:root {
  --ink: #151515;
  --deep: #1f3030;
  --muted: #5a6666;
  --line: rgba(21, 21, 21, 0.14);
  --paper: #ffffff;
  --soft: #f4f6f7;
  --mist: #eef2f4;
  --mint: #64d7bd;
  --aqua: #8fe6ed;
  --coral: #ff9a82;
  --yellow: #d7e24a;
  --accent: #00c9ea;
  --scroll-progress: 0;
  --radius-lg: 28px;
  --radius-md: 20px;
  --header-height: 100px;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Lexend", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--deep);
  background: var(--paper);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background: var(--paper);
  color: var(--deep);
  font-size: 17px;
  line-height: 1.55;
  overflow-x: hidden;
}

body.is-enhanced {
  --hero-shift: 0px;
  --scan-shift: 0px;
}

body.menu-open {
  overflow: hidden;
}

body.menu-open .site-header {
  background: #fff;
  opacity: 1;
}

a {
  color: inherit;
  text-decoration: none;
}

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

button {
  font: inherit;
}

.container {
  width: min(100% - 80px, 1180px);
  margin-inline: auto;
}

/* 固定导航会占据顶部空间，锚点跳转时需要预留可读距离。 */
section,
footer {
  scroll-margin-top: calc(var(--header-height) + 24px);
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* 固定头部：参考站是强存在感的白色悬浮导航，这里保持同样节奏。 */
.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 30;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.76);
  border-bottom: 1px solid rgba(21, 21, 21, 0.08);
  backdrop-filter: blur(18px);
  transition: background-color 280ms ease, box-shadow 280ms ease, backdrop-filter 280ms ease, opacity 220ms ease;
  will-change: background-color, box-shadow, backdrop-filter, opacity;
}

.site-header::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -1px;
  height: 2px;
  transform: scaleX(var(--scroll-progress));
  transform-origin: left center;
  background: var(--accent);
  opacity: 0;
  transition: opacity 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(255, 255, 255, 0.78);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
  backdrop-filter: blur(12px) saturate(1.4);
  opacity: 0.94;
}

.site-header.is-scrolled::after {
  opacity: 1;
}

.header-shell {
  width: min(100% - 84px, 1960px);
  height: 100%;
  margin-inline: auto;
  display: grid;
  grid-template-columns: clamp(280px, 30vw, 610px) minmax(0, 1fr) auto auto;
  align-items: center;
  column-gap: clamp(18px, 1.5vw, 30px);
}

.brand {
  display: inline-flex;
  align-items: center;
  width: clamp(156px, 11vw, 220px);
  min-width: 148px;
  height: 82px;
}

.brand-logo {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: left center;
}

.nav-area {
  align-self: stretch;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  position: relative;
}

.utility-nav,
.main-nav {
  display: flex;
  align-items: center;
  justify-content: flex-end;
}

.utility-nav {
  gap: clamp(28px, 2.5vw, 46px);
  min-height: 38px;
  padding-right: 0;
  font-size: 12px;
  text-transform: uppercase;
  color: var(--ink);
}

.main-nav {
  gap: clamp(22px, 2.1vw, 42px);
  min-height: 42px;
  border-top: 1px solid var(--line);
  font-size: 15px;
  white-space: nowrap;
}

.utility-nav a,
.main-nav a {
  transition: color 180ms ease, opacity 180ms ease;
}

.utility-nav a:hover,
.main-nav a:hover {
  color: #000;
  opacity: 0.62;
}

.main-nav a {
  position: relative;
  border-radius: 999px;
  padding: 4px 0;
}

.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -7px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left center;
  background: #000;
  transition: transform 240ms ease;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.nav-preview {
  position: absolute;
  top: calc(100% - 10px);
  left: var(--nav-preview-left, 0);
  z-index: 5;
  width: min(330px, 42vw);
  padding: 18px 22px;
  border-radius: 0 0 16px 16px;
  background: #eff0f4;
  color: var(--deep);
  box-shadow: 0 20px 44px rgba(0, 0, 0, 0.12);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  pointer-events: none;
  transition: opacity 300ms ease, transform 300ms ease, visibility 300ms ease;
}

.nav-preview.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-preview strong,
.nav-preview span {
  display: block;
}

.nav-preview strong {
  color: #000;
  font-size: 15px;
  font-weight: 700;
}

.nav-preview span {
  margin-top: 10px;
  color: #4c5d5d;
  font-size: 13px;
  line-height: 1.5;
}

.theme-toggle {
  /* 明暗切换改成轻量线性图标，避免头部出现突兀的实心大圆。 */
  position: relative;
  overflow: hidden;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border: 1px solid rgba(5, 8, 10, 0.14);
  border-radius: 12px;
  background: rgba(5, 8, 10, 0.04);
  color: #05080a;
  box-shadow: none;
  cursor: pointer;
  transition: transform 180ms ease, background 260ms ease, border-color 260ms ease, color 260ms ease, box-shadow 260ms ease;
}

