/* 文章分类标签美化 */
        .category-tabs {
            background: var(--bg-primary);
            border-radius: 16px;
            box-shadow: var(--shadow-sm);
            padding: 1rem;
            margin-bottom: 2rem;
            overflow-x: auto;
            white-space: nowrap;
            border: 1px solid var(--border-color);
        }

        .category-tab {
            display: inline-block;
            padding: 0.625rem 1.5rem;
            margin: 0 0.375rem;
            border-radius: 24px;
            text-decoration: none;
            color: var(--text-secondary);
            transition: all 0.3s ease;
            cursor: pointer;
            font-weight: 500;
            font-size: 0.95rem;
            position: relative;
        }

        .category-tab:hover {
            background: var(--bg-secondary);
            color: var(--primary-color);
            transform: translateY(-2px);
        }

        .category-tab.active {
            background: var(--primary-color);
            color: white;
            box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
        }

        /* 搜索框美化 */
        .search-container {
            background: var(--bg-primary);
            border-radius: 16px;
            box-shadow: var(--shadow-sm);
            padding: 1.5rem;
            margin-bottom: 2rem;
            border: 1px solid var(--border-color);
        }

        .search-box {
            position: relative;
        }

        .search-input {
            width: 100%;
            padding: 0.875rem 3rem 0.875rem 1.25rem;
            border: 1px solid var(--border-color);
            border-radius: 12px;
            background: var(--bg-secondary);
            color: var(--text-primary);
            font-size: 1rem;
            transition: all 0.3s ease;
        }

        .search-input:focus {
            border-color: var(--primary-color);
            box-shadow: 0 0 0 3px rgba(24, 144, 255, 0.1);
            outline: none;
        }

        .search-btn {
            position: absolute;
            right: 8px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--primary-color);
            border: none;
            color: white;
            border-radius: 8px;
            width: 40px;
            height: 40px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .search-btn:hover {
            background: var(--secondary-color);
        }
        /* 文章卡片网格布局 */
        .articles-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.25rem;
            margin-bottom: 3rem;
        }

        /* 文章卡片美化 */
        .article-card {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            border-radius: 12px;
            overflow: hidden;
            transition: all 0.3s ease;
            box-shadow: var(--shadow-sm);
            display: flex;
            flex-direction: column;
            height: 100%;
        }

        .article-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: var(--primary-color);
        }

        .article-image {
            height: 140px;
            overflow: hidden;
            position: relative;
        }

        .article-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .article-card:hover .article-image img {
            transform: scale(1.05);
        }

        .article-badge {
            position: absolute;
            top: 10px;
            left: 10px;
            padding: 0.25rem 0.75rem;
            border-radius: 20px;
            font-size: 0.7rem;
            font-weight: 600;
            color: white;
            z-index: 5;
        }

        .article-content {
            padding: 1rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }

        .article-title {
            font-size: 1rem;
            font-weight: 600;
            color: var(--text-primary);
            margin: 0 0 0.5rem;
            line-height: 1.3;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .article-excerpt {
            color: var(--text-secondary);
            margin: 0 0 0.75rem;
            line-height: 1.5;
            flex-grow: 1;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            font-size: 0.85rem;
        }

        .article-meta {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding-top: 0.75rem;
            border-top: 1px solid var(--border-color);
            margin-top: auto;
        }

        .article-meta-left {
            display: flex;
            align-items: center;
            gap: 0.75rem;
            font-size: 0.8rem;
            color: var(--text-secondary);
        }

        .article-meta-item {
            display: flex;
            align-items: center;
            gap: 0.25rem;
        }

        .article-actions {
            display: flex;
            gap: 0.375rem;
        }

        .article-action-btn {
            background: transparent;
            border: 1px solid var(--border-color);
            color: var(--text-secondary);
            border-radius: 6px;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            font-size: 0.85rem;
        }

        .article-action-btn:hover {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        .article-action-btn.active {
            background: var(--primary-color);
            color: white;
            border-color: var(--primary-color);
        }

        /* 分页控件美化 */
        .pagination-container {
            display: flex;
            justify-content: center;
            margin: 3rem 0;
        }

        .pagination {
            display: flex;
            gap: 0.5rem;
            background: var(--bg-primary);
            border-radius: 12px;
            padding: 0.5rem;
            box-shadow: var(--shadow-md);
            border: 1px solid var(--border-color);
        }

        .page-item {
            display: flex;
            align-items: center;
        }

        .page-link {
            color: var(--text-secondary);
            background: var(--bg-secondary);
            border: none;
            padding: 0.5rem 0.875rem;
            border-radius: 8px;
            transition: all 0.3s ease;
            font-weight: 500;
            min-width: 40px;
            text-align: center;
        }

