/* ==========================================================================
   海角吃瓜 · 整站样式表
   自然生活风：柔和清新，舒展阅读节奏
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Base —— 基础重置与全局变量
   -------------------------------------------------------------------------- */
:root {
  --color-bg: #f5f5f5;
  --color-surface: #ffffff;
  --color-text: #2c3e50;
  --color-text-light: #5a6b7b;
  --color-accent: #e74c3c;
  --color-link: #3498db;
  --color-border: #e3e8ee;
  --color-heading: #1e2a36;
  --color-muted: #7f8c99;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition-fast: 0.2s ease;
  --transition-slow: 0.35s ease;
  --header-height: 72px;
  --content-line-height: 1.7;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: var(--content-line-height);
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-heading);
  font-weight: 700;
  line-height: 1.3;
}

time {
  color: var(--color-muted);
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   2. Layout —— 全局布局骨架
   -------------------------------------------------------------------------- */
.site-header {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-logo {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-heading);
  letter-spacing: 0.01em;
}

.brand-slogan {
  font-size: 0.75rem;
  color: var(--color-muted);
  letter-spacing: 0.02em;
}

.site-nav .nav-list {
  display: flex;
  gap: 4px;
}

.site-nav .nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.site-nav .nav-list a:hover {
  color: var(--color-accent);
  background-color: rgba(231, 76, 60, 0.06);
}

.site-nav .nav-list a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  background-color: rgba(231, 76, 60, 0.08);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

/* 主体区域 */
.site-main {
  flex: 1;
  width: 100%;
}

.site-main.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-surface);
  border-top: 1px solid var(--color-border);
  margin-top: 64px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}

.footer-brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.footer-brand-desc {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  max-width: 340px;
}

.footer-nav-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 12px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.footer-links a:hover {
  color: var(--color-accent);
}

.footer-info p:last-child {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 16px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   3. Components —— 通用组件
   -------------------------------------------------------------------------- */

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 16px 0;
  font-size: 0.875rem;
  color: var(--color-muted);
}

.breadcrumb a {
  color: var(--color-link);
}

.breadcrumb a:hover {
  color: var(--color-accent);
}

.breadcrumb-sep {
  color: var(--color-border);
  font-size: 0.75rem;
}

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

/* 页面标题区 */
.page-header {
  padding: 24px 0 32px;
}

.page-title {
  font-size: 1.875rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 12px;
}

.page-description {
  font-size: 1rem;
  color: var(--color-text-light);
  max-width: 640px;
  line-height: 1.6;
}

/* 区块标题 */
.section-heading {
  margin-bottom: 24px;
}

.section-heading h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.section-heading p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
}

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.section-intro {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 640px;
}

/* 图片容器 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  font-size: 0.8125rem;
  color: var(--color-muted);
  padding: 8px 0 0;
  line-height: 1.4;
}

/* 布局外壳：主内容 + 侧栏 */
.layout-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
  padding-bottom: 48px;
}

.layout-shell.sidebar-left {
  grid-template-columns: 260px 1fr;
  align-items: start;
}

.layout-shell.sidebar-left .channel-sidebar {
  grid-column: 1;
  grid-row: 1;
}

.layout-shell.sidebar-left .channel-content {
  grid-column: 2;
  grid-row: 1;
}

/* 侧栏通用 */
.channel-sidebar,
.content-side,
.sidebar {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.aside-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   4. Pages —— 各页面模块样式
   -------------------------------------------------------------------------- */

/* =========================================================
   首页 index.html
   ========================================================= */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* 首屏焦点区 */
.hero-section {
  padding: 40px 0 48px;
}

.hero-content {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 48px;
  align-items: center;
}

.hero-text {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 16px;
}

.hero-eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  letter-spacing: 0.04em;
  margin-bottom: 4px;
}

.hero-text h1 {
  font-size: 2.25rem;
  font-weight: 800;
  color: var(--color-heading);
  line-height: 1.25;
  margin-bottom: 8px;
}

.hero-desc {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

.hero-cta {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-accent);
  color: var(--color-surface);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.hero-cta:hover {
  background-color: #c0392b;
  color: var(--color-surface);
  transform: translateY(-2px);
}

.hero-media {
  width: 100%;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.hero-media img {
  aspect-ratio: 4 / 3;
  width: 100%;
}

