/* ==========================================================================
   光棍影院在线观看 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  --bg: #f7f5f0;
  --surface: #fffdf9;
  --ink: #1c1b19;
  --ink-soft: #5c5a56;
  --accent: #b4432c;
  --accent-deep: #8f3320;
  --teal: #2f5d5a;
  --line: #dcd8d0;
  --line-strong: #c6c0b5;
  --radius: 6px;
  --radius-sm: 4px;
  --wrap: 1180px;
  --gap: 28px;
  --gap-sm: 16px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-mono: "SFMono-Regular", "JetBrains Mono", Menlo, Consolas, "Courier New", monospace;
}

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

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

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

h1,
h2,
h3,
h4,
p,
figure,
dl,
dd,
ol,
ul {
  margin: 0;
  padding: 0;
}

ul,
ol {
  list-style: none;
}

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

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

a:hover,
a:focus-visible {
  color: var(--accent-deep);
  text-decoration: underline;
  text-underline-offset: 3px;
}

a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--teal);
  outline-offset: 2px;
}

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

/* --------------------------------------------------------------------------
   layout · 全站骨架：页头、导航、主容器、面包屑、页脚
   -------------------------------------------------------------------------- */
.site-body {
  background-color: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

.home-main {
  padding-top: 8px;
}

/* 顶部线索说明条 */
.topline-bar,
.top-notice,
.top-tip,
.top-line-bar {
  background-color: var(--ink);
  color: #f2efe9;
}

.topline-bar,
.top-line-bar,
.top-tip {
  padding: 10px 24px;
}

.top-notice {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 10px 24px;
}

.topline-text,
.top-notice-text,
.top-tip-text,
.top-line-text {
  max-width: var(--wrap);
  margin: 0 auto;
  font-size: 13.5px;
  line-height: 1.6;
  color: #ece8e0;
}

.top-notice .top-notice-text {
  margin: 0;
  flex: 1 1 auto;
  max-width: var(--wrap);
}

.notice-text {
  flex: 1 1 auto;
  max-width: var(--wrap);
  font-size: 13.5px;
  line-height: 1.6;
  color: #ece8e0;
}

.top-notice-close,
.notice-close {
  flex: 0 0 auto;
  width: 30px;
  height: 30px;
  border-radius: var(--radius-sm);
  color: #ece8e0;
  font-size: 16px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(236, 232, 224, 0.35);
}

.top-notice-close:hover,
.notice-close:hover {
  background-color: rgba(236, 232, 224, 0.14);
}

/* 实用工具栏 */
.utility-bar {
  background-color: #efece5;
  border-bottom: 1px solid var(--line);
}

.utility-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: 8px 20px;
  min-height: 40px;
}

.utility-lang,
.utility-status,
.utility-label,
.utility-item {
  font-size: 13px;
  color: var(--ink-soft);
  line-height: 1.6;
}

.utility-label {
  color: var(--ink);
  font-weight: 600;
  margin-right: 4px;
}

.utility-link {
  font-size: 13px;
  color: var(--ink-soft);
  padding: 4px 2px;
}

.utility-link:hover,
.utility-link:focus-visible {
  color: var(--accent);
}

.utility-links,
.utility-list,
.utility-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.utility-list .utility-item {
  display: flex;
  align-items: center;
}

/* 页头与主导航 */
.site-header {
  background-color: var(--surface);
  border-bottom: 1px solid var(--line);
  position: sticky;
  top: 0;
  z-index: 40;
}

.header-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 14px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}

.brand {
  display: flex;
  flex-direction: column;
  gap: 2px;
  color: var(--ink);
  text-decoration: none;
  min-height: 44px;
  justify-content: center;
}

.brand:hover,
.brand:focus-visible {
  text-decoration: none;
  color: var(--ink);
}

.brand-name {
  font-size: 20px;
  font-weight: 700;
  line-height: 1.3;
}

.brand-sub {
  font-size: 12.5px;
  color: var(--ink-soft);
  line-height: 1.4;
}

.site-nav {
  display: block;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px 6px;
}

.nav-item {
  display: block;
}

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

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--ink);
  background-color: #f2efe8;
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

