/* =========================================================
   尾巴漫画网站 · 全站样式
   base / layout / components / pages / responsive
   ========================================================= */

/* ---------------------------------------------------------
   1. base
   --------------------------------------------------------- */
:root {
  --paper: #FAF9F6;
  --ink: #17161A;
  --ink-soft: #43414A;
  --vermilion: #C8382C;
  --line: #9A978F;
  --line-light: #DEDBD4;
  --muted-bg: #EFEDE7;
  --tint-bg: #F3E4E1;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", "Menlo", "Consolas", "Liberation Mono", "Courier New", monospace;
  --wrap: 1120px;
  --wrap-narrow: 960px;
  --wrap-text: 720px;
  --radius: 6px;
  --gap-section: 64px;
}

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

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

body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.85;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  line-height: 1.35;
}

p {
  margin: 0 0 18px;
}

p:last-child {
  margin-bottom: 0;
}

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

a {
  color: var(--ink);
  text-decoration: none;
  transition: color 0.15s ease;
}

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

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 8px;
  color: var(--line);
  font-size: 13px;
  line-height: 1.7;
}

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

strong {
  font-weight: 700;
}

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

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0 0 0 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

/* ---------------------------------------------------------
   2. layout · 页头 / 导航 / 抽屉
   --------------------------------------------------------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background: var(--paper);
  border-bottom: 1px solid var(--line-light);
}

.site-nav {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  width: 100%;
  max-width: var(--wrap);
  height: 72px;
  margin: 0 auto;
  padding: 0 24px;
}

.brand {
  flex: 0 0 auto;
  order: 2;
  color: var(--ink);
  font-size: 19px;
  font-weight: 700;
  line-height: 1.2;
  white-space: nowrap;
}

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

.nav-list {
  display: flex;
  align-items: center;
  gap: 26px;
}

.nav-list-left {
  order: 1;
}

.nav-list-right {
  order: 3;
}

.nav-list li {
  display: flex;
}

.nav-list a {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: 15px;
  color: var(--ink-soft);
  white-space: nowrap;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 12px;
  height: 2px;
  background: transparent;
  transition: background-color 0.15s ease;
}

.nav-list a:hover {
  color: var(--vermilion);
}

.nav-list a.is-current {
  color: var(--ink);
  font-weight: 700;
}

.nav-list a.is-current::after {
  background: var(--vermilion);
}

.nav-toggle {
  display: none;
  order: 1;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--ink);
  transition: transform 0.18s ease, opacity 0.18s ease;
}

.nav-drawer {
  border-top: 1px solid var(--line-light);
  background: var(--paper);
}

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

.drawer-list {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px 20px;
}

.drawer-list li {
  border-bottom: 1px solid var(--line-light);
}

.drawer-list li:last-child {
  border-bottom: 0;
}

.drawer-list a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 16px;
  color: var(--ink);
}

.drawer-list a.is-current {
  color: var(--vermilion);
  font-weight: 700;
}

.drawer-list a.is-current::before {
  content: "";
  width: 6px;
  height: 6px;
  margin-right: 10px;
  border-radius: 50%;
  background: var(--vermilion);
}

/* ---------------------------------------------------------
   3. layout · 主体容器 / 页脚
   --------------------------------------------------------- */
.site-main {
  display: block;
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px;
}

.inner-main {
  max-width: var(--wrap);
  padding-top: 28px;
  padding-bottom: 72px;
}

.home-main {
  padding-bottom: 72px;
}

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

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 24px 28px;
}

.footer-summary {
  max-width: 640px;
  margin-bottom: 32px;
  color: var(--ink-soft);
  font-size: 15px;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 32px;
  padding-bottom: 28px;
  border-bottom: 1px solid var(--line-light);
}

.footer-col-title {
  margin-bottom: 14px;
  color: var(--vermilion);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  color: var(--ink-soft);
  font-size: 14px;
}

.footer-col a:hover {
  color: var(--vermilion);
}

.footer-note {
  margin: 20px 0 0;
  color: var(--line);
  font-size: 13px;
  line-height: 1.8;
}

/* ---------------------------------------------------------
   4. components · 面包屑 / 页面标题区 / 区块标题
   --------------------------------------------------------- */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 18px;
  color: var(--line);
  font-size: 13px;
  line-height: 1.6;
}

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

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

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

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

.page-header {
  padding-bottom: 22px;
  border-bottom: 2px solid var(--vermilion);
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  line-height: 1.35;
}