.theme-toggle-icon {
  width: 20px;
  height: 20px;
  pointer-events: none;
}

.theme-toggle:hover {
  transform: translateY(-2px);
  border-color: rgba(0, 201, 234, 0.55);
  background: rgba(0, 201, 234, 0.1);
  color: #006a78;
  box-shadow: 0 10px 24px rgba(0, 0, 0, 0.1);
}

.contact-button,
.pill-link,
.outline-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  border-radius: 999px;
  padding: 10px 28px;
  font-weight: 600;
  letter-spacing: 0;
  position: relative;
  overflow: hidden;
  transition: transform 180ms ease, background 400ms ease-in-out, color 400ms ease-in-out, border-color 400ms ease-in-out;
  transform: translateZ(0);
}

.contact-button,
.pill-link.dark {
  background: #000;
  color: #fff;
}

.contact-button:hover,
.pill-link.dark:hover {
  background: var(--accent);
  color: #000;
}

.pill-link.light {
  background: #fff;
  color: #000;
}

.pill-link.light:hover {
  background: var(--accent);
  color: #000;
}

.outline-button {
  border: 1px solid rgba(255, 255, 255, 0.82);
  color: #fff;
  min-width: 226px;
}

.outline-button:hover {
  border-color: #fff;
  background: var(--accent);
  color: #000;
}

.contact-button:active,
.pill-link:active,
.outline-button:active,
.theme-toggle:active,
.menu-toggle:active,
.to-top:active {
  transform: scale(0.97);
}

.click-ripple {
  position: absolute;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  pointer-events: none;
  transform: translate(-50%, -50%) scale(0);
  background: rgba(255, 255, 255, 0.55);
  animation: ripple-out 520ms ease-out forwards;
}

.contact-button:hover .click-ripple,
.pill-link:hover .click-ripple,
.outline-button:hover .click-ripple {
  background: rgba(0, 0, 0, 0.16);
}

@keyframes ripple-out {
  to {
    opacity: 0;
    transform: translate(-50%, -50%) scale(18);
  }
}

.menu-toggle {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: #fff;
  color: #000;
  cursor: pointer;
}

.menu-toggle span:not(.sr-only) {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  background: currentColor;
  border-radius: 999px;
  transition: transform 220ms ease, opacity 180ms ease;
}

body.menu-open .menu-toggle span:nth-child(1) {
  transform: translateY(6px) rotate(45deg);
}

body.menu-open .menu-toggle span:nth-child(2) {
  opacity: 0;
}

body.menu-open .menu-toggle span:nth-child(3) {
  transform: translateY(-6px) rotate(-45deg);
}

/* 首屏视觉：用本地 SVG 与径向渐变模拟医学影像、热区和细胞轮廓。 */
.hero-section {
  position: relative;
  min-height: 760px;
  padding-top: calc(var(--header-height) + 105px);
  overflow: hidden;
  background:
    radial-gradient(circle at 13% 77%, rgba(215, 226, 74, 0.75), transparent 18%),
    radial-gradient(circle at 28% 79%, rgba(99, 215, 189, 0.75), transparent 23%),
    radial-gradient(circle at 84% 10%, rgba(255, 154, 130, 0.34), transparent 20%),
    linear-gradient(105deg, #f1ffff 0%, #fff 49%, #fff7f4 100%);
}

.hero-art {
  position: absolute;
  inset: auto auto -55px 0;
  width: min(950px, 76vw);
  opacity: 0.78;
  pointer-events: none;
  transform: translate3d(0, var(--hero-shift), 0);
  transition: transform 120ms linear;
}

.hero-content {
  position: relative;
  z-index: 1;
}

h1,
h2,
h3,
p {
  margin: 0;
}

h1,
h2 {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Outfit", "Lexend", system-ui, sans-serif;
  color: var(--ink);
  font-weight: 400;
  letter-spacing: 0;
}

h1 {
  max-width: 930px;
  font-size: clamp(44px, 5.2vw, 68px);
  line-height: 1.18;
}

.hero-kicker {
  margin-top: 34px;
  color: var(--deep);
  font-size: clamp(23px, 2.2vw, 28px);
  font-weight: 400;
  line-height: 1.25;
}

.hero-copy {
  max-width: 550px;
  margin-top: 18px;
  color: #344747;
  font-size: 16px;
}

.stats-section {
  padding: 108px 0 78px;
  background: #fff;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 56px;
  text-align: center;
}

