/* ============================================================
   糖心 · feiyue1931.com 全站样式
   瑞士网格编辑室风：冷静无衬线、8点栅格、固定比例图片、编号章节
   ============================================================ */

/* ============================================================
   BASE — 基础变量、重置、排版
   ============================================================ */
:root {
  --color-ink: #0B1F2A;
  --color-paper: #F6F4EF;
  --color-accent: #F2A33C;
  --color-body: #5B6B77;
  --color-line: #DFE5E8;
  --color-white: #FFFFFF;
  --color-ink-soft: #1E3542;
  --color-accent-deep: #D9821F;

  --font-sans: "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", "Source Han Sans SC", Inter, system-ui, -apple-system, sans-serif;

  --container-w: 1200px;
  --sidebar-w: 300px;
  --radius: 6px;
  --radius-card: 8px;
  --header-h: 64px;
  --space-unit: 8px;
  --transition: 0.2s ease;
}

*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

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

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

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  color: var(--color-ink);
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: 40px;
  letter-spacing: 0.02em;
}

h2 {
  font-size: 26px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

/* 视觉隐藏，保留可读性 */
.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;
}

/* 通用文字链接 */
.text-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
  line-height: 1.6;
  transition: color var(--transition), border-color var(--transition);
}

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

.text-link::after {
  content: " →";
  font-weight: 400;
}

/* ============================================================
   LAYOUT — 页头、页脚、全站栅格
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-ink);
  min-height: var(--header-h);
}

.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: var(--header-h);
}

.brand-link {
  display: inline-flex;
  align-items: center;
  color: var(--color-white);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

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

.brand-name {
  display: inline-block;
}

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid rgba(255, 255, 255, 0.35);
  border-radius: var(--radius);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  padding: 10px 16px;
  cursor: pointer;
  min-height: 44px;
  line-height: 1.3;
}

.nav-toggle-label {
  pointer-events: none;
}

.site-nav {
  display: block;
}

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

.nav-list li a {
  display: block;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: var(--radius);
  line-height: 1.5;
  min-height: 40px;
  transition: background-color var(--transition), color var(--transition);
}

.nav-list li a:hover {
  color: var(--color-white);
  background-color: rgba(255, 255, 255, 0.08);
}

.nav-list li a.is-current {
  color: var(--color-white);
  background-color: rgba(242, 163, 60, 0.18);
}

/* ---- 页脚 ---- */
.site-footer {
  background-color: var(--color-ink);
  color: rgba(255, 255, 255, 0.65);
  margin-top: 80px;
}

.footer-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 56px 24px 32px;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
}

.footer-brand-name {
  color: var(--color-white);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

.footer-brand-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.55);
}

.footer-col-title {
  color: var(--color-white);
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  line-height: 1.6;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 18px 24px;
}

.copyright {
  max-width: var(--container-w);
  margin: 0 auto;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  text-align: left;
}

/* ---- 通用 main ---- */
.site-main {
  min-height: 60vh;
}

/* 面包屑 */
.breadcrumb {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 18px 24px 0;
  font-size: 13px;
  color: var(--color-body);
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
}

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

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

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

.breadcrumb-current {
  color: var(--color-ink);
  font-weight: 500;
}

/* 内页页头 */
.page-header {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 32px 24px 24px;
}

.page-description {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  color: var(--color-accent-deep);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.page-title {
  font-size: 36px;
  line-height: 1.25;
  margin-bottom: 14px;
}

.page-lead,
.page-intro {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-body);
  max-width: 720px;
}

/* ============================================================
   COMPONENTS — 通用组件
   ============================================================ */

/* ---- 章节标题区 ---- */
.section-heading {
  margin-bottom: 32px;
}

.section-kicker {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--color-accent-deep);
  margin-bottom: 8px;
}

.section-title {
  font-size: 28px;
  line-height: 1.3;
  margin-bottom: 10px;
}

.section-note {
  font-size: 15px;
  color: var(--color-body);
  line-height: 1.7;
  max-width: 640px;
}

/* ---- 编号按钮 ---- */
.btn-primary,
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

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

.btn-primary:hover {
  background-color: var(--color-accent-deep);
  color: var(--color-white);
}

.btn-secondary {
  background-color: var(--color-ink);
  color: var(--color-white);
}

