:root {
  --ink: #15201b; --ink-2: #3b4842; --muted: #66716b; --line: #e3e7e2; --bg: #fbfbf8; --card: #ffffff;
  --accent: #1f6f5c; --accent-2: #2b8a72; --soft: #e9f3ef; --warm: #f6efe3; --radius: 16px;
  --shadow: 0 1px 2px rgba(20, 32, 27, .04), 0 12px 32px rgba(20, 32, 27, .07);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font: 17px/1.6 "Segoe UI", -apple-system, BlinkMacSystemFont, Roboto, Helvetica, Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); }
img, svg { display: block; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }

/* nav */
.nav { position: sticky; top: 0; z-index: 10; background: rgba(251, 251, 248, .88); backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent; transition: border-color .2s; }
.nav.scrolled { border-bottom-color: var(--line); }
.nav .wrap { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); text-decoration: none; font-weight: 700; font-size: 17px; }
.nav ul { display: flex; gap: 28px; list-style: none; margin: 0; padding: 0; }
.nav ul a { color: var(--ink-2); text-decoration: none; font-size: 15px; }
.nav ul a:hover { color: var(--accent); }
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 12px 22px; border-radius: 999px; font-weight: 600;
  font-size: 15px; text-decoration: none; transition: transform .15s, background .15s, box-shadow .15s; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 6px 18px rgba(31, 111, 92, .28); }
.btn-primary:hover { background: var(--accent-2); transform: translateY(-1px); }
.btn-ghost { color: var(--ink); border: 1px solid var(--line); background: var(--card); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.nav .btn { padding: 9px 18px; }

/* hero */
.hero { padding: 72px 0 56px; }
.hero .wrap { display: grid; grid-template-columns: 1.05fr .95fr; gap: 56px; align-items: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 8px; padding: 6px 12px; border-radius: 999px; background: var(--soft);
  color: var(--accent); font-size: 13px; font-weight: 600; }
h1 { font-size: clamp(36px, 5vw, 58px); line-height: 1.06; letter-spacing: -.03em; margin: 18px 0 18px; font-weight: 750; }
h1 em { font-style: normal; color: var(--accent); }
.lead { font-size: 19px; color: var(--ink-2); max-width: 34em; margin: 0 0 30px; }
.cta-row { display: flex; gap: 12px; flex-wrap: wrap; }
.fine { color: var(--muted); font-size: 14px; margin-top: 14px; }

/* before / after card */
.demo { position: relative; }
.demo .card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); padding: 22px; }
.demo .tabs { display: flex; gap: 6px; margin-bottom: 16px; }
.demo .tab { padding: 6px 12px; border: 0; border-radius: 999px; font-family: inherit; font-size: 13px; font-weight: 600; color: var(--muted);
  background: #f2f4f1; cursor: pointer; }
.demo .tab.on { background: var(--accent); color: #fff; }
.product { display: grid; grid-template-columns: 112px 1fr; gap: 16px; }
.thumb { width: 112px; height: 112px; border-radius: 12px; background: linear-gradient(145deg, #f3e7d3, #e6d2b1); display: grid; place-items: center; }
.product h3 { margin: 2px 0 6px; font-size: 18px; letter-spacing: -.01em; }
.product p { margin: 0 0 8px; color: var(--ink-2); font-size: 14.5px; line-height: 1.5; }
.price { font-weight: 700; }
.back { margin-top: 14px; padding: 10px 12px; border-radius: 10px; background: var(--soft); color: var(--ink-2); font-size: 13px; }
.back b { color: var(--accent); }
.float { position: absolute; right: -14px; bottom: -18px; background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  box-shadow: var(--shadow); padding: 10px 14px; font-size: 13px; display: flex; gap: 8px; align-items: center; }
.dot { width: 8px; height: 8px; border-radius: 50%; background: #2fb37d; }

/* sections */
section { padding: 84px 0; }
.section-head { max-width: 720px; margin-bottom: 44px; }
h2 { font-size: clamp(28px, 3.4vw, 40px); line-height: 1.15; letter-spacing: -.02em; margin: 10px 0 14px; font-weight: 720; }
.kicker { color: var(--accent); font-weight: 700; font-size: 13px; letter-spacing: .08em; text-transform: uppercase; }
.sub { color: var(--ink-2); font-size: 18px; margin: 0; }

