/* AI 工具图鉴 — static site styles */
:root {
  --bg: #faf8f5;
  --bg-soft: #f2eee8;
  --card: #ffffff;
  --ink: #1b1714;
  --ink-2: #4a423b;
  --ink-3: #837a71;
  --line: #e6dfd6;
  --accent: #d33a2c;
  --accent-soft: #fbe9e6;
  --shadow: 0 1px 2px rgba(27, 23, 20, .04), 0 8px 24px -12px rgba(27, 23, 20, .18);
  --radius: 16px;
  --maxw: 1180px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0; background: var(--bg); color: var(--ink);
  font-family: var(--font); font-size: 16px; line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; }
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 24px; }

/* header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 245, .82);
  backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--line);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 62px; }
.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; letter-spacing: .02em; }
.brand-mark {
  display: inline-grid; place-items: center; width: 28px; height: 28px; border-radius: 8px;
  background: var(--ink); color: #fff; font-size: 11px; font-weight: 800; letter-spacing: .04em;
}
.brand-text { font-size: 16px; }
.nav { display: flex; gap: 22px; font-size: 14px; color: var(--ink-3); }
.nav a:hover { color: var(--accent); }

/* hero */
.hero { padding: 72px 0 40px; border-bottom: 1px solid var(--line); background:
  radial-gradient(1100px 380px at 15% -10%, #fff 0%, rgba(255,255,255,0) 60%),
  radial-gradient(700px 300px at 95% 0%, var(--accent-soft) 0%, rgba(251,233,230,0) 70%); }
.eyebrow { margin: 0 0 14px; font-size: 12px; letter-spacing: .22em; color: var(--accent); font-weight: 700; }
.hero h1 { margin: 0; font-size: clamp(34px, 5vw, 56px); line-height: 1.12; letter-spacing: -.02em; font-weight: 800; }
.lede { margin: 18px 0 0; max-width: 640px; color: var(--ink-2); font-size: 17px; }
.hero-stats { display: flex; gap: 44px; margin-top: 34px; }
.hero-stats div { display: flex; flex-direction: column; }
.hero-stats strong { font-size: 28px; line-height: 1; font-weight: 800; letter-spacing: -.02em; }
.hero-stats span { margin-top: 6px; font-size: 13px; color: var(--ink-3); }

/* toolbar */
.toolbar { display: flex; gap: 14px; align-items: center; margin: 34px 0 18px; flex-wrap: wrap; }
.search {
  flex: 1 1 380px; display: flex; align-items: center; gap: 10px;
  background: var(--card); border: 1px solid var(--line); border-radius: 12px;
  padding: 0 14px; height: 46px; color: var(--ink-3); transition: border-color .15s, box-shadow .15s;
}
.search:focus-within { border-color: var(--ink-3); box-shadow: 0 0 0 4px rgba(27,23,20,.05); }
.search input { flex: 1; border: 0; outline: 0; background: transparent; font: inherit; font-size: 15px; color: var(--ink); height: 100%; }
.search input::placeholder { color: #a89e94; }
#sort {
  height: 46px; padding: 0 14px; border-radius: 12px; border: 1px solid var(--line);
  background: var(--card); font: inherit; font-size: 14px; color: var(--ink-2); cursor: pointer;
}

/* chips */
.chips { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 8px; }
.chip {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 13px; border-radius: 999px;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2);
  font: inherit; font-size: 13px; cursor: pointer; transition: all .15s; white-space: nowrap;
}
.chip em { font-style: normal; font-size: 11px; color: var(--ink-3); }
.chip:hover { border-color: #cfc5b9; color: var(--ink); }
.chip-active { background: var(--ink); border-color: var(--ink); color: #fff; }
.chip-active em { color: rgba(255,255,255,.65); }
.chip-sm { padding: 3px 9px; font-size: 11.5px; border-radius: 6px; background: var(--bg-soft); border-color: transparent; color: var(--ink-3); cursor: default; }
.result-count { margin: 14px 0 22px; font-size: 13px; color: var(--ink-3); }

/* grid */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 26px; padding-bottom: 72px; }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow); transition: transform .22s cubic-bezier(.2,.7,.3,1), box-shadow .22s, border-color .22s;
}
.card:hover { transform: translateY(-4px); box-shadow: 0 18px 40px -18px rgba(27,23,20,.32); border-color: #d8cec2; }
.card-link { display: flex; flex-direction: column; height: 100%; }
.card-cover { position: relative; aspect-ratio: 16 / 10; background: var(--bg-soft); overflow: hidden; }
.card-cover img { width: 100%; height: 100%; object-fit: cover; display: block; transition: transform .5s cubic-bezier(.2,.7,.3,1); }
.card:hover .card-cover img { transform: scale(1.035); }
.card-cover-empty { display: grid; place-items: center; background: linear-gradient(135deg, #f4efe8, #eae3da); }
.card-cover-empty span { font-size: 34px; font-weight: 800; color: #c3b7a8; letter-spacing: .06em; }
.card-body { padding: 18px 20px 20px; display: flex; flex-direction: column; gap: 10px; flex: 1; }
.card-meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--ink-3); }
.card-meta time { letter-spacing: .02em; }
.dot { color: #c9bfb4; }
.badge {
  display: inline-block; padding: 1px 7px; border-radius: 5px; font-size: 10.5px; font-weight: 700;
  letter-spacing: .06em; background: var(--accent-soft); color: var(--accent);
}
.card-title { margin: 0; font-size: 17.5px; line-height: 1.45; font-weight: 700; letter-spacing: -.01em; }
.card-summary { margin: 0; font-size: 13.5px; line-height: 1.65; color: var(--ink-3); display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.card-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: auto; padding-top: 4px; }
.empty { padding: 60px 0 100px; text-align: center; color: var(--ink-3); }

