/**
 * Nanobot Blog 主样式表
 * 深色优先 · 系统无衬线字体 · 响应式 · 手写原生 CSS
 *
 * @package Nanobot_Blog
 * @version 1.0.0
 */

/* =============================================================
   0. 主题变量（深色优先 + 跟随系统浅色切换）
   ============================================================= */
:root {
	/* 主色渐变（可在自定义器中覆盖） */
	--nb-accent-primary: #667EEA;
	--nb-accent-secondary: #764BA2;
	--nb-accent-gradient: linear-gradient(135deg, #667EEA 0%, #764BA2 100%);
	--nb-accent: #667EEA;

	/* 深色模式色板（默认） */
	--nb-bg: #17191f;
	--nb-bg-alt: #21242c;
	--nb-bg-elev: #262932;
	--nb-bg-card: #1f222a;
	--nb-bg-code: #111317;
	--nb-border: #2e313b;
	--nb-border-soft: #2a2d36;
	--nb-text: #e7eaf0;
	--nb-text-soft: #b7bcc8;
	--nb-text-muted: #7c8190;
	--nb-text-link: var(--nb-accent-primary);
	--nb-text-link-hover: #8fa3ff;
	--nb-tag-bg: rgba(102, 126, 234, 0.12);
	--nb-tag-text: #a5b4ff;
	--nb-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
	--nb-shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.18);

	/* 尺寸与圆角 */
	--nb-radius: 14px;
	--nb-radius-sm: 10px;
	--nb-radius-lg: 16px;
	--nb-max-width: 1200px;
	--nb-content-width: 760px;
	--nb-sidebar-width: 300px;
	--nb-gap: 32px;

	/* 字体 */
	--nb-font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
		"Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
	--nb-font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas,
		"Liberation Mono", "Courier New", monospace;

	--nb-transition: 0.2s ease;
}

/* 浅色模式（跟随系统优先） */
@media (prefers-color-scheme: light) {
	:root:not([data-theme="dark"]) {
		--nb-bg: #f6f7fb;
		--nb-bg-alt: #ffffff;
		--nb-bg-elev: #ffffff;
		--nb-bg-card: #ffffff;
		--nb-bg-code: #f3f4f8;
		--nb-border: #e3e6ee;
		--nb-border-soft: #eaecef;
		--nb-text: #1f2330;
		--nb-text-soft: #4a5165;
		--nb-text-muted: #878da0;
		--nb-text-link: var(--nb-accent-primary);
		--nb-text-link-hover: #5562c4;
		--nb-tag-bg: rgba(102, 126, 234, 0.12);
		--nb-tag-text: #5866c4;
		--nb-shadow: 0 8px 30px rgba(60, 70, 110, 0.10);
		--nb-shadow-soft: 0 2px 8px rgba(60, 70, 110, 0.06);
	}
}

/* 用户主动选择浅色模式 */
:root[data-theme="light"] {
	--nb-bg: #f6f7fb;
	--nb-bg-alt: #ffffff;
	--nb-bg-elev: #ffffff;
	--nb-bg-card: #ffffff;
	--nb-bg-code: #f3f4f8;
	--nb-border: #e3e6ee;
	--nb-border-soft: #eaecef;
	--nb-text: #1f2330;
	--nb-text-soft: #4a5165;
	--nb-text-muted: #878da0;
	--nb-text-link: var(--nb-accent-primary);
	--nb-text-link-hover: #5562c4;
	--nb-tag-bg: rgba(102, 126, 234, 0.12);
	--nb-tag-text: #5866c4;
	--nb-shadow: 0 8px 30px rgba(60, 70, 110, 0.10);
	--nb-shadow-soft: 0 2px 8px rgba(60, 70, 110, 0.06);
}

/* 用户主动选择深色模式：强制深色（覆盖浅色系统） */
:root[data-theme="dark"] {
	--nb-bg: #17191f;
	--nb-bg-alt: #21242c;
	--nb-bg-elev: #262932;
	--nb-bg-card: #1f222a;
	--nb-bg-code: #111317;
	--nb-border: #2e313b;
	--nb-border-soft: #2a2d36;
	--nb-text: #e7eaf0;
	--nb-text-soft: #b7bcc8;
	--nb-text-muted: #7c8190;
	--nb-text-link: var(--nb-accent-primary);
	--nb-text-link-hover: #8fa3ff;
	--nb-tag-bg: rgba(102, 126, 234, 0.12);
	--nb-tag-text: #a5b4ff;
	--nb-shadow: 0 8px 30px rgba(0, 0, 0, 0.28);
	--nb-shadow-soft: 0 2px 8px rgba(0, 0, 0, 0.18);
}

