/* ==========================================================================
   禁漫天堂 henkb.cn — 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base — 变量、重置、排版基准
   -------------------------------------------------------------------------- */
:root {
  --c-bg: #f4f2ee;
  --c-surface: #fbfaf8;
  --c-surface-alt: #ece8e2;
  --c-ink: #1c1a17;
  --c-ink-soft: #6b655c;
  --c-ink-faint: #8d867c;
  --c-accent: #b23a2f;
  --c-accent-dark: #8e2b22;
  --c-line: #ded8cf;
  --c-line-strong: #c9c1b6;
  --c-cover: #2a2724;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC",
    "Noto Sans CJK SC", "Heiti SC", Arial, sans-serif;

  --w-container: 1180px;
  --w-narrow: 820px;
  --radius: 6px;
  --radius-sm: 4px;

  --gap-xs: 8px;
  --gap-sm: 14px;
  --gap-md: 22px;
  --gap-lg: 36px;
  --gap-xl: 56px;

  --lh-tight: 1.3;
  --lh-base: 1.75;
}

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

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

body {
  margin: 0;
  background-color: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: var(--lh-base);
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: var(--lh-tight);
  color: var(--c-ink);
}

p {
  margin: 0;
}

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

dl, dd, dt, figure, figcaption {
  margin: 0;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
  border: 0;
}

a {
  color: var(--c-ink);
  text-decoration: none;
  transition: color 0.18s ease;
}

a:hover {
  color: var(--c-accent);
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--c-accent);
  outline-offset: 2px;
}

strong {
  font-weight: 700;
  color: var(--c-ink);
}

/* --------------------------------------------------------------------------
   layout — 站点骨架：页头、导航、主容器、面包屑、页脚
   -------------------------------------------------------------------------- */

/* 页头与主导航 */
.site-header {
  background-color: var(--c-bg);
  border-bottom: 1px solid var(--c-line);
  position: relative;
  z-index: 20;
}

.header-inner {
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: var(--gap-md);
  flex-wrap: wrap;
}

.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--c-ink);
  letter-spacing: 0;
}

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

.brand-sub {
  font-size: 12px;
  font-weight: 400;
  color: var(--c-ink-soft);
  border-left: 1px solid var(--c-line-strong);
  padding-left: 10px;
  line-height: 1.2;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--c-line-strong);
  border-radius: var(--radius-sm);
  background-color: transparent;
  color: var(--c-ink);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background-color: currentColor;
}

.nav-toggle::before {
  top: 17px;
}

.nav-toggle::after {
  top: 25px;
}

.nav-toggle[aria-expanded="true"]::before {
  top: 21px;
  transform: rotate(45deg);
}

.nav-toggle[aria-expanded="true"]::after {
  top: 21px;
  transform: rotate(-45deg);
}

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

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

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--c-ink-soft);
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  color: var(--c-ink);
}

.nav-link.is-current {
  color: var(--c-ink);
  font-weight: 700;
  border-bottom-color: var(--c-accent);
}

/* 主内容容器 */
.site-main {
  display: block;
}

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

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

/* 面包屑 */
.breadcrumb {
  padding: 20px 0 0;
  font-size: 13px;
  color: var(--c-ink-faint);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

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

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

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

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

/* 内页页面标题区 */
.page-header {
  padding: 18px 0 30px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: var(--gap-lg);
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--c-ink);
}

.page-description {
  margin-top: 12px;
  max-width: var(--w-narrow);
  font-size: 15px;
  color: var(--c-ink-soft);
}

/* 通用 section 节奏 */
.section {
  margin-bottom: var(--gap-xl);
}

.section-head {
  margin-bottom: var(--gap-md);
}

.section-title {
  font-size: 24px;
  font-weight: 700;
  color: var(--c-ink);
}

.section-desc,
.section-intro,
.section-lead,
.section-lede {
  margin-top: 10px;
  max-width: var(--w-narrow);
  font-size: 15px;
  color: var(--c-ink-soft);
}

.section-intro a,
.section-tail a,
.col-note a,
.steps-note a,
.legend-note a,
.summary-note a,
.field-table-note a,
.fields-order-note a {
  color: var(--c-accent);
  border-bottom: 1px solid rgba(178, 58, 47, 0.35);
}

