:root{
  --blue:#0a84ff; --blue-dark:#0662c7; --ink:#0f172a; --muted:#5b6475; --line:#e6e9f0;
  --bg:#ffffff; --soft:#f4f7fc; --card:#ffffff; --ok:#16a34a; --radius:18px;
  --shadow:0 10px 30px rgba(15,23,42,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:1120px;margin:0 auto;padding:0 20px}
section{padding:72px 0}
h1,h2,h3{line-height:1.2;margin:0 0 12px;letter-spacing:-.02em}
h1{font-size:clamp(34px,5.4vw,56px);font-weight:800}
h2{font-size:clamp(26px,3.6vw,38px);font-weight:800}
h3{font-size:19px;font-weight:700}
p{margin:0 0 12px}
.lead{font-size:clamp(17px,2vw,20px);color:var(--muted);max-width:620px}
.center{text-align:center}.center .lead{margin-left:auto;margin-right:auto;max-width:880px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}

/* Header */
header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.88);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--ink)}
.brand img{width:34px;height:34px;border-radius:9px}
.nav ul{display:flex;gap:26px;list-style:none;margin:0;padding:0}
.nav ul a{color:var(--ink);font-weight:500;font-size:15px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:12px;font-weight:700;font-size:16px;border:1.5px solid transparent;cursor:pointer;transition:transform .08s,background .15s}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff}.btn-primary:hover{background:var(--blue-dark)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-store{background:#000;color:#fff}.btn-store:hover{background:#1f2937;color:#fff}
.btn-sm{padding:9px 16px;font-size:14px;border-radius:10px}

/* Hero */
.hero{padding:32px 0 40px;background:radial-gradient(1200px 500px at 80% -10%,#dbeafe 0,transparent 60%),linear-gradient(#fff,var(--soft))}
.hero-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:center}
.hero .cta{display:flex;flex-wrap:wrap;gap:12px;margin:26px 0 14px}
.note{font-size:14px;color:var(--muted)}
.chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:22px}
.chip{background:#fff;border:1px solid var(--line);border-radius:999px;padding:6px 13px;font-size:14px;font-weight:600;color:#334155}

/* Phone mockup (dữ liệu mẫu, không phải khách thật) */
.phone{width:290px;margin:0 auto;border-radius:42px;background:#0b1220;padding:11px;box-shadow:0 30px 60px rgba(15,23,42,.28)}
.screen{background:#fff;border-radius:32px;overflow:hidden;height:560px;display:flex;flex-direction:column}
.status{display:flex;justify-content:space-between;padding:12px 20px 4px;font-size:12px;font-weight:700}
.app-title{padding:6px 16px 8px;font-weight:800;color:var(--blue);font-size:22px}
.row{display:flex;gap:10px;align-items:center;padding:10px 14px}
.av{width:40px;height:40px;border-radius:50%;flex:none;display:grid;place-items:center;color:#fff;font-weight:700;font-size:15px}
.row .t{font-size:13.5px;font-weight:700;line-height:1.2}
.row .s{font-size:12px;color:var(--muted);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:170px}
.badge{margin-left:auto;background:var(--blue);color:#fff;border-radius:999px;font-size:11px;font-weight:700;padding:2px 7px}
.chat{flex:1;background:#fff;padding:10px 12px;display:flex;flex-direction:column;gap:6px;font-size:12.5px}
.msg{max-width:78%;padding:8px 12px;border-radius:18px;background:#eef1f6}
.msg.me{align-self:flex-end;background:var(--blue);color:#fff}
.msg.ai{align-self:flex-end;background:#ecfdf3;color:#14532d;border:1px dashed #86efac}
.tabs{display:flex;justify-content:space-around;padding:8px 10px 14px;border-top:1px solid var(--line);font-size:10.5px;color:var(--muted)}
.tabs b{color:var(--blue)}
.mock-split{display:grid;gap:18px}