.page-description,
.page-lead,
.page-title-desc,
.page-hero-desc {
  margin: 12px 0 0;
  max-width: var(--wrap-text);
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.section-head {
  margin-bottom: 24px;
}

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

.section-desc {
  margin: 8px 0 0;
  max-width: var(--wrap-text);
  color: var(--line);
  font-size: 14px;
}

.section-foot {
  margin: 22px 0 0;
  font-size: 14px;
}

.section-foot a {
  color: var(--vermilion);
  font-weight: 700;
}

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

.section-note,
.section-intro {
  margin: 8px 0 0;
  max-width: var(--wrap-text);
  color: var(--line);
  font-size: 14px;
  line-height: 1.8;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 18px;
  margin-top: 48px;
  padding-top: 22px;
  border-top: 1px solid var(--line-light);
  font-size: 14px;
}

.related-links-label {
  color: var(--line);
}

.related-links-item {
  color: var(--ink-soft);
  border-bottom: 1px solid var(--line-light);
}

.related-links-item:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

/* ---------------------------------------------------------
   5. components · 通用按钮 / 封面卡 / 标签条 / 章节导航
   --------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
}

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

.btn-primary:hover {
  background: #A62C22;
  color: #fff;
}

.btn-ghost {
  border: 1px solid var(--ink);
  color: var(--ink);
}

.btn-ghost:hover {
  border-color: var(--vermilion);
  color: var(--vermilion);
}

.tag-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  min-height: 44px;
}

.tag-btn {
  min-height: 36px;
  padding: 0 16px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: 14px;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.tag-btn:hover {
  border-color: var(--vermilion);
  color: var(--vermilion);
}

.tag-btn.is-active {
  background: var(--tint-bg);
  border-color: var(--vermilion);
  color: var(--vermilion);
  font-weight: 700;
}

.cover-grid,
.cover-wall {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 26px;
}

.cover-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: #fff;
  overflow: hidden;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

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

.cover-figure,
.cover-media {
  margin: 0;
  aspect-ratio: 3 / 4;
  background: var(--muted-bg);
  overflow: hidden;
}

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

.cover-body {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 14px 16px 16px;
}

.cover-title,
.cover-name {
  font-size: 17px;
  line-height: 1.4;
}

.cover-genre,
.cover-tag {
  margin: 0;
  color: var(--vermilion);
  font-size: 13px;
  font-weight: 700;
}

.cover-meta {
  margin: 0;
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.7;
}

.nav-demo,
.nav-demo-row {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 20px;
}

.nav-demo-item {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.nav-demo-button,
.nav-demo-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  border: 1px solid var(--ink);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
}

.nav-demo-label {
  margin: 0;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--vermilion);
}

.nav-demo-text {
  margin: 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.75;
}

/* ---------------------------------------------------------
   6. pages · 首页
   --------------------------------------------------------- */
.hero {
  display: grid;
  grid-template-columns: 55fr 45fr;
  gap: 48px;
  align-items: start;
  padding: 56px 0 40px;
  border-bottom: 1px solid var(--line-light);
}

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

.hero-kicker {
  margin: 0 0 14px;
  color: var(--vermilion);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.hero-text h1 {
  margin: 0 0 18px;
  font-size: 40px;
  line-height: 1.25;
}

.hero-lead {
  max-width: 560px;
  margin: 0 0 26px;
  color: var(--ink-soft);
  font-size: 16px;
  line-height: 1.85;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-visual {
  margin: 0;
}

.hero-visual img {
  width: 100%;
  aspect-ratio: 4 / 5;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--muted-bg);
}

.hero-hint {
  grid-column: 1 / -1;
  margin: 0;
  padding-top: 18px;
  border-top: 1px solid var(--line-light);
  color: var(--line);
  font-size: 13px;
}

.week-schedule,
.cover-wall,
.genre-notes,
.ranking,
.guide-trio {
  padding: var(--gap-section) 0 0;
}

.schedule-strip {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  gap: 1px;
  background: var(--line-light);
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  overflow: hidden;
}

.schedule-cell {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-height: 168px;
  padding: 14px 12px;
  background: var(--muted-bg);
}

.schedule-day {
  color: var(--vermilion);
  font-size: 13px;
  font-weight: 700;
  font-family: var(--font-mono);
}

