/* ==========================================================================
   喵趣漫画 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base 基础层：变量、重置、排版、骨架通用
   -------------------------------------------------------------------------- */
:root {
  --bg-page: #F4F1EC;
  --bg-card: #FFFFFF;
  --ink: #1F1D1A;
  --ink-sub: #6B665E;
  --line: #D9D3C9;
  --line-strong: #C3BAAE;
  --accent: #A8442A;
  --accent-soft: #F0E3DD;
  --radius: 6px;
  --radius-sm: 4px;
  --shell: 1200px;
  --sidebar-w: 236px;
  --gap: 28px;
  --mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

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

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--ink);
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 15px;
  line-height: 1.85;
  text-rendering: optimizeLegibility;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

p {
  margin: 0;
}

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

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

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

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

figure {
  margin: 0;
}

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

strong {
  font-weight: 700;
  color: var(--ink);
}

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

/* 通用容器：全站统一宽度与左右边距 */
.header-inner,
.footer-inner {
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
}

/* --------------------------------------------------------------------------
   2. layout 布局层：顶部事实条、页头、导航、两栏外壳、页脚
   -------------------------------------------------------------------------- */

/* 顶部事实条（仅首页） */
.top-fact-bar {
  background-color: var(--ink);
  color: #F0EDE7;
}

.top-fact-text {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 9px 24px;
  font-size: 13px;
  line-height: 1.6;
}

/* 页头骨架 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: var(--bg-page);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 72px;
  padding-top: 12px;
  padding-bottom: 12px;
}

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

.brand-name {
  font-size: 21px;
  font-weight: 700;
  line-height: 1.2;
  color: var(--ink);
}

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

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

/* 顶部主导航 */
.site-nav {
  min-width: 0;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 6px;
}

.nav-item > a {
  display: block;
  padding: 8px 12px;
  font-size: 14px;
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}

.nav-item > a:hover {
  background-color: var(--accent-soft);
}

.nav-item.is-current > a,
.nav-item > a.is-current {
  color: var(--accent);
  font-weight: 700;
  border-bottom-color: var(--accent);
}

/* 汉堡按钮：桌面隐藏 */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 11px 10px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
}

.nav-toggle-line {
  display: block;
  height: 2px;
  width: 100%;
  background-color: var(--ink);
  border-radius: 1px;
}

/* 两栏外壳：默认主内容在前、侧栏在后 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) var(--sidebar-w);
  gap: var(--gap);
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 32px 24px 56px;
  align-items: start;
}

/* 侧栏在左的变体：侧栏 DOM 位于 main 之前 */
.sidebar-left .page-layout,
.page-layout.sidebar-left {
  grid-template-columns: var(--sidebar-w) minmax(0, 1fr);
}

.sidebar-left .page-layout > .site-main,
.page-layout.sidebar-left > .site-main {
  grid-column: 2;
  grid-row: 1;
}

.sidebar-left .page-layout > .site-sidebar,
.sidebar-left .page-layout > .sidebar,
.page-layout.sidebar-left > .site-sidebar,
.page-layout.sidebar-left > .sidebar {
  grid-column: 1;
  grid-row: 1;
}

/* 主内容区骨架 */
.site-main {
  min-width: 0;
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink);
}

.home-main {
  display: flex;
  flex-direction: column;
  gap: 56px;
}

.inner-main {
  display: flex;
  flex-direction: column;
  gap: 44px;
}

/* 面包屑（内页统一） */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-sub);
}

.breadcrumb a {
  color: var(--ink-sub);
  border-bottom: 1px solid transparent;
}

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

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

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

/* 内页页面标题区：全站统一 */
.page-header {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--line);
}

.page-description {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-sub);
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.page-summary {
  max-width: 74ch;
  font-size: 15px;
  color: var(--ink-sub);
}

/* 页脚骨架 */
.site-footer {
  background-color: #ECE7DF;
  border-top: 1px solid var(--line);
  margin-top: 8px;
}

