:root{--navy:#1f4570;--bg:#f5f5f5;--pale:#e6eef1;--text:#333}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:"Noto Sans JP",sans-serif;color:var(--text);line-height:1.9;background:#fff}
a{color:inherit;text-decoration:none}
.en{font-family:"Josefin Sans",sans-serif;letter-spacing:.06em}
header{position:fixed;top:0;left:0;right:0;height:64px;background:#fff;display:flex;align-items:center;justify-content:space-between;padding:0 40px;z-index:10}
.logo{font-weight:700;font-size:20px;color:var(--navy)}
nav{display:flex;align-items:center;gap:24px;font-size:14px}
nav .btn{background:var(--navy);color:#fff;padding:10px 28px;border-radius:30px}
.hero{background:var(--bg);padding:130px 0 90px;overflow:hidden}
.hero h1{font-size:64px;color:var(--navy);padding:0 80px;line-height:1.2}
.hero p.sub{color:var(--navy);padding:16px 80px 0;font-weight:500}
.visual{margin:60px 0 0 25%;height:420px;border-radius:300px 0 0 300px;background:linear-gradient(120deg,#9fb9d3,#1f4570);position:relative;display:flex;align-items:center}
.visual .catch{position:absolute;left:12%;font-size:44px;color:#fff;line-height:1.8}
section{padding:110px 20px}
.inner{max-width:880px;margin:0 auto}
.ttl{text-align:center;margin-bottom:56px;color:var(--navy)}
.ttl h2{font-size:46px;font-weight:400;line-height:1.3}
.ttl span{font-size:15px;font-weight:500}
.about p{margin-bottom:1.2em}
.about h3{text-align:center;color:var(--navy);font-size:22px;margin-bottom:28px}
.gray{background:var(--pale)}
.biz{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.biz div{background:#fff;padding:32px;border-radius:6px}
.biz b{font-size:32px;color:var(--navy);display:block}
.biz h3{font-size:17px;color:var(--navy);margin:4px 0 8px}
.biz p{font-size:14px}
.company{background:var(--bg)}
dl{display:grid;grid-template-columns:160px 1fr;border-top:1px solid #ccc}
dt,dd{padding:20px 12px;border-bottom:1px solid #ccc}
dt{font-weight:700;color:var(--navy)}
.contact-box{text-align:center}
.contact-box a.big{display:inline-block;margin-top:16px;background:var(--navy);color:#fff;padding:14px 44px;border-radius:40px}
footer{background:var(--navy);color:#fff;padding:50px 40px 30px;text-align:center;font-size:14px}
footer .links{margin:18px 0;display:flex;justify-content:center;gap:28px;flex-wrap:wrap}
footer small{opacity:.8}
.doc{max-width:820px;margin:0 auto;padding:130px 20px 90px}
.doc h1{color:var(--navy);font-size:30px;margin-bottom:36px;text-align:center}
.doc h2{color:var(--navy);font-size:18px;margin:32px 0 8px}
.doc dl{margin-top:10px}
.note{background:#fff7e0;padding:10px 14px;font-size:13px;margin-bottom:24px;border-radius:4px}
@media(max-width:720px){
header{padding:0 16px}nav a:not(.btn){display:none}
.hero h1{font-size:38px;padding:0 20px}.hero p.sub{padding:12px 20px 0;font-size:14px}
.visual{margin-left:10%;height:260px;border-radius:200px 0 0 200px}
.visual .catch{position:static;font-size:24px;padding-left:40px;color:#fff}
.biz{grid-template-columns:1fr}dl{grid-template-columns:1fr}dt{border-bottom:0;padding-bottom:0}
.ttl h2{font-size:36px}}
.logo{display:flex;align-items:center;gap:10px}
.logo img{display:block}
.visual{background-size:cover;background-position:center}
.visual .catch{text-shadow:0 2px 12px rgba(0,0,0,.35)}
.inner.wide{max-width:1100px}
.cards{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.cards article{background:#fff;border-radius:6px;overflow:hidden}
