/* =====================================================
   PureStock 简洁素材管理系统 - 全局样式
   ===================================================== */

/* CSS变量 */
:root {
    --primary-color: #333333;
    --accent-color: #0066FF;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-light: #666666;
    --border-color: #e5e5e5;
    --success-color: #27ae60;
    --danger-color: #e74c3c;
    --warning-color: #f39c12;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 8px;
    --transition: all 0.3s ease;
}

/* 重置样式 */
* {
    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: var(--text-color);
    background-color: var(--bg-color);
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: #0052cc;
}

img {
    max-width: 100%;
    height: auto;
}

/* 布局容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航 */
.header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 60px;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    padding-top: 5px;
}
.logo img {
    height: 40px;
    width: auto;
}

.logo span {
    color: var(--accent-color);
}

.nav {
    display: flex;
    gap: 30px;
    margin-left: auto;
    margin-right: 20px;
}

.nav a {
    color: var(--text-color);
    font-weight: 500;
}

.nav a:hover,
.nav a.active {
    color: var(--accent-color);
}

.header-actions {
    display: flex;
    gap: 15px;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

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

.btn-primary:hover {
    background: #0052cc;
    color: white;
}

.btn-secondary {
    background: var(--bg-color);
    color: var(--text-color);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: #e5e5e5;
}

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

.btn-danger:hover {
    background: #c0392b;
}

.btn-sm {
    padding: 5px 12px;
    font-size: 12px;
}

/* 搜索框 */
.search-box {
    position: relative;
    width: 100%;
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    width: 100%;
    padding: 15px 50px 15px 20px;
    font-size: 16px;
    border: 2px solid var(--border-color);
    border-radius: 50px;
    outline: none;
    transition: var(--transition);
}

.search-box input:focus {
    border-color: var(--accent-color);
}

.search-box button {
    position: absolute;
    right: 5px;
    top: 50%;
    transform: translateY(-50%);
    width: 40px;
    height: 40px;
    border: none;
    background: var(--accent-color);
    color: white;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.search-box button:hover {
    background: #0052cc;
}

/* Hero区域 */
/* Hero区域 */
.hero {
    padding: 50px 0;
    margin-bottom: 30px;
    text-align: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    pointer-events: none;
}

.hero h1 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #ffffff;
    position: relative;
    text-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.hero p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 40px;
    position: relative;
}
/* 分类标签 */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
}
.category-tab {
    padding: 8px 20px;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    color: var(--text-color);
    font-size: 14px;
    cursor: pointer;
    transition: var(--transition);
}

.category-tab:hover,
.category-tab.active {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
}
/* 分类展开/折叠样式 */
.category-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    align-items: center;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
}

.category-item-wrapper {
    display: inline-block;
}

.category-parent {
    display: flex;
    align-items: center;
    gap: 5px;
    white-space: nowrap;
}

.category-sub-tabs {
    display: none;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 15px;
    padding-top: 15px;
    border-top: 1px dashed var(--border-color);
    width: 100%;
}

.category-sub-tabs.show {
    display: flex;
}

.category-sub-tabs .category-tab {
    font-size: 13px;
    padding: 5px 15px;
}

/* 面包屑 */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px 0;
    font-size: 14px;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--text-light);
}

.breadcrumb a:hover {
    color: var(--accent-color);
}

.breadcrumb span {
    color: var(--text-color);
}

/* 素材网格 */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 30px;
}

.material-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.material-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.12);
}

.material-card-image {
    position: relative;
    aspect-ratio: 1;
    overflow: hidden;
    background: #f0f0f0;
}

.material-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.material-card-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    opacity: 0;
    transition: var(--transition);
}

.material-card:hover .material-card-overlay {
    opacity: 1;
}

.material-card-info {
    padding: 15px;
}

.material-card-title {
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-card-meta {
    display: flex;
    justify-content: space-between;
    font-size: 12px;
    color: var(--text-light);
}

.material-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 5px;
    margin-top: 10px;
}

.tag {
    display: inline-block;
    padding: 2px 8px;
    font-size: 11px;
    border-radius: 10px;
    background: #f0f0f0;
    color: var(--text-light);
}

/* 分类筛选器 */
.filter-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    padding: 20px;
    background: var(--card-bg);
    border-radius: var(--radius);
    margin-bottom: 30px;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.filter-label {
    font-size: 14px;
    color: var(--text-light);
}

.filter-select {
    padding: 8px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    outline: none;
    background: white;
    cursor: pointer;
}

.filter-select:focus {
    border-color: var(--accent-color);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    margin-top: 40px;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 36px;
    height: 36px;
    padding: 0 12px;
    font-size: 14px;
    border-radius: var(--radius);
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-color);
}

