/* 全局样式 */
:root {
  --primary-color: #e74c3c;
  --secondary-color: #3498db;
  --accent-color: #2ecc71;
  --dark-color: #333333;
  --light-color: #f8f9fa;
  --text-color: #333333;
  --text-light: #666666;
  --border-color: #e1e1e1;
  --box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
}

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

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

a {
  text-decoration: none;
  color: inherit;
}

ul {
  list-style: none;
}

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

.section {
  padding: 80px 0;
}

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

.section-title h2 {
  font-size: 2.5rem;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.divider {
  width: 60px;
  height: 4px;
  background-color: var(--primary-color);
  margin: 0 auto 20px;
}

.btn {
  display: inline-block;
  padding: 12px 30px;
  border-radius: 5px;
  font-weight: bold;
  text-align: center;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background-color: var(--primary-color);
  color: white;
  border: none;
}

.btn-primary:hover {
  background-color: #c0392b;
}

.btn-outline {
  background-color: transparent;
  color: var(--dark-color);
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  background-color: var(--light-color);
}

/* 页眉样式 */
header {
  background-color: #fff;
  box-shadow: var(--box-shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.navbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 0;
}

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

.logo img {
  height: 50px;
}

.logo-text {
  margin-left: 10px;
}

.logo-text h1 {
  font-size: 1.5rem;
  color: var(--dark-color);
}

.logo-text span {
  font-size: 0.875rem;
  color: var(--text-light);
}

.nav-links {
  display: flex;
}

.nav-links li {
  margin-left: 30px;
}

.nav-links a {
  color: var(--dark-color);
  font-weight: 500;
  transition: color 0.3s ease;
}

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

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

/* 英雄区域样式 */
.hero {
  background-color: var(--light-color);
  text-align: center;
  padding: 100px 0;
  position: relative;
}

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

.hero h1 {
  font-size: 3rem;
  margin-bottom: 20px;
  color: var(--dark-color);
}

.hero p {
  font-size: 1.25rem;
  margin-bottom: 30px;
  color: var(--text-light);
}

.hero-btns {
  display: flex;
  justify-content: center;
  gap: 15px;
}

/* 关于我们部分 */
.about-content {
  display: flex;
  gap: 50px;
  align-items: center;
}

.about-text {
  flex: 1;
}

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

.about-features {
  flex: 1;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.feature-box {
  background-color: var(--light-color);
  padding: 30px;
  border-radius: 5px;
  text-align: center;
}

.feature-box h3 {
  margin-bottom: 10px;
  color: var(--dark-color);
}

/* 产品部分 */
.products {
  background-color: var(--light-color);
}

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

.product-card {
  background-color: white;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: transform 0.3s ease;
}

.product-card:hover {
  transform: translateY(-10px);
}

.product-img {
  height: 200px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--light-color);
}

.product-img img {
  max-width: 100%;
  max-height: 150px;
}

.product-info {
  padding: 20px;
}

.product-info h3 {
  margin-bottom: 10px;
  color: var(--dark-color);
}

.product-info p {
  color: var(--text-light);
}

/* 服务部分 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.service-box {
  border: 1px solid var(--border-color);
  border-radius: 8px;
  padding: 30px;
  text-align: center;
  transition: all 0.3s ease;
}

.service-box:hover {
  box-shadow: var(--box-shadow);
}

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

.service-box p {
  color: var(--text-light);
}

/* 联系我们部分 */
.contact-us {
  background-color: var(--light-color);
}

.contact-container {
  display: flex;
  gap: 50px;
}

.contact-info {
  flex: 1;
}

.contact-info h3 {
  margin-bottom: 20px;
  color: var(--dark-color);
}

.contact-detail {
  display: flex;
  align-items: flex-start;
  margin-bottom: 20px;
}

.contact-icon {
  margin-right: 15px;
  color: var(--primary-color);
  font-size: 1.25rem;
}

.contact-form {
  flex: 1;
  background-color: white;
  padding: 30px;
  border-radius: 8px;
  box-shadow: var(--box-shadow);
}

.contact-form h3 {
  margin-bottom: 20px;
  color: var(--dark-color);
}

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

.form-group input, .form-group textarea {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 5px;
  font-family: inherit;
  font-size: 1rem;
}

.form-group textarea {
  min-height: 120px;
  resize: vertical;
}

/* 页脚样式 */
footer {
  background-color: var(--dark-color);
  color: white;
  padding: 50px 0 20px;
}

.footer-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 30px;
}

.footer-logo img {
  height: 40px;
  filter: brightness(0) invert(1);
}

.footer-info p {
  margin-bottom: 5px;
}

.footer-info .small-text {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

.copyright {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

/* 响应式设计 */
@media (max-width: 992px) {
  .about-content, .contact-container {
    flex-direction: column;
  }

  .section {
    padding: 60px 0;
  }
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: block;
  }

  .nav-links {
    position: fixed;
    top: 80px;
    left: 0;
    width: 100%;
    background-color: white;
    flex-direction: column;
    align-items: center;
    padding: 20px 0;
    box-shadow: var(--box-shadow);
    transform: translateY(-150%);
    transition: transform 0.3s ease;
  }

  .nav-links.active {
    transform: translateY(0);
  }

  .nav-links li {
    margin: 15px 0;
  }

  .hero h1 {
    font-size: 2.5rem;
  }

  .about-features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 576px) {
  .hero-btns {
    flex-direction: column;
    gap: 10px;
  }

  .section-title h2 {
    font-size: 2rem;
  }

  .feature-box, .product-card, .service-box {
    padding: 20px;
  }
}