/* main.css */
/* ========================================
   ConnectBook - 全局样式
   设计：深浅搭配，层次分明
   ======================================== */

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

/* 基础 */
body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #1f2937;
    background-color: #f9fafb;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: #4f46e5;
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover {
    color: #4338ca;
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========================================
   导航栏 - 深色背景
   ======================================== */
.navbar {
    background-color: #0f172a;
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.logo {
    font-size: 22px;
    font-weight: 700;
    color: #ffffff;
    letter-spacing: -0.3px;
}

.logo:hover {
    color: #e2e8f0;
}

/* 图片 LOGO（后台"基本设置"上传后启用） */
.logo .logo-image {
    display: block;
    height: 36px;
    width: auto;
    max-width: 200px;
    object-fit: contain;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
    align-items: center;
}

.nav-menu a {
    color: #cbd5e1;
    font-weight: 500;
    padding: 8px 0;
    position: relative;
    font-size: 15px;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #ffffff;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background-color: #4f46e5;
    transition: width 0.3s ease;
}

.nav-menu a:hover::after,
.nav-menu a.active::after {
    width: 100%;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background-color: #ffffff;
    transition: 0.3s;
}

/* ========================================
   按钮
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 15px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
    text-decoration: none;
    line-height: 1.4;
}

.btn-primary {
    background-color: #0f172a;
    color: #ffffff;
}

.btn-primary:hover {
    background-color: #1e293b;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background-color: #ffffff;
    color: #0f172a;
    border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
    background-color: #f8fafc;
}

.btn-sm {
    padding: 6px 14px;
    font-size: 14px;
}

.btn-danger {
    background-color: #ef4444;
    color: white;
}

.btn-danger:hover {
    background-color: #dc2626;
    color: white;
}

/* 导航栏认证按钮 */
.nav-menu .nav-auth-btn {
    padding: 6px 16px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s ease;
}

.nav-menu .nav-auth-btn.login {
    background-color: transparent;
    color: #cbd5e1;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.nav-menu .nav-auth-btn.login:hover {
    background-color: rgba(255, 255, 255, 0.1);
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.4);
}

.nav-menu .nav-auth-btn.register {
    background-color: #3b82f6;
    color: #ffffff;
    border: 1px solid #3b82f6;
}

.nav-menu .nav-auth-btn.register:hover {
    background-color: #2563eb;
    border-color: #2563eb;
}

/* ========================================
   卡片
   ======================================== */
.card {
    background: #ffffff;
    border-radius: 12px;
    border: 1px solid #e2e8f0;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
    overflow: hidden;
}

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

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: 500;
    color: #374151;
    font-size: 14px;
}

.form-control {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 15px;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
    background-color: #ffffff;
}

.form-control:focus {
    outline: none;
    border-color: #4f46e5;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* ========================================
   警告框
   ======================================== */
.alert {
    padding: 14px 18px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-size: 14px;
}

.alert-error {
    background-color: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-success {
    background-color: #ecfdf5;
    color: #155724;
    border: 1px solid #a7f3d0;
}

/* ========================================
   分页
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 8px;
    margin-top: 24px;
}

.pagination a {
    padding: 8px 14px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    color: #374151;
    font-size: 14px;
}

.pagination a.active,
.pagination a:hover {
    background-color: #0f172a;
    color: #ffffff;
    border-color: #0f172a;
}

/* ========================================
   页脚 - 深色
   ======================================== */
.footer {
    background-color: #0f172a;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 32px 0;
    text-align: center;
    color: #94a3b8;
    margin-top: 60px;
}

.footer p {
    font-size: 14px;
}

/* ========================================
   工具类
   ======================================== */
.text-center {
    text-align: center;
}

.mb-0 {
    margin-bottom: 0;
}

.mt-1 {
    margin-top: 8px;
}

.mt-2 {
    margin-top: 16px;
}

.mb-1 {
    margin-bottom: 8px;
}

.mb-2 {
    margin-bottom: 16px;
}

/* ========================================
   响应式
   ======================================== */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 64px;
        left: 0;
        right: 0;
        background: #0f172a;
        flex-direction: column;
        padding: 16px;
        gap: 8px;
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

