/* ===== Base ===== */
:root{
  --navy:#0b1f3a;
  --navy-2:#13294f;
  --blue:#2f6df0;
  --blue-soft:#eaf1ff;
  --gold:#c8a24a;
  --ink:#1a2230;
  --muted:#5d6678;
  --line:#e6e9ef;
  --bg:#ffffff;
  --bg-soft:#f6f8fc;
  --radius:14px;
  --shadow:0 18px 50px rgba(11,31,58,.10);
  --container:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Noto Sans JP",system-ui,sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.8;
  -webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(var(--container),92%);margin-inline:auto}
.en,.section__en{font-family:"Montserrat",sans-serif;letter-spacing:.12em}

/* ===== Header ===== */
.header{
  position:fixed;top:0;left:0;width:100%;z-index:100;
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(10px);
  box-shadow:0 4px 20px rgba(11,31,58,.07);
  transition:box-shadow .3s, padding .3s;
  padding:12px 0;
}
.header.is-scrolled{
  box-shadow:0 6px 24px rgba(11,31,58,.10);
  padding:8px 0;
}
.header__inner{display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:12px;font-weight:700}
.logo__img{height:46px;width:auto;transition:height .3s}
.header.is-scrolled .logo__img{height:38px}
.logo__mark{
  display:grid;place-items:center;
  width:42px;height:42px;border-radius:11px;
  background:linear-gradient(135deg,var(--blue),var(--navy));
  color:#fff;font-family:"Montserrat";font-weight:800;font-size:18px;
  letter-spacing:.04em;box-shadow:0 6px 16px rgba(47,109,240,.35);
}
.nav__list{display:flex;align-items:center;gap:30px;list-style:none}
.nav__list a{
  font-size:15px;font-weight:500;color:var(--ink);transition:color .25s;
  position:relative;
}
.nav__list a:not(.nav__cta)::after{
  content:"";position:absolute;left:0;bottom:-6px;width:0;height:2px;
  background:var(--blue);transition:width .25s;
}
.nav__list a:not(.nav__cta):hover::after{width:100%}
.nav__cta{
  background:var(--blue);color:#fff!important;
  padding:10px 22px;border-radius:999px;font-weight:700;
  box-shadow:0 8px 20px rgba(47,109,240,.35);
}
.nav__cta:hover{background:var(--navy)}
.hamburger{
  display:none;flex-direction:column;gap:5px;background:none;border:0;
  cursor:pointer;padding:8px;z-index:110;
}
.hamburger span{width:26px;height:2px;background:var(--ink);transition:.3s;border-radius:2px}

/* ===== Hero ===== */
.hero{
  position:relative;min-height:100vh;display:flex;align-items:center;
  color:#fff;overflow:hidden;
}
.hero__bg{
  position:absolute;inset:0;
  background:#0a1830 url("../assets/hero-bg.png") center/cover no-repeat;
}
.hero__bg::after{
  content:"";position:absolute;inset:0;
  background:linear-gradient(90deg,rgba(8,18,40,.92) 0%,rgba(8,18,40,.65) 38%,rgba(8,18,40,.25) 70%,rgba(8,18,40,.15) 100%);
}
.hero__inner{position:relative;padding:120px 0 80px}
.hero__eyebrow{
  font-family:"Montserrat";letter-spacing:.28em;font-size:13px;
  color:var(--gold);font-weight:700;margin-bottom:22px;
}
.hero__title{
  font-size:clamp(38px,7vw,72px);font-weight:900;line-height:1.18;
  letter-spacing:.02em;margin-bottom:28px;
  text-shadow:0 8px 40px rgba(0,0,0,.25);
}
.hero__lead{
  font-size:clamp(15px,2.2vw,18px);font-weight:400;color:rgba(255,255,255,.88);
  margin-bottom:40px;
}
.hero__actions{display:flex;gap:16px;flex-wrap:wrap}
.hero__scroll{
  position:absolute;bottom:28px;left:50%;transform:translateX(-50%);
  font-family:"Montserrat";font-size:11px;letter-spacing:.2em;
  color:rgba(255,255,255,.7);display:flex;flex-direction:column;align-items:center;gap:8px;
}
.hero__scroll span{width:1px;height:42px;background:rgba(255,255,255,.5);animation:scrollLine 2s infinite}
@keyframes scrollLine{0%{transform:scaleY(0);transform-origin:top}50%{transform:scaleY(1);transform-origin:top}51%{transform-origin:bottom}100%{transform:scaleY(0);transform-origin:bottom}}