.stats-grid article {
  display: grid;
  justify-items: center;
  gap: 8px;
}

.stats-grid strong {
  color: var(--deep);
  font-family: "Outfit", "Lexend", sans-serif;
  font-size: clamp(44px, 4.8vw, 62px);
  font-weight: 300;
  line-height: 1;
}

.stats-grid strong::after {
  content: "";
  display: block;
  width: 100%;
  height: 1px;
  margin-top: 12px;
  background: rgba(31, 48, 48, 0.28);
}

.stats-grid span {
  color: var(--ink);
  font-size: 16px;
  font-weight: 600;
}

.feature-band {
  padding-bottom: 105px;
  background: #fff;
}

.scan-hero {
  position: relative;
  min-height: 450px;
  overflow: hidden;
  border-radius: var(--radius-lg);
  background: #000;
  transform: translateZ(0);
}

.scan-hero img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.86;
  transform: translate3d(0, var(--scan-shift), 0) scale(1.04);
  transition: transform 120ms linear, opacity 300ms ease;
}

.scan-hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(0, 0, 0, 0.88) 0%, rgba(0, 0, 0, 0.56) 40%, rgba(0, 0, 0, 0.08) 100%);
}

.scan-copy {
  position: relative;
  z-index: 1;
  width: min(620px, 72%);
  padding: 76px 60px;
  color: #fff;
}

.scan-copy h2 {
  color: #fff;
  font-size: clamp(34px, 4vw, 48px);
  line-height: 1.18;
}

.scan-copy p {
  margin: 20px 0 32px;
  color: rgba(255, 255, 255, 0.82);
}

.solutions-section {
  padding: 20px 0 88px;
  background: #fff;
}

.solutions-section > .container > h2,
.partners-section h2,
.trusted-section h2,
.platform-section h2,
.investors-section h2,
.news-section h2 {
  font-size: clamp(36px, 4.1vw, 50px);
  line-height: 1.15;
}

.solution-row {
  display: grid;
  grid-template-columns: minmax(280px, 0.9fr) minmax(440px, 1.35fr);
  gap: clamp(54px, 8vw, 116px);
  align-items: start;
  padding: 74px 0 84px;
  border-bottom: 1px solid rgba(31, 48, 48, 0.12);
}

.solution-row:hover .solution-icon {
  transform: translateY(-4px) rotate(-2deg);
}

.solution-row:last-child {
  border-bottom: 0;
  padding-bottom: 40px;
}

.solution-intro h3 {
  margin-top: 18px;
  color: #050505;
  font-size: clamp(26px, 2.7vw, 34px);
  font-weight: 400;
  line-height: 1.15;
}

.solution-intro p {
  margin: 38px 0 28px;
  max-width: 520px;
  color: #405050;
}

.solution-icon {
  display: block;
  width: 106px;
  aspect-ratio: 1;
  position: relative;
  transition: transform 360ms ease;
}

.screening-icon::before {
  content: "";
  position: absolute;
  inset: 16px 12px 10px;
  border: 3px solid #080808;
  border-top: 0;
  border-radius: 12px 12px 22px 22px;
  background:
    linear-gradient(90deg, transparent 46%, #111 46% 50%, transparent 50%),
    linear-gradient(#80d9f0, #6dd0e6);
}

.screening-icon::after {
  content: "";
  position: absolute;
  inset: 8px 18px auto;
  height: 50px;
  border: 3px solid #111;
  border-bottom: 0;
  border-radius: 50% 50% 0 0;
  clip-path: polygon(0 0, 38% 0, 49% 100%, 60% 0, 100% 0, 100% 100%, 0 100%);
}

.oncology-icon {
  border: 3px solid #111;
  border-radius: 50%;
  background:
    radial-gradient(circle at 57% 30%, #111 0 10px, transparent 11px),
    radial-gradient(circle at 32% 41%, #111 0 4px, transparent 5px),
    radial-gradient(circle at 68% 62%, #111 0 4px, transparent 5px),
    radial-gradient(circle at 30% 70%, #111 0 3px, transparent 4px),
    #7bd9ef;
}

.oncology-icon::after {
  content: "";
  position: absolute;
  left: 34px;
  bottom: 24px;
  width: 38px;
  height: 26px;
  border: 3px solid #111;
  border-top: 0;
  border-right: 0;
  border-radius: 0 0 0 24px;
  transform: rotate(-16deg);
}

.solution-links {
  display: grid;
  grid-template-columns: repeat(2, minmax(200px, 1fr));
  column-gap: clamp(40px, 6vw, 88px);
  row-gap: 22px;
  padding-top: 70px;
}

.solution-links.single-column {
  grid-template-columns: 1fr;
  max-width: 560px;
}

.solution-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  color: var(--deep);
  font-weight: 600;
  border-bottom: 1px solid transparent;
  transition: border-color 160ms ease, color 160ms ease;
}

