/* =========================================================
   蜜桃影像 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================= */

/* ---------- base ---------- */
:root {
  --paper: #f7f8fa;
  --ink: #1f2933;
  --ink-soft: #4b5a68;
  --ink-muted: #6b7a88;
  --link: #1b5fa7;
  --link-deep: #123f70;
  --catalog: #edf0f4;
  --rule: #cfd8e3;
  --rule-soft: #e2e8ef;
  --peach: #b5534b;
  --white: #ffffff;
  --radius: 6px;
  --wrap: 1120px;
  --read: 760px;
  --rail: 240px;
  --gap: 28px;
}

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

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

body.site-body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
}

img {
  max-width: 100%;
  height: auto;
  border: 0;
}

a {
  color: var(--link);
  text-decoration: underline;
  text-underline-offset: 2px;
}

a:hover,
a:focus-visible {
  color: var(--link-deep);
  text-decoration-thickness: 2px;
}

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

h1,
h2,
h3,
h4 {
  margin: 0 0 12px;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.35;
  letter-spacing: 0;
}

h2 {
  font-size: 22px;
}

h3 {
  font-size: 18px;
}

p {
  margin: 0 0 14px;
}

ul,
ol {
  margin: 0 0 14px;
  padding-left: 22px;
}

li {
  margin-bottom: 8px;
}

dl {
  margin: 0 0 14px;
}

dt {
  font-weight: 600;
  color: var(--ink);
}

dd {
  margin: 0 0 12px;
  color: var(--ink-soft);
}

figure {
  margin: 0;
}

figcaption {
  margin-top: 8px;
  color: var(--ink-muted);
  font-size: 13px;
  line-height: 1.6;
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  line-height: 1.6;
}

caption {
  caption-side: top;
  padding: 0 0 10px;
  color: var(--ink-muted);
  font-size: 13px;
  text-align: left;
}

th,
td {
  padding: 10px 12px;
  border: 1px solid var(--rule-soft);
  text-align: left;
  vertical-align: top;
}

thead th {
  background-color: var(--catalog);
  color: var(--ink);
  font-weight: 700;
  border-color: var(--rule);
}

tbody th {
  background-color: #fbfcfd;
  font-weight: 600;
  white-space: nowrap;
}

/* ---------- layout ---------- */
.site-header {
  background-color: var(--white);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  text-decoration: none;
  color: var(--ink);
  min-height: 44px;
  justify-content: center;
}

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

.brand-name {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.25;
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 10px;
  background-color: var(--white);
  border: 1px solid var(--rule);
  border-radius: var(--radius);
  cursor: pointer;
  flex-direction: column;
  justify-content: space-between;
  align-items: stretch;
}

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

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

.site-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 4px 18px;
}

.site-nav li {
  margin: 0;
}

.site-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink-soft);
  font-size: 15px;
  text-decoration: none;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--link);
  border-bottom-color: var(--link);
}

.site-nav a.is-current {
  color: var(--link-deep);
  font-weight: 700;
  border-bottom-color: var(--peach);
}

.site-main {
  display: block;
}

.home-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 28px 24px 48px;
}

.page-layout {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 24px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--rail);
  gap: var(--gap);
  align-items: start;
}

.inner-main {
  min-width: 0;
  max-width: var(--read);
}

.side-rail {
  min-width: 0;
  position: sticky;
  top: 16px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

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

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

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

.page-header {
  margin-bottom: 6px;
}

.page-title {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.page-kicker {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--peach);
  text-transform: none;
}

.page-summary {
  margin: 0 0 8px;
  font-size: 16px;
  color: var(--ink-soft);
}

.page-scope {
  margin: 0 0 20px;
  padding: 8px 12px;
  background-color: var(--catalog);
  border-left: 3px solid var(--peach);
  border-radius: 0 var(--radius) var(--radius) 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.site-footer {
  background-color: var(--white);
  border-top: 1px solid var(--rule);
  margin-top: 8px;
}

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

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

.footer-brand {
  margin: 0 0 8px;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
}

.footer-about p {
  color: var(--ink-soft);
  font-size: 14px;
}

.footer-copy {
  margin: 0;
  color: var(--ink-muted);
  font-size: 13px;
}

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

.footer-nav-title {
  margin: 0 0 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.footer-nav ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 2px 16px;
}

.footer-nav li {
  margin: 0;
}

.footer-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: var(--ink-soft);
  text-decoration: none;
}

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

/* ---------- components ---------- */
.table-scroll {
  overflow-x: auto;
  margin-bottom: 16px;
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  background-color: var(--white);
}

