/* ===== Reset & Variables ===== */
*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
:root{
  --navy:#001F6D;
  --navy-dark:#001450;
  --red:#C2001C;
  --red-dark:#9E0017;
  --gold:#C4993A;
  --gold-light:#E8D5A3;
  --wood:#8B6914;
  --bg:#fff;
  --bg-light:#F7F8FA;
  --bg-warm:#FBF9F5;
  --text:#1A1A1A;
  --text-light:#555;
  --text-lighter:#888;
  --border:#E0E0E0;
  --font:'Noto Sans JP',sans-serif;
  --font-serif:'Noto Serif JP',serif;
  --max-w:1200px;
  --header-h:80px;
  --radius:8px;
  --shadow:0 4px 24px rgba(0,0,0,0.08);
  --shadow-lg:0 12px 48px rgba(0,0,0,0.12);
}
html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.8;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}

/* ===== Utility ===== */
.container{max-width:var(--max-w);margin:0 auto;padding:0 24px}
.text-center{text-align:center}
.text-navy{color:var(--navy)}
.text-red{color:var(--red)}
.bg-navy{background:var(--navy);color:#fff}
.bg-light{background:var(--bg-light)}
.bg-warm{background:var(--bg-warm)}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:16px 40px;border-radius:9999px;font-size:0.95rem;font-weight:700;
  transition:all .3s;cursor:pointer;border:none;letter-spacing:.05em;
}
.btn-red{background:var(--red);color:#fff}
.btn-red:hover{background:var(--red-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-navy{background:var(--navy);color:#fff}
.btn-navy:hover{background:var(--navy-dark);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-outline{background:transparent;color:var(--navy);border:2px solid var(--navy)}
.btn-outline:hover{background:var(--navy);color:#fff}
.btn-white{background:#fff;color:var(--navy)}
.btn-white:hover{background:var(--bg-light);transform:translateY(-2px);box-shadow:var(--shadow)}
.btn-sm{padding:10px 24px;font-size:0.85rem}
.btn svg,.btn-arrow{width:18px;height:18px;transition:transform .3s}
.btn:hover .btn-arrow{transform:translateX(4px)}

/* ===== Header ===== */
.header{
  position:fixed;top:0;left:0;right:0;z-index:1000;
  background:rgba(255,255,255,0.97);backdrop-filter:blur(12px);
  border-bottom:1px solid transparent;transition:border-color .3s,box-shadow .3s;
}
.header.scrolled{border-bottom-color:var(--border);box-shadow:0 2px 16px rgba(0,0,0,0.04)}
.header-top{background:var(--navy);color:#fff;padding:6px 0;font-size:.75rem}
.header-top .container{display:flex;justify-content:space-between;align-items:center}
.header-top-phone{font-weight:700;font-size:.85rem;letter-spacing:.03em}
.header-main{height:var(--header-h);display:flex;align-items:center;justify-content:space-between}
.header-main .container{display:flex;align-items:center;justify-content:space-between;width:100%}

.logo{display:flex;align-items:center;gap:12px;flex-shrink:0}
.logo-icon svg{width:40px;height:40px}
.logo-text{display:flex;flex-direction:column}
.logo-main{font-family:var(--font-serif);font-size:1.3rem;font-weight:700;color:var(--navy);line-height:1.2}
.logo-sub{font-size:.6rem;color:var(--text-lighter);letter-spacing:.06em}

.nav{display:flex;gap:28px;align-items:center}
.nav-link{font-size:.85rem;font-weight:500;color:var(--text);transition:color .3s;position:relative;white-space:nowrap}
.nav-link::after{content:'';position:absolute;bottom:-4px;left:0;width:0;height:2px;background:var(--red);transition:width .3s}
.nav-link:hover{color:var(--navy)}
.nav-link:hover::after{width:100%}

.header-cta{display:flex;gap:8px;flex-shrink:0}
.header-cta .btn{padding:10px 20px;font-size:.8rem;border-radius:6px}

