:root {
  --color-bg: #ffffff;
  --color-surface: #f6f7f9;
  --color-ink: #14181f;
  --color-muted: #5b6472;
  --color-action: #e5484d;
  --color-action-dark: #c93b40;
  --color-line: #e6e8ec;
  --color-footer-bg: #14181f;
  --color-footer-ink: #eef0f3;
  --color-footer-muted: #9aa3b0;
  --radius-card: 8px;
  --radius-pill: 6px;
  --container: 1120px;
  --gutter: 16px;
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --shadow-soft: 0 1px 2px rgba(20, 24, 31, 0.06);
}

/* ============================================================
   base
   ============================================================ */

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

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

.site-body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-stack);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
}

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

.site-body p {
  margin: 0;
}

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

.site-body dl,
.site-body dd {
  margin: 0;
}

.site-body a {
  color: var(--color-action);
  text-decoration: none;
}

.site-body a:hover,
.site-body a:focus-visible {
  color: var(--color-action-dark);
  text-decoration: underline;
}

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

.site-body figure {
  margin: 0;
}

.site-body button {
  font-family: inherit;
}

.site-body :focus-visible {
  outline: 2px solid var(--color-action);
  outline-offset: 2px;
}

/* ============================================================
   layout — 全站骨架
   ============================================================ */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 12px var(--gutter);
}

.site-nav {
  display: flex;
  align-items: center;
}

.site-main {
  display: block;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.inner-main {
  padding-top: 20px;
  padding-bottom: 56px;
}

.site-footer {
  margin-top: 48px;
  background-color: var(--color-footer-bg);
  color: var(--color-footer-ink);
}

/* 首页顶部事实条 */

.site-factbar {
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.site-factbar p {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px var(--gutter);
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.6;
}

/* ============================================================
   components — 页头与导航
   ============================================================ */

.brand {
  flex: 0 0 auto;
  color: var(--color-ink);
  font-size: 20px;
  font-weight: 600;
  letter-spacing: 0;
}

.brand:hover,
.brand:focus-visible {
  color: var(--color-action);
  text-decoration: none;
}

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  border-radius: var(--radius-pill);
  color: var(--color-muted);
  font-size: 15px;
  font-weight: 500;
  white-space: nowrap;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-ink);
  background-color: var(--color-surface);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--color-action);
  font-weight: 600;
}

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

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 1px;
}

/* ============================================================
   components — 面包屑与页面标题区
   ============================================================ */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 16px;
  color: var(--color-muted);
  font-size: 14px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--color-action);
}

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

.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 500;
}

.page-header {
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--color-line);
}

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

.page-description {
  max-width: 760px;
  margin-top: 12px;
  color: var(--color-muted);
  font-size: 16px;
}

.page-meta {
  margin-top: 10px;
  color: var(--color-muted);
  font-size: 14px;
}

/* ============================================================
   components — 通用区块标题与列表
   ============================================================ */

.section-head {
  margin-bottom: 24px;
}

.section-title {
  font-size: 26px;
  font-weight: 600;
}

.section-desc {
  max-width: 760px;
  margin-top: 10px;
  color: var(--color-muted);
  font-size: 15px;
}

.section-intro {
  max-width: 760px;
  margin-bottom: 24px;
  color: var(--color-muted);
  font-size: 15px;
}

.section-foot {
  margin-top: 24px;
  color: var(--color-muted);
  font-size: 14px;
}

.section-foot a {
  margin-right: 16px;
}

.col-more {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 12px;
  font-size: 15px;
  font-weight: 500;
}

/* ============================================================
   pages — 首页
   ============================================================ */

.home-main {
  padding-bottom: 48px;
}

.hero-section {
  padding: 40px 0 48px;
}

.hero-layout {
  display: grid;
  grid-template-columns: minmax(320px, 1fr) minmax(0, 1.15fr);
  gap: 40px;
  align-items: start;
}

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

.hero-title {
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
}

.hero-lead {
  margin-top: 16px;
  max-width: 520px;
  color: var(--color-muted);
  font-size: 16px;
}

.hero-paths {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.hero-path {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 150px;
  padding: 12px 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.path-link {
  color: var(--color-action);
  font-size: 15px;
  font-weight: 600;
}

.path-note {
  color: var(--color-muted);
  font-size: 13px;
}

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

.hero-visual {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
}

.hero-visual img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.hero-visual figcaption {
  padding: 10px 14px;
  color: var(--color-muted);
  font-size: 13px;
  border-top: 1px solid var(--color-line);
}

.cover-wall {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.cover-card {
  min-width: 0;
  background-color: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.cover-card:hover {
  border-color: var(--color-muted);
  box-shadow: var(--shadow-soft);
}

