/**
 * Ming Ye, Zhou's Reset CSS v2.0 
 * Determine on 2019.6.22 23:00
 */

html,
body,
div,
span,
applet,
object,
iframe,
h1,
h2,
h3,
h4,
h5,
h6,
p,
blockquote,
pre,
a,
abbr,
acronym,
address,
big,
cite,
code,
del,
dfn,
em,
img,
ins,
kbd,
q,
s,
samp,
small,
strike,
strong,
sub,
sup,
tt,
var,
b,
u,
i,
center,
dl,
dt,
dd,
ol,
ul,
li,
fieldset,
form,
label,
legend,
table,
caption,
tbody,
tfoot,
thead,
tr,
th,
td,
article,
aside,
canvas,
details,
embed,
figure,
figcaption,
footer,
header,
hgroup,
menu,
nav,
output,
ruby,
section,
summary,
time,
mark,
audio,
video {
    margin: 0;
    padding: 0;
    border: 0;
    font: inherit;
    font-size: inherit;
    font-weight: normal;
    vertical-align: baseline;
}

/* HTML5 display-role reset for older browsers */
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    display: block;
}

ol,
ul,
li {
    list-style: none;
}

blockquote,
q {
    quotes: none;
}

blockquote:before,
blockquote:after,
q:before,
q:after {
    content: "";
    content: none;
}

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

p {
    word-wrap: break-word;
    /* 允许长单词换行到下一行 */
    word-break: break-all;
    /* 允许在单词内换行 */
}

/* custom */

* {
    box-sizing: border-box;
    -webkit-backface-visibility: hidden;
    /* transition: all 0.2s linear; */
    /* 旋转元素,背面不可见 */
}

html,
body {
    width: 100%;
    font-size: 14px;
    /* line-height: 2.2em; */
    color: #464646;
    font-family: "Arial", "Microsoft YaHei", "黑体", "宋体", "微软雅黑", sans-serif;
}

html {
    overflow-y: scroll;
}

body {
    -webkit-text-size-adjust: none;
    /* chrome可以设置比12px更小的字体 */
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
    /* ios定义默认点击背景色 -> 仅限移动端 */
}

button,
input,
textarea,
select {
    padding: 0;
    outline: none;
    -webkit-appearance: none;
    word-wrap: break-word;
    /* 允许长单词换行到下一行 */
    word-break: break-all;
    /* 允许在单词内换行 */
    vertical-align: middle;
    font-size: 100%;
    font-family: "Arial", "Microsoft YaHei", "黑体", "宋体", "微软雅黑", sans-serif;
}

textarea {
    resize: none;
    /* 去除缩放按钮 */
}

img {
    border: 0;
    vertical-align: middle;
    /* transition: all 0.2s linear; */
}

a {
    color: #464646;
    text-decoration: none;
    transition: color 0.2s linear;
}

a:hover,
a:active,
a:focus {
    color: #2087c5;
    text-decoration: none;
}

/* scrollbar */
::-webkit-scrollbar {
    width: 5px;
    height: 5px;
}

::-webkit-scrollbar-track-piece {
    background-color: rgba(0, 0, 0, 0.2);
    -webkit-border-radius: 6px;
}

::-webkit-scrollbar-thumb:vertical {
    height: 5px;
    background-color: #a5a5a5;
    -webkit-border-radius: 6px;
}

::-webkit-scrollbar-thumb:vertical:hover {
    background-color: #2087c5;
}

::-webkit-scrollbar-thumb:horizontal {
    width: 5px;
    background-color: #a5a5a5;
    -webkit-border-radius: 6px;
}

/* clear */

.clearfix::before,
.clearfix::after {
    clear: both;
    content: "";
    display: block;
    margin: 0;
    padding: 0;
    font-size: 0;
    height: 0;
    line-height: 0;
    visibility: hidden;
}

.clearfix {
    *zoom: 1;
}

/* Flexible Box */

.box {
    display: box;
    display: -webkit-box;
    display: -moz-box;
    display: -ms-flexbox;
    display: -webkit-flex;
    display: flex;
}

/* flex换行 */

.flex_wrap {
    flex-wrap: wrap;
}

/* flex主轴对齐 */

.justify_center {
    justify-content: center;
}

.justify_around {
    justify-content: space-around;
}

.justify_between {
    justify-content: space-between;
}

/* flex侧轴对齐 */

.items_center {
    align-items: center;
}