/* ============================================
   基础样式 - 参考苹果和少数派风格
   ============================================ */

:root {
    --color-primary: #007AFF;
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-border: #d2d2d7;
    --color-accent: #007AFF;
    
    --font-family: -apple-system, BlinkMacSystemFont, "Noto Sans SC", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    --font-size-base: 15px;
    --font-size-small: 13px;
    --font-size-large: 15px;
    --font-size-h1: 36px;
    --font-size-h2: 26px;
    --font-size-h3: 20px;
    
    --spacing-xs: 6px;
    --spacing-sm: 12px;
    --spacing-md: 18px;
    --spacing-lg: 36px;
    --spacing-xl: 60px;
    
    --max-width: 1200px;
    --content-width: 720px;
    --border-radius: 8px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    font-size: var(--font-size-base);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--color-text);
    line-height: 1.7;
    background-color: var(--color-bg);
    overflow-x: hidden;
}

/* ============================================
   容器和布局
   ============================================ */

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.main-content {
    min-height: calc(100vh - 200px);
}

/* ============================================
   头部导航
   ============================================ */

.site-header {
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-sm) 0;
    gap: var(--spacing-md);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.header-right .nav-link {
    display: block !important;
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-small);
    font-weight: 400;
    padding: var(--spacing-xs) 0;
    transition: var(--transition);
}

.header-right .nav-link:hover {
    color: var(--color-primary);
}

.site-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
    letter-spacing: 0.5px;
    position: relative;
    display: flex;
    align-items: center;
    gap: 10px;
}

.site-logo {
    width: 28px;
    height: 28px;
    border-radius: 6px;
    object-fit: contain;
    transition: var(--transition);
    flex-shrink: 0;
    background: transparent;
    padding: 2px;
    box-sizing: border-box;
    display: block;
    filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.05));
}

.site-title:hover .site-logo {
    transform: scale(1.08) rotate(2deg);
    filter: drop-shadow(0 2px 4px rgba(0, 122, 255, 0.2)) brightness(1.05);
}

.site-title-text {
    position: relative;
}

.site-title::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

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

.site-title:hover::after {
    width: 100%;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
    align-items: center;
}

.nav-link {
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-small);
    font-weight: 400;
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: var(--transition);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-primary);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-primary);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0.1);
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    min-width: 44px;
    min-height: 44px;
    z-index: 1001;
    position: relative;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
}

/* ============================================
   首页样式
   ============================================ */

.hero {
    padding: var(--spacing-xl) 0 calc(var(--spacing-xl) + 20px);
    text-align: center;
    background: var(--color-bg);
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 1px;
    background: var(--color-border);
}

.hero-title {
    font-size: 42px;
    font-weight: 300;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 2px;
    line-height: 1.2;
    font-family: var(--font-family);
}

.hero-description {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    max-width: 500px;
    margin: 0 auto var(--spacing-md) auto;
    font-weight: 300;
    letter-spacing: 0.3px;
    line-height: 1.6;
}

/* 开发实验室（首页预览） */

.labs-section {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: var(--color-bg-secondary);
}

.labs-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: var(--spacing-md);
}

.lab-card {
    background: #fff;
    border-radius: var(--border-radius);
    border: 1px solid rgba(0, 0, 0, 0.03);
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.03);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: var(--transition);
}

.lab-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
}

.lab-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.lab-card-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
}

.lab-card-status {
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 999px;
    background: rgba(0, 122, 255, 0.06);
    color: #007AFF;
    border: 1px solid rgba(0, 122, 255, 0.15);
}

.lab-card-description {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.lab-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.lab-tag {
    font-size: 11px;
    padding: 2px 6px;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.03);
    color: var(--color-text-secondary);
}

.lab-card-footer {
    margin-top: var(--spacing-sm);
}

.lab-card-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 6px 14px;
    border-radius: 999px;
    background: #007AFF;
    color: #fff;
    text-decoration: none;
    font-size: var(--font-size-small);
    transition: var(--transition);
}

.lab-card-button:hover {
    background: #0060d1;
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.35);
}

.hero-social {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    margin-top: var(--spacing-md);
    flex-wrap: wrap;
}

.social-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
}

.social-icon:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
    transform: translateY(-3px) scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.25);
    color: white;
}

.social-icon svg {
    width: 20px;
    height: 20px;
    transition: var(--transition);
}