.btn-secondary:hover {
  background-color: var(--color-ink-soft);
  color: var(--color-white);
}

/* ---- FAQ 折叠项 ---- */
.faq-item {
  border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
  cursor: pointer;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-ink);
  padding: 18px 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  transition: color var(--transition);
}

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

.faq-item summary::after {
  content: "+";
  font-size: 24px;
  font-weight: 400;
  color: var(--color-accent-deep);
  flex-shrink: 0;
  transition: transform var(--transition);
}

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

.faq-item summary:hover {
  color: var(--color-accent-deep);
}

.faq-answer {
  padding: 0 0 20px;
  font-size: 15px;
  line-height: 1.75;
  color: var(--color-body);
}

.faq-answer p {
  margin-bottom: 10px;
}

/* ---- 边界提示 ---- */
.boundary-note {
  max-width: var(--container-w);
  margin: 48px auto;
  padding: 0 24px;
}

.boundary-text {
  background-color: #EAF0F2;
  border-left: 3px solid var(--color-accent);
  padding: 16px 24px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-ink-soft);
  border-radius: 0 var(--radius) var(--radius) 0;
}

/* ---- 编辑推荐区 ---- */
.editor-picks {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 48px 24px 0;
}

.pick-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.pick-item {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 24px;
  min-height: 100px;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.pick-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(11, 31, 42, 0.06);
}

.pick-title {
  display: block;
  font-weight: 700;
  font-size: 17px;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.pick-desc {
  display: block;
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.6;
}

/* ============================================================
   PAGES — 首页
   ============================================================ */
.home-main {
  overflow: visible;
}

/* ---- Hero 全宽主视觉 ---- */
.hero-banner {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

.hero-banner::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(11, 31, 42, 0.88) 0%, rgba(11, 31, 42, 0.55) 55%, rgba(11, 31, 42, 0.25) 100%);
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 80px 24px;
  width: 100%;
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.hero-title {
  font-size: 44px;
  line-height: 1.2;
  color: var(--color-white);
  max-width: 640px;
  margin-bottom: 18px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.85);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.hero-actions .btn-primary,
.hero-actions .btn-secondary {
  min-width: 160px;
}

/* ---- 编号入口条 ---- */
.entry-strip {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  position: relative;
  z-index: 3;
  margin-top: -1px;
}

.entry-item {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  min-height: 160px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.entry-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 20px rgba(11, 31, 42, 0.06);
  transform: translateY(-2px);
}

.entry-number {
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-deep);
  letter-spacing: 0.08em;
  margin-bottom: 10px;
}

.entry-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 8px;
  display: block;
}

.entry-desc {
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.6;
  margin-top: auto;
}

/* ---- 观看习惯判断区 ---- */
.decision-zone {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px 0;
}

.decision-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.decision-col {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 32px;
}

.decision-title {
  font-size: 20px;
  margin-bottom: 14px;
  position: relative;
  padding-left: 36px;
}

.decision-title::before {
  content: attr(data-index);
  position: absolute;
  left: 0;
  top: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent-deep);
}

.decision-text {
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 18px;
}

/* ---- 频道速览 ---- */
.channel-preview {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px 0;
}

.channel-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.channel-mini-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 24px 20px;
  min-height: 180px;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.channel-mini-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(11, 31, 42, 0.05);
}

.channel-code {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent-deep);
  margin-bottom: 8px;
}

.channel-name {
  font-size: 18px;
  margin-bottom: 8px;
}

.channel-tags {
  font-size: 13px;
  color: var(--color-body);
  margin-bottom: 8px;
}

.channel-fit {
  font-size: 13px;
  color: var(--color-body);
  line-height: 1.6;
  margin-bottom: 12px;
}

.card-link {
  margin-top: auto;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
}

.card-link::after {
  content: " →";
}

/* ---- 主推片单 ---- */
.featured-playlists {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 64px 24px 0;
}

.playlist-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.playlist-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.playlist-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 6px 24px rgba(11, 31, 42, 0.07);
}

.playlist-figure {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-line);
}

.playlist-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.playlist-card:hover .playlist-figure img {
  transform: scale(1.03);
}

.playlist-body {
  padding: 20px 20px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.playlist-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent-deep);
  text-transform: uppercase;
  margin-bottom: 6px;
}

