:root {
  --bg: #0a0e1a;
  --bg-soft: #0f1526;
  --surface: #141b30;
  --surface-2: #1a2238;
  --text: #e9edf6;
  --text-dim: #9aa6c0;
  --brand: #4f7cff;
  --brand-2: #9b5cff;
  --accent: #38e1c9;
  --border: rgba(255, 255, 255, 0.08);
  --radius: 16px;
  --container: 1160px;
  --grad: linear-gradient(120deg, #4f7cff, #9b5cff);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.45);
  --font: "Segoe UI", "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, Roboto, Helvetica, Arial, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  overflow-x: hidden;
  font-size: 16px;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 13px 28px; border-radius: 999px; font-weight: 600; font-size: 15px;
  cursor: pointer; border: 1px solid transparent; transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
  white-space: nowrap;
}
.btn--primary { background: var(--grad); color: #fff; box-shadow: 0 10px 30px rgba(79, 124, 255, 0.4); }
.btn--primary:hover { transform: translateY(-2px); box-shadow: 0 16px 40px rgba(79, 124, 255, 0.55); }
.btn--ghost { background: rgba(255, 255, 255, 0.04); color: var(--text); border-color: var(--border); }
.btn--ghost:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-2px); }

/* Navbar */
.nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  transition: background .3s ease, border-color .3s ease, backdrop-filter .3s ease;
  border-bottom: 1px solid transparent;
}
.nav.is-scrolled {
  background: rgba(10, 14, 26, 0.82);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--border);
}
.nav__inner { display: flex; align-items: center; justify-content: space-between; height: 70px; }
.nav__brand { display: flex; align-items: center; gap: 12px; }
.nav__name { display: flex; flex-direction: column; line-height: 1.1; }
.nav__name strong { font-size: 17px; letter-spacing: 1px; }
.nav__name em { font-style: normal; font-size: 11px; letter-spacing: 3px; color: var(--text-dim); }
.nav__links { display: flex; align-items: center; gap: 30px; }
.nav__links a { font-size: 15px; color: var(--text-dim); transition: color .2s ease; position: relative; }
.nav__links a:hover { color: var(--text); }
.lang-toggle {
  background: rgba(255, 255, 255, 0.06); color: var(--text); border: 1px solid var(--border);
  padding: 7px 14px; border-radius: 999px; font-size: 13px; font-weight: 600; cursor: pointer;
  transition: background .2s ease; letter-spacing: 1px;
}
.lang-toggle:hover { background: rgba(255, 255, 255, 0.14); }
.nav__burger { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav__burger span { width: 24px; height: 2px; background: var(--text); border-radius: 2px; transition: transform .3s ease, opacity .3s ease; }
.nav__burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero { position: relative; padding: 160px 0 110px; overflow: hidden; }
.hero__bg { position: absolute; inset: 0; z-index: 0; }
.orb { position: absolute; border-radius: 50%; filter: blur(80px); opacity: .55; }
.orb--1 { width: 480px; height: 480px; background: var(--brand); top: -120px; right: -80px; animation: float 14s ease-in-out infinite; }
.orb--2 { width: 420px; height: 420px; background: var(--brand-2); bottom: -160px; left: -100px; animation: float 18s ease-in-out infinite reverse; }
.grid-overlay {
  position: absolute; inset: 0;
  background-image: linear-gradient(rgba(255,255,255,.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 35%, #000 40%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 35%, #000 40%, transparent 100%);
}
@keyframes float { 0%,100% { transform: translate(0,0); } 50% { transform: translate(20px, 30px); } }
.hero__inner { position: relative; z-index: 1; text-align: center; max-width: 860px; margin: 0 auto; }
.hero__eyebrow { color: var(--text-dim); letter-spacing: 2px; font-size: 14px; margin-bottom: 22px; }
.hero__title { font-size: clamp(36px, 6vw, 68px); line-height: 1.12; font-weight: 800; letter-spacing: -1px; }
.hero__title { background: linear-gradient(120deg, #fff 30%, #b8c4ff 70%, #d6b8ff); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__sub { color: var(--text-dim); font-size: clamp(16px, 2vw, 19px); margin: 26px auto 38px; max-width: 640px; }
.hero__cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero__stats { display: flex; gap: 50px; justify-content: center; margin-top: 64px; flex-wrap: wrap; }
.hero__stats dt { font-size: 38px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.hero__stats dd { color: var(--text-dim); font-size: 14px; margin-top: 4px; }

