:root {
  --bg: #f8fbff;
  --surface: #ffffff;
  --text: #0f172a;
  --muted: #64748b;
  --line: #e2e8f0;
  --primary: #0ea5e9;
  --primary-dark: #0284c7;
  --green: #10b981;
  --green-dark: #047857;
  --shadow: 0 24px 70px rgba(15, 23, 42, .10);
  --radius: 28px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 12% 10%, rgba(14, 165, 233, .12), transparent 30%),
    radial-gradient(circle at 86% 16%, rgba(16, 185, 129, .13), transparent 32%),
    var(--bg);
  line-height: 1.6;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 16px clamp(18px, 5vw, 72px);
  background: rgba(248, 251, 255, .76);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(226, 232, 240, .75);
}
.brand img { width: 220px; height: auto; }
.nav { display: flex; align-items: center; gap: 24px; color: #334155; font-weight: 650; }
.nav a { transition: color .2s ease, transform .2s ease; }
.nav a:hover { color: var(--primary-dark); transform: translateY(-1px); }
.nav-cta { padding: 10px 16px; border-radius: 999px; background: #e0f2fe; color: #0369a1; }

.section-pad { padding: 88px clamp(18px, 5vw, 72px); }
.compact { padding-top: 64px; padding-bottom: 64px; }

.hero {
  min-height: calc(100vh - 82px);
  display: grid;
  grid-template-columns: minmax(0, 1.02fr) minmax(320px, .98fr);
  align-items: center;
  gap: clamp(32px, 5vw, 72px);
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  color: var(--primary-dark);
  font-size: 13px;
  letter-spacing: .12em;
  text-transform: uppercase;
  font-weight: 850;
}
.eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--primary), var(--green));
}
h1, h2, h3 { line-height: 1.12; margin: 0; }
h1 { font-size: clamp(42px, 6vw, 78px); letter-spacing: -.055em; }
h1 span {
  display: inline-block;
  color: transparent;
  background: linear-gradient(90deg, var(--primary-dark), var(--green-dark));
  -webkit-background-clip: text;
  background-clip: text;
}
.hero-lead { max-width: 680px; margin: 24px 0 0; font-size: clamp(18px, 2vw, 22px); color: #475569; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 52px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  border: 0;
  cursor: pointer;
  transition: transform .2s ease, box-shadow .2s ease, background .2s ease;
}
.btn:hover { transform: translateY(-2px); }
.primary { color: white; background: linear-gradient(135deg, var(--primary), var(--green)); box-shadow: 0 16px 34px rgba(14, 165, 233, .26); }
.secondary { color: #0369a1; background: #e0f2fe; }
.trust-row { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 28px; }
.trust-row span {
  padding: 10px 13px;
  border: 1px solid var(--line);
  background: rgba(255,255,255,.72);
  border-radius: 999px;
  color: #475569;
  font-size: 14px;
  font-weight: 700;
}
.hero-visual { position: relative; }
.hero-visual img { filter: drop-shadow(0 30px 70px rgba(15, 23, 42, .10)); }

.section-title { max-width: 860px; margin: 0 auto 36px; text-align: center; }
.section-title.narrow { max-width: 720px; }
.section-title h2, .value-box h2, .contact-card h2 { font-size: clamp(32px, 4vw, 52px); letter-spacing: -.035em; }
.section-title p:not(.eyebrow), .value-box p, .contact-note { color: var(--muted); font-size: 18px; }
.meaning-grid, .benefit-list, .usecase-wrap {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  max-width: 1180px;
  margin: 0 auto;
}
.meaning-grid article, .benefit-card, .usecase, .contact-card, .value-box {
  background: rgba(255,255,255,.86);
  border: 1px solid rgba(226, 232, 240, .9);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}
.meaning-grid article { padding: 30px; }
.icon { display: inline-flex; font-size: 34px; margin-bottom: 18px; }
.meaning-grid h3, .benefit-card h3, .usecase h3 { font-size: 22px; margin-bottom: 12px; }
.meaning-grid p, .benefit-card p, .usecase p { color: var(--muted); margin: 0; }

.benefits { background: linear-gradient(180deg, transparent, rgba(224, 242, 254, .35), transparent); }
.benefit-list { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.benefit-card { padding: 28px; min-height: 290px; }
.benefit-card strong { display: block; color: var(--green-dark); font-size: 15px; margin-bottom: 18px; }

.usecase-wrap { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.usecase { padding: 30px; }
.usecase.active { background: linear-gradient(135deg, #eff6ff, #ecfdf5); border-color: #bae6fd; }

.value-box { max-width: 1120px; margin: 0 auto; padding: clamp(32px, 6vw, 72px); text-align: center; background: #0f172a; color: white; overflow: hidden; position: relative; }
.value-box::after {
  content: "";
  position: absolute;
  width: 420px;
  height: 420px;
  right: -160px;
  top: -160px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(14,165,233,.55), transparent 68%);
}
.value-box .eyebrow, .value-box p { color: #bae6fd; }
.value-box h2, .value-box p { position: relative; z-index: 1; }
.value-box p { max-width: 780px; margin: 22px auto 0; }

.contact-card { max-width: 920px; margin: 0 auto; padding: clamp(28px, 5vw, 56px); text-align: center; }
.reveal-btn { margin-top: 24px; }
.contact-info {
  display: grid;
  gap: 14px;
  max-width: 520px;
  margin: 26px auto 0;
  text-align: left;
  animation: fadeUp .35s ease both;
}
.contact-info a:not(.btn) {
  padding: 16px 18px;
  border-radius: 18px;
  background: #f8fafc;
  border: 1px solid var(--line);
  color: #0f172a;
  font-weight: 750;
}
code { background: #eef6ff; color: #075985; padding: 3px 7px; border-radius: 8px; }
.footer {
  padding: 28px clamp(18px, 5vw, 72px);
  display: flex;
  justify-content: space-between;
  gap: 18px;
  color: #64748b;
  border-top: 1px solid var(--line);
}
.footer a { color: #0369a1; font-weight: 800; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-visual { order: -1; max-width: 640px; margin: 0 auto; }
  .meaning-grid, .benefit-list { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 720px) {
  .site-header { position: relative; align-items: flex-start; flex-direction: column; }
  .nav { width: 100%; overflow-x: auto; gap: 16px; padding-bottom: 4px; }
  .brand img { width: 190px; }
  .section-pad { padding-left: 18px; padding-right: 18px; }
  .meaning-grid, .benefit-list, .usecase-wrap { grid-template-columns: 1fr; }
  .benefit-card { min-height: auto; }
  .footer { flex-direction: column; }
}