/* ============================================================
   BASE — 变量、重置、全局基础
   ============================================================ */
:root {
  --color-ink: #1a1a1a;
  --color-bg: #f5f5f5;
  --color-accent: #c9a227;
  --color-white: #ffffff;
  --color-gray: #333333;
  --color-muted: #666666;
  --color-line: #e5e5e5;
  --font-stack: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
  --container-width: 1200px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-stack);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-ink);
  background-color: var(--color-bg);
}

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

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

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

ul,
ol {
  list-style: none;
}

h1,
h2,
h3,
h4 {
  line-height: 1.3;
  font-weight: 700;
}

/* ============================================================
   LAYOUT — 全站骨架（页头 / 页脚 / 主容器）
   ============================================================ */
.site-body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

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

.brand-name {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-ink);
}

.brand-slogan {
  font-size: 0.75rem;
  color: var(--color-muted);
}

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

.nav-list {
  display: flex;
  gap: 8px;
}

.nav-list a {
  display: block;
  padding: 8px 16px;
  font-size: 0.9375rem;
  color: var(--color-gray);
  border-radius: var(--radius-sm);
}

.nav-list a:hover {
  color: var(--color-accent);
  background-color: rgba(201, 162, 39, 0.08);
}

.nav-list a.is-current {
  color: var(--color-accent);
  font-weight: 600;
  background-color: rgba(201, 162, 39, 0.1);
}

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

.toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-ink);
  border-radius: 2px;
}

.site-main {
  flex: 1;
  width: 100%;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

.site-footer {
  background-color: var(--color-ink);
  color: #ccc;
  margin-top: auto;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 48px 24px 24px;
}

.footer-brand {
  margin-bottom: 32px;
}

.footer-name {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 0.875rem;
  color: #999;
  max-width: 480px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
  padding-bottom: 32px;
  border-bottom: 1px solid #333;
}

.footer-heading {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--color-white);
  margin-bottom: 12px;
}

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

.footer-col a {
  color: #999;
  font-size: 0.875rem;
}

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

.footer-copy {
  padding-top: 24px;
  font-size: 0.8125rem;
  color: #777;
}

/* ============================================================
   COMPONENTS — 通用模块（面包屑 / 页标题 / 区块标题）
   ============================================================ */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 24px;
}

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

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

.breadcrumb-sep {
  color: #aaa;
}

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

.page-header {
  margin-bottom: 40px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-ink);
  margin-bottom: 12px;
}

.page-description {
  font-size: 1rem;
  color: var(--color-muted);
  max-width: 720px;
}

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

.section-title {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-ink);
}

.section-subtitle {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-top: 6px;
}

/* ============================================================
   PAGES — 首页
   ============================================================ */
.home-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px 64px;
}

/* 焦点报道 */
.focus-report {
  padding: 48px 0;
}

.focus-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  align-items: start;
}

.focus-main-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.focus-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

.focus-body {
  padding: 24px;
}

.focus-headline {
  font-size: 1.375rem;
  margin-bottom: 12px;
}

.focus-summary {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.focus-tag {
  display: inline-block;
  padding: 4px 12px;
  background-color: rgba(201, 162, 39, 0.1);
  color: var(--color-accent);
  font-size: 0.8125rem;
  border-radius: var(--radius-sm);
}

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

.focus-mini-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 20px 24px;
}

.mini-title {
  font-size: 1rem;
  margin-bottom: 6px;
}

.mini-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* 频道导航带 */
.channel-strip {
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.tag-item {
  display: inline-block;
  padding: 10px 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: 999px;
  font-size: 0.9375rem;
  color: var(--color-gray);
}

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

/* 最新资讯 */
.latest-news {
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

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

.news-item {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: 20px;
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 16px;
}

.news-thumb {
  aspect-ratio: 4 / 3;
  overflow: hidden;
  border-radius: var(--radius-sm);
}

.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.news-body {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.news-headline {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.news-summary {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 8px;
}

.news-date {
  font-size: 0.8125rem;
  color: #999;
}

/* 专题推荐 */
.topic-spotlight {
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

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

.topic-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: block;
}

.topic-card:hover {
  border-color: var(--color-accent);
}

.topic-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

.topic-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition);
}

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

.topic-info {
  padding: 20px;
}

.topic-name {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.topic-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* 编辑推荐 */
.editor-picks {
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

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

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

.pick-title {
  font-size: 1rem;
  margin-bottom: 8px;
}

.pick-reason {
  font-size: 0.875rem;
  color: var(--color-muted);
}

/* 信息来源 */
.source-info {
  padding: 32px 0;
  border-top: 1px solid var(--color-line);
}

.source-content {
  margin-top: 16px;
  max-width: 720px;
}

.source-content p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

/* ============================================================
   PAGES — 频道分类（channels.html）
   ============================================================ */
.channel-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-bottom: 48px;
}

.channel-grid .section-title {
  grid-column: 1 / -1;
  margin-bottom: 8px;
}

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

.channel-card-media {
  aspect-ratio: 16 / 9;
  overflow: hidden;
}

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

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

.channel-card-title {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.channel-card-desc {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 16px;
  flex: 1;
}

.channel-card-link {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
}

.channel-summary {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 32px;
}

.channel-summary .section-title {
  margin-bottom: 16px;
}

.summary-content p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

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

/* ============================================================
   PAGES — 内容专题（topics.html）
   ============================================================ */
.topic-list {
  margin-bottom: 48px;
}

.topic-list > h2 {
  font-size: 1.5rem;
  margin-bottom: 24px;
}

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

.topic-card {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

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

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

.topic-card-body h3 {
  font-size: 1.125rem;
  margin-bottom: 8px;
}

.topic-card-body p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 16px;
  flex: 1;
}

