/* ==========================================================================
   age动漫 · 全站样式表
   结构：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  --paper: #f7f5f1;
  --paper-soft: #fbfaf7;
  --ink: #23201c;
  --ink-soft: #6b655c;
  --wood: #7a4b2a;
  --moss: #3f6b5a;
  --line: #ddd7cd;
  --line-soft: #e8e3da;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-soft: 0 1px 2px rgba(35, 32, 28, 0.05);
  --shadow-lift: 0 6px 18px rgba(35, 32, 28, 0.09);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, sans-serif;
  --font-serif: "Songti SC", "Source Han Serif SC", "Noto Serif CJK SC", Georgia, "Times New Roman", serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --container: 1180px;
  --reading: 760px;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  line-height: 1.35;
  font-weight: 600;
}

p {
  margin: 0;
}

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

a {
  color: var(--wood);
  text-decoration: none;
  transition: color 0.18s ease, border-color 0.18s ease;
}

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 8px;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.06em;
  line-height: 1.7;
}

time {
  font-family: var(--font-mono);
  font-style: normal;
}

/* --------------------------------------------------------------------------
   layout · 骨架容器
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(247, 245, 241, 0.94);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  max-width: var(--container);
  min-height: 68px;
  margin: 0 auto;
  padding: 0 24px;
}

.site-main {
  flex: 1 0 auto;
  width: 100%;
}

.home-main {
  padding-bottom: 64px;
}

.inner-main {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 72px;
}

.site-footer {
  flex-shrink: 0;
  background-color: var(--paper-soft);
  border-top: 1px solid var(--line);
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px 40px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 32px;
}

.footer-bottom {
  border-top: 1px solid var(--line-soft);
}

.footer-bottom p {
  max-width: var(--container);
  margin: 0 auto;
  padding: 18px 24px 26px;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.7;
}

.footer-year {
  font-family: var(--font-mono);
  color: var(--ink);
}

/* --------------------------------------------------------------------------
   layout · 页头导航
   -------------------------------------------------------------------------- */
.brand {
  flex-shrink: 0;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 600;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.brand:hover {
  color: var(--wood);
}

.site-nav {
  margin-left: auto;
}

.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;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  font-size: 15px;
  white-space: nowrap;
}

.nav-list a:hover {
  color: var(--ink);
  background-color: rgba(122, 75, 42, 0.07);
}

.nav-list a.is-current {
  color: var(--wood);
  font-weight: 600;
  background-color: rgba(122, 75, 42, 0.09);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  margin-left: auto;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: transparent;
  cursor: pointer;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--ink);
  transition: transform 0.2s ease, opacity 0.2s ease;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* --------------------------------------------------------------------------
   layout · 内页骨架：面包屑 / 页面标题区
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 22px 0 0;
  color: var(--ink-soft);
  font-size: 13px;
}

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

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

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

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

.page-header {
  max-width: var(--reading);
  padding: 20px 0 40px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 44px;
}

.page-description {
  margin-bottom: 10px;
  color: var(--ink-soft);
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.page-title {
  color: var(--ink);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
}

.page-lead {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 16px;
}

/* --------------------------------------------------------------------------
   components · 通用区块标题
   -------------------------------------------------------------------------- */
.section-head {
  max-width: var(--reading);
  margin-bottom: 28px;
}

.section-head h2,
.section-title,
.section h2 {
  color: var(--ink);
  font-size: 22px;
  font-weight: 600;
}

.section-head p,
.section-desc,
.section-note,
.section-intro {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
}

.section-title {
  margin-bottom: 10px;
}

.section-desc,
.section-note {
  max-width: var(--reading);
}

.section-intro {
  max-width: var(--reading);
  margin-bottom: 26px;
}

.section {
  margin-bottom: 56px;
}

.section-more {
  margin-top: 20px;
  font-size: 15px;
}

.section-more a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 2px;
}

.section-more a:hover {
  border-color: var(--moss);
}

/* --------------------------------------------------------------------------
   components · 首页事实条
   -------------------------------------------------------------------------- */
.fact-bar {
  background-color: var(--ink);
  color: rgba(247, 245, 241, 0.86);
}

.fact-bar p {
  max-width: var(--container);
  margin: 0 auto;
  padding: 9px 24px;
  font-size: 13px;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   components · 页脚
   -------------------------------------------------------------------------- */
.footer-title {
  margin-bottom: 14px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.footer-links li + li {
  margin-top: 8px;
}

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

.footer-links a:hover {
  color: var(--wood);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.hero-zone {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px 48px;
  align-items: start;
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 64px;
}

