*{
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
.container{
    width: 100%;
    max-width: 1920px;
    margin: 0 auto;
}
.gradient{
    -webkit-text-fill-color: transparent;
    -webkit-background-clip: text;
    background-clip: text;
    background-image: linear-gradient(33deg,#ffc850,#ffdc50);
}
a{
    cursor: pointer;
    text-decoration: none;
    outline: none !important;
    color: #000;
}
strong{
    color: #363636;
    font-weight: 700;
}
html{
    font-size: 16px;
}
.emerge{
    animation: emerge 0.5s ease;
}
/* 公共动画 */
@keyframes emerge{
    0%{
        transform: translateY(50%);
        opacity: 0;
    }
    100%{
        transform: translateY(0);
        opacity: 1;
    }
}
/* 段落抬头 */
.section-title{
    text-align: center;
    font-weight: 600;
    width: 100%;
    
    font-size: 28px;
    padding: 20px 0;
    padding-bottom: 10px;
}
    .section-title > span{
        position: relative;
        display: inline-block;
        padding-bottom: 10px;
    }
    .section-title > span::after{
        content: '';
        position: absolute;
        width: 40%;
        height: 3px;
        border-radius: 99px;
        background-color: #ffdc32;
        left: 50%;
        bottom: 0;
        transform: translateX(-50%);
    }


/* titles */
.abouts-title{
    margin-bottom: 80px;
}
.abouts-title-p1{
    font-size: 42px;
    font-weight: 900;
    color: #dcdcdc;
    padding-top: 80px;
}
.abouts-title-p2-content{
    font-size: 18px;
    font-weight: 600;
    padding-bottom: 20px;
    position: relative;
    display: inline-block;
}
.abouts-title-p2-content::after{
    content: '';
    width: 100%;
    height: 4px;
    background-color: #ffd200;
    position: absolute;
    left: 0;
    bottom: 0;
}




/* banner */
#banner{
    height: 525px;
    width: 100%;
    background-image: url('../images/about-banner1.jpg');
    background-position: center center;
    background-size: 100% auto;
    background-repeat: no-repeat;
}
#banner > .container{
    width: 100%;
    height: 100%;
    max-width: 1344px;
    margin: 0 auto;
    padding: 0 12px;
}
.banner-columns{
    display: flex;
    height: 100%;
    justify-content: center;
}
.banner-column{
    width: 50%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}
.banner-p1{
    font-size: 42px;
    font-weight: 600;
    color: #437df4;
    margin-bottom: 14px;
}
.banner-p2{
    font-size: 14px;
    margin-bottom: 14px;
}
.banner-button{
    display: inline-block;
    background-color: #437df4;
    color: #fff;
    font-size: 14px;
    padding: 6px 10px;
}


/* 企业概况 */
#aboutus{
    width: 100%;
    position: relative;
}
.aboutus-background{
    width: 100%;
    font-size: 0;
}
.aboutus-background > img{
    width: 100%;
    margin: 0 auto;
}
.aboutus-content{
    position: absolute;
    top: 0;
    height: 100%;
    width: 100%;
}
.aboutus-columns{
    width: 100%;
    max-width: 1344px;
    margin: 0 auto;
    display: flex;
    padding: 0 12px;
}
.aboutus-column{
    width: 50%;
    height: auto;
}
.aboutus-column:nth-child(2){
    display: flex;
    align-items: flex-end;
}
.aboutus-column:nth-child(2) img{
    display: none;
    width: 100%;
    padding: 30px 20px;
    padding-bottom: 0;
}


/* 企业介绍 */
#about{
    width: 100%;
}
#about > .container{
    width: 100%;
    max-width: 1344px;
    margin: 0 auto;
    padding: 0 12px;
}
.about-columns{
    width: 100%;
    display: flex;
    align-items: center;
    padding: 50px 0;
    flex-wrap: wrap;
}
.about-column{
    width: 50%;
}
.about-column-text{
    padding: 0 50px;
}
.about-column-img{
    width: 100%;
}
.about-column-img > img{
    width: 100%;
    height: auto;
}



