:root {
  --ink: #1c1917;
  --muted: #57534e;
  --line: #e7e5e4;
  --paper: #f6f4f1;
  --card: #fffcf8;
  --red: #e10600;
  --red-dark: #b10500;
  --black: #111111;
  --max: 1080px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "PingFang SC", "Hiragino Sans GB", "Noto Sans SC", "Microsoft YaHei", sans-serif;
  line-height: 1.65;
}
a { color: inherit; }
img { max-width: 100%; display: block; }

.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

.topbar {
  background: var(--red);
  color: #fff;
  font-size: 13px;
  letter-spacing: 0.04em;
}
.topbar .wrap { display: flex; justify-content: space-between; gap: 16px; padding: 8px 0; }
.topbar a { color: #fff; text-decoration: none; }

header.site {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(246, 244, 241, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}
header.site .wrap {
  display: flex;
  align-items: center;
  gap: 20px;
  min-height: 68px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
}
.brand img {
  width: 36px;
  height: 36px;
  object-fit: cover;
  object-position: top;
  border-radius: 8px;
  background: #000;
}
nav.links { display: flex; gap: 22px; margin-left: auto; font-size: 15px; }
nav.links a { text-decoration: none; }
nav.links a:hover { color: var(--red); }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 650;
}
.btn-red { background: var(--red); color: #fff; }
.btn-red:hover { background: var(--red-dark); }
.btn-ghost { border: 1px solid var(--ink); }

.hero { padding: 64px 0 28px; }
.hero-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 36px;
  align-items: center;
}
.kicker {
  color: var(--red);
  font-weight: 700;
  letter-spacing: 0.14em;
  font-size: 13px;
}
h1 {
  margin: 10px 0 12px;
  font-size: clamp(36px, 5vw, 58px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}
.lead { font-size: 18px; color: var(--muted); max-width: 38em; }
.actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.logo-panel {
  background: var(--black);
  border-radius: 28px;
  padding: 28px 28px 8px;
  box-shadow: 0 24px 50px rgba(17, 17, 17, 0.16);
}
.logo-panel img { width: min(280px, 100%); margin: 0 auto; }

.section { padding: 28px 0 10px; }
h2 { font-size: 28px; letter-spacing: -0.02em; margin: 0 0 8px; }
.sub { color: var(--muted); margin: 0 0 22px; }

.cards {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px 18px 16px;
  min-height: 180px;
}
.card .num {
  color: var(--red);
  font-weight: 800;
  font-variant-numeric: tabular-nums;
}
.card h3 { margin: 10px 0 6px; font-size: 20px; }
.card p { margin: 0; color: var(--muted); font-size: 14px; }

.steps {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 14px;
  margin: 8px 0 40px;
}
.step {
  padding: 20px;
  border-top: 3px solid var(--red);
  background: #fff;
}
.step strong { display: block; margin-bottom: 6px; }

.doc { padding: 36px 0 64px; }
.doc-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 32px 36px 40px;
}
.doc h1 { font-size: clamp(32px, 4vw, 44px); }
.doc h2 { margin-top: 28px; font-size: 20px; }
.doc p, .doc li { color: #292524; }
.doc ul { padding-left: 1.2em; }
.meta { color: var(--muted); font-size: 14px; }

.faq { display: grid; gap: 12px; }
.faq article {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 16px 18px;
}
.faq h3 { margin: 0 0 6px; font-size: 16px; }
.faq p { margin: 0; color: var(--muted); }

footer.site {
  margin-top: 20px;
  background: var(--black);
  color: #d6d3d1;
  padding: 36px 0 28px;
  font-size: 14px;
}
footer.site a { color: #fff; }
footer.site .wrap { display: grid; gap: 10px; }
footer.site nav { display: flex; flex-wrap: wrap; gap: 16px; }
.legal-name { color: #a8a29e; }

@media (max-width: 860px) {
  .hero-grid, .cards, .steps { grid-template-columns: 1fr; }
  nav.links { display: none; }
  header.site .btn { margin-left: auto; }
  .doc-card { padding: 22px 18px 28px; }
  .hero { padding-top: 36px; }
}