*{margin: 0; padding: 0; box-sizing: border-box;}
a{color: inherit; text-decoration: none;}
.block{width: 100%; height: 100vh; background-image: url(https://ioi-e-group-1308616072.cos.ap-chengdu.myqcloud.com/metro/images/bg.png); background-size: cover; }
.block .content-box{ width: 50%; height: 100%; padding-top: 100px; float: right;}
.logo{ width: 565px; display: block; margin: 0 auto}
.steam-btn{ width: 495px; height: 80px; background-image: url(https://ioi-e-group-1308616072.cos.ap-chengdu.myqcloud.com/metro/images/steam-btn-bg.png); background-size: 100% 100%; margin: 0 auto; margin-top: 25px; display: flex; align-items: center; justify-content: center; font-size: 40px; font-weight: bold;}
.steam-btn img{ width: 50px; margin-right: 5px;}
.video-box{ width: 640px; height: 362px; background-image: url(https://ioi-e-group-1308616072.cos.ap-chengdu.myqcloud.com/metro/images/video-box-bg.png); margin: 0 auto; margin-top: 35px; display: flex; align-items: center; justify-content: center;}
.video-box iframe{ width: 95%; height: 95%;}
.platforms{ width: 560px; display: block; margin: 0 auto; margin-top: 40px;}
.mobile-show{display: none !important;}

@media (min-width: 769px) {
    .block {
        height: auto;
        min-height: 100vh;
        min-height: 100dvh;
        display: flex;
        justify-content: flex-end;
        background-position: center center;
        background-repeat: no-repeat;
    }

    .block .content-box {
        --content-width: min(640px, calc(50vw - 48px), 68vh);
        float: none;
        width: 50%;
        height: auto;
        padding: clamp(24px, 6vh, 100px) 24px 24px;
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .logo {
        width: calc(var(--content-width) * 0.883);
        height: auto;
        flex: none;
    }

    .content-box > a {
        display: block;
        width: calc(var(--content-width) * 0.774);
        margin-top: clamp(12px, 2.3vh, 25px);
        flex: none;
    }

    .steam-btn {
        width: 100%;
        height: auto;
        min-height: 44px;
        aspect-ratio: 491 / 79;
        margin: 0;
        font-size: clamp(18px, 2.08vw, 3.7vh);
        line-height: 1.2;
    }

    .steam-btn img {
        width: 10%;
        height: auto;
        margin-right: 5px;
    }

    .video-box {
        width: var(--content-width);
        height: auto;
        aspect-ratio: 642 / 360;
        margin: clamp(14px, 3.2vh, 35px) auto 0;
        background-size: 100% 100%;
        background-repeat: no-repeat;
        position: relative;
        flex: none;
    }

    .video-box iframe {
        position: absolute;
        inset: 2.5%;
        width: 95%;
        height: 95%;
        border: 0;
        display: block;
    }

    .platforms {
        width: calc(var(--content-width) * 0.875);
        height: auto;
        margin: clamp(16px, 3.7vh, 40px) auto 0;
        flex: none;
    }
}


@media (min-width: 769px) and (max-width: 1440px) {
    .block .content-box {
        width: 54%;
        --content-width: min(640px, calc(54vw - 48px), 68vh);
        padding-top: clamp(24px, 5vh, 48px);
    }
}


@media (min-width: 769px) and (max-height: 800px) {
    .block .content-box { padding-top: 24px; padding-bottom: 20px; }
    .content-box > a { margin-top: 14px; }
    .video-box { margin-top: 18px; }
    .platforms { margin-top: 20px; }
}

@media (min-width: 769px) and (max-height: 650px) {
    .block .content-box { padding-top: 16px; padding-bottom: 16px; }
    .content-box > a { margin-top: 10px; }
    .video-box { margin-top: 12px; }
    .platforms { margin-top: 14px; }
}


@media (max-width: 768px) {
    .block{width: 100%; min-height: 100vh; background-image: url(https://ioi-e-group-1308616072.cos.ap-chengdu.myqcloud.com/metro/images/mobile-bg.png); background-size: 100% auto;background-repeat: no-repeat; background-color: #070c14; padding-top: 8.6vw;}
    .content-box{ width: 100% !important; float: none !important;}
    .logo{ width: 70vw;}
    .video-box{ width: 86vw; height: 48.5vw; background-size: 100% 100%; margin-top: 54.4vw;}
    .steam-btn{ width: 72.6vw; height: 12vw; font-size: 5.3vw; margin: 0 auto; margin-top: 3.4vw;}
    .steam-btn img{ width: 6.6vw;}
    .platforms{ width: 70vw; margin-top: 4vw;}
    .mobile-show{display: block !important;}
    .pc-show{display: none;}

}