/* =============================================================
   1. 重置与基础排版
   ============================================================= */
*, *::before, *::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }

body {
	margin: 0;
	padding: 0;
	background: var(--nb-bg);
	color: var(--nb-text);
	font-family: var(--nb-font);
	font-size: 16px;
	line-height: 1.7;
	-webkit-font-smoothing: antialiased;
	-moz-osx-font-smoothing: grayscale;
	text-rendering: optimizeLegibility;
	word-break: break-word;
	overflow-wrap: break-word;
	transition: background-color var(--nb-transition), color var(--nb-transition);
}

img, svg, video, iframe { max-width: 100%; height: auto; }
img { border-style: none; vertical-align: middle; }

a { color: var(--nb-text-link); text-decoration: none; transition: color var(--nb-transition); }
a:hover { color: var(--nb-text-link-hover); }

h1, h2, h3, h4, h5, h6 {
	margin: 1.4em 0 0.6em;
	font-weight: 700;
	line-height: 1.35;
	color: var(--nb-text);
}
h1 { font-size: 1.9em; }
h2 { font-size: 1.55em; }
h3 { font-size: 1.3em; }
h4 { font-size: 1.12em; }
h5, h6 { font-size: 1em; }

p { margin: 0 0 1.2em; }

ul, ol { margin: 0 0 1.2em; padding-left: 1.5em; }
li { margin: 0.3em 0; }

blockquote {
	margin: 1.4em 0;
	padding: 0.6em 1.2em;
	border-left: 3px solid var(--nb-accent);
	background: var(--nb-bg-alt);
	border-radius: 0 var(--nb-radius-sm) var(--nb-radius-sm) 0;
	color: var(--nb-text-soft);
}
blockquote p:last-child { margin-bottom: 0; }

hr { border: none; border-top: 1px solid var(--nb-border); margin: 2em 0; }

table { width: 100%; border-collapse: collapse; margin: 1.4em 0; }
th, td { padding: 10px 14px; border: 1px solid var(--nb-border); text-align: left; }
th { background: var(--nb-bg-alt); font-weight: 700; }

/* 屏幕阅读器辅助 */
.screen-reader-text {
	border: 0; clip: rect(1px, 1px, 1px, 1px);
	clip-path: inset(50%);
	height: 1px; overflow: hidden;
	padding: 0; position: absolute !important;
	width: 1px; word-wrap: normal !important;
}
.screen-reader-text:focus {
	clip: auto !important; clip-path: none;
	background: var(--nb-bg-elev);
	color: var(--nb-text);
	display: block;
	font-size: 14px; font-weight: 700;
	height: auto; left: 8px; top: 8px;
	padding: 12px 16px; width: auto;
	z-index: 100000;
	border-radius: var(--nb-radius-sm);
}

.skip-link {
	position: absolute; left: -9999em;
}
.skip-link:focus {
	position: fixed; top: 8px; left: 8px; z-index: 9999;
	padding: 10px 16px; background: var(--nb-accent); color: #fff;
	border-radius: var(--nb-radius-sm);
}

/* =============================================================
   2. 布局容器
   ============================================================= */
.site { min-height: 100vh; display: flex; flex-direction: column; }

.site-content {
	flex: 1 0 auto;
	width: 100%;
	max-width: var(--nb-max-width);
	margin: 0 auto;
	padding: 32px 20px;
}

.site-main { width: 100%; }

.content-grid {
	display: grid;
	grid-template-columns: minmax(0, 1fr) var(--nb-sidebar-width);
	gap: var(--nb-gap);
	align-items: start;
}

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

.widget-area {
	position: sticky;
	top: 88px;
	align-self: start;
}

/* =============================================================
   3. 顶部导航
   ============================================================= */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: rgba(23, 25, 31, 0.86);
	backdrop-filter: saturate(160%) blur(14px);
	-webkit-backdrop-filter: saturate(160%) blur(14px);
	border-bottom: 1px solid var(--nb-border-soft);
}

:root[data-theme="light"] .site-header,
:root:not([data-theme="dark"]) .site-header {
	background: rgba(255, 255, 255, 0.86);
}

@media (prefers-color-scheme: light) {
	:root:not([data-theme="dark"]) .site-header {
		background: rgba(255, 255, 255, 0.86);
	}
}

.site-header-inner {
	max-width: var(--nb-max-width);
	margin: 0 auto;
	padding: 0 20px;
	height: 64px;
	display: flex;
	align-items: center;
	gap: 20px;
}

.site-branding { display: flex; align-items: center; flex-shrink: 0; }

.site-logo-text {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	color: var(--nb-text);
	font-weight: 700;
	font-size: 17px;
}

.site-logo-mark {
	width: 30px; height: 30px;
	display: inline-flex;
	align-items: center; justify-content: center;
	background: var(--nb-accent-gradient);
	color: #fff;
	border-radius: 9px;
	font-weight: 800;
	font-size: 16px;
	box-shadow: 0 4px 12px rgba(102, 126, 234, 0.36);
}

.custom-logo-link img { max-height: 40px; width: auto; display: block; }

/* 主菜单 */
.main-navigation { flex: 1 1 auto; }
.main-navigation .nav-menu {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 4px;
	list-style: none;
	margin: 0;
	padding: 0;
}
.main-navigation .menu-item a {
	display: block;
	padding: 8px 14px;
	color: var(--nb-text-soft);
	border-radius: var(--nb-radius-sm);
	font-size: 14.5px;
	font-weight: 500;
}
.main-navigation .menu-item a:hover,
.main-navigation .menu-item.current-menu-item > a {
	color: var(--nb-text);
	background: var(--nb-bg-alt);
}

