:root {
  --blue: #2f6bff; --blue-dark: #1f4fd6; --navy: #111827; --ink: #1f2937; --muted: #6b7280;
  --bg: #f6f8fb; --card: #ffffff; --line: #e5e9f0; --green: #0ea371; --amber: #f59e0b; --radius: 14px;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Pretendard, -apple-system, "Segoe UI", "Malgun Gothic", sans-serif; color: var(--ink); background: var(--bg); line-height: 1.65; word-break: keep-all; }
a { color: var(--blue); text-decoration: none; }
a:hover { text-decoration: underline; }
img, video { max-width: 100%; height: auto; display: block; }
.wrap { max-width: 1040px; margin: 0 auto; padding: 0 20px; }

/* header */
.top { position: sticky; top: 0; z-index: 10; background: rgba(255,255,255,.92); backdrop-filter: blur(8px); border-bottom: 1px solid var(--line); }
.top .wrap { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; font-size: 18px; color: var(--navy); }
.brand img { width: 30px; height: 30px; border-radius: 8px; }
.nav a { margin-left: 18px; color: var(--ink); font-weight: 600; font-size: 15px; }
.nav a.cta { background: var(--blue); color: #fff; padding: 8px 14px; border-radius: 10px; }
.nav a.cta:hover { background: var(--blue-dark); text-decoration: none; }
@media (max-width: 640px) { .nav a:not(.cta) { display: none; } }

/* hero */
.hero { padding: 64px 0 40px; }
.hero h1 { font-size: clamp(30px, 5vw, 46px); line-height: 1.25; margin: 0 0 16px; color: var(--navy); letter-spacing: -0.5px; }
.hero h1 em { font-style: normal; color: var(--blue); }
.hero p.lead { font-size: 18px; color: var(--muted); margin: 0 0 26px; max-width: 640px; }
.btns { display: flex; flex-wrap: wrap; gap: 10px; }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 13px 20px; border-radius: 12px; font-weight: 700; font-size: 16px; border: 1px solid var(--line); background: #fff; color: var(--ink); }
.btn:hover { text-decoration: none; border-color: #cfd6e2; }
.btn.primary { background: var(--blue); color: #fff; border-color: var(--blue); }
.btn.primary:hover { background: var(--blue-dark); }
.btn small { font-weight: 500; opacity: .8; font-size: 13px; }
.note { font-size: 13px; color: var(--muted); margin-top: 10px; }

.video { margin: 36px 0 0; background: #0b1220; border-radius: var(--radius); overflow: hidden; box-shadow: 0 20px 50px rgba(17,24,39,.18); }
.video video { width: 100%; }
.video .cap { color: #9fb0cc; font-size: 13px; padding: 10px 16px; }

/* sections */
section { padding: 56px 0; }
section h2 { font-size: 28px; margin: 0 0 8px; color: var(--navy); letter-spacing: -0.3px; }
section p.sub { color: var(--muted); margin: 0 0 28px; font-size: 16px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); }
.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.card h3 { margin: 0 0 8px; font-size: 18px; color: var(--navy); }
.card p { margin: 0; color: var(--muted); font-size: 15px; }
.card .ico { width: 40px; height: 40px; border-radius: 10px; background: #eaf0ff; color: var(--blue); display: flex; align-items: center; justify-content: center; font-weight: 800; margin-bottom: 12px; font-size: 18px; }

/* steps */
.steps { counter-reset: s; display: grid; gap: 14px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 20px; position: relative; }
.step::before { counter-increment: s; content: counter(s); position: absolute; top: -12px; left: 16px; width: 28px; height: 28px; border-radius: 50%; background: var(--blue); color: #fff; font-weight: 800; display: flex; align-items: center; justify-content: center; font-size: 14px; }
.step h3 { margin: 6px 0 6px; font-size: 16px; }
.step p { margin: 0; color: var(--muted); font-size: 14px; }

/* pricing */
.price { display: grid; gap: 16px; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 22px; }
.plan.hot { border-color: var(--blue); box-shadow: 0 10px 30px rgba(47,107,255,.12); }
.plan .name { font-weight: 700; color: var(--muted); font-size: 14px; }
.plan .amt { font-size: 30px; font-weight: 800; color: var(--navy); margin: 4px 0 2px; }
.plan .amt span { font-size: 14px; color: var(--muted); font-weight: 500; }
.plan ul { padding-left: 18px; margin: 12px 0 0; color: var(--ink); font-size: 14px; }
.plan li { margin: 4px 0; }
.tag { display: inline-block; background: #eaf0ff; color: var(--blue); font-size: 12px; font-weight: 700; padding: 3px 8px; border-radius: 999px; margin-left: 6px; }

/* faq */
details { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 18px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 700; color: var(--navy); }
details p { margin: 10px 0 0; color: var(--ink); font-size: 15px; }

/* guide */
.guide { display: grid; grid-template-columns: 240px 1fr; gap: 32px; padding-top: 40px; }
.toc { position: sticky; top: 80px; align-self: start; background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px; font-size: 14px; }
.toc a { display: block; padding: 5px 6px; color: var(--ink); border-radius: 6px; }
.toc a:hover { background: #f0f3f9; text-decoration: none; }
.doc h1 { font-size: 32px; margin: 0 0 6px; color: var(--navy); }
.doc h2 { font-size: 22px; margin: 44px 0 12px; padding-top: 8px; border-top: 1px solid var(--line); color: var(--navy); }
.doc h3 { font-size: 17px; margin: 22px 0 6px; }
.doc p, .doc li { font-size: 16px; }
.doc ol, .doc ul { padding-left: 22px; }
.doc li { margin: 6px 0; }
.doc code, .doc kbd { background: #eef2f8; border: 1px solid var(--line); border-radius: 6px; padding: 1px 6px; font-size: 14px; font-family: Consolas, "Malgun Gothic", monospace; }
.doc .tip { background: #eefaf4; border-left: 4px solid var(--green); padding: 12px 16px; border-radius: 8px; margin: 14px 0; }
.doc .warn { background: #fff7e6; border-left: 4px solid var(--amber); padding: 12px 16px; border-radius: 8px; margin: 14px 0; }
.doc table { border-collapse: collapse; width: 100%; font-size: 15px; margin: 10px 0; }
.doc th, .doc td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
.doc th { background: #f0f3f9; }
.shot { border: 1px solid var(--line); border-radius: 12px; margin: 14px 0; box-shadow: 0 10px 30px rgba(17,24,39,.08); }
@media (max-width: 820px) { .guide { grid-template-columns: 1fr; } .toc { position: static; } }

footer { border-top: 1px solid var(--line); padding: 28px 0 40px; color: var(--muted); font-size: 13px; }
footer a { color: var(--muted); }