/* =========================================================
   INEVINA - style.css  (v1.1 - giao diện không gian / UAV)
   Đổi màu thương hiệu & font ở phần :root ngay bên dưới
   ========================================================= */
:root {
  --bg: #04050d;
  --bg-2: #080b1c;
  --panel: rgba(140, 170, 255, 0.05);
  --line: rgba(130, 170, 255, 0.16);
  --line-strong: rgba(130, 200, 255, 0.38);
  --text: #e9eeff;
  --muted: #97a3c7;
  --cyan: #35e6ff;
  --violet: #4d7dff;
  --amber: #ffb547;
  --grad: linear-gradient(100deg, #2ef2ff 0%, #2f9bff 55%, #4d6bff 100%);
  --font-body: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-head: "Exo 2", "Be Vietnam Pro", system-ui, sans-serif;
  --font-logo: "Orbitron", "Exo 2", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --radius: 18px;
  --container: 1200px;
  --header-h: 76px;
  --ease: cubic-bezier(0.2, 0.7, 0.2, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img, svg { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; margin: 0; padding: 0; }
h1, h2, h3, h4 { font-family: var(--font-head); line-height: 1.15; margin: 0 0 0.5em; font-weight: 700; letter-spacing: 0.01em; text-wrap: balance; }
h1 { font-size: clamp(2.2rem, 5.2vw, 4.2rem); font-weight: 800; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); }
h3 { font-size: 1.25rem; }
p { margin: 0 0 1em; }
button { font: inherit; color: inherit; cursor: pointer; }
::selection { background: rgba(53, 230, 255, 0.3); color: #fff; }
:focus-visible { outline: 2px solid var(--cyan); outline-offset: 3px; border-radius: 6px; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.icon { width: 1.5em; height: 1.5em; fill: none; stroke: currentColor; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; flex: none; }
.grad-text { background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; background-size: 200% auto; animation: gradShift 6s linear infinite; }
.text-muted { color: var(--muted); }

/* ---------- Nền vũ trụ ---------- */
#starfield { position: fixed; inset: 0; width: 100%; height: 100%; z-index: -3; pointer-events: none; }
.nebula { position: fixed; inset: 0; z-index: -2; pointer-events: none; overflow: hidden; }
.nebula i { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; animation: drift 26s ease-in-out infinite alternate; }
.nebula i:nth-child(1) { width: 46vw; height: 46vw; left: -12vw; top: -14vw; background: radial-gradient(circle, rgba(70, 90, 255, 0.5), transparent 65%); }
.nebula i:nth-child(2) { width: 40vw; height: 40vw; right: -12vw; top: 22vh; background: radial-gradient(circle, rgba(30, 110, 255, 0.4), transparent 65%); animation-duration: 32s; animation-delay: -8s; }
.nebula i:nth-child(3) { width: 36vw; height: 36vw; left: 28vw; bottom: -20vw; background: radial-gradient(circle, rgba(30, 200, 255, 0.28), transparent 65%); animation-duration: 38s; animation-delay: -15s; }
.grid-overlay { position: fixed; inset: 0; z-index: -1; pointer-events: none; opacity: 0.35;
  background-image: linear-gradient(rgba(120, 160, 255, 0.05) 1px, transparent 1px), linear-gradient(90deg, rgba(120, 160, 255, 0.05) 1px, transparent 1px);
  background-size: 64px 64px; mask-image: radial-gradient(ellipse at 50% 30%, #000 10%, transparent 75%); -webkit-mask-image: radial-gradient(ellipse at 50% 30%, #000 10%, transparent 75%); }

/* ---------- Thanh tiến trình cuộn + con trỏ ---------- */
.scroll-progress { position: fixed; top: 0; left: 0; height: 3px; width: 100%; background: var(--grad); transform-origin: 0 50%; transform: scaleX(0); z-index: 120; box-shadow: 0 0 12px rgba(53, 230, 255, 0.8); }
.cursor-glow { position: fixed; left: 0; top: 0; width: 420px; height: 420px; margin: -210px 0 0 -210px; border-radius: 50%; background: radial-gradient(circle, rgba(70, 160, 255, 0.13), transparent 62%); pointer-events: none; z-index: -1; opacity: 0; transition: opacity 0.4s; will-change: transform; }
.cursor-ring { position: fixed; left: 0; top: 0; width: 34px; height: 34px; margin: -17px 0 0 -17px; border: 1px solid rgba(53, 230, 255, 0.7); border-radius: 50%; pointer-events: none; z-index: 200; opacity: 0; transition: opacity 0.3s, width 0.25s var(--ease), height 0.25s var(--ease), margin 0.25s var(--ease), background 0.25s; will-change: transform; }
.cursor-ring::after { content: ""; position: absolute; left: 50%; top: 50%; width: 4px; height: 4px; margin: -2px; border-radius: 50%; background: var(--cyan); }
.cursor-ring.is-hover { width: 58px; height: 58px; margin: -29px 0 0 -29px; background: rgba(53, 230, 255, 0.08); }
body.has-pointer .cursor-glow, body.has-pointer .cursor-ring { opacity: 1; }

