:root {
    /*font-size*/
    --head:clamp(2rem, 3.8709677419vw, 4.8rem);
    --second-head:clamp(1.8rem, 1.935483871vw, 2.4rem);
    --third-head:clamp(1.6rem, 1.7vw, 2rem);
    --recommend:clamp(2rem,2.5vw, 3rem);
    --desc:clamp(1.5rem, 1.2903225806vw, 1.6rem);
    --txt:clamp(1.5rem, 1.2903225806vw, 1.6rem);
    /*color*/
    --primary:#E6ECEF;
    --white:#fff;
}