/* bskk 知识库 - iOS风格样式 */

:root {
    --primary-color: #007AFF;
    --secondary-color: #5856D6;
    --success-color: #34C759;
    --warning-color: #FF9500;
    --danger-color: #FF3B30;
    --text-primary: #1C1C1E;
    --text-secondary: #8E8E93;
    --bg-primary: #FFFFFF;
    --bg-secondary: #F2F2F7;
    --border-color: #E5E5EA;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --radius: 12px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Helvetica Neue", Arial, sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 12px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 20px;
    font-weight: 600;
    color: var(--primary-color);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 15px;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary-color);
}

/* 主内容区 */
.main-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 24px 20px;
    min-height: calc(100vh - 200px);
}

/* 英雄区 */
.hero {
    text-align: center;
    padding: 60px 20px;
    background: var(--bg-primary);
    border-radius: var(--radius);
    margin-bottom: 32px;
    box-shadow: var(--shadow);
}

.hero h1 {
    font-size: 36px;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.hero p {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

/* 搜索框 */
.search-box {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    gap: 12px;
}

.search-box input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 16px;
    outline: none;
    transition: border-color 0.2s;
}

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

.search-box button {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    cursor: pointer;
    transition: opacity 0.2s;
}

.search-box button:hover {
    opacity: 0.9;
}

/* 分区 */
.section {
    margin-bottom: 40px;
}

.section h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.section-footer {
    margin-top: 16px;
    text-align: center;
}

/* 分类网格 */
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    gap: 16px;
}

.category-card {
    background: var(--bg-primary);
    padding: 24px 16px;
    border-radius: var(--radius);
    text-align: center;
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--shadow);
    transition: transform 0.2s, box-shadow 0.2s;
}

.category-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.category-icon {
    font-size: 40px;
    margin-bottom: 12px;
}

.category-name {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.category-count {
    font-size: 14px;
    color: var(--text-secondary);
}

/* 文章列表 */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.article-item {
    background: var(--bg-primary);
    padding: 16px 20px;
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--text-primary);
    box-shadow: var(--shadow);
    transition: box-shadow 0.2s;
    display: block;
}

.article-item:hover {
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.article-title {
    font-size: 17px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.article-title a {
    color: var(--text-primary);
    text-decoration: none;
}

.article-title a:hover {
    color: var(--primary-color);
}

.article-meta {
    display: flex;
    gap: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.article-category {
    background: var(--bg-secondary);
    padding: 2px 8px;
    border-radius: 6px;
}

.article-status {
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 12px;
}

.article-status.published {
    background: #E8F5E9;
    color: var(--success-color);
}

.article-status.draft {
    background: #FFF3E0;
    color: var(--warning-color);
}

/* 文章详情 */
.article-detail {
    background: var(--bg-primary);
    border-radius: var(--radius);
    padding: 32px;
    box-shadow: var(--shadow);
}

.article-header {
    margin-bottom: 24px;
    padding-bottom: 24px;
    border-bottom: 1px solid var(--border-color);
}

.article-header h1 {
    font-size: 28px;
    margin-bottom: 12px;
}

.article-body {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 32px;
}

.article-body p {
    margin-bottom: 16px;
}

.article-body h2 {
    font-size: 22px;
    margin: 24px 0 12px;
}

.article-body ul, .article-body ol {
    margin: 16px 0;
    padding-left: 24px;
}

.article-body li {
    margin-bottom: 8px;
}

.article-attachments {
    background: var(--bg-secondary);
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.article-attachments h3 {
    font-size: 16px;
    margin-bottom: 12px;
}

.article-attachments ul {
    list-style: none;
}

.article-attachments li {
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.article-attachments li:last-child {
    border-bottom: none;
}

.article-attachments a {
    color: var(--primary-color);
    text-decoration: none;
}

.article-attachments a:hover {
    text-decoration: underline;
}

.file-size {
    color: var(--text-secondary);
    font-size: 14px;
}

.article-footer {
    padding-top: 24px;
    border-top: 1px solid var(--border-color);
}