/* ---------- Màn hình chờ + chuyển trang ---------- */
.preloader { position: fixed; inset: 0; z-index: 300; background: var(--bg); display: grid; place-items: center; transition: opacity 0.6s, visibility 0.6s; }
.no-preloader .preloader { display: none; }
.preloader.is-done { opacity: 0; visibility: hidden; }
.preloader__inner { display: grid; justify-items: center; gap: 28px; }
.preloader__orbit { position: relative; width: 92px; height: 92px; }
.preloader__orbit::before, .preloader__orbit::after { content: ""; position: absolute; inset: 0; border-radius: 50%; border: 1px solid var(--line); border-top-color: var(--cyan); animation: spin 1.1s linear infinite; }
.preloader__orbit::after { inset: 16px; border-top-color: var(--violet); animation-duration: 0.8s; animation-direction: reverse; }
.preloader__orbit i { position: absolute; inset: 38px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 22px var(--cyan); animation: pulse 1.1s ease-in-out infinite; }
.preloader__text { font-family: var(--font-logo); letter-spacing: 0.5em; font-size: 0.95rem; padding-left: 0.5em; }
.page-fade { position: fixed; inset: 0; z-index: 250; background: var(--bg); opacity: 0; pointer-events: none; transition: opacity 0.28s; }
body.is-leaving .page-fade { opacity: 1; }

/* ---------- Header ---------- */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 100; height: var(--header-h); display: flex; align-items: center; transition: background 0.35s, border-color 0.35s, height 0.35s; border-bottom: 1px solid transparent; }
.site-header.is-scrolled { background: rgba(5, 7, 18, 0.72); backdrop-filter: blur(16px) saturate(1.4); -webkit-backdrop-filter: blur(16px) saturate(1.4); border-bottom-color: var(--line); height: 64px; }
.site-header .container { display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.logo { font-family: var(--font-logo); font-weight: 800; font-size: 1.4rem; letter-spacing: 0.22em; display: inline-flex; align-items: center; position: relative; white-space: nowrap; z-index: 2; }
.logo b { font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; background-size: 200% auto; animation: gradShift 5s linear infinite; }
.logo::after { content: ""; width: 7px; height: 7px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 12px var(--cyan); margin-left: 2px; align-self: flex-end; margin-bottom: 0.42em; animation: pulse 2s ease-in-out infinite; }
.nav { display: flex; align-items: center; gap: 28px; }
.nav__list { display: flex; gap: 4px; }
.nav__link { position: relative; display: block; padding: 10px 14px; font-size: 0.93rem; font-weight: 500; color: var(--muted); transition: color 0.25s; }
.nav__link::after { content: ""; position: absolute; left: 14px; right: 14px; bottom: 4px; height: 2px; background: var(--grad); transform: scaleX(0); transform-origin: 0 50%; transition: transform 0.35s var(--ease); border-radius: 2px; }
.nav__link:hover, .nav__link.is-active { color: #fff; }
.nav__link:hover::after, .nav__link.is-active::after { transform: scaleX(1); }
.nav__tools { display: flex; align-items: center; gap: 14px; }
.lang { display: inline-flex; border: 1px solid var(--line); border-radius: 999px; padding: 3px; background: var(--panel); }
.lang button { border: 0; background: none; padding: 5px 12px; border-radius: 999px; font-size: 0.78rem; font-weight: 600; letter-spacing: 0.08em; color: var(--muted); transition: all 0.25s; }
.lang button.is-active { background: var(--grad); color: #050713; }
.nav-toggle { display: none; width: 44px; height: 44px; border: 1px solid var(--line); border-radius: 12px; background: var(--panel); position: relative; }
.nav-toggle span { position: absolute; left: 12px; right: 12px; height: 2px; background: #fff; border-radius: 2px; transition: transform 0.3s var(--ease), opacity 0.2s, top 0.3s var(--ease); }
.nav-toggle span:nth-child(1) { top: 14px; } .nav-toggle span:nth-child(2) { top: 20px; } .nav-toggle span:nth-child(3) { top: 26px; }
body.nav-open .nav-toggle span:nth-child(1) { top: 20px; transform: rotate(45deg); }
body.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
body.nav-open .nav-toggle span:nth-child(3) { top: 20px; transform: rotate(-45deg); }

/* ---------- Nút ---------- */
.btn { --bx: 0px; --by: 0px; display: inline-flex; align-items: center; gap: 10px; padding: 14px 26px; border-radius: 999px; font-weight: 600; font-size: 0.95rem; border: 1px solid transparent; position: relative; overflow: hidden; transform: translate(var(--bx), var(--by)); transition: transform 0.25s var(--ease), box-shadow 0.3s, background 0.3s, border-color 0.3s; white-space: nowrap; }
.btn .icon { width: 1.15em; height: 1.15em; transition: transform 0.3s var(--ease); }
.btn:hover .icon { transform: translateX(4px); }
.btn--primary { background: var(--grad); background-size: 180% auto; color: #050713; box-shadow: 0 8px 30px -8px rgba(70, 170, 255, 0.7); }
.btn--primary::before { content: ""; position: absolute; top: 0; bottom: 0; left: -60%; width: 40%; background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.55), transparent); transform: skewX(-20deg); animation: shine 3.6s ease-in-out infinite; }
.btn--primary:hover { background-position: 100% 0; box-shadow: 0 12px 40px -6px rgba(90, 180, 255, 0.9); }
.btn--ghost { border-color: var(--line-strong); background: rgba(120, 170, 255, 0.06); color: #fff; }
.btn--ghost:hover { border-color: var(--cyan); background: rgba(53, 230, 255, 0.1); box-shadow: 0 0 26px -6px rgba(53, 230, 255, 0.6); }
.btn--sm { padding: 10px 20px; font-size: 0.86rem; }