.band { background: var(--card); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
.stat { display: grid; grid-template-columns: auto 1fr; gap: 28px; align-items: center; }
.stat .big { font-size: clamp(56px, 7vw, 88px); font-weight: 780; letter-spacing: -.04em; color: var(--accent); line-height: 1; }
.stat p { margin: 0; font-size: 20px; color: var(--ink-2); max-width: 32em; }
.stat small { display: block; color: var(--muted); font-size: 14px; margin-top: 8px; }

.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; counter-reset: s; }
.step { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 24px; position: relative; }
.step::before { counter-increment: s; content: counter(s); display: grid; place-items: center; width: 34px; height: 34px;
  border-radius: 10px; background: var(--soft); color: var(--accent); font-weight: 750; margin-bottom: 16px; }
.step h3 { margin: 0 0 8px; font-size: 18px; }
.step p { margin: 0; color: var(--ink-2); font-size: 15px; }

.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.panel { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 28px; }
.panel h3 { margin: 0 0 14px; font-size: 20px; }
.ticks { list-style: none; margin: 0; padding: 0; }
.ticks li { display: flex; gap: 12px; padding: 9px 0; border-top: 1px solid var(--line); color: var(--ink-2); }
.ticks li:first-child { border-top: 0; }
.ticks li::before { content: ""; flex: none; width: 20px; height: 20px; margin-top: 3px; border-radius: 6px; background: var(--soft)
  url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20'%3E%3Cpath d='M5 10.5l3 3 7-7' fill='none' stroke='%231f6f5c' stroke-width='2.2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/16px no-repeat; }
.ticks b { color: var(--ink); font-weight: 600; }

.quality { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 18px; }
.q { padding: 26px; border-radius: var(--radius); background: var(--card); border: 1px solid var(--line); }
.q .ico { width: 44px; height: 44px; border-radius: 12px; background: var(--soft); display: grid; place-items: center; margin-bottom: 16px; }
.q h3 { margin: 0 0 8px; font-size: 18px; }
.q p { margin: 0; color: var(--ink-2); font-size: 15px; }

.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { padding: 9px 16px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); font-weight: 600; font-size: 15px; }
.chip span { color: var(--muted); font-weight: 500; margin-left: 6px; }

.faq { max-width: 820px; }
details { background: var(--card); border: 1px solid var(--line); border-radius: 14px; padding: 18px 22px; margin-bottom: 10px; }
summary { cursor: pointer; font-weight: 650; list-style: none; display: flex; justify-content: space-between; gap: 16px; }
summary::-webkit-details-marker { display: none; }
summary::after { content: "+"; color: var(--accent); font-size: 22px; line-height: 1; }
details[open] summary::after { content: "–"; }
details p { color: var(--ink-2); margin: 12px 0 0; }

.final { background: var(--accent); color: #fff; border-radius: 24px; padding: 56px; display: grid; grid-template-columns: 1.3fr auto;
  gap: 32px; align-items: center; position: relative; overflow: hidden; }
.final h2 { color: #fff; margin: 0 0 10px; }
.final p { margin: 0; opacity: .88; font-size: 18px; }
.final .btn { background: #fff; color: var(--accent); }
.final::after { content: ""; position: absolute; right: -80px; top: -80px; width: 260px; height: 260px; border-radius: 50%;
  border: 40px solid rgba(255, 255, 255, .07); }

footer { padding: 44px 0 56px; color: var(--muted); font-size: 14px; }
footer .wrap { display: flex; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
footer a { color: var(--muted); text-decoration: none; margin-left: 20px; }
footer a:hover { color: var(--accent); }

/* plain text pages */
.doc { max-width: 760px; padding: 56px 24px 80px; margin: 0 auto; }
.doc h1 { font-size: 40px; }
.doc h2 { font-size: 22px; margin-top: 36px; }
.doc p, .doc li { color: var(--ink-2); }
.doc code { background: var(--soft); padding: 2px 6px; border-radius: 6px; font-size: 15px; }

@media (max-width: 900px) {
  .hero .wrap, .grid2, .final { grid-template-columns: 1fr; }
  .steps, .quality { grid-template-columns: 1fr 1fr; }
  .nav ul { display: none; }
  .float { right: 10px; }
  .stat { grid-template-columns: 1fr; gap: 10px; }
}
@media (max-width: 560px) {
  body { font-size: 16px; }
  .wrap { padding: 0 16px; }
  .steps, .quality { grid-template-columns: 1fr; }
  section { padding: 60px 0; }
  .final { padding: 32px 24px; border-radius: 18px; }
  .product { grid-template-columns: 80px 1fr; }
  .thumb { width: 80px; height: 80px; }
  footer a { margin: 0 16px 0 0; }
}