* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Poppins', Arial, Helvetica, sans-serif;
  background: var(--light-color);
  color: var(--text-color);
  line-height: 1.6;
}
:root {
  --primary-color: #0A2463;
  --secondary-color: #3E92CC;
  --accent-color: #D8315B;
  --dark-color: #1A1A2E;
  --light-color: #F8F9FA;
  --text-color: #333333;
  --text-light: #666666;
  --white: #FFFFFF;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --transition: all 0.3s ease;
  --border-radius: 12px;
  --border-radius-lg: 20px;
  --border-radius-sm: 8px;
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 64px;
}

/* 深色模式变量 */
body.dark-mode {
  --primary-color: #3E92CC;
  --secondary-color: #0A2463;
  --accent-color: #FF6B8B;
  --dark-color: #F8F9FA;
  --light-color: #1A1A2E;
  --text-color: #F8F9FA;
  --text-light: #B0B0B0;
  --white: #2D2D2D;
  --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -2px rgba(0, 0, 0, 0.2);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 10px 10px -5px rgba(0, 0, 0, 0.2);
}

/* 国外风格优化 */
/* 导航栏 */
.nav {
  background: var(--white);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 2px solid var(--primary-color);
}

.nav .logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: var(--transition);
}

.nav-links {
  display: flex;
  gap: var(--spacing-lg);
  align-items: center;
}

.nav-link {
  color: var(--text-color);
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
  position: relative;
  padding: var(--spacing-xs) 0;
}

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

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

.nav-link:hover::after {
  width: 100%;
}

/* 汉堡菜单 */
.hamburger-menu {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}

.hamburger-menu span {
  display: block;
  width: 25px;
  height: 3px;
  background: var(--text-color);
  transition: var(--transition);
}

/* 响应式导航 */
@media (max-width: 767px) {
  .hamburger-menu {
    display: flex;
  }
  
  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    height: 100vh;
    background: var(--white);
    flex-direction: column;
    justify-content: center;
    gap: var(--spacing-lg);
    transition: right 0.3s ease;
    box-shadow: var(--shadow-xl);
  }
  
  .nav-links.active {
    right: 0;
  }
  
  .nav-link {
    font-size: 18px;
  }
  
  .hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
  }
  
  .hamburger-menu.active span:nth-child(2) {
    opacity: 0;
  }
  
  .hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
  }
}

/* 英雄区域 */
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  color: var(--white);
  padding: var(--spacing-2xl) var(--spacing-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 70vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  max-width: 1000px;
  line-height: 1.2;
}

.hero p {
  font-size: 20px;
  margin-bottom: var(--spacing-xl);
  opacity: 0.9;
  max-width: 800px;
}

.hero-buttons {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

.hero-buttons .btn {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 18px;
  font-weight: 600;
  border-radius: 4px;
  transition: var(--transition);
}

.hero-buttons .btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}

/* 响应式调整 */
@media (max-width: 767px) {
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-buttons .btn {
    width: 100%;
    max-width: 250px;
    margin-left: 0 !important;
  }
}

/* 特色服务部分 */
.features-section {
  background: var(--white);
  padding: var(--spacing-2xl) 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  margin-top: var(--spacing-xl);
}

.feature-card {
  background: var(--light-color);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  transition: var(--transition);
  border: 1px solid #e5e7eb;
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.feature-card h3 {
  color: var(--primary-color);
  font-size: 20px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.feature-card p {
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
}

/* 响应式调整 */
@media (max-width: 767px) {
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .feature-card {
    padding: var(--spacing-lg);
  }
  
  .feature-card h3 {
    font-size: 18px;
  }
}

/* 容器样式 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* 部分描述 */
.section-description {
  text-align: center;
  font-size: 18px;
  color: var(--text-light);
  margin-bottom: var(--spacing-xl);
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

/* 产品控制区 */
.product-controls {
  margin-bottom: var(--spacing-xl);
}

.filter-buttons {
  display: flex;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
}

/* 产品卡片 */
.product-card {
  background: var(--white);
  border: 1px solid #e5e7eb;
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: space-between;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.product-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

.product-card h3 {
  font-size: 18px;
  color: var(--dark-color);
  margin-top: var(--spacing-md);
  line-height: 1.5;
  font-weight: 700;
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 60px;
}

