/* ==========================================================================
   飘花影院在线观看 · 全站样式
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础元素
   -------------------------------------------------------------------------- */
:root {
  --bg-page: #f7f6f3;
  --bg-card: #ffffff;
  --bg-soft: #f1efea;
  --ink: #1f1e1c;
  --ink-mid: #6b6862;
  --ink-soft: #8c8880;
  --accent: #8a5a2b;
  --accent-soft: #f0e6da;
  --footer-bg: #2b2a28;
  --footer-ink: #e9e6e0;
  --footer-ink-mid: #a9a49b;
  --line: #e6e3dd;
  --line-strong: #d5d1c8;
  --radius: 6px;
  --radius-sm: 4px;
  --shell: 1180px;
  --shell-narrow: 960px;
  --gutter: 24px;
  --shadow-card: 0 1px 2px rgba(31, 30, 28, 0.05);
  --font-serif: "Noto Serif SC", "Songti SC", "SimSun", Georgia, serif;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

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

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

body {
  margin: 0;
  padding: 0;
  background-color: var(--bg-page);
  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 {
  margin: 0 0 0.6em;
  font-family: var(--font-serif);
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink);
}

h1 {
  font-size: 2rem;
}

h2 {
  font-size: 1.5rem;
}

h3 {
  font-size: 1.125rem;
}

p {
  margin: 0 0 1em;
}

ul,
ol {
  margin: 0 0 1em;
  padding-left: 1.25em;
}

li {
  margin-bottom: 0.35em;
}

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

a:hover {
  color: #6d4520;
  text-decoration: underline;
}

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 2px;
}

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

figure {
  margin: 0;
}

figcaption {
  margin-top: 0.5em;
  font-size: 0.8125rem;
  color: var(--ink-mid);
}

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

caption {
  padding-bottom: 0.6em;
  font-size: 0.875rem;
  color: var(--ink-mid);
  text-align: left;
}

th,
td {
  padding: 0.7em 0.9em;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  font-size: 0.9375rem;
}

th {
  background-color: var(--bg-soft);
  font-weight: 600;
}

dt {
  font-weight: 600;
}

dd {
  margin: 0 0 0.6em;
}

[id] {
  scroll-margin-top: 92px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 10px 16px;
  background-color: var(--bg-card);
  color: var(--ink);
  z-index: 60;
}

.skip-link:focus {
  left: 12px;
  top: 12px;
}

/* --------------------------------------------------------------------------
   layout · 页头 / 导航 / 主容器 / 页脚
   -------------------------------------------------------------------------- */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background-color: var(--bg-page);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 40;
  background-color: rgba(247, 246, 243, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: saturate(140%) blur(6px);
}

.header-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 12px var(--gutter);
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 64px;
}

.brand {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 2px;
  color: var(--ink);
  flex: 0 0 auto;
}

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

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.1875rem;
  font-weight: 600;
  line-height: 1.2;
}

.brand-slogan {
  font-size: 0.75rem;
  color: var(--ink-mid);
  line-height: 1.3;
}

.site-nav {
  margin-left: auto;
}

.nav-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-list li {
  margin: 0;
}

.nav-list a {
  display: block;
  padding: 9px 12px;
  font-size: 0.9375rem;
  color: var(--ink-mid);
  border-bottom: 2px solid transparent;
  border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

.nav-list a:hover {
  color: var(--ink);
  background-color: var(--bg-soft);
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  cursor: pointer;
  position: relative;
}

.nav-toggle::before,
.nav-toggle::after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  height: 2px;
  background-color: var(--ink);
}

.nav-toggle::before {
  top: 16px;
  box-shadow: 0 6px 0 var(--ink);
}

.nav-toggle::after {
  top: 28px;
}

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

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

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

.site-footer {
  background-color: var(--footer-bg);
  color: var(--footer-ink);
  margin-top: 24px;
}

.footer-inner {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 40px var(--gutter) 24px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2fr);
  gap: 32px;
}

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

.footer-name {
  font-family: var(--font-serif);
  font-size: 1.0625rem;
  font-weight: 600;
  margin-bottom: 0.5em;
  color: #ffffff;
}

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: var(--footer-ink-mid);
  margin: 0;
}

.footer-nav {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}

.footer-col h3 {
  font-family: var(--font-sans);
  font-size: 0.875rem;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 0.75em;
}

.footer-col ul {
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-col li {
  margin-bottom: 0.5em;
}

