:root {
  color-scheme: dark;
  --bg: #000;
  --text: #fff;
  --muted: rgba(255, 255, 255, 0.62);
  --dim: rgba(255, 255, 255, 0.38);
  --line: rgba(255, 255, 255, 0.72);
  --page-scale: 1;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-y: scroll;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-x: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", "Segoe UI", Arial, sans-serif;
}

a,
button {
  color: inherit;
  font: inherit;
}

a {
  text-decoration: none;
}

.page-frame {
  position: relative;
  width: 100%;
  overflow: hidden;
  background: #000;
}

.design-canvas {
  position: relative;
  width: 3840px;
  height: 6694px;
  overflow: hidden;
  transform: scale(var(--page-scale));
  transform-origin: top left;
  background: #000;
}

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 40;
  height: calc(263px * var(--page-scale));
  min-height: 64px;
  overflow: hidden;
  background: #000;
}

.brand {
  position: absolute;
  left: calc(153px * var(--page-scale));
  top: calc(85px * var(--page-scale));
  display: grid;
  line-height: 1.05;
  transform: scale(var(--page-scale));
  transform-origin: top left;
}

.brand strong,
.contact__brand strong {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.05;
}

.brand span,
.contact__brand span {
  margin-top: 4px;
  font-size: 28px;
  font-weight: 800;
  line-height: 1.05;
}

.brand small,
.contact__brand small {
  margin-top: 6px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 17px;
  line-height: 1.15;
}

.site-nav {
  position: absolute;
  top: calc(112px * var(--page-scale));
  left: calc(1510px * var(--page-scale));
  display: flex;
  gap: 205px;
  align-items: center;
  white-space: nowrap;
  color: rgba(255, 255, 255, 0.88);
  font-size: 22px;
  line-height: 1;
  transform: scale(var(--page-scale));
  transform-origin: top left;
}

.site-nav a {
  transition: opacity 160ms ease;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  opacity: 0.68;
  outline: none;
}

.hero {
  position: absolute;
  left: 0;
  top: 263px;
  width: 3840px;
  height: 1579px;
  overflow: hidden;
}

.hero__image {
  position: absolute;
  left: -159px;
  top: 20px;
  width: 4158px;
  height: 1559px;
  object-fit: fill;
  opacity: 0.67;
}

.hero__shade {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(0, 0, 0, 0) 73%, #000 100%),
    radial-gradient(circle at 50% 73%, rgba(0, 0, 0, 0) 0 13%, rgba(0, 0, 0, 0.5) 55%, rgba(0, 0, 0, 0.78) 100%);
  pointer-events: none;
}

.hero__copy {
  position: absolute;
  left: 0;
  right: 0;
  top: 1277px;
  text-align: center;
}

.hero h1 {
  margin: 0;
  font-size: 70px;
  font-weight: 800;
  letter-spacing: 0.02em;
  line-height: 1.15;
}

.hero p {
  margin: 38px 0 0;
  font-size: 29px;
  font-weight: 700;
  line-height: 1.2;
}

.info-section,
.awards-section,
.contact {
  position: absolute;
  left: 0;
  width: 3840px;
}

.info-section--about {
  top: 2772px;
  height: 500px;
}

.info-section--research {
  top: 3512px;
  height: 720px;
}

.awards-section {
  top: 4543px;
  height: 1220px;
}

.section-rule {
  position: absolute;
  left: 506px;
  top: 0;
  width: 2828px;
  height: 3px;
  background: var(--line);
}

.section-heading {
  position: absolute;
  left: 510px;
}

.info-section .section-heading {
  top: 63px;
}

.awards-section .section-heading {
  top: 275px;
}

.section-heading h2 {
  margin: 0;
  font-size: 70px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

.section-heading p {
  margin: 47px 0 0;
  color: var(--dim);
  font-size: 32px;
  font-weight: 300;
  line-height: 1.1;
}

.section-copy {
  position: absolute;
  left: 1700px;
  top: 72px;
  width: 1600px;
  margin: 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 30px;
  font-weight: 300;
  line-height: 2.15;
  letter-spacing: 0.01em;
}

.info-section--research .section-copy {
  top: 96px;
  line-height: 2.18;
}

.award-logos {
  position: absolute;
  left: 540px;
  top: 542px;
  display: grid;
  grid-template-columns: 514px 143px 267px 195px 332px 301px 354px;
  column-gap: 128px;
  align-items: center;
}

.award-logos img {
  display: block;
  width: 100%;
  height: auto;
  max-height: 224px;
  object-fit: contain;
}

