.banner_box {
    width: 100%;
    height: calc(60px + 25rem);
    background: url(../images/zhgc.jpg) no-repeat;
    background-size: cover;
    position: relative;
}

.banner {
    max-width: 1420px;
    width: 85%;
    height: 100%;
    margin: auto;
    display: flex;
    flex-direction: column;
    justify-content: center;

}

.banner_nav_box {
    width: 100%;
    border-bottom: 1px #ffffff48 solid;
    position: absolute;
    top: 0;
    height: calc(10px + 2rem);
    display: flex;
    flex-direction: column;
    justify-content: center;

}

.banner_nav {
    max-width: 1420px;
    width: 85%;
    margin: auto;
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 0.5rem;
}

.banner_nav div {

    font-family: PINGFANG;
    font-weight: 300;
    font-size: calc(6px + 0.5rem);
    color: #FFFFFF;

}

.banner_text {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: flex-start;
    gap: calc(1px + 0.5rem);
}

.banner_text div:nth-of-type(1) {

    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(10px + 1.5rem);
    color: #FEFEFE;
}

.banner_text div:nth-of-type(2) {

    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(10px + 1rem);
    color: #FEFEFE;
}

.nav_box {
    width: 100%;

    height: calc(20px + 3rem);
    background: #FFFFFF;
    box-shadow: 0px 4px 6px 0px rgba(3, 15, 53, 0.05);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.nav {
    max-width: 1420px;
    width: 85%;
    height: 100%;
    margin: auto;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(9px + 30rem);
}

.nav .navItem {
    height: 100%;
    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(10px + 0.5rem);
    color: #333333;
    display: flex;
    align-items: center;
}
.nav .navItem:hover{
    color: #D21010;
}
.nav a{
    position: relative;
}
.nav a:hover .nav_line{
    width: 100%;
    transition: .5s;
}
.nav_line{
    width: 0;
    height: 1px;
    background-color: #D21010;
    position: absolute;
    bottom: 0;
    left: 0;
}

.nav a {
    height: 100%;
}

.nav a:nth-of-type(2) .navItem {
    color: #D21010;
    border-bottom: 1px #D21010 solid;

}

.ai_supply_box {
    width: 100%;

    background: url(../images/supply.png) no-repeat;
    background-size: cover;
    margin-top: 0.3rem;

}

.ai_supply {
    max-width: 1420px;
    width: 85%;
    margin: auto;
    overflow: hidden;
}

.ai_supply_title {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: calc(4px + 0.5rem);
    margin-top: calc(29px + 5rem);
}

.ai_supply_title div:nth-of-type(1) {

    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(2px + 1rem);
    color: #D21010;
}

.ai_supply_title div:nth-of-type(2) {

    font-family: PINGFANG;
    font-weight: 600;
    font-size: calc(10px + 1rem);
    color: #333333;
}

.ai_supply_intro {
    width: 82%;
    margin: auto;
    font-family: PINGFANG;
    font-weight: 300;
    font-size: calc(6px + 0.5rem);
    color: #4D4D4D;
    line-height: calc(2px + 1.5rem);
    text-align: center;
    margin-top: calc(5px + 2rem);
}

.ai_supply_num_box {
    width: 100%;
    height: calc(200px + 20rem);
    background: #FFFFFF;
    box-shadow: 0px 0px 40px 0px rgba(172, 179, 186, 0.24);
    border-radius: 12px;
    margin-top: calc(20px + 4rem);
    margin-bottom: calc(13px + 5rem);
    display: flex;
    justify-content: center;
    align-items: center;
}

.ai_supply_num {
    width: 92%;
    height: 84.4%;

    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
}

.ai_supply_card {
    width: 33.333%;
    height: 50%;

    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.ai_supply_card:nth-of-type(1) {
    border-right: 2px #E3E3E6 solid;
    border-bottom: 2px #E3E3E6 solid;
}

.ai_supply_card:nth-of-type(2) {
    border-right: 2px #E3E3E6 solid;
    border-bottom: 2px #E3E3E6 solid;
}

.ai_supply_card:nth-of-type(3) {
    border-bottom: 2px #E3E3E6 solid;
}

.ai_supply_card:nth-of-type(4) {
    border-right: 2px #E3E3E6 solid;

}

.ai_supply_card:nth-of-type(5) {
    border-right: 2px #E3E3E6 solid;

}

.ai_supply_card p:nth-of-type(1) {

    font-family: PINGFANG;
    font-weight: bold;
    font-size: calc(8px + 2rem);
    color: #D21010;

}

.ai_supply_card p:nth-of-type(2) {
    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(6px + 0.5rem);
    color: #999999;
    line-height: calc(2px + 1.5rem);
    width: calc(37px + 4rem);
    text-align: center;
}

.feature_box {
    width: 100%;
    padding-bottom: calc(92px + 5rem);
}

.feature {
    max-width: 1420px;
    width: 85%;
    margin: auto;
}

.feature_title {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    align-items: center;
    gap: calc(10px + 1rem);
    margin-top: calc(30px + 5rem);
}

