:root{
  --blue:#0d4f98;
  --deep:#08305f;
  --orange:#f26a21;
  --soft:#f4f8fc;
  --line:#d9e7f2;
  --text:#1f2c3a;
  --muted:#667789;
  --shadow:0 16px 38px rgba(8,48,95,.12);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;color:var(--text);line-height:1.75;background:#fff}
a{text-decoration:none;color:inherit}.container{width:min(1120px,92%);margin:auto}
.site-header{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.header-inner{height:86px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px}.brand-logo{width:70px;height:54px;object-fit:contain}.brand-name{display:flex;flex-direction:column;line-height:1.2}.brand-name strong{font-family:Georgia,"Times New Roman",serif;font-size:1.9rem;color:var(--deep);letter-spacing:.01em}.brand-name span{font-weight:700;font-size:.78rem;color:#33485d}.nav{display:flex;gap:26px;align-items:center;font-weight:800}.nav a{color:#2c3d50}.nav a:hover{color:var(--blue)}.nav-cta{background:var(--orange);color:#fff!important;border-radius:999px;padding:10px 18px}.nav-toggle{display:none;border:0;background:var(--blue);color:#fff;border-radius:10px;width:44px;height:44px;font-size:1.35rem;position:relative;align-items:center;justify-content:center;cursor:pointer}
.hamburger,.hamburger::before,.hamburger::after{display:block;width:22px;height:2px;background:#fff;border-radius:999px;transition:.22s}
.hamburger::before,.hamburger::after{content:"";position:absolute;left:11px}
.hamburger::before{top:14px}.hamburger::after{bottom:14px}
.nav-toggle[aria-expanded="true"] .hamburger{background:transparent}
.nav-toggle[aria-expanded="true"] .hamburger::before{top:21px;transform:rotate(45deg)}
.nav-toggle[aria-expanded="true"] .hamburger::after{bottom:21px;transform:rotate(-45deg)}
.nav-backdrop{display:none}

