column;
            line-height: 1.2;
        }
        
        .logo-text span {
            font-size: 12px;
            color: var(--text-light);
            font-weight: normal;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 25px;
            position: relative;
        }
        
        .nav-links a {
            color: var(--text-color);
            font-weight: 600;
            font-size: 15px;
            display: flex;
            align-items: center;
        }
        
        .nav-links a i {
            margin-left: 5px;
            font-size: 12px;
        }
        
        .nav-links a:hover {
            color: var(--primary-color);
        }
        
        .nav-links li.active a {
            color: var(--primary-color);
        }
        
        .nav-cta {
            margin-left: 30px;
        }
        
        .nav-cta .btn {
            padding: 10px 25px;
            font-size: 13px;
        }
        
        .mobile-menu-btn {
            display: none;
            font-size: 24px;
            cursor: pointer;
            color: var(--text-color);
        }
        
        /* 英雄区域 */
        .hero {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: var(--white);
            padding: 180px 0 120px;
            position: relative;
            overflow: hidden;
        }
        
        .hero::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('../images/photo-1639762681057-408e52192e55.avif') no-repeat center center/cover;
            opacity: 0.1;
            z-index: 0;
        }
        
        .hero-content {
            position: relative;
            z-index: 1;
            text-align: center;
            max-width: 900px;
            margin: 0 auto;
        }
        
        .hero h1 {
            font-size: 48px;
            margin-bottom: 20px;
            line-height: 1.3;
        }
        
        .hero p {
            font-size: 20px;
            margin: 0 auto 40px;
            opacity: 0.9;
        }
        
        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            margin-top: 30px;
        }
        
        .hero-image {
            margin-top: 50px;
            position: relative;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
            border: 10px solid rgba(255, 255, 255, 0.1);
        }
        
        .hero-image img {
            width: 100%;
            display: block;
            transition: var(--transition);
        }
        
        .hero-image:hover img {
            transform: scale(1.03);
        }
        
        /* 特性区域 */
        .features {
            background-color: var(--white);
            position: relative;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background-color: var(--white);
            padding: 40px 30px;
            border-radius: 10px;
            text-align: center;
            transition: var(--transition);
            box-shadow: var(--shadow);
            border: 1px solid rgba(0, 0, 0, 0.05);
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            width: 80px;
            height: 80px;
            margin: 0 auto 25px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: var(--white);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 32px;
            box-shadow: 0 10px 20px rgba(30, 135, 240, 0.2);
        }
        
        .feature-card h3 {
            margin-bottom: 15px;
            font-size: 22px;
            color: var(--dark-color);
        }
        
        .feature-card p {
            color: var(--text-light);
        }
        
        /* 统计数据 */
        .stats {
            background: linear-gradient(rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.7)), url('../images/photo-1621761191319-c6fb62004040.avif') no-repeat center center/cover;
            color: var(--white);
            text-align: center;
            padding: 100px 0;
            position: relative;
            background-attachment: fixed;
        }
        
        .stats::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(30, 135, 240, 0.8), rgba(15, 110, 205, 0.8));
            z-index: 1;
        }
        
        .stats-content {
            position: relative;
            z-index: 2;
        }
        
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
            margin-top: 50px;
        }
        
        .stat-item {
            padding: 30px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 10px;
            backdrop-filter: blur(5px);
            transition: var(--transition);
        }
        
        .stat-item:hover {
            transform: translateY(-5px);
            background: rgba(255, 255, 255, 0.2);
        }
        
        .stat-item i {
            font-size: 40px;
            margin-bottom: 15px;
            color: var(--white);
        }
        
        .stat-item h3 {
            font-size: 48px;
            margin-bottom: 10px;
            font-weight: 700;
        }
        
        .stat-item p {
            font-size: 18px;
            opacity: 0.9;
        }
        
        /* 推广展示 */
        .promotion {
            background-color: var(--light-color);
        }
        
        .promotion-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 50px;
            align-items: center;
        }
        
        .promotion-content {
            padding-right: 30px;
        }
        
        .promotion-content h2 {
            font-size: 36px;
            margin-bottom: 20px;
            color: var(--dark-color);
        }
        
        .promotion-content p {
            margin-bottom: 30px;
            color: var(--text-light);
            font-size: 16px;
        }
        
