:root {
  --primary-color: #F3BA2F;
  --secondary-color: #13151C;
  --text-color: #333;
  --text-light: #fff;
  --bg-dark: #13151C;
  --bg-light: #f9f9f9;
  --transition: all 0.3s ease;
  --shadow: 0 5px 15px rgba(0,0,0,0.1);
  --border-radius: 8px;
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.6;
  color: var(--text-color);
  background-color: var(--bg-light);
  overflow-x: hidden;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: var(--transition);
}

a:hover {
  color: #d19e1f;
}

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

/* 导航栏 */
.navbar {
  background-color: var(--bg-dark);
  padding: 15px 0;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

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

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

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

.logo-text {
  color: var(--text-light);
  font-size: 1.5rem;
  font-weight: bold;
}

.nav-links {
  display: flex;
  align-items: center;
}

.nav-links a {
  color: var(--text-light);
  margin-left: 20px;
  font-weight: 500;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--primary-color);
  transition: var(--transition);
}

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

.language-switch {
  position: relative;
  margin-left: 20px;
}

.language-switch a {
  display: flex;
  align-items: center;
  color: var(--text-light);
}

.language-switch a svg {
  margin-left: 5px;
  width: 12px;
  height: 12px;
  fill: var(--text-light);
}

/* 移动菜单按钮 */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-light);
  font-size: 24px;
  cursor: pointer;
}

/* 英雄区域 */
.hero {
  background-image: url('../images/binance-bg.svg');
  background-size: cover;
  background-position: center;
  padding: 160px 0 100px;
  text-align: center;
  color: var(--text-light);
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
}

.hero h1 {
  font-size: 2.8rem;
  margin-bottom: 20px;
  color: var(--text-light);
}

.hero p {
  font-size: 1.2rem;
  margin-bottom: 30px;
  color: rgba(255, 255, 255, 0.8);
}

.btn {
  display: inline-block;
  background-color: var(--primary-color);
  color: var(--bg-dark);
  padding: 12px 30px;
  border-radius: var(--border-radius);
  font-weight: bold;
  text-transform: uppercase;
  letter-spacing: 1px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}

.btn:hover {
  background-color: #e6ae29;
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}

.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(--bg-dark);
}

/* 功能特性 */
.features {
  padding: 80px 0;
  background-color: var(--bg-light);
}

.section-title {
  text-align: center;
  margin-bottom: 50px;
}

.section-title h2 {
  font-size: 2.2rem;
  color: var(--text-color);
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -10px;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background-color: var(--primary-color);
}

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

.feature-card {
  background-color: white;
  border-radius: var(--border-radius);
  padding: 30px;
  box-shadow: var(--shadow);
  transition: var(--transition);
  text-align: center;
}

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

.feature-icon {
  margin-bottom: 20px;
}

.feature-icon svg {
  width: 60px;
  height: 60px;
  fill: var(--primary-color);
}

.feature-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

/* 下载部分 */
.download {
  padding: 80px 0;
  background-color: var(--bg-dark);
  color: var(--text-light);
}

.download-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 30px;
}

.download-card {
  text-align: center;
  background-color: rgba(255, 255, 255, 0.05);
  border-radius: var(--border-radius);
  padding: 30px;
  transition: var(--transition);
}

.download-card:hover {
  background-color: rgba(255, 255, 255, 0.1);
}

.download-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.download-card p {
  margin-bottom: 20px;
  color: rgba(255, 255, 255, 0.7);
}

/* 页脚 */
.footer {
  background-color: var(--secondary-color);
  color: var(--text-light);
  padding: 60px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.footer-col h4 {
  font-size: 1.2rem;
  margin-bottom: 20px;
  color: var(--primary-color);
}

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

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

.footer-col ul li a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-col ul li a:hover {
  color: var(--primary-color);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 20px;
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 0.9rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  margin-bottom: 20px;
}

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

/* 响应式设计 */
@media (max-width: 992px) {
  .hero h1 {
    font-size: 2.3rem;
  }
  
  .hero p {
    font-size: 1.1rem;
  }
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: block;
  }
  
  .nav-links {
    position: absolute;
    top: 70px;
    left: 0;
    width: 100%;
    background-color: var(--bg-dark);
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
    transform: translateY(-150%);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
  }
  
  .nav-links.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }
  
  .nav-links a {
    margin: 10px 0;
  }
  
  .language-switch {
    margin: 10px 0;
  }
  
  .hero {
    padding: 130px 0 80px;
  }
  
  .hero h1 {
    font-size: 2rem;
  }
  
  .section-title h2 {
    font-size: 1.8rem;
  }
}

@media (max-width: 576px) {
  .hero h1 {
    font-size: 1.8rem;
  }
  
  .btn {
    padding: 10px 25px;
    font-size: 0.9rem;
  }
}