/*
Theme Name: XChatApp Kimi 2.7
Author: XChatApp.net
Description: XChatApp.net 独立第三方中文教程与 AI 资讯平台主题。知识雷达（Knowledge Radar）视觉系统：墨黑/暖白底、电光青品牌强调、编辑部式非对称首页、六栏目独立图形符号、无特色图自动封面占位、中文长文阅读栏、手机优先、克制动效并完整支持 prefers-reduced-motion。SEO 元信息交由 Rank Math 输出，本主题不重复输出。
Version: 2.7.0
Requires at least: 6.0
Tested up to: 6.7
Requires PHP: 7.4
License: GNU General Public License v2 or later
Text Domain: xchatapp-k27
Tags: blog, news, one-column, custom-logo, custom-menu, featured-images, threaded-comments, translation-ready
*/

/* ---------------------------------------------------------------------------
   1. 设计令牌（Design Tokens）
--------------------------------------------------------------------------- */
:root {
	/* 墨黑 / 暖白基底 */
	--ink-950: #101110;
	--ink-900: #161816;
	--ink-850: #1a1c19;
	--ink-800: #20231f;
	--ink-700: #2b2f29;
	--paper: #f5f1e6;
	--paper-2: #ece6d4;
	--paper-3: #e3dcc7;

	/* 文字 */
	--text-on-ink: #eae7dc;
	--muted-on-ink: #9aa093;
	--faint-on-ink: #6d7367;
	--text-on-paper: #1c1e1a;
	--muted-on-paper: #565c4e;

	/* 线条 */
	--line-ink: rgba(234, 231, 220, 0.09);
	--line-ink-strong: rgba(234, 231, 220, 0.18);
	--line-paper: rgba(28, 30, 26, 0.14);

	/* 品牌强调：电光青（唯一主强调） */
	--cyan: #2fe6c4;
	--cyan-strong: #19cfa9;
	--cyan-soft: rgba(47, 230, 196, 0.13);
	--cyan-glow: rgba(47, 230, 196, 0.16);

	/* 栏目主题色（六栏目各一，克制使用） */
	--acc-guide: #2fe6c4;      /* XChat 入门 */
	--acc-tutorial: #7cc7ff;   /* 功能教程 */
	--acc-faq: #f5b94a;        /* 问题解决 */
	--acc-comparison: #b9a8ff; /* 对比评测 */
	--acc-grok: #ff8a6b;       /* Grok / xAI */
	--acc-agent: #c8f04e;      /* AI Agent / AI 工具 */

	/* 字体栈：系统字体，无远程字体 */
	--font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
		"Noto Sans CJK SC", "Source Han Sans SC", "Helvetica Neue", Arial, sans-serif;
	--font-mono: ui-monospace, "SF Mono", "Cascadia Mono", "JetBrains Mono",
		Consolas, "Liberation Mono", monospace;

	/* 排版节奏 */
	--read-width: 744px;
	--container: 1180px;
	--radius: 10px;
	--radius-sm: 6px;
	--ease: cubic-bezier(0.22, 0.61, 0.36, 1);
	--dur-fast: 160ms;
	--dur-base: 260ms;
	--dur-slow: 480ms;
}

/* ---------------------------------------------------------------------------
   2. 基础与重置
--------------------------------------------------------------------------- */
*,
*::before,
*::after {
	box-sizing: border-box;
}

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

body {
	margin: 0;
	background: var(--ink-950);
	color: var(--text-on-ink);
	font-family: var(--font-sans);
	font-size: 16px;
	line-height: 1.75;
	overflow-x: clip;
	text-rendering: optimizeLegibility;
	-webkit-font-smoothing: antialiased;
}

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

figure {
	margin: 0;
}

a {
	color: var(--cyan);
	text-decoration-thickness: 1px;
	text-underline-offset: 3px;
}

a:hover {
	color: var(--cyan-strong);
}

h1, h2, h3, h4, h5, h6 {
	line-height: 1.3;
	letter-spacing: -0.01em;
	overflow-wrap: break-word;
	margin: 0 0 0.6em;
}

p {
	overflow-wrap: break-word;
}

ul, ol {
	padding-left: 1.4em;
}

button {
	font-family: inherit;
}

/* 面板收起状态由 UA 默认 [hidden] 处理；导航在桌面端忽略 hidden */

[id] {
	scroll-margin-top: 96px;
}

::selection {
	background: var(--cyan);
	color: var(--ink-950);
}

:focus-visible {
	outline: 2px solid var(--cyan);
	outline-offset: 3px;
	border-radius: 2px;
}

.container {
	max-width: var(--container);
	margin-inline: auto;
	padding-inline: 20px;
}

.skip-link {
	position: absolute;
	left: -9999px;
	top: 0;
	z-index: 200;
	background: var(--cyan);
	color: var(--ink-950);
	padding: 10px 18px;
	font-weight: 700;
	text-decoration: none;
	border-radius: 0 0 var(--radius-sm) 0;
}

.skip-link:focus {
	left: 0;
}

.screen-reader-text {
	border: 0;
	clip: rect(1px, 1px, 1px, 1px);
	clip-path: inset(50%);
	height: 1px;
	width: 1px;
	margin: -1px;
	overflow: hidden;
	padding: 0;
	position: absolute;
	word-wrap: normal;
}

.screen-reader-text:focus {
	clip: auto;
	clip-path: none;
	height: auto;
	width: auto;
	margin: 0;
	padding: 12px 20px;
	background: var(--paper);
	color: var(--text-on-paper);
	z-index: 300;
	left: 8px;
	top: 8px;
}

/* ---------------------------------------------------------------------------
   3. 页头与导航
--------------------------------------------------------------------------- */
.site-header {
	position: sticky;
	top: 0;
	z-index: 100;
	background: var(--ink-950);
	border-bottom: 1px solid var(--line-ink);
}

.site-header__inner {
	display: flex;
	align-items: center;
	gap: 20px;
	min-height: 68px;
}

.site-brand {
	display: inline-flex;
	align-items: center;
	gap: 12px;
	text-decoration: none;
	color: var(--text-on-ink);
	min-height: 44px;
}

.site-brand:hover {
	color: var(--text-on-ink);
}

.site-brand__mark {
	display: block;
	flex: none;
}

.site-brand__custom-logo {
	display: block;
	flex: none;
	width: auto;
	max-width: 120px;
	max-height: 34px;
	object-fit: contain;
}

