:root {
  --bg: #f7f8fb;
  --card: #ffffff;
  --text: #16202a;
  --muted: #5b6673;
  --line: #e6e9ef;
  --brand: #135dff;
  --brand-dark: #0b3fb3;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: Arial, Helvetica, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
}
.header {
  background: linear-gradient(135deg, #0b1f3a, #135dff);
  color: #fff;
  padding: 46px 20px;
}
.header-inner, .container {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
}
.logo {
  font-weight: 800;
  letter-spacing: -0.02em;
  font-size: 28px;
}
.tagline {
  margin-top: 8px;
  color: rgba(255,255,255,.86);
  font-size: 17px;
}
.nav {
  background: #fff;
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  width: min(980px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 14px 0;
}
.nav a {
  color: var(--brand-dark);
  text-decoration: none;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 10px;
}
.nav a:hover { background: #eef4ff; }
.container {
  padding: 32px 0 48px;
}
.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 28px;
  box-shadow: 0 10px 30px rgba(20, 34, 55, 0.06);
}
h1 {
  line-height: 1.18;
  font-size: clamp(30px, 5vw, 46px);
  margin: 0 0 12px;
  letter-spacing: -0.04em;
}
h2 {
  margin-top: 28px;
  margin-bottom: 8px;
  font-size: 22px;
  letter-spacing: -0.02em;
}
h3 { margin-top: 20px; }
p { margin: 10px 0; }
ul { padding-left: 22px; }
li { margin: 7px 0; }
.notice {
  border-left: 4px solid var(--brand);
  background: #eef4ff;
  padding: 14px 16px;
  border-radius: 12px;
  color: #24364f;
  margin: 18px 0;
}
.meta {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 24px;
}
a { color: var(--brand-dark); }
.footer {
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  padding: 24px 20px 36px;
  text-align: center;
}
.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
  gap: 16px;
  margin-top: 22px;
}
.tile {
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 18px;
  background: #fff;
}
.tile h2 { margin-top: 0; }
.button {
  display: inline-block;
  margin-top: 10px;
  background: var(--brand);
  color: white;
  text-decoration: none;
  padding: 10px 14px;
  border-radius: 12px;
  font-weight: 700;
}
.small { font-size: 14px; color: var(--muted); }