/* ===========================================================
   EPO — 공통 디자인 시스템 (하위 페이지 공유)
   랜딩(index.html)과 동일한 토큰/컴포넌트
   =========================================================== */
:root{
  --bg:#0b0a10; --bg-2:#0e0d15; --bg-3:#08070c;
  --panel:#17151f; --panel-2:#1c1a28; --panel-3:#121119;
  --border:rgba(255,255,255,.07); --border-2:#2a2838; --border-3:#3a3650;
  --accent:#7048e8; --accent-2:#7e5bf2; --accent-soft:#9775fa; --accent-soft2:#b197fc;
  --text:#f4f3f7; --text-2:#d8d5e0; --text-3:#c5c1d4; --text-4:#9a95ac; --text-5:#8c87a0; --text-6:#6e6a7b; --text-7:#5a5470;
  --high:#e0a93b; --mid:#3fbe82; --low:#9a95ac; --red:#ee6666;
  --maxw:1140px; --r:18px;
  font-family:"Pretendard",-apple-system,"Segoe UI",system-ui,sans-serif;
}
*{box-sizing:border-box;margin:0;padding:0;word-break:keep-all;overflow-wrap:break-word}
html{scroll-behavior:smooth}
body{
  background:var(--bg);color:var(--text);line-height:1.6;
  -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;
  overflow-x:hidden;word-break:keep-all;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;
  background:
    radial-gradient(900px 540px at 8% -10%, rgba(112,72,232,.20), transparent 60%),
    radial-gradient(760px 520px at 100% 4%, rgba(151,117,250,.09), transparent 55%),
    radial-gradient(820px 760px at 82% 96%, rgba(112,72,232,.08), transparent 60%);
}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.narrow{max-width:820px}
section{position:relative}

/* 로고 */
.logo{display:inline-flex;align-items:center;font-weight:800;letter-spacing:-.045em;line-height:1;font-size:23px;color:var(--text)}
.logo .mark{width:15px;height:15px;margin-left:2px}
.logo .mark circle.ring{stroke:var(--accent-soft)}
.logo .mark circle.dot{fill:var(--accent-soft)}

/* nav */
nav{position:sticky;top:0;z-index:50;backdrop-filter:saturate(140%) blur(14px);
  background:rgba(11,10,16,.62);border-bottom:1px solid transparent;transition:border-color .25s,background .25s}
nav.scrolled{border-bottom-color:var(--border);background:rgba(11,10,16,.85)}
.nav-in{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-links{display:flex;gap:30px;align-items:center}
.nav-links a{color:var(--text-4);font-size:14.5px;font-weight:500;transition:color .15s}
.nav-links a:hover,.nav-links a.active{color:var(--text)}

/* 버튼 */
.btn{display:inline-flex;align-items:center;gap:9px;justify-content:center;font-weight:600;font-size:15px;
  border-radius:12px;cursor:pointer;padding:12px 20px;border:1px solid transparent;white-space:nowrap;
  transition:transform .12s,box-shadow .2s,background .2s}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(180deg,#7c57ee,#6a40e0);color:#fff;
  box-shadow:0 6px 20px -6px rgba(112,72,232,.7), inset 0 1px 0 rgba(255,255,255,.18)}
.btn-primary:hover{box-shadow:0 10px 30px -8px rgba(112,72,232,.9), inset 0 1px 0 rgba(255,255,255,.25)}
.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--border-3);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.08)}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}
.btn svg{flex:none}

