index.css

* {
    margin: 0;
    padding: 0;
}

html, body {
    width: 100vw;
    background: black;
    font-family: monospace, Helvetica,Arial,sans-serif;
}

body::after{
    position: absolute;
    left:0;
    top:0;
    width:100%;
    height: 500px;
    content: "";
    background: linear-gradient(130deg,#ff7a18,#af002d 41.07%,#319197 76.05%);
    clip-path: polygon(100% 0,0 0,0 77.5%,1% 77.4%,2% 77.1%,3% 76.6%,4% 75.9%,5% 75.05%,6% 74.05%,7% 72.95%,8% 71.75%,9% 70.55%,10% 69.3%,11% 68.05%,12% 66.9%,13% 65.8%,14% 64.8%,15% 64%,16% 63.35%,17% 62.85%,18% 62.6%,19% 62.5%,20% 62.65%,21% 63%,22% 63.5%,23% 64.2%,24% 65.1%,25% 66.1%,26% 67.2%,27% 68.4%,28% 69.65%,29% 70.9%,30% 72.15%,31% 73.3%,32% 74.35%,33% 75.3%,34% 76.1%,35% 76.75%,36% 77.2%,37% 77.45%,38% 77.5%,39% 77.3%,40% 76.95%,41% 76.4%,42% 75.65%,43% 74.75%,44% 73.75%,45% 72.6%,46% 71.4%,47% 70.15%,48% 68.9%,49% 67.7%,50% 66.55%,51% 65.5%,52% 64.55%,53% 63.75%,54% 63.15%,55% 62.75%,56% 62.55%,57% 62.5%,58% 62.7%,59% 63.1%,60% 63.7%,61% 64.45%,62% 65.4%,63% 66.45%,64% 67.6%,65% 68.8%,66% 70.05%,67% 71.3%,68% 72.5%,69% 73.6%,70% 74.65%,71% 75.55%,72% 76.35%,73% 76.9%,74% 77.3%,75% 77.5%,76% 77.45%,77% 77.25%,78% 76.8%,79% 76.2%,80% 75.4%,81% 74.45%,82% 73.4%,83% 72.25%,84% 71.05%,85% 69.8%,86% 68.55%,87% 67.35%,88% 66.2%,89% 65.2%,90% 64.3%,91% 63.55%,92% 63%,93% 62.65%,94% 62.5%,95% 62.55%,96% 62.8%,97% 63.3%,98% 63.9%,99% 64.75%,100% 65.7%);
}

.wrapper {
    position: relative;
    display: flex;
    align-items: center;
    flex-direction: column;
    z-index: 1;
    width: 80%;
    min-height: calc(100vh - 120px);
    margin: 0 auto;
    padding-top: 40px;
    padding-bottom: 60px;
    color: #fff;
}

header {
    margin: 10px 0 40px 0;
}

main {
    min-width: calc(100% - 40px);
    min-height: calc(100vh - 270px);
    background: #fff;
    padding: 20px;
    border-radius: 8px;
}

main > section {
    display: flex;
    align-items: flex-start;
    flex-wrap: wrap;
}

main > section::after {
     content: '';
     flex-grow: 999999999;
}

main > section img {
    position: absolute;
    top: 0;
    width: 100%;
    vertical-align: bottom;
    border-radius: inherit;
    box-shadow: 0 0 2px 0 #c4c4c4;
}

main > section > div:not(:last-child) {
    margin-right: 10px;
}

.ins-item-container {
    position: relative;
    border-radius: 8px;
    margin-bottom: 10px;
    background-color: violet;
    cursor: pointer;
}

.ins-item-container:hover::before, .ins-item-container:hover::after {
    position: absolute;
    display: flex;
    justify-content: center;
    z-index: 2;
    width: 100%;
    background: rgba(0, 0, 0, .7);
}

.ins-item-container:hover::before {
    top: 0;
    align-items: flex-end;
    height: calc(50% - 20px);
    content: attr(ins-name);
    border-top-left-radius: 8px;
    border-top-right-radius: 8px;
    font-size: 16px;
    padding-bottom: 20px;
}

.ins-item-container:hover::after {
    top: 50%;
    align-items: flex-start;
    height: 50%;
    content: '去看看';
    border-bottom-left-radius: 8px;
    border-bottom-right-radius: 8px;
    font-size: 14px;
    color: #8b8b8b;
}

footer {
    position: absolute;
    bottom: 0;
    padding: 20px 0 10px 0;
}

footer a {
    color: #fff;
}