/* ==========================================================================
   汗汗漫画 · 全站样式表
   结构：base → layout → components → pages → responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base：变量、重置、排版基线
   -------------------------------------------------------------------------- */
:root {
  --ink: #1b2a41;
  --ink-soft: #33445e;
  --accent: #e0733a;
  --accent-deep: #c25a26;
  --paper: #f7f5f1;
  --line: #e2ddd4;
  --muted: #6b7a8f;
  --card-bg: #ffffff;
  --radius: 8px;
  --radius-sm: 6px;
  --shadow: 0 1px 2px rgba(27, 42, 65, 0.06);
  --shadow-hover: 0 6px 18px rgba(27, 42, 65, 0.1);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system,
    "Segoe UI", Roboto, Arial, 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;
  padding: 0;
  background: var(--paper);
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  font-weight: 400;
}

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

figure {
  margin: 0;
}

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

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 600;
  line-height: 1.35;
}

p {
  margin: 0;
}

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

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
  border-radius: 3px;
}

strong {
  color: var(--ink);
  font-weight: 600;
}

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

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

/* --------------------------------------------------------------------------
   layout：全站骨架（页头 / 导航 / 主容器 / 面包屑 / 页脚）
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--paper);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--ink);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.header-inner {
  width: 100%;
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 44px;
  color: #ffffff;
  font-weight: 600;
}

.brand:hover,
.brand:focus-visible {
  color: #ffffff;
}

.brand-mark {
  width: 26px;
  height: 26px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  position: relative;
  flex: none;
}

.brand-mark::after {
  content: "";
  position: absolute;
  inset: 8px 6px;
  border-top: 2px solid #ffffff;
  border-bottom: 2px solid #ffffff;
}

.brand-name {
  font-size: 18px;
  letter-spacing: 0.02em;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-list li {
  display: flex;
}

.nav-list a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 2px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  border-bottom: 2px solid transparent;
}

.nav-list a:hover,
.nav-list a:focus-visible {
  color: #ffffff;
  border-bottom-color: rgba(255, 255, 255, 0.4);
}

.nav-list a.is-current {
  color: #ffffff;
  border-bottom-color: var(--accent);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
}

.nav-toggle:hover {
  background: rgba(255, 255, 255, 0.1);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: #ffffff;
  border-radius: 1px;
}

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

.home-main {
  display: block;
}

.inner-main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--muted);
}

.breadcrumb a {
  color: var(--muted);
  min-height: 22px;
}

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

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

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

.page-header {
  padding: 22px 0 28px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 36px;
}

.page-title {
  font-size: 28px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.page-description {
  font-size: 16px;
  line-height: 1.75;
  color: var(--muted);
  max-width: 760px;
}

.section {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px 0;
}

.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.section-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 18px;
  margin-bottom: 26px;
}

.section-head h2 {
  font-size: 22px;
  font-weight: 600;
}

.section-note {
  font-size: 14px;
  color: var(--muted);
  max-width: 640px;
}

.section-desc {
  font-size: 15px;
  color: var(--muted);
  margin-bottom: 22px;
}

.section-intro {
  font-size: 15px;
  color: var(--muted);
  max-width: 780px;
  margin-bottom: 24px;
}

.section-intro a {
  color: var(--accent-deep);
  border-bottom: 1px solid rgba(224, 115, 58, 0.4);
}

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

.section-more {
  margin-top: 22px;
  font-size: 15px;
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-deep);
  font-weight: 600;
  min-height: 44px;
  border-bottom: 1px solid transparent;
}

.link-more::after {
  content: "→";
  font-size: 14px;
}

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

.column-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 14px;
}

.sub-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 10px;
}

.subsection-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

/* 页脚 */
.site-footer {
  margin-top: 72px;
  background: var(--ink);
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.footer-top {
  display: grid;
  grid-template-columns: minmax(220px, 1fr) minmax(0, 2fr);
  gap: 32px 40px;
  padding-bottom: 32px;
}

