/* ==========================================================================
   樱花视频 · akwznam.cn 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

:root {
  --color-primary: #d98ba1;
  --color-ink: #2c3440;
  --color-muted: #5a6b7b;
  --color-bg: #f7f5f3;
  --color-surface: #ffffff;
  --color-accent: #3f6b6b;
  --color-line: #dcd8d4;
  --color-line-soft: #e8e4e0;
  --color-tint: #fbf0f3;
  --font-sans: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", sans-serif;
  --font-serif: "Songti SC", "SimSun", "Source Han Serif SC", Georgia, serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "Courier New", monospace;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-card: 0 1px 2px rgba(44, 52, 64, 0.06), 0 6px 16px rgba(44, 52, 64, 0.05);
  --shell-width: 1200px;
}

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

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

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

h1,
h2,
h3,
h4 {
  font-family: var(--font-sans);
  color: var(--color-ink);
  line-height: 1.4;
  margin: 0 0 0.6em;
  font-weight: 700;
}

h1 {
  font-size: 1.9rem;
}

h2 {
  font-size: 1.42rem;
}

h3 {
  font-size: 1.12rem;
}

p {
  margin: 0 0 1em;
}

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

a:hover,
a:focus-visible {
  color: var(--color-primary);
}

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

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

li {
  margin-bottom: 0.35em;
}

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

figure {
  margin: 0;
}

figcaption {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--color-muted);
  line-height: 1.6;
  margin-top: 0.5em;
}

table {
  border-collapse: collapse;
  width: 100%;
}

time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

.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
   -------------------------------------------------------------------------- */

.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--color-bg);
}

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

.header-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 24px;
  min-height: 68px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--color-ink);
  padding: 10px 0;
}

.brand:hover,
.brand:focus-visible {
  color: var(--color-ink);
}

.brand-name {
  font-family: var(--font-sans);
  font-size: 1.28rem;
  font-weight: 700;
  letter-spacing: 0.01em;
}

.brand-tagline {
  font-family: var(--font-sans);
  font-size: 0.76rem;
  color: var(--color-muted);
  line-height: 1.5;
}

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

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px;
}

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: block;
  padding: 10px 14px;
  min-height: 44px;
  font-family: var(--font-sans);
  font-size: 0.94rem;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background-color: var(--color-tint);
  color: var(--color-accent);
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 46px;
  height: 46px;
  padding: 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--color-ink);
}

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

.site-footer {
  margin-top: 48px;
  background-color: #2c3440;
  color: #d9dee4;
  font-family: var(--font-sans);
  font-size: 0.9rem;
}

.footer-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 40px 24px 24px;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 28px 32px;
}

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

.footer-title {
  font-size: 0.98rem;
  color: #ffffff;
  margin-bottom: 0.7em;
}

.footer-about p {
  color: #b9c2cb;
  line-height: 1.75;
  margin: 0;
}

.footer-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-list li {
  margin-bottom: 0.5em;
}

.footer-list a {
  color: #c6ced7;
}

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

.footer-bottom {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  justify-content: space-between;
}

.footer-bottom p {
  margin: 0;
  font-size: 0.82rem;
  color: #9aa5b0;
}

/* 内页统一骨架 */

.inner-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 24px 24px 0;
  width: 100%;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  color: var(--color-muted);
  margin-bottom: 14px;
}

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

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

.breadcrumb-sep {
  color: #b3b8bd;
}

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

.page-header {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: 26px;
}

.page-title {
  font-size: 1.9rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 0.35em;
}

.page-description {
  max-width: 76ch;
  color: var(--color-muted);
  font-size: 1rem;
  margin: 0;
}

/* 内页三栏外壳：主内容在前，aside 在后 */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 268px;
  gap: 32px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 232px minmax(0, 1fr);
}

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

/* --------------------------------------------------------------------------
   components · 通用模块
   -------------------------------------------------------------------------- */

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

.section-head h2 {
  margin-bottom: 0.35em;
}

.section-head p {
  color: var(--color-muted);
  max-width: 78ch;
  margin: 0;
}

.content-section {
  margin-bottom: 44px;
}

.section-title {
  font-size: 1.34rem;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--color-line-soft);
  margin-bottom: 0.6em;
}

