/* ==========================================================================
   njwhjd.com — 光棍手机影视 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base：变量、重置、排版基准
   -------------------------------------------------------------------------- */
:root {
  --bg: #fbfbf9;
  --ink: #17181a;
  --ink-soft: #5c6066;
  --accent: #c9452f;
  --line: #e3e2dd;
  --line-strong: #d2d1cb;
  --surface: #ffffff;
  --surface-alt: #f4f3ef;
  --radius: 6px;
  --radius-sm: 4px;
  --wrap: 1120px;
  --wrap-narrow: 880px;
  --gap-s: 12px;
  --gap: 24px;
  --gap-l: 40px;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Courier New", monospace;
}

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

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

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

h1, h2, h3, h4 {
  margin: 0;
  line-height: 1.3;
  font-weight: 600;
  color: var(--ink);
}

p {
  margin: 0;
}

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

dl, dd {
  margin: 0;
}

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

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

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

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

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

time {
  font-family: var(--font-mono);
  font-variant-numeric: tabular-nums;
}

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

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

/* --------------------------------------------------------------------------
   layout：站点骨架 —— site-body / site-header / site-nav / site-main / site-footer
   -------------------------------------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--bg);
  color: var(--ink);
}

/* 页头 */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: var(--bg);
  border-bottom: 1px solid var(--line);
}

.header-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--gap);
  min-height: 64px;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-size: 18px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: 0;
  white-space: nowrap;
}

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

/* 主导航 */
.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li {
  display: block;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 12px;
  font-size: 15px;
  color: var(--ink-soft);
  border-bottom: 2px solid transparent;
  transition: color .18s ease, border-color .18s ease;
}

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

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

/* 汉堡按钮（桌面隐藏） */
.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 12px 10px;
  flex-direction: column;
  justify-content: space-between;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--surface);
}

.nav-toggle-bar {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--ink);
  border-radius: 2px;
}

/* 主内容区 */
.site-main {
  flex: 1 1 auto;
  width: 100%;
}

.home-main {
  display: block;
}

.inner-main {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 0 24px 72px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  padding: 20px 0 4px;
  font-size: 14px;
  color: var(--ink-soft);
}

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

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

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

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

/* 内页标题区 */
.page-header {
  padding: 12px 0 28px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 30px;
  font-weight: 700;
  color: var(--ink);
  max-width: 34em;
}

.page-description {
  margin-top: 14px;
  max-width: 60em;
  font-size: 16px;
  color: var(--ink-soft);
}

/* 通用 section 标题 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
}

.section-intro,
.section-lead {
  margin-top: 10px;
  max-width: 62em;
  font-size: 15px;
  color: var(--ink-soft);
}

.section-paragraph {
  margin-top: 16px;
  max-width: 62em;
  font-size: 15px;
  color: var(--ink-soft);
}

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

.section-more {
  margin-top: 18px;
  font-size: 15px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color .18s ease;
}

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

.text-link::after {
  content: "→";
  font-size: 14px;
}

/* 页脚 */
.site-footer {
  margin-top: 40px;
  background: var(--surface-alt);
  border-top: 1px solid var(--line);
}

.footer-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 24px 28px;
  display: grid;
  grid-template-columns: minmax(240px, 1.6fr) repeat(4, minmax(140px, 1fr));
  gap: 32px 28px;
}

.footer-brand {
  max-width: 320px;
}

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

.footer-slogan {
  margin-top: 6px;
  font-size: 14px;
  color: var(--accent);
}

.footer-desc {
  margin-top: 12px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 12px;
}

.footer-list li + li {
  margin-top: 8px;
}

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

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

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

/* --------------------------------------------------------------------------
   components：通用组件
   -------------------------------------------------------------------------- */

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: background-color .18s ease, color .18s ease, border-color .18s ease;
}

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

.btn-primary:hover {
  background: #ad3a27;
  border-color: #ad3a27;
  color: #fff;
}

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

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

/* 频道行（首页与频道页共用字段顺序：编号 / 题材 / 覆盖 / 相邻） */
.channel-mini-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--line);
}

.channel-mini {
  display: grid;
  grid-template-columns: 56px minmax(120px, 1fr) minmax(180px, 2fr) minmax(140px, 1.4fr);
  gap: 16px;
  align-items: baseline;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.channel-code {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
}

