/* ==========================================================================
   香蕉漫画 · 全站样式表
   底色浅米纸、正文深墨、强调低饱和靛蓝，题材方向四档灰调色标
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base · 变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  --paper: #F7F4EE;
  --paper-deep: #F1ECE3;
  --ink: #23201C;
  --ink-soft: #6B655C;
  --indigo: #3B4C8C;
  --indigo-deep: #2C3A6E;
  --line: #DCD5C8;
  --line-strong: #C6BDAB;
  --tone-1: #8C6A4A;
  --tone-2: #5F7A6A;
  --tone-3: #7A5C7E;
  --tone-4: #4A6E8C;
  --radius: 6px;
  --radius-sm: 4px;
  --shell: 1120px;
  --prose: 720px;
  --serif: "Songti SC", "SimSun", "Noto Serif SC", Georgia, serif;
  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.75;
}

h1, h2, h3, h4 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0;
}

ul, ol {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

figure {
  margin: 0;
}

a {
  color: var(--indigo);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover {
  color: var(--indigo-deep);
  text-decoration-thickness: 2px;
}

button {
  font: inherit;
  color: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--indigo);
  outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   2. layout · 站点骨架（页头 / 导航 / 主容器 / 页脚）
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--paper);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
  min-height: 44px;
  align-content: center;
  flex-wrap: wrap;
}

.brand-mark {
  font-family: var(--serif);
  font-size: 21px;
  font-weight: 600;
  color: var(--ink);
}

.brand-sub {
  font-size: 12px;
  color: var(--ink-soft);
  font-family: var(--sans);
}

.site-nav {
  display: block;
}

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

.nav-list li {
  display: flex;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink);
  text-decoration: none;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
}

.nav-list a:hover {
  color: var(--indigo);
  background: var(--paper-deep);
}

.nav-list a.is-current {
  color: var(--indigo);
  border-bottom-color: var(--indigo);
  font-weight: 600;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 4px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
}

.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.home-main {
  display: block;
}

.inner-main {
  display: block;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.site-footer {
  margin-top: 56px;
  background: var(--paper-deep);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(140px, 1fr));
  gap: 32px 28px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px 24px 24px;
}

.footer-logo {
  font-family: var(--serif);
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
}

.footer-desc {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
  max-width: 34ch;
}

.footer-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  letter-spacing: 0;
  margin-bottom: 10px;
}

.footer-group ul {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.footer-group a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

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

.footer-copy {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px 24px 28px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

/* 内页通用：面包屑 + 页面标题区 */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

.breadcrumb-sep {
  color: var(--line-strong);
}

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

.page-header {
  padding: 18px 0 28px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  color: var(--ink);
}

.page-description {
  margin-top: 12px;
  max-width: var(--prose);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   3. components · 通用小组件
   -------------------------------------------------------------------------- */
.field-name {
  font-size: 13px;
  color: var(--ink-soft);
}

.field-value {
  font-size: 15px;
  color: var(--ink);
  font-family: var(--mono);
}

.tag {
  display: inline-block;
  padding: 1px 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-soft);
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.tag-1 {
  color: var(--tone-1);
  border-color: var(--tone-1);
}

.tag-2 {
  color: var(--tone-2);
  border-color: var(--tone-2);
}

.tag-3 {
  color: var(--tone-3);
  border-color: var(--tone-3);
}

.tag-4 {
  color: var(--tone-4);
  border-color: var(--tone-4);
}

.topic-tag-1 { color: var(--tone-1); }
.topic-tag-2 { color: var(--tone-2); }
.topic-tag-3 { color: var(--tone-3); }
.topic-tag-4 { color: var(--tone-4); }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  transition: background-color .18s ease, border-color .18s ease, transform .18s ease;
}

.btn-primary {
  color: #FFFFFF;
  background: var(--indigo);
  border: 1px solid var(--indigo);
}

.btn-primary:hover {
  color: #FFFFFF;
  background: var(--indigo-deep);
  border-color: var(--indigo-deep);
  transform: translateY(-1px);
}

