:root {
            --primary-color: #c62828;
            --primary-dark: #8e0000;
            --primary-light: #ff5f52;
            --secondary-color: #f5f5f5;
            --accent-color: #ffd54f;
            --text-dark: #212121;
            --text-light: #757575;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
            color: var(--text-dark);
            line-height: 1.6;
            background-color: #fafafa;
        }
        
        /* 头部样式 */
        header {
            background-color: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: sticky;
            top: 0;
            z-index: 1000;
        }
        
        .navbar-brand {
            font-weight: 700;
            font-size: 1.8rem;
            color: var(--primary-color);
        }
        
        .navbar-nav .nav-link {
            color: var(--text-dark);
            font-weight: 500;
            padding: 0.8rem 1.2rem;
            transition: all 0.3s ease;
            position: relative;
        }
        
        .navbar-nav .nav-link:hover,
        .navbar-nav .nav-link.active {
            color: var(--primary-color);
        }
        
        .navbar-nav .nav-link::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 15%;
            width: 70%;
            height: 3px;
            background: var(--primary-color);
            transform: scaleX(0);
            transition: transform 0.3s ease;
        }
        
        .navbar-nav .nav-link:hover::after,
        .navbar-nav .nav-link.active::after {
            transform: scaleX(1);
        }
        
        /* 文章标题区域 */
        .article-header {
            background: linear-gradient(rgba(198, 40, 40, 0.8), rgba(198, 40, 40, 0.8)), url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&auto=format&fit=crop&w=1350&q=80');
            background-size: cover;
            background-position: center;
            padding: 4rem 0;
            color: white;
            text-align: center;
        }
        
        .article-header h1 {
            font-size: 2.5rem;
            font-weight: 700;
            margin-bottom: 1rem;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }
        
        /* 文章元信息 */
        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
            margin-top: 1.5rem;
            font-size: 0.9rem;
        }
        
        .article-meta-item {
            display: flex;
            align-items: center;
        }
        
        .article-meta-item i {
            margin-right: 5px;
        }
        
        .article-tag {
            background-color: var(--primary-light);
            color: white;
            padding: 3px 10px;
            border-radius: 20px;
            font-size: 0.8rem;
            display: inline-block;
        }
        
        /* 文章内容区域 */
        .article-content-section {
            padding: 5rem 0;
            background-color: white;
        }
        
        .article-container {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .article-content {
            padding: 2rem;
            background-color: white;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        }
        
        .article-content p {
            margin-bottom: 1.5rem;
            font-size: 1.1rem;
            line-height: 1.8;
        }
        
        .article-content h2 {
            color: var(--primary-color);
            margin: 2rem 0 1rem;
            font-size: 1.8rem;
        }
        
        .article-content h3 {
            color: var(--text-dark);
            margin: 1.5rem 0 1rem;
            font-size: 1.4rem;
        }
        
        .article-content img {
            max-width: 100%;
            height: auto;
            border-radius: 5px;
            margin: 1.5rem 0;
        }
        
        .article-content blockquote {
            border-left: 4px solid var(--primary-color);
            padding-left: 1.5rem;
            margin: 1.5rem 0;
            color: var(--text-light);
            font-style: italic;
        }
        
        /* 相关文章 */
        .related-articles {
            padding: 4rem 0;
            background-color: var(--secondary-color);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 3.5rem;
        }
        
        .section-title h2 {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            position: relative;
            display: inline-block;
            padding-bottom: 15px;
        }
        
        .section-title h2::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background-color: var(--primary-color);
        }
        
        .related-article-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            height: 100%;
        }
        
        .related-article-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 15px 30px rgba(198, 40, 40, 0.1);
        }
        
        .related-article-img {
            height: 180px;
            overflow: hidden;
        }
        
        .related-article-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .related-article-card:hover .related-article-img img {
            transform: scale(1.05);
        }
        
        .related-article-content {
            padding: 20px;
        }
        
        .related-article-content h3 {
            margin-bottom: 10px;
            font-size: 1.2rem;
        }
        
        .related-article-content h3 a {
            color: var(--text-dark);
            text-decoration: none;
            transition: color 0.3s ease;
        }
        
        .related-article-content h3 a:hover {
            color: var(--primary-color);
        }
        
        .related-article-date {
            color: var(--text-light);
            font-size: 0.9rem;
        }
        
        /* 页脚 */
        footer {
            background-color: #1a1a1a;
            color: #ccc;
            padding: 4rem 0 2rem;
        }
        
        .footer-title {
            color: white;
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 50px;
            height: 3px;
            background-color: var(--primary-color);
        }
        
        .footer-links a {
            display: block;
            color: #aaa;
            text-decoration: none;
            margin-bottom: 10px;
            transition: color 0.3s ease;
        }
        
        .footer-links a:hover {
            color: var(--primary-light);
        }
        
        .contact-info {
            margin-bottom: 15px;
            display: flex;
        }
        
        .contact-info i {
            color: var(--primary-color);
            margin-right: 15px;
            font-size: 1.2rem;
            min-width: 25px;
        }
        
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: #333;
            color: white;
            border-radius: 50%;
            margin-right: 10px;
            transition: all 0.3s ease;
        }
        
        .social-links a:hover {
            background-color: var(--primary-color);
            transform: translateY(-5px);
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            margin-top: 30px;
            border-top: 1px solid #333;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 2.2rem;
            }
        }
        
        @media (max-width: 768px) {
            .article-header h1 {
                font-size: 1.8rem;
            }
            
            .article-meta {
                flex-direction: column;
                align-items: center;
            }
            
            .article-content {
                padding: 1.5rem;
            }
            
            .article-content p {
                font-size: 1rem;
            }
        }
        
        @media (max-width: 576px) {
            .article-header h1 {
                font-size: 1.5rem;
            }
            
            .section-title h2 {
                font-size: 1.7rem;
            }
        }