* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            height: 100vh;
            overflow: hidden;
            margin: 0;
            padding: 0;
        }

        .container {
            height: 99vh;
            margin: 0.5vh auto;
            width: 99vw;
            display: flex;
            flex-direction: column;
            background: #f5f5f5;
            border-radius: 4px;
            box-shadow: 0 1px 4px rgba(0,0,0,0.1);
        }

        .filter-container {
            background: #fff;
            border-bottom: 1px solid #e0e0e0;
            border-radius: 4px 4px 0 0;
            padding: 8px 15px;
        }

        .filter-row {
            display: flex;
            align-items: center;
            margin-bottom: 6px;
        }

        .filter-row:last-child {
            margin-bottom: 0;
        }

        .filter-label {
            font-size: 13px;
            font-weight: 600;
            color: #333;
            min-width: 60px;
            margin-right: 10px;
        }

        .filter-options {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
        }

        .filter-option {
            padding: 4px 14px;
            cursor: pointer;
            font-size: 12px;
            color: #666;
            background: #f5f5f5;
            border: 1px solid #e0e0e0;
            border-radius: 12px;
            transition: all 0.2s ease;
            white-space: nowrap;
        }

        .filter-option:hover {
            background: #e8f4ff;
            color: #1890ff;
            border-color: #1890ff;
        }

        .filter-option.active {
            background: #1890ff;
            color: #fff;
            border-color: #1890ff;
        }

        .content {
            flex: 1;
            overflow-y: auto;
            padding: 12px 15px;
            background: #fff;
            border-radius: 0 0 4px 4px;
        }

        .content-section {
            display: none;
        }

        .content-section.active {
            display: block;
            animation: fadeIn 0.2s ease;
        }

        @keyframes fadeIn {
            from {
                opacity: 0;
                transform: translateY(5px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        .links-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 10px;
        }

        .link-card {
            background: #f8f9fa;
            padding: 12px;
            border-radius: 4px;
            text-decoration: none;
            color: #333;
            transition: all 0.2s ease;
            border: 1px solid #e0e0e0;
        }

        .link-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
            border-color: #1890ff;
        }

        .link-card h3 {
            font-size: 14px;
            margin-bottom: 6px;
            color: #1890ff;
        }

        .link-card p {
            font-size: 12px;
            color: #666;
            line-height: 1.4;
            margin: 0;
        }

        .category-title {
            font-size: 18px;
            font-weight: 600;
            color: #333;
            margin-bottom: 8px;
        }

        .category-desc {
            font-size: 13px;
            color: #999;
            margin-bottom: 12px;
        }

        .host-section {
            margin-bottom: 15px;
        }

        .region-wrapper {
            position: relative;
            padding-top: 5px;
            margin-bottom: 20px;
        }

        .region-badge {
            position: absolute;
            top: 0;
            right: 0;
            background: linear-gradient(135deg, #52c41a 0%, #389e0d 100%);
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            padding: 6px 16px;
            border-radius: 0 0 0 12px;
            box-shadow: 0 2px 6px rgba(0,0,0,0.15);
            z-index: 10;
        }

        .host-header {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 10px;
            margin-bottom: 10px;
        }

        .host-title-card {
            font-size: 13px;    
            font-weight: 600;
            color: #fff;
            padding: 10px 12px;
            background: linear-gradient(135deg, #1890ff 0%, #096dd9 100%);
            border-radius: 4px;
            border: none;
            display: flex;  
            flex-direction: column;
            justify-content: center;
        }

        .host-name {
            font-size: 14px;
            margin-bottom: 4px;
        }

        .host-ip {
            font-size: 11px;
            color: rgba(255, 255, 255, 0.85);
            font-weight: normal;
            font-family: 'Courier New', monospace;
        }

        .region-title-card {
            display: none;
        }