.footer-brand-name {
  font-size: 18px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 8px;
}

.footer-brand-desc {
  line-height: 1.7;
  max-width: 320px;
  color: rgba(255, 255, 255, 0.62);
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px 32px;
}

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 12px;
}

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

.footer-group a {
  color: rgba(255, 255, 255, 0.68);
  display: inline-block;
  min-height: 24px;
}

.footer-group a:hover,
.footer-group a:focus-visible {
  color: #ffffff;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.14);
  padding-top: 18px;
}

.footer-copyright {
  color: rgba(255, 255, 255, 0.55);
  font-size: 13px;
}

/* --------------------------------------------------------------------------
   components：封面卡、标签、列表行、表格、FAQ、栏目索引
   -------------------------------------------------------------------------- */
.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 4px;
  background: rgba(224, 115, 58, 0.12);
  color: var(--accent-deep);
  font-size: 12px;
  line-height: 1.7;
}

.status {
  display: inline-block;
  font-size: 12px;
  color: var(--muted);
}

/* 封面卡（首页作品墙） */
.cover-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px 20px;
}

.cover-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  box-shadow: var(--shadow);
  transition: box-shadow 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.cover-card:hover {
  border-color: rgba(224, 115, 58, 0.5);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.cover-figure {
  width: 100%;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #ece7df;
}

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

.cover-card.cover-wide {
  grid-column: span 2;
}

.cover-card.cover-wide .cover-figure {
  aspect-ratio: 16 / 9;
}

.cover-card.cover-tall .cover-figure {
  aspect-ratio: 2 / 3;
}

.cover-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.cover-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}

/* 题材方向分组容器 */
.topics-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.topic-column {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topic-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.topic-trait {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.topic-sample {
  font-size: 13px;
  color: var(--ink-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 6px 8px;
  padding-top: 6px;
  border-top: 1px dashed var(--line);
}

.topic-sample .work-name {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 4px;
  background: rgba(27, 42, 65, 0.06);
  color: var(--ink-soft);
}

/* 更新记录行（首页） */
.update-list {
  border-top: 1px solid var(--line);
}

.update-row {
  display: grid;
  grid-template-columns: 96px minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 0.9fr);
  align-items: center;
  gap: 12px 18px;
  padding: 13px 10px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
  transition: background-color 0.18s ease;
}

.update-row:hover {
  background: rgba(224, 115, 58, 0.06);
}

.update-date {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.update-work {
  color: var(--ink);
  font-weight: 600;
}

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

.update-progress {
  color: var(--accent-deep);
  font-size: 14px;
  text-align: right;
}

/* 人气榜单（首页） */
.ranking-editorial-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr);
  gap: 32px;
}

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

.ranking-list {
  border-top: 1px solid var(--line);
}

.ranking-row {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr) minmax(0, 0.8fr);
  align-items: center;
  gap: 12px;
  padding: 11px 8px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.ranking-row:hover {
  background: rgba(224, 115, 58, 0.06);
}

.rank-no {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent-deep);
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}

.rank-work {
  color: var(--ink);
  font-weight: 600;
}

.rank-topic {
  color: var(--muted);
  font-size: 13px;
}

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

.editorial-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.editorial-item {
  padding-bottom: 14px;
  border-bottom: 1px dashed var(--line);
}

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

.editorial-item a {
  display: inline-block;
  font-weight: 600;
  color: var(--ink);
  min-height: 24px;
}

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

.editorial-note {
  margin-top: 4px;
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* 字段口径表（首页摘要） */
.guide-summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

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

.field-list {
  margin: 0;
  display: grid;
  grid-template-columns: minmax(96px, auto) minmax(0, 1fr);
  gap: 8px 16px;
  font-size: 14px;
}

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

.field-list dd {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

/* 站内栏目索引（首页） */
.site-index {
  max-width: 1080px;
  margin: 0 auto;
  padding: 56px 24px 0;
}