.product-img {
  width: 100%;
  height: 200px;
  overflow: hidden;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  position: relative;
  box-shadow: var(--shadow);
  transition: var(--transition);
}

.product-card:hover .product-img {
  box-shadow: var(--shadow-lg);
}

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

.product-card:hover .product-img img {
  transform: scale(1.05);
}

.product-badge {
  position: absolute;
  top: var(--spacing-sm);
  right: var(--spacing-sm);
  background: var(--accent-color);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  z-index: 2;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.product-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  border-radius: var(--border-radius);
  backdrop-filter: blur(2px);
}

.product-card:hover .product-overlay {
  opacity: 1;
}

.product-overlay span {
  background: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 4px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  display: inline-block;
}

.product-card:hover .product-overlay span {
  transform: translateY(0);
}

/* 优势卡片 */
.advantage-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid #e5e7eb;
}

.advantage-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}

/* 联系我们 */
.contact-wrap {
  background: var(--white);
  padding: var(--spacing-2xl) 0;
}

.contact-content {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.contact-info {
  background: var(--light-color);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius);
  border: 1px solid #e5e7eb;
}

.contact-info h3 {
  color: var(--primary-color);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: var(--spacing-md);
  line-height: 1.3;
}

.contact-info p {
  color: var(--text-color);
  line-height: 1.6;
  font-size: 16px;
  margin-bottom: var(--spacing-lg);
}

.contact-details {
  margin-top: var(--spacing-lg);
}

.contact-details p {
  margin-bottom: var(--spacing-sm);
  font-size: 15px;
}

.contact-actions {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-md);
}

.btn-primary {
  background: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
}

.btn-secondary {
  background: var(--white);
  color: var(--primary-color);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
  border: 2px solid var(--primary-color);
  cursor: pointer;
  text-align: center;
}

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

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

/* 响应式调整 */
@media (max-width: 767px) {
  .contact-content {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .contact-info {
    padding: var(--spacing-lg);
  }
  
  .contact-info h3 {
    font-size: 20px;
  }
  
  .contact-actions {
    flex-direction: column;
  }
  
  .btn-primary,
  .btn-secondary {
    width: 100%;
  }
}

/* 按钮样式 */
.btn {
  display: inline-block;
  background: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-sm) var(--spacing-lg);
  border-radius: 4px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
  text-align: center;
}

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

/* 响应式调整 */
@media (max-width: 767px) {
  .nav {
    flex-direction: column;
    padding: var(--spacing-sm) var(--spacing-md);
  }
  
