/* ==========================================================================
   51 吃瓜网 - 全站样式表
   数字出版风：暖白背景、深灰文字、红色点缀
   ========================================================================== */

/* ==========================================================================
   Base - 基础样式
   ========================================================================== */

:root {
  --color-bg: #f5f0e8;
  --color-bg-light: #faf7f1;
  --color-bg-white: #ffffff;
  --color-text: #2c2c2c;
  --color-text-light: #5a5a5a;
  --color-text-muted: #8a8a8a;
  --color-accent: #c0392b;
  --color-accent-dark: #a93226;
  --color-accent-light: #e74c3c;
  --color-secondary: #e67e22;
  --color-heading: #34495e;
  --color-border: #e0d8cc;
  --color-border-light: #ebe5db;

  --font-serif: Georgia, "Times New Roman", "Songti SC", "SimSun", serif;
  --font-sans: Arial, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;

  --container-width: 1200px;
  --container-padding: 24px;
  --content-width: 720px;

  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(44, 44, 44, 0.08);
  --shadow-md: 0 2px 8px rgba(44, 44, 44, 0.1);
  --shadow-lg: 0 4px 16px rgba(44, 44, 44, 0.12);

  --header-height: 72px;
  --transition-base: 0.2s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.2rem;
}

h4 {
  font-size: 1rem;
}

p {
  margin-bottom: 1em;
}

/* ==========================================================================
   Layout - 布局骨架
   ========================================================================== */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--color-bg);
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

/* 内页主容器 */
.inner-main {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 56px;
}

/* ==========================================================================
   Components - 页头
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border-light);
  box-shadow: var(--shadow-sm);
}

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

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

.brand-tagline {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  border-left: 2px solid var(--color-accent);
  padding-left: 10px;
  line-height: 1.2;
}

/* 主导航 */
.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-size: 0.95rem;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-list a:hover {
  color: var(--color-accent);
  background-color: rgba(192, 57, 43, 0.06);
}

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

.nav-list a.is-current::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-accent);
  border-radius: 1px;
}

/* 移动端导航按钮 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-icon,
.nav-toggle-icon::before,
.nav-toggle-icon::after {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 1px;
  transition: transform var(--transition-base), opacity var(--transition-base);
  content: "";
}

.nav-toggle-icon {
  position: relative;
}

.nav-toggle-icon::before {
  position: absolute;
  top: -7px;
  left: 0;
}

.nav-toggle-icon::after {
  position: absolute;
  top: 7px;
  left: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background-color: transparent;
}

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

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

/* ==========================================================================
   Components - 页脚
   ========================================================================== */

.site-footer {
  background-color: var(--color-heading);
  color: #d5dbe3;
  padding: 48px 0 0;
  margin-top: auto;
}

.footer-columns {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  color: #b8c0cc;
  font-size: 0.9rem;
  transition: color var(--transition-base);
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px var(--container-padding);
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  color: #8f9aa8;
  margin-bottom: 0;
}

.footer-site-info {
  margin-bottom: 4px;
}

/* ==========================================================================
   Components - 面包屑
   ========================================================================== */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  margin-bottom: 24px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border-light);
}

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

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

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

.breadcrumb-current {
  color: var(--color-text);
  font-weight: 600;
}

/* ==========================================================================
   Components - 页面标题区
   ========================================================================== */

.page-header {
  margin-bottom: 40px;
}

.page-title {
  font-size: 2rem;
  color: var(--color-heading);
  margin-bottom: 12px;
  line-height: 1.3;
}

.page-description {
  font-size: 1.05rem;
  color: var(--color-text-light);
  max-width: var(--content-width);
  line-height: 1.7;
}

/* ==========================================================================
   Components - 通用区块标题
   ========================================================================== */

.section-title {
  font-size: 1.4rem;
  color: var(--color-heading);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--color-accent);
  display: inline-block;
}

