:root {
    --primary: #1890ff;
    --success: #52c41a;
    --warning: #faad14;
    --error: #f5222d;
    --bg: #f0f2f5;
    --card-bg: #ffffff;
    --text: #333333;
    --text-secondary: #666666;
    --border: #e8e8e8;
    --sidebar-bg: #001529;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "PingFang SC", "Microsoft YaHei", sans-serif;
}

body {
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* 布局样式 */
.dashboard {
    display: grid;
    grid-template-columns: 250px 1fr;
    min-height: 100vh;
}

/* 移动端样式 */
@media (max-width: 768px) {
    .dashboard {
        grid-template-columns: 1fr;
    }
    
    .mobile-menu-btn {
        display: block !important;
        position: fixed;
        top: 15px;
        left: 15px;
        z-index: 1000;
        background: var(--sidebar-bg);
        color: white;
        border: none;
        padding: 10px;
        border-radius: 4px;
        font-size: 18px;
    }
    
    .mobile-overlay {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0,0,0,0.5);
        z-index: 999;
    }
    
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        position: fixed;
        z-index: 1001;
        height: 100vh;
        width: 250px;
    }
    
    .sidebar.mobile-open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: 60px 15px 15px;
    }
}

/* 侧边栏样式 */
.sidebar {
    background: var(--sidebar-bg);
    color: white;
    padding: 20px 0;
}

.logo {
    padding: 0 20px 20px;
    border-bottom: 1px solid #333;
    text-align: center;
}

.logo h1 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 5px;
}

.subtitle {
    font-size: 12px;
    color: #8c8c8c;
}

.nav-menu {
    list-style: none;
    margin-top: 20px;
}

.nav-item {
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    align-items: center;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(24, 144, 255, 0.1);
}

.nav-item.active {
    background: rgba(24, 144, 255, 0.2);
    border-left-color: var(--primary);
}

.nav-icon {
    margin-right: 10px;
    font-size: 16px;
}

/* 主内容区样式 */
.main-content {
    padding: 20px;
    overflow-y: auto;
}

.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--border);
}

.header h1 {
    font-size: 24px;
    font-weight: 600;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* 统计卡片样式 */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 1200px) {
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .stats-cards {
        grid-template-columns: 1fr;
    }
}

.stat-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.stat-value {
    font-size: 28px;
    font-weight: bold;
    margin: 10px 0;
}

.stat-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

.status-good { color: var(--success); }
.status-warning { color: var(--warning); }
.status-error { color: var(--error); }

.trend-up { color: var(--error); }
.trend-down { color: var(--success); }

/* 图表容器样式 */
.charts-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .charts-container {
        grid-template-columns: 1fr;
    }
}

.chart-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.chart-title {
    margin-bottom: 15px;
    font-size: 16px;
    font-weight: bold;
}

.full-width {
    grid-column: 1 / -1;
}

/* 预警列表样式 */
.alert-list {
    background: var(--card-bg);
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    padding: 20px;
}

.alert-item {
    display: flex;
    justify-content: space-between;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

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

.alert-level {
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    color: white;
}

.level-high { background: var(--error); }
.level-medium { background: var(--warning); }
.level-low { background: var(--primary); }

/* 按钮样式 */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
    font-size: 14px;
}

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

.btn-primary:hover {
    background: #40a9ff;
}

.btn-block {
    width: 100%;
}

.btn-large {
    padding: 12px 24px;
    font-size: 16px;
}

/* 机器人巡检样式 */
.robot-dashboard {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.robot-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

@media (max-width: 1200px) {
    .robot-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .robot-stats {
        grid-template-columns: 1fr;
    }
}

.pipeline-map {
    height: 400px;
    background: #e6f7ff;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    margin-bottom: 15px;
    border: 1px solid var(--border);
}

.robot-position-info {
    display: flex;
    justify-content: space-around;
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    margin-top: 10px;
}

@media (max-width: 768px) {
    .robot-position-info {
        flex-direction: column;
        gap: 10px;
    }
}

.sensor-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

@media (max-width: 768px) {
    .sensor-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .sensor-grid {
        grid-template-columns: 1fr;
    }
}

.sensor-item {
    background: var(--card-bg);
    padding: 15px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
}

.sensor-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.sensor-value {
    font-size: 20px;
    font-weight: bold;
    margin: 5px 0;
}

.sensor-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 能源监控样式 */
.energy-dashboard {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.energy-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    margin-bottom: 20px;
}

@media (max-width: 1200px) {
    .energy-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .energy-cards {
        grid-template-columns: 1fr;
    }
}

.energy-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    display: flex;
    align-items: center;
    gap: 15px;
}

.energy-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
}

.biogas .energy-icon { background: rgba(82, 196, 26, 0.1); }
.geothermal .energy-icon { background: rgba(24, 144, 255, 0.1); }
.solar .energy-icon { background: rgba(250, 173, 20, 0.1); }
.backup .energy-icon { background: rgba(128, 128, 128, 0.1); }

.energy-info {
    flex: 1;
}

.energy-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.energy-value {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 5px;
}

.energy-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

.energy-trend {
    font-size: 12px;
    font-weight: bold;
}

/* 能源流向图样式 */
.flow-diagram {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.flow-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding: 15px;
    background: #f8f9fa;
    border-radius: 8px;
}

