.header-nav {
    width: calc(100% - 0.8rem);
    max-width: calc(750px - 0.8rem);
    margin: 0 auto;
    height: 1.46rem;
    display: flex;
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    padding: 0 0.4rem;
    background: #ffffff;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 99;
    box-shadow: 0 0.08rem 0.28rem 0.02rem rgba(18, 63, 64, 0.33);
}

.company-logo {
    width: 4.5rem;
}

.nav-right {
    display: flex;
    flex-direction: row;
    align-items: center;
}

.sys-ico1 {
    width: 0.75rem;
}

.sys-ico2 {
    width: 0.8rem;
    margin-left: 0.67rem;
}

/*遮罩层*/
/* Overlay style */
.overlay {
    position: fixed;
    width: 100%;
    max-width: 750px;
    margin: 0 auto;
    height: 100%;
    top: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to right, #06beb6, #48b1bf);;
    z-index: 999;
    overflow: auto;
}

/* Overlay closing cross */
button {
    margin: 0;
    padding: 0;
    background-color: transparent;
    border: 0px solid transparent;
    outline: none;
}

.overlay .overlay-close {
    width: 0.57rem;
    height: 0.57rem;
    position: absolute;
    right: 0.56rem;
    top: 0.42rem;
    background-image: url("http://cache.xaangel.net/multiply.svg");
    background-size: contain;
    z-index: 100;
}

/* Effects */
.overlay-corner {
    opacity: 0;
    visibility: hidden;
    -webkit-transform: translateY(50px) translateX(50px);
    transform: translateY(50px) translateX(50px);
    -webkit-transition: opacity 0.5s, -webkit-transform 0.5s, visibility 0s 0.5s;
    transition: opacity 0.5s, transform 0.5s, visibility 0s 0.5s;
}

.overlay-corner.open {
    opacity: 1;
    visibility: visible;
    -webkit-transform: translateY(0%);
    transform: translateY(0%);
    -webkit-transition: opacity 0.5s, -webkit-transform 0.5s;
    transition: opacity 0.5s, transform 0.5s;
}

@media screen and (max-height: 30.5em) {
    .overlay nav {
        height: 70%;
        font-size: 34px;
    }

    .overlay ul li {
        min-height: 34px;
    }
}

/* Menu style */
.overlay-header {
    margin: 1.6rem 0.5rem 0;
    display: flex;
    flex-direction: row;
    justify-content: space-around;
    align-items: center;
    height: 1.63rem;
    border-radius: 0.1rem;
    border: solid 0.03rem #eeeeee;
}

.overlay-contact {
    width: 50%;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.overlay-net-name {
    margin-top: 0.02rem;
    font-family: NotoSansHans-DemiLight;
    font-size: 0.36rem;
    font-weight: normal;
    font-stretch: normal;
    line-height: 0.51rem;
    letter-spacing: 0.07rem;
    color: #ffffff;
}

.overlay-net-icon {
    width: 0.7rem;
}

.overlay-phone-icon {
    width: 0.7rem;
}

.overlay-content {
    padding: 0.88rem 0 0 0.88rem;
}

.overlay-link-name {
    padding: 0.25rem 0;
    font-family: NotoSansHans-DemiLight;
    font-size: 0.36rem;
    font-weight: normal;
    font-stretch: normal;
    line-height: 0.51rem;
    letter-spacing: 0.07rem;
    color: #ffffff;
}