/* 全局样式 */
:root {
  --primary-color: #2c3e50;
  --secondary-color: #e74c3c;
  --accent-color: #3498db;
  --text-color: #333;
  --light-bg: #f8f9fa;
  --dark-bg: #2c3e50;
  --border-radius: 8px;
  --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition: all 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Hiragino Sans GB", "STHeiti", "WenQuanYi Micro Hei", sans-serif;
  line-height: 1.6;
  color: var(--text-color);
}

/* 导航栏样式 */
.navbar {
  background-color: var(--primary-color);
  padding: 1rem 5%;
  position: fixed;
  width: 100%;
  top: 0;
  z-index: 1000;
  transition: var(--transition);
  box-shadow: var(--box-shadow);
}

.navbar.scrolled {
  padding: 0.5rem 5%;
  background-color: rgba(44, 62, 80, 0.95);
}

.navbar-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  max-width: 1200px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

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

.logo-text {
  color: white;
  font-size: 1.5rem;
  font-weight: bold;
}

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

.nav-link {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

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

.nav-link::after {
  content: '';
  position: absolute;
  width: 0;
  height: 2px;
  bottom: 0;
  left: 50%;
  background-color: var(--secondary-color);
  transition: var(--transition);
}

.nav-link:hover::after {
  width: 80%;
  left: 10%;
}

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

/* 主页英雄区域 */
.hero {
  background: linear-gradient(135deg, var(--dark-bg), #34495e);
  color: white;
  padding: 8rem 1rem 4rem;
  text-align: center;
}

.hero-content {
  max-width: 900px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  letter-spacing: 1px;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  background-color: var(--secondary-color);
  color: white;
  text-decoration: none;
  border-radius: var(--border-radius);
  font-weight: 600;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: #c0392b;
  transform: translateY(-3px);
  box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn-outline {
  background-color: transparent;
  border: 2px solid white;
  margin-left: 1rem;
}

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

/* 服务区域 */
.section {
  padding: 5rem 1rem;
}

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

.section-title h2 {
  font-size: 2rem;
  color: var(--primary-color);
}

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

.services-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.service-card {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 2rem;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
  text-align: center;
}

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

.service-icon {
  width: 70px;
  height: 70px;
  margin: 0 auto 1.5rem;
}

.service-card h3 {
  font-size: 1.4rem;
  margin-bottom: 1rem;
  color: var(--primary-color);
}

/* 案例展示 */
.cases {
  background-color: var(--light-bg);
}

.cases-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
}

.case-card {
  background-color: white;
  border-radius: var(--border-radius);
  overflow: hidden;
  box-shadow: var(--box-shadow);
  transition: var(--transition);
}

.case-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
}

.case-img {
  height: 200px;
  width: 100%;
  background-color: #f1f1f1;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.case-img svg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.case-content {
  padding: 1.5rem;
}

.case-content h3 {
  margin-bottom: 0.5rem;
  color: var(--primary-color);
}

.case-content p {
  margin-bottom: 1rem;
  color: #666;
}

.read-more {
  color: var(--accent-color);
  text-decoration: none;
  font-weight: 600;
  display: inline-block;
  transition: var(--transition);
}

.read-more:hover {
  color: #2980b9;
  transform: translateX(5px);
}

/* 关于我们 */
.about {
  background: linear-gradient(135deg, #f6f6f6, #eaeaea);
}

.about-content {
  max-width: 900px;
  margin: 0 auto;
  text-align: center;
}

/* 联系我们 */
.contact-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
  max-width: 1200px;
  margin: 0 auto;
}

.contact-info {
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

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

.contact-icon {
  margin-right: 1rem;
  width: 24px;
  height: 24px;
  color: var(--accent-color);
}

.contact-form {
  background-color: white;
  padding: 2rem;
  border-radius: var(--border-radius);
  box-shadow: var(--box-shadow);
}

.form-group {
  margin-bottom: 1.5rem;
}

.form-control {
  width: 100%;
  padding: 0.8rem;
  border: 1px solid #ddd;
  border-radius: 4px;
  font-family: inherit;
}

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

/* 页脚 */
.footer {
  background-color: var(--dark-bg);
  color: white;
  padding: 3rem 1rem;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
}

.footer-section h3 {
  margin-bottom: 1rem;
  position: relative;
  padding-bottom: 0.5rem;
}

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

.footer-section p,
.footer-section ul {
  margin-bottom: 1rem;
}

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

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

.footer-links a {
  color: #ccc;
  text-decoration: none;
  transition: var(--transition);
}

.footer-links a:hover {
  color: white;
  margin-left: 5px;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  margin-top: 2rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 1200px;
  margin: 2rem auto 0;
}

.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 1rem;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero p {
    font-size: 1.1rem;
  }
}

@media (max-width: 768px) {
  .hamburger {
    display: block;
    width: 30px;
    height: 20px;
    position: relative;
    cursor: pointer;
  }
  
  .hamburger span {
    display: block;
    width: 100%;
    height: 2px;
    background-color: white;
    position: absolute;
    transition: var(--transition);
  }
  
  .hamburger span:nth-child(1) {
    top: 0;
  }
  
  .hamburger span:nth-child(2) {
    top: 9px;
  }
  
  .hamburger span:nth-child(3) {
    top: 18px;
  }
  
  .hamburger.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 9px;
  }
  
  .hamburger.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 9px;
  }

  .nav-menu {
    position: fixed;
    right: -100%;
    top: 70px;
    flex-direction: column;
    background-color: var(--primary-color);
    width: 80%;
    border-radius: 0 0 0 10px;
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
    padding: 2rem 0;
  }

  .nav-menu.active {
    right: 0;
  }

  .nav-item {
    margin: 0.7rem 0;
  }

  .hero {
    padding: 7rem 1rem 4rem;
  }

  .btn {
    display: block;
    width: 100%;
    margin-bottom: 1rem;
  }

  .btn-outline {
    margin-left: 0;
  }
}

@media (max-width: 576px) {
  .hero h1 {
    font-size: 1.8rem;
  }

  .hero p {
    font-size: 1rem;
  }

  .section-title h2 {
    font-size: 1.8rem;
  }

  .service-card,
  .case-card,
  .contact-info,
  .contact-form {
    padding: 1.5rem;
  }
}