.site-brand__word {
	font-weight: 800;
	font-size: 19px;
	letter-spacing: -0.02em;
	line-height: 1.1;
}

.site-brand__tld {
	color: var(--cyan);
}

.site-brand__note {
	display: block;
	font-family: var(--font-mono);
	font-size: 10px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--muted-on-ink);
	margin-top: 3px;
}

/* Polylang：插件启用时渐进显示语言切换，未启用时不占空间。 */
.site-header__lang {
	flex: none;
}

.site-header__lang ul {
	display: flex;
	align-items: center;
	gap: 4px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.site-header__lang a {
	display: inline-flex;
	align-items: center;
	min-height: 44px;
	padding-inline: 8px;
	border-radius: var(--radius-sm);
	color: var(--muted-on-ink);
	font-family: var(--font-mono);
	font-size: 12px;
	text-decoration: none;
}

.site-header__lang a:hover,
.site-header__lang a:focus-visible,
.site-header__lang .current-lang > a {
	color: var(--cyan);
	background: var(--cyan-soft);
}

.site-nav {
	margin-left: auto;
}

/* 桌面端：即使 JS 收起面板（hidden 属性）也保持可见 */
.site-nav[hidden] {
	display: block;
}

.site-nav__list {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 2px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.site-nav__link {
	display: inline-flex;
	align-items: center;
	min-height: 44px;
	padding: 8px 14px;
	color: var(--text-on-ink);
	text-decoration: none;
	font-size: 15px;
	border-radius: var(--radius-sm);
	transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}

.site-nav__link:hover,
.site-nav__link:focus-visible {
	color: var(--cyan);
	background: var(--cyan-soft);
}

.site-nav__link[aria-current="page"] {
	color: var(--cyan);
}

.site-header__actions {
	display: flex;
	align-items: center;
	gap: 8px;
	margin-left: 6px;
}

.icon-btn {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	min-width: 44px;
	min-height: 44px;
	padding: 8px 14px;
	background: transparent;
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius-sm);
	color: var(--text-on-ink);
	cursor: pointer;
	font-size: 14px;
	transition: border-color var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease),
		background var(--dur-fast) var(--ease);
}

.icon-btn:hover {
	border-color: var(--cyan);
	color: var(--cyan);
	background: var(--cyan-soft);
}

.icon-btn[aria-expanded="true"] {
	border-color: var(--cyan);
	color: var(--cyan);
}

.nav-toggle {
	display: none;
}

.nav-toggle__bar {
	display: block;
	width: 20px;
	height: 2px;
	background: currentColor;
	border-radius: 2px;
	transition: transform var(--dur-base) var(--ease), opacity var(--dur-base) var(--ease);
}

.nav-toggle__bar + .nav-toggle__bar {
	margin-top: 5px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(1) {
	transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(2) {
	opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle__bar:nth-child(3) {
	transform: translateY(-7px) rotate(-45deg);
}

/* 搜索面板（页头下拉） */
.site-search {
	background: var(--ink-900);
	border-bottom: 1px solid var(--line-ink-strong);
}

.site-search__inner {
	display: flex;
	align-items: center;
	gap: 12px;
	padding-block: 14px;
}

.site-search .search-form {
	flex: 1;
}

.site-search__close {
	flex: none;
}

/* ---------------------------------------------------------------------------
   4. 搜索表单
--------------------------------------------------------------------------- */
.search-form {
	display: flex;
	align-items: center;
	gap: 8px;
	width: 100%;
}

.search-form__input {
	flex: 1;
	min-height: 46px;
	padding: 10px 16px;
	font-size: 15px;
	font-family: inherit;
	color: var(--text-on-ink);
	background: var(--ink-850);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius-sm);
	transition: border-color var(--dur-fast) var(--ease);
}

.search-form__input::placeholder {
	color: var(--faint-on-ink);
}

.search-form__input:focus {
	border-color: var(--cyan);
	outline: none;
}

.search-form__submit {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	gap: 8px;
	min-height: 46px;
	padding: 8px 18px;
	font-size: 14px;
	font-weight: 700;
	color: var(--ink-950);
	background: var(--cyan);
	border: 1px solid var(--cyan);
	border-radius: var(--radius-sm);
	cursor: pointer;
	transition: background var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.search-form__submit:hover {
	background: var(--cyan-strong);
}

.search-form__submit:active {
	transform: translateY(1px);
}

/* 暖白区块内的搜索表单 */
.paper-section .search-form__input {
	color: var(--text-on-paper);
	background: #fff;
	border-color: var(--line-paper);
}

/* ---------------------------------------------------------------------------
   5. 首页 Hero：知识雷达首屏
--------------------------------------------------------------------------- */
.xchatapp-hero {
	position: relative;
	background: var(--ink-950);
	border-bottom: 1px solid var(--line-ink);
	overflow: clip;
}

/* 极轻网格 + 极轻光晕（克制：单一来源、低透明度） */
.xchatapp-hero::before {
	content: "";
	position: absolute;
	inset: 0;
	pointer-events: none;
	background-image:
		linear-gradient(var(--line-ink) 1px, transparent 1px),
		linear-gradient(90deg, var(--line-ink) 1px, transparent 1px);
	background-size: 56px 56px;
	mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 82%);
	-webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.7), transparent 82%);
}

.xchatapp-hero::after {
	content: "";
	position: absolute;
	top: -180px;
	right: -140px;
	width: 520px;
	height: 520px;
	border-radius: 50%;
	pointer-events: none;
	background: radial-gradient(circle, var(--cyan-glow) 0%, transparent 65%);
	opacity: 0.55;
}

.hero__inner {
	position: relative;
	display: grid;
	grid-template-columns: 1.12fr 0.88fr;
	gap: 48px;
	align-items: center;
	padding-block: 64px 56px;
}

.hero__kicker {
	margin: 0 0 14px;
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: var(--cyan);
	display: flex;
	align-items: center;
	gap: 10px;
}

.hero__kicker::before {
	content: "";
	width: 26px;
	height: 2px;
	background: var(--cyan);
	display: inline-block;
}

.hero__title {
	font-size: clamp(1.9rem, 1.15rem + 3vw, 3.05rem);
	line-height: 1.18;
	font-weight: 800;
	letter-spacing: -0.02em;
	margin: 0 0 18px;
}

