/*
Theme Name: suyihang15
Theme URI: https://suyihang15.com/
Author: suyihang15
Author URI: https://suyihang15.com/
Description: 简洁现代博客主题，支持暗色模式、文章目录、代码复制、分享按钮、QQ头像等功能。
Version: 2.8-AppleFrosted
License: MIT License
License URI: https://opensource.org/licenses/MIT
Text Domain: suyihang15
Tags: blog, custom-logo, custom-menu, responsive-layout, translation-ready
*/

/* ============================================
   设计变量 (Apple 纯净美学与毛玻璃材质体系)
   ============================================ */
:root {
    --primary: #0071e3;
    --primary-hover: #0077ed;
    --primary-light: rgba(0, 113, 227, 0.08);
    --primary-glow: rgba(0, 113, 227, 0.22);
    
    /* 亮色模式表面与毛玻璃 */
    --bg: #f5f5f7;
    --bg-card: rgba(255, 255, 255, 0.82);
    --bg-card-hover: rgba(255, 255, 255, 0.94);
    --bg-card-solid: #ffffff;
    --bg-secondary: rgba(242, 242, 247, 0.85);
    --bg-header: rgba(245, 245, 247, 0.78);
    
    --text: #1d1d1f;
    --text-secondary: #6e6e73;
    --text-muted: #86868b;
    
    --border: rgba(0, 0, 0, 0.08);
    --border-hover: rgba(0, 0, 0, 0.16);
    
    /* 毛玻璃核心滤镜 */
    --glass-blur: blur(20px) saturate(180%);

    /* 苹果字体规范栈 */
    --font-sans: -apple-system, BlinkMacSystemFont, "SF Pro Text", "SF Pro Display", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
    --font-mono: "SF Mono", "Menlo", "Monaco", "Consolas", "Fira Code", monospace;

    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;

    /* 圆角体系 */
    --radius-xs: 6px;
    --radius-sm: 10px;
    --radius: 12px;
    --radius-lg: 18px;
    --radius-full: 999px;

    /* 统一动效曲线 */
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);

    /* 亮色模式阴影 */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.05);
    --shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 16px 36px -6px rgba(0, 0, 0, 0.12);

    /* 站点背景图（由主题设置注入，未设置时回退为装饰渐变） */
    --bg-image: radial-gradient(circle at 50% 0%, rgba(0, 113, 227, 0.035) 0%, transparent 55%);
}

/* ============================================
   暗色模式色彩变量 (macOS / iOS Dark)
   ============================================ */
@media (prefers-color-scheme: dark) {
    /* 无 JS 时的回退；有 JS 时由 <html> 上的 dark-mode / light-mode 类决定 */
    html:not(.light-mode):not(.dark-mode) {
        --primary: #2997ff;
        --primary-hover: #47a6ff;
        --primary-light: rgba(41, 151, 255, 0.15);
        --primary-glow: rgba(41, 151, 255, 0.3);

        --bg: #000000;
        --bg-card: rgba(28, 28, 30, 0.78);
        --bg-card-hover: rgba(44, 44, 46, 0.88);
        --bg-card-solid: #1c1c1e;
        --bg-secondary: rgba(44, 44, 46, 0.65);
        --bg-header: rgba(18, 18, 20, 0.78);

        --text: #f5f5f7;
        --text-secondary: #a1a1a6;
        --text-muted: #86868b;

        --border: rgba(255, 255, 255, 0.1);
        --border-hover: rgba(255, 255, 255, 0.2);

        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.5);
        --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.6);
        --shadow-lg: 0 16px 36px -6px rgba(0, 0, 0, 0.75);
    }
}

html.dark-mode {
    --primary: #2997ff;
    --primary-hover: #47a6ff;
    --primary-light: rgba(41, 151, 255, 0.15);
    --primary-glow: rgba(41, 151, 255, 0.3);

    --bg: #000000;
    --bg-card: rgba(28, 28, 30, 0.78);
    --bg-card-hover: rgba(44, 44, 46, 0.88);
    --bg-card-solid: #1c1c1e;
    --bg-secondary: rgba(44, 44, 46, 0.65);
    --bg-header: rgba(18, 18, 20, 0.78);

    --text: #f5f5f7;
    --text-secondary: #a1a1a6;
    --text-muted: #86868b;

    --border: rgba(255, 255, 255, 0.1);
    --border-hover: rgba(255, 255, 255, 0.2);

    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow: 0 4px 16px -2px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 24px -4px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 16px 36px -6px rgba(0, 0, 0, 0.75);
}

/* ============================================
   基础重置与优雅排版
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.72;
    color: var(--text);
    background-color: var(--bg);
    background-image: var(--bg-image);
    background-repeat: no-repeat;
    background-position: center top;
    background-size: cover;
    background-attachment: fixed;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* 文本选取苹果浅蓝微透质感 */
::selection {
    background: var(--primary-light);
    color: var(--primary);
}

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

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

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

/* ============================================
   阅读进度条
   ============================================ */
.reading-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), #34c759);
    z-index: 9999;
    transition: width 0.12s ease;
    box-shadow: 0 0 8px var(--primary-glow);
}

/* ============================================
   布局容器
   ============================================ */
.site-wrapper {
    max-width: 1360px;
    margin: 0 auto;
    padding: 0 var(--space-xl);
}

.site-main {
    padding: var(--space-xl) 0 var(--space-2xl);
}

.content-with-sidebar {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--space-xl);
    align-items: start;
}

