/* ============================================================
   Base
   ============================================================ */
:root {
  --color-primary: #1a3a5c;
  --color-primary-dark: #142c46;
  --color-primary-light: #2a5380;
  --color-bg: #f5f7fa;
  --color-white: #ffffff;
  --color-warning: #d9534f;
  --color-text: #2c3e50;
  --color-text-light: #6b7b8d;
  --color-border: #e3e8ef;
  --color-hover: #eef2f7;
  --font-sans: Arial, Helvetica, "PingFang SC", "Microsoft YaHei", sans-serif;
  --container-width: 1200px;
  --radius: 6px;
  --radius-sm: 4px;
  --shadow-sm: 0 1px 3px rgba(26, 58, 92, 0.08);
  --shadow-md: 0 2px 8px rgba(26, 58, 92, 0.1);
  --transition: all 0.2s ease;
}

*,
*::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: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

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

a:hover {
  color: var(--color-primary-light);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-primary);
  line-height: 1.3;
  font-weight: 700;
}

h1 {
  font-size: 32px;
}

h2 {
  font-size: 24px;
}

h3 {
  font-size: 20px;
}

p {
  margin-bottom: 1em;
}

time {
  color: var(--color-text-light);
  font-size: 14px;
}

/* ============================================================
   Layout
   ============================================================ */
.site-header {
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

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

.brand-name {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-primary);
}

.brand-tagline {
  font-size: 12px;
  color: var(--color-text-light);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  width: 44px;
  height: 44px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  gap: 5px;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

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

.nav-list li {
  position: relative;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--color-text);
  border-radius: var(--radius-sm);
}

.nav-list a:hover {
  background-color: var(--color-hover);
  color: var(--color-primary);
}

.nav-list a.is-current {
  color: var(--color-primary);
  font-weight: 700;
}

.nav-list a.is-current::after {
  content: "";
  position: absolute;
  left: 16px;
  right: 16px;
  bottom: 2px;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
}

.site-main {
  flex: 1;
}

.site-main.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 24px 20px 48px;
  width: 100%;
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--color-border);
}

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

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

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

.breadcrumb-current {
  color: var(--color-primary);
  font-weight: 600;
}

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

.page-title {
  font-size: 32px;
  margin-bottom: 8px;
}

.page-description {
  font-size: 16px;
  color: var(--color-text-light);
  max-width: 720px;
}

.section-title {
  font-size: 24px;
  margin-bottom: 20px;
  position: relative;
  padding-left: 14px;
}

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

.site-footer {
  background-color: var(--color-primary-dark);
  color: rgba(255, 255, 255, 0.85);
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-brand {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-white);
}

.footer-nav {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.75);
}

.footer-nav a:hover {
  color: var(--color-white);
}

.copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.55);
}

/* ============================================================
   Components
   ============================================================ */
/* Buttons */
.btn {
  display: inline-block;
  padding: 10px 24px;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
  border: 2px solid transparent;
  min-height: 44px;
  line-height: 1.4;
}

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

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

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

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

/* Cards */
.topic-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.topic-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

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

.topic-card-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.topic-card-body h3 {
  margin-bottom: 8px;
}

.topic-card-body p {
  font-size: 14px;
  color: var(--color-text-light);
  flex: 1;
}

/* FAQ */
.faq-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}

.faq-item summary {
  padding: 16px;
  cursor: pointer;
  font-weight: 600;
  color: var(--color-text);
  list-style: none;
  position: relative;
  padding-right: 36px;
}

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

.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 16px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 20px;
  color: var(--color-primary);
}

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

.faq-item p {
  padding: 0 16px 16px;
  font-size: 15px;
}

/* ============================================================
   Pages — 首页
   ============================================================ */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px 48px;
  width: 100%;
}

.hero-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
  padding: 48px 0 40px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hero-content h1 {
  font-size: 36px;
  line-height: 1.3;
}

.hero-lead {
  font-size: 17px;
  color: var(--color-text-light);
  line-height: 1.7;
}

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

.hero-media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}

.hero-media img {
  width: 100%;
  height: 320px;
  object-fit: cover;
  border-radius: var(--radius);
}

