body,
html {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang TC", "Microsoft JhengHei", Arial, sans-serif;
    overflow: hidden;
    color: #111827;
    background:
        linear-gradient(115deg, rgba(0, 122, 255, .24) 0%, rgba(0, 122, 255, .08) 34%, transparent 60%),
        linear-gradient(245deg, rgba(48, 209, 88, .20) 0%, rgba(48, 209, 88, .08) 38%, transparent 64%),
        linear-gradient(165deg, transparent 24%, rgba(255, 159, 10, .18) 52%, transparent 76%),
        linear-gradient(135deg, #fcfeff 0%, #eaf4ff 52%, #f3fbf5 100%);
}

.app-download-page {
    position: relative;
    width: 100%;
    height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    perspective: 1000px;
}

.background-animation {
    position: absolute;
    inset: 0;
    z-index: 0;
    overflow: hidden;
}

.bg-icon {
    position: absolute;
    opacity: 0.16;
    animation-name: conveyorBelt;
    animation-timing-function: linear;
    animation-iteration-count: infinite;
    will-change: transform;
}

.bg-icon img {
    display: block;
    width: 100%;
    height: 100%;
    border-radius: 18px;
    filter: saturate(1.08);
    box-shadow: 0 12px 34px rgba(35, 65, 95, .16);
}

@keyframes conveyorBelt {
    0% {
        transform: translateY(-150px);
    }
    100% {
        transform: translateY(calc(100vh + 150px));
    }
}

.bg-icon.up {
     animation-name: conveyorBeltUp;
}

@keyframes conveyorBeltUp {
    0% {
        transform: translateY(calc(100vh + 150px));
    }
    100% {
        transform: translateY(-150px);
    }
}

.content {
    position: relative;
    z-index: 1;
    width: min(88vw, 430px);
    padding: clamp(28px, 6vw, 44px);
    text-align: center;
    background:
        linear-gradient(135deg, rgba(255, 255, 255, .34), rgba(255, 255, 255, .08) 38%, rgba(0, 122, 255, .05) 72%, rgba(27, 53, 80, .05)),
        rgba(255, 255, 255, .42);
    border: 1px solid rgba(255, 255, 255, .92);
    border-radius: 28px;
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    box-shadow:
        0 24px 64px rgba(35, 65, 95, .16),
        inset 0 1px 0 rgba(255, 255, 255, .96),
        inset 1px 0 0 rgba(255, 255, 255, .72),
        inset 0 -1px 0 rgba(27, 53, 80, .09);
}

.main-app-icon {
    width: 116px;
    height: 116px;
    border-radius: 26px;
    margin: 0 auto 24px;
    box-shadow: 0 16px 36px rgba(35, 65, 95, .18);
    display: block;
}

h1 {
    margin: 0 0 10px;
    font-size: clamp(30px, 7vw, 42px);
    line-height: 1.12;
    letter-spacing: 0;
    color: #111827;
}

p {
    margin: 0 0 28px;
    font-size: 17px;
    color: #667085;
}

.download-btn {
    min-height: 52px;
    padding: 12px 30px;
    border: none;
    border-radius: 999px;
    color: #ffffff;
    background: linear-gradient(135deg, #007aff, #30d158);
    font-size: 17px;
    font-weight: 800;
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease;
    box-shadow: 0 14px 32px rgba(0, 122, 255, .18);
}

.download-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 18px 38px rgba(0, 122, 255, .22);
}

.download-btn:active {
    transform: translateY(0);
}