:root {
  --black-01: #000;
  --black-02: rgba(0, 0, 0, .9);
  --black-03: rgba(0, 0, 0, .6);
  --black-04: rgba(0, 0, 0, .4);
  --white-01: #fff;
  --white-02: rgba(255, 255, 255, .75);
  --white-03: rgba(255, 255, 255, .5);
  --radius: 32px;
  --hero-content: 1680px;
  --content: 1200px;
  --page-inline: 100px;
  --montserrat: "Montserrat", Arial, sans-serif;
  --ui: "PingFang SC", "SF Pro Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html {
  min-width: 1024px;
  scroll-behavior: smooth;
  overflow-x: auto;
}
body { margin: 0; min-width: 1024px; color: var(--black-02); background: #fff; font-family: var(--ui); -webkit-font-smoothing: antialiased; }
button, a { color: inherit; font: inherit; }
button { border: 0; cursor: pointer; }
a { text-decoration: none; }
img { display: block; max-width: 100%; }
h1, h2, h3, p { margin: 0; }
.fixed-section { position: relative; width: 100%; overflow: hidden; }

.site-header {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: center;
  padding: 0 max(var(--page-inline), calc((100vw - var(--hero-content)) / 2));
  pointer-events: none;
  transition: padding .25s cubic-bezier(.16, 1, .3, 1);
}
.site-header__inner {
  pointer-events: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(var(--hero-content), 100%);
  height: 90px;
  padding: 0;
  border-radius: 999px;
  background: transparent;
  transition:
    width .25s cubic-bezier(.16, 1, .3, 1),
    height .25s cubic-bezier(.16, 1, .3, 1),
    padding .25s cubic-bezier(.16, 1, .3, 1),
    background-color .25s cubic-bezier(.16, 1, .3, 1),
    backdrop-filter .25s cubic-bezier(.16, 1, .3, 1);
}
.site-header__logo {
  width: 122px;
  height: 30px;
  flex-shrink: 0;
  transition: transform .25s cubic-bezier(.16, 1, .3, 1);
}
.site-header__logo img { transition: filter .3s ease; }
.site-nav { display: flex; align-items: center; gap: 40px; color: var(--white-02); font-size: 16px; line-height: 1; }
.site-nav a { transition: color .2s ease, border-color .2s ease, background-color .2s ease, opacity .15s ease; }
.site-nav a:hover, .site-nav .is-active { color: #fff; }
.site-nav:has(a:hover) a:not(:hover) { opacity: .55; }
.nav-download {
  display: none;
}
.site-nav__download {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 23px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 999px;
  color: #fff;
  background: transparent;
  font: inherit;
  line-height: 1;
  cursor: pointer;
  transition: padding .25s cubic-bezier(.16, 1, .3, 1), background-color .2s ease, border-color .2s ease, color .2s ease;
}
.site-nav__download:hover,
.nav-download:focus-within .site-nav__download,
.nav-download.is-open .site-nav__download {
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.3);
  color: #fff;
}
.nav-download__popover {
  position: absolute;
  top: calc(100% + 12px);
  right: 0;
  left: 0;
  z-index: 40;
  display: flex;
  width: auto;
  min-height: 178px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 16px 12px 14px;
  border: 1px solid #fff;
  border-radius: 20px;
  color: rgba(0, 0, 0, .6);
  background: rgba(255, 255, 255, .95);
  box-shadow: 0 10px 32px rgba(0, 0, 0, .05);
  -webkit-backdrop-filter: blur(15px);
  backdrop-filter: blur(15px);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(-6px);
  transition: opacity .2s ease, transform .2s ease, visibility .2s ease;
}
.nav-download__popover::before {
  position: absolute;
  top: -12px;
  right: 0;
  left: 0;
  height: 12px;
  content: "";
}
.nav-download__popover img {
  width: min(120px, 100%);
  height: auto;
  aspect-ratio: 1;
  flex: 0 0 auto;
  object-fit: contain;
}
.nav-download__popover p {
  margin-top: 12px;
  color: rgba(0, 0, 0, .5);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: -.13px;
  line-height: 1;
  text-transform: capitalize;
  white-space: nowrap;
}
.nav-download:hover .nav-download__popover,
.nav-download:focus-within .nav-download__popover,
.nav-download.is-open .nav-download__popover {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}
.site-header.is-scrolled {
  padding: 16px max(var(--page-inline), calc((100vw - var(--hero-content)) / 2));
}
.site-header.is-scrolled .site-header__inner {
  width: min(var(--content), 100%);
  height: 64px;
  padding: 6px 40px;
  background: rgba(0, 0, 0, .6);
  -webkit-backdrop-filter: blur(24px) saturate(140%);
  backdrop-filter: blur(24px) saturate(140%);
}
.site-header.is-scrolled .site-header__logo {
  transform: scale(.88);
}
.site-header.is-scrolled .site-header__logo img { filter: none; }
.site-header.is-scrolled .site-nav { color: rgba(255, 255, 255, .72); gap: 32px; }
.site-header.is-scrolled .site-nav a:hover,
.site-header.is-scrolled .site-nav .is-active { color: #fff; }
.site-header.is-scrolled .nav-download { margin-left: 24px; }
.site-header.is-scrolled .site-nav__download {
  padding: 11px 20px;
  color: #fff;
  border-color: rgba(255, 255, 255, .16);
  background: rgba(255, 255, 255, .06);
}
.site-header.is-scrolled .site-nav__download:hover,
.site-header.is-scrolled .nav-download:focus-within .site-nav__download,
.site-header.is-scrolled .nav-download.is-open .site-nav__download {
  background: rgba(255, 255, 255, .12);
  border-color: rgba(255, 255, 255, .3);
}

