/* ============================================================
   黑料在线 · 全站样式表
   视觉方向：日系漫画编辑风 · 黑白线稿 · 红色小标 · 克制留白
   ============================================================ */

/* ============================================================
   1. Base — 变量 / 重置 / 全局基础
   ============================================================ */

:root {
  --color-ink: #1a1a1a;
  --color-paper: #ffffff;
  --color-accent: #e63946;
  --color-gray-bg: #f5f5f5;
  --color-gray-text: #333333;
  --color-gray-light: #e8e8e8;
  --color-gray-mid: #999999;
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-sans: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --header-height: 72px;
  --content-width: 1200px;
  --sidebar-width: 280px;
  --gap-main: 40px;
  --gap-section: 56px;
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
}

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

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

body {
  font-family: var(--font-serif);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-ink);
  background-color: var(--color-paper);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: var(--color-ink);
  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 {
  font-family: var(--font-sans);
  font-weight: 700;
  line-height: 1.4;
  color: var(--color-ink);
}

p {
  margin-bottom: 0;
}

figure {
  margin: 0;
}

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
  background: none;
}

/* 容器 */
.site-main,
.header-inner,
.footer-inner,
.layout-shell,
.page-layout {
  width: 100%;
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* 内页主内容宽度 */
.inner-main {
  width: 100%;
  max-width: var(--content-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ============================================================
   2. Layout — 全站骨架 / 侧栏布局 / 页脚
   ============================================================ */

/* ----- 页头 ----- */
.site-header {
  background-color: var(--color-paper);
  border-bottom: 3px solid var(--color-ink);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  gap: 24px;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-ink);
  color: var(--color-paper);
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 900;
  border-radius: var(--radius-sm);
  letter-spacing: 0;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 20px;
  font-weight: 800;
  letter-spacing: 0.04em;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list li {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-gray-text);
  border-bottom: 3px solid transparent;
  line-height: 1.4;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.nav-list a:hover {
  color: var(--color-ink);
  border-bottom-color: var(--color-gray-mid);
}

.nav-list a.is-current {
  color: var(--color-ink);
  font-weight: 700;
  border-bottom-color: var(--color-accent);
}

/* 汉堡按钮（默认隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  background: none;
  border: none;
}

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

/* ----- 侧栏布局（内页通用） ----- */

/* channels / insight / topics：aside 与 main 并列 */
.layout-shell.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: var(--gap-main);
  padding-top: 32px;
  padding-bottom: 56px;
  align-items: start;
}

/* guide：页面布局容器 */
.page-layout.sidebar-left {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: var(--gap-main);
  padding-top: 32px;
  padding-bottom: 56px;
  align-items: start;
}

/* 侧栏通用 */
.page-aside,
.sidebar-panel,
.topic-sidebar,
.sidebar {
  position: sticky;
  top: calc(var(--header-height) + 24px);
}

/* ----- 页脚 ----- */
.site-footer {
  background-color: var(--color-ink);
  color: var(--color-paper);
  margin-top: 0;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  padding-top: 56px;
  padding-bottom: 48px;
}

.footer-brand h3 {
  color: var(--color-paper);
  font-size: 18px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.75);
  max-width: 280px;
}

.footer-col h3 {
  color: var(--color-paper);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-col h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 24px;
  height: 2px;
  background-color: var(--color-accent);
}

.footer-col ul li {
  margin-bottom: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition-fast), padding-left var(--transition-fast);
}

.footer-col ul a:hover {
  color: var(--color-paper);
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding: 20px 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

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

/* ----- 面包屑 ----- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-gray-mid);
  margin-bottom: 16px;
  flex-wrap: wrap;
}

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

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

.breadcrumb-sep {
  color: var(--color-gray-mid);
  font-size: 12px;
}

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

/* ----- 按钮 ----- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 24px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-paper);
  border: 2px solid var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-ink);
  border-color: var(--color-ink);
  color: var(--color-paper);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-ink);
  border: 2px solid var(--color-ink);
}