.table-scroll table {
  min-width: 560px;
}

.section-note {
  margin: 0 0 14px;
  font-size: 14px;
  color: var(--ink-muted);
}

.section-more {
  margin: 14px 0 0;
  font-size: 15px;
}

.section-intro {
  margin: 0 0 16px;
  color: var(--ink-soft);
}

.field-list {
  margin: 0 0 16px;
}

.field-list dt {
  padding-top: 8px;
  border-top: 1px solid var(--rule-soft);
}

.field-list dd {
  margin-bottom: 10px;
}

.record-timeline,
.record-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  border-left: 2px solid var(--rule);
}

.record-timeline li,
.record-item {
  position: relative;
  margin: 0 0 16px;
  padding: 0 0 0 20px;
}

.record-timeline li::before,
.record-item::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 7px;
  width: 10px;
  height: 10px;
  background-color: var(--peach);
  border: 2px solid var(--white);
  border-radius: 50%;
}

.record-timeline h3,
.record-item h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.record-timeline p,
.record-item p {
  margin: 0 0 6px;
  color: var(--ink-soft);
}

.rail-title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
}

.rail-block,
.channel-rail,
.related-links,
.page-toc,
.rail-links,
.check-card,
.feedback-card {
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  padding: 14px 16px;
}

.rail-block ul,
.channel-rail ul,
.related-links ul,
.page-toc ul,
.rail-links ul,
.check-card ul,
.feedback-card ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.rail-block li,
.channel-rail li,
.related-links li,
.page-toc li,
.rail-links li,
.check-card li,
.feedback-card li {
  margin: 0;
  border-bottom: 1px dashed var(--rule-soft);
}

.rail-block li:last-child,
.channel-rail li:last-child,
.related-links li:last-child,
.page-toc li:last-child,
.rail-links li:last-child,
.check-card li:last-child,
.feedback-card li:last-child {
  border-bottom: 0;
}

.rail-block a,
.channel-rail a,
.related-links a,
.page-toc a,
.rail-links a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
  color: var(--link);
  text-decoration: none;
}

.rail-block a:hover,
.channel-rail a:hover,
.related-links a:hover,
.page-toc a:hover,
.rail-links a:hover,
.rail-block a:focus-visible,
.channel-rail a:focus-visible,
.related-links a:focus-visible,
.page-toc a:focus-visible,
.rail-links a:focus-visible {
  color: var(--link-deep);
  text-decoration: underline;
}

.related-links-label {
  display: block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-muted);
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 16px;
}

.related-links .related-links-label {
  flex: 0 0 auto;
  margin: 0;
}

.related-links-item {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  font-size: 14px;
}

.rail-facts {
  margin: 0;
}

.rail-facts dt {
  font-size: 14px;
  color: var(--ink-muted);
  font-weight: 600;
}

.rail-facts dd {
  margin: 2px 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.rail-facts dd:last-child {
  margin-bottom: 0;
}

.compare-list {
  margin: 0 0 18px;
}

.compare-list dt {
  padding-top: 8px;
  border-top: 1px solid var(--rule-soft);
}

.compare-list dd {
  margin-bottom: 10px;
}

.boundary-list {
  margin: 0 0 16px;
  padding-left: 20px;
}

.boundary-list li {
  color: var(--ink-soft);
}

.route-list {
  margin: 0 0 16px;
  padding-left: 20px;
}

.route-list li {
  margin-bottom: 14px;
}

.route-list h3 {
  margin-bottom: 4px;
}

.route-list p {
  margin: 0;
  color: var(--ink-soft);
}

.special-lead {
  margin: 0 0 16px;
  padding: 14px 16px;
  background-color: var(--catalog);
  border-left: 3px solid var(--peach);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--ink-soft);
}

.special-lead p {
  margin: 0;
}

.special-items {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
  display: grid;
  gap: 12px;
}

.special-items li {
  margin: 0;
  padding: 12px 14px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.special-items h3 {
  margin-bottom: 4px;
  font-size: 17px;
}

.special-items p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.term-list {
  margin: 0 0 16px;
}

.term-list dt {
  padding-top: 8px;
  border-top: 1px solid var(--rule-soft);
}

.term-list dd {
  margin-bottom: 10px;
}

.check-list {
  margin: 0 0 16px;
  padding-left: 22px;
}

.check-list li {
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.scope-list,
.state-list {
  margin: 0 0 16px;
}

.scope-list dt,
.state-list dt {
  padding-top: 8px;
  border-top: 1px solid var(--rule-soft);
}

