/* Mục Hướng dẫn (/huong-dan). Bố cục 2 cột dùng lại .tp-layout của tools.css. */
.gd-hero{padding:40px 0 8px}
.gd-hero h1{font-size:clamp(28px,4vw,40px);line-height:1.2;margin:0 0 12px;max-width:860px}
.gd-hero .lead{max-width:760px;margin:0 0 14px}
.gd-meta{display:flex;flex-wrap:wrap;gap:6px;align-items:center;font-size:14px;color:var(--faint);margin:0}
.gd-meta svg{width:16px;height:16px}
.gd-meta a{color:inherit}
.gd-toc{border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin:16px 0 8px;background:var(--bg-2)}
.gd-toc b{display:block;margin-bottom:6px}
.gd-toc ol{margin:0;padding-left:20px}
.gd-toc li{margin:4px 0}
.gd-body{margin-top:16px}
.gd-body h2{scroll-margin-top:90px}
.gd-body table{width:100%;border-collapse:collapse;font-size:15px;margin:12px 0 20px;display:block;overflow-x:auto}
.gd-body th,.gd-body td{border:1px solid var(--line);padding:8px 10px;text-align:left;vertical-align:top}
.gd-body th{background:var(--bg-2)}
.gd-note{border-left:4px solid #f6b73c;background:#fff8e8;padding:12px 16px;border-radius:8px;margin:16px 0}
.gd-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.gd-card{display:flex;flex-direction:column;gap:8px;padding:22px;border:1px solid var(--line);border-radius:18px;text-decoration:none;color:var(--ink);background:var(--surface);transition:box-shadow .2s}
.gd-card:hover{box-shadow:0 8px 28px rgba(15,23,42,.08)}
.gd-card b{font-size:18px;line-height:1.35}
.gd-card span:not(.tl-cta-ico){color:var(--muted);font-size:15px}
.gd-card small{color:var(--faint);margin-top:auto}
@media (max-width:900px){.gd-grid{grid-template-columns:minmax(0,1fr)}}
.gd-chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 8px}
.gd-chips a{display:inline-flex;align-items:center;gap:6px;padding:7px 12px;border:1px solid var(--line);border-radius:999px;font-size:14px;color:var(--ink);text-decoration:none;background:var(--surface)}
.gd-chips a:hover{border-color:var(--ink)}
.gd-chips svg{width:15px;height:15px}
.gd-chips small{color:var(--faint)}
.gd-group{display:flex;align-items:center;gap:10px;font-size:22px;margin:40px 0 16px;scroll-margin-top:90px}
.gd-group svg{width:22px;height:22px}
.gd-body .shot{margin:18px 0 24px}
.gd-body .shot img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:12px;background:#fff;box-shadow:0 8px 24px -16px rgba(10,15,28,.35)}
.gd-body .shot figcaption{font-size:14px;color:var(--muted);margin-top:8px;line-height:1.5}
.gd-body pre{overflow-x:auto;background:var(--bg-2);border:1px solid var(--line);border-radius:10px;padding:12px 14px;font-size:14px}
.gd-body .shot picture{display:block}

/* ---- Trang /huong-dan và trang chủ đề (bố cục 2026-10-15) ---- */
.hg-hero{padding:36px 0 40px;border-bottom:1px solid var(--line);background:radial-gradient(700px 360px at 0% 0%,#fff4e0,transparent 70%),radial-gradient(600px 380px at 100% 100%,#fff7ec,transparent 70%),var(--bg)}
.hg-hero-sm{padding-bottom:32px}
.hg-hero h1{font-size:clamp(32px,5vw,52px);line-height:1.08;margin:14px 0 14px;max-width:820px}
.hg-hero h1 em{font-style:normal;background:linear-gradient(100deg,#f59e0b,#ea580c 60%,#e11d48);-webkit-background-clip:text;background-clip:text;color:transparent}
.hg-hero .lead{max-width:720px;font-size:18px;color:var(--muted);margin:0}
.hg-hero-grid{display:grid;grid-template-columns:minmax(0,1fr) 340px;gap:40px;align-items:end;margin-top:14px}
.hg-search{display:flex;align-items:center;gap:10px;margin-top:24px;max-width:620px;background:var(--surface);border:1px solid var(--line-2);border-radius:14px;padding:0 16px;box-shadow:0 8px 24px -18px rgba(15,23,42,.35)}
.hg-search svg{width:20px;height:20px;color:var(--faint);flex:none}
.hg-search input{flex:1;border:0;outline:0;background:transparent;font:inherit;font-size:16px;padding:14px 0;color:var(--ink)}
.hg-stats{display:flex;flex-wrap:wrap;gap:8px 22px;margin-top:18px;font-size:14px;color:var(--muted)}
.hg-stats b{color:var(--ink)}
.hg-author,.gd-author{display:flex;gap:14px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:18px;padding:18px}
.hg-author b,.gd-author b{display:block;margin-bottom:4px}
.hg-author span,.gd-author span{font-size:14px;color:var(--muted);line-height:1.55}
.hg-author a{display:inline-flex;align-items:center;gap:6px;margin-top:8px;font-size:14px;font-weight:600}
.hg-author a svg{width:15px;height:15px}
.hg-av{flex:none}.hg-av svg{width:44px;height:44px;display:block}
.hg-sec{padding:40px 0 80px;background:var(--bg-2)}
.hg-h2{font-size:24px;margin:8px 0 18px}
.hg-topics{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:12px;margin-bottom:40px}