/* ---------- Khối chung ---------- */
.section { padding: clamp(72px, 10vw, 130px) 0; position: relative; }
.section--tight { padding: clamp(48px, 6vw, 80px) 0; }
.section__head { max-width: 760px; margin: 0 auto clamp(40px, 5vw, 64px); text-align: center; }
.eyebrow { display: inline-flex; align-items: center; gap: 10px; font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.24em; text-transform: uppercase; color: var(--cyan); margin-bottom: 18px; }
.eyebrow::before { content: ""; width: 28px; height: 1px; background: var(--cyan); box-shadow: 0 0 8px var(--cyan); }
.lead { font-size: clamp(1rem, 1.4vw, 1.14rem); color: var(--muted); }
.grid { display: grid; gap: 24px; }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 6vw, 80px); align-items: center; }

/* Thẻ kính + viền phát sáng theo chuột */
.card { --mx: 50%; --my: 50%; --rx: 0deg; --ry: 0deg; position: relative; padding: 32px 28px; border-radius: var(--radius); background: linear-gradient(160deg, rgba(150, 180, 255, 0.08), rgba(150, 180, 255, 0.02)); border: 1px solid var(--line); overflow: hidden; transform: perspective(900px) rotateX(var(--rx)) rotateY(var(--ry)); transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s, opacity 0.9s var(--ease); }
.card::before { content: ""; position: absolute; inset: 0; background: radial-gradient(420px circle at var(--mx) var(--my), rgba(53, 230, 255, 0.16), transparent 45%); opacity: 0; transition: opacity 0.35s; pointer-events: none; }
.card::after { content: ""; position: absolute; left: 0; right: 0; top: 0; height: 1px; background: linear-gradient(90deg, transparent, var(--cyan), transparent); transform: translateX(-100%); transition: transform 0.9s var(--ease); }
.card:hover { border-color: var(--line-strong); box-shadow: 0 24px 60px -30px rgba(40, 140, 255, 0.6); }
.card:hover::before { opacity: 1; }
.card:hover::after { transform: translateX(100%); }
.card > * { position: relative; }
.card h3 { margin-bottom: 10px; }
.card p { color: var(--muted); font-size: 0.95rem; margin: 0; }
.card__icon { width: 58px; height: 58px; border-radius: 16px; display: grid; place-items: center; margin-bottom: 22px; color: var(--cyan); background: linear-gradient(140deg, rgba(53, 230, 255, 0.16), rgba(47, 155, 255, 0.12)); border: 1px solid var(--line-strong); position: relative; }
.card__icon .icon { width: 28px; height: 28px; }
.card__icon::after { content: ""; position: absolute; inset: -7px; border-radius: 20px; border: 1px dashed rgba(53, 230, 255, 0.3); opacity: 0; transition: opacity 0.3s; }
.card:hover .card__icon::after { opacity: 1; }
.card > .card__num { position: absolute; right: 22px; top: 16px; font-family: var(--font-logo); font-size: 2.6rem; font-weight: 800; color: transparent; -webkit-text-stroke: 1px rgba(130, 170, 255, 0.22); line-height: 1; }
.card__link { display: inline-flex; align-items: center; gap: 8px; margin-top: 20px; color: var(--cyan); font-weight: 600; font-size: 0.9rem; }
.card__link .icon { width: 1.1em; height: 1.1em; transition: transform 0.3s var(--ease); }
.card:hover .card__link .icon { transform: translateX(6px); }
.chips { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.chip { font-family: var(--font-mono); font-size: 0.7rem; letter-spacing: 0.06em; padding: 5px 10px; border-radius: 999px; border: 1px solid var(--line); color: var(--muted); background: rgba(10, 14, 34, 0.5); }
.checklist li { display: flex; gap: 12px; align-items: flex-start; margin-bottom: 12px; color: var(--muted); }
.checklist .icon { color: var(--cyan); width: 1.25em; height: 1.25em; margin-top: 0.25em; }

/* ---------- Hiệu ứng hiện dần ---------- */
.reveal { opacity: 0; translate: 0 36px; transition: opacity 0.9s var(--ease), translate 0.9s var(--ease), scale 0.9s var(--ease), transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s; transition-delay: var(--d, 0s), var(--d, 0s), var(--d, 0s), 0s, 0s, 0s; }
.reveal--left { translate: -48px 0; }
.reveal--right { translate: 48px 0; }
.reveal--zoom { translate: 0 0; scale: 0.9; }
.reveal.is-visible { opacity: 1; translate: 0 0; scale: 1; }
.split-words .w { display: inline-block; opacity: 0; transform: translateY(0.7em) rotate(4deg); filter: blur(8px); animation: wordIn 0.9s var(--ease) forwards; animation-delay: calc(var(--i) * 70ms + 0.25s); }