.footer-col a {
  color: var(--footer-ink-mid);
  font-size: 0.875rem;
}

.footer-col a:hover {
  color: #ffffff;
}

.footer-copy {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 16px var(--gutter) 28px;
  border-top: 1px solid rgba(255, 255, 255, 0.12);
  font-size: 0.8125rem;
  color: var(--footer-ink-mid);
}

.back-to-top {
  position: fixed;
  right: 18px;
  bottom: 18px;
  z-index: 30;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0;
  background-color: var(--bg-card);
  border: 1px solid var(--line-strong);
  border-radius: 50%;
  box-shadow: var(--shadow-card);
}

.back-to-top::before {
  content: "↑";
  font-size: 1rem;
  color: var(--ink);
  line-height: 1;
}

.back-to-top:hover {
  background-color: var(--accent-soft);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   layout · 内页三栏骨架
   -------------------------------------------------------------------------- */
.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 220px;
  gap: 40px;
  align-items: start;
  padding-top: 24px;
}

.sidebar-left {
  display: grid;
  grid-template-columns: 216px minmax(0, 1fr) 200px;
  gap: 36px;
  align-items: start;
  padding-top: 24px;
}

.page-layout.sidebar-left .page-content,
.sidebar-left .page-content {
  min-width: 0;
}

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

.page-aside,
.page-sidebar,
.page-side,
.page-side-toc {
  min-width: 0;
  font-size: 0.875rem;
}

.page-aside,
.page-sidebar,
.page-side {
  position: sticky;
  top: 88px;
}

.page-aside-right,
.page-side-toc {
  position: sticky;
  top: 88px;
}

.aside-title,
.sidebar-title,
.side-title,
.side-toc-title,
.toc-title,
.side-toc-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 600;
  text-transform: none;
  color: var(--ink-mid);
  padding-bottom: 8px;
  margin: 0 0 12px;
  border-bottom: 1px solid var(--line);
}

.channel-toc,
.sidebar-list,
.page-mini-toc,
.side-list,
.toc-list,
.side-toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.channel-toc li,
.sidebar-list li,
.page-mini-toc li,
.side-list li,
.toc-list li,
.side-toc-list li {
  margin-bottom: 2px;
}

.channel-toc a,
.sidebar-list a,
.page-mini-toc a,
.side-list a,
.toc-list a,
.side-toc-list a {
  display: block;
  padding: 7px 8px;
  color: var(--ink-mid);
  border-left: 2px solid transparent;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  line-height: 1.5;
}

.channel-toc a:hover,
.sidebar-list a:hover,
.page-mini-toc a:hover,
.side-list a:hover,
.toc-list a:hover,
.side-toc-list a:hover {
  color: var(--ink);
  background-color: var(--bg-soft);
  border-left-color: var(--accent);
  text-decoration: none;
}

.sidebar-note,
.aside-note,
.side-toc-note {
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 0.8125rem;
  color: var(--ink-mid);
  line-height: 1.65;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  font-size: 0.8125rem;
  color: var(--ink-mid);
  margin-bottom: 14px;
}

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

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

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

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

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

.page-title {
  font-size: 1.875rem;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.5em;
}

.page-description,
.page-lead {
  max-width: 68ch;
  font-size: 0.9375rem;
  color: var(--ink-mid);
  margin: 0;
}

.page-header-main {
  display: block;
}

/* --------------------------------------------------------------------------
   components · 首页公用件
   -------------------------------------------------------------------------- */
.fact-bar {
  max-width: var(--shell);
  margin: 0 auto;
  padding: 10px var(--gutter);
  font-size: 0.8125rem;
  color: var(--ink-mid);
  background-color: var(--bg-soft);
  border-bottom: 1px solid var(--line);
}

.section-lead,
.section-intro,
.block-lead {
  max-width: 72ch;
  font-size: 0.9375rem;
  color: var(--ink-mid);
  margin: 0 0 20px;
}

.section-more {
  margin: 20px 0 0;
  font-size: 0.9375rem;
}

.section-more a {
  display: inline-block;
  padding: 8px 16px;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm);
  background-color: var(--bg-card);
  color: var(--accent);
  font-weight: 600;
}

.section-more a:hover {
  background-color: var(--accent-soft);
  text-decoration: none;
}

.btn {
  display: inline-block;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
}

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

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

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

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

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

/* 频道行（首页与频道页共用基础字段布局，各自父级限定） */
.channel-list,
.channel-rows {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}