.btn-ghost {
  color: var(--indigo);
  background: transparent;
  border: 1px solid var(--line-strong);
}

.btn-ghost:hover {
  color: var(--indigo-deep);
  border-color: var(--indigo);
  background: var(--paper-deep);
  transform: translateY(-1px);
}

.section-head {
  margin-bottom: 22px;
}

.section-head h2 {
  font-size: 22px;
}

.section-head p {
  margin-top: 8px;
  max-width: var(--prose);
  font-size: 15px;
  color: var(--ink-soft);
}

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

.section-lead,
.section-intro {
  margin-top: 10px;
  max-width: var(--prose);
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.section-more {
  margin-top: 18px;
  font-size: 14px;
}

.step-no,
.step-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  font-family: var(--mono);
  font-size: 14px;
  color: var(--indigo);
  background: var(--paper-deep);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  flex: 0 0 auto;
}

/* --------------------------------------------------------------------------
   4. pages · 首页
   -------------------------------------------------------------------------- */
.fact-bar {
  background: var(--paper-deep);
  border-bottom: 1px solid var(--line);
}

.fact-bar p {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px 24px;
  font-size: 13px;
  color: var(--ink-soft);
}

.home-main > section,
.home-main > div.split-section {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px;
  align-items: center;
  padding-top: 44px !important;
  padding-bottom: 44px !important;
}

.hero-text {
  min-width: 0;
}

.hero-eyebrow {
  font-size: 13px;
  color: var(--indigo);
  margin-bottom: 12px;
}

.hero-title {
  font-size: 38px;
  line-height: 1.28;
}

.hero-lead {
  margin-top: 16px;
  max-width: 46ch;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.hero-figure {
  min-width: 0;
}

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--paper-deep);
}

.hero-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.topic-overview {
  padding-top: 8px !important;
  padding-bottom: 44px !important;
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.topic-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-top: 3px solid var(--line-strong);
  border-radius: var(--radius);
  transition: border-color .18s ease, transform .18s ease;
}

.topic-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.topic-card-1 { border-top-color: var(--tone-1); }
.topic-card-2 { border-top-color: var(--tone-2); }
.topic-card-3 { border-top-color: var(--tone-3); }
.topic-card-4 { border-top-color: var(--tone-4); }

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

.topic-scope {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.topic-count {
  display: flex;
  align-items: baseline;
  gap: 8px;
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
}

.split-section {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: 40px;
  padding-top: 44px !important;
  padding-bottom: 44px !important;
  border-top: 1px solid var(--line);
}

.cover-browse,
.update-browse {
  min-width: 0;
}

.cover-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.cover-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .18s ease, transform .18s ease;
}

.cover-card:hover,
.cover-card:focus-within {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.cover-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background: var(--paper-deep);
}

.cover-name {
  font-size: 16px;
}

.cover-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.cover-date {
  display: flex;
  align-items: baseline;
  gap: 6px;
  margin-top: auto;
}

.batch-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.batch-item {
  padding: 16px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-left: 3px solid var(--indigo);
  border-radius: var(--radius);
}

.batch-no,
.batch-date {
  display: flex;
  align-items: baseline;
  gap: 8px;
}

.batch-date {
  margin-top: 4px;
}

.batch-entries {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

.batch-entries li {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink);
}

.ranking-teaser,
.fields-teaser {
  min-width: 0;
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rank-row {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 12px 4px;
  border-bottom: 1px solid var(--line);
}

.rank-row:last-child {
  border-bottom: 0;
}

.rank-no {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--indigo);
}

.rank-name {
  font-size: 16px;
}

.rank-topic {
  margin-top: 2px;
  font-size: 13px;
  color: var(--ink-soft);
}

.rank-note {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.field-table {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
  overflow: hidden;
}

.field-table > div,
.field-table > p {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 12px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.field-table > div:last-child,
.field-table > p:last-child {
  border-bottom: 0;
}