/* ===== Buttons ===== */
.btn{
  display:inline-flex;align-items:center;justify-content:center;
  padding:15px 34px;border-radius:999px;font-weight:700;font-size:15px;
  transition:transform .2s, box-shadow .2s, background .2s, color .2s;cursor:pointer;border:0;
}
.btn--primary{background:var(--blue);color:#fff;box-shadow:0 12px 28px rgba(47,109,240,.4)}
.btn--primary:hover{transform:translateY(-3px);box-shadow:0 18px 36px rgba(47,109,240,.5)}
.btn--ghost{background:transparent;color:#fff;border:1.5px solid rgba(255,255,255,.55)}
.btn--ghost:hover{background:rgba(255,255,255,.12);transform:translateY(-3px)}
.btn--full{width:100%}

/* ===== Sections ===== */
.section{padding:110px 0}
.section__head{text-align:center;margin-bottom:60px}
.section__en{
  display:block;font-size:14px;color:var(--blue);font-weight:700;margin-bottom:10px;
}
.section__title{font-size:clamp(28px,4.5vw,40px);font-weight:900;letter-spacing:.04em;color:var(--navy)}
.section__head--light .section__en{color:var(--gold)}
.section__head--light .section__title{color:#fff}

/* ===== About ===== */
.about{background:var(--bg)}
.about__grid{display:grid;grid-template-columns:1.1fr .9fr;gap:60px;align-items:start}
.about__lead h3{font-size:clamp(22px,3vw,30px);font-weight:900;color:var(--navy);line-height:1.5;margin-bottom:24px}
.about__lead p{color:var(--muted);margin-bottom:18px}
.about__points{list-style:none;display:grid;gap:18px}
.about__points li{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 26px;position:relative;transition:transform .25s, box-shadow .25s;
}
.about__points li:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.about__num{
  font-family:"Montserrat";font-weight:800;font-size:14px;color:var(--blue);
  letter-spacing:.1em;
}
.about__points h4{font-size:18px;font-weight:700;color:var(--navy);margin:6px 0 6px}
.about__points p{color:var(--muted);font-size:14.5px}

/* ===== Services ===== */
.services{background:var(--bg-soft)}
.services__grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.service-card{
  background:#fff;border:1px solid var(--line);border-radius:18px;padding:40px 32px;
  transition:transform .3s, box-shadow .3s, border-color .3s;position:relative;overflow:hidden;
}
.service-card::before{
  content:"";position:absolute;top:0;left:0;width:100%;height:4px;
  background:linear-gradient(90deg,var(--blue),var(--gold));transform:scaleX(0);transform-origin:left;transition:transform .35s;
}
.service-card:hover{transform:translateY(-8px);box-shadow:var(--shadow);border-color:transparent}
.service-card:hover::before{transform:scaleX(1)}
.service-card__icon{
  width:64px;height:64px;border-radius:16px;display:grid;place-items:center;
  background:var(--blue-soft);color:var(--blue);margin-bottom:22px;
}
.service-card__icon svg{width:30px;height:30px}
.service-card h3{font-size:22px;font-weight:900;color:var(--navy);margin-bottom:14px}
.service-card p{color:var(--muted);font-size:15px;margin-bottom:20px}
.service-card__tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.service-card__tags li{
  font-size:12.5px;color:var(--blue);background:var(--blue-soft);
  padding:5px 12px;border-radius:999px;font-weight:500;
}

/* ===== Company ===== */
.company{background:var(--bg)}
.company__table-wrap{max-width:840px;margin-inline:auto}
.company__table{width:100%;border-collapse:collapse}
.company__table th,.company__table td{
  text-align:left;padding:20px 22px;border-bottom:1px solid var(--line);vertical-align:top;
}
.company__table th{
  width:200px;color:var(--navy);font-weight:700;background:var(--bg-soft);
  white-space:nowrap;font-size:15px;
}
.company__table td{color:var(--ink);font-size:15.5px}
.company__table a{color:var(--blue);font-weight:700}

