/* ===== Tab Tổng quan ===== */
.ov-jump{display:flex;flex-wrap:wrap;gap:8px;margin-top:18px;position:relative}
.ov-jump a{font-size:13.5px;font-weight:600;color:#DAF1DE;border:1px solid rgba(218,241,222,.35);border-radius:99px;padding:7px 14px;text-decoration:none}
.ov-jump a:hover{background:rgba(218,241,222,.12)}
.ov-sec{--ink:#16201B;--ink2:#3E4A43;--muted:#6B756F;--line:#DCDDD5;
  background:#F4F3EE;color:var(--ink);border-radius:10px;padding:28px 28px 32px;margin:22px 0;scroll-margin-top:76px}
.ov-sec>header{display:grid;grid-template-columns:auto 1fr;column-gap:16px;align-items:baseline;border-bottom:1px solid var(--line);padding-bottom:14px;margin-bottom:22px}
.ov-sec>header span{grid-row:span 2;font:600 12px/1 var(--sans,Inter,sans-serif);letter-spacing:.14em;text-transform:uppercase;color:#235347;border:1px solid #235347;border-radius:99px;padding:6px 10px}
.ov-sec>header h2{font-family:var(--serif,Newsreader,serif);font-weight:500;font-size:clamp(24px,3vw,32px);margin:0;color:var(--ink);letter-spacing:-.01em}
.ov-sec>header p{margin:4px 0 0;color:var(--muted);font-size:14.5px}
.ov-sec button{font:inherit;color:inherit;background:none;border:0;padding:0;cursor:pointer;text-align:left}

/* Hình 1: cây ngang nhiều lớp */
.mm-bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}
.mm-bar button{font-size:13px!important;font-weight:600;padding:7px 13px!important;border:1px solid var(--line)!important;border-radius:99px;background:#fff!important}
.mm-bar button:hover{border-color:#235347!important}
.mm-bar button.on{background:#0B2B26!important;color:#DAF1DE!important;border-color:#0B2B26!important}
.mm-bar button.k{border-color:#E8C437!important;background:#FFF8DB!important;color:#6B4E00!important}
.mm-bar button.k.on{background:#F5C518!important;color:#2E2300!important}
.mm-bar span{font-size:12.5px;color:var(--muted);margin-left:auto}
.mm-scroll{overflow-x:auto;padding:4px 0 8px}
.tr,.tr ul{list-style:none;margin:0;padding:0}
.tr li{display:flex;align-items:center;position:relative}
.tr li>ul{display:none;flex-direction:column;padding-left:34px;position:relative}
.tr li.open>ul{display:flex}
.tr li.open>ul::before{content:"";position:absolute;left:0;top:50%;width:17px;border-top:2px solid var(--lc,#B9C4BD)}
.tr ul>li{padding:3px 0 3px 17px}
.tr ul>li::before{content:"";position:absolute;left:0;top:50%;width:17px;border-top:2px solid var(--lc,#B9C4BD)}
.tr ul>li::after{content:"";position:absolute;left:0;top:0;bottom:0;border-left:2px solid var(--lc,#B9C4BD)}
.tr ul>li:first-child::after{top:50%}
.tr ul>li:last-child::after{bottom:50%}
.tr ul>li:only-child::after{display:none}
.tr li.t2{--lc:color-mix(in srgb,var(--mc) 45%,#fff)}
.tn{display:flex;align-items:center;gap:8px;flex:none;position:relative;background:#fff;border:1px solid var(--line);border-radius:8px;padding:6px 8px 6px 10px}
.tn .tl{display:block;line-height:1.3;text-align:left}
.tn .tl small{display:block;font-size:11px;color:var(--muted)}
.t1>.tn{background:#051F20;border-color:#051F20;color:#fff;padding:14px 12px 14px 18px;border-radius:12px;box-shadow:0 0 0 4px #DAF1DE}
.t1>.tn .tl{cursor:pointer}
.t1>.tn b{display:block;font-family:var(--serif,Newsreader,serif);font-weight:500;font-size:22px;line-height:1.1;margin:3px 0}
.t1>.tn small{color:#8EB69B;letter-spacing:.06em}
.t2>.tn{width:190px;border-left:5px solid var(--mc);cursor:pointer}
.t2>.tn .tl{flex:1;cursor:pointer}
.t2>.tn b{font-size:15px}
.t2>.tn em{font-style:normal;color:#A07800;font-weight:700}
.mm-n{flex:none;width:24px;height:24px;border-radius:50%;background:var(--mc);color:#fff;display:grid;place-items:center;font-weight:700;font-size:12.5px}
.t3>.tn{width:265px;font-size:13.5px;color:var(--ink2);padding:5px 6px 5px 10px}
.t3>.tn .tl{flex:1;cursor:pointer}
.t3.key>.tn{border-color:#F5C518;box-shadow:0 0 0 1px #F5C518;background:#FFFCEB;color:var(--ink);font-weight:600}
.st{font-style:normal;color:#E0A800;font-size:15px;line-height:1}
.t4>.tn{width:270px;border-style:dashed;padding:4px 8px;background:#FAFAF7}
.t4 .tl{font-size:12.5px;color:var(--ink2)}
.t4 .tl:hover{color:var(--ink)}
.tn .go{flex:none;width:24px;height:24px;border-radius:6px;display:grid!important;place-items:center;text-align:center!important;font-size:13px;color:var(--muted)}
.tn .go:hover{background:#DAF1DE;color:#0B2B26}
.tg{flex:none;width:22px;height:22px;border-radius:50%;border:2px solid var(--mc,#235347)!important;display:grid!important;place-items:center;text-align:center!important;font-weight:800;font-size:15px;line-height:1;color:var(--mc,#235347)!important;background:#fff!important}
.tg::before{content:"+"}
li.open>.tn>.tg::before{content:"−"}
.t1>.tn .tg{border-color:#8EB69B!important;color:#DAF1DE!important;background:transparent!important}
.mm2.only-key .t3:not(.key),.mm2.only-key .t2:not(:has(.t3.key)){display:none}
.mm2.only-key .t2{display:flex}
.mm2.only-key .t2:not(:has(.t3.key)){display:none}

/* Hình 2: ngôi nhà */
.hs{background:#0B2B26;border-radius:10px;padding:30px 22px 22px;color:#DAF1DE}
.hs-row{display:grid;grid-template-columns:110px minmax(0,1fr) 56px;gap:14px;align-items:center;margin-bottom:6px}
.hs-q{font-size:12.5px;line-height:1.3;color:#8EB69B;text-align:right;font-weight:600}
.hs-tag{display:flex;justify-content:center}
.hs-t{white-space:nowrap;min-width:42px;height:30px;padding:0 8px!important;border-radius:99px;background:#F5C518!important;color:#3A2C00!important;font-weight:800;font-size:12.5px;text-align:center!important}
.hs-roof{clip-path:polygon(50% 0,100% 100%,0 100%);background:#051F20;padding:74px 22% 18px;text-align:center;margin:0 -2%}
.hs-roof small{font-size:10.5px;letter-spacing:.18em;color:#8EB69B}
.hs-roof b{display:block;font-family:var(--serif,Newsreader,serif);font-weight:500;font-size:clamp(22px,2.6vw,30px);color:#fff;margin:2px 0 8px}
.hs-roof p{margin:0 0 10px;font-size:14px;color:#DAF1DE}
.hs-roof p button{color:#F5C518;font-weight:700;border-bottom:1px dashed rgba(245,197,24,.6)!important}
.hs-chips{display:flex;flex-wrap:wrap;justify-content:center;gap:6px}
.hs-chips button{font-size:12.5px;font-weight:600;background:#163832;color:#DAF1DE;border:1px solid #235347;border-radius:99px;padding:5px 11px}
.hs-chips button:hover,.hs-roof p button:hover{background:#235347}
.hs-roof em{display:block;font-style:normal;font-size:11.5px;color:#8EB69B;margin-top:10px}
.hs-beam{width:90%;margin:0 auto;display:grid;grid-template-columns:3fr 2fr;gap:8px;background:#F4F3EE;border-radius:4px;padding:8px;color:#16201B}
.hs-lane{border-radius:4px;padding:10px 12px}
.hs-lane.v{background:#DAF1DE}.hs-lane.c{background:#E9E6DA}
.hs-lane small{display:block;font-size:10.5px;letter-spacing:.1em;font-weight:700;color:#235347;margin-bottom:6px}
.hs-lane.c small{color:#7A5A12}
.hs-lane>div{display:grid;grid-template-columns:1fr 1fr;gap:6px}
.hs-lane button{background:#fff!important;border-radius:4px;padding:8px 10px!important}
.hs-lane button:hover{box-shadow:0 0 0 2px #235347}
.hs-lane b{display:block;font-size:14px}
.hs-lane span{display:block;font-size:12px;color:#55605A;line-height:1.3;margin-top:2px}
.hs-lane p{margin:7px 0 0;font-size:12.5px;color:#3E4A43;font-style:italic}
.r-pil{margin:10px 0 4px}
.hs-pillars{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:0 3%}
.hs-p{display:flex!important;flex-direction:column;align-items:center;justify-content:center;text-align:center!important;min-height:168px;background:#8EB69B!important;color:#051F20!important;
  clip-path:polygon(50% 0,100% 22%,100% 78%,50% 100%,0 78%,0 22%);padding:26px 14px!important;transition:background .15s}
.hs-p:hover{background:#DAF1DE!important}
.hs-p i{font-style:normal;font-size:10.5px;letter-spacing:.14em;font-weight:700;color:#163832;text-transform:uppercase}
.hs-p b{font-size:16px;margin:3px 0;line-height:1.2}
.hs-p span{font-size:12px;line-height:1.3;color:#163832}
.hs-note{margin:8px 0 0;text-align:center;font-size:12.5px;color:#8EB69B}
.hs-slab{display:block;width:100%;text-align:center!important;border-radius:3px;padding:11px 16px!important}
.hs-slab b{display:block;font-size:16px}
.hs-slab span{display:block;font-size:12.5px;margin-top:2px;opacity:.85}
.hs-slab.s1{background:#F4F3EE!important;color:#051F20!important;width:90%;margin:0 auto}
.hs-slab.s2{background:#DAF1DE;color:#051F20;width:93%;margin:0 auto}
.hs-slab.split{display:grid;grid-template-columns:repeat(4,1fr);gap:4px;padding:4px!important}
.hs-slab.split button{background:rgba(255,255,255,.55)!important;border-radius:2px;padding:8px 6px!important;text-align:center}
.hs-slab.split button:hover{background:#fff!important}
.hs-slab.split b{font-size:15px}
.hs-slab.s3{background:#8EB69B!important;color:#051F20!important;width:96%;margin:0 auto}
.hs-slab.s4{background:#5E8F78!important;color:#fff!important;width:98%;margin:0 auto}
.hs-slab.s5{background:#235347!important;color:#DAF1DE!important}
button.hs-slab:hover{filter:brightness(1.08)}
.hs-foot{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:20px;padding-top:14px;border-top:1px solid #235347;font-size:12.5px;color:#BFE3CB;line-height:1.45}
.hs-foot b{color:#fff}

/* Hình 3: mục lục */
.kx-bar{display:flex;gap:12px;align-items:center;margin-bottom:16px}
.kx-bar input{flex:1;font:inherit;font-size:15px;padding:11px 14px;border:1px solid var(--line);border-radius:8px;background:#fff;color:var(--ink)}
.kx-bar span{font-size:13px;color:var(--muted);white-space:nowrap}
.kx-grid{columns:3 300px;column-gap:18px}
.kx-g{break-inside:avoid;margin-bottom:18px;background:#fff;border:1px solid var(--line);border-radius:10px;padding:12px 12px 6px;border-top:3px solid var(--kc)}
.kx-g[hidden],.kx-i[hidden]{display:none!important}
.kx-g h3{font:700 12px/1.2 var(--sans,Inter,sans-serif);letter-spacing:.1em;text-transform:uppercase;color:var(--kc);margin:2px 0 8px}
.kx-i{display:grid!important;grid-template-columns:1fr auto;gap:0 10px;width:100%;padding:7px 6px!important;border-top:1px solid #EEEEE8!important;border-radius:4px}
.kx-i:hover{background:color-mix(in srgb,var(--kc) 9%,#fff)!important}
.kx-i b{font-size:14.5px;color:var(--ink)}
.kx-i span{grid-column:1;font-size:12.5px;color:var(--muted);line-height:1.35}
.kx-i i{grid-row:1;grid-column:2;font-style:normal;font-size:11px;color:var(--kc);font-weight:600;white-space:nowrap}

