/* 商店购买与兑换统一为金色；免费奖励保持绿色。 */
#shopOverlay .shop-grid .shop-buy-btn:not(.shop-reward-btn):not(:disabled) {
    min-width: 76px;
    border: 1px solid #f0d590 !important;
    background: linear-gradient(120deg, #efd695, #bc9657) !important;
    color: #271d0d !important;
    -webkit-text-fill-color: currentColor !important;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.48), 0 3px 9px rgba(0, 0, 0, 0.26) !important;
}

#shopOverlay .shop-grid .shop-buy-btn.shop-reward-btn:not(:disabled) {
    min-width: 84px;
    border: 1px solid #76c99a !important;
    background: linear-gradient(120deg, #215c3e, #2c7850) !important;
    color: #effff3 !important;
    -webkit-text-fill-color: currentColor !important;
    box-shadow: inset 0 1px 0 rgba(223, 255, 233, 0.17), 0 3px 9px rgba(0, 0, 0, 0.3) !important;
}

#shopOverlay .shop-grid .shop-buy-btn:not(:disabled):hover {
    filter: brightness(1.1);
}