.site-index-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 20px;
}

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

.site-index-item a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 44px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.site-index-item a:hover {
  border-color: rgba(224, 115, 58, 0.5);
  box-shadow: var(--shadow-hover);
}

.site-index-item .index-name {
  font-weight: 600;
  color: var(--ink);
}

.index-note {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* 通用规则列表 */
.rule-list,
.plain-list,
.method-list,
.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.rule-list li,
.plain-list li,
.method-list li,
.boundary-list li {
  position: relative;
  padding-left: 16px;
  line-height: 1.75;
}

.rule-list li::before,
.plain-list li::before,
.method-list li::before,
.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* 字段说明列表（最近更新页） */
.fields-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.fields-item {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px 14px;
}

.fields-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.fields-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.fields-note {
  margin-top: 18px;
  font-size: 14px;
  color: var(--muted);
}

.fields-note a {
  color: var(--accent-deep);
  border-bottom: 1px solid rgba(224, 115, 58, 0.4);
}

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

/* 字段口径表（阅读说明页） */
.field-table {
  width: 100%;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  font-size: 15px;
}

.field-table caption {
  caption-side: top;
  text-align: left;
  padding: 0 0 12px;
  font-size: 14px;
  color: var(--muted);
}

.field-table th,
.field-table td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
  line-height: 1.7;
}

.field-table thead th {
  background: rgba(27, 42, 65, 0.05);
  color: var(--ink);
  font-weight: 600;
  font-size: 14px;
}

.field-table tbody th {
  color: var(--ink);
  font-weight: 600;
  width: 22%;
}

.field-table tbody td {
  color: var(--ink-soft);
}

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

/* FAQ 折叠项 */
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 15px 18px;
  min-height: 44px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  flex: none;
  font-size: 18px;
  color: var(--accent);
  line-height: 1;
}

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

.faq-item[open] .faq-question {
  color: var(--accent-deep);
}

.faq-answer {
  padding: 0 18px 16px;
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
}

/* 栏目索引（阅读说明页） */
.column-index {
  max-width: 1080px;
  margin: 56px auto 0;
  padding: 0 24px;
}

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

.column-index-item a {
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 16px 14px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  min-height: 44px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.column-index-item a:hover {
  border-color: rgba(224, 115, 58, 0.5);
  box-shadow: var(--shadow-hover);
}

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

.column-index-desc {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */
.hero {
  max-width: 1080px;
  margin: 0 auto;
  padding: 48px 24px 8px;
  display: grid;
  grid-template-columns: minmax(0, 6fr) minmax(0, 5fr);
  gap: 40px;
  align-items: start;
}

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

.hero-eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-deep);
  background: rgba(224, 115, 58, 0.12);
  border-radius: 4px;
  padding: 2px 10px;
  margin-bottom: 16px;
}

.hero-title {
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink);
  margin-bottom: 16px;
}

.hero-lead {
  font-size: 16px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 560px;
  margin-bottom: 22px;
}

.hero-lines {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.hero-lines li {
  display: flex;
}

.hero-lines a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 44px;
  padding: 0 14px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.hero-lines a::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  flex: none;
}

.hero-lines a:hover {
  border-color: rgba(224, 115, 58, 0.5);
  box-shadow: var(--shadow-hover);
  color: var(--accent-deep);
}

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

.hero-figure {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #ece7df;
}

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

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

.hero-thumb {
  width: 100%;
  aspect-ratio: 3 / 2;
  overflow: hidden;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #ece7df;
}

.hero-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* --------------------------------------------------------------------------
   pages：题材方向页
   -------------------------------------------------------------------------- */
.topic-rows {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.topic-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(200px, 300px);
  gap: 28px;
  align-items: center;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.topic-row:hover {
  border-color: rgba(224, 115, 58, 0.5);
  box-shadow: var(--shadow-hover);
}