/* 发展历程 */
#history{
    width: 100%;
}
#history > .container{
    width: 100%;
    max-width: 1344px;
    margin: 0 auto;
    padding: 50px 12px;
}
.timeline{
    position: relative;
}
.timeline-item{
    position: relative;
    display: flex;
}
.timeline-item-img{
    width: 240px;
    padding: 5px 20px;
}
.timeline-item-img > img{
    width: 100%;
    border-radius: 8px;
}
.timeline-item-detail{
    width: calc(100% - 240px);
    padding: 10px 80px;
    border-left: 2px solid #dcdcdc;
}
    .timeline-item-year{
        font-size: 36px;
        padding: 20px 0;
        position: relative;
    }
    .timeline-item-year::before{
        content: '';
        width: 12px;
        height: 12px;
        position: absolute;
        left: -81px;
        top: 50%;
        transform: translate(-50%, -50%);
        background-color: #ffd200;
        border-radius: 50%;
    }
    .timeline-item-text{
        font-size: 16px;
        line-height: 26px;
    }
.timeline-item:nth-child(1)::before{
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-top: 2px solid #dcdcdc;
    border-right: 2px solid #dcdcdc;
    transform-origin: center;
    /* background-color: #ccc; */
    transform: rotate(-45deg) translateX(-50%);
    left: 238px;
    top: -4px;
}



.aboutus-background-mobile{
    width: 100%;
}
.aboutus-background-mobile > img{
    width: 100%;
}



/* 适配方案 */
@media screen and (max-width: 1650px){
    #banner{
        background-size: auto 100%;
    }
}


.mini-show{
    display: none;
}
.mini-hide{
    display: block;
}
.mini-hide.flex{
    display: flex;
}
.mini-hide.inline{
    display: inline;
}
.section-title{

}
@media screen and (max-width: 1200px){
    .aboutus-background{
        display: none;
    }
    .aboutus-content{
        position: relative;
    }
    .aboutus-column:nth-child(2) img{
        display: block;
    }
}
@media screen and (max-width: 750px){
    .mini-show{
        display: block;
    }
    .mini-show.flex{
        display: flex;
    }
    .mini-hide{
        display: none !important;
    }



    .banner-column{
        width: 100%;
        justify-content: flex-start;
        padding-top: 16%;
    }
    .banner-p1{
        font-size: 36px;
    }
    .banner-p2{
        font-size: 12px;
    }


    /* 企业情况 */
    .aboutus-content{
        position: relative;
        padding: 50px 0;
    }
    .aboutus-columns{
        flex-wrap: wrap;
    }
    .aboutus-column{
        width: 100%;
    }
    .aboutus-text{
        padding: 20px 30px;
        font-size: 12px;
        line-height: 18px;
    }


    /* anout */
    .about-columns{
        padding: 20px 0;
    }
    .about-column{
        width: 100%;
    }
    .about-column-text{
        font-size: 12px;
        margin-bottom: 20px;
        padding: 0 30px;
    }

    .about-columns:nth-child(1) .about-column:nth-child(2){
        order: 0;
    }
    .about-columns:nth-child(2) .about-column:nth-child(1){
        order: 1;
    }


    /* 企业发展 */
    #history > .container{
        padding-left: 50px;
    }
    .timeline{
        padding: 50px 0;
    }
    .timeline-item{
        flex-direction: column;
    }
    .timeline-item-img{
        border-left: 2px solid #dcdcdc;
        width: 100%;
        max-width: 200px;
        position: relative;
    }
    .timeline-item-img::before{
        content: '';
        width: 10px;
        height: 10px;
        position: absolute;
        left: -1px;
        top: 50%;
        transform: translate(-50%, -50%);
        background-color: #ffd200;
        border-radius: 50%;
    }
    .timeline-item-detail{
        width: 100%;
        padding: 10px 20px;
    }
    .timeline-item-year{ 
        font-size: 18px;
        padding: 0 0;
    }
    .timeline-item-year::before{
        content: none;
    }
    .timeline-item-text{
        font-size: 12px;
    }
    .timeline-item:nth-child(1)::before{
        left: -2px;
    }
}