:root {
  --product-teal: #009b8c;
  --product-teal-deep: #007d72;
  --product-night: #171b1c;
  --product-panel: #202628;
  --product-ivory: #f4f1e9;
}

.product-page-hero {
  min-height: 330px;
  position: relative;
  display: grid;
  align-items: end;
  overflow: hidden;
  background: #121617;
  color: #fff;
}

.product-page-hero__image,
.product-page-hero::after {
  position: absolute;
  inset: 0;
}

.product-page-hero__image { width: 100%; height: 100%; object-fit: cover; opacity: .44; filter: saturate(.72) contrast(1.08); }
.product-page-hero::after { content: ""; background: linear-gradient(90deg, rgba(12,15,15,.88), rgba(12,15,15,.55) 58%, rgba(12,15,15,.78)); }
.product-page-hero .shell { position: relative; z-index: 1; padding: 54px 0 50px; }
.product-page-hero .eyebrow { color: #63ead8; margin-bottom: 12px; }
.product-page-hero h1 { margin: 0; font: 700 clamp(38px,5vw,70px)/1.05 Georgia, "Times New Roman", "Microsoft YaHei", serif; letter-spacing: -.035em; max-width: 730px; }
.product-page-hero p:last-child { max-width: 620px; margin: 18px 0 0; color: #e6eeea; font-size: 16px; }

.product-intro { position: relative; overflow: hidden; padding: 72px 0 125px; background: var(--product-night); color: #fff; }
.product-intro::after { content: ""; position: absolute; z-index: 1; bottom: -3px; left: -1px; width: calc(100% + 2px); height: 97px; background: var(--product-teal); clip-path: polygon(0 18%, 50% 100%, 100% 18%, 100% 100%, 0 100%); }
.product-intro__crumb { color: #dbe8e4; font-size: 13px; margin-bottom: 51px; }
.product-intro__crumb span { color: #48e6d2; padding: 0 8px; }
.product-intro__head { text-align: center; max-width: 740px; margin: 0 auto 48px; }
.product-intro__head p { color: #63ead8; font-size: 11px; font-weight: 800; letter-spacing: .19em; margin: 0 0 14px; }
.product-intro__head h2 { margin: 0; font: 700 clamp(34px,4vw,56px)/1.08 Georgia, "Times New Roman", "Microsoft YaHei", serif; }
.product-intro__features { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3,1fr); gap: 54px; }
.product-intro__feature { position: relative; padding-left: 1px; }
.product-intro__check { width: 25px; height: 25px; margin: 0 0 16px; border-radius: 50%; display: grid; place-items: center; background: #55f0dc; color: #102321; font-weight: 900; font-size: 14px; }
.product-intro__feature h3 { margin: 0 0 10px; font-size: 18px; color: #fff; }
.product-intro__feature p { margin: 0; color: #bfcac6; line-height: 1.8; font-size: 14px; }

.product-intro + .product-range { position: relative; margin-top: -2px; }
.product-range { padding: 68px 0 94px; background: var(--product-teal); color: #fff; overflow: hidden; }
.product-range--flange { padding-top: 74px; }
.product-range__top { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin-bottom: 29px; }
.product-range__top p { margin: 0 0 8px; color: #b9fff6; font-size: 11px; letter-spacing: .18em; font-weight: 800; }
.product-range__top h2 { margin: 0; font: 700 clamp(36px,4vw,58px)/1 Georgia, "Times New Roman", "Microsoft YaHei", serif; }
.product-range__top > span { max-width: 420px; color: #dcfffb; font-size: 14px; line-height: 1.8; }
.product-slider { position: relative; }
.product-slider__viewport { overflow: hidden; }
.product-slider__track { display: flex; gap: 28px; transition: transform .62s cubic-bezier(.16,1,.3,1); will-change: transform; }
.product-slider__card { flex: 0 0 calc((100% - 56px) / 3); min-width: 0; color: #fff; text-decoration: none; outline: none; }
.product-slider__media { aspect-ratio: 1.15 / 1; display: grid; place-items: center; overflow: hidden; background: #fff; padding: 24px; box-shadow: 0 25px 45px rgba(0,0,0,.12); }
.product-slider__media img { width: 100%; height: 100%; object-fit: contain; transition: transform .5s cubic-bezier(.16,1,.3,1); }
.product-slider__card:hover .product-slider__media img, .product-slider__card:focus-visible .product-slider__media img { transform: scale(1.075) rotate(-1.5deg); }
.product-slider__meta { display: grid; grid-template-columns: 1fr auto; gap: 14px; padding: 17px 0 0; border-top: 1px solid rgba(255,255,255,.34); margin-top: 15px; }
.product-slider__meta h3 { margin: 0; font-size: 17px; color: #fff; }
.product-slider__meta b { color: #bafff6; font-size: 20px; font-weight: 400; }
.product-slider__meta p { grid-column: 1/-1; min-height: 45px; margin: -3px 0 0; color: #d8fffa; font-size: 13px; line-height: 1.65; }
.product-slider__nav { position: absolute; top: 42%; z-index: 2; width: 44px; height: 44px; display: grid; place-items: center; border: 1px solid rgba(255,255,255,.6); border-radius: 50%; background: #17201f; color: #fff; font-size: 29px; line-height: 1; cursor: pointer; transition: .25s; }
.product-slider__nav:hover { background: #fff; color: var(--product-teal); transform: scale(1.08); }
.product-slider__nav:disabled { opacity: .38; cursor: default; transform: none; }
.product-slider__nav--prev { left: -68px; }
.product-slider__nav--next { right: -68px; }

