/* ==========================================================================
   虫虫漫画 · 全站样式表
   纸面米白底 / 作物绿主色 / 麦穗黄强调 / 细边框卡片 / 批次记录式排版
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. base —— 变量、重置、排版基础
   -------------------------------------------------------------------------- */

:root {
  --paper: #f7f5ee;
  --paper-deep: #efece1;
  --green: #3f6b3a;
  --green-dark: #2c4d29;
  --wheat: #d8a531;
  --ink: #1f2b1c;
  --ink-soft: #4c5a47;
  --ink-mute: #6f7a69;
  --line: #e6e0d2;
  --line-strong: #cdc4ae;
  --card-bg: #fffdf7;
  --radius: 6px;
  --radius-sm: 4px;
  --container: 1120px;
  --prose: 720px;
  --font-serif: "Songti SC", "SimSun", Georgia, "Times New Roman", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

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

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

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
}

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

p {
  margin: 0;
}

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

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

a:hover,
a:focus-visible {
  color: var(--green-dark);
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

dl,
dd,
dt {
  margin: 0;
}

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

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

/* --------------------------------------------------------------------------
   2. layout —— 骨架：页头、导航、主容器、面包屑、页标题区、页脚
   -------------------------------------------------------------------------- */

.site-header {
  position: relative;
  z-index: 30;
  background-color: var(--paper);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 24px;
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 14px 24px;
}

.brand {
  flex: 0 0 auto;
  font-family: var(--font-serif);
  font-size: 21px;
  font-weight: 700;
  color: var(--green-dark);
  text-decoration: none;
  letter-spacing: 0;
}

.brand::before {
  content: "";
  display: inline-block;
  width: 9px;
  height: 9px;
  margin-right: 8px;
  background-color: var(--wheat);
  vertical-align: 1px;
}

.brand:hover {
  color: var(--green);
  text-decoration: none;
}

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

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

.nav-list > li {
  display: block;
}

.nav-link {
  display: block;
  padding: 9px 14px;
  font-size: 15px;
  color: var(--ink-soft);
  border: 1px solid transparent;
  border-radius: var(--radius-sm);
  text-decoration: none;
}

.nav-link:hover {
  color: var(--green-dark);
  background-color: var(--paper-deep);
  text-decoration: none;
}

.nav-link.is-current {
  color: var(--green-dark);
  font-weight: 700;
  border-color: var(--line-strong);
  background-color: var(--card-bg);
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background-color: transparent;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  margin: 4px auto;
  background-color: var(--ink-soft);
}

.site-main {
  display: block;
  width: 100%;
}

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

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 18px 0 0;
  font-size: 14px;
  color: var(--ink-mute);
}

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

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

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

.page-header {
  max-width: var(--container);
  padding: 20px 0 26px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 34px;
  font-weight: 700;
  color: var(--green-dark);
}

.page-description {
  max-width: var(--prose);
  margin-top: 12px;
  font-size: 16px;
  color: var(--ink-soft);
}

.site-footer {
  margin-top: 56px;
  background-color: var(--paper-deep);
  border-top: 1px solid var(--line-strong);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: 40px;
  max-width: var(--container);
  margin: 0 auto;
  padding: 40px 24px 28px;
}

.footer-brand {
  flex: 1 1 260px;
  max-width: 340px;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  color: var(--green-dark);
}

.footer-brand-desc {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-mute);
}

.footer-nav {
  flex: 2 1 520px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.footer-group-title {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
}

.footer-list {
  margin-top: 10px;
}

.footer-list > li {
  margin-bottom: 6px;
}

.footer-link {
  font-size: 14px;
  color: var(--ink-soft);
}

.footer-link:hover {
  color: var(--green-dark);
}

.footer-copy {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px 32px;
  font-size: 13px;
  color: var(--ink-mute);
  border-top: 1px solid var(--line);
  padding-top: 16px;
}

/* 通用区块头 */
.section-head {
  max-width: var(--prose);
  margin-bottom: 22px;
}

.section-title {
  font-size: 24px;
  color: var(--green-dark);
}

.section-desc,
.section-intro,
.section-lead {
  margin-top: 10px;
  font-size: 15px;
  color: var(--ink-soft);
}

.section-intro,
.section-lead {
  max-width: var(--prose);
  margin-bottom: 22px;
}

.section-note,
.notes-tail,
.path-feedback,
.feedback-note,
.field-foot,
.ranking-note {
  margin-top: 20px;
  padding-top: 16px;
  font-size: 14px;
  color: var(--ink-mute);
  border-top: 1px dashed var(--line-strong);
}

