:root {
  color-scheme: light;
  --ink: #17204a;
  --muted: #5d668b;
  --accent: #5258e8;
  --accent-soft: #eef0ff;
  --line: #dfe3f4;
  --surface: rgba(255, 255, 255, 0.88);
  --page: #f7f8ff;
  --shadow: 0 24px 70px rgba(56, 64, 142, 0.14);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  background:
    radial-gradient(circle at 12% 5%, rgba(134, 143, 255, 0.22), transparent 30rem),
    radial-gradient(circle at 92% 25%, rgba(98, 215, 255, 0.16), transparent 26rem),
    var(--page);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.6;
}

a {
  color: var(--accent);
}

.shell {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
}

header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 28px 0;
}

.brand {
  color: var(--ink);
  font-weight: 750;
  letter-spacing: -0.02em;
  text-decoration: none;
}

nav {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  font-size: 0.95rem;
}

nav a {
  color: var(--muted);
  text-decoration: none;
}

nav a:hover,
nav a:focus-visible {
  color: var(--accent);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.25fr) minmax(270px, 0.75fr);
  gap: 48px;
  align-items: center;
  padding: 92px 0 116px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--accent);
  font-size: 0.82rem;
  font-weight: 750;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  line-height: 1.12;
  letter-spacing: -0.035em;
}

h1 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(3rem, 7.4vw, 6.2rem);
}

h2 {
  margin: 0 0 20px;
  font-size: clamp(2rem, 4vw, 3.25rem);
}

h3 {
  margin: 0 0 10px;
  font-size: 1.25rem;
}

.lead {
  max-width: 680px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.28rem);
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid var(--accent);
  border-radius: 999px;
  color: white;
  background: var(--accent);
  font-weight: 700;
  text-decoration: none;
}

.button.secondary {
  color: var(--accent);
  background: transparent;
}

.route-card {
  position: relative;
  min-height: 380px;
  border: 1px solid rgba(118, 126, 205, 0.22);
  border-radius: 42px;
  background: linear-gradient(145deg, rgba(255, 255, 255, 0.98), rgba(235, 239, 255, 0.88));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.route-card::before {
  content: "";
  position: absolute;
  inset: 30px;
  border-radius: 30px;
  background:
    linear-gradient(120deg, transparent 35%, rgba(82, 88, 232, 0.15) 36%, transparent 38%),
    linear-gradient(25deg, transparent 58%, rgba(79, 196, 229, 0.18) 59%, transparent 61%);
}

.route-line {
  position: absolute;
  top: 90px;
  left: 50%;
  width: 7px;
  height: 205px;
  border-radius: 999px;
  background: linear-gradient(var(--accent), #4cc7e5);
  transform: rotate(18deg);
  box-shadow: 0 0 28px rgba(82, 88, 232, 0.36);
}

.route-dot {
  position: absolute;
  left: calc(50% - 21px);
  width: 42px;
  height: 42px;
  border: 9px solid white;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 10px 28px rgba(82, 88, 232, 0.28);
}

.route-dot.start {
  top: 54px;
}

.route-dot.end {
  bottom: 45px;
  background: #28b8dc;
}

.section {
  padding: 84px 0;
}

.section-intro {
  max-width: 720px;
  margin-bottom: 36px;
  color: var(--muted);
}

.grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.card,
.document {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--surface);
  box-shadow: 0 14px 42px rgba(56, 64, 142, 0.08);
}

.card {
  padding: 28px;
}

.card p,
.document p,
.document li {
  color: var(--muted);
}

.document {
  max-width: 840px;
  margin: 52px auto 96px;
  padding: clamp(28px, 6vw, 68px);
}

.document h1 {
  font-size: clamp(2.6rem, 6vw, 4.8rem);
}

.document h2 {
  margin-top: 46px;
  font-size: 1.65rem;
}

.meta {
  margin-top: 16px;
  color: var(--muted);
  font-size: 0.95rem;
}

.notice {
  margin: 32px 0;
  padding: 20px 22px;
  border-left: 4px solid var(--accent);
  border-radius: 0 16px 16px 0;
  background: var(--accent-soft);
}

footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 16px;
  padding: 36px 0 54px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

footer p {
  margin: 0;
}

@media (max-width: 760px) {
  .hero {
    grid-template-columns: 1fr;
    padding: 58px 0 78px;
  }

  .route-card {
    min-height: 300px;
  }

  .grid {
    grid-template-columns: 1fr;
  }

  header {
    align-items: flex-start;
    flex-direction: column;
  }
}