/* ============================================================
   BASE — 全站基础样式
   ============================================================ */
:root {
  --color-bg: #f5f5f5;
  --color-text: #333333;
  --color-text-secondary: #666666;
  --color-accent: #1a73e8;
  --color-accent-dark: #1558b0;
  --color-card: #ffffff;
  --color-border: #e0e0e0;
  --color-tag-bg: #f0f0f0;
  --color-tag-hover: #e3edfb;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 3px 8px rgba(0, 0, 0, 0.12);
}

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

html {
  font-size: 16px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  line-height: 1.3;
  color: var(--color-text);
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ============================================================
   LAYOUT — 全站布局骨架
   ============================================================ */
.site-header {
  background-color: var(--color-card);
  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 20px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.site-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
  min-height: 60vh;
}

.home-main {
  padding-top: 0;
}

.site-footer {
  background-color: var(--color-card);
  border-top: 1px solid var(--color-border);
  margin-top: 48px;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 20px 24px;
}

/* 统一内页宽度与间距 */
.inner-main {
  padding: 20px 20px 48px;
}

/* 面包屑 */
.breadcrumb {
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  padding: 8px 0;
}

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

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

.breadcrumb-sep {
  margin: 0 8px;
  color: #999999;
}

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

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

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--color-text);
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 720px;
  line-height: 1.6;
}

/* 通用 section 标题 */
.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 16px;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */

/* --- 品牌 Logo --- */
.brand-logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  line-height: 1.2;
}

.brand-slogan {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.2;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nav-list a:hover {
  background-color: var(--color-tag-bg);
  color: var(--color-accent);
  text-decoration: none;
}

.nav-list a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  background-color: var(--color-tag-hover);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 8px;
  border-radius: var(--radius-sm);
}

.nav-toggle-line {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* --- 页脚 --- */
.footer-inner {
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.footer-brand {
  max-width: 360px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 6px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.footer-group h3 {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 12px;
}

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

.footer-group a {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.footer-group a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.footer-copyright {
  font-size: 13px;
  color: #999999;
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
}

/* --- 图片容器 --- */
.hero-figure,
.work-figure,
.featured-card img,
.recommend-cover,
.content-media {
  background-color: var(--color-tag-bg);
  overflow: hidden;
}

.hero-figure img,
.work-figure img,
.featured-card img,
.recommend-cover img,
.content-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --- 步骤列表 --- */
.step-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin: 16px 0;
}

.step-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 16px;
  font-weight: 700;
  border-radius: 50%;
}

.step-content {
  flex: 1;
}

.step-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.step-content p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- 列表 --- */
.tip-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 16px 0;
}

.tip-list li {
  padding: 14px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.tip-list h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.tip-list p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* --- 侧栏 --- */
.sidebar-card,
.side-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 16px;
  margin-bottom: 16px;
}

.sidebar-card h2,
.sidebar-card h3,
.side-card h2 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.sidebar-links li,
.side-links li,
.quick-list li {
  margin-bottom: 8px;
}

.sidebar-links a,
.side-links a,
.quick-list a {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.sidebar-links a:hover,
.side-links a:hover,
.quick-list a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

/* --- 相关链接 --- */
.related-links {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--color-border);
}

.related-links-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.related-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.related-links ul li a {
  font-size: 14px;
  color: var(--color-text-secondary);
}

.related-links ul li a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

/* --- 布局壳 --- */
.layout-shell {
  display: grid;
  grid-template-columns: 1fr;
  gap: 32px;
}

/* ============================================================
   PAGES — 首页
   ============================================================ */

/* 最新更新时间线 */
.hero-updates {
  display: grid;
  grid-template-columns: 400px 1fr;
  gap: 32px;
  align-items: start;
  padding: 32px 0;
}

