:root {
  --bg: #faf9f6;
  --ink: #1f2328;
  --ink-soft: #5a6169;
  --accent: #2f6f6b;
  --line: #d9d5cc;
  --card: #ffffff;
  --accent-soft: rgba(47, 111, 107, 0.08);
  --shell: 1120px;
  --radius: 6px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Menlo, Consolas, "Liberation Mono", monospace;
}

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

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--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(--accent);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  text-decoration: underline;
}

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

button {
  font: inherit;
  color: inherit;
  background: none;
  border: 0;
  cursor: pointer;
}

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

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: rgba(250, 249, 246, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(6px);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 14px 24px;
}

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

.home-main,
.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.site-footer {
  margin-top: auto;
  background: #f2f0ea;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.footer-inner {
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(3, minmax(150px, 1fr));
  gap: 32px;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

.footer-bottom {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px 24px 28px;
  border-top: 1px solid var(--line);
}

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

/* ============================================================
   components
   ============================================================ */

/* 顶部事实条 */
.fact-bar {
  background: var(--accent);
  color: #f4f7f6;
}

.fact-bar-text {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 8px 24px;
  font-size: 13px;
  line-height: 1.6;
}

/* 页头品牌与导航 */
.brand {
  display: inline-flex;
  align-items: baseline;
  gap: 10px;
  color: var(--ink);
  text-decoration: none;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
}

.brand-mark {
  font-size: 20px;
  font-weight: 600;
  color: var(--ink);
}

.brand-sub {
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0;
}

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li {
  display: block;
}

.nav-list a {
  display: inline-block;
  padding: 8px 12px;
  font-size: 15px;
  color: var(--ink);
  border-radius: var(--radius);
}

.nav-list a:hover,
.nav-list a:focus-visible {
  background: var(--accent-soft);
  text-decoration: none;
}

.nav-list a.is-current {
  color: var(--accent);
  font-weight: 600;
  background: var(--accent-soft);
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--card);
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink);
}

.nav-toggle-bar + .nav-toggle-bar {
  margin-top: 4px;
}

.nav-toggle-text {
  font-size: 14px;
}

/* 章节编号 */
.chapter-no,
.section-no,
.section-chapter,
.feature-card-no,
.reason-no,
.error-code {
  font-family: var(--font-mono);
  color: var(--accent);
}

.chapter-no {
  font-size: 13px;
  letter-spacing: 0.04em;
  margin-bottom: 8px;
}

.section-no,
.section-chapter {
  font-size: 13px;
  margin-bottom: 6px;
}

/* 区块头 */
.section-head {
  margin-bottom: 24px;
}

.section-title {
  font-size: 24px;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 760px;
}

.section-note,
.section-foot {
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-soft);
}

.section-note a,
.section-foot a {
  margin-right: 12px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 10px 20px;
  font-size: 15px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  text-decoration: none;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background: var(--accent);
  color: #f4f7f6;
  border-color: var(--accent);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: #275c59;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--accent-soft);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 20px 0 4px;
  font-size: 14px;
  color: var(--ink-soft);
}

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

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

/* 页面标题区 */
.page-header {
  padding: 12px 0 28px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-description {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 10px;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  margin-bottom: 12px;
}

.page-lead {
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 720px;
}

/* 页脚分组 */
.footer-brand {
  max-width: 320px;
}

.footer-logo {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
}

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

.footer-list li {
  margin-bottom: 8px;
}

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

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

/* FAQ */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 0 18px;
}

.faq-question {
  display: flex;
  align-items: center;
  min-height: 48px;
  padding: 12px 0;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::before {
  content: "＋";
  display: inline-block;
  width: 20px;
  margin-right: 8px;
  color: var(--accent);
  font-weight: 400;
}

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

.faq-answer {
  padding: 0 0 16px 28px;
  font-size: 15px;
  color: var(--ink-soft);
}

/* 通用字段列表 */
.field-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.field-row {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

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

.field-desc {
  font-size: 15px;
  color: var(--ink-soft);
}

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

.home-main {
  padding-top: 32px;
}

.home-hero {
  padding-bottom: 48px;
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 40px;
  align-items: center;
}

