:root{--white:#fff;--black:#111;--gray:#e8e8e8;--text:#222;--navy:#111e35}
*{box-sizing:border-box}body{margin:0;font-family:"Yu Gothic","Hiragino Kaku Gothic ProN",sans-serif;color:var(--text);line-height:1.8;background:#fff}img{max-width:100%;display:block}
.container{width:min(1120px,92%);margin:auto}.section{padding:88px 0}.en{font-size:.82rem;letter-spacing:.18em;color:#68758c;font-weight:700;margin:0 0 8px}h1,h2,h3{margin:0 0 14px;color:#fff}h2,h3{color:var(--black)}
.site-header{position:fixed;inset:0 0 auto 0;height:76px;background:rgba(17,30,53,.94);z-index:20}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.logo{color:#fff;text-decoration:none;font-weight:700;letter-spacing:.08em}
.nav{display:flex;gap:16px}.nav a{color:#fff;text-decoration:none;font-size:.92rem}.menu-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem}
.hero{position:relative;min-height:92vh;background:url('../img/hero-ec.svg') center/cover no-repeat;display:flex;align-items:center}.hero-overlay{position:absolute;inset:0;background:linear-gradient(0deg,rgba(0,0,0,.65),rgba(0,0,0,.35))}.hero-content{position:relative;color:#fff;max-width:760px}.lead{margin-bottom:28px}
.btn{display:inline-block;background:var(--navy);color:#fff;border:1px solid #fff;padding:12px 24px;text-decoration:none}
.card-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:#fff;border:1px solid var(--gray);padding:18px}.card h3{margin-top:12px}
.alt{background:#f7f8fa}.works-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.works-grid figure{margin:0;background:#fff;border:1px solid #ddd}.works-grid figcaption{padding:10px;font-size:.9rem}
.points{list-style:none;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.points li{background:#fff;border-left:4px solid var(--navy);padding:18px;border:1px solid #ddd}
.two-col{display:grid;grid-template-columns:.9fr 1.1fr;gap:28px;align-items:center}details{border-bottom:1px solid #ccc;padding:12px 0}summary{cursor:pointer;font-weight:700}
table{width:100%;border-collapse:collapse;background:#fff}th,td{border:1px solid #d6d6d6;padding:12px;text-align:left;vertical-align:top}th{width:26%;background:#f4f4f4}
.map-placeholder{margin-top:18px;border:2px dashed #8992a3;padding:36px;text-align:center;color:#556070}
.contact-form{display:grid;gap:12px;max-width:720px}input,textarea{width:100%;padding:10px;border:1px solid #bbb;font:inherit}textarea{min-height:140px}
.site-footer{background:#0d1422;color:#d6deed;padding:36px 0;text-align:center}.to-top{position:fixed;right:16px;bottom:16px;width:44px;height:44px;border:none;background:var(--navy);color:#fff;border-radius:50%;display:none}.to-top.show{display:block}
@media (max-width:900px){.card-grid,.works-grid,.points,.two-col{grid-template-columns:1fr 1fr}}
@media (max-width:760px){.menu-toggle{display:block}.nav{display:none;position:absolute;top:76px;left:0;right:0;background:#14233f;padding:16px;flex-direction:column}.nav.open{display:flex}.section{padding:68px 0}.card-grid,.works-grid,.points,.two-col{grid-template-columns:1fr}.hero{min-height:80vh}}