/* =========================================================
   BASE — 全站基础
   ========================================================= */
:root {
  --color-black: #000000;
  --color-white: #ffffff;
  --color-gray-900: #222222;
  --color-gray-700: #333333;
  --color-gray-500: #666666;
  --color-gray-300: #c0c0c0;
  --color-gray-100: #f5f5f5;
  --font-serif: Georgia, "Times New Roman", serif;
  --font-sans: Arial, "Helvetica Neue", Helvetica, sans-serif;
  --container-width: 1200px;
  --content-max: 720px;
  --sidebar-width: 260px;
  --radius: 6px;
  --transition: 0.2s ease;
}

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

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

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-gray-700);
  background: var(--color-white);
}

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

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

a:hover {
  color: var(--color-gray-500);
}

ul,
ol {
  list-style: none;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  line-height: 1.3;
  color: var(--color-black);
}

h2 {
  font-size: 1.5rem;
  margin-bottom: 0.75rem;
}

h3 {
  font-size: 1.125rem;
  margin-bottom: 0.5rem;
}

p {
  margin-bottom: 0.75rem;
}

time {
  color: var(--color-gray-500);
  font-size: 0.875rem;
}

/* =========================================================
   LAYOUT — 全站骨架
   ========================================================= */
.site-header {
  background: var(--color-white);
  border-bottom: 2px solid var(--color-black);
}

.header-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  position: relative;
}

.brand-link {
  display: flex;
  flex-direction: column;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--color-black);
  line-height: 1.2;
}

.brand-slogan {
  font-size: 0.75rem;
  color: var(--color-gray-500);
  letter-spacing: normal;
}

.site-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.nav-list {
  display: flex;
  gap: 2rem;
}

.nav-list a {
  font-size: 0.9375rem;
  font-weight: 400;
  padding: 0.25rem 0;
  border-bottom: 2px solid transparent;
  color: var(--color-gray-700);
}

.nav-list a:hover {
  color: var(--color-black);
  border-bottom-color: var(--color-black);
}

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

.nav-toggle {
  display: none;
  background: none;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  padding: 0.5rem;
  cursor: pointer;
  flex-direction: column;
  gap: 4px;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
}

.nav-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--color-black);
}

.site-main {
  min-height: 60vh;
}

.inner-main {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 3rem;
}

.breadcrumb {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 0.375rem;
}

.breadcrumb a {
  color: var(--color-gray-500);
}

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

.breadcrumb-current {
  color: var(--color-gray-700);
}

.page-header {
  border-bottom: 1px solid var(--color-gray-300);
  padding-bottom: 1.25rem;
  margin-bottom: 2rem;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.page-description {
  font-size: 1rem;
  color: var(--color-gray-500);
  max-width: 720px;
}

/* =========================================================
   LAYOUT — 页脚
   ========================================================= */
.site-footer {
  background: var(--color-gray-100);
  border-top: 2px solid var(--color-black);
  margin-top: 2rem;
}

.footer-inner {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 1.5rem;
}

.footer-brand {
  margin-bottom: 2rem;
}

.footer-brand-name {
  font-family: var(--font-serif);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-black);
  margin-bottom: 0.25rem;
}

.footer-brand-desc {
  font-size: 0.8125rem;
  color: var(--color-gray-500);
  max-width: 480px;
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  padding: 1.5rem 0;
  border-top: 1px solid var(--color-gray-300);
  border-bottom: 1px solid var(--color-gray-300);
}

.footer-link-group h3 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-black);
  margin-bottom: 0.75rem;
}

.footer-link-group ul li {
  margin-bottom: 0.375rem;
}

.footer-link-group a {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

.footer-link-group a:hover {
  color: var(--color-black);
}

.footer-bottom {
  padding-top: 1.25rem;
  font-size: 0.8125rem;
  color: var(--color-gray-500);
}

/* =========================================================
   COMPONENTS — 首页模块
   ========================================================= */
/* 焦点报道 */
.hero-section {
  padding: 2.5rem 1.5rem;
  background: var(--color-gray-100);
  border-bottom: 1px solid var(--color-gray-300);
}

.hero-content {
  max-width: var(--container-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 2rem;
  align-items: center;
}

.hero-figure {
  overflow: hidden;
  border: 1px solid var(--color-gray-300);
}

.hero-figure img {
  width: 100%;
  height: 360px;
  object-fit: cover;
}

.hero-kicker {
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--color-gray-500);
  margin-bottom: 0.75rem;
}

.hero-text h1 {
  font-size: 2.25rem;
  margin-bottom: 1rem;
}

.hero-summary {
  font-size: 1rem;
  color: var(--color-gray-500);
  margin-bottom: 1.5rem;
}

