:root {
  --bg: #07152e;
  --bg-elevated: rgba(10, 28, 56, 0.82);
  --bg-soft: rgba(15, 40, 78, 0.62);
  --surface-border: rgba(255, 255, 255, 0.1);
  --text: #f7f5ef;
  --text-muted: rgba(247, 245, 239, 0.74);
  --accent: #f7d269;
  --accent-strong: #ffeb99;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.35);
  --radius-xl: 28px;
  --radius-lg: 22px;
  --radius-md: 16px;
  --max-width: 1080px;
}

* {
  box-sizing: border-box;
}

html {
  color-scheme: dark;
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "SF Pro Text", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", sans-serif;
  background:
    radial-gradient(circle at top, rgba(79, 131, 227, 0.35), transparent 36%),
    linear-gradient(180deg, #102a57 0%, var(--bg) 58%, #050d1a 100%);
  color: var(--text);
}

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

img {
  max-width: 100%;
  display: block;
}

.page-shell {
  width: min(calc(100% - 32px), var(--max-width));
  margin: 0 auto;
  padding: 32px 0 72px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 36px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
}

.brand-mark {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.24);
}

.brand-copy strong {
  display: block;
  font-size: 1rem;
  letter-spacing: 0.08em;
}

.brand-copy span {
  color: var(--text-muted);
  font-size: 0.92rem;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.nav-links a {
  padding: 10px 14px;
  border-radius: 999px;
  border: 1px solid var(--surface-border);
  background: rgba(255, 255, 255, 0.03);
  color: var(--text-muted);
  transition: transform 0.18s ease, border-color 0.18s ease, color 0.18s ease;
}

.nav-links a:hover,
.nav-links a:focus-visible,
.nav-links a.is-active {
  color: var(--text);
  border-color: rgba(247, 210, 105, 0.35);
  transform: translateY(-1px);
}

.hero,
.panel {
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  background: linear-gradient(180deg, rgba(12, 31, 60, 0.92), rgba(7, 20, 39, 0.88));
  border: 1px solid var(--surface-border);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
}

.hero {
  padding: clamp(28px, 4vw, 48px);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(240px, 0.8fr);
  gap: 28px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(247, 210, 105, 0.12);
  color: var(--accent-strong);
  font-size: 0.9rem;
  letter-spacing: 0.04em;
}

.hero h1,
.content h1,
.content h2,
.content h3 {
  font-family: "Iowan Old Style", "Baskerville", "Songti SC", serif;
  letter-spacing: 0.01em;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5.2rem);
  line-height: 0.96;
  margin: 18px 0 16px;
}

.hero p,
.lede {
  margin: 0;
  max-width: 44rem;
  color: var(--text-muted);
  font-size: 1.06rem;
  line-height: 1.8;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 50px;
  padding: 0 18px;
  border-radius: 999px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
}

.button-primary {
  background: linear-gradient(135deg, #f4dc86, #d7a737);
  color: #16284b;
  box-shadow: 0 14px 30px rgba(215, 167, 55, 0.24);
}

.button-secondary {
  border-color: var(--surface-border);
  background: rgba(255, 255, 255, 0.04);
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.hero-card {
  padding: 22px;
  border-radius: var(--radius-lg);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.025));
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero-card img {
  width: min(220px, 100%);
  margin: 0 auto 20px;
  border-radius: 28px;
}

.hero-card dl {
  margin: 0;
  display: grid;
  gap: 14px;
}

.hero-card dt {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-bottom: 4px;
}

.hero-card dd {
  margin: 0;
  font-size: 1rem;
}

.layout {
  display: grid;
  gap: 24px;
  margin-top: 28px;
}

.grid-2 {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.panel {
  padding: 26px;
}

.panel h2 {
  margin: 0 0 12px;
  font-size: 1.8rem;
}

.panel h3 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

.panel p,
.panel li,
.content p,
.content li {
  color: var(--text-muted);
  line-height: 1.8;
}

.panel ul,
.content ul {
  margin: 0;
  padding-left: 1.2rem;
}

.highlight {
  border: 1px solid rgba(247, 210, 105, 0.22);
  background: rgba(247, 210, 105, 0.08);
}

.placeholder {
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px dashed rgba(247, 210, 105, 0.35);
  background: rgba(247, 210, 105, 0.08);
}

.placeholder strong {
  color: var(--accent-strong);
}

.content {
  display: grid;
  gap: 20px;
}

.content section {
  padding: 26px;
  border-radius: var(--radius-xl);
  border: 1px solid var(--surface-border);
  background: rgba(5, 15, 31, 0.52);
}

.content h1 {
  margin: 0 0 10px;
  font-size: clamp(2.1rem, 5vw, 3.6rem);
}

.content h2 {
  margin: 0 0 12px;
  font-size: 1.6rem;
}

.content h3 {
  margin: 24px 0 8px;
  font-size: 1.16rem;
}

.content code,
.pill {
  display: inline-flex;
  align-items: center;
  padding: 6px 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.08);
  color: var(--text);
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
}

.faq-item {
  padding: 20px;
  border-radius: var(--radius-lg);
  background: var(--bg-soft);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.faq-item h3 {
  margin-top: 0;
}

.footer {
  margin-top: 32px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.94rem;
}

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

@media (max-width: 820px) {
  .hero-grid,
  .grid-2,
  .faq-grid {
    grid-template-columns: 1fr;
  }

  .topbar,
  .footer {
    flex-direction: column;
    align-items: flex-start;
  }

  .page-shell {
    width: min(calc(100% - 24px), var(--max-width));
    padding-top: 20px;
  }
}