.channel-name {
  font-weight: 600;
  color: var(--ink);
}

.channel-desc {
  color: var(--ink-soft);
}

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

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

.channel-row {
  display: grid;
  grid-template-columns: 64px minmax(120px, 1fr) minmax(220px, 2.2fr) minmax(160px, 1.4fr);
  gap: 18px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

/* 片单卡 */
.collection-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.collection-preview {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 28px;
}

.collection-card {
  display: flex;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  overflow: hidden;
  transition: border-color .18s ease;
}

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

.collection-cover {
  margin: 0;
  aspect-ratio: 16 / 9;
  background: var(--surface-alt);
  overflow: hidden;
}

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

.collection-body {
  padding: 16px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1 1 auto;
}

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

.collection-meta {
  font-size: 13px;
  color: var(--accent);
  font-family: var(--font-mono);
}

.collection-desc {
  font-size: 14px;
  color: var(--ink-soft);
  flex: 1 1 auto;
}

.collection-card .text-link {
  font-size: 14px;
  align-self: flex-start;
}

/* 步骤条 */
.step-list {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  counter-reset: step;
}

.step-item {
  position: relative;
  padding: 18px 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
  min-width: 0;
}

.step-index {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 6px;
}

.step-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 10px;
}

.step-check,
.step-done {
  font-size: 14px;
  color: var(--ink-soft);
}

.step-check + .step-done {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

/* 字段表 */
.field-table {
  width: 100%;
  font-size: 14px;
}

.field-table caption {
  text-align: left;
}

.field-table th,
.field-table td {
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.field-table thead th {
  color: var(--ink);
  font-weight: 700;
  border-bottom: 1px solid var(--line-strong);
}

.field-table tbody th {
  width: 32%;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

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

/* 边界列表 */
.boundary-list {
  display: grid;
  gap: 10px;
  font-size: 14px;
  color: var(--ink-soft);
}

.boundary-list li {
  position: relative;
  padding-left: 16px;
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: .72em;
  width: 6px;
  height: 1px;
  background: var(--accent);
}

/* 相关入口列表 */
.related-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 24px;
  margin-top: 16px;
}

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

.related-item a {
  display: inline-block;
  padding: 8px 0;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  width: 100%;
}

.related-item a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* 记录组（首页速览） */
.record-groups {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.record-group {
  min-width: 0;
}

.record-month {
  font-size: 15px;
  font-weight: 700;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-strong);
  font-family: var(--font-mono);
}

.record-list {
  margin-top: 10px;
  display: grid;
  gap: 10px;
}

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

.record-item time {
  color: var(--accent);
  margin-right: 8px;
}

/* --------------------------------------------------------------------------
   pages：首页
   -------------------------------------------------------------------------- */
.site-notice {
  background: var(--ink);
  color: #e9e8e4;
  font-size: 13px;
  padding: 8px 24px;
  text-align: center;
}

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

.hero-inner {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 56px 24px 48px;
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

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

.hero-eyebrow {
  font-size: 13px;
  font-family: var(--font-mono);
  color: var(--accent);
  margin-bottom: 14px;
}

.hero-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.22;
  max-width: 18em;
}

.hero-text {
  margin-top: 18px;
  max-width: 36em;
  font-size: 16px;
  color: var(--ink-soft);
}

.hero-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-media {
  margin: 0;
  min-width: 0;
}

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

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

/* 首页各 section 统一节奏 */
.home-main > section:not(.hero) {
  width: 100%;
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 48px 24px;
  border-bottom: 1px solid var(--line);
}

.home-main > section:last-of-type {
  border-bottom: 0;
}

.front-index .channel-mini-list {
  margin-top: 22px;
}

/* 字段说明与边界摘要（首页左右两栏） */
.field-boundary-cols {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 1fr);
  gap: 40px;
  margin-top: 22px;
}

.field-brief,
.boundary-brief {
  min-width: 0;
}

.field-brief .field-table {
  margin-top: 12px;
}

.boundary-brief .boundary-list {
  margin-top: 12px;
}

/* 站内栏目索引网格 */
.page-index-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px 24px;
  margin-top: 22px;
}

