/* ============================================================
   西瓜漫画 · 全站样式表
   视觉母题：漫画档案馆 / 米白纸面 + 墨蓝标题 + 朱砂点缀
   ============================================================ */

/* ============================================================
   1. Base —— 基础变量、全局重置、字体与颜色
   ============================================================ */
:root {
  --paper: #faf6ef;
  --ink: #2c2a26;
  --cinnabar: #b6402e;
  --indigo: #28536b;
  --line: #e4dacb;
  --caption-bg: #f1eadb;
  --white: #ffffff;
  --ink-soft: #4a463f;
  --shadow: rgba(44, 42, 38, 0.08);
  --radius: 8px;
  --radius-sm: 4px;
  --container: 1180px;
  --content-max: 1020px;
  --read-max: 760px;
  --gap: 24px;
  --gap-sm: 16px;
  --gap-lg: 40px;
  --font-serif: "Songti SC", "Noto Serif CJK SC", "SimSun", serif;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", sans-serif;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.9;
  color: var(--ink);
  background-color: var(--paper);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--indigo);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--cinnabar);
}

ul,
ol {
  list-style: none;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.4;
  color: var(--ink);
}

p {
  margin-bottom: 16px;
}

.skip-link {
  position: absolute;
  top: -100px;
  left: 16px;
  z-index: 9999;
  padding: 8px 16px;
  background: var(--indigo);
  color: var(--white);
  border-radius: var(--radius-sm);
  transition: top 0.2s ease;
}

.skip-link:focus {
  top: 8px;
}

/* ============================================================
   2. Layout —— 页面骨架、容器、页头、页脚
   ============================================================ */

/* 全站基础容器 */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-lockup {
  flex-shrink: 0;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-serif);
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0.04em;
  position: relative;
}

.brand-name::after {
  content: "";
  display: inline-block;
  width: 4px;
  height: 4px;
  background: var(--cinnabar);
  border-radius: 50%;
  margin-left: 6px;
  vertical-align: middle;
}

.site-nav {
  display: block;
}

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

.nav-list li a {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background-color 0.2s ease;
}

.nav-list li a:hover {
  color: var(--cinnabar);
  background-color: rgba(182, 64, 46, 0.06);
}

.nav-list li a.is-current {
  color: var(--cinnabar);
  background-color: rgba(182, 64, 46, 0.08);
  font-weight: 500;
}

/* 移动端导航按钮（默认隐藏） */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  background: transparent;
  border-radius: var(--radius-sm);
  cursor: pointer;
  padding: 0;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

/* ============================================================
   3. Components —— 公共组件
   ============================================================ */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-family: var(--font-sans);
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  min-height: 44px;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

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

.btn-primary:hover {
  background-color: #a03626;
  color: var(--white);
}

.btn-secondary {
  background-color: transparent;
  border-color: var(--indigo);
  color: var(--indigo);
}

.btn-secondary:hover {
  background-color: var(--indigo);
  color: var(--white);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--indigo);
  color: var(--indigo);
  font-size: 14px;
  padding: 8px 20px;
}

.btn-outline:hover {
  background-color: var(--indigo);
  color: var(--white);
}

/* 文本链接 */
.text-link {
  color: var(--indigo);
  font-size: 14px;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-color: rgba(40, 83, 107, 0.3);
  transition: color 0.2s ease, text-decoration-color 0.2s ease;
}

.text-link:hover {
  color: var(--cinnabar);
  text-decoration-color: var(--cinnabar);
}

/* 相关链接组（首页 / 排行页底部） */
.related-links {
  max-width: var(--container);
  margin: 0 auto;
  padding: 32px 24px 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.related-links-label {
  font-size: 14px;
  color: var(--ink-soft);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--indigo);
  border-bottom: 1px solid var(--line);
  padding: 4px 2px;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.related-links-item:hover {
  color: var(--cinnabar);
  border-bottom-color: var(--cinnabar);
}

/* ============================================================
   4. 首页组件
   ============================================================ */

.site-main.home-main {
  flex: 1;
}

.section-block {
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px;
}

/* --- 4.1 首屏定位区 --- */
.home-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 64px;
}

