:root{
  --navy:#0d1b2e;
  --navy-2:#122440;
  --ink:#1d2b3f;
  --cyan:#19b8d4;
  --cyan-deep:#0e8aa3;
  --amber:#f5a524;
  --paper:#f7fafc;
  --white:#ffffff;
  --line:#dbe4ee;
  --muted:#5a6b80;
  --radius:18px;
  --shadow:0 10px 40px rgba(13,27,46,.10);
  --font-jp:"Noto Sans JP",-apple-system,BlinkMacSystemFont,"Hiragino Kaku Gothic ProN",sans-serif;
  --font-en:"Outfit","Noto Sans JP",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:84px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}
}
body{font-family:var(--font-jp);color:var(--ink);background:var(--paper);line-height:1.8;-webkit-font-smoothing:antialiased;overflow-x:hidden}
img{max-width:100%;display:block}
a{color:var(--cyan-deep)}
:focus-visible{outline:3px solid var(--amber);outline-offset:3px;border-radius:4px}

/* ---- skip link ---- */
.skip-link{position:absolute;left:-9999px;top:0;background:var(--amber);color:var(--navy);font-weight:700;padding:.8em 1.4em;z-index:200;border-radius:0 0 10px 0}
.skip-link:focus{left:0}

/* ---- header ---- */
.header{position:fixed;inset:0 0 auto 0;z-index:100;background:rgba(13,27,46,.86);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px)}
.header__inner{max-width:1120px;margin:0 auto;padding:0 24px;height:68px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.brand{display:flex;align-items:baseline;gap:10px;text-decoration:none}
.brand__logo{font-family:var(--font-en);font-weight:800;font-size:1.5rem;color:var(--white);letter-spacing:.02em}
.brand__logo::after{content:"";display:inline-block;width:.42em;height:.42em;margin-left:.14em;border-radius:50%;background:var(--cyan)}
.brand__tag{font-family:var(--font-en);font-size:.68rem;color:#9db4cc;letter-spacing:.16em;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:4px}
.nav a{color:#dbe7f5;text-decoration:none;font-size:.88rem;font-weight:500;padding:.55em .9em;border-radius:8px;transition:background .2s,color .2s}
.nav a:hover{background:rgba(25,184,212,.16);color:var(--white)}
.nav a.nav__cta{background:var(--cyan);color:var(--navy);font-weight:700;margin-left:8px}
.nav a.nav__cta:hover{background:#3fd0e9}
@media (max-width:760px){
  .brand__tag{display:none}
  .nav a{padding:.5em .55em;font-size:.8rem}
  .nav a.nav__cta{margin-left:2px}
}
@media (max-width:480px){
  .header__inner{padding:0 12px}
  .brand__logo{font-size:1.2rem}
  .nav{gap:0}
  .nav a{padding:.45em .4em;font-size:.72rem}
}

/* ---- hero ---- */
.hero{position:relative;overflow:hidden;background:linear-gradient(155deg,var(--navy) 0%,var(--navy-2) 55%,#0e3a52 100%);color:var(--white);padding:172px 24px 110px}
.hero::before{content:"";position:absolute;width:640px;height:640px;border-radius:50%;right:-180px;top:-220px;background:radial-gradient(circle,rgba(25,184,212,.28) 0%,transparent 65%)}
.hero::after{content:"";position:absolute;width:420px;height:420px;border-radius:50%;left:-140px;bottom:-200px;background:radial-gradient(circle,rgba(245,165,36,.16) 0%,transparent 65%)}
.hero__grid{position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse at 30% 20%,#000 30%,transparent 75%);-webkit-mask-image:radial-gradient(ellipse at 30% 20%,#000 30%,transparent 75%)}
.hero__inner{position:relative;max-width:1120px;margin:0 auto;z-index:1}
.hero__en{font-family:var(--font-en);font-weight:600;letter-spacing:.3em;text-transform:uppercase;color:var(--cyan);font-size:.85rem;margin-bottom:20px}
.hero h1{font-size:clamp(1.9rem,4.6vw,3.3rem);font-weight:900;line-height:1.45;letter-spacing:.02em;margin-bottom:26px}
.hero h1 em{font-style:normal;background:linear-gradient(transparent 62%,rgba(25,184,212,.45) 62%)}
.hero__lead{max-width:36em;color:#c3d3e6;font-size:clamp(.95rem,1.6vw,1.08rem);margin-bottom:42px}
.hero__actions{display:flex;flex-wrap:wrap;gap:14px}
.btn{display:inline-flex;align-items:center;gap:.5em;text-decoration:none;font-weight:700;font-size:.98rem;padding:.95em 2.1em;border-radius:999px;transition:transform .2s,box-shadow .2s,background .2s;border:none;cursor:pointer;font-family:inherit}
.btn:hover{transform:translateY(-2px)}
.btn--primary{background:var(--cyan);color:var(--navy);box-shadow:0 8px 24px rgba(25,184,212,.35)}
.btn--primary:hover{background:#3fd0e9}
.btn--ghost{border:2px solid rgba(255,255,255,.4);color:var(--white)}
.btn--ghost:hover{border-color:var(--cyan);background:rgba(25,184,212,.12)}
.btn .arrow{transition:transform .2s}
.btn:hover .arrow{transform:translateX(4px)}

