/* ============================================================
   糖心视频 · 整站样式表
   站点：hnfczx.net
   说明：本文件覆盖全站所有页面的样式，按 base / layout /
   components / pages / responsive 分组组织。
   ============================================================ */

/* ============================================================
   Base —— 全局基础
   ============================================================ */

*,
*::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: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: #2B2B2B;
  background-color: #FAFAFA;
}

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

a {
  color: #2274A5;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #F05A28;
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  font-weight: 600;
  line-height: 1.3;
  color: #2B2B2B;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 18px;
}

p {
  margin-bottom: 12px;
}

/* 通用容器 */
.site-main,
.footer-inner,
.header-inner,
.nav-inner,
.section-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

/* ============================================================
   Layout —— 全站骨架布局
   ============================================================ */

/* ---------- 页头 ---------- */

.site-header {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E5E5;
}

.header-top {
  background-color: #FFFFFF;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  padding-bottom: 16px;
}

.brand-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.brand-name {
  font-size: 22px;
  font-weight: 600;
  color: #F05A28;
  letter-spacing: 0.02em;
}

.brand-slogan {
  font-size: 14px;
  color: #888888;
  margin: 0;
}

.header-nav {
  background-color: #2B2B2B;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
}

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

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #FFFFFF;
  border-radius: 2px;
}

.site-nav {
  flex: 1;
}

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

.nav-list li a {
  display: block;
  padding: 12px 18px;
  font-size: 15px;
  color: #E5E5E5;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.nav-list li a:hover {
  background-color: rgba(255, 255, 255, 0.1);
  color: #FFFFFF;
}

.nav-list li a.is-current {
  background-color: #F05A28;
  color: #FFFFFF;
}

/* ---------- 主体 ---------- */

.site-main {
  padding-top: 32px;
  padding-bottom: 48px;
  min-height: 60vh;
}

/* 内页统一骨架 */
.inner-main {
  padding-top: 32px;
  padding-bottom: 56px;
}

/* 面包屑 */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 14px;
  margin-bottom: 24px;
  color: #888888;
}

.breadcrumb a {
  color: #2274A5;
}

.breadcrumb a:hover {
  color: #F05A28;
}

.breadcrumb-sep {
  color: #BBBBBB;
}

.breadcrumb-current {
  color: #666666;
}

/* 页面标题区 */
.page-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid #E5E5E5;
}

.page-title {
  font-size: 32px;
  color: #2B2B2B;
  margin-bottom: 12px;
}

.page-description {
  font-size: 16px;
  color: #666666;
  max-width: 720px;
  margin: 0;
}

/* 内页内容媒体 */
.content-media {
  margin-bottom: 16px;
}

.content-media-inline {
  max-width: 640px;
}

.content-media img {
  width: 100%;
  height: auto;
  border-radius: 8px;
}

.content-media figcaption {
  font-size: 13px;
  color: #888888;
  margin-top: 8px;
}

/* ---------- 页脚 ---------- */

.site-footer {
  background-color: #2B2B2B;
  color: #CCCCCC;
  font-size: 14px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 40px;
  padding-top: 48px;
  padding-bottom: 40px;
}

.footer-brand-name {
  font-size: 20px;
  font-weight: 600;
  color: #FFFFFF;
  margin-bottom: 8px;
}

.footer-brand-desc {
  color: #AAAAAA;
  font-size: 14px;
  line-height: 1.6;
  margin: 0;
}

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

.footer-links li {
  margin-bottom: 8px;
}

.footer-links a {
  color: #BBBBBB;
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #F05A28;
}

.footer-boundary-text {
  color: #AAAAAA;
  font-size: 14px;
  line-height: 1.7;
  margin: 0;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding-top: 16px;
  padding-bottom: 16px;
  text-align: center;
}

.copyright {
  font-size: 13px;
  color: #888888;
  margin: 0;
}

/* ============================================================
   Components —— 通用组件
   ============================================================ */

