html, body {
    scroll-behavior:smooth; 
    overflow-x:hidden;
    color: #000000;
}
a:hover{
    text-decoration:none
}
.main_title{
    font-size: 40px;
    font-family: Roboto-Black;
    font-weight: normal;
    color: #333333;
    text-align: center;
}
.main_title img{
    margin-bottom: 10px;
}
.title_img{
    margin: 15px auto;
}

/* 导航栏 */
#header{
    padding: 20px 0;
    background: #ffffff;
}
#nov_none{
    display: none;
}
#header .bi-list{
    color: #0554aa;
    font-size: 40px;
}
#header .bi-x-lg{
    color: #0554aa;
    font-size: 40px;
}
#header button{
    position: absolute;
    right: 0;
    padding: 0 0 0 0 ;
    margin-right: 1%;
    border:unset;
}
#header .navbar{
    margin: 0px auto;
    justify-content: space-between; 
}
#header .logo{
    margin-right: 0;
    text-align: center;
}
#header .logo img{
    padding: 8px 0;
}
#header li{
    padding: 0 5px;
}
#header li a{
    letter-spacing: 1px;
    font-size: 20px;
    font-family: PingFang SC, PingFang SC-Medium;
    font-weight: 500;
    text-align: left;
    color: #666666;
    letter-spacing: -0.4px;
}
#header li a::after{
    height: 2px;
    bottom: -2px;
    background-color: #0554aa;
    content: "";
    display: block;
    transition: all .3s ease;
    transform-origin: center;
    width: 0%;
}
#header li.active a{
    color: #0554aa;
}
#header li.active a::after{
    color: #0554aa;
    width: 100%;
}
#header li:hover a{
    color: #0554aa;
    cursor:pointer;
}
#header li:hover a::after{
    width: 100%;
}
.dropdown-item:hover{
    background-color:none;
    background-color: #fefefe;  
}
@media screen and (max-width: 991px) {
    #header .logo{
        margin-right: -6px;
        text-align: left;
    }
    #nov_none{
        display: block;
    }
    #navbarSupportedContent{
        text-align: left;
        background-color: #ffffff;
        position: absolute;
        top: 100%;
        right: 0;
        max-width: 200px;
    }
}
/* home  */
#home{
    padding-top: 100px;
}
#home .heading_bg{
    background-image: url('../images/banner_01.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
#home .heading{
    padding: 200px 0;
}
#home .heading h1 {
    font-size: 90px;
    font-family: Roboto-Black;
    font-weight: 500;
    text-align: center;
    color: #ffffff;
    letter-spacing: -2.8px;
}
#home .heading .title {
    font-size: 30px;
    font-family: Roboto-Black;
    font-weight: 400;
    text-align: center;
    color: #ffffff;
    margin-bottom: 0px;
}
@media screen and (max-width: 991px) {
    #home{
        padding: 100px 0px 0;
    }
}
@media screen and (max-width: 767px) {
    #home .heading h1 {
        font-size: 60px;
    }
    #home .heading .title {
        font-size: 56px;
    }
}
@media screen and (max-width: 600px) {
    #home .heading h1 {
        font-size: 40px;
    }
    #home .heading .title {
        font-size: 36px;
    }
    #home .heading .content {
        font-size: 16px;
    }
}
@media screen and (max-width: 411px) {
    #home .heading h1 {
        font-size: 32px;
    }
    #home .heading .title {
        font-size: 28px;
    }
}

/* product  */
#product .content_bg{
    background-image: url('../images/bg_02.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
#product .content{
    width: fit-content;
    margin: auto;
}
#product .content_bg{
    padding: 150px 0px;
}
#product .content_bg h1{
    font-size: 26px;
    font-family: Roboto-Black;
    font-weight: 500;
    text-align: center;
    color: #0554aa;
    padding: 0px 15px;
}
#product .content .box{
    display: flex;
}
#product .content .box img{
    height: 30px;
    width: auto;
    margin-right: 20px;
}
#product .content p{
    font-size: 22px;
    font-family: Myriad Pro, Myriad Pro-Regular;
    font-weight: 400;
    text-align: left;
    color: #666666;
    margin-bottom: 35px;
}