.hero{position:relative;min-height:640px;display:flex;align-items:center;overflow:hidden;background:linear-gradient(90deg,rgba(8,48,95,.72) 0%,rgba(8,48,95,.48) 48%,rgba(8,48,95,.22) 100%),url('assets/hero-photo.jpg');background-size:cover;background-position:center right}.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(8,48,95,.10),rgba(8,48,95,.28));pointer-events:none}.hero-overlay{position:relative;z-index:1;padding:86px 0}.hero-copy{width:min(690px,100%);background:rgba(8,48,95,.50);backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.28);border-radius:24px;padding:42px 44px;box-shadow:0 20px 48px rgba(8,48,95,.22)}.hero h1{font-size:clamp(2rem,4vw,3.55rem);line-height:1.22;margin:0 0 18px;color:#fff;letter-spacing:.02em;text-shadow:0 3px 14px rgba(0,0,0,.28)}.hero .lead{font-size:clamp(1.08rem,2vw,1.45rem);font-weight:900;color:#fff;margin:0 0 18px;text-shadow:0 2px 10px rgba(0,0,0,.25)}.hero-text{font-size:1.08rem;font-weight:600;color:rgba(255,255,255,.92);margin:0 0 30px;text-shadow:0 2px 10px rgba(0,0,0,.22)}.hero-actions{display:flex;gap:14px;flex-wrap:wrap}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:9px;padding:15px 26px;font-weight:900;box-shadow:0 12px 26px rgba(0,0,0,.12);transition:.2s;text-align:center;line-height:1.45}.btn:hover{transform:translateY(-2px)}.btn-primary{background:var(--orange);color:white}.btn-secondary{background:var(--blue);color:white}.btn-outline{border:2px solid var(--blue);color:var(--blue);background:#fff;box-shadow:none}.btn small{display:block;font-size:.8rem;font-weight:800;opacity:.95}
.section{padding:78px 0}.section-title{text-align:center;margin-bottom:34px}.eyebrow{letter-spacing:.14em;color:var(--blue);font-weight:900;margin:0 0 6px}.section h2{font-size:clamp(1.8rem,3vw,2.7rem);line-height:1.35;color:var(--deep);margin:0 0 10px}.section-title p{color:var(--muted);margin:0}.service-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.service-card{background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;box-shadow:0 10px 24px rgba(8,48,95,.08)}.service-card img{width:100%;height:160px;object-fit:cover;display:block}.service-card-body{padding:18px 18px 22px}.service-card h3{font-size:1.25rem;line-height:1.35;color:var(--blue);margin:0 0 10px;text-align:center}.service-card p{font-size:.95rem;color:#33485d;margin:0;font-weight:600}.strength{background:linear-gradient(180deg,#f7fbff,#eef6ff)}.strength-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}.strength-item{background:#fff;border:1px solid var(--line);border-radius:18px;padding:24px;text-align:center;box-shadow:0 10px 24px rgba(8,48,95,.07)}.strength-icon{width:78px;height:78px;border-radius:50%;background:#edf6ff;color:var(--blue);display:flex;align-items:center;justify-content:center;margin:0 auto 14px;font-size:2rem;font-weight:900}.strength-item h3{font-size:1.1rem;line-height:1.45;color:var(--deep);margin:0 0 8px}.strength-item p{font-size:.9rem;color:#45576b;margin:0}.factarc{background:#fff}.factarc-box{display:grid;grid-template-columns:1fr 1.05fr;gap:32px;align-items:center;background:linear-gradient(90deg,#f7fbff,#fff);border:1px solid var(--line);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}.factarc-copy{padding:38px}.factarc h2{font-size:3rem}.factarc-sub{font-size:1.3rem;color:var(--blue);font-weight:900;margin:0 0 12px}.tags{display:flex;flex-wrap:wrap;gap:9px;margin:20px 0 26px}.tags span{background:#eaf3ff;color:var(--blue);border-radius:6px;padding:7px 12px;font-weight:800}.factarc-photo img{width:100%;height:360px;object-fit:cover;display:block}.contact-band{padding:40px 0;background:#fff}.contact-panel{display:flex;align-items:center;justify-content:space-between;gap:24px;background:#fff;border:1px solid var(--line);box-shadow:var(--shadow);border-radius:16px;padding:28px 34px}.contact-panel h2{font-size:2rem}.contact-panel p{margin:0;color:var(--orange);font-weight:900}.footer{background:var(--deep);color:white;padding:32px 0 18px}.footer-inner{display:flex;justify-content:space-between;gap:24px;align-items:center}.footer-brand{display:flex;align-items:center;gap:12px}.footer-logo{width:66px;height:48px;object-fit:contain;background:#fff;border-radius:8px}.footer-brand strong{font-family:Georgia,"Times New Roman",serif;font-size:2rem}.footer-brand span{display:block;font-size:.78rem;color:rgba(255,255,255,.78)}.footer-links{display:flex;gap:28px;flex-wrap:wrap;color:rgba(255,255,255,.9)}.copyright{text-align:center;color:rgba(255,255,255,.62);font-size:.86rem;margin:22px 0 0}
.form-section{background:linear-gradient(180deg,#f7fbff,#fff);padding:64px 0}.form-wrap{max-width:780px;margin:auto;background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow);padding:34px}.form-wrap label{display:block;font-weight:800;color:var(--deep);margin-bottom:16px}.form-wrap input,.form-wrap textarea,.form-wrap select{width:100%;margin-top:6px;border:1px solid #c9d9e8;border-radius:10px;padding:12px 14px;font:inherit}.form-wrap textarea{min-height:170px}.form-note{font-size:.9rem;color:var(--muted);text-align:center}.message-box{background:#edf8f0;border:1px solid #b9dfc3;color:#225b30;border-radius:12px;padding:16px;margin-bottom:18px}.error-box{background:#fff1ec;border:1px solid #ffc3b0;color:#843018;border-radius:12px;padding:16px;margin-bottom:18px}.page-hero{padding:56px 0;background:#f5faff;text-align:center}.page-hero h1{font-size:clamp(2rem,4vw,3.2rem);color:var(--deep);margin:0 0 8px}.page-hero p{color:#45576b;margin:0;font-weight:700}
@media(max-width:900px){.header-inner{height:74px}.brand-logo{width:56px;height:44px}.brand-name strong{font-size:1.45rem}.nav-toggle{display:block}.nav{display:none;position:absolute;top:74px;left:4%;right:4%;background:white;border:1px solid var(--line);border-radius:16px;box-shadow:var(--shadow);padding:18px;flex-direction:column}.nav.open{display:flex}.factarc-box{grid-template-columns:1fr}.hero{min-height:560px;background-position:center}.hero-overlay{padding:64px 0}.hero-copy{width:100%;padding:34px}.service-grid,.strength-grid{grid-template-columns:1fr 1fr}.contact-panel,.footer-inner{flex-direction:column;align-items:flex-start}.contact-panel .btn{width:100%}.footer-links{flex-direction:column;gap:8px}}
@media(max-width:560px){.service-grid,.strength-grid{grid-template-columns:1fr}.hero-actions .btn{width:100%}.hero h1{font-size:1.9rem}.factarc-copy{padding:26px}.factarc h2{font-size:2.25rem}.contact-panel{padding:24px}.footer-brand strong{font-size:1.5rem}}


