body {
  font-size: 0.16rem;
}
body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
form,
fieldset,
input,
textarea,
p,
blockquote,
th,
td {
  margin: 0;
  padding: 0;
  font-family: 'pingfang SC', 'webfont', 'helvetica neue', arial, 'hiragino sans gb', 'microsoft yahei ui', 'microsoft yahei', simsun, sans-serif !important;
}
table {
  margin: 0;
  padding: 0;
  border-collapse: collapse;
  border-spacing: 0;
}
textarea {
  resize: none;
}
li {
  list-style: none;
}
fieldset,
img {
  border: 0;
}
img {
  vertical-align: top;
}
address,
caption,
cite,
code,
dfn,
th,
var {
  font-weight: normal;
  font-style: normal;
}
ol,
ul {
  list-style: none;
}
h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: normal;
  font-size: 100%;
}
abbr,
acronym {
  border: 0;
}
em,
i {
  font-style: normal;
}
a {
  color: #000;
  text-decoration: none;
}
.content {
  position: relative;
}
.navigation-top-box {
  height: 0.5rem;
  width: 100%;
  background-color: #35BA6E;
}
.navigation-top-box .navigation-top {
  position: fixed;
  top: 0;
  left: 0;
  height: 0.5rem;
  width: 100%;
  background-color: #35BA6E;
  display: flex;
  justify-content: center;
  align-items: center;
  color: #fff;
  z-index: 99;
}
.option-box {
  display: flex;
  height: 0.5rem;
  justify-content: space-around;
  color: #333;
  border-bottom: 0.01rem solid #E5E5E5;
}
.option-box li {
  height: 100%;
  line-height: 0.5rem;
}
.option-box .active {
  color: #FF8142;
  border-bottom: 0.02rem solid #FF8142;
}
.videobox {
  position: relative;
}
.videobox li {
  position: relative;
  margin-bottom: 15px;
}
.videobox video {
  width: 100%;
  height: auto;
  display: block;
}
.btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  cursor: pointer;
  z-index: 2;
  background: rgba(0,0,0,0.5);
  border-radius: 50%;
  width: 50px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.btn i {
  color: #fff;
  font-size: 24px;
}
/* 当视频播放时隐藏播放按钮 */
video:playing + .btn {
  display: none;
}
.videoactive {
  display: none;
}
.mask {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100vh;
  background-color: rgba(0, 0, 0, 0.8);
}
.mask .play {
  position: absolute;
  top: 1.5rem;
  left: 50%;
  margin-left: -1.5rem;
  width: 3rem;
  background-color: #fff;
}
.tab {
  position: fixed;
  bottom: 0;
  width: 100%;
  height: 0.56rem;
  background-color: #fff;
  display: flex;
  justify-content: space-around;
  align-items: center;
  color: #A8AFB5;
  z-index: 9999;
}
.tab .tab-box {
  text-align: center;
}
.tab .tab-box i {
  font-size: 0.27rem;
}
.tab .tab-box h3 {
  margin-top: 0.02rem;
  font-size: 0.12rem;
}
.tabactive {
  color: #35BA6E;
}
.navigation-top {
    position: relative;
    height: 44px;
    line-height: 44px;
    text-align: center;
    font-size: 17px;
    color: #333;
    border-bottom: 1px solid #eee;
}
.navigation-top .icon-zuojiantou {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    color: #333;
    cursor: pointer;
}
/* 添加点击效果 */
.navigation-top .icon-zuojiantou:active {
    opacity: 0.7;
}