body {
  margin: 0;
  font-family: 'Orbitron', 'Segoe UI', Arial, sans-serif;
  background: #0a1833;
  color: #fff;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}
#particles-js {
  position: fixed;
  width: 100vw;
  height: 100vh;
  z-index: 0;
  top: 0;
  left: 0;
}
.header {
  position: sticky;
  top: 0;
  width: 100%;
  background: rgba(10, 24, 51, 0.95);
  z-index: 10;
  box-shadow: 0 2px 16px 0 rgba(0,0,0,0.2);
}
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.logo {
  font-size: 2rem;
  font-weight: bold;
  letter-spacing: 2px;
  color: #3ec6ff;
  padding: 16px 0;
  display: inline-block;
}
.nav {
  float: right;
  padding: 24px 0 0 0;
}
.nav a {
  color: #fff;
  text-decoration: none;
  margin-left: 32px;
  font-size: 1.1rem;
  transition: color 0.2s;
  position: relative;
}
.nav a::after {
  content: '';
  display: block;
  width: 0;
  height: 2px;
  background: #3ec6ff;
  transition: width 0.3s;
  position: absolute;
  left: 0;
  bottom: -4px;
}
.nav a:hover {
  color: #3ec6ff;
}
.nav a:hover::after {
  width: 100%;
}
.hero {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80vh;
  background: linear-gradient(120deg, #0a1833 60%, #1a3a6b 100%);
  position: relative;
  z-index: 1;
  text-align: center;
}
.hero-content {
  z-index: 2;
  position: relative;
}
.hero h1 {
  font-size: 3rem;
  color: #3ec6ff;
  margin-bottom: 16px;
  letter-spacing: 2px;
  text-shadow: 0 4px 32px #3ec6ff33;
}
.hero p {
  font-size: 1.3rem;
  margin-bottom: 32px;
  color: #e0eaff;
}
.cta-btn {
  background: linear-gradient(90deg, #3ec6ff, #1a3a6b);
  color: #fff;
  padding: 14px 40px;
  border: none;
  border-radius: 32px;
  font-size: 1.2rem;
  font-weight: bold;
  cursor: pointer;
  box-shadow: 0 2px 16px #3ec6ff44;
  transition: background 0.3s, transform 0.2s;
  text-decoration: none;
}
.cta-btn:hover {
  background: linear-gradient(90deg, #1a3a6b, #3ec6ff);
  transform: translateY(-2px) scale(1.05);
}
.section {
  padding: 80px 0 60px 0;
  background: transparent;
  z-index: 1;
  position: relative;
}
.section.dark {
  background: rgba(10, 24, 51, 0.95);
}
.section h2 {
  font-size: 2.2rem;
  color: #3ec6ff;
  margin-bottom: 40px;
  text-align: center;
  letter-spacing: 1px;
}
.product-intro {
  display: flex;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
}
.product-img {
  width: 320px;
  height: 200px;
  background: #1a3a6b;
  border-radius: 16px;
  object-fit: cover;
  box-shadow: 0 4px 32px #3ec6ff22;
}
.product-desc {
  flex: 1;
  font-size: 1.2rem;
  color: #e0eaff;
}
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}
.feature-card {
  background: rgba(30, 54, 107, 0.8);
  border-radius: 16px;
  padding: 32px 24px;
  text-align: center;
  box-shadow: 0 2px 16px #3ec6ff22;
  transition: transform 0.2s, box-shadow 0.2s;
}
.feature-card:hover {
  transform: translateY(-6px) scale(1.04);
  box-shadow: 0 8px 32px #3ec6ff44;
}
.feature-card .icon {
  font-size: 2.5rem;
  margin-bottom: 16px;
  color: #3ec6ff;
}
.features-card h3 {
  color: #fff;
}
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
}
.scenario-card {
  background: rgba(30, 54, 107, 0.7);
  border-radius: 16px;
  padding: 24px 16px;
  text-align: center;
  box-shadow: 0 2px 16px #3ec6ff22;
  transition: transform 0.2s, box-shadow 0.2s;
}
.scenario-card:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 8px 32px #3ec6ff44;
}
.scenario-card img {
  width: 80px;
  height: 80px;
  object-fit: cover;
  border-radius: 50%;
  margin-bottom: 16px;
  background: #1a3a6b;
}
.contact-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 400px;
  margin: 0 auto 32px auto;
}
.contact-form input,
.contact-form textarea {
  padding: 12px;
  border-radius: 8px;
  border: none;
  font-size: 1rem;
  background: #1a3a6b;
  color: #fff;
  resize: none;
}
.contact-form button {
  background: linear-gradient(90deg, #3ec6ff, #1a3a6b);
  color: #fff;
  border: none;
  border-radius: 32px;
  padding: 12px 0;
  font-size: 1.1rem;
  font-weight: bold;
  cursor: pointer;
  transition: background 0.3s, transform 0.2s;
}
.contact-form button:hover {
  background: linear-gradient(90deg, #1a3a6b, #3ec6ff);
  transform: translateY(-2px) scale(1.04);
}
.contact-info {
  text-align: center;
  color: #e0eaff;
  font-size: 1rem;
}
.footer {
  background: #0a1833;
  color: #3ec6ff;
  text-align: center;
  padding: 24px 0;
  font-size: 1rem;
  letter-spacing: 1px;
  z-index: 2;
  position: relative;
}
/* 汉堡菜单按钮样式 */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  outline: none;
  cursor: pointer;
  position: absolute;
  right: 24px;
  top: 24px;
  z-index: 20;
  width: 36px;
  height: 36px;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.nav-toggle .bar {
  display: block;
  width: 28px;
  height: 4px;
  margin: 4px 0;
  background: #3ec6ff;
  border-radius: 2px;
  transition: 0.3s;
}

/* 移动端导航栏样式 */
@media (max-width: 900px) {
  .nav-toggle {
    display: flex;
  }
  .nav {
    position: absolute;
    top: 64px;
    right: 16px;
    left: 16px;
    background: rgba(10, 24, 51, 0.98);
    border-radius: 16px;
    box-shadow: 0 8px 32px #3ec6ff22;
    flex-direction: column;
    align-items: center;
    padding: 0;
    display: none;
    transition: all 0.3s;
    z-index: 15;
  }
  .nav.open {
    display: flex;
    animation: navFadeIn 0.3s;
  }
  .nav a {
    margin: 20px 0;
    font-size: 1.2rem;
    width: 100%;
    text-align: center;
  }
  .logo {
    padding: 16px 0 16px 8px;
  }
}
@media (max-width: 600px) {
  .container {
    padding: 0 8px;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .section h2 {
    font-size: 1.4rem;
  }
  .product-img {
    width: 100%;
    height: 140px;
  }
  .features-grid, .scenarios-grid {
    grid-template-columns: 1fr;
  }
  .nav {
    top: 56px;
    left: 8px;
    right: 8px;
  }
}
@keyframes navFadeIn {
  from { opacity: 0; transform: translateY(-20px); }
  to { opacity: 1; transform: translateY(0); }
}