.fig-title {
    font-size: 1.1em;
    line-height: 1.5;
    margin-bottom: 1em;
    position: relative;
    padding-left: 1em;
}

.caption {
    display: block;
    margin: 1em 0;
    font-size: min(.8em, 3vw);
}

.fig-title::before {
    content: '';
    display: block;
    width: .5em;
    height: .5em;
    background-color: #222;
    border-radius: 100%;
    position: absolute;
    top: 0.4em;
    left: 0;
}

.co {
    padding: 5em 1em;
}

@media screen and (max-width:767px) {
    .co {
        padding: 4em 1.5em;
    }
}

/* .co1-wrp .inner {
    max-width: 1000px;
} */
.co2-wrp .inner {
    max-width: 1000px;
}

.co .en-num {
    font-size: 3em;
    text-align: center;
    text-decoration: underline;
    text-underline-offset: .35em;
    text-decoration-thickness: 1.5px;
    margin-bottom: .5em;
    color: var(--brand-color);
}

.co .txt-box {
    width: 46%;
    text-align: left;
}

.co .fig-box {
    width: 48%;
    text-align: left;
}

@media screen and (max-width:767px) {
    .co .txt-box {
        width: 100%;
    }

    .co .fig-box {
        width: 90%;
        margin: 1.5em auto;
    }
}

.co-title {
    font-size: 1.6em;
    font-weight: normal;
    margin-bottom: 1em;
}

@media screen and (max-width:767px) {
    .co-title {
        font-size: 5vw;
        margin-bottom: 1.5em !important;
    }
}

.co-lead {
    line-height: 2;
    margin-bottom: 1em;
}

@media screen and (max-width:767px) {
    .co-lead {
        font-size: 3.5vw;
        line-height: 1.8;
    }
}

.co1-wrp {
    padding: 5em 1em;
}

.co1-wrp .title {
    margin-bottom: 1em;
}

.co1-wrp .title+.note {
    padding: 0 1em 0 2em;
    /* text-indent: -1em; */
    display: inline-block;
    width: fit-content;
    margin: 0 auto 4rem;
    text-align: left;
}

.co1-wrp .title+.note a {
    color: var(--brand-color);
}

.co1-wrp .title .sml {
    display: block;
    font-size: .8em;
    margin-bottom: .25em;
}

.co1-wrp .title .upgrade {
    text-decoration: underline;
    text-underline-offset: .3em;
    text-decoration-color: var(--brand-color);
}

/* method */
.method {
    width: 100%;
    display: flex;
    justify-content: space-between;
}

@media screen and (max-width:767px) {
    .method {
        flex-wrap: wrap;
    }
}

.method .house-wrp {
    width: 60%;
    border: 1px solid #ddd;
    border-right: none;
    background-color: #f9f9f9;
    padding: 1em;
}

@media screen and (max-width:767px) {
    .method .house-wrp {
        width: 100%;
    }
}

.method .house {
    margin: 0 auto 5em;
    position: sticky;
    top: 150px;
}

.method .house-inner {
    padding: 5% 10%;
    position: relative;
}

.method .house .note {
    font-size: 12px;
    margin: 2em;
}

.method .house .note li {
    display: block;
}

.method .house img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    opacity: 1;
}

.method-btn {
    display: inline-block;
    min-width: 5em;
    padding: .5em 1em;
    position: absolute;
    text-align: center;
    border-radius: 3px;
    cursor: pointer;
}

.method-btn.ceiling {
    background-color: #C2E6B8;
    top: 5%;
    right: 25%;
}

.method-btn.wall {
    background-color: #F18E69;
    top: 40%;
    left: 5%;
}

.method-btn.floor {
    background-color: #E0E09F;
    bottom: 0;
    right: 25%;
}

.method-btn.window {
    background-color: #A2D7D4;
    top: 35%;
    right: 5%;
}

.method-info-wrp {
    width: 40%;
    border: 1px solid #ddd;
}

@media screen and (max-width:767px) {
    .method-info-wrp {
        width: 100%;
    }
}

.method-info {
    width: 100%;
    padding: 3em 2em;
    border-bottom: 1px solid #ddd;
}

.method-info:last-child {
    border-bottom: none;
}

.method-title {
    display: block;
    width: fit-content;
    font-size: min(1.2em, 3.5vw);
    font-weight: normal;
    text-align: center;
    margin: 0 auto 1em;
    position: relative;
}

@media screen and (max-width:767px) {
    .method-title {
        font-size: 4.5vw;
    }
}

.method-title::after {
    content: '';
    display: block;
    width: 3em;
    height: 2px;
    margin: 1em auto;
}

.method-title span {
    display: inline-block;
    font-size: .85em;
    line-height: 1.2;
    padding: .25em .5em;
    margin-right: .25em;
    border-radius: 3px;
    transform: translateY(-.15em);
}

.ceiling .method-title span,
.ceiling .method-title::after,
.ceiling .fig-title::before {
    background-color: #C2E6B8;
}

.wall .method-title span,
.wall .method-title::after,
.wall .fig-title::before {
    background-color: #F18E69;
}

.floor .method-title span,
.floor .method-title::after,
.floor .fig-title::before {
    background-color: #E0E09F;
}

.window .method-title span,
.window .method-title::after,
.window .fig-title::before {
    background-color: #A2D7D4;
}

.method-img {
    width: 100%;
    padding: 1em 3em;
    margin-bottom: 1em;
}

.method-meta {
    width: 100%;
}

.method-meta .fig-title {
    width: 100%;
    margin-bottom: 1em;
    font-size: 1em;
}

@media screen and (max-width:767px) {
    .method-meta .fig-title {
        font-size: 3.5vw;
    }
}

.method-meta .fig-img {
    width: 54%;
    margin: 0;
    padding: 0;
}

.method-meta .txt-box {
    width: 45%;
    font-size: min(.9em, 3vw);
    line-height: 1.7;
}

.method-meta .txt-box p {
    font-size: min(.9em, 3vw);
    line-height: 1.8;
}

@media screen and (max-width:767px) {
    .method-meta .txt-box p {
        font-size: 3vw;
        line-height: 1.6;
    }
}

.co2-wrp {
    background-color: var(--gray);
}

.history-title {
    font-size: 1.3em;
    font-weight: normal;
    line-height: 1.6;
    margin-bottom: 1em;
}

@media screen and (max-width:767px) {
    .history-title {
        font-size: 4.5vw;
    }
}

.history .fig-title {
    font-size: .95em;
    margin-bottom: 1.5em;
}

@media screen and (max-width:767px) {
    .history .fig-title {
        font-size: 3.5vw;
    }
}

.history .fig-position {
    transform: translateY(-15%);
}