/* CSS Reset*/
body,
div,
span,
object,
iframe,
input,
h1,
h2,
h3,
h4,
h5,
h6,
p,
pre,
a,
acronym,
address,
code,
del,
em,
font,
img,
ins,
strong,
b,
i,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
table,
tbody,
tfoot,
thead,
tr,
th,
td {
    padding: 0;
    margin: 0;
}
table {
    border-collapse: collapse;
    border-spacing: 0;
}
ins {
    text-decoration: none;
}
del {
    text-decoration: line-through;
}
input,
select {
    vertical-align: middle;
}
input,
textarea,
select {
    font: 12px/1.5 "microsoft yahei", Arial, sans-serif;
}
fieldset,
img {
    border: 0;
}
address,
code,
th,
em {
    font-style: normal;
}
ol,
ul {
    list-style: none;
}
h1,
h2,
h3,
h4,
h5,
h6 {
    font-size: 100%;
}
body {
    margin: 0 auto;
    font: 14px/1.5 "microsoft yahei", Arial, sans-serif;
    color: #666;
    background: #fff;
    height: 100%;
}

.wrapper {
    margin: 0 auto;
    width: 1440px;
}
.clearfix {
    zoom: 1;
}
.clearfix:after {
    content: "";
    height: 0;
    visibility: hidden;
    display: block;
    clear: both;
}
.clear {
    clear: both；;
}
a {
    text-decoration: none;
    outline: none;
    cursor: pointer;
}
.fl {
    float: left;
}
.fr {
    float: right;
}

/**************************校园版安装包页面**************************/

.exe-bg {
    background: url(https://ppt.ndhy.com/101ppt_static/activity/2021/schoolvip/img/exe-bg.jpg) no-repeat top center;
    width: 100%;
    min-height: 1080px;
    position: relative;
}
.footer-tip {
    color: #666666;
    font-size: 20px;
    position: absolute;
    width: 100%;
    text-align: center;
    bottom: 50px;
}

.exe-con {
    padding-top: 510px;
}

.pc-down {
    width: 376px;
    height: 102px;
    display: block;
    border-radius: 51px;
    background-color: #ffd66b;
    color: #542200;
    font-size: 14px;
    font-weight: bold;
    margin: 0 auto 18px;
}

.pc-down:hover {
    background-color: #ffef7f;
}

.pc-down img {
    padding: 32px 20px 0 82px;
    float: left;
}

.pc-down h2 {
    font-size: 32px;
    padding-top: 12px;
}

.pc-down span {
    padding-right: 16px;
    padding-left: 2px;
}

.ck-btn {
    font-size: 28px;
    color: #fff;
    text-align: center;
    display: block;
}

.ck-btn::after {
    content: "";
    display: inline-block;
    background: url(https://ppt.ndhy.com/101ppt_static/activity/2021/schoolvip/img/icon-jt.png) no-repeat;
    width: 11px;
    height: 19px;
    margin-left: 10px;
}

.ck-btn:hover {
    color: #b9b9b9;
}

.ck-btn:hover::after {
    content: "";
    background: url(https://ppt.ndhy.com/101ppt_static/activity/2021/schoolvip/img/icon-jt-h.png) no-repeat;
}

@media only screen and (max-width: 1679px) {
    .exe-bg {
        min-height: 1080px;
    }
}

@media only screen and (min-width: 1921px) {
    .exe-bg {
        background-size: cover;
        width: 100%;
        overflow-x: hidden;
        min-height: 100vh;
    }

    .exe-con {
        height: 1080px;
    }

    .pc-down {
        transform: scale(1.2);
        margin: 260px auto 40px;
    }

    .ck-btn {
        transform: scale(1.2);
    }
}

@media only screen and (min-width: 2561px) {
    .pc-down {
        transform: scale(1.9);
        margin: 580px auto 80px;
    }

    .ck-btn {
        transform: scale(1.9);
    }
}

@media only screen and (max-width: 2880px) and (min-width: 2561px) {
    .pc-down {
        transform: scale(1.5);
        margin: 300px auto 60px;
    }
    .ck-btn {
        transform: scale(1.5);
    }
}