.channel-row {
  display: grid;
  grid-template-columns: 56px minmax(140px, 1fr) minmax(0, 2fr) minmax(120px, 1fr);
  gap: 16px;
  align-items: baseline;
  padding: 16px 8px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.18s ease;
}

.channel-row:hover {
  background-color: var(--bg-card);
}

.channel-no {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--accent);
}

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

.channel-scope {
  color: var(--ink-mid);
  font-size: 0.9375rem;
}

.channel-audience {
  color: var(--ink-soft);
  font-size: 0.875rem;
}

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

.collection-card {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  display: flex;
  flex-direction: column;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.collection-card:hover {
  border-color: var(--line-strong);
  transform: translateY(-2px);
}

.collection-media {
  margin: 0;
  aspect-ratio: 16 / 9;
  background-color: var(--bg-soft);
}

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

.collection-card figcaption {
  padding: 14px 18px 0;
  margin: 0;
}

.collection-name,
.collection-title {
  padding: 0 18px;
  margin: 6px 0 0.4em;
  font-size: 1.0625rem;
}

.collection-desc {
  padding: 0 18px;
  margin: 0 0 1em;
  font-size: 0.9375rem;
  color: var(--ink-mid);
}

.collection-link {
  margin: auto 18px 18px;
  align-self: flex-start;
  font-size: 0.9375rem;
  font-weight: 600;
}

.collection-meta {
  padding: 0 18px 18px;
  margin: auto 0 0;
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

/* 步骤条 */
.step-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.step-item {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 18px;
  margin: 0;
}

.browse-steps .step-no {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
}

.step-name {
  font-size: 1rem;
  margin-bottom: 0.4em;
}

.step-desc {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  margin-bottom: 0.6em;
}

.step-check,
.step-note {
  font-size: 0.8125rem;
  color: var(--ink-soft);
  margin: 0;
  padding-top: 8px;
  border-top: 1px dashed var(--line);
}

/* 字段与边界两栏 */
.field-boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.field-col,
.boundary-col {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px 22px 10px;
}

.field-col h3,
.boundary-col h3 {
  font-size: 1rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.field-list,
.boundary-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.field-list li,
.boundary-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 0.9375rem;
  color: var(--ink-mid);
  margin: 0;
}

.field-list li:last-child,
.boundary-list li:last-child {
  border-bottom: none;
}

.field-name {
  display: block;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 2px;
}

/* 整理记录速览 */
.records-preview .record-stage {
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.records-preview .record-stage:last-of-type {
  border-bottom: none;
}

.record-stage-name {
  font-size: 1rem;
  margin-bottom: 0.6em;
}

.record-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.records-preview .record-item {
  display: grid;
  grid-template-columns: 96px minmax(0, 1fr);
  gap: 14px;
  align-items: baseline;
  padding: 8px 0;
  margin: 0;
  font-size: 0.9375rem;
}

.record-tag {
  font-size: 0.8125rem;
  color: var(--accent);
  background-color: var(--accent-soft);
  border-radius: 2px;
  padding: 2px 8px;
  text-align: center;
}

.records-preview .record-item p {
  margin: 0;
  color: var(--ink-mid);
}

/* 站内栏目索引 */
.index-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
}

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

.index-col h3 {
  font-size: 0.9375rem;
  margin-bottom: 0.4em;
}

.index-col h3 a {
  color: var(--ink);
}

.index-col h3 a:hover {
  color: var(--accent);
}

.index-col p {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--ink-mid);
  line-height: 1.65;
}

/* --------------------------------------------------------------------------
   pages · 首页
   -------------------------------------------------------------------------- */
.home-main > section {
  padding: 44px 0;
  border-bottom: 1px solid var(--line);
}

.home-main > section:last-of-type {
  border-bottom: none;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 1fr);
  gap: 40px;
  align-items: center;
  padding-top: 48px !important;
}

.hero-title {
  font-size: 2.25rem;
  margin-bottom: 0.5em;
}

.hero-lead {
  max-width: 46ch;
  font-size: 1rem;
  color: var(--ink-mid);
  margin-bottom: 1.4em;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 1.2em;
}

.hero-boundary {
  font-size: 0.8125rem;
  color: var(--ink-soft);
  padding: 10px 14px;
  background-color: var(--bg-soft);
  border-left: 3px solid var(--accent);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 0;
}

.hero-media {
  margin: 0;
}

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

.intro-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
}

.intro-grid p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-mid);
}

/* --------------------------------------------------------------------------
   pages · 题材频道（channels.html）
   -------------------------------------------------------------------------- */
.channel-overview {
  margin-bottom: 40px;
}