.scope-list dd,
.state-list dd {
  margin-bottom: 10px;
}

.scope-note {
  font-size: 14px;
  color: var(--ink-muted);
}

.info-list {
  margin: 0 0 16px;
  padding-left: 20px;
}

.info-list li {
  color: var(--ink-soft);
}

.info-list strong {
  color: var(--ink);
}

.card-note {
  margin: 10px 0 0;
  font-size: 13px;
  color: var(--ink-muted);
}

/* ---------- pages ---------- */
/* 首页 */
.hero-index {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 24px 32px;
  align-items: start;
  padding: 8px 0 24px;
  border-bottom: 1px solid var(--rule);
  margin-bottom: 24px;
}

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

.kicker {
  margin: 0 0 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--peach);
}

.hero-copy h1 {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.hero-lead {
  margin: 0 0 16px;
  font-size: 16px;
  color: var(--ink-soft);
}

.hero-cta {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background-color: var(--link);
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
}

.hero-cta:hover,
.hero-cta:focus-visible {
  background-color: var(--link-deep);
  color: var(--white);
  text-decoration: none;
}

.index-method {
  min-width: 0;
  padding: 14px 16px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.index-method-title {
  margin: 0 0 10px;
  font-size: 16px;
  font-weight: 700;
}

.index-method dl {
  margin: 0;
}

.index-method dt {
  font-size: 14px;
  color: var(--ink);
  padding-top: 8px;
  border-top: 1px solid var(--rule-soft);
}

.index-method dt:first-of-type {
  border-top: 0;
  padding-top: 0;
}

.index-method dd {
  margin: 2px 0 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.index-method dd:last-of-type {
  margin-bottom: 0;
}

.hero-figure {
  margin: 0 0 28px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.hero-figure figcaption {
  margin: 0;
  padding: 10px 16px 12px;
  border-top: 1px solid var(--rule-soft);
}

.entry-paths {
  margin-bottom: 32px;
}

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

.entry-path article {
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: 16px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.entry-num {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 13px;
  font-weight: 700;
  color: var(--peach);
}

.entry-path h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.entry-path p {
  margin: 0 0 12px;
  font-size: 15px;
  color: var(--ink-soft);
  flex: 1 1 auto;
}

.entry-path a {
  align-self: flex-start;
  font-size: 15px;
  font-weight: 600;
}

.channel-summary {
  margin-bottom: 32px;
}

.entry-sample {
  margin-bottom: 32px;
}

.entry-sample-body {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 20px 24px;
  align-items: start;
}

.field-figure {
  margin: 0;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.field-figure figcaption {
  margin: 0;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--rule-soft);
}

.entry-sample-body .field-list {
  min-width: 0;
  margin: 0;
}

.entry-sample-body .field-list dt {
  font-size: 15px;
}

.entry-sample-body .field-list dd {
  font-size: 15px;
}

.special-preview {
  margin-bottom: 32px;
}

.term-excerpt {
  margin-bottom: 32px;
}

.viewing-check {
  margin-bottom: 32px;
}

.maintenance-digest {
  margin-bottom: 32px;
}

.feedback-strip {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--peach);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.feedback-strip h2 {
  margin-bottom: 8px;
}

.feedback-strip p {
  color: var(--ink-soft);
}

.feedback-links {
  margin: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
}

.feedback-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-weight: 600;
}

/* 内页通用模块 */
.channel-table {
  margin-bottom: 20px;
}

.channel-figure {
  margin: 0 0 24px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.channel-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

.channel-figure figcaption {
  margin: 0;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--rule-soft);
}

.channel-compare {
  margin-bottom: 24px;
}

.channel-route {
  margin-bottom: 24px;
}

.channel-boundary {
  margin-bottom: 24px;
}

.special-item {
  margin-bottom: 20px;
  padding: 16px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.special-item h3 {
  margin-bottom: 6px;
}

.special-figure {
  margin: 0 0 14px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--rule-soft);
}

.special-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

.special-figure figcaption {
  margin: 0;
  padding: 8px 12px 10px;
  border-top: 1px solid var(--rule-soft);
}

.special-lead-text {
  color: var(--ink-soft);
}

.special-facts {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(90px, auto) minmax(0, 1fr);
  gap: 4px 14px;
}

.special-facts dt {
  font-size: 14px;
  color: var(--ink-muted);
  padding-top: 4px;
}

.special-facts dd {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.special-timeline {
  margin-bottom: 24px;
}

.key-facts {
  margin-bottom: 24px;
}

.field-diagram {
  margin: 0 0 24px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-diagram img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

