html {
    font-size: 62.5%;
}
body {
    margin:0;
    padding:0;
    background-color: rgb(249, 249, 249);
    -webkit-font-smoothing: antialiased;
    font-family: "Microsoft YaHei","宋体","Segoe UI", "Lucida Grande", Helvetica, Arial,sans-serif, FreeSans, Arimo;
    font-size: 1.4rem;
    color: rgb(33, 33, 33);
}
a {
    text-decoration:none;
    font-family:arial,sans-serif;
    font-size:1.6rem;
    line-height:2rem;
}
.demo-block a {
    border-left: 5px solid;
    border-left-color: rgb(178, 235, 242);
    padding-left: 20px;
    color: #00BCD4;
}
.page-header h1 {
    margin: 0;
    background-color: #00BCD4;
    padding: 1.8rem 0 1.8rem 2rem;
    color: #FFF;
    font-size: 3rem;
    font-weight: 300;
    line-height: 1.5;

}
.contents {
    margin: 0 auto;
    max-width: 900px;  
}
.demo-block {
    margin: 0 2rem;
    line-height: 1.5;
}
.demo-block h2 {
    color: rgb(0, 188, 212);
    font-size: 3rem;
    font-weight: 300;
    line-height: 40px;
}
.demo-block.intro p {
    font-size:1.8rem;    
}
.demo-block h3 {
    /* border-left: 5px solid; */
    /* border-left-color: rgb(178, 235, 242); */
    /* padding-left: 20px; */
    color: rgb(0, 188, 212);
    font-size: 2rem;
    font-weight: 300;
    line-height: 40px;
    
}
.demo-block img {
    width: 100%;
    max-width: 688px;
}

.demo-button {
    width: 50px;
    line-height: 25px;
    height: 25px;
    display: inline-block;
    background: #FFA500;
    text-align: center;
    color: #FFF;
    font-size: 1.7rem;
    border-radius: 3px;
    margin: 15px 12px 5px 0;
    cursor: pointer;
}
.demo-button:hover {
    background:#00BCD4;
}
.demo-button.btn-big {
    width:100px;
}
.demo-bar {
    margin: 10px 0;
    width:100%;
    max-width: 690px;
    height:5px;
}
.demo-code {
    background-color: #EBECEA;
    padding: 20px 0 20px 10px;
    max-width: 678px;
    color: #000;
}

.demo-code.short {
    padding: 0.4rem 1.3rem;
    line-height: 1.8;
}
.demo-code .indent {
    padding-left:25px;
    margin: 0;
}

/* fork github*/
#forkongithub a{
    position:relative;
    top: 15px;
    left: 20px;
    padding:5px 40px;

    background:#FFA500;
    color:#fff;
    text-align:center;
    font-weight:bold;
    transition:0.5s;
}
#forkongithub a:hover{
    background:#00BCD4;
    color:#fff;
}
#forkongithub a::before,
#forkongithub a::after {
    content:"";
    width:100%;
    display:block;
    position:absolute;
    top:1px;
    left:0;
    height:1px;
    background:#fff;
}
#forkongithub a::after{
    bottom:1px;
    top:auto;
}
@media screen and (min-width:800px){
    #forkongithub{
        position:absolute;
        display:block;
        top:0;
        right:0;
        width:200px;
        overflow:hidden;
        height:200px;
        z-index:9999;
    }
    #forkongithub a{
        width:200px;
        position:absolute;
        top:60px;
        right:-60px;
        left:0;
        transform:rotate(45deg);
        -webkit-transform:rotate(45deg);
        -ms-transform:rotate(45deg);
        -moz-transform:rotate(45deg);
        -o-transform:rotate(45deg);
        box-shadow:4px 4px 10px rgba(0,0,0,0.5);
    }
}