/* ========================================
   CSS Variables - China Daily Theme
   ======================================== */
:root {
  /* Primary colors */
  --primary-blue: #023f6e;
  --primary-blue-hover: #c5e1f7;

  /* Neutral grays */
  --border-gray: #dddddd;
  --footer-bg: #f8f8f8;
  --text-dark: #222222;
  --text-gray: #666666;
  --text-light: #999999;
  --text-white: #ffffff;

  /* Backgrounds */
  --bg-white: #ffffff;
  --bg-light: #f5f5f5;
  --bg-overlay: rgba(0, 0, 0, 0.5);
  --bg-nav: #00457e;

  /* Social brand colors */
  --wechat-green: #07c160;
  --weibo-red: #e6162d;

  /* Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.12);

  /* Spacing */
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 40px;

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 250ms ease;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family:
    "Microsoft YaHei",
    "PingFang SC",
    "Hiragino Sans GB",
    -apple-system,
    BlinkMacSystemFont,
    sans-serif;
  line-height: 1.8;
  color: var(--text-dark);
  background-color: var(--bg-white);
}

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

ul {
  list-style: none;
}

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

button {
  border: none;
  background: none;
  cursor: pointer;
  font-family: inherit;
}

/* ========================================
   Container
   ======================================== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* ========================================
   Top Bar
   ======================================== */
.top-bar {
  background-color: var(--bg-white);
  border-bottom: 1px solid var(--border-gray);
  height: 100px;
  position: relative;
  z-index: 100;
}

.top-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
}

.logo img {
  max-height: 56px;
  width: auto;
}

.utility-links {
  display: flex;
  gap: var(--spacing-lg);
}

.utility-links a {
  font-size: 18px;
  color: var(--text-gray);
  transition: color var(--transition-fast);
}

.utility-links a:hover {
  color: var(--primary-blue);
}

.hamburger-btn {
  display: none;
  flex-direction: column;
  width: 24px;
  height: 18px;
  justify-content: space-between;
}

.hamburger-btn span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: #073e6e;
  border-radius: 2px;
  transition: all var(--transition-base);
}

.mobile-share-btn {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
}

.mobile-share-btn img {
  width: 24px;
  height: 24px;
}

.mobile-share-btn:hover {
  opacity: 0.7;
}

/* ========================================
   Main Navigation
   ======================================== */
.main-nav {
  background-color: var(--bg-nav);
  /* border-bottom: 1px solid var(--bg-nav); */
  position: relative;
  z-index: 99;
}

.nav-list {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
}

.nav-list > li {
  position: relative;
}

.nav-list > li > a {
  display: block;
  padding: 12px var(--spacing-md);
  font-size: 18px;
  color: var(--text-white);
  transition: color var(--transition-fast);
}

.nav-list > li > a:hover {
  color: var(--primary-blue-hover);
}

/* Dropdown Arrow */
.has-dropdown {
  position: relative;
}

.dropdown-arrow {
  display: none;
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid var(--text-gray);
  pointer-events: none;
  transition: border-top-color var(--transition-fast);
}

.has-dropdown:hover .dropdown-arrow {
  border-top-color: var(--primary-blue-hover);
}

/* Dropdown Menu */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  min-width: 180px;
  background-color: rgba(0, 46, 94, 0.92);
  box-shadow: var(--shadow-md);
  /* border: 1px solid var(--border-gray); */
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
}

.dropdown-menu a {
  display: block;
  padding: 12px var(--spacing-md);
  font-size: 18px;
  color: var(--text-white);
  /* border-bottom: 1px solid var(--bg-light); */
  transition: all var(--transition-fast);
  text-align: center;
}

.dropdown-menu a:last-child {
  border-bottom: none;
}

.dropdown-menu a:hover {
  background-color: rgba(0, 78, 141, 0.92);
  color: var(--primary-blue-hover);
}

.has-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* ========================================
   Mobile Menu Panel
   ======================================== */
.mobile-menu-panel {
  position: fixed;
  top: 0;
  left: -100%;
  width: 280px;
  height: 100vh;
  background-color: var(--bg-white);

  transition: left var(--transition-base);
  z-index: 1000;
  overflow-y: auto;
}

.mobile-menu-panel.is-open {
  left: 0;
  box-shadow: 2px 0 8px rgba(0, 0, 0, 0.1);
}

