/* ── About page anchor nav ── */
.zs-about-anchor {
  position: sticky;
  top: 165px;
  z-index: 90;
  background: #fff;
  box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

.zs-about-anchor ul {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  margin: 0;
  padding: 0;
  list-style: none;
}

.zs-about-anchor li a {
  display: block;
  padding: 14px 32px;
  font-size: 15px;
  font-weight: 500;
  color: #555;
  text-decoration: none;
  border-bottom: 3px solid transparent;
  transition: color 0.2s, border-color 0.2s;
}

.zs-about-anchor li a:hover,
.zs-about-anchor li a.is-active {
  color: var(--zs-green, #6baf2e);
  border-bottom-color: var(--zs-green, #6baf2e);
}

@media (max-width: 767px) {
  .zs-about-anchor ul {
    gap: 0;
  }

  .zs-about-anchor li a {
    padding: 12px 16px;
    font-size: 13px;
  }
}

/* ── Factory Show swiper ── */
.zs-factory-show {
  padding: 78px 0 100px;
}

.zs-factory-swiper {
  position: relative;
  margin-top: 50px;
}

.zs-factory-swiper .swiper-container {
  overflow: hidden;
}

.zs-factory-swiper .swiper-slide {
  height: auto;
}

.zs-factory-img {
  width: 100%;
  overflow: hidden;
  border-radius: 6px;
  box-shadow: 0 6px 18px 3px rgba(0, 0, 0, 0.08);
}

.zs-factory-img img {
  display: block;
  width: 100%;
  height: auto;
}

.zs-factory-swiper .zs-swiper-button {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 44px;
  height: 44px;
  cursor: pointer;
}

.zs-factory-swiper .zs-swiper-button.zs-prev {
  left: -60px;
}

.zs-factory-swiper .zs-swiper-button.zs-next {
  right: -60px;
}

.zs-factory-swiper .zs-sol-button-disabled {
  opacity: 0.3;
  cursor: default;
}

@media (max-width: 1440px) {
  .zs-factory-swiper .zs-swiper-button.zs-prev {
    left: -22px;
  }
  .zs-factory-swiper .zs-swiper-button.zs-next {
    right: -22px;
  }
}

@media (max-width: 767px) {
  .zs-factory-show {
    padding: 40px 0 60px;
  }
  .zs-factory-swiper {
    margin-top: 30px;
  }
  .zs-factory-swiper .zs-swiper-button.zs-prev {
    left: 5px;
  }
  .zs-factory-swiper .zs-swiper-button.zs-next {
    right: 5px;
  }
}

/* ── Certifications swiper：去掉卡片内填充，高度自适应 ── */
.zs-about-certificate .swiper-container .swiper-slide {
  height: auto;
}

.zs-about-certificate .swiper-container .zs-img {
  height: auto;
  padding: 0;
}

.zs-about-certificate .swiper-container .zs-img img {
  display: block;
  width: 100%;
  height: auto;
  max-height: none;
}