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

.topic-row-body .topic-name {
  font-size: 19px;
  margin-bottom: 10px;
}

.topic-desc {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 14px;
}

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 14px;
}

.topic-tag {
  font-size: 13px;
  padding: 2px 10px;
  border-radius: 4px;
  background: rgba(27, 42, 65, 0.06);
  color: var(--ink-soft);
}

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

.topic-rep strong {
  color: var(--ink);
  margin-right: 6px;
}

.topic-figure {
  width: 100%;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: #ece7df;
}

.topic-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.topic-figure figcaption {
  display: none;
}

.tag-diff-section {
  margin-top: 56px;
}

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

.tag-diff-col {
  min-width: 0;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.tag-diff-col p {
  font-size: 15px;
  color: var(--ink-soft);
  line-height: 1.8;
  margin-bottom: 14px;
}

.rep-works-section {
  margin-top: 56px;
}

.rep-works-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 22px 20px;
}

.rep-work-card {
  display: flex;
  flex-direction: column;
  gap: 10px;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 12px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.rep-work-card:hover {
  border-color: rgba(224, 115, 58, 0.5);
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.rep-work-figure {
  width: 100%;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #ece7df;
}

.rep-work-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.rep-work-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
}

.rep-work-tag {
  font-size: 13px;
  color: var(--muted);
}

.section-foot {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 15px;
}

.section-foot a {
  color: var(--accent-deep);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

/* --------------------------------------------------------------------------
   pages：最近更新页
   -------------------------------------------------------------------------- */
.updates-block {
  margin-bottom: 8px;
}

.updates-group {
  margin-bottom: 28px;
}

.updates-date {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line);
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

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

.updates-row {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 14px 8px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s ease;
}

.updates-row:hover {
  background: rgba(224, 115, 58, 0.06);
}

.updates-thumb {
  width: 72px;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #ece7df;
}

.updates-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.updates-info {
  min-width: 0;
}

.updates-name {
  display: inline-block;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  min-height: 24px;
}

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

.updates-meta {
  margin-top: 4px;
  font-size: 14px;
  color: var(--muted);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
}

.updates-topic {
  color: var(--muted);
}

.updates-chapter {
  color: var(--accent-deep);
}

.updates-more {
  margin-top: 12px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 15px;
}

.updates-more a {
  color: var(--accent-deep);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

.updates-fields {
  margin-top: 56px;
}

.updates-topics {
  margin-top: 56px;
}

.topics-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 18px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.topics-name {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
}

.topics-desc {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

.topics-rep {
  font-size: 13px;
  color: var(--ink-soft);
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

.topics-rep a {
  color: var(--accent-deep);
  font-weight: 600;
}

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

/* --------------------------------------------------------------------------
   pages：人气榜单页
   -------------------------------------------------------------------------- */
.page-layout {
  display: block;
}

.ranking-board {
  margin-bottom: 8px;
}

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

.rank-item {
  display: grid;
  grid-template-columns: 36px 84px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 14px 8px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s ease;
}

.rank-item:hover {
  background: rgba(224, 115, 58, 0.06);
}

.rank-cover {
  width: 84px;
  aspect-ratio: 3 / 4;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background: #ece7df;
}

.rank-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.rank-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.rank-body .rank-topic {
  margin-top: 4px;
  font-size: 14px;
}

.rank-reason {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
}

.ranking-more {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  font-size: 15px;
}

.ranking-more a {
  color: var(--accent-deep);
  font-weight: 600;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

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

.ranking-reasons {
  margin-top: 56px;
}

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

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

.reason-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.reason-topic {
  margin-top: 4px;
  font-size: 13px;
  color: var(--accent-deep);
}

.reason-text {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
  line-height: 1.75;
}

.ranking-method {
  margin-top: 56px;
}

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

.method-col {
  min-width: 0;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

.method-col-title {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

/* --------------------------------------------------------------------------
   pages：阅读说明页
   -------------------------------------------------------------------------- */
.guide-section {
  margin-bottom: 56px;
}