.intro-copy h1 {
  font-size: 40px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.intro-lead {
  font-size: 16px;
  color: var(--ink-soft);
  line-height: 1.9;
  margin-bottom: 24px;
}

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

.hero-figure {
  margin: 0;
}

.hero-image {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
  box-shadow: 0 8px 24px var(--shadow);
}

.hero-figure figcaption {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-soft);
  text-align: center;
  letter-spacing: 0.02em;
}

/* --- 4.2 题材阅读轴 --- */
.topic-launch-axis {
  border-top: 1px solid var(--line);
}

.topic-launch-axis h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

.topic-launch-axis > p {
  color: var(--ink-soft);
  margin-bottom: 32px;
}

.axis-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.axis-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px 12px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: background-color 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.axis-item:hover {
  background-color: var(--caption-bg);
  border-color: var(--indigo);
  transform: translateY(-2px);
}

.axis-name {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.axis-audience {
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 4px;
  text-align: center;
}

/* --- 4.3 书架封面陈列 --- */
.shelf-gallery {
  background-color: rgba(228, 218, 203, 0.2);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.shelf-gallery h2 {
  font-size: 28px;
  margin-bottom: 8px;
}

.shelf-gallery > p {
  color: var(--ink-soft);
  margin-bottom: 32px;
}

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

.book-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.book-card:hover {
  box-shadow: 0 6px 16px var(--shadow);
  transform: translateY(-3px);
}

.book-link {
  display: block;
  color: inherit;
}

.book-link:hover {
  color: inherit;
}

.book-cover {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.book-info {
  padding: 16px;
  background-color: var(--caption-bg);
}

.book-genre {
  font-size: 18px;
  font-family: var(--font-serif);
  margin-bottom: 4px;
}

.book-scene {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

/* --- 4.4 最近更新摘要 --- */
.update-feed h2 {
  font-size: 28px;
  margin-bottom: 24px;
}

.update-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.update-item {
  display: grid;
  grid-template-columns: 96px 96px 1fr auto;
  gap: 16px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

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

.update-date {
  font-size: 13px;
  color: var(--ink-soft);
  font-family: var(--font-serif);
}

.update-column {
  font-size: 14px;
  font-weight: 500;
  color: var(--indigo);
}

.update-desc {
  font-size: 14px;
  color: var(--ink-soft);
}

.update-link {
  font-size: 13px;
  white-space: nowrap;
}

/* --- 4.5 榜单阅读说明 --- */
.rank-guide-note {
  border-top: 1px solid var(--line);
}

.rank-guide-note h2 {
  font-size: 28px;
  margin-bottom: 24px;
}

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

.note-column {
  padding: 20px;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.note-column h3 {
  font-size: 18px;
  margin-bottom: 8px;
  color: var(--indigo);
}

.note-column p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

/* --- 4.6 阅读指南入口 --- */
.guide-entry-band {
  background-color: var(--indigo);
  border-radius: var(--radius);
  margin-top: 8px;
  margin-bottom: 8px;
}

.guide-entry-band h2 {
  color: var(--white);
  font-size: 28px;
  margin-bottom: 8px;
}

.guide-entry-band > p {
  color: rgba(255, 255, 255, 0.85);
  margin-bottom: 24px;
}

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

.guide-card {
  background-color: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius);
  padding: 20px;
}

.guide-card h3 {
  color: var(--white);
  font-size: 17px;
  margin-bottom: 8px;
}

.guide-card p {
  color: rgba(255, 255, 255, 0.85);
  font-size: 14px;
  margin-bottom: 16px;
}

.guide-card .btn-outline {
  border-color: var(--white);
  color: var(--white);
}

.guide-card .btn-outline:hover {
  background-color: var(--white);
  color: var(--indigo);
}

/* ============================================================
   5. 内页通用骨架
   ============================================================ */

.site-main.inner-main {
  flex: 1;
  max-width: var(--container);
  width: 100%;
  margin: 0 auto;
  padding: 0 24px 48px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  padding: 20px 0 8px;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