.section-intro,
.section-desc {
  color: var(--color-muted);
  max-width: 78ch;
}

.section-foot,
.section-footnote,
.section-note,
.advice-foot {
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin: 18px 0 0;
}

.section-foot a,
.section-footnote a,
.section-note a,
.advice-foot a {
  border-bottom: 1px solid var(--color-line);
  padding-bottom: 1px;
}

/* 图片容器统一约束 */

.hero-figure,
.topic-cover,
.topic-figure,
.section-media,
.content-figure,
.archive-figure {
  overflow: hidden;
  border-radius: var(--radius);
  background-color: #ece7e3;
}

.hero-figure img,
.topic-cover img,
.topic-figure img,
.section-media img,
.content-figure img,
.archive-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 页面目录 / 侧栏 */

.page-sidebar,
.page-side,
.layout-index,
.layout-aside {
  min-width: 0;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px 18px 14px;
}

.sidebar-title,
.side-title,
.index-title,
.aside-title {
  font-size: 0.98rem;
  margin-bottom: 0.7em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line-soft);
}

.toc-list,
.index-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.toc-list li,
.index-list li {
  margin-bottom: 2px;
}

.toc-list a,
.index-list a {
  display: block;
  padding: 9px 8px;
  min-height: 44px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-ink);
  border-radius: var(--radius-sm);
  border-left: 2px solid transparent;
}

.toc-list a:hover,
.toc-list a:focus-visible,
.index-list a:hover,
.index-list a:focus-visible {
  background-color: var(--color-tint);
  color: var(--color-accent);
}

.index-note {
  font-family: var(--font-sans);
  font-size: 0.84rem;
  color: var(--color-muted);
  margin: 14px 0 0;
  padding-top: 12px;
  border-top: 1px solid var(--color-line-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 14px;
}

/* 表格 */

.channel-table-wrap,
.table-scroll {
  overflow-x: auto;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
}

.data-table,
.channel-table {
  min-width: 640px;
  font-family: var(--font-sans);
  font-size: 0.92rem;
}

.data-table caption,
.channel-table caption {
  text-align: left;
}

.data-table th,
.data-table td,
.channel-table th,
.channel-table td {
  padding: 12px 14px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--color-line-soft);
}

.data-table thead th,
.channel-table thead th {
  background-color: #f1eeeb;
  color: var(--color-ink);
  font-weight: 700;
  white-space: nowrap;
  border-bottom: 1px solid var(--color-line);
}

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

.data-table tbody tr:hover,
.channel-table tbody tr:hover {
  background-color: var(--color-tint);
}

.col-code {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
  color: var(--color-accent);
  font-weight: 700;
  white-space: nowrap;
}

/* 专题片单卡 */

.topic-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

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

.topic-card:hover,
.topic-card:focus-within {
  box-shadow: var(--shadow-card);
  transform: translateY(-2px);
}

.topic-cover,
.topic-figure {
  border-radius: 0;
  aspect-ratio: 16 / 9;
}

.topic-name {
  font-size: 1.08rem;
  margin: 0.9em 0 0.4em;
}

.topic-theme {
  margin: 0 0 0.5em;
  color: var(--color-muted);
  font-size: 0.94rem;
}

.topic-channels {
  font-family: var(--font-sans);
  font-size: 0.84rem;
  color: var(--color-accent);
  margin: 0;
}

/* 首页卡片内边距（无 .topic-body 包裹） */

.home-topics .topic-card {
  padding: 0 0 18px;
}

.home-topics .topic-name,
.home-topics .topic-theme,
.home-topics .topic-channels {
  padding-left: 18px;
  padding-right: 18px;
}

/* 内页片单卡：图文结构 */

.topic-body {
  padding: 16px 18px 18px;
}

.topic-body .topic-name {
  margin-top: 0;
}

.topic-count {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--color-accent);
  background-color: var(--color-tint);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  margin-bottom: 10px;
}

/* 更新归档（首页速览） */

.archive-months {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.archive-month {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 18px;
}

