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

/* --------------------------------------------------------------------------
   base：变量、重置、排版基线
   -------------------------------------------------------------------------- */
:root {
  --c-bg: #f7f5f0;
  --c-surface: #ffffff;
  --c-text: #2b2b2b;
  --c-muted: #6b6b6b;
  --c-line: #e2ddd2;
  --c-note: #fdf6e3;
  --c-a: #2f6f8f;
  --c-b: #4a7c59;
  --c-c: #b07d3a;
  --c-d: #8a4b6b;
  --c-a-soft: #eaf1f5;
  --c-b-soft: #edf3ee;
  --c-c-soft: #f7f0e4;
  --c-d-soft: #f4ecf0;
  --wrap: 1120px;
  --read: 720px;
  --radius: 6px;
  --shadow: 0 1px 2px rgba(43, 43, 43, 0.06);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: ui-monospace, "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", monospace;
}

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

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

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

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

p {
  margin: 0;
}

ul,
ol,
dl,
dd,
figure {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

a {
  color: var(--c-a);
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
}

a:hover,
a:focus-visible {
  text-decoration-thickness: 2px;
}

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

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

time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

strong {
  font-weight: 600;
}

/* --------------------------------------------------------------------------
   layout：页面骨架（页头、主导航、主容器、面包屑、页标题区、页脚）
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--c-bg);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 12px 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--c-text);
}

.brand-mark {
  display: inline-block;
  padding: 4px 10px;
  border-radius: var(--radius);
  background: var(--c-a);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  white-space: nowrap;
}

.brand-slogan {
  font-size: 13px;
  color: var(--c-muted);
  line-height: 1.4;
}

.nav-toggle {
  display: none;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  margin-left: auto;
  padding: 8px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  color: var(--c-text);
  font-size: 14px;
}

.nav-toggle-icon {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--c-text);
  box-shadow: 0 -6px 0 var(--c-text), 0 6px 0 var(--c-text);
}

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

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

.nav-link {
  display: inline-block;
  padding: 8px 12px;
  border-radius: var(--radius);
  color: var(--c-text);
  font-size: 15px;
  text-decoration: none;
  white-space: nowrap;
}

.nav-link:hover {
  background: var(--c-a-soft);
  color: var(--c-a);
}

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

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

.inner-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px 20px 56px;
}

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

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

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

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

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

.page-header {
  max-width: var(--read);
  margin: 18px 0 8px;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--c-line);
}

.page-title {
  font-size: 34px;
  font-weight: 600;
  color: var(--c-text);
}

.page-description {
  margin-top: 12px;
  font-size: 16px;
  color: var(--c-muted);
}

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

.footer-inner {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2fr);
  gap: 24px 40px;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 32px 20px 20px;
}

.footer-name {
  font-size: 17px;
  font-weight: 600;
}

.footer-desc {
  margin-top: 8px;
  max-width: 340px;
  font-size: 14px;
  color: var(--c-muted);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px 24px;
}

.footer-group-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
}

.footer-list {
  margin-top: 10px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

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

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

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 20px 24px;
  border-top: 1px solid var(--c-line);
}

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

/* --------------------------------------------------------------------------
   components：通用组件（区块头、提示条、条目卡、列表行、步骤、索引）
   -------------------------------------------------------------------------- */
.section {
  margin-top: 44px;
}

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

.section-title {
  font-size: 22px;
  font-weight: 600;
}

.section-desc,
.section-lead,
.section-intro {
  margin-top: 8px;
  max-width: var(--read);
  font-size: 15px;
  color: var(--c-muted);
}

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

.section-text {
  margin-top: 10px;
  max-width: var(--read);
  color: var(--c-text);
}

.section-link-line {
  margin-top: 12px;
}

.inline-link {
  color: var(--c-a);
  font-weight: 600;
}

.notice-bar {
  margin-top: 14px;
  padding: 10px 14px;
  border-radius: var(--radius);
  background: var(--c-note);
  border-left: 3px solid var(--c-c);
  font-size: 14px;
  color: var(--c-muted);
}

