/* Up Scale – trang giới thiệu. Bộ nhận diện: xanh đậm #0B1A55, xanh #1E6BFF, tím #7B5CFF, xanh ngọc #22C7F5, chữ Be Vietnam Pro. */
:root{
  --navy:#0B1A55; --blue:#1E6BFF; --blue-2:#0A4BE0; --purple:#7B5CFF; --cyan:#22C7F5; --sky:#CFE0FF;
  --bg:#F4F7FF; --surface:#FFFFFF; --ink:#0B1A55; --muted:#51618A; --line:#DDE6FA; --soft:#EAF1FF;
  --ok:#0F8A5F; --ok-soft:#E3F6EE; --warn:#B45309; --warn-soft:#FFF4E2; --bad:#C2312F;
  --r:18px; --shadow:0 18px 50px -24px rgba(16,52,160,.35);
  --font:"Be Vietnam Pro",system-ui,-apple-system,"Segoe UI",sans-serif;
}
@media (prefers-color-scheme: dark){:root:not([data-theme="light"]){
  --bg:#070F2E; --surface:#0E1A44; --ink:#EAF0FF; --muted:#A3B2DA; --line:#1E2C5E; --soft:#13225A;
  --ok:#38D39F; --ok-soft:#0F3528; --warn:#FBBF5A; --warn-soft:#3A2A10; --bad:#FF7B78; --shadow:0 18px 50px -24px rgba(0,0,0,.6); color-scheme:dark}}
:root[data-theme="dark"]{
  --bg:#070F2E; --surface:#0E1A44; --ink:#EAF0FF; --muted:#A3B2DA; --line:#1E2C5E; --soft:#13225A;
  --ok:#38D39F; --ok-soft:#0F3528; --warn:#FBBF5A; --warn-soft:#3A2A10; --bad:#FF7B78; --shadow:0 18px 50px -24px rgba(0,0,0,.6); color-scheme:dark}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font:400 16px/1.65 var(--font);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:var(--blue)}
img{max-width:100%}
h1,h2,h3{line-height:1.15;margin:0;text-wrap:balance;letter-spacing:-.01em}
p{margin:0}
.wrap{max-width:1180px;margin:0 auto;padding-left:max(16px,env(safe-area-inset-left,0px));padding-right:max(16px,env(safe-area-inset-right,0px))}
:focus-visible{outline:3px solid var(--blue);outline-offset:3px;border-radius:8px}
.grad{background:linear-gradient(90deg,var(--blue),var(--purple));-webkit-background-clip:text;background-clip:text;color:transparent}

/* Thanh trên */
.top{position:sticky;top:0;z-index:20;background:color-mix(in srgb,var(--bg) 86%,transparent);backdrop-filter:blur(12px);border-bottom:1px solid color-mix(in srgb,var(--line) 70%,transparent)}
.top .wrap{display:flex;align-items:center;gap:20px;height:68px}
.brand{display:flex;align-items:center;gap:10px;text-decoration:none;color:var(--ink);font-weight:800;font-size:20px;letter-spacing:-.02em}
.brand img{width:36px;height:36px}
.nav{display:flex;gap:4px;margin-left:auto;align-items:center}
.nav a{color:var(--muted);text-decoration:none;font-weight:500;font-size:15px;padding:8px 12px;border-radius:10px}
.nav a:hover{color:var(--ink);background:var(--soft)}
.nav .btn{margin-left:6px}
@media (max-width:860px){.nav a:not(.btn){display:none}}
.nav a.btn-primary,.nav a.btn-primary:hover{color:#fff;background:linear-gradient(135deg,#2A86FF,var(--blue-2))}
.nav a.btn-ghost{color:var(--blue)}
.brand{white-space:nowrap}
@media (max-width:520px){.nav a.btn-ghost{display:none}}

