:root {
  color-scheme: light;
  --blue: #1677ff;
  --green: #12c99b;
  --orange: #ff9f0a;
  --ink: #111827;
  --muted: #64748b;
  --line: #dce6f3;
  --bg: #f7fbff;
}
* { box-sizing: border-box; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Segoe UI", sans-serif;
  background: radial-gradient(circle at 80% 0%, rgba(255, 209, 102, .28), transparent 32%),
    radial-gradient(circle at 10% 100%, rgba(22, 119, 255, .16), transparent 30%),
    var(--bg);
  color: var(--ink);
  line-height: 1.68;
}
.site-header {
  position: sticky;
  top: 0;
  z-index: 3;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 18px clamp(20px, 6vw, 88px);
  background: rgba(255,255,255,.86);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(18px);
}
.brand { display: inline-flex; align-items: center; gap: 12px; color: inherit; text-decoration: none; }
.brand-mark {
  width: 44px; height: 44px; border-radius: 14px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--blue), #62b8ff); color: white; font-weight: 800;
}
.brand strong { display: block; font-size: 20px; }
.brand small { display: block; color: var(--muted); font-size: 13px; }
nav { display: flex; gap: 18px; flex-wrap: wrap; }
nav a { color: #334155; text-decoration: none; font-weight: 650; }
main { width: min(1120px, calc(100% - 40px)); margin: 0 auto; padding: 56px 0 80px; }
.hero {
  padding: clamp(42px, 8vw, 92px) 0;
}
.eyebrow { color: var(--blue); font-weight: 800; letter-spacing: .04em; text-transform: uppercase; }
h1 { margin: 12px 0 18px; font-size: clamp(42px, 7vw, 82px); line-height: 1.05; letter-spacing: 0; }
h2 { margin: 42px 0 14px; font-size: clamp(28px, 4vw, 42px); line-height: 1.18; }
h3 { margin: 28px 0 10px; font-size: 24px; }
p, li { color: #334155; font-size: 18px; }
.lead { max-width: 760px; color: var(--muted); font-size: 22px; }
.grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 18px; }
.card {
  border: 1px solid var(--line);
  border-radius: 22px;
  background: rgba(255,255,255,.9);
  padding: 26px;
  box-shadow: 0 16px 44px rgba(44, 77, 122, .08);
}
.card strong { font-size: 22px; display: block; margin-bottom: 8px; }
.notice { border-left: 5px solid var(--orange); background: rgba(255, 159, 10, .1); padding: 18px 22px; border-radius: 16px; }
table { width: 100%; border-collapse: collapse; background: white; border: 1px solid var(--line); border-radius: 18px; overflow: hidden; }
th, td { text-align: left; padding: 16px 18px; border-bottom: 1px solid var(--line); vertical-align: top; }
th { background: #f1f7ff; color: #0f172a; }
.button-row { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 26px; }
.button {
  display: inline-flex; align-items: center; justify-content: center; min-height: 48px; padding: 0 22px;
  border-radius: 16px; background: var(--blue); color: white; text-decoration: none; font-weight: 800;
}
.button.secondary { background: white; color: var(--blue); border: 1px solid #bcd7ff; }
footer {
  display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap;
  padding: 28px clamp(20px, 6vw, 88px); border-top: 1px solid var(--line); color: var(--muted);
  background: white;
}
@media (max-width: 820px) {
  .site-header { align-items: flex-start; flex-direction: column; }
  .grid { grid-template-columns: 1fr; }
  h1 { font-size: 44px; }
}