:root{
  --primary:#EF4823;--primary-hover:#D63D1A;--primary-border:#F48749;
  --accent:#FFF5F2;--primary-soft:#FEF1EA;
  --fg:#1A1A2E;--b02:#555656;--muted:#6B7280;--b03:#ABABAB;
  --bg:#fff;--soft:#F5F5F5;--gray50:#F9FAFB;--b06:#EAECF0;
  --border:#E5E7EB;
  --danger:#DC2626;--danger-soft:#FEF2F2;--danger-border:#FECACA;
  --success:#16A34A;--success-soft:#F0FDF4;--success-border:#BBF7D0;
  --info:#006ADC;--info-soft:#EEFCFA;
  --navy:linear-gradient(to bottom right,#0B1F3A,#123A63,#0B1F3A);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:88px}
body{margin:0;font-family:Pretendard Variable,Pretendard,Inter,system-ui,sans-serif;color:var(--fg);background:var(--bg);font-size:16px;line-height:25px;word-break:keep-all;overflow-wrap:break-word}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.wrap{max-width:1200px;margin:0 auto;padding:0 24px}

/* header */
header.top{position:sticky;top:0;z-index:20;background:#fff;border-bottom:1px solid var(--border)}
header.top .wrap{height:64px;display:flex;align-items:center;justify-content:space-between}
.logo{font-weight:800;font-size:20px;letter-spacing:-.02em}.logo b{color:var(--primary)}
.top nav{display:flex;gap:4px}
.top nav a{padding:8px 14px;border-radius:8px;font-size:14px;font-weight:500;color:var(--b02)}
.top nav a:hover{background:var(--soft)}
.top nav a.on{color:var(--primary);font-weight:600;background:var(--accent)}

/* hero */
.hero{background:var(--accent);border-bottom:1px solid var(--border)}
.hero .wrap{padding:56px 24px 48px;display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.eyebrow{display:inline-block;font-size:14px;font-weight:600;color:var(--primary);background:#fff;border:1px solid rgba(239,72,35,.3);border-radius:999px;padding:4px 14px}
h1{font-size:40px;line-height:1.25;letter-spacing:-.03em;margin:16px 0 12px;font-weight:700}
.hero p.lead{color:var(--b02);margin:0 0 24px;max-width:520px}
.btn{display:inline-flex;align-items:center;gap:8px;height:48px;padding:0 24px;border-radius:8px;font-size:16px;font-weight:700;border:1px solid transparent;cursor:pointer}
.btn.pri{background:var(--primary);color:#fff}.btn.pri:hover{background:var(--primary-hover)}
.btn.out{background:#fff;color:var(--primary);border-color:var(--primary-border);margin-left:8px}
.hero .shot{border-radius:16px;overflow:hidden;border:1px solid var(--border);box-shadow:0 20px 40px -20px rgba(26,26,46,.25);background:#fff}

/* flow */
.flow{padding:40px 0 8px}
.flow ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.flow li{background:#fff;border:1px solid var(--border);border-radius:12px;padding:16px;font-size:14px;line-height:22px;color:var(--b02)}
.flow li i{font-style:normal;display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--primary);color:#fff;font-weight:700;font-size:13px;margin-bottom:10px}
.flow li b{display:block;color:var(--fg);font-size:16px}

/* layout */
.layout{display:grid;grid-template-columns:240px 1fr;gap:48px;padding:32px 0 96px}
aside.toc{position:sticky;top:88px;align-self:start;font-size:14px}
.toc h6{margin:0 0 8px;font-size:12px;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.toc a{display:block;padding:8px 12px;border-left:2px solid var(--border);color:var(--b02)}
.toc a:hover{color:var(--fg);background:var(--gray50)}
.toc a.on{border-color:var(--primary);color:var(--primary);font-weight:600;background:var(--accent)}
.toc a.sub{padding-left:24px;font-size:13px}

section.sec{padding-bottom:56px;margin-bottom:56px;border-bottom:1px solid var(--border)}
section.sec:last-child{border:0}
.num{display:inline-block;font-size:14px;font-weight:700;color:var(--primary);margin-bottom:4px}
h2{font-size:30px;line-height:36px;letter-spacing:-.02em;margin:0 0 16px;font-weight:700}
h3{font-size:24px;line-height:36px;margin:40px 0 12px;font-weight:600}
h4{font-size:16px;font-weight:600;margin:24px 0 8px}
p{margin:0 0 12px}
ul,ol.txt{margin:0 0 16px;padding-left:20px}li{margin-bottom:4px}
code{background:var(--soft);padding:2px 6px;border-radius:4px;font-size:14px}

