:root{
  --coway:#00A9E0;
  --coway-dark:#008FBE;
  --coway-deep:#007EA8;
  --coway-soft:#EAF8FD;
  --coway-soft2:#F5FCFF;
  --blue:var(--coway);
  --blue2:#27B7E8;
  --navy:#073B55;
  --ink:#113447;
  --muted:#5F7D8D;
  --soft:var(--coway-soft2);
  --line:#CFEAF5;
  --white:#fff;
  --radius:24px;
  --shadow:0 20px 60px rgba(0,169,224,.13);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,"Segoe UI",Tahoma,Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
a{text-decoration:none;color:inherit}
button{font:inherit}
.container{width:min(1180px,calc(100% - 40px));margin:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(14px);border-bottom:1px solid rgba(219,231,242,.8)}
.nav-wrap{height:76px;display:flex;align-items:center;justify-content:space-between;gap:30px}
.brand{display:flex;align-items:center;gap:12px}
.brand-mark{width:44px;height:44px;border-radius:13px;display:grid;place-items:center;background:linear-gradient(135deg,var(--coway),var(--blue2));color:#fff;font-weight:800;box-shadow:0 10px 24px rgba(0,169,224,.24)}
.brand strong{display:block;font-size:17px;line-height:1.1}
.brand small{display:block;color:var(--muted);font-size:12px;margin-top:4px}
.nav{display:flex;align-items:center;gap:24px;font-size:14px;font-weight:650}
.nav>a:not(.btn){color:#3d5064}
.nav>a:not(.btn):hover{color:var(--blue)}
.menu-btn{display:none;border:0;background:transparent;font-size:26px;cursor:pointer}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;background:var(--blue);color:#fff;padding:14px 22px;font-weight:750;box-shadow:0 10px 24px rgba(0,169,224,.20);transition:.2s ease}
.btn:hover{transform:translateY(-1px);background:var(--coway-dark)}
.btn-sm{padding:10px 16px;font-size:13px}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:none}
.btn-ghost:hover{background:#f8fbfe}
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#FBFEFF,var(--coway-soft))}
.slides{min-height:610px;position:relative}
.slide{position:absolute;inset:0;opacity:0;visibility:hidden;transition:opacity .55s ease}
.slide.active{opacity:1;visibility:visible;position:relative}
.slide-grid{min-height:610px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:70px;padding-top:50px;padding-bottom:60px}
.hero-copy{max-width:650px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.16em;font-weight:800;color:var(--blue);margin-bottom:14px}
.hero h1{font-size:clamp(42px,5vw,72px);line-height:1.08;margin:0 0 22px;letter-spacing:-.04em}
.hero h1 span{color:var(--blue)}
.hero p{font-size:19px;color:#526579;max-width:650px;margin:0 0 30px}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px}
.visual-card{height:420px;border-radius:38px;position:relative;background:radial-gradient(circle at 20% 20%,#fff 0 11%,transparent 12%),linear-gradient(145deg,#E6F8FD,#BFEFFC);box-shadow:var(--shadow);overflow:hidden}
.water-ring{position:absolute;border:2px solid rgba(255,255,255,.65);border-radius:50%}
.r1{width:330px;height:330px;right:-90px;top:-70px}
.r2{width:240px;height:240px;left:-60px;bottom:-40px}
.product-mock{position:absolute;left:50%;top:50%;transform:translate(-50%,-48%);width:170px;height:285px;border-radius:28px;background:linear-gradient(160deg,#fff,#e7f2fb);box-shadow:0 28px 65px rgba(0,126,168,.18);border:1px solid rgba(255,255,255,.8)}
.product-top{width:64px;height:8px;border-radius:20px;background:#D8F0F6;margin:25px auto 12px}
.product-screen{width:95px;height:42px;border-radius:12px;background:#0b2945;color:#62c7ff;display:grid;place-items:center;font-size:12px;letter-spacing:.16em;margin:0 auto}
