h1 {
        font-size:4vw;
    }
    .textbox .intro_txt {
        font-size: 0.8vw;
        line-height: 1.7em;
        color: #FFF;
        padding: 1.2vw 0 0 0;
    }
    @media screen and (max-width:767px) {
        h1 {
            font-size:6vw;
            padding:1rem 0;
        }
        .textbox .intro_ti {
            padding: 2.4vw 2rem 2.4vw 0;
        }
        .connect_safety .connect_txt {
            font-size: 3.6vw;
        }
        .sec4_title,
        .sec5_title {
            text-align: center;
        }
        .sec6_inner .faq .question {
            font-size: 4.2vw;
        }
        .sec6_inner .faq .answer {
            font-size: 3.6vw;
        }
    }