.social-icon:hover svg {
    transform: scale(1.1);
}

/* ============================================
   分类展示区块（参考少数派风格）
   ============================================ */

.categories-section {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
}

.category-block {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
}

.category-block:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.1);
    transform: translateY(-2px);
}

.category-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-xs);
}

.category-icon {
    font-size: 24px;
}

.category-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
    flex: 1;
}

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

/* 开发实验室列表页 */

.labs-page .labs-hero {
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    background: var(--color-bg);
}

.labs-page .page-title {
    font-size: 28px;
    margin-bottom: var(--spacing-xs);
}

.labs-page .page-description {
    max-width: 520px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

.labs-list-section {
    padding: 0 0 var(--spacing-xl);
}

.labs-page .labs-grid {
    margin-top: var(--spacing-md);
}

.labs-empty {
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
}

.category-description {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.6;
}

.category-posts {
    margin-bottom: var(--spacing-sm);
}

.category-post-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xs) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.category-post-date {
    font-size: 12px;
    color: var(--color-text-secondary);
    min-width: 50px;
    font-family: 'SF Mono', Monaco, monospace;
}

.category-post-link {
    flex: 1;
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-small);
    transition: var(--transition);
    line-height: 1.5;
}

.category-post-link:hover {
    color: var(--color-primary);
}

.category-more {
    display: inline-block;
    font-size: var(--font-size-small);
    color: var(--color-primary);
    text-decoration: none;
    margin-top: var(--spacing-sm);
    transition: var(--transition);
}

.category-more:hover {
    transform: translateX(4px);
}

.posts-section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: var(--font-size-h2);
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.section-more {
    font-size: var(--font-size-base);
    color: var(--color-primary);
    text-decoration: none;
    transition: var(--transition);
}

.section-more:hover {
    transform: translateX(4px);
}

.posts-list {
    display: grid;
    gap: var(--spacing-md);
}

.post-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    cursor: pointer;
}

.post-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.1);
    transform: translateY(-2px);
}

.post-card-title {
    font-size: var(--font-size-h3);
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.4;
}

.post-card-title a {
    color: var(--color-text);
    text-decoration: none;
    transition: var(--transition);
}

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

.post-card-excerpt {
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    line-height: 1.7;
    margin-bottom: var(--spacing-sm);
}

.post-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.post-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.post-card-date {
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
}

.post-card-category {
    background: var(--color-primary);
    color: white;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.post-card-footer {
    margin-top: var(--spacing-sm);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.post-card-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.post-tag {
    color: var(--color-text-secondary);
    font-size: 12px;
    text-decoration: none;
    transition: var(--transition);
}

.post-tag:hover {
    color: var(--color-primary);
}

.post-tag-more {
    color: var(--color-text-secondary);
    font-size: 12px;
    opacity: 0.7;
}

.more-posts {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--color-primary);
    color: white;
    text-decoration: none;
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: var(--transition);
    border: none;
    cursor: pointer;
}

.btn:hover {
    background: #0051D5;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.3);
}

/* ============================================
   文章页面样式
   ============================================ */

.post {
    max-width: var(--content-width);
    margin: 0 auto;
    padding: var(--spacing-lg) var(--spacing-md);
}

.post-header {
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}

.post-title {
    font-size: var(--font-size-h1);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    line-height: 1.3;
    letter-spacing: -0.02em;
}

.post-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    flex-wrap: wrap;
}

.post-date {
    color: var(--color-text-secondary);
}

.post-categories {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
}

.category-tag {
    background: var(--color-bg-secondary);
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    color: var(--color-text);
}

.post-content {
    font-size: var(--font-size-large);
    line-height: 1.7;
    color: var(--color-text);
}

.post-content h2 {
    font-size: var(--font-size-h2);
    font-weight: 600;
    margin: var(--spacing-md) 0 var(--spacing-sm);
    color: var(--color-text);
    letter-spacing: -0.01em;
    line-height: 1.4;
}

.post-content h3 {
    font-size: var(--font-size-h3);
    font-weight: 600;
    margin: var(--spacing-md) 0 var(--spacing-xs);
    color: var(--color-text);
    line-height: 1.4;
}

.post-content p {
    margin-bottom: var(--spacing-sm);
}

.post-content a {
    color: var(--color-primary);
    text-decoration: none;
    border-bottom: 1px solid transparent;
    transition: var(--transition);
}

