/* 广告横幅 */
        .promo-banner {
            background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
            color: white;
            text-align: center;
            padding: 15px 0;
            position: relative;
            overflow: hidden;
            margin-top: 70px;
        }
        
        .promo-banner p {
            font-size: 1.2rem;
            font-weight: 500;
            animation: pulse 2s infinite;
        }
        
        .promo-banner .highlight {
            font-weight: 700;
            color: #ffeb3b;
            text-shadow: 0 0 5px rgba(0, 0, 0, 0.3);
        }
        
        /* 轮播图样式 */
        .hero-slider {
            position: relative;
            height: 80vh;
            overflow: hidden;
        }
        
        .slide {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            opacity: 0;
            transition: opacity 1s ease;
            display: flex;
            align-items: center;
            justify-content: center;
            text-align: center;
            color: white;
        }
        
        .slide:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(135deg, rgba(26, 103, 198, 0.85), rgba(52, 199, 179, 0.85));
        }
        
        .slide.active {
            opacity: 1;
        }
        
        .slide-img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            z-index: -1;
        }
        
        .slide-content {
            position: relative;
            z-index: 1;
            max-width: 800px;
            padding: 0 20px;
            animation: fadeInUp 1s ease;
        }
        
        .slide-content h2 {
            font-size: 3.5rem;
            margin-bottom: 20px;
            font-weight: 700;
        }
        
        .slide-content p {
            font-size: 1.5rem;
            margin-bottom: 30px;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 30px;
            background-color: var(--accent-color);
            color: white;
            border-radius: 50px;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: var(--shadow);
        }
        
        .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.15);
            background-color: var(--primary-color);
        }
        
        /* 服务部分样式 */
        .section {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
        }
        
        .section-title h2:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 3px;
            background-color: var(--accent-color);
        }
        
        .section-title p {
            color: var(--gray-color);
            max-width: 700px;
            margin: 0 auto;
        }
        
        .services-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .service-card {
            background-color: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-align: center;
            padding: 30px;
        }
        
        .service-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .service-icon {
            width: 80px;
            height: 80px;
            background-color: rgba(52, 199, 179, 0.1);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--accent-color);
            font-size: 30px;
        }
        
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        
        .service-card p {
            color: var(--gray-color);
            margin-bottom: 20px;
        }
        
        .price {
            font-size: 1.8rem;
            color: var(--primary-color);
            font-weight: 700;
            margin: 15px 0;
        }
        
        /* 关于我们样式 */
        .about {
            background-color: var(--light-color);
        }
        
        .about-content {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 40px;
        }
        
        .about-text {
            flex: 1;
            min-width: 300px;
        }
        
        .about-text h2 {
            font-size: 2.2rem;
            margin-bottom: 20px;
            color: var(--primary-color);
        }
        
        .about-text p {
            margin-bottom: 15px;
            color: var(--gray-color);
        }
        
        .about-stats {
            flex: 1;
            display: flex;
            flex-wrap: wrap;
            gap: 20px;
            min-width: 300px;
        }
        
        .stat-box {
            flex: 1;
            min-width: 140px;
            background: white;
            padding: 20px;
            border-radius: 10px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .stat-box:hover {
            transform: translateY(-5px);
        }
        
        .stat-number {
            font-size: 2.5rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 5px;
        }
        
        .stat-text {
            color: var(--gray-color);
            font-size: 0.9rem;
        }
        
        .certificate {
            width: 100%;
            margin-top: 40px;
            text-align: center;
            animation: fadeIn 1.5s ease;
        }
        
        .certificate-img {
            max-width: 100%;
            height: auto;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
            transition: var(--transition);
        }
        
        .certificate-img:hover {
            transform: scale(1.02);
            box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
        }
        
        /* 优势部分样式 */
        .advantages-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
        }
        
        .advantage-card {
            text-align: center;
            padding: 30px 20px;
            background: white;
            border-radius: 10px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            animation: fadeInUp 1s ease;
        }
        
