.desktop {
    color: #fff;
    width: 100%;
    height: 100%;
    font-size: 0px;
    overflow: hidden;
}

* {
    -webkit-user-drag: none;
    box-sizing: border-box;
}

.desktop .fixed-bg {
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
    object-fit: cover;
}

.desktop .fixed-bg * {
    object-fit: cover;
}

.content {
    padding: 20px;
    display: flex;
    justify-content: space-between;
    flex-direction: column;
    height: 100%;
    overflow: hidden;
}

.top {
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 999;
}

.desktop .contact {
    --corner-length: 1vw;
    --corner-thickness: 0.2vw;
    --corner-offset: 0.3vw;
    display: flex;
    align-items: center;
    gap: 2vw;
    margin-right: 2vw;
    position: relative;
    padding: 0.8vw 1.6vw;
    background: rgba(255, 255, 255, 0.08);
}

/* 使用伪元素绘制左右红色角标 */
.contact::before,
.contact::after {
    content: "";
    position: absolute;
    inset: calc(-1 * var(--corner-offset));
    pointer-events: none;
    z-index: 0;
}

/* 确保按钮图标在伪元素之上显示 */
.desktop .contact>img {
    position: relative;
    z-index: 1;
    width: 6vw;
    cursor: pointer;
}

.contact::before {
    /* 左侧四个角标（上、左；下、左） */
    background:
        linear-gradient(#ff2847, #ff2847) top left / var(--corner-length) var(--corner-thickness) no-repeat,
        linear-gradient(#ff2847, #ff2847) top left / var(--corner-thickness) var(--corner-length) no-repeat,
        linear-gradient(#ff2847, #ff2847) bottom left / var(--corner-length) var(--corner-thickness) no-repeat,
        linear-gradient(#ff2847, #ff2847) bottom left / var(--corner-thickness) var(--corner-length) no-repeat;
}

.contact::after {
    /* 右侧四个角标（上、右；下、右） */
    background:
        linear-gradient(#ff2847, #ff2847) top right / var(--corner-length) var(--corner-thickness) no-repeat,
        linear-gradient(#ff2847, #ff2847) top right / var(--corner-thickness) var(--corner-length) no-repeat,
        linear-gradient(#ff2847, #ff2847) bottom right / var(--corner-length) var(--corner-thickness) no-repeat,
        linear-gradient(#ff2847, #ff2847) bottom right / var(--corner-thickness) var(--corner-length) no-repeat;
}

.slg {
    position: absolute;
    top: 3vw;
    width: 90%;
    left: 50%;
    transform: translateX(-50%);
    object-fit: contain;
}

.bottom {
    flex: 1;
    display: flex;
    justify-content: space-around;
    align-items: center;
    overflow: hidden;
}

.main-left {
    height: 100%;
    flex: 1;
    display: flex;
    flex-direction: column;
}


.downloadArea {
    position: absolute;
    bottom: 0;
    width: 93%;
    align-items: center;
}

.downloadArea .title-wrap {
    position: relative;
    display: block;
    width: 85vw;
    margin-left: 5vw;
}

.downloadArea .title {
    display: block;
    width: 100%;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

/* 将除第一张外的标题图层叠加到容器上 */
.downloadArea .title-wrap .title:not(:first-child) {
    position: absolute;
    inset: 0;
}

.downloadArea .title.active {
    opacity: 1;
}

.downloadArea .qr-wrap {
    position: absolute;
    inset: 0;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2;
}

.downloadArea .qrcode {
    width: 100%;
    display: block;
}

.downloadArea .qrcode-box {
    position: relative;
    right: 1vw;
    z-index: 2;
    font-size: 0;
    display: inline-block;
    width: 160px;
    height: 160px;
    box-sizing: border-box;
    border: 5px solid #d1474e;
    border-radius: 8px;
}

.inside {
    background: #fff;
    height: 100%;
}


.btn-right {
    margin-left: 2vw;
}

#qrcode img {
    visibility: visible !important;
}

.btn-box {
    display: flex;
    align-items: center;
    flex-direction: column;
    justify-content: space-around;
}

.btn-box .btn {
    display: inline-block;
    border: none;
    outline: none;
    cursor: pointer;
    transition: all .3s ease;
    background: transparent;
    font-size: 24px;
}

.btn-box img {
    width: 100%;
}

.btn-box .btn:hover {
    transform: translateY(-4px) scale(1.05)
}


.image-container .image-fade {
    object-fit: contain;
    opacity: 0;
    transition: opacity 1s ease-in-out;
}

.image-container .image-fade.active {
    opacity: 1;
}