/* ==========================================================================
   Pages - 首页
   ========================================================================== */

.home-main {
  width: 100%;
}

/* 焦点区 */
.hero-section {
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border-light);
  padding: 48px 0;
}

.hero-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding);
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: center;
}

.hero-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.hero-media img {
  width: 100%;
  height: 360px;
  object-fit: cover;
  display: block;
}

.hero-content {
  padding: 8px 0;
}

.hero-kicker {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-accent);
  background-color: rgba(192, 57, 43, 0.08);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.hero-title {
  font-size: 1.9rem;
  line-height: 1.35;
  margin-bottom: 16px;
  color: var(--color-heading);
}

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

.hero-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 12px 24px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  transition: background-color var(--transition-base);
}

.hero-link:hover {
  background-color: var(--color-accent-dark);
  color: #ffffff;
}

.hero-link span {
  font-size: 1.1rem;
  line-height: 1;
}

/* 频道标签带 */
.channel-tags-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 0;
}

.channel-tags-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 8px;
}

.channel-tag {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-bg-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--color-text);
  transition: all var(--transition-base);
}

.channel-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background-color: rgba(192, 57, 43, 0.04);
  box-shadow: var(--shadow-sm);
}

/* 最新资讯列表 */
.latest-list-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 0;
}

.latest-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.latest-item {
  display: grid;
  grid-template-columns: 100px 1fr 300px;
  gap: 24px;
  align-items: baseline;
  padding: 24px 28px;
  border-bottom: 1px solid var(--color-border-light);
  transition: background-color var(--transition-base);
}

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

.latest-item:hover {
  background-color: var(--color-bg-light);
}

.latest-item time {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-family: var(--font-serif);
  white-space: nowrap;
}

.latest-item h3 {
  font-size: 1.1rem;
  margin: 0;
}

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

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

.item-summary {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin: 0;
  line-height: 1.6;
}

/* 专题推荐区 */
.topics-recommend-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 0;
}

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

.topic-card {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.topic-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.topic-card h3 {
  padding: 20px 24px 0;
  font-size: 1.2rem;
}

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

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

.topic-summary {
  padding: 8px 24px 24px;
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.65;
  margin: 0;
}

/* 编辑推荐 */
.editor-picks-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 0;
}

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

.editor-pick-item {
  display: grid;
  grid-template-columns: 160px 1fr auto;
  gap: 20px;
  align-items: center;
  background-color: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border-left: 3px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.editor-pick-item:hover {
  box-shadow: var(--shadow-md);
}

.pick-reason {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
  margin: 0;
  line-height: 1.5;
}

.editor-pick-item h3 {
  font-size: 1.05rem;
  margin: 0;
}

.editor-pick-item h3 a {
  color: var(--color-heading);
}

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

.pick-category {
  font-size: 0.8rem;
  color: var(--color-secondary);
  background-color: rgba(230, 126, 34, 0.1);
  padding: 4px 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
}

/* 信息来源与反馈 */
.source-feedback-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px var(--container-padding) 64px;
}

.source-feedback-section p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.7;
  max-width: var(--content-width);
}

/* ==========================================================================
   Pages - 频道分类页
   ========================================================================== */

.channel-list {
  margin-bottom: 48px;
}

.channel-list h2 {
  font-size: 1.3rem;
  margin-bottom: 24px;
  color: var(--color-heading);
}

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

.channel-card {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.channel-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.channel-card-media {
  overflow: hidden;
}

.channel-card-media img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.channel-card:hover .channel-card-media img {
  transform: scale(1.03);
}

.channel-card-body {
  padding: 24px;
}

.channel-card-body h3 {
  font-size: 1.2rem;
  margin-bottom: 8px;
}

.channel-card-body p {
  font-size: 0.92rem;
  color: var(--color-text-light);
  line-height: 1.65;
  margin-bottom: 16px;
}

