/* ============================================================
   S4N EDITORIAL v2 — single + category, bo cuc 2 cot + sidebar
   Class tien to s4n-, token --s4n-* rieng (khong trung s4-/--s4- cua site).
   Nguon thiet ke: audit/xem-truoc/* + yeu cau chu du an 14/10.
   ============================================================ */

.s4n-wrap{
  --s4n-brand:var(--s4-oxblood,#8C1C2B);
  --s4n-brand-d:var(--s4-oxblood-dark,#6E1521);
  --s4n-graphite:var(--s4-charcoal,#17181B);
  --s4n-copper:var(--s4-copper,#B08D57);
  --s4n-paper:#fff;
  --s4n-line:var(--s4-border,#E4E2DD);
  --s4n-ink:var(--s4-charcoal,#17181B);
  --s4n-body:#3C3D42;
  --s4n-muted:var(--s4-muted,#6B6C70);
  --s4n-soft:#F7F6F4;
  --s4n-serif:"Newsreader",Georgia,"Times New Roman",serif;
  --s4n-sans:"Be Vietnam Pro",-apple-system,"Segoe UI",Roboto,Arial,sans-serif;
  font-family:var(--s4n-sans);color:var(--s4n-body);line-height:1.7;
  max-width:1180px;margin:0 auto;padding:0 20px 48px;-webkit-font-smoothing:antialiased;
}
.s4n-wrap *{box-sizing:border-box}
body.s4n-active #content{padding-top:0}

/* ---------- cot ---------- */
.s4n-cols{display:grid;grid-template-columns:minmax(0,1fr) 322px;gap:40px;align-items:start;margin-top:8px}
.s4n-main{min-width:0}
.s4n-aside{position:sticky;top:86px;align-self:start;display:flex;flex-direction:column;gap:18px}
@media(max-width:980px){
  .s4n-cols{grid-template-columns:1fr;gap:26px}
  .s4n-aside{position:static;top:auto}
}

/* ---------- breadcrumb ---------- */
.s4n-bc{display:flex;flex-wrap:wrap;gap:7px;align-items:center;font-size:12.5px;color:var(--s4n-muted);padding:18px 0 4px}
.s4n-bc a{color:var(--s4n-muted);text-decoration:none;display:inline-flex;align-items:center;gap:5px}
.s4n-bc a:hover{color:var(--s4n-brand)}
.s4n-bc svg{width:13px;height:13px;opacity:.55;flex:none}
.s4n-bc .s4n-bc-home svg{width:15px;height:15px;opacity:.8}
.s4n-bc .s4n-cur{color:var(--s4n-ink);font-weight:500}

/* ---------- meta / title / author (single) ---------- */
.s4n-meta{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin:14px 0 14px}
.s4n-wrap a.s4n-cat{display:inline-block;background:var(--s4n-brand)!important;color:#fff!important;font-size:11.5px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;padding:6px 13px;border-radius:999px;text-decoration:none;border:0;box-shadow:none}
.s4n-wrap a.s4n-cat:hover{background:var(--s4n-brand-d)!important;color:#fff!important}
.s4n-read{display:inline-flex;align-items:center;gap:6px;font-size:13px;color:var(--s4n-muted)}
.s4n-read svg{width:15px;height:15px}
h1.s4n-h1{font-family:var(--s4n-serif);font-weight:700;font-size:clamp(27px,4.2vw,38px);line-height:1.2;color:var(--s4n-ink);margin:0 0 18px;letter-spacing:-.01em;text-wrap:balance}
.s4n-auth{display:flex;align-items:center;gap:12px;padding:0 0 18px;border-bottom:1px solid var(--s4n-line);margin:0 0 22px}
.s4n-auth .s4n-avt{width:46px;height:46px;border-radius:50%;flex:none;background:var(--s4n-brand);display:inline-flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.s4n-auth .s4n-avt::before{content:"B";font-family:var(--s4n-serif);font-weight:700;font-size:20px;color:#fff}
.s4n-auth .s4n-avt img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:50%}
.s4n-auth .s4n-n{font-weight:600;color:var(--s4n-ink);font-size:15px}
.s4n-auth .s4n-r{font-size:13px;color:var(--s4n-muted)}
.s4n-auth .s4n-r b{color:var(--s4n-copper);font-weight:600}