        .promotion-features {
            margin-bottom: 30px;
        }
        
        .promotion-feature {
            display: flex;
            align-items: flex-start;
            margin-bottom: 15px;
        }
        
        .promotion-feature i {
            color: var(--primary-color);
            font-size: 20px;
            margin-right: 15px;
            margin-top: 3px;
        }
        
        .promotion-image {
            position: relative;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        
        .promotion-image img {
            width: 100%;
            display: block;
            transition: var(--transition);
        }
        
        .promotion-image:hover img {
            transform: scale(1.05);
        }
        
        /* 合作伙伴 */
        .partners {
            background-color: var(--white);
        }
        
        .partner-logos {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            align-items: center;
            background: rgb(63 56 167 / 68%);
        }
        
        .partner-logo {
            max-width: 150px;
            filter: grayscale(100%);
            opacity: 0.6;
            transition: var(--transition);
        }
        
        .partner-logo:hover {
            filter: grayscale(0);
            opacity: 1;
        }
        
        /* 页脚 */
        footer {
            background-color: var(--dark-color);
            color: var(--text-light);
            padding: 80px 0 30px;
            position: relative;
        }
        
        .footer-top {
            margin-bottom: 50px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 40px;
        }
        
        .footer-column h3 {
            color: var(--white);
            margin-bottom: 25px;
            font-size: 18px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            width: 40px;
            height: 2px;
            background: var(--primary-color);
            bottom: 0;
            left: 0;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 12px;
        }
        
        .footer-column ul li a {
            color: var(--text-light);
            font-size: 14px;
            display: inline-block;
            transition: var(--transition);
        }
        
        .footer-column ul li a:hover {
            color: var(--white);
            transform: translateX(5px);
        }
        
        .footer-social {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .footer-social a {
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--white);
            transition: var(--transition);
        }
        
        .footer-social a:hover {
            background: var(--primary-color);
            transform: translateY(-5px);
        }
        
        .footer-newsletter p {
            margin-bottom: 20px;
        }
        
        .newsletter-form {
            display: flex;
        }
        
        .newsletter-form input {
            flex: 1;
            padding: 12px 15px;
            border: none;
            outline: none;
            border-radius: 30px 0 0 30px;
            font-size: 14px;
        }
        
        .newsletter-form button {
            background: var(--primary-color);
            color: var(--white);
            border: none;
            padding: 0 20px;
            border-radius: 0 30px 30px 0;
            cursor: pointer;
            transition: var(--transition);
        }
        
        .newsletter-form button:hover {
            background: var(--secondary-color);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 14px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .section-padding {
                padding: 80px 0;
            }
            
            .hero {
                padding: 150px 0 80px;
            }
            
            .hero h1 {
                font-size: 40px;
            }
            
            .promotion-container {
                grid-template-columns: 1fr;
            }
            
            .promotion-content {
                padding-right: 0;
                order: 1;
            }
            
            .promotion-image {
                order: 2;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                position: fixed;
                top: 80px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 80px);
                background: var(--white);
                flex-direction: column;
                align-items: center;
                justify-content: flex-start;
                padding-top: 40px;
                transition: var(--transition);
            }
            
            .nav-links.active {
                left: 0;
            }
            
            .nav-links li {
                margin: 0 0 25px 0;
            }
            
            .nav-cta {
                margin-left: 0;
                margin-top: 20px;
            }
            
            .mobile-menu-btn {
                display: block;
            }
            
            .hero h1 {
                font-size: 32px;
            }
            
            .hero p {
                font-size: 18px;
            }
            
            .cta-buttons {
                flex-direction: column;
                align-items: center;
            }
            
            .btn {
                width: 100%;
                max-width: 300px;
            }
            
            .section-title h2 {
                font-size: 30px;
            }
            
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            
            .stat-item h3 {
                font-size: 36px;
            }
        }
        
        @media (max-width: 576px) {
            .section-padding {
                padding: 60px 0;
            }
            
            .hero {
                padding: 120px 0 60px;
            }
            
            .stats-grid {
                grid-template-columns: 1fr;
            }
            
            .partner-logos {
                gap: 20px;
            }
            
            .partner-logo {
                max-width: 120px;
            }
        }