.hero-title {
  font-size: 34px;
  margin-bottom: 14px;
}

.hero-desc {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.hero-points {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}

.hero-point {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 15px;
}

.point-no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  min-width: 26px;
}

.point-text {
  color: var(--ink);
}

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

.hero-figure {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-figure img {
  width: 100%;
  height: 340px;
  object-fit: cover;
}

.hero-caption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

/* 题材方向总览 */
.home-topics {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.topic-columns {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.topic-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.topic-name {
  font-size: 18px;
  margin-bottom: 10px;
}

.topic-feature {
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 8px;
}

.topic-scope {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.topic-sample {
  font-size: 14px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
}

/* 今日推荐封面墙 */
.home-picks {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

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

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

.pick-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.pick-link:hover,
.pick-link:focus-visible {
  text-decoration: none;
}

.pick-link:hover .pick-name,
.pick-link:focus-visible .pick-name {
  color: var(--accent);
}

.pick-figure {
  overflow: hidden;
}

.pick-figure img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.pick-tall .pick-figure img {
  height: 280px;
}

.pick-body {
  padding: 14px 16px 16px;
}

.pick-name {
  font-size: 16px;
  margin-bottom: 6px;
}

.pick-topic {
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 4px;
}

.pick-status {
  font-size: 13px;
  color: var(--accent);
}

/* 更新日历 */
.home-updates {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.update-rows {
  border-top: 1px solid var(--line);
}

.update-row {
  display: grid;
  grid-template-columns: 110px minmax(0, 1.6fr) minmax(0, 1fr) 120px;
  gap: 16px;
  align-items: center;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.update-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.update-name {
  font-weight: 600;
}

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

.update-state {
  font-size: 13px;
  color: var(--accent);
}

/* 专题与说明摘要 */
.home-features {
  padding: 48px 0;
  border-top: 1px solid var(--line);
}

.feature-split {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 28px;
}

.feature-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 20px;
}

.feature-subtitle {
  font-size: 18px;
  margin-bottom: 14px;
}

.feature-cover {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 14px;
}

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

.feature-range,
.feature-note {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.feature-reason {
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 12px;
}

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

.feature-col-side .field-list {
  margin-bottom: 14px;
}

.feature-col-side .field-row {
  grid-template-columns: 110px minmax(0, 1fr);
  padding: 10px 0;
}

.field-term {
  font-weight: 600;
  font-size: 14px;
}

/* 站内栏目索引 */
.home-index {
  padding: 48px 0 8px;
  border-top: 1px solid var(--line);
}

.index-columns {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.index-col {
  display: block;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  color: inherit;
  text-decoration: none;
}

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

.index-no {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 8px;
}

.index-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 6px;
}

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

/* ============================================================
   pages · 内页通用骨架
   ============================================================ */

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

.page-layout {
  display: grid;
  gap: 40px;
  align-items: start;
}

.page-layout.layout-shell {
  grid-template-columns: minmax(0, 720px) minmax(0, 320px);
}

.sidebar-left .page-layout,
.page-layout.sidebar-left {
  grid-template-columns: minmax(0, 320px) minmax(0, 720px);
}

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

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

/* 侧栏区块 */
.aside-block {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  margin-bottom: 20px;
}

.aside-title {
  font-size: 15px;
  margin-bottom: 12px;
}

.aside-list li {
  margin-bottom: 8px;
}

.aside-list a {
  font-size: 14px;
}

.aside-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}

.aside-links a {
  font-size: 14px;
}

.aside-def-list dt {
  font-size: 14px;
  font-weight: 600;
  margin-top: 10px;
}

.aside-def-list dt:first-child {
  margin-top: 0;
}

.aside-def-list dd {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.65;
}

.aside-link-list li {
  margin-bottom: 8px;
}

.aside-link-list a {
  font-size: 14px;
}

/* 内页 section */
.section {
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

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

.guide-section {
  padding-bottom: 36px;
  margin-bottom: 36px;
  border-bottom: 1px solid var(--line);
}

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

/* ============================================================
   pages · 题材目录
   ============================================================ */

.direction-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.direction-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.direction-name {
  font-size: 18px;
  margin-bottom: 10px;
}

.direction-trait {
  font-size: 14px;
  color: var(--ink);
  margin-bottom: 14px;
}

