/* ==========================================================================
   黑料吃瓜不打烊 · 全站样式表
   学术期刊风：衬线正文、无衬线标题、克制配色
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. BASE —— 基础重置、变量、字体与全局元素
   -------------------------------------------------------------------------- */
:root {
  --color-primary: #2c3e50;
  --color-primary-light: #34495e;
  --color-bg-light: #ecf0f1;
  --color-border: #bdc3c7;
  --color-accent: #e74c3c;
  --color-text: #2c3e50;
  --color-text-light: #5d6d7e;
  --color-white: #ffffff;
  --color-footer-bg: #2c3e50;
  --color-footer-text: #d5dbdb;
  --font-serif: "Georgia", "Times New Roman", "Songti SC", "SimSun", serif;
  --font-sans: "Helvetica Neue", "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --shadow-card: 0 1px 3px rgba(44, 62, 80, 0.08), 0 1px 2px rgba(44, 62, 80, 0.04);
  --transition-base: 0.2s ease;
}

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

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

body {
  font-family: var(--font-serif);
  font-size: 1rem;
  line-height: 1.75;
  color: var(--color-text);
  background-color: var(--color-white);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-sans);
  line-height: 1.4;
  color: var(--color-primary);
  font-weight: 700;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* --------------------------------------------------------------------------
   2. LAYOUT —— 全站骨架：页头、页脚、主容器、面包屑、页面标题
   -------------------------------------------------------------------------- */

/* ---- 页头 ---- */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 72px;
}

.brand-link {
  display: flex;
  flex-direction: column;
  line-height: 1.3;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.brand-slogan {
  font-size: 0.75rem;
  color: var(--color-text-light);
  font-family: var(--font-sans);
}

/* 导航 */
.site-nav {
  display: block;
}

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

.nav-item {
  position: relative;
}

.nav-link {
  display: block;
  padding: 10px 16px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav-link:hover {
  background-color: var(--color-bg-light);
  color: var(--color-primary);
}

.nav-link.is-current {
  color: var(--color-accent);
  font-weight: 600;
}

.nav-item.is-current .nav-link {
  color: var(--color-accent);
  font-weight: 600;
}

/* 移动端导航按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 8px 12px;
  cursor: pointer;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--color-primary);
}

.nav-toggle-icon {
  display: block;
  width: 16px;
  height: 2px;
  background-color: var(--color-primary);
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 16px;
  height: 2px;
  background-color: var(--color-primary);
}

.nav-toggle-icon::before {
  top: -5px;
}

.nav-toggle-icon::after {
  top: 5px;
}

.nav-toggle-text {
  font-size: 0.8125rem;
}

/* ---- 主内容区 ---- */
.site-main {
  flex: 1 0 auto;
}

/* ---- 面包屑 ---- */
.breadcrumb {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

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

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

.breadcrumb-sep {
  color: var(--color-border);
}

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

/* ---- 页面标题区 ---- */
.page-header {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 24px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  line-height: 1.3;
}

.page-description {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.7;
}

/* ---- 页脚 ---- */
.site-footer {
  background-color: var(--color-footer-bg);
  color: var(--color-footer-text);
  margin-top: 64px;
  flex-shrink: 0;
}

.footer-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.footer-brand {
  margin-bottom: 32px;
}

.footer-logo {
  font-family: var(--font-sans);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 4px;
}

.footer-tagline {
  font-size: 0.875rem;
  color: var(--color-footer-text);
  opacity: 0.8;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-group h4 {
  font-size: 0.9375rem;
  color: var(--color-white);
  margin-bottom: 16px;
  font-weight: 600;
}

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

.footer-group a {
  color: var(--color-footer-text);
  font-size: 0.875rem;
  font-family: var(--font-sans);
  line-height: 1.6;
}

.footer-group a:hover {
  color: var(--color-white);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 24px;
  font-size: 0.8125rem;
  color: var(--color-footer-text);
  opacity: 0.8;
  font-family: var(--font-sans);
}