/* 페이지 헤더 */
.page-hero{padding:64px 0 40px;border-bottom:1px solid var(--border)}
.page-hero .eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:13px;font-weight:600;color:var(--text-3);
  background:rgba(112,72,232,.12);border:1px solid rgba(112,72,232,.28);padding:6px 13px;border-radius:999px;margin-bottom:18px}
.page-hero .eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--accent-soft);box-shadow:0 0 0 4px rgba(112,72,232,.18)}
.page-hero h1{font-size:40px;line-height:1.18;letter-spacing:-.035em;font-weight:800;margin-bottom:14px}
.page-hero h1 .grad{background:linear-gradient(100deg,#cdbcff,#9775fa 55%,#7048e8);-webkit-background-clip:text;background-clip:text;color:transparent}
.page-hero p{font-size:16.5px;color:var(--text-4);max-width:62ch}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-5);margin-bottom:22px}
.crumb a:hover{color:var(--text-3)}
.crumb svg{opacity:.6}

.page-body{padding:54px 0 90px}

/* 공지 리스트 */
.filters{display:flex;gap:8px;margin-bottom:26px;flex-wrap:wrap}
.filters button{font-size:13px;font-weight:600;color:var(--text-4);background:rgba(255,255,255,.03);
  border:1px solid var(--border-2);border-radius:999px;padding:7px 15px;cursor:pointer;font-family:inherit;transition:.15s}
.filters button:hover{color:var(--text-2)}
.filters button.on{color:#fff;background:rgba(112,72,232,.18);border-color:rgba(112,72,232,.45)}
.notice-list{border-top:1px solid var(--border)}
.notice-row{display:flex;align-items:center;gap:14px;padding:20px 6px;border-bottom:1px solid var(--border);transition:background .15s}
.notice-row:hover{background:rgba(255,255,255,.018)}
.ntag{font-size:11px;font-weight:700;padding:4px 10px;border-radius:7px;flex:none}
.ntag.imp{color:var(--accent-soft2);background:rgba(112,72,232,.14)}
.ntag.info{color:var(--text-4);background:rgba(255,255,255,.05)}
.ntag.evt{color:var(--mid);background:rgba(63,190,130,.12)}
.notice-row .nt{flex:1;min-width:0}
.notice-row .nt b{font-size:15.5px;font-weight:600;color:var(--text);letter-spacing:-.01em;display:block;line-height:1.4}
.notice-row .nt span{font-size:13px;color:var(--text-5);display:block;margin-top:4px}
.notice-row .nd{font-size:13px;color:var(--text-6);flex:none}
.notice-row .chev{color:var(--text-6);flex:none}

/* 체인지로그 타임라인 */
.timeline{position:relative;padding-left:30px}
.timeline::before{content:"";position:absolute;left:7px;top:8px;bottom:8px;width:2px;background:linear-gradient(180deg,var(--accent),transparent)}
.rel{position:relative;padding-bottom:42px}
.rel::before{content:"";position:absolute;left:-30px;top:6px;width:16px;height:16px;border-radius:50%;
  background:var(--bg);border:3px solid var(--accent);box-shadow:0 0 0 4px rgba(112,72,232,.12)}
.rel.minor::before{border-color:var(--border-3);box-shadow:none}
.rel-head{display:flex;align-items:center;gap:12px;margin-bottom:16px;flex-wrap:wrap}
.rel-ver{font-size:19px;font-weight:800;letter-spacing:-.02em;color:var(--text)}
.rel-ver.cur{color:var(--accent-soft)}
.rel-badge{font-size:11px;font-weight:700;color:#fff;background:linear-gradient(180deg,#7c57ee,#6a40e0);padding:3px 10px;border-radius:999px}
.rel-date{font-size:13px;color:var(--text-6)}
.rel ul{list-style:none;display:flex;flex-direction:column;gap:14px}
.rel li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2);line-height:1.5}
.rel li .tag{flex:none;font-size:11px;font-weight:700;padding:2px 8px;border-radius:6px;margin-top:2px}
.rel li .tag.add{color:var(--mid);background:rgba(63,190,130,.12)}
.rel li .tag.fix{color:var(--high);background:rgba(224,169,59,.12)}
.rel li .tag.imp{color:var(--accent-soft2);background:rgba(112,72,232,.14)}

