:root{
    --navy:#0e2d49;--navy-d:#0a2338;--navy-dd:#081c2e;--navy-l:#123a5e;--navy-ll:#16436e;
    --ink:#0c2138;--paper:#ffffff;--paper-2:#f4f8fc;--line:#dde9f2;
    --line-navy:rgba(255,255,255,.11);--glass:rgba(9,32,54,.62);--glass-brd:rgba(120,190,220,.22);
    --cyan:#2fd4ec;--cyan-2:#15b3cf;--cyan-deep:#0b8ba3;--cyan-soft:#e2f7fb;
    --blue:#3b82f6;--violet:#8b93ff;--gold:#f5b544;--green:#3ecf8e;
    --tx:#f2f8fc;--tx-dim:#d5e6f2;--tx-mute:#a8c4d8;--muted:#c0d5e5;--faint:#a8c4d8;
    --glow:rgba(47,212,236,.18);--glow-2:rgba(139,147,255,.16);
  }
  *{margin:0;padding:0;box-sizing:border-box}
  html{scroll-behavior:smooth}
  body{font-family:'Segoe UI',system-ui,-apple-system,Arial,sans-serif;background:#0c2f4d;color:var(--tx);line-height:1.62;-webkit-font-smoothing:antialiased;overflow-x:hidden}
  h1,h2,h3{line-height:1.1;letter-spacing:-.025em;font-weight:800}
  a{text-decoration:none;color:inherit}
  .wrap{max-width:1220px;margin:0 auto;padding:0 24px}
  ::selection{background:var(--cyan);color:var(--navy-d)}
  .eyebrow{display:inline-flex;align-items:center;gap:9px;font-size:11.5px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:var(--cyan)}
  .eyebrow::before{content:"";width:26px;height:1.5px;background:var(--cyan)}

  .aurora{position:fixed;inset:0;z-index:-2;background:linear-gradient(165deg,#103a5e 0%,#0c2f4d 45%,#0a2740 100%);overflow:hidden}
  .aurora::before,.aurora::after{content:"";position:absolute;width:60vw;height:60vw;border-radius:50%;filter:blur(110px);opacity:.55;animation:drift 34s ease-in-out infinite}.aurora .blob3{position:absolute;width:48vw;height:48vw;border-radius:50%;filter:blur(120px);opacity:.32;background:radial-gradient(circle,rgba(59,130,246,.5),transparent 60%);top:30%;left:40%;animation:drift2 42s ease-in-out infinite}#netfx{position:fixed;inset:0;z-index:-1;width:100%;height:100%;opacity:.55;pointer-events:none;mask-image:radial-gradient(ellipse 85% 65% at 50% 10%,#000,transparent 80%)}
  .aurora::before{background:radial-gradient(circle,var(--glow),transparent 65%);top:-25vw;right:-15vw}
  .aurora::after{background:radial-gradient(circle,var(--glow-2),transparent 65%);bottom:-25vw;left:-15vw;animation-delay:-11s}
  @keyframes drift{0%,100%{transform:translate(0,0) scale(1)}33%{transform:translate(5vw,3vw) scale(1.14)}66%{transform:translate(-3vw,5vw) scale(1.05)}}@keyframes drift2{0%,100%{transform:translate(0,0) scale(1)}50%{transform:translate(-6vw,-4vw) scale(1.2)}}
  .grid-bg{position:fixed;inset:0;z-index:-1;background-image:linear-gradient(rgba(47,212,236,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(47,212,236,.03) 1px,transparent 1px);background-size:56px 56px;mask-image:radial-gradient(ellipse 80% 60% at 50% 0%,#000,transparent 75%)}

  /* HEADER */
  header{position:sticky;top:0;z-index:80;background:rgba(6,20,36,.72);backdrop-filter:blur(20px) saturate(1.6);border-bottom:1px solid var(--line-navy)}
  .nav{display:flex;align-items:center;justify-content:space-between;height:82px;gap:20px}
  .brand{display:flex;align-items:center;gap:12px}
  .brand img{height:52px;width:auto;display:block}
  .navlinks{display:flex;gap:20px;font-size:15.5px;font-weight:700;align-items:center;white-space:nowrap}
