:root{
  --bg:#080b0d; --bg2:#10161a; --card:#121a1f; --card2:#172228;
  --text:#eef3f6; --muted:#aab4bb; --gold:#f4cc69; --gold2:#b88732;
  --line:rgba(244,204,105,.28); --danger:#ff7979; --green:#65e6b9;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Apple SD Gothic Neo","Noto Sans KR","Segoe UI",sans-serif;
  background:
    radial-gradient(circle at 50% -10%, rgba(244,204,105,.12), transparent 38rem),
    repeating-linear-gradient(90deg, rgba(255,255,255,.026) 0 1px, transparent 1px 4px),
    linear-gradient(180deg,#151b20 0%,#080b0d 70%);
  line-height:1.65;
}
a{color:inherit;text-decoration-skip-ink:auto}
a:hover{color:var(--gold)}
.nav{
  position:sticky;top:0;z-index:50;display:flex;flex-wrap:wrap;align-items:flex-start;
  padding:14px min(5vw,54px) calc(14px + env(safe-area-inset-top));
  background:rgba(8,11,13,.84);backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line)
}
.nav-top{display:flex;flex:1;justify-content:space-between;align-items:center;gap:16px;min-width:0}
.nav-toggle{position:absolute;opacity:0;pointer-events:none;width:0;height:0}
.nav-menu-btn{display:none}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;font-weight:1000}
.brand img{width:36px;height:36px;border-radius:10px}
.brand span{color:var(--gold)}
.nav-links{display:flex;gap:18px;align-items:center;margin-left:auto}
.nav-links a{text-decoration:none;color:var(--muted);font-size:14px;font-weight:900}
.nav-links a:hover{color:var(--gold)}
.container{width:min(1120px,100%);margin:0 auto;padding:0 20px}
.hero{min-height:86vh;display:grid;place-items:center;padding:54px 0}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:48px;align-items:center}
.badge{display:inline-flex;border:1px solid var(--line);background:rgba(244,204,105,.08);color:var(--gold);border-radius:999px;padding:8px 14px;font-size:14px;font-weight:1000;margin-bottom:18px}
h1{font-size:clamp(44px,7vw,92px);line-height:.98;letter-spacing:-.06em;margin:0 0 22px}
.metal{background:linear-gradient(180deg,#fff 0%,#a7adb1 42%,#fff 55%,#646b70 100%);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:clamp(18px,2.1vw,23px);color:#d3d9dd;word-break:keep-all;max-width:760px}
.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-height:52px;padding:0 22px;border-radius:14px;text-decoration:none;font-weight:1000;border:1px solid var(--line)}
.btn.primary{background:linear-gradient(180deg,#ffe8a7,#c99732);color:#111;box-shadow:0 0 26px rgba(244,204,105,.28)}
.btn.ghost{background:rgba(255,255,255,.055)}
.device{border:1px solid var(--line);border-radius:34px;padding:18px;background:linear-gradient(145deg,rgba(255,255,255,.08),rgba(255,255,255,.02));box-shadow:0 24px 80px rgba(0,0,0,.46)}
.device img{width:100%;display:block;border-radius:24px}
.section{padding:86px 0;border-top:1px solid rgba(244,204,105,.10)}
.section h2{font-size:clamp(32px,4.2vw,54px);line-height:1.1;letter-spacing:-.045em;margin:0 0 14px}
.section-sub{color:var(--muted);font-size:18px;word-break:keep-all}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:32px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-top:32px}
.card{background:rgba(18,26,31,.88);border:1px solid var(--line);border-radius:22px;padding:24px;box-shadow:0 18px 48px rgba(0,0,0,.22)}
.card h3{margin:0 0 10px;color:var(--gold);font-size:22px}
.card p{margin:0;color:#d2d9dd;word-break:keep-all}
.split{display:grid;grid-template-columns:.95fr 1.05fr;gap:42px;align-items:center}
.split img{width:100%;border-radius:26px;border:1px solid var(--line);box-shadow:0 20px 64px rgba(0,0,0,.36)}
.footer{padding:46px 20px;text-align:center;color:var(--muted);border-top:1px solid var(--line)}
.footer strong{color:var(--text)}
.footer-links{margin-top:14px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.footer-links a{color:var(--muted);font-weight:800;text-decoration:none}
.page{padding:70px 0 90px}
.prose{max-width:860px;margin:0 auto}
.prose h1{font-size:clamp(38px,5vw,62px)}
.prose h2{font-size:28px;margin-top:42px;color:var(--gold)}
.prose p,.prose li{color:#d5dde1;word-break:keep-all}
.notice{border:1px solid rgba(255,121,121,.45);background:rgba(255,121,121,.10);color:#ffe0e0;border-radius:18px;padding:18px 20px;font-weight:800;margin:22px 0}
.ok{border:1px solid rgba(101,230,185,.36);background:rgba(101,230,185,.08);border-radius:18px;padding:18px 20px;margin:22px 0}
.parts{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:22px}