/* ---------- 按钮 ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
}

.btn-primary {
  background-color: #F05A28;
  color: #FFFFFF;
  border: 1px solid #F05A28;
}

.btn-primary:hover {
  background-color: #D94A1A;
  border-color: #D94A1A;
  color: #FFFFFF;
}

.btn-secondary {
  background-color: #FFFFFF;
  color: #2B2B2B;
  border: 1px solid #E5E5E5;
}

.btn-secondary:hover {
  border-color: #F05A28;
  color: #F05A28;
  background-color: #FFFFFF;
}

/* ---------- 区块标题 ---------- */

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

.section-title {
  font-size: 24px;
  color: #2B2B2B;
  margin-bottom: 8px;
}

.section-desc {
  font-size: 15px;
  color: #666666;
  max-width: 640px;
  margin: 0;
}

.section-foot {
  margin-top: 24px;
  text-align: center;
}

.section-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 15px;
  font-weight: 500;
  color: #F05A28;
  padding: 8px 16px;
  min-height: 44px;
  transition: color 0.2s ease;
}

.section-link:hover {
  color: #D94A1A;
}

/* ---------- 卡片 ---------- */

.card-figure,
.channel-figure,
.topic-figure {
  overflow: hidden;
  border-radius: 8px 8px 0 0;
  background-color: #F0F0F0;
  aspect-ratio: 16 / 9;
}

.card-figure img,
.channel-figure img,
.topic-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.card-body {
  padding: 16px;
}

.card-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.card-text {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin-bottom: 12px;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: #2274A5;
  min-height: 44px;
  padding: 4px 0;
}

.card-link:hover {
  color: #F05A28;
}

/* ---------- 步骤条 ---------- */

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

.step-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.step-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
  transform: translateY(-2px);
}

.step-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: #F05A28;
  color: #FFFFFF;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 12px;
}

.step-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.step-text {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin: 0;
}

/* ---------- FAQ 折叠 ---------- */

.faq-panel {
  max-width: 800px;
}

.faq-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 20px;
  font-size: 16px;
  font-weight: 500;
  color: #2B2B2B;
  cursor: pointer;
  list-style: none;
  position: relative;
  min-height: 44px;
}

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

.faq-question::after {
  content: "+";
  font-size: 20px;
  font-weight: 400;
  color: #F05A28;
  flex-shrink: 0;
  transition: transform 0.2s ease;
}

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

.faq-answer {
  padding: 0 20px 16px;
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

.faq-answer p {
  margin-bottom: 8px;
}

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

.faq-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: #2274A5;
  min-height: 44px;
  padding: 4px 0;
}

.faq-link:hover {
  color: #F05A28;
}

/* ============================================================
   Pages —— 首页
   ============================================================ */

/* ---------- Hero 焦点区 ---------- */

.hero {
  background-color: #FFFFFF;
  border-bottom: 1px solid #E5E5E5;
  padding: 48px 0 40px;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 48px;
  align-items: center;
}

.hero-title {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.hero-subtitle {
  font-size: 16px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 520px;
}

.hero-cta {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-figure {
  border-radius: 8px;
  overflow: hidden;
  background-color: #F0F0F0;
  aspect-ratio: 16 / 10;
}

.hero-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-tags {
  grid-column: 1 / -1;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid #F0F0F0;
}

.tag-label {
  font-size: 14px;
  font-weight: 500;
  color: #2B2B2B;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 16px;
  font-size: 14px;
  color: #2B2B2B;
  background-color: #F5F5F5;
  border: 1px solid #E5E5E5;
  border-radius: 4px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
}

.hero-tag:hover {
  background-color: #F05A28;
  border-color: #F05A28;
  color: #FFFFFF;
}

/* ---------- 最新动态条 ---------- */

.latest-updates {
  background-color: #FAFAFA;
  padding: 32px 0;
}

.update-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.update-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 16px 20px;
}

