日常小知识(移动端)

::-webkit-input-placeholder { /* WebKit browsers */
    color: #a7a7a7;
}

:-moz-placeholder { /* Mozilla Firefox 4 to 18 */
    color: #a7a7a7;
}

:-moz-placeholder { /* Mozilla Firefox 19+ */
    color: #a7a7a7;
}

:-ms-input-placeholder { /* Internet Explorer 10+ */
    color: #a7a7a7;
}

input[type=button],
input[type=submit] {
  -webkit-appearance: none;
  outline: none;
} 

-webkit-overflow-scrolling: touch;