/* FAQ */
.faq-groups{display:flex;flex-direction:column;gap:40px}
.faq-group h2{font-size:18px;font-weight:800;color:var(--accent-soft);letter-spacing:-.02em;margin-bottom:8px}
.qa{border-bottom:1px solid var(--border)}
.qa button{width:100%;text-align:left;background:none;border:none;color:var(--text);cursor:pointer;
  display:flex;justify-content:space-between;align-items:center;gap:16px;padding:22px 4px;font-size:16.5px;font-weight:600;letter-spacing:-.02em;font-family:inherit}
.qa .ans{max-height:0;overflow:hidden;transition:max-height .3s ease;color:var(--text-3);font-size:15px}
.qa .ans p{padding:0 4px 22px;line-height:1.7}
.qa.open .ans{max-height:420px}
.qa .chev{flex:none;transition:transform .3s;color:var(--text-5)}
.qa.open .chev{transform:rotate(180deg)}

/* 문의 */
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start}
.cinfo{display:flex;flex-direction:column;gap:14px}
.cchan{display:flex;gap:14px;align-items:center;background:var(--panel);border:1px solid var(--border-2);border-radius:14px;padding:18px 20px;transition:.18s}
.cchan:hover{border-color:var(--border-3);transform:translateY(-2px)}
.cchan .ci{width:44px;height:44px;border-radius:12px;flex:none;display:flex;align-items:center;justify-content:center;
  background:rgba(112,72,232,.14);border:1px solid rgba(112,72,232,.26);color:var(--accent-soft)}
.cchan h3{font-size:15px;font-weight:700;margin-bottom:2px}
.cchan p{font-size:13.5px;color:var(--text-4)}
.cchan .go{margin-left:auto;color:var(--text-6)}
.form{background:var(--panel);border:1px solid var(--border-2);border-radius:var(--r);padding:26px 26px 28px}
.form .fld{margin-bottom:16px}
.form label{display:block;font-size:13px;font-weight:600;color:var(--text-3);margin-bottom:7px}
.form input,.form select,.form textarea{width:100%;background:var(--panel-3);border:1px solid var(--border-2);border-radius:10px;
  color:var(--text);font-size:14.5px;font-family:inherit;padding:11px 13px;transition:border-color .15s}
.form input:focus,.form select:focus,.form textarea:focus{outline:none;border-color:var(--accent)}
.form textarea{min-height:130px;resize:vertical;line-height:1.6}
.form .btn{width:100%;margin-top:4px}
.form .hint{font-size:12.5px;color:var(--text-6);margin-top:12px;text-align:center}

/* 가격 */
.prices{display:grid;grid-template-columns:1fr 1fr;gap:22px;max-width:840px;margin:0 auto}
.price{background:var(--panel);border:1px solid var(--border-2);border-radius:var(--r);padding:32px 30px;position:relative}
.price.feat{border-color:rgba(112,72,232,.45);background:linear-gradient(180deg,rgba(112,72,232,.08),var(--panel))}
.price .badge{position:absolute;top:18px;right:18px;font-size:11.5px;font-weight:700;color:#fff;
  background:linear-gradient(180deg,#7c57ee,#6a40e0);padding:4px 11px;border-radius:999px}
.price .pname{font-size:15px;font-weight:700;color:var(--text-2)}
.price .amt{font-size:38px;font-weight:800;letter-spacing:-.03em;margin:10px 0 2px}
.price .amt small{font-size:15px;font-weight:600;color:var(--text-5)}
.price .pnote{font-size:13.5px;color:var(--text-5);min-height:20px}
.price ul{list-style:none;margin:22px 0 26px;display:flex;flex-direction:column;gap:11px}
.price li{display:flex;gap:10px;align-items:flex-start;font-size:14.5px;color:var(--text-2)}
.price li svg{flex:none;margin-top:3px;color:var(--accent-soft)}
.price .btn{width:100%}
.price-note{text-align:center;font-size:13px;color:var(--text-6);margin-top:26px}