.content-with-sidebar:has(.sidebar) {
    grid-template-columns: minmax(0, 1fr) 320px;
}

.content-area {
    min-width: 0;
}

.content-area-full {
    min-width: 0;
    width: 100%;
}

/* ============================================
   头部 (毛玻璃悬浮顶栏)
   ============================================ */
.site-header {
    background: var(--bg-header);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--border);
    padding: 0.85rem 0;
    margin-bottom: 0;
    position: sticky;
    top: 0;
    z-index: 100;
    transition: var(--transition);
}

.site-header.scrolled {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.04);
}

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

.site-branding {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.custom-logo-link img {
    max-height: 38px;
    width: auto;
    border-radius: var(--radius-xs);
}

.site-title {
    font-size: 1.25rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin: 0;
}

.site-title a {
    color: var(--text);
}

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

.site-description {
    display: none;
}

/* 移动端精简头部 */
.header-actions {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.header-desktop-tools {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.desktop-only {
    display: flex;
}

.mobile-menu-close {
    display: none;
}

.mobile-nav-search {
    display: none;
}

.mobile-nav-tools {
    display: none;
}

.mobile-nav-social {
    display: none;
}

/* 搜索框 (温润圆润胶囊) */
.search-form {
    display: flex;
    align-items: center;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    padding: 3px 6px 3px 12px;
    transition: var(--transition);
}

.search-form:focus-within {
    background: var(--bg-card-solid);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.search-field {
    border: none;
    background: transparent;
    padding: 0.25rem 0.5rem 0.25rem 0;
    font-size: 0.875rem;
    outline: none;
    width: 150px;
    color: var(--text);
    font-family: var(--font-sans);
    transition: width 0.25s ease;
}

.search-form:focus-within .search-field {
    width: 180px;
}

.search-submit {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    cursor: pointer;
    font-size: 0.8125rem;
    font-weight: 500;
    transition: var(--transition);
}

.search-submit:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

/* 导航菜单 (胶囊风格项) */
.site-nav {
    display: flex;
    align-items: center;
}

.menu-items {
    display: flex;
    list-style: none;
    gap: 0.4rem;
    margin: 0;
    padding: 0;
}

.menu-items li {
    position: relative;
}

.menu-items li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.4rem 0.85rem;
    border-radius: var(--radius-sm);
    display: inline-block;
    transition: var(--transition);
}

.menu-items li a:hover,
.menu-items li.current-menu-item a {
    color: var(--primary);
    background: var(--primary-light);
}

.menu-fallback {
    display: flex;
    gap: var(--space-md);
}

.menu-fallback a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
}

.menu-fallback a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 0.45rem;
    color: var(--text);
    transition: var(--transition);
}

.mobile-menu-toggle:hover {
    color: var(--primary);
}

.mobile-menu-toggle svg {
    width: 20px;
    height: 20px;
    display: block;
}

/* 社交链接小徽章 */
.site-social {
    display: flex;
    gap: 6px;
}

.social-item {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 600;
    transition: var(--transition);
}

.social-item:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--primary-glow);
}

/* Banner */
.site-banner {
    background: linear-gradient(135deg, var(--primary) 0%, #0077ed 100%);
    color: white;
    padding: 1rem var(--space-xl);
    text-align: center;
    margin-bottom: var(--space-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 20px -4px var(--primary-glow);
}

.site-banner p {
    margin: 0;
    font-size: 0.95rem;
    font-weight: 500;
}

/* ============================================
   面包屑导航
   ============================================ */
.breadcrumbs {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xs);
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: var(--space-lg);
    padding: 0.35rem 0;
}

.breadcrumbs a {
    color: var(--text-secondary);
}

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

.breadcrumb-sep {
    color: var(--text-muted);
    opacity: 0.4;
}

.breadcrumb-current {
    color: var(--text);
    font-weight: 500;
}

/* ============================================
   首页个人资料 (毛玻璃 Hero 卡片)
   ============================================ */
.homepage-profile {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    margin-bottom: var(--space-xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: var(--space-xl);
    align-items: center;
    transition: var(--transition);
}

.homepage-profile:hover {
    box-shadow: var(--shadow-md);
}

.profile-cover {
    display: flex;
    justify-content: center;
}

.profile-cover img {
    width: 100%;
    max-width: 220px;
    border-radius: 50%;
    aspect-ratio: 1;
    object-fit: cover;
    border: 4px solid var(--bg-card-solid);
    box-shadow: var(--shadow-md);
}

.profile-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.profile-title {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -0.025em;
    margin: 0;
    color: var(--text);
}

.profile-tagline {
    font-size: 1.1rem;
    color: var(--primary);
    font-weight: 500;
    margin: 0;
}

.profile-intro {
    color: var(--text-secondary);
    line-height: 1.75;
    margin: 0;
    font-size: 0.95rem;
}

.profile-details {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: var(--space-xs);
}

.profile-details span {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.3rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
}

/* ============================================
   文章列表 (毛玻璃博客卡片)
   ============================================ */
#post-list,
.post-list {
    display: grid;
    gap: var(--space-lg);
}

article.post {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
}

article.post:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
}

article header {
    margin-bottom: var(--space-md);
}

.entry-title {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: -0.015em;
    margin-bottom: var(--space-sm);
    line-height: 1.4;
}

.entry-title a {
    color: var(--text);
}

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

.entry-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.entry-meta span {
    display: inline-flex;
    align-items: center;
}

