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

body {
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    font-size: 14px;
    color: #333;
    background-color: #f0f2f5;
}

a {
    text-decoration: none;
    color: #333;
}

ul {
    list-style: none;
}

/* 布局 */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: 220px;
    background-color: #001529;
    color: #fff;
    display: flex;
    flex-direction: column;
}

.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid #1f3a5f;
}

.sidebar-header h2 {
    font-size: 18px;
    color: #fff;
    text-align: center;
}

.sidebar-nav {
    flex: 1;
    padding: 15px 0;
}

.sidebar-nav ul li a {
    display: block;
    padding: 12px 25px;
    color: #a6b4cf;
    font-size: 14px;
    transition: all 0.2s;
}

.sidebar-nav ul li a:hover,
.sidebar-nav ul li a.active {
    background-color: #1890ff;
    color: #fff;
}

.sidebar-footer {
    padding: 15px;
    border-top: 1px solid #1f3a5f;
    font-size: 13px;
}

.sidebar-footer a {
    display: block;
    padding: 8px 10px;
    color: #a6b4cf;
}

.sidebar-footer a:hover {
    color: #fff;
}

/* 主内容区 */
.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.admin-header {
    background-color: #fff;
    padding: 15px 25px;
    border-bottom: 1px solid #e8e8e8;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header h1 {
    font-size: 18px;
    font-weight: normal;
}

.admin-user {
    color: #666;
    font-size: 13px;
}

.admin-content {
    flex: 1;
    padding: 20px 25px;
}

/* 登录页 */
.login-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.login-box {
    width: 360px;
    background-color: #fff;
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.login-box h2 {
    text-align: center;
    margin-bottom: 25px;
    color: #333;
}

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

.login-box label {
    display: block;
    margin-bottom: 8px;
    color: #666;
}

.login-box input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
}

.login-box input:focus {
    outline: none;
    border-color: #1890ff;
}

.login-box .btn-login {
    width: 100%;
    padding: 12px;
    background-color: #1890ff;
    color: #fff;
    border: none;
    border-radius: 4px;
    font-size: 15px;
    cursor: pointer;
}

.login-box .btn-login:hover {
    background-color: #096dd9;
}

.login-error {
    color: #e64340;
    font-size: 13px;
    margin-bottom: 15px;
    text-align: center;
}

/* 数据卡片 */
.stats-cards {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 20px;
    text-align: center;
}

.stat-card .num {
    font-size: 32px;
    font-weight: bold;
    color: #1890ff;
    margin-bottom: 8px;
}

.stat-card .label {
    color: #999;
    font-size: 13px;
}

.stat-card.success .num {
    color: #52c41a;
}

.stat-card.warning .num {
    color: #faad14;
}

.stat-card.danger .num {
    color: #e64340;
}

/* 表格 */
.table-card {
    background-color: #fff;
    border-radius: 8px;
    overflow: hidden;
}

.table-header {
    padding: 15px 20px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.table-header h3 {
    font-size: 16px;
    font-weight: normal;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 20px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

.data-table th {
    background-color: #fafafa;
    font-weight: normal;
    color: #666;
    font-size: 13px;
}

.data-table tr:hover {
    background-color: #fafafa;
}

/* 状态标签 */
.status-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 10px;
    font-size: 12px;
}

.status-pending {
    background-color: #fff7e6;
    color: #fa8c16;
}

.status-approved {
    background-color: #f6ffed;
    color: #52c41a;
}

.status-rejected {
    background-color: #fff1f0;
    color: #e64340;
}

/* 操作按钮 */
.btn {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 4px;
    font-size: 13px;
    cursor: pointer;
    border: none;
    margin-right: 5px;
}

.btn-primary {
    background-color: #1890ff;
    color: #fff;
}

.btn-primary:hover {
    background-color: #096dd9;
}

.btn-success {
    background-color: #52c41a;
    color: #fff;
}

.btn-success:hover {
    background-color: #389e0d;
}

.btn-danger {
    background-color: #e64340;
    color: #fff;
}

.btn-danger:hover {
    background-color: #cf1322;
}

.btn-default {
    background-color: #f0f0f0;
    color: #666;
}

.btn-default:hover {
    background-color: #e0e0e0;
}

.btn-warning {
    background-color: #faad14;
    color: #fff;
}

.btn-warning:hover {
    background-color: #d48806;
}

/* 表单 */
.form-card {
    background-color: #fff;
    border-radius: 8px;
    padding: 25px;
    max-width: 600px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #666;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.form-actions {
    margin-top: 25px;
}

.form-actions .btn {
    padding: 8px 25px;
    font-size: 14px;
}

/* 提示消息 */
.alert {
    padding: 12px 15px;
    border-radius: 4px;
    margin-bottom: 20px;
    font-size: 13px;
}

.alert-success {
    background-color: #f6ffed;
    border: 1px solid #b7eb8f;
    color: #389e0d;
}

.alert-error {
    background-color: #fff1f0;
    border: 1px solid #ffa39e;
    color: #cf1322;
}

/* 分页 */
.pagination {
    padding: 15px 20px;
    text-align: right;
    color: #999;
    font-size: 13px;
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        width: 60px;
    }
    
    .sidebar-header h2,
    .sidebar-nav ul li a span,
    .sidebar-footer a {
        display: none;
    }
    
    .sidebar-nav ul li a {
        text-align: center;
        padding: 12px 0;
        font-size: 18px;
    }
    
    .admin-content {
        padding: 15px;
    }
    
    .stats-cards {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .data-table th,
    .data-table td {
        padding: 10px 12px;
        font-size: 13px;
    }
}