.schedule-item {
  color: var(--ink);
  font-size: 14px;
  line-height: 1.6;
}

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

.genre-row {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr) 200px;
  gap: 20px;
  align-items: baseline;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-light);
}

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

.genre-desc {
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.75;
}

.genre-fit {
  color: var(--line);
  font-size: 13px;
  line-height: 1.7;
}

.ranking-list {
  display: flex;
  flex-direction: column;
  border-top: 2px solid var(--ink);
}

.ranking-row {
  display: grid;
  grid-template-columns: 48px 160px 110px 130px minmax(0, 1fr);
  gap: 16px;
  align-items: center;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-light);
}

.ranking-no {
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
}

.ranking-name {
  font-size: 16px;
  font-weight: 700;
}

.ranking-genre {
  color: var(--vermilion);
  font-size: 13px;
  font-weight: 700;
}

.ranking-count {
  color: var(--ink-soft);
  font-family: var(--font-mono);
  font-size: 14px;
}

.ranking-note {
  color: var(--line);
  font-size: 14px;
  line-height: 1.7;
}

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

.guide-block h3 {
  margin-bottom: 10px;
  font-size: 17px;
}

.guide-block p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.feedback-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-top: var(--gap-section);
  padding: 24px 0;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.feedback-text {
  margin: 0;
  max-width: 620px;
  color: var(--ink-soft);
  font-size: 15px;
}

.feedback-link {
  color: var(--vermilion);
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
}

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

/* ---------------------------------------------------------
   7. pages · 更新日历
   --------------------------------------------------------- */
.page-banner {
  margin: 26px 0 0;
}

.page-banner img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--muted-bg);
}

.week-schedule > h2 {
  font-size: 22px;
}

.schedule-list {
  display: flex;
  flex-direction: column;
  margin-top: 24px;
  border-top: 2px solid var(--ink);
}

.schedule-row {
  display: grid;
  grid-template-columns: 160px minmax(0, 1fr);
  gap: 24px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-light);
}

.schedule-row .schedule-day {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.day-name {
  color: var(--ink);
  font-size: 17px;
  font-weight: 700;
}

.day-date {
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
}

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

.schedule-entry {
  min-width: 0;
}

.entry-title {
  margin-bottom: 4px;
  font-size: 16px;
}

.entry-meta {
  margin: 0;
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
}

.entry-chapter {
  color: var(--vermilion);
}

.entry-status {
  color: var(--ink-soft);
}

.status-notes {
  padding-top: var(--gap-section);
}

.status-notes > h2 {
  font-size: 22px;
}

.status-group {
  padding: 20px 0;
  border-bottom: 1px solid var(--line-light);
}

.status-name {
  margin-bottom: 8px;
  font-size: 17px;
}

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

.status-group p a {
  color: var(--vermilion);
}

.status-points {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin-top: 12px;
}

.status-points li {
  position: relative;
  padding-left: 16px;
  color: var(--line);
  font-size: 14px;
  line-height: 1.75;
}

.status-points li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background: var(--vermilion);
}

.division-note {
  padding-top: var(--gap-section);
}

.division-note > h2 {
  margin-bottom: 14px;
  font-size: 22px;
}

.division-note p {
  max-width: var(--wrap-text);
  color: var(--ink-soft);
  font-size: 15px;
}

.division-link a {
  color: var(--vermilion);
  font-weight: 700;
}

/* ---------------------------------------------------------
   8. pages · 作品目录
   --------------------------------------------------------- */
.catalog-filter {
  padding-top: 32px;
}

.catalog-filter > h2,
.catalog-groups > h2,
.catalog-guide > h2 {
  font-size: 22px;
}

.catalog-groups,
.catalog-guide {
  padding-top: var(--gap-section);
}

.group-block {
  padding: 22px 0;
  border-bottom: 1px solid var(--line-light);
}

.group-title {
  margin-bottom: 12px;
  font-size: 17px;
}

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

.group-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 120px 130px;
  gap: 16px;
  align-items: baseline;
  padding: 10px 0;
  border-top: 1px solid var(--line-light);
}

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

.work-state {
  color: var(--vermilion);
  font-size: 13px;
}

.work-chapter {
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
}

.guide-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
  margin-top: 22px;
}

.guide-item h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.guide-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.section-more {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  margin-top: 26px;
  font-size: 14px;
}

.section-more a {
  color: var(--vermilion);
  border-bottom: 1px solid var(--line-light);
}

