:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f5f6f7;
  --color-ink: #15181d;
  --color-body: #2a2f36;
  --color-muted: #5f6975;
  --color-line: #dfe3e8;
  --color-accent: #a63d2f;
  --color-accent-soft: #f7ece9;
  --color-pass: #2f6f4e;
  --color-warn: #8a5a12;
  --radius: 6px;
  --shadow-pop: 0 10px 24px rgba(21, 24, 29, 0.12);
  --font-base: "Noto Sans SC", "Source Han Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --container: 1160px;
  --container-narrow: 860px;
  --gutter: 24px;
}

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

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

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-body);
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.8;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

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

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--color-ink);
  font-weight: 600;
  line-height: 1.35;
}

p {
  margin: 0;
}

ul,
ol,
dl {
  margin: 0;
  padding: 0;
  list-style: none;
}

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

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: none;
  border: 0;
  padding: 0;
  cursor: pointer;
}

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

:lang(zh) {
  font-variant-numeric: tabular-nums;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: 16px;
  top: -60px;
  z-index: 60;
  padding: 10px 16px;
  background: var(--color-ink);
  color: #fff;
  border-radius: var(--radius);
  transition: top 0.16s ease;
}

.skip-link:focus {
  top: 12px;
  text-decoration: none;
}

/* ============ layout ============ */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--color-bg);
  color: var(--color-body);
  font-family: var(--font-base);
  font-size: 16px;
  line-height: 1.8;
}

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

.utility-bar {
  border-bottom: 1px solid var(--color-line);
  background: var(--color-bg-soft);
  font-size: 13px;
  line-height: 1.6;
}

.utility-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px var(--gutter);
}

.utility-status {
  margin: 0;
  color: var(--color-muted);
}

.utility-nav,
.utility-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 4px 20px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.utility-nav a,
.utility-links a {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  color: var(--color-body);
}

.utility-nav a:hover,
.utility-links a:hover {
  color: var(--color-accent);
}

.site-header {
  position: relative;
  z-index: 30;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 32px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 16px var(--gutter);
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-right: auto;
  min-width: 0;
}

.brand-mark {
  display: inline-block;
  color: var(--color-ink);
  font-size: 22px;
  font-weight: 600;
  line-height: 1.3;
  text-decoration: none;
}

.brand-mark:hover {
  color: var(--color-accent);
  text-decoration: none;
}

.brand-slogan {
  margin: 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.5;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

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

.primary-nav {
  display: block;
}

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

.nav-item a {
  display: inline-flex;
  align-items: center;
  min-height: 40px;
  padding: 0 12px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.4;
  border-left: 2px solid transparent;
  border-radius: 2px;
}

.nav-item a:hover {
  color: var(--color-accent);
  background: var(--color-bg-soft);
  text-decoration: none;
}

.nav-item.is-current a,
.nav-item a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  border-left-color: var(--color-accent);
}

.site-footer {
  flex-shrink: 0;
  margin-top: 56px;
  border-top: 1px solid var(--color-line);
  background: var(--color-bg-soft);
  color: var(--color-body);
}

.footer-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter) 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 32px;
}

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

.footer-mark {
  margin: 0 0 8px;
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}

.footer-desc {
  margin: 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}

.footer-title {
  margin: 0 0 12px;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 24px;
  color: var(--color-body);
  font-size: 14px;
}

.footer-list a:hover {
  color: var(--color-accent);
}

.footer-note {
  margin: 8px 0 0;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.7;
}

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 8px 24px;
  margin-top: 32px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line);
  font-size: 13px;
  color: var(--color-muted);
}

.footer-copy,
.footer-type {
  margin: 0;
}

/* ============ inner page shell ============ */
.site-inner {
  display: block;
}

.inner-main {
  display: block;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin: 0;
  padding: 20px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-muted);
}

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

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

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

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

.page-header {
  padding: 12px 0 0;
}

.page-title {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.25;
}

.page-title-block,
.page-head,
.page-hero {
  padding: 16px 0 0;
}

.page-lead {
  margin: 0;
  max-width: 760px;
  color: var(--color-body);
  font-size: 16px;
  line-height: 1.8;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 20px;
  margin: 12px 0 0;
  padding: 0;
  list-style: none;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.6;
}

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

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

.meta-item {
  position: relative;
  padding-left: 12px;
}

.meta-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.72em;
  width: 4px;
  height: 4px;
  background: var(--color-line);
  border-radius: 50%;
}

.page-container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
  max-width: var(--container);
  margin: 32px auto 0;
  padding: 0 var(--gutter);
}

.layout-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
  max-width: var(--container);
  margin: 32px auto 0;
  padding: 0 var(--gutter);
}