.menu-item-ai-log > a::before { content: "🤖 "; }

/* 站点操作按钮 */
.site-actions { display: flex; align-items: center; gap: 6px; flex-shrink: 0; }

.search-toggle,
.theme-toggle {
	width: 38px; height: 38px;
	display: inline-flex;
	align-items: center; justify-content: center;
	background: transparent;
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius-sm);
	color: var(--nb-text-soft);
	cursor: pointer;
	font-size: 16px;
	transition: all var(--nb-transition);
}
.search-toggle:hover,
.theme-toggle:hover {
	color: var(--nb-text);
	border-color: var(--nb-accent);
	background: var(--nb-bg-alt);
}

.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: inline; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: inline; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }
@media (prefers-color-scheme: light) {
	:root:not([data-theme="dark"]) .theme-toggle .icon-sun { display: inline; }
	:root:not([data-theme="dark"]) .theme-toggle .icon-moon { display: none; }
}

/* 移动端菜单按钮 */
.menu-toggle {
	display: none;
	width: 38px; height: 38px;
	background: transparent;
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius-sm);
	cursor: pointer;
	position: relative;
}
.menu-toggle-icon,
.menu-toggle-icon::before,
.menu-toggle-icon::after {
	content: ""; display: block;
	width: 18px; height: 2px;
	background: var(--nb-text);
	margin: 0 auto;
	transition: transform var(--nb-transition);
}
.menu-toggle-icon { position: relative; top: 0; }
.menu-toggle-icon::before { position: absolute; top: -6px; left: 0; }
.menu-toggle-icon::after { position: absolute; top: 6px; left: 0; }

.menu-toggle[aria-expanded="true"] .menu-toggle-icon { background: transparent; }
.menu-toggle[aria-expanded="true"] .menu-toggle-icon::before { transform: translateY(6px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] .menu-toggle-icon::after { transform: translateY(-6px) rotate(-45deg); }

/* 搜索浮层 */
.search-overlay {
	position: absolute;
	top: 100%; left: 0; right: 0;
	background: var(--nb-bg-alt);
	border-bottom: 1px solid var(--nb-border);
	padding: 16px 20px;
	box-shadow: var(--nb-shadow);
}
.search-overlay[hidden] { display: none; }
.search-overlay .search-form {
	max-width: 640px; margin: 0 auto;
	display: flex; align-items: center; gap: 8px;
}
.search-overlay .search-field {
	flex: 1;
	padding: 10px 14px;
	background: var(--nb-bg);
	border: 1px solid var(--nb-border);
	border-radius: var(--nb-radius-sm);
	color: var(--nb-text);
	font-size: 15px;
}
.search-overlay .search-submit {
	padding: 10px 20px;
	background: var(--nb-accent-gradient);
	color: #fff;
	border: none;
	border-radius: var(--nb-radius-sm);
	font-weight: 600;
	cursor: pointer;
}
.search-overlay .search-close {
	background: transparent;
	border: none;
	color: var(--nb-text-soft);
	font-size: 22px;
	cursor: pointer;
	line-height: 1;
	padding: 4px 8px;
}

/* =============================================================
   4. Hero 区
   ============================================================= */
.hero-section {
	padding: 36px 0 28px;
	border-bottom: 1px solid var(--nb-border-soft);
	margin-bottom: 28px;
}
.hero-inner { text-align: center; }
.hero-title {
	font-size: 2.1em;
	margin: 0 0 8px;
	background: var(--nb-accent-gradient);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
	color: transparent;
}
.hero-desc { color: var(--nb-text-soft); margin: 0 auto 22px; max-width: 640px; }

.hero-cats {
	display: flex; flex-wrap: wrap;
	justify-content: center; gap: 10px;
}
.hero-cat {
	display: inline-flex; align-items: center; gap: 8px;
	padding: 8px 16px;
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: 999px;
	color: var(--nb-text-soft);
	font-size: 14px;
	transition: all var(--nb-transition);
}
.hero-cat:hover {
	color: var(--nb-text);
	border-color: var(--nb-accent);
	transform: translateY(-2px);
	box-shadow: var(--nb-shadow-soft);
}
.hero-cat .hero-cat-count {
	background: var(--nb-bg-alt);
	padding: 1px 8px;
	border-radius: 999px;
	font-size: 12px;
	color: var(--nb-text-muted);
}
.hero-cat.cat-badge-ai-log {
	background: var(--nb-accent-gradient);
	color: #fff;
	border-color: transparent;
}
.hero-cat.cat-badge-ai-log .hero-cat-count { background: rgba(255, 255, 255, 0.22); color: #fff; }

/* =============================================================
   5. 文章卡片列表
   ============================================================= */
.page-header { margin-bottom: 24px; }
.page-title { font-size: 1.5em; margin: 0 0 8px; }

.post-card-list {
	display: grid;
	grid-template-columns: repeat(2, minmax(0, 1fr));
	gap: 20px;
}

.post-card {
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
	overflow: hidden;
	display: flex;
	flex-direction: column;
	transition: transform var(--nb-transition), box-shadow var(--nb-transition), border-color var(--nb-transition);
}
.post-card:hover {
	transform: translateY(-3px);
	box-shadow: var(--nb-shadow);
	border-color: var(--nb-accent);
}