.update-label {
  display: inline-block;
  flex-shrink: 0;
  font-size: 13px;
  font-weight: 500;
  color: #F05A28;
  background-color: rgba(240, 90, 40, 0.08);
  border-radius: 4px;
  padding: 2px 10px;
  margin-top: 2px;
}

.update-text {
  font-size: 14px;
  color: #2B2B2B;
  line-height: 1.6;
  margin: 0;
  flex: 1;
}

.update-link {
  font-size: 14px;
  color: #2274A5;
  flex-shrink: 0;
  white-space: nowrap;
  align-self: center;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
  padding: 0 4px;
}

.update-link:hover {
  color: #F05A28;
}

/* ---------- 频道分类预览 ---------- */

.channel-preview {
  background-color: #FFFFFF;
  padding: 48px 0;
}

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

.channel-card {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.channel-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

/* ---------- 专题推荐预览 ---------- */

.topics-preview {
  background-color: #FAFAFA;
  padding: 48px 0;
}

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

.topic-card {
  display: flex;
  flex-direction: column;
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  overflow: hidden;
  transition: box-shadow 0.2s ease, transform 0.2s ease;
}

.topic-card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.topic-body {
  padding: 20px;
}

.topic-title {
  font-size: 18px;
  margin-bottom: 8px;
}

.topic-text {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin-bottom: 12px;
}

.topic-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: #2274A5;
  min-height: 44px;
  padding: 4px 0;
}

.topic-link:hover {
  color: #F05A28;
}

/* ---------- 观看指南入口 ---------- */

.guide-summary {
  background-color: #FFFFFF;
  padding: 48px 0;
}

/* ---------- 问题排查入口 ---------- */

.faq-quick {
  background-color: #FAFAFA;
  padding: 48px 0;
}

/* ---------- 内容边界简介 ---------- */

.boundary {
  background-color: #FFFFFF;
  padding: 40px 0;
  border-top: 1px solid #F0F0F0;
}

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

.boundary-text {
  font-size: 15px;
  color: #666666;
  line-height: 1.7;
  max-width: 720px;
  margin-bottom: 16px;
}

.boundary-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 15px;
  font-weight: 500;
  color: #F05A28;
  min-height: 44px;
  padding: 4px 0;
}

.boundary-link:hover {
  color: #D94A1A;
}

/* ============================================================
   Pages —— 频道分类页
   ============================================================ */

.channel-list {
  margin-bottom: 48px;
}

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

.channel-content {
  padding: 20px;
}

.channel-content h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.channel-content p {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin-bottom: 12px;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 16px;
}

.channel-tags li {
  font-size: 13px;
  color: #2274A5;
  background-color: rgba(34, 116, 165, 0.08);
  border-radius: 4px;
  padding: 2px 10px;
}

.channel-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  color: #2274A5;
  min-height: 44px;
  padding: 4px 0;
}

.channel-link:hover {
  color: #F05A28;
}

/* 浏览建议 */
.browse-tips {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 32px;
}

.browse-tips h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.tips-list {
  margin-bottom: 16px;
}

.tips-list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: #666666;
  line-height: 1.7;
  padding: 8px 0;
  border-bottom: 1px solid #F5F5F5;
}

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

.tips-list strong {
  color: #2B2B2B;
  font-weight: 600;
  flex-shrink: 0;
}

.tips-more {
  display: flex;
  gap: 24px;
  margin: 0;
}

.tips-more a {
  font-size: 14px;
  color: #2274A5;
}

.tips-more a:hover {
  color: #F05A28;
}

/* ============================================================
   Pages —— 专题推荐页
   ============================================================ */

.topic-list {
  margin-bottom: 48px;
}

.topic-list .topic-card {
  display: grid;
  grid-template-columns: 320px 1fr;
  gap: 0;
  margin-bottom: 24px;
}

.topic-media {
  background-color: #F0F0F0;
  overflow: hidden;
  border-radius: 8px 0 0 8px;
  aspect-ratio: 4 / 3;
}