.solution-links a:hover {
  color: #000;
  border-color: rgba(0, 0, 0, 0.22);
}

.solution-links a:hover span,
.section-heading a:hover span {
  background: var(--accent);
  color: #000;
  transform: translateX(3px);
}

.solution-links span,
.section-heading span {
  width: 18px;
  height: 18px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  background: #000;
  color: #fff;
  font-size: 18px;
  line-height: 0.9;
  flex: 0 0 auto;
  transition: background 220ms ease, color 220ms ease, transform 220ms ease;
}

.partners-section {
  padding: 40px 0 120px;
  background: #fff;
}

.partner-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 28px;
  margin-top: 60px;
}

.partner-card {
  min-height: 380px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  align-items: flex-start;
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  padding: 44px 30px;
  color: #fff;
  background: #172222;
  transition: transform 360ms ease, box-shadow 360ms ease;
}

.partner-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 54px rgba(0, 0, 0, 0.18);
}

.partner-card::before,
.partner-card::after {
  content: "";
  position: absolute;
  inset: 0;
}

.partner-card::before {
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.15), rgba(0, 0, 0, 0.72));
  z-index: 1;
}

.partner-card::after {
  z-index: 0;
  opacity: 0.72;
  transition: transform 520ms ease, opacity 520ms ease;
}

.partner-card:hover::after {
  opacity: 0.9;
  transform: scale(1.04);
}

.imaging-card::after {
  background:
    radial-gradient(circle at 18% 22%, rgba(143, 230, 237, 0.38), transparent 16%),
    linear-gradient(140deg, rgba(18, 32, 32, 0.1), rgba(0, 0, 0, 0.9)),
    url("./assets/partner-clinic.svg") center / cover;
}

.pharma-card::after {
  background:
    radial-gradient(circle at 78% 15%, rgba(255, 154, 130, 0.34), transparent 16%),
    linear-gradient(140deg, rgba(35, 50, 50, 0.06), rgba(0, 0, 0, 0.9)),
    url("./assets/pharma-lab.svg") center / cover;
}

.partner-card > * {
  position: relative;
  z-index: 2;
}

.partner-card h3 {
  max-width: 500px;
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Outfit", "Lexend", sans-serif;
  font-size: clamp(30px, 3.1vw, 40px);
  font-weight: 300;
  line-height: 1.12;
}

.partner-card p {
  max-width: 510px;
  margin: 20px 0 30px;
  color: rgba(255, 255, 255, 0.86);
}

.trusted-section {
  padding: 110px 0 0;
  background: #000;
  color: #fff;
  overflow: hidden;
}

.trusted-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.85fr) minmax(360px, 1fr);
  gap: 76px;
  align-items: start;
}

.trusted-section h2 {
  color: #fff;
}

.logo-cloud {
  display: grid;
  gap: 16px;
  margin-top: 58px;
}

.logo-cloud span {
  width: fit-content;
  color: rgba(255, 255, 255, 0.84);
  font-size: 14px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
  padding: 9px 15px;
}

.testimonial {
  margin: 0;
  padding: 10px 0 120px;
}

.testimonial blockquote {
  margin: 0;
  color: rgba(255, 255, 255, 0.9);
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Outfit", "Lexend", sans-serif;
  font-size: clamp(25px, 2.7vw, 38px);
  font-weight: 300;
  line-height: 1.22;
}

.testimonial figcaption {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 36px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.testimonial strong {
  display: block;
  color: #fff;
  font-size: 15px;
  font-weight: 600;
}

.avatar {
  width: 58px;
  aspect-ratio: 1;
  border-radius: 16px;
  background:
    radial-gradient(circle at 48% 35%, #ffdfc5 0 16%, transparent 17%),
    linear-gradient(90deg, #e9eef0 0 45%, #334247 46% 100%);
}

.trusted-section::after {
  content: "";
  display: block;
  height: 170px;
  background:
    radial-gradient(circle at 84% 30%, rgba(143, 230, 237, 0.55), transparent 16%),
    url("./assets/hero-cells.svg") right bottom / 760px auto no-repeat,
    #000;
}

.platform-section {
  padding: 120px 0;
  background: var(--mist);
  text-align: center;
}

.platform-copy {
  max-width: 1020px;
}

.platform-copy p {
  max-width: 940px;
  margin: 26px auto 0;
  color: #405050;
}

.investors-section {
  padding: 120px 0 116px;
  background: #fff;
}

.investors-grid {
  display: grid;
  grid-template-columns: minmax(320px, 0.86fr) minmax(480px, 1fr);
  gap: 58px;
  align-items: center;
}

.investors-grid p {
  max-width: 560px;
  margin: 34px 0 42px;
  color: #405050;
}

