/* 全局样式 */
:root {
  --primary-color: #3498db;
  --secondary-color: #2c3e50;
  --accent-color: #e74c3c;
  --light-color: #f8f9fa;
  --dark-color: #343a40;
  --text-color: #333;
  --border-color: #ddd;
  --transition: all 0.3s ease;
}

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

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

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

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

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

ul {
  list-style: none;
}

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

.btn {
  display: inline-block;
  padding: 12px 30px;
  background-color: var(--primary-color);
  color: white;
  border: none;
  border-radius: 4px;
  cursor: pointer;
  transition: var(--transition);
  font-weight: 600;
  text-align: center;
}

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

.btn-small {
  padding: 8px 20px;
  font-size: 0.9rem;
}

.section-title {
  text-align: center;
  margin-bottom: 40px;
  font-size: 2.2rem;
  color: var(--secondary-color);
  position: relative;
  padding-bottom: 15px;
}

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

/* 头部样式 */
header {
  background-color: white;
  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: 15px;
}

.logo h1 {
  font-size: 1.8rem;
  color: var(--secondary-color);
}

nav ul {
  display: flex;
}

nav ul li {
  margin-left: 25px;
}

nav ul li a {
  color: var(--dark-color);
  font-weight: 500;
  padding: 5px 0;
  position: relative;
}

nav ul li a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

nav ul li a:hover::after,
nav ul li a.active::after {
  width: 100%;
}

nav ul li a.active {
  color: var(--primary-color);
}

.menu-toggle {
  display: none;
  font-size: 1.5rem;
  cursor: pointer;
}

/* 页面头部 */
.page-header {
  background-color: var(--secondary-color);
  color: white;
  padding: 60px 0;
  text-align: center;
}

.page-header h2 {
  font-size: 2.5rem;
  margin-bottom: 15px;
}

/* 首页英雄区 */
.hero {
  background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../images/hero-bg.svg') no-repeat center center/cover;
  color: white;
  padding: 120px 0;
  text-align: center;
}

.hero-content h2 {
  font-size: 3rem;
  margin-bottom: 20px;
}

.hero-content p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

/* 特性区域 */
.features {
  padding: 80px 0;
  background-color: var(--light-color);
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.feature-item {
  background-color: white;
  padding: 30px;
  border-radius: 5px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: var(--transition);
}

.feature-item:hover {
  transform: translateY(-10px);
}

.feature-item i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.feature-item h3 {
  margin-bottom: 15px;
  color: var(--secondary-color);
}

/* 产品预览 */
.products-preview {
  padding: 80px 0;
}

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

.product-item {
  border: 1px solid var(--border-color);
  border-radius: 5px;
  overflow: hidden;
  transition: var(--transition);
}

.product-item:hover {
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.product-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.product-item h3 {
  padding: 15px 15px 5px;
  color: var(--secondary-color);
}

.product-item p {
  padding: 0 15px 15px;
}

.product-item .btn-small {
  margin: 0 15px 15px;
}

/* 客户评价 */
.testimonials {
  padding: 80px 0;
  background-color: var(--light-color);
}

.testimonial-slider {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.testimonial-item {
  background-color: white;
  padding: 30px;
  border-radius: 5px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  display: none;
}

.testimonial-item.active {
  display: block;
}

.testimonial-item p {
  font-style: italic;
  margin-bottom: 20px;
  font-size: 1.1rem;
}

.client h4 {
  color: var(--secondary-color);
  margin-bottom: 5px;
}

.slider-controls {
  display: flex;
  justify-content: center;
  margin-top: 20px;
}

.slider-controls span {
  width: 40px;
  height: 40px;
  background-color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin: 0 10px;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
  transition: var(--transition);
}

.slider-controls span:hover {
  background-color: var(--primary-color);
  color: white;
}

/* 产品服务页面 */
.products {
  padding: 80px 0;
}

.product-categories {
  margin-bottom: 40px;
}

.category-filter {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
}

.category-filter li {
  padding: 8px 20px;
  margin: 5px;
  cursor: pointer;
  border-radius: 30px;
  transition: var(--transition);
  background-color: var(--light-color);
}