    .nav-menu.active {
        display: flex;
    }

    .nav-menu a {
        padding: 12px 16px;
        width: 100%;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .container {
        padding: 0 16px;
    }
}

/* ========================================
   页脚
   ======================================== */
.footer {
    background-color: #f9fafb;
    border-top: 1px solid #e5e7eb;
    padding: 32px 0;
    margin-top: 64px;
    text-align: center;
    color: #6b7280;
    font-size: 14px;
}

.footer .container p {
    margin: 0;
    line-height: 1.8;
}

.footer .beian-info {
    margin-top: 8px;
    color: #9ca3af;
}

.footer .beian-info a {
    color: #9ca3af;
    text-decoration: underline;
}

.footer .beian-info a:hover {
    color: #6b7280;
}

/* theme.css */
:root {
    /* ========================================
       现代化配色系统
       ======================================== */
    
    /* 主色调 - 深蓝紫渐变系 */
    --color-primary: #4F46E5;
    --color-primary-light: #6366F1;
    --color-primary-dark: #3730A3;
    --color-primary-soft: #EEF2FF;
    
    /* 辅助色 - 温暖珊瑚色 */
    --color-secondary: #F97316;
    --color-secondary-light: #FB923C;
    --color-secondary-dark: #EA580C;
    --color-secondary-soft: #FFF7ED;
    
    /* 中性色 */
    --color-text: #1F2937;
    --color-text-light: #4B5563;
    --color-text-muted: #9CA3AF;
    --color-text-inverse: #FFFFFF;
    
    /* 背景色 */
    --color-background: #FFFFFF;
    --color-background-alt: #F9FAFB;
    --color-background-warm: #FEF3F2;
    
    /* 边框色 */
    --color-border: #E5E7EB;
    --color-border-light: #F3F4F6;
    --color-border-focus: #4F46E5;
    
    /* 功能色 */
    --color-success: #10B981;
    --color-success-soft: #D1FAE5;
    --color-warning: #F59E0B;
    --color-warning-soft: #FEF3C7;
    --color-error: #EF4444;
    --color-error-soft: #FEE2E2;
    --color-info: #3B82F6;
    --color-info-soft: #DBEAFE;
    
    /* ========================================
       字体系统
       ======================================== */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    --font-family-mono: "SF Mono", "Fira Code", "Fira Mono", Menlo, Consolas, monospace;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-base: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    --font-size-3xl: 48px;
    
    /* ========================================
       间距系统
       ======================================== */
    --spacing-1: 4px;
    --spacing-2: 8px;
    --spacing-3: 12px;
    --spacing-4: 16px;
    --spacing-5: 20px;
    --spacing-6: 24px;
    --spacing-8: 32px;
    --spacing-10: 40px;
    --spacing-12: 48px;
    --spacing-16: 64px;
    
    /* ========================================
       圆角系统
       ======================================== */
    --border-radius-sm: 6px;
    --border-radius: 10px;
    --border-radius-lg: 16px;
    --border-radius-xl: 24px;
    --border-radius-full: 9999px;
    
    /* ========================================
       阴影系统
       ======================================== */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-inner: inset 0 2px 4px 0 rgba(0, 0, 0, 0.05);
    
    /* ========================================
       过渡系统
       ======================================== */
    --transition-fast: 150ms ease;
    --transition: 300ms ease;
    --transition-slow: 500ms ease;
    
    /* ========================================
       布局系统
       ======================================== */
    --navbar-height: 72px;
    --sidebar-width: 260px;
    --container-max: 1200px;
    --container-narrow: 800px;
    --container-wide: 1400px;
}

/* ========================================
   深色主题
   ======================================== */
[data-theme="dark"] {
    --color-primary: #6366F1;
    --color-primary-light: #818CF8;
    --color-primary-dark: #4F46E5;
    --color-primary-soft: #1E1B4B;
    