.hero__title .accent {
	color: var(--cyan);
}

.hero__subtitle {
	margin: 0 0 26px;
	color: var(--muted-on-ink);
	font-size: 16.5px;
	max-width: 34em;
}

.hero__search {
	max-width: 560px;
	margin-bottom: 24px;
}

.hero__links {
	display: flex;
	flex-wrap: wrap;
	gap: 8px 22px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.hero__link a {
	color: var(--muted-on-ink);
	font-size: 14px;
	text-decoration: none;
	display: inline-flex;
	align-items: center;
	gap: 8px;
	min-height: 44px;
	transition: color var(--dur-fast) var(--ease);
}

.hero__link a::before {
	content: attr(data-n);
	font-family: var(--font-mono);
	font-size: 11px;
	color: var(--cyan);
}

.hero__link a:hover {
	color: var(--text-on-ink);
}

/* --- 知识雷达面板 --- */
.radar-panel {
	position: relative;
	background: var(--ink-900);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius);
	padding: 22px;
	box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.radar-panel__head {
	display: flex;
	align-items: center;
	gap: 10px;
	margin-bottom: 18px;
}

.radar-panel__icon {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 34px;
	height: 34px;
	border-radius: 8px;
	background: var(--cyan-soft);
	color: var(--cyan);
	flex: none;
}

.radar-panel__title {
	margin: 0;
	font-size: 15px;
	font-weight: 700;
	letter-spacing: 0.02em;
}

.radar-panel__status {
	margin-left: auto;
	display: inline-flex;
	align-items: center;
	gap: 7px;
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.1em;
	color: var(--muted-on-ink);
	text-transform: uppercase;
}

.radar-panel__status-dot {
	width: 7px;
	height: 7px;
	border-radius: 50%;
	background: var(--cyan);
	box-shadow: 0 0 0 0 var(--cyan-glow);
	animation: radar-pulse 2.6s var(--ease) infinite;
}

.radar {
	position: relative;
	aspect-ratio: 1 / 1;
	width: 100%;
	max-width: 360px;
	margin-inline: auto;
}

.radar__ring {
	position: absolute;
	border: 1px solid var(--line-ink-strong);
	border-radius: 50%;
}

.radar__ring--1 { inset: 0; }
.radar__ring--2 { inset: 16.6%; }
.radar__ring--3 { inset: 33.2%; }

.radar__cross {
	position: absolute;
	inset: 0;
}

.radar__cross::before,
.radar__cross::after {
	content: "";
	position: absolute;
	background: var(--line-ink);
}

.radar__cross::before {
	left: 50%;
	top: 0;
	bottom: 0;
	width: 1px;
	transform: translateX(-50%);
}

.radar__cross::after {
	top: 50%;
	left: 0;
	right: 0;
	height: 1px;
	transform: translateY(-50%);
}

.radar__sweep {
	position: absolute;
	inset: 0;
	border-radius: 50%;
	background: conic-gradient(
		from 0deg,
		rgba(47, 230, 196, 0.32) 0deg,
		rgba(47, 230, 196, 0.05) 62deg,
		transparent 62deg
	);
	animation: radar-sweep 4.2s linear infinite;
	pointer-events: none;
}

.radar__blip {
	position: absolute;
	transform: translate(-50%, -50%);
	display: flex;
	flex-direction: column;
	align-items: center;
	gap: 5px;
	z-index: 2;
}

.radar__blip-dot {
	width: 9px;
	height: 9px;
	border-radius: 50%;
	background: var(--blip-color, var(--cyan));
	box-shadow: 0 0 0 3px color-mix(in srgb, var(--blip-color, var(--cyan)) 22%, transparent);
	animation: radar-pulse 2.6s var(--ease) infinite;
	animation-delay: var(--blip-delay, 0s);
}

.radar__blip-label {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.06em;
	color: var(--muted-on-ink);
	white-space: nowrap;
	background: rgba(16, 17, 16, 0.72);
	border: 1px solid var(--line-ink);
	border-radius: 999px;
	padding: 2px 8px;
}

.radar__blip-label b {
	color: var(--blip-color, var(--cyan));
	font-weight: 700;
}

.radar-panel__foot {
	margin-top: 18px;
	padding-top: 14px;
	border-top: 1px solid var(--line-ink);
	display: flex;
	align-items: center;
	gap: 8px;
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.08em;
	text-transform: uppercase;
	color: var(--faint-on-ink);
}

.radar-panel__foot-dot {
	width: 4px;
	height: 4px;
	border-radius: 50%;
	background: var(--cyan);
	flex: none;
}

@keyframes radar-sweep {
	to {
		transform: rotate(360deg);
	}
}

@keyframes radar-pulse {
	0% {
		box-shadow: 0 0 0 0 var(--cyan-glow);
	}
	70% {
		box-shadow: 0 0 0 9px transparent;
	}
	100% {
		box-shadow: 0 0 0 0 transparent;
	}
}

/* ---------------------------------------------------------------------------
   6. 区块头与通用小节
--------------------------------------------------------------------------- */
.section-head {
	margin-bottom: 30px;
}

.section-kicker {
	margin: 0 0 8px;
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	display: flex;
	align-items: center;
	gap: 10px;
}

.section-kicker::before {
	content: "";
	width: 22px;
	height: 2px;
	display: inline-block;
}

.section-title {
	font-size: clamp(1.45rem, 1.15rem + 1.1vw, 2rem);
	font-weight: 800;
	margin: 0 0 8px;
}

.section-desc {
	margin: 0;
	color: var(--muted-on-ink);
	max-width: 40em;
}

.section-more {
	margin: 34px 0 0;
}

.btn {
	display: inline-flex;
	align-items: center;
	gap: 8px;
	min-height: 44px;
	padding: 10px 20px;
	border-radius: var(--radius-sm);
	font-size: 14.5px;
	font-weight: 700;
	text-decoration: none;
	transition: background var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease),
		color var(--dur-fast) var(--ease), transform var(--dur-fast) var(--ease);
}

.btn--ghost {
	border: 1px solid var(--line-ink-strong);
	color: var(--text-on-ink);
	background: transparent;
}

.btn--ghost:hover {
	border-color: var(--cyan);
	color: var(--cyan);
	background: var(--cyan-soft);
}