.post-content a:hover {
    border-bottom-color: var(--color-primary);
}

.post-content code {
    background: var(--color-bg-secondary);
    padding: 2px 5px;
    border-radius: 4px;
    font-size: 0.87em;
    font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, monospace;
    line-height: 1.5;
}

.post-content pre {
    background: var(--color-bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--spacing-sm) 0;
    font-size: 13px;
    line-height: 1.6;
}

.post-content pre code {
    background: none;
    padding: 0;
}

.post-content blockquote {
    border-left: 4px solid var(--color-primary);
    padding-left: var(--spacing-sm);
    margin: var(--spacing-sm) 0;
    color: var(--color-text-secondary);
    font-style: italic;
    font-size: 14px;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: var(--spacing-sm) 0;
}

.post-content ul,
.post-content ol {
    margin: var(--spacing-sm) 0;
    padding-left: var(--spacing-md);
}

.post-content li {
    margin-bottom: 6px;
    line-height: 1.7;
}

.post-footer {
    margin-top: var(--spacing-lg);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--color-border);
}

.post-tags {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-small);
}

.tags-label {
    color: var(--color-text-secondary);
}

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

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

.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.nav-link {
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
}

.nav-link:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-secondary);
}

.nav-label {
    display: block;
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.nav-title {
    display: block;
    color: var(--color-text);
    font-weight: 500;
}

.nav-next {
    text-align: right;
}

/* ============================================
   页脚
   ============================================ */

.site-footer {
    background: var(--color-bg-secondary);
    padding: var(--spacing-lg) 0;
    margin-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.footer-info p {
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
}

.footer-description {
    color: var(--color-text-secondary);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-small);
    transition: var(--transition);
}

.social-link:hover {
    color: var(--color-primary);
}

.footer-wechat {
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--color-border);
    text-align: center;
}

.wechat-invite {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-md);
    background: linear-gradient(135deg, rgba(7, 193, 96, 0.05) 0%, rgba(7, 193, 96, 0.02) 100%);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.wechat-invite:hover {
    background: linear-gradient(135deg, rgba(7, 193, 96, 0.08) 0%, rgba(7, 193, 96, 0.04) 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(7, 193, 96, 0.1);
}

.wechat-icon-wrapper {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(7, 193, 96, 0.1);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.wechat-content {
    flex: 1;
}

.wechat-title {
    font-size: 18px;
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.wechat-description {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

.wechat-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: #07C160;
    color: white;
    text-decoration: none;
    border-radius: 20px;
    font-size: var(--font-size-small);
    font-weight: 500;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 8px rgba(7, 193, 96, 0.2);
    -webkit-tap-highlight-color: rgba(7, 193, 96, 0.3);
    touch-action: manipulation;
    user-select: none;
    -webkit-user-select: none;
    min-height: 44px;
    min-width: 120px;
    position: relative;
    z-index: 1;
}

.wechat-button:hover {
    background: #06AD56;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(7, 193, 96, 0.3);
}

.wechat-button:active {
    transform: translateY(0);
}

.wechat-button svg {
    transition: var(--transition);
}

.wechat-button:hover svg {
    transform: translateX(3px);
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.footer-bottom a {
    color: var(--color-primary);
    text-decoration: none;
}

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 768px) {
    :root {
        --font-size-h1: 28px;
        --font-size-h2: 22px;
        --font-size-h3: 18px;
        --spacing-xl: 36px;
        --spacing-lg: 24px;
    }
    
    .hero-title {
        font-size: 32px;
        letter-spacing: 1px;
    }
    
    .hero-description {
        font-size: var(--font-size-small);
    }
    
    .hero-social {
        gap: var(--spacing-sm);
    }
    
    .social-icon {
        width: 36px;
        height: 36px;
    }
    
    .social-icon svg {
        width: 18px;
        height: 18px;
    }
    
    .site-logo {
        width: 24px;
        height: 24px;
    }
    
    .site-title {
        font-size: 16px;
    }
    
    .nav-list {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--color-bg);
        flex-direction: column;
        padding: var(--spacing-md);
        border-bottom: 1px solid var(--color-border);
        box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }
    
    .nav-list.active {
        display: flex;
    }
    
    .nav-link {
        padding: var(--spacing-sm) var(--spacing-md);
        -webkit-tap-highlight-color: rgba(0, 122, 255, 0.1);
        touch-action: manipulation;
        min-height: 44px;
        display: flex;
        align-items: center;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero {
        padding: var(--spacing-lg) 0;
    }
    
