:root{--navy:#071a36;--blue:#0078cf;--cyan:#23b8ec;--ink:#333;--muted:#6e7888;--line:#dce3ea;--soft:#f4f7fa;--white:#fff;--max:1180px}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Helvetica Neue","Noto Sans JP","Yu Gothic",Meiryo,sans-serif;color:var(--ink);background:#fff;line-height:1.85;letter-spacing:.02em}.container{width:min(calc(100% - 48px),var(--max));margin:auto}.narrow{max-width:840px}.centered{text-align:center}.section{padding:120px 0}.section-soft{background:var(--soft)}.section-dark{background:var(--navy);color:#fff}.site-header{position:fixed;z-index:50;top:0;left:0;right:0;height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 4vw;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid rgba(8,26,54,.08)}.brand img{height:48px;width:auto;display:block}.nav{display:flex;gap:30px}.nav a{color:var(--ink);font-size:12px;letter-spacing:.12em;text-decoration:none;font-weight:700}.menu-toggle{display:none;border:0;background:none;font-size:12px;font-weight:700;letter-spacing:.1em}.hero{min-height:100vh;padding-top:78px;display:grid;align-items:center;position:relative;overflow:hidden}.hero-bg{position:absolute;inset:0;background-image:linear-gradient(180deg,rgba(7,26,54,.62),rgba(7,26,54,.38)), radial-gradient(circle at center, rgba(7,26,54,.18), rgba(7,26,54,.52)), url("assets/hero-bg.png");background-size:cover;background-position:center center;background-repeat:no-repeat}.hero-bg:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(255,255,255,.05),rgba(255,255,255,0))}.hero-inner{position:relative;z-index:2;display:flex;align-items:center;justify-content:center;text-align:center}.hero-copy{max-width:980px;margin:0 auto}.hero-copy h1{font-size:clamp(42px,5.2vw,78px);line-height:1.25;margin:20px 0 28px;letter-spacing:-.03em}.hero-copy h1 span{color:#6ed7ff}.hero-lead{max-width:820px;margin:0 auto;font-size:17px;color:#d8e4ee}.scroll{position:absolute;bottom:34px;left:4vw;color:#fff;font-size:11px;text-decoration:none;letter-spacing:.18em}.eyebrow{font-size:11px;font-weight:800;letter-spacing:.24em;color:var(--blue);margin:0 0 18px}.eyebrow.light{color:#7cd6ff}h2{font-size:clamp(34px,4vw,58px);line-height:1.35;letter-spacing:-.02em;margin:0 0 28px}h3,h4,p{margin-top:0}.two-col{display:grid;grid-template-columns:.95fr 1.05fr;gap:100px}.body-copy p{margin-bottom:20px}.quote{font-size:24px;font-weight:700;line-height:1.6;margin:38px 0!important}.section-head{margin-bottom:58px}.orbit-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:14px;margin:60px 0 36px}.orbit{aspect-ratio:1;border:1px solid #c7d6e4;border-radius:50%;display:grid;place-items:center;font-weight:700;background:#fff;box-shadow:0 10px 32px rgba(12,45,78,.05)}.concept-text{max-width:820px;text-align:center;margin:0 auto;color:#536072}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.card{border:1px solid var(--line);padding:38px 32px 36px;min-height:430px;position:relative;background:#fff}.card-no{font-size:12px;color:var(--blue);font-weight:800}.card h3{font-size:23px;margin:50px 0 4px}.card h4{font-size:16px;margin-bottom:24px}.card p{font-size:14px;color:#596577}.steps article{display:grid;grid-template-columns:120px 1fr;gap:44px;padding:38px 0;border-top:1px solid rgba(255,255,255,.16)}.steps article:last-child{border-bottom:1px solid rgba(255,255,255,.16)}.steps span{font-size:58px;font-weight:300;color:#70d8ff;line-height:1}.steps h3{font-size:14px;letter-spacing:.18em;color:#70d8ff;margin-bottom:4px}.steps h4{font-size:24px;margin-bottom:10px}.steps p{color:#cbd7e2;max-width:700px}.strength-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:40px}.strength-grid