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

/* --------------------------------------------------------------------------
   base
   -------------------------------------------------------------------------- */

:root {
  --c-ink: #111111;
  --c-ink-soft: #4a4a4a;
  --c-ink-mute: #8a8a8a;
  --c-line: #e6e6e6;
  --c-surface: #f6f6f6;
  --c-page: #ffffff;
  --c-invert: #ffffff;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", monospace;
  --shell: 1120px;
  --col-text: 720px;
  --gap: 32px;
  --radius: 6px;
  --radius-sm: 4px;
  --header-h: 68px;
}

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

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

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

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 700;
  line-height: 1.3;
  color: var(--c-ink);
}

p {
  margin: 0;
}

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

a {
  color: var(--c-ink);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--c-ink-soft);
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--c-page);
  border-bottom: 1px solid var(--c-line);
}

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

.brand-logo {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 20px;
  font-weight: 700;
  color: var(--c-ink);
  white-space: nowrap;
}

.brand-logo:hover,
.brand-logo:focus-visible {
  color: var(--c-ink-soft);
}

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

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

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

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

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--c-ink-soft);
  border-bottom: 2px solid transparent;
}

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--c-ink);
}

.nav-link.is-current {
  color: var(--c-ink);
  font-weight: 700;
  border-bottom-color: var(--c-ink);
}

.site-main {
  display: block;
}

.inner-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 24px 24px 72px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--c-ink-mute);
  padding: 4px 0 16px;
}

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

.breadcrumb a:hover,
.breadcrumb a:focus-visible {
  color: var(--c-ink);
}

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

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

.page-header {
  padding-bottom: 28px;
  border-bottom: 1px solid var(--c-line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--c-ink);
  max-width: var(--col-text);
}

.page-description {
  margin-top: 12px;
  max-width: var(--col-text);
  color: var(--c-ink-soft);
  font-size: 16px;
}

.page-lead {
  margin-top: 12px;
  max-width: var(--col-text);
  color: var(--c-ink-mute);
  font-size: 15px;
}

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

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px 24px 32px;
}

.footer-brand {
  font-size: 17px;
  font-weight: 700;
  color: var(--c-ink);
}

.footer-slogan {
  margin-top: 6px;
  font-size: 14px;
  color: var(--c-ink-mute);
}

.footer-nav {
  margin-top: 20px;
}

.footer-nav-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
}

.footer-nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

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

.footer-note {
  margin-top: 16px;
  font-size: 13px;
  color: var(--c-ink-mute);
  max-width: var(--col-text);
}

.footer-copy {
  margin-top: 12px;
  padding-top: 16px;
  border-top: 1px solid var(--c-line);
  font-size: 13px;
  color: var(--c-ink-mute);
}

/* --------------------------------------------------------------------------
   components · 通用模块
   -------------------------------------------------------------------------- */

.section {
  margin-bottom: 56px;
}

.section-title {
  font-size: 24px;
  color: var(--c-ink);
}

.section-head {
  max-width: var(--shell);
  margin: 0 auto 24px;
  padding: 0 24px;
}

.section-desc {
  margin-top: 10px;
  max-width: var(--col-text);
  color: var(--c-ink-soft);
  font-size: 15px;
}

.section-intro,
.section-lead {
  margin-top: 10px;
  margin-bottom: 24px;
  max-width: var(--col-text);
  color: var(--c-ink-soft);
  font-size: 15px;
}

.tag {
  display: inline-block;
  padding: 2px 8px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  font-size: 12px;
  line-height: 1.6;
  color: var(--c-ink-soft);
  background: var(--c-surface);
}

/* 封面条目卡 */

.entry-card {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
  overflow: hidden;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.entry-card:hover {
  border-color: var(--c-ink-mute);
  box-shadow: 0 4px 14px rgba(17, 17, 17, 0.08);
}

.entry-cover {
  aspect-ratio: 3 / 4;
  background: var(--c-surface);
  overflow: hidden;
}

