/* 移动优先:微信内置浏览器友好 */
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: #f5f6fa;
  color: #333;
  line-height: 1.6;
}
.container { max-width: 480px; margin: 0 auto; padding: 24px 16px; }
h1 { font-size: 28px; color: #1a73e8; }
.tagline { color: #666; margin: 8px 0 24px; }
.card {
  background: #fff; border-radius: 12px; padding: 20px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}
label { display: block; margin: 12px 0 4px; font-size: 14px; color: #555; }
input, textarea {
  width: 100%; padding: 10px 12px; border: 1px solid #ddd;
  border-radius: 8px; font-size: 16px; /* ≥16px 防 iOS 聚焦缩放 */
}
button {
  width: 100%; margin-top: 16px; padding: 12px;
  background: #1a73e8; color: #fff; border: none;
  border-radius: 8px; font-size: 16px; cursor: pointer;
}
button:active { background: #1557b0; }
.status { margin-top: 12px; font-size: 14px; color: #1a73e8; }
.status.error { color: #d93025; }