.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.hamburger span{display:block;width:24px;height:2px;background:var(--text);transition:transform .3s,opacity .3s}
.hamburger.active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.hamburger.active span:nth-child(2){opacity:0}
.hamburger.active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;height:100vh;min-height:650px;display:flex;align-items:center;overflow:hidden;margin-top:calc(var(--header-h) + 34px)}
.hero-bg{position:absolute;inset:0}
.hero-bg-img{width:100%;height:100%;object-fit:cover}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(135deg,rgba(0,31,109,0.6) 0%,rgba(0,20,80,0.4) 50%,rgba(0,0,0,0.3) 100%)}
.hero-content{position:relative;z-index:1;padding:0 24px;max-width:var(--max-w);margin:0 auto;width:100%}
.hero-badge{display:inline-block;background:var(--red);color:#fff;padding:6px 20px;border-radius:4px;font-size:.8rem;font-weight:700;margin-bottom:20px;letter-spacing:.05em}
.hero-title{font-family:var(--font-serif);font-size:clamp(2rem,5vw,3.5rem);color:#fff;font-weight:700;line-height:1.5;margin-bottom:16px}
.hero-title strong{color:var(--gold-light);font-size:1.15em}
.hero-subtitle{font-size:1rem;color:rgba(255,255,255,0.85);margin-bottom:36px;line-height:2;max-width:600px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap}

/* ===== Section Common ===== */
.section{padding:100px 0}
.section-header{text-align:center;margin-bottom:60px}
.section-label{font-size:.75rem;color:var(--red);font-weight:700;letter-spacing:.2em;text-transform:uppercase;display:block;margin-bottom:8px}
.section-title{font-family:var(--font-serif);font-size:clamp(1.5rem,3vw,2.2rem);font-weight:700;color:var(--navy);margin-bottom:16px;line-height:1.6}
.section-title-white{color:#fff}
.section-desc{color:var(--text-light);font-size:.95rem;max-width:700px;margin:0 auto;line-height:2}
.section-line{width:60px;height:3px;background:var(--red);margin:16px auto 0}

/* ===== Concept / Message ===== */
.message-section{background:var(--navy);color:#fff;padding:80px 0;position:relative;overflow:hidden}
.message-section::before{content:'';position:absolute;right:-100px;top:-100px;width:400px;height:400px;border-radius:50%;background:rgba(255,255,255,0.03)}
.message-content{text-align:center;position:relative}
.message-text{font-family:var(--font-serif);font-size:clamp(1.2rem,2.5vw,1.8rem);font-weight:700;line-height:2;margin-bottom:20px}
.message-sub{font-size:.9rem;opacity:.8;line-height:2;max-width:700px;margin:0 auto}

/* ===== Reason Banner ===== */
.reason-banner{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-dark) 100%);padding:80px 0;color:#fff}
.reason-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.reason-text h2{font-family:var(--font-serif);font-size:1.6rem;line-height:1.8;margin-bottom:20px}
.reason-text h2 span{color:var(--gold-light)}
.reason-text p{opacity:.85;font-size:.9rem;line-height:2}
.reason-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-lg)}
.reason-img img{width:100%;height:350px;object-fit:cover}

/* ===== Features Grid ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.feature-card{background:#fff;border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);transition:transform .3s,box-shadow .3s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.feature-card-img{height:200px;overflow:hidden}
.feature-card-img img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.feature-card:hover .feature-card-img img{transform:scale(1.05)}
.feature-card-body{padding:28px}
.feature-card-num{font-family:var(--font-serif);font-size:2rem;font-weight:700;color:var(--navy);opacity:.2;line-height:1;margin-bottom:8px}
.feature-card-body h3{font-size:1.05rem;font-weight:700;color:var(--navy);margin-bottom:10px}
.feature-card-body p{font-size:.85rem;color:var(--text-light);line-height:1.8}
.feature-card-link{display:inline-flex;align-items:center;gap:6px;color:var(--red);font-size:.85rem;font-weight:700;margin-top:12px;transition:gap .3s}
.feature-card-link:hover{gap:10px}