/* ---------- HERO ---------- */
.hero { min-height: min(100vh, 1080px); min-height: min(100svh, 1080px); display: flex; align-items: center; padding: calc(var(--header-h) + 40px) 0 120px; position: relative; overflow: hidden; }
.hero .container { display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 40px; align-items: center; position: relative; z-index: 1; }
.hero__badge { display: inline-flex; align-items: center; gap: 10px; padding: 7px 16px 7px 10px; border: 1px solid var(--line-strong); border-radius: 999px; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--cyan); background: rgba(53, 230, 255, 0.06); margin-bottom: 26px; }
.hero__badge i { width: 8px; height: 8px; border-radius: 50%; background: #3dffa0; box-shadow: 0 0 10px #3dffa0; animation: pulse 1.6s ease-in-out infinite; }
.hero h1 { margin-bottom: 22px; }
.hero__rotator { display: block; min-height: 1.2em; }
.hero__rotator .caret { display: inline-block; width: 3px; height: 0.9em; background: var(--cyan); margin-left: 6px; vertical-align: -0.08em; animation: blink 0.9s steps(1) infinite; box-shadow: 0 0 10px var(--cyan); }
.hero__lead { max-width: 560px; margin-bottom: 34px; }
.hero__cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero__meta { display: flex; flex-wrap: wrap; gap: 28px; margin-top: 48px; padding-top: 28px; border-top: 1px solid var(--line); }
.hero__meta div { font-size: 0.82rem; color: var(--muted); }
.hero__meta strong { display: block; font-family: var(--font-head); font-size: 1.5rem; color: #fff; line-height: 1.2; }
.hero__planet { position: absolute; left: 50%; top: calc(100% - 70px); width: 220vw; height: 220vw; margin-left: -110vw; border-radius: 50%; background: radial-gradient(circle at 50% 0%, #0d1a44 0%, #060a1e 12%, #04050d 30%); pointer-events: none; animation: planetGlow 7s ease-in-out infinite alternate; }
.scroll-hint { position: absolute; left: 50%; bottom: 24px; transform: translateX(-50%); display: grid; justify-items: center; gap: 10px; font-family: var(--font-mono); font-size: 0.66rem; letter-spacing: 0.3em; color: var(--muted); text-transform: uppercase; z-index: 1; }
.scroll-hint i { width: 22px; height: 36px; border: 1px solid var(--line-strong); border-radius: 12px; position: relative; }
.scroll-hint i::after { content: ""; position: absolute; left: 50%; top: 7px; width: 3px; height: 7px; margin-left: -1.5px; border-radius: 2px; background: var(--cyan); animation: scrollDot 1.8s ease-in-out infinite; }

/* Drone + HUD */
.drone-stage { position: relative; aspect-ratio: 1; width: 100%; max-width: 580px; margin-left: auto; --px: 0px; --py: 0px; }
.drone-stage__sweep { position: absolute; inset: 6%; border-radius: 50%; background: conic-gradient(from 0deg, rgba(53, 230, 255, 0.28), transparent 22%, transparent); animation: spin 5s linear infinite; mask-image: radial-gradient(circle, transparent 20%, #000 21%, #000 69%, transparent 70%); -webkit-mask-image: radial-gradient(circle, transparent 20%, #000 21%, #000 69%, transparent 70%); }
.drone-stage svg { position: absolute; inset: 0; width: 100%; height: 100%; overflow: visible; }
.hud-ring { transform-box: fill-box; transform-origin: center; animation: spin 40s linear infinite; }
.hud-ring--rev { animation-duration: 28s; animation-direction: reverse; }
.drone { transform-box: fill-box; transform-origin: center; animation: hover 6s ease-in-out infinite; }
.drone-parallax { transform: translate(var(--px), var(--py)); transition: transform 0.4s var(--ease); }
.rotor-blade { transform-box: fill-box; transform-origin: center; animation: spin 0.22s linear infinite; }
.rotor-blade--rev { animation-direction: reverse; }
.led { animation: blink 1.2s steps(1) infinite; }
.led--b { animation-delay: 0.6s; }
.lens { animation: pulse 2.4s ease-in-out infinite; transform-box: fill-box; transform-origin: center; }
.ping { transform-box: fill-box; transform-origin: center; animation: ping 3s ease-out infinite; }
.ping--2 { animation-delay: 1.5s; }
.hud-tag { position: absolute; padding: 8px 12px; border: 1px solid var(--line-strong); border-radius: 10px; background: rgba(6, 10, 28, 0.72); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.1em; color: var(--muted); animation: float 5s ease-in-out infinite; white-space: nowrap; }
.hud-tag b { display: block; color: var(--cyan); font-size: 0.95rem; font-weight: 600; letter-spacing: 0.04em; }
.hud-tag::before { content: ""; position: absolute; width: 6px; height: 6px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 10px var(--cyan); top: -3px; left: -3px; }
.hud-tag--1 { top: 6%; left: 0; }
.hud-tag--2 { top: 20%; right: -2%; animation-delay: -1.6s; }
.hud-tag--3 { bottom: 14%; left: 2%; animation-delay: -3s; }
.hud-tag--4 { bottom: 4%; right: 6%; animation-delay: -2.2s; }