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

.topic-content {
  padding: 24px;
}

.topic-content h3 {
  font-size: 20px;
  margin-bottom: 8px;
}

.topic-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 12px;
}

.topic-standard {
  font-size: 14px;
  color: #666666;
  margin-bottom: 8px;
}

.topic-standard strong {
  color: #2B2B2B;
  font-weight: 600;
}

.topic-preview {
  font-size: 14px;
  color: #666666;
  margin-bottom: 12px;
}

.topic-preview strong {
  color: #2B2B2B;
  font-weight: 600;
}

/* 片单形成方式说明 */
.collection-note {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 32px;
}

.note-intro {
  font-size: 15px;
  color: #666666;
  margin-bottom: 24px;
}

.note-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-bottom: 24px;
}

.note-list li {
  background-color: #FAFAFA;
  border-radius: 8px;
  padding: 20px;
}

.note-list h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: #F05A28;
}

.note-list p {
  font-size: 14px;
  color: #666666;
  line-height: 1.6;
  margin: 0;
}

.note-footer {
  display: flex;
  gap: 24px;
  margin: 0;
}

.note-footer a {
  font-size: 14px;
  color: #2274A5;
}

.note-footer a:hover {
  color: #F05A28;
}

/* ============================================================
   Pages —— 观看指南页
   ============================================================ */

/* 路径总览 */
.path-overview {
  margin-bottom: 48px;
}

.path-overview h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.path-overview p {
  font-size: 15px;
  color: #666666;
  max-width: 720px;
}

.path-figure {
  margin-top: 20px;
  border-radius: 8px;
  overflow: hidden;
  background-color: #F0F0F0;
  aspect-ratio: 16 / 7;
}

.path-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.path-figure figcaption {
  font-size: 13px;
  color: #888888;
  padding: 8px 16px;
  background-color: #FFFFFF;
}

/* 操作步骤 */
.steps-section {
  margin-bottom: 48px;
}

.steps-section > h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.steps-section > p {
  font-size: 15px;
  color: #666666;
  margin-bottom: 24px;
}

.steps-list {
  display: grid;
  gap: 16px;
}

.steps-list .step-item {
  display: flex;
  gap: 20px;
  padding: 24px;
}

.steps-list .step-number {
  flex-shrink: 0;
  margin: 0;
}

.step-content h3 {
  font-size: 18px;
  margin-bottom: 8px;
}

.step-content p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 8px;
}

.step-content p:last-child {
  margin-bottom: 0;
}

/* 决策分支 */
.decision-tree {
  margin-bottom: 48px;
}

.decision-tree h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.decision-tree > p {
  font-size: 15px;
  color: #666666;
  margin-bottom: 24px;
}

.decision-tree > p a {
  color: #2274A5;
}

.decision-group {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 20px 24px;
  margin-bottom: 16px;
}

.decision-group h3 {
  font-size: 16px;
  color: #F05A28;
  margin-bottom: 8px;
}

.decision-group p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 8px;
}

.decision-group p:last-child {
  margin-bottom: 0;
}

.decision-group p strong {
  color: #2B2B2B;
  font-weight: 600;
}

/* 标记说明 */
.marker-explanation {
  margin-bottom: 48px;
}

.marker-explanation h2 {
  font-size: 20px;
  margin-bottom: 8px;
}

.marker-explanation > p {
  font-size: 15px;
  color: #666666;
  margin-bottom: 24px;
}

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

.marker-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease;
}

.marker-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.marker-item h3 {
  font-size: 16px;
  margin-bottom: 8px;
  color: #2274A5;
}

.marker-item p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 8px;
}

.marker-item p:last-child {
  margin-bottom: 0;
}

.marker-item a {
  font-size: 14px;
  color: #2274A5;
}

/* 反馈入口 */
.feedback-entry {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 32px;
}

