:root {
            --primary-color: #0A6EBD;
            --primary-light: #E8F4FC;
            --secondary-color: #FF9900;
            --secondary-light: #FFF4E5;
            --light-bg: #F9FAFB;
            --text-dark: #2D3748;
            --text-gray: #4A5568;
            --border-gray: #E2E8F0;
            --white: #FFFFFF;
            --card-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
            --card-shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
            --office-blue: #0A6EBD;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: 'Inter', 'system-ui', -apple-system, BlinkMacSystemFont, sans-serif;
            color: var(--text-dark);
            background-color: var(--light-bg);
            line-height: 1.7;
        }

        a {
            text-decoration: none;
            color: var(--primary-color);
            transition: color 0.2s ease;
        }
        
        a:hover {
            color: var(--secondary-color);
        }
        
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }

        /* 导航栏 */
        header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            background-color: rgba(10, 110, 189, 0.95);
            backdrop-filter: blur(8px);
            color: var(--white);
            box-shadow: var(--card-shadow);
            z-index: 1000;
            transition: all 0.3s ease;
        }
        
        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 1.5rem;
            max-width: 1280px;
            margin: 0 auto;
        }

        .nav-title {
            font-size: 1.25rem;
            font-weight: bold;
            letter-spacing: -0.025em;
        }
        
        #menu-toggle {
            display: none;
            background: none;
            border: none;
            color: var(--white);
            font-size: 1.5rem;
            cursor: pointer;
            outline: none;
        }
        
        /* 桌面端导航 */
        .desktop-nav {
            display: flex;
            align-items: center;
            column-gap: 2rem;
        }
        
        .desktop-nav a {
            transition: all 0.3s ease;
            font-weight: 500;
            padding: 0.5rem 0;
            position: relative;
            color: var(--white);
        }
        
        .desktop-nav a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        
        .desktop-nav a:hover:after {
            width: 100%;
        }

        .desktop-nav a:hover {
            color: var(--secondary-color);
        }
        
        /* 移动端导航菜单 */
        #mobile-menu {
            position: fixed;
            top: 70px;
            left: 0;
            width: 100%;
            height: calc(100vh - 70px);
            background-color: rgba(10, 110, 189, 0.98);
            backdrop-filter: blur(12px);
            z-index: 900;
            display: flex;
            flex-direction: column;
            align-items: center;
            padding: 2rem 0;
            transform: translateY(-120%);
            transition: transform 0.4s ease;
        }
        
        #mobile-menu.open {
            transform: translateY(0);
        }
        
        #mobile-menu a {
            padding: 1.2rem 0;
            font-size: 1.2rem;
            font-weight: 500;
            position: relative;
            transition: all 0.3s ease;
            width: 100%;
            text-align: center;
            color: var(--white);
        }
        
        #mobile-menu a:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            background-color: var(--secondary-color);
            transition: width 0.3s ease;
        }
        
        #mobile-menu a:hover:after {
            width: 40px;
        }
        
        #mobile-menu a:hover {
            color: var(--secondary-color);
        }

        /* 文章内容区 */
        .article-section {
            padding: 10rem 0 5rem;
        }
        
        .article-container {
            display: grid;
            grid-template-columns: 1fr 300px;
            gap: 2.5rem;
        }
        
        .article-main {
            background-color: var(--white);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            padding: 2.5rem;
        }
        
        .article-header {
            margin-bottom: 2rem;
            border-bottom: 1px solid var(--border-gray);
            padding-bottom: 1.5rem;
        }
        
        .article-title {
            font-size: 2rem;
            font-weight: 700;
            color: var(--primary-color);
            margin-bottom: 1rem;
            line-height: 1.3;
        }
        
        .article-meta {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            color: var(--text-gray);
            font-size: 0.95rem;
        }
        
        .meta-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        
        .article-content {
            font-size: 1.05rem;
            color: var(--text-dark);
        }
        
        .article-content p {
            margin-bottom: 1.5rem;
        }
        
        .article-content h2 {
            font-size: 1.5rem;
            color: var(--primary-color);
            margin: 2rem 0 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 1px solid var(--border-gray);
        }
        
        .article-content h3 {
            font-size: 1.25rem;
            color: var(--primary-color);
            margin: 1.5rem 0 0.75rem;
        }
        
        .article-content ul {
            margin: 0 0 1.5rem 1.5rem;
        }
        
        .article-content li {
            margin-bottom: 0.5rem;
        }
        
        .article-content .highlight-box {
            background-color: var(--primary-light);
            border-left: 4px solid var(--primary-color);
            padding: 1rem 1.25rem;
            margin: 1.5rem 0;
            border-radius: 0 6px 6px 0;
        }
        