.investors-grid img {
  width: 100%;
  border-radius: var(--radius-md);
}

.news-section {
  padding: 0 0 118px;
  background: #fff;
}

.section-heading {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 46px;
}

.section-heading a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--deep);
  font-weight: 600;
}

.news-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 28px;
}

.news-card {
  overflow: hidden;
  border-radius: var(--radius-md);
  background: var(--soft);
  min-height: 430px;
  display: flex;
  flex-direction: column;
  transition: transform 360ms ease, box-shadow 360ms ease;
}

.news-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 22px 46px rgba(23, 34, 34, 0.16);
}

.event-face {
  min-height: 205px;
  padding: 28px 30px;
  display: grid;
  align-content: start;
  gap: 18px;
  background:
    radial-gradient(circle at 100% 0%, rgba(255, 154, 130, 0.45), transparent 34%),
    linear-gradient(135deg, #fff 0%, #f5faf9 100%);
  color: #080808;
  transition: filter 360ms ease;
}

.news-card:hover .event-face {
  filter: saturate(1.12);
}

.event-face.pale {
  background:
    radial-gradient(circle at 75% 18%, rgba(143, 230, 237, 0.56), transparent 34%),
    linear-gradient(135deg, #fff 0%, #f8f7ef 100%);
}

.event-face.logo-face {
  background:
    radial-gradient(circle at 72% 24%, rgba(100, 215, 189, 0.38), transparent 32%),
    linear-gradient(135deg, #fff 0%, #f6f8ff 100%);
}

.event-face span {
  font-family: "Outfit", "Lexend", sans-serif;
  font-size: clamp(34px, 3.5vw, 48px);
  font-weight: 300;
  line-height: 0.94;
}

.event-face small {
  color: #334747;
  font-size: 14px;
  font-weight: 600;
}

.news-copy {
  flex: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  gap: 26px;
  padding: 30px;
  background: #233232;
  color: #fff;
}

.news-copy span {
  width: fit-content;
  padding: 6px 12px;
  border-radius: 8px;
  background: #fff;
  color: #233232;
  font-size: 13px;
  font-weight: 500;
}

.news-copy h3 {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Outfit", "Lexend", sans-serif;
  font-size: clamp(22px, 2vw, 28px);
  font-weight: 300;
  line-height: 1.22;
}

.site-footer {
  position: relative;
  min-height: 520px;
  overflow: hidden;
  padding: 62px 0 34px;
  background:
    radial-gradient(circle at 7% 78%, rgba(215, 226, 74, 0.72), transparent 18%),
    radial-gradient(circle at 20% 78%, rgba(100, 215, 189, 0.72), transparent 23%),
    radial-gradient(circle at 96% 0%, rgba(255, 154, 130, 0.55), transparent 13%),
    #eef0f3;
}

.footer-art {
  position: absolute;
  left: -30px;
  bottom: -36px;
  width: min(760px, 72vw);
  opacity: 0.68;
  pointer-events: none;
}

.footer-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(280px, 0.8fr) minmax(500px, 1fr);
  gap: 56px;
}

.footer-brand {
  display: grid;
  align-content: start;
  gap: 26px;
}

.footer-brand .contact-button {
  width: fit-content;
}

.footer-columns {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 40px;
  justify-self: end;
  width: min(100%, 640px);
}

.footer-columns h3 {
  margin-bottom: 16px;
  color: #142222;
  font-size: 15px;
  font-weight: 700;
}

.footer-columns a {
  display: block;
  margin-top: 11px;
  color: #405050;
  font-size: 14px;
}

.footer-columns a:hover {
  color: #000;
}

.footer-legal {
  grid-column: 2;
  justify-self: end;
  max-width: 620px;
  margin-top: 72px;
  color: #405050;
  font-size: 13px;
  text-align: right;
}

.footer-legal p + p {
  margin-top: 14px;
}

/* 右下角返回顶部控件。 */
.to-top {
  position: fixed;
  z-index: 40;
  overflow: hidden;
  border: 0;
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.14);
}

.to-top {
  right: 22px;
  bottom: 22px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.92);
  color: #111;
  font-size: 24px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 160ms ease, transform 160ms ease;
}

.to-top.visible {
  opacity: 1;
  pointer-events: auto;
}

.to-top:hover {
  transform: translateY(-2px);
}

/* 进入视口动效只在 JS 可用时启用，避免无脚本环境内容不可见。 */
.is-enhanced .reveal {
  opacity: 0;
  transform: translateY(42px);
  transition: opacity 760ms ease, transform 760ms cubic-bezier(0.22, 1, 0.36, 1);
}

.is-enhanced .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.is-enhanced .stats-grid article,
.is-enhanced .news-card,
.is-enhanced .partner-card {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 620ms ease, transform 620ms cubic-bezier(0.22, 1, 0.36, 1);
}