.inline-link,
.text-link {
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

.inline-link:hover,
.text-link:hover {
  color: var(--green-dark);
  border-bottom-color: var(--green-dark);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   3. components —— 通用组件：卡片、字段表、步骤、封面、批次行、返回顶部
   -------------------------------------------------------------------------- */

/* 封面卡（首页 + 题材分类） */
.cover-card {
  display: flex;
  flex-direction: column;
  background-color: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.cover-card:hover {
  border-color: var(--line-strong);
}

.cover-link {
  display: flex;
  flex-direction: column;
  height: 100%;
  padding: 10px 10px 12px;
  color: var(--ink);
  text-decoration: none;
}

.cover-link:hover {
  text-decoration: none;
}

.cover-img,
.cover-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  background-color: var(--paper-deep);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.cover-figure {
  display: block;
}

.cover-name {
  margin-top: 10px;
  font-family: var(--font-serif);
  font-size: 15px;
  font-weight: 700;
  color: var(--green-dark);
  line-height: 1.45;
}

.cover-tag {
  margin-top: 4px;
  font-size: 13px;
  color: var(--ink-mute);
}

.cover-status {
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--wheat);
}

.cover-card .cover-link .cover-name,
.cover-card .cover-link .cover-tag {
  display: block;
}

/* 批次行（首页更新栏 + 最近更新页） */
.batch-group + .batch-group {
  margin-top: 20px;
}

.batch-date {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--green-dark);
  padding-bottom: 6px;
  border-bottom: 1px solid var(--line-strong);
}

.batch-list {
  margin-top: 8px;
}

.batch-row {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 8px;
  padding: 7px 0;
  font-size: 14px;
  border-bottom: 1px dashed var(--line);
}

.batch-row:last-child {
  border-bottom: none;
}

.batch-name,
.batch-link {
  font-weight: 700;
  color: var(--green);
}

.batch-chapter {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
}

.batch-genre {
  font-size: 13px;
  color: var(--ink-mute);
}

.batch-time {
  margin-left: auto;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
}

/* 字段说明（dl 系列） */
.field-list {
  border-top: 1px solid var(--line);
}

.field-list .field-name {
  padding-top: 12px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--green-dark);
}

.field-list .field-desc,
.field-list .field-value {
  padding-bottom: 12px;
  font-size: 14px;
  color: var(--ink-soft);
  border-bottom: 1px dashed var(--line);
}

.field-item {
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.field-item .field-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--green-dark);
}

.field-item .field-value {
  margin-top: 4px;
  font-size: 14px;
  color: var(--ink-soft);
}

.field-row {
  padding: 12px 0;
  border-bottom: 1px dashed var(--line);
}

.field-row .field-name {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--green-dark);
}

.field-row .field-desc,
.field-row .field-value {
  margin-top: 4px;
  font-size: 14px;
  color: var(--ink-soft);
}

/* 步骤条（首页 + 查阅指引） */
.step-list {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.step-item {
  display: flex;
  gap: 14px;
  padding: 18px;
  background-color: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-num,
.step-index {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--paper);
  background-color: var(--green);
  border-radius: 50%;
}

.step-body,
.step-content {
  min-width: 0;
  flex: 1 1 auto;
}

.step-title {
  font-size: 17px;
  color: var(--green-dark);
}

.step-text,
.step-desc {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-soft);
}

.step-link {
  display: inline-block;
  margin-top: 10px;
  font-size: 14px;
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

/* 列标题与“更多”入口 */
.column-title {
  font-size: 18px;
  color: var(--green-dark);
  padding-bottom: 8px;
  border-bottom: 2px solid var(--line-strong);
}

.column-more {
  display: inline-block;
  margin-top: 16px;
  font-size: 14px;
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
}

/* 返回顶部 */
.back-to-top {
  position: fixed;
  right: 22px;
  bottom: 22px;
  z-index: 40;
  width: 44px;
  height: 44px;
  padding: 0;
  font-size: 15px;
  color: var(--paper);
  background-color: var(--green);
  border: none;
  border-radius: var(--radius);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--green-dark);
}

/* --------------------------------------------------------------------------
   4. pages —— 首页
   -------------------------------------------------------------------------- */

/* 顶部事实条 */
.fact-bar {
  background-color: var(--green-dark);
}

.fact-bar-text {
  max-width: var(--container);
  margin: 0 auto;
  padding: 8px 24px;
  font-size: 13px;
  color: #e8e4d6;
}