.product-flange-intro { padding: 92px 0 76px; background: #171b1c; color: #fff; text-align: center; }
.product-flange-intro p:first-child { margin: 0 0 15px; color: #58ead8; font-size: 11px; letter-spacing: .2em; font-weight: 800; }
.product-flange-intro h2 { margin: 0; font: 700 clamp(37px,4vw,58px)/1 Georgia, "Times New Roman", "Microsoft YaHei", serif; }
.product-flange-intro__features { display: grid; grid-template-columns: repeat(3,1fr); gap: 32px; margin-top: 55px; text-align: left; }
.product-flange-intro__features article { border-top: 1px solid rgba(255,255,255,.22); padding-top: 18px; }
.product-flange-intro__features b { display: block; color: #fff; font-size: 16px; margin-bottom: 8px; }
.product-flange-intro__features span { color: #bcc7c4; font-size: 13px; line-height: 1.72; }

.product-materials { padding: 100px 0 108px; background: #171b1c; color: #fff; }
.product-materials__head { text-align: center; max-width: 820px; margin: 0 auto 42px; }
.product-materials__head p { margin: 0 0 13px; color: #57e9d6; font-size: 11px; font-weight: 800; letter-spacing: .18em; }
.product-materials__head h2 { margin: 0; font: 700 clamp(35px,4vw,56px)/1.05 Georgia, "Times New Roman", "Microsoft YaHei", serif; }
.product-materials__head span { display: block; margin-top: 19px; color: #c4cfcb; line-height: 1.8; }
.product-materials__grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 18px; }
.product-materials__card { display: block; color: #fff; text-decoration: none; background: #202627; border-bottom: 2px solid transparent; transition: transform .32s ease, border-color .32s ease, background .32s ease; }
.product-materials__card:hover { transform: translateY(-8px); border-color: #53edda; background: #252e2e; }
.product-materials__card img { width: 100%; aspect-ratio: 1 / .83; display: block; object-fit: contain; background: #f9faf8; padding: 16px; }
.product-materials__card span { display: block; padding: 15px 16px 17px; font-weight: 700; }

.product-cta { background: var(--product-teal); color: #fff; overflow: hidden; }
.product-cta .shell { min-height: 340px; display: grid; grid-template-columns: 1.1fr .9fr; align-items: center; gap: 70px; }
.product-cta h2 { margin: 0; font: 700 clamp(38px,4vw,62px)/1.05 Georgia, "Times New Roman", "Microsoft YaHei", serif; max-width: 630px; }
.product-cta p { margin: 20px 0 0; max-width: 570px; color: #ddfffb; line-height: 1.8; }
.product-cta a { justify-self: end; display: inline-flex; align-items: center; gap: 20px; min-height: 58px; padding: 0 27px; background: #fff; color: #16201e; font-size: 13px; font-weight: 800; text-decoration: none; letter-spacing: .08em; transition: transform .25s ease, box-shadow .25s ease; }
.product-cta a:hover { transform: translateY(-4px); box-shadow: 0 16px 34px rgba(0,0,0,.19); }
.product-cta a b { color: var(--product-teal); font-size: 23px; font-weight: 400; }

.product-page .scroll-open-item { opacity: 0; transform: translateY(28px); transition: opacity .6s ease, transform .7s cubic-bezier(.16,1,.3,1); }
.product-page .is-visible .scroll-open-item { opacity: 1; transform: none; }
.product-page .is-visible .scroll-open-item:nth-child(2) { transition-delay: .1s; }
.product-page .is-visible .scroll-open-item:nth-child(3) { transition-delay: .18s; }
.product-page .is-visible .scroll-open-item:nth-child(4) { transition-delay: .26s; }

@media (max-width: 1500px) { .product-slider__nav--prev { left: 10px; } .product-slider__nav--next { right: 10px; } }
@media (max-width: 900px) {
  .product-intro { padding-bottom: 108px; }
  .product-intro__features, .product-flange-intro__features { gap: 24px; }
  .product-slider__card { flex-basis: calc((100% - 28px) / 2); }
  .product-materials__grid { grid-template-columns: repeat(2,1fr); }
  .product-cta .shell { grid-template-columns: 1fr; gap: 30px; padding: 65px 0; }
  .product-cta a { justify-self: start; }
}
@media (max-width: 620px) {
  .product-page-hero { min-height: 280px; }
  .product-page-hero .shell { padding-bottom: 34px; }
  .product-page-hero p:last-child { font-size: 14px; }
  .product-intro { padding: 58px 0 100px; }
  .product-intro__crumb { margin-bottom: 35px; }
  .product-intro__features, .product-flange-intro__features { grid-template-columns: 1fr; gap: 27px; }
  .product-range, .product-range--flange, .product-flange-intro, .product-materials { padding-block: 62px; }
  .product-range__top { display: block; margin-bottom: 25px; }
  .product-range__top > span { display: block; margin-top: 16px; }
  .product-slider__card { flex-basis: 100%; }
  .product-slider__nav { top: 35%; width: 38px; height: 38px; }
  .product-slider__nav--prev { left: 8px; } .product-slider__nav--next { right: 8px; }
  .product-slider__meta p { min-height: auto; }
  .product-materials__grid { grid-template-columns: 1fr; gap: 14px; }
  .product-materials__card { display: grid; grid-template-columns: 43% 1fr; align-items: center; }
  .product-materials__card img { aspect-ratio: 1; }
}
@media (prefers-reduced-motion: reduce) { .product-slider__track, .product-slider__card, .product-materials__card, .product-cta a { transition: none; } }