.captcha-box{background:#fafafa;border:1px solid #e9ecef;border-radius:12px;padding:14px}
.captcha-grid{display:flex;gap:10px;flex-wrap:wrap;margin-top:8px}
.captcha-btn{display:flex;align-items:center;justify-content:center;height:44px;width:56px;border:1px solid #e0e0e0;border-radius:10px;background:#fff;font-size:26px;line-height:1;cursor:pointer;user-select:none}