/* ==========================================================================
   漫蛙漫画 · 全站样式
   基础 / 布局 / 组件 / 页面 / 响应式
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础
   -------------------------------------------------------------------------- */
:root {
  --bg-page: #f7f5f1;
  --bg-card: #ffffff;
  --ink-main: #232323;
  --ink-sub: #6b6b6b;
  --line-soft: #e4ded4;
  --line-strong: #d2c9bb;
  --accent: #c96a4a;
  --accent-dark: #a9543a;
  --tag-blue: #4a7c9b;
  --tag-green: #7a9b6a;
  --tag-yellow: #b98a3f;
  --radius-card: 6px;
  --radius-tag: 4px;
  --shadow-soft: 0 1px 2px rgba(35, 35, 35, 0.05);
  --shadow-lift: 0 6px 16px rgba(35, 35, 35, 0.09);
  --shell-width: 1120px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans CJK SC", "WenQuanYi Micro Hei",
    system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
}

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

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

body {
  margin: 0;
  background-color: var(--bg-page);
  color: var(--ink-main);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

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

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

h1,
h2,
h3,
h4 {
  margin: 0;
  color: var(--ink-main);
  font-weight: 700;
  line-height: 1.4;
}

p {
  margin: 0;
}

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

figure {
  margin: 0;
}

button {
  font: inherit;
  color: inherit;
}

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

/* --------------------------------------------------------------------------
   layout · 全站骨架
   -------------------------------------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
}

.site-header {
  background-color: #ffffff;
  border-bottom: 1px solid var(--line-soft);
}

.header-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px 24px;
}

.brand {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  color: var(--ink-main);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: 0;
  padding: 6px 0;
}

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

.site-nav {
  flex: 1 1 auto;
  display: flex;
  justify-content: flex-end;
}

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

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  border-radius: var(--radius-tag);
  color: var(--ink-main);
  font-size: 15px;
  line-height: 1.5;
}

.nav-link:hover {
  background-color: #f2ece3;
  color: var(--accent-dark);
}

.nav-link.is-current {
  color: var(--accent);
  font-weight: 700;
  box-shadow: inset 0 -2px 0 var(--accent);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-tag);
  background-color: #ffffff;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background-color: var(--ink-main);
}

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

.inner-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 24px 24px 56px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  margin-bottom: 16px;
  color: var(--ink-sub);
  font-size: 14px;
}

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

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

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

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

.page-header {
  padding-bottom: 20px;
  margin-bottom: 28px;
  border-bottom: 1px solid var(--line-soft);
}

.page-title {
  font-size: 26px;
  line-height: 1.35;
  letter-spacing: 0;
}

.page-description {
  margin-top: 10px;
  max-width: 780px;
  color: var(--ink-sub);
  font-size: 15px;
}

.page-description a {
  color: var(--accent);
}

.site-footer {
  background-color: #ffffff;
  border-top: 1px solid var(--line-soft);
  color: var(--ink-sub);
  font-size: 14px;
}

.footer-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 22px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  gap: 18px 40px;
}

.footer-brand {
  flex: 1 1 220px;
}

.footer-brand-name {
  color: var(--ink-main);
  font-size: 15px;
  font-weight: 700;
}

.footer-brand-desc {
  margin-top: 4px;
  line-height: 1.6;
}

.footer-nav {
  flex: 0 1 auto;
}

.footer-title {
  margin-bottom: 6px;
  color: var(--ink-main);
  font-size: 14px;
  font-weight: 700;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.footer-list a {
  color: var(--ink-sub);
}

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

.footer-note {
  flex: 1 1 240px;
}

.footer-note-text {
  line-height: 1.6;
}

.footer-copyright {
  margin-top: 6px;
  color: #8d8d8d;
}

/* 内页两栏布局：默认主内容在前，aside 在后 */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 264px;
  gap: 32px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: 264px minmax(0, 1fr);
}

.page-content,
.content-column {
  min-width: 0;
}

/* --------------------------------------------------------------------------
   components · 通用组件
   -------------------------------------------------------------------------- */
.section-title {
  font-size: 22px;
  line-height: 1.4;
}

.section-head {
  margin-bottom: 22px;
}

.section-desc,
.section-intro,
.section-lead {
  margin-top: 8px;
  max-width: 780px;
  color: var(--ink-sub);
  font-size: 15px;
}

