:root {
  --bg-grad: linear-gradient(180deg, #f6f9fd 0%, #e9eef7 100%);
  --surface: #ffffff;
  --surface-2: #f5f8fc;
  --border: #e4eaf3;
  --border-strong: #d2dcec;
  --text: #0f1b2e;
  --text-2: #44546b;
  --muted: #7c8aa0;
  --brand: #4f46e5;
  --brand-2: #0ea5e9;
  --grad: linear-gradient(135deg, #4f46e5 0%, #0ea5e9 100%);
  --accent-ink: #0b69a3;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
  --shadow: 0 1px 2px rgba(15, 23, 42, 0.04), 0 12px 30px rgba(15, 23, 42, 0.07);
  --shadow-lg: 0 24px 60px rgba(30, 41, 90, 0.16);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0; color: var(--text); background: var(--bg-grad); background-attachment: fixed;
  font: 16px/1.65 -apple-system, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--brand); text-decoration: none; }
a:hover { text-decoration: underline; }
.muted { color: var(--muted); }

/* ---------- Nav ---------- */
.nav {
  position: sticky; top: 0; z-index: 10; display: flex; align-items: center;
  justify-content: space-between; padding: 13px 24px;
  background: rgba(255, 255, 255, 0.82); backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
.nav-inner, .wrap { max-width: 1080px; margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 9px; font-weight: 750; color: var(--text); font-size: 17px; }
.brand img { border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 20px; font-size: 14.5px; }
.nav-links a { color: var(--text-2); }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block; border-radius: 11px; padding: 10px 17px; font-weight: 600;
  border: 1px solid var(--border-strong); background: var(--surface); color: var(--text);
  cursor: pointer; transition: box-shadow .15s, filter .15s, transform .05s, border-color .15s;
}
.btn:hover { text-decoration: none; box-shadow: var(--shadow-sm); border-color: var(--brand); color: var(--brand); }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--grad); border: none; color: #fff; box-shadow: 0 2px 10px rgba(79,70,229,.3); }
.btn-primary:hover { color: #fff; filter: brightness(1.06); box-shadow: 0 6px 18px rgba(79,70,229,.36); }
.btn-ghost { background: var(--surface); }
.btn-lg { padding: 14px 26px; font-size: 16px; border-radius: 13px; }

main { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* ---------- Hero ---------- */
.hero { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 48px; align-items: center; padding: 72px 0 56px; }
.hero-copy h1 {
  font-size: clamp(36px, 5vw, 54px); line-height: 1.04; letter-spacing: -0.03em; margin: 0 0 18px;
}
.hero-copy h1 .grad {
  background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent;
}
.eyebrow {
  display: inline-block; font-size: 12.5px; font-weight: 700; letter-spacing: 0.08em;
  text-transform: uppercase; color: var(--brand); background: rgba(79,70,229,.08);
  border: 1px solid rgba(79,70,229,.18); padding: 5px 11px; border-radius: 999px; margin-bottom: 18px;
}
.lede { font-size: clamp(16px, 2vw, 19px); color: var(--text-2); margin: 0 0 26px; max-width: 540px; }
.cta { display: flex; gap: 12px; flex-wrap: wrap; }
.fine { color: var(--muted); font-size: 13px; margin-top: 16px; }

/* Hero product mock */
.mock {
  background: var(--surface); border: 1px solid var(--border); border-radius: 20px;
  box-shadow: var(--shadow-lg); padding: 16px 18px 20px; transform: rotate(.4deg);
}
.mock-top { display: flex; align-items: center; gap: 8px; padding-bottom: 12px; border-bottom: 1px solid var(--border); }
.mock-logo { width: 24px; height: 24px; border-radius: 8px; background: var(--grad); display: inline-flex; align-items: center; justify-content: center; font-size: 13px; }
.mock-brand { font-weight: 700; font-size: 14px; }
.mock-pill { margin-left: auto; font-size: 11px; font-weight: 600; color: var(--brand);
  background: rgba(79,70,229,.08); border: 1px solid rgba(79,70,229,.18); border-radius: 999px; padding: 2px 9px; }
.mock h4 {
  font-size: 13px; margin: 14px 0 6px; padding-left: 9px; color: #16233a;
  border-left: 3px solid transparent; border-image: var(--grad) 1;
}
.mock p { margin: 0; font-size: 13px; color: var(--text-2); }
.mock-table { width: 100%; border-collapse: separate; border-spacing: 0; margin-top: 8px; font-size: 12px;
  border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
.mock-table th, .mock-table td { padding: 5px 9px; text-align: left; border-bottom: 1px solid var(--border); }
.mock-table th { background: var(--surface-2); color: var(--accent-ink); font-weight: 650; }
.mock-table tr:last-child td { border-bottom: none; }
.mock-cursor { color: var(--brand); animation: blink 1s steps(2) infinite; }
@keyframes blink { 0%,50%{opacity:1} 50.01%,100%{opacity:0} }

