html, body {
    ::-webkit-scrollbar {
        display: none;
    };
}
/* header */
header {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 99999;
    width: 100%;
    height: 0;
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    padding: 0 100px;
    transition: height 1s;
}
.nav {
    display: flex;
}
.nav * {
    color: #fff;
}
.m_none_link {
    width: 300px;
}
.nav_link {}
.nav_link a, .nav_link button {
    display: block;
    width: 100px;
    height: 50px;
    text-align: center;
    line-height: 80px;
}
h1 {
    height: 40px;
}
h1 img {
    height: 100%;
}
/* -----------------------footer----------------------- */
footer {
    padding: 1%;
    border-top: 2px solid #5e5e5e;
}
footer * {
    color: #fff;
    font-size: 0.8rem;
}
.f_info {
    margin-bottom: 10px;
}
.f_info, .f_link {
    display: flex;
    justify-content: center;
    align-items: center;
}
.f_info li {
    margin-right: 3%;
}
.f_link li {
    margin-right: 4%;
}
.f_info li:last-child, .f_link li:last-child {
    margin-right: 0;
}
.f_link li a {}