.post-card-thumb {
	display: block;
	width: 100%;
	aspect-ratio: 16 / 9;
	overflow: hidden;
	background: var(--nb-bg-alt);
}
.post-card-thumb img {
	width: 100%; height: 100%;
	object-fit: cover;
	transition: transform 0.4s ease;
}
.post-card:hover .post-card-thumb img { transform: scale(1.04); }

.post-card-body {
	padding: 18px 18px 16px;
	display: flex; flex-direction: column;
	flex: 1;
}
.post-card-meta {
	display: flex; align-items: center; gap: 8px;
	flex-wrap: wrap;
	margin-bottom: 10px;
}
.post-card .post-cat {
	display: inline-block;
	padding: 2px 10px;
	background: var(--nb-tag-bg);
	color: var(--nb-tag-text);
	font-size: 12px;
	font-weight: 600;
	border-radius: 999px;
}
.post-card-time {
	font-size: 12.5px;
	color: var(--nb-text-muted);
}

.post-card-title {
	font-size: 1.18em;
	margin: 0 0 8px;
	line-height: 1.4;
}
.post-card-title a { color: var(--nb-text); }
.post-card-title a:hover { color: var(--nb-accent); }

.post-card-excerpt {
	color: var(--nb-text-soft);
	font-size: 14.5px;
	margin-bottom: 14px;
	flex: 1;
	display: -webkit-box;
	-webkit-line-clamp: 3;
	line-clamp: 3;
	-webkit-box-orient: vertical;
	overflow: hidden;
}

.post-card-footer {
	display: flex; align-items: center; justify-content: space-between;
	padding-top: 10px;
	border-top: 1px solid var(--nb-border-soft);
	font-size: 13px;
	color: var(--nb-text-muted);
}
.post-card-author { display: inline-flex; align-items: center; gap: 6px; }
.post-card-author img { border-radius: 50%; }
.post-card-more {
	font-size: 13px;
	font-weight: 600;
	color: var(--nb-accent);
}

/* =============================================================
   6. 文章详情页
   ============================================================= */
.single-main { max-width: var(--nb-content-width); margin: 0 auto; }

.post-single {
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
	padding: 32px;
	box-shadow: var(--nb-shadow-soft);
}

.post-single-header { margin-bottom: 24px; }
.post-single-meta { display: flex; gap: 8px; align-items: center; margin-bottom: 10px; }
.post-single .post-cat {
	display: inline-block;
	padding: 3px 12px;
	background: var(--nb-tag-bg);
	color: var(--nb-tag-text);
	font-size: 12.5px;
	font-weight: 600;
	border-radius: 999px;
}
.post-single-time { font-size: 13px; color: var(--nb-text-muted); }

.post-single-title {
	font-size: 2em;
	line-height: 1.3;
	margin: 0 0 12px;
}
.post-single-byline {
	display: flex; align-items: center; gap: 8px;
	color: var(--nb-text-muted);
	font-size: 13.5px;
}
.post-single-author { display: inline-flex; align-items: center; gap: 6px; }
.post-single-author img { border-radius: 50%; }
.post-single-author-name { color: var(--nb-text-soft); font-weight: 600; }

.post-single-thumb {
	margin: 0 0 24px;
	border-radius: var(--nb-radius);
	overflow: hidden;
}
.post-single-thumb img { width: 100%; display: block; }

/* 文章正文 */
.post-single-content {
	font-size: 16px;
	line-height: 1.8;
	color: var(--nb-text);
}
.post-single-content h2,
.post-single-content h3,
.post-single-content h4 { scroll-margin-top: 90px; }
.post-single-content p { margin: 0 0 1.2em; }
.post-single-content a { text-decoration: underline; text-underline-offset: 3px; }
.post-single-content img { border-radius: var(--nb-radius-sm); margin: 1em 0; }
.post-single-content ul,
.post-single-content ol { margin: 0 0 1.2em; padding-left: 1.6em; }
.post-single-content li { margin: 0.3em 0; }

/* 古腾堡兼容 */
.post-single-content .alignwide,
.post-single-content .alignfull { margin-left: calc(-1 * (50vw - 50%)); margin-right: calc(-1 * (50vw - 50%)); max-width: 100vw; }
.post-single-content .alignleft { float: left; margin: 0 1.2em 1em 0; }
.post-single-content .alignright { float: right; margin: 0 0 1em 1.2em; }
.post-single-content .aligncenter { display: block; margin: 1em auto; }
.post-single-content figure { margin: 1.4em 0; }
.post-single-content figcaption { color: var(--nb-text-muted); font-size: 13px; text-align: center; margin-top: 6px; }

.wp-block-quote,
.wp-block-pullquote {
	border-left: 4px solid var(--nb-accent);
	padding: 12px 18px;
	background: var(--nb-bg-alt);
	border-radius: 0 var(--nb-radius-sm) var(--nb-radius-sm) 0;
}
.wp-block-pullquote { padding: 18px 24px; }

.wp-block-separator { border: none; border-top: 1px solid var(--nb-border); margin: 2em 0; }

