/* ===== 文章头部样式 ===== */
        .article-header {
            background: linear-gradient(135deg, var(--secondary) 0%, var(--primary) 100%);
            color: white;
            padding: 180px 0 100px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .article-header h1 {
            font-size: 4rem;
            font-weight: 900;
            margin-bottom: 30px;
            text-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2);
            max-width: 900px;
            margin-left: auto;
            margin-right: auto;
        }

        .article-meta {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 30px;
            margin-bottom: 20px;
            font-size: 1.1rem;
        }

        .article-meta span {
            display: flex;
            align-items: center;
        }

        .article-meta i {
            margin-right: 8px;
            color: var(--accent);
        }

        /* ===== 文章主体样式 ===== */
        .article-content {
            background-color: white;
            position: relative;
            overflow: hidden;
        }

        .article-body {
            max-width: 100%;
            margin: 0 auto;
        }

        /* 文章内容样式 */
        .article-body h2 {
            font-size: 2.2rem;
            color: var(--dark);
            margin: 60px 0 30px;
            padding-bottom: 15px;
            border-bottom: 3px solid var(--primary);
            position: relative;
        }

        .article-body h2::after {
            content: '';
            position: absolute;
            bottom: -3px;
            left: 0;
            width: 100px;
            height: 3px;
            background: var(--secondary);
        }

        .article-body h3 {
            font-size: 1.8rem;
            color: var(--dark);
            margin: 50px 0 25px;
            padding-left: 15px;
            border-left: 5px solid var(--primary);
        }

        .article-body h4 {
            font-size: 1.5rem;
            color: var(--dark);
            margin: 40px 0 20px;
        }

        .article-body h5 {
            font-size: 1.3rem;
            color: var(--dark);
            margin: 30px 0 15px;
        }

        .article-body p {
            font-size: 1.2rem;
            line-height: 1.8;
            margin-bottom: 25px;
            color: #444;
        }

        .article-body img {
            max-width: 100%;
            height: auto;
            display: block;
            margin: 40px auto;
            box-shadow: var(--shadow);
            border-radius: 8px;
            transition: var(--transition);
        }

        .article-body img:hover {
            transform: scale(1.02);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
        }

        .article-body blockquote {
            background: var(--light);
            border-left: 5px solid var(--primary);
            padding: 30px;
            margin: 40px 0;
            font-style: italic;
            position: relative;
        }

        .article-body blockquote::before {
            content: '"';
            font-size: 4rem;
            color: var(--primary);
            position: absolute;
            top: 10px;
            left: 20px;
            opacity: 0.3;
        }

        .article-body ul, .article-body ol {
            margin: 30px 0;
            padding-left: 30px;
        }

        .article-body li {
            margin-bottom: 15px;
            font-size: 1.2rem;
            line-height: 1.7;
        }

        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 40px 0;
            box-shadow: var(--shadow);
        }

        .article-body th, .article-body td {
            padding: 15px 20px;
            text-align: left;
            border-bottom: 1px solid rgba(0, 0, 0, 0.1);
        }

        .article-body th {
            background: var(--primary);
            color: white;
            font-weight: 700;
        }

        .article-body tr:nth-child(even) {
            background: rgba(0, 0, 0, 0.02);
        }

        /* ===== 文章导航 ===== */
        .article-navigation {
            background: var(--light);
            padding: 60px 0;
            position: relative;
            overflow: hidden;
        }

        .nav-links {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 100%;
            margin: 0 auto;
        }

        .nav-previous, .nav-next {
            flex: 1;
            display: flex;
            align-items: center;
            padding: 30px;
            background: white;
            border-radius: 0;
            box-shadow: var(--shadow);
            transition: var(--transition);
            text-decoration: none;
            color: var(--dark);
        }

        .nav-previous {
            margin-right: 20px;
            text-align: left;
        }

        .nav-next {
            margin-left: 20px;
            text-align: right;
            flex-direction: row-reverse;
        }

        .nav-previous:hover, .nav-next:hover {
            transform: translateY(-10px);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
            color: var(--primary);
        }

        .nav-icon {
            font-size: 2rem;
            color: var(--primary);
            margin: 0 20px;
        }

        .nav-content h3 {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }

        /* ===== 相关文章 ===== */
        .related-articles {
            background-color: white;
            position: relative;
            overflow: hidden;
        }

        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 50px;
        }

        .related-card {
            background: white;
            border-radius: 0;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            position: relative;
            border: 1px solid rgba(0, 0, 0, 0.05);
        }

        .related-card:hover {
            transform: translateY(-20px);
            box-shadow: 0 25px 50px rgba(0, 0, 0, 0.15);
        }

        .related-image {
            height: 250px;
            overflow: hidden;
            position: relative;
        }

        .related-image::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: var(--primary);
            opacity: 0;
            transition: var(--transition);
            z-index: 1;
        }

        .related-card:hover .related-image::before {
            opacity: 0.3;
        }

        .related-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 1s ease;
        }

        .related-card:hover .related-image img {
            transform: scale(1.1);
        }

        .related-content {
            padding: 30px;
        }

        .related-content h3 {
            font-size: 1.4rem;
            color: var(--dark);
            margin-bottom: 15px;
        }

        .related-content h3 a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        .related-content h3 a:hover {
            color: var(--primary);
        }

        .related-meta {
            display: flex;
            align-items: center;
            margin-bottom: 15px;
            font-size: 0.9rem;
            color: var(--gray);
        }

        .related-meta span {
            margin-right: 20px;
            display: flex;
            align-items: center;
        }

        .related-meta i {
            margin-right: 5px;
            color: var(--primary);
        }

        .read-more {
            display: inline-flex;
            align-items: center;
            margin-top: 20px;
            color: var(--primary);
            font-weight: 700;
            text-decoration: none;
            position: relative;
            text-transform: uppercase;
            letter-spacing: 1px;
            font-size: 0.9rem;
        }

        .read-more::after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--primary);
            transition: var(--transition);
        }

        .read-more:hover::after {
            width: 100%;
        }

        .read-more i {
            margin-left: 8px;
            transition: var(--transition);
        }

        .read-more:hover i {
            transform: translateX(5px);
        }

        /* ===== 响应式设计 ===== */
        @media (max-width: 1200px) {
            .article-header h1 {
                font-size: 3.5rem;
            }
        }

        @media (max-width: 992px) {
            .article-header h1 {
                font-size: 3rem;
            }
            
            .nav-links {
                flex-direction: column;
                gap: 30px;
            }
            
            .nav-previous, .nav-next {
                margin: 0;
                width: 100%;
            }
            
            .related-grid {
                grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            }
        }

        @media (max-width: 768px) {
            .article-header {
                padding: 150px 0 80px;
            }
            
            .article-header h1 {
                font-size: 2.5rem;
            }
            
            .article-meta {
                flex-direction: column;
                gap: 15px;
            }
            
            .article-body h2 {
                font-size: 1.8rem;
            }
            
            .article-body h3 {
                font-size: 1.5rem;
            }
            
            .article-body p {
                font-size: 1.1rem;
            }
            
            .related-grid {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 576px) {
            .article-header h1 {
                font-size: 2.2rem;
            }
            
            .article-body h2 {
                font-size: 1.6rem;
            }
            
            .article-body h3 {
                font-size: 1.3rem;
            }
        }