/* ==========================================================================
   base — 基础变量、重置、全局字体与色彩
   ========================================================================== */

:root {
  --color-bg: #f5f0e8;
  --color-surface: #ffffff;
  --color-primary: #3a5a40;
  --color-primary-light: #588157;
  --color-secondary: #dad7cd;
  --color-dark: #344e41;
  --color-text: #2d2d2d;
  --color-text-light: #5a5a5a;
  --color-border: #d8d2c7;
  --color-white: #ffffff;

  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;

  --container-width: 1200px;
  --container-padding: 24px;
  --header-height: 72px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 8px;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);

  --transition-base: 0.2s ease;
  --transition-smooth: 0.3s 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-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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-primary-light);
}

ul,
ol {
  list-style: none;
}

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

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

figure {
  margin: 0;
}

/* ==========================================================================
   layout — 全站统一骨架：页头、主容器、页脚、面包屑、页面标题区
   ========================================================================== */

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

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

.brand-link {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.5px;
}

.brand-slogan {
  font-size: 12px;
  color: var(--color-text-light);
  margin-top: 2px;
}

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

.site-nav .nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.site-nav .nav-list a:hover {
  color: var(--color-primary);
  background-color: rgba(88, 129, 87, 0.08);
}

.site-nav .nav-list a.is-current {
  color: var(--color-white);
  background-color: var(--color-primary);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  align-items: center;
  gap: 6px;
  color: var(--color-primary);
  font-size: 14px;
  min-height: 44px;
}

.nav-toggle-icon {
  display: block;
  width: 20px;
  height: 16px;
  position: relative;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  transition: transform var(--transition-base);
}

.nav-toggle-icon::before {
  top: 2px;
  box-shadow: 0 6px 0 var(--color-primary);
}

.nav-toggle-icon::after {
  bottom: 2px;
}

.site-main {
  min-height: 60vh;
}

.site-main.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px var(--container-padding) 64px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--color-border);
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

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

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

/* 页面标题区 */
.page-header {
  margin-bottom: 40px;
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
  line-height: 1.8;
}

/* 统一区块标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 24px;
  position: relative;
  padding-bottom: 12px;
}

.section-title::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 40px;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
}

/* 页脚 */
.site-footer {
  background-color: var(--color-dark);
  color: rgba(255, 255, 255, 0.85);
  padding: 48px 0 24px;
  margin-top: 0;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
}

.footer-brand .footer-slogan {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-brand .footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  max-width: 320px;
}

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

.link-group .link-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

.link-group ul li {
  margin-bottom: 8px;
}

.link-group ul a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.link-group ul a:hover {
  color: var(--color-white);
  text-decoration: underline;
}

.copyright {
  grid-column: 1 / -1;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  padding-top: 20px;
  margin-top: 12px;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
  text-align: center;
}

/* ==========================================================================
   components — 通用组件：卡片、列表、按钮、标签
   ========================================================================== */

/* 频道卡片 */
.channel-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
  display: flex;
  flex-direction: column;
}

.channel-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.channel-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

.channel-content {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.channel-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

.channel-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}

.channel-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.channel-link:hover {
  color: var(--color-primary-light);
  gap: 8px;
}

/* 文章列表 */
.news-list,
.article-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.news-item,
.article-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.news-item:hover,
.article-item:hover {
  box-shadow: var(--shadow-md);
}

.news-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.news-headline,
.article-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}

.news-headline a,
.article-title a {
  color: var(--color-dark);
}

.news-headline a:hover,
.article-title a:hover {
  color: var(--color-primary);
}

.news-summary,
.article-summary {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 4px;
}

.news-date,
.article-date {
  font-size: 13px;
  color: var(--color-text-light);
  display: inline-block;
}

/* 专题卡片 */
.topic-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.topic-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

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

.topic-content {
  padding: 20px;
}

.topic-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: rgba(88, 129, 87, 0.1);
  padding: 3px 10px;
  border-radius: 20px;
  margin-bottom: 10px;
}

