.cloud {
    padding: 20px 0;
    color: #666;
    background: white;
    font-size: 14px;
    line-height: 1.5;
}
.cloud h1, h2, h3, h4, h5, h6 {
    font-weight: normal;
}
.cloud .introduce {
    width: 1000px;
    margin: 0 auto;
}

.cloud .title {
    margin-bottom: 15px;
    font-size: 24px;
    color: #444;
}

.cloud .tDown {
    -webkit-animation: fadeDown 0.8s ease-in-out 0.3s backwards;
    -moz-animation: fadeDown 0.8s ease-in-out 0.3s backwards;
    -o-animation: fadeDown 0.8s ease-in-out 0.3s backwards;
    -ms-animation: fadeDown 0.8s ease-in-out 0.3s backwards;
    animation: fadeDown 0.8s ease-in-out 0.3s backwards;
}

.title_c {
    margin-bottom: 40px;
    text-align: center;
}

.title_bar {
    margin: 0 auto;
    width: 80px;
    height: 3px;
    background: #4ea5ff;
}

.clock{
	cursor: pointer;
}
.clock .bg {
    animation: myfirst 3s infinite linear;
    -moz-animation: myfirst 3s infinite linear;
    -webkit-animation: myfirst 3s infinite linear;
    -o-animation: myfirst 3s infinite linear;
    left: 0;
    top: 0;
    width: 128px;
    height: 128px;
 
    background: url(../images/circle.png) no-repeat;
}

.clock .enter{
	position: relative;
    top: 52px;
    font-size: 18px;
    color: #2a83de;
}