/* AILUX — Day Light / 흰 바탕 위의 지식 네트워크 */
:root{
  --bg:#FFFFFF; --bg2:#F5F9FF; --panel:#FFFFFF;
  --line:#E3EBF5; --navy:#0A2540; --ink:#1E3A5F; --muted:#5B7290;
  --blue:#1D4ED8; --sky:#0EA5E9; --cyan:#22D3EE; --gold:#F5A623;
  --grad:linear-gradient(100deg,#1D4ED8 0%,#0EA5E9 60%,#22D3EE 100%);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Pretendard Variable',Pretendard,-apple-system,'Segoe UI','Malgun Gothic',sans-serif;color:var(--ink);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased;position:relative}
body::after{content:"";position:fixed;inset:0;pointer-events:none;z-index:1;
 background:radial-gradient(110% 70% at 50% 115%,rgba(14,165,233,.10) 0%,transparent 55%),
            radial-gradient(80% 50% at 50% -20%,rgba(29,78,216,.06) 0%,transparent 60%)}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.wrap{max-width:1140px;margin:0 auto;padding:0 24px;position:relative;z-index:2}

/* header */
header{position:sticky;top:0;z-index:50;background:rgba(6,11,26,.94);backdrop-filter:blur(14px);border-bottom:1px solid rgba(137,220,255,.15)}
.nav{display:flex;align-items:center;justify-content:space-between;height:80px}
.nav .logo img{height:42px;width:auto;display:block}
.nav ul{display:flex;gap:32px;list-style:none;align-items:center}
.nav ul a{font-size:15px;font-weight:500;color:#AFC3E0;transition:color .2s;padding:6px 0}
.nav ul a:hover{color:#FFFFFF}
.nav ul a.on{color:#7CC8FF;border-bottom:2px solid #7CC8FF}
.nav .cta{background:var(--grad);color:#fff;padding:10px 22px;border-radius:99px;font-weight:700;font-size:14px;box-shadow:0 4px 16px rgba(29,78,216,.28);transition:transform .2s}
.nav .cta:hover{transform:translateY(-1px);border:none;color:#fff}
.menu-btn{display:none;background:none;border:none;font-size:26px;color:#7CC8FF;cursor:pointer}

/* hero */
.hero{position:relative;overflow:hidden;padding:140px 0 120px;text-align:center;
 background:radial-gradient(120% 100% at 50% 120%,rgba(64,140,255,.28) 0%,rgba(18,42,92,.35) 32%,transparent 60%),
            radial-gradient(90% 70% at 20% -10%,rgba(30,80,180,.25) 0%,transparent 55%),
            linear-gradient(160deg,#04060F 0%,#071026 55%,#0A1832 100%)}
.hero::after{content:"";position:absolute;left:0;right:0;bottom:0;height:120px;background:linear-gradient(180deg,transparent,rgba(255,255,255,1));z-index:1;pointer-events:none}
#net{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero .in{position:relative;z-index:2}
.hero .badges{display:flex;gap:10px;justify-content:center;flex-wrap:wrap;margin-bottom:30px}
.badge{font-size:13px;font-weight:600;color:#FFEBC0;background:rgba(255,180,77,.10);border:1px solid rgba(255,180,77,.35);padding:6px 16px;border-radius:99px;backdrop-filter:blur(4px)}
.badge.b{color:#9FE0FF;background:rgba(137,220,255,.10);border-color:rgba(137,220,255,.35)}
.hero h1{font-size:clamp(32px,5vw,58px);font-weight:800;letter-spacing:-.03em;line-height:1.28;color:#fff;text-shadow:0 0 46px rgba(255,196,77,.28),0 2px 18px rgba(0,0,0,.5)}
.hero h1 .g{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{max-width:660px;margin:26px auto 0;font-size:clamp(16px,2vw,19px);color:#BFD0E8;text-shadow:0 1px 12px rgba(0,0,0,.6)}
.hero .actions{margin-top:44px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn{display:inline-block;padding:15px 34px;border-radius:99px;font-weight:700;font-size:16px;transition:all .2s}
.btn.primary{background:var(--grad);color:#fff;box-shadow:0 8px 26px rgba(29,78,216,.3)}
.btn.primary:hover{transform:translateY(-2px);box-shadow:0 12px 32px rgba(29,78,216,.38)}
.btn.ghost{border:1.5px solid rgba(137,220,255,.45);color:#9FE0FF}
.btn.ghost:hover{background:rgba(137,220,255,.08)}

/* sections */
section{padding:92px 0;position:relative;z-index:2}
section.alt{background:var(--bg2)}
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--sky);text-transform:uppercase;margin-bottom:14px}
h2.title{font-size:clamp(26px,3.4vw,38px);font-weight:800;letter-spacing:-.02em;color:var(--navy);line-height:1.35}
p.lead{color:var(--muted);margin-top:16px;max-width:680px;font-size:17px}
.center{text-align:center}.center p.lead{margin-left:auto;margin-right:auto}