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

.hero-kicker {
  color: var(--moss);
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.1em;
}

.hero-title {
  margin-top: 14px;
  color: var(--ink);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.28;
}

.hero-summary {
  max-width: 560px;
  margin-top: 18px;
  color: var(--ink-soft);
  font-size: 16px;
}

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

.hero-entries .entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  color: var(--ink);
  font-size: 15px;
}

.hero-entries .entry-link:hover {
  color: var(--wood);
  border-color: var(--wood);
  box-shadow: var(--shadow-soft);
  transform: translateY(-1px);
}

.hero-figure {
  grid-column: 2;
  grid-row: 1 / span 2;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

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

.hero-figure figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-soft);
}

.content-media {
  grid-column: 1;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

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

.content-media figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-soft);
}

.content-media-primary {
  grid-column: 2;
  grid-row: 3;
}

/* 题材方向总览 */
.topics-overview {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.topics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.topic-card {
  display: flex;
  flex-direction: column;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.topic-card:hover {
  border-color: var(--wood);
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
}

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

.topic-trait {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.topic-scope {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.topic-sample {
  margin-top: auto;
  padding-top: 14px;
  font-size: 14px;
}

.topic-sample a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.topic-sample a:hover {
  border-color: var(--moss);
}

/* 更新批次 + 位次参考并列区 */
.split-zone {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px 40px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.updates-summary,
.ranking-summary {
  min-width: 0;
  padding: 26px 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.batch-timeline {
  position: relative;
  padding-left: 20px;
  border-left: 1px solid var(--line);
}

.batch-item {
  position: relative;
  padding: 0 0 18px 4px;
}

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

.batch-item::before {
  content: "";
  position: absolute;
  top: 8px;
  left: -25px;
  width: 7px;
  height: 7px;
  border: 1px solid var(--wood);
  border-radius: 50%;
  background-color: var(--paper);
}

.batch-date {
  display: block;
  color: var(--wood);
  font-size: 13px;
}

.batch-meta {
  margin-top: 4px;
  color: var(--ink-soft);
  font-size: 14px;
}

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

.rank-row {
  display: flex;
  align-items: baseline;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line-soft);
}

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

.rank-no {
  flex-shrink: 0;
  width: 26px;
  color: var(--moss);
  font-family: var(--font-mono);
  font-size: 14px;
}

.rank-name {
  min-width: 0;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
}

.rank-topic {
  margin-left: auto;
  flex-shrink: 0;
  color: var(--ink-soft);
  font-size: 13px;
}

/* 条目字段口径与收录边界摘要 */
.fields-summary {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.fields-split {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 40px;
}

.fields-col {
  min-width: 0;
  padding: 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.col-title {
  margin-bottom: 14px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.field-name-list li {
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
}

.field-name-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

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

.field-note-list li {
  padding: 9px 0;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
  font-size: 14px;
}

.field-note-list li:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.field-note {
  color: var(--ink);
  font-weight: 600;
}

/* 查阅路径三步指引 */
.guide-summary {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.guide-summary .step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.guide-summary .step-block {
  display: flex;
  flex-direction: column;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-top: 2px solid var(--wood);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.guide-summary .step-no {
  color: var(--wood);
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.06em;
}

.guide-summary .step-name {
  margin-top: 8px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.guide-summary .step-desc {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.guide-summary .step-next {
  margin-top: auto;
  padding-top: 14px;
  font-size: 14px;
}

.guide-summary .step-next a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.guide-summary .step-next a:hover {
  border-color: var(--moss);
}

.feedback-note {
  margin-top: 24px;
  padding: 20px 22px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.feedback-title {
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.feedback-note p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

/* 站内栏目索引 */
.site-index {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.index-cell a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
  padding: 10px 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  color: var(--ink);
  font-size: 14px;
  text-align: center;
}

.index-cell a:hover {
  color: var(--wood);
  border-color: var(--wood);
  box-shadow: var(--shadow-soft);
}

/* --------------------------------------------------------------------------
   pages · 题材分类
   -------------------------------------------------------------------------- */
.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.topic-cell {
  display: flex;
  flex-direction: column;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.topic-cell .topic-range {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.section-topic-detail .topic-block {
  display: grid;
  grid-template-columns: minmax(0, 300px) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
  padding: 26px 0;
  border-top: 1px solid var(--line);
}

.section-topic-detail .topic-block:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.topic-media {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