.playlist-name {
  font-size: 18px;
  margin-bottom: 10px;
}

.playlist-desc {
  font-size: 14px;
  line-height: 1.65;
  color: var(--color-body);
  margin-bottom: 10px;
}

.playlist-order {
  font-size: 13px;
  color: var(--color-body);
  line-height: 1.6;
  border-left: 2px solid var(--color-line);
  padding-left: 12px;
  margin-bottom: 16px;
}

.playlist-body .text-link {
  margin-top: auto;
  align-self: flex-start;
}

/* ---- FAQ 预览 ---- */
.faq-preview {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 56px 24px 0;
}

.faq-preview-list {
  max-width: 760px;
}

.faq-preview .btn-secondary {
  margin-top: 20px;
}

/* ============================================================
   PAGES — 内页通用双栏骨架
   ============================================================ */
.inner-main {
  padding-bottom: 48px;
}

/* ---------- 频道页 channels ---------- */
.page-layout {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-w);
  gap: 48px;
  align-items: start;
}

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

/* 频道引言 */
.channel-intro {
  margin-bottom: 48px;
}

.channel-intro .section-title {
  font-size: 24px;
}

.intro-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 16px;
}

.tag {
  display: inline-block;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: 100px;
  padding: 5px 14px;
  font-size: 13px;
  color: var(--color-ink-soft);
}

/* 频道网格 */
.channel-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 48px;
}

.channel-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition);
}

.channel-card:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(11, 31, 42, 0.05);
}

.channel-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background-color: var(--color-line);
}

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

.channel-body {
  padding: 20px 20px 22px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.channel-number {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent-deep);
  margin-bottom: 6px;
}

.channel-name {
  font-size: 20px;
  margin-bottom: 6px;
}

.channel-tags {
  font-size: 13px;
  color: var(--color-body);
  margin-bottom: 10px;
}

.channel-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-body);
  margin-bottom: 14px;
}

.channel-body .text-link {
  margin-top: auto;
  align-self: flex-start;
}

/* 频道与片单关系 */
.relation-block {
  margin-bottom: 48px;
}

.relation-block .section-title {
  font-size: 24px;
}

.relation-list {
  margin-top: 16px;
}

.relation-list li {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
  font-size: 15px;
  line-height: 1.7;
}

.relation-list a {
  font-weight: 600;
  color: var(--color-ink);
}

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

/* 三种浏览路径 */
.path-section {
  margin-bottom: 48px;
}

.path-section .section-title {
  font-size: 24px;
}

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

.path-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 4px 20px;
  align-items: start;
}

.path-index {
  grid-row: 1 / 4;
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-deep);
  line-height: 1.4;
}

.path-name {
  font-size: 17px;
  margin-bottom: 6px;
}

.path-item p {
  font-size: 14px;
  line-height: 1.65;
  grid-column: 2;
  margin-bottom: 6px;
}

.path-item a.text-link {
  grid-column: 2;
  justify-self: start;
}

/* 频道页编辑推荐 */
.editor-picks {
  padding-top: 0;
}

.editor-picks p {
  font-size: 15px;
  margin-bottom: 16px;
}

.editor-picks ul li {
  padding: 8px 0;
  border-bottom: 1px solid var(--color-line);
}

.editor-picks a {
  font-weight: 600;
  font-size: 15px;
}

.editor-picks a::after {
  content: " →";
  font-weight: 400;
}

/* ---- 侧栏（通用右侧摘要） ---- */
.sidebar,
.aside-summary,
.guide-aside,
.page-aside,
.aside-col {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  min-width: 0;
}

.sidebar-card,
.summary-card,
.aside-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 24px;
}

.sidebar-title,
.summary-title,
.aside-title,
.aside-eyebrow {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.08em;
  color: var(--color-ink);
  margin-bottom: 18px;
  text-transform: uppercase;
}

.sidebar-links li,
.summary-list li {
  margin-bottom: 4px;
}

.sidebar-links a,
.summary-list a {
  display: block;
  padding: 8px 10px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
  border-left: 2px solid transparent;
  transition: background-color var(--transition), color var(--transition), border-color var(--transition);
}

