/* ==========================================================================
   91漫画永久免费观看 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 基础重置与全局排版
   -------------------------------------------------------------------------- */

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

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

body {
  margin: 0;
  background-color: #f5f6f8;
  color: #1f2933;
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: #1f2933;
}

p {
  margin: 0;
}

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

figure {
  margin: 0;
}

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

a {
  color: #1b5fb0;
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

strong {
  font-weight: 600;
}

button {
  font: inherit;
  color: inherit;
  cursor: pointer;
}

/* 等宽数字：编号、章节区间、篇幅数字 */
.update-no,
.update-index,
.index-num,
.index-no,
.volume-no,
.update-chapter,
.update-range,
.index-range,
.chapter-range,
.page-meta,
.topic-no,
.error-code {
  font-variant-numeric: tabular-nums;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

/* --------------------------------------------------------------------------
   layout · 全站骨架（header / nav / main / breadcrumb / page-header / footer）
   -------------------------------------------------------------------------- */

.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background-color: #f5f6f8;
  color: #1f2933;
}

/* 页头 --------------------------------------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: #ffffff;
  border-bottom: 1px solid #dde2e8;
}

.header-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 20px;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 20px;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  margin-right: auto;
  color: #1f2933;
}

.brand:hover {
  text-decoration: none;
}

.brand-name {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.3;
  color: #1f2933;
}

.brand-slogan {
  font-size: 12px;
  line-height: 1.4;
  color: #6b7280;
}

/* 主导航 ------------------------------------------------------------- */

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 2px;
}

.nav-link {
  display: inline-block;
  padding: 8px 11px;
  border-radius: 6px;
  font-size: 15px;
  line-height: 1.4;
  color: #1f2933;
}

.nav-link:hover {
  background-color: #eef3fa;
  color: #1b5fb0;
  text-decoration: none;
}

.nav-link.is-current {
  background-color: #eef3fa;
  color: #1b5fb0;
  font-weight: 600;
}

/* 汉堡按钮（桌面隐藏） ----------------------------------------------- */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 11px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 6px;
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: #1f2933;
  border-radius: 1px;
}

/* 主内容容器 --------------------------------------------------------- */

.site-main {
  flex: 1 0 auto;
  width: 100%;
  margin: 0 auto;
}

.home-main {
  max-width: 1100px;
  padding: 0 20px 56px;
}

.inner-main {
  max-width: 1100px;
  padding: 0 20px 56px;
}

/* 面包屑 ------------------------------------------------------------- */

.breadcrumb {
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 16px 20px 0;
  font-size: 13px;
  color: #6b7280;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.breadcrumb-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #6b7280;
}

.breadcrumb-item + .breadcrumb-item::before {
  content: "/";
  color: #dde2e8;
}

.breadcrumb-item a {
  color: #6b7280;
}

.breadcrumb-item a:hover {
  color: #1b5fb0;
}

.breadcrumb-sep {
  color: #dde2e8;
}

.breadcrumb-current {
  color: #1f2933;
}

.inner-main > .breadcrumb {
  max-width: none;
  margin: 0;
  padding: 16px 0 0;
}

/* 页面标题区 --------------------------------------------------------- */

.page-header {
  padding: 10px 0 0;
}

.page-title,
.page-header .page-title {
  font-size: 28px;
  font-weight: 600;
  line-height: 1.35;
  color: #1f2933;
}

.page-title {
  margin: 0;
}

.page-lead,
.page-lede {
  margin-top: 10px;
  max-width: 720px;
  font-size: 16px;
  line-height: 1.75;
  color: #1f2933;
}

.page-meta {
  margin-top: 8px;
  font-size: 13px;
  color: #6b7280;
}

/* 页脚 --------------------------------------------------------------- */

.site-footer {
  flex: 0 0 auto;
  background-color: #ffffff;
  border-top: 1px solid #dde2e8;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1.6fr 1fr;
  gap: 28px;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 32px 20px 28px;
}