@media(max-width:899px){
}
@media(max-width:720px){
  .mm-bar span{margin-left:0}
  .mm-scroll{overflow:visible}
  .tr li{display:block}
  .tr li>ul{padding:4px 0 0 14px}
  .tr li.open>ul::before{display:none}
  .tr ul>li{padding:3px 0 3px 16px}
  .tr ul>li::before{top:20px;width:14px}
  .tr ul>li::after{top:0;bottom:0}
  .tr ul>li:first-child::after{top:0}
  .tr ul>li:last-child::after{bottom:auto;height:20px}
  .tr ul>li:only-child::after{display:block}
  .t1>.tn,.t2>.tn,.t3>.tn,.t4>.tn{width:auto}
  .t1>.tn b{font-size:20px}
  .ov-sec{padding:18px 14px 22px}
  .ov-sec>header{grid-template-columns:1fr}.ov-sec>header span{grid-row:auto;justify-self:start;margin-bottom:8px}
  .hs{padding:20px 10px 16px}
  .hs-row{grid-template-columns:minmax(0,1fr) 44px;gap:8px}
  .hs-q{grid-column:1/-1;text-align:left;margin-top:8px}.hs-q br{display:none}
  .r-roof .hs-tag{display:none}.r-roof{grid-template-columns:1fr}
  .hs-roof{padding:56px 8% 14px;clip-path:polygon(50% 0,100% 38%,100% 100%,0 100%,0 38%)}
  .hs-beam,.hs-lane>div{grid-template-columns:1fr}
  .hs-pillars{grid-template-columns:1fr 1fr;padding:0}
  .hs-slab.split{grid-template-columns:1fr 1fr}
  .hs-slab.s1,.hs-slab.s2,.hs-slab.s3,.hs-slab.s4,.hs-beam{width:100%}
  .hs-foot{grid-template-columns:1fr}
  .kx-bar{flex-direction:column;align-items:stretch}
}

/* ===== Cửa sổ học nhanh ===== */
.ov-wish{font:inherit;font-size:13.5px;font-weight:600;color:#3A2C00;background:#F5C518;border:0;border-radius:99px;padding:7px 14px;cursor:pointer}
.ov-wish b{background:rgba(0,0,0,.12);border-radius:99px;padding:0 7px;margin-left:4px}
body.ln-open{overflow:hidden}
.ln-pop{position:fixed;inset:0;z-index:85;background:rgba(3,8,6,.72);display:flex;align-items:center;justify-content:center;padding:24px;opacity:0;transition:opacity .15s}
.ln-pop[hidden]{display:none}
.ln-pop.open{opacity:1}
.ln-box{--ink:#16201B;--ink2:#3E4A43;--muted:#6B756F;--line:#DCDDD5;position:relative;width:min(1180px,100%);max-height:calc(100vh - 48px);display:flex;flex-direction:column;background:#F4F3EE;color:var(--ink);border-radius:14px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.5);border-top:6px solid var(--mc,#235347);font-family:var(--sans,Inter,sans-serif)}
.ln-h{position:relative;padding:18px 64px 14px 24px;border-bottom:1px solid var(--line);background:#fff}
.ln-crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted);font-weight:600}
.ln-crumb .st{font-style:normal;color:#A07800;background:#FFF3C4;border-radius:99px;padding:2px 8px;font-size:12px}
.ln-h h2{font-family:var(--serif,Newsreader,serif);font-weight:500;font-size:clamp(22px,2.6vw,30px);line-height:1.15;margin:6px 0 10px;color:var(--ink)}
.ln-h p{margin:0;color:var(--muted);font-size:14px}
.ln-act{display:flex;flex-wrap:wrap;gap:8px}
.ln-btn{font:inherit;font-size:13px;font-weight:600;color:var(--ink);background:#fff;border:1px solid var(--line);border-radius:99px;padding:7px 13px;cursor:pointer;text-decoration:none;display:inline-flex;align-items:center}
.ln-btn:hover{border-color:#235347}
.ln-btn.on{background:#FFE9EC;border-color:#E58A98;color:#A3253A}
.ln-btn.ghost{color:var(--muted)}
.ln-btn:disabled{opacity:.4;cursor:default}
.ln-x{position:absolute;top:14px;right:16px;width:40px;height:40px;border-radius:50%;border:0;background:#EEF0EA;font-size:26px;line-height:1;color:#3E4A43;cursor:pointer}
.ln-x:hover{background:#DDE2DA}
.ln-body{display:grid;grid-template-columns:minmax(0,1fr) 380px;flex:1;min-height:0}
.ln-main{overflow:auto;padding:18px 24px 26px}
.ln-side{display:flex;flex-direction:column;border-left:1px solid var(--line);background:#EDECE6;min-height:0}
.ln-main h3,.ln-side h3{font-size:12.5px;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);margin:18px 0 8px;font-weight:700;display:flex;justify-content:space-between;gap:8px}
.ln-main h3:first-child{margin-top:0}
.ln-main h3 small,.ln-side h3 small{text-transform:none;letter-spacing:0;font-weight:500}
.ln-kw{background:#0B2B26;color:#DAF1DE;border-radius:10px;padding:12px 16px;margin-bottom:16px}
.ln-kw small{font-size:10.5px;letter-spacing:.14em;color:#8EB69B}
.ln-kw b{display:block;font-size:20px;color:#fff;margin:2px 0}
.ln-kw span{font-size:14px}
.ln-pts{margin:0;padding:0;list-style:none}
.ln-pts li{position:relative;padding:8px 0 8px 22px;border-bottom:1px solid #E4E3DC;font-size:15.5px;line-height:1.55;color:var(--ink)}
.ln-pts li::before{content:"";position:absolute;left:4px;top:17px;width:8px;height:8px;border-radius:50%;background:var(--mc,#235347)}
.ln-slides{display:grid;grid-template-columns:repeat(auto-fill,minmax(180px,1fr));gap:10px}
.ln-slides button{padding:0;border:1px solid var(--line);border-radius:6px;overflow:hidden;background:#fff;cursor:zoom-in;aspect-ratio:16/9}
.ln-slides img{width:100%;height:100%;object-fit:cover;display:block}
.ln-slides button:hover{box-shadow:0 0 0 2px var(--mc,#235347)}
.ln-links{display:flex;flex-wrap:wrap;gap:8px}
.ln-chip{font-size:13px;font-weight:600;color:#1F5FA8;background:#fff;border:1px solid #D5E3FA;border-radius:8px;padding:7px 11px;text-decoration:none}
.ln-chip:hover{background:#F1F5FF}
.ln-note{padding:14px 16px 0}
.ln-note h3{margin-top:0}
.ln-note textarea{width:100%;box-sizing:border-box;min-height:110px;font:inherit;font-size:14px;border:1px solid var(--line);border-radius:8px;padding:10px;resize:vertical;background:#FFFDF2;color:var(--ink)}
.ln-chat{display:flex;flex-direction:column;flex:1;min-height:0;padding:0 16px 14px}
.ln-log{flex:1;min-height:140px;overflow:auto;background:#fff;border:1px solid var(--line);border-radius:8px;padding:10px;display:flex;flex-direction:column;gap:8px}
.ln-empty{margin:0;font-size:13px;color:var(--muted);line-height:1.6}
.ln-empty button{font:inherit;font-size:12.5px;color:#235347;background:#E9F2EA;border:0;border-radius:99px;padding:3px 10px;margin:3px 2px 0 0;cursor:pointer}
.ln-m{font-size:14px;line-height:1.5;padding:8px 11px;border-radius:10px;max-width:92%;white-space:pre-wrap}
.ln-m.u{align-self:flex-end;background:#0B2B26;color:#EEF6F0}
.ln-m.a{align-self:flex-start;background:#F1F0EA;color:var(--ink)}
.ln-form{display:flex;gap:6px;margin-top:8px}
.ln-form input{flex:1;min-width:0;font:inherit;font-size:14px;border:1px solid var(--line);border-radius:8px;padding:10px;background:#fff;color:var(--ink)}
.ln-form button{font:inherit;font-weight:600;font-size:14px;color:#fff;background:#235347;border:0;border-radius:8px;padding:0 16px;cursor:pointer}
.ln-off{font-size:12.5px;color:var(--muted);margin:8px 0 0}
.ln-box.wl{width:min(720px,100%)}
.wl-list{overflow:auto;padding:14px 20px 20px;display:flex;flex-direction:column;gap:8px}
.wl-i{display:flex;align-items:center;gap:6px;background:#fff;border:1px solid var(--line);border-left:4px solid var(--mc);border-radius:8px;padding:4px 6px 4px 0}
.wl-i>button:first-child{flex:1;text-align:left;font:inherit;background:none;border:0;padding:8px 12px;cursor:pointer;color:var(--ink)}
.wl-i small{display:block;font-size:11.5px;color:var(--muted)}
.wl-i b{display:block;font-size:15px}
.wl-i span{display:block;font-size:12.5px;color:var(--muted);margin-top:2px}
@media(max-width:900px){
  .ln-pop{padding:0;align-items:stretch}
  .ln-box{max-height:none;height:100%;border-radius:0}
  .ln-body{display:block;overflow:auto}
  .ln-main{overflow:visible;padding:16px}
  .ln-side{border-left:0;border-top:1px solid var(--line)}
  .ln-log{min-height:200px;max-height:50vh}
  .ln-h{padding:14px 60px 12px 16px}
}
.ln-main h3,.ln-side h3{font-family:var(--sans,Inter,sans-serif)!important}
.ln-form[hidden]{display:none}
@media(max-width:900px){.ln-slides{grid-template-columns:repeat(2,1fr)}}
.ln-p{margin:0 0 4px;font-size:15px;line-height:1.6;color:var(--ink)}
.ln-p.big{font-size:16.5px}
.ln-kw.key{background:#FFF6D6;color:#4A3800;border:1px solid #F5C518}
.ln-kw.key small{color:#9A7400;font-weight:700}
.ln-kw.key span{font-size:14.5px}
.ln-rel{display:flex;flex-wrap:wrap;gap:6px;align-items:center;margin-bottom:8px}
.ln-rel span{font-size:12.5px;color:var(--muted);min-width:96px}
.ln-rel .ln-chip,.ln-links button.ln-chip{font:inherit;font-size:13px;font-weight:600;cursor:pointer;color:#1F5FA8}
.ln-ex{margin-top:16px;background:#E9F2EA;border-left:4px solid #235347;border-radius:6px;padding:12px 14px;font-size:14.5px;line-height:1.55}
.ln-ex b{display:block;font-size:12px;letter-spacing:.08em;text-transform:uppercase;color:#235347;margin-bottom:4px}
.ln-ol{margin:0;padding-left:22px}
.ln-ol li{padding:5px 0;font-size:15px;line-height:1.5}
.gloss button{display:block;width:100%;text-align:left;font:inherit;color:var(--ink);background:var(--paper,#F4F3EE);border:0;border-radius:6px;padding:14px 16px;cursor:pointer;transition:box-shadow .15s}
.gloss button:hover{box-shadow:0 0 0 2px #F5C518}
.gloss button b{display:block;font-family:var(--serif);font-weight:500;font-size:17px;color:#16201B}
.gloss button span{font-size:14px;color:#3E4A43}
.ln-kw small{display:block}
/* mẫu 4 thương hiệu */
.mau{margin:20px 0 6px;border:1px solid #E6D9A8;border-radius:10px;background:#FFFCF0;overflow:hidden}
.mau-h{padding:12px 14px 0}
.mau-h h3{margin:0 0 10px!important;color:#7A5A00!important}
.mau-h h3 a{color:#1F5FA8;font-weight:600}
.mau-tabs{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.mau-tabs button{font:inherit;text-align:left;background:#fff;border:1px solid #EADFB8;border-bottom:0;border-radius:8px 8px 0 0;padding:8px 10px;cursor:pointer;color:#16201B}
.mau-tabs button b{display:block;font-size:13.5px}
.mau-tabs button span{display:block;font-size:11.5px;color:#6B756F;line-height:1.3}
.mau-tabs button.on{background:#0B2B26;border-color:#0B2B26;color:#fff}
.mau-tabs button.on span{color:#BFE3CB}
.mau-p{background:#fff;border-top:3px solid #0B2B26;padding:14px 16px 16px;font-size:14.5px;line-height:1.55;color:#16201B}
.mau-p[hidden]{display:none}
.mau-p h4{font-size:13px;letter-spacing:.06em;text-transform:uppercase;color:#235347;margin:14px 0 4px}
.mau-p p{margin:0 0 8px}
.mau-p ul{margin:0 0 8px;padding-left:20px}
.mau-p li{margin:2px 0}
.mau-p blockquote{margin:6px 0 10px;padding:10px 14px;background:#E9F2EA;border-left:4px solid #235347;border-radius:4px;font-family:var(--serif,Newsreader,serif);font-size:19px;line-height:1.35;color:#0B2B26}
.mau-hl{background:#FFF3C4;border-radius:6px;padding:8px 10px;font-weight:600}
.mau-ctx{color:#55605A;font-size:13.5px;border-bottom:1px dashed #E1E3DD;padding-bottom:10px}
@media(max-width:640px){.mau-tabs{grid-template-columns:1fr 1fr}.mau-tabs button{border-bottom:1px solid #EADFB8;border-radius:8px}}
/* Thư viện dạng cây */
.lib2 .mm-bar input{margin-left:auto;font:inherit;font-size:14px;padding:8px 12px;border:1px solid var(--line);border-radius:99px;background:#fff;color:var(--ink);min-width:240px}
.lib2 .t2>.tn{width:250px}
.lib2 .t2>.tn .mm-n{background:none;font-size:18px;width:auto}
.lib2 .t2>.tn small{white-space:normal}
.lib2 .t3>.tn{width:400px;align-items:flex-start;padding:9px 8px 9px 12px;border-left:4px solid var(--mc)}
.lib2 .t3>.tn b{display:block;font-size:14.5px;color:var(--ink);line-height:1.3}
.lib2 .t3>.tn small{font-size:12.5px;margin-top:3px;line-height:1.4}
.lb-kw{display:flex;flex-wrap:wrap;gap:4px;margin-top:6px}
.lb-kw i{font-style:normal;font-size:11.5px;font-weight:600;color:#235347;background:#E9F2EA;border-radius:99px;padding:2px 8px}
.lb-kw i.more{background:#F1F0EA;color:var(--muted)}
.lb-open{flex:none;align-self:flex-start;font:inherit;font-size:12.5px;font-weight:700;color:#fff!important;background:#235347!important;border:0;border-radius:6px;padding:5px 10px!important;text-decoration:none;cursor:pointer;white-space:nowrap}
.lb-open:hover{background:#0B2B26!important}
.lib2 .t3>.tn .tg{align-self:flex-start;margin-top:2px}
.lib2 .t4>.tn.lb-kws{width:320px;display:block;border-style:solid;background:#FFFCF0;border-color:#EADFB8}
.lb-kws small{display:block;font-size:11px;color:#7A5A00;font-weight:700;letter-spacing:.04em;margin-bottom:6px}
.lb-kws div{display:flex;flex-wrap:wrap;gap:6px}
.lb-kws button{font:inherit;font-size:12.5px;font-weight:600;color:#1F5FA8;background:#fff!important;border:1px solid #D5E3FA!important;border-radius:99px;padding:4px 10px!important;cursor:pointer}
.lb-kws button:hover{background:#F1F5FF!important}
.lib2 li[hidden]{display:none!important}
@media(max-width:720px){.lib2 .mm-bar input{margin-left:0;min-width:0;width:100%}.lib2 .t2>.tn,.lib2 .t3>.tn,.lib2 .t4>.tn.lb-kws{width:auto}}

