:root {
  --color-bg: #ffffff;
  --color-ink: #1f2328;
  --color-muted: #5c6570;
  --color-accent: #c2410c;
  --color-accent-dark: #9a3412;
  --color-line: #e5e7eb;
  --color-line-soft: #eef0f2;
  --color-surface: #f5f6f7;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
  --shell-width: 1120px;
  --text-width: 760px;
  --gap-lg: 40px;
  --gap-md: 24px;
  --gap-sm: 14px;
  --radius: 6px;
}

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

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

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

body.site-body {
  margin: 0;
  padding: 0;
  background-color: var(--color-bg);
  color: var(--color-ink);
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  line-height: 1.75;
  text-rendering: optimizeLegibility;
}

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

p {
  margin: 0;
}

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

dl,
dd,
dt,
figure,
figcaption {
  margin: 0;
}

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

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

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

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

strong {
  font-weight: 600;
}

/* ============================================================
   layout — shell
   ============================================================ */

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

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

.brand {
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  line-height: 1.2;
}

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

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

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

.nav-list li {
  display: block;
}

.nav-list a {
  display: flex;
  align-items: center;
  padding: 8px 12px;
  min-height: 44px;
  font-size: 15px;
  color: var(--color-ink);
  text-decoration: none;
  border-radius: var(--radius);
}

.nav-list a:hover {
  color: var(--color-accent);
  background-color: var(--color-surface);
}

.nav-list a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 5px;
}

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  top: 15px;
  height: 2px;
  background-color: var(--color-ink);
  box-shadow: 0 6px 0 var(--color-ink), 0 12px 0 var(--color-ink);
}

.site-main {
  display: block;
}

.home-main {
  display: block;
}

.inner-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 24px 56px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px 0;
  font-size: 14px;
  color: var(--color-muted);
}

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

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

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

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

.page-header {
  padding: 8px 0 28px;
  border-bottom: 1px solid var(--color-line);
  margin-bottom: var(--gap-lg);
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-ink);
  max-width: var(--text-width);
}

.page-description {
  margin-top: 14px;
  max-width: var(--text-width);
  font-size: 16px;
  color: var(--color-muted);
}

.page-anchors {
  margin-top: 18px;
}

.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.anchor-list a {
  font-size: 14px;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px dashed var(--color-accent);
  padding-bottom: 2px;
}

.anchor-list a:hover {
  color: var(--color-accent-dark);
  border-bottom-style: solid;
}

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

.footer-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 40px 24px 28px;
  display: grid;
  grid-template-columns: minmax(220px, 1.4fr) repeat(3, minmax(140px, 1fr));
  gap: var(--gap-md) var(--gap-lg);
}

.footer-brand {
  padding-right: var(--gap-md);
}

.footer-name {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
}

.footer-text {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-muted);
  max-width: 300px;
}

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 10px;
}

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

.footer-list a {
  font-size: 14px;
  color: var(--color-muted);
  text-decoration: none;
}

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

.footer-copyright {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 24px 32px;
  font-size: 13px;
  color: var(--color-muted);
}

.footer-year {
  font-family: var(--font-mono);
}

/* ============================================================
   components — shared pieces
   ============================================================ */

.section-head {
  margin-bottom: var(--gap-md);
}

.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--color-ink);
}

.section-desc {
  margin-top: 8px;
  max-width: var(--text-width);
  font-size: 15px;
  color: var(--color-muted);
}

.section-intro {
  margin-top: 8px;
  max-width: var(--text-width);
  font-size: 15px;
  color: var(--color-muted);
}

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

.more-link {
  font-size: 15px;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 1px;
}

.more-link:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

.column-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--color-ink);
}

.column-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--color-muted);
}

.column-more {
  margin-top: 14px;
}

.step-link {
  display: inline-block;
  margin-top: 6px;
  font-size: 14px;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

