/* ==========================================================================
   51吃瓜网站入口 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base：变量、重置、字体、链接
   -------------------------------------------------------------------------- */
:root {
  --bg-page: #F7F5F2;
  --bg-card: #FFFFFF;
  --ink: #14110F;
  --ink-soft: #6E6660;
  --accent: #E8552F;
  --line: #E4DED6;
  --wrap: 1120px;
  --radius: 6px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
}

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

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

body {
  margin: 0;
  background: var(--bg-page);
  color: var(--ink);
  font-family: var(--font);
  font-size: 15.5px;
  line-height: 1.75;
  font-weight: 400;
}

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

figure {
  margin: 0;
}

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

p {
  margin: 0 0 16px;
}

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

a {
  color: var(--ink);
  text-decoration: none;
  transition: color 160ms ease, border-color 160ms ease;
}

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

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

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

button {
  font: inherit;
  color: inherit;
}

/* --------------------------------------------------------------------------
   layout：页头、导航、主容器、内页骨架、页脚
   -------------------------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--bg-page);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  height: 64px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.brand {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

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

.main-nav {
  flex: 1 1 auto;
  min-width: 0;
}

.main-nav ul {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 20px;
}

.main-nav a {
  display: inline-block;
  padding: 6px 0;
  font-size: 14.5px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
}

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

.main-nav a.is-current {
  color: var(--accent);
  font-weight: 600;
  border-bottom-color: var(--accent);
}

.header-action {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  height: 36px;
  padding: 0 16px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  border-radius: var(--radius);
  white-space: nowrap;
}

.header-action:hover {
  color: #fff;
  background: #cf4522;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--ink);
}

.nav-toggle::before {
  top: 16px;
}

.nav-toggle::after {
  top: 25px;
}

.mobile-nav {
  display: none;
}

.site-main {
  display: block;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  margin-bottom: 14px;
}

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

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

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

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

.page-header {
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 34px;
  font-weight: 600;
  line-height: 1.3;
}

.page-head {
  margin-bottom: 32px;
}

.page-lead,
.page-lede {
  font-size: 15.5px;
  color: var(--ink-soft);
  max-width: 760px;
  margin-bottom: 18px;
}

.page-hero {
  margin-bottom: 36px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 60px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 240px minmax(0, 1fr);
}

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

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

/* 页脚 */
.site-footer {
  margin-top: 48px;
  border-top: 1px solid var(--line);
  background: var(--bg-page);
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px 24px 32px;
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 40px;
}

.footer-brand .brand {
  display: inline-block;
  margin-bottom: 10px;
}

.footer-brand p {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin: 0;
  max-width: 320px;
}

.footer-nav h2,
.footer-notes h2 {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.footer-nav ul,
.footer-notes ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-nav a,
.footer-notes a {
  font-size: 13.5px;
  color: var(--ink-soft);
}

.footer-nav a:hover,
.footer-notes a:hover {
  color: var(--accent);
}

.footer-bottom {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 18px 24px 28px;
  border-top: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.footer-bottom p {
  margin: 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

/* --------------------------------------------------------------------------
   components：通用按钮、标签、列表、FAQ、目录、相关推荐
   -------------------------------------------------------------------------- */
.btn-primary,
.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  font-size: 14.5px;
  border-radius: var(--radius);
  transition: background-color 160ms ease, color 160ms ease, border-color 160ms ease;
}

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

.btn-primary:hover {
  background: #cf4522;
  color: #fff;
}

.btn-outline {
  border: 1px solid var(--line);
  background: var(--bg-card);
  color: var(--ink);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.tag-chip {
  display: inline-block;
  padding: 1px 8px;
  font-size: 12px;
  color: var(--ink-soft);
  border: 1px solid var(--line);
  border-radius: 4px;
  background: var(--bg-page);
  white-space: nowrap;
}

.chip {
  display: inline-block;
  padding: 6px 14px;
  font-size: 13.5px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-card);
  color: var(--ink);
}

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

.related-links,
.related-bar {
  margin-top: 48px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.related-links h2,
.related-bar h2 {
  font-size: 17px;
  margin-bottom: 12px;
}

.related-links ul,
.related-bar ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
}

.related-links a,
.related-bar a {
  font-size: 14.5px;
  color: var(--accent);
}

.related-links a:hover,
.related-bar a:hover {
  text-decoration: underline;
}

/* 页内目录 */
.toc ul,
.page-toc ul {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.toc a,
.page-toc a {
  font-size: 13.5px;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--line);
  padding-bottom: 2px;
}