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

/* 面包屑 */
.breadcrumb {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 20px 24px 0;
  font-size: 13.5px;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

.breadcrumb-item {
  display: flex;
  align-items: center;
  gap: 8px;
}

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

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

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

.breadcrumb-link:hover,
.breadcrumb-link:focus-visible {
  color: var(--accent);
}

/* 页面标题区 */
.page-header {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 22px 24px 26px;
  border-bottom: 1px solid var(--line);
}

.page-title {
  font-size: 32px;
  line-height: 1.28;
  font-weight: 700;
  color: var(--ink);
  max-width: 22em;
}

.page-description {
  margin-top: 12px;
  font-size: 15.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 46em;
}

/* 页脚 */
.site-footer {
  margin-top: auto;
  background-color: #efece5;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
}

.footer-inner {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 44px 24px 30px;
  display: grid;
  grid-template-columns: minmax(240px, 1.4fr) repeat(4, minmax(140px, 1fr));
  gap: 28px 24px;
}

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

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

.footer-desc {
  margin-top: 10px;
  font-size: 13.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 30em;
}

.footer-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 8px;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 12px;
}

.footer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-link {
  font-size: 13.5px;
  color: var(--ink-soft);
  display: inline-block;
  padding: 3px 0;
}

.footer-link:hover,
.footer-link:focus-visible {
  color: var(--accent);
}

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

.footer-copy {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 16px 24px 22px;
  font-size: 13px;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   components · 通用模块：区块头、按钮、文本链接、列表与卡片
   -------------------------------------------------------------------------- */
.section {
  padding: 46px 0;
  border-bottom: 1px solid var(--line);
}

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

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

.section-title {
  font-size: 23px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--ink);
}

.section-desc,
.section-intro {
  margin-top: 10px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--ink-soft);
  max-width: 52em;
}

.section-text {
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 52em;
}

.section-text + .section-text {
  margin-top: 12px;
}

.section-more {
  margin-top: 20px;
}

.text-link {
  font-size: 14.5px;
  font-weight: 600;
  color: var(--accent);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 44px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  text-decoration: none;
}

.btn:hover,
.btn:focus-visible {
  text-decoration: none;
}

.btn-primary {
  background-color: var(--accent);
  color: #fffaf6;
}

.btn-primary:hover,
.btn-primary:focus-visible {
  background-color: var(--accent-deep);
  color: #fffaf6;
}

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

.btn-ghost:hover,
.btn-ghost:focus-visible {
  border-color: var(--ink);
  color: var(--ink);
  background-color: #f2efe8;
}

/* 两栏对照 */
.two-column {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr);
  gap: var(--gap);
  align-items: start;
}

.column {
  min-width: 0;
}

.column-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--ink);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 14px;
}

.column-text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.column-text + .column-text {
  margin-top: 10px;
}

.column-more {
  margin-top: 16px;
}

.subsection-title {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}

/* 字段列表（首页摘要） */
.field-list {
  display: block;
}

.field-list .field-name {
  font-family: var(--font-mono);
  font-size: 13.5px;
  font-weight: 600;
  color: var(--teal);
  padding-top: 12px;
}

.field-list .field-name:first-of-type {
  padding-top: 0;
}

.field-list .field-meaning {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--line);
}

.field-list .field-meaning:last-of-type {
  border-bottom: 0;
  padding-bottom: 0;
}

/* 边界列表 */
.boundary-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.boundary-item {
  position: relative;
  padding-left: 18px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.boundary-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 7px;
  height: 7px;
  background-color: var(--accent);
  border-radius: 1px;
}

/* 卡片网格 */
.collection-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

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

.collection-media {
  margin: 0;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: #e7e3da;
}

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

.collection-body {
  padding: 18px 20px 22px;
}

.collection-title,
.collection-name {
  font-size: 17.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.collection-cover,
.collection-desc {
  margin-top: 10px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.collection-meta {
  margin-top: 12px;
  padding-top: 12px;
  border-top: 1px dashed var(--line);
  font-size: 13px;
  color: var(--teal);
  font-family: var(--font-mono);
}

