/* 株式会社岩建ホームテック様 ご提案用デモ
   方向: 「地域密着の安心感」×「軽やかな親しみやすさ」。白地に現行サイト踏襲の青、CTAのみ暖色。
   詳細は design-ref.md 参照。他デモの style.css は流用していない（白紙から作成）。 */

@import url("https://fonts.googleapis.com/css2?family=Kosugi+Maru&family=Noto+Sans+JP:wght@400;500;700;900&display=swap");

:root{
  --bg:#f5f9ff;
  --panel:#ffffff;
  --ink:#16283f;
  --ink-soft:#4a5b73;
  --blue:#1c5fc9;
  --blue-dark:#123e85;
  --blue-tint:#eaf2fd;
  --accent:#dd6a35;
  --accent-dark:#b8511f;
  --line:#dbe4f0;
  --radius:16px;
  --radius-sm:10px;
  --shadow:0 14px 34px -18px rgba(18,49,110,.35);
  --font-head:"Kosugi Maru","Zen Kaku Gothic New",system-ui,sans-serif;
  --font-body:"Noto Sans JP",system-ui,-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",sans-serif;
}

*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--font-body);font-size:16px;line-height:1.8;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit}
h1,h2,h3,h4{font-family:var(--font-head);line-height:1.5;margin:0}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
.inner{max-width:1120px;margin:0 auto;padding:0 24px}

/* ============ デモ帯 ============ */
.demo-bar{background:#0f2d5c;color:#fff;font-size:.85rem;line-height:1.6}
.demo-bar .inner{display:flex;flex-wrap:wrap;gap:4px 20px;padding:10px 24px;max-width:1120px}
.demo-bar a{color:#bcd6ff;text-decoration:underline}

/* ============ ヘッダー ============ */
.header{background:#fff;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:40}
.header-inner{
  max-width:1320px;margin:0 auto;padding:12px 24px;
  display:flex;align-items:center;gap:16px;flex-wrap:nowrap;
}
.brand{display:flex;flex-direction:column;text-decoration:none;color:var(--ink);line-height:1.3;flex:0 1 auto;min-width:0}
.brand .name{font-family:var(--font-head);font-weight:700;font-size:1.22rem;white-space:nowrap}
.brand small{font-size:.76rem;color:var(--ink-soft);white-space:nowrap;max-width:260px;overflow:hidden;text-overflow:ellipsis}

.gnav ul{display:flex;gap:18px;flex-wrap:nowrap}
.gnav a{text-decoration:none;font-weight:700;font-size:.92rem;color:var(--ink);white-space:nowrap}
.gnav a[aria-current="page"]{color:var(--blue)}

.header-actions{display:flex;align-items:center;gap:14px;margin-left:auto;flex:none}
.tel-link{text-decoration:none;color:var(--ink);text-align:right;line-height:1.3;white-space:nowrap}
.tel-link b{display:block;font-size:1.1rem;color:var(--blue-dark);font-family:var(--font-head);white-space:nowrap}
.tel-link small{font-size:.76rem;color:var(--ink-soft);white-space:nowrap}
.btn-head{
  background:var(--accent);color:#fff;text-decoration:none;font-weight:700;
  padding:.7em 1.3em;border-radius:999px;white-space:nowrap;font-size:.95rem;
  box-shadow:0 8px 18px -8px rgba(221,106,53,.6);
}
.btn-head:hover{background:var(--accent-dark)}

.nav-toggle{
  display:none;flex:none;width:44px;height:44px;border:1px solid var(--line);border-radius:10px;
  background:#fff;position:relative;padding:0;cursor:pointer;
}
.nav-toggle span,.nav-toggle span::before,.nav-toggle span::after{
  content:"";position:absolute;left:11px;right:11px;height:2px;background:var(--ink);border-radius:2px;
}
.nav-toggle span{top:21px}
.nav-toggle span::before{top:-8px}
.nav-toggle span::after{top:8px}
.nav-toggle[aria-expanded="true"] span{background:transparent}
.nav-toggle[aria-expanded="true"] span::before{transform:translateY(8px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span::after{transform:translateY(-8px) rotate(-45deg)}

