@charset "utf-8";
/* -----------------------------------------------------------
　　無階段セットページ
----------------------------------------------------------- */
/* フォント設定 */
@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@400;700&display=swap');
:root {
  --font-family-m: 'Noto Sans JP', sans-serif;
}
/* === ベース設定 === */
html, body {
  font-size: 62.5%; /* 1rem = 10px */
  line-height: 1.5;
  letter-spacing: normal;
  font-weight: bold;
  font-family: var(--font-family-m);
  text-decoration: none;
}
.stairs-unit {
  font-size: 62.5%;
}
.stairs-unit p {
  margin: 0;
  padding: 0;
  letter-spacing: normal;
  text-indent: 0;
  font-family: var(--font-family-m);
}
/* 各要素の共通文字サイズ（必要なら） */
.stairs-unit div, .stairs-unit article, .stairs-unit section, .stairs-unit ul, .stairs-unit li, .stairs-unit ol, .stairs-unit dl, .stairs-unit dt, .stairs-unit dd, .stairs-unit table, .stairs-unit th, .stairs-unit td, .stairs-unit span {
  font-size: 1.6rem; /* = 16px */
  line-height: 1.5;
  letter-spacing: normal;
  font-weight: bold;
  font-family: var(--font-family-m);
}
.stairs-unit h2 {
  font-size: clamp(2.6rem, 4vw, 3.6rem);
  font-weight: 700;
  font-family: var(--font-family-m);
  letter-spacing: .02em;
  text-align: center;
  line-height: 1.5;
  font-style: italic;
  margin: 0 0 1.2em;
}
.stairs-unit h3 {
  font-family: var(--font-family-m);
  font-style: italic;
  font-size: clamp(1.8rem, 3.2vw, 3.4rem);
  text-align: center;
  font-weight: 700;
  line-height: 1.5;
  letter-spacing: .02em;
  margin: .2em auto 1.2em;
  max-width: 34em;
}
.stairs-unit h3 span {
  display: block;
  font-size: clamp(1.6rem, 2.4vw, 2.6rem);
  letter-spacing: .12em;
  margin-bottom: 0;
}
.stairs-unit h4 {
  font-family: var(--font-family-m);
  font-style: italic;
  font-size: clamp(1.8rem, 2.3vw, 2.5rem);
  text-align: center;
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: .02em;
}
.stairs-unit .inner > p {
  max-width: 60em;
  margin: 0.5em auto 0;
  text-align: center;
}
/* ===== 共通リセット（最小限） ===== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
/* stairs-unit専用スタイル */
body.stairs-unit {
  background: #0d2b50;
}
.stairs-unit .container {
  max-width: 1100px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
  background: #0d2b50;
}
@media screen and (max-width: 985px) {
  .stairs-unit .container {
    padding-left: 20px;
    padding-right: 20px;
  }
}
/* ===== 背景セクション全幅 & 中央寄せ用 ===== */
/* セクション構造共通：背景100%、内側中央寄せ */
.stairs-unit section {
  width: 100%;
  padding: 40px 0px 80px 0;
}
.stairs-unit .inner {
  max-width: 1100px;
  margin: 0 auto;
  padding-left: 20px;
  padding-right: 20px;
}
/* 2種類の色パターン */
.stairs-unit .section-dark {
  background-color: #EFEFEF;
  color: #000000;
}
.stairs-unit .section-white {
  background-color: #FFFFFF;
  color: #000000;
}
@media screen and (max-width: 985px) {
  .stairs-unit section {
    width: 100%;
    padding: 30px 0px 40px 0;
  }
  .stairs-unit .inner {
    max-width: 100%;
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
  }
}
/* ===== PC/SP ===== */
.stairs-unit .SP {
  display: none !important;
}
@media screen and (max-width: 985px) {
  .stairs-unit .SP {
    display: block !important;
  }
  .stairs-unit .PC {
    display: none !important;
  }
}