.footer-col {
  min-width: 0;
}

.footer-title {
  margin: 0 0 12px;
  font-size: 14px;
  font-weight: 600;
  color: #1f2933;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 6px 16px;
}

.footer-links a {
  font-size: 14px;
  line-height: 1.6;
  color: #1b5fb0;
}

.footer-text {
  font-size: 13px;
  line-height: 1.75;
  color: #6b7280;
}

.footer-brand-name {
  font-size: 15px;
  font-weight: 600;
  color: #1f2933;
}

.footer-brand-slogan {
  margin-top: 4px;
  font-size: 13px;
  color: #6b7280;
}

.footer-copy {
  margin-top: 10px;
  font-size: 12px;
  line-height: 1.7;
  color: #6b7280;
}

/* --------------------------------------------------------------------------
   components · 通用组件（摘要框 / 标签 / 条目行 / 上下项 / 相关链接 / 图片）
   -------------------------------------------------------------------------- */

/* 结论摘要框 --------------------------------------------------------- */

.conclusion-box {
  margin: 20px 0 0;
  padding: 16px 18px;
  background-color: #f0f6ff;
  border-left: 3px solid #1b5fb0;
  border-radius: 0 6px 6px 0;
}

.conclusion-box p {
  font-size: 15px;
  line-height: 1.75;
  color: #1f2933;
}

.conclusion-box p + p {
  margin-top: 8px;
}

/* 标签 --------------------------------------------------------------- */

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 4px;
  font-size: 12px;
  line-height: 1.7;
  white-space: nowrap;
  background-color: #eef3fa;
  color: #1b5fb0;
}

.tag-genre {
  background-color: #eef3fa;
  color: #1b5fb0;
}

.tag-status {
  background-color: #eef3fa;
  color: #1b5fb0;
}

.tag-status.is-ongoing,
.tag-status.tag-serial,
.tag-status.is-going {
  background-color: #eef3fa;
  color: #1b5fb0;
}

.tag-status.is-finished,
.tag-status.tag-finished,
.tag-status.is-done {
  background-color: #eef0f2;
  color: #4b5563;
}

.tag-status.is-short,
.tag-status.tag-short {
  background-color: #e6f4f1;
  color: #0f766e;
}

/* 条目行（首页更新 + 更新页 + 索引页共用外壳） ------------------------ */

.update-list,
.index-list {
  display: block;
}

.update-row,
.index-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding: 12px 4px;
  border-bottom: 1px solid #dde2e8;
}

.update-row:hover,
.index-row:hover {
  background-color: #f8fafc;
}

.update-row:hover .update-title,
.index-row:hover .index-name {
  text-decoration: underline;
}

.update-no,
.update-index,
.index-no {
  min-width: 26px;
  font-size: 13px;
  color: #6b7280;
}

.update-title {
  font-size: 16px;
  font-weight: 500;
  color: #1b5fb0;
}

.update-chapter,
.update-range,
.index-range {
  font-size: 13px;
  color: #6b7280;
}

.update-note {
  flex: 1 1 100%;
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

/* 上下项导航带 ------------------------------------------------------- */

.prev-next {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
  margin: 32px 0 0;
}

.prev-next-link,
.prev-next-item {
  display: flex;
  flex-direction: column;
  gap: 4px;
  min-height: 44px;
  padding: 12px 14px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 6px;
  color: #1f2933;
}

.prev-next-link:hover,
.prev-next-item:hover {
  border-color: #1b5fb0;
  background-color: #f8fafc;
  text-decoration: none;
}

.prev-next-link.next,
.prev-next-link.prev-next-next,
.prev-next-item.prev-next-next {
  text-align: right;
}

.prev-next-label {
  font-size: 12px;
  color: #6b7280;
}

.prev-next-title {
  font-size: 15px;
  font-weight: 500;
  color: #1b5fb0;
}

/* 相关页面 ----------------------------------------------------------- */

.related,
.related-block {
  margin: 32px 0 0;
}

.related h2,
.related-block h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.related-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
}

