/* s4sync — than trang dong bo toan site daunhots4.vn (phieu 07, LIVE theme)
   Bố cục s4rd + bảng màu site đã chốt 13/10 (biến lấy từ css/s4n-site.css).
   Mọi selector nằm dưới .s4s để không đụng header/footer Flatsome. */
.s4s{
  --ox:var(--s4-oxblood,#8C1C2B); --ox-dk:#6E1521; --ox-tint:#F6ECEC;
  --ch:var(--s4-charcoal,#17181B); --ch2:#202228; --ch3:#3C3D42;
  --mut:#6B6C70; --mut2:#A7A8AC; --line:#E4E2DD; --cream:#F7F6F4; --cream2:#E9E7E3;
  --cop:var(--s4-copper,#B08D57); --cop-tint:#F4EEE4; --ok:#2E7D4F; --ok-tint:#E9F3EC;
  --head:"Barlow Semi Condensed","Be Vietnam Pro",Arial,sans-serif;
  --body:"Be Vietnam Pro",system-ui,Arial,sans-serif;
  --mono:"JetBrains Mono",ui-monospace,Consolas,monospace;
  --r:12px; --sh:0 1px 2px rgba(23,24,27,.06),0 10px 28px -16px rgba(23,24,27,.28);
  font-family:var(--body); color:var(--ch); font-size:16px; line-height:1.65; background:#fff;
}
.s4s *{box-sizing:border-box}
.s4s img{max-width:100%;height:auto;display:block}
.s4s a{color:inherit;text-decoration:none}
.s4s h1,.s4s h2,.s4s h3,.s4s h4{font-family:var(--head);color:var(--ch);line-height:1.15;margin:0;letter-spacing:.1px;text-transform:none}
.s4s p{margin:0 0 12px}
.s4s-wrap{max-width:1200px;margin:0 auto;padding:0 20px}
.s4s-sec{padding:44px 0}
.s4s-sec.alt{background:var(--cream)}
.s4s-sec.dark{background:var(--ch);color:#E9E7E3}
.s4s-sec.dark h2,.s4s-sec.dark h3{color:#fff}
.s4s-eyebrow{font-family:var(--head);font-weight:700;font-size:13px;letter-spacing:1.4px;text-transform:uppercase;color:var(--ox);display:inline-block;margin-bottom:6px}
.s4s-sec.dark .s4s-eyebrow{color:var(--cop)}
.s4s-head{display:flex;align-items:flex-end;justify-content:space-between;gap:16px;margin-bottom:22px;flex-wrap:wrap}
.s4s-head h2{font-size:30px;font-weight:700}
.s4s-head p{color:var(--mut);margin:6px 0 0;max-width:640px}
.s4s-more{font-family:var(--head);font-weight:700;color:var(--ox);white-space:nowrap;border-bottom:1.5px solid currentColor;padding-bottom:1px}
.s4s-btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:12px 20px;border-radius:10px;font-family:var(--head);font-weight:700;font-size:16px;letter-spacing:.3px;border:1.5px solid transparent;cursor:pointer;transition:background .15s,border-color .15s,transform .15s}
.s4s-btn:hover{transform:translateY(-1px)}
.s4s-btn:focus-visible,.s4s a:focus-visible,.s4s summary:focus-visible,.s4s label:focus-visible{outline:2px solid var(--cop);outline-offset:2px}
.s4s-btn.pri{background:var(--ox);color:#fff}
.s4s-btn.pri:hover{background:var(--ox-dk)}
.s4s-btn.ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.45)}
.s4s-btn.ghost:hover{border-color:#fff}
.s4s-btn.line{background:#fff;color:var(--ch);border-color:var(--line)}
.s4s-btn.line:hover{border-color:var(--ch3)}
.s4s-mono{font-family:var(--mono)}
.s4s-badge{display:inline-flex;align-items:center;font-family:var(--mono);font-size:11.5px;font-weight:500;padding:3px 8px;border-radius:6px;background:var(--cream);border:1px solid var(--line);color:var(--ch3)}
.s4s-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);box-shadow:var(--sh)}

