/* 全局样式 */
        :root {
            --primary: #4a6fa5;
            --secondary: #166088;
            --accent: #4fc3f7;
            --light: #f8f9fa;
            --dark: #343a40;
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Helvetica Neue', Arial, sans-serif;
        }
        body {
            background-color: var(--light);
            color: #333;
            line-height: 1.6;
        }
        
        a {
            text-decoration: none;
            color: #2c7be5;
        }
        
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .btn {
            display: inline-block;
            padding: 12px 24px;
            background-color: #2c7be5;
            color: white;
            border-radius: 4px;
            font-weight: 500;
            transition: all 0.3s ease;
        }
        
        .btn:hover {
            background-color: #1a68d1;
            transform: translateY(-2px);
        }
        
        .btn-secondary {
            background-color: #6c757d;
        }
        
        .btn-secondary:hover {
            background-color: #5a6268;
        }
        
        /* 导航栏 */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo {
            font-size: 24px;
            font-weight: 700;
            color: #2c7be5;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 30px;
        }
        
        .nav-links a {
            color: #333;
            font-weight: 500;
        }
        
        .nav-links a:hover {
            color: #2c7be5;
        }
        
        /* 英雄区域 */
        .hero {
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            padding: 100px 0;
            text-align: center;
        }
        
        .hero h1 {
            font-size: 48px;
            margin-bottom: 20px;
            color: #2c3e50;
        }
        
        .hero p {
            font-size: 20px;
            max-width: 700px;
            margin: 0 auto 40px;
            color: #4a5568;
        }
        
        .btn-group {
            margin-top: 30px;
        }
        
        .btn-group .btn {
            margin: 0 10px;
        }
        
        /* 特性部分 */
        .features {
            padding: 80px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 60px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: #2c3e50;
            margin-bottom: 15px;
        }
        
        .section-title p {
            color: #718096;
            max-width: 700px;
            margin: 0 auto;
        }
        
        .features-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .feature-card {
            background: white;
            border-radius: 8px;
            padding: 15px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .feature-icon {
            font-size: 40px;
            color: #2c7be5;
            margin-bottom: 20px;
        }
        
        .feature-card h3 {
            font-size: 22px;
            margin-bottom: 15px;
            color: #2c3e50;
        }
        
        /* 图片轮播组件 */
        .carousel-section {
            padding: 80px 0;
            background-color: #f8f9fa;
        }
        
        .carousel {
            position: relative;
            max-width: 900px;
            margin: 0 auto;
            overflow: hidden;
            border-radius: 8px;
            box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        }
        
        .carousel-inner {
            display: flex;
            transition: transform 0.5s ease;
        }
        
        .carousel-item {
            min-width: 100%;
            position: relative;
        }
        
        .carousel-item img {
            width: 100%;
            display: block;
            height: 540px;
            object-fit: cover;
        }
        
        .carousel-caption {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: rgba(44, 44, 44, 0.5);
            color: white;
            padding: 5px;
            text-align: center;
        }
        
        .carousel-caption h3 {
            margin-bottom: 5px;
            font-size: 20px;
        }
        
        .carousel-controls {
            display: flex;
            justify-content: center;
            align-items: center;
            padding: 5px;
            background: white;
        }
        
        .carousel-arrow {
            font-size: 24px;
            cursor: pointer;
            padding: 10px;
            color: #2c7be5;
            user-select: none;
        }
        
        .carousel-indicators {
            display: flex;
            justify-content: center;
            margin: 0 20px;
        }
        
        .indicator {
            width: 12px;
            height: 12px;
            border-radius: 50%;
            background-color: #ddd;
            margin: 0 5px;
            cursor: pointer;
            transition: background-color 0.3s ease;
        }
        
        .indicator.active {
            background-color: #2c7be5;
        }
        
        /* 定价部分 */
        .pricing {
            padding: 80px 0;
            background-color: white;
        }
        
        .pricing-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-top: 50px;
        }
        
        .pricing-card {
            background: white;
            border-radius: 8px;
            padding: 40px 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            text-align: center;
            border: 1px solid #eee;
            transition: all 0.3s ease;
        }
        
        .pricing-card.popular {
            border: 1px solid #2c7be5;
            position: relative;
            transform: scale(1.05);
        }
        
