:root{
  --blue:#1C3FA7;--blue-deep:#142F85;--blue-bright:#2F6BFF;
  --blue-50:#EEF3FC;--blue-100:#DCE7FB;--blue-200:#B9CDF7;
  --ink:#10203F;--ink-2:#3C4A66;--ink-3:#6B7893;
  --line:#E3E9F4;--bg:#FFFFFF;
  --radius:18px;--radius-sm:12px;
  --shadow:0 10px 30px rgba(31,79,216,.08);
  --max:1120px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:"Noto Sans JP","Hiragino Sans","Hiragino Kaku Gothic ProN","Yu Gothic",system-ui,sans-serif;color:var(--ink);background:var(--bg);line-height:1.8;font-size:16px;letter-spacing:.01em}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
h1,h2,h3{line-height:1.35;margin:0;font-weight:700}
p{margin:0 0 1em}
.container{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-999px;top:0;background:var(--blue);color:#fff;padding:8px 12px;border-radius:8px}
.skip:focus{left:12px;top:12px;z-index:100}

/* header */
.header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.header .container{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink);font-weight:700;letter-spacing:.04em}
.brand:hover{text-decoration:none}
.brand img{width:40px;height:40px}
.brand .name{font-size:18px}
.brand .sub{display:block;font-size:11px;color:var(--ink-3);font-weight:500;letter-spacing:.08em;line-height:1}
.nav{display:flex;gap:28px;align-items:center}
.nav a{color:var(--ink-2);font-size:14.5px;font-weight:500}
.nav a:hover{color:var(--blue);text-decoration:none}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:700;font-size:15px;transition:transform .2s,box-shadow .2s,background .2s;white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff;box-shadow:0 8px 20px rgba(31,79,216,.25)}
.btn-primary:hover{background:var(--blue-deep)}
.btn-ghost{background:#fff;color:var(--blue);border:1.5px solid var(--blue-200)}
.btn-ghost:hover{background:var(--blue-50)}
.nav .btn{padding:9px 18px;font-size:14px}
.nav a.btn-primary{color:#fff}
.hero h1 .accent{white-space:nowrap}
.menu-btn{display:none;background:none;border:1px solid var(--line);border-radius:10px;width:42px;height:42px;cursor:pointer;color:var(--ink)}
@media (max-width:860px){
  .nav{display:none;position:absolute;top:68px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);flex-direction:column;align-items:stretch;gap:0;padding:8px 20px 16px}
  .nav.open{display:flex}
  .nav a{padding:12px 4px;border-bottom:1px solid var(--line)}
  .nav .btn{margin-top:12px;justify-content:center}
  .menu-btn{display:inline-flex;align-items:center;justify-content:center}
}

/* hero */
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#F6F9FF 0%,#fff 100%)}
.hero::before{content:"";position:absolute;inset:auto -10% -30% auto;width:60vw;max-width:760px;aspect-ratio:1;border-radius:50%;background:radial-gradient(circle,rgba(47,107,255,.14),rgba(47,107,255,0) 65%);pointer-events:none}
.hero .container{display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center;padding-top:88px;padding-bottom:96px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;background:var(--blue-50);color:var(--blue);font-size:13px;font-weight:700;padding:6px 14px;border-radius:999px;letter-spacing:.06em;margin-bottom:22px}
.eyebrow::before{content:"";width:8px;height:8px;border-radius:50%;background:var(--blue-bright)}
.hero h1{font-size:clamp(32px,4.6vw,52px);letter-spacing:.01em;color:var(--ink)}
.hero h1 .accent{color:var(--blue)}
.hero .lead{font-size:17px;color:var(--ink-2);margin:22px 0 32px;max-width:560px}
.hero .actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative;display:flex;justify-content:center}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:24px;box-shadow:var(--shadow);padding:26px;width:100%;max-width:420px}
.hero-card .row{display:flex;align-items:center;gap:14px;padding:14px;border-radius:14px;background:var(--blue-50);margin-bottom:12px;animation:float 6s ease-in-out infinite}
.hero-card .row:nth-child(2){animation-delay:1s}.hero-card .row:nth-child(3){animation-delay:2s;margin-bottom:0}
.hero-card .ic{width:42px;height:42px;border-radius:12px;background:#fff;display:grid;place-items:center;color:var(--blue);flex:none;box-shadow:0 2px 8px rgba(31,79,216,.12)}
.hero-card .t{font-weight:700;font-size:15px;line-height:1.4}
.hero-card .d{font-size:13px;color:var(--ink-3);line-height:1.5}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-4px)}}
@media (max-width:860px){.hero .container{grid-template-columns:1fr;padding-top:56px;padding-bottom:64px;gap:36px}.hero-visual{order:2}}

