html{
    box-sizing: border-box;
}

*, *::before, *::after{
    box-sizing: inherit;
}


a{
    color: inherit;
    text-decoration: none;
}

button{
    padding: 0;
    border: none;
    background-color: transparent;
    cursor: pointer;
}

ul{
    list-style: none;
}

body{
    color: #000;
    font-weight: 500;
    line-height: 1.2;
    font-size: 16px;
    font-family: 'Inter', sans-serif;

}


.container{
    max-width: 1200px;
    padding: 0 10px;
    margin: 0 auto;
}

.main-title {
    font-weight: 700;
    font-size: 64px;
    margin-bottom: 20px;
}

.header{
    min-height: 100vh;
    position: relative;
}

.content-item{
    display: none;
}

.content-item.content-item-active{
    display: inline-block;
}

.header_top{
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 40px 0;
}

.menu_list{
    display: flex;
    gap: 0 40px;
    align-items: center;
    font-weight: 700;
}

.menu_btn{
    padding: 15px 58px;
    border-radius: 30px;
    background-color: #000;
    font-weight: 700;
    text-transform: uppercase;
    color: white;
}

.header_content-images{
    text-align: center;
    padding-bottom: 50px;
}

.header_content-images::before{
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    left: 0;
    bottom: 0;
    width: 100%;
    z-index: -2;
}


.header_content-images:has(.color-blue.content-item-active)::before{
    background: linear-gradient(180deg, #cadbeb 0%, rgba(235, 235, 235, 0) 100%);
}

.header_content-images:has(.color-red.content-item-active)::before {
    background: linear-gradient(180deg, #f3d6d1 0%, rgba(235, 235, 235, 0) 100%);
}

.header_content-images:has(.color-green.content-item-active)::before {
    background: linear-gradient(180deg, #ddead9 0%, rgba(235, 235, 235, 0) 100%);
}

.header_content-images:has(.color-black.content-item-active)::before {
    background: linear-gradient(180deg, #b6b6b6 0%, rgba(235, 235, 235, 0) 100%);
}

.header_content-images:has(.color-white.content-item-active)::before {
    background: linear-gradient(180deg, #fafafa 0%, rgba(235, 235, 235, 0) 100%);
}

.title{
    font-size: 210px;
    font-weight: 700;
    position: absolute;
    padding-top: 110px;
}

.title--pod{
    position: relative;
    z-index: -1;
}

.title--s{
    display: inline-block;
    transform: translateY(60px);
}

.title--m{
    display: inline-block;
    transform: translate(-65px, 275px);
}

.title--ax{
    display: inline-block;
    transform: translate(-128px, 413px);
    z-index: -1;
    position: relative;
}

.choose-color {
    padding: 45px 0 180px;
    text-align: center;
}

.choose-color-title {
    font-weight: 700;
        font-size: 36px;
        line-height: 1.2;
        color: #000;
    max-width: 555px;
        margin: 0 auto 20px;
}

.choose-color-text {
    max-width: 555px;
    margin: 0 auto 80px;
}

.choose-color-list {
    display: flex;
    gap: 40px;
    justify-content: center;

}

.choose-color-btn {
    border: 1px solid #777;
        border-radius: 20px;
        padding: 50px 55px;
}

.choose-color-btn-active{
    display: none;
}

.composition {
    margin-bottom: 180px;
}

.composition-title {
    text-align: center;
}

.composition-text {
    text-align: center;
    max-width: 655px;
    margin: 0 auto 40px;
}

.composition-inner {
    max-width: 625px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
}

.composition-inner-text {
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 15px;
}

.composition-inner-text p {
    width: 230px;
}

.case {
    background-color: #fafafa;
    padding: 80px 0 100px;
    text-align: center;
}

.case-title {}

.case-text {
    max-width: 825px;
    margin: 0 auto 40px;
}

.energy-title {
    padding-top: 160px;
    margin-bottom: 40px;
}

.energy-num {
    font-weight: 700;
    font-size: 210px;
    margin-bottom: 40px;
}

