/* ===== 基础变量与重置样式 ===== */
        :root {
            --primary-color: #3498db;
            --secondary-color: #2980b9;
            --accent-color: #e74c3c;
            --light-color: #f8f9fa;
            --dark-color: #343a40;
            --text-color: #333;
            --border-radius: 4px;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            line-height: 1.6;
            color: var(--text-color);
            background-color: #f5f7fa;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }
        
        /* ===== 通用布局样式 ===== */
        /* Header Styles */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0,0,0,0.1);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        
        .header-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 15px 0;
        }
        
        .logo {
            display: flex;
            align-items: center;
        }
        
        .logo h1 {
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        
        .logo span {
            color: var(--accent-color);
        }
        
        nav ul {
            display: flex;
            list-style: none;
        }
        
        nav ul li {
            margin-left: 20px;
        }
        
        nav ul li a {
            text-decoration: none;
            color: var(--dark-color);
            font-weight: 500;
            transition: color 0.3s;
        }
        
        nav ul li a:hover {
            color: var(--primary-color);
        }
        
        .mobile-menu {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            color: white;
            padding: 80px 0;
            text-align: center;
        }
        
        .hero h2 {
            font-size: 2.5rem;
            margin-bottom: 20px;
        }
        
        .hero p {
            font-size: 1.2rem;
            max-width: 700px;
            margin: 0 auto 30px;
        }
        
        .btn {
            display: inline-block;
            background-color: white;
            color: var(--primary-color);
            padding: 12px 30px;
            border-radius: var(--border-radius);
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
        }
        
        .btn:hover {
            background-color: var(--light-color);
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
        }
        
        /* Section通用样式 */
        section {
            padding: 60px 0;
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title h2 {
            font-size: 2rem;
            color: var(--dark-color);
            position: relative;
            display: inline-block;
            padding-bottom: 10px;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 70px;
            height: 3px;
            background-color: var(--primary-color);
        }
        
        /* ===== 通用组件样式 ===== */
        /* 卡片样式 */
        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background-color: var(--light-color);
            border-radius: var(--border-radius);
            padding: 30px;
            text-align: center;
            transition: transform 0.3s;
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
        }
        
        .feature-icon {
            font-size: 2.5rem;
            color: var(--primary-color);
            margin-bottom: 20px;
        }
        
        .feature-card h3 {
            margin-bottom: 15px;
            color: var(--dark-color);
        }
        
        /* 文章卡片样式 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .article-card {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: transform 0.3s;
        }
        
        .article-card:hover {
            transform: translateY(-5px);
        }
        
        .article-img {
            height: 200px;
            background-color: #eee;
            background-size: cover;
            background-position: center;
        }
        
        .article-content {
            padding: 20px;
        }
        
        .article-content h3 {
            margin-bottom: 10px;
        }
        
        .article-meta {
            color: #777;
            font-size: 0.9rem;
            margin-bottom: 15px;
        }
        
        .read-more {
            color: var(--primary-color);
            text-decoration: none;
            font-weight: 500;
        }
        
        /* FAQ样式 */
        .faq-item {
            background-color: white;
            border-radius: var(--border-radius);
            margin-bottom: 15px;
            overflow: hidden;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        
        .faq-question {
            padding: 20px;
            background-color: var(--light-color);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.3s ease;
        }
        
        .faq-answer.active {
            padding: 20px;
            max-height: 500px;
        }
        
        /* 指南样式 */
        .guide-container {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .guide-container h3 {
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        .step {
            display: flex;
            margin-bottom: 30px;
            align-items: flex-start;
        }
        
        .step-number {
            background-color: var(--primary-color);
            color: white;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: bold;
            margin-right: 20px;
            flex-shrink: 0;
        }
        
        .step-content {
            flex: 1;
        }
        
        .step-content h4 {
            margin-bottom: 10px;
            color: var(--dark-color);
        }
        
        .step-image {
            background-color: #f0f0f0;
            height: 200px;
            border-radius: var(--border-radius);
            margin: 15px 0;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #777;
            font-style: italic;
        }
        
        /* 平台选项卡样式 */
        .platform-tabs {
            display: flex;
            margin-bottom: 20px;
            border-bottom: 1px solid #ddd;
        }
        
        .platform-tab {
            padding: 10px 20px;
            cursor: pointer;
            border-bottom: 3px solid transparent;
            transition: all 0.3s;
        }
        
        .platform-tab.active {
            border-bottom: 3px solid var(--primary-color);
            color: var(--primary-color);
            font-weight: 600;
        }
        
        .platform-content {
            display: none;
        }
        
        .platform-content.active {
            display: block;
        }
        
        /* 问题分类样式 */
        .faq-categories {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-bottom: 40px;
        }
        