.archive-month-title {
  font-size: 1rem;
  margin-bottom: 0.7em;
}

.archive-list {
  list-style: none;
  margin: 0 0 0.8em;
  padding: 0;
}

.archive-list li {
  position: relative;
  padding-left: 14px;
  margin-bottom: 0.6em;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.archive-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.archive-tags {
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-accent);
  margin: 0;
  padding-top: 10px;
  border-top: 1px dashed var(--color-line);
}

/* 浏览顺序四步 */

.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.step-item {
  position: relative;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px 16px;
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-name {
  font-size: 1rem;
  margin-bottom: 0.4em;
}

.step-field {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

/* 字段口径与收录边界（首页摘要） */

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

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

.fields-col h3 {
  font-size: 1.04rem;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line-soft);
}

.field-list {
  margin: 0;
}

.field-list dt {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--color-accent);
  margin-top: 12px;
}

.field-list dt:first-of-type {
  margin-top: 0;
}

.field-list dd {
  margin: 2px 0 0;
  font-size: 0.92rem;
  color: var(--color-muted);
}

.boundary-list {
  margin: 0;
  padding-left: 1.1em;
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* 站内栏目索引 */

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

.section-index-item {
  display: block;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 16px;
  color: var(--color-ink);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.section-index-item:hover,
.section-index-item:focus-visible {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-card);
  color: var(--color-ink);
}

.section-index-item h3 {
  font-size: 0.98rem;
  margin-bottom: 0.4em;
}

.section-index-item p {
  margin: 0;
  font-size: 0.86rem;
  color: var(--color-muted);
}

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

.site-lead-bar {
  background-color: var(--color-tint);
  border-bottom: 1px solid var(--color-line);
}

.site-lead-bar p {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 9px 24px;
  font-family: var(--font-sans);
  font-size: 0.84rem;
  color: var(--color-accent);
}

.home-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 24px;
  width: 100%;
}

.home-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 28px 40px;
  align-items: start;
  padding: 40px 0 44px;
  border-bottom: 1px solid var(--color-line);
}

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

.hero-title {
  font-size: 2.1rem;
  margin-bottom: 0.4em;
}

.hero-desc {
  font-size: 1.02rem;
  color: var(--color-muted);
  max-width: 46ch;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 6px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  font-family: var(--font-sans);
  font-size: 0.94rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  transition: background-color 0.18s ease, color 0.18s ease, border-color 0.18s ease;
}

.btn-primary {
  background-color: var(--color-accent);
  color: #ffffff;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: #345a5a;
  color: #ffffff;
}

.btn-ghost {
  background-color: transparent;
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background-color: var(--color-accent);
  color: #ffffff;
}

.hero-figure {
  aspect-ratio: 16 / 10;
}

.hero-index {
  grid-column: 1 / -1;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 22px;
}

.hero-index-title {
  font-size: 1.04rem;
  margin-bottom: 0.7em;
}

.hero-index-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px 18px;
}

.hero-index-list li {
  margin: 0;
}

.hero-index-list a {
  display: block;
  min-height: 44px;
  padding: 10px 12px;
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-ink);
  background-color: var(--color-bg);
  border: 1px solid var(--color-line-soft);
  border-radius: var(--radius-sm);
}

.hero-index-list a:hover,
.hero-index-list a:focus-visible {
  background-color: var(--color-tint);
  border-color: var(--color-primary);
  color: var(--color-accent);
}

.home-channels,
.home-topics,
.home-archive,
.home-steps,
.home-fields,
.home-sections {
  padding: 40px 0;
  border-bottom: 1px solid var(--color-line);
}

.home-sections {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   pages · 频道分类（channel）
   -------------------------------------------------------------------------- */

.channel-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

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

.note-title {
  font-size: 1.02rem;
  margin-bottom: 0.5em;
}

.channel-note p {
  margin-bottom: 0.7em;
  font-size: 0.94rem;
  color: var(--color-muted);
}

.note-list {
  margin: 0;
  padding-left: 1.1em;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.map-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-surface);
  overflow: hidden;
}

.map-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 14px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--color-line-soft);
}

.map-item:last-child {
  border-bottom: none;
}

.map-item:hover {
  background-color: var(--color-tint);
}

.map-channel {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.94rem;
  color: var(--color-ink);
  min-width: 96px;
}