  .navlinks>a,.navlinks>.drop>a{position:relative;transition:.2s;padding:4px 0;color:#fff;background:linear-gradient(110deg,#fff 0%,#fff 40%,var(--cyan) 50%,#fff 60%,#fff 100%);background-size:220% 100%;background-position:100% 0;-webkit-background-clip:text;background-clip:text;cursor:pointer;display:inline-flex;align-items:center;gap:5px}
  .navlinks>a:hover,.navlinks>.drop:hover>a{background-position:0 0;-webkit-text-fill-color:transparent}
  .navlinks>a.cur{-webkit-text-fill-color:transparent;background-position:0 0}
  .drop{position:relative}
  .drop>a::after{content:"▾";font-size:10px;-webkit-text-fill-color:var(--cyan);margin-left:2px;transition:.2s}
  .drop:hover>a::after{transform:rotate(180deg)}
  .drop-menu{position:absolute;top:calc(100% + 14px);left:50%;transform:translateX(-50%) translateY(10px);min-width:250px;background:rgba(10,30,49,.97);backdrop-filter:blur(24px) saturate(1.4);border:1px solid var(--glass-brd);border-radius:16px;padding:10px;opacity:0;visibility:hidden;transition:.28s cubic-bezier(.2,.7,.2,1);box-shadow:0 30px 70px -20px rgba(0,0,0,.7),inset 0 1px 0 rgba(255,255,255,.08);z-index:90}
  .drop-menu::before{content:"";position:absolute;top:-7px;left:50%;transform:translateX(-50%) rotate(45deg);width:14px;height:14px;background:rgba(10,30,49,.97);border-left:1px solid var(--glass-brd);border-top:1px solid var(--glass-brd)}
  .drop:hover .drop-menu{opacity:1;visibility:visible;transform:translateX(-50%) translateY(0)}
  .drop-menu a{display:flex;align-items:center;gap:12px;padding:11px 13px;border-radius:11px;font-size:13.5px;font-weight:500;color:var(--tx-dim);transition:.18s;-webkit-text-fill-color:currentColor;background:none}
  .drop-menu a:hover{background:rgba(47,212,236,.1);color:#fff;-webkit-text-fill-color:#fff}
  .drop-menu a .di{width:32px;height:32px;border-radius:9px;display:flex;align-items:center;justify-content:center;flex-shrink:0;box-shadow:0 3px 8px -2px rgba(0,0,0,.4),inset 0 1px 1px rgba(255,255,255,.4);position:relative;overflow:hidden}
  .drop-menu a .di::after{content:"";position:absolute;top:0;left:0;right:0;height:45%;background:linear-gradient(180deg,rgba(255,255,255,.4),transparent)}
  .drop-menu a .di svg{position:relative;z-index:1}
  .drop-menu a .dt{display:flex;flex-direction:column;gap:1px}
  .drop-menu a .dt b{font-size:13.5px;font-weight:600;color:#fff}
  .drop-menu a .dt span{font-size:11.5px;color:var(--tx-mute)}
  .navr{display:flex;align-items:center;gap:14px}
  .lang{display:flex;gap:2px;background:var(--glass);border:1px solid var(--glass-brd);border-radius:9px;padding:2px;backdrop-filter:blur(10px)}
  .lang button{background:transparent;color:var(--tx-mute);border:none;padding:5px 9px;border-radius:6px;font-size:12px;font-weight:600;cursor:pointer;font-family:inherit;transition:.15s}
  .lang button:hover{color:#fff}.lang button.on{background:var(--cyan);color:var(--navy-d)}
  .ncta{padding:9px 18px;border-radius:9px;background:linear-gradient(150deg,#5ce6f7,#12aec6);color:var(--navy-d);font-weight:700;font-size:14px;transition:.2s;position:relative;overflow:hidden;box-shadow:0 6px 16px -5px rgba(47,212,236,.5),inset 0 1px 1px rgba(255,255,255,.5);white-space:nowrap;flex-shrink:0}
  .ncta::after{content:"";position:absolute;top:0;left:0;right:0;height:45%;background:linear-gradient(180deg,rgba(255,255,255,.4),transparent);pointer-events:none}
  @media(max-width:960px){.navlinks{display:none}.ncta{display:none}}

  /* PAGE HERO */
  .phero{padding:56px 0 44px;position:relative}