.entry-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.25s ease, transform 0.25s ease;
}

.entry-card:hover .entry-cover img {
  filter: grayscale(0%);
  transform: scale(1.03);
}

.entry-title {
  font-size: 15px;
  color: var(--c-ink);
}

.entry-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

/* 字段说明表 */

.field-table {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 14px;
}

.field-table caption,
.field-caption,
.field-table-caption {
  caption-side: top;
  text-align: left;
  padding: 10px 14px;
  font-size: 13px;
  color: var(--c-ink-mute);
  background: var(--c-surface);
  border-bottom: 1px solid var(--c-line);
}

.field-table th,
.field-table td {
  padding: 10px 14px;
  text-align: left;
  border-bottom: 1px solid var(--c-line);
  vertical-align: top;
}

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

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

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

.field-sample {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink-mute);
}

.field-mini {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--c-ink-soft);
}

/* 规则摘要框 */

.rule-box {
  margin-top: 24px;
  padding: 20px 22px;
  background: var(--c-surface);
  border-radius: var(--radius);
}

.rule-box-title,
.rule-box .rule-title {
  font-size: 17px;
  color: var(--c-ink);
  margin-bottom: 10px;
}

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

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

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

/* 相关链接列表 */

.related-list,
.more-list {
  display: grid;
  gap: 12px;
}

.related-item a,
.more-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  font-weight: 700;
  border-bottom: 1px solid var(--c-line);
  width: 100%;
}

.more-item {
  border-bottom: 1px solid var(--c-line);
  padding-bottom: 8px;
}

.more-desc {
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* 页内锚点导航 */

.anchor-nav {
  margin-bottom: 32px;
}

.anchor-nav-list,
.anchor-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 12px;
}

.anchor-nav-list a,
.anchor-link,
.anchor-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-size: 14px;
  color: var(--c-ink-soft);
  border: 1px solid var(--c-line);
  border-radius: var(--radius-sm);
  background: var(--c-page);
}

.anchor-nav-list a:hover,
.anchor-link:hover,
.anchor-list a:hover,
.anchor-nav-list a:focus-visible,
.anchor-link:focus-visible,
.anchor-list a:focus-visible {
  color: var(--c-ink);
  border-color: var(--c-ink);
}

/* 内容配图 */

.content-figure,
.path-figure {
  margin-bottom: 24px;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-surface);
}

.content-figure img,
.path-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  filter: grayscale(100%);
}

.content-figure figcaption,
.path-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--c-ink-mute);
  background: var(--c-surface);
}

/* 通用按钮 */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 20px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 700;
  border: 1px solid var(--c-ink);
}

.btn-primary {
  background: var(--c-ink);
  color: var(--c-invert);
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background: var(--c-ink-soft);
  border-color: var(--c-ink-soft);
  color: var(--c-invert);
}

.btn-ghost {
  background: var(--c-page);
  color: var(--c-ink);
}

.btn-ghost:hover,
.btn-ghost:focus-visible {
  background: var(--c-surface);
  color: var(--c-ink);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */

.hero-section {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  min-height: 460px;
  background: var(--c-ink);
  overflow: hidden;
}

.hero-media {
  position: absolute;
  inset: 0;
}

.hero-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%) brightness(0.5);
}

.hero-content {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: var(--shell);
  margin: 0 auto;
  padding: 72px 24px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  color: var(--c-invert);
}

.hero-title {
  font-size: 40px;
  color: var(--c-invert);
  max-width: 680px;
}

.hero-lead {
  margin-top: 16px;
  max-width: 620px;
  font-size: 17px;
  color: rgba(255, 255, 255, 0.82);
}

.hero-entry-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}

.hero-entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.6);
  border-radius: var(--radius-sm);
  font-size: 15px;
  color: var(--c-invert);
  background: rgba(17, 17, 17, 0.35);
}