@media (max-width:1020px){
  .gnav{
    position:fixed;inset:0;top:65px;background:#fff;
    padding:26px 24px 100px;overflow-y:auto;
    opacity:0;visibility:hidden;transition:opacity .2s ease,visibility .2s ease;
  }
  .gnav.open{opacity:1;visibility:visible}
  .gnav ul{flex-direction:column;gap:0}
  .gnav li{border-bottom:1px solid var(--line)}
  .gnav a{display:block;padding:16px 4px;font-size:1.08rem}
  .header-actions .tel-link{display:none}
  .nav-toggle{display:block}
  .header-actions{margin-left:auto}
}
@media (max-width:520px){
  .header-inner{gap:10px;padding:10px 16px}
  .brand{flex:0 1 auto;min-width:0}
  .brand .name{font-size:1.08rem;white-space:normal}
  .brand small{white-space:normal}
  .btn-head{padding:.62em 1em;font-size:.86rem}
  .nav-toggle{flex:none}
}

/* ============ ヒーロー ============ */
.hero{position:relative;background:var(--blue-dark);overflow:hidden}
.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.4}
.hero::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(180deg,rgba(10,32,70,.72),rgba(10,32,70,.55) 55%,rgba(10,32,70,.82));
}
.hero-copy{
  position:relative;max-width:1120px;margin:0 auto;padding:70px 24px 56px;
  min-height:min(58vh,460px);display:flex;flex-direction:column;justify-content:center;color:#fff;
}
.hero-tag{
  display:inline-flex;align-self:flex-start;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.4);
  color:#fff;font-size:.8rem;font-weight:700;padding:.4em 1em;border-radius:999px;margin-bottom:18px;
}
.hero-copy h1{font-size:2.2rem;font-weight:700;margin-bottom:18px}
.hero-copy .sub{font-size:1.05rem;max-width:640px;color:#eaf1ff;margin-bottom:26px}
.hero-cta{display:flex;flex-wrap:wrap;gap:14px}
.btn{
  display:inline-flex;align-items:center;justify-content:center;text-decoration:none;font-weight:700;
  padding:.95em 1.8em;border-radius:999px;font-size:1rem;border:2px solid transparent;
}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 10px 24px -10px rgba(221,106,53,.7)}
.btn-primary:hover{background:var(--accent-dark)}
.btn-ghost{background:rgba(255,255,255,.08);border-color:rgba(255,255,255,.55);color:#fff}
.btn-line{background:transparent;border-color:var(--blue);color:var(--blue-dark);padding:.8em 1.6em}

@media (max-width:720px){
  .hero-copy{padding:46px 20px 40px;min-height:0}
  .hero-copy h1{font-size:1.62rem}
}

/* ============ ページ見出し帯（下層ページ） ============ */
.page-head{position:relative;background:var(--blue-dark);overflow:hidden}
.page-head>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:.32}
.page-head::after{content:"";position:absolute;inset:0;background:rgba(11,33,72,.72)}
.page-head-copy{position:relative;max-width:1120px;margin:0 auto;padding:52px 24px;color:#fff;min-height:0}
.page-head-copy .eyebrow{color:#bcd6ff}
.page-head-copy h1{font-size:1.9rem;margin:.4em 0 .5em}
.page-head-copy p{color:#dfeaff;max-width:640px;margin-bottom:0}
@media (max-width:720px){
  .page-head-copy{padding:36px 20px}
  .page-head-copy h1{font-size:1.5rem}
}

/* ============ 信頼バッジ帯 ============ */
.trust{background:var(--blue-tint);border-bottom:1px solid var(--line)}
.trust .inner{
  display:grid;grid-template-columns:repeat(4,1fr);gap:18px;padding:22px 24px;
}
.trust .item{text-align:center}
.trust .item dt{font-size:.78rem;color:var(--blue-dark);font-weight:700;margin-bottom:.3em}
.trust .item dd{margin:0;font-family:var(--font-head);font-size:1.02rem;font-weight:700}
.trust .item small{display:block;font-family:var(--font-body);font-weight:400;font-size:.78rem;color:var(--ink-soft);margin-top:.2em}
@media (max-width:820px){
  .trust .inner{grid-template-columns:repeat(2,1fr)}
}

