.contact-form{max-width:400px;margin:50px auto;padding:20px}.form-group{margin-bottom:15px}.form-input{width:100%;padding:12px;border:1px solid #ddd;-webkit-border-radius:4px;border-radius:4px;font-size:16px}.submit-btn{width:100%;background:#4caf50;color:#fff;padding:12px;border:none;-webkit-border-radius:4px;border-radius:4px;font-size:16px;cursor:pointer}.captcha-popup{display:none;position:fixed;top:0;left:0;width:100%;height:100%;background:rgba(0,0,0,0.7);z-index:1000}.captcha-popup.show{display:-webkit-box;display:-webkit-flex;display:-ms-flexbox;display:flex;-webkit-box-align:center;-webkit-align-items:center;-ms-flex-align:center;align-items:center;-webkit-box-pack:center;-webkit-justify-content:center;-ms-flex-pack:center;justify-content:center}.captcha-modal{background:#fff;padding:30px;-webkit-border-radius:10px;border-radius:10px;-webkit-box-shadow:0 10px 30px rgba(0,0,0,0.3);box-shadow:0 10px 30px rgba(0,0,0,0.3);max-width:400px;width:90%;text-align:center}.captcha-close{float:right;font-size:24px;cursor:pointer;color:#999}.captcha-close:hover{color:#f44336}.captcha-title{margin-bottom:20px;color:#333}.captcha-popup__button{padding:8px 16px;background:#999;color:#fff;border:none;-webkit-border-radius:4px;border-radius:4px;cursor:pointer}