/* ==========================================================================
   58吃瓜 全站样式
   视觉方向：高密度控制台风，以表格和状态为核心，颜色仅用于标识意义
   基础色彩：#1a2a3a（深蓝） #f5f7fa（浅灰） #ffffff（白） #e67e22（橙） #2ecc71（绿）
   内容宽度：1200px   移动端断点：768px
   ========================================================================== */

/* --------------------------------------------------------------------------
   Base —— 重置与全局基础
   -------------------------------------------------------------------------- */
*,
*::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, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #2d3748;
  background-color: #f5f7fa;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: #1a2a3a;
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: #e67e22;
}

ul,
ol {
  list-style: none;
}

table {
  border-collapse: collapse;
  width: 100%;
  font-variant-numeric: tabular-nums;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: 700;
  line-height: 1.3;
  color: #1a2a3a;
}

/* --------------------------------------------------------------------------
   Layout —— 全站统一外壳
   -------------------------------------------------------------------------- */
.site-header {
  background-color: #1a2a3a;
  border-bottom: 3px solid #e67e22;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 64px;
  gap: 24px;
}

.brand {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  flex-shrink: 0;
}

.brand-name {
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: 0.5px;
}

.brand:hover .brand-name {
  color: #e67e22;
}

.brand-slogan {
  font-size: 12px;
  color: rgba(255, 255, 255, 0.7);
  letter-spacing: 1px;
}

.site-nav {
  display: flex;
  align-items: center;
}

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

.nav-list li a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.85);
  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: #e67e22;
  color: #ffffff;
  font-weight: 600;
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 10px;
}

.nav-toggle-icon {
  display: block;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
  position: relative;
  transition: background-color 0.2s ease;
}

.nav-toggle-icon::before,
.nav-toggle-icon::after {
  content: "";
  position: absolute;
  left: 0;
  width: 24px;
  height: 2px;
  background-color: #ffffff;
}

.nav-toggle-icon::before {
  top: -7px;
}

.nav-toggle-icon::after {
  top: 7px;
}

/* 主内容容器 */
.site-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 32px 24px 48px;
  min-height: 60vh;
}

.inner-main {
  max-width: 1200px;
  margin: 0 auto;
  padding: 24px 24px 48px;
}

/* 面包屑 */
.breadcrumb {
  font-size: 14px;
  color: #718096;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb a {
  color: #4a5568;
}

.breadcrumb a:hover {
  color: #e67e22;
}

.breadcrumb-sep {
  color: #a0aec0;
  user-select: none;
}

.breadcrumb-current {
  color: #1a2a3a;
  font-weight: 500;
}

/* 内页标题区 */
.page-header {
  background-color: #ffffff;
  border-left: 4px solid #e67e22;
  padding: 24px 28px;
  margin-bottom: 28px;
  border-radius: 0 6px 6px 0;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.page-title {
  font-size: 32px;
  font-weight: 800;
  color: #1a2a3a;
  margin-bottom: 8px;
}

.page-description {
  font-size: 15px;
  color: #4a5568;
  line-height: 1.6;
  max-width: 720px;
}

/* 侧栏布局 */
.page-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 28px;
  align-items: start;
}

.sidebar-left .page-layout {
  grid-template-columns: 280px 1fr;
}

.sidebar-left .guide-main,
.sidebar-left .page-content {
  grid-column: 2;
}

.sidebar-left .guide-aside,
.sidebar-left .page-aside {
  grid-column: 1;
  grid-row: 1;
}

/* 页脚 */
.site-footer {
  background-color: #1a2a3a;
  color: rgba(255, 255, 255, 0.8);
  margin-top: 48px;
}

.footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 40px 24px 24px;
}

.footer-brand {
  margin-bottom: 28px;
}

.footer-site-name {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 4px;
}

.footer-slogan {
  font-size: 14px;
  color: #e67e22;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  max-width: 560px;
  line-height: 1.6;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-bottom: 24px;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 600;
  color: #ffffff;
  margin-bottom: 12px;
}