.page-index-item {
  min-width: 0;
  padding: 16px 0 18px;
  border-top: 1px solid var(--line-strong);
}

.page-index-link {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
}

.page-index-link::after {
  content: "→";
  font-size: 14px;
  color: var(--accent);
}

.page-index-link:hover {
  color: var(--accent);
}

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

/* --------------------------------------------------------------------------
   pages：内页公共模块
   -------------------------------------------------------------------------- */
.inner-main > section,
.inner-main > figure,
.inner-main > nav {
  margin-top: 40px;
}

.inner-main > .page-header {
  margin-top: 0;
}

/* 频道页 */
.channel-table {
  margin-top: 20px;
  border-top: 1px solid var(--line-strong);
}

.channel-table .channel-row {
  display: grid;
  grid-template-columns: 64px minmax(120px, 1fr) minmax(220px, 2.4fr) minmax(160px, 1.4fr);
  gap: 18px;
  align-items: baseline;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.channel-row-head {
  font-size: 13px;
  color: var(--ink-soft);
  font-weight: 700;
  border-bottom: 1px solid var(--line-strong);
}

.channel-cell {
  min-width: 0;
}

.channel-row-head .channel-cell {
  color: var(--ink-soft);
}

.channel-table .cell-no {
  font-family: var(--font-mono);
  color: var(--accent);
}

.channel-table .cell-topic {
  font-weight: 600;
  color: var(--ink);
}

.channel-table .cell-scope,
.channel-table .cell-adjacent {
  color: var(--ink-soft);
}

.channel-figure {
  margin: 28px 0 0;
}

.channel-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

/* 频道与片单衔接 */
.bridge-list {
  margin-top: 14px;
  display: grid;
  gap: 10px;
}

.bridge-item a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
}

.bridge-item a::after {
  content: "→";
  font-size: 14px;
}

.bridge-item a:hover {
  border-bottom-color: var(--accent);
}

/* 频道选择建议 */
.advice-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.advice-item {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.advice-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* 相关入口（频道页内嵌 nav） */
.related-links {
  margin-top: 40px;
}

/* 片单页 */
.collections-overview .collection-grid {
  margin-top: 20px;
}

.collections-overview .collection-card {
  padding-bottom: 4px;
}

.collections-overview .collection-name {
  padding: 16px 18px 0;
}

.collections-overview .collection-meta {
  padding: 6px 18px 0;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 10px;
  margin: 0;
}

.collections-overview .collection-meta dt {
  color: var(--ink-soft);
  font-family: var(--font-sans);
  font-size: 13px;
}

.collections-overview .collection-meta dd {
  font-family: var(--font-mono);
  color: var(--accent);
  font-size: 13px;
}

.collections-overview .collection-desc {
  padding: 10px 18px 20px;
}

.structure-list {
  margin-top: 20px;
  display: grid;
  gap: 16px;
}

.structure-item {
  padding: 16px 20px;
  border-left: 2px solid var(--accent);
  background: var(--surface);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.structure-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.structure-item p {
  font-size: 14px;
  color: var(--ink-soft);
}

.mapping-table-wrap {
  margin-top: 20px;
  overflow-x: auto;
}

.mapping-table {
  min-width: 520px;
  font-size: 14px;
  border-top: 1px solid var(--line-strong);
}

.mapping-table caption {
  text-align: left;
  font-size: 13px;
  color: var(--ink-soft);
  padding-bottom: 8px;
}

.mapping-table th,
.mapping-table td {
  padding: 12px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.mapping-table thead th {
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--line-strong);
}

.mapping-table tbody th {
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
}

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

.mapping-note {
  margin-top: 16px;
  font-size: 14px;
  color: var(--ink-soft);
}

.mapping-note a {
  color: var(--accent);
  margin-right: 12px;
  border-bottom: 1px solid transparent;
}

.mapping-note a:hover {
  border-bottom-color: var(--accent);
}

/* 浏览指引页 */
.guide-figure {
  margin: 40px 0 0;
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

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

.prepare-item {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.prepare-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

/* FAQ */
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 4px 0;
}

.faq-item:first-of-type {
  border-top: 1px solid var(--line-strong);
  margin-top: 20px;
}

