/* 全局样式变量 */
:root {
    --primary-color: #6c63ff;
    --secondary-color: #64b5f6;
    --success-color: #48bb78;
    --warning-color: #ed8936;
    --error-color: #f56565;
    --bg-color: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

/* 基础样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: '微软雅黑', 'Microsoft YaHei', Arial, sans-serif;
    background: var(--bg-color);
    min-height: 100vh;
    padding: 20px;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
}

.header {
    text-align: center;
    margin-bottom: 30px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.header h1 {
    color: #4a5568;
    margin-bottom: 10px;
    font-size: 2.5em;
    font-weight: 700;
}

.header p {
    color: #718096;
    font-size: 1.1em;
}

/* 导航标签 */
.nav-tabs {
    display: flex;
    flex-wrap: nowrap;
    gap: 12px;
    margin-bottom: 30px;
    padding: 25px;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(15px);
    border-radius: 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.3);
    overflow-x: auto;
    overflow-y: hidden;
}

.nav-tab {
    padding: 14px 20px;
    background: rgba(108, 99, 255, 0.08);
    color: #6c63ff;
    text-decoration: none;
    border-radius: 25px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    text-align: center;
    white-space: nowrap;
    flex-shrink: 0;
    min-width: auto;
    position: relative;
    overflow: hidden;
}

.nav-tab::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    transition: left 0.5s;
}

.nav-tab:hover::before {
    left: 100%;
}

.nav-tab:hover {
    background: rgba(108, 99, 255, 0.15);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(108, 99, 255, 0.25);
    border-color: rgba(108, 99, 255, 0.3);
}

.nav-tab.active,
.nav-tab[href="index.php"] {
    background: linear-gradient(135deg, #6c63ff 0%, #5a52e0 100%) !important;
    color: white !important;
    border-color: #6c63ff !important;
    box-shadow: 0 8px 30px rgba(108, 99, 255, 0.4) !important;
    transform: translateY(-2px) !important;
}

.nav-tab:hover {
    background: rgba(108, 99, 255, 0.2);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(108, 99, 255, 0.3);
}

.nav-tab.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: 0 4px 15px rgba(108, 99, 255, 0.4);
}

/* 卡片样式 */
.card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 25px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.card h3 {
    color: #4a5568;
    margin-bottom: 20px;
    font-size: 1.4em;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 状态网格 */
.status-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.status-item {
    background: #f8fafc;
    padding: 20px;
    border-radius: 10px;
    border-left: 4px solid #e2e8f0;
}

.status-item.success {
    border-left-color: #48bb78;
    background: #f0fff4;
}

.status-item.warning {
    border-left-color: #ed8936;
    background: #fffaf0;
}

.status-item.error {
    border-left-color: #f56565;
    background: #fff5f5;
}

.status-item h4 {
    color: #2d3748;
    margin-bottom: 5px;
    font-size: 14px;
    font-weight: 600;
}

.status-item .value {
    font-size: 18px;
    font-weight: bold;
    color: #1a202c;
}

/* 双语显示样式 */
.value-container {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.value-chinese {
    font-size: 16px;
    font-weight: bold;
    color: #1a202c;
    line-height: 1.2;
}

.value-english {
    font-size: 12px;
    font-weight: normal;
    color: #718096;
    line-height: 1.3;
    word-break: break-all;
}

.status-item .label {
    font-size: 12px;
    color: #718096;
    margin-top: 5px;
}

/* 测试相关样式 */
.test-section {
    margin-bottom: 25px;
}

.test-row {
    display: flex;
    align-items: center;
    padding: 15px;
    background: #f8fafc;
    border-radius: 8px;
    margin-bottom: 10px;
    transition: all 0.3s ease;
}

.test-row:hover {
    background: #edf2f7;
    transform: translateX(5px);
}

.test-name {
    flex: 1;
    font-weight: 500;
    color: #2d3748;
}

.test-status {
    width: 80px;
    text-align: center;
    font-size: 12px;
    font-weight: 600;
    padding: 5px 10px;
    border-radius: 15px;
}

