/* 太空补给站 样式：无依赖、无脚本。浅色为默认，跟随系统切换深色。 */
:root {
  --bg: #f5f6fb; --surface: #ffffff; --text: #1a1f36; --muted: #4f5873; --border: #dde1ee;
  --accent: #4f35e0; --accent-ink: #ffffff; --accent-soft: #ecebff; --link: #4a2fd6;
  --hero1: #0b1026; --hero2: #2a1d7a; --focus: #ffb703; --code-bg: #eef0f8;
  --radius: 14px; --shadow: 0 1px 2px rgba(20, 24, 60, .06), 0 8px 24px rgba(20, 24, 60, .06);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0a0d1c; --surface: #131833; --text: #e8ebf8; --muted: #a9b1cd; --border: #262c54;
    --accent: #a99bff; --accent-ink: #0a0d1c; --accent-soft: #1d2050; --link: #b9aeff; --code-bg: #0f1329; --shadow: none;
  }
}
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body { margin: 0; font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.75; font-size: 17px; }
img, picture { max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
:focus-visible { outline: 3px solid var(--focus); outline-offset: 2px; border-radius: 4px; }
.skip { position: absolute; left: -9999px; top: 8px; background: var(--surface); color: var(--text); padding: 10px 14px; border-radius: 8px; z-index: 10; }
.skip:focus { left: 8px; }
.sr { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.wrap { max-width: 1080px; margin: 0 auto; padding: 0 20px; }

/* 头部 */
.site-header { background: var(--hero1); color: #fff; }
.site-header .bar { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding-top: 10px; padding-bottom: 10px; flex-wrap: wrap; }
.brand { display: flex; align-items: center; gap: 10px; color: #fff; text-decoration: none; font-weight: 700; font-size: 19px; letter-spacing: .5px; }
.brand img { border-radius: 9px; }
.site-header nav ul { list-style: none; margin: 0; padding: 0; display: flex; gap: 4px; flex-wrap: wrap; }
.site-header nav a { display: block; padding: 8px 12px; border-radius: 8px; color: #d9defa; text-decoration: none; font-size: 15px; }
.site-header nav a:hover { background: rgba(255, 255, 255, .1); color: #fff; }
.site-header nav a[aria-current="page"] { background: rgba(255, 255, 255, .16); color: #fff; font-weight: 600; }

/* 首屏 */
.hero { background: radial-gradient(1200px 400px at 85% 20%, rgba(124, 92, 255, .35), transparent 60%), linear-gradient(160deg, var(--hero1), var(--hero2)); color: #fff; }
.hero .wrap { display: grid; grid-template-columns: 1.15fr .85fr; gap: 28px; align-items: center; padding-top: 44px; padding-bottom: 44px; }
.hero h1 { font-size: clamp(34px, 6vw, 52px); line-height: 1.15; margin: 4px 0 14px; letter-spacing: 1px; }
.hero .eyebrow { margin: 0; color: #b9c2ff; font-size: 14px; letter-spacing: 2px; }
.hero .lead { color: #dfe3ff; font-size: 18px; max-width: 34em; margin: 0 0 22px; }
.hero-art img { display: block; width: 100%; max-width: 440px; margin-left: auto; border-radius: 22px; box-shadow: 0 18px 50px rgba(0, 0, 0, .45); }
.btn { display: inline-block; padding: 11px 20px; border-radius: 10px; background: var(--accent); color: var(--accent-ink); text-decoration: none; font-weight: 600; margin: 0 10px 10px 0; border: 2px solid var(--accent); }
.btn:hover { filter: brightness(1.08); }
.hero .btn { background: #fff; color: #1a1f36; border-color: #fff; }
.btn-ghost, .hero .btn-ghost { background: transparent; color: inherit; border-color: currentColor; }
.hero .btn-ghost { color: #fff; }

/* 内容区 */
main { display: block; }
.section { padding: 34px 0 6px; }
.section > .wrap > h2, .page-title h1 { margin: 0 0 6px; }
h1 { font-size: clamp(28px, 4.5vw, 38px); line-height: 1.25; }
h2 { font-size: 24px; line-height: 1.35; margin: 2em 0 .5em; }
h3 { font-size: 19px; margin: 1.4em 0 .4em; }
.section-sub { color: var(--muted); margin: 0 0 18px; }
.grid { display: grid; gap: 16px; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); list-style: none; padding: 0; margin: 18px 0; }
.card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px 18px 16px; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.card h3 { margin: 0 0 6px; font-size: 18px; }
.card h3 a { color: var(--text); text-decoration: none; }
.card h3 a:hover { color: var(--link); text-decoration: underline; }
.card p { margin: 0 0 8px; color: var(--muted); font-size: 15.5px; line-height: 1.65; }
.card .host { margin-top: auto; font-size: 13px; font-family: var(--mono); color: var(--muted); word-break: break-all; }
.card.big { padding: 22px; }
.card.big h3 { font-size: 20px; }
.tag { display: inline-block; font-size: 13px; background: var(--accent-soft); color: var(--link); padding: 1px 10px; border-radius: 99px; margin-bottom: 8px; }

