/* ==========================================================================
   51漫画 - 整站样式表
   版本: 1.0
   说明: 覆盖全站所有页面共用样式与各栏目独立模块样式
   ========================================================================== */

/* ==========================================================================
   Base 基础层
   ========================================================================== */

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

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

body {
  margin: 0;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.7;
  color: #1F2937;
  background-color: #F5F7FA;
}

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

a {
  color: #3B82F6;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  margin: 0 0 0.5em;
}

h1 {
  font-size: 1.75rem;
}

h2 {
  font-size: 1.375rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin: 0 0 1em;
}

ul, ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

li {
  margin-bottom: 0.25em;
}

figure {
  margin: 0;
}

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

/* ==========================================================================
   Layout 布局层
   ========================================================================== */

.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: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 1.25rem;
  font-weight: 700;
  color: #1F2937;
  text-decoration: none;
}

.logo:hover {
  text-decoration: none;
}

.logo-mark {
  display: inline-block;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background-color: #3B82F6;
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 700;
  text-align: center;
  line-height: 28px;
  flex-shrink: 0;
}

.site-main {
  min-height: calc(100vh - 64px - 300px);
}

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 64px;
}

.home-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

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

.footer-columns {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 32px;
}

.footer-title {
  font-size: 1rem;
  font-weight: 700;
  color: #1F2937;
  margin-bottom: 12px;
}

.footer-brand {
  font-size: 1.125rem;
  font-weight: 700;
  color: #1F2937;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.6;
  margin-bottom: 0;
}

.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-links li {
  margin-bottom: 6px;
}

.footer-links a {
  font-size: 0.875rem;
  color: #4B5563;
}

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

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid #E5E7EB;
  padding-top: 20px;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.8125rem;
  color: #9CA3AF;
  margin-bottom: 0;
}

/* 面包屑 */

.breadcrumb {
  font-size: 0.8125rem;
  color: #6B7280;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
}

.breadcrumb a {
  color: #3B82F6;
}

.breadcrumb-sep {
  color: #9CA3AF;
}

.breadcrumb-current {
  color: #4B5563;
}

/* 页面标题区 */

.page-header {
  margin-bottom: 32px;
  padding-bottom: 16px;
  border-bottom: 1px solid #E5E7EB;
}

.page-title {
  font-size: 1.75rem;
  font-weight: 700;
  color: #1F2937;
  margin-bottom: 8px;
}

.page-description {
  font-size: 0.9375rem;
  color: #6B7280;
  margin-bottom: 0;
}

/* ==========================================================================
   Components 组件层
   ========================================================================== */

/* ---------- 全屏导航 ---------- */

.nav-toggle {
  display: none;
  background: none;
  border: none;
  padding: 8px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle-line {
  display: block;
  width: 22px;
  height: 2px;
  background-color: #1F2937;
  border-radius: 2px;
}

.fullscreen-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  z-index: 200;
  display: none;
  overflow-y: auto;
}

.fullscreen-nav.is-open {
  display: block;
}

.nav-panel {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 48px 48px;
  min-height: 100%;
  display: flex;
  flex-direction: column;
}

.nav-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  flex: 1;
}

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

.nav-links a {
  font-size: 1.25rem;
  font-weight: 600;
  color: #1F2937;
  padding: 8px 0;
  border-bottom: 1px solid #F3F4F6;
  text-decoration: none;
}

.nav-links a:hover {
  color: #3B82F6;
}

.nav-links a.is-current {
  color: #3B82F6;
}

.nav-genres {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.nav-genres-title {
  font-size: 0.875rem;
  font-weight: 700;
  color: #6B7280;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.nav-genres a {
  font-size: 1rem;
  color: #4B5563;
  padding: 6px 0;
  text-decoration: none;
}

.nav-genres a:hover {
  color: #3B82F6;
}

.nav-genres a.is-current {
  color: #3B82F6;
  font-weight: 600;
}

/* ---------- 封面卡 ---------- */

.genre-card {
  display: block;
  background-color: #FFFFFF;
  border-radius: 8px;
  border: 1px solid #E5E7EB;
  overflow: hidden;
  text-decoration: none;
  color: #1F2937;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.genre-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
  text-decoration: none;
}

.genre-figure {
  position: relative;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  background-color: #F3F4F6;
}

.genre-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.genre-figure figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 8px 12px;
  background-color: rgba(31, 41, 55, 0.7);
  color: #FFFFFF;
  font-size: 0.75rem;
}

