* {
    margin: 0;
    padding: 0;
}
body,
html {
    margin-top: 5px;
    font-size: 15px;
    font-family: 'Microsoft Yahei', '微软雅黑', 'Simsun', '宋体', 'Arial', sans-serif;
}
img {
    border: 0;
}
a {
    color: black;
    text-decoration: none;
    outline: none;
}
ol,
ul,
li {
    list-style: none;
    float: left;
}
.head-nav {
    width: 100%;
    height: 80px;
    background: #fff;
}
.head-nav-con {
    width: 1200px;
    height: 80px;
    margin: auto;
    margin-left: 5%;
    position: relative;
}
.head-nav-con ul li {
    width: 170px;
    float: left;
    font-size: 18px;
    text-align: center;
}

.head-nav-con ul a {
    display: block;
    text-decoration: none;
    text-align: center;
    line-height: 80px;
    color: black;
}
.dynamic {
    background: #fff;
}
.drop-down-content li a:hover {
    background: #ff9c01;
    opacity: 8;
}

.clearFloat li ul {
    position: absolute;
    display: none;
    width: 170px;

}
.drop-down-content
{
    background-color: #fff;
}
.drop-down-content-2
{
    background-color: #fff;
}
.clearFloat li:hover .drop-down-content {
    display: block;
}

.clearFloat .drop-down-content-2{
    position: absolute;
    display: none;
    width: 170px;
    left: 170px;
    /* 使nav3元素上移30px */
    margin-top: -80px;
}
.drop-down-content li:hover .drop-down-content-2{
    display: block;
}



.indexlogo {
    margin-top: 10px;
    margin-left: -50px;
    width:100px;
    height: 50px;
    position: absolute;
    left: 0;
}
.clearFloat {
  display: flex;
  justify-content: center;
  padding: 0;

}
.dynamic {
    background: #fff;
    border-radius: 50px;
    margin-left: 200px;

  }
.drop-down {
    list-style: none;
    display: inline-block;

    cursor: pointer;
    position: relative;
    z-index: 2;
    transition: color 0.5s;
  }
.drop-down::after {
    content: '';
    background: #ff9c01;;
    width: 100%;
    height: 100%;
    position: absolute;
    top: 10%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: -1;
    opacity: 0;
    transition: top 0.1s,opacity 0.1s;
  }
.drop-down:hover{
    color: #fff;
  }
.drop-down:hover::after{
    top: 50%;
    opacity: 1;
  }


.bigfont {
    font-size: 13px;
}




.about-pic {
    width: 100%;
    height: auto;
    /* background: url(images/about.png) no-repeat center center; */
    background-size: cover;
    margin-top: 10px;
}
.introduce {
    position: relative;

}
.about-text {
    position: absolute;
    top:20px;
    left: 50%;
    z-index: 1;
    font-size: 24px;
    margin-top: 10%;
}

#content {
    opacity: 0;
    animation: fadeIn 3s forwards;

}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}
.about-text h2{
    word-wrap: break-word;
    
}
.text-introduce {
    text-indent: 2em;
    margin-top: 20px;
    margin-left:20px ;
    margin-right: 50px;
    font-size: 20px;
}

.bottom{

    background-color: #ff9c01;
    padding: 30px;
    display: flex;
    border-radius: 50px;
}
.bottom-nav {
font-size: 10px;
}
.email {
    display: flex;
    margin-left: 50%;
    margin-top: 30px;
}
.email-pic{
    width: 50px;
    height: auto;
    margin-right: 10px;
}