.hero { position: relative; width: 100%; height: 1080px; overflow: hidden; background: #080909; color: #fff; }
.hero__background { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__content { position: absolute; z-index: 2; top: 50%; left: max(var(--page-inline), calc((100vw - var(--hero-content)) / 2)); width: 860px; transform: translateY(-50%); }
.hero__tag { display: flex; align-items: center; width: max-content; height: 46px; padding: 13px 22px; gap: 8px; border-radius: 30px; background: rgba(255,255,255,.1); }
.hero__tag span { font: 600 16px/1 var(--montserrat); text-transform: uppercase; opacity: .8; }
.hero h1 { margin-top: 24px; width: max-content; max-width: 100%; font: 700 72px/1.06 var(--montserrat); letter-spacing: -.76px; text-transform: capitalize; }
.hero__copy { width: min(720px, 100%); margin-top: 16px; color: var(--white-03); font: 400 18px/1.6 "SF Pro Text", var(--ui); }
.hero__button,
.product-card__button {
  position: relative;
  overflow: hidden;
}
.hero__button::after,
.product-card__button::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: rgba(0, 0, 0, .1);
  opacity: 0;
  transition: opacity .25s ease;
  pointer-events: none;
}
.hero__button:hover::after,
.product-card:hover .product-card__button::after {
  opacity: 1;
}
.hero__button { display: flex; align-items: center; justify-content: center; width: 209px; height: 60px; margin-top: 46px; border-radius: 999px; color: var(--black-02); background: #fff; font: 600 20px/1 var(--ui); }

.section-heading { position: absolute; top: 100px; left: 50%; z-index: 2; width: min(var(--content), calc(100% - 48px)); transform: translateX(-50%); text-align: center; }
.section-heading h2 { font: 700 40px/1 var(--montserrat); text-transform: capitalize; }
.section-heading p { margin-top: 20px; color: var(--black-03); font-size: 14px; line-height: 1; }
.section-heading--dark { color: #fff; }
.section-heading--dark p { color: var(--white-03); }

.products { height: 962px; background: #fff; }
.endorsement { position: absolute; top: 100px; left: 50%; width: var(--content); transform: translateX(-50%); }
.endorsement__line { display: flex; height: 36px; align-items: center; justify-content: center; gap: 12px; color: var(--black-02); font: 600 14px/1 var(--montserrat); }
.endorsement__marquee {
  --endorsement-gap: 56px;
  width: 100%;
  margin-top: 32px;
  overflow: hidden;
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}
.endorsement__track {
  display: flex;
  width: max-content;
  align-items: center;
  gap: var(--endorsement-gap);
  animation: endorsement-scroll 30s linear infinite;
}
.endorsement__track img {
  height: 40px;
  width: auto;
  flex: 0 0 auto;
  object-fit: contain;
}
@keyframes endorsement-scroll {
  from { transform: translateX(0); }
  to { transform: translateX(calc(-50% - var(--endorsement-gap) / 2)); }
}
.products .section-heading { top: 298px; }
.product-grid { position: absolute; top: 452px; left: 50%; display: grid; width: var(--content); grid-template-columns: 1fr 1fr; gap: 20px; transform: translateX(-50%); }
.product-card { position: relative; height: 410px; overflow: hidden; border-radius: var(--radius); color: #fff; }
.product-card > img { width: 100%; height: 100%; object-fit: cover; transition: transform .7s cubic-bezier(.2,.75,.25,1); }
.product-card:hover > img { transform: scale(1.035); }
.product-card__shade { position: absolute; right: 0; bottom: 0; left: 0; height: 120px; background: linear-gradient(180deg, transparent, rgba(0,0,0,.8)); }
.product-card__copy { position: absolute; left: 24px; bottom: 20px; }
.product-card__copy h3 { font: 700 24px/1.2 var(--montserrat); }
.product-card__copy p { margin-top: 6px; font-size: 16px; line-height: 1; }
.product-card__button { position: absolute; right: 20px; bottom: 20px; display: flex; height: 40px; align-items: center; padding: 0 20px; border-radius: 20px; background: #fff; color: #000; font-size: 14px; font-weight: 600; }