.faq-question {
  cursor: pointer;
  list-style: none;
  padding: 14px 32px 14px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  position: relative;
  min-height: 44px;
  display: flex;
  align-items: center;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--accent);
  line-height: 1;
}

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

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

.faq-answer {
  padding: 0 0 16px;
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 62em;
}

.faq-answer a {
  color: var(--accent);
  margin: 0 4px;
  border-bottom: 1px solid transparent;
}

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

/* 下一步入口 */
.next-list {
  margin-top: 20px;
  display: grid;
  gap: 12px;
}

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

.next-item a {
  font-size: 16px;
  font-weight: 600;
  color: var(--accent);
  min-height: 32px;
}

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

/* 字段说明页 */
.field-figure {
  margin: 32px 0 0;
}

.field-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

.field-section .field-table {
  margin-top: 20px;
}

.boundary-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 32px;
  margin-top: 20px;
}

.boundary-col {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.boundary-col .subsection-title {
  margin-bottom: 12px;
}

.boundary-col--in .subsection-title {
  color: var(--ink);
}

.boundary-col--out .subsection-title {
  color: var(--accent);
}

.example-block {
  margin-top: 24px;
  padding: 20px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.example-block .subsection-title {
  margin-bottom: 12px;
}

.example-fields {
  display: grid;
  grid-template-columns: minmax(120px, 160px) minmax(0, 1fr);
  gap: 8px 16px;
  font-size: 14px;
}

.example-fields dt {
  font-weight: 600;
  color: var(--ink);
}

.example-fields dd {
  color: var(--ink-soft);
  min-width: 0;
}

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

.example-note a {
  color: var(--accent);
  border-bottom: 1px solid transparent;
}

.example-note a:hover {
  border-bottom-color: var(--accent);
}

/* 整理记录页 */
.record-months details.record-month {
  border-bottom: 1px solid var(--line);
}

.record-months details.record-month:first-of-type {
  border-top: 1px solid var(--line-strong);
  margin-top: 20px;
}

.record-month-summary {
  cursor: pointer;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 32px 16px 0;
  min-height: 44px;
  position: relative;
}

.record-month-summary::-webkit-details-marker {
  display: none;
}

.record-month-summary::after {
  content: "+";
  position: absolute;
  right: 4px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 18px;
  color: var(--accent);
  line-height: 1;
}

.record-month[open] .record-month-summary::after {
  content: "−";
}

.record-month-summary:hover .record-month-name {
  color: var(--accent);
}

.record-month-name {
  font-family: var(--font-mono);
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
}

.record-month-count {
  font-size: 13px;
  color: var(--ink-soft);
}

.record-months .record-list {
  padding-bottom: 12px;
}

.record-months .record-item {
  display: grid;
  grid-template-columns: minmax(90px, 110px) minmax(120px, 200px) minmax(0, 1fr);
  gap: 6px 16px;
  padding: 10px 0;
  border-top: 1px dashed var(--line);
  align-items: baseline;
}

.record-months .record-date {
  font-size: 13px;
  color: var(--accent);
}

.record-months .record-target {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink);
}

.record-months .record-note {
  font-size: 14px;
  color: var(--ink-soft);
  min-width: 0;
}

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

.type-item {
  min-width: 0;
  padding: 18px 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--surface);
}

.type-name {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 8px;
}

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

.lookup-body {
  margin-top: 20px;
}

.lookup-text {
  font-size: 15px;
  color: var(--ink-soft);
  max-width: 62em;
}

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

.lookup-figure img {
  width: 100%;
  aspect-ratio: 16 / 7;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

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

.lookup-links {
  display: grid;
  gap: 10px;
  margin: 18px 0;
}

.lookup-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  font-size: 15px;
  color: var(--accent);
  border-bottom: 1px solid transparent;
}

.lookup-links a::after {
  content: "→";
  font-size: 14px;
}

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

.lookup-text a {
  color: var(--accent);
  margin: 0 4px;
  border-bottom: 1px solid transparent;
}

.lookup-text a:hover {
  border-bottom-color: var(--accent);
}

.related-nav {
  margin-top: 40px;
}

.related-title {
  font-size: 22px;
  font-weight: 700;
}

/* 404 */
.error-main {
  width: 100%;
  max-width: var(--wrap-narrow);
  margin: 0 auto;
  padding: 72px 24px 96px;
}