.meta-sep {
    opacity: 0.4;
}

.entry-content,
.entry-excerpt {
    color: var(--text-secondary);
    line-height: 1.75;
    margin-bottom: var(--space-md);
    font-size: 0.95rem;
}

.entry-content p,
.entry-excerpt p {
    margin-bottom: var(--space-md);
}

.entry-content p:last-child,
.entry-excerpt p:last-child {
    margin-bottom: 0;
}

.entry-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border);
}

.read-more {
    color: var(--primary);
    font-weight: 500;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.read-more:hover {
    color: var(--primary-hover);
    transform: translateX(2px);
}

.entry-cats {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.entry-cats a {
    color: var(--text-secondary);
    padding: 2px 8px;
    background: var(--bg-secondary);
    border-radius: var(--radius-xs);
}

.entry-cats a:hover {
    color: var(--primary);
    background: var(--primary-light);
}

/* ============================================
   单篇文章排版 (Single Post)
   ============================================ */
.single article.post {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.single .entry-title {
    font-size: 2.15rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.32;
    margin-bottom: var(--space-md);
    color: var(--text);
}

.single .entry-content {
    font-size: 1.0625rem;
    line-height: 1.82;
    color: var(--text);
}

.single .entry-content h2 {
    font-size: 1.65rem;
    font-weight: 600;
    letter-spacing: -0.015em;
    margin-top: var(--space-2xl);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 1px solid var(--border);
    color: var(--text);
}

.single .entry-content h3 {
    font-size: 1.35rem;
    font-weight: 600;
    margin-top: var(--space-xl);
    margin-bottom: var(--space-md);
    color: var(--text);
}

.single .entry-content h4 {
    font-size: 1.15rem;
    font-weight: 600;
    margin-top: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--text);
}

.single .entry-content p {
    margin-bottom: var(--space-md);
}

.single .entry-content img {
    border-radius: var(--radius);
    margin: var(--space-lg) auto;
    box-shadow: var(--shadow-sm);
}

.single .entry-content blockquote {
    border-left: 3px solid var(--primary);
    background: var(--primary-light);
    padding: var(--space-md) var(--space-lg);
    margin: var(--space-lg) 0;
    border-radius: 0 var(--radius) var(--radius) 0;
}

.single .entry-content blockquote p {
    margin: 0;
    color: var(--text-secondary);
    font-style: normal;
}

/* macOS 风格红黄绿代码视窗 */
.single .entry-content pre {
    background: #1e1e22;
    color: #e2e8f0;
    padding: var(--space-lg);
    padding-top: 2.6rem;
    border-radius: var(--radius);
    overflow-x: auto;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.65;
    margin: var(--space-lg) 0;
    position: relative;
    box-shadow: var(--shadow-md);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.single .entry-content pre::before {
    content: '';
    position: absolute;
    top: 14px;
    left: 16px;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ff5f56;
    box-shadow: 16px 0 0 #ffbd2e, 32px 0 0 #27c93f;
}

.single .entry-content code {
    background: var(--bg-secondary);
    padding: 0.15rem 0.4rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.875em;
    color: var(--primary);
}

.single .entry-content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.single .entry-content ul,
.single .entry-content ol {
    margin: var(--space-md) 0;
    padding-left: var(--space-xl);
}

.single .entry-content li {
    margin-bottom: var(--space-xs);
}

.single .entry-content table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--space-lg) 0;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border);
}

.single .entry-content table th,
.single .entry-content table td {
    border: 1px solid var(--border);
    padding: var(--space-sm) var(--space-md);
    text-align: left;
}

.single .entry-content table th {
    background: var(--bg-secondary);
    font-weight: 600;
}

/* 代码复制按钮 (半透明磨砂小胶囊) */
.code-copy-btn {
    position: absolute;
    top: 0.6rem;
    right: 0.8rem;
    background: rgba(255, 255, 255, 0.12);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    color: #e2e8f0;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-xs);
    padding: 0.2rem 0.6rem;
    font-size: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
}

.code-copy-btn:hover {
    background: rgba(255, 255, 255, 0.22);
}

.code-copy-btn.copied {
    background: #10b981;
    border-color: #10b981;
    color: #ffffff;
}

/* ============================================
   文章目录 (TOC - 磨砂折叠面板)
   ============================================ */
.toc-container {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: var(--space-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.toc-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-lg);
    background: var(--bg-secondary);
    border-bottom: 1px solid var(--border);
}

.toc-title {
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--text);
}

.toc-toggle {
    background: none;
    border: none;
    cursor: pointer;
    color: var(--text-secondary);
    padding: 0.25rem;
    border-radius: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
}

.toc-toggle:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.toc-toggle.collapsed svg {
    transform: rotate(-90deg);
}

.toc-list {
    padding: var(--space-sm) 0;
    max-height: 400px;
    overflow-y: auto;
    transition: max-height 0.3s ease;
}

.toc-list.collapsed {
    max-height: 0;
    padding: 0;
    overflow: hidden;
}

.toc-item {
    display: block;
    padding: 0.4rem var(--space-lg);
    color: var(--text-secondary);
    font-size: 0.875rem;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.toc-item:hover {
    color: var(--primary);
    background: var(--primary-light);
}

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

/* ============================================
   文章元信息（阅读时间、字数）
   ============================================ */
.entry-meta-extra {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-top: var(--space-sm);
    padding-top: var(--space-sm);
    border-top: 1px dashed var(--border);
}