.step-link:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

figure {
  overflow: hidden;
  border-radius: var(--radius);
  background-color: var(--color-surface);
}

figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

figcaption {
  padding: 8px 10px;
  font-size: 13px;
  color: var(--color-muted);
  background-color: var(--color-surface);
}

/* ============================================================
   pages — index
   ============================================================ */

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

.fact-bar-text {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 12px 24px;
  font-size: 14px;
  color: var(--color-muted);
}

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

.hero-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 44px 24px;
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--gap-lg);
  align-items: start;
}

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

.hero-title {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-ink);
}

.hero-lead {
  margin-top: 14px;
  font-size: 16px;
  color: var(--color-muted);
  max-width: 560px;
}

.hero-lead + .hero-lead {
  margin-top: 10px;
}

.hero-entries {
  margin-top: 24px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px 22px;
}

.entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 2px solid var(--color-accent);
}

.entry-link:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

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

.hero-media img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.topic-overview {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-bottom: 1px solid var(--color-line);
}

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

.topic-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px;
  background-color: var(--color-bg);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.topic-card:hover {
  border-color: var(--color-accent);
  background-color: var(--color-surface);
}

.topic-name {
  font-size: 18px;
  font-weight: 600;
}

.topic-scope {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-muted);
}

.topic-media {
  margin-top: 14px;
}

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

.topic-rep {
  margin-top: 12px;
  font-size: 13px;
  color: var(--color-muted);
}

.topic-link {
  margin-top: auto;
  padding-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  align-self: flex-start;
}

.topic-link:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

.update-section {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-bottom: 1px solid var(--color-line);
}

.update-batches {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
}

.batch-group {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px;
  background-color: var(--color-bg);
  transition: border-color 0.2s ease;
}

.batch-group:hover {
  border-color: var(--color-accent);
}

.batch-title {
  font-size: 16px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.batch-meta {
  margin-top: 6px;
  font-size: 13px;
  color: var(--color-muted);
}

.batch-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
}

.batch-row {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr) auto auto;
  gap: 10px;
  align-items: baseline;
  padding: 10px 0;
  border-top: 1px solid var(--color-line-soft);
  font-size: 14px;
}

.batch-item {
  color: var(--color-ink);
  font-weight: 600;
}

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

.batch-date,
.batch-progress {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
  white-space: nowrap;
}

.rank-field-section {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-bottom: 1px solid var(--color-line);
}

.rank-field-section > .section-title {
  margin-bottom: var(--gap-md);
}

.rank-field-layout {
  display: grid;
  grid-template-columns: 7fr 5fr;
  gap: var(--gap-lg);
  align-items: start;
}

.rank-column {
  min-width: 0;
}

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

.rank-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1.6fr) minmax(0, 1fr) auto;
  gap: 12px;
  align-items: baseline;
  padding: 11px 0;
  border-top: 1px solid var(--color-line-soft);
  font-size: 14px;
}

.rank-no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  font-weight: 600;
}

.rank-item {
  color: var(--color-ink);
  font-weight: 600;
}

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

.rank-period {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-muted);
  white-space: nowrap;
}

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

.field-summary {
  margin-top: 14px;
}

.field-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.field-text {
  margin: 4px 0 12px;
  font-size: 14px;
  color: var(--color-muted);
}

.field-text:last-of-type {
  margin-bottom: 0;
}

.path-section {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 48px 24px;
  border-bottom: 1px solid var(--color-line);
}

.path-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.path-step {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  background-color: var(--color-bg);
}

.path-step .step-no {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.path-step .step-title {
  font-size: 17px;
  font-weight: 600;
}

.path-step .step-text {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-muted);
}

.site-index {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 48px 24px;
}

.index-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: var(--gap-md);
}

.index-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: var(--gap-sm);
}

.index-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.index-item:hover {
  border-color: var(--color-accent);
  background-color: var(--color-surface);
}

.index-item a {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
}

.index-item a:hover {
  color: var(--color-accent);
  text-decoration: underline;
}

.index-desc {
  font-size: 13px;
  color: var(--color-muted);
}

/* ============================================================
   pages — inner shared sections
   ============================================================ */