/* ---------- cover ---------- */
.s4n-cover{width:100%;aspect-ratio:1200/630;border-radius:12px;overflow:hidden;margin:0 0 6px;background:linear-gradient(135deg,var(--s4n-graphite),#2a2b30);position:relative;display:flex;align-items:center;padding:28px 30px}
.s4n-cover-img{display:block;padding:0;background:none}
.s4n-cover-img img{width:100%;height:100%;object-fit:cover;display:block}
.s4n-cover-bd{color:#fff;max-width:64%}
.s4n-ey{display:inline-block;background:var(--s4n-brand);color:#fff;font-size:10.5px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;padding:4px 10px;border-radius:5px;margin:0 0 12px}
.s4n-cover-t{font-family:var(--s4n-serif);font-size:clamp(20px,3.4vw,28px);font-weight:700;line-height:1.14;margin:0;color:#fff}
.s4n-cover-ln{height:3px;width:52px;background:var(--s4n-copper);margin:14px 0 0;border-radius:2px}
.s4n-cover-mk{position:absolute;right:24px;bottom:22px;font-weight:700;color:rgba(255,255,255,.85);font-size:13px;letter-spacing:.04em}

/* ---------- body ---------- */
.s4n-body{font-size:16.5px;color:var(--s4n-body);margin-top:24px}
.s4n-body h2{font-family:var(--s4n-serif);font-size:23px;color:var(--s4n-ink);margin:32px 0 12px;font-weight:700;scroll-margin-top:100px}
.s4n-body h3{font-family:var(--s4n-serif);font-size:18.5px;color:var(--s4n-ink);margin:22px 0 10px;font-weight:700;scroll-margin-top:100px}
.s4n-body p{margin:0 0 16px}
.s4n-body img{max-width:100%;height:auto;border-radius:8px}
.s4n-body strong{color:var(--s4n-ink)}
.s4n-body a{color:var(--s4n-brand);text-decoration:underline;text-underline-offset:2px}
.s4n-body table{width:100%;border-collapse:collapse;margin:0 0 18px;font-size:15px}
.s4n-body th,.s4n-body td{border:1px solid var(--s4n-line);padding:9px 12px;text-align:left}
.s4n-body th{background:var(--s4n-soft)}
.s4n-body ul,.s4n-body ol{margin:0 0 16px;padding-left:22px}
.s4n-body li{margin:7px 0;padding-left:2px}
.s4n-body ul>li::marker{color:var(--s4n-brand)}
.s4n-body ol>li::marker{color:var(--s4n-copper);font-weight:700}
.s4n-body blockquote{border-left:3px solid var(--s4n-brand);background:var(--s4n-soft);margin:0 0 18px;padding:14px 18px;border-radius:0 8px 8px 0;color:var(--s4n-ink)}
.s4n-body blockquote p:last-child{margin-bottom:0}

/* ---------- author box ---------- */
.s4n-authorbox{background:var(--s4n-soft);border:1px solid var(--s4n-line);border-left:3px solid var(--s4n-brand);border-radius:12px;padding:22px;margin:36px 0 8px}
.s4n-ab-hd{display:flex;gap:16px;align-items:flex-start}
.s4n-ab-avt{width:76px;height:76px;border-radius:50%;flex:none;background:var(--s4n-brand);display:inline-flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.s4n-ab-avt::before{content:"B";font-family:var(--s4n-serif);font-weight:700;font-size:32px;color:#fff}
.s4n-ab-avt img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;border-radius:50%}
.s4n-ab-lb{font-size:11px;font-weight:700;letter-spacing:.07em;text-transform:uppercase;color:var(--s4n-copper);margin:0 0 3px}
.s4n-ab-nm{font-size:19px;font-weight:700;color:var(--s4n-ink);margin:0 0 2px}
.s4n-ab-ro{font-size:13.5px;color:var(--s4n-muted);margin:0 0 10px}
.s4n-ab-bio{font-size:14px;color:var(--s4n-body);margin:0 0 14px;line-height:1.6}
.s4n-chips{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 14px}
.s4n-chip{font-size:12.5px;font-weight:600;color:var(--s4n-brand);border:1px solid var(--s4n-line);background:var(--s4n-paper);border-radius:999px;padding:5px 13px}
.s4n-profile{display:inline-flex;align-items:center;gap:5px;font-weight:700;color:var(--s4n-brand);text-decoration:none;font-size:14px}
.s4n-profile svg{width:15px;height:15px}
.s4n-soc{display:flex;flex-wrap:wrap;gap:16px;margin:14px 0 0;padding:14px 0 0;border-top:1px solid var(--s4n-line)}
.s4n-soc a{font-size:13px;color:var(--s4n-muted);text-decoration:none;font-weight:500}
.s4n-soc a:hover{color:var(--s4n-brand)}
@media(max-width:560px){.s4n-ab-hd{flex-direction:column}.s4n-cover-bd{max-width:100%}}

