.product-gallery {
  width: 100%;
  height: 100vh;
}

.container {
  width: 100%;
  height: 100%;
}

.container-top,
.container-bottom {
  height: 50%;
  display: flex;
}

.w50p {
  width: 50%;
}

.w25p {
  width: 25%;
}

.qsk95-box,
.qsb7-box {
  width: 25%;
}

.product-tile {
  position: relative;
  height: 100%;
  padding: 0;
  display: flex;
  align-items: flex-end;
  overflow: hidden;
  background: #010409;
  box-shadow: 0 1.125rem 2.5rem rgba(15, 23, 42, 0.18); /* 18px 40px */
  transition:
    transform var(--transition),
    box-shadow var(--transition);
}

.product-tile::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    0deg,
    rgba(1, 4, 9, 0.65) 0%,
    rgba(1, 4, 9, 0.35) 55%,
    rgba(1, 4, 9, 0) 100%
  );
  opacity: 0;
  z-index: 1;
  transition: opacity 0.4s ease;
}

.product-tile:hover::after {
  opacity: 1;
}

.product-tile__image {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.product-tile:hover .product-tile__image {
  transform: scale(1.03);
}

.product-tile__body {
  position: relative;
  z-index: 2;
  color: #fff;
  padding: 2rem 2rem 1.25rem; /* 32px 32px 20px */
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 0.75rem; /* 12px */
  align-items: flex-start;
  transform: translateY(3rem); /* 48px */
  transition: transform 0.5s ease;
}

.product-tile__body h3 {
  margin: 0;
  font-size: 1.2rem;
  letter-spacing: 0.08em;
}

.product-tile__body p {
  margin: 0;
  color: rgba(255, 255, 255, 0.8);
}

.product-tile__link {
  /* font-weight: 600; */
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem; /* 8px */
  margin-top: 0.5rem; /* 8px */
  padding: 0.5rem 1.125rem; /* 8px 18px */
  border-radius: 62.4375rem; /* 999px */
  border: 0.0625rem solid rgba(255, 255, 255, 0.6);
  background-color: rgba(15, 23, 42, 0.15);
  backdrop-filter: blur(0.375rem); /* 6px */
  transform: translateY(1rem); /* 16px */
  opacity: 0;
  pointer-events: none;
  transition:
    transform 0.5s ease,
    opacity 0.3s ease,
    border-color 0.5s ease;
}

/* --------------------------------------------------------------------------- */
.product-tile:hover .product-tile__link {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
  border-color: rgba(255, 255, 255, 0.9);
  box-shadow: 0 0.5rem 1.5rem rgba(15, 23, 42, 0.35); /* 8px 24px */
}

.product-tile:hover .product-tile__body {
  transform: translateY(-1rem); /* 16px */
}

.product-tile__link:hover {
  border-color: #fff;
  background-color: rgba(255, 255, 255, 0.26);
}

.systems-intro {
  padding-top: 2.5rem; /* 40px */
}

.systems-intro__header {
  max-width: 45rem; /* 720px */
  margin: 0 auto;
  text-align: center;
}

.system-feature__item {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-around;
  /* gap: 3rem; 48px */
  align-items: center;
  padding: 3rem; /* 48px */
  border: 0.0625rem solid var(--color-border); /* 1px */
  background-color: #fff;
  box-shadow: 0 1.125rem 3rem rgba(15, 23, 42, 0.08); /* 18px 48px */
}

.system-feature__item--new-energy {
  flex-direction: column;
  align-items: stretch;
  gap: 2rem; /* 32px */
  overflow: hidden;
}

.system-feature__item--marine-power {
  gap: 10%;
}

.system-feature__item--new-energy .system-feature__body,
.system-feature__item--new-energy .system-feature__slider {
  flex: 1 1 auto;
  max-width: 100%;
}

.system-feature__item--new-energy .system-feature__body {
  flex: 0 0 auto;
  text-align: center;
}

.text-right {
  text-align: right;
}

.system-feature__item--new-energy .system-feature__slider {
  flex: 1 1 auto;
  min-height: 0;
}