  .hero h1 {
    font-size: 32px;
  }
  
  .hero p {
    font-size: 16px;
  }
}
.lang-switch {
  background: var(--white);
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: right;
  border-bottom: 1px solid #e5e7eb;
  position: sticky;
  top: 0;
  z-index: 999;
  box-shadow: var(--shadow);
}
.lang-switch button {
  padding: var(--spacing-xs) var(--spacing-sm);
  margin: 0 var(--spacing-xs);
  border: 2px solid var(--primary-color);
  background: var(--white);
  color: var(--primary-color);
  border-radius: 25px;
  cursor: pointer;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.lang-switch button:hover {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}
.nav {
  background: var(--white);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
  box-shadow: var(--shadow-xl);
  position: relative;
  z-index: 100;
  border-bottom: 3px solid var(--primary-color);
}
.nav .logo {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary-color);
  text-transform: uppercase;
  letter-spacing: 2px;
  transition: var(--transition);
  display: inline-block;
  position: relative;
}
.nav .logo::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent-color);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.nav .logo:hover::after {
  transform: scaleX(1);
}
.nav .logo:hover {
  transform: scale(1.05);
}
.hero {
  background: linear-gradient(135deg, var(--primary-color) 0%, #001233 100%);
  color: var(--white);
  padding: var(--spacing-2xl) var(--spacing-md);
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 80vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
}
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2MCIgaGVpZ2h0PSI2MCI+CiAgPHBhdGggZD0iTTAgMCBMNjAgNjAgTTYwIDAgTDAgNjAiIHN0cm9rZT0iI2ZmZiIgc3Ryb2tlLXdpZHRoPSIwLjUiIGZpbGw9Im5vbmUiPjwvcGF0aD4KPC9zdmc+');
  opacity: 0.1;
  z-index: 1;
  animation: moveBackground 20s linear infinite;
}
@keyframes moveBackground {
  0% { transform: translateX(0); }
  100% { transform: translateX(60px); }
}
.hero > * {
  position: relative;
  z-index: 2;
  animation: fadeInUp 1s ease-out;
}
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
.hero h1 {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.1;
  text-shadow: 0 4px 8px rgba(0,0,0,0.3);
  letter-spacing: -1px;
}
.hero p {
  font-size: 24px;
  margin-bottom: var(--spacing-xl);
  opacity: 0.95;
  font-weight: 400;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.5;
}
.hero .cta-btn {
  display: inline-block;
  background: var(--accent-color);
  color: var(--white);
  padding: var(--spacing-md) var(--spacing-xl);
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 20px;
  transition: var(--transition);
  box-shadow: 0 8px 25px rgba(216, 49, 91, 0.3);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 3px solid var(--accent-color);
}
.hero .cta-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: 0.5s;
}
.hero .cta-btn:hover::before {
  left: 100%;
}
.hero .cta-btn:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px rgba(216, 49, 91, 0.4);
  background: transparent;
  color: var(--accent-color);
}
.hero .cta-btn:active {
  transform: translateY(-2px);
}
.section {
  padding: var(--spacing-2xl) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
}
.section-title {
  text-align: center;
  color: var(--primary-color);
  font-size: 40px;
  margin-bottom: var(--spacing-2xl);
  font-weight: 800;
  position: relative;
  padding-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 1px;
}
.section-title::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 120px;
  height: 5px;
  background: var(--accent-color);
  border-radius: 3px;
  animation: growFromCenter 1.5s ease-out;
}
@keyframes growFromCenter {
  from { width: 0; }
  to { width: 120px; }
}
.about-wrap {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.about-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}
.about-wrap:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 45px -10px rgba(0, 0, 0, 0.15);
}
.about-content {
  line-height: 1.8;
  font-size: 18px;
  color: var(--text-color);
  text-align: justify;
  margin-bottom: var(--spacing-xl);
  animation: fadeIn 1.5s ease-out;
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.about-stats {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-md);
  margin-top: var(--spacing-xl);
}
@media (min-width: 640px) {
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 992px) {
  .about-stats {
    grid-template-columns: repeat(4, 1fr);
  }
}
.stat-item {
  text-align: center;
  padding: var(--spacing-lg);
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.05) 0%, rgba(62, 146, 204, 0.05) 100%);
  border-radius: var(--border-radius);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(10, 36, 99, 0.1);
}
.stat-item::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: var(--secondary-color);
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.stat-item:hover::before {
  transform: scaleX(1);
}
.stat-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.1) 0%, rgba(62, 146, 204, 0.1) 100%);
}
.stat-item .num {
  font-size: 40px;
  font-weight: 800;
  color: var(--primary-color);
  display: block;
  margin-bottom: var(--spacing-xs);
  animation: countUp 2s ease-in-out;
  line-height: 1;
}
.stat-item .label {
  font-size: 16px;
  color: var(--text-light);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  animation: fadeInUp 1s ease-out 0.5s both;
}
@keyframes countUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--spacing-lg);
}
@media (min-width: 640px) {
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 768px) {
  .products-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}
@media (min-width: 1200px) {
  .products-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}
.product-card {
  background: var(--white);
  border: 3px solid transparent;
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  text-align: center;
  transition: var(--transition);
  cursor: pointer;
  overflow: hidden;
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
  justify-content: space-between;
  box-shadow: var(--shadow-lg);
  background: linear-gradient(var(--white), var(--white)) padding-box,
              linear-gradient(135deg, var(--primary-color), var(--secondary-color)) border-box;
}
.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(10, 36, 99, 0.1), transparent);
  transition: 0.5s;
}
.product-card:hover::before {
  left: 100%;
}
.product-card:hover {
  box-shadow: var(--shadow-xl);
  transform: translateY(-15px) scale(1.03);
  border-color: var(--primary-color);
}
.product-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.product-card:hover::after {
  transform: scaleX(1);
}
.product-card h3 {
  font-size: 18px;
  color: var(--dark-color);
  margin-top: var(--spacing-md);
  line-height: 1.5;
  font-weight: 700;