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

.page-header h1 {
    font-size: 28px;
}

.back-link {
    color: var(--primary-color);
    text-decoration: none;
    font-size: 15px;
}

.back-link:hover {
    text-decoration: underline;
}

/* 认证页面 */
.auth-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-card {
    background: var(--bg-primary);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
}

.auth-card h2 {
    text-align: center;
    margin-bottom: 32px;
}

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

.auth-form label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.auth-form input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 16px;
    outline: none;
}

.auth-form input:focus {
    border-color: var(--primary-color);
}

/* 管理页面 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

.stat-card {
    background: var(--bg-primary);
    padding: 24px;
    border-radius: var(--radius);
    text-align: center;
    box-shadow: var(--shadow);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* 筛选栏 */
.filter-bar {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.filter-item {
    padding: 8px 16px;
    background: var(--bg-primary);
    border-radius: 20px;
    text-decoration: none;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s;
}

.filter-item:hover {
    background: var(--bg-secondary);
}

.filter-item.active {
    background: var(--primary-color);
    color: white;
}

.filter-separator {
    color: var(--border-color);
    padding: 8px 0;
}

/* 管理端文章项 */
.admin-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.article-info {
    flex: 1;
}

.article-actions {
    display: flex;
    gap: 8px;
}

/* 表单 */
.article-form {
    background: var(--bg-primary);
    padding: 32px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    font-size: 15px;
}

.form-group input[type="text"],
.form-group input[type="password"],
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 16px;
    outline: none;
    font-family: inherit;
}

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

.form-group textarea {
    resize: vertical;
    min-height: 300px;
}

.form-hint {
    display: block;
    margin-top: 6px;
    color: var(--text-secondary);
    font-size: 13px;
}

.attachment-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.attachment-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: var(--bg-secondary);
    border-radius: 8px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
}

/* 搜索页 */
.search-page {
    max-width: 800px;
    margin: 0 auto;
}

.search-form {
    margin-bottom: 32px;
}

.search-input-group {
    display: flex;
    gap: 12px;
}

.search-input-group input {
    flex: 1;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 16px;
    outline: none;
}

.search-input-group select {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 16px;
    outline: none;
    background: white;
}

.search-input-group input:focus,
.search-input-group select:focus {
    border-color: var(--primary-color);
}

.search-input-group button {
    padding: 12px 24px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius);
    font-size: 16px;
    cursor: pointer;
}

.results-count {
    color: var(--text-secondary);
    margin-bottom: 16px;
}

/* 按钮 */
.btn {
    padding: 10px 20px;
    border: none;
    border-radius: 8px;
    font-size: 15px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.2s;
    text-align: center;
}

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

.btn-primary:hover {
    opacity: 0.9;
}

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

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

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

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

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

.btn-small {
    padding: 6px 12px;
    font-size: 13px;
}

/* 提示框 */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
}

.alert-success {
    background: #E8F5E9;
    color: #2E7D32;
}

.alert-error {
    background: #FFEBEE;
    color: #C62828;
}

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

.empty-state p {
    margin-bottom: 20px;
}

/* 页脚 */
.footer {
    background: var(--bg-primary);
    border-top: 1px solid var(--border-color);
    padding: 24px 20px;
    margin-top: 40px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    text-align: center;
    color: var(--text-secondary);
    font-size: 14px;
}

.footer-links {
    margin-top: 8px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--primary-color);
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 12px;
    }
    
    .nav-links {
        gap: 16px;
    }
    
    .hero h1 {
        font-size: 28px;
    }
    
    .category-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }
    
    .search-box {
        flex-direction: column;
    }
    
    .search-input-group {
        flex-direction: column;
    }
    
    .article-detail {
        padding: 20px;
    }
    
    .admin-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }
    
    .article-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

/* 工具类 */
.text-muted {
    color: var(--text-secondary);
}

.link {
    color: var(--primary-color);
    text-decoration: none;
}

.link:hover {
    text-decoration: underline;
}