/* Standard CSS for Zhongshan Lixiang Trading Co., Ltd. */

:root {
  --primary: #1e3a5f; /* Dark Blue from logo */
  --accent: #e67e22;  /* Orange from logo */
  --primary-hover: #152944;
  --slate-50: #f8fafc;
  --slate-100: #f1f5f9;
  --slate-200: #e2e8f0;
  --slate-500: #64748b;
  --slate-600: #475569;
  --slate-700: #334155;
  --slate-800: #1e293b;
  --slate-900: #0f172a;
}

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

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background-color: var(--slate-50);
  color: var(--slate-900);
  line-height: 1.5;
  scroll-behavior: smooth;
}

.serif {
  font-family: 'Playfair Display', serif;
}

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.8s ease-out forwards;
}

@keyframes spin {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}

.animate-spin {
  animation: spin 1s linear infinite;
}

/* Custom Utilities */
.container-custom {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.section-padding {
  padding: 5rem 0;
}

.btn-primary {
  background-color: var(--primary);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 700;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  cursor: pointer;
  box-shadow: 0 10px 15px -3px rgba(30, 58, 95, 0.2);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
}

.btn-accent {
  background-color: var(--accent);
  color: white;
  padding: 0.75rem 1.5rem;
  border-radius: 9999px;
  font-weight: 700;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  border: none;
  cursor: pointer;
}

.btn-accent:hover {
  opacity: 0.9;
  transform: translateY(-1px);
}

/* Header Styles */
.site-header {
  background-color: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--slate-200);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 5rem;
}

.logo-img {
  height: 60px;
  width: auto;
}

.nav-menu {
  display: none;
}

@media (min-width: 1024px) {
  .nav-menu {
    display: flex;
    gap: 2rem;
  }
}

.nav-link {
  text-decoration: none;
  color: var(--slate-600);
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.2s;
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
}

.nav-link:hover, .nav-link.active {
  color: var(--primary);
}

.nav-link.active {
  border-bottom-color: var(--accent);
}

/* Hero Section */
.hero {
  text-align: center;
  padding: 5rem 0;
}

.hero-title {
  font-size: 3.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
  letter-spacing: -0.025em;
  color: var(--primary);
}

@media (min-width: 768px) {
  .hero-title {
    font-size: 4.5rem;
  }
}

/* Card Styles */
.card {
  background: white;
  padding: 2.5rem;
  border-radius: 1.5rem;
  border: 1px solid var(--slate-200);
  transition: all 0.3s;
}

.card:hover {
  border-color: var(--accent);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05);
  transform: translateY(-5px);
}

/* Footer Styles */
.site-footer {
  background-color: white;
  border-top: 1px solid var(--slate-200);
  padding: 5rem 0;
  margin-top: 5rem;
}

.footer-link {
  color: var(--slate-500);
  text-decoration: none;
  transition: color 0.2s;
}

.footer-link:hover {
  color: var(--primary);
}