:root {
  color-scheme: light;
  --bg: #f6f8f7;
  --surface: #ffffff;
  --surface-soft: #eef4f2;
  --ink: #10201f;
  --muted: #667774;
  --line: #dce7e4;
  --deep: #0a2624;
  --teal: #0f766e;
  --teal-dark: #0b5d56;
  --orange: #ff6b00;
  --shadow: 0 24px 70px rgba(16, 32, 31, 0.13);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans", "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.65;
}

a {
  color: var(--teal);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

img {
  display: block;
  max-width: 100%;
}

.en {
  display: none !important;
}

[data-lang="en"] .zh {
  display: none !important;
}

[data-lang="en"] .en {
  display: inline !important;
}

.site-header {
  position: sticky;
  top: 0;
  right: 0;
  left: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  background: rgba(8, 28, 27, 0.72);
  backdrop-filter: blur(16px);
}

.nav {
  width: min(1180px, calc(100% - 44px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: #fff;
  font-weight: 800;
}

.brand:hover {
  text-decoration: none;
}

.brand-mark {
  width: 40px;
  height: 40px;
  border: 1px solid rgba(255, 255, 255, 0.55);
  border-radius: 8px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.13);
  font-size: 18px;
}

.brand small {
  display: block;
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 14px;
  font-weight: 700;
}

.nav-links a {
  color: rgba(255, 255, 255, 0.88);
}

.language-switch {
  display: inline-flex;
  align-items: center;
  gap: 2px;
  padding: 3px;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.12);
}

.language-switch button {
  min-width: 54px;
  min-height: 32px;
  border: 0;
  border-radius: 999px;
  background: transparent;
  color: rgba(255, 255, 255, 0.8);
  cursor: pointer;
  font: inherit;
  font-size: 13px;
  font-weight: 800;
}

.language-switch button[aria-pressed="true"] {
  background: #fff;
  color: var(--deep);
}

.hero {
  min-height: 640px;
  display: flex;
  align-items: flex-end;
  position: relative;
  overflow: hidden;
  background: url("hero-health-devices.png") center / cover no-repeat;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(4, 22, 21, 0.34);
}

.hero::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 46%;
  background: rgba(4, 22, 21, 0.5);
}

.hero-inner {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
  padding: 180px 0 78px;
  position: relative;
  z-index: 1;
  color: #fff;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero .eyebrow {
  color: rgba(255, 255, 255, 0.78);
}

h1,
h2,
h3 {
  line-height: 1.14;
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(42px, 7vw, 88px);
  font-weight: 860;
}

h2 {
  margin: 0 0 16px;
  font-size: clamp(30px, 4vw, 52px);
  font-weight: 820;
}

h3 {
  margin: 0 0 10px;
  font-size: 21px;
}

.lead {
  max-width: 620px;
  margin: 22px 0 0;
  color: rgba(255, 255, 255, 0.82);
  font-size: 20px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 1px solid transparent;
  border-radius: 8px;
  padding: 12px 18px;
  background: var(--teal);
  color: #fff;
  font-weight: 850;
  box-shadow: 0 14px 34px rgba(15, 118, 110, 0.28);
}

.button:hover {
  background: var(--teal-dark);
  text-decoration: none;
}

.button.secondary {
  border-color: rgba(255, 255, 255, 0.55);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: none;
}

.button.secondary:hover {
  background: rgba(255, 255, 255, 0.2);
}

.trust-strip {
  width: min(1180px, calc(100% - 44px));
  margin: -46px auto 0;
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.stat {
  min-height: 116px;
  padding: 24px;
  border-right: 1px solid var(--line);
}

.stat:last-child {
  border-right: 0;
}

.stat strong {
  display: block;
  color: var(--ink);
  font-size: 24px;
  line-height: 1.1;
}

.stat span {
  display: block;
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
}

.section {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
  padding: 84px 0;
}

.section-header {
  max-width: 820px;
  margin-bottom: 30px;
}

.section-header p,
.card p,
.product-copy p,
.policy-page p,
.policy-page li {
  color: var(--muted);
}

.product-band {
  width: 100%;
  margin-top: 42px;
  background: #fff;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.product-layout {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
  display: grid;
  grid-template-columns: minmax(280px, 430px) minmax(0, 1fr);
  gap: clamp(34px, 7vw, 92px);
  align-items: center;
}