/* 频道导航带 */
.channels-strip {
  padding: 32px 0 40px;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.channel-tag {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  transition: all var(--transition-fast);
  min-height: 44px;
}

.channel-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: rgba(231, 76, 60, 0.04);
}

/* 最新资讯列表 */
.latest-section {
  padding: 40px 0;
}

.latest-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
}

.news-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.news-thumb {
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.news-thumb img {
  aspect-ratio: 16 / 10;
  width: 100%;
}

.news-body {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 4px 0;
}

.news-body h3 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

.news-body h3 a {
  color: var(--color-heading);
}

.news-body h3 a:hover {
  color: var(--color-accent);
}

.news-body p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 专题推荐区 */
.topics-section {
  padding: 40px 0;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.topic-card {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow var(--transition-fast), transform var(--transition-fast);
  display: flex;
  flex-direction: column;
}

.topic-card:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-3px);
}

.topic-media {
  width: 100%;
}

.topic-media img {
  aspect-ratio: 16 / 9;
  width: 100%;
}

.topic-body {
  padding: 20px 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
  flex: 1;
}

.topic-body h3 {
  font-size: 1.25rem;
  font-weight: 700;
  line-height: 1.35;
}

.topic-body h3 a {
  color: var(--color-heading);
}

.topic-body h3 a:hover {
  color: var(--color-accent);
}

.topic-body p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.topic-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: auto;
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-accent);
}

.topic-link:hover {
  text-decoration: underline;
}

/* 编辑推荐 */
.editorial-section {
  padding: 40px 0;
}

.editorial-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.editorial-item {
  display: flex;
  gap: 20px;
  align-items: flex-start;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  transition: box-shadow var(--transition-fast);
}

.editorial-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.editorial-index {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  min-width: 36px;
  padding-top: 2px;
}

.editorial-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.editorial-body h3 {
  font-size: 1.0625rem;
  font-weight: 600;
}

.editorial-body h3 a {
  color: var(--color-heading);
}

.editorial-body h3 a:hover {
  color: var(--color-accent);
}

.editorial-body p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 来源说明 */
.source-section {
  padding: 40px 0;
}

.source-content {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.source-content p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

/* =========================================================
   频道分类页 hjcg/channels.html
   ========================================================= */
.page-channels {
  /* 仅用于页面标识，不覆盖全局骨架 */
}

.channel-nav-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.channel-nav-list a {
  display: block;
  padding: 10px 14px;
  font-size: 0.9375rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast);
}

.channel-nav-list a:hover {
  background-color: rgba(52, 152, 219, 0.08);
  color: var(--color-link);
}

.sidebar-note {
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

.sidebar-note-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.sidebar-note p:last-child {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.channel-content {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.channel-section {
  scroll-margin-top: calc(var(--header-height) + 20px);
}

.channel-section h2 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 8px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.channel-desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 16px;
}

.content-media-inline {
  margin-bottom: 16px;
}

.content-media-inline img {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
}

.channel-preview-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  margin-bottom: 12px;
  transition: box-shadow var(--transition-fast);
}

.channel-preview-item:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.channel-preview-item h3 {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 6px;
}

.channel-preview-item h3 a {
  color: var(--color-heading);
}

.channel-preview-item h3 a:hover {
  color: var(--color-accent);
}

.channel-preview-item p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.channel-preview-item > a {
  font-size: 0.875rem;
  font-weight: 500;
}

.channel-note {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 28px 32px;
  margin: 48px 0;
}

.channel-note h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 12px;
}

.channel-note p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

/* =========================================================
   内容专题页 hjcg/topics.html
   ========================================================= */
.page-topics {
  /* 页面标识 */
}

.topic-list {
  padding-bottom: 48px;
}

.topic-list .topic-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  margin-bottom: 24px;
}

.topic-list .topic-media img {
  aspect-ratio: 4 / 3;
  height: 100%;
  min-height: 200px;
}

.topic-list .topic-body {
  padding: 24px 28px;
}

.topic-title {
  font-size: 1.25rem;
  font-weight: 700;
}

.topic-title a {
  color: var(--color-heading);
}

.topic-title a:hover {
  color: var(--color-accent);
}

.topic-desc {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 12px;
}

.topic-articles {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 8px;
}

.topic-articles li {
  font-size: 0.9375rem;
}

.topic-articles a {
  color: var(--color-text);
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  transition: color var(--transition-fast);
}