.footer-col ul li {
  margin-bottom: 6px;
}

.footer-col ul li a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.6);
  transition: color 0.2s ease;
}

.footer-col ul li a:hover {
  color: #e67e22;
}

.footer-copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
  text-align: center;
  padding-top: 16px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

/* --------------------------------------------------------------------------
   Components —— 通用组件
   -------------------------------------------------------------------------- */
/* 区块标题 */
.section-title {
  font-size: 22px;
  font-weight: 700;
  color: #1a2a3a;
  margin-bottom: 12px;
  position: relative;
  padding-left: 14px;
}

.section-title::before {
  content: "";
  position: absolute;
  left: 0;
  top: 4px;
  bottom: 4px;
  width: 4px;
  background-color: #e67e22;
  border-radius: 2px;
}

.section-desc {
  font-size: 15px;
  color: #4a5568;
  margin-bottom: 20px;
  line-height: 1.6;
}

/* 按钮 */
.btn-primary {
  display: inline-block;
  padding: 10px 24px;
  background-color: #e67e22;
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  transition: background-color 0.2s ease, transform 0.15s ease;
}

.btn-primary:hover {
  background-color: #d06a13;
  color: #ffffff;
  transform: translateY(-1px);
}

.btn-secondary {
  display: inline-block;
  padding: 10px 24px;
  background-color: transparent;
  color: #1a2a3a;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid #cbd5e0;
  border-radius: 6px;
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.btn-secondary:hover {
  border-color: #1a2a3a;
  background-color: #f7fafc;
  color: #1a2a3a;
}

/* 图片容器约束 */
figure {
  margin: 0;
}

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

/* --------------------------------------------------------------------------
   Pages —— 首页
   -------------------------------------------------------------------------- */
.home-main {
  padding-top: 0;
}

/* Hero 焦点报道区 */
.hero-section {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 32px;
  background-color: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 36px;
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
}

.hero-content {
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-title {
  font-size: 30px;
  font-weight: 800;
  color: #1a2a3a;
  line-height: 1.35;
  margin-bottom: 16px;
}

.hero-description {
  font-size: 16px;
  color: #4a5568;
  line-height: 1.7;
  margin-bottom: 24px;
}

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

.hero-media {
  position: relative;
  min-height: 320px;
}

.hero-media img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* 频道导航 */
.channel-nav-section {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 36px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

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

.channel-tag {
  display: block;
  padding: 14px 16px;
  background-color: #f5f7fa;
  border: 1px solid #e2e8f0;
  border-radius: 6px;
  font-size: 15px;
  font-weight: 600;
  color: #1a2a3a;
  text-align: center;
  transition: border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}

.channel-tag:hover {
  border-color: #e67e22;
  background-color: #fff8f0;
  color: #e67e22;
}

/* 最新动态 */
.latest-section {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 36px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

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

.latest-item {
  padding: 16px 0;
  border-bottom: 1px solid #edf2f7;
  transition: background-color 0.2s ease;
}

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

.latest-item:hover {
  background-color: #fafbfc;
}

.latest-title {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.latest-title a {
  color: #1a2a3a;
}

.latest-title a:hover {
  color: #e67e22;
}

.latest-summary {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
  margin-bottom: 6px;
}

.latest-date {
  font-size: 13px;
  color: #a0aec0;
  font-variant-numeric: tabular-nums;
}

/* 专题推荐 */
.topics-section {
  margin-bottom: 36px;
}

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

.topic-card {
  background-color: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.2s ease, transform 0.15s ease;
}

.topic-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transform: translateY(-2px);
}

.topic-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.topic-card .topic-title {
  font-size: 17px;
  font-weight: 700;
  padding: 16px 16px 4px;
}

.topic-card .topic-title a {
  color: #1a2a3a;
}

.topic-card .topic-title a:hover {
  color: #e67e22;
}

.topic-card .topic-desc {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
  padding: 0 16px 16px;
}

/* 编辑推荐 */
.recommend-section {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 36px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

