:root {
            --primary: #1a5fb4;
            --primary-dark: #0d4a9c;
            --primary-light: #4a90e2;
            --secondary: #26a269;
            --dark: #1a1a1a;
            --dark-medium: #2d2d2d;
            --light: #f8f9fa;
            --light-gray: #e9ecef;
            --medium-gray: #6c757d;
            --border-radius: 8px;
            --shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            --shadow-hover: 0 10px 25px rgba(0, 0, 0, 0.15);
            --transition: all 0.3s ease;
            --gradient-primary: linear-gradient(135deg, var(--primary), var(--secondary));
        }
      a {
    text-decoration: none;
    color: inherit;
}

a:hover {
    text-decoration: none;
    color: inherit;
}
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Helvetica Neue', 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', sans-serif;
            line-height: 1.7;
            color: #333;
            background-color: #fff;
            overflow-x: hidden;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .section {
            padding: 80px 0;
        }

        .top-bar {
            background: var(--dark);
            color: white;
            padding: 8px 0;
            font-size: 0.9rem;
        }
        
        .top-bar-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
        }
        
        .top-bar-keywords {
            display: flex;
            flex-wrap: wrap;
            gap: 15px;
        }
        
        .top-keyword {
            color: #ddd;
            text-decoration: none;
            font-size: 0.85rem;
            transition: var(--transition);
        }
        
        .top-keyword:hover {
            color: var(--primary-light);
        }

        .header {
            position: sticky;
            top: 0;
            z-index: 1000;
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
            transition: var(--transition);
        }
        
        .header.scrolled {
            padding: 5px 0;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }
        
        .logo-area {
            display: flex;
            align-items: center;
            gap: 15px;
            text-decoration: none;
        }
        
        .logo-icon {
            width: 48px;
            height: 48px;
            background: var(--gradient-primary);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 1.5rem;
        }
        
        .logo-text {
            display: flex;
            flex-direction: column;
        }
        
        .logo-main {
            font-size: 1.8rem;
            font-weight: 800;
            color: var(--dark);
            line-height: 1.2;
        }
        
        .logo-sub {
            font-size: 0.85rem;
            color: var(--medium-gray);
            letter-spacing: 1px;
        }
        
        .logo-highlight {
            color: var(--primary);
        }

        .nav-menu {
            display: flex;
            list-style: none;
            gap: 35px;
        }
        
        .nav-item {
            position: relative;
        }
        
        .nav-link {
            text-decoration: none;
            color: var(--dark);
            font-weight: 600;
            font-size: 1rem;
            padding: 5px 0;
            position: relative;
            transition: var(--transition);
        }
        
        .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background: var(--gradient-primary);
            transition: var(--transition);
        }
        
        .nav-link:hover {
            color: var(--primary);
        }
        
        .nav-link:hover:after {
            width: 100%;
        }
        
        .nav-link.active {
            color: var(--primary);
        }
        
        .nav-link.active:after {
            width: 100%;
        }

        .dropdown {
            position: relative;
        }
        
        .dropdown-content {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 200px;
            background-color: white;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
            z-index: 100;
        }
        
        .dropdown:hover .dropdown-content {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }
        
        .dropdown-content a {
            display: block;
            padding: 12px 20px;
            color: var(--dark);
            text-decoration: none;
            border-bottom: 1px solid var(--light-gray);
            transition: var(--transition);
        }
        
        .dropdown-content a:hover {
            background-color: var(--light);
            color: var(--primary);
            padding-left: 25px;
        }

        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--dark);
            cursor: pointer;
        }

        .breadcrumb-wrapper {
            padding: 30px 0 20px;
            background-color: #f9f9f9;
        }
        
        .breadcrumb {
            display: flex;
            align-items: center;
            color: var(--medium-gray);
            font-size: 0.95rem;
            flex-wrap: wrap;
        }
        
        .breadcrumb a {
            color: var(--primary);
            text-decoration: none;
            transition: var(--transition);
        }
        
        .breadcrumb a:hover {
            text-decoration: underline;
        }
        
        .breadcrumb i {
            margin: 0 10px;
            font-size: 0.8rem;
            color: #aaa;
        }

        .article-main {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 40px;
            padding: 40px 0 80px;
        }

        .article-content-area {
            background-color: white;
            padding: 40px;
            border-radius: var(--border-radius);
            box-shadow: var(--shadow);
        }

        .article-header {
            margin-bottom: 30px;
            padding-bottom: 20px;
            border-bottom: 1px solid var(--light-gray);
        }
        
        .article-title {
            font-size: 2.2rem;
            font-weight: 800;
            line-height: 1.3;
            color: var(--dark);
            margin-bottom: 20px;
        }
        
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            color: var(--medium-gray);
            font-size: 0.95rem;
        }
        
        .meta-item {
            display: flex;
            align-items: center;
            gap: 8px;
        }
        
