/* 科学前沿：安静的中文阅读页。无外部依赖，只用本机已有字体。 */
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: #f7f6f3;
  color: #1c1b19;
  font-family: "Noto Serif CJK SC", "Noto Serif CJK TC", "Songti SC", serif;
  font-size: 18px;
  line-height: 1.8;
}
a { color: #1c3d5a; text-underline-offset: 0.15em; }
a:hover { color: #0e2436; }

.container {
  max-width: 40rem;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.site-header {
  background: transparent;
  color: inherit;
  border-bottom: 1px solid #e3e1db;
  margin: 0;
  padding: 1.75rem 0 0;
}
.site-header .container { padding-bottom: 0.9rem; }
.site-header h1 {
  margin: 0 0 0.85rem;
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.14em;
  line-height: 1.2;
}
.site-header h1 a { color: inherit; text-decoration: none; }
.nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.35rem 1.15rem;
  margin: 0;
  padding: 0 0 0.15rem;
  list-style: none;
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 14px;
  line-height: 1.4;
}
.nav a {
  display: inline;
  padding: 0;
  color: #6b675f;
  background: none;
  border: 0;
  border-radius: 0;
  text-decoration: none;
}
.nav a:hover { color: #1c1b19; background: none; }
.nav a[aria-current="page"] {
  color: #1c1b19;
  background: none;
  border: 0;
  font-weight: 650;
}

main.container { padding-top: 1.75rem; padding-bottom: 4.5rem; }
.breadcrumb {
  margin: 0 0 0.35rem;
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 13px;
  line-height: 1.4;
  color: #6b675f;
}
.breadcrumb a { color: inherit; text-decoration: none; }
main h2 {
  margin: 0 0 1.6rem;
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 2rem;
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: 0;
}

.now > h2 {
  margin: 0.15rem 0 1.35rem;
  font-size: 1.35rem;
  font-weight: 600;
  letter-spacing: 0;
}
.domains {
  list-style: none;
  margin: 0;
  padding: 0;
  display: block;
  border-top: 1px solid #e3e1db;
}
.domains a {
  display: block;
  margin: 0;
  padding: 1.05rem 0 1.15rem;
  background: none;
  border: 0;
  border-bottom: 1px solid #e3e1db;
  border-radius: 0;
  color: inherit;
  font-weight: 400;
  text-decoration: none;
}
.domains a:hover { color: inherit; }
.domains strong {
  display: block;
  margin: 0 0 0.3rem;
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 15px;
  font-weight: 650;
  letter-spacing: 0.04em;
  line-height: 1.3;
  color: #1c1b19;
}
.domains .claim {
  display: block;
  font-family: "Noto Serif CJK SC", "Noto Serif CJK TC", serif;
  font-size: 1.05rem;
  font-weight: 400;
  line-height: 1.7;
  color: #3a3834;
}
.domains a:hover strong { color: #1c3d5a; }

.now { margin: 0 0 0.5rem; }
.now h3,
.updates h3 {
  margin: 0 0 0.75rem;
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.16em;
  line-height: 1.3;
  color: #6b675f;
}
.status {
  margin: 0;
  font-size: 1.15rem;
  font-weight: 400;
  line-height: 1.9;
}
.limit {
  margin: 1.1rem 0 0;
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 14px;
  line-height: 1.5;
  color: #6b675f;
}

.updates {
  margin-top: 3.25rem;
  padding-top: 1.6rem;
  border-top: 1px solid #cfcbc3;
}
.update { margin: 2.1rem 0 0; }
.update time {
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 13px;
  color: #6b675f;
}
.update h4 {
  margin: 0.25rem 0 0.55rem;
  font-size: 1.2rem;
  font-weight: 600;
  line-height: 1.45;
}
.update p {
  margin: 0.55rem 0;
  font-size: 1.02rem;
  line-height: 1.85;
  color: #2a2825;
}
.source {
  font-family: "Noto Sans CJK SC", "Noto Sans CJK TC", sans-serif;
  font-size: 14px;
  line-height: 1.55;
  color: #6b675f;
}
.source a { color: #1c3d5a; }

@media (max-width: 640px) {
  body { font-size: 17px; }
  main h2 { font-size: 1.7rem; }
}