    --color-secondary: #FB923C;
    --color-secondary-light: #FDBA74;
    --color-secondary-dark: #F97316;
    --color-secondary-soft: #431407;
    
    --color-text: #F3F4F6;
    --color-text-light: #D1D5DB;
    --color-text-muted: #9CA3AF;
    --color-text-inverse: #1F2937;
    
    --color-background: #0F172A;
    --color-background-alt: #1E293B;
    --color-background-warm: #2A1A15;
    
    --color-border: #374151;
    --color-border-light: #1F2937;
    --color-border-focus: #6366F1;
    
    --color-success: #34D399;
    --color-success-soft: #064E3B;
    --color-warning: #FBBF24;
    --color-warning-soft: #78350F;
    --color-error: #F87171;
    --color-error-soft: #7F1D1D;
    --color-info: #60A5FA;
    --color-info-soft: #1E3A8A;
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5);
}

/* ========================================
   全局微调
   ======================================== */
::selection {
    background-color: var(--color-primary-soft);
    color: var(--color-primary);
}

:focus-visible {
    outline: 2px solid var(--color-border-focus);
    outline-offset: 2px;
}

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

hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-6) 0;
}

/* article.css */
/* ========================================
   文章详情页样式 - 双栏布局
   ======================================== */

/* 动画定义 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 文章页面 body */
.article-page-body {
    background: var(--color-background);
    min-height: 100vh;
}

/* ===== 双栏布局 ===== */
.article-layout {
    display: grid;
    grid-template-columns: 82% 18%;
    gap: 32px;
    max-width: 1600px;
    margin: 0 auto;
    padding: 32px 24px;
}

/* 左侧主内容 */
.article-primary {
    min-width: 0;
}

/* 右侧边栏 */
.article-sidebar {
    position: sticky;
    top: calc(var(--navbar-height) + 24px);
    height: fit-content;
    max-height: calc(100vh - var(--navbar-height) - 48px);
    overflow-y: auto;
}

/* 阅读进度条 */
.reading-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    z-index: 10000;
    transition: width 0.1s ease;
}

/* 文章容器 */
.article-page {
    max-width: 100%;
    margin: 0;
    padding: 0;
}

/* ===== 侧边栏组件 ===== */
.sidebar-section {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.sidebar-section-title {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 15px;
    font-weight: 600;
    color: #1f2937;
    margin: 0 0 16px 0;
    padding-bottom: 12px;
    border-bottom: 1px solid #e5e7eb;
}

.sidebar-section-title svg {
    color: var(--color-primary);
}

/* 侧边栏目录 */
.sidebar-toc {
    background: #fff;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.sidebar-toc-nav {
    list-style: none;
    padding: 0;
    margin: 0;
    max-height: 300px;
    overflow-y: auto;
}

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

.related-item {
    display: flex;
    gap: 12px;
    padding: 8px;
    border-radius: 8px;
    transition: background 0.2s;
}

.related-item:hover {
    background: #f9fafb;
}

.related-item-cover {
    width: 80px;
    height: 60px;
    border-radius: 6px;
    overflow: hidden;
    flex-shrink: 0;
}

.related-item-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.related-item-content {
    flex: 1;
    min-width: 0;
}

.related-item-title {
    font-size: 13px;
    font-weight: 500;
    margin: 0 0 4px 0;
    line-height: 1.4;
}

.related-item-title a {
    color: #1f2937;
    text-decoration: none;
}

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

.related-item-meta {
    font-size: 12px;
    color: #9ca3af;
}

.meta-dot {
    margin: 0 4px;
}

/* 文章统计 */
.article-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.stat-item {
    text-align: center;
    padding: 12px;
    background: #f9fafb;
    border-radius: 8px;
}

.stat-num {
    display: block;
    font-size: 20px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 12px;
    color: #6b7280;
}