.feedback-entry h2 {
  font-size: 20px;
  margin-bottom: 16px;
}

.feedback-entry p {
  font-size: 15px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 12px;
}

.feedback-entry p:last-child {
  margin-bottom: 0;
}

.feedback-entry a {
  color: #2274A5;
}

.feedback-entry a:hover {
  color: #F05A28;
}

/* ============================================================
   Pages —— 问题排查页
   ============================================================ */

/* 问题现象选择 */
.problem-selector {
  margin-bottom: 48px;
}

.problem-btn-list {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.problem-btn {
  display: inline-flex;
  align-items: center;
  padding: 10px 20px;
  font-size: 15px;
  color: #2B2B2B;
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 6px;
  transition: background-color 0.2s ease, color 0.2s ease, border-color 0.2s ease;
  min-height: 44px;
}

.problem-btn:hover {
  background-color: #F05A28;
  border-color: #F05A28;
  color: #FFFFFF;
}

/* FAQ 分组 */
.faq-groups {
  margin-bottom: 48px;
}

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

.faq-group-title {
  font-size: 18px;
  color: #2B2B2B;
  padding-bottom: 8px;
  border-bottom: 2px solid #F05A28;
  margin-bottom: 16px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

/* 排查示意图 */
.faq-illustration {
  margin-bottom: 48px;
}

.faq-figure-wrap {
  margin-bottom: 16px;
}

.faq-figure {
  border-radius: 8px;
  overflow: hidden;
  background-color: #F0F0F0;
  aspect-ratio: 16 / 8;
}

.faq-figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.faq-figure figcaption {
  font-size: 13px;
  color: #888888;
  padding: 8px 16px;
  background-color: #FFFFFF;
}

.illustration-note {
  font-size: 14px;
  color: #666666;
}

.illustration-note a {
  color: #2274A5;
}

/* 反馈说明 */
.contact-note {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 32px;
}

.contact-note-text {
  font-size: 15px;
  color: #666666;
  line-height: 1.7;
  margin: 0;
}

.contact-note-text a {
  color: #2274A5;
}

.contact-note-text a:hover {
  color: #F05A28;
}

/* ============================================================
   Pages —— 整理进度页
   ============================================================ */

/* 时间线 */
.timeline-section {
  margin-bottom: 48px;
}

.section-intro {
  font-size: 15px;
  color: #666666;
  margin-bottom: 32px;
}

.timeline {
  position: relative;
  padding-left: 32px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 8px;
  top: 0;
  bottom: 0;
  width: 2px;
  background-color: #E5E5E5;
}

.timeline-item {
  position: relative;
  margin-bottom: 32px;
}

.timeline-marker {
  position: absolute;
  left: -32px;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background-color: #F05A28;
  border: 3px solid #FFFFFF;
  box-shadow: 0 0 0 2px #F05A28;
}

.timeline-content {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 20px 24px;
}

.timeline-title {
  font-size: 17px;
  margin-bottom: 8px;
}

.timeline-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 8px;
}

.timeline-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  color: #2274A5;
  min-height: 44px;
  padding: 4px 0;
}

.timeline-link:hover {
  color: #F05A28;
}

/* 当前重点 */
.current-status {
  margin-bottom: 48px;
}

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

.status-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 24px;
}

.status-title {
  font-size: 16px;
  color: #F05A28;
  margin-bottom: 8px;
}

.status-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin: 0;
}

/* 后续计划 */
.next-plan {
  margin-bottom: 48px;
}

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

.plan-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 24px;
}

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

.plan-desc {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin: 0;
}

/* 边界提示 */
.boundary-note {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 24px 32px;
}

.boundary-text {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin: 0;
}

.boundary-text a {
  color: #2274A5;
}

.boundary-text a:hover {
  color: #F05A28;
}

/* ============================================================
   Pages —— 内容说明页
   ============================================================ */