.section-more a:hover {
  border-bottom-color: var(--vermilion);
}

/* ---------------------------------------------------------
   9. pages · 最近章节
   --------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 40px;
  align-items: start;
  padding-top: 28px;
}

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

.content-main .breadcrumb {
  margin-bottom: 14px;
}

.chapter-timeline {
  padding-top: 32px;
}

.chapter-timeline > h2,
.chapter-nav-usage > h2 {
  font-size: 22px;
}

.timeline-list {
  display: flex;
  flex-direction: column;
  margin-top: 22px;
  border-top: 2px solid var(--ink);
}

.timeline-item {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 8px 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line-light);
}

.timeline-figure {
  grid-row: span 2;
  width: 150px;
  aspect-ratio: 3 / 4;
  margin: 0;
  border-radius: var(--radius);
  background: var(--muted-bg);
  overflow: hidden;
}

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

.timeline-meta {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-self: center;
}

.timeline-date {
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
}

.timeline-time {
  color: var(--line);
  font-family: var(--font-mono);
  font-size: 13px;
}

.timeline-body {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-self: center;
}

.timeline-work {
  font-size: 16px;
  font-weight: 700;
}

.timeline-chapter {
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: 14px;
}

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

.chapter-nav-usage {
  padding-top: var(--gap-section);
}

.chapter-nav-tip {
  margin-top: 22px;
  font-size: 14px;
  color: var(--ink-soft);
}

.chapter-nav-tip a {
  color: var(--vermilion);
  font-weight: 700;
}

.content-side {
  position: sticky;
  top: 96px;
  padding: 22px 20px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: var(--muted-bg);
}

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

.content-side p {
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.8;
}

.content-side p a {
  color: var(--vermilion);
}

.rhythm-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 14px;
  padding-top: 14px;
  border-top: 1px solid var(--line-light);
}

.rhythm-list li {
  position: relative;
  padding-left: 16px;
  color: var(--line);
  font-size: 13px;
  line-height: 1.75;
}

.rhythm-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  background: var(--vermilion);
}

/* ---------------------------------------------------------
   10. pages · 题材分类
   --------------------------------------------------------- */
.sidebar-left .page-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 40px;
  align-items: start;
  padding-top: 28px;
}

.genre-index {
  position: sticky;
  top: 96px;
  padding: 20px 18px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: var(--muted-bg);
}

.genre-index-title {
  margin-bottom: 12px;
  color: var(--vermilion);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
}

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

.genre-index-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  padding: 0 8px;
  border-radius: var(--radius);
  color: var(--ink-soft);
  font-size: 15px;
}

.genre-index-list a:hover {
  background: var(--tint-bg);
  color: var(--vermilion);
}

.genre-index-note {
  margin: 14px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line-light);
  color: var(--line);
  font-size: 13px;
  line-height: 1.7;
}

.genre-index-note a {
  color: var(--vermilion);
}

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

.genre-section {
  padding: 0 0 26px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--line-light);
  scroll-margin-top: 96px;
}

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

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

.genre-section p {
  max-width: var(--wrap-text);
  color: var(--ink-soft);
  font-size: 15px;
}

.genre-figure {
  margin: 18px 0 0;
  max-width: 520px;
}

.genre-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--muted-bg);
}

.genre-pick {
  padding-top: 32px;
}

.genre-pick h2 {
  margin-bottom: 14px;
  font-size: 22px;
}

.genre-pick p {
  max-width: var(--wrap-text);
  color: var(--ink-soft);
  font-size: 15px;
}

/* ---------------------------------------------------------
   11. pages · 追更与收藏说明
   --------------------------------------------------------- */
.article-shell {
  max-width: 760px;
  padding-top: 32px;
}

.guide-section {
  padding-bottom: 30px;
  margin-bottom: 30px;
  border-bottom: 1px solid var(--line-light);
  scroll-margin-top: 96px;
}

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

.guide-section h2 {
  margin-bottom: 14px;
  font-size: 22px;
}

.guide-section p {
  color: var(--ink-soft);
  font-size: 16px;
}

.challenge-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.challenge-list h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.challenge-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.step-list {
  display: flex;
  flex-direction: column;
  gap: 22px;
  margin-top: 22px;
  counter-reset: guide-step;
}

.step-list li {
  position: relative;
  padding-left: 52px;
  counter-increment: guide-step;
}

.step-list li::before {
  content: counter(guide-step, decimal-leading-zero);
  position: absolute;
  left: 0;
  top: 2px;
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
}