.entry-meta-extra span {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

/* ============================================
   分享按钮 (轻量圆角按钮)
   ============================================ */
.share-buttons {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
    padding: var(--space-md) 0;
    margin: var(--space-lg) 0;
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.share-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.share-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.35rem 0.85rem;
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.share-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px var(--primary-glow);
}

/* ============================================
   上下篇导航
   ============================================ */
.post-navigation {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-md);
    margin: var(--space-xl) 0;
}

.post-nav-prev,
.post-nav-next {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: var(--space-lg);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    box-shadow: var(--shadow-sm);
}

.post-nav-prev:hover,
.post-nav-next:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow);
    transform: translateY(-2px);
}

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

.post-nav-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.post-nav-title {
    font-size: 0.9375rem;
    color: var(--text);
    font-weight: 500;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.post-nav-empty {
    visibility: hidden;
}

/* ============================================
   评论区 (毛玻璃质感面板)
   ============================================ */
.comments-area {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--space-xl);
    margin-top: var(--space-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.comments-title {
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin-bottom: var(--space-lg);
    color: var(--text);
}

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

.comment {
    padding: var(--space-lg);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: var(--space-md);
    background: rgba(255, 255, 255, 0.45);
    transition: var(--transition);
}

html.dark-mode .comment {
    background: rgba(255, 255, 255, 0.03);
}

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

.comment-body {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.comment-meta {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-xs);
}

.comment-author {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
}

.comment-author img.avatar {
    border-radius: 50%;
    width: 44px;
    height: 44px;
    object-fit: cover;
    box-shadow: var(--shadow-sm);
}

.comment-author .fn {
    font-weight: 600;
    color: var(--text);
    font-size: 0.95rem;
}

.comment-metadata {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

.comment-metadata a {
    color: var(--text-muted);
}

.comment-metadata a:hover {
    color: var(--primary);
}

.comment-content {
    color: var(--text-secondary);
    line-height: 1.68;
    margin: var(--space-xs) 0;
    padding-left: 54px;
}

.comment-content p {
    margin: 0;
}

.reply {
    margin-top: var(--space-xs);
    padding-left: 54px;
}

.reply a {
    font-size: 0.8125rem;
    color: var(--primary);
    font-weight: 500;
}

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

.comment-awaiting-moderation {
    color: #f59e0b;
    font-size: 0.875rem;
    font-style: italic;
    margin: var(--space-xs) 0;
    padding-left: 54px;
}

/* 评论表单 */
.comment-form {
    margin-top: var(--space-xl);
    padding-top: var(--space-xl);
    border-top: 1px solid var(--border);
}

.comment-form label {
    display: block;
    margin-bottom: var(--space-xs);
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text);
}

.comment-form .required {
    color: #ef4444;
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form textarea {
    width: 100%;
    padding: 0.75rem 0.9rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    font-family: var(--font-sans);
    font-size: 0.9375rem;
    margin-bottom: var(--space-md);
    transition: var(--transition);
    background: var(--bg-secondary);
    color: var(--text);
}

.comment-form input:focus,
.comment-form textarea:focus {
    outline: none;
    background: var(--bg-card-solid);
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.comment-form textarea {
    resize: vertical;
    min-height: 120px;
}

.comment-form .submit {
    background: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 2.2rem;
    border-radius: var(--radius-full);
    font-size: 0.9375rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 12px var(--primary-glow);
}

.comment-form .submit:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 16px var(--primary-glow);
}

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

/* ============================================
   侧边栏 (微晶毛玻璃小工具)
   ============================================ */
.sidebar {
    position: sticky;
    top: 80px;
}

.widget {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    margin-bottom: var(--space-lg);
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}

.widget:hover {
    box-shadow: var(--shadow);
}

.widget-title {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid var(--primary);
    color: var(--text);
    display: inline-block;
}

.widget ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.widget ul li {
    padding: 0.55rem 0;
    border-bottom: 1px dashed var(--border);
    transition: var(--transition);
}

.widget ul li:last-child {
    border-bottom: none;
}

.widget ul li a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    display: block;
    transition: var(--transition);
}

.widget ul li a:hover {
    color: var(--primary);
    transform: translateX(3px);
}

/* ============================================
   页面
   ============================================ */
.page article.page {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    box-shadow: var(--shadow);
    border: 1px solid var(--border);
}

.page .entry-title {
    font-size: 2rem;
    margin-bottom: var(--space-lg);
}

.page .entry-content {
    font-size: 1.0625rem;
    line-height: 1.8;
}

/* ============================================
   归档和搜索
   ============================================ */
.archive-header,
.page-header {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    padding: var(--space-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--space-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.archive-title,
.page-title {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.015em;
    margin: 0;
    color: var(--text);
}

.archive-title span,
.page-title span {
    color: var(--primary);
}

.archive-description,
.search-results-count {
    color: var(--text-secondary);
    margin-top: var(--space-sm);
    font-size: 0.9375rem;
}

.search-header {
    margin-bottom: var(--space-xl);
}

.no-results {
    text-align: center;
    padding: var(--space-2xl);
    color: var(--text-secondary);
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.no-results .search-form {
    margin-top: var(--space-lg);
    max-width: 400px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================
   页脚
   ============================================ */
.site-footer {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-top: 1px solid var(--border);
    padding: var(--space-2xl) 0 var(--space-xl);
    margin-top: var(--space-2xl);
    text-align: center;
    color: var(--text-muted);
    font-size: 0.875rem;
}

