div,
p,
ul,
li,
a,
img,
span,
h1,
h2,
h3,
h4,
h5,
h6,
header,
footer,
section,
article,
form,
input,
button,
textarea,
video,
iframe,
button {
    margin: 0;
    padding: 0; 
    /* ios点击时避免出现黑底 */
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body,
html {
    margin: 0;
    padding: 0;
    user-select: none;
    font-family: PingFangSC-Regular;
}

button {
    outline: none;
    border: none;
}

input,
textarea,
div {
    outline: none;
    border-style: none; 
    /* 不加下面这句ios focus会有阴影 */
    -webkit-appearance: none;
}

input::-webkit-search-cancel-button {
    display: none;
}

a {
    color: #212121;
    text-decoration: none;
}

ul,
li {
    list-style: none;
}