:root {
  --bg: #07090c;
  --bg-raise: #10151b;
  --bg-card: #161c24;
  --line: rgba(85, 112, 135, 0.35);
  --ink: #e7eef3;
  --muted: #a7b4c0;
  --slate: #55708a;
  --slate-deep: #3e5870;
  --slate-light: #8eabbf;
  --peak: #c5d4e0;
  --max: 1120px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: "Avenir Next", "Segoe UI", "Helvetica Neue", "PingFang SC", "Noto Sans SC", sans-serif;
  font-size: 17px;
  line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: var(--slate-light); text-decoration: none; }
a:hover { color: var(--peak); }
.wrap { width: min(var(--max), calc(100% - 40px)); margin: 0 auto; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(7, 9, 12, 0.92);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(10px);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  min-height: 152px;
}
.brand { display: flex; align-items: center; }
.brand img {
  height: 128px;
  width: auto;
  background: #000;
}
.nav { display: flex; gap: 22px; align-items: center; }
.nav a { color: var(--peak); font-size: 14px; letter-spacing: 0.08em; text-transform: uppercase; }
.nav-toggle { display: none; }
.menu-btn {
  display: none;
  background: transparent;
  color: var(--peak);
  border: 1px solid var(--line);
  padding: 8px 12px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 12px;
}

.hero {
  position: relative;
  padding: 88px 0 72px;
  background:
    radial-gradient(900px 420px at 80% -10%, rgba(85, 112, 135, 0.28), transparent 60%),
    linear-gradient(180deg, #0c1218 0%, var(--bg) 100%);
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.hero::after {
  content: "";
  position: absolute;
  right: -80px;
  bottom: -40px;
  width: 420px;
  height: 180px;
  background:
    linear-gradient(135deg, transparent 48%, rgba(85, 112, 135, 0.55) 50%, transparent 52%),
    linear-gradient(118deg, transparent 42%, rgba(142, 171, 191, 0.35) 44%, transparent 46%);
  pointer-events: none;
}
.kicker {
  color: var(--slate-light);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  font-size: 12px;
  margin: 0 0 16px;
}
h1 {
  font-size: clamp(40px, 6vw, 68px);
  line-height: 1.05;
  font-weight: 650;
  letter-spacing: -0.03em;
  margin: 0 0 18px;
  max-width: 14ch;
}
.lede { max-width: 62ch; color: var(--muted); font-size: 19px; margin: 0 0 28px; }
.actions { display: flex; gap: 12px; flex-wrap: wrap; }
.btn {
  display: inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid transparent;
  font-size: 15px;
}
.btn-primary { background: var(--slate); color: #f4f8fb; }
.btn-primary:hover { background: var(--slate-deep); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--peak); }
.btn-ghost:hover { border-color: var(--slate-light); color: #fff; }

section { padding: 76px 0; }
.band { background: var(--bg-raise); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }
h2 {
  font-size: clamp(28px, 3vw, 40px);
  line-height: 1.15;
  letter-spacing: -0.02em;
  margin: 0 0 12px;
}
.section-intro { max-width: 68ch; color: var(--muted); margin: 0 0 32px; }

.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.card {
  background: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px 26px 24px;
}
.card h3 { margin: 0 0 10px; font-size: 22px; }
.card p { margin: 0 0 12px; color: var(--muted); }
.card ul { margin: 0; padding-left: 18px; color: var(--peak); }
.card li { margin: 6px 0; }
.eyebrow {
  color: var(--slate-light);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  margin: 0 0 8px;
}

.chips { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 8px; }
.chip {
  border: 1px solid var(--line);
  background: #0d1218;
  color: var(--peak);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 14px;
}
.grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
.grid article {
  padding: 22px 20px;
  border-radius: 16px;
  background: #0d1218;
  border: 1px solid var(--line);
}
.grid h3 { margin: 0 0 8px; font-size: 18px; }
.grid p { margin: 0; color: var(--muted); font-size: 15px; }

.verts { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.verts span {
  display: block;
  padding: 18px 16px;
  background: var(--bg-card);
  border-left: 3px solid var(--slate);
  color: var(--peak);
}

.about-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 28px; align-items: start; }
.about-mark {
  background: #000;
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 18px;
}
.about-mark img { width: 100%; height: auto; }

form { display: grid; gap: 12px; }
label { display: grid; gap: 6px; font-size: 14px; color: var(--peak); }
input, textarea {
  width: 100%;
  background: #0c1116;
  color: var(--ink);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px 12px;
  font: inherit;
}
textarea { min-height: 120px; resize: vertical; }
.note { color: var(--muted); font-size: 14px; }
.form-status { min-height: 1.4em; color: var(--slate-light); margin: 0; }

footer {
  border-top: 1px solid var(--line);
  padding: 28px 0 40px;
  color: var(--muted);
  font-size: 14px;
}
.foot { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }

@media (max-width: 860px) {
  .split, .grid, .verts, .about-grid { grid-template-columns: 1fr; }
  .menu-btn { display: inline-block; }
  .nav {
    display: none;
    position: absolute;
    left: 0; right: 0;
    top: 152px;
    background: #0c1116;
    border-bottom: 1px solid var(--line);
    flex-direction: column;
    align-items: flex-start;
    padding: 12px 20px 18px;
  }
  .nav-toggle:checked ~ .nav { display: flex; }
  .header-inner { position: relative; }
}