:root {
  color-scheme: light;
  background: #fbfbf7;
  color: #20241f;
  font-family: Inter, "PingFang SC", "Microsoft YaHei", sans-serif;
  font-synthesis-weight: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: #fbfbf7;
}

a {
  color: inherit;
}

main {
  padding: clamp(42px, 6vw, 78px) max(20px, calc((100vw - 1120px) / 2)) clamp(52px, 7vw, 90px);
}

.article {
  counter-reset: paper-section;
  display: grid;
  gap: 24px;
  max-width: 760px;
  margin: 0 auto;
  padding: 0;
  background: transparent;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans CJK SC", Arial, sans-serif;
}

.article-header {
  display: grid;
  gap: 14px;
  padding-bottom: 20px;
  border-bottom: 1px solid #2f3833;
}

.eyebrow {
  margin: 0;
  color: #5b665f;
  font-size: 13px;
  font-weight: 650;
  letter-spacing: 0;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1 {
  max-width: 15em;
  color: #121613;
  font-size: clamp(28px, 3.4vw, 38px);
  font-weight: 720;
  line-height: 1.24;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h2 {
  color: #171b18;
  font-size: 20px;
  font-weight: 700;
  line-height: 1.42;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

h3 {
  color: #20241f;
  font-size: 17px;
  font-weight: 680;
  line-height: 1.45;
  letter-spacing: 0;
}

p,
li,
dt,
dd {
  color: #202822;
  font-size: 16px;
  line-height: 1.86;
  overflow-wrap: anywhere;
}

strong {
  color: #111411;
  font-weight: 700;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0;
  margin: 0;
  padding: 4px 0 0;
  border-top: 0;
}

.article-meta dt {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
  white-space: nowrap;
}

.article-meta dd {
  margin: 0;
  color: #323a34;
  font-size: 14px;
  line-height: 1.6;
}

.article-meta dd::after {
  content: "｜";
  margin: 0 7px;
  color: #909890;
}

.article-meta dd:last-child::after {
  content: "";
  margin: 0;
}

.paper-abstract,
.paper-keywords {
  display: grid;
  gap: 8px;
  padding: 0 0 18px;
  border-bottom: 1px solid #d8ddd6;
}

.paper-keywords {
  display: block;
}

.paper-abstract h2,
.paper-keywords h2 {
  font-size: 16px;
  font-weight: 700;
}

.paper-keywords h2 {
  display: inline;
  margin-right: 0;
}

.paper-keywords h2::after {
  content: "：";
}

.paper-keywords ul {
  display: inline;
  margin: 0;
  padding: 0;
  list-style: none;
}

.paper-keywords li {
  display: inline;
  padding: 0;
  border: 0;
  background: transparent;
  color: #263029;
  font-size: 15px;
  line-height: 1.72;
}

.paper-keywords li::after {
  content: "；";
  margin-right: 6px;
}

.paper-keywords li:last-child::after {
  content: "";
  margin-right: 0;
}

.paper-section {
  counter-increment: paper-section;
  display: grid;
  gap: 12px;
  padding-top: 18px;
  border-top: 1px solid #e2e5df;
}

.paper-section > h2::before {
  content: counter(paper-section) ". ";
  color: #171b18;
}

.paper-section--conclusion {
  padding: 20px 0;
  border: 0;
  border-top: 1px solid #2f3833;
  border-bottom: 1px solid #d8ddd6;
  background: transparent;
}

.paper-section--conclusion > h2::before,
.paper-section--references > h2::before {
  color: #171b18;
}

.paper-section--references > h2::before {
  content: "";
}

ol,
ul {
  display: grid;
  gap: 8px;
  margin: 0;
  padding-left: 22px;
}

.refs {
  font-size: 15px;
}

.refs a {
  color: #234f45;
  font-weight: 650;
  text-underline-offset: 3px;
}

.answer {
  display: grid;
  gap: 12px;
  min-width: 0;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px 24px;
}

.fact {
  display: grid;
  gap: 8px;
  min-width: 0;
  padding: 0;
  border: 0;
  background: transparent;
}