/* --------------------------------------------------------------------------
   3. COMPONENTS —— 通用组件：按钮、卡片、列表、标签、区块标题
   -------------------------------------------------------------------------- */

/* 区块标题与说明 */
.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 8px;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background-color: var(--color-accent);
}

.section-intro {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 720px;
  line-height: 1.7;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-light);
  margin-bottom: 24px;
  line-height: 1.7;
}

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition-base), border-color var(--transition-base), color var(--transition-base);
  line-height: 1.4;
}

.btn-primary {
  background-color: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background-color: var(--color-primary-light);
  color: var(--color-white);
}

.btn-secondary {
  background-color: var(--color-bg-light);
  color: var(--color-primary);
  border-color: var(--color-border);
}

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

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.btn-outline:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* 通用卡片 */
.topic-card,
.channel-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.topic-card:hover,
.channel-card:hover {
  box-shadow: 0 4px 12px rgba(44, 62, 80, 0.12);
  border-color: var(--color-primary-light);
}

/* 相关列表 */
.related-list li {
  margin-bottom: 12px;
}

.related-list a {
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  line-height: 1.5;
  display: inline-block;
  padding-left: 16px;
  position: relative;
}

.related-list a::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 1.125rem;
  line-height: 1.2;
}

/* --------------------------------------------------------------------------
   4. PAGES —— 首页
   -------------------------------------------------------------------------- */

/* 区块间距 */
.section-spacing {
  padding: 56px 0;
  border-bottom: 1px solid var(--color-bg-light);
}

.section-spacing:last-of-type {
  border-bottom: none;
}

/* ---- 焦点报道 ---- */
.focus-report {
  background-color: var(--color-bg-light);
  padding: 64px 0;
  border-bottom: 1px solid var(--color-border);
}

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

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

.home-title {
  font-size: 2.25rem;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: 4px;
}

.lead-paragraph {
  font-size: 1.125rem;
  color: var(--color-accent);
  font-family: var(--font-sans);
  font-weight: 600;
  border-left: 3px solid var(--color-accent);
  padding-left: 16px;
  line-height: 1.6;
}

.focus-description {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  line-height: 1.8;
}

.focus-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 12px;
}

.focus-media {
  margin: 0;
}

.focus-media img {
  width: 100%;
  height: 340px;
  object-fit: cover;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 16px rgba(44, 62, 80, 0.15);
}

/* ---- 频道分类导航带 ---- */
.channel-strip {
  background-color: var(--color-white);
}

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

.channel-tags li a {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: 24px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-primary);
  transition: background-color var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.channel-tags li a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
}

/* ---- 最新资讯列表 ---- */
.latest-news {
  background-color: var(--color-bg-light);
}

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

.news-item {
  width: 100%;
}

.news-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  transition: box-shadow var(--transition-base), border-left-color var(--transition-base);
}

.news-card:hover {
  box-shadow: 0 2px 8px rgba(44, 62, 80, 0.1);
  border-left-color: var(--color-primary);
}

.news-card h3 {
  font-size: 1.125rem;
  margin-bottom: 6px;
}

.news-card h3 a {
  color: var(--color-primary);
}

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

.news-excerpt {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 8px;
}

.news-card time {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  color: var(--color-text-light);
}

/* ---- 专题推荐区 ---- */
.topics-preview {
  background-color: var(--color-white);
}

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

.topic-cards .topic-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.topic-cards .topic-card h3 {
  padding: 20px 20px 4px;
  font-size: 1.125rem;
}

.topic-cards .topic-card h3 a {
  color: var(--color-primary);
}

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

.topic-cards .topic-card p {
  padding: 0 20px 20px;
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
}

/* ---- 编辑推荐 ---- */
.editor-picks {
  background-color: var(--color-bg-light);
}

