:root{
  --navy:#173a5e; --navy-d:#0f2942;
  --green:#1f7a3d; --emerald:#19c089;
  --ink:#1f2933; --muted:#5b6b7b; --line:#e3e8ee;
  --bg:#ffffff; --soft:#f4f8f6; --gold:#c9a24b;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:-apple-system,"Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;color:var(--ink);line-height:1.8;background:var(--bg)}
a{text-decoration:none;color:inherit}
img{max-width:100%}
.wrap{max-width:1080px;margin:0 auto;padding:0 22px}

/* Logo */
.logo{display:flex;align-items:center;gap:12px}
.logo svg{width:44px;height:44px;flex:none}
.logo .nm{line-height:1.25}
.logo .nm b{font-size:17px;font-weight:800;letter-spacing:.04em;color:var(--navy)}
.logo .nm small{display:block;font-size:10px;letter-spacing:.32em;color:var(--muted)}

/* Header */
header{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--line)}
.hbar{display:flex;align-items:center;padding:12px 0}
.hbar nav{display:flex;gap:26px;font-size:14px;font-weight:700;color:var(--navy)}
.hbar nav a:hover{color:var(--emerald)}
.hcta{margin-left:18px;background:var(--emerald);color:#fff;padding:10px 20px;border-radius:999px;font-weight:800;font-size:14px;box-shadow:0 6px 16px rgba(25,192,137,.35)}
.hcta:hover{background:#13a374}
.menu-links{display:flex;align-items:center;margin-left:auto;gap:14px}
.ig{display:grid;place-items:center;width:40px;height:40px;border-radius:10px;color:#fff;
  background:linear-gradient(45deg,#f09433,#e6683c 25%,#dc2743 50%,#cc2366 75%,#bc1888);flex:none}
.ig svg{width:21px;height:21px}
.ig:hover{opacity:.88}
@media(max-width:820px){.hbar nav{display:none}.hcta{margin-left:auto}}

.btn{display:inline-flex;align-items:center;gap:8px;padding:15px 30px;border-radius:12px;font-weight:800;font-size:15.5px;transition:.2s}
.btn-main{background:var(--emerald);color:#fff;box-shadow:0 10px 24px rgba(25,192,137,.4)}
.btn-main:hover{transform:translateY(-2px);background:#13a374}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.45)}
.btn-ghost:hover{background:rgba(255,255,255,.2)}

section{padding:64px 0}
.eyebrow{text-align:center;color:var(--emerald);font-weight:800;letter-spacing:.18em;font-size:12.5px;margin-bottom:10px}
.stitle{text-align:center;font-size:28px;font-weight:900;color:var(--navy);margin-bottom:12px}
.ssub{text-align:center;color:var(--muted);max-width:640px;margin:0 auto 46px}
@media(max-width:820px){.stitle{font-size:23px}}

/* CTA band */
.ctaband{background:linear-gradient(120deg,var(--navy),var(--green));color:#fff;text-align:center}
.ctaband h2{font-size:26px;font-weight:900;margin-bottom:12px}
.ctaband p{opacity:.93;margin-bottom:24px}
.ctaband .tel{font-size:32px;font-weight:900;letter-spacing:.02em}
.ctaband .tel a{color:#fff}
.ctaband small{display:block;opacity:.85;font-size:13px;margin-top:4px}

/* Footer */
footer{background:var(--navy-d);color:#cdd8e3;padding:40px 0 28px;font-size:13px}
.fbar{display:flex;align-items:center;flex-wrap:wrap;gap:16px}
footer .logo .nm b{color:#fff}
footer .logo .nm small{color:#9fb2c4}
.fcopy{margin-left:auto;opacity:.8}
@media(max-width:820px){.fcopy{margin-left:0;width:100%}}

/* ===== Works (施工事例) ===== */
.breadcrumb{font-size:12.5px;color:var(--muted);padding:16px 0}
.breadcrumb a:hover{color:var(--emerald)}
.works-head{background:var(--soft);border-bottom:1px solid var(--line)}
.tagpill{display:inline-block;background:var(--emerald);color:#fff;font-size:12px;font-weight:800;padding:5px 14px;border-radius:999px;letter-spacing:.04em}
.case-title{font-size:30px;font-weight:900;color:var(--navy);line-height:1.4;margin:14px 0 10px}
@media(max-width:820px){.case-title{font-size:23px}}
.case-lead{color:var(--muted);max-width:760px}

.ba-grid{display:grid;grid-template-columns:1fr auto 1fr;gap:16px;align-items:center;margin:8px 0 10px}
@media(max-width:820px){.ba-grid{grid-template-columns:1fr;gap:12px}}
.ba figure{margin:0;border:1px solid var(--line);border-radius:16px;overflow:hidden;background:#fff;position:relative}
.ba img{display:block;width:100%;aspect-ratio:3/4;object-fit:cover}
.ba .lab{position:absolute;top:12px;left:12px;background:rgba(20,22,24,.86);color:#fff;font-size:13px;font-weight:800;padding:5px 14px;border-radius:10px;letter-spacing:.05em}
.ba .lab.after{background:var(--emerald)}
.ba-arrow{display:grid;place-items:center;color:var(--emerald);font-size:34px;font-weight:900}
@media(max-width:820px){.ba-arrow{transform:rotate(90deg)}}

.case-body{max-width:820px;margin:0 auto}
.case-body h2{font-size:21px;font-weight:900;color:var(--navy);margin:34px 0 12px;padding-left:14px;border-left:5px solid var(--emerald)}
.case-body p{margin-bottom:14px}
.case-body .pt{background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:18px 20px;margin:8px 0}
.case-body .pt b{color:var(--green)}
.spec{width:100%;border-collapse:collapse;font-size:14.5px;margin:6px 0 4px}
.spec th,.spec td{text-align:left;padding:12px 6px;border-bottom:1px solid var(--line);vertical-align:top}
.spec th{width:32%;color:var(--navy);font-weight:800;white-space:nowrap}
.gallery{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:10px 0}
@media(max-width:560px){.gallery{grid-template-columns:1fr}}
.gallery figure{margin:0;border:1px solid var(--line);border-radius:14px;overflow:hidden}
.gallery img{display:block;width:100%;aspect-ratio:4/3;object-fit:cover}
.gallery figcaption{font-size:12.5px;color:var(--muted);padding:8px 12px}

/* Works list (一覧) */
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
@media(max-width:820px){.works-grid{grid-template-columns:1fr 1fr}}
@media(max-width:520px){.works-grid{grid-template-columns:1fr}}
.wcard{display:block;border:1px solid var(--line);border-radius:18px;overflow:hidden;background:#fff;transition:.25s}
.wcard:hover{transform:translateY(-6px);box-shadow:0 18px 40px rgba(23,58,94,.12);border-color:transparent}
.wcard .thumb{position:relative;aspect-ratio:4/3;overflow:hidden}
.wcard .thumb img{width:100%;height:100%;object-fit:cover}
.wcard .thumb .cat{position:absolute;top:10px;left:10px;background:var(--emerald);color:#fff;font-size:11px;font-weight:800;padding:4px 11px;border-radius:999px}
.wcard .body{padding:16px 18px}
.wcard .area{font-size:12px;color:var(--muted)}
.wcard h3{font-size:16px;font-weight:800;color:var(--navy);margin-top:4px;line-height:1.4}