.channel-strip {
  padding: 32px 0;
  border-top: 1px solid var(--color-border);
}

.channel-list {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.channel-item {
  display: block;
  padding: 16px 12px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  text-align: center;
  font-size: 15px;
  font-weight: 600;
  color: var(--color-text);
  transition: var(--transition);
}

.channel-item:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  background-color: var(--color-hover);
}

.latest-news {
  padding: 32px 0;
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 8px;
}

.news-tag {
  display: inline-block;
  padding: 2px 10px;
  background-color: var(--color-hover);
  color: var(--color-primary);
  border-radius: 2px;
  font-size: 13px;
}

.news-item h3 {
  margin-bottom: 8px;
}

.news-item h3 a {
  color: var(--color-text);
}

.news-item h3 a:hover {
  color: var(--color-primary);
}

.news-item p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.topics-preview {
  padding: 32px 0;
}

.topics-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.topics-preview .topic-card {
  background-color: var(--color-white);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}

.topics-preview .topic-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.topics-preview .topic-card img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.topics-preview .topic-card-body {
  padding: 16px;
}

.topics-preview .topic-card-body h3 {
  margin-bottom: 8px;
}

.topics-preview .topic-card-body h3 a {
  color: var(--color-text);
}

.topics-preview .topic-card-body h3 a:hover {
  color: var(--color-primary);
}

.topics-preview .topic-card-body p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.editor-picks {
  padding: 32px 0;
}

.picks-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.pick-item {
  display: flex;
  gap: 16px;
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: flex-start;
}

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

.pick-rank {
  font-size: 28px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  min-width: 40px;
  opacity: 0.6;
}

.pick-content h3 {
  margin-bottom: 6px;
}

.pick-content h3 a {
  color: var(--color-text);
}

.pick-content h3 a:hover {
  color: var(--color-primary);
}

.pick-content p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.source-feedback {
  padding: 32px 0;
}

.source-feedback p {
  font-size: 15px;
  color: var(--color-text-light);
  max-width: 800px;
}

.source-feedback a {
  font-weight: 600;
}

/* ============================================================
   Pages — 频道分类
   ============================================================ */
.channel-section {
  padding: 24px 0;
}

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

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

.channel-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.channel-card img {
  width: 100%;
  height: 160px;
  object-fit: cover;
}

.channel-card-body {
  padding: 16px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

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

.channel-desc {
  font-size: 14px;
  color: var(--color-text-light);
  flex: 1;
}

.channel-card-body a {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
}

.channel-preview-section {
  padding: 24px 0;
  margin-top: 16px;
}

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

.preview-item {
  padding: 20px 0;
  border-bottom: 1px solid var(--color-border);
}

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

.preview-title {
  margin-bottom: 8px;
}

.preview-title a {
  color: var(--color-text);
}

.preview-title a:hover {
  color: var(--color-primary);
}

.preview-summary {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 8px;
}

.preview-more {
  margin-top: 20px;
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.preview-more a {
  font-weight: 600;
}

/* ============================================================
   Pages — 内容专题
   ============================================================ */
.topic-grid {
  padding: 24px 0;
}

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

.topic-card-title {
  margin-bottom: 8px;
}

.topic-card-title a {
  color: var(--color-text);
}

.topic-card-title a:hover {
  color: var(--color-primary);
}

.topic-card-summary {
  font-size: 14px;
  color: var(--color-text-light);
  flex: 1;
}

.topic-link {
  display: inline-block;
  margin-top: 12px;
  font-size: 14px;
  font-weight: 600;
}

.topic-summary-block {
  padding: 24px 0;
  margin-top: 16px;
}

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

.summary-item {
  padding: 20px;
  background-color: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
}

.summary-item-title {
  margin-bottom: 8px;
}

.summary-item-text {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 12px;
}

.text-link {
  font-weight: 600;
  font-size: 14px;
}

/* ============================================================
   Pages — 实用指南
   ============================================================ */
.guide-section {
  padding: 24px 0;
}

.guide-section-alt {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 16px;
}

.section-intro {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 24px;
  max-width: 800px;
}

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

.guide-step {
  display: flex;
  gap: 16px;
  padding: 20px;
  background-color: var(--color-white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  align-items: flex-start;
}

