.tuya-back-to-top-wrapper{position:fixed;bottom:var(--back-to-top-bottom-desktop, var(--tuya-space-8));right:var(--tuya-space-4);z-index:100;pointer-events:none;opacity:0;visibility:hidden;transform:translateY(12px) scale(.9);transition:opacity var(--tuya-transition-base),visibility var(--tuya-transition-base),transform var(--tuya-transition-base)}.tuya-back-to-top-wrapper.is-visible{pointer-events:auto;opacity:1;visibility:visible;transform:translateY(0) scale(1)}.tuya-back-to-top-btn{display:flex;align-items:center;justify-content:center;width:48px;height:48px;border:1px solid var(--tuya-color-stroke);border-radius:var(--tuya-radius-pill);background:var(--tuya-color-surface);color:var(--tuya-color-primary);box-shadow:var(--tuya-shadow-sm);cursor:pointer;transition:background-color var(--tuya-transition-fast),border-color var(--tuya-transition-fast),color var(--tuya-transition-fast),transform var(--tuya-transition-fast),box-shadow var(--tuya-transition-fast)}@media(hover:hover){.tuya-back-to-top-btn:hover{background:var(--tuya-color-primary);border-color:var(--tuya-color-primary);color:var(--tuya-color-text-light);transform:scale(1.05);box-shadow:var(--tuya-shadow-md)}}.tuya-back-to-top-btn:active{transform:scale(.98);box-shadow:var(--tuya-shadow-sm)}.tuya-back-to-top-btn svg{width:20px;height:20px;transition:transform var(--tuya-transition-fast)}@media screen and (max-width:1024px){.tuya-back-to-top-wrapper{bottom:var(--back-to-top-bottom-mobile, var(--tuya-space-5));right:var(--tuya-space-4)}}@media screen and (max-width:767px){.tuya-back-to-top-wrapper.hide-on-mobile{display:none!important}.tuya-back-to-top-btn{width:44px;height:44px}}@media(prefers-reduced-motion:reduce){.tuya-back-to-top-wrapper,.tuya-back-to-top-btn{transition:none!important}.tuya-back-to-top-btn:hover{transform:none!important}}
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