@charset "UTF-8";

/* カスタムプロパティ */
:root {
    --isheet-primary: #0064e1;
    --isheet-primary-border: #a9cdf5;
    --isheet-primary-bg: #eef5fd;
    --isheet-block-gap: 2rem;      /* 本文ブロックの下マージン（PC） */
    --isheet-block-gap-sp: 1rem;   /* 同・〜1080px / スマホ */
}

/* 共通レイアウト・見出し */
section {
    width: 1200px;
    margin: 0 auto;
}

section.page_contents {
    margin-bottom: 11rem;
}

section .box_header {
    margin-bottom: 5rem;
}

section h3 {
    /* 478px:32px 〜 1080px以上:54px でなめらかに可変 */
    font-size: clamp(32px, 14.5px + 3.65vw, 54px);
    font-weight: 500;
    color: var(--isheet-primary)
}

section.page_contents h3 small{
    margin-left: 1em;
    font-size: 0.5em;
    opacity: 0.6;
}

section h4 {
    border-left: solid 5px var(--isheet-primary);
    margin-bottom: 1.6rem;
    padding-left: 10px;
    /* 478px:18px 〜 1080px以上:36px でなめらかに可変 */
    font-size: clamp(18px, 3.7px + 3vw, 36px);
    font-weight: 500;
}

section h4 small {
    margin-left: 1em;
    font-size: 0.5em;
}

/* 特性リスト（.issheet-point-list） */
.issheet-point-list {
    display: flex;
    gap: 1.3rem;
    margin-bottom: var(--isheet-block-gap);
}

.issheet-point-list li {
    flex: 1;
    padding: 0.5rem;
    border: 5px solid var(--isheet-primary-border);
    border-radius: 1em;
    background-color: var(--isheet-primary-bg);
    /* rgba(0,100,225,.12) = --isheet-primary の 12% */
    box-shadow: 0 2px 6px rgba(0, 100, 225, 0.12);
}

/* .box_inner 前置で base の `section .box_inner p` (0,1,2) に勝たせる */
.box_inner .issheet-point-list__ttl {
    margin-bottom: 0.2rem;
    font-size: 1.6em;
    font-weight: 600;
    line-height: 1.3;
    color: var(--isheet-primary);
    letter-spacing: 0.2em;
}

.box_inner .issheet-point-list__txt {
    margin-bottom: 0;
    font-size: 0.95em;
    line-height: 1.4;
}

/* 施工効果（.issheet-kouka / .issheet-kouka-list） */
.issheet-kouka .flexbox{
    display: flex;
    gap: 1rem;
}

.issheet-kouka .flexbox > div{
    flex: 1;
    text-align: center;
}

.issheet-kouka .flexbox img{
    max-height: 200px;
}

.issheet-kouka-list{
    display: flex;
    gap: 1rem;
    margin-top: 0.5rem;
}

.issheet-kouka-list li{
    flex: 1;
}

.box_inner .issheet-kouka-list__ttl{
    margin-bottom: 0;
    background-color: var(--isheet-primary);
    color: #fff;
}

.box_inner .issheet-kouka-list__txt{
    text-align: left;
}

/* 施工事例（.issheet-case） */
.issheet-case .flexbox {
    margin-bottom: var(--isheet-block-gap);
}

.issheet-case .flexbox:last-child {
    margin-bottom: 0;
}

.issheet-case__pair {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.issheet-case__pair img {
    /* 2枚 + gap*2(2rem) + 矢印18px を差し引いて等分 */
    width: calc((100% - 2rem - 18px) / 2);
    height: auto;
}

/* 右向き三角（テーマブルー） */
.issheet-case__arrow {
    flex: 0 0 auto;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 12px 0 12px 18px;
    border-color: transparent transparent transparent var(--isheet-primary);
}

.box_inner .issheet-case__cap {
    margin: 0.6rem 0 0;
    font-weight: bold;
    line-height: 1.5;
}

/* 本文段落 */
section .box_inner p {
    margin-bottom: var(--isheet-block-gap);
    line-height: 1.7;
}

/* レスポンシブ（1500px 〜 478px / max-width） */
@media screen and (max-width:1500px) {
    .title_sec {
        width: 85vw;
        margin: 0 auto;
    }
}

@media screen and (max-width:1440px) {
    section.page_contents {
        width: 85vw;
        height: auto;
    }
}

@media screen and (max-width:1300px) {
    section .box_inner p br {
        display: none;
    }
}

@media screen and (max-width:1200px) {
    .title_sec,
    section.page_contents {
        width: 90vw;
    }
}

@media screen and (max-width:1080px) {
    .p5vw {
        padding: 0 !important;
    }

    .title_sec,
    section.page_contents {
        width: auto;
    }

    section .box_header {
        margin-bottom: 3rem;
    }

    section .box_inner p {
        margin-bottom: var(--isheet-block-gap-sp);
    }

    section.page_contents {
        margin-bottom: 5rem;
    }
}

@media screen and (max-width:800px) {
    section.page_contents {
        margin-bottom: 2rem;
    }
}

@media screen and (max-width:768px) {
    section.page_contents h3 small{
        margin-left: 0;
    }
}

@media screen and (max-width:700px) {
    section .box_header {
        margin-bottom: 2rem;
    }
}

@media screen and (max-width:478px) {
    .title_sec {
        padding: 0 !important;
    }

    section {
        width: auto;
        padding: 0;
    }

    section.page_contents {
        margin-bottom: 3rem;
    }

    section h3 {
        padding-bottom: 10px;
        margin-bottom: 2rem;
        line-height: 1;
    }

    section h4 {
        margin-bottom: var(--isheet-block-gap-sp);
        line-height: 1.3;
    }

    section h4::before {
        height: 90%;
        top: 2px;
    }

    section .box_header {
        margin-bottom: 2rem;
    }

    section .box_inner p {
        margin-bottom: var(--isheet-block-gap-sp);
    }

    .issheet-point-list {
        display: block;
    }

    .issheet-point-list li {
        margin-bottom: var(--isheet-block-gap-sp);
    }

    .issheet-point-list li:last-child {
        margin-bottom: 0;
    }

    .issheet-kouka .flexbox {
        display: block;
    }

    .issheet-case__pair {
        flex-direction: column;
    }

    .issheet-case__pair img {
        width: 100%;
    }

    .issheet-case__arrow {
        border-width: 18px 12px 0 12px;
        border-color: var(--isheet-primary) transparent transparent transparent;
    }
}