.tip-bar {
  padding: 12px 16px;
  border-radius: var(--radius);
  background: var(--c-note);
  border-left: 3px solid var(--c-c);
}

.tip-text {
  font-size: 14px;
  color: var(--c-text);
}

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--c-a-soft);
  color: var(--c-a);
  font-size: 12px;
  line-height: 1.6;
}

/* 站内栏目索引 */
.section-index,
.site-index {
  margin-top: 44px;
  padding: 22px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.index-grid,
.site-index-list,
.index-list,
.sitemap-list {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 10px 14px;
  margin-top: 14px;
}

.index-link,
.site-index-link,
.sitemap-link {
  display: block;
  padding: 10px 12px;
  min-height: 44px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 14px;
  text-align: center;
  text-decoration: none;
}

.index-link:hover,
.site-index-link:hover,
.sitemap-link:hover {
  border-color: var(--c-a);
  color: var(--c-a);
}

/* 步骤条（首页开始使用） */
.step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.step-item {
  padding: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.step-num {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-c);
}

.step-title {
  margin-top: 6px;
  font-size: 17px;
}

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

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */
.fact-bar {
  background: var(--c-a);
}

.fact-bar-text {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 20px;
  color: #f2f7fa;
  font-size: 13px;
}

.home-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 20px 56px;
}

.hero {
  padding: 32px 0 8px;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 28px 36px;
  align-items: start;
}

.hero-title {
  font-size: 34px;
  font-weight: 600;
}

.hero-summary {
  margin-top: 14px;
  max-width: 560px;
  color: var(--c-muted);
}

.hero-paths {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
  margin-top: 22px;
}

.hero-path-item {
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-a);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.path-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-a);
}

.path-link {
  display: inline-block;
  margin-top: 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--c-text);
  text-decoration: none;
}

.path-link:hover {
  color: var(--c-a);
  text-decoration: underline;
}

.hero-media {
  margin: 0;
}

.hero-image {
  width: 100%;
  height: auto;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.hero-caption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-muted);
}

/* 题材方向总览 */
.genre-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.genre-card {
  padding: 16px;
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-a);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.genre-card.genre-a {
  border-left-color: var(--c-a);
}

.genre-card.genre-b {
  border-left-color: var(--c-b);
}

.genre-card.genre-c {
  border-left-color: var(--c-c);
}

.genre-card.genre-d {
  border-left-color: var(--c-d);
}

.genre-num {
  display: block;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--c-muted);
}

.genre-name {
  margin-top: 4px;
  font-size: 18px;
}

.genre-trait {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-muted);
}

.genre-rep {
  margin-top: 10px;
  font-size: 14px;
  color: var(--c-text);
}

.entry-link {
  color: var(--c-a);
  text-decoration: underline;
}

/* 封面墙 + 最近更新 */
.wall-updates-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 1fr);
  gap: 28px 32px;
  align-items: start;
}

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

.cover-card {
  padding: 10px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.cover-card:hover {
  border-left-color: var(--c-a);
}

.cover-media {
  margin: 0;
}

.cover-media img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: 4px;
  background: var(--c-bg);
}

.cover-name {
  margin-top: 10px;
  font-size: 15px;
}

.cover-tags {
  margin-top: 4px;
  font-size: 13px;
  color: var(--c-muted);
}

.updates-column {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

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

.update-list .update-row {
  display: grid;
  grid-template-columns: 84px minmax(0, 1fr) auto;
  grid-template-areas:
    "date name genre"
    "date status status";
  gap: 2px 10px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--c-line);
}

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

.update-list .update-date {
  grid-area: date;
  font-size: 13px;
  color: var(--c-muted);
}

.update-list .update-name {
  grid-area: name;
  font-size: 15px;
  font-weight: 600;
}