.map-arrow {
  color: var(--color-primary);
  font-family: var(--font-mono);
}

.map-topics {
  font-size: 0.9rem;
  color: var(--color-muted);
  flex: 1 1 auto;
  min-width: 0;
}

/* --------------------------------------------------------------------------
   pages · 专题片单（topic）
   -------------------------------------------------------------------------- */

.reasoning-list {
  display: grid;
  gap: 16px;
}

.reasoning-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 18px 20px;
}

.reasoning-name {
  font-size: 1.02rem;
  margin-bottom: 0.4em;
}

.reasoning-text {
  margin-bottom: 0.7em;
  font-size: 0.94rem;
  color: var(--color-muted);
}

.channel-tags {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.channel-tags li {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.8rem;
  color: var(--color-accent);
  background-color: var(--color-tint);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
}

.advice-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

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

.advice-name {
  font-size: 1rem;
  margin-bottom: 0.4em;
}

.advice-text {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* --------------------------------------------------------------------------
   pages · 字段口径（field-guide）
   -------------------------------------------------------------------------- */

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

.field-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 16px;
  padding: 13px 18px;
  border-bottom: 1px solid var(--color-line-soft);
}

.field-row:last-child {
  border-bottom: none;
}

.field-row:hover {
  background-color: var(--color-tint);
}

.field-head {
  background-color: #f1eeeb;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.9rem;
}

.field-name {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.93rem;
  color: var(--color-accent);
}

.field-desc {
  font-size: 0.93rem;
  color: var(--color-muted);
}

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

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

.boundary-title {
  font-size: 1rem;
  margin-bottom: 0.5em;
}

.boundary-card .boundary-list {
  margin: 0;
}

/* 字段与条目展示对应关系 */

.map-heading {
  font-size: 0.98rem;
  margin-bottom: 0.35em;
}

.map-item p {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-muted);
}

/* FAQ */

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 4px 18px;
}

.faq-item summary {
  cursor: pointer;
  padding: 12px 26px 12px 0;
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: 0.98rem;
  color: var(--color-ink);
  list-style: none;
  position: relative;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  color: var(--color-primary);
  font-size: 1.1rem;
}

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

.faq-item p {
  margin: 0 0 14px;
  font-size: 0.93rem;
  color: var(--color-muted);
  border-top: 1px dashed var(--color-line);
  padding-top: 12px;
}

/* --------------------------------------------------------------------------
   pages · 更新归档（archive）
   -------------------------------------------------------------------------- */

.archive-lead {
  margin-bottom: 40px;
}

.archive-figure {
  aspect-ratio: 16 / 7;
  margin-top: 16px;
}

.archive-years,
.archive-months,
.archive-related,
.archive-reading,
.archive-feedback {
  margin-bottom: 40px;
}

.year-group {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
}

.year-heading {
  font-family: var(--font-mono);
  font-size: 1.16rem;
  color: var(--color-accent);
  margin-bottom: 0.3em;
}

.year-note {
  font-size: 0.9rem;
  color: var(--color-muted);
  margin-bottom: 1em;
}

.year-month-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px 18px;
}

.year-month-item {
  font-size: 0.9rem;
  color: var(--color-muted);
  padding: 8px 12px;
  border-left: 2px solid var(--color-primary);
  background-color: var(--color-bg);
  border-radius: var(--radius-sm);
}

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

.month-heading {
  font-family: var(--font-mono);
  font-size: 1.06rem;
  margin-bottom: 0.6em;
  color: var(--color-ink);
}

.month-summary-list {
  list-style: none;
  margin: 0 0 0.8em;
  padding: 0;
}

.month-summary-item {
  position: relative;
  padding-left: 16px;
  margin-bottom: 0.55em;
  font-size: 0.93rem;
  color: var(--color-muted);
}

.month-summary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-primary);
}

.month-involved {
  margin: 0;
  font-family: var(--font-sans);
  font-size: 0.82rem;
  color: var(--color-accent);
  padding-top: 10px;
  border-top: 1px dashed var(--color-line);
}