.product-spout{width:54px;height:15px;background:#BFE5EF;border-radius:8px;margin:34px auto 0}
.product-drop{color:var(--coway);font-size:25px;text-align:center;margin-top:5px}
.product-tray{width:112px;height:10px;border-radius:10px;background:#C7EAF2;margin:26px auto 0}
.float-badge{position:absolute;background:#fff;border:1px solid rgba(255,255,255,.8);box-shadow:0 12px 32px rgba(0,126,168,.12);border-radius:999px;padding:10px 16px;font-size:13px;font-weight:750}
.badge-a{left:28px;top:32px}.badge-b{right:28px;bottom:32px}
.term-card{background:#fff;border-radius:34px;padding:44px;box-shadow:var(--shadow);display:grid;grid-template-columns:auto 1fr auto auto 1fr;align-items:center;gap:16px;border:1px solid #e3edf6}
.term-big{font-size:84px;line-height:1;font-weight:850;color:var(--blue);letter-spacing:-.06em}
.term-card strong{display:block;font-size:28px}
.term-card span{color:var(--muted)}
.term-card .divider{width:1px;height:90px;background:var(--line);margin:0 12px}
.term-card small{grid-column:1/-1;color:var(--muted);margin-top:18px}
.campus-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.campus-card{min-height:180px;border-radius:28px;background:#fff;border:1px solid #e3edf6;box-shadow:0 16px 40px rgba(0,126,168,.07);display:flex;flex-direction:column;align-items:center;justify-content:center;gap:14px}
.campus-card span{font-size:44px}.campus-card b{font-size:18px}
.slide-arrow{position:absolute;top:50%;transform:translateY(-50%);width:46px;height:46px;border-radius:50%;border:1px solid rgba(0,169,224,.14);background:rgba(255,255,255,.84);color:var(--blue);font-size:30px;cursor:pointer;z-index:5;box-shadow:0 10px 25px rgba(0,126,168,.09)}
.slide-arrow.prev{left:18px}.slide-arrow.next{right:18px}
.dots{position:absolute;left:50%;bottom:22px;transform:translateX(-50%);display:flex;gap:8px;z-index:5}
.dot{width:9px;height:9px;padding:0;border:0;border-radius:50%;background:#B8E8F5;cursor:pointer}
.dot.active{width:28px;border-radius:999px;background:var(--blue)}
.stats-strip{background:#fff;border-top:1px solid #e6eef6;border-bottom:1px solid #e6eef6}
.stats{display:grid;grid-template-columns:repeat(3,1fr)}
.stats>div{padding:28px 32px;border-right:1px solid #e6eef6}
.stats>div:last-child{border-right:0}
.stats strong{display:block;font-size:23px;color:var(--blue)}
.stats span{font-size:14px;color:var(--muted)}
.section{padding:100px 0}
.section-soft{background:var(--soft)}
.section-dark{background:linear-gradient(145deg,#06354D,#075E7B);color:#fff}
.section-head{text-align:center;max-width:760px;margin:0 auto 50px}
.section-head h2,.split h2,.about-grid h2,.cta-card h2{font-size:clamp(34px,4vw,52px);line-height:1.15;letter-spacing:-.035em;margin:0 0 18px}
.section-head p,.lead,.about-copy p{color:var(--muted);font-size:18px}
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature{padding:34px;border:1px solid var(--line);border-radius:24px;background:#fff}
.feature .icon{font-size:38px}
.feature h3{font-size:21px;margin:18px 0 10px}
.feature p{color:var(--muted);margin:0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:70px;align-items:start}
.check-list{display:grid;gap:14px}
.check-list>div{display:grid;grid-template-columns:40px 1fr;gap:14px;background:#fff;padding:22px;border-radius:20px;border:1px solid var(--line)}
.check-list span{width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:var(--coway-soft);color:var(--blue);font-weight:900}
.check-list p{margin:0;color:var(--muted)}
.check-list b{color:var(--ink)}
.fineprint{font-size:12px;color:var(--muted);margin-top:24px}
