:root {
  --bg: #0a0f1d;
  --surface-light: #19233c;
  --text: #f1f3f9;
  --muted: #9aa6bd;
  --gold: #e2b04c;
  --blue: #2a6df5;
  --green: #4ecb8d;
  --border: rgba(255, 255, 255, 0.09);
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.24);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica,
    Arial, sans-serif;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.container {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.top-note {
  padding: 9px 20px;
  border-bottom: 1px solid var(--border);
  background: #060912;
  color: var(--muted);
  font-size: 13px;
  text-align: center;
}

header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid var(--border);
  background: rgba(10, 15, 29, 0.92);
  backdrop-filter: blur(16px);
}

.header-inner {
  min-height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  font-size: 19px;
  font-weight: 800;
}

.brand span {
  color: var(--gold);
}

.back-link {
  color: var(--muted);
  font-size: 14px;
  transition: color 0.2s;
}

.back-link:hover {
  color: var(--text);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  background:
    radial-gradient(circle at 15% 20%, rgba(42, 109, 245, 0.2), transparent 36%),
    radial-gradient(circle at 85% 0%, rgba(226, 176, 76, 0.14), transparent 30%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 60px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 16px;
  color: var(--gold);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-logo {
  display: block;
  width: auto;
  height: 48px;
  max-width: 260px;
  object-fit: contain;
  object-position: left center;
  margin-bottom: 22px;
}

h1 {
  max-width: 760px;
  margin-bottom: 18px;
  font-size: clamp(34px, 5vw, 54px);
  line-height: 1.08;
  letter-spacing: -0.035em;
}

.lead {
  max-width: 720px;
  color: var(--muted);
  font-size: 18px;
}

.hero-card,
.content-card,
.sidebar-card {
  border: 1px solid var(--border);
  background: rgba(19, 26, 46, 0.88);
  box-shadow: var(--shadow);
}

.hero-card {
  padding: 24px;
  border-radius: 16px;
}

.hero-card h2 {
  margin-bottom: 16px;
  font-size: 17px;
}

.quick-facts {
  display: grid;
  gap: 12px;
}

.quick-fact {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
}

.quick-fact:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.quick-fact span {
  color: var(--muted);
}

.quick-fact strong {
  text-align: right;
}

.notice {
  padding: 18px 0;
  border-bottom: 1px solid var(--border);
  background: rgba(226, 176, 76, 0.055);
  color: #d7c9aa;
  font-size: 14px;
}

.layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 36px;
  padding: 56px 0 76px;
  align-items: start;
}

.main-content {
  display: grid;
  gap: 24px;
}

.content-card {
  padding: 32px;
  border-radius: 16px;
  box-shadow: none;
}

.content-card h2 {
  margin-bottom: 16px;
  font-size: 25px;
  line-height: 1.25;
}

.content-card h3 {
  margin: 22px 0 8px;
  font-size: 18px;
}

.content-card p {
  margin-bottom: 14px;
  color: var(--muted);
}

.content-card p:last-child {
  margin-bottom: 0;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  margin-top: 20px;
}

.feature {
  padding: 18px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-light);
}

.feature strong {
  display: block;
  margin-bottom: 5px;
  font-size: 15px;
}

.feature p {
  margin: 0;
  font-size: 14px;
}

.check-list {
  display: grid;
  gap: 11px;
  list-style: none;
}

.check-list li {
  position: relative;
  padding-left: 28px;
  color: var(--muted);
}

.check-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: var(--green);
  font-weight: 800;
}

.steps {
  display: grid;
  gap: 14px;
  counter-reset: steps;
}

.step {
  position: relative;
  padding: 16px 16px 16px 56px;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--muted);
  counter-increment: steps;
}

.step::before {
  content: counter(steps);
  position: absolute;
  top: 15px;
  left: 16px;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(42, 109, 245, 0.18);
  color: #8cb2ff;
  font-size: 13px;
  font-weight: 800;
}

.sidebar {
  position: sticky;
  top: 92px;
  display: grid;
  gap: 18px;
}

.sidebar-card {
  padding: 22px;
  border-radius: 14px;
  box-shadow: none;
}

.sidebar-card h3 {
  margin-bottom: 12px;
  font-size: 17px;
}

.sidebar-card p {
  color: var(--muted);
  font-size: 14px;
}

.toc {
  display: grid;
  list-style: none;
}

.toc a {
  display: block;
  padding: 9px 0;
  border-bottom: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.toc li:last-child a {
  border-bottom: 0;
}

.toc a:hover {
  color: var(--text);
}

.btn {
  width: 100%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  margin-top: 16px;
  padding: 12px 18px;
  border-radius: 9px;
  background: var(--blue);
  color: white;
  font-size: 14px;
  font-weight: 700;
  transition: background 0.2s, transform 0.2s;
}

.btn:hover {
  background: #4382ff;
  transform: translateY(-1px);
}

.faq details {
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}

.faq details:first-of-type {
  padding-top: 0;
}

.faq details:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.faq summary {
  cursor: pointer;
  font-weight: 700;
  list-style-position: inside;
}

.faq details p {
  margin: 10px 0 0;
  padding-left: 20px;
}

footer {
  padding: 38px 0;
  border-top: 1px solid var(--border);
  background: #060912;
  color: var(--muted);
  font-size: 13px;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 28px;
}

.footer-inner p {
  max-width: 720px;
}

.age {
  flex: 0 0 auto;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  border: 2px solid #d45b5b;
  border-radius: 50%;
  color: #ff8f8f;
  font-weight: 800;
}

@media (max-width: 900px) {
  .hero-grid,
  .layout {
    grid-template-columns: 1fr;
  }

  .hero-card {
    max-width: 520px;
  }

  .sidebar {
    position: static;
    grid-row: 1;
  }

  .sidebar-card:first-child {
    display: none;
  }
}

@media (max-width: 620px) {
  .container {
    width: min(100% - 28px, 1120px);
  }

  .header-inner {
    min-height: 60px;
  }

  .brand {
    font-size: 16px;
  }

  .hero {
    padding: 52px 0 42px;
  }

  .hero-logo {
    height: 40px;
  }

  .lead {
    font-size: 16px;
  }

  .layout {
    padding: 36px 0 52px;
  }

  .content-card {
    padding: 23px;
  }

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

  .footer-inner {
    flex-direction: column;
  }
}