@media (max-width: 768px) {
    .flow-row {
        flex-direction: column;
        gap: 10px;
    }
    
    .flow-arrow {
        transform: rotate(90deg);
    }
}

.flow-source, .flow-process, .flow-destination {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
}

.source-icon, .process-icon, .dest-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.source-label, .process-label, .dest-label {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 5px;
}

.source-value, .dest-value {
    font-size: 16px;
    font-weight: bold;
}

.flow-arrow {
    font-size: 20px;
    color: var(--primary);
    margin: 0 20px;
}

/* 能源指标样式 */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

@media (max-width: 1200px) {
    .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .metrics-grid {
        grid-template-columns: 1fr;
    }
}

.metric-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
}

.metric-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.metric-value {
    font-size: 24px;
    font-weight: bold;
    margin-bottom: 15px;
}

.metric-progress {
    margin-bottom: 10px;
}

.progress-bar {
    height: 8px;
    background: #f0f0f0;
    border-radius: 4px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--success);
    border-radius: 4px;
    transition: width 0.3s ease;
}

.metric-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 能源图表样式 */
.energy-charts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .energy-charts {
        grid-template-columns: 1fr;
    }
}

/* 用户欢迎页面样式 */
.user-welcome {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.welcome-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 500px;
    width: 100%;
}

.welcome-card h3 {
    margin-bottom: 15px;
    color: var(--text);
}

.welcome-card p {
    margin-bottom: 25px;
    color: var(--text-secondary);
}

.service-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin: 30px 0;
}

@media (max-width: 480px) {
    .service-features {
        grid-template-columns: 1fr;
    }
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px;
}

.feature-icon {
    font-size: 24px;
    margin-bottom: 8px;
}

.feature-text {
    font-size: 14px;
    color: var(--text);
}

.login-link {
    color: var(--primary);
    text-decoration: none;
}

.login-link:hover {
    text-decoration: underline;
}

/* 数据分析样式 */
.analytics-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.comparison-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

@media (max-width: 768px) {
    .comparison-cards {
        grid-template-columns: 1fr;
    }
}

.comparison-card {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-align: center;
}

.comparison-title {
    font-size: 16px;
    font-weight: bold;
    margin-bottom: 10px;
}

.comparison-value {
    font-size: 32px;
    font-weight: bold;
    margin: 15px 0;
}

.comparison-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 5px;
}

.comparison-desc {
    font-size: 12px;
    color: var(--text-secondary);
}

/* 管理员登录提示 */
.admin-login-prompt {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.admin-card {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    text-align: center;
    max-width: 400px;
    width: 100%;
}

.admin-card h3 {
    margin-bottom: 15px;
    color: var(--text);
}

.admin-card p {
    margin-bottom: 25px;
    color: var(--text-secondary);
}

/* 标签页内容控制 */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* 表单控件样式 */
.form-control {
    padding: 8px 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 14px;
    width: 100%;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(24, 144, 255, 0.2);
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: 500;
}

/* 认证页面样式 */
.auth-page {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.auth-container {
    width: 100%;
    max-width: 400px;
}

.auth-card {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    overflow: hidden;
}

.auth-header {
    background: var(--primary);
    color: white;
    padding: 30px;
    text-align: center;
}

.auth-header h1 {
    margin-bottom: 5px;
    font-size: 24px;
}

.auth-header p {
    opacity: 0.9;
    font-size: 14px;
}

.auth-tabs {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.auth-tabs .tab {
    flex: 1;
    padding: 15px;
    text-align: center;
    cursor: pointer;
    background: #f8f9fa;
    transition: all 0.3s;
}

.auth-tabs .tab.active {
    background: white;
    border-bottom: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 500;
}

.auth-form {
    padding: 30px;
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-links {
    text-align: center;
    margin-top: 20px;
}

.auth-links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 14px;
}

.auth-links a:hover {
    text-decoration: underline;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    color: white;
    font-size: 14px;
}

/* 机器人巡检动画 */
@keyframes pulse {
    0% { transform: scale(1); opacity: 1; }
    100% { transform: scale(2.5); opacity: 0; }
}

@keyframes flow {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes thermal-pulse {
    0% { transform: translate(-50%, -50%) scale(1); opacity: 0.7; }
    50% { transform: translate(-50%, -50%) scale(1.8); opacity: 0.3; }
    100% { transform: translate(-50%, -50%) scale(1); opacity: 0.7; }
}

/* 管道流动效果 */
.pipeline-segment::before {
    content: '';
    position: absolute;
    top: -1px;
    left: 0;
    right: 0;
    bottom: -1px;
    background: linear-gradient(90deg, transparent, rgba(24, 144, 255, 0.3), transparent);
    animation: flow 3s linear infinite;
}

/* 响应式设计补充 */
@media (max-width: 768px) {
    .header {
        flex-direction: column;
        align-items: flex-start;
        gap: 10px;
    }
    
    .header-controls {
        width: 100%;
        justify-content: space-between;
    }
    
    .main-content {
        padding: 60px 15px 15px;
    }
}

/* 隐藏移动端菜单按钮（默认） */
.mobile-menu-btn {
    display: none;
}