.toc a:hover,
.page-toc a:hover,
.toc a.is-active,
.page-toc a.is-active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

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

.faq-item summary {
  cursor: pointer;
  padding: 14px 18px;
  font-size: 15.5px;
  font-weight: 600;
  list-style: none;
}

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

.faq-item summary::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 600;
}

.faq-item[open] summary::after {
  content: "−";
}

.faq-answer {
  padding: 0 18px 16px;
  border-top: 1px solid var(--line);
}

.faq-answer p {
  margin: 12px 0 0;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.faq-answer a {
  color: var(--accent);
}

.faq-answer a:hover {
  text-decoration: underline;
}

/* 规则列表 */
.rule-list li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 10px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.rule-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

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

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */
.home-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 64px;
}

.hero {
  padding: 48px 0 56px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 520px minmax(0, 1fr);
  gap: 56px;
  align-items: start;
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-card);
}

.hero-visual figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.hero-kicker {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 10px;
}

.hero-timeline h1 {
  font-size: 34px;
  margin-bottom: 14px;
}

.hero-lead {
  font-size: 15.5px;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

.hero-subtitle {
  font-size: 17px;
  margin-bottom: 12px;
}

.timeline-list {
  border-top: 1px solid var(--line);
  margin-bottom: 22px;
}

.timeline-item {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
}

.timeline-item time {
  flex: 0 0 82px;
  font-size: 13px;
  color: var(--ink-soft);
}

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

.timeline-progress {
  margin-left: auto;
  font-size: 13px;
  color: var(--ink-soft);
}

.section {
  padding: 44px 0;
  border-top: 1px solid var(--line);
}

.section-head {
  margin-bottom: 26px;
}

.section-head h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.section-lead {
  font-size: 14.5px;
  color: var(--ink-soft);
  max-width: 780px;
  margin: 0;
}

/* 题材分区卡 */
.genre-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.genre-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  overflow: hidden;
  transition: transform 160ms ease, border-color 160ms ease;
}

.genre-card:hover {
  transform: translateY(-2px);
  border-color: var(--accent);
}

.genre-card a {
  display: block;
  padding: 0 0 16px;
}

.genre-card img {
  width: 100%;
  height: 168px;
  object-fit: cover;
  margin-bottom: 14px;
}

.genre-card h3 {
  font-size: 17px;
  margin: 0 18px 8px;
}

.genre-card p {
  margin: 0 18px 12px;
  font-size: 14px;
  color: var(--ink-soft);
}

.card-link {
  display: inline-block;
  margin: 0 18px;
  font-size: 13.5px;
  color: var(--accent);
}

.genre-card:hover .card-link {
  text-decoration: underline;
}

/* 榜单摘要 */
.ranking-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 40px;
}

.ranking-col {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 22px 22px 18px;
}

.ranking-col h3 {
  font-size: 17px;
  margin-bottom: 14px;
}

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

.rank-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
  font-size: 14.5px;
}

.rank-no {
  flex: 0 0 22px;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.rank-item img {
  width: 44px;
  height: 58px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
}

.rank-name {
  flex: 1 1 auto;
  min-width: 0;
  font-weight: 600;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.link-more {
  display: inline-block;
  margin-top: 14px;
  font-size: 13.5px;
  color: var(--accent);
}

.link-more:hover {
  text-decoration: underline;
}

/* 阅读流程速览 */
.flow-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 26px;
}

.flow-step {
  border-top: 2px solid var(--accent);
  padding-top: 14px;
}

.flow-no {
  display: block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 8px;
}

.flow-step h3 {
  font-size: 15.5px;
  margin-bottom: 8px;
}

.flow-step p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

/* 站内索引条 */
.site-index h2 {
  font-size: 22px;
  margin-bottom: 18px;
}

.index-links {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.index-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  font-size: 14.5px;
}

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

/* --------------------------------------------------------------------------
   pages：题材分类
   -------------------------------------------------------------------------- */
.genre-index {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 20px;
  position: sticky;
  top: 88px;
}

.genre-index h2 {
  font-size: 17px;
  margin-bottom: 8px;
}

.genre-index > p {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin: 0 0 14px;
}

.genre-index nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.genre-index nav a {
  display: block;
  padding: 8px 0;
  font-size: 14.5px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

