#site-header {
    position: sticky;
}

.shiki-header {
    width: 100%;
    /* max-width: 1440px; */
    margin: auto;

    img {
        width: 100%;
        vertical-align: middle;
    }
}

#intro {
    background-image: url(../img/shiki/shiki_concept_bg_sp.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    background-position: center;
    /* height: 300px; */
    padding: 44px 0;
    /* max-width: 1440px; */
    margin: auto;
    font-family: var(--mi);
    color: white;
    position: relative;

    .wrapper {
        max-width: 720px;
        position: relative;
        z-index: 2;
    }

    h2 {
        font-size: 2rem;
        font-weight: 500;
        line-height: 1.5;
        margin-bottom: 24px;
    }

    p {
        line-height: 1.78;
        font-weight: 500;
    }
}

@media (min-width: 960px) {
    #intro {
        background-image: url(../img/shiki/shiki_concept_bg.jpg);
        padding: 64px 0;

        .wrapper {
            max-width: 1180px;
        }

        h2 {
            margin-bottom: 32px;
        }

        p {
            line-height: 2.1;
        }
    }
}

#intro::before {
    content: '';
    display: block;
    position: absolute;
    inset: 0;
    z-index: 1;
    background-color: black;
    opacity: 0.2;
    width: 100%;
    height: 100%;
}

@media screen and (min-width: 960px) {
    #intro {
        padding: 108px 0;

        h2 {
            font-size: 3.8rem;
            font-weight: 400;
        }
    }
}

#price {
    background-color: #fafafa;
    padding: 32px 0;

    .image-container {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 5px;
        margin-bottom: 20px;
    }

    .image-container .sp-wide {
        grid-column: 1 / 3;
    }

    .image-container img {
        height: 140px;
        width: 100%;
        object-fit: cover;
    }

    h2 {
        font-size: 1.8rem;
        font-weight: 500;
        font-family: var(--mi);
        line-height: 1.4;
        margin-bottom: 18px;
    }

    .text-container p+p {
        margin-top: 0.8em;
    }

    .price-container {
        margin-top: 24px;
        padding-left: 15px;
        border-left: 1px solid #b2b2b2;
    }

    .price-wrapper {
        display: flex;
        gap: 12px;
        align-items: baseline;
        font-family: var(--mi);
        line-height: 1;
    }

    .size {
        font-size: 2rem;
        letter-spacing: 0.025em;
    }

    .size span {
        font-size: 1.6rem;
    }

    .separator {
        width: 1px;
        height: 12px;
        background-color: #a2a2a2;
    }

    .price {
        font-size: 2.5rem;
        letter-spacing: 0.025em;
    }

    .price .price-sub {
        font-size: 1.8rem;
    }

    .price .price-tax {
        font-size: 1.2rem;
    }

    .attention {
        margin-top: 10px;
    }

    .attention p {
        font-size: 1.1rem;
    }
}

@media (min-width: 960px) {
    #price {
        padding: 92px 0;

        .image-container {
            grid-template-columns: repeat(3, 1fr);
            gap: 8px;
            margin-bottom: 40px;
        }

        .image-container img {
            height: 280px;
        }

        .image-container .sp-wide {
            grid-column: auto;
        }

        h2 {
            font-size: 3.2rem;
            max-width: 1100px;
            margin-inline: auto;
        }

        .flex-container {
            max-width: 1100px;
            margin-inline: auto;

        }

        .text-container {
            width: 55%;
        }

        .price-container {
            margin-top: 0;
            padding-top: 10px;
            padding-left: 44px;
        }

        .size {
            font-size: 3.2rem;
        }

        .size span {
            font-size: 2.2rem;
        }

        .price {
            font-size: 3.8rem;
        }

        .price .price-sub {
            font-size: 2.8rem;
        }

        .price .price-tax {
            font-size: 1.4rem;
            font-weight: 500;
        }

        .attention {
            margin-top: 10px;
        }

        .attention p {
            font-size: 1.4rem;
        }
    }
}

#quality {
    padding: 40px 0;

    h2,
    .quality-item h3 {
        margin-bottom: 25px;
        text-align: center;
        font-family: var(--mi);
        font-size: 2rem;
        line-height: 1.5;
        font-weight: 500;

        span {
            background: linear-gradient(transparent 60%, #F9F4EF 60%);
        }
    }

    .quality-list {
        display: flex;
        flex-direction: column;
        gap: 30px;
    }

    .quality-item h3 {
        font-size: 1.8rem;
        margin-bottom: 10px;
    }

    .quality-item p {
        letter-spacing: 0.03em;
        line-height: 1.78;
    }
}

@media (min-width: 960px) {
    #quality {
        padding: 88px 0;

        .wrapper {
            max-width: 1180px;
        }

        h2 {
            font-size: 4.4rem;
            margin-bottom: 80px;
        }

        .quality-list {
            gap: 88px;
        }

        .quality-item {
            display: flex;
            gap: 56px;
        }

        .quality-item:nth-child(2n) {
            flex-direction: row-reverse;
        }

        .quality-item h3 {
            font-size: 3.2rem;
            text-align: left;
            margin-bottom: 40px;
        }

        .quality-item img {
            max-width: 580px;
            width: 55%;
        }
    }
}

#shiki-footer {
    max-width: 520px;
    margin-inline: auto;

    img {
        width: 100%;
    }
}

@media (min-width: 960px) {
    #shiki-footer {
        max-width: 1440px;
    }
}