/* ---------- Dải chữ chạy ---------- */
.marquee { border-block: 1px solid var(--line); background: rgba(8, 11, 28, 0.6); overflow: hidden; padding: 18px 0; position: relative; mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); -webkit-mask-image: linear-gradient(90deg, transparent, #000 12%, #000 88%, transparent); }
.marquee__track { display: flex; width: max-content; animation: marquee 38s linear infinite; }
.marquee:hover .marquee__track { animation-play-state: paused; }
.marquee__track span { display: inline-flex; align-items: center; gap: 56px; padding-right: 56px; font-family: var(--font-head); font-weight: 600; font-size: 1.05rem; letter-spacing: 0.2em; text-transform: uppercase; color: rgba(200, 215, 255, 0.55); white-space: nowrap; }
.marquee__track span::after { content: "✦"; color: var(--cyan); font-size: 0.8rem; }

/* ---------- Số liệu ---------- */
.stats { display: grid; grid-template-columns: repeat(4, 1fr); border: 1px solid var(--line); border-radius: var(--radius); background: linear-gradient(160deg, rgba(150, 180, 255, 0.07), rgba(150, 180, 255, 0.02)); overflow: hidden; }
.stat { padding: 34px 24px; text-align: center; position: relative; }
.stat + .stat::before { content: ""; position: absolute; left: 0; top: 22%; bottom: 22%; width: 1px; background: var(--line); }
.stat__num { font-family: var(--font-logo); font-size: clamp(2rem, 3.6vw, 3rem); font-weight: 800; line-height: 1.1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat__label { color: var(--muted); font-size: 0.88rem; margin-top: 8px; }

/* ---------- Khối quỹ đạo ---------- */
.orbit { position: relative; aspect-ratio: 1; width: 100%; max-width: 460px; margin: 0 auto; }
.orbit__ring { position: absolute; border-radius: 50%; border: 1px solid var(--line); animation: spin 30s linear infinite; }
.orbit__ring:nth-child(1) { inset: 0; }
.orbit__ring:nth-child(2) { inset: 14%; border-style: dashed; border-color: rgba(53, 230, 255, 0.28); animation-duration: 22s; animation-direction: reverse; }
.orbit__ring:nth-child(3) { inset: 28%; animation-duration: 15s; }
.orbit__ring::before { content: ""; position: absolute; top: -6px; left: 50%; width: 11px; height: 11px; margin-left: -5.5px; border-radius: 50%; background: var(--cyan); box-shadow: 0 0 16px var(--cyan); }
.orbit__ring:nth-child(2)::before { background: var(--violet); box-shadow: 0 0 16px var(--violet); top: auto; bottom: -6px; }
.orbit__ring:nth-child(3)::before { background: var(--amber); box-shadow: 0 0 16px var(--amber); }
.orbit__core { position: absolute; inset: 37%; border-radius: 50%; background: radial-gradient(circle at 35% 30%, #5fd6ff, #3b5bff 45%, #1a1250 80%); box-shadow: 0 0 60px rgba(70, 150, 255, 0.7), inset -10px -14px 30px rgba(0, 0, 0, 0.55); animation: float 6s ease-in-out infinite; }
.orbit__label { position: absolute; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); padding: 6px 12px; border: 1px solid var(--line); border-radius: 999px; background: rgba(6, 10, 28, 0.8); animation: float 5s ease-in-out infinite; white-space: nowrap; }
.orbit__label--1 { top: 4%; right: 0; }
.orbit__label--2 { bottom: 18%; left: 0; animation-delay: -2s; }
.orbit__label--3 { bottom: 2%; right: 10%; animation-delay: -3.4s; }

/* ---------- Quy trình ---------- */
.process { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.step { position: relative; padding: 30px 26px; border-radius: var(--radius); border: 1px solid var(--line); background: rgba(8, 11, 28, 0.55); }
.step:hover { border-color: var(--line-strong); transform: translateY(-6px); }
.step__num { font-family: var(--font-logo); font-size: 0.8rem; letter-spacing: 0.2em; color: var(--cyan); display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.step__num::after { content: ""; flex: 1; height: 1px; background: linear-gradient(90deg, var(--line-strong), transparent); }
.step p { color: var(--muted); font-size: 0.93rem; margin: 0; }

/* ---------- CTA ---------- */
@property --angle { syntax: "<angle>"; initial-value: 0deg; inherits: false; }
.cta { position: relative; border-radius: 28px; padding: clamp(40px, 7vw, 84px) clamp(24px, 6vw, 72px); border: 1px solid var(--line); overflow: hidden; text-align: center; background: radial-gradient(ellipse at 50% 120%, rgba(70, 110, 255, 0.4), transparent 60%), linear-gradient(160deg, rgba(20, 28, 70, 0.8), rgba(6, 8, 22, 0.9)); }
.cta::before { content: ""; position: absolute; inset: 0; border-radius: inherit; padding: 1.5px; background: conic-gradient(from var(--angle), transparent 0 70%, var(--cyan) 85%, var(--violet) 95%, transparent); -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0); -webkit-mask-composite: xor; mask-composite: exclude; animation: rotateAngle 6s linear infinite; pointer-events: none; }
.cta h2 { max-width: 760px; margin-inline: auto; }
.cta p { max-width: 600px; margin: 0 auto 30px; color: var(--muted); }
.cta__actions { display: flex; justify-content: center; flex-wrap: wrap; gap: 14px; }

