guide.css

.guideMask {
    background-color: #000;
    position: absolute;
    width: 100%;
    left: 0px;
    top: 0px;
    opacity: 0;
}
.guideBubble {
    position: absolute;
    width: 250px;
    background-color: #fff;
    padding: 10px;
    border-radius: 5px;
    box-shadow: 0 1px 10px rgba(0,0,0,.4);
}
.guideBubble .intro {
    padding-bottom: 10px;
    margin-left: 20px;
}
.guideBubble .step {
    position: absolute;
    left: 5px;
    text-align: center;
    font-weight: bold;
    top: 8px;
    background-color: #BBB;
    color: #fff;
    width: 20px;
    height: 20px;
    border-radius: 10px;
    line-height: 20px;
}
.guideBubble-arrow {
    border: 5px solid white;
    content:'';
    position: absolute;
}
.guideBubble-arrow.top {
    top: -10px;
    border-top-color:transparent;
    border-right-color:transparent;
    border-bottom-color:white;
    border-left-color:transparent;
}
.guideBubble-arrow.right {
    right: -10px;
    top: 10px;
    border-top-color:transparent;
    border-right-color:transparent;
    border-bottom-color:transparent;
    border-left-color:white;
}
.guideBubble-arrow.bottom {
    bottom: -10px;
    border-top-color:white;
    border-right-color:transparent;
    border-bottom-color:transparent;
    border-left-color:transparent;
}
.guideBubble-arrow.left {
    left: -10px;
    top: 10px;
    border-top-color:transparent;
    border-right-color:white;
    border-bottom-color:transparent;
    border-left-color:transparent;
}