.section {
  margin-bottom: var(--gap-lg);
}

.section > .section-title {
  margin-bottom: 8px;
}

/* 题材分类 */
.section-compare {
  margin-bottom: var(--gap-lg);
}

.compare-grid {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: var(--gap-md);
}

.compare-col {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px;
  background-color: var(--color-bg);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.compare-col:hover {
  border-color: var(--color-accent);
  background-color: var(--color-surface);
}

.compare-name {
  font-size: 17px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.compare-fields {
  margin-top: 12px;
}

.compare-fields dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-muted);
  margin-top: 10px;
}

.compare-fields dt:first-of-type {
  margin-top: 0;
}

.compare-fields dd {
  font-size: 14px;
  color: var(--color-ink);
  margin-top: 2px;
}

.section-detail {
  margin-bottom: var(--gap-lg);
}

.detail-group {
  margin-top: var(--gap-md);
  padding: 22px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  background-color: var(--color-bg);
}

.detail-name {
  font-size: 19px;
  font-weight: 600;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.detail-body {
  margin-top: 16px;
  display: grid;
  grid-template-columns: minmax(200px, 280px) minmax(0, 1fr);
  gap: var(--gap-md);
  align-items: start;
}

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

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

.detail-text {
  min-width: 0;
  font-size: 15px;
  color: var(--color-muted);
}

.field-brief {
  margin-top: 14px;
  padding: 14px 16px;
  background-color: var(--color-surface);
  border-radius: var(--radius);
}

.field-brief dt {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-ink);
  margin-top: 8px;
}

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

.field-brief dd {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 2px;
}

.detail-text > p + p {
  margin-top: 12px;
}

.section-advice {
  margin-bottom: var(--gap-lg);
}

.advice-grid {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
}

.advice-col {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  background-color: var(--color-bg);
}

.advice-title {
  font-size: 17px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.advice-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.advice-list li {
  font-size: 14px;
  color: var(--color-muted);
  padding-left: 16px;
  position: relative;
}

.advice-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.faq-list {
  margin-top: var(--gap-md);
  display: flex;
  flex-direction: column;
  gap: 10px;
}

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

.faq-item summary {
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  list-style: none;
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

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

.faq-item summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--color-accent);
  flex: 0 0 auto;
}

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

.faq-item p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--color-muted);
}

/* 最近更新 */
.batch-status {
  margin-bottom: var(--gap-lg);
}

.status-bar {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  background-color: var(--color-line);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.status-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 14px 16px;
  background-color: var(--color-surface);
  min-width: 0;
}

.status-key {
  font-size: 13px;
  color: var(--color-muted);
}

.status-value {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  overflow-wrap: anywhere;
}

.status-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-muted);
}

.batch-records {
  margin-bottom: var(--gap-lg);
}

.batch-records > .batch-group {
  margin-top: var(--gap-md);
  padding: 0;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.batch-records > .batch-group:hover {
  border-color: var(--color-accent);
}

.batch-group-head {
  padding: 16px 20px;
  background-color: var(--color-surface);
  border-bottom: 1px solid var(--color-line);
}

.batch-group-title {
  font-size: 17px;
  font-weight: 600;
  font-family: var(--font-mono);
}

.batch-group-meta {
  margin-top: 4px;
  font-size: 13px;
  color: var(--color-muted);
}

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

.record-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: var(--gap-md);
  padding: 16px 20px;
  border-top: 1px solid var(--color-line-soft);
  align-items: start;
}

.record-list .record-item:first-child {
  border-top: none;
}

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

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

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

.record-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
}

.record-field {
  margin-top: 6px;
  font-size: 14px;
  color: var(--color-muted);
}

.field-key {
  font-weight: 600;
  color: var(--color-ink);
}

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

.record-rule {
  margin-bottom: var(--gap-lg);
}

.rule-columns {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.rule-block {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  background-color: var(--color-bg);
}