/* ---- page hero（下層ページ用） ---- */
.page-hero{position:relative;overflow:hidden;background:linear-gradient(155deg,var(--navy) 0%,var(--navy-2) 55%,#0e3a52 100%);color:var(--white);padding:150px 24px 70px}
.page-hero .hero__inner{text-align:center}
.page-hero h1{font-size:clamp(1.6rem,3.4vw,2.4rem);font-weight:900;letter-spacing:.03em}
.page-hero .hero__en{margin-bottom:14px;justify-content:center;display:flex}

/* ---- stats ---- */
.stats{position:relative;z-index:2;max-width:1120px;margin:-52px auto 0;padding:0 24px}
.stats__card{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);display:grid;grid-template-columns:repeat(3,1fr);overflow:hidden}
.stat{padding:28px 20px;text-align:center;position:relative}
.stat + .stat::before{content:"";position:absolute;left:0;top:22%;height:56%;width:1px;background:var(--line)}
.stat__num{font-family:var(--font-en);font-weight:800;font-size:clamp(1.5rem,3vw,2.2rem);color:var(--navy);line-height:1.2}
.stat__num small{font-size:.55em;font-weight:600;color:var(--cyan-deep);margin-left:.15em}
.stat__label{font-size:.8rem;color:var(--muted);margin-top:4px}
@media (max-width:600px){.stat{padding:20px 8px}.stat__label{font-size:.7rem}}

/* ---- sections ---- */
.section{padding:96px 24px}
.section--alt{background:var(--white)}
.section__inner{max-width:1120px;margin:0 auto}
.sec-head{margin-bottom:52px}
.sec-head__en{font-family:var(--font-en);font-weight:600;font-size:.82rem;letter-spacing:.28em;text-transform:uppercase;color:var(--cyan-deep);display:flex;align-items:center;gap:14px}
.sec-head__en::before{content:"";width:34px;height:2px;background:var(--cyan)}
.sec-head h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:900;color:var(--navy);margin-top:10px;letter-spacing:.02em}
.sec-head p{color:var(--muted);margin-top:12px;max-width:42em}

/* ---- services ---- */
.svc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:20px}
.svc{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:transform .25s,box-shadow .25s,border-color .25s;position:relative;overflow:hidden}
.section--alt .svc{background:var(--paper)}
.svc:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:rgba(25,184,212,.5)}
.svc__icon{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,rgba(25,184,212,.14),rgba(25,184,212,.05));display:grid;place-items:center;margin-bottom:18px;color:var(--cyan-deep)}
.svc__icon svg{width:26px;height:26px}
.svc h3{font-size:1.02rem;font-weight:700;color:var(--navy);margin-bottom:8px;letter-spacing:.02em}
.svc p{font-size:.86rem;color:var(--muted);line-height:1.7}
.svc__cat{position:absolute;top:18px;right:18px;font-family:var(--font-en);font-size:.6rem;letter-spacing:.14em;text-transform:uppercase;color:#a8b8ca;font-weight:600}

/* ---- strength ---- */
.str-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px}
.str{background:var(--navy);color:var(--white);border-radius:var(--radius);padding:38px 32px;position:relative;overflow:hidden}
.str::after{content:"";position:absolute;width:220px;height:220px;border-radius:50%;right:-80px;bottom:-100px;background:radial-gradient(circle,rgba(25,184,212,.25),transparent 70%)}
.str__num{font-family:var(--font-en);font-weight:800;font-size:2.6rem;color:var(--cyan);line-height:1;margin-bottom:16px}
.str h3{font-size:1.15rem;font-weight:700;margin-bottom:12px;letter-spacing:.03em}
.str p{font-size:.88rem;color:#c3d3e6;position:relative;z-index:1}

