html,
body {
    margin: 0;
    padding: 0;
    font-family: "Segoe UI", Arial, "Microsoft YaHei", 微软雅黑, sans-serif;
    height: 100dvh;
    width: 100%;
    background-size: cover;
    background: #0e0e0e;
    box-sizing: border-box;
    overflow: hidden;
}

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

p {
    margin: 0;
}

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

.w750 {
    width: min(100%, 750px);
    margin: 0 auto;
    height: 100%;
    position: relative;

}

.banner {
    width: 100%;
    max-height: 100vh;
    height: 100vh;
    overflow: hidden;
    object-fit: cover;
    background: url(../img/bg.jpg) top center no-repeat;
    background-size: 100% auto;
}


.main {
    top: 45%;
    position: fixed;
    text-align: center;
    transition: .5s;
    animation: fadeDown_In 1s;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    animation: fadeInDown 1s ease forwards;
}

@keyframes fadeInDown {
    0% {
        opacity: 0;
        margin-top: -20px;
    }

    100% {
        opacity: 1;
        margin-top: 0;
    }
}

.logo {
    position: relative;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    margin-bottom: min(10vw, 100px);
    box-shadow: 0 0 25px rgba(100, 255, 0, .5);
    border-radius: 50%;
    box-sizing: border-box;
    animation: circle .5s ease infinite alternate;
}

@keyframes circle {
    from {
        box-shadow: 0 0 25px rgba(100, 255, 0, .3);
    }

    to {
        box-shadow: 0 0 40px rgba(100, 255, 0, .4);
    }

}

.maskkit {
    mask: url(../img/logo1.png) 0 0/100%;
    box-sizing: border-box;
}

.scan-wrap {
    position: relative;
    overflow: hidden;
    display: flex;
    justify-content: center;
    flex-direction: column;
    align-items: center;
    border-radius: 50%;
}

.scan-wrap::after {
    content: "";
    position: absolute;
    inset: -30%;
    background: linear-gradient(115deg,
            rgba(255, 255, 255, 0) 30%,
            rgba(80, 255, 0, 0.0),
            rgba(255, 255, 255, 0) 70%);
    filter: blur(5px) brightness(1.2) contrast(1.1);
    animation: scan-wrap 1.5s infinite;
    transform: translateX(-20%);
}

@keyframes scan-wrap {
    to {
        transform: translateX(100%);
    }
}

.logo img {
    width: min(46vw, 280px);
    border-radius: 50%;
    box-shadow: 0 0 30px rgba(137, 255, 53, 0.8);
}

.btn {
    width: min(44vw, 260px);
    position: relative;
    border-radius: 2rem;
    background-color: #78df2c;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    font-size: 1.5rem;
    padding: .66rem 0;
    color: #000;
}

.btn :hover {
    animation: btn .4s ease forwards;
}

.btn img {
    width: min(50vw, 451px);
}

@keyframes btn {
    0% {
        filter: brightness(1);
    }

    50% {
        filter: brightness(1.2);
    }

    100% {
        filter: brightness(1);
    }
}

.btn span {
    color: #11295e;
    font-weight: bold;
    position: absolute;
    z-index: 1;
    left: 50%;
    transform: translateX(-50%);
    font-size: 2rem;
}


@media screen and (max-height: 900px) {
    .w750 {
        width: 500px;
    }

    .logo {
        margin-bottom: 40px;
    }

    .logo img {
        width: min(25vh, 354px);
    }

    .btn {
        width: min(25vh, 354px);
        box-sizing: border-box;
    }

    .container {
        padding: 12px;
    }


    .btn img {
        width: 30vh;
    }
}

@media screen and (max-width: 460px) {
    .w750 {
        width: min(100%, 750px);
    }

}

@media screen and (min-width: 750px) {
	html {
		zoom: 98%;
	}
}