.section-intro a:hover,
.section-tail a:hover,
.col-note a:hover,
.steps-note a:hover,
.legend-note a:hover,
.summary-note a:hover,
.field-table-note a:hover,
.fields-order-note a:hover {
  color: var(--c-accent-dark);
  border-bottom-color: var(--c-accent-dark);
}

.section-tail {
  margin-top: var(--gap-md);
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* 页脚 */
.site-footer {
  margin-top: 40px;
  background-color: var(--c-surface-alt);
  border-top: 1px solid var(--c-line);
}

.footer-inner {
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 46px 24px 30px;
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(140px, 1fr));
  gap: var(--gap-lg);
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
}

.footer-brand-desc {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-ink-soft);
  max-width: 300px;
}

.footer-col-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--c-line-strong);
}

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

.footer-links a {
  font-size: 13px;
  color: var(--c-ink-soft);
}

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

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

.footer-copy {
  max-width: var(--w-container);
  margin: 0 auto;
  padding: 18px 24px;
  font-size: 12px;
  color: var(--c-ink-faint);
}

/* --------------------------------------------------------------------------
   components — 复用组件：图、卡片、清单、表格、折叠项、按钮
   -------------------------------------------------------------------------- */

/* 图片容器统一约束 */
.hero-figure,
.genre-cover,
.entry-cover,
.updates-figure,
.fields-figure,
.hierarchy-figure {
  overflow: hidden;
  border-radius: var(--radius);
  background-color: var(--c-cover);
}

.hero-figure img,
.genre-cover img,
.entry-cover img,
.updates-figure img,
.fields-figure img,
.hierarchy-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  background-color: var(--c-cover);
  aspect-ratio: 3 / 4;
}

.updates-figure img,
.fields-figure img,
.hierarchy-figure img {
  aspect-ratio: 16 / 9;
}

figcaption {
  font-size: 12px;
  color: var(--c-ink-faint);
  line-height: 1.5;
}

.hero-figure figcaption,
.genre-cover figcaption,
.entry-caption,
.figure-caption,
.hierarchy-caption {
  padding: 8px 10px;
  background-color: var(--c-surface);
  border-top: 1px solid var(--c-line);
}

/* 两栏容器：主内容在左、侧栏在右 */
.two-col {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: var(--gap-lg);
  align-items: start;
}

.col-main {
  min-width: 0;
}

.col-side {
  min-width: 0;
  padding-left: var(--gap-md);
  border-left: 1px solid var(--c-line);
}

.col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--c-ink);
}

.col-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--c-ink-soft);
}

/* 字段小表 */
.field-mini-list,
.field-table-mini {
  display: grid;
  grid-template-columns: minmax(80px, 0.7fr) minmax(0, 1.6fr);
  gap: 0;
}

.field-mini-list dt,
.field-table-mini dt {
  padding: 10px 12px 10px 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-ink);
  border-top: 1px solid var(--c-line);
}

.field-mini-list dd,
.field-table-mini dd {
  padding: 10px 0;
  font-size: 13px;
  color: var(--c-ink-soft);
  border-top: 1px solid var(--c-line);
}

/* 边界要点列表 */
.boundary-list {
  display: grid;
  gap: 12px;
}

.boundary-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--c-accent);
  border-radius: 50%;
}

/* 变动清单 */
.change-list {
  display: grid;
}

.change-row {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr) 96px;
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
}

.change-date {
  font-size: 13px;
  color: var(--c-ink-faint);
  font-variant-numeric: tabular-nums;
}

.change-name {
  font-weight: 700;
  color: var(--c-ink);
}

.change-type,
.change-genre,
.change-status {
  font-size: 13px;
  color: var(--c-ink-soft);
}

.change-type {
  text-align: right;
}

/* 榜单位次 */
.rank-list {
  display: grid;
}

.rank-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 10px;
  padding: 12px 0;
  border-top: 1px solid var(--c-line);
}

.rank-no {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}

.rank-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-ink);
}

.rank-note {
  grid-column: 2;
  margin-top: 4px;
  font-size: 13px;
  color: var(--c-ink-soft);
}

/* 编号步骤清单（首页） */
.step-list {
  display: grid;
  gap: 0;
}

.step-row {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 18px 0;
  border-top: 1px solid var(--c-line);
}