.footer-inner {
  padding-top: 44px;
  padding-bottom: 28px;
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding-bottom: 26px;
  border-bottom: 1px solid var(--line);
}

.footer-brand {
  font-size: 19px;
  font-weight: 700;
  color: var(--ink);
}

.footer-desc {
  max-width: 82ch;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-sub);
}

.footer-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  padding: 26px 0;
}

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

.footer-group-title {
  margin-bottom: 12px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-links a {
  display: inline-block;
  padding: 3px 0;
  font-size: 13px;
  color: var(--ink-sub);
  border-bottom: 1px solid transparent;
}

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

.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 8px 24px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.footer-note,
.footer-copy {
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-sub);
}

/* --------------------------------------------------------------------------
   3. components 组件层：侧栏导航、区块标题、卡片、清单、表格、步骤条
   -------------------------------------------------------------------------- */

/* --- 侧栏树状导航 --- */
.site-sidebar,
.sidebar {
  min-width: 0;
  font-size: 14px;
}

.sidebar-nav {
  position: sticky;
  top: 96px;
  padding: 18px 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sidebar-title,
.side-nav-title {
  margin-bottom: 12px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--ink-sub);
}

.sidebar-list,
.sidebar-tree,
.side-nav-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sidebar-item > a,
.sidebar-node > a,
.side-nav-item > a {
  display: block;
  padding: 9px 10px;
  font-size: 14px;
  line-height: 1.5;
  color: var(--ink);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.sidebar-item > a:hover,
.sidebar-node > a:hover,
.side-nav-item > a:hover {
  background-color: var(--accent-soft);
  color: var(--accent);
}

.sidebar-item.is-current > a,
.sidebar-node.is-current > a,
.side-nav-item.is-current > a,
.sidebar-item > a.is-current,
.sidebar-node > a.is-current,
.side-nav-item > a.is-current {
  color: var(--accent);
  font-weight: 700;
  border-left-color: var(--accent);
  background-color: #FAF6F3;
}

.sidebar-sub,
.sidebar-sublist,
.side-nav-sub {
  display: flex;
  flex-direction: column;
  gap: 1px;
  margin: 2px 0 6px 14px;
  padding-left: 8px;
  border-left: 1px dashed var(--line-strong);
}

.sidebar-sub a,
.sidebar-sublist a,
.side-nav-sub a {
  display: block;
  padding: 6px 8px;
  font-size: 13px;
  line-height: 1.5;
  color: var(--ink-sub);
  border-radius: var(--radius-sm);
}

.sidebar-sub a:hover,
.sidebar-sublist a:hover,
.side-nav-sub a:hover {
  color: var(--accent);
  background-color: var(--accent-soft);
}

/* --- 区块标题与说明 --- */
.section-title {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.45;
  color: var(--ink);
}

.section-intro,
.section-lead,
.section-desc {
  margin-top: 8px;
  max-width: 78ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.section-head {
  padding-bottom: 14px;
  margin-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.section-foot-link,
.column-foot-link,
.fields-entry-link,
.field-note-link,
.path-note,
.cross-foot,
.guide-foot {
  margin-top: 18px;
  font-size: 14px;
}

.section-foot-link a,
.column-foot-link a,
.fields-entry-link a,
.field-note-link a,
.path-note a,
.cross-foot a,
.guide-foot a {
  display: inline-block;
  padding: 4px 0;
  color: var(--accent);
  border-bottom: 1px solid var(--line-strong);
}

.section-foot-link a:hover,
.column-foot-link a:hover,
.fields-entry-link a:hover,
.field-note-link a:hover,
.path-note a:hover,
.cross-foot a:hover,
.guide-foot a:hover {
  border-bottom-color: var(--accent);
}

/* --- 封面卡（首页三列 / 题材页 / 更新页） --- */
.cover-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
  margin-top: 22px;
}

.cover-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 12px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.cover-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.cover-card img,
.cover-media img {
  width: 100%;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  background-color: #EFEBE4;
  border-radius: var(--radius-sm);
}

