/* ========================================
   墨影闲谈 - 主样式
   设计理念：现代玻璃效果 + 中国风点缀
   ======================================== */

/* ===== CSS 变量 ===== */
:root {
    /* 默认深色主题 */
    --color-primary: #8AAAFF;
    --color-primary-dark: #6C8EF5;
    --color-accent: #E74C3C;
    --color-accent-light: #F07070;
    --color-bg: #1A1A1F;
    --color-bg-alt: #222228;
    --color-text: #E0E0E0;
    --color-text-secondary: #AAAAAA;
    --color-text-muted: #777777;
    --color-white: #FFFFFF;
    --color-border: rgba(231, 76, 60, 0.2);

    /* 深色玻璃效果 */
    --glass-bg: rgba(30, 30, 40, 0.55);
    --glass-bg-hover: rgba(40, 40, 55, 0.65);
    --glass-bg-solid: transparent;
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: 12px;
    --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.25);
    --glass-shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.40);

    /* 字体 */
    --font-brand: 'ZCOOL XiaoWei', 'STKaiti', 'KaiTi', serif;
    --font-heading: 'Noto Serif SC', 'Source Han Serif SC', 'STSong', 'SimSun', serif;
    --font-body: 'Noto Sans SC', 'Source Han Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    --font-mono: 'JetBrains Mono', 'Cascadia Code', 'Fira Code', 'Consolas', monospace;

    /* 间距 */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;

    /* 圆角 */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* 布局 - 百分比方式，响应式 */
    --content-max-pct: 88%;
    --sidebar-width: 240px;
    --header-height: 64px;

    /* 过渡 */
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 浅色主题变量覆盖 ===== */
[data-theme="light"] {
    --color-primary: #6C8EF5;
    --color-primary-dark: #4A6FD8;
    --color-accent: #C0392B;
    --color-accent-light: #E74C3C;
    --color-bg: #F5F0EB;
    --color-bg-alt: #EDE7DF;
    --color-text: #2C2C2C;
    --color-text-secondary: #666666;
    --color-text-muted: #999999;
    --color-border: rgba(192, 57, 43, 0.15);

    --glass-bg: rgba(255, 255, 255, 0.35);
    --glass-bg-hover: rgba(255, 255, 255, 0.50);
    --glass-bg-solid: transparent;
    --glass-border: rgba(255, 255, 255, 0.5);
    --glass-blur: 12px;
    --glass-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
    --glass-shadow-hover: 0 8px 32px rgba(0, 0, 0, 0.10);
}

/* ===== 全局重置 ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-bg);
    line-height: 1.75;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    /* 默认深色背景 */
    background-image:
        radial-gradient(ellipse at 20% 15%, rgba(108, 142, 245, 0.08) 0%, transparent 55%),
        radial-gradient(ellipse at 75% 10%, rgba(231, 76, 60, 0.06) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 70%, rgba(108, 142, 245, 0.05) 0%, transparent 50%),
        radial-gradient(ellipse at 25% 80%, rgba(180, 140, 200, 0.06) 0%, transparent 55%),
        radial-gradient(ellipse at 85% 55%, rgba(140, 180, 220, 0.05) 0%, transparent 55%),
        radial-gradient(ellipse at 45% 40%, rgba(200, 170, 150, 0.04) 0%, transparent 60%),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 3px,
            rgba(255, 255, 255, 0.008) 3px,
            rgba(255, 255, 255, 0.008) 4px
        );
}

/* 浅色主题背景 */
[data-theme="light"] body {
    background-image:
        radial-gradient(ellipse at 20% 15%, rgba(108, 142, 245, 0.12) 0%, transparent 55%),
        radial-gradient(ellipse at 75% 10%, rgba(192, 57, 43, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 60% 70%, rgba(108, 142, 245, 0.07) 0%, transparent 50%),
        radial-gradient(ellipse at 25% 80%, rgba(180, 140, 200, 0.10) 0%, transparent 55%),
        radial-gradient(ellipse at 85% 55%, rgba(140, 180, 220, 0.09) 0%, transparent 55%),
        radial-gradient(ellipse at 45% 40%, rgba(200, 170, 150, 0.07) 0%, transparent 60%),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 3px,
            rgba(0, 0, 0, 0.008) 3px,
            rgba(0, 0, 0, 0.008) 4px
        );
}

