.font12 {font-size: 12px;}
.font13 {font-size: 13px;}
.font14 {font-size: 14px;}
.font15 {font-size: 15px;}
.font16 {font-size: 16px;}
.font17 {font-size: 17px;}
.font18 {font-size: 18px;}
.font19 {font-size: 19px;}
.font20 {font-size: 20px;}
.font22 {font-size: 22px;}
.font23 {font-size: 23px;}
.font24 {font-size: 24px;}
.font26 {font-size: 26px;}
.font28 {font-size: 28px;}
.font30 {font-size: 30px;}
.font32 {font-size: 32px;}
.font34 {font-size: 34px;}
.font36 {font-size: 36px;}
.font38 {font-size: 38px;}
.font40 {font-size: 40px;}
.font42 {font-size: 42px;}
.font44 {font-size: 44px;}
.font45 {font-size: 45px;}
.font46 {font-size: 46px;}
.font48 {font-size: 48px;}
.font50 {font-size: 50px;}
.font52 {font-size: 52px;}
.font54 {font-size: 54px;}
.font56 {font-size: 56px;}
.font58 {font-size: 58px;}
.font60 {font-size: 60px;}
.font64 {font-size: 64px;}
.font66 {font-size: 66px;}
.font68 {font-size: 68px;}
.font70 {font-size: 70px;}
.font72 {font-size: 72px;}
.font77 {font-size: 77px;}
.font80 {font-size: 80px;}
.font90 {font-size: 90px;}
.font100 {font-size: 100px;}
.font110 {font-size: 110px;}
.font120 {font-size: 120px;}
.font130 {font-size: 130px;}
.font140 {font-size: 140px;}
.font160 {font-size: 160px;}
.font260 {font-size: 260px;}
.font280 {font-size: 280px;}
.font300 {font-size: 300px;}
.font400 {font-size: 400px;}
.flh14 {line-height: 14px;}
.flh20 {line-height: 20px;}
.flh22 {line-height: 22px;}
.flh24 {line-height: 24px;}
.flh26 {line-height: 26px;}
.flh28 {line-height: 28px;}
.flh30 {line-height: 30px;}
.flh32 {line-height: 32px;}
.flh34 {line-height: 34px;}
.flh36 {line-height: 36px;}
.flh40 {line-height: 40px;}
.flh42 {line-height: 42px;}
.flh44 {line-height: 44px;}
.flh48 {line-height: 48px;}
.flh50 {line-height: 50px;}
.flh52 {line-height: 52px;}
.flh54 {line-height: 54px;}
.flh56 {line-height: 56px;}
.flh58 {line-height: 58px;}
.flh60 {line-height: 60px;}
.flh64 {line-height: 64px;}
.flh70 {line-height: 70px;}
.flh72 {line-height: 72px;}
.flh75 {line-height: 75px;}
.flh80 {line-height: 80px;}
.flh90 {line-height: 90px;}
.flh140 {line-height: 140px;} 
.flh160 {line-height: 160px;} 
.flh260 {line-height: 260px;} 
.flh400 {line-height: 400px;} 
 


 

 
body,a,input,select,textarea {font-family: 'BwModelica-r','Noto Sans SC','Source Han Sans CN',"Source Han Sans",PingFang SC,-apple-system,Arial,sans-serif,Helvetica,system-ui,Segoe UI,Roboto,Ubuntu,Noto Sans;}
h1,h2,h3,h4,h5,h6,strong{font-weight: bold;margin: 0;padding: 0;font-family: 'BwModelica-b';} 


/* fonts */
@font-face {font-family: 'BwModelica-b';src: url('../font/BwModelica-Bold.otf');font-weight: normal;font-style: normal;} 
@font-face {font-family: 'BwModelica-m';src: url('../font/BwModelica-Medium.otf');font-weight: normal;font-style: normal;} 
@font-face {font-family: 'BwModelica-r';src: url('../font/BwModelica-Regular.otf');font-weight: normal;font-style: normal;}  

 
.header-nav a,.header-link .link-1 a span ,.scrolldown-1 a span,.learnmore-1 a span,.index-simple-steps-item .title-1 i,.ess-return a span,.ess-page-download-top .results-1 span,
.ess-certification-and-qualification-top .item-1 li a,.ess-page-from .title-2,.ess-page-from .submit-1 a,.ess-page-for-installer-right .title-2 i,.mobile-nav-list ul li a.nav-1,
.index-application-pic .text-1 span,.index-doubt-nav ul li span,.index-doubt-nav ul li i,.ess-product-section-style4 .ess-product-section-left .item-2 li{font-family: 'BwModelica-b';}
.index-doubt-item .text-1 ,.ess-product-text .text-2,.ess-product-section-img .text-2,
.ess-product-section-style4 .ess-product-section-left .text-2,.ess-product-section-style5 .ess-product-section-left .text-2{font-family: 'BwModelica-m';}
.ess-product-section-text .text-3 strong ,.ess-product-section-fullpic .text .text-2 strong {font-family: 'BwModelica-r';font-weight: normal;}
  



@media screen and (max-width: 5120px) { 
	 
}
@media screen and (max-width: 3840px) { 
	  
}
@media screen and (max-width: 2560px) {	
	
}
@media screen and (max-width: 2048px) {

}
@media screen and (max-width: 1920px) {	
	  
}
@media screen and (max-width: 1680px) {
	
}
@media screen and (max-width: 1440px) {
    .font44 {font-size: 34px;}
    .font30 {font-size: 26px;}
    .font24 {font-size: 20px;}
    .font20 {font-size: 18px;}
    .font18 {font-size: 16px;}
    .font16 {font-size: 14px;}
    .font14 {font-size: 12px;}
    .font60 {font-size: 50px;}
    .font66 {font-size: 56px;}
    .font140 {font-size: 110px;}
    .flh70 {line-height: 60px;}
    .flh34 {line-height: 30px;}
}
@media screen and (max-width: 1366px) { 

}
@media screen and (max-width: 1280px) {  
}
@media screen and (max-width: 1152px) { 
}
@media screen and (max-width: 1024px) { 
}
@media screen and (max-width: 980px) {  
}