.cover-link {
  display: block;
  padding: 10px;
  color: var(--color-ink);
}

.cover-link:hover,
.cover-link:focus-visible {
  color: var(--color-ink);
  text-decoration: none;
}

.cover-img {
  width: 100%;
  height: 132px;
  object-fit: cover;
  border-radius: 6px;
  background-color: var(--color-surface);
  transition: transform 0.2s ease;
}

.cover-card:hover .cover-img {
  transform: scale(1.03);
}

.cover-name {
  display: block;
  margin-top: 8px;
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.cover-genre {
  display: block;
  margin-top: 2px;
  color: var(--color-muted);
  font-size: 13px;
}

.cover-status {
  display: block;
  margin-top: 2px;
  color: var(--color-action);
  font-size: 13px;
}

/* 题材方向总览 */

.genre-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

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

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

.genre-name {
  font-size: 17px;
  font-weight: 600;
}

.genre-trait {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 14px;
}

.genre-picks {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 14px;
}

.pick-link {
  font-size: 14px;
}

.genre-entry {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: auto;
  padding-top: 12px;
  font-size: 14px;
  font-weight: 600;
}

/* 更新与榜单并列区 */

.board-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

.board-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr);
  gap: 32px;
}

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

.board-col-title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
  font-size: 17px;
  font-weight: 600;
}

.update-list {
  margin-top: 4px;
}

.update-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) 84px 90px 72px;
  gap: 10px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
}

.update-date {
  color: var(--color-muted);
  white-space: nowrap;
}

.update-name {
  color: var(--color-ink);
  font-weight: 500;
}

.update-genre {
  color: var(--color-muted);
}

.update-range {
  color: var(--color-muted);
}

.update-status {
  color: var(--color-action);
  text-align: right;
}

.rank-list {
  margin-top: 4px;
}

.rank-row {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr) 84px;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
}

.rank-no {
  color: var(--color-action);
  font-weight: 600;
}

.rank-name {
  font-size: 15px;
  font-weight: 500;
}

.rank-genre {
  color: var(--color-muted);
  text-align: right;
}

.rank-note {
  grid-column: 2 / -1;
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 13px;
}

/* 阅读说明与收录边界摘要 */

.guide-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

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

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

.guide-col-title {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
  font-size: 17px;
  font-weight: 600;
}

.field-list {
  margin-top: 12px;
}

.field-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
}

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

.field-desc {
  color: var(--color-muted);
}

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

.boundary-box {
  min-width: 0;
  padding: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.boundary-title {
  font-size: 15px;
  font-weight: 600;
}

.boundary-list {
  margin-top: 10px;
}

.boundary-list li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 8px;
  color: var(--color-muted);
  font-size: 14px;
}

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

/* 站内栏目索引 */

.index-section {
  padding: 40px 0;
  border-top: 1px solid var(--color-line);
}

.index-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

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

.index-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
}

.index-note {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 13px;
}

/* ============================================================
   pages — 题材分类
   ============================================================ */

.genre-overview {
  margin-bottom: 48px;
}

.genre-groups {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.genre-group {
  min-width: 0;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.genre-group-head {
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.genre-group-name {
  font-size: 20px;
  font-weight: 600;
}

.genre-group-note {
  margin-top: 6px;
  color: var(--color-muted);
  font-size: 14px;
}

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

.genre-group-covers .cover-card {
  background-color: var(--color-bg);
}

.genre-group-covers .cover-card img {
  width: 100%;
  height: 168px;
  object-fit: cover;
  border-radius: 6px;
  background-color: var(--color-surface);
}

.cover-card-body {
  padding: 10px 12px 12px;
}

.cover-card-name {
  font-size: 15px;
  font-weight: 600;
}

.cover-card-meta {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 13px;
}

.genre-group-foot {
  margin-top: 14px;
  font-size: 14px;
}

.field-compare {
  margin-bottom: 48px;
}

.table-wrap {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.field-table {
  width: 100%;
  min-width: 640px;
  border-collapse: collapse;
  font-size: 14px;
}

.table-caption {
  padding: 12px 16px;
  color: var(--color-muted);
  font-size: 13px;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
}

.field-table th,
.field-table td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--color-line);
}

.field-table thead th {
  background-color: var(--color-surface);
  color: var(--color-ink);
  font-weight: 600;
  white-space: nowrap;
}

.field-table tbody th {
  color: var(--color-ink);
  font-weight: 600;
}

.field-table tbody td {
  color: var(--color-muted);
}

.field-table tbody tr:last-child th,
.field-table tbody tr:last-child td {
  border-bottom: none;
}

.genre-advice {
  margin-bottom: 8px;
}

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

.advice-item {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.advice-title {
  font-size: 17px;
  font-weight: 600;
}

