/* =========================================
   后台管理系统 - 样式表
   ========================================= */

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

:root {
    --primary-color: #1890ff;
    --primary-dark: #096dd9;
    --success-color: #52c41a;
    --warning-color: #faad14;
    --danger-color: #ff4d4f;
    --text-color: #333;
    --text-light: #666;
    --text-secondary: #999;
    --border-color: #e8e8e8;
    --bg-light: #f5f5f5;
    --bg-primary: #f0f2f5;
    --white: #fff;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    --sidebar-width: 200px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-primary);
}

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

.login-box {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 400px;
}

.login-box h1 {
    text-align: center;
    font-size: 20px;
    margin-bottom: 30px;
    color: var(--text-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
}

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

.btn-success:hover {
    background: #3b9e1f;
}

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

.btn-danger:hover {
    background: #d93636;
}

.btn-secondary {
    background: var(--bg-light);
    color: var(--text-color);
}

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

.btn-block {
    width: 100%;
    padding: 12px;
}

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

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--white);
    box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-header {
    height: 60px;
    background: var(--primary-color);
    color: var(--white);
    display: flex;
    align-items: center;
    padding: 0 20px;
    font-size: 16px;
    font-weight: bold;
}

.sidebar-nav {
    padding: 20px 0;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: var(--text-color);
    text-decoration: none;
    transition: all 0.3s;
}

.sidebar-nav a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.sidebar-nav a.active {
    background: #e6f7ff;
    color: var(--primary-color);
    border-right: 3px solid var(--primary-color);
}

.sidebar-nav .icon {
    margin-right: 10px;
    font-size: 18px;
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    padding: 20px;
}

/* 顶部栏 */
.topbar {
    background: var(--white);
    padding: 15px 25px;
    border-radius: 8px;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

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

.topbar .user-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.topbar .user-info span {
    color: var(--text-light);
}

/* 内容卡片 */
.content-card {
    background: var(--white);
    border-radius: 8px;
    padding: 25px;
    box-shadow: var(--shadow);
}

/* 表格 */
.table-wrapper {
    overflow-x: auto;
}

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

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

table th {
    background: var(--bg-light);
    font-weight: 500;
    color: var(--text-color);
}

table tr:hover {
    background: #fafafa;
}

table .actions {
    display: flex;
    gap: 8px;
}

table .actions button {
    padding: 5px 12px;
    font-size: 12px;
}

/* 图片缩略图 */
.thumbnail {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
    background: var(--bg-light);
}

/* 状态标签 */
.status-tag {
    padding: 2px 8px;
    border-radius: 3px;
    font-size: 12px;
}

.status-tag.active {
    background: #f6ffed;
    color: var(--success-color);
    border: 1px solid #b7eb8f;
}

.status-tag.inactive {
    background: #fff1f0;
    color: var(--danger-color);
    border: 1px solid #ffccc7;
}

.status-tag.recommended {
    background: #fff7e6;
    color: var(--warning-color);
    border: 1px solid #ffd591;
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 20px;
}

.pagination button {
    padding: 8px 14px;
    border: 1px solid var(--border-color);
    background: var(--white);
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s;
}

.pagination button:hover:not(:disabled) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.pagination button.active {
    background: var(--primary-color);
    border-color: var(--primary-color);
    color: var(--white);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* 模态框 */
.modal {
    display: none;
    position: fixed;
    left: 0;
    top: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--white);
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 25px;
}

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

.modal-header h3 {
    font-size: 18px;
}

.modal-close {
    font-size: 24px;
    cursor: pointer;
    color: var(--text-light);
    background: none;
    border: none;
}

.modal-close:hover {
    color: var(--text-color);
}

.modal-footer {
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* 表单布局 */
.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.form-row.full {
    grid-template-columns: 1fr;
}

/* 图片上传 */
.upload-box {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 30px;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.3s;
}

.upload-box:hover {
    border-color: var(--primary-color);
}

.upload-box input {
    display: none;
}

.upload-box .icon {
    font-size: 40px;
    color: var(--text-secondary);
    margin-bottom: 10px;
}

.upload-box p {
    color: var(--text-light);
    font-size: 13px;
}

.preview-image {
    max-width: 200px;
    max-height: 150px;
    margin-top: 10px;
    border-radius: 4px;
}

/* 工具栏 */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.toolbar-left {
    display: flex;
    gap: 15px;
    align-items: center;
}

.toolbar-left input,
.toolbar-left select {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 13px;
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    color: var(--text-light);
}

.empty-state .icon {
    font-size: 60px;
    margin-bottom: 20px;
}

.empty-state h3 {
    font-size: 18px;
    margin-bottom: 10px;
    color: var(--text-color);
}

/* 加载状态 */
.loading {
    text-align: center;
    padding: 40px;
    color: var(--text-light);
}

.loading::after {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--primary-color);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-left: 10px;
    vertical-align: middle;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 响应式 */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s;
    }
    
    .sidebar.show {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* 确认框 */
.confirm-box {
    text-align: center;
}

.confirm-box .icon {
    font-size: 50px;
    margin-bottom: 15px;
}

.confirm-box h3 {
    margin-bottom: 10px;
}

.confirm-box p {
    color: var(--text-light);
    margin-bottom: 20px;
}