* {
    margin: 0;
    box-sizing: border-box;
}

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-size: 100%;
    font: inherit;
    vertical-align: baseline;
}

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

body {
    line-height: 1;
}

ol,
ul {
    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;
}

body {
    background: #fff;
}

.img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    background: #fff;
    border-bottom: 1px solid #e3e3e3;
    z-index: 99;
}

.header-content {
    display: flex;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    height: 50px;
    box-sizing: border-box;
    padding: 0 10px;
}

.menu-btn {
    width: 24px;
    height: 24px;
    background: url('./imgs/menu.png') no-repeat center;
    background-size: 100% auto;
    display: none;
}

.menu-btn.show {
    background: url('./imgs/close.png') no-repeat center;
    background-size: 100% auto;
}


.header .logo {
    width: 75px;
    height: 32px;
    margin-right: 80px;
}

.navbars-item_wrapper {
    display: flex;
}

.navbar-item_wrapper {
    padding: 0 30px;
    font-size: 16px;
    color: #000;
    height: 50px;
    display: flex;
    align-items: center;
}

.content-wrapper {
    padding-top: 50px;
}

.footer-wrapper {
    margin-top: 20px;
    background-color: #f2f4f6;
    position: relative;
    padding: 40px 0 74px;
}

.footer-item_title {
    font-size: 16px;
    color: #000;
    margin-bottom: 10px;
    line-height: 32px;
}

.footer-item_link {
    margin-bottom: 10px;
    font-size: 14px;
    color: rgba(0, 0, 0, 0.6);
    line-height: 22px;
}

.copyright-wrapper {
    position: absolute;
    height: 44px;
    bottom: 0;
    left: 0;
    right: 0;
    background: #e4e8ec;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 12px;
    color: rgba(0, 0, 0, .7);
}

.copyright-btn_wrapper {
    padding-left: 10px;
    color: rgba(0, 0, 0, .7);
}

.copyright-title {
    margin-right: 10px;
}

a {
    text-decoration: none;
}

.copyright-btn_wrapper:first-of-type {
    padding-right: 10px;
    border-left: 1px solid rgba(0, 0, 0, .5);
}

.copyright-btns_wrapper {
    display: flex;
}

@media (max-width: 768px) {
    .navbars-item_wrapper {
        display: none;
    }

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

    .menu-btn {
        display: block;
    }
}

.menu-wrapper {
    z-index: 999;
    position: fixed;
    top: 50px;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.7);
    display: none;
}

.menu-wrapper.show {
    display: block;
}

.menu-link_wrapper {
    font-size: 12px;
    padding: 15px 30px;
    display: block;
    color: #333;
}

.menu-mask {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 20;
}

.menu-content {
    z-index: 30;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 40px 30px 20px;
    background: #f2f4f6;
}