/* ---------- khoi sidebar chung ---------- */
.s4n-side{background:var(--s4n-paper);border:1px solid var(--s4n-line);border-radius:12px;padding:16px 16px}
.s4n-side-t{font-weight:700;color:var(--s4n-ink);font-size:15px;margin:0 0 4px}
.s4n-side-sub{font-size:12.5px;color:var(--s4n-muted);margin:0 0 12px;line-height:1.5}

/* ---------- muc luc ---------- */
.s4n-toc .s4n-toc-ti{display:flex;align-items:center;gap:8px;font-weight:700;color:var(--s4n-ink);font-size:14px;margin:0}
.s4n-toc .s4n-toc-ti svg{width:16px;height:16px;color:var(--s4n-brand);flex:none}
.s4n-toc .s4n-toc-ti span{flex:1}
.s4n-toc-toggle{background:none;border:0;cursor:pointer;color:var(--s4n-muted);padding:4px;line-height:0;border-radius:6px}
.s4n-toc-toggle svg{width:16px;height:16px;transition:transform .2s}
.s4n-toc.s4n-collapsed .s4n-toc-toggle svg{transform:rotate(-90deg)}
.s4n-toc-body{margin-top:10px}
.s4n-toc.s4n-collapsed .s4n-toc-body{display:none}
.s4n-toc-side .s4n-toc-body{max-height:58vh;overflow:auto}
.s4n-toc-ol,.s4n-toc .s4n-sub{list-style:none;margin:0;padding:0;color:var(--s4n-body)}
.s4n-toc-ol{counter-reset:s4ntoc}
.s4n-toc-ol>li.s4n-toc-l2{counter-increment:s4ntoc;position:relative;padding-left:24px;margin:6px 0;font-size:13.5px;line-height:1.4}
.s4n-toc-ol>li.s4n-toc-l2>a::before{content:counter(s4ntoc)".";position:absolute;left:0;color:var(--s4n-copper);font-weight:700}
.s4n-toc .s4n-sub{display:none;margin:4px 0 8px 0}
.s4n-toc li.s4n-toc-l2.s4n-open>.s4n-sub{display:block}
.s4n-toc .s4n-sub li{position:relative;padding-left:16px;margin:2px 0;font-size:13px;line-height:1.4}
.s4n-toc .s4n-sub li::before{content:"";position:absolute;left:2px;top:8px;width:5px;height:5px;border-radius:50%;background:var(--s4n-muted)}
.s4n-toc a{color:var(--s4n-body);text-decoration:none;display:block}
.s4n-toc a:hover{color:var(--s4n-brand)}
.s4n-toc li.s4n-cur>a{color:var(--s4n-brand);font-weight:600}
.s4n-toc li.s4n-cur>a::before{color:var(--s4n-brand)}
.s4n-toc li.s4n-cur .s4n-sub li::before,.s4n-toc .s4n-sub li.s4n-cur::before{background:var(--s4n-brand)}
.s4n-toc-side{display:block}
.s4n-toc-mobile{display:none;margin:22px 0 0;background:var(--s4n-soft)}
@media(max-width:980px){.s4n-toc-side{display:none}.s4n-toc-mobile{display:block}}

/* ---------- khoi tu van ---------- */
.s4n-consult{background:linear-gradient(160deg,var(--s4n-brand),var(--s4n-brand-d));border:0;color:#fff}
.s4n-consult .s4n-side-t{color:#fff}
.s4n-consult .s4n-side-sub{color:rgba(255,255,255,.85)}
.s4n-tel{display:flex;align-items:center;gap:11px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);border-radius:10px;padding:9px 12px;margin:0 0 9px;text-decoration:none}
.s4n-tel:hover{background:rgba(255,255,255,.18)}
.s4n-tel-ic{width:34px;height:34px;border-radius:50%;background:#fff;color:var(--s4n-brand);display:inline-flex;align-items:center;justify-content:center;flex:none}
.s4n-tel-ic svg{width:17px;height:17px}
.s4n-tel-tx{display:flex;flex-direction:column;line-height:1.2}
.s4n-tel-rg{font-size:11px;color:rgba(255,255,255,.8)}
.s4n-tel-no{font-size:17px;font-weight:700;color:#fff;letter-spacing:.01em}
.s4n-zalo{display:block;text-align:center;background:#fff;color:var(--s4n-brand);font-weight:700;font-size:14px;border-radius:9px;padding:10px;text-decoration:none;margin-top:3px}
.s4n-zalo:hover{background:var(--s4n-soft)}