.breadcrumb-sep {
  margin: 0 8px;
  color: var(--line);
}

.breadcrumb-current {
  color: var(--ink-soft);
}

/* 页面标题区 */
.page-header {
  padding: 24px 0 32px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 40px;
}

.page-title {
  font-size: 36px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: var(--read-max);
  margin: 0;
}

/* 通用 section 标题 */
.section-title {
  font-size: 26px;
  margin-bottom: 8px;
}

.section-intro {
  color: var(--ink-soft);
  font-size: 15px;
  margin-bottom: 24px;
}

/* 内页通用图文行 */
.content-media {
  margin: 24px 0;
}

.content-media-inline img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.content-media-inline figcaption {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 8px;
  text-align: center;
}

/* ============================================================
   6. 内页：漫画书库 library
   ============================================================ */

.field-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 48px;
}

.field-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
}

.field-item h3 {
  font-size: 16px;
  color: var(--indigo);
  margin-bottom: 6px;
}

.field-item p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

.topic-grid-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.topic-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.topic-card:hover {
  box-shadow: 0 6px 16px var(--shadow);
  transform: translateY(-3px);
}

.cover-figure {
  position: relative;
  margin: 0;
}

.cover-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.cover-caption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: rgba(44, 42, 38, 0.7);
  color: var(--white);
  padding: 8px 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.topic-name {
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
}

.scene-label {
  font-size: 12px;
  opacity: 0.85;
}

.topic-desc {
  font-size: 13px;
  color: var(--ink-soft);
  padding: 12px 12px 4px;
  margin: 0;
  min-height: 40px;
}

.topic-card .text-link {
  display: inline-block;
  padding: 4px 12px 12px;
}

.reading-scene-note {
  margin-top: 48px;
  background-color: var(--caption-bg);
  border-left: 3px solid var(--indigo);
  border-radius: var(--radius-sm);
  padding: 24px;
}

.reading-scene-note h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.reading-scene-note p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

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

/* 延伸入口 */
.related-entry {
  margin-top: 48px;
  text-align: center;
}

.related-entry h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.related-entry > p {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 20px;
}

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

.entry-button {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--indigo);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 14px;
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.entry-button:hover {
  background-color: #1d3f52;
  color: var(--white);
}

/* ============================================================
   7. 内页：题材专题 topic
   ============================================================ */

.topic-lead {
  margin-bottom: 24px;
}

.topic-lead h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.topic-lead p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: var(--read-max);
}

.topic-visual {
  margin: 32px 0;
}

.topic-visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.visual-caption {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 8px;
  text-align: center;
  font-style: normal;
}

/* 文章索引 */
.topic-index {
  background-color: var(--caption-bg);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 40px;
}

.topic-index h2 {
  font-size: 18px;
  margin-bottom: 8px;
}

.index-list {
  list-style: decimal;
  padding-left: 20px;
}

.index-list li {
  padding: 4px 0;
}

.index-list li a {
  font-size: 14px;
}

.article-body {
  max-width: var(--read-max);
  margin: 0 auto;
}

.topic-entry {
  margin-bottom: 40px;
}

.topic-entry h3 {
  font-size: 22px;
  color: var(--indigo);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.topic-entry p {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

/* 相关阅读 */
.related-reading {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  padding-top: 32px;
}

.related-reading h2 {
  font-size: 22px;
  margin-bottom: 20px;
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  align-items: start;
}

.related-card {
  margin: 0;
}

.related-card img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.related-card figcaption {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 8px;
  text-align: center;
}

.related-links {
  max-width: none;
  padding: 0;
}

.related-links p {
  font-size: 14px;
  color: var(--ink-soft);
}

.related-links ul {
  margin-top: 8px;
}

.related-links li {
  padding: 4px 0;
}

.related-links li a {
  font-size: 14px;
}

/* ============================================================
   8. 内页：漫画排行 rank
   ============================================================ */

.rank-definition {
  margin-bottom: 48px;
}

.rank-definition h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

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

.definition-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.definition-item h3 {
  font-size: 16px;
  color: var(--indigo);
  margin-bottom: 8px;
}