.step-row:last-child {
  border-bottom: 1px solid var(--c-line);
}

.step-no {
  font-size: 20px;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}

.step-text {
  font-size: 15px;
  color: var(--c-ink-soft);
}

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

/* 折叠项（FAQ） */
.faq-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--c-line);
}

.faq-item {
  border-bottom: 1px solid var(--c-line);
}

.faq-question {
  padding: 16px 34px 16px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  cursor: pointer;
  position: relative;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  font-weight: 400;
  color: var(--c-accent);
  line-height: 1;
}

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

.faq-answer {
  padding: 0 0 18px;
  max-width: 72ch;
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* 按钮（404） */
.btn {
  display: inline-block;
  padding: 12px 24px;
  font-size: 15px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--c-ink);
  min-height: 44px;
  line-height: 1.4;
}

.btn-primary {
  background-color: var(--c-ink);
  color: var(--c-bg);
}

.btn-primary:hover {
  background-color: var(--c-accent);
  border-color: var(--c-accent);
  color: #fff;
}

.btn-ghost {
  background-color: transparent;
  color: var(--c-ink);
}

.btn-ghost:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

/* --------------------------------------------------------------------------
   pages — 各页面业务模块
   -------------------------------------------------------------------------- */

/* ---------- 首页 ---------- */

/* 首屏定位区 */
.hero-section {
  padding: 44px 0 var(--gap-xl);
  border-bottom: 1px solid var(--c-line);
  margin-bottom: var(--gap-xl);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
  gap: var(--gap-xl);
  align-items: start;
}

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

.hero-kicker {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
  padding-bottom: 12px;
}

.hero-title {
  font-size: 44px;
  font-weight: 700;
  color: var(--c-ink);
  max-width: 20ch;
}

.hero-desc {
  margin-top: 18px;
  max-width: 52ch;
  font-size: 16px;
  color: var(--c-ink-soft);
}

.hero-paths {
  margin-top: 28px;
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--c-line);
  padding-top: 18px;
}

.hero-paths li {
  min-width: 0;
}

.path-link {
  display: block;
  padding: 12px 16px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius-sm);
  min-height: 44px;
}

.path-link:hover {
  background-color: #fff;
  color: var(--c-accent);
  border-color: var(--c-line-strong);
  border-left-color: var(--c-accent-dark);
}

.hero-media {
  min-width: 0;
  display: grid;
  gap: var(--gap-md);
}

.field-card {
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.field-card-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.field-card-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-ink-soft);
}

.field-card-note a {
  color: var(--c-accent);
  border-bottom: 1px solid rgba(178, 58, 47, 0.35);
}

/* 题材方向总览 */
.genres-overview {
  margin-bottom: var(--gap-xl);
}

.genre-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-md);
}

.genre-col {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 18px 16px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-ink);
  border-radius: var(--radius);
}

.genre-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
}

.genre-feature {
  font-size: 13px;
  color: var(--c-ink-soft);
  min-height: 42px;
}

.genre-cover {
  margin-top: 2px;
}

.genre-scale {
  font-size: 12px;
  color: var(--c-ink-faint);
}

.genre-more {
  margin-top: auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
  padding-top: 4px;
  border-top: 1px solid var(--c-line);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.genre-more:hover {
  color: var(--c-accent-dark);
}

/* 字段与边界摘要 / 更新与榜单 */
.fields-summary,
.updates-rank {
  margin-bottom: var(--gap-xl);
}

/* 站内栏目索引 */
.site-index {
  margin-bottom: var(--gap-lg);
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: var(--gap-sm);
}

.index-col {
  min-width: 0;
  padding: 16px 14px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.index-name {
  font-size: 15px;
  font-weight: 700;
}

.index-name a {
  display: inline-block;
  min-height: 24px;
  color: var(--c-ink);
}

.index-name a:hover {
  color: var(--c-accent);
}

.index-desc {
  margin-top: 8px;
  font-size: 12px;
  color: var(--c-ink-soft);
}

/* ---------- 题材分类页 ---------- */

.section-scope {
  margin-bottom: var(--gap-xl);
}

.scope-body {
  display: grid;
  gap: 12px;
  padding: 20px 22px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.scope-text {
  font-size: 15px;
  color: var(--c-ink-soft);
  max-width: 74ch;
}