/* =============================================================
   7. 代码块（深色高亮风格）
   ============================================================= */
.post-single-content pre,
.ai-log-content pre,
.entry-content pre,
.wp-block-preformatted {
	background: var(--nb-bg-code);
	color: #d4d7e0;
	padding: 16px 18px;
	border-radius: var(--nb-radius-sm);
	border: 1px solid var(--nb-border);
	overflow-x: auto;
	font-family: var(--nb-font-mono);
	font-size: 14px;
	line-height: 1.6;
	tab-size: 4;
	-moz-tab-size: 4;
	margin: 1.2em 0;
	-webkit-overflow-scrolling: touch;
}
.post-single-content pre code,
.ai-log-content pre code,
.entry-content pre code,
.wp-block-preformatted code,
.post-single-content code,
.ai-log-content code,
.entry-content code,
.wp-block-code code {
	font-family: var(--nb-font-mono);
	font-size: 14px;
	background: transparent;
	color: inherit;
	padding: 0;
	border-radius: 0;
}

/* 行内代码 */
.post-single-content :not(pre) > code,
.ai-log-content :not(pre) > code,
.entry-content :not(pre) > code {
	background: rgba(102, 126, 234, 0.16);
	color: var(--nb-tag-text);
	padding: 1px 6px;
	border-radius: 5px;
	font-size: 0.92em;
	font-family: var(--nb-font-mono);
}
:root[data-theme="light"] .post-single-content :not(pre) > code,
:root[data-theme="light"] .ai-log-content :not(pre) > code {
	color: #5566c4;
}
@media (prefers-color-scheme: light) {
	:root:not([data-theme="dark"]) .post-single-content :not(pre) > code,
	:root:not([data-theme="dark"]) .ai-log-content :not(pre) > code {
		color: #5566c4;
	}
}

/* 浅色模式代码块沿用深色（技术博客需要稳定阅读体验） */
.post-single-content pre,
.ai-log-content pre {
	background: #0d1117;
	color: #c9d1d9;
	border-color: #1f2428;
}

/* =============================================================
   8. 文章目录 TOC
   ============================================================= */
.nb-toc {
	background: var(--nb-bg-alt);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
	padding: 16px 20px;
	margin: 0 0 24px;
	font-size: 14px;
}
.nb-toc-title {
	font-weight: 700;
	font-size: 13px;
	color: var(--nb-text-muted);
	text-transform: uppercase;
	letter-spacing: 0.05em;
	margin-bottom: 8px;
}
.nb-toc-list {
	list-style: none;
	margin: 0;
	padding: 0;
}
.nb-toc-list a { color: var(--nb-text-soft); }
.nb-toc-list a:hover { color: var(--nb-accent); }
.nb-toc-list li { margin: 4px 0; padding-left: 0; }
.nb-toc-level-2 { padding-left: 0; font-weight: 600; }
.nb-toc-level-3 { padding-left: 14px; }
.nb-toc-level-4 { padding-left: 28px; font-size: 13px; color: var(--nb-text-muted); }
.nb-toc-list li.is-active > a {
	color: var(--nb-accent);
	font-weight: 700;
	position: relative;
}
.nb-toc-list li.is-active > a::before {
	content: "";
	position: absolute;
	left: -10px;
	top: 50%;
	transform: translateY(-50%);
	width: 3px; height: 14px;
	background: var(--nb-accent);
	border-radius: 2px;
}

/* =============================================================
   9. 标签 / 相关文章 / 上下篇导航
   ============================================================= */
.post-single-tags {
	margin: 24px 0;
	padding-top: 20px;
	border-top: 1px solid var(--nb-border-soft);
	display: flex; flex-wrap: wrap; align-items: center; gap: 8px;
}
.post-single-tags .tag-label {
	font-size: 13px;
	color: var(--nb-text-muted);
	font-weight: 700;
}
.post-tag {
	display: inline-block;
	padding: 4px 12px;
	background: var(--nb-tag-bg);
	color: var(--nb-tag-text);
	border-radius: 999px;
	font-size: 13px;
	font-weight: 500;
}
.post-tag:hover { background: var(--nb-accent); color: #fff; }

.related-posts {
	margin: 32px 0 0;
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
	padding: 24px;
}
.related-title {
	font-size: 1.1em;
	margin: 0 0 14px;
	padding-bottom: 10px;
	border-bottom: 1px solid var(--nb-border-soft);
}
.related-list { list-style: none; padding: 0; margin: 0; }
.related-list li { padding: 8px 0; }
.related-list a {
	display: flex; justify-content: space-between; gap: 12px;
	color: var(--nb-text-soft);
	font-size: 14.5px;
	align-items: center;
}
.related-list a:hover { color: var(--nb-accent); }
.related-list time { color: var(--nb-text-muted); font-size: 12.5px; flex-shrink: 0; }

.post-single-footer { margin-top: 28px; }
.post-nav {
	display: flex; justify-content: space-between; gap: 12px;
	flex-wrap: wrap;
	padding-top: 20px;
	border-top: 1px solid var(--nb-border-soft);
}
.post-nav > span {
	flex: 1 1 220px;
	font-size: 14px;
}
.post-nav a {
	display: inline-block;
	padding: 8px 14px;
	background: var(--nb-bg-alt);
	border-radius: var(--nb-radius-sm);
	color: var(--nb-text-soft);
}
.post-nav a:hover { background: var(--nb-accent); color: #fff; }
.post-nav .post-next { text-align: right; }

