div {
    box-sizing: border-box;
}

.demonstration-top {
    width: 100%;
    height: 420px;
    min-width: 1400px;
    position: relative;
    display: flex;
    justify-content: center;
    

}
.case-banner{
    position: absolute;
    width: 100%;
    height: 100%;
   background-size:cover;
background-repeat: no-repeat;
    animation: case-banner 1s ;
    z-index: -1;
}
@keyframes case-banner {
    0% {
        transform: scale(1.2);
        /*transform: translateZ(-800px);*/
    }
    100% {
        transform: scale(1);
        /*transform: translateZ(-800px);*/
    }
}

.demonstration-top-bg {
    width: 537px;
    height: 280px;
    margin-top: 41px;
    animation: case-banner-desc 1s ;
}

@keyframes case-banner-desc {
    0% {
        transform: scale(0.7);
        /*transform: translateZ(-800px);*/
    }
    100% {
        transform: scale(1);
        /*transform: translateZ(-800px);*/
    }
}
.demonstration-top-desc {
    height: 100%;
    display: flex;
    flex-direction: column;
    margin: 103px 0 0 0;
}

.demonstration-top-desc-title {
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: bold;
    font-size: 48px;
    color: rgba(117, 131, 158, 0.2);
    line-height: 56px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    animation: top-desc-title 1s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
}
@keyframes top-desc-title {
    0% {
        transform: translateX(-100px) translateY(-100px);
        opacity: 0;
    }
    100% {
        transform: translateX(0) translateY(0) translateZ(-800px);
        opacity: 1;
    }
}
.demonstration-top-desc-content {
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: bold;
    font-size: 54px;
    color: #1F2F37;
    line-height: 63px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    animation: top-desc-content 1s cubic-bezier(0.390, 0.575, 0.565, 1.000) both;
}
@keyframes top-desc-content {
    0% {
        -webkit-transform: translateX(100px) translateY(100px);
        transform: translateX(100px) translateY(100px);
        opacity: 0;
    }
    100% {
        -webkit-transform: translateX(0) translateY(0);
        transform: translateX(0) translateY(0);
        opacity: 1;
    }
}
.demonstration-content-navbar {
    width: 1400px;
    height: 135px;
    background: linear-gradient(180deg, #DEE9FF 0%, rgba(224, 235, 255, 0) 100%), rgba(255, 255, 255, 0.8);
    box-shadow: inset 0px 4px 4px 0px rgba(255, 255, 255, 0.25);
    border-radius: 9px;
    border: 1px solid #FFFFFF;
    margin: -92px;
    display: flex;
    justify-content: space-between;
    padding: 0 80px;
    cursor: pointer;
}


.demonstration-content {
    width: 100%;
    min-width: 1400px;
    background-color: #EEF2FB;
    display: flex;
    align-items: center;
    flex-direction: column;
    padding-bottom:80px ;
}

.demonstration-content-navbar-inner {
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;

}
.demonstration-content-navbar-inner-line {
    width: 100%;
    height: 3px;
    background: linear-gradient( 90deg, #618DE2 0%, #73DCFF 100%);
    display: none;
    position: absolute;
    bottom: 0;
}
.demonstration-content-navbar-inner-desc {
    display: flex;
    flex-direction: column;
}

.demonstration-content-navbar-inner-desc-title {
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: 500;
    font-size: 20px;
    color: #262626;
    line-height: 23px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-bottom: 7px;
}

.demonstration-content-navbar-inner-desc-content {
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: 400;
    font-size: 14px;
    color: #8C8C8C;
    line-height: 16px;
    text-align: left;
    font-style: normal;
    text-transform: none;
}

.demonstration-content-main-btn {
    width: 1400px;
    height: 54px;
    display: flex;
    justify-content: space-between;
    margin: 142px 0 32px 0;
}

.demonstration-content-main-btn-title {
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: bold;
    font-size: 36px;
    color: #404040;
    line-height: 42px;
    text-align: center;
    font-style: normal;
    text-transform: none;
}

.demonstration-content-main-btn-BTN {
    display: flex;
    justify-content: space-between;
}

.demonstration-content-main-btn-BTN button {
    width: 104px;
    height: 43px;
    background: #FFFFFF;
    border-radius: 6px 6px 6px 6px;
    border: 1px solid #E3E3E3;
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: bold;
    font-size: 18px;
    color: #8F8F8F;
    line-height: 22px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin: 5px 0 6px 12px;
    text-align: center;
    cursor: pointer;
}

.demonstration-content-main {
    width: 1400px;
    display: flex;
    flex-wrap: wrap;
    gap: 21px;
}

.demonstration-content-main-box {
    width: 452px;
    min-height: 340px;
    margin-bottom: 20px;
    cursor: pointer;
    background: #fff;
    transition: all 0.7s ease; /* 只使用transform进行过渡动画 */'
}
.demonstration-content-main-box:hover {
    transform: scale(1.04);
    box-shadow: 0 15px 10px -15px #B5CEFF;
}
.demonstration-content-main-bg {
    width: 100%;
    height: 235px;
   background-size:cover;
background-repeat: no-repeat;
}

.demonstration-content-main-desc {
    width: 452px;
    min-height: 152px;
    padding: 24px 16px;
    display: flex;
    flex-direction: column;
    background: #FFFFFF;
    border-radius: 0px 3px;
}

.demonstration-content-main-desc-title {
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: 500;
    font-size: 18px;
    color: #262626;
    line-height: 22px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    margin-bottom: 16px;
}

.demonstration-content-main-desc-content {
    font-family: Source Han Sans SC, Source Han Sans SC;
    font-weight: 400;
    font-size: 14px;
    color: #8C8C8C;
    line-height: 22px;
    text-align: left;
    font-style: normal;
    text-transform: none;
    display: -webkit-box;
    -webkit-box-orient: vertical;
    overflow: hidden;
    -webkit-line-clamp: 2;
}