.sidebar-links a:hover,
.summary-list a:hover {
  background-color: rgba(242, 163, 60, 0.08);
  color: var(--color-ink);
  border-left-color: var(--color-accent);
}

.sidebar-note,
.summary-tip,
.aside-note {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-body);
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px solid var(--color-line);
}

.sidebar-cta,
.summary-link,
.aside-link {
  display: inline-block;
  margin-top: 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

.sidebar-cta::after,
.summary-link::after,
.aside-link::after {
  content: " →";
}

/* ============================================================
   PAGES — 专题片单页 playlists
   ============================================================ */
.playlist-feature,
.playlist-season,
.playlist-backstage {
  margin-bottom: 56px;
}

.playlist-feature-media,
.season-media,
.backstage-media {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-card);
  margin-bottom: 20px;
  background-color: var(--color-line);
}

.playlist-feature-media img,
.season-media img,
.backstage-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.playlist-index {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent-deep);
  margin-bottom: 6px;
}

.playlist-feature h2,
.playlist-season h2,
.playlist-backstage h2 {
  font-size: 24px;
  margin-bottom: 8px;
}

.playlist-tagline {
  font-size: 15px;
  color: var(--color-body);
  margin-bottom: 20px;
  font-style: normal;
}

.playlist-content-block {
  margin-bottom: 18px;
  padding: 18px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
}

.playlist-content-block h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.playlist-content-block p {
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 0;
}

/* 季节时间线 */
.season-timeline {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-bottom: 24px;
}

.season-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 16px;
}

.season-name {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent-deep);
  margin-bottom: 4px;
}

.season-theme {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 6px;
}

.season-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-body);
  margin-bottom: 0;
}

/* 幕后步骤 */
.backstage-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.backstage-step {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 20px;
}

.step-label {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent-deep);
  margin-bottom: 6px;
}

.backstage-step h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.backstage-step p {
  font-size: 13px;
  line-height: 1.65;
  margin-bottom: 0;
}

/* 使用提示 */
.playlist-usage {
  margin-bottom: 40px;
}

.playlist-usage > h2 {
  font-size: 24px;
  margin-bottom: 20px;
}

.usage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.usage-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 20px;
}

.usage-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
}

.usage-item p {
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 0;
}

.usage-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--color-body);
}

.usage-note a {
  font-weight: 600;
  color: var(--color-ink);
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 2px;
}

/* 片单页边界提示 */
.playlists .boundary-note {
  margin-top: 0;
}

/* 摘要栏链接 */
.summary-list li a.is-active {
  background-color: rgba(242, 163, 60, 0.08);
  color: var(--color-ink);
  border-left-color: var(--color-accent);
}

/* ============================================================
   PAGES — 观看指南 guide
   ============================================================ */
.guide-section {
  margin-bottom: 48px;
}

.guide-section .section-title {
  font-size: 24px;
}

.section-intro {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}

/* 到达路径 */
.route-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.route-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 20px;
}

.route-number {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-accent-deep);
  margin-bottom: 8px;
}

.route-title {
  font-size: 16px;
  margin-bottom: 8px;
}

.route-desc {
  font-size: 14px;
  line-height: 1.65;
  margin-bottom: 0;
}

/* 封面信息 */
.cover-figure {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  border-radius: var(--radius-card);
  margin-bottom: 20px;
  background-color: var(--color-line);
}

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

.cover-figure figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background-color: rgba(11, 31, 42, 0.75);
  color: var(--color-white);
  font-size: 13px;
  padding: 8px 16px;
  line-height: 1.5;
}

.cover-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.cover-point {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 16px 18px;
}

.point-key {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.point-desc {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-body);
  margin-bottom: 0;
}

/* 设备差异 */
.device-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.device-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 24px;
}

.device-title {
  font-size: 17px;
  margin-bottom: 12px;
}

.device-list li {
  position: relative;
  padding-left: 20px;
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 8px;
}

.device-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--color-accent);
}

/* 异常自查 */
.check-list {
  counter-reset: check-counter;
}

.check-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 18px 20px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 4px 16px;
  align-items: start;
  position: relative;
}

.check-item::before {
  counter-increment: check-counter;
  content: counter(check-counter, decimal-leading-zero);
  grid-row: 1 / 3;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent-deep);
  line-height: 1.6;
  padding-top: 2px;
}

