/* ==========================================================================
   飘花飘雪电影 · 全站样式表
   分组：base / layout / components / pages / responsive
   ========================================================================== */

/* --------------------------------------------------------------------------
   base · 变量与基础重置
   -------------------------------------------------------------------------- */
:root {
  --bg-base: #f6f7f5;
  --bg-panel: #ffffff;
  --ink-main: #1f2320;
  --ink-sub: #5c635e;
  --accent: #2f6f5e;
  --accent-dark: #275c4e;
  --accent-soft: #e6efeb;
  --line: #e2e5e1;
  --radius: 6px;
  --shell-width: 1180px;
  --shell-pad: 24px;
}

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

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

body {
  margin: 0;
  background: var(--bg-base);
  color: var(--ink-main);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Source Han Sans SC", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  font-weight: 400;
}

h1,
h2,
h3,
h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.35;
  color: var(--ink-main);
}

p {
  margin: 0;
}

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

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

a:hover,
a:focus {
  text-decoration: underline;
}

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

figure {
  margin: 0;
}

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

button {
  font: inherit;
  color: inherit;
}

.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 · 全站骨架：页头 / 导航 / 主容器 / 页脚
   -------------------------------------------------------------------------- */
.site-body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: var(--bg-base);
  color: var(--ink-main);
}

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

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

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  color: var(--ink-main);
  text-decoration: none;
}

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

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: var(--radius);
  background: var(--accent);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  flex: 0 0 auto;
}

.brand-slogan {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink-main);
  white-space: nowrap;
}

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

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

.nav-list > li > a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  font-size: 15px;
  color: var(--ink-sub);
  border-bottom: 2px solid transparent;
  text-decoration: none;
}

.nav-list > li > a:hover,
.nav-list > li > a:focus {
  color: var(--ink-main);
  border-bottom-color: var(--line);
  text-decoration: none;
}

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

.nav-toggle {
  display: none;
  margin-left: auto;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-panel);
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle-bar {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--ink-main);
  border-radius: 1px;
}

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

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

.site-footer {
  background: var(--bg-panel);
  border-top: 1px solid var(--line);
  color: var(--ink-sub);
}

.footer-inner {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 40px var(--shell-pad) 28px;
  display: grid;
  grid-template-columns: minmax(240px, 1fr) minmax(0, 2.2fr);
  gap: 32px 40px;
  align-items: start;
}

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

.footer-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-main);
  margin-bottom: 8px;
}

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

.footer-nav {
  display: grid;
  grid-template-columns: repeat(4, minmax(140px, 1fr));
  gap: 24px;
}

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

.footer-group-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-main);
  margin-bottom: 10px;
}

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

.footer-group a {
  font-size: 14px;
  color: var(--ink-sub);
  text-decoration: none;
}

.footer-group a:hover,
.footer-group a:focus {
  color: var(--accent);
  text-decoration: underline;
}

.footer-note {
  grid-column: 1 / -1;
  border-top: 1px solid var(--line);
  padding-top: 18px;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 24px;
  justify-content: space-between;
  font-size: 13px;
  color: var(--ink-sub);
}

.footer-copy {
  font-size: 13px;
  color: var(--ink-sub);
}

/* --------------------------------------------------------------------------
   layout · 内页外壳：面包屑 / 页面标题区 / 双栏
   -------------------------------------------------------------------------- */
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
  padding: 20px 0 0;
  font-size: 14px;
  color: var(--ink-sub);
}

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

.breadcrumb a:hover,
.breadcrumb a:focus {
  color: var(--accent);
  text-decoration: underline;
}

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

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

.page-header {
  padding: 14px 0 24px;
  border-bottom: 1px solid var(--line);
  margin-bottom: 32px;
}

.page-title {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
  color: var(--ink-main);
}

.page-description {
  margin-top: 12px;
  max-width: 780px;
  font-size: 16px;
  color: var(--ink-sub);
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(220px, 280px);
  gap: 40px;
  align-items: start;
}

.page-layout.sidebar-left {
  grid-template-columns: minmax(220px, 260px) minmax(0, 1fr);
}

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

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

/* --------------------------------------------------------------------------
   components · 通用区块头 / 卡片 / 表格 / 列表
   -------------------------------------------------------------------------- */
.section {
  margin-bottom: 48px;
}