.field-table .field-name {
  font-size: 13px;
  color: var(--ink-soft);
}

.field-table .field-value {
  font-size: 14px;
  font-family: var(--sans);
  line-height: 1.7;
}

.guide-teaser {
  padding-top: 44px !important;
  padding-bottom: 44px !important;
  border-top: 1px solid var(--line);
}

.guide-teaser .step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.guide-teaser .step-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  grid-template-rows: auto auto auto;
  gap: 4px 10px;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.guide-teaser .step-no {
  grid-row: 1 / 4;
}

.guide-teaser .step-title {
  font-size: 17px;
}

.guide-teaser .step-desc {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.guide-teaser .step-link {
  font-size: 14px;
}

.feedback-note {
  margin-top: 24px;
  padding: 20px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feedback-title {
  font-size: 17px;
}

.feedback-note p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.site-index {
  padding-top: 44px !important;
  padding-bottom: 8px !important;
  border-top: 1px solid var(--line);
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.index-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 16px 14px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color .18s ease, transform .18s ease;
}

.index-item:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.index-item a {
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.index-item a:hover {
  text-decoration: underline;
}

.index-desc {
  font-size: 13px;
  line-height: 1.65;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   5. pages · 题材分类（topic）
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 232px minmax(0, 1fr);
}

.topic-toc {
  position: sticky;
  top: 84px;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toc-title {
  font-family: var(--sans);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.toc-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.toc-list a {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  font-size: 14px;
  color: var(--ink);
  text-decoration: none;
}

.toc-list a:hover {
  color: var(--indigo);
  text-decoration: underline;
}

.toc-note {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.topic-body {
  min-width: 0;
}

.topic-body > section + section {
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.topic-directions > .section-lead,
.topic-boundary > .section-lead,
.topic-path > .section-lead {
  margin-bottom: 24px;
}

.direction-block {
  padding: 22px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.direction-block + .direction-block {
  margin-top: 18px;
}

.direction-head {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
}

.direction-index {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--indigo);
}

.direction-name {
  font-size: 20px;
}

.direction-count {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.direction-scope {
  margin-top: 12px;
  max-width: var(--prose);
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.direction-works {
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 20px;
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

.work-cover img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper-deep);
}

.direction-work-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
}

.direction-work-list li {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.direction-work-list li:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

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

.work-meta {
  margin-top: 2px;
  font-size: 13px;
  color: var(--ink-soft);
}

.boundary-item {
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.boundary-item + .boundary-item {
  margin-top: 14px;
}

.boundary-item h3 {
  font-size: 17px;
}

.boundary-item p {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.topic-path .path-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.path-step {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  grid-template-rows: auto auto;
  gap: 4px 10px;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-step .step-no {
  grid-row: 1 / 3;
}

.path-step h3 {
  font-size: 16px;
}

.path-step p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.path-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   6. pages · 更新记录（updates）
   -------------------------------------------------------------------------- */
.updates-layout {
  display: block;
}

.updates-main {
  max-width: var(--prose);
  min-width: 0;
}

.content-section + .content-section {
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.rule-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.rule-index {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--indigo);
  padding-top: 2px;
}

.rule-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.batch-list-section .section-lead {
  margin-bottom: 22px;
}

.batch-card {
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.batch-card + .batch-card {
  margin-top: 16px;
}

.batch-head {
  display: flex;
  align-items: baseline;
  gap: 14px;
  flex-wrap: wrap;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line);
}

.batch-code {
  font-family: var(--mono);
  font-size: 16px;
  color: var(--indigo);
}

.batch-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  font-size: 13px;
  color: var(--ink-soft);
}

.batch-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 14px;
}

.batch-items .batch-item {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) auto;
  gap: 4px 16px;
  padding: 0 0 12px;
  background: transparent;
  border: 0;
  border-bottom: 1px dashed var(--line);
  border-left: 0;
  border-radius: 0;
}

