html,
body {
    margin: 0;
    padding: 0;
    font-family: "Microsoft YaHei", "Helvetica Neue", "Helvetica", "Arial", "STXihei", "sans-serif";
    height: 100vh;
    max-height: 100vh;
    width: 100%;
    background-size: cover;
    box-sizing: border-box;
    overflow: hidden;
    font-size: 16px;
    background: #d9e1e9;
}

a {
    text-decoration: none;
    transition: 0.2s;
}

p {
    margin: 0;
}

ul {
    padding: 0;
    margin: 0;
}

img {
    line-height: 0;
    font-size: 0;
    margin: 0;
    padding: 0;
}

.w750 {
    width: min(100%, 750px);
    margin: 0 auto;
    background: #fff;
    height: 100vh;
    position: relative;
    text-align: center;
}

.server {
    position: absolute;
    right: min(3vw,30px);
    top: min(3vw,30px);
    z-index: 5;
}
.server img{
    width: min(15vw,80px);
}


.grid {
    height: 100%;
    display: grid;
    grid-template-rows: 80% -10%;
    text-align: center;
}

.grid01 {
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    transform: translateY(30px);
}

.grid01 img {
    width: min(80vw, 400px);
    display: block;
    margin: 0 0 min(3vh,20px);
}
.grid01 span{
    color: #253659;
    font-size: min(5.5vw, 1.4rem);
    letter-spacing: min(.5vw, 1px);
}


.btn {
    margin: 0 auto;
    display: block;
    width: 80%;
    background: linear-gradient(#143cdb, #069bf4);
    padding: min(3vh,20px) 0;
    font-size: min(5.5vw, 1.4rem);
    color: #fff;
    border-radius: 5px;
    letter-spacing: min(.4vw, 2px);
}
.btn2 {
    margin: 0 auto;
    display: block;
    width: 80%;
    background: linear-gradient(#143cdb, #069bf4);
    padding: min(3vh,20px) 0;
    font-size: min(5.5vw, 1.4rem);
    color: #fff;
    border-radius: 5px;
    letter-spacing: min(.4vw, 2px);
}
.btn1 {
    margin: 0 auto;
    display: block;
    width: 80%;
    background: linear-gradient(#143cdb, #069bf4);
    padding: min(3vh,10px) 0;
    font-size: min(5.5vw, 1.4rem);
    color: #fff;
    border-radius: 5px;
    letter-spacing: min(.4vw, 2px);
}



@media screen and (max-width: 500px) {

}