/* ==========================================================================
   动漫天堂 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --canvas: #f4f4f2;
  --surface: #ffffff;
  --surface-alt: #ebebe8;
  --ink: #23262b;
  --ink-soft: #5c626b;
  --ink-faint: #858b93;
  --line: #d9dad6;
  --line-strong: #c2c4bf;
  --accent: #8c3b34;
  --accent-soft: #f0e2e0;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-card: 0 1px 2px rgba(35, 38, 43, 0.06);
  --font-body: "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", monospace;
  --wrap: 1180px;
  --wrap-narrow: 1080px;
  --gutter: 24px;
}

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

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

body {
  margin: 0;
  background-color: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

p {
  margin: 0;
}

ul, ol, dl, dd, figure {
  margin: 0;
  padding: 0;
}

ul, ol {
  list-style: none;
}

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

a:hover,
a:focus-visible {
  color: #6f2c26;
  text-decoration: underline;
  text-underline-offset: 3px;
}

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

button {
  font: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   layout · 骨架
   -------------------------------------------------------------------------- */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: var(--canvas);
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
}

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

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 12px var(--gutter);
}

.brand {
  display: inline-flex;
  flex-direction: column;
  gap: 2px;
  color: var(--ink);
  text-decoration: none;
}

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

.brand-mark {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.2;
}

.brand-slogan {
  font-size: 12px;
  line-height: 1.4;
  color: var(--ink-faint);
  font-family: var(--font-mono);
}

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

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

.nav-item {
  display: block;
}

.nav-link {
  display: block;
  padding: 8px 12px;
  min-height: 40px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  text-decoration: none;
}

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

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

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

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

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

.inner-main {
  display: block;
}

.site-footer {
  margin-top: 48px;
  background-color: #e9e9e6;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 36px var(--gutter) 24px;
}

.footer-brand {
  flex: 1 1 240px;
  min-width: 220px;
}

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

.footer-brand-desc {
  margin-top: 8px;
  max-width: 340px;
  font-size: 14px;
  line-height: 1.8;
}

.footer-nav {
  display: flex;
  flex: 2 1 560px;
  flex-wrap: wrap;
  gap: 28px;
}

.footer-group {
  flex: 1 1 160px;
  min-width: 150px;
}

.footer-group-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0;
}

.footer-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-link {
  display: inline-block;
  padding: 3px 0;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

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

.footer-copy {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px var(--gutter);
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

/* 内页统一主容器与标题区 */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 36px;
  align-items: start;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px var(--gutter) 8px;
}

.main-column,
.main-content,
.page-content {
  min-width: 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  margin-bottom: 14px;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

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

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

.page-header {
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.page-description {
  margin-top: 12px;
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.page-description a {
  color: var(--accent);
}

/* 通用 section 区块 */

.section {
  margin-bottom: 40px;
}

.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.section-lead {
  margin-top: 10px;
  max-width: 760px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.section-desc {
  margin-top: 8px;
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.section-head {
  margin-bottom: 20px;
}

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

.text-link {
  display: inline-block;
  padding: 2px 0;
  font-size: 14px;
  color: var(--accent);
  border-bottom: 1px solid var(--accent-soft);
  text-decoration: none;
}

.text-link:hover,
.text-link:focus-visible {
  border-bottom-color: var(--accent);
  text-decoration: none;
}

.panel-title {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

/* --------------------------------------------------------------------------
   components · 通用组件
   -------------------------------------------------------------------------- */

/* 封面卡（首页封面墙） */

.cover-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.cover-card {
  margin: 0;
  padding: 8px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

.cover-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 6px rgba(35, 38, 43, 0.1);
}

.cover-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  border-radius: var(--radius-sm);
  background-color: var(--surface-alt);
}

.cover-caption {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
}

.cover-name {
  display: block;
  font-weight: 700;
  color: var(--ink);
}

.cover-tag {
  display: inline-block;
  margin-top: 4px;
  padding: 1px 6px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--ink-soft);
  background-color: var(--surface-alt);
  border-radius: var(--radius-sm);
}