.site-footer p {
    margin: var(--space-sm) 0;
}

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

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

/* 页脚友链与打赏 */
.footer-actions-grid {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
    text-align: left;
}

.footer-actions-grid--single {
    grid-template-columns: 1fr;
    max-width: 600px;
    margin: 0 auto var(--space-xl);
}

.footer-actions {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--border);
}

/* 打赏：折叠面板 + 二维码卡片网格 */
.donate-details {
    border: none;
    background: transparent;
}

.donate-details summary {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    padding: var(--space-xs) 0;
    color: var(--text);
    list-style: none;
    transition: var(--transition);
}

.donate-details summary:hover {
    color: var(--primary);
}

.donate-details summary::-webkit-details-marker {
    display: none;
}

.donate-details summary::marker {
    content: "";
}

.donate-summary-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background: var(--primary-light);
    color: var(--primary);
    flex-shrink: 0;
}

.donate-summary-text {
    flex: 1 1 auto;
    text-align: left;
}

.donate-chevron {
    display: inline-flex;
    color: var(--text-muted);
    flex-shrink: 0;
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.donate-details[open] .donate-chevron {
    transform: rotate(180deg);
}

.donate-box {
    margin-top: var(--space-md);
}

.donate-desc {
    margin: 0 0 var(--space-md);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
    text-align: left;
}

.donate-methods {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: var(--space-md);
}

.donate-method {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    margin: 0;
    padding: var(--space-md) var(--space-sm);
    background: var(--bg-card-solid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

/* 二维码统一放进白底卡片：暗色模式下也能正常被扫 */
.donate-qr-wrap {
    display: flex;
    justify-content: center;
    padding: 8px;
    background: #fff;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-sm);
    line-height: 0;
    max-width: 100%;
}

.donation-qr {
    display: block;
    width: 150px;
    max-width: 100%;
    height: auto;
    border-radius: 4px;
}

.donate-method figcaption {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    max-width: 100%;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: center;
}

.donate-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.0625rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.6875rem;
    font-weight: 600;
    line-height: 1.6;
    color: #fff;
}

.donate-badge--wechat {
    background: #07c160;
}

.donate-badge--alipay {
    background: #1677ff;
}

.donate-account {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--text);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    padding: 0.125rem 0.5rem;
    max-width: 100%;
    overflow-wrap: anywhere;
}

.footer-links-showcase {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    border: 1px solid var(--border);
}

.footer-links-showcase-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: var(--space-md);
    color: var(--text);
}

.footer-links-showcase-title svg {
    color: var(--primary);
}

.footer-links-count {
    background: var(--primary-light);
    color: var(--primary);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.footer-links-mini-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(90px, 1fr));
    gap: var(--space-md);
}

.footer-link-mini {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-sm);
    border-radius: var(--radius);
    transition: var(--transition);
    text-decoration: none;
}

.footer-link-mini:hover {
    background: var(--bg-card);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.footer-link-mini-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    overflow: hidden;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

.footer-link-mini-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.footer-link-mini-name {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    text-align: center;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 100%;
}

.footer-links-more {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    margin-top: var(--space-md);
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
}

.footer-links-more:hover {
    gap: var(--space-sm);
}

/* ============================================
   友链样式（数据来自后台「链接」）
   ============================================ */
.friend-card {
    display: flex;
    flex-direction: column;
    height: 100%;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid var(--border);
}

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

.friend-card-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.friend-icon-link {
    flex-shrink: 0;
    border-radius: 50%;
    transition: var(--transition);
}

.friend-icon-link:hover {
    transform: scale(1.05);
}

.friend-icon {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    object-fit: cover;
}

.friend-info {
    flex: 1;
    min-width: 0;
}

.friend-name {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-xs) var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin: 0 0 var(--space-xs) 0;
}

.friend-name a {
    color: var(--text);
}

.friend-name a:hover {
    color: var(--primary);
}

/* 域名小标签：描述为空时卡片也不会显得空 */
.friend-host {
    flex-shrink: 0;
    max-width: 100%;
    padding: 0.0625rem 0.4375rem;
    border-radius: var(--radius-full);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.6875rem;
    font-weight: 500;
    line-height: 1.5;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.friend-description {
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--text-secondary);
    margin: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

/* 最新文章行固定在卡片底部，网格里多张卡片高度更整齐 */
.friend-latest-post {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    min-width: 0;
    margin-top: auto;
    padding-top: var(--space-md);
    border-top: 1px solid var(--border);
    font-size: 0.8125rem;
}

.friend-latest-tag {
    flex-shrink: 0;
    display: inline-flex;
    align-items: center;
    padding: 0.0625rem 0.4375rem;
    border-radius: var(--radius-xs);
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.6875rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    line-height: 1.6;
}

.latest-post-title {
    flex: 1 1 auto;
    min-width: 0;
    color: var(--text);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

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

.latest-post-date {
    flex-shrink: 0;
    color: var(--text-muted);
    font-size: 0.75rem;
    font-variant-numeric: tabular-nums;
}

.no-latest-post {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    min-width: 0;
    color: var(--text-muted);
    font-size: 0.8125rem;
}

.no-latest-post svg {
    flex-shrink: 0;
    opacity: 0.75;
}

/* ============================================
   返回顶部与浮动控制按钮 (毛玻璃浮动球)
   ============================================ */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    z-index: 99;
    box-shadow: var(--shadow);
    color: var(--text-secondary);
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px var(--primary-glow);
}

