:root{
  --navy:#0B1F30;
  --navy-2:#122A3E;
  --navy-3:#0E2436;
  --cyan:#22D3C5;
  --cyan-dark:#12A89C;
  --cyan-tint:#E3FBF7;
  --white:#FFFFFF;
  --text-dark:#10202B;
  --text-gray:#5A6B75;
  --bg-light:#F4F8F9;
  --border:#E1E8EA;
  --muted-navy-text:#9FB4BF;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Malgun Gothic","Apple SD Gothic Neo","Noto Sans KR",sans-serif;
  color:var(--text-dark);background:var(--white);line-height:1.6;-webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit;}
ul{list-style:none;}
img{max-width:100%;display:block;}
.wrap{max-width:1160px;margin:0 auto;padding:0 24px;position:relative;z-index:1;}
.eyebrow{
  display:inline-block;font-size:12.5px;font-weight:800;letter-spacing:2.5px;
  color:var(--cyan-dark);text-transform:uppercase;margin-bottom:14px;
}
.eyebrow-light{color:var(--cyan);}
.section-title{font-size:30px;font-weight:800;color:var(--text-dark);margin-bottom:16px;letter-spacing:-0.5px;line-height:1.35;}
.section-title.light{color:var(--white);}
.section-lead{font-size:15.5px;color:var(--text-gray);max-width:620px;margin-bottom:44px;}
.section-lead.light{color:var(--muted-navy-text);}
.center{text-align:center;margin-left:auto;margin-right:auto;}
section{padding:96px 0;position:relative;overflow:hidden;}

header{
  position:fixed;top:0;left:0;right:0;z-index:1000;background:rgba(11,31,48,0.96);
  backdrop-filter:blur(6px);border-bottom:1px solid rgba(255,255,255,0.08);
}
.nav{display:flex;align-items:center;justify-content:space-between;height:100px;gap:20px;}
.logo-block{display:flex;flex-direction:column;line-height:1.1;}
.logo-img{height:34px;width:auto;display:block;}
.logo{font-size:40px;font-weight:800;color:var(--white);letter-spacing:0.5px;}
.logo-tag{font-size:10px;color:var(--muted-navy-text);font-weight:600;letter-spacing:0.3px;margin-top:4px;}
.nav-links{display:flex;gap:28px;align-items:center;margin-left:auto;}
.nav-links a{font-size:14.5px;font-weight:600;color:#D3E0E6;padding:8px 0;border-bottom:2px solid transparent;transition:border-color .15s,color .15s;}
.nav-links a:hover{border-bottom-color:var(--cyan);color:var(--white);}
.nav-cta{
  background:var(--cyan);color:var(--navy)!important;padding:11px 20px;border-radius:8px;
  font-weight:800!important;font-size:14px;white-space:nowrap;transition:background .15s;
}
.nav-cta:hover{background:#3EE6D8;}
.hamburger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px;}
.hamburger span{width:22px;height:2px;background:var(--white);display:block;}
.mobile-menu{display:none;position:fixed;top:100px;left:0;right:0;bottom:0;background:var(--navy);z-index:999;padding:32px 24px;}
.mobile-menu.open{display:block;}
.mobile-menu a{display:block;padding:16px 0;font-size:18px;font-weight:700;color:var(--white);border-bottom:1px solid rgba(255,255,255,0.1);}

/* HERO */
.hero{background:linear-gradient(160deg,var(--navy) 0%,var(--navy-2) 100%);padding:196px 0 88px;color:var(--white);}
.hero-glow{position:absolute;top:-200px;right:-160px;width:600px;height:600px;border-radius:50%;
  background:radial-gradient(circle,rgba(34,211,197,0.16) 0%,transparent 70%);z-index:0;}
.hero-grid{display:grid;grid-template-columns:1.15fr 0.85fr;gap:56px;align-items:center;}
.hero h1{font-size:44px;font-weight:800;line-height:1.35;letter-spacing:-1px;margin-bottom:20px;}
.hero h1 .hl-accent{color:var(--cyan);}
.hero-left p{font-size:16px;color:#B9C9D1;max-width:480px;margin-bottom:30px;}
.metric-row{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:34px;}
.metric-chip{
  display:flex;align-items:center;gap:10px;background:rgba(255,255,255,0.05);
  border:1px solid rgba(255,255,255,0.12);border-radius:12px;padding:10px 14px;
}
.metric-chip .mc-icon{
  width:32px;height:32px;border-radius:8px;background:rgba(34,211,197,0.15);color:var(--cyan);
  display:flex;align-items:center;justify-content:center;flex-shrink:0;
}
.mc-title{font-size:13px;font-weight:800;color:var(--white);}
.mc-sub{font-size:10.5px;color:var(--muted-navy-text);}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;}
.btn{display:inline-block;padding:15px 26px;border-radius:8px;font-size:15px;font-weight:700;cursor:pointer;border:2px solid transparent;transition:transform .12s,background .15s;}
.btn:active{transform:scale(0.98);}
.btn-primary{background:var(--cyan);color:var(--navy);}
.btn-primary:hover{background:#3EE6D8;}
.btn-outline{background:transparent;color:var(--white);border-color:rgba(255,255,255,0.4);}
.btn-outline:hover{background:rgba(255,255,255,0.1);}
.btn-cyan-outline{background:transparent;color:var(--navy);border-color:var(--navy);}
.btn-cyan-outline:hover{background:var(--navy);color:var(--white);}