/* 定位说明 */
.positioning-block {
  margin-bottom: 48px;
}

.section-heading {
  margin-bottom: 16px;
}

.section-heading h2 {
  font-size: 20px;
}

.positioning-text {
  font-size: 15px;
  color: #666666;
  line-height: 1.8;
  max-width: 720px;
}

/* 内容范围 */
.content-scope-block {
  margin-bottom: 48px;
}

.scope-intro {
  font-size: 15px;
  color: #666666;
  margin-bottom: 24px;
}

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

.scope-item {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 24px;
  transition: box-shadow 0.2s ease;
}

.scope-item:hover {
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.06);
}

.scope-item h3 {
  font-size: 16px;
  color: #F05A28;
  margin-bottom: 8px;
}

.scope-item p {
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
  margin: 0;
}

/* 内容边界 */
.content-boundary-block {
  margin-bottom: 48px;
}

.boundary-intro {
  font-size: 15px;
  color: #666666;
  margin-bottom: 24px;
}

.boundary-list {
  display: grid;
  gap: 12px;
  margin-bottom: 16px;
}

.boundary-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 16px 20px;
  font-size: 14px;
  color: #666666;
  line-height: 1.7;
}

.boundary-item::before {
  content: "·";
  font-size: 20px;
  font-weight: 600;
  color: #F05A28;
  line-height: 1;
  flex-shrink: 0;
}

.boundary-note {
  font-size: 14px;
  color: #888888;
  margin: 0;
}

/* 反馈方式 */
.feedback-way-block {
  background-color: #FFFFFF;
  border: 1px solid #E5E5E5;
  border-radius: 8px;
  padding: 32px;
}

.feedback-text {
  font-size: 15px;
  color: #666666;
  line-height: 1.7;
  margin-bottom: 12px;
}

.feedback-text:last-child {
  margin-bottom: 0;
}

.feedback-text a {
  color: #2274A5;
}

.feedback-text a:hover {
  color: #F05A28;
}

/* ============================================================
   Pages —— 404 页面
   ============================================================ */

.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

.error-section {
  text-align: center;
  max-width: 560px;
  width: 100%;
}

.error-code {
  font-size: 64px;
  font-weight: 600;
  color: #F05A28;
  line-height: 1;
  margin-bottom: 16px;
}

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

.error-desc {
  font-size: 16px;
  color: #666666;
  margin-bottom: 24px;
}

.error-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.btn-home,
.btn-guide {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 500;
  border-radius: 6px;
  min-height: 44px;
  transition: background-color 0.2s ease, color 0.2s ease;
}

.btn-home {
  background-color: #F05A28;
  color: #FFFFFF;
}

.btn-home:hover {
  background-color: #D94A1A;
  color: #FFFFFF;
}

.btn-guide {
  background-color: #FFFFFF;
  color: #2B2B2B;
  border: 1px solid #E5E5E5;
}

.btn-guide:hover {
  border-color: #F05A28;
  color: #F05A28;
}

.error-help {
  font-size: 15px;
  color: #666666;
  margin-bottom: 16px;
}

.error-links {
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
}

.error-links a {
  font-size: 14px;
  color: #2274A5;
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.error-links a:hover {
  color: #F05A28;
}

/* ============================================================
   Responsive —— 响应式
   ============================================================ */

/* ---------- 平板及以下 ---------- */

@media (max-width: 992px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-tags {
    grid-column: 1;
  }

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

  .topic-list .topic-card {
    grid-template-columns: 240px 1fr;
  }

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

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

/* ---------- 手机端 ---------- */

@media (max-width: 768px) {
  .site-main,
  .footer-inner,
  .header-inner,
  .nav-inner,
  .section-inner {
    padding-left: 16px;
    padding-right: 16px;
  }

  /* 页头 */
  .header-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding-top: 12px;
    padding-bottom: 12px;
  }