.hero-link {
  display: inline-block;
  font-size: 0.9375rem;
  font-weight: 700;
  padding: 0.625rem 1.25rem;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius);
}

.hero-link:hover {
  background: var(--color-gray-700);
  color: var(--color-white);
}

/* 频道导航 */
.channel-nav-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem 1.5rem;
}

.section-intro {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
  margin-bottom: 1.25rem;
}

.channel-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.channel-tag {
  display: inline-block;
  padding: 0.5rem 1.25rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  font-size: 0.9375rem;
  color: var(--color-gray-700);
  background: var(--color-white);
}

.channel-tag:hover {
  border-color: var(--color-black);
  color: var(--color-black);
  background: var(--color-gray-100);
}

/* 最新资讯 */
.latest-news-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 2.5rem;
}

.news-list {
  border-top: 1px solid var(--color-gray-300);
}

.news-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-gray-300);
}

.news-text h3 {
  font-size: 1.125rem;
  margin-bottom: 0.375rem;
}

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

.news-text h3 a:hover {
  color: var(--color-gray-500);
}

.news-text p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
  margin-bottom: 0;
}

.news-item time {
  flex-shrink: 0;
  white-space: nowrap;
}

/* 专题推荐 */
.special-recommend-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 1.5rem 1.5rem 2.5rem;
}

.special-cards {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.5rem;
}

.special-card {
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-white);
}

.special-figure {
  border-bottom: 1px solid var(--color-gray-300);
}

.special-figure img {
  width: 100%;
  height: 220px;
  object-fit: cover;
}

.special-card-body {
  padding: 1.25rem;
}

.special-card-body h3 {
  font-size: 1.25rem;
  margin-bottom: 0.5rem;
}

.special-card-body p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
  margin-bottom: 1rem;
}

.special-link {
  font-size: 0.875rem;
  font-weight: 700;
  border-bottom: 1px solid var(--color-black);
}

.special-link:hover {
  color: var(--color-gray-500);
  border-bottom-color: var(--color-gray-500);
}

/* 编辑推荐 */
.editor-picks-section {
  background: var(--color-gray-100);
  border-top: 1px solid var(--color-gray-300);
  border-bottom: 1px solid var(--color-gray-300);
  padding: 2.5rem 1.5rem;
}

.editor-picks-section .section-intro {
  max-width: var(--container-width);
  margin-left: auto;
  margin-right: auto;
}

.editor-picks-list {
  max-width: var(--container-width);
  margin: 0 auto;
}

.editor-pick-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1.5rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--color-gray-300);
}

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

.pick-text h3 {
  font-size: 1.0625rem;
  margin-bottom: 0.25rem;
}

.pick-text p {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: 0;
}

.pick-link {
  font-size: 0.875rem;
  font-weight: 700;
  flex-shrink: 0;
  white-space: nowrap;
  border-bottom: 1px solid var(--color-black);
}

.pick-link:hover {
  color: var(--color-gray-500);
  border-bottom-color: var(--color-gray-500);
}

/* 资料来源与反馈 */
.source-feedback-section {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 2.5rem 1.5rem;
}

.source-feedback-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.source-block,
.feedback-block {
  padding: 1.5rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  background: var(--color-gray-100);
}

.source-block h3,
.feedback-block h3 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-bottom: 0.75rem;
}

.source-block p,
.feedback-block p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
  margin-bottom: 0.75rem;
}

.feedback-link {
  display: inline-block;
  font-size: 0.875rem;
  font-weight: 700;
  border-bottom: 1px solid var(--color-black);
}

/* =========================================================
   COMPONENTS — 内页侧栏布局
   ========================================================= */
.page-layout,
.layout-shell {
  display: grid;
  grid-template-columns: var(--sidebar-width) 1fr;
  gap: 2rem;
  align-items: start;
}

.page-layout.sidebar-left,
.layout-shell.sidebar-left {
  grid-template-columns: var(--sidebar-width) 1fr;
}

/* 侧栏通用 */
.channel-sidebar,
.special-aside,
.article-list-sidebar,
.guide-nav {
  position: sticky;
  top: 1.5rem;
}

.sidebar-title,
.aside-title,
.guide-nav-title {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-black);
  margin-bottom: 1rem;
}

.channel-nav-list li,
.aside-list li,
.article-list li,
.guide-nav-list li {
  margin-bottom: 0.375rem;
}

