/* 全局重置 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --primary-color: #0067b8;
  --secondary-color: #2b3a55;
  --accent-color: #e9632b;
  --light-color: #f5f5f5;
  --dark-color: #232323;
  --text-color: #333;
  --text-light: #666;
  --text-dark: #111;
  --border-color: #e0e0e0;
  --success-color: #28a745;
}

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

h1, h2, h3, h4, h5, h6 {
  margin-bottom: 1rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--dark-color);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

p {
  margin-bottom: 1rem;
}

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

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

img {
  max-width: 100%;
  height: auto;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  font-weight: 500;
  text-align: center;
  border-radius: 4px;
  border: none;
  cursor: pointer;
  transition: all 0.3s;
}

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

.btn-primary:hover {
  background-color: #005292;
  color: white;
}

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

.btn-accent {
  background-color: var(--accent-color);
  color: white;
}

/* 头部样式 */
header {
  background-color: #fff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
  position: sticky;
  top: 0;
  z-index: 1000;
}

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

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

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

.nav-menu {
  display: flex;
}

.nav-item {
  list-style: none;
  margin-left: 1.5rem;
}

.nav-link {
  color: var(--text-color);
  font-weight: 500;
  font-size: 1.1rem;
}

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

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

/* 英雄区样式 */
.hero {
  background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
  color: white;
  padding: 5rem 0;
  text-align: center;
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  color: white;
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 2rem;
}

/* 服务区块 */
.services {
  padding: 5rem 0;
  background-color: var(--light-color);
}

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

.section-title h2 {
  display: inline-block;
  position: relative;
  padding-bottom: 10px;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background-color: var(--primary-color);
}

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

.service-card {
  background-color: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s, box-shadow 0.3s;
}

.service-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.service-content {
  padding: 1.5rem;
}

.service-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.service-icon svg {
  width: 60px;
  height: 60px;
  fill: var(--primary-color);
}

.service-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  text-align: center;
}

/* 关于我们 */
.about {
  padding: 5rem 0;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
  align-items: center;
}

/* 为什么选择我们 */
.why-us {
  padding: 5rem 0;
  background-color: var(--light-color);
}

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

.feature-item {
  background-color: white;
  padding: 1.5rem;
  border-radius: 8px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  text-align: center;
}

.feature-icon {
  display: flex;
  justify-content: center;
  margin-bottom: 1rem;
}

.feature-icon svg {
  width: 50px;
  height: 50px;
  fill: var(--accent-color);
}

/* 联系我们 */
.contact {
  padding: 5rem 0;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2rem;
}

.contact-info {
  padding: 2rem;
  background-color: var(--light-color);
  border-radius: 8px;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 0.8rem;
  margin-bottom: 1rem;
  border: 1px solid var(--border-color);
  border-radius: 4px;
}

.contact-form textarea {
  min-height: 150px;
}

.contact-info-item {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
}

.contact-icon {
  margin-right: 1rem;
}

/* 页脚样式 */
footer {
  background-color: var(--secondary-color);
  color: white;
  padding: 3rem 0 1rem;
}

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

.footer-logo {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: white;
}

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

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.8);
}

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

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 响应式设计 */
@media screen and (max-width: 992px) {
  .about-content,
  .contact-content {
    grid-template-columns: 1fr;
  }
}

@media screen and (max-width: 768px) {
  .container {
    padding: 0 20px;
  }
  
  .mobile-nav-toggle {
    display: block;
  }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    background-color: white;
    flex-direction: column;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    transition: 0.3s;
  }
  
  .nav-menu.active {
    left: 0;
  }
  
  .nav-item {
    margin: 0;
    text-align: center;
  }
  
  .nav-link {
    display: block;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-color);
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
}

@media screen and (max-width: 576px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  .hero {
    padding: 3rem 0;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .services,
  .about,
  .why-us,
  .contact {
    padding: 3rem 0;
  }
}