/* ============================================================
   base — 全局基础样式
   ============================================================ */

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #111827;
  background-color: #ffffff;
}

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

a {
  color: #3B82F6;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #1E3A8A;
}

ul, ol {
  list-style: none;
}

h1, h2, h3, h4 {
  font-weight: 700;
  line-height: 1.4;
  color: #1E3A8A;
}

h1 {
  font-size: 32px;
  margin-bottom: 16px;
}

h2 {
  font-size: 24px;
  margin-bottom: 12px;
}

h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

h4 {
  font-size: 16px;
  margin-bottom: 6px;
}

p {
  margin-bottom: 12px;
}

figure {
  margin: 0;
}

figcaption {
  font-size: 14px;
  color: #6B7280;
  text-align: center;
  margin-top: 8px;
}

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-main {
  flex: 1;
}

/* ============================================================
   layout — 全站统一布局骨架
   ============================================================ */

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid #E5E7EB;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: #1E3A8A;
}

.brand-slogan {
  font-size: 13px;
  color: #6B7280;
}

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

.site-nav .nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 15px;
  color: #374151;
  border-radius: 6px;
  border-bottom: 2px solid transparent;
}

.site-nav .nav-link:hover {
  color: #1E3A8A;
  background-color: #F3F4F6;
}

.site-nav .nav-link.is-current {
  color: #1E3A8A;
  font-weight: 600;
  border-bottom-color: #3B82F6;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #1E3A8A;
  border-radius: 2px;
}

/* 面包屑 */
.breadcrumb {
  max-width: 1200px;
  margin: 0 auto;
  padding: 16px 24px 0;
  font-size: 14px;
  color: #6B7280;
}

.breadcrumb a {
  color: #6B7280;
}

.breadcrumb a:hover {
  color: #3B82F6;
}

.breadcrumb-sep {
  margin: 0 8px;
  color: #9CA3AF;
}

.breadcrumb-current {
  color: #111827;
}

/* 内页通用 */
.inner-main {
  padding-bottom: 64px;
}

.page-header {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 8px;
}

.page-header .page-title {
  font-size: 32px;
  margin-bottom: 8px;
}

.page-header .page-description {
  font-size: 16px;
  color: #4B5563;
  max-width: 720px;
}

/* ============================================================
   components — 通用组件
   ============================================================ */

/* 按钮 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 15px;
  font-weight: 600;
  border-radius: 8px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

.btn-primary {
  background-color: #3B82F6;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #1E3A8A;
  color: #ffffff;
}

.btn-secondary {
  background-color: transparent;
  border-color: #3B82F6;
  color: #3B82F6;
}

.btn-secondary:hover {
  background-color: #3B82F6;
  color: #ffffff;
}

/* 区块标题 */
.section-header {
  margin-bottom: 24px;
}

.section-title {
  font-size: 22px;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: #6B7280;
}

.section-block {
  max-width: 1200px;
  margin: 0 auto;
  padding: 48px 24px;
}

/* 标签 */
.tag {
  display: inline-block;
  padding: 4px 10px;
  font-size: 13px;
  border-radius: 4px;
  background-color: #EFF6FF;
  color: #1E3A8A;
  border: 1px solid #BFDBFE;
}

/* ============================================================
   header / footer — 全站页头页脚
   ============================================================ */

.site-footer {
  background-color: #F9FAFB;
  border-top: 1px solid #E5E7EB;
  padding: 48px 0 24px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

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

.footer-sitename {
  font-size: 20px;
  font-weight: 700;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: #6B7280;
  max-width: 480px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  margin-bottom: 32px;
}

.footer-col-title {
  font-size: 15px;
  color: #111827;
  margin-bottom: 12px;
}

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

.footer-list a {
  font-size: 14px;
  color: #6B7280;
}

.footer-list a:hover {
  color: #3B82F6;
}

.footer-bottom {
  padding-top: 16px;
  border-top: 1px solid #E5E7EB;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: #9CA3AF;
  margin: 0;
}

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

/* 首页 hero */
.home-hero {
  background-color: #F3F4F6;
  border-bottom: 1px solid #E5E7EB;
}

.home-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px;
}

.hero-title {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 17px;
  color: #4B5563;
  margin-bottom: 24px;
}

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

.hero-figure {
  border-radius: 8px;
  overflow: hidden;
}

.hero-image {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

/* 热门作品流 */
.works-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.work-card {
  background-color: #ffffff;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.work-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.work-cover {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.work-card .work-title {
  font-size: 16px;
  padding: 12px 16px 4px;
  margin: 0;
}