.topic-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 8px;
}

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

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

.topic-summary,
.topic-excerpt {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 12px;
}

.topic-meta {
  font-size: 13px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

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

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

/* 专题推荐网格（首页） */
.topic-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

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

.topic-grid .topic-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.topic-grid .topic-title {
  padding: 0 20px;
}

.topic-grid .topic-excerpt {
  padding: 0 20px;
  flex: 1;
}

.topic-grid .topic-card::after {
  content: "";
  display: block;
  height: 20px;
}

/* 编辑推荐 */
.pick-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pick-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
  border-left: 4px solid var(--color-primary-light);
}

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

.pick-card {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.pick-title {
  font-size: 17px;
  font-weight: 600;
}

.pick-title a {
  color: var(--color-dark);
}

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

.pick-reason {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 预览列表（首页右侧） */
.preview-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.preview-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.preview-link {
  display: block;
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  line-height: 1.5;
  transition: color var(--transition-base);
}

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

.preview-title {
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 2px;
}

.preview-excerpt {
  font-size: 13px;
  color: var(--color-text-light);
  line-height: 1.5;
  margin-bottom: 6px;
}

.preview-meta {
  font-size: 12px;
  color: var(--color-text-light);
}

/* 更多链接 */
.more-link {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.more-link:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* 阅读更多 */
.read-more {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-top: 8px;
}

.read-more:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* 按钮 */
.btn-home,
.btn-channel {
  display: inline-block;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base), color var(--transition-base);
  min-height: 44px;
}

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

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

.btn-channel {
  background-color: var(--color-surface);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-channel:hover {
  background-color: rgba(88, 129, 87, 0.08);
  color: var(--color-primary);
}

/* 区块标题组 */
.section-heading {
  margin-bottom: 28px;
}

.section-heading .section-title {
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 640px;
}

/* ==========================================================================
   pages — 首页
   ========================================================================== */

.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding) 64px;
}

/* 地图式首屏 */
.map-section {
  padding: 40px 0 48px;
}

.map-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: start;
}

.channel-map {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.channel-map .section-title {
  font-size: 20px;
  margin-bottom: 20px;
}

.channel-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.channel-item {
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-base);
}

.channel-item:hover {
  background-color: rgba(88, 129, 87, 0.06);
}

.channel-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: var(--color-text);
  font-weight: 500;
  font-size: 15px;
}

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

.channel-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  background-color: rgba(88, 129, 87, 0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.channel-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
}

.channel-desc {
  font-size: 13px;
  color: var(--color-text-light);
  margin-left: auto;
  text-align: right;
}

.latest-preview {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
}

.latest-preview .section-title {
  font-size: 20px;
  margin-bottom: 20px;
}

.hero-figure {
  margin-top: 40px;
  border-radius: var(--radius-md);
  overflow: hidden;
  position: relative;
}

.hero-image {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

/* 最新动态 */
.latest-section {
  padding: 40px 0;
}

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

/* 编辑推荐 */
.editor-picks {
  padding: 40px 0;
}

/* 信息来源与反馈 */
.source-section {
  padding: 40px 0;
  background-color: rgba(218, 215, 205, 0.3);
  border-radius: var(--radius-md);
  margin-top: 40px;
}

.source-section .section-title {
  padding-left: 32px;
}

.source-text {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.8;
  padding: 0 32px 32px;
  max-width: 800px;
}

.source-text a {
  color: var(--color-primary);
  font-weight: 500;
}

.source-text a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   pages — 频道分类页
   ========================================================================== */

.channels-section {
  margin-bottom: 48px;
}

.channels-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

/* 频道内容预览 */
.preview-section {
  padding-top: 32px;
  border-top: 1px solid var(--color-border);
}

.preview-section .preview-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.preview-section .preview-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px;
  border-bottom: none;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
  display: flex;
  flex-direction: column;
}

.preview-section .preview-item:hover {
  box-shadow: var(--shadow-md);
}

.preview-section .preview-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.preview-section .preview-excerpt {
  font-size: 14px;
  margin-bottom: 12px;
  flex: 1;
}

