.index-introduction-box{
    width: 100%;
    display: block;
    position: relative;
    margin-top: 260px;
    box-sizing: border-box;
    padding-bottom: 80px;
    overflow: hidden;
}
.index-introduction-bg-box{
    width: 100%;
    height: 100%;
    display: block;
    position: absolute;
    top: 0;
    left: 0;
}
.index-introduction-bg-box span{
    width: 100%;
    height: calc(100% - 240px);
    display: block;
    background-color: #f5f5f5;
}
.index-introduction-bg-box p{
    font-size: 120px;
    line-height: 1;
    color: #000;
    opacity: 0.035;
    letter-spacing: 0.1em;
    font-family: "roboto";
    box-sizing: border-box;
    padding: 60px 9.5vw;
    padding-bottom: 150px;
}
.index-introduction-all-box{
    width: 1300px;
    max-width: 100%;
    display: block;
    margin: 0 auto;
    position: relative;
    font-size: 0;
}
.index-introduction-title{
    font-size: 36px;
    line-height: 1.4;
    letter-spacing: 0.1em;
    color: #005888;
    font-family: 'Noto Serif TC';
    font-weight: 700;
}
.index-introduction-title::first-letter{
    color: #e60012;
}
.index-introduction-info-box{
    margin-top: 90px;
}
.index-introduction-info{
    width: 600px;
    max-width: 100%;
    display: inline-block;
    vertical-align: top;
    position: relative;
    margin-right: 100px;
    transition: all .3s linear;
}
.index-introduction-info:nth-child(2n){
    margin-right: 0;
}
.index-introduction-info:nth-child(n + 3){
    margin-top: 40px;
}
.index-introduction-info-img{
    width: 100%;
    height: 520px;
    display: block;
    position: relative;
    overflow: hidden;
}
.index-introduction-info-text{
    width: 500px;
    max-width: 100%;
    margin: 0 auto;
    height: 120px;
    display:         flex;
    display: -webkit-flex;
    align-items: center;
    -webkit-align-items: center;
    justify-content: center;
    -webkit-justify-content: center;
    flex-direction: column;
    position: relative;
    top: -50px;
    font-size: 24px;
    line-height: 30px;
    color: #000;
    letter-spacing: 0.1em;
    font-family: 'Noto Serif TC';
    background-color: #fff;
    box-sizing: border-box;
    padding: 0 10px;
    transition: all .3s linear;
}
.index-introduction-info-text::before{
    content: '';
    width: 50%;
    height: 1px;
    display: block;
    position: absolute;
    bottom: 0;
    left: 0;
    background-color: #005888;
    opacity: 0;
}
.index-introduction-info-text::after{
    content: '';
    width: 50%;
    height: 1px;
    display: block;
    position: absolute;
    bottom: 0;
    right: 0;
    background-color: #e60012;
    opacity: 0;
}


@media only screen and (max-width: 1300px){
    .index-introduction-all-box{
        width: 1200px;
    }
    .index-introduction-info{
        width: 550px;
    }
    .index-introduction-info-img{
        height: calc((520 / 600) * 550px);
    }
}
@media only screen and (max-width: 1200px){
    .index-introduction-box{
        margin-top: 180px;
    }
    .index-introduction-all-box{
        width: 1000px;
    }
    .index-introduction-info{
        width: 450px;
    }
    .index-introduction-info-img{
        height: calc((520 / 600) * 450px);
    }
    .index-introduction-info-text{
        width: 80%;
    }
}
@media only screen and (max-width: 1000px){
    .index-introduction-all-box{
        width: 750px;
    }
    .index-introduction-info{
        width: 350px;
        margin-right: 50px;
    }
    .index-introduction-info-img{
        height: calc((520 / 600) * 350px);
    }
    .index-introduction-title{
        font-size: 28px;
    }
    .index-introduction-info-box{
        margin-top: 40px;
    }
    .index-introduction-box{
        margin-top: 100px;
        padding-bottom: 60px;
    }
    .index-introduction-bg-box p{
        display: none;
    }
    .index-introduction-bg-box span{
        position: absolute;
        bottom: 0;
        height: calc(100% - 140px);
    }
    .index-introduction-info-text{
        height: 80px;
        font-size: 20px;
        line-height: 26px;
        top: -30px;
    }
}
@media only screen and (max-width: 768px){
    .index-introduction-all-box{
        width: 550px;
    }
    .index-introduction-info{
        width: 550px;
        margin-right: 0;
    }
    .index-introduction-info-img{
        height: calc((520 / 600) * 550px);
    }
}
@media only screen and (max-width: 550px){
    .index-introduction-box{
        margin-top: 20px;
        padding-bottom: 20px;
    }
    .index-introduction-title{
        font-size: 18px;
    }
    .index-introduction-info-box{
        margin-top: 10px;
    }
    .index-introduction-all-box{
        width: 95vw;
    }
    .index-introduction-info{
        width: 100%;
        margin-right: 0;
    }
    .index-introduction-info-img{
        height: calc((520 / 600) * 95vw);
    }
    .index-introduction-info-text {
        height: 50px;
        font-size: 14px;
        line-height: 20px;
        top: -15px;
    }
}



@-webkit-keyframes introductionInDown {
    from {
        opacity: 0;
        -webkit-transform: translate3d(0, 10%, 0);
        transform: translate3d(0, 10%, 0);
    }

    to {
        opacity: 0.035;
        -webkit-transform: none;
        transform: none;
    }
}
    
  @keyframes introductionInDown {
    from {
        opacity: 0;
        -webkit-transform: translate3d(0, 10%, 0);
        transform: translate3d(0, 10%, 0);
    }

    to {
        opacity: 0.035;
        -webkit-transform: none;
        transform: none;
    }
}
@media only screen and (min-width: 1001px){
    .index-introduction-info:hover{
        -webkit-filter: drop-shadow(0 0 5px rgba(0, 0, 0, 0.35));
        filter: drop-shadow(0 0 5px rgba(0, 0, 0, 0.35));
    }
    .index-introduction-info:hover .main-bg{
        transform: scale(1.1);
    }
    .index-introduction-info:hover .index-introduction-info-text{
        background-color: #005888;
        color: #fff;
    }


    .index-introduction-title,
    .index-introduction-bg-box span,
    .index-introduction-info{
        opacity: 0;
    }
    .index-introduction-title.anima{
        animation: fadeInRight 1s ease 0s 1 both;
    }
    .index-introduction-bg-box.anima p{
        animation: introductionInDown 1s ease 0s 1 both;
    }
    .index-introduction-bg-box.anima span{
        animation: fade 1s ease 0s 1 both;
    }
    .index-introduction-info.anima{
        animation: fadeInUp 1s ease 0s 1 both;
    }
    .index-introduction-info.anima .index-introduction-info-text{
        animation: fadeInDown 1s ease .6s 1 both;
    }
}