:root {
  --bg: #070b14;
  --surface: rgba(15, 27, 45, 0.72);
  --surface-strong: rgba(12, 21, 36, 0.95);
  --line: rgba(95, 174, 255, 0.35);
  --line-soft: rgba(95, 174, 255, 0.14);
  --text: #eef5ff;
  --muted: #a9bed8;
  --primary: #00d1ff;
  --primary-dark: #0389b7;
  --highlight: #5bffcc;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
  background-color: #04070f;
  background-image:
    radial-gradient(1200px 760px at 12% 10%, rgba(37, 98, 175, 0.42) 0%, rgba(37, 98, 175, 0) 64%),
    radial-gradient(980px 680px at 88% 18%, rgba(0, 174, 224, 0.24) 0%, rgba(0, 174, 224, 0) 62%),
    radial-gradient(1200px 820px at 48% 105%, rgba(7, 124, 148, 0.26) 0%, rgba(7, 124, 148, 0) 66%),
    linear-gradient(160deg, #03060d 0%, #081425 44%, #060f1d 72%, #02050d 100%);
  background-repeat: no-repeat;
  background-attachment: fixed;
  color: var(--text);
  line-height: 1.75;
}

a {
  color: inherit;
  text-decoration: none;
}

.bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 36px 36px;
  mask-image: radial-gradient(circle at center, black 26%, transparent 85%);
  pointer-events: none;
  z-index: -2;
}

.bg-lines-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: -1;
  opacity: 0.78;
}

.container {
  width: min(1240px, 92vw);
  margin: 0 auto;
}

@media (min-width: 1600px) {
  .container {
    width: min(1560px, 90vw);
  }
}

@media (min-width: 2200px) {
  .container {
    width: min(1780px, 88vw);
  }
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(12px);
  background: rgba(5, 11, 24, 0.76);
  border-bottom: 1px solid rgba(133, 200, 255, 0.18);
}

.nav-wrap {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
}

.brand-mark {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  border: 1px solid var(--line);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: linear-gradient(135deg, rgba(0, 209, 255, 0.25), rgba(91, 255, 204, 0.2));
  box-shadow: 0 0 0 1px rgba(0, 199, 255, 0.12), 0 8px 18px rgba(0, 0, 0, 0.28);
}

.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  filter: saturate(1.05) contrast(1.03);
}

.brand-text {
  font-size: 1.08rem;
}

.main-nav {
  display: flex;
  gap: 24px;
  color: #d6e8ff;
  font-size: 0.95rem;
}

.main-nav a {
  position: relative;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--primary), var(--highlight));
  transition: transform 0.26s ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.menu-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(10, 20, 35, 0.85);
  color: var(--text);
  padding: 7px 14px;
  border-radius: 999px;
}

.hero {
  padding: 88px 0 70px;
}

.hero-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 34px;
  align-items: stretch;
}

.eyebrow {
  font-family: "Orbitron", sans-serif;
  letter-spacing: 0.14em;
  color: #9adfff;
  font-size: 0.78rem;
  margin: 0 0 10px;
}

.hero h1 {
  font-size: clamp(2rem, 4vw, 3.4rem);
  line-height: 1.2;
  margin: 0;
  max-width: 16ch;
}

.lead {
  color: var(--muted);
  margin-top: 18px;
  max-width: 58ch;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 120px;
  padding: 10px 20px;
  border-radius: 12px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary), #11b6f2 62%, var(--highlight));
  color: #03121a;
  box-shadow: 0 12px 28px rgba(0, 187, 255, 0.3);
}

.btn-secondary {
  background: rgba(11, 23, 40, 0.8);
  border-color: var(--line);
}

.hero-panel {
  background: linear-gradient(160deg, rgba(12, 29, 52, 0.9), rgba(9, 18, 33, 0.95));
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 24px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 14px;
}

.metric-card {
  padding: 16px;
  border-radius: 14px;
  border: 1px solid rgba(149, 206, 255, 0.22);
  background: rgba(3, 13, 26, 0.54);
}

.metric-card p {
  margin: 0;
  color: #97b6d7;
  font-size: 0.9rem;
}

.metric-card h3 {
  margin: 6px 0 0;
  font-size: 1.1rem;
}

.section {
  padding: 70px 0;
}

.section.accent {
  background: linear-gradient(180deg, rgba(14, 30, 52, 0.28), rgba(9, 15, 27, 0.3));
}