/* Cards / grids */
.grid{display:grid;gap:18px}
.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.card .ic{width:44px;height:44px;border-radius:12px;background:#e8f1ff;display:grid;place-items:center;font-size:22px;margin-bottom:14px}
.card p{color:var(--muted);font-size:15.5px;margin:0}
.soft{background:var(--soft)}
.stat{font-size:34px;font-weight:800;color:var(--blue)}
.steps{counter-reset:s}
.step{position:relative;padding-left:56px}
.step:before{counter-increment:s;content:counter(s);position:absolute;left:0;top:0;width:40px;height:40px;border-radius:50%;background:var(--blue);color:#fff;display:grid;place-items:center;font-weight:800}

/* Pricing */
.plan{display:flex;flex-direction:column}
.plan.pop{border:2px solid var(--blue);position:relative}
.plan.pop:before{content:"Phổ biến";position:absolute;top:-13px;left:24px;background:var(--blue);color:#fff;font-size:12px;font-weight:700;padding:3px 12px;border-radius:999px}
.price{font-size:32px;font-weight:800;margin:6px 0 2px}.price small{font-size:14px;font-weight:500;color:var(--muted)}
.plan ul{list-style:none;padding:0;margin:14px 0 20px;flex:1}
.plan li{padding:5px 0 5px 24px;position:relative;font-size:14.5px}
.plan li:before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.fine{font-size:13.5px;color:var(--muted);margin-top:18px}

/* FAQ */
details{background:#fff;border:1px solid var(--line);border-radius:14px;padding:16px 20px;margin-bottom:12px}
summary{cursor:pointer;font-weight:700;list-style:none}
summary::-webkit-details-marker{display:none}
summary:after{content:"+";float:right;font-size:22px;line-height:1;color:var(--blue)}
details[open] summary:after{content:"–"}
details p{margin:10px 0 0;color:var(--muted)}

/* CTA + footer */
.cta-band{background:linear-gradient(135deg,#0a84ff,#0b3fa8);color:#fff;border-radius:28px;padding:56px 28px;text-align:center}
.cta-band .lead{color:#dbeafe;margin:0 auto 24px}
.cta-band .btn-primary{background:#fff;color:var(--blue-dark)}
footer{padding:36px 0 50px;border-top:1px solid var(--line);color:var(--muted);font-size:14px}
.foot{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between;align-items:center}
.foot a{color:var(--muted);margin-left:18px}

@media (max-width:900px){
  .hero-grid,.g2{grid-template-columns:1fr}
  .g3,.g4{grid-template-columns:1fr 1fr}
  .nav ul{display:none}
}
@media (max-width:560px){
  section{padding:52px 0}
  .g3,.g4{grid-template-columns:1fr}
  .foot a{margin:0 14px 0 0}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}

/* Ghi chú dưới khối minh họa (dùng ở phần Tự động hóa) */
.dg-note{margin-top:30px;text-align:center;color:var(--muted);font-size:14.5px}

/* Hero và mục Ứng dụng không còn ảnh điện thoại → một cột, căn giữa */
.hero-grid.solo{grid-template-columns:1fr;text-align:center;justify-items:center}
.hero-grid.solo .lead{margin-left:auto;margin-right:auto}
.hero-grid.solo .chips{justify-content:center}
#ung-dung .hero-grid ul{display:inline-block;text-align:left}

.btn-android{background:#16a34a;color:#fff;display:inline-flex;align-items:center;gap:8px}.btn-android:hover{background:#15803d;color:#fff}
.android-box{margin-top:26px;padding:22px 22px 18px;border:1px solid var(--line,#e5e7eb);border-radius:16px;background:#f8fafc;max-width:640px}
.android-box h3{margin:0;font-size:20px;display:flex;align-items:center;gap:10px;flex-wrap:wrap}
.badge-beta{font-size:12px;font-weight:700;color:#b45309;background:#fef3c7;border-radius:999px;padding:3px 10px}
.android-steps{margin:0;padding-left:20px;color:var(--muted);line-height:1.8}
.sha{font-size:11px;word-break:break-all;background:#eef2f7;padding:2px 6px;border-radius:6px}
.android-box{text-align:left}.android-box .android-steps li{text-align:left}