/* about */
.about { padding: 64px 24px 80px; border-top: 1px solid var(--line); max-width: 780px; }
.about h2 { margin: 0 0 14px; font-size: 22px; letter-spacing: -.01em; }
.about p { color: var(--ink-2); }
.muted { color: var(--ink-3); font-size: 13.5px; }
code { background: var(--bg-soft); padding: 2px 6px; border-radius: 5px; font-size: .88em; }

/* article */
.article-wrap { max-width: 820px; margin: 0 auto; padding: 40px 24px 90px; }
.back { display: inline-block; font-size: 14px; color: var(--ink-3); margin-bottom: 26px; }
.back:hover { color: var(--accent); }
.article-head { padding-bottom: 26px; border-bottom: 1px solid var(--line); margin-bottom: 30px; }
.article-head h1 { margin: 14px 0 16px; font-size: clamp(27px, 4vw, 40px); line-height: 1.25; letter-spacing: -.02em; font-weight: 800; }
.article-head .card-meta { font-size: 13px; }
.actions { display: flex; gap: 10px; margin-top: 20px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px; padding: 10px 18px; border-radius: 10px;
  background: var(--ink); color: #fff; font-size: 14px; font-weight: 600; transition: opacity .15s;
}
.btn:hover { opacity: .85; }
.btn-ghost { background: var(--card); color: var(--ink); border: 1px solid var(--line); }

/* toc */
.toc { background: var(--card); border: 1px solid var(--line); border-radius: 12px; padding: 14px 20px; margin-bottom: 34px; font-size: 14px; }
.toc summary { cursor: pointer; font-weight: 600; color: var(--ink-2); }
.toc ol { margin: 12px 0 4px; padding-left: 20px; color: var(--ink-3); }
.toc li { margin: 5px 0; }
.toc a:hover { color: var(--accent); }
.toc-l3 { margin-left: 16px !important; font-size: 13px; }

/* prose */
.prose { font-size: 16.5px; line-height: 1.85; color: #2a2521; }
.prose > *:first-child { margin-top: 0; }
.prose h2 {
  margin: 56px 0 18px; font-size: 25px; line-height: 1.35; letter-spacing: -.01em; font-weight: 800;
  padding-top: 8px;
}
.prose h2::before { content: ""; display: block; width: 34px; height: 3px; background: var(--accent); border-radius: 2px; margin-bottom: 14px; }
.prose h3 { margin: 38px 0 14px; font-size: 20px; font-weight: 700; letter-spacing: -.01em; }
.prose h4 { margin: 28px 0 10px; font-size: 17px; font-weight: 700; }
.prose p { margin: 18px 0; }
.prose a { color: var(--accent); border-bottom: 1px solid rgba(211,58,44,.3); }
.prose a:hover { border-bottom-color: var(--accent); }
.prose img { display: block; margin: 26px auto; border-radius: 12px; border: 1px solid var(--line); }
.prose blockquote {
  margin: 26px 0; padding: 18px 22px; border-left: 4px solid var(--accent);
  background: var(--accent-soft); border-radius: 0 12px 12px 0; color: #4a2a26;
}
.prose blockquote p { margin: 8px 0; }
.prose blockquote p:first-child { margin-top: 0; }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose ul, .prose ol { margin: 18px 0; padding-left: 26px; }
.prose li { margin: 8px 0; }
.prose li::marker { color: var(--accent); }
.prose hr { border: 0; border-top: 1px solid var(--line); margin: 44px 0; }
.prose table { width: 100%; border-collapse: collapse; margin: 24px 0; font-size: 14.5px; display: block; overflow-x: auto; }
.prose th, .prose td { border: 1px solid var(--line); padding: 10px 12px; text-align: left; vertical-align: top; }
.prose th { background: var(--bg-soft); font-weight: 700; }
.prose code { background: #f3efe9; border: 1px solid #eae2d8; padding: 2px 6px; border-radius: 5px; font-size: .86em; font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace; }
.prose pre { margin: 22px 0; padding: 18px 20px; background: #1e1b18; color: #eae4dc; border-radius: 12px; overflow-x: auto; line-height: 1.6; }
.prose pre code { background: none; border: 0; padding: 0; color: inherit; font-size: 13.5px; }
.prose font[color="red"] { color: var(--accent) !important; }
.prose strong { font-weight: 700; }