/* ===== ヘッダー ===== */
.stairs-unit .site-header {
  width: 100%;
  padding: 10px 20px;
  background-color: #17823B;
}
.stairs-unit .header-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.stairs-unit .site-header .site-logo img {
  width: 40%;
  height: auto;
  display: block;
}
.stairs-unit .site-header h2.header-copy {
  color: #fff;
  font-size: 1.8rem;
  font-weight: 600;
  font-family: var(--font-family-m);
  margin: 0;
  white-space: nowrap;
}
.stairs-unit .header-right {
  flex-shrink: 0;
  margin-left: 1rem;
}
@media screen and (max-width: 985px) {
  .stairs-unit .header-inner {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
    text-align: left;
    padding: 0 16px;
  }
  .stairs-unit .site-header {
    width: 100%;
    padding: 10px 0px;
    background-color: #0d2b50;
  }
  .stairs-unit .site-logo {
    display: block;
    margin: 0;
  }
  .stairs-unit .site-logo img {
    width: 40%;
    height: auto;
    min-width: 120px;
  }
  .stairs-unit .site-header h2.header-copy {
    font-size: 1rem;
    margin: 0;
  }
}
/* ===== 共通ボタン（今すぐ無料相談・資料請求） ===== */
.stairs-unit .btn-wrapper {
  text-align: center;
  margin: 60px auto 40px;
}
.stairs-unit .cta-button {
  display: inline-block;
  background-color: #f5a623;
  color: #000;
  padding: 10px 40px;
  margin-top: 20px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  font-size: 2.0rem;
  transition: background-color 0.3s;
  text-align: center;
}
.stairs-unit .cta-button:hover {
  background-color: #C96C10;
}
/* ===== 濃紺ボタン=====*/
.stairs-unit .navy-button {
  display: inline-block;
  background-color: #0d2b50;
  color: #fff;
  padding: 10px 40px;
  margin-bottom: 10px;
  border-radius: 5px;
  text-decoration: none;
  font-weight: bold;
  font-size: 2.0rem;
  transition: background-color 0.3s;
}
.stairs-unit .navy-button:hover {
  background-color: #030622;
}
/* =============== 
トップイメージ（動画）
=============== */
/* ====== レイアウト ====== */
.hero-video {
  width: 100%;
  /* 余白はお好みで */
  margin: 0;
}
.hero-video__inner {
  position: relative;
  width: 100%;
  /* 16:9。必要なら 56.25%→好みで調整 */
  aspect-ratio: 16 / 9;
  overflow: hidden;
}
/* YouTubeを全面にフィット */
.hero-video iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}
/* 読みやすさ用の薄いグラデ被せ */
.hero-video__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(0deg, rgba(0, 0, 0, .45), rgba(0, 0, 0, .25));
  pointer-events: none;
}
/* 真ん中に文字を配置 */
.hero-video__copy {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  text-align: center;
  gap: .35em;
  padding: clamp(12px, 3vw, 32px);
  color: #fff;
  text-shadow: 0 2px 8px rgba(0, 0, 0, .35);
  pointer-events: none; /* クリックは動画に通す */
}
/* タイポ（サイズはclampで可変） */
.hero-video__copy h2 {
  font-size: clamp(18px, 3.6vw, 40px);
  font-weight: 800;
  letter-spacing: .02em;
  margin: 0;
}
.hero-video__copy p {
  font-size: clamp(14px, 2.2vw, 24px);
  font-weight: 700;
  margin: 0;
}
.hero-video__copy small {
  font-size: clamp(12px, 1.6vw, 16px);
  opacity: .9;
}
/* スマホ上下余白*/
@media (max-width: 600px) {
  .hero-video__copy {
    gap: .5em;
  }
}
/* ======================================================
                    コンテンツごとの設定
======================================================= */

/* ================ 
 メッセージ
================ */
