/* ==========================================================================
   天美麻花MV · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

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

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

:root {
  --paper: #f6f1e8;
  --card: #fffdf8;
  --ink: #2e2620;
  --ink-soft: #6b5d4f;
  --line: #ddd2c2;
  --accent: #9a4b2f;
  --confirm: #3f5a52;
  --radius: 4px;
  --shadow: 0 1px 2px rgba(46, 38, 32, 0.06);
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", serif;
  --font-mono: "IBM Plex Mono", "SFMono-Regular", "Consolas", "Menlo", monospace;
  --container: 1120px;
  --gutter: 20px;
}

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

.site-body {
  margin: 0;
  padding: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-serif);
  font-size: 17px;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

p {
  margin: 0 0 1em;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color 150ms ease, text-decoration-color 150ms ease;
}

a:hover,
a:focus-visible {
  color: var(--accent);
  text-decoration: underline;
  text-decoration-thickness: 1px;
  text-underline-offset: 3px;
}

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

li {
  list-style: none;
}

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

figure {
  margin: 0;
}

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

caption {
  text-align: left;
}

button {
  font-family: inherit;
}

.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;
}

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

/* ==========================================================================
   layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.site-main {
  display: block;
  padding-bottom: 56px;
}

.inner-main {
  padding-top: 0;
}

/* 主体内容与侧栏两列 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
  padding-top: 8px;
}

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

.sidebar,
.content-aside,
.side-column,
.page-aside {
  min-width: 0;
  font-size: 15px;
  line-height: 1.65;
}

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

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

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
  flex-shrink: 0;
}

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

.brand-rule {
  width: 3px;
  height: 26px;
  background-color: var(--accent);
  border-radius: 1px;
}

.brand-name {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.brand-code {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  padding: 2px 6px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
}

.main-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

.nav-list {
  display: flex;
  align-items: center;
  gap: 22px;
  flex-wrap: wrap;
}

.nav-link {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: var(--ink-soft);
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

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

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

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

.menu-bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 0 auto;
  background-color: var(--ink);
  border-radius: 1px;
  transition: transform 150ms ease, opacity 150ms ease;
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle[aria-expanded="true"] .menu-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  border-bottom: 1px solid var(--line);
  background-color: var(--card);
}

.mobile-nav[hidden] {
  display: none;
}

.mobile-nav-list {
  max-width: var(--container);
  margin: 0 auto;
  padding: 6px var(--gutter) 10px;
  display: flex;
  flex-direction: column;
}

.mobile-nav-link {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 0 10px;
  font-size: 16px;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 3px solid transparent;
}

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

.mobile-nav-link.is-current {
  color: var(--ink);
  font-weight: 700;
  border-left-color: var(--accent);
  background-color: var(--paper);
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  padding: 20px 0 4px;
  font-size: 13px;
  color: var(--ink-soft);
}

.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);
}

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

.page-header {
  padding: 6px 0 18px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--ink);
}

.page-title-block {
  padding: 6px 0 24px;
}

.page-kicker {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
}

.page-lead {
  max-width: 780px;
  margin: 0;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* ==========================================================================
   components · 通用区块标题
   ========================================================================== */

.section,
.section-block,
.content-section,
.catalog-section {
  padding: 32px 0;
  border-bottom: 1px solid var(--line);
}

.section:last-child,
.section-block:last-child,
.content-section:last-child,
.catalog-section:last-child {
  border-bottom: 0;
}

.section > h2,
.section-title,
.content-section > h2 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 22px;
  line-height: 1.4;
}

.section-index,
.section-num {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.section-intro {
  margin-bottom: 16px;
  color: var(--ink-soft);
}

.note-text {
  margin-top: 12px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.note-small {
  margin-top: 12px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* ==========================================================================
   components · 表格
   ========================================================================== */

.table-wrap {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card);
}

.data-table,
.rule-table,
.field-table,
.entry-field-table,
.compare-table,
.mapping-table {
  width: 100%;
  font-size: 15px;
  line-height: 1.6;
  background-color: var(--card);
}