.is-enhanced .reveal.is-visible .stats-grid article,
.is-enhanced .reveal.is-visible .news-card,
.is-enhanced .reveal.is-visible .partner-card {
  opacity: 1;
  transform: translateY(0);
}

.is-enhanced .reveal.is-visible .stats-grid article:nth-child(2),
.is-enhanced .reveal.is-visible .news-card:nth-child(2),
.is-enhanced .reveal.is-visible .partner-card:nth-child(2) {
  transition-delay: 90ms;
}

.is-enhanced .reveal.is-visible .stats-grid article:nth-child(3),
.is-enhanced .reveal.is-visible .news-card:nth-child(3) {
  transition-delay: 180ms;
}

.is-enhanced .reveal.is-visible .stats-grid article:nth-child(4) {
  transition-delay: 270ms;
}

@media (max-width: 1100px) {
  :root {
    --header-height: 84px;
  }

  .container,
  .header-shell {
    width: min(100% - 42px, 1180px);
  }

  .header-shell {
    grid-template-columns: 1fr auto auto auto;
  }

  .nav-area {
    position: fixed;
    inset: var(--header-height) 0 auto;
    display: block;
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
    padding: 24px 22px 30px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: 0 18px 34px rgba(0, 0, 0, 0.1);
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
    transform: translateY(-18px);
    transition:
      opacity 260ms ease,
      transform 320ms cubic-bezier(0.22, 1, 0.36, 1),
      visibility 0s linear 320ms;
  }

  body.menu-open .nav-area {
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transform: translateY(0);
    transition-delay: 0s;
  }

  .nav-area .utility-nav,
  .nav-area .main-nav {
    opacity: 0;
    transform: translateY(-8px);
    transition: opacity 260ms ease, transform 320ms cubic-bezier(0.22, 1, 0.36, 1);
  }

  body.menu-open .nav-area .utility-nav,
  body.menu-open .nav-area .main-nav {
    opacity: 1;
    transform: translateY(0);
  }

  body.menu-open .nav-area .utility-nav {
    transition-delay: 80ms;
  }

  body.menu-open .nav-area .main-nav {
    transition-delay: 150ms;
  }

  .utility-nav,
  .main-nav {
    justify-content: flex-start;
    padding: 0;
  }

  .utility-nav {
    min-height: auto;
    margin-bottom: 20px;
  }

  .main-nav {
    flex-wrap: wrap;
    align-items: flex-start;
    gap: 14px 20px;
    padding-top: 20px;
  }

  .main-nav a::after,
  .nav-preview {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .contact-button {
    padding-inline: 22px;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .solution-row,
  .trusted-grid,
  .investors-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .solution-links {
    padding-top: 0;
  }

  .footer-columns,
  .footer-legal {
    grid-column: auto;
    justify-self: stretch;
    text-align: left;
  }
}

@media (max-width: 780px) {
  body {
    font-size: 15px;
  }

  .container,
  .header-shell {
    width: min(100% - 28px, 1180px);
  }

  .brand {
    width: 146px;
    min-width: 128px;
    height: 62px;
  }

  .header-shell > .contact-button {
    display: none;
  }

  .hero-section {
    min-height: 680px;
    padding-top: calc(var(--header-height) + 80px);
  }

  .hero-copy {
    max-width: 340px;
  }

  .stats-section {
    padding: 76px 0 54px;
  }

  .stats-grid {
    gap: 36px 24px;
  }

  .scan-hero {
    min-height: 520px;
  }

  .scan-copy {
    width: 100%;
    padding: 46px 26px;
  }

  .solutions-section > .container > h2,
  .partners-section h2,
  .trusted-section h2,
  .platform-section h2,
  .investors-section h2,
  .news-section h2 {
    font-size: clamp(31px, 8.8vw, 40px);
  }

  .solution-row {
    gap: 36px;
    padding: 58px 0 62px;
  }

  .solution-links,
  .solution-links.single-column,
  .partner-grid,
  .news-grid,
  .footer-columns {
    grid-template-columns: 1fr;
  }

  .partner-card {
    min-height: 360px;
  }

  .trusted-section {
    padding-top: 80px;
  }

  .testimonial {
    padding-bottom: 76px;
  }

  .platform-section,
  .investors-section {
    padding: 86px 0;
  }

  .section-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .news-card {
    min-height: auto;
  }

  .footer-art {
    width: 92vw;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }

  .is-enhanced .reveal,
  .is-enhanced .stats-grid article,
  .is-enhanced .news-card,
  .is-enhanced .partner-card {
    opacity: 1;
    transform: none;
  }
}

@media (max-width: 520px) {
  h1 {
    font-size: 38px;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    text-align: left;
  }