.section-title {
  margin-bottom: 26px;
}

.section-title p {
  margin: 0;
  color: #8fd6f7;
  font-family: "Orbitron", sans-serif;
  letter-spacing: 0.13em;
  font-size: 0.76rem;
}

.section-title h2 {
  margin: 8px 0 0;
  font-size: clamp(1.5rem, 2.7vw, 2.2rem);
}

.about-grid,
.product-grid,
.adv-grid {
  display: grid;
  gap: 16px;
}

.about-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.product-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.adv-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.glass-card,
.feature-card,
.adv-card,
.contact-card,
.timeline {
  background: var(--surface);
  border: 1px solid rgba(148, 211, 255, 0.2);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.glass-card,
.feature-card,
.adv-card {
  padding: 22px;
}

.glass-card h3,
.feature-card h3,
.adv-card h3 {
  margin-top: 0;
  margin-bottom: 8px;
}

.glass-card p,
.feature-card p,
.adv-card p {
  margin: 0;
  color: var(--muted);
}

.feature-card ul {
  margin: 14px 0 0;
  padding-left: 18px;
  color: #d6ebff;
}

.feature-card li {
  margin-top: 6px;
}

.timeline {
  padding: 20px;
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
}

.step {
  position: relative;
  padding: 14px;
  border-radius: 13px;
  border: 1px solid rgba(143, 206, 255, 0.2);
  background: rgba(7, 15, 28, 0.72);
}

.step span {
  display: inline-grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 999px;
  border: 1px solid var(--line);
  color: #89e9ff;
  font-family: "Orbitron", sans-serif;
}

.step h3 {
  margin: 12px 0 6px;
}

.step p {
  margin: 0;
  color: var(--muted);
}

.contact {
  padding-bottom: 84px;
}

.contact-wrap {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
  align-items: stretch;
}

.contact-wrap h2 {
  margin: 4px 0 12px;
}

.contact-wrap p {
  color: var(--muted);
}

.contact-card {
  padding: 24px;
  background: var(--surface-strong);
}

.contact-card p {
  margin: 8px 0;
  color: #d6ebff;
}

.contact-card .btn {
  margin-top: 12px;
}

.site-footer {
  border-top: 1px solid rgba(145, 207, 255, 0.2);
  background: rgba(4, 9, 17, 0.9);
}

.site-footer .container {
  min-height: 68px;
  padding: 14px 0;
  display: grid;
  gap: 2px;
  place-items: center;
  text-align: center;
}

.site-footer p {
  margin: 0;
  color: #a4bedb;
  font-size: 0.9rem;
}

.site-footer p + p {
  color: #86a8cf;
  font-size: 0.82rem;
}

.site-footer a {
  color: inherit;
  text-decoration: none;
  border-bottom: 1px dashed rgba(138, 170, 207, 0.75);
}

.site-footer a:hover,
.site-footer a:focus-visible {
  color: #c9e6ff;
  border-bottom-color: #c9e6ff;
}

.reveal,
.reveal-delay {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal-delay {
  transition-delay: 0.15s;
}

.reveal.is-visible,
.reveal-delay.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1024px) {
  .about-grid,
  .adv-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .timeline {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 820px) {
  .hero-layout,
  .contact-wrap,
  .product-grid {
    grid-template-columns: 1fr;
  }

  .menu-toggle {
    display: inline-flex;
  }

  .main-nav {
    position: absolute;
    top: 74px;
    left: 0;
    right: 0;
    flex-direction: column;
    gap: 0;
    background: rgba(6, 13, 24, 0.98);
    border-bottom: 1px solid rgba(145, 207, 255, 0.28);
    transform-origin: top;
    transform: scaleY(0);
    opacity: 0;
    transition: transform 0.22s ease, opacity 0.22s ease;
    pointer-events: none;
  }

  .main-nav a {
    padding: 14px 4vw;
    border-top: 1px solid rgba(127, 192, 255, 0.15);
  }

  .main-nav.open {
    transform: scaleY(1);
    opacity: 1;
    pointer-events: auto;
  }

  .main-nav a::after {
    display: none;
  }
}

@media (max-width: 620px) {
  .hero {
    padding-top: 72px;
  }

  .about-grid,
  .adv-grid,
  .timeline {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 56px 0;
  }

  .hero h1 {
    max-width: 100%;
  }
}