.secban {
    width: 100%;
    height: auto;
    max-height: calc(100vh - 110px);
    overflow: hidden;
    position: relative;
}
.secban img {
	width: 100%;
	height: auto;
    display: block;
    visibility: hidden;
}
.secbant {
    position: absolute;
    z-index: 10;
    color: #fff;
    visibility: hidden;
}
.secbant span {
    display: block;
    line-height: 160%;
}
.secbant span:nth-child(1) {
    font-size: 3.75rem;
    font-weight: bold;
}
.secbant span:nth-child(2) {
    font-size: 1.25rem;
    margin-top: 10px;
}
.bant1 {
    left: 18%;
    top: 14%;
    text-align: left;
}
.bant2 {
    right: 18%;
    top: 14%;
    text-align: right;
}
.bant3 {
    width: 100%;
    left: 0;
    top: 50%;
    margin-top: -3rem;
    text-align: center;
}
.bant4 {
    left: 18%;
    bottom: 10%;
    text-align: left;
}
.bant5 {
    right: 18%;
    bottom: 10%;
    text-align: right;
}
.txtshadow {
    text-shadow: 0 1px 1px #000;
}

.noban {
    padding-top: 70px;
}

.secbar {
    width: 100%;
    height: 50px;
    line-height: 50px;
    border-bottom: 1px solid #d5d5d5;
}
.secbar a {
    display: inline-block;
    vertical-align: top;
    margin-right: 30px;
    font-size: 1rem;
    position: relative;
}
.secbar a.on {
    font-weight: bold;
    color: #b4926a;
}
.secbar a.on::after {
    content: '';
    width: 100%;
    height: 3px;
    background: #b4926a;
    position: absolute;
    left: 0;
    bottom: -1px;
}

.yyok {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: rgba(255, 255, 255, .85);
    backdrop-filter: blur(5px); /* 毛玻璃效果 */
    position: absolute;
    left: 0;
    top: 0;
    z-index: 20;
    display: none;
}
.okp {
    width: 80px;
    height: 80px;
    background: #0b4994;
    border-radius: 50%;
    margin: 100px auto 0 auto;
    overflow: hidden;
}
.okp img {
    width: 60%;
    height: 60%;
    margin: 20%;
    display: block;
}
.okt {
    line-height: 80px;
    text-align: center;
    font-size: 1.6rem;
}
.oki {
    width: 100%;
    line-height: 50px;
    font-size: 1rem;
    color: #666;
    text-align: center;
}
.okb {
    width: 150px;
    line-height: 40px;
    border-radius: 20px;
    text-align: center;
    background: #0b4994;
    color: #fff;
    font-size: 1.125rem;
    cursor: pointer;
    margin: 50px auto 0 auto;
}


@media screen and (max-width: 1680px) {
    .secbant span:nth-child(1) {
        font-size: 3rem;
    }
    .secbant span:nth-child(2) {
        font-size: 1rem;
    }
    .secbar {
        bottom: 60px;
    }
    .secnav {
        height: 36px;
    }
    .secnav span {
        padding: 0 25px;
        line-height: 36px;
        font-size: 0.875rem;
    }
}
@media screen and (max-width: 1440px) {
    .secbant span:nth-child(1) {
        font-size: 2.25rem;
    }
    .secbant span:nth-child(2) {
        font-size: 0.875rem;
    }
    .secbar {
        bottom: 50px;
    }
    .secnav {
        height: 34px;
    }
    .secnav span {
        padding: 0 20px;
        line-height: 34px;
    }
}
@media screen and (max-width: 1280px) {
    .secbant span:nth-child(1) {
        font-size: 2rem;
    }
    .secbant span:nth-child(2) {
        font-size: 0.75rem;
    }
}