.preview-section .preview-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.preview-section .preview-link:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* ==========================================================================
   pages — 内容专题页
   ========================================================================== */

.topics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin-bottom: 56px;
}

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

.topics-section .topic-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topics-section .topic-summary {
  flex: 1;
}

/* 专题亮点 */
.highlights-section {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 32px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 40px;
}

.highlights-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.highlight-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 16px;
  border-radius: var(--radius-sm);
  background-color: rgba(245, 240, 232, 0.5);
}

.highlight-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 700;
  flex-shrink: 0;
}

.highlight-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

.highlight-content p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.6;
  margin-bottom: 0;
}

/* 专题 CTA */
.topics-cta {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.topics-cta p {
  font-size: 15px;
  color: var(--color-text-light);
}

.topics-cta a {
  font-weight: 600;
  color: var(--color-primary);
}

.topics-cta a:hover {
  text-decoration: underline;
}

/* ==========================================================================
   pages — 深度解读页
   ========================================================================== */

.articles-section {
  margin-bottom: 48px;
}

.article-item {
  position: relative;
}

.article-item::after {
  content: "";
  position: absolute;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--color-primary-light);
  opacity: 0.4;
}

.article-item .article-title {
  padding-right: 24px;
}

.article-item .read-more {
  display: inline-block;
  margin-top: 4px;
}

/* 分析配图 */
.analysis-figure {
  margin: 48px 0;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.article-image {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.analysis-figure figcaption {
  background-color: var(--color-surface);
  padding: 12px 20px;
  font-size: 13px;
  color: var(--color-text-light);
  border: 1px solid var(--color-border);
  border-top: none;
  border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* 分析方法指南 */
.method-section {
  margin-bottom: 48px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 720px;
  margin-bottom: 24px;
}

.method-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.method-step {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  box-shadow: var(--shadow-sm);
  position: relative;
  transition: box-shadow var(--transition-base);
}

.method-step:hover {
  box-shadow: var(--shadow-md);
}

.method-step::before {
  content: attr(data-step);
  position: absolute;
  top: 16px;
  right: 20px;
  font-size: 40px;
  font-weight: 800;
  color: rgba(88, 129, 87, 0.15);
  line-height: 1;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 0;
}

/* 相关阅读 */
.related-pages {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 28px;
  box-shadow: var(--shadow-sm);
  margin-bottom: 48px;
}

.related-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 16px;
}

.related-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
}

.related-list li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.related-list a {
  font-size: 15px;
  color: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.related-list a::before {
  content: "›";
  color: var(--color-primary);
  font-weight: 700;
}

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

/* 信息来源与反馈 */
.source-feedback {
  background-color: rgba(218, 215, 205, 0.3);
  border-radius: var(--radius-md);
  padding: 28px 32px;
}

.source-feedback p {
  font-size: 14px;
  color: var(--color-text-light);
  line-height: 1.8;
  margin-bottom: 8px;
}

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

/* ==========================================================================
   pages — 阅读指南页
   ========================================================================== */

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

.guide-section:last-of-type {
  margin-bottom: 0;
}

.guide-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.guide-card {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition-base);
}

.guide-card:hover {
  box-shadow: var(--shadow-md);
}

.guide-card-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 10px;
}

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

.guide-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
}

.guide-card a:hover {
  color: var(--color-primary-light);
  text-decoration: underline;
}

/* 指南配图 */
.guide-figure {
  margin-bottom: 24px;
  border-radius: var(--radius-md);
  overflow: hidden;
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

/* 方法列表 */
.method-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.method-item {
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  padding: 20px 24px;
  box-shadow: var(--shadow-sm);
}

.method-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-dark);
  margin-bottom: 6px;
}

.method-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ==========================================================================
   pages — 404 页
   ========================================================================== */

.error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 80px var(--container-padding);
}

.error-section {
  text-align: center;
  max-width: 560px;
  margin: 0 auto;
  padding: 60px 40px;
  background-color: var(--color-surface);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.error-code {
  font-size: 72px;
  font-weight: 800;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-dark);
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text-light);
  line-height: 1.7;
  margin-bottom: 28px;
}