.layout-main,
.main-column,
.page-main,
.page-primary,
.content-main,
.layout-main-right > .layout-main {
  min-width: 0;
}

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

.content-section {
  margin: 0 0 40px;
}

.content-section:last-child {
  margin-bottom: 0;
}

.section-title {
  margin: 0 0 8px;
  color: var(--color-ink);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.35;
}

.section-intro,
.section-desc {
  margin: 0 0 16px;
  color: var(--color-body);
  font-size: 16px;
  line-height: 1.8;
}

.section-intro a,
.section-desc a {
  color: var(--color-accent);
}

.section-foot,
.section-tail {
  margin: 16px 0 0;
  font-size: 15px;
}

.section-foot a,
.section-tail a {
  margin-right: 16px;
}

.section-foot a:last-child,
.section-tail a:last-child {
  margin-right: 0;
}

/* ============ components ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  text-decoration: none;
  transition: background-color 0.16s ease, color 0.16s ease, border-color 0.16s ease;
}

.btn:hover {
  text-decoration: none;
}

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

.btn-primary:hover {
  background: #8f3327;
  border-color: #8f3327;
  color: #fff;
}

.btn-secondary {
  background: var(--color-bg);
  border-color: var(--color-line);
  color: var(--color-ink);
}

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

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

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

.data-table {
  width: 100%;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
  font-size: 14px;
  line-height: 1.65;
  text-align: left;
}

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

.data-table th,
.data-table td {
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}

.data-table thead th {
  background: var(--color-bg-soft);
  color: var(--color-ink);
  font-weight: 600;
  white-space: nowrap;
}

.data-table tbody tr:last-child th,
.data-table tbody tr:last-child td {
  border-bottom: 0;
}

.data-table tbody tr:hover {
  background: var(--color-bg-soft);
}

.data-table td a {
  color: var(--color-accent);
}

.table-wrap,
.table-scroll {
  width: 100%;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.table-wrap .data-table,
.table-scroll .data-table {
  min-width: 640px;
}

.table-caption {
  caption-side: top;
  padding: 0 0 8px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.6;
}

.status {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: var(--color-bg-soft);
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.6;
  white-space: nowrap;
}

.status-done,
.status-pass,
.status-check {
  border-color: #cfe0d5;
  background: #eef5f0;
  color: var(--color-pass);
}

.status-progress {
  border-color: #e6d3b6;
  background: #fbf3e6;
  color: var(--color-warn);
}

.status-pending,
.status-queued,
.status-review {
  border-color: #e9d3ce;
  background: var(--color-accent-soft);
  color: var(--color-accent);
}

.status-tag {
  display: inline-flex;
  align-items: center;
  padding: 1px 8px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: var(--color-bg-soft);
  color: var(--color-muted);
  font-size: 12px;
  line-height: 1.6;
  white-space: nowrap;
}

figure {
  margin: 0;
}

.content-figure,
.page-figure,
.section-media,
.hero-figure,
.topic-figure,
.topic-media {
  margin: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-bg-soft);
}

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

.content-figure figcaption,
.page-figure figcaption,
.section-media figcaption,
.hero-figure figcaption,
.figure-caption,
.media-caption {
  padding: 10px 14px;
  color: var(--color-muted);
  font-size: 13px;
  line-height: 1.65;
}

.content-figure {
  margin: 0 0 16px;
}

.page-figure {
  margin: 20px 0 0;
}

.split-columns,
.structure-columns,
.columns-two,
.relation-grid,
.boundary-columns,
.next-columns,
.role-columns,
.scope-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.split-col,
.structure-col,
.column-block,
.relation-col,
.boundary-col,
.next-col {
  min-width: 0;
  padding: 16px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.sub-title,
.boundary-subtitle,
.next-subtitle,
.relation-title,
.structure-heading {
  margin: 0 0 8px;
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.detail-list,
.limit-list,
.plain-list,
.relation-list,
.structure-list,
.note-list,
.rule-list,
.check-list,
.checklist,
.scope-list,
.overview-list,
.focus-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.detail-item,
.limit-item,
.rule-item,
.check-item,
.checklist-item,
.scope-item {
  min-width: 0;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

.plain-list li {
  position: relative;
  padding-left: 16px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

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

.detail-list .detail-item {
  position: relative;
  padding-left: 16px;
}

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

.detail-label {
  display: block;
  color: var(--color-ink);
  font-weight: 600;
}

.field-list {
  margin: 0;
}

.field-list dt {
  margin: 0;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

.field-list dd {
  margin: 2px 0 12px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

