:root {
  --bg:#f8f7f4;
  --soft:#edebe4;
  --white:#ffffff;
  --text:#1f1f1f;
  --muted:#666666;
  --line:#e2e0d8;
  --accent:#5c3d3d;
  --dark:#2c2c2c;
}

* { box-sizing:border-box; }

html { scroll-behavior:smooth; }

body {
  margin:0;
  font-family:system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;
  background:#f4f5f7;
  color:var(--text);
  line-height:1.55;
}

a { color:inherit; text-decoration:none; }

.shell {
  max-width:1280px;
  margin:0 auto;
  background:var(--white);
  min-height:100vh;
}

.header {
  background:rgba(255,255,255,.96);
  backdrop-filter:blur(14px);
  border-bottom:1px solid var(--line);
  padding:20px 40px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:24px;
  position:sticky;
  top:0;
  z-index:50;
}

.logo {
  font-size:28px;
  font-weight:700;
  letter-spacing:-1px;
}

.logo sup {
  color:var(--accent);
  font-size:14px;
}

.nav {
  display:flex;
  gap:28px;
  align-items:center;
  font-size:15px;
  color:#333;
  flex-wrap:wrap;
}

.btn {
  display:inline-block;
  padding:14px 28px;
  border-radius:10px;
  border:1px solid var(--dark);
  font-weight:600;
}

.btn-primary {
  background:var(--dark);
  color:white;
}

.btn-outline {
  background:white;
  color:var(--dark);
}

.hero {
  background:linear-gradient(180deg,#f8f7f4 0%,#edebe4 100%);
  padding:132px 40px 110px;
  text-align:center;
}

.hero-inner {
  max-width:860px;
  margin:0 auto;
}

.kicker {
  color:var(--accent);
  font-size:13px;
  font-weight:650;
  letter-spacing:.12em;
  text-transform:uppercase;
  margin-bottom:28px;
}

h1 {
  font-size:clamp(46px,6vw,82px);
  line-height:1.02;
  letter-spacing:-.06em;
  margin:0 0 30px;
  font-weight:740;
}

h2 {
  font-size:clamp(32px,4vw,52px);
  line-height:1.08;
  letter-spacing:-.04em;
  margin:0 0 22px;
}

h3 {
  margin:0 0 14px;
  font-size:21px;
  letter-spacing:-.02em;
}

.lead {
  font-size:21px;
  color:#444;
  max-width:760px;
  margin:0 auto 44px;
}

.hero-actions {
  display:flex;
  gap:18px;
  justify-content:center;
  flex-wrap:wrap;
}

.trust-line {
  margin-top:44px;
  color:#555;
  font-size:15px;
}

.section {
  padding:96px 40px;
  border-top:1px solid var(--line);
}

.section-inner {
  max-width:1120px;
  margin:0 auto;
}

.section-head {
  max-width:760px;
  margin:0 auto 56px;
  text-align:center;
}

.section-head p {
  color:var(--muted);
  font-size:18px;
}

.grid {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:24px;
}

.card {
  background:white;
  border:1px solid var(--line);
  border-radius:16px;
  padding:28px;
  min-height:180px;
}

.card p, .card span {
  color:var(--muted);
}

.soft {
  background:#f8f7f4;
}

.problem-list {
  display:grid;
  gap:18px;
  max-width:820px;
  margin:0 auto;
}

.problem-item {
  background:white;
  border:1px solid var(--line);
  border-radius:14px;
  padding:22px;
}

.quote {
  max-width:900px;
  margin:58px auto 0;
  padding:36px;
  border-left:3px solid var(--accent);
  background:white;
  border-radius:0 18px 18px 0;
  font-size:24px;
  line-height:1.4;
  letter-spacing:-.03em;
}

.flow {
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(160px,1fr));
  gap:14px;
}

.step {
  border:1px solid var(--line);
  border-radius:16px;
  padding:22px;
  background:white;
}

.step small {
  color:var(--accent);
  font-weight:700;
}

.footer {
  background:#f4f5f7;
  padding:64px 40px 38px;
  text-align:center;
  color:#666;
  font-size:14px;
}

.footer a {
  margin:0 12px;
  color:#666;
}

.presentation-stage {
  min-height:calc(100vh - 84px);
  background:linear-gradient(180deg,#f8f7f4 0%,#ffffff 100%);
  display:grid;
  place-items:center;
  padding:60px 24px;
}

.slide-card {
  width:min(980px,100%);
  background:white;
  border:1px solid var(--line);
  border-radius:24px;
  padding:56px;
  box-shadow:0 26px 80px rgba(20,24,31,.08);
}

.slide-no {
  color:var(--accent);
  font-size:13px;
  font-weight:700;
  letter-spacing:.14em;
  text-transform:uppercase;
  margin-bottom:26px;
}

.slide-text {
  font-size:22px;
  color:#444;
  max-width:760px;
}

.slide-controls {
  margin-top:44px;
  display:flex;
  gap:12px;
  flex-wrap:wrap;
}

@media(max-width:800px){
  .header { padding:18px 22px; align-items:flex-start; flex-direction:column; }
  .nav { gap:16px; }
  .hero { padding:86px 24px 72px; }
  .section { padding:70px 24px; }
  .lead { font-size:18px; }
  .slide-card { padding:34px 24px; }
}