/* 약관/정책 본문 */
.prose{font-size:15px;color:var(--text-2);line-height:1.8}
.prose h2{font-size:20px;font-weight:800;color:var(--text);letter-spacing:-.02em;margin:38px 0 12px}
.prose h2:first-child{margin-top:0}
.prose h3{font-size:16px;font-weight:700;color:var(--text);margin:24px 0 8px}
.prose p{margin-bottom:14px}
.prose ul,.prose ol{margin:0 0 16px 20px;display:flex;flex-direction:column;gap:8px}
.prose li{padding-left:2px}
.prose b{color:var(--text)}
.prose .upd{font-size:13.5px;color:var(--text-5);margin-bottom:30px;padding-bottom:18px;border-bottom:1px solid var(--border)}
.prose table{width:100%;border-collapse:collapse;margin:8px 0 18px;font-size:14px}
.prose th,.prose td{border:1px solid var(--border-2);padding:10px 12px;text-align:left;vertical-align:top}
.prose th{background:rgba(255,255,255,.03);font-weight:700;color:var(--text)}
.prose .callout{background:rgba(112,72,232,.07);border:1px solid rgba(112,72,232,.24);border-radius:12px;padding:16px 18px;margin:0 0 18px;color:var(--text-3);font-size:14px}

/* footer */
footer{border-top:1px solid var(--border);padding:54px 0 56px;margin-top:40px}
.foot-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.foot-brand .logo{font-size:21px;margin-bottom:14px}
.foot-brand p{font-size:12.5px;color:var(--text-6);line-height:1.6;max-width:34ch}
.foot-col h4{font-size:12px;font-weight:700;color:var(--text-5);margin-bottom:14px}
.foot-col a{display:block;font-size:13px;color:var(--text-3);padding:5px 0;transition:color .15s}
.foot-col a:hover{color:var(--text)}
.foot-copy{margin-top:40px;padding-top:22px;border-top:1px solid var(--border);font-size:12.5px;color:var(--text-7)}

/* reveal */
.reveal{opacity:0;transform:translateY(16px);transition:opacity .6s ease,transform .6s ease}
.reveal.in{opacity:1;transform:none}

/* 클릭 가능한 릴리스(체인지로그) */
a.rel{color:inherit;cursor:pointer;text-decoration:none;transition:transform .15s}
a.rel:hover{transform:translateX(2px)}
a.rel:hover .rel-ver{color:var(--accent-soft)}

/* 상세(소식/업데이트) 페이지 */
.back-link{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;color:var(--text-5);margin-bottom:20px;transition:color .15s}
.back-link:hover{color:var(--text-2)}
.article-meta{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.article-date{font-size:14px;color:var(--text-5)}
.news-nav{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:48px;padding-top:28px;border-top:1px solid var(--border)}
.news-nav a{display:flex;flex-direction:column;gap:5px;padding:16px 18px;background:var(--panel);border:1px solid var(--border-2);border-radius:14px;transition:.18s;min-width:0}
.news-nav a:hover{border-color:var(--border-3);transform:translateY(-2px)}
.news-nav a.nxt{text-align:right;align-items:flex-end}
.news-nav .nl{font-size:12px;color:var(--text-6)}
.news-nav .nt2{font-size:14px;color:var(--text-2);font-weight:600;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;max-width:100%}
.news-nav a.off{opacity:.35;pointer-events:none}
.notfound{text-align:center;padding:40px 0 20px}
.notfound p{color:var(--text-4);font-size:16px;margin-bottom:22px}

@media(max-width:880px){
  .page-hero h1{font-size:32px}
  .contact-grid,.prices,.foot-grid{grid-template-columns:1fr}
  .foot-grid{gap:26px}
  .nav-links{display:none}
}
@media(max-width:520px){
  .wrap{padding:0 18px}
  .page-hero{padding:44px 0 30px}
  .page-hero h1{font-size:27px}
  .page-body{padding:40px 0 64px}
}