.field-list dd:last-child {
  margin-bottom: 0;
}

.link-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  font-size: 15px;
}

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

/* sidebar & aside cards */
.sidebar-card,
.aside-card {
  margin: 0 0 20px;
  padding: 18px 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.sidebar-card:last-child,
.aside-card:last-child {
  margin-bottom: 0;
}

.sidebar-title,
.aside-title {
  margin: 0 0 12px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.sidebar-list,
.aside-list,
.aside-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.sidebar-list a,
.aside-list a,
.aside-links a,
.aside-link {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.6;
}

.sidebar-list a:hover,
.aside-list a:hover,
.aside-links a:hover,
.aside-link:hover {
  color: var(--color-accent);
}

.sidebar-note .sidebar-title,
.aside-note .aside-title {
  font-size: 15px;
}

.sidebar-note p,
.aside-text {
  margin: 0 0 8px;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.75;
}

.sidebar-note p:last-child,
.aside-text:last-child {
  margin-bottom: 0;
}

/* FAQ */
.faq-section {
  margin-top: 8px;
}

.faq-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  margin-bottom: 10px;
  background: var(--color-bg);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-height: 44px;
  padding: 12px 16px;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  flex-shrink: 0;
  color: var(--color-accent);
  font-size: 18px;
  font-weight: 400;
  line-height: 1;
}

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

.faq-item p {
  margin: 0;
  padding: 0 16px 14px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.8;
}

/* ============ pages ============ */
/* home */
.home-main {
  display: block;
}

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

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 7fr) minmax(0, 5fr);
  gap: 40px;
  align-items: start;
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px var(--gutter);
}

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

.hero-eyebrow {
  margin: 0 0 10px;
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
}

.hero-text h1 {
  margin: 0 0 14px;
  color: var(--color-ink);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.25;
}

.hero-lead {
  margin: 0 0 20px;
  max-width: 620px;
  color: var(--color-body);
  font-size: 16px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 0 0 20px;
}

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

.hero-tags a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  border: 1px solid var(--color-line);
  border-radius: 4px;
  background: var(--color-bg-soft);
  color: var(--color-body);
  font-size: 13px;
  line-height: 1.5;
}

.hero-tags a:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  text-decoration: none;
}

.hero-aside {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
}

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

.hero-summary {
  padding: 16px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg-soft);
}

.summary-title {
  margin: 0 0 10px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.summary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.summary-list li {
  position: relative;
  padding-left: 14px;
  color: var(--color-body);
  font-size: 14px;
  line-height: 1.7;
}

.summary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

.summary-label {
  color: var(--color-ink);
  font-weight: 600;
}

.task-nav {
  padding: 14px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.task-nav-title {
  margin: 0 0 8px;
  color: var(--color-ink);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.5;
}

.task-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 4px 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.task-nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  font-size: 14px;
  color: var(--color-accent);
}

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

.section:last-of-type {
  border-bottom: 0;
}

.section-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.section-head {
  margin: 0 0 18px;
}

.section-head h2 {
  margin: 0 0 6px;
  color: var(--color-ink);
  font-size: 24px;
  font-weight: 600;
  line-height: 1.35;
}

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

.numbered-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: annual;
}

.annual-list .numbered-title {
  counter-increment: annual;
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.annual-list .numbered-title::before {
  content: counter(annual, decimal-leading-zero);
  display: inline-block;
  margin-right: 10px;
  color: var(--color-accent);
  font-size: 15px;
  font-weight: 600;
}

.annual-list li p {
  margin: 0;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.8;
}

.channel-table td:first-child {
  color: var(--color-ink);
  font-weight: 600;
  white-space: nowrap;
}

.topic-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.topic-item {
  display: grid;
  grid-template-columns: 220px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.topic-item .topic-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.topic-index {
  margin: 0 0 4px;
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
}

.topic-title {
  margin: 0 0 6px;
  color: var(--color-ink);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.5;
}

.topic-scope,
.topic-order {
  margin: 0 0 6px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

.topic-link {
  margin: 8px 0 0;
  font-size: 15px;
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.record-item {
  display: grid;
  grid-template-columns: 100px 120px minmax(0, 1fr) auto;
  gap: 12px;
  align-items: center;
  padding: 12px 16px;
  border-bottom: 1px solid var(--color-line);
  font-size: 14px;
  line-height: 1.65;
}

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

.record-batch {
  color: var(--color-ink);
  font-weight: 600;
  white-space: nowrap;
}