.features { height: 1702px; background: #000; }
.features .section-heading { top: 100px; }
.features .section-heading h2 { max-width: 881px; margin-inline: auto; }
.features .section-heading p { max-width: 860px; margin-inline: auto; }
.feature-grid { position: absolute; top: 254px; left: 50%; display: grid; width: var(--content); grid-template-columns: minmax(0, 488fr) minmax(0, 184fr) minmax(0, 488fr); grid-template-rows: repeat(3, 436px); gap: 20px; transform: translateX(-50%); }
.feature-card { position: relative; height: 436px; overflow: hidden; border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius); color: #fff; }
.feature-card--wide { background: linear-gradient(-41.27deg, rgba(255,255,255,.05) 2.62%, rgba(255,255,255,.1) 94.53%); }
.feature-card--narrow { background: linear-gradient(-51.21deg, rgba(255,255,255,.05) 2.62%, rgba(255,255,255,.1) 94.53%); }
.feature-card:nth-child(1) { grid-column: 1 / 3; }
.feature-card:nth-child(2) { grid-column: 3; }
.feature-card:nth-child(3) { grid-column: 1; }
.feature-card:nth-child(4) { grid-column: 2 / 4; }
.feature-card:nth-child(5) { grid-column: 1 / 3; }
.feature-card:nth-child(6) { grid-column: 3; }
.feature-card__copy { position: absolute; z-index: 2; top: 47px; left: 43px; display: flex; flex-direction: column; gap: 16px; }
.feature-card__copy--bottom { top: 309px; }
.feature-card__copy h3 { font: 510 28px/1 "SF Pro Display", var(--ui); }
.feature-card__copy p { color: var(--white-03); font: 400 14px/21px "SF Pro Text", var(--ui); }
.feature-card:nth-child(1) .feature-card__copy { width: 233px; }
.feature-card:nth-child(2) .feature-card__copy { width: 247px; }
.feature-card:nth-child(3) .feature-card__copy { width: 269px; }
.feature-card:nth-child(4) .feature-card__copy { width: 300px; }
.feature-card:nth-child(5) .feature-card__copy { width: 233px; }
.feature-card:nth-child(6) .feature-card__copy { width: 241px; }
.feature-card:nth-child(6) .feature-card__copy h3 { white-space: nowrap; }
.feature-card__visual { position: absolute; max-width: none; object-fit: contain; pointer-events: none; transition: transform .65s cubic-bezier(.2,.75,.25,1); }
.feature-card:hover .feature-card__visual { transform: translateY(-5px); }
.readiness-visual,
.sleep-visual,
.activity-visual,
.period-visual {
  top: auto;
  bottom: -5px;
  object-position: bottom center;
}
.readiness-visual { left: 108px; width: 484px; height: 380px; bottom: -5px; }
.sleep-visual { left: 67px; width: 380px; height: 312px; }
.activity-visual { left: 85px; width: 286px; height: 276px; }
.period-visual { left: 43px; width: 362px; height: 300px; bottom: -5px; }
.hr-visual { top: 0; left: 205px; width: 426px; height: 396px; }
.spo2-visual { top: 0; left: 165px; width: 426px; height: 396px; }

.timeline { height: 1002px; background: #fff; }
.timeline__scale { position: absolute; top: 218px; left: 50%; display: grid; width: var(--content); grid-template-columns: auto minmax(48px, 1fr) auto minmax(48px, 1fr) auto minmax(48px, 1fr) auto minmax(48px, 1fr) auto; align-items: center; gap: 12px; transform: translateX(-50%); white-space: nowrap; }
.timeline__time { padding: 6px 0; background: transparent; color: var(--black-04); font: 700 14px/1 var(--montserrat); transition: color .2s ease; }
.timeline__time:hover { color: var(--black-03); }
.timeline__time.is-active { color: var(--black-02); }
.timeline__time.is-active { font-weight: 700; }
.timeline__segment { position: relative; display: block; height: 4px; overflow: hidden; border-radius: 4px; background: #e6e6e6; }
.timeline__segment i { position: absolute; inset: 0 auto 0 0; display: block; width: 0; border-radius: inherit; background: var(--black-02); }
.timeline__scale.is-running .timeline__segment.is-active i { animation: timeline-progress 5s linear forwards; }
@keyframes timeline-progress { from { width: 0; } to { width: 100%; } }
.timeline__content { position: absolute; top: 312px; left: 50%; width: 1388px; height: 590px; transform: translateX(-50%); }
.timeline__visual { position: absolute; left: 94px; width: 590px; height: 590px; }
.timeline__content .timeline__visual { transition: opacity .56s ease .04s, transform .78s cubic-bezier(.22, .75, .25, 1) .04s; }
.timeline__story { position: absolute; top: 80px; left: 734px; width: 560px; }
.timeline__tag,
.timeline__story h2,
.timeline__story > p,
.timeline__quote { transition: opacity .52s ease, transform .7s cubic-bezier(.22, .75, .25, 1); }
.timeline__tag { transition-delay: .1s; }
.timeline__story h2 { transition-delay: .18s; }
.timeline__story > p { transition-delay: .26s; }
.timeline__quote { transition-delay: .34s; }
.timeline__content.is-switching .timeline__visual {
  opacity: 0;
  transform: translateY(12px) scale(.995);
  transition-duration: .28s;
  transition-delay: 0s;
}
.timeline__content.is-switching .timeline__tag,
.timeline__content.is-switching .timeline__story h2,
.timeline__content.is-switching .timeline__story > p,
.timeline__content.is-switching .timeline__quote {
  opacity: 0;
  transform: translateY(10px);
  transition-duration: .28s;
  transition-delay: 0s;
}
.timeline__tag { display: flex; width: max-content; height: 34px; align-items: center; gap: 8px; padding: 0 16px; border-radius: 17px; background: rgba(0,0,0,.05); font-size: 14px; font-weight: 600; }
.timeline__story h2 { margin-top: 32px; font: 700 48px/1.2 Arial, sans-serif; letter-spacing: -1.2px; text-transform: capitalize; }
.timeline__story > p { margin-top: 24px; color: var(--black-03); font-size: 14px; line-height: 1.5; }
.timeline__quote { display: flex; align-items: center; gap: 4px; margin-top: 48px; font-size: 14px; }
.timeline__quote img { margin-right: 4px; border-radius: 50%; }
.timeline__quote span { color: var(--black-04); }
.round-arrow { position: absolute; z-index: 3; top: 267px; width: 56px; height: 56px; padding: 0; border-radius: 50%; background: transparent; transition: transform .2s ease; }
.round-arrow:hover { transform: scale(1.08); }
.round-arrow img { width: 56px; height: 56px; }
.round-arrow--left { left: 0; }
.round-arrow--right { right: 0; }

