How to clear default styles and set common styles in CSS

*{
    margin:0;
    padding:0
}
li{
    list-style:none
}
img{
    vertical-align:top;
    border:none
}

body,
button, input, select, textarea /* for ie */ {
    font: 14px/1.5 tahoma, \5b8b\4f53, sans-serif;
}
h1, h2, h3, h4, h5, h6 { font-size: 100%; font-weight: normal;}
address, cite, dfn, em, var { font-style: normal; } /* Make italics straight*/
code, kbd, pre, samp { font-family: courier new, courier, monospace; } /* Unified monospace font */
small { font-size: 12px; } /* Chinese characters smaller than 12px are hard to read, normalize small*/
/** Reset list elements **/
ul, ol { list-style: none; }
/** Reset text formatting elements **/
a { text-decoration: none; }
a:hover { text-decoration: underline; }
sup { vertical-align: text-top; } /* Reset, reduce the impact on line height*/
sub { vertical-align: text-bottom; }
/** Reset form elements **/
legend { color: #000; } /* for ie6 */
fieldset, img { border: 0; } /* img hitchhiking: make the img in the link borderless*/
button, input, select, textarea { font-size: 100%; } /* Make the form elements inherit the font size in IE*/
/* Note: optgroup cannot be corrected*/
/* Reset HTML5 element */
article, aside, details, figcaption, figure, footer,header, hgroup, menu, nav, section,
summary, time, mark, audio, video {
    display: block;
    margin: 0;
    padding: 0;
}
mark { background: #ff0; }
/* Set the default style of the placeholder */
:-moz-placeholder {
    color: #ddd;
    opacity: 1;
}
::-moz-placeholder {
    color: #ddd;
    opacity: 1;
}
input:-ms-input-placeholder {
    color: #ddd;
    opacity: 1;
}
input::-webkit-input-placeholder {
    color: #ddd;
    opacity: 1;
}

select {
    border: none;
    appearance:none;
    -moz-appearance:none;
    -webkit-appearance:none;
    /*Display a small arrow image in the middle of the rightmost selection box*/
    background: url("upload/2022/web/arrow.png") no-repeat scroll right center transparent;
    padding-right: 14px;
}

table {
border-collapse: collapse;
border-spacing: 0;
}

hr {
    border: none;
    height: 1px;
}

ul, ol, { 
  margin: 0;
  padding: 0;
  list-style: n;
}

.button{
    border:0;
    background-color:none
    outline:none;
    -webkit-appearance: none; // Used to remove native styles under IOS}

a{
    text-decoration:none;
    color:#333;
}

input{
    border: none;
    appearance:none;
    -moz-appearance:none;
    outline:none; //The default border does not appear when the input tag is focused:
    -webkit-appearance: none; // Used to remove native styles under IOS}
//or:
input:focus{ outline:none; }//The default border does not appear when the input tag is focused:
border: none; appearance:none; -moz-appearance:none; outline:none; //The default border does not appear when the input tag is focused: -webkit-appearance: no