:root {
  --site-paper: #f7f4ed;
  --site-surface: #fffdf8;
  --site-ink: #17342d;
  --site-text: #35443f;
  --site-muted: #6f7b76;
  --site-accent: #b8743c;
  --site-line: rgba(23, 52, 45, 0.14);
  --site-serif: "PT Serif", "Songti SC", "STSong", serif;
  --site-sans: "PT Sans Narrow", "PingFang SC", "Microsoft YaHei", sans-serif;
}

html {
  font-size: 100%;
}

body {
  background: var(--site-surface);
}

.academic-surface {
  color: var(--site-text);
  background: var(--site-surface);
}

.academic-surface .article-author-top {
  display: none;
}

.academic-surface #main {
  box-sizing: border-box;
  width: 100%;
  margin: 0;
  padding: 0 1.5rem;
}

.academic-surface #main article {
  display: block;
  float: none;
  width: auto;
  margin: 0;
}

.academic-surface #main > article {
  box-sizing: border-box;
  width: 100%;
  max-width: 780px;
  margin: 0 auto 4rem;
}

.academic-surface .article-wrap {
  box-sizing: border-box;
  width: 100%;
  color: var(--site-text);
  overflow-wrap: break-word;
}

.academic-surface .article-wrap ol > li {
  list-style-type: decimal;
}

.academic-surface .article-wrap ul > li {
  list-style-type: disc;
}

.navigation-wrapper {
  box-sizing: border-box;
  display: flex;
  float: none;
  width: min(100%, 1120px);
  margin: 0 auto;
  padding: 1.45rem 2rem 1.25rem;
  align-items: center;
  border-bottom: 1px solid var(--site-line);
  font-family: var(--site-sans);
  text-transform: none;
}

.site-name,
.top-navigation {
  display: block;
  float: none;
  width: auto;
  margin: 0;
}

.site-name {
  color: var(--site-ink);
  font-size: 1rem;
  letter-spacing: 0.03em;
}

.site-name a,
.site-name a:visited {
  color: inherit;
  border: 0;
}

.top-navigation {
  margin-left: auto;
}

.top-navigation ul {
  display: flex;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: 1.7rem;
}

.top-navigation li {
  margin: 0;
}

.top-navigation li a,
.top-navigation li a:visited {
  position: relative;
  display: inline-flex;
  min-height: 2.5rem;
  padding: 0;
  align-items: center;
  color: var(--site-muted);
  font-size: 0.9rem;
  letter-spacing: 0.035em;
  border: 0;
}

.top-navigation li a:hover,
.top-navigation li a:focus-visible,
.top-navigation li a.top-navigation-current {
  color: var(--site-ink);
  text-decoration: none;
  border: 0;
}

.top-navigation li a.top-navigation-current::after {
  position: absolute;
  right: 0;
  bottom: 0.2rem;
  left: 0;
  height: 2px;
  background: var(--site-accent);
  content: "";
}

.site-name a:focus-visible,
.top-navigation a:focus-visible {
  outline: 2px solid var(--site-accent);
  outline-offset: 4px;
}

.footer-wrap {
  box-sizing: border-box;
  margin-top: 0;
  padding: 2.25rem clamp(1.25rem, 5vw, 2rem);
  color: rgba(255, 253, 248, 0.72);
  background: var(--site-ink);
}

.footer-wrap footer {
  box-sizing: border-box;
  float: none;
  width: min(100%, 1120px);
  margin: 0 auto;
}

.footer-wrap h6 {
  margin: 0;
  color: inherit;
  font-family: var(--site-sans);
  font-size: 0.75rem;
  font-weight: 400;
  letter-spacing: 0.025em;
  line-height: 1.7;
}

.footer-wrap a,
.footer-wrap a:visited {
  color: #fffdf8;
  border-bottom-color: rgba(255, 253, 248, 0.35);
}

@media (max-width: 600px) {
  .academic-surface #main {
    padding-right: 1.25rem;
    padding-left: 1.25rem;
  }

  .academic-surface #main > article {
    margin-bottom: 3rem;
  }

  .navigation-wrapper {
    display: block;
    padding: 0.9rem 1.25rem 0.75rem;
  }

  .site-name {
    margin-bottom: 0.25rem;
  }

  .site-name a,
  .top-navigation li a,
  .top-navigation li a:visited {
    min-height: 2.75rem;
  }

  .top-navigation {
    margin-left: 0;
  }

  .top-navigation ul {
    flex-wrap: wrap;
    gap: 0 1.25rem;
  }

  .footer-wrap {
    padding-top: 1.75rem;
    padding-bottom: 1.75rem;
  }
}

@media print {
  .academic-surface #main > article {
    max-width: none;
  }

  .navigation-wrapper {
    border-bottom-color: #999;
  }

  .footer-wrap {
    color: #000;
    background: #fff;
    border-top: 1px solid #999;
  }
}