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

.topic-media figcaption {
  padding: 10px 14px 12px;
  border-top: 1px solid var(--line-soft);
}

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

.topic-body h3 {
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.topic-body p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 15px;
}

.topic-list {
  margin-top: 14px;
}

.topic-list li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.topic-list li + li {
  margin-top: 8px;
}

.topic-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--moss);
}

.diff-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--paper-soft);
}

.diff-row {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: 20px;
  padding: 14px 20px;
  border-top: 1px solid var(--line-soft);
}

.diff-row:first-child {
  border-top: 0;
}

.diff-head {
  background-color: rgba(122, 75, 42, 0.06);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.08em;
}

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

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

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

.enter-card {
  display: block;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  color: var(--ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.enter-card:hover {
  border-color: var(--wood);
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
}

.enter-card h3 {
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.enter-card p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   pages · 最近更新
   -------------------------------------------------------------------------- */
.page-layout {
  display: block;
}

.section-timeline .timeline-list {
  position: relative;
  padding-left: 26px;
  border-left: 1px solid var(--line);
}

.timeline-item {
  position: relative;
  padding-bottom: 22px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: "";
  position: absolute;
  top: 12px;
  left: -31px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--wood);
  border-radius: 50%;
  background-color: var(--paper);
}

.batch-card {
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.batch-head {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px 14px;
}

.batch-card .batch-date {
  color: var(--wood);
  font-size: 13px;
}

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

.batch-type {
  padding: 2px 10px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--moss);
  font-size: 12px;
}

.batch-name {
  margin-top: 12px;
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.batch-text {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.batch-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 14px;
}

.batch-tags .tag {
  padding: 3px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background-color: var(--paper);
  color: var(--ink-soft);
  font-size: 13px;
}

.batch-topics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.batch-topic-col {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.batch-topic-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.batch-topic-count {
  margin-top: 8px;
  color: var(--wood);
  font-family: var(--font-mono);
  font-size: 13px;
}

.batch-topic-note {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.change-type-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.change-type-col {
  padding: 20px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--moss);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.change-type-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.change-type-desc {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.batch-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

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

.batch-figure figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-soft);
}

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

.backlink-item {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.backlink-item a {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.backlink-item a:hover {
  color: var(--wood);
}

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

/* --------------------------------------------------------------------------
   pages · 人气位次
   -------------------------------------------------------------------------- */
.rank-section .rank-media {
  overflow: hidden;
  margin-bottom: 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.rank-section .rank-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.rank-section .rank-media figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-soft);
}

.rank-section .rank-list {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--paper-soft);
}

.rank-section .rank-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 22px;
  border-bottom: 1px solid var(--line-soft);
}

.rank-section .rank-row:last-child {
  border-bottom: 0;
  padding-bottom: 18px;
}

.rank-section .rank-no {
  width: auto;
  color: var(--wood);
  font-family: var(--font-mono);
  font-size: 18px;
  line-height: 1.5;
}

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

.rank-section .rank-name {
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.rank-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  margin-top: 6px;
  font-size: 13px;
}

.rank-section .rank-topic {
  margin-left: 0;
  color: var(--moss);
}

.rank-state {
  color: var(--ink-soft);
}

.rank-desc {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.basis-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.basis-col {
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.basis-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.basis-col p {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.limit-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.limit-item {
  padding: 20px;
  border: 1px dashed var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.limit-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

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

.entry-section .entry-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.entry-section .entry-card {
  display: block;
  padding: 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  color: var(--ink);
  transition: border-color 0.18s ease, box-shadow 0.18s ease, transform 0.18s ease;
}

.entry-section .entry-card:hover {
  border-color: var(--wood);
  box-shadow: var(--shadow-lift);
  transform: translateY(-2px);
}

.entry-section .entry-name {
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.entry-section .entry-card p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.rank-aside {
  margin-top: 8px;
  padding: 22px 24px;
  border: 1px solid var(--line);
  border-left: 2px solid var(--wood);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.rank-aside h2 {
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.rank-aside p {
  margin-top: 10px;
  max-width: var(--reading);
  color: var(--ink-soft);
  font-size: 14px;
}

/* --------------------------------------------------------------------------
   pages · 条目字段说明
   -------------------------------------------------------------------------- */
.field-media h2 {
  margin-bottom: 16px;
  color: var(--ink);
  font-size: 22px;
  font-weight: 600;
}

.media-figure {
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.media-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.media-figure figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-soft);
}

.field-meaning,
.field-range,
.field-boundary,
.field-entry {
  margin-bottom: 56px;
}

