html,body{
    }

    .gototop {
        display: none;
        -webkit-animation: hide 350ms ease-out forwards 1;
        animation: hide 350ms ease-out forwards 1;
        padding: 16px 32px;
        border: 0;
        text-align: center;
        background-color: #D5D6E2;
        color: #494A5F;
        position: fixed;
        bottom: 16px;
        right: 16px;
        -webkit-transition: background-color 100ms ease-in-out;
        transition: background-color 100ms ease-in-out;
        background: url(../img/top1.png) center no-repeat
    }

    .gototop > span {
        display: inline-block;
        -webkit-transition: transform 100ms 100ms ease-in-out;
        transition: transform 100ms 100ms ease-in-out;
    }

    .gototop:hover,
    .gototop:focus {
        background-color: #D5D6E2;
    }

        .gototop:hover > span,
        .gototop:focus > span {
            -webkit-transform: translateY(-2px);
            transform: translateY(-2px);
        }

.isvisible {
    -webkit-animation: show 1s ease-out forwards 1;
    animation: show 1s ease-out forwards 1;
}

.gototop {
    display: block;
    animation: 350ms ease-out forwards 1;
    outline: none;
    cursor: pointer;
    width: 130px;
    padding: 0px;
    bottom: CALC(50% - 210PX);
    border-radius: 65px 65px 0 0;
}

    .gototop .title {
        color: #305d7c;
        font-size: 16px;
        float: left;
        text-align: center;
        width: calc(100% - 60px);
        padding: 45px 30px 15PX 30PX;
        border-bottom: 1px solid #c8e0f2;
    }

    .gototop .erweima {
        margin-top: 15px;
        float: left;
        width: 100%;
        margin-bottom: 15px;
        border-bottom: 1px solid #c8e0f2;
        color: black
    }

        .gototop .erweima .xiazaibtn {
            width: 100px;
            color: white;
            background-color:;
            background-image: linear-gradient(#65beea, #169adb,#65beea);
            border-radius: 10px;
            padding: 6px 12px;
            font-size: 12px;
            font-weight: bold;
            cursor: pointer
        }

    .gototop .top_text {
        line-height: 40px;
        padding-bottom: 20px;
        color: #0468b6;
        font-weight: bold
    }