.rule-block-title {
  font-size: 17px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.rule-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rule-list li {
  font-size: 14px;
  color: var(--color-muted);
  padding-left: 16px;
  position: relative;
}

.rule-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.rule-foot {
  margin-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.rule-foot a {
  font-size: 15px;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

.rule-foot a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

/* 人气位次 */
.rank-section {
  margin-bottom: var(--gap-lg);
}

.rank-section .section-head {
  margin-bottom: var(--gap-md);
}

.rank-section .section-head h2 {
  font-size: 22px;
  font-weight: 600;
}

.rank-figure {
  margin-bottom: var(--gap-md);
}

.rank-figure img.rank-cover {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.rank-section > .rank-list {
  margin-top: 0;
  border-top: 1px solid var(--color-line);
}

.rank-section .rank-item {
  display: grid;
  grid-template-columns: 56px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-line-soft);
  transition: background-color 0.2s ease;
}

.rank-section .rank-item:hover {
  background-color: var(--color-surface);
}

.rank-section .rank-item .rank-no {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  padding-top: 2px;
}

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

.rank-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
}

.rank-meta {
  margin-top: 4px;
  font-size: 14px;
  color: var(--color-muted);
}

.rank-figure-secondary {
  margin-top: var(--gap-md);
  margin-bottom: 0;
}

.rule-section {
  margin-bottom: var(--gap-lg);
}

.rule-section .section-head {
  margin-bottom: var(--gap-md);
}

.rule-section .section-head h2 {
  font-size: 22px;
  font-weight: 600;
}

.rule-section > .rule-block {
  margin-top: var(--gap-sm);
}

.rule-section > .rule-block h3 {
  font-size: 17px;
  font-weight: 600;
}

.rule-section > .rule-block p {
  margin-top: 8px;
  font-size: 15px;
  color: var(--color-muted);
}

.rule-boundary-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.rule-boundary-item {
  font-size: 14px;
  color: var(--color-muted);
  padding-left: 16px;
  position: relative;
}

.rule-boundary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

.advice-section {
  margin-bottom: var(--gap-lg);
}

.advice-section .section-head {
  margin-bottom: var(--gap-md);
}

.advice-section .section-head h2 {
  font-size: 22px;
  font-weight: 600;
}

.advice-section > .advice-list {
  margin-top: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.advice-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  background-color: var(--color-bg);
}

.advice-item h3 {
  font-size: 17px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.advice-item p {
  margin-top: 10px;
  font-size: 14px;
  color: var(--color-muted);
}

.advice-note {
  margin-top: 18px;
  font-size: 15px;
  color: var(--color-muted);
}

.advice-note a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

.advice-note a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

/* 条目字段说明 */
.page-layout {
  display: block;
}

.field-section {
  margin-bottom: var(--gap-lg);
}

.field-layout {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(240px, 320px);
  gap: var(--gap-lg);
  align-items: start;
}

.field-list {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: var(--gap-sm);
}

.field-block {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  background-color: var(--color-bg);
  transition: border-color 0.2s ease;
}

.field-block:hover {
  border-color: var(--color-accent);
}

.field-block .field-name {
  font-size: 17px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.field-detail {
  margin-top: 12px;
  display: grid;
  grid-template-columns: 92px minmax(0, 1fr);
  gap: 6px 14px;
}

.field-term {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
}

.field-desc {
  font-size: 14px;
  color: var(--color-ink);
  min-width: 0;
}

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

.entry-figure {
  min-width: 0;
}

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

.entry-caption {
  font-size: 13px;
  color: var(--color-muted);
}

.field-figure-note {
  margin-top: 12px;
  font-size: 14px;
  color: var(--color-muted);
}

.field-figure-links {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.field-figure-links a {
  font-size: 14px;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
  align-self: flex-start;
}

.field-figure-links a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

.combo-section {
  margin-bottom: var(--gap-lg);
}

.combo-list {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.combo-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  background-color: var(--color-bg);
}