.check-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.5;
  margin-bottom: 4px;
}

.check-desc {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-body);
  margin-bottom: 0;
  min-width: 0;
}

/* 下一步 */
.next-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.next-link {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 18px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.next-link::after {
  content: " →";
  font-weight: 400;
}

.next-link:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(11, 31, 42, 0.05);
}

/* 指南侧栏步骤 */
.guide-aside .aside-card {
  padding: 24px;
}

.aside-title {
  font-size: 14px;
}

.aside-list {
  counter-reset: aside-counter;
}

.aside-list li {
  margin-bottom: 4px;
}

.aside-list a {
  display: flex;
  align-items: baseline;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--color-body);
  line-height: 1.5;
  border-left: 2px solid transparent;
}

.aside-list a::before {
  counter-increment: aside-counter;
  content: counter(aside-counter, decimal-leading-zero);
  font-size: 13px;
  font-weight: 700;
  color: var(--color-accent-deep);
  font-variant-numeric: tabular-nums;
}

.aside-list a:hover {
  background-color: rgba(242, 163, 60, 0.08);
  color: var(--color-ink);
  border-left-color: var(--color-accent);
}

/* 相关链接 */
.related-links {
  max-width: var(--container-w);
  margin: 32px auto 0;
  padding: 20px 24px;
  border-top: 1px solid var(--color-line);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 20px;
}

.related-links-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-body);
}

.related-links-item {
  display: inline-block;
  padding: 6px 14px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: 100px;
  font-size: 13px;
  color: var(--color-ink);
  transition: border-color var(--transition), color var(--transition);
}

.related-links-item:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-deep);
}

/* ============================================================
   PAGES — FAQ 页
   ============================================================ */
.layout-shell {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-w);
  gap: 48px;
  align-items: start;
}

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

.faq-section {
  margin-bottom: 40px;
}

.faq-section > h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.faq-section .section-intro {
  font-size: 15px;
  margin-bottom: 16px;
}

/* FAQ 侧栏 */
.aside-eyebrow {
  margin-bottom: 6px;
  color: var(--color-accent-deep);
  font-size: 12px;
}

.aside-card h2 {
  font-size: 18px;
  margin-bottom: 16px;
}

.scene-item {
  padding: 12px 0;
  border-bottom: 1px solid var(--color-line);
}

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

.scene-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 4px;
}

.scene-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-body);
  margin-bottom: 6px;
}

.scene-item a {
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent-deep);
}

.scene-item a::after {
  content: " →";
}

.aside-figure {
  margin-top: 24px;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: var(--color-line);
}

.aside-figure img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
}

.aside-figure figcaption {
  font-size: 12px;
  color: var(--color-body);
  padding: 8px 12px;
  background-color: var(--color-white);
  line-height: 1.5;
}

/* 观看边界通栏 */
.boundary-strip {
  max-width: var(--container-w);
  margin: 16px auto 0;
  padding: 0 24px;
}

.boundary-strip p {
  background-color: var(--color-ink);
  color: var(--color-white);
  padding: 20px 28px;
  border-radius: var(--radius-card);
  font-size: 15px;
  line-height: 1.7;
  text-align: left;
  margin-bottom: 0;
}

/* ============================================================
   PAGES — 关于页 about
   ============================================================ */
.page-content-column {
  min-width: 0;
}

.content-section {
  margin-bottom: 48px;
}

.content-section .section-heading {
  display: flex;
  align-items: baseline;
  gap: 16px;
  margin-bottom: 16px;
}

.section-number {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent-deep);
  letter-spacing: 0.06em;
  flex-shrink: 0;
}

.content-section .section-title {
  font-size: 24px;
  margin-bottom: 0;
}

.section-text {
  font-size: 15px;
  line-height: 1.8;
  color: var(--color-body);
  margin-bottom: 16px;
}

.content-figure {
  margin: 24px 0;
  border-radius: var(--radius-card);
  overflow: hidden;
  background-color: var(--color-line);
}

.content-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
}

.content-figure figcaption {
  font-size: 13px;
  color: var(--color-body);
  padding: 10px 16px;
  background-color: var(--color-white);
  line-height: 1.6;
}

/* 编选原则 */
.principle-list {
  margin-top: 20px;
}

.principle-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 20px 24px;
  margin-bottom: 12px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 4px 16px;
  align-items: start;
}