.direction-fields {
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.direction-fields dt {
  font-size: 13px;
  color: var(--ink-soft);
  margin-top: 8px;
}

.direction-fields dt:first-child {
  margin-top: 0;
}

.direction-fields dd {
  font-size: 14px;
  color: var(--ink);
}

.entry-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.entry-group {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.entry-group-title {
  font-size: 17px;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.entry-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.entry-item {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
}

.entry-cover {
  width: 72px;
  height: 96px;
  object-fit: cover;
  border-radius: 4px;
}

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

.entry-name {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 4px;
}

.entry-meta,
.entry-note {
  font-size: 13px;
  color: var(--ink-soft);
}

.entry-tag,
.entry-status {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 4px;
  padding: 1px 8px;
  margin-right: 6px;
}

.field-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.field-column {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.field-column-title {
  font-size: 17px;
  margin-bottom: 14px;
}

.fact-list dt {
  font-size: 14px;
  font-weight: 600;
  margin-top: 12px;
}

.fact-list dt:first-child {
  margin-top: 0;
}

.fact-list dd {
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.7;
}

.compare-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

.compare-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 0;
  border-bottom: 1px solid var(--line);
}

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

.compare-head {
  background: #f2f0ea;
  font-weight: 600;
}

.compare-cell {
  padding: 12px 16px;
  font-size: 14px;
  color: var(--ink);
  border-right: 1px solid var(--line);
}

.compare-cell:last-child {
  border-right: 0;
}

.compare-head .compare-cell {
  font-size: 13px;
  color: var(--ink-soft);
}

/* ============================================================
   pages · 更新日历
   ============================================================ */

.update-records,
.update-fields,
.update-topic-map,
.update-faq {
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.update-faq {
  border-bottom: 0;
  margin-bottom: 0;
}

.record-group {
  margin-bottom: 24px;
}

.record-date {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--accent);
  padding-bottom: 8px;
  margin-bottom: 8px;
  border-bottom: 1px solid var(--line);
}

.record-list {
  border-top: 0;
}

.record-row {
  display: grid;
  grid-template-columns: 56px minmax(0, 1.6fr) minmax(0, 1fr) 110px;
  gap: 14px;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 15px;
}

.record-thumb {
  width: 56px;
  height: 72px;
  object-fit: cover;
  border-radius: 4px;
}

.record-name {
  font-weight: 600;
}

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

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

.record-state--new {
  color: var(--accent);
}

.record-state--update {
  color: #8a6d3b;
}

.record-state--field {
  color: var(--ink-soft);
}

.section-media {
  margin-bottom: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.section-media img {
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.section-media figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.topic-map {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.topic-map-col {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.topic-map-title {
  font-size: 17px;
  margin-bottom: 12px;
}

.topic-map-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 14px;
}

.topic-map-list li:last-child {
  border-bottom: 0;
}

/* ============================================================
   pages · 专题汇编
   ============================================================ */

.feature-cards,
.feature-reasons,
.feature-related,
.feature-relation {
  padding-bottom: 40px;
  margin-bottom: 40px;
  border-bottom: 1px solid var(--line);
}

.feature-relation {
  border-bottom: 0;
  margin-bottom: 0;
}

.feature-cards .section-title,
.feature-reasons .section-title,
.feature-related .section-title,
.feature-relation .section-title {
  font-size: 22px;
  margin-bottom: 8px;
}

.feature-cards .section-desc,
.feature-reasons .section-desc,
.feature-related .section-desc,
.feature-relation .section-desc {
  margin-bottom: 22px;
}

.feature-card-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

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

.feature-card-media img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.feature-card-body {
  padding: 18px 18px 20px;
}

.feature-card-no {
  font-size: 13px;
  margin-bottom: 6px;
}

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

.feature-card-range,
.feature-card-meta {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 8px;
}

.feature-card-link {
  display: inline-block;
  margin-top: 6px;
  font-size: 14px;
}

.reason-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.reason-item {
  display: grid;
  grid-template-columns: 64px minmax(0, 1fr);
  gap: 18px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line);
}

.reason-no {
  font-size: 26px;
  line-height: 1.2;
}

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

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

.reason-text {
  font-size: 15px;
  color: var(--ink-soft);
}

.related-groups {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.related-group {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

