:root {
  --navy: #052f43;
  --deep: #031f2d;
  --blue: #087aa1;
  --cyan: #22c4e6;
  --electric: #56ddf4;
  --ink: #102d39;
  --paper: #f2f5f3;
  --steel: #dfe7e8;
  --line: rgba(5, 63, 86, .16);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background-color: #cfd9dc;
  background-image: linear-gradient(rgba(5,47,67,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(5,47,67,.045) 1px, transparent 1px);
  background-size: 32px 32px;
  color: var(--ink);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
button, a { font: inherit; }
a { color: inherit; text-decoration: none; }
main, footer { width: min(100%, 560px); margin-inline: auto; background: var(--paper); }

.hero { position: relative; min-height: 760px; overflow: hidden; isolation: isolate; color: white; background: linear-gradient(145deg, #031f2d 0%, #064b66 62%, #087b9d 100%); }
.hero::before { content: ""; position: absolute; z-index: 2; inset: auto 0 0; height: 330px; background: linear-gradient(180deg, transparent 0%, rgba(2,27,40,.58) 31%, #021d2a 100%); pointer-events: none; }
.hero::after { content: "HỒ SƠ / 01"; position: absolute; z-index: 4; top: 148px; right: 18px; padding-left: 38px; color: rgba(255,255,255,.55); font: 700 8px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .18em; background: linear-gradient(90deg, var(--cyan) 0 28px, transparent 28px) center left / 28px 1px no-repeat; }
html[lang="en"] .hero::after { content: "PROFILE / 01"; }
.hero-noise { position: absolute; z-index: 3; inset: 0; opacity: .1; pointer-events: none; background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 180 180' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.35'/%3E%3C/svg%3E"); }
.blueprint-grid { position: absolute; z-index: 0; inset: 0; opacity: .25; background-image: linear-gradient(rgba(86,221,244,.17) 1px, transparent 1px), linear-gradient(90deg, rgba(86,221,244,.17) 1px, transparent 1px), linear-gradient(rgba(86,221,244,.08) 1px, transparent 1px), linear-gradient(90deg, rgba(86,221,244,.08) 1px, transparent 1px); background-size: 80px 80px, 80px 80px, 16px 16px, 16px 16px; animation: grid-drift 18s linear infinite; }
.scanline { position: absolute; z-index: 5; left: 0; right: 0; height: 1px; background: linear-gradient(90deg, transparent, rgba(86,221,244,.88), transparent); box-shadow: 0 0 18px rgba(86,221,244,.45); opacity: .65; animation: scan 6s ease-in-out infinite; pointer-events: none; }
.tech-orbit { position: absolute; z-index: 1; top: 130px; right: -118px; width: 370px; aspect-ratio: 1; border: 1px solid rgba(34,196,230,.4); border-radius: 50%; animation: orbit 26s linear infinite; }
.tech-orbit::before, .tech-orbit::after { content: ""; position: absolute; inset: 38px; border: 1px dashed rgba(34,196,230,.27); border-radius: 50%; }
.tech-orbit::after { inset: 95px; border-style: solid; }
.tech-orbit span { position: absolute; width: 7px; height: 7px; border: 1px solid var(--cyan); background: var(--deep); transform: rotate(45deg); }
.tech-orbit span:nth-child(1) { top: 30px; left: 78px; }
.tech-orbit span:nth-child(2) { right: -4px; top: 180px; }
.tech-orbit span:nth-child(3) { bottom: 34px; left: 86px; }

.brandbar { position: relative; z-index: 6; display: flex; align-items: center; gap: 12px; min-height: 82px; padding: 18px 20px; border-bottom: 1px solid rgba(86,221,244,.2); background: rgba(2,31,44,.72); backdrop-filter: blur(10px); }
.personal-mark { position: relative; width: 54px; height: 42px; display: grid; place-items: center; border: 1px solid rgba(86,221,244,.55); color: white; background: rgba(34,196,230,.08); font: 800 13px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .12em; clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%); box-shadow: inset 3px 0 var(--cyan); }
.brand-title { display: grid; gap: 5px; }
.brand-title span { color: white; font-size: 8px; line-height: 1.3; letter-spacing: .17em; font-weight: 800; }
.language-switch { position: absolute; z-index: 10; top: 96px; right: 18px; display: flex; align-items: center; gap: 3px; padding: 4px; border: 1px solid rgba(86,221,244,.38); background: rgba(3,31,45,.84); box-shadow: 0 10px 28px rgba(0,0,0,.22), inset 0 1px rgba(255,255,255,.05); backdrop-filter: blur(12px); clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 0 100%); }
.language-icon { display: grid; place-items: center; width: 27px; height: 30px; color: var(--cyan); font-size: 16px; text-shadow: 0 0 10px rgba(34,196,230,.6); }
.lang-button { min-width: 72px; height: 30px; padding: 0 10px; border: 0; color: rgba(255,255,255,.68); background: transparent; font: 750 10px/1 Inter, ui-sans-serif, system-ui, sans-serif; letter-spacing: .02em; cursor: pointer; transition: color .2s ease, background .2s ease, box-shadow .2s ease; }
.lang-button:hover { color: white; background: rgba(34,196,230,.1); }
.lang-button.active { color: #031f2d; background: linear-gradient(135deg, #66e5f8, #22c4e6); box-shadow: 0 0 16px rgba(34,196,230,.3); }
.lang-button:focus-visible { outline: 2px solid white; outline-offset: 2px; }