.step-num {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  font-weight: 700;
  font-size: 16px;
  flex-shrink: 0;
}

.step-body h3 {
  margin-bottom: 6px;
}

.step-body p {
  font-size: 15px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

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

.verify-item {
  padding: 16px;
  background-color: var(--color-bg);
  border-radius: var(--radius);
  border-left: 3px solid var(--color-warning);
}

.verify-item h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.verify-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.guide-media {
  margin-top: 24px;
}

.guide-media img {
  width: 100%;
  max-height: 320px;
  object-fit: cover;
  border-radius: var(--radius);
}

.guide-media figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  text-align: center;
  padding: 8px 0 0;
}

.guide-faq {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.related-links {
  padding: 24px 0;
}

.related-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.related-list a {
  display: block;
  padding: 12px 16px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  color: var(--color-text);
  transition: var(--transition);
}

.related-list a:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

/* ============================================================
   Pages — 常见问题
   ============================================================ */
.faq-section {
  padding: 24px 0;
  border-bottom: 1px solid var(--color-border);
}

.faq-section:last-of-type {
  border-bottom: none;
}

.content-media-inline {
  float: right;
  width: 280px;
  margin: 0 0 16px 20px;
}

.content-media-inline img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  border-radius: var(--radius);
}

.content-media-inline figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 6px 0;
  text-align: center;
}

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

.tag {
  display: inline-block;
  padding: 4px 14px;
  background-color: var(--color-white);
  border: 1px solid var(--color-border);
  border-radius: 20px;
  font-size: 14px;
  color: var(--color-text);
}

.section-desc {
  font-size: 15px;
  color: var(--color-text-light);
  clear: both;
}

.section-desc a {
  font-weight: 600;
}

/* ============================================================
   Pages — 关于我们
   ============================================================ */
.about-section {
  padding: 24px 0;
}

.about-positioning {
  padding-top: 0;
}

.content-block {
  max-width: 800px;
}

.content-block p {
  font-size: 16px;
  line-height: 1.8;
}

.about-media {
  margin-top: 20px;
}

.about-media img {
  width: 100%;
  max-height: 360px;
  object-fit: cover;
  border-radius: var(--radius);
}

.about-media figcaption {
  font-size: 13px;
  color: var(--color-text-light);
  padding: 8px 0;
}

.about-principles {
  background-color: var(--color-white);
  border-radius: var(--radius);
  padding: 24px;
  margin-top: 16px;
}

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

.principle-item {
  padding: 16px;
  background-color: var(--color-bg);
  border-radius: var(--radius);
}

.principle-item h3 {
  margin-bottom: 8px;
  font-size: 17px;
}

.principle-item p {
  font-size: 14px;
  color: var(--color-text-light);
  margin-bottom: 0;
}

.about-contact .content-block {
  max-width: 800px;
}

.about-contact .content-block p {
  font-size: 15px;
}

.related-links-label {
  display: block;
  font-size: 16px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: 12px;
}

.related-links-item {
  display: inline-block;
  margin-right: 16px;
  font-size: 15px;
  font-weight: 600;
}

/* ============================================================
   Pages — 404
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  padding: 48px 20px;
}

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

.error-code {
  font-size: 80px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1;
  margin-bottom: 16px;
}

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

.error-desc {
  font-size: 16px;
  color: var(--color-text-light);
  margin-bottom: 24px;
}

.error-btn {
  display: inline-block;
  padding: 10px 32px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 24px;
  transition: var(--transition);
}

.error-btn:hover {
  background-color: var(--color-primary-light);
  color: var(--color-white);
}

.error-help {
  font-size: 14px;
  color: var(--color-text-light);
}

.error-help a {
  font-weight: 600;
  margin: 0 8px;
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 768px) {
  .header-inner {
    height: auto;
    min-height: 60px;
    padding: 8px 16px;
    flex-wrap: wrap;
    gap: 8px;
  }

  .brand-name {
    font-size: 20px;
  }

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

  .nav-toggle {
    display: flex;
    order: 3;
  }

  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    padding: 8px 0 12px;
    gap: 0;
    order: 4;
  }