.category-filter li.active,
.category-filter li:hover {
  background-color: var(--primary-color);
  color: white;
}

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

.product-list .product-item {
  display: flex;
  flex-direction: column;
}

.product-image {
  height: 200px;
  overflow: hidden;
}

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

.product-item:hover .product-image img {
  transform: scale(1.1);
}

.product-info {
  padding: 20px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
}

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

.product-info p {
  margin-bottom: 15px;
  flex-grow: 1;
}

/* 服务区域 */
.services {
  padding: 80px 0;
  background-color: var(--light-color);
}

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.service-item {
  background-color: white;
  padding: 30px;
  border-radius: 5px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: var(--transition);
}

.service-item:hover {
  transform: translateY(-10px);
}

.service-item i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

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

/* CTA区域 */
.cta {
  padding: 80px 0;
  background-color: var(--primary-color);
  color: white;
  text-align: center;
}

.cta h2 {
  font-size: 2.2rem;
  margin-bottom: 15px;
}

.cta p {
  margin-bottom: 30px;
  font-size: 1.1rem;
}

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

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

/* 关于我们页面 */
.about-intro {
  padding: 80px 0;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.about-text h2 {
  font-size: 2rem;
  color: var(--secondary-color);
  margin-bottom: 20px;
}

.about-text p {
  margin-bottom: 15px;
}

.about-image img {
  border-radius: 5px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.mission-vision {
  padding: 80px 0;
  background-color: var(--light-color);
  text-align: center;
}

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

.mission-vision i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.mission-vision h3 {
  margin-bottom: 15px;
  color: var(--secondary-color);
}

.history {
  padding: 80px 0;
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::after {
  content: '';
  position: absolute;
  width: 2px;
  background-color: var(--primary-color);
  top: 0;
  bottom: 0;
  left: 50%;
  margin-left: -1px;
}

.timeline-item {
  padding: 10px 40px;
  position: relative;
  width: 50%;
  box-sizing: border-box;
}

.timeline-item:nth-child(odd) {
  left: 0;
}

.timeline-item:nth-child(even) {
  left: 50%;
}

.timeline-year {
  position: absolute;
  width: 80px;
  height: 80px;
  right: -40px;
  background-color: var(--primary-color);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: bold;
  z-index: 1;
}

.timeline-item:nth-child(even) .timeline-year {
  left: -40px;
}

.timeline-content {
  padding: 20px;
  background-color: white;
  border-radius: 5px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.timeline-content h3 {
  color: var(--secondary-color);
  margin-bottom: 10px;
}

.team {
  padding: 80px 0;
  background-color: var(--light-color);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.team-member {
  background-color: white;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
}

.team-member img {
  max-width: 60px;
  max-height: 60px;
  border-radius: 50%;
  margin: 0 auto 15px auto;
  display: block;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

.team-member h3 {
  margin: 15px 0 5px;
  color: var(--secondary-color);
}

.team-member .position {
  color: var(--primary-color);
  font-weight: 500;
  margin-bottom: 10px;
}

.team-member .description {
  padding: 0 15px 15px;
}

.partners {
  padding: 80px 0;
}

.partner-logos {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 30px;
}

.partner-logo {
  width: 150px;
  height: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: var(--transition);
}

.partner-logo:hover {
  filter: grayscale(0);
  opacity: 1;
}

.partner-logo img {
  max-width: 80px;
  max-height: 80px;
  object-fit: contain;
  margin: 0 auto;
  display: block;
}

/* 联系我们页面 */
.contact-info {
  padding: 80px 0;
}

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

.contact-item {
  background-color: white;
  padding: 30px;
  border-radius: 5px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  text-align: center;
  transition: var(--transition);
}

.contact-item:hover {
  transform: translateY(-10px);
}

.contact-item i {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.contact-item h3 {
  margin-bottom: 15px;
  color: var(--secondary-color);
}

