:root {
  --primary: #1B2A5A;
  --accent: #09D6CA;
  --bg: #f6faff;
  --card: #eaf3fb;
  --text: #222;
  --muted: #7a8ca3;
  --radius: 20px;
  --shadow: 0 4px 24px 0 rgba(27,42,90,0.08);
}

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

body {
  font-family: 'Montserrat', 'Inter', 'PingFang SC', 'Microsoft YaHei', Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  margin: 0;
  padding: 0;
  line-height: 1.6;
}

/* 导航栏样式 */
.navbar {
  background: var(--primary);
  color: #fff;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-shadow: var(--shadow);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 1px;
}

.nav-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.nav-links a {
  color: #fff;
  text-decoration: none;
  font-weight: 500;
  font-size: 1rem;
  padding: 8px 0;
  border-bottom: 2px solid transparent;
  transition: all 0.3s ease;
}

.nav-links a.active,
.nav-links a:hover {
  border-bottom: 2px solid var(--accent);
  color: var(--accent);
}

/* 容器样式 */
.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px 16px;
}

/* 卡片样式 */
.card {
  background: var(--card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  margin-bottom: 24px;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px 0 rgba(27,42,90,0.12);
}

/* 按钮样式 */
.btn {
  display: inline-block;
  background: var(--primary);
  color: #fff;
  border: none;
  border-radius: 12px;
  padding: 14px 28px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  text-align: center;
  text-decoration: none;
  box-shadow: 0 4px 12px rgba(9,214,202,0.2);
}

.btn:hover {
  background: var(--accent);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(9,214,202,0.3);
}

/* 标题样式 */
.title {
  font-size: 2rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary);
}

.subtitle {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 24px 0 12px 0;
  color: var(--primary);
}

.section-title {
  font-size: 2.4rem;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--primary);
}

/* 描述文本样式 */
.desc, .section-desc {
  color: var(--muted);
  font-size: 1.6rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

/* 特色列表样式 */
.feature-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 1.1rem;
  padding: 12px 16px;
  border-radius: 12px;
  background: rgba(255,255,255,0.5);
  transition: transform 0.3s ease, background 0.3s ease;
}

.feature-item:hover {
  transform: translateX(5px);
  background: rgba(255,255,255,0.8);
}

.feature-icon {
  color: var(--accent);
  font-size: 1.8rem;
  display: flex;
  align-items: center;
  justify-content: center;
  min-width: 40px;
}

/* 团队列表样式 */
.team-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.team-list li {
  padding: 12px 16px;
  margin-bottom: 12px;
  border-radius: 12px;
  background: rgba(255,255,255,0.5);
  transition: transform 0.3s ease;
}

.team-list li:hover {
  transform: translateX(5px);
  background: rgba(255,255,255,0.8);
}

/* 联系表单样式 */
.contact-form {
  margin-bottom: 24px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  margin-bottom: 8px;
  font-weight: 500;
  color: var(--primary);
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 2px solid rgba(27,42,90,0.1);
  border-radius: 12px;
  font-family: inherit;
  font-size: 1rem;
  transition: border 0.3s ease;
  background: rgba(255,255,255,0.7);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
  background: #fff;
}

.contact-info {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.contact-info div {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--muted);
}

.contact-info i {
  color: var(--accent);
  font-size: 1.2rem;
}

/* 页脚样式 */
.footer {
  background: var(--primary);
  color: #fff;
  text-align: center;
  padding: 32px 0;
  margin-top: 48px;
  border-radius: 32px 32px 0 0;
}

/* 应用展示区样式 */
.app-showcase {
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.app-icon {
  width: 80px;
  height: 80px;
  border-radius: 20px;
  box-shadow: var(--shadow);
  object-fit: cover;
  flex-shrink: 0;
}

.app-info {
  flex: 1;
  min-width: 0;
}

/* 响应式设计 */
@media (max-width: 768px) {
  .container {
    padding: 16px 12px;
  }
  
  .card {
    padding: 20px 16px;
  }
  
  .title {
    font-size: 1.8rem;
  }
  
  .section-title {
    font-size: 1.3rem;
  }
  
  .app-showcase {
    gap: 16px;
  }
  
  .app-icon {
    width: 64px;
    height: 64px;
  }
}

@media (max-width: 480px) {
  .navbar {
    padding: 0 16px;
    height: 56px;
  }
  
  .nav-logo {
    font-size: 1.3rem;
  }
  
  .nav-links {
    gap: 12px;
  }
  
  .nav-links a {
    font-size: 0.9rem;
  }
  
  .card {
    padding: 16px 12px;
  }
  
  .title {
    font-size: 1.6rem;
  }
  
  .section-title {
    font-size: 1.2rem;
  }
  
  .feature-item {
    font-size: 1rem;
    padding: 10px 12px;
  }
  
  .feature-icon {
    font-size: 1.5rem;
    min-width: 32px;
  }
  
  .btn {
    padding: 12px 20px;
    font-size: 1rem;
  }
  
  .app-icon {
    width: 56px;
    height: 56px;
  }
}