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

.step-item {
  min-width: 0;
  padding-top: 18px;
  border-top: 2px solid var(--accent);
}

.step-index {
  display: block;
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  margin-bottom: 8px;
}

.step-name {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.4;
  color: var(--ink);
}

.step-note,
.step-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 相关入口网格 */
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
  margin-top: 20px;
}

.related-card,
.related-item {
  min-width: 0;
  padding: 18px 20px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-sm);
}

.related-name,
.related-card-title {
  font-size: 16.5px;
  font-weight: 700;
  line-height: 1.45;
}

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

.related-link:hover,
.related-link:focus-visible {
  color: var(--accent);
}

.related-desc,
.related-card-desc,
.related-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
/* 首屏定位区 */
.hero-section {
  padding: 40px 0 46px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.35fr);
  gap: 40px;
  align-items: center;
}

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

.hero-eyebrow {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--teal);
  padding-bottom: 12px;
  border-bottom: 1px solid var(--line-strong);
  margin-bottom: 16px;
}

.hero-title {
  font-size: 38px;
  line-height: 1.24;
  font-weight: 700;
  color: var(--ink);
}

.hero-lead {
  margin-top: 16px;
  font-size: 16px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 34em;
}

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

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

.hero-figure img {
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  border-radius: var(--radius);
  border: 1px solid var(--line);
}

.hero-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* 题材频道速览 */
.channel-rows {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.channel-row {
  display: grid;
  grid-template-columns: 84px minmax(140px, 200px) minmax(0, 1fr);
  gap: 20px;
  align-items: baseline;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
}

.channel-row:hover {
  background-color: #f1eee7;
}

.channel-code {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}

.channel-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.5;
}

.channel-cover {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 浏览顺序四步（首页） */
.browse-steps .step-list {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

/* 整理记录速览 */
.record-months {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
}

.record-month {
  min-width: 0;
  padding-top: 16px;
  border-top: 1px solid var(--line-strong);
}

.month-name,
.record-month .record-month {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--teal);
  font-family: var(--font-mono);
  margin-bottom: 12px;
}

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

.month-item {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  padding-left: 14px;
  position: relative;
}

.month-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background-color: var(--line-strong);
}

/* 站内栏目索引 */
.index-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

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

.index-link {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 6px;
  min-height: 88px;
  padding: 14px 16px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-size: 15px;
  font-weight: 700;
  line-height: 1.4;
}

.index-link:hover,
.index-link:focus-visible {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

.index-desc {
  font-size: 12.5px;
  font-weight: 400;
  line-height: 1.6;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   pages · 内页通用
   -------------------------------------------------------------------------- */
.page-layout {
  max-width: var(--wrap);
  margin: 0 auto;
  padding: 34px 24px 0;
  min-width: 0;
}

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

.content-section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

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

/* 频道总览（题材频道页） */
.channel-overview {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.channel-overview .channel-rows {
  counter-reset: channel;
}

.channel-overview .channel-row {
  grid-template-columns: 120px 84px minmax(0, 1fr);
  gap: 20px;
  align-items: start;
  padding: 18px 4px;
}

.channel-thumb {
  margin: 0;
  width: 120px;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-sm);
  background-color: #e7e3da;
}

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

.channel-overview .channel-code {
  padding-top: 4px;
}

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

.channel-desc {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.channel-notes {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.note-block {
  min-width: 0;
}

.note-text {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

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

.note-item {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.note-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--teal);
  border-radius: 1px;
}

/* 相关入口区块 */
.related-entry,
.related-section,
.section-related {
  padding: 34px 0 0;
}

/* 专题片单页 */
.section-collections {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.section-pick {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

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

.tip-item {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.tip-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--accent);
  border-radius: 1px;
}

.section-pick .two-column {
  margin-top: 20px;
}

/* 浏览指引页 */
.guide-section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

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

.goal-body {
  margin-top: 14px;
}

.guide-figure {
  margin: 22px 0 0;
  min-width: 0;
}

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

.guide-figure figcaption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.condition-item {
  min-width: 0;
  padding: 16px 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.condition-name {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.condition-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.guide-steps .step-list {
  margin-top: 20px;
  grid-template-columns: minmax(0, 1fr);
  gap: 0;
}

