body{
background: #98fb98;
color: #000000;
}


h2{
background-color: #006400;
color: #ffffff;
border-style: outset;
font-size: 40px;
}

h3{
background-color: #228b22;
color: #ffffff;
border-style: groove;
font-size: 25px;
}

ul {margin-left: 1em;}
li {list-style-image: url("pai/btn1.png");}
li:hover {list-style-image: url("pai/btn2.png");}
li:active {list-style-image: url("pai/btn3.png");}