.btn--cyan {
	background: var(--cyan);
	color: var(--ink-950);
	border: 1px solid var(--cyan);
}

.btn--cyan:hover {
	background: var(--cyan-strong);
	color: var(--ink-950);
}

/* ---------------------------------------------------------------------------
   7. 栏目索引（六个栏目，六个符号）
--------------------------------------------------------------------------- */
.xchatapp-topics {
	background: var(--paper);
	color: var(--text-on-paper);
	padding-block: 72px;
}

.xchatapp-topics .section-kicker {
	color: #8a6d1f;
}

.xchatapp-topics .section-kicker::before {
	background: #8a6d1f;
}

.xchatapp-topics .section-desc {
	color: var(--muted-on-paper);
}

.topics-index {
	list-style: none;
	margin: 0;
	padding: 0;
	border-top: 1px solid var(--line-paper);
}

.topic-row {
	border-bottom: 1px solid var(--line-paper);
}

.topic-row__link {
	display: grid;
	grid-template-columns: 56px 48px 1fr auto;
	align-items: center;
	gap: 18px;
	padding: 20px 8px;
	text-decoration: none;
	color: var(--text-on-paper);
	min-height: 44px;
	transition: background var(--dur-base) var(--ease), padding var(--dur-base) var(--ease);
}

.topic-row__link:hover {
	background: var(--paper-2);
	padding-inline: 14px;
}

.topic-row__num {
	font-family: var(--font-mono);
	font-size: 13px;
	color: var(--muted-on-paper);
	letter-spacing: 0.06em;
}

.topic-row__glyph {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	width: 42px;
	height: 42px;
	border-radius: 9px;
	background: var(--ink-950);
	color: var(--topic-accent, var(--cyan));
	flex: none;
}

.topic-row__name {
	margin: 0 0 3px;
	font-size: 17.5px;
	font-weight: 800;
	letter-spacing: -0.01em;
}

.topic-row__desc {
	margin: 0;
	font-size: 14px;
	color: var(--muted-on-paper);
	overflow-wrap: break-word;
}

.topic-row__meta {
	display: inline-flex;
	align-items: center;
	gap: 12px;
	font-family: var(--font-mono);
	font-size: 12px;
	color: var(--muted-on-paper);
	white-space: nowrap;
}

.topic-row__arrow {
	color: var(--topic-accent, var(--cyan));
	transition: transform var(--dur-base) var(--ease);
}

.topic-row__link:hover .topic-row__arrow {
	transform: translateX(5px);
}

/* ---------------------------------------------------------------------------
   8. 最新文章（编辑部式布局）
--------------------------------------------------------------------------- */
.xchatapp-latest {
	background: var(--ink-950);
	padding-block: 72px;
	border-top: 1px solid var(--line-ink);
}

.xchatapp-latest .section-kicker {
	color: var(--cyan);
}

.xchatapp-latest .section-kicker::before {
	background: var(--cyan);
}

/* 主文章 */
.latest-featured {
	display: grid;
	grid-template-columns: 1.05fr 0.95fr;
	gap: 0;
	background: var(--ink-900);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius);
	overflow: hidden;
	margin-bottom: 26px;
	transition: border-color var(--dur-base) var(--ease);
}

.latest-featured:hover {
	border-color: var(--line-ink-strong);
}

.latest-featured__cover {
	position: relative;
	min-height: 280px;
	background: var(--ink-850);
	border-right: 1px solid var(--line-ink);
}

.latest-featured__cover img,
.latest-featured__cover svg {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.latest-featured__flag {
	position: absolute;
	top: 14px;
	left: 14px;
	z-index: 2;
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	background: var(--ink-950);
	color: var(--cyan);
	border: 1px solid var(--line-ink-strong);
	border-radius: 999px;
	padding: 4px 10px;
}

.latest-featured__body {
	display: flex;
	flex-direction: column;
	justify-content: center;
	padding: 30px 32px;
}

.post-chip {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	align-self: flex-start;
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.1em;
	text-transform: uppercase;
	color: var(--chip-color, var(--cyan));
	border: 1px solid color-mix(in srgb, var(--chip-color, var(--cyan)) 45%, transparent);
	background: color-mix(in srgb, var(--chip-color, var(--cyan)) 10%, transparent);
	border-radius: 999px;
	padding: 4px 11px;
	margin-bottom: 14px;
}

.post-chip::before {
	content: "";
	width: 6px;
	height: 6px;
	border-radius: 50%;
	background: currentColor;
}

.latest-featured__title {
	margin: 0 0 10px;
	font-size: clamp(1.25rem, 1.05rem + 0.9vw, 1.7rem);
	font-weight: 800;
	line-height: 1.35;
}

.latest-featured__title a {
	color: var(--text-on-ink);
	text-decoration: none;
	transition: color var(--dur-fast) var(--ease);
}

.latest-featured__title a:hover {
	color: var(--cyan);
}

.latest-featured__excerpt {
	margin: 0 0 18px;
	color: var(--muted-on-ink);
	font-size: 15px;
}

.post-meta {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 8px 18px;
	font-size: 13px;
	color: var(--faint-on-ink);
	margin: 0;
}

.post-meta time {
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.04em;
}

.post-meta__sep {
	width: 3px;
	height: 3px;
	border-radius: 50%;
	background: var(--faint-on-ink);
}

/* 次要文章：编号列表 */
.latest-list {
	list-style: none;
	margin: 0;
	padding: 0;
	border-top: 1px solid var(--line-ink);
}

.latest-item {
	border-bottom: 1px solid var(--line-ink);
}

.latest-item__link {
	display: grid;
	grid-template-columns: 44px 108px 1fr auto;
	align-items: center;
	gap: 18px;
	padding: 14px 10px;
	text-decoration: none;
	color: var(--text-on-ink);
	transition: background var(--dur-base) var(--ease), padding var(--dur-base) var(--ease);
}

.latest-item__link:hover {
	background: var(--ink-900);
	padding-inline: 16px;
}

.latest-item__index {
	font-family: var(--font-mono);
	font-size: 13px;
	color: var(--faint-on-ink);
	letter-spacing: 0.08em;
}

.latest-item__thumb {
	position: relative;
	aspect-ratio: 4 / 3;
	border-radius: var(--radius-sm);
	overflow: hidden;
	background: var(--ink-850);
	border: 1px solid var(--line-ink);
}

