/* 轮播图 */
.banner_box{
    width: 100%;
    height:35vw;
    overflow: hidden;
    position: relative;
}
.banner {
   width: 100%;
   height: 100%;
   overflow: hidden;
   z-index: 1;
}
.swiper-wrapper{
    width:100%;
    height:100%;
}
.swiper-slide{
    width:100%;
    height:100%;
}
.swiper-slide img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.banner_box ul {
    position: absolute;
    width:80%;
    height:7.5vw;
    bottom: 0;
    left: 10%;
    display: flex;
    justify-content: center;
    background: rgba(0, 0, 0, 0.6);
    z-index: 2;
}

.banner_box ul li {
    flex: 1;
    color: #fff;
    padding:1vw 1vw 1vw 2vw;
    transition: all 0.3s ease;
    position: relative;
}
.banner_box ul li:not(:last-child)::after {
    content: "";
    position: absolute;
    top: 15%;
    right: 0;
    width: 1px;
    height: 70%;
    background: url(../images/banner_line.png) no-repeat center center / 100% 100%;
}

.banner_box ul li img {
    width: 1.5vw;
    height: 1.5vw;
    transition: 0.1s ease;
}
.banner_box ul li:hover,
.banner_box ul li.on {
    background-color: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(15px);
}
.banner_box ul li div {
    font-size: 1vw;
    /* line-height: 1; */
    font-weight: 600;
    color: #fff;
    margin-top:0.5vw;
    margin-bottom: 0.5vw;
    transition: 0.3s ease;
}

.banner_box ul li p {
    font-size: 0.8vw;
    color: #b0bec5;
    line-height: 1.5;
    transition: 0.3s ease;
}

.banner_box ul li:hover div,
.banner_box ul li.on div{
    color:rgba(250,250,250,0.8);
}
.banner_box ul li:hover p,
.banner_box ul li.on p{
   color:rgba(250,250,250,0.8);
}
.banner_box ul li:hover img,
.banner_box ul li.on img{
   filter: brightness(0) saturate(100%) invert(39%) sepia(85%) saturate(4500%) hue-rotate(213deg) brightness(90%) contrast(110%);
}


/* 产品及服务 */
.products {
    padding: 80px 0;
    /* background: #f5f5f5; */
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 3vw;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}

.section-header p {
    font-size: 1vw;
    color: #4D4D4D;
    letter-spacing: 2px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.5vw;
}

.product-card {
    height:22vw;
    /* background: url(./images/product_bg.png) no-repeat center center / 100% 100%; */
    background-repeat: no-repeat;
    background-position: center center;
    background-size: 100% 100%;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s, box-shadow 0.3s;
    position: relative;
    z-index: 1;
}
.product-card::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 60%;
    background: linear-gradient(180deg, rgba(117, 117, 117, 0) 0%, rgba(3, 3, 3, 0.82) 61.81%);
    transition: height 0s ease, background 0.3s ease;
    z-index: 2;
    pointer-events: none;
}
.products-content{
    position: absolute;
    left:0;
    bottom:0;
    width:100%;
    height:50%;
    padding: 1.5vw 1vw 1.5vw 1.5vw;
    z-index: 3;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.product-card:hover::after {
    /* height:100%; */
    /* background: rgba(2, 66, 176, 0.55); */
    background: rgba(2, 66, 176, 0.7);
    /* backdrop-filter: blur(30px); */
    /* mix-blend-mode: multiply; */
    /* background: linear-gradient(180deg, rgba(135, 135, 135, 0) 0%, rgba(35, 35, 35, 0.82) 61.81%); */
}
/* background: linear-gradient(180deg, rgba(135, 135, 135, 0) 0%, rgba(35, 35, 35, 0.82) 61.81%); */

.products-content div {
    font-size: 1vw;
    color: #fff;
    line-height: 1.8;
    transition: all 0.3s ease;
}