.hero-card{
  background:var(--white);border-radius:18px;box-shadow:0 24px 60px rgba(0,0,0,0.3);
  padding:28px;color:var(--text-dark);
}
.hero-card-title{font-size:14px;font-weight:800;color:var(--text-dark);margin-bottom:18px;}
.hc-item{display:flex;align-items:center;gap:12px;padding:12px 0;border-bottom:1px solid var(--border);}
.hc-item:last-of-type{border-bottom:none;}
.hc-icon{width:34px;height:34px;border-radius:9px;background:var(--cyan-tint);color:var(--cyan-dark);display:flex;align-items:center;justify-content:center;flex-shrink:0;}
.hc-name{font-size:13.5px;font-weight:800;color:var(--text-dark);}
.hc-desc{font-size:11.5px;color:var(--text-gray);}
.hero-card-link{display:block;margin-top:16px;font-size:13px;font-weight:700;color:var(--cyan-dark);}

/* PROBLEM SECTION */
.icon-row-4{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:8px;}
.problem-card{background:var(--bg-light);border:1px solid var(--border);border-radius:16px;padding:26px 20px;text-align:center;}
.problem-card .pc-icon{
  width:48px;height:48px;border-radius:50%;background:var(--cyan-tint);color:var(--cyan-dark);
  display:flex;align-items:center;justify-content:center;margin:0 auto 16px;
}
.problem-card h3{font-size:15px;font-weight:800;margin-bottom:6px;}
.problem-card p{font-size:13px;color:var(--text-gray);line-height:1.5;}

/* TECH SECTION */
.tech-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:8px;}
.tech-card{background:var(--white);border:1px solid var(--border);border-radius:16px;padding:28px 22px;}
.tech-card .tc-icon{
  width:56px;height:56px;border-radius:14px;background:var(--navy);color:var(--cyan);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.tech-card h3{font-size:16px;font-weight:800;margin-bottom:4px;}
.tech-card .tc-tag{font-size:12px;color:var(--cyan-dark);font-weight:700;margin-bottom:10px;display:block;}
.tech-card p{font-size:13.5px;color:var(--text-gray);line-height:1.6;}

/* PROCESS */
.step-row{display:flex;align-items:flex-start;justify-content:space-between;margin-top:44px;flex-wrap:nowrap;gap:16px;overflow-x:auto;}
.step-item{display:flex;flex-direction:column;align-items:center;text-align:center;width:150px;flex-shrink:0;}
.step-num-circle{
  width:64px;height:64px;border-radius:50%;background:var(--bg-light);border:2px solid var(--cyan);
  display:flex;align-items:center;justify-content:center;margin-bottom:14px;color:var(--cyan-dark);
}
.step-text{display:flex;flex-direction:column;min-width:0;}
.step-tag{font-size:10.5px;font-weight:800;letter-spacing:1px;color:var(--cyan-dark);margin-bottom:4px;white-space:nowrap;}
.step-label{font-size:15px;font-weight:800;color:var(--text-dark);margin-bottom:6px;white-space:nowrap;}
.step-desc{font-size:12px;color:var(--text-gray);line-height:1.5;}
.step-arrow{color:var(--border);font-size:22px;padding-top:22px;flex-shrink:0;}