.latest-item__thumb img,
.latest-item__thumb svg {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.latest-item__title {
	margin: 0 0 4px;
	font-size: 15.5px;
	font-weight: 700;
	line-height: 1.45;
}

.latest-item__title a {
	color: var(--text-on-ink);
	text-decoration: none;
	transition: color var(--dur-fast) var(--ease);
}

.latest-item__title a:hover {
	color: var(--cyan);
}

.latest-item__meta {
	font-family: var(--font-mono);
	font-size: 12px;
	color: var(--faint-on-ink);
	letter-spacing: 0.04em;
}

.latest-item__arrow {
	color: var(--faint-on-ink);
	transition: color var(--dur-fast) var(--ease), transform var(--dur-base) var(--ease);
}

.latest-item__link:hover .latest-item__arrow {
	color: var(--cyan);
	transform: translateX(4px);
}

/* ---------------------------------------------------------------------------
   9. 文章卡片（归档 / 搜索 / 相关阅读）
--------------------------------------------------------------------------- */
.cards-grid {
	display: grid;
	grid-template-columns: repeat(3, 1fr);
	gap: 22px;
}

.card {
	display: flex;
	flex-direction: column;
	background: var(--ink-900);
	border: 1px solid var(--line-ink-strong);
	border-top: 3px solid var(--card-accent, var(--cyan));
	border-radius: var(--radius);
	overflow: hidden;
	transition: transform var(--dur-base) var(--ease), border-color var(--dur-base) var(--ease),
		box-shadow var(--dur-base) var(--ease);
}

.card:hover {
	transform: translateY(-3px);
	border-color: var(--line-ink-strong);
	box-shadow: 0 16px 40px rgba(0, 0, 0, 0.35);
}

.card__cover {
	position: relative;
	aspect-ratio: 16 / 10;
	background: var(--ink-850);
	border-bottom: 1px solid var(--line-ink);
	overflow: hidden;
}

.card__cover img,
.card__cover svg {
	position: absolute;
	inset: 0;
	width: 100%;
	height: 100%;
	object-fit: cover;
}

.card__body {
	display: flex;
	flex-direction: column;
	flex: 1;
	padding: 20px 20px 22px;
}

.card__chip {
	align-self: flex-start;
	margin-bottom: 12px;
}

.card__title {
	margin: 0 0 8px;
	font-size: 17px;
	font-weight: 800;
	line-height: 1.4;
}

.card__title a {
	color: var(--text-on-ink);
	text-decoration: none;
	transition: color var(--dur-fast) var(--ease);
}

.card__title a:hover {
	color: var(--cyan);
}

.card__excerpt {
	margin: 0 0 16px;
	font-size: 14px;
	color: var(--muted-on-ink);
	flex: 1;
}

.card__meta {
	display: flex;
	align-items: center;
	gap: 10px;
	font-family: var(--font-mono);
	font-size: 11.5px;
	letter-spacing: 0.05em;
	color: var(--faint-on-ink);
	margin: 0;
}

.card__meta time {
	display: inline-flex;
	align-items: center;
	gap: 6px;
}

.card__meta time::before {
	content: "";
	width: 5px;
	height: 5px;
	border-radius: 50%;
	background: var(--card-accent, var(--cyan));
}

/* 无特色图占位封面 */
.cover-placeholder {
	display: block;
	width: 100%;
	height: 100%;
}

/* ---------------------------------------------------------------------------
   10. 页面头（归档 / 搜索 / 索引）
--------------------------------------------------------------------------- */
.page-head {
	padding-block: 56px 34px;
	border-bottom: 1px solid var(--line-ink);
}

.page-head__kicker {
	margin: 0 0 10px;
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.18em;
	text-transform: uppercase;
	color: var(--cyan);
	display: flex;
	align-items: center;
	gap: 10px;
}

.page-head__kicker::before {
	content: "";
	width: 22px;
	height: 2px;
	background: var(--cyan);
}

.page-head__title {
	font-size: clamp(1.7rem, 1.2rem + 1.8vw, 2.5rem);
	font-weight: 800;
	margin: 0 0 10px;
}

.page-head__desc {
	margin: 0;
	color: var(--muted-on-ink);
	max-width: 42em;
}

.page-head__count {
	margin-top: 14px;
	font-family: var(--font-mono);
	font-size: 12.5px;
	letter-spacing: 0.08em;
	color: var(--faint-on-ink);
}

/* ---------------------------------------------------------------------------
   11. 面包屑
--------------------------------------------------------------------------- */
.breadcrumbs {
	font-size: 13px;
	color: var(--faint-on-ink);
	padding-block: 18px 0;
}

.breadcrumbs__list {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 6px;
	list-style: none;
	margin: 0;
	padding: 0;
}

.breadcrumbs__list li {
	display: inline-flex;
	align-items: center;
	gap: 6px;
}

.breadcrumbs__list li + li::before {
	content: "/";
	color: var(--faint-on-ink);
	font-family: var(--font-mono);
	font-size: 11px;
}

.breadcrumbs__list a {
	color: var(--muted-on-ink);
	text-decoration: none;
	min-height: 44px;
	display: inline-flex;
	align-items: center;
}

.breadcrumbs__list a:hover {
	color: var(--cyan);
}

.breadcrumbs__list [aria-current="page"] {
	color: var(--text-on-ink);
}

/* ---------------------------------------------------------------------------
   12. 文章页（中文长文阅读栏 744px）
--------------------------------------------------------------------------- */
.article-wrap {
	padding-block: 10px 80px;
}

.article-head {
	max-width: var(--read-width);
	margin-inline: auto;
	padding-top: 26px;
}

.article-title {
	font-size: clamp(1.65rem, 1.2rem + 1.7vw, 2.35rem);
	font-weight: 800;
	line-height: 1.3;
	margin: 14px 0 16px;
}

.article-meta {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 8px 18px;
	margin: 0;
	font-size: 13.5px;
	color: var(--faint-on-ink);
}

.article-meta a {
	color: var(--muted-on-ink);
	text-decoration: none;
}

.article-meta a:hover {
	color: var(--cyan);
}

.article-meta time {
	font-family: var(--font-mono);
	font-size: 12.5px;
}

.article-cover {
	max-width: var(--read-width);
	margin: 26px auto 0;
	border-radius: var(--radius);
	overflow: hidden;
	border: 1px solid var(--line-ink);
	background: var(--ink-900);
}

