body {
    min-height: 100vh;
    background: url("../images/enter.jpg") no-repeat center center;
    background-size: cover;
}

.header {
    position: relative;
    z-index: 999;
}

.enter {
    position: absolute;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.enter li {
    width: clamp(210px, 3.15rem, 3.15rem);
    height: clamp(380px, 5.14rem, 5.14rem);
    margin: 0 0.28rem;
    background: url("../images/enter1.png") no-repeat;
    background-size: cover;
    border-radius: 20px;
    overflow: hidden;
}

.enter li:nth-of-type(2) {
    background-image: url("../images/enter2.png");
}

.enter li:nth-of-type(3) {
    background-image: url("../images/enter3.png");
}

.enter li a {
    display: block;
    height: 100%;
    text-decoration: none;
    padding: clamp(25px, 0.5rem, 0.5rem) clamp(15px, 0.3rem, 0.3rem);
    box-sizing: border-box;
}

.enter li a h2 {
    font-size: clamp(20px, 0.4rem, 0.4rem);
    color: #064AAD;
}

.enter li a p {
    color: #666;
    font-size: clamp(14px, 0.15rem, 0.15rem);
    margin: 0.5em 0 1em;
    height: 6em;
    line-height: 1.5em;
    text-align: justify;
}

.enter li a span {
    display: inline-flex;
    color: #fff;
    font-weight: bold;
    font-size: clamp(14px, 0.16rem, 0.16rem);
    padding: 8px clamp(15px, 0.26rem, 0.26rem);
    background: #064AAD;
    border-radius: 3px;
}

.enter li a:hover span {
    background: orangered;
}