  .breadcrumb{display:flex;gap:9px;align-items:center;font-size:13px;color:var(--tx-dim);margin-bottom:20px;flex-wrap:wrap}
  .breadcrumb a{color:var(--tx-dim);transition:.15s}.breadcrumb a:hover{color:var(--cyan)}
  .breadcrumb .sep{color:var(--tx-mute)}
  @keyframes slideInL{from{opacity:0;transform:translateX(-40px)}to{opacity:1;transform:translateX(0)}}
  @keyframes fadeUp{from{opacity:0;transform:translateY(24px)}to{opacity:1;transform:translateY(0)}}
  body.anim-ready .phero .breadcrumb{animation:slideInL .6s cubic-bezier(.2,.7,.2,1) .05s both}
  body.anim-ready .phero .eyebrow{animation:slideInL .7s cubic-bezier(.2,.7,.2,1) .16s both}
  body.anim-ready .phero h1{animation:slideInL .8s cubic-bezier(.2,.7,.2,1) .28s both}
  body.anim-ready .phero .lead{animation:slideInL .8s cubic-bezier(.2,.7,.2,1) .44s both}
  body.anim-ready .phero .tags{animation:fadeUp .8s cubic-bezier(.2,.7,.2,1) .6s both}
  .phero h1{font-size:clamp(30px,4.4vw,50px);color:#fff;margin-bottom:18px;max-width:900px}
  .phero .lead{font-size:18px;color:var(--tx-dim);max-width:720px}
  .phero .tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
  .ptag{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:600;color:#fff;background:var(--glass);border:1px solid rgba(47,212,236,.35);padding:8px 15px;border-radius:30px;backdrop-filter:blur(10px);transition:.25s;box-shadow:0 4px 12px -4px rgba(0,0,0,.4)}
  .ptag::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--cyan);box-shadow:0 0 8px var(--cyan)}
  .ptag:hover{border-color:var(--cyan);transform:translateY(-2px)}
  .phero .tags .ptag:nth-child(1)::before{background:#5ee6a3;box-shadow:0 0 8px #5ee6a3}
  .phero .tags .ptag:nth-child(2)::before{background:#2fd4ec;box-shadow:0 0 8px #2fd4ec}
  .phero .tags .ptag:nth-child(3)::before{background:#ffd257;box-shadow:0 0 8px #ffd257}
  .phero .tags .ptag:nth-child(4)::before{background:#5aa8ff;box-shadow:0 0 8px #5aa8ff}

  /* CONTENT */
  section{padding:40px 0}
  .glass{background:var(--glass);border:1px solid var(--glass-brd);border-radius:18px;backdrop-filter:blur(16px);box-shadow:0 24px 50px -24px rgba(0,0,0,.55),0 8px 20px -10px rgba(0,0,0,.4),inset 0 1px 0 rgba(255,255,255,.06)}
  .content-grid{display:grid;grid-template-columns:1fr 340px;gap:36px;align-items:start}
  .prose{font-size:15.5px;color:var(--tx-dim);line-height:1.75}
  .prose h2{font-size:26px;color:#fff;margin:8px 0 18px}
  .prose h3{font-size:19px;color:var(--cyan);margin:28px 0 12px}
  .prose p{margin-bottom:16px}
  .prose strong{color:var(--tx)}
  .feat-list{list-style:none;margin:20px 0}
  .feat-list li{display:flex;gap:12px;align-items:flex-start;margin-bottom:16px;padding:16px 18px;background:var(--glass);border:1px solid var(--glass-brd);border-radius:12px;backdrop-filter:blur(10px)}
  .feat-list .ico{flex-shrink:0;width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden;box-shadow:0 4px 10px -3px rgba(0,0,0,.4),inset 0 1px 1px rgba(255,255,255,.4);transition:.35s cubic-bezier(.2,.7,.2,1)}
  .feat-list li:hover .ico{transform:translateY(-2px) scale(1.1) rotate(-5deg)}
  .feat-list li{transition:.25s}
  .feat-list li:hover{border-color:rgba(47,212,236,.4);transform:translateX(4px)}
  .feat-list .ico::after{content:"";position:absolute;top:0;left:0;right:0;height:45%;background:linear-gradient(180deg,rgba(255,255,255,.4),transparent)}
  .feat-list .ico svg{position:relative;z-index:1}
  .ic-cyan{background:linear-gradient(150deg,#4fe6f7,#0e9cc4)}