/* ---- Khu tải ứng dụng ---- */
.dl-sec{background:linear-gradient(180deg,#f4f7fc 0,#fff 100%)}
.dl-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:34px;align-items:stretch}
.dl-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:20px;padding:26px 22px 20px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:transform .2s,box-shadow .2s}
.dl-card:hover{transform:translateY(-3px);box-shadow:0 16px 38px rgba(15,23,42,.13)}
.dl-card.is-you{border-color:var(--blue);box-shadow:0 0 0 3px rgba(10,132,255,.16),var(--shadow)}
.dl-you{display:none;position:absolute;top:-11px;left:50%;transform:translateX(-50%);white-space:nowrap;font-size:12px;font-weight:700;color:#fff;background:var(--blue);padding:3px 12px;border-radius:999px}
.dl-card.is-you .dl-you{display:block}
.dl-ico{width:56px;height:56px;border-radius:15px;display:flex;align-items:center;justify-content:center;color:#fff;margin-bottom:14px}
.dl-ico-ios{background:#111}.dl-ico-android{background:#16a34a}.dl-ico-mac{background:linear-gradient(135deg,#6b7280,#374151)}.dl-ico-windows{background:linear-gradient(135deg,#0a84ff,#0662c7)}
.dl-card h3{margin:0;font-size:21px}
.dl-sub{margin:6px 0 0;color:var(--muted);font-size:14.5px;min-height:44px}
.dl-meta{margin:12px 0 16px;font-size:13px;color:var(--muted);padding:8px 10px;background:var(--soft);border-radius:10px}
.dl-btn{width:100%}
.dl-how{margin-top:auto;font-size:14px;border-top:1px solid var(--line);padding-top:10px}
.dl-how summary{cursor:pointer;font-weight:600;color:var(--blue)}
.dl-how ol{margin:10px 0 0;padding-left:18px;color:var(--muted);line-height:1.65}
.dl-how li{margin-bottom:6px}
.dl-sha{margin:10px 0 0;font-size:12px;color:var(--muted);word-break:break-all}
.dl-feats{list-style:none;margin:36px auto 0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:12px 28px;max-width:960px}
.dl-feats li{position:relative;padding-left:26px;color:var(--muted);font-size:15px}
.dl-feats li:before{content:"";position:absolute;left:0;top:7px;width:14px;height:14px;border-radius:50%;background:var(--ok) no-repeat center/9px url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 6.2l2.2 2.2 4.8-4.8' fill='none' stroke='%23fff' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E")}
@media (max-width:1040px){.dl-grid{grid-template-columns:repeat(2,1fr)}.dl-feats{grid-template-columns:repeat(2,1fr)}}
@media (max-width:620px){.dl-grid{grid-template-columns:1fr}.dl-feats{grid-template-columns:1fr}.dl-sub{min-height:0}}
@media (prefers-reduced-motion:reduce){.dl-card{transition:none}.dl-card:hover{transform:none}}

.was-row{display:flex;align-items:center;gap:8px;font-size:14px;font-weight:500;margin-bottom:2px}.was{color:var(--muted);font-weight:500}.off{background:#fee2e2;color:#dc2626;font-size:12px;font-weight:700;padding:1px 8px;border-radius:999px}

/* Công tắc ngôn ngữ VI | EN */
.lang{display:flex;border:1px solid var(--line,#e5e7eb);border-radius:999px;overflow:hidden;margin:0 12px 0 auto;flex:none}
.lang a{padding:5px 11px;font-size:13px;font-weight:600;color:var(--muted,#64748b)}
.lang a.on{background:var(--blue,#0a84ff);color:#fff}
.brand + ul{margin-left:32px}
@media(max-width:480px){.lang{margin:0 8px 0 auto}.lang a{padding:5px 9px}.nav .btn-sm{padding:8px 12px;font-size:13px}.brand{font-size:17px}}