.btn-outline:hover {
  background-color: var(--color-ink);
  color: var(--color-paper);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-ink);
  border: 2px solid var(--color-gray-mid);
}

.btn-secondary:hover {
  border-color: var(--color-ink);
  background-color: var(--color-ink);
  color: var(--color-paper);
}

/* ----- 页面标题区（内页统一） ----- */
.page-header {
  margin-bottom: 32px;
}

.page-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray-text);
  max-width: 720px;
}

/* ----- 区块标题与说明 ----- */
.section-title,
.section h2,
.focus-report-section h2,
.channel-nav-section h2,
.latest-news-section h2,
.topic-cards-section h2,
.editor-picks-section h2,
.source-feedback-section h2,
.channel-section h2,
.channel-intro h2,
.channel-note h2,
.topic-list-section h2,
.topic-summary-section h2,
.fact-check-section h2,
.faq-section h2,
.related-guides h2,
.source-note h2,
.insight-section h2 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
  position: relative;
  padding-left: 14px;
}

.section-title::before,
.section h2::before,
.focus-report-section h2::before,
.channel-nav-section h2::before,
.latest-news-section h2::before,
.topic-cards-section h2::before,
.editor-picks-section h2::before,
.source-feedback-section h2::before,
.channel-section h2::before,
.channel-intro h2::before,
.channel-note h2::before,
.topic-list-section h2::before,
.topic-summary-section h2::before,
.fact-check-section h2::before,
.faq-section h2::before,
.related-guides h2::before,
.source-note h2::before,
.insight-section h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 6px;
  width: 4px;
  height: 20px;
  background-color: var(--color-accent);
}

.section-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 24px;
  max-width: 720px;
}

/* ----- 图片容器通用 ----- */
figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* ============================================================
   4. Pages — 首页
   ============================================================ */

/* ----- 首屏焦点区 ----- */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--color-gray-light);
}

.hero-content {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
}

.hero-content h1 {
  font-size: 36px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
}

.hero-slogan {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-accent);
  font-family: var(--font-sans);
  margin-bottom: 16px;
}

.hero-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 24px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-media {
  display: flex;
  align-items: stretch;
}

.hero-figure {
  width: 100%;
  height: 100%;
  min-height: 280px;
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

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

/* ----- 焦点报道 ----- */
.focus-report-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--color-gray-light);
}

.focus-report-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 32px;
}

.focus-report-main {
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.focus-report-main:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.report-figure {
  width: 100%;
  height: 240px;
  overflow: hidden;
}

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

.report-body {
  padding: 24px;
}

.report-tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 12px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: rgba(230, 57, 70, 0.08);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.report-body h3 {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 12px;
}

.report-summary {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 16px;
}

.report-link {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.report-link:hover {
  color: var(--color-ink);
}

.focus-report-side {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.side-report-item {
  padding: 16px 20px;
  border-left: 3px solid var(--color-gray-light);
  background-color: var(--color-gray-bg);
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.side-report-item:hover {
  border-left-color: var(--color-accent);
  background-color: var(--color-paper);
}

.side-report-item h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
}

.side-report-item p {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-gray-text);
}

/* ----- 频道分类导航带 ----- */
.channel-nav-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--color-gray-light);
}

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

.channel-tag {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 24px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-gray-text);
  background-color: var(--color-gray-bg);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.channel-tag:hover {
  background-color: var(--color-ink);
  color: var(--color-paper);
  border-color: var(--color-ink);
}

/* ----- 最新资讯列表 ----- */
.latest-news-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--color-gray-light);
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-item {
  display: grid;
  grid-template-columns: 180px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-gray-light);
  transition: padding-left var(--transition-fast);
}

.news-item:last-child {
  border-bottom: none;
}

.news-item:hover {
  padding-left: 8px;
}

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-gray-mid);
}

.news-date {
  white-space: nowrap;
}

.news-channel {
  color: var(--color-accent);
  font-weight: 500;
}

.news-item h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.5;
  margin-bottom: 6px;
}

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

.news-summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* ----- 专题策划入口 ----- */
.topic-cards-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--color-gray-light);
}

