:root {
  color-scheme: dark;
  --ink: #e8f1ed;
  --muted: #aab9b2;
  --line: rgba(197, 228, 213, .15);
  --surface: #14231e;
  --panel: rgba(28, 46, 38, .82);
  --green: #54e2a6;
  --yellow: #f1c96f;
}

* { box-sizing: border-box; }
html { background: #08100d; }
body { max-width: 980px; margin: 0 auto; padding: 24px 18px 60px; background: radial-gradient(circle at 85% 0, #173a2d 0, transparent 34rem), #08100d; color: var(--ink); font-family: Inter, "Noto Sans SC", "Microsoft YaHei", system-ui, sans-serif; line-height: 1.75; }
a { color: #85f0bf; text-underline-offset: 3px; }
a:hover { color: #c1ffda; }
.eyebrow { margin: 0 0 7px; color: var(--green); font: 700 12px/1.2 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .14em; }
header { display: flex; justify-content: space-between; align-items: center; gap: 18px; padding-bottom: 22px; border-bottom: 1px solid var(--line); }
.brand { color: var(--ink); font-weight: 800; letter-spacing: .08em; text-decoration: none; }
.brand span { color: var(--green); }
.back { color: var(--muted); font-size: 14px; }
main { width: min(100%, 760px); margin: 0 auto; }
.hero { padding: 58px 0 34px; }
h1 { margin: 0; max-width: 15ch; font-size: clamp(34px, 6vw, 56px); line-height: 1.16; letter-spacing: -.045em; }
h2 { margin: 46px 0 14px; font-size: 25px; line-height: 1.35; }
h3 { margin: 0 0 8px; font-size: 17px; }
p { margin: 0 0 16px; color: #d7e4dd; }
.lede { max-width: 58ch; margin-top: 18px; color: #c1d1c9; font-size: 18px; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 26px; }
.button { display: inline-flex; align-items: center; min-height: 46px; padding: 0 18px; border: 1px solid rgba(84, 226, 166, .5); border-radius: 8px; background: var(--green); color: #062015; font-weight: 800; text-decoration: none; }
.button.secondary { border-color: var(--line); background: transparent; color: var(--ink); }
.proof { margin: 24px 0 0; padding: 16px 18px; border-left: 3px solid var(--yellow); background: rgba(241, 201, 111, .08); color: #f5e6bd; }
.steps, .cards, .citation-list { display: grid; gap: 12px; padding: 0; list-style: none; }
.steps { counter-reset: step; }
.steps li, .cards li, .citation-list li { padding: 18px; border: 1px solid var(--line); border-radius: 10px; background: var(--panel); }
.steps li { position: relative; padding-left: 58px; }
.steps li::before { counter-increment: step; content: counter(step); position: absolute; top: 18px; left: 18px; width: 25px; height: 25px; display: grid; place-items: center; border-radius: 50%; background: rgba(84, 226, 166, .17); color: var(--green); font: 800 13px/1 ui-monospace, monospace; }
.cards { grid-template-columns: repeat(auto-fit, minmax(215px, 1fr)); }
.cards p, .citation-list p { margin: 0; color: var(--muted); font-size: 14px; }
.callout { margin: 28px 0; padding: 22px; border: 1px solid rgba(84, 226, 166, .28); border-radius: 12px; background: linear-gradient(130deg, rgba(84, 226, 166, .12), rgba(84, 226, 166, .025)); }
.callout h2 { margin-top: 0; }
.simulator-shot { margin: 30px 0; overflow: hidden; border: 1px solid rgba(84, 226, 166, .22); border-radius: 12px; background: #101a16; }
.simulator-shot img { width: 100%; display: block; }
.simulator-shot figcaption { padding: 10px 13px; color: var(--muted); font-size: 13px; }
.faq details { padding: 15px 0; border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; color: var(--ink); font-weight: 700; }
.faq p { margin: 10px 0 0; color: var(--muted); }
.related { margin-top: 52px; padding-top: 20px; border-top: 1px solid var(--line); }
footer { margin-top: 44px; color: #7f938a; font-size: 13px; }
@media (max-width: 560px) { body { padding: 17px 14px 42px; } .hero { padding-top: 40px; } h1 { font-size: 37px; } header { align-items: flex-start; flex-direction: column; gap: 7px; } }