:root {
  --color-primary: #1f3a5f;
  --color-primary-soft: #2f4f78;
  --color-accent: #d97706;
  --color-accent-soft: #f0a94a;
  --color-bg: #f6f4f0;
  --color-surface: #ffffff;
  --color-surface-alt: #fbfaf7;
  --color-text: #2b2b2b;
  --color-text-soft: #5b5a56;
  --color-text-mute: #83817c;
  --color-line: #ddd8d0;
  --color-line-strong: #c8c1b6;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;
  --shadow-card: 0 1px 2px rgba(31, 58, 95, 0.06);
  --shadow-hover: 0 4px 14px rgba(31, 58, 95, 0.12);
  --font-heading: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Heiti SC", "WenQuanYi Micro Hei", sans-serif;
  --font-body: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Songti SC", "SimSun", serif;
  --container: 1200px;
  --gutter: 24px;
}

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

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

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

body {
  margin: 0;
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.35;
}

p {
  margin: 0;
}

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

dl,
dd {
  margin: 0;
}

dt {
  font-weight: 600;
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.18s ease, background-color 0.18s ease, border-color 0.18s ease;
}

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

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

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

figure {
  margin: 0;
}

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

caption {
  text-align: left;
}

button {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

summary {
  cursor: pointer;
}

.site-body {
  min-height: 100vh;
  background-color: var(--color-bg);
  font-family: var(--font-body);
  color: var(--color-text);
}

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

.site-header,
.site-main,
.site-footer {
  width: 100%;
}

.header-inner,
.topic-rail,
.site-main,
.footer-inner,
.footer-bottom {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding-left: var(--gutter);
  padding-right: var(--gutter);
}

.site-main {
  padding-top: 32px;
  padding-bottom: 48px;
}

.inner-main {
  padding-top: 24px;
  padding-bottom: 48px;
}

.fact-bar {
  background-color: var(--color-primary);
  color: #e8ecf2;
  font-size: 13px;
  line-height: 1.6;
}

.fact-bar p {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px var(--gutter);
}

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

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding-top: 16px;
  padding-bottom: 16px;
}

.site-nav {
  display: block;
}

/* ==========================================================================
   components — header / nav
   ========================================================================== */

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--color-primary);
}

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

.brand-name {
  font-family: var(--font-heading);
  font-size: 22px;
  font-weight: 600;
  letter-spacing: 0;
}

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

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 48px;
  height: 48px;
  padding: 0 12px;
  background-color: transparent;
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-md);
  cursor: pointer;
}

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

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

.nav-list li {
  display: flex;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 48px;
  padding: 0 14px;
  font-family: var(--font-heading);
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-alt);
}

.nav-link.is-current {
  color: var(--color-primary);
  font-weight: 600;
  box-shadow: inset 0 -2px 0 var(--color-accent);
}

.topic-rail {
  padding-top: 0;
  padding-bottom: 10px;
}

.topic-rail-list {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
  scrollbar-width: thin;
}

.topic-rail-list li {
  flex: 0 0 auto;
}

.topic-chip {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  padding: 0 12px;
  font-size: 13px;
  color: var(--color-text-soft);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  white-space: nowrap;
}

.topic-chip:hover {
  color: var(--color-primary);
  border-color: var(--color-primary-soft);
  background-color: #eef2f7;
}

/* components — breadcrumb / page header */

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-mute);
  margin-bottom: 16px;
}

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

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

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

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

.page-header {
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--color-line);
}

.page-title {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 12px;
}

.page-description {
  max-width: 880px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.page-description a {
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

.page-description a:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

.page-description strong {
  color: var(--color-primary);
  font-weight: 600;
}

.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 14px;
}

.page-meta-item {
  font-size: 13px;
  color: var(--color-text-soft);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 3px 10px;
}

/* components — generic section / module */

.section-title {
  font-size: 22px;
  line-height: 1.4;
  margin-bottom: 10px;
}

.section-note,
.section-intro,
.section-lead {
  max-width: 900px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-text-soft);
  margin-bottom: 20px;
}

.section-foot {
  margin-top: 16px;
  font-size: 14px;
  color: var(--color-text-soft);
}

.section-foot a {
  margin-right: 16px;
  border-bottom: 1px solid var(--color-line-strong);
}

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

.section-footnote {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed var(--color-line);
  font-size: 13px;
  color: var(--color-text-mute);
  line-height: 1.7;
}