.hero-media {
  position: sticky;
  top: 88px;
}

.hero-figure {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

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

.updates-timeline {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 24px;
}

.timeline-list {
  margin: 16px 0;
}

.timeline-item {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.timeline-date {
  font-size: 14px;
  color: var(--color-text-secondary);
  padding-top: 2px;
}

.timeline-content h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.timeline-content h3 a {
  color: var(--color-text);
}

.timeline-content h3 a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.timeline-summary {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.timeline-more {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  margin-top: 8px;
}

/* 题材分类导航带 */
.categories-nav {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.category-tags {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.category-tags li a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 15px;
  font-weight: 500;
  color: var(--color-text);
  text-align: center;
  transition: border-color 0.15s ease, background-color 0.15s ease, color 0.15s ease;
}

.category-tags li a:hover {
  border-color: var(--color-accent);
  background-color: var(--color-tag-hover);
  color: var(--color-accent);
  text-decoration: none;
}

.categories-all {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
  margin-top: 8px;
}

/* 人气榜单预览 */
.rank-preview {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.rank-list {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
  margin: 16px 0;
}

.rank-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rank-number {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
}

.rank-item img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

.rank-info h3 {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.rank-reason {
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

/* 阅读指南入口 */
.guide-entry {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.guide-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 16px 0;
}

.guide-card {
  display: flex;
  gap: 16px;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: box-shadow 0.15s ease;
}

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

.guide-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  background-color: var(--color-tag-hover);
  border-radius: var(--radius-md);
  font-size: 24px;
}

.guide-card-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.guide-card-title a {
  color: var(--color-text);
}

.guide-card-title a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.guide-card-text {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* 编辑推荐预告 */
.featured-preview {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.featured-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin: 16px 0;
}

.featured-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: box-shadow 0.15s ease;
}

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

.featured-card img {
  aspect-ratio: 16 / 9;
}

.featured-info {
  padding: 16px;
}

.featured-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.featured-reason {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
  margin-bottom: 10px;
}

.featured-link {
  font-size: 14px;
  font-weight: 600;
}

/* ============================================================
   PAGES — 题材分类页
   ============================================================ */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 32px;
  align-items: start;
}

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

.category-index-section,
.representative-works-section {
  margin-bottom: 40px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.category-card {
  padding: 14px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  transition: border-color 0.15s ease;
}

.category-card:hover {
  border-color: var(--color-accent);
}

.category-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.category-name a {
  color: var(--color-text);
}

.category-name a:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.category-desc {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.5;
}

.work-group {
  margin-bottom: 32px;
  padding: 20px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.work-group-title {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}

.work-figure {
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.work-figure img {
  aspect-ratio: 16 / 9;
}

.work-figure figcaption {
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
  background-color: var(--color-tag-bg);
}

.work-reason {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.sidebar-area {
  min-width: 0;
}

/* ============================================================
   PAGES — 阅读指南页
   ============================================================ */
.sidebar-right {
  grid-template-columns: 1fr 300px;
}

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

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

.guide-section h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-section > p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.sidebar-figure {
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.sidebar-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-sm);
}

/* ============================================================
   PAGES — 编辑推荐页
   ============================================================ */
.recommendation-list {
  margin-bottom: 40px;
}

.recommend-item {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  margin-bottom: 16px;
}

.recommend-cover img {
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-sm);
}

.recommend-info h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.recommend-reason {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  margin-bottom: 8px;
}

.suitable-for {
  font-size: 14px;
  color: var(--color-accent);
  line-height: 1.5;
}

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

.reason-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 16px 0;
}

.reason-card {
  padding: 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

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

.reason-card p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

.reason-note {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.6;
  padding: 12px 16px;
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-sm);
}

/* ============================================================
   PAGES — 追更技巧页
   ============================================================ */
.content-section {
  margin-bottom: 40px;
}

.content-section h2 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 8px;
}

.content-section > p {
  font-size: 15px;
  color: var(--color-text-secondary);
  margin-bottom: 16px;
  line-height: 1.6;
}

.related-entry {
  margin: 32px 0;
  padding: 16px;
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-sm);
}