.advice-item p {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 14px;
}

.related-links {
  margin-top: 32px;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.related-links-title {
  font-size: 17px;
  font-weight: 600;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.related-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 500;
}

/* ============================================================
   pages — 最近更新
   ============================================================ */

.updates-list-section {
  margin-bottom: 48px;
}

.updates-list {
  border-top: 1px solid var(--color-line);
}

.updates-list .update-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
}

.update-thumb {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
}

.update-thumb img {
  width: 100%;
  height: 64px;
  object-fit: cover;
}

.update-info {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 14px;
  min-width: 0;
  font-size: 14px;
}

.updates-list .update-date {
  color: var(--color-muted);
  font-variant-numeric: tabular-nums;
}

.updates-list .update-name {
  font-size: 16px;
  font-weight: 600;
}

.updates-list .update-genre {
  color: var(--color-muted);
}

.updates-list .update-chapters {
  color: var(--color-muted);
}

.updates-list .update-status {
  color: var(--color-action);
  text-align: left;
}

.updates-fields-section {
  margin-bottom: 48px;
}

.updates-fields-section .field-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0 32px;
  margin-top: 0;
}

.updates-fields-section .field-item {
  display: block;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line);
}

.updates-fields-section .field-name {
  font-size: 15px;
}

.updates-fields-section .field-desc {
  margin-top: 4px;
}

.field-note {
  margin-top: 16px;
  color: var(--color-muted);
  font-size: 14px;
}

.updates-genre-entry {
  margin-bottom: 8px;
}

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

.genre-entry-item {
  min-width: 0;
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.genre-entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 16px;
  font-weight: 600;
}

.genre-entry-desc {
  margin-top: 6px;
  color: var(--color-muted);
  font-size: 14px;
}

.updates-cross-links {
  margin-top: 24px;
  color: var(--color-muted);
  font-size: 14px;
}

.updates-cross-links a {
  margin-right: 16px;
}

/* ============================================================
   pages — 人气榜单
   ============================================================ */

.rank-controls {
  margin-bottom: 40px;
}

.section-inner {
  min-width: 0;
}

.control-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  margin-top: 16px;
  padding: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.control-label {
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 500;
}

.control-select {
  min-height: 44px;
  padding: 0 12px;
  color: var(--color-ink);
  font-family: inherit;
  font-size: 15px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  cursor: pointer;
}

.control-note {
  margin-top: 12px;
  color: var(--color-muted);
  font-size: 14px;
}

.rank-list-section {
  margin-bottom: 48px;
}

.rank-list {
  border-top: 1px solid var(--color-line);
}

.rank-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--color-line);
}

.rank-thumb {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
}

.rank-thumb img {
  width: 100%;
  height: 84px;
  object-fit: cover;
}

.rank-cover {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
}

.rank-cover img {
  width: 100%;
  height: 108px;
  object-fit: cover;
}

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

.rank-position {
  display: inline-block;
  min-width: 32px;
  color: var(--color-action);
  font-size: 15px;
  font-weight: 600;
}

.rank-item-top .rank-position {
  font-size: 17px;
}

.rank-name {
  display: inline;
  font-size: 16px;
  font-weight: 600;
}

.rank-genre {
  margin-top: 4px;
  color: var(--color-muted);
  font-size: 14px;
}

.rank-reason {
  margin-top: 6px;
  max-width: 640px;
  color: var(--color-muted);
  font-size: 14px;
}

.rank-scope {
  margin-bottom: 8px;
}

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

.scope-col {
  min-width: 0;
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.scope-title {
  font-size: 17px;
  font-weight: 600;
}

.scope-col p {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 14px;
}

.scope-foot {
  margin-top: 24px;
  color: var(--color-muted);
  font-size: 14px;
}

.scope-foot a {
  margin-right: 16px;
}

/* ============================================================
   pages — 阅读说明
   ============================================================ */

.guide-figure {
  overflow: hidden;
  margin-bottom: 40px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  background-color: var(--color-surface);
}

.guide-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.guide-figure figcaption {
  padding: 10px 16px;
  color: var(--color-muted);
  font-size: 13px;
  border-top: 1px solid var(--color-line);
}

.guide-section h2 {
  font-size: 26px;
  font-weight: 600;
}

.glossary-list {
  border-top: 1px solid var(--color-line);
}

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

.glossary-summary {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 10px 0;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.glossary-summary::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  color: var(--color-action);
  font-size: 18px;
  font-weight: 500;
}

.glossary-item[open] .glossary-summary::after {
  content: "–";
}

.glossary-body {
  padding: 0 0 16px;
}

.glossary-meaning {
  color: var(--color-muted);
  font-size: 15px;
}

.glossary-example {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 14px;
}

.boundary-section {
  margin-top: 0;
}

.boundary-compare {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.boundary-col {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.boundary-include {
  background-color: var(--color-surface);
}