.module-title {
  font-size: 18px;
  line-height: 1.4;
  margin-bottom: 6px;
}

.module-note {
  font-size: 13px;
  color: var(--color-text-mute);
  margin-bottom: 12px;
}

.module-more {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin-top: 14px;
  font-size: 14px;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

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

/* components — buttons */

.btn-primary,
.btn-plain {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  font-family: var(--font-heading);
  font-size: 15px;
  border-radius: var(--radius-md);
}

.btn-primary {
  color: #ffffff;
  background-color: var(--color-primary);
  border: 1px solid var(--color-primary);
}

.btn-primary:hover {
  color: #ffffff;
  background-color: var(--color-primary-soft);
  border-color: var(--color-primary-soft);
}

.btn-plain {
  color: var(--color-primary);
  background-color: transparent;
  border: 1px solid var(--color-line-strong);
}

.btn-plain:hover {
  color: var(--color-primary);
  border-color: var(--color-primary-soft);
  background-color: var(--color-surface-alt);
}

/* components — figures */

.hero-media,
.batch-figure,
.field-figure,
.aside-figure,
.media-figure {
  overflow: hidden;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  background-color: var(--color-surface);
}

.hero-media img,
.batch-figure img,
.field-figure img,
.aside-figure img,
.media-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-media figcaption,
.batch-figure-caption,
.field-figure figcaption,
.aside-figure figcaption,
.media-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-mute);
  border-top: 1px solid var(--color-line);
}

/* components — tables */

.field-table,
.rank-table,
.data-table {
  width: 100%;
  font-size: 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.field-table caption,
.rank-table caption,
.data-table caption {
  padding: 10px 14px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  background-color: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-line);
}

.field-table th,
.rank-table th,
.data-table th {
  padding: 10px 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  text-align: left;
  color: var(--color-primary);
  background-color: var(--color-surface-alt);
  border-bottom: 1px solid var(--color-line);
}

.field-table td,
.rank-table td,
.data-table td {
  padding: 10px 14px;
  color: var(--color-text-soft);
  border-bottom: 1px solid var(--color-line);
  vertical-align: top;
}

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

.field-table tbody tr:hover td,
.rank-table tbody tr:hover td,
.data-table tbody tr:hover td {
  background-color: #faf8f4;
}

/* components — steps */

.guide-steps,
.step-list {
  display: grid;
  gap: 14px;
}

.guide-step,
.step-item {
  position: relative;
  padding: 16px 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
}

.step-no,
.step-index {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 4px;
}

.guide-step .step-name,
.step-item .step-title {
  font-size: 17px;
  margin-bottom: 6px;
}

.step-desc,
.guide-step-text,
.step-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

/* components — aside / side panel */

.layout-aside,
.side-panel {
  font-size: 14px;
}

.aside-title,
.side-title {
  font-size: 16px;
  padding-bottom: 8px;
  margin-bottom: 12px;
  border-bottom: 2px solid var(--color-primary);
}

.aside-nav-list,
.side-list {
  display: grid;
  gap: 2px;
}

.aside-nav-link,
.side-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 6px 10px;
  color: var(--color-text-soft);
  border-radius: var(--radius-sm);
  line-height: 1.5;
}

.aside-nav-link:hover,
.side-list a:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-alt);
}

.aside-note,
.side-note {
  margin-top: 18px;
  padding: 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.aside-note-title,
.side-note-title {
  font-size: 14px;
  margin-bottom: 8px;
}

.aside-note-list {
  display: grid;
  gap: 4px;
  font-size: 13px;
  color: var(--color-text-soft);
}

.aside-note-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--color-text-soft);
}

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

.aside-fold {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface);
}

.aside-fold-summary {
  padding: 12px 14px;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
}

.aside-nav {
  padding: 0 10px 12px;
}

.aside-figure {
  margin-top: 18px;
}

.aside-figure img {
  aspect-ratio: 4 / 3;
}

/* components — footer */

.site-footer {
  margin-top: 40px;
  background-color: var(--color-primary);
  color: #d7dee8;
}

.footer-inner {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
  padding-top: 36px;
  padding-bottom: 28px;
}

.footer-title {
  font-size: 15px;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-list {
  display: grid;
  gap: 6px;
}