        .category-btn {
            background-color: white;
            border: 2px solid var(--primary-color);
            color: var(--primary-color);
            padding: 10px 20px;
            border-radius: 30px;
            cursor: pointer;
            font-weight: 500;
            transition: all 0.3s;
        }
        
        .category-btn.active, .category-btn:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .faq-category {
            margin-bottom: 50px;
        }
        
        .faq-category h3 {
            color: var(--primary-color);
            margin-bottom: 20px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        /* 搜索框样式 */
        .search-box {
            max-width: 500px;
            margin: 0 auto 40px;
            position: relative;
        }
        
        .search-box input {
            width: 100%;
            padding: 12px 20px;
            border: 1px solid #ddd;
            border-radius: 30px;
            font-size: 1rem;
            box-shadow: 0 2px 10px rgba(0,0,0,0.05);
        }
        
        .search-box input:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        
        .search-icon {
            position: absolute;
            right: 15px;
            top: 50%;
            transform: translateY(-50%);
            color: #777;
        }
        
        /* 文章详情页样式 */
        .breadcrumb {
            padding: 15px 0;
            background-color: white;
            margin-bottom: 20px;
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
        }
        
        .breadcrumb .container {
            display: flex;
            align-items: center;
        }
        
        .breadcrumb a {
            color: var(--primary-color);
            text-decoration: none;
        }
        
        .breadcrumb span {
            margin: 0 10px;
            color: #777;
        }
        
        .breadcrumb .current {
            color: var(--dark-color);
        }
        
        .article-section {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 30px;
        }
        
        .article-header {
            padding: 40px 40px 20px;
            border-bottom: 1px solid #eee;
        }
        
        .article-title {
            font-size: 2.2rem;
            margin-bottom: 15px;
            color: var(--dark-color);
            line-height: 1.3;
        }
        
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            margin-bottom: 20px;
            color: #777;
        }
        
        .meta-item {
            display: flex;
            align-items: center;
            margin-right: 20px;
            margin-bottom: 10px;
        }
        
        .meta-item i {
            margin-right: 5px;
        }
        
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            margin-top: 10px;
        }
        
        .tag {
            background-color: var(--light-color);
            color: var(--primary-color);
            padding: 5px 10px;
            border-radius: 20px;
            font-size: 0.85rem;
            margin-right: 10px;
            margin-bottom: 10px;
        }
        
        .article-image {
            height: 400px;
            background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.2rem;
        }
        
        .article-content {
            padding: 40px;
        }
        
        .article-content h2 {
            color: var(--dark-color);
            margin: 30px 0 15px;
            padding-bottom: 10px;
            border-bottom: 1px solid #eee;
        }
        
        .article-content h3 {
            color: var(--dark-color);
            margin: 25px 0 15px;
        }
        
        .article-content p {
            margin-bottom: 20px;
        }
        
        .article-content ul, .article-content ol {
            margin-left: 20px;
            margin-bottom: 20px;
        }
        
        .article-content li {
            margin-bottom: 8px;
        }
        
        .article-footer {
            padding: 20px 40px;
            border-top: 1px solid #eee;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        
        .share-buttons {
            display: flex;
        }
        
        .share-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: var(--light-color);
            color: var(--dark-color);
            margin-left: 10px;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .share-btn:hover {
            background-color: var(--primary-color);
            color: white;
        }
        
        /* 评论区域样式 */
        .comments-section {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 40px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            margin-bottom: 40px;
        }
        
        .comments-title {
            margin-bottom: 30px;
            color: var(--dark-color);
        }
        
        .comment-form {
            margin-bottom: 40px;
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
        }
        
        .form-control {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: var(--border-radius);
            font-size: 1rem;
            transition: border-color 0.3s;
        }
        
        .form-control:focus {
            outline: none;
            border-color: var(--primary-color);
        }
        
        textarea.form-control {
            min-height: 150px;
            resize: vertical;
        }
        
        .submit-btn {
            background-color: var(--primary-color);
            color: white;
            border: none;
            padding: 12px 30px;
            border-radius: var(--border-radius);
            cursor: pointer;
            font-weight: 500;
            transition: background-color 0.3s;
        }
        
        .submit-btn:hover {
            background-color: var(--secondary-color);
        }
        
        .comment {
            padding: 20px 0;
            border-bottom: 1px solid #eee;
        }
        
        .comment:last-child {
            border-bottom: none;
        }
        
        .comment-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: 10px;
        }
        
        .comment-author {
            font-weight: 600;
            color: var(--dark-color);
        }
        
        .comment-date {
            color: #777;
            font-size: 0.9rem;
        }
        
