/* ============================================================
   base — 全站基础变量、重置、排版与通用元素
   ============================================================ */
:root {
  --color-primary: #2B3A4A;
  --color-accent: #C8A461;
  --color-bg: #F7F5F0;
  --color-text: #3B3A36;
  --color-point: #A0522D;
  --color-line: rgba(43, 58, 74, 0.12);
  --color-card: #FFFFFF;
  --color-footer-bg: #F0ECE4;
  --font-mono: "SFMono-Regular", "Cascadia Mono", "Roboto Mono", Consolas, "Liberation Mono", Menlo, monospace;
  --container-width: 1140px;
  --radius: 8px;
  --space-section: 56px;
  --space-block: 32px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-primary);
  line-height: 1.4;
  font-weight: 700;
}

/* 等宽数字特性：用于编号、日期等 */
.work-id,
.rank-name,
.taxonomy-code,
.term-no,
.restriction-index,
.update-date,
.breadcrumb,
.error-code {
  font-family: var(--font-mono);
  font-feature-settings: "tnum" 1;
}

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

/* ============================================================
   layout — 全站骨架布局：页头、页脚、主容器、面包屑
   ============================================================ */
.site-header {
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.brand-name::before {
  content: "◆";
  color: var(--color-accent);
  margin-right: 8px;
  font-size: 16px;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle-icon {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  position: relative;
  transition: background 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 22px;
  height: 2px;
  background: var(--color-primary);
  transition: transform 0.2s ease;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::before {
  transform: rotate(45deg);
  top: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-icon::after {
  transform: rotate(-45deg);
  top: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nav-list li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-primary);
  border-bottom: 2px solid transparent;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  border-bottom-color: var(--color-accent);
  color: var(--color-point);
}

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

.sitemap-link {
  flex-shrink: 0;
  font-size: 15px;
  color: var(--color-primary);
  padding: 8px 10px;
  position: relative;
}

.sitemap-link::before {
  content: "☰";
  margin-right: 6px;
  font-size: 14px;
}

.sitemap-link:hover {
  color: var(--color-point);
}

.site-main {
  min-height: 60vh;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.breadcrumb {
  font-size: 13px;
  color: var(--color-text);
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

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

.breadcrumb-sep {
  color: var(--color-accent);
  margin: 0 2px;
}

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

.page-header {
  margin-bottom: 40px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text);
  max-width: 720px;
}

.site-footer {
  background-color: var(--color-footer-bg);
  border-top: 1px solid var(--color-line);
  margin-top: 0;
}

.footer-grid {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--color-primary);
}

.footer-col ul li {
  margin-bottom: 8px;
}

.footer-col ul li a {
  font-size: 14px;
  color: var(--color-text);
}

.footer-col ul li a:hover {
  color: var(--color-point);
}

.footer-brand {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 10px;
}

.footer-desc p {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.footer-legal p {
  font-size: 13px;
  color: var(--color-text);
  line-height: 1.6;
}

.copyright {
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-text);
  border-top: 1px solid var(--color-line);
  padding-top: 16px;
  grid-column: 1 / -1;
  text-align: center;
}

/* ============================================================
   components — 通用组件样式
   ============================================================ */
/* 通用 section 标题 */
.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 24px;
}

.section-head h2 {
  font-size: 22px;
  font-weight: 700;
}

.section-note {
  font-size: 13px;
  color: var(--color-text);
  font-weight: 400;
  margin-left: 12px;
}

/* 通用 section lead */
.section-lead {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 24px;
  max-width: 720px;
}

/* 通用 figure 与图片 */
figure {
  margin: 0;
}

figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

figcaption {
  font-size: 13px;
  color: var(--color-text);
  padding: 8px 0 0;
  line-height: 1.5;
  text-align: center;
}

/* 通用链接组 */
.related-links {
  margin-top: 48px;
  padding-top: 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.related-links-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  margin-right: 8px;
}

.related-links-item {
  font-size: 14px;
  color: var(--color-primary);
  padding: 4px 12px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  transition: border-color 0.2s ease, background 0.2s ease;
}

