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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: #333;
}

header {
  background: white;
  color: #333;
  padding: 1rem 0;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

.logo {
  font-size: 1.8rem;
  font-weight: bold;
  text-decoration: none;
  color: white;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

nav a {
  color: #333;
  text-decoration: none;
  transition: color 0.3s;
}

nav a:hover {
  color: #ff5722;
}

.hero {
  background: linear-gradient(180deg, #fff5f0 0%, #ffffff 100%);
  color: #333;
  padding: 4rem 0;
  text-align: center;
}

.hero h1 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

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

.btn {
  display: inline-block;
  padding: 12px 30px;
  background: #ff5722;
  color: white;
  text-decoration: none;
  border-radius: 25px;
  font-weight: bold;
  transition: transform 0.3s;
}

.btn:hover {
  transform: translateY(-2px);
}

.features {
  padding: 4rem 0;
}

.features h2 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 3rem;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.feature-card {
  padding: 2rem;
  background: #f8f9fa;
  border-radius: 10px;
  text-align: center;
  transition: transform 0.3s;
}

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

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

.showcase {
  padding: 4rem 0;
  background: white;
}

.showcase-item {
  display: flex;
  align-items: center;
  gap: 3rem;
  margin-bottom: 4rem;
}

.showcase-item:nth-child(even) {
  flex-direction: row-reverse;
}

.showcase-image {
  flex: 1;
  max-width: 500px;
}

.showcase-image img {
  width: 100%;
  border-radius: 10px;
  box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.showcase-content {
  flex: 1;
}

.showcase-content h2 {
  font-size: 2rem;
  margin-bottom: 1rem;
  color: #333;
}

.showcase-content p {
  font-size: 1.1rem;
  line-height: 1.8;
  color: #666;
}

@media (max-width: 768px) {
  .showcase-item {
    flex-direction: column !important;
  }

  .showcase-image {
    max-width: 100%;
  }
}

footer {
  background: #2c3e50;
  color: white;
  padding: 2rem 0;
  text-align: center;
  margin-top: 4rem;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 2rem;
  margin-top: 2rem;
}

.news-card {
  background: white;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
  transition: transform 0.3s;
}

.news-card:hover {
  transform: translateY(-5px);
}

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

.news-content {
  padding: 1.5rem;
}

.news-content h3 {
  margin-bottom: 0.5rem;
}

.news-date {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.download-section {
  background: #f8f9fa;
  padding: 3rem 0;
  margin: 2rem 0;
  border-radius: 10px;
}

.download-options {
  display: flex;
  justify-content: center;
  gap: 2rem;
  flex-wrap: wrap;
  margin-top: 2rem;
}

.download-card {
  background: white;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
  min-width: 250px;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

@media (max-width: 768px) {
  nav ul {
    flex-direction: column;
    gap: 1rem;
  }

  .hero h1 {
    font-size: 1.8rem;
  }
}