/* VEHICLE SCOPE */
.vehicle-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:8px;}
.vehicle-card{background:var(--bg-light);border:1px solid var(--border);border-radius:16px;padding:26px 22px;}
.vehicle-card .vc-icon{
  width:52px;height:52px;border-radius:50%;background:var(--white);border:1px solid var(--border);color:var(--cyan-dark);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.vehicle-card h3{font-size:15.5px;font-weight:800;margin-bottom:6px;}
.vehicle-card p{font-size:13px;color:var(--text-gray);line-height:1.5;}
.scope-label{font-size:13px;font-weight:800;letter-spacing:1px;color:var(--cyan-dark);margin:36px 0 16px;text-transform:uppercase;}
.scope-label:first-of-type{margin-top:8px;}

/* MISSION / SOCIAL VALUE (dark) */
.mission-dark{background:linear-gradient(135deg,var(--navy) 0%,var(--navy-3) 100%);}
.mission-desc{font-size:16px;color:#BCCDD4;max-width:600px;margin-bottom:44px;line-height:1.75;}
.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:760px;margin-bottom:52px;}
.stat-card{background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.12);border-radius:14px;padding:26px 22px;}
.stat-num{font-size:32px;font-weight:800;color:var(--cyan);margin-bottom:6px;}
.stat-label{font-size:13px;color:var(--muted-navy-text);line-height:1.45;}
.roadmap-light{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.rm-item-l{border-top:3px solid var(--cyan);padding-top:16px;}
.rm-year-l{font-size:20px;font-weight:800;color:var(--white);margin-bottom:8px;}
.rm-desc-l{font-size:13px;color:var(--muted-navy-text);line-height:1.5;}

/* CTA / CONTACT */
.cta-dark{background:var(--navy-2);}
.cta-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;}
.contact-lead-dark{font-size:15px;color:#AEC2C9;max-width:440px;margin-bottom:30px;line-height:1.7;}
.contact-card-dark{background:rgba(255,255,255,0.05);border:1px solid rgba(255,255,255,0.12);border-radius:16px;padding:26px;margin-bottom:22px;}
.contact-row-dark{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-bottom:1px solid rgba(255,255,255,0.1);font-size:14px;}
.contact-row-dark:last-child{border-bottom:none;}
.contact-row-dark .label{color:#9FB4BC;font-weight:600;}
.contact-row-dark .value{color:var(--white);font-weight:700;}
.contact-cta-list-dark li{display:flex;gap:14px;margin-bottom:16px;font-size:13.5px;color:#B9C9CE;align-items:flex-start;}
.contact-cta-list-dark .num{
  width:24px;height:24px;border-radius:50%;background:var(--cyan);color:var(--navy);
  display:flex;align-items:center;justify-content:center;font-size:11.5px;font-weight:800;flex-shrink:0;
}

footer{background:#081522;color:#8FA3AB;padding:52px 0 30px;}
.footer-top{display:flex;justify-content:space-between;flex-wrap:wrap;gap:32px;padding-bottom:28px;border-bottom:1px solid rgba(255,255,255,0.08);margin-bottom:22px;}
.footer-logo{font-size:19px;font-weight:800;color:var(--white);margin-bottom:8px;}
.footer-tag{font-size:13px;color:#728389;max-width:320px;}
.footer-info{font-size:13px;line-height:2;}
.footer-info b{color:#C7D5D9;}
.footer-bottom{font-size:12px;color:#59696F;}

@media (max-width:960px){
  .icon-row-4,.tech-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:860px){
  .nav-links{display:none;}
  .hamburger{display:flex;}
  .hero{padding:164px 0 64px;}
  .hero h1{font-size:32px;}
  .hero-grid{grid-template-columns:1fr;}
  .hero-card{margin-top:8px;}
  .section-title{font-size:25px;}
  .icon-row-4,.tech-grid,.vehicle-grid{grid-template-columns:1fr;}
  .step-row{flex-direction:column;align-items:flex-start;overflow-x:visible;}
  .step-arrow{display:none;}
  .step-item{width:100%;flex-direction:row;align-items:center;text-align:left;gap:14px;}
  .step-num-circle{margin-bottom:0;flex-shrink:0;}
  .step-text{flex:1;min-width:0;}
  .step-tag,.step-label{white-space:normal;}
  .roadmap-light{grid-template-columns:repeat(2,1fr);}
  .stat-grid{grid-template-columns:1fr;}
  .cta-grid{grid-template-columns:1fr;}
  section{padding:60px 0;}
}