:root {
  --primary-color: #F3BA2F;
  --secondary-color: #1E2026;
  --accent-color: #0C0F48;
  --light-bg: #F8F9FA;
  --dark-bg: #1E2026;
  --text-light: #FFFFFF;
  --text-dark: #333333;
  --text-gray: #666666;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
}

body {
  background-color: var(--light-bg);
  color: var(--text-dark);
  line-height: 1.6;
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

header {
  background-color: var(--secondary-color);
  color: var(--text-light);
  padding: 1rem 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo img {
  height: 40px;
  width: auto;
}

.logo h1 {
  font-size: 1.5rem;
  color: var(--primary-color);
  margin: 0;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 20px;
}

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

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

.language-switcher {
  position: relative;
  cursor: pointer;
}

.language-switcher-content {
  display: none;
  position: absolute;
  right: 0;
  top: 100%;
  background-color: var(--secondary-color);
  border-radius: 4px;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
  overflow: hidden;
  z-index: 10;
}

.language-switcher:hover .language-switcher-content {
  display: block;
}

.language-switcher-content a {
  display: block;
  padding: 10px 15px;
  white-space: nowrap;
  color: var(--text-light);
  text-decoration: none;
}

.language-switcher-content a:hover {
  background-color: var(--accent-color);
}

.hero {
  background: linear-gradient(135deg, var(--secondary-color) 0%, var(--accent-color) 100%);
  color: var(--text-light);
  padding: 4rem 0;
  text-align: center;
}

.hero h2 {
  font-size: 2.5rem;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.hero-buttons {
  display: flex;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

section {
  padding: 4rem 0;
}

.features {
  background-color: var(--light-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
  margin-top: 2rem;
}

.feature-card {
  background-color: #fff;
  border-radius: 8px;
  padding: 2rem;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
  transition: transform 0.3s, box-shadow 0.3s;
}

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

.feature-card .icon {
  font-size: 2.5rem;
  color: var(--primary-color);
  margin-bottom: 1.5rem;
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.about {
  background-color: var(--secondary-color);
  color: var(--text-light);
}

.about-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 40px;
  align-items: center;
}

.about-text {
  max-width: 600px;
}

.about h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
  color: var(--primary-color);
}

.about p {
  margin-bottom: 1rem;
}

.cta {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--secondary-color) 100%);
  color: var(--text-light);
  text-align: center;
}

.cta h2 {
  font-size: 2rem;
  margin-bottom: 1.5rem;
}

.cta p {
  margin-bottom: 2rem;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-block;
  padding: 0.8rem 1.8rem;
  background-color: var(--primary-color);
  color: var(--secondary-color);
  border-radius: 4px;
  text-decoration: none;
  font-weight: bold;
  transition: background-color 0.3s;
}

.btn:hover {
  background-color: #E3AA1F;
}

.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(--secondary-color);
}

footer {
  background-color: var(--secondary-color);
  color: var(--text-light);
  padding: 3rem 0 1.5rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 2rem;
}

.footer-column h3 {
  color: var(--primary-color);
  margin-bottom: 1.5rem;
  font-size: 1.3rem;
}

.footer-column ul {
  list-style: none;
}

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

.footer-column a {
  color: var(--text-light);
  text-decoration: none;
  transition: color 0.3s;
}

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

.copyright {
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  font-size: 0.9rem;
  color: #999;
}

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

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

/* 媒体查询，实现响应式设计 */
@media (max-width: 768px) {
  .header-content {
    flex-direction: column;
    gap: 15px;
  }
  
  nav ul {
    flex-wrap: wrap;
    justify-content: center;
  }
  
  .hero h2 {
    font-size: 2rem;
  }
  
  .hero p {
    font-size: 1rem;
  }
  
  .features-grid, 
  .about-content {
    grid-template-columns: 1fr;
  }
  
  .footer-content {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 480px) {
  .footer-content {
    grid-template-columns: 1fr;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-buttons a {
    width: 100%;
    max-width: 250px;
  }
}

/* 图标样式 */
.feature-icon {
  width: 60px;
  height: 60px;
  margin: 0 auto 1.5rem;
}

/* 下载按钮样式 */
.download-btn {
  display: inline-block;
  transition: transform 0.3s;
}

.download-btn:hover {
  transform: translateY(-3px);
}

.download-btn img {
  max-width: 200px;
  border-radius: 8px;
}