body {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    width: 100%;
}

.container {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    height: auto;
    width: 100%;
}

.top_header{
    width: 100%;
    height: auto;
    display: block;
    position: sticky;
    top: 0;
    z-index: 99;
}

.btn_box{
    position: relative;
}

.down_btn_box{
    width: 90%;
    height: fit-content;
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
}

#down_btn_ic{
    display: block;
}

#down_btn_none{
    display: none;
}

.down_load_text{
    position: absolute;
    top:50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 16px;
    color: #fff;
}

.finger_ic{
    position: absolute;
    top: 45%;
    left: 75%;
    transform: translate(-50%, -50%);
    width: 35px;
    height: 33px;
    object-fit: contain;
    animation: shake 1s ease-in-out infinite;
}

@keyframes shake {
    0% {
        transform: translate(0);
    }
    25% {
        transform: translate(-1.5px) rotate(6deg);
    }
    50% {
        transform: translate(1.5px) rotate(0);
    }
    75% {
        transform: translate(-1.5px) rotate(6deg);
    }
    100% {
        transform: translate(1.5px) rotate(0);
    }
}

.btn_ic{
    width: 100%;
    height: auto;
    display: block;
    object-fit: contain;
}

#progress-btn{
    position: absolute;
    top: 0;
    left: 0;
    width: 0%;
    height: 100%;
    background: rgb(0, 0, 0,20%);
    border-radius: 8px;
    max-width: 100%;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}


.install_button_text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 16px;
    color: #fff;
    /* 调整文本位置 */
}