.portrait-wrap { position: absolute; z-index: 1; inset: 92px -250px auto -250px; height: 505px; }
.portrait-wrap::after { content: ""; position: absolute; left: 50%; bottom: 25px; width: 360px; height: 44px; transform: translateX(-50%); border-radius: 50%; background: rgba(3,31,45,.35); filter: blur(22px); }
.portrait-halo { position: absolute; z-index: 1; width: 390px; height: 390px; left: 50%; top: 35px; transform: translateX(-1%); border: 1px solid rgba(34,196,230,.42); border-radius: 50%; box-shadow: 0 0 0 18px rgba(34,196,230,.03), inset 0 0 40px rgba(34,196,230,.08); animation: halo-pulse 4s ease-in-out infinite; }
.portrait { position: relative; z-index: 2; width: 100%; height: 100%; object-fit: contain; object-position: center; filter: saturate(.95) contrast(1.04) drop-shadow(0 25px 30px rgba(0,0,0,.22)); animation: portrait-float 7s ease-in-out infinite; }

.hero-copy { position: absolute; z-index: 7; left: 18px; right: 18px; bottom: 22px; padding: 18px 18px 17px; border: 1px solid rgba(86,221,244,.34); border-left: 3px solid var(--cyan); background: linear-gradient(135deg, rgba(2,31,44,.96), rgba(5,63,83,.9)); box-shadow: 0 20px 45px rgba(0,0,0,.32), inset 0 1px rgba(255,255,255,.05); backdrop-filter: blur(12px); clip-path: polygon(0 0, calc(100% - 18px) 0, 100% 18px, 100% 100%, 0 100%); }
.hero-status { display: inline-flex; align-items: center; gap: 7px; margin-bottom: 15px; color: rgba(255,255,255,.7); font: 700 8px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .16em; }
.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 0 4px rgba(34,196,230,.13), 0 0 12px var(--cyan); animation: status-pulse 2s ease-out infinite; }
.eyebrow, .section-kicker { margin: 0 0 10px; color: var(--cyan); font-size: 9px; font-weight: 850; letter-spacing: .22em; }
.hero h1 { margin: 0; color: white; font-size: clamp(44px, 13vw, 64px); line-height: .96; letter-spacing: -.05em; font-weight: 790; text-shadow: 0 6px 24px rgba(0,0,0,.34); }
.company { max-width: 390px; margin: 12px 0 5px; color: white; font-size: 13px; line-height: 1.42; font-weight: 750; }
.motto { margin: 0; color: rgba(255,255,255,.72); font-size: 10px; letter-spacing: .04em; }
.hero-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 14px; }
.hero-tags span { padding: 5px 8px; border: 1px solid rgba(86,221,244,.28); color: #bceefa; background: rgba(34,196,230,.07); font: 700 8px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .08em; }

