:root { color-scheme: light; color: #20262f; background: #fff; font-family: system-ui, -apple-system, BlinkMacSystemFont, "Hiragino Sans", "Yu Gothic", sans-serif; line-height: 1.85; }
* { box-sizing: border-box; }
body { margin: 0; letter-spacing: 0; }
a { color: #176b9c; text-underline-offset: 3px; overflow-wrap: anywhere; }
a:hover { color: #a54834; }
a:focus-visible { outline: 2px solid #2878b8; outline-offset: 4px; }
.site-header { padding: 18px 26px; display: flex; gap: 18px; flex-wrap: wrap; align-items: center; justify-content: space-between; border-bottom: 1px solid #dfe4ea; }
.site-name { font-size: 20px; font-weight: 750; color: #20262f; text-decoration: none; }
.site-header nav, .site-footer nav { display: flex; flex-wrap: wrap; gap: 12px 22px; font-size: 14px; }
.reading-main { width: min(100%, 824px); margin: 0 auto; padding: 38px 24px 64px; }
h1 { margin: 8px 0 14px; font-size: 30px; line-height: 1.4; overflow-wrap: anywhere; }
h2 { margin: 0 0 12px; font-size: 21px; line-height: 1.5; }
p { margin: 12px 0; }
.lead { font-size: 17px; color: #4b5663; }
.section-label, .article-date, .breadcrumb { color: #657080; font-size: 13px; }
.section-label { margin: 0; color: #a54834; font-weight: 700; }
section { margin-top: 36px; scroll-margin-top: 20px; }
.article-toc { display: flex; flex-wrap: wrap; gap: 12px 24px; margin-top: 26px; padding: 18px 0; border-block: 1px solid #dfe4ea; font-size: 14px; }
li + li { margin-top: 8px; }
ol, ul { padding-left: 1.5em; }
.table-wrap { overflow-x: auto; margin: 20px 0; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
caption { text-align: left; font-weight: 700; margin-bottom: 10px; }
th, td { padding: 12px; text-align: left; vertical-align: top; border: 1px solid #dfe4ea; min-width: 105px; }
thead th { background: #f4f7f9; }
tbody th { font-weight: 600; }
figure { margin: 22px 0; }
pre { margin: 0; padding: 18px; border-left: 3px solid #7cc7e8; background: #f4f7f9; font-size: 14px; white-space: pre-wrap; overflow-wrap: anywhere; }
figcaption { color: #657080; font-size: 13px; margin-top: 9px; }
.guide-index { margin: 32px 0; }
.guide-index article { padding: 24px 0; border-top: 1px solid #dfe4ea; }
.guide-index h2 { margin-top: 6px; }
.guide-index p { color: #4b5663; }
.related-links { display: grid; gap: 12px; border-top: 1px solid #dfe4ea; margin-top: 40px; padding-top: 24px; }
.related-links h2 { font-size: 18px; margin: 0; }
.guide-ad { margin-top: 48px; padding-top: 12px; border-top: 1px solid #dfe4ea; }
.ad-label { display: block; color: #657080; font-size: 12px; margin-bottom: 10px; }
.guide-ad:has(.adsbygoogle[data-ad-status="unfilled"]) { display: none; }
.site-footer { padding: 28px 24px; background: #f4f7f9; border-top: 1px solid #dfe4ea; font-size: 13px; color: #657080; }
.site-footer p, .site-footer nav { max-width: 776px; margin: 12px auto; }
@media (max-width: 600px) { .site-header { padding: 16px; } .reading-main { padding: 28px 18px 48px; } h1 { font-size: 25px; } h2 { font-size: 19px; } .lead { font-size: 16px; } th, td { padding: 10px; } }