:root {
  --primary-color: #1e88e5; /* 科技蓝主色调 */
  --primary-light: #6ab7ff;
  --primary-dark: #005cb2;
  --secondary-color: #f5f5f5;
  --text-color: #333333;
  --light-text: #ffffff;
  --dark-text: #212121;
  --border-color: #e0e0e0;
  --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

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

/* 通用容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 15px;
}

.section {
  padding: 80px 0;
}

@media (max-width: 768px) {
  .section {
    padding: 50px 0;
  }
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
  margin-bottom: 20px;
  font-weight: 700;
  color: var(--dark-text);
}

h1 {
  font-size: 2.5rem;
}

h2 {
  font-size: 2rem;
}

h3 {
  font-size: 1.75rem;
}

@media (max-width: 768px) {
  h1 {
    font-size: 2rem;
  }
  
  h2 {
    font-size: 1.75rem;
  }
  
  h3 {
    font-size: 1.5rem;
  }
}

/* 按钮样式 */
.btn {
  display: inline-block;
  padding: 12px 24px;
  background-color: var(--primary-color);
  color: var(--light-text);
  text-decoration: none;
  border-radius: 4px;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-weight: 500;
  text-align: center;
}

.btn:hover {
  background-color: var(--primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow);
}

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

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

/* 导航栏 */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  background-color: var(--light-text);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: all 0.3s ease;
}

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

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

.logo img {
  height: 40px;
}

.logo-text {
  margin-left: 10px;
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

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

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

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

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

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

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  
  .nav-links {
    position: fixed;
    top: 70px;
    left: -100%;
    width: 100%;
    height: calc(100vh - 70px);
    background-color: var(--light-text);
    flex-direction: column;
    align-items: center;
    padding-top: 30px;
    transition: all 0.5s ease;
  }
  
  .nav-links.active {
    left: 0;
  }
  
  .nav-links li {
    margin: 15px 0;
  }
}

/* 页脚 */
.footer {
  background-color: #263238;
  color: var(--light-text);
  padding: 60px 0 30px;
}

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

.footer-logo {
  margin-bottom: 15px;
}

.footer-logo img {
  height: 40px;
}

.footer h4 {
  color: var(--light-text);
  margin-bottom: 25px;
  position: relative;
}

.footer h4::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: -10px;
  width: 50px;
  height: 2px;
  background-color: var(--primary-color);
}

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

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

.footer-links a {
  color: #b0bec5;
  text-decoration: none;
  transition: color 0.3s ease;
}

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

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

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

.copyright {
  text-align: center;
  margin-top: 40px;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
}

/* 首页英雄区 */
.hero {
  height: 100vh;
  min-height: 600px;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary-color));
  color: var(--light-text);
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
}

.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: url('../img/pattern.svg');
  opacity: 0.1;
}

.hero-content {
  max-width: 650px;
  position: relative;
  z-index: 10;
}

.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 25px;
  line-height: 1.2;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  opacity: 0.9;
}

@media (max-width: 768px) {
  .hero {
    min-height: 500px;
    text-align: center;
  }
  
  .hero h1 {
    font-size: 2.5rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
}

/* 服务特性区块 */
.features {
  text-align: center;
  background-color: var(--light-text);
}

.section-header {
  max-width: 700px;
  margin: 0 auto 60px;
}

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

.feature-item {
  padding: 30px;
  background-color: var(--light-text);
  border-radius: 6px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

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

.feature-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 20px;
  background-color: rgba(30, 136, 229, 0.1);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 30px;
  color: var(--primary-color);
}

/* 关于我们 */
.about {
  background-color: #f5f7fa;
}

.about-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
  align-items: center;
}

.about-image img {
  max-width: 100%;
  border-radius: 6px;
  box-shadow: var(--shadow);
}

.about-content h2 {
  margin-bottom: 25px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
  gap: 20px;
  margin-top: 30px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--primary-color);
}

.stat-label {
  font-size: 0.9rem;
  color: #78909c;
}

@media (max-width: 768px) {
  .about-container {
    grid-template-columns: 1fr;
  }
  
  .about-image {
    order: 2;
  }
  
  .about-content {
    order: 1;
  }
}

/* 产品区块 */
.products {
  background-color: var(--light-text);
}

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

.product-card {
  background-color: var(--light-text);
  border-radius: 6px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

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

.product-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.product-content {
  padding: 25px;
}

.product-tag {
  display: inline-block;
  padding: 5px 10px;
  background-color: rgba(30, 136, 229, 0.1);
  color: var(--primary-color);
  border-radius: 4px;
  font-size: 0.8rem;
  margin-bottom: 15px;
}

.product-title {
  margin-bottom: 15px;
}

.product-desc {
  color: #78909c;
  margin-bottom: 20px;
}

/* 联系我们 */
.contact {
  background-color: #f5f7fa;
}

.contact-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 50px;
}

.contact-info-box {
  background-color: var(--primary-color);
  padding: 40px;
  border-radius: 6px;
  color: var(--light-text);
}

.contact-info-box h3 {
  color: var(--light-text);
  margin-bottom: 25px;
}

.contact-method {
  display: flex;
  margin-bottom: 25px;
}

.contact-icon {
  width: 50px;
  height: 50px;
  background-color: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-right: 15px;
}

.contact-details h4 {
  color: var(--light-text);
  margin-bottom: 5px;
}

.contact-form {
  background-color: var(--light-text);
  padding: 40px;
  border-radius: 6px;
  box-shadow: var(--shadow);
}

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

.form-control {
  width: 100%;
  padding: 12px 15px;
  border: 1px solid var(--border-color);
  border-radius: 4px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary-color);
}

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

@media (max-width: 768px) {
  .contact-container {
    grid-template-columns: 1fr;
  }
}

/* 工具类 */
.text-center {
  text-align: center;
}

.mt-20 {
  margin-top: 20px;
}

.mb-20 {
  margin-bottom: 20px;
}

/* 动画效果 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate {
  animation: fadeIn 0.8s ease-out forwards;
}