.genre-info {
  padding: 12px 16px 16px;
}

.genre-name {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.genre-desc {
  font-size: 0.875rem;
  color: #6B7280;
  margin-bottom: 0;
  line-height: 1.5;
}

/* ---------- 更新卡片 ---------- */

.update-card {
  display: block;
  background-color: #FFFFFF;
  border-radius: 8px;
  border: 1px solid #E5E7EB;
  overflow: hidden;
  text-decoration: none;
  color: #1F2937;
  transition: box-shadow 0.2s ease;
  flex-shrink: 0;
  width: 180px;
}

.update-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  text-decoration: none;
}

.update-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background-color: #F3F4F6;
}

.update-meta {
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.update-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: #1F2937;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.update-chapter {
  font-size: 0.75rem;
  color: #3B82F6;
  background-color: #EFF6FF;
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
  width: fit-content;
}

.update-time {
  font-size: 0.75rem;
  color: #9CA3AF;
}

/* ---------- 榜单 ---------- */

.rank-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background-color: #F59E0B;
  color: #FFFFFF;
  font-size: 0.875rem;
  font-weight: 700;
  font-family: "SF Mono", "Consolas", "Courier New", monospace;
  flex-shrink: 0;
}

.ranking-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.ranking-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid #F3F4F6;
}

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

.rank-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1F2937;
  flex: 1;
}

.rank-link:hover {
  color: #3B82F6;
}

.rank-tag {
  font-size: 0.75rem;
  color: #6B7280;
  background-color: #F3F4F6;
  padding: 2px 8px;
  border-radius: 4px;
}

/* ---------- 区块标题 ---------- */

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
}

.section-heading h2 {
  font-size: 1.375rem;
  font-weight: 700;
  margin-bottom: 0;
}

.section-link {
  font-size: 0.875rem;
  color: #3B82F6;
}

/* ---------- 内容媒体 ---------- */

.content-media {
  margin: 24px 0;
  border-radius: 8px;
  overflow: hidden;
}

.content-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.content-media figcaption {
  padding: 8px 12px;
  font-size: 0.8125rem;
  color: #6B7280;
  background-color: #F9FAFB;
}

/* ---------- 步骤条 ---------- */

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

.path-step {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 24px;
  position: relative;
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 8px;
  background-color: #3B82F6;
  color: #FFFFFF;
  font-weight: 700;
  font-family: "SF Mono", "Consolas", "Courier New", monospace;
  font-size: 0.875rem;
  margin-bottom: 12px;
}

.step-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-desc {
  font-size: 0.875rem;
  color: #6B7280;
  line-height: 1.6;
  margin-bottom: 0;
}

.path-note {
  margin-top: 24px;
  padding: 16px 20px;
  background-color: #EFF6FF;
  border-radius: 8px;
  font-size: 0.875rem;
  color: #1E40AF;
}

.path-note p {
  margin-bottom: 0;
}

/* ---------- 反馈入口 ---------- */

.feedback-entry {
  margin-top: 48px;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 32px 24px;
}

.feedback-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.feedback-inner p {
  font-size: 0.9375rem;
  color: #6B7280;
}

/* ---------- FAQ 折叠块 ---------- */

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

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

.faq-question {
  padding: 16px 20px;
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1F2937;
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-question::after {
  content: "+";
  font-size: 1.25rem;
  font-weight: 400;
  color: #3B82F6;
  flex-shrink: 0;
}

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

.faq-answer {
  padding: 0 20px 16px;
  font-size: 0.875rem;
  color: #4B5563;
  line-height: 1.65;
}

.faq-answer p {
  margin-bottom: 0;
}

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  border-radius: 8px;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  transition: background-color 0.2s ease;
  min-height: 44px;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: #2563EB;
}

.btn-secondary {
  background-color: #FFFFFF;
  color: #1F2937;
  border: 1px solid #E5E7EB;
}

.btn-secondary:hover {
  background-color: #F9FAFB;
}

/* ==========================================================================
   Pages 页面层
   ========================================================================== */

/* ---------- 首页 ---------- */

.hero-comparison {
  padding: 48px 0 32px;
}

.hero-copy {
  margin-bottom: 32px;
}

.hero-copy h1 {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.hero-lead {
  font-size: 1rem;
  color: #6B7280;
  max-width: 640px;
}

.genre-showcase {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.content-media-primary {
  margin-top: 32px;
}

