/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --primary-dark: #5568d3;
    --secondary-color: #764ba2;
    --success-color: #10b981;
    --warning-color: #f59e0b;
    --danger-color: #ef4444;
    --info-color: #3b82f6;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 
                 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    background: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 24px;
    width: 100%;
}

/* 顶部导航栏 */
.header {
    background: var(--card-bg);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.nav {
    display: flex;
    gap: 8px;
}

.nav-item {
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 500;
    transition: all 0.2s;
}

.nav-item:hover {
    background: var(--bg-color);
    color: var(--primary-color);
}

.nav-item.active {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.notification {
    position: relative;
    cursor: pointer;
    color: var(--text-secondary);
    transition: color 0.2s;
}

.notification:hover {
    color: var(--primary-color);
}

.notification .badge {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--danger-color);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 10px;
    min-width: 18px;
    text-align: center;
}

.avatar {
    width: 36px;
    height: 36px;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    cursor: pointer;
    transition: transform 0.2s;
}

.avatar:hover {
    transform: scale(1.05);
}

/* 主内容区域 */
.main {
    flex: 1;
    padding: 32px 0;
}

/* 统计卡片网格 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-md);
    transition: all 0.3s;
    border: 1px solid var(--border-color);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
}

.stat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.stat-title {
    font-size: 14px;
    color: var(--text-secondary);
    font-weight: 500;
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s;
}

.stat-icon:hover {
    transform: rotate(10deg) scale(1.05);
}

.stat-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success-color);
}

.stat-icon.info {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

.stat-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
}

.stat-footer {
    display: flex;
    align-items: center;
    gap: 8px;
}

.trend {
    font-size: 14px;
    font-weight: 600;
    padding: 4px 8px;
    border-radius: 6px;
}

.trend.up {
    color: var(--success-color);
    background: rgba(16, 185, 129, 0.1);
}

.trend.down {
    color: var(--danger-color);
    background: rgba(239, 68, 68, 0.1);
}

.stat-sub {
    font-size: 13px;
    color: var(--text-secondary);
}

/* 内容网格 */
.content-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 24px;
    margin-bottom: 32px;
}

/* 卡片通用样式 */
.card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border-color);
}

.card-header h2 {
    font-size: 18px;
    font-weight: 700;
    color: var(--text-primary);
}

.btn-icon {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--bg-color);
    border-radius: 8px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: all 0.2s;
}

.btn-icon:hover {
    background: var(--primary-color);
    color: white;
    transform: rotate(90deg);
}

/* 预警列表 */
.alert-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-height: 520px;
    overflow-y: auto;
    padding-right: 8px;
}

.alert-list::-webkit-scrollbar {
    width: 6px;
}

.alert-list::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 3px;
}

.alert-list::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

.alert-list::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.alert-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
    background: var(--bg-color);
    border-radius: 12px;
    border-left: 4px solid transparent;
    transition: all 0.2s;
    cursor: pointer;
}

.alert-item:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-md);
}

.alert-item.critical {
    border-left-color: var(--danger-color);
}

.alert-item.warning {
    border-left-color: var(--warning-color);
}

.alert-item.info {
    border-left-color: var(--info-color);
}

.alert-status {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 6px;
}

.alert-item.critical .alert-status {
    background: var(--danger-color);
    box-shadow: 0 0 0 4px rgba(239, 68, 68, 0.2);
    animation: pulse 2s infinite;
}

.alert-item.warning .alert-status {
    background: var(--warning-color);
    box-shadow: 0 0 0 4px rgba(245, 158, 11, 0.2);
}

.alert-item.info .alert-status {
    background: var(--info-color);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.2);
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.alert-desc {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

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

.alert-badge {
    padding: 4px 12px;
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    white-space: nowrap;
}

.critical-badge {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger-color);
}

.warning-badge {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning-color);
}

.info-badge {
    background: rgba(59, 130, 246, 0.1);
    color: var(--info-color);
}

/* 图表卡片 */
.chart-tabs {
    display: flex;
    gap: 8px;
}

.chart-tab {
    padding: 6px 16px;
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.chart-tab:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

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

.chart-container {
    margin: 20px 0;
}

.chart-placeholder {
    width: 100%;
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.chart-legend {
    display: flex;
    gap: 24px;
    justify-content: center;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.legend-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

/* 支付渠道卡片 */
.channel-card {
    margin-bottom: 32px;
}

.update-time {
    font-size: 13px;
    color: var(--text-secondary);
}

.channel-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.channel-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 20px;
    background: var(--bg-color);
    border-radius: 12px;
    transition: all 0.2s;
    border: 2px solid transparent;
}

.channel-item:hover {
    background: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.channel-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.channel-info {
    flex: 1;
}

.channel-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.channel-status {
    font-size: 13px;
    font-weight: 500;
}

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

.channel-status.warning {
    color: var(--warning-color);
}

.channel-stats {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.channel-stat {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

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

.stat-value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

/* 系统过期弹窗 */
.modal-overlay {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: auto;
    height: auto;
    background: transparent;
    display: none;
    z-index: 9999;
    animation: fadeIn 0.3s ease;
    pointer-events: none;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-container {
    background: white;
    border-radius: 16px;
    padding: 24px 32px;
    max-width: 600px;
    width: auto;
    min-width: 400px;
    box-shadow: 0 10px 40px rgba(239, 68, 68, 0.3);
    animation: slideDown 0.4s ease;
    text-align: center;
    pointer-events: auto;
    border: 3px solid var(--danger-color);
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideDown {
    from {
        transform: translateY(-30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-icon {
    display: none;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-10px); }
    75% { transform: translateX(10px); }
}

.modal-content {
    margin-bottom: 0;
}

.modal-title {
    font-size: 18px;
    font-weight: 700;
    color: var(--danger-color);
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.modal-title::before {
    content: "⚠️";
    font-size: 20px;
}

.modal-message {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 16px;
}

.modal-info {
    background: var(--bg-color);
    border-radius: 8px;
    padding: 12px 16px;
    display: flex;
    gap: 24px;
    text-align: left;
    justify-content: center;
}

.info-item {
    display: flex;
    gap: 6px;
    align-items: center;
}

.info-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    font-size: 13px;
    color: var(--text-primary);
    font-weight: 600;
}

.expire-notice {
    display: none;
}

/* 防止用户选择文本 */
.modal-overlay * {
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

/* 页脚 */
.footer {
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    padding: 24px 0;
    margin-top: auto;
}

.footer p {
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .content-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .header .container {
        flex-wrap: wrap;
        height: auto;
        padding: 16px 24px;
    }
    
    .nav {
        order: 3;
        width: 100%;
        margin-top: 16px;
        overflow-x: auto;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .channel-grid {
        grid-template-columns: 1fr;
    }
    
    .alert-list {
        max-height: 400px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .main {
        padding: 20px 0;
    }
    
    .stat-card,
    .card {
        padding: 16px;
    }
    
    .stat-value {
        font-size: 24px;
    }
    
    .logo span {
        display: none;
    }
}