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

.recommend-item {
  padding: 14px 16px;
  background-color: #f5f7fa;
  border-left: 3px solid #2ecc71;
  border-radius: 0 6px 6px 0;
  transition: background-color 0.2s ease;
}

.recommend-item:hover {
  background-color: #edf2f7;
}

.recommend-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.recommend-title a {
  color: #1a2a3a;
}

.recommend-title a:hover {
  color: #e67e22;
}

.recommend-reason {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.5;
}

/* 信息来源与反馈 */
.source-feedback-section {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.source-feedback-section .section-desc {
  margin-bottom: 12px;
}

/* --------------------------------------------------------------------------
   Pages —— 频道分类
   -------------------------------------------------------------------------- */
.channel-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  margin-bottom: 36px;
}

.channel-card {
  background-color: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
  transition: box-shadow 0.2s ease;
}

.channel-card:hover {
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.channel-card-media {
  height: 160px;
  overflow: hidden;
}

.channel-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.channel-card:hover .channel-card-media img {
  transform: scale(1.03);
}

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

.channel-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: #1a2a3a;
}

.channel-card-desc {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
  margin-bottom: 8px;
}

.channel-card-note {
  font-size: 13px;
  color: #a0aec0;
  margin-bottom: 12px;
}

.channel-card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: #e67e22;
  margin-top: auto;
  align-self: flex-start;
}

.channel-card-link:hover {
  color: #d06a13;
  text-decoration: underline;
}

/* 频道汇总表格 */
.channel-summary {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.summary-intro {
  font-size: 15px;
  color: #4a5568;
  margin-bottom: 20px;
  line-height: 1.6;
}

.summary-table-wrap {
  overflow-x: auto;
  margin-bottom: 16px;
}

.summary-table {
  min-width: 640px;
  border: 1px solid #e2e8f0;
  font-size: 14px;
}

.summary-table th {
  background-color: #1a2a3a;
  color: #ffffff;
  padding: 12px 16px;
  text-align: left;
  font-weight: 600;
  white-space: nowrap;
}

.summary-table td {
  padding: 12px 16px;
  border-bottom: 1px solid #edf2f7;
  color: #2d3748;
  line-height: 1.5;
}

.summary-table tbody tr:nth-child(even) {
  background-color: #f8fafc;
}

.summary-table tbody tr:hover {
  background-color: #fff8f0;
}

.summary-tip {
  font-size: 14px;
  color: #718096;
}

.summary-tip a {
  color: #e67e22;
  font-weight: 500;
}

/* --------------------------------------------------------------------------
   Pages —— 内容专题
   -------------------------------------------------------------------------- */
.topic-grid {
  margin-bottom: 36px;
}

.topic-grid-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.topic-card-media {
  height: 180px;
  overflow: hidden;
}

.topic-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.topic-card:hover .topic-card-media img {
  transform: scale(1.03);
}

.topic-card-body {
  padding: 20px;
}

.topic-card-title {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
}

.topic-card-title a {
  color: #1a2a3a;
}

.topic-card-title a:hover {
  color: #e67e22;
}

.topic-card-desc {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
  margin-bottom: 8px;
}

.topic-card-meta {
  font-size: 13px;
  color: #a0aec0;
  margin-bottom: 12px;
}

.topic-card-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: #e67e22;
}

.topic-card-link:hover {
  color: #d06a13;
  text-decoration: underline;
}

/* 专题介绍 */
.topic-intro {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.topic-intro-text {
  font-size: 15px;
  color: #4a5568;
  line-height: 1.7;
  margin-bottom: 14px;
}

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

/* --------------------------------------------------------------------------
   Pages —— 实用指南
   -------------------------------------------------------------------------- */
.guide-aside {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.guide-aside h2 {
  font-size: 16px;
  font-weight: 700;
  color: #1a2a3a;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e67e22;
}

.aside-link-list li {
  margin-bottom: 8px;
}

.aside-link-list li a {
  font-size: 14px;
  color: #4a5568;
  display: inline-block;
  padding: 4px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.aside-link-list li a:hover {
  color: #e67e22;
  padding-left: 6px;
}

