:root {
  --bg: #0b111b;
  --paper: #f4f6fa;
  --ink: #16202e;
  --soft: #5a6b7d;
  --gold: #ffb700;
  --line: #e7eaf0;
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; font-family: Kanit, sans-serif; color: var(--ink); background: var(--paper); line-height: 1.65; }
a { color: inherit; }
.top { background: var(--bg); color: #fff; padding: 32px 20px 24px; }
.wrap { max-width: 1100px; margin: 0 auto; }
.brand { color: var(--gold); font-weight: 700; }
h1 { margin: 8px 0 6px; font-size: 36px; line-height: 1.25; }
.lead { margin: 0; color: #c5d0de; max-width: 720px; }
.nav { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 18px; }
.nav a { text-decoration: none; background: #162030; border: 1px solid #26344c; color: #fff; border-radius: 999px; padding: 6px 12px; font-size: 14px; }
.banner-row { padding: 18px 20px 0; }
.banner { background: #fff6e0; color: #6b4e00; border-radius: 14px; padding: 12px 20px; margin: 0 auto; max-width: 1100px; text-align: center; }
main { padding: 8px 20px 56px; }
.chapter { padding: 36px 0 28px; border-bottom: 1px solid var(--line); }
.eyebrow { margin: 0; color: #8a5a00; font-weight: 700; font-size: 13px; letter-spacing: .04em; }
h2 { margin: 4px 0 8px; font-size: 28px; }
.intro { margin: 0 0 16px; max-width: 760px; }
.split { display: grid; grid-template-columns: minmax(0, 1fr) 300px; gap: 28px; align-items: start; }
.flow { margin: 0; padding: 0; list-style: none; }
.flow li { display: grid; grid-template-columns: 32px 1fr; gap: 10px; margin: 0 0 14px; }
.n { width: 32px; height: 32px; border-radius: 16px; background: var(--ink); color: #fff; display: grid; place-items: center; font-weight: 700; font-size: 14px; }
.flow h3 { margin: 4px 0 2px; font-size: 17px; }
.flow p { margin: 0; color: #3d4b5c; }
.shots { display: flex; flex-direction: column; gap: 18px; }
.device { background: #0d1520; border-radius: 32px; padding: 8px; box-shadow: 0 16px 36px rgba(13,21,32,.25); }
.device img { width: 100%; height: auto; display: block; border-radius: 26px; background: #f3f5f9; }
figcaption { text-align: center; color: var(--soft); font-size: 13px; margin-top: 6px; }
.callout { background: #fff; border-radius: 16px; padding: 14px 16px; margin-top: 8px; border: 1px solid var(--line); }
.callout strong { display: block; margin-bottom: 4px; }
footer { background: var(--bg); color: #9aa8bc; padding: 22px 20px 32px; font-size: 14px; }
@media (max-width: 860px) {
  h1 { font-size: 28px; }
  .split { grid-template-columns: 1fr; }
  .shots { max-width: 320px; }
}