ai {
  display: block;
  font-family: 'Segoe UI', system-ui, sans-serif;
  color: #000000;
  line-height: 1.5;
  padding: 10px;
  background: #f0f0f0;
  border-radius: 8px;
  border: 2px solid #333;
}

hd {
  display: block;
  font-weight: bold;
  text-align: center;
  border-bottom: 2px solid #c90e0e;
  padding-bottom: 5px;
  margin-bottom: 10px;
  font-size: 1.1em;
}

article {
  margin-bottom: 15px;
  text-align: justify;
}

details {
  background: #e6e6e6;
  padding: 10px;
  border-radius: 5px;
  border: 1px solid #ccc;
}

summary {
  font-weight: bold;
  cursor: pointer;
  color: #c90e0e;
}

p[t] {
  margin: 10px 0;
  padding: 8px;
  background: #ffffff;
  border-left: 4px solid #c90e0e;
}

f {
  font-weight: 800;
  font-size: 1.2em;
  display: block;
  margin-bottom: 5px;
}

d {
  display: block;
  font-size: 0.9em;
  padding: 2px 0;
}

/* 移动端优化 */
@media (max-width: 600px) {
  ai { padding: 5px; font-size: 14px; }
  p[t] { padding: 5px; }
}