* {
  -webkit-tap-highlight-color: transparent;
}

article,
aside,
details,
figcaption,
figure,
footer,
header,
main,
nav,
section {
  display: block;
}

div,
html,
body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
code,
form,
fieldset,
legend,
input,
textarea,
select,
p,
blockquote,
th,
td,
hr,
button,
article,
aside,
details,
figcaption,
figure,
footer,
header,
hgroup,
menu,
nav,
section,
main {
  margin: 0;
  padding: 0;
}
html,body{
   background-color: #F5F5F5;
}
header {
    padding: 20px;
    background-color: #ffffff;    
}
main {
    padding: 20px;
    width: 1200px;
    margin: 0 auto;
}

footer {
    padding: 20px;
    background-color: #ffffff;    
}

.flex{
   display:flex;
}

.flex-nowrap{
   flex-wrap: nowrap;
}

.flex-wrap{
    flex-wrap: wrap;
}

.item-center{
    align-items: center;
}

.justify-center{
    justify-content: center;
}

.align-center{
    align-items: center;
}

a,li{
  text-decoration: none;
  list-style: none;
  color: #666666;
}

/* color */
.color-666{
    color: #666666;
}
.color-333{
    color: #333333;
}
.color-fff{
    color: #ffffff;
}
.color-f5f5f5{
    color: #F5F5F5;
}
.color-000{
    color: #000000;
}
.color-007bff{
    color: #007bff;
}