/* ===== Works / Gallery ===== */
.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.work-card{border-radius:var(--radius);overflow:hidden;position:relative;aspect-ratio:4/3;cursor:pointer}
.work-card img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.work-card:hover img{transform:scale(1.08)}
.work-card-overlay{position:absolute;inset:0;background:linear-gradient(to top,rgba(0,0,0,0.6) 0%,transparent 60%);display:flex;align-items:flex-end;padding:20px;transition:background .3s}
.work-card:hover .work-card-overlay{background:linear-gradient(to top,rgba(0,31,109,0.7) 0%,rgba(0,31,109,0.2) 60%)}
.work-card-info h3{color:#fff;font-size:.95rem;margin-bottom:4px}
.work-card-info p{color:rgba(255,255,255,0.8);font-size:.75rem}

/* ===== CTA Banner ===== */
.cta-banner{background:var(--red);padding:60px 0;color:#fff;text-align:center}
.cta-banner h2{font-family:var(--font-serif);font-size:1.6rem;margin-bottom:12px}
.cta-banner p{opacity:.9;margin-bottom:28px;font-size:.9rem}
.cta-buttons{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}

/* ===== Company Info ===== */
.company-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
.company-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.company-img img{width:100%;height:380px;object-fit:cover}
.company-table{width:100%;border-collapse:collapse}
.company-table tr{border-bottom:1px solid var(--border)}
.company-table tr:last-child{border-bottom:none}
.company-table th,.company-table td{padding:16px 12px;text-align:left;font-size:.9rem}
.company-table th{width:140px;font-weight:600;color:var(--navy);vertical-align:top}
.company-table td{color:var(--text-light);line-height:1.8}
.company-table td strong{color:var(--text);font-weight:500}

/* ===== Timeline ===== */
.timeline{max-width:750px;margin:0 auto;position:relative;padding-left:80px}
.timeline::before{content:'';position:absolute;left:40px;top:0;bottom:0;width:2px;background:var(--border)}
.timeline-item{position:relative;margin-bottom:36px}
.timeline-item::before{content:'';position:absolute;left:-46px;top:6px;width:12px;height:12px;border-radius:50%;background:var(--red);border:3px solid #fff;box-shadow:0 0 0 2px var(--red)}
.timeline-year{font-family:var(--font-serif);font-size:1.6rem;font-weight:700;color:var(--navy);line-height:1;margin-bottom:6px}
.timeline-content h4{font-size:.8rem;color:var(--text-lighter);font-weight:400;margin-bottom:4px}
.timeline-content p{font-size:.9rem;color:var(--text)}

/* ===== Contact Section ===== */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:start}
.contact-card{background:var(--navy);color:#fff;border-radius:var(--radius);padding:40px;text-align:center}
.contact-card-label{font-size:.8rem;opacity:.7;margin-bottom:8px}
.contact-phone{font-family:var(--font-serif);font-size:2.2rem;font-weight:700;letter-spacing:.03em;margin-bottom:4px}
.contact-phone-sub{font-size:1.1rem;opacity:.8;margin-bottom:12px}
.contact-divider{width:40px;height:1px;background:rgba(255,255,255,0.2);margin:16px auto}
.contact-note{font-size:.75rem;opacity:.5}
.contact-details{display:flex;flex-direction:column;gap:20px}
.contact-item{display:flex;gap:14px;align-items:flex-start}
.contact-item svg{color:var(--red);flex-shrink:0;margin-top:3px}
.contact-item p{font-size:.9rem;color:var(--text-light);line-height:1.7}
.contact-item strong{color:var(--navy);font-weight:600;display:block;margin-bottom:2px}
.contact-map{border-radius:var(--radius);overflow:hidden;border:1px solid var(--border);margin-top:20px}
.contact-map iframe{display:block}