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

/* ==========================================================================
   responsive — 响应式断点
   ========================================================================== */

/* 平板 */
@media (max-width: 1024px) {
  .channels-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .method-steps {
    grid-template-columns: 1fr 1fr;
  }

  .method-step:last-child {
    grid-column: 1 / -1;
  }

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

  .highlight-item:last-child {
    grid-column: 1 / -1;
  }

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

  .guide-card:last-child {
    grid-column: 1 / -1;
  }

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

  .hero-image {
    aspect-ratio: 16 / 7;
  }
}

/* 手机 */
@media (max-width: 768px) {
  :root {
    --container-padding: 16px;
    --header-height: 64px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 20px;
  }

  .site-main.inner-main {
    padding: 24px 16px 48px;
  }

  .home-main {
    padding: 0 16px 48px;
  }

  .header-inner {
    gap: 12px;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-slogan {
    font-size: 11px;
  }

  /* 移动导航 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-height);
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-md);
  }

  .site-nav .nav-list {
    flex-direction: column;
    padding: 12px 16px;
    gap: 4px;
    display: none;
  }

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

  .site-nav .nav-list a {
    padding: 12px 16px;
    font-size: 16px;
    border-radius: var(--radius-sm);
  }

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

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

  /* 首页地图区 */
  .map-section {
    padding: 24px 0 32px;
  }

  .channel-map,
  .latest-preview {
    padding: 20px;
  }

  .channel-desc {
    display: none;
  }

  .channel-link {
    padding: 10px 8px;
  }

  .hero-image {
    aspect-ratio: 4 / 3;
  }

  /* 专题网格 */
  .topic-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

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

  /* 频道网格 */
  .channels-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .preview-section .preview-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  /* 方法步骤 */
  .method-steps {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .method-step:last-child {
    grid-column: auto;
  }

  /* 亮点 */
  .highlights-list {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .highlight-item:last-child {
    grid-column: auto;
  }

  /* 指南 */
  .guide-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .guide-card:last-child {
    grid-column: auto;
  }

  /* 相关阅读 */
  .related-list {
    grid-template-columns: 1fr;
  }

  /* 面包屑 */
  .breadcrumb {
    margin-bottom: 20px;
    padding-bottom: 12px;
    font-size: 13px;
  }

  /* 页面标题 */
  .page-header {
    margin-bottom: 28px;
  }

  .page-title {
    font-size: 26px;
  }

  .page-description {
    font-size: 15px;
  }

  /* 区块标题 */
  .section-title {
    font-size: 20px;
    margin-bottom: 16px;
  }

  /* 编辑推荐 */
  .pick-item {
    padding: 16px 20px;
  }

  /* 来源区 */
  .source-section {
    padding: 24px 0;
    margin-top: 24px;
  }

  .source-section .section-title {
    padding-left: 20px;
  }

  .source-text {
    padding: 0 20px 20px;
    font-size: 14px;
  }

  /* 404 */
  .error-main {
    padding: 48px 16px;
  }

  .error-section {
    padding: 40px 24px;
  }

  .error-code {
    font-size: 56px;
  }

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

  .btn-home,
  .btn-channel {
    width: 100%;
    text-align: center;
  }

  /* 分析配图 */
  .analysis-figure {
    margin: 32px 0;
  }

  .article-image {
    aspect-ratio: 4 / 3;
  }

  /* 专题亮点 */
  .highlights-section {
    padding: 20px;
  }

  /* 来源反馈 */
  .source-feedback {
    padding: 20px;
  }
}

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

  .channel-map,
  .latest-preview {
    padding: 16px;
  }

  .news-item,
  .article-item {
    padding: 16px;
  }

  .topic-content {
    padding: 16px;
  }

  .highlight-item {
    flex-direction: column;
    gap: 8px;
  }

  .highlight-icon {
    width: 36px;
    height: 36px;
    font-size: 16px;
  }
}