.section-directions {
  margin-bottom: var(--gap-xl);
}

.direction-block {
  padding: 26px 0;
  border-top: 1px solid var(--c-line);
}

.direction-block:last-of-type {
  border-bottom: 1px solid var(--c-line);
}

.direction-layout {
  display: grid;
  grid-template-columns: minmax(240px, 0.9fr) minmax(0, 1.6fr);
  gap: var(--gap-lg);
  align-items: start;
}

.direction-info {
  min-width: 0;
}

.direction-name {
  font-size: 21px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--c-accent);
  display: inline-block;
}

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

.direction-scale {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-ink-faint);
}

.direction-entry {
  margin-top: 10px;
  font-size: 13px;
  color: var(--c-ink-soft);
}

.direction-entries {
  min-width: 0;
  display: grid;
  grid-template-columns: minmax(150px, 200px) minmax(0, 1fr);
  gap: var(--gap-md);
  align-items: start;
}

.entry-cover {
  min-width: 0;
}

.entry-list {
  display: grid;
  min-width: 0;
}

.entry-item {
  padding: 10px 0;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
  color: var(--c-ink-soft);
}

.entry-item:first-child {
  border-top: 0;
  padding-top: 0;
}

.entry-name {
  font-weight: 700;
  color: var(--c-ink);
}

.entry-status {
  margin-left: 10px;
  font-size: 12px;
  color: var(--c-ink-faint);
}

.section-direction-fields {
  margin-bottom: var(--gap-xl);
}

.field-position-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
}

.field-position-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.field-position-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--c-line);
}

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

/* ---------- 更新记录页 ---------- */

.updates-intro {
  margin-bottom: var(--gap-lg);
}

.intro-points {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.intro-point {
  position: relative;
  padding: 12px 16px 12px 34px;
  font-size: 14px;
  color: var(--c-ink-soft);
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
}

.intro-point::before {
  content: "";
  position: absolute;
  left: 16px;
  top: 20px;
  width: 6px;
  height: 6px;
  background-color: var(--c-accent);
  border-radius: 50%;
}

.updates-figure {
  margin-bottom: var(--gap-xl);
}

.updates-list {
  margin-bottom: var(--gap-xl);
}

.updates-group {
  padding: 22px 0;
  border-top: 1px solid var(--c-line);
}

.updates-group:last-of-type {
  border-bottom: 1px solid var(--c-line);
}

.updates-group-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 12px;
}

.change-rows {
  display: grid;
}

.updates-list .change-row {
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 0.9fr) minmax(0, 0.9fr) minmax(0, 0.8fr);
  gap: 14px;
}

.updates-list .change-type,
.updates-list .change-status,
.updates-list .change-genre {
  text-align: left;
}

.updates-legend {
  margin-bottom: var(--gap-xl);
}

.legend-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-lg);
}

.legend-col {
  min-width: 0;
}

.legend-col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--c-ink);
}

.legend-list {
  display: grid;
  grid-template-columns: minmax(96px, 0.7fr) minmax(0, 1.6fr);
}

.legend-term {
  padding: 10px 12px 10px 0;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-ink);
  border-top: 1px solid var(--c-line);
}

.legend-desc {
  padding: 10px 0;
  font-size: 13px;
  color: var(--c-ink-soft);
  border-top: 1px solid var(--c-line);
}

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

.updates-summary {
  margin-bottom: var(--gap-xl);
}

.summary-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-md);
}

.summary-col {
  min-width: 0;
  padding: 18px 16px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-top: 3px solid var(--c-accent);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.summary-col-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}

.summary-count {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
}

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

.summary-link {
  margin-top: auto;
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
  padding-top: 8px;
  border-top: 1px solid var(--c-line);
  min-height: 32px;
  display: inline-flex;
  align-items: center;
}

.summary-link:hover {
  color: var(--c-accent-dark);
}

.summary-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--c-ink-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

/* ---------- 条目字段说明页 ---------- */

.section-fields-overview {
  margin-bottom: var(--gap-xl);
}

.fields-overview-body {
  display: grid;
  grid-template-columns: minmax(220px, 0.8fr) minmax(0, 1.4fr);
  gap: var(--gap-lg);
  align-items: start;
}