.footer-list a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: #c3cdda;
}

.footer-list a:hover {
  color: #f0a94a;
}

.footer-bottom {
  padding-top: 16px;
  padding-bottom: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  font-size: 13px;
  line-height: 1.7;
  color: #a9b5c5;
}

.footer-brand {
  color: #ffffff;
  font-family: var(--font-heading);
  margin-bottom: 6px;
}

.footer-note,
.footer-copy {
  margin-top: 4px;
}

/* ==========================================================================
   pages — home
   ========================================================================== */

.home-main {
  padding-top: 28px;
}

.hero-work {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--color-line);
}

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

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

.hero-lead {
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-text-soft);
  margin-bottom: 18px;
}

.hero-paths {
  display: grid;
  gap: 8px;
}

.hero-path a {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
}

.hero-path a:hover {
  border-left-color: var(--color-accent);
  box-shadow: var(--shadow-hover);
}

.path-name {
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
}

.path-desc {
  font-size: 13px;
  color: var(--color-text-mute);
  line-height: 1.6;
}

.hero-media img {
  aspect-ratio: 3 / 4;
}

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

.update-brief-list {
  display: grid;
  gap: 8px;
}

.update-brief {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--color-line);
}

.update-brief:last-child {
  border-bottom: 0;
  padding-bottom: 0;
}

.brief-name {
  font-size: 14px;
  color: var(--color-text);
}

.brief-meta {
  font-size: 12px;
  color: var(--color-text-mute);
}

.topic-overview,
.wall-update,
.rank-fields,
.topic-feature,
.read-guide,
.site-index {
  padding: 32px 0;
  border-bottom: 1px solid var(--color-line);
}

.topic-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

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

.topic-column:hover {
  box-shadow: var(--shadow-hover);
}

.topic-name {
  font-size: 17px;
  margin-bottom: 8px;
}

.topic-scope,
.topic-setting {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
  margin-bottom: 8px;
}

.topic-setting {
  color: var(--color-text-mute);
}

.topic-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

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

.wall-update-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 28px;
}

.wall-column,
.update-column,
.rank-column,
.fields-column {
  min-width: 0;
}

.column-title {
  font-size: 18px;
  margin-bottom: 6px;
}

.column-note {
  font-size: 13px;
  color: var(--color-text-mute);
  margin-bottom: 16px;
}

.cover-wall {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

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

.cover-card a {
  display: block;
  color: inherit;
}

.cover-card img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-alt);
}

.cover-card a:hover img {
  border-color: var(--color-primary-soft);
  box-shadow: var(--shadow-hover);
}

.cover-name {
  display: block;
  margin-top: 8px;
  font-family: var(--font-heading);
  font-size: 14px;
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.4;
}

.cover-meta {
  display: block;
  font-size: 12px;
  color: var(--color-text-mute);
  line-height: 1.5;
}

.update-day {
  margin-bottom: 16px;
}

.update-date {
  font-size: 14px;
  color: var(--color-primary);
  padding-bottom: 6px;
  margin-bottom: 6px;
  border-bottom: 1px solid var(--color-line);
}

.update-day-list {
  display: grid;
  gap: 2px;
}

.update-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--color-line);
}

.update-row:last-child {
  border-bottom: 0;
}

.update-row-name {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
}

.update-row-topic,
.row-dir {
  font-size: 12px;
  color: var(--color-text-mute);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 1px 8px;
}

.update-row-state,
.row-state {
  font-size: 12px;
  color: var(--color-accent);
}

.update-row .row-name {
  color: var(--color-text);
}

.rank-fields-columns {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 28px;
}

.rank-list {
  display: grid;
  gap: 2px;
}

.rank-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--color-line);
}

.rank-row:last-child {
  border-bottom: 0;
}

.rank-no {
  flex: 0 0 24px;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-accent);
  text-align: center;
}

.rank-name {
  flex: 1 1 auto;
  min-width: 0;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
}

.rank-dir {
  flex: 0 0 auto;
  font-size: 12px;
  color: var(--color-text-mute);
  background-color: var(--color-surface-alt);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  padding: 1px 8px;
}

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

.feature-card {
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-top: 3px solid var(--color-primary);
  border-radius: var(--radius-md);
  min-width: 0;
}

.feature-card:hover {
  box-shadow: var(--shadow-hover);
}

.feature-name {
  font-size: 17px;
  margin-bottom: 8px;
}

.feature-angle,
.feature-fit {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
  margin-bottom: 8px;
}