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

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  color: var(--accent);
  margin-bottom: 12px;
}

.error-title {
  font-size: 34px;
  font-weight: 700;
  line-height: 1.25;
}

.error-text {
  margin-top: 14px;
  font-size: 16px;
  color: var(--ink-soft);
  max-width: 46em;
}

.error-text + .error-text {
  margin-top: 8px;
}

.error-actions {
  margin-top: 26px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

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

.error-path-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px 24px;
}

.error-path-list a {
  display: block;
  padding: 12px 0;
  font-size: 15px;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}

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

/* --------------------------------------------------------------------------
   responsive
   -------------------------------------------------------------------------- */

/* 平板：≤980px */
@media (max-width: 980px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
    padding: 40px 24px 36px;
  }

  .hero-title {
    font-size: 34px;
  }

  .hero-media img {
    aspect-ratio: 16 / 9;
  }

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

  .footer-brand {
    grid-column: 1 / -1;
    max-width: 100%;
  }

  .field-boundary-cols {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

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

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

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

  .channel-table .channel-row,
  .channel-row {
    grid-template-columns: 56px minmax(100px, 1fr) minmax(0, 1.6fr);
  }

  .channel-table .cell-adjacent,
  .channel-adjacent {
    grid-column: 2 / -1;
    font-size: 13px;
  }

  .channel-row-head .cell-adjacent {
    display: none;
  }
}

/* 手机：≤768px */
@media (max-width: 768px) {
  .header-inner {
    padding: 10px 16px;
    min-height: 58px;
    position: relative;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
  }

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

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

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

  .nav-link {
    width: 100%;
    padding: 12px 4px;
    border-bottom: 0;
    border-left: 2px solid transparent;
    font-size: 16px;
    justify-content: flex-start;
  }

  .nav-link.is-current {
    border-bottom: 0;
    border-left-color: var(--accent);
    padding-left: 10px;
  }

  .inner-main {
    padding: 0 16px 56px;
  }

  .home-main > section:not(.hero) {
    padding: 36px 16px;
  }

  .hero-inner {
    padding: 32px 16px 30px;
  }

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

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

  .hero-actions .btn {
    flex: 1 1 auto;
  }

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

  .page-header {
    padding: 10px 0 22px;
  }

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

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

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

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

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

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

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

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

  .channel-mini,
  .channel-row,
  .channel-table .channel-row {
    grid-template-columns: 48px minmax(0, 1fr);
    gap: 6px 12px;
  }

  .channel-mini .channel-desc,
  .channel-row .channel-desc,
  .channel-table .cell-scope {
    grid-column: 2 / -1;
  }

  .channel-mini .channel-adjacent,
  .channel-row .channel-adjacent,
  .channel-table .cell-adjacent {
    grid-column: 2 / -1;
  }

  .channel-table .channel-row-head {
    display: none;
  }

  .channel-figure img,
  .guide-figure img,
  .field-figure img,
  .lookup-figure img {
    aspect-ratio: 16 / 9;
  }

  .field-table thead th,
  .field-table tbody th {
    white-space: normal;
  }

  .field-table tbody th {
    width: 38%;
  }

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

  .example-fields dd + dt {
    margin-top: 8px;
  }

  .record-months .record-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px;
  }

  .record-months .record-target {
    font-size: 15px;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 36px 16px 24px;
  }

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

  .error-main {
    padding: 48px 16px 72px;
  }

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

/* 小屏：≤480px */
@media (max-width: 480px) {
  body {
    font-size: 15px;
  }

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

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

  .section-title,
  .related-title {
    font-size: 18px;
  }

  .btn {
    width: 100%;
  }

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

  .collection-body {
    padding: 14px 14px 18px;
  }

  .step-item,
  .prepare-item,
  .advice-item,
  .type-item,
  .boundary-col,
  .example-block {
    padding: 16px 14px 18px;
  }

  .field-table th,
  .field-table td {
    padding: 9px 8px;
  }

  .mapping-table th,
  .mapping-table td {
    padding: 10px 8px;
  }
}