/* ============================================================
   糖心导航站 全站样式表 sqztgg.com
   品牌手册风：米白底、深灰文字、珊瑚橙点缀、宽留白与细线分区
   ============================================================ */

/* ------------------------------------------------
   Base
------------------------------------------------ */
:root {
  --color-bg: #faf8f5;
  --color-text: #2e2a26;
  --color-body-text: #4a443e;
  --color-accent: #c2571b;
  --color-accent-dark: #a84815;
  --color-line: #e9e2d8;
  --color-card: #ffffff;
  --color-muted: #7a7268;
  --color-tag-bg: #f3efe9;

  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei",
    "Noto Sans CJK SC", "Source Han Sans SC", sans-serif;

  --container-width: 1200px;
  --read-width: 800px;
  --radius: 8px;
  --radius-sm: 6px;

  --header-h: 72px;
  --space-section: 64px;
}

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

html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-body-text);
  background-color: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a {
  color: var(--color-accent);
  text-decoration: none;
  transition: color 0.2s ease;
}

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

h1, h2, h3, h4 {
  color: var(--color-text);
  font-weight: 700;
  line-height: 1.35;
}

h1 { font-size: 40px; }
h2 { font-size: 26px; }
h3 { font-size: 19px; }
h4 { font-size: 16px; }

p {
  margin-bottom: 0;
}

ul, ol {
  list-style: none;
}

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

/* 滚动淡入为增强效果，不阻塞初始可见性 */
.reveal {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: no-preference) {
  .reveal {
    transition: opacity 0.4s ease, transform 0.4s ease;
  }
}

/* ------------------------------------------------
   Layout 骨架
------------------------------------------------ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.site-home {
  background-color: var(--color-bg);
}

.site-inner {
  background-color: var(--color-bg);
}

.site-error {
  background-color: var(--color-bg);
}

.site-header {
  background-color: var(--color-card);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
}

.brand-name {
  font-size: 24px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.02em;
}

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

.site-nav {
  display: block;
}

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

.nav-list li a {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--color-body-text);
  border-radius: var(--radius-sm);
  border-bottom: 2px solid transparent;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.nav-list li a:hover {
  color: var(--color-accent);
  background-color: var(--color-tag-bg);
}

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

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 10px;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
}

.nav-toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 72px;
  width: 100%;
}

.site-footer {
  background-color: var(--color-text);
  color: rgba(255, 255, 255, 0.8);
  padding: 56px 24px 24px;
  margin-top: auto;
}

.footer-columns {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer-brand-name {
  font-size: 22px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-col p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.65);
}

.footer-col h2 {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 16px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.65);
  transition: color 0.2s ease;
}

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

.footer-bottom {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.45);
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 28px;
  color: var(--color-muted);
}

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

.breadcrumb a:hover {
  text-decoration: underline;
}

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

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

/* 页面标题区 */
.page-header {
  max-width: var(--read-width);
  margin-bottom: 48px;
}

.page-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.page-description {
  font-size: 17px;
  color: var(--color-body-text);
  line-height: 1.7;
  margin-bottom: 8px;
}

.page-subnote,
.page-note {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 8px;
}

.title-divider {
  width: 56px;
  height: 3px;
  background-color: var(--color-accent);
  border-radius: 2px;
}

/* 双栏布局容器 */
.layout-shell {
  display: grid;
  gap: 48px;
}

.sidebar-right {
  grid-template-columns: minmax(0, 1fr) 260px;
  align-items: start;
}

.sidebar-left {
  grid-template-columns: 240px minmax(0, 1fr);
  align-items: start;
}

.sidebar-left .main-section,
.main-content {
  min-width: 0;
}

/* ------------------------------------------------
   通用组件
------------------------------------------------ */
/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1.4;
  min-height: 44px;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background-color 0.2s ease, border-color 0.2s ease, color 0.2s ease;
}

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

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

.btn-secondary {
  background-color: transparent;
  border-color: var(--color-line);
  color: var(--color-text);
}

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

.btn-text {
  display: inline-flex;
  align-items: center;
  padding: 8px 0;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
  background: none;
  border: none;
  border-bottom: 1px solid transparent;
  min-height: 44px;
  cursor: pointer;
}

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

/* 区块标题 */
.section-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 8px;
}

.section-heading .section-title {
  margin-bottom: 0;
}

.section-title {
  font-size: 26px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: 8px;
}