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

.section-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--ink-main);
}

.section-lead,
.section-intro {
  margin-top: 10px;
  max-width: 820px;
  font-size: 15px;
  color: var(--ink-sub);
}

.section-footnote {
  margin-top: 20px;
  font-size: 14px;
  color: var(--ink-sub);
}

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

.section-footnote a:hover,
.section-footnote a:focus {
  text-decoration: underline;
}

.media-figure,
.channel-figure,
.section-media,
.hero-figure,
.channel-row-media,
.playlist-media {
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--bg-panel);
  border: 1px solid var(--line);
}

.media-figure img,
.channel-figure img,
.section-media img,
.hero-figure img,
.channel-row-media img,
.playlist-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-figure figcaption,
.channel-figure figcaption,
.section-media figcaption,
.hero-figure figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-sub);
  border-top: 1px solid var(--line);
  background: var(--bg-panel);
}

/* 调整记录列表（频道页 / 字段页 / 路径页共用） */
.log-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.log-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) minmax(120px, 200px);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

.log-date {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-main);
}

.log-content,
.log-text {
  font-size: 15px;
  color: var(--ink-sub);
}

.log-scope {
  font-size: 13px;
  color: var(--ink-sub);
  text-align: right;
}

/* 并列两栏说明（片单页 / 字段页 / 频道页共用） */
.path-columns,
.boundary-columns,
.marking-columns,
.relation-columns {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.path-col,
.boundary-col,
.marking-column,
.relation-column {
  min-width: 0;
  padding: 20px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-col-title,
.boundary-col-title,
.marking-title,
.relation-column-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.path-col p,
.boundary-col p,
.marking-column p,
.relation-column p {
  font-size: 15px;
  color: var(--ink-sub);
}

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

.boundary-list li {
  position: relative;
  padding-left: 16px;
  font-size: 15px;
  color: var(--ink-sub);
}

.boundary-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 11px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

/* 侧栏区块（片单页） */
.aside-block {
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 20px;
}

.aside-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

.aside-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.aside-links a {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  font-size: 14px;
  color: var(--ink-sub);
  text-decoration: none;
}

.aside-links a:hover,
.aside-links a:focus {
  color: var(--accent);
  text-decoration: underline;
}

/* --------------------------------------------------------------------------
   pages · index.html 首页
   -------------------------------------------------------------------------- */
.home-main {
  max-width: var(--shell-width);
  margin: 0 auto;
  padding: 0 var(--shell-pad) 56px;
}

/* 首屏双通道定位区 */
.hero {
  padding: 40px 0 48px;
  border-bottom: 1px solid var(--line);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(300px, 1fr);
  gap: 40px;
  align-items: start;
}

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

.hero-kicker {
  display: inline-block;
  padding: 4px 10px;
  margin-bottom: 14px;
  border-radius: var(--radius);
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13px;
  font-weight: 600;
}

.hero-title {
  font-size: 32px;
  font-weight: 600;
  line-height: 1.3;
}

.hero-text {
  margin-top: 14px;
  max-width: 640px;
  font-size: 16px;
  color: var(--ink-sub);
}

.hero-steps {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.hero-step {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 14px 16px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.hero-step .step-index {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font-size: 13px;
  font-weight: 600;
}

.hero-step .step-body {
  font-size: 15px;
  color: var(--ink-sub);
}

.hero-aside {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

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

.hero-shortcut {
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.shortcut-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

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

.shortcut-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--bg-base);
  font-size: 15px;
  color: var(--ink-main);
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.shortcut-list a:hover,
.shortcut-list a:focus {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
  text-decoration: none;
}

/* 题材频道方向总览 */
.channels {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.channel-table {
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(140px, 200px) minmax(0, 1fr) minmax(0, 1.2fr);
  gap: 16px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--line);
  align-items: center;
}

.channel-row:last-child {
  border-bottom: 0;
}

.channel-row-head {
  background: var(--bg-base);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-sub);
}

.channel-cell {
  min-width: 0;
  font-size: 15px;
  color: var(--ink-sub);
}

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

.channel-name a {
  color: var(--ink-main);
  text-decoration: none;
}

.channel-name a:hover,
.channel-name a:focus {
  color: var(--accent);
  text-decoration: underline;
}

.channel-tone {
  color: var(--ink-main);
}

.channel-media {
  margin-top: 24px;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--bg-panel);
}

