html {
    background: white;
    color: black;
}

body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
code,
form,
fieldset,
legend,
input,
textarea,
p,
blockquote,
th,
td,
hr,
button,
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body,
button,
input,
select,
input,
select,
textarea {
    font-size: 100%;
}

iframe {
    display: block;
}

abbr,
acronym {
    border: none;
    font-variant: normal;
}


/* 让链接在 hover 状态下显示下划线 */
a:hover {
    text-decoration: underline;
}

/* 默认不显示下划线，保持页面简洁 */
ins,
a {
    text-decoration: none;
}

/* 去除 ie6 & ie7 焦点点状线 */
a:focus,
*:focus {
    outline: none;
}


/*默认a标签样式*/
a:link,
a:visited {
    color: #5e5e5e;
    text-decoration: none;
}

a:hover {
    /*color:#999;*/
}



/*浮动和清除浮动*/
.fl {
    float: left
}

.fr {
    float: right
}

.clear {
    zoom: 1
}

.clear:after {
    content: "";
    display: block;
    height: 0;
    visibility: visible;
    clear: both
}

/*显示隐藏*/
.hide {
    display: none
}

.show {
    display: block
}