.channel-card-body a {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
}

.channel-card-body a:hover {
  color: var(--color-accent-dark);
}

/* 频道内容预览 */
.channel-preview {
  margin-bottom: 48px;
}

.channel-preview h2 {
  font-size: 1.3rem;
  margin-bottom: 24px;
  color: var(--color-heading);
}

.preview-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.preview-item {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  border: 1px solid var(--color-border-light);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.preview-item:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

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

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

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

.preview-item p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 10px;
}

.preview-channel {
  display: inline-block;
  font-size: 0.78rem;
  color: var(--color-accent);
  background-color: rgba(192, 57, 43, 0.06);
  padding: 2px 10px;
  border-radius: var(--radius-sm);
}

/* 来源说明 */
.source-note {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  border-left: 3px solid var(--color-secondary);
  margin-top: 48px;
}

.source-note h2 {
  font-size: 1.1rem;
  margin-bottom: 12px;
  color: var(--color-heading);
}

.source-note p {
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 8px;
}

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

/* ==========================================================================
   Pages - 内容专题页
   ========================================================================== */

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

.topic-list .section-title {
  margin-bottom: 24px;
}

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

.topic-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 0;
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

.topic-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.topic-card-media {
  overflow: hidden;
}

.topic-card-media img {
  width: 100%;
  height: 100%;
  min-height: 200px;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.topic-card:hover .topic-card-media img {
  transform: scale(1.03);
}

.topic-card-body {
  padding: 28px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.topic-card-title {
  font-size: 1.3rem;
  margin-bottom: 12px;
  color: var(--color-heading);
}

.topic-card-summary {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 16px;
}

.topic-card-link {
  display: inline-block;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-accent);
  align-self: flex-start;
}

.topic-card-link:hover {
  color: var(--color-accent-dark);
}

/* 专题简介 */
.topic-intro {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 32px;
  border: 1px solid var(--color-border-light);
}

.topic-intro .section-title {
  margin-bottom: 16px;
}

.intro-text {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.75;
  margin-bottom: 16px;
}

.intro-text:last-child {
  margin-bottom: 0;
}

.intro-text strong {
  color: var(--color-heading);
}

/* ==========================================================================
   Pages - 实用指南页
   ========================================================================== */

/* 指南头图 */
.guide-hero-figure {
  margin-bottom: 32px;
  border-radius: var(--radius-lg);
  overflow: hidden;
  position: relative;
}

.guide-hero-figure img {
  width: 100%;
  height: 320px;
  object-fit: cover;
}

.guide-hero-figure figcaption {
  padding: 12px 20px;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  background-color: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border-light);
}

/* 章节目录 */
.article-toc {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 32px;
  border: 1px solid var(--color-border-light);
}

.article-toc h2 {
  font-size: 1.1rem;
  margin-bottom: 16px;
  color: var(--color-heading);
}

.article-toc ol {
  list-style: decimal;
  padding-left: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.article-toc ol li {
  font-size: 0.95rem;
}

.article-toc ol li a {
  color: var(--color-text);
}

.article-toc ol li a:hover {
  color: var(--color-accent);
}

/* 指南正文 */
.guide-content {
  max-width: var(--content-width);
  margin: 0 auto;
}

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

.guide-section h2 {
  font-size: 1.3rem;
  color: var(--color-heading);
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.guide-section p {
  font-size: 0.98rem;
  color: var(--color-text-light);
  line-height: 1.75;
  margin-bottom: 16px;
}

.guide-section p:last-child {
  margin-bottom: 0;
}

/* 指南来源说明 */
.guide-source-note {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  border-left: 3px solid var(--color-secondary);
  margin-top: 48px;
}

.guide-source-note h2 {
  font-size: 1rem;
  margin-bottom: 8px;
  color: var(--color-heading);
}

.guide-source-note p {
  font-size: 0.88rem;
  color: var(--color-text-light);
  line-height: 1.65;
  margin: 0;
}