.recent-updates {
  padding: 32px 0;
}

.update-scroll {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 8px;
  scrollbar-width: thin;
}

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

.ranking-layout {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 32px;
  align-items: start;
}

.ranking-cover-wall {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.ranking-cover-wall figure {
  border-radius: 8px;
  overflow: hidden;
  position: relative;
  aspect-ratio: 4 / 3;
  background-color: #F3F4F6;
}

.ranking-cover-wall img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.ranking-cover-wall figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 6px 12px;
  background-color: rgba(31, 41, 55, 0.7);
  color: #FFFFFF;
  font-size: 0.75rem;
}

.reading-path {
  padding: 32px 0;
}

.feedback-entry {
  margin-top: 24px;
}

/* ---------- 题材分类页 ---------- */

.page-layout {
  display: grid;
  grid-template-columns: 260px 1fr;
  gap: 32px;
  align-items: start;
}

.sidebar-left .page-layout {
  grid-template-columns: 260px 1fr;
}

.genre-filter {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px;
  position: sticky;
  top: 80px;
}

.filter-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.filter-list {
  list-style: none;
  padding: 0;
  margin: 0 0 16px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.filter-list a {
  display: block;
  padding: 8px 12px;
  border-radius: 6px;
  font-size: 0.875rem;
  color: #4B5563;
  text-decoration: none;
}

.filter-list a:hover {
  background-color: #F3F4F6;
  color: #1F2937;
}

.filter-list a.is-current {
  background-color: #EFF6FF;
  color: #3B82F6;
  font-weight: 600;
}

.filter-tip {
  font-size: 0.75rem;
  color: #9CA3AF;
  margin-bottom: 0;
}

.genre-groups {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.genre-group-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.genre-group-desc {
  font-size: 0.875rem;
  color: #6B7280;
  margin-bottom: 16px;
}

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

.genre-card-cover {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  background-color: #F3F4F6;
}

.genre-card-name {
  display: block;
  padding: 10px 12px 4px;
  font-size: 0.875rem;
  font-weight: 600;
  color: #1F2937;
}

.genre-card-tag {
  display: inline-block;
  margin: 0 12px 12px;
  font-size: 0.75rem;
  color: #6B7280;
  background-color: #F3F4F6;
  padding: 2px 8px;
  border-radius: 4px;
}

.genre-more-links {
  margin-top: 8px;
  padding: 16px 20px;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
}

.genre-more-links p {
  margin-bottom: 0;
  font-size: 0.875rem;
  color: #4B5563;
}

/* ---------- 最近更新页 ---------- */

.updates-layout {
  max-width: 820px;
}

.update-group {
  margin-bottom: 40px;
}

.update-group-title {
  font-size: 1.25rem;
  font-weight: 700;
  padding-bottom: 8px;
  border-bottom: 2px solid #3B82F6;
  margin-bottom: 16px;
}

.update-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.update-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  transition: box-shadow 0.2s ease;
}

.update-item:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.update-link {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  text-decoration: none;
  color: #1F2937;
}

.update-link:hover {
  text-decoration: none;
}

.update-thumb {
  width: 52px;
  height: 68px;
  object-fit: cover;
  border-radius: 4px;
  background-color: #F3F4F6;
  flex-shrink: 0;
}

.update-info {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.update-info .update-name {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #1F2937;
}

.update-info .update-chapter {
  font-size: 0.75rem;
  color: #3B82F6;
}

.update-info .update-time {
  font-size: 0.75rem;
  color: #9CA3AF;
}

.update-note {
  margin-top: 32px;
  padding: 20px 24px;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
}

.update-note-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.update-note p {
  font-size: 0.875rem;
  color: #4B5563;
  margin-bottom: 8px;
}

/* ---------- 排行榜页 ---------- */

.overall-ranking {
  margin-bottom: 40px;
}

.overall-ranking .section-intro {
  font-size: 0.875rem;
  color: #6B7280;
  margin-bottom: 16px;
}

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

.ranking-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 12px 16px;
  transition: box-shadow 0.2s ease;
}

.ranking-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.rank-cover {
  width: 48px;
  height: 64px;
  object-fit: cover;
  border-radius: 4px;
  background-color: #F3F4F6;
  flex-shrink: 0;
}

.rank-info {
  flex: 1;
  min-width: 0;
}

.rank-title {
  font-size: 0.9375rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.genre-tag {
  font-size: 0.75rem;
  color: #6B7280;
  background-color: #F3F4F6;
  padding: 2px 8px;
  border-radius: 4px;
  display: inline-block;
}