.quick-actions { position: relative; z-index: 8; display: grid; grid-template-columns: 1fr 1fr; gap: 10px; padding: 28px 18px 20px; border-top: 10px solid #e2eaec; background: #fff; }
.quick-actions::before { content: ""; position: absolute; top: 18px; left: 18px; width: 44px; height: 2px; background: var(--cyan); }
.action { appearance: none; min-height: 74px; border: 1px solid #9bc5cf; border-left: 3px solid var(--blue); border-radius: 0; display: flex; gap: 10px; align-items: center; padding: 12px; text-align: left; color: var(--ink); background: #fff; cursor: pointer; box-shadow: 0 5px 14px rgba(5,47,67,.045); transition: transform .25s ease, border-color .25s ease, background .25s ease, box-shadow .25s ease; }
.action:hover { transform: translateY(-2px); border-color: var(--blue); background: #f5fbfc; box-shadow: 0 9px 20px rgba(5,47,67,.09); }
.action.primary { border-color: #79b8c8; border-left-color: var(--blue); background: #fff; }
.action-icon { flex: 0 0 35px; width: 35px; height: 35px; display: grid; place-items: center; border: 1px solid #72b7c8; border-radius: 50%; background: #f2fafb; color: var(--blue); font-weight: 900; }
.primary .action-icon { border-color: #72b7c8; background: #f2fafb; color: var(--blue); }
.action-icon.zalo { border: 1px solid #8bbbea; background: #f4f9ff; color: #0b7cff; }
.action-icon.facebook-personal { border: 1px solid #8bbbea; background: #f4f9ff; color: #1877f2; font-family: Arial, sans-serif; font-size: 21px; }
.action-icon.linkedin-personal { border: 1px solid #8bbbea; background: #eef6ff; color: #0a66c2; font-family: Arial, sans-serif; font-size: 12px; }
.action b, .action small { display: block; }
.action b { color: var(--navy); font-size: 12px; }
.action small { margin-top: 3px; color: #6c7e85; font-size: 9px; }

.systems-band { overflow: hidden; padding: 14px 0; border-top: 1px solid #d9e4e7; border-bottom: 1px solid #cbdadd; background: #fff; color: var(--navy); }
.systems-track { display: flex; align-items: center; justify-content: center; gap: 11px; white-space: nowrap; }
.systems-track span { color: #526a73; font: 750 7px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .12em; }
.systems-track i { width: 4px; height: 4px; transform: rotate(45deg); background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }

.section { position: relative; overflow: hidden; padding: 70px 22px; }
.section::after { content: "+"; position: absolute; top: 21px; right: 22px; color: rgba(5,63,86,.22); font: 300 26px/1 ui-monospace, monospace; }
.section h2, .qr-section h2 { position: relative; margin: 0 0 28px; color: var(--navy); font-size: 36px; line-height: 1.1; font-weight: 780; letter-spacing: -.04em; }
.section h2::after { content: ""; display: block; width: 48px; height: 3px; margin-top: 17px; background: linear-gradient(90deg, var(--cyan), transparent); }
.section > p:not(.section-kicker) { margin: 0 0 15px; color: #3f5963; font-size: 14px; line-height: 1.78; }
.section strong { color: #082f40; }
.intro { background-color: #f5f7f4; background-image: linear-gradient(rgba(8,75,98,.045) 1px, transparent 1px), linear-gradient(90deg, rgba(8,75,98,.045) 1px, transparent 1px); background-size: 24px 24px; }
.process-grid { display: grid; grid-template-columns: 1fr 1fr; margin: 30px 0; border-top: 1px solid var(--line); border-left: 1px solid var(--line); background: rgba(255,255,255,.55); }
.process-grid div { position: relative; min-height: 92px; padding: 15px; border-right: 1px solid var(--line); border-bottom: 1px solid var(--line); transition: background .25s ease, transform .25s ease; }
.process-grid div:hover { z-index: 1; transform: translateY(-2px); background: white; box-shadow: 0 9px 24px rgba(5,47,67,.08); }
.process-grid b { display: block; margin-bottom: 13px; color: var(--cyan); font: 800 9px/1 ui-monospace, monospace; letter-spacing: .1em; }
.process-grid span { color: var(--navy); font-size: 12px; line-height: 1.35; font-weight: 760; }
blockquote { position: relative; margin: 34px 0 0; padding: 24px 20px 24px 24px; border: 0; border-left: 3px solid var(--cyan); color: white; background: linear-gradient(135deg, #063c53, #052b3d); font-size: 17px; line-height: 1.58; font-style: italic; box-shadow: 0 14px 35px rgba(5,47,67,.15); }
blockquote::after { content: "TẦM NHÌN / TKN"; position: absolute; right: 12px; bottom: 9px; color: rgba(255,255,255,.2); font: 700 7px/1 ui-monospace, monospace; letter-spacing: .12em; }
html[lang="en"] blockquote::after { content: "VISION / TKN"; }