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

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

/* ===== 导航栏 - 玻璃效果 ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid transparent;
    height: var(--header-height);
    transition: background var(--transition-slow), border-color var(--transition-slow), box-shadow var(--transition-slow);
}

/* 导航栏玻璃效果 - 用 ::before 伪元素避免影响子元素的 backdrop-filter */
.site-header::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--glass-bg-solid);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: -1;
}

.site-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg,
        transparent 0%,
        var(--color-accent) 15%,
        var(--color-accent) 85%,
        transparent 100%
    );
    opacity: 0.4;
}

.header-inner {
    max-width: var(--content-max-pct);
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* 品牌 */
.site-brand {
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: var(--color-text);
}
.brand-title {
    font-family: var(--font-brand);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.3;
    letter-spacing: 2px;
}
.brand-desc {
    font-size: 0.72rem;
    color: var(--color-text-muted);
    line-height: 1;
}

/* 导航 */
.site-nav {
    display: flex;
    align-items: center;
}

.nav-list {
    list-style: none;
    display: flex;
    align-items: center;
    gap: 4px;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    display: flex;
    align-items: center;
    gap: 3px;
    padding: 8px 12px;
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
    white-space: nowrap;
}
.nav-item > a:hover {
    color: var(--color-text);
    background: var(--glass-bg);
}
.nav-item.active > a {
    color: var(--color-accent);
    font-weight: 600;
}
.nav-arrow {
    font-size: 0.65rem;
    transition: transform var(--transition);
}

/* 子导航 - 玻璃效果（独立堆叠上下文 + backdrop-filter） */
.sub-nav {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 160px;
    background: var(--glass-bg-solid);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    isolation: isolate;
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    padding: var(--spacing-sm) 0;
    list-style: none;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition);
    z-index: 1001;
}

.nav-item.has-sub:hover .sub-nav,
.nav-item.has-sub:focus-within .sub-nav {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.nav-item.has-sub:hover .nav-arrow {
    transform: rotate(180deg);
}

.sub-nav li a {
    display: block;
    padding: 6px 16px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    transition: all var(--transition);
}
.sub-nav li a:hover {
    color: var(--color-accent);
    background: var(--color-border);
}

/* 移动端导航切换 */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
    z-index: 1002;
}
.nav-toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

/* 主题切换按钮 */
.theme-toggle-item {
    margin-left: 8px;
}
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: none;
    border: 1px solid var(--glass-border);
    border-radius: 50%;
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all var(--transition);
}
.theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
    background: var(--glass-bg);
}

/* 默认显示深色图标（当前为深色主题时显示太阳=切浅色） */
.theme-icon-light { display: none; }
.theme-icon-dark { display: block; }

/* 浅色主题下显示月亮图标（切深色） */
[data-theme="light"] .theme-icon-light { display: block; }
[data-theme="light"] .theme-icon-dark { display: none; }

/* ===== 主内容区域 ===== */
.main-content {
    flex: 1;
    max-width: var(--content-max-pct);
    width: 100%;
    margin: 0 auto;
    padding: 0 var(--spacing-lg) var(--spacing-2xl);
}

/* ===== Hero 区域 ===== */
.hero-section {
    text-align: center;
    padding: var(--spacing-2xl) 0;
    position: relative;
    border-radius: 0 0 var(--radius-xl) var(--radius-xl);
    margin-bottom: var(--spacing-md);
}
.hero-section::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--color-accent);
    margin: var(--spacing-xl) auto 0;
    border-radius: 2px;
    opacity: 0.4;
}
.hero-title {
    font-family: var(--font-brand);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 6px;
    margin-bottom: var(--spacing-sm);
}
.hero-desc {
    font-size: 1rem;
    color: var(--color-text-secondary);
    letter-spacing: 1px;
}

/* ===== 玻璃卡片 ===== */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    box-shadow: var(--glass-shadow);
    transition: all var(--transition);
}
.glass-card:hover {
    background: var(--glass-bg-hover);
    box-shadow: var(--glass-shadow-hover);
    transform: translateY(-2px);
}