.rank-desc {
  font-size: 0.8125rem;
  color: #6B7280;
  margin-top: 4px;
  margin-bottom: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.sub-rankings {
  margin-bottom: 40px;
}

.sub-rankings .section-intro {
  font-size: 0.875rem;
  color: #6B7280;
  margin-bottom: 16px;
}

.sub-ranking-group {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 16px 20px;
  margin-bottom: 16px;
}

.sub-ranking-group h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.sub-ranking-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.sub-ranking-list li {
  padding: 6px 0;
  border-bottom: 1px solid #F3F4F6;
}

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

.sub-ranking-list a {
  font-size: 0.875rem;
  color: #1F2937;
}

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

.sub-ranking-note {
  font-size: 0.8125rem;
  color: #6B7280;
}

.ranking-notes {
  margin-top: 32px;
  padding: 20px 24px;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
}

.ranking-notes h2 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.ranking-notes p {
  font-size: 0.875rem;
  color: #4B5563;
  margin-bottom: 8px;
}

/* ---------- 阅读说明页 ---------- */

.guide-content {
  max-width: 820px;
}

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

.guide-steps .section-intro {
  font-size: 0.875rem;
  color: #6B7280;
  margin-bottom: 24px;
}

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

.step-item {
  display: flex;
  gap: 20px;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 24px;
}

.step-item .step-number {
  flex-shrink: 0;
  margin-bottom: 0;
}

.step-body {
  flex: 1;
}

.step-body h3 {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.step-body p {
  font-size: 0.875rem;
  color: #4B5563;
  margin-bottom: 12px;
}

.step-figure {
  border-radius: 8px;
  overflow: hidden;
  margin-top: 12px;
}

.step-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: #F3F4F6;
}

.step-figure figcaption {
  padding: 6px 12px;
  font-size: 0.75rem;
  color: #6B7280;
  background-color: #F9FAFB;
}

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

.guide-tips .section-intro {
  font-size: 0.875rem;
  color: #6B7280;
  margin-bottom: 24px;
}

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

.tip-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 16px 20px;
}

.tip-item h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.tip-item p {
  font-size: 0.8125rem;
  color: #6B7280;
  margin-bottom: 0;
}

.guide-path-summary {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 20px 24px;
}

.guide-path-summary h2 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.guide-path-summary p {
  font-size: 0.875rem;
  color: #4B5563;
}

.path-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.path-list a {
  display: inline-block;
  padding: 4px 12px;
  background-color: #EFF6FF;
  color: #3B82F6;
  border-radius: 4px;
  font-size: 0.8125rem;
}

/* ---------- 常见疑问页 ---------- */

.faq-content {
  max-width: 820px;
}

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

.faq-section .section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.faq-figure {
  margin: 32px 0;
  border-radius: 8px;
  overflow: hidden;
}

.faq-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: #F3F4F6;
}

.faq-figure figcaption {
  padding: 8px 12px;
  font-size: 0.8125rem;
  color: #6B7280;
  background-color: #F9FAFB;
}

.faq-guide {
  padding: 20px 24px;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
}

.faq-guide .section-title {
  font-size: 1.125rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.faq-guide p {
  font-size: 0.875rem;
  color: #4B5563;
}

/* ---------- 版权与反馈页 ---------- */

.page-hero-media {
  margin-bottom: 32px;
  border-radius: 8px;
  overflow: hidden;
}

.page-hero-image {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: #F3F4F6;
}

.page-hero-media figcaption {
  padding: 8px 12px;
  font-size: 0.8125rem;
  color: #6B7280;
  background-color: #F9FAFB;
}

.content-section {
  max-width: 820px;
  margin-bottom: 32px;
}

.content-section .section-title {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.prose-block {
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 24px;
}

.prose-block p {
  font-size: 0.9375rem;
  color: #4B5563;
  line-height: 1.7;
}

.sub-heading {
  font-size: 1rem;
  font-weight: 700;
  margin: 16px 0 8px;
}

.info-list {
  margin: 0;
  padding-left: 1.25em;
}

.info-list li {
  font-size: 0.875rem;
  color: #4B5563;
  margin-bottom: 8px;
}

.feedback-steps {
  margin: 0;
  padding-left: 1.25em;
}

.feedback-steps li {
  font-size: 0.875rem;
  color: #4B5563;
  margin-bottom: 8px;
}