/* ---------- Hình 3: viral vs chuyển đổi ---------- */
.vc{--vv:#D9792B;--vvl:#FCEBD9;--cc:#1F6F5C;--ccl:#DCEFE8}
.vc-pair{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.vc-c{border:1px solid var(--line);border-radius:16px;padding:18px;background:#fff;display:flex;flex-direction:column;gap:14px}
.vc-c.v{border-top:6px solid var(--vv)}.vc-c.c{border-top:6px solid var(--cc)}
.vc-c header small{font:700 11px/1.2 var(--sans,Inter,sans-serif);letter-spacing:.1em;color:var(--muted)}
.vc-c header h3{margin:4px 0 2px;font:700 24px/1.15 var(--sans,Inter,sans-serif)!important}
.vc-c.v header h3{color:var(--vv)}.vc-c.c header h3{color:var(--cc)}
.vc-c header p{margin:0;color:var(--ink2);font-size:14px}
.vc-venn{position:relative;height:190px}
.vc-o{position:absolute;top:0;width:62%;height:190px;border-radius:50%;display:flex;flex-direction:column;justify-content:center;gap:2px;font-size:13px;line-height:1.25;padding:0 7%}
.vc-o b{font-size:14px}.vc-o span{opacity:.85;font-size:12px}
.vc-o.a{left:0;padding-right:24%;text-align:left}.vc-o.b{right:0;padding-left:24%;text-align:right}
.v .vc-o.a{background:rgba(245,197,24,.55);color:#4A3500}.v .vc-o.b{background:rgba(217,121,43,.55);color:#4A2100}
.c .vc-o.a{background:rgba(142,182,155,.6);color:#0E3326}.c .vc-o.b{background:rgba(31,111,92,.55);color:#06261D}
.vc-o.a{mix-blend-mode:multiply}.vc-o.b{mix-blend-mode:multiply}
.vc-mid{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);background:#fff;border-radius:99px;padding:6px 10px;font:800 12px/1 var(--sans,Inter,sans-serif);letter-spacing:.08em;box-shadow:0 2px 8px rgba(0,0,0,.12);white-space:nowrap}
.v .vc-mid{color:var(--vv)}.c .vc-mid{color:var(--cc)}
.vc-c .vc-f{display:block;border-radius:10px;padding:10px 12px;font-size:14px;line-height:1.45}
.v .vc-f{background:var(--vvl)}.c .vc-f{background:var(--ccl)}
.vc-f small{display:block;font:700 10.5px/1 var(--sans,Inter,sans-serif);letter-spacing:.12em;color:var(--muted);margin-bottom:5px}
.vc-steps{list-style:none;margin:0;padding:0;position:relative}
.vc-steps:before{content:"";position:absolute;left:14px;top:14px;bottom:14px;width:2px;background:var(--line)}
.vc-steps li{position:relative}
.vc-steps button{display:flex;gap:12px;width:100%;padding:7px 6px 7px 0;border-radius:10px}
.vc-steps button:hover{background:#F5F5F0}
.vc-steps i{flex:none;width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font:800 13px/1 var(--sans,Inter,sans-serif);font-style:normal;color:#fff;position:relative}
.v .vc-steps i{background:var(--vv)}.c .vc-steps i{background:var(--cc)}
.vc-steps em{display:block;font:700 10.5px/1.2 var(--sans,Inter,sans-serif);letter-spacing:.08em;text-transform:uppercase;font-style:normal;color:var(--muted)}
.vc-steps b{display:block;font-size:15px;color:var(--ink);margin:1px 0}
.vc-steps span{display:block;font-size:13px;color:var(--ink2);line-height:1.4}
.vc-ex{border-left:3px solid var(--line);padding:2px 0 2px 12px;margin-top:auto}
.v .vc-ex{border-color:var(--vv)}.c .vc-ex{border-color:var(--cc)}
.vc-ex small{font:700 10.5px/1 var(--sans,Inter,sans-serif);letter-spacing:.12em;color:var(--muted)}
.vc-ex p{margin:5px 0 0;font-size:13.5px;line-height:1.5;color:var(--ink2)}
.vc-cmp{display:grid;grid-template-columns:150px 1fr 1fr;margin-top:18px;border:1px solid var(--line);border-radius:12px;overflow:hidden;font-size:14px;background:#fff}
.vc-cmp>div{padding:9px 12px;border-top:1px solid var(--line)}
.vc-cmp .h{border-top:0;font:800 12px/1.2 var(--sans,Inter,sans-serif);letter-spacing:.1em;text-transform:uppercase}
.vc-cmp .h.v{color:var(--vv)}.vc-cmp .h.c{color:var(--cc)}
.vc-cmp .k{color:var(--muted);font-weight:600;font-size:13px}
.vc-cmp div.v:not(.h){background:#FFFAF4}.vc-cmp div.c:not(.h){background:#F5FBF8}
.vc-qwrap{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.5fr);gap:22px;align-items:center;margin-top:22px}
.vc-qh b{display:block;font-size:17px;color:var(--ink);margin-bottom:6px}.vc-qh span{color:var(--ink2);font-size:14px;line-height:1.5}
.vc-q{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:6px;padding:26px 30px}
.vc-q:before,.vc-q:after{content:"";position:absolute;background:var(--ink)}
.vc-q:before{left:50%;top:14px;bottom:14px;width:2px;transform:translateX(-1px)}
.vc-q:after{top:50%;left:18px;right:18px;height:2px;transform:translateY(-1px)}
.vc-q .ax{position:absolute;font:800 10.5px/1 var(--sans,Inter,sans-serif);letter-spacing:.12em;color:var(--muted);background:#F4F3EE;padding:2px 4px;z-index:1}
.vc-q .ax.t{top:0;left:50%;transform:translateX(-50%)}.vc-q .ax.b{bottom:0;left:50%;transform:translateX(-50%)}
.vc-q .ax.l{left:-6px;top:50%;transform:translateY(-50%) rotate(-90deg)}.vc-q .ax.r{right:-6px;top:50%;transform:translateY(-50%) rotate(90deg)}
.vc-q .vc-qc{position:relative;z-index:1;border-radius:12px;padding:14px;min-height:96px;display:flex;flex-direction:column;gap:4px}
.vc-qc b{font-size:15px}.vc-qc span{font-size:12.5px;line-height:1.4;color:var(--ink2)}
.vc-qc.tl,.vc-qc.tr{background:var(--vvl)}.vc-qc.tl b,.vc-qc.tr b{color:var(--vv)}
.vc-qc.bl,.vc-qc.br{background:var(--ccl)}.vc-qc.bl b,.vc-qc.br b{color:var(--cc)}
.vc-qc:hover{outline:2px solid var(--ink)}
.vc-band{position:absolute;right:-4px;font:800 10px/1 var(--sans,Inter,sans-serif);letter-spacing:.1em;font-style:normal;color:#fff;padding:4px 6px;border-radius:4px;z-index:2}
.vc-band.v{top:30px;background:var(--vv)}.vc-band.c{bottom:30px;background:var(--cc)}
.vc-rule{margin:18px 0 0;padding:12px 14px;border-radius:10px;background:#051F20;color:#DAF1DE;font-size:14px;line-height:1.55}
.vc-rule b{color:#F5C518}
@media (max-width:820px){
  .vc-pair,.vc-qwrap{grid-template-columns:1fr}
  .vc-cmp{grid-template-columns:92px 1fr 1fr;font-size:13px}.vc-cmp>div{padding:8px}
  .vc-venn,.vc-o{height:160px}
  .vc-q{padding:24px 22px}.vc-q .vc-qc{padding:10px;min-height:0}
}

/* v18: ngôi nhà mạch lạc hơn */
.hs-row{grid-template-columns:110px minmax(0,1fr) 64px}
.hs-t{font-size:12px}
.r-link{margin:0 0 6px}.r-link .hs-link{text-align:center}
.hs-link span{display:inline-block;font-size:12.5px;color:#F5C518;background:rgba(245,197,24,.1);border:1px dashed rgba(245,197,24,.5);border-radius:99px;padding:4px 12px;line-height:1.35}
.hs-ex{display:block;margin-top:5px;font-size:12.5px;font-style:italic;color:#8A6A00}
.hs-slab.s4 .hs-ex,.hs-slab.s5 .hs-ex{color:#F5C518}.hs-slab.s3 .hs-ex{color:#3A2C00}
.hs-slab.split .hs-ex{grid-column:1/-1;text-align:center;padding:2px 0 4px}
.hs-mx{display:grid;grid-template-columns:140px repeat(4,minmax(0,1fr));gap:6px;background:#F4F3EE;border-radius:6px;padding:8px;color:#16201B}
.mx-l{display:flex;flex-direction:column;justify-content:center;padding:6px 8px;border-radius:4px}
.mx-l b{font-size:13.5px;line-height:1.2}.mx-l span{font-size:11.5px;line-height:1.35;color:#55605A;margin-top:3px}
.mx-l.v{background:#DAF1DE}.mx-l.v b{color:#235347}
.mx-l.c{background:#E9E6DA}.mx-l.c b{color:#7A5A12}
.mx-l.p{background:#8EB69B}.mx-l.p b{color:#051F20}.mx-l.p span{color:#163832}
.hs-mx .mx-c{border-radius:4px;padding:8px 10px!important;font-size:13px;line-height:1.4;background:#fff!important;border-left:4px solid #8EB69B!important}
.hs-mx .mx-c.c{border-left-color:#C9A227!important}
.mx-c i{display:none;font-style:normal;font-size:10px;letter-spacing:.08em;font-weight:700;text-transform:uppercase;color:#6B756F;margin-bottom:2px}
.hs-mx .mx-c:hover,.hs-mx .mx-p:hover{box-shadow:0 0 0 2px #235347}
.hs-mx .mx-p{display:flex;flex-direction:column;align-items:center;text-align:center!important;background:#8EB69B!important;color:#051F20!important;border-radius:4px 4px 0 0;padding:10px 6px 12px!important;border-top:8px solid #5E8F78!important;position:relative}
.mx-p i{font-style:normal;font-size:10px;letter-spacing:.14em;font-weight:700;color:#163832;text-transform:uppercase}
.mx-p b{font-size:15px;margin:2px 0;line-height:1.2}.mx-p span{font-size:11.5px;color:#163832;line-height:1.3}
@media (max-width:820px){
  .hs-row{grid-template-columns:minmax(0,1fr) 48px}
  .r-link{grid-template-columns:1fr}.r-link>div:empty{display:none}
  .hs-mx{grid-template-columns:1fr 1fr}
  .mx-l{grid-column:1/-1}
  .mx-c i{display:block}
  .r-pil{grid-template-columns:1fr}.r-pil .hs-tag{display:none}
}

.vc-fmt{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1fr) minmax(0,1fr);gap:14px;align-items:stretch;margin-top:22px}
.vc-fmt .vc-qh{align-self:center}
.vc .vc-fm{display:flex;flex-direction:column;gap:5px;border-radius:12px;padding:14px 16px}
.vc-fm b{font-size:17px}.vc-fm span{font-size:13.5px;line-height:1.45;color:var(--ink2)}
.vc-fm.v{background:var(--vvl)}.vc-fm.v b{color:var(--vv)}.vc-fm.c{background:var(--ccl)}.vc-fm.c b{color:var(--cc)}
.vc-fm:hover{outline:2px solid var(--ink)}
.vc-steps span:empty{display:none}
@media (max-width:820px){.vc-fmt{grid-template-columns:1fr}}