/* ===== 文章列表 ===== */
.post-list-container {
    padding-top: var(--spacing-md);
}
.post-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.post-card {
    overflow: hidden;
}
.post-card-link {
    display: block;
    padding: var(--spacing-lg);
    color: var(--color-text);
    text-decoration: none;
}
.post-card-link:hover {
    color: var(--color-text);
}
.post-card-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    line-height: 1.5;
    color: var(--color-text);
    transition: color var(--transition);
}
.post-card-link:hover .post-card-title {
    color: var(--color-accent);
}
.post-card-excerpt {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.post-card-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}
.post-card-date {
    display: flex;
    align-items: center;
    gap: 4px;
}
.post-card-cats {
    display: flex;
    gap: 6px;
}
.cat-tag {
    display: inline-block;
    padding: 1px 8px;
    background: rgba(108, 142, 245, 0.15);
    border-radius: 10px;
    font-size: 0.75rem;
    color: var(--color-primary);
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
}
.page-btn {
    display: inline-flex;
    align-items: center;
    padding: 8px 20px;
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    transition: all var(--transition);
}
.page-btn:hover {
    color: var(--color-accent);
    background: var(--color-border);
    border-color: var(--color-accent);
}
.page-info {
    font-size: 0.9rem;
    color: var(--color-text-muted);
}

/* ===== 文章页 ===== */
.post-container {
    max-width: var(--content-max-pct);
    width: 100%;
    margin: 0 auto;
}

/* 文章头 */
.post-header {
    text-align: center;
    padding-bottom: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    position: relative;
}
.post-header::after {
    display: none;
}
.post-title {
    font-family: var(--font-heading);
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
}
.post-meta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
}
.meta-item {
    display: flex;
    align-items: center;
    gap: 5px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}
.post-categories,
.post-tags {
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}
.cat-link {
    display: inline-block;
    padding: 3px 12px;
    background: rgba(108, 142, 245, 0.15);
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--color-primary);
    transition: all var(--transition);
}
.cat-link:hover {
    background: var(--color-primary);
    color: var(--color-white);
}
.tag-link {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(255, 255, 255, 0.06);
    border-radius: 12px;
    font-size: 0.78rem;
    color: var(--color-text-secondary);
    transition: all var(--transition);
}
.tag-link:hover {
    background: var(--color-accent);
    color: var(--color-white);
}

/* 文章内容 + 侧边栏 */
.post-body-wrapper {
    display: flex;
    gap: var(--spacing-xl);
    align-items: flex-start;
}
.post-content {
    flex: 1;
    min-width: 0;
}
.post-sidebar {
    width: var(--sidebar-width);
    flex-shrink: 0;
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    position: sticky;
    top: calc(var(--header-height) + var(--spacing-lg));
}

/* 侧边栏 */
.sidebar-section {
    margin-bottom: var(--spacing-lg);
}
.sidebar-section:last-child {
    margin-bottom: 0;
}
.sidebar-title {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}
.sidebar-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* TOC 目录 */
.toc {
    font-size: 0.82rem;
    line-height: 1.8;
}
.toc a {
    display: block;
    padding: 2px 0;
    color: var(--color-text-secondary);
    transition: all var(--transition);
    border-left: 2px solid transparent;
    padding-left: var(--spacing-sm);
}
.toc a:hover,
.toc a.active {
    color: var(--color-accent);
    border-left-color: var(--color-accent);
}
.toc a.toc-h3 {
    padding-left: var(--spacing-lg);
    font-size: 0.78rem;
}

/* 文章正文排版 */
.post-content {
    font-size: 1.02rem;
    line-height: 1.9;
    color: var(--color-text);
}
.post-content h1,
.post-content h2,
.post-content h3,
.post-content h4,
.post-content h5,
.post-content h6 {
    font-family: var(--font-heading);
    color: var(--color-text);
    margin: var(--spacing-xl) 0 var(--spacing-md);
    line-height: 1.4;
    scroll-margin-top: calc(var(--header-height) + 20px);
}
.post-content h2 {
    font-size: 1.4rem;
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}
.post-content h3 {
    font-size: 1.2rem;
}
.post-content p {
    margin-bottom: var(--spacing-md);
}
.post-content ul,
.post-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}
.post-content li {
    margin-bottom: var(--spacing-xs);
}
.post-content blockquote {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md) var(--spacing-lg);
    border-left: 3px solid var(--color-accent);
    background: var(--color-border);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--color-text-secondary);
}
.post-content blockquote p:last-child {
    margin-bottom: 0;
}
.post-content hr {
    margin: var(--spacing-xl) 0;
    border: none;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-border), transparent);
}