.field-diagram figcaption {
  margin: 0;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--rule-soft);
}

.field-order,
.field-source,
.field-relation,
.sample-breakdown {
  margin-bottom: 24px;
}

.field-table {
  margin-bottom: 12px;
}

.sample-entry {
  padding: 16px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  margin-bottom: 12px;
}

.sample-title {
  margin-bottom: 10px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--rule-soft);
  font-size: 17px;
}

.sample-fields {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(90px, auto) minmax(0, 1fr);
  gap: 4px 14px;
}

.sample-fields dt {
  font-size: 14px;
  color: var(--ink-muted);
  padding-top: 4px;
}

.sample-fields dd {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.prep-summary {
  margin-bottom: 24px;
}

.prep-summary ol {
  list-style: none;
  margin: 0;
  padding: 0;
  counter-reset: prep;
}

.prep-summary li {
  position: relative;
  margin: 0 0 12px;
  padding: 12px 14px 12px 52px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.prep-summary .check-no {
  position: absolute;
  left: 14px;
  top: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  background-color: var(--catalog);
  border: 1px solid var(--rule);
  border-radius: 50%;
  font-size: 13px;
  font-weight: 700;
  color: var(--peach);
}

.prep-summary strong {
  display: block;
  margin-bottom: 2px;
  color: var(--ink);
}

.prep-summary p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.prep-figure {
  margin: 0 0 24px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.prep-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

.prep-figure figcaption {
  margin: 0;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--rule-soft);
}

.device-steps {
  margin-bottom: 24px;
}

.device-steps .step-item {
  margin-bottom: 14px;
  padding: 14px 16px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--link);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.device-steps .step-item h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.device-steps .step-item p {
  color: var(--ink-soft);
}

.device-steps .step-item ul {
  margin: 0;
  padding-left: 20px;
}

.device-steps .step-item li {
  color: var(--ink-soft);
  font-size: 15px;
}

.source-identity {
  margin-bottom: 24px;
}

.source-identity dl {
  margin: 0;
}

.source-identity dt {
  padding-top: 8px;
  border-top: 1px solid var(--rule-soft);
}

.source-identity dd {
  margin-bottom: 10px;
}

.problem-routing {
  margin-bottom: 24px;
}

.problem-routing > ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.problem-routing > ul > li {
  margin: 0;
  padding: 14px 16px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.problem-routing h3 {
  margin-bottom: 6px;
  font-size: 16px;
}

.problem-routing p {
  margin: 0 0 6px;
  font-size: 15px;
  color: var(--ink-soft);
}

.problem-routing p:last-child {
  margin-bottom: 0;
}

.faq {
  margin-bottom: 24px;
}

.faq details {
  margin-bottom: 10px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.faq summary {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 40px 10px 14px;
  position: relative;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq summary::after {
  content: "+";
  position: absolute;
  right: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  font-weight: 700;
  color: var(--link);
}

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

.faq details p {
  margin: 0;
  padding: 0 14px 14px;
  color: var(--ink-soft);
  font-size: 15px;
}

.check-card p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.check-card li {
  position: relative;
  padding: 8px 0 8px 26px;
  font-size: 14px;
  color: var(--ink-soft);
}

.check-card li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 12px;
  width: 12px;
  height: 12px;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background-color: var(--paper);
}

.term-diagram {
  margin: 0 0 24px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.term-diagram img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

.term-diagram figcaption {
  margin: 0;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--rule-soft);
}

.term-table-wrap {
  margin-bottom: 24px;
}

.term-table {
  margin-bottom: 0;
}

.confusable-pairs {
  margin-bottom: 24px;
}

.pair-item {
  margin-bottom: 14px;
  padding: 14px 16px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.pair-item h3 {
  margin-bottom: 8px;
  font-size: 16px;
}

.pair-list {
  margin: 0 0 10px;
  display: grid;
  grid-template-columns: minmax(80px, auto) minmax(0, 1fr);
  gap: 4px 14px;
}

.pair-list dt {
  font-size: 14px;
  color: var(--ink-muted);
  padding-top: 3px;
}

.pair-list dd {
  margin: 0 0 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.pair-item > p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.label-states,
.usage-rules {
  margin-bottom: 24px;
}

.usage-rules .rule-list {
  list-style: none;
  margin: 0 0 16px;
  padding: 0;
}

.usage-rules .rule-list li {
  margin: 0 0 12px;
  padding: 12px 14px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
}

.usage-rules .rule-list h3 {
  margin-bottom: 4px;
  font-size: 16px;
}

.usage-rules .rule-list p {
  margin: 0;
  font-size: 15px;
  color: var(--ink-soft);
}