.hero-entry-link:hover,
.hero-entry-link:focus-visible {
  background: var(--c-invert);
  color: var(--c-ink);
  border-color: var(--c-invert);
}

.topics-overview {
  padding: 64px 0 8px;
}

.topic-grid {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--gap);
}

.topic-column {
  display: flex;
  flex-direction: column;
  border-top: 2px solid var(--c-ink);
  padding-top: 16px;
}

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

.topic-scope {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-ink-soft);
  min-height: 48px;
}

.topic-thumb {
  margin-top: 14px;
  aspect-ratio: 4 / 3;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--c-surface);
}

.topic-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.25s ease;
}

.topic-column:hover .topic-thumb img {
  filter: grayscale(0%);
}

.topic-more {
  margin-top: 14px;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--c-ink);
  align-self: flex-start;
}

.home-split {
  padding: 64px 0 8px;
}

.split-layout {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  gap: 48px;
  align-items: start;
}

.split-main,
.split-aside {
  min-width: 0;
}

.split-subtitle {
  font-size: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.split-desc {
  margin-top: 12px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.entry-card-grid {
  margin-top: 20px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.entry-card-grid .entry-card {
  display: flex;
  flex-direction: column;
}

.entry-card-grid .entry-card .entry-title,
.entry-card-grid .entry-card .entry-tags {
  padding: 0 14px;
}

.entry-card-grid .entry-card .entry-title {
  margin-top: 12px;
}

.entry-card-grid .entry-card .entry-tags {
  padding-bottom: 14px;
}

.split-more {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 20px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--c-ink);
}

.update-group {
  margin-top: 20px;
}

.update-date {
  font-size: 14px;
  font-family: var(--font-mono);
  color: var(--c-ink-mute);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--c-line);
}

.update-list {
  display: grid;
}

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

.update-name {
  font-weight: 700;
  color: var(--c-ink);
}

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

.home-rank {
  padding: 64px 0 8px;
}

.rank-layout {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
  gap: 48px;
  align-items: start;
}

.rank-main,
.rank-aside {
  min-width: 0;
}

.rank-subtitle {
  font-size: 20px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-line);
}

.rank-list {
  margin-top: 16px;
  counter-reset: rank;
}

.rank-row {
  display: grid;
  grid-template-columns: 44px minmax(0, 1fr) minmax(120px, auto);
  align-items: baseline;
  gap: 12px;
  padding: 12px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 14px;
}

.rank-no {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--c-ink);
}

.rank-name {
  font-weight: 700;
  color: var(--c-ink);
}

.rank-note {
  font-size: 13px;
  color: var(--c-ink-mute);
  text-align: right;
}

.rank-more {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--c-ink);
}

.rank-aside .field-table {
  margin-top: 16px;
}

.home-guide {
  padding: 64px 0 8px;
}

.guide-steps {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
}

.guide-step {
  border-left: 2px solid var(--c-ink);
  padding-left: 18px;
}

.step-name {
  font-size: 17px;
}

.step-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.guide-entry {
  max-width: var(--shell);
  margin: 40px auto 0;
  padding: 24px;
  background: var(--c-surface);
  border-radius: var(--radius);
}

.guide-entry-title {
  font-size: 18px;
}

.guide-entry-desc {
  margin-top: 8px;
  max-width: var(--col-text);
  font-size: 14px;
  color: var(--c-ink-soft);
}

.guide-entry-links {
  margin-top: 16px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.guide-entry-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--c-ink);
}

.home-index {
  padding: 64px 0 72px;
}

.index-columns {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 24px;
}

.index-column {
  border-top: 2px solid var(--c-ink);
  padding-top: 14px;
  min-width: 0;
}

.index-name {
  font-size: 16px;
}

.index-name a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}

.index-desc {
  margin-top: 6px;
  font-size: 13px;
  color: var(--c-ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 题材分类
   -------------------------------------------------------------------------- */