/* 代码 */
.post-content code {
    font-family: var(--font-mono);
    font-size: 0.88em;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    color: var(--color-accent-light);
}
.post-content pre {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow-x: auto;
    font-size: 0.88rem;
    line-height: 1.6;
}
.post-content pre code {
    background: none;
    padding: 0;
    color: var(--color-text);
    font-size: inherit;
}

/* 表格 */
.post-content table {
    width: 100%;
    margin: var(--spacing-md) 0;
    border-collapse: collapse;
    font-size: 0.9rem;
}
.post-content th,
.post-content td {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    text-align: left;
}
.post-content th {
    background: rgba(108, 142, 245, 0.12);
    font-weight: 600;
}

/* 图片 */
.post-content img {
    border-radius: var(--radius-sm);
    display: block;
    margin: var(--spacing-md) auto;
}

/* 文章尾部 */
.post-footer {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}
.post-copyright {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius-sm);
}
.post-copyright p {
    margin-bottom: 4px;
}
.post-wechat {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    padding: var(--spacing-md);
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}
.wechat-qr {
    width: 140px;
    border-radius: var(--radius-sm);
    margin-top: var(--spacing-sm);
}

/* ===== 页面 ===== */
.page-container {
    max-width: var(--content-max-pct);
    width: 100%;
    margin: 0 auto;
}
.page-header {
    text-align: center;
    padding-bottom: var(--spacing-lg);
    margin-bottom: var(--spacing-xl);
    position: relative;
}
.page-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 40px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
    opacity: 0.3;
}
.page-title {
    font-family: var(--font-heading);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--color-text);
}
.page-content {
    padding: var(--spacing-xl);
    font-size: 1rem;
    line-height: 1.9;
}
/* 无玻璃卡片包裹的页面内容，减少左右 padding */
.page-content:not(.glass-card) {
    padding: var(--spacing-md) 0;
}
.page-content h2 {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    margin: var(--spacing-xl) 0 var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}
.page-content h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin: var(--spacing-lg) 0 var(--spacing-sm);
}
.page-content p {
    margin-bottom: var(--spacing-md);
}
.page-content ul,
.page-content ol {
    margin-bottom: var(--spacing-md);
    padding-left: var(--spacing-xl);
}
.page-content code {
    font-family: var(--font-mono);
    font-size: 0.9em;
    padding: 2px 6px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
}
.page-content pre {
    margin: var(--spacing-md) 0;
    padding: var(--spacing-md);
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    overflow-x: auto;
}
.page-content pre code {
    background: none;
    padding: 0;
}
.page-content img {
    border-radius: var(--radius-sm);
    display: block;
    margin: var(--spacing-md) auto;
}

/* Wiki 内容 */
.wiki-content {
    font-size: 1rem;
    line-height: 1.9;
}

/* ===== 分类页 ===== */
.category-index,
.category-page {
    width: 100%;
}
.category-index p {
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
}
.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}
.category-card {
    padding: var(--spacing-lg);
}
.category-card h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--color-border);
}
.category-card h3 a {
    color: var(--color-text);
}
.category-card h3 a:hover {
    color: var(--color-accent);
}
.category-card ul {
    list-style: none;
    padding: 0;
}
.category-card ul li {
    margin-bottom: 6px;
}
.category-card ul li a {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    display: block;
    padding: 4px 0;
    transition: all var(--transition);
}
.category-card ul li a:hover {
    color: var(--color-accent);
    padding-left: 6px;
}

/* 二级分类子分类网格 */
.section-heading {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}
.subcategory-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}
.subcategory-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    text-decoration: none;
    color: var(--color-text);
}
.subcat-name {
    font-size: 1rem;
    font-weight: 500;
}
.subcat-arrow {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    transition: transform var(--transition);
}
.subcategory-card:hover .subcat-arrow {
    transform: translateX(4px);
}

/* 分类页 - 当前分类标题 */
.category-page {
    max-width: var(--max-width);
    margin: 0 auto;
}
.category-page-header {
    text-align: center;
    margin-top: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
}
.category-page-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
}
.category-page-sub {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-top: var(--spacing-xs);
}

/* 标签页分组标题 */
.tag-section-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--color-text);
    margin: var(--spacing-xl) 0 var(--spacing-md);
    padding-bottom: var(--spacing-xs);
    border-bottom: 1px solid var(--color-border);
}

/* 空状态 */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
    font-size: 1rem;
}

