:root {
  --primary: #2563EB;
  --primary-dark: #1E40AF;
  --secondary: #7C3AED;
  --accent: #F59E0B;
  --text: #1F2937;
  --text-light: #6B7280;
  --background: #FFFFFF;
  --background-alt: #F3F4F6;
  --border: #E5E7EB;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

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

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* 头部样式 */
header {
  background: linear-gradient(135deg, var(--primary), var(--secondary));
  color: white;
  padding: 2rem 0;
}

.header-content {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

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

.logo svg {
  width: 40px;
  height: 40px;
}

.logo h1 {
  font-size: 1.8rem;
  font-weight: 700;
}

.hero {
  padding: 4rem 0 6rem;
  text-align: center;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 2rem;
}

.btn {
  display: inline-block;
  background-color: var(--accent);
  color: white;
  padding: 0.8rem 2rem;
  border-radius: 0.5rem;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 导航栏 */
nav {
  background-color: white;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 0;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.nav-logo svg {
  width: 30px;
  height: 30px;
}

.nav-logo span {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}

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

.nav-links a {
  text-decoration: none;
  color: var(--text);
  font-weight: 500;
  transition: color 0.3s ease;
}

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

.mobile-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  cursor: pointer;
  color: var(--text);
}

/* 服务部分 */
.services {
  padding: 5rem 0;
  background-color: var(--background-alt);
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  position: relative;
  display: inline-block;
}

.section-title h2:after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 4px;
  background-color: var(--primary);
  border-radius: 2px;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.service-card {
  background-color: white;
  border-radius: 0.5rem;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.service-icon {
  padding: 2rem;
  text-align: center;
  background-color: var(--primary);
  color: white;
}

.service-icon svg {
  width: 60px;
  height: 60px;
}

.service-content {
  padding: 1.5rem;
}

.service-content h3 {
  margin-bottom: 1rem;
  font-size: 1.3rem;
}

/* 优势部分 */
.advantages {
  padding: 5rem 0;
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

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

.advantage-icon {
  width: 80px;
  height: 80px;
  background-color: var(--background-alt);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  margin-bottom: 1.5rem;
}

.advantage-icon svg {
  width: 40px;
  height: 40px;
  color: var(--primary);
}

.advantage-item h3 {
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

/* 客户评价 */
.testimonials {
  padding: 5rem 0;
  background-color: var(--background-alt);
}

.testimonial-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}

.testimonial-card {
  background-color: white;
  padding: 2rem;
  border-radius: 0.5rem;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.testimonial-text {
  font-style: italic;
  margin-bottom: 1.5rem;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.testimonial-author-info h4 {
  font-weight: 600;
}

.testimonial-author-info p {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* 常见问题 */
.faq {
  padding: 5rem 0;
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
  padding-bottom: 1.5rem;
}

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
  font-weight: 600;
  margin-bottom: 0.5rem;
}

.faq-answer {
  color: var(--text-light);
}

/* 联系我们 */
.contact {
  padding: 5rem 0;
  background-color: var(--primary);
  color: white;
}

.contact-content {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
}

.contact-info {
  flex: 1;
  min-width: 300px;
}

.contact-info h3 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.contact-info ul {
  list-style: none;
}

.contact-info li {
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.contact-info svg {
  width: 20px;
  height: 20px;
}

.contact-form {
  flex: 1;
  min-width: 300px;
}

.contact-form h3 {
  margin-bottom: 1.5rem;
  font-size: 1.5rem;
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-group label {
  display: block;
  margin-bottom: 0.5rem;
  font-weight: 500;
}

.form-control {
  width: 100%;
  padding: 0.8rem;
  border: none;
  border-radius: 0.3rem;
  background-color: rgba(255, 255, 255, 0.1);
  color: white;
}

.form-control::placeholder {
  color: rgba(255, 255, 255, 0.7);
}

textarea.form-control {
  min-height: 150px;
  resize: vertical;
}

.contact-btn {
  background-color: var(--accent);
  border: none;
  padding: 0.8rem 2rem;
  border-radius: 0.3rem;
  color: white;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.contact-btn:hover {
  background-color: #E59000;
}

/* 页脚 */
footer {
  padding: 3rem 0;
  background-color: var(--text);
  color: white;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 2rem;
}

.footer-logo {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  flex: 1;
  min-width: 200px;
}

.footer-logo svg {
  width: 40px;
  height: 40px;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 3rem;
}

.footer-links-group {
  min-width: 150px;
}

.footer-links-group h3 {
  margin-bottom: 1rem;
  font-size: 1.2rem;
}

.footer-links-group ul {
  list-style: none;
}

.footer-links-group li {
  margin-bottom: 0.8rem;
}

.footer-links-group a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-links-group a:hover {
  color: white;
}

.footer-bottom {
  margin-top: 3rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

/* 移动响应式 */
@media (max-width: 768px) {
  .header-content {
    gap: 1rem;
  }
  
  .hero {
    padding: 2rem 0 3rem;
  }
  
  .hero h2 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .mobile-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background-color: white;
    flex-direction: column;
    align-items: flex-start;
    padding: 2rem;
    transition: right 0.3s ease;
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .section-title h2 {
    font-size: 1.8rem;
  }
  
  .contact-content {
    flex-direction: column;
  }
}

/* 加载动画 */
.loader {
  width: 48px;
  height: 48px;
  border: 5px solid var(--primary);
  border-bottom-color: transparent;
  border-radius: 50%;
  display: inline-block;
  box-sizing: border-box;
  animation: rotation 1s linear infinite;
}

@keyframes rotation {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}