.mobile-menu-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-overlay);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 999;
}

.mobile-menu-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

.mobile-menu-content {
  position: relative;
  padding: var(--spacing-md);
}

.mobile-menu-close {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-menu-close img {
  width: 20px;
  height: 20px;
  color: var(--text-gray);
}

.mobile-menu-close:hover {
  opacity: 0.7;
}

.mobile-nav-list {
  margin-top: var(--spacing-xl);
}

.mobile-nav-list > li > a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 15px;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border-gray);
}

.mobile-has-children > .mobile-nav-toggle {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 15px;
  color: var(--text-dark);
  border-bottom: 1px solid var(--border-gray);
  cursor: pointer;
}

.mobile-has-children > .mobile-nav-toggle:hover {
  color: var(--primary-blue);
}

.mobile-has-children > .mobile-nav-toggle i,
.mobile-has-children > .mobile-nav-toggle img {
  transition: transform var(--transition-base);
  width: 12px;
  height: 12px;
}

.mobile-has-children.is-open > .mobile-nav-toggle i,
.mobile-has-children.is-open > .mobile-nav-toggle img {
  transform: rotate(180deg);
}

.mobile-sub-menu {
  display: none;
  padding-left: var(--spacing-md);
  background-color: var(--bg-light);
}

.mobile-has-children.is-open > .mobile-sub-menu {
  display: block;
}

.mobile-sub-menu li a {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  font-size: 14px;
  color: var(--text-gray);
  border-bottom: 1px solid var(--border-gray);
}

.mobile-sub-menu li a:hover {
  color: var(--primary-blue);
}

/* ========================================
   Mobile Share Toolbar
   ======================================== */
.mobile-share-toolbar {
  position: fixed;
  bottom: -100%;
  left: 0;
  width: 100%;
  background-color: var(--bg-white);
  box-shadow: 0 -2px 8px rgba(0, 0, 0, 0.1);
  transition: bottom var(--transition-base);
  z-index: 1001;
  border-radius: 16px 16px 0 0;
}

.mobile-share-toolbar.is-open {
  bottom: 0;
}

.mobile-share-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) var(--spacing-lg);
  border-bottom: 1px solid var(--border-gray);
}

.mobile-share-header span {
  font-size: 16px;
  font-weight: 500;
  color: var(--text-dark);
}

.mobile-share-close {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.mobile-share-close img {
  width: 16px;
  height: 16px;
}

.mobile-share-close:hover {
  opacity: 0.7;
}

.mobile-share-options {
  display: flex;
  justify-content: center;
  padding: var(--spacing-lg);
  gap: var(--spacing-xl);
}

.mobile-share-option {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  border: none;
  background: none;
  cursor: pointer;
}

.mobile-share-option i {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--text-white);
  border-radius: 50%;
}

.mobile-share-option img {
  width: 48px;
  height: 48px;
  object-fit: cover;
}

.mobile-share-option:nth-child(1) i {
  background-color: var(--wechat-green);
}

.mobile-share-option:nth-child(2) i {
  background-color: var(--weibo-red);
}

.mobile-share-option span {
  font-size: 14px;
  color: var(--text-gray);
}

.mobile-share-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: var(--bg-overlay);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  z-index: 1000;
}

.mobile-share-overlay.is-open {
  opacity: 1;
  visibility: visible;
}

/* ========================================
   Main Content Area
   ======================================== */
.content-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

/* Breadcrumb */
.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
  font-size: 14px;
}

.breadcrumb a {
  color: var(--text-gray);
  text-decoration: none;
  transition: color var(--transition-fast);
}

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

.breadcrumb > span {
  color: var(--primary-blue);
}

.breadcrumb-separator {
  width: 16px;
  height: 16px;
  margin: 0 2px;
  vertical-align: middle;
}