.boundary-exclude {
  background-color: var(--color-bg);
}

.boundary-col h3 {
  font-size: 17px;
  font-weight: 600;
}

.browse-section {
  margin-bottom: 8px;
}

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

.browse-step {
  min-width: 0;
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.browse-step h3 {
  font-size: 17px;
  font-weight: 600;
}

.browse-step p {
  margin-top: 8px;
  color: var(--color-muted);
  font-size: 14px;
}

.related-nav {
  margin-top: 32px;
  padding: 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.related-nav-title {
  font-size: 17px;
  font-weight: 600;
}

.related-nav-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 12px;
}

.related-nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 500;
}

/* ============================================================
   pages — 404
   ============================================================ */

.error-main {
  padding-top: 56px;
  padding-bottom: 72px;
}

.error-panel {
  max-width: 640px;
  margin: 0 auto;
  padding: 32px;
  text-align: center;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
}

.error-code {
  color: var(--color-action);
  font-size: 40px;
  font-weight: 600;
  line-height: 1.1;
}

.error-title {
  margin-top: 8px;
  font-size: 26px;
  font-weight: 600;
}

.error-text {
  margin-top: 12px;
  color: var(--color-muted);
  font-size: 15px;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.error-links a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 12px;
  background-color: var(--color-bg);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
}

.error-note {
  margin-top: 20px;
  color: var(--color-muted);
  font-size: 14px;
}

/* ============================================================
   components — 页脚
   ============================================================ */

.footer-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) repeat(3, minmax(0, 1fr));
  gap: 32px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px var(--gutter) 32px;
}

.footer-brand {
  min-width: 0;
}

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

.footer-desc {
  margin-top: 10px;
  max-width: 340px;
  color: var(--color-footer-muted);
  font-size: 14px;
}

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

.footer-col-title {
  color: var(--color-footer-ink);
  font-size: 15px;
  font-weight: 600;
}

.footer-list {
  margin-top: 10px;
}

.footer-list li {
  margin-bottom: 2px;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--color-footer-muted);
  font-size: 14px;
}

.footer-list a:hover,
.footer-list a:focus-visible {
  color: var(--color-footer-ink);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.12);
}

.footer-copy {
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px var(--gutter) 24px;
  color: var(--color-footer-muted);
  font-size: 13px;
}

/* ============================================================
   responsive
   ============================================================ */

@media (max-width: 1024px) {
  .hero-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

  .board-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

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

  .advice-list,
  .scope-grid,
  .browse-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

@media (max-width: 768px) {
  .site-header {
    position: static;
  }

  .header-inner {
    flex-wrap: wrap;
    padding: 10px var(--gutter);
  }

  .nav-toggle {
    display: flex;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 8px 0 4px;
    border-top: 1px solid var(--color-line);
  }

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

  .nav-link {
    justify-content: flex-start;
    width: 100%;
    min-height: 48px;
    padding: 0 8px;
    border-radius: 0;
  }

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

  .section-title,
  .guide-section h2 {
    font-size: 20px;
  }

  .guide-columns,
  .boundary-grid,
  .boundary-compare {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .guide-figure img {
    height: 180px;
  }

  .hero-visual img {
    height: 180px;
  }

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

  .cover-img {
    height: 118px;
  }

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

  .genre-group-covers .cover-card img {
    height: 150px;
  }

  .updates-fields-section .field-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .updates-list .update-row {
    grid-template-columns: 72px minmax(0, 1fr);
    gap: 12px;
  }

  .rank-item {
    grid-template-columns: 64px minmax(0, 1fr);
    gap: 12px;
  }

  .rank-thumb img {
    height: 76px;
  }

  .rank-cover img {
    height: 96px;
  }
}

@media (max-width: 560px) {
  .site-main {
    padding-left: var(--gutter);
    padding-right: var(--gutter);
  }

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

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

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

  .genre-grid,
  .index-grid,
  .advice-list,
  .scope-grid,
  .browse-steps,
  .genre-entry-list,
  .related-list,
  .related-nav-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .update-row {
    grid-template-columns: 72px minmax(0, 1fr);
    row-gap: 2px;
  }

  .update-range,
  .update-status {
    text-align: left;
  }

  .rank-row {
    grid-template-columns: 28px minmax(0, 1fr);
  }

  .rank-genre {
    text-align: left;
  }

  .rank-note {
    grid-column: 2 / -1;
  }

  .field-item {
    grid-template-columns: 88px minmax(0, 1fr);
    gap: 8px;
  }

  .error-panel {
    padding: 24px 18px;
  }

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