article{padding-top:28px;border-top:2px solid var(--ink)}.strength-grid span{font-size:12px;color:var(--blue);font-weight:700}.strength-grid h3{font-size:22px;margin:24px 0 14px}.strength-grid p{color:#647084;font-size:14px}.message-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:80px;align-items:center}.portrait{overflow:hidden;aspect-ratio:1/1}.portrait img{width:100%;height:100%;object-fit:cover}.message-copy p{color:#4f5c6d}.signature{margin-top:32px!important;color:var(--ink)!important}.name-section{overflow:hidden}.name-mark{text-align:center;margin:10px 0 30px}.name-mark img{width:180px}.name-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:36px auto;max-width:820px}.name-grid div{padding:30px;text-align:center;border-right:1px solid var(--line)}.name-grid div:last-child{border-right:0}.name-grid strong{display:block;font-size:40px;color:var(--navy);letter-spacing:.08em}.name-grid span{font-size:13px;color:#667285}.name-copy{max-width:760px;margin:auto;text-align:center}.philosophy p{color:#ccd7e1}.company-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:80px}.company-list{margin:0}.company-list div{display:grid;grid-template-columns:150px 1fr;padding:22px 0;border-top:1px solid var(--line)}.company-list div:last-child{border-bottom:1px solid var(--line)}.company-list dt{font-size:13px;font-weight:700}.company-list dd{margin:0;color:#4f5b6b}.closing{padding:110px 0}.closing-icon{width:110px;opacity:.9;margin-bottom:20px}.closing p{color:#ccd8e2}.closing-copy{margin-top:30px!important;color:#79d9ff!important;font-weight:700;font-size:18px}.footer{background:#04101f;color:#aab8c7;padding:45px 0}.footer-inner{display:flex;align-items:flex-end;justify-content:space-between;gap:50px}.footer-logo{height:54px;width:auto;filter:brightness(1.5)}.footer p,.footer small{font-size:11px;margin:0}.footer small{display:block;margin-top:8px}
@media(max-width:900px){.nav{display:none;position:absolute;top:78px;left:0;right:0;background:#fff;padding:24px 6vw;flex-direction:column;border-top:1px solid var(--line)}.nav.open{display:flex}.menu-toggle{display:block}.two-col,.message-grid,.company-grid{grid-template-columns:1fr}.section{padding:88px 0}.two-col,.message-grid,.company-grid{gap:48px}.orbit-grid{grid-template-columns:repeat(3,1fr)}.cards,.strength-grid{grid-template-columns:1fr}.card{min-height:auto}.steps article{grid-template-columns:70px 1fr;gap:22px}.steps span{font-size:42px}.footer-inner{align-items:flex-start;flex-direction:column}.company-list div{grid-template-columns:110px 1fr}}
@media(max-width:600px){.container{width:min(calc(100% - 32px),var(--max))}.site-header{height:68px}.brand img{height:40px}.nav{top:68px}.hero{padding-top:68px}.hero-copy h1{font-size:40px}.hero-lead{font-size:15px}.section{padding:72px 0}.orbit-grid{grid-template-columns:repeat(2,1fr)}.quote{font-size:20px}.steps article{grid-template-columns:1fr}.steps span{margin-bottom:4px}.name-grid{grid-template-columns:1fr}.name-grid div{border-right:0;border-bottom:1px solid var(--line)}.name-grid div:last-child{border-bottom:0}.company-list div{grid-template-columns:1fr;gap:8px}.footer-logo{height:48px}}

/* --- motion & gradient enhancements --- */
:root{--grad:linear-gradient(135deg,#006fd6 0%,#00a6e8 45%,#62d9ff 100%);--grad-deep:linear-gradient(135deg,#071a36 0%,#0d3d78 48%,#008bd8 100%)}
.site-header{transition:height .35s ease,background .35s ease,box-shadow .35s ease,border-color .35s ease}
.site-header.scrolled{background:rgba(255,255,255,.985);box-shadow:0 10px 30px rgba(7,26,54,.08);border-bottom-color:transparent}