.vc-star{text-decoration:none;color:#E0A800;font-size:1.05em}
.vc-steps li.key>button{background:#FFF8DC}
.vc-steps li{display:block}
.vc .vc-vl{display:inline-block;font-size:12.5px;font-weight:600;color:#235347;background:#EEF4EF;border:1px solid #CFE0D4;border-radius:99px;padding:3px 10px;margin:4px 6px 0 0;text-decoration:none;line-height:1.35}
.vc .vc-vl:hover{background:#DAF1DE}
.vc .vc-vl.sm{font-size:11.5px;padding:2px 8px;margin:0 0 6px 42px}
.vc-leg .vc-vl.sm{margin:0 2px}
.vc-vids small{display:block;font:700 10.5px/1 var(--sans,Inter,sans-serif);letter-spacing:.12em;color:var(--muted);margin-bottom:4px}
.vc-leg{margin:0 0 14px;font-size:13px;color:var(--ink2)}
.vc-qh .vc-vl{margin-top:10px}
.vc-rule .vc-vl{background:#163832;color:#DAF1DE;border-color:#235347;margin:0 0 0 6px}

/* v21: xà ngang + trụ lục giác, chỉ tuyến viral */
.hs-roof p .k-way{color:#F5C518}.hs-roof p .k-top{color:#A8E6B8;border-bottom-color:rgba(168,230,184,.6)!important}
.hs-beam2{width:94%;margin:0 auto;background:#F5C518;color:#3A2C00;padding:10px 12px 12px;clip-path:polygon(2% 0,98% 0,100% 100%,0 100%)}
.hs-beam2 small{display:block;text-align:center;font-size:10.5px;letter-spacing:.14em;font-weight:800;margin-bottom:8px}
.hs-beam2>div{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.hs-beam2 button{background:rgba(255,255,255,.6)!important;border-radius:3px;padding:8px 10px!important;text-align:center!important}
.hs-beam2 button:hover{background:#fff!important}
.hs-beam2 b{display:block;font-size:14.5px}.hs-beam2 span{display:block;font-size:12px;line-height:1.3;margin-top:2px;color:#5A4500}
.hs-ptag{text-align:center;font-size:10.5px;letter-spacing:.14em;font-weight:800;color:#A8E6B8;margin:0 0 6px}
@media (max-width:820px){.hs-beam2{width:100%;clip-path:none;border-radius:4px}.hs-beam2>div{grid-template-columns:1fr 1fr}}

/* v22 */
.hs-beam2 i{display:block;font-style:normal;font-size:10px;letter-spacing:.12em;font-weight:800;text-transform:uppercase;color:#8A6A00;margin-bottom:2px}
.hs-slab.split3{display:grid;grid-template-columns:repeat(3,1fr);gap:4px;padding:4px!important;width:96%;margin:0 auto}
.hs-slab.split3 button{background:rgba(255,255,255,.5)!important;border-radius:2px;padding:8px 6px!important;text-align:center!important}
.hs-slab.split3 button:hover{background:#fff!important}
.hs-slab.split3 em{grid-column:1/-1;font-size:12.5px;padding:3px 0 4px;color:#163832}
.hs-slab.s2{width:90%}
.r-roof .hs-roof b{margin-bottom:10px}
@media (max-width:820px){.hs-slab.split3{grid-template-columns:1fr;width:100%}}

/* v24 */
.hs-roof .hs-fx{font-size:14px;line-height:1.6;max-width:560px;margin:0 auto 6px}
.hs-roof .hs-fx button:first-child{color:#fff;font-weight:800;border-bottom:0!important}
.hs-door{width:84%;margin:0 auto;background:#F4F3EE;border:3px solid #F5C518;border-radius:120px 120px 6px 6px/60px 60px 6px 6px;padding:18px 16px 14px;color:#16201B;text-align:center}
.hd-h small{display:block;font-size:10.5px;letter-spacing:.16em;font-weight:800;color:#8A6A00}
.hd-h b{display:block;font-family:var(--serif,Newsreader,serif);font-weight:600;font-size:clamp(18px,2.1vw,23px);margin:3px 0 12px;color:#051F20}
.hd-g{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.hd-g button{background:#fff!important;border-radius:6px;padding:9px 10px!important;text-align:left!important;border:1px solid #E6E2CF!important;display:flex;flex-direction:column;justify-content:flex-start;align-items:flex-start}
.hd-g button:hover,.hd-ex:hover{box-shadow:0 0 0 2px #F5C518}
.hd-g i{font-style:normal;display:inline-grid;place-items:center;width:20px;height:20px;border-radius:50%;background:#F5C518;color:#3A2C00;font-size:11.5px;font-weight:800;margin-bottom:4px}
.hd-g b{display:block;font-size:13.5px;line-height:1.25}.hd-g span{display:block;font-size:12px;color:#55605A;line-height:1.35;margin-top:3px}
.hs-door .hd-ex{display:block;width:100%;margin-top:8px;font-size:12.5px;font-style:italic;color:#5A4500;background:#FFF8DC!important;border-radius:6px;padding:7px 10px!important;text-align:center!important}
.hs-pex{font-style:normal;font-size:11px;font-weight:700;color:#051F20;margin-top:4px;text-decoration:underline}
.hs-sh{grid-column:1/-1;font-size:16px;padding:4px 0 2px}
@media (max-width:820px){.hs-door{width:100%;border-radius:60px 60px 6px 6px/36px 36px 6px 6px}.hd-g{grid-template-columns:1fr 1fr}}

/* v34: khung đầu Tổng quan thu gọn thành 1 dải */
.hero.ov-mini{min-height:0;padding:12px 18px;margin:14px 0 14px;flex-direction:row;align-items:center;flex-wrap:wrap;gap:8px 18px}
.hero.ov-mini h1{font-size:24px;line-height:1.1;margin:0}
.hero.ov-mini .ov-jump{margin-top:0;gap:6px}
.hero.ov-mini .ov-jump a,.hero.ov-mini .ov-wish{padding:5px 12px;font-size:13px}
@media (max-width:700px){.hero.ov-mini{padding:10px 14px}.hero.ov-mini h1{font-size:21px}.hero.ov-mini .ov-jump{flex-wrap:nowrap;overflow-x:auto;width:100%;scrollbar-width:none;padding-bottom:2px}.hero.ov-mini .ov-jump::-webkit-scrollbar{display:none}.hero.ov-mini .ov-jump a,.hero.ov-mini .ov-wish{white-space:nowrap;flex:none}}
.hero.ov-mini .mini-l{margin:0;font-size:13.5px;color:rgba(244,243,238,.82);border:0;padding:0;line-height:1.45}
@media (max-width:700px){.hero.ov-mini .mini-l{font-size:12.5px}}
.hero.ov-mini .pl-tools{margin-top:0;gap:6px}.hero.ov-mini .pl-tools a{padding:5px 12px;font-size:13px}
@media (max-width:700px){.hero.ov-mini .pl-tools{flex-wrap:nowrap;overflow-x:auto;width:100%;scrollbar-width:none}.hero.ov-mini .pl-tools::-webkit-scrollbar{display:none}.hero.ov-mini .pl-tools a{white-space:nowrap;flex:none}}

/* v40: Mục lục nhanh dạng mind map */
.km{display:grid;gap:0;position:relative}
.km-row{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.km-b{position:relative;background:#fff;border:1.5px solid var(--kc);border-radius:12px;padding:10px 12px 12px}
.km-b h3{font:800 12px/1.2 var(--sans,Inter,sans-serif)!important;letter-spacing:.08em;text-transform:uppercase;color:#fff;background:var(--kc);display:inline-block;border-radius:99px;padding:5px 11px;margin:0 0 8px}
.km-b>div{display:flex;flex-wrap:wrap;gap:5px}
.km-k{font:600 12.5px/1.2 var(--sans,Inter,sans-serif)!important;color:#13241C!important;background:color-mix(in srgb,var(--kc) 9%,#fff)!important;border:1px solid color-mix(in srgb,var(--kc) 35%,#fff)!important;border-radius:99px!important;padding:5px 10px!important;cursor:pointer}
.km-k:hover{background:var(--kc)!important;color:#fff!important}
.km-row.up .km-b::after,.km-row.dn .km-b::before{content:"";position:absolute;left:50%;width:2px;height:60px;background:var(--kc);z-index:0}
.km-row.up .km-b::after{top:100%}.km-row.dn .km-b::before{bottom:100%}
.km-c{justify-self:center;margin:22px 0;background:#0F3324;color:#F4F3EE;border-radius:99px;padding:12px 28px;text-align:center;position:relative;z-index:1;box-shadow:0 0 0 6px #DAF1DE}
.km-c b{display:block;font:400 22px/1.15 var(--serif,Georgia,serif)}.km-c small{font-size:12px;color:rgba(244,243,238,.75)}
.km::before{content:"";position:absolute;left:16.6%;right:16.6%;top:50%;height:2px;background:#C9D6CC;z-index:0}
@media (max-width:900px){.km-row{grid-template-columns:1fr}.km-c{order:-1;margin:0 0 14px}.km{gap:14px}.km::before,.km-row .km-b::before,.km-row .km-b::after{display:none}}

/* v41: ngôi nhà content viral gọn */
.h3{--d:#0F3324;--m:#235347;--l:#DAF1DE;--g:#F5C518;--cream:#F4F3EE;max-width:980px;margin:0 auto;display:flex;flex-direction:column;align-items:center;gap:8px;color:#13241C}
.h3 button{font:inherit;cursor:pointer;border:0;transition:transform .12s,box-shadow .12s}
.h3 button:hover{transform:translateY(-1px)}
.h3 small{font-size:10.5px;font-weight:800;letter-spacing:.14em}
.h3-roof{position:relative;width:100%;margin-top:62px;background:var(--d);color:var(--cream);border-radius:0 0 8px 8px;padding:4px 18px 16px;text-align:center}
.h3-roof::before{content:"";position:absolute;left:0;right:0;bottom:calc(100% - 1px);height:64px;background:var(--d);clip-path:polygon(50% 0,100% 100%,0 100%)}
.h3-roof small{position:relative;top:-30px;display:block;height:0;color:var(--g)}
.h3-fx{margin:0;display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:6px}
.h3-fx i{font-style:normal;font-weight:800;color:var(--g)}
.h3-fx button{background:var(--g);color:#3A2C00;font-weight:800;font-size:14px;border-radius:6px;padding:7px 12px}
.h3-fx button.k{background:transparent;color:var(--cream);font-weight:600;font-size:13.5px;box-shadow:inset 0 0 0 1.5px rgba(245,197,24,.7)}
.h3-beam{width:94%;background:var(--m);border-radius:8px;padding:8px 10px 10px;text-align:center}
.h3-beam small{color:var(--l)}
.h3-beam>div{display:grid;grid-template-columns:repeat(4,1fr);gap:6px;margin-top:6px}
.h3-beam button{background:var(--cream);color:var(--d);border-radius:6px;padding:8px 6px;font-weight:700;font-size:13px;display:flex;gap:6px;align-items:center;justify-content:center}
.h3 i{font-style:normal}
.h3-beam button i,.h3-slab.s1 i{flex:none;width:20px;height:20px;border-radius:50%;background:var(--g);color:#3A2C00;display:grid;place-items:center;font-size:11px;font-weight:800}
.h3-body{width:88%;display:grid;grid-template-columns:1fr 1fr 1.5fr 1fr 1fr;gap:8px;align-items:stretch;position:relative;padding-bottom:20px}
.h3-p{background:var(--l)!important;color:var(--d);border-radius:40px 40px 6px 6px!important;padding:14px 8px!important;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;text-align:center;min-height:150px}
.h3-p i{font-size:10.5px;font-weight:800;letter-spacing:.1em;color:var(--m);text-transform:uppercase}
.h3-p b{font-size:15px;line-height:1.2}.h3-p em{font-style:normal;font-size:11.5px;color:var(--m);font-weight:700}
.h3-pl{position:absolute;bottom:0;left:0;right:0;text-align:center;color:var(--m)}
.h3-door{background:var(--cream);border:3px solid var(--g);border-radius:60px 60px 6px 6px;padding:12px 10px 10px;display:flex;flex-direction:column;gap:6px;text-align:center}
.h3-dh{background:transparent!important;color:var(--d);display:flex;flex-direction:column;align-items:center}
.h3-dh small{color:#9A7A00}.h3-dh b{font:400 22px/1.1 var(--serif,Georgia,serif);margin-top:2px}.h3-dh span{font-size:12px;color:#55605A}
.h3-dg{display:grid;grid-template-columns:1fr 1fr;gap:5px}
.h3-dg button{background:#fff;border-radius:6px;padding:7px 4px;font-weight:700;font-size:12.5px;color:var(--d);box-shadow:inset 0 0 0 1px #E6E2CF}
.h3-dx{background:#FFF7D6!important;border-radius:6px;padding:6px;font-size:11.5px;color:#5A4A00}
.h3-slab{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;border-radius:8px;padding:10px 14px;text-align:center}
.h3-slab b{font-size:15px}.h3-slab span{font-size:12.5px;opacity:.85}
.h3-slab.s1{width:90%;background:#8EB69B;color:var(--d)}
.h3-slab.s2{width:95%;background:var(--m);color:var(--cream)}
.h3-slab.s2 button{background:rgba(255,255,255,.12);color:var(--cream);border-radius:99px;padding:5px 12px;font-size:13px;font-weight:600;box-shadow:inset 0 0 0 1px rgba(255,255,255,.3)}
.h3-slab.s3{width:100%;background:var(--d);color:var(--cream)}
.h3-foot{margin:4px 0 0;font-size:12px;color:#6B756F}
@media (max-width:760px){
  .h3-roof{margin-top:44px;padding:4px 10px 12px}.h3-roof::before{height:46px}.h3-roof small{top:-22px}
  .h3-fx button{font-size:13px;padding:6px 9px}.h3-fx button.k{font-size:12.5px}
  .h3-beam,.h3-body,.h3-slab.s1,.h3-slab.s2{width:100%}
  .h3-beam>div{grid-template-columns:1fr 1fr}
  .h3-body{grid-template-columns:1fr 1fr}.h3-door{grid-column:1/-1;order:-1}.h3-p{min-height:96px}
}
.h3 .h3-slab{padding:11px 14px!important;font-size:inherit!important;line-height:1.3!important}
.h3 .h3-dg button{text-align:center!important;font-size:12.5px!important;padding:7px 4px!important;line-height:1.25!important}
.h3 .h3-dx{font-size:11.5px!important;line-height:1.3!important;padding:6px!important;text-align:center!important}
.h3 .h3-beam button{padding:8px 6px!important;font-size:13px!important;line-height:1.2!important}
.h3 .h3-fx button{line-height:1.2!important}
.h3 .h3-p{text-align:center!important}