/* ---------- Banner trang con ---------- */
.page-banner { padding: calc(var(--header-h) + clamp(60px, 9vw, 120px)) 0 clamp(56px, 7vw, 96px); position: relative; overflow: hidden; text-align: center; border-bottom: 1px solid var(--line); }
.page-banner::before, .page-banner::after { content: ""; position: absolute; left: 50%; top: 58%; border-radius: 50%; border: 1px solid var(--line); transform: translate(-50%, -50%); pointer-events: none; }
.page-banner::before { width: 720px; height: 720px; border-style: dashed; animation: spinCenter 60s linear infinite; }
.page-banner::after { width: 1040px; height: 1040px; opacity: 0.6; }
.page-banner .container { position: relative; z-index: 1; }
.page-banner p { max-width: 660px; margin: 0 auto; color: var(--muted); font-size: 1.06rem; }
.breadcrumb { display: inline-flex; gap: 10px; font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); margin-bottom: 22px; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span { color: var(--cyan); }

/* ---------- Sản phẩm ---------- */
.filters { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-bottom: 44px; }
.filter { padding: 10px 20px; border-radius: 999px; border: 1px solid var(--line); background: var(--panel); color: var(--muted); font-weight: 500; font-size: 0.9rem; transition: all 0.3s; }
.filter:hover { color: #fff; border-color: var(--line-strong); }
.filter.is-active { background: var(--grad); color: #050713; border-color: transparent; font-weight: 600; box-shadow: 0 8px 26px -10px rgba(70, 170, 255, 0.8); }
.product { padding: 0; display: flex; flex-direction: column; }
.product__visual { position: relative; height: 190px; display: grid; place-items: center; background: radial-gradient(circle at 50% 60%, rgba(60, 120, 255, 0.24), transparent 65%), linear-gradient(180deg, rgba(12, 18, 46, 0.9), rgba(6, 9, 24, 0.4)); border-bottom: 1px solid var(--line); overflow: hidden; }
.product__visual::before { content: ""; position: absolute; inset: 0; background-image: linear-gradient(rgba(120, 160, 255, 0.07) 1px, transparent 1px), linear-gradient(90deg, rgba(120, 160, 255, 0.07) 1px, transparent 1px); background-size: 26px 26px; }
.product__visual::after { content: ""; position: absolute; left: 0; right: 0; height: 46px; top: -46px; background: linear-gradient(180deg, transparent, rgba(53, 230, 255, 0.2)); border-bottom: 1px solid rgba(53, 230, 255, 0.7); animation: scan 4.2s linear infinite; animation-delay: var(--sd, 0s); }
.product__visual .icon { width: 92px; height: 92px; stroke-width: 0.9; color: #bfe9ff; filter: drop-shadow(0 0 14px rgba(53, 230, 255, 0.65)); position: relative; z-index: 1; transition: transform 0.6s var(--ease); animation: float 5s ease-in-out infinite; }
.product:hover .product__visual .icon { transform: scale(1.14) rotate(-4deg); }
.product__tag { position: absolute; top: 14px; left: 14px; z-index: 2; font-family: var(--font-mono); font-size: 0.64rem; letter-spacing: 0.16em; text-transform: uppercase; padding: 4px 10px; border-radius: 999px; background: rgba(6, 10, 28, 0.8); border: 1px solid var(--line-strong); color: var(--cyan); }
.product__tag--ind { color: var(--amber); border-color: rgba(255, 181, 71, 0.4); }
.product__tag--def { color: #8fb4ff; border-color: rgba(100, 150, 255, 0.5); }
.product__body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.product__body .chips { margin-top: auto; padding-top: 18px; }
.product.is-hidden { display: none; }
.product.is-in { animation: popIn 0.55s var(--ease) both; animation-delay: var(--pd, 0s); }

/* ---------- Đặc điểm / thông tin pháp lý ---------- */
.feature { display: flex; gap: 18px; padding: 22px 0; border-bottom: 1px solid var(--line); }
.feature:last-child { border-bottom: 0; }
.feature__icon { flex: none; width: 46px; height: 46px; border-radius: 12px; display: grid; place-items: center; color: var(--cyan); border: 1px solid var(--line-strong); background: rgba(53, 230, 255, 0.07); }
.feature h3 { font-size: 1.08rem; margin-bottom: 4px; }
.feature p { margin: 0; color: var(--muted); font-size: 0.94rem; }
.legal { border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; background: rgba(8, 11, 28, 0.6); margin: 0; }
.legal__row { display: grid; grid-template-columns: 200px 1fr; gap: 16px; padding: 18px 26px; border-bottom: 1px solid var(--line); }
.legal__row:last-child { border-bottom: 0; }
.legal__row dt { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--cyan); padding-top: 4px; }
.legal__row dd { margin: 0; }
.legal__row a:hover { color: var(--cyan); }

