/* ===== 后台管理样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: #f0f2f5;
    color: #333;
}

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

/* ===== 侧边栏 ===== */
.sidebar {
    width: 260px;
    background: #001529;
    color: #fff;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    transition: all 0.3s ease;
    z-index: 1000;
}

.sidebar.collapsed {
    width: 80px;
}

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

.sidebar-header img {
    height: 40px;
    margin-bottom: 10px;
}

.sidebar-header h2 {
    font-size: 1rem;
    font-weight: 500;
}

.sidebar.collapsed .sidebar-header h2,
.sidebar.collapsed .sidebar-nav a span,
.sidebar.collapsed .sidebar-footer a span {
    display: none;
}

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

.sidebar-nav ul li {
    margin: 5px 0;
}

.sidebar-nav ul li a {
    display: flex;
    align-items: center;
    padding: 12px 20px;
    color: rgba(255,255,255,0.7);
    transition: all 0.3s ease;
}

.sidebar-nav ul li a i {
    width: 20px;
    margin-right: 10px;
    font-size: 1.1rem;
}

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

.sidebar-footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.sidebar-footer a {
    display: block;
    padding: 10px 0;
    color: rgba(255,255,255,0.7);
    transition: color 0.3s ease;
}

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

.sidebar-footer a i {
    margin-right: 8px;
}

/* ===== 主内容区 ===== */
.main-content {
    flex: 1;
    margin-left: 260px;
    min-height: 100vh;
    transition: margin-left 0.3s ease;
}

.sidebar.collapsed + .main-content {
    margin-left: 80px;
}

/* ===== 顶部栏 ===== */
.top-header {
    background: #fff;
    padding: 0 20px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 1px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

.sidebar-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: #666;
    padding: 8px;
}

.header-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.header-right img {
    width: 35px;
    height: 35px;
    border-radius: 50%;
    background: #f0f0f0;
}

/* ===== 内容区 ===== */
.content-wrapper {
    padding: 24px;
}

.page {
    display: none;
}

.page.active {
    display: block;
}

.page-title {
    font-size: 1.5rem;
    margin-bottom: 24px;
    color: #1a1a2e;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

/* ===== 统计卡片 ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.stat-card i {
    font-size: 2.5rem;
    color: #1890ff;
    margin-right: 20px;
}

.stat-info h3 {
    font-size: 1.8rem;
    color: #1a1a2e;
    margin-bottom: 5px;
}

.stat-info p {
    color: #999;
    font-size: 0.9rem;
}

/* ===== 仪表板块 ===== */
.dashboard-sections {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
}

.section-card {
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.section-card h3 {
    margin-bottom: 16px;
    font-size: 1.1rem;
}

/* ===== 数据表格 ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid #f0f0f0;
}

.data-table th {
    background: #fafafa;
    font-weight: 600;
    color: #666;
    font-size: 0.9rem;
}

.data-table tbody tr:hover {
    background: #f5f5f5;
    transition: background 0.2s ease;
}

.data-table img {
    width: 60px;
    height: 60px;
    object-fit: cover;
    border-radius: 4px;
    display: block;
}

/* ===== 按钮 ===== */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: #1890ff;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

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

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: #fff;
    color: #666;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    border-color: #1890ff;
    color: #1890ff;
}

.btn-danger {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 20px;
    background: #ff4d4f;
    color: #fff;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

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

.btn-sm {
    padding: 4px 12px;
    font-size: 0.8rem;
}

.btn-edit {
    color: #1890ff;
    margin-right: 8px;
}

.btn-delete {
    color: #ff4d4f;
}

/* ===== 表单 ===== */
.form-card {
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
    max-width: 800px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #666;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: #1890ff;
    outline: none;
    box-shadow: 0 0 0 2px rgba(24,144,255,0.2);
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

/* ===== 筛选栏 ===== */
.filter-bar {
    display: flex;
    gap: 12px;
    margin-bottom: 20px;
}

.filter-bar input,
.filter-bar select {
    padding: 8px 12px;
    border: 1px solid #d9d9d9;
    border-radius: 4px;
    font-size: 0.9rem;
}

.filter-bar input {
    flex: 1;
    max-width: 300px;
}

/* ===== 弹窗 ===== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 10000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: #fff;
    border-radius: 8px;
    width: 90%;
    max-width: 700px;
    max-height: 90vh;
    overflow-y: auto;
    animation: modalSlideIn 0.3s ease;
}

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    font-size: 1.2rem;
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: #999;
}

.modal form {
    padding: 24px;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 设置页面 ===== */
.settings-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.setting-card {
    background: #fff;
    padding: 24px;
    border-radius: 8px;
    box-shadow: 0 1px 4px rgba(0,0,0,0.05);
}

.setting-card h3 {
    margin-bottom: 10px;
}

.setting-card p {
    color: #999;
    margin-bottom: 20px;
    font-size: 0.9rem;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .dashboard-sections {
        grid-template-columns: 1fr;
    }
    
    .settings-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .sidebar {
        width: 80px;
    }
    
    .sidebar .sidebar-header h2,
    .sidebar .sidebar-nav a span,
    .sidebar .sidebar-footer a span {
        display: none;
    }
    
    .main-content {
        margin-left: 80px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .settings-grid {
        grid-template-columns: 1fr;
    }
    
    .data-table {
        display: block;
        overflow-x: auto;
    }
}

/* ===== 消息提示 ===== */
.message {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 12px 24px;
    border-radius: 4px;
    color: #fff;
    z-index: 10001;
    animation: slideIn 0.3s ease;
}

.message-success {
    background: #52c41a;
}

.message-error {
    background: #ff4d4f;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}