.definition-item p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.rank-cardset {
  margin-bottom: 48px;
}

.rank-cardset h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-lead {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 24px;
}

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

.rank-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.rank-card:hover {
  box-shadow: 0 6px 16px var(--shadow);
  transform: translateY(-3px);
}

.rank-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.rank-card h3 {
  font-size: 17px;
  padding: 12px 12px 4px;
  color: var(--indigo);
}

.rank-card p {
  font-size: 13px;
  color: var(--ink-soft);
  padding: 0 12px;
  margin-bottom: 8px;
}

.rank-card a {
  display: inline-block;
  padding: 0 12px 12px;
  font-size: 13px;
}

.rank-boundary {
  background-color: var(--caption-bg);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.rank-boundary h2 {
  font-size: 18px;
  color: var(--cinnabar);
  margin-bottom: 8px;
}

.rank-boundary p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.return-entry {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 32px;
  flex-wrap: wrap;
}

.entry-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background-color: var(--indigo);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 14px;
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.entry-btn:hover {
  background-color: #1d3f52;
  color: var(--white);
}

/* ============================================================
   9. 内页：最近更新 updates
   ============================================================ */

.updates-timeline {
  position: relative;
  padding-left: 24px;
  border-left: 2px solid var(--line);
}

.updates-timeline h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.updates-timeline .content-media-inline {
  margin: 16px 0 24px;
}

.updates-timeline .section-intro {
  margin-bottom: 32px;
}

.update-entry {
  position: relative;
  padding: 0 0 32px 24px;
}

.update-entry::before {
  content: "";
  position: absolute;
  left: -30px;
  top: 6px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background-color: var(--cinnabar);
  border: 2px solid var(--paper);
}

.update-date {
  font-family: var(--font-serif);
  font-size: 14px;
  color: var(--indigo);
  font-weight: 600;
}

.update-content h3 {
  font-size: 17px;
  margin: 4px 0 4px;
}

.update-content p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.update-content a {
  font-size: 13px;
}

.link-arrow {
  display: inline-block;
  margin-left: 2px;
}

/* 更新节奏说明 */
.update-pattern-box {
  margin-top: 48px;
}

.update-pattern-box h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

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

.pattern-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.pattern-card h3 {
  font-size: 17px;
  color: var(--indigo);
  margin-bottom: 8px;
}

.pattern-card p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

/* 继续阅读指引 */
.guidance-box {
  margin-top: 48px;
}

.guidance-box h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.guidance-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.guide-link-card {
  display: flex;
  flex-direction: column;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.guide-link-card:hover {
  border-color: var(--indigo);
  box-shadow: 0 4px 12px var(--shadow);
}

.guide-link-title {
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--indigo);
  margin-bottom: 4px;
}

.guide-link-desc {
  font-size: 13px;
  color: var(--ink-soft);
}

/* ============================================================
   10. 内页：阅读指南 guide
   ============================================================ */

.reading-sequence {
  margin-bottom: 48px;
}

.reading-sequence h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.guide-visual {
  margin: 0 0 24px;
}

.guide-visual img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.guide-visual figcaption {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 8px;
  text-align: center;
}

.sequence-intro {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: var(--read-max);
  margin-bottom: 24px;
}

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

.step-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 24px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  align-items: start;
}

.step-card h3 {
  font-size: 17px;
  color: var(--indigo);
  margin-bottom: 6px;
}

.step-card p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.step-card::before {
  content: attr(data-step);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background-color: var(--indigo);
  color: var(--white);
  font-family: var(--font-serif);
  font-size: 18px;
  border-radius: 50%;
  grid-row: span 2;
}

/* 版式形态对比 */
.format-compare {
  margin-bottom: 48px;
}

.format-compare h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.format-intro {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 24px;
}

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

.format-card {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
}

.format-card h3 {
  font-size: 17px;
  color: var(--indigo);
  margin-bottom: 8px;
}

.format-card p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.format-tip {
  font-size: 13px;
  color: var(--cinnabar);
  border-top: 1px solid var(--line);
  padding-top: 8px;
}

/* 术语表 */
.term-table {
  margin-bottom: 48px;
}

.term-table h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.term-intro {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 24px;
}