  flex-grow: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 80px;
  animation: fadeInUp 1s ease-out 0.3s both;
}
.product-img {
  width: 100%;
  height: 220px;
  overflow: hidden;
  border-radius: var(--border-radius);
  margin-bottom: var(--spacing-md);
  position: relative;
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  border: 1px solid rgba(10, 36, 99, 0.1);
}
.product-card:hover .product-img {
  box-shadow: var(--shadow-xl);
}
.product-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.product-card:hover .product-img img {
  transform: scale(1.25) rotate(3deg);
}
.product-card .product-overlay {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(10, 36, 99, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  border-radius: var(--border-radius);
  backdrop-filter: blur(2px);
}
.product-card:hover .product-overlay {
  opacity: 1;
}
.product-card .product-overlay::after {
  content: '👁️ 查看详情';
  background: var(--primary-color);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: 25px;
  font-size: 16px;
  font-weight: 600;
  transform: translateY(30px);
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
}
.product-card:hover .product-overlay::after {
  transform: translateY(0);
}
.product-card .product-badge {
  position: absolute;
  top: var(--spacing-md);
  right: var(--spacing-md);
  background: var(--accent-color);
  color: var(--white);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: 20px;
  font-size: 14px;
  font-weight: 700;
  transform: scale(0);
  transition: var(--transition);
  z-index: 2;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  box-shadow: var(--shadow-lg);
}
.product-card:hover .product-badge {
  transform: scale(1);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(1); }
  50% { transform: scale(1.05); }
  100% { transform: scale(1); }
}
.advantages-wrap {
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.02) 0%, rgba(62, 146, 204, 0.02) 100%);
  position: relative;
  padding: var(--spacing-2xl) 0;
}
.advantages-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2MCIgaGVpZ2h0PSI2MCI+CiAgPHBhdGggZD0iTTAgMCBMNjAgNjAgTTYwIDAgTDAgNjAiIHN0cm9rZT0iIzBBMjQ2MyIgc3Ryb2tlLXdpZHRoPSIwLjUiIGZpbGw9Im5vbmUiPjwvcGF0aD4KPC9zdmc+');
  opacity: 0.05;
  z-index: 1;
  animation: moveBackground 30s linear infinite;
}
.advantages-wrap > * {
  position: relative;
  z-index: 2;
}
.advantages-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
}
@media (min-width: 768px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
.advantage-card {
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-lg);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(10, 36, 99, 0.1);
  animation: fadeInUp 1s ease-out;
}
.advantage-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 8px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary-color), var(--accent-color));
}
.advantage-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-xl);
  border-color: var(--primary-color);
}
.advantage-card h3 {
  color: var(--primary-color);
  font-size: 24px;
  margin-bottom: var(--spacing-md);
  font-weight: 700;
  display: flex;
  align-items: center;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.advantage-card h3::before {
  content: '🚀';
  margin-right: var(--spacing-sm);
  font-size: 28px;
}
.advantage-card p {
  color: var(--text-color);
  line-height: 1.8;
  font-size: 16px;
  animation: fadeIn 1.5s ease-out 0.3s both;
}
.contact-wrap {
  background: linear-gradient(135deg, rgba(10, 36, 99, 0.02) 0%, rgba(62, 146, 204, 0.02) 100%);
  text-align: center;
  position: relative;
  overflow: hidden;
  padding: var(--spacing-2xl) 0;
}
.contact-wrap::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2MCIgaGVpZ2h0PSI2MCI+CiAgPHBhdGggZD0iTTAgMCBMNjAgNjAgTTYwIDAgTDAgNjAiIHN0cm9rZT0iIzBBMjQ2MyIgc3Ryb2tlLXdpZHRoPSIwLjUiIGZpbGw9Im5vbmUiPjwvcGF0aD4KPC9zdmc+');
  opacity: 0.05;
  z-index: 1;
  animation: moveBackground 30s linear infinite;
}
.contact-wrap > * {
  position: relative;
  z-index: 2;
}
.contact-info {
  max-width: 800px;
  margin: 0 auto;
  background: var(--white);
  padding: var(--spacing-xl);
  border-radius: var(--border-radius-lg);
  box-shadow: var(--shadow-xl);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  border: 1px solid rgba(10, 36, 99, 0.1);
}
.contact-info::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 6px;
  background: linear-gradient(90deg, var(--primary-color), var(--secondary-color), var(--accent-color));
}
.contact-info:hover {
  transform: translateY(-10px);
  box-shadow: 0 30px 45px -10px rgba(0, 0, 0, 0.15);
  border-color: var(--primary-color);
}
.contact-info p {
  font-size: 18px;
  margin-bottom: var(--spacing-md);
  color: var(--text-color);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  animation: fadeInUp 1s ease-out;
}
.contact-info p strong {
  color: var(--primary-color);
  font-weight: 700;
  min-width: 120px;
  text-align: right;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.contact-info p::before {
  content: '📌';
  font-size: 20px;
  opacity: 0.7;
}
.contact-wrap .contact-buttons {
  margin-top: var(--spacing-xl);
  display: flex;
  justify-content: center;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}
.contact-wrap .contact-buttons a {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--primary-color);
  color: var(--white);
  border-radius: 50px;
  text-decoration: none;
  font-weight: 700;
  font-size: 18px;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
  text-transform: uppercase;
  letter-spacing: 1px;
  border: 3px solid var(--primary-color);
}
.contact-wrap .contact-buttons a::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: 0.5s;
}
.contact-wrap .contact-buttons a:hover::before {
  left: 100%;
}
.contact-wrap .contact-buttons a:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px rgba(10, 36, 99, 0.4);
  background: transparent;
  color: var(--primary-color);
}
.footer {
  background: linear-gradient(135deg, var(--dark-color) 0%, #0A0A1A 100%);
  color: var(--white);
  text-align: center;
  padding: var(--spacing-2xl) var(--spacing-md);
  position: relative;
  overflow: hidden;
  border-top: 3px solid var(--primary-color);
}
.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml;base64,PHN2ZyB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciIHdpZHRoPSI2MCIgaGVpZ2h0PSI2MCI+CiAgPHBhdGggZD0iTTAgMCBMNjAgNjAgTTYwIDAgTDAgNjAiIHN0cm9rZT0iI2ZmZiIgc3Ryb2tlLXdpZHRoPSIwLjUiIGZpbGw9Im5vbmUiPjwvcGF0aD4KPC9zdmc+');
  opacity: 0.05;
  z-index: 1;
  animation: moveBackground 30s linear infinite;
}
.footer > * {
  position: relative;
  z-index: 2;
}
.footer .footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-xl);
  align-items: center;
}
@media (min-width: 768px) {
  .footer .footer-content {
    grid-template-columns: 2fr 1fr;
    text-align: left;
  }
}