/* 标签云 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-cloud-item {
    padding: 4px 12px;
    background: #f3f4f6;
    border-radius: 16px;
    font-size: 12px;
    color: #4b5563;
    text-decoration: none;
    transition: all 0.2s;
}

.tag-cloud-item:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary);
}

/* ===== 图片放大 Lightbox ===== */
.image-lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.92);
    z-index: 100000;
    display: none;
    align-items: center;
    justify-content: center;
}

.image-lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    text-align: center;
}

.lightbox-content img {
    max-width: 100%;
    max-height: 85vh;
    border-radius: 4px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.3);
}

.lightbox-caption {
    color: #e5e7eb;
    margin-top: 16px;
    font-size: 14px;
}

/* 文章内容中的可点击图片放大样式 */
.article-content img.zoomable {
    cursor: zoom-in;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.article-content img.zoomable:hover {
    transform: scale(1.01);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 24px;
    width: 44px;
    height: 44px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-size: 28px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

.lightbox-close:hover {
    background: rgba(255,255,255,0.2);
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 48px;
    height: 48px;
    border: none;
    background: rgba(255,255,255,0.1);
    color: #fff;
    font-size: 20px;
    border-radius: 50%;
    cursor: pointer;
    transition: background 0.2s;
}

.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255,255,255,0.2);
}

.lightbox-prev { left: 24px; }
.lightbox-next { right: 24px; }

/* 可放大图片样式 */
.zoomable {
    cursor: zoom-in;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.zoomable:hover {
    transform: scale(1.01);
    box-shadow: 0 6px 20px rgba(0,0,0,0.12);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .article-layout {
        grid-template-columns: 1fr;
    }
    
    .article-sidebar {
        position: static;
        max-height: none;
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }
    
    .sidebar-toc {
        display: none;
    }
}

@media (max-width: 768px) {
    .article-layout {
        padding: 16px 12px;
        gap: 16px;
    }
    
    .article-sidebar {
        grid-template-columns: 1fr;
    }
    
    .lightbox-prev,
    .lightbox-next {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }
    
    .lightbox-close {
        width: 36px;
        height: 36px;
        font-size: 22px;
    }
}

/* 文章头部 */
.article-header {
    text-align: center;
    margin-bottom: var(--spacing-12);
}

.article-category {
    margin-bottom: var(--spacing-4);
}

.category-link {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    background: var(--color-primary-soft);
    color: var(--color-primary);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 500;
    text-decoration: none;
    transition: var(--transition);
}

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

.article-title {
    font-size: 2.5rem;
    font-weight: 700;
    line-height: 1.3;
    color: var(--color-text);
    margin-bottom: var(--spacing-4);
    letter-spacing: -0.02em;
}

.article-excerpt {
    font-size: 1.2rem;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: var(--spacing-6);
    font-style: italic;
}

.article-meta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-4);
    flex-wrap: wrap;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-6);
}

.meta-left,
.meta-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
}

.author-link {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    color: var(--color-text);
    text-decoration: none;
    font-weight: 500;
}

.author-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.meta-divider {
    color: var(--color-text-muted);
}

.meta-item {
    display: flex;
    align-items: center;
    gap: 4px;
}

.meta-icon {
    opacity: 0.6;
}

.article-cover {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-top: var(--spacing-6);
}

.article-cover img {
    width: 100%;
    height: auto;
    display: block;
}

/* 文章主体布局 - 双栏 */
.article-body {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 24px;
    margin-bottom: 32px;
}

/* 文章目录 */
.article-toc {
    position: sticky;
    top: calc(var(--navbar-height) + var(--spacing-6));
    height: fit-content;
    max-height: calc(100vh - var(--navbar-height) - var(--spacing-12));
    overflow-y: auto;
}

.toc-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-4);
    padding-bottom: var(--spacing-3);
    border-bottom: 1px solid var(--color-border);
}

