/* 시안 4 — TECH NEON: Stripe/Linear */
:root{
  --ink:#e6e9f0;
  --bg:#0a0e1a;
  --bg-2:#0f1424;
  --panel:#131a2e;
  --line:rgba(255,255,255,.08);
  --line-2:rgba(255,255,255,.14);
  --primary:#3b82f6;
  --cyan:#06d6e1;
  --purple:#7c5cff;
  --muted:#8a93a8;
}
body{background:var(--bg); color:var(--ink); font-family:'Inter','Pretendard Variable',system-ui,sans-serif;
  background-image:
    radial-gradient(1100px 600px at 80% -8%, rgba(59,130,246,.18), transparent 60%),
    radial-gradient(800px 500px at 0% 100%, rgba(124,92,255,.10), transparent 60%);
  background-attachment: fixed;
}
.os-kakao-fab{background:linear-gradient(135deg,var(--primary),var(--cyan)); color:#fff}
.os-kakao-fab:hover{box-shadow:0 12px 32px -8px rgba(59,130,246,.5)}

.tn-nav{position:sticky; top:0; z-index:40; padding:14px 0; backdrop-filter:blur(14px); background:rgba(10,14,26,.7); border-bottom:1px solid var(--line)}
.tn-nav__inner{display:flex; align-items:center; justify-content:space-between}
.tn-nav__brand{display:flex; align-items:center; gap:10px; font-weight:700; letter-spacing:-.02em; font-size:16px}
.tn-nav__brand-mark{width:26px; height:26px; border-radius:8px; background:linear-gradient(135deg,var(--primary),var(--cyan)); display:grid; place-items:center; font-size:14px}
.tn-nav__menu{display:flex; gap:28px; font-size:13px; color:var(--muted)}
.tn-nav__menu a:hover, .tn-nav__menu a.active{color:#fff}
.tn-nav__cta{padding:9px 18px; border-radius:8px; background:linear-gradient(135deg,var(--primary),var(--cyan)); color:#fff; font-weight:600; font-size:13px}
.tn-nav__cta:hover{box-shadow:0 8px 24px -6px rgba(59,130,246,.5)}
@media(max-width:720px){.tn-nav__menu{display:none}}

/* hero */
.tn-hero{padding:120px 0 80px; text-align:center; position:relative; overflow:hidden}
.tn-hero::before{content:""; position:absolute; left:50%; top:-20px; transform:translateX(-50%); width:720px; height:720px; background:radial-gradient(circle, rgba(59,130,246,.18) 0, transparent 60%); pointer-events:none}
.tn-eyebrow{display:inline-flex; align-items:center; gap:10px; padding:6px 14px; border:1px solid var(--line-2); border-radius:999px; font-family:ui-monospace,monospace; font-size:11px; color:var(--cyan); letter-spacing:.16em; text-transform:uppercase; background:rgba(255,255,255,.03)}
.tn-eyebrow::before{content:""; width:6px; height:6px; background:var(--cyan); border-radius:50%; box-shadow:0 0 8px var(--cyan)}
.tn-hero h1{font-size:clamp(44px,8vw,96px); font-weight:800; letter-spacing:-.04em; line-height:1; margin:24px 0 16px; background:linear-gradient(180deg,#fff 30%, #8a93a8 90%); -webkit-background-clip:text; background-clip:text; color:transparent}
.tn-hero h1 span{background:linear-gradient(90deg,var(--primary),var(--cyan)); -webkit-background-clip:text; background-clip:text; color:transparent}
.tn-hero__lead{max-width:600px; margin:0 auto 36px; color:var(--muted); font-size:17px; line-height:1.6}
.tn-hero__cta{display:flex; gap:12px; justify-content:center; flex-wrap:wrap}
.tn-btn{display:inline-flex; align-items:center; gap:10px; padding:14px 28px; border-radius:10px; font-weight:600; font-size:15px}
.tn-btn--primary{background:linear-gradient(135deg,var(--primary),var(--cyan)); color:#fff}
.tn-btn--primary:hover{box-shadow:0 12px 28px -10px rgba(59,130,246,.6); transform:translateY(-1px)}
.tn-btn--ghost{border:1px solid var(--line-2); color:#fff; background:rgba(255,255,255,.03)}
.tn-btn--ghost:hover{background:rgba(255,255,255,.07)}