.maintenance-scope {
  margin-bottom: 24px;
}

.maintenance-figure {
  margin: 0 0 24px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  overflow: hidden;
}

.maintenance-figure img {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 8;
  object-fit: cover;
}

.maintenance-figure figcaption {
  margin: 0;
  padding: 10px 14px 12px;
  border-top: 1px solid var(--rule-soft);
}

.record-type {
  margin: 0 0 4px;
  font-size: 13px;
  font-weight: 700;
  color: var(--peach);
}

.feedback-info {
  margin-bottom: 24px;
}

.writing-rules {
  margin-bottom: 24px;
}

.feedback-card p {
  margin: 0 0 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.feedback-card li {
  position: relative;
  padding: 8px 0 8px 22px;
  font-size: 14px;
  color: var(--ink-soft);
}

.feedback-card li::before {
  content: "·";
  position: absolute;
  left: 6px;
  top: 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--peach);
}

/* 404 */
.error-main {
  max-width: var(--read);
  margin: 0 auto;
  padding: 36px 24px 48px;
}

.error-title {
  padding-bottom: 18px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--rule);
}

.section-kicker {
  margin: 0 0 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--peach);
}

.error-title h1 {
  font-size: 32px;
  margin-bottom: 12px;
}

.error-paths {
  margin-bottom: 24px;
}

.error-path-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 16px;
}

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

.error-path-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-radius: var(--radius);
  font-size: 15px;
  text-decoration: none;
}

.error-path-list a:hover,
.error-path-list a:focus-visible {
  border-color: var(--link);
  text-decoration: underline;
}

.error-actions {
  padding: 18px 20px;
  background-color: var(--white);
  border: 1px solid var(--rule-soft);
  border-left: 3px solid var(--peach);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.error-actions p {
  color: var(--ink-soft);
}

.button-home {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background-color: var(--link);
  color: var(--white);
  font-weight: 600;
  text-decoration: none;
  border-radius: var(--radius);
}

.button-home:hover,
.button-home:focus-visible {
  background-color: var(--link-deep);
  color: var(--white);
  text-decoration: none;
}

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .header-inner {
    padding: 12px 20px;
    gap: 8px 16px;
  }

  .nav-toggle {
    display: flex;
  }

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

  .site-nav ul {
    display: none;
    flex-direction: column;
    gap: 0;
    border-top: 1px solid var(--rule-soft);
    padding-top: 6px;
  }

  .site-nav ul.is-open {
    display: flex;
  }

  .site-nav li {
    border-bottom: 1px solid var(--rule-soft);
  }

  .site-nav a {
    display: flex;
    width: 100%;
    min-height: 44px;
    border-bottom: 0;
  }

  .site-nav a.is-current {
    border-bottom: 0;
    background-color: var(--catalog);
  }

  .home-main,
  .page-layout,
  .footer-inner {
    padding-left: 20px;
    padding-right: 20px;
  }

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

  .inner-main {
    max-width: none;
  }

  .side-rail {
    position: static;
    top: auto;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    align-items: start;
  }

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

  .entry-path {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
  }

  .entry-sample-body {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

  .problem-routing > ul {
    grid-template-columns: minmax(0, 1fr);
  }
}

@media (max-width: 600px) {
  body.site-body {
    font-size: 15px;
  }

  .header-inner {
    padding: 12px 16px;
  }

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

  .home-main,
  .page-layout,
  .footer-inner,
  .error-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .home-main {
    padding-top: 20px;
    padding-bottom: 36px;
  }

  .page-layout {
    padding-top: 18px;
    padding-bottom: 36px;
  }

  .hero-copy h1,
  .page-title,
  .error-title h1 {
    font-size: 24px;
  }

  h2 {
    font-size: 20px;
  }

  h3 {
    font-size: 17px;
  }

  .hero-lead,
  .page-summary {
    font-size: 15px;
  }

  .hero-cta {
    width: 100%;
    justify-content: center;
  }

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

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

  .special-facts,
  .sample-fields,
  .pair-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .special-facts dt,
  .sample-fields dt,
  .pair-list dt {
    padding-top: 6px;
  }

  .special-facts dd,
  .sample-fields dd,
  .pair-list dd {
    margin-bottom: 6px;
  }

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

  .footer-nav ul {
    grid-template-columns: minmax(0, 1fr);
  }

  .error-path-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .feedback-links {
    flex-direction: column;
    gap: 0;
  }

  .feedback-links a {
    width: 100%;
  }
}