.genre-index nav a:hover {
  color: var(--accent);
}

.genre-block {
  padding-bottom: 32px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--line);
}

.genre-block h2 {
  font-size: 22px;
  margin-bottom: 16px;
}

.genre-figure {
  margin-bottom: 18px;
}

.genre-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.genre-block > p {
  font-size: 15px;
  color: var(--ink-soft);
}

.genre-block h3 {
  font-size: 15.5px;
  margin: 20px 0 10px;
}

.genre-block ul {
  margin-bottom: 16px;
}

.genre-block ul li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.genre-block ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.genre-entry {
  margin: 0;
}

.genre-entry a {
  font-size: 14.5px;
  color: var(--accent);
}

.genre-entry a:hover {
  text-decoration: underline;
}

.tag-rule {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  margin-bottom: 8px;
}

.tag-rule h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.tag-rule > p {
  font-size: 15px;
  color: var(--ink-soft);
}

.tag-rule ul {
  margin-bottom: 16px;
}

.tag-rule ul li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.tag-rule ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

/* --------------------------------------------------------------------------
   pages：最近更新
   -------------------------------------------------------------------------- */
.layout-shell {
  align-items: start;
}

.update-list-section {
  margin-bottom: 44px;
}

.update-list-section h2,
.archive-section h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.section-intro {
  font-size: 14.5px;
  color: var(--ink-soft);
  max-width: 720px;
  margin-bottom: 20px;
}

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

.update-item {
  display: grid;
  grid-template-columns: 92px 64px minmax(0, 1fr) auto;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

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

.update-thumb {
  margin: 0;
}

.update-thumb img {
  width: 64px;
  height: 84px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
}

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

.update-body h3 {
  font-size: 15.5px;
  margin-bottom: 6px;
}

.update-body p {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-soft);
}

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

.update-progress {
  font-size: 13px;
  color: var(--ink-soft);
  white-space: nowrap;
}

.archive-section {
  margin-bottom: 8px;
}

.archive-figure {
  margin: 0 0 24px;
}

.archive-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.archive-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

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

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

.archive-group h3 {
  font-size: 15.5px;
  margin-bottom: 8px;
}

.archive-group p {
  font-size: 13.5px;
  color: var(--ink-soft);
  margin-bottom: 12px;
}

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

.archive-links a {
  font-size: 14px;
  color: var(--accent);
}

.archive-links a:hover {
  text-decoration: underline;
}

.side-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 20px;
  margin-bottom: 20px;
}

.side-block h2 {
  font-size: 17px;
  margin-bottom: 12px;
}

.side-faq .faq-item {
  margin-bottom: 10px;
}

.side-faq .faq-item summary {
  font-size: 14px;
  padding: 12px 14px;
}

.side-faq .faq-item p {
  font-size: 13.5px;
  padding: 0 14px 12px;
  margin: 0;
}

/* --------------------------------------------------------------------------
   pages：榜单
   -------------------------------------------------------------------------- */
.rank-boards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-bottom: 48px;
}

.rank-board {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 22px;
}

.rank-board-head {
  margin-bottom: 16px;
}

.rank-board-head h2 {
  font-size: 18px;
  margin-bottom: 6px;
}

.rank-board-head p {
  margin: 0;
  font-size: 13.5px;
  color: var(--ink-soft);
}

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

.rank-row {
  display: grid;
  grid-template-columns: 24px 48px minmax(0, 1fr);
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  border-bottom: 1px solid var(--line);
}

.rank-thumb {
  margin: 0;
}

.rank-thumb img {
  width: 48px;
  height: 64px;
  object-fit: cover;
  border-radius: 4px;
  border: 1px solid var(--line);
}

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

.rank-info h3 {
  font-size: 14.5px;
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-tags {
  margin: 0;
  font-size: 12.5px;
  color: var(--ink-soft);
}

.rank-board-foot {
  margin: 14px 0 0;
}

.rank-board-foot a {
  font-size: 13.5px;
  color: var(--accent);
}

.rank-board-foot a:hover {
  text-decoration: underline;
}

.stat-rule {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 26px;
  margin-bottom: 44px;
}

.stat-rule h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.stat-rule > p {
  font-size: 15px;
  color: var(--ink-soft);
}

.stat-rule .rule-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 6px 32px;
  margin: 18px 0;
}

.stat-rule-note {
  margin: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
  font-size: 13.5px;
  color: var(--ink-soft);
}