/* live data strip */
.tn-data-strip{display:grid; grid-template-columns:repeat(4,1fr); gap:14px; margin-top:60px; padding:24px; background:var(--panel); border:1px solid var(--line); border-radius:18px}
.tn-data-strip__item{display:flex; flex-direction:column; gap:4px; padding:14px; border-right:1px solid var(--line)}
.tn-data-strip__item:last-child{border-right:0}
.tn-data-strip__label{font-family:ui-monospace,monospace; font-size:10px; letter-spacing:.16em; color:var(--muted); text-transform:uppercase}
.tn-data-strip__value{font-family:ui-monospace,monospace; font-size:24px; font-weight:700; color:#fff; letter-spacing:-.02em}
.tn-data-strip__value span{font-size:12px; color:var(--cyan); margin-left:4px}
.tn-data-strip__bar{height:4px; background:rgba(255,255,255,.08); border-radius:2px; overflow:hidden; margin-top:6px}
.tn-data-strip__bar > i{display:block; height:100%; background:linear-gradient(90deg,var(--primary),var(--cyan))}
@media(max-width:760px){.tn-data-strip{grid-template-columns:repeat(2,1fr)} .tn-data-strip__item:nth-child(2){border-right:0}}

/* sections */
.tn-sec{padding:96px 0}
.tn-sec__head{margin-bottom:48px; text-align:center}
.tn-sec__idx{font-family:ui-monospace,monospace; font-size:11px; letter-spacing:.18em; color:var(--cyan); text-transform:uppercase}
.tn-sec__title{font-size:clamp(30px,4vw,48px); font-weight:800; letter-spacing:-.03em; margin:6px 0 12px; color:#fff}
.tn-sec__lead{color:var(--muted); max-width:600px; margin:0 auto}

/* services — tech cards */
.tn-svc{display:grid; grid-template-columns:repeat(auto-fit,minmax(280px,1fr)); gap:14px}
.tn-svc__card{background:var(--panel); border:1px solid var(--line); border-radius:18px; padding:24px; display:flex; flex-direction:column; gap:14px; position:relative; overflow:hidden; transition:border-color .2s, transform .2s}
.tn-svc__card:hover{border-color:var(--primary); transform:translateY(-3px)}
.tn-svc__card::before{content:""; position:absolute; top:-1px; left:24px; right:24px; height:1px; background:linear-gradient(90deg, transparent, var(--primary), transparent); opacity:0; transition:opacity .2s}
.tn-svc__card:hover::before{opacity:1}
.tn-svc__head{display:flex; gap:12px; align-items:flex-start}
.tn-svc__icon{width:42px; height:42px; border-radius:10px; background:linear-gradient(135deg, rgba(59,130,246,.2), rgba(6,214,225,.1)); border:1px solid var(--line-2); display:grid; place-items:center; flex:0 0 auto; font-family:ui-monospace,monospace; color:var(--cyan); font-size:14px; font-weight:700}
.tn-svc__name{font-size:17px; font-weight:700; line-height:1.3; color:#fff; margin:0}
.tn-svc__sub{font-family:ui-monospace,monospace; font-size:10px; letter-spacing:.14em; color:var(--cyan); text-transform:uppercase; margin-top:2px}
.tn-svc__sum{color:var(--muted); font-size:14px; line-height:1.6}
.tn-svc__list{display:flex; flex-direction:column; gap:6px}
.tn-svc__list li{display:flex; gap:8px; font-size:13px; color:#c0c8db; align-items:center}
.tn-svc__list li::before{content:"›"; color:var(--cyan); font-weight:700}
.tn-svc__foot{margin-top:auto; padding-top:14px; border-top:1px solid var(--line); display:flex; justify-content:space-between; align-items:center}
.tn-svc__price{font-family:ui-monospace,monospace; font-size:11px; color:var(--muted)}
.tn-svc__cta{font-size:13px; color:var(--cyan); font-weight:600}
.tn-svc__cta:hover{color:#fff}

/* process — pipeline */
.tn-proc{display:grid; grid-template-columns:repeat(6,1fr); gap:0; position:relative}
.tn-proc::before{content:""; position:absolute; top:30px; left:5%; right:5%; height:1px; background:linear-gradient(90deg, transparent, var(--cyan), transparent)}
.tn-proc__step{padding:12px 14px; text-align:center; position:relative}
.tn-proc__no{width:60px; height:60px; margin:0 auto 14px; border-radius:50%; background:var(--panel); border:1px solid var(--line-2); display:grid; place-items:center; font-family:ui-monospace,monospace; font-weight:700; font-size:18px; color:#fff; position:relative; z-index:1}
.tn-proc__step:hover .tn-proc__no{border-color:var(--cyan); box-shadow:0 0 24px rgba(6,214,225,.4)}
.tn-proc__title{font-weight:700; font-size:14px; color:#fff}
.tn-proc__desc{color:var(--muted); font-size:12px; margin-top:6px; line-height:1.5}
@media(max-width:880px){.tn-proc{grid-template-columns:repeat(3,1fr); gap:24px 0} .tn-proc::before{display:none}}
@media(max-width:520px){.tn-proc{grid-template-columns:repeat(2,1fr)}}