.related-list a {
  display: inline-block;
  padding: 6px 0;
  font-size: 15px;
  color: #1b5fb0;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 16px;
  margin: 24px 0 0;
  padding: 14px 16px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 6px;
}

.related-links-label {
  font-size: 13px;
  color: #6b7280;
}

.related-links-item {
  font-size: 15px;
  color: #1b5fb0;
}

/* 图片容器 ----------------------------------------------------------- */

.cover-figure,
.genre-figure,
.genre-card .genre-figure,
.topic-cover,
.catalog-figure,
.guide-figure,
.update-figure,
.content-figure {
  margin: 0;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
  overflow: hidden;
}

.cover-figure img,
.genre-card .genre-figure img,
.topic-cover img,
.catalog-figure img,
.guide-figure img,
.update-figure img,
.content-figure img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.cover-caption,
.genre-figure figcaption,
.topic-cover figcaption,
.catalog-figure figcaption,
.guide-figure figcaption,
.update-figure figcaption,
.content-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  line-height: 1.6;
  color: #6b7280;
  border-top: 1px solid #dde2e8;
}

/* 区块标题组 --------------------------------------------------------- */

.section-head {
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 20px;
}

.section-intro,
.section-note {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

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

/* 本期目录首屏 ------------------------------------------------------- */

.hero-magazine {
  display: grid;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
  gap: 28px;
  padding: 32px 0 40px;
  border-bottom: 1px solid #dde2e8;
}

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

.cover-figure img {
  aspect-ratio: 4 / 5;
  object-fit: cover;
}

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

.hero-kicker {
  font-size: 13px;
  color: #6b7280;
}

.hero-contents h1 {
  margin-top: 6px;
  font-size: 28px;
  font-weight: 600;
  line-height: 1.35;
  color: #1f2933;
}

.hero-lead {
  margin-top: 12px;
  font-size: 16px;
  line-height: 1.75;
  color: #1f2933;
}

.contents-list {
  margin-top: 20px;
  border-top: 1px solid #dde2e8;
}

.contents-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 4px 12px;
  padding: 11px 2px;
  border-bottom: 1px solid #dde2e8;
}

.contents-link {
  flex: 0 0 auto;
  min-width: 88px;
  font-size: 16px;
  font-weight: 500;
  color: #1b5fb0;
}

.contents-desc {
  flex: 1 1 200px;
  min-width: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

/* 题材入口八格 ------------------------------------------------------- */

.genre-entry {
  padding: 36px 0;
  border-bottom: 1px solid #dde2e8;
}

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

.genre-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.genre-card:hover {
  border-color: #1b5fb0;
}

.genre-card .genre-figure {
  border-radius: 6px;
}

.genre-card .genre-figure img {
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

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

.genre-def {
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

.genre-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 500;
  color: #1b5fb0;
}

/* 最近更新 ----------------------------------------------------------- */

.latest-updates {
  padding: 36px 0;
  border-bottom: 1px solid #dde2e8;
}

.latest-updates .update-list {
  border-top: 1px solid #dde2e8;
}

/* 专题辑录 ----------------------------------------------------------- */

.topic-picks {
  padding: 36px 0;
  border-bottom: 1px solid #dde2e8;
}

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

.topic-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.topic-card:hover {
  border-color: #1b5fb0;
}

.topic-no {
  font-size: 13px;
  color: #6b7280;
}

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

.topic-intent {
  font-size: 14px;
  line-height: 1.7;
  color: #1f2933;
}

.topic-scope {
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

.topic-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 500;
  color: #1b5fb0;
}

/* 篇幅区间索引 ------------------------------------------------------- */

.length-index {
  padding: 36px 0;
  border-bottom: 1px solid #dde2e8;
}

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

.length-column {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

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

.length-def {
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

.length-items {
  display: flex;
  flex-direction: column;
  border-top: 1px solid #dde2e8;
}