.test-status.success {
    background: #c6f6d5;
    color: #22543d;
}

.test-status.error {
    background: #fed7d7;
    color: #742a2a;
}

.test-status.testing {
    background: #bee3f8;
    color: #2a4365;
}

.test-latency {
    width: 80px;
    text-align: center;
    font-size: 14px;
    color: #4a5568;
    font-weight: 500;
}

/* 进度条样式 */
.progress-bar {
    width: 100%;
    height: 6px;
    background: #e2e8f0;
    border-radius: 3px;
    overflow: hidden;
    margin: 15px 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    width: 0%;
    transition: width 0.3s ease;
}

/* 按钮样式 */
.btn {
    padding: 12px 24px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* 状态徽章样式 */
.status-badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    text-align: center;
}

.status-badge.success {
    background: #c6f6d5;
    color: #22543d;
}

.status-badge.warning {
    background: #ffd89b;
    color: #744210;
}

.status-badge.error {
    background: #fed7d7;
    color: #742a2a;
}

.status-badge.info {
    background: #bee3f8;
    color: #2a4365;
}

.status-badge.secondary {
    background: #e2e8f0;
    color: #4a5568;
}

/* 输入组样式 */
.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.input-group input {
    flex: 1;
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: #667eea;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-tabs {
        padding: 18px;
        gap: 8px;
    }
    
    .nav-tab {
        padding: 12px 16px;
        font-size: 13px;
        border-radius: 20px;
    }
    
    .status-grid {
        grid-template-columns: 1fr;
    }
    
    .test-row {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .test-status, .test-latency {
        width: auto;
    }
}

/* IPv4页面特定样式美化 */

/* 性能指标网格 */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin: 20px 0;
}

.metric-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid #dee2e6;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.metric-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.metric-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-color);
}

.metric-value {
    font-size: 2.2em;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 8px;
    line-height: 1.2;
}

.metric-label {
    font-size: 14px;
    color: #6c757d;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* 路由追踪样式 */
.test-controls {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    align-items: center;
    flex-wrap: wrap;
}

.form-select {
    padding: 10px 15px;
    border: 2px solid #e1e5e9;
    border-radius: 8px;
    background: white;
    font-size: 14px;
    color: #495057;
    transition: all 0.3s ease;
    min-width: 160px;
}

.form-select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(108, 99, 255, 0.1);
}

.traceroute-results {
    background: #f8f9fa;
    border: 1px solid #e1e5e9;
    border-radius: 12px;
    padding: 20px;
    min-height: 200px;
}

.traceroute-header {
    font-size: 16px;
    font-weight: bold;
    color: #495057;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #e1e5e9;
}

.hop-item {
    display: grid;
    grid-template-columns: 50px 150px 1fr 100px;
    gap: 15px;
    padding: 12px 0;
    border-bottom: 1px solid #e9ecef;
    align-items: center;
}

.hop-item:last-child {
    border-bottom: none;
}

.hop-number {
    font-weight: bold;
    color: var(--primary-color);
    text-align: center;
    background: rgba(108, 99, 255, 0.1);
    border-radius: 20px;
    padding: 5px;
    font-size: 14px;
}

.hop-ip {
    font-family: 'Monaco', 'Consolas', monospace;
    font-size: 14px;
    color: #495057;
    background: white;
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid #e1e5e9;
}

.hop-hostname {
    color: #6c757d;
    font-size: 14px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.hop-latency {
    font-weight: bold;
    color: var(--success-color);
    text-align: right;
    font-size: 14px;
}

/* 详细测试结果样式 */
.results-container {
    margin-top: 20px;
}

.result-summary {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border: 1px solid #2196f3;
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 25px;
}

.result-summary h4 {
    color: #1976d2;
    margin-bottom: 16px;
    font-size: 18px;
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
    margin-top: 15px;
}

.summary-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(255, 255, 255, 0.8);
    padding: 12px 16px;
    border-radius: 8px;
    border: 1px solid rgba(25, 118, 210, 0.2);
}

.summary-label {
    font-weight: 500;
    color: #424242;
    font-size: 14px;
}