.toc-nav {
    list-style: none;
    padding: 0;
    margin: 0;
}

.toc-item {
    margin: 0;
}

.toc-item a {
    display: block;
    padding: var(--spacing-1) 0;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-decoration: none;
    border-left: 2px solid transparent;
    padding-left: var(--spacing-3);
    transition: var(--transition);
    line-height: 1.4;
}

.toc-item a:hover {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
}

.toc-item a.active {
    color: var(--color-primary);
    border-left-color: var(--color-primary);
    font-weight: 500;
}

.toc-level-3 a {
    padding-left: var(--spacing-5);
    font-size: var(--font-size-xs);
}

.toc-level-4 a {
    padding-left: var(--spacing-7);
    font-size: var(--font-size-xs);
}

/* 文章内容 - 与 article-body 同宽 */
.article-content {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text);
    word-wrap: break-word;
    grid-column: 1 / -1;
}

.article-content > *:first-child {
    margin-top: 0;
}

.article-content h2 {
    font-size: 1.8rem;
    font-weight: 700;
    margin: var(--spacing-10) 0 var(--spacing-4);
    padding-bottom: var(--spacing-3);
    border-bottom: 2px solid var(--color-border);
    color: var(--color-text);
    line-height: 1.3;
}

.article-content h3 {
    font-size: 1.4rem;
    font-weight: 600;
    margin: var(--spacing-8) 0 var(--spacing-3);
    color: var(--color-text);
    line-height: 1.4;
}

.article-content h4 {
    font-size: 1.2rem;
    font-weight: 600;
    margin: var(--spacing-6) 0 var(--spacing-3);
    color: var(--color-text);
}

.article-content p {
    margin-bottom: var(--spacing-4);
    text-align: justify;
    line-height: 1.8;
}

.article-content strong {
    font-weight: 600;
    color: var(--color-text);
}

.article-content em {
    font-style: italic;
}

.article-content a {
    color: var(--color-primary);
    text-decoration: underline;
    text-decoration-color: var(--color-primary-light);
    text-underline-offset: 3px;
    transition: var(--transition);
}

.article-content a:hover {
    color: var(--color-primary-dark);
    text-decoration-color: var(--color-primary);
}

.article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: var(--spacing-6) auto;
    display: block;
    box-shadow: var(--shadow-md);
}

/* 动态图片/GIF 样式 */
.article-content img[src*=".gif"],
.article-content img[src*="gif"] {
    animation: fadeIn 0.8s ease-in-out;
    cursor: pointer;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.article-content img[src*=".gif"]:hover,
.article-content img[src*="gif"]:hover {
    transform: scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
}

/* 图片懒加载占位 */
.article-content img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.5s ease-in;
}

.article-content img[loading="lazy"]:loaded {
    opacity: 1;
}

.article-content pre {
    background: #1e293b;
    color: #e2e8f0;
    padding: var(--spacing-5);
    border-radius: var(--border-radius);
    overflow-x: auto;
    margin: var(--spacing-6) 0;
    font-family: var(--font-family-mono);
    font-size: 0.9rem;
    line-height: 1.6;
    position: relative;
}

.article-content pre::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.article-content code {
    background: var(--color-background-alt);
    padding: 2px 6px;
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family-mono);
    font-size: 0.9em;
    color: var(--color-primary-dark);
}

.article-content pre code {
    background: none;
    padding: 0;
    color: inherit;
    font-size: inherit;
}

.article-content blockquote {
    border-left: 4px solid var(--color-primary);
    padding: var(--spacing-4) var(--spacing-5);
    margin: var(--spacing-6) 0;
    color: var(--color-text-light);
    font-style: italic;
    background: var(--color-primary-soft);
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
}

.article-content blockquote p:last-child {
    margin-bottom: 0;
}

.article-content ul,
.article-content ol {
    margin: var(--spacing-4) 0;
    padding-left: var(--spacing-6);
}

.article-content li {
    margin-bottom: var(--spacing-2);
    line-height: 1.7;
}

.article-content ul li::marker {
    color: var(--color-primary);
}

.article-content ol li::marker {
    color: var(--color-primary);
    font-weight: 600;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-6) 0;
    font-size: var(--font-size-sm);
}