/* Sections */
.section { padding: 100px 0; position: relative; }
.section--alt { background: var(--bg-soft); }
.section__head { text-align: center; max-width: 720px; margin: 0 auto 60px; }
.kicker {
  display: inline-block; font-size: 13px; letter-spacing: 2px; text-transform: uppercase;
  color: var(--brand); font-weight: 700; margin-bottom: 14px;
  padding: 5px 14px; border: 1px solid rgba(79,124,255,.3); border-radius: 999px; background: rgba(79,124,255,.08);
}
.section__title { font-size: clamp(28px, 4vw, 42px); font-weight: 800; letter-spacing: -.5px; }
.section__desc { color: var(--text-dim); margin-top: 16px; font-size: 17px; }

/* About */
.about__grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: start; }
.about__lead p { color: var(--text-dim); font-size: 17px; margin-bottom: 18px; }
.about__lead p:first-child { color: var(--text); font-size: 18px; }
.about__values { list-style: none; display: grid; gap: 18px; }
.about__values li {
  display: grid; grid-template-columns: auto 1fr; column-gap: 14px; row-gap: 2px;
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px;
  transition: transform .25s ease, border-color .25s ease;
}
.about__values li:hover { transform: translateX(6px); border-color: rgba(79,124,255,.4); }
.about__values .dot { width: 10px; height: 10px; border-radius: 50%; background: var(--grad); margin-top: 8px; grid-row: span 2; }
.about__values strong { font-size: 16px; }
.about__values em { font-style: normal; color: var(--text-dim); font-size: 14px; }

/* Cards (Business) */
.cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 26px;
  transition: transform .3s ease, border-color .3s ease, box-shadow .3s ease; position: relative; overflow: hidden;
}
.card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--grad);
  transform: scaleX(0); transform-origin: left; transition: transform .3s ease;
}
.card:hover { transform: translateY(-8px); border-color: rgba(79,124,255,.4); box-shadow: var(--shadow); }
.card:hover::before { transform: scaleX(1); }
.card__icon { font-size: 34px; margin-bottom: 16px; }
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--text-dim); font-size: 14.5px; }

/* Solutions */
.solutions { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }
.solution {
  background: linear-gradient(160deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border); border-radius: var(--radius); padding: 30px 32px;
  transition: transform .3s ease, border-color .3s ease; position: relative;
}
.solution::after {
  content: "→"; position: absolute; top: 28px; right: 30px; color: var(--brand);
  opacity: 0; transform: translateX(-6px); transition: all .3s ease; font-size: 20px;
}
.solution:hover { transform: translateY(-5px); border-color: rgba(155,92,255,.4); }
.solution:hover::after { opacity: 1; transform: translateX(0); }
.solution h3 { font-size: 20px; margin-bottom: 10px; }
.solution p { color: var(--text-dim); font-size: 15px; }

/* Why */
.why__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.why__item { padding: 30px 24px; border-radius: var(--radius); border: 1px solid var(--border); background: var(--surface); }
.why__num { font-size: 30px; font-weight: 800; background: var(--grad); -webkit-background-clip: text; background-clip: text; color: transparent; }
.why__item h3 { font-size: 18px; margin: 14px 0 8px; }
.why__item p { color: var(--text-dim); font-size: 14.5px; }