.principle-item::before {
  content: attr(data-index);
  grid-row: 1 / 3;
  font-size: 14px;
  font-weight: 700;
  color: var(--color-accent-deep);
  line-height: 1.6;
  padding-top: 2px;
}

.principle-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-ink);
  line-height: 1.5;
  margin-bottom: 4px;
}

.principle-text {
  font-size: 14px;
  line-height: 1.7;
  color: var(--color-body);
  margin-bottom: 0;
}

/* 服务边界清单 */
.boundary-list {
  margin-top: 20px;
}

.boundary-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 16px 20px;
  margin-bottom: 10px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-body);
}

.boundary-item strong {
  display: block;
  color: var(--color-ink);
  font-size: 15px;
  margin-bottom: 2px;
}

/* 出口链接 */
.exit-link-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.exit-link-list a {
  display: block;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-card);
  padding: 16px 20px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-ink);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.exit-link-list a::after {
  content: " →";
  font-weight: 400;
}

.exit-link-list a:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(11, 31, 42, 0.05);
}

/* 关于页侧栏 */
.page-aside {
  padding-top: 0;
}

.aside-item {
  padding: 10px 0;
  border-bottom: 1px solid var(--color-line);
}

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

.aside-item-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-ink);
  margin-bottom: 2px;
}

.aside-item-text {
  font-size: 13px;
  line-height: 1.6;
  color: var(--color-body);
  margin-bottom: 0;
}

/* ============================================================
   PAGES — 404 页
   ============================================================ */
.error-main {
  min-height: calc(100vh - var(--header-h) - 260px);
  display: flex;
  align-items: center;
  justify-content: center;
}

.error-content {
  text-align: left;
  padding: 48px 24px;
  max-width: 640px;
}

.error-code {
  font-size: 64px;
  font-weight: 700;
  line-height: 1;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.error-content h1 {
  font-size: 28px;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 16px;
  line-height: 1.75;
  color: var(--color-body);
  margin-bottom: 24px;
}

.back-home-btn {
  display: inline-block;
  background-color: var(--color-ink);
  color: var(--color-white);
  padding: 12px 28px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  min-height: 48px;
  line-height: 1.4;
  border: none;
  cursor: pointer;
  transition: background-color var(--transition);
}

.back-home-btn:hover {
  background-color: var(--color-ink-soft);
  color: var(--color-white);
}

.back-home-btn::after {
  content: " →";
  font-weight: 400;
}

.error-help {
  margin-top: 20px;
  font-size: 14px;
  color: var(--color-body);
  display: flex;
  flex-wrap: wrap;
  gap: 8px 20px;
  align-items: center;
}

.error-help a {
  color: var(--color-ink);
  font-weight: 600;
  border-bottom: 1px solid var(--color-accent);
  padding-bottom: 1px;
}

/* ============================================================
   RESPONSIVE — 断点适配
   ============================================================ */

/* ---------- 1024px 以下 ---------- */
@media (max-width: 1024px) {
  .footer-inner {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }

  .page-layout,
  .layout-shell {
    grid-template-columns: 1fr 260px;
    gap: 32px;
  }
}

/* ---------- 900px 以下 ---------- */
@media (max-width: 900px) {
  .entry-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .channel-strip {
    grid-template-columns: repeat(2, 1fr);
  }

  .playlist-cards {
    grid-template-columns: 1fr;
    max-width: 560px;
  }

  .decision-grid {
    grid-template-columns: 1fr;
  }

  .pick-links {
    grid-template-columns: 1fr;
  }

  /* 双栏收成单栏 */
  .page-layout,
  .layout-shell {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .content-main,
  .content-column,
  .content-col,
  .page-content-column {
    order: 1;
  }

  .sidebar,
  .aside-summary,
  .guide-aside,
  .page-aside,
  .aside-col {
    position: static;
    order: 2;
    margin-top: 40px;
  }

  /* 指南页摘要要放在正文之前 */
  .guide-aside {
    order: 0;
    margin-top: 0;
    margin-bottom: 32px;
  }

  .guide-section {
    order: 1;
  }

  .related-links {
    order: 3;
  }

  .route-grid,
  .usage-grid,
  .backstage-steps {
    grid-template-columns: 1fr 1fr;
  }