/* guarantee */
.tn-guard{display:grid; grid-template-columns:repeat(4,1fr); gap:14px}
.tn-guard__card{background:var(--panel); border:1px solid var(--line); border-radius:14px; padding:22px; display:flex; flex-direction:column; gap:8px}
.tn-guard__icon{width:36px; height:36px; border-radius:10px; background:linear-gradient(135deg,var(--primary),var(--cyan)); display:grid; place-items:center; color:#fff; font-weight:900}
.tn-guard__title{font-weight:700; font-size:15px; color:#fff}
.tn-guard__desc{color:var(--muted); font-size:13px; line-height:1.6}
@media(max-width:760px){.tn-guard{grid-template-columns:repeat(2,1fr)}}

/* faq */
.tn-faq{display:flex; flex-direction:column; gap:10px; max-width:780px; margin:0 auto}
.tn-faq details{background:var(--panel); border:1px solid var(--line); border-radius:12px; padding:16px 20px}
.tn-faq details:hover{border-color:var(--line-2)}
.tn-faq summary{cursor:pointer; list-style:none; display:flex; gap:14px; align-items:center; font-weight:600; color:#fff}
.tn-faq summary::before{content:"▸"; color:var(--cyan); transition:transform .2s}
.tn-faq details[open] summary::before{transform:rotate(90deg)}
.tn-faq__a{color:var(--muted); font-size:14px; margin:10px 0 0 22px; line-height:1.7}

/* form */
.tn-form{display:grid; grid-template-columns:repeat(2,1fr); gap:14px; background:var(--panel); border:1px solid var(--line); border-radius:18px; padding:32px}
.tn-form label{display:flex; flex-direction:column; gap:6px; font-family:ui-monospace,monospace; font-size:10px; letter-spacing:.16em; color:var(--muted); text-transform:uppercase}
.tn-form .full{grid-column:1/-1}
.tn-form input, .tn-form select, .tn-form textarea{
  background:var(--bg-2); border:1px solid var(--line-2); border-radius:10px; padding:12px 14px;
  color:#fff; font-size:14px; font-family:inherit; outline:none; letter-spacing:0; text-transform:none;
}
.tn-form input:focus, .tn-form select:focus, .tn-form textarea:focus{border-color:var(--cyan); box-shadow:0 0 0 3px rgba(6,214,225,.18)}
.tn-form button{grid-column:1/-1; padding:16px; background:linear-gradient(135deg,var(--primary),var(--cyan)); color:#fff; border-radius:10px; font-weight:700; font-size:15px}
@media(max-width:680px){.tn-form{grid-template-columns:1fr}}

/* footer */
.tn-footer{padding:60px 0 100px; border-top:1px solid var(--line); margin-top:60px}
.tn-footer .os-container{display:grid; grid-template-columns:2fr 1fr 1fr; gap:32px}
.tn-footer h4{font-size:11px; letter-spacing:.16em; color:#fff; text-transform:uppercase; margin:0 0 12px}
.tn-footer__brand{font-weight:800; font-size:24px; background:linear-gradient(135deg,var(--primary),var(--cyan)); -webkit-background-clip:text; background-clip:text; color:transparent}
.tn-footer p{margin:6px 0; color:var(--muted); font-size:13px}
.tn-footer a{color:var(--muted)}
.tn-footer a:hover{color:#fff}
.tn-footer__qr{display:flex; gap:14px; align-items:center; margin-top:14px}
.tn-footer__qr img{width:88px; height:88px; padding:6px; background:#fff; border-radius:8px}
.tn-footer__copy{grid-column:1/-1; padding-top:18px; border-top:1px solid var(--line); color:var(--muted); font-size:12px; margin-top:24px; font-family:ui-monospace,monospace}
@media(max-width:760px){.tn-footer .os-container{grid-template-columns:1fr}}

.tn-page-hero{padding:80px 0 40px}
.tn-page-hero h1{font-size:clamp(36px,5vw,60px); font-weight:800; margin:8px 0 12px; color:#fff; letter-spacing:-.03em}