.article-content th,
.article-content td {
    padding: var(--spacing-3) var(--spacing-4);
    border: 1px solid var(--color-border);
    text-align: left;
}

.article-content th {
    background: var(--color-background-alt);
    font-weight: 600;
}

.article-content tr:nth-child(even) {
    background: var(--color-background-alt);
}

.article-content hr {
    border: none;
    border-top: 1px solid var(--color-border);
    margin: var(--spacing-8) 0;
}

/* 视频样式 */
.article-content video {
    width: 100%;
    max-width: 100%;
    height: auto;
    border-radius: var(--border-radius);
    margin: var(--spacing-6) 0;
    display: block;
    background: #000;
    box-shadow: var(--shadow-md);
}

.article-content .video-wrapper {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    border-radius: var(--border-radius);
    margin: var(--spacing-6) 0;
    background: #000;
    box-shadow: var(--shadow-md);
}

.article-content .video-wrapper video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    margin: 0;
}

/* Motion Photo 容器：静图+视频叠加，hover 播放一次 */
.article-content .media-motion-wrap {
    position: relative;
    display: block;
    margin: var(--spacing-6) 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    background: #000;
    box-shadow: var(--shadow-md);
    cursor: pointer;
}

.article-content .media-motion-wrap img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 0;
    margin: 0; /* 覆盖 .article-content img 的段落 margin，避免容器内露出黑边 */
    box-shadow: none;
}

.article-content .media-motion-wrap video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
    background: #000;
    border-radius: 0;
    margin: 0;
}

.article-content .media-motion-wrap.playing video {
    opacity: 1;
}

/* 动态照片 LIVE 角标 */
.media-motion-wrap .mp-live-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    z-index: 2;
    background: rgba(0, 0, 0, 0.5);
    color: #fff;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.5px;
    padding: 3px 10px;
    border-radius: 20px;
    pointer-events: none;
    transition: opacity 0.2s ease;
}
.media-motion-wrap.playing .mp-live-badge {
    opacity: 0;
}
/* 浏览器无法解码（如 HEVC）时的提示角标：保持可见 */
.media-motion-wrap .mp-live-badge.mp-live-error {
    background: rgba(154, 103, 0, 0.85);
    opacity: 1;
}

/* 动态媒体（GIF/短视频）通用样式 */
.article-content .media-wrapper {
    position: relative;
    display: block;
    margin: var(--spacing-6) 0;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: #000;
}

.article-content .media-wrapper img,
.article-content .media-wrapper video {
    width: 100%;
    height: auto;
    display: block;
    margin: 0;
    border-radius: 0;
}

.article-content .media-wrapper .media-caption {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 10px 12px;
    background: linear-gradient(to top, rgba(0,0,0,0.65), rgba(0,0,0,0));
    color: #fff;
    font-size: 0.85rem;
    line-height: 1.4;
    opacity: 0;
    transition: opacity 0.25s ease;
    pointer-events: none;
}

.article-content .media-wrapper:hover .media-caption {
    opacity: 1;
}

/* 文章底部 */
.article-footer {
    padding-top: var(--spacing-8);
    border-top: 1px solid var(--color-border);
    margin-bottom: var(--spacing-12);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-6);
}

.tag-item {
    display: inline-block;
    padding: var(--spacing-1) var(--spacing-3);
    background: var(--color-background-alt);
    color: var(--color-text-light);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid var(--color-border);
}

.tag-item:hover {
    background: var(--color-primary-soft);
    color: var(--color-primary);
    border-color: var(--color-primary);
}

.article-actions {
    display: flex;
    gap: var(--spacing-3);
    justify-content: center;
}

.action-btn {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    padding: var(--spacing-2) var(--spacing-5);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-full);
    background: var(--color-background);
    color: var(--color-text);
    cursor: pointer;
    transition: var(--transition);
    font-size: var(--font-size-sm);
    text-decoration: none;
}

