:root {
  --ink: #173532;
  --ink-soft: #4d6662;
  --paper: #fffdf8;
  --mint: #dff3eb;
  --teal: #247f73;
  --teal-dark: #12554e;
  --yellow: #ffd65c;
  --coral: #d86b5f;
  --line: #cbded8;
  --max: 1120px;
  --radius: 18px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  line-height: 1.75;
}

a { color: inherit; }

.shell {
  width: min(var(--max), calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  z-index: 10;
  top: 0;
  border-bottom: 1px solid rgba(203, 222, 216, .9);
  background: rgba(255, 253, 248, .92);
  backdrop-filter: blur(14px);
}

.nav {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 900;
  text-decoration: none;
}

.brand img {
  width: 42px;
  height: 42px;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
}

.nav-links a { text-decoration: none; }
.nav-links a:hover { color: var(--teal); }

.hero {
  overflow: hidden;
  padding: 86px 0 76px;
  background:
    radial-gradient(circle at 88% 18%, rgba(255, 214, 92, .72) 0 11%, transparent 12%),
    linear-gradient(135deg, #e9f7f2 0%, #fffdf8 62%);
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--coral);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.hero h1,
.article-hero h1 {
  max-width: 870px;
  margin: 0;
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: clamp(42px, 7vw, 76px);
  line-height: 1.16;
}

.hero p:last-child {
  max-width: 680px;
  margin: 26px 0 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 56px 0 80px;
}

.article-card {
  min-height: 310px;
  display: flex;
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: 0 18px 50px rgba(23, 53, 50, .06);
}

.article-card:nth-child(1) { border-top: 5px solid var(--coral); }
.article-card:nth-child(2) { border-top: 5px solid var(--teal); }
.article-card:nth-child(3) { border-top: 5px solid var(--yellow); }
.article-card:nth-child(4) { border-top: 5px solid #8fbeb2; }

.article-meta {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  margin-bottom: 26px;
  color: var(--ink-soft);
  font-size: 12px;
  font-weight: 800;
}

.article-card h2 {
  margin: 0;
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: 29px;
  line-height: 1.42;
}

.article-card p {
  margin: 16px 0 24px;
  color: var(--ink-soft);
}

.read-link {
  width: fit-content;
  margin-top: auto;
  color: var(--teal-dark);
  font-weight: 900;
  text-decoration: none;
}

.read-link:hover { text-decoration: underline; text-underline-offset: 5px; }

.article-hero {
  padding: 72px 0 50px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(135deg, #e9f7f2 0%, #fffdf8 70%);
}

.breadcrumbs {
  margin-bottom: 24px;
  color: var(--teal-dark);
  font-size: 14px;
  font-weight: 800;
}

.breadcrumbs a { text-decoration: none; }

.article-hero h1 {
  max-width: 900px;
  font-size: clamp(40px, 6vw, 66px);
}

.article-deck {
  max-width: 760px;
  margin: 24px 0 0;
  color: var(--ink-soft);
  font-size: 19px;
}

.article-byline {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 28px;
  color: var(--ink-soft);
  font-size: 13px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 760px) minmax(220px, 1fr);
  gap: 74px;
  align-items: start;
  padding: 62px 0 84px;
}

.article-body {
  font-size: 17px;
}

.article-body > p:first-child {
  font-size: 21px;
  line-height: 1.8;
}

.article-body h2 {
  margin: 52px 0 18px;
  font-family: "Songti SC", "STSong", SimSun, serif;
  font-size: 32px;
  line-height: 1.35;
}

.article-body h3 {
  margin: 32px 0 12px;
  font-size: 21px;
}

.article-body p { margin: 0 0 20px; }

.article-body ul,
.article-body ol {
  margin: 0 0 24px;
  padding-left: 24px;
}

.article-body li + li { margin-top: 10px; }

.callout {
  margin: 30px 0;
  padding: 24px 26px;
  border-left: 5px solid var(--coral);
  border-radius: 0 var(--radius) var(--radius) 0;
  background: #fff2ee;
}

.callout strong { color: #8a3d34; }

.takeaway {
  margin: 34px 0;
  padding: 28px;
  border: 1px solid #a9cec5;
  border-radius: var(--radius);
  background: var(--mint);
}

.takeaway h2 { margin-top: 0; }

.article-aside {
  position: sticky;
  top: 104px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.article-aside h2 {
  margin: 0 0 12px;
  font-size: 18px;
}

.article-aside p {
  margin: 0 0 18px;
  color: var(--ink-soft);
  font-size: 14px;
}

.article-aside a {
  display: inline-flex;
  color: var(--teal-dark);
  font-weight: 900;
  text-decoration: none;
}

.article-aside a + a { margin-top: 12px; }

.medical-note {
  margin-top: 54px;
  padding-top: 24px;
  border-top: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 14px;
}

.footer {
  padding: 36px 0;
  color: #c9d8d5;
  background: #173532;
  font-size: 13px;
}

.footer-row {
  display: flex;
  justify-content: space-between;
  gap: 28px;
}

.footer a { color: var(--yellow); }

@media (max-width: 820px) {
  .article-grid,
  .article-layout { grid-template-columns: 1fr; }
  .article-layout { gap: 36px; }
  .article-aside { position: static; }
  .nav-links a:not(:last-child) { display: none; }
  .footer-row { flex-direction: column; }
}

@media (max-width: 560px) {
  .shell { width: min(var(--max), calc(100% - 30px)); }
  .hero, .article-hero { padding-top: 56px; padding-bottom: 44px; }
  .article-card { min-height: auto; padding: 24px; }
  .article-body { font-size: 16px; }
  .article-body > p:first-child { font-size: 19px; }
  .article-body h2 { font-size: 27px; }
}