/* ===== Contact ===== */
.contact{
  background:linear-gradient(135deg,var(--navy) 0%,var(--navy-2) 100%);
  position:relative;overflow:hidden;
}
.contact::before{
  content:"";position:absolute;top:-120px;right:-100px;width:380px;height:380px;
  border-radius:50%;background:radial-gradient(circle,rgba(47,109,240,.4),transparent 70%);
}
.contact__lead{text-align:center;color:rgba(255,255,255,.85);margin-bottom:50px;position:relative}
.contact__grid{display:grid;grid-template-columns:1.4fr 1fr;gap:44px;position:relative;align-items:start}
.contact__form{background:#fff;border-radius:20px;padding:38px 36px;box-shadow:var(--shadow)}
.field{margin-bottom:20px}
.field label{display:block;font-weight:700;font-size:14.5px;color:var(--navy);margin-bottom:8px}
.field label span{
  font-size:11px;color:#fff;background:var(--blue);padding:2px 8px;border-radius:4px;
  margin-left:8px;font-weight:700;vertical-align:middle;
}
.field input,.field select,.field textarea{
  width:100%;padding:13px 15px;border:1.5px solid var(--line);border-radius:10px;
  font-family:inherit;font-size:15px;color:var(--ink);background:#fff;transition:border-color .2s, box-shadow .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:0;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,109,240,.15);
}
.field textarea{resize:vertical}
.form__note{margin-top:14px;font-size:14px;font-weight:700;text-align:center;min-height:20px;white-space:pre-line}
.form__note.is-ok{color:#1a9d63}
.form__note.is-err{color:#d8443c}
.hp-field{position:absolute;left:-9999px;width:1px;height:1px;overflow:hidden}
.btn:disabled{opacity:.6;cursor:wait;transform:none!important;box-shadow:none!important}
.contact__info{color:#fff;padding-top:6px}
.contact__info h3{font-size:16px;font-weight:700;margin-bottom:10px;color:#fff}
.contact__info h3:not(:first-child){margin-top:32px}
.contact__tel{
  display:inline-block;font-family:"Montserrat";font-weight:800;font-size:32px;
  color:#fff;letter-spacing:.02em;line-height:1.2;
}
.contact__hours{color:rgba(255,255,255,.7);font-size:14px;margin-top:4px}
.contact__addr{color:rgba(255,255,255,.85);font-size:15px}

/* ===== Footer ===== */
.footer{background:#07142a;color:rgba(255,255,255,.8);padding:50px 0 30px}
.footer__inner{display:flex;flex-direction:column;align-items:center;gap:22px;text-align:center}
.footer__brand{display:flex;align-items:center;gap:12px}
.footer__logo{height:42px;width:auto}
.footer__nav{display:flex;flex-wrap:wrap;justify-content:center;gap:26px}
.footer__nav a{font-size:14px;color:rgba(255,255,255,.75);transition:color .2s}
.footer__nav a:hover{color:#fff}
.footer__copy{font-size:12.5px;color:rgba(255,255,255,.5);letter-spacing:.04em}

/* ===== To top ===== */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--blue);color:#fff;display:grid;place-items:center;font-size:20px;
  box-shadow:0 10px 24px rgba(47,109,240,.45);opacity:0;visibility:hidden;
  transform:translateY(12px);transition:.3s;z-index:90;
}
.to-top.is-visible{opacity:1;visibility:visible;transform:translateY(0)}
.to-top:hover{background:var(--navy)}

/* ===== Reveal animation ===== */
.reveal{opacity:0;transform:translateY(32px);transition:opacity .7s ease, transform .7s ease}
.reveal.is-in{opacity:1;transform:none}

/* ===== Responsive ===== */
.sp-br{display:none}
@media(max-width:900px){
  .about__grid{grid-template-columns:1fr;gap:40px}
  .services__grid{grid-template-columns:1fr;gap:22px}
  .contact__grid{grid-template-columns:1fr;gap:30px}
}
@media(max-width:768px){
  .section{padding:80px 0}
  .hamburger{display:flex}
  .nav{
    position:fixed;inset:0 0 0 auto;width:78%;max-width:320px;height:100vh;
    background:var(--navy);padding:100px 32px 40px;transform:translateX(100%);
    transition:transform .35s ease;box-shadow:-20px 0 50px rgba(0,0,0,.3);
  }
  .nav.is-open{transform:translateX(0)}
  .nav__list{flex-direction:column;align-items:flex-start;gap:26px}
  .nav__list a{color:#fff!important;font-size:17px}
  .header.is-scrolled .nav__list a{color:#fff!important}
  .hamburger.is-active span{background:#fff!important}
  .hamburger.is-active span:nth-child(1){transform:translateY(7px) rotate(45deg)}
  .hamburger.is-active span:nth-child(2){opacity:0}
  .hamburger.is-active span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
  .sp-br{display:inline}
  .logo__img{height:38px}
  .header.is-scrolled .logo__img{height:34px}
  .hero__actions .btn{flex:1}
  .company__table th{width:120px;font-size:13.5px;padding:16px 14px}
  .company__table td{font-size:14.5px;padding:16px 14px}
  .contact__form{padding:28px 22px}
}