/* HERO — ảnh thật, phủ than chì */
.s4s-hero{position:relative;color:#fff;background:var(--ch)}
.s4s-hero-in{display:grid;grid-template-columns:1.55fr 1fr;gap:14px;padding:18px 0}
.s4s-hero-main{position:relative;border-radius:14px;overflow:hidden;min-height:420px;display:flex;align-items:flex-end;background-size:cover;background-position:center}
.s4s-hero-main::before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(23,24,27,.92) 0%,rgba(23,24,27,.72) 45%,rgba(23,24,27,.15) 100%)}
.s4s-hero-copy{position:relative;padding:34px;max-width:640px}
.s4s-hero-tag{display:inline-block;background:var(--ox);color:#fff;font-family:var(--head);font-weight:700;font-size:12.5px;letter-spacing:1px;text-transform:uppercase;padding:5px 11px;border-radius:6px;margin-bottom:14px}
.s4s-hero h1{color:#fff;font-size:42px;font-weight:700;line-height:1.08}
.s4s-hero-sub{color:#D8D6D1;font-size:17px;margin:14px 0 22px}
.s4s-hero-cta{display:flex;gap:10px;flex-wrap:wrap}
.s4s-hero-side{display:grid;grid-template-rows:1fr 1fr;gap:14px}
.s4s-tile{position:relative;border-radius:14px;overflow:hidden;min-height:200px;display:flex;align-items:flex-end;background-size:cover;background-position:center}
.s4s-tile::before{content:"";position:absolute;inset:0;background:linear-gradient(0deg,rgba(23,24,27,.85),rgba(23,24,27,.05) 65%)}
.s4s-tile span{position:relative;padding:16px 18px;font-family:var(--head);font-weight:700;font-size:20px;color:#fff}
.s4s-tile small{display:block;font-family:var(--body);font-weight:400;font-size:13px;color:#D8D6D1}
.s4s-usp{background:#fff;border-bottom:1px solid var(--line)}
.s4s-usp-in{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;padding:16px 0}
.s4s-usp-it{display:flex;gap:11px;align-items:center;font-size:14px;color:var(--ch3)}
.s4s-usp-it b{display:block;font-family:var(--head);font-size:15.5px;color:var(--ch)}
.s4s-ic{width:38px;height:38px;flex:none;border-radius:10px;background:var(--ox-tint);color:var(--ox);display:grid;place-items:center}
.s4s-ic svg{width:20px;height:20px;stroke:currentColor;stroke-width:1.8;fill:none;stroke-linecap:round;stroke-linejoin:round}

/* LIST CHUYÊN MỤC */
.s4s-cats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.s4s-cat{display:grid;grid-template-columns:96px 1fr;gap:14px;align-items:center;padding:12px;transition:border-color .15s,box-shadow .15s}
.s4s-cat:hover{border-color:var(--cop)}
.s4s-cat img{width:96px;height:96px;object-fit:cover;border-radius:9px;background:var(--cream)}
.s4s-cat h3{font-size:19px;font-weight:700}
.s4s-cat .n{font-family:var(--mono);font-size:12px;color:var(--ox);margin:2px 0 4px}
.s4s-cat p{font-size:13.5px;color:var(--mut);margin:0;line-height:1.5}

/* TAB SẢN PHẨM — chạy không cần JS (radio) */
.s4s-tabs>input{position:absolute;opacity:0;pointer-events:none}
.s4s-tabbar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.s4s-tabbar label{min-height:44px;display:inline-flex;align-items:center;padding:10px 16px;border-radius:999px;border:1.5px solid var(--line);background:#fff;font-family:var(--head);font-weight:700;font-size:15px;color:var(--ch3);cursor:pointer}
.s4s-tabbar label .c{font-family:var(--mono);font-weight:500;font-size:12px;color:var(--mut);margin-left:6px}
.s4s-panel{display:none}
#t1:checked~.s4s-tabbar label[for=t1],#t2:checked~.s4s-tabbar label[for=t2],#t3:checked~.s4s-tabbar label[for=t3],#t4:checked~.s4s-tabbar label[for=t4]{background:var(--ch);border-color:var(--ch);color:#fff}
#t1:checked~.s4s-tabbar label[for=t1] .c,#t2:checked~.s4s-tabbar label[for=t2] .c,#t3:checked~.s4s-tabbar label[for=t3] .c,#t4:checked~.s4s-tabbar label[for=t4] .c{color:var(--cop)}
#t1:checked~.p1,#t2:checked~.p2,#t3:checked~.p3,#t4:checked~.p4{display:block}
.s4s-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.s4s-pc{display:flex;flex-direction:column;overflow:hidden;transition:box-shadow .15s,transform .15s}
.s4s-pc:hover{transform:translateY(-2px);box-shadow:0 18px 36px -20px rgba(23,24,27,.45)}
.s4s-pc .im{aspect-ratio:1/1;background:var(--cream);overflow:hidden}
.s4s-pc .im img{width:100%;height:100%;object-fit:cover}
.s4s-pc .bd{padding:13px 14px 14px;display:flex;flex-direction:column;gap:7px;flex:1}
.s4s-pc .ct{font-size:11.5px;font-weight:700;letter-spacing:.6px;text-transform:uppercase;color:var(--ox)}
.s4s-pc h3{font-size:16.5px;font-weight:700;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;min-height:38px}
.s4s-pc .bg{display:flex;gap:5px;flex-wrap:wrap;min-height:22px}
.s4s-pc .ft{margin-top:auto;display:flex;justify-content:space-between;align-items:center;padding-top:6px;border-top:1px solid var(--line)}
.s4s-pc .pr{font-family:var(--head);font-weight:700;font-size:14.5px}
.s4s-pc .go{font-family:var(--head);font-weight:700;font-size:13.5px;color:var(--ox)}
.s4s-panel-ft{margin-top:16px;text-align:right}