/* screenshot frame */
figure{margin:20px 0 24px}
.frame{border:1px solid var(--border);border-radius:12px;overflow:hidden;background:#fff;cursor:zoom-in;transition:box-shadow .2s}
.frame:hover{box-shadow:0 12px 32px -12px rgba(26,26,46,.25)}
.frame .bar{height:28px;background:var(--soft);border-bottom:1px solid var(--border);display:flex;align-items:center;gap:6px;padding:0 12px}
.frame .bar i{width:9px;height:9px;border-radius:50%;background:var(--b06)}
figcaption{font-size:14px;color:var(--muted);margin-top:8px}

/* callouts */
.note{display:flex;gap:12px;border-radius:12px;padding:16px 18px;margin:20px 0;font-size:15px;line-height:24px;border:1px solid}
.note .ic{flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:800;font-size:14px}
.note.warn{background:var(--danger-soft);border-color:var(--danger-border)}.note.warn .ic{background:var(--danger)}
.note.tip{background:var(--info-soft);border-color:rgba(0,106,220,.3)}.note.tip .ic{background:var(--info)}
.note.ok{background:var(--success-soft);border-color:var(--success-border)}.note.ok .ic{background:var(--success)}
.note p{margin:0 0 6px}.note p:last-child{margin:0}

/* table */
.tbl{border:1px solid var(--border);border-radius:12px;overflow:hidden;margin:16px 0 24px;overflow-x:auto}
table{width:100%;border-collapse:collapse;font-size:15px;line-height:22px}
th{background:var(--soft);text-align:left;font-weight:600;padding:12px 16px;white-space:nowrap}
td{padding:12px 16px;border-top:1px solid var(--border);vertical-align:top}
td:first-child{font-weight:600;white-space:nowrap}

/* badges */
.badge{display:inline-block;font-size:13px;font-weight:600;padding:2px 10px;border-radius:999px;border:1px solid}
.b-ship{color:var(--info);background:var(--info-soft);border-color:rgba(0,106,220,.3)}
.b-warr{color:#B85420;background:#FDF5F2;border-color:rgba(223,114,51,.3)}
.b-no{color:var(--danger);background:var(--danger-soft);border-color:var(--danger-border)}

/* cards */
.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:16px 0 24px}
.card{background:var(--gray50);border:1px solid var(--border);border-radius:12px;padding:20px}
.card b{display:block;margin-bottom:4px}
.card span{font-size:14px;color:var(--b02);line-height:22px}
.steps{list-style:none;padding:0;counter-reset:s}
.steps li{counter-increment:s;position:relative;padding:14px 16px 14px 56px;border:1px solid var(--border);border-radius:12px;margin-bottom:8px}
.steps li::before{content:counter(s);position:absolute;left:16px;top:14px;width:26px;height:26px;border-radius:50%;background:var(--primary);color:#fff;font-weight:700;font-size:13px;display:grid;place-items:center}

/* navy banner */
.banner{background:var(--navy);color:#fff;border-radius:16px;padding:32px;margin:24px 0}
.banner h4{margin:0 0 6px;font-size:20px}.banner p{margin:0;color:rgba(255,255,255,.8)}

/* faq */
details{border:1px solid var(--border);border-radius:12px;margin-bottom:8px;background:#fff}
summary{cursor:pointer;padding:16px 20px;font-weight:600;list-style:none;display:flex;justify-content:space-between;gap:12px}
summary::after{content:"+";color:var(--primary);font-size:22px;line-height:24px}
details[open] summary::after{content:"–"}
details[open]{border-color:var(--primary-border)}
details .a{padding:0 20px 16px;color:var(--b02);font-size:15px}
details .a b{color:var(--fg)}

footer{background:var(--soft);border-top:1px solid var(--border);padding:32px 0;font-size:14px;color:var(--muted)}

dialog{border:0;padding:0;background:transparent;max-width:96vw}
dialog::backdrop{background:rgba(0,0,0,.6)}
dialog img{max-height:92vh;border-radius:12px}

@media(max-width:960px){
  .hero .wrap{grid-template-columns:1fr}.flow ol{grid-template-columns:repeat(2,1fr)}
  .layout{grid-template-columns:1fr}aside.toc{display:none}.cards{grid-template-columns:1fr}
  h1{font-size:30px}.top nav{display:none}
}
.hero .wrap{min-height:440px}.hero .shot{aspect-ratio:16/9}.hero .shot img{width:100%;height:100%;object-fit:cover;object-position:top left}