/* AI Coding Field Notes — 站点样式。生成器原样拷贝,改这里即可(lib/ghsite.THEME_DIR)。 */
:root {
  --bg: #ffffff; --bg-soft: #f7f7fb; --card: #ffffff;
  --text: #0f172a; --muted: #5b6475; --line: #e6e8ef;
  --accent: #4f46e5; --accent-2: #7c3aed; --accent-soft: #eef2ff;
  --radius: 14px; --shadow: 0 1px 2px rgba(15,23,42,.04), 0 8px 24px rgba(15,23,42,.06);
  --font: "Inter", ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0d14; --bg-soft: #11141d; --card: #141824;
    --text: #e8eaf2; --muted: #9aa3b5; --line: #232838;
    --accent: #8b8cff; --accent-2: #b48cff; --accent-soft: #1b1f33;
    --shadow: 0 1px 2px rgba(0,0,0,.3), 0 8px 24px rgba(0,0,0,.35);
  }
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body { margin: 0; background: var(--bg); color: var(--text); font: 16px/1.65 var(--font); -webkit-font-smoothing: antialiased; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
img { max-width: 100%; height: auto; }
.wrap { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }

/* ── 顶栏 ── */
.nav { position: sticky; top: 0; z-index: 20; background: color-mix(in srgb, var(--bg) 85%, transparent);
  backdrop-filter: saturate(180%) blur(12px); border-bottom: 1px solid var(--line); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-weight: 700; color: var(--text); letter-spacing: -.01em; white-space: nowrap; }
.brand:hover { text-decoration: none; }
.brand-mark { display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px; font-size: 14px;
  color: #fff; background: linear-gradient(135deg, var(--accent), var(--accent-2)); }
.nav-links { display: flex; align-items: center; gap: 22px; font-size: 15px; }
.nav-links a { color: var(--muted); font-weight: 500; }
.nav-links a:hover { color: var(--text); text-decoration: none; }

/* ── 按钮与表单 ── */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border: 0; cursor: pointer;
  font: 600 15px/1 var(--font); color: #fff !important; padding: 13px 20px; border-radius: 10px;
  background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 6px 18px rgba(79,70,229,.28);
  transition: transform .15s ease, box-shadow .15s ease; }
.btn:hover { transform: translateY(-1px); box-shadow: 0 10px 24px rgba(79,70,229,.34); text-decoration: none; }
.btn-sm { padding: 9px 14px; font-size: 14px; box-shadow: none; }
.field { flex: 1; min-width: 0; font: 15px var(--font); color: var(--text); padding: 13px 14px; border-radius: 10px;
  border: 1px solid var(--line); background: var(--card); outline: none; transition: border-color .15s, box-shadow .15s; }
.field:focus { border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.sub-form { display: flex; gap: 10px; }
.sub-note { margin: 10px 0 0; font-size: 13px; color: var(--muted); }

