/* 后台管理样式 */
:root {
    --admin-primary: #1a237e;
    --admin-primary-light: #283593;
    --admin-accent: #1565c0;
    --admin-bg: #f4f6f9;
    --admin-sidebar: #1a237e;
    --admin-sidebar-hover: #283593;
    --admin-text: #333;
    --admin-border: #e0e0e0;
    --admin-white: #fff;
    --admin-shadow: 0 1px 3px rgba(0,0,0,0.1);
    --admin-radius: 4px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: "Microsoft YaHei", sans-serif;
    font-size: 14px;
    background: var(--admin-bg);
    color: var(--admin-text);
}

.admin-wrapper {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.admin-sidebar {
    width: 220px;
    background: var(--admin-sidebar);
    color: rgba(255,255,255,0.8);
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
}
.admin-brand {
    padding: 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    text-align: center;
}
.admin-brand h3 {
    color: #fff;
    font-size: 18px;
}
.admin-brand p {
    font-size: 12px;
    margin-top: 5px;
    opacity: 0.7;
}
.admin-nav {
    flex: 1;
    padding: 10px 0;
}
.admin-nav a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255,255,255,0.8);
    font-size: 14px;
    transition: all 0.2s;
    gap: 10px;
}
.admin-nav a:hover,
.admin-nav a.active {
    background: var(--admin-sidebar-hover);
    color: #fff;
}
.admin-nav .nav-icon {
    width: 20px;
    text-align: center;
    font-size: 16px;
}
.admin-sidebar-footer {
    padding: 15px 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 12px;
    text-align: center;
    opacity: 0.6;
}

/* 主内容区 */
.admin-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}
.admin-header {
    background: #fff;
    padding: 0 25px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--admin-shadow);
    position: sticky;
    top: 0;
    z-index: 10;
}
.admin-header-left {
    display: flex;
    align-items: center;
    gap: 20px;
}
.breadcrumb-admin {
    font-size: 14px;
    color: #666;
}
.breadcrumb-admin a { color: var(--admin-accent); }
.admin-header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}
.admin-user {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
}
.admin-avatar {
    width: 32px;
    height: 32px;
    background: var(--admin-accent);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
}

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

/* 统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}
.stat-card {
    background: #fff;
    border-radius: var(--admin-radius);
    padding: 20px;
    box-shadow: var(--admin-shadow);
    display: flex;
    align-items: center;
    gap: 15px;
}
.stat-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    flex-shrink: 0;
}
.stat-icon.blue { background: #e3f2fd; color: #1565c0; }
.stat-icon.green { background: #e8f5e9; color: #2e7d32; }
.stat-icon.orange { background: #fff3e0; color: #e65100; }
.stat-icon.red { background: #ffebee; color: #c62828; }
.stat-info h3 {
    font-size: 24px;
    color: var(--admin-text);
    margin-bottom: 3px;
}
.stat-info p {
    font-size: 13px;
    color: #888;
}

/* 面板 */
.admin-panel {
    background: #fff;
    border-radius: var(--admin-radius);
    box-shadow: var(--admin-shadow);
    margin-bottom: 20px;
}
.panel-header {
    padding: 15px 20px;
    border-bottom: 1px solid var(--admin-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.panel-title {
    font-size: 16px;
    font-weight: 500;
}
.panel-body {
    padding: 20px;
}

/* 表格 */
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
}
.admin-table th,
.admin-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--admin-border);
}
.admin-table th {
    background: #f8f9fa;
    font-weight: 500;
    color: #666;
    font-size: 13px;
}
.admin-table tr:hover {
    background: #f8f9fa;
}
.admin-table td img {
    width: 50px;
    height: 50px;
    object-fit: cover;
    border-radius: 4px;
    border: 1px solid var(--admin-border);
}

/* 按钮 */
.admin-btn {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    border-radius: var(--admin-radius);
    font-size: 13px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}
.admin-btn-primary {
    background: var(--admin-accent);
    color: #fff;
}
.admin-btn-primary:hover { background: #0d47a1; }
.admin-btn-success {
    background: #2e7d32;
    color: #fff;
}
.admin-btn-danger {
    background: #c62828;
    color: #fff;
}
.admin-btn-secondary {
    background: #f5f5f5;
    color: #333;
    border: 1px solid var(--admin-border);
}
.admin-btn-sm { padding: 4px 10px; font-size: 12px; }
.admin-btn-lg { padding: 10px 24px; font-size: 14px; }

/* 表单 */
.admin-form .form-group {
    margin-bottom: 18px;
}
.admin-form label {
    display: block;
    font-size: 13px;
    color: #555;
    margin-bottom: 6px;
    font-weight: 500;
}
.admin-form .form-control {
    width: 100%;
    padding: 8px 12px;
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius);
    font-size: 13px;
    outline: none;
    font-family: inherit;
}
.admin-form .form-control:focus {
    border-color: var(--admin-accent);
    box-shadow: 0 0 0 2px rgba(21,101,192,0.1);
}
.admin-form textarea.form-control {
    resize: vertical;
    min-height: 100px;
}
.admin-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}
.admin-form .form-hint {
    font-size: 12px;
    color: #888;
    margin-top: 5px;
}

/* 分页 */
.admin-pagination {
    display: flex;
    justify-content: center;
    gap: 5px;
    margin-top: 20px;
}
.admin-pagination a,
.admin-pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 32px;
    height: 32px;
    padding: 0 10px;
    border-radius: var(--admin-radius);
    font-size: 13px;
    border: 1px solid var(--admin-border);
    background: #fff;
    color: #333;
}
.admin-pagination a:hover {
    background: var(--admin-accent);
    color: #fff;
    border-color: var(--admin-accent);
}
.admin-pagination span.current {
    background: var(--admin-accent);
    color: #fff;
    border-color: var(--admin-accent);
}

/* 状态标签 */
.status-tag {
    display: inline-block;
    padding: 2px 10px;
    border-radius: 3px;
    font-size: 12px;
}
.status-tag.warning { background: #fff3cd; color: #856404; }
.status-tag.info { background: #d1ecf1; color: #0c5460; }
.status-tag.success { background: #d4edda; color: #155724; }
.status-tag.danger { background: #f8d7da; color: #721c24; }

/* 登录页 */
.admin-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--admin-sidebar);
}
.admin-login-box {
    background: #fff;
    padding: 40px;
    border-radius: 8px;
    width: 100%;
    max-width: 400px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
}
.admin-login-box h2 {
    text-align: center;
    margin-bottom: 25px;
    color: var(--admin-sidebar);
}
.admin-login-box .form-group {
    margin-bottom: 20px;
}
.admin-login-box label {
    display: block;
    font-size: 13px;
    color: #555;
    margin-bottom: 6px;
}
.admin-login-box input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius);
    font-size: 14px;
    outline: none;
}
.admin-login-box input:focus {
    border-color: var(--admin-accent);
}
.admin-login-box button {
    width: 100%;
    padding: 12px;
    background: var(--admin-accent);
    color: #fff;
    border: none;
    border-radius: var(--admin-radius);
    font-size: 15px;
    cursor: pointer;
    margin-top: 10px;
}
.admin-login-box button:hover { background: #0d47a1; }

/* 筛选栏 */
.filter-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}
.filter-bar input,
.filter-bar select {
    padding: 6px 10px;
    border: 1px solid var(--admin-border);
    border-radius: var(--admin-radius);
    font-size: 13px;
    outline: none;
}

/* 响应式 */
@media (max-width: 768px) {
    .admin-sidebar { display: none; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .admin-form .form-row { grid-template-columns: 1fr; }
}