.ecosystem { background: #dfe7e7; }
.ecosystem::before { content: "HỆ SINH THÁI"; position: absolute; right: -94px; top: 150px; color: rgba(5,47,67,.04); font-size: 54px; font-weight: 900; letter-spacing: -.06em; transform: rotate(90deg); }
html[lang="en"] .ecosystem::before { content: "ECOSYSTEM"; right: -35px; top: 110px; font-size: 66px; }
.company-list { display: grid; gap: 10px; }
.company-card { position: relative; display: grid; grid-template-columns: 42px 1fr; gap: 12px; padding: 20px 16px; border: 1px solid rgba(5,63,86,.14); background: rgba(255,255,255,.76); box-shadow: 0 8px 24px rgba(5,47,67,.05); clip-path: polygon(0 0, calc(100% - 16px) 0, 100% 16px, 100% 100%, 0 100%); transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease; }
.company-card::after { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 2px; background: var(--cyan); transform: scaleY(0); transform-origin: bottom; transition: transform .3s ease; }
.company-card:hover { transform: translateX(4px); border-color: rgba(34,196,230,.62); box-shadow: 0 14px 30px rgba(5,47,67,.12); }
.company-card:hover::after { transform: scaleY(1); }
.company-card .number { color: var(--blue); font: 800 10px/1 ui-monospace, monospace; letter-spacing: .12em; }
.company-card h3 { margin: 0 0 8px; color: var(--navy); font-size: 14px; line-height: 1.45; }
.company-card p { margin: 0; color: #536970; font-size: 12px; line-height: 1.65; }

.industries { overflow: hidden; padding: 30px 0 34px; background: #031e2c; color: white; }
.industries > p { margin: 0 22px 22px; color: var(--cyan); font: 800 8px/1 ui-monospace, monospace; letter-spacing: .2em; }
.industry-grid { display: flex; flex-wrap: wrap; gap: 8px; padding: 0 22px; }
.industry-grid span { position: relative; flex: 1 1 calc(33.333% - 8px); min-width: 112px; padding: 12px 10px 12px 24px; border: 1px solid rgba(86,221,244,.18); color: rgba(255,255,255,.9); background: rgba(34,196,230,.04); font-size: 10px; font-weight: 750; text-transform: uppercase; letter-spacing: .06em; white-space: nowrap; }
.industry-grid span::before { content: ""; position: absolute; left: 10px; top: 50%; width: 5px; height: 5px; transform: translateY(-50%) rotate(45deg); background: var(--cyan); box-shadow: 0 0 8px rgba(34,196,230,.7); }

.connect { background: #f8faf8; }
.connect > p:not(.section-kicker) { margin-top: -10px; margin-bottom: 24px; }
.socials { border-top: 1px solid var(--line); }
.socials a { position: relative; display: grid; grid-template-columns: 1fr auto; align-items: center; padding: 14px 12px 14px 0; border-bottom: 1px solid var(--line); font-size: 13px; font-weight: 720; transition: padding .22s ease, color .22s ease, background .22s ease; }
.socials a::before { content: ""; position: absolute; left: 0; top: 50%; width: 0; height: 1px; background: var(--cyan); transition: width .22s ease; }
.socials a:hover { padding-left: 22px; color: var(--blue); background: linear-gradient(90deg, rgba(34,196,230,.07), transparent); }
.socials a:hover::before { width: 14px; }
.socials b { color: var(--blue); }
.socials small { grid-column: 1 / -1; margin-top: 5px; color: #75848a; font-size: 9px; font-weight: 400; }
.social-label { display: flex; align-items: center; gap: 12px; }
.social-icon { flex: 0 0 30px; width: 30px; height: 30px; display: grid; place-items: center; filter: drop-shadow(0 4px 8px rgba(5,47,67,.12)); transition: transform .22s ease; }
.social-icon svg { display: block; width: 100%; height: 100%; }
.social-icon.simple { border: 1px solid #8eb9c5; border-radius: 6px; color: var(--blue); background: #eef8fa; font-weight: 900; font-size: 14px; }
.social-icon.linkedin-tknet { color: #0a66c2; background: #eef6ff; font-family: Arial, sans-serif; }
.socials a:hover .social-icon { transform: translateY(-2px) scale(1.05); }

