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

body {
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: #F8F5F2;
  color: #333333;
  line-height: 1.6;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ========== 导航栏 ========== */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
  z-index: 1000;
  padding: 1rem 0;
  transition: all 0.3s ease;
}

.navbar.scrolled {
  padding: 0.5rem 0;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: bold;
  color: #B92425;
  text-decoration: none;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: scale(1.05);
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 2rem;
  align-items: center;
}

.nav-links a {
  text-decoration: none;
  color: #333333;
  font-weight: 500;
  transition: color 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, #B92425, #F2640B);
  transition: width 0.3s ease;
}

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

.nav-links a:hover {
  color: #B92425;
}

.dropdown {
  position: relative;
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  background: white;
  border-radius: 8px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
  padding: 0.5rem 0;
  min-width: 150px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: all 0.3s ease;
}

.dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu li {
  list-style: none;
}

.dropdown-menu a {
  display: block;
  padding: 0.5rem 1rem;
  color: #333;
  transition: background 0.3s ease;
}

.dropdown-menu a:hover {
  background: #f5f5f5;
  color: #B92425;
}

/* ========== Hero Section ========== */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #B92425 0%, #F2640B 100%);
  padding: 6rem 0 4rem;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.5;
}

.hero-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
  max-width: 1400px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 10;
}

.hero-text {
  flex: 1;
  color: white;
}

.slogan-image {
  width: 350px;
  height: auto;
  margin-bottom: 1.5rem;
}

.slogan-subtitle {
  font-size: 1.2rem;
  opacity: 0.9;
  margin-bottom: 0.5rem;
}

.hero-text h1 {
  font-size: 4rem;
  font-weight: 800;
  margin-bottom: 1rem;
  letter-spacing: -0.02em;
}

.hero-text h2 {
  font-size: 2.5rem;
  font-weight: 400;
  opacity: 0.9;
  white-space: nowrap;
  margin: 0;
}

.hero-visual {
  flex: 1;
  display: flex;
  justify-content: center;
}

.hero-graphic {
  width: 100%;
  max-width: 400px;
  height: auto;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-20px); }
}

/* ========== Section Styles ========== */
.section-title {
  font-size: 2.5rem;
  font-weight: 700;
  color: #333;
  text-align: center;
  margin-bottom: 0.5rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: #666;
  text-align: center;
  margin-bottom: 3rem;
}

/* ========== News Section ========== */
.news-section {
  padding: 5rem 0;
  background: #fff;
}

.news-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.news-section-header .section-title,
.news-section-header .section-subtitle {
  text-align: left;
  margin-bottom: 0.5rem;
}

.see-more-link {
  display: inline-block;
  padding: 0.75rem 1.5rem;
  background: #333;
  color: #fff;
  text-decoration: none;
  border-radius: 4px;
  transition: background 0.3s;
  font-size: 1rem;
}

.see-more-link:hover {
  background: #555;
}

.news-container {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.news-card {
  background: #fff;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  cursor: pointer;
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
  min-height: 350px;
}

.news-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

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

.news-card .news-content {
  padding: 1.5rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.news-card h3 {
  font-size: 1.2rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}

.news-card p {
  font-size: 0.9rem;
  color: #666;
  margin-bottom: 1rem;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
  flex: 1;
}

.news-meta {
  margin-top: auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: #999;
}

.news-meta a {
  color: #B92425;
  text-decoration: none;
  font-weight: 500;
}

/* ========== Services Section ========== */
.services {
  padding: 5rem 0;
  background: #F8F5F2;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 2rem;
}

.service-card {
  background: #fff;
  padding: 2rem;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
  transition: all 0.3s ease;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.12);
}

.service-icon {
  font-size: 3rem;
  margin-bottom: 1rem;
}

.service-card h3 {
  font-size: 1.3rem;
  font-weight: 600;
  color: #333;
  margin-bottom: 0.75rem;
}

.service-card p {
  font-size: 0.95rem;
  color: #666;
  line-height: 1.6;
}

/* ========== Company Intro ========== */
.company-intro {
  padding: 5rem 0;
  background: #fff;
}

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

.intro-content p {
  font-size: 1.05rem;
  color: #555;
  line-height: 1.8;
  margin-bottom: 1.5rem;
  text-align: justify;
}

/* ========== Map Section ========== */
.global-map {
  padding: 5rem 0;
  background: #F8F5F2;
}

.map-container {
  max-width: 900px;
  margin: 0 auto 2rem;
}

#china-map {
  background: #fff;
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.map-legend {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
}

.legend-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.9rem;
  color: #666;
}

.legend-dot {
  border-radius: 50%;
}

/* ========== CTA Section ========== */
.cta-section {
  padding: 5rem 0;
  background: linear-gradient(135deg, #B92425 0%, #F2640B 100%);
  color: white;
  text-align: center;
}

.cta-section h2 {
  font-size: 2.5rem;
  font-weight: 700;
  margin-bottom: 1rem;
}

.cta-section p {
  font-size: 1.1rem;
  opacity: 0.9;
  margin-bottom: 2rem;
}

.cta-white-btn {
  display: inline-block;
  padding: 1rem 2.5rem;
  background: white;
  color: #B92425;
  font-size: 1.1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.3s ease;
}

.cta-white-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ========== Footer ========== */
.footer {
  background: #1a1a1a;
  color: #999;
  padding: 4rem 0 2rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}

.footer-section h3 {
  color: #fff;
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
}

.footer-section p,
.footer-section a {
  display: block;
  font-size: 0.9rem;
  color: #999;
  margin-bottom: 0.75rem;
  text-decoration: none;
  transition: color 0.3s ease;
}

.footer-section a:hover {
  color: #B92425;
}

.footer-bottom {
  border-top: 1px solid #333;
  padding-top: 2rem;
  text-align: center;
}

.footer-bottom p {
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
}

/* ========== Back to Top ========== */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 48px;
  height: 48px;
  background: #B92425;
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
  z-index: 999;
}

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

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.3);
}

/* ========== News Modal ========== */
.news-modal {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.7);
  display: none;
  align-items: center;
  justify-content: center;
  z-index: 2000;
  padding: 2rem;
}

.news-modal.active {
  display: flex;
}

.news-modal-content {
  background: white;
  border-radius: 12px;
  max-width: 800px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
}

.news-modal-close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  width: 40px;
  height: 40px;
  background: rgba(0, 0, 0, 0.5);
  color: white;
  border: none;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  transition: background 0.3s ease;
  z-index: 10;
}

.news-modal-close:hover {
  background: rgba(0, 0, 0, 0.7);
}

.news-modal-cover {
  width: 100%;
  height: 300px;
  object-fit: cover;
  display: none;
}

.news-modal-body {
  padding: 2rem;
}

.news-modal-title {
  font-size: 1.8rem;
  font-weight: 700;
  color: #333;
  margin-bottom: 1rem;
}

.news-modal-meta {
  font-size: 0.9rem;
  color: #999;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid #eee;
}

.news-modal-text {
  font-size: 1rem;
  color: #555;
  line-height: 1.8;
}

.news-modal-text p {
  margin-bottom: 1rem;
}

.news-modal-text img {
  max-width: 100%;
  height: auto;
  border-radius: 8px;
  margin: 1rem 0;
}

/* ========== Responsive ========== */
@media (max-width: 768px) {
  .hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .hero-visual {
    order: -1;
  }
  
  .hero-text h1 {
    font-size: 2.5rem;
  }
  
  .nav-links {
    display: none;
  }
  
  .section-title {
    font-size: 2rem;
  }
  
  .news-container,
  .services-grid {
    grid-template-columns: 1fr;
  }
}