.work-tag {
  display: inline-block;
  margin: 0 16px 16px;
  padding: 4px 10px;
  font-size: 13px;
  background-color: #EFF6FF;
  color: #1E3A8A;
  border-radius: 4px;
}

/* 分类标签带 */
.categories-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-link {
  display: inline-block;
  padding: 10px 20px;
  font-size: 15px;
  background-color: #EFF6FF;
  color: #1E3A8A;
  border: 1px solid #BFDBFE;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.tag-link:hover {
  background-color: #3B82F6;
  color: #ffffff;
}

/* 最近更新 */
.update-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.update-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px;
  background-color: #F9FAFB;
  border-radius: 8px;
  border: 1px solid #E5E7EB;
}

.update-thumb {
  width: 64px;
  height: 64px;
  object-fit: cover;
  border-radius: 6px;
  flex-shrink: 0;
}

.update-info {
  display: flex;
  flex-direction: column;
}

.update-date {
  font-size: 13px;
  color: #6B7280;
  margin-bottom: 4px;
}

.update-link {
  font-size: 15px;
  font-weight: 500;
}

/* 人气榜单 */
.ranking-list {
  counter-reset: rank;
}

.ranking-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid #E5E7EB;
}

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

.rank-num {
  font-size: 22px;
  font-weight: 700;
  color: #3B82F6;
  min-width: 40px;
  line-height: 1.4;
}

.rank-main {
  flex: 1;
}

.rank-title {
  font-size: 16px;
  margin-bottom: 4px;
}

.rank-reason {
  font-size: 14px;
  color: #6B7280;
  margin: 0;
}

/* 指南入口 */
.guide-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.guide-card {
  background-color: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 24px;
}

.guide-card-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.guide-card-text {
  font-size: 15px;
  color: #4B5563;
  margin-bottom: 16px;
}

.guide-link {
  font-weight: 600;
}

/* 长尾专题 */
.longtail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.topic-card {
  background-color: #ffffff;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.topic-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

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

.topic-card .topic-title {
  font-size: 18px;
  padding: 16px 16px 4px;
  margin: 0;
}

.topic-excerpt {
  font-size: 14px;
  color: #6B7280;
  padding: 0 16px;
  margin-bottom: 12px;
}

.topic-link {
  display: inline-block;
  padding: 0 16px 16px;
  font-weight: 600;
}

/* ============================================================
   pages — 分类页 categories
   ============================================================ */

.filter-tabs {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 0;
}

.filter-tabs-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.filter-tab {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  background-color: #F3F4F6;
  color: #374151;
  border: 1px solid transparent;
  border-radius: 6px;
  cursor: pointer;
}

.filter-tab:hover {
  background-color: #EFF6FF;
  color: #1E3A8A;
}

.filter-tab.is-active {
  background-color: #3B82F6;
  color: #ffffff;
  border-color: #3B82F6;
}

/* 分类网格 */
.category-grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
}

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

.category-card {
  background-color: #ffffff;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  overflow: hidden;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.category-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.category-figure {
  overflow: hidden;
}

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

.category-body {
  padding: 16px;
}

.category-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.category-desc {
  font-size: 14px;
  color: #6B7280;
  margin-bottom: 12px;
}

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

/* 代表作品 */
.category-works {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 32px;
}

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

.work-item {
  display: flex;
  gap: 16px;
  background-color: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 16px;
}

.work-figure {
  flex-shrink: 0;
}

.work-figure img {
  width: 120px;
  height: 160px;
  object-fit: cover;
  border-radius: 6px;
}

.work-info {
  flex: 1;
}

.work-info .work-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.work-info .work-desc {
  font-size: 14px;
  color: #6B7280;
  margin-bottom: 8px;
}

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

/* 分类提示 */
.category-tip {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 32px;
}

.category-tip-body {
  background-color: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 8px;
  padding: 24px;
}

.category-tip-body p {
  font-size: 15px;
  color: #1E3A8A;
  margin-bottom: 8px;
}

.category-tip-body p:last-child {
  margin-bottom: 0;
}

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

.page-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.sidebar-left .page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 40px;
  align-items: start;
}

.guide-sidebar {
  background-color: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px;
  position: sticky;
  top: 88px;
}

