/* General setting **************************/
:root{
    --primary-color: #4d8bfd;
    --secondary-color: #f5f6f9;
    --third-color: #f0f2f3;
    --light-color:#fff;
    --dark-color:#000;
}
html{
    font-size:16px;
}
body {  
    font-family: 'Segoe UI', 'Times New Roman', Times, serif,  sans-serif;
}
*{
    margin: 0;
    padding: 0;
}
.container, .container-fluid, .row{
    padding: 0;
}
*:focus {
    outline: none !important;
}
  /* header navigation menu section  ************/
.navbar-brand{
      padding: 0;
      margin-right: 3rem !important;
      display: flex;
      vertical-align: center;
      align-items: center;
}
.navbar-brand img{
      height: 40px;
}
header nav .navbar-brand span{
    font-size: 1.5rem;
    font-weight: 600;
}  
.navbar-nav .nav-item .nav-link{
    font-size: 1.2rem;
    font-weight: 600;
}
.navbar-light .navbar-nav .nav-link {
    color: var(--dark-color);
}
.navbar-light .navbar-nav .nav-link:focus, .navbar-light .navbar-nav .nav-link:hover, .navbar-light .navbar-nav .nav-link.active {
    color: var(--primary-color);
}
.header-lang a img{
    height: 24px;
}
.btn-outline-secondary {
    color: #6c757d;
    border-color:#9f9f9f;
}
.btn-outline-secondary:hover {
    background-color: #4cb7a5;
}
.btn-check:active+.btn-outline-secondary, .btn-check:checked+.btn-outline-secondary,
.btn-outline-secondary.active, .btn-outline-secondary.dropdown-toggle.show, .btn-outline-secondary:active {
    background-color:  #4cb7a5 !important;
}
/* hero section ***********************/
#hero-en, #hero-tr{    
    background-image: url("../img/bg-banner-en.png"); 
    background-size:contain;
    background-repeat: no-repeat;
    background-position: center top;
}
#hero-zh{    
    background-image: url("../img/bg-banner-zh.png");     
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center top;
}
.hero{
    position: relative; 
    height: 1200px; 
}
.hero-content{
    position: absolute;
    top: 36%;
    left: 16%;
}
.hero .hero-title{    
    color: var(--light-color);
    font-size: 4rem;
}
.hero .hero-text{ 
    color: var(--light-color);
} 
/* hero-btn setting ***********************/  
.hero .hero-btn-section .hero-btn-section-item{
    display: inline-block;
}
.hero .btn-hero{      
    padding: 0;
    background-color: transparent;
    border: none;     
}
.hero .btn-hero img{
    height: 50px;
    width: auto;
}
.hero .btn-active{
    transition: all .5s ease-in-out;
}
.hero .btn-active:hover{      
    transform: scale(1.05);
}
.hero .btn-passive{
      margin-top: 22px;
}
.hero .btn-passive span{
  color: var(--light-color);
  display: block;
}

.download-section{
    display: none;
    padding-top: 10px;
    padding-bottom: 10px;
}
.download-section .download-section-item .btn-hero img{
    height: 50px;
    width: auto;
  
}
.download-section .download-section-item .btn-passive span{
    display: block;     
}
/* about section *******************/
.about-item .about-title{
    margin-top: 4rem;
}
.about-img{
    display: block;
    margin: 0 auto;
}

/* section end *******************************/
#services{
    background-color: var(--third-color);
}
.service-icon-field{
    width: 80px;
    height: 80px;
    border-radius:50%;
    background-color: var(--light-color);
    margin: 0 auto;
    padding: 25px 25px;
}
.service-icon{    
    width: 30px;
    height: 30px;
    border-radius: 50%;
    background-color: #9f9f9f;
}



/* contact section *******************************/
#contact {
    background-color: var(--secondary-color);
    border-top: 2px solid #9f9f9f;
}
.contact-item p:first-child{
font-size: 1.2rem;
font-weight: 600;
margin-bottom: 10px;
}
/* media query - responsive ********************/

@media (max-width: 2000.98px) { 
    .container{
        width: 1320px;
    }
    .hero{    
        height: 1079px; 
    }  
}
@media (max-width: 1600.98px) { 
    .container{
        width: 1080px;
    }
    .hero{    
        height: 1079px;  
    }
    .hero-content{
        top: 30%;
        left: 16%;
    }
    .hero .hero-title{        
        font-size: 4rem;
    }
    .hero .hero-text{ 
        width: 400px;
    }    
}
@media (max-width: 1399.98px) { 
    .container{
        width: 900px;
    }
    .hero{    
        height: 900px; 
    }
    .hero-content{
        top: 28%;
        left: 16%;
    }
    .hero .hero-title{        
        font-size: 3.2rem;
    }
    .hero .hero-text{ 
        width: 320px;
    }
}

@media (max-width: 1199.98px) { 
    .container{
        width: 800px;
    }
    .hero{    
        height: 750px;  
    }
    .hero-content{
        top: 30%;
        left: 16%;
    }
    .hero .hero-title{        
        font-size: 3rem;
    }
    .hero .hero-text{ 
        width: 320px;
    }
}
@media (max-width: 991.98px) { 
    .container{
        width: 620px;
    }
    .hero{    
        height: 600px;  
    }
    .hero-content{
        top: 24%;
        left: 16%;
    }
    .hero .hero-title{        
        font-size: 2.4rem;
    }
    .hero .hero-text{ 
        width: 280px;
        font-size: .8rem;
        margin-bottom: 10px;
    }
    .hero .btn-passive{
        margin-left: 5px;    
    }    
    .hero .btn-hero img{
        height: 40px;
        width: auto;
    }
    .hero .btn-hero span{
        font-size: 14px;
    }
    .about-item .about-title{
        margin-top: 2.4rem;
    }
}
 @media (max-width: 767.98px) { 
    .container{
        width: 480px;
    }
    .hero{    
        height: 500px;
    }
    .hero-content{
        top: 26%;
        left: 16%;
    }
    .hero .hero-title{        
        font-size: 2rem;
    }
    .hero .hero-text{ 
        width: 240px;
        font-size: .7rem;
        margin-bottom: 0;
    }
   
    .hero .btn-hero img{
        height: 30px;
        width: auto;
    }
    .hero .btn-hero span{
        font-size: 10px;
    }
    .hero .btn-passive{
        margin-top: 16px;
    }

    #about .about-item h3, #about .about-item p{
        text-align: center;
    }
    footer p{
        font-size: 1rem;
    }
    footer small{
        font-size: 0.8rem;
    }
}
@media (max-width: 575.98px) { 
    .container{
        width: 400px;
    }
    .hero{    
        height: 300px;
    }
    .hero-content{
        top: 26%;
        left: 16%;
    }
    .hero .hero-title{        
        font-size: 2.4rem;
        margin-bottom: 0;
    }
    .hero .hero-text{ 
        width: 180px;
        font-size: 0.8rem;
        margin-bottom:0;
    }
    .hero-btn-section{
        display: none;
    }
    .download-section{
        display: block;
    }
   
}
@media (max-width: 480.98px) { 
    .container{
        width: 340px;
    }
    .hero{    
        height: 220px; 
    }
    .hero-content{
        top: 18%;
        left: 10%;
    }
    .hero .hero-title{        
        font-size: 2rem;
        margin-bottom: 0;
    }
    .hero .hero-text{ 
        width: 180px;
        font-size: 0.8rem;
        margin-bottom:0;
    }
}