:root {
  --product-features-item-1-bg-image: url("/img/product-features/TT-官网-A3.png");
  --product-features-item-2-bg-image: url("/img/product-features/TT-官网-A5.png");
  --product-features-item-3-bg-image: url("/img/product-features/TT-官网-A2.png");
  --product-features-item-4-bg-image: url("/img/product-features/TT-官网-A4.png");
  --product-features-item-5-bg-image: url("/img/product-features/TT-官网-A6.png");
  --product-features-item-6-bg-image: url("/img/product-features/TT-官网-A1.png");

  --product-features-item-1-hover-bg-image: url("/img/product-features/A3-0透明度.png");
  --product-features-item-2-hover-bg-image: url("/img/product-features/A5-0透明度.png");
  --product-features-item-3-hover-bg-image: url("/img/product-features/A2-0透明度.png");
  --product-features-item-4-hover-bg-image: url("/img/product-features/A4-0透明度.png");
  --product-features-item-5-hover-bg-image: url("/img/product-features/A6-0透明度.png");
  --product-features-item-6-hover-bg-image: url("/img/product-features/A1-0透明度.png");
}

.product-features-items-item {
  height: 150px;
  background-size: cover;
  background-position-y: center;
}

.product-features-items-item:nth-child(1) {
  background-image: var(--product-features-item-1-bg-image);
}
.product-features-items-item:nth-child(2) {
  background-image: var(--product-features-item-2-bg-image);
}
.product-features-items-item:nth-child(3) {
  background-image: var(--product-features-item-3-bg-image);
}
.product-features-items-item:nth-child(4) {
  background-image: var(--product-features-item-4-bg-image);
}
.product-features-items-item:nth-child(5) {
  background-image: var(--product-features-item-5-bg-image);
}
.product-features-items-item:nth-child(6) {
  background-image: var(--product-features-item-6-bg-image);
}

.product-features-items-item .product-features-items-item-title {
  letter-spacing: 0.3rem;
  padding-top: 40px;
}

.product-features-items-item .product-features-items-item-description {
  opacity: 0;
  font-size: 15px;
}

.product-features-items-item:hover .product-features-items-item-description {
  animation: fadeInUp;
  animation-duration: var(--animate-duration);
  animation-fill-mode: both;
}

.product-features-items-item:nth-child(1):hover {
  background-image: var(--product-features-item-1-hover-bg-image) !important;
}
.product-features-items-item:nth-child(2):hover {
  background-image: var(--product-features-item-2-hover-bg-image) !important;
}
.product-features-items-item:nth-child(3):hover {
  background-image: var(--product-features-item-3-hover-bg-image) !important;
}
.product-features-items-item:nth-child(4):hover {
  background-image: var(--product-features-item-4-hover-bg-image) !important;
}
.product-features-items-item:nth-child(5):hover {
  background-image: var(--product-features-item-5-hover-bg-image) !important;
}
.product-features-items-item:nth-child(6):hover {
  background-image: var(--product-features-item-6-hover-bg-image) !important;
}