:root {
  color-scheme: light;
  --people-red: #c40000;
  --text: #222;
  --muted: #777;
  --line: #e5e5e5;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: #fff;
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

a { color: inherit; text-decoration: none; }

.site-header { background: #fff; }
.header-inner { width: min(1100px, calc(100% - 36px)); margin: 0 auto; padding: 25px 0 20px; display: flex; align-items: baseline; gap: 18px; }
.text-logo { color: #b60000; font-size: 30px; font-weight: 800; letter-spacing: .08em; }
.site-tagline { color: #999; font-size: 13px; letter-spacing: .2em; }

.main-nav { border-top: 3px solid var(--people-red); background: #d50000; color: #fff; }
.nav-inner { width: min(1200px, 100%); margin: auto; display: flex; justify-content: center; overflow-x: auto; }
.nav-inner a { flex: 0 0 auto; padding: 15px 23px; font-size: 16px; }
.nav-inner a:hover, .nav-inner a.active { background: #ae0000; }

.page-shell { width: min(1100px, calc(100% - 36px)); margin: 0 auto; }
.breadcrumb { padding: 25px 0 18px; color: #777; border-bottom: 1px solid var(--line); font-size: 14px; }
.breadcrumb a:hover { color: var(--people-red); }

article { max-width: 900px; margin: 0 auto; padding: 35px 0 60px; }
.channel-name { margin: 0 0 13px; color: var(--people-red); text-align: center; font-size: 16px; }
h1 { margin: 0; text-align: center; font: 700 42px/1.45 "Microsoft YaHei", "PingFang SC", sans-serif; }
.article-meta { display: flex; justify-content: center; gap: 30px; margin: 24px 0 33px; padding-bottom: 22px; border-bottom: 1px solid var(--line); color: var(--muted); font-size: 14px; }

.article-body { max-width: 820px; margin: auto; font-family: SimSun, "Songti SC", serif; font-size: 19px; line-height: 2.05; }
.article-body p { margin: 0 0 22px; text-indent: 2em; }
.article-body h2 { margin: 34px 0 13px; font-family: "Microsoft YaHei", "PingFang SC", sans-serif; font-size: 21px; line-height: 1.6; }
.abridged-note { margin: 30px 0; padding: 15px 18px; background: #f6f6f6; color: #777; text-align: center; font: 14px/1.7 "Microsoft YaHei", sans-serif; }
.article-body .paper-info { text-align: right; text-indent: 0; color: #555; font-size: 16px; }
.source-link { margin-top: 35px; text-align: right; font-size: 14px; }
.source-link a { display: inline-block; padding-bottom: 3px; color: var(--people-red); border-bottom: 1px solid currentColor; }

.site-footer { border-top: 1px solid var(--line); padding: 30px 18px 40px; background: #f7f7f7; color: #666; text-align: center; font-size: 13px; line-height: 1.9; }
.site-footer p { margin: 4px 0; }

@media (max-width: 760px) {
  .header-inner { padding: 17px 0; }
  .text-logo { font-size: 24px; }
  .site-tagline { display: none; }
  .nav-inner { justify-content: flex-start; }
  .nav-inner a { padding: 12px 16px; font-size: 14px; }
  article { padding-top: 28px; }
  .channel-name { font-size: 14px; }
  h1 { font-size: 28px; line-height: 1.5; }
  .article-meta { flex-direction: column; align-items: center; gap: 7px; margin: 18px 0 25px; }
  .article-body { font-size: 17px; line-height: 1.95; }
  .article-body h2 { font-size: 19px; }
}