:root{--bg:#0A0F17;--bg2:#0D1420;--surface:#111925;--surface2:#16202F;--line:#223047;--fg:#E9EFF7;--muted:#9EADC0;--dim:#7D8DA3;--accent:#4F8BFF;--accent-strong:#2F6FEB;--accent-soft:rgba(79,139,255,.14);--ok:#34D399;--warn:#FBBF24;--bad:#F87171;--sans:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;--mono:"JetBrains Mono",ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;--r:16px;--max:1180px;color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{animation:none!important;transition:none!important}}
body{margin:0;background:var(--bg);color:var(--fg);font:400 17px/1.65 var(--sans);overflow-x:hidden}
html[data-lang="en"] .vi,html[data-lang="vi"] .en{display:none!important}
a{color:#8DB3FF;text-underline-offset:3px}
a:hover{color:#B7CEFF}
img,video,svg{max-width:100%}
code,kbd,.mono{font-family:var(--mono);font-size:.88em}
code{background:var(--surface2);border:1px solid var(--line);border-radius:6px;padding:1px 6px;overflow-wrap:anywhere}
pre{margin:0;background:#070B11;border:1px solid var(--line);border-radius:12px;padding:16px 18px;overflow-x:auto;font:400 14.5px/1.6 var(--mono);color:#D5E0EE}
pre code{background:none;border:0;padding:0;font-size:inherit}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(36px,6vw,64px);font-weight:800}
h2{font-size:clamp(28px,4vw,42px);font-weight:800}
h3{font-size:21px;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
.wrap{max-width:var(--max);margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:8px;background:var(--accent-strong);color:#fff;padding:8px 14px;border-radius:8px;z-index:100}
.skip:focus{left:12px}
:focus-visible{outline:3px solid #8DB3FF;outline-offset:2px;border-radius:6px}

.nav{position:sticky;top:0;z-index:50;background:rgba(10,15,23,.82);backdrop-filter:saturate(1.4) blur(12px);-webkit-backdrop-filter:saturate(1.4) blur(12px);border-bottom:1px solid rgba(34,48,71,.7)}
.nav .wrap{display:flex;align-items:center;gap:20px;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--fg);text-decoration:none;letter-spacing:-.01em;flex:0 0 auto}
.logo img{width:32px;height:32px;display:block}
.nav ul{display:flex;gap:4px;list-style:none;margin:0 0 0 auto;padding:0}
.nav ul a{display:block;padding:8px 12px;border-radius:8px;color:var(--muted);text-decoration:none;font-size:15px;font-weight:500}
.nav ul a:hover,.nav ul a[aria-current="page"]{color:var(--fg);background:var(--surface2)}
.langbtn{flex:0 0 auto;display:inline-flex;align-items:center;gap:6px;height:36px;padding:0 12px;border-radius:9px;border:1px solid var(--line);background:var(--surface);color:var(--fg);font:600 14px var(--sans);cursor:pointer}
.langbtn:hover{border-color:#3A4D6B}
.langbtn b{font-weight:700;color:var(--accent)}
.menubtn{display:none;margin-left:auto;height:36px;width:40px;border-radius:9px;border:1px solid var(--line);background:var(--surface);color:var(--fg);cursor:pointer;align-items:center;justify-content:center}
@media (max-width:900px){
  .nav ul{display:none;position:absolute;left:0;right:0;top:64px;flex-direction:column;background:#0C121C;border-bottom:1px solid var(--line);padding:10px 16px 16px}
  .nav.open ul{display:flex}
  .menubtn{display:inline-flex}
  .langbtn{margin-left:0}
}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;height:50px;padding:0 22px;border-radius:12px;background:var(--accent-strong);color:#fff;font-weight:700;font-size:16px;text-decoration:none;border:1px solid var(--accent-strong);transition:background .15s,border-color .15s}
.btn:hover{background:#3D7BF0;color:#fff}
.btn.ghost{background:transparent;border-color:var(--line);color:var(--fg)}
.btn.ghost:hover{border-color:#3A4D6B;background:var(--surface)}
.btn svg{width:20px;height:20px;flex:0 0 auto}
.btn.sm{height:42px;font-size:15px;padding:0 16px;border-radius:10px}