.section-intro + *,
.section-lead + * {
  margin-top: 18px;
}

.section {
  margin-bottom: 44px;
}

.section:last-child {
  margin-bottom: 0;
}

.col-title {
  margin-bottom: 12px;
  font-size: 18px;
}

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: var(--radius-tag);
  font-size: 13px;
  line-height: 1.6;
  white-space: nowrap;
}

.tag-blue {
  background-color: #e7eff5;
  color: #2f5f7d;
}

.tag-green {
  background-color: #eaf1e5;
  color: #4e6b41;
}

.tag-yellow {
  background-color: #f7efdf;
  color: #8a6524;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 9px 20px;
  border: 1px solid transparent;
  border-radius: var(--radius-tag);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  cursor: pointer;
}

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

.btn-primary:hover {
  background-color: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #ffffff;
}

.btn-ghost {
  background-color: #ffffff;
  border-color: var(--line-strong);
  color: var(--ink-main);
}

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

.link-more {
  display: inline-block;
  font-size: 15px;
  font-weight: 600;
}

.text-link {
  color: var(--accent);
}

/* 图片容器统一比例 */
.hero-figure,
.topic-covers,
.overview-cover,
.pick-cover,
.rank-cover,
.update-thumb,
.guide-figure {
  overflow: hidden;
  border-radius: var(--radius-card);
  background-color: #efe9e0;
}

.hero-figure img,
.topic-covers img,
.overview-cover img,
.pick-cover img,
.rank-cover img,
.update-thumb img,
.guide-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-figure figcaption,
.guide-figure figcaption {
  padding: 8px 10px;
  background-color: #ffffff;
  color: var(--ink-sub);
  font-size: 13px;
  line-height: 1.5;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main {
  width: 100%;
}

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

.hero-section {
  padding: 40px 0 44px;
  background-color: #ffffff;
  border-bottom: 1px solid var(--line-soft);
}

.hero-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px;
  align-items: start;
}

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

.hero-fact {
  color: var(--ink-sub);
  font-size: 14px;
}

.hero-title {
  margin-top: 12px;
  font-size: 30px;
  line-height: 1.35;
  letter-spacing: 0;
}

.hero-lead {
  margin-top: 14px;
  color: #4a4a4a;
  font-size: 16px;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 18px;
}

.hero-tags .tag {
  padding: 5px 12px;
  font-size: 14px;
}

.hero-tags .tag:hover {
  filter: brightness(0.96);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.hero-media {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 18px;
}

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

.year-index {
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-page);
}

.year-index-title {
  font-size: 16px;
}

.year-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  margin-top: 10px;
}

.year-list a {
  color: var(--ink-sub);
  font-size: 15px;
}

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

.topics-overview,
.updates-directory,
.ranking-preview,
.guide-preview,
.site-index {
  padding: 44px 0;
}

.updates-directory,
.guide-preview {
  background-color: #ffffff;
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

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

.topic-block {
  display: flex;
  flex-direction: column;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
  box-shadow: var(--shadow-soft);
}

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

.topic-scope {
  margin-top: 8px;
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.65;
}

.topic-covers {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  margin-top: 14px;
}

.topic-covers img {
  aspect-ratio: 3 / 4;
}

.topic-more {
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
}

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

.update-item {
  display: grid;
  grid-template-columns: 88px minmax(0, 1.1fr) auto auto minmax(0, 1.6fr);
  gap: 14px;
  align-items: center;
  padding: 13px 4px;
  border-bottom: 1px solid var(--line-soft);
}

.update-item:first-child {
  border-top: 1px solid var(--line-soft);
}

.update-date {
  color: var(--ink-sub);
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

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

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

.update-note {
  color: var(--ink-sub);
  font-size: 14px;
}

.updates-more,
.ranking-more {
  margin-top: 18px;
}

.ranking-columns,
.guide-columns {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 32px;
  align-items: start;
}

.ranking-list-col,
.ranking-pick-col,
.guide-fields-col,
.guide-feedback-col {
  min-width: 0;
}

.ranking-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.ranking-item {
  display: grid;
  grid-template-columns: 34px minmax(0, 1fr);
  gap: 12px;
  align-items: baseline;
  padding: 10px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.ranking-item .rank-no {
  color: var(--accent);
  font-size: 16px;
  font-weight: 700;
}

.ranking-item .rank-name {
  font-weight: 600;
}

.ranking-item .rank-meta {
  grid-column: 2;
  color: var(--ink-sub);
  font-size: 13px;
}