.action-btn:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-soft);
}

.action-btn .count {
    font-weight: 600;
}

/* 相关文章 */
.related-section {
    margin-bottom: var(--spacing-12);
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-6);
    color: var(--color-text);
    text-align: center;
}

.related-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-5);
}

.related-card {
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    background: var(--color-background);
}

.related-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
    transform: translateY(-2px);
}

.related-cover {
    display: block;
    aspect-ratio: 16/9;
    overflow: hidden;
}

.related-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.related-card:hover .related-cover img {
    transform: scale(1.05);
}

.related-content {
    padding: var(--spacing-4);
}

.related-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    margin-bottom: var(--spacing-2);
    line-height: 1.4;
}

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

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

.related-excerpt {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-2);
    line-height: 1.5;
}

.related-date {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

/* 评论区 */
.comments-section {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-6);
}

.comment-count {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 24px;
    height: 24px;
    padding: 0 8px;
    background: var(--color-primary-soft);
    color: var(--color-primary);
    border-radius: var(--border-radius-full);
    font-size: var(--font-size-sm);
    font-weight: 600;
}

.comment-form {
    background: var(--color-background-alt);
    padding: var(--spacing-5);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-8);
    border: 1px solid var(--color-border);
}

.form-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-3);
    margin-bottom: var(--spacing-3);
}

.comment-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--color-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.comment-prompt {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.comment-form textarea {
    width: 100%;
    padding: var(--spacing-3);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    resize: vertical;
    min-height: 100px;
    margin-bottom: var(--spacing-3);
    transition: var(--transition);
    background: var(--color-background);
}

.comment-form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.form-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.form-tip {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.btn-publish {
    padding: var(--spacing-2) var(--spacing-5);
    background: var(--color-primary);
    color: white;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
}

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

.login-prompt {
    text-align: center;
    padding: var(--spacing-8);
    background: var(--color-background-alt);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-8);
}

.login-prompt p {
    margin-bottom: var(--spacing-3);
    color: var(--color-text-light);
}

.btn-login {
    display: inline-block;
    padding: var(--spacing-2) var(--spacing-5);
    background: var(--color-primary);
    color: white;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

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

.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-5);
}

.comment-item {
    display: flex;
    gap: var(--spacing-3);
    padding: var(--spacing-4);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.comment-item:hover {
    box-shadow: var(--shadow-sm);
}

.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: var(--font-size-sm);
    flex-shrink: 0;
}

.comment-body {
    flex: 1;
    min-width: 0;
}

.comment-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-2);
}

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

.comment-date {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.comment-content {
    color: var(--color-text);
    line-height: 1.6;
    margin-bottom: var(--spacing-3);
}

.comment-actions {
    display: flex;
    gap: var(--spacing-4);
}

.btn-vote,
.btn-report {
    display: flex;
    align-items: center;
    gap: 4px;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    text-decoration: none;
    transition: var(--transition);
}

.btn-vote:hover,
.btn-report:hover {
    color: var(--color-primary);
}

.comment-replies {
    margin-top: var(--spacing-4);
    padding-left: var(--spacing-5);
    border-left: 2px solid var(--color-border);
}

.reply-item {
    display: flex;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-3);
}

.reply-avatar {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--color-background-alt);
    color: var(--color-text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    font-weight: 600;
    flex-shrink: 0;
}

.reply-body {
    flex: 1;
}

.reply-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-2);
    margin-bottom: var(--spacing-1);
}

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

.reply-date {
    color: var(--color-text-muted);
    font-size: var(--font-size-xs);
}

.reply-content {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    line-height: 1.5;
}

.no-comments {
    text-align: center;
    padding: var(--spacing-8);
    color: var(--color-text-muted);
}

/* 响应式 */
@media (max-width: 768px) {
    .article-page {
        padding: var(--spacing-6) var(--spacing-4);
    }
    
    .article-title {
        font-size: 1.8rem;
    }
    
    .article-excerpt {
        font-size: 1rem;
    }
    
    .article-meta {
        flex-direction: column;
        gap: var(--spacing-2);
    }
    