/* Nút */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:46px;padding:0 20px;border-radius:999px;font:600 15px/1 var(--font);text-decoration:none;border:1.5px solid transparent;cursor:pointer;transition:transform .15s,box-shadow .15s;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,#2A86FF,var(--blue-2));color:#fff;box-shadow:0 10px 24px -12px rgba(30,107,255,.8)}
.btn-primary:hover{box-shadow:0 14px 30px -12px rgba(30,107,255,.9)}
.btn-ghost{background:var(--surface);color:var(--blue);border-color:color-mix(in srgb,var(--blue) 45%,transparent)}
.btn-ghost:hover{background:var(--soft)}
.btn-sm{min-height:38px;padding:0 16px;font-size:14px}
.btn[aria-disabled="true"]{opacity:.55;pointer-events:none}

/* Hero */
.hero{position:relative;padding:64px 0 40px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:-30% -10% auto 40%;height:620px;background:radial-gradient(closest-side,rgba(34,199,245,.22),transparent),radial-gradient(closest-side at 70% 60%,rgba(123,92,255,.18),transparent);pointer-events:none}
.hero .wrap{position:relative;display:grid;grid-template-columns:1.05fr 1fr;gap:48px;align-items:center}
@media (max-width:960px){.hero .wrap{grid-template-columns:1fr}.hero{padding-top:36px}}
.tagline{display:inline-flex;align-items:center;gap:8px;font-weight:600;font-size:14px;color:var(--blue);background:var(--surface);border:1px solid var(--line);border-radius:999px;padding:6px 14px 6px 8px}
.tagline img{width:22px;height:22px}
.hero h1{font-size:clamp(34px,5.2vw,58px);font-weight:800;margin:18px 0 18px}
.hero .lead{font-size:18px;color:var(--muted);max-width:560px}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin:28px 0 18px}
.points{display:flex;flex-wrap:wrap;gap:8px 18px;color:var(--muted);font-size:14px;list-style:none;padding:0;margin:0}
.points li::before{content:"✓";display:inline-grid;place-items:center;width:18px;height:18px;margin-right:6px;border-radius:50%;background:var(--blue);color:#fff;font-size:11px;font-weight:700}

/* Ảnh minh họa giao diện */
.shot{background:var(--surface);border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);overflow:hidden}
.shot-top{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}
.shot-top b{color:var(--ink);font-weight:700;display:flex;align-items:center;gap:8px}
.shot-top img{width:22px;height:22px}
.shot-top .demo{margin-left:auto;font-size:12px}
.kpis{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:16px}
.kpi{background:var(--bg);border:1px solid var(--line);border-radius:14px;padding:12px}
.kpi b{display:block;font-size:20px;font-weight:800}
.kpi span{font-size:12px;color:var(--muted)}
.kpi .up{color:var(--ok);font-weight:700;font-size:12px}
@media (max-width:520px){.kpis{grid-template-columns:repeat(2,1fr)}}
.conv{display:grid;grid-template-columns:200px 1fr;border-top:1px solid var(--line)}
@media (max-width:620px){.conv{grid-template-columns:1fr}.conv .list{display:none}}
.list{border-right:1px solid var(--line);padding:8px}
.row{display:flex;gap:10px;padding:8px;border-radius:12px;align-items:center}
.row.sel{background:var(--soft)}
.av{position:relative;flex:none;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;color:#fff;font-weight:700;font-size:14px}
.av i{position:absolute;right:-3px;bottom:-3px;width:15px;height:15px;border-radius:50%;border:2px solid var(--surface);font:700 8px/11px var(--font);font-style:normal;text-align:center;color:#fff}
.row b{display:block;font-size:13px}
.row small{display:block;font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:130px}
.chat{padding:14px;display:flex;flex-direction:column;gap:8px}
.bub{max-width:85%;padding:9px 13px;border-radius:16px;font-size:13.5px;line-height:1.45}
.bub.in{background:var(--bg);border:1px solid var(--line);align-self:flex-start;border-bottom-left-radius:6px}
.bub.out{background:linear-gradient(135deg,#2A86FF,var(--blue-2));color:#fff;align-self:flex-end;border-bottom-right-radius:6px}
.order{align-self:flex-end;width:min(270px,90%);border:1px solid var(--line);border-radius:14px;padding:10px 12px;font-size:12.5px;background:var(--surface)}
.order .l{display:flex;justify-content:space-between;padding:2px 0}
.order .t{border-top:1px dashed var(--line);margin-top:4px;padding-top:6px;font-weight:700}
.paid{display:inline-block;margin-top:6px;background:var(--ok-soft);color:var(--ok);font-weight:700;border-radius:999px;padding:3px 10px;font-size:12px}