/* somnoMetry */
#somnoMetry .somnoMetry_bg{
    padding: 100px 0 60px;
    background-image: url('../images/bg_somno_metry.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
#somnoMetry .content{
    margin: 20px auto;
}
#somnoMetry .content p{
    font-size: 18px;
    font-family: Roboto-Black;
    font-weight: Regular;
    text-align: left;
    color: #666666;
    margin-bottom: 20px;
}
#somnoMetry .content p span{
    font-size: 20px;
    font-family: Roboto-Black;
    font-weight: Bold;
    text-align: left;
    color: #333333;
}


/* cardioMetry */
#cardioMetry .cardioMetry_bg{
    padding: 100px 0 0px;
    background-image: url('../images/bg_cardio_metry.png');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: right;
}
#cardioMetry .content{
    margin: 20px auto;
}
#cardioMetry .content p{
    font-size: 18px;
    font-family: Roboto-Black;
    font-weight: Regular;
    text-align: left;
    color: #666666;
    margin-bottom: 20px;
}
#cardioMetry .content p span{
    font-size: 20px;
    font-family: Roboto-Black;
    font-weight: Bold;
    text-align: left;
    color: #333333;
}

/* platform */
#platform .platform_bg{
    padding: 100px 0 40px;
    background-image: url('../images/bg_platform.jpg');
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}
#platform .platform_bg h2{
    font-size: 30px;
    font-family: Roboto-Black;
    font-weight: 500;
    text-align: center;
    color: #0554aa;
    margin-bottom: 40px;
}
#platform .content h1{
    font-size: 22px;
    font-family: Roboto-Black;
    font-weight: 700;
    text-align: left;
    color: #333333;
}
#platform .content p{
    font-size: 16px;
    font-family: Roboto-Black;
    font-weight: Regular;
    text-align: left;
    color: #666666;
}
#platform .content .box{
    display: flex;
}
#platform .content .box img{
    margin-top: 5px;
}
#platform .content .box p{
    margin-left: 20px;
}

/* about */
#about .about_bg{
    padding: 120px 0;
    background-image: url('../images/bg_about.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
#about .content{
    border-radius: 14px;
    background-color: #ffffff;
    z-index: 1;
    padding: 150px 60px;
}
#about .content p{
    font-size: 18px;
    font-family: Roboto-Black;
    font-weight: Regular;
    text-align: left;
    color: #666666;
    margin-bottom: 20px;
}
#about .content p span{
    font-size: 20px;
    font-family: Roboto-Black;
    font-weight: Bold;
    text-align: left;
    color: #333333;
}

/* Mission */
#mission .mission_bg{
    padding: 130px 0;
    background-image: url('../images/bg_mission.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
#mission .content{
    width: 50%;
}
#mission .title{
    font-size: 44px;
    font-family: Roboto-Black;
    font-weight: normal;
    color: #333333;
    line-height: 48px;
    margin-bottom: 30px;
}
#mission p{
    font-size: 24px;
    font-family: Roboto-Black;
    font-weight: 400;
    text-align: left;
    color: #333333;
}
@media screen and (max-width: 991px) {
    #mission .content{
        width: auto;
    }
}

/* contact */
#contact .contact_bg{
    padding: 100px 0;
    background-image: url('../images/bg_contact.jpg');
    background-size: cover;
    background-repeat: no-repeat;
    background-position: center;
}
#contact .box{
    height: 275px;
    width: calc(33% - 30px);;
    margin: 15px;
    border: #f3f3f3 2px solid;
    text-align: center;
}
#contact .box img{
   margin: 25px auto;
}
#contact .box h1{
    font-size: 20px;
    font-family: Roboto-Black;
    font-weight: 700;
    text-align: center;
    color: #0554aa;
    margin-bottom: 20px;
}
#contact .box p,
#contact .box a{
    font-size: 16px;
    font-family: Roboto-Black;
    font-weight: 500;
    text-align: center;
    color: #666666;
    margin-bottom: 4px;
}
#contact .box a:hover{
    color: #0555aa;
}
@media only screen and (max-width: 992px) {
    #contact .box{
        width: calc(50% - 30px);
    }
}
@media only screen and (max-width: 577px) {
    #contact .box{
        width: calc(100% - 30px);
    }
}

/* footer */
footer{
    background: #0555aa;
}
.footer p {
    font-size: 16px;
    font-family: Roboto-Black;
    font-weight: 400;
    margin: auto;
    padding: 8px 0;
    text-align: center;
    color: #ffffff;
}