/* sections */
.section{padding:88px 0}
.section.alt{background:var(--blue-50)}
.section-head{max-width:680px;margin-bottom:44px}
.section-head .label{color:var(--blue);font-weight:700;font-size:13px;letter-spacing:.14em;text-transform:uppercase;margin-bottom:10px}
.section-head h2{font-size:clamp(26px,3.2vw,36px)}
.section-head p{color:var(--ink-2);margin-top:14px}
.grid{display:grid;gap:22px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
@media (max-width:860px){.grid-3,.grid-2{grid-template-columns:1fr}}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:30px 28px;box-shadow:0 2px 10px rgba(16,32,63,.03);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.card .icon{width:52px;height:52px;border-radius:14px;background:var(--blue-50);color:var(--blue);display:grid;place-items:center;margin-bottom:18px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--ink-2);font-size:15px;margin:0}
.card ul{margin:14px 0 0;padding:0;list-style:none;font-size:14px;color:var(--ink-2)}
.card li{padding-left:22px;position:relative;margin-bottom:6px}
.card li::before{content:"";position:absolute;left:0;top:11px;width:12px;height:12px;border-radius:50%;background:var(--blue-100);box-shadow:inset 0 0 0 3px #fff,0 0 0 1.5px var(--blue-200)}
.tag{display:inline-block;font-size:12px;font-weight:700;color:var(--blue);background:var(--blue-50);padding:3px 10px;border-radius:999px;margin-bottom:12px}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}
@media (max-width:860px){.steps{grid-template-columns:1fr}}
.step{background:#fff;border-radius:var(--radius);padding:26px 22px;border:1px solid var(--line)}
.step .num{width:36px;height:36px;border-radius:50%;background:var(--blue);color:#fff;font-weight:700;display:grid;place-items:center;margin-bottom:14px;font-size:15px}
.step h3{font-size:17px;margin-bottom:8px}
.step p{font-size:14px;color:var(--ink-2);margin:0}

/* company */
.company{display:grid;grid-template-columns:1fr 1.2fr;gap:40px;align-items:start}
@media (max-width:860px){.company{grid-template-columns:1fr}}
.dl{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden}
.dl div{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:18px 24px;border-bottom:1px solid var(--line);font-size:15px}
.dl div:last-child{border-bottom:0}
.dl dt{color:var(--ink-3);font-weight:600;margin:0}
.dl dd{margin:0;color:var(--ink)}
@media (max-width:520px){.dl div{grid-template-columns:1fr;gap:4px}}
.mission{color:var(--ink-2)}
.mission h3{font-size:22px;margin-bottom:14px;color:var(--ink)}

/* contact */
.contact-box{background:linear-gradient(135deg,var(--blue) 0%,var(--blue-deep) 100%);color:#fff;border-radius:28px;padding:56px 40px;text-align:center;position:relative;overflow:hidden}
.contact-box::after{content:"";position:absolute;right:-80px;top:-80px;width:280px;height:280px;border-radius:50%;background:rgba(255,255,255,.08)}
.contact-box h2{font-size:clamp(24px,3vw,32px);margin-bottom:12px;position:relative}
.contact-box p{color:rgba(255,255,255,.88);max-width:560px;margin:0 auto 28px;position:relative}
.contact-box .btn{background:#fff;color:var(--blue);box-shadow:0 8px 24px rgba(0,0,0,.15);position:relative}
.contact-box .btn:hover{background:var(--blue-50)}
.contact-box .note{font-size:13px;color:rgba(255,255,255,.75);margin:18px 0 0}

/* footer */
.footer{border-top:1px solid var(--line);padding:40px 0;font-size:13.5px;color:var(--ink-3)}
.footer .container{display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap}
.footer nav{display:flex;gap:20px}
.footer a{color:var(--ink-2)}

/* legal page */
.legal{max-width:780px;margin:0 auto;padding:64px 20px 96px}
.legal h1{font-size:30px;margin-bottom:8px}
.legal .meta{color:var(--ink-3);font-size:14px;margin-bottom:36px}
.legal h2{font-size:20px;margin:40px 0 12px;padding-top:8px;border-top:1px solid var(--line)}
.legal h3{font-size:16.5px;margin:20px 0 8px}
.legal p,.legal li{color:var(--ink-2);font-size:15.5px}
.legal ul{padding-left:1.3em}
.legal .box{background:var(--blue-50);border-radius:var(--radius-sm);padding:18px 22px;margin:16px 0}

/* reveal */
.reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){
  .reveal{opacity:1;transform:none;transition:none}
  .hero-card .row{animation:none}
  html{scroll-behavior:auto}
}