/* 文章 */
.page-title { padding: 30px 0 0; }
.crumbs { font-size: 14px; color: var(--muted); margin: 0 0 10px; }
.crumbs a { color: var(--muted); }
.meta { color: var(--muted); font-size: 14px; margin: 6px 0 0; }
.prose { max-width: 740px; padding-bottom: 36px; }
.prose p, .prose ul, .prose ol { margin: 0 0 1em; }
.prose li { margin: .3em 0; }
.prose .lead { font-size: 19px; color: var(--muted); }
.prose blockquote { margin: 1em 0; padding: .6em 1em; border-left: 4px solid var(--accent); background: var(--accent-soft); border-radius: 0 10px 10px 0; }
.prose blockquote p:last-child { margin-bottom: 0; }
pre, code { font-family: var(--mono); font-size: .92em; }
code { background: var(--code-bg); padding: 1px 6px; border-radius: 6px; }
pre { background: var(--code-bg); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px; overflow-x: auto; line-height: 1.55; white-space: pre-wrap; word-break: break-word; }
pre code { background: none; padding: 0; }
.toc { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 18px; margin: 22px 0 6px; max-width: 740px; }
.toc strong { font-size: 15px; }
.toc ol { margin: 6px 0 4px; padding-left: 1.3em; font-size: 15.5px; }
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; margin: 1em 0; }
.compare > div { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 4px 14px 10px; }
.compare h3 { font-size: 16px; margin: 10px 0 6px; }
.compare pre { margin: 0; }
.note { background: var(--accent-soft); border-radius: var(--radius); padding: 14px 18px; margin: 1.2em 0; }
.note p:last-child { margin-bottom: 0; }
.warn { border-left: 4px solid #d97706; background: rgba(217, 119, 6, .1); padding: 12px 16px; border-radius: 0 10px 10px 0; margin: 1.2em 0; }
.warn p:last-child { margin-bottom: 0; }
.guide-list { list-style: none; padding: 0; margin: 14px 0; display: grid; gap: 14px; }
.guide-list li { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; box-shadow: var(--shadow); }
.guide-list a { font-weight: 700; font-size: 18px; color: var(--text); text-decoration: none; }
.guide-list a:hover { color: var(--link); text-decoration: underline; }
.guide-list p { margin: 4px 0 4px; color: var(--muted); font-size: 15.5px; }
.guide-list .meta { margin: 0; }
.status { display: inline-block; font-size: 14px; padding: 2px 12px; border-radius: 99px; background: rgba(217, 119, 6, .14); color: #8a4b05; font-weight: 600; }
@media (prefers-color-scheme: dark) { .status { color: #f3b765; } }
.banner { display: block; margin: 18px 0; }
.banner img { display: block; width: 100%; max-width: 760px; border-radius: 16px; box-shadow: 0 10px 30px rgba(0, 0, 0, .25); }
table.simple { border-collapse: collapse; width: 100%; font-size: 15.5px; margin: 1em 0; }
table.simple th, table.simple td { border: 1px solid var(--border); padding: 8px 12px; text-align: left; vertical-align: top; }
table.simple th { background: var(--accent-soft); }

/* 页脚 */
.site-footer { background: var(--hero1); color: #c6cdf0; margin-top: 40px; font-size: 15px; }
.site-footer .wrap { display: grid; grid-template-columns: 1.4fr 1fr 1fr; gap: 24px; padding-top: 32px; padding-bottom: 26px; }
.site-footer h2 { font-size: 15px; color: #fff; margin: 0 0 8px; }
.site-footer ul { list-style: none; margin: 0; padding: 0; }
.site-footer li { margin: 4px 0; }
.site-footer a { color: #d9defa; }
.site-footer p { margin: 0 0 8px; }
.site-footer .legal { border-top: 1px solid rgba(255, 255, 255, .12); font-size: 13.5px; color: #9aa4d6; padding: 14px 20px 22px; max-width: 1080px; margin: 0 auto; }

@media (max-width: 760px) {
  body { font-size: 16.5px; }
  .hero .wrap { grid-template-columns: 1fr; padding-top: 26px; padding-bottom: 30px; }
  .hero-art { order: -1; }
  .hero-art img { max-width: 300px; margin: 0 auto; }
  .compare { grid-template-columns: 1fr; }
  .site-footer .wrap { grid-template-columns: 1fr; }
  .site-header nav ul { gap: 0; }
}
@media (prefers-reduced-motion: reduce) { * { animation: none !important; transition: none !important; scroll-behavior: auto !important; } }