* { box-sizing: border-box; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f7f5f2;
  color: #1a1a1a;
  margin: 0;
}
.page {
  max-width: 480px;
  margin: 0 auto;
  padding: 24px 16px 60px;
}
h1 { font-size: 22px; margin: 12px 0 4px; }
.sub { color: #666; margin-bottom: 24px; }
.back { color: #888; text-decoration: none; font-size: 14px; }
.concept-list { list-style: none; padding: 0; }
.concept-list li { margin: 12px 0; }
.concept-list a {
  display: block;
  padding: 16px;
  background: #fff;
  border-radius: 12px;
  text-decoration: none;
  color: #1a1a1a;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.search {
  display: flex;
  gap: 8px;
  margin: 16px 0;
}
.search input {
  flex: 1;
  padding: 10px 12px;
  border: 1px solid #ddd;
  border-radius: 8px;
  font-size: 15px;
}
.search button {
  padding: 10px 14px;
  border: none;
  border-radius: 8px;
  background: #1a1a1a;
  color: #fff;
  font-size: 14px;
}
.card {
  background: #fff;
  border-radius: 16px;
  padding: 20px;
  margin: 12px 0;
  box-shadow: 0 1px 3px rgba(0,0,0,.06);
}
.card h2 { font-size: 16px; margin: 0 0 8px; }
.stock-header-big { display: flex; justify-content: space-between; align-items: baseline; margin: 8px 0 4px; }
.stock-header-big .stock-name { font-size: 24px; font-weight: 700; }
.stock-code { color: #999; font-size: 13px; }
.stock-metric { font-size: 28px; font-weight: 700; margin: 12px 0; }
.analogy { line-height: 1.6; margin: 8px 0; color: #333; }
.data-source { font-size: 12px; color: #999; margin-top: 8px; }
.quick-picks { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 20px; }
.chip {
  padding: 6px 12px;
  border: 1px solid #ddd;
  border-radius: 999px;
  background: #fff;
  font-size: 13px;
  color: #333;
}