/* 更新记录行（首页 / 更新页共用基础） */

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

.update-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
}

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

.update-link {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.update-link:hover,
.update-link:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.update-meta {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

/* 位次条目（首页 / 榜单页共用基础） */

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

.ranking-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

.ranking-no {
  flex: 0 0 34px;
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
}

.ranking-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

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

/* 侧栏 */

.sidebar {
  min-width: 0;
}

.related-sidebar {
  min-width: 0;
}

.sidebar-block,
.side-block {
  padding: 16px 18px;
  margin-bottom: 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sidebar-title,
.side-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.sidebar-text,
.side-text {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.sidebar-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sidebar-item {
  display: block;
}

.sidebar-link {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
}

.sidebar-link:hover,
.sidebar-link:focus-visible {
  color: var(--accent);
  text-decoration: underline;
}

.side-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
}

.side-link:hover,
.side-link:focus-visible {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.fact-bar {
  background-color: #e6e6e2;
  border-bottom: 1px solid var(--line);
}

.fact-bar-text {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px var(--gutter);
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--ink-soft);
}

.home-main {
  display: block;
}

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

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px;
  align-items: center;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--gutter) 48px;
}

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

.hero-eyebrow {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
}

.hero-title {
  margin-top: 10px;
  font-size: 34px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.hero-lead {
  margin-top: 14px;
  max-width: 560px;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-soft);
}

.hero-paths {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

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

.hero-path-link {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 44px;
  padding: 12px 14px;
  background-color: var(--canvas);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.hero-path-link:hover,
.hero-path-link:focus-visible {
  border-color: var(--accent);
  background-color: var(--accent-soft);
  text-decoration: none;
}

.hero-path-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.hero-path-desc {
  font-size: 12px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.hero-visual {
  margin: 0;
  min-width: 0;
}

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

.hero-visual-caption {
  margin-top: 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

.topics-overview {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--gutter) 8px;
}

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

.topic-column {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease;
}

.topic-column:hover {
  border-color: var(--accent);
}

.topic-index {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
}

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

.topic-trait {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.topic-clue {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px dashed var(--line);
  font-size: 12px;
  font-family: var(--font-mono);
  line-height: 1.7;
  color: var(--ink-faint);
}

.updates-wall {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--gutter) 8px;
}

.updates-wall-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.15fr);
  gap: 32px;
  align-items: start;
  margin-top: 20px;
}

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

.update-group {
  margin-top: 16px;
}

.update-date {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line);
}

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

.cover-wall .cover-grid {
  margin-top: 16px;
}

.ranking-preview {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--gutter) 8px;
}

.ranking-preview .ranking-list {
  margin-top: 4px;
  padding: 4px 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-brief {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--gutter) 8px;
}

.field-brief-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
  margin-top: 20px;
}

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

.field-list {
  margin-top: 14px;
  display: grid;
  grid-template-columns: minmax(0, 120px) minmax(0, 1fr);
  gap: 0;
}

.field-name {
  padding: 10px 0;
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--ink);
  border-top: 1px solid var(--line);
}

.field-desc {
  padding: 10px 0;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.boundary-list {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.boundary-item {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--accent);
  border-radius: 50%;
}

.site-index {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px var(--gutter) 12px;
}

.index-nav {
  margin-top: 20px;
}

.index-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.index-item {
  min-width: 0;
}

.index-link {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-height: 44px;
  padding: 14px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.index-link:hover,
.index-link:focus-visible {
  border-color: var(--accent);
  background-color: var(--accent-soft);
  text-decoration: none;
}

.index-desc {
  font-size: 12px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 题材分类
   -------------------------------------------------------------------------- */

.topics-intro .section-lead a {
  color: var(--accent);
}

.topics-list .topic-block {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 20px 0;
  border-top: 1px solid var(--line);
}

.topics-list .topic-block:last-child {
  border-bottom: 1px solid var(--line);
}

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

.cover-figure {
  margin: 0;
}

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

.cover-figure .cover-caption {
  margin-top: 8px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