.cover-media {
  margin: 0;
}

.cover-name {
  font-size: 15px;
  font-weight: 700;
  line-height: 1.5;
  color: var(--ink);
}

.cover-tag {
  align-self: flex-start;
  padding: 1px 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: var(--radius-sm);
}

.cover-progress,
.cover-caption .cover-tag {
  font-size: 12px;
  color: var(--ink-sub);
}

.cover-caption {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.cover-caption .cover-name {
  font-size: 14px;
}

/* --- 题材方向容器（首页四栏 / 题材页四栏） --- */
.topic-columns,
.topic-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 22px;
}

.topic-column,
.topic-panel {
  display: flex;
  flex-direction: column;
  gap: 8px;
  min-width: 0;
  padding: 18px 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 2px solid var(--ink);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.topic-column:hover,
.topic-panel:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.topic-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.topic-scope {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-sub);
}

.topic-feature,
.topic-trait {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-sub);
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.topic-entries {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: auto;
  padding-top: 10px;
}

.topic-entries a {
  display: block;
  padding: 6px 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--ink);
  background-color: #FAF8F5;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.topic-entries a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --- 更新批次清单 --- */
.batch-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 22px;
}

.batch-group {
  padding: 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.batch-title,
.batch-no {
  display: block;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.02em;
  color: var(--accent);
}

.batch-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding-bottom: 10px;
  margin-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.batch-meta {
  font-size: 12px;
  color: var(--ink-sub);
}

.batch-entries,
.batch-list .batch-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.batch-entry,
.batch-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px 14px;
  padding: 9px 8px;
  font-size: 14px;
  border-bottom: 1px dashed var(--line);
  border-radius: var(--radius-sm);
}

.batch-entry:last-child,
.batch-row:last-child {
  border-bottom: 0;
}

.batch-entry:hover,
.batch-row:hover {
  background-color: #FAF8F5;
}

.entry-name,
.batch-name {
  flex: 1 1 200px;
  min-width: 0;
  font-weight: 700;
  color: var(--ink);
}

.entry-name:hover,
.batch-name:hover {
  color: var(--accent);
}

.entry-tag,
.batch-tag {
  flex: 0 0 auto;
  padding: 1px 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: var(--radius-sm);
}

.entry-progress,
.batch-progress {
  flex: 0 0 auto;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--ink-sub);
}

/* --- 位次清单与字段摘要（首页双栏） --- */
.ranking-fields-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 22px;
}

.ranking-column,
.fields-column {
  min-width: 0;
  padding: 20px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.column-title {
  padding-bottom: 10px;
  margin-bottom: 12px;
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.rank-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.rank-row {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 6px;
  border-bottom: 1px dashed var(--line);
}

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

.rank-index {
  flex: 0 0 30px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}

.rank-name {
  flex: 1 1 auto;
  min-width: 0;
  font-size: 14px;
  color: var(--ink);
}

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

.field-summary {
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  gap: 8px 14px;
  margin: 0;
}

.field-summary dt {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.field-summary dd {
  margin: 0;
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-sub);
}

/* --- 步骤条（首页 / 题材页 / 更新页 / 字段页 / 指引页 / 位次页） --- */
.path-steps,
.step-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 18px;
  margin-top: 22px;
  counter-reset: none;
}

.path-step,
.step-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 18px 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-index,
.step-no,
.step-number,
.path-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: #FFFFFF;
  background-color: var(--accent);
  border-radius: 50%;
}

.step-name,
.step-title,
.path-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.step-desc,
.step-text,
.path-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-sub);
}

.step-text a,
.path-text a,
.step-desc a {
  color: var(--accent);
  border-bottom: 1px solid var(--line-strong);
}

.step-text a:hover,
.path-text a:hover,
.step-desc a:hover {
  border-bottom-color: var(--accent);
}

/* --- 站内栏目索引（首页六列 / 指引页） --- */
.index-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.index-block {
  display: flex;
  flex-direction: column;
  gap: 6px;
  min-width: 0;
  padding: 16px 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.2s ease, transform 0.2s ease;
}