.related-links-item:hover {
  border-color: var(--color-accent);
  background: rgba(200, 164, 97, 0.08);
}

/* 表格通用 */
.table-wrap {
  overflow-x: auto;
  margin-bottom: 24px;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

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

th {
  background: rgba(43, 58, 74, 0.04);
  font-weight: 600;
  color: var(--color-primary);
}

tr:hover td {
  background: rgba(200, 164, 97, 0.04);
}

/* ============================================================
   pages — 首页 index.html 专属模块
   ============================================================ */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 40px 24px 64px;
}

/* 首屏双栏 */
.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-bottom: 56px;
}

.hero-copy h1 {
  font-size: 28px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 12px;
}

.hero-lead {
  font-size: 16px;
  color: var(--color-text);
  line-height: 1.8;
  max-width: 480px;
}

.hero-panels {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

/* 更新动态面板 */
.update-panel {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.update-panel h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

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

.update-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  flex-wrap: wrap;
  font-size: 14px;
}

.update-date {
  font-size: 12px;
  color: var(--color-point);
  flex-shrink: 0;
  margin-top: 2px;
}

.status-tag {
  font-size: 12px;
  color: var(--color-point);
  border: 1px solid rgba(160, 82, 45, 0.3);
  border-radius: 3px;
  padding: 0 6px;
  flex-shrink: 0;
  line-height: 1.6;
}

.update-desc {
  flex: 1;
  min-width: 120px;
}

.update-link {
  font-size: 13px;
  color: var(--color-accent);
  flex-shrink: 0;
}

.update-link:hover {
  color: var(--color-point);
}

/* 热门题材面板 */
.topic-panel {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.topic-panel h2 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.tag-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.tag-item {
  display: inline-block;
  padding: 6px 14px;
  font-size: 14px;
  color: var(--color-primary);
  border: 1px solid var(--color-accent);
  border-radius: 4px;
  transition: background 0.2s ease, color 0.2s ease;
}

.tag-item:hover {
  background: var(--color-accent);
  color: #fff;
}

.help-entry {
  display: inline-flex;
  align-items: center;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  padding: 8px 0;
}

.help-entry .arrow {
  margin-left: 8px;
  transition: transform 0.2s ease;
}

.help-entry:hover .arrow {
  transform: translateX(4px);
}

/* 首屏配图 */
.content-media-primary {
  grid-column: 1 / -1;
  margin-top: 24px;
}

.content-media-primary img {
  border-radius: var(--radius);
  max-height: 320px;
  object-fit: cover;
  width: 100%;
}

/* 作品索引区 */
.index-section {
  margin-bottom: 56px;
}

.filter-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 20px;
}

.filter-chip {
  display: inline-block;
  padding: 6px 16px;
  font-size: 14px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  color: var(--color-primary);
  transition: border-color 0.2s ease, background 0.2s ease;
}

.filter-chip:hover {
  border-color: var(--color-accent);
  background: rgba(200, 164, 97, 0.08);
}

.result-count {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 20px;
}

.result-count strong {
  color: var(--color-point);
  font-weight: 600;
}

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

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

.work-item:hover {
  box-shadow: 0 4px 16px rgba(43, 58, 74, 0.08);
  transform: translateY(-2px);
}

.work-thumb {
  margin: 0;
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.thumb-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.work-item:hover .thumb-img {
  transform: scale(1.03);
}

.work-meta {
  padding: 16px;
}

.work-id {
  display: block;
  font-size: 12px;
  color: var(--color-accent);
  margin-bottom: 6px;
}

.work-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.work-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--color-point);
  border: 1px solid rgba(160, 82, 45, 0.3);
  border-radius: 3px;
  padding: 2px 8px;
}

.index-more {
  text-align: center;
  font-size: 14px;
}

.index-more a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

.index-more a:hover {
  color: var(--color-point);
  border-bottom-color: var(--color-point);
}