.system-feature__slider {
  width: 100%;
}

.energy-slider {
  position: relative;
  padding: 0 5rem 4rem; /* 80px 64px */
}

.energy-slider__viewport {
  position: relative;
  width: 100%;
  /* height: 33.75rem; 540px */
  height: 68vh;
  overflow: visible;
}

.energy-slider__track {
  position: relative;
  width: 100%;
  height: 100%;
}

.energy-slider__slide {
  position: absolute;
  inset: 0;
  left: 50%;
  /* width: min(70%, 42.5rem); 680px */
  width: 70%;
  border-radius: 1.75rem; /* 28px */
  overflow: hidden;
  background: #f0f2f4;
  transform-origin: center;
  transform: translateX(-50%) translate3d(calc(var(--offset, 0) * 55%), 0, 0)
    scale(calc(1 - min(var(--abs-offset, 0), 1) * 0.08));
  opacity: calc(1 - min(var(--abs-offset, 0), 1) * 0.45);
  box-shadow: 0 1.25rem 2.8125rem rgba(15, 23, 42, 0.15); /* 20px 45px */
  transition:
    transform 0.6s cubic-bezier(0.22, 1, 0.36, 1),
    opacity 0.4s ease,
    box-shadow 0.4s ease;
  z-index: calc(100 - var(--abs-offset, 0));
  display: flex;
  align-items: center;
  padding: 0.625rem; /* 10px */
}

/* --------------------------------------------------------- */

.energy-slider__slide.is-active {
  opacity: 1;
  box-shadow: 0 1.875rem 4.375rem rgba(15, 23, 42, 0.22); /* 30px 70px */
}

.energy-slider__slide.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.energy-slider__slide img {
  width: 100%;
  /* height: 100%; */
  object-fit: cover;
  display: block;
}

.energy-slider__nav {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 3rem; /* 48px */
  height: 3rem; /* 48px */
  border-radius: 999px;
  border: 0.0625rem solid rgba(15, 23, 42, 0.1); /* 1px */
  background: rgba(255, 255, 255, 0.95);
  color: #0f172a;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition:
    background 0.3s ease,
    color 0.3s ease,
    transform 0.3s ease;
  box-shadow: 0 0.9375rem 2.1875rem rgba(15, 23, 42, 0.15); /* 15px 35px */
  z-index: 200;
}

.energy-slider__nav:hover {
  background: #0f172a;
  color: #fff;
}

.energy-slider__nav--prev {
  left: 1.5rem; /* 24px */
}

.energy-slider__nav--next {
  right: 1.5rem; /* 24px */
}

.energy-slider__dots {
  position: absolute;
  left: 5rem; /* 80px */
  right: 5rem; /* 80px */
  bottom: 1rem; /* 16px */
  display: flex;
  justify-content: center;
  gap: 0.625rem; /* 10px */
}

.energy-slider__dot {
  width: 0.9375rem; /* 15px */
  height: 0.125rem; /* 2px */
  /* border-radius: 999px; */
  border: none;
  background: rgba(15, 23, 42, 0.25);
  cursor: pointer;
  transition:
    transform 0.3s ease,
    background 0.3s ease;
}

.energy-slider__dot.is-active {
  background: var(--color-primary, #0d6efd);
  transform: scale(1.3);
}

@media (max-width: 64rem) {
  /* 1024px */
  .energy-slider {
    padding: 0 2.5rem 3.5rem; /* 40px 56px */
  }

  .energy-slider__slide {
    width: min(80%, 35rem); /* 560px */
  }
}

@media (max-width: 40rem) {
  /* 640px */
  .energy-slider {
    padding: 0 0 3rem; /* 48px */
  }

  .energy-slider__slide {
    width: 100%;
  }

  .energy-slider__viewport {
    height: 17.5rem; /* 280px */
  }

  .energy-slider__nav {
    display: none;
  }

  .energy-slider__dots {
    left: 0;
    right: 0;
  }
}

.system-feature__item--reverse {
  flex-direction: row-reverse;
}

/* .system-feature__media,
.system-feature__body {
  flex: 1 1 20rem; 320px
} */

.system-feature__media {
  width: 50%;
}

.system-feature__media img {
  width: 100%;
  border-radius: 1.75rem; /* 28px */
  display: block;
}