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

.pick-item {
  width: 100%;
}

.pick-entry {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  transition: box-shadow var(--transition-base);
}

.pick-entry:hover {
  box-shadow: 0 2px 8px rgba(44, 62, 80, 0.1);
}

.pick-entry h3 {
  font-size: 1.0625rem;
}

.pick-entry h3 a {
  color: var(--color-primary);
}

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

.pick-reason {
  font-size: 0.875rem;
  color: var(--color-text-light);
  line-height: 1.6;
  font-family: var(--font-sans);
  border-left: 2px solid var(--color-border);
  padding-left: 12px;
}

/* ---- 信息来源与反馈 ---- */
.source-feedback {
  background-color: var(--color-white);
}

.feedback-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.feedback-list li a {
  display: block;
  padding: 16px 20px;
  background-color: var(--color-bg-light);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--color-primary);
  text-align: center;
  transition: background-color var(--transition-base), color var(--transition-base);
}

.feedback-list li a:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   5. PAGES —— 内页：频道分类（channels）
   -------------------------------------------------------------------------- */

.channels-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
}

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

.channel-card {
  display: flex;
  flex-direction: column;
}

.channel-media img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.channel-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

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

.channel-body p {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  flex: 1;
}

.channel-link {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
}

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

/* 频道说明 */
.channels-description {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 48px;
  align-items: start;
  background-color: var(--color-bg-light);
}

.channels-description .section-title {
  grid-column: 1 / -1;
}

.description-content p {
  margin-bottom: 16px;
  line-height: 1.8;
  color: var(--color-text);
}

.channel-figure {
  margin: 0;
}

.channel-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.channel-figure figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-top: 8px;
  font-family: var(--font-sans);
}

/* 相关推荐 */
.channel-related {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.channel-related h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

/* --------------------------------------------------------------------------
   6. PAGES —— 内页：内容专题（topics）
   -------------------------------------------------------------------------- */

.topics-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
}

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

.topics-grid .topic-card {
  display: flex;
  flex-direction: column;
}

.topic-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.topic-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.topic-title {
  font-size: 1.125rem;
}

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

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

.topic-summary {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  line-height: 1.6;
  flex: 1;
}

.topic-link {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-accent);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  margin-top: 8px;
}

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

/* 专题简介 */
.topics-intro-section {
  background-color: var(--color-bg-light);
  padding: 48px 0;
}

.topics-intro-section .section-title {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

.topics-intro-content {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.topics-intro-content p {
  margin-bottom: 16px;
  line-height: 1.8;
}

/* --------------------------------------------------------------------------
   7. PAGES —— 实用指南（guide）
   -------------------------------------------------------------------------- */

.page-layout {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}

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

.guide-figure {
  margin: 0 0 32px;
}

.guide-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.guide-figure figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-top: 8px;
  font-family: var(--font-sans);
}

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

.guide-section h2 {
  font-size: 1.375rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.guide-section p {
  margin-bottom: 16px;
  line-height: 1.8;
}

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

/* 相关推荐 */
.related-links {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.related-links h2 {
  font-size: 1.25rem;
  margin-bottom: 20px;
}

/* 侧栏 */
.guide-sidebar {
  min-width: 0;
}

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

.sidebar-block h2 {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-list li {
  margin-bottom: 10px;
  padding-left: 16px;
  position: relative;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text-light);
}

.sidebar-list li::before {
  content: "·";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

/* --------------------------------------------------------------------------
   8. PAGES —— 深度解读（insight）
   -------------------------------------------------------------------------- */

.layout-shell {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 48px;
  align-items: start;
}

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

.insight-article {
  min-width: 0;
}

.article-lead {
  margin-bottom: 40px;
}

.article-lead h2 {
  font-size: 1.375rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.article-lead p {
  margin-bottom: 16px;
  line-height: 1.8;
}