.contact-form {
  padding: 80px 0;
  background-color: var(--light-color);
}

.contact-form form {
  max-width: 800px;
  margin: 0 auto;
  background-color: white;
  padding: 30px;
  border-radius: 5px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.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: 10px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-family: inherit;
  font-size: 1rem;
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary-color);
}

.map {
  padding: 80px 0;
}

.map-container {
  height: 450px;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.faq {
  padding: 80px 0;
  background-color: var(--light-color);
}

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

.accordion-item {
  margin-bottom: 15px;
  border-radius: 5px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.accordion-header {
  background-color: white;
  padding: 15px 20px;
  cursor: pointer;
  font-weight: 500;
  position: relative;
}

.accordion-header::after {
  content: '\f107';
  font-family: 'Font Awesome 5 Free';
  font-weight: 900;
  position: absolute;
  right: 20px;
  transition: var(--transition);
}

.accordion-item.active .accordion-header::after {
  transform: rotate(180deg);
}

.accordion-content {
  background-color: white;
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: var(--transition);
}

.accordion-item.active .accordion-content {
  padding: 15px 20px;
  max-height: 200px;
}

/* 页脚 */
footer {
  background-color: var(--secondary-color);
  color: white;
  padding: 60px 0 0;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 30px;
}

.footer-about h3,
.footer-links h3,
.footer-contact h3,
.footer-social h3 {
  margin-bottom: 20px;
  font-size: 1.2rem;
}

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

.footer-links ul li a {
  color: #ddd;
}

.footer-links ul li a:hover {
  color: var(--primary-color);
}

.footer-contact p {
  margin-bottom: 10px;
  display: flex;
  align-items: center;
}

.footer-contact p i {
  margin-right: 10px;
  color: var(--primary-color);
}

.social-icons {
  display: flex;
}

.social-icons a {
  width: 40px;
  height: 40px;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 10px;
  color: white;
  transition: var(--transition);
}

.social-icons a:hover {
  background-color: var(--primary-color);
}

.footer-bottom {
  text-align: center;
  padding: 20px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* 行业解决方案 */
.industry-solutions {
  padding: 80px 0;
  background-color: white;
}

.industry-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.industry-item {
  text-align: center;
  padding: 30px 20px;
  background-color: var(--light-color);
  border-radius: 10px;
  transition: var(--transition);
}

.industry-item:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.industry-item i {
  font-size: 3rem;
  color: var(--primary-color);
  margin-bottom: 20px;
}

.industry-item h3 {
  font-size: 1.3rem;
  color: var(--secondary-color);
  margin-bottom: 15px;
}

.industry-item p {
  color: var(--text-color);
  line-height: 1.6;
}

/* 响应式设计 */
@media (max-width: 992px) {
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: -1;
  }
  
  .timeline-item {
    width: 100%;
    padding-left: 70px;
    padding-right: 25px;
  }
  
  .timeline-item:nth-child(even) {
    left: 0;
  }
  
  .timeline::after {
    left: 31px;
  }
  
  .timeline-year {
    left: -9px !important;
    right: auto !important;
    width: 60px;
    height: 60px;
    font-size: 1rem;
  }
}

@media (max-width: 768px) {
  .menu-toggle {
    display: block;
  }
  
  nav {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 80%;
    height: calc(100vh - 70px);
    background-color: white;
    transition: var(--transition);
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
  }
  
  nav.active {
    left: 0;
  }
  
  nav ul {
    flex-direction: column;
    padding: 20px;
  }
  
  nav ul li {
    margin: 15px 0;
  }
  
  .hero-content h2 {
    font-size: 2.2rem;
  }
  
  .section-title {
    font-size: 1.8rem;
  }
}

@media (max-width: 576px) {
  .hero {
    padding: 80px 0;
  }
  
  .hero-content h2 {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.5rem;
  }
  
  .feature-grid,
  .product-grid,
  .service-grid,
  .team-grid,
  .contact-grid {
    grid-template-columns: 1fr;
  }
}