:root{
  --teal:#15616d;--teal-600:#11545f;--teal-700:#0e4852;--teal-800:#0b3a42;--teal-900:#072a30;
  --teal-50:#eaf4f4;--teal-100:#d2e7e8;--mint:#6ce6ab;--mint-2:#99f7c6;--c1:#2fb3a4;
  --ink:#0f2629;--ink-2:#4a6467;--line:#d8e4e5;--line-2:#bfd3d5;--bg:#f5f9f9;--card:#fff;
  --r:18px;--sh:0 1px 2px rgba(7,42,48,.06),0 18px 40px -24px rgba(11,58,66,.45);
  --head:"Plus Jakarta Sans",system-ui,sans-serif;--body:"Be Vietnam Pro",system-ui,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 var(--body);overflow-x:hidden}
img{max-width:100%;display:block}
button,input,select,textarea{font:inherit;color:inherit}
button{cursor:pointer}
a{color:inherit}
:focus-visible{outline:3px solid var(--mint);outline-offset:2px}

/* đầu trang */
.top{position:absolute;inset:0 0 auto;z-index:5;display:flex;align-items:center;justify-content:space-between;padding:16px clamp(16px,4vw,48px);color:#fff}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none}
.brand svg{width:30px;height:30px;color:var(--mint)}
.brand b{font:800 20px/1 var(--head);letter-spacing:-.02em}
.brand span{font:600 12px/1 var(--head);letter-spacing:.14em;text-transform:uppercase;padding:5px 8px;border:1px solid rgba(255,255,255,.3);border-radius:99px;color:var(--mint-2)}
.top-nav{display:flex;gap:6px;align-items:center}
.top-nav a{text-decoration:none;font-weight:600;font-size:14px;padding:9px 14px;border-radius:99px;color:rgba(255,255,255,.86)}
.top-nav a:hover{background:rgba(255,255,255,.1);color:#fff}
.top-nav .cta{background:var(--mint);color:var(--teal-900)}
.top-nav .cta:hover{background:var(--mint-2);color:var(--teal-900)}

/* hero */
.hero{position:relative;overflow:hidden;color:#fff;padding:120px clamp(16px,4vw,48px) 54px;
  background:radial-gradient(1200px 500px at 85% -10%,rgba(108,230,171,.22),transparent 60%),
             radial-gradient(800px 420px at 0% 110%,rgba(47,179,164,.28),transparent 60%),
             linear-gradient(160deg,var(--teal-700),var(--teal-900) 70%)}
.hero-orbit{position:absolute;right:-140px;top:-90px;width:620px;height:620px;color:rgba(153,247,198,.16);pointer-events:none;animation:spin 120s linear infinite}
.hero-orbit svg{width:100%;height:100%}
.hero-orbit g{stroke-width:1.2}
@keyframes spin{to{transform:rotate(360deg)}}
@media (prefers-reduced-motion:reduce){.hero-orbit{animation:none}}
.hero-in{position:relative;max-width:880px;margin:0 auto;text-align:center}
.eyebrow{margin:0 0 14px;font:600 13px/1.4 var(--head);letter-spacing:.08em;text-transform:uppercase;color:var(--mint-2)}
h1{margin:0 0 28px;font:800 clamp(30px,5vw,54px)/1.08 var(--head);letter-spacing:-.03em}
.search{position:relative;display:flex;align-items:center;gap:6px;background:#fff;border-radius:20px;padding:7px 7px 7px 16px;box-shadow:0 24px 60px -20px rgba(0,0,0,.55),0 0 0 6px rgba(255,255,255,.08);color:var(--ink)}
.search .ico{width:22px;height:22px;flex:none;color:var(--teal)}
.search input{flex:1;min-width:0;border:0;outline:0;background:none;font-size:17px;padding:12px 4px}
.search input::-webkit-search-cancel-button{display:none}
.search .clear{border:0;background:var(--teal-50);width:30px;height:30px;border-radius:50%;font-size:20px;line-height:1;color:var(--ink-2)}
.ask-btn{display:flex;align-items:center;gap:8px;border:0;border-radius:14px;padding:12px 18px;font-weight:700;color:var(--teal-900);
  background:linear-gradient(135deg,var(--mint),var(--c1));box-shadow:0 8px 20px -10px rgba(47,179,164,.9)}
.ask-btn svg{width:18px;height:18px}
.ask-btn:hover{filter:brightness(1.05)}
.hints{display:flex;flex-wrap:wrap;justify-content:center;gap:8px;margin-top:18px;font-size:13px;color:rgba(255,255,255,.7)}
.hints span{align-self:center}
.hints button{border:1px solid rgba(255,255,255,.22);background:rgba(255,255,255,.06);color:#fff;border-radius:99px;padding:6px 13px;font-size:13px}
.hints button:hover{background:rgba(255,255,255,.16);border-color:rgba(153,247,198,.6)}