.index-block:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.index-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.index-desc {
  font-size: 12px;
  line-height: 1.75;
  color: var(--ink-sub);
}

.index-link {
  margin-top: auto;
  padding-top: 6px;
  font-size: 12px;
  color: var(--accent);
}

/* 指引页索引块整体为链接 */
.index-grid .index-block > a {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.index-grid .index-block > a:hover .index-name {
  color: var(--accent);
}

/* --------------------------------------------------------------------------
   4. pages 页面层：仅调整各页内部业务模块，不覆盖全局骨架
   -------------------------------------------------------------------------- */

/* --- 首页：首屏封面墙定位区 --- */
.hero-section {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 6fr);
  gap: 36px;
  align-items: start;
  padding-top: 8px;
}

.hero-text {
  display: flex;
  flex-direction: column;
  gap: 16px;
  min-width: 0;
  padding-top: 6px;
}

.hero-title {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.hero-lead {
  max-width: 62ch;
  font-size: 15px;
  line-height: 1.9;
  color: var(--ink-sub);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 4px;
}

.hero-action-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  background-color: var(--bg-card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.hero-action-link:hover {
  color: #FFFFFF;
  background-color: var(--accent);
  border-color: var(--accent);
}

.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 14px;
  min-width: 0;
}

.hero-figure {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hero-figure img {
  width: 100%;
  aspect-ratio: 16 / 10;
  height: auto;
  object-fit: cover;
  background-color: #EFEBE4;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero-caption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-sub);
}

.hero-cover-strip {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.hero-cover-card {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 10px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero-cover-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  background-color: #EFEBE4;
  border-radius: var(--radius-sm);
}

.hero-cover-name {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
}

/* 首页各区块统一节奏 */
.topics-overview,
.covers-preview,
.updates-record,
.ranking-fields,
.path-guide,
.site-index {
  min-width: 0;
}

/* --- 题材分类页 --- */
.topic-section,
.topic-covers,
.fields-entry,
.guide-steps {
  min-width: 0;
}

.fields-entry {
  padding: 22px 20px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

/* --- 最近更新页 --- */
.batch-section,
.batch-media,
.batch-field,
.batch-entry,
.path-section {
  min-width: 0;
}

.batch-media .cover-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.batch-field {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.field-note {
  padding: 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-note-title {
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.field-note-text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.entry-line {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  padding: 16px 18px;
  font-size: 14px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.entry-line a {
  color: var(--accent);
  border-bottom: 1px solid var(--line-strong);
}

.entry-line a:hover {
  border-bottom-color: var(--accent);
}

/* --- 人气位次页 --- */
.ranking-section,
.ranking-basis,
.ranking-topics {
  min-width: 0;
}

.ranking-media,
.basis-media {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 20px;
}

.ranking-media img,
.basis-media img {
  width: 100%;
  aspect-ratio: 21 / 9;
  height: auto;
  object-fit: cover;
  background-color: #EFEBE4;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.ranking-media figcaption,
.basis-media figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-sub);
}

.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-top: 22px;
  padding: 8px 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.ranking-row {
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) minmax(0, 260px);
  align-items: center;
  gap: 8px 16px;
  padding: 12px 4px;
  border-bottom: 1px dashed var(--line);
}

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

.ranking-row:hover {
  background-color: #FAF8F5;
}

.ranking-row .rank-index {
  flex: none;
  font-size: 14px;
}

.rank-body {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  min-width: 0;
}

.rank-body .rank-name {
  font-size: 15px;
  font-weight: 700;
}

.rank-tag {
  padding: 1px 8px;
  font-size: 12px;
  line-height: 1.7;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: var(--radius-sm);
}

.rank-note {
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-sub);
}

.basis-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin-top: 22px;
}

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

.basis-title {
  margin-bottom: 8px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.basis-text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.basis-points {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.basis-point {
  padding: 12px 14px;
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-sub);
  background-color: #FAF8F5;
  border-left: 2px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.topic-cross {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 22px;
}

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

.cross-title {
  padding-bottom: 8px;
  margin-bottom: 10px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

