:root {
  --primary-color: #1e40af; /* Deep Business Blue */
  --primary-dark: #1e3a8a;
  --secondary-color: #64748b; /* Slate Gray */
  --text-dark: #1e293b;
  --text-light: #475569;
  --bg-light: #f8fafc;
  --white: #ffffff;
  --accent-color: #3b82f6;
}

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

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  color: var(--text-dark);
  line-height: 1.6;
  background-color: var(--bg-light);
}

a {
  text-decoration: none;
  color: inherit;
  transition: 0.3s;
}

ul {
  list-style: none;
}

/* Navigation */
header {
  background-color: var(--white);
  box-shadow: 0 2px 10px rgba(0,0,0,0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
}

nav {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
}

.logo {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
  display: flex;
  align-items: center;
}

.nav-links {
  display: flex;
  gap: 2rem;
}

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

/* Hero Section */
.hero {
  background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 100%);
  color: var(--white);
  padding: 8rem 2rem;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.025em;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2.5rem;
  opacity: 0.9;
  font-weight: 300;
}

.btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  border-radius: 0.375rem;
  font-weight: 600;
  transition: all 0.3s;
  cursor: pointer;
}

.btn-primary {
  background-color: var(--accent-color);
  color: var(--white);
}

.btn-primary:hover {
  background-color: var(--primary-color);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3);
}

/* Sections */
section {
  padding: 6rem 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section-title {
  text-align: center;
  margin-bottom: 4rem;
}

.section-title h2 {
  font-size: 2.25rem;
  color: var(--text-dark);
  margin-bottom: 1rem;
}

.section-title .divider {
  width: 60px;
  height: 4px;
  background-color: var(--primary-color);
  margin: 0 auto;
}

/* Services Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  background: var(--white);
  padding: 2.5rem;
  border-radius: 0.75rem;
  border: 1px solid #e2e8f0;
  transition: all 0.3s;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.05);
  border-color: var(--primary-color);
}

.service-card i {
  font-size: 2rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  display: block;
}

.service-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--text-dark);
}

.service-card p {
  color: var(--text-light);
  font-size: 0.95rem;
}

/* About Section */
.about-container {
  display: flex;
  align-items: center;
  gap: 4rem;
  flex-wrap: wrap;
}

.about-text {
  flex: 1;
  min-width: 300px;
}

.about-text p {
  margin-bottom: 1.5rem;
  font-size: 1.1rem;
  color: var(--text-light);
}

.about-image {
  flex: 1;
  min-width: 300px;
}

.about-image img {
  width: 100%;
  border-radius: 1rem;
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* Advantages */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 3rem;
}

.advantage-item {
  text-align: center;
}

.advantage-item h4 {
  font-size: 1.25rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* Contact */
.contact-section {
  background-color: var(--white);
}

.contact-info {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-info p {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

/* Footer */
footer {
  background-color: #0f172a;
  color: #94a3b8;
  padding: 4rem 2rem 2rem;
}

.footer-content {
  text-align: center;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 2rem;
  border-top: 1px solid #1e293b;
  text-align: center;
}

.icp-link {
  display: block;
  margin-top: 1rem;
  color: #94a3b8;
  font-size: 0.9rem;
}

.icp-link:hover {
  color: var(--white);
}

/* Mobile Adjustments */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }
  .nav-links {
    display: none; /* Simplification for draft */
  }
}