.topic-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.topic-card {
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.topic-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.topic-figure {
  width: 100%;
  height: 200px;
  overflow: hidden;
}

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

.topic-body {
  padding: 24px;
}

.topic-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 10px;
}

.topic-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
  margin-bottom: 16px;
}

.topic-link {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.topic-link:hover {
  color: var(--color-ink);
}

/* ----- 编辑推荐 ----- */
.editor-picks-section {
  padding: 48px 0;
  border-bottom: 1px solid var(--color-gray-light);
}

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

.pick-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background-color: var(--color-gray-bg);
  border-left: 3px solid transparent;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.pick-item:hover {
  border-left-color: var(--color-accent);
  background-color: var(--color-paper);
}

.pick-index {
  font-family: var(--font-sans);
  font-size: 32px;
  font-weight: 800;
  color: var(--color-gray-mid);
  line-height: 1;
  flex-shrink: 0;
  min-width: 40px;
}

.pick-content h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

.pick-reason {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* ----- 信息来源与反馈 ----- */
.source-feedback-section {
  padding: 48px 0;
}

.source-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

.source-block {
  padding: 24px;
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-md);
  background-color: var(--color-gray-bg);
}

.source-block h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 10px;
  position: relative;
  padding-bottom: 8px;
}

.source-block h3::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-accent);
}

.source-block p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* ============================================================
   5. Pages — 频道分类（channels.html）
   ============================================================ */

.page-aside {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.aside-card {
  background-color: var(--color-gray-bg);
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-md);
  padding: 24px;
}

.aside-card h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  position: relative;
  padding-bottom: 8px;
}

.aside-card h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-accent);
}

.aside-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* 频道网格 */
.channel-section {
  margin-bottom: 48px;
}

.channel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
}

.channel-card {
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: box-shadow var(--transition-base);
}

.channel-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.channel-card-media {
  width: 100%;
  height: 140px;
  overflow: hidden;
}

.channel-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.channel-card-body {
  padding: 20px;
}

.channel-card-body h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.channel-card-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
  margin-bottom: 12px;
}

.channel-link {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.channel-link:hover {
  color: var(--color-ink);
}

/* 频道介绍 */
.channel-intro {
  margin-bottom: 48px;
}

.intro-block {
  padding: 20px 24px;
  border-left: 3px solid var(--color-gray-light);
  background-color: var(--color-gray-bg);
  margin-bottom: 16px;
  transition: border-color var(--transition-fast);
}

.intro-block:hover {
  border-left-color: var(--color-accent);
}

.intro-block h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.intro-block p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* 频道说明 */
.channel-note {
  padding: 24px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-md);
}

.channel-note p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
  margin-bottom: 12px;
}

.channel-note p:last-child {
  margin-bottom: 0;
}

.channel-note a {
  color: var(--color-accent);
  font-weight: 500;
}

.channel-note a:hover {
  color: var(--color-ink);
}

/* ============================================================
   6. Pages — 内容专题（topics.html）
   ============================================================ */

.topic-sidebar {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.sidebar-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-accent);
}

.topic-index-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.topic-index-list a {
  display: block;
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-gray-text);
  border-left: 3px solid var(--color-gray-light);
  transition: border-color var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast);
}

.topic-index-list a:hover {
  border-left-color: var(--color-accent);
  background-color: var(--color-gray-bg);
  color: var(--color-ink);
}

.sidebar-note {
  padding: 20px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-md);
}

.sidebar-note p {
  font-size: 13px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* 专题列表 */
.topic-list-section {
  margin-bottom: 48px;
}

.topic-card {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 24px;
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
  transition: box-shadow var(--transition-base);
}

.topic-card:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
}

.topic-media {
  width: 100%;
  height: 100%;
  min-height: 180px;
  overflow: hidden;
}

.topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-body {
  padding: 24px;
}

.topic-title {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 10px;
}

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

.topic-summary {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
  margin-bottom: 12px;
}

.topic-meta {
  font-family: var(--font-sans);
  font-size: 13px;
  color: var(--color-gray-mid);
  margin-bottom: 16px;
}

