:root {
  --blue: #0165FA;
  --blue-dark: #1558A8;
  --bg: #F7F8FB;
  --text: #1A2233;
  --text-mid: #5B6678;
  --text-light: #8A93A6;
  --border: #E5E9F0;
  --white: #fff;
}
*, *::before, *::after { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
.hero {
  background: linear-gradient(135deg, var(--blue) 0%, var(--blue-dark) 100%);
  color: var(--white);
  padding: 56px 24px 44px;
  text-align: center;
}
.logo {
  width: 76px; height: 76px;
  background: var(--white);
  border-radius: 18px;
  margin: 0 auto 18px;
  display: flex; align-items: center; justify-content: center;
  font-size: 44px; font-weight: 900; color: var(--blue);
  box-shadow: 0 8px 24px rgba(0,0,0,0.15);
}
.hero h1 { margin: 0 0 6px; font-size: 30px; font-weight: 800; letter-spacing: -0.5px; }
.hero p { margin: 0; opacity: 0.92; font-size: 15px; }

nav.tabs {
  display: flex; gap: 8px; justify-content: center; flex-wrap: wrap;
  padding: 20px 16px 0;
}
nav.tabs a {
  background: var(--white);
  border: 1px solid var(--border);
  color: var(--text);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 700;
  text-decoration: none;
}
nav.tabs a.active, nav.tabs a:hover { background: var(--blue); color: var(--white); border-color: var(--blue); }

main {
  max-width: 720px;
  margin: 0 auto;
  padding: 32px 24px 80px;
}
section.card {
  background: var(--white);
  border-radius: 16px;
  padding: 28px 32px;
  margin-bottom: 20px;
  box-shadow: 0 1px 3px rgba(0,0,0,0.04), 0 4px 16px rgba(0,0,0,0.04);
}
h2 {
  margin: 0 0 14px;
  font-size: 20px;
  font-weight: 800;
  color: var(--blue-dark);
  display: flex; align-items: center; gap: 10px;
}
h2::before {
  content: ""; display: inline-block; width: 4px; height: 20px;
  background: var(--blue); border-radius: 2px;
}
h3 { margin: 22px 0 6px; font-size: 15px; font-weight: 700; color: var(--text); }
p { margin: 0 0 12px; color: var(--text-mid); white-space: pre-wrap; }
a { color: var(--blue); text-decoration: none; font-weight: 600; }
a:hover { text-decoration: underline; }
ul { margin: 0 0 12px; padding-left: 22px; color: var(--text-mid); }
ul li { margin-bottom: 4px; }
.updated { color: var(--text-light); font-size: 13px; margin: 0 0 20px; }

details { border-bottom: 1px solid var(--border); padding: 14px 0; }
details:last-of-type { border-bottom: 0; }
summary {
  cursor: pointer; font-weight: 700; color: var(--text); font-size: 15px;
  list-style: none; position: relative; padding-right: 24px;
}
summary::-webkit-details-marker { display: none; }
summary::after {
  content: "+"; position: absolute; right: 0; top: -2px;
  font-size: 22px; color: var(--blue); font-weight: 400; transition: transform .2s;
}
details[open] summary::after { content: "−"; }
details p, details ul { margin-top: 10px; font-size: 14px; }

.contact-card {
  background: linear-gradient(135deg, #EAF1FB 0%, #F7F8FB 100%);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 20px;
  margin-top: 14px;
}
.mail-link {
  display: inline-block;
  background: var(--blue);
  color: var(--white) !important;
  padding: 12px 24px;
  border-radius: 10px;
  margin-top: 8px;
  font-weight: 700;
  text-decoration: none !important;
}
.mail-link:hover { background: var(--blue-dark); }

footer {
  text-align: center;
  padding: 28px 24px 40px;
  color: var(--text-light);
  font-size: 13px;
}
footer a { color: var(--text-light); margin: 0 8px; }

@media (max-width: 480px) {
  .hero { padding: 44px 20px 32px; }
  .hero h1 { font-size: 24px; }
  main { padding: 24px 16px 56px; }
  section.card { padding: 22px 20px; border-radius: 12px; }
}
</content>