.table-caption,
.rule-table caption,
.field-table caption,
.entry-field-table caption,
.compare-table caption,
.mapping-table caption {
  padding: 10px 12px;
  font-size: 13px;
  color: var(--ink-soft);
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.data-table th,
.data-table td,
.rule-table th,
.rule-table td,
.field-table th,
.field-table td,
.entry-field-table th,
.entry-field-table td,
.compare-table th,
.compare-table td,
.mapping-table th,
.mapping-table td {
  padding: 11px 12px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.data-table thead th,
.rule-table thead th,
.field-table thead th,
.entry-field-table thead th,
.compare-table thead th,
.mapping-table thead th {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  background-color: var(--paper);
  text-transform: uppercase;
  border-bottom: 1px solid var(--line);
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td,
.rule-table tbody tr:last-child th,
.rule-table tbody tr:last-child td,
.field-table tbody tr:last-child th,
.field-table tbody tr:last-child td,
.entry-field-table tbody tr:last-child th,
.entry-field-table tbody tr:last-child td,
.compare-table tbody tr:last-child th,
.compare-table tbody tr:last-child td,
.mapping-table tbody tr:last-child th,
.mapping-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover,
.rule-table tbody tr:hover,
.field-table tbody tr:hover,
.compare-table tbody tr:hover,
.mapping-table tbody tr:hover {
  background-color: var(--paper);
}

.rule-table tbody th,
.field-table tbody th,
.entry-field-table tbody th,
.compare-table tbody th,
.mapping-table tbody th {
  width: 30%;
  font-weight: 600;
  color: var(--ink);
  background-color: transparent;
}

.col-code,
.field-table tbody th,
.rule-table tbody th {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.04em;
}

.row-link {
  font-size: 14px;
  white-space: nowrap;
}

/* ==========================================================================
   components · 文字链接、标签、结论条
   ========================================================================== */

.text-link,
.inline-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  color: var(--accent);
  text-decoration: none;
  border-bottom: 1px solid var(--line);
  padding-bottom: 1px;
}

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

.text-link::after,
.inline-link::after {
  content: "→";
  font-family: var(--font-mono);
  font-size: 13px;
}

.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 22px;
}

.tag {
  padding: 3px 10px;
  font-size: 13px;
  color: var(--ink-soft);
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.status-tag,
.conclusion-tag,
.correction-status,
.record-status {
  display: inline-block;
  padding: 2px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--confirm);
  background-color: #eef2ee;
  border: 1px solid #c9d5cd;
  border-radius: var(--radius);
  white-space: nowrap;
}

.conclusion-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 10px;
  margin-top: 18px;
  padding: 14px 16px;
  background-color: #eef2ee;
  border: 1px solid #c9d5cd;
  border-radius: var(--radius);
  font-size: 15px;
  line-height: 1.7;
}

.conclusion-bar p {
  margin: 0;
}

.conclusion-label {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--confirm);
  text-transform: uppercase;
}

.conclusion-text {
  margin: 0;
  color: var(--ink);
}

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

.done-tag {
  display: inline-block;
  margin-top: 6px;
  padding: 2px 8px;
  font-size: 12px;
  color: var(--confirm);
  border: 1px dashed #c9d5cd;
  border-radius: var(--radius);
}

/* ==========================================================================
   components · 列表、步骤、清单
   ========================================================================== */

.step-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 16px 0 0;
  padding: 0;
  counter-reset: step;
}

.step-item {
  display: flex;
  gap: 14px;
  padding: 14px 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.step-index {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper);
}

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

.step-body h3 {
  margin-bottom: 4px;
  font-size: 17px;
}

.step-body p {
  margin-bottom: 6px;
  font-size: 15px;
  color: var(--ink-soft);
}

.step-done {
  margin: 0;
  font-size: 13px;
  color: var(--confirm);
}

.step-list--ordered {
  counter-reset: ordered-step;
}

.step-list--ordered .step-item {
  counter-increment: ordered-step;
}

.step-list--ordered .step-item::before {
  content: counter(ordered-step);
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--paper);
}