/* Mục */
section{padding:72px 0}
.head{max-width:720px;margin:0 0 36px}
.head.c{margin-inline:auto;text-align:center}
.eyebrow{font-weight:700;font-size:13px;letter-spacing:.08em;text-transform:uppercase;color:var(--blue)}
.head h2{font-size:clamp(28px,3.6vw,40px);font-weight:800;margin:10px 0 12px}
.head p{color:var(--muted);font-size:17px}

/* Hệ sinh thái */
.eco{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px}
.mod{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:20px 16px;text-align:center;transition:transform .2s,box-shadow .2s}
.mod:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.mod .ic{width:56px;height:56px;margin:0 auto 12px;border-radius:16px;display:grid;place-items:center;background:linear-gradient(135deg,#3B95FF,var(--blue-2));color:#fff;box-shadow:0 10px 22px -12px rgba(30,107,255,.9)}
.mod .ic svg{width:28px;height:28px}
.mod h3{font-size:16px;font-weight:700}
.mod p{font-size:13.5px;color:var(--muted);margin-top:4px}

/* Tính năng */
.feats{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
@media (max-width:900px){.feats{grid-template-columns:1fr 1fr}}
@media (max-width:600px){.feats{grid-template-columns:1fr}}
.feat{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.feat .tag{display:inline-block;font-weight:700;font-size:11.5px;letter-spacing:.06em;color:var(--purple);background:color-mix(in srgb,var(--purple) 12%,transparent);border-radius:999px;padding:3px 10px;margin-bottom:12px}
.feat h3{font-size:18px;font-weight:700;margin-bottom:6px}
.feat p{color:var(--muted);font-size:15px}

/* Dải tối */
.band{background:radial-gradient(120% 140% at 85% 10%,#1E4FE0 0%,#0D2A9E 40%,var(--navy) 80%);color:#EAF0FF;border-radius:28px;margin:0 max(16px,env(safe-area-inset-left,0px));padding:56px 0}
.band .head h2{color:#fff}.band .head p{color:#B9C8F2}.band .eyebrow{color:#7FD9FF}
.steps{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,1fr);gap:14px;counter-reset:s}
@media (max-width:900px){.steps{grid-template-columns:1fr 1fr}}
@media (max-width:520px){.steps{grid-template-columns:1fr}}
.steps li{counter-increment:s;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:16px;padding:18px}
.steps li::before{content:counter(s);display:grid;place-items:center;width:32px;height:32px;border-radius:50%;background:linear-gradient(135deg,var(--cyan),var(--blue));font-weight:800;margin-bottom:10px;color:#fff}
.steps h3{font-size:16px;color:#fff;margin-bottom:4px}
.steps p{font-size:14px;color:#B9C8F2}

/* An toàn */
.safe{display:grid;grid-template-columns:1fr 1.3fr;gap:40px;align-items:start}
@media (max-width:900px){.safe{grid-template-columns:1fr}}
.safe dl{margin:0;display:grid;gap:12px}
.safe dl div{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px}
.safe dt{font-weight:700}
.safe dd{margin:4px 0 0;color:var(--muted);font-size:15px}