    .article-body {
        grid-template-columns: 1fr;
    }
    
    .article-toc {
        position: static;
        max-height: none;
        margin-bottom: var(--spacing-6);
        padding: var(--spacing-4);
        background: var(--color-background-alt);
        border-radius: var(--border-radius);
    }
    
    .toc-nav {
        display: flex;
        flex-wrap: wrap;
        gap: var(--spacing-2);
    }
    
    .toc-item a {
        border-left: none;
        padding: var(--spacing-1) var(--spacing-2);
        background: var(--color-background);
        border-radius: var(--border-radius-sm);
        font-size: var(--font-size-xs);
    }
    
    .toc-item a:hover,
    .toc-item a.active {
        background: var(--color-primary);
        color: white;
    }
    
    .article-content {
        font-size: 1rem;
    }
    
    .article-content h2 {
        font-size: 1.5rem;
    }
    
    .article-content h3 {
        font-size: 1.2rem;
    }
    
    .article-actions {
        flex-wrap: wrap;
    }
    
    .related-grid {
        grid-template-columns: 1fr;
    }
    
    .comment-item {
        flex-direction: column;
    }
    
    .comment-replies {
        padding-left: var(--spacing-3);
    }
}

/* 文章页面页脚 */
.article-page-body .footer {
    background: var(--color-background-alt);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-6) 0;
    text-align: center;
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

/* ===== 分享弹窗 ===== */
.share-modal {
    display: none !important;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 9999;
    justify-content: center;
    align-items: center;
}

.share-modal.active {
    display: flex !important;
}

.share-modal-content {
    background: white;
    border-radius: 16px;
    padding: 24px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.share-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid #e5e7eb;
}

.share-modal-header h3 {
    margin: 0;
    font-size: 18px;
    color: #1f2937;
}

.share-close {
    background: none;
    border: none;
    font-size: 28px;
    color: #6b7280;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s;
}

.share-close:hover {
    background: #f3f4f6;
    color: #1f2937;
}

.share-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.share-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 8px;
    border: none;
    background: none;
    cursor: pointer;
    border-radius: 12px;
    transition: all 0.2s;
}

.share-option:hover {
    background: #f3f4f6;
    transform: translateY(-2px);
}

.share-option svg {
    width: 40px;
    height: 40px;
    display: block;
}

.share-option span {
    font-size: 12px;
    color: #4b5563;
    font-weight: 500;
    margin-top: 4px;
}

@media (max-width: 640px) {
    .share-options {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .share-option svg {
        width: 32px;
        height: 32px;
    }
    
    .share-option span {
        font-size: 11px;
    }
}

/* ===== 微信二维码弹窗 ===== */
.wechat-qrcode-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    z-index: 99999 !important;
    justify-content: center;
    align-items: center;
}

.wechat-qrcode-modal.active {
    display: flex !important;
}

.wechat-qrcode-modal * {
    z-index: 100000 !important;
}

.wechat-qrcode-content {
    background: white;
    border-radius: 16px;
    padding: 24px;
    width: 90%;
    max-width: 320px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}

.wechat-qrcode-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.wechat-qrcode-header h3 {
    margin: 0;
    font-size: 18px;
    color: #1f2937;
}

.qrcode-close {
    background: none;
    border: none;
    font-size: 28px;
    color: #6b7280;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.2s;
}

.qrcode-close:hover {
    background: #f3f4f6;
    color: #1f2937;
}

.wechat-qrcode-body {
    display: flex;
    flex-direction: column;
    align-items: center;
}

#qrcode-container {
    margin-bottom: 16px;
    padding: 16px;
    background: #f9fafb;
    border-radius: 12px;
}

#qrcode-container img {
    display: block;
    margin: 0 auto;
    max-width: 200px;
    height: auto;
}

.qrcode-tip {
    font-size: 14px;
    color: #6b7280;
    text-align: center;
    line-height: 1.5;
}