.ranking-pick-col {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

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

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

.pick-tag {
  margin-top: 6px;
  color: var(--ink-sub);
  font-size: 13px;
}

.pick-reason {
  margin-top: 8px;
  color: #4a4a4a;
  font-size: 14px;
  line-height: 1.7;
}

.guide-fields-col,
.guide-feedback-col {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.field-summary {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.field-item {
  min-width: 0;
}

.field-summary .field-item {
  padding: 10px 0;
  border-bottom: 1px dashed var(--line-soft);
}

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

.field-name {
  font-size: 15px;
}

.field-desc {
  margin-top: 4px;
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

.feedback-text {
  color: #4a4a4a;
  font-size: 15px;
}

.feedback-note {
  margin-top: 10px;
  color: var(--ink-sub);
  font-size: 14px;
}

.guide-feedback-col .btn {
  margin-top: 16px;
}

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

.index-card {
  display: block;
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
  color: var(--ink-main);
}

.index-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lift);
}

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

.index-desc {
  margin-top: 6px;
  color: var(--ink-sub);
  font-size: 13px;
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   pages · 内页侧栏
   -------------------------------------------------------------------------- */
.topics-sidebar,
.page-sidebar,
.page-aside {
  min-width: 0;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.sidebar-title,
.aside-title {
  font-size: 16px;
}

.sidebar-title + .sidebar-list,
.sidebar-title + .sidebar-desc,
.sidebar-title + .sidebar-nav,
.aside-title + .aside-intro,
.aside-title + .aside-text,
.aside-title + .aside-list {
  margin-top: 10px;
}

.sidebar-desc,
.sidebar-text,
.aside-intro,
.aside-text {
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

.sidebar-list,
.aside-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 14px;
}

.sidebar-list a,
.aside-list a {
  color: var(--ink-main);
}

.sidebar-list a:hover,
.aside-list a:hover {
  color: var(--accent);
}

.sidebar-group + .sidebar-group,
.sidebar-filter,
.aside-block + .aside-block {
  margin-top: 18px;
  padding-top: 16px;
  border-top: 1px solid var(--line-soft);
}

.sidebar-group-title {
  margin-bottom: 8px;
  font-size: 14px;
}

.sidebar-link-row {
  margin-top: 8px;
}

.aside-filter-list,
.aside-link-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
  font-size: 14px;
}

.aside-link-list {
  flex-direction: column;
  gap: 6px;
}

/* 内页正文模块间距 */
.page-content > .section:last-child,
.content-column > .guide-section:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   pages · 题材分类
   -------------------------------------------------------------------------- */
.overview-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.overview-item {
  display: grid;
  grid-template-columns: 48px minmax(0, 1fr) 96px;
  gap: 16px;
  align-items: center;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.overview-code {
  color: var(--accent);
  font-size: 16px;
  font-weight: 700;
}

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

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

.overview-scope {
  margin-top: 4px;
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

.overview-cover img {
  aspect-ratio: 3 / 4;
}

.topics-detail .topic-block {
  margin-bottom: 16px;
}

.topics-detail .topic-block:last-child {
  margin-bottom: 0;
}

.topic-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 10px;
}

.topic-direction {
  margin-top: 10px;
  color: #4a4a4a;
  font-size: 14px;
  line-height: 1.7;
}

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

.pick-card {
  display: flex;
  flex-direction: column;
  padding: 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.pick-cover img {
  aspect-ratio: 3 / 4;
}

.pick-card .pick-name {
  margin-top: 12px;
}

.pick-card .pick-tag,
.pick-card .pick-meta {
  margin-top: 6px;
  color: var(--ink-sub);
  font-size: 13px;
}

.pick-desc,
.pick-reason {
  margin-top: 8px;
  color: #4a4a4a;
  font-size: 14px;
  line-height: 1.7;
}

.next-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.next-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-tag);
  background-color: var(--bg-card);
  color: var(--ink-main);
  font-size: 15px;
  font-weight: 600;
}

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

/* --------------------------------------------------------------------------
   pages · 最近更新
   -------------------------------------------------------------------------- */
.field-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

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

.section-update-list .update-item {
  grid-template-columns: 96px 64px minmax(0, 1fr);
  align-items: start;
  gap: 16px;
  padding: 16px 4px;
}

