.introduction-box{
    width: 100%;
    position: relative;
    display: block;
}
.introduction-info-box{
    width: 1200px;
    max-width: 100%;
    display: block;
    margin: 0 auto;
    font-size: 0;
    box-sizing: border-box;
    padding: 100px 0;
}
.introduction-info{
    width: 100%;
    display: block;
    margin: 0 auto;
    font-size: 0;
    background-color: #fff;
    box-sizing: border-box;
    padding: 60px 80px;
}
.introduction-info-title{
    font-size: 28px;
    font-weight: bold;
    color: #162148;
    letter-spacing: 1px;
}
.introduction-info-text{
    font-size: 18px;
    color: #333;
    line-height: 2.8;
    letter-spacing: 1px;
}
.introduction-info-b{
    width: 100%;
    box-sizing: border-box;
    padding-top: 140px;
    position: relative;
}
.introduction-info-b:nth-child(1){
    padding-top: 100px;
}
.introduction-info-img-box{
    width: 800px;
    height: 500px;
    display: block;
    position: relative;
    z-index: 0;
    overflow: hidden;
}
.introduction-info-img{
    width: 100%;
    height: 100%;
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    display: block;
    transition: all .3s linear;
}
.introduction-info-img-box:hover .introduction-info-img{
    transform: scale(1.1);
}
.introduction-info-b-text-box{
    width: 460px;
    display: flex;
    position: absolute;
    bottom: -40px;
    right: 0;
    background-color: #fff;
    box-sizing: border-box;
    padding: 40px 35px;
    flex-direction:column;
    justify-content:center;
}
.introduction-info-b-text-title{
    font-size: 22px;
    font-weight: bold;
    color: #ae8c4f;
    letter-spacing: 2px;
    display: inline-block;
    vertical-align: middle;
}
.introduction-info-b-text-ingredient{
    display: inline-block;
    vertical-align: middle;
    font-size: 16px;
    letter-spacing: 4px;
    width: 80px;
    border: 1px solid #162148;
    color: #162148;
    text-align: center;
    cursor: pointer;
    margin-left: 20px;
}
.introduction-info-b-text{
    font-size: 16px;
    color: #333;
    line-height: 2;
    letter-spacing: 1px;
}

.introduction-info-b:nth-child(even) .introduction-info-img-box{
    margin-left: auto;
}
.introduction-info-b:nth-child(even) .introduction-info-b-text-box{
    right: inherit;
    left: 0;
}

@media only screen and (max-width: 1200px){
    .introduction-info-box{
        width: 1000px;
    }
}
@media only screen and (max-width: 1000px){
    .introduction-info-box{
        width: 750px;
    }
    .introduction-info-img-box{
        width: 600px;
        height: 375px;
    }
    .introduction-info-b-text-box{
        min-height: 300px;
        width: 360px;
        padding: 20px;
    }
    .introduction-info-b-text{
        line-height: 2;
    }
}
@media only screen and (max-width: 750px){
    .introduction-info-box{
        width: 550px;
        padding-top: 40px;
        padding-bottom: 40px;
    }
    .introduction-info{
        padding: 40px 60px;
    }
    .introduction-info-img-box{
        width: 100%;
        display: block;
        height: 344px;
    }
    .introduction-info-b:nth-child(1){
        padding-top: 40px;
    }
    .introduction-info-b{
        padding-top: 40px;
    }
    .introduction-info-b-text-box{
        width: 100%;
        display: block;
        bottom: initial;
        top: initial;
        position: relative;
        min-height: initial;
    }
    .introduction-info-title{
        font-size: 26px;
    }
    .introduction-info-text{
        line-height: 2.4;
    }
}
@media only screen and (max-width: 550px){
    .introduction-info-box{
        width: 400px;
        padding-top: 20px;
        padding-bottom: 20px;
    }
    .introduction-info{
        padding: 20px 30px;
    }
    .introduction-info-b:nth-child(1){
        padding-top: 20px;
    }
    .introduction-info-b{
        padding-top: 20px;
    }
    .introduction-info-title{
        font-size: 22px;
    }
    .introduction-info-text{
        line-height: 2;
    }
    .introduction-info-b-text-ingredient{
        font-size: 18px;
        width: 70px;
        line-height: 22px;
    }
    .introduction-info-b-text-title{
        font-size: 18px;
    }
    .introduction-info-b-text{
        font-size: 12px;
    }
    .introduction-info-b-text-box{
        padding: 15px;
    }
    .introduction-info-img-box{
        height: 250px;
    }
    .introduction-info-text{
        font-size: 14px;
    }
}
@media only screen and (max-width: 400px){
    .introduction-info-box{
        width: 300px;
    }
    .introduction-info{
        padding: 10px 20px;
    }
    .introduction-info-img-box{
        height: 188px;
    }
    .introduction-info-b-text-ingredient{
        font-size: 16px;
        border-radius: 5px;
        width: 60px;
    }
    .introduction-info-b-text-title{
        font-size: 16px;
    }
    .introduction-info-title{
        font-size: 18px;
    }
    .introduction-info-text{
        font-size: 12px;
    }
}


/*animation*/

@media only screen and (min-width: 1001px){
    .introduction-info-title,
    .introduction-info-text,
    .introduction-info-img-box,
    .introduction-info-b-text-box{
        opacity: 0;
    }
    .introduction-info-title.active,
    .introduction-info-b-text-box.active{
        animation: fadeInDown 0.8s linear 0s 1 both;
        z-index: 2;
    }
    .introduction-info-text.active{
        animation: fade 0.8s linear 0s 1 both;
    }
    .introduction-info-img-box.active{
        animation: fadeInUp 0.8s linear 0s 1 both;
        z-index: 1;
    }
}