header {
    width: 1200px;
    margin: 0 auto;
}

main {
    width: 100%;
    height: 500px;
    background: linear-gradient(#1bd8c8, #03828b);
    margin-top: 20px;
    padding: 15px 0px;
}

.mc {
    width: 1200px;
    margin: 0 auto;
}

.m-box {
    width: 440px;
    height: 470px;
    padding: 40px 60px;
    background-color: #fff;
    float: right;
}

.l-title {
    padding: 0px 10px;
    font-size: 16px;
    color: #7BA7AB;
    height: 40px;
    line-height: 40px;
    font-weight: 600;
    border-bottom: 2px solid #7BA7AB;
}

.username,
.mima {
    width: 100%;
    height: 44px;
    border: 1px solid #cacaca;
    padding: 0px 10px;
    margin-top: 30px;
}

.username {
    margin-top: 50px;
}

input:focus {
    border: 1px solid #7BA7AB;
    box-shadow: 0 0 4px #65c8cf;
}

.btn {
    font-size: 18px;
    color: #F9F0DA;
    font-weight: 600;
    padding: 15px 40px;
    background-color: #7BA7AB;
    text-align: center;
    letter-spacing: 3px;
    line-height: 20px;
    border-radius: 40px;
    margin-top: 50px;
}
.zhuce_tip{
    margin: 30px auto;
    text-align: center;
}
.zhuce_tip a{
    color: rgb(0,94,220);
}

.foot {
    height: 80px;
    line-height: 80px;
    color: #8b8b8b;
    text-align: center;
    border-top: 1px solid #ccc;
}

@media screen and (max-width: 991px) {
    header {
        width: 100%;
    }

    main {
        padding-top: 50px;
    }

    .mc {
        width: 100%;
    }

    .m-box {
        width: 320px;
        margin: 0 auto;
        float: unset;
        padding: 30px 30px;
        height: 340px;
    }

    .l-title {
        font-size: 14px;
        padding: 0 5px;
        line-height: 35px;
        height: 35px;
    }

    .m-box input {
        height: 35px;
        line-height: 35px;
        font-size: 12px;
    }

    .username {
        margin-top: 40px;
    }

    .mima {
        margin-top: 25px;
    }

    .btn {
        font-size: 14px;
        width: 120px;
        height: 40px;
        line-height: 40px;
        padding: 0;
        margin: 30px auto 0;
    }
}