.update-thumb img {
  aspect-ratio: 3 / 4;
}

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

.update-body .update-name {
  display: inline-block;
  margin-right: 8px;
}

.update-body .update-status {
  display: inline-block;
}

.update-body .update-note {
  margin-top: 6px;
}

.status-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.status-item {
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-left: 3px solid var(--line-strong);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.status-item .status-name {
  font-size: 16px;
}

.status-ongoing {
  border-left-color: var(--tag-green);
}

.status-completed {
  border-left-color: var(--tag-blue);
}

.status-hiatus {
  border-left-color: var(--tag-yellow);
}

.status-desc {
  margin-top: 6px;
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

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

.crosslink-card {
  display: block;
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
  color: var(--ink-main);
}

.crosslink-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lift);
}

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

.crosslink-desc {
  margin-top: 6px;
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

/* --------------------------------------------------------------------------
   pages · 人气榜单
   -------------------------------------------------------------------------- */
.rank-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.rank-item {
  display: grid;
  grid-template-columns: 40px 72px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 14px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.rank-no {
  color: var(--accent);
  font-size: 18px;
  font-weight: 700;
  line-height: 1.4;
}

.rank-cover img {
  aspect-ratio: 3 / 4;
}

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

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

.rank-meta {
  margin-top: 6px;
  color: var(--ink-sub);
  font-size: 13px;
}

.rank-reason {
  margin-top: 8px;
  color: #4a4a4a;
  font-size: 14px;
  line-height: 1.7;
}

.method-block {
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.method-block p + p {
  margin-top: 10px;
}

.method-block p {
  color: #4a4a4a;
  font-size: 15px;
  line-height: 1.75;
}

.entry-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.entry-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 10px 18px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-tag);
  background-color: var(--bg-card);
  color: var(--ink-main);
  font-size: 15px;
  font-weight: 600;
}

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

/* --------------------------------------------------------------------------
   pages · 阅读说明
   -------------------------------------------------------------------------- */
.guide-figure img {
  aspect-ratio: 16 / 9;
}

.guide-section {
  margin-bottom: 40px;
}

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

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

.field-list .field-item {
  padding: 16px 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.field-sample {
  margin-top: 8px;
  color: var(--ink-sub);
  font-size: 13px;
}

.field-tag {
  display: inline-block;
  margin-right: 6px;
  padding: 1px 8px;
  border-radius: var(--radius-tag);
  background-color: #f2ece3;
  color: #6b6b6b;
  font-size: 12px;
}

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

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

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

.browse-text {
  margin-top: 8px;
  color: #4a4a4a;
  font-size: 15px;
  line-height: 1.75;
}

.browse-list {
  margin-top: 12px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--ink-sub);
  font-size: 14px;
  line-height: 1.7;
}

.browse-list li {
  padding-left: 14px;
  position: relative;
}

.browse-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--accent);
}

.browse-note {
  margin-top: 18px;
  color: var(--ink-sub);
  font-size: 14px;
}

.browse-note a {
  margin-right: 14px;
}

.rule-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

.rule-desc {
  margin-top: 6px;
  color: #4a4a4a;
  font-size: 14px;
  line-height: 1.75;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.faq-item {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.faq-question {
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  float: right;
  color: var(--accent);
  font-weight: 700;
}

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

.faq-answer {
  padding: 0 18px 16px;
  color: #4a4a4a;
  font-size: 15px;
  line-height: 1.75;
}

.faq-answer p + p {
  margin-top: 8px;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 56px 24px 72px;
}

.error-panel {
  max-width: 640px;
  padding: 32px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
}

.error-code {
  color: var(--accent);
  font-size: 40px;
  font-weight: 700;
  line-height: 1.1;
}

.error-title {
  margin-top: 10px;
  font-size: 26px;
}

.error-text {
  margin-top: 12px;
  color: var(--ink-sub);
  font-size: 15px;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 22px;
}

.error-hint {
  margin-top: 40px;
}

.error-hint-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.error-hint-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 12px 16px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-card);
  background-color: var(--bg-card);
  color: var(--ink-main);
  font-size: 15px;
}

.error-hint-list a:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}

/* --------------------------------------------------------------------------
   responsive · 960px
   -------------------------------------------------------------------------- */
@media (max-width: 960px) {
  .header-inner {
    padding: 12px 20px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: inline-flex;
    margin-left: auto;
  }