  .ic-blue{background:linear-gradient(150deg,#5aa8ff,#1e5fd8)}
  .ic-violet{background:linear-gradient(150deg,#a78bfa,#6d3fe0)}
  .ic-green{background:linear-gradient(150deg,#5ee6a3,#14a86b)}
  .ic-amber{background:linear-gradient(150deg,#ffd257,#f39917)}
  .ic-rose{background:linear-gradient(150deg,#ff9bb3,#e84c74)}
  .ic-teal{background:linear-gradient(150deg,#4fe8d0,#0d9e9e)}
  .feat-list .tx b{display:block;color:#fff;font-size:15px;margin-bottom:3px}
  .feat-list .tx span{font-size:13.5px;color:var(--tx-dim)}
  .use-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:20px 0}
  .use{padding:20px;background:var(--glass);border:1px solid var(--glass-brd);border-radius:14px;backdrop-filter:blur(10px);transition:.25s}
  .use:hover{transform:translateY(-3px);border-color:rgba(47,212,236,.4);box-shadow:0 20px 40px -24px rgba(0,0,0,.5)}
  .use h4{color:#fff;font-size:15px;margin-bottom:7px;display:flex;align-items:center;gap:9px}
  .use p{font-size:13.5px;color:var(--tx-dim);margin:0}
  .use .d{width:10px;height:10px;border-radius:50%;flex-shrink:0}
  .use:nth-child(1) .d{background:#2fd4ec;box-shadow:0 0 10px #2fd4ec}
  .use:nth-child(2) .d{background:#5aa8ff;box-shadow:0 0 10px #5aa8ff}
  .use:nth-child(3) .d{background:#5ee6a3;box-shadow:0 0 10px #5ee6a3}
  .use:nth-child(4) .d{background:#ffd257;box-shadow:0 0 10px #ffd257}
  /* spec table */
  .spec{width:100%;border-collapse:collapse;margin:18px 0;border-radius:14px;overflow:hidden;background:var(--glass);border:1px solid var(--glass-brd)}
  .spec th,.spec td{text-align:left;padding:13px 18px;border-bottom:1px solid var(--line-navy);font-size:14px}
  .spec th{background:rgba(47,212,236,.12);color:#fff;font-weight:700;width:38%}
  .spec td{color:var(--tx-dim)}
  .spec tr:last-child th,.spec tr:last-child td{border-bottom:none}
  /* sidebar */
  .side-card{padding:24px;margin-bottom:20px}
  .side-card h3{font-size:16px;color:#fff;margin-bottom:16px;display:flex;align-items:center;gap:9px}
  .side-links a{display:flex;gap:11px;align-items:center;padding:12px 0;border-bottom:1px solid var(--line-navy);font-size:14px;color:var(--tx-dim);transition:.2s}
  .side-links a:last-child{border-bottom:none}
  .side-links a:hover{color:#fff;padding-left:5px}
  .side-links a .ar{width:24px;height:24px;border-radius:7px;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:#fff;flex-shrink:0;box-shadow:0 3px 8px -2px rgba(0,0,0,.4),inset 0 1px 1px rgba(255,255,255,.4);transition:.25s}
  .side-links a:hover .ar{transform:scale(1.12) rotate(-6deg)}
  .side-links a:nth-child(1) .ar{background:linear-gradient(150deg,#5aa8ff,#1e5fd8)}
  .side-links a:nth-child(2) .ar{background:linear-gradient(150deg,#a78bfa,#6d3fe0)}
  .side-links a:nth-child(3) .ar{background:linear-gradient(150deg,#5ee6a3,#14a86b)}
  .side-links a:nth-child(4) .ar{background:linear-gradient(150deg,#ffd257,#f39917)}
  .side-links a:nth-child(5) .ar{background:linear-gradient(150deg,#4fe6f7,#0e9cc4)}
  .side-cta{background:linear-gradient(150deg,#0e3155,#081f36);text-align:center}
  .side-cta h3{justify-content:center;margin-bottom:8px}
  .side-cta p{font-size:13.5px;color:var(--tx-dim);margin-bottom:18px}
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:13px 22px;border-radius:11px;font-weight:700;font-size:14.5px;cursor:pointer;border:none;font-family:inherit;transition:.2s;width:100%}