    .post {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .post-navigation {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .wechat-invite {
        flex-direction: column;
        text-align: center;
        padding: var(--spacing-sm);
    }
    
    .wechat-icon-wrapper {
        margin: 0 auto var(--spacing-sm);
        width: 56px;
        height: 56px;
    }
    
    .wechat-title {
        font-size: 16px;
    }
    
    .wechat-description {
        font-size: 12px;
        margin-bottom: var(--spacing-md);
    }
    
    .wechat-button {
        min-height: 48px;
        padding: var(--spacing-md) var(--spacing-lg);
        font-size: 14px;
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
    
    .categories-grid {
        grid-template-columns: 1fr;
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }
    
    .posts-list {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
    
    .post-content {
        font-size: 14px;
        line-height: 1.65;
    }
    
    .post-title {
        font-size: 24px;
    }
}

/* ============================================
   登录页面样式
   ============================================ */

.login-page {
    min-height: calc(100vh - 200px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
}

.login-container {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 100%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
}

.login-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.login-title {
    font-size: 28px;
    font-weight: 300;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 1px;
}

.login-subtitle {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.login-content {
    margin-bottom: var(--spacing-md);
}

.login-btn {
    width: 100%;
    padding: 12px 24px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    background: var(--color-bg);
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.login-btn:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-secondary);
    transform: translateY(-1px);
}

.github-btn {
    background: #24292e;
    color: white;
    border-color: #24292e;
}

.github-btn:hover {
    background: #2f363d;
    border-color: #2f363d;
}

.github-icon {
    width: 20px;
    height: 20px;
}

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

.primary-btn:hover {
    background: #0051D5;
    border-color: #0051D5;
}

.login-divider {
    text-align: center;
    margin: var(--spacing-md) 0;
    position: relative;
}

.login-divider::before,
.login-divider::after {
    content: '';
    position: absolute;
    top: 50%;
    width: 45%;
    height: 1px;
    background: var(--color-border);
}

.login-divider::before {
    left: 0;
}

.login-divider::after {
    right: 0;
}

.login-divider span {
    background: var(--color-bg);
    padding: 0 var(--spacing-sm);
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
    position: relative;
    z-index: 1;
}

.login-form {
    margin-top: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    font-size: var(--font-size-small);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: var(--transition);
    background: var(--color-bg);
    color: var(--color-text);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.login-error {
    background: #fee;
    color: #c33;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    font-size: var(--font-size-small);
    margin-top: var(--spacing-md);
    border: 1px solid #fcc;
}

.login-footer {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.login-note {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

/* ============================================
   用户菜单样式
   ============================================ */

.user-menu {
    display: none;
    position: relative;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--color-border);
    display: none;
}

.user-name {
    font-size: var(--font-size-small);
    color: var(--color-text);
    font-weight: 500;
}

.user-dropdown {
    position: relative;
}

.user-dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-xs);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    min-width: 150px;
    z-index: 1000;
}

.user-dropdown:hover .user-dropdown-menu {
    display: block;
}

.user-dropdown-item {
    display: block;
    padding: var(--spacing-sm) var(--spacing-md);
    color: var(--color-text);
    text-decoration: none;
    font-size: var(--font-size-small);
    transition: var(--transition);
}

.user-dropdown-item:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
}

#logoutBtn {
    background: none;
    border: none;
    color: var(--color-text);
    cursor: pointer;
    font-size: var(--font-size-small);
    padding: var(--spacing-sm) var(--spacing-md);
    width: 100%;
    text-align: left;
    font-family: var(--font-family);
}

#logoutBtn:hover {
    background: var(--color-bg-secondary);
    color: #c33;
}

#adminPanelLink {
    display: none;
}

/* ============================================
   管理员面板样式（参考少数派风格）
   ============================================ */

.admin-panel {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
    min-height: calc(100vh - 200px);
}

.admin-header {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.admin-header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-md);
}

.admin-title {
    font-size: 28px;
    font-weight: 300;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.5px;
}

.admin-subtitle {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
}

.admin-header-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    border: none;
}

.btn-primary:hover {
    background: #0051D5;
}

.admin-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    background: var(--color-bg);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.admin-tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    border-radius: calc(var(--border-radius) - 2px);
    transition: var(--transition);
}

.admin-tab:hover {
    color: var(--color-text);
    background: var(--color-bg-secondary);
}