.step-list h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.step-list p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.guide-figure {
  margin: 26px 0 0;
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--muted-bg);
}

.chapter-nav-demo {
  margin-top: 26px;
  padding: 22px 20px;
  border: 1px solid var(--line-light);
  border-radius: var(--radius);
  background: var(--muted-bg);
}

.chapter-nav-demo > h3 {
  margin-bottom: 10px;
  font-size: 17px;
}

.feedback-strip {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  margin-top: 40px;
  padding: 22px 0;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.feedback-strip-text {
  margin: 0;
  max-width: 560px;
  color: var(--ink-soft);
  font-size: 15px;
}

.feedback-strip-link {
  color: var(--vermilion);
  font-weight: 700;
  white-space: nowrap;
}

.feedback-strip-link:hover {
  color: var(--ink);
}

/* ---------------------------------------------------------
   12. pages · 问题反馈
   --------------------------------------------------------- */
.feedback-types {
  padding-top: 32px;
}

.feedback-types > h2,
.feedback-howto > h2,
.feedback-faq > h2,
.related-links > h2 {
  font-size: 22px;
}

.feedback-figure {
  margin: 22px 0 0;
}

.feedback-figure img {
  width: 100%;
  aspect-ratio: 21 / 9;
  object-fit: cover;
  border-radius: var(--radius);
  background: var(--muted-bg);
}

.type-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px 32px;
  margin-top: 26px;
}

.type-item h3 {
  margin-bottom: 6px;
  font-size: 17px;
}

.type-item p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.8;
}

.feedback-howto {
  padding-top: var(--gap-section);
}

.howto-steps {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 24px;
  border-top: 2px solid var(--ink);
  padding-top: 22px;
}

.howto-step {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr);
  gap: 4px 16px;
}

.howto-step .step-index {
  grid-row: span 2;
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  line-height: 1.4;
}

.howto-step h3 {
  font-size: 17px;
}

.howto-step p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
}

.feedback-faq {
  padding-top: var(--gap-section);
}

.faq-list {
  display: flex;
  flex-direction: column;
  margin-top: 24px;
  border-top: 2px solid var(--ink);
}

.faq-item {
  border-bottom: 1px solid var(--line-light);
}

.faq-item summary {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 12px 30px 12px 0;
  position: relative;
  font-size: 16px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  content: "";
  position: absolute;
  right: 8px;
  top: 50%;
  width: 9px;
  height: 9px;
  margin-top: -6px;
  border-right: 2px solid var(--vermilion);
  border-bottom: 2px solid var(--vermilion);
  transform: rotate(45deg);
  transition: transform 0.18s ease;
}

.faq-item[open] summary::after {
  transform: rotate(-135deg);
}

.faq-item p {
  padding: 0 30px 18px 0;
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 1.85;
}

.related-links > h2 {
  margin-bottom: 14px;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px 24px;
}

.related-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  color: var(--ink-soft);
  font-size: 15px;
  border-bottom: 1px solid var(--line-light);
}

.related-list a:hover {
  color: var(--vermilion);
  border-bottom-color: var(--vermilion);
}

/* ---------------------------------------------------------
   13. pages · 404
   --------------------------------------------------------- */
.error-main {
  padding-top: 72px;
  padding-bottom: 88px;
}

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

.error-code {
  margin: 0 0 8px;
  color: var(--vermilion);
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.error-block h1 {
  margin-bottom: 14px;
  font-size: 30px;
}

.error-desc {
  margin-bottom: 26px;
  color: var(--ink-soft);
  font-size: 16px;
}

.error-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  padding: 20px 0;
  border-top: 1px solid var(--line-light);
  border-bottom: 1px solid var(--line-light);
}

.error-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--ink-soft);
  font-size: 15px;
}

.error-links a:hover {
  color: var(--vermilion);
}

.error-action {
  margin: 26px 0 0;
}

.error-home {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: var(--radius);
  background: var(--vermilion);
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.error-home:hover {
  background: #A62C22;
  color: #fff;
}

.error-note {
  margin: 18px 0 0;
  color: var(--line);
  font-size: 14px;
}

.error-note a {
  color: var(--vermilion);
}

/* ---------------------------------------------------------
   14. responsive · 900px
   --------------------------------------------------------- */
@media (max-width: 900px) {
  .site-nav {
    padding: 0 20px;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    padding: 8px 20px 18px;
    background: var(--paper);
    border-top: 1px solid var(--line-light);
    border-bottom: 1px solid var(--line-light);
    box-shadow: 0 12px 24px rgba(23, 22, 26, 0.08);
  }