/* ===== Tự động hóa: ảnh trình thiết kế quy trình ===== */
.auto-shot{margin:36px auto 0;max-width:1040px}
.auto-shot img{display:block;width:100%;height:auto;aspect-ratio:1376/768;border-radius:24px;box-shadow:0 24px 60px rgba(99,102,241,.16)}
.auto-shot figcaption{margin-top:12px;text-align:center;font-size:14px;color:var(--muted)}

/* Hero: hành trình bán hàng vẽ bằng HTML + SVG */
.hero{overflow:hidden}
.hero-head{text-align:center;max-width:880px;margin:0 auto}
.hero-head .lead{margin:0 auto}
.grad{background:linear-gradient(90deg,#ec2a9a,#8b5cf6 55%,#0a84ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.journey{position:relative;margin:34px 0 0}
.jr-lines{position:absolute;inset:0;width:100%;height:100%;z-index:0;pointer-events:none;overflow:visible}
.jr-lines path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.jr-lines .glow{stroke:#ec2a9a;stroke-width:20;opacity:.38;filter:url(#jrglow)}
.jr-lines .main{stroke:url(#jrg);stroke-width:9}
.jr-lines .core{stroke:#fff;stroke-width:2.2;opacity:.9}
.jr-lines .spark{stroke:#fff;stroke-width:3.4;stroke-dasharray:2 60;animation:jrflow 2.4s linear infinite;opacity:.95}
@keyframes jrflow{to{stroke-dashoffset:-62}}
@media (prefers-reduced-motion:reduce){.jr-lines .spark{animation:none;display:none}}
.jr-list{position:relative;z-index:1;list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:18px;align-items:start}
.stage{display:flex;flex-direction:column;align-items:center;text-align:center;min-width:0}
.stage:nth-child(even){margin-top:64px}
.jr-tile{width:132px;height:118px;border-radius:24px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:4px;background:rgba(255,255,255,.82);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1px solid rgba(255,255,255,.95);box-shadow:0 16px 36px rgba(139,92,246,.18),inset 0 1px 0 #fff}
.jr-ico{font-size:40px;line-height:1;filter:drop-shadow(0 6px 8px rgba(15,23,42,.18))}
.jr-tile b{font-size:17px;letter-spacing:-.01em}
.jr-txt{margin-top:14px;font-size:13.5px;line-height:1.45;color:#334155;min-width:0}
.jr-txt p{margin:0 0 3px}
.jr-txt ul{margin:0;padding:0;list-style:none;text-align:left;display:inline-block}
.jr-txt li{position:relative;padding-left:14px;margin-bottom:3px}
.jr-txt li:before{content:"";position:absolute;left:2px;top:.6em;width:5px;height:5px;border-radius:50%;background:#ec2a9a}
.jr-badges{display:flex;justify-content:center;flex-wrap:nowrap;gap:4px;margin:8px -12px 0}
.sprite{position:absolute;width:0;height:0;overflow:hidden}
.jr-badges .bi{width:22px;height:22px;border-radius:6px;box-shadow:0 3px 8px rgba(15,23,42,.16)}
.jr-badges span{width:22px;height:22px;border-radius:6px;display:grid;place-items:center;font-size:12px;font-weight:800}
.jr-badges .more{background:#fff;color:var(--muted);border:1px solid var(--line);box-shadow:none}
.hero-foot{max-width:780px;margin:34px auto 0;text-align:center;display:flex;flex-direction:column;align-items:center}
.jr-more{margin:0 0 4px;color:var(--muted);font-weight:600;font-size:15px}
.hero-foot .cta{justify-content:center}
@media (max-width:900px){
  .jr-list{grid-template-columns:1fr;gap:26px;max-width:440px;margin:0 auto}
  .stage,.stage:nth-child(even){flex-direction:row;align-items:center;text-align:left;margin-top:0;gap:16px}
  .jr-tile{flex:0 0 108px;width:108px;height:100px;border-radius:20px}
  .jr-ico{font-size:32px}.jr-tile b{font-size:15px}
  .jr-txt{margin-top:0;flex:1}
  .jr-badges{justify-content:flex-start;margin:8px 0 0;flex-wrap:wrap}
}
@media (max-width:560px){.hero .cta{flex-wrap:nowrap;gap:10px;width:100%}.hero .cta .btn{flex:1 1 0;min-width:0;padding:13px 12px;font-size:15px;white-space:nowrap}}