.stairs-unit .message img{
width: 90%;
height: auto;
margin:10px auto;
display: block;
}

/* ================ 
   プレカットパーツ例
   完成例
================ */
.stairs-unit .works__header {
  text-align: center;
  margin: 6rem 0 1rem;
}
.stairs-unit .works__grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: clamp(12px, 2.5vw, 20px);
  grid-template-columns: repeat(4, minmax(0, 1fr)); /* ← 4枚並び */
}
/* 各カード */
.stairs-unit .works__figure {
  margin: 0;
}
.stairs-unit .works__media {
  aspect-ratio: 3/4; 
  overflow: hidden;
  background: #f5f5f5;
}
.stairs-unit .works__media img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* トリミングして均一に見せる */
  object-position: center;
  display: block;
}
.stairs-unit .works__cap {
  margin-top: .5em;
  text-align: center;
  font-size: clamp(12px, 1.6vw, 14px);
  line-height: 1.5;
}
/* レスポンシブ */
@media (max-width: 1024px) {
  .stairs-unit .works__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)); /* タブレットは2列 */
  }
}
@media (max-width: 640px) {
  .stairs-unit .works__grid {
    grid-template-columns: 1fr; /* スマホは1列（2列が良ければ repeat(2,1fr) に） */
  }
}
/* ========== 
  導入事例
 ========== */
.stairs-unit .cases__header {
  text-align: center;
  margin: 2.2rem 0 1.2rem;
}
.stairs-unit .cases__grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: clamp(14px, 2.4vw, 22px);
  grid-template-columns: repeat(4, minmax(0, 1fr)); /* 4列 */
}
.stairs-unit .cases__figure {
  margin: 0;
}
.stairs-unit .cases__link {
  display: block;
  text-decoration: none;
  color: inherit;
}
.stairs-unit .cases__media {
  aspect-ratio: 3 / 4; /* 縦写真を統一 */
  overflow: hidden;
}
.stairs-unit .cases__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform .35s ease, filter .35s ease;
}
.stairs-unit .cases__link:hover .cases__media img {
  transform: scale(1.03);
  filter: saturate(1.05);
}
.stairs-unit .cases__cap {
  text-align: center;
  font-size: clamp(12px, 1.6vw, 14px);
  line-height: 1.6;
  margin-top: .55em;
  min-height: 2.4em; /* 1行/2行でも高さ揃え */
}
/* レスポンシブ */
@media (max-width: 1200px) {
  .stairs-unit .cases__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (max-width: 900px) {
  .stairs-unit .cases__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 560px) {
  .stairs-unit .cases__grid {
    grid-template-columns: 1fr;
  }
  .stairs-unit .cases__cap {
    min-height: 0;
  }
}
/* =============== 
　発注〜納品の流れ
 =============== */
.stairs-unit .flow__header {
  text-align: center;
  margin: 2.2rem 0 1.2rem;
}
.stairs-unit .flow__grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  grid-template-columns: repeat(5, minmax(120px, 1fr));
  gap: clamp(12px, 2.4vw, 28px);
  align-items: start;
  position: relative;
}
.stairs-unit .flow__item {
  text-align: center;
  position: relative;
  scroll-snap-align: start;
}
/* ステップバッジ */
.stairs-unit .flow__step {
  display: inline-block;
  font-size: clamp(10px, 1.2vw, 12px);
  letter-spacing: .06em;
  font-weight: 700;
  background: #111;
  color: #fff;
  border-radius: 999px;
  padding: .28em .7em;
  margin-bottom: .5em;
}
/* アイコン：枠を固定して高さ揃え */
.stairs-unit .flow__icon {
  width: clamp(64px, 10vw, 96px);
  height: clamp(64px, 10vw, 96px);
  margin: 0 auto;
  display: grid;
  place-items: center;
  position: relative; /* コネクタの基準 */
}