/* ---------- form bao gia ---------- */
.s4n-quote .s4n-quote-form{display:flex;flex-direction:column;gap:9px}
.s4n-quote input,.s4n-quote textarea{border:1px solid var(--s4n-line);border-radius:9px;padding:10px 12px;font:inherit;font-size:14px;color:var(--s4n-ink);background:var(--s4n-soft);width:100%}
.s4n-quote input:focus,.s4n-quote textarea:focus{outline:none;border-color:var(--s4n-brand);background:#fff}
.s4n-quote textarea{resize:vertical;min-height:52px}
.s4n-hp{position:absolute;left:-9999px;width:1px;height:1px;opacity:0}
.s4n-quote button{background:var(--s4n-brand);color:#fff;border:0;border-radius:9px;padding:11px;font:inherit;font-weight:700;font-size:14.5px;cursor:pointer}
.s4n-quote button:hover{background:var(--s4n-brand-d)}
.s4n-quote button:disabled{opacity:.6;cursor:default}
.s4n-form-msg{font-size:13px;margin-top:2px;min-height:0}
.s4n-form-msg.ok{color:#1a7f37}
.s4n-form-msg.err{color:var(--s4n-brand)}

/* ---------- danh sach bai (lien quan / noi bat) ---------- */
/* reset list chong Flatsome (bullets/padding/margin toan cuc) */
.s4n-aside .s4n-postlist,.s4n-aside .s4n-postlist li,.s4n-aside .s4n-catul,.s4n-aside .s4n-catul li{list-style:none;margin:0;padding:0}
.s4n-aside .s4n-postlist li::before,.s4n-aside .s4n-catul li::before{content:none}
.s4n-postlist{margin:10px 0 0}
.s4n-postlist li{margin:0 0 11px}
.s4n-postlist li:last-child{margin-bottom:0}
.s4n-postlist a{display:flex;gap:10px;align-items:center;text-decoration:none}
.s4n-pl-im{width:58px;height:46px;border-radius:8px;overflow:hidden;flex:none;background:var(--s4n-soft);display:flex;align-items:center;justify-content:center}
.s4n-pl-im img{width:100%;height:100%;object-fit:cover;display:block}
.s4n-pl-tt{font-size:13px;font-weight:600;color:var(--s4n-ink);line-height:1.35}
.s4n-postlist a:hover .s4n-pl-tt{color:var(--s4n-brand)}
/* placeholder giot dau brand khi thieu anh */
.s4n-pl-ph{display:flex;align-items:center;justify-content:center;width:100%;height:100%;color:var(--s4n-copper);background:var(--s4n-soft)}
.s4n-pl-ph svg{width:20px;height:20px;opacity:.7}
.s4n-pg-im .s4n-pl-ph svg{width:34px;height:34px}

/* ---------- danh sach chuyen muc ---------- */
.s4n-catul{list-style:none;margin:8px 0 0;padding:0}
.s4n-catul li{margin:0}
.s4n-catul a{display:flex;justify-content:space-between;align-items:center;padding:8px 0;border-bottom:1px solid var(--s4n-line);color:var(--s4n-body);text-decoration:none;font-size:14px;font-weight:500}
.s4n-catul li:last-child a{border-bottom:0}
.s4n-catul a:hover{color:var(--s4n-brand)}
.s4n-catul a span{font-size:12px;color:var(--s4n-muted);background:var(--s4n-soft);border-radius:999px;padding:2px 9px;min-width:26px;text-align:center}
.s4n-catul li.s4n-on a{color:var(--s4n-brand);font-weight:700}