/* v42: Viral vs Chuyển đổi tối giản */
.vx{--v:#C0503A;--vl:#F8E3DE;--c:#235347;--cl:#DAF1DE;--g:#F5C518;max-width:880px;margin:0 auto;color:#13241C}
.vx button{font:inherit;cursor:pointer;border:0}
.vx s{text-decoration:none;color:#B8860B;margin-right:3px}
.vx-venn{position:relative;width:min(460px,100%);aspect-ratio:540/351;margin:0 auto 18px}
.vx-o{position:absolute;top:0;width:65%;aspect-ratio:1;border-radius:50%;display:flex;flex-direction:column;justify-content:center;gap:4px;padding:0 6%}
.vx-o b{font-size:13px;letter-spacing:.06em;font-weight:800;white-space:nowrap}.vx-o span{font-size:13px;line-height:1.35}
.vx-o.v{left:0;background:color-mix(in srgb,var(--v) 16%,transparent);border:2px solid var(--v);color:#7A2E20;text-align:left;padding-right:38%}
.vx-o.c{right:0;background:color-mix(in srgb,var(--c) 16%,transparent);border:2px solid var(--c);color:#0F3324;text-align:right;align-items:flex-end;padding-left:38%}
.vx-mid{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:5px;width:27%}
.vx-mid small{font-size:9.5px;font-weight:800;letter-spacing:.1em;color:#6B5200}
.vx-mid .vx-ch{background:var(--g)!important;color:#3A2C00!important;border-color:var(--g)!important;width:100%;justify-content:center}
.vx-t{display:grid;gap:6px}.vx-r{display:grid;grid-template-columns:1fr 104px 1fr;gap:8px;align-items:stretch}
.vx-h{text-align:center;font-weight:800;letter-spacing:.1em;text-transform:uppercase;font-size:12.5px;color:#fff;border-radius:8px 8px 4px 4px;padding:8px}
.vx-h.v{background:var(--v)}.vx-h.c{background:var(--c)}
.vx-k{display:flex;align-items:center;justify-content:center;text-align:center;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#6B756F}
.vx-c{border-radius:6px;padding:8px 10px;font-size:13.5px;display:flex;flex-wrap:wrap;gap:5px;align-items:center;justify-content:center;text-align:center;min-height:40px}
.vx-c.v{background:var(--vl)}.vx-c.c{background:var(--cl)}
.vx-big{font:400 19px/1.2 var(--serif,Georgia,serif)}.vx-pct{font:400 26px/1 var(--serif,Georgia,serif)}
.vx .vx-ch{display:inline-flex;align-items:center;background:#fff!important;border:1px solid rgba(0,0,0,.12)!important;border-radius:99px!important;padding:5px 11px!important;font-size:12.5px!important;font-weight:700!important;line-height:1.25!important;text-align:center!important;color:#13241C!important}
.vx .vx-ch:hover{box-shadow:0 0 0 2px var(--g)}
.vx-rule{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:14px 0 0}
.vx-rule span{background:#FFF7D6;border-radius:99px;padding:6px 14px;font-size:13px;font-weight:700}
.vx-more{display:flex;justify-content:center;align-items:center;flex-wrap:wrap;gap:6px;margin-top:12px}
.vx-more small{font-size:10.5px;font-weight:800;letter-spacing:.12em;color:#6B756F;margin-right:4px}
.vx .vx-more button{border:1px solid #C9CCC2!important;border-radius:99px!important;padding:5px 12px!important;font-size:12.5px!important;background:#fff!important}
@media (max-width:640px){.vx-r{grid-template-columns:1fr 1fr;gap:5px}.vx-k{grid-column:1/-1;order:-1;justify-content:flex-start;margin-top:4px}.vx-r.hd .vx-k{display:none}
  .vx-o span{font-size:11px}.vx-o b{font-size:11px}.vx-mid .vx-ch{font-size:11px!important;padding:4px 6px!important}.vx-big{font-size:16px}}

/* v43: hook lên chóp mái */
.h3-peak{width:100%;height:230px;background:var(--g);clip-path:polygon(50% 0,100% 100%,0 100%);display:flex;flex-direction:column;justify-content:flex-end;align-items:center;gap:8px;padding:0 6% 12px;margin-bottom:-8px}
.h3-peak .h3-dh small{color:#5A4500}.h3-peak .h3-dh b{color:#13241C;font-size:24px}.h3-peak .h3-dh span{color:#3A2C00}
.h3-peak .h3-dg{display:flex;flex-wrap:wrap;justify-content:center;gap:5px}
.h3 .h3-peak .h3-dg button{background:#fff;color:#13241C;border-radius:99px!important;padding:6px 12px!important;box-shadow:none}
.h3 .h3-peak .h3-dg button.x{background:rgba(255,255,255,.45)}
.h3-roof{margin-top:0!important;border-radius:0 0 8px 8px;padding:12px 18px 14px!important}
.h3-roof::before{display:none}
.h3-roof small{position:static!important;height:auto!important;margin-bottom:8px}
.h3-body{grid-template-columns:repeat(4,1fr)!important}
.h3-p{min-height:120px}
@media (max-width:760px){.h3-peak{height:270px;padding:0 3% 10px}.h3-peak .h3-dh b{font-size:21px}.h3-body{grid-template-columns:1fr 1fr!important}}

/* v44: câu hỏi then chốt từng tầng */
.h3 .h3-q{display:block;font:italic 400 15px/1.3 var(--serif,Georgia,serif);letter-spacing:0;text-transform:none;margin:2px 0 4px}
.h3-peak .h3-q{color:#13241C;font-size:16px;margin-top:4px}
.h3-roof .h3-q,.h3-beam .h3-q{color:#F4F3EE}
.h3-pl .h3-q{display:inline;color:#13241C;margin:0 0 0 6px}
.h3-slab .h3-q{display:inline;margin:0}
.h3-slab.s1 .h3-q{color:#0F3324}.h3-slab.s2 .h3-q,.h3-slab.s3 .h3-q{color:#DAF1DE}
.h3-foot .h3-q{display:inline;font-size:13px;color:#13241C}
@media (max-width:760px){.h3-body{padding-bottom:0!important}.h3-pl{position:static!important;grid-column:1/-1}.h3-peak{height:300px!important}}

.h3-law{margin:0 0 4px;display:flex;flex-wrap:wrap;align-items:center;justify-content:center;gap:6px 8px;padding:8px 14px;border-radius:10px;background:var(--d);color:#fff;font-size:14px}
.h3-law small{font-size:10px;letter-spacing:.12em;color:var(--l);opacity:.75;margin-right:4px}
.h3-law i{font-style:normal;color:var(--g);font-weight:700}
.ov-sec .h3-law button{color:#fff!important;font-weight:700!important;padding:3px 8px!important;border-radius:6px!important;cursor:pointer}
.ov-sec .h3-law button.k{background:rgba(255,255,255,.1)!important;border:1px solid rgba(218,241,222,.35)!important}
.ov-sec .h3-law button:hover{background:rgba(245,197,24,.2)!important}
@media(max-width:600px){.h3-law{font-size:12.5px;padding:8px 10px}}

/* v52: nút liên kết thay vòng tròn nhỏ */
.vx-venn{width:min(560px,100%)}
.vx-o{gap:6px}
.vx-mini{display:flex;flex-direction:column;align-items:center;gap:0;width:100%}
.vx-mini i{font-style:normal;font-weight:800;font-size:14px;line-height:1;padding:3px 0;position:relative}
.vx-mini i::before,.vx-mini i::after{content:"";display:block;width:2px;height:6px;margin:0 auto;background:currentColor;opacity:.5}
.vx-o .vx-mini .vx-ch{width:100%;justify-content:center;background:#fff!important}
.vx-o.v .vx-mini .vx-ch{border:1.5px solid var(--v)!important;color:#7A2E20!important}
.vx-o.c .vx-mini .vx-ch{border:1.5px solid var(--c)!important;color:#0F3324!important}
.vx-o.v b,.vx-o.c b{align-self:center}
@media (max-width:640px){.vx-o .vx-mini .vx-ch{font-size:10.5px!important;padding:4px 5px!important}}
/* v49: câu hỏi then chốt ra cột trái */
.h3{max-width:1120px!important;align-items:stretch!important}
.h3-r{display:grid;grid-template-columns:210px 1fr;gap:18px;align-items:center}
.h3-rc{display:flex;flex-direction:column;align-items:center;min-width:0}
.h3-r.pk{margin-bottom:-8px}.h3-r.pk .h3-peak{margin-bottom:0}
.h3 .h3-r>.h3-q{margin:0!important;display:block;text-align:right;font-size:15px!important;color:#13241C!important;position:relative;padding-right:14px;border-right:3px solid var(--g)}
.h3-r.pk>.h3-q{align-self:end;margin-bottom:60px!important}
.h3-body .h3-pl{position:static!important;grid-column:1/-1}.h3-body{padding-bottom:0!important}
@media (max-width:760px){.h3-r{grid-template-columns:1fr;gap:4px}.h3 .h3-r>.h3-q{text-align:left;border-right:0;border-left:3px solid var(--g);padding:0 0 0 10px;font-size:14px!important}.h3-r>span{display:none}.h3-r.pk>.h3-q{margin-bottom:6px!important}.h3-r.pk{margin-bottom:0}}
/* v51: chip hook nguyên văn khoá, nới chóp mái */
.h3-peak{height:260px!important;padding:0 15% 12px!important}
@media (max-width:760px){.h3-peak .h3-dh span{display:block;max-width:170px;text-align:center}.h3-peak{height:350px!important;padding:0 9% 10px!important}.h3 .h3-peak .h3-dg button{font-size:11.5px!important;padding:5px 9px!important}}

/* v54: lưu ý hook */
.h3-nt{list-style:none;margin:2px 0 0;padding:0;display:flex;flex-wrap:wrap;justify-content:center;gap:4px 6px;max-width:560px}
.h3-nt li{font-size:12px;font-weight:700;color:#3A2C00;border:1.5px solid rgba(58,44,0,.45);border-radius:6px;padding:3px 8px;background:rgba(255,255,255,.18)}
.h3-nt li::before{content:"✓ ";color:#0F3324}
.h3-peak{height:300px!important}
@media (max-width:760px){.h3-peak{height:auto!important;padding:110px 4% 12px!important;clip-path:polygon(50% 0,100% 28%,100% 100%,0 100%,0 28%)!important}.h3-nt li{font-size:11px;padding:3px 6px}}