.channel-overview > p {
  max-width: 72ch;
  color: var(--ink-mid);
  font-size: 0.9375rem;
}

.channel-rows .channel-row {
  grid-template-columns: 48px minmax(120px, 0.9fr) minmax(0, 2fr) minmax(110px, 1fr);
}

.channel-detail {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.channel-detail h2 {
  font-size: 1.25rem;
}

.channel-detail > p {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  max-width: 74ch;
}

.channel-figure {
  margin: 0 0 16px;
  max-width: 640px;
}

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

.channel-mapping {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.mapping-list {
  border-top: 1px solid var(--line);
  margin: 16px 0;
}

.mapping-row {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 32px minmax(0, 1fr);
  gap: 12px;
  align-items: center;
  padding: 12px 8px;
  border-bottom: 1px solid var(--line);
  font-size: 0.9375rem;
}

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

.mapping-arrow {
  text-align: center;
  color: var(--accent);
}

.mapping-collection {
  color: var(--ink-mid);
}

.mapping-note {
  font-size: 0.875rem;
  color: var(--ink-mid);
}

.channel-gallery {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

/* --------------------------------------------------------------------------
   pages · 专题片单（collections.html）
   -------------------------------------------------------------------------- */
.page-collections .page-header {
  display: block;
}

.page-header-toc {
  margin-top: 18px;
  padding: 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.toc-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
}

.toc-list a {
  color: var(--ink-mid);
  border-bottom: 1px solid transparent;
  padding: 2px 0;
}

.toc-list a:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
  background: none;
  text-decoration: none;
}

.content-section {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.content-section:first-of-type {
  border-top: none;
  padding-top: 8px;
}

.page-collections .collection-card {
  margin: 0;
}

.page-collections .collection-card figcaption {
  padding: 14px 18px 18px;
}

.logic-block {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px;
  margin-bottom: 18px;
}

.logic-block h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.6em;
}

.logic-fields {
  margin: 0;
  display: grid;
  grid-template-columns: 132px minmax(0, 1fr);
  gap: 6px 16px;
  font-size: 0.9375rem;
}

.logic-fields dt {
  color: var(--ink);
}

.logic-fields dd {
  margin: 0;
  color: var(--ink-mid);
}

.mapping-table {
  margin-top: 12px;
}

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

.notes-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.note-item {
  padding: 16px 0;
  border-bottom: 1px dashed var(--line);
}

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

.note-item h3 {
  font-size: 1rem;
  margin-bottom: 0.35em;
}

.note-item p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-mid);
}

/* --------------------------------------------------------------------------
   pages · 观看指南（guide.html）
   -------------------------------------------------------------------------- */
.guide-steps,
.guide-fields,
.guide-boundary,
.guide-faq {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.guide-steps {
  border-top: none;
  padding-top: 8px;
}

.section-title {
  font-size: 1.25rem;
}

.guide-figure {
  margin: 0 0 22px;
  max-width: 620px;
}

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

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

.guide-steps .step-item {
  border-left: 3px solid var(--accent-soft);
}

.field-table-wrap {
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background-color: var(--bg-card);
}

.field-table {
  min-width: 460px;
}

.field-table th,
.field-table td {
  border: none;
  border-bottom: 1px solid var(--line);
}

.field-table tbody tr:last-child td {
  border-bottom: none;
}

.field-table th:first-child,
.field-table td:first-child {
  width: 34%;
  font-weight: 600;
  color: var(--ink);
}

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

.boundary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.guide-boundary .boundary-col {
  padding: 20px 22px 8px;
}

.boundary-heading {
  font-size: 1rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.boundary-in .boundary-heading {
  color: var(--accent);
}

.boundary-out .boundary-heading {
  color: var(--ink-mid);
}

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

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

.faq-question {
  cursor: pointer;
  list-style: none;
  padding: 15px 44px 15px 18px;
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--ink);
  position: relative;
}

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

.faq-question::after {
  content: "+";
  position: absolute;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 1.125rem;
  color: var(--accent);
  line-height: 1;
}

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

.faq-question:hover {
  background-color: var(--bg-soft);
}

.faq-answer {
  padding: 0 18px 16px;
  font-size: 0.9375rem;
  color: var(--ink-mid);
}

.faq-answer p {
  margin: 0 0 0.6em;
}

.faq-answer p:last-child {
  margin-bottom: 0;
}

.feedback-note {
  margin-top: 24px;
  padding: 18px 20px;
  background-color: var(--bg-soft);
  border-radius: var(--radius);
}