.reading-mode-toggle {
    position: fixed;
    bottom: 5.2rem;
    right: 2rem;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    transition: var(--transition);
    z-index: 99;
}

.reading-mode-toggle:hover {
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 14px var(--primary-glow);
}

/* 阅读模式纯粹排版 */
body.reading-mode .site-header,
body.reading-mode .site-footer,
body.reading-mode .sidebar,
body.reading-mode .back-to-top,
body.reading-mode .share-buttons,
body.reading-mode .related-posts,
body.reading-mode .post-navigation,
body.reading-mode .comments-area,
body.reading-mode .font-size-controls,
body.reading-mode .toc-container,
body.reading-mode .reading-progress-bar,
body.reading-mode .breadcrumbs {
    display: none !important;
}

body.reading-mode .content-with-sidebar {
    grid-template-columns: 1fr;
}

body.reading-mode .site-wrapper {
    max-width: 740px;
    margin: 0 auto;
    padding: var(--space-xl);
}

body.reading-mode article.post {
    box-shadow: none;
    border: none;
    padding: 0;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

/* ============================================
   字号调节控件
   ============================================ */
.font-size-controls {
    display: inline-flex;
    align-items: center;
    gap: 2px;
    margin-bottom: var(--space-md);
    padding: 2px 6px;
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
    border: 1px solid var(--border);
}

.font-size-btn {
    background: none;
    border: none;
    border-radius: var(--radius-full);
    padding: 2px 8px;
    cursor: pointer;
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: var(--transition);
    font-weight: 500;
}

.font-size-btn:hover,
.font-size-btn.active {
    background: var(--bg-card-solid);
    color: var(--primary);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

/* ============================================
   相关文章
   ============================================ */
.related-posts {
    margin: var(--space-2xl) 0;
    padding: var(--space-xl);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
}

.related-posts-title {
    font-size: 1.15rem;
    margin-bottom: var(--space-lg);
    color: var(--text);
    font-weight: 600;
}

.related-posts-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
}

.related-post-item {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.related-post-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.related-post-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.related-post-item:hover .related-post-thumb img {
    transform: scale(1.05);
}

.related-post-title {
    padding: var(--space-sm) var(--space-md) 0;
    font-size: 0.92rem;
    line-height: 1.4;
    font-weight: 500;
}

.related-post-title a {
    color: var(--text);
}

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

.related-post-date {
    display: block;
    padding: var(--space-xs) var(--space-md) var(--space-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ============================================
   分页导航
   ============================================ */
.pagination {
    margin: var(--space-2xl) 0;
    text-align: center;
}

.pagination .page-numbers {
    display: inline-flex;
    list-style: none;
    gap: var(--space-xs);
    padding: 0;
    margin: 0;
}

.pagination .page-numbers li {
    display: inline;
}

.pagination .page-numbers a,
.pagination .page-numbers .current {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 38px;
    height: 38px;
    padding: 0 var(--space-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    transition: var(--transition);
}

.pagination .page-numbers a:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: var(--primary-light);
}

.pagination .page-numbers .current {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
    box-shadow: 0 2px 8px var(--primary-glow);
}

/* ============================================
   搜索建议与结果页
   ============================================ */
.search-suggestions {
    margin-bottom: var(--space-xl);
    padding: var(--space-lg);
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-radius: var(--radius);
    border: 1px solid var(--border);
}

.search-suggestions h3 {
    font-size: 0.95rem;
    margin-bottom: var(--space-md);
    color: var(--text-secondary);
    font-weight: 500;
}

.search-suggestions ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: grid;
    gap: var(--space-sm);
}

.search-suggestions li a {
    display: block;
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-secondary);
    border-radius: var(--radius);
    color: var(--text);
    transition: var(--transition);
}

.search-suggestions li a:hover {
    background: var(--primary-light);
    color: var(--primary);
}

/* ============================================
   文章标签
   ============================================ */
.post-tags {
    margin: var(--space-xl) 0;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.post-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
}

.post-tag:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-1px);
}

/* ============================================
   最后更新时间
   ============================================ */
.meta-updated {
    display: inline-block;
    margin-left: var(--space-sm);
    padding: 2px 8px;
    background: var(--primary-light);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--primary);
    font-weight: 500;
}

/* ============================================
   文章缩略图（列表横排）
   ============================================ */
.post-list article.post {
    display: flex;
    flex-direction: row;
}

.post-list .post-thumbnail {
    display: block;
    width: 220px;
    min-width: 220px;
    height: 146px;
    margin-right: var(--space-lg);
    border-radius: var(--radius);
    overflow: hidden;
    flex-shrink: 0;
    box-shadow: var(--shadow-sm);
}

.post-list .post-thumbnail-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.post-list article.post:hover .post-thumbnail-img {
    transform: scale(1.05);
}

.post-list article.post .post-content {
    flex: 1;
    min-width: 0;
}

/* ============================================
   导航子菜单 (毛玻璃下拉浮板)
   ============================================ */
.menu-items .sub-menu {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    padding: 6px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-6px);
    transition: var(--transition);
    z-index: 1000;
    list-style: none;
}

.menu-items li:hover > .sub-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.menu-items .sub-menu li {
    display: block;
    border-bottom: none !important;
}

.menu-items .sub-menu a {
    display: block;
    padding: 0.5rem 0.85rem;
    color: var(--text) !important;
    white-space: nowrap;
    font-size: 0.85rem !important;
    border-radius: var(--radius-xs);
    background: transparent !important;
}