        .comment-content {
            line-height: 1.6;
        }
        
        /* 故障排除列表样式 */
        .troubleshooting-list {
            list-style-type: none;
        }
        
        .troubleshooting-list li {
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }
        
        .troubleshooting-list h4 {
            color: var(--dark-color);
            margin-bottom: 5px;
        }
        
        /* 技术细节样式 */
        .tech-details {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
        }
        
        .tech-details h3 {
            color: var(--primary-color);
            margin-bottom: 15px;
        }
        
        .protocol-comparison {
            overflow-x: auto;
        }
        
        table {
            width: 100%;
            border-collapse: collapse;
            margin: 20px 0;
        }
        
        th, td {
            padding: 12px 15px;
            text-align: left;
            border-bottom: 1px solid #ddd;
        }
        
        th {
            background-color: var(--light-color);
            color: var(--dark-color);
        }
        
        tr:hover {
            background-color: #f1f9ff;
        }
        
        /* ===== 通用提示样式 ===== */
        .highlight {
            background-color: #e8f4ff;
            padding: 20px;
            border-left: 4px solid var(--primary-color);
            margin: 20px 0;
            border-radius: var(--border-radius);
        }
        
        .quote {
            background-color: #f9f9f9;
            border-left: 4px solid #ddd;
            padding: 20px;
            margin: 20px 0;
            font-style: italic;
        }
        
        .note {
            background-color: #e8f4ff;
            padding: 15px;
            border-left: 4px solid var(--primary-color);
            margin: 15px 0;
            border-radius: var(--border-radius);
        }
        
        .warning {
            background-color: #fff8e1;
            padding: 15px;
            border-left: 4px solid #ffc107;
            margin: 15px 0;
            border-radius: var(--border-radius);
        }
        
        .tip {
            background-color: #e8f5e9;
            padding: 15px;
            border-left: 4px solid #4caf50;
            margin: 15px 0;
            border-radius: var(--border-radius);
        }
        
        .compliance-notice {
            background-color: #fff8e1;
            border-left: 4px solid #ffc107;
            padding: 20px;
            margin: 30px 0;
            border-radius: var(--border-radius);
        }
        
        .compliance-notice h3 {
            color: #ff9800;
            margin-bottom: 10px;
        }
        
        /* ===== Footer样式 ===== */
        footer {
            background-color: var(--dark-color);
            color: white;
            padding: 60px 0 20px;
        }
        
        .footer-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 30px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            margin-bottom: 20px;
            font-size: 1.2rem;
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 10px;
        }
        
        .footer-column ul li a {
            color: #ddd;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .footer-column ul li a:hover {
            color: white;
        }
        
        .copyright {
            text-align: center;
            padding-top: 20px;
            border-top: 1px solid rgba(255,255,255,0.1);
            font-size: 0.9rem;
            color: #aaa;
        }
        
        /* ===== 响应式样式 ===== */
        @media (max-width: 768px) {
            .header-container {
                flex-direction: column;
                text-align: center;
            }
            
            nav ul {
                margin-top: 15px;
                flex-wrap: wrap;
                justify-content: center;
            }
            
            nav ul li {
                margin: 5px 10px;
            }
            
            .hero h2 {
                font-size: 2rem;
            }
            
            .hero p {
                font-size: 1rem;
            }
            
            .section-title h2 {
                font-size: 1.8rem;
            }
            
            .article-title {
                font-size: 1.8rem;
            }
            
            .article-header, .article-content, .article-footer {
                padding: 30px 20px;
            }
            
            .article-image {
                height: 250px;
            }
            
            .comments-section {
                padding: 30px 20px;
            }
            
            .step {
                flex-direction: column;
            }
            
            .step-number {
                margin-right: 0;
                margin-bottom: 10px;
            }
        }
        
        @media (max-width: 576px) {
            .mobile-menu {
                display: block;
            }
            
            nav {
                display: none;
                width: 100%;
                margin-top: 15px;
            }
            
            nav.active {
                display: block;
            }
            
            nav ul {
                flex-direction: column;
            }
            
            nav ul li {
                margin: 10px 0;
            }
            
            .article-footer {
                flex-direction: column;
                align-items: flex-start;
            }
            
            .share-buttons {
                margin-top: 15px;
            }
            
            .faq-categories {
                flex-direction: column;
                align-items: center;
            }
            
            .category-btn {
                width: 80%;
                text-align: center;
            }
            
            .platform-tabs {
                flex-direction: column;
            }
            
            .platform-tab {
                border-bottom: 1px solid #ddd;
                border-left: 3px solid transparent;
            }
            
            .platform-tab.active {
                border-bottom: 1px solid #ddd;
                border-left: 3px solid var(--primary-color);
            }
        }