* {
    -webkit-box-sizing: border-box;
    -moz-box-sizing: border-box;
    box-sizing: border-box;
    padding: 0;
    margin: 0;
    outline: none;
    backface-visibility: hidden;
}
img {
    max-width: 100%;
    vertical-align: top;
}
a {
    cursor: pointer;
    text-decoration: none;
}