/* ---------- Liên hệ ---------- */
.contact-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 28px; align-items: start; }
.contact-list li { display: flex; gap: 16px; padding: 18px 0; border-bottom: 1px solid var(--line); }
.contact-list li:last-child { border-bottom: 0; }
.contact-list small { display: block; font-family: var(--font-mono); font-size: 0.68rem; letter-spacing: 0.18em; text-transform: uppercase; color: var(--muted); margin-bottom: 2px; }
.contact-list a:hover { color: var(--cyan); }
.form { display: grid; gap: 18px; }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.field label { display: block; font-size: 0.8rem; color: var(--muted); margin-bottom: 8px; font-weight: 500; }
.field input, .field textarea, .field select { width: 100%; padding: 14px 16px; border-radius: 12px; border: 1px solid var(--line); background: rgba(6, 9, 24, 0.7); color: #fff; font: inherit; transition: border-color 0.3s, box-shadow 0.3s, background 0.3s; }
.field select option { background: #0a0e22; }
.field textarea { min-height: 150px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus { outline: none; border-color: var(--cyan); box-shadow: 0 0 0 4px rgba(53, 230, 255, 0.12), 0 0 26px -8px rgba(53, 230, 255, 0.6); background: rgba(10, 16, 40, 0.9); }
.form__note { font-size: 0.82rem; color: var(--muted); margin: 0; }
.form__status { font-size: 0.9rem; margin: 0; min-height: 1.4em; }
.form__status.is-ok { color: #3dffa0; } .form__status.is-err { color: #ff7a8a; }
.map { position: relative; border-radius: 24px; overflow: hidden; border: 1px solid var(--line-strong); height: clamp(340px, 46vw, 500px); background: var(--bg-2); }
.map iframe { width: 100%; height: 100%; border: 0; display: block; filter: invert(0.92) hue-rotate(185deg) saturate(0.75) brightness(0.95) contrast(0.95); }
.map::after { content: ""; position: absolute; inset: 0; pointer-events: none; box-shadow: inset 0 0 90px rgba(4, 5, 13, 0.85); border-radius: inherit; }
.map__card { position: absolute; left: 20px; top: 20px; z-index: 2; max-width: 300px; padding: 16px 18px; border-radius: 14px; background: rgba(6, 10, 28, 0.86); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); border: 1px solid var(--line-strong); font-size: 0.86rem; }
.map__card strong { display: block; font-family: var(--font-head); font-size: 1rem; margin-bottom: 4px; }
.map__card > span { color: var(--muted); display: block; margin-bottom: 12px; }

/* ---------- Footer ---------- */
.site-footer { border-top: 1px solid var(--line); background: linear-gradient(180deg, rgba(6, 8, 22, 0.4), rgba(3, 4, 10, 0.95)); padding: 72px 0 0; position: relative; margin-top: 40px; overflow: hidden; }
.site-footer::before { content: ""; position: absolute; top: 0; left: 50%; width: min(520px, 70%); height: 1px; transform: translateX(-50%); background: linear-gradient(90deg, transparent, var(--cyan), transparent); box-shadow: 0 0 20px var(--cyan); }
.footer__grid { display: grid; grid-template-columns: 1.5fr 0.7fr 1.3fr; gap: 48px; }
.footer__grid h4 { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--cyan); margin-bottom: 20px; font-weight: 500; }
.footer__grid p { color: var(--muted); font-size: 0.92rem; }
.footer__links li { margin-bottom: 10px; color: var(--muted); font-size: 0.92rem; }
.footer__links a { transition: color 0.25s, padding 0.25s; }
.footer__links a:hover { color: var(--cyan); padding-left: 6px; }
.footer__contact li { display: flex; gap: 12px; margin-bottom: 12px; color: var(--muted); font-size: 0.92rem; }
.footer__contact .icon { color: var(--cyan); width: 1.2em; height: 1.2em; margin-top: 0.3em; }
.footer__contact a:hover { color: var(--cyan); }
.footer__bottom { margin-top: 56px; padding: 22px 0; border-top: 1px solid var(--line); display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; color: var(--muted); font-size: 0.82rem; }
.footer__mega { font-family: var(--font-logo); font-weight: 900; font-size: clamp(3rem, 14.5vw, 13rem); letter-spacing: 0.08em; line-height: 0.82; text-align: center; color: transparent; -webkit-text-stroke: 1px rgba(130, 170, 255, 0.18); user-select: none; margin: 30px 0 -0.08em; white-space: nowrap; }
.to-top { position: fixed; right: 22px; bottom: 22px; z-index: 90; width: 48px; height: 48px; border-radius: 50%; border: 1px solid var(--line-strong); background: rgba(6, 10, 28, 0.8); backdrop-filter: blur(10px); -webkit-backdrop-filter: blur(10px); display: grid; place-items: center; color: var(--cyan); opacity: 0; transform: translateY(20px); pointer-events: none; transition: all 0.35s var(--ease); }
.to-top.is-on { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { box-shadow: 0 0 26px -4px rgba(53, 230, 255, 0.8); }
.to-top .icon { transform: rotate(-90deg); }

/* ---------- 404 ---------- */
.error-page { min-height: 100vh; display: grid; place-items: center; text-align: center; padding: 120px 0 60px; }
.error-page .code { font-family: var(--font-logo); font-weight: 900; font-size: clamp(6rem, 24vw, 15rem); line-height: 1; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; animation: glitch 3.5s infinite; }

