h2 {
    font-family: Source Han Sans CN VF;
    font-weight: bold;
    font-size: 30px;
    line-height: 1;
    margin-bottom: 40px;
}

/* banner - start */
.banner {
    width: 100%;
}

.banner img {
    display: block;
    margin: auto;
}

.banner section {
    left: 0;
    width: 100%;
    text-align: center;
    top: 50%;
    transform: translateY(-50%);
}

.banner h1,
.banner h3 {
    font-family: Source Han Sans CN VF;
    font-weight: bold;
    font-size: 47px;
    color: #212121;
    line-height: 1;
    margin-bottom: 17px;
}

.banner p {
    font-family: Source Han Sans CN VF;
    font-weight: 400;
    font-size: 18px;
    color: #626262;
    line-height: 1;
}

/* banner - end */

/* index_block1 - start */
.index_block1 {
    background: #f8f8f8;
    width: 100%;
    padding-top: 80px;
    padding-bottom: 105px;
}

.index_block1 .center {
    background: linear-gradient( to bottom, #efefef 0%, #f8f8f8 100%);
    border-radius: 8px;
    padding-bottom: 58px;
    padding-top: 50px;
    padding-left: 27px;
    padding-right: 30px;
    margin-bottom: 79px;
}

.index_block1 .center img {
    display: block;
    margin: 0 auto 40px;
}

.index_block1 .center p {
    font-family: Source Han Sans CN VF;
    font-weight: 400;
    font-size: 16px;
    color: #212122;
    line-height: 28px;
    margin-bottom: 10px;
    text-align: left;
}

.index_block1 .down_l {
    background-image: url(https://zkmall-pc.oss-cn-shenzhen.aliyuncs.com/images/about/down_l.png);
}

.index_block1 .down_r {
    background-image: url(https://zkmall-pc.oss-cn-shenzhen.aliyuncs.com/images/about/down_r.png);
}

.index_block1 .down div {
    width: 631px;
    height: 175px;
    padding-top: 39px;
    padding-left: 27px;
    padding-right: 30px;
    box-sizing: border-box;
    background-size: 100% 100%;
    background-repeat: no-repeat;
}

.index_block1 .down div h4 {
    font-family: Source Han Sans CN VF;
    font-weight: bold;
    font-size: 30px;
    line-height: 1;
    color: #212122;
    margin-bottom: 17px;
}

.index_block1 .down div p {
    font-family: Source Han Sans CN VF;
    font-weight: 400;
    font-size: 16px;
    color: #212122;
    line-height: 22px;
    text-align: left;
}

/* index_block1 - end */

/* index_block2 - start */
.index_block2 {
    padding-top: 79px;
    padding-bottom: 100px;
}

.index_block2 ul {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 17px;
}

.index_block2 ul li {
    width: 100%;
    aspect-ratio: 1;
    background: linear-gradient(0deg, #efefef, #ffffff);
    box-shadow: 0px 3px 20px 0px rgba(0, 0, 0, 0.1);
    border-radius: 8px;
    border: 1px solid #ffffff;
    padding: 18px 30px;
    text-align: center;
    box-sizing: border-box;
}

.index_block2 ul li img {
    display: block;
    margin: 0 auto 20px;
}

.index_block2 ul li h4 {
    font-family: Source Han Sans CN VF;
    font-weight: bold;
    font-size: 30px;
    color: #212122;
    margin-bottom: 18px;
}

.index_block2 ul li p {
    text-align: left;
}

.index_block2 ul li h4::before,
.index_block2 ul li h4::after {
    content: "-";
    color: #d1d1d1;
}

.index_block2 ul li h4::before {
    margin-right: 4px;
}

.index_block2 ul li h4::after {
    margin-left: 4px;
}

/* index_block2 - end */

/* index_block3 - start */
.index_block3 {
    padding-top: 80px;
    width: 100%;
    padding-bottom: 75px;
    background: #f8f8f8;
}

.index_block3 img {
    display: block;
    width: 1280px;
    height: auto;
    margin: 0 auto;
}

/* index_block3 - end */