.section-intro {
  font-size: 15px;
  color: var(--color-muted);
  margin-bottom: 32px;
  max-width: 640px;
}

.section-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  white-space: nowrap;
}

.section-link:hover {
  text-decoration: underline;
}

/* 内容卡片 */
.content-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
  display: flex;
  flex-direction: column;
}

.content-card:hover {
  box-shadow: 0 6px 20px rgba(46, 42, 38, 0.08);
  border-color: #d8d0c4;
}

.content-card img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
}

.card-body {
  padding: 18px 18px 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.card-tag {
  display: inline-block;
  align-self: flex-start;
  font-size: 13px;
  color: var(--color-accent);
  background-color: var(--color-tag-bg);
  border-radius: 4px;
  padding: 2px 10px;
  line-height: 1.6;
}

.card-body h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 4px 0 0;
}

.card-body p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* FAQ 折叠 */
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color 0.2s ease;
}

.faq-item:hover {
  border-color: #d8d0c4;
}

.faq-item summary {
  cursor: pointer;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 44px;
}

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

.faq-item summary::after {
  content: "+";
  font-size: 22px;
  line-height: 1;
  color: var(--color-accent);
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item[open] summary {
  border-bottom: 1px solid var(--color-line);
}

.faq-answer,
.faq-item > p {
  padding: 16px 20px 20px;
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-body-text);
}

.faq-answer a,
.faq-item p a {
  color: var(--color-accent);
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* 图片与说明 */
.content-media {
  margin: 0;
}

.content-media-inline {
  margin: 24px 0;
}

.content-media img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.content-media figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 8px 2px 0;
  line-height: 1.5;
}

/* 标签列表 */
.tag-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag-list li {
  display: inline-block;
  font-size: 14px;
  color: var(--color-body-text);
  background-color: var(--color-tag-bg);
  border: 1px solid var(--color-line);
  border-radius: 4px;
  padding: 4px 14px;
  line-height: 1.6;
}

/* ------------------------------------------------
   首页
------------------------------------------------ */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 72px;
  width: 100%;
}

/* 公告条 */
.announcement-bar {
  background-color: var(--color-text);
  text-align: center;
  padding: 10px 24px;
}

.announcement-bar p {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.85);
}

/* Hero 焦点区 */
.hero {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 56px;
  padding: 64px 0 56px;
}

.hero-content h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}

.hero-lead {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-body-text);
  margin-bottom: 32px;
  max-width: 460px;
}

.hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.hero-media {
  margin: 0;
}

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

.hero-tags {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-top: 16px;
}

.hero-tags span {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: 20px;
  padding: 4px 18px;
}

/* 频道标签带 */
.tag-bar-section {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
}

.tag-bar {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.tag-item {
  display: block;
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 18px 20px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.tag-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(194, 87, 27, 0.08);
}

.tag-name {
  display: block;
  font-size: 17px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 4px;
}

.tag-item:hover .tag-name {
  color: var(--color-accent);
}

.tag-desc {
  display: block;
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.5;
}

/* 精选内容预览 */
.featured-grid-section {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
}

.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

/* 专题大卡 */
.special-callout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 40px;
  margin: 40px 0;
}

.special-content h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.special-content p {
  font-size: 15px;
  line-height: 1.7;
  color: var(--color-body-text);
  margin-bottom: 16px;
}

.special-audience {
  font-size: 14px;
  color: var(--color-muted);
}

.special-audience strong {
  color: var(--color-accent);
  font-weight: 600;
}

.special-content .btn-text {
  margin-top: 12px;
}

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

/* 观看指南四步 */
.guide-steps {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
  margin-top: 8px;
}

.step-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px 20px 24px;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.step-item:hover {
  border-color: var(--color-accent);
  box-shadow: 0 4px 16px rgba(194, 87, 27, 0.06);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
}

.step-item h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
}

.step-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

/* FAQ 预览 */
.faq-preview {
  padding: 48px 0;
  border-top: 1px solid var(--color-line);
}

.faq-preview .faq-list {
  margin-bottom: 24px;
}

.faq-preview > .section-link {
  display: inline-block;
}

/* 边界收尾条 */
.boundary-line {
  padding: 20px 0;
  border-top: 1px solid var(--color-line);
  text-align: center;
}

.boundary-line p {
  font-size: 14px;
  color: var(--color-muted);
}

.boundary-line a {
  color: var(--color-accent);
  font-weight: 600;
}

/* ------------------------------------------------
   精选页 tx/jingxuan.html
------------------------------------------------ */
.tag-filter {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 40px;
}

