:root {
  --steel: #5A7D8F;
  --teal: #7BA3B4;
  --mint: #C2DDE2;
  --seafoam: #D8ECEE;
  --text: #2C3E50;
  --body: #4A5568;
  --bg: #F7FAFC;
  --card: #FFFFFF;
  --border: rgba(90, 125, 143, 0.15);
  --radius: 16px;
  --shadow: 0 4px 24px rgba(90, 125, 143, 0.08);
}

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

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Text", "Segoe UI", sans-serif;
  color: var(--body);
  background: linear-gradient(180deg, var(--seafoam) 0%, var(--bg) 400px, var(--bg) 100%);
  min-height: 100vh;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

header {
  padding: 48px 24px 32px;
  max-width: 960px;
  margin: 0 auto;
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: var(--text);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.2px;
}

.logo-mark {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--steel), var(--teal));
  color: white;
  border-radius: 12px;
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", sans-serif;
  font-weight: 800;
  font-size: 16px;
  letter-spacing: 0;
}

nav { margin-left: auto; }

nav a {
  color: var(--body);
  text-decoration: none;
  font-size: 15px;
  margin-left: 24px;
  font-weight: 500;
  transition: color .2s;
}

nav a:hover { color: var(--steel); }

.header-inner { display: flex; align-items: center; flex-wrap: wrap; gap: 16px; }

main {
  max-width: 820px;
  margin: 0 auto;
  padding: 16px 24px 80px;
}

h1 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", sans-serif;
  color: var(--text);
  font-size: 44px;
  font-weight: 800;
  letter-spacing: -0.8px;
  margin-bottom: 12px;
  line-height: 1.1;
}

h2 {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Rounded", sans-serif;
  color: var(--text);
  font-size: 26px;
  font-weight: 700;
  letter-spacing: -0.4px;
  margin: 40px 0 16px;
}

h3 {
  color: var(--text);
  font-size: 17px;
  font-weight: 700;
  margin: 20px 0 6px;
}

p { margin-bottom: 14px; font-size: 16px; }

.lead {
  font-size: 19px;
  color: var(--body);
  margin-bottom: 28px;
  line-height: 1.55;
}

ul, ol { margin: 0 0 16px 22px; }

li { margin-bottom: 6px; }

a { color: var(--steel); text-decoration: none; font-weight: 500; }
a:hover { text-decoration: underline; }

.card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  margin: 20px 0;
}

.card h2 { margin-top: 0; }

.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin: 20px 0;
}

.contact-item {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 20px;
}

.contact-item strong {
  display: block;
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.6px;
  margin-bottom: 6px;
  opacity: 0.7;
}

.contact-item a, .contact-item span { font-size: 16px; color: var(--text); font-weight: 500; }

.faq details {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 18px 22px;
  margin-bottom: 10px;
  transition: box-shadow .2s;
}

.faq details[open] {
  box-shadow: var(--shadow);
}

.faq summary {
  cursor: pointer;
  font-weight: 600;
  font-size: 16px;
  color: var(--text);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.faq summary::after {
  content: '＋';
  color: var(--steel);
  font-weight: 300;
  font-size: 22px;
  line-height: 1;
  transition: transform .2s;
}

.faq details[open] summary::after { content: '−'; }

.faq details > p { margin-top: 12px; color: var(--body); }

footer {
  border-top: 1px solid var(--border);
  padding: 32px 24px;
  color: var(--body);
  font-size: 13px;
}

.footer-inner {
  max-width: 820px;
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 16px 32px;
  justify-content: space-between;
}

.footer-links a { margin-right: 20px; }

.meta {
  color: var(--body);
  opacity: 0.75;
  font-size: 13px;
  margin-top: 28px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #E2E8F0;
    --body: #CBD5E0;
    --bg: #0D1B2A;
    --card: #1B2B3A;
    --border: rgba(255, 255, 255, 0.08);
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
  }
  body {
    background: linear-gradient(180deg, #14243A 0%, var(--bg) 400px);
  }
}