.cross-list {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.cross-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 9px 4px;
  font-size: 14px;
  border-bottom: 1px dashed var(--line);
}

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

.cross-index {
  font-family: var(--mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}

.cross-link {
  color: var(--ink);
}

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

.cross-text {
  font-size: 13px;
  color: var(--ink-sub);
}

/* --- 条目字段说明页 --- */
.field-table-section,
.field-sample-section,
.field-relation-section {
  min-width: 0;
}

.field-table {
  width: 100%;
  margin-top: 22px;
  border-collapse: collapse;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.field-table-caption {
  padding: 12px 14px;
  font-size: 13px;
  text-align: left;
  color: var(--ink-sub);
  background-color: #FAF8F5;
  border-bottom: 1px solid var(--line);
}

.field-table th,
.field-table td {
  padding: 12px 14px;
  font-size: 14px;
  line-height: 1.75;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}

.field-table thead th {
  font-size: 13px;
  font-weight: 700;
  color: var(--ink);
  background-color: #F7F4EF;
}

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

.field-table tbody tr:hover {
  background-color: #FAF8F5;
}

.field-name {
  font-weight: 700;
  color: var(--ink);
  white-space: nowrap;
}

.sample-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
  margin-top: 22px;
}

.sample-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 0;
  padding: 16px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.sample-figure {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.sample-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  background-color: #EFEBE4;
  border-radius: var(--radius-sm);
}

.sample-figure figcaption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-sub);
}

.sample-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.sample-text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.sample-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.sample-item {
  font-size: 13px;
  line-height: 1.75;
  color: var(--ink-sub);
}

.sample-key {
  font-weight: 700;
  color: var(--ink);
}

.relation-rows {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 22px;
}

.relation-row {
  padding: 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius);
}

.relation-row:hover {
  border-left-color: var(--accent);
}

.relation-title {
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.relation-text {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.relation-text a {
  color: var(--accent);
  border-bottom: 1px solid var(--line-strong);
}

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

/* --- 查阅指引页 --- */
.guide-banner {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.guide-banner img {
  width: 100%;
  aspect-ratio: 21 / 8;
  height: auto;
  object-fit: cover;
  background-color: #EFEBE4;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.guide-banner-caption {
  font-size: 12px;
  line-height: 1.7;
  color: var(--ink-sub);
}

.guide-boundary,
.guide-feedback {
  min-width: 0;
}

.boundary-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 16px;
  margin-top: 22px;
}

.boundary-item {
  min-width: 0;
  padding: 16px 16px 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: var(--radius);
}

.boundary-name {
  margin-bottom: 6px;
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.boundary-text {
  font-size: 13px;
  line-height: 1.8;
  color: var(--ink-sub);
}

.feedback-body {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 20px;
}

.feedback-text {
  max-width: 78ch;
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.feedback-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 18px;
}

.feedback-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--ink);
  background-color: var(--bg-card);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.feedback-link:hover {
  color: #FFFFFF;
  background-color: var(--accent);
  border-color: var(--accent);
}

/* 指引页步骤条使用独立作用域，避免与其他页步骤样式互相污染 */
.guide-steps .step-list {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.guide-steps .step-item {
  flex-direction: row;
  align-items: flex-start;
  gap: 12px;
}

.guide-steps .step-item .step-number {
  flex: 0 0 30px;
}

.step-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-width: 0;
}

/* --- 404 页 --- */
.error-main {
  display: flex;
  flex-direction: column;
  gap: 36px;
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.error-block {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 28px 24px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-top: 3px solid var(--accent);
  border-radius: var(--radius);
}

.error-code {
  font-family: var(--mono);
  font-size: 40px;
  font-weight: 700;
  line-height: 1;
  color: var(--accent);
}

.error-block h1 {
  font-size: 26px;
  line-height: 1.4;
}

.error-desc {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 14px;
  margin-top: 6px;
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 16px;
  font-size: 14px;
  color: var(--ink);
  background-color: #FAF8F5;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.error-home-link:hover {
  color: #FFFFFF;
  background-color: var(--accent);
  border-color: var(--accent);
}