/* ── 首页 ── */
body.home { background:
  radial-gradient(900px 420px at 50% -120px, color-mix(in srgb, var(--accent) 16%, transparent), transparent 70%),
  var(--bg); }
body.home .main > h1:first-child { max-width: 860px; margin: 80px auto 0; text-align: center; text-wrap: balance;
  font-size: clamp(36px, 6vw, 60px); line-height: 1.05; letter-spacing: -.035em; font-weight: 800; }
.eyebrow { display: block; width: fit-content; margin: 0 auto 0; padding: 6px 12px; border-radius: 999px; font-size: 13px; font-weight: 600;
  color: var(--accent); background: var(--accent-soft); }
.hero { max-width: 680px; margin: 22px auto 0; text-align: center; }
.hero .sub-note { max-width: 520px; margin: 12px auto 0; }
.hero-lede { font-size: 19px; color: var(--muted); margin: 0 0 28px; }
.hero .sub-form { max-width: 480px; margin: 0 auto; }
.trust { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 22px; margin: 26px 0 0; padding: 0; list-style: none;
  font-size: 14px; color: var(--muted); }
.trust b { color: var(--text); font-weight: 700; }
.section { margin: 88px 0 0; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 16px; margin-bottom: 22px; }
.section-head h2 { margin: 0; font-size: 26px; letter-spacing: -.02em; }
.section-head a { font-weight: 600; font-size: 15px; }
.grid { display: grid; gap: 22px; grid-template-columns: repeat(3, 1fr); }
.card { display: flex; flex-direction: column; background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; color: var(--text); box-shadow: var(--shadow); transition: transform .18s ease, border-color .18s ease; }
.card:hover { transform: translateY(-3px); border-color: color-mix(in srgb, var(--accent) 40%, var(--line)); text-decoration: none; }
.card-img { aspect-ratio: 1200 / 630; background: linear-gradient(135deg, var(--accent-soft), var(--bg-soft)); }
.card-img img { width: 100%; height: 100%; object-fit: cover; display: block; }
.card-body { padding: 22px 22px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-tag { align-self: flex-start; font-size: 12px; font-weight: 600; letter-spacing: .02em; text-transform: uppercase;
  color: var(--accent); background: var(--accent-soft); padding: 4px 9px; border-radius: 6px; }
.card-meta { font-size: 13px; color: var(--muted); margin-top: auto; padding-top: 6px; }
.card h3 { margin: 0; font-size: 18px; line-height: 1.35; letter-spacing: -.015em; text-wrap: balance; }
.card p { margin: 0; font-size: 14.5px; color: var(--muted); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.chips { display: flex; flex-wrap: wrap; gap: 10px; }
.chip { padding: 8px 14px; border-radius: 999px; border: 1px solid var(--line); background: var(--card); color: var(--text); font-size: 14px; font-weight: 500; }
.chip span { color: var(--muted); margin-left: 6px; }
.chip:hover { border-color: var(--accent); text-decoration: none; }
.tools { display: grid; gap: 22px; grid-template-columns: repeat(3, 1fr); }
.tool { padding: 24px; border-radius: var(--radius); border: 1px solid var(--line); background: var(--card); color: var(--text); box-shadow: var(--shadow); }
.tool:hover { border-color: var(--accent); text-decoration: none; }
.tool-ico { display: inline-grid; place-items: center; width: 40px; height: 40px; border-radius: 10px; background: var(--accent-soft); font-size: 20px; }
.tool h3 { margin: 14px 0 6px; font-size: 18px; }
.tool p { margin: 0; color: var(--muted); font-size: 14.5px; }
.cta-band { margin: 96px 0 24px; padding: 48px 32px; border-radius: 20px; text-align: center; color: #fff;
  background: linear-gradient(135deg, #312e81, #4f46e5 55%, #7c3aed); }
.cta-band h2 { margin: 0 0 10px; font-size: 30px; letter-spacing: -.02em; }
.cta-band p { margin: 0 auto 24px; max-width: 520px; color: rgba(255,255,255,.82); }
.cta-band .sub-form { max-width: 480px; margin: 0 auto; }
.cta-band .field { background: rgba(255,255,255,.12); border-color: rgba(255,255,255,.28); color: #fff; }
.cta-band .field::placeholder { color: rgba(255,255,255,.65); }
.cta-band .btn { background: #fff; color: #312e81 !important; box-shadow: none; }
.cta-band .sub-note { color: rgba(255,255,255,.7); }