.topic-articles a::before {
  content: "·";
  color: var(--color-accent);
  font-weight: 700;
}

.topic-articles a:hover {
  color: var(--color-accent);
}

/* 专题概览 */
.topic-overview {
  padding: 40px 0;
}

.overview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 32px;
}

.overview-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 20px;
}

.overview-name {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 8px;
}

.overview-item p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

.related-reading {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
}

.related-title {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.related-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 10px 24px;
}

.related-links a {
  font-size: 0.9375rem;
  color: var(--color-text);
  padding: 4px 0;
  display: inline-block;
}

.related-links a:hover {
  color: var(--color-accent);
}

/* =========================================================
   实用指南页 hjcg/guide.html
   ========================================================= */
.page-guide {
  /* 页面标识 */
}

.layout-shell:not(.sidebar-left) {
  grid-template-columns: 1fr 300px;
}

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

.guide-section {
  padding: 24px 0 32px;
}

.guide-section h2 {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.guide-section > p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.7;
  margin-bottom: 16px;
}

.guide-figure {
  margin: 24px 0;
}

.guide-figure img {
  aspect-ratio: 16 / 9;
  border-radius: var(--radius-md);
}

.guide-section h3 {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-heading);
  margin: 24px 0 12px;
}

.related-posts {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-top: 16px;
}

.related-posts h2 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 16px;
}

.related-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.related-list li {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

.related-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.related-list a {
  font-size: 1rem;
  font-weight: 500;
  color: var(--color-heading);
  display: block;
  margin-bottom: 4px;
}

.related-list a:hover {
  color: var(--color-accent);
}

.related-list p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.5;
}

/* 指南侧栏 */
.content-side {
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-self: start;
}

.side-card h3 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.side-card ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.side-card ul a {
  font-size: 0.875rem;
  color: var(--color-text);
  padding: 4px 0;
  display: inline-block;
}

.side-card ul a:hover {
  color: var(--color-accent);
}

/* =========================================================
   深度解读页 hjcg/insight.html
   ========================================================= */
.page-insight {
  /* 页面标识 */
}

.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
  padding-bottom: 48px;
}

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

.insight-articles {
  padding-bottom: 40px;
}

.insight-item {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
  transition: box-shadow var(--transition-fast);
}

.insight-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.insight-media {
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.insight-media img {
  aspect-ratio: 4 / 3;
  width: 100%;
}

.insight-content {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 4px 0;
}

.insight-content h3 {
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
}

.insight-content h3 a {
  color: var(--color-heading);
}

.insight-content h3 a:hover {
  color: var(--color-accent);
}

.insight-content p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.insight-content > a {
  font-size: 0.875rem;
  font-weight: 500;
  margin-top: auto;
}

/* 分析框架 */
.analysis-framework {
  padding: 40px 0;
}

.framework-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.framework-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 24px;
}

.framework-item h3 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 10px;
}

.framework-item p {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* 深度解读侧栏 */
.sidebar {
  display: flex;
  flex-direction: column;
  gap: 32px;
  align-self: start;
}

.sidebar-block h2 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-links a {
  font-size: 0.875rem;
  color: var(--color-text);
  line-height: 1.5;
  display: inline-block;
}

.sidebar-links a:hover {
  color: var(--color-accent);
}

/* =========================================================
   404 页面
   ========================================================= */
.site-error {
  /* 页面标识 */
}

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-section {
  text-align: center;
  max-width: 560px;
}

.error-code {
  font-size: 5rem;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--color-heading);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.btn-primary {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-accent);
  color: var(--color-surface);
  font-size: 0.9375rem;
  font-weight: 600;
  border-radius: var(--radius-md);
  border: none;
  cursor: pointer;
  transition: background-color var(--transition-fast), transform var(--transition-fast);
}

.btn-primary:hover {
  background-color: #c0392b;
  color: var(--color-surface);
  transform: translateY(-2px);
}

.btn-secondary {
  display: inline-block;
  padding: 12px 28px;
  background-color: var(--color-surface);
  color: var(--color-text);
  font-size: 0.9375rem;
  font-weight: 600;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: border-color var(--transition-fast), color var(--transition-fast);
}

.btn-secondary:hover {
  border-color: var(--color-link);
  color: var(--color-link);
}