/* ============ セクション共通 ============ */
.section{padding:76px 0}
.section.soft{background:var(--blue-tint)}
.section.warm{background:#fff6f0}
.section.dark{background:var(--blue-dark);color:#fff}
.section.dark .section-head p{color:#dbe7ff}
.section-head{max-width:760px;margin:0 auto 40px;text-align:center}
.section-head .eyebrow{
  display:inline-block;font-size:.76rem;letter-spacing:.1em;font-weight:700;color:var(--blue);
  background:var(--blue-tint);padding:.35em 1em;border-radius:999px;margin-bottom:14px;
}
.section.dark .section-head .eyebrow{background:rgba(255,255,255,.14);color:#fff}
.section-head h2{font-size:1.7rem;margin-bottom:.5em}
.section-head p{color:var(--ink-soft);font-size:1rem;margin-bottom:0}
@media (max-width:720px){
  .section{padding:54px 0}
  .section-head h2{font-size:1.36rem}
}

/* ============ 会社紹介ミニ ============ */
.intro{display:grid;grid-template-columns:1.1fr .9fr;gap:44px;align-items:center}
.intro-media{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px}
.intro-media dl{margin:0}
.intro-media .row{display:flex;gap:14px;padding:10px 0;border-bottom:1px dashed var(--line)}
.intro-media .row:last-child{border-bottom:none}
.intro-media dt{flex:0 0 92px;font-weight:700;color:var(--blue-dark);font-size:.86rem}
.intro-media dd{margin:0;font-size:.92rem}
@media (max-width:900px){
  .intro{grid-template-columns:1fr}
}

/* ============ サービス（取扱いリフォーム） ============ */
.services-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.service-card{
  background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 22px;box-shadow:var(--shadow);
}
.service-badge{
  width:52px;height:52px;border-radius:14px;background:var(--blue-tint);color:var(--blue-dark);
  display:flex;align-items:center;justify-content:center;font-family:var(--font-head);font-weight:700;
  font-size:1.05rem;margin-bottom:16px;
}
.service-card h3{font-size:1.06rem;margin-bottom:.5em}
.service-card p{font-size:.9rem;color:var(--ink-soft);margin-bottom:0}
@media (max-width:900px){.services-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.services-grid{grid-template-columns:1fr}}

/* ============ 施工事例プレースホルダ ============ */
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.work-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);min-width:0}
.work-pic{
  aspect-ratio:4/3;background:repeating-linear-gradient(45deg,#e4edf9,#e4edf9 12px,#eef4fc 12px,#eef4fc 24px);
  display:flex;align-items:center;justify-content:center;color:var(--blue-dark);font-size:.86rem;text-align:center;padding:16px;
}
.work-body{padding:18px 20px}
.work-tag{display:inline-block;font-size:.76rem;font-weight:700;color:var(--blue-dark);background:var(--blue-tint);padding:.25em .8em;border-radius:999px;margin-bottom:.6em}
.work-body h3{font-size:1rem;margin-bottom:.4em}
.work-body p{font-size:.86rem;color:var(--ink-soft);margin-bottom:0}
@media (max-width:900px){.works-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.works-grid{grid-template-columns:1fr}}
.note{background:var(--panel);border:1px solid var(--line);border-left:4px solid var(--accent);border-radius:var(--radius-sm);padding:18px 20px}
.note h3{font-size:.98rem;margin-bottom:.4em}
.note p{font-size:.88rem;color:var(--ink-soft);margin-bottom:0}

/* ============ お客様の声 ============ */
.voice-card{
  max-width:720px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);
  box-shadow:var(--shadow);padding:30px 30px 26px;
}
.voice-head{display:flex;justify-content:space-between;align-items:baseline;flex-wrap:wrap;gap:8px;margin-bottom:14px}
.voice-head b{font-family:var(--font-head);font-size:1.04rem}
.voice-head span{font-size:.8rem;color:var(--ink-soft)}
.voice-quote{font-size:1.06rem;line-height:1.9;margin-bottom:0}
.voice-quote::before{content:"“";color:var(--blue);font-size:1.4em;margin-right:.05em}
.voice-quote::after{content:"”";color:var(--blue);font-size:1.4em;margin-left:.05em}
.voice-src{display:block;margin-top:16px;font-size:.78rem;color:var(--ink-soft)}