.admin-tab.active {
    background: var(--color-primary);
    color: white;
}

.admin-tab-content {
    display: none;
}

.admin-tab-content.active {
    display: block;
}

.admin-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.stat-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.stat-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 4px 20px rgba(0, 122, 255, 0.1);
    transform: translateY(-2px);
}

.stat-icon {
    font-size: 32px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
}

.stat-content {
    flex: 1;
}

.stat-value {
    font-size: 28px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    line-height: 1;
}

.stat-label {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.admin-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.admin-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
}

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

.admin-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0;
}

.admin-filters {
    display: flex;
    gap: var(--spacing-sm);
}

.filter-select,
.filter-search {
    padding: 8px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-small);
    font-family: var(--font-family);
}

.filter-search {
    min-width: 200px;
}

.admin-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.admin-list-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.admin-list-item:hover {
    background: var(--color-bg-secondary);
}

.list-item-content {
    flex: 1;
}

.list-item-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.list-item-meta {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.list-item-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.btn-icon {
    background: none;
    border: none;
    font-size: 16px;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

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

.admin-info-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid var(--color-border);
}

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

.info-label {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.info-value {
    font-size: var(--font-size-base);
    color: var(--color-text);
    font-weight: 500;
}

.admin-section {
    margin-bottom: var(--spacing-xl);
}

.admin-section-title {
    font-size: var(--font-size-h2);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-bg);
    border-radius: var(--border-radius);
    overflow: hidden;
}

.admin-table th,
.admin-table td {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.admin-table th {
    background: var(--color-bg-secondary);
    font-weight: 600;
    font-size: var(--font-size-small);
    color: var(--color-text);
}

.admin-table tr:last-child td {
    border-bottom: none;
}

.admin-table tr:hover {
    background: var(--color-bg-secondary);
}

.badge {
    display: inline-block;
    padding: 4px 10px;
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.status-badge.published {
    background: #e8f5e9;
    color: #2e7d32;
}

.role-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.role-badge.admin {
    background: var(--color-primary);
    color: white;
}

.role-badge.user {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.user-cell {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-avatar-small {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
}

.btn-link {
    background: none;
    border: none;
    color: var(--color-primary);
    text-decoration: none;
    font-size: var(--font-size-small);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
}

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

.text-danger {
    color: #c33;
}

.form-input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: var(--transition);
    background: var(--color-bg);
    color: var(--color-text);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.settings-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* ============================================
   用户中心样式
   ============================================ */

.profile-page {
    padding: var(--spacing-xl) 0;
    background: var(--color-bg-secondary);
    min-height: calc(100vh - 200px);
}

.profile-header {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.profile-avatar {
    flex-shrink: 0;
}

.avatar-circle {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    font-weight: 600;
}

.profile-info {
    flex: 1;
}

.profile-name {
    font-size: 24px;
    font-weight: 300;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    letter-spacing: 0.5px;
}

.profile-role {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xs);
}

.profile-email {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.profile-tabs {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    background: var(--color-bg);
    padding: var(--spacing-xs);
    border-radius: var(--border-radius);
    border: 1px solid var(--color-border);
}

.profile-tab {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    border-radius: calc(var(--border-radius) - 2px);
    transition: var(--transition);
}

.profile-tab:hover {
    color: var(--color-text);
    background: var(--color-bg-secondary);
}

.profile-tab.active {
    background: var(--color-primary);
    color: white;
}

.profile-tab-content {
    display: none;
}

.profile-tab-content.active {
    display: block;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.profile-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.profile-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border);
}

.profile-card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0;
}

.activity-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.activity-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.activity-icon {
    font-size: 24px;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-secondary);
    border-radius: var(--border-radius);
    flex-shrink: 0;
}

.activity-content {
    flex: 1;
}

.activity-text {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

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

.activity-time {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.posts-list,
.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.post-item,
.comment-item {
    padding: var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.post-item:hover,
.comment-item:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-secondary);
}

.post-item-title {
    font-size: var(--font-size-base);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.post-item-title a {
    color: var(--color-text);
    text-decoration: none;
}

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

.post-item-meta,
.comment-meta {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.comment-text {
    font-size: var(--font-size-base);
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
    line-height: 1.6;
}

.comment-meta a {
    color: var(--color-primary);
    text-decoration: none;
}

/* ============================================
   评论系统样式
   ============================================ */