.stairs-unit .flow__icon img {
  width: 100%;
  height: 100%;
  object-fit: contain; /* 画像全体を収める */
  display: block;
}
/* テキスト：smallの有無で高さがズレないように調整 */
.stairs-unit .flow__text {
  margin: .6em 0 0;
  line-height: 1.5;
  font-weight: 700;
}
.stairs-unit .flow__text small {
  display: block; /* サブ行は必ず改行 */
  color: #666;
  font-weight: 600;
}
/* smallが無い場合も1行分の余白を付与（:has非対応対策としてmin-heightも） */
.stairs-unit .flow__text:not(:has(small))::after {
  content: "";
  display: block;
  height: 1.2em; /* small 1行分 */
}
.stairs-unit .flow__text {
  min-height: 2.8em;
}
/* 点線コネクタ */
.stairs-unit .flow__item:not(:last-child) .flow__icon::after {
  content: "";
  position: absolute;
  top: 50%;
  left: calc(100% + clamp(6px, 1.2vw, 14px));
  transform: translateY(-50%); /* 垂直センタリング */
  width: clamp(28px, 5vw, 64px);
  height: 2px;
  background: repeating-linear-gradient(90deg, #bbb 0 8px, transparent 8px 14px);
  pointer-events: none;
}
/* 1200px以下は列幅を少しタイトに */
@media (max-width: 1200px) {
  .stairs-unit .flow__grid {
    grid-template-columns: repeat(5, minmax(100px, 1fr));
  }
}
/* タブレット〜小さめ端末：横スクロール＆スナップ */
@media (max-width: 900px) {
  .stairs-unit .flow__grid {
    grid-auto-flow: column;
    grid-auto-columns: 80%; /* 1画面に1〜1.2枚 */
    overflow-x: auto;
    padding-bottom: .4rem;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }
}
/* --- スマホ：1〜3が1段目、4・5は中央に2段目配置（Grid 6列版） --- */
@media (max-width: 640px) {
  .stairs-unit .flow__grid {
    grid-auto-flow: initial; /* 横スクロールを解除 */
    grid-auto-columns: initial;
    overflow: visible;
    grid-template-columns: repeat(6, 1fr); /* 6列グリッド */
    justify-items: center;
  }
  /* 各アイテムは基本2カラムぶち抜き（= 3枚で1行） */
  .stairs-unit .flow__item {
    grid-column: span 2;
  }
  /* 2段目の配置：左右に1カラムずつ余白を作って中央寄せ */
  .stairs-unit .flow__item:nth-child(4) {
    grid-column: 2 / span 2;
  } /* 列2-3 */
  .stairs-unit .flow__item:nth-child(5) {
    grid-column: 4 / span 2;
  } /* 列4-5 */
  /* 少しだけ縮小（任意） */
  .stairs-unit .flow__icon {
    width: clamp(52px, 18vw, 72px);
    height: clamp(52px, 18vw, 72px);
  }
  .stairs-unit .flow__step {
    font-size: 10px;
  }
}
/* =============== 
　　お客様の声
=============== */
.stairs-unit .voices__header {
  text-align: center;
  margin: 2.4rem 0 1.4rem;
}
.stairs-unit .voices__grid {
  list-style: none;
  padding: 0;
  margin: 0;
  display: grid;
  gap: clamp(14px, 2.4vw, 24px);
  grid-template-columns: repeat(3, minmax(260px, 1fr)); /* PC 3列 */
}
.voice .voice__figure {
  margin: 0;
  background: #fff;
  border: 1px solid #eee;
  border-radius: 10px;
  padding: clamp(14px, 2.2vw, 20px);
  display: flex;
  flex-direction: column;
  height: 100%;
  box-shadow: 0 2px 8px rgba(0, 0, 0, .04);
}
/* 引用テキスト */
.voice .voice__quote {
  margin: 0 0 .9em 0;
  font-size: clamp(14px, 1.9vw, 16px);
  line-height: 1.9;
  position: relative;
  font-weight: 600;
}
/* 会社名など */
.voice .voice__meta {
  margin-top: auto; /* カード下に固定 */
  display: flex;
  flex-direction: column;
  gap: .2em;
  color: #333;
}
.voice .voice__name {
  font-weight: 800;
  font-size: clamp(12px, 1.6vw, 14px);
}
.voice .voice__note {
  font-size: clamp(11px, 1.4vw, 13px);
  color: #666;
}
@media (max-width: 1024px) {
  .stairs-unit .voices__grid {