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

.topics-list .topic-index {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
}

.topics-list .topic-name {
  margin-top: 4px;
  font-size: 19px;
}

.topic-feature {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.topic-meta-col {
  min-width: 0;
  padding: 12px 14px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.topic-meta-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

.topic-meta-list {
  margin-top: 8px;
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.topic-meta-list li {
  position: relative;
  padding-left: 13px;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.topic-meta-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  background-color: var(--line-strong);
  border-radius: 50%;
}

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

.topics-rhythm .rhythm-item {
  min-width: 0;
  padding: 16px 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.topics-rhythm .rhythm-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.topics-rhythm .rhythm-desc {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 最近更新
   -------------------------------------------------------------------------- */

.update-log .section-lead {
  margin-bottom: 20px;
}

.update-day {
  padding: 18px 20px;
  margin-bottom: 16px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.update-day-title {
  font-size: 15px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

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

.update-log .update-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 6px 14px;
  align-items: start;
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

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

.update-cover {
  grid-row: span 2;
  width: 72px;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--surface-alt);
}

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

.update-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.update-meta {
  margin-top: 4px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 10px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

.update-tag {
  display: inline-block;
  padding: 1px 6px;
  background-color: var(--surface-alt);
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
}

.update-note {
  grid-column: 2;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.rhythm-notes .rhythm-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

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

.rhythm-term {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.rhythm-desc {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.read-tips .tip-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.tip-item {
  min-width: 0;
  padding: 14px 16px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.tip-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.tip-text {
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 人气榜单
   -------------------------------------------------------------------------- */

.layout-shell {
  align-items: start;
}

.ranking-section .section-lead {
  margin-bottom: 18px;
}

.ranking-section .ranking-list {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 20px;
}

.ranking-section .ranking-item {
  display: grid;
  grid-template-columns: 64px 46px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
}

.ranking-section .ranking-item:last-child {
  border-bottom: 0;
}

.ranking-cover {
  margin: 0;
  width: 64px;
}

.ranking-cover img {
  width: 64px;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--surface-alt);
}

.ranking-rank {
  font-size: 20px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--accent);
  line-height: 1.2;
}

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

.ranking-body .ranking-name {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.ranking-body .ranking-note {
  display: block;
  margin-top: 6px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.ranking-meta {
  margin-top: 8px;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 12px;
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--ink-faint);
}

.ranking-link {
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
}

.ranking-link:hover,
.ranking-link:focus-visible {
  text-decoration: underline;
}

.ranking-notes {
  margin-top: 36px;
}

.ranking-notes p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.note-list {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.note-item {
  min-width: 0;
  padding: 14px 16px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.ranking-rules {
  margin-top: 36px;
}

.ranking-rules > p {
  margin-top: 10px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.rule-list {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  counter-reset: rule;
}

.rule-item {
  min-width: 0;
  padding: 16px 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.rule-item p {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 阅读说明
   -------------------------------------------------------------------------- */

.guide-section {
  margin-bottom: 40px;
}

.glossary-layout {
  margin-top: 20px;
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 24px;
  align-items: start;
}

.glossary-figure {
  margin: 0;
  min-width: 0;
}

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

.glossary-caption {
  margin-top: 8px;
  font-size: 12px;
  font-family: var(--font-mono);
  line-height: 1.7;
  color: var(--ink-faint);
}

.glossary-list {
  min-width: 0;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 4px 20px;
}

.glossary-row {
  display: grid;
  grid-template-columns: minmax(0, 140px) minmax(0, 1fr);
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
}

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

.glossary-term {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--ink);
}

.glossary-desc {
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

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

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

.scope-heading {
  font-size: 15px;
  font-weight: 700;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.scope-in .scope-heading {
  color: var(--ink);
}

.scope-out .scope-heading {
  color: var(--accent);
}

.scope-list {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.scope-item {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.scope-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--line-strong);
  border-radius: 50%;
}