        .meta-item i {
            color: var(--primary);
        }

        .article-body {
            line-height: 1.8;
            color: #444;
            font-size: 1.05rem;
        }
        
        .article-body h2 {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--dark);
            margin: 35px 0 20px;
            padding-bottom: 10px;
            border-bottom: 2px solid var(--light-gray);
        }
        
        .article-body h3 {
            font-size: 1.5rem;
            font-weight: 600;
            color: var(--dark);
            margin: 30px 0 15px;
        }
        
        .article-body p {
            margin-bottom: 20px;
            text-align: justify;
        }
        
        .article-body ul, .article-body ol {
            margin-bottom: 20px;
            padding-left: 30px;
        }
        
        .article-body li {
            margin-bottom: 10px;
        }
        
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            padding: 15px 20px;
            background-color: var(--light);
            margin: 25px 0;
            font-style: italic;
            color: var(--dark-medium);
            border-radius: 0 var(--border-radius) var(--border-radius) 0;
        }
        
        .article-body code {
            background-color: var(--light);
            padding: 2px 6px;
            border-radius: 4px;
            font-family: 'Courier New', monospace;
            font-size: 0.95rem;
            color: var(--primary-dark);
        }
        
        .article-body pre {
            background-color: var(--dark);
            color: #f8f8f2;
            padding: 20px;
            border-radius: var(--border-radius);
            overflow-x: auto;
            margin: 25px 0;
            font-family: 'Courier New', monospace;
            font-size: 0.95rem;
            line-height: 1.5;
        }
        
        .article-body img {
            max-width: 100%;
            height: auto;
            border-radius: var(--border-radius);
            margin: 25px 0;
            box-shadow: var(--shadow);
        }
        
        .article-body table {
            width: 100%;
            border-collapse: collapse;
            margin: 25px 0;
            box-shadow: var(--shadow);
            border-radius: var(--border-radius);
            overflow: hidden;
        }
        
        .article-body th {
            background-color: var(--primary);
            color: white;
            font-weight: 600;
            padding: 15px;
            text-align: left;
        }
        
        .article-body td {
            padding: 15px;
            border-bottom: 1px solid var(--light-gray);
        }
        
        .article-body tr:nth-child(even) {
            background-color: var(--light);
        }
        
        .article-tags {
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid var(--light-gray);
        }
        
        .tags-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 15px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .tags-title i {
            color: var(--primary);
        }
        
        .tags-list {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }
        
        .tag {
            background-color: var(--light);
            color: var(--primary);
            padding: 8px 16px;
            border-radius: 30px;
            font-size: 0.9rem;
            text-decoration: none;
            transition: var(--transition);
            border: 1px solid var(--light-gray);
        }
        
        .tag:hover {
            background-color: var(--primary);
            color: white;
            border-color: var(--primary);
        }

        .article-navigation {
            display: flex;
            justify-content: space-between;
            margin-top: 50px;
            padding-top: 30px;
            border-top: 1px solid var(--light-gray);
        }
        
        .nav-link-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 15px 20px;
            background-color: var(--light);
            border-radius: var(--border-radius);
            text-decoration: none;
            color: var(--dark);
            transition: var(--transition);
            max-width: 45%;
        }
        
        .nav-link-item:hover {
            background-color: var(--primary);
            color: white;
            transform: translateY(-3px);
            box-shadow: var(--shadow-hover);
        }
        
        .nav-link-item:hover .nav-arrow {
            color: white;
        }
        
        .nav-arrow {
            font-size: 1.2rem;
            color: var(--primary);
            transition: var(--transition);
        }
        
        .nav-text {
            display: flex;
            flex-direction: column;
        }
        
        .nav-label {
            font-size: 0.85rem;
            color: var(--medium-gray);
            margin-bottom: 5px;
        }
        
        .nav-link-item:hover .nav-label {
            color: rgba(255, 255, 255, 0.9);
        }
        
        .nav-title {
            font-weight: 600;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 30px;
        }
        
        .sidebar-widget {
            background-color: white;
            border-radius: var(--border-radius);
            padding: 25px;
            box-shadow: var(--shadow);
        }
        
        .widget-title {
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 20px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--light-gray);
            position: relative;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        
        .widget-title:after {
            content: '';
            position: absolute;
            bottom: -2px;
            left: 0;
            width: 50px;
            height: 2px;
            background: var(--gradient-primary);
        }
        
        .widget-title i {
            color: var(--primary);
        }

        .recommended-list, .popular-list, .latest-list {
            display: flex;
            flex-direction: column;
            gap: 15px;
        }
        
        .recommended-item, .popular-item, .latest-item {
            display: flex;
            gap: 15px;
            padding-bottom: 15px;
            border-bottom: 1px dashed var(--light-gray);
            transition: var(--transition);
        }
        
        .recommended-item:last-child, .popular-item:last-child, .latest-item:last-child {
            border-bottom: none;
            padding-bottom: 0;
        }
        