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

.fields-order {
  min-width: 0;
}

.subsection-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 10px;
  margin-bottom: 14px;
  border-bottom: 2px solid var(--c-ink);
}

.order-list {
  display: grid;
}

.order-item {
  display: grid;
  grid-template-columns: 40px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-top: 1px solid var(--c-line);
  font-size: 14px;
  color: var(--c-ink-soft);
}

.order-index {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-accent);
  font-variant-numeric: tabular-nums;
}

.fields-order-note {
  margin-top: 14px;
  font-size: 13px;
  color: var(--c-ink-soft);
}

.section-fields-table {
  margin-bottom: var(--gap-xl);
}

.field-table {
  border-top: 2px solid var(--c-ink);
  border-bottom: 1px solid var(--c-line);
}

.field-row {
  display: grid;
  grid-template-columns: minmax(110px, 0.7fr) minmax(0, 1.8fr) minmax(0, 1.1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--c-line);
  align-items: baseline;
}

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

.field-row-head {
  background-color: var(--c-surface-alt);
  padding: 12px 12px;
  border-bottom: 1px solid var(--c-line-strong);
}

.field-row-head .field-cell {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-ink);
}

.field-cell {
  min-width: 0;
}

.field-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--c-ink);
}

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

.field-sample {
  font-size: 13px;
  color: var(--c-ink-faint);
}

.field-table-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.section-boundaries {
  margin-bottom: var(--gap-xl);
}

.section-boundaries .boundary-list {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
}

.section-boundaries .boundary-list li {
  padding: 16px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-accent);
  border-radius: var(--radius-sm);
}

.section-boundaries .boundary-list li::before {
  display: none;
}

.boundary-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 6px;
}

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

.section-misread {
  margin-bottom: var(--gap-xl);
}

.section-related {
  margin-bottom: var(--gap-lg);
}

.related-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-md);
}

.related-item {
  min-width: 0;
  padding: 16px 14px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.related-item a {
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  min-height: 24px;
}

.related-item a:hover {
  color: var(--c-accent);
}

.related-desc {
  font-size: 12px;
  color: var(--c-ink-soft);
}

/* ---------- 查阅路径指引页 ---------- */

.guide-steps,
.guide-evidence,
.guide-hierarchy,
.guide-faq {
  margin-bottom: var(--gap-xl);
}

.guide-steps .step-list {
  border-top: 2px solid var(--c-ink);
}

.guide-steps .step-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  gap: 6px 18px;
  align-items: start;
  padding: 22px 0;
  border-bottom: 1px solid var(--c-line);
}

.guide-steps .step-item .step-no {
  grid-row: span 3;
  font-size: 24px;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}

.step-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
}

.guide-steps .step-item .step-text {
  font-size: 15px;
  color: var(--c-ink-soft);
}

.step-next {
  font-size: 13px;
  color: var(--c-ink-faint);
}

.step-next a {
  color: var(--c-accent);
  border-bottom: 1px solid rgba(178, 58, 47, 0.35);
}

.step-next a:hover {
  color: var(--c-accent-dark);
}

.evidence-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.evidence-card {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.evidence-no {
  font-size: 13px;
  font-weight: 700;
  color: var(--c-accent);
}

.evidence-name {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
}

.evidence-list {
  display: grid;
  gap: 8px;
}

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

.evidence-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  background-color: var(--c-line-strong);
  border-radius: 50%;
}

.evidence-basis {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  color: var(--c-ink-faint);
}

.hierarchy-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: var(--gap-lg);
  align-items: start;
}

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

.hierarchy-subtitle {
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
  padding-bottom: 10px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--c-ink);
}

.hierarchy-subtitle + .hierarchy-list {
  margin-bottom: 24px;
}

.hierarchy-list {
  display: grid;
  gap: 10px;
}

.hierarchy-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.hierarchy-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--c-accent);
  border-radius: 50%;
}

.hierarchy-list strong {
  color: var(--c-ink);
}

/* ---------- 404 页 ---------- */

.error-main {
  max-width: var(--w-narrow);
  margin: 0 auto;
  padding: 72px 24px 80px;
}

.error-panel {
  padding-bottom: 36px;
  border-bottom: 1px solid var(--c-line);
}