/* 榜单区 */
.rank-section {
  margin-bottom: 56px;
}

.rank-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

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

.rank-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.rank-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rank-list li {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--color-line);
}

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

.rank-name {
  color: var(--color-primary);
}

.rank-status {
  font-size: 12px;
  color: var(--color-text);
  flex-shrink: 0;
}

.rank-footnote {
  font-size: 13px;
  color: var(--color-text);
  margin-top: 16px;
  text-align: right;
}

/* 重要说明条 */
.notice-bar {
  background: var(--color-card);
  border: 1px solid var(--color-accent);
  border-left: 4px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 48px;
}

.notice-text {
  font-size: 14px;
  line-height: 1.7;
}

.notice-text strong {
  color: var(--color-point);
}

.notice-text a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
}

.notice-text a:hover {
  color: var(--color-point);
}

/* ============================================================
   pages — 漫画全库 nsmh/catalog.html
   ============================================================ */
.taxonomy-section {
  margin-bottom: 48px;
}

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

.taxonomy-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.taxonomy-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 12px rgba(43, 58, 74, 0.06);
}

.taxonomy-card-head {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 12px;
}

.taxonomy-code {
  font-size: 13px;
  color: var(--color-accent);
}

.taxonomy-card h3 {
  font-size: 18px;
  font-weight: 700;
}

.taxonomy-range {
  font-size: 13px;
  color: var(--color-point);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}

.taxonomy-card p:last-child {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

/* 编号规则区 */
.index-rule-section {
  margin-bottom: 48px;
}

.rule-layout {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 40px;
  align-items: start;
}

.rule-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin: 20px 0 12px;
}

.rule-content h3:first-child {
  margin-top: 0;
}

.rule-content p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.rule-content strong {
  color: var(--color-point);
  font-family: var(--font-mono);
  font-weight: 600;
}

.rule-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.rule-figure img {
  max-height: 260px;
  object-fit: cover;
}

.rule-figure figcaption {
  padding: 12px 16px;
  text-align: left;
  background: var(--color-card);
}

/* 日期分组示例 */
.date-group-section {
  margin-bottom: 48px;
}

.date-group-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.date-group-item {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.date-group-item h3 {
  font-size: 15px;
  font-weight: 700;
  color: var(--color-point);
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--color-line);
}

.date-group-item ul {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px 16px;
}

.date-group-item ul li {
  font-size: 14px;
  color: var(--color-text);
  padding: 6px 0;
  border-bottom: 1px solid rgba(43, 58, 74, 0.04);
}

.group-note {
  font-size: 13px;
  color: var(--color-text);
  margin-top: 16px;
}

/* ============================================================
   pages — 选漫指南 nsmh/guide.html
   ============================================================ */
.intro-paragraph {
  margin-bottom: 40px;
}

.intro-paragraph h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.intro-paragraph p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
  max-width: 760px;
}

.four-questions {
  margin-bottom: 48px;
}

.four-questions h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

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

.question-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.question-card h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 12px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.question-card p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 12px;
}

.question-card ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.question-card ul li {
  font-size: 13px;
  color: var(--color-text);
  padding-left: 16px;
  position: relative;
}

.question-card ul li::before {
  content: "·";
  position: absolute;
  left: 4px;
  color: var(--color-accent);
  font-weight: 700;
}

/* 对应表 */
.match-table {
  margin-bottom: 48px;
}

.match-table h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.match-table > p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 20px;
}

/* 配图 */
.image-block {
  margin-bottom: 48px;
}

.image-block figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.image-block img {
  max-height: 320px;
  object-fit: cover;
}

.image-block figcaption {
  padding: 12px;
  background: var(--color-card);
}

/* 路径说明 */
.path-note {
  margin-bottom: 48px;
}

.path-note h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.path-note p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
  max-width: 760px;
}

.path-note a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
}

.path-note a:hover {
  color: var(--color-point);
}

/* ============================================================
   pages — 题材场景 nsmh/scene.html
   ============================================================ */
.scene-cards {
  margin-bottom: 48px;
}

