:root {
  --bg: #0a1220;
  --bg-elevated: #101a2c;
  --ink: #e8eef8;
  --muted: #93a4bd;
  --accent: #2ee6a6;
  --accent-2: #3db4ff;
  --line: rgba(148, 178, 220, 0.18);
  --font-display: "Orbitron", "Noto Sans SC", sans-serif;
  --font-body: "Noto Sans SC", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: var(--font-body);
  background: var(--bg);
  line-height: 1.65;
}

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

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(61, 180, 255, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, rgba(61, 180, 255, 0.05) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 20%, black 20%, transparent 75%);
}

.bg-glow {
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse 60% 40% at 70% 10%, rgba(46, 230, 166, 0.16), transparent 60%),
    radial-gradient(ellipse 50% 35% at 15% 30%, rgba(61, 180, 255, 0.14), transparent 55%);
  pointer-events: none;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.9rem 6vw;
  backdrop-filter: blur(12px);
  background: rgba(10, 18, 32, 0.78);
  border-bottom: 1px solid var(--line);
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-weight: 700;
}

.logo-mark {
  display: grid;
  place-items: center;
  width: 2rem;
  height: 2rem;
  border-radius: 0.45rem;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #041018;
  font-size: 0.95rem;
}

.logo-text {
  font-family: var(--font-display);
  letter-spacing: 0.04em;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem 1.25rem;
  font-size: 0.92rem;
  color: var(--muted);
}

.nav-links a:hover {
  color: var(--ink);
}

.hero {
  position: relative;
  min-height: calc(100vh - 64px);
  display: grid;
  align-content: center;
  padding: 4.5rem 6vw 5rem;
  overflow: hidden;
}

.hero-brand {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 7vw, 4.6rem);
  line-height: 1.05;
  letter-spacing: 0.06em;
  background: linear-gradient(90deg, #fff, var(--accent) 55%, var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  animation: brand-in 0.9s ease both;
}

.hero-title {
  margin: 0;
  max-width: 14ch;
  font-size: clamp(1.35rem, 3.2vw, 2rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  animation: rise 0.8s 0.15s ease both;
}

.hero-desc {
  margin: 1rem 0 0;
  max-width: 34rem;
  color: var(--muted);
  font-size: 1.05rem;
  animation: rise 0.8s 0.28s ease both;
}

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.75rem;
  animation: rise 0.8s 0.4s ease both;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.75rem;
  padding: 0 1.25rem;
  border-radius: 0.55rem;
  font-weight: 600;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent), #1ecf95);
  color: #041018;
  box-shadow: 0 10px 30px rgba(46, 230, 166, 0.25);
}

.btn-ghost {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.03);
  color: var(--ink);
}

.hero-visual {
  position: absolute;
  right: 6vw;
  top: 50%;
  translate: 0 -50%;
  width: min(340px, 34vw);
  aspect-ratio: 1;
  pointer-events: none;
}

.arena {
  position: relative;
  width: 100%;
  height: 100%;
  display: grid;
  place-items: center;
}

.ring {
  position: absolute;
  inset: 12%;
  border-radius: 50%;
  border: 1px solid rgba(46, 230, 166, 0.35);
  animation: spin 18s linear infinite;
}

.ring-2 {
  inset: 0;
  border-color: rgba(61, 180, 255, 0.28);
  animation-duration: 28s;
  animation-direction: reverse;
}

.core {
  width: 5.5rem;
  height: 5.5rem;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-family: var(--font-display);
  font-size: 1.1rem;
  letter-spacing: 0.08em;
  color: #041018;
  background: linear-gradient(145deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 40px rgba(46, 230, 166, 0.35);
  animation: pulse 2.8s ease-in-out infinite;
}

.section {
  padding: 4.5rem 6vw;
}

.section-alt {
  background: linear-gradient(180deg, rgba(16, 26, 44, 0.85), rgba(10, 18, 32, 0.4));
  border-block: 1px solid var(--line);
}

.section h2 {
  margin: 0;
  font-size: clamp(1.5rem, 3vw, 2rem);
}

.section-lead {
  margin: 0.75rem 0 0;
  max-width: 40rem;
  color: var(--muted);
}

.feature-list {
  list-style: none;
  margin: 2rem 0 0;
  padding: 0;
  display: grid;
  gap: 1rem;
}

.feature-list li {
  display: grid;
  gap: 0.25rem;
  padding: 1.1rem 1.2rem;
  border-left: 3px solid var(--accent);
  background: rgba(255, 255, 255, 0.03);
}

.feature-list strong {
  font-size: 1.05rem;
}

.feature-list span {
  color: var(--muted);
  font-size: 0.95rem;
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
  margin-top: 2rem;
}

.service-grid article {
  padding: 1.35rem 1.25rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: rgba(255, 255, 255, 0.025);
  transition: border-color 0.25s ease, transform 0.25s ease;
}

.service-grid article:hover {
  border-color: rgba(46, 230, 166, 0.45);
  transform: translateY(-2px);
}

.service-grid h3 {
  margin: 0 0 0.5rem;
  font-size: 1.1rem;
}

.service-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.company-card {
  margin: 2rem 0 0;
  padding: 1.5rem;
  border: 1px solid var(--line);
  border-radius: 0.85rem;
  background: var(--bg-elevated);
  display: grid;
  gap: 1rem;
}

.company-card div {
  display: grid;
  gap: 0.2rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line);
}

.company-card div:last-child {
  padding-bottom: 0;
  border-bottom: 0;
}

.company-card dt {
  color: var(--muted);
  font-size: 0.85rem;
}

.company-card dd {
  margin: 0;
  font-weight: 500;
  word-break: break-all;
}

.contact-box {
  margin-top: 1.75rem;
  display: grid;
  gap: 0.75rem;
  max-width: 36rem;
}

.contact-box p {
  margin: 0;
  display: grid;
  grid-template-columns: 6.5rem 1fr;
  gap: 0.75rem;
}

.contact-box span {
  color: var(--muted);
}

.legal-links {
  display: flex;
  gap: 1.25rem;
  margin-top: 1.75rem;
}

.legal-links a {
  color: var(--accent-2);
  text-decoration: underline;
  text-underline-offset: 3px;
}

.footer {
  padding: 2rem 6vw 2.5rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.9rem;
}

.footer p {
  margin: 0.25rem 0;
}

.beian a {
  color: var(--muted);
}

.page {
  max-width: 720px;
  margin: 0 auto;
  padding: 3rem 6vw 4rem;
}

.page h1 {
  margin: 0 0 1rem;
  font-size: 1.75rem;
}

.page h2 {
  margin: 2rem 0 0.75rem;
  font-size: 1.2rem;
}

.page p,
.page li {
  color: var(--muted);
}

.back {
  display: inline-block;
  margin-bottom: 1.5rem;
  color: var(--accent-2);
}

@keyframes brand-in {
  from {
    opacity: 0;
    transform: translateY(18px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes pulse {
  0%,
  100% {
    box-shadow: 0 0 28px rgba(46, 230, 166, 0.28);
  }
  50% {
    box-shadow: 0 0 48px rgba(61, 180, 255, 0.45);
  }
}

@media (max-width: 900px) {
  .hero-visual {
    display: none;
  }

  .service-grid {
    grid-template-columns: 1fr;
  }

  .contact-box p {
    grid-template-columns: 1fr;
    gap: 0.15rem;
  }
}

@media (max-width: 640px) {
  .nav-links {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 3.5rem;
  }
}