:root{--navy:#183c59;--blue:#477da3;--pale:#edf5fa;--mist:#f5f8fa;--ink:#263746;--muted:#647787;--line:#dce6ed;--white:#fff;--gold:#c8ad7c}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:86px}
body{margin:0;color:var(--ink);font-family:"Noto Sans JP","Yu Gothic",Meiryo,sans-serif;line-height:1.85;letter-spacing:.025em}
a{color:inherit;text-decoration:none}
.wrap{width:min(1120px,90%);margin:auto}
.topbar{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);border-bottom:1px solid #e5edf2}
.nav{min-height:76px;display:flex;align-items:center;justify-content:space-between;gap:22px}
.brand{display:flex;align-items:center;gap:12px;white-space:nowrap}
.mark{width:39px;height:39px;border:1.5px solid var(--blue);border-radius:50%;display:grid;place-items:center;color:var(--blue);font-family:Georgia,serif;font-size:21px;position:relative}
.mark:after{content:"";position:absolute;width:21px;height:21px;border:1px solid #9dbbce;border-radius:50%;transform:rotate(-30deg) scaleX(1.4)}
.brand strong{display:block;font-size:17px;letter-spacing:.12em;color:var(--navy)}
.brand small{display:block;font:9px Arial,sans-serif;letter-spacing:.2em;color:var(--muted)}
.links{display:flex;align-items:center;gap:19px;font-size:12px;color:#43596a}
.links a:hover{color:var(--blue)}
.links .contact{padding:10px 17px;background:var(--navy);color:white;border-radius:2px}
.hero{background:linear-gradient(90deg,rgba(239,247,252,.97) 0%,rgba(239,247,252,.91) 43%,rgba(239,247,252,.08) 78%),url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?auto=format&fit=crop&w=2000&q=85') center/cover;min-height:590px;display:flex;align-items:center}
.hero-inner{padding:78px 0}
.eyebrow{font:11px Arial,sans-serif;letter-spacing:.22em;text-transform:uppercase;color:var(--blue);font-weight:bold}
.hero h1{font-size:clamp(34px,4.2vw,54px);font-weight:500;line-height:1.45;letter-spacing:.07em;color:var(--navy);margin:20px 0}
.hero p{max-width:475px;color:#506777;font-size:15px}
.hero .cta{display:inline-flex;align-items:center;gap:24px;margin-top:20px;padding:13px 22px;background:var(--navy);color:#fff;font-size:13px;letter-spacing:.06em}
.arrow{font-size:20px}
.section{padding:88px 0}
.section-head{margin-bottom:38px}
.section-head .en{font:11px Arial,sans-serif;letter-spacing:.22em;color:var(--blue)}
.section-head h2{margin:7px 0 0;font-size:30px;font-weight:500;letter-spacing:.08em;color:var(--navy)}
.section-head p{color:var(--muted);font-size:14px;margin:10px 0 0}
.intro{background:#fff}
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.intro-copy{font-size:15px;color:#526675}
.intro-copy p{margin:0 0 18px}
.quote{border-left:2px solid var(--gold);padding:8px 0 8px 22px;font-size:22px;line-height:1.8;color:var(--navy);letter-spacing:.06em}
.service{background:var(--pale)}
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.service-card{background:rgba(255,255,255,.86);padding:30px 26px;border:1px solid #e0eaf0;min-height:230px}
.num{font:12px Arial,sans-serif;color:var(--blue);letter-spacing:.15em}
.service-card h3{font-weight:500;color:var(--navy);font-size:20px;margin:15px 0 10px}
.service-card p{font-size:13px;color:var(--muted);margin:0}
.greeting{background:#f8fafb}
.greeting-grid{display:grid;grid-template-columns:.7fr 1.3fr;gap:58px;align-items:start}
.greeting-label{border-top:1px solid var(--line);padding-top:18px;color:var(--muted);font-size:13px}
.greeting-text{font-size:15px;color:#526675}
.greeting-text p{margin-top:0}
.signature{margin-top:30px;color:var(--navy);font-size:14px;text-align:right}
.signature strong{font-size:18px;font-weight:500;margin-left:12px}
.company{background:linear-gradient(rgba(238,244,247,.28),rgba(238,244,247,.28)),url('https://images.unsplash.com/photo-1698321007024-c53f23b3ca31?auto=format&fit=crop&w=2000&q=85') center/cover}
.company-grid{display:grid;grid-template-columns:1fr 1fr;gap:54px;align-items:start}
.company-grid>div:first-child{padding:28px;background:rgba(255,255,255,.92);border:1px solid rgba(255,255,255,.75)}
.company .section-head{margin-bottom:22px}
.company-lead{font-size:14px;color:#526675;margin-bottom:0}
.info{width:100%;border-collapse:collapse;background:rgba(255,255,255,.95);font-size:13px}
.info th,.info td{text-align:left;padding:15px 17px;border-bottom:1px solid #d9e5ed;vertical-align:top}
.info th{width:32%;font-weight:500;color:var(--navy);white-space:nowrap}
.faq{background:#fff}
.faq-list{border-top:1px solid var(--line)}
details{border-bottom:1px solid var(--line);padding:19px 4px}
summary{cursor:pointer;color:var(--navy);font-size:15px;list-style:none;display:flex;justify-content:space-between;gap:20px}
summary:after{content:'＋';color:var(--blue)}
details[open] summary:after{content:'－'}
details p{color:var(--muted);font-size:14px;margin:14px 0 0;padding-right:35px}
.news{background:#f2f6f9}
.news-row{display:flex;gap:25px;padding:19px 4px;border-bottom:1px solid #dbe5ec;font-size:14px}
.news-row time{font:12px Arial,sans-serif;color:var(--blue);min-width:95px;padding-top:4px}
.news-row span{color:#536675}
.contact-section{background:var(--navy);color:#fff;padding:78px 0}
.contact-section .section-head h2,.contact-section .section-head .en{color:#fff}
.contact-section .section-head p{color:#d1e0ea}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:45px;align-items:center}
.contact-copy{color:#d7e4ec;font-size:14px}
.contact-actions{display:flex;gap:12px;flex-wrap:wrap}
.contact-actions a{padding:13px 20px;border:1px solid rgba(255,255,255,.55);font-size:13px}
.contact-actions a.primary{background:#fff;color:var(--navy);border-color:#fff}
footer{background:#123149;color:#d4e0e8;padding:25px 0;font-size:11px}
.footer-inner{display:flex;justify-content:space-between;gap:20px;align-items:center}
.footer-brand{letter-spacing:.14em}
.footer-links{display:flex;gap:16px;flex-wrap:wrap}
.copyright{color:#a9bfce}

