* {
    margin: 0;
    padding: 0;
    list-style: none;
}

a {
    text-decoration: none;
}

body {
    background: #fff;
}

.content {
    width: 340px;
    margin: 0 auto;
    margin-top: 3rem;
    border-radius: 10px;
    /* background: #fff; */
    overflow: hidden;
    border: 2px solid #ffffff;
    box-shadow: 4px 4px 12px #999999;
    text-align: center;
    line-height: 40px;
    padding-bottom: 4rem;
    color: #000;
}

.content h2 {
    margin-top: 3rem;
    /*letter-spacing: 3px;*/
}

.content h3 {
    margin-top: 1rem;
    font-size: 17px;
    letter-spacing: 3px;
}

.content p {
    font-weight: bold;
    font-size: 17px;
    /*letter-spacing: 2px;*/
}

.logo {
    width: 128px;
    height: 128px;
    margin: 0 auto;
    margin-top: 3rem;
}


.logo img {
    width: 100%;
}

.banner_btn {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
    width: fit-content;
    margin: 0 auto;
    margin-top: 2rem;
}

.banner_btn a {
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    align-items: center;
    width: 340px;
    height: 60px;
    background: linear-gradient(90deg, #d90b0b 0%, #0818dc 100%);
    border-radius: 15px;
    color: #fff;
    font-family: "Microsoft YaHei";
    font-size: 24px;
    font-style: normal;
    font-weight: 700;
    line-height: 100%;
    letter-spacing: 3px;
}


.banner_btn a i {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.2);
    animation: banner_diffusion 1.5s linear infinite;
}

.banner_btn a img {
    padding-right: 2px;
}

@keyframes banner_diffusion {
    0% {
        width: 0;
        height: 0;
    }

    100% {
        width: 700px;
        height: 700px;
    }
}