/* academy.lttcfo.ai/zh/videos — SOP001 Visual Identity v7 (KaiTi retired; Noto Sans SC) */
:root{
  --charcoal:#323232; --graphite:#3D424A; --graphite-deep:#31353B;
  --crimson:#C62F58; --crimson-dark:#A12348; --crimson-tint:#FCE9EF;
  --blue:#5392C5; --blue-tint:#EAF2F9;
  --bg:#FFFFFF; --soft:#7B818A; --line:#E3E5E9;
  --latin:"Poppins",system-ui,-apple-system,"Segoe UI",sans-serif;
  --zh:"Noto Sans SC","Source Han Sans SC","PingFang SC","Microsoft YaHei",sans-serif;
  --wrap:880px;
}
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--charcoal);font-family:var(--zh);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
body:before{content:"";position:fixed;left:0;top:0;bottom:0;width:4px;background:var(--crimson);z-index:60}
.latin{font-family:var(--latin)}
body.latin-page{font-family:var(--latin)}
body.latin-page .zh{font-family:var(--zh)}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--wrap);margin:0 auto;padding:0 28px 0 34px}
@media(max-width:640px){.wrap{padding:0 18px 0 24px}}
header.site{border-bottom:1px solid var(--line);padding:18px 0}
header.site .wrap{display:flex;align-items:center;gap:14px;justify-content:space-between}
header.site .brand{display:flex;align-items:center;gap:12px}
header.site img.logo{height:34px}
header.site .brand span{font-family:var(--latin);font-weight:600;font-size:14px;color:var(--graphite);letter-spacing:.4px}
header.site nav a{margin-left:18px;font-size:14px;color:var(--graphite)}
header.site nav a.active{color:var(--crimson);font-weight:700}
.crumb{font-size:13px;color:var(--soft);margin:26px 0 6px}
.crumb a{color:var(--soft)}
h1{font-size:clamp(24px,4.2vw,34px);line-height:1.3;font-weight:700;margin:.2em 0 .35em}
.dek{color:var(--soft);font-size:16.5px;margin:0 0 22px;max-width:46em}
.meta-row{display:flex;flex-wrap:wrap;gap:14px;font-size:13px;color:var(--soft);margin-bottom:18px;font-family:var(--latin)}
.meta-row .ep{background:var(--crimson-tint);color:var(--crimson);font-weight:600;padding:2px 12px;border-radius:6px}
.player{position:relative;padding-top:56.25%;background:var(--graphite-deep);border-radius:10px;overflow:hidden;margin:6px 0 26px}
.player iframe{position:absolute;inset:0;width:100%;height:100%;border:0}
h2{font-size:20px;font-weight:700;margin:38px 0 12px;padding-top:20px;border-top:1px solid var(--line)}
h2 .no{color:var(--crimson);font-family:var(--latin);font-weight:600;margin-right:10px;font-size:16px}
ul.takeaways{padding-left:1.2em;margin:0}
ul.takeaways li{margin:.45em 0}
ul.takeaways b{color:var(--crimson-dark)}
.transcript p{margin:.9em 0}
.transcript .scene{color:var(--soft);font-size:12.5px;font-family:var(--latin);letter-spacing:1px;text-transform:uppercase;margin-top:1.6em}
details.faq{border:1px solid var(--line);border-radius:8px;margin:10px 0;padding:0 16px}
details.faq summary{cursor:pointer;font-weight:700;padding:12px 0;list-style-position:inside}
details.faq p{margin:0 0 14px;color:var(--graphite)}
.cta{background:var(--crimson-tint);border-radius:10px;padding:22px 24px;margin:40px 0}
.cta b{color:var(--crimson-dark)}
.cta a.mail{font-weight:700;color:var(--crimson)}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:22px;margin:26px 0 40px}
.card{border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:box-shadow .15s}
.card:hover{box-shadow:0 6px 22px rgba(49,53,59,.12);text-decoration:none}
.card img{aspect-ratio:16/9;object-fit:cover;width:100%}
.card .pad{padding:14px 16px 16px}
.card .ep{font-family:var(--latin);font-size:12px;color:var(--crimson);font-weight:600}
.card h3{margin:.25em 0 .3em;font-size:16.5px;line-height:1.45;color:var(--charcoal)}
.card p{margin:0;font-size:13.5px;color:var(--soft)}
footer.site{border-top:1px solid var(--line);margin-top:56px;padding:26px 0 40px;font-size:13.5px;color:var(--soft)}
footer.site .social{margin:8px 0 12px}
footer.site .social a{margin-right:16px;color:var(--graphite)}
footer.site .fine{font-family:var(--latin);font-size:12px}
/* An episode note is a qualification the reader should actually read - the
   sourcing on a compliance episode, or the not-a-licensed-adviser line on the
   stock ones - so it is set larger than the build stamp beneath it. */
.epnote{font-size:13px;line-height:1.75;color:#3D424A;margin-top:30px;padding:14px 18px;border-left:3px solid #C62F58;background:#FAFAFB;border-radius:0 3px 3px 0}
.epnote+.verified{margin-top:12px}
.verified{font-size:12.5px;color:var(--soft);font-family:var(--latin);margin-top:30px}

