用css和html实现的一个forest logo

<div class="logo">
    <div id="tree"></div>
    <div id="trunk">
        <div id="left-branch"></div>
        <div id="right-bottom-branch"></div>
        <div id="right-top-branch"></div>
    </div>
</div> www.php.cn

* {
    margin:0;
    padding:0;
}
.logo {
    height:300px;
    width:260px;
    margin:150px auto;
    position:relative;
}
#tree {
    border-bottom:300px solid #063;
    border-left:130px solid transparent;
    border-right:130px solid transparent;
    position:absolute;
    left:0;
    top:0;
    height:0;
    width:0;
}
#trunk {
    height:180px;
    width:32px;
    background:#3b543f;
    position:absolute;
    left:109px;
    bottom:-60px;
}
#left-branch {
    background:#3b543f;
    height:70px;
    width:10px;
    position:absolute;
    left:-18px;
    top:15px;
    transform:rotate(-40deg);
    -webkit-transform:rotate(-40deg);
    -moz-transform:rotate(-40deg);
    -o-transform:rotate(-40deg);
    -ms-transform:rotate(-40deg);
}
#right-bottom-branch {
    background:#3b543f;
    height:100px;
    width:10px;
    position:absolute;
    top:20px;
    left:50px;
    transform:rotate(40deg);
    -webkit-transform:rotate(40deg);
    -moz-transform:rotate(40deg);
    -o-transform:rotate(40deg);
    -ms-transform:rotate(40deg);
}
#right-top-branch {
    background:#3b543f;
    height:50px;
    width:10px;
    position:absolute;
    left:40px;
    top:0px;
    transform:rotate(40deg);
    -webkit-transform:rotate(40deg);
    -moz-transform:rotate(40deg);
    -o-transform:rotate(40deg);
    -ms-transform:rotate(40deg);
}