/* 首屏 */
.hero {
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 44px;
  align-items: center;
  max-width: var(--container);
  margin: 0 auto;
  padding: 48px 24px 52px;
}

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

.hero-kicker {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
}

.hero-title {
  margin-top: 12px;
  font-size: 38px;
  color: var(--green-dark);
}

.hero-summary {
  max-width: 520px;
  margin-top: 16px;
  font-size: 16px;
  color: var(--ink-soft);
}

.hero-entries {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.entry-link {
  display: inline-block;
  padding: 10px 16px;
  font-size: 15px;
  color: var(--green-dark);
  background-color: var(--card-bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.entry-link:hover {
  color: var(--paper);
  background-color: var(--green);
  border-color: var(--green);
  text-decoration: none;
}

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

.hero-figure img {
  display: block;
  width: 100%;
  aspect-ratio: 4 / 3;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.hero-caption {
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-mute);
}

/* 题材方向总览 */
.genre-overview {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 8px;
}

.genre-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

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

.genre-card:hover {
  border-color: var(--line-strong);
}

.genre-name {
  font-size: 19px;
  color: var(--green-dark);
}

.genre-scope {
  margin-top: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.genre-count {
  margin-top: 12px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
}

.genre-link {
  margin-top: 14px;
  font-size: 14px;
  color: var(--green);
  border-bottom: 1px solid var(--line-strong);
  align-self: flex-start;
}

/* 最近更新批次与封面条目并列区 */
.update-cover {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 8px;
}

.update-cover-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

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

.cover-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  margin-top: 16px;
}

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

.update-column .batch-group:first-of-type {
  margin-top: 16px;
}

/* 人气位次参考与条目字段口径摘要 */
.rank-field {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 8px;
}

.rank-field-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr);
  gap: 36px;
  align-items: start;
}

.rank-column,
.field-column {
  min-width: 0;
}

.rank-list {
  margin-top: 16px;
  border-top: 1px solid var(--line);
}

.rank-row {
  display: flex;
  align-items: baseline;
  gap: 14px;
  padding: 11px 0;
  border-bottom: 1px dashed var(--line);
}

.rank-num {
  flex: 0 0 30px;
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--wheat);
}

.rank-name {
  font-size: 15px;
  font-weight: 700;
  color: var(--green-dark);
}

.rank-genre {
  margin-left: auto;
  font-size: 13px;
  color: var(--ink-mute);
}

.field-column .field-list {
  margin-top: 16px;
}

/* 查阅路径三步指引 */
.path-guide {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 8px;
}

/* 站内栏目索引 */
.site-index {
  max-width: var(--container);
  margin: 0 auto;
  padding: 56px 24px 8px;
}

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

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

.index-link {
  display: block;
  font-family: var(--font-serif);
  font-size: 16px;
  font-weight: 700;
  color: var(--green-dark);
}

.index-desc {
  margin-top: 8px;
  font-size: 13px;
  color: var(--ink-mute);
}

/* --------------------------------------------------------------------------
   5. pages —— 内页：题材分类
   -------------------------------------------------------------------------- */

.genre-directory,
.genre-scope,
.genre-fields,
.updates-batches,
.updates-entries,
.updates-notes,
.ranking-section,
.basis-section,
.field-section,
.guide-section {
  padding-top: 40px;
}

.genre-directory .section-title,
.genre-scope .section-title,
.genre-fields .section-title,
.updates-batches .section-title,
.updates-entries .section-title,
.updates-notes .section-title,
.ranking-section .section-title,
.basis-section .section-title,
.field-section .section-title,
.guide-section .section-title {
  padding-bottom: 10px;
  border-bottom: 2px solid var(--line-strong);
}

.genre-group {
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
}

.genre-group:last-of-type {
  border-bottom: none;
}

.genre-group-head {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px 18px;
}

.genre-group-name {
  font-size: 20px;
  color: var(--green-dark);
}

.genre-group-scope {
  flex: 1 1 320px;
  min-width: 0;
  font-size: 14px;
  color: var(--ink-soft);
}

.genre-group-count {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
}

.genre-group .cover-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
  max-width: 720px;
}

.genre-group-entry {
  margin-top: 14px;
  font-size: 14px;
}

/* 收录范围表 */
.scope-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--card-bg);
}

.scope-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
}

.scope-caption {
  padding: 12px 16px;
  font-size: 13px;
  color: var(--ink-mute);
  text-align: left;
  border-bottom: 1px solid var(--line);
}