.combo-title {
  font-size: 17px;
  font-weight: 600;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.combo-fields {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-accent);
  overflow-wrap: anywhere;
}

.combo-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--color-muted);
}

.combo-note {
  margin-top: 18px;
  font-size: 15px;
  color: var(--color-muted);
}

.combo-note a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

.combo-note a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

.misread-section {
  margin-bottom: var(--gap-lg);
}

.misread-table {
  margin-top: var(--gap-md);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
}

.misread-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 2fr);
  border-top: 1px solid var(--color-line-soft);
}

.misread-head {
  border-top: none;
  background-color: var(--color-surface);
}

.misread-cell {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--color-ink);
  min-width: 0;
}

.misread-cell + .misread-cell {
  border-left: 1px solid var(--color-line-soft);
}

.misread-head .misread-cell {
  font-weight: 600;
  color: var(--color-muted);
}

.misread-note {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 22px;
}

.misread-note a {
  font-size: 15px;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

.misread-note a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

/* 查阅指引 */
.guide-steps {
  margin-bottom: var(--gap-lg);
}

.guide-steps > h2,
.guide-organize > h2,
.guide-feedback > h2,
.guide-faq > h2 {
  font-size: 22px;
  font-weight: 600;
}

.step-list {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap-md);
}

.step-item {
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  background-color: var(--color-bg);
}

.step-item .step-number {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 8px;
}

.step-item .step-title {
  font-size: 17px;
  font-weight: 600;
}

.step-item .step-text {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-muted);
}

.step-item .step-text a {
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 1px solid var(--color-accent);
}

.step-item .step-text a:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

.guide-figure {
  margin-top: var(--gap-md);
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
}

.guide-organize {
  margin-bottom: var(--gap-lg);
}

.organize-list {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap-md);
}

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

.organize-item h3 {
  font-size: 16px;
  font-weight: 600;
}

.organize-item p {
  margin-top: 8px;
  font-size: 14px;
  color: var(--color-muted);
}

.guide-feedback {
  margin-bottom: var(--gap-lg);
}

.feedback-list {
  margin-top: var(--gap-md);
  display: grid;
  grid-template-columns: minmax(160px, 220px) minmax(0, 1fr);
  gap: 10px 20px;
  padding: 20px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
}

.feedback-list dt {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
}

.feedback-list dd {
  font-size: 14px;
  color: var(--color-muted);
  min-width: 0;
}

.feedback-note {
  margin-top: 14px;
  font-size: 14px;
  color: var(--color-muted);
}

.guide-faq {
  margin-bottom: var(--gap-lg);
}

.guide-faq .faq-list {
  margin-top: var(--gap-md);
}

/* 404 */
.error-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 64px 24px 80px;
}

.error-block {
  max-width: var(--text-width);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

.error-block h1 {
  margin-top: 10px;
  font-size: 32px;
  font-weight: 600;
}

.error-text {
  margin-top: 14px;
  font-size: 16px;
  color: var(--color-muted);
}

.error-links {
  margin-top: 24px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.error-links a {
  display: block;
  padding: 12px 16px;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  text-decoration: none;
  min-height: 44px;
}

.error-links a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent);
  background-color: var(--color-surface);
}

.error-action {
  margin-top: 24px;
}

.error-home {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: none;
  border-bottom: 2px solid var(--color-accent);
}

.error-home:hover {
  color: var(--color-accent-dark);
  border-bottom-color: var(--color-accent-dark);
}

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

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr 1fr;
    gap: var(--gap-md);
  }

  .rank-field-layout {
    grid-template-columns: 1fr 1fr;
    gap: var(--gap-md);
  }

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

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

  .rule-columns,
  .combo-list,
  .step-list,
  .advice-section > .advice-list,
  .path-steps {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .footer-inner {
    grid-template-columns: minmax(200px, 1fr) repeat(3, minmax(120px, 1fr));
    gap: var(--gap-md);
  }
}