.filter-tag {
  display: inline-block;
  font-size: 14px;
  color: var(--color-body-text);
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: 20px;
  padding: 6px 18px;
  transition: border-color 0.2s ease, color 0.2s ease;
}

.filter-tag:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.filter-tag:first-child {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

.entry-list {
  display: flex;
  flex-direction: column;
  gap: 36px;
  margin-bottom: 56px;
}

.entry-item {
  display: grid;
  grid-template-columns: 300px minmax(0, 1fr);
  gap: 28px;
  align-items: center;
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.entry-item:hover {
  box-shadow: 0 6px 20px rgba(46, 42, 38, 0.06);
  border-color: #d8d0c4;
}

.entry-media {
  overflow: hidden;
  border-radius: var(--radius-sm);
}

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

.entry-content {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 8px;
  padding: 4px 8px 4px 0;
}

.entry-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--color-accent);
  background-color: var(--color-tag-bg);
  border-radius: 4px;
  padding: 2px 10px;
}

.entry-content h3 {
  font-size: 20px;
  font-weight: 700;
}

.entry-point {
  font-size: 15px;
  color: var(--color-body-text);
  line-height: 1.7;
}

.entry-audience {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 4px;
}

.entry-audience strong {
  color: var(--color-accent);
  font-weight: 600;
}

.entry-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  margin-top: 4px;
}

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

/* 底部双栏入口 */
.special-cta {
  margin-top: 16px;
}

.cta-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  margin-top: 20px;
}

.cta-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 12px;
}

.cta-card h3 {
  font-size: 19px;
}

.cta-card p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.cta-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  margin-top: 8px;
}

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

/* ------------------------------------------------
   分类图谱页 tx/fenlei.html
------------------------------------------------ */
.aside-catalog {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.aside-catalog h2 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.catalog-list {
  display: flex;
  flex-direction: column;
}

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

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

.catalog-list li a {
  display: block;
  padding: 10px 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  transition: color 0.2s ease;
}

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

.catalog-sub {
  display: block;
  font-size: 13px;
  font-weight: 400;
  color: var(--color-muted);
  margin-top: 2px;
}

.aside-note {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--color-line);
}

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

.catalog-overview {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 32px;
}

.catalog-overview h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.catalog-overview p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 12px;
}

/* 分类组 */
.category-group {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.category-head {
  margin-bottom: 16px;
}

.category-head h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 6px;
}

.category-desc {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.tag-tip {
  font-size: 13px;
  color: var(--color-muted);
  margin-top: 12px;
  line-height: 1.6;
}

.tag-tip strong {
  color: var(--color-accent);
  font-weight: 600;
}

/* 关系说明 */
.relation-note {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin: 32px 0 20px;
}

.relation-note h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.relation-note p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 10px;
}

/* 放宽建议 */
.broaden-tip {
  background-color: #f3efe9;
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 20px;
}

.broaden-tip h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.broaden-tip > p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.broaden-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.broaden-list li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.broaden-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.broaden-list li strong {
  color: var(--color-text);
}

/* 交叉链接 */
.cross-links {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  margin-top: 20px;
}

.cross-links h2 {
  font-size: 20px;
  margin-bottom: 12px;
}

.cross-links p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 16px;
}

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

.cross-links ul li a {
  font-size: 15px;
  font-weight: 600;
  color: var(--color-accent);
}

.cross-links ul li a:hover {
  text-decoration: underline;
}

/* ------------------------------------------------
   专题片单页 tx/zhuanti.html
------------------------------------------------ */
.special-grid-section {
  margin-bottom: 56px;
}

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

.special-card {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.special-card:hover {
  box-shadow: 0 6px 20px rgba(46, 42, 38, 0.08);
  border-color: #d8d0c4;
}

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

.special-card-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  flex: 1;
}

.special-card-body h3 {
  font-size: 19px;
  font-weight: 700;
}

.special-scene {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.special-card-body a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  margin-top: auto;
  padding-top: 12px;
  border-bottom: 1px solid transparent;
  align-self: flex-start;
}

.special-card-body a:hover {
  border-bottom-color: var(--color-accent);
}

/* 观看顺序区 */
.watch-order-section {
  margin-bottom: 56px;
}

.watch-order-list {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 24px;
}

.watch-order-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 28px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.watch-order-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 12px;
}