  .stats-grid article {
    justify-items: start;
  }

  .stats-grid strong {
    font-size: 48px;
  }

  .solution-links a {
    align-items: flex-start;
  }

  .partner-card,
  .news-copy,
  .event-face {
    padding-inline: 22px;
  }

  .to-top {
    right: 14px;
    bottom: 16px;
  }
}

/* 默认黑夜主题：不是简单反色，而是把各区块统一到深邃黑色背景和高对比文字。 */
html[data-theme="dark"] {
  --ink: #f4f8f8;
  --deep: #dce8e8;
  --muted: #9fb0b0;
  --line: rgba(255, 255, 255, 0.16);
  --paper: #040608;
  --soft: #10171b;
  --mist: #0b1115;
  color-scheme: dark;
}

html[data-theme="dark"] body {
  background:
    radial-gradient(circle at 16% 8%, rgba(0, 201, 234, 0.12), transparent 28%),
    radial-gradient(circle at 84% 3%, rgba(255, 154, 130, 0.1), transparent 22%),
    #040608;
  color: var(--deep);
}

html[data-theme="dark"] body.menu-open .site-header {
  background: #05080a;
  opacity: 1;
}

html[data-theme="dark"] .site-header {
  background: rgba(4, 6, 8, 0.76);
  border-bottom-color: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(18px) saturate(1.2);
}

html[data-theme="dark"] .site-header.is-scrolled {
  background: rgba(4, 6, 8, 0.82);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(12px) saturate(1.4);
  opacity: 0.98;
}

html[data-theme="dark"] .brand-logo {
  filter: brightness(1.2) contrast(1.08);
}

html[data-theme="dark"] .utility-nav,
html[data-theme="dark"] .main-nav {
  color: rgba(232, 242, 242, 0.82);
}

html[data-theme="dark"] .main-nav {
  border-top-color: rgba(255, 255, 255, 0.14);
}

html[data-theme="dark"] .utility-nav a:hover,
html[data-theme="dark"] .main-nav a:hover {
  color: #fff;
  opacity: 0.86;
}

html[data-theme="dark"] .main-nav a::after {
  background: var(--accent);
}

html[data-theme="dark"] .nav-preview {
  background: #10171b;
  color: var(--deep);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.5);
}

html[data-theme="dark"] .nav-preview strong {
  color: #fff;
}

html[data-theme="dark"] .nav-preview span {
  color: rgba(220, 232, 232, 0.72);
}

html[data-theme="dark"] .menu-toggle {
  border-color: rgba(255, 255, 255, 0.2);
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
}

html[data-theme="dark"] .theme-toggle {
  border-color: rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.07);
  color: #f4f8f8;
  box-shadow: none;
}

html[data-theme="dark"] .theme-toggle:hover {
  border-color: rgba(0, 201, 234, 0.65);
  background: rgba(0, 201, 234, 0.12);
  color: #63e7f7;
  box-shadow: 0 0 24px rgba(0, 201, 234, 0.16);
}

html[data-theme="dark"] .menu-toggle:hover {
  border-color: rgba(0, 201, 234, 0.7);
  background: rgba(0, 201, 234, 0.12);
}

html[data-theme="dark"] .contact-button,
html[data-theme="dark"] .pill-link.dark,
html[data-theme="dark"] .pill-link.light {
  background: #f4f8f8;
  color: #05080a;
}

html[data-theme="dark"] .contact-button:hover,
html[data-theme="dark"] .pill-link.dark:hover,
html[data-theme="dark"] .pill-link.light:hover,
html[data-theme="dark"] .outline-button:hover {
  background: var(--accent);
  color: #05080a;
}

html[data-theme="dark"] .outline-button {
  border-color: rgba(255, 255, 255, 0.58);
  color: #fff;
}

html[data-theme="dark"] .hero-section {
  background:
    radial-gradient(circle at 15% 78%, rgba(215, 226, 74, 0.34), transparent 18%),
    radial-gradient(circle at 30% 80%, rgba(0, 201, 234, 0.28), transparent 26%),
    radial-gradient(circle at 84% 11%, rgba(255, 154, 130, 0.18), transparent 20%),
    linear-gradient(105deg, #031013 0%, #040608 48%, #110b0b 100%);
}

html[data-theme="dark"] .hero-art,
html[data-theme="dark"] .footer-art {
  opacity: 0.28;
  filter: invert(1) saturate(0.7) brightness(0.82);
  mix-blend-mode: screen;
}

html[data-theme="dark"] .hero-kicker {
  color: rgba(244, 248, 248, 0.88);
}

html[data-theme="dark"] .hero-copy,
html[data-theme="dark"] .solution-intro p,
html[data-theme="dark"] .platform-copy p,
html[data-theme="dark"] .investors-grid p,
html[data-theme="dark"] .partner-card p,
html[data-theme="dark"] .footer-columns a,
html[data-theme="dark"] .footer-legal {
  color: rgba(220, 232, 232, 0.72);
}

