:root {
  --fg: #1a1a1a;
  --muted: #6b6b6b;
  --rule: #e6e6e6;
  --link: #0451a5;
  --link-hover: #c0392b;
  --bg: #ffffff;
  --tag-bg: #f1f1f0;
  --tag-fg: #1a1a1a;
  --hiring-bg: #fff8ec;
  --hiring-fg: #92400e;
  --role-bg: #eef2ff;
  --role-fg: #3730a3;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: "Charter", "Iowan Old Style", "Source Serif Pro", Georgia, "Times New Roman", serif;
  font-size: 17px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

main {
  max-width: 700px;
  margin: 0 auto;
  padding: 64px 24px 96px;
}

a {
  color: var(--link);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 120ms ease;
}
a:hover { border-bottom-color: currentColor; }

/* Intro */
.intro {
  display: flex;
  align-items: center;
  gap: 24px;
  margin-bottom: 32px;
}
.avatar {
  width: 92px;
  height: 92px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--rule);
}
h1 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, "Helvetica Neue", Helvetica, Arial, sans-serif;
  font-weight: 600;
  font-size: 28px;
  line-height: 1.2;
  margin: 0 0 4px;
  letter-spacing: -0.01em;
}
h1 .zh {
  font-weight: 400;
  color: var(--muted);
  font-size: 22px;
  margin-left: 4px;
}
.role {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 16px;
}
.links {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
}
.links a { color: var(--fg); }

/* Sections */
section { margin-top: 40px; }
h2 {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  font-weight: 600;
  font-size: 18px;
  margin: 0 0 12px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--rule);
  letter-spacing: -0.005em;
}
p { margin: 0 0 14px; }
.note { font-size: 14px; color: var(--muted); margin-bottom: 18px; }

/* Hiring callout */
.callout {
  margin-top: 4px;
  padding: 16px 18px;
  background: var(--hiring-bg);
  border-radius: 8px;
  border-left: 3px solid #d97706;
  font-size: 16px;
  line-height: 1.6;
}
.callout b { color: var(--fg); }

/* Tag pills */
.tag-pill {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  padding: 2px 8px;
  border-radius: 4px;
  vertical-align: 2px;
  margin-right: 6px;
}
.tag-hiring { color: var(--hiring-fg); background: #fde68a; }

.role-tag {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--role-fg);
  background: var(--role-bg);
  padding: 2px 7px;
  border-radius: 3px;
  font-style: normal;
  vertical-align: 1px;
}

.star-badge {
  display: inline-block;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
  font-weight: 700;
  color: #b45309;
  background: #fef3c7;
  padding: 1px 8px;
  border-radius: 4px;
  font-style: normal;
  font-size: 13px;
  border-bottom: none !important;
}
.star-badge:hover { color: #92400e; background: #fde68a; }

/* Publications */
.pub { margin-bottom: 18px; }
.pub-title {
  font-weight: 600;
  color: var(--fg);
  display: inline;
}
.pub-title:hover { color: var(--link); }
.pub-authors {
  font-size: 15px;
  color: var(--fg);
  margin-top: 2px;
}
.pub-venue {
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
  margin-top: 2px;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
}
.pub-venue a { font-style: normal; color: var(--muted); }
.pub-venue a:hover { color: var(--link); }
.pub-note {
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 3px;
  padding-left: 10px;
  border-left: 2px solid var(--rule);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
}

/* Projects */
.proj { margin-bottom: 14px; }
.proj-title { font-weight: 600; color: var(--fg); }
.proj-title:hover { color: var(--link); }
.proj-meta {
  margin-left: 8px;
  font-size: 13px;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
}
.proj-desc {
  font-size: 15px;
  color: var(--fg);
  margin-top: 2px;
}

/* Experience & Education */
.exp {
  display: grid;
  grid-template-columns: 140px 1fr;
  gap: 16px;
  margin-bottom: 14px;
  align-items: baseline;
}
.exp-when {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  color: var(--muted);
  white-space: nowrap;
}
.exp-what { font-size: 16px; }
.exp-note {
  font-size: 14px;
  color: var(--muted);
  font-style: italic;
}

/* Awards */
.awards {
  list-style: none;
  padding: 0;
  margin: 0;
}
.awards li {
  display: grid;
  grid-template-columns: 60px 1fr;
  gap: 16px;
  margin-bottom: 6px;
  font-size: 15px;
}
.awards .year {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  color: var(--muted);
}

/* WeChat inline pill */
.wechat {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 14px;
  background: var(--tag-bg);
  color: var(--tag-fg);
  padding: 1px 8px;
  border-radius: 4px;
}

/* Footer */
footer {
  margin-top: 64px;
  padding-top: 16px;
  border-top: 1px solid var(--rule);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Inter, sans-serif;
}

@media (max-width: 560px) {
  main { padding: 40px 20px 64px; }
  .intro { gap: 16px; }
  .avatar { width: 72px; height: 72px; }
  h1 { font-size: 24px; }
  h1 .zh { font-size: 18px; }
  .exp { grid-template-columns: 1fr; gap: 2px; }
  .exp-when { font-size: 12px; }
  .callout { padding: 14px 16px; font-size: 15px; }
}