/* AI & ứng dụng đặc biệt: thẻ NotebookLM nổi bật + các AI nối về trợ lý */
.brain{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,1.05fr);gap:44px;align-items:center;margin-top:44px}
.nb{border-radius:30px;padding:10px;background:linear-gradient(135deg,#fb923c,#ef4444 30%,#a855f7 62%,#3b82f6 85%,#22d3ee);box-shadow:0 0 0 1px rgba(255,255,255,.6) inset,0 24px 70px rgba(168,85,247,.35),0 0 50px rgba(236,72,153,.25)}
.nb-in{position:relative;overflow:hidden;border-radius:22px;padding:30px 30px 32px;background:linear-gradient(160deg,rgba(255,255,255,.96),rgba(250,245,255,.92) 55%,rgba(236,246,255,.92));box-shadow:inset 0 0 0 1px rgba(255,255,255,.9)}
.tag{display:inline-block;background:#111827;color:#fff;font-size:12px;font-weight:800;letter-spacing:.03em;padding:5px 12px;border-radius:999px}
.nb-ico{width:84px;height:84px;margin:18px 0 16px;border-radius:22px;display:grid;place-items:center;background:linear-gradient(145deg,#6d83f2,#3f51b5);box-shadow:0 14px 28px rgba(63,81,181,.35),inset 0 1px 0 rgba(255,255,255,.35)}
.nb h3{font-size:34px;margin:0 0 6px;letter-spacing:-.02em}
.nb-sub{font-size:18px;color:#334155;margin:0 0 14px}
.nb ul{list-style:none;margin:0;padding:0;display:grid;gap:7px;font-size:16px;color:#1e293b}
.nb li{padding-left:28px;position:relative}
.nb li:before{content:"✓";position:absolute;left:2px;color:var(--ok);font-weight:800}
.nb-docs{position:absolute;top:26px;right:26px;width:150px;height:140px}
.nb-docs i{position:absolute;width:86px;height:108px;border-radius:9px;background:repeating-linear-gradient(transparent 0 9px,#94a3b8 9px 12px) 14px 14px/58px 80px no-repeat,#fff;box-shadow:0 14px 26px rgba(30,41,59,.18);border:1px solid #e2e8f0}
.nb-docs i:nth-child(1){left:52px;top:14px;transform:rotate(14deg);background-image:repeating-linear-gradient(transparent 0 9px,#93c5fd 9px 12px)}
.nb-docs i:nth-child(2){left:28px;top:6px;transform:rotate(4deg);background-image:repeating-linear-gradient(transparent 0 9px,#93c5fd 9px 12px)}
.nb-docs i:nth-child(3){left:0;top:4px;transform:rotate(-12deg)}
.models{position:relative}
.md-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible;z-index:0}
.md-lines path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.md-lines .glow{stroke:#ec2a9a;stroke-width:7;opacity:.18}
.md-lines .line{stroke:#ec2a9a;stroke-width:2.2}
.md-grid{position:relative;z-index:1;display:grid;grid-template-columns:minmax(0,1fr) 118px minmax(0,1fr);grid-template-rows:repeat(3,auto);gap:22px 0;align-items:center}
.mcard{display:flex;align-items:center;gap:14px;background:#fff;border-radius:18px;padding:18px;box-shadow:0 12px 30px rgba(15,23,42,.08);border:1px solid rgba(226,232,240,.8);font-weight:700;font-size:21px;letter-spacing:-.01em;min-width:0}
.mcard[data-side="l"]{grid-column:1}.mcard[data-side="r"]{grid-column:3}
.mcard em{display:block;font-style:normal;font-size:12px;font-weight:700;color:#fff;background:#ec2a9a;border-radius:999px;padding:2px 10px;margin-top:4px;width:max-content}
.mt{flex:none;width:44px;height:44px;border-radius:12px;box-shadow:0 6px 14px rgba(15,23,42,.14)}
.md-hub{grid-column:2;grid-row:2;justify-self:center;width:66px;height:66px;border-radius:50%;display:grid;place-items:center;background:radial-gradient(circle,#fff 55%,#fde7f3);box-shadow:0 0 0 6px rgba(236,42,154,.08),0 0 34px rgba(236,42,154,.45)}
.md-hub img{width:34px;height:34px;border-radius:8px}
.md-note{text-align:center;color:#475569;font-size:15px;margin:18px 0 0}
@media (max-width:980px){.brain{grid-template-columns:1fr;max-width:620px;margin-left:auto;margin-right:auto}}
@media (max-width:560px){
  .md-grid{grid-template-columns:1fr 1fr;gap:12px}
  .mcard[data-side]{grid-column:auto}.md-hub{display:none}
  .mcard{padding:12px;gap:10px;font-size:16px;border-radius:14px}.mt{width:34px;height:34px;border-radius:9px}
  .mcard em{font-size:10.5px;padding:1px 7px}
  .nb-in{padding:22px}.nb h3{font-size:28px}.nb-sub{font-size:16px}.nb ul{font-size:15px}
  .nb-docs{transform:scale(.7);transform-origin:top right;top:16px;right:12px}
}
/* AI Agent: việc trợ lý làm được */
.ai-sec{background:radial-gradient(900px 420px at 15% 0,#f3e8ff 0,transparent 65%),radial-gradient(800px 400px at 100% 100%,#e0f2fe 0,transparent 60%),#fff}
.ai-caps{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-top:40px}
.ai-caps .card h3{font-size:17.5px}
.ai-note{margin:28px auto 0;max-width:760px;text-align:center;color:var(--muted);font-size:14.5px}
@media (max-width:900px){.ai-caps{grid-template-columns:repeat(2,minmax(0,1fr))}.nlm-in{grid-template-columns:1fr;gap:18px;padding:22px}}
@media (max-width:560px){.ai-caps{grid-template-columns:1fr}.ai-models{grid-template-columns:1fr 1fr}.nlm h4{font-size:21px}}