/* =============================================================
   10. 侧边栏
   ============================================================= */
.widget-area {
	display: flex; flex-direction: column; gap: 18px;
}
.widget {
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
	padding: 18px 20px;
}
.widget-title {
	font-size: 14px;
	margin: 0 0 14px;
	padding-bottom: 10px;
	border-bottom: 1px solid var(--nb-border-soft);
	color: var(--nb-text);
	text-transform: uppercase;
	letter-spacing: 0.04em;
}
.widget ul { list-style: none; padding: 0; margin: 0; }
.widget ul li { padding: 6px 0; font-size: 14px; border-bottom: 1px dashed var(--nb-border-soft); }
.widget ul li:last-child { border-bottom: none; }
.widget ul li a { color: var(--nb-text-soft); }
.widget ul li a:hover { color: var(--nb-accent); }
.widget ul li time {
	display: block;
	font-size: 12px;
	color: var(--nb-text-muted);
	margin-top: 2px;
}

.widget-recent-list { display: flex; flex-direction: column; gap: 0; }
.widget-recent-list li a { display: block; }

.tagcloud { display: flex; flex-wrap: wrap; gap: 6px; }
.tagcloud a {
	display: inline-block;
	padding: 3px 10px;
	background: var(--nb-bg-alt);
	border-radius: 999px;
	font-size: 13px !important;
	color: var(--nb-text-soft);
}
.tagcloud a:hover { background: var(--nb-accent); color: #fff; }

.widget_categories .children { padding-left: 12px; }

/* =============================================================
   11. 归档页 / 搜索页头
   ============================================================= */
.archive-header {
	margin-bottom: 28px;
	padding: 24px;
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
}
.archive-type {
	display: inline-block;
	font-size: 12px;
	font-weight: 700;
	letter-spacing: 0.05em;
	color: var(--nb-accent);
	background: var(--nb-tag-bg);
	padding: 2px 10px;
	border-radius: 999px;
	margin-bottom: 8px;
	text-transform: uppercase;
}
.archive-title {
	font-size: 1.7em;
	margin: 0 0 6px;
}
.archive-desc { color: var(--nb-text-soft); margin: 8px 0 0; font-size: 14.5px; }

.search-header {
	margin-bottom: 24px;
	padding: 24px;
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
	text-align: center;
}
.search-title { font-size: 1.6em; margin: 0 0 14px; }
.search-keyword { color: var(--nb-accent); }
.search-form-wrap { max-width: 480px; margin: 0 auto; }
.search-count { color: var(--nb-text-muted); font-size: 14px; margin: 0 0 18px; }

.search-form-inner {
	display: flex; align-items: center; gap: 6px;
	background: var(--nb-bg);
	border: 1px solid var(--nb-border);
	border-radius: 999px;
	padding: 4px 4px 4px 16px;
}
.search-form-inner .search-field {
	flex: 1;
	background: transparent;
	border: none;
	color: var(--nb-text);
	font-size: 14.5px;
	padding: 8px 0;
}
.search-form-inner .search-field:focus { outline: none; }
.search-form-inner .search-submit {
	display: inline-flex;
	align-items: center; justify-content: center;
	width: 36px; height: 36px;
	background: var(--nb-accent-gradient);
	color: #fff;
	border: none;
	border-radius: 50%;
	cursor: pointer;
}

/* =============================================================
   12. 分页
   ============================================================= */
.pagination,
.nav-links {
	display: flex;
	justify-content: center;
	align-items: center;
	gap: 6px;
	margin: 32px 0 0;
	flex-wrap: wrap;
}
.pagination .page-numbers,
.nav-links a,
.nav-links span {
	display: inline-flex;
	align-items: center; justify-content: center;
	min-width: 38px; height: 38px;
	padding: 0 12px;
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius-sm);
	color: var(--nb-text-soft);
	font-size: 14px;
	font-weight: 500;
}
.pagination .page-numbers:hover,
.nav-links a:hover {
	background: var(--nb-accent);
	color: #fff;
	border-color: var(--nb-accent);
}
.pagination .page-numbers.current,
.nav-links .current {
	background: var(--nb-accent-gradient);
	color: #fff;
	border-color: transparent;
}
.pagination .dots { background: transparent; border: none; }

.page-links {
	clear: both;
	margin: 1.5em 0;
}
.page-links a, .page-links > span {
	display: inline-block;
	padding: 4px 10px;
	margin: 0 3px;
	border: 1px solid var(--nb-border);
	border-radius: var(--nb-radius-sm);
	font-size: 13px;
}