.channel-nav-list a,
.aside-list a,
.article-list a,
.guide-nav-list a {
  display: block;
  font-size: 0.9375rem;
  padding: 0.375rem 0.5rem;
  color: var(--color-gray-700);
  border-left: 2px solid transparent;
}

.channel-nav-list a:hover,
.aside-list a:hover,
.article-list a:hover,
.guide-nav-list a:hover {
  color: var(--color-black);
  border-left-color: var(--color-black);
  background: var(--color-gray-100);
}

/* =========================================================
   COMPONENTS — 频道分类页
   ========================================================= */
.channel-content {
  min-width: 0;
}

.section-title {
  font-size: 1.375rem;
  margin-bottom: 1.5rem;
}

.channel-item {
  display: grid;
  grid-template-columns: 1fr 220px;
  gap: 1.5rem;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--color-gray-300);
}

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

.channel-text h3 {
  font-size: 1.25rem;
  margin-bottom: 0.75rem;
}

.channel-text p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
}

.channel-media {
  border: 1px solid var(--color-gray-300);
  overflow: hidden;
}

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

.channel-extras {
  margin-top: 1.5rem;
  padding: 1.5rem;
  background: var(--color-gray-100);
  border-radius: var(--radius);
}

.channel-extras h3 {
  font-size: 1.125rem;
  margin-bottom: 0.75rem;
}

.channel-extras p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
}

.channel-extras a {
  font-weight: 700;
  border-bottom: 1px solid var(--color-black);
}

/* =========================================================
   COMPONENTS — 专题页
   ========================================================= */
.special-aside {
  padding-right: 0.5rem;
}

.aside-block {
  margin-bottom: 2rem;
}

.aside-block .aside-text {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: 0.75rem;
}

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

.special-list {
  margin-bottom: 2.5rem;
}

.special-card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  overflow: hidden;
}

.special-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  min-height: 200px;
}

.special-card-body {
  padding: 1.5rem;
}

.special-card-body h3 {
  font-size: 1.375rem;
  margin-bottom: 0.75rem;
}

.special-card-intro {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
}

.special-card-points {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: 1rem;
}

.text-link {
  font-size: 0.875rem;
  font-weight: 700;
  border-bottom: 1px solid var(--color-black);
}

.text-link:hover {
  color: var(--color-gray-500);
  border-bottom-color: var(--color-gray-500);
}

.special-intro {
  padding: 1.5rem;
  background: var(--color-gray-100);
  border-radius: var(--radius);
}

.special-intro p {
  font-size: 0.9375rem;
  color: var(--color-gray-500);
}

.intro-links li {
  margin-bottom: 0.375rem;
}

.intro-links a {
  font-size: 0.9375rem;
  font-weight: 700;
  border-bottom: 1px solid var(--color-black);
}

/* =========================================================
   COMPONENTS — 深度解读页
   ========================================================= */
.article-list-sidebar {
  padding-right: 0.5rem;
}

.article-list-sidebar h2 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  padding-bottom: 0.5rem;
  border-bottom: 2px solid var(--color-black);
  margin-bottom: 1rem;
}

.article-list li {
  margin-bottom: 0.75rem;
}

.article-list li a {
  display: block;
  font-size: 0.9375rem;
  margin-bottom: 0.25rem;
}

.article-list li time {
  font-size: 0.8125rem;
}

.article-content-area {
  min-width: 0;
}

.full-article {
  max-width: var(--content-max);
}

.full-article h2 {
  font-size: 1.375rem;
  margin-top: 1.5rem;
}

.full-article p {
  font-size: 0.9375rem;
  color: var(--color-gray-700);
}

.article-figure {
  margin: 1.5rem 0;
  border: 1px solid var(--color-gray-300);
  overflow: hidden;
}

.article-figure img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.article-figure figcaption {
  padding: 0.75rem 1rem;
  font-size: 0.8125rem;
  color: var(--color-gray-500);
  background: var(--color-gray-100);
}

.source-note {
  margin-top: 2rem;
  padding: 1.25rem;
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  background: var(--color-gray-100);
}

.source-note h2 {
  font-family: var(--font-sans);
  font-size: 0.8125rem;
  font-weight: 700;
  text-transform: uppercase;
  margin-top: 0;
  margin-bottom: 0.75rem;
}

.source-note p {
  font-size: 0.875rem;
  color: var(--color-gray-500);
  margin-bottom: 0;
}

.source-note a {
  font-weight: 700;
  border-bottom: 1px solid var(--color-black);
}

/* =========================================================
   COMPONENTS — 阅读指南页
   ========================================================= */
.guide-nav-inner {
  padding-right: 0.5rem;
}