/* cards */
.grid{display:grid;gap:22px;margin-top:52px}
.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:34px 30px;transition:all .25s}
.card:hover{transform:translateY(-4px);border-color:#BFD7F5;box-shadow:0 18px 44px rgba(10,37,64,.10)}
.card .ic{width:52px;height:52px;border-radius:50%;background:radial-gradient(circle at 35% 35%,rgba(34,211,238,.18),rgba(29,78,216,.08) 60%,transparent);border:1px solid rgba(29,78,216,.22);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:20px}
.card h3{font-size:19px;font-weight:700;color:var(--navy);margin-bottom:10px}
.card p{font-size:15px;color:var(--muted)}
.card .more{display:inline-block;margin-top:16px;font-size:14px;font-weight:600;color:var(--blue)}

/* stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:52px}
.stat{background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:30px 24px;text-align:center}
.stat .num{font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:-.02em}
.stat .lbl{margin-top:8px;font-size:13.5px;color:var(--muted);line-height:1.55}

/* steps */
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;margin-top:52px}
.step{position:relative;background:var(--panel);border:1px solid var(--line);border-radius:20px;padding:30px 24px}
.step::before{content:"";position:absolute;top:30px;left:-20px;width:20px;height:1.5px;background:linear-gradient(90deg,transparent,rgba(29,78,216,.4))}
.step:first-child::before{display:none}
.step .no{font-size:12.5px;font-weight:800;color:var(--sky);letter-spacing:.14em}
.step h3{font-size:18px;font-weight:700;color:var(--navy);margin:8px 0 8px}
.step p{font-size:14px;color:var(--muted)}

/* table */
.tbl{width:100%;border-collapse:collapse;margin-top:40px;background:#fff;border-radius:16px;overflow:hidden;border:1px solid var(--line);font-size:15px}
.tbl th{background:#F2F7FF;color:var(--navy);font-weight:700;padding:14px 18px;text-align:left;border-bottom:1px solid var(--line)}
.tbl td{padding:14px 18px;border-bottom:1px solid var(--line);color:var(--ink)}
.tbl td.x{color:#A9BAD0}
.tbl tr:last-child td{border-bottom:none}
.tbl td strong{color:var(--blue)}

/* checks */
.checks{list-style:none;margin-top:24px}
.checks li{padding-left:34px;position:relative;margin-bottom:15px;color:var(--ink);font-size:15.5px}
.checks li::before{content:"";position:absolute;left:4px;top:9px;width:9px;height:9px;border-radius:50%;background:var(--sky);box-shadow:0 0 0 4px rgba(14,165,233,.15)}
.checks li b{color:var(--navy)}

.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;margin-top:20px}

/* cta band — 여기만 밤하늘 유지 */
.band{position:relative;overflow:hidden;background:radial-gradient(140% 160% at 50% 130%,rgba(64,140,255,.35) 0%,rgba(16,44,96,.6) 40%,#0A1B36 75%),#081226;border-radius:28px;padding:72px 60px;text-align:center;color:#fff}
.band::before{content:"";position:absolute;inset:0;
 background-image:radial-gradient(2px 2px at 15% 30%,rgba(255,201,77,.9),transparent 60%),radial-gradient(1.5px 1.5px at 35% 60%,rgba(137,220,255,.8),transparent 60%),radial-gradient(2px 2px at 55% 25%,rgba(255,180,77,.8),transparent 60%),radial-gradient(1.6px 1.6px at 75% 55%,rgba(203,217,242,.85),transparent 60%),radial-gradient(2.2px 2.2px at 90% 30%,rgba(255,196,77,.85),transparent 60%)}
.band h2{position:relative;font-size:clamp(24px,3vw,34px);font-weight:800;letter-spacing:-.02em}
.band p{position:relative;color:#B9D2F0;margin-top:14px;font-size:16px}
.band .btn.primary{position:relative;margin-top:32px;background:#fff;color:var(--blue);box-shadow:none}

/* form */
.form{background:#fff;border:1px solid var(--line);border-radius:24px;padding:44px;max-width:720px;margin:52px auto 0;box-shadow:0 12px 40px rgba(10,37,64,.06)}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form label{display:block;font-size:14px;font-weight:600;color:var(--navy);margin:18px 0 8px}
.form input,.form select,.form textarea{width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:12px;font-size:15px;font-family:inherit;color:var(--ink);background:#FBFDFF;transition:border .2s}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--blue)}
.form button{margin-top:28px;width:100%;padding:16px;border:none;border-radius:99px;background:var(--grad);color:#fff;font-size:16px;font-weight:800;cursor:pointer;box-shadow:0 8px 26px rgba(29,78,216,.28)}

/* chips */
.chips{display:flex;gap:14px;flex-wrap:wrap;margin-top:28px;justify-content:center}
.chip{background:#fff;border:1px solid var(--line);border-radius:16px;padding:18px 26px;font-size:15px;color:var(--ink)}
.chip b{color:var(--blue)}
.chip a{color:var(--blue)}