.update-list .update-genre {
  grid-area: genre;
  font-size: 13px;
  color: var(--c-a);
  white-space: nowrap;
}

.update-list .update-status {
  grid-area: status;
  font-size: 13px;
  color: var(--c-muted);
}

/* 编辑推荐位次 + 字段口径摘要 */
.picks-fields-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(280px, 1fr);
  gap: 28px 32px;
  align-items: start;
}

.pick-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  counter-reset: pick;
}

.pick-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) minmax(0, 1.1fr);
  gap: 8px 14px;
  align-items: baseline;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-c);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.pick-row:hover {
  border-left-color: var(--c-a);
}

.pick-rank {
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 600;
  color: var(--c-c);
}

.pick-name {
  font-size: 16px;
  font-weight: 600;
}

.pick-reason {
  font-size: 14px;
  color: var(--c-muted);
}

.fields-column {
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.field-summary {
  display: flex;
  flex-direction: column;
}

.field-row {
  display: grid;
  grid-template-columns: minmax(96px, 0.8fr) minmax(0, 1.6fr);
  gap: 6px 14px;
  padding: 10px 0;
  border-bottom: 1px dashed var(--c-line);
}

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

.field-name {
  font-size: 14px;
  font-weight: 600;
  color: var(--c-text);
}

.field-desc {
  font-size: 14px;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   pages：题材分类
   -------------------------------------------------------------------------- */
.genre-groups .section-title {
  margin-bottom: 6px;
}

.genre-block {
  margin-top: 26px;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-a);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.genre-block-01 {
  border-left-color: var(--c-a);
}

.genre-block-02 {
  border-left-color: var(--c-b);
}

.genre-block-03 {
  border-left-color: var(--c-c);
}

.genre-block-04 {
  border-left-color: var(--c-d);
}

.genre-block-head {
  max-width: var(--read);
}

.genre-no {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-muted);
}

.genre-block-head .genre-name {
  margin-top: 4px;
  font-size: 20px;
}

.genre-block-head .genre-trait {
  margin-top: 8px;
  font-size: 15px;
  color: var(--c-muted);
}

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

.genre-figure img {
  width: 100%;
  max-width: 420px;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
}

.genre-figure-caption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-muted);
}

.entry-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.entry-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 12px 14px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
}

.entry-title {
  font-size: 15px;
  font-weight: 600;
}

.entry-tag {
  font-size: 13px;
  color: var(--c-a);
}

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

.genre-bridge {
  margin-top: 36px;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

/* --------------------------------------------------------------------------
   pages：最近更新
   -------------------------------------------------------------------------- */
.section-update-list .section-title {
  margin-bottom: 6px;
}

.update-group {
  margin-top: 24px;
  padding: 18px 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.update-group .update-date {
  padding-bottom: 10px;
  border-bottom: 1px solid var(--c-line);
  font-size: 16px;
  font-weight: 600;
  color: var(--c-a);
}

.update-rows {
  display: flex;
  flex-direction: column;
}

.update-rows .update-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  align-items: start;
  padding: 14px 0;
  border-bottom: 1px dashed var(--c-line);
}

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

.update-thumb {
  margin: 0;
}

.update-thumb img {
  width: 96px;
  height: 128px;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: 4px;
  background: var(--c-bg);
}

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

.update-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
  text-decoration: none;
}

.update-title:hover {
  color: var(--c-a);
  text-decoration: underline;
}

.update-meta {
  margin-top: 6px;
  font-size: 14px;
  color: var(--c-muted);
}

.section-scope,
.section-bridge {
  margin-top: 36px;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.scope-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.scope-item {
  padding-left: 16px;
  border-left: 3px solid var(--c-b);
  font-size: 15px;
  color: var(--c-text);
}

.scope-term {
  margin-right: 6px;
}

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

.bridge-text {
  margin-top: 10px;
  max-width: var(--read);
  color: var(--c-text);
}