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

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

  .nav-list a {
    padding: 12px 8px;
    border-radius: var(--radius-sm);
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  .nav-list a.is-current::after {
    display: none;
  }

  .nav-list a.is-current {
    background-color: var(--color-hover);
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
    padding: 16px;
  }

  .footer-nav {
    gap: 12px;
  }

  .footer-nav a {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

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

  .breadcrumb {
    margin-bottom: 16px;
    font-size: 13px;
    flex-wrap: wrap;
  }

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

  .section-title {
    font-size: 20px;
    margin-bottom: 16px;
  }

  /* 首页 */
  .home-main {
    padding: 0 16px 40px;
  }

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

  .hero-content h1 {
    font-size: 28px;
  }

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

  .hero-media img {
    height: 220px;
  }

  .channel-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }

  .channel-item {
    padding: 12px 8px;
    font-size: 14px;
    min-height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .news-item {
    padding: 16px 0;
  }

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

  .topics-preview .topic-card img {
    height: 180px;
  }

  .pick-item {
    padding: 16px 0;
  }

  .pick-rank {
    font-size: 24px;
    min-width: 32px;
  }

  .source-feedback {
    padding: 24px 0;
  }

  /* 频道分类 */
  .channel-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .channel-card img {
    height: 180px;
  }

  .preview-item {
    padding: 16px 0;
  }

  /* 内容专题 */
  .topic-cards {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .summary-item {
    padding: 16px;
  }

  /* 实用指南 */
  .guide-section-alt {
    padding: 16px;
  }

  .guide-step {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }

  .step-num {
    width: 32px;
    height: 32px;
    font-size: 15px;
  }

  .verify-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .guide-media img {
    max-height: 220px;
  }

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

  .related-list a {
    min-height: 44px;
    display: flex;
    align-items: center;
  }

  /* 常见问题 */
  .content-media-inline {
    float: none;
    width: 100%;
    margin: 0 0 16px;
  }

  .content-media-inline img {
    height: 200px;
  }

  .category-tags {
    gap: 6px;
  }

  .tag {
    padding: 6px 12px;
    min-height: 36px;
    display: inline-flex;
    align-items: center;
  }

  /* 关于我们 */
  .about-principles {
    padding: 16px;
  }

  .principle-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .principle-item {
    padding: 14px;
  }

  .about-media img {
    max-height: 240px;
  }

  .related-links-item {
    display: block;
    margin: 0 0 12px;
    min-height: 44px;
    line-height: 44px;
  }

  .related-links-label {
    margin-bottom: 8px;
  }

  /* 404 */
  .error-code {
    font-size: 64px;
  }

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

  .error-btn {
    min-height: 44px;
    display: inline-flex;
    align-items: center;
  }

  .error-help {
    display: flex;
    flex-direction: column;
    gap: 4px;
  }
}

@media (max-width: 480px) {
  .channel-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .channel-item {
    font-size: 13px;
    padding: 10px 6px;
  }

  .hero-actions {
    flex-direction: column;
    gap: 8px;
  }

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

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

  .news-meta {
    flex-wrap: wrap;
    gap: 8px;
  }

  .news-tag {
    font-size: 12px;
    padding: 2px 8px;
  }

  .news-item h3 {
    font-size: 17px;
  }

  .news-item p {
    font-size: 14px;
  }

  .pick-content h3 {
    font-size: 17px;
  }

  .pick-content p {
    font-size: 13px;
  }

  .topic-card-body h3 {
    font-size: 17px;
  }

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

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

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

  .preview-title {
    font-size: 17px;
  }

  .preview-summary {
    font-size: 14px;
  }

  .summary-item-title {
    font-size: 17px;
  }

  .summary-item-text {
    font-size: 14px;
  }

  .step-body h3 {
    font-size: 16px;
  }

  .step-body p {
    font-size: 14px;
  }

  .verify-item h3 {
    font-size: 16px;
  }

  .verify-item p {
    font-size: 13px;
  }

  .principle-item h3 {
    font-size: 16px;
  }

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

  .faq-item summary {
    font-size: 15px;
    padding: 14px 36px 14px 14px;
  }

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

/* ============================================================
   Reduced motion
   ============================================================ */
@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;
  }
}