/* thanh lọc */
.bar{position:sticky;top:0;z-index:4;background:rgba(245,249,249,.92);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid var(--line)}
.bar-in{max-width:1280px;margin:0 auto;padding:12px clamp(16px,4vw,48px) 10px}
.pills,.tags{display:flex;gap:8px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.pills::-webkit-scrollbar,.tags::-webkit-scrollbar{display:none}
.pill{flex:none;border:1px solid var(--line-2);background:#fff;border-radius:99px;padding:8px 15px;font:600 14px/1 var(--head);color:var(--teal-800);white-space:nowrap}
.pill:hover{border-color:var(--teal)}
.pill[aria-selected="true"]{background:var(--teal-800);border-color:var(--teal-800);color:#fff}
.bar-row{display:flex;gap:12px;align-items:center;margin-top:10px}
.tags{flex:1;min-width:0}
.tag{flex:none;display:flex;align-items:center;gap:6px;border:1px dashed var(--line-2);background:transparent;border-radius:10px;padding:6px 11px;font-size:13px;color:var(--ink-2);white-space:nowrap}
.tag:hover{color:var(--ink);border-color:var(--teal)}
.tag[aria-pressed="true"]{border-style:solid;border-color:var(--c1);background:rgba(108,230,171,.2);color:var(--teal-900);font-weight:600}
.tag[aria-pressed="true"]::before{content:"✓";font-weight:800}
.sort{flex:none;display:flex;align-items:center;gap:6px;font-size:13px;color:var(--ink-2)}
.sort select{border:1px solid var(--line-2);border-radius:10px;background:#fff;padding:6px 8px;font-size:13px}

/* lưới */
.wrap{max-width:1280px;margin:0 auto;padding:18px clamp(16px,4vw,48px) 80px}
.result{margin:0 0 14px;font-size:14px;color:var(--ink-2);min-height:22px}
.result b{color:var(--ink)}
.result .ai-note{color:var(--teal);font-weight:600}
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(290px,1fr));gap:22px}
.card{background:var(--card);border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s;content-visibility:auto;contain-intrinsic-size:auto 420px}
.card:hover{transform:translateY(-3px);box-shadow:0 1px 2px rgba(7,42,48,.06),0 26px 50px -24px rgba(11,58,66,.55)}
.media{position:relative;display:block;border:0;padding:0;aspect-ratio:16/9;overflow:hidden;width:100%;
  background:var(--teal-100);background:linear-gradient(135deg,color-mix(in srgb,var(--p1,#15616d) 45%,#eaf4f4),color-mix(in srgb,var(--p2,#6ce6ab) 45%,#eaf4f4))}
.media::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,transparent 30%,rgba(255,255,255,.35) 50%,transparent 70%) -100% 0/200% 100% no-repeat;animation:sheen 1.4s ease-in-out infinite}
.media.ok::after{display:none}
@keyframes sheen{to{background-position:200% 0}}
@media (prefers-reduced-motion:reduce){.media::after{animation:none}}
.media img{width:100%;height:100%;object-fit:cover;opacity:0;transition:opacity .4s ease,transform .5s}
.media.ok img{opacity:1}
.card:hover .media img{transform:scale(1.04)}
.chip{position:absolute;font:600 11.5px/1 var(--head);padding:6px 9px;border-radius:99px;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px)}
.c-nhom{left:10px;top:10px;background:rgba(7,42,48,.62);color:#fff}
.c-n{right:10px;bottom:10px;background:rgba(255,255,255,.88);color:var(--teal-900)}
.c-n:empty{display:none}
.peek{position:absolute;left:50%;top:50%;transform:translate(-50%,-40%);opacity:0;transition:.25s;background:rgba(7,42,48,.78);color:#fff;font:700 13px/1 var(--head);padding:10px 15px;border-radius:99px}
.media:hover .peek,.media:focus-visible .peek{opacity:1;transform:translate(-50%,-50%)}
.body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:6px;flex:1}
.kind{margin:0;font:600 12px/1.3 var(--head);letter-spacing:.06em;text-transform:uppercase;color:var(--c1)}
.card h3{margin:0;font:700 17.5px/1.3 var(--head);letter-spacing:-.01em}
.card h3 a{text-decoration:none}
.card h3 a:hover{color:var(--teal)}
.desc{margin:0;font-size:14px;color:var(--ink-2);display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.why{margin:2px 0 0;font-size:13.5px;color:var(--teal-800);background:rgba(108,230,171,.18);border-left:3px solid var(--c1);padding:7px 10px;border-radius:0 10px 10px 0}
.mini{list-style:none;display:flex;flex-wrap:wrap;gap:5px;margin:auto 0 0;padding:6px 0 0}
.mini li{font-size:11.5px;padding:3px 8px;border-radius:7px;background:var(--teal-50);color:var(--teal-700)}
.mini li.hit{background:rgba(108,230,171,.35);color:var(--teal-900);font-weight:600}
.more{height:1px}
.empty{text-align:center;padding:50px 0;color:var(--ink-2)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:12px;padding:11px 16px;background:var(--teal-800);color:#fff;font-weight:700;text-decoration:none;font-size:14px}
.btn:hover{background:var(--teal)}
.btn.ghost{background:transparent;color:var(--teal-800);border:1px solid var(--line-2)}
.btn.ghost:hover{border-color:var(--teal);background:var(--teal-50)}
.foot{text-align:center;font-size:13px;color:var(--ink-2);padding:0 16px 40px}