.topic-list {
  display: grid;
  gap: 24px;
}

.topic-block {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 260px;
  gap: 28px;
  padding: 24px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  align-items: start;
}

.topic-block-body {
  min-width: 0;
}

.topic-block .topic-name {
  font-size: 19px;
}

.topic-block .topic-scope {
  min-height: 0;
  margin-top: 10px;
}

.topic-fit {
  margin-top: 10px;
  font-size: 14px;
  color: var(--c-ink-mute);
}

.topic-block .topic-thumb {
  margin-top: 0;
  aspect-ratio: 16 / 10;
}

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

.entry-grid .entry-card {
  display: flex;
  flex-direction: column;
}

.entry-body {
  padding: 12px 14px 16px;
  min-width: 0;
}

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

/* --------------------------------------------------------------------------
   pages · 更新记录
   -------------------------------------------------------------------------- */

.updates-groups {
  display: grid;
  gap: 28px;
}

.update-group .update-date {
  font-size: 16px;
  color: var(--c-ink);
  border-bottom: 2px solid var(--c-ink);
}

.update-rows {
  display: grid;
}

.update-row {
  display: grid;
  grid-template-columns: minmax(0, 2fr) minmax(96px, 1fr) minmax(96px, 1fr) minmax(96px, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--c-line);
  font-size: 14px;
}

.update-row-title {
  font-weight: 700;
  color: var(--c-ink);
}

.update-row-tag {
  font-size: 13px;
  color: var(--c-ink-soft);
}

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

.update-row-status {
  font-size: 13px;
  color: var(--c-ink-mute);
}

/* --------------------------------------------------------------------------
   pages · 人气位次
   -------------------------------------------------------------------------- */

.ranking-list {
  display: grid;
  gap: 12px;
}

.ranking-item {
  display: grid;
  grid-template-columns: 52px 96px minmax(0, 1fr);
  gap: 18px;
  align-items: center;
  padding: 16px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
  transition: border-color 0.2s ease;
}

.ranking-item:hover {
  border-color: var(--c-ink-mute);
}

.rank-num {
  font-family: var(--font-mono);
  font-size: 22px;
  font-weight: 700;
  color: var(--c-ink);
  text-align: center;
}

.rank-cover {
  aspect-ratio: 3 / 4;
  border-radius: var(--radius-sm);
  overflow: hidden;
  background: var(--c-surface);
}

.rank-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: grayscale(100%);
  transition: filter 0.25s ease;
}

.ranking-item:hover .rank-cover img {
  filter: grayscale(0%);
}

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

.rank-title {
  font-size: 17px;
}

.rank-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 8px;
}

.rank-body .rank-note {
  margin-top: 8px;
  text-align: left;
  font-size: 14px;
  color: var(--c-ink-soft);
}

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

.rule-card {
  padding: 20px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-surface);
}

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

.rule-text {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 查阅指引
   -------------------------------------------------------------------------- */

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  gap: 48px;
  align-items: start;
}

.layout-shell {
  max-width: var(--shell);
  margin: 0 auto;
}

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

.side-column {
  min-width: 0;
  display: grid;
  gap: 24px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.side-block {
  border-top: 2px solid var(--c-ink);
  padding-top: 14px;
}

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

.step-list {
  display: grid;
  gap: 20px;
  counter-reset: step;
}

.step-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  grid-template-areas:
    "index title"
    "index text";
  column-gap: 16px;
  row-gap: 6px;
  padding: 18px;
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
}

.step-index {
  grid-area: index;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--c-ink);
}

.step-title {
  grid-area: title;
  font-size: 17px;
}

.step-text {
  grid-area: text;
  font-size: 14px;
  color: var(--c-ink-soft);
}

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

.feedback-card {
  padding: 20px;
  background: var(--c-surface);
  border-radius: var(--radius);
}

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

.feedback-text {
  margin-top: 8px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

