:root {
            --primary: #3b82f6;
            --primary-light: #dbeafe;
            --success: #10b981;
            --danger: #ef4444;
            --warning: #f59e0b;
            --info: #3b82f6;
            --dark: #1e293b;
            --light: #f8fafc;
            --gray: #64748b;
            --gray-light: #e2e8f0;
            --radius: 8px;
            --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
            --transition: all 0.2s ease-out;
        }

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

        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
            line-height: 1.5;
            color: var(--dark);
            background-color: white;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            flex: 1;
        }

        /* 顶部区域 */
        .header {
            padding: 20px 0;
            text-align: center;
        }

        .logo {
            display: inline-flex;
            flex-direction: column;
            align-items: center;
            margin-bottom: 20px;
        }

        .logo-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            border-radius: var(--radius);
            display: flex;
            justify-content: center;
            align-items: center;
            font-size: 24px;
            color: white;
            margin-bottom: 12px;
            box-shadow: var(--shadow);
        }

        .logo-text {
            font-size: 24px;
            font-weight: 700;
            color: var(--dark);
            letter-spacing: -0.5px;
        }

        /* 滑动标签导航 */
        .tabs-container {
            width: 100%;
            overflow-x: auto;
            -webkit-overflow-scrolling: touch;
            margin-bottom: 20px;
            padding-bottom: 10px;
            scrollbar-width: none;
        }

        .tabs-container::-webkit-scrollbar {
            display: none;
        }

        .tabs {
            display: inline-flex;
            min-width: 100%;
            gap: 8px;
            padding: 0 10px;
        }

        .tab-btn {
            padding: 10px 20px;
            background: var(--gray-light);
            border: none;
            color: var(--gray);
            border-radius: var(--radius);
            cursor: pointer;
            transition: var(--transition);
            font-weight: 500;
            font-size: 14px;
            position: relative;
            white-space: nowrap;
            flex-shrink: 0;
        }

        .tab-btn.active {
            background: var(--primary);
            color: white;
        }

        .tab-btn.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 24px;
            height: 3px;
            background: var(--primary);
            border-radius: 3px;
        }

        .tab-btn:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        /* 标签内容 */
        .tab-content {
            display: none;
            opacity: 0;
            transform: translateY(10px);
            transition: opacity 0.3s ease-out, transform 0.3s ease-out;
        }

        .tab-content.active {
            display: block;
            opacity: 1;
            transform: translateY(0);
        }

        /* 主内容区 */
        .main-content {
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 20px;
            padding-bottom: 30px;
        }

        /* 卡片样式 */
        .card {
            background: white;
            border-radius: var(--radius);
            padding: 20px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border: 1px solid var(--gray-light);
        }

        .card:hover {
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        /* 表单样式 */
        .form-group {
            margin-bottom: 16px;
        }

        .form-group label {
            display: block;
            margin-bottom: 6px;
            font-weight: 500;
            color: var(--dark);
            font-size: 14px;
        }

        .form-control {
            width: 100%;
            padding: 12px;
            border: 1px solid var(--gray-light);
            border-radius: var(--radius);
            color: var(--dark);
            font-size: 14px;
            transition: var(--transition);
            background: white;
        }

        .form-control:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
        }

        .form-control::placeholder {
            color: var(--gray);
            opacity: 0.6;
        }

        .input-group {
            display: flex;
            align-items: center;
        }

        .input-group-text {
            padding: 12px;
            background: var(--gray-light);
            border: 1px solid var(--gray-light);
            border-right: none;
            border-radius: var(--radius) 0 0 var(--radius);
            color: var(--dark);
            font-size: 14px;
        }

        .input-group input {
            border-radius: 0 var(--radius) var(--radius) 0;
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 20px;
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
            color: white;
            border: none;
            border-radius: var(--radius);
            font-size: 14px;
            font-weight: 500;
            cursor: pointer;
            transition: var(--transition);
            text-decoration: none;
            gap: 8px;
            box-shadow: var(--shadow);
        }

        .btn:hover {
            transform: translateY(-2px);
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
        }

        .btn i {
            font-size: 14px;
        }

        .btn-primary {
            background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 100%);
        }

        .btn-success {
            background: linear-gradient(135deg, #10b981 0%, #047857 100%);
        }

        .btn-danger {
            background: linear-gradient(135deg, #ef4444 0%, #b91c1c 100%);
        }

        .btn:disabled {
            background: var(--gray-light);
            color: var(--gray);
            cursor: not-allowed;
            transform: none;
            box-shadow: none;
        }

        .btn-block {
            width: 100%;
        }

        /* 结果区域 */
        .result-box {
            display: flex;
            align-items: flex-start;
            padding: 16px;
            border-radius: var(--radius);
            background: white;
            box-shadow: var(--shadow);
            gap: 12px;
            margin-bottom: 16px;
            border-left: 4px solid;
        }

        .result-icon {
            font-size: 20px;
            min-width: 36px;
            text-align: center;
            margin-top: 2px;
        }