.topic-link {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
}

.topic-link:hover {
  color: var(--color-ink);
}

/* 专题摘要 */
.summary-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.summary-item {
  padding: 20px 24px;
  background-color: var(--color-gray-bg);
  border-left: 3px solid var(--color-gray-light);
  transition: border-color var(--transition-fast);
}

.summary-item:hover {
  border-left-color: var(--color-accent);
}

.summary-item h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 8px;
}

.summary-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
  margin-bottom: 10px;
}

.summary-item a {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
}

.summary-item a:hover {
  color: var(--color-ink);
}

/* ============================================================
   7. Pages — 深度解读（insight.html）
   ============================================================ */

.sidebar-panel {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.sidebar-section {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-list li {
  margin-bottom: 12px;
}

.sidebar-list a {
  display: block;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-gray-text);
  padding: 4px 0;
  border-bottom: 1px solid var(--color-gray-light);
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.sidebar-list a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.sidebar-list li:last-child a {
  border-bottom: none;
}

/* 文章主图 */
.article-hero-image {
  width: 100%;
  height: 320px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  margin-bottom: 24px;
  border: 1px solid var(--color-gray-light);
}

.article-hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.article-hero-image figcaption {
  font-size: 12px;
  color: var(--color-gray-mid);
  padding: 8px 12px;
  background-color: var(--color-gray-bg);
}

/* 文章正文 */
.insight-article {
  max-width: 760px;
}

.article-intro p {
  font-size: 16px;
  line-height: 1.9;
  color: var(--color-gray-text);
  margin-bottom: 20px;
}

.insight-section {
  margin-bottom: 40px;
}

.insight-section p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 16px;
}

/* 分析框架 */
.framework-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 16px;
}

.framework-item {
  padding: 20px 24px;
  border: 1px solid var(--color-gray-light);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  background-color: var(--color-gray-bg);
}

.framework-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.framework-item p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
  margin-bottom: 0;
}

/* ============================================================
   8. Pages — 实用指南（guide.html）
   ============================================================ */

/* 指南侧栏 */
.sidebar-inner {
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-md);
  padding: 24px;
}

.sidebar-inner h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.sidebar-inner h2::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 20px;
  height: 2px;
  background-color: var(--color-accent);
}

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

.sidebar-nav a {
  display: block;
  padding: 8px 12px;
  font-family: var(--font-sans);
  font-size: 14px;
  color: var(--color-gray-text);
  border-left: 3px solid transparent;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.sidebar-nav a:hover {
  border-left-color: var(--color-accent);
  background-color: var(--color-paper);
  color: var(--color-ink);
}

/* 指南正文 */
.guide-content {
  max-width: 760px;
}

.guide-content > p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 24px;
}

.guide-steps {
  margin-bottom: 48px;
}

.guide-steps h2 {
  font-size: 20px;
  font-weight: 700;
  margin: 32px 0 12px;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-ink);
}

.guide-steps p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 16px;
}

/* 事实核查 */
.fact-check-section {
  margin-bottom: 48px;
}

.fact-check-section p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 16px;
}

.check-list {
  margin: 16px 0 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.check-list li {
  padding: 16px 20px;
  background-color: var(--color-gray-bg);
  border-left: 3px solid var(--color-gray-light);
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
  transition: border-color var(--transition-fast);
}

.check-list li:hover {
  border-left-color: var(--color-accent);
}

.check-list strong {
  font-family: var(--font-sans);
  font-weight: 600;
  color: var(--color-ink);
}

/* FAQ */
.faq-section {
  margin-bottom: 48px;
}

.faq-item {
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  background-color: var(--color-paper);
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--color-ink);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 44px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform var(--transition-fast);
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* 相关指南 */
.related-guides {
  margin-bottom: 48px;
  padding: 24px;
  background-color: var(--color-gray-bg);
  border-radius: var(--radius-md);
}

.related-guides p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

.related-guides a {
  font-weight: 600;
  color: var(--color-accent);
}

.related-guides a:hover {
  color: var(--color-ink);
}

/* 来源说明 */
.source-note {
  margin-bottom: 48px;
  padding: 24px;
  border: 1px solid var(--color-gray-light);
  border-radius: var(--radius-md);
}