.menu-items .sub-menu a:hover {
    background: var(--primary-light) !important;
    color: var(--primary) !important;
}

/* ============================================
   分类/标签内联显示
   ============================================ */
.meta-categories-inline a {
    color: var(--primary);
}

.meta-categories-inline a:hover {
    text-decoration: underline;
}

.meta-categories a {
    color: var(--text-secondary);
}

.meta-categories a:hover {
    color: var(--primary);
}

.meta-tags a {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

.meta-tags a:hover {
    color: var(--primary);
}

/* ============================================
   404 页面
   ============================================ */
.error-404 {
    text-align: center;
    padding: var(--space-2xl) 0;
}

.error-404 .error-code {
    font-size: 6rem;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
    margin-bottom: var(--space-md);
}

.error-404 .error-message {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: var(--space-xl);
}

.error-404 .error-search {
    max-width: 400px;
    margin: 0 auto;
}

/* ============================================
   响应式设计与移动端打磨
   ============================================ */
@media (max-width: 1024px) {
    .content-with-sidebar {
        grid-template-columns: 1fr;
    }

    .sidebar {
        position: static;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: var(--space-lg);
    }

    .widget {
        margin-bottom: 0;
    }
}

@media (max-width: 768px) {
    /* 移除触摸高亮 */
    * {
        -webkit-tap-highlight-color: transparent;
    }

    /* iOS 不支持 background-attachment: fixed，移动端改为滚动背景，避免背景图不显示 */
    body {
        background-attachment: scroll;
        background-position: center center;
    }

    .site-wrapper {
        padding: 0 var(--space-md);
    }

    .site-header {
        padding: var(--space-md) 0;
    }

    .header-inner {
        flex-wrap: wrap;
    }

    .header-actions {
        flex: 1;
        justify-content: flex-end;
    }

    .header-desktop-tools {
        display: none;
    }

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

    .site-nav {
        display: none;
    }

    /* 移动菜单：相对 .site-header 绝对定位的悬浮面板（头部 sticky 即包含块），
       层级由头部自身的 z-index:100 决定，高于遮罩层的 99，保证菜单可点、不被压住 */
    .site-nav.mobile-open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        margin-top: var(--space-sm);
        padding: var(--space-md);
        background: var(--bg-card-solid);
        border: 1px solid var(--border);
        border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md);
        max-height: 70vh;
        overflow-y: auto;
    }

    .mobile-menu-close {
        display: flex;
        align-items: center;
        justify-content: center;
        margin-left: auto;
        width: 32px;
        height: 32px;
        border: 1px solid var(--border);
        border-radius: var(--radius-full);
        background: var(--bg-secondary);
        color: var(--text-secondary);
        font-size: 1.1rem;
        line-height: 1;
        cursor: pointer;
    }

    .site-nav.mobile-open .mobile-nav-search {
        display: block;
        margin-bottom: var(--space-md);
    }

    .site-nav.mobile-open .mobile-nav-tools {
        display: block;
    }

    .site-nav.mobile-open .mobile-nav-social {
        display: flex;
        flex-wrap: wrap;
        gap: var(--space-sm);
        margin-top: var(--space-md);
        padding-top: var(--space-md);
        border-top: 1px solid var(--border);
    }

    .menu-items {
        flex-direction: column;
        gap: 0;
    }

    .menu-items li {
        border-bottom: 1px solid var(--border);
    }

    .menu-items li a {
        display: block;
        padding: var(--space-md) 0;
        border-radius: 0;
    }

    .search-field {
        width: 100%;
    }

    .search-form {
        width: 100%;
    }

    .homepage-profile {
        grid-template-columns: 1fr;
        text-align: center;
        padding: var(--space-xl);
    }

    .profile-cover img {
        max-width: 180px;
        margin: 0 auto;
    }

    .profile-details {
        justify-content: center;
    }

    .post-list article.post {
        flex-direction: column;
    }

    .post-list .post-thumbnail {
        width: 100%;
        min-width: unset;
        height: 180px;
        margin-right: 0;
        margin-bottom: var(--space-md);
    }

    article.post {
        padding: var(--space-lg);
    }

    .entry-title {
        font-size: 1.25rem;
    }

    .single article.post {
        padding: var(--space-lg);
    }

    .single .entry-title {
        font-size: 1.55rem;
    }

    .comments-area {
        padding: var(--space-lg);
    }

    .comment {
        padding: var(--space-md);
    }

    .comment-content,
    .reply,
    .comment-awaiting-moderation {
        padding-left: 0;
    }

    .post-navigation {
        grid-template-columns: 1fr;
    }

    .post-nav-next {
        text-align: left;
    }

    .footer-actions-grid {
        grid-template-columns: 1fr;
    }

    .friend-links-grid {
        gap: var(--space-md);
    }

    .friend-card {
        padding: var(--space-md);
    }

    .donate-method {
        padding: var(--space-md) var(--space-sm);
    }

    .footer-links-mini-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }

    .back-to-top {
        bottom: 1rem;
        right: 1rem;
    }

    .reading-mode-toggle {
        bottom: 4.2rem;
        right: 1rem;
    }

    .share-buttons {
        justify-content: center;
    }

    .related-posts-grid {
        grid-template-columns: 1fr;
    }

    .font-size-controls {
        font-size: 0.75rem;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 15px;
    }