.rank-genre {
  margin-bottom: 8px;
}

.rank-genre h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.rank-genre > p {
  font-size: 14.5px;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

.genre-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

/* --------------------------------------------------------------------------
   pages：阅读指引
   -------------------------------------------------------------------------- */
.guide-toc {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 20px;
  position: sticky;
  top: 88px;
}

.guide-toc h2 {
  font-size: 17px;
  margin-bottom: 12px;
}

.guide-toc nav ul {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.guide-toc .toc-link {
  display: block;
  padding: 8px 0;
  font-size: 14.5px;
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line);
}

.guide-toc .toc-link:hover,
.guide-toc .toc-link.is-active {
  color: var(--accent);
}

.toc-note {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--ink-soft);
}

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

.guide-intro {
  margin-bottom: 36px;
}

.guide-intro h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.guide-intro p {
  font-size: 15px;
  color: var(--ink-soft);
}

.guide-figure {
  margin: 0;
}

.guide-figure img {
  width: 100%;
  height: 260px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.guide-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.step-section {
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.step-section h2 {
  display: flex;
  align-items: baseline;
  gap: 10px;
  font-size: 22px;
  margin-bottom: 12px;
}

.step-section .step-num {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.step-section > p {
  font-size: 15px;
  color: var(--ink-soft);
}

.step-notes {
  margin: 16px 0;
}

.step-notes li {
  position: relative;
  padding-left: 16px;
  margin-bottom: 8px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.step-notes li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.step-link {
  margin: 0;
}

.step-link a {
  font-size: 14.5px;
  color: var(--accent);
}

.step-link a:hover {
  text-decoration: underline;
}

.compare-section {
  padding-bottom: 28px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line);
}

.compare-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.compare-section > p {
  font-size: 15px;
  color: var(--ink-soft);
}

.compare-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 18px;
}

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

.compare-col h3 {
  font-size: 15.5px;
  margin-bottom: 12px;
}

.compare-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.compare-col li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.compare-col li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.stuck-section {
  margin-bottom: 8px;
}

.stuck-section h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.stuck-section > p {
  font-size: 15px;
  color: var(--ink-soft);
}

.stuck-table {
  margin-top: 18px;
  background: var(--bg-card);
  border: 1px solid var(--line);
}

.stuck-table caption {
  padding: 12px;
  font-size: 13px;
  color: var(--ink-soft);
  text-align: left;
  caption-side: top;
}

.stuck-table th,
.stuck-table td {
  padding: 12px 16px;
  font-size: 14.5px;
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.stuck-table th {
  font-weight: 600;
  background: var(--bg-page);
}

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

.stuck-table td a {
  color: var(--accent);
}

.stuck-table tbody tr:last-child td {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   pages：常见问题
   -------------------------------------------------------------------------- */
.page-head-text {
  min-width: 0;
}

.page-head-figure {
  margin: 20px 0 0;
}

.page-head-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.page-head-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.faq-catbar {
  margin-bottom: 36px;
}

.faq-catbar ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.faq-catbar a {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--bg-card);
}

.faq-catbar a:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.faq-shell {
  max-width: 880px;
}

.faq-group {
  margin-bottom: 40px;
}

.faq-group h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.faq-group-note {
  font-size: 14px;
  color: var(--ink-soft);
  margin-bottom: 18px;
}

/* --------------------------------------------------------------------------
   pages：纠错反馈
   -------------------------------------------------------------------------- */
.feedback-types {
  margin-bottom: 44px;
}

.feedback-types h2,
.feedback-detail h2,
.feedback-flow h2 {
  font-size: 22px;
  margin-bottom: 10px;
}

.feedback-types > p,
.feedback-detail > p,
.feedback-flow > p {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 760px;
}

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

.feedback-type-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 20px;
}

.feedback-type-card h3 {
  font-size: 15.5px;
  margin-bottom: 8px;
}

.feedback-type-card p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.feedback-detail {
  margin-bottom: 44px;
}

.feedback-detail-block {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 20px;
  margin-top: 18px;
}

.feedback-detail-block h3 {
  font-size: 15.5px;
  margin-bottom: 10px;
}

.feedback-detail-block ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.feedback-detail-block li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  color: var(--ink-soft);
}

.feedback-detail-block li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 5px;
  height: 5px;
  background: var(--accent);
  border-radius: 50%;
}

.feedback-flow {
  margin-bottom: 8px;
}

.feedback-flow-figure {
  margin: 20px 0 24px;
}

.feedback-flow-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.feedback-flow-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-soft);
}