@media(max-width:900px){.links{gap:10px}
.links a{font-size:11px}
.nav{gap:12px}
.brand strong{font-size:15px}
.intro-grid,.company-grid{gap:30px}
.greeting-grid{gap:35px}
}

@media(max-width:700px){.nav{padding:13px 0;align-items:flex-start;flex-direction:column}
.links{width:100%;overflow-x:auto;padding:3px 0 6px;white-space:nowrap}
.links .contact{padding:7px 12px}
.hero{min-height:530px;background-position:58% center}
.hero-inner{padding:60px 0}
.hero h1{font-size:clamp(26px,6.4vw,34px)}
.hero p{max-width:340px;font-size:14px}
.section{padding:62px 0}
.section-head h2{font-size:26px}
.intro-grid,.greeting-grid,.company-grid,.contact-grid{grid-template-columns:1fr;gap:26px}
.cards{grid-template-columns:1fr}
.service-card{min-height:0;padding:25px}
.quote{font-size:20px}
.info th,.info td{padding:12px 10px}
.info th{width:34%}
.news-row{gap:13px}
.news-row time{min-width:82px}
.footer-inner{align-items:flex-start;flex-direction:column}
.contact-section{padding:62px 0}
}

/* キーボード操作と小さな画面への配慮 */
:focus-visible{outline:3px solid var(--gold);outline-offset:4px}
.skip-link{position:fixed;top:8px;left:8px;z-index:100;padding:10px 16px;background:var(--navy);color:var(--white);transform:translateY(-160%)}
.skip-link:focus{transform:translateY(0)}
summary::-webkit-details-marker{display:none}
.contact-pending{padding:13px 20px;border:1px solid rgba(255,255,255,.55);font-size:13px;color:#d7e4ec}
@media(max-width:700px){html{scroll-padding-top:145px}.contact-actions>*{max-width:100%;overflow-wrap:anywhere}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}}

.company-list{margin:0;padding-left:1.2em}
.info td{overflow-wrap:anywhere}
.info a{text-decoration:underline;text-underline-offset:3px}
.visually-hidden{position:absolute;width:1px;height:1px;margin:-1px;padding:0;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
@media(max-width:700px){.hero{background-image:linear-gradient(90deg,rgba(239,247,252,.96),rgba(239,247,252,.74)),url('https://images.unsplash.com/photo-1486406146926-c627a92ad1ab?auto=format&fit=crop&w=2000&q=85')}.company-grid{min-width:0}.info th{width:28%}.info th,.info td{font-size:12px}}