.length-items li {
  padding: 8px 0;
  border-bottom: 1px solid #dde2e8;
}

.length-link {
  font-size: 15px;
  font-weight: 500;
  color: #1b5fb0;
}

/* 阅读与共建提要 ----------------------------------------------------- */

.reading-note {
  padding: 36px 0 8px;
}

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

.note-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 18px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.note-title {
  font-size: 17px;
  font-weight: 600;
}

.note-text {
  font-size: 15px;
  line-height: 1.75;
  color: #1f2933;
}

.note-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 500;
  color: #1b5fb0;
}

/* --------------------------------------------------------------------------
   pages · 内页共用主体
   -------------------------------------------------------------------------- */

.inner-main > .page-header {
  padding-top: 12px;
}

.inner-main > .page-title {
  padding-top: 12px;
}

.inner-main > .conclusion-box + .page-layout,
.inner-main > .conclusion-box + .updates-groups,
.inner-main > .conclusion-box + .topic-volumes,
.inner-main > .conclusion-box + .index-usage,
.inner-main > .conclusion-box + .guide-body,
.inner-main > .conclusion-box + .page-layout {
  margin-top: 28px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 32px;
  margin-top: 28px;
  align-items: start;
}

.layout-shell {
  margin-top: 28px;
}

/* --------------------------------------------------------------------------
   pages · 题材分类（genre）
   -------------------------------------------------------------------------- */

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

.genre-main .page-header {
  padding: 0;
}

.genre-main .page-title {
  font-size: 28px;
}

.genre-index,
.genre-defs,
.genre-compare {
  margin-top: 28px;
}

.genre-index h2,
.genre-defs h2,
.genre-compare h2 {
  font-size: 20px;
}

.genre-index-list {
  margin-top: 14px;
  border-top: 1px solid #dde2e8;
}

.genre-index-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 12px;
  padding: 10px 2px;
  border-bottom: 1px solid #dde2e8;
}

.genre-index-item:hover {
  background-color: #f8fafc;
}

.index-num {
  min-width: 26px;
  font-size: 13px;
  color: #6b7280;
}

.genre-index-item a {
  font-size: 16px;
  font-weight: 500;
  color: #1b5fb0;
}

.index-def {
  flex: 1 1 220px;
  min-width: 0;
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

.genre-main > .genre-figure {
  margin-top: 24px;
}

.genre-main > .genre-figure img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.genre-block {
  margin-top: 20px;
  padding: 18px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
  scroll-margin-top: 88px;
}

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

.genre-block .genre-def {
  color: #1f2933;
}

.genre-block .genre-cross {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.genre-block .genre-scope {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

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

.compare-group h3 {
  font-size: 17px;
  margin-bottom: 10px;
}

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

.compare-col {
  min-width: 0;
  padding: 16px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
  font-size: 14px;
  line-height: 1.75;
  color: #1f2933;
}

/* 题材分类右侧栏 ----------------------------------------------------- */

.genre-side {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.side-block {
  padding: 16px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.side-title {
  font-size: 16px;
  margin-bottom: 10px;
}

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

.side-list li {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 10px;
  padding: 7px 0;
  border-bottom: 1px solid #dde2e8;
}

.side-list li:last-child {
  border-bottom: none;
}

.side-list a {
  font-size: 15px;
  color: #1b5fb0;
}

.side-tag {
  font-size: 12px;
  color: #6b7280;
}

.side-block.side-links .side-list li {
  justify-content: flex-start;
}

/* --------------------------------------------------------------------------
   pages · 最近更新（updates）
   -------------------------------------------------------------------------- */