.brand img{transition:transform .35s ease,filter .35s ease}.brand:hover img{transform:translateY(-1px) scale(1.015)}
.nav a{position:relative}.nav a:after{content:"";position:absolute;left:0;right:100%;bottom:-8px;height:2px;background:var(--grad);transition:right .3s ease}.nav a:hover:after{right:0}
.eyebrow{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}.eyebrow.light{background:linear-gradient(135deg,#8ce9ff,#41bfff,#ffffff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-copy h1 span,.closing-copy,.steps h3,.steps span,.card-no,.strength-grid span{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.section-dark h2,.philosophy h2,.closing h2{background:linear-gradient(135deg,#ffffff 0%,#d8f4ff 52%,#7ad9ff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-bg{transform:scale(1.03);transition:transform .1s linear;will-change:transform}
.hero:before{content:"";position:absolute;z-index:1;inset:0;background:radial-gradient(circle at 50% 42%,rgba(255,255,255,.12),transparent 36%);pointer-events:none}
.hero-copy{animation:heroIn 1.15s cubic-bezier(.2,.7,.2,1) both}.hero-copy .eyebrow{animation-delay:.05s}.hero-copy h1{animation:fadeUp .9s .15s both}.hero-lead{animation:fadeUp .9s .3s both}.scroll{animation:floatY 2.3s ease-in-out infinite}
@keyframes heroIn{from{opacity:0}to{opacity:1}}@keyframes fadeUp{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}@keyframes floatY{0%,100%{transform:translateY(0)}50%{transform:translateY(7px)}}
.reveal{opacity:0;transform:translateY(36px);transition:opacity .8s cubic-bezier(.2,.65,.2,1),transform .8s cubic-bezier(.2,.65,.2,1)}.reveal.in-view{opacity:1;transform:none}.reveal.delay-1{transition-delay:.08s}.reveal.delay-2{transition-delay:.16s}.reveal.delay-3{transition-delay:.24s}.reveal.delay-4{transition-delay:.32s}.reveal.delay-5{transition-delay:.4s}
.card,.strength-grid article,.orbit,.message-grid .portrait,.name-grid div{transition:transform .35s ease,box-shadow .35s ease,border-color .35s ease}.card:hover{transform:translateY(-8px);box-shadow:0 24px 60px rgba(7,26,54,.12);border-color:#9ddcff}.strength-grid article:hover{transform:translateY(-5px)}.orbit:hover{transform:translateY(-6px) scale(1.02);box-shadow:0 18px 42px rgba(0,120,207,.14);border-color:#9bdcff}
.steps article{transition:background .35s ease,padding-left .35s ease}.steps article:hover{background:linear-gradient(90deg,rgba(28,145,211,.10),transparent);padding-left:12px}
.portrait img{transition:transform .7s cubic-bezier(.2,.7,.2,1)}.portrait:hover img{transform:scale(1.035)}
.name-grid strong{background:var(--grad-deep);-webkit-background-clip:text;background-clip:text;color:transparent}

/* hamburger */
.menu-toggle{width:44px;height:44px;padding:10px;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer}
.menu-toggle span{display:block;width:24px;height:2px;border-radius:4px;background:var(--grad-deep);transition:transform .3s ease,opacity .25s ease,width .3s ease}
.menu-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}.menu-toggle.open span:nth-child(2){opacity:0;width:0}.menu-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
@media(max-width:900px){
  .menu-toggle{display:flex;border:0;background:transparent}
  .nav{display:flex;opacity:0;visibility:hidden;transform:translateY(-10px);pointer-events:none;position:absolute;top:78px;left:0;right:0;background:rgba(255,255,255,.985);padding:28px 6vw 34px;flex-direction:column;gap:0;border-top:1px solid var(--line);box-shadow:0 24px 40px rgba(7,26,54,.09);transition:opacity .28s ease,transform .28s ease,visibility .28s ease}
  .nav.open{opacity:1;visibility:visible;transform:none;pointer-events:auto}