.scope-table th,
.scope-table td {
  padding: 11px 16px;
  text-align: left;
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.scope-table thead th {
  font-family: var(--font-sans);
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
  background-color: var(--paper-deep);
}

.scope-table tbody th {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--green-dark);
}

.scope-table tbody tr:last-child th,
.scope-table tbody tr:last-child td {
  border-bottom: none;
}

/* --------------------------------------------------------------------------
   6. pages —— 内页：最近更新
   -------------------------------------------------------------------------- */

.updates-batches .batch-group {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.updates-batches .batch-group:last-of-type {
  border-bottom: none;
}

.updates-batches .batch-row {
  font-size: 15px;
}

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

.entry-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background-color: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.entry-item:hover {
  border-color: var(--line-strong);
}

.entry-cover {
  flex: 0 0 96px;
  width: 96px;
}

.entry-cover img {
  display: block;
  width: 96px;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--paper-deep);
}

.entry-body {
  min-width: 0;
  flex: 1 1 auto;
}

.entry-name {
  font-size: 17px;
  color: var(--green-dark);
}

.entry-name .entry-link {
  color: inherit;
  padding: 0;
  background: none;
  border: none;
  border-bottom: 1px solid var(--line-strong);
  border-radius: 0;
}

.entry-name .entry-link:hover {
  color: var(--green);
  background: none;
}

.entry-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--wheat);
}

.entry-genre {
  color: var(--ink-mute);
}

.entry-note {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

.field-dict {
  border-top: 1px solid var(--line);
}

/* --------------------------------------------------------------------------
   7. pages —— 内页：人气位次
   -------------------------------------------------------------------------- */

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

.ranking-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.ranking-number {
  flex: 0 0 38px;
  font-family: var(--font-mono);
  font-size: 20px;
  font-weight: 700;
  color: var(--wheat);
  text-align: right;
}

.ranking-cover {
  flex: 0 0 64px;
  width: 64px;
}

.ranking-cover img {
  display: block;
  width: 64px;
  aspect-ratio: 3 / 4;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background-color: var(--paper-deep);
}

.ranking-info {
  min-width: 0;
  flex: 1 1 auto;
}

.ranking-name {
  font-size: 17px;
  color: var(--green-dark);
}

.ranking-genre {
  margin-top: 4px;
  font-size: 13px;
  color: var(--ink-mute);
}

.ranking-entry {
  flex: 0 0 auto;
  padding: 8px 14px;
  font-size: 14px;
  color: var(--green-dark);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background-color: var(--card-bg);
}

.ranking-entry:hover {
  color: var(--paper);
  background-color: var(--green);
  border-color: var(--green);
  text-decoration: none;
}

.basis-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

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

.basis-title {
  font-size: 17px;
  color: var(--green-dark);
}

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

.basis-media {
  margin-top: 24px;
}

.media-figure img {
  display: block;
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.media-caption {
  max-width: 720px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-mute);
}

/* --------------------------------------------------------------------------
   8. pages —— 内页：查阅指引
   -------------------------------------------------------------------------- */

.guide-section {
  max-width: 900px;
}

.guide-fields .section-desc,
.guide-path .section-desc,
.guide-feedback .section-desc,
.guide-related .section-desc {
  max-width: var(--prose);
  margin-top: 10px;
  margin-bottom: 20px;
  font-size: 15px;
  color: var(--ink-soft);
}

.field-faq {
  border-top: 1px solid var(--line);
}

.field-faq .field-item {
  padding: 0;
  border-bottom: 1px solid var(--line);
}

.field-summary {
  padding: 14px 0;
  font-family: var(--font-mono);
  font-size: 15px;
  font-weight: 700;
  color: var(--green-dark);
  cursor: pointer;
}

.field-summary:hover {
  color: var(--green);
}

.field-body {
  padding: 0 0 16px;
}

.field-meaning {
  max-width: var(--prose);
  font-size: 15px;
  color: var(--ink-soft);
}

.field-sample {
  max-width: var(--prose);
  margin-top: 8px;
  padding: 10px 14px;
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--ink-soft);
  background-color: var(--paper-deep);
  border-left: 3px solid var(--wheat);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.guide-figure {
  margin-bottom: 24px;
}

.guide-figure img {
  display: block;
  width: 100%;
  max-width: 720px;
  aspect-ratio: 16 / 9;
  height: auto;
  object-fit: cover;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius);
}