/* Bảng giá */
.plans{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;align-items:stretch}
@media (max-width:1000px){.plans{grid-template-columns:1fr 1fr}}
@media (max-width:560px){.plans{grid-template-columns:1fr}}
.plan{background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:24px;display:flex;flex-direction:column;gap:14px;position:relative}
.plan.hot{border:2px solid var(--blue);box-shadow:var(--shadow)}
.plan .badge{position:absolute;top:-12px;left:24px;background:linear-gradient(90deg,var(--blue),var(--purple));color:#fff;font-size:12px;font-weight:700;border-radius:999px;padding:4px 12px}
.plan h3{font-size:18px;font-weight:700}
.plan .price{font-size:30px;font-weight:800;letter-spacing:-.02em}
.plan .price small{font-size:14px;font-weight:500;color:var(--muted)}
.plan ul{list-style:none;padding:0;margin:0;display:grid;gap:8px;font-size:14.5px;color:var(--muted);flex:1}
.plan li::before{content:"✓";color:var(--blue);font-weight:800;margin-right:8px}
.note{font-size:14px;color:var(--muted);margin-top:18px;text-align:center}

/* Hỏi đáp */
.faq{max-width:820px;margin:0 auto;display:grid;gap:10px}
.faq details{background:var(--surface);border:1px solid var(--line);border-radius:14px;padding:4px 18px}
.faq summary{cursor:pointer;font-weight:600;padding:14px 0;list-style:none;display:flex;justify-content:space-between;gap:12px}
.faq summary::after{content:"+";font-size:22px;line-height:1;color:var(--blue)}
.faq details[open] summary::after{content:"–"}
.faq details p{padding:0 0 16px;color:var(--muted)}

/* Kêu gọi cuối */
.final{text-align:center}
.final .box{background:linear-gradient(135deg,#2A86FF,#1446E0 55%,#5B3FE0);border-radius:28px;color:#fff;padding:56px 24px;box-shadow:var(--shadow)}
.final h2{font-size:clamp(28px,3.6vw,40px);font-weight:800;color:#fff}
.final p{color:#DCE6FF;margin:12px auto 26px;max-width:560px;font-size:17px}
.final .btn-primary{background:#fff;color:var(--blue-2)}

/* Chân trang */
footer{background:var(--navy);color:#B9C8F2;margin-top:72px;padding:40px 0 calc(28px + env(safe-area-inset-bottom,0px))}
footer .cols{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:32px}
@media (max-width:760px){footer .cols{grid-template-columns:1fr}}
footer .brand{color:#fff}
footer h4{color:#fff;margin:0 0 10px;font-size:15px}
footer a{color:#B9C8F2;text-decoration:none;display:block;padding:3px 0;font-size:14.5px}
footer a:hover{color:#fff}
footer small{display:block;margin-top:28px;border-top:1px solid rgba(255,255,255,.12);padding-top:18px;font-size:13px}

/* Trang con (chính sách, tải về, đăng ký) */
.page{padding:48px 0 0}
.doc{max-width:820px;margin:0 auto;background:var(--surface);border:1px solid var(--line);border-radius:22px;padding:clamp(22px,4vw,44px)}
.doc h1{font-size:clamp(28px,4vw,38px);font-weight:800;margin-bottom:6px}
.doc .upd{color:var(--muted);font-size:14px;margin-bottom:22px}
.doc h2{font-size:20px;font-weight:700;margin:28px 0 8px}
.doc p,.doc li{color:var(--ink)}
.doc p+p{margin-top:10px}
.doc ul,.doc ol{padding-left:22px;margin:8px 0}
.doc li{margin:4px 0}
.callout{border-radius:14px;padding:14px 16px;margin:16px 0;font-size:15px}
.callout.info{background:var(--soft);border:1px solid var(--line)}
.callout.warn{background:var(--warn-soft);color:var(--warn)}
.callout.ok{background:var(--ok-soft);color:var(--ok)}
.step-list{counter-reset:s;list-style:none;padding:0!important}
.step-list>li{counter-increment:s;position:relative;padding:0 0 18px 50px;margin:0!important}
.step-list>li::before{content:counter(s);position:absolute;left:0;top:0;width:34px;height:34px;border-radius:50%;display:grid;place-items:center;background:linear-gradient(135deg,#2A86FF,var(--blue-2));color:#fff;font-weight:800}
.step-list b{display:block}
.dl{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin:18px 0}
.meta{color:var(--muted);font-size:14px}