.field-meaning h2,
.field-range h2,
.field-boundary h2,
.field-entry h2 {
  color: var(--ink);
  font-size: 22px;
  font-weight: 600;
}

.field-table,
.range-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background-color: var(--paper-soft);
}

.field-row {
  display: grid;
  grid-template-columns: minmax(0, 220px) minmax(0, 1fr);
  gap: 20px;
  padding: 14px 20px;
  border-top: 1px solid var(--line-soft);
}

.field-row:first-child {
  border-top: 0;
}

.field-row-head {
  background-color: rgba(122, 75, 42, 0.06);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.08em;
}

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

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

.range-row {
  display: grid;
  grid-template-columns: minmax(0, 200px) minmax(0, 260px) minmax(0, 1fr);
  gap: 20px;
  padding: 14px 20px;
  border-top: 1px solid var(--line-soft);
}

.range-row:first-child {
  border-top: 0;
}

.range-row-head {
  background-color: rgba(63, 107, 90, 0.07);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 13px;
  letter-spacing: 0.08em;
}

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

.range-value {
  color: var(--moss);
  font-size: 14px;
}

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

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px 32px;
}

.boundary-col {
  padding: 22px 22px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.boundary-col h3 {
  margin-bottom: 14px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.boundary-col-in {
  border-top: 2px solid var(--moss);
}

.boundary-col-out {
  border-top: 2px solid var(--line);
}

.boundary-list li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.boundary-list li + li {
  margin-top: 9px;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--wood);
}

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

.entry-links li a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 54px;
  padding: 12px 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  color: var(--ink);
  font-size: 15px;
  text-align: center;
}

.entry-links li a:hover {
  color: var(--wood);
  border-color: var(--wood);
  box-shadow: var(--shadow-soft);
}

/* --------------------------------------------------------------------------
   pages · 查阅路径指引
   -------------------------------------------------------------------------- */
.guide-visual {
  overflow: hidden;
  margin-bottom: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.guide-visual img {
  width: 100%;
  height: auto;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.guide-visual figcaption {
  padding: 12px 16px 14px;
  border-top: 1px solid var(--line-soft);
}

.guide-steps .step-list {
  display: grid;
  gap: 18px;
}

.guide-steps .step-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 24px 24px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.guide-steps .step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 64px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--paper);
  color: var(--wood);
  font-family: var(--font-mono);
  font-size: 15px;
}

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

.guide-steps .step-title {
  color: var(--ink);
  font-size: 17px;
  font-weight: 600;
}

.guide-steps .step-body p {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.guide-steps .step-next {
  margin-top: 12px;
  font-size: 14px;
}

.guide-steps .step-next a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.guide-steps .step-next a:hover {
  border-color: var(--moss);
}

.entry-compare .entry-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.entry-compare .entry-card {
  display: flex;
  flex-direction: column;
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.entry-compare .entry-name {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.entry-compare .entry-scene {
  margin-top: 10px;
  color: var(--ink-soft);
  font-size: 14px;
}

.entry-compare .entry-way {
  margin-top: 8px;
  color: var(--ink-soft);
  font-size: 14px;
}

.entry-compare .entry-link {
  margin-top: auto;
  padding-top: 14px;
  font-size: 14px;
}

.entry-compare .entry-link a {
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

.entry-compare .entry-link a:hover {
  border-color: var(--moss);
}

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

.feedback-block {
  padding: 22px 20px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.feedback-block h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 0.08em;
}

.feedback-list li {
  position: relative;
  padding-left: 16px;
  color: var(--ink-soft);
  font-size: 14px;
}

.feedback-list li + li {
  margin-top: 8px;
}

.feedback-list li::before {
  content: "";
  position: absolute;
  top: 11px;
  left: 0;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--moss);
}

.guide-faq .faq-item {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
}

.guide-faq .faq-item + .faq-item {
  margin-top: 12px;
}

.guide-faq summary {
  position: relative;
  padding: 16px 48px 16px 20px;
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.guide-faq summary::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 20px;
  transform: translateY(-50%);
  color: var(--wood);
  font-family: var(--font-mono);
  font-size: 18px;
}

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

.guide-faq .faq-item p {
  padding: 0 20px 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

.related-nav {
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.related-nav h2 {
  margin-bottom: 16px;
  color: var(--ink);
  font-size: 20px;
  font-weight: 600;
}

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

.related-list li a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  color: var(--ink);
  font-size: 14px;
}

.related-list li a:hover {
  color: var(--wood);
  border-color: var(--wood);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 72px 24px 88px;
}