/* 移动设备响应式优化 */
@media (max-width: 767px) {
  .hero h1 {
    font-size: 32px;
  }
  .hero p {
    font-size: 18px;
  }
  .hero .cta-btn {
    font-size: 16px;
    padding: var(--spacing-sm) var(--spacing-lg);
  }
  .section {
    padding: var(--spacing-xl) var(--spacing-sm);
  }
  .section-title {
    font-size: 28px;
  }
  .contact-info p {
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
  .contact-info p strong {
    min-width: auto;
    text-align: left;
    margin-bottom: 5px;
  }
  .contact-buttons {
    flex-direction: column;
    align-items: center;
  }
  .contact-buttons a {
    width: 100%;
    max-width: 300px;
    text-align: center;
  }
  .modal-content {
    margin: 20px auto;
    width: 95%;
  }
  .modal-body {
    padding: 30px 20px;
  }
  .lang-switch {
    padding: var(--spacing-xs) var(--spacing-sm);
  }
  .lang-switch button {
    padding: 4px 8px;
    font-size: 12px;
    margin: 0 2px;
  }
  .nav .logo {
    font-size: 24px;
  }
  .product-card h3 {
    font-size: 16px;
    min-height: 60px;
  }
  .product-img {
    height: 180px;
  }
  .advantage-card h3 {
    font-size: 20px;
  }
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
  .stat-item .num {
    font-size: 32px;
  }
  .stat-item .label {
    font-size: 14px;
  }
}