        .result-content {
            flex: 1;
        }

        .result-content h3 {
            margin-bottom: 6px;
            font-size: 16px;
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--dark);
        }

        .status-badge {
            background: var(--color);
            padding: 4px 10px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 500;
            color: white;
        }

        .domain-name {
            font-weight: 600;
        }

        .result-content p {
            margin-bottom: 4px;
            font-size: 14px;
            color: var(--dark);
        }

        .result-content small {
            opacity: 0.8;
            font-size: 13px;
            color: var(--gray);
        }

        /* 消息提示 */
        .alert {
            padding: 14px;
            margin-bottom: 20px;
            border-radius: var(--radius);
            font-size: 14px;
            display: flex;
            align-items: center;
            gap: 10px;
            border-left: 4px solid transparent;
        }

        .alert-success {
            background: rgba(16, 185, 129, 0.1);
            color: var(--dark);
            border-left-color: var(--success);
        }

        .alert-danger {
            background: rgba(239, 68, 68, 0.1);
            color: var(--dark);
            border-left-color: var(--danger);
        }

        /* 统计卡片 */
        .stats-card {
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 20px;
            background: white;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .stats-value {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 6px;
            color: var(--dark);
            line-height: 1;
        }

        .stats-label {
            font-size: 14px;
            color: var(--gray);
        }

        /* 页脚 */
        .footer {
            text-align: center;
            padding: 20px 0;
            border-top: 1px solid var(--gray-light);
            color: var(--gray);
            font-size: 13px;
        }

        /* IP输入组 */
        .ip-input-group {
            display: flex;
            align-items: center;
        }

        .ip-input-group input {
            flex: 1;
            border-radius: var(--radius) 0 0 var(--radius);
        }

        .ip-input-group button {
            width: auto;
            padding: 12px;
            border-radius: 0 var(--radius) var(--radius) 0;
            background: var(--gray-light);
            color: var(--dark);
            border: 1px solid var(--gray-light);
            border-left: none;
            cursor: pointer;
            transition: var(--transition);
            font-size: 13px;
        }

        .ip-input-group button:hover {
            background: var(--primary-light);
            color: var(--primary);
        }

        .ip-hint {
            font-size: 12px;
            color: var(--gray);
            margin-top: 4px;
            padding-left: 4px;
        }

        /* 弹窗样式 */
        .modal {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgba(0, 0, 0, 0.5);
            z-index: 1000;
            justify-content: center;
            align-items: center;
        }

        .modal-content {
            background-color: white;
            border-radius: var(--radius);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            width: 90%;
            max-width: 500px;
            max-height: 90vh;
            overflow-y: auto;
            padding: 20px;
            position: relative;
        }

        .modal-close {
            position: absolute;
            top: 10px;
            right: 10px;
            background: none;
            border: none;
            font-size: 20px;
            cursor: pointer;
            color: var(--gray);
        }

        .modal-title {
            font-size: 18px;
            margin-bottom: 15px;
            color: var(--dark);
            font-weight: 600;
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .container {
                padding: 15px;
            }
            
            .header {
                padding: 15px 0;
            }
            
            .logo-icon {
                width: 50px;
                height: 50px;
                font-size: 20px;
                margin-bottom: 10px;
            }
            
            .logo-text {
                font-size: 20px;
            }
            
            .tabs {
                gap: 6px;
                padding: 0 5px;
            }
            
            .tab-btn {
                padding: 8px 14px;
                font-size: 13px;
            }
            
            .card {
                padding: 16px;
            }
            
            .form-control {
                padding: 10px 12px;
                font-size: 13px;
            }
            
            .btn {
                padding: 10px 16px;
                font-size: 13px;
            }
            
            .stats-value {
                font-size: 30px;
            }
            
            .stats-label {
                font-size: 13px;
            }
        }

        /* 小屏幕手机适配 */
        @media (max-width: 480px) {
            .logo-icon {
                width: 44px;
                height: 44px;
                font-size: 18px;
                margin-bottom: 8px;
            }
            
            .logo-text {
                font-size: 18px;
            }
            
            .card {
                padding: 14px;
            }
            
            .form-group {
                margin-bottom: 12px;
            }
            
            .form-group label {
                font-size: 13px;
            }
            
            .result-box {
                padding: 12px;
                flex-direction: column;
                align-items: flex-start;
            }
            
            .result-icon {
                margin-bottom: 6px;
            }
            
            .stats-card {
                padding: 16px;
            }
            
            .stats-value {
                font-size: 28px;
            }
            
            .tab-btn {
                padding: 8px 12px;
                font-size: 12px;
            }
        }
        
        /* 公告样式 */
.announcement-box {
    background-color: #f8f9fa;
    border-left: 4px solid #ffc107;
    border-radius: 4px;
    padding: 15px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.announcement-header {
    font-weight: bold;
    margin-bottom: 10px;
    color: #343a40;
    font-size: 1.1em;
}

.announcement-header i {
    margin-right: 8px;
    color: #ffc107;
}

.announcement-content {
    line-height: 1.6;
    color: #495057;
}