.term-list {
  display: flex;
  flex-direction: column;
}

.term-row {
  display: grid;
  grid-template-columns: 120px 1fr 1fr;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.term-row:last-child {
  border-bottom: none;
}

.term-name {
  font-family: var(--font-serif);
  font-weight: 600;
  color: var(--indigo);
  font-size: 15px;
}

.term-desc {
  font-size: 14px;
  color: var(--ink-soft);
}

.term-scene {
  font-size: 13px;
  color: var(--ink-soft);
}

/* 追更节奏与入口 */
.related-guide {
  margin-bottom: 48px;
}

.related-guide h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.rhythm-intro {
  color: var(--ink-soft);
  font-size: 14px;
  margin-bottom: 24px;
}

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

.rhythm-step {
  background-color: var(--caption-bg);
  border-radius: var(--radius);
  padding: 20px;
}

.rhythm-step h3 {
  font-size: 17px;
  color: var(--indigo);
  margin-bottom: 8px;
}

.rhythm-step p {
  font-size: 14px;
  color: var(--ink-soft);
  margin: 0;
}

.guide-entry-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.guide-entry-links a {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--indigo);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 14px;
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.guide-entry-links a:hover {
  background-color: #1d3f52;
  color: var(--white);
}

/* 打印按钮 */
.print-button {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 90;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  background-color: var(--indigo);
  border: none;
  border-radius: 50%;
  cursor: pointer;
  box-shadow: 0 4px 12px var(--shadow);
  transition: background-color 0.2s ease;
}

.print-button::before {
  content: "⎙";
  font-size: 20px;
  color: var(--white);
}

.print-button:hover {
  background-color: #1d3f52;
}

/* ============================================================
   11. 内页：帮助中心 help
   ============================================================ */

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

.faq-list h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.faq-list .content-media-inline {
  max-width: var(--read-max);
  margin: 16px auto 24px;
}

.faq-item {
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 500;
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
  color: var(--ink);
  transition: color 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--indigo);
  transition: transform 0.2s ease;
}

.faq-item[open] summary {
  color: var(--cinnabar);
}

.faq-item[open] summary::after {
  content: "−";
  transform: translateY(-50%);
}

.faq-item summary:hover {
  background-color: rgba(40, 83, 107, 0.04);
}

.faq-answer {
  padding: 0 20px 16px;
}

.faq-answer p {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

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

/* 边界说明 */
.boundary-note {
  background-color: var(--caption-bg);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 48px;
}

.boundary-note h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

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

.boundary-item {
  font-size: 14px;
  color: var(--ink-soft);
  padding-left: 20px;
  position: relative;
  margin: 0;
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--cinnabar);
}

/* 下一站入口 */
.site-entry h2 {
  font-size: 22px;
  margin-bottom: 20px;
}

.entry-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.entry-card {
  display: flex;
  flex-direction: column;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.entry-card:hover {
  border-color: var(--indigo);
  box-shadow: 0 4px 12px var(--shadow);
}

.entry-card h3 {
  font-size: 16px;
  color: var(--indigo);
  margin-bottom: 4px;
}

.entry-card p {
  font-size: 13px;
  color: var(--ink-soft);
  margin: 0;
}

/* ============================================================
   12. 内页：站务说明 about
   ============================================================ */

.about-position {
  margin-bottom: 48px;
}

.about-position h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.about-position .content-media-inline {
  max-width: var(--read-max);
  margin: 16px 0 24px;
}

.about-position p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: var(--read-max);
}

.editorial-principle {
  margin-bottom: 48px;
}

.editorial-principle h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.principle-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.principle-list li {
  padding: 14px 0 14px 24px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--ink-soft);
  position: relative;
}

.principle-list li::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 24px;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background-color: var(--indigo);
}

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

.rights-statement {
  background-color: var(--caption-bg);
  border-radius: var(--radius);
  padding: 24px;
  margin-bottom: 48px;
}

.rights-statement h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.rights-statement p {
  font-size: 14px;
  color: var(--ink-soft);
  max-width: var(--read-max);
}