.feature-fit {
  color: var(--color-text-mute);
}

.feature-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

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

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

.guide-feedback {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.index-columns {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 12px;
}

.index-item {
  min-width: 0;
  padding: 14px 12px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.index-item a {
  display: block;
  font-family: var(--font-heading);
  font-size: 15px;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

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

.index-desc {
  display: block;
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-text-mute);
}

/* ==========================================================================
   pages — inner shared layout
   ========================================================================== */

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

.page-layout.sidebar-left {
  grid-template-columns: 260px minmax(0, 1fr);
}

.layout-aside,
.side-panel {
  min-width: 0;
}

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

.layout-shell .content-column {
  min-width: 0;
}

.layout-shell.sidebar-left {
  grid-template-columns: 260px minmax(0, 1fr);
}

/* pages — tema */

.tema-tree .tree-group {
  margin-bottom: 16px;
}

.tree-title {
  font-size: 14px;
  color: var(--color-primary);
  margin-bottom: 6px;
  padding-bottom: 4px;
  border-bottom: 1px solid var(--color-line);
}

.tree-list {
  display: grid;
  gap: 2px;
}

.tree-list > li > a {
  display: flex;
  align-items: center;
  min-height: 36px;
  padding: 4px 8px;
  font-size: 14px;
  color: var(--color-text-soft);
  border-radius: var(--radius-sm);
}

.tree-list > li > a:hover {
  color: var(--color-primary);
  background-color: var(--color-surface-alt);
}

.tree-sub {
  display: grid;
  gap: 2px;
  margin: 2px 0 6px 12px;
}

.tree-sub a {
  display: flex;
  align-items: center;
  min-height: 30px;
  font-size: 13px;
  color: var(--color-text-mute);
}

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

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

.direction-block:last-child {
  border-bottom: 0;
}

.direction-name {
  font-size: 20px;
  margin-bottom: 12px;
}

.direction-meta {
  display: grid;
  grid-template-columns: 88px minmax(0, 1fr);
  gap: 6px 14px;
  margin-bottom: 14px;
  font-size: 14px;
}

.direction-meta dt {
  color: var(--color-primary);
  font-family: var(--font-heading);
}

.direction-meta dd {
  color: var(--color-text-soft);
  line-height: 1.75;
}

.direction-entries {
  min-width: 0;
}

.entries-lead {
  font-size: 14px;
  color: var(--color-text-mute);
  margin-bottom: 8px;
}

.entry-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 8px;
}

.entry-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 8px 12px;
  font-size: 14px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
}

.entry-list a {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
}

.entry-tag {
  font-size: 12px;
  color: var(--color-text-mute);
}

.tema-figure {
  margin-top: 20px;
}

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

/* pages — gengxin */

.batch-status-card {
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-md);
  margin-bottom: 18px;
}

.batch-status-code {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 6px;
}

.batch-status-range,
.batch-status-topics,
.batch-status-state {
  font-size: 14px;
  color: var(--color-text-soft);
  line-height: 1.75;
}

.batch-status-state {
  color: var(--color-accent);
}

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

.update-group {
  margin-bottom: 22px;
}

.update-group-head {
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 2px solid var(--color-primary);
}

.update-group-date {
  font-size: 17px;
}

.update-group-note {
  font-size: 13px;
  color: var(--color-text-mute);
  margin-top: 4px;
}

.update-rows {
  display: grid;
  gap: 2px;
}

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

/* pages — bangdan */

.rank-table-wrap {
  overflow-x: auto;
}

.rank-table caption.rank-caption {
  font-size: 14px;
}

.rank-table .rank-no {
  width: 64px;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-accent);
}

.rank-table .rank-name {
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
}

.rank-table .rank-topic,
.rank-table .rank-note {
  font-size: 13px;
  color: var(--color-text-soft);
}

.caliber-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

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

.caliber-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.caliber-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.distribution-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

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

.distribution-name {
  font-size: 16px;
  margin-bottom: 8px;
}

.distribution-text {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
  margin-bottom: 10px;
}

.distribution-link {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--color-primary);
  border-bottom: 1px solid var(--color-line-strong);
}

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

/* pages — zhuanti */

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

.topic-card {
  display: flex;
  flex-direction: column;
  padding: 16px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  min-width: 0;
}