.sidebar-title {
  font-size: 16px;
  margin-bottom: 12px;
}

.sidebar-list li {
  margin-bottom: 8px;
}

.sidebar-list a {
  display: block;
  padding: 6px 10px;
  font-size: 14px;
  color: #374151;
  border-radius: 4px;
}

.sidebar-list a:hover {
  background-color: #EFF6FF;
  color: #1E3A8A;
}

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

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

.section-heading {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.step-number {
  font-size: 20px;
  font-weight: 700;
  color: #3B82F6;
}

.section-heading h2 {
  margin: 0;
}

.section-desc {
  font-size: 15px;
  color: #6B7280;
  margin-bottom: 20px;
}

.feature-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 24px;
}

.feature-item {
  background-color: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px;
}

.feature-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.feature-item p {
  font-size: 14px;
  color: #4B5563;
  margin: 0;
}

.guide-figure {
  margin-top: 24px;
}

.guide-figure img {
  width: 100%;
  max-height: 400px;
  object-fit: cover;
  border-radius: 8px;
}

.tip-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.tip-item {
  background-color: #ffffff;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px;
}

.tip-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.tip-item p {
  font-size: 14px;
  color: #4B5563;
  margin: 0;
}

.shelf-methods {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.method-item {
  background-color: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px;
}

.method-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.method-item p {
  font-size: 14px;
  color: #4B5563;
  margin: 0;
}

.section-note {
  margin-top: 24px;
  padding: 16px;
  background-color: #EFF6FF;
  border-radius: 8px;
  font-size: 14px;
  color: #1E3A8A;
}

.quick-tips-list {
  list-style: disc;
  padding-left: 20px;
}

.quick-tips-list li {
  font-size: 15px;
  color: #374151;
  margin-bottom: 8px;
}

.quick-tips-list a {
  font-weight: 500;
}

/* ============================================================
   pages — 恋爱推荐 romance
   ============================================================ */

.recommend-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
}

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

.recommend-item {
  display: flex;
  gap: 20px;
  background-color: #ffffff;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px;
}

.recommend-media {
  flex-shrink: 0;
}

.recommend-media img {
  width: 140px;
  height: 190px;
  object-fit: cover;
  border-radius: 6px;
}

.recommend-content {
  flex: 1;
  min-width: 0;
}

.recommend-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.recommend-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.recommend-desc {
  font-size: 15px;
  color: #4B5563;
  margin-bottom: 12px;
}

.recommend-point {
  font-size: 14px;
  color: #6B7280;
  margin: 0;
}

.recommend-point strong {
  color: #1E3A8A;
}

.viewpoint-section {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 32px;
}

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

.viewpoint-item {
  background-color: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 16px;
}

.viewpoint-title {
  font-size: 15px;
  margin-bottom: 8px;
}

.viewpoint-item p {
  font-size: 13px;
  color: #6B7280;
  margin: 0;
}

.related-links {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 32px;
}

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

.related-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  background-color: #EFF6FF;
  color: #1E3A8A;
  border-radius: 6px;
  border: 1px solid #BFDBFE;
}

.related-link:hover {
  background-color: #3B82F6;
  color: #ffffff;
}

/* ============================================================
   pages — 动作推荐 action
   ============================================================ */

.recommend-list {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px;
}

.recommend-list .work-card {
  display: flex;
  gap: 20px;
  padding: 20px;
  margin-bottom: 20px;
}

.work-card-media {
  flex-shrink: 0;
}

.work-card-media img {
  width: 140px;
  height: 190px;
  object-fit: cover;
  border-radius: 6px;
}

.work-card-body {
  flex: 1;
  min-width: 0;
}

.work-card-body .work-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.work-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
}

.work-card-body .work-desc {
  font-size: 15px;
  color: #4B5563;
  margin-bottom: 12px;
}

.work-point {
  font-size: 14px;
  color: #6B7280;
  margin: 0;
}

.work-point strong {
  color: #1E3A8A;
}

.view-points {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 32px;
}

.view-points p {
  font-size: 15px;
  color: #4B5563;
  margin-bottom: 12px;
}

.view-points p:last-child {
  margin-bottom: 0;
}

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

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

.related-links .related-list a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  background-color: #EFF6FF;
  color: #1E3A8A;
  border-radius: 6px;
}

.related-links .related-list a:hover {
  background-color: #3B82F6;
  color: #ffffff;
}

.related-links-label {
  font-size: 14px;
  color: #6B7280;
  margin-right: 12px;
}