.watch-order-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background-color: var(--color-accent);
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  flex-shrink: 0;
}

.watch-order-head h3 {
  font-size: 19px;
  font-weight: 700;
}

.watch-order-scene {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.watch-order-steps {
  list-style: none;
  counter-reset: step;
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}

.watch-order-steps li {
  counter-increment: step;
  font-size: 15px;
  line-height: 1.6;
  padding-left: 36px;
  position: relative;
}

.watch-order-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 1px;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background-color: var(--color-tag-bg);
  color: var(--color-accent);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
}

.watch-order-tip {
  font-size: 14px;
  color: var(--color-muted);
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  line-height: 1.6;
}

/* 方向入口 */
.direction-section {
  padding-top: 16px;
}

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

.direction-item {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.direction-item h3 {
  font-size: 17px;
  font-weight: 700;
}

.direction-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  flex: 1;
}

.direction-item a {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
  align-self: flex-start;
}

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

/* ------------------------------------------------
   观看指南页 tx/guanzhi.html
------------------------------------------------ */
.guide-step {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px;
  margin-bottom: 24px;
  scroll-margin-top: calc(var(--header-h) + 24px);
}

.step-head {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 20px;
}

.step-head .step-num {
  margin-bottom: 0;
}

.step-head h2 {
  font-size: 22px;
  font-weight: 700;
}

.guide-step > p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 16px;
}

.step-check {
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin-top: 20px;
}

.step-check h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

.step-check ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.step-check ul li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.step-check ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

.step-figure {
  margin: 20px 0;
}

.step-figure img {
  width: 100%;
  height: auto;
  border-radius: var(--radius);
}

.step-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding: 8px 2px 0;
}

.verify-box {
  background-color: #fdf6f0;
  border: 1px solid #e8cbb8;
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  margin: 20px 0;
}

.verify-box h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--color-accent);
  margin-bottom: 12px;
}

.verify-box ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.verify-box ul li {
  font-size: 15px;
  line-height: 1.6;
  padding-left: 20px;
  position: relative;
}

.verify-box ul li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* 附加排查区 */
.guide-extra {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 32px;
}

.guide-extra > h2 {
  font-size: 22px;
  margin-bottom: 12px;
}

.guide-extra > p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.trouble-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-bottom: 20px;
}

.trouble-list li {
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-sm);
  padding: 16px 20px;
}

.trouble-list li h3 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 4px;
}

.trouble-list li p {
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-muted);
}

.guide-extra > p:last-child {
  margin-bottom: 0;
}

.guide-extra a {
  font-weight: 600;
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* 右侧辅助栏 */
.aside-helper {
  min-width: 0;
}

.helper-inner {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.helper-inner h2 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-line);
}

.helper-nav {
  display: flex;
  flex-direction: column;
  margin-bottom: 20px;
}

.helper-nav li a {
  display: block;
  padding: 8px 4px;
  font-size: 14px;
  color: var(--color-body-text);
  border-bottom: 1px solid var(--color-line);
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.helper-nav li:last-child a {
  border-bottom: none;
}

.helper-nav li a:hover {
  color: var(--color-accent);
  padding-left: 8px;
}

.helper-note {
  background-color: var(--color-tag-bg);
  border-radius: var(--radius-sm);
  padding: 16px;
  margin-bottom: 20px;
}

.helper-note h2 {
  font-size: 14px;
  border-bottom: none;
  padding-bottom: 0;
  margin-bottom: 8px;
}

.helper-note p {
  font-size: 13px;
  color: var(--color-muted);
  line-height: 1.6;
}

.helper-links ul {
  display: flex;
  flex-direction: column;
}

.helper-links ul li a {
  display: block;
  padding: 6px 4px;
  font-size: 14px;
  color: var(--color-accent);
}

.helper-links ul li a:hover {
  text-decoration: underline;
}

/* ------------------------------------------------
   常见疑问页 tx/wenti.html
------------------------------------------------ */
.question-nav {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px;
  position: sticky;
  top: calc(var(--header-h) + 24px);
}

.question-nav > h2 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-line);
}

.question-group {
  margin-bottom: 16px;
}

.question-group h3 {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-muted);
  margin-bottom: 6px;
}

.question-group ul {
  display: flex;
  flex-direction: column;
}

.question-group ul li a {
  display: block;
  padding: 6px 4px;
  font-size: 14px;
  color: var(--color-body-text);
  transition: color 0.2s ease;
}