.topic-card:hover {
  box-shadow: var(--shadow-hover);
}

.topic-media {
  margin: -16px -16px 14px;
  border-bottom: 1px solid var(--color-line);
  overflow: hidden;
  border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.topic-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.topic-card .topic-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.topic-angle,
.topic-desc,
.topic-for,
.topic-count {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
  margin-bottom: 6px;
}

.topic-angle {
  color: var(--color-accent);
}

.topic-for {
  color: var(--color-text-mute);
}

.topic-count {
  margin-top: auto;
  font-size: 13px;
  color: var(--color-text-mute);
}

.topic-detail-section .media-figure {
  margin-bottom: 18px;
}

.topic-detail-section .media-figure img {
  aspect-ratio: 16 / 9;
}

.relation-block {
  padding: 16px 0;
  border-bottom: 1px dashed var(--color-line);
}

.relation-block:last-child {
  border-bottom: 0;
}

.relation-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.relation-block p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

/* pages — shuoming */

.field-figure {
  margin-bottom: 18px;
}

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

.boundary-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 14px;
}

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

.boundary-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.boundary-item p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

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

.step-item {
  padding-left: 22px;
}

.feedback-block {
  padding: 18px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.feedback-title {
  font-size: 17px;
  margin-bottom: 10px;
}

.feedback-list {
  display: grid;
  gap: 6px;
  margin-bottom: 12px;
}

.feedback-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: var(--color-text-soft);
}

.feedback-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.feedback-note {
  font-size: 13px;
  color: var(--color-text-mute);
  line-height: 1.7;
}

.faq-list {
  display: grid;
  gap: 8px;
}

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

.faq-question {
  padding: 14px 16px;
  font-family: var(--font-heading);
  font-weight: 600;
  color: var(--color-primary);
  line-height: 1.5;
}

.faq-item[open] .faq-question {
  border-bottom: 1px solid var(--color-line);
}

.faq-answer {
  padding: 12px 16px 16px;
  font-size: 14px;
  line-height: 1.8;
  color: var(--color-text-soft);
}

.continue-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.continue-list li {
  min-width: 0;
}

.continue-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--color-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.continue-list a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent-soft);
  box-shadow: var(--shadow-hover);
}

/* ==========================================================================
   pages — 404
   ========================================================================== */

.error-main {
  padding-top: 40px;
  padding-bottom: 56px;
}

.error-panel {
  padding: 32px;
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  margin-bottom: 28px;
}

.error-title {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-text {
  max-width: 720px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--color-text-soft);
  margin-bottom: 20px;
}

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

.error-guide {
  padding-top: 8px;
}

.error-link-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 10px;
}

.error-link-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--color-primary);
  background-color: var(--color-surface);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
}

.error-link-list a:hover {
  color: var(--color-accent);
  border-color: var(--color-accent-soft);
}

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

@media (max-width: 1024px) {
  .hero-work {
    grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  }

  .hero-updates {
    grid-column: 1 / -1;
  }

  .hero-media img {
    aspect-ratio: 4 / 3;
  }

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

  .wall-update-columns,
  .rank-fields-columns {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

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

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

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

@media (max-width: 720px) {
  :root {
    --gutter: 16px;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    flex-wrap: wrap;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    order: 3;
  }

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

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

  .nav-list li {
    display: block;
  }

  .nav-link {
    width: 100%;
    min-height: 48px;
    padding: 0 10px;
    font-size: 15px;
  }

  .nav-link.is-current {
    background-color: var(--color-surface-alt);
    box-shadow: inset 3px 0 0 var(--color-accent);
  }

  .site-main {
    padding-top: 20px;
    padding-bottom: 32px;
  }

  .inner-main {
    padding-top: 16px;
    padding-bottom: 32px;
  }

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

  .section-title {
    font-size: 19px;
  }

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

  .hero-updates {
    order: -1;
  }

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

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

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

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

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

  .read-guide .guide-steps,
  .section-order-guide .guide-steps,
  .step-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-layout.sidebar-left,
  .layout-shell.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

  .direction-meta dd {
    margin-bottom: 8px;
  }

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

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

  .caliber-list,
  .boundary-list,
  .entry-list,
  .continue-list,
  .error-link-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
    padding-top: 28px;
    padding-bottom: 20px;
  }

  .error-panel {
    padding: 22px 18px;
  }

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

@media (max-width: 420px) {
  .cover-wall {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .error-actions {
    flex-direction: column;
  }

  .btn-primary,
  .btn-plain {
    width: 100%;
  }
}