/* v57: 5 hướng nội dung (slide 155) */
.h3-body{grid-template-columns:repeat(5,1fr)!important;width:94%!important}
@media (max-width:760px){.h3-body{grid-template-columns:1fr 1fr!important}.h3-body .h3-p:nth-child(5){grid-column:1/-1}}
/* v58 Hình 3: chiến lược kênh & chiến lược nội dung */
.cs{--v:#C0503A;--c:#235347;--g:#F5C518;--k1:#1F6F8B;--k2:#A8740E;max-width:1040px;margin:0 auto;color:#13241C}
.cs s{text-decoration:none;color:#B8860B;margin-right:4px}
.cs-flow{list-style:none;margin:0 0 20px;padding:0;display:grid;grid-template-columns:repeat(6,1fr);gap:6px;counter-reset:x}
.cs-flow li button{width:100%;display:flex;align-items:center;gap:8px;padding:9px 10px;border:1.5px solid #CBD0C6!important;border-radius:8px;background:#fff!important;font-size:13px;font-weight:600;color:#47544C;position:relative;min-height:46px}
.cs-flow li button i{font-style:normal;flex:none;width:22px;height:22px;border-radius:50%;display:grid;place-items:center;background:#E4E6DF;font-size:12px}
.cs-flow li.on button{border-color:#13241C!important;color:#13241C;background:#FFF8DA!important;box-shadow:0 0 0 2px var(--g)}
.cs-flow li.on button i{background:#13241C;color:#fff}
.cs-grid{display:grid;grid-template-columns:1.1fr .9fr 1fr;gap:14px;align-items:start}
.cs-col{background:#fff;border:1px solid #DCDDD5;border-radius:12px;padding:14px 14px 16px;border-top:5px solid var(--kc)}
.cs-col.k1{--kc:var(--k1)}.cs-col.k2{--kc:var(--k2)}.cs-col.k3{--kc:#13241C}
.cs-col h3{margin:0;font:600 19px/1.2 var(--serif,Newsreader,serif);color:#13241C}
.cs-col h3 small{display:block;font:700 10.5px/1 var(--sans,Inter,sans-serif);letter-spacing:.14em;color:var(--kc);margin-bottom:6px}
.cs-q{margin:4px 0 12px;font-size:13px;color:#5B665F;font-style:italic}
.cs-card{display:block;width:100%;padding:10px 12px;margin-top:8px;border:1.5px solid color-mix(in srgb,var(--k1) 35%,#fff)!important;border-radius:10px;background:color-mix(in srgb,var(--k1) 6%,#fff)!important;transition:transform .15s,box-shadow .15s}
.cs-card:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(19,36,28,.12)}
.cs-card b{display:flex;align-items:center;gap:8px;font-size:15px;color:#0E3A4A}
.cs-card b em{font-style:normal;width:24px;height:24px;border-radius:50%;background:var(--k1);color:#fff;display:grid;place-items:center;font-size:13px}
.cs-card span{display:block;font-size:12.5px;color:#3E4A43;margin:5px 0 4px;line-height:1.4}
.cs-card u{text-decoration:none;font-size:11.5px;font-weight:600;color:var(--k1)}
.cs-fmt{display:block;width:100%;padding:11px 12px;margin-top:8px;border-radius:10px;border:1.5px solid color-mix(in srgb,var(--k2) 40%,#fff)!important;background:color-mix(in srgb,var(--k2) 8%,#fff)!important}
.cs-fmt b{display:block;font-size:15px;color:#6B4A08;margin-bottom:4px}
.cs-fmt span{display:block;font-size:12.5px;line-height:1.45;color:#3E4A43}
.cs-note{margin:12px 0 0;font-size:13px;font-weight:600;color:#13241C}
.cs-note small{display:block;font-size:10px;letter-spacing:.14em;color:#78837B;margin-bottom:3px}
.cs-fun{position:relative;display:grid;grid-template-columns:1fr 64px;row-gap:5px;column-gap:8px}
.cs-fun>button{grid-column:1;justify-self:center;color:#fff!important;text-align:center!important;padding:7px 4px;clip-path:polygon(0 0,100% 0,90% 100%,10% 100%);transition:filter .15s}
.cs-fun>button:hover{filter:brightness(1.1)}
.cs-fun>button.v{background:var(--v)!important}.cs-fun>button.c{background:var(--c)!important}
.cs-fun .f1{width:100%}.cs-fun .f2{width:84%}.cs-fun .f3{width:68%;margin-top:6px}.cs-fun .f4{width:52%}
.cs-fun>button b{display:block;font-size:13.5px}.cs-fun>button span{display:block;font-size:11px;opacity:.92;line-height:1.25}
.cs-br{grid-column:2;display:flex;flex-direction:column;justify-content:center;align-items:center;font:700 11px/1.1 var(--sans,Inter,sans-serif);letter-spacing:.06em;border:2px solid;border-left:0;border-radius:0 8px 8px 0;text-align:center}
.cs-br b{font-size:20px;letter-spacing:0;margin-bottom:2px}
.cs-br.v{grid-row:1/3;color:var(--v)}.cs-br.c{grid-row:3/5;color:var(--c);margin-top:6px}
.cs-rule{margin:12px 0 0;padding:8px 10px;background:#FFF8DA;border-radius:8px;font-size:12.5px;font-weight:600;line-height:1.4}
.cs-plan{margin-top:12px;display:flex;flex-wrap:wrap;gap:6px;align-items:center}
.cs-plan small{width:100%;font-size:10px;font-weight:700;letter-spacing:.14em;color:#78837B}
.cs-plan button{padding:5px 10px;border:1.5px solid #13241C!important;border-radius:99px;font-size:12px;font-weight:600}
.cs-bt{display:flex;flex-wrap:wrap;gap:6px 14px;width:100%;margin-top:14px;padding:12px 14px;border-radius:10px;background:#13241C!important;color:#F4F3EE!important}
.cs-bt small{width:100%;font-size:11px;font-weight:700;letter-spacing:.1em;color:var(--g)}
.cs-bt span{font-size:13px;padding-left:12px;position:relative}.cs-bt span::before{content:"";position:absolute;left:0;top:.55em;width:5px;height:5px;border-radius:50%;background:var(--g)}
.cs-pop .ln-pts li{margin-bottom:4px}
@media (max-width:900px){.cs-grid{grid-template-columns:1fr}.cs-flow{grid-template-columns:repeat(3,1fr)}}
@media (max-width:520px){.cs-flow{grid-template-columns:repeat(2,1fr)}.cs-flow li button{font-size:12px;padding:7px 8px}}
.ov-sec .cs-flow li button{padding:9px 10px}
.ov-sec .cs-card{padding:10px 12px}
.ov-sec .cs-fmt{padding:11px 12px}
.ov-sec .cs-fun>button{padding:7px 4px;text-align:center}
.ov-sec .cs-plan button{padding:5px 12px}
.ov-sec .cs-bt{padding:12px 16px;text-align:left}
@media (max-width:520px){.ov-sec .cs-flow li button{padding:7px 8px}}
/* v64 Hình 6: mục lục từ khoá dạng cây 5×5 */
.kt{max-width:860px;margin:0 auto;color:#13241C}
.kt ul{list-style:none;margin:0;padding:0}
.kt-bar{display:flex;flex-wrap:wrap;gap:8px;align-items:center;margin-bottom:14px}
.kt-bar span{margin-right:auto;font-size:13px;color:#5B665F}.kt-bar span b{font-size:16px;color:#13241C}
.ov-sec .kt-bar button{padding:6px 12px;border:1.5px solid #13241C;border-radius:99px;font-size:12.5px;font-weight:600;background:#fff}
.kt-tree>li{margin-bottom:10px;border:1px solid #DCDDD5;border-left:6px solid var(--kc);border-radius:12px;background:#fff;padding:6px 8px}
.kt-r{display:flex;align-items:center;gap:8px;min-height:38px}
.ov-sec .kt-tg{flex:none;width:24px;height:24px;border-radius:50%;border:1.5px solid var(--kc);color:var(--kc);display:grid;place-items:center;font-weight:700;font-size:15px;line-height:1;text-align:center}
.kt-tg::before{content:"+"}.kt-n.open>.kt-r>.kt-tg::before{content:"−"}
.kt-n.open>.kt-r>.kt-tg{background:var(--kc);color:#fff}
.kt-dot{flex:none;width:24px;display:grid;place-items:center}.kt-dot::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--kc);opacity:.6}
.ov-sec .kt-l{flex:1;min-width:0;display:flex;flex-wrap:wrap;align-items:baseline;gap:2px 10px;padding:4px 2px;border-radius:6px}
.kt-l:hover b{text-decoration:underline;text-decoration-color:var(--kc);text-underline-offset:3px}
.kt-l b{font-size:14.5px;font-weight:600}
.kt-l span{font-size:12.5px;color:#5B665F;line-height:1.35}
.d0>.kt-r .kt-l b{font:600 19px/1.2 var(--serif,Newsreader,serif);color:var(--kc)}
.kt-c{flex:none;font-size:11px;font-weight:700;color:var(--kc);background:color-mix(in srgb,var(--kc) 12%,#fff);border-radius:99px;padding:2px 8px}
.ov-sec .kt-w{flex:none;width:30px;height:30px;border-radius:50%;font-size:16px;color:#B5476F;text-align:center}
.kt-w:hover{background:#FBE7EE}.ov-sec .kt-w.on{background:#FBE7EE}
.kt-n>ul{display:none;margin-left:11px;padding-left:16px;border-left:2px solid color-mix(in srgb,var(--kc) 35%,#fff)}
.kt-n.open>ul{display:block}
.kt-n .kt-n{position:relative}
.kt-n .kt-n::before{content:"";position:absolute;left:-16px;top:19px;width:12px;border-top:2px solid color-mix(in srgb,var(--kc) 35%,#fff)}
.d1>.kt-r .kt-l b{font-size:15px}
.d3>.kt-r .kt-l b,.d4>.kt-r .kt-l b{font-weight:500;font-size:13.5px}
@media (max-width:560px){.kt-n>ul{margin-left:6px;padding-left:12px}.kt-n .kt-n::before{left:-12px;width:9px}.kt-l span{width:100%}.kt-c{display:none}}
/* v65 Hình 3 theo logic Venn + bảng so sánh */
.cs{--a:#6B5BA8;--al:#ECE8F6;--t:#1F6F8B;--tl:#DDEEF3;--n:#B5476F;--nl:#F7E1E9}
.cs .vx-ch{display:inline-flex;align-items:center;justify-content:center;background:#fff!important;border:1px solid rgba(0,0,0,.14)!important;border-radius:99px!important;padding:5px 11px!important;font-size:12px!important;font-weight:700!important;line-height:1.25!important;text-align:center!important;color:#13241C!important}
.cs .vx-ch:hover{box-shadow:0 0 0 2px var(--g)}
.cs-venn{position:relative;width:min(520px,100%);aspect-ratio:1/0.86;margin:4px auto 18px}
.cs-o{position:absolute;width:58%;aspect-ratio:1;border-radius:50%;display:flex;flex-direction:column;align-items:center;gap:6px;padding:0 8%;text-align:center}
.cs-o b{font-size:12.5px;font-weight:800;letter-spacing:.06em}
.cs-o.a{left:0;top:0;background:color-mix(in srgb,var(--a) 15%,transparent);border:2px solid var(--a);color:#3B2F70;justify-content:flex-start;padding-top:14%;align-items:flex-start;padding-left:12%}
.cs-o.t{right:0;top:0;background:color-mix(in srgb,var(--t) 15%,transparent);border:2px solid var(--t);color:#0E3A4A;justify-content:flex-start;padding-top:14%;align-items:flex-end;padding-right:12%}
.cs-o.n{left:21%;bottom:0;background:color-mix(in srgb,var(--n) 14%,transparent);border:2px solid var(--n);color:#6E1F3D;justify-content:flex-end;padding-bottom:12%}
.cs-x{position:absolute;transform:translate(-50%,-50%);font-size:11.5px;font-weight:700;background:#fff;border-radius:99px;padding:3px 9px;box-shadow:0 1px 4px rgba(0,0,0,.12);white-space:nowrap}
.cs-x.at{left:50%;top:22%}.cs-x.an{left:27%;top:62%}.cs-x.tn{left:73%;top:62%}
.cs-mid{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;flex-direction:column;align-items:center;gap:4px;width:24%}
.cs-mid small{font-size:9.5px;font-weight:800;letter-spacing:.1em;color:#6B5200}
.cs-mid .vx-ch{background:var(--g)!important;border-color:var(--g)!important;color:#3A2C00!important;width:100%}
.cs-t{display:grid;gap:6px;max-width:960px;margin:0 auto}
.cs-r{display:grid;grid-template-columns:120px repeat(3,1fr);gap:6px;align-items:stretch}
.cs-k{display:flex;align-items:center;font-size:11px;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:#6B756F}
.ov-sec .cs-h{text-align:center;font-weight:800;letter-spacing:.08em;text-transform:uppercase;font-size:12px;color:#fff;border-radius:8px 8px 4px 4px;padding:9px 6px}
.ov-sec .cs-h.an{background:var(--a)}.ov-sec .cs-h.th{background:var(--t)}.ov-sec .cs-h.nh{background:var(--n)}
.ov-sec .cs-c{border-radius:6px;padding:8px 10px;font-size:13px;line-height:1.4;text-align:center;display:flex;align-items:center;justify-content:center;min-height:44px}
.ov-sec .cs-c.an{background:var(--al)}.ov-sec .cs-c.th{background:var(--tl)}.ov-sec .cs-c.nh{background:var(--nl)}
.ov-sec .cs-c:hover{box-shadow:inset 0 0 0 2px var(--g)}
.cs-y{color:#1E7A4C}.cs-n{color:#B03A22}
.cs .vx-rule{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:14px 0 0}
.cs .vx-rule span{background:#FFF7D6;border-radius:99px;padding:6px 14px;font-size:13px;font-weight:700}
.cs-low{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-top:18px}
@media (max-width:760px){.cs-low{grid-template-columns:1fr}
  .cs-r{grid-template-columns:repeat(3,1fr);gap:4px}.cs-k{grid-column:1/-1;margin-top:4px}.cs-r.hd .cs-k{display:none}
  .ov-sec .cs-c{font-size:11.5px;padding:6px}.ov-sec .cs-h{font-size:10px;letter-spacing:.03em;padding:8px 2px}
  .cs-o b{font-size:10px}.cs .cs-o .vx-ch{font-size:10px!important;padding:3px 7px!important}.cs-x{font-size:10px;padding:2px 6px}.cs-mid .vx-ch{font-size:10.5px!important;padding:3px 5px!important}}

