:root{--bg:#F6F7FA;--surface:#fff;--ink:#0E1630;--muted:#505B76;--line:#DDE2EC;--accent:#2F5BFF;--accent-ink:#fff;--ok:#12B886;--hero:#0A1022;--hero-ink:#EEF1FA;--hero-muted:#9AA6C4;--hero-line:#222C4A;--card:#111A33;box-sizing:border-box;padding-top:env(safe-area-inset-top,0px);padding-bottom:env(safe-area-inset-bottom,0px)}
@media (prefers-color-scheme:dark){:root:not([data-theme="light"]){--bg:#0B1226;--surface:#131C36;--ink:#E8ECF6;--muted:#A3AEC6;--line:#253050;--accent:#7C9BFF;--accent-ink:#0B1226}}
:root[data-theme="dark"]{--bg:#0B1226;--surface:#131C36;--ink:#E8ECF6;--muted:#A3AEC6;--line:#253050;--accent:#7C9BFF;--accent-ink:#0B1226}
html[lang="vi"] .en,html[lang="en"] .vi{display:none}
html{scroll-padding-top:72px;scroll-behavior:smooth}*{box-sizing:border-box}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;line-height:1.65;font-size:17px}
a{color:inherit}:focus-visible{outline:3px solid var(--accent);outline-offset:3px}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px}
.btn{display:inline-block;background:var(--accent);color:var(--accent-ink);padding:13px 24px;border-radius:9px;font-weight:600;text-decoration:none;font-size:16px;border:0;cursor:pointer;font-family:inherit}
.btn.ghost{background:transparent;color:inherit;border:1.5px solid currentColor;opacity:.9}
.top{background:var(--hero);color:var(--hero-ink);position:relative;overflow:hidden}
.top::before{content:"";position:absolute;inset:0;background-image:linear-gradient(var(--hero-line) 1px,transparent 1px),linear-gradient(90deg,var(--hero-line) 1px,transparent 1px);background-size:56px 56px;opacity:.45;-webkit-mask-image:radial-gradient(ellipse at 70% 30%,#000,transparent 70%);mask-image:radial-gradient(ellipse at 70% 30%,#000,transparent 70%)}
.top .wrap{position:relative}
header{display:flex;justify-content:space-between;align-items:center;padding:20px 0}
.logo{font-weight:800;font-size:21px;letter-spacing:-.02em;text-decoration:none;display:flex;align-items:center;gap:10px}
.lm{width:30px;height:30px;flex:none}.top .lm .f{fill:#6F92FF}.flogo .lm .f{fill:var(--accent)}
nav{display:flex;gap:26px;align-items:center;font-size:15px;font-weight:500}
nav a:not(.btn){color:var(--hero-muted);text-decoration:none}nav a:not(.btn):hover{color:#fff}
nav .btn{padding:9px 18px;font-size:15px;background:#fff;color:#0A1022}
.lang{font:inherit;font-size:13px;font-weight:600;background:transparent;color:var(--hero-ink);border:1px solid var(--hero-line);border-radius:7px;padding:6px 11px;cursor:pointer}
.hero{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:56px 0 80px}
.phero{padding:48px 0 72px;max-width:820px}.phero h1{font-size:clamp(32px,4.6vw,52px)}
.crumb{font-size:14px;color:var(--hero-muted);margin-bottom:18px}.crumb a{text-decoration:none}.crumb a:hover{color:#fff}
.eyebrow{display:inline-block;font-size:13px;font-weight:600;letter-spacing:.06em;text-transform:uppercase;color:#9DB4FF;border:1px solid var(--hero-line);border-radius:99px;padding:5px 14px;margin-bottom:22px}
h1{font-size:clamp(34px,5vw,58px);line-height:1.08;letter-spacing:-.035em;font-weight:800;margin:0 0 22px}
.lead{font-size:19px;color:var(--hero-muted);max-width:52ch;margin:0 0 30px}
.actions{display:flex;gap:12px;flex-wrap:wrap}
.card{background:var(--card);border:1px solid var(--hero-line);border-radius:16px;overflow:hidden;box-shadow:0 30px 80px #0008}
.bar{display:flex;gap:7px;align-items:center;padding:13px 16px;border-bottom:1px solid var(--hero-line);font:12px ui-monospace,Menlo,Consolas,monospace;color:var(--hero-muted)}
.bar s{width:10px;height:10px;border-radius:50%;background:#2C3860;text-decoration:none}.bar span{margin-left:8px}
.step{display:grid;grid-template-columns:28px 1fr auto;gap:12px;align-items:center;padding:15px 18px;border-bottom:1px solid var(--hero-line);animation:in .7s both}
.step:nth-of-type(2){animation-delay:.1s}.step:nth-of-type(3){animation-delay:.25s}.step:nth-of-type(4){animation-delay:.4s}.step:nth-of-type(5){animation-delay:.55s}
.dot{width:22px;height:22px;border-radius:50%;border:2px solid #3A4772;display:grid;place-items:center;font-size:12px;color:#0A1022;font-weight:700}
.dot.n{background:#7C9BFF;border-color:#7C9BFF}