.share { height: 992px; background: #fff; }
.share-grid { position: absolute; top: 254px; left: 50%; display: grid; width: var(--content); height: 638px; grid-template-columns: 1fr 1fr; gap: 20px; transform: translateX(-50%); }
.share-card { position: relative; overflow: hidden; border-radius: var(--radius); }
.share-card > img { width: 100%; height: 100%; object-fit: cover; }
.share-card--info > img { position: absolute; inset: 0; }
.share-card__copy { position: absolute; top: 48px; left: 76px; width: 438px; text-align: center; }
.share-card__copy h3 { font-size: 28px; font-weight: 600; line-height: 1; text-transform: capitalize; }
.share-card__copy p { margin-top: 16px; color: var(--black-03); font-size: 14px; line-height: 1.45; text-transform: capitalize; }
.share-tag {
  display: inline-flex;
  height: 46px;
  margin: 24px auto 0;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 20px;
  border-radius: 999px;
  color: #f97c00;
  background: rgba(249, 124, 0, .12);
  font: 700 14px/1 var(--montserrat);
  letter-spacing: .04em;
  text-transform: uppercase;
  white-space: nowrap;
}
.share-tag img {
  width: 18px;
  height: 18px;
  flex: 0 0 auto;
  object-fit: contain;
}

.works { height: 974px; background: #000; color: #fff; }
.works__background { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.works__content { position: absolute; top: 254px; left: 50%; width: var(--content); height: 720px; transform: translateX(-50%); }
.steps { position: absolute; top: 110px; left: 0; display: grid; width: 664px; grid-template-columns: repeat(2, 300px); gap: 100px 60px; }
.step img { width: 56px; height: 56px; }
.step h3 { margin-top: 25px; font-size: 20px; font-weight: 600; line-height: 1.35; text-transform: capitalize; }
.step p { margin-top: 8px; color: var(--white-03); font-size: 14px; line-height: 1.45; text-transform: capitalize; }
.works__phone { position: absolute; right: 0; bottom: 0; width: 428px; height: 720px; max-width: none; object-fit: contain; object-position: bottom right; }

.faq { height: 914px; background: #fff; }
.faq .section-heading p a { color: var(--black-02); text-decoration: underline; text-underline-offset: 2px; }
.faq-list { position: absolute; top: 262px; left: 50%; width: var(--content); transform: translateX(-50%); }
.faq-item { border-bottom: 1px solid rgba(0,0,0,.1); }
.faq-item:last-child { border-bottom: 0; }
.faq-item:not(.is-open) { min-height: 88px; }
.faq-item button {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 32px 0 16px;
  background: transparent;
  color: var(--black-02);
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  line-height: 24px;
}
.faq-item button span { flex: 1; min-width: 0; }
.faq-item button img { flex: 0 0 24px; width: 24px; height: 24px; }
.faq-answer {
  display: grid;
  grid-template-rows: 0fr;
  align-content: start;
  transition: grid-template-rows .35s ease;
}
.faq-item.is-open .faq-answer { grid-template-rows: 1fr; }
.faq-answer__body {
  min-height: 0;
  overflow: hidden;
}
.faq-answer p {
  margin: 0;
  padding: 0 48px 36px 0;
  color: var(--black-03);
  font-size: 14px;
  line-height: 1.45;
}
.faq-answer a { color: var(--black-02); text-decoration: underline; text-underline-offset: 2px; }