.note-text {
  font-size: 0.8125rem;
  color: #9CA3AF;
  margin-top: 16px;
}

.related-links {
  max-width: 820px;
  margin-bottom: 32px;
}

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

.related-card {
  display: block;
  background-color: #FFFFFF;
  border: 1px solid #E5E7EB;
  border-radius: 8px;
  padding: 16px 20px;
  text-decoration: none;
  color: #1F2937;
  transition: box-shadow 0.2s ease;
}

.related-card:hover {
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
  text-decoration: none;
}

.related-card h3 {
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 4px;
}

.related-card p {
  font-size: 0.8125rem;
  color: #6B7280;
  margin-bottom: 0;
}

/* ---------- 404 页 ---------- */

.error-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 80px 24px;
}

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

.error-code {
  font-size: 4rem;
  font-weight: 700;
  color: #3B82F6;
  font-family: "SF Mono", "Consolas", "Courier New", monospace;
  margin-bottom: 8px;
}

.error-title {
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 0.9375rem;
  color: #6B7280;
  margin-bottom: 24px;
}

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

/* ==========================================================================
   Responsive 响应式层
   ========================================================================== */

/* ---------- 平板 768px ---------- */

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

  .nav-toggle {
    display: flex;
  }

  .fullscreen-nav {
    display: none;
  }

  .fullscreen-nav.is-open {
    display: block;
  }

  .nav-panel {
    padding: 64px 24px 32px;
  }

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

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

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

  .hero-comparison {
    padding: 32px 0 24px;
  }

  .hero-copy h1 {
    font-size: 1.5rem;
  }

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

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

  .ranking-cover-wall {
    flex-direction: row;
    overflow-x: auto;
  }

  .ranking-cover-wall figure {
    flex-shrink: 0;
    width: 240px;
  }

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

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

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

  .genre-filter {
    position: static;
    margin-bottom: 24px;
  }

  .filter-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

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

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

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

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

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

  .step-item .step-number {
    margin-bottom: 8px;
  }
}

/* ---------- 手机 480px ---------- */

@media (max-width: 480px) {
  body {
    font-size: 0.9375rem;
  }

  h1 {
    font-size: 1.5rem;
  }

  h2 {
    font-size: 1.25rem;
  }

  .logo {
    font-size: 1.125rem;
  }

  .logo-mark {
    width: 24px;
    height: 24px;
    font-size: 0.75rem;
    line-height: 24px;
    border-radius: 6px;
  }

  .hero-copy h1 {
    font-size: 1.375rem;
  }

  .hero-lead {
    font-size: 0.875rem;
  }

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

  .update-card {
    width: 150px;
  }

  .update-card img {
    aspect-ratio: 3 / 4;
  }

  .ranking-card {
    flex-wrap: wrap;
    gap: 10px;
  }

  .rank-desc {
    white-space: normal;
    overflow: visible;
    text-overflow: clip;
  }

  .sub-ranking-group {
    padding: 12px 16px;
  }

  .step-item {
    padding: 16px;
  }

  .tip-item {
    padding: 12px 16px;
  }

  .prose-block {
    padding: 16px;
  }

  .related-card {
    padding: 12px 16px;
  }

  .footer-bottom p {
    font-size: 0.75rem;
  }

  .error-code {
    font-size: 3rem;
  }

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

  .btn {
    width: 100%;
  }

  .update-link {
    padding: 10px 12px;
    gap: 12px;
  }

  .update-thumb {
    width: 44px;
    height: 58px;
  }

  .nav-genres a {
    font-size: 0.9375rem;
  }

  .nav-links a {
    font-size: 1.125rem;
  }
}

/* ---------- 桌面端导航显示 ---------- */

@media (min-width: 769px) {
  .nav-toggle {
    display: none;
  }

  .fullscreen-nav {
    display: none;
  }

  .fullscreen-nav.is-open {
    display: block;
  }
}

/* ---------- 滚动条样式 ---------- */

.update-scroll::-webkit-scrollbar {
  height: 6px;
}

.update-scroll::-webkit-scrollbar-track {
  background: #F3F4F6;
  border-radius: 3px;
}

.update-scroll::-webkit-scrollbar-thumb {
  background: #D1D5DB;
  border-radius: 3px;
}

.update-scroll::-webkit-scrollbar-thumb:hover {
  background: #9CA3AF;
}