.entry-content {
	max-width: var(--read-width);
	margin-inline: auto;
	padding-top: 30px;
	font-size: 17px;
	line-height: 1.85;
	color: var(--text-on-ink);
}

.entry-content > * {
	margin-bottom: 1.4em;
}

.entry-content h2 {
	font-size: 1.5rem;
	font-weight: 800;
	margin: 2em 0 0.7em;
	padding-top: 0.4em;
	border-top: 1px solid var(--line-ink);
}

.entry-content h3 {
	font-size: 1.22rem;
	font-weight: 700;
	margin: 1.8em 0 0.6em;
}

.entry-content h4 {
	font-size: 1.05rem;
	font-weight: 700;
}

.entry-content a {
	text-decoration: underline;
	text-underline-offset: 3px;
}

.entry-content ul,
.entry-content ol {
	padding-left: 1.5em;
}

.entry-content li {
	margin-bottom: 0.4em;
}

.entry-content blockquote {
	margin: 1.8em 0;
	padding: 6px 0 6px 22px;
	border-left: 3px solid var(--cyan);
	color: var(--muted-on-ink);
	font-style: normal;
	background: var(--ink-900);
	border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
	padding-right: 18px;
}

.entry-content blockquote cite {
	display: block;
	margin-top: 8px;
	font-size: 13px;
	color: var(--faint-on-ink);
	font-style: normal;
}

.entry-content code {
	font-family: var(--font-mono);
	font-size: 0.88em;
	background: var(--ink-800);
	border: 1px solid var(--line-ink);
	border-radius: 4px;
	padding: 2px 6px;
	color: var(--cyan);
	overflow-wrap: break-word;
}

.entry-content pre {
	background: var(--ink-900);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius-sm);
	padding: 18px;
	overflow-x: auto;
	font-size: 13.5px;
	line-height: 1.7;
}

.entry-content pre code {
	background: none;
	border: 0;
	padding: 0;
	color: var(--text-on-ink);
}

.entry-content table {
	width: 100%;
	border-collapse: collapse;
	font-size: 14.5px;
	margin: 1.6em 0;
}

.entry-content th,
.entry-content td {
	border: 1px solid var(--line-ink-strong);
	padding: 10px 12px;
	text-align: left;
	vertical-align: top;
}

.entry-content th {
	background: var(--ink-900);
	font-family: var(--font-mono);
	font-size: 13px;
	letter-spacing: 0.04em;
}

.entry-content img {
	border-radius: var(--radius-sm);
	border: 1px solid var(--line-ink);
}

.entry-content figure {
	margin: 1.8em 0;
}

.entry-content figcaption,
.entry-content .wp-caption-text {
	font-size: 13px;
	color: var(--faint-on-ink);
	text-align: center;
	padding: 10px 8px 0;
}

.entry-content .alignwide {
	margin-inline: -40px;
	max-width: calc(100% + 80px);
}

.entry-content .alignfull {
	margin-inline: calc(50% - 50vw);
	max-width: 100vw;
}

.entry-content .wp-block-embed iframe,
.entry-content iframe {
	max-width: 100%;
}

.entry-content hr {
	border: 0;
	border-top: 1px solid var(--line-ink-strong);
	margin: 2.4em 0;
}

.article-tags {
	max-width: var(--read-width);
	margin: 40px auto 0;
	padding-top: 22px;
	border-top: 1px solid var(--line-ink);
}

.tags-list {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	list-style: none;
	margin: 10px 0 0;
	padding: 0;
}

.tags-list a {
	font-size: 13px;
	font-family: var(--font-mono);
	color: var(--muted-on-ink);
	border: 1px solid var(--line-ink-strong);
	border-radius: 999px;
	padding: 6px 13px;
	text-decoration: none;
	min-height: 44px;
	display: inline-flex;
	align-items: center;
	transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.tags-list a::before {
	content: "#";
	color: var(--cyan);
	margin-right: 4px;
}

.tags-list a:hover {
	color: var(--cyan);
	border-color: var(--cyan);
}

/* 上下篇 */
.post-nav {
	max-width: var(--read-width);
	margin: 44px auto 0;
	display: grid;
	grid-template-columns: 1fr 1fr;
	gap: 16px;
}

.post-nav__link {
	display: flex;
	flex-direction: column;
	gap: 6px;
	padding: 18px;
	background: var(--ink-900);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius-sm);
	text-decoration: none;
	color: var(--text-on-ink);
	min-height: 44px;
	transition: border-color var(--dur-fast) var(--ease), transform var(--dur-base) var(--ease);
}

.post-nav__link:hover {
	border-color: var(--cyan);
	transform: translateY(-2px);
}

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

.post-nav__label {
	font-family: var(--font-mono);
	font-size: 11px;
	letter-spacing: 0.14em;
	text-transform: uppercase;
	color: var(--faint-on-ink);
}

.post-nav__title {
	font-size: 14.5px;
	font-weight: 700;
	line-height: 1.5;
	overflow-wrap: break-word;
}

/* 相关阅读 */
.related-posts {
	border-top: 1px solid var(--line-ink);
	margin-top: 64px;
	padding-block: 56px 0;
}

/* ---------------------------------------------------------------------------
   13. 评论
--------------------------------------------------------------------------- */
.comments-area {
	max-width: var(--read-width);
	margin: 64px auto 0;
	padding-top: 8px;
}

.comments-area .comments-title,
.comments-area .comment-reply-title {
	font-size: 1.3rem;
	font-weight: 800;
}

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

.comment-list .children {
	list-style: none;
	padding-left: 28px;
	border-left: 1px solid var(--line-ink);
}

.comment-body {
	background: var(--ink-900);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius-sm);
	padding: 20px;
	margin-bottom: 18px;
}

.comment-meta {
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	gap: 10px;
	font-size: 13px;
	margin-bottom: 10px;
}

.comment-meta .avatar {
	border-radius: 50%;
	border: 1px solid var(--line-ink-strong);
}

.comment-meta .fn {
	font-style: normal;
	font-weight: 700;
}

.comment-meta .comment-metadata {
	font-family: var(--font-mono);
	font-size: 12px;
	color: var(--faint-on-ink);
}

.comment-meta .comment-metadata a {
	color: var(--faint-on-ink);
	text-decoration: none;
}

