/* 现代化样式 */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');
@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.0.0/css/all.min.css');

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

body {
  font-family: 'Inter', 'Segoe UI', Arial, sans-serif;
  background: linear-gradient(135deg, #ff8c42 0%, #ff6b35 100%);
  color: #333;
  line-height: 1.6;
}

/* Header 样式 */
header {
  background: rgba(34, 34, 34, 0.95);
  backdrop-filter: blur(10px);
  color: #fff;
  padding: 15px 0;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.1);
}

.logo-container {
  position: absolute;
  left: 20px;
  top: 50%;
  transform: translateY(-50%);
}

.logo-container img {
  width: 120px;
  height: auto;
}

nav {
  display: flex;
  justify-content: center;
  gap: 40px;
  margin: 0 auto;
  max-width: 600px;
}

nav a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  font-size: 16px;
  transition: all 0.3s ease;
  position: relative;
}

nav a:hover {
  color: #ffd700;
  transform: translateY(-2px);
}

nav a::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: -5px;
  left: 0;
  background-color: #ffd700;
  transition: width 0.3s ease;
}

nav a:hover::after {
  width: 100%;
}

/* Banner 样式 */
.banner {
  background: linear-gradient(135deg, #ff8c42 0%, #ff6b35 100%);
  color: #fff;
  padding: 120px 20px 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.banner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('banner-bg.svg') center/cover;
  opacity: 0.8;
}

.banner-content {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
}

.banner h2 {
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 20px;
  text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.banner p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

.banner-buttons {
  display: flex;
  gap: 20px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  padding: 12px 30px;
  border: none;
  border-radius: 50px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.btn-primary {
  background: #ff8c42;
  color: #fff;
}

.btn-primary:hover {
  background: #ff6b35;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(255, 140, 66, 0.4);
}

.btn-secondary {
  background: rgba(255,255,255,0.2);
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}

.btn-secondary:hover {
  background: rgba(255,255,255,0.3);
  transform: translateY(-2px);
}

/* Section 样式 */
.section {
  max-width: 1200px;
  margin: 60px auto;
  background: #fff;
  border-radius: 20px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.1);
  padding: 50px 30px;
  position: relative;
  overflow: hidden;
}

.section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #ff8c42, #ffd700);
}

.section h3 {
  font-size: 2.5rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
  color: #333;
  position: relative;
}

.section h3::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(90deg, #ff8c42, #ffd700);
  border-radius: 2px;
}

/* Services 样式 */
.services {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.service {
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
  border-radius: 15px;
  padding: 30px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid #e9ecef;
  position: relative;
  overflow: hidden;
}

.service::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #ff8c42, #ffd700);
}

.service:hover {
  transform: translateY(-10px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #ff8c42, #ffd700);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  color: #fff;
  font-size: 2rem;
}

.service h4 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #333;
}

.service p {
  color: #666;
  line-height: 1.6;
}

/* Cases 样式 */
.cases {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.case {
  background: #fff;
  border-radius: 15px;
  padding: 30px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
  border: 1px solid #f0f0f0;
  position: relative;
  overflow: hidden;
}

.case::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: linear-gradient(90deg, #ff8c42, #ffd700);
}

.case:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0,0,0,0.15);
}

.case-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #ff8c42, #ffd700);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  color: #fff;
  font-size: 1.5rem;
}

.case h4 {
  font-size: 1.3rem;
  font-weight: 600;
  margin-bottom: 15px;
  color: #333;
}

.case p {
  color: #666;
  line-height: 1.6;
}

/* Contact 样式 */
.contact {
  text-align: center;
  background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-top: 40px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 15px;
  padding: 20px;
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.08);
  transition: all 0.3s ease;
}

.contact-item:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.15);
}

.contact-icon {
  width: 50px;
  height: 50px;
  background: linear-gradient(135deg, #ff8c42, #ffd700);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
}

.contact-text {
  text-align: left;
}

.contact-text h5 {
  font-weight: 600;
  margin-bottom: 5px;
  color: #333;
}

.contact-text p {
  color: #666;
  margin: 0;
}

/* Footer 样式 */
footer {
  background: #222;
  color: #fff;
  padding: 30px 0;
  text-align: center;
  margin-top: 60px;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  padding: 0 20px;
}

.footer-section h4 {
  margin-bottom: 15px;
  color: #ff8c42;
}

.footer-section p {
  color: #ccc;
  line-height: 1.6;
}

.social-links {
  display: flex;
  gap: 15px;
  justify-content: center;
  margin-top: 15px;
}

.social-links a {
  width: 40px;
  height: 40px;
  background: #ff8c42;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  text-decoration: none;
  transition: all 0.3s ease;
}

.social-links a:hover {
  background: #ffd700;
  transform: translateY(-3px);
}

.copyright {
  border-top: 1px solid #444;
  margin-top: 30px;
  padding-top: 20px;
  color: #999;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .banner h2 {
    font-size: 2rem;
  }
  
  .banner p {
    font-size: 1rem;
  }
  
  .section {
    margin: 40px 20px;
    padding: 30px 20px;
  }
  
  .services, .cases {
    grid-template-columns: 1fr;
  }
  
  .banner-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  nav {
    gap: 20px;
  }
  
  .logo-container {
    position: static;
    transform: none;
    margin-bottom: 15px;
  }
  
  header {
    padding: 10px 0;
  }
}

@media (max-width: 480px) {
  .banner {
    padding: 100px 15px 60px;
  }
  
  .section {
    padding: 20px 15px;
  }
  
  .contact-info {
    grid-template-columns: 1fr;
  }
}