.nav>div>ul>li:nth-of-type(4)>div:first-of-type {
    top: 0 !important;
}

.nav>div>ul>li:nth-of-type(4)>div:last-of-type {
    bottom: 0 !important;
}

.patent-box {
    margin: 75px auto 100px;
    width: 95%;
    max-width: 1400px;
}

.patent-box>div {
    padding: 70px 0 50px;
}

.patent-box>div>h1 {
    text-align: center;
    font-size: 30px;
    line-height: 30px;
    font-weight: normal;
    margin-bottom: 30px;
}

.patent-box p {
    font-size: 42px;
}

.patent-box span {
    font-size: 16px;
    text-align: center;
}

.patent-type {
    background: url(/html/images/type-bg.jpg) no-repeat center;
    background-size: cover;
    color: white;
}

.patent-type .line-type {
    position: relative;
}

.patent-type .line-type::before,
.patent-type .line-type::after {
    content: '';
    height: 107px;
    width: 1px;
    background: white;
    position: absolute;
    left: 0;
    top: 30px;
    display: inline-block;
}

.patent-type .line-type::after {
    right: 0;
    left: auto;
}


.patent-area .line-area {
    position: relative;
}

.patent-area .line-area::before {
    content: '';
    height: 107px;
    width: 1px;
    background: rgb(0, 118, 192);
    position: absolute;
    left: 0;
    display: inline-block;
}

.patent-area {
    background: url(/html/images/area-bg.jpg) no-repeat center;
    background-size: cover;
    color: rgb(0, 118, 192);
}


.patent-box>div>section {
    display: flex;
    justify-content: space-between;
}

.patent-box>div>section>div {
    width: calc(100%/3);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
}

.patent-box>.patent-area>section>div {
    width: calc(100%/2);
}

.patent-box>div>section>div>i {
    width: 70px;
    padding-top: 80px;
    background-position: center;
    background-repeat: no-repeat;
}

.patent-bg {
    box-sizing: border-box;
    padding: 30px;
    height: 362px;
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    background: url(/html/images/patent-bg.jpg) no-repeat center;
    background-size: cover;
}

.patent-bg>h1 {
    font-weight: normal;
    font-size: 35px;
    line-height: 35px;
    padding-bottom: 35px;
}

.patent-bg>p {
    text-align: center;
    line-height: 25px;
    font-size: 17px;
}

@media screen and (max-width:1400px) {
    .patent-box {
        margin: calc(75/1400*100%) auto calc(100/1400*100%);
    }
}