    grid-template-columns: repeat(2, minmax(0, 1fr)); /* タブレット 2列 */
  }
}
@media (max-width: 600px) {
  .stairs-unit .voices__grid {
    grid-template-columns: 1fr; /* スマホ 1列 */
  }
  .voice .voice__quote::before {
    font-size: 2em;
  }
}
/* ===== =====  =====  =====  
　　無料サンプル請求
=====  =====  =====  ===== */
.stairs-unit .sample-cta__wrap {
  text-align: center;
  max-width: 880px;
  margin: 0 auto;
  padding: clamp(24px, 6vw, 56px) 0;
}
.stairs-unit .sample-cta__title {
  font-weight: 900;
  font-style: italic;
  letter-spacing: .02em;
  font-size: clamp(22px, 3.6vw, 40px);
  margin: 0 0 .35em;
}
.stairs-unit .sample-cta__lead {
  margin: 0 0 1em;
  color: #555;
  font-weight: 700;
  font-size: clamp(12px, 1.6vw, 14px);
}
/* 画像（中央＋ドロップシャドウ） */
.stairs-unit .sample-cta__image {
  display: grid;
  place-items: center;
  margin: .2em auto .6em;
}
.stairs-unit .sample-cta__image img {
  width: clamp(220px, 42vw, 560px);
  height: auto;
  display: block;
  filter: drop-shadow(0 10px 22px rgba(0, 0, 0, .18));
  transform: translateZ(0);
}
/* テキストリンク */
.stairs-unit .sample-cta__text {
  margin: .2em 0 0;
  font-weight: 700;
  font-size: clamp(13px, 1.8vw, 16px);
}
.stairs-unit .sample-cta__link {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: .18em;
  transition: opacity .15s ease;
}
.stairs-unit .sample-cta__link:hover {
  opacity: .8;
}
/* スマホ微調整 */
@media (max-width: 560px) {
  .stairs-unit .sample-cta__wrap {
    padding: 28px 0;
  }
  .stairs-unit .sample-cta__image img {
    width: clamp(220px, 64vw, 480px);
  }
}
/* 画像リンクのアクセシビリティ＆ホバー */
.stairs-unit .sample-cta__image-link {
  display: inline-grid;
  place-items: center;
  text-decoration: none;
}
.stairs-unit .sample-cta__image img {
  transition: transform .15s ease, filter .15s ease;
}
.stairs-unit .sample-cta__image-link:hover img {
  transform: translateZ(0) translateY(-2px);
  filter: drop-shadow(0 14px 28px rgba(0, 0, 0, .22));
}
.stairs-unit .sample-cta__image-link:focus-visible {
  outline: 3px solid #111;
  outline-offset: 6px;
  border-radius: 12px;
}
/* ===============
　　見積・DL 
=============== */
.stairs-unit .estimate-cta__header {
  text-align: center;
  margin: 2.4rem 0 1.2rem;
}
.stairs-unit .estimate-cta__grid {
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: clamp(16px, 4vw, 40px);
  align-items: start;
}
/* DLカード */
.stairs-unit .dl-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: clamp(10px, 2.2vw, 16px);
}
.stairs-unit .dl-item {
  margin: 0;
}
.stairs-unit .dl-card {
  display: flex;
  align-items: center;
  gap: clamp(10px, 2vw, 16px);
  padding: clamp(10px, 2.2vw, 14px);
  border: 1px solid #eee;
  border-radius: 12px;
  background: #fff;
  color: #111;
  text-decoration: none;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.stairs-unit .dl-card:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, .08);
  border-color: #e5e5e5;
}
.stairs-unit .dl-icon {
  flex: 0 0 auto;
  color: #111;
}
.stairs-unit .dl-text {
  display: flex;
  flex-direction: column;
}
.stairs-unit .dl-text strong {
  font-weight: 800;
  font-size: clamp(14px, 2vw, 16px);
}
.stairs-unit .dl-text small {
  color: #666;
  font-weight: 700;
  font-size: clamp(12px, 1.6vw, 13px);
}
/* 種別ごとの色アクセント（任意） */
.stairs-unit .dl-card.is-pdf .dl-icon {
