.flex {
    display: box; /* OLD - Android 4.4- */
    display: -webkit-box; /* OLD - iOS 6-, Safari 3.1-6 */
    display: -moz-box; /* OLD - Firefox 19- (buggy but mostly works) */
    display: -ms-flexbox; /* TWEENER - IE 10 */
    display: -webkit-flex; /* NEW - Chrome */
    display: flex; /* NEW, Spec - Opera 12.1, Firefox 20+ */
}
/* 父元素-水平居中（主轴是横向才生效） */
.flex-hc {
    /* 09版 */
    -webkit-box-pack: center;
    /* 12版 */
    -webkit-justify-content: center;
    -moz-justify-content: center;
    -ms-justify-content: center;
    -o-justify-content: center;
    justify-content: center;
}
/* 父元素-竖直居中（主轴是横向才生效） */
.flex-vc {
    /* 09版 */
    -webkit-box-align: center;
    /* 12版 */
    -webkit-align-items: center;
    -moz-align-items: center;
    -ms-align-items: center;
    -o-align-items: center;
    align-items: center;
}

input{
    -webkit-tap-highlight-color: rgba(255, 255, 255, 0);
    -webkit-user-select: none;
    -moz-user-focus: none;
    -moz-user-select: none;
    -webkit-appearance: none;
    outline: none;
    border: none;
   
}
.flex-hc1 {
    /* 09版 */
    -webkit-box-pack: space-between;
    /* 12版 */
    -webkit-justify-content: space-between;
    -moz-justify-content: space-between;
    -ms-justify-content: space-between;
    -o-justify-content: space-between;
    justify-content: space-between;
}