*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:Arial,'Noto Sans KR',sans-serif;color:#18202a;line-height:1.65;background:#fff}a{text-decoration:none;color:inherit}.container{width:min(1180px,92%);margin:0 auto}.topbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid #e7e9ee}.nav{height:78px;display:flex;align-items:center;justify-content:space-between}.brand img{width:230px;max-height:58px;object-fit:contain;display:block}nav{display:flex;gap:26px;align-items:center}nav a{font-weight:800;color:#26313e;font-size:15px}nav a:hover{color:#d90012}.menu-toggle{display:none;background:#111;color:#fff;border:0;padding:9px 12px;border-radius:4px;font-weight:900}.hero{position:relative;min-height:760px;background:url('assets/hero.jpg') center/cover no-repeat;color:#fff;display:flex;align-items:center}.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,15,20,.92),rgba(10,15,20,.55),rgba(10,15,20,.20))}.hero-content{position:relative;z-index:1;padding:110px 0}.eyebrow,.section-label{color:#e50012;font-size:13px;font-weight:900;letter-spacing:2px;margin:0 0 12px}.hero h1{font-size:clamp(44px,7vw,86px);line-height:1.08;letter-spacing:-2px;margin:0 0 24px}.hero p:not(.eyebrow){font-size:21px;color:#eef2f6;max-width:760px}.hero-buttons{display:flex;gap:14px;flex-wrap:wrap;margin-top:34px}.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 24px;border-radius:4px;font-weight:900;border:0;cursor:pointer}.btn.primary{background:#e50012;color:#fff}.btn.secondary{background:rgba(255,255,255,.12);color:#fff;border:1px solid rgba(255,255,255,.45)}.section{padding:92px 0}.intro-strip{padding:34px 0;background:#111923;color:#fff}.strip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}.strip-grid strong{display:block;font-size:36px;color:#fff;line-height:1}.strip-grid span{color:#cad1da;font-weight:800}.two-col{display:grid;grid-template-columns:1.05fr .95fr;gap:58px;align-items:start}h2{font-size:clamp(32px,4vw,50px);line-height:1.2;letter-spacing:-1px;margin:0 0 22px}h3{font-size:22px;margin:0 0 12px}.lead{font-size:20px;color:#344054}.about p:not(.section-label){color:#465364}.mission-card{background:#f5f7fa;border-left:6px solid #e50012;padding:36px;box-shadow:0 18px 50px rgba(16,24,40,.08)}.mission-card p{font-size:24px;font-weight:900;color:#111;margin:0 0 28px}.mission-card li{margin:10px 0;font-weight:800}.dark{background:#111923;color:#fff}.business-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px}.business-grid article{background:#1a2532;padding:30px;border:1px solid rgba(255,255,255,.08);border-top:4px solid #e50012;min-height:210px}.business-grid span{color:#e50012;font-size:30px;font-weight:900}.business-grid p{color:#cbd5e1;margin:0}.clients{background:#fff}.client-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-top:30px}.client-grid div{background:#f5f7fa;border:1px solid #e1e5ea;padding:25px 14px;text-align:center;font-size:22px;font-weight:900;border-radius:8px}.client-grid span{display:block;font-size:13px;color:#667085;margin-top:8px}.projects{background:#f6f7f9}.section-head{display:flex;justify-content:space-between;gap:30px;align-items:end;margin-bottom:32px}.section-head p:last-child{max-width:420px;color:#667085;font-weight:700}.project-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.project-card{background:#fff;border-radius:10px;overflow:hidden;box-shadow:0 14px 35px rgba(16,24,40,.08);border:1px solid #e5e7eb}.project-card img{width:100%;height:250px;object-fit:cover;display:block}.project-card div{padding:22px}.project-card span{font-size:12px;color:#e50012;font-weight:900;letter-spacing:.8px}.project-card h3{font-size:20px;line-height:1.3;margin-top:6px}.project-card p{color:#667085;margin:0}.esg{background:#101820;color:#fff}.esg-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:30px}.esg-grid article{background:#182536;padding:28px;border-radius:8px;border:1px solid rgba(255,255,255,.08)}.esg-grid p{color:#cbd5e1}.proposal{background:#fff}.notice{padding:16px;background:#fff4f4;border-left:4px solid #e50012;color:#5b2b2b}.contact-form{background:#f5f7fa;padding:30px;border-radius:10px;border:1px solid #e1e5ea}.contact-form label{display:block;font-weight:900;margin-bottom:14px}.contact-form input,.contact-form select,.contact-form textarea{width:100%;margin-top:7px;padding:13px 14px;border:1px solid #cfd6df;border-radius:6px;font:inherit;background:#fff}.contact-box{background:#111923;color:#fff;border-radius:10px;padding:42px;display:grid;grid-template-columns:.75fr 1.25fr;gap:40px}.contact-info p{margin:8px 0}.contact-info a{text-decoration:underline}footer{background:#07090c;color:#cbd5e1;padding:34px 0}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:30px}footer img{width:190px;background:#fff;padding:8px;border-radius:4px}@media(max-width:980px){.project-grid,.business-grid{grid-template-columns:repeat(2,1fr)}.client-grid,.esg-grid{grid-template-columns:repeat(2,1fr)}.two-col,.contact-box{grid-template-columns:1fr}.section-head{display:block}}@media(max-width:760px){.nav{height:auto;padding:12px 0;align-items:flex-start}.brand img{width:190px}.menu-toggle{display:block}nav{display:none;position:absolute;left:0;right:0;top:70px;background:#fff;border-bottom:1px solid #e5e7eb;padding:18px 4%;flex-direction:column;align-items:flex-start}.menu-open nav{display:flex}.hero{min-height:650px}.strip-grid,.project-grid,.business-grid,.client-grid,.esg-grid{grid-template-columns:1fr}.project-card img{height:230px}.section{padding:68px 0}.footer-inner{display:block}footer img{margin-bottom:18px}}