.record-type {
  color: var(--color-body);
}

.record-scope {
  color: var(--color-muted);
}

.boundary-columns {
  align-items: start;
}

.boundary-col .field-list {
  margin: 0;
}

.boundary-link {
  color: var(--color-accent);
  font-size: 15px;
}

.section-next {
  border-bottom: 0;
}

.next-columns {
  align-items: stretch;
}

.next-col {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.next-col p {
  margin: 0;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

.next-link {
  margin-top: auto;
  padding-top: 6px;
  color: var(--color-accent);
  font-size: 15px;
}

/* inner: annual overview */
.scope-list {
  gap: 14px;
}

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

.scope-name {
  display: block;
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.scope-desc {
  margin: 0;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

.scope-boundary {
  margin: 6px 0 0;
  color: var(--color-muted);
  font-size: 14px;
  line-height: 1.7;
}

.structure-columns {
  align-items: start;
}

.structure-link {
  margin: 12px 0 0;
  font-size: 15px;
}

.focus-list {
  counter-reset: focus;
  gap: 12px;
}

.focus-item {
  counter-increment: focus;
  position: relative;
  padding: 12px 16px 12px 48px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.focus-num {
  position: absolute;
  left: 14px;
  top: 12px;
  color: var(--color-accent);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

.focus-item .focus-num::before {
  content: counter(focus, decimal-leading-zero);
}

.focus-title {
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.focus-desc,
.focus-body {
  margin: 0;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

.focus-body {
  margin-top: 4px;
}

/* inner: channels */
.channel-table td:nth-child(1) {
  color: var(--color-ink);
  font-weight: 600;
  white-space: nowrap;
}

.field-table td:first-child {
  color: var(--color-ink);
  font-weight: 600;
  white-space: nowrap;
}

.check-list {
  gap: 12px;
}

.check-item {
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.check-title {
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

/* inner: topics */
.overview-list {
  gap: 8px;
}

.overview-list li {
  position: relative;
  padding-left: 16px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

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

.topic-entry {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  margin: 0 0 20px;
  padding: 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.topic-entry:last-child {
  margin-bottom: 0;
}

.topic-entry .topic-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

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

.topic-detail {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 6px 12px;
  margin: 10px 0 0;
  font-size: 14px;
  line-height: 1.7;
}

.topic-detail dt {
  color: var(--color-muted);
}

.topic-detail dd {
  margin: 0;
  color: var(--color-body);
}

.topic-links {
  margin: 12px 0 0;
  font-size: 15px;
}

.relation-grid {
  align-items: start;
}

.relation-list li {
  position: relative;
  padding-left: 16px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

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

/* inner: guide */
.checklist {
  counter-reset: checklist;
  gap: 12px;
}

.checklist-item {
  counter-increment: checklist;
  position: relative;
  padding: 12px 16px 12px 48px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.checklist-item::before {
  content: counter(checklist, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 12px;
  color: var(--color-accent);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

.checklist-title {
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

.rule-item {
  padding: 12px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg-soft);
}

.rule-title {
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

.split-title {
  margin: 0 0 8px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.limit-list li {
  position: relative;
  padding-left: 16px;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

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

/* inner: records */
.columns-two {
  align-items: start;
}

.page-records .content-figure {
  max-width: 760px;
  margin: 32px auto 0;
}

/* inner: data notes */
.layout-shell {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 40px;
  align-items: start;
  max-width: var(--container);
  margin: 32px auto 0;
  padding: 0 var(--gutter);
}

.page-hero-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 var(--gutter);
}

.rule-list {
  counter-reset: rules;
  gap: 12px;
}

.rule-list .rule-item {
  counter-increment: rules;
  position: relative;
  padding-left: 48px;
}

.rule-list .rule-item::before {
  content: counter(rules, decimal-leading-zero);
  position: absolute;
  left: 16px;
  top: 12px;
  color: var(--color-accent);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

.detail-item strong {
  display: block;
  margin-bottom: 2px;
  color: var(--color-ink);
  font-size: 15px;
}

/* inner: next steps */
.role-columns {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  align-items: start;
}

.role-card {
  padding: 16px 18px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
  min-width: 0;
}

.role-card h3 {
  margin: 0 0 8px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.role-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.role-list li {
  position: relative;
  padding-left: 14px;
  color: var(--color-body);
  font-size: 14px;
  line-height: 1.7;
}

.role-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 5px;
  height: 5px;
  background: var(--color-accent);
  border-radius: 50%;
}

.note-tail {
  margin: 14px 0 0;
  font-size: 15px;
}

.note-tail a {
  margin-right: 16px;
}

.note-tail a:last-child {
  margin-right: 0;
}

/* inner: feedback */
.scope-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
  align-items: stretch;
}