.footer { height: 390px; background: var(--black-02); color: #fff; }
.footer__top {
  position: absolute;
  top: 60px;
  left: 50%;
  display: flex;
  width: var(--content);
  align-items: flex-start;
  justify-content: space-between;
  gap: 48px;
  transform: translateX(-50%);
}
.footer h2 { margin-bottom: 16px; font-size: 18px; font-weight: 500; line-height: 1; }
.footer__download { display: none; }
.footer__links {
  display: grid;
  grid-template-columns: max-content max-content max-content max-content;
  gap: 100px;
  justify-content: end;
  justify-items: start;
}
.footer__links > div { min-width: 0; }
.footer__links a { display: block; margin-bottom: 16px; color: var(--white-03); font-size: 14px; line-height: 1; transition: color .2s ease; }
.footer__links a:hover { color: #fff; }
.footer__bottom { position: absolute; right: 0; bottom: 0; left: 0; height: 101px; border-top: 1px solid rgba(255,255,255,.1); }
.footer__legal {
  position: absolute;
  top: 43px;
  left: 50%;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--white-03);
  font-size: 14px;
  line-height: 14px;
  transform: translateX(-50%);
  white-space: nowrap;
}
.footer__legal-divider {
  flex: 0 0 1px;
  width: 1px;
  height: 12px;
  background: rgba(255, 255, 255, .1);
}
.footer__bottom a { color: inherit; transition: color .2s ease; }
.footer__bottom a:hover { color: #fff; }
.language {
  position: relative;
  display: flex;
  height: 42px;
  flex: 0 0 auto;
  align-items: center;
  gap: 8px;
  padding: 0 24px;
  border: 1px solid rgba(255,255,255,.1);
  border-radius: 40px;
  color: #fff;
  background: transparent;
  font-size: 14px;
  cursor: pointer;
  transition: border-color .2s ease, background-color .2s ease;
}
.language:hover { border-color: rgba(255,255,255,.3); background: rgba(255,255,255,.06); }
html.is-lang-switching,
html.is-lang-switching body {
  overflow: hidden;
}
html.is-lang-switching body {
  opacity: 0;
  transition: opacity .32s cubic-bezier(.22, .61, .36, 1);
}
html.is-lang-revealing body {
  opacity: 1;
  transition: opacity .55s cubic-bezier(.22, .61, .36, 1);
}
@media (prefers-reduced-motion: reduce) {
  html.is-lang-switching body,
  html.is-lang-revealing body {
    transition: none;
  }
}

html[data-lang="zh"] body { font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", var(--ui); }
html[data-lang="zh"] .footer__links {
  grid-template-columns: repeat(4, max-content);
  justify-content: end;
  column-gap: 100px;
  row-gap: 0;
}
html[data-lang="zh"] .hero h1,
html[data-lang="zh"] .section-heading h2,
html[data-lang="zh"] .timeline__story h2 {
  text-transform: none;
}
/* lang 在 HTML 即存在；data-lang 需等 i18n 写入。两者都匹配，避免未生效 */
html[lang^="zh"] .hero h1,
html[data-lang="zh"] .hero h1 {
  font-size: 68px;
  line-height: 1.2;
}
html[data-lang="zh"] .share-tag {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", var(--ui);
  font-weight: 600;
  letter-spacing: 0;
  text-transform: none;
}
html[data-lang="zh"] .nav-download__popover p {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", var(--ui);
  text-transform: none;
  letter-spacing: 0;
}
html[data-lang="zh"] .share-card__copy h3,
html[data-lang="zh"] .share-card__copy p,
html[data-lang="zh"] .step h3,
html[data-lang="zh"] .step p {
  text-transform: none;
}
html[data-lang="zh"] .hero__copy,
html[data-lang="zh"] .section-heading p,
html[data-lang="zh"] .feature-card__copy p,
html[data-lang="zh"] .timeline__story > p,
html[data-lang="zh"] .timeline__quote,
html[data-lang="zh"] .share-card__copy p,
html[data-lang="zh"] .step p,
html[data-lang="zh"] .faq-item button span,
html[data-lang="zh"] .faq-answer p {
  text-wrap: pretty;
  line-break: strict;
}
html[data-lang="zh"] .section-heading p {
  max-width: 42em;
  margin-inline: auto;
  line-height: 1.55;
  text-align: center;
}
html[data-lang="zh"] .feature-card__copy p {
  line-height: 1.55;
}

.hero-motion { opacity: 0; animation: hero-enter .75s cubic-bezier(.2,.75,.25,1) forwards; }
.hero h1.hero-motion { animation-delay: .08s; }
.hero__copy.hero-motion { animation-delay: .16s; }
.hero__button.hero-motion { animation-delay: .24s; }
@keyframes hero-enter { from { opacity: 0; transform: translateY(18px); } to { opacity: 1; transform: translateY(0); } }
.reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s ease, transform .7s cubic-bezier(.2,.75,.25,1); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }

@media (min-width: 1441px) {
  .section-heading.reveal,
  .endorsement.reveal,
  .timeline__scale.reveal,
  .faq-list.reveal { transform: translate(-50%, 24px); }
  .section-heading.reveal.is-visible,
  .endorsement.reveal.is-visible,
  .timeline__scale.reveal.is-visible,
  .faq-list.reveal.is-visible { transform: translate(-50%, 0); }
}