  color: #111;
}
.stairs-unit .dl-card.is-xls .dl-icon {
  color: #111;
}
.stairs-unit .dl-card:focus-visible {
  outline: 3px solid #111;
  outline-offset: 4px;
}
/* 右プレビュー */
.stairs-unit .estimate-cta__preview {
  margin: 0;
  text-align: center;
}
.stairs-unit .estimate-cta__preview img {
  width: clamp(240px, 38vw, 420px);
  height: auto;
  display: block;
  margin: 0 auto;
  border-radius: 8px;
  border: 1px solid #eee;
  background: #fff;
  box-shadow: 0 10px 24px rgba(0, 0, 0, .08);
  transition: transform .15s ease, box-shadow .15s ease;
}
.stairs-unit .estimate-cta__preview .preview-link:hover img {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(0, 0, 0, .12);
}
.stairs-unit .estimate-cta__preview figcaption {
  margin-top: .6em;
  color: #666;
  font-size: clamp(12px, 1.6vw, 13px);
  font-weight: 700;
}
@media (max-width: 980px) {
  .stairs-unit .estimate-cta__grid {
    grid-template-columns: 1fr; /* 縦並び */
    justify-items: center;
  }
  .stairs-unit .estimate-cta__preview img {
    width: clamp(260px, 64vw, 520px);
  }
}
/* =============== 
   連絡先
=============== */
.stairs-unit .contact__wrap {
  text-align: center;
  max-width: 780px;
  margin: 0 auto;
  padding: clamp(28px, 6vw, 64px) 0;
}
.stairs-unit .contact__lead {
  font-weight: 800;
  font-style: italic;
  letter-spacing: .02em;
  color: #111;
  margin: 0 0 .6em;
  font-size: clamp(16px, 2.2vw, 20px);
}
/* ロゴ＋社名（横並びで中央） */
.stairs-unit .contact__brand {
  display: inline-flex;
  align-items: center;
  gap: clamp(8px, 1.6vw, 14px);
  margin-bottom: .4em;
}
.stairs-unit .contact__logo {
  width: 300px;
  height: auto;
  display: block;
}
.stairs-unit .contact__name {
  margin: 0;
  font-weight: 900;
  font-size: clamp(22px, 3.6vw, 40px);
  letter-spacing: .06em;
}
/* TEL/FAX/Mail を1行表示・中央揃え */
.stairs-unit .contact__list {
  list-style: none;
  padding: 0;
  margin: .4em auto 0;
}
.stairs-unit .contact__row {
  display: block; /* ← flexをやめて1行テキストに */
  line-height: 1.6;
  margin: .05em 0;
  white-space: nowrap; /* 折り返し防止（長い場合は後のSPで緩める） */
}
.stairs-unit .contact__label {
  display: inline; /* 横並び */
  font-weight: 900;
  letter-spacing: .04em;
  margin-right: .45em; /* 「TEL 〇〇」間の余白 */
}
.stairs-unit .contact__value {
  display: inline;
  font-weight: 800;
  text-decoration: none;
  color: #111;
  font-size: clamp(14px, 2vw, 18px);
}
.stairs-unit a.contact__value:hover {
  text-decoration: underline;
  text-underline-offset: .18em;
}
/* 注意書き＋ボタン（必要な場合のみ） */
.stairs-unit .contact__note {
  margin: .9em 0 1.15em;
  color: #555;
  font-weight: 700;
  font-size: clamp(12px, 1.6vw, 14px);
}
.stairs-unit .contact__actions {
  margin: 0;
}
.stairs-unit .contact__btn {
  display: inline-block;
  border: 2px solid #222;
  border-radius: 999px;
  padding: .68em 1.8em;
  background: #fff;
  color: #000;
  text-decoration: none;
  font-weight: 800;
  transition: transform .15s ease, filter .15s ease;
  font-size: clamp(13px, 1.9vw, 16px);
}
.stairs-unit .contact__btn:hover {
  transform: translateY(-1px);
  filter: brightness(.95);
}
/* スマホ調整（狭い時は折返し許可） */
@media (max-width: 420px) {
  .stairs-unit .contact__row {
    white-space: normal;
  }
  .stairs-unit .contact__logo {
    width: 80%;
    height: auto;
    display: block;
  }
}