* { box-sizing: border-box; }
body { margin: 0; background: #fff; color: #1f2a33; font: 16px/1.55 system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif; }
header { background: #1d3b53; color: #fff; padding: 18px 16px 0; }
header .in, main, footer { max-width: 760px; margin: 0 auto; }
header .site { font-size: 20px; font-weight: 600; }
header .site a { color: #fff; text-decoration: none; }
header .sub { color: #a9c1d3; font-size: 14px; margin: 2px 0 12px; }
nav { display: flex; flex-wrap: wrap; gap: 4px; }
nav a, nav b { padding: 8px 14px; font-size: 15px; border-radius: 6px 6px 0 0; }
nav a { color: #d6e4ee; text-decoration: none; }
nav a:hover { background: #2a4f6c; }
nav b { background: #fff; color: #1d3b53; font-weight: 600; }
main { padding: 22px 16px 10px; }
h1 { font-size: 26px; line-height: 1.25; margin: 0 0 14px; color: #1d3b53; }
h2 { font-size: 19px; margin: 26px 0 8px; color: #1d3b53; }
a { color: #1f6f9f; }
table { border-collapse: collapse; width: 100%; margin: 10px 0 18px; font-size: 15px; }
th, td { text-align: left; padding: 8px 10px; border-bottom: 1px solid #dde5eb; vertical-align: top; }
th { background: #eef3f7; font-weight: 600; }
.note { background: #f4f8fb; border-left: 4px solid #1f6f9f; padding: 10px 14px; margin: 18px 0; font-size: 15px; }
ol.st { padding-left: 22px; }
ol.st li { margin-bottom: 10px; }
footer { padding: 14px 16px 30px; font-size: 13px; color: #7a8a96; border-top: 1px solid #e3e9ee; }