@media (max-width: 1440px) and (min-width: 1024px) {
  .site-header { padding-inline: var(--page-inline); }
  .site-header.is-scrolled { padding: 16px var(--page-inline); }
  .hero { height: min(900px, 100svh); min-height: 760px; }
  .hero__content { left: var(--page-inline); top: 50%; width: min(860px, calc(100% - var(--page-inline) * 2)); transform: translateY(-50%); }
  .hero h1 { font-size: clamp(58px, 5.25vw, 72px); }
  html[lang^="zh"] .hero h1,
  html[data-lang="zh"] .hero h1 { font-size: clamp(54px, 5vw, 68px); }
  .fixed-section:not(.footer):not(.works):not(.share) { height: auto; min-height: 0; padding: 80px 48px; }
  .fixed-section.share { height: 992px; padding: 0; overflow: hidden; }
  .share .section-heading {
    position: absolute;
    top: 100px;
    left: 50%;
    width: min(100%, var(--content));
    margin: 0;
    transform: translateX(-50%);
  }
  .share-grid {
    position: absolute;
    top: 254px;
    left: 50%;
    width: min(100%, var(--content));
    height: 638px;
    margin: 0;
    transform: translateX(-50%);
  }
  .section-heading, .products .section-heading, .features .section-heading { position: relative; top: auto; left: auto; width: min(100%, var(--content)); margin-inline: auto; transform: none; }
  .endorsement { position: relative; top: auto; left: auto; width: min(100%, var(--content)); margin: 0 auto 80px; transform: none; }
  .product-grid, .feature-grid, .faq-list { position: relative; top: auto; left: auto; width: min(100%, var(--content)); margin: 80px auto 0; transform: none; }
  .product-card { height: auto; aspect-ratio: 590/410; }
  .feature-grid { grid-template-columns: minmax(0, 488fr) minmax(0, 184fr) minmax(0, 488fr); grid-template-rows: repeat(3, minmax(360px, 436px)); }
  .feature-card { height: auto; min-height: 360px; aspect-ratio: auto; }
  .feature-card:nth-child(1) { grid-column: 1 / 3; }
  .feature-card:nth-child(2) { grid-column: 3; }
  .feature-card:nth-child(3) { grid-column: 1; }
  .feature-card:nth-child(4) { grid-column: 2 / 4; }
  .feature-card:nth-child(5) { grid-column: 1 / 3; }
  .feature-card:nth-child(6) { grid-column: 3; }
  .readiness-visual,
  .sleep-visual,
  .activity-visual,
  .period-visual {
    top: auto;
    right: auto;
    bottom: -5px;
    object-position: bottom center;
  }
  .readiness-visual { left: 15.6%; width: 70%; height: 87.2%; bottom: -5px; }
  .sleep-visual { left: 13.7%; width: 77.9%; height: 71.6%; }
  .activity-visual { left: 17.4%; width: 58.6%; height: 63.3%; }
  .period-visual { left: 8.8%; width: 74.2%; height: 68.8%; bottom: -5px; }
  .hr-visual { top: 0; left: 29.6%; width: 61.6%; height: 90.8%; }
  .spo2-visual { top: 0; left: 23.8%; width: 61.6%; height: 90.8%; }
  .timeline { padding-inline: 48px; }
  .timeline__scale { position: relative; top: auto; left: auto; width: min(100%, var(--content)); margin: 44px auto 0; transform: none; }
  .timeline__content { position: relative; top: auto; left: auto; width: min(100%, var(--content)); height: auto; margin: 48px auto 0; transform: none; display: grid; grid-template-columns: 56px minmax(0, 1fr) minmax(0, 1fr) 56px; gap: 32px; align-items: center; }
  .timeline__visual, .timeline__story, .round-arrow { position: relative; top: auto; right: auto; left: auto; width: 100%; height: auto; }
  .round-arrow { width: 56px; }
  .share-card { height: 100%; }
  .fixed-section.works {
    height: 974px;
    padding: 0;
    overflow: hidden;
  }
  .works .section-heading {
    position: absolute;
    top: 100px;
    left: 50%;
    width: min(100%, var(--content));
    margin: 0;
    transform: translateX(-50%);
  }
  .works__content {
    position: absolute;
    top: 254px;
    left: 50%;
    width: min(100%, var(--content));
    height: 720px;
    margin: 0;
    transform: translateX(-50%);
  }
  .steps {
    position: absolute;
    top: 110px;
    left: 0;
    width: 664px;
    grid-template-columns: repeat(2, 300px);
    gap: 100px 60px;
  }
  .works__phone {
    position: absolute;
    right: 0;
    bottom: 0;
    top: auto;
    width: 428px;
    height: 720px;
    max-width: none;
    object-fit: contain;
    object-position: bottom right;
  }
  .faq-list { margin-top: 72px; }
  .footer__top { width: min(var(--content), calc(100% - 96px)); }
  .footer__links { gap: clamp(36px, 6vw, 100px); }
}

.sku-modal {
  position: fixed;
  inset: 0;
  z-index: 100;
  overflow-x: auto;
  background: rgba(0, 0, 0, .8);
}
.sku-modal[hidden] { display: none; }
.sku-modal__frame {
  display: block;
  width: 100%;
  height: 100%;
  border: 0;
  background: transparent;
  color-scheme: normal;
}
html.sku-modal-open,
html.sku-modal-open body,
html.legal-modal-open,
html.legal-modal-open body,
html.about-modal-open,
html.about-modal-open body {
  overflow: hidden;
}