.updates-groups {
  margin-top: 28px;
  max-width: 760px;
}

.update-group {
  margin-top: 28px;
  padding-top: 4px;
}

.update-group:first-child {
  margin-top: 0;
}

.group-title {
  font-size: 20px;
}

.group-desc {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

.update-group .update-list {
  margin-top: 14px;
  border-top: 1px solid #dde2e8;
}

.update-group .update-range {
  font-size: 13px;
  color: #6b7280;
}

.update-note-block {
  margin-top: 32px;
  max-width: 760px;
  padding: 20px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.update-note-block h2 {
  font-size: 20px;
}

.update-note-block > p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: #1f2933;
}

.update-figure {
  margin-top: 18px;
}

.update-figure img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.note-list {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.note-item {
  padding: 12px 14px;
  background-color: #f8fafc;
  border-left: 3px solid #dde2e8;
  border-radius: 0 6px 6px 0;
  font-size: 14px;
  line-height: 1.75;
  color: #1f2933;
}

.note-item strong {
  color: #1f2933;
}

.note-tail {
  margin-top: 18px;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.note-tail a {
  color: #1b5fb0;
}

/* --------------------------------------------------------------------------
   pages · 专题辑录（topics）
   -------------------------------------------------------------------------- */

.topic-cover {
  margin-top: 24px;
  max-width: 760px;
}

.topic-cover img {
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.topic-volumes {
  margin-top: 28px;
  max-width: 760px;
}

.volume-block {
  margin-top: 24px;
  padding: 20px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
  scroll-margin-top: 88px;
}

.volume-block:first-child {
  margin-top: 0;
}

.volume-block h2 {
  font-size: 20px;
}

.volume-intent {
  margin-top: 8px;
  font-size: 15px;
  line-height: 1.75;
  color: #1f2933;
}

.volume-list {
  margin-top: 14px;
  border-top: 1px solid #dde2e8;
}

.volume-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 10px;
  padding: 10px 2px;
  border-bottom: 1px solid #dde2e8;
}

.volume-item:hover {
  background-color: #f8fafc;
}

.volume-no {
  min-width: 24px;
  font-size: 13px;
  color: #6b7280;
}

.volume-name {
  font-size: 16px;
  font-weight: 500;
  color: #1f2933;
}

.chapter-range {
  font-size: 13px;
  color: #6b7280;
}

.volume-scope,
.volume-exclude {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.volume-scope strong,
.volume-exclude strong {
  color: #1f2933;
}

/* --------------------------------------------------------------------------
   pages · 条目索引（catalog）
   -------------------------------------------------------------------------- */

.index-usage {
  margin-top: 28px;
  padding: 20px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.index-usage h2 {
  font-size: 20px;
}

.index-usage p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: #1f2933;
}

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

.usage-list li {
  padding-left: 14px;
  position: relative;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.usage-list li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: #1b5fb0;
}

.catalog-figure {
  margin-top: 24px;
}

.catalog-figure img {
  aspect-ratio: 16 / 7;
  object-fit: cover;
}

.index-groups {
  margin-top: 28px;
}

.index-group {
  margin-top: 28px;
  scroll-margin-top: 88px;
}

.index-group:first-child {
  margin-top: 0;
}

.index-group h2 {
  font-size: 20px;
}

.group-note {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

.index-group .index-list {
  margin-top: 14px;
  border-top: 1px solid #dde2e8;
}

.index-name {
  font-size: 16px;
  font-weight: 500;
  color: #1b5fb0;
}

.status-note {
  margin-top: 32px;
  padding: 20px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.status-note h2 {
  font-size: 20px;
}

.status-note > p {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: #1f2933;
}

.status-list {
  margin-top: 14px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.status-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px 12px;
  padding: 10px 0;
  border-bottom: 1px solid #dde2e8;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.status-item:last-child {
  border-bottom: none;
}

.status-link {
  margin-top: 14px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 18px;
  font-size: 14px;
  color: #6b7280;
}

.status-link a {
  color: #1b5fb0;
}

/* --------------------------------------------------------------------------
   pages · 阅读说明（guide）
   -------------------------------------------------------------------------- */

