:root {
  --bg: #03060b;
  --bg-2: #070c16;
  --card: rgba(12, 20, 36, 0.72);
  --accent: #00e5ff;
  --accent-2: #0066ff;
  --accent-3: #7c3aed;
  --text: #e8f4ff;
  --muted: #9ab3cf;
  --border: rgba(0, 229, 255, 0.16);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
}

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

.container {
  width: 92%;
  max-width: 1180px;
  margin: 0 auto;
}

/* Header */
header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 1000;
  background: rgba(3, 6, 11, 0.72);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 74px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 1px;
}

.logo svg {
  width: 40px;
  height: 40px;
  filter: drop-shadow(0 0 10px rgba(0, 229, 255, 0.45));
}

.logo span {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

nav ul {
  display: flex;
  gap: 38px;
  list-style: none;
}

nav a {
  font-size: 0.95rem;
  color: var(--muted);
  transition: color 0.25s;
  position: relative;
}

nav a:hover,
nav a.active {
  color: var(--accent);
}

nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 8px var(--accent);
  transition: width 0.25s;
}

nav a:hover::after,
nav a.active::after {
  width: 100%;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  cursor: pointer;
}

.menu-toggle span {
  width: 26px;
  height: 2px;
  background: var(--accent);
  transition: transform 0.3s;
  box-shadow: 0 0 6px var(--accent);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding-top: 74px;
  background:
    radial-gradient(circle at 15% 30%, rgba(0, 229, 255, 0.14) 0%, transparent 42%),
    radial-gradient(circle at 85% 70%, rgba(0, 102, 255, 0.14) 0%, transparent 42%),
    radial-gradient(circle at 50% 50%, rgba(124, 58, 237, 0.08) 0%, transparent 50%),
    var(--bg);
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0, 229, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 255, 0.035) 1px, transparent 1px);
  background-size: 70px 70px;
  mask-image: radial-gradient(circle at center, black 25%, transparent 75%);
  -webkit-mask-image: radial-gradient(circle at center, black 25%, transparent 75%);
  pointer-events: none;
}

#heroCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 880px;
  padding: 0 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 30px;
  border: 1px solid var(--border);
  background: rgba(0, 229, 255, 0.06);
  color: var(--accent);
  font-size: 0.85rem;
  margin-bottom: 28px;
  backdrop-filter: blur(6px);
}

.hero-badge::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: pulse 2s infinite;
}

.hero h1 {
  font-size: clamp(2.2rem, 5.5vw, 3.8rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 26px;
  background: linear-gradient(135deg, #fff 0%, var(--accent) 50%, var(--accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  text-shadow: 0 0 40px rgba(0, 229, 255, 0.18);
}

.hero p {
  font-size: 1.15rem;
  color: var(--muted);
  max-width: 720px;
  margin: 0 auto 42px;
}

.hero-btns {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 15px 34px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 0.95rem;
  transition: transform 0.2s, box-shadow 0.2s;
  position: relative;
  overflow: hidden;
}

.btn-primary {
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  color: #000;
  box-shadow: 0 6px 32px rgba(0, 229, 255, 0.3);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 12px 44px rgba(0, 229, 255, 0.4);
}

.btn-primary::before {
  content: "";
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.35), transparent);
  transition: left 0.5s;
}

.btn-primary:hover::before {
  left: 100%;
}

.btn-secondary {
  border: 1px solid var(--border);
  color: var(--accent);
  background: rgba(0, 229, 255, 0.05);
}

.btn-secondary:hover {
  background: rgba(0, 229, 255, 0.14);
  box-shadow: 0 0 24px rgba(0, 229, 255, 0.15);
}

/* Sections */
section {
  padding: 120px 0;
  position: relative;
}

section:nth-child(even) {
  background:
    radial-gradient(circle at 10% 20%, rgba(0, 102, 255, 0.06) 0%, transparent 40%),
    radial-gradient(circle at 90% 80%, rgba(0, 229, 255, 0.05) 0%, transparent 40%),
    var(--bg-2);
}

.section-title {
  font-size: 2.1rem;
  font-weight: 700;
  margin-bottom: 18px;
  text-align: center;
}

.section-title span {
  color: var(--accent);
  text-shadow: 0 0 20px rgba(0, 229, 255, 0.25);
}

.section-sub {
  text-align: center;
  color: var(--muted);
  max-width: 640px;
  margin: 0 auto 66px;
}

/* About */
.about-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 70px;
  align-items: center;
}

.about-text p {
  color: var(--muted);
  margin-bottom: 22px;
  font-size: 1.05rem;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.stat-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 30px;
  text-align: center;
  backdrop-filter: blur(12px);
  overflow: hidden;
}

.stat-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,229,255,0.08), transparent 50%);
  pointer-events: none;
}

.stat-card h3 {
  font-size: 2.2rem;
  color: var(--accent);
  margin-bottom: 8px;
  text-shadow: 0 0 18px rgba(0, 229, 255, 0.25);
}

.stat-card p {
  color: var(--muted);
  font-size: 0.9rem;
}

/* Services */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 38px 28px;
  transition: transform 0.35s, border-color 0.35s, box-shadow 0.35s;
  backdrop-filter: blur(12px);
  overflow: hidden;
}

.service-card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 20px;
  padding: 1px;
  background: linear-gradient(135deg, rgba(0,229,255,0.35), transparent 40%, transparent 60%, rgba(0,102,255,0.25));
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.35s;
  pointer-events: none;
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 229, 255, 0.35);
  box-shadow: 0 18px 50px rgba(0, 229, 255, 0.12);
}

.service-card:hover::before {
  opacity: 1;
}

.service-icon {
  width: 54px;
  height: 54px;
  margin-bottom: 24px;
  color: var(--accent);
  filter: drop-shadow(0 0 8px rgba(0, 229, 255, 0.35));
}

.service-card h3 {
  font-size: 1.18rem;
  margin-bottom: 14px;
}

.service-card p {
  color: var(--muted);
  font-size: 0.93rem;
}

/* Contact */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}

.contact-card {
  position: relative;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 30px;
  display: flex;
  gap: 20px;
  align-items: flex-start;
  backdrop-filter: blur(12px);
  transition: transform 0.25s, box-shadow 0.25s;
}

.contact-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 36px rgba(0, 229, 255, 0.1);
}

.contact-icon {
  width: 46px;
  height: 46px;
  flex-shrink: 0;
  color: var(--accent);
  filter: drop-shadow(0 0 6px rgba(0, 229, 255, 0.3));
}

.contact-card h4 {
  font-size: 1.05rem;
  margin-bottom: 8px;
}

.contact-card p {
  color: var(--muted);
  font-size: 0.95rem;
}

/* Footer */
footer {
  border-top: 1px solid var(--border);
  padding: 42px 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
  background: var(--bg);
}

footer a {
  color: var(--accent);
  transition: opacity 0.2s;
}

footer a:hover {
  opacity: 0.8;
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Keyframes */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

/* Responsive */
@media (max-width: 900px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 640px) {
  nav ul {
    position: fixed;
    top: 74px;
    right: -100%;
    width: 230px;
    height: calc(100vh - 74px);
    flex-direction: column;
    gap: 0;
    background: rgba(3, 6, 11, 0.96);
    border-left: 1px solid var(--border);
    padding: 20px 0;
    transition: right 0.3s;
  }

  nav ul.open {
    right: 0;
  }

  nav li a {
    display: block;
    padding: 16px 28px;
  }

  .menu-toggle {
    display: flex;
  }

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

  .hero h1 {
    font-size: 2.1rem;
  }
}