    .site-title {
        font-size: 1.125rem;
    }

    .entry-title {
        font-size: 1.15rem;
    }

    .single .entry-title {
        font-size: 1.4rem;
    }

    .footer-links-mini-grid {
        grid-template-columns: repeat(auto-fill, minmax(70px, 1fr));
    }

    .error-404 .error-code {
        font-size: 4rem;
    }
}

/* ============================================
   桌面端大屏优化
   ============================================ */
@media (min-width: 1440px) {
    .site-wrapper {
        max-width: 1360px;
    }
    
    .content-with-sidebar:has(.sidebar) {
        grid-template-columns: minmax(0, 1fr) 340px;
        gap: var(--space-2xl);
    }
    
    body {
        font-size: 16.5px;
    }
    
    .site-title {
        font-size: 1.35rem;
    }
    
    .single .entry-title {
        font-size: 2.35rem;
    }
    
    .single .entry-content {
        font-size: 1.08rem;
        line-height: 1.85;
    }
}

/* ============================================
   打印优化
   ============================================ */
@media print {
    .site-header,
    .site-footer,
    .sidebar,
    .back-to-top,
    .reading-mode-toggle,
    .reading-progress-bar,
    .mobile-menu-toggle,
    .share-buttons,
    .post-navigation,
    .related-posts,
    .comments-area,
    .font-size-controls,
    .toc-container {
        display: none !important;
    }

    body {
        background: #ffffff !important;
        color: #000000 !important;
        font-size: 12pt;
    }

    .site-wrapper {
        max-width: 100% !important;
        padding: 0 !important;
    }

    .content-with-sidebar {
        grid-template-columns: 1fr !important;
    }

    article.post {
        box-shadow: none !important;
        border: none !important;
        padding: 0 !important;
    }

    a {
        color: #000000 !important;
        text-decoration: underline;
    }

    a[href]::after {
        content: " (" attr(href) ")";
        font-size: 0.8em;
    }

    .entry-title {
        font-size: 24pt !important;
    }
}

/* ============================================
   减少动画偏好
   ============================================ */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ============================================
   无障碍：屏幕阅读器文本 / 跳转链接
   ============================================ */
.screen-reader-text {
    position: absolute !important;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    clip-path: inset(50%);
    white-space: nowrap;
    border: 0;
}

.skip-link:focus {
    position: fixed;
    top: 8px;
    left: 8px;
    z-index: 100000;
    width: auto;
    height: auto;
    margin: 0;
    padding: 0.6rem 1rem;
    clip: auto;
    clip-path: none;
    background: var(--primary);
    color: #fff;
    border-radius: var(--radius);
    outline: 2px solid #fff;
    outline-offset: 2px;
}

/* ============================================
   明暗模式切换按钮
   ============================================ */
.theme-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    padding: 0;
    margin-left: var(--space-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    background: var(--bg-card);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--primary);
    border-color: var(--border-hover);
}

.theme-toggle .theme-icon {
    display: none;
}

html.dark-mode .theme-toggle .theme-icon-moon {
    display: block;
}

html:not(.dark-mode) .theme-toggle .theme-icon-sun {
    display: block;
}

/* ============================================
   自建友链页（page-links.php）
   ============================================ */
.friend-links-intro {
    color: var(--text-secondary);
    margin: 0 0 var(--space-lg);
}

.friend-section-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    margin: var(--space-xl) 0 var(--space-md);
}

.friend-section-title::before {
    content: "";
    flex-shrink: 0;
    width: 4px;
    height: 1.05em;
    border-radius: var(--radius-full);
    background: var(--primary);
}

.friend-links-empty {
    color: var(--text-muted);
    font-style: italic;
}

.friend-links-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: var(--space-lg);
    align-items: stretch;
}

.friend-icon-wrap {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    border: 1px solid var(--border);
}

.friend-icon-wrap .friend-icon {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.friend-icon-letter {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    color: #fff;
    font-weight: 600;
    font-size: 1.15rem;
}

.friend-card.is-recent {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary-light), var(--shadow-sm);
}

.friend-apply {
    margin-top: var(--space-2xl);
}

.friend-apply-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-lg);
}

.friend-apply-box {
    background: var(--bg-card);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
}

.friend-apply-box h3 {
    margin: 0 0 var(--space-md);
    font-size: 1rem;
}

.friend-site-info {
    list-style: none;
    padding: 0;
    margin: 0;
}

.friend-site-info li {
    display: flex;
    gap: var(--space-sm);
    padding: var(--space-xs) 0;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.friend-site-info li > span:first-child {
    flex-shrink: 0;
    min-width: 3.5em;
    color: var(--text-muted);
}

.friend-site-info code {
    word-break: break-all;
}

.friend-apply-rules {
    margin: 0;
    padding-left: 1.2em;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.friend-apply-rules li {
    margin-bottom: var(--space-xs);
}

.friend-apply-contact {
    margin-top: var(--space-md);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* ============================================
   移动端细节：安全区与触控热区
   ============================================ */
.back-to-top {
    bottom: calc(2rem + env(safe-area-inset-bottom, 0px));
    right: calc(2rem + env(safe-area-inset-right, 0px));
}

.site-header {
    padding-left: env(safe-area-inset-left, 0px);
    padding-right: env(safe-area-inset-right, 0px);
}

.mobile-menu-close {
    width: 40px;
    height: 40px;
    font-size: 1.35rem;
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: calc(1rem + env(safe-area-inset-bottom, 0px));
        right: calc(1rem + env(safe-area-inset-right, 0px));
    }
}