.error-code {
  font-size: 60px;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1;
  font-variant-numeric: tabular-nums;
}

.error-panel h1 {
  margin-top: 16px;
  font-size: 30px;
  font-weight: 700;
  color: var(--c-ink);
}

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

.error-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.error-hints {
  padding-top: 32px;
}

.error-hints h2 {
  font-size: 18px;
  font-weight: 700;
  color: var(--c-ink);
  margin-bottom: 14px;
}

.hint-list {
  display: grid;
  gap: 10px;
}

.hint-list li {
  min-width: 0;
}

.hint-list a {
  display: block;
  padding: 12px 16px;
  font-size: 14px;
  color: var(--c-ink-soft);
  background-color: var(--c-surface);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  min-height: 44px;
}

.hint-list a:hover {
  color: var(--c-accent);
  border-color: var(--c-line-strong);
}

/* --------------------------------------------------------------------------
   responsive — 断点
   -------------------------------------------------------------------------- */

@media (max-width: 1080px) {
  .hero-title {
    font-size: 38px;
  }

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

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

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

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

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

@media (max-width: 900px) {
  .header-inner {
    padding: 14px 20px;
  }

  .nav-toggle {
    display: block;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    margin-top: 12px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-list li {
    border-bottom: 1px solid var(--c-line);
  }

  .nav-link {
    display: flex;
    align-items: center;
    min-height: 48px;
    padding: 12px 4px;
    border-bottom: 0;
  }

  .nav-link.is-current {
    border-bottom: 0;
    color: var(--c-accent);
  }

  .home-main,
  .inner-main {
    padding: 0 20px 56px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-lg);
  }

  .hero-media {
    order: 2;
  }

  .hero-title {
    font-size: 32px;
    max-width: none;
  }

  .two-col,
  .direction-layout,
  .fields-overview-body,
  .hierarchy-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: var(--gap-md);
  }

  .col-side {
    padding-left: 0;
    padding-top: var(--gap-md);
    border-left: 0;
    border-top: 1px solid var(--c-line);
  }

  .direction-entries {
    grid-template-columns: minmax(140px, 180px) minmax(0, 1fr);
  }

  .field-position-list,
  .section-boundaries .boundary-list,
  .legend-columns {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 620px) {
  body {
    font-size: 15px;
  }

  .brand {
    font-size: 19px;
  }

  .brand-sub {
    display: none;
  }

  .page-header {
    padding: 14px 0 22px;
    margin-bottom: 28px;
  }

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

  .section-title {
    font-size: 20px;
  }

  .section {
    margin-bottom: 40px;
  }

  .hero-section {
    padding: 28px 0 40px;
    margin-bottom: 40px;
  }

  .hero-title {
    font-size: 27px;
  }

  .genre-grid,
  .index-grid,
  .summary-columns,
  .related-links,
  .evidence-grid,
  .intro-points {
    grid-template-columns: minmax(0, 1fr);
  }

  .genre-feature {
    min-height: 0;
  }

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

  .entry-cover {
    max-width: 220px;
  }

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

  .updates-list .change-row {
    grid-template-columns: minmax(0, 1fr);
  }

  .change-type,
  .updates-list .change-type {
    text-align: left;
    color: var(--c-accent);
  }

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

  .field-row-head {
    display: none;
  }

  .field-sample {
    color: var(--c-ink-soft);
  }

  .field-mini-list,
  .field-table-mini,
  .legend-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .field-mini-list dt,
  .field-table-mini dt,
  .legend-term {
    padding-bottom: 2px;
    border-top: 1px solid var(--c-line);
  }

  .field-mini-list dd,
  .field-table-mini dd,
  .legend-desc {
    padding-top: 0;
    padding-bottom: 10px;
    border-top: 0;
  }

  .step-row,
  .guide-steps .step-item,
  .order-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .guide-steps .step-item .step-no {
    font-size: 20px;
  }

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

  .error-main {
    padding: 48px 20px 60px;
  }

  .error-code {
    font-size: 48px;
  }

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

  .error-actions .btn {
    flex: 1 1 auto;
    text-align: center;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 34px 20px 24px;
  }

  .footer-copy {
    padding: 16px 20px;
  }
}