.about-modal {
  position: fixed;
  inset: 0;
  z-index: 110;
  display: grid;
  padding: 60px 50px;
  overflow-x: auto;
  overflow-y: auto;
  background: rgba(0, 0, 0, .6);
  -webkit-overflow-scrolling: touch;
  box-sizing: border-box;
}
.about-modal[hidden] { display: none; }
.about-modal__dialog {
  position: relative;
  width: min(1500px, 100%);
  min-width: 924px;
  margin: auto;
  overflow: hidden;
  border-radius: 40px;
  background: #fff;
}
.about-modal__close {
  position: absolute;
  z-index: 20;
  top: 48px;
  right: 48px;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: transform .25s ease;
}
.about-modal__close:hover { transform: rotate(90deg); }
.about-modal__close img { display: block; width: 36px; height: 36px; }
.about-modal__hero {
  position: relative;
  height: 600px;
  overflow: hidden;
  border-radius: 40px 40px 0 0;
}
.about-modal__hero img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center center;
}
.about-modal__hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 163px;
  background: linear-gradient(180deg, rgba(255, 255, 255, 0), #fff);
  content: "";
  pointer-events: none;
}
.about-modal__content {
  padding: 0 150px 72px;
}
.about-modal__content > h2 {
  margin: 48px 0 0;
  color: rgba(0, 0, 0, .9);
  font: 600 24px/1.6 var(--ui);
}
.about-modal__content > h2:first-of-type { margin-top: 0; }
.about-modal__copy {
  margin-top: 12px;
  color: rgba(0, 0, 0, .9);
  font-size: 14px;
  line-height: 1.6;
}
.about-modal__copy p { margin: 0 0 1.6em; }
.about-modal__copy p:last-child { margin-bottom: 0; }
.about-modal__copy ul {
  margin: 0;
  padding-left: 21px;
  list-style: disc;
}
.about-modal__copy li { margin: 0 0 .55em; }
.about-modal__copy li:last-child { margin-bottom: 0; }
.about-modal__copy strong { font-weight: 600; }
.about-modal__meta {
  display: grid;
  grid-template-columns: minmax(0, 574px) minmax(0, 1fr);
  gap: 48px 138px;
  margin-top: 48px; /* 与章节标题间距一致，避免英文版段间距忽大忽小 */
}
.about-modal__meta h2 {
  margin: 0;
  color: rgba(0, 0, 0, .9);
  font: 600 24px/1.6 var(--ui);
}
.about-modal__meta > div > p {
  margin: 12px 0 0;
  color: #000;
  font-size: 14px;
  line-height: 1.5;
}
.about-modal__contacts {
  display: flex;
  flex-wrap: wrap;
  gap: 24px 48px;
  margin-top: 12px;
}
.about-modal__contact {
  display: flex;
  align-items: center; /* 图标相对两行文案垂直居中 */
  gap: 12px;
}
.about-modal__contact img {
  flex: 0 0 auto;
  width: 32px;
  height: 32px;
  object-fit: contain;
}
.about-modal__contact--phone img {
  width: 24px;
  height: 32px;
}
.about-modal__contact-line {
  display: flex;
  flex-direction: column;
  margin: 0;
  color: #000;
  font-size: 14px;
  line-height: 1.5;
}
.about-modal__contact-line span { font-weight: 400; }
.about-modal__contact-line a {
  color: #000;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.about-modal__contact-line strong { font-weight: 600; }

/* 中文稿：无独立 About Us 大标题；联系方式为「邮箱：」「电话：」行内排版 */
html[data-lang="zh"] .about-modal__content > h2,
html[data-lang="zh"] .about-modal__meta h2 {
  text-transform: none;
}
html[data-lang="zh"] .about-modal__meta {
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 40px 80px;
  margin-top: 56px;
}
html[data-lang="zh"] .about-modal__contacts {
  gap: 20px 40px;
  margin-top: 16px;
}
html[data-lang="zh"] .about-modal__contact {
  align-items: center;
  gap: 8px;
}
html[data-lang="zh"] .about-modal__contact img {
  width: 20px;
  height: 20px;
  margin-top: 0;
}
html[data-lang="zh"] .about-modal__contact--phone img {
  width: 15px;
  height: 20px;
}
html[data-lang="zh"] .about-modal__contact-line {
  flex-direction: row;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 0;
  line-height: 1;
}
html[data-lang="zh"] .about-modal__contact-line a,
html[data-lang="zh"] .about-modal__contact-line strong {
  font-weight: 600;
}