/* --------------------------------------------------------------------------
   pages：编辑推荐
   -------------------------------------------------------------------------- */
.picks-list-section .section-title,
.picks-basis-section .section-title,
.picks-bridge-section .section-title {
  margin-bottom: 6px;
}

.picks-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
  margin-top: 20px;
}

.pick-item {
  display: grid;
  grid-template-columns: 52px 120px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  border: 1px solid var(--c-line);
  border-left: 4px solid var(--c-c);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.pick-item:hover {
  border-left-color: var(--c-a);
}

.picks-list .pick-rank {
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 600;
  color: var(--c-c);
}

.pick-cover {
  margin: 0;
}

.pick-cover img {
  width: 120px;
  height: 160px;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: 4px;
  background: var(--c-bg);
}

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

.picks-list .pick-name {
  font-size: 18px;
}

.pick-genre {
  margin-top: 4px;
  font-size: 14px;
  color: var(--c-a);
}

.picks-list .pick-reason {
  margin-top: 8px;
  max-width: var(--read);
  font-size: 15px;
  color: var(--c-muted);
}

.picks-basis-section,
.picks-bridge-section {
  margin-top: 36px;
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.basis-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 18px;
  margin-top: 14px;
}

.basis-item {
  padding-left: 16px;
  border-left: 3px solid var(--c-c);
  font-size: 15px;
  color: var(--c-text);
}

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

/* --------------------------------------------------------------------------
   pages：条目字段说明
   -------------------------------------------------------------------------- */
.field-figure-section .section-title,
.field-spec-section .section-title,
.field-boundary-section .section-title,
.field-mapping-section .section-title {
  margin-bottom: 8px;
}

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

.field-figure img {
  width: 100%;
  max-width: 720px;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.field-figure-caption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-muted);
}

.field-spec-list {
  margin-top: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.field-spec-item {
  display: grid;
  grid-template-columns: minmax(140px, 0.5fr) minmax(0, 2fr);
  gap: 8px 20px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--c-line);
}

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

.field-spec-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--c-text);
}

.field-spec-body {
  min-width: 0;
}

.field-spec-meaning {
  font-size: 15px;
  color: var(--c-text);
}

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

.field-boundary-section,
.field-mapping-section {
  margin-top: 36px;
}

.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 14px;
}

.boundary-item {
  padding-left: 16px;
  border-left: 3px solid var(--c-d);
  font-size: 15px;
  color: var(--c-text);
}

.mapping-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.mapping-card {
  padding: 16px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-a);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.mapping-title {
  font-size: 16px;
}

.mapping-text {
  margin-top: 6px;
  font-size: 14px;
  color: var(--c-muted);
}

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

/* --------------------------------------------------------------------------
   pages：帮助中心
   -------------------------------------------------------------------------- */
.support-figure {
  margin: 18px 0 0;
}

.support-figure img {
  width: 100%;
  max-width: 720px;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.support-figure-caption {
  margin-top: 8px;
  font-size: 13px;
  color: var(--c-muted);
}

.support-section {
  margin-top: 20px;
}

.support-group {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

.support-group-summary {
  padding: 16px 20px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

.support-group-summary::-webkit-details-marker {
  display: none;
}

.support-group-summary::after {
  content: "＋";
  float: right;
  font-size: 16px;
  color: var(--c-a);
}

.support-group[open] .support-group-summary::after {
  content: "－";
}

.support-group-body {
  padding: 0 20px 20px;
  border-top: 1px solid var(--c-line);
}

.support-lead {
  margin-top: 14px;
  max-width: var(--read);
  font-size: 15px;
  color: var(--c-muted);
}

.support-group-body .step-list {
  margin-top: 16px;
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.support-group-body .step-item {
  display: grid;
  grid-template-columns: 32px minmax(0, 1fr);
  gap: 10px;
  align-items: start;
}