.hero{position:relative;overflow:hidden;padding:72px 0 80px}
.hero::before{content:"";position:absolute;width:900px;height:900px;left:-300px;top:-460px;background:radial-gradient(circle,rgba(79,139,255,.22),rgba(79,139,255,0) 62%);pointer-events:none}
.hero::after{content:"";position:absolute;width:800px;height:800px;right:-320px;bottom:-460px;background:radial-gradient(circle,rgba(52,211,153,.10),rgba(52,211,153,0) 60%);pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;color:#A9C4FF;background:var(--accent-soft);border:1px solid rgba(79,139,255,.35);padding:6px 12px;border-radius:999px;margin-bottom:22px}
.hero h1 em,.h2em{font-style:normal;color:var(--accent)}
.hero .lead{font-size:19px;color:var(--muted);max-width:560px}
.ctas{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 18px}
.trust{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--dim);font-size:14px;margin:0;padding:0;list-style:none}
.trust li{display:flex;align-items:center;gap:8px}
.trust li::before{content:"";width:6px;height:6px;border-radius:50%;background:var(--ok)}
@media (max-width:960px){.hero .wrap{grid-template-columns:minmax(0,1fr)}.hero{padding:44px 0 56px}}

.mock{position:relative;border-radius:18px;background:var(--surface);border:1px solid var(--line);box-shadow:0 30px 80px rgba(0,0,0,.5);overflow:hidden}
.mock .tb{height:40px;display:flex;align-items:center;gap:8px;padding:0 14px;background:var(--surface2);border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.mock .tb i{width:10px;height:10px;border-radius:50%;background:#3A4A61}
.mock .tb span{margin-left:6px}
.screen{position:relative;aspect-ratio:16/10;background:radial-gradient(circle at 30% 20%,#2D4A78,#16243A 70%)}
.screen .dw{position:absolute;background:#EEF2F7;border-radius:7px;box-shadow:0 10px 24px rgba(0,0,0,.35);overflow:hidden}
.screen .dw::before{content:"";display:block;height:18px;background:#D7DEE8}
.screen .ln{height:7px;border-radius:4px;background:#C3CCD8;margin:9px 12px 0}
.tbar{position:absolute;left:50%;top:0;transform:translateX(-50%);display:flex;align-items:center;gap:6px;padding:6px 10px;background:rgba(17,24,36,.94);border-radius:0 0 10px 10px;font-size:11.5px;white-space:nowrap;max-width:96%;overflow:hidden}
.tbar .st{font-family:var(--mono);color:#B5C2D3}
.tbar .b{padding:3px 7px;border-radius:6px;border:1px solid var(--line);color:var(--fg)}
.tbar .b.x{background:#C93A3A;border-color:#C93A3A;color:#fff}
.dot{display:inline-block;width:9px;height:9px;border-radius:50%;background:var(--ok);flex:0 0 auto}
.qbadge{position:absolute;left:14px;bottom:14px;display:flex;align-items:center;gap:8px;padding:8px 12px;border-radius:10px;background:rgba(17,24,36,.95);border:1px solid var(--line);font-size:12.5px;font-weight:600;white-space:nowrap}
.traycard{position:absolute;right:-6px;bottom:-26px;width:min(300px,62%);background:#151D2A;border:1px solid var(--line);border-radius:14px;box-shadow:0 24px 60px rgba(0,0,0,.6);padding:8px 0;font-size:13.5px}
.traycard .r{display:flex;justify-content:space-between;align-items:center;padding:7px 16px;gap:10px}
.traycard .r .k{color:var(--muted)}
.traycard .r .v{font-family:var(--mono);font-size:13px}
.traycard hr{border:0;border-top:1px solid var(--line);margin:6px 0}
.herovis{position:relative;padding-bottom:30px}

section{padding:84px 0;scroll-margin-top:64px}
.sec-head{max-width:760px;margin-bottom:40px}
.sec-head p{color:var(--muted);font-size:18px}
.kicker{font-size:13px;font-weight:700;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.alt{background:var(--bg2);border-top:1px solid #152033;border-bottom:1px solid #152033}