.back-link {
    display: inline-block;
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-small);
    margin-bottom: var(--spacing-md);
    transition: var(--transition);
}

.back-link:hover {
    color: var(--color-primary);
}

.comment-form-container {
    background: var(--color-bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-lg);
    border: 1px solid var(--color-border);
}

.comment-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.comment-form .form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.comment-form .form-label {
    font-size: var(--font-size-small);
    font-weight: 500;
    color: var(--color-text);
}

.comment-form .form-input {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    font-size: var(--font-size-base);
    font-family: inherit;
    background: var(--color-bg);
    color: var(--color-text);
    transition: var(--transition);
}

.comment-form .form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

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

.comment-form-actions {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-sm);
}

.comment-tip {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.comment-tip a {
    color: var(--color-primary);
    text-decoration: none;
}

.comments-list-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.comment-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.comment-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(0, 122, 255, 0.1);
}

.comment-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 16px;
    flex-shrink: 0;
}

.comment-content {
    flex: 1;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

.comment-author {
    font-weight: 600;
    color: var(--color-text);
    font-size: var(--font-size-base);
}

.comment-time {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
}

.comment-body {
    margin-bottom: var(--spacing-sm);
}

.comment-body p {
    margin: 0;
    color: var(--color-text);
    line-height: 1.6;
    font-size: var(--font-size-base);
}

.comment-actions {
    display: flex;
    gap: var(--spacing-md);
}

.comment-action-btn {
    background: none;
    border: none;
    color: var(--color-text-secondary);
    font-size: var(--font-size-small);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 4px;
}

.comment-action-btn:hover {
    background: var(--color-bg-secondary);
    color: var(--color-primary);
}

@media (max-width: 768px) {
    .login-container {
        padding: var(--spacing-md);
    }
    
    .admin-stats {
        grid-template-columns: 1fr;
    }
    
    .admin-table {
        font-size: var(--font-size-small);
    }
    
    .admin-table th,
    .admin-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* ============================================
   评论区域样式
   ============================================ */

.comments-section {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.comments-title {
    font-size: var(--font-size-h2);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.comment-count {
    font-size: var(--font-size-base);
    font-weight: 400;
    color: var(--color-text-secondary);
}

.comments-empty {
    text-align: center;
    padding: 40px 20px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

.comments-loading {
    text-align: center;
    padding: 20px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
}

/* Utterances 评论样式优化 */
.comments-section .utterances {
    max-width: 100%;
}

/* Gitalk 评论样式优化 */
#gitalk-container {
    margin-top: var(--spacing-md);
}

/* ============================================
   书单样式 - 简约科技风格（类似比尔盖茨推荐）
   ============================================ */

.book-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.book-item {
    display: flex;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
    align-items: flex-start;
}

.book-item:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(0, 122, 255, 0.08);
    transform: translateY(-2px);
}

.book-cover {
    flex-shrink: 0;
    width: 160px;
    height: 240px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    background: var(--color-bg-secondary);
    transition: var(--transition);
}

.book-item:hover .book-cover {
    box-shadow: 0 8px 20px rgba(0, 122, 255, 0.15);
    transform: scale(1.02);
}

.book-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.book-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.book-title {
    font-size: var(--font-size-h3);
    font-weight: 600;
    color: var(--color-text);
    margin: 0;
    line-height: 1.3;
    letter-spacing: -0.01em;
}

.book-author {
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    margin: 0;
    font-weight: 400;
}

.book-description {
    font-size: var(--font-size-base);
    color: var(--color-text);
    line-height: 1.7;
    margin: var(--spacing-sm) 0;
    flex: 1;
}

.book-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    margin-top: var(--spacing-xs);
}

.book-category {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-bg-secondary);
    color: var(--color-text);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
    letter-spacing: 0.01em;
}

.book-rating {
    font-size: var(--font-size-small);
    color: var(--color-text-secondary);
    letter-spacing: 2px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .book-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        padding: var(--spacing-md);
    }
    
    .book-cover {
        width: 140px;
        height: 210px;
    }
    
    .book-info {
        text-align: left;
    }
    
    .book-title {
        font-size: var(--font-size-h3);
        text-align: center;
    }
    
    .book-author {
        text-align: center;
    }
    
    .book-meta {
        justify-content: center;
    }
}

@media (min-width: 769px) and (max-width: 1024px) {
    .book-cover {
        width: 140px;
        height: 210px;
    }
}