/* boxed comparison tables (e.g. EP2 各形式对照) */
main table{width:100%;border-collapse:separate;border-spacing:0;font-size:14.5px;
  border:1px solid var(--line);border-radius:10px;overflow:hidden;margin:6px 0 10px;
  font-variant-numeric:tabular-nums}
main table th{background:#FCE9EF;color:var(--crimson);text-align:left;font-size:13px;
  letter-spacing:.5px;padding:10px 14px;border-bottom:1px solid var(--line)}
main table td{padding:10px 14px;border-bottom:1px solid var(--line);vertical-align:top}
main table tr:last-child td{border-bottom:0}
main table tbody tr:nth-child(even) td{background:#FAFAFB}
main table th+th,main table td+td{border-left:1px solid var(--line)}
@media(max-width:640px){
  main .tablewrap{overflow-x:auto}
  main table{min-width:560px}
}

/* ---------- videos index: three-column shell (added 260826) ---------- */
/* Scoped to .hub* / .fab* so the episode pages are unaffected. */
.hubwrap{max-width:1400px;margin:0 auto;padding:0 28px 0 34px}
.hubgrid{display:grid;grid-template-columns:210px minmax(0,1fr) 250px;gap:34px;align-items:start}
.hubrail{position:sticky;top:24px;font-size:13.5px}
.hubrail h4{font-family:var(--latin);font-size:11px;letter-spacing:1.4px;text-transform:uppercase;
  color:var(--soft);margin:0 0 10px;font-weight:600}
.hubrail .grp{margin-bottom:20px}
.hubrail a{display:block;padding:3px 0;color:var(--charcoal);text-decoration:none;line-height:1.5}
.hubrail a:hover{color:var(--crimson)}
.hubrail .cnt{color:var(--soft);font-family:var(--latin);font-size:11.5px}
.hubrail .catlink{display:flex;justify-content:space-between;gap:10px;padding:6px 0;border-bottom:1px solid var(--line)}
.hubrail .catlink b{font-weight:600}
.hubrail .catnote{color:var(--soft);font-size:12px;line-height:1.55;margin:3px 0 0}
.hubsec{scroll-margin-top:20px}
.hubsec>h2{font-size:19px;margin:30px 0 4px;padding-top:6px}
.hubsec>p.secdek{color:var(--soft);font-size:14px;margin:0 0 14px}
.card .when{display:block;margin-top:8px;font-family:var(--latin);font-size:11.5px;color:var(--soft)}
.hubcount{font-family:var(--latin);font-size:13px;color:var(--soft);margin:0 0 18px}
@media(max-width:1180px){
  .hubgrid{grid-template-columns:190px minmax(0,1fr)}
  .hubgrid .hubright{display:none}
}
@media(max-width:820px){
  .hubgrid{grid-template-columns:1fr}
  .hubrail{position:static}
  .hubgrid .hubleft{display:none}
}

/* ---------- floating contact buttons ---------- */
.fab{position:fixed;right:18px;bottom:18px;z-index:80;display:flex;flex-direction:column;gap:10px}
.fab a{width:50px;height:50px;border-radius:50%;display:grid;place-items:center;
  box-shadow:0 4px 14px rgba(49,53,59,.26);transition:transform .14s, box-shadow .14s}
.fab a:hover{transform:translateY(-2px);box-shadow:0 8px 22px rgba(49,53,59,.32)}
.fab svg{width:25px;height:25px;fill:#fff;display:block}
.fab .wa{background:#25D366}
.fab .em{background:var(--crimson)}
@media(max-width:640px){.fab{right:12px;bottom:12px}.fab a{width:46px;height:46px}.fab svg{width:23px;height:23px}}
@media print{.fab{display:none}}

/* Chapter links in the transcript. The heading was already a scene label; now it
   also jumps the player, so it needs to look clickable and carry its timestamp. */
.transcript .scene a{color:var(--soft);text-decoration:none;display:inline-flex;align-items:baseline;gap:.7em}
.transcript .scene a:hover{color:var(--crimson,#C62F58)}
.transcript .scene a:focus-visible{outline:2px solid var(--crimson,#C62F58);outline-offset:3px;border-radius:2px}
.transcript .scene .at{font-variant-numeric:tabular-nums;letter-spacing:0;color:var(--crimson,#C62F58);font-weight:600}

/* Featured lesson on a language hub. Used when a hub carries only a handful of
   episodes and the newest one should carry the page rather than sit in a list. */
.featured{margin:26px 0 34px;padding-top:22px;border-top:2px solid var(--crimson)}
.featured .eyebrow{font-family:var(--latin);font-size:12px;letter-spacing:1.6px;text-transform:uppercase;color:var(--crimson);font-weight:600;margin-bottom:12px}
.featured img{width:100%;height:auto;border-radius:6px;display:block}
.featured h2{margin:16px 0 8px;font-size:22px;line-height:1.4}
.featured h2 .ep{font-family:var(--latin);font-size:13px;color:var(--crimson);font-weight:600;margin-right:8px}
.featured h2 a{color:var(--charcoal);text-decoration:none}
.featured h2 a:hover{text-decoration:underline}
.featured p{color:var(--soft);font-size:15px}
@media(max-width:640px){.featured h2{font-size:19px}}