        .advantage-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        }
        
        .advantage-icon {
            font-size: 40px;
            color: var(--accent-color);
            margin-bottom: 20px;
        }
        
        .advantage-card h3 {
            font-size: 1.3rem;
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        
        /* 流程部分样式 */
        .process {
            background-color: var(--light-color);
        }
        
        .process-steps {
            display: flex;
            justify-content: space-between;
            position: relative;
            margin: 60px 0;
        }
        
        .process-steps:before {
            content: '';
            position: absolute;
            top: 40px;
            left: 0;
            width: 100%;
            height: 2px;
            background-color: var(--accent-color);
            z-index: 1;
        }
        
        .step {
            text-align: center;
            position: relative;
            z-index: 2;
            flex: 1;
            animation: pulse 2s infinite ease-in-out;
        }
        
        .step:nth-child(2) {
            animation-delay: 0.4s;
        }
        
        .step:nth-child(3) {
            animation-delay: 0.8s;
        }
        
        .step:nth-child(4) {
            animation-delay: 1.2s;
        }
        
        .step:nth-child(5) {
            animation-delay: 1.6s;
        }
        
        .step-icon {
            width: 80px;
            height: 80px;
            background-color: white;
            border: 2px solid var(--accent-color);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 20px;
            color: var(--accent-color);
            font-size: 30px;
            position: relative;
            box-shadow: var(--shadow);
        }
        
        .step-number {
            position: absolute;
            top: -10px;
            right: -10px;
            width: 30px;
            height: 30px;
            background-color: var(--primary-color);
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
        }
        
        .step h3 {
            font-size: 1.2rem;
            margin-bottom: 10px;
            color: var(--dark-color);
        }
        
        /* 知识库样式 */
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .knowledge-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            animation: fadeInUp 1s ease;
        }
        
        .knowledge-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .knowledge-img-container {
            height: 200px;
            width: 100%;
            overflow: hidden;
        }
        
        .knowledge-img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: var(--transition);
        }
        
        .knowledge-card:hover .knowledge-img {
            transform: scale(1.05);
        }
        
        .knowledge-content {
            padding: 20px;
        }
        
        .knowledge-content h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
            color: var(--dark-color);
        }
        
        .knowledge-content p {
            color: var(--gray-color);
            margin-bottom: 15px;
        }
        
      
        
        /* 动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(20px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }
        
        @keyframes fadeIn {
            from {
                opacity: 0;
            }
            to {
                opacity: 1;
            }
        }
        
        @keyframes pulse {
            0% {
                transform: translateY(0);
            }
            50% {
                transform: translateY(-10px);
            }
            100% {
                transform: translateY(0);
            }
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .slide-content h2 {
                font-size: 2.5rem;
            }
            
            .slide-content p {
                font-size: 1.2rem;
            }
            
            .process-steps {
                flex-direction: column;
                gap: 40px;
            }
            
            .process-steps:before {
                display: none;
            }
            
            .nav-phone {
                font-size: 16px;
            }
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                position: fixed;
                top: 70px;
                left: -100%;
                width: 100%;
                height: calc(100vh - 70px);
                background-color: white;
                flex-direction: column;
                align-items: center;
                justify-content: center;
                transition: var(--transition);
                gap: 30px;
            }
            
            .nav-menu.active {
                left: 0;
            }
            
            .nav-phone {
                display: none;
            }
            
            .mobile-phone {
                display: block;
                margin-top: 20px;
                color: var(--primary-color);
                font-weight: 700;
                font-size: 18px;
            }
            
            .hamburger {
                display: block;
                font-size: 24px;
            }
            
            .slide-content h2 {
                font-size: 2rem;
            }
            
            .section-title h2 {
                font-size: 2rem;
            }
            
            .friend-links ul {
                flex-direction: column;
                gap: 10px;
            }
        }

        @media (min-width: 769px) {
            .mobile-phone {
                display: none;
            }
        }