html[data-theme="dark"] .stats-section,
html[data-theme="dark"] .feature-band,
html[data-theme="dark"] .solutions-section,
html[data-theme="dark"] .partners-section,
html[data-theme="dark"] .investors-section,
html[data-theme="dark"] .news-section {
  background: #040608;
}

html[data-theme="dark"] .stats-grid strong,
html[data-theme="dark"] .stats-grid span,
html[data-theme="dark"] .solution-intro h3,
html[data-theme="dark"] .section-heading a,
html[data-theme="dark"] .footer-columns h3 {
  color: var(--ink);
}

html[data-theme="dark"] .stats-grid strong::after {
  background: rgba(255, 255, 255, 0.24);
}

html[data-theme="dark"] .scan-hero {
  box-shadow: 0 28px 70px rgba(0, 0, 0, 0.42);
}

html[data-theme="dark"] .solution-row {
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

html[data-theme="dark"] .solution-links a {
  color: rgba(232, 242, 242, 0.86);
}

html[data-theme="dark"] .solution-links a:hover {
  color: #fff;
  border-color: rgba(0, 201, 234, 0.45);
}

html[data-theme="dark"] .solution-links span,
html[data-theme="dark"] .section-heading span {
  background: #f4f8f8;
  color: #05080a;
}

html[data-theme="dark"] .screening-icon::before {
  border-color: #e9f6f8;
  background:
    linear-gradient(90deg, transparent 46%, #e9f6f8 46% 50%, transparent 50%),
    linear-gradient(#1388a2, #00c9ea);
}

html[data-theme="dark"] .screening-icon::after,
html[data-theme="dark"] .oncology-icon,
html[data-theme="dark"] .oncology-icon::after {
  border-color: #e9f6f8;
}

html[data-theme="dark"] .oncology-icon {
  background:
    radial-gradient(circle at 57% 30%, #e9f6f8 0 10px, transparent 11px),
    radial-gradient(circle at 32% 41%, #e9f6f8 0 4px, transparent 5px),
    radial-gradient(circle at 68% 62%, #e9f6f8 0 4px, transparent 5px),
    radial-gradient(circle at 30% 70%, #e9f6f8 0 3px, transparent 4px),
    #0f6f86;
}

html[data-theme="dark"] .partner-card {
  background: #10171b;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

html[data-theme="dark"] .trusted-section {
  background: #020304;
}

html[data-theme="dark"] .logo-cloud span {
  border-color: rgba(255, 255, 255, 0.22);
  color: rgba(255, 255, 255, 0.84);
}

html[data-theme="dark"] .trusted-section::after {
  background:
    radial-gradient(circle at 84% 30%, rgba(0, 201, 234, 0.34), transparent 16%),
    url("./assets/hero-cells.svg") right bottom / 760px auto no-repeat,
    #020304;
  filter: saturate(0.8);
}

html[data-theme="dark"] .platform-section {
  background: linear-gradient(180deg, #0b1115 0%, #040608 100%);
}

html[data-theme="dark"] .news-card {
  background: #11191d;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.08);
}

html[data-theme="dark"] .event-face,
html[data-theme="dark"] .event-face.pale,
html[data-theme="dark"] .event-face.logo-face {
  background:
    radial-gradient(circle at 78% 14%, rgba(0, 201, 234, 0.2), transparent 32%),
    linear-gradient(135deg, #121a1f 0%, #080c0f 100%);
  color: #f4f8f8;
}

html[data-theme="dark"] .event-face small {
  color: rgba(220, 232, 232, 0.72);
}

html[data-theme="dark"] .news-copy {
  background: #0b1115;
  color: #fff;
}

html[data-theme="dark"] .news-copy span {
  background: rgba(255, 255, 255, 0.92);
  color: #0b1115;
}

html[data-theme="dark"] .site-footer {
  background:
    radial-gradient(circle at 8% 78%, rgba(215, 226, 74, 0.28), transparent 18%),
    radial-gradient(circle at 20% 78%, rgba(0, 201, 234, 0.22), transparent 23%),
    radial-gradient(circle at 96% 0%, rgba(255, 154, 130, 0.2), transparent 13%),
    #06090c;
}

html[data-theme="dark"] .footer-columns a:hover {
  color: #fff;
}

html[data-theme="dark"] .to-top {
  background: rgba(11, 17, 21, 0.92);
  color: #fff;
}

@media (max-width: 1100px) {
  html[data-theme="dark"] .nav-area {
    background: #05080a;
    box-shadow: 0 18px 40px rgba(0, 0, 0, 0.55);
  }
}