111網頁前端設計工程師培訓班
複選驗證：
https://www.notion.so/ugm-share/checkbox-valid-b361e7ecf06246bbad8b879aeda7bbd1
<style> input:invalid, select:invalid, textarea:invalid { border-color: #dc3545; } input:focus:invalid, select:focus:invalid, textarea:focus:invalid { outline: none; color: #212529; background-color: #fff; border-color: #eb0909; box-shadow: 0 0 0 0.25rem rgba(162, 15, 15, 0.25); } </style>