.related-group-title {
  font-size: 16px;
  margin-bottom: 12px;
}

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

.related-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-size: 14px;
  padding-bottom: 8px;
  border-bottom: 1px dashed var(--line);
}

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

.related-name {
  color: var(--ink);
}

.related-tag {
  color: var(--accent);
  font-size: 13px;
  white-space: nowrap;
}

.related-hint {
  margin-top: 14px;
  font-size: 13px;
}

.relation-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}

.relation-text p {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

.relation-aside {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
}

.relation-aside-title {
  font-size: 15px;
  margin-bottom: 12px;
}

.relation-links li {
  margin-bottom: 8px;
}

.relation-links a {
  font-size: 14px;
}

/* ============================================================
   pages · 阅读说明
   ============================================================ */

.guide-figure {
  margin-bottom: 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.guide-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.guide-figure figcaption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--ink-soft);
  border-top: 1px solid var(--line);
}

.field-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
}

.field-table .field-row {
  display: grid;
  grid-template-columns: 200px minmax(0, 1fr);
  gap: 0;
  padding: 0;
  border-bottom: 1px solid var(--line);
}

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

.field-table .field-name {
  padding: 12px 16px;
  font-size: 14px;
  border-right: 1px solid var(--line);
}

.field-table .field-desc {
  padding: 12px 16px;
  font-size: 14px;
}

.field-head {
  background: #f2f0ea;
}

.field-head .field-name,
.field-head .field-desc {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-soft);
}

.standard-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
}

.standard-item {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px;
}

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

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

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--line);
}

.boundary-item {
  padding: 12px 0 12px 22px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  color: var(--ink-soft);
  position: relative;
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 4px;
  top: 22px;
  width: 6px;
  height: 6px;
  background: var(--accent);
  border-radius: 50%;
}

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

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 64px 24px 80px;
}

.error-block {
  width: 100%;
  max-width: 640px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
}

.error-code {
  font-size: 40px;
  line-height: 1;
  margin-bottom: 12px;
}

.error-block h1 {
  font-size: 26px;
  margin-bottom: 12px;
}

.error-lead {
  font-size: 15px;
  color: var(--ink-soft);
  margin-bottom: 20px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
}

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

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

@media (max-width: 1024px) {
  .topic-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

  .page-layout.layout-shell,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .page-aside,
  .content-aside {
    order: 2;
  }

  .page-content,
  .content-main {
    order: 1;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 16px;
  }

  .site-nav {
    position: relative;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .nav-list {
    display: none;
    position: absolute;
    right: 0;
    top: calc(100% + 10px);
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    min-width: 200px;
    padding: 10px;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: 0 8px 24px rgba(31, 35, 40, 0.08);
  }

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

  .nav-list a {
    display: block;
    padding: 10px 12px;
    min-height: 44px;
  }

  .home-main,
  .inner-main {
    padding: 0 16px 48px;
  }

  .fact-bar-text {
    padding: 8px 16px;
  }

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

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

  .hero-figure img {
    height: 240px;
  }

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

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

  .pick-figure img,
  .pick-tall .pick-figure img {
    height: 180px;
  }

  .update-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
    padding: 14px 0;
  }

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

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

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

  .direction-grid,
  .entry-groups,
  .field-columns,
  .topic-map,
  .feature-card-grid,
  .related-groups,
  .standard-list,
  .relation-columns {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .compare-cell {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .compare-cell:last-child {
    border-bottom: 0;
  }

  .record-row {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 10px 12px;
  }

  .record-thumb {
    width: 48px;
    height: 62px;
    grid-row: span 3;
  }

  .record-name,
  .record-topic,
  .record-state {
    grid-column: 2;
  }

  .reason-item {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 14px;
  }

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

  .field-table .field-name {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .section-media img,
  .guide-figure img {
    height: 200px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding: 32px 16px 20px;
  }

  .footer-bottom {
    padding: 14px 16px 24px;
  }

  .error-main {
    padding: 40px 16px 56px;
  }
}

@media (max-width: 480px) {
  .pick-wall {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  .hero-actions .btn {
    width: 100%;
  }
}