/* ---- company ---- */
.company{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media (max-width:820px){.company{grid-template-columns:1fr}}
.company__table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.company__table th,.company__table td{text-align:left;padding:20px 24px;border-bottom:1px solid var(--line);font-size:.92rem;vertical-align:top}
.company__table tr:last-child th,.company__table tr:last-child td{border-bottom:none}
.company__table th{width:9em;color:var(--cyan-deep);font-weight:700;background:rgba(25,184,212,.05)}
.company__note{background:var(--white);border-radius:var(--radius);padding:34px 32px;box-shadow:var(--shadow)}
.company__note h3{font-size:1.1rem;font-weight:900;color:var(--navy);margin-bottom:14px;display:flex;align-items:center;gap:10px}
.company__note h3::before{content:"";width:10px;height:10px;border-radius:50%;background:var(--amber)}
.company__note p{font-size:.92rem;color:var(--muted);margin-bottom:1em}
.company__note p:last-child{margin-bottom:0}

/* ---- contact CTA ---- */
.contact{background:linear-gradient(140deg,var(--navy) 0%,#0e3a52 100%);color:var(--white);text-align:center;border-radius:calc(var(--radius) + 8px);padding:72px 32px;position:relative;overflow:hidden}
.contact::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse at 50% 0%,#000 20%,transparent 70%);-webkit-mask-image:radial-gradient(ellipse at 50% 0%,#000 20%,transparent 70%)}
.contact > *{position:relative}
.contact__en{font-family:var(--font-en);font-weight:600;letter-spacing:.3em;text-transform:uppercase;color:var(--cyan);font-size:.8rem;margin-bottom:16px}
.contact h2{font-size:clamp(1.4rem,3vw,2rem);font-weight:900;margin-bottom:18px}
.contact p{color:#c3d3e6;max-width:34em;margin:0 auto 36px;font-size:.95rem}

/* ---- contact form ---- */
.form-wrap{max-width:680px;margin:0 auto}
.form{background:var(--white);border-radius:var(--radius);box-shadow:var(--shadow);padding:44px 40px}
@media (max-width:600px){.form{padding:32px 22px}}
.form__row{margin-bottom:26px}
.form label{display:block;font-weight:700;font-size:.92rem;color:var(--navy);margin-bottom:8px}
.form .req{display:inline-block;background:var(--amber);color:var(--navy);font-size:.68rem;font-weight:700;border-radius:6px;padding:.1em .6em;margin-left:.6em;vertical-align:middle}
.form .opt{display:inline-block;background:var(--line);color:var(--muted);font-size:.68rem;font-weight:700;border-radius:6px;padding:.1em .6em;margin-left:.6em;vertical-align:middle}
.form input,.form textarea{width:100%;border:1.5px solid var(--line);border-radius:10px;padding:.85em 1em;font:inherit;font-size:.95rem;background:var(--paper);color:var(--ink);transition:border-color .2s,box-shadow .2s,background .2s}
.form input:focus,.form textarea:focus{outline:none;border-color:var(--cyan);background:var(--white);box-shadow:0 0 0 3px rgba(25,184,212,.18)}
.form textarea{min-height:180px;resize:vertical}
.form__hint{font-size:.8rem;color:var(--muted);margin-top:6px}
.form__actions{text-align:center;margin-top:34px}
.form__note{font-size:.82rem;color:var(--muted);text-align:center;margin-top:18px}

/* ---- footer ---- */
.footer{background:var(--navy);color:#9db4cc;padding:56px 24px 32px;margin-top:96px}
.footer__inner{max-width:1120px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:28px;align-items:flex-start}
.footer .brand__logo{font-size:1.3rem}
.footer__addr{font-style:normal;font-size:.82rem;line-height:1.9;margin-top:10px}
.footer__nav{display:flex;gap:20px;flex-wrap:wrap}
.footer__nav a{color:#c3d3e6;text-decoration:none;font-size:.85rem}
.footer__nav a:hover{color:var(--cyan)}
.footer__copy{max-width:1120px;margin:36px auto 0;padding-top:22px;border-top:1px solid rgba(255,255,255,.12);font-size:.75rem;text-align:center;color:#748aa3}

/* ---- back to top（右下固定・追従） ---- */
.to-top{position:fixed;right:20px;bottom:20px;z-index:90;width:50px;height:50px;border-radius:50%;background:var(--navy);color:var(--white);display:grid;place-items:center;text-decoration:none;border:2px solid rgba(25,184,212,.55);box-shadow:0 6px 20px rgba(13,27,46,.35);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .3s,transform .3s,visibility .3s,background .2s,color .2s}
.to-top.is-show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--cyan);color:var(--navy)}
.to-top svg{width:22px;height:22px}
@media (max-width:480px){.to-top{right:14px;bottom:14px;width:44px;height:44px}}

/* ---- reveal animation ---- */
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s ease,transform .7s ease}
.reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion: reduce){.reveal{opacity:1;transform:none}}

.svc__link{display:inline-block;margin-top:14px;font-size:.85rem;font-weight:700;color:var(--cyan-deep);text-decoration:none;border-bottom:1px solid currentColor}.svc__link::after{content:" \2192"}.svc__link:hover{opacity:.7}