/* 文章标题区域 */
        .article-header {
            margin-top: 100px;
            padding: 60px 0;
            background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
            text-align: center;
        }
        
        .article-header h1 {
            font-size: 42px;
            color: var(--secondary);
            margin-bottom: 20px;
            font-weight: 700;
            line-height: 1.3;
        }
        
        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 30px;
            color: var(--gray);
            font-size: 16px;
        }
        
        .article-meta span {
            display: flex;
            align-items: center;
        }
        
        .article-meta i {
            margin-right: 8px;
            color: var(--primary);
        }
        
        /* 文章内容区域 */
        .article-content {
            padding: 60px 0;
            max-width: 900px;
            margin: 0 auto;
        }
        
        .article-body {
            font-size: 18px;
            line-height: 1.8;
        }
        
        .article-body p {
            margin-bottom: 25px;
            color: var(--dark);
        }
        
        .article-body h2 {
            font-size: 28px;
            margin: 50px 0 25px;
            color: var(--secondary);
            font-weight: 600;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-gray);
        }
        
        .article-body h3 {
            font-size: 22px;
            margin: 40px 0 20px;
            color: var(--secondary);
            font-weight: 600;
        }
        
        .article-body ul, .article-body ol {
            margin: 20px 0;
            padding-left: 30px;
        }
        
        .article-body li {
            margin-bottom: 10px;
        }
        
        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: 12px;
            margin: 30px 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .article-body img:hover {
            transform: scale(1.01);
        }
        
        .article-body blockquote {
            background-color: var(--light);
            border-left: 5px solid var(--primary);
            padding: 25px;
            margin: 30px 0;
            border-radius: 8px;
            font-style: italic;
            color: var(--secondary);
            position: relative;
        }
        
        .article-body blockquote::before {
            content: """;
            font-size: 60px;
            color: var(--primary);
            opacity: 0.2;
            position: absolute;
            top: -10px;
            left: 10px;
            font-family: Georgia, serif;
        }
        
        /* 免费政策提示框 */
        .policy-notice {
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: white;
            padding: 40px;
            border-radius: 12px;
            margin: 50px 0;
            text-align: center;
            box-shadow: 0 10px 30px rgba(26, 109, 252, 0.3);
            position: relative;
            overflow: hidden;
        }
        
        .policy-notice::before {
            content: '';
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            animation: pulse 8s infinite linear;
        }
        
        @keyframes pulse {
            0% {
                transform: rotate(0deg);
            }
            100% {
                transform: rotate(360deg);
            }
        }
        
        .policy-notice h3 {
            font-size: 26px;
            margin-bottom: 15px;
            position: relative;
            z-index: 1;
        }
        
        .policy-notice p {
            font-size: 18px;
            margin-bottom: 25px;
            position: relative;
            z-index: 1;
        }
        
        .policy-notice .btn {
            display: inline-block;
            padding: 14px 32px;
            background-color: white;
            color: var(--primary);
            border-radius: 30px;
            font-weight: 500;
            transition: var(--transition);
            box-shadow: 0 4px 15px rgba(255, 255, 255, 0.3);
            position: relative;
            z-index: 1;
        }
        
        .policy-notice .btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 25px rgba(255, 255, 255, 0.4);
            background-color: var(--light);
        }
        
        /* 上一篇/下一篇导航 */
        .article-navigation {
            display: flex;
            justify-content: space-between;
            margin: 60px 0;
            padding-top: 40px;
            border-top: 1px solid var(--light-gray);
        }
        
        .prev-article, .next-article {
            display: flex;
            align-items: center;
            padding: 20px;
            background-color: white;
            border-radius: 12px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            max-width: 45%;
        }
        
        .prev-article:hover, .next-article:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
            color: var(--primary);
        }
        
        .prev-article {
            text-align: left;
        }
        
        .next-article {
            text-align: right;
        }
        
        .nav-icon {
            font-size: 24px;
            color: var(--primary);
            margin: 0 15px;
        }
        
        .nav-content h4 {
            font-size: 16px;
            color: var(--gray);
            margin-bottom: 5px;
            font-weight: normal;
        }
        
        .nav-content h3 {
            font-size: 18px;
            font-weight: 600;
            line-height: 1.4;
        }
        
        /* 相关文章推荐 */
        .related-articles {
            padding: 60px 0;
            background-color: var(--light);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 36px;
            color: var(--secondary);
            margin-bottom: 20px;
            position: relative;
            display: inline-block;
            font-weight: 700;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: -15px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--accent));
            border-radius: 2px;
        }
        
        .knowledge-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .knowledge-card {
            background-color: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }
        
        .knowledge-card:hover {
            transform: translateY(-15px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
        }
        
        .knowledge-image {
            height: 200px;
            overflow: hidden;
            position: relative;
        }
        
        .knowledge-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.7s ease;
        }
        
        .knowledge-card:hover .knowledge-image img {
            transform: scale(1.1);
        }
        
        .knowledge-content {
            padding: 25px;
        }
        
        .knowledge-content h3 {
            font-size: 18px;
            margin-bottom: 15px;
            color: var(--secondary);
            font-weight: 600;
            line-height: 1.4;
        }
        
        .knowledge-content a {
            text-decoration: none;
            color: var(--secondary);
        }
        
        .knowledge-content p {
            color: var(--gray);
            margin-bottom: 15px;
            font-size: 14px;
            line-height: 1.6;
        }
        
        .knowledge-meta {
            display: flex;
            justify-content: space-between;
            color: #999;
            font-size: 13px;
        }
        
  
        /* 响应式设计 */
        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 36px;
            }
            
            .article-navigation {
                flex-direction: column;
                gap: 20px;
            }
            
            .prev-article, .next-article {
                max-width: 100%;
            }
        }
        
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
            }
            
            nav ul {
                margin: 15px 0;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            nav li {
                margin: 0 10px 10px;
            }
            
            .phone-number {
                margin-top: 10px;
            }
            
            .article-header {
                margin-top: 120px;
                padding: 40px 0;
            }
            
            .article-header h1 {
                font-size: 30px;
            }
            
            .article-meta {
                flex-direction: column;
                gap: 10px;
            }
            
            .policy-notice {
                padding: 30px 20px;
            }
            
            .policy-notice h3 {
                font-size: 22px;
            }
            
            .section-title h2 {
                font-size: 30px;
            }
            
            .knowledge-grid {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 480px) {
            .article-header h1 {
                font-size: 26px;
            }
            
            .article-body {
                font-size: 16px;
            }
            
            .article-body h2 {
                font-size: 24px;
            }
            
            .article-body h3 {
                font-size: 20px;
            }
        }