.guide-body {
  margin-top: 28px;
  max-width: 720px;
}

.guide-section {
  margin-top: 28px;
  scroll-margin-top: 88px;
}

.guide-section:first-child {
  margin-top: 0;
}

.guide-section h2 {
  font-size: 20px;
}

.guide-section h3 {
  margin-top: 18px;
  font-size: 17px;
}

.guide-section p {
  margin-top: 10px;
  font-size: 16px;
  line-height: 1.75;
  color: #1f2933;
}

.guide-figure {
  margin-top: 18px;
}

.guide-figure img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.mark-list {
  margin-top: 16px;
  border-top: 1px solid #dde2e8;
}

.mark-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px 16px;
  padding: 11px 2px;
  border-bottom: 1px solid #dde2e8;
}

.mark-label {
  flex: 0 0 auto;
  min-width: 96px;
  font-size: 14px;
  font-weight: 600;
  color: #1b5fb0;
}

.mark-desc {
  flex: 1 1 220px;
  min-width: 0;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

/* 常见误区问答 ------------------------------------------------------- */

.faq {
  margin-top: 32px;
  max-width: 720px;
}

.faq h2 {
  font-size: 20px;
}

.faq-lead {
  margin-top: 8px;
  font-size: 14px;
  line-height: 1.7;
  color: #6b7280;
}

.faq-item {
  margin-top: 12px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
  overflow: hidden;
}

.faq-item summary {
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 500;
  color: #1f2933;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::before {
  content: "+";
  display: inline-block;
  width: 18px;
  margin-right: 8px;
  color: #1b5fb0;
  font-weight: 600;
}

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

.faq-item summary:hover {
  background-color: #f8fafc;
}

.faq-item p {
  padding: 0 16px 16px 42px;
  font-size: 15px;
  line-height: 1.75;
  color: #6b7280;
}

/* --------------------------------------------------------------------------
   pages · 纠错与共建（corrections）
   -------------------------------------------------------------------------- */

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

.correction-body > .content-figure {
  margin-top: 0;
}

.correction-body > .content-figure img {
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.section-block {
  margin-top: 28px;
}

.correction-body > .section-block:first-of-type {
  margin-top: 28px;
}

.section-block h2 {
  font-size: 20px;
}

.section-block > p {
  margin-top: 10px;
  font-size: 16px;
  line-height: 1.75;
  color: #1f2933;
}

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

.plain-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.plain-list li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: #1b5fb0;
}

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

.compare-col-yes,
.compare-col-no {
  min-width: 0;
  padding: 16px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.compare-col-yes {
  border-top: 3px solid #1b5fb0;
}

.compare-col-no {
  border-top: 3px solid #6b7280;
}

.compare-col-yes h3,
.compare-col-no h3,
.compare-col h3 {
  font-size: 16px;
  margin-bottom: 10px;
}

.compare-col-no {
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.compare-col-yes .check-list,
.compare-col-no .check-list,
.check-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.check-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: #1f2933;
}

.check-list li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: #1b5fb0;
}

.compare-col-no .check-list li {
  color: #6b7280;
}

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

.cross-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.cross-list li::before {
  content: "·";
  position: absolute;
  left: 2px;
  color: #1b5fb0;
}

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

.step-item {
  min-width: 0;
  padding: 16px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.step-name {
  display: block;
  font-size: 16px;
  font-weight: 600;
  color: #1f2933;
}

.step-item p {
  margin-top: 6px;
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.boundary-block {
  margin-top: 32px;
}

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

.boundary-item {
  min-width: 0;
  padding: 16px;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.boundary-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.boundary-item p {
  font-size: 14px;
  line-height: 1.75;
  color: #6b7280;
}