.done .dot{background:var(--ok);border-color:var(--ok)}.run .dot{border-color:#7C9BFF;box-shadow:0 0 0 4px #7C9BFF33}
.step b{display:block;font-size:15px;font-weight:600}.step small{color:var(--hero-muted);font-size:13px}
.tag{font:12px ui-monospace,Menlo,Consolas,monospace;color:var(--hero-muted)}.done .tag{color:var(--ok)}.run .tag{color:#9DB4FF}
.note{padding:11px 18px;font-size:12px;color:var(--hero-muted)}
@keyframes in{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
.strip{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;padding:30px 0;font-size:15px;font-weight:600}
.strip div{padding-left:14px;border-left:3px solid var(--accent)}
section{padding:80px 0}.alt{background:var(--surface)}
h2{font-size:clamp(26px,3.4vw,38px);line-height:1.15;letter-spacing:-.028em;margin:0 0 14px;font-weight:800;max-width:26ch}
.intro{color:var(--muted);max-width:62ch;margin:0 0 40px}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.sol{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:26px;display:block;text-decoration:none}
.alt .sol{background:var(--bg)}
a.sol:hover{border-color:var(--accent);transform:translateY(-2px);transition:.2s}
.sol em{font:600 13px ui-monospace,Menlo,Consolas,monospace;font-style:normal;color:var(--accent)}
.sol h3{margin:10px 0 8px;font-size:19px;line-height:1.3}.sol p{margin:0;color:var(--muted);font-size:16px}
.more{display:inline-block;margin-top:14px;font-weight:600;font-size:15px;color:var(--accent)}
.flow{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:20px;counter-reset:s}
.flow li{counter-increment:s;border-top:3px solid var(--accent);padding-top:20px}
.flow li::before{content:"0" counter(s);font:600 13px ui-monospace,Menlo,Consolas,monospace;color:var(--accent);display:block;margin-bottom:6px}
.flow h3{margin:0 0 8px;font-size:19px}.flow p{margin:0;color:var(--muted);font-size:16px}
.stage{display:grid;grid-template-columns:90px 1fr;gap:24px;padding:36px 0;border-top:1px solid var(--line)}.stage:last-child{border-bottom:1px solid var(--line)}
.sn{font:700 40px ui-monospace,Menlo,Consolas,monospace;color:var(--accent)}
.stage h3{margin:0 0 8px;font-size:24px}.stage p{margin:0 0 18px;color:var(--muted);max-width:64ch}
.meta{display:grid;grid-template-columns:1fr 1fr;gap:16px}.meta div{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:15px;font-weight:500}
.meta small{display:block;color:var(--accent);font:600 12px ui-monospace,Menlo,Consolas,monospace;margin-bottom:4px;text-transform:uppercase}
.sec{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}
.sec ul{list-style:none;margin:0;padding:0}
.sec ul>li{padding:16px 0 16px 38px;border-top:1px solid var(--line);position:relative}.sec ul>li:last-child{border-bottom:1px solid var(--line)}
.sec ul>li::before{content:"✓";position:absolute;left:0;top:15px;width:24px;height:24px;border-radius:50%;background:var(--ok);color:#fff;font-size:13px;display:grid;place-items:center}
ul.plain{list-style:none;margin:12px 0 0;padding:0}ul.plain li{padding:8px 0 8px 20px;position:relative;color:var(--muted);font-size:16px}ul.plain li::before{content:"";position:absolute;left:0;top:18px;width:8px;height:8px;border-radius:50%;background:var(--accent)}
details{border-top:1px solid var(--line);padding:20px 0}details:last-of-type{border-bottom:1px solid var(--line)}
summary{cursor:pointer;font-weight:600;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
summary::after{content:"+";color:var(--accent);font-size:24px;line-height:1}details[open] summary::after{content:"−"}
details p{margin:12px 0 0;color:var(--muted);max-width:70ch}
form{display:grid;gap:18px}label{display:grid;gap:6px;font-weight:600;font-size:15px}
input,textarea{font:inherit;font-weight:400;padding:12px 14px;border:1.5px solid var(--line);border-radius:9px;background:var(--surface);color:var(--ink);width:100%}
.cta{background:var(--hero);color:var(--hero-ink);border-radius:22px;padding:56px 48px}
.cta h2{max-width:22ch}.cta p{color:var(--hero-muted);max-width:56ch;margin:0 0 28px}.cta .btn{background:#fff;color:#0A1022}
.foot{border-top:1px solid var(--line);background:var(--surface);padding:48px 0 0;color:var(--muted);font-size:15px}
