html {
    height: 100%;
}

body {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100%;
    background: url(../img/forget-bg.png) no-repeat;
    background-size: 100% 100%;
}

.forget-input-box {
    width: 1647px;
    height: 745px;
    padding: 69px 564px;
}

.forget-input-box h3 {
    text-align: center;
    font-weight: bold;
    font-size: 30px;
    color: #917BE9;
}

.forget-input-box input {
    display: block;
    width: 100%;
    height: 75px;
    margin-top: 50px;
    background: none;
    border-bottom: 2px solid #282727;
    font-size: 16px;
}

.forget-input-box input.custom-placeholder {
    border-bottom: 2px solid #8165F0;

}

.forget-input-box input.custom-placeholder::placeholder {
    color: #8165F0;
    /* 改变placeholder文本颜色为红色 */
}

.forget-input-box button {
    width: 100%;
    height: 79px;
    cursor: pointer;
    margin-top: 80px;
    background: #8165F0;
    border-radius: 4px;
    border: none;
    font-weight: 400;
    font-size: 20px;
    color: #FFFFFF;
}