.page-content {
  max-width: 1200px;
  margin: 0 auto;
}
/* 响应式设计 */
@media (max-width: 768px) {
  .page-content {
    padding: 0 15px;
  }

  .feature-item,
  .benefit-item {
    flex-direction: column;
  }
}

/* 动画效果 */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  animation: fadeIn 1s ease forwards;
}

.slide-in {
  opacity: 0;
  transform: translateX(-30px);
  animation: slideIn 1s ease forwards;
}

@keyframes fadeIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes slideIn {
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* 产品展示区样式 */
.hero {
  width: 100%;
  height: 620px;
  display: flex;
  align-items: center;
  background: linear-gradient(180deg, #e0edff 0%, #fff 100%);
}

.product-intro {
  width: 100%;
  display: flex;
  justify-content: center;
  align-items: center;
}

.product-image {
  width: 598px;
  height: 500px;
  transition: transform 0.3s ease;
}

.product-image:hover {
  transform: scale(1.05);
}
.hero-text {
  margin-top: 49px;
  margin-left: 100px;
}
.hero-text h2 {
  color: #1f2329;
  font-size: 32px;
  font-style: normal;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: 0.64px;
}
.hero-text p {
  color: #5c5d5f;
  font-size: 18px;
  font-style: normal;
  font-weight: 500;
  line-height: 16px; /* 88.889% */
  letter-spacing: 1.44px;
  margin-top: 20px;
}

/* 独特匠心美容神器 */
.artifact {
  background: #f8f9fa;
  background-image: url("../images/kneepad/bg2.png");
  width: 100%;
  background-size: cover;
  background-position: center 50%;
  background-repeat: no-repeat;
  height: 660px;
  position: relative;
}
.artifact-box {
  position: absolute;
  top: 30%;
  left: 53%;
  color: #1f2329;
}
.artifact-box h2 {
  font-size: 32px;
  font-style: normal;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: 0.64px;
  margin-bottom: 20px;
}
.artifact-box p {
  color: #5c5d5f;
  font-size: 18px;
  font-style: normal;
  font-weight: 400;
  line-height: 36px;
}
/* 特性区域样式 */
.features {
  padding: 80px 0;
  background: #f8f9fc;
}
.features-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.graph-container img {
  width: 617px;
  height: 400px;
}
.feature-item h2 {
  color: #1f2329;
  font-size: 32px;
  font-style: normal;
  font-weight: 600;
  letter-spacing: 0.64px;
  margin-bottom: 20px;
}
.feature-item p {
  width: 498px;
  color: #5c5d5f;
  font-size: 18px;
  font-style: normal;
  font-weight: 400;
  line-height: 32px;
}

/* 医学院校研究使用相关产品 */

.book-box,
.phototherapy-box {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.book {
  padding: 70px 0;
}

.book-item {
  /* flex: 0.8; */
}
.book img {
  width: 366px;
  height: 520px;
}
.book-item h2 {
  color: #1f2329;
  font-size: 32px;
  font-style: normal;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: 0.64px;
  margin-bottom: 20px;
}
.book-item p {
  color: #5c5d5f;
  font-size: 18px;
  font-style: normal;
  font-weight: 400;
  line-height: 36px;
}

/* 多层面料，关节保暖锁温 */
.phototherapy {
  background: linear-gradient(0deg, #f8f9fc 0%, #f8f9fc 100%);
  padding: 70px 0;
}
.phototherapy img {
  width: 501px;
  height: 560px;
}
.phototherapy-img {
  flex: 0.7;
  padding-left: 100px;
}
.phototherapy-item {
  flex: 0.7;
  text-align: left;
}
.phototherapy-item h2 {
  color: #1f2329;
  font-size: 32px;
  font-style: normal;
  font-weight: 600;
  line-height: 48px;
  letter-spacing: 0.64px;
  margin-bottom: 20px;
}
.phototherapy-item p {
  color: #5c5d5f;
  font-size: 18px;
  font-style: normal;
  font-weight: 400;
  line-height: 36px;
}

/* 新1机3用设计「护膝」 */
.kneepad {
  background-image: url("../images/kneepad/bg5.png");
  width: 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  height: 1010px;
  animation: backgroundfadeIn 2s ease-out forwards;
}

.elbow {
  background-image: url("../images/kneepad/bg6.png");
  width: 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  height: 920px;
  animation: backgroundfadeIn 4s ease-out forwards;
}
.shoulder {
  background-image: url("../images/kneepad/bg7.png");
  width: 100%;
  background-size: cover;
  background-position: center center;
  background-repeat: no-repeat;
  height: 1010px;
  animation: backgroundfadeIn 6s ease-out forwards;
}

@keyframes backgroundfadeIn {
  from {
    opacity: 0;
  }
  to {
    opacity: 1;
  }
}