.comment-content {
	font-size: 15px;
}

.reply {
	margin-top: 10px;
}

.reply a {
	font-family: var(--font-mono);
	font-size: 12px;
	text-decoration: none;
	color: var(--cyan);
}

.comment-form label {
	display: block;
	font-size: 14px;
	margin-bottom: 6px;
}

.comment-form input[type="text"],
.comment-form input[type="email"],
.comment-form input[type="url"],
.comment-form textarea {
	width: 100%;
	min-height: 46px;
	padding: 10px 14px;
	font-family: inherit;
	font-size: 15px;
	color: var(--text-on-ink);
	background: var(--ink-850);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius-sm);
}

.comment-form textarea {
	min-height: 140px;
}

.comment-form input:focus,
.comment-form textarea:focus {
	border-color: var(--cyan);
	outline: none;
}

.comment-form .submit {
	display: inline-flex;
	align-items: center;
	min-height: 46px;
	padding: 10px 22px;
	font-size: 15px;
	font-weight: 700;
	color: var(--ink-950);
	background: var(--cyan);
	border: 1px solid var(--cyan);
	border-radius: var(--radius-sm);
	cursor: pointer;
}

.comment-form .submit:hover {
	background: var(--cyan-strong);
}

.comment-notes,
.comment-form .logged-in-as {
	font-size: 13px;
	color: var(--faint-on-ink);
}

/* ---------------------------------------------------------------------------
   14. 分页
--------------------------------------------------------------------------- */
.pagination {
	margin-top: 48px;
}

.pagination .nav-links {
	display: flex;
	flex-wrap: wrap;
	gap: 8px;
	justify-content: center;
}

.pagination .page-numbers {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	min-width: 44px;
	min-height: 44px;
	padding: 8px 14px;
	font-family: var(--font-mono);
	font-size: 14px;
	color: var(--muted-on-ink);
	border: 1px solid var(--line-ink-strong);
	border-radius: var(--radius-sm);
	text-decoration: none;
	transition: color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.pagination .page-numbers:hover {
	color: var(--cyan);
	border-color: var(--cyan);
}

.pagination .page-numbers.current {
	color: var(--ink-950);
	background: var(--cyan);
	border-color: var(--cyan);
	font-weight: 700;
}

/* ---------------------------------------------------------------------------
   15. 空状态 / 404
--------------------------------------------------------------------------- */
.empty-note,
.no-results {
	background: var(--ink-900);
	border: 1px dashed var(--line-ink-strong);
	border-radius: var(--radius);
	padding: 34px;
	color: var(--muted-on-ink);
}

.error-404 {
	text-align: center;
	padding-block: 70px 90px;
}

.error-404__code {
	font-family: var(--font-mono);
	font-size: clamp(4rem, 2rem + 10vw, 8rem);
	font-weight: 800;
	line-height: 1;
	color: var(--cyan);
	letter-spacing: 0.02em;
	margin-bottom: 10px;
}

.error-404__title {
	font-size: clamp(1.4rem, 1.1rem + 1.2vw, 1.9rem);
	margin-bottom: 12px;
}

.error-404__text {
	color: var(--muted-on-ink);
	max-width: 34em;
	margin: 0 auto 28px;
}

.error-404 .search-form {
	max-width: 460px;
	margin: 0 auto 34px;
}

.error-404__links {
	display: flex;
	flex-wrap: wrap;
	justify-content: center;
	gap: 10px;
	list-style: none;
	margin: 0;
	padding: 0;
}

/* ---------------------------------------------------------------------------
   16. 页脚
--------------------------------------------------------------------------- */
.site-footer {
	background: var(--ink-950);
	border-top: 1px solid var(--line-ink-strong);
	padding-top: 60px;
}

.footer-brand {
	display: flex;
	align-items: center;
	gap: 14px;
	margin-bottom: 10px;
}

.footer-brand__word {
	font-size: 22px;
	font-weight: 800;
	letter-spacing: -0.02em;
	color: var(--text-on-ink);
}

.footer-tagline {
	margin: 0 0 34px;
	color: var(--muted-on-ink);
	max-width: 30em;
	font-size: 14.5px;
}

.footer-grid {
	display: grid;
	grid-template-columns: 1.4fr 1fr 1fr;
	gap: 40px;
	padding-bottom: 44px;
}

.footer-col__title {
	margin: 0 0 16px;
	font-family: var(--font-mono);
	font-size: 12px;
	letter-spacing: 0.16em;
	text-transform: uppercase;
	color: var(--faint-on-ink);
	display: flex;
	align-items: center;
	gap: 8px;
}

.footer-col__title::before {
	content: "";
	width: 14px;
	height: 2px;
	background: var(--cyan);
}

.footer-links {
	list-style: none;
	margin: 0;
	padding: 0;
	display: grid;
	gap: 2px;
}

.footer-links a {
	display: inline-flex;
	align-items: center;
	min-height: 44px;
	padding: 7px 0;
	color: var(--muted-on-ink);
	font-size: 14.5px;
	text-decoration: none;
	transition: color var(--dur-fast) var(--ease), padding var(--dur-fast) var(--ease);
}

.footer-links a:hover {
	color: var(--cyan);
	padding-left: 4px;
}

.footer-disclaimer {
	border: 1px solid var(--line-ink-strong);
	border-left: 3px solid var(--cyan);
	border-radius: var(--radius-sm);
	background: var(--ink-900);
	padding: 22px 24px;
	margin-bottom: 40px;
}

.footer-disclaimer__title {
	margin: 0 0 10px;
	font-size: 14px;
	font-weight: 800;
	display: flex;
	align-items: center;
	gap: 8px;
	color: var(--cyan);
}

.footer-disclaimer p {
	margin: 0 0 8px;
	font-size: 13.5px;
	color: var(--muted-on-ink);
	line-height: 1.8;
}

.footer-disclaimer p:last-child {
	margin-bottom: 0;
}

.footer-bottom {
	border-top: 1px solid var(--line-ink);
	padding-block: 20px;
	display: flex;
	flex-wrap: wrap;
	align-items: center;
	justify-content: space-between;
	gap: 12px;
	font-family: var(--font-mono);
	font-size: 12.5px;
	color: var(--faint-on-ink);
}