.related-links-item {
  display: inline-block;
  margin-right: 12px;
  font-size: 14px;
}

/* ============================================================
   pages — FAQ
   ============================================================ */

.faq-layout {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 40px;
  align-items: start;
}

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

.faq-content > h2 {
  font-size: 20px;
  margin-top: 32px;
  margin-bottom: 16px;
}

.faq-content > h2:first-child {
  margin-top: 0;
}

.content-media-inline {
  margin-bottom: 24px;
}

.content-media-inline img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: 8px;
}

.faq-group {
  margin-bottom: 32px;
}

.faq-item {
  background-color: #ffffff;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: #111827;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: #3B82F6;
}

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

.faq-item p {
  padding: 0 20px 16px;
  font-size: 14px;
  color: #4B5563;
  margin: 0;
}

.feedback-note {
  background-color: #EFF6FF;
  border: 1px solid #BFDBFE;
  border-radius: 8px;
  padding: 20px;
  margin-top: 24px;
}

.feedback-note p {
  font-size: 14px;
  color: #1E3A8A;
  margin: 0;
}

.faq-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
  position: sticky;
  top: 88px;
}

.sidebar-card {
  background-color: #F9FAFB;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px;
}

.sidebar-card h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.sidebar-card p {
  font-size: 14px;
  color: #6B7280;
  margin-bottom: 12px;
}

.sidebar-card a {
  font-size: 14px;
  font-weight: 600;
}

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

.error-main {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
  text-align: center;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: #3B82F6;
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 28px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: #6B7280;
  max-width: 480px;
  margin-bottom: 8px;
}

.error-btn {
  display: inline-block;
  margin-top: 24px;
  padding: 12px 32px;
  font-size: 15px;
  font-weight: 600;
  background-color: #3B82F6;
  color: #ffffff;
  border-radius: 8px;
}

.error-btn:hover {
  background-color: #1E3A8A;
  color: #ffffff;
}

.error-help {
  max-width: 720px;
  margin: 48px auto 0;
  text-align: left;
}

.error-help-title {
  font-size: 18px;
  margin-bottom: 16px;
}

.error-help-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.error-help-list a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  background-color: #EFF6FF;
  color: #1E3A8A;
  border-radius: 6px;
}

.error-help-list a:hover {
  background-color: #3B82F6;
  color: #ffffff;
}

/* ============================================================
   responsive — 响应式
   ============================================================ */

@media (max-width: 991px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

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

  .faq-sidebar {
    position: static;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
  }
}

@media (max-width: 767px) {
  body {
    font-size: 15px;
  }

  h1 {
    font-size: 26px;
  }

  h2 {
    font-size: 20px;
  }

  .header-inner {
    height: 60px;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav .nav-list {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: #ffffff;
    border-bottom: 1px solid #E5E7EB;
    padding: 16px;
    gap: 4px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  }

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

  .site-nav .nav-link {
    padding: 12px 16px;
    font-size: 16px;
  }

  .breadcrumb {
    padding: 12px 16px 0;
  }

  .page-header {
    padding: 24px 16px 8px;
  }

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

  .section-block {
    padding: 32px 16px;
  }

  .home-hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 40px 16px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-figure {
    order: 2;
  }

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

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

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

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

  .ranking-item {
    flex-direction: row;
  }

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

  .sidebar-left .page-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .guide-sidebar {
    position: static;
    order: 2;
  }

  .guide-content {
    order: 1;
  }

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

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

  .shelf-methods {
    grid-template-columns: 1fr;
  }

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

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

  .work-item {
    flex-direction: column;
  }

  .work-figure img {
    width: 100%;
    height: auto;
    max-height: 240px;
  }

  .recommend-item {
    flex-direction: column;
  }

  .recommend-media img {
    width: 100%;
    height: auto;
    max-height: 240px;
  }

  .recommend-list .work-card {
    flex-direction: column;
  }

  .work-card-media img {
    width: 100%;
    height: auto;
    max-height: 240px;
  }

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

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

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

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

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

  .footer-inner {
    padding: 0 16px;
  }

  .footer-bottom {
    padding-top: 16px;
  }

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

@media (max-width: 480px) {
  .viewpoint-list {
    grid-template-columns: 1fr;
  }

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

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

  .hero-actions {
    flex-direction: column;
  }

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

  .work-cover {
    height: 180px;
  }

  .topic-cover {
    height: 180px;
  }
}