.scope-grid .scope-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.scope-grid .scope-item h3 {
  margin: 0;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.scope-grid .scope-item p {
  margin: 0;
  color: var(--color-body);
  font-size: 15px;
  line-height: 1.75;
}

.scope-judge {
  background: var(--color-bg-soft);
}

.scope-label {
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 600;
  line-height: 1.6;
}

.info-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: info;
}

.info-item {
  counter-increment: info;
  position: relative;
  padding: 12px 16px 12px 48px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.info-item::before {
  content: counter(info, decimal-leading-zero);
  position: absolute;
  left: 14px;
  top: 12px;
  color: var(--color-accent);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.6;
}

.info-item h3 {
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.boundary-item {
  padding: 14px 16px;
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-warn);
  border-radius: var(--radius);
  background: var(--color-bg);
}

.boundary-item h3 {
  margin: 0 0 4px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

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

/* 404 */
.error-main {
  display: block;
}

.error-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px var(--gutter) 40px;
}

.error-code {
  margin: 0 0 8px;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 600;
  line-height: 1.6;
}

.error-title {
  margin: 0 0 12px;
  color: var(--color-ink);
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 600;
  line-height: 1.25;
}

.error-desc {
  margin: 0 0 20px;
  color: var(--color-body);
  font-size: 16px;
  line-height: 1.8;
}

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

.error-hint {
  padding: 18px 20px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background: var(--color-bg-soft);
}

.error-hint-title {
  margin: 0 0 10px;
  color: var(--color-ink);
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
}

.error-hint-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.error-hint-list a {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  font-size: 15px;
}

/* ============ responsive ============ */
@media (max-width: 1080px) {
  .page-layout,
  .layout-inner,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr) 280px;
    gap: 32px;
  }

  .hero-inner {
    gap: 32px;
  }

  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 28px;
  }
}

@media (max-width: 860px) {
  .nav-toggle {
    display: inline-flex;
  }

  .primary-nav {
    flex-basis: 100%;
    width: 100%;
  }

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

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

  .nav-item a {
    width: 100%;
    min-height: 48px;
    padding: 0 12px;
    border-left: 3px solid transparent;
    border-radius: 0;
  }

  .nav-item.is-current a,
  .nav-item a.is-current {
    border-left-color: var(--color-accent);
    background: var(--color-accent-soft);
  }

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

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 28px var(--gutter);
  }

  .topic-item {
    grid-template-columns: 180px minmax(0, 1fr);
    gap: 16px;
  }

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

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

  .role-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

  .record-item {
    grid-template-columns: 90px 100px minmax(0, 1fr) auto;
    gap: 10px;
  }

  .page-title {
    font-size: clamp(26px, 5vw, 34px);
  }
}

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

  body,
  .site-body {
    font-size: 15px;
  }

  .utility-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .utility-nav,
  .utility-links {
    gap: 4px 14px;
  }

  .header-inner {
    padding: 12px var(--gutter);
    gap: 8px 16px;
  }

  .brand-mark {
    font-size: 20px;
  }

  .brand-slogan {
    font-size: 12px;
  }

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

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

  .hero-actions .btn {
    flex: 1 1 auto;
  }

  .section {
    padding: 28px 0;
  }

  .section-head h2 {
    font-size: 20px;
  }

  .section-title {
    font-size: 20px;
  }

  .topic-item {
    grid-template-columns: minmax(0, 1fr);
    padding: 14px;
  }

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

  .record-item {
    grid-template-columns: minmax(0, 1fr) auto;
    grid-template-areas:
      "batch status"
      "type type"
      "scope scope";
    gap: 4px 12px;
    padding: 12px 14px;
  }

  .record-batch {
    grid-area: batch;
  }

  .record-type {
    grid-area: type;
  }

  .record-scope {
    grid-area: scope;
  }

  .record-item .status {
    grid-area: status;
    justify-self: end;
  }

  .split-columns,
  .structure-columns,
  .columns-two,
  .relation-grid,
  .boundary-columns,
  .next-columns,
  .scope-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

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

  .topic-detail {
    grid-template-columns: 80px minmax(0, 1fr);
  }

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

  .footer-inner {
    padding: 28px var(--gutter) 20px;
  }

  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
    gap: 6px;
    margin-top: 24px;
  }

  .page-meta {
    gap: 4px 14px;
  }

  .data-table {
    font-size: 13px;
  }

  .data-table th,
  .data-table td {
    padding: 10px 12px;
  }

  .error-inner {
    padding: 40px var(--gutter) 32px;
  }

  .error-actions .btn {
    flex: 1 1 auto;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}

/* 程序验收反馈：修复网格孤项 */
@media (min-width: 769px) {
  .footer-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}