.scene-cards h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 24px;
}

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

.scene-card {
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
}

.scene-card h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 12px;
}

.scene-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-bottom: 12px;
}

.scene-tags .tag {
  font-size: 12px;
  color: var(--color-point);
  border: 1px solid rgba(160, 82, 45, 0.3);
  border-radius: 3px;
  padding: 2px 8px;
}

.scene-card > p:last-child {
  font-size: 14px;
  color: var(--color-text);
  line-height: 1.7;
}

.scene-figure {
  margin: 48px 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.scene-figure img {
  max-height: 300px;
  object-fit: cover;
}

.scene-figure figcaption {
  padding: 12px;
  background: var(--color-card);
}

/* 热力说明 */
.heat-note {
  margin-bottom: 48px;
}

.heat-note h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.heat-note > p {
  font-size: 14px;
  color: var(--color-text);
  margin-bottom: 20px;
}

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

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

.heat-item h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--color-point);
}

.heat-item p {
  font-size: 14px;
  line-height: 1.7;
}

.heat-note > p:last-child a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
  margin-right: 16px;
}

.heat-note > p:last-child a:hover {
  color: var(--color-point);
}

/* ============================================================
   pages — 漫画词典 nsmh/glossary.html
   ============================================================ */
.term-section {
  margin-bottom: 48px;
}

.term-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

.term-group {
  margin-bottom: 36px;
}

.term-group h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

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

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

.term-no {
  display: inline-block;
  font-size: 12px;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.term-card h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

.term-card p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.term-example {
  font-size: 13px;
  color: var(--color-text);
  border-left: 3px solid var(--color-accent);
  padding-left: 12px;
  font-style: italic;
}

/* 使用场景 */
.usage-section {
  margin-bottom: 48px;
}

.usage-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

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

.usage-item h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 8px;
}

.usage-item p {
  font-size: 14px;
  line-height: 1.7;
}

.glossary-figure {
  margin: 48px 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.glossary-figure img {
  max-height: 300px;
  object-fit: cover;
}

.glossary-figure figcaption {
  padding: 12px;
  background: var(--color-card);
}

/* 相关栏目（glossary 内嵌 section） */
.related-links p a {
  font-size: 14px;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
  margin-right: 16px;
}

.related-links p a:hover {
  color: var(--color-point);
}

/* ============================================================
   pages — 阅读帮助 nsmh/help.html
   ============================================================ */
.restrictions-block {
  margin-bottom: 48px;
}

.restrictions-block h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}

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

.restriction-list li {
  display: flex;
  gap: 16px;
  background: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.restriction-index {
  font-size: 14px;
  color: var(--color-accent);
  flex-shrink: 0;
  font-weight: 600;
}

.restriction-content h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 6px;
}

.restriction-content p {
  font-size: 14px;
  line-height: 1.7;
}

.restriction-more {
  margin-top: 16px;
  font-size: 14px;
}

.restriction-more a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
}

.restriction-more a:hover {
  color: var(--color-point);
}

/* FAQ 手风琴 */
.faq-block {
  margin-bottom: 48px;
}

.faq-block h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}

.faq-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

.faq-item summary {
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  cursor: pointer;
  list-style: none;
  position: relative;
  padding-right: 40px;
  transition: background 0.2s ease;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--color-accent);
  transition: transform 0.2s ease;
}

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

.faq-item[open] summary {
  background: rgba(200, 164, 97, 0.06);
}

.faq-answer {
  padding: 0 20px 16px;
  border-top: 1px solid var(--color-line);
}

.faq-answer p {
  font-size: 14px;
  line-height: 1.8;
  padding-top: 12px;
}

/* 导航示意 */
.nav-map {
  margin-bottom: 48px;
}

.nav-map h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 20px;
}

.navmap-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.navmap-text p {
  font-size: 14px;
  line-height: 1.8;
  margin-bottom: 12px;
}

.navmap-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.navmap-figure img {
  max-height: 260px;
  object-fit: cover;
}

