:root {
  --primary-color: #1e55a9;
  --secondary-color: #ff6b00;
  --accent-color: #00b8d4;
  --background-color: #f8f9fa;
  --text-color: #333333;
  --light-text: #ffffff;
  --dark-text: #222222;
  --border-color: #e0e0e0;
  --shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

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

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

/* 预加载字体 */
@font-face {
  font-family: 'Noto Sans SC';
  font-style: normal;
  font-weight: 400;
  font-display: swap;
  src: url(https://fonts.gstatic.com/s/notosanssc/v20/k3kXo84MPvpLmixcA63oeALhLOCT-xWNm3Q.woff2) format('woff2');
  unicode-range: U+0000-00FF, U+0131, U+0152-0153, U+02BB-02BC, U+02C6, U+02DA, U+02DC, U+2000-206F, U+2074, U+20AC, U+2122, U+2191, U+2193, U+2212, U+2215, U+FEFF, U+FFFD;
}

a {
  text-decoration: none;
  color: var(--primary-color);
  transition: color 0.3s ease;
}

a:hover {
  color: var(--secondary-color);
}

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

/* 导航栏样式 */
.header {
  background-color: var(--primary-color);
  box-shadow: var(--shadow);
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

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

.logo img {
  height: 40px;
  margin-right: 10px;
}

.logo-text {
  color: var(--light-text);
  font-size: 1.5rem;
  font-weight: 600;
}

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

.nav-menu li {
  margin-left: 20px;
}

.nav-menu a {
  color: var(--light-text);
  font-weight: 500;
  position: relative;
  padding: 5px 0;
}

.nav-menu a:hover {
  color: var(--secondary-color);
}

.nav-menu a:after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 0;
  background-color: var(--secondary-color);
  transition: width 0.3s ease;
}

.nav-menu a:hover:after {
  width: 100%;
}

.hamburger {
  display: none;
  cursor: pointer;
}

.bar {
  display: block;
  width: 25px;
  height: 3px;
  margin: 5px auto;
  background-color: var(--light-text);
  transition: all 0.3s ease-in-out;
}

/* 英雄区域样式 */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: var(--light-text);
  padding: 160px 0 80px;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 20px;
  font-weight: 700;
}

.hero p {
  font-size: 1.2rem;
  max-width: 800px;
  margin: 0 auto 30px;
  opacity: 0.9;
}

.cta-button {
  display: inline-block;
  background-color: var(--secondary-color);
  color: var(--light-text);
  padding: 12px 30px;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: 2px solid transparent;
}

.cta-button:hover {
  background-color: transparent;
  border-color: var(--light-text);
  color: var(--light-text);
  transform: translateY(-3px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

/* 服务区域样式 */
.services {
  padding: 80px 0;
  background-color: #ffffff;
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2rem;
  color: var(--primary-color);
  position: relative;
  margin-bottom: 20px;
}

.section-title h2:after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background-color: var(--secondary-color);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.service-card {
  background-color: #ffffff;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
  text-align: center;
  padding: 30px 20px;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.service-icon {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.service-card h3 {
  margin-bottom: 15px;
  color: var(--primary-color);
}

.service-card p {
  color: var(--text-color);
  margin-bottom: 15px;
}

/* 关于我们区域样式 */
.about {
  padding: 80px 0;
  background-color: var(--background-color);
}

.about-content {
  display: flex;
  align-items: center;
  gap: 40px;
}

.about-text {
  flex: 1;
}

.about-image {
  flex: 1;
  text-align: center;
}

.about-image svg {
  max-width: 100%;
  height: auto;
  box-shadow: var(--shadow);
  border-radius: 8px;
}

/* 特色区域样式 */
.features {
  padding: 80px 0;
  background-color: #ffffff;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.feature-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: 30px 20px;
  border-radius: 8px;
  background-color: #ffffff;
  box-shadow: var(--shadow);
  transition: transform 0.3s ease;
}

.feature-item:hover {
  transform: translateY(-5px);
}

.feature-icon {
  font-size: 2.5rem;
  color: var(--secondary-color);
  margin-bottom: 20px;
}

/* 流程区域样式 */
.process {
  padding: 80px 0;
  background-color: var(--background-color);
}

.process-steps {
  display: flex;
  justify-content: space-between;
  position: relative;
  margin-top: 50px;
}

.process-steps:before {
  content: '';
  position: absolute;
  top: 50px;
  left: 0;
  width: 100%;
  height: 3px;
  background-color: var(--primary-color);
  z-index: 1;
}

.step {
  position: relative;
  z-index: 2;
  background-color: var(--background-color);
  padding: 0 15px;
  text-align: center;
  width: 25%;
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 60px;
  height: 60px;
  background-color: var(--primary-color);
  color: var(--light-text);
  border-radius: 50%;
  font-size: 1.5rem;
  font-weight: bold;
  margin: 0 auto 20px;
}

/* 联系我们区域样式 */
.contact {
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--accent-color) 100%);
  color: var(--light-text);
}

.contact-container {
  display: flex;
  flex-wrap: wrap;
  gap: 30px;
}

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

.contact-info h3 {
  margin-bottom: 20px;
  font-size: 1.5rem;
}

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

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  margin-bottom: 5px;
  font-weight: 500;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  background-color: rgba(255, 255, 255, 0.1);
  color: var(--light-text);
}

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

.submit-button {
  background-color: var(--secondary-color);
  color: var(--light-text);
  border: none;
  padding: 12px 30px;
  border-radius: 50px;
  cursor: pointer;
  font-weight: 600;
  transition: all 0.3s ease;
}

.submit-button:hover {
  background-color: #ff8c00;
  transform: translateY(-3px);
}

/* 页脚样式 */
.footer {
  background-color: #222;
  color: #fff;
  padding: 50px 0 20px;
}

.footer-content {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 30px;
  margin-bottom: 40px;
}

.footer-section {
  flex: 1;
  min-width: 200px;
}

.footer-section h3 {
  margin-bottom: 20px;
  color: var(--light-text);
  position: relative;
  padding-bottom: 10px;
}

.footer-section h3:after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 50px;
  height: 2px;
  background-color: var(--secondary-color);
}

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

.footer-links li {
  margin-bottom: 10px;
}

.footer-links a {
  color: #aaa;
  transition: all 0.3s ease;
}

.footer-links a:hover {
  color: var(--secondary-color);
  padding-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid #444;
  color: #aaa;
}

.footer-bottom p {
  font-size: 0.9rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 15px;
}

.footer-logo img {
  height: 30px;
  margin-right: 10px;
}

/* 响应式设计 */
@media screen and (max-width: 991px) {
  .hero h1 {
    font-size: 2.2rem;
  }
  
  .process-steps {
    flex-direction: column;
    align-items: center;
  }
  
  .process-steps:before {
    display: none;
  }
  
  .step {
    width: 100%;
    margin-bottom: 30px;
  }
  
  .about-content {
    flex-direction: column;
  }
}

@media screen and (max-width: 768px) {
  .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--primary-color);
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    padding: 20px 0;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-menu li {
    margin: 15px 0;
  }
  
  .hamburger {
    display: block;
  }
  
  .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  
  .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .services-grid,
  .features-grid {
    grid-template-columns: 1fr;
  }
  
  .section-title h2 {
    font-size: 1.5rem;
  }
}