.cards img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}
.cards h3{font-size:16px;color:var(--navy);margin:16px 18px 6px;line-height:1.5}
.cards p{font-size:13px;margin:0 18px 20px;line-height:1.8}
.purpose{margin-left:1.4em;font-size:14px}
.purpose li{margin-bottom:4px;line-height:1.7}
@media(max-width:960px){.cards{grid-template-columns:1fr 1fr}}
@media(max-width:560px){.cards{grid-template-columns:1fr}}
/* --- polish --- */
header{transition:box-shadow .3s}header.scrolled{box-shadow:0 2px 16px rgba(31,69,112,.12)}
.hero{position:relative}
.scroll{position:absolute;left:80px;bottom:28px;color:var(--navy);font-size:12px;letter-spacing:.3em;writing-mode:vertical-rl;padding-bottom:64px}
.scroll::after{content:"";position:absolute;left:50%;bottom:0;width:1px;height:52px;background:var(--navy);animation:drop 2s ease-in-out infinite}
@keyframes drop{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}}
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center}
.about-grid img{width:100%;aspect-ratio:4/5;object-fit:cover;border-radius:0 160px 0 0;display:block}
.about-grid h3{text-align:left;font-size:26px;line-height:1.6}
.cards article{transition:transform .3s,box-shadow .3s}
.cards article:hover{transform:translateY(-6px);box-shadow:0 12px 28px rgba(31,69,112,.18)}
.cards img{transition:transform .5s}.cards article:hover img{transform:scale(1.05)}
.cards article{overflow:hidden}
.company dl{background:#fff;padding:0 24px;border-radius:6px;border-top:0}
.company dt:first-of-type,.company dd:nth-of-type(1){border-top:0}
details summary{cursor:pointer;color:var(--navy);font-size:14px;margin-top:8px;font-weight:500}
details[open] summary{margin-bottom:8px}
.map{display:block;width:100%;height:320px;border:0;border-radius:6px;margin-top:32px;filter:grayscale(.3)}
.contact{background:linear-gradient(135deg,#1f4570,#2f6194);color:#fff}
.contact .ttl{color:#fff}
.contact-box a.big{background:#fff;color:var(--navy);font-weight:700;transition:transform .2s,box-shadow .2s}
.contact-box a.big:hover{transform:translateY(-2px);box-shadow:0 8px 20px rgba(0,0,0,.25)}
nav a:not(.btn){position:relative}
nav a:not(.btn)::after{content:"";position:absolute;left:0;right:0;bottom:-4px;height:1px;background:var(--navy);transform:scaleX(0);transition:transform .25s}
nav a:not(.btn):hover::after{transform:scaleX(1)}
nav .btn{transition:opacity .2s}nav .btn:hover{opacity:.85}
.js .rv{opacity:0;transform:translateY(24px);transition:opacity .8s ease,transform .8s ease}
.js .rv.in{opacity:1;transform:none}
@media(max-width:720px){.about-grid{grid-template-columns:1fr;gap:28px}.about-grid h3{font-size:22px}.scroll{display:none}.company dl{padding:0 12px}.map{height:240px}}
@media(prefers-reduced-motion:reduce){.js .rv{opacity:1;transform:none;transition:none}.scroll::after{animation:none}}
.about-grid img{object-position:30% top}
/* --- photo pass --- */
.visual{background-image:url(images/hero.jpg);background-size:cover;background-position:center 30%;margin-left:32%}
.visual .catch{left:-31%;color:var(--navy);text-shadow:none;font-size:40px}
.about-grid img{aspect-ratio:4/3;object-position:center}
@media(max-width:720px){
.visual{margin-left:10%;background-image:linear-gradient(120deg,rgba(31,69,112,.45),rgba(31,69,112,.7)),url(images/hero.jpg)}
.visual .catch{position:static;color:#fff;text-shadow:0 2px 10px rgba(0,0,0,.4);font-size:24px}}