.guide-section {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.guide-item {
  display: grid;
  grid-template-columns: 1fr 180px;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid #edf2f7;
  align-items: center;
}

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

.guide-item-text h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 6px;
}

.guide-item-text h3 a {
  color: #1a2a3a;
}

.guide-item-text h3 a:hover {
  color: #e67e22;
}

.guide-item-text p {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
  margin-bottom: 8px;
}

.guide-meta {
  font-size: 13px;
  color: #a0aec0;
  font-variant-numeric: tabular-nums;
}

.guide-link {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: #e67e22;
}

.guide-link:hover {
  color: #d06a13;
  text-decoration: underline;
}

.guide-figure {
  height: 120px;
  border-radius: 6px;
  overflow: hidden;
}

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

/* 步骤说明 */
.step-section {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.step-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.step-item {
  display: flex;
  gap: 14px;
  padding: 16px;
  background-color: #f8fafc;
  border-radius: 6px;
  border: 1px solid #edf2f7;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background-color: #1a2a3a;
  color: #ffffff;
  font-size: 15px;
  font-weight: 700;
  border-radius: 6px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

.step-content {
  font-size: 14px;
  color: #2d3748;
  line-height: 1.6;
}

.guide-note {
  background-color: #fff8f0;
  border-left: 4px solid #e67e22;
  padding: 16px 20px;
  border-radius: 0 6px 6px 0;
}

.guide-note h3 {
  font-size: 15px;
  font-weight: 700;
  color: #1a2a3a;
  margin-bottom: 6px;
}

.guide-note p {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
}

/* --------------------------------------------------------------------------
   Pages —— 深度解读
   -------------------------------------------------------------------------- */
.page-aside {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.aside-module {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.aside-title {
  font-size: 16px;
  font-weight: 700;
  color: #1a2a3a;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 2px solid #e67e22;
}

.aside-list li {
  margin-bottom: 8px;
}

.aside-list li a {
  font-size: 14px;
  color: #4a5568;
  display: inline-block;
  padding: 4px 0;
  transition: color 0.2s ease, padding-left 0.2s ease;
}

.aside-list li a:hover {
  color: #e67e22;
  padding-left: 6px;
}

.insight-list {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.insight-item {
  padding: 20px 0;
  border-bottom: 1px solid #edf2f7;
}

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

.insight-item h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 6px;
}

.insight-item h3 a {
  color: #1a2a3a;
}

.insight-item h3 a:hover {
  color: #e67e22;
}

.item-meta {
  font-size: 13px;
  color: #a0aec0;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.insight-item > p {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
  margin-bottom: 10px;
}

.insight-item > a {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  color: #e67e22;
}

.insight-item > a:hover {
  color: #d06a13;
  text-decoration: underline;
}

/* 分析框架 */
.analysis-framework {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  margin-bottom: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.framework-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 20px;
}

.framework-card {
  padding: 16px;
  background-color: #f8fafc;
  border-top: 3px solid #1a2a3a;
  border-radius: 0 0 6px 6px;
}

.framework-card h3 {
  font-size: 15px;
  font-weight: 700;
  color: #1a2a3a;
  margin-bottom: 8px;
}

.framework-card p {
  font-size: 14px;
  color: #4a5568;
  line-height: 1.6;
}

.insight-figure {
  border-radius: 6px;
  overflow: hidden;
  margin-top: 8px;
}

.insight-figure img {
  width: 100%;
  height: 240px;
  object-fit: cover;
}

.insight-figure figcaption {
  font-size: 13px;
  color: #718096;
  padding: 10px 0 0;
  text-align: center;
}

/* 方法论说明 */
.method-note {
  background-color: #ffffff;
  border-radius: 8px;
  padding: 28px;
  box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
}

.method-note p {
  font-size: 15px;
  color: #4a5568;
  line-height: 1.7;
  margin-bottom: 14px;
}