/* SỐ LIỆU THẬT */
.s4s-stats{display:grid;grid-template-columns:repeat(6,1fr);gap:12px;margin-top:6px}
.s4s-stat{border:1px solid #2E3036;border-radius:12px;padding:18px 10px;text-align:center;background:var(--ch2)}
.s4s-stat b{display:block;font-family:var(--head);font-weight:700;font-size:32px;color:var(--cop);line-height:1}
.s4s-stat span{display:block;font-size:12.5px;color:var(--mut2);margin-top:6px}
.s4s-why{display:grid;grid-template-columns:1.1fr 1fr;gap:34px;align-items:center}
.s4s-why ul{list-style:none;margin:16px 0 0;padding:0;display:grid;gap:12px}
.s4s-why li{display:flex;gap:11px;font-size:15px;color:#D8D6D1}
.s4s-why li svg{width:20px;height:20px;flex:none;margin-top:3px;stroke:var(--cop);stroke-width:2;fill:none}
.s4s-why figure{margin:0;border-radius:14px;overflow:hidden}
.s4s-why figcaption{font-size:12.5px;color:var(--mut2);padding-top:8px}

/* BẢNG */
.s4s-table{width:100%;border-collapse:collapse;font-size:14.5px;background:#fff;border-radius:10px;overflow:hidden;border:1px solid var(--line)}
.s4s-table th,.s4s-table td{padding:11px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.s4s-table thead th{background:var(--ch);color:#fff;font-family:var(--head);font-weight:600;font-size:14.5px}
.s4s-table td.v{font-family:var(--mono);white-space:nowrap}
.s4s-src{font-size:12.5px;color:var(--mut);margin-top:10px}

/* PROSE (khối chữ SEO) */
.s4s-prose{max-width:820px}
.s4s-prose h2{font-size:28px;margin-bottom:14px}
.s4s-prose h3{font-size:21px;margin:22px 0 8px}
.s4s-prose p{font-size:16.5px;color:var(--ch3)}
.s4s-prose ul{padding-left:20px;margin:0 0 14px;color:var(--ch3)}
.s4s-prose li{margin-bottom:6px}
.s4s-two{display:grid;grid-template-columns:1fr 360px;gap:36px;align-items:start}
.s4s-aside{position:sticky;top:110px;padding:20px}
.s4s-aside h3{font-size:18px;margin-bottom:10px}
.s4s-aside dl{margin:0;font-size:14px}
.s4s-aside dt{color:var(--mut);margin-top:10px}
.s4s-aside dd{margin:2px 0 0;font-weight:600}

/* BÀI VIẾT + THƯ VIỆN */
.s4s-posts{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.s4s-post{overflow:hidden}
.s4s-post .im{aspect-ratio:16/10;background:var(--cream)}
.s4s-post .im img{width:100%;height:100%;object-fit:cover}
.s4s-post .bd{padding:12px 14px}
.s4s-post h3{font-size:16px;font-weight:700;line-height:1.3;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.s4s-gal{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.s4s-gal figure{margin:0;position:relative;border-radius:10px;overflow:hidden;aspect-ratio:4/3}
.s4s-gal img{width:100%;height:100%;object-fit:cover}
.s4s-gal figcaption{position:absolute;left:0;right:0;bottom:0;padding:22px 10px 8px;font-size:12px;color:#fff;background:linear-gradient(0deg,rgba(23,24,27,.8),transparent)}