.question-group ul li a:hover {
  color: var(--color-accent);
}

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

.faq-content .section-title {
  margin-bottom: 8px;
}

.faq-group {
  margin-bottom: 32px;
}

.faq-group > h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-line);
}

.faq-group .faq-item {
  margin-bottom: 12px;
}

.faq-next {
  font-size: 14px;
  color: var(--color-muted);
  margin-top: 12px;
}

.faq-next a {
  font-weight: 600;
  color: var(--color-accent);
}

/* 相关问题入口 */
.related-guide {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 24px 28px;
  margin-top: 32px;
}

.related-guide .section-title {
  font-size: 18px;
  margin-bottom: 10px;
}

.related-guide p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.related-guide p a {
  font-weight: 600;
  color: var(--color-accent);
}

/* ------------------------------------------------
   收录说明页 tx/bianjie.html
------------------------------------------------ */
.statement-figure {
  max-width: var(--read-width);
  margin: 0 0 40px;
}

.statement-figure img {
  width: 100%;
  border-radius: var(--radius);
}

.statement-figure figcaption {
  font-size: 13px;
  color: var(--color-muted);
  padding-top: 8px;
}

.statement-list,
.service-limits,
.feedback-note {
  max-width: var(--read-width);
  margin-bottom: 48px;
}

.statement-list h2,
.service-limits h2,
.feedback-note h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.statement-list > p,
.service-limits > p,
.feedback-note > p {
  font-size: 15px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.statement-list h3 {
  font-size: 18px;
  margin: 28px 0 16px;
}

.principle-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-bottom: 28px;
}

.principle-list li {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-radius: var(--radius);
  padding: 20px 24px;
}

.principle-list li h4 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 6px;
}

.principle-list li h4::before {
  content: attr(data-num);
  display: inline-block;
  margin-right: 8px;
  color: var(--color-accent);
  font-weight: 700;
}

.principle-list li p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.7;
}

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

.scope-list li {
  font-size: 15px;
  line-height: 1.7;
  padding-left: 22px;
  position: relative;
}

.scope-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 6px;
  height: 6px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

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

.limit-list li {
  background-color: var(--color-card);
  border: 1px solid var(--color-line);
  border-left: 3px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 18px 22px;
}

.limit-list li h3 {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
}

.limit-list li p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
}

.feedback-options {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 20px;
  margin: 24px 0;
}

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

.feedback-item h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}

.feedback-item p {
  font-size: 14px;
  color: var(--color-muted);
  line-height: 1.6;
  margin-bottom: 12px;
}

.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--color-accent);
  border-bottom: 1px solid transparent;
}

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

.feedback-note-end {
  font-size: 13px;
  color: var(--color-muted);
  border-top: 1px solid var(--color-line);
  padding-top: 16px;
}

/* ------------------------------------------------
   404 页
------------------------------------------------ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}

.error-panel {
  text-align: center;
  max-width: 520px;
}

.error-code {
  font-size: 72px;
  font-weight: 700;
  color: var(--color-line);
  line-height: 1;
  margin-bottom: 16px;
}

.error-panel h1 {
  font-size: 28px;
  margin-bottom: 16px;
}

.error-desc {
  font-size: 16px;
  color: var(--color-muted);
  margin-bottom: 32px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.error-tip {
  font-size: 14px;
  color: var(--color-muted);
}

.error-tip a {
  color: var(--color-accent);
  font-weight: 600;
}

/* ------------------------------------------------
   响应式
------------------------------------------------ */
@media (max-width: 1024px) {
  .tag-bar {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .hero {
    gap: 32px;
    padding: 48px 0;
  }

  .hero-content h1 {
    font-size: 36px;
  }

  .special-callout {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px;
  }

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

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

  .entry-item {
    grid-template-columns: 240px minmax(0, 1fr);
  }

  .sidebar-right {
    grid-template-columns: minmax(0, 1fr) 220px;
    gap: 32px;
  }

  .sidebar-left {
    grid-template-columns: 200px minmax(0, 1fr);
    gap: 32px;
  }
}

@media (max-width: 900px) {
  .layout-shell.sidebar-right {
    grid-template-columns: 1fr;
  }

  .layout-shell.sidebar-left {
    grid-template-columns: 1fr;
  }

  .aside-helper,
  .aside-catalog,
  .question-nav {
    position: static;
    order: 2;
    margin-top: 24px;
  }

