/* ===================== 首页专属样式 ===================== */
/* 主背景区域 */
.main-section {
    width: 100%;
    height: 100vh;
    background: url("../Img/Home/ST.png") no-repeat center center;
    background-size: cover;
    position: relative;
}

/* 二维码下载区 */
.download-qr {
    position: absolute;
    top: 20%;
    right: 20%;
    text-align: center;
}

.download-qr .title {
    font-size: 20px;
    margin-bottom: 15px;
    text-shadow: 0 0 5px rgba(0,0,0,0.5);
}

.qr-frame {
    width: 136px;
    height: 132px;
    background: url("../Img/Home/QR.png") no-repeat center center;
    background-size: contain;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 适龄提示（仅首页） */
.age-tip {
    position: absolute;
    bottom: 8%;
    left: 10%;
    width: 88px;
    height: auto; 
}