:root {
  --ink: #1c1917;
  --ink-2: #57534e;
  --ink-3: #8a827b;
  --line: #e7e2dc;
  --bg: #fffdfb;
  --bg-2: #faf6f1;
  --accent: #c2410c;
  --accent-soft: #fff1e7;
  --radius: 14px;
  --max: 960px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font: 16px/1.7 -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
        "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 24px; }

/* header */
header {
  border-bottom: 1px solid var(--line);
  background: rgba(255, 253, 251, 0.92);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 10;
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 650;
  letter-spacing: -0.01em;
  color: var(--ink);
}
.brand:hover { text-decoration: none; }
.dot {
  width: 22px; height: 22px;
  border-radius: 7px;
  background: linear-gradient(135deg, #f97316, #c2410c);
  display: inline-block;
}
.nav-links { display: flex; gap: 22px; font-size: 14.5px; color: var(--ink-2); }
.nav-links a { color: var(--ink-2); }
.nav-links a:hover { color: var(--ink); text-decoration: none; }

/* hero */
.hero { padding: 72px 0 56px; }
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 999px;
  padding: 5px 12px;
  margin-bottom: 22px;
}
h1 {
  font-size: 44px;
  line-height: 1.18;
  letter-spacing: -0.025em;
  margin: 0 0 18px;
  font-weight: 680;
  max-width: 17em;
}
.lead {
  font-size: 18.5px;
  color: var(--ink-2);
  max-width: 34em;
  margin: 0 0 30px;
}
.cta-row { display: flex; flex-wrap: wrap; gap: 12px; align-items: center; }
.btn {
  display: inline-block;
  padding: 12px 22px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 15px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  cursor: pointer;
}
.btn:hover { text-decoration: none; border-color: #d6cfc7; }
.btn-primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.btn-primary:hover { background: #9a3412; border-color: #9a3412; }
.hint { font-size: 13.5px; color: var(--ink-3); margin-top: 14px; }

/* sections */
section { padding: 56px 0; border-top: 1px solid var(--line); }
h2 {
  font-size: 27px;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  font-weight: 660;
}
.sub { color: var(--ink-2); margin: 0 0 34px; max-width: 40em; }

.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}
.card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 22px;
  background: #fff;
}
.card h3 {
  margin: 0 0 8px;
  font-size: 16.5px;
  font-weight: 640;
}
.card p { margin: 0; color: var(--ink-2); font-size: 14.8px; }
.num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 26px; height: 26px;
  border-radius: 8px;
  background: var(--accent-soft);
  color: var(--accent);
  font-size: 13.5px;
  font-weight: 700;
  margin-bottom: 12px;
}

/* pricing */
.price-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 20px;
  align-items: start;
}
.price {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  background: #fff;
}
.price.featured { border-color: var(--accent); box-shadow: 0 1px 0 var(--accent) inset; }
.price .tag {
  font-size: 13px;
  font-weight: 600;
  color: var(--ink-3);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.price .amount {
  font-size: 36px;
  font-weight: 680;
  letter-spacing: -0.03em;
  margin: 8px 0 2px;
}
.price .amount span { font-size: 15px; font-weight: 500; color: var(--ink-3); }
.price ul { list-style: none; padding: 0; margin: 18px 0 22px; }
.price li {
  font-size: 14.6px;
  color: var(--ink-2);
  padding: 6px 0 6px 24px;
  position: relative;
}
.price li::before {
  content: "";
  position: absolute;
  left: 4px; top: 15px;
  width: 9px; height: 5px;
  border-left: 2px solid var(--accent);
  border-bottom: 2px solid var(--accent);
  transform: rotate(-45deg);
}
.price .btn { width: 100%; text-align: center; }

/* faq */
.faq-item {
  border-bottom: 1px solid var(--line);
  padding: 18px 0;
}
.faq-item h3 {
  margin: 0 0 6px;
  font-size: 15.8px;
  font-weight: 620;
}
.faq-item p { margin: 0; color: var(--ink-2); font-size: 14.8px; }

/* doc pages */
.doc { padding: 48px 0 72px; max-width: 760px; }
.doc h1 { font-size: 32px; margin-bottom: 8px; }
.doc .meta { color: var(--ink-3); font-size: 13.5px; margin-bottom: 32px; }
.doc h2 { font-size: 20px; margin: 34px 0 10px; }
.doc h3 { font-size: 16px; margin: 22px 0 6px; }
.doc p, .doc li { color: var(--ink-2); font-size: 15px; }
.doc li { margin: 6px 0; }
.doc table {
  width: 100%;
  border-collapse: collapse;
  margin: 16px 0;
  font-size: 14.5px;
}
.doc th, .doc td {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 1px solid var(--line);
  color: var(--ink-2);
}
.doc th { color: var(--ink); font-weight: 620; background: var(--bg-2); }

/* footer */
footer {
  border-top: 1px solid var(--line);
  padding: 40px 0 56px;
  background: var(--bg-2);
}
.foot {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  justify-content: space-between;
  font-size: 14px;
  color: var(--ink-3);
}
.foot a { color: var(--ink-2); }
.foot-links { display: flex; flex-wrap: wrap; gap: 18px; }

@media (max-width: 640px) {
  h1 { font-size: 32px; }
  .hero { padding: 44px 0 36px; }
  .nav-links { display: none; }
  section { padding: 40px 0; }
}