/* xem nhanh */
.qv{border:0;padding:0;border-radius:22px;width:min(1180px,96vw);max-height:92vh;overflow:hidden;box-shadow:0 40px 120px -20px rgba(0,0,0,.6);background:#fff;color:var(--ink)}
.qv::backdrop{background:rgba(7,42,48,.66);backdrop-filter:blur(4px)}
.qv-in{display:grid;grid-template-columns:1.65fr 1fr;height:min(680px,88vh)}
.qv-stage{position:relative;background:var(--teal-900)}
.qv-stage iframe,.qv-stage img{position:absolute;inset:0;width:100%;height:100%;border:0;object-fit:cover}
.qv-stage iframe{z-index:2;background:#000}
.qv-stage iframe:not([src]){display:none}
.qv-play{position:absolute;z-index:1;left:50%;top:50%;transform:translate(-50%,-50%);display:flex;align-items:center;gap:8px;border:0;border-radius:99px;padding:13px 20px;background:var(--mint);color:var(--teal-900);font:700 15px/1 var(--head);box-shadow:0 14px 30px -10px rgba(0,0,0,.6)}
.qv-play svg{width:18px;height:18px}
.qv-info{position:relative;overflow-y:auto;padding:26px 24px 22px;display:flex;flex-direction:column;gap:8px}
.qv-info h2{margin:0;font:800 24px/1.2 var(--head);letter-spacing:-.02em;padding-right:34px}
.qv-info p{margin:0;font-size:14.5px}
.qv-info .meta{color:var(--ink-2);font-size:13px}
.feats{margin:4px 0;padding-left:18px;font-size:14px}
.feats li{margin:2px 0}
.qv-more p{font-size:13.5px;color:var(--ink-2);margin-top:6px}
.qv-more b{color:var(--ink)}
.qv-tags{display:flex;flex-wrap:wrap;gap:5px;margin-top:4px}
.qv-tags span{font-size:12px;padding:4px 9px;border-radius:7px;background:var(--teal-50);color:var(--teal-700)}
.qv-act{display:flex;flex-wrap:wrap;gap:8px;margin-top:auto;padding-top:14px}
.x{position:absolute;right:14px;top:14px;width:36px;height:36px;border-radius:50%;border:0;background:var(--teal-50);font-size:22px;line-height:1;color:var(--ink-2)}
.x:hover{background:var(--teal-100);color:var(--ink)}