.error-panel {
  width: 100%;
  max-width: 620px;
  text-align: center;
}

.error-code {
  color: var(--wood);
  font-family: var(--font-mono);
  font-size: 15px;
  letter-spacing: 0.14em;
}

.error-panel h1 {
  margin-top: 14px;
  color: var(--ink);
  font-size: 30px;
  font-weight: 600;
}

.error-lead {
  margin-top: 14px;
  color: var(--ink-soft);
  font-size: 15px;
}

.error-entries {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  margin-top: 26px;
}

.error-entries li a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper-soft);
  color: var(--ink);
  font-size: 14px;
}

.error-entries li a:hover {
  color: var(--wood);
  border-color: var(--wood);
}

.error-actions {
  margin-top: 28px;
}

.btn-home {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 26px;
  border: 1px solid var(--wood);
  border-radius: var(--radius);
  background-color: var(--wood);
  color: var(--paper);
  font-size: 15px;
}

.btn-home:hover {
  background-color: var(--moss);
  border-color: var(--moss);
  color: var(--paper);
}

/* --------------------------------------------------------------------------
   responsive · 1024px
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-zone {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 44px 24px 52px;
  }

  .hero-figure {
    grid-column: 1;
    grid-row: 1;
  }

  .hero-copy {
    grid-column: 1;
    grid-row: 2;
  }

  .content-media,
  .content-media-primary {
    grid-column: 1;
    grid-row: auto;
  }

  .hero-title {
    font-size: 34px;
  }

  .topics-grid,
  .topic-grid,
  .batch-topics-grid,
  .change-type-grid,
  .basis-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .guide-summary .step-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .section-topic-detail .topic-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .enter-grid,
  .limit-list,
  .entry-section .entry-grid,
  .entry-links,
  .backlink-list,
  .feedback-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

/* --------------------------------------------------------------------------
   responsive · 720px
   -------------------------------------------------------------------------- */
@media (max-width: 720px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
    gap: 0;
    min-height: 60px;
    padding: 8px 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex-basis: 100%;
    width: 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0 10px;
  }

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

  .nav-list li {
    display: block;
  }

  .nav-list a {
    width: 100%;
    padding: 0 12px;
    border-radius: var(--radius-sm);
  }

  .fact-bar p {
    padding: 8px 16px;
    font-size: 12px;
  }

  .inner-main {
    padding: 0 16px 56px;
  }

  .hero-zone {
    padding: 32px 16px 44px;
  }

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

  .hero-summary {
    font-size: 15px;
  }

  .hero-entries {
    gap: 10px;
  }

  .hero-entries .entry-link {
    flex: 1 1 100%;
    justify-content: center;
  }

  .topics-overview,
  .split-zone,
  .fields-summary,
  .guide-summary,
  .site-index {
    padding-left: 16px;
    padding-right: 16px;
    padding-bottom: 48px;
  }

  .topics-grid,
  .topic-grid,
  .batch-topics-grid,
  .change-type-grid,
  .basis-grid,
  .enter-grid,
  .limit-list,
  .entry-section .entry-grid,
  .entry-links,
  .backlink-list,
  .feedback-columns,
  .entry-compare .entry-grid {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .page-header {
    padding: 16px 0 28px;
    margin-bottom: 32px;
  }

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

  .section-head h2,
  .section-title,
  .section h2,
  .field-media h2,
  .field-meaning h2,
  .field-range h2,
  .field-boundary h2,
  .field-entry h2 {
    font-size: 20px;
  }

  .section {
    margin-bottom: 40px;
  }

  .section-timeline .timeline-list {
    padding-left: 20px;
  }

  .timeline-item::before {
    left: -25px;
  }

  .batch-card {
    padding: 18px 16px;
  }

  .rank-section .rank-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 12px;
    padding: 16px 16px;
  }

  .rank-section .rank-row:last-child {
    padding-bottom: 16px;
  }

  .rank-section .rank-no {
    font-size: 16px;
  }

  .field-row,
  .range-row,
  .diff-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    padding: 14px 16px;
  }

  .field-row-head,
  .range-row-head,
  .diff-head {
    display: none;
  }

  .guide-steps .step-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
    padding: 20px 18px;
  }

  .guide-steps .step-number {
    width: 56px;
  }

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

  .error-main {
    padding: 48px 16px 64px;
  }

  .error-panel h1 {
    font-size: 24px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 36px 16px 24px;
  }

  .footer-bottom p {
    padding: 16px 16px 22px;
  }
}