* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft YaHei", "SimHei", sans-serif;
}

body {
    background-color: #f5e9d8;
    background-image: url("data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAADIAAAAyCAMAAAAp4XiDAAAAUVBMVEWFhYWDg4N3d3dtbW17e3t1dXWBgYGHh4d5eXlzc3OLi4ubm5uVlZWPj4+NjY19fX2JiYl/f39ra2uRkZGZmZlpaWmXl5dvb29xcXGTk5NnZ2c4zIwLAAAAG3RSTlNAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQEBAQECAgICAgICAgICAgMDAwUFBQUFBPj4+Pj4+Pj4+Pj4+Pj4+Pj4+Pj4+Pv/bAAEEAQEBAQEBAAAAEBAQAAAgFgAAAKCggABAAAAAQAAABoAAAD5/wAAACcQAAAADAAAAAQAAABgAAAAMAgUAAACBgACAgIAAgID/4gIc5hJ+N5AAAAATklEQVQ4jWNgGAWjYBSMAggAAAQQAAGFH4z8AAAAASUVORK5CYII=");
    color: #5a2e18;
    line-height: 1.6;
    padding-bottom: 30px;
}

.main_box {
    width: 95%;
    max-width: 640px;
    margin: 0 auto;
    padding: 10px;
}

.top_box {
    text-align: center;
    margin: 15px 0;
}

.logo_img {
    width: 100%;
    max-width: 500px;
    height: auto;
    border: 3px solid #8b4513;
    border-radius: 8px;
    box-shadow: 0 3px 8px rgba(0,0,0,0.2);
}

.play_btn {
    display: block;
    width: 80%;
    height: 60px;
    line-height: 60px;
    margin: 20px auto;
    background: linear-gradient(#d48806, #b76e00);
    color: #fff;
    text-align: center;
    text-decoration: none;
    font-size: 22px;
    font-weight: bold;
    border: 2px solid #8b4513;
    border-radius: 30px;
    text-shadow: 1px 1px 2px #5a2e18;
    box-shadow: 0 4px 0 #8b4513;
    transition: all 0.2s ease;
}

.play_btn:active {
    box-shadow: 0 2px 0 #8b4513;
    transform: translateY(2px);
}

.info_card, .update_card {
    background-color: #fff8e8;
    border: 2px solid #8b4513;
    border-radius: 8px;
    padding: 15px;
    margin: 25px 0;
}

.card_title {
    text-align: center;
    color: #8b0000;
    font-size: 20px;
    margin-bottom: 10px;
    border-bottom: 1px dashed #8b4513;
    padding-bottom: 8px;
}

.info_card p {
    font-size: 16px;
    margin-bottom: 8px;
    text-indent: 2em;
}

.update_item {
    margin-bottom: 12px;
    border: 1px solid #d2b48c;
    border-radius: 5px;
    overflow: hidden;
}

.item_title {
    background: linear-gradient(#8b4513, #5a2e18);
    color: #fff;
    padding: 10px 15px;
    font-size: 16px;
    font-weight: bold;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.down_icon {
    font-size: 18px;
    transition: transform 0.3s ease;
}

.item_cont {
    padding: 0 15px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    background-color: #fff;
}

.item_cont.show {
    padding: 15px;
    max-height: 2000px;
}

.item_cont p {
    margin-bottom: 8px;
    font-size: 15px;
}

@media (max-width: 375px) {
    .play_btn {
        height: 50px;
        line-height: 50px;
        font-size: 18px;
    }
    .info_card p, .item_cont p {
        font-size: 14px;
    }
    .card_title {
        font-size: 18px;
    }
}