        .page-link:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }

        .page-item.active .page-link {
            background: var(--primary-color);
            color: white;
            box-shadow: 0 4px 12px rgba(24, 144, 255, 0.3);
        }

        .page-item.disabled .page-link {
            color: var(--text-secondary);
            opacity: 0.5;
            cursor: not-allowed;
        }

        .page-item.disabled .page-link:hover {
            background: var(--bg-secondary);
            transform: none;
        }

        /* 分页导航按钮 */
        .page-nav-btn {
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0.5rem 0.75rem;
            background: var(--bg-secondary);
            border: none;
            border-radius: 8px;
            color: var(--text-secondary);
            transition: all 0.3s ease;
            cursor: pointer;
        }

        .page-nav-btn:hover {
            background: var(--primary-color);
            color: white;
            transform: translateY(-2px);
        }

        .page-nav-btn:disabled {
            opacity: 0.5;
            cursor: not-allowed;
        }

        .page-nav-btn:disabled:hover {
            background: var(--bg-secondary);
            transform: none;
        }

        /* 分页信息 */
        .pagination-info {
            display: flex;
            align-items: center;
            padding: 0 1rem;
            color: var(--text-secondary);
            font-size: 0.875rem;
            white-space: nowrap;
        }

        /* 工具栏美化 */
        .toolbar {
            position: fixed;
            bottom: 30px;
            right: 30px;
            display: flex;
            flex-direction: column;
            gap: 12px;
            z-index: 1000;
        }

        .tool-btn {
            width: 52px;
            height: 52px;
            border-radius: 50%;
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            box-shadow: var(--shadow-md);
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            transition: all 0.3s ease;
            color: var(--text-secondary);
            font-size: 1.25rem;
        }

        .tool-btn:hover {
            transform: scale(1.1) translateY(-3px);
            box-shadow: var(--shadow-lg);
            color: var(--primary-color);
            border-color: var(--primary-color);
        }

        /* 页脚美化 */
        footer {
            background: var(--bg-primary);
            border-top: 1px solid var(--border-color);
            padding: 3rem 0 2rem;
        }

        .footer-links {
            display: flex;
            justify-content: center;
            gap: 2.5rem;
            margin-bottom: 2rem;
            flex-wrap: wrap;
        }

        .footer-links a {
            color: var(--text-secondary);
            text-decoration: none;
            transition: all 0.3s ease;
            font-weight: 500;
        }

        .footer-links a:hover {
            color: var(--primary-color);
            transform: translateY(-2px);
        }

        .footer-copyright {
            text-align: center;
            color: var(--text-secondary);
            font-size: 0.875rem;
            padding-top: 2rem;
            border-top: 1px solid var(--border-color);
        }

        /* Toast样式 */
        .toast-container {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1050;
        }

        .toast {
            background: var(--bg-primary);
            border: 1px solid var(--border-color);
            color: var(--text-primary);
            border-radius: 8px;
            box-shadow: var(--shadow-lg);
            min-width: 250px;
            margin-bottom: 10px;
        }

        .toast-header {
            background: transparent;
            border-bottom: 1px solid var(--border-color);
            color: var(--text-primary);
        }

        .toast-body {
            padding: 12px 15px;
        }

        .toast-success {
            border-left: 4px solid var(--success-color);
        }

        .toast-error {
            border-left: 4px solid var(--danger-color);
        }

        .toast-info {
            border-left: 4px solid var(--info-color);
        }

        .toast-warning {
            border-left: 4px solid var(--warning-color);
        }

        /* 响应式设计 */
        @media (max-width: 768px) {
            .navbar-brand {
                font-size: 1.5rem;
            }

            .navbar-brand i {
                font-size: 2rem;
            }

            .articles-grid {
                grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
                gap: 1rem;
            }

            .article-image {
                height: 120px;
            }

            .article-title {
                font-size: 0.9rem;
            }

            .article-excerpt {
                font-size: 0.8rem;
            }

            .toolbar {
                bottom: 20px;
                right: 20px;
            }

            .tool-btn {
                width: 46px;
                height: 46px;
                font-size: 1.1rem;
            }

            .category-tabs {
                padding: 0.75rem;
            }

            .category-tab {
                padding: 0.5rem 1.25rem;
                font-size: 0.875rem;
            }

            .pagination {
                gap: 0.25rem;
            }

            .page-link {
                padding: 0.375rem 0.625rem;
                min-width: 32px;
                font-size: 0.875rem;
            }

            .pagination-info {
                display: none;
            }
        }

        /* 加载动画 */
        .skeleton {
            background: linear-gradient(90deg, var(--bg-secondary) 25%, var(--border-color) 50%, var(--bg-secondary) 75%);
            background-size: 200% 100%;
            animation: loading 1.5s infinite;
        }

        @keyframes loading {
            0% { background-position: 200% 0; }
            100% { background-position: -200% 0; }
        }