.products-content p {
    font-size: 0.7vw;
    color: #fff;
    line-height: 1.8;
    margin-top: 10px;
}
.brands {
    padding: 80px 0;
    background: #fff;
}

.brands-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 30px;
}

.brand-item {
    height: 80px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s;
    cursor: pointer;
}

.brand-item:hover {
    transform: scale(1.05);
}

.brand-item img {
    max-height: 90%;
    max-width: 90%;
}

.about {
    display: flex;
    background: #f5f5f5;
}

.about-image {
    width: 40%;
    height: 35vw;
    overflow: hidden;
    cursor: pointer;
    position: relative;
    z-index: 1;
}

.about-image img{
    width: 100%;
    height: 100%;
    object-fit: cover;
}
.about-image::after{
    content: "立足长三角，服务芯时代";
    content: "\7ACB\8DB3\957F\4E09\89D2\FF0C\670D\52A1\82AF\65F6\4EE3";
    position: absolute;
    bottom: 1.5vw;
    right: 0;
    width: fit-content;
    height: 2.5vw;
    background: rgba(0, 0, 0, 0.9);
    z-index: 2;
    font-size:1.8vw;
    line-height: 2.5vw;
    color: #fff;
    padding:0 10px;
}
.about-content {
    width: 60%;
    padding: 0 60px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.about-content h2 {
    font-size: 1.6vw;
    font-weight: 600;
    color: #333;
    margin-bottom: 10px;
}
.about-content div{
    font-size: 1vw;
    color:#4D4D4D;
    font-weight: bold;
    margin-bottom: 20px;
}

.about-content p {
    font-size: 0.9vw;
    color: #666;
    line-height: 1.9;
    margin-bottom: 20px;
}

.about-content .btn-more {
    margin-top: 15px;
    background-color: #E0E0E0;
    padding: 15px 40px;
    border-radius: 2px;
    display: inline-block !important;
    max-width: fit-content;
    transition: all 0.3s ease;
}

.about-content .btn-more:hover{
    background-color: #0242b0;
    color:#fff;
}

.why-us {
    margin-top: 30px;
    padding: 80px 0;
    background: url(../images/why-us-bg.png) no-repeat center center / 100% 100%;
}

.why-us .section-header h2 {
    color: #fff;
}

.why-us-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.why-us-item {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 2vw;
    transition: all 0.3s;
    border: 1px solid rgba(255, 255, 255, 0.1);
    cursor: pointer;
}

.why-us-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-5px);
}

.why-us .section-header p{
    color:rgba(255, 255, 255, 0.8);
}

.why-us-item h3 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 15px;
}

.why-us-item p {
    font-size: 14px;
    color: #fff;
    line-height: 1.7;
}

/* 荣誉资质 */
.certifications {
    padding: 80px 0;
    background: #f5f5f5;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.cert-card {
    /* background: #2D2D33; */
    background: #fff;
    border-radius: 12px;
    text-align: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    transition: all 0.3s;
}
.cert-card a{
    padding: 15px;
}

.cert-card:hover {
    transform: translateY(-5px);
    /* background: #0242b0; */
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.12);
}

.cert-icon {
    width: 100%;
    /* height: 20vw; */
    height:auto;
    margin: 0 auto 3px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.cert-icon img{
    width: 100%;
    height:auto;
    border-radius: 8px;
}

.cert-card h3 {
    font-size: 18px;
    color: #fff;
    margin-bottom: 10px;
}

.cert-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
}

.cert-card div{
    /* margin-top: 40px; */
    font-size: 14px;
    /* color: rgba(255, 255, 255, 0.5); */
    color:rgba(0, 0, 0, 0.8);
}



@media (max-width: 1280px) {
    
    .brands-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .why-us-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    /* .certifications-grid {
        grid-template-columns: repeat(2, 1fr);
    } */
    
    .about {
        flex-direction: column;
    }
    
    .about-image,
    .about-content {
        width: 100%;
    }
}