/* ============================================
   加值应用页样式
   ============================================ */

/* 快速导航 */
.va-nav {
  background: #f5f7fa;
  border-bottom: 1px solid #e0e6ed;
}

.va-nav-grid {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.va-nav-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  background: #fff;
  border-radius: 50px;
  color: #333;
  font-weight: 600;
  font-size: 15px;
  text-decoration: none;
  border: 2px solid #e0e6ed;
  transition: all 0.3s ease;
}

.va-nav-item:hover {
  border-color: var(--primary);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(13, 71, 161, 0.15);
}

.va-nav-item i {
  font-size: 18px;
  color: var(--primary);
}

/* 产品卡片网格 */
.va-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
  margin-top: 40px;
}

.va-card {
  background: #fff;
  border-radius: 16px;
  padding: 36px 30px 30px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}

.va-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: attr(data-color);
  opacity: 0;
  transition: opacity 0.3s;
}

.va-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 36px rgba(0, 0, 0, 0.1);
}

.va-card:hover::before {
  opacity: 1;
}

.va-card-icon {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 28px;
  color: #fff;
  margin-bottom: 20px;
}

.va-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: #1a1a2e;
  margin-bottom: 8px;
}

.va-card-desc {
  font-size: 14px;
  color: #666;
  line-height: 1.6;
  margin-bottom: 18px;
}

/* 特性列表 */
.va-card-features {
  margin-bottom: 22px;
}

.va-feature {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 6px 0;
  font-size: 14px;
  color: #444;
  line-height: 1.5;
}

.va-feature i {
  color: var(--primary);
  margin-top: 3px;
  font-size: 12px;
  flex-shrink: 0;
}

/* CTA区域 */
.va-cta {
  background: linear-gradient(135deg, #0d47a1, #1565c0);
  color: #fff;
  text-align: center;
}

.va-cta h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

.va-cta p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 28px;
}

.va-cta-buttons {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-outline-white {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.6);
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: all 0.3s;
}

.btn-outline-white:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: #fff;
}

/* 交替背景 */
.va-category.alt {
  background: #f8fafc;
}

/* ============ 响应式 ============ */

@media (max-width: 1024px) {
  .va-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
  }
}

@media (max-width: 768px) {
  .va-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .va-nav-grid {
    gap: 10px;
  }

  .va-nav-item {
    padding: 8px 18px;
    font-size: 14px;
  }

  .va-cta h2 {
    font-size: 24px;
  }

  .va-cta-buttons {
    flex-direction: column;
    align-items: center;
  }
}