.channel-media img {
  width: 100%;
  aspect-ratio: 21 / 8;
  object-fit: cover;
}

.channel-media figcaption {
  padding: 10px 14px;
  font-size: 13px;
  color: var(--ink-sub);
  border-top: 1px solid var(--line);
}

/* 本期专题片单速览 */
.playlists {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.playlist-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
}

.playlist-card {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 20px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.playlist-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.playlist-name {
  font-size: 17px;
  font-weight: 600;
}

.playlist-name a {
  color: var(--ink-main);
  text-decoration: none;
}

.playlist-name a:hover,
.playlist-name a:focus {
  color: var(--accent);
  text-decoration: underline;
}

.playlist-tone {
  font-size: 15px;
  color: var(--ink-main);
}

.playlist-scope,
.playlist-tag {
  font-size: 14px;
  color: var(--ink-sub);
}

.playlist-tag {
  margin-top: auto;
  padding-top: 10px;
  border-top: 1px solid var(--line);
}

/* 条目字段与收录边界摘要 */
.fields {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.fields-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(240px, 1fr);
  gap: 28px;
  align-items: start;
}

.fields-table-wrap {
  min-width: 0;
  overflow-x: auto;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.fields-table {
  min-width: 480px;
}

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

.fields-table th,
.fields-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
}

.fields-table thead th {
  background: var(--bg-base);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-sub);
}

.fields-table tbody th {
  font-weight: 600;
  color: var(--ink-main);
}

.fields-table tbody td {
  color: var(--ink-sub);
}

.fields-table tbody tr:last-child th,
.fields-table tbody tr:last-child td {
  border-bottom: 0;
}

.fields-boundary {
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

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

.boundary-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.boundary-text {
  font-size: 15px;
  color: var(--ink-sub);
}

/* 查阅路径三步概览 */
.path {
  padding: 48px 0;
  border-bottom: 1px solid var(--line);
}

.path-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.path-item {
  display: grid;
  grid-template-columns: 40px minmax(140px, 220px) minmax(0, 1fr);
  gap: 16px;
  align-items: start;
  padding: 16px 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.path-index {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 14px;
  font-weight: 600;
}

.path-name {
  font-size: 16px;
  font-weight: 600;
}

.path-basis {
  font-size: 15px;
  color: var(--ink-sub);
}

.path-more {
  margin-top: 20px;
  font-size: 15px;
}

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

.path-more a:hover,
.path-more a:focus {
  text-decoration: underline;
}

/* 站内收录范围调整记录 */
.records {
  padding: 48px 0 8px;
}

.record-list {
  display: flex;
  flex-direction: column;
  border-top: 1px solid var(--line);
}

.record-item {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr) minmax(140px, 220px);
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--line);
  align-items: start;
}

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

.record-text {
  font-size: 15px;
  color: var(--ink-main);
}

.record-impact {
  font-size: 13px;
  color: var(--ink-sub);
  text-align: right;
}

/* --------------------------------------------------------------------------
   pages · channel.html 题材频道
   -------------------------------------------------------------------------- */
.channel-anchor {
  position: sticky;
  top: 88px;
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.anchor-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.anchor-list a {
  display: flex;
  align-items: center;
  min-height: 36px;
  padding: 0 10px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--ink-sub);
  text-decoration: none;
}

.anchor-list a:hover,
.anchor-list a:focus {
  background: var(--accent-soft);
  color: var(--accent);
  text-decoration: none;
}

.anchor-note {
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--ink-sub);
}

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

.anchor-note a:hover,
.anchor-note a:focus {
  text-decoration: underline;
}

.section-channel-basis .channel-figure {
  margin-bottom: 24px;
}

.channel-figure img {
  width: 100%;
  aspect-ratio: 21 / 8;
}

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

.basis-point {
  min-width: 0;
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.basis-point-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.basis-point p {
  font-size: 15px;
  color: var(--ink-sub);
}

.channel-row {
  display: grid;
  grid-template-columns: minmax(200px, 280px) minmax(0, 1fr);
  gap: 24px;
  padding: 20px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 18px;
  align-items: start;
  scroll-margin-top: 88px;
}

.channel-row-media {
  min-width: 0;
}

.channel-row-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
}

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

.channel-row-name {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.channel-row-fields {
  display: grid;
  grid-template-columns: minmax(80px, 110px) minmax(0, 1fr);
  gap: 8px 16px;
  margin: 0;
}

