/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary-color: #4CAF50;
    --primary-dark: #388E3C;
    --secondary-color: #2196F3;
    --secondary-dark: #1976D2;
    --accent-color: #FF9800;
    --danger-color: #F44336;
    --warning-color: #FFC107;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --gray-color: #6c757d;
    --light-gray: #e9ecef;
    --border-radius: 8px;
    --box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
}

body {
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
}

a {
    text-decoration: none;
    color: var(--secondary-color);
}

a:hover {
    color: var(--secondary-dark);
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    border-radius: var(--border-radius);
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

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

.btn-secondary:hover {
    background-color: var(--secondary-dark);
    transform: translateY(-2px);
    box-shadow: var(--box-shadow);
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-sm {
    padding: 6px 12px;
    font-size: 0.9rem;
}

/* 登录页面样式 */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
}

.login-container {
    width: 100%;
    max-width: 450px;
    padding: 20px;
}

.login-header {
    text-align: center;
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 10px;
}

.logo i {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-right: 10px;
}

.logo h1 {
    font-size: 2.2rem;
    color: var(--dark-color);
}

.tagline {
    color: var(--gray-color);
    font-size: 1.1rem;
}

.login-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 30px;
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
}

.login-card h2 {
    margin-bottom: 25px;
    text-align: center;
    color: var(--dark-color);
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-group label i {
    margin-right: 8px;
    width: 20px;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ddd;
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus {
    border-color: var(--primary-color);
    outline: none;
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.demo-accounts {
    margin-top: 25px;
    padding: 15px;
    background-color: var(--light-gray);
    border-radius: var(--border-radius);
    font-size: 0.9rem;
}

.demo-accounts p {
    font-weight: 600;
    margin-bottom: 8px;
}

.demo-accounts ul {
    list-style-type: none;
    padding-left: 0;
}

.demo-accounts li {
    margin-bottom: 5px;
    padding-left: 5px;
}

.login-footer {
    text-align: center;
    color: var(--gray-color);
    font-size: 0.9rem;
}

.login-footer p {
    margin-bottom: 5px;
}

/* 仪表板布局 */
.dashboard {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏样式 */
.sidebar {
    width: 250px;
    background: linear-gradient(to bottom, var(--primary-dark), var(--primary-color));
    color: white;
    padding: 20px 0;
    position: fixed;
    height: 100%;
    overflow-y: auto;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.sidebar-header {
    padding: 0 20px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: 20px;
}

.sidebar-header .logo {
    display: flex;
    align-items: center;
    justify-content: flex-start;
}

.sidebar-header .logo i {
    font-size: 1.8rem;
    margin-right: 10px;
}

.sidebar-header .logo h2 {
    font-size: 1.5rem;
}

.sidebar-menu {
    list-style: none;
    padding: 0;
}

.sidebar-menu li {
    margin-bottom: 5px;
}

.sidebar-menu a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.9);
    transition: var(--transition);
}

.sidebar-menu a:hover,
.sidebar-menu a.active {
    background-color: rgba(255, 255, 255, 0.1);
    color: white;
    border-left: 4px solid white;
}

.sidebar-menu a i {
    width: 24px;
    margin-right: 10px;
    font-size: 1.1rem;
}

.sidebar-footer {
    padding: 20px;
    margin-top: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.7);
}

/* 主内容区域 */
.main-content {
    flex: 1;
    margin-left: 250px;
    padding: 20px;
}

/* 顶部导航栏 */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
    margin-bottom: 25px;
    border-bottom: 1px solid var(--light-gray);
}

.page-title h1 {
    font-size: 1.8rem;
    color: var(--dark-color);
}

.page-title p {
    color: var(--gray-color);
    font-size: 0.95rem;
}

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

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--primary-color);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 10px;
    font-weight: bold;
}

.user-details {
    display: flex;
    flex-direction: column;
}

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

.user-role {
    font-size: 0.85rem;
    color: var(--gray-color);
}

.logout-btn {
    margin-left: 20px;
    padding: 8px 15px;
}

/* 卡片样式 */
.card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    margin-bottom: 20px;
    overflow: hidden;
    transition: var(--transition);
}

.card:hover {
    box-shadow: var(--box-shadow-hover);
}

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

.card-header h3 {
    font-size: 1.2rem;
    color: var(--dark-color);
}

.card-body {
    padding: 20px;
}

/* 网格系统 */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.col {
    flex: 1;
    padding: 0 10px;
}

.col-12 { flex: 0 0 100%; max-width: 100%; }
.col-6 { flex: 0 0 50%; max-width: 50%; }
.col-4 { flex: 0 0 33.333%; max-width: 33.333%; }
.col-3 { flex: 0 0 25%; max-width: 25%; }

/* 图表容器 */
.chart-container {
    height: 300px;
    width: 100%;
    margin-top: 15px;
}

/* 数据表格 */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--light-gray);
}

.data-table th {
    background-color: var(--light-gray);
    font-weight: 600;
    color: var(--dark-color);
}

.data-table tr:hover {
    background-color: rgba(0, 0, 0, 0.02);
}

/* 状态标签 */
.status {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-success {
    background-color: rgba(76, 175, 80, 0.1);
    color: var(--primary-dark);
}

.status-warning {
    background-color: rgba(255, 193, 7, 0.1);
    color: #d39e00;
}

.status-danger {
    background-color: rgba(244, 67, 54, 0.1);
    color: var(--danger-color);
}

/* 指标卡片 */
.metric-card {
    text-align: center;
    padding: 20px;
}

.metric-value {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 10px 0;
}

.metric-label {
    color: var(--gray-color);
    font-size: 0.9rem;
}

/* 表单样式 */
.form-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -10px;
}

.form-col {
    flex: 1;
    padding: 0 10px;
    min-width: 250px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .col-4 { flex: 0 0 50%; max-width: 50%; }
    .col-3 { flex: 0 0 50%; max-width: 50%; }
}

@media (max-width: 768px) {
    .sidebar {
        width: 70px;
    }
    
    .sidebar-header .logo h2,
    .sidebar-menu a span,
    .sidebar-footer {
        display: none;
    }
    
    .sidebar-menu a {
        justify-content: center;
        padding: 15px 0;
    }
    
    .sidebar-menu a i {
        margin-right: 0;
        font-size: 1.3rem;
    }
    
    .main-content {
        margin-left: 70px;
    }
    
    .col-4, .col-3, .col-6 {
        flex: 0 0 100%;
        max-width: 100%;
    }
}