  .nav a{font-size:14px;padding:15px 0;border-bottom:1px solid #edf1f5}.nav a:last-child{border-bottom:0}
}
@media(max-width:600px){.nav{top:68px}.hero-bg{background-position:62% center}.hero-copy h1{font-size:clamp(35px,10vw,46px)}.hero-lead{max-width:92%}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}.reveal{opacity:1!important;transform:none!important}}


/* --- dark-background brand assets --- */
.site-header{background:linear-gradient(180deg,rgba(3,12,25,.54),rgba(3,12,25,.08));border-bottom-color:rgba(255,255,255,.12);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.brand{position:relative;display:block;height:52px;min-width:190px}
.brand-logo{position:absolute;left:0;top:50%;transform:translateY(-50%);height:48px;width:auto;display:block;transition:opacity .32s ease,transform .35s ease,filter .35s ease}
.brand-logo-dark{opacity:1}.brand-logo-light{opacity:0}
.site-header .nav a{color:#fff;text-shadow:0 1px 12px rgba(0,0,0,.18)}
.site-header .nav a:after{background:linear-gradient(90deg,#fff,#6fdcff,#d9b94b)}
.site-header .menu-toggle span{background:linear-gradient(90deg,#fff,#8ddfff)}
.site-header.scrolled{background:rgba(255,255,255,.985);box-shadow:0 10px 30px rgba(7,26,54,.08);border-bottom-color:transparent;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}
.site-header.scrolled .brand-logo-dark{opacity:0}.site-header.scrolled .brand-logo-light{opacity:1}
.site-header.scrolled .nav a{color:var(--ink);text-shadow:none}
.site-header.scrolled .menu-toggle span{background:var(--grad-deep)}
.brand:hover .brand-logo{transform:translateY(-51%) scale(1.015)}
.footer-logo{filter:none;height:58px}
@media(max-width:900px){
  .brand{height:46px;min-width:166px}.brand-logo{height:42px}
  .site-header:not(.scrolled) .nav{background:rgba(4,16,31,.97);border-top-color:rgba(255,255,255,.12);box-shadow:0 24px 45px rgba(0,0,0,.24)}
  .site-header:not(.scrolled) .nav a{color:#fff;border-bottom-color:rgba(255,255,255,.11)}
  .site-header.scrolled .nav{background:rgba(255,255,255,.985)}
}
@media(max-width:600px){.brand{height:42px;min-width:150px}.brand-logo{height:38px}.footer-logo{height:52px}}

/* --- contact CTA --- */
.contact-button{display:inline-flex;align-items:center;justify-content:center;gap:18px;margin-top:38px;padding:17px 30px;border-radius:999px;text-decoration:none;font-weight:800;font-size:14px;letter-spacing:.06em;color:#fff;background:linear-gradient(135deg,#006fd6 0%,#00a6e8 52%,#62d9ff 100%);box-shadow:0 12px 34px rgba(0,126,210,.28);position:relative;overflow:hidden;isolation:isolate;transition:transform .3s ease,box-shadow .3s ease}
.contact-button:before{content:"";position:absolute;inset:0;background:linear-gradient(110deg,transparent 25%,rgba(255,255,255,.28) 47%,transparent 69%);transform:translateX(-130%);transition:transform .65s ease;z-index:-1}
.contact-button:hover{transform:translateY(-3px);box-shadow:0 18px 42px rgba(0,153,225,.36)}
.contact-button:hover:before{transform:translateX(130%)}
.contact-arrow{font-size:18px;line-height:1;transition:transform .3s ease}.contact-button:hover .contact-arrow{transform:translate(3px,-3px)}
.contact-button:focus-visible{outline:3px solid rgba(126,225,255,.55);outline-offset:4px}
@media(max-width:600px){.contact-button{width:100%;max-width:360px;padding:16px 22px;margin-top:30px;font-size:13px}}

/* --- v6 requested refinements --- */
.hero-copy h1 span{background:linear-gradient(135deg,#f4fdff 0%,#dff7ff 48%,#bcecff 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
@media(max-width:600px){
  h2{font-size:30px}
  .hero-copy h1{font-size:clamp(31px,9.2vw,42px)}
}