  .season-timeline {
    grid-template-columns: repeat(2, 1fr);
  }

  .device-grid,
  .cover-points {
    grid-template-columns: 1fr;
  }

  .channel-grid {
    grid-template-columns: 1fr;
  }

  .exit-link-list {
    grid-template-columns: 1fr;
  }
}

/* ---------- 720px 以下（主移动断点） ---------- */
@media (max-width: 720px) {
  :root {
    --header-h: 56px;
  }

  body {
    font-size: 15px;
  }

  h1 {
    font-size: 30px;
  }

  h2 {
    font-size: 22px;
  }

  .header-inner {
    padding: 0 16px;
    min-height: var(--header-h);
  }

  .brand-link {
    font-size: 19px;
  }

  /* 移动导航：显示汉堡按钮，列表默认收起 */
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background-color: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: var(--radius);
    color: var(--color-white);
    font-size: 14px;
    font-weight: 500;
    padding: 8px 12px;
    min-height: 40px;
    cursor: pointer;
  }

  .nav-toggle-label {
    display: inline-block;
    font-size: 14px;
  }

  /* 移动导航：只让列表本身收起/显示，不动父容器 */
  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-ink);
    flex-direction: column;
    align-items: stretch;
    padding: 8px 0 16px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.25);
    z-index: 200;
  }

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

  .nav-list li a {
    padding: 12px 24px;
    font-size: 16px;
    border-radius: 0;
    border-left: 3px solid transparent;
    min-height: 48px;
    display: flex;
    align-items: center;
    color: rgba(255, 255, 255, 0.85);
  }

  .nav-list li a.is-current {
    color: var(--color-white);
    background-color: rgba(242, 163, 60, 0.18);
    border-left-color: var(--color-accent);
  }

  .nav-list li a:hover {
    background-color: rgba(255, 255, 255, 0.06);
    color: var(--color-white);
  }

  /* 为保证汉堡按钮可点击，site-nav 保持可见 */
  .site-nav {
    display: block;
    position: static;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 28px;
    padding: 40px 16px 28px;
  }

  .footer-bottom {
    padding: 14px 16px;
  }

  .copyright {
    font-size: 12px;
  }

  /* 面包屑 */
  .breadcrumb {
    padding: 14px 16px 0;
    font-size: 12px;
  }

  .page-header {
    padding: 24px 16px 20px;
  }

  .page-description {
    font-size: 12px;
  }

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

  .page-lead,
  .page-intro {
    font-size: 15px;
    line-height: 1.7;
  }

  /* 首页 Hero */
  .hero-banner {
    min-height: 0;
  }

  .hero-content {
    padding: 64px 16px 56px;
  }

  .hero-title {
    font-size: 30px;
    line-height: 1.25;
  }

  .hero-lead {
    font-size: 15px;
    line-height: 1.7;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }

  .hero-actions .btn-primary,
  .hero-actions .btn-secondary {
    width: 100%;
    min-height: 48px;
  }

  /* 入口条 */
  .entry-strip {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 0 16px;
  }

  .entry-item {
    min-height: 140px;
    padding: 18px 14px;
  }

  .entry-name {
    font-size: 16px;
  }

  .entry-desc {
    font-size: 13px;
    line-height: 1.5;
  }

  /* 频道速览 */
  .channel-strip {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .channel-mini-card {
    padding: 18px 14px;
    min-height: 0;
  }

  .channel-name {
    font-size: 16px;
  }

  .channel-tags {
    font-size: 12px;
  }

  .channel-fit {
    font-size: 12px;
  }

  /* 片单卡 */
  .playlist-cards {
    grid-template-columns: 1fr;
  }

  .playlist-card {
    flex-direction: row;
  }

  .playlist-figure {
    width: 40%;
    aspect-ratio: auto;
    min-height: 120px;
  }

  .playlist-figure img {
    height: 100%;
  }

  .playlist-body {
    padding: 14px;
  }

  .playlist-name {
    font-size: 16px;
  }

  /* 编号入口 */
  .decision-zone,
  .channel-preview,
  .featured-playlists,
  .faq-preview {
    padding: 40px 16px 0;
  }