.error-hint {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.error-hint h2 {
  font-size: 18px;
}

.error-hint p {
  font-size: 14px;
  line-height: 1.85;
  color: var(--ink-sub);
}

.error-hint-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}

.error-sub-link {
  display: block;
  padding: 10px 14px;
  font-size: 14px;
  color: var(--ink);
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.error-sub-link:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* --------------------------------------------------------------------------
   5. responsive 响应式：平板与手机
   -------------------------------------------------------------------------- */
@media (max-width: 1080px) {
  .index-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

@media (max-width: 900px) {
  /* 页头切换为汉堡菜单 */
  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    padding: 0 24px 16px;
    background-color: var(--bg-page);
    border-bottom: 1px solid var(--line);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 10px 0;
  }

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

  .nav-item > a {
    min-height: 44px;
    padding: 11px 12px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  }

  .nav-item.is-current > a,
  .nav-item > a.is-current {
    border-left-color: var(--accent);
    border-bottom-color: transparent;
  }

  .header-inner {
    position: relative;
    flex-wrap: nowrap;
    justify-content: space-between;
  }

  /* 两栏外壳改为单列：主内容在前 */
  .page-layout,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 24px 20px 48px;
  }

  .sidebar-left .page-layout > .site-main,
  .page-layout.sidebar-left > .site-main,
  .sidebar-left .page-layout > .site-sidebar,
  .sidebar-left .page-layout > .sidebar,
  .page-layout.sidebar-left > .site-sidebar,
  .page-layout.sidebar-left > .sidebar {
    grid-column: 1;
    grid-row: auto;
  }

  .sidebar-nav {
    position: static;
  }

  .hero-section {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

  .hero-title {
    font-size: 30px;
  }

  .ranking-fields-columns,
  .basis-columns,
  .sample-columns,
  .topic-cross {
    grid-template-columns: minmax(0, 1fr);
  }

  .ranking-row {
    grid-template-columns: 36px minmax(0, 1fr);
  }

  .rank-note {
    grid-column: 2;
  }

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

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

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

  .top-fact-text {
    padding: 8px 20px;
  }

  .header-inner {
    padding-left: 20px;
    padding-right: 20px;
    min-height: 64px;
  }

  .brand-name {
    font-size: 19px;
  }

  .site-nav {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-layout,
  .sidebar-left .page-layout,
  .page-layout.sidebar-left {
    padding: 20px 16px 40px;
  }

  .home-main,
  .inner-main {
    gap: 36px;
  }

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

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

  .section-title {
    font-size: 18px;
  }

  .cover-grid,
  .batch-media .cover-grid,
  .topic-columns,
  .topic-grid,
  .hero-cover-strip,
  .index-grid,
  .footer-groups,
  .basis-points,
  .boundary-list,
  .error-hint-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-actions,
  .feedback-links,
  .error-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-action-link,
  .feedback-link,
  .error-home-link {
    justify-content: center;
  }

  .ranking-row {
    grid-template-columns: 32px minmax(0, 1fr);
    padding: 10px 2px;
  }

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

  .field-summary dd {
    margin-bottom: 8px;
  }

  .field-table {
    display: block;
    overflow-x: auto;
    white-space: normal;
  }

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

  .field-name {
    white-space: normal;
  }

  .guide-steps .step-item {
    flex-direction: column;
    gap: 8px;
  }

  .footer-inner {
    padding-left: 20px;
    padding-right: 20px;
    padding-top: 32px;
  }

  .footer-bottom {
    flex-direction: column;
  }

  .error-main {
    padding: 32px 16px 48px;
  }

  .error-code {
    font-size: 32px;
  }
}

/* 滚动出现的轻量增强：初始可见，仅在支持时补充透明度过渡 */
@media (prefers-reduced-motion: no-preference) {
  .cover-card,
  .topic-column,
  .topic-panel,
  .index-block {
    will-change: transform;
  }
}