.hg-topic{display:flex;gap:12px;align-items:center;padding:14px 16px;background:var(--surface);border:1px solid var(--line);border-radius:14px;text-decoration:none;color:var(--ink);transition:border-color .15s,box-shadow .15s}
.hg-topic:hover{border-color:var(--brand);box-shadow:0 8px 24px -16px rgba(234,88,12,.45)}
.hg-topic b{display:block;font-size:15px;line-height:1.3}.hg-topic small{color:var(--faint);font-size:13px}
.hg-topic-nt{background:var(--brand-soft);border-color:transparent}
.hg-feat{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px;margin-bottom:48px}
.hg-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}
.hg-grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.hg-card{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;text-decoration:none;color:var(--ink);transition:transform .15s,box-shadow .15s}
.hg-card:hover{transform:translateY(-2px);box-shadow:0 14px 34px -20px rgba(15,23,42,.35)}
.hg-card[hidden],.hg-group[hidden]{display:none}
.hg-thumb{display:block;aspect-ratio:16/9;background:#f1f5f9;border-bottom:1px solid var(--line);overflow:hidden}
.hg-thumb img{display:block;width:100%;height:100%;object-fit:cover;object-position:top}
.hg-body{display:flex;flex-direction:column;gap:6px;padding:14px 16px 16px;flex:1}
.hg-body b{font-size:15.5px;line-height:1.35}
.hg-card-big .hg-body b{font-size:17px}
.hg-desc{font-size:14px;color:var(--muted);line-height:1.5}
.hg-body small{margin-top:auto;padding-top:4px;color:var(--faint);font-size:12.5px}
.hg-group{margin-bottom:52px;scroll-margin-top:90px}
.hg-group-head{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;margin-bottom:18px}
.hg-group-head h2{display:flex;align-items:center;gap:10px;font-size:24px}
.hg-group-head h2 svg{width:22px;height:22px;color:var(--brand-ink)}
.hg-group-head p{margin:6px 0 0;color:var(--muted);font-size:15px;max-width:760px}
.hg-group-head .btn{flex:none}
.hg-group-nt{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:24px}
.hg-nt-cta{display:flex;align-items:center;gap:14px;margin-top:18px;padding:16px 18px;border-radius:14px;background:var(--brand-soft);color:var(--ink);text-decoration:none;font-size:15px}
.hg-nt-cta svg{width:20px;height:20px;flex:none;color:var(--brand-ink)}
.hg-nt-cta > span:nth-child(2){flex:1}
.hg-cta{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:30px;border-radius:22px;background:var(--ink);color:#fff}
.hg-cta h2{color:#fff;font-size:24px}.hg-cta p{margin:8px 0 0;color:#cbd5e1;max-width:620px}
.hg-cta-btns{display:flex;gap:10px;flex-wrap:wrap;flex:none}
.hg-cta .btn-ghost{background:transparent;color:#fff;border-color:#475569}
.hg-empty{padding:18px;background:var(--surface);border:1px dashed var(--line-2);border-radius:14px;margin-bottom:24px}
.hg-list{list-style:none;padding:0;margin:0 0 44px;display:grid;gap:14px}
.hg-row{display:grid;grid-template-columns:260px minmax(0,1fr);background:var(--surface);border:1px solid var(--line);border-radius:16px;overflow:hidden;text-decoration:none;color:var(--ink)}
.hg-row:hover{box-shadow:0 14px 34px -20px rgba(15,23,42,.35)}
.hg-row .hg-thumb{border-bottom:0;border-right:1px solid var(--line);aspect-ratio:auto;height:100%}
.hg-row .hg-body{padding:18px 20px}.hg-row .hg-body b{font-size:18px}
.hg-svcs{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:12px;margin-bottom:40px}
.hg-svc{display:flex;flex-direction:column;gap:6px;padding:16px;background:var(--surface);border:1px solid var(--line);border-radius:14px;text-decoration:none;color:var(--ink)}
.hg-svc span{font-size:14px;color:var(--muted)}
.gd-author{margin-top:28px}
.gd-next{margin-top:32px}.gd-next h2{font-size:20px;margin-bottom:14px}
@media (max-width:1000px){.hg-hero-grid{grid-template-columns:minmax(0,1fr)}.hg-topics,.hg-feat,.hg-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.hg-svcs{grid-template-columns:minmax(0,1fr)}}
@media (max-width:640px){.hg-topics{grid-template-columns:minmax(0,1fr)}.hg-feat,.hg-grid,.hg-grid-3{grid-template-columns:minmax(0,1fr)}
  .hg-group-head{flex-direction:column;align-items:flex-start}.hg-cta{flex-direction:column;align-items:flex-start;padding:22px}
  .hg-row{grid-template-columns:minmax(0,1fr)}.hg-row .hg-thumb{border-right:0;border-bottom:1px solid var(--line);aspect-ratio:16/9}.hg-group-nt{padding:16px}}
.gd-faq{margin-top:32px;scroll-margin-top:90px}.gd-faq h2{font-size:24px;margin-bottom:14px}
@media (max-width:640px){.hg-topics{grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}.hg-topic{padding:10px 12px;gap:10px}.hg-topic .ibox{width:30px;height:30px}.hg-topic .ibox svg{width:16px;height:16px}.hg-topic b{font-size:14px}}