/* =============================================================
   13. 评论区
   ============================================================= */
.comments-area {
	margin-top: 32px;
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: var(--nb-radius);
	padding: 28px;
}
.comments-title { font-size: 1.25em; margin: 0 0 18px; }
.comment-list { list-style: none; padding: 0; margin: 0; }
.comment-list .children { list-style: none; padding-left: 24px; }
.nb-comment { padding: 14px 0; border-bottom: 1px solid var(--nb-border-soft); }
.nb-comment:last-child { border-bottom: none; }
.nb-comment-body { }
.nb-comment-meta { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; flex-wrap: wrap; gap: 8px; }
.nb-comment-author { display: inline-flex; align-items: center; gap: 8px; font-weight: 600; }
.nb-comment-author img { border-radius: 50%; }
.nb-comment-author a { color: var(--nb-text); }
.nb-comment-time { font-size: 12.5px; color: var(--nb-text-muted); }
.nb-comment-content { color: var(--nb-text-soft); font-size: 14.5px; }
.nb-comment-content p:last-child { margin-bottom: 0; }
.nb-comment-reply { margin-top: 8px; }
.nb-comment-reply a {
	display: inline-block;
	padding: 3px 10px;
	background: var(--nb-bg-alt);
	border-radius: var(--nb-radius-sm);
	font-size: 13px;
	color: var(--nb-text-soft);
}

#respond {
	margin-top: 24px;
	padding-top: 20px;
	border-top: 1px solid var(--nb-border-soft);
}
#reply-title { font-size: 1.1em; }
#respond .comment-form label { display: block; font-size: 13px; color: var(--nb-text-soft); margin-bottom: 4px; }
#respond input[type="text"],
#respond input[type="email"],
#respond input[type="url"],
#respond textarea {
	width: 100%;
	padding: 10px 14px;
	background: var(--nb-bg);
	border: 1px solid var(--nb-border);
	border-radius: var(--nb-radius-sm);
	color: var(--nb-text);
	font-size: 14.5px;
	font-family: var(--nb-font);
	margin-bottom: 12px;
}
#respond input[type="text"]:focus,
#respond input[type="email"]:focus,
#respond input[type="url"]:focus,
#respond textarea:focus {
	border-color: var(--nb-accent);
	outline: none;
}
#respond .form-submit input,
#respond .submit {
	padding: 10px 22px;
	background: var(--nb-accent-gradient);
	color: #fff;
	border: none;
	border-radius: var(--nb-radius-sm);
	font-size: 14.5px;
	font-weight: 600;
	cursor: pointer;
}
.comment-form-cookies-consent { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--nb-text-muted); margin-bottom: 12px; }

/* =============================================================
   14. 404 页面
   ============================================================= */
.error-404 { text-align: center; padding: 60px 20px; }
.error-404-inner { max-width: 640px; margin: 0 auto; }
.error-code {
	font-size: 6em;
	font-weight: 900;
	line-height: 1;
	background: var(--nb-accent-gradient);
	-webkit-background-clip: text;
	background-clip: text;
	-webkit-text-fill-color: transparent;
	color: transparent;
	margin-bottom: 12px;
}
.error-title { font-size: 1.6em; margin: 0 0 12px; }
.error-desc { color: var(--nb-text-soft); margin-bottom: 24px; }
.error-actions { margin-bottom: 28px; }

.btn {
	display: inline-block;
	padding: 10px 24px;
	border-radius: var(--nb-radius-sm);
	font-size: 14.5px;
	font-weight: 600;
	cursor: pointer;
	border: none;
	transition: all var(--nb-transition);
}
.btn-primary {
	background: var(--nb-accent-gradient);
	color: #fff;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: var(--nb-shadow); color: #fff; }

.error-search { max-width: 480px; margin: 0 auto 32px; }
.error-cats { text-align: left; }
.error-cats h2 { font-size: 1.15em; text-align: center; }
.error-cats ul { list-style: none; padding: 0; display: flex; flex-wrap: wrap; justify-content: center; gap: 8px; }
.error-cats a {
	display: inline-block;
	padding: 4px 14px;
	background: var(--nb-bg-card);
	border: 1px solid var(--nb-border-soft);
	border-radius: 999px;
	font-size: 14px;
	color: var(--nb-text-soft);
}
.error-cats a:hover { background: var(--nb-accent); color: #fff; border-color: transparent; }

.no-results {
	text-align: center;
	padding: 60px 20px;
}
.no-results .page-title { font-size: 1.4em; }
.no-results .search-form-inner { max-width: 480px; margin: 16px auto 0; }

/* =============================================================
   15. 页脚
   ============================================================= */
.site-footer {
	border-top: 1px solid var(--nb-border-soft);
	background: var(--nb-bg-alt);
	margin-top: 60px;
	padding: 32px 20px;
}
.site-footer-inner {
	max-width: var(--nb-max-width);
	margin: 0 auto;
	display: flex; flex-direction: column;
	align-items: center; gap: 14px;
	text-align: center;
}
.site-footer-brand a {
	color: var(--nb-text);
	font-weight: 700;
	font-size: 16px;
}
.site-description { font-size: 13px; color: var(--nb-text-muted); margin: 4px 0 0; }

.footer-navigation ul {
	list-style: none; padding: 0; margin: 0;
	display: flex; flex-wrap: wrap; justify-content: center; gap: 6px;
}
.footer-navigation a {
	display: inline-block;
	padding: 4px 12px;
	color: var(--nb-text-soft);
	font-size: 13.5px;
	border-radius: var(--nb-radius-sm);
}
.footer-navigation a:hover { color: var(--nb-accent); background: var(--nb-bg); }

