Hello @NelsonTsai,
In order to make the Arrow style more visually prominent on mobile phones, we recommend that you copy and paste the following CSS code into XStore >> Theme Options >> Theme Custom CSS >> Global CSS. After doing so, please clear your browser cache and check back to your site. The result should look like the image provided at the following link: https://postimg.cc/FdZrYsZg.
@media(max-width: 767px){
.arrows-hovered>.swiper-container .swiper-custom-right, .arrows-hovered>.swiper-container .swiper-custom-left {
background-color: #000 !important;
color: #fff !important;
}
}
Please note that you can change the color code in the CSS as per your requirements.
Best Regards,
8Theme’s Team