/* MCP: AI agent điều khiển cửa hàng (thay phần «Vì sao») */
.mcp-sec{overflow:hidden;background:radial-gradient(420px 360px at 44% 58%,rgba(236,72,153,.28),transparent 70%),radial-gradient(420px 360px at 56% 52%,rgba(59,130,246,.24),transparent 70%),linear-gradient(180deg,#f8f7ff,#eef0fb)}
.mcp-head h2{font-size:clamp(28px,4.2vw,46px)}
.mcp-sub{margin:0;font-size:clamp(20px,2.6vw,32px);color:#1e293b;font-weight:500;letter-spacing:-.01em}
.mcp{position:relative;display:grid;grid-template-columns:minmax(0,1fr) 330px minmax(0,1fr);gap:36px;align-items:center;margin-top:36px;padding-bottom:40px}
.mcp-lines{position:absolute;inset:0;width:100%;height:100%;pointer-events:none;overflow:visible;z-index:0}
.mcp-lines path{fill:none;stroke-linecap:round;stroke-linejoin:round}
.mcp-lines .glow{stroke-width:18;opacity:.45;filter:url(#mcpglow)}
.mcp-lines .cable{stroke-width:8}
.mcp-lines .core{stroke:rgba(255,255,255,.75);stroke-width:2}
.mcp-lines .spark{stroke:#fff;stroke-width:3.4;stroke-dasharray:3 46;animation:mcpflow 1.4s linear infinite}
@keyframes mcpflow{to{stroke-dashoffset:-49}}
.mcp-lines .wire{stroke:#f4a3cf;stroke-width:1.8}
@media (prefers-reduced-motion:reduce){.mcp-lines .spark{animation:none;display:none}}
.mcp-col{position:relative;z-index:1;min-width:0}
.mcp-label{font-size:15px;letter-spacing:.04em;text-transform:uppercase;font-weight:800;color:#0f172a;margin:0 0 14px;text-align:center}
.mcp-agents{display:flex;flex-direction:column;gap:16px;max-width:300px}
.mcp-agent{position:relative;display:flex;align-items:center;gap:16px;padding:16px 18px;border-radius:20px;background:linear-gradient(135deg,rgba(255,255,255,.85),rgba(255,255,255,.55));backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border:1.5px solid rgba(255,255,255,.95);box-shadow:0 14px 34px rgba(15,23,42,.10),inset 0 0 0 1px rgba(148,163,184,.25);font-weight:700;font-size:22px;letter-spacing:-.01em;color:#0f172a}
.mcp-agent:after{content:"";position:absolute;right:-22px;top:50%;width:26px;height:30px;margin-top:-15px;border-radius:7px;background:var(--c);box-shadow:inset -6px 0 0 rgba(0,0,0,.18),0 0 14px var(--c)}
.mcp-letter{flex:none;width:62px;height:62px;border-radius:16px;display:grid;place-items:center;color:#fff;font-size:32px;font-weight:800;background:var(--t);box-shadow:0 8px 18px rgba(15,23,42,.18),inset 0 1px 0 rgba(255,255,255,.35)}
.mcp-bot{font-size:30px}
.mcp-core{display:flex;flex-direction:column;align-items:center}
.mcp-core:after{content:"";position:absolute;left:50%;top:100%;width:8px;height:120px;margin-left:-4px;border-radius:4px;background:linear-gradient(#ec4899,#8b5cf6 50%,rgba(59,130,246,0));box-shadow:0 0 18px #ec4899}
.mcp-cmd{position:absolute;top:-58px;left:-150px;width:150px;background:#fff;border:1px solid #e2e8f0;border-radius:12px 12px 2px 12px;padding:9px 12px;font-size:14px;line-height:1.4;box-shadow:0 10px 24px rgba(15,23,42,.12);z-index:3}
