.article-page {
  margin: 0;
  background: #f7f1e6;
  color: #211d17;
  font: 17px/1.85 "PingFang SC", "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif;
}
.article-page a { color: #a63a2b; }
.article-page .content-header {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 12px 16px;
  padding: 14px 20px;
  border-bottom: 1px solid rgba(44, 37, 27, 0.14);
}
.article-page .content-header > a { color: #211d17; font-weight: 600; text-decoration: none; }
.article-page .content-header nav a { color: #4e4639; margin-left: 16px; font-size: 15px; text-decoration: none; }
.article-page .content-header .lang-menu { position: relative; display: inline-block; margin-left: 16px; vertical-align: middle; }
.article-page .content-header .lang-menu-toggle {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 32px;
  font-size: 15px;
  color: #4e4639;
  cursor: pointer;
  list-style: none;
}
.article-page .content-header .lang-menu-toggle::-webkit-details-marker { display: none; }
.article-page .content-header .lang-menu-toggle:hover,
.article-page .content-header .lang-menu[open] .lang-menu-toggle { color: #211d17; }
.article-page .content-header .lang-menu-toggle:focus-visible { outline: 2px solid #a63a2b; outline-offset: 3px; }
.article-page .content-header .lang-menu-caret {
  width: 5px;
  height: 5px;
  border-right: 1px solid currentColor;
  border-bottom: 1px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}
.article-page .content-header .lang-menu[open] .lang-menu-caret { transform: translateY(2px) rotate(-135deg); }
.article-page .content-header .lang-menu-list {
  position: absolute;
  top: calc(100% + 10px);
  right: 0;
  z-index: 1;
  min-width: 140px;
  margin: 0;
  padding: 6px;
  list-style: none;
  background: #f7f1e6;
  border: 1px solid rgba(44, 37, 27, 0.14);
  border-radius: 6px;
  box-shadow: 0 14px 34px rgba(44, 37, 27, 0.14);
}
.article-page .content-header .lang-menu-list a {
  display: flex;
  align-items: center;
  min-height: 40px;
  margin-left: 0;
  padding: 8px 12px;
  font-size: 14px;
  color: #4e4639;
  border-radius: 4px;
  white-space: nowrap;
  text-decoration: none;
}
.article-page .content-header .lang-menu-list a:hover,
.article-page .content-header .lang-menu-list a[aria-current="page"] { color: #a63a2b; background: rgba(166, 58, 43, 0.07); }
@media (max-width: 720px) {
  .article-page .content-header { position: relative; }
  .article-page .content-header .lang-menu { position: static; }
  .article-page .content-header .lang-menu-toggle { min-height: 44px; }
  .article-page .content-header .lang-menu-list { top: calc(100% + 6px); left: 16px; right: 16px; min-width: 0; }
}
.article-page .content { max-width: 720px; margin: 0 auto; padding: 28px 20px 40px; }
.article-page .breadcrumb { font-size: 14px; color: #6d6557; margin-bottom: 12px; }
.article-page .breadcrumb a { color: #6d6557; }
.article-page h1 { font-size: 30px; line-height: 1.35; margin: 8px 0 14px; }
.article-page h2 {
  font-size: 21px;
  margin: 34px 0 10px;
  padding-top: 10px;
  border-top: 1px solid rgba(44, 37, 27, 0.14);
}
.article-page .lead { font-size: 18px; color: #4e4639; }
.article-page ul { padding-left: 22px; }
.article-page li { margin: 6px 0; }
.article-page table { width: 100%; border-collapse: collapse; margin: 14px 0; font-size: 15px; }
.article-page th,
.article-page td { border-bottom: 1px solid rgba(44, 37, 27, 0.14); padding: 9px 8px; text-align: left; }
.article-page .content-footer {
  max-width: 720px;
  margin: 0 auto;
  padding: 0 20px 40px;
  font-size: 14px;
  color: #6d6557;
}
.learn-links,
.site-feedback { max-width: 720px; margin: 40px auto 0; padding: 0 20px; }
.learn-links h2,
.site-feedback-title {
  font-family: "Songti SC", "STSong", "Noto Serif CJK SC", "Source Han Serif SC", "SimSun", serif;
  font-weight: 500; letter-spacing: 0.05em; color: #211d17;
}
.learn-links h2 { font-size: 24px; line-height: 1.4; margin: 0 0 12px; padding: 0; border: 0; }
.learn-links ul { list-style: none; padding: 0; margin: 0; }
.learn-links li { margin: 8px 0; }
.learn-links a { color: #a63a2b; text-decoration: none; }
.article-page .learn-links {
  padding: 0;
  font: 16px/normal -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  color: #1f1c18;
}
@media (max-width: 640px) {
  .learn-links a { display: inline-flex; align-items: center; min-height: 44px; }
}
.site-feedback { max-width: 720px; margin: 36px auto 0; padding: 0 20px; }
.site-feedback summary {
  display: inline-flex; flex-wrap: wrap; align-items: center; gap: 4px 12px;
  padding: 10px 18px; border: 1px solid rgba(0, 0, 0, 0.18); border-radius: 999px;
  cursor: pointer; list-style: none; min-height: 44px;
}
.site-feedback summary::-webkit-details-marker { display: none; }
.site-feedback summary::after { content: '+'; margin-left: auto; font-size: 18px; color: #6d6557; }
.site-feedback[open] summary::after { content: '−'; }
.site-feedback-title {
  position: absolute; width: 1px; height: 1px; margin: -1px; padding: 0; overflow: hidden;
  clip: rect(0 0 0 0); clip-path: inset(50%); white-space: nowrap; border: 0;
}
.site-feedback-hint { font-size: 14px; line-height: 1.6; color: #6d6557; }
.site-feedback-form { display: flex; flex-direction: column; gap: 10px; padding: 4px 0 18px; }
.site-feedback-ratings { border: 0; margin: 0; padding: 0; }
.site-feedback-ratings legend { padding: 0; margin-bottom: 6px; font-size: 15px; color: #4e4639; }
.site-feedback-ratings label { margin-right: 18px; font-size: 15px; cursor: pointer; }
.site-feedback-label { font-size: 15px; color: #4e4639; }
.site-feedback textarea {
  width: 100%; box-sizing: border-box; padding: 8px 10px; resize: vertical;
  border: 1px solid rgba(0, 0, 0, 0.15); border-radius: 6px;
  background: rgba(255, 255, 255, 0.6); font: inherit; font-size: 15px; line-height: 1.6;
}
.site-feedback-actions { display: flex; align-items: center; flex-wrap: wrap; gap: 12px; }
.site-feedback-submit {
  padding: 8px 18px; border: 0; border-radius: 999px;
  background: #a63a2b; color: #fff; font: inherit; font-size: 15px; font-weight: 500; cursor: pointer;
}
.site-feedback-submit:disabled { opacity: 0.5; cursor: default; }
.site-feedback-status { margin: 0; font-size: 14px; color: #3f6b3a; }
.site-feedback-status.is-error { color: #a63a2b; }
.site-feedback-status[hidden] { display: none; }