/* v66 phễu chiến lược nội dung: 3 tệp · trụ cột · POD */
.cs-f3,.cs-cf{margin-top:18px;background:#fff;border:1px solid #E2DED2;border-radius:12px;padding:14px 16px}
.cs-f3{border-top:4px solid var(--k2)}.cs-cf{border-top:4px solid #13241C}
.cs-f3 h3,.cs-cf h3{margin:0 0 10px;font:600 20px/1.2 var(--serif,Georgia,serif);display:flex;flex-wrap:wrap;align-items:baseline;gap:4px 10px}
.cs-f3 h3 small,.cs-cf h3 small{width:100%;font:700 10.5px var(--sans,Inter,sans-serif);letter-spacing:.14em;color:var(--k2)}.cs-cf h3 small{color:#13241C}
.cs-f3 h3 em,.cs-cf h3 em{font:italic 13px var(--sans,Inter,sans-serif);color:#5C665F}
.cs-f3g{display:grid;grid-template-columns:1fr 1fr;gap:10px}.cs-f3g .cs-fmt{margin-top:0}
.cs-cfr{margin:0 0 12px;padding:8px 12px;border-radius:8px;background:#F4F2E9;font-size:13px;line-height:1.5}.cs-cfr i{color:#5C665F;font-style:normal}
.cf-g{display:grid;grid-template-columns:200px 1.15fr 1fr 1fr;gap:6px 8px;align-items:stretch}
.cf-hd{grid-row:1;font:700 10.5px var(--sans,Inter,sans-serif);letter-spacing:.12em;text-transform:uppercase;color:#78837B;padding:0 4px}
.cf-hd.h1{grid-column:1;text-align:center}.cf-hd.h2{grid-column:2}.cf-hd.h3{grid-column:3}.cf-hd.h4{grid-column:4}
.ov-sec .cf-f{grid-column:1;justify-self:center;color:#fff;text-align:center;padding:8px 4px;clip-path:polygon(0 0,100% 0,91% 100%,9% 100%);display:flex;flex-direction:column;justify-content:center}
.cf-f.v{background:var(--v)}.cf-f.c{background:var(--c)}.cf-f:hover{filter:brightness(1.1)}
.cf-f.f1{width:100%}.cf-f.f2{width:86%}.cf-f.f3{width:72%}.cf-f.f4{width:58%}
.cf-f b{font-size:14px}.cf-f span{font-size:11px;opacity:.92;line-height:1.25}
.cf-t{grid-column:2;border-radius:10px;padding:8px 10px;display:flex;flex-direction:column;gap:6px}
.cf-t.v{background:#F8E3DE}.cf-t.c{background:#DAF1DE}
.cf-t small{font:700 10.5px var(--sans,Inter,sans-serif);letter-spacing:.1em}.cf-t.v small{color:var(--v)}.cf-t.c small{color:var(--c)}
.cf-t p{margin:0;font-size:12.5px;font-weight:600;color:#13241C}
.ov-sec .cf-tep{display:flex;gap:8px;align-items:baseline;text-align:left;padding:6px 9px;border-radius:8px;background:#fff;border:1px solid rgba(19,36,28,.12)}
.cf-tep:hover{box-shadow:inset 0 0 0 2px var(--g)}
.cf-tep b{font-size:13px;white-space:nowrap}.cf-tep span{font-size:12px;color:#3E4A43;line-height:1.35}
.ov-sec .cf-c{text-align:left;padding:8px 10px;border-radius:8px;border:1px solid #E2DED2;background:#FBFAF6;font-size:12.5px;line-height:1.4;display:flex;flex-direction:column;justify-content:center;gap:3px}
.cf-c:hover{box-shadow:inset 0 0 0 2px var(--g)}
.cf-p{grid-column:3}.cf-d{grid-column:4}
.cf-p s{text-decoration:none;align-self:flex-start;font-weight:800;font-size:11px;letter-spacing:.08em;color:#fff;border-radius:99px;padding:2px 9px}
.cf-p.v s{background:var(--v)}.cf-p.c s{background:var(--c)}
.cf-d b{color:#6B4A08}
.cs-src{font-size:11.5px;color:#78837B;margin-top:10px}
@media (max-width:760px){
  .cs-f3g{grid-template-columns:1fr}
  .cf-g{grid-template-columns:1fr 1fr;gap:5px}
  .cf-hd{display:none}
  .cf-t{grid-column:1/-1!important;grid-row:auto!important}
  .ov-sec .cf-f{grid-column:1/-1;grid-row:auto!important;width:100%!important;clip-path:none;border-radius:8px;flex-direction:row;gap:8px;align-items:baseline;justify-content:center;margin-top:4px}
  .cf-p,.cf-d{grid-row:auto!important}
  .cf-p{grid-column:1}.cf-d{grid-column:2}
  .cf-g>.v{order:2}.cf-g>.c{order:4}.cf-g>.cf-t.v{order:1}.cf-g>.cf-t.c{order:3}
}

/* v67 Venn SVG, thẻ thu gọn, phễu chiến lược nội dung */
.cs-vsvg{display:block;width:min(520px,100%);height:auto;margin:4px auto 14px;font-family:var(--sans,Inter,sans-serif);overflow:visible}
.cs-vsvg .vg{cursor:pointer}
.cs-vsvg .vg circle{stroke-width:2.5;transition:fill-opacity .15s}
.cs-vsvg .vg.a circle{fill:#6B5BA8;fill-opacity:.14;stroke:#6B5BA8}.cs-vsvg .vg.t circle{fill:#1F6F8B;fill-opacity:.14;stroke:#1F6F8B}.cs-vsvg .vg.n circle{fill:#B5476F;fill-opacity:.13;stroke:#B5476F}
.cs-vsvg .vg:hover circle{fill-opacity:.26}
.cs-vsvg text{text-anchor:middle;pointer-events:none}
.cs-vsvg .vn{font-size:15px;font-weight:800;letter-spacing:.06em}
.cs-vsvg .a .vn,.cs-vsvg .a .vs{fill:#3B2F70}.cs-vsvg .t .vn,.cs-vsvg .t .vs{fill:#0E3A4A}.cs-vsvg .n .vn,.cs-vsvg .n .vs{fill:#6E1F3D}
.cs-vsvg .vs{font-size:14px;font-weight:600}
.cs-vsvg .vx{font-size:12px;font-weight:700;fill:#13241C}
.cs-vsvg .vm{font-size:10px;font-weight:800;letter-spacing:.1em;fill:#6B5200}
.cs-vsvg .vc{cursor:pointer}.cs-vsvg .vc rect{fill:#F5C518}.cs-vsvg .vc:hover rect{fill:#FFD84A}.cs-vsvg .vc text{font-size:12px;font-weight:700;fill:#3A2C00}
.cs-cards{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin:0 auto 12px;max-width:1000px}
.cs-cd{background:#fff;border:1px solid #E2DED2;border-top:4px solid var(--cc);border-radius:10px;padding:10px 12px}
.cs-cd.an{--cc:#6B5BA8}.cs-cd.th{--cc:#1F6F8B}.cs-cd.nh{--cc:#B5476F}
.cs-cd h3{margin:0 0 6px;font:800 13px var(--sans,Inter,sans-serif)!important;letter-spacing:.08em;text-transform:uppercase;color:var(--cc)}
.cs-cd details,.cs-fd{border-top:1px solid #EEEBE2}
.cs-cd summary,.cs-fd summary,.cs-cmp summary{cursor:pointer;list-style:none;display:flex;align-items:center;gap:6px;font-size:13.5px;font-weight:700;padding:7px 0}
.cs-cd summary::-webkit-details-marker,.cs-fd summary::-webkit-details-marker,.cs-cmp summary::-webkit-details-marker{display:none}
.cs-cd summary::before,.cs-fd summary::before,.cs-cmp summary::before{content:"+";width:18px;height:18px;flex:none;border-radius:50%;display:grid;place-items:center;font-size:13px;background:#F1EFE7;color:#13241C}
.cs-cd details[open]>summary::before,.cs-fd[open]>summary::before,.cs-cmp[open]>summary::before{content:"−";background:var(--cc,#13241C);color:#fff}
.cs-cd summary i{font-style:normal;font-size:11px;color:#78837B;font-weight:600;margin-left:auto}
.cs-cd p,.cs-fd p{margin:0 0 8px;font-size:13px;line-height:1.5;color:#2A352F}
.cs-cd ul{margin:0 0 8px;padding-left:18px;font-size:13px;line-height:1.45;color:#2A352F}
.ov-sec .cs-more{margin-top:6px;font-size:12px;font-weight:700;color:var(--cc,#13241C);padding:4px 0}
.cs-cmp{max-width:1000px;margin:0 auto;background:#fff;border:1px solid #E2DED2;border-radius:10px;padding:4px 12px}
.cs-cmp[open]{padding-bottom:12px}.cs-cmp .cs-t{margin-top:6px}
.cs-fd{--cc:var(--k2);background:#FBF7EC;border:1px solid #EADFC4;border-radius:10px;padding:2px 12px}
.cs-fd summary{font-size:15px;color:#6B4A08}
/* phễu */
.cf-fun{display:flex;flex-direction:column;align-items:center;gap:4px;margin:4px 0 4px}
.cf-tag{font:800 11px var(--sans,Inter,sans-serif);letter-spacing:.08em;padding:4px 12px;border-radius:99px;margin:6px 0 2px;text-align:center}
.cf-tag.v{background:#F8E3DE;color:var(--v)}.cf-tag.c{background:#DAF1DE;color:var(--c)}
.ov-sec .cf-l{color:#fff;text-align:center;clip-path:polygon(0 0,100% 0,95% 100%,5% 100%);padding:10px 7% 12px;display:flex;flex-direction:column;align-items:center;gap:6px;transition:filter .15s}
.cf-l:hover{filter:brightness(1.08)}
.cf-l.v{background:var(--v)}.cf-l.c{background:var(--c)}
.cf-l.l1{width:100%}.cf-l.l2{width:88%}.cf-l.l3{width:76%}.cf-l.l4{width:64%}
.cf-l b{font-size:16px}.cf-l b small{font-weight:500;font-size:12px;opacity:.9;margin-left:4px}
.cf-in{display:flex;flex-wrap:wrap;justify-content:center;gap:5px}
.cf-in em,.cf-key em{font-style:normal;font-size:12px;font-weight:700;border-radius:99px;padding:3px 9px;line-height:1.25}
.cf-in .m{background:#fff;color:#13241C}.cf-in .tp{background:rgba(255,255,255,.2);border:1px solid rgba(255,255,255,.55)}.cf-in .pd{background:#F5C518;color:#3A2C00}
.cf-key{display:flex;flex-wrap:wrap;justify-content:center;gap:6px 14px;margin-top:8px;font-size:12px;color:#5C665F}
.cf-key span{display:flex;align-items:center;gap:5px}
.cf-key .m{background:#13241C;color:#fff}.cf-key .tp{background:#6B756F;color:#fff}.cf-key .pd{background:#F5C518;color:#3A2C00}
@media (max-width:760px){.cs-cards{grid-template-columns:1fr}
  .cf-l.l1{width:100%}.cf-l.l2{width:92%}.cf-l.l3{width:84%}.cf-l.l4{width:76%}
  .ov-sec .cf-l{padding:8px 6% 10px}.cf-l b{font-size:14px}.cf-l b small{display:block;margin:0}.cf-in em{font-size:10.5px;padding:2px 7px}}