/* ===== Smartphone layout ===== */
@media(max-width:900px){
  body.menu-open{overflow:hidden}
  .site-header{position:sticky}
  .header-inner{height:66px}
  .container{width:min(100% - 28px,1120px)}
  .brand{min-width:0;gap:9px}
  .brand-logo{width:46px;height:38px}
  .brand-name strong{font-size:1.22rem}
  .brand-name span{font-size:.66rem;white-space:nowrap}
  .nav-toggle{display:flex;flex:0 0 auto;z-index:50}
  .nav{
    display:flex;
    position:fixed;
    top:66px;
    left:14px;
    right:14px;
    max-height:calc(100vh - 84px);
    overflow:auto;
    background:#fff;
    border:1px solid var(--line);
    border-radius:18px;
    box-shadow:0 24px 70px rgba(8,48,95,.26);
    padding:12px;
    flex-direction:column;
    gap:0;
    z-index:45;
    opacity:0;
    visibility:hidden;
    transform:translateY(-10px);
    pointer-events:none;
    transition:.2s ease;
  }
  .nav.open{
    opacity:1;
    visibility:visible;
    transform:translateY(0);
    pointer-events:auto;
  }
  .nav::before{
    content:"MENU";
    display:block;
    width:100%;
    padding:6px 10px 10px;
    color:var(--blue);
    font-size:.78rem;
    font-weight:900;
    letter-spacing:.16em;
    border-bottom:1px solid var(--line);
    margin-bottom:4px;
  }
  .nav a{
    width:100%;
    padding:14px 12px;
    border-bottom:1px solid #edf3f8;
    color:var(--deep);
    font-size:1rem;
  }
  .nav a:last-child{border-bottom:0}
  .nav-cta{
    margin-top:8px;
    text-align:center;
    padding:13px 16px!important;
    border-radius:12px!important;
  }
  .nav-backdrop{
    position:fixed;
    inset:66px 0 0;
    z-index:40;
    background:rgba(8,48,95,.26);
    opacity:0;
    pointer-events:none;
    transition:.2s;
  }
  body.menu-open .nav-backdrop{display:block;opacity:1;pointer-events:auto}

  .hero{
    min-height:600px;
    align-items:flex-end;
    background-position:center center;
  }
  .hero::after{
    background:linear-gradient(180deg,rgba(8,48,95,.12) 0%,rgba(8,48,95,.72) 72%,rgba(8,48,95,.86) 100%);
  }
  .hero-overlay{padding:150px 0 34px}
  .hero-copy{
    width:100%;
    padding:24px 20px;
    border-radius:18px;
    background:rgba(8,48,95,.48);
    backdrop-filter:blur(5px);
  }
  .hero h1{
    font-size:clamp(1.62rem,7.4vw,2.25rem);
    line-height:1.34;
    margin-bottom:12px;
  }
  .hero .lead{font-size:1rem;margin-bottom:10px}
  .hero-text{font-size:.95rem;margin-bottom:20px}
  .hero-actions{gap:10px}
  .hero-actions .btn{width:100%;padding:13px 16px;border-radius:12px}