.correction-note {
  margin-bottom: 32px;
}

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

.correction-note p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: var(--read-max);
}

.correction-links {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 16px;
}

.correction-links li a {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  background-color: var(--indigo);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 14px;
  min-height: 44px;
  transition: background-color 0.2s ease;
}

.correction-links li a:hover {
  background-color: #1d3f52;
  color: var(--white);
}

/* ============================================================
   13. 404 页面
   ============================================================ */

.error-main {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
}

.error-panel {
  text-align: center;
  max-width: 520px;
}

.error-code {
  font-family: var(--font-serif);
  font-size: 72px;
  font-weight: 700;
  color: var(--cinnabar);
  margin-bottom: 8px;
}

.error-panel h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 15px;
  color: var(--ink-soft);
}

.error-guide {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  padding: 10px 24px;
  background-color: var(--indigo);
  color: var(--white);
  border-radius: var(--radius);
  font-size: 14px;
  min-height: 44px;
}

.error-home-link:hover {
  background-color: #1d3f52;
  color: var(--white);
}

/* ============================================================
   14. 页脚
   ============================================================ */

.site-footer {
  background-color: #f1eadb;
  border-top: 1px solid var(--line);
  margin-top: auto;
}

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

.footer-slogan {
  font-family: var(--font-serif);
  font-size: 18px;
  color: var(--ink);
  margin-bottom: 24px;
  text-align: center;
}

.footer-link-group {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-bottom: 32px;
}

.footer-group h4 {
  font-size: 14px;
  color: var(--indigo);
  margin-bottom: 12px;
  font-family: var(--font-sans);
  font-weight: 600;
}

.footer-group li {
  padding: 3px 0;
}

.footer-group li a {
  font-size: 13px;
  color: var(--ink-soft);
  transition: color 0.2s ease;
}

.footer-group li a:hover {
  color: var(--cinnabar);
}

.copyright {
  text-align: center;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding-top: 16px;
  margin: 0;
}

/* ============================================================
   15. Responsive —— 响应式断点
   ============================================================ */

/* 平板及以下：1180 → 980 */
@media (max-width: 1024px) {
  .axis-grid {
    grid-template-columns: repeat(4, 1fr);
  }

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

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

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

/* 手机断点：768px */
@media (max-width: 768px) {
  .header-inner {
    height: 64px;
    padding: 0 16px;
    position: relative;
  }

  /* 显示汉堡按钮 */
  .nav-toggle {
    display: flex;
  }

  /* 导航列表收起状态 */
  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: 0 8px 16px rgba(44, 42, 38, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px;
    gap: 0;
  }

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

  .nav-list li a {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: var(--radius-sm);
  }

  /* 首页首屏 */
  .home-intro {
    grid-template-columns: 1fr;
    gap: 24px;
    padding-top: 40px;
    padding-bottom: 40px;
  }

  .intro-copy h1 {
    font-size: 30px;
  }

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

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

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

  .topic-launch-axis h2,
  .shelf-gallery h2,
  .update-feed h2,
  .rank-guide-note h2 {
    font-size: 24px;
  }

  /* 题材轴 */
  .axis-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  /* 书架陈列 */
  .shelf-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }

  .book-info {
    padding: 10px;
  }

  .book-genre {
    font-size: 15px;
  }

  .book-scene {
    font-size: 12px;
  }

  /* 更新行 */
  .update-item {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 12px 0;
  }

  .update-date {
    font-size: 12px;
  }

  .update-column {
    font-size: 15px;
  }

  .update-desc {
    font-size: 13px;
  }

  .update-link {
    font-size: 13px;
  }

  /* 榜单说明三列 */
  .rank-note-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  /* 指南入口 */
  .guide-entry-band {
    border-radius: 0;
    margin: 0;
  }

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

  /* 内页通用 */
  .site-main.inner-main {
    padding: 0 16px 32px;
  }

  .breadcrumb {
    padding-top: 16px;
  }

  .page-header {
    padding: 16px 0 24px;
    margin-bottom: 24px;
  }

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

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

  /* 书库字段图例 */
  .field-list {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  /* 书库网格 */
  .topic-grid-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .topic-desc {
    min-height: 0;
  }