.channel-row-fields dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-main);
}

.channel-row-fields dd {
  margin: 0;
  font-size: 15px;
  color: var(--ink-sub);
}

/* --------------------------------------------------------------------------
   pages · playlist.html 专题片单
   -------------------------------------------------------------------------- */
.playlist-rules .rule-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.rule-item {
  min-width: 0;
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.rule-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.rule-desc {
  font-size: 15px;
  color: var(--ink-sub);
}

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

.playlist-list-section .playlist-card {
  padding: 0;
  gap: 0;
  overflow: hidden;
}

.playlist-media {
  border: 0;
  border-bottom: 1px solid var(--line);
  border-radius: 0;
}

.playlist-media img {
  width: 100%;
  aspect-ratio: 16 / 9;
}

.playlist-list-section .playlist-name {
  padding: 16px 18px 6px;
}

.playlist-meta {
  display: grid;
  grid-template-columns: minmax(80px, 100px) minmax(0, 1fr);
  gap: 6px 14px;
  margin: 0;
  padding: 0 18px 18px;
}

.playlist-meta dt {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-main);
}

.playlist-meta dd {
  margin: 0;
  font-size: 14px;
  color: var(--ink-sub);
}

/* --------------------------------------------------------------------------
   pages · field-guide.html 条目字段说明
   -------------------------------------------------------------------------- */
.field-figure {
  margin-bottom: 24px;
}

.field-figure img {
  width: 100%;
  aspect-ratio: 21 / 8;
}

.table-scroll {
  overflow-x: auto;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.field-table {
  min-width: 560px;
}

.field-table th,
.field-table td {
  padding: 12px 16px;
  text-align: left;
  font-size: 14px;
  border-bottom: 1px solid var(--line);
}

.field-table thead th {
  background: var(--bg-base);
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-sub);
}

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

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

.field-table tbody tr:last-child th,
.field-table tbody tr:last-child td {
  border-bottom: 0;
}

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

.key-field-item {
  min-width: 0;
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.key-field-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.key-field-rule {
  font-size: 15px;
  color: var(--ink-main);
}

.key-field-example {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-sub);
}

.field-log .log-item {
  grid-template-columns: minmax(110px, 150px) minmax(0, 1fr);
}

.field-log .log-date {
  font-size: 14px;
  font-weight: 600;
  color: var(--ink-main);
}

.field-log .log-content {
  font-size: 15px;
  color: var(--ink-main);
}

.field-log .log-scope {
  grid-column: 1 / -1;
  font-size: 13px;
  color: var(--ink-sub);
  text-align: left;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.related-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--ink-main);
  text-decoration: none;
  transition: border-color 0.18s ease, transform 0.18s ease;
}

.related-list a:hover,
.related-list a:focus {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
  text-decoration: none;
}

/* --------------------------------------------------------------------------
   pages · reading-path.html 查阅路径指引
   -------------------------------------------------------------------------- */
.step-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.step-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-item .step-index {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--accent);
  color: #ffffff;
  font-size: 14px;
  font-weight: 600;
}

.step-item .step-body {
  min-width: 0;
}

.step-name {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.step-action {
  font-size: 15px;
  color: var(--ink-main);
}

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

.step-action a:hover,
.step-action a:focus {
  text-decoration: underline;
}

.step-basis {
  margin-top: 6px;
  font-size: 14px;
  color: var(--ink-sub);
}

.section-step-detail .section-media {
  margin-bottom: 24px;
}

.section-media img {
  width: 100%;
  aspect-ratio: 21 / 8;
}

.step-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.step-detail {
  min-width: 0;
  padding: 18px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.step-detail-name {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-detail-basis {
  font-size: 15px;
  color: var(--ink-main);
}

.step-detail-block {
  margin-top: 8px;
  font-size: 14px;
  color: var(--ink-sub);
}

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

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

.faq-question {
  display: flex;
  align-items: center;
  min-height: 52px;
  padding: 14px 18px;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink-main);
  cursor: pointer;
  list-style: none;
}

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

.faq-question::after {
  content: "+";
  margin-left: auto;
  padding-left: 16px;
  font-size: 18px;
  font-weight: 600;
  color: var(--accent);
}

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

.faq-answer {
  padding: 0 18px 18px;
}

.faq-answer p {
  font-size: 15px;
  color: var(--ink-sub);
}

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

.error-block {
  padding: 40px 32px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  text-align: center;
}