.check-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 16px;
}

.check-item {
  padding: 14px 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.check-item dt {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.check-item dt::before {
  content: "";
  flex-shrink: 0;
  width: 13px;
  height: 13px;
  border: 1px solid var(--accent);
  border-radius: 2px;
  background-color: var(--paper);
  transform: translateY(1px);
}

.check-item dd {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.fallback-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 16px;
}

.fallback-item {
  padding: 14px 16px;
  background-color: var(--card);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.fallback-item h3 {
  font-size: 16px;
  margin-bottom: 4px;
}

.fallback-item p {
  margin-bottom: 4px;
  font-size: 15px;
  color: var(--ink-soft);
}

.fallback-link {
  margin: 0;
  font-size: 14px;
}

/* ==========================================================================
   components · 折叠问答
   ========================================================================== */

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

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

.faq-item[open] {
  box-shadow: var(--shadow);
}

.faq-question {
  position: relative;
  padding: 14px 44px 14px 16px;
  font-size: 16px;
  font-weight: 700;
  line-height: 1.55;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  top: 50%;
  right: 16px;
  transform: translateY(-50%);
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--accent);
}

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

.faq-question:hover {
  color: var(--accent);
}

.faq-answer {
  padding: 0 16px 16px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.faq-answer p {
  margin-bottom: 8px;
}

.faq-more,
.faq-link {
  margin-top: 10px;
  font-size: 14px;
}

/* ==========================================================================
   components · 侧栏
   ========================================================================== */

.sidebar-block,
.aside-block,
.aside-nav,
.aside-related,
.aside-anchor,
.aside-note {
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.sidebar-block:last-child,
.aside-block:last-child,
.aside-nav:last-child,
.aside-related:last-child,
.aside-anchor:last-child,
.aside-note:last-child {
  margin-bottom: 0;
}

.sidebar-title,
.aside-title,
.aside-note-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--ink-soft);
  text-transform: uppercase;
}

.anchor-list,
.sidebar-links,
.aside-nav-list,
.aside-link-list,
.related-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.anchor-list a,
.sidebar-links a,
.aside-nav-list a,
.aside-link-list a,
.related-list a {
  display: block;
  padding: 7px 0 7px 10px;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
  border-left: 2px solid var(--line);
}

.anchor-list a:hover,
.sidebar-links a:hover,
.aside-nav-list a:hover,
.aside-link-list a:hover,
.related-list a:hover,
.anchor-list a:focus-visible,
.sidebar-links a:focus-visible,
.aside-nav-list a:focus-visible,
.aside-link-list a:focus-visible,
.related-list a:focus-visible {
  color: var(--accent);
  border-left-color: var(--accent);
  text-decoration: none;
}

.related-list li {
  display: flex;
  flex-direction: column;
  padding: 6px 0;
}

.related-list a {
  padding-left: 10px;
}

.related-note {
  padding-left: 12px;
  font-size: 12px;
  color: var(--ink-soft);
}

.sidebar-note p,
.aside-note p {
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ==========================================================================
   components · 图片与说明
   ========================================================================== */

.section-media,
.channel-figure,
.catalog-figure,
.content-figure,
.verify-figure,
.record-figure,
.term-figure,
.reading-figure,
.entry-example-media {
  margin: 0 0 22px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.section-media img,
.channel-figure img,
.catalog-figure img,
.content-figure img,
.verify-figure img,
.record-figure img,
.term-figure img,
.reading-figure img,
.entry-example-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  background-color: var(--paper);
}

.media-caption,
figcaption {
  padding: 9px 12px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

/* ==========================================================================
   pages · 首页
   ========================================================================== */

.focus-section {
  padding: 36px 0 40px;
  border-bottom: 1px solid var(--line);
}

.focus-grid {
  display: grid;
  grid-template-columns: 520px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

.focus-figure {
  position: relative;
  margin: 0;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

.focus-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background-color: var(--paper);
}

.code-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  padding: 3px 9px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--card);
  background-color: rgba(46, 38, 32, 0.82);
  border-radius: var(--radius);
  transition: opacity 150ms ease;
}