        .article-image {
            max-width: 100%;
            border-radius: 8px;
            margin: 1.5rem 0;
        }
        
        /* 侧边栏 */
        .sidebar {
            display: flex;
            flex-direction: column;
            gap: 1.5rem;
        }
        
        .sidebar-widget {
            background-color: var(--white);
            border-radius: 12px;
            box-shadow: var(--card-shadow);
            padding: 1.5rem;
        }
        
        .widget-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: var(--primary-color);
            margin-bottom: 1rem;
            padding-bottom: 0.75rem;
            border-bottom: 1px solid var(--border-gray);
        }
        
        .related-list {
            list-style: none;
        }
        
        .related-item {
            margin-bottom: 1rem;
            padding-bottom: 1rem;
            border-bottom: 1px solid var(--border-gray);
        }
        
        .related-item:last-child {
            margin-bottom: 0;
            padding-bottom: 0;
            border-bottom: none;
        }
        
        .related-link {
            display: block;
            font-weight: 500;
            transition: all 0.2s ease;
        }
        
        .related-link:hover {
            color: var(--secondary-color);
            transform: translateX(4px);
        }
        
        .category-list {
            list-style: none;
        }
        
        .category-item {
            margin-bottom: 0.75rem;
        }
        
        .category-link {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0.5rem 0;
            border-bottom: 1px dashed var(--border-gray);
        }
        
        .category-count {
            background-color: var(--primary-light);
            color: var(--primary-color);
            font-size: 0.8rem;
            padding: 0.1rem 0.5rem;
            border-radius: 10px;
        }
        
        /* 文章底部 */
        .article-footer {
            margin-top: 2rem;
            padding-top: 1.5rem;
            border-top: 1px solid var(--border-gray);
        }
        
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 0.75rem;
            margin-bottom: 1.5rem;
        }
        
        .tag {
            background-color: var(--primary-light);
            color: var(--primary-color);
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.9rem;
            transition: all 0.2s ease;
        }
        
        .tag:hover {
            background-color: var(--primary-color);
            color: var(--white);
        }
        
        .article-nav {
            display: flex;
            justify-content: space-between;
            margin-top: 2rem;
            gap: 1rem;
        }
        
        .nav-link {
            display: flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--primary-color);
            font-weight: 500;
        }
        
        .prev-link {
            justify-content: flex-start;
        }
        
        .next-link {
            justify-content: flex-end;
        }
        
        .nav-link i {
            transition: transform 0.2s ease;
        }
        
        .prev-link:hover i {
            transform: translateX(-4px);
        }
        
        .next-link:hover i {
            transform: translateX(4px);
        }
        
        /* 页脚 */
        .footer {
            background-color: #1A365D;
            color: #E2E8F0;
            padding: 2.5rem 0;
            font-size: 0.95rem;
        }
        
        .footer-container {
            display: flex;
            flex-direction: column;
            align-items: center;
            text-align: center;
            gap: 1.5rem;
        }
        
        .footer-logo {
            margin-bottom: 1rem;
            display: flex;
            align-items: center;
            font-weight: 700;
            font-size: 1.2rem;
        }
        
        .footer-links {
            display: flex;
            gap: 1.5rem;
            margin-bottom: 1.5rem;
            flex-wrap: wrap;
            justify-content: center;
        }
        
        .footer-links a {
            color: #E2E8F0;
        }
        
        .footer-links a:hover {
            color: var(--secondary-color);
        }
        
        .copyright {
            opacity: 0.8;
        }

        /* 响应式媒体查询 */
        @media (max-width: 992px) {
            .article-container {
                grid-template-columns: 1fr;
            }
            
            .sidebar {
                display: none;
            }
        }
        
        @media (max-width: 768px) {
            #menu-toggle {
                display: block;
            }
            
            .desktop-nav {
                display: none;
            }
            
            .article-section {
                padding: 8rem 0 3rem;
            }
            
            .article-main {
                padding: 1.5rem;
            }
            
            .article-title {
                font-size: 1.75rem;
            }
        }
        
        @media (max-width: 480px) {
            .nav-container {
                padding: 0.8rem;
            }
            
            .article-title {
                font-size: 1.5rem;
            }
            
            .article-meta {
                gap: 1rem;
                flex-direction: column;
                align-items: flex-start;
            }
        }