.related-entry p {
  font-size: 15px;
  line-height: 1.6;
}

.related-entry a {
  font-weight: 600;
}

.content-media-inline {
  margin: 24px 0;
  border-radius: var(--radius-sm);
}

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

.content-media-inline figcaption {
  padding: 8px 12px;
  font-size: 14px;
  color: var(--color-text-secondary);
  background-color: var(--color-tag-bg);
}

.side-panel {
  min-width: 0;
}

/* FAQ 列表 */
.faq-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  margin: 16px 0;
}

.faq-item {
  padding: 14px 16px;
  background-color: var(--color-card);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
}

.faq-item h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.faq-item p {
  font-size: 15px;
  color: var(--color-text-secondary);
  line-height: 1.6;
}

/* ============================================================
   PAGES — 404 页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 20px;
}

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

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  margin-bottom: 24px;
  line-height: 1.6;
}

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

.error-link-primary,
.error-link-secondary {
  display: inline-block;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.error-link-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.error-link-primary:hover {
  background-color: var(--color-accent-dark);
  color: #ffffff;
  text-decoration: none;
}

.error-link-secondary {
  background-color: var(--color-card);
  color: var(--color-text);
  border: 1px solid var(--color-border);
}

.error-link-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

/* ============================================================
   RESPONSIVE — 响应式
   ============================================================ */

/* 平板及以下 */
@media (max-width: 1024px) {
  .hero-updates {
    grid-template-columns: 300px 1fr;
    gap: 24px;
  }

  .rank-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .rank-item:nth-child(4),
  .rank-item:nth-child(5) {
    display: none;
  }

  .category-tags {
    grid-template-columns: repeat(4, 1fr);
  }

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

  .sidebar-right {
    grid-template-columns: 1fr;
  }

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

/* 手机断点 */
@media (max-width: 768px) {
  .header-inner {
    height: 56px;
    padding: 0 16px;
  }

  .brand-slogan {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-list {
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-border);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px;
    display: none;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.08);
  }

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

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

  .site-nav {
    position: relative;
  }

  .home-main {
    padding: 0 0 32px;
  }

  .hero-updates {
    grid-template-columns: 1fr;
    padding: 20px 0;
  }

  .hero-media {
    position: static;
  }

  .hero-figure img {
    aspect-ratio: 16 / 9;
  }

  .updates-timeline {
    padding: 16px;
  }

  .timeline-item {
    grid-template-columns: 64px 1fr;
    gap: 12px;
  }

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

  .rank-list {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .rank-item:nth-child(4),
  .rank-item:nth-child(5) {
    display: flex;
  }

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

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

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

  .section-title {
    font-size: 20px;
  }

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

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

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

  .recommend-cover img {
    aspect-ratio: 16 / 9;
    max-width: 200px;
  }

  .sidebar-area,
  .sidebar,
  .side-panel {
    grid-template-columns: 1fr;
  }

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

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

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

  .error-link-primary,
  .error-link-secondary {
    min-width: 200px;
    text-align: center;
  }
}

/* 小屏手机 */
@media (max-width: 390px) {
  .header-inner {
    padding: 0 12px;
    gap: 12px;
  }

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

  .site-main,
  .inner-main {
    padding-left: 12px;
    padding-right: 12px;
  }

  .timeline-item {
    grid-template-columns: 56px 1fr;
    gap: 8px;
  }

  .timeline-date {
    font-size: 13px;
  }

  .category-tags {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  .category-tags li a {
    padding: 10px 12px;
    font-size: 14px;
  }

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

  .rank-item {
    flex-direction: row;
    align-items: center;
  }

  .rank-item img {
    width: 80px;
    aspect-ratio: 3 / 4;
    flex-shrink: 0;
  }

  .rank-info {
    flex: 1;
  }

  .footer-links {
    grid-template-columns: 1fr;
    gap: 20px;
  }
}