.article-footnote {
  color: #4f5a52;
  font-size: 14px;
  line-height: 1.75;
}

.site-bar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 72px;
  padding: 0 max(20px, calc((100vw - 1180px) / 2));
  border-bottom: 1px solid #dfe5dc;
  background: #fbfbf7;
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
  color: #17201b;
  text-decoration: none;
}

.brand-mark {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 42px;
  height: 42px;
  border: 1px solid #b9c8bd;
  background: transparent;
  color: #123c37;
  font-size: 18px;
  font-weight: 850;
  letter-spacing: 0;
}

.brand-copy {
  display: grid;
  gap: 2px;
  min-width: 0;
}

.brand-copy .eyebrow {
  margin: 0;
  color: #64716a;
  font-size: 12px;
  font-weight: 800;
  line-height: 1.3;
  text-transform: uppercase;
}

.brand-copy strong {
  color: #17201b;
  font-size: 22px;
  font-weight: 850;
  line-height: 1.25;
}

.article-nav {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: flex-end;
  gap: 8px 14px;
  min-width: 0;
}

.article-nav a,
.site-footer__links a {
  color: #536159;
  font-size: 14px;
  font-weight: 760;
  text-decoration: none;
}

.article-nav a:hover,
.site-footer__links a:hover {
  color: #123c37;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer {
  display: grid;
  gap: 14px;
  padding: 24px max(20px, calc((100vw - 1180px) / 2)) 30px;
  border-top: 1px solid #dfe5dc;
  background: #fbfbf7;
  color: #69756e;
  font-size: 13px;
  line-height: 1.55;
}

.site-footer__inner {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, max-content));
  align-items: start;
  justify-content: space-between;
  gap: 14px 32px;
  width: 100%;
}

.site-footer__brand,
.site-footer__compliance,
.site-footer__links {
  display: grid;
  gap: 4px;
  min-width: 0;
}

.site-footer__brand {
  color: #7b857f;
}

.site-footer__compliance {
  justify-items: end;
  text-align: right;
}

.site-footer__brand span,
.site-footer__compliance span,
.site-footer__compliance a {
  display: block;
}

.site-footer__compliance a {
  color: inherit;
  text-decoration: none;
}

.site-footer__compliance a:hover {
  color: #123c37;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.site-footer__links {
  padding-top: 14px;
  border-top: 1px solid #e7ece5;
  display: flex;
  flex-wrap: wrap;
  gap: 8px 14px;
}

@media (max-width: 860px) {
  .site-footer__inner {
    grid-template-columns: minmax(0, 1fr);
  }

  .site-footer__compliance {
    justify-items: start;
    text-align: left;
  }
}

@media (max-width: 720px) {
  main {
    padding: 22px 14px 46px;
  }

  .article {
    gap: 22px;
    padding: 0 2px;
  }

  .article-header {
    gap: 14px;
  }

  h1 {
    max-width: none;
    font-size: clamp(24px, 7.2vw, 32px);
    line-height: 1.28;
  }

  h2 {
    font-size: 20px;
  }

  p,
  li,
  dt,
  dd {
    font-size: 15px;
    line-height: 1.82;
  }

  .article-meta {
    display: block;
  }

  .article-meta dd {
    display: inline;
  }

  .article-meta dd::after {
    margin: 0 5px;
  }

  .paper-abstract,
  .paper-keywords {
    padding-left: 0;
  }

  .paper-section--conclusion {
    padding: 18px 0;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  .site-bar {
    align-items: flex-start;
    flex-direction: column;
    min-height: 0;
    padding: 14px 16px;
  }

  .article-nav {
    justify-content: flex-start;
  }

  .site-footer__inner {
    justify-items: center;
    text-align: center;
  }

  .site-footer__brand,
  .site-footer__compliance,
  .site-footer__links {
    justify-items: center;
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 460px) {
  .brand-mark {
    width: 38px;
    height: 38px;
    font-size: 17px;
  }

  .brand-copy strong {
    font-size: 20px;
  }

  .brand-copy .eyebrow {
    font-size: 11px;
  }
}