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

  .nav-list-left,
  .nav-list-right {
    order: 0;
  }

  .nav-list li {
    border-bottom: 1px solid var(--line-light);
  }

  .nav-list li:last-child {
    border-bottom: 0;
  }

  .nav-list a {
    min-height: 48px;
    font-size: 16px;
  }

  .nav-list a::after {
    display: none;
  }

  .nav-list a.is-current {
    color: var(--vermilion);
  }

  .nav-toggle {
    display: flex;
  }

  .site-main {
    padding: 0 20px;
  }

  .inner-main,
  .home-main {
    padding-bottom: 56px;
  }

  .footer-inner {
    padding: 36px 20px 24px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 36px 0 32px;
  }

  .hero-text h1 {
    font-size: 30px;
  }

  .hero-visual img {
    aspect-ratio: 16 / 10;
  }

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

  .schedule-cell {
    min-height: 0;
  }

  .genre-row {
    grid-template-columns: 120px minmax(0, 1fr);
    gap: 6px 16px;
  }

  .genre-fit {
    grid-column: 2 / 3;
  }

  .ranking-row {
    grid-template-columns: 40px minmax(0, 1fr) 110px;
    gap: 6px 14px;
  }

  .ranking-genre {
    grid-column: 2 / 3;
  }

  .ranking-count {
    grid-column: 3 / 4;
    grid-row: 1 / 2;
    text-align: right;
  }

  .ranking-note {
    grid-column: 2 / 4;
  }

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

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

  .content-side,
  .genre-index {
    position: static;
  }

  .genre-index-list {
    flex-direction: row;
    flex-wrap: wrap;
    gap: 8px;
  }

  .genre-index-list li {
    flex: 0 0 auto;
  }

  .genre-index-list a {
    min-height: 40px;
    padding: 0 12px;
    border: 1px solid var(--line-light);
    background: #fff;
  }

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

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

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

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

/* ---------------------------------------------------------
   15. responsive · 600px
   --------------------------------------------------------- */
@media (max-width: 600px) {
  .site-nav {
    padding: 0 16px;
  }

  .site-main {
    padding: 0 16px;
  }

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

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

  .brand {
    font-size: 17px;
  }

  .hero {
    padding: 28px 0 26px;
  }

  .hero-text h1 {
    font-size: 24px;
  }

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

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .page-title,
  .error-block h1 {
    font-size: 24px;
  }

  .section-head h2,
  .week-schedule > h2,
  .status-notes > h2,
  .division-note > h2,
  .catalog-filter > h2,
  .catalog-groups > h2,
  .catalog-guide > h2,
  .chapter-timeline > h2,
  .chapter-nav-usage > h2,
  .genre-section h2,
  .genre-pick h2,
  .guide-section h2,
  .feedback-types > h2,
  .feedback-howto > h2,
  .feedback-faq > h2,
  .related-links > h2 {
    font-size: 20px;
  }

  .cover-grid,
  .cover-wall {
    gap: 16px;
  }

  .cover-body {
    padding: 12px 12px 14px;
  }

  .cover-title,
  .cover-name {
    font-size: 15px;
  }

  .tag-bar {
    flex-wrap: nowrap;
    overflow-x: auto;
    padding-bottom: 6px;
    -webkit-overflow-scrolling: touch;
  }

  .tag-btn {
    flex: 0 0 auto;
  }

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

  .genre-fit {
    grid-column: 1 / 2;
  }

  .ranking-row {
    grid-template-columns: 34px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .ranking-genre,
  .ranking-count,
  .ranking-note {
    grid-column: 2 / 3;
    text-align: left;
  }

  .ranking-count {
    grid-row: auto;
  }

  .ranking-no {
    font-size: 17px;
  }

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

  .timeline-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
  }

  .timeline-figure {
    grid-row: auto;
    width: 100%;
    aspect-ratio: 16 / 9;
  }

  .timeline-meta {
    flex-direction: row;
    gap: 12px;
  }

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

  .howto-step {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .step-list li {
    padding-left: 42px;
  }

  .feedback-bar,
  .feedback-strip {
    flex-direction: column;
    align-items: flex-start;
  }

  .chapter-nav-demo {
    padding: 18px 14px;
  }
}