:root {
  --primary-color: #FF6B6B; /* Warm coral */
  --secondary-color: #4ECDC4; /* Soft teal */
  --background-color: #ffca22; /* 用户指定的背景色 */
  --text-color: #2C3E50; /* Darker blue-gray for better contrast */
  --accent-color: #FFE66D; /* Sunny yellow */
  --border-radius: 16px;
  --transition-speed: 0.3s;
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 8px rgba(0,0,0,0.15);
  --shadow-lg: 0 8px 16px rgba(0,0,0,0.2);
}

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

body {
  font-family: 'PingFang SC', 'Helvetica Neue', sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--background-color);
}

.container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.header {
  background-color: var(--background-color);
  box-shadow: var(--shadow-sm);
  padding: 2rem 0;
}

.logo-container {
  display: flex;
  align-items: center;
  gap: 1rem;
}

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

.header h1 {
  color: var(--primary-color);
  font-size: 2.2rem;
  margin: 0;
  font-weight: 600;
  letter-spacing: -0.5px;
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 1.5rem;
  margin-top: 1rem;
}

.nav-links a {
  text-decoration: none;
  color: var(--text-color);
  transition: all var(--transition-speed);
  padding: 0.5rem 1rem;
  border-radius: var(--border-radius);
}

.nav-links a:hover {
  color: var(--primary-color);
  background: rgba(255,255,255,0.1);
}

.section {
  padding: 4rem 0;
}

.section h2 {
  color: var(--primary-color);
  margin-bottom: 2rem;
  font-size: 2rem;
  font-weight: 600;
  text-align: center;
}

/* 授权方案卡片样式 */
.cards-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  padding: 1rem;
}

.card {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  padding: 2rem;
  transition: all var(--transition-speed);
  border: 1px solid rgba(0,0,0,0.05);
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(0,0,0,0.1);
}

.card h3 {
  color: var(--primary-color);
  font-size: 1.6rem;
  margin-bottom: 1rem;
  text-align: center;
  font-weight: 600;
}

.card .price {
  font-size: 2.2rem;
  font-weight: bold;
  color: var(--secondary-color);
  text-align: center;
  margin: 1.5rem 0;
}

.card .summary {
  color: #666;
  text-align: center;
  margin-bottom: 1.5rem;
  font-size: 1rem;
  line-height: 1.6;
}

.card .features {
  list-style: none;
  padding: 0;
  margin: 0;
}

.card .features li {
  padding: 0.8rem 0;
  border-bottom: 1px solid #eee;
  display: flex;
  align-items: center;
  gap: 0.8rem;
  color: #444;
  font-size: 0.95rem;
}

.card .features li:last-child {
  border-bottom: none;
}

.card .features li::before {
  content: "✓";
  color: var(--primary-color);
  font-weight: bold;
}

/* 其他样式保持不变... */
.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 2rem;
  counter-reset: step;
}

.process-step {
  position: relative;
  padding: 2rem;
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
}

.process-step::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -1.5rem;
  left: -1.5rem;
  width: 3rem;
  height: 3rem;
  background: var(--secondary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
}

/* IP Gallery */
.ip-gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.5rem;
}

.ip-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  aspect-ratio: 1;
}

.ip-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-speed);
}

.ip-card:hover img {
  transform: scale(1.1);
}

/* Case Studies */
.case-studies {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.case-study {
  background: white;
  border-radius: var(--border-radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: all var(--transition-speed);
}

.case-study:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
}

.case-study img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.case-study-content {
  padding: 1.5rem;
}

/* Loading States */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.loading-spinner {
  width: 50px;
  height: 50px;
  border: 4px solid var(--primary-color);
  border-top-color: transparent;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

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

/* Animations */
.section {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s, transform 0.6s;
}

.section.animate {
  opacity: 1;
  transform: translateY(0);
}

/* Button Styles */
.btn {
  display: inline-block;
  padding: 0.8rem 1.5rem;
  background-color: var(--primary-color);
  color: white;
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: all var(--transition-speed);
  font-weight: 500;
  box-shadow: var(--shadow-sm);
}

.btn:hover {
  background-color: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background-color: white;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

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

.more-cases {
  text-align: center;
  margin-top: 2rem;
}

/* Responsive Design */
@media (max-width: 768px) {
  .nav-links {
    flex-direction: column;
    gap: 1rem;
  }
  
  .section {
    padding: 2rem 0;
  }
}

@media (max-width: 480px) {
  .header h1 {
    font-size: 1.8rem;
  }
  
  .section h2 {
    font-size: 1.6rem;
  }
}