.guide-steps .step-item {
  display: grid;
  grid-template-columns: 52px minmax(0, 1fr);
  grid-template-areas:
    "index name"
    "index text";
  gap: 4px 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.guide-steps .step-index {
  grid-area: index;
  margin: 0;
  padding-top: 3px;
}

.guide-steps .step-name {
  grid-area: name;
}

.guide-steps .step-text {
  grid-area: text;
  margin-top: 4px;
}

.guide-check .check-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
}

.check-item {
  min-width: 0;
  padding-top: 14px;
  border-top: 2px solid var(--teal);
}

.check-name {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.check-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.guide-boundary .boundary-columns {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
}

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

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

.case-item {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.case-item::before {
  content: "×";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--accent);
  font-weight: 700;
}

.boundary-text {
  font-size: 14.5px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.boundary-text + .boundary-text {
  margin-top: 10px;
}

.guide-related .related-list {
  margin-top: 18px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--gap);
}

/* 字段说明页 */
.section-fields-table .section-media {
  margin: 22px 0 26px;
  min-width: 0;
}

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

.media-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

.section-fields-table .field-list {
  border-top: 1px solid var(--line-strong);
}

.field-row {
  display: grid;
  grid-template-columns: minmax(150px, 220px) minmax(0, 1fr);
  gap: 20px;
  padding: 16px 4px;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.field-row:hover {
  background-color: #f1eee7;
}

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

.field-code {
  font-family: var(--font-mono);
}

.field-row .field-desc {
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
  min-width: 0;
}

.section-pair {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: var(--gap);
  border-top: 1px solid var(--line);
}

.section-pair .content-section {
  border-bottom: 0;
}

.scope-block {
  margin-top: 18px;
}

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

.scope-list li {
  position: relative;
  padding-left: 16px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

.scope-covered .scope-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  background-color: var(--teal);
  border-radius: 1px;
}

.scope-excluded .scope-list li::before {
  content: "—";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--line-strong);
}

.misuse-list {
  margin-top: 18px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.misuse-item {
  min-width: 0;
  padding-left: 14px;
  border-left: 2px solid var(--line-strong);
}

.misuse-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--ink);
}

.misuse-text {
  margin-top: 6px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink-soft);
}

/* 整理记录页 */
.records-section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.record-group {
  padding: 22px 0;
  border-top: 1px solid var(--line);
}

.record-group:first-of-type {
  border-top: 0;
}

.record-month {
  font-size: 16px;
  font-weight: 700;
  font-family: var(--font-mono);
  color: var(--teal);
  margin-bottom: 14px;
}

.record-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.record-item {
  min-width: 0;
  padding: 14px 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
}

.record-scope {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
}

.record-text {
  margin-top: 8px;
  font-size: 14.5px;
  line-height: 1.8;
  color: var(--ink);
}

.record-impact {
  margin-top: 8px;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
  font-size: 13.5px;
  line-height: 1.75;
  color: var(--ink-soft);
}

.records-note-section {
  padding: 34px 0;
  border-bottom: 1px solid var(--line);
}

.note-layout {
  margin-top: 20px;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1.2fr);
  gap: var(--gap);
  align-items: start;
}

.note-figure {
  margin: 0;
  min-width: 0;
}

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

.note-caption {
  margin-top: 10px;
  font-size: 13px;
  line-height: 1.7;
  color: var(--ink-soft);
}

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

.note-body p {
  font-size: 15px;
  line-height: 1.85;
  color: var(--ink-soft);
}

.note-body p + p {
  margin-top: 12px;
}

.note-body .note-list {
  margin-top: 16px;
}

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

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

.error-panel {
  padding: 48px 0 40px;
  border-bottom: 1px solid var(--line);
}

.error-code {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--accent);
}

.error-title {
  margin-top: 12px;
  font-size: 32px;
  line-height: 1.3;
  font-weight: 700;
  color: var(--ink);
}

.error-text {
  margin-top: 12px;
  font-size: 15.5px;
  line-height: 1.85;
  color: var(--ink-soft);
  max-width: 46em;
}