.feedback-title {
  font-size: 1rem;
  margin-bottom: 0.4em;
}

.feedback-note p {
  margin: 0;
  font-size: 0.9375rem;
  color: var(--ink-mid);
}

/* --------------------------------------------------------------------------
   pages · 整理记录（records.html）
   -------------------------------------------------------------------------- */
.page-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 32px;
  margin: 18px 0 0;
}

.meta-item {
  margin: 0;
}

.meta-item dt {
  font-size: 0.75rem;
  color: var(--ink-soft);
  font-weight: 400;
}

.meta-item dd {
  margin: 0;
  font-size: 0.875rem;
  color: var(--ink);
}

.records-block {
  padding: 28px 0;
  border-top: 1px solid var(--line);
}

.records-block:first-of-type {
  border-top: none;
  padding-top: 8px;
}

.record-media {
  margin: 0 0 20px;
  max-width: 620px;
}

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

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

.page-records .record-item {
  padding: 16px 8px;
  border-bottom: 1px solid var(--line);
  margin: 0;
}

.record-title {
  font-size: 1rem;
  margin-bottom: 0.35em;
}

.record-summary {
  margin: 0 0 0.5em;
  font-size: 0.9375rem;
  color: var(--ink-mid);
}

.record-tags {
  margin: 0;
  font-size: 0.8125rem;
  color: var(--ink-soft);
}

.archive-group {
  padding: 18px 0;
  border-bottom: 1px dashed var(--line);
}

.archive-group:last-child {
  border-bottom: none;
}

.archive-stage {
  font-size: 1rem;
  margin-bottom: 0.6em;
}

.archive-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.archive-list li {
  padding: 6px 0 6px 16px;
  position: relative;
  font-size: 0.9375rem;
  color: var(--ink-mid);
  margin: 0;
}

.archive-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 16px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent);
}

.scope-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.scope-col {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px 22px 8px;
}

.scope-col h3 {
  font-size: 1rem;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.scope-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.scope-list li {
  padding: 10px 0;
  border-bottom: 1px dashed var(--line);
  font-size: 0.9375rem;
  color: var(--ink-mid);
  margin: 0;
}

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

.scope-foot {
  margin-top: 18px;
  font-size: 0.875rem;
}

/* --------------------------------------------------------------------------
   pages · 404
   -------------------------------------------------------------------------- */
.error-main {
  max-width: var(--shell-narrow);
  margin: 0 auto;
  padding: 56px var(--gutter) 64px;
}

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

.error-code {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 600;
  color: var(--accent);
  margin: 0 0 0.2em;
  line-height: 1;
}

.error-hero h1 {
  font-size: 1.75rem;
}

.error-lead {
  font-size: 1rem;
  color: var(--ink-mid);
  max-width: 52ch;
}

.error-note {
  font-size: 0.875rem;
  color: var(--ink-soft);
  max-width: 56ch;
}

.error-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 20px;
}

.error-btn-primary,
.error-btn-plain {
  display: inline-block;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 600;
}

.error-btn-primary {
  background-color: var(--ink);
  color: #ffffff;
}

.error-btn-primary:hover {
  background-color: var(--accent);
  color: #ffffff;
  text-decoration: none;
}

.error-btn-plain {
  border: 1px solid var(--line-strong);
  color: var(--ink);
}

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

.error-guide {
  padding-top: 32px;
}

.error-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.error-list li {
  margin: 0;
}

.error-list a {
  display: block;
  padding: 16px 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--ink);
  font-weight: 600;
  font-size: 0.9375rem;
}

.error-list a:hover {
  border-color: var(--accent);
  color: var(--accent);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   responsive · 1024px
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 28px;
  }

  .page-layout {
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: 28px;
  }

  .page-aside-right,
  .page-side-toc {
    position: static;
    grid-column: 1 / -1;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px solid var(--line);
  }

  .page-aside-right .page-mini-toc,
  .page-side-toc .side-toc-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 18px;
  }

  .page-aside-right .page-mini-toc a,
  .page-side-toc .side-toc-list a {
    border-left: none;
    border-bottom: 1px solid transparent;
    padding: 4px 0;
  }

  .page-header-toc .toc-list {
    gap: 6px 18px;
  }

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

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

  .channel-row,
  .channel-rows .channel-row {
    grid-template-columns: 44px minmax(120px, 1fr) minmax(0, 2fr);
  }