.related-block .related-links {
  margin-top: 16px;
}

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

.site-error .site-main {
  max-width: 1100px;
  padding: 0 20px 56px;
}

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-block {
  width: 100%;
  max-width: 560px;
  margin: 64px auto;
  padding: 32px 28px;
  text-align: center;
  background-color: #ffffff;
  border: 1px solid #dde2e8;
  border-radius: 8px;
}

.error-code {
  font-size: 40px;
  font-weight: 600;
  line-height: 1.2;
  color: #1b5fb0;
}

.error-title {
  margin-top: 10px;
  font-size: 24px;
  font-weight: 600;
}

.error-text {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.75;
  color: #6b7280;
}

.error-actions {
  margin-top: 22px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 12px 20px;
}

.error-button {
  display: inline-block;
  min-height: 44px;
  padding: 10px 22px;
  background-color: #1b5fb0;
  color: #ffffff;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 500;
  line-height: 1.6;
}

.error-button:hover {
  background-color: #174f93;
  color: #ffffff;
  text-decoration: none;
}

.error-link {
  font-size: 15px;
  color: #1b5fb0;
}

/* --------------------------------------------------------------------------
   responsive · 平板与移动端
   -------------------------------------------------------------------------- */

@media (max-width: 900px) {
  .genre-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .topic-grid,
  .length-grid,
  .note-grid,
  .compare-cols,
  .compare-columns,
  .step-list,
  .boundary-list {
    grid-template-columns: minmax(0, 1fr);
  }

  .page-layout,
  .layout-shell {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

  .genre-side {
    flex-direction: row;
    flex-wrap: wrap;
  }

  .genre-side .side-block {
    flex: 1 1 240px;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .header-inner {
    padding: 10px 16px;
    gap: 8px 12px;
  }

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

  .brand-slogan {
    font-size: 11px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 1 100%;
    min-width: 0;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    width: 100%;
    margin-top: 4px;
    padding: 6px 0;
    border-top: 1px solid #dde2e8;
  }

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

  .nav-link {
    display: block;
    padding: 12px 10px;
    min-height: 44px;
    font-size: 15px;
    border-radius: 6px;
  }

  .home-main,
  .inner-main,
  .site-error .site-main {
    padding: 0 16px 40px;
  }

  .breadcrumb {
    padding: 14px 16px 0;
  }

  .page-title,
  .page-header .page-title,
  .hero-contents h1,
  .genre-main .page-title {
    font-size: 22px;
  }

  .hero-magazine {
    grid-template-columns: minmax(0, 1fr);
    gap: 20px;
    padding: 22px 0 28px;
  }

  .cover-figure img {
    aspect-ratio: 16 / 10;
  }

  .genre-entry,
  .latest-updates,
  .topic-picks,
  .length-index,
  .reading-note {
    padding: 26px 0;
  }

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

  .update-row,
  .index-row,
  .genre-index-item,
  .volume-item,
  .mark-row {
    gap: 4px 8px;
  }

  .update-note {
    flex-basis: 100%;
  }

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

  .prev-next-link.next,
  .prev-next-link.prev-next-next,
  .prev-next-item.prev-next-next {
    text-align: left;
  }

  .update-note-block,
  .index-usage,
  .status-note,
  .volume-block,
  .guide-body,
  .faq,
  .topic-volumes,
  .topic-cover,
  .updates-groups {
    max-width: none;
  }

  .error-block {
    margin: 32px auto;
    padding: 24px 18px;
  }

  .error-code {
    font-size: 32px;
  }

  .error-title {
    font-size: 20px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
    padding: 26px 16px 22px;
  }

  .footer-brand {
    grid-column: auto;
  }
}

@media (max-width: 390px) {
  .header-inner,
  .home-main,
  .inner-main,
  .site-error .site-main,
  .breadcrumb,
  .footer-inner {
    padding-left: 12px;
    padding-right: 12px;
  }

  .update-title,
  .index-name,
  .volume-name {
    font-size: 15px;
  }

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

  .error-button {
    text-align: center;
  }
}