*{margin:0;padding:0;box-sizing:border-box}
body{background:#f5f7fa;font-family:Arial,sans-serif}
.register-box{width:400px;background:#fff;margin:80px auto;padding:30px;border-radius:10px;box-shadow:0 0 10px rgba(0,0,0,0.1)}
h2{text-align:center;margin-bottom:25px;color:#333}
.input-item{margin-bottom:20px}
.input-item label{display:block;margin-bottom:8px;color:#666}
.input-item input{width:100%;height:40px;padding:0 10px;border:1px solid #ddd;border-radius:5px;font-size:16px}
.register-btn{width:100%;height:45px;background:#667eea;color:#fff;border:none;border-radius:5px;font-size:16px;cursor:pointer}
.register-btn:hover{background:#5a6edb}
.msg{margin-top:15px;text-align:center;font-size:14px}