.part{padding:14px 16px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);font-weight:900}
.steps{display:grid;gap:18px;margin-top:28px}
.step{display:grid;grid-template-columns:64px 1fr;gap:18px;background:rgba(18,26,31,.90);border:1px solid var(--line);border-radius:22px;padding:22px}
.num{width:54px;height:54px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(180deg,#ffe8a7,#c99732);color:#111;font-size:22px;font-weight:1000}
.gallery{display:grid;grid-template-columns:repeat(2,1fr);gap:14px;margin-top:24px}
.gallery img{width:100%;border-radius:18px;border:1px solid var(--line);background:#000}
.gallery3{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:24px}
.gallery3 img{width:100%;border-radius:18px;border:1px solid var(--line);background:#000;aspect-ratio:4/3;object-fit:cover}
.slide-row{display:grid;grid-template-columns:1fr auto 1fr;gap:20px;align-items:center;margin-top:28px}
.slide-row img{width:100%;border-radius:18px;border:1px solid var(--line);background:#000}
.slide-arrow{color:var(--gold);font-size:clamp(24px,4vw,36px);font-weight:1000;text-align:center;line-height:1.2}
.fig-cap{text-align:center;color:var(--muted);margin-top:16px;font-weight:800;word-break:keep-all}
.figure-full{margin-top:28px}
.figure-full img{width:100%;border-radius:18px;border:1px solid var(--line);background:#000}
.container-wide{width:min(1360px,100%);margin:0 auto;padding:0 20px}
.figure-key{margin-top:32px;padding:20px;border-radius:24px;border:2px solid var(--line);background:rgba(18,26,31,.92);box-shadow:0 24px 80px rgba(0,0,0,.38)}
.figure-key img{width:100%;display:block;border-radius:16px;border:1px solid rgba(255,255,255,.08);background:#000}
.split-card{display:grid;grid-template-columns:1fr 1fr;gap:28px;margin-top:28px;align-items:start}
.split-card img{width:100%;border-radius:18px;border:1px solid var(--line)}
.pin-list{display:grid;gap:10px;margin-top:18px}
.pin{padding:12px 16px;border-radius:14px;background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);font-weight:800;color:#d2d9dd}
.pin strong{color:var(--gold)}
.table{width:100%;border-collapse:collapse;margin-top:20px;background:rgba(18,26,31,.8);border-radius:16px;overflow:hidden;display:block;overflow-x:auto;-webkit-overflow-scrolling:touch}
.table th,.table td{border-bottom:1px solid rgba(255,255,255,.08);padding:14px;text-align:left;color:#d7dee2;white-space:nowrap}
.table th{color:var(--gold)}
.prose a{color:var(--gold);font-weight:800}
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;margin-top:20px;border-radius:16px}
.table-wrap .table{display:table;white-space:normal}
.table-wrap .table th,.table-wrap .table td{white-space:normal;min-width:120px}
.card{text-decoration:none;transition:border-color .2s,transform .2s}
a.card:hover{border-color:var(--gold);transform:translateY(-2px)}
@media(max-width:920px){
  .nav-top{width:100%}
  .nav-links{margin-left:0;width:100%}
  .nav-menu-btn{
    display:inline-flex;align-items:center;justify-content:center;min-height:44px;min-width:64px;
    padding:0 14px;border-radius:12px;border:1px solid var(--line);background:rgba(255,255,255,.06);
    color:var(--gold);font-weight:1000;font-size:14px;cursor:pointer;user-select:none
  }
  .nav-links{
    display:none;width:100%;flex-direction:column;gap:4px;padding-top:12px;margin-top:12px;
    border-top:1px solid rgba(244,204,105,.12)
  }
  .nav-links a{
    display:flex;align-items:center;min-height:48px;padding:0 12px;border-radius:12px;
    color:var(--text);font-size:16px
  }
  .nav-links a:hover{background:rgba(244,204,105,.08);color:var(--gold)}
  .nav-toggle:checked ~ .nav-links{display:flex}
  .hero-grid,.split,.split-card{grid-template-columns:1fr}
  .grid{grid-template-columns:repeat(2,1fr)}
  .grid3,.parts,.gallery,.gallery3{grid-template-columns:1fr}
  .slide-row{grid-template-columns:1fr}
  .slide-arrow{transform:rotate(90deg);padding:8px 0}
  .hero{min-height:auto;padding:40px 0 54px}
  .device{max-width:min(340px,100%);margin:auto}
  .section{padding:64px 0}
  .container-wide{padding:0 16px}
  .figure-key{padding:12px}
  .page{padding:48px 0 72px}
}
@media(max-width:540px){
  .grid{grid-template-columns:1fr}
  .step{grid-template-columns:1fr}
  .container,.container-wide{padding:0 16px}
  .hero{padding:32px 0 48px}
  h1{font-size:clamp(36px,10vw,56px)}
  .lead{font-size:17px}
  .btn{width:100%}
  .actions{flex-direction:column}
  .footer{padding:36px 16px calc(36px + env(safe-area-inset-bottom))}
  .parts{grid-template-columns:1fr}
}