.breadcrumb.is-hidden {
  display: none;
}

.article-title {
  font-size: 28px;
  font-weight: bold;
  color: var(--text-dark);
  line-height: 1.4;
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-md) 0;
  border-bottom: 1px solid var(--border-gray);
  margin-bottom: var(--spacing-lg);
}

.meta-left {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.article-source,
.article-date {
  font-size: 14px;
  color: var(--text-gray);
}

/* Share Buttons */
.share-buttons {
  display: flex;
  gap: var(--spacing-sm);
}

.share-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-white);
  transition:
    transform var(--transition-fast),
    opacity var(--transition-fast);
  cursor: pointer;
}

.share-btn:hover {
  transform: scale(1.1);
  opacity: 0.9;
}

.share-wechat {
  background-color: var(--wechat-green);
}

.share-weibo {
  background-color: var(--weibo-red);
}

/* Share button images */
.share-btn img {
  width: 18px;
  height: 18px;
  filter: brightness(0) invert(1);
}

/* SVG icon styling */
.weibo-icon {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: middle;
}

/* Article Body */
.article-body {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-dark);
}

.article-body p {
  margin-bottom: var(--spacing-lg);
}

.article-image {
  margin: var(--spacing-lg) 0;
}

.article-image img {
  max-width: 100%;
  height: auto;
  border-radius: 4px;
}

/* Video Wrapper */
.video-wrapper {
  position: relative;
  margin: var(--spacing-sm) 0;
}

.video-wrapper iframe {
  width: 100%;
  height: auto !important;
  aspect-ratio: 16 / 9;
  border: none;
  border-radius: 4px;
}

/* Article Author */
.article-author {
  text-align: right;
  font-size: 14px;
  color: var(--text-gray);
  margin-top: var(--spacing-xl);
  padding-top: var(--spacing-md);
  border-top: 1px solid var(--border-gray);
}

/* ========================================
   Footer
   ======================================== */
.site-footer {
  background-color: var(--footer-bg);
  border-top: 1px solid var(--border-gray);
  margin-top: var(--spacing-xl);
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  /* padding: var(--spacing-xl) var(--spacing-md); */
}

.footer-content {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-xl);
}

.footer-logo {
  padding: var(--spacing-xl) 0;
}

.footer-logo img {
  max-height: 60px;
  width: auto;
}

.footer-info {
  border-left: 1px solid #dddddd;
  padding: var(--spacing-xl) var(--spacing-md);
  flex: 1;
}

.footer-section {
  margin-bottom: var(--spacing-md);
}

.footer-section.security {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.footer-section.security .footer-icon {
  flex-shrink: 0;
}

.footer-section.security img {
  width: 90px;
  height: auto;
}

.footer-section p {
  font-size: 13px;
  line-height: 1.8;
  color: var(--text-gray);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, max-content);
  column-gap: var(--spacing-md);
  row-gap: var(--spacing-xs);
  align-items: center;
}

.footer-links a {
  font-size: 13px;
  color: var(--text-gray);
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--primary-blue);
  text-decoration: underline;
}

.footer-links span {
  font-size: 12px;
  color: var(--text-gray);
}

.footer-bottom-bar {
  height: 30px;
  background-color: var(--primary-blue);
}

.footer-links.wap {
  display: none;
}

@media (max-width: 768px) {
  .footer-section.security {
    display: none;
  }

  .footer-links.wap {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    align-items: center;
  }
}

/* ========================================
   Animation Classes
   ======================================== */
body.menu-open {
  overflow: hidden;
}

.hamburger-btn.is-open span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger-btn.is-open span:nth-child(2) {
  opacity: 0;
}

.hamburger-btn.is-open span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}
/* Images inside paragraphs */
.article-body p img {
  max-width: 100%;
  height: auto;
  display: inline-block;
}

/* Video wrapper inside paragraph */
.article-body p.video-wrapper {
  position: relative;
}

.article-body p.video-wrapper iframe {
  width: 100%;
  height: auto !important;
  aspect-ratio: 16 / 9;
  border: none;
}

/* Video iframe directly inside paragraph (for rich text editor content) */
.article-body p iframe {
  width: 100%;
  height: auto !important;
  aspect-ratio: 16 / 9;
  border: none;
}