.area-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.area-grid article{border:1px solid var(--line);border-radius:24px;padding:24px;background:#fff}
.area-pic{height:150px;border-radius:18px;background:linear-gradient(145deg,#F2FBFE,#D9F3FB);display:grid;place-items:center;font-size:54px}
.area-grid h3{margin:20px 0 8px}.area-grid p{margin:0;color:var(--muted)}
.section-head.light p,.section-head.light h2{color:#fff}
.section-dark .eyebrow{color:#86DDF5}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.step{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:24px;padding:28px}
.step span{display:inline-block;color:#86DDF5;font-size:14px;font-weight:800;letter-spacing:.12em}
.step h3{font-size:20px;margin:16px 0 8px}.step p{margin:0;color:#bdd0df}
.about-grid{display:grid;grid-template-columns:.75fr 1.25fr;gap:80px;align-items:start}
.about-copy p:first-child{margin-top:0}
.about-copy strong{color:var(--ink)}
.cta-section{padding:30px 0 100px}
.cta-card{background:linear-gradient(135deg,var(--coway),var(--coway-deep));border-radius:34px;padding:52px;color:#fff;display:grid;grid-template-columns:1.3fr .7fr;gap:40px;align-items:center;box-shadow:0 24px 70px rgba(0,169,224,.24)}
.cta-card .eyebrow{color:#bfe0ff}
.cta-card h2{margin-bottom:12px}.cta-card p{margin:0;color:#d9ebff;font-size:18px}
.cta-actions{display:flex;flex-direction:column;gap:12px}
.btn-white{background:#fff;color:var(--blue);box-shadow:none}
.btn-white:hover{background:var(--coway-soft)}
.btn-outline-white{background:transparent;border:1px solid rgba(255,255,255,.55);box-shadow:none}
.btn-outline-white:hover{background:rgba(255,255,255,.08)}
footer{background:#071a2c;color:#d9e6f2;padding:55px 0 22px}
.footer-wrap{display:flex;justify-content:space-between;gap:40px}
.footer-brand .brand-mark{box-shadow:none}.footer-brand strong{color:#fff}
.footer-wrap p{color:#94abc0;max-width:560px}
.footer-links{display:flex;flex-direction:column;gap:10px;align-items:flex-end}
.footer-links a:hover{color:#86DDF5}
.copyright{border-top:1px solid rgba(255,255,255,.1);margin-top:28px;padding-top:18px;font-size:12px;color:#7e96ab}

@media (max-width: 980px){
  .menu-btn{display:block}
  .nav{display:none;position:absolute;top:76px;left:20px;right:20px;background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow);flex-direction:column;align-items:stretch}
  .nav.open{display:flex}
  .slide-grid{grid-template-columns:1fr;gap:34px;padding-top:72px}
  .slides,.slide-grid{min-height:820px}
  .visual-card{height:340px}
  .term-card{max-width:680px}
  .split,.about-grid,.cta-card{grid-template-columns:1fr}
  .feature-grid{grid-template-columns:1fr}
  .area-grid{grid-template-columns:1fr 1fr}
  .steps{grid-template-columns:1fr 1fr}
  .stats{grid-template-columns:1fr}
  .stats>div{border-right:0;border-bottom:1px solid #e6eef6}
}
@media (max-width: 640px){
  .container{width:min(100% - 28px,1180px)}
  .nav-wrap{height:68px}
  .nav{top:68px}
  .hero h1{font-size:42px}
  .hero p{font-size:17px}
  .slides,.slide-grid{min-height:850px}
  .slide-grid{padding-top:55px;padding-bottom:70px}
  .slide-arrow{display:none}
  .term-card{grid-template-columns:auto 1fr;gap:10px;padding:28px}
  .term-card .divider{display:none}
  .term-card small{grid-column:1/-1}
  .term-big{font-size:64px}
  .campus-grid{grid-template-columns:1fr 1fr}
  .campus-card{min-height:135px}
  .section{padding:74px 0}
  .area-grid,.steps{grid-template-columns:1fr}
  .cta-card{padding:34px 24px}
  .footer-wrap{flex-direction:column}
  .footer-links{align-items:flex-start}
  .hero-actions .btn{width:100%}
}


/* ===== Coway visual system v4 ===== */
body{
