/* 关于本站（src/html/about.html）：与首页同一底色，左侧小节目录，右侧正文一栏 */
body.about { min-height: 100vh; background: radial-gradient(90% 80% at 72% 30%, #0c1b33 0%, #070f1e 48%, #050b16 100%) fixed; }
.about-wrap { max-width: 1120px; margin: 0 auto; padding: 0 56px; }
.about-top { display: flex; align-items: center; justify-content: space-between; height: 84px; }
.about-top .btn { text-decoration: none; }
.about-body { display: grid; grid-template-columns: 180px minmax(0, 720px); gap: 64px; padding: 24px 0 40px; }

/* 小节目录：随页面滚动停在左侧 */
.about-nav { position: sticky; top: 32px; align-self: start; display: flex; flex-direction: column; gap: 2px; padding-top: 92px; }
.about-nav a { padding: 6px 12px; border-left: 1px solid var(--line); font-size: 14px; color: var(--muted); text-decoration: none; transition: color 0.2s, border-color 0.2s; }
.about-nav a:hover { color: var(--text); }
.about-nav a.on { color: var(--text); border-left-color: var(--sky); }

.about-title { margin: 0 0 8px; font-family: var(--serif); font-weight: 600; font-size: 40px; line-height: 1.2; letter-spacing: 0.06em; }
.about-main section { padding: 36px 0 8px; border-top: 1px solid var(--line); scroll-margin-top: 16px; }
.about-main section:first-of-type { margin-top: 28px; }
.about-main h2 { margin: 0 0 14px; font-family: var(--serif); font-weight: 600; font-size: 22px; letter-spacing: 0.04em; }
.about-main h3 { margin: 22px 0 6px; font-size: 15px; font-weight: 500; color: var(--text); }
.about-main p { margin: 0 0 12px; font-size: 15px; line-height: 1.9; color: var(--text-2); }
.about-main p.note { font-size: 13.5px; color: var(--muted); }
.about-main a:not(.mail) { color: var(--sky); text-decoration: none; }
.about-main a:not(.mail):hover { text-decoration: underline; text-underline-offset: 3px; }

kbd { display: inline-block; min-width: 22px; padding: 0 6px; border-radius: 4px; font: 500 12px/20px var(--num); text-align: center; color: var(--text); background: rgba(255, 255, 255, 0.08); box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.12); }
.keys { display: grid; grid-template-columns: 1fr 1fr; gap: 0 32px; margin: 4px 0 10px; }
.keys > div { display: flex; align-items: center; gap: 12px; padding: 7px 0; border-bottom: 1px solid var(--line); }
.keys dt { flex: none; width: 104px; }
.keys dd { margin: 0; font-size: 14px; color: var(--text-2); }

.credits { width: 100%; margin: 8px 0 16px; border-collapse: collapse; font-size: 14px; }
.credits th { padding: 8px 12px 8px 0; text-align: left; font-weight: 500; font-size: 13px; color: var(--muted); border-bottom: 1px solid var(--line-2); }
.credits td { padding: 10px 12px 10px 0; vertical-align: top; color: var(--text-2); border-bottom: 1px solid var(--line); }
.credits td:first-child { color: var(--text); }

.mail-line { margin-top: 18px !important; }
.mail { display: inline-flex; align-items: center; height: 40px; padding: 0 20px; border-radius: 999px; border: 1px solid var(--line-2); background: rgba(255, 255, 255, 0.04); font-family: var(--num); font-size: 15px; letter-spacing: 0.01em; color: var(--text); text-decoration: none; transition: border-color 0.2s, background 0.2s; }
.mail[href]:hover { border-color: var(--sky); background: var(--sky-soft); }
.sign { margin-top: 28px !important; font-family: var(--num); font-size: 14px !important; color: var(--muted) !important; }

.about-foot { display: flex; justify-content: center; align-items: baseline; flex-wrap: wrap; padding: 20px 0 26px; font-size: 12px; line-height: 1.6; color: var(--faint); border-top: 1px solid var(--line); }
.about-foot > * + *::before { content: '·'; margin: 0 9px; font-family: var(--num); }
.about-foot .beian { display: inline; }
.about-foot .foot-copy, .about-foot .foot-ver { font-family: var(--num); }
.about-foot .foot-ver:empty { display: none; }

@media (max-width: 1280px) {
  .about-wrap { padding: 0 36px; }
  .about-body { grid-template-columns: 150px minmax(0, 1fr); gap: 40px; }
}
@media (max-height: 800px) {
  .about-top { height: 60px; }
  .about-body { padding-top: 12px; }
  .about-nav { padding-top: 76px; }
}