.focus-figure:hover .code-badge {
  opacity: 0.72;
}

.focus-caption {
  border-top: 1px solid var(--line);
}

.focus-text {
  min-width: 0;
  padding-top: 4px;
}

.section-eyebrow {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
  text-transform: uppercase;
}

.focus-text h1 {
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
  margin-bottom: 14px;
}

.focus-lead {
  max-width: 540px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.focus-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
}

.channel-section,
.catalog-section,
.routes-section,
.reading-section {
  padding: 40px 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  max-width: 780px;
  margin-bottom: 20px;
}

.section-head h2 {
  margin-bottom: 8px;
  font-size: 22px;
}

.section-desc {
  margin: 0;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.channel-table td:first-child {
  font-weight: 700;
}

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

.section-note {
  margin-top: 14px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.catalog-group {
  margin-top: 22px;
  padding-top: 18px;
  border-top: 1px dashed var(--line);
}

.catalog-group:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.group-title {
  margin-bottom: 10px;
  font-size: 18px;
}

.entry-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.entry-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 96px 88px 96px 104px;
  align-items: center;
  gap: 10px;
  padding: 11px 14px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.entry-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  min-width: 0;
}

.entry-field {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
}

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

.routes-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.route-card {
  display: flex;
  flex-direction: column;
  padding: 18px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.route-code {
  margin: 0 0 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.08em;
  color: var(--accent);
}

.route-card h3 {
  margin-bottom: 8px;
  font-size: 18px;
}

.route-for {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--confirm);
}

.route-body {
  flex: 1 1 auto;
  margin: 0 0 14px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.route-card .text-link {
  align-self: flex-start;
}

.reading-grid {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.reading-main {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.reading-item {
  padding: 16px 18px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.reading-item h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.reading-item p {
  margin: 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.reading-side {
  min-width: 0;
}

.reading-side-text {
  margin: 12px 0;
  font-size: 14px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.correction-strip {
  padding: 24px 0;
}

.correction-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 16px;
  padding: 14px 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.correction-text {
  flex: 1 1 320px;
  margin: 0;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* ==========================================================================
   pages · 题材频道
   ========================================================================== */

.dimension-table td:first-child {
  font-weight: 700;
}

.channel-card {
  margin-top: 22px;
  padding: 18px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.channel-card h3 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  margin-bottom: 8px;
  font-size: 18px;
}

.channel-code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--accent);
}

.channel-def {
  margin-bottom: 12px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.channel-enter {
  margin: 12px 0 0;
  font-size: 14px;
}

.advice-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.advice-card {
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.advice-scene {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.06em;
  color: var(--accent);
}

.advice-card h3 {
  margin-bottom: 6px;
  font-size: 16px;
}

.advice-direction,
.advice-reason {
  margin: 0 0 6px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.advice-link {
  margin: 0;
  font-size: 14px;
}

/* ==========================================================================
   pages · 专题片单
   ========================================================================== */

.catalog-body {
  padding-top: 8px;
}

.catalog-section > p {
  color: var(--ink-soft);
}

.task-group {
  margin-top: 20px;
}

.task-group-title {
  margin-bottom: 4px;
  font-size: 18px;
}

.task-group-desc {
  margin-bottom: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.catalog-body .entry-row {
  grid-template-columns: 84px 84px minmax(0, 1fr) 96px 92px;
}

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

.entry-genre,
.entry-struct,
.entry-rhythm {
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-soft);
}

.entry-link {
  font-size: 13px;
  white-space: nowrap;
  justify-self: end;
}

.entry-example {
  margin-top: 16px;
  padding: 18px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.entry-example-title {
  margin-bottom: 12px;
  font-size: 18px;
}

.entry-example-media {
  margin-bottom: 14px;
}

.entry-example-media img {
  aspect-ratio: 16 / 9;
}

.entry-field-table {
  margin-top: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.correction-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.correction-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 11px 14px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

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

.correction-desc {
  flex: 1 1 240px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.correction-link {
  font-size: 13px;
}

.catalog-aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 24px;
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

/* ==========================================================================
   pages · 观看准备
   ========================================================================== */