  .brand-slogan {
    font-size: 13px;
  }

  .nav-inner {
    flex-wrap: wrap;
    position: relative;
  }

  .nav-toggle {
    display: flex;
    margin-left: auto;
  }

  .site-nav {
    width: 100%;
    flex-basis: 100%;
  }

  .nav-list {
    display: none;
    flex-direction: column;
    width: 100%;
    padding: 8px 0;
  }

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

  .nav-list li {
    width: 100%;
  }

  .nav-list li a {
    padding: 14px 16px;
    border-radius: 4px;
  }

  /* 页脚 */
  .footer-inner {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 40px;
  }

  /* 首页模块 */
  .hero {
    padding: 32px 0 28px;
  }

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

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

  .hero-cta {
    flex-direction: column;
    gap: 12px;
  }

  .btn {
    width: 100%;
  }

  .hero-tags {
    gap: 8px;
  }

  .hero-tag {
    padding: 6px 12px;
    font-size: 13px;
  }

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

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

  .topic-row {
    grid-template-columns: 1fr;
  }

  .steps-row {
    grid-template-columns: 1fr;
  }

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

  /* 内页 */
  .inner-main {
    padding-top: 24px;
  }

  .page-header {
    margin-bottom: 24px;
  }

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

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

  /* 频道分类页 */
  .channel-list .channel-grid {
    grid-template-columns: 1fr;
  }

  .browse-tips {
    padding: 24px;
  }

  .tips-list li {
    flex-direction: column;
    gap: 4px;
  }

  .tips-more {
    flex-direction: column;
    gap: 8px;
  }

  /* 专题推荐页 */
  .topic-list .topic-card {
    grid-template-columns: 1fr;
  }

  .topic-media {
    border-radius: 8px 8px 0 0;
    aspect-ratio: 16 / 9;
  }

  .topic-content {
    padding: 20px;
  }

  .collection-note {
    padding: 24px;
  }

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

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

  /* 观看指南页 */
  .path-figure {
    aspect-ratio: 16 / 10;
  }

  .steps-list .step-item {
    flex-direction: column;
    gap: 12px;
  }

  .steps-list .step-number {
    margin-bottom: 4px;
  }

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

  .feedback-entry {
    padding: 24px;
  }

  /* 问题排查页 */
  .problem-btn-list {
    flex-direction: column;
    gap: 8px;
  }

  .problem-btn {
    width: 100%;
    justify-content: center;
  }

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

  .contact-note {
    padding: 24px;
  }

  /* 整理进度页 */
  .status-list {
    grid-template-columns: 1fr;
  }

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

  .timeline {
    padding-left: 28px;
  }

  .timeline-marker {
    left: -28px;
  }

  .boundary-note {
    padding: 20px;
  }

  /* 内容说明页 */
  .scope-list {
    grid-template-columns: 1fr;
  }

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

  .feedback-way-block {
    padding: 24px;
  }

  /* 404 */
  .error-code {
    font-size: 48px;
  }

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

  .error-actions {
    flex-direction: column;
    gap: 12px;
  }

  .btn-home,
  .btn-guide {
    width: 100%;
  }

  .error-links {
    flex-direction: column;
    gap: 8px;
  }
}

/* ---------- 小屏手机 ---------- */

@media (max-width: 480px) {
  .brand-name {
    font-size: 20px;
  }

  .brand-slogan {
    font-size: 12px;
  }

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

  .tag-label {
    font-size: 13px;
  }

  .hero-tag {
    font-size: 13px;
  }

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

  .step-item {
    padding: 20px;
  }

  .timeline-content {
    padding: 16px 20px;
  }
}

/* ---------- 动效增强 ---------- */

@media (prefers-reduced-motion: no-preference) {
  .channel-card,
  .topic-card,
  .step-item,
  .marker-item,
  .scope-item {
    transition: box-shadow 0.2s ease, transform 0.2s ease;
  }

  .channel-card:hover,
  .topic-card:hover,
  .step-item:hover,
  .marker-item:hover,
  .scope-item:hover {
    transform: translateY(-2px);
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}