:root { --ink:#1a2332; --ink2:#4b5a6e; --accent:#1d4ed8; --bg:#f7f8fa; --card:#ffffff; --hair:#e3e7ee; }
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body { background: var(--bg); color: var(--ink); font: 16px/1.65 -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; }
a { color: var(--accent); }
.site-header { background: var(--card); border-bottom: 1px solid var(--hair); }
.site-header .wrap { max-width: 760px; margin: 0 auto; padding: 14px 20px 0; }
.brand { font-size: 20px; font-weight: 700; color: var(--ink); text-decoration: none; display: inline-block; padding-bottom: 10px; }
.brand span { color: var(--accent); }
nav.site-nav { display: flex; flex-wrap: wrap; gap: 18px; }
nav.site-nav a { padding: 8px 0 12px; color: var(--ink2); text-decoration: none; font-size: 15px; }
nav.site-nav a:hover { color: var(--ink); }
nav.site-nav a[aria-current="page"] { color: var(--ink); font-weight: 600; box-shadow: inset 0 -2px 0 var(--accent); }
main { max-width: 760px; margin: 0 auto; padding: 24px 20px 40px; }
.card { background: var(--card); border: 1px solid var(--hair); border-radius: 10px; padding: 24px; margin-bottom: 20px; }
h1 { font-size: 26px; line-height: 1.3; margin: 0 0 12px; }
h2 { font-size: 20px; margin: 26px 0 8px; }
h3 { font-size: 17px; margin: 22px 0 6px; }
p { margin: 0 0 14px; }
ul, ol { margin: 0 0 14px; padding-left: 22px; }
li { margin-bottom: 6px; }
.label { font-size: 12px; font-weight: 700; letter-spacing: .08em; text-transform: uppercase; color: var(--ink2); margin-bottom: 8px; }
.hero { width: 100%; border-radius: 8px; margin: 8px 0 6px; }
.caption { font-size: 13px; color: var(--ink2); margin-bottom: 0; }
.note { background: #eef4ff; border: 1px solid #cfdefc; border-radius: 8px; padding: 14px 16px; margin: 0 0 14px; }
.note strong { display: block; margin-bottom: 4px; }
.guide-list { list-style: none; padding: 0; margin: 0 0 14px; }
.guide-list li { border: 1px solid var(--hair); border-radius: 8px; padding: 14px 16px; margin-bottom: 10px; }
.guide-list .num { display: inline-block; min-width: 26px; height: 26px; line-height: 26px; text-align: center; background: var(--accent); color: #fff; border-radius: 50%; font-size: 14px; font-weight: 700; margin-right: 10px; }
.guide-list .detail { display: block; color: var(--ink2); font-size: 14px; margin: 6px 0 0 36px; }
.btn { display: inline-block; background: var(--card); border: 1px solid var(--accent); color: var(--accent); border-radius: 8px; padding: 8px 16px; text-decoration: none; font-size: 15px; font-weight: 600; }
.btn:hover { background: var(--accent); color: #fff; }
footer.site-footer { border-top: 1px solid var(--hair); color: var(--ink2); font-size: 13px; }
footer.site-footer .wrap { max-width: 760px; margin: 0 auto; padding: 18px 20px 28px; }
@media (max-width: 600px) {
  nav.site-nav a { min-height: 44px; display: inline-flex; align-items: center; }
  .card { padding: 18px; }
  h1 { font-size: 22px; }
}