  background:#fff;
  color:var(--ink);
}
.site-header{
  border-bottom:1px solid var(--line);
}
.brand strong,
.nav>a:not(.btn),
.feature h3,
.area-grid h3,
.step h3,
.check-list b,
.term-card strong,
.campus-card b{
  color:var(--ink);
}
.eyebrow,
.hero h1 span,
.stats strong,
.term-big,
.check-list span,
.dot.active,
.slide-arrow,
.footer-links a:hover{
  color:var(--coway);
}
.btn,
.dot.active{
  background:var(--coway);
}
.btn:hover{
  background:var(--coway-dark);
}
.btn-ghost{
  color:var(--coway-deep);
  border-color:var(--line);
  background:#fff;
}
.btn-ghost:hover{
  background:var(--coway-soft);
}
.visual-card,
.feature,
.area-grid article,
.campus-card,
.term-card,
.check-list>div{
  border-color:var(--line);
}
.feature,
.area-grid article,
.campus-card,
.term-card,
.check-list>div{
  box-shadow:0 10px 30px rgba(0,169,224,.07);
}
.feature:hover,
.area-grid article:hover,
.campus-card:hover,
.check-list>div:hover{
  border-color:#9FDEEF;
}
.feature .icon,
.area-pic{
  background:var(--coway-soft);
}
.stats-strip{
  border-top:1px solid var(--line);
  border-bottom:1px solid var(--line);
}
.stats>div{
  border-right-color:var(--line);
}
.section-soft{
  background:linear-gradient(180deg,#F8FDFF,var(--coway-soft2));
}
.section-dark{
  background:linear-gradient(145deg,#06354D,#075E7B);
}
.step{
  border-color:rgba(113,210,242,.24);
  background:rgba(255,255,255,.07);
}
.step span{
  color:#8CDBF3;
}
.cta-card{
  background:linear-gradient(135deg,var(--coway),var(--coway-deep));
}
.btn-white{
  color:var(--coway-deep);
}
.btn-white:hover{
  background:var(--coway-soft);
}
footer{
  background:#06354D;
}
.footer-brand .brand-mark{
  background:var(--coway);
}
.hero{
  background:linear-gradient(180deg,#FCFEFF,var(--coway-soft));
}
.float-badge{
  color:var(--coway-deep);
  border-color:#C8EDF7;
}
.product-screen{
  background:#06354D;
  color:#7FD8F2;
}
.product-drop{
  color:var(--coway);
}
.menu-btn{
  color:var(--coway-deep);
}
@media (max-width:980px){
  .nav{
    border-color:var(--line);
  }
}


/* ===== Coway Cyan hard override v5 ===== */
:root{
  --coway:#00A9E0;
  --coway-mid:#1DB6E8;
  --coway-dark:#008FBE;
  --coway-deep:#007EA8;
  --coway-pale:#EAF9FD;
  --blue:#00A9E0 !important;
  --blue2:#1DB6E8 !important;
}
.eyebrow,
.hero h1 span,
.stats strong,
.term-big,
.check-list span,
.slide-arrow,
.step span,
.footer-links a:hover{
  color:var(--coway) !important;
}
.btn,
.btn-sm,
.dot.active,
.brand-mark{
  background:var(--coway) !important;
}
.btn:hover{
  background:var(--coway-dark) !important;
}
.btn-ghost{
  color:var(--coway-deep) !important;
  background:#fff !important;
}
.hero{
  background:linear-gradient(180deg,#FCFEFF,#EAF9FD) !important;
}
.visual-card{
  background:linear-gradient(145deg,#E9FAFE,#BFEFFC) !important;
}
.area-pic,
.feature .icon{
  background:#EAF9FD !important;
}
.section-soft{
  background:linear-gradient(180deg,#FAFEFF,#F0FBFE) !important;
}
.section-dark{
  background:linear-gradient(145deg,#006F8F,#0094BD) !important;
}
.cta-card{
  background:linear-gradient(135deg,#00A9E0,#008FBE) !important;
}
.btn-white{
  background:#fff !important;
  color:#008FBE !important;
}
.btn-outline-white{
  color:#fff !important;
  border-color:rgba(255,255,255,.58) !important;
  background:rgba(255,255,255,.05) !important;
}
footer{
  background:#006F8F !important;
}
.product-drop{
  color:#00A9E0 !important;
}
.product-screen{
  background:#006F8F !important;
  color:#8EE0F5 !important;
}
.float-badge{
  color:#007EA8 !important;
}
.nav>a:not(.btn):hover{
  color:#00A9E0 !important;
}