.batch-items .batch-item:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

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

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

.batch-progress {
  grid-column: 2;
  grid-row: 1 / 3;
  align-self: center;
  font-family: var(--mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.batch-cover-figure {
  margin-top: 20px;
  max-width: 360px;
}

.batch-cover-figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper-deep);
}

.batch-cover-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.rhythm-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 20px;
}

.rhythm-col {
  min-width: 0;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.rhythm-subtitle {
  font-size: 16px;
}

.rhythm-text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.rhythm-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 20px;
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   7. pages · 人气位次（ranking）
   -------------------------------------------------------------------------- */
.ranking-method,
.ranking-list-section,
.ranking-usage,
.ranking-related {
  max-width: var(--prose);
}

.section + .section {
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.method-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  margin-top: 20px;
}

.method-item {
  min-width: 0;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.method-name {
  font-size: 16px;
}

.method-text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.ranking-list-section .section-lead {
  margin-bottom: 22px;
}

.ranking-feature {
  margin-bottom: 24px;
  max-width: 320px;
}

.ranking-feature img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper-deep);
}

.ranking-feature figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.ranking-row {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.ranking-row:first-child {
  border-top: 1px solid var(--line);
}

.ranking-rank {
  font-family: var(--mono);
  font-size: 18px;
  color: var(--indigo);
  padding-top: 2px;
}

.ranking-body {
  min-width: 0;
}

.ranking-name {
  font-size: 17px;
}

.ranking-topic {
  margin-top: 2px;
  font-size: 13px;
  color: var(--ink-soft);
}

.ranking-note {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.usage-item {
  min-width: 0;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.usage-name {
  font-size: 16px;
}

.usage-text {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 16px;
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   8. pages · 条目字段说明（fields）
   -------------------------------------------------------------------------- */
.field-figure {
  max-width: 320px;
  margin-bottom: 36px;
}

.field-figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper-deep);
}

.field-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.field-definitions,
.field-missing,
.field-changelog,
.field-feedback {
  max-width: var(--prose);
}

.field-definitions + .field-missing,
.field-missing + .field-changelog,
.field-changelog + .field-feedback {
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.field-item {
  margin-top: 20px;
  padding: 20px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-item h3 {
  font-size: 17px;
}

.field-meaning {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.field-scope {
  margin-top: 10px;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.missing-table {
  margin-top: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #FFFFFF;
  overflow: hidden;
}

.missing-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 16px;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
}

.missing-row:last-child {
  border-bottom: 0;
}

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

.missing-value {
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink);
}

.missing-note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.changelog-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.changelog-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
}

.changelog-no {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--indigo);
  padding-top: 3px;
}

.changelog-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.changelog-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--ink-soft);
}

.feedback-steps {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 20px;
}

.feedback-steps li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
}

.feedback-steps p {
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink);
}

.field-feedback .feedback-note {
  margin-top: 20px;
  padding: 18px;
  background: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   9. pages · 查阅指引（guide）
   -------------------------------------------------------------------------- */
.guide-path,
.guide-boundary,
.guide-feedback,
.guide-faq {
  max-width: var(--prose);
}

.guide-path + .guide-boundary,
.guide-boundary + .guide-feedback,
.guide-feedback + .guide-faq {
  margin-top: 44px;
  padding-top: 36px;
  border-top: 1px solid var(--line);
}

.guide-path .step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 22px;
}

.guide-path .step-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 18px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  scroll-margin-top: 90px;
}

.guide-path .step-body {
  min-width: 0;
}

.guide-path .step-title {
  font-size: 17px;
}

.guide-path .step-body p {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.guide-figure {
  margin-top: 24px;
  max-width: 320px;
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--paper-deep);
}

.guide-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.guide-boundary > p {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 22px;
}

.guide-feedback > p {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.guide-feedback .feedback-steps {
  counter-reset: guide-feedback;
  margin-top: 18px;
}

.guide-feedback .feedback-steps li {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 12px;
  align-items: start;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
  line-height: 1.8;
}

