* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: #333;
    background: #f5f7fa;
}

a {
    color: #1890ff;
    text-decoration: none;
}

a:hover {
    color: #40a9ff;
}

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

.login-box {
    width: 360px;
    padding: 40px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.15);
}

.login-box h1 {
    text-align: center;
    margin-bottom: 30px;
    font-size: 24px;
    color: #333;
}

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

.login-box label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}

.login-box input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 14px;
}

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

.btn {
    display: inline-block;
    padding: 8px 16px;
    border: 1px solid transparent;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    line-height: 1.5;
    transition: all 0.3s;
}

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

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

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

.btn-success:hover {
    background: #73d13d;
}

.btn-danger {
    background: #ff4d4f;
    color: #fff;
}

.btn-danger:hover {
    background: #ff7875;
}

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

.btn-sm {
    padding: 4px 10px;
    font-size: 12px;
}

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

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

.sidebar {
    width: 220px;
    background: #001529;
    color: #fff;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

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

.sidebar-header h2 {
    font-size: 18px;
    font-weight: 500;
}

.sidebar-header p {
    font-size: 12px;
    color: rgba(255,255,255,0.6);
    margin-top: 4px;
}

.sidebar-menu {
    list-style: none;
    padding: 10px 0;
}

.sidebar-menu li a {
    display: block;
    padding: 12px 20px;
    color: rgba(255,255,255,0.7);
    transition: all 0.3s;
}

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

.main-content {
    flex: 1;
    margin-left: 220px;
    padding: 20px;
}

.top-bar {
    background: #fff;
    padding: 15px 20px;
    border-radius: 4px;
    margin-bottom: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.top-bar h1 {
    font-size: 20px;
    font-weight: 500;
}

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

.user-info a {
    margin-left: 15px;
    color: #999;
}

/* 卡片 */
.card {
    background: #fff;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 20px;
}

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

.card-header h2 {
    font-size: 16px;
    font-weight: 500;
}

.card-body {
    padding: 20px;
}

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.stat-card {
    background: #fff;
    padding: 20px;
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.stat-card h3 {
    font-size: 14px;
    color: #666;
    margin-bottom: 10px;
}

.stat-card .num {
    font-size: 32px;
    font-weight: 600;
    color: #333;
}

/* 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 #f0f0f0;
}

.data-table th {
    background: #fafafa;
    font-weight: 500;
    color: #666;
}

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

.status-dot {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    margin-right: 5px;
}

.status-success { background: #52c41a; }
.status-error { background: #ff4d4f; }
.status-pending { background: #d9d9d9; }

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
}

.form-group input[type="text"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 9px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #1890ff;
}

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

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.form-help {
    font-size: 12px;
    color: #999;
    margin-top: 4px;
}

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

.alert-success {
    background: #f6ffed;
    border: 1px solid #b7eb8f;
    color: #52c41a;
}

.alert-error {
    background: #fff2f0;
    border: 1px solid #ffccc7;
    color: #ff4d4f;
}

.alert-info {
    background: #e6f7ff;
    border: 1px solid #91d5ff;
    color: #1890ff;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    margin-top: 20px;
    gap: 5px;
}

.pagination a,
.pagination span {
    padding: 6px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    color: #333;
}

.pagination a:hover {
    border-color: #1890ff;
    color: #1890ff;
}

.pagination .current {
    background: #1890ff;
    color: #fff;
    border-color: #1890ff;
}

/* 日志 */
.log-item {
    padding: 10px 0;
    border-bottom: 1px solid #f0f0f0;
    font-size: 13px;
}

.log-time {
    color: #999;
    margin-right: 10px;
}

.log-success { color: #52c41a; }
.log-error { color: #ff4d4f; }

/* 空状态 */
.empty {
    text-align: center;
    padding: 60px 20px;
    color: #999;
}

/* 操作按钮组 */
.actions {
    display: flex;
    gap: 8px;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        position: relative;
        height: auto;
    }
    .main-content {
        margin-left: 0;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
}