/* FAQ — details/summary, không JS */
.s4s-faq{max-width:860px}
.s4s-faq details{background:#fff;border:1px solid var(--line);border-radius:11px;margin-bottom:10px}
.s4s-faq summary{list-style:none;cursor:pointer;padding:16px 50px 16px 18px;position:relative;font-family:var(--head);font-weight:700;font-size:17px;color:var(--ch);min-height:44px}
.s4s-faq summary::-webkit-details-marker{display:none}
.s4s-faq summary::after{content:"+";position:absolute;right:18px;top:12px;font-size:24px;color:var(--ox);transition:transform .2s}
.s4s-faq details[open] summary::after{transform:rotate(45deg)}
.s4s-faq details>div{padding:0 18px 16px;color:var(--ch3);font-size:15.5px}

/* CTA */
.s4s-cta{background:var(--ox);color:#fff;border-radius:16px;padding:32px;display:grid;grid-template-columns:1.3fr 1fr;gap:24px;align-items:center}
.s4s-cta h2{color:#fff;font-size:28px}
.s4s-cta p{color:#F1DADC;margin:8px 0 0}
.s4s-cta-box{display:grid;gap:10px}
.s4s-cta-row{display:flex;justify-content:space-between;gap:12px;align-items:center;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.22);border-radius:10px;padding:12px 14px}
.s4s-cta-row b{font-family:var(--head);font-size:21px}
.s4s-cta-row span{font-size:13px;color:#F1DADC}

/* GIỚI THIỆU */
.s4s-page-hero{padding:34px 0 10px}
.s4s-page-hero h1{font-size:40px;font-weight:700}
.s4s-page-hero .lead{font-size:18px;color:var(--ch3);max-width:760px;margin-top:12px}
.s4s-crumb{font-size:13.5px;color:var(--mut);margin-bottom:12px}
.s4s-crumb a:hover{color:var(--ox)}
.s4s-split{display:grid;grid-template-columns:1fr 1fr;gap:36px;align-items:center}
.s4s-split figure{margin:0}
.s4s-split figure img{border-radius:14px;width:100%;aspect-ratio:4/3;object-fit:cover}
.s4s-split figcaption{font-size:13px;color:var(--mut);margin-top:8px}
.s4s-tl{position:relative;display:grid;gap:0;margin-top:10px}
.s4s-tl-it{display:grid;grid-template-columns:90px 1fr;gap:20px;padding:14px 0;border-bottom:1px dashed var(--line)}
.s4s-tl-it b{font-family:var(--head);font-weight:700;font-size:24px;color:var(--ox)}
.s4s-tl-it p{margin:3px 0 0;color:var(--ch3)}
.s4s-three{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.s4s-three .s4s-card{padding:20px}
.s4s-three h3{font-size:20px;margin-bottom:8px}
.s4s-three p{color:var(--mut);font-size:15px;margin:0}
.s4s-proof{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.s4s-proof figure{margin:0}
.s4s-proof img{border-radius:12px;aspect-ratio:4/3;object-fit:cover;width:100%}
.s4s-proof figcaption{font-size:13px;color:var(--mut);margin-top:6px}
.s4s-legal{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.s4s-legal div{padding:16px;border-radius:11px;background:var(--cream);border:1px solid var(--line)}
.s4s-legal dt{font-size:12.5px;color:var(--mut)}
.s4s-legal dd{margin:3px 0 0;font-weight:700;font-family:var(--head);font-size:17px}

/* TÁC GIẢ */
.s4s-prof{display:grid;grid-template-columns:280px 1fr;gap:36px;align-items:center}
.s4s-prof img{border-radius:16px;aspect-ratio:4/5;object-fit:cover;width:100%}
.s4s-prof .role{font-family:var(--head);font-weight:700;font-size:17px;color:var(--ox);margin-top:6px}
.s4s-chips{display:flex;gap:8px;flex-wrap:wrap;margin:16px 0}
.s4s-chips span{padding:7px 12px;border-radius:999px;background:var(--cream);border:1px solid var(--line);font-size:13.5px;font-weight:600;color:var(--ch3)}
.s4s-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:6px}
.s4s-facts div{padding:14px;border-left:3px solid var(--cop);background:var(--cream);border-radius:0 10px 10px 0}
.s4s-facts b{display:block;font-family:var(--head);font-size:22px;color:var(--ch)}
.s4s-facts span{font-size:13px;color:var(--mut)}
.s4s-alist{display:grid;grid-template-columns:repeat(2,1fr);gap:10px}
.s4s-alist a{display:flex;justify-content:space-between;gap:12px;padding:13px 16px;border:1px solid var(--line);border-radius:10px;background:#fff;font-weight:600;font-size:15px}
.s4s-alist a:hover{border-color:var(--ox);color:var(--ox)}
.s4s-alist small{font-weight:400;color:var(--mut);white-space:nowrap}