/* 相关推荐 */
.related-content {
  margin-top: 48px;
  padding-top: 32px;
  border-top: 1px solid var(--color-border-light);
}

.related-content h2 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--color-heading);
}

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

.related-list li {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  border: 1px solid var(--color-border-light);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.related-list li:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.related-list li a {
  display: block;
}

.related-title {
  display: block;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
  margin-bottom: 4px;
}

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

.related-desc {
  display: block;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ==========================================================================
   Pages - 深度解读页
   ========================================================================== */

/* 导语 */
.article-lead {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  margin-bottom: 40px;
  border-left: 4px solid var(--color-accent);
  box-shadow: var(--shadow-sm);
}

.article-lead .section-title {
  margin-bottom: 12px;
}

.article-lead p {
  font-size: 1.05rem;
  color: var(--color-text);
  line-height: 1.8;
  margin: 0;
}

/* 分析区 */
.article-analysis {
  margin-bottom: 40px;
}

.article-analysis .section-title {
  margin-bottom: 24px;
}

.analysis-item {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-sm);
}

.analysis-item:last-child {
  margin-bottom: 0;
}

.analysis-item h3 {
  font-size: 1.15rem;
  color: var(--color-heading);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border-light);
}

.analysis-item p {
  font-size: 0.95rem;
  color: var(--color-text-light);
  line-height: 1.75;
  margin-bottom: 16px;
}

.analysis-item p:last-child {
  margin-bottom: 0;
}

.media-figure {
  margin-top: 16px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.media-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.media-figure figcaption {
  padding: 10px 16px;
  font-size: 0.82rem;
  color: var(--color-text-muted);
  background-color: var(--color-bg-light);
  border-bottom: 1px solid var(--color-border-light);
}

/* 结论区 */
.article-conclusion {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-lg);
  padding: 32px 36px;
  margin-bottom: 40px;
  border-left: 4px solid var(--color-secondary);
  box-shadow: var(--shadow-sm);
}

.article-conclusion .section-title {
  margin-bottom: 12px;
}

.article-conclusion p {
  font-size: 1rem;
  color: var(--color-text);
  line-height: 1.75;
  margin: 0;
}

/* 相关推荐 */
.related-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-list li {
  background-color: var(--color-bg-white);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  border: 1px solid var(--color-border-light);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.related-list li:hover {
  border-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.related-list li a {
  display: block;
  font-size: 0.95rem;
  color: var(--color-heading);
  font-weight: 600;
}

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

.related-note {
  margin-top: 24px;
  font-size: 0.9rem;
  color: var(--color-text-light);
  line-height: 1.7;
}

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

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

/* ==========================================================================
   Pages - 404 页面
   ========================================================================== */

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

.error-section {
  text-align: center;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 6rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-section h1 {
  font-size: 1.6rem;
  margin-bottom: 12px;
}

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

.btn-back-home {
  display: inline-block;
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 12px 28px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  transition: background-color var(--transition-base);
}

.btn-back-home:hover {
  background-color: var(--color-accent-dark);
  color: #ffffff;
}

.error-links {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border-light);
}

.error-links p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.error-links ul {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
}

.error-links ul a {
  font-size: 0.9rem;
  color: var(--color-text);
  padding: 6px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
}

.error-links ul a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ==========================================================================
   Responsive - 响应式
   ========================================================================== */

/* 平板 */
@media (max-width: 992px) {
  .hero-section {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .hero-media img {
    height: 300px;
  }

  .latest-item {
    grid-template-columns: 90px 1fr;
    gap: 16px;
  }

  .item-summary {
    grid-column: 1 / -1;
    grid-row: auto;
  }

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

  .pick-reason {
    order: 2;
  }

  .pick-category {
    justify-self: start;
  }

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

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

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

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

  .topic-card-media img {
    height: 220px;
  }
}

/* 手机 */
@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
    --header-height: 60px;
  }

  h1 {
    font-size: 1.6rem;
  }

  h2 {
    font-size: 1.3rem;
  }

  /* 页头 */
  .header-inner {
    gap: 12px;
  }

  .brand-tagline {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-bg-white);
    border-bottom: 1px solid var(--color-border-light);
    box-shadow: var(--shadow-md);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    gap: 4px;
  }