/* ===== Footer ===== */
.footer{background:#0A0F1E;color:rgba(255,255,255,0.6);padding:60px 0 0}
.footer-inner{display:grid;grid-template-columns:1.2fr 1fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,0.08)}
.footer-logo{font-family:var(--font-serif);font-size:1.3rem;color:#fff;margin-bottom:8px}
.footer-company-name{font-size:.8rem;color:var(--gold-light);margin-bottom:12px}
.footer-address{font-size:.75rem;line-height:1.8;opacity:.6}
.footer-col h4{font-size:.75rem;color:var(--gold-light);font-weight:600;margin-bottom:16px;letter-spacing:.05em}
.footer-col a{display:block;font-size:.8rem;margin-bottom:10px;transition:color .3s}
.footer-col a:hover{color:#fff}
.footer-bottom{text-align:center;padding:20px 0;font-size:.7rem;opacity:.4}

/* ===== Page Header (子ページ用) ===== */
.page-header{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-dark) 100%);padding:140px 0 60px;color:#fff;text-align:center;margin-top:calc(var(--header-h) + 34px)}
.page-header .section-label{color:var(--gold-light)}
.page-header h1{font-family:var(--font-serif);font-size:2rem;font-weight:700}
.page-breadcrumb{font-size:.75rem;opacity:.6;margin-top:12px}
.page-breadcrumb a{opacity:1;transition:opacity .3s}
.page-breadcrumb a:hover{opacity:.8}

/* ===== Page Content ===== */
.page-content{padding:80px 0}
.page-content h2{font-family:var(--font-serif);font-size:1.5rem;color:var(--navy);margin-bottom:20px;padding-bottom:12px;border-bottom:2px solid var(--red);display:inline-block}
.page-content h3{font-size:1.1rem;color:var(--navy);margin:28px 0 12px;font-weight:700}
.page-content p{color:var(--text-light);margin-bottom:16px;font-size:.95rem;line-height:2}
.page-content-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start;margin-bottom:48px}
.page-content-img{border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.page-content-img img{width:100%;height:300px;object-fit:cover}

/* ===== Form ===== */
.form-group{margin-bottom:20px}
.form-label{display:block;font-size:.85rem;font-weight:600;color:var(--navy);margin-bottom:6px}
.form-label .required{color:var(--red);font-size:.75rem;margin-left:4px}
.form-input,.form-textarea{width:100%;padding:12px 16px;border:1px solid var(--border);border-radius:6px;font-size:.9rem;font-family:var(--font);transition:border-color .3s}
.form-input:focus,.form-textarea:focus{outline:none;border-color:var(--navy)}
.form-textarea{min-height:160px;resize:vertical}

/* ===== Responsive ===== */
@media(max-width:1024px){
  .header-cta{display:none}
  .nav{gap:16px}
  .features-grid{grid-template-columns:1fr 1fr}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .nav{position:fixed;top:calc(var(--header-h) + 34px);left:0;right:0;background:rgba(255,255,255,0.98);backdrop-filter:blur(12px);flex-direction:column;padding:24px;gap:20px;transform:translateY(-120%);opacity:0;pointer-events:none;transition:transform .3s,opacity .3s;border-bottom:1px solid var(--border)}
  .nav.open{transform:translateY(0);opacity:1;pointer-events:auto}
  .hamburger{display:flex}
  .reason-grid,.company-grid,.contact-grid,.page-content-grid{grid-template-columns:1fr}
  .features-grid,.works-grid{grid-template-columns:1fr}
  .section{padding:60px 0}
  .hero{min-height:500px}
  .footer-inner{grid-template-columns:1fr}
  .header-top{display:none}
  .hero{margin-top:var(--header-h)}
  .nav{top:var(--header-h)}
  .page-header{margin-top:var(--header-h)}
}
@media(max-width:480px){
  .company-table th,.company-table td{display:block;padding:8px 12px}
  .company-table th{width:100%;padding-bottom:0}
  .company-table tr{display:block;padding:12px 0}
}

/* ===== Animations ===== */
.fade-in{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}