ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

/* header */
.header {
    width: 100%;
    height: 80px;
    box-shadow: 0px 2px 8px 0px rgba(112, 112, 112, 0.5);
    background: #FFFFFF;
    position: fixed;
    top: 0;
    transition: all .35s ease-in-out;
    z-index: 99;
}

.nav {
    width: 80%;
    margin: 0 auto;
    position: relative;
}

.nav .logo a {
    display: inline-block;
    margin: 20px 0;
}

.nav .logo img {
    width: 41px;
    height: 41px;
    display: inline-block;
    vertical-align: middle;
    margin-right: 20px;
}

.nav .logo span {
    font-size: 28px;
    font-weight: bold;
    color: #1D2344;
    line-height: 41px;
    display: inline-block;
    vertical-align: middle;
}

.nav .button {
    width: 128px;
    height: 35px;
    background: #222848;
    border-radius: 3px;
    cursor: pointer;
    color: #FFFFFF;
    line-height: 35px;
    text-align: center;
    font-weight: bold;
    position: absolute;
    right: 0;
    top: 22.5px;
    box-sizing: border-box;
}

.download {
    width: 100vw;
    height: 100vh;
    position: absolute;
    top: 0;
    display: none;
    z-index: 100;
}

.mask {
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, .4);
    position: absolute;
    top: 0;
}

.modal {
    width: 558px;
    height: 256px;
    background: #FFFFFF;
    border-radius: 10px;
    position: absolute;
    top: 120px;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    padding: 33px 10px;
    box-sizing: border-box;
}

.modal-title {
    font-size: 25px;
    font-weight: bold;
    color: #313131;
    line-height: 29px;
}

.modal-body {
    padding-top: 28px;
    text-align: center;
}

.modal-body ul{
    display: inline-block;
}

.modal-body li {
    float: left;
    margin-right: 95px;
}

.modal-body li:last-child{
    margin-right: 0;
}

.modal-body a {
    display: inline-block;
}

.modal-body img {
    width: 69px;
    height: 69px;
    display: block;
    margin: 0 auto;
}

.modal-body p {
    font-size: 16px;
    color: #4B4B4B;
    line-height: 24px;
    margin: 12px 0 0 0;
}


/* footer */
.footer {
    width: 90%;
    height: auto;
    background: #2C2936;
    text-align: center;
    padding: 20px 5%;
}

.footer p {
    font-size: 14px;
    color: #B2B2B2;
    line-height: 28px;
    margin: 0;
}

.footer a {
    font-size: 14px;
    color: #B2B2B2;
    line-height: 28px;
}

.footer a:hover {
    color: #FFFFFF;
    text-decoration: underline;
}



@media screen and (min-width: 1680px) {
    .nav {
        width: 70%;
    }
}

@media screen and (max-width: 900px) {
    .nav {
        width: 95%;
    }

    .nav .logo img {
        margin-right: 10px;
    }

    .nav .logo span {
        font-size: 22px;
    }

    .nav .button {
        width: 100px;
    }
}

@media screen and (max-width: 600px) {
    .modal {
        width: 90%;
        height: auto;
    }

    .modal-title {
        font-size: 22px;
    }

    .modal-body li{
        margin-right: 10vw;
    }

}