  .btn-p{background:linear-gradient(150deg,#5ce6f7,#12aec6);color:var(--navy-d);position:relative;overflow:hidden;box-shadow:0 8px 22px -6px rgba(47,212,236,.5),inset 0 1px 1px rgba(255,255,255,.5)}
  .btn-p::after{content:"";position:absolute;top:0;left:0;right:0;height:45%;background:linear-gradient(180deg,rgba(255,255,255,.4),transparent);pointer-events:none}
  .btn-p:hover{transform:translateY(-2px)}
  @media(max-width:900px){.content-grid{grid-template-columns:1fr}.use-grid{grid-template-columns:1fr}}

  /* CTA + FOOTER (đồng bộ v7) */
  .cta-box{border-radius:26px;padding:56px 40px;text-align:center;position:relative;overflow:hidden;margin:40px 0}
  .cta-box::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 280px at 50% 0%,var(--glow),transparent 60%)}
  .cta-box>*{position:relative}
  .cta-box h2{font-size:clamp(26px,3.4vw,40px);color:#fff;margin-bottom:14px}
  .cta-box p{color:var(--tx-dim);font-size:17px;max-width:560px;margin:0 auto 28px}
  .cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
  .cta-box .btn{width:auto;padding:15px 28px}
  .btn-o{border:1px solid var(--glass-brd);color:#fff;background:var(--glass);backdrop-filter:blur(10px)}.btn-o:hover{border-color:var(--cyan)}

  footer{border-top:1px solid var(--line-navy);padding:58px 0 30px;font-size:14px;position:relative;overflow:hidden;background:rgba(20,60,90,.4);margin-top:20px}
  .foot-grid{position:relative;display:grid;grid-template-columns:1.5fr 1fr 1.2fr 1.1fr;gap:34px;margin-bottom:38px}
  footer h5{color:#fff;font-size:12px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:16px}
  footer .brand img{height:44px;margin-bottom:16px}
  .fitem{display:flex;gap:9px;margin-bottom:11px;color:#e4f0f8;align-items:flex-start}
  .fitem .ar{color:var(--cyan);flex-shrink:0}
  footer a{color:#e4f0f8;transition:.15s}footer a:hover{color:var(--cyan)}
  .flist a{display:flex;gap:9px;margin-bottom:11px;align-items:flex-start}
  .flist a .ar{color:var(--cyan);flex-shrink:0}
  .socrow{display:flex;gap:10px;margin-top:18px}
  .socrow a{width:40px;height:40px;border-radius:11px;display:flex;align-items:center;justify-content:center;transition:.3s;position:relative;overflow:hidden;box-shadow:0 6px 16px -5px rgba(0,0,0,.5),inset 0 1px 1px rgba(255,255,255,.35)}
  .socrow a::after{content:"";position:absolute;top:0;left:0;right:0;height:45%;background:linear-gradient(180deg,rgba(255,255,255,.4),transparent);pointer-events:none}
  .socrow a svg{position:relative;z-index:1}
  .soc-fb{background:linear-gradient(150deg,#4a90ff,#1877f2)}.soc-yt{background:linear-gradient(150deg,#ff5a5a,#e60000)}
  .soc-tt{background:linear-gradient(150deg,#3a3a44,#010101)}.soc-in{background:linear-gradient(150deg,#3aa0e0,#0a66c2)}
  .socrow a:hover{transform:translateY(-3px) scale(1.08)}
  .foot-bottom{position:relative;border-top:1px solid var(--line-navy);padding-top:22px;text-align:center;font-size:12.5px;color:#c3d8e6}
  @media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}

  [data-l]{display:none}[data-l].on{display:block}
  span[data-l]{display:none}span[data-l].on{display:inline}
  li[data-l].on{display:flex}
  @media(max-width:820px){.phero{padding:36px 0 30px}section{padding:28px 0}}
  .rv{opacity:0;transform:translateY(26px);transition:.75s cubic-bezier(.2,.7,.2,1)}
  .rv.in{opacity:1;transform:none}
  @media(prefers-reduced-motion:reduce){.rv{opacity:1;transform:none}}