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

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

.related-heading {
  font-size: 1rem;
  margin-bottom: 0.7em;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line-soft);
}

.related-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.related-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--color-line-soft);
  font-size: 0.92rem;
}

.related-item:last-child {
  border-bottom: none;
}

.related-name {
  font-family: var(--font-sans);
  color: var(--color-ink);
  font-weight: 700;
}

.related-count {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--color-muted);
}

.reading-steps {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

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

.reading-step .step-no {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background-color: var(--color-primary);
  color: #ffffff;
  font-family: var(--font-mono);
  font-size: 0.88rem;
  font-weight: 700;
  margin-bottom: 10px;
}

.reading-step .step-title {
  font-size: 1rem;
  margin-bottom: 0.4em;
}

.reading-step p {
  margin: 0;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.feedback-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 12px;
}

.feedback-item {
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  padding: 14px 18px;
  font-size: 0.93rem;
  color: var(--color-muted);
}

.summary-tag {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  color: var(--color-accent);
  background-color: var(--color-tint);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  margin-right: 6px;
}

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

.error-main {
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 0;
  width: 100%;
}

.error-panel {
  text-align: left;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-primary);
  margin: 0 0 0.2em;
  line-height: 1;
}

.error-panel h1 {
  font-size: 1.6rem;
  margin-bottom: 0.5em;
}

.error-panel p {
  color: var(--color-muted);
}

.error-action {
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 22px;
  margin-top: 8px;
  background-color: var(--color-accent);
  color: #ffffff;
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.94rem;
}

.error-action:hover,
.error-action:focus-visible {
  background-color: #345a5a;
  color: #ffffff;
}

.error-hint {
  margin-top: 32px;
  padding-bottom: 40px;
}

.error-hint h2 {
  font-size: 1.16rem;
}

.error-hint-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
}

.error-hint-list li {
  margin: 0;
}

.error-hint-list a {
  display: block;
  min-height: 44px;
  padding: 11px 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  color: var(--color-ink);
}

.error-hint-list a:hover,
.error-hint-list a:focus-visible {
  border-color: var(--color-primary);
  color: var(--color-accent);
}

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

@media (max-width: 1024px) {
  .header-inner {
    gap: 12px 18px;
  }

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

  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .page-sidebar,
  .page-side,
  .layout-index,
  .layout-aside {
    order: 2;
  }

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

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

  .archive-months,
  .step-list,
  .section-index,
  .advice-list,
  .reading-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

@media (max-width: 720px) {
  body {
    font-size: 16.5px;
  }

  .header-inner {
    padding: 10px 16px;
    min-height: 60px;
    align-items: flex-start;
  }

  .brand {
    padding: 0;
  }

  .brand-name {
    font-size: 1.16rem;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    order: 3;
    width: 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 4px;
    border-top: 1px solid var(--color-line-soft);
  }

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

  .nav-list a {
    padding: 12px 10px;
    border-bottom: none;
    border-left: 2px solid transparent;
  }

  .nav-list a.is-current {
    border-bottom-color: transparent;
    border-left-color: var(--color-primary);
    background-color: var(--color-tint);
  }

  .site-lead-bar p,
  .home-main,
  .inner-main,
  .footer-inner,
  .footer-bottom {
    padding-left: 16px;
    padding-right: 16px;
  }

  .site-lead-bar p {
    font-size: 0.8rem;
    line-height: 1.6;
  }

  .hero-title,
  .page-title {
    font-size: 1.5rem;
  }

  .hero-index-list,
  .topic-grid,
  .archive-months,
  .step-list,
  .fields-columns,
  .section-index,
  .channel-notes,
  .advice-list,
  .boundary-grid,
  .related-columns,
  .reading-steps,
  .year-month-list,
  .error-hint-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .field-head {
    display: none;
  }

  .field-name {
    color: var(--color-accent);
  }

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

  .footer-bottom {
    flex-direction: column;
  }

  .error-main {
    padding: 36px 16px 0;
  }

  .error-panel {
    padding: 24px 20px;
  }

  .error-code {
    font-size: 2.4rem;
  }

  .map-item {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .map-channel {
    min-width: 0;
  }

  .map-arrow {
    display: none;
  }
}