h1{
    text-align: center;
    color: #333;
    font-weight: 500;
    font-size: 40px;
}
header span{
    display: block;
    text-align: center;
}
.main{
    width: 913px;
    height: 423px;
    margin: 90px auto 0;
    position: relative;
    background: transparent url('../img/welcome.png') no-repeat;
}
.mark{
    background: transparent url('../img/welcome_pop.png') no-repeat;
    position: absolute;
    width: 42px;
    height: 38px;
}
.mark label{
    background: #3f8fd3;
    background-image: -webkit-gradient(linear,left top,left bottom,from(#3f8fd3),to(#045ebb));
    background-image: -webkit-linear-gradient(top,#3f8fd3,#045ebb);
    background-image: -moz-linear-gradient(top,#3f8fd3,#045ebb);
    background-image: -ms-linear-gradient(top,#3f8fd3,#045ebb);
    background-image: -o-linear-gradient(top,#3f8fd3,#045ebb);
    background-image: linear-gradient(top,#3f8fd3,#045ebb);
    filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#3f8fd3',EndColorStr='#045ebb');
    padding: 10px;
    border-radius: 8px;
    display: none;
    color: #fff;
    padding: 15px;
    font-size: 13px;
    cursor: pointer;
    z-index: 30;
    position: relative;
    box-shadow: 0 0 5px #777;
}
.mark:hover label{
    display: block;
}
.p1{
    top: 14px;
    left: 69px;
}
.l1{
    width: 170px;
    top: -32px;
    left: -26px;
}
.p2{
    top: -14px;
    left: 404px;
}
.l2{
    width: 170px;
    top: -32px;
    left: -80px;
}
.p3{
    top: 15px;
    left: 565px;
}
.l3{
    width: 200px;
    top: -32px;
    left: -192px;
}
.p4{
    top: 15px;
    left: 610px;
}
.l4{
    width: 190px;
    top: -16px;
    left: -2px;
}
.p5{
    top: -30px;
    left: 550px;
}
.l5{
    width: 200px;
    top: -35px;
    left: -26px;
}
.p6{
    top: 20px;
    left: 775px;
}
.l6{
    width: 170px;
    top: -32px;
    left: -112px;
}
.p7{
    top: 334px;
    left: 410px;
}
.l7{
    width: 150px;
    top: -16px;
    left: -24px;
}
.p8{
    top: -30px;
    left: 790px;
}
.l8{
    width: 200px;
    top: -33px;
    left: -24px;
}