* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  background: #f8f9fa;
  color: #333;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 2rem;
}

.avatar {
  width: 96px;
  height: 96px;
  margin: 0 auto 1.5rem;
  border-radius: 50%;
  background: #4a90d9;
  color: #fff;
  font-size: 2.5rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
}

h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.tagline {
  color: #666;
  font-size: 1.05rem;
  margin-bottom: 1.5rem;
}

.links {
  font-size: 1rem;
}

.links a {
  color: #4a90d9;
  text-decoration: none;
  transition: opacity 0.2s;
}

.links a:hover {
  opacity: 0.7;
}

.sep {
  margin: 0 0.75rem;
  color: #ccc;
}

footer {
  padding: 1.5rem;
  text-align: center;
  font-size: 0.8rem;
}

footer a {
  color: #999;
  text-decoration: none;
}

footer a:hover {
  color: #666;
}

@media (prefers-color-scheme: dark) {
  body { background: #1a1a2e; color: #e0e0e0; }
  .tagline { color: #aaa; }
  .sep { color: #555; }
  footer a { color: #777; }
  footer a:hover { color: #aaa; }
}