.feature_title div:nth-of-type(1) {

    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(10px + 1rem);
    color: #333333;
}

.feature_title div:nth-of-type(2) {

    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(10px + 0.5rem);
    color: #333333;

    opacity: 0.8;
}

.feature_card_box {
    width: 100%;
    display: flex;
    justify-content: space-between;
    margin-top: calc(5px + 3rem);

}

.feature_card {
    width: 48.5%;
    height: calc(80px + 10rem);

    background: #F5F6F8;
    border-radius: 0px 0px 0px 60px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: calc(7px + 2rem);
    cursor: pointer;
}

.feature_card img {
    width: calc(11px + 4rem);
}


.feature_card .active1 {
    animation: animate1 .3s linear;
    animation-fill-mode: forwards;
}

.feature_card .active2 {
    animation: animate2 .3s linear;
    animation-fill-mode: forwards;
}

@keyframes animate1 {
    0% {
        transform: rotateY(0deg);
    }

    100% {
        transform: rotateY(180deg);
    }
}

@keyframes animate2 {
    0% {
        transform: rotateY(180deg);
    }

    100% {
        transform: rotateY(0deg);
    }
}

.card_text {
    display: flex;
    flex-direction: column;
    justify-content: flex-start;
    gap: calc(1px + 0.25rem);
}

.card_text p:nth-of-type(1) {

    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(4px + 1.5rem);
    color: #003666;

}

.card_text p:nth-of-type(2) {

    font-family: PINGFANG;
    font-weight: 400;
    font-size: calc(8px + 0.5rem);
    color: #5E708A;
    line-height: calc(10px + 1rem);
    width: calc(120px + 5rem);
}



.feature_link {
    width: calc(21px + 10rem);
    display: flex;
    justify-content: flex-start;
    align-items: center;
    gap: 0.025rem;
    margin: auto;
    margin-top: calc(19px + 2rem);
}

.feature_link div:nth-of-type(1) {
    width: calc(78px + 5rem);
    background: #D21010;
    border: 1px solid #FFFFFF;

    font-family: PINGFANG;
    font-weight: 300;
    font-size: calc(8px + 0.5rem);
    color: #FFFFFF;
    line-height: calc(20px + 2rem);
    text-align: center;
}

.feature_link div:nth-of-type(2) {
    width: calc(3px + 2rem);
    background: #D21010;
    font-family: PINGFANG;
    font-weight: 600;
    font-size: calc(8px + 0.5rem);
    color: #FFFFFF;
    height: calc(20px + 2rem);
    display: flex;
    justify-content: center;
    align-items: center;
}

@media (max-width: 1100px) {
    .banner_nav_box {
        display: none;
    }

    .ai_supply_title div:nth-of-type(1) {
        font-size: calc(9px + 1rem);
    }

    .ai_supply_title div:nth-of-type(2) {
        font-size: calc(16px + 1rem);
    }

    .ai_supply_intro {
        width: 100%;
        font-size: calc(10px + 1rem);
        line-height: calc(17px + 1rem);
        text-align: justify;

    }

    .ai_supply_num {
        padding: calc(5px + 1rem) 0;
    }

    .ai_supply_num_box {
        height: auto;
    }

    .ai_supply_card {
        width: 50%;
        border: none;
        padding: calc(5px + 0.5rem);
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        align-items: center;
        gap: calc(5px + 0.5rem);
        height: auto;
    }

    .ai_supply_card:nth-of-type(2) {
        border-right: none;
    }

    .ai_supply_card:nth-of-type(3) {
        border-right: 2px #E3E3E6 solid;
    }

    .ai_supply_card:nth-of-type(4) {
        border-right: none;
        border-bottom: 2px #E3E3E6 solid;
    }

    .ai_supply_card p:nth-of-type(1) {
        font-size: calc(12px + 1rem);
    }

    .ai_supply_card p:nth-of-type(2) {
        font-size: calc(9px + 1rem);
        width: 100%;
        line-height: calc(5px + 3.5rem);
    }

    .feature_box {

        padding-bottom: calc(40px + 5rem);
    }

    .feature_title div:nth-of-type(1) {
        font-size: calc(14px + 1rem);
    }

    .feature_title div:nth-of-type(2) {
        font-size: calc(10px + 1rem);
    }

    .feature_card_box {
        display: flex;
        flex-direction: column;
        justify-content: flex-start;
        gap: calc(10px + 1rem);
    }

    .feature_card {
        width: 100%;
        border-radius: 8px;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .feature_card img {
        width: calc(20px + 7rem);
    }

    .card_text p:nth-of-type(1) {
        font-size: calc(14px + 1rem);
    }

    .card_text p:nth-of-type(2) {
        font-size: calc(9px + 1rem);
    }

    .feature_link {
        width: auto;
        margin: auto;
        display: flex;
        justify-content: center;
        margin-top: calc(10px + 3rem);
        gap: 0.025rem;
    }

    .feature_link div:nth-of-type(2) {


        width: auto;
        display: flex;
        justify-content: center;
        align-items: center;

    }

    .feature_link div:nth-of-type(2) img {
        width: calc(0.8px + 0.3rem);
    }
}