.error-tip {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   5. Responsive —— 响应式断点
   -------------------------------------------------------------------------- */

/* 平板及以下 */
@media (max-width: 1024px) {
  .hero-content {
    gap: 32px;
  }

  .hero-text h1 {
    font-size: 1.875rem;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 220px 1fr;
    gap: 24px;
  }

  .topic-list .topic-card {
    grid-template-columns: 260px 1fr;
  }

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

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

  .page-layout {
    grid-template-columns: 1fr 260px;
    gap: 24px;
  }
}

/* 手机端 */
@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    height: 64px;
  }

  .brand-name {
    font-size: 1.25rem;
  }

  .brand-slogan {
    font-size: 0.6875rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.08);
  }

  .site-nav .nav-list {
    display: none;
    flex-direction: column;
    padding: 8px 16px 16px;
    gap: 4px;
  }

  .site-nav .nav-list.is-open {
    display: flex;
  }

  .site-nav .nav-list a {
    padding: 14px 12px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }

  .site-main.inner-main {
    padding: 0 16px;
  }

  .home-main {
    padding: 0 16px;
  }

  .hero-section {
    padding: 24px 0 32px;
  }

  .hero-content {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-text {
    order: 1;
  }

  .hero-media {
    order: 2;
  }

  .hero-text h1 {
    font-size: 1.625rem;
  }

  .hero-desc {
    font-size: 1rem;
  }

  .channels-strip {
    padding: 24px 0 32px;
  }

  .channel-tags {
    gap: 8px;
  }

  .channel-tag {
    padding: 8px 16px;
    font-size: 0.875rem;
  }

  .latest-section,
  .topics-section,
  .editorial-section,
  .source-section {
    padding: 28px 0;
  }

  .news-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .news-thumb img {
    aspect-ratio: 16 / 9;
  }

  .topics-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .editorial-item {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .editorial-index {
    font-size: 1.25rem;
  }

  .source-content {
    padding: 20px;
  }

  /* 内页手机布局 */
  .layout-shell.sidebar-left {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .layout-shell.sidebar-left .channel-sidebar {
    grid-column: 1;
    grid-row: 2;
  }

  .layout-shell.sidebar-left .channel-content {
    grid-column: 1;
    grid-row: 1;
  }

  .layout-shell:not(.sidebar-left) {
    grid-template-columns: 1fr;
  }

  .content-side {
    order: 2;
    margin-top: 0;
  }

  .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .sidebar {
    order: 2;
  }

  .page-header {
    padding: 16px 0 24px;
  }

  .page-title {
    font-size: 1.5rem;
  }

  .breadcrumb {
    padding: 12px 0;
  }

  .channel-nav-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .channel-nav-list a {
    padding: 8px 14px;
    background-color: var(--color-bg);
    border-radius: 999px;
    font-size: 0.875rem;
  }

  .sidebar-note {
    margin-top: 16px;
  }

  .channel-note {
    padding: 20px;
    margin: 32px 0;
  }

  .topic-list .topic-card {
    grid-template-columns: 1fr;
  }

  .topic-list .topic-media img {
    aspect-ratio: 16 / 9;
    min-height: auto;
  }

  .topic-list .topic-body {
    padding: 20px;
  }

  .overview-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .related-links {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .insight-item {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .insight-media img {
    aspect-ratio: 16 / 9;
  }

  .framework-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .framework-item {
    padding: 20px;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 24px;
  }

  .footer-bottom {
    padding: 12px 16px;
  }

  .error-code {
    font-size: 3.5rem;
  }

  .error-title {
    font-size: 1.375rem;
  }

  .error-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }
}

/* 小屏手机 */
@media (max-width: 390px) {
  .brand-slogan {
    display: none;
  }

  .hero-text h1 {
    font-size: 1.5rem;
  }

  .section-heading h2 {
    font-size: 1.25rem;
  }

  .topic-body h3 {
    font-size: 1.125rem;
  }

  .news-body h3 {
    font-size: 1rem;
  }

  .channel-tag {
    padding: 8px 12px;
    font-size: 0.8125rem;
  }

  .related-list a {
    font-size: 0.9375rem;
  }

  .guide-section h2 {
    font-size: 1.25rem;
  }

  .guide-section h3 {
    font-size: 1rem;
  }
}