  .section{padding:54px 0}
  .section-title{margin-bottom:22px}
  .section h2{font-size:1.75rem}
  .service-grid,.strength-grid{grid-template-columns:1fr;gap:16px}
  .service-card{border-radius:18px}
  .service-card img{height:185px}
  .service-card h3{text-align:left;font-size:1.18rem}
  .service-card-body{padding:18px}

  .strength-item{display:flex;gap:14px;text-align:left;align-items:flex-start;padding:18px}
  .strength-icon{width:56px;height:56px;min-width:56px;font-size:1.35rem;margin:0}
  .strength-item h3{font-size:1.02rem}

  .factarc-box{grid-template-columns:1fr;border-radius:18px}
  .factarc-copy{padding:24px 20px;order:2}
  .factarc-photo{order:1}
  .factarc-photo img{height:220px}
  .factarc h2{font-size:2.35rem}
  .tags{gap:8px}
  .tags span{font-size:.88rem;padding:6px 10px}
  .factarc .btn{width:100%;border-radius:12px}

  .contact-band{padding:24px 0 46px}
  .contact-panel{
    flex-direction:column;
    align-items:stretch;
    text-align:center;
    gap:18px;
    padding:24px 20px;
  }
  .contact-panel h2{font-size:1.5rem;margin:0 0 6px}
  .contact-panel .btn{width:100%;border-radius:12px}

  .footer-inner{flex-direction:column;align-items:center;text-align:center}
  .footer-brand{justify-content:center}
  .footer-logo{width:56px;height:42px}
  .footer-brand strong{font-size:1.55rem}
  .footer-links{justify-content:center;gap:10px;flex-direction:column}
}

@media(max-width:420px){
  .brand-name span{display:none}
  .brand-logo{width:42px;height:34px}
  .brand-name strong{font-size:1.18rem}
  .hero{min-height:580px}
  .hero-overlay{padding-top:130px}
  .hero-copy{padding:22px 18px}
  .hero h1{font-size:1.55rem}
}

#service,#strength,#factarc,#contact{scroll-margin-top:96px}
@media (max-width:900px){#service,#strength,#factarc,#contact{scroll-margin-top:82px}}


/* ===== FactArc brand style: business card matching ===== */
.factarc-brand{
  margin:0 0 22px;
}
.factarc-logo-text{
  font-size:clamp(3rem,6vw,4.4rem);
  font-weight:900;
  line-height:1;
  letter-spacing:-.04em;
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Noto Sans JP",sans-serif;
}
.factarc-logo-text .fact,
.btn-factarc-name .fact{
  color:#0B4EA2;
}
.factarc-logo-text .arc,
.btn-factarc-name .arc{
  color:#F58220;
}
.factarc-label{
  display:inline-block;
  margin-top:12px;
  padding:10px 22px;
  background:#F58220;
  color:#fff;
  font-weight:900;
  border-radius:4px;
  line-height:1.3;
  box-shadow:0 8px 18px rgba(242,106,33,.22);
}
.btn-factarc{
  flex-direction:column;
  gap:2px;
}
.btn-factarc .btn-sub{
  display:block;
  font-size:.86rem;
  font-weight:900;
  line-height:1.25;
}
.btn-factarc-name{
  display:block;
  font-size:1.18rem;
  font-weight:900;
  line-height:1.25;
}
.btn-secondary.btn-factarc{
  background:#fff;
  color:var(--deep);
  border:2px solid var(--blue);
}
.btn-secondary.btn-factarc:hover{
  background:#f7fbff;
}
@media(max-width:900px){
  .factarc-logo-text{font-size:3.1rem}
  .factarc-label{font-size:.95rem;padding:9px 16px}
}