/* CHÍNH SÁCH */
.s4s-pol{display:grid;grid-template-columns:260px 1fr;gap:36px;align-items:start}
.s4s-toc{position:sticky;top:110px;padding:18px}
.s4s-toc h3{font-size:16px;margin-bottom:10px}
.s4s-toc a{display:block;padding:7px 0;border-bottom:1px solid var(--line);font-size:14.5px;color:var(--ch3)}
.s4s-toc a:hover,.s4s-toc a.on{color:var(--ox)}
.s4s-toc a.on{font-weight:700}
.s4s-meta-row{display:flex;gap:14px;flex-wrap:wrap;font-size:13.5px;color:var(--mut);margin-top:10px}
.s4s-meta-row b{color:var(--ch)}
.s4s-note{background:var(--cop-tint);border:1px solid #E6D8C1;border-radius:11px;padding:14px 16px;font-size:14.5px;color:var(--ch3)}
.s4s-nap{display:grid;grid-template-columns:repeat(2,1fr);gap:12px;margin-top:8px}
.s4s-nap div{padding:14px 16px;border:1px solid var(--line);border-radius:10px;background:#fff;font-size:14.5px}
.s4s-nap b{display:block;font-family:var(--head);font-size:16px;margin-bottom:2px}

/* SẢN PHẨM — khung s4rd đổi màu theo site */
.s4s-sp{display:grid;grid-template-columns:1.05fr .95fr;gap:30px;align-items:start;padding:20px 0 34px}
.s4s-sp-gal{border-radius:14px;overflow:hidden;background:var(--cream);aspect-ratio:4/3.2}
.s4s-sp-gal img{width:100%;height:100%;object-fit:cover}
.s4s-buy{position:sticky;top:110px;padding:22px}
.s4s-buy h1{font-size:30px}
.s4s-buy .sub{color:var(--mut);margin:6px 0 14px;font-size:15px}
.s4s-vg{display:flex;gap:8px;margin-bottom:14px}
.s4s-vg span{flex:1;text-align:center;padding:9px 6px;border-radius:10px;border:1.5px solid var(--line);font-family:var(--head);font-weight:700;font-size:18px;background:var(--cream)}
.s4s-vg span.on{border-color:var(--ox);background:#fff;color:var(--ox)}
.s4s-price{background:var(--cop-tint);border:1px solid #E6D8C1;border-radius:11px;padding:12px 14px;margin-bottom:14px;font-size:14px}
.s4s-price b{display:block;font-family:var(--head);font-size:21px}
.s4s-buy .s4s-btn{width:100%;margin-top:8px}
.s4s-buy ul{list-style:none;padding:0;margin:14px 0 0;display:grid;gap:7px;font-size:14px;color:var(--ch3)}
.s4s-buy li::before{content:"✓";color:var(--ok);font-weight:700;margin-right:8px}


@media (max-width:1024px){
  .s4s-hero-in,.s4s-why,.s4s-cta,.s4s-split,.s4s-two,.s4s-prof,.s4s-pol,.s4s-sp{grid-template-columns:1fr}
  .s4s-cats{grid-template-columns:repeat(2,1fr)}
  .s4s-grid,.s4s-posts,.s4s-gal{grid-template-columns:repeat(2,1fr)}
  .s4s-stats{grid-template-columns:repeat(3,1fr)}
  .s4s-three,.s4s-proof,.s4s-legal{grid-template-columns:1fr 1fr}
  .s4s-aside,.s4s-toc,.s4s-buy{position:static}
  .s4s-hero-side{grid-template-rows:none;grid-template-columns:1fr 1fr}
}
@media (max-width:600px){
  .s4s-hero h1{font-size:31px}
  .s4s-hero-main{min-height:460px}
  .s4s-hero-copy{padding:22px}
  .s4s-tile{min-height:140px}
  .s4s-usp-in{grid-template-columns:1fr 1fr}
  .s4s-cats,.s4s-three,.s4s-proof,.s4s-facts,.s4s-alist,.s4s-nap,.s4s-legal{grid-template-columns:1fr}
  .s4s-grid,.s4s-posts{grid-template-columns:1fr 1fr;gap:10px}
  .s4s-stats{grid-template-columns:1fr 1fr}
  .s4s-head h2,.s4s-prose h2,.s4s-cta h2{font-size:24px}
  .s4s-page-hero h1{font-size:30px}
  .s4s-tl-it{grid-template-columns:64px 1fr;gap:12px}
}
@media (prefers-reduced-motion:reduce){.s4s *{transition:none!important;transform:none!important}}