.fgrid{display:grid;grid-template-columns:1.4fr 1.2fr 1fr 1.2fr;gap:32px}
.fgrid h4{margin:0 0 12px;color:var(--ink);font-size:14px}.fgrid a{display:block;text-decoration:none;padding:3px 0}.fgrid a:hover{color:var(--accent)}
.flogo{color:var(--ink);font-size:21px}.fgrid p{margin:8px 0 0;max-width:30ch}
.copy{padding:32px 24px;margin-top:32px;border-top:1px solid var(--line)}
@media (max-width:860px){header{flex-wrap:wrap;gap:10px}nav{width:100%;justify-content:space-between;gap:12px;font-size:14px}nav .btn{display:none}
.hero{grid-template-columns:1fr;padding:28px 0 56px}.strip{grid-template-columns:1fr 1fr}.grid{grid-template-columns:1fr}.flow{grid-template-columns:1fr 1fr}.sec{grid-template-columns:1fr;gap:24px}.cta{padding:40px 24px}section{padding:56px 0}.stage{grid-template-columns:1fr;gap:8px}.meta{grid-template-columns:1fr}.fgrid{grid-template-columns:1fr 1fr}.phero{padding:24px 0 48px}}
@media (prefers-reduced-motion:reduce){.step{animation:none}html{scroll-behavior:auto}}
.two{display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:start}.two2{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin-bottom:22px}
.blk h3{font:600 13px ui-monospace,Menlo,Consolas,monospace;text-transform:uppercase;letter-spacing:.04em;color:var(--accent);margin:0 0 10px}
.blk ul{list-style:none;margin:0 0 26px;padding:0}.blk li{padding:7px 0 7px 20px;position:relative;color:var(--muted)}
.blk li::before{content:"";position:absolute;left:0;top:17px;width:8px;height:8px;border-radius:50%;background:var(--accent)}.blk li a{color:var(--ink)}
.chips{display:flex;flex-wrap:wrap;gap:8px}.chips span{border:1px solid var(--line);background:var(--surface);border-radius:99px;padding:5px 14px;font-size:14px;font-weight:500}
.callout{border-left:3px solid var(--ok);background:var(--surface);padding:14px 18px;border-radius:0;font-weight:500}.callout small{display:block;color:var(--ok);font:600 12px ui-monospace,Menlo,Consolas,monospace;text-transform:uppercase;margin-bottom:4px}
.tbl{width:100%;border-collapse:collapse;font-size:15px}.tbl th,.tbl td{padding:14px 16px;border-top:1px solid var(--line);text-align:left;vertical-align:top}.tbl th{font-weight:600}.tbl td:first-child{font-weight:600}
.steps{margin:0;padding:0;list-style:none;counter-reset:g}.steps li{counter-increment:g;padding:16px 0 16px 52px;border-top:1px solid var(--line);position:relative}.steps li:last-child{border-bottom:1px solid var(--line)}
.steps li::before{content:counter(g);position:absolute;left:0;top:14px;width:32px;height:32px;border-radius:50%;background:var(--accent);color:var(--accent-ink);display:grid;place-items:center;font-weight:700;font-size:14px}
.calc{background:var(--surface);border:1px solid var(--line);border-radius:16px;padding:26px}
.tiles{display:grid;grid-template-columns:1fr 1fr;gap:12px}.tiles div{background:var(--bg);border-radius:10px;padding:14px 16px}.tiles small{display:block;color:var(--muted);font-size:13px;line-height:1.35;margin-bottom:6px}.tiles b{font-size:22px;letter-spacing:-.01em}
.prose{max-width:760px}.prose h3{margin:28px 0 8px;font-size:19px}.prose p{margin:0;color:var(--muted)}.upd{margin-top:36px!important;font-size:14px}
[id]{scroll-margin-top:24px}
.foot{background:var(--hero);color:var(--hero-muted);border-top:1px solid var(--hero-line)}
.fgrid{grid-template-columns:1.1fr repeat(4,1fr);gap:28px}
.fgrid h4{font:500 14px "Be Vietnam Pro",system-ui,sans-serif;color:var(--hero-muted);margin:0 0 12px}.fgrid .g+.g{margin-top:28px}
.fgrid a{color:var(--hero-ink);font-size:15px;font-weight:500;padding:5px 0;line-height:1.4}.fgrid a:hover{color:#9DB4FF}
.foot .flogo{color:var(--hero-ink)}.foot .lm .f{fill:#6F92FF}.foot .fgrid p{color:var(--hero-muted)}.copy{border-top:1px solid var(--hero-line);color:var(--hero-muted)}
@media (max-width:860px){.two{grid-template-columns:1fr;gap:20px}.two2{grid-template-columns:1fr}.tiles{grid-template-columns:1fr}.fgrid{grid-template-columns:1fr 1fr}.fgrid>div:first-child{grid-column:1/-1}
nav{overflow-x:auto;white-space:nowrap;gap:16px}.grid[style*="repeat(4"]{grid-template-columns:1fr!important}.grid[style*="1fr 1fr"]{grid-template-columns:1fr!important}}