/* ---------- Sections ---------- */
.section { padding: 56px 0; border-top: 1px solid var(--border); }
.section-head { text-align: center; max-width: 640px; margin: 0 auto 32px; }
.section h2 { font-size: clamp(25px, 3.5vw, 33px); letter-spacing: -0.02em; margin: 0 0 10px; }
.section-head p { color: var(--text-2); margin: 0; }

.grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 22px; box-shadow: var(--shadow-sm); transition: box-shadow .15s, transform .1s; }
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.card .ico { width: 38px; height: 38px; border-radius: 11px; background: rgba(79,70,229,.08); display: flex; align-items: center; justify-content: center; font-size: 19px; margin-bottom: 12px; }
.card h3 { margin: 0 0 6px; font-size: 16.5px; }
.card p { margin: 0; color: var(--text-2); font-size: 14.5px; }

/* Steps */
.steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: step; }
.step { position: relative; background: var(--surface); border: 1px solid var(--border); border-radius: 16px; padding: 24px 22px; box-shadow: var(--shadow-sm); }
.step::before {
  counter-increment: step; content: counter(step); display: flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 9px; background: var(--grad); color: #fff; font-weight: 700; font-size: 15px; margin-bottom: 12px;
}
.step h3 { margin: 0 0 5px; font-size: 16px; }
.step p { margin: 0; color: var(--text-2); font-size: 14px; }

/* Models */
.models { list-style: none; display: flex; flex-wrap: wrap; gap: 10px; padding: 0; margin: 0; justify-content: center; }
.models li {
  background: var(--surface); border: 1px solid var(--border-strong); color: var(--text);
  border-radius: 999px; padding: 8px 16px; font-weight: 600; font-size: 14px; box-shadow: var(--shadow-sm);
}

/* CTA band */
.band { text-align: center; background: var(--grad); border-radius: 22px; padding: 48px 24px; color: #fff; box-shadow: var(--shadow-lg); margin: 56px 0; }
.band h2 { color: #fff; margin: 0 0 8px; }
.band p { color: rgba(255,255,255,.9); margin: 0 0 22px; }
.band .btn { background: #fff; color: var(--brand); border: none; }
.band .btn:hover { color: var(--brand); filter: brightness(.98); }

/* ---------- Footer ---------- */
.foot { border-top: 1px solid var(--border); margin-top: 8px; }
.foot-inner { max-width: 1080px; margin: 0 auto; padding: 28px 24px 48px; }
.foot-row { display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; }
.foot-brand { display: flex; align-items: center; gap: 8px; font-weight: 700; }
.foot-brand img { border-radius: 7px; }
.foot-links { display: flex; gap: 18px; font-size: 14px; }
.foot-links a { color: var(--text-2); }
.foot-fine { color: var(--muted); font-size: 12.5px; margin: 16px 0 0; }

/* ---------- Legal pages ---------- */
.legal { max-width: 760px; margin: 0 auto; padding: 48px 24px 72px; }
.legal h1 { font-size: clamp(28px, 4vw, 36px); letter-spacing: -0.02em; margin: 0 0 6px; }
.legal .updated { color: var(--muted); font-size: 13.5px; margin: 0 0 28px; }
.legal h2 { font-size: 19px; margin: 30px 0 8px; letter-spacing: -0.01em; }
.legal p, .legal li { color: var(--text-2); }
.legal ul { padding-left: 22px; }
.legal li { margin: 6px 0; }
.legal code { background: var(--surface-2); border: 1px solid var(--border); border-radius: 5px; padding: 1px 5px; color: var(--brand); font-size: 13.5px; }
.legal .tldr { background: var(--surface); border: 1px solid var(--border); border-left: 3px solid transparent; border-image: var(--grad) 1; border-radius: 10px; padding: 14px 16px; color: var(--text); }
.legal .back { margin-top: 34px; display: inline-block; }

@media (max-width: 860px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding: 48px 0 40px; }
  .mock { transform: none; max-width: 460px; }
}
@media (max-width: 720px) {
  .grid, .steps { grid-template-columns: 1fr; }
  .nav-links a:not(.btn) { display: none; }
}