.energy-text {
    max-width: 400px;
    margin: 0 auto;
}

.audio {
 /* position: relative; */
background-image: url(../images/audio-full.jpg);
    background-repeat: no-repeat;
    background-position: top center;
    background-size: cover;
}

/* .audio::before{
    content: '';
    background-image: url(../images/audio-bg.jpg);
        background-repeat: no-repeat;
        background-position: top center;
        background-size: cover;
        position: absolute;
        z-index: -2;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
}

.audio::after{
    content: '';
    position: absolute;
    background-image: url(../images/sound.png);
    background-repeat: no-repeat;
    background-position: bottom center;
    background-size: cover;
    bottom: -250px;
    right: 0;
    left: 0;
    width: 100%;
    height: 150vh;
    z-index: -1;
} */

.audio-inner {
    min-height: 235vh;
    display: flex;
        align-items: flex-end;
        justify-content: center;
}

.audio-box {
    text-align: center;
    color: white;
    padding-bottom: 50vh;
}

.audio-text {
    width: 300px;
    margin-bottom: 10px;
    font-weight: 500;
}

.btn {
    text-transform: uppercase;
    font-weight: 700;
    color: #000;
    background-color: white;
    border-radius: 30px;
        padding: 15px 58px;
        margin-top: 25px;
}

.footer{
    padding: 50px 0 40px;
    background-color: #000;
    color: white;
    text-align: center;
    font-weight: 700;
}

.footer-link {}

.footer-text {
    padding: 20px 0;
}

.footer-list {
    padding-top: 80px;
    display: flex;
    justify-content: center;
    align-items: center;
    gap:20px;
    flex-wrap: wrap;
}

/* ----------adaptive------------ */

@media (max-width: 1487px){
    .header_content-images img{
        max-width: 100%;
    }

    .title{
        font-size: 180px;
        transform: translate(129px, 29px);
    }
}

@media (max-width: 1349px) {
    .title{
        transform: none;
        font-size: 140px;
        padding-top: 20vh;
        left: 0;
        right: 0;
        text-align: center;
    }

    .title--pod{
        z-index: 1;
    }

    .title--s{
        transform: none;
    }

    .title--m{
        transform: none;
    }

    .title--ax{
        transform: none;
    }
}

@media (max-width: 1200px){
    .choose-color-list{
        flex-wrap: wrap;
    }
}

@media (max-width: 930px) {
    .title{
        position: relative;
        font-size: 100px;
        padding-top: 0;
    }

    .title--m{
        padding-left: 15px;
    }
}

@media (max-width: 768px){
    .choose-color{
        padding-bottom: 60px;
    }

    .choose-color-list{
        gap: 16px;
    }

    .main-title{
        font-size: 36px;
    }

    .composition{
        margin-bottom: 60px;
    }

    .case{
        padding: 60px 0;
    }

    .energy-title{
        padding-top: 60px;
        margin-bottom: 20px;
    }

    .energy-num{
        font-size: 110px;
        margin-bottom: 20px;
    }

    .title{
        font-size: 58px;
    }
}

@media (max-width: 560px){
    .choose-color-text{
        margin-bottom: 40px;
    }

    .choose-color{
        padding-bottom: 40px;
    }

    .case{
        padding: 40px 0;
    }

    .composition-inner-text p{
        width: 100%;
    }

    .composition-inner{
        flex-wrap: wrap;
        gap: 40px;
        justify-content: center;
        text-align: center;
    }

    .menu_list{
        flex-wrap: wrap;
        gap: 20px 40px;
    }

    .menu_item-btn{
        margin-left: auto;
    }

    .menu_item-btn button     {
        width: 250px;
    }

    .menu_item:first-child{
        margin-left: auto;
    }

    .header_top{
        align-items: flex-start;
    }

}

@media (max-width: 414px){
    .main-title, .choose-color-title{
        font-size: 28px;
    }

    .energy-num{
        font-size: 92px;
    }

    .case img{
        max-width: 100%;
    }
}

@media (max-width: 404px) {
    .title{
        font-size: 50px;
    }
}