/* ---------- Keyframes ---------- */
@keyframes spin { to { transform: rotate(360deg); } }
@keyframes spinCenter { from { transform: translate(-50%, -50%) rotate(0); } to { transform: translate(-50%, -50%) rotate(360deg); } }
@keyframes rotateAngle { to { --angle: 360deg; } }
@keyframes gradShift { to { background-position: 200% center; } }
@keyframes pulse { 0%, 100% { opacity: 1; transform: scale(1); } 50% { opacity: 0.45; transform: scale(0.82); } }
@keyframes blink { 0%, 49% { opacity: 1; } 50%, 100% { opacity: 0; } }
@keyframes float { 0%, 100% { translate: 0 0; } 50% { translate: 0 -12px; } }
@keyframes hover { 0%, 100% { transform: translate(0, 0) rotate(-2deg); } 25% { transform: translate(8px, -14px) rotate(1.5deg); } 50% { transform: translate(-4px, -6px) rotate(3deg); } 75% { transform: translate(-10px, 8px) rotate(-1deg); } }
@keyframes drift { from { transform: translate(0, 0) scale(1); } to { transform: translate(6vw, 5vh) scale(1.18); } }
@keyframes shine { 0%, 60% { left: -60%; } 100% { left: 130%; } }
@keyframes marquee { to { transform: translateX(-50%); } }
@keyframes scan { to { top: 100%; } }
@keyframes ping { 0% { transform: scale(0.3); opacity: 0.9; } 100% { transform: scale(1); opacity: 0; } }
@keyframes scrollDot { 0% { transform: translateY(0); opacity: 1; } 70% { transform: translateY(13px); opacity: 0; } 100% { opacity: 0; } }
@keyframes wordIn { to { opacity: 1; transform: none; filter: blur(0); } }
@keyframes popIn { from { opacity: 0; scale: 0.94; } to { opacity: 1; scale: 1; } }
@keyframes planetGlow { from { box-shadow: 0 -2px 0 rgba(120, 200, 255, 0.5), 0 -18px 60px rgba(60, 150, 255, 0.4), 0 -60px 160px rgba(40, 110, 255, 0.28); } to { box-shadow: 0 -2px 0 rgba(150, 220, 255, 0.85), 0 -24px 80px rgba(60, 170, 255, 0.65), 0 -70px 190px rgba(50, 120, 255, 0.45); } }
@keyframes glitch { 0%, 92%, 100% { transform: none; filter: none; } 93% { transform: translate(-4px, 2px) skewX(-6deg); filter: hue-rotate(60deg); } 95% { transform: translate(5px, -2px) skewX(5deg); } 97% { transform: translate(-2px, 1px); filter: hue-rotate(-40deg); } }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .grid--3 { grid-template-columns: repeat(2, 1fr); }
  .process { grid-template-columns: repeat(2, 1fr); }
  .hero .container { grid-template-columns: 1fr; }
  .drone-stage { max-width: 460px; margin: 10px auto 0; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .footer__grid > :first-child { grid-column: 1 / -1; }
}
@media (max-width: 900px) {
  .nav-toggle { display: block; z-index: 2; }
  .nav { position: fixed; inset: 0; height: 100vh; height: 100dvh; flex-direction: column; justify-content: center; gap: 36px; background: rgba(4, 5, 13, 0.97); opacity: 0; visibility: hidden; transition: opacity 0.35s, visibility 0.35s; }
  .site-header.is-scrolled { backdrop-filter: none; -webkit-backdrop-filter: none; background: rgba(5, 7, 18, 0.94); }
  body.nav-open .nav { opacity: 1; visibility: visible; }
  body.nav-open { overflow: hidden; }
  .nav__list { flex-direction: column; align-items: center; gap: 6px; }
  .nav__link { font-family: var(--font-head); font-size: 1.6rem; color: #fff; opacity: 0; transform: translateY(20px); transition: opacity 0.4s, transform 0.4s var(--ease), color 0.25s; }
  body.nav-open .nav__link { opacity: 1; transform: none; }
  body.nav-open .nav__list li:nth-child(2) .nav__link { transition-delay: 0.06s; }
  body.nav-open .nav__list li:nth-child(3) .nav__link { transition-delay: 0.12s; }
  body.nav-open .nav__list li:nth-child(4) .nav__link { transition-delay: 0.18s; }
  body.nav-open .nav__list li:nth-child(5) .nav__link { transition-delay: 0.24s; }
  .nav__tools { flex-direction: column; }
  .split, .contact-grid { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .stat:nth-child(3)::before { display: none; }
  .stat:nth-child(n + 3) { border-top: 1px solid var(--line); }
  .legal__row { grid-template-columns: 1fr; gap: 4px; }
}
@media (max-width: 640px) {
  .container { padding: 0 18px; }
  .grid--2, .grid--3, .grid--4, .process, .form__row, .footer__grid { grid-template-columns: 1fr; }
  .hero { padding-bottom: 100px; }
  .hero__meta { gap: 20px; }
  .hud-tag { font-size: 0.6rem; padding: 6px 9px; }
  .hud-tag b { font-size: 0.8rem; }
  .hud-tag--2 { right: 0; }
  .btn { padding: 13px 22px; }
  .map__card { position: static; max-width: none; border-radius: 0; border: 0; border-bottom: 1px solid var(--line); }
  .map { height: auto; }
  .map iframe { height: 340px; }
  .scroll-hint { display: none; }
}
@media (hover: none) { .cursor-glow, .cursor-ring { display: none; } }
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001s !important; animation-iteration-count: 1 !important; transition-duration: 0.001s !important; scroll-behavior: auto !important; }
  .reveal, .split-words .w { opacity: 1 !important; translate: none !important; scale: none !important; transform: none !important; filter: none !important; }
  .rotor-blade { animation: none !important; }
}