.pagination a:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.pagination .current {
    background: var(--accent-color);
    border-color: var(--accent-color);
    color: white;
}

/* 页脚 */
.footer {
    margin-top: 60px;
    padding: 30px 0;
    background: var(--card-bg);
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 28px;
    }

    .materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }

    .filter-bar {
        flex-direction: column;
    }
}

/* 详情页样式 */
.detail-page {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: 40px;
    padding: 40px 0;
}

.detail-image {
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
}

.detail-image img {
    width: 100%;
    height: auto;
}

.detail-info {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    height: fit-content;
    position: sticky;
    top: 80px;
}

.detail-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
}

.detail-meta {
    margin-bottom: 20px;
}

.detail-meta-item {
    display: flex;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.detail-meta-item:last-child {
    border-bottom: none;
}

.detail-meta-label {
    width: 100px;
    color: var(--text-light);
}

.detail-meta-value {
    flex: 1;
    color: var(--text-color);
}

.detail-download {
    margin-top: 30px;
}

.detail-download .btn {
    width: 100%;
    padding: 15px;
    font-size: 16px;
}

.detail-tags {
    margin-top: 20px;
}

.detail-category {
    margin-bottom: 20px;
}

@media (max-width: 768px) {
    .detail-page {
        grid-template-columns: 1fr;
    }
}

/* 后台管理样式 */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: 240px;
    background: #1a1a2e;
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.admin-sidebar-header {
    padding: 20px;
    font-size: 18px;
    font-weight: 600;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.admin-sidebar-menu {
    padding: 20px 0;
}

.admin-menu-item {
    display: block;
    padding: 12px 20px;
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.admin-menu-item:hover,
.admin-menu-item.active {
    background: rgba(255, 255, 255, 0.1);
    color: white;
}

.admin-main {
    flex: 1;
    margin-left: 240px;
    background: var(--bg-color);
}

.admin-header {
    background: var(--card-bg);
    padding: 15px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
}

.admin-content {
    padding: 30px;
}

.admin-page-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 30px;
}

/* 表格样式 */
.data-table {
    width: 100%;
    background: var(--card-bg);
    border-radius: var(--radius);
    overflow: hidden;
}

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

.data-table th {
    background: #f8f9fa;
    font-weight: 600;
    font-size: 14px;
}

.data-table tr:hover {
    background: #f8f9fa;
}

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

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

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

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 10px 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
    outline: none;
    transition: var(--transition);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    border-color: var(--accent-color);
}

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

/* 上传区域 */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: var(--radius);
    padding: 40px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
}

.upload-area:hover {
    border-color: var(--accent-color);
    background: rgba(0, 102, 255, 0.05);
}

.upload-area-icon {
    font-size: 48px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.upload-area-text {
    color: var(--text-light);
}

/* 分类树 */
.category-tree {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 20px;
}

.category-tree-item {
    padding: 10px;
    border-bottom: 1px solid var(--border-color);
}

.category-tree-item:last-child {
    border-bottom: none;
}

.category-tree-level-1 {
    font-weight: 600;
    padding-left: 0;
}

.category-tree-level-2 {
    padding-left: 20px;
    color: var(--text-light);
}

.category-tree-level-3 {
    padding-left: 40px;
    font-size: 13px;
    color: var(--text-light);
}

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

.toolbar-left {
    display: flex;
    gap: 10px;
}

.toolbar-right {
    display: flex;
    gap: 10px;
}

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

.empty-state-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.empty-state-text {
    font-size: 16px;
}

/* 消息提示 */
.alert {
    padding: 15px 20px;
    border-radius: var(--radius);
    margin-bottom: 20px;
}

.alert-success {
    background: rgba(39, 174, 96, 0.1);
    border: 1px solid var(--success-color);
    color: var(--success-color);
}

.alert-error {
    background: rgba(231, 76, 60, 0.1);
    border: 1px solid var(--danger-color);
    color: var(--danger-color);
}

.alert-warning {
    background: rgba(243, 156, 18, 0.1);
    border: 1px solid var(--warning-color);
    color: var(--warning-color);
}

/* 复选框组 */
.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 5px;
    padding: 5px 12px;
    background: var(--bg-color);
    border-radius: 15px;
    cursor: pointer;
    transition: var(--transition);
}

.checkbox-item:hover {
    background: #e5e5e5;
}

.checkbox-item input {
    cursor: pointer;
}

/* 图片预览 */
.preview-images {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 10px;
    margin-top: 20px;
}

.preview-image {
    position: relative;
    aspect-ratio: 1;
    border-radius: var(--radius);
    overflow: hidden;
}

.preview-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-image-remove {
    position: absolute;
    top: 5px;
    right: 5px;
    width: 20px;
    height: 20px;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
}