.guide-nav-list {
  margin-bottom: 1.5rem;
}

.guide-media {
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius);
  overflow: hidden;
}

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

.guide-media figcaption {
  padding: 0.5rem 0.75rem;
  font-size: 0.8125rem;
  color: var(--color-gray-500);
  background: var(--color-gray-100);
}

.guide-content {
  min-width: 0;
  max-width: var(--content-max);
}

.guide-section {
  margin-bottom: 2.5rem;
}

.guide-section h2 {
  font-size: 1.375rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid var(--color-gray-300);
  margin-bottom: 1rem;
}

.guide-section p {
  font-size: 0.9375rem;
  color: var(--color-gray-700);
}

.guide-section strong {
  font-weight: 700;
  color: var(--color-black);
}

.feedback-list {
  margin: 1rem 0;
  padding-left: 1.25rem;
  list-style: disc;
}

.feedback-list li {
  font-size: 0.9375rem;
  color: var(--color-gray-700);
  margin-bottom: 0.375rem;
}

.guide-section.guide-source {
  padding: 1.25rem;
  background: var(--color-gray-100);
  border-radius: var(--radius);
}

.guide-section.guide-source h2 {
  border-bottom-color: var(--color-black);
}

/* =========================================================
   COMPONENTS — 404 页
   ========================================================= */
.error-main {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60vh;
  padding: 3rem 1.5rem;
}

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

.error-code {
  font-family: var(--font-serif);
  font-size: 5rem;
  font-weight: 700;
  color: var(--color-black);
  line-height: 1;
  margin-bottom: 1rem;
}

.error-section h1 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.error-desc {
  font-size: 1rem;
  color: var(--color-gray-500);
  margin-bottom: 1.5rem;
}

.error-btn {
  display: inline-block;
  padding: 0.625rem 1.5rem;
  background: var(--color-black);
  color: var(--color-white);
  border-radius: var(--radius);
  font-weight: 700;
  margin-bottom: 1rem;
}

.error-btn:hover {
  background: var(--color-gray-700);
  color: var(--color-white);
}

.error-help {
  font-size: 0.875rem;
  color: var(--color-gray-500);
}

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

  .hero-figure img {
    height: 300px;
  }

  .page-layout,
  .layout-shell {
    grid-template-columns: 220px 1fr;
    gap: 1.5rem;
  }

  .channel-item {
    grid-template-columns: 1fr 180px;
  }

  .special-card {
    grid-template-columns: 220px 1fr;
  }
}

@media (max-width: 768px) {
  .header-inner {
    flex-wrap: wrap;
    padding: 0.75rem 1rem;
  }

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

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

  .nav-list {
    display: none;
    flex-direction: column;
    gap: 0;
    padding: 0.5rem 0;
    border-top: 1px solid var(--color-gray-300);
  }

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

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

  .nav-list a {
    display: block;
    padding: 0.75rem 0.25rem;
    border-bottom: 1px solid var(--color-gray-100);
  }

  .nav-list a.is-current {
    border-bottom-color: var(--color-gray-100);
  }

  .footer-links {
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
  }

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

  .channel-sidebar,
  .special-aside,
  .article-list-sidebar,
  .guide-nav {
    position: static;
    margin-bottom: 1.5rem;
  }

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

  .channel-media img {
    height: 200px;
  }

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

  .special-card-media img {
    height: 220px;
  }

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

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

@media (max-width: 480px) {
  .header-inner {
    padding: 0.625rem 0.875rem;
  }

  .brand-name {
    font-size: 1.25rem;
  }

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

  .hero-section {
    padding: 1.5rem 0.875rem;
  }

  .hero-content {
    gap: 1rem;
  }

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

  .hero-text h1 {
    font-size: 1.625rem;
  }

  .channel-nav-section,
  .latest-news-section,
  .special-recommend-section,
  .source-feedback-section,
  .inner-main {
    padding-left: 0.875rem;
    padding-right: 0.875rem;
  }

  .editor-picks-section {
    padding-left: 0.875rem;
    padding-right: 0.875rem;
  }

  .news-item {
    flex-direction: column;
    gap: 0.375rem;
  }

  .news-item time {
    white-space: normal;
  }

  .editor-pick-item {
    flex-direction: column;
    gap: 0.375rem;
  }

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

  .footer-inner {
    padding-left: 0.875rem;
    padding-right: 0.875rem;
  }

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

  .channel-item {
    gap: 1rem;
  }

  .special-card-body {
    padding: 1rem;
  }

  .article-figure img {
    height: 220px;
  }

  .error-code {
    font-size: 3.5rem;
  }
}