/* Overlay scrolls; dialog centers in the viewport (margin: auto in grid) */
.legal-modal {
  position: fixed;
  inset: 0;
  z-index: 110;
  display: grid;
  padding: 60px 50px;
  overflow-x: auto;
  overflow-y: auto;
  background: rgba(0, 0, 0, .6);
  -webkit-overflow-scrolling: touch;
  box-sizing: border-box;
}
.legal-modal[hidden] { display: none; }
.legal-modal__dialog {
  position: relative;
  width: min(1500px, 100%);
  min-width: 924px;
  margin: auto;
  border: 0;
  border-radius: 40px;
  background: #fff;
}
.legal-modal__close {
  position: sticky;
  z-index: 20;
  top: 48px;
  float: right;
  display: grid;
  place-items: center;
  width: 36px;
  height: 36px;
  margin: 48px 48px -84px 0;
  padding: 0;
  border: 0;
  border-radius: 50%;
  background: transparent;
  cursor: pointer;
  transition: transform .25s ease;
}
.legal-modal__close:hover { transform: rotate(90deg); }
.legal-modal__close img { display: block; width: 36px; height: 36px; }
.legal-modal__content {
  padding: 100px 150px 80px;
}
.legal-modal__title {
  margin: 0;
  color: rgba(0, 0, 0, .9);
  font: 700 52px/1 var(--montserrat);
  text-transform: capitalize;
}
.legal-modal__updated {
  margin: 24px 0 0;
  color: rgba(0, 0, 0, .6);
  font-size: 20px;
  line-height: 1.55;
}
.legal-modal__updated:empty { display: none; }
.legal-modal--plain-lead .legal-modal__updated {
  color: rgba(0, 0, 0, .9);
  font-size: 14px;
  line-height: 1.6;
}
.legal-modal--plain-lead .legal-modal__body {
  margin-top: 24px;
}
.legal-modal__body {
  margin-top: 40px;
  color: rgba(0, 0, 0, .9);
  font-size: 14px;
  line-height: 1.6;
}
.legal-modal__body > *:first-child { margin-top: 0; }
.legal-modal__body p { margin: 0 0 1em; }
.legal-modal__body a {
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 2px;
}
.legal-modal__body ol,
.legal-modal__body ul {
  margin: 0 0 1.2em;
  padding-left: 21px;
}
.legal-modal__body li { margin: 0 0 .15em; }
.legal-modal__toc li span {
  text-decoration: underline;
  text-underline-offset: 2px;
}
.legal-modal__body h2 {
  margin: 48px 0 16px;
  color: rgba(0, 0, 0, .9);
  font: 600 24px/1.6 var(--ui);
}
.legal-modal__body h3 {
  margin: 28px 0 12px;
  color: rgba(0, 0, 0, .9);
  font: 600 20px/1.5 var(--ui);
}
.legal-modal__body strong { font-weight: 600; }
.sizing-guide__intro {
  color: rgba(0, 0, 0, .65);
  font-size: 16px;
  line-height: 1.75;
}
html[data-lang="zh"] .legal-modal__updated,
html[data-lang="zh"] .legal-modal__body {
  text-wrap: pretty;
  line-break: strict;
}
.sizing-guide__steps,
.sizing-guide__checks {
  display: grid;
  gap: 12px;
}
.sizing-guide__steps li,
.sizing-guide__checks li {
  padding-left: 4px;
}
.sizing-guide__table-wrap {
  --size-table-line: #e6e6e6;
  margin-top: 28px;
  overflow-x: auto;
  border: 1px solid var(--size-table-line);
  border-radius: 16px;
  background: #fff;
  -webkit-overflow-scrolling: touch;
}
.sizing-guide__table {
  width: 100%;
  min-width: 960px;
  border-collapse: collapse;
  border-spacing: 0;
  font-size: 16px;
  background: #fff;
}
.sizing-guide__table th,
.sizing-guide__table td {
  border: 0;
  border-right: 1px solid var(--size-table-line);
  border-bottom: 1px solid var(--size-table-line);
  background-color: #fff;
  white-space: nowrap;
}
.sizing-guide__table th {
  width: 220px;
  padding: 18px 20px 18px 24px;
  text-align: left;
  font-weight: 600;
}
.sizing-guide__table td {
  min-width: 72px;
  padding: 18px 12px;
  text-align: center;
}
.sizing-guide__table tr td:last-child {
  border-right: 0;
}
.sizing-guide__table tr:last-child th,
.sizing-guide__table tr:last-child td {
  border-bottom: 0;
}
.sizing-guide__table td:nth-child(even) {
  background-color: #f6f6f6;
}
.sizing-guide__note {
  margin-top: 36px;
  padding: 24px 28px;
  border-radius: 16px;
  background: #f5f5f5;
  color: rgba(0, 0, 0, .7);
  font-style: normal;
}
html[data-lang="zh"] .legal-modal__title,
html[data-lang="zh"] .legal-modal__updated,
html[data-lang="zh"] .legal-modal__body h2,
html[data-lang="zh"] .legal-modal__body h3 {
  text-transform: none;
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", var(--ui);
}

@media (max-width: 1100px) and (min-width: 1024px) {
  .legal-modal__dialog { border-radius: 28px; }
  .legal-modal__close { top: 20px; margin: 20px 20px -56px 0; }
  .legal-modal__content { padding: 72px 40px 48px; }
  .legal-modal__title { font-size: clamp(28px, 5vw, 40px); }
  .legal-modal__updated { font-size: 16px; }
  .legal-modal--plain-lead .legal-modal__updated { font-size: 14px; }
  .legal-modal__body h2 { margin-top: 36px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
  .hero-motion, .reveal { opacity: 1; transform: none; }
}