  .sidebar-right .main-content {
    order: 1;
  }

  .sidebar-left .main-section {
    order: 1;
  }

  .sidebar-left .aside-catalog {
    order: 2;
  }

  /* 观看指南：正文在前，辅助在后 */
  .page-guanzhi .aside-helper {
    display: none;
  }

  /* 分类图谱：主内容在前，侧栏在后 */
  .page-fenlei .aside-catalog {
    max-width: 100%;
  }

  .page-fenlei .main-section {
    width: 100%;
  }

  .footer-columns {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 32px;
  }

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

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

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

@media (max-width: 768px) {
  :root {
    --header-h: 60px;
    --space-section: 40px;
  }

  h1 { font-size: 30px; }
  h2 { font-size: 22px; }

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

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    background-color: var(--color-card);
    border-bottom: 1px solid var(--color-line);
    box-shadow: 0 8px 16px rgba(46, 42, 38, 0.08);
  }

  .nav-list {
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    gap: 0;
    max-height: calc(100vh - var(--header-h));
    overflow-y: auto;
  }

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

  .nav-list li a {
    display: block;
    padding: 12px 8px;
    font-size: 16px;
    border-bottom: 1px solid var(--color-line);
    border-radius: 0;
    min-height: 44px;
    line-height: 1.4;
  }

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

  .nav-list li a.is-current {
    border-bottom: 1px solid var(--color-line);
    border-bottom-color: var(--color-line);
    background-color: var(--color-tag-bg);
  }

  .inner-main {
    padding: 24px 16px 56px;
  }

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

  .page-header {
    margin-bottom: 32px;
  }

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

  .hero {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 0;
  }

  .hero-content h1 {
    font-size: 32px;
  }

  .hero-lead {
    font-size: 16px;
  }

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

  .hero-tags {
    flex-wrap: wrap;
  }

  .tag-bar {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
  }

  .featured-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .steps-grid {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .special-callout {
    padding: 24px;
    margin: 24px 0;
  }

  .entry-item {
    grid-template-columns: 1fr;
    padding: 16px;
  }

  .entry-media img {
    aspect-ratio: 16 / 10;
  }

  .entry-content {
    padding: 4px 0;
  }

  .faq-item summary {
    padding: 16px;
    font-size: 15px;
  }

  .faq-answer,
  .faq-item > p {
    padding: 14px 16px 18px;
    font-size: 14px;
  }

  .footer-columns {
    grid-template-columns: 1fr;
    gap: 32px;
  }

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

  .footer-col:last-child {
    border-bottom: none;
    padding-bottom: 0;
  }

  .announcement-bar p {
    font-size: 13px;
  }

  .guide-step {
    padding: 24px 20px;
  }

  .step-head h2 {
    font-size: 19px;
  }

  .step-check,
  .verify-box {
    padding: 16px;
  }

  .category-group,
  .catalog-overview,
  .relation-note,
  .broaden-tip,
  .cross-links {
    padding: 20px;
  }

  .watch-order-item {
    padding: 20px;
  }

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

  .feedback-options {
    grid-template-columns: 1fr;
  }

  .error-panel {
    padding: 0 16px;
  }

  .error-code {
    font-size: 56px;
  }

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

  .error-actions .btn {
    width: 100%;
    max-width: 280px;
  }

  /* 常见疑问：FAQ 内容在前，目录在后 */
  .page-wenti .faq-content {
    order: 1;
  }

  .page-wenti .question-nav {
    order: 2;
  }

  /* 分类图谱：主内容在前，侧栏在后 */
  .page-fenlei .main-section {
    order: 1;
  }

  .page-fenlei .aside-catalog {
    order: 2;
  }
}

@media (max-width: 480px) {
  .tag-bar {
    grid-template-columns: 1fr;
  }

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

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

  .hero-tags {
    justify-content: flex-start;
  }

  .special-card-body {
    padding: 16px;
  }

  .watch-order-head {
    align-items: flex-start;
  }

  .watch-order-steps li {
    font-size: 14px;
  }

  .breadcrumb {
    font-size: 13px;
    margin-bottom: 20px;
  }

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

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

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

  .section-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .section-link {
    font-size: 13px;
  }
}

/* 打印 */
@media print {
  .site-header,
  .site-footer,
  .announcement-bar,
  .aside-helper,
  .aside-catalog,
  .question-nav,
  .nav-toggle {
    display: none;
  }

  .site-main {
    padding: 0;
  }

  body {
    background-color: #ffffff;
  }
}