        .recommended-item:hover, .popular-item:hover, .latest-item:hover {
            transform: translateX(5px);
        }
        
        .item-thumb {
            width: 80px;
            height: 60px;
            border-radius: 6px;
            background-color: var(--light-gray);
            flex-shrink: 0;
            overflow: hidden;
            position: relative;
        }
        
        .item-content {
            flex: 1;
        }
        
        .item-title {
            font-size: 0.95rem;
            font-weight: 600;
            color: var(--dark);
            line-height: 1.4;
            margin-bottom: 5px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        
        .item-title a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        
        .item-title a:hover {
            color: var(--primary);
        }
        
        .item-meta {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.8rem;
            color: var(--medium-gray);
        }

        .related-articles {
            margin-top: 80px;
        }
        
        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }
        
        .section-title {
            font-size: 2rem;
            font-weight: 800;
            color: var(--dark);
            margin-bottom: 15px;
            position: relative;
            display: inline-block;
        }
        
        .section-title:after {
            content: '';
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: var(--gradient-primary);
            border-radius: 2px;
        }
        
        .related-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
            gap: 30px;
        }
        
        .related-card {
            background-color: white;
            border-radius: var(--border-radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--light-gray);
        }
        
        .related-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }
        
        .related-image {
            height: 180px;
            background-color: var(--light-gray);
            position: relative;
            overflow: hidden;
        }
        
        .related-content {
            padding: 20px;
        }
        
        .related-title {
            font-size: 1.2rem;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            line-height: 1.4;
        }
        
        .related-title a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }
        
        .related-title a:hover {
            color: var(--primary);
        }
        
        .related-excerpt {
            color: var(--medium-gray);
            font-size: 0.95rem;
            line-height: 1.6;
            margin-bottom: 15px;
            display: -webkit-box;
            -webkit-line-clamp: 3;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .footer {
            background-color: var(--dark);
            color: white;
            padding: 80px 0 30px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 50px;
        }
        
        .footer-col h3 {
            font-size: 1.3rem;
            margin-bottom: 25px;
            position: relative;
            padding-bottom: 10px;
        }
        
        .footer-col h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 3px;
            background: var(--gradient-primary);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 12px;
        }
        
        .footer-links a {
            color: #bbb;
            text-decoration: none;
            transition: var(--transition);
        }
        
        .footer-links a:hover {
            color: white;
            padding-left: 5px;
        }
        
        .footer-keywords {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 15px;
        }
        
        .footer-keyword {
            background-color: #333;
            color: #ddd;
            padding: 5px 12px;
            border-radius: 20px;
            font-size: 0.85rem;
            text-decoration: none;
            transition: var(--transition);
        }
        
        .footer-keyword:hover {
            background-color: var(--primary);
            color: white;
        }
        
        .footer-bottom {
            border-top: 1px solid #444;
            padding-top: 30px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 20px;
        }
        
        .copyright {
            color: #bbb;
        }
        
        .copyright a {
            color: var(--primary-light);
            text-decoration: none;
        }
        
        .footer-social {
            display: flex;
            gap: 15px;
        }
        
        .social-link {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background-color: #333;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            text-decoration: none;
            transition: var(--transition);
        }
        
        .social-link:hover {
            background: var(--gradient-primary);
            transform: translateY(-3px);
        }
        
        @media (max-width: 992px) {
            .article-main {
                grid-template-columns: 1fr;
                gap: 40px;
            }
            
            .sidebar {
                order: -1;
            }
            
            .article-title {
                font-size: 1.9rem;
            }
            
            .nav-menu {
                gap: 20px;
            }
        }
        
        @media (max-width: 768px) {
            .mobile-toggle {
                display: block;
            }
            
            .nav-menu {
                position: fixed;
                top: 90px;
                left: 0;
                width: 100%;
                background-color: white;
                flex-direction: column;
                padding: 20px;
                box-shadow: 0 10px 15px rgba(0, 0, 0, 0.1);
                transform: translateY(-100%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 999;
            }
            
            .nav-menu.active {
                transform: translateY(0);
                opacity: 1;
                visibility: visible;
            }
            
            .dropdown-content {
                position: static;
                box-shadow: none;
                opacity: 1;
                visibility: visible;
                transform: none;
                display: none;
                background-color: var(--light);
                border-radius: 0;
                padding-left: 20px;
            }
            
            .dropdown.active .dropdown-content {
                display: block;
            }
            
            .article-content-area {
                padding: 30px 20px;
            }
            
            .article-title {
                font-size: 1.7rem;
            }
            
            .article-navigation {
                flex-direction: column;
                gap: 20px;
            }
            
            .nav-link-item {
                max-width: 100%;
            }
            
            .related-grid {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 480px) {
            .article-title {
                font-size: 1.5rem;
            }
            
            .article-meta {
                flex-direction: column;
                align-items: flex-start;
                gap: 10px;
            }
            
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
        }