/* 平板设备响应式优化 */
@media (min-width: 768px) and (max-width: 1199px) {
  .hero h1 {
    font-size: 40px;
  }
  .products-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .advantages-grid {
    grid-template-columns: 1fr;
  }
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* 大屏幕设备优化 */
@media (min-width: 1200px) {
  .container {
    max-width: 1200px;
    margin: 0 auto;
  }
}

/* 回到顶部按钮 */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: var(--white);
  border: none;
  border-radius: 50%;
  font-size: 24px;
  font-weight: bold;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--primary-color);
}

.back-to-top:hover {
  background: var(--white);
  color: var(--primary-color);
  transform: translateY(-5px);
  box-shadow: var(--shadow-xl);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

/* 平滑滚动 */
html {
  scroll-behavior: smooth;
}
[data-lang] {
  display: none;
}
[data-lang="zh"] {
  display: inline;
}
body.ar {
  direction: rtl;
}
body.ar .lang-switch {
  text-align: left;
}
.filter-btn {
  padding: 12px 24px;
  margin: 0 8px 15px;
  border: 2px solid var(--primary-color);
  background: var(--white);
  color: var(--primary-color);
  border-radius: 50px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.filter-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(15, 82, 186, 0.1), transparent);
  transition: 0.5s;
}
.filter-btn:hover::before,
.filter-btn.active::before {
  left: 100%;
}
.filter-btn:hover,
.filter-btn.active {
  background: var(--primary-color);
  color: var(--white);
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(15, 82, 186, 0.2);
}
.modal {
  display: none;
  position: fixed;
  z-index: 10000;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.8);
  overflow-y: auto;
  backdrop-filter: blur(5px);
}
.modal-content {
  background: var(--white);
  margin: 50px auto;
  max-width: 1000px;
  width: 90%;
  border-radius: 20px;
  position: relative;
  animation: modalFadeIn 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
  border: 1px solid rgba(255, 255, 255, 0.1);
}
@keyframes modalFadeIn {
  from { 
    opacity: 0; 
    transform: translateY(-50px) scale(0.9);
  }
  to { 
    opacity: 1; 
    transform: translateY(0) scale(1);
  }
}
.modal-close {
  position: absolute;
  right: 20px;
  top: 20px;
  font-size: 32px;
  color: #6b7280;
  cursor: pointer;
  line-height: 1;
  background: var(--white);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  z-index: 10;
}
.modal-close:hover {
  color: var(--primary-color);
  transform: rotate(90deg);
  background: #f3f4f6;
}
.modal-body {
  padding: 50px;
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
}
@media (min-width: 768px) {
  .modal-body {
    grid-template-columns: 1fr 1fr;
  }
}
.modal-img {
  width: 100%;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  position: relative;
}
.modal-img img {
  width: 100%;
  height: auto;
  display: block;
  transition: transform 0.5s ease;
}
.modal-img:hover img {
  transform: scale(1.05);
}
.modal-info h2 {
  color: var(--primary-color);
  font-size: 28px;
  margin-bottom: 20px;
  font-weight: 700;
  line-height: 1.2;
}
.modal-info .modal-desc {
  margin: 20px 0;
  line-height: 1.8;
  color: var(--text-color);
  font-size: 16px;
}
.modal-info .modal-params {
  background: linear-gradient(135deg, #f0f5ff 0%, #e0e7ff 100%);
  padding: 25px;
  border-radius: 12px;
  margin: 25px 0;
  border-left: 4px solid var(--primary-color);
}
.modal-info .modal-params p {
  margin-bottom: 10px;
  color: var(--text-color);
  font-size: 15px;
}
.modal-info .modal-params strong {
  color: var(--primary-color);
  font-weight: 600;
  min-width: 120px;
  display: inline-block;
}
.modal-info .cta-btn {
  background: var(--primary-color);
  color: var(--white);
  padding: 16px 40px;
  border-radius: 50px;
  text-decoration: none;
  font-weight: 600;
  font-size: 16px;
  display: inline-block;
  transition: var(--transition);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  position: relative;
  overflow: hidden;
  margin-top: 30px;
}
.modal-info .cta-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
  transition: 0.5s;
}
.modal-info .cta-btn:hover::before {
  left: 100%;
}
.modal-info .cta-btn:hover {
  background: #0a3d8a;
  transform: translateY(-3px);
  box-shadow: 0 10px 15px -3px rgba(15, 82, 186, 0.3);
}