/* footer — 밤의 지구로 마무리 */
footer{background:#081226;color:#9FB6D4;padding:56px 0 40px;margin-top:40px;position:relative;z-index:2;overflow:hidden}
footer::before{content:"";position:absolute;inset:0;
 background-image:radial-gradient(1.8px 1.8px at 10% 25%,rgba(255,201,77,.7),transparent 60%),radial-gradient(1.4px 1.4px at 30% 70%,rgba(137,220,255,.6),transparent 60%),radial-gradient(1.8px 1.8px at 62% 30%,rgba(255,180,77,.55),transparent 60%),radial-gradient(1.5px 1.5px at 85% 65%,rgba(203,217,242,.6),transparent 60%)}
footer .wrap{position:relative}
footer .cols{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px}
footer .logo svg{height:30px}
footer h4{color:#fff;font-size:13px;font-weight:700;margin-bottom:14px;letter-spacing:.14em}
footer a{display:block;font-size:14px;margin-bottom:10px;color:#9FB6D4}
footer a:hover{color:#fff}
footer p{font-size:14px;line-height:1.8}
footer .base{border-top:1px solid rgba(255,255,255,.12);margin-top:40px;padding-top:24px;font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* 서브페이지 히어로 */
.phero{position:relative;padding:100px 0 64px;border-bottom:1px solid var(--line);overflow:hidden;background:linear-gradient(180deg,#FBFDFF,#F2F8FF)}
.phero::before{content:"";position:absolute;inset:0;
 background-image:radial-gradient(2px 2px at 12% 30%,rgba(29,78,216,.35),transparent 60%),radial-gradient(1.6px 1.6px at 28% 68%,rgba(14,165,233,.3),transparent 60%),radial-gradient(1.4px 1.4px at 44% 22%,rgba(34,211,238,.35),transparent 60%),radial-gradient(2px 2px at 60% 58%,rgba(29,78,216,.28),transparent 60%),radial-gradient(1.5px 1.5px at 73% 30%,rgba(14,165,233,.32),transparent 60%),radial-gradient(2.2px 2.2px at 86% 64%,rgba(245,166,35,.35),transparent 60%),radial-gradient(1.3px 1.3px at 93% 25%,rgba(34,211,238,.3),transparent 60%)}
.phero h1{font-size:clamp(30px,4vw,44px);font-weight:800;color:var(--navy);letter-spacing:-.02em;position:relative}
.phero p{color:var(--muted);margin-top:16px;max-width:660px;font-size:17px;position:relative}

@media(max-width:960px){
  .g3,.g4,.stats,.steps{grid-template-columns:repeat(2,1fr)}
  .split,.g2,footer .cols{grid-template-columns:1fr}
  .nav ul{display:none;position:absolute;top:80px;left:0;right:0;background:rgba(6,11,26,.98);flex-direction:column;padding:20px;gap:18px;border-bottom:1px solid rgba(137,220,255,.15)}
  .nav ul.open{display:flex}
  .menu-btn{display:block}
  .band{padding:50px 28px}
  .form{padding:28px 22px}.form .row{grid-template-columns:1fr}
  .step::before{display:none}
}
@media(max-width:560px){.g3,.g4,.stats,.steps{grid-template-columns:1fr}}

/* ── 인트로 오버레이 ── */
#intro{position:fixed;inset:0;z-index:999;background:radial-gradient(120% 90% at 50% 115%,rgba(40,90,190,.25) 0%,transparent 55%),#050B1D;cursor:pointer}
#ic{position:absolute;inset:0;width:100%;height:100%}
#intro .ilogo{position:absolute;left:50%;top:44%;transform:translate(-50%,-50%);text-align:center;pointer-events:none}
#imark{width:min(300px,52vw);display:block;margin:0 auto;animation:mkin 1.2s ease both;filter:drop-shadow(0 0 30px rgba(120,210,255,.25))}
@keyframes mkin{from{opacity:0;transform:scale(.85)}to{opacity:1;transform:scale(1)}}
#iword{width:min(420px,70vw);display:block;margin:34px auto 0;opacity:0;transform:translateY(14px);transition:opacity 1s,transform 1s}
#iword.on{opacity:1;transform:translateY(0)}
#itag{margin-top:18px;font-size:clamp(11px,1.6vw,14px);letter-spacing:.42em;color:#8FA6C8;opacity:0;transition:opacity 1.2s}
#itag.on{opacity:1}
#skip{position:absolute;top:24px;right:28px;z-index:2;background:rgba(255,255,255,.06);border:1px solid rgba(159,224,255,.3);color:#AFC6E4;font-size:13px;padding:8px 18px;border-radius:99px;cursor:pointer;transition:all .2s}
#skip:hover{background:rgba(255,255,255,.12);color:#fff}