/* 全局样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        body {
            background: #f5f7fa;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        /* 顶部导航 */
        .top-nav {
            background: #fff;
            border-bottom: 1px solid #eaeef1;
            padding: 0 30px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 1000;
            box-shadow: 0 2px 4px rgba(0,0,0,0.05);
        }
        .top-nav-container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 30px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            box-sizing: border-box;
        }
        .top-nav .logo {
            font-size: 20px;
            font-weight: bold;
            color: #333;
            text-decoration: none;
            display: flex;
            align-items: center;
        }
        .top-nav .logo i {
            color: #1E9FFF;
            margin-right: 8px;
        }
        .top-nav .nav-links {
            display: flex;
            gap: 30px;
        }
        .top-nav .nav-links a {
            color: #666;
            text-decoration: none;
            font-size: 14px;
            transition: color .3s;
        }
        .top-nav .nav-links a:hover {
            color: #1E9FFF;
        }
        .top-nav .nav-links a i {
            font-size: 16px;
            line-height: 1;
        }

        /* 主容器 */
        .main-container {
            margin-top: 60px;
            padding: 30px;
            max-width: 1200px;
            margin-left: auto;
            margin-right: auto;
            box-sizing: border-box;
        }

        /* 页面标题 */
        .page-title {
            margin-bottom: 30px;
            text-align: center;
        }
        .page-title h1 {
            font-size: 24px;
            color: #333;
            margin-bottom: 10px;
        }
        .page-title p {
            font-size: 14px;
            color: #999;
        }

        /* 分类标签 */
        .category-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-bottom: 20px;
        }
        .category-tag-item {
            display: inline-block;
            padding: 8px 16px;
            background: #fff;
            border: 1px solid #eaeef1;
            border-radius: 20px;
            font-size: 14px;
            color: #666;
            text-decoration: none;
            transition: all .3s;
        }
        .category-tag-item:hover {
            border-color: #1E9FFF;
            color: #1E9FFF;
        }
        .category-tag-item.active {
            background: #1E9FFF;
            border-color: #1E9FFF;
            color: #fff;
        }

        /* 排序筛选 */
        .filter-bar {
            background: #fff;
            border-radius: 8px;
            padding: 15px 20px;
            margin-bottom: 20px;
            box-shadow: 0 1px 4px rgba(0,0,0,.05);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 15px;
        }
        .filter-bar .filter-item {
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .filter-bar .filter-item label {
            font-size: 14px;
            color: #666;
        }
        .filter-bar .filter-item select {
            border: 1px solid #eaeef1;
            border-radius: 4px;
            padding: 6px 12px;
            font-size: 14px;
            color: #333;
            outline: none;
            transition: border-color .3s;
        }
        .filter-bar .filter-item select:hover,
        .filter-bar .filter-item select:focus {
            border-color: #1E9FFF;
        }

        /* 工具列表 */
        .tool-list {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
            gap: 20px;
            margin-bottom: 30px;
        }
        .tool-card {
            background: #fff;
            border-radius: 8px;
            padding: 20px;
            box-shadow: 0 1px 4px rgba(0,0,0,.05);
            transition: all .3s;
            text-decoration: none;
            color: inherit;
        }
        .tool-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0,0,0,.1);
        }
        .tool-card-header {
            display: flex;
            align-items: flex-start;
            margin-bottom: 15px;
        }
        .tool-card-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #1E9FFF 0%, #40a9ff 100%);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            color: #fff;
            font-size: 24px;
            flex-shrink: 0;
        }
        .tool-card-info {
            flex: 1;
        }
        .tool-card-title {
            font-size: 16px;
            font-weight: bold;
            color: #333;
            margin-bottom: 5px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }
        .tool-card-desc {
            font-size: 13px;
            color: #999;
            line-height: 1.4;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            margin-bottom: 10px;
        }
        .tool-card-meta {
            display: flex;
            align-items: center;
            gap: 15px;
            font-size: 12px;
            color: #999;
        }
        .tool-card-meta .downloads {
            display: flex;
            align-items: center;
            gap: 5px;
        }
        .tool-card-meta .price {
            font-weight: bold;
        }
        .tool-card-meta .price.free {
            color: #52c41a;
        }
        .tool-card-meta .price.paid {
            color: #fa8c16;
        }

        /* 分页 */
        .pagination {
            display: flex;
            justify-content: center;
            margin-top: 30px;
        }

        /* 底部 */
        .footer {
            background: #fff;
            border-top: 1px solid #eaeef1;
            padding: 30px;
            text-align: center;
            color: #999;
            font-size: 13px;
        }
        .footer a {
            color: #666;
            text-decoration: none;
            margin: 0 10px;
        }
        .footer a:hover {
            color: #1E9FFF;
        }
        .footer p {
            margin-bottom: 10px;
        }

        /* ==================== 移动端响应式样式 ==================== */
        @media screen and (max-width: 768px) {
            /* 顶部导航调整 */
            .top-nav {
                padding: 0 15px;
                height: 50px;
            }
            .top-nav .logo {
                font-size: 18px;
                flex: 1;
            }
            .top-nav .nav-links {
                display: flex;
                gap: 15px;
            }
            .top-nav .nav-links a:not(:first-child) {
                display: none;
            }

            /* 主容器调整 */
            .main-container {
                margin-top: 50px;
                padding: 15px;
            }

            /* 页面标题调整 */
            .page-title h1 {
                font-size: 20px;
            }

            /* 筛选栏调整 */
            .filter-bar {
                padding: 12px 15px;
                gap: 10px;
            }
            .filter-bar .filter-item {
                flex-direction: column;
                align-items: flex-start;
                gap: 5px;
                width: 100%;
            }
            .filter-bar .filter-item select {
                width: 100%;
                padding: 8px 12px;
            }

            /* 工具列表调整 */
            .tool-list {
                grid-template-columns: 1fr;
                gap: 15px;
            }
            .tool-card {
                padding: 15px;
            }
            .tool-card-icon {
                width: 50px;
                height: 50px;
                font-size: 20px;
                margin-right: 12px;
            }
            .tool-card-title {
                font-size: 15px;
            }
            .tool-card-meta {
                gap: 10px;
                font-size: 11px;
            }

            /* 底部调整 */
            .footer {
                padding: 20px 15px;
                font-size: 12px;
            }
            .footer a {
                margin: 0 5px;
            }
        }

        /* 平板适配 */
        @media screen and (min-width: 769px) and (max-width: 1024px) {
            .tool-list {
                grid-template-columns: repeat(2, 1fr);
            }
        }