/* ============================================================
   CATEGORY
   ============================================================ */
.s4n-wrap .s4n-hero{display:block}
.s4n-hero{display:block;margin:8px 0 26px;border-radius:16px;overflow:hidden;position:relative;background:linear-gradient(135deg,var(--s4n-brand) 0%,var(--s4n-brand-d) 55%,var(--s4n-graphite) 100%);padding:36px 32px}
@media(min-width:800px){.s4n-hero{padding:44px 44px}}
.s4n-hero::after{content:"";position:absolute;right:-40px;top:-40px;width:230px;height:230px;border-radius:50%;border:2px solid rgba(255,255,255,.12)}
.s4n-hero>h1,.s4n-hero>.s4n-hero-cnt,.s4n-hero>.s4n-hero-desc{display:block;float:none;clear:both;width:100%;text-align:left;position:relative;z-index:1}
.s4n-hero h1{font-family:var(--s4n-serif);color:#fff;font-size:clamp(28px,5vw,44px);margin:0 0 10px;font-weight:700;letter-spacing:-.01em}
.s4n-hero>.s4n-hero-cnt{display:inline-block;width:auto;background:rgba(255,255,255,.14);color:#fff;font-weight:600;font-size:13px;letter-spacing:.03em;margin:0 0 14px;padding:4px 13px;border-radius:999px}
.s4n-hero-desc{color:rgba(255,255,255,.9);max-width:620px;font-size:15.5px;line-height:1.65;margin:0}
.s4n-hero-desc a{color:#fff;text-decoration:underline;text-underline-offset:3px;font-weight:600}

.s4n-catchips{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 20px}
.s4n-chip-lnk{font-size:13.5px;font-weight:600;color:var(--s4n-body);border:1px solid var(--s4n-line);background:var(--s4n-paper);border-radius:999px;padding:8px 16px;text-decoration:none;transition:all .18s}
.s4n-chip-lnk:hover{border-color:var(--s4n-brand);color:var(--s4n-brand)}
.s4n-chip-lnk.s4n-on{background:var(--s4n-graphite);color:#fff;border-color:var(--s4n-graphite)}

.s4n-search{display:flex;align-items:center;gap:10px;border:1px solid var(--s4n-line);border-radius:10px;padding:4px 4px 4px 14px;max-width:520px;background:var(--s4n-paper);margin:0 0 24px}
.s4n-search svg{width:18px;height:18px;color:var(--s4n-muted);flex:none}
.s4n-search input{border:0;outline:0;flex:1;font:inherit;font-size:15px;padding:10px 0;background:transparent;color:var(--s4n-ink)}
.s4n-search button{background:var(--s4n-brand);color:#fff;border:0;border-radius:8px;padding:10px 18px;font:inherit;font-weight:600;font-size:14px;cursor:pointer}
.s4n-search button:hover{background:var(--s4n-brand-d)}

.s4n-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(228px,1fr));gap:18px}
.s4n-pg{border:1px solid var(--s4n-line);border-radius:12px;overflow:hidden;text-decoration:none;display:block;background:var(--s4n-paper);transition:border-color .18s,box-shadow .18s}
.s4n-pg:hover{border-color:var(--s4n-brand);box-shadow:0 6px 20px rgba(140,28,43,.08)}
.s4n-pg-im{display:block;aspect-ratio:16/10;background:var(--s4n-soft);overflow:hidden}
.s4n-pg-im img{width:100%;height:100%;object-fit:cover;display:block}
.s4n-pg-bd{display:block;padding:12px 14px}
.s4n-pg-cc{display:block;font-size:11px;font-weight:700;color:var(--s4n-brand);text-transform:uppercase;letter-spacing:.05em}
.s4n-pg-hh{display:block;font-size:14.5px;font-weight:600;color:var(--s4n-ink);margin:5px 0 0;line-height:1.35}

.s4n-pager{margin:28px 0 0}
.s4n-pager .page-numbers{display:inline-block;padding:7px 13px;margin:0 3px 6px;border:1px solid var(--s4n-line);border-radius:8px;color:var(--s4n-body);text-decoration:none;font-size:14px}
.s4n-pager .page-numbers.current{background:var(--s4n-brand);color:#fff;border-color:var(--s4n-brand)}
.s4n-pager .page-numbers:hover{border-color:var(--s4n-brand)}
.s4n-empty{color:var(--s4n-muted);padding:20px 0}

a,.s4n-pg,.s4n-chip-lnk,.s4n-tel,.s4n-zalo{transition:color .18s ease,border-color .18s ease,background .18s ease}
@media(prefers-reduced-motion:reduce){.s4n-wrap *{transition:none!important}}