.footer-bottom__top {
	display: inline-flex;
	align-items: center;
	gap: 6px;
	color: var(--faint-on-ink);
	text-decoration: none;
	min-height: 44px;
	padding: 6px 10px;
	transition: color var(--dur-fast) var(--ease);
}

.footer-bottom__top:hover {
	color: var(--cyan);
}

/* ---------------------------------------------------------------------------
   17. 渐进增强动效（JS 启用后生效；默认内容可见）
--------------------------------------------------------------------------- */
html.js .js-reveal {
	opacity: 0;
	transform: translateY(10px);
	transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease);
}

html.js .js-reveal.is-in {
	opacity: 1;
	transform: none;
}

html.js .cards-grid .js-reveal:nth-child(2) { transition-delay: 60ms; }
html.js .cards-grid .js-reveal:nth-child(3) { transition-delay: 120ms; }
html.js .cards-grid .js-reveal:nth-child(4) { transition-delay: 180ms; }
html.js .cards-grid .js-reveal:nth-child(5) { transition-delay: 240ms; }
html.js .cards-grid .js-reveal:nth-child(6) { transition-delay: 300ms; }

/* 视口外区块：跳过渲染并声明固有尺寸，避免布局抖动 */
.xchatapp-topics,
.xchatapp-latest,
.related-posts,
.comments-area,
.site-footer {
	content-visibility: auto;
	contain-intrinsic-size: auto 900px;
}

/* ---------------------------------------------------------------------------
   18. 响应式
--------------------------------------------------------------------------- */
@media (max-width: 1024px) {
	.hero__inner {
		grid-template-columns: 1fr;
		gap: 40px;
		padding-block: 48px 44px;
	}

	.radar-panel {
		max-width: 480px;
	}

	.radar {
		max-width: 320px;
	}

	.cards-grid {
		grid-template-columns: repeat(2, 1fr);
	}

	.latest-featured {
		grid-template-columns: 1fr;
	}

	.latest-featured__cover {
		min-height: 220px;
		border-right: 0;
		border-bottom: 1px solid var(--line-ink);
	}

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

	.footer-brand-col {
		grid-column: 1 / -1;
	}

	.entry-content .alignwide {
		margin-inline: 0;
		max-width: 100%;
	}
}

@media (max-width: 860px) {
	/* 移动导航：面板化。仅 JS 启用时折叠，保证无 JS 仍可导航 */
	.site-header__lang {
		order: 4;
		width: 100%;
	}

	.site-header__lang ul {
		justify-content: flex-end;
		padding-bottom: 8px;
	}

	.nav-toggle {
		display: inline-flex;
	}

	html.js .site-nav {
		display: none;
	}

	html.js .site-nav.is-open {
		display: block;
	}

	html.js .site-nav {
		position: fixed;
		top: 68px;
		left: 0;
		right: 0;
		bottom: 0;
		z-index: 120;
		background: var(--ink-950);
		border-top: 1px solid var(--line-ink);
		overflow-y: auto;
		margin-left: 0;
		padding: 18px 20px 40px;
	}

	.site-nav__list {
		flex-direction: column;
		align-items: stretch;
		gap: 4px;
	}

	.site-nav__link {
		min-height: 48px;
		font-size: 17px;
		padding: 12px 16px;
	}

	.icon-btn__text {
		display: none;
	}

	.site-search__inner {
		flex-wrap: wrap;
	}
}

@media (max-width: 640px) {
	.container {
		padding-inline: 16px;
	}

	.site-header__inner {
		min-height: 60px;
	}

	.site-brand__note {
		display: none;
	}

	.hero__inner {
		padding-block: 40px 36px;
	}

	.hero__title {
		font-size: 1.75rem;
	}

	.hero__search {
		max-width: none;
	}

	.radar-panel {
		padding: 16px;
	}

	.radar-panel__head {
		margin-bottom: 14px;
	}

	.topic-row__link {
		grid-template-columns: 40px 40px 1fr;
		gap: 12px;
	}

	.topic-row__meta {
		grid-column: 3;
		justify-self: start;
		margin-top: -6px;
	}

	.latest-item__link {
		grid-template-columns: 34px 84px 1fr;
		gap: 12px;
	}

	.latest-item__arrow {
		display: none;
	}

	.cards-grid {
		grid-template-columns: 1fr;
	}

	.latest-featured__body {
		padding: 22px 20px;
	}

	.xchatapp-topics,
	.xchatapp-latest {
		padding-block: 52px;
	}

	.footer-grid {
		grid-template-columns: 1fr;
		gap: 28px;
	}

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

	.entry-content {
		font-size: 16px;
	}

	.entry-content .alignfull {
		margin-inline: -16px;
		max-width: calc(100% + 32px);
	}

	.search-form {
		flex-wrap: wrap;
	}

	.search-form__input {
		flex-basis: 100%;
	}

	.search-form__submit {
		flex: 1;
	}
}

/* 390px 手机重点：无横向溢出、触控 44px、标题不截断 */
@media (max-width: 390px) {
	.site-brand__word {
		font-size: 17px;
	}

	.hero__title {
		font-size: 1.6rem;
		letter-spacing: -0.01em;
	}

	.radar__blip-label {
		font-size: 10px;
		padding: 1px 6px;
	}

	.topic-row__link {
		grid-template-columns: 34px 38px 1fr;
		gap: 10px;
		padding-block: 16px;
	}

	.latest-item__link {
		grid-template-columns: 28px 72px 1fr;
		gap: 10px;
		padding-block: 12px;
	}

	.latest-item__thumb {
		border-radius: 4px;
	}

	.post-nav__title,
	.latest-item__title,
	.card__title,
	.topic-row__name {
		overflow-wrap: anywhere;
	}
}

/* ---------------------------------------------------------------------------
   19. 减弱动态效果
--------------------------------------------------------------------------- */
@media (prefers-reduced-motion: reduce) {
	html {
		scroll-behavior: auto;
	}

	*,
	*::before,
	*::after {
		animation-duration: 0.01ms !important;
		animation-iteration-count: 1 !important;
		transition-duration: 0.01ms !important;
		transition-delay: 0ms !important;
	}

	html.js .js-reveal {
		opacity: 1;
		transform: none;
		transition: none;
	}

	.radar__sweep {
		animation: none;
		opacity: 0.5;
	}

	.radar__blip-dot,
	.radar-panel__status-dot {
		animation: none;
	}
}