/* ============ 拠点 ============ */
.branch-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.branch-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow);min-width:0}
.branch-card h3{font-size:1.02rem;color:var(--blue-dark);margin-bottom:.5em}
.branch-card p{font-size:.86rem;color:var(--ink-soft);margin-bottom:.4em}
.branch-card .zip{font-size:.78rem;color:var(--ink-soft)}
@media (max-width:900px){.branch-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:520px){.branch-grid{grid-template-columns:1fr}}

/* ============ SNS ============ */
.sns-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-bottom:36px}
.sns-card{
  display:block;text-decoration:none;color:var(--ink);background:var(--panel);border:1px solid var(--line);
  border-radius:var(--radius);padding:22px;text-align:center;box-shadow:var(--shadow);min-width:0;
}
.sns-icon{
  width:48px;height:48px;border-radius:50%;background:var(--blue-dark);color:#fff;display:flex;
  align-items:center;justify-content:center;margin:0 auto 12px;font-family:var(--font-head);font-weight:700;
}
.sns-card b{display:block;font-size:.94rem;margin-bottom:.3em}
.sns-card span{font-size:.78rem;color:var(--ink-soft);word-break:break-all}
@media (max-width:900px){.sns-grid{grid-template-columns:repeat(2,1fr)}}

.feed-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feed-card{
  aspect-ratio:1/1;border-radius:var(--radius-sm);background:repeating-linear-gradient(135deg,#eef4fc,#eef4fc 10px,#e4edf9 10px,#e4edf9 20px);
  display:flex;align-items:center;justify-content:center;text-align:center;padding:14px;color:var(--blue-dark);font-size:.82rem;
}
@media (max-width:720px){.feed-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:460px){.feed-grid{grid-template-columns:1fr}}

/* ============ CTA帯 ============ */
.cta{background:linear-gradient(135deg,var(--blue-dark),var(--blue));color:#fff;padding:64px 0;text-align:center}
.cta h2{font-size:1.6rem;margin-bottom:.5em}
.cta p{color:#dfeaff;margin-bottom:28px}
.cta .hero-cta{justify-content:center}

/* ============ 流れ（ステップ） ============ */
.flow-phase{margin-bottom:52px}
.flow-phase:last-child{margin-bottom:0}
.flow-phase h3{
  font-size:1.16rem;color:var(--blue-dark);margin-bottom:22px;display:flex;align-items:center;gap:12px;
}
.flow-phase h3 .no{
  width:34px;height:34px;border-radius:50%;background:var(--blue);color:#fff;flex:none;
  display:flex;align-items:center;justify-content:center;font-family:var(--font-head);font-size:.94rem;
}
.steps{counter-reset:step;display:grid;gap:16px}
.steps li{
  position:relative;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius-sm);
  padding:18px 20px 18px 62px;box-shadow:var(--shadow);min-width:0;
}
.steps li::before{
  counter-increment:step;content:counter(step);position:absolute;left:18px;top:50%;transform:translateY(-50%);
  width:28px;height:28px;border-radius:50%;background:var(--blue-tint);color:var(--blue-dark);
  font-family:var(--font-head);font-weight:700;font-size:.86rem;display:flex;align-items:center;justify-content:center;
}
.steps h4{font-size:.98rem;margin-bottom:.3em}
.steps p{font-size:.86rem;color:var(--ink-soft);margin-bottom:0}

/* ============ 会社概要テーブル（横スクロールではなく縦積みの定義リストで統一。KB-013対策） ============ */
.info-list{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.info-list .row{display:grid;grid-template-columns:180px 1fr;gap:6px 20px;padding:16px 22px;border-bottom:1px solid var(--line)}
.info-list .row:last-child{border-bottom:none}
.info-list dt{margin:0;font-weight:700;color:var(--blue-dark);font-size:.88rem}
.info-list dd{margin:0;font-size:.92rem;line-height:1.75}
@media (max-width:640px){
  .info-list .row{grid-template-columns:1fr}
  .info-list dt{font-size:.8rem;color:var(--blue-dark)}
}

.philosophy{
  max-width:760px;margin:0 auto;background:var(--blue-dark);color:#fff;border-radius:var(--radius);
  padding:34px 32px;text-align:center;box-shadow:var(--shadow);
}
.philosophy p{font-size:1.08rem;line-height:2;margin-bottom:12px}
.philosophy span{font-size:.82rem;color:#bcd6ff}