.site-footer-meta { font-size: 13px; color: var(--nb-text-muted); display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.site-footer-meta .sep { color: var(--nb-text-muted); }
.site-footer-meta a { color: var(--nb-text-muted); }
.site-footer-meta a:hover { color: var(--nb-accent); }

/* =============================================================
   16. 响应式：平板
   ============================================================= */
@media (max-width: 1024px) {
	:root {
		--nb-gap: 24px;
		--nb-sidebar-width: 260px;
	}
	.content-grid {
		grid-template-columns: minmax(0, 1fr);
	}
	.widget-area {
		position: static;
		display: grid;
		grid-template-columns: repeat(2, minmax(0, 1fr));
		gap: 18px;
	}
}

/* =============================================================
   17. 响应式：移动端 (<768px)
   ============================================================= */
@media (max-width: 767px) {
	:root { --nb-radius: 12px; }

	.site-content { padding: 20px 14px; }
	.site-header-inner { padding: 0 14px; gap: 10px; height: 56px; }
	.site-logo-text { font-size: 15px; }
	.site-logo-mark { width: 26px; height: 26px; font-size: 14px; }
	.custom-logo-link img { max-height: 32px; }

	/* 主菜单切换为抽屉式 */
	.menu-toggle { display: inline-flex; align-items: center; justify-content: center; }
	.main-navigation {
		position: absolute;
		top: 100%; left: 0; right: 0;
		background: var(--nb-bg);
		border-bottom: 1px solid var(--nb-border);
		max-height: 0;
		overflow: hidden;
		transition: max-height 0.3s ease;
		z-index: 99;
	}
	.main-navigation.active { max-height: 80vh; overflow-y: auto; }
	.main-navigation .nav-menu {
		flex-direction: column;
		padding: 12px 14px;
		gap: 2px;
	}
	.main-navigation .menu-item {
		width: 100%;
	}
	.main-navigation .menu-item a {
		padding: 12px 14px;
		display: block;
		width: 100%;
	}

	.search-overlay { padding: 14px; }
	.search-overlay .search-form { flex-direction: row; }

	.hero-section { padding: 24px 0 20px; margin-bottom: 20px; }
	.hero-title { font-size: 1.7em; }
	.hero-desc { font-size: 14px; }
	.hero-cats { gap: 8px; }
	.hero-cat { padding: 6px 12px; font-size: 13px; }

	/* 卡片单列 */
	.post-card-list { grid-template-columns: 1fr; gap: 16px; }

	.post-card-thumb { aspect-ratio: 16 / 9; }
	.post-card-body { padding: 16px; }
	.post-card-title { font-size: 1.1em; }

	/* 文章详情 */
	.post-single {
		padding: 18px 16px;
		border-radius: var(--nb-radius);
	}
	.post-single-title { font-size: 1.5em; }
	.post-single-content { font-size: 15.5px; }
	.post-single-content .alignwide,
	.post-single-content .alignfull {
		margin-left: -16px;
		margin-right: -16px;
		max-width: none;
		width: calc(100% + 32px);
	}

	.nb-toc { padding: 12px 14px; font-size: 13.5px; }

	.related-posts { padding: 18px; }

	/* 侧边栏单列 */
	.widget-area { grid-template-columns: 1fr; }

	/* 上下篇导航堆叠 */
	.post-nav { flex-direction: column; }
	.post-nav > span { width: 100%; }
	.post-nav .post-next { text-align: left; }

	/* 评论 */
	.comments-area { padding: 18px; }
	.comment-list .children { padding-left: 14px; }

	/* 归档/搜索头 */
	.archive-header, .search-header { padding: 18px; }
	.archive-title, .search-title { font-size: 1.4em; }

	/* 404 */
	.error-code { font-size: 4em; }
	.error-title { font-size: 1.3em; }
}

/* =============================================================
   18. 超小屏 (375px 及以下)
   ============================================================= */
@media (max-width: 380px) {
	.site-content { padding: 14px 10px; }
	.post-card-body { padding: 14px; }
	.post-single { padding: 14px 12px; }
	.post-single-title { font-size: 1.35em; }
	.hero-cats { flex-direction: column; align-items: stretch; }
	.hero-cat { justify-content: center; }
	.site-footer-meta { font-size: 12px; }
}

/* =============================================================
   19. 大屏优化
   ============================================================= */
@media (min-width: 1440px) {
	:root { --nb-max-width: 1280px; }
}

/* =============================================================
   20. 辅助：图片占位（特色图为空时）
   ============================================================= */
.has-post-thumbnail .post-card-thumb { background: var(--nb-accent-gradient); }
.has-post-thumbnail .post-card-thumb img { background: var(--nb-bg-card); }

/* 文章状态：私有文章标识 */
.post-private .post-card-title::before {
	content: "🔒 ";
}

/* 选中文本 */
::selection { background: rgba(102, 126, 234, 0.35); color: #fff; }

/* 滚动条美化（webkit） */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--nb-bg); }
::-webkit-scrollbar-thumb { background: var(--nb-border); border-radius: 8px; }
::-webkit-scrollbar-thumb:hover { background: var(--nb-accent); }