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

.error-links {
  padding: 34px 0 0;
}

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

.error-link-item {
  min-width: 0;
  padding: 14px 18px;
  background-color: var(--surface);
  border: 1px solid var(--line);
  border-left: 3px solid var(--teal);
  border-radius: var(--radius-sm);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.error-link {
  font-size: 15.5px;
  font-weight: 700;
  color: var(--ink);
}

.error-link:hover,
.error-link:focus-visible {
  color: var(--accent);
}

.error-link-note {
  font-size: 13.5px;
  line-height: 1.7;
  color: var(--ink-soft);
}

/* --------------------------------------------------------------------------
   responsive · 断点
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

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

  .hero-title {
    font-size: 32px;
  }

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

@media (max-width: 768px) {
  body {
    font-size: 15.5px;
  }

  .topline-bar,
  .top-notice,
  .top-tip,
  .top-line-bar {
    padding: 10px 16px;
  }

  .top-notice {
    justify-content: flex-start;
    gap: 12px;
  }

  .utility-inner {
    padding: 8px 16px;
    justify-content: flex-start;
  }

  .header-inner {
    padding: 12px 16px;
    gap: 12px;
  }

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    flex: 1 0 100%;
    order: 3;
  }

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

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

  .nav-link {
    width: 100%;
    min-height: 48px;
    padding: 0 10px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    justify-content: flex-start;
  }

  .nav-link.is-current {
    border-bottom-color: var(--line);
    border-left: 3px solid var(--accent);
    padding-left: 12px;
  }

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

  .page-header {
    padding: 18px 16px 22px;
  }

  .page-title {
    font-size: 25px;
  }

  .page-description {
    font-size: 15px;
  }

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

  .page-layout {
    padding: 26px 16px 0;
  }

  .section {
    padding: 34px 0;
  }

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

  .hero-section {
    padding: 28px 0 34px;
  }

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

  .hero-title {
    font-size: 27px;
  }

  .hero-lead {
    font-size: 15.5px;
  }

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

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

  .channel-row,
  .channel-overview .channel-row {
    grid-template-columns: minmax(0, 1fr);
    gap: 8px;
    padding: 16px 0;
  }

  .channel-thumb {
    width: 100%;
    max-width: 240px;
    aspect-ratio: 16 / 9;
  }

  .channel-overview .channel-code {
    padding-top: 0;
  }

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

  .step-list,
  .browse-steps .step-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 18px;
  }

  .two-column {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
  }

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

  .index-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 12px;
  }

  .index-link {
    min-height: 76px;
    padding: 12px 14px;
    font-size: 14.5px;
  }

  .channel-notes {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 26px 0;
  }

  .guide-conditions .condition-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 14px;
  }

  .guide-steps .step-item {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 4px 12px;
  }

  .guide-check .check-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

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

  .guide-related .related-list {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

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

  .section-pair .content-section {
    border-bottom: 1px solid var(--line);
  }

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

  .note-layout {
    grid-template-columns: minmax(0, 1fr);
    gap: 22px;
  }

  .related-grid {
    grid-template-columns: minmax(0, 1fr);
    gap: 16px;
  }

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

  .error-title {
    font-size: 25px;
  }

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

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

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 34px 16px 24px;
  }

  .footer-copy {
    padding: 14px 16px 20px;
  }
}

@media (max-width: 420px) {
  .utility-inner {
    gap: 6px 14px;
  }

  .utility-link,
  .utility-lang,
  .utility-status,
  .utility-item {
    font-size: 12.5px;
  }

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

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

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

/* 动效增强：仅在支持滚动的浏览器中做轻量出现，不影响初始可见 */
@media (prefers-reduced-motion: no-preference) {
  .collection-card,
  .related-card,
  .related-item,
  .record-item,
  .condition-item,
  .check-item {
    transition: border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
  }

  .collection-card:hover,
  .related-card:hover,
  .related-item:hover,
  .record-item:hover,
  .condition-item:hover {
    border-color: var(--line-strong);
    background-color: #fffefb;
  }
}