/* ── 文章与普通页 ── */
.main { padding-bottom: 40px; }
.prose { max-width: 720px; margin: 48px auto 0; font-size: 17.5px; line-height: 1.75; }
.prose-wide { max-width: 980px; }
.prose .meta { display: flex; gap: 14px; margin: 0 0 14px; font-size: 14px; color: var(--muted); }
.prose h1 { font-size: clamp(30px, 4.6vw, 44px); line-height: 1.12; letter-spacing: -.03em; margin: 0 0 24px; font-weight: 800; }
.prose h2 { font-size: 26px; letter-spacing: -.02em; margin: 48px 0 12px; line-height: 1.25; }
.prose h3 { font-size: 20px; margin: 32px 0 8px; }
.prose p, .prose ul, .prose ol { margin: 0 0 20px; }
.prose li { margin: 6px 0; }
.prose blockquote { margin: 24px 0; padding: 4px 20px; border-left: 3px solid var(--accent); color: var(--muted); background: var(--bg-soft); border-radius: 0 10px 10px 0; }
.prose code { font: .88em var(--mono); background: var(--bg-soft); border: 1px solid var(--line); padding: .1em .35em; border-radius: 6px; }
.prose pre { overflow-x: auto; padding: 16px; border-radius: 12px; background: #0f172a; color: #e2e8f0; font-size: 14px; }
.prose pre code { background: none; border: 0; padding: 0; color: inherit; }
.prose table { display: block; overflow-x: auto; width: 100%; border-collapse: collapse; font-size: 14.5px; margin: 24px 0; }
.prose th, .prose td { padding: 10px 12px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
.prose th { font-weight: 600; background: var(--bg-soft); position: sticky; top: 0; }
.prose tr:hover td { background: var(--bg-soft); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 40px 0; }
.prose img { border-radius: 12px; }
/* 正文开头那张分享卡片:它是给社交平台预览用的(og:image),印的就是标题,
   在页面里和 h1 重复;长标题时卡片上的字还会压线。页面里藏掉,meta 里照旧。 */
article.prose p:has(> img[src*="/assets/cards/a/"]), article.prose img[src*="/assets/cards/a/"] { display: none; }
.prose h1 { text-wrap: balance; }

/* 文章页底部订阅框(由 head-custom 里的脚本补进来) */
.subscribe { margin: 48px 0 8px; padding: 28px; border-radius: 18px; border: 1px solid var(--line);
  background: linear-gradient(180deg, var(--accent-soft), var(--card)); }
.subscribe h3 { margin: 0 0 6px; font-size: 21px; letter-spacing: -.01em; }
.subscribe p { margin: 0 0 16px; color: var(--muted); font-size: 15.5px; }
.home .subscribe { display: none; }

/* 首页三个单元 */
.tracks { display: grid; gap: 22px; grid-template-columns: repeat(3, 1fr); }
.track { display: flex; flex-direction: column; padding: 24px; border-radius: var(--radius); border: 1px solid var(--line);
  background: var(--card); box-shadow: var(--shadow); }
.track-head { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.track h3 { margin: 0; font-size: 20px; letter-spacing: -.01em; }
.track > p { margin: 0 0 14px; color: var(--muted); font-size: 14.5px; }
.track-list { list-style: none; padding: 0; margin: 0 0 14px; display: grid; gap: 8px; font-size: 14.5px; line-height: 1.4; }
.track-list a { color: var(--text); font-weight: 500; }
.track-more { margin-top: auto; font-weight: 600; font-size: 14px; }
@media (max-width: 900px) { .tracks { grid-template-columns: 1fr; } }

/* 全部文章页 */
.list { list-style: none; padding: 0; margin: 0; }
.list li { padding: 18px 0; border-bottom: 1px solid var(--line); }
.list a { font-weight: 600; font-size: 18px; color: var(--text); }
.list .card-meta { margin-top: 4px; }

/* ── 页脚 ── */
.footer { margin-top: 64px; border-top: 1px solid var(--line); background: var(--bg-soft); }
.footer-inner { display: flex; justify-content: space-between; gap: 32px; padding-top: 40px; padding-bottom: 20px; flex-wrap: wrap; }
.footer-inner p { max-width: 360px; font-size: 14px; }
.footer-links { display: grid; grid-template-columns: repeat(2, auto); gap: 8px 32px; font-size: 14.5px; }
.footer-links a { color: var(--muted); }
.fine { padding-bottom: 32px; font-size: 12.5px; color: var(--muted); }

/* ── 响应式 ── */
@media (max-width: 900px) { .grid, .tools { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) {
  .wrap { padding: 0 18px; }
  .grid, .tools { grid-template-columns: 1fr; }
  .hide-sm, .nav-links a:not(.btn) { display: none; }
  .nav-links { gap: 10px; }
  .sub-form { flex-direction: column; }
  body.home .main > h1:first-child { margin-top: 48px; }
  .section { margin-top: 64px; }
  .prose { font-size: 17px; margin-top: 32px; }
  .cta-band { padding: 36px 20px; }
}