Hi hanane,
Set the template layout the ( maximum width by 100% instead numerous number of px ) for those images intact well on various screen.
The maximum template width enable the Images to properly fit within the layout ( .container )
You can apply the CSS fix at templates/wanderers/css/theme.css
/* Template Maximum Width */
.container {
width: 100% !important;
}
Do update us whether does this help you out?