.guide-feedback .feedback-steps li:last-child {
  border-bottom: 0;
}

.guide-feedback .feedback-note {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.guide-faq .faq-item {
  margin-top: 14px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.guide-faq .faq-item summary {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 18px;
  font-family: var(--serif);
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.guide-faq .faq-item summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-family: var(--mono);
  font-size: 18px;
  color: var(--indigo);
}

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

.guide-faq .faq-item p {
  padding: 0 18px 18px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   10. pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px;
}

.error-panel {
  width: 100%;
  max-width: 620px;
  padding: 40px 32px;
  background: #FFFFFF;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: left;
}

.error-code {
  font-family: var(--mono);
  font-size: 44px;
  line-height: 1;
  color: var(--indigo);
}

.error-panel h1 {
  margin-top: 16px;
  font-size: 26px;
}

.error-text {
  margin-top: 12px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 26px;
}

.error-actions .btn-primary {
  color: var(--indigo);
  background: transparent;
  border-color: var(--line-strong);
}

.error-actions .btn-primary:hover {
  color: #FFFFFF;
  background: var(--indigo);
  border-color: var(--indigo);
}

/* --------------------------------------------------------------------------
   11. responsive · 平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding-top: 32px !important;
    padding-bottom: 32px !important;
  }

  .hero-title {
    font-size: 32px;
  }

  .hero-lead {
    max-width: none;
  }

  .topic-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .split-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }

  .index-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .page-layout.sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
  }

  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .usage-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 12px 18px;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex-basis: 100%;
    width: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 4px;
    border-top: 1px solid var(--line);
  }

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

  .nav-list a {
    min-height: 48px;
    padding: 0 4px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    border-radius: 0;
  }

  .nav-list a.is-current {
    border-bottom-color: transparent;
    border-left-color: var(--indigo);
    padding-left: 10px;
  }

  .fact-bar p,
  .home-main > section,
  .home-main > div.split-section,
  .inner-main,
  .footer-inner,
  .footer-copy {
    padding-left: 18px;
    padding-right: 18px;
  }

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

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

  .section-head h2,
  .section-title {
    font-size: 19px;
  }

  .topic-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .cover-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .guide-teaser .step-list,
  .topic-path .path-steps {
    grid-template-columns: minmax(0, 1fr);
  }

  .index-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .topic-toc {
    position: static;
    order: 2;
  }

  .topic-body {
    order: 1;
  }

  .direction-works {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

  .work-cover {
    max-width: 180px;
  }

  .method-grid,
  .rhythm-grid,
  .boundary-list,
  .usage-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .batch-items .batch-item {
    grid-template-columns: minmax(0, 1fr);
  }

  .batch-progress {
    grid-column: 1;
    grid-row: auto;
    align-self: start;
  }

  .missing-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .field-table > div,
  .field-table > p {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 32px;
  }

  .footer-desc {
    max-width: none;
  }

  .error-main {
    padding: 40px 18px;
  }

  .error-panel {
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 24px;
  }

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

  .hero-actions li {
    display: flex;
  }

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

  .cover-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .index-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-teaser .step-item,
  .path-step,
  .guide-path .step-item {
    grid-template-columns: minmax(0, 1fr);
  }

  .guide-teaser .step-no,
  .path-step .step-no {
    grid-row: auto;
  }

  .ranking-row {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 10px;
  }

  .changelog-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .error-code {
    font-size: 36px;
  }

  .error-panel h1 {
    font-size: 22px;
  }

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

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

/* --------------------------------------------------------------------------
   12. motion · 不影响初始可见性的轻量增强
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .cover-card,
  .topic-card,
  .index-item,
  .btn {
    will-change: transform;
  }
}

@media (prefers-reduced-motion: reduce) {
  .cover-card,
  .topic-card,
  .index-item,
  .btn {
    transition: none;
  }

  .cover-card:hover,
  .cover-card:focus-within,
  .topic-card:hover,
  .index-item:hover,
  .btn:hover {
    transform: none;
  }
}