.preset-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.preset-card {
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.preset-card h3 {
  margin-bottom: 6px;
  font-size: 16px;
}

.preset-default {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.preset-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.next-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.next-card {
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.next-card h3 {
  margin-bottom: 6px;
  font-size: 16px;
}

.next-card p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.next-link {
  margin: 8px 0 0;
  font-size: 14px;
}

/* ==========================================================================
   pages · 入口核验
   ========================================================================== */

.verify-table td:first-child {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.conclusion-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.conclusion-card {
  padding: 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.conclusion-card.is-match {
  border-left: 3px solid var(--confirm);
}

.conclusion-card.is-mismatch {
  border-left: 3px solid var(--accent);
}

.conclusion-card h3 {
  margin-bottom: 8px;
  font-size: 16px;
}

.conclusion-examples {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.conclusion-examples li {
  padding-left: 14px;
  position: relative;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.conclusion-examples li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: var(--accent);
}

.content-aside .aside-block {
  margin-bottom: 16px;
}

/* ==========================================================================
   pages · 更正与反馈
   ========================================================================== */

.content-section > h3 {
  margin: 18px 0 8px;
  font-size: 16px;
}

.content-section .step-list {
  margin-top: 10px;
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.record-item {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 14px;
  padding: 11px 14px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.record-time {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
}

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

.record-desc {
  flex: 1 1 220px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--ink-soft);
}

.step-name {
  font-weight: 700;
}

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

/* ==========================================================================
   pages · 术语与编号
   ========================================================================== */

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

.term-item {
  padding: 14px 16px;
  background-color: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.term-name {
  margin: 0 0 6px;
  font-size: 17px;
  font-weight: 700;
}

.term-name::before {
  content: "§";
  margin-right: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 400;
  color: var(--accent);
}

.term-body {
  margin: 0 0 6px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.term-where {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

.term-figure img {
  aspect-ratio: 16 / 9;
}

.compare-table td:first-child {
  font-weight: 700;
}

.mapping-table td:first-child {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

/* ==========================================================================
   pages · 404
   ========================================================================== */

.error-main {
  padding: 56px 0 64px;
}

.error-inner {
  max-width: 720px;
}

.error-code {
  margin: 0 0 6px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.1em;
  color: var(--accent);
}

.error-main h1 {
  margin-bottom: 12px;
  font-size: clamp(28px, 4vw, 40px);
  line-height: 1.25;
}

.error-lead {
  max-width: 600px;
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 22px 0 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-size: 15px;
  border-radius: var(--radius);
  text-decoration: none;
  border: 1px solid transparent;
  transition: background-color 150ms ease, color 150ms ease, border-color 150ms ease;
}

.btn-primary {
  color: var(--card);
  background-color: var(--accent);
  border-color: var(--accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  color: var(--card);
  background-color: #7f3c25;
  border-color: #7f3c25;
  text-decoration: none;
}

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

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

.error-block {
  padding: 20px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.error-block h2 {
  margin-bottom: 10px;
  font-size: 18px;
}

.error-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.error-list a {
  font-size: 15px;
}

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

/* ==========================================================================
   components · 页脚
   ========================================================================== */

.site-footer {
  margin-top: 40px;
  padding: 40px 0 24px;
  background-color: var(--ink);
  color: #e8dfd2;
}

.footer-inner {
  display: block;
}

.footer-brand {
  padding-bottom: 22px;
  border-bottom: 1px solid rgba(232, 223, 210, 0.18);
}

.footer-name {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 19px;
  font-weight: 700;
  color: #f6f1e8;
}

.footer-tagline {
  margin: 0;
  max-width: 720px;
  font-size: 14px;
  line-height: 1.75;
  color: #c9bdad;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 28px;
  padding: 24px 0;
}

.footer-col-title {
  margin: 0 0 10px;
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: #c9bdad;
  text-transform: uppercase;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.footer-col a {
  display: inline-block;
  padding: 3px 0;
  font-size: 14px;
  color: #e8dfd2;
  text-decoration: none;
}

.footer-col a:hover,
.footer-col a:focus-visible {
  color: #f6f1e8;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer-rule {
  padding-top: 18px;
  border-top: 1px solid rgba(232, 223, 210, 0.18);
}

