header {
    margin-bottom: 32px;
}

.header-list {
    max-width: 1200px;
    margin: 0 auto;
    list-style: none;
    padding: 16px;
    font-size: 1.8rem;
    color: #333;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #8c8b8b;
}
.header-list .item {
    max-width: 300px;
}
.header-logo {
    width: 88px;
}

.sp-header {
    display: none;
}
.sp-header-menu {
    display: none;
}

@media screen and (max-width: 640px) {
    .pc-header {
        display: none;
    }

    .sp-header {
        padding: 16px;
        display: block;
        position: relative;
    }
    .header-logo {
        width: 88px;
        margin: 0 auto;
    }
    .sp-menu-icon {
        display: flex;
        height: 24px;
        border: none;
        position: absolute;
        top: 16px;
        right: 16px;
        background-color: transparent;
    }
    .sp-menu-icon .icon-menu::before {
        content: '';
        display: block;
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background-color: black;
        position: relative;
        top: -8px;
    }
    .sp-menu-icon .icon-menu {
        margin: 8px 0;
        content: '';
        display: block;
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background-color: black;
    }
    .sp-menu-icon .icon-menu::after {
        content: '';
        display: block;
        width: 4px;
        height: 4px;
        border-radius: 50%;
        background-color: black;
        position: relative;
        top: 4px;
    }
    .sp-header-menu {
        /* display: block; */
        padding: 40px 24px;
        width: 100vw;
        height: 100vh;
        background-color: #ffffff;
        position: fixed;
        top: 0;
        left: 0;
        z-index: 1;
    }

    .sp-header-menu-close-button {
        position: absolute;
        width: 24px;
        height: 24px;
        display: flex;
        align-items: center;
        justify-content: center;
        right: 16px;
        top: 16px;
        border: 1px solid #8c8b8b;
        border-radius: 50%;
        background-color: transparent;
    }
    .sp-header-menu .sp-header-menu-list {
        padding-bottom: 16px;
        list-style: none;
        text-align: center;
        color: #333333;
        border-bottom: 1px solid #8c8b8b;
    }
    .sp-header-menu-list .item {
        margin-bottom: 16px;
    }
    .sp-header-menu-list .item:last-child {
        margin-bottom: 0;
    }
}