.source-note p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-gray-text);
}

/* 正文内图片 */
.content-media-inline {
  width: 100%;
  margin: 24px 0;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--color-gray-light);
}

.content-media-inline img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.content-media-inline figcaption {
  font-size: 12px;
  color: var(--color-gray-mid);
  padding: 8px 12px;
  background-color: var(--color-gray-bg);
}

/* ============================================================
   9. Pages — 404
   ============================================================ */

.error-main {
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

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

.error-code {
  font-family: var(--font-sans);
  font-size: 96px;
  font-weight: 900;
  line-height: 1;
  color: var(--color-ink);
  margin-bottom: 16px;
  position: relative;
  display: inline-block;
}

.error-code::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -8px;
  transform: translateX(-50%);
  width: 48px;
  height: 4px;
  background-color: var(--color-accent);
}

.error-section h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
  margin-top: 24px;
}

.error-desc {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-gray-text);
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 24px;
}

.error-tip {
  font-size: 13px;
  color: var(--color-gray-mid);
}

/* ============================================================
   10. Responsive — 响应式
   ============================================================ */

/* ----- 平板（≤1024px） ----- */
@media (max-width: 1024px) {
  :root {
    --gap-main: 28px;
    --gap-section: 40px;
  }

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

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

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

  .topic-card {
    grid-template-columns: 200px 1fr;
  }

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

/* ----- 手机（≤768px） ----- */
@media (max-width: 768px) {
  :root {
    --header-height: 60px;
  }

  .header-inner {
    height: var(--header-height);
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 汉堡按钮 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-paper);
    border-bottom: 3px solid var(--color-ink);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list a {
    padding: 14px 24px;
    border-bottom: 1px solid var(--color-gray-light);
    border-left: 3px solid transparent;
    font-size: 16px;
  }

  .nav-list a.is-current {
    border-left-color: var(--color-accent);
    border-bottom-color: var(--color-gray-light);
  }

  .nav-list li:last-child a {
    border-bottom: none;
  }

  /* 首页布局 */
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0 24px;
  }

  .hero-content h1 {
    font-size: 28px;
  }

  .hero-slogan {
    font-size: 16px;
  }

  .hero-figure {
    min-height: 220px;
  }

  .focus-report-grid {
    grid-template-columns: 1fr;
  }

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

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

  .news-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .news-meta {
    gap: 8px;
  }

  .pick-item {
    flex-direction: column;
    gap: 12px;
  }

  /* 内页布局：侧栏置于正文之后 */
  .layout-shell.sidebar-left,
  .page-layout.sidebar-left {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 24px;
  }

  .page-aside,
  .sidebar-panel,
  .topic-sidebar,
  .sidebar {
    position: static;
    order: 2;
  }

  .inner-main {
    order: 1;
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 页面标题 */
  .page-header {
    margin-bottom: 24px;
  }

  .page-title {
    font-size: 24px;
  }

  /* 频道 */
  .channel-grid {
    grid-template-columns: 1fr;
  }

  /* 专题 */
  .topic-card {
    grid-template-columns: 1fr;
  }

  .topic-media {
    height: 200px;
  }

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

  /* 深度解读 */
  .article-hero-image {
    height: 220px;
  }

  /* 指南 */
  .guide-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .guide-steps h2 {
    font-size: 18px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding-top: 40px;
    padding-left: 16px;
    padding-right: 16px;
  }

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

  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 404 */
  .error-code {
    font-size: 72px;
  }

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

  .error-actions .btn {
    width: 100%;
  }
}

/* ----- 小屏手机（≤390px） ----- */
@media (max-width: 390px) {
  .hero-actions {
    flex-direction: column;
    width: 100%;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .channel-tags {
    gap: 8px;
  }

  .channel-tag {
    padding: 6px 16px;
    font-size: 14px;
    min-height: 40px;
  }

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

  .footer-brand {
    grid-column: auto;
  }
}