.footer-rule p {
  margin: 0 0 6px;
  font-size: 13px;
  line-height: 1.7;
  color: #b8ab9a;
}

.footer-copy {
  margin: 0;
  font-size: 12px;
  color: #9d9081;
}

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

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

  .entry-row {
    grid-template-columns: minmax(0, 1fr) 84px 80px 88px 92px;
  }
}

@media (max-width: 960px) {
  .site-nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .sidebar,
  .content-aside,
  .side-column,
  .page-aside {
    font-size: 15px;
  }

  .focus-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .focus-text {
    order: -1;
  }

  .focus-lead {
    max-width: none;
  }

  .routes-grid {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  .reading-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .entry-row,
  .catalog-body .entry-row {
    grid-template-columns: minmax(0, 1fr) 88px 84px;
    row-gap: 4px;
  }

  .entry-row .entry-link,
  .catalog-body .entry-link {
    justify-self: start;
    grid-column: 1 / -1;
  }

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

@media (max-width: 640px) {
  .site-body {
    font-size: 16px;
  }

  .header-inner {
    min-height: 60px;
    gap: 12px;
  }

  .brand-name {
    font-size: 17px;
  }

  .brand-code {
    display: none;
  }

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

  .focus-section {
    padding: 26px 0 30px;
  }

  .focus-text h1 {
    font-size: 26px;
  }

  .channel-section,
  .catalog-section,
  .routes-section,
  .reading-section {
    padding: 28px 0;
  }

  .section-head h2,
  .section > h2,
  .section-title,
  .content-section > h2 {
    font-size: 20px;
  }

  /* 表格改为字段堆叠 */
  .table-wrap {
    overflow-x: visible;
    border: 0;
    background-color: transparent;
  }

  .data-table,
  .data-table thead,
  .data-table tbody,
  .data-table tr,
  .data-table th,
  .data-table td,
  .dimension-table,
  .dimension-table thead,
  .dimension-table tbody,
  .dimension-table tr,
  .dimension-table th,
  .dimension-table td {
    display: block;
    width: 100%;
  }

  .data-table thead,
  .dimension-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
  }

  .data-table tbody tr,
  .dimension-table tbody tr {
    margin-bottom: 10px;
    padding: 10px 12px;
    background-color: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
  }

  .data-table td,
  .dimension-table td {
    padding: 4px 0;
    border-bottom: 0;
    font-size: 14px;
  }

  .data-table td:first-child,
  .dimension-table td:first-child {
    font-size: 15px;
    font-weight: 700;
  }

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

  .field-table,
  .rule-table,
  .entry-field-table,
  .compare-table,
  .mapping-table {
    font-size: 14px;
  }

  .field-table th,
  .field-table td,
  .rule-table th,
  .rule-table td,
  .entry-field-table th,
  .entry-field-table td,
  .compare-table th,
  .compare-table td,
  .mapping-table th,
  .mapping-table td {
    padding: 9px 10px;
  }

  .rule-table tbody th,
  .field-table tbody th,
  .entry-field-table tbody th,
  .compare-table tbody th,
  .mapping-table tbody th {
    width: 38%;
  }

  .entry-row,
  .catalog-body .entry-row {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 4px 10px;
    padding: 12px;
  }

  .entry-title {
    grid-column: 1 / -1;
  }

  .entry-field,
  .entry-field.code,
  .entry-code,
  .entry-genre,
  .entry-struct,
  .entry-rhythm {
    font-size: 13px;
  }

  .entry-row .entry-link,
  .catalog-body .entry-link {
    grid-column: 1 / -1;
    margin-top: 4px;
  }

  .routes-grid,
  .advice-grid,
  .preset-grid,
  .next-grid,
  .conclusion-grid,
  .check-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .step-item {
    padding: 12px 12px;
    gap: 10px;
  }

  .correction-row,
  .record-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .correction-text,
  .correction-desc,
  .record-desc {
    flex: 1 1 auto;
  }

  .footer-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .footer-col a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .error-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
  }
}

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

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