.feedback-flow-steps {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  margin-bottom: 28px;
}

.feedback-flow-steps li {
  border-top: 2px solid var(--accent);
  padding-top: 14px;
}

.feedback-flow-steps h3 {
  font-size: 15.5px;
  margin-bottom: 8px;
}

.feedback-flow-steps p {
  margin: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.feedback-result-links {
  border-top: 1px solid var(--line);
  padding-top: 18px;
}

.feedback-result-links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 28px;
}

.feedback-result-links a {
  font-size: 14.5px;
  color: var(--accent);
}

.feedback-result-links a:hover {
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   pages：404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 72px 24px 96px;
}

.error-inner {
  max-width: 640px;
}

.error-code {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 12px;
}

.error-inner h1 {
  font-size: 34px;
  margin-bottom: 14px;
}

.error-lead {
  font-size: 15.5px;
  color: var(--ink-soft);
  margin-bottom: 24px;
}

.error-paths {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-bottom: 28px;
}

.error-paths a {
  font-size: 14.5px;
  color: var(--accent);
}

.error-paths a:hover {
  text-decoration: underline;
}

.error-home {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  background: var(--accent);
  color: #fff;
  font-size: 14.5px;
  border-radius: var(--radius);
}

.error-home:hover {
  background: #cf4522;
  color: #fff;
}

/* --------------------------------------------------------------------------
   responsive：1200 / 1024 / 768 / 480
   -------------------------------------------------------------------------- */
@media (max-width: 1200px) {
  .hero-inner {
    grid-template-columns: 440px minmax(0, 1fr);
    gap: 40px;
  }

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

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .hero-visual img {
    height: 320px;
  }

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

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

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

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 20px;
    gap: 12px;
  }

  .main-nav {
    display: none;
  }

  .header-action {
    margin-left: auto;
  }

  .nav-toggle {
    display: block;
  }

  .mobile-nav {
    display: block;
    background: var(--bg-page);
    border-top: 1px solid var(--line);
  }

  .mobile-nav[hidden] {
    display: none;
  }

  .mobile-nav ul {
    display: flex;
    flex-direction: column;
    padding: 8px 20px 20px;
  }

  .mobile-nav a {
    display: flex;
    align-items: center;
    min-height: 48px;
    font-size: 15.5px;
    color: var(--ink);
    border-bottom: 1px solid var(--line);
  }

  .mobile-nav a.is-active {
    color: var(--accent);
    font-weight: 600;
  }

  .inner-main,
  .home-main {
    padding-left: 20px;
    padding-right: 20px;
  }

  .page-title,
  .hero-timeline h1,
  .error-inner h1 {
    font-size: 26px;
  }

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

  .page-layout.sidebar-left .content-main,
  .page-layout.sidebar-left .guide-body {
    order: 1;
  }

  .page-layout.sidebar-left .genre-index,
  .page-layout.sidebar-left .guide-toc {
    order: 2;
    position: static;
  }

  .genre-grid,
  .ranking-columns,
  .archive-groups,
  .rank-boards,
  .compare-grid,
  .feedback-type-grid,
  .feedback-flow-steps {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

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

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

  .update-date {
    grid-column: 1 / -1;
  }

  .update-progress {
    grid-column: 2;
    justify-self: start;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 20px 24px;
  }

  .footer-bottom {
    padding: 16px 20px 24px;
  }
}

@media (max-width: 480px) {
  .header-inner {
    padding: 0 16px;
  }

  .brand {
    font-size: 15.5px;
  }

  .header-action {
    height: 34px;
    padding: 0 12px;
    font-size: 13px;
  }

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

  .hero {
    padding: 32px 0 40px;
  }

  .hero-visual img {
    height: 220px;
  }

  .timeline-item time {
    flex: 0 0 72px;
  }

  .timeline-progress {
    margin-left: 0;
    flex: 1 1 100%;
  }

  .genre-card img {
    height: 150px;
  }

  .archive-figure img,
  .guide-figure img,
  .feedback-flow-figure img,
  .page-head-figure img,
  .genre-figure img {
    height: 190px;
  }

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

  .stuck-table th,
  .stuck-table td {
    padding: 10px 12px;
    font-size: 13.5px;
  }

  .footer-inner {
    padding: 32px 16px 20px;
  }

  .footer-bottom {
    padding: 14px 16px 22px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .genre-card:hover {
    transform: none;
  }
}