  .site-nav {
    flex: 1 0 100%;
    justify-content: flex-start;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 2px;
    padding: 8px 0 4px;
    border-top: 1px solid var(--line-soft);
  }

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

  .nav-link {
    padding: 12px 10px;
  }

  .nav-link.is-current {
    box-shadow: inset 3px 0 0 var(--accent);
  }

  .inner-main {
    padding: 20px 20px 48px;
  }

  .hero-section {
    padding: 32px 0 36px;
  }

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

  .section-inner {
    padding: 0 20px;
  }

  .topics-overview,
  .updates-directory,
  .ranking-preview,
  .guide-preview,
  .site-index {
    padding: 36px 0;
  }

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

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

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

  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
  }

  .page-layout.sidebar-left .page-content {
    order: 1;
  }

  .page-layout.sidebar-left .topics-sidebar {
    order: 2;
  }

  .topics-sidebar,
  .page-sidebar,
  .page-aside {
    padding: 16px;
  }

  .sidebar-list,
  .aside-list,
  .sidebar-group {
    display: flex;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 6px 16px;
  }

  .sidebar-group {
    flex-direction: column;
    gap: 6px;
  }

  .sidebar-group .sidebar-list {
    flex-direction: row;
  }

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

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

  .overview-item {
    grid-template-columns: 40px minmax(0, 1fr) 84px;
    gap: 12px;
  }

  .section-update-list .update-item {
    grid-template-columns: 84px 56px minmax(0, 1fr);
    gap: 12px;
  }

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

/* --------------------------------------------------------------------------
   responsive · 640px
   -------------------------------------------------------------------------- */
@media (max-width: 640px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 10px 16px;
    gap: 8px 16px;
  }

  .brand {
    font-size: 18px;
  }

  .inner-main {
    padding: 18px 16px 44px;
  }

  .page-title {
    font-size: 22px;
  }

  .page-header {
    padding-bottom: 16px;
    margin-bottom: 22px;
  }

  .hero-section {
    padding: 26px 0 30px;
  }

  .hero-inner,
  .section-inner {
    padding: 0 16px;
  }

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

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

  .hero-actions .btn {
    flex: 1 1 140px;
  }

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

  .topics-overview,
  .updates-directory,
  .ranking-preview,
  .guide-preview,
  .site-index {
    padding: 30px 0;
  }

  .topic-grid,
  .picks-grid,
  .pick-grid,
  .field-list,
  .field-grid,
  .crosslink-row,
  .browse-columns,
  .error-hint-list {
    grid-template-columns: minmax(0, 1fr);
  }

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

  .update-item,
  .section-update-list .update-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
    align-items: start;
  }

  .update-item .update-date {
    font-size: 13px;
  }

  .update-item .tag {
    justify-self: start;
  }

  .update-thumb {
    max-width: 120px;
  }

  .rank-item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 12px;
  }

  .rank-item .rank-cover {
    grid-row: 1 / span 2;
    max-width: 72px;
  }

  .rank-item .rank-body {
    grid-column: 2;
  }

  .overview-item {
    grid-template-columns: 36px minmax(0, 1fr);
    gap: 10px;
  }

  .overview-cover {
    grid-column: 2;
    max-width: 96px;
  }

  .ranking-item {
    grid-template-columns: 28px minmax(0, 1fr);
  }

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

  .footer-brand,
  .footer-note {
    flex: 1 1 100%;
  }

  .error-main {
    padding: 36px 16px 52px;
  }

  .error-panel {
    padding: 22px;
  }

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

  .error-title {
    font-size: 22px;
  }
}

/* --------------------------------------------------------------------------
   motion · 轻量动效增强
   -------------------------------------------------------------------------- */
.topic-block,
.pick-card,
.index-card,
.rank-item,
.overview-item,
.crosslink-card {
  transition: transform 0.18s ease, box-shadow 0.18s ease,
    border-color 0.18s ease;
}

.topic-block:hover,
.pick-card:hover,
.rank-item:hover,
.overview-item:hover {
  transform: translateY(-2px);
  border-color: var(--line-strong);
  box-shadow: var(--shadow-lift);
}

.nav-link,
.btn,
.next-link,
.entry-link,
.link-more,
.text-link,
.tag {
  transition: color 0.16s ease, background-color 0.16s ease,
    border-color 0.16s ease;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
  }

  .topic-block:hover,
  .pick-card:hover,
  .rank-item:hover,
  .overview-item:hover {
    transform: none;
  }
}