@media (max-width: 768px) {
  .header-inner {
    padding: 12px 18px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    order: 3;
    flex: 1 1 100%;
    margin-left: 0;
    width: 100%;
  }

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

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

  .nav-list a {
    padding: 12px 8px;
    font-size: 16px;
  }

  .inner-main {
    padding: 0 18px 44px;
  }

  .page-header {
    padding: 4px 0 22px;
    margin-bottom: 28px;
  }

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

  .fact-bar-text {
    padding: 10px 18px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    padding: 32px 18px;
  }

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

  .topic-overview,
  .update-section,
  .rank-field-section,
  .path-section,
  .site-index {
    padding: 32px 18px;
  }

  .topic-grid,
  .compare-grid,
  .update-batches,
  .rank-field-layout,
  .path-steps,
  .advice-grid,
  .rule-columns,
  .combo-list,
  .step-list,
  .advice-section > .advice-list,
  .organize-list {
    grid-template-columns: 1fr;
  }

  .status-bar {
    grid-template-columns: 1fr;
  }

  .section-title,
  .index-title,
  .rank-section .section-head h2,
  .rule-section .section-head h2,
  .advice-section .section-head h2,
  .guide-steps > h2,
  .guide-organize > h2,
  .guide-feedback > h2,
  .guide-faq > h2 {
    font-size: 19px;
  }

  .detail-body {
    grid-template-columns: 1fr;
  }

  .detail-cover {
    max-width: 320px;
  }

  .record-item {
    grid-template-columns: 96px minmax(0, 1fr);
    gap: 14px;
    padding: 14px 16px;
  }

  .batch-row {
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 4px 10px;
  }

  .batch-topic {
    grid-column: 1 / -1;
    order: 3;
  }

  .rank-row {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .rank-row .rank-topic {
    grid-column: 2;
  }

  .rank-row .rank-period {
    grid-column: 2;
  }

  .rank-section .rank-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 10px;
  }

  .field-layout {
    grid-template-columns: 1fr;
    gap: var(--gap-md);
  }

  .field-figure {
    order: -1;
  }

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

  .misread-row {
    grid-template-columns: 1fr;
  }

  .misread-cell + .misread-cell {
    border-left: none;
    border-top: 1px solid var(--color-line-soft);
  }

  .feedback-list {
    grid-template-columns: 1fr;
    gap: 4px;
    padding: 16px;
  }

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

  .error-main {
    padding: 48px 18px 64px;
  }

  .error-block h1 {
    font-size: 24px;
  }

  .footer-inner {
    grid-template-columns: 1fr 1fr;
    padding: 32px 18px 24px;
    gap: var(--gap-md);
  }

  .footer-brand {
    grid-column: 1 / -1;
    padding-right: 0;
  }

  .footer-copyright {
    padding: 0 18px 28px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 10px 14px;
  }

  .brand {
    font-size: 18px;
  }

  .inner-main {
    padding: 0 14px 36px;
  }

  .fact-bar-text,
  .hero-inner,
  .topic-overview,
  .update-section,
  .rank-field-section,
  .path-section,
  .site-index {
    padding-left: 14px;
    padding-right: 14px;
  }

  .hero-title {
    font-size: 22px;
  }

  .page-title {
    font-size: 22px;
  }

  .hero-entries {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }

  .error-links {
    grid-template-columns: 1fr;
  }

  .footer-inner {
    grid-template-columns: 1fr;
    padding: 28px 14px 20px;
  }

  .footer-copyright {
    padding: 0 14px 24px;
  }

  .record-item {
    grid-template-columns: 1fr;
  }

  .record-cover {
    max-width: 240px;
  }

  .detail-group {
    padding: 16px;
  }

  .batch-group-head,
  .record-item {
    padding-left: 14px;
    padding-right: 14px;
  }

  .misread-cell {
    padding: 10px 12px;
  }

  .field-block,
  .combo-item,
  .step-item,
  .advice-item,
  .rule-block,
  .compare-col,
  .topic-card {
    padding: 16px;
  }
}