  .channel-row .channel-audience {
    grid-column: 2 / -1;
  }
}

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

  .header-inner {
    padding: 10px 16px;
    gap: 12px;
    flex-wrap: wrap;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    flex-basis: 100%;
    margin-left: 0;
  }

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

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

  .nav-list a {
    padding: 13px 8px;
    font-size: 1rem;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .nav-list a.is-current {
    border-bottom-color: var(--line);
    background-color: var(--accent-soft);
  }

  .home-main,
  .inner-main {
    padding-left: 16px;
    padding-right: 16px;
  }

  .fact-bar {
    padding: 10px 16px;
  }

  .hero {
    grid-template-columns: minmax(0, 1fr);
    gap: 24px;
    padding-top: 32px !important;
  }

  .hero-copy {
    order: 1;
  }

  .hero-media {
    order: 2;
  }

  .hero-title {
    font-size: 1.625rem;
  }

  .home-main > section {
    padding: 32px 0;
  }

  .intro-grid,
  .collection-grid,
  .field-boundary-grid,
  .boundary-grid,
  .scope-columns {
    grid-template-columns: minmax(0, 1fr);
  }

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

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

  /* 内页：侧栏折叠为顶部横向标签，正文在前 */
  .page-layout,
  .sidebar-left {
    display: block;
    padding-top: 16px;
  }

  .page-aside,
  .page-sidebar,
  .page-side,
  .page-side-toc,
  .page-aside-right {
    position: static;
    margin-bottom: 20px;
    padding: 14px 16px;
    background-color: var(--bg-card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
  }

  .page-aside-right,
  .page-side-toc {
    margin-top: 28px;
    margin-bottom: 0;
  }

  .channel-toc,
  .sidebar-list,
  .page-mini-toc,
  .side-list,
  .toc-list,
  .side-toc-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px 8px;
  }

  .channel-toc li,
  .sidebar-list li,
  .page-mini-toc li,
  .side-list li,
  .toc-list li,
  .side-toc-list li {
    margin: 0;
  }

  .channel-toc a,
  .sidebar-list a,
  .page-mini-toc a,
  .side-list a,
  .toc-list a,
  .side-toc-list a {
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: 7px 14px;
    font-size: 0.875rem;
    background-color: var(--bg-page);
  }

  .channel-toc a:hover,
  .sidebar-list a:hover,
  .page-mini-toc a:hover,
  .side-list a:hover,
  .toc-list a:hover,
  .side-toc-list a:hover {
    border-color: var(--accent);
    background-color: var(--accent-soft);
  }

  .page-title {
    font-size: 1.5rem;
  }

  .channel-row,
  .channel-rows .channel-row {
    grid-template-columns: 40px minmax(0, 1fr);
    gap: 8px 12px;
    padding: 14px 4px;
  }

  .channel-row .channel-no {
    grid-row: 1 / 3;
  }

  .channel-row .channel-scope,
  .channel-row .channel-audience {
    grid-column: 2 / -1;
  }

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

  .mapping-arrow {
    text-align: left;
  }

  .logic-fields {
    grid-template-columns: minmax(0, 1fr);
    gap: 2px 0;
  }

  .logic-fields dt {
    margin-top: 8px;
  }

  .records-preview .record-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 4px;
  }

  .record-tag {
    display: inline-block;
    justify-self: start;
  }

  .footer-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 26px;
    padding: 32px 16px 20px;
  }

  .footer-brand {
    max-width: none;
  }

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

  .footer-copy {
    padding: 14px 16px 24px;
  }

  .error-main {
    padding: 40px 16px 48px;
  }

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

  .back-to-top {
    right: 12px;
    bottom: 12px;
  }
}

/* --------------------------------------------------------------------------
   responsive · 480px
   -------------------------------------------------------------------------- */
@media (max-width: 480px) {
  .index-grid {
    grid-template-columns: minmax(0, 1fr);
  }

  .hero-title {
    font-size: 1.5rem;
  }

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

  .hero-actions .btn {
    text-align: center;
    min-height: 44px;
  }

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

  .field-table {
    min-width: 380px;
  }
}

/* --------------------------------------------------------------------------
   motion · 轻量淡入（不影响初始可见性）
   -------------------------------------------------------------------------- */
@media (prefers-reduced-motion: no-preference) {
  .collection-card,
  .index-col,
  .step-item {
    transition: transform 0.2s ease, border-color 0.2s ease;
  }
}