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

  .section-note {
    font-size: 14px;
  }

  .decision-col {
    padding: 20px;
  }

  .boundary-note {
    margin: 32px auto;
    padding: 0 16px;
  }

  .boundary-text {
    padding: 14px 16px;
    font-size: 13px;
  }

  .editor-picks {
    padding: 40px 16px 0;
  }

  .pick-item {
    padding: 18px;
  }

  /* 内页布局 */
  .page-layout,
  .layout-shell {
    padding: 0 16px;
  }

  /* 频道卡 */
  .channel-grid {
    gap: 12px;
  }

  .channel-card {
    flex-direction: row;
  }

  .channel-media {
    width: 40%;
    aspect-ratio: auto;
    min-height: 140px;
  }

  .channel-media img {
    height: 100%;
  }

  .channel-body {
    padding: 14px;
  }

  .channel-name {
    font-size: 17px;
  }

  .channel-desc {
    font-size: 13px;
    line-height: 1.6;
  }

  /* 频道关系与路径 */
  .path-item {
    grid-template-columns: auto 1fr;
    padding: 16px;
  }

  .path-index {
    grid-row: auto;
    grid-column: 1;
  }

  .path-name {
    grid-column: 2;
  }

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

  .path-item a.text-link {
    grid-column: 1 / -1;
  }

  /* 片单页 */
  .playlist-feature,
  .playlist-season,
  .playlist-backstage {
    margin-bottom: 40px;
  }

  .playlist-feature h2,
  .playlist-season h2,
  .playlist-backstage h2 {
    font-size: 20px;
  }

  .season-timeline {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .season-item {
    padding: 12px;
  }

  .backstage-steps {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .usage-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .playlist-content-block {
    padding: 14px 16px;
  }

  /* 指南页 */
  .route-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .route-card {
    padding: 16px;
  }

  .cover-points {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .device-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .device-card {
    padding: 18px;
  }

  /* 自查步骤 */
  .check-item {
    grid-template-columns: 36px 1fr;
    gap: 2px 10px;
    padding: 14px 14px;
  }

  .check-item::before {
    font-size: 13px;
  }

  .check-title {
    font-size: 14px;
  }

  .check-desc {
    font-size: 13px;
    line-height: 1.65;
    min-width: 0;
    overflow-wrap: break-word;
    word-break: normal;
  }

  .next-grid {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .related-links {
    padding: 16px;
    gap: 8px 12px;
  }

  /* FAQ 页 */
  .faq-section > h2 {
    font-size: 20px;
  }

  .faq-item summary {
    font-size: 15px;
    padding: 14px 0;
  }

  .faq-answer {
    font-size: 14px;
  }

  .boundary-strip {
    padding: 0 16px;
  }

  .boundary-strip p {
    padding: 16px;
    font-size: 14px;
  }

  /* 关于页 */
  .principle-item {
    grid-template-columns: 36px 1fr;
    gap: 2px 10px;
    padding: 16px;
  }

  .principle-item::before {
    font-size: 13px;
  }

  .principle-title {
    font-size: 15px;
  }

  .principle-text {
    font-size: 13px;
    line-height: 1.65;
  }

  .boundary-item {
    padding: 14px 16px;
    font-size: 14px;
  }

  .boundary-item strong {
    font-size: 14px;
  }

  .exit-link-list {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .exit-link-list a {
    padding: 14px 16px;
    font-size: 14px;
  }

  /* 404 */
  .error-content {
    padding: 40px 16px;
  }

  .error-code {
    font-size: 48px;
  }

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

  .error-desc {
    font-size: 15px;
  }

  /* 侧栏与摘要（移动端） */
  .sidebar-card,
  .summary-card,
  .aside-card {
    padding: 18px;
  }

  .sidebar-links a,
  .summary-list a {
    padding: 10px 12px;
    font-size: 15px;
  }
}

/* ---------- 400px 以下（小屏手机微调） ---------- */
@media (max-width: 400px) {
  .entry-strip {
    grid-template-columns: 1fr;
  }

  .entry-item {
    min-height: 0;
  }

  .channel-strip {
    grid-template-columns: 1fr;
  }

  .channel-mini-card {
    min-height: 0;
  }

  .season-timeline {
    grid-template-columns: 1fr 1fr;
  }
}

/* ---------- 动效：尊重系统减少动效偏好 ---------- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}