.mcp-sphere{position:relative;z-index:3;width:210px;height:210px;border-radius:50%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;background:radial-gradient(circle at 32% 26%,rgba(255,255,255,1) 0,rgba(255,255,255,.85) 18%,rgba(241,236,255,.55) 52%,rgba(196,181,253,.45) 78%,rgba(236,72,153,.25));border:1.5px solid rgba(255,255,255,.95);box-shadow:inset 0 -18px 40px rgba(139,92,246,.30),inset 0 10px 30px rgba(255,255,255,.9),0 0 70px rgba(236,72,153,.40),0 0 110px rgba(59,130,246,.30)}
.mcp-sphere img{width:40px;height:40px;border-radius:10px}
.mcp-sphere b{font-size:22px;color:#1e1b4b;letter-spacing:-.01em}
.mcp-base{position:relative;z-index:2;width:150px;height:30px;margin-top:-14px;border-radius:50%;background:radial-gradient(ellipse at 50% 40%,#fff,#e9d5ff 60%,#c4b5fd);box-shadow:0 0 30px rgba(236,72,153,.6),0 6px 0 #ddd6fe}
.mcp-port{position:relative;z-index:1;margin-top:-6px;width:300px;height:170px;clip-path:polygon(16% 0,84% 0,100% 50%,84% 100%,16% 100%,0 50%);background:linear-gradient(90deg,#f472b6,#c084fc 50%,#60a5fa);padding:3px;filter:drop-shadow(0 18px 30px rgba(139,92,246,.35))}
.mcp-port span{display:grid;place-items:center;width:100%;height:100%;clip-path:polygon(16% 0,84% 0,100% 50%,84% 100%,16% 100%,0 50%);background:linear-gradient(170deg,#fff 0,#f5f3ff 55%,#e0e7ff);font-size:76px;font-weight:900;letter-spacing:-.02em;color:#1e1b4b}
.mcp-store{max-width:300px;justify-self:end;width:100%}
.mcp-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.mcp-tile{display:flex;flex-direction:column;align-items:center;gap:6px;padding:14px 6px 12px;border-radius:16px;background:#fff;border:1px solid #eef0f4;box-shadow:0 10px 24px rgba(15,23,42,.07);font-size:14.5px;font-weight:600;color:#1e293b;text-align:center}
.mcp-tile svg{width:34px;height:34px}
.mcp-done{position:absolute;left:-128px;bottom:22px;background:#ecfdf3;color:#15803d;border:1px solid #bbf7d0;font-weight:700;font-size:14px;padding:7px 12px;border-radius:10px;white-space:nowrap;box-shadow:0 6px 16px rgba(22,163,74,.15)}
@media (max-width:1100px){.mcp{grid-template-columns:minmax(0,1fr) 280px minmax(0,1fr)}.mcp-port{width:250px;height:142px}.mcp-port span{font-size:62px}.mcp-sphere{width:180px;height:180px}.mcp-cmd{display:none}}
@media (max-width:900px){
  .mcp{grid-template-columns:1fr;gap:30px;max-width:520px;margin-left:auto;margin-right:auto;padding-bottom:0}
  .mcp-agents{max-width:none;display:grid;grid-template-columns:1fr 1fr;gap:10px}
  .mcp-agents .mcp-label{grid-column:1/-1}
  .mcp-agent{font-size:15px;padding:10px;gap:10px;border-radius:14px}.mcp-agent:after{display:none}
  .mcp-letter{width:38px;height:38px;font-size:19px;border-radius:10px}.mcp-bot{font-size:20px}
  .mcp-core:after{display:none}
  .mcp-cmd{display:block;position:static;width:auto;margin-bottom:12px;border-radius:12px}
  .mcp-sphere{width:150px;height:150px}.mcp-sphere b{font-size:17px}.mcp-port{width:220px;height:124px}.mcp-port span{font-size:54px}
  .mcp-store{max-width:none;justify-self:stretch}
  .mcp-done{position:static;display:inline-block;margin-top:12px}
}