.topic-card-body a {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
}

.topic-intro {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-bottom: 48px;
}

.topic-intro h2 {
  font-size: 1.5rem;
  margin-bottom: 16px;
}

.intro-content p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 12px;
}

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

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

.related-links h2 {
  font-size: 1.25rem;
  margin-bottom: 16px;
}

.related-links li {
  margin-bottom: 12px;
  padding-left: 16px;
  position: relative;
}

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

.related-links a {
  font-size: 0.9375rem;
  color: var(--color-gray);
}

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

/* ============================================================
   PAGES — 实用指南（guide.html）
   ============================================================ */
.layout-shell {
  max-width: 800px;
}

.article-content {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 40px;
}

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

.guide-section:last-child {
  margin-bottom: 0;
}

.guide-section h2 {
  font-size: 1.375rem;
  margin-bottom: 16px;
}

.guide-section p {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.guide-figure {
  margin: 24px 0;
}

.guide-figure img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  border-radius: var(--radius-md);
}

.guide-figure figcaption {
  font-size: 0.8125rem;
  color: #999;
  margin-top: 8px;
  text-align: center;
}

.guide-steps {
  counter-reset: step;
  margin-top: 24px;
}

.guide-steps li {
  position: relative;
  padding-left: 56px;
  margin-bottom: 24px;
  counter-increment: step;
}

.guide-steps li::before {
  content: counter(step);
  position: absolute;
  left: 0;
  top: 0;
  width: 36px;
  height: 36px;
  background-color: var(--color-accent);
  color: var(--color-white);
  font-weight: 700;
  font-size: 0.9375rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.guide-steps h3 {
  font-size: 1rem;
  margin-bottom: 6px;
}

.guide-steps p {
  font-size: 0.875rem;
  color: var(--color-muted);
  margin-bottom: 0;
}

/* ============================================================
   PAGES — 深度解读（insight.html）
   ============================================================ */
.insight-articles {
  margin-bottom: 48px;
}

.insight-articles .section-heading {
  font-size: 1.5rem;
}

.insight-item {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 24px;
}

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

.insight-media {
  aspect-ratio: 21 / 9;
  overflow: hidden;
}

.insight-media figure {
  width: 100%;
  height: 100%;
}

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

.insight-body {
  padding: 24px;
}

.insight-title {
  font-size: 1.25rem;
  margin-bottom: 8px;
}

.insight-meta {
  font-size: 0.8125rem;
  color: #999;
  margin-bottom: 12px;
}

.insight-excerpt {
  font-size: 0.9375rem;
  color: var(--color-muted);
  margin-bottom: 16px;
}

.insight-link a {
  font-size: 0.875rem;
  color: var(--color-accent);
  font-weight: 500;
}

.insight-extras {
  background-color: var(--color-white);
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  padding: 32px;
  margin-top: 48px;
}

.insight-extras .section-heading {
  font-size: 1.375rem;
  margin-bottom: 16px;
}

.extras-text {
  font-size: 0.9375rem;
  color: var(--color-muted);
}

.extras-text a {
  color: var(--color-accent);
  margin-right: 16px;
}

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

/* ============================================================
   PAGES — 404 错误页
   ============================================================ */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 48px 24px;
}

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

.error-code {
  font-size: 4rem;
  font-weight: 700;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: 16px;
}

.error-title {
  font-size: 1.5rem;
  margin-bottom: 12px;
}

.error-desc {
  font-size: 1rem;
  color: var(--color-muted);
  margin-bottom: 32px;
}

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

.error-home-btn,
.error-channel-link {
  display: inline-block;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
  font-weight: 500;
}

.error-home-btn {
  background-color: var(--color-accent);
  color: var(--color-white);
}

.error-home-btn:hover {
  background-color: #b08f1f;
  color: var(--color-white);
}

.error-channel-link {
  background-color: var(--color-white);
  color: var(--color-gray);
  border: 1px solid var(--color-line);
}

.error-channel-link:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

.error-suggestion {
  font-size: 0.875rem;
  color: #999;
}

/* ============================================================
   RESPONSIVE — 响应式断点
   ============================================================ */
@media (max-width: 768px) {
  .header-inner {
    height: 64px;
    padding: 0 16px;
  }

  .nav-toggle {
    display: flex;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-line);
    padding: 0 16px;
    display: block;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
  }

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

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

  .nav-list a {
    padding: 12px 8px;
    border-bottom: 1px solid var(--color-line);
    border-radius: 0;
  }

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

  .inner-main {
    padding: 24px 16px 48px;
  }

  .home-main {
    padding: 0 16px 48px;
  }

  .page-title {
    font-size: 1.625rem;
  }

  .focus-report {
    padding: 32px 0;
  }

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

  .news-item {
    grid-template-columns: 120px 1fr;
    gap: 12px;
  }

  .news-headline {
    font-size: 1rem;
  }

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

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

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

  .article-content {
    padding: 24px;
  }

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

  .error-code {
    font-size: 3rem;
  }

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

  .error-home-btn,
  .error-channel-link {
    width: 100%;
    max-width: 280px;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .brand-name {
    font-size: 1.0625rem;
  }

  .brand-slogan {
    font-size: 0.6875rem;
  }

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

  .news-thumb {
    aspect-ratio: 16 / 9;
  }

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

  .section-title {
    font-size: 1.25rem;
  }

  .focus-headline {
    font-size: 1.125rem;
  }

  .guide-steps li {
    padding-left: 48px;
  }

  .guide-steps li::before {
    width: 32px;
    height: 32px;
    font-size: 0.8125rem;
  }
}