.system-feature__body h3 {
  margin-bottom: 1rem; /* 16px */
  font-size: 1.8rem;
}

.system-feature__body p {
  margin-bottom: 1.5rem; /* 24px */
  color: var(--color-muted);
}

.system-feature__link {
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem; /* 8px */
  padding: 0.625rem 1.375rem; /* 10px 22px */
  border-radius: 999px;
  box-shadow: inset 0 0 0 0.0625rem rgba(209, 213, 219, 0.8); /* 1px */
  letter-spacing: 0.1em;
}

.system-feature__link:hover {
  background: #f3f4f6;
}

.system-marine-power {
  position: relative;
}

.system-marine-power__image {
  width: 100%;
  height: auto;
}

/* ------------------------------------------------------------------------ */

.system-marine-power-container {
  position: absolute;
  top: 6.25rem; /* 100px */
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  color: #fff;
}

.system-marine-power__title {
  font-size: 2rem; /* 32px */
  font-weight: 600;
  margin-bottom: 0.75rem; /* 12px */
  text-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.5); /* 2px 4px */
}

.system_marine__title-desc {
  font-size: 1.25rem; /* 20px */
  text-shadow: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.5);
}

.system-marine-power__link {
  color: #fff;
  letter-spacing: 0.1em;
  padding: 0.625rem 1.375rem; /* 10px 22px */
  border-radius: 999px;
  box-shadow: inset 0 0 0 0.0625rem rgba(255, 255, 255, 0.8); /* 1px */
  background-color: rgba(15, 23, 42, 0.15);
  backdrop-filter: blur(0.375rem); /* 6px */
}

.system-marine-power__link:hover {
  border-color: #fff;
  background-color: rgba(255, 255, 255, 0.26);
}

.system-grid__items {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1.5rem; /* 24px */
}

.system-grid__card {
  border: 0.0625rem solid var(--color-border); /* 1px */
  border-radius: 1.75rem; /* 28px */
  overflow: hidden;
  background-color: #fff;
  display: flex;
  flex-direction: column;
  box-shadow: 0 0.75rem 2rem rgba(15, 23, 42, 0.08); /* 12px 32px */
}

.system-grid__media img {
  width: 100%;
  height: auto;
  display: block;
}

.system-grid__body {
  padding: 1.75rem; /* 28px */
  display: flex;
  flex-direction: column;
  gap: 0.75rem; /* 12px */
}

.system-grid__body p {
  margin: 0;
  color: var(--color-muted);
}

.system-grid__link {
  margin-top: 0.5rem; /* 8px */
  font-weight: 600;
  color: var(--color-primary);
}

/* -------------------底部轮播图----------------- */
.system-gallery {
  width: 100%;
}

.swiper-list-gallery {
  position: relative;
  padding: 1.875rem 0; /* 30px */
  overflow: hidden;
}

.swiper-slide-gallery-card:not(.active) {
  opacity: 0.6;
}

.swiper-main-gallery {
  position: relative;
}

.swiper-main-gallery .img-box {
  height: 100%;
  position: absolute;
  top: 0rem; /* 0px */
  border-radius: 0.25rem; /* 4px */
  display: inline-block;
  overflow: hidden;
  box-shadow:
    0 0.25rem 0.5rem 0 rgba(0, 0, 0, 0.2),
    0 0.375rem 1.25rem 0 rgba(0, 0, 0, 0.19); /* 4px 8px 6px 20px */
}

.btn-gallery {
  position: absolute;
  top: 50%;
  display: flex;
  width: 3rem; /* 48px */
  height: 3rem; /* 48px */
  border-radius: 50%;
  align-items: center;
  justify-content: center;
  font-size: 3.125rem; /* 50px */
  color: #191919;
  background-color: hsla(0, 0%, 92.5%, 0.6);
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
  cursor: pointer;
}