.navmap-figure figcaption {
  padding: 12px;
  background: var(--color-card);
}

/* ============================================================
   pages — 关于本站 nsmh/about.html
   ============================================================ */
.about-section {
  margin-bottom: 48px;
}

.about-section h2 {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 16px;
}

.about-section p {
  font-size: 15px;
  line-height: 1.8;
  margin-bottom: 12px;
  max-width: 760px;
}

.boundary-items {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.boundary-items li {
  font-size: 14px;
  line-height: 1.7;
  padding-left: 28px;
  position: relative;
}

.boundary-items li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--color-accent);
  font-weight: 700;
}

.feedback-note p a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-accent);
}

.feedback-note p a:hover {
  color: var(--color-point);
}

.about-figure {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 48px;
}

.about-figure img {
  max-height: 300px;
  object-fit: cover;
}

.about-figure figcaption {
  padding: 12px;
  background: var(--color-card);
}

/* ============================================================
   pages — 404.html
   ============================================================ */
.error-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 80px 24px;
  min-height: 60vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-content {
  text-align: center;
  max-width: 480px;
}

.error-code {
  font-size: 64px;
  font-weight: 800;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-content h1 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: var(--color-text);
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-bottom: 16px;
}

.btn-primary {
  display: inline-block;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: var(--color-primary);
  border-radius: 4px;
  transition: background 0.2s ease;
}

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

.btn-secondary {
  display: inline-block;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: 4px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.btn-secondary:hover {
  border-color: var(--color-point);
  color: var(--color-point);
}

.error-tip {
  font-size: 13px;
  color: var(--color-text);
}

/* ============================================================
   responsive — 响应式断点：1024px / 768px / 390px
   ============================================================ */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

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

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

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

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

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

  .rule-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .navmap-layout {
    grid-template-columns: 1fr;
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .header-inner {
    min-height: 56px;
    padding: 0 16px;
    gap: 16px;
  }

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

  .nav-toggle {
    display: block;
    order: 2;
  }

  .site-nav {
    position: static;
    order: 3;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-line);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
    z-index: 99;
    box-shadow: 0 8px 16px rgba(43, 58, 74, 0.08);
  }

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

  .nav-list li a {
    display: block;
    padding: 12px 8px;
    border-bottom: 1px solid var(--color-line);
    border-bottom-color: var(--color-line);
    font-size: 15px;
  }

  .nav-list li a.is-current {
    border-bottom: 1px solid var(--color-line);
    color: var(--color-point);
    font-weight: 600;
  }

  .sitemap-link {
    display: none;
  }

  .hero-section {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-panels {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

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

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

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

  .scene-card-grid {
    grid-template-columns: 1fr;
  }

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

  .date-group-item ul {
    grid-template-columns: 1fr;
  }

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

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

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

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 16px 16px;
  }

  .copyright {
    grid-column: 1;
  }

  .inner-main {
    padding: 24px 16px 48px;
  }

  .home-main {
    padding: 24px 16px 48px;
  }

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

  .section-head {
    flex-direction: column;
    gap: 4px;
  }

  .table-wrap table {
    min-width: 520px;
  }

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

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

  .error-actions {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 390px) {
  .header-inner {
    padding: 0 12px;
  }

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

  .brand-name::before {
    font-size: 14px;
    margin-right: 6px;
  }

  .nav-list {
    top: 52px;
    padding: 8px 12px 16px;
  }

  .hero-section {
    padding: 0;
  }

  .update-panel,
  .topic-panel,
  .rank-card,
  .question-card,
  .scene-card,
  .taxonomy-card,
  .heat-item,
  .usage-item,
  .term-card {
    padding: 16px;
  }

  .work-meta {
    padding: 12px;
  }

  .work-title {
    font-size: 15px;
  }

  .filter-row {
    gap: 8px;
  }

  .filter-chip {
    padding: 5px 12px;
    font-size: 13px;
  }

  .notice-bar {
    padding: 16px;
  }

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

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

  .footer-grid {
    padding: 24px 12px 12px;
  }
}