/* Biểu mẫu */
form{display:grid;gap:14px}
label{display:grid;gap:6px;font-weight:600;font-size:14.5px}
label small{font-weight:400;color:var(--muted)}
input,select{font:400 16px var(--font);color:var(--ink);background:var(--surface);border:1.5px solid var(--line);border-radius:12px;min-height:48px;padding:0 14px;width:100%}
input:focus{outline:none;border-color:var(--blue);box-shadow:0 0 0 4px color-mix(in srgb,var(--blue) 18%,transparent)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:14px}
@media (max-width:560px){.two{grid-template-columns:1fr}}
.check{display:flex;gap:10px;align-items:flex-start;font-weight:400;font-size:14px;color:var(--muted)}
.check input{width:20px;min-height:20px;height:20px;margin-top:2px;flex:none}
.err{color:var(--bad);font-size:14px;min-height:1em}
.hidden{display:none!important}

/* Tự động hóa */
.autos{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.auto{background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:16px 18px;position:relative}
.auto::before{content:"";display:block;width:28px;height:4px;border-radius:2px;background:var(--purple);margin-bottom:10px}
.auto h3{font-size:15.5px;font-weight:700;margin-bottom:4px}
.auto p{color:var(--muted);font-size:14px}
@media (max-width:960px){.autos{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.autos{grid-template-columns:1fr}}
section[id]{scroll-margin-top:84px}

/* Ảnh chụp thật */
.shot.real img{display:block;width:100%;height:auto}
.shot .dots{display:flex;gap:6px;margin-right:6px}.shot .dots b{width:10px;height:10px;border-radius:50%;background:var(--line)}
.shot .dots b:nth-child(1){background:#FF6159}.shot .dots b:nth-child(2){background:#FFBD2E}.shot .dots b:nth-child(3){background:#28C941}
.tour{display:grid;grid-template-columns:240px 1fr;gap:24px;align-items:start}
.tour-tabs{display:flex;flex-direction:column;gap:4px;position:sticky;top:88px}
.tour-tabs button{font:inherit;font-size:14.5px;font-weight:600;text-align:left;color:var(--muted);background:none;border:1px solid transparent;border-radius:12px;padding:9px 14px;cursor:pointer}
.tour-tabs button:hover{background:var(--soft);color:var(--ink)}
.tour-tabs button[aria-selected=true]{background:var(--surface);color:var(--blue);border-color:var(--line);box-shadow:0 8px 20px -14px rgba(16,52,160,.45)}
.tour-p{display:grid;gap:18px}
.tour-txt h3{font-size:22px;font-weight:800;margin:0 0 6px}
.tour-txt p{color:var(--muted);margin:0 0 10px}
.tour-txt ul{margin:0;padding:0;list-style:none;display:flex;flex-wrap:wrap;gap:8px}
.tour-txt li{font-size:13.5px;background:var(--soft);border-radius:999px;padding:5px 12px}
.pos-row{display:grid;grid-template-columns:1fr 1.3fr;gap:32px;align-items:center;margin-top:56px;background:var(--surface);border:1px solid var(--line);border-radius:24px;padding:32px}
.pos-row .tour-txt ul{flex-direction:column;align-items:flex-start}
.phones{display:flex;gap:14px;justify-content:center}
.phones img{width:31%;max-width:200px;height:auto;border-radius:22px;border:6px solid #0B1A55;box-shadow:var(--shadow)}
.phones img:nth-child(2){transform:translateY(-14px)}
@media (max-width:960px){
  .tour{grid-template-columns:1fr}
  .tour-tabs{position:static;flex-direction:row;overflow-x:auto;padding-bottom:6px;scrollbar-width:none}
  .tour-tabs button{white-space:nowrap;flex:none}
  .pos-row{grid-template-columns:1fr;padding:22px}
}
.tour-p[hidden]{display:none}.tour-p figure{margin:0}
@media (max-width:560px){.shot.real .shot-top .demo{display:none}.shot.real .shot-top{white-space:nowrap;overflow:hidden}}