.split{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.split.rev .split-media{order:-1}
.split-media img{border-radius:var(--radius);box-shadow:var(--shadow)}
.split-text h3{font-size:1.24rem;margin-bottom:.6em;color:var(--blue-dark)}
@media (max-width:820px){
  .split{grid-template-columns:1fr}
  .split.rev .split-media{order:0}
}

.person{display:flex;gap:24px;align-items:flex-start;flex-wrap:wrap;max-width:820px;margin:0 auto}
.person-photo{
  flex:0 0 120px;width:120px;height:120px;border-radius:50%;background:var(--blue-tint);color:var(--blue-dark);
  display:flex;align-items:center;justify-content:center;text-align:center;font-size:.78rem;line-height:1.5;
}
.person-name{font-family:var(--font-head);font-size:1.1rem;display:block;margin-bottom:.2em}
.person-role{font-size:.82rem;color:var(--ink-soft);display:block;margin-bottom:.8em}

/* ============ お問い合わせカード・フォーム ============ */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.card{background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);min-width:0}
.card h3{font-size:1rem;color:var(--blue-dark);margin-bottom:.6em}
.card .big{font-size:1.5rem;font-weight:700;font-family:var(--font-head);margin-bottom:.3em}
.card .big a{text-decoration:none;color:var(--ink)}
.card p{font-size:.88rem;color:var(--ink-soft);margin-bottom:0}
@media (max-width:900px){.cards{grid-template-columns:1fr}}

.form{max-width:720px;margin:0 auto;background:var(--panel);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:32px}
.field{margin-bottom:20px}
.field label{display:block;font-weight:700;font-size:.9rem;margin-bottom:.5em}
.req{background:var(--accent);color:#fff;font-size:.76rem;font-weight:700;border-radius:999px;padding:.15em .7em;margin-left:.5em}
.field input,.field select,.field textarea{
  width:100%;border:1px solid var(--line);border-radius:var(--radius-sm);padding:.85em 1em;font-size:1rem;
  font-family:var(--font-body);background:#fbfdff;color:var(--ink);
}
.field textarea{min-height:140px;resize:vertical}
.field input:focus,.field select:focus,.field textarea:focus{outline:2px solid var(--blue);outline-offset:1px}
.form-note{font-size:.8rem;color:var(--ink-soft)}
.form .btn-line{width:100%;border:none;background:var(--accent);color:#fff;font-size:1.02rem;cursor:pointer;padding:.95em 1.6em;border-radius:999px}
.form .btn-line:hover{background:var(--accent-dark)}

/* ============ フッター ============ */
.footer{background:#0f2447;color:#dbe7ff;padding:56px 0 26px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:32px;margin-bottom:34px}
.footer h3{color:#fff;font-size:.98rem;margin-bottom:.9em}
.footer p{font-size:.86rem;line-height:1.9;color:#c3d5f2;margin-bottom:.6em}
.footer ul li{margin-bottom:.55em}
.footer a{color:#c3d5f2;text-decoration:none;font-size:.86rem}
.footer a:hover{color:#fff}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.16);padding-top:20px;font-size:.76rem;color:#9db3d8;line-height:1.8;margin-bottom:0;
}
@media (max-width:820px){
  .footer-grid{grid-template-columns:1fr 1fr;gap:28px}
}
@media (max-width:520px){
  .footer-grid{grid-template-columns:1fr}
}

/* ============ スマホ固定バー ============ */
.sp-bar{
  display:none;position:fixed;left:0;right:0;bottom:0;z-index:50;
  grid-template-columns:1fr 1fr;box-shadow:0 -8px 20px -10px rgba(10,30,60,.3);
}
.sp-bar a{
  display:flex;align-items:center;justify-content:center;padding:14px 10px;font-weight:700;font-size:.92rem;
  text-decoration:none;color:#fff;
}
.sp-bar a:first-child{background:var(--blue-dark)}
.sp-bar a:last-child{background:var(--accent)}
@media (max-width:720px){
  .sp-bar{display:grid}
  body{padding-bottom:60px}
}
body.nav-open{overflow:hidden}