:root{
  --max: 920px;
  --bg: #fafafa;
  --card: #ffffff;
  --text: #111;
  --muted: #555;
  --border: #e9e9e9;
  --radius: 18px;
  --shadow: 0 1px 0 rgba(0,0,0,.04);
}

*{ box-sizing:border-box; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }

.container{
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 18px;
}

.header{
  position: sticky;
  top: 0;
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.nav{
  height: 64px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.brand{ font-weight: 750; }
.links a{ margin-left: 16px; color: var(--muted); }

.main{ padding: 26px 0 44px; }

.card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
}

.hero{
  display:grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
}

.title{
  margin: 0 0 8px;
  font-size: 34px;
  line-height: 1.2;
}

.subtitle{
  margin: 0;
  color: var(--muted);
}

.meta{
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}

.avatar{
  width: 180px;
  height: 180px;
  border-radius: 20px;
  border: 1px solid var(--border);
  object-fit: cover;
  background: #fff;
}

.section-title{
  margin: 0 0 10px;
  font-size: 20px;
}

.publist{
  margin: 0;
  padding-left: 18px;
}

.publist li{ margin: 12px 0; }

.pub-title{ font-weight: 650; }
.pub-meta{ color: var(--muted); font-size: 14px; margin-top: 4px; }

.footer{
  border-top: 1px solid var(--border);
  padding: 18px 0;
  color: var(--muted);
  font-size: 14px;
}

@media (min-width: 860px){
  .hero{
    grid-template-columns: 1.6fr .7fr;
  }
}