.entry-links {
  margin-top: 24px;
}

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

.entry-link-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 14px;
  font-weight: 700;
  border-bottom: 1px solid var(--c-ink);
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 1px solid var(--c-line);
  border-radius: var(--radius);
  background: var(--c-page);
}

.faq-question {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 18px;
  font-size: 15px;
  font-weight: 700;
  color: var(--c-ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-family: var(--font-mono);
  font-size: 18px;
  color: var(--c-ink-mute);
}

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

.faq-answer {
  padding: 0 18px 16px;
  font-size: 14px;
  color: var(--c-ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */

.error-main {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 80px 24px 96px;
}

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

.error-code {
  font-family: var(--font-mono);
  font-size: 56px;
  font-weight: 700;
  color: var(--c-line);
  line-height: 1;
}

.error-title {
  margin-top: 16px;
  font-size: 30px;
}

.error-text {
  margin-top: 12px;
  color: var(--c-ink-soft);
}

.error-actions {
  margin-top: 28px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.error-hint {
  margin-top: 24px;
  font-size: 14px;
  color: var(--c-ink-mute);
}

.error-hint a {
  border-bottom: 1px solid var(--c-ink-mute);
}

/* --------------------------------------------------------------------------
   responsive · 768px 断点
   -------------------------------------------------------------------------- */

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    flex-wrap: wrap;
    gap: 0;
  }

  .brand-logo {
    font-size: 18px;
  }

  .nav-toggle {
    display: block;
  }

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

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 8px 0 12px;
    border-top: 1px solid var(--c-line);
  }

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

  .nav-link {
    padding: 0 4px;
    border-bottom: 1px solid var(--c-line);
  }

  .nav-link.is-current {
    border-bottom-color: var(--c-ink);
  }

  .inner-main {
    padding: 20px 16px 56px;
  }

  .page-header {
    padding-bottom: 20px;
    margin-bottom: 24px;
  }

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

  .section {
    margin-bottom: 44px;
  }

  .section-title {
    font-size: 21px;
  }

  .section-head {
    padding: 0 16px;
  }

  .hero-section {
    min-height: 380px;
  }

  .hero-content {
    padding: 56px 16px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-lead {
    font-size: 15px;
  }

  .hero-entry-list {
    gap: 10px;
  }

  .hero-entry-link {
    padding: 0 16px;
    font-size: 14px;
  }

  .topics-overview,
  .home-split,
  .home-rank,
  .home-guide {
    padding-top: 48px;
  }

  .home-index {
    padding: 48px 0 56px;
  }

  .topic-grid {
    padding: 0 16px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }

  .split-layout,
  .rank-layout {
    padding: 0 16px;
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .entry-card-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .rank-note {
    grid-column: 2;
    text-align: left;
  }

  .guide-steps {
    padding: 0 16px;
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .guide-entry {
    margin: 32px 16px 0;
    padding: 20px;
  }

  .index-columns {
    padding: 0 16px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-block {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
    padding: 18px;
  }

  .entry-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
  }

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

  .ranking-item {
    grid-template-columns: 40px 72px minmax(0, 1fr);
    gap: 12px;
    padding: 14px;
  }

  .rank-num {
    font-size: 18px;
  }

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

  .page-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 40px;
  }

  .side-column {
    position: static;
  }

  .step-item {
    grid-template-columns: 40px minmax(0, 1fr);
    padding: 16px;
  }

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

  .field-table caption,
  .field-table thead,
  .field-table tbody,
  .field-table tr,
  .field-table th,
  .field-table td {
    white-space: normal;
  }

  .footer-inner {
    padding: 32px 16px 24px;
  }

  .error-main {
    padding: 56px 16px 72px;
  }

  .error-code {
    font-size: 44px;
  }

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

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

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

  .hero-title {
    font-size: 25px;
  }

  .ranking-item {
    grid-template-columns: 36px 64px minmax(0, 1fr);
  }
}