        .popular-badge {
            position: absolute;
            top: -12px;
            right: 20px;
            background-color: #2c7be5;
            color: white;
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: bold;
        }
        
        .pricing-card h3 {
            font-size: 22px;
            margin-bottom: 20px;
            color: #2c3e50;
        }
        
        .price {
            font-size: 48px;
            font-weight: 700;
            color: #2c7be5;
            margin-bottom: 20px;
        }
        
        .price span {
            font-size: 16px;
            font-weight: normal;
            color: #718096;
        }
        
        .pricing-features {
            list-style: none;
            margin-bottom: 30px;
        }
        
        .pricing-features li {
            padding: 10px 0;
            border-bottom: 1px solid #eee;
        }
        
        /* 评价部分 */
        .testimonials {
            padding: 80px 0;
            background-color: #f8f9fa;
        }
        
        .testimonial-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        
        .testimonial-card {
            background: white;
            border-radius: 8px;
            padding: 30px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .testimonial-text {
            font-style: italic;
            margin-bottom: 20px;
            color: #4a5568;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
        }
        
        .author-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            margin-right: 15px;
            object-fit: cover;
        }
        
        .author-info h4 {
            font-size: 18px;
            margin-bottom: 5px;
            color: #2c3e50;
        }
        
        .author-info p {
            color: #718096;
            font-size: 14px;
        }
        
        /* 常见问题 */
        .faq {
            padding: 80px 0;
            background-color: white;
        }
        
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-item {
            margin-bottom: 20px;
            border: 1px solid #eee;
            border-radius: 8px;
            overflow: hidden;
        }
        
        .faq-question {
            padding: 20px;
            background-color: #f8f9fa;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-weight: 500;
        }
        
        .faq-answer {
            padding: 20px;
            display: none;
        }
        
        .faq-item.active .faq-answer {
            display: block;
        }
        
        /* 页脚 */
        footer {
            background-color: #2c3e50;
            color: white;
            padding: 60px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 40px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            font-size: 18px;
            margin-bottom: 20px;
            color: #fff;
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 10px;
        }
        
        .footer-links a {
            color: #a0aec0;
            transition: color 0.3s ease;
        }
        
        .footer-links a:hover {
            color: white;
        }
        
        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #4a5568;
            color: #a0aec0;
            font-size: 14px;
        }

        /* 数字角标 */
        /* 基础角标样式 */
        .badge {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 18px;
            height: 18px;
            padding: 0 4px;
            margin-left: 5px;
            border-radius: 9px;
            background: linear-gradient(135deg, #ff5e62, #ff9966);
            color: white;
            font-size: 14px;
            font-weight: bold;
            text-align: center;
            line-height: 1;
            box-shadow: 0 2px 4px rgba(0,0,0,0.2);
            position: relative;
            vertical-align: middle;
            /* animation: pulse 1.5s infinite; */
        }
        /* 不同颜色变体 */
        .badge-primary {
            background: linear-gradient(135deg, #4776E6, #8E54E9);
        }
        .badge-success {
            background: linear-gradient(135deg, #11998e, #38ef7d);
        }
        /* 悬浮动画 */
        .badge:hover {
            transform: scale(1.1);
            transition: all 0.3s ease;
        }
        /* 悬停时的提示文本 */
        .badge .tooltiptext {
            visibility: hidden;
            width: 170px;
            background-color: #555;
            color: #fff;
            text-align: center;
            border-radius: 6px;
            padding: 5px;
            position: absolute;
            z-index: 1;
            bottom: 125%;
            left: 50%;
            margin-left: -60px;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .badge:hover .tooltiptext {
            visibility: visible;
            opacity: 1;
        }
        /* 呼吸动画 */
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .features-grid,
            .pricing-grid,
            .testimonial-grid,
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
            }
            
            .hero h1 {
                font-size: 36px;
            }
            
            .hero p {
                font-size: 18px;
            }
            
            .features-grid,
            .pricing-grid,
            .testimonial-grid,
            .footer-content {
                grid-template-columns: 1fr;
            }
            
            .pricing-card.popular {
                transform: none;
            }
            
            .carousel-item img {
                height: 350px;
            }
        }