.phone-stage {
  width: min(360px, 100%);
  margin: 0 auto;
  padding: 12px;
  border-radius: 8px;
  background: #111;
  box-shadow: var(--shadow);
}

.phone-stage img {
  width: 100%;
  max-height: 680px;
  object-fit: cover;
  object-position: top;
  border-radius: 6px;
}

.product-copy {
  max-width: 680px;
}

.feature-list {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.feature-list div {
  display: grid;
  grid-template-columns: 150px minmax(0, 1fr);
  gap: 16px;
  padding: 17px 0;
  border-top: 1px solid var(--line);
}

.feature-list strong {
  color: var(--ink);
}

.feature-list span {
  color: var(--muted);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.card {
  min-height: 230px;
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.card .icon {
  width: 42px;
  height: 42px;
  margin-bottom: 24px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
}

.company-section {
  padding-top: 18px;
}

.company-panel {
  border-top: 1px solid var(--line);
}

.company-panel dl {
  margin: 0;
}

.company-panel div {
  display: grid;
  grid-template-columns: 280px minmax(0, 1fr);
  gap: 24px;
  padding: 22px 0;
  border-bottom: 1px solid var(--line);
}

.company-panel dt {
  color: var(--muted);
  font-weight: 800;
}

.company-panel dd {
  margin: 0;
  color: var(--ink);
  font-weight: 700;
  overflow-wrap: anywhere;
}

.compliance-section {
  padding-top: 18px;
}

.policy-links {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.policy-card {
  min-height: 130px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  color: var(--ink);
}

.policy-card:hover {
  border-color: rgba(15, 118, 110, 0.45);
  text-decoration: none;
}

.policy-card strong {
  display: block;
  margin-bottom: 8px;
}

.policy-card span {
  color: var(--muted);
  font-size: 14px;
}

.site-footer {
  margin-top: 34px;
  background: var(--deep);
  color: rgba(255, 255, 255, 0.84);
}

.footer-inner {
  width: min(1180px, calc(100% - 44px));
  margin: 0 auto;
  padding: 40px 0;
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: 28px;
}

.site-footer p {
  margin: 6px 0;
  color: rgba(255, 255, 255, 0.68);
}

.site-footer a {
  color: #b8fff6;
}

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

.page-hero {
  width: min(900px, calc(100% - 40px));
  margin: 44px auto 22px;
}

.page-hero h1 {
  color: var(--ink);
  font-size: clamp(34px, 5vw, 58px);
}

.policy-page {
  width: min(900px, calc(100% - 40px));
  margin: 0 auto;
  padding: 34px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.policy-page h2 {
  margin-top: 34px;
}

.policy-page h2:first-child {
  margin-top: 0;
}

.policy-page ul {
  padding-left: 22px;
}

.lang-note {
  color: var(--muted);
  font-size: 14px;
}

@media (max-width: 980px) {
  .nav {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 0;
  }

  .nav-right {
    width: 100%;
    justify-content: space-between;
  }

  .hero {
    min-height: 600px;
  }

  .trust-strip,
  .grid-3,
  .policy-links {
    grid-template-columns: repeat(2, 1fr);
  }

  .stat:nth-child(2n) {
    border-right: 0;
  }

  .stat:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

  .product-layout,
  .footer-inner {
    grid-template-columns: 1fr;
  }

  .footer-contact {
    text-align: left;
  }
}

@media (max-width: 640px) {
  .site-header {
    position: static;
  }

  .nav,
  .hero-inner,
  .trust-strip,
  .section,
  .product-layout,
  .footer-inner,
  .page-hero,
  .policy-page {
    width: min(100% - 28px, 1180px);
  }

  .nav-links {
    flex-wrap: wrap;
    gap: 12px 16px;
  }

  .nav-right {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .hero {
    min-height: 560px;
    align-items: flex-end;
  }

  .hero-inner {
    padding: 84px 0 44px;
  }

  h1 {
    font-size: 42px;
  }

  .lead {
    font-size: 18px;
  }

  .trust-strip,
  .grid-3,
  .policy-links {
    grid-template-columns: 1fr;
  }

  .stat {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .stat:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 60px 0;
  }

  .feature-list div,
  .company-panel div {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .policy-page {
    padding: 22px;
  }
}