.method-note p:last-child {
  margin-bottom: 0;
}

/* --------------------------------------------------------------------------
   Pages —— 404
   -------------------------------------------------------------------------- */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
}

.error-section {
  text-align: center;
  max-width: 480px;
  padding: 40px 24px;
}

.error-code {
  font-size: 64px;
  font-weight: 800;
  color: #e67e22;
  line-height: 1;
  margin-bottom: 16px;
  font-variant-numeric: tabular-nums;
}

.error-title {
  font-size: 24px;
  font-weight: 700;
  color: #1a2a3a;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 15px;
  color: #4a5568;
  line-height: 1.6;
  margin-bottom: 24px;
}

.error-btn {
  display: inline-block;
  padding: 10px 28px;
  background-color: #1a2a3a;
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  border-radius: 6px;
  transition: background-color 0.2s ease;
}

.error-btn:hover {
  background-color: #e67e22;
  color: #ffffff;
}

/* --------------------------------------------------------------------------
   Responsive —— 响应式
   -------------------------------------------------------------------------- */
@media (max-width: 992px) {
  .hero-section {
    grid-template-columns: 1fr;
  }

  .hero-media {
    min-height: 240px;
    order: -1;
  }

  .hero-media img {
    position: relative;
    height: 240px;
  }

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

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

  .sidebar-left .guide-main,
  .sidebar-left .page-content {
    grid-column: 1;
  }

  .sidebar-left .guide-aside,
  .sidebar-left .page-aside {
    grid-column: 1;
    grid-row: auto;
  }

  .guide-aside,
  .page-aside {
    order: 2;
    margin-top: 24px;
  }

  /* 侧栏在正文之后 */
  .sidebar-left .guide-aside,
  .sidebar-left .page-aside {
    order: 2;
  }

  .sidebar-left .guide-main,
  .sidebar-left .page-content {
    order: 1;
  }

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

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

@media (max-width: 768px) {
  .header-inner {
    padding: 0 16px;
    min-height: 56px;
    flex-wrap: wrap;
  }

  .brand-name {
    font-size: 18px;
  }

  .brand-slogan {
    font-size: 11px;
  }

  .nav-toggle {
    display: block;
  }

  .nav-list {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: #1a2a3a;
    flex-direction: column;
    align-items: stretch;
    padding: 8px 16px 16px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.2);
  }

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

  .nav-list li a {
    padding: 12px 16px;
    border-radius: 4px;
  }

  .site-nav {
    position: relative;
  }

  .site-main,
  .inner-main {
    padding: 20px 16px 40px;
  }

  .page-header {
    padding: 20px;
  }

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

  .hero-content {
    padding: 24px 20px;
  }

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

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

  .hero-cta {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    text-align: center;
  }

  .channel-nav-section,
  .latest-section,
  .topics-section,
  .recommend-section,
  .source-feedback-section,
  .channel-summary,
  .topic-intro,
  .guide-section,
  .step-section,
  .insight-list,
  .analysis-framework,
  .method-note {
    padding: 20px;
  }

  .channel-tag-list {
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

  .channel-tag {
    padding: 12px 10px;
    font-size: 14px;
  }

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

  .topic-card-media,
  .channel-card-media {
    height: 160px;
  }

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

  .guide-item {
    grid-template-columns: 1fr;
  }

  .guide-figure {
    height: 160px;
    order: -1;
  }

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

  .insight-figure img {
    height: 180px;
  }

  .footer-links {
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .footer-inner {
    padding: 32px 16px 20px;
  }

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

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

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

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

  .latest-title {
    font-size: 16px;
  }

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

  .topic-card .topic-title {
    font-size: 16px;
  }

  .topic-card .topic-desc {
    font-size: 13px;
  }

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

  .hero-media,
  .hero-media img {
    min-height: 200px;
    height: 200px;
  }

  .step-item {
    flex-direction: column;
    align-items: flex-start;
  }

  .step-number {
    width: 28px;
    height: 28px;
    font-size: 14px;
  }
}