:root {
  --ink: #1d2733;
  --sub: #5a6675;
  --line: #d9dee5;
  --bg: #f6f7f9;
  --card: #ffffff;
  --accent: #16365c;
  --accent-soft: #e8eef6;
}
* { box-sizing: border-box; }
body { margin: 0; background: var(--bg); color: var(--ink);
  font: 16px/1.75 "Hiragino Sans", "Yu Gothic UI", "Meiryo", system-ui, sans-serif; }
a { color: var(--accent); }
.top { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; padding: 14px 20px;
  background: var(--card); border-bottom: 1px solid var(--line); }
.brand { font-weight: 700; font-size: 18px; text-decoration: none; color: var(--accent); }
.top nav { display: flex; flex-wrap: wrap; gap: 4px 16px; font-size: 14px; }
.top nav a { text-decoration: none; color: var(--sub); }
.top nav a:hover { color: var(--accent); }
main { max-width: 860px; margin: 0 auto; padding: 24px 16px 48px; }
h1 { font-size: 28px; line-height: 1.4; margin: 12px 0 8px; }
h2 { font-size: 21px; margin: 36px 0 10px; padding-bottom: 6px; border-bottom: 2px solid var(--line); }
h3 { font-size: 17px; margin: 22px 0 6px; }
.lead { font-size: 17px; color: var(--sub); }
.hero { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 24px; }
.btn { display: inline-block; background: var(--accent); color: #fff; text-decoration: none; padding: 10px 18px;
  border-radius: 8px; font-weight: 600; margin: 6px 8px 0 0; border: 0; font-size: 16px; cursor: pointer; }
.btn.ghost { background: var(--accent-soft); color: var(--accent); }
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 12px; }
.card { background: var(--card); border: 1px solid var(--line); border-radius: 10px; padding: 14px 16px; }
.card h3 { margin-top: 0; }
.steps { counter-reset: s; list-style: none; padding: 0; }
.steps li { counter-increment: s; background: var(--card); border: 1px solid var(--line); border-radius: 10px;
  padding: 12px 16px 12px 56px; margin: 0 0 10px; position: relative; }
.steps li::before { content: counter(s); position: absolute; left: 14px; top: 12px; width: 28px; height: 28px;
  border-radius: 50%; background: var(--accent); color: #fff; text-align: center; line-height: 28px; font-weight: 700; }
table { border-collapse: collapse; width: 100%; background: var(--card); font-size: 15px; }
th, td { border: 1px solid var(--line); padding: 8px 10px; text-align: left; vertical-align: top; }
th { background: var(--accent-soft); width: 30%; }
.note { font-size: 14px; color: var(--sub); }
form .field { margin: 0 0 16px; }
form label.t { display: block; font-weight: 600; margin-bottom: 4px; }
input[type=text], input[type=email], input[type=datetime-local], select, textarea {
  width: 100%; padding: 9px 10px; border: 1px solid var(--line); border-radius: 8px; font: inherit; background: #fff; }
.check { display: flex; gap: 8px; align-items: flex-start; font-size: 15px; }
.msg { padding: 12px 14px; border-radius: 8px; margin-top: 12px; display: none; }
.msg.ok { display: block; background: #e7f5ec; color: #1e5b33; }
.msg.err { display: block; background: #fdecec; color: #8a1f1f; }
.foot { max-width: 860px; margin: 0 auto; padding: 20px 16px 40px; font-size: 12.5px; color: var(--sub);
  border-top: 1px solid var(--line); }
.foot p { margin: 6px 0; }
@media (max-width: 600px) { h1 { font-size: 23px; } .hero { padding: 18px; } th { width: 38%; } }