/* trợ lý */
.fab{position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:20;display:flex;align-items:center;gap:9px;border:0;border-radius:99px;padding:13px 18px 13px 15px;
  background:linear-gradient(135deg,var(--teal-700),var(--teal-900));color:#fff;font:700 15px/1 var(--head);box-shadow:0 18px 40px -14px rgba(7,42,48,.8),0 0 0 3px rgba(108,230,171,.35)}
.fab svg{width:20px;height:20px;color:var(--mint)}
.fab[aria-expanded="true"]{display:none}
.chat{position:fixed;right:clamp(14px,3vw,28px);bottom:clamp(14px,3vw,28px);z-index:21;width:min(420px,calc(100vw - 28px));height:min(640px,calc(100dvh - 40px));display:flex;flex-direction:column;
  background:#fff;border-radius:22px;box-shadow:0 30px 90px -20px rgba(7,42,48,.6),0 0 0 1px var(--line);overflow:hidden;animation:pop .22s ease-out}
.chat[hidden]{display:none}
@keyframes pop{from{opacity:0;transform:translateY(14px) scale(.98)}}
.chat header{display:flex;align-items:center;justify-content:space-between;padding:14px 14px 12px 16px;background:linear-gradient(135deg,var(--teal-700),var(--teal-900));color:#fff}
.chat .who{display:flex;gap:10px;align-items:center}
.chat .who i{width:34px;height:34px;border-radius:50%;background:conic-gradient(from 0deg,var(--mint),var(--c1),var(--teal),var(--mint));box-shadow:inset 0 0 0 7px var(--teal-800)}
.chat .who b{display:block;font:700 15px/1.2 var(--head)}
.chat .who small{font-size:12px;color:var(--mint-2)}
.chat header .x{position:static;background:rgba(255,255,255,.12);color:#fff}
.log{flex:1;overflow-y:auto;padding:16px 14px;display:flex;flex-direction:column;gap:12px;background:var(--bg)}
.msg{max-width:88%;padding:10px 13px;border-radius:16px;font-size:14.5px;line-height:1.5;white-space:pre-wrap}
.msg.me{align-self:flex-end;background:var(--teal-800);color:#fff;border-bottom-right-radius:5px}
.msg.ai{align-self:flex-start;background:#fff;border:1px solid var(--line);border-bottom-left-radius:5px}
.msg.err{border-color:#f0c9b8;background:#fff6f2}
.msg.wait{color:var(--ink-2)}
.msg.wait i{display:inline-block;width:6px;height:6px;margin:0 2px;border-radius:50%;background:var(--c1);animation:dot 1s infinite}
.msg.wait i:nth-child(2){animation-delay:.15s}.msg.wait i:nth-child(3){animation-delay:.3s}
@keyframes dot{50%{opacity:.25;transform:translateY(-3px)}}
.picks{display:flex;flex-direction:column;gap:8px;align-self:stretch}
.pick{display:grid;grid-template-columns:96px 1fr;gap:10px;align-items:center;text-align:left;border:1px solid var(--line);background:#fff;border-radius:14px;padding:7px;transition:border-color .2s}
.pick:hover{border-color:var(--c1)}
.pick img{width:96px;height:58px;object-fit:cover;border-radius:9px}
.pick b{display:block;font:700 14px/1.25 var(--head)}
.pick small{display:block;font-size:12.5px;color:var(--ink-2);margin-top:2px}
.sugs{display:flex;flex-wrap:wrap;gap:6px}
.sugs button{border:1px solid var(--line-2);background:#fff;border-radius:99px;padding:6px 11px;font-size:13px;color:var(--teal-800)}
.sugs button:hover{border-color:var(--teal);background:var(--teal-50)}
.say{display:flex;gap:8px;align-items:flex-end;padding:10px;border-top:1px solid var(--line);background:#fff}
.say textarea{flex:1;resize:none;border:1px solid var(--line-2);border-radius:14px;padding:10px 12px;max-height:120px;outline:0;font-size:15px}
.say textarea:focus{border-color:var(--teal)}
.say button{flex:none;width:42px;height:42px;border-radius:12px;border:0;background:var(--teal-800);color:var(--mint)}
.say button svg{width:20px;height:20px}
.say button:disabled{opacity:.5}
.note{margin:0;padding:0 12px 9px;font-size:11px;color:var(--ink-2);background:#fff;text-align:center}

/* điện thoại */
@media (max-width:860px){
  .qv-in{grid-template-columns:1fr;grid-template-rows:minmax(220px,46vh) auto;height:auto;max-height:92vh;overflow-y:auto}
  .qv-info{overflow:visible}
}
@media (max-width:640px){
  .top-nav a:not(.cta){display:none}
  .hero{padding:96px 16px 36px}
  .search{border-radius:16px;padding:5px 5px 5px 12px}
  .search input{font-size:16px;padding:10px 2px}
  .ask-btn{padding:11px 12px}
  .ask-btn span{display:none}
  .hints button:nth-of-type(n+4){display:none}
  .bar-in{padding:10px 16px 8px}
  .sort span{display:none}
  .grid{grid-template-columns:1fr;gap:16px}
  .fab span{display:none}
  .fab{padding:14px}
  .chat{right:0;bottom:0;width:100vw;height:100dvh;border-radius:0}
}
/* điện thoại xoay ngang */
@media (max-height:480px) and (orientation:landscape){
  .hero{padding:72px 16px 22px}
  h1{font-size:26px;margin-bottom:14px}
  .hero-orbit{display:none}
  .qv-in{height:94vh}
  .chat{height:calc(100dvh - 20px);bottom:10px}
}