.qr-section { position: relative; display: flex; align-items: center; justify-content: space-between; gap: 18px; overflow: hidden; padding: 42px 22px; background: #d9e6e7; }
.qr-section::before { content: ""; position: absolute; inset: 0; background-image: radial-gradient(rgba(5,63,86,.18) 1px, transparent 1px); background-size: 12px 12px; opacity: .35; }
.qr-section > * { position: relative; z-index: 1; }
.qr-section h2 { margin-bottom: 10px; font-size: 27px; }
.qr-section p:not(.section-kicker) { margin: 0; color: #53666d; font-size: 10px; line-height: 1.55; }
.qr-code { width: 132px; height: 132px; border: 1px solid rgba(5,63,86,.16); border-radius: 0; background: white; padding: 8px; box-shadow: 10px 10px 0 rgba(5,47,67,.09); }
.qr-page-link { display:inline-block; margin-top:10px; color:var(--blue); font-size:9px; font-weight:750; text-decoration:none; }

footer { position: relative; overflow: hidden; padding: 38px 22px 110px; text-align: center; background: #031e2c; color: white; }
footer::before { content: ""; position: absolute; inset: 0; background: linear-gradient(90deg, transparent 49.8%, rgba(86,221,244,.08) 50%, transparent 50.2%); }
.footer-signature { position: relative; width: 72px; height: 54px; margin: 0 auto; display: grid; place-items: center; border: 1px solid rgba(86,221,244,.45); color: white; background: rgba(34,196,230,.06); font: 800 17px/1 ui-monospace, SFMono-Regular, Consolas, monospace; letter-spacing: .14em; clip-path: polygon(0 0, calc(100% - 11px) 0, 100% 11px, 100% 100%, 0 100%); box-shadow: inset 3px 0 var(--cyan); }
footer p { position: relative; margin: 12px 0 0; color: rgba(255,255,255,.55); font-size: 8px; text-transform: uppercase; letter-spacing: .18em; }

.bottom-bar { position: fixed; z-index: 20; left: 50%; bottom: 0; transform: translateX(-50%); width: min(100%, 560px); display: grid; grid-template-columns: repeat(3, 1fr); padding: 8px max(10px, env(safe-area-inset-left)) calc(8px + env(safe-area-inset-bottom)); background: rgba(3,30,44,.95); border-top: 1px solid rgba(86,221,244,.28); backdrop-filter: blur(14px); }
.bottom-bar a, .bottom-bar button { border: 0; background: transparent; display: grid; place-items: center; gap: 2px; color: white; font-size: 8px; font-weight: 700; cursor: pointer; }
.bottom-bar span { color: var(--cyan); font-size: 18px; line-height: 1; }
.bottom-bar em { font-style: normal; }
.toast { position: fixed; z-index: 30; left: 50%; bottom: 85px; transform: translate(-50%, 20px); max-width: calc(100% - 40px); padding: 11px 16px; border: 1px solid rgba(86,221,244,.28); border-radius: 2px; background: #031e2c; color: white; font-size: 11px; opacity: 0; pointer-events: none; transition: .25s ease; }
.toast.show { opacity: 1; transform: translate(-50%, 0); }

[data-reveal] { opacity: 0; transform: translateY(24px); transition: opacity .7s cubic-bezier(.2,.8,.2,1), transform .7s cubic-bezier(.2,.8,.2,1); }
[data-reveal].is-visible { opacity: 1; transform: translateY(0); }
.company-card[data-reveal]:nth-child(2) { transition-delay: .09s; }
.company-card[data-reveal]:nth-child(3) { transition-delay: .18s; }

@keyframes grid-drift { to { background-position: 80px 80px, 80px 80px, 16px 16px, 16px 16px; } }
@keyframes scan { 0%,100% { top: 96px; opacity: 0; } 12% { opacity: .65; } 78% { opacity: .35; } 88% { top: 710px; opacity: 0; } }
@keyframes orbit { to { transform: rotate(360deg); } }
@keyframes halo-pulse { 0%,100% { transform: translateX(-1%) scale(.98); opacity: .55; } 50% { transform: translateX(-1%) scale(1.03); opacity: .9; } }
@keyframes portrait-float { 0%,100% { transform: translateY(0); } 50% { transform: translateY(-5px); } }
@keyframes status-pulse { 0% { box-shadow: 0 0 0 0 rgba(34,196,230,.35), 0 0 12px var(--cyan); } 70% { box-shadow: 0 0 0 7px rgba(34,196,230,0), 0 0 12px var(--cyan); } 100% { box-shadow: 0 0 0 0 rgba(34,196,230,0), 0 0 12px var(--cyan); } }
@keyframes marquee { to { transform: translateX(-50%); } }

@media (min-width: 561px) {
  body { padding-block: 24px; }
  main, footer, .bottom-bar { box-shadow: 0 24px 80px rgba(5,35,49,.2); }
  .bottom-bar { bottom: 24px; }
}

@media (prefers-reduced-motion: reduce) {
  * { scroll-behavior: auto !important; animation-duration: .01ms !important; animation-iteration-count: 1 !important; }
  [data-reveal] { opacity: 1; transform: none; }
}