  /* 阅读场景注释 */
  .reading-scene-note {
    padding: 16px;
    margin-top: 24px;
  }

  /* 延伸入口 */
  .entry-links {
    flex-direction: column;
    align-items: stretch;
  }

  .entry-button {
    width: 100%;
    justify-content: center;
  }

  /* 题材专题 */
  .topic-index {
    padding: 16px;
  }

  .article-body {
    max-width: 100%;
  }

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

  /* 排行定义 */
  .definition-list {
    grid-template-columns: 1fr;
    gap: 8px;
  }

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

  .rank-card h3,
  .rank-card p,
  .rank-card a {
    padding-left: 16px;
    padding-right: 16px;
  }

  .return-entry {
    flex-direction: column;
    align-items: stretch;
  }

  .entry-btn {
    width: 100%;
    justify-content: center;
  }

  /* 最近更新 */
  .updates-timeline {
    padding-left: 16px;
  }

  .update-entry {
    padding-left: 16px;
  }

  .update-entry::before {
    left: -22px;
  }

  .pattern-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .guidance-links {
    grid-template-columns: 1fr;
  }

  /* 阅读指南 */
  .step-card {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .step-card::before {
    display: none;
  }

  .format-grid {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .term-row {
    grid-template-columns: 1fr;
    gap: 2px;
    padding: 12px 0;
  }

  .rhythm-steps {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .guide-entry-links {
    flex-direction: column;
    align-items: stretch;
  }

  .guide-entry-links a {
    width: 100%;
    justify-content: center;
  }

  /* 帮助中心 */
  .faq-answer {
    padding: 0 16px 12px;
  }

  .faq-item summary {
    padding: 14px 40px 14px 16px;
  }

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

  /* 站务说明 */
  .principle-list li {
    padding-left: 20px;
  }

  .correction-links {
    flex-direction: column;
    align-items: stretch;
  }

  .correction-links li a {
    width: 100%;
    justify-content: center;
  }

  /* 页脚 */
  .footer-inner {
    padding: 32px 16px 16px;
  }

  .footer-link-group {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .footer-slogan {
    font-size: 16px;
  }

  /* 打印按钮在移动端缩小 */
  .print-button {
    right: 16px;
    bottom: 16px;
    width: 44px;
    height: 44px;
  }
}

/* 小屏手机：390px */
@media (max-width: 480px) {
  .shelf-grid {
    grid-template-columns: 1fr;
  }

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

  .axis-item {
    padding: 14px 8px;
  }

  .footer-link-group {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .footer-group {
    border-bottom: 1px solid var(--line);
    padding-bottom: 8px;
  }

  .footer-group:last-child {
    border-bottom: none;
  }

  .footer-group ul {
    display: none;
  }

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

  .hero-actions .btn {
    padding: 10px 16px;
  }
}

/* ============================================================
   16. 打印样式
   ============================================================ */

@media print {
  .site-header,
  .site-footer,
  .breadcrumb,
  .nav-toggle,
  .print-button,
  .related-links,
  .guide-entry-links,
  .entry-links,
  .return-entry,
  .guidance-links,
  .correction-links {
    display: none !important;
  }

  body {
    background-color: var(--white);
    color: var(--ink);
    font-size: 12pt;
  }

  .site-main.inner-main {
    max-width: 100%;
    padding: 0;
  }

  .page-header {
    border-bottom: 1px solid var(--ink);
    margin-bottom: 24px;
  }

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

  .section-block,
  .site-main.inner-main {
    padding: 0;
  }

  a {
    color: var(--ink);
    text-decoration: none;
  }

  .faq-item {
    border: none;
    margin-bottom: 8px;
  }

  .faq-answer {
    display: block;
    padding: 0;
  }

  .faq-item summary {
    padding: 8px 0;
  }

  .faq-item summary::after {
    display: none;
  }

  .step-card,
  .format-card,
  .pattern-card,
  .definition-item,
  .rank-card,
  .topic-card,
  .book-card {
    break-inside: avoid;
  }
}