.cs-f3g{align-items:start}.cs-fd{width:100%}
@media (max-width:760px){.cs-vsvg .vn{font-size:17px}.cs-vsvg .vs{font-size:15px}.cs-vsvg .vx{font-size:14px}.cs-vsvg .vc text{font-size:13px}}
/* v80: Hình 1 Cấu trúc chiến lược tối giản */
.sm{display:flex;flex-direction:column;align-items:center;gap:0;padding:6px 0 4px}
.sm-goal{background:#051F20;color:#DAF1DE;border:2px solid #F5C518;border-radius:999px;padding:9px 22px;font-family:var(--serif);font-size:18px}
.sm-ar{font-style:normal;color:#9AA39C;font-size:11px;line-height:1;padding:3px 0}
.ov-sec button.sm-l{display:grid;grid-template-columns:34px minmax(150px,240px) 1fr;align-items:center;gap:12px;text-align:left;border:0;border-radius:8px;padding:9px 14px;cursor:pointer;background:var(--band);color:var(--bink);font:inherit;transition:transform .12s,box-shadow .12s}
.ov-sec button.sm-l:hover,.ov-sec button.sm-l:focus-visible{transform:translateY(-1px);box-shadow:0 0 0 2px #F5C518}
.sm-l>b{width:30px;height:30px;border-radius:50%;display:grid;place-items:center;font-family:var(--serif);font-size:16px;font-weight:500;background:rgba(255,255,255,.14);border:1px solid currentColor}
.sm-t{display:flex;flex-direction:column;font-weight:600;font-size:14.5px;line-height:1.25}
.sm-t small{font-weight:400;font-size:12px;color:var(--bsub);margin-top:2px}
.sm-c{font-size:12px;color:var(--bsub);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.sm-l[data-n="1"]{--band:#051F20;--bink:#DAF1DE;--bsub:rgba(218,241,222,.72)}
.sm-l[data-n="2"]{--band:#0B2B26;--bink:#DAF1DE;--bsub:rgba(218,241,222,.72)}
.sm-l[data-n="3"]{--band:#163832;--bink:#DAF1DE;--bsub:rgba(218,241,222,.74)}
.sm-l[data-n="4"]{--band:#235347;--bink:#DAF1DE;--bsub:rgba(218,241,222,.76)}
.sm-l[data-n="5"]{--band:#2F5F50;--bink:#F2FAF3;--bsub:rgba(242,250,243,.8)}
.sm-l[data-n="6"]{--band:#3D6B5C;--bink:#F2FAF3;--bsub:rgba(242,250,243,.82)}
.sm-l[data-n="7"]{--band:#5E8F78;--bink:#F2FAF3;--bsub:rgba(242,250,243,.88)}
.sm-l[data-n="8"]{--band:#8EB69B;--bink:#051F20;--bsub:rgba(5,31,32,.72)}
.sm-l[data-n="9"]{--band:#DAF1DE;--bink:#051F20;--bsub:rgba(5,31,32,.7)}
.sm-note{font-size:12.5px;color:var(--muted);margin:12px 0 0;text-align:center}
.sm-pop .sm-gap{font-size:13px;font-weight:600;color:#1D5A40;background:#E6F2EA;border-radius:6px;padding:7px 10px;margin:6px 0}
.sm-nd{border-top:1px solid var(--line);padding:10px 0}
.sm-nd b{font-family:var(--serif);font-weight:500;font-size:17px}
.sm-nd em{font-style:normal;color:#C79300;margin-right:4px}
.sm-nd small{display:block;color:var(--muted);font-size:12.5px}
.sm-nd p{margin:4px 0 6px;font-size:13.5px;line-height:1.5}
.sm-lk{display:flex;flex-wrap:wrap;gap:5px}
@media (max-width:760px){.ov-sec button.sm-l{grid-template-columns:30px 1fr;gap:10px;padding:8px 10px}.sm-c{display:none}.sm-goal{font-size:16px}}
/* v82: nút Quy trình / Phần thưởng trong Thư viện */
.lib-go{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin:0 0 16px}
.lib-go a{display:grid;grid-template-columns:auto 1fr auto;grid-template-rows:auto auto;column-gap:14px;align-items:center;background:#F4F3EE;color:#13241C;border-radius:8px;padding:16px 18px;text-decoration:none;border:2px solid transparent;transition:border-color .12s,transform .12s}
.lib-go a:hover,.lib-go a:focus-visible{border-color:#F5C518;transform:translateY(-1px)}
.lib-go span{grid-row:span 2;font-size:28px}
.lib-go b{font-family:var(--serif);font-weight:500;font-size:21px}
.lib-go small{grid-column:2;font-size:13px;color:#5D6A62;line-height:1.4}
.lib-go i{grid-row:1/3;grid-column:3;font-style:normal;font-weight:700;font-size:13px;color:#1D5A40;background:#DDEDE2;border-radius:99px;padding:5px 12px}
@media (max-width:640px){.lib-go{grid-template-columns:1fr}}

/* v90 · Tổng quan: menu cố định bên trái trên màn rộng */
@media (min-width:1100px){
  .ov{display:grid;grid-template-columns:240px minmax(0,1fr);column-gap:22px;align-items:start}
  .ov>.ov-side{grid-column:1;grid-row:1/span 40;position:sticky;top:76px;margin:14px 0;flex-direction:column;align-items:stretch;flex-wrap:nowrap;gap:8px;padding:14px 12px;overflow:hidden}
  .ov>.ov-sec{scroll-margin-top:76px}
  .ov>.ov-sec{grid-column:2;min-width:0}
  .ov-side h1{font-size:22px;margin:0}
  .ov-side .ov-jump{flex-direction:column;flex-wrap:nowrap;gap:4px;margin:0}
  .hero.ov-mini.ov-side .ov-jump a,.hero.ov-mini.ov-side .ov-wish{border-radius:6px;padding:6px 10px;font-size:13px;line-height:1.3;text-align:left;border-color:transparent;white-space:normal}
  .ov-side .ov-jump a.on{background:#DAF1DE;color:#0B2B26}
  .ov-side .ov-jump .ov-gift{order:9;margin-top:6px;border-color:rgba(245,197,24,.5)!important}
  .ov-side .ov-jump .ov-wish{order:10;border-color:rgba(218,241,222,.35)!important}
}
@media (min-width:1100px) and (max-height:560px){.ov>.ov-side{position:static}}
/* v101 Thư viện: video gộp theo ngày */
.lib2 .t4.lb-v>.tn{width:400px;align-items:flex-start;padding:9px 8px 9px 12px;border-style:solid;border-left:4px solid var(--mc);background:#fff;color:#3E4A43;font-size:13.5px}
.lib2 .t4.lb-v>.tn b{display:block;font-size:14.5px;color:#13241C;line-height:1.3}
.lib2 .t4.lb-v>.tn .tl{flex:1;cursor:pointer}
.lib2 .t4.lb-v>.tn .tg{align-self:flex-start;margin-top:2px}
@media(max-width:720px){.lib2 .t4.lb-v>.tn{width:auto}}

/* v106 bảng chủ đề / cách thể hiện */
.ln-lead{margin:0 0 8px;font-size:15px;color:var(--ink2,#3E4A43);line-height:1.55}
.ln-tbl{counter-reset:li;list-style:none;margin:6px 0 10px;padding:0}
.ln-tbl li{counter-increment:li;display:grid;grid-template-columns:30px minmax(150px,240px) 1fr;gap:10px;align-items:baseline;padding:8px 0;border-bottom:1px solid #E4E3DC;font-size:14.5px;line-height:1.5}
.ln-tbl li::before{content:counter(li);position:static;width:auto;height:auto;border-radius:0;background:none;font-weight:800;color:var(--mc,#235347);font-size:13px}
.ln-tbl li b{font-weight:700;color:#13241C}.ln-tbl li span{color:#3E4A43}
@media(max-width:640px){.ln-tbl li{grid-template-columns:26px 1fr}.ln-tbl li span{grid-column:2}}

/* v107 liên kết chéo trong cửa sổ học */
.ln-xl .ln-chip{display:inline-flex;align-items:center;gap:6px;cursor:pointer;font:inherit;font-size:13.5px}
.ln-xl .ln-chip i{width:9px;height:9px;border-radius:50%;background:var(--mc);flex:none}
.ln-xl .ln-chip small{color:#8A938C;font-size:11.5px}
.ln-xl .ln-nt{border-color:#9DBFA8;background:#EEF6F0}
/* v134: popup nền xanh rất đậm, thành phần bên trong sáng để nổi bật */
.ln-box{--ink:#EEF6F0;--ink2:#D5E5DC;--muted:#9CC5B0;--line:#2C5446;background:#0B241E;color:var(--ink)}
.ln-h{background:#0F2A23;border-bottom-color:#2C5446}
.ln-h h2{color:#fff}.ln-h p{color:#B9CFC2}
.ln-crumb{color:#9CC5B0}
.ln-btn{background:#16362D;color:#EEF6F0;border-color:#2C5446}.ln-btn:hover{border-color:#F2C230}
.ln-btn.ghost{color:#B9CFC2}.ln-btn.on{background:#FFE9EC;color:#A3253A;border-color:#E58A98}
.ln-x{background:#16362D;color:#fff}.ln-x:hover{background:#2C5446}
.ln-main h3,.ln-side h3{color:#9CC5B0}
.ln-kw{background:#F2C230;color:#16201B}.ln-kw small{color:#6B4E00}.ln-kw b{color:#16201B}
.ln-pts li{background:#fff;color:#16201B;border:0;border-radius:8px;margin-bottom:8px;padding:10px 14px 10px 30px}
.ln-pts li::before{left:12px;top:19px;background:#235347}
.ln-pts li *{color:inherit}
.ln-slides button{border-color:#2C5446}.ln-slides button:hover{box-shadow:0 0 0 2px #F2C230}
.ln-side{background:#0F2A23;border-color:#2C5446}
.ln-note textarea{border-color:#2C5446;color:#16201B}
.ln-log{border-color:#2C5446;color:#16201B}
.ln-log .ln-empty{color:#5D6A62}
.ln-m.a{color:#16201B}
.ln-form input{border-color:#2C5446;color:#16201B}
.ln-form button{background:#F2C230;color:#16201B}
.ln-off{color:#9CC5B0}
.ln-main .md,.ln-main p{color:#EEF6F0}
.ln-main a:not(.ln-chip){color:#F2C230}
/* khung Hỏi AI cũng nền xanh đậm */
.ai-w .ai-p{background:#0B241E;color:#EEF6F0;border:1px solid #2C5446}
.ai-w .ai-p .ai-empty,.ai-w .ai-p .ai-m.ld{color:#B9CFC2}
.ai-w .ai-p .ai-modes button{background:#16362D;color:#EEF6F0;border-color:#2C5446}
.ai-w .ai-p .ai-modes button.on{background:#F2C230;border-color:#F2C230;color:#16201B}
.ai-w .ai-p .ai-m.u{background:#F2C230;color:#16201B}
.ai-w .ai-p .ai-m.a{color:#16201B;border-color:#fff}
.ai-w .ai-p .ai-f{background:#0F2A23;border-top-color:#2C5446}
.ai-w .ai-p .ai-f button{background:#F2C230;color:#16201B}
/* v144: xem slide gần toàn màn hình, ảnh nét 1920px */
#lb{padding:60px 8px 4px;background:rgba(4,10,8,.96)}
#lb img{width:min(calc(100vw - 16px),calc((100vh - 110px) * 16 / 9));height:auto;max-width:none;max-height:none;border-radius:4px}
#lb:fullscreen img,#lb.big img{width:min(calc(100vw - 16px),calc((100vh - 100px) * 16 / 9))}
#lb .cap{margin-top:8px;font-size:13px}
#lb .fs{position:absolute;top:8px;right:62px;background:rgba(255,255,255,.14);border:0;color:#fff;border-radius:999px;width:44px;height:44px;cursor:pointer;font-size:20px;z-index:2}
#lb .x{top:8px;right:10px;z-index:2}
#lb .pv,#lb .nx{z-index:2;background:rgba(0,0,0,.55);box-shadow:0 0 0 1px rgba(255,255,255,.3)}
#lb .fs:hover,#lb .pv:hover,#lb .nx:hover,#lb .x:hover{background:#235347}

.cf2{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.cf2-c{border-radius:12px;padding:12px;background:#0F2A23}
.cf2-c h4{margin:0 0 10px;color:#fff;font:800 15px "Be Vietnam Pro",Arial,sans-serif;display:flex;flex-direction:column;gap:2px}
.cf2-c h4 span{font-weight:500;font-size:12.5px;color:#C9D6CE}
.cf2-c.v h4{color:#FFB4A3}.cf2-c.c h4{color:#8EE0A8}
.ov-sec .cf2-r{display:flex;align-items:center;gap:10px;width:100%;text-align:left;background:#fff;color:#111;border-radius:10px;padding:10px 12px;margin-top:8px;font-family:"Be Vietnam Pro",Arial,sans-serif;cursor:pointer}
.cf2-r:hover{box-shadow:0 0 0 2px #F2C230}
.cf2-r i{font-style:normal;flex:none;width:24px;height:24px;border-radius:50%;display:grid;place-items:center;font-weight:800;font-size:12px;color:#fff;background:#0F2A23}
.cf2-r span{flex:1;display:flex;flex-direction:column;font-size:12.5px;color:#444;line-height:1.35}
.cf2-r span b{font-size:15px;color:#111}
.cf2-r em{font-style:normal;font-weight:800;font-size:12px;letter-spacing:.06em;padding:4px 10px;border-radius:99px;color:#fff}
.cf2-c.v .cf2-r em{background:#C0503A}.cf2-c.c .cf2-r em{background:#1E7A4C}
.cf2-h{margin:8px 0 0;font-size:12px;color:#5C665F;text-align:center}
@media(max-width:640px){.cf2{grid-template-columns:1fr}}