.error-block h1 {
  font-size: 32px;
  font-weight: 600;
}

.error-block p {
  margin-top: 12px;
  font-size: 16px;
  color: var(--ink-sub);
}

.error-home-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  margin-top: 22px;
  padding: 0 24px;
  border-radius: var(--radius);
  background: var(--accent);
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.error-home-link:hover,
.error-home-link:focus {
  background: var(--accent-dark);
  text-decoration: none;
}

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

.error-guide h2 {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 18px;
}

.error-entry-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 14px;
}

.error-entry-list a {
  display: flex;
  align-items: center;
  min-height: 44px;
  padding: 0 16px;
  background: var(--bg-panel);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--ink-main);
  text-decoration: none;
}

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

/* --------------------------------------------------------------------------
   responsive · 断点 1024 / 768 / 480
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: minmax(0, 1fr);
    gap: 28px;
  }

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

  .page-layout,
  .page-layout.sidebar-left {
    grid-template-columns: minmax(0, 1fr);
    gap: 32px;
  }

  .channel-anchor {
    position: static;
  }

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

  .footer-nav {
    grid-template-columns: repeat(2, minmax(140px, 1fr));
  }
}

@media (max-width: 768px) {
  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 10px 16px;
    min-height: 60px;
    gap: 12px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    left: 0;
    right: 0;
    top: 100%;
    background: var(--bg-panel);
    border-bottom: 1px solid var(--line);
    padding: 8px 16px 16px;
    margin-left: 0;
    box-shadow: 0 8px 16px rgba(31, 35, 32, 0.06);
  }

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

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

  .nav-list > li > a {
    min-height: 48px;
    padding: 0 4px;
    border-bottom: 1px solid var(--line);
    font-size: 16px;
  }

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

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

  .inner-main,
  .home-main {
    padding: 0 16px 40px;
  }

  .breadcrumb {
    padding-top: 16px;
    font-size: 13px;
  }

  .page-header {
    padding: 12px 0 18px;
    margin-bottom: 24px;
  }

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

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

  .section {
    margin-bottom: 36px;
  }

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

  .hero {
    padding: 28px 0 32px;
  }

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

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

  .hero-step {
    padding: 12px 14px;
  }

  .channels,
  .playlists,
  .fields,
  .path {
    padding: 32px 0;
  }

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

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

  .channel-tone {
    font-size: 15px;
  }

  .channel-scope {
    font-size: 14px;
  }

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

  .playlist-grid,
  .playlist-list-section .playlist-grid,
  .rule-list,
  .key-field-grid,
  .basis-points,
  .path-columns,
  .boundary-columns,
  .marking-columns,
  .relation-columns {
    grid-template-columns: minmax(0, 1fr);
  }

  .path-item {
    grid-template-columns: 32px minmax(0, 1fr);
    gap: 10px 12px;
    padding: 14px;
  }

  .path-item .path-basis {
    grid-column: 2 / -1;
  }

  .record-item,
  .log-item,
  .field-log .log-item {
    grid-template-columns: minmax(0, 1fr);
    gap: 6px;
  }

  .record-impact,
  .log-scope {
    text-align: left;
  }

  .channel-row-fields,
  .playlist-meta {
    grid-template-columns: minmax(72px, 92px) minmax(0, 1fr);
  }

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

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

  .footer-inner {
    padding: 32px 16px 24px;
  }

  .footer-nav {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 20px 16px;
  }

  .footer-note {
    flex-direction: column;
    gap: 6px;
  }

  .error-main {
    padding: 32px 16px 48px;
  }

  .error-block {
    padding: 28px 20px;
  }

  .error-block h1 {
    font-size: 24px;
  }
}

@media (max-width: 480px) {
  .brand-slogan {
    font-size: 15px;
  }

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

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

  .step-item .step-index,
  .hero-step .step-index {
    width: 26px;
    height: 26px;
    font-size: 13px;
  }

  .faq-question {
    padding: 12px 14px;
    font-size: 15px;
  }

  .faq-answer {
    padding: 0 14px 16px;
  }

  .path-col,
  .boundary-col,
  .marking-column,
  .relation-column,
  .basis-point,
  .key-field-item,
  .step-detail,
  .rule-item {
    padding: 16px;
  }
}