* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.75; color: #1a1a1a; background: #fafafa; }
header { background: #fff; border-bottom: 1px solid #e5e5e5; padding: 16px 24px; position: sticky; top: 0; z-index: 10; }
nav { max-width: 820px; margin: 0 auto; display: flex; gap: 18px; flex-wrap: wrap; font-size: 14px; }
nav a { color: #333; text-decoration: none; }
nav a:hover { color: #0066cc; }
main { max-width: 820px; margin: 0 auto; padding: 40px 24px 80px; background: #fff; }
h1 { font-size: 28px; line-height: 1.4; margin-bottom: 12px; }
h2 { font-size: 21px; margin: 36px 0 12px; padding-top: 8px; border-top: 2px solid #0066cc; }
h3 { font-size: 17px; margin: 22px 0 8px; }
p { margin-bottom: 14px; }
ul, ol { margin: 0 0 16px 22px; }
li { margin-bottom: 6px; }
.meta { color: #888; font-size: 14px; margin-bottom: 24px; }
.lead { font-size: 16px; background: #f0f6ff; border-left: 4px solid #0066cc; padding: 14px 18px; margin-bottom: 24px; }
table { width: 100%; border-collapse: collapse; margin: 16px 0 24px; font-size: 14px; }
th, td { border: 1px solid #ddd; padding: 9px 12px; text-align: left; vertical-align: top; }
th { background: #f2f6fb; font-weight: 600; }
tr:nth-child(even) td { background: #fafafa; }
.faq { background: #f7f7f7; border-radius: 6px; padding: 16px 20px; margin-top: 32px; }
.faq h2 { border-top: none; margin-top: 0; }
.faq dt { font-weight: 600; margin-top: 12px; }
.faq dd { margin: 4px 0 0 0; color: #444; }
footer { max-width: 820px; margin: 0 auto; padding: 24px; color: #999; font-size: 13px; text-align: center; }
@media (max-width: 600px) { h1 { font-size: 22px; } table { font-size: 13px; } th, td { padding: 7px; } }