.award-list {
  position: absolute;
  left: 705px;
  top: 962px;
  width: 2500px;
  margin: 0;
  padding: 0;
  color: rgba(255, 255, 255, 0.78);
  font-size: 29px;
  font-weight: 300;
  line-height: 2.32;
  text-align: center;
  list-style: none;
}

.award-list li {
  margin: 0;
}

.contact {
  top: 6876px;
  height: 1948px;
}

.contact__intro-block {
  position: absolute;
  left: 340px;
  top: 0;
  width: 1250px;
}

.contact h2 {
  margin: 0;
  font-size: 150px;
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.08;
}

.contact__intro {
  margin: 158px 0 0;
  color: rgba(255, 255, 255, 0.56);
  font-size: 31px;
  font-weight: 300;
  line-height: 1.7;
}

.contact__brand {
  display: grid;
  margin-top: 390px;
  line-height: 1.05;
}

.contact__slogan {
  margin: 129px 0 0;
  color: rgba(255, 255, 255, 0.48);
  font-size: 36px;
  font-weight: 300;
  line-height: 1.25;
}

.contact-list {
  position: absolute;
  left: 2154px;
  top: 452px;
  display: grid;
  gap: 236px;
  width: 980px;
}

.contact-list h3 {
  margin: 0 0 42px;
  font-size: 34px;
  font-weight: 800;
  line-height: 1.15;
}

.contact-list p,
.contact-list a {
  margin: 0 0 22px;
  color: rgba(255, 255, 255, 0.62);
  font-size: 32px;
  font-weight: 300;
  line-height: 1.22;
}

.contact-list p:last-child,
.contact-list a:last-child {
  margin-bottom: 0;
}

.site-footer {
  position: absolute;
  left: 340px;
  bottom: 263px;
  color: rgba(255, 255, 255, 0.48);
  font-size: 30px;
  font-weight: 300;
  line-height: 1;
}

.back-to-top {
  position: fixed;
  right: clamp(14px, 2.4vw, 34px);
  bottom: clamp(14px, 2.4vw, 34px);
  z-index: 30;
  display: grid;
  justify-items: center;
  gap: 7px;
  width: 54px;
  min-height: 112px;
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 11px 8px;
  background: rgba(0, 0, 0, 0.9);
  color: var(--text);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition:
    opacity 180ms ease,
    transform 180ms ease;
}

.back-to-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top span:first-child {
  display: grid;
  place-items: center;
  width: 24px;
  height: 24px;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 16px;
  line-height: 1;
}

.back-to-top span:last-child {
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.08em;
  line-height: 1;
}

@media (max-width: 560px) {
  .back-to-top {
    width: 48px;
    min-height: 98px;
  }
}
/* Arrow-only back-to-top appearance; behavior remains in back-to-top.js. */
.back-to-top.liquid-glass-back-to-top,
.back-to-top.liquid-glass-back-to-top--text-inside,
.back-to-top.liquid-glass-back-to-top--text-outside {
  display: grid !important;
  place-items: center !important;
  width: 40px !important;
  height: 40px !important;
  min-height: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  overflow: visible !important;
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
}

.back-to-top.liquid-glass-surface::before,
.back-to-top.liquid-glass-surface::after,
.back-to-top .liquid-glass-surface::before,
.back-to-top .liquid-glass-surface::after,
.back-to-top.liquid-glass-back-to-top--text-outside::before,
.back-to-top.liquid-glass-back-to-top--text-outside::after {
  display: none !important;
  content: none !important;
}

.back-to-top.liquid-glass-back-to-top .liquid-glass-back-to-top__label,
.back-to-top.liquid-glass-back-to-top .liquid-glass-back-to-top__outside-label {
  display: none !important;
}

.back-to-top.liquid-glass-back-to-top--text-outside .liquid-glass-back-to-top__glass {
  display: grid !important;
  place-items: center !important;
  width: 40px !important;
  height: 40px !important;
  min-height: 0 !important;
  padding: 0 !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  -webkit-backdrop-filter: none !important;
  backdrop-filter: none !important;
}

.back-to-top.liquid-glass-back-to-top .liquid-glass-back-to-top__icon {
  display: grid !important;
  place-items: center !important;
  width: 40px !important;
  height: 40px !important;
  border: 0 !important;
  border-radius: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
  font-size: 32px !important;
  font-weight: 300 !important;
  line-height: 1 !important;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.55);
}

.back-to-top.liquid-glass-back-to-top:hover,
.back-to-top.liquid-glass-back-to-top:focus-visible {
  border: 0 !important;
  background: transparent !important;
  box-shadow: none !important;
}