.btn-gallery:hover {
  background-color: #e5e7eb;
}

.leftBtn-gallery {
  left: calc(15% + 1.5rem); /* 24px */
}

.rightBtn-gallery {
  right: calc(15% + 1.5rem); /* 24px */
}

.img-title-gallery-card {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    0deg,
    rgba(1, 4, 9, 0) 50%,
    rgba(1, 4, 9, 0.15) 65%,
    rgba(1, 4, 9, 0.85) 100%
  );
  padding: 4.375rem 10%; /* 70px */
  display: flex;
  flex-direction: column;
  align-items: center;
}

.img-title-gallery-card-text {
  font-size: 2rem; /* 32px */
  color: #fff;
  text-align: center;
}

.img-title-gallery-card-dec {
  font-size: 1.625rem; /* 26px */
  color: #fff;
  text-align: center;
}

.img-title-gallery-card__link {
  color: #fff;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem; /* 8px */
  margin-top: 0.5rem; /* 8px */
  padding: 0.5rem 1.125rem; /* 8px 18px */
  border-radius: 999px;
  border: 0.0625rem solid rgba(255, 255, 255, 0.6); /* 1px */
  background-color: rgba(15, 23, 42, 0.15);
  backdrop-filter: blur(0.375rem); /* 6px */
  transform: translateY(1rem); /* 16px */
  pointer-events: none;
  transition:
    transform 0.5s ease,
    opacity 0.3s ease,
    border-color 0.5s ease;
}

.img-title-gallery-card__link:hover {
  background-color: rgba(255, 255, 255, 0.26);
}

.swiper-main-gallery .swiper-img-class {
  object-fit: cover;
  transition: transform 0.6s ease;
}

.swiper-main-gallery .img-title-gallery-card-text,
.swiper-main-gallery .img-title-gallery-card-dec {
  transition:
    transform 0.45s ease,
    opacity 0.4s ease;
}

.swiper-main-gallery .img-title-gallery-card__link {
  opacity: 0;
  pointer-events: none;
  transform: translateY(1.125rem); /* 18px */
}

.swiper-main-gallery .img-box:hover .swiper-img-class {
  transform: scale(1.06);
}

.swiper-main-gallery .img-box:hover .img-title-gallery-card-text,
.swiper-main-gallery .img-box:hover .img-title-gallery-card-dec {
  transform: translateY(0.375rem); /* 6px */
}

.swiper-main-gallery .img-box:hover .img-title-gallery-card__link {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}

/*------------------------------------------------ */

/* ===============================
   产品页移动端适配
================================ */
@media (max-width: 768px) {
  /* 取消整体高度限制 */
  .product-gallery,
  .container,
  .container-top,
  .container-bottom {
    height: auto;
  }

  .container-top,
  .container-bottom {
    flex-direction: column;
  }

  .w50p,
  .w25p {
    width: 100%;
  }

  .product-tile {
    height: 60vh;
    min-height: 320px;
  }

  /* ===== 关键修改：按钮直接显示 ===== */

  .product-tile__body {
    transform: translateY(0);
  }

  .product-tile__link {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }

  .system-marine-power-container {
    top: 2rem;
    width: 80%;
    text-align: center;
  }
  .system-marine-power__image {
    height: 20rem;
  }
  .system_marine__title-desc {
    margin-top: 0;
    margin-bottom: 1rem;
  }
  .swiper-main-gallery {
    height: 20rem !important;
  }
  .swiper-img-class {
    height: 100%;
  }
  .img-title-gallery-card {
    padding: 10%;
  }
  .img-title-gallery-card-text {
    font-size: 1.6rem;
  }
  .img-title-gallery-card-dec {
    font-size: 1rem;
  }
  .leftBtn-gallery {
    left: calc(15% + 0.5rem);
  }
  .rightBtn-gallery {
    right: calc(15% + 0.5rem);
  }
  .swiper-main-gallery .img-title-gallery-card__link {
    opacity: 1;
    transform: translateY(0);
    margin-top: 1rem;
  }
}