/* CTA band */
.cta-band { padding: 80px 0; background: var(--grad); position: relative; overflow: hidden; }
.cta-band::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(circle at 20% 30%, rgba(255,255,255,.15), transparent 40%), radial-gradient(circle at 80% 70%, rgba(255,255,255,.12), transparent 40%);
}
.cta-band__inner { position: relative; text-align: center; color: #fff; }
.cta-band h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; }
.cta-band p { margin: 14px auto 28px; max-width: 560px; opacity: .92; }
.cta-band .btn--primary { background: #fff; color: var(--brand); box-shadow: 0 12px 30px rgba(0,0,0,.25); }
.cta-band .btn--primary:hover { box-shadow: 0 18px 40px rgba(0,0,0,.35); }

/* Contact */
.contact__grid { display: grid; grid-template-columns: 1fr 1.15fr; gap: 48px; align-items: start; }
.contact__info ul { list-style: none; display: grid; gap: 22px; }
.contact__info li { display: grid; gap: 4px; padding-bottom: 18px; border-bottom: 1px solid var(--border); }
.contact__label { font-size: 13px; color: var(--text-dim); letter-spacing: 1px; }
.contact__info a:hover { color: var(--brand); }
.contact__form { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 30px; display: grid; gap: 18px; }
.field { display: grid; gap: 7px; }
.field label { font-size: 14px; color: var(--text-dim); }
.field input, .field textarea {
  background: var(--bg); border: 1px solid var(--border); border-radius: 10px; padding: 12px 14px;
  color: var(--text); font-family: inherit; font-size: 15px; transition: border-color .2s ease;
  resize: vertical;
}
.field input:focus, .field textarea:focus { outline: none; border-color: var(--brand); }
.field input:invalid:not(:placeholder-shown) { border-color: #ff6b6b; }
.form__hint { font-size: 13px; color: var(--text-dim); }
.form__hint.is-ok { color: var(--accent); }

/* Footer */
.footer { background: var(--bg-soft); border-top: 1px solid var(--border); padding-top: 50px; }
.footer__inner { display: flex; justify-content: space-between; gap: 40px; flex-wrap: wrap; padding-bottom: 36px; }
.footer__brand { display: flex; gap: 14px; align-items: center; }
.footer__brand strong { font-size: 16px; }
.footer__brand p { color: var(--text-dim); font-size: 13px; }
.footer__links { display: flex; gap: 28px; align-items: center; flex-wrap: wrap; }
.footer__links a { color: var(--text-dim); font-size: 14px; transition: color .2s ease; }
.footer__links a:hover { color: var(--text); }
.footer__bar { border-top: 1px solid var(--border); padding: 22px 0; }
.footer__bar-inner { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; color: var(--text-dim); font-size: 13px; }
.footer__bar a:hover { color: var(--text); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity .7s ease, transform .7s ease; }
.reveal.is-visible { opacity: 1; transform: none; }

/* Responsive */
@media (max-width: 920px) {
  .about__grid { grid-template-columns: 1fr; gap: 32px; }
  .cards, .why__grid { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: 1fr; gap: 32px; }
}
@media (max-width: 760px) {
  .nav__links {
    position: fixed; top: 70px; right: 0; left: 0; flex-direction: column; gap: 8px;
    background: rgba(10,14,26,.97); backdrop-filter: blur(14px); padding: 20px 24px 28px;
    border-bottom: 1px solid var(--border); transform: translateY(-130%); transition: transform .35s ease;
    align-items: stretch;
  }
  .nav__links.is-open { transform: translateY(0); }
  .nav__links a { padding: 10px 0; font-size: 16px; }
  .lang-toggle { align-self: flex-start; }
  .nav__burger { display: flex; }
  .hero { padding: 130px 0 80px; }
  .hero__stats { gap: 32px; }
  .solutions { grid-template-columns: 1fr; }
  .section { padding: 72px 0; }
}
@media (max-width: 520px) {
  .cards, .why__grid { grid-template-columns: 1fr; }
  .footer__inner { flex-direction: column; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; }
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; }
}