.summary-value {
    font-weight: bold;
    font-size: 14px;
}

.summary-value.success {
    color: var(--success-color);
}

.summary-value.error {
    color: var(--error-color);
}

.summary-value.warning {
    color: var(--warning-color);
}

.result-details {
    background: white;
    border: 1px solid #e1e5e9;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 25px;
}

.result-details h4 {
    background: #f8f9fa;
    padding: 16px 20px;
    margin: 0;
    border-bottom: 1px solid #e1e5e9;
    color: #495057;
    font-size: 16px;
}

.result-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 15px;
    padding: 16px 20px;
    background: #f1f3f4;
    border-bottom: 1px solid #e1e5e9;
    font-weight: bold;
    color: #495057;
    font-size: 14px;
}

.result-item {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 15px;
    padding: 16px 20px;
    border-bottom: 1px solid #f1f3f4;
    align-items: center;
    transition: background-color 0.2s ease;
}

.result-item:last-child {
    border-bottom: none;
}

.result-item:hover {
    background-color: #f8f9fa;
}

.result-site-name {
    font-weight: 500;
    color: #495057;
}

.result-status {
    font-weight: bold;
    font-size: 14px;
}

.result-status.success {
    color: var(--success-color);
}

.result-status.error {
    color: var(--error-color);
}

.result-latency {
    font-family: 'Monaco', 'Consolas', monospace;
    font-weight: bold;
    color: #6c757d;
    text-align: right;
}

.result-recommendations {
    background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 100%);
    border: 1px solid #ff9800;
    border-radius: 12px;
    padding: 24px;
}

.result-recommendations h4 {
    color: #ef6c00;
    margin-bottom: 16px;
    font-size: 18px;
}

.result-recommendations p {
    margin: 12px 0;
    line-height: 1.5;
    font-size: 14px;
}

.result-recommendations p.success {
    color: var(--success-color);
    font-weight: 500;
}

.result-recommendations p.warning {
    color: var(--warning-color);
    font-weight: 500;
}

.result-recommendations p.error {
    color: var(--error-color);
    font-weight: 500;
}

/* 加载占位符美化 */
.loading-placeholder {
    text-align: center;
    padding: 40px 20px;
    color: #6c757d;
    font-style: italic;
    background: #f8f9fa;
    border-radius: 8px;
    border: 2px dashed #dee2e6;
}

/* 加载动画样式 */
.loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
    text-align: center;
    color: #6c757d;
    font-size: 16px;
}

.spinner {
    width: 40px;
    height: 40px;
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 15px;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 加载状态文字动画 */
.loading-text {
    position: relative;
}

.loading-text::after {
    content: '';
    animation: dots 1.5s infinite;
}

@keyframes dots {
    0%, 20% { content: ''; }
    40% { content: '.'; }
    60% { content: '..'; }
    80%, 100% { content: '...'; }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .metrics-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
        gap: 15px;
    }
    
    .metric-item {
        padding: 18px;
    }
    
    .metric-value {
        font-size: 1.8em;
    }
    
    .test-controls {
        flex-direction: column;
        align-items: stretch;
    }
    
    .form-select {
        min-width: auto;
    }
    
    .hop-item {
        grid-template-columns: 40px 120px 1fr 80px;
        gap: 10px;
    }
    
    .result-header,
    .result-item {
        grid-template-columns: 2fr 1fr 80px;
        gap: 10px;
    }
    
    .summary-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .nav-tabs {
        padding: 15px;
        gap: 6px;
    }
    
    .nav-tab {
        padding: 10px 14px;
        font-size: 12px;
        border-radius: 18px;
    }
    
    .header h1 {
        font-size: 2em;
    }
    
    .header p {
        font-size: 1em;
    }
    
    .hop-item {
        grid-template-columns: 30px 100px 1fr 60px;
        gap: 8px;
        font-size: 12px;
    }
    
    .result-header,
    .result-item {
        grid-template-columns: 1.5fr 1fr 60px;
        gap: 8px;
        padding: 12px 15px;
        font-size: 13px;
    }
}