/* Nút nổi «Trợ lý» → mở chat Zalo */
.ai-fab{position:fixed;right:calc(20px + env(safe-area-inset-right,0px));bottom:calc(20px + env(safe-area-inset-bottom,0px));z-index:60;display:inline-flex;align-items:center;gap:8px;padding:12px 20px 12px 16px;border-radius:999px;color:#fff;font-weight:700;font-size:16px;line-height:1;background:linear-gradient(135deg,#a78bfa 0%,#8b7cf6 45%,#7c9cf5 100%);box-shadow:0 10px 26px rgba(124,108,246,.38),0 2px 6px rgba(15,23,42,.12);transition:transform .15s ease,box-shadow .15s ease}
.ai-fab:hover{text-decoration:none;transform:translateY(-2px);box-shadow:0 14px 32px rgba(124,108,246,.48),0 3px 8px rgba(15,23,42,.14)}
.ai-fab:focus-visible{outline:3px solid rgba(124,108,246,.45);outline-offset:3px}
.ai-fab svg{width:20px;height:20px;flex:none}
@media (max-width:480px){.ai-fab{padding:11px 16px 11px 13px;font-size:15px;right:calc(14px + env(safe-area-inset-right,0px));bottom:calc(14px + env(safe-area-inset-bottom,0px))}}