.step-index {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 600;
  color: var(--c-a);
}

.step-content {
  min-width: 0;
}

.step-text {
  font-size: 14px;
  color: var(--c-muted);
}

.feature-list,
.trouble-list,
.contact-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

.feature-item,
.trouble-item,
.contact-item {
  padding: 14px 16px;
  border: 1px solid var(--c-line);
  border-left: 3px solid var(--c-b);
  border-radius: var(--radius);
  background: var(--c-bg);
}

.trouble-item {
  border-left-color: var(--c-c);
}

.contact-item {
  border-left-color: var(--c-a);
}

.feature-name,
.trouble-title,
.contact-title {
  font-size: 16px;
}

.feature-text,
.trouble-text,
.contact-text {
  margin-top: 6px;
  font-size: 14px;
  color: var(--c-muted);
}

/* --------------------------------------------------------------------------
   pages：404
   -------------------------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 56px 20px 72px;
}

.error-panel {
  width: 100%;
  max-width: 640px;
  padding: 32px 28px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
  text-align: center;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 600;
  color: var(--c-a);
}

.error-panel h1 {
  margin-top: 8px;
  font-size: 26px;
}

.error-text {
  margin-top: 12px;
  font-size: 15px;
  color: var(--c-muted);
}

.error-actions {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 24px;
}

.error-link {
  display: block;
  padding: 10px 12px;
  min-height: 44px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-bg);
  color: var(--c-text);
  font-size: 14px;
  text-align: center;
  text-decoration: none;
}

.error-link:hover {
  border-color: var(--c-a);
  color: var(--c-a);
}

/* --------------------------------------------------------------------------
   responsive：960px 与 640px 断点
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .page-title,
  .hero-title {
    font-size: 30px;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .hero-media {
    order: -1;
  }

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

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

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

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

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

  .basis-list,
  .mapping-grid,
  .feature-list,
  .trouble-list,
  .contact-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

@media (max-width: 640px) {
  .header-inner {
    padding: 10px 16px;
  }

  .brand-slogan {
    display: none;
  }

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

  .site-nav {
    flex-basis: 100%;
    margin-left: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 4px;
    border-top: 1px solid var(--c-line);
  }

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

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

  .nav-link.is-current {
    box-shadow: inset 3px 0 0 var(--c-a);
  }

  .inner-main,
  .home-main {
    padding: 16px 16px 44px;
  }

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

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

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

  .hero {
    padding: 22px 0 4px;
  }

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

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

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

  .step-list,
  .support-group-body .step-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .update-list .update-row {
    grid-template-columns: 78px minmax(0, 1fr);
    grid-template-areas:
      "date name"
      "date genre"
      "date status";
  }

  .update-list .update-genre {
    white-space: normal;
  }

  .pick-row {
    grid-template-columns: 38px minmax(0, 1fr);
    grid-template-areas:
      "rank name"
      "rank reason";
  }

  .pick-row .pick-rank {
    grid-area: rank;
  }

  .pick-row .pick-name {
    grid-area: name;
  }

  .pick-row .pick-reason {
    grid-area: reason;
  }

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

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

  .pick-item {
    grid-template-columns: 40px minmax(0, 1fr);
    grid-template-areas:
      "rank cover"
      "rank body";
    gap: 10px 14px;
  }

  .pick-item .pick-rank {
    grid-area: rank;
  }

  .pick-item .pick-cover {
    grid-area: cover;
  }

  .pick-item .pick-body {
    grid-area: body;
  }

  .pick-cover img {
    width: 120px;
    height: 160px;
  }

  .update-rows .update-row {
    grid-template-columns: 76px minmax(0, 1fr);
    gap: 12px;
  }

  .update-thumb img {
    width: 76px;
    height: 102px;
  }

  .field-spec-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

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

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

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

  .error-panel {
    padding: 24px 18px;
  }
}