  .nav-list a {
    padding: 12px 16px;
    font-size: 1rem;
  }

  .nav-list a.is-current::after {
    display: none;
  }

  .nav-list a.is-current {
    background-color: rgba(192, 57, 43, 0.08);
    border-radius: var(--radius-md);
  }

  .site-nav.nav-open {
    max-height: 400px;
  }

  /* 首页 */
  .hero-section {
    padding: 32px var(--container-padding);
  }

  .hero-media img {
    height: 220px;
  }

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

  .channel-tags-section,
  .latest-list-section,
  .topics-recommend-section,
  .editor-picks-section,
  .source-feedback-section {
    padding-left: var(--container-padding);
    padding-right: var(--container-padding);
    padding-top: 36px;
  }

  .latest-item {
    grid-template-columns: 1fr;
    gap: 8px;
    padding: 20px;
  }

  .latest-item time {
    font-size: 0.8rem;
  }

  .latest-item h3 {
    font-size: 1rem;
  }

  .item-summary {
    font-size: 0.88rem;
  }

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

  .topic-card img {
    height: 180px;
  }

  .editor-pick-item {
    padding: 16px 20px;
  }

  /* 内页 */
  .inner-main {
    padding: 24px var(--container-padding) 40px;
  }

  .page-header {
    margin-bottom: 28px;
  }

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

  .page-description {
    font-size: 0.95rem;
  }

  .breadcrumb {
    margin-bottom: 16px;
    padding-bottom: 12px;
    font-size: 0.8rem;
  }

  /* 频道页 */
  .channel-card-body {
    padding: 20px;
  }

  .channel-card-media img {
    height: 160px;
  }

  .preview-item {
    padding: 16px 20px;
  }

  .source-note {
    padding: 20px 24px;
  }

  /* 专题页 */
  .topic-card-body {
    padding: 20px 24px;
  }

  .topic-card-title {
    font-size: 1.1rem;
  }

  .topic-intro {
    padding: 24px;
  }

  /* 指南页 */
  .guide-hero-figure img {
    height: 200px;
  }

  .article-toc {
    padding: 20px;
  }

  .guide-section p {
    font-size: 0.92rem;
  }

  .guide-source-note {
    padding: 20px;
  }

  /* 解读页 */
  .article-lead {
    padding: 24px;
  }

  .analysis-item {
    padding: 20px 24px;
  }

  .article-conclusion {
    padding: 24px;
  }

  .media-figure img {
    height: 180px;
  }

  /* 页脚 */
  .footer-columns {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    padding-bottom: 24px;
  }

  .footer-col h4 {
    margin-bottom: 10px;
    font-size: 0.85rem;
  }

  .footer-col ul {
    gap: 6px;
  }

  .footer-col a {
    font-size: 0.85rem;
  }

  .footer-bottom {
    padding: 16px;
  }

  /* 404 */
  .error-code {
    font-size: 4.5rem;
  }

  .error-section h1 {
    font-size: 1.3rem;
  }
}

/* 超小屏 */
@media (max-width: 480px) {
  .footer-columns {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .channel-tags-list {
    gap: 8px;
  }

  .channel-tag {
    padding: 8px 14px;
    font-size: 0.88rem;
  }

  .hero-link {
    width: 100%;
    justify-content: center;
  }

  .editor-pick-item {
    grid-template-columns: 1fr;
  }

  .pick-reason {
    font-size: 0.82rem;
  }

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

  .error-links ul a {
    display: block;
    width: 100%;
    text-align: center;
  }
}