@charset "UTF-8";
/*重置样式*/
img {
  border: 0;
  vertical-align: middle;
}

ol,
ul {
  list-style: none;
}

a {
  text-decoration: none;
}

.clearfloat:after {
  content: "";
  display: block;
  clear: both;
  visibility: hidden;
  height: 0
}

.clearfloat {
  zoom: 1
}

/*banner图*/

.banner {
  width: 100%;
  height: 505px;
  background: url(/public/images/course/banner-app.jpg) no-repeat center;
}

/*下载列表*/

.down-list {
  margin: 65px auto;
  width: 1200px;
}

.down-list li {
  float: left;
  margin: 0 66px;
  width: 205px;
  text-align: center;
}

.down-list li h2 {
  line-height: 30px;
  font-size: 28px;
  color: #111;
}

.down-list li p {
  margin-top: 5px;
  line-height: 30px;
  font-size: 16px;
  color: #999;
}

.down-style {
  margin-top: 30px;
}

.down-style .down-body {
  overflow: hidden;
}

.down-style span {
  display: block;
  width: 73px;
  margin-left: 65px;
}

.down-style span.macDown {
  margin-right: 0;
}

.down-style .downBtn {
  display: block;
  margin-bottom: 10px;
  width: 73px;
  height: 73px;
  padding: 0;
  border-radius: 10px;
  background: #333;
  color: #fff;
  cursor: pointer;
  position: relative;
}

.down-style .downBtn:hover {
  background: #565656;
}

.down-style .pc .logo {
  display: block;
  width: 23px;
  height: 24px;
  background: url(../images/course/winlogo.png) no-repeat;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-top: -12px;
  margin-left: -12px;
}

.down-style .mac .logo {
  display: block;
  width: 24px;
  height: 30px;
  background: url(../images/course/AppleLogo.png) no-repeat;
  position: absolute;
  left: 50%;
  top: 50%;
  margin-top: -15px;
  margin-left: -12px;
}

.down-list .down-style p {
  line-height: 18px;
  font-size: 14px;
}

.down-style img {
  width: 110px;
  height: 110px;
}

/*非win7及以上系统的弹层提示*/

.detectMacOsMarkLayer {
  display: none;
  width: 465px;
  height: 240px;
  background: #fff;
  border-radius: 2px;
  position: fixed;
  left: 50%;
  top: 50%;
  z-index: 11;
  margin: -120px 0 0 -232px;
}

.detectOsMarkLayer {
  display: none;
  width: 465px;
  height: 240px;
  background: #fff;
  border-radius: 2px;
  position: fixed;
  left: 50%;
  top: 50%;
  z-index: 11;
  margin: -120px 0 0 -232px;
}

.markLayer {
  display: none;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.1);
  position: absolute;
  left: 0;
  top: 0;
  z-index: 10;
}

.d-os-box {
  overflow: hidden;
  width: 100%;
  position: relative;
}

.d-text {
  height: 40px;
  margin: 80px 0 30px 0;
  width: 100%;
  text-align: center;
  color: #666;
}

.button-box {
  text-align: center;
}

.button-box a {
  display: inline-block;
  width: 130px;
  height: 40px;
  line-height: 40px;
  text-align: center;
  border-radius: 2px;
  margin: 0 20px;
}

.button-box a.btn-down {
  border: 1px solid #ccc;
}

.button-box a.btn-cancel {
  background: #f13232;
  color: #fff
}

.close-icon {
  font-size: 30px;
  color: #999;
  width: 23px;
  height: 40px;
  position: absolute;
  right: 10px;
  top: 0px;
  cursor: pointer;
}