.scope-out .scope-item::before {
  background-color: var(--accent);
}

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

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

.path-index {
  font-size: 12px;
  font-family: var(--font-mono);
  color: var(--accent);
}

.path-title {
  margin-top: 6px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.path-text {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.path-note {
  margin-top: 16px;
  padding: 12px 16px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
  background-color: var(--surface-alt);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.faq-list {
  margin-top: 20px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 18px;
}

.faq-question {
  padding: 14px 26px 14px 0;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  cursor: pointer;
  position: relative;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 13px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--accent);
}

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

.faq-answer {
  padding: 0 0 16px;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.inline-link {
  color: var(--accent);
}

.page-aside {
  min-width: 0;
}

.aside-block {
  padding: 16px 18px;
  margin-bottom: 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.aside-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.aside-text {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.aside-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 13px;
  color: var(--accent);
  text-decoration: none;
}

.aside-link:hover,
.aside-link:focus-visible {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  display: flex;
  justify-content: center;
  width: 100%;
  padding: 64px var(--gutter);
}

.error-panel {
  width: 100%;
  max-width: 720px;
  padding: 40px 32px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}

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

.error-title {
  margin-top: 10px;
  font-size: 26px;
  font-weight: 700;
  color: var(--ink);
}

.error-desc {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.error-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--ink);
  background-color: var(--canvas);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
  text-decoration: none;
  transition: border-color 0.18s ease, background-color 0.18s ease;
}

.error-button:hover,
.error-button:focus-visible {
  border-color: var(--accent);
  background-color: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

@media (max-width: 1024px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr) 260px;
    gap: 28px;
  }

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

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

  .hero-inner {
    gap: 28px;
  }

  .hero-title {
    font-size: 30px;
  }
}

@media (max-width: 860px) {
  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    padding: 32px var(--gutter) 36px;
  }

  .hero-visual {
    order: 2;
  }

  .updates-wall-inner,
  .field-brief-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .topics-list .topic-block {
    grid-template-columns: 140px minmax(0, 1fr);
  }

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

  .glossary-figure {
    max-width: 220px;
  }

  .note-list,
  .rule-list,
  .path-list,
  .topics-rhythm .rhythm-list {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 640px) {
  :root {
    --gutter: 16px;
  }

  body {
    font-size: 15px;
  }

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    padding: 6px 0;
    border-top: 1px solid var(--line);
  }

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

  .nav-link {
    padding: 11px 4px;
    min-height: 44px;
    border-bottom: 1px solid var(--line);
  }

  .nav-link.is-current {
    border-bottom-color: var(--line);
    border-left: 3px solid var(--accent);
    padding-left: 10px;
  }

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

  .hero-title {
    font-size: 25px;
  }

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

  .topic-grid,
  .cover-grid,
  .index-list,
  .note-list,
  .rule-list,
  .path-list,
  .topics-rhythm .rhythm-list,
  .rhythm-notes .rhythm-list,
  .read-tips .tip-list,
  .scope-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .topics-list .topic-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .topic-media {
    max-width: 180px;
  }

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

  .field-list,
  .glossary-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 0;
  }

  .field-name,
  .glossary-term {
    padding-bottom: 0;
  }

  .field-desc,
  .glossary-desc {
    padding-top: 4px;
  }

  .update-log .update-row {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .update-cover {
    width: 60px;
  }

  .update-note {
    grid-column: 2;
  }

  .ranking-section .ranking-list {
    padding: 0 14px;
  }

  .ranking-section .ranking-item {
    grid-template-columns: 52px 34px minmax(0, 1fr);
    gap: 10px;
  }

  .ranking-cover,
  .ranking-cover img {
    width: 52px;
  }

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

  .ranking-preview .ranking-list {
    padding: 4px 14px;
  }

  .ranking-item {
    gap: 2px 10px;
  }

  .footer-inner {
    padding: 28px var(--gutter) 18px;
    gap: 24px;
  }

  .footer-nav {
    gap: 20px;
  }

  .footer-group {
    flex: 1 1 45%;
    min-width: 130px;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}