/* pager */
.pager-wrap { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 60px; }
.pager { display: flex; flex-direction: column; gap: 6px; padding: 18px 20px; background: var(--card); border: 1px solid var(--line); border-radius: 12px; transition: border-color .15s, transform .15s; }
.pager:hover { border-color: #d3c8bb; transform: translateY(-2px); }
.pager span { font-size: 12px; color: var(--ink-3); }
.pager strong { font-size: 14.5px; font-weight: 600; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.pager.next { text-align: right; align-items: flex-end; }

/* footer */
.site-footer { border-top: 1px solid var(--line); padding: 34px 0 46px; margin-top: 20px; }
.site-footer p { margin: 4px 0; font-size: 13px; color: var(--ink-3); }

@media (max-width: 640px) {
  .wrap { padding: 0 18px; }
  .hero { padding: 46px 0 30px; }
  .hero-stats { gap: 28px; }
  .grid { grid-template-columns: 1fr; gap: 20px; }
  .article-wrap { padding: 26px 18px 70px; }
  .pager-wrap { grid-template-columns: 1fr; }
  .nav { gap: 14px; }
  .brand-text { display: none; }
  .prose { font-size: 16px; }
}
/* ads */
.ad-slot {
  margin: 28px 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.ad-slot > ins, .ad-slot > script, .ad-slot > iframe { max-width: 100%; }
.ad-empty {
  flex-direction: column;
  gap: 4px;
  min-height: 100px;
  border: 1px dashed #d8cec2;
  border-radius: 12px;
  background: repeating-linear-gradient(135deg, #fbf8f4, #fbf8f4 10px, #f6f1ea 10px, #f6f1ea 20px);
  color: #a89e94;
  font-size: 13px;
  letter-spacing: .04em;
}
.ad-empty span { font-weight: 600; color: #8d8378; }
.ad-empty em { font-style: normal; font-size: 12px; }
.ad-feed { grid-column: 1 / -1; margin: 6px 0; }
.ad-slot-articleTop { margin: 30px 0 34px; }
.ad-slot-articleBottom { margin: 44px 0 10px; }
.ad-slot-homeTop { margin: 34px 0 0; }
/* media: video + ppt */
.media {
  margin: 34px 0 8px;
  padding: 22px 22px 20px;
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 14px;
}
.media-head { display: flex; align-items: baseline; gap: 10px; flex-wrap: wrap; margin-bottom: 16px; }
.media-head h2 { margin: 0; font-size: 17px; font-weight: 700; letter-spacing: -.01em; }
.media-head p { margin: 0; font-size: 12.5px; color: var(--ink-3); }
.video-block { margin: 0 0 16px; }
.video-block video {
  display: block; width: 100%; max-height: 520px; background: #000;
  border-radius: 10px; border: 1px solid var(--line);
}
.video-block figcaption { margin-top: 8px; font-size: 12px; color: var(--ink-3); font-family: ui-monospace, Menlo, Consolas, monospace; }
.media-file { display: flex; gap: 12px; align-items: flex-start; padding: 12px 14px; background: var(--bg-soft); border-radius: 10px; }
.media-kind {
  flex: none; padding: 2px 8px; border-radius: 5px; font-size: 11px; font-weight: 700;
  letter-spacing: .06em; background: var(--accent-soft); color: var(--accent);
}
.media-file strong { display: block; font-size: 13.5px; font-family: ui-monospace, Menlo, Consolas, monospace; font-weight: 600; }
.media-file em { display: block; margin-top: 3px; font-style: normal; font-size: 12px; color: var(--ink-3); }
@media (max-width: 640px) {
  .media { padding: 16px; }
  .video-block video { max-height: 320px; }
}
/* download fallback */
.dl-fallback { margin-top: 14px; border-top: 1px dashed var(--line); padding-top: 12px; }
.dl-fallback summary { cursor: pointer; font-size: 13px; color: var(--ink-3); }
.dl-fallback summary:hover { color: var(--accent); }
.dl-fallback p { margin: 10px 0 12px; font-size: 12.5px; color: var(--ink-3); line-height: 1.6; }
.dl-row { display: flex; align-items: center; gap: 10px; margin: 8px 0; }
.dl-kind { flex: none; width: 34px; font-size: 11.5px; color: var(--ink-3); }
.dl-row code {
  flex: 1; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap;
  font-size: 12px; padding: 7px 10px; background: var(--bg-soft); border-radius: 7px;
  user-select: all;
}
.copy-btn {
  flex: none; padding: 7px 14px; border-radius: 8px; border: 1px solid var(--line);
  background: var(--card); color: var(--ink); font: inherit; font-size: 12.5px; cursor: pointer;
}
.copy-btn:hover { border-color: #cfc5b9; }