/* ===== 页脚 ===== */
.site-footer {
    margin-top: var(--spacing-2xl);
    padding: var(--spacing-xl) var(--spacing-lg);
    background: rgba(44, 44, 44, 0.95);
    color: rgba(255, 255, 255, 0.7);
}
.footer-inner {
    max-width: var(--content-max-pct);
    width: 100%;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}
.footer-social {
    display: flex;
    gap: var(--spacing-lg);
}
.social-link {
    color: rgba(255, 255, 255, 0.55);
    transition: color var(--transition);
    display: flex;
    align-items: center;
}
.social-link:hover {
    color: rgba(255, 255, 255, 0.9);
}
.footer-copy {
    font-size: 0.82rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}
.footer-copy a {
    color: rgba(255, 255, 255, 0.6);
}
.footer-copy a:hover {
    color: rgba(255, 255, 255, 0.9);
}
.footer-sep {
    color: rgba(255, 255, 255, 0.2);
}

/* ===== 回到顶部 ===== */
.scroll-top {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    box-shadow: var(--glass-shadow);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all var(--transition);
    z-index: 999;
    color: var(--color-text-secondary);
}
.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.scroll-top:hover {
    color: var(--color-accent);
    background: var(--color-border);
    border-color: var(--color-accent);
}

/* ===== Gitalk ===== */
#gitalk-container {
    margin-top: var(--spacing-xl);
    padding: var(--spacing-lg);
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .post-body-wrapper {
        flex-direction: column;
    }
    .post-sidebar {
        width: 100%;
        position: static;
        order: -1;
        margin-bottom: var(--spacing-lg);
        padding: var(--spacing-md);
    }
    .post-content {
        max-width: 100%;
    }
    .post-container {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    :root {
        --header-height: 56px;
        --content-max-pct: 96%;
    }

    .main-content {
        padding: 0 var(--spacing-sm) var(--spacing-xl);
    }

    .hero-title {
        font-size: 2rem;
        letter-spacing: 3px;
    }
    .hero-desc {
        font-size: 0.9rem;
    }

    .post-card-link {
        padding: var(--spacing-md);
    }

    .page-content {
        padding: var(--spacing-md);
    }

    /* 移动端导航 */
    .nav-toggle {
        display: flex;
    }

    .site-nav {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--glass-bg-solid);
        backdrop-filter: blur(4px);
        -webkit-backdrop-filter: blur(4px);
        isolation: isolate;
        padding: calc(var(--header-height) + var(--spacing-lg)) var(--spacing-lg) var(--spacing-lg);
        transition: right var(--transition-slow);
        box-shadow: var(--glass-shadow-hover);
        z-index: 1001;
    }
    .site-nav.open {
        right: 0;
    }

    .nav-list {
        flex-direction: column;
        align-items: flex-start;
        gap: 0;
    }
    .nav-item {
        width: 100%;
    }
    .nav-item > a {
        padding: 10px 12px;
        width: 100%;
        font-size: 1rem;
        border-bottom: 1px solid var(--glass-border);
    }
    .theme-toggle-item {
        margin-left: 0;
        margin-top: var(--spacing-sm);
    }

    .sub-nav {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        background: none;
        backdrop-filter: none;
        -webkit-backdrop-filter: none;
        border: none;
        box-shadow: none;
        padding: 0 0 0 var(--spacing-lg);
        display: none;
    }
    .nav-item.has-sub.open .sub-nav {
        display: block;
    }
    .sub-nav li a {
        padding: 8px 0;
    }

    .post-title {
        font-size: 1.4rem;
    }
    .post-content {
        font-size: 0.96rem;
    }
    .post-meta {
        gap: var(--spacing-md);
    }

    .category-grid,
    .subcategory-grid {
        grid-template-columns: 1fr;
    }
    .scroll-top {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
        width: 36px;
        height: 36px;
    }
}

@media (max-width: 480px) {
    :root {
        --content-max-pct: 98%;
    }

    .main-content {
        padding: var(--spacing-md) var(--spacing-xs) var(--spacing-lg);
    }

    .hero-section {
        padding: var(--spacing-xl) 0;
    }
    .hero-title {
        font-size: 1.6rem;
        letter-spacing: 2px;
    }
    .pagination {
        flex-direction: column;
        gap: var(--spacing-sm);
    }

    .post-card-link {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .page-content {
        padding: var(--spacing-md) var(--spacing-sm);
    }
}