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

.article-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.article-figure figcaption {
  font-size: 0.8125rem;
  color: var(--color-text-light);
  margin-top: 8px;
  font-family: var(--font-sans);
}

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

.article-section h2 {
  font-size: 1.375rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.article-section p {
  margin-bottom: 16px;
  line-height: 1.8;
}

.angle-list {
  margin: 16px 0 24px;
  padding-left: 0;
}

.angle-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 12px;
  line-height: 1.7;
}

.angle-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 8px;
  height: 8px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

/* 侧栏 */
.layout-aside {
  min-width: 0;
}

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

.aside-module h2 {
  font-size: 1.0625rem;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.aside-module p {
  font-size: 0.9375rem;
  line-height: 1.7;
  color: var(--color-text);
}

.aside-module ul {
  margin-top: 8px;
}

.aside-module ul li {
  margin-bottom: 10px;
  padding-left: 16px;
  position: relative;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  line-height: 1.5;
}

.aside-module ul li::before {
  content: "›";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-size: 1rem;
}

.aside-module ul a {
  color: var(--color-primary);
}

.aside-module ul a:hover {
  color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   9. PAGES —— 404 页面
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
}

.error-section {
  text-align: center;
  padding: 80px 24px;
  max-width: 560px;
  margin: 0 auto;
}

.error-code {
  font-family: var(--font-sans);
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 1.75rem;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 1.0625rem;
  color: var(--color-text-light);
  margin-bottom: 16px;
  line-height: 1.7;
}

.error-tip {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  margin-bottom: 32px;
  font-family: var(--font-sans);
}

.error-link {
  display: inline-block;
  padding: 12px 32px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 500;
  transition: background-color var(--transition-base);
}

.error-link:hover {
  background-color: var(--color-primary-light);
  color: var(--color-white);
}

/* --------------------------------------------------------------------------
   10. RESPONSIVE —— 响应式断点
   -------------------------------------------------------------------------- */

/* 平板 */
@media (max-width: 992px) {
  .focus-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .focus-media img {
    height: 280px;
  }

  .channels-description {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .page-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .layout-shell {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

/* 手机 */
@media (max-width: 768px) {
  .header-shell {
    flex-wrap: wrap;
    padding: 12px 16px;
    gap: 12px;
    min-height: auto;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    flex-basis: 100%;
    order: 3;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding-top: 8px;
    border-top: 1px solid var(--color-border);
  }

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

  .nav-link {
    padding: 12px 8px;
    border-radius: 0;
    border-bottom: 1px solid var(--color-bg-light);
  }

  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section-spacing {
    padding: 40px 0;
  }

  .focus-report {
    padding: 40px 0;
  }

  .home-title {
    font-size: 1.75rem;
  }

  .lead-paragraph {
    font-size: 1rem;
  }

  .focus-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .focus-actions .btn {
    text-align: center;
  }

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

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

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

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

  .page-header {
    padding: 24px 16px 20px;
  }

  .page-title {
    font-size: 1.625rem;
  }

  .breadcrumb {
    padding: 16px 16px 0;
  }

  .channels-section,
  .topics-section,
  .page-layout,
  .layout-shell {
    padding-left: 16px;
    padding-right: 16px;
  }

  .channels-description {
    padding: 32px 16px;
  }

  .channel-related {
    padding: 32px 16px 0;
  }

  .topics-intro-section .section-title {
    padding-left: 16px;
    padding-right: 16px;
  }

  .topics-intro-content {
    padding-left: 16px;
    padding-right: 16px;
  }

  .guide-figure img,
  .article-figure img {
    height: 200px;
  }

  .footer-shell {
    padding: 40px 16px 24px;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* 小屏手机 */
@media (max-width: 480px) {
  .brand-name {
    font-size: 1.125rem;
  }

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

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

  .news-card {
    padding: 16px;
  }

  .pick-entry {
    padding: 16px;
  }

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

  .section-title {
    font-size: 1.25rem;
  }

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