:root {
  --primary-color: #f87d00;
  --secondary-color: #df7008;
  --accent-color: #f68c3b;
  --dark-color: #1e293b;
  --light-color: #f8fafc;
  --gray-color: #64748b;
  --success-color: #10b981;
  --warning-color: #f59e0b;
  --danger-color: #ef4444;
  --border-radius: 12px;
  --box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
  --transition: all 0.3s ease;
}

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

body {
  font-family: 'Inter', sans-serif;
  line-height: 1.7;
  color: var(--dark-color);
  background-color: #f1f5f9;
  background-image: radial-gradient(#cbd5e1 1px, transparent 1px);
  background-size: 20px 20px;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* Header & Navigation */
.header {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.2rem 0;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--dark-color);
}

.logo i {
  color: var(--primary-color);
  font-size: 2rem;
}

.logo-accent {
  color: var(--primary-color);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-menu a {
  text-decoration: none;
  color: var(--gray-color);
  font-weight: 500;
  font-size: 0.95rem;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  transition: var(--transition);
}

.nav-menu a:hover {
  color: var(--primary-color);
  background-color: rgba(37, 99, 235, 0.05);
}

.nav-menu a i {
  font-size: 1.1rem;
}

/* Hero Section */
.hero-section {
  margin: 2.5rem 0 3rem;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero-content {
  padding-right: 2rem;
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 1.2rem;
  color: var(--dark-color);
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--gray-color);
  margin-bottom: 2rem;
}

.hero-stats {
  display: flex;
  gap: 2rem;
  margin-top: 2rem;
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.stat-number {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-text {
  font-size: 0.9rem;
  color: var(--gray-color);
  margin-top: 5px;
}

.hero-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  height: 350px;
}

.hero-image:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Content Sections */
.content-section {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 2.5rem;
  margin-bottom: 2.5rem;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.content-section:hover {
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

.section-header {
  margin-bottom: 2rem;
}

.section-header h2 {
  font-size: 1.8rem;
  font-weight: 600;
  color: var(--dark-color);
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.8rem;
}

.section-header h2 i {
  color: var(--primary-color);
}

.section-divider {
  height: 4px;
  width: 60px;
  background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
  border-radius: 2px;
}

.content-section p {
  margin-bottom: 1.5rem;
  color: var(--gray-color);
  line-height: 1.8;
}

.content-section strong {
  color: var(--dark-color);
  font-weight: 600;
  background-color: rgba(37, 99, 235, 0.05);
  padding: 2px 6px;
  border-radius: 4px;
}

/* Cards & Grids */
.info-card {
  background-color: #f8fafc;
  border-left: 4px solid var(--primary-color);
  padding: 1.5rem;
  border-radius: 8px;
  margin: 1.5rem 0;
}

.info-card h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 1rem;
  color: var(--dark-color);
}

.info-card h3 i {
  color: var(--primary-color);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.feature-card {
  padding: 1.5rem;
  background-color: #f8fafc;
  border-radius: var(--border-radius);
  text-align: center;
  transition: var(--transition);
  border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
}

.feature-icon {
  width: 60px;
  height: 60px;
  background-color: rgba(37, 99, 235, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  color: var(--primary-color);
  font-size: 1.5rem;
}

.feature-card h4 {
  margin-bottom: 0.8rem;
  color: var(--dark-color);
}

/* Seller Section */
.seller-info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
  margin: 2rem 0;
}

.seller-list {
  list-style: none;
  margin: 1.5rem 0;
}

.seller-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.8rem;
  color: var(--gray-color);
}

.seller-list i {
  color: var(--success-color);
}

.seller-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  height: 300px;
}

.seller-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

/* Security Section */
.security-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.security-item {
  padding: 1.5rem;
  background-color: rgba(37, 99, 235, 0.03);
  border-radius: var(--border-radius);
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.security-item h4 {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 0.8rem;
  color: var(--dark-color);
}

.security-item h4 i {
  color: var(--primary-color);
}

/* Advantages Section */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin: 2rem 0;
}

.advantage-card {
  padding: 2rem 1.5rem;
  background-color: white;
  border-radius: var(--border-radius);
  text-align: center;
  border: 1px solid rgba(0, 0, 0, 0.05);
  position: relative;
  overflow: hidden;
  transition: var(--transition);
}

.advantage-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
}

.advantage-number {
  position: absolute;
  top: 15px;
  left: 15px;
  font-size: 1.2rem;
  font-weight: 700;
  color: rgba(37, 99, 235, 0.1);
}

.advantage-card h4 {
  margin-bottom: 0.8rem;
  color: var(--dark-color);
  font-size: 1.2rem;
}

/* Guide Section */
.guide-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  margin: 2rem 0;
}

.guide-steps {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.step {
  display: flex;
  gap: 1.2rem;
  align-items: flex-start;
}

.step-number {
  width: 40px;
  height: 40px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 600;
  flex-shrink: 0;
}

.step-content h4 {
  margin-bottom: 0.5rem;
  color: var(--dark-color);
}

.guide-image {
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  height: 100%;
}

.guide-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.warning-note {
  background-color: rgba(245, 158, 11, 0.1);
  border-left: 4px solid var(--warning-color);
  padding: 1.5rem;
  border-radius: 8px;
  margin-top: 2rem;
  display: flex;
  gap: 15px;
  align-items: flex-start;
}

.warning-note i {
  color: var(--warning-color);
  font-size: 1.5rem;
  margin-top: 3px;
}

/* Footer */
.footer {
  background-color: var(--dark-color);
  color: white;
  padding: 3rem 0;
  margin-top: 3rem;
  border-radius: var(--border-radius) var(--border-radius) 0 0;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.footer-logo {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-logo i {
  color: var(--accent-color);
}

.footer-disclaimer {
  max-width: 800px;
  margin-bottom: 1.5rem;
  background-color: rgba(255, 255, 255, 0.05);
  padding: 1.2rem;
  border-radius: 8px;
}

.footer-disclaimer p {
  display: flex;
  align-items: center;
  gap: 10px;
  justify-content: center;
}

.footer-copyright {
  color: #94a3b8;
  font-size: 0.9rem;
}

/* Responsive Design */
@media (max-width: 992px) {
  .hero-section,
  .seller-info,
  .guide-wrapper {
      grid-template-columns: 1fr;
  }
  
  .features-grid,
  .security-features,
  .advantages-grid {
      grid-template-columns: repeat(2, 1fr);
  }
  
  .hero-content {
      padding-right: 0;
  }
  
  .hero-title {
      font-size: 2.3rem;
  }
}

@media (max-width: 768px) {
  .navbar {
      flex-direction: column;
      gap: 1.5rem;
  }
  
  .nav-menu {
      flex-wrap: wrap;
      justify-content: center;
  }
  
  .hero-title {
      font-size: 2rem;
  }
  
  .features-grid,
  .security-features,
  .advantages-grid {
      grid-template-columns: 1fr;
  }
  
  .content-section {
      padding: 1.8rem;
  }
  
  .hero-stats {
      justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
      padding: 0 15px;
  }
  
  .hero-title {
      font-size: 1.8rem;
  }
  
  .hero-stats {
      flex-direction: column;
      gap: 1.5rem;
  }
  
  .content-section {
      padding: 1.5rem;
  }
  
  .nav-menu {
      flex-direction: column;
      text-align: center;
      gap: 1rem;
  }
}