.guide-section:last-of-type {
  margin-bottom: 0;
}

.guide-figure {
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: #ece7df;
  margin-bottom: 22px;
}

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

.guide-figure figcaption {
  display: none;
}

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

.naming-col,
.scope-col {
  min-width: 0;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
}

/* --------------------------------------------------------------------------
   pages：404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px 64px;
}

.error-panel {
  max-width: 640px;
  margin: 64px auto 0;
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px 32px;
  text-align: left;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 40px;
  font-weight: 600;
  color: var(--accent);
  line-height: 1;
  margin-bottom: 14px;
}

.error-panel h1 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: 12px;
}

.error-text {
  font-size: 15px;
  color: var(--muted);
  line-height: 1.8;
  margin-bottom: 24px;
}

.error-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin-bottom: 24px;
}

.error-links a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  transition: border-color 0.2s ease, color 0.2s ease;
}

.error-links a:hover {
  border-color: rgba(224, 115, 58, 0.5);
  color: var(--accent-deep);
}

.error-home {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 18px;
  background: var(--ink);
  color: #ffffff;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  transition: background-color 0.2s ease;
}

.error-home:hover,
.error-home:focus-visible {
  background: var(--accent-deep);
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   responsive：断点 1024 / 768 / 480
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .cover-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

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

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

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

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 64px;
    background: var(--ink);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 10px 24px rgba(0, 0, 0, 0.18);
  }

  .nav-list {
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 6px 8px 12px;
    display: none;
  }

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

  .nav-list li {
    display: block;
  }

  .nav-list a {
    display: flex;
    align-items: center;
    height: 48px;
    padding: 0 12px;
    border-bottom: 0;
    border-left: 3px solid transparent;
    font-size: 16px;
  }

  .nav-list a:hover,
  .nav-list a:focus-visible {
    border-bottom-color: transparent;
    border-left-color: rgba(255, 255, 255, 0.4);
    background: rgba(255, 255, 255, 0.06);
  }

  .nav-list a.is-current {
    border-left-color: var(--accent);
    background: rgba(255, 255, 255, 0.06);
  }

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

  .section,
  .site-index,
  .column-index {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 32px 16px 8px;
  }

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

  .hero-lead {
    max-width: none;
  }

  .page-header {
    padding: 18px 0 22px;
    margin-bottom: 28px;
  }

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

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

  .cover-card.cover-wide {
    grid-column: span 2;
  }

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

  .update-row {
    grid-template-columns: 84px minmax(0, 1fr);
    gap: 6px 12px;
    padding: 12px 8px;
  }

  .update-topic,
  .update-progress {
    grid-column: 2;
  }

  .update-progress {
    text-align: left;
  }

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

  .guide-summary-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
  }

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

  .field-list dd {
    margin-bottom: 10px;
  }

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

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

  .tag-diff-columns,
  .naming-columns,
  .scope-columns,
  .method-columns,
  .reason-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .rep-works-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px 14px;
  }

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

  .rank-item {
    grid-template-columns: 30px 64px minmax(0, 1fr);
    gap: 12px;
    padding: 12px 6px;
  }

  .rank-cover {
    width: 64px;
  }

  .updates-row {
    grid-template-columns: 60px minmax(0, 1fr);
    gap: 12px;
    padding: 12px 6px;
  }

  .updates-thumb {
    width: 60px;
  }

  .field-table th,
  .field-table td {
    padding: 10px 12px;
    font-size: 14px;
  }

  .field-table tbody th {
    width: 30%;
  }

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

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 24px;
  }

  .error-panel {
    margin-top: 36px;
    padding: 28px 20px;
  }
}

@media (max-width: 480px) {
  .hero-title {
    font-size: 23px;
  }

  .section-title,
  .site-index-title,
  .section-head h2 {
    font-size: 20px;
  }

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

  .cover-card.cover-wide {
    grid-column: auto;
  }

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

  .site-index-list,
  .column-index-list,
  .error-links {
    grid-template-columns: minmax(0, 1fr);
  }

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