.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
@media (max-width:960px){.g3{grid-template-columns:repeat(2,1fr)}}
@media (max-width:640px){.g3,.g2{grid-template-columns:1fr}}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.card p{color:var(--muted);margin:0;font-size:15.5px}
.card .ic{width:44px;height:44px;border-radius:12px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card .ic svg{width:24px;height:24px;stroke:#8FB4FF;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round}
.card.wide{grid-column:span 2}
@media (max-width:640px){.card.wide{grid-column:auto}}
.card.feature-hero{background:linear-gradient(180deg,rgba(79,139,255,.10),rgba(79,139,255,0) 70%),var(--surface)}

.flow{display:grid;grid-template-columns:1fr auto 1fr;gap:0;align-items:stretch}
.node{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.node h3{display:flex;align-items:center;gap:10px}
.node ul{margin:0;padding-left:18px;color:var(--muted);font-size:15.5px}
.node .tag{font-size:12px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--dim)}
.link{display:flex;flex-direction:column;justify-content:center;gap:14px;padding:0 18px;min-width:230px}
.pipe{position:relative;padding:10px 12px;border-radius:12px;border:1px dashed #33476A;font-size:13.5px;color:var(--muted);text-align:center;background:rgba(13,20,32,.8)}
.pipe b{display:block;color:var(--fg);font-size:14px;margin-bottom:2px}
.pipe.media{border:1px solid rgba(79,139,255,.55);background:rgba(79,139,255,.08)}
.pipe::after{content:"";position:absolute;right:-7px;top:50%;margin-top:-6px;border:6px solid transparent;border-left-color:#33476A;border-right:0}
.pipe.media::after{border-left-color:var(--accent)}
.pipe.media::before{content:"";position:absolute;left:-7px;top:50%;margin-top:-6px;border:6px solid transparent;border-right-color:var(--accent);border-left:0}
.cloudrow{margin-top:18px;display:flex;justify-content:center}
.cloudrow .node{max-width:620px;border-style:dashed;text-align:center}
@media (max-width:860px){.flow{grid-template-columns:minmax(0,1fr)}.link{padding:14px 0;min-width:0}.pipe::after,.pipe.media::before{display:none}}

.steps3{counter-reset:s;display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:28px}
.steps3 li{list-style:none;counter-increment:s;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px 20px 20px 66px;position:relative;color:var(--muted);font-size:15.5px}
.steps3 li::before{content:counter(s);position:absolute;left:20px;top:20px;width:32px;height:32px;border-radius:9px;background:var(--accent-strong);color:#fff;font-weight:700;display:flex;align-items:center;justify-content:center}
.steps3 li b{display:block;color:var(--fg);font-size:16.5px;margin-bottom:4px}
.steps3{padding:0;margin-bottom:0}
@media (max-width:860px){.steps3{grid-template-columns:1fr}}

.tablewrap{overflow-x:auto;border:1px solid var(--line);border-radius:var(--r);background:var(--surface)}
table{width:100%;border-collapse:collapse;font-size:15px}
th,td{padding:13px 16px;text-align:left;vertical-align:top;border-bottom:1px solid var(--line)}
thead th{font-size:13px;color:var(--dim);text-transform:uppercase;letter-spacing:.06em;font-weight:700;background:var(--surface2);white-space:nowrap}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody th{font-weight:600;color:var(--fg);white-space:nowrap}
td{color:var(--muted)}
.cmp td.us,.cmp th.us{background:rgba(79,139,255,.07)}
.cmp thead th.us{color:#BFD3FF}
.y{color:var(--ok);font-weight:600}
.n{color:#F3A3A3;font-weight:600}
.m{color:#F6D27A;font-weight:600}
.note{font-size:14px;color:var(--dim);margin-top:14px}

.videos{display:grid;grid-template-columns:1fr 1fr;gap:22px}
@media (max-width:860px){.videos{grid-template-columns:1fr}}
.vcard{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.vcard video{display:block;width:100%;height:auto;aspect-ratio:16/9;background:#000}
.vcard .meta{padding:16px 20px}
.vcard .meta h3{margin:0 0 4px}
.vcard .meta p{margin:0;color:var(--muted);font-size:15px}

.dlgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
@media (max-width:960px){.dlgrid{grid-template-columns:1fr}}
.dl{display:flex;flex-direction:column;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:24px}
.dl .os{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.dl .os svg{width:34px;height:34px;flex:0 0 auto}
.dl .os h3{margin:0}
.dl .os small{display:block;color:var(--dim);font-size:13px;font-weight:500}
.dl ol{color:var(--muted);font-size:15px;padding-left:20px;margin:6px 0 18px;flex:1}
.dl ol li{margin-bottom:6px}
.dl .btn{width:100%}
.dl .fn{font-family:var(--mono);font-size:12.5px;color:var(--dim);margin-top:10px;text-align:center;overflow-wrap:anywhere}
.oneliner{margin-top:22px;display:grid;grid-template-columns:minmax(0,1fr) auto;gap:12px;align-items:center;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px}
.oneliner pre{border-radius:10px}
.copy{height:42px;padding:0 16px;border-radius:10px;border:1px solid var(--line);background:var(--surface2);color:var(--fg);font:600 14px var(--sans);cursor:pointer}
.copy:hover{border-color:#3A4D6B}
@media (max-width:640px){.oneliner{grid-template-columns:minmax(0,1fr)}}
.otherdl{margin-top:16px;color:var(--muted);font-size:15px}

.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;margin-bottom:10px}
.faq summary{cursor:pointer;list-style:none;padding:16px 50px 16px 20px;font-weight:600;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:20px;top:12px;font-size:24px;color:var(--accent);font-weight:400}
.faq details[open] summary::after{content:"−"}
.faq details > div{padding:0 20px 18px;color:var(--muted);font-size:15.5px}
.faq details > div p:last-child{margin:0}

.callout{border-radius:14px;padding:16px 18px;border:1px solid rgba(79,139,255,.45);background:rgba(79,139,255,.08);color:#D3E1FF;font-size:15.5px;margin:18px 0}
.callout.warn{border-color:rgba(251,191,36,.5);background:rgba(251,191,36,.08);color:#F6E3B0}
.callout b{color:#fff}

.cta-band{text-align:center}
.cta-band .ctas{justify-content:center}

footer{border-top:1px solid #152033;padding:40px 0 48px;color:var(--dim);font-size:14.5px}
footer .wrap{display:flex;flex-wrap:wrap;gap:18px 32px;align-items:center;justify-content:space-between}
footer nav{display:flex;flex-wrap:wrap;gap:6px 20px}
footer a{color:var(--muted);text-decoration:none}
footer a:hover{color:var(--fg)}

.doc{display:grid;grid-template-columns:240px minmax(0,1fr);gap:48px;padding:48px 20px 80px}
.toc{position:sticky;top:84px;align-self:start;font-size:14.5px}
.toc p{font-size:12px;letter-spacing:.1em;text-transform:uppercase;color:var(--dim);font-weight:700;margin-bottom:10px}
.toc ol{list-style:none;margin:0;padding:0;border-left:1px solid var(--line)}
.toc a{display:block;padding:5px 0 5px 14px;color:var(--muted);text-decoration:none;margin-left:-1px;border-left:2px solid transparent}
.toc a:hover{color:var(--fg);border-left-color:var(--accent)}
.prose h2{font-size:clamp(26px,3.4vw,34px);margin-top:56px;padding-top:8px;scroll-margin-top:80px}
.prose h2:first-of-type{margin-top:12px}
.prose h3{margin-top:30px;scroll-margin-top:80px}
.prose p,.prose li{color:#C4CFDD}
.prose ul,.prose ol{padding-left:22px}
.prose li{margin-bottom:6px}
.prose .tablewrap{margin:16px 0 22px}
.prose pre{margin:12px 0 18px}
.pagehead{padding:56px 0 8px}
.pagehead p{color:var(--muted);font-size:18px;max-width:760px}
@media (max-width:900px){.doc{grid-template-columns:minmax(0,1fr);gap:12px;padding-top:24px}.toc{position:static;border:1px solid var(--line);border-radius:14px;padding:16px 18px;background:var(--surface)}}
.vcard .meta .vnote{margin-top:8px;font-size:13.5px;color:var(--dim);font-style:italic}
.soon{margin:22px 0 0;color:var(--muted);font-size:15.5px}
.soon b{color:var(--fg)}
.whatsnew{margin-top:26px;background:var(--surface);border:1px solid rgba(79,139,255,.45);border-radius:var(--r);padding:22px 24px}
.whatsnew h3{margin:0 0 10px}
.whatsnew ul{margin:0;padding-left:20px;color:var(--muted);font-size:15.5px}
.whatsnew li{margin-bottom:6px}