.guide-figure-caption {
  max-width: 720px;
  margin-top: 10px;
  font-size: 13px;
  color: var(--ink-mute);
}

.feedback-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

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

.feedback-title {
  font-size: 17px;
  color: var(--green-dark);
}

.feedback-desc {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-soft);
}

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

.related-item {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 12px;
  padding: 14px 0;
  border-bottom: 1px dashed var(--line);
}

.related-link {
  font-size: 16px;
  font-weight: 700;
  color: var(--green);
}

.related-desc {
  font-size: 14px;
  color: var(--ink-mute);
}

/* --------------------------------------------------------------------------
   9. pages —— 404
   -------------------------------------------------------------------------- */

.error-main {
  display: block;
}

.error-inner {
  max-width: 720px;
  margin: 0 auto;
  padding: 64px 24px 32px;
}

.error-code {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--wheat);
}

.error-title {
  margin-top: 12px;
  font-size: 32px;
  color: var(--green-dark);
}

.error-desc {
  max-width: 560px;
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.btn-primary {
  display: inline-block;
  padding: 11px 20px;
  font-size: 15px;
  color: var(--paper);
  background-color: var(--green);
  border: 1px solid var(--green);
  border-radius: var(--radius-sm);
}

.btn-primary:hover {
  color: var(--paper);
  background-color: var(--green-dark);
  border-color: var(--green-dark);
  text-decoration: none;
}

.btn-plain {
  display: inline-block;
  padding: 11px 20px;
  font-size: 15px;
  color: var(--green-dark);
  background-color: var(--card-bg);
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
}

.btn-plain:hover {
  color: var(--green-dark);
  border-color: var(--green);
  text-decoration: none;
}

.error-help {
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
}

.error-help h2 {
  font-size: 20px;
  color: var(--green-dark);
}

.error-list {
  margin-top: 14px;
}

.error-list > li {
  padding: 9px 0;
  font-size: 15px;
  border-bottom: 1px dashed var(--line);
}

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

.error-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-mute);
}

/* --------------------------------------------------------------------------
   10. responsive —— 960px 与 640px 两档
   -------------------------------------------------------------------------- */

@media (max-width: 960px) {
  .header-inner {
    flex-wrap: wrap;
    gap: 12px;
    padding: 12px 18px;
  }

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

  .site-nav {
    flex: 1 1 100%;
    display: block;
  }

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

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

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

  .nav-link {
    padding: 13px 4px;
    border: none;
    border-radius: 0;
  }

  .nav-link.is-current {
    background-color: transparent;
    border: none;
  }

  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
    padding: 34px 18px 40px;
  }

  .hero-figure {
    order: -1;
  }

  .hero-title {
    font-size: 30px;
  }

  .genre-overview,
  .update-cover,
  .rank-field,
  .path-guide,
  .site-index {
    padding: 40px 18px 4px;
  }

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

  .update-cover-layout,
  .rank-field-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

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

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

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

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

  .inner-main {
    padding: 0 18px 48px;
  }

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

  .footer-inner {
    gap: 28px;
    padding: 32px 18px 22px;
  }

  .footer-nav {
    flex: 1 1 100%;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 20px;
  }

  .footer-copy {
    padding: 16px 18px 28px;
  }

  .genre-group .cover-grid {
    max-width: none;
  }
}

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

  .fact-bar-text {
    padding: 8px 16px;
    font-size: 12px;
    line-height: 1.6;
  }

  .brand {
    font-size: 19px;
  }

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

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

  .hero-entries {
    gap: 10px;
  }

  .entry-link {
    padding: 10px 14px;
    font-size: 14px;
  }

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

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

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

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

  .section-title {
    font-size: 21px;
  }

  .ranking-item {
    gap: 12px;
  }

  .ranking-number {
    flex: 0 0 28px;
    font-size: 17px;
  }

  .ranking-cover,
  .ranking-cover img {
    flex: 0 0 52px;
    width: 52px;
  }

  .ranking-entry {
    flex: 1 1 100%;
    text-align: center;
  }

  .entry-item {
    gap: 12px;
    padding: 14px;
  }

  .entry-cover,
  .entry-cover img {
    flex: 0 0 78px;
    width: 78px;
  }

  .batch-time {
    margin-left: 0;
  }

  .scope-table th,
  .scope-table td {
    padding: 10px 12px;
  }

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

  .error-inner {
    padding: 44px 16px 24px;
  }

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

  .back-to-top {
    right: 14px;
    bottom: 14px;
  }
}