:root {
  color-scheme: light;
  --ink: #12181a;
  --ink-soft: #566064;
  --paper: #f4f6f3;
  --paper-bright: #fbfcfa;
  --line: rgba(18, 24, 26, 0.14);
  --accent: #36d6ad;
  --accent-deep: #0e896c;
  --dark: #101718;
  --dark-soft: #182122;
  --white: #f8fbf9;
  --shell: min(1380px, calc(100vw - 96px));
  --header-height: 78px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family:
    "PingFang SC", "Microsoft YaHei", "Noto Sans CJK SC", system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
}
body.menu-open {
  overflow: hidden;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  color: inherit;
  font: inherit;
}
img {
  display: block;
  width: 100%;
}
.shell {
  width: var(--shell);
  margin-inline: auto;
}
.section {
  padding: 140px 0;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
}
.skip-link {
  position: fixed;
  top: -100px;
  left: 20px;
  z-index: 999;
  padding: 12px 18px;
  background: var(--accent);
  color: #07110f;
  transition: top 0.2s;
}
.skip-link:focus {
  top: 12px;
}

.site-header {
  position: fixed;
  z-index: 100;
  inset: 0 0 auto;
  height: var(--header-height);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  padding: 0 48px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.17);
  color: white;
  transition:
    color 0.4s,
    background 0.4s,
    border-color 0.4s,
    transform 0.4s var(--ease);
}
.site-header.is-scrolled {
  color: var(--ink);
  background: rgba(248, 250, 247, 0.93);
  border-color: var(--line);
  backdrop-filter: blur(18px);
}
.site-header.is-hidden {
  transform: translateY(-105%);
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  width: max-content;
}
.brand-mark {
  position: relative;
  display: inline-block;
  width: 34px;
  height: 34px;
  flex: 0 0 auto;
}
.brand-mark i {
  position: absolute;
  display: block;
  background: currentColor;
}
.brand-mark i:nth-child(1) {
  width: 7px;
  height: 28px;
  left: 1px;
  top: 3px;
  transform: skewY(-28deg);
}
.brand-mark i:nth-child(2) {
  width: 7px;
  height: 22px;
  left: 13px;
  top: 6px;
  transform: skewY(28deg);
}
.brand-mark i:nth-child(3) {
  width: 7px;
  height: 28px;
  right: 1px;
  top: 3px;
  transform: skewY(-28deg);
  color: var(--accent);
}
.brand-copy {
  display: grid;
  line-height: 1.1;
  gap: 5px;
  letter-spacing: 0.05em;
}
.brand-copy strong {
  font-size: 14px;
  font-weight: 650;
}
.brand-copy small {
  font-size: 11px;
  opacity: 0.68;
  letter-spacing: 0.35em;
}
.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(22px, 2.5vw, 44px);
  height: 100%;
}
.desktop-nav a {
  position: relative;
  display: grid;
  height: 100%;
  place-items: center;
  font-size: 13px;
  letter-spacing: 0.06em;
  opacity: 0.76;
}
.desktop-nav a::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transform: translateX(-50%);
  transition: width 0.35s var(--ease);
}
.desktop-nav a:hover,
.desktop-nav a:focus-visible,
.desktop-nav a.is-active {
  opacity: 1;
}
.desktop-nav a:hover::after,
.desktop-nav a.is-active::after {
  width: 100%;
}
.header-actions {
  justify-self: end;
  display: flex;
  align-items: center;
  gap: 20px;
}
.search-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  letter-spacing: 0.08em;
}
.search-link svg {
  width: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}
.guest-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 650;
}
.guest-entry i {
  color: var(--ink-soft);
  font-style: normal;
  opacity: 0.38;
}
.guest-entry a {
  position: relative;
  padding: 8px 0;
}
.guest-entry a::after {
  content: "";
  position: absolute;
  right: 0;
  bottom: 3px;
  left: 0;
  height: 2px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 0.3s var(--ease);
}
.guest-entry a:hover::after,
.guest-entry a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}
.member-entry,
.participation-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 38px;
  font-size: 12px;
  font-weight: 650;
}
.member-entry i {
  display: grid;
  place-items: center;
  width: 29px;
  height: 29px;
  color: var(--paper-bright);
  background: var(--ink);
  border-radius: 50%;
  font-style: normal;
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--accent) 12%, transparent);
}
.participation-link {
  padding: 0 13px;
  color: var(--accent-deep);
  border: 1px solid color-mix(in srgb, var(--accent) 32%, var(--line));
  background: color-mix(in srgb, var(--paper-bright) 66%, transparent);
}
.participation-link b {
  display: grid;
  place-items: center;
  min-width: 21px;
  height: 21px;
  padding: 0 6px;
  color: var(--paper-bright);
  background: var(--accent);
  border-radius: 20px;
  font-size: 9px;
}
.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 0;
  background: none;
  padding: 11px 6px;
  cursor: pointer;
}
.menu-toggle span:not(.sr-only) {
  display: block;
  height: 1px;
  margin: 6px 0;
  background: currentColor;
  transition:
    transform 0.3s,
    opacity 0.3s;
}
.menu-toggle[aria-expanded="true"] span:first-child {
  transform: translateY(3.5px) rotate(45deg);
}
.menu-toggle[aria-expanded="true"] span:nth-child(2) {
  transform: translateY(-3.5px) rotate(-45deg);
}
.mobile-menu {
  position: fixed;
  z-index: 90;
  inset: 0;
  padding: 130px 28px 40px;
  background: var(--dark);
  color: white;
}
.mobile-menu nav {
  display: grid;
}
.mobile-menu nav a {
  padding: 15px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
  font-size: clamp(24px, 8vw, 38px);
  font-weight: 520;
}
.mobile-menu p {
  position: absolute;
  left: 28px;
  bottom: 30px;
  margin: 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 12px;
  letter-spacing: 0.08em;
}

.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
  background: #0d1314;
  color: white;
}
.hero-slides,
.hero-slide {
  position: absolute;
  inset: 0;
}
.hero-slide {
  visibility: hidden;
  clip-path: inset(0 0 0 100%);
  transition:
    clip-path 1.1s var(--ease),
    visibility 0s 1.1s;
}
.hero-slide.is-active {
  visibility: visible;
  z-index: 2;
  clip-path: inset(0);
  transition:
    clip-path 1.1s var(--ease),
    visibility 0s;
}
.hero-media,
.hero-shade {
  position: absolute;
  inset: 0;
}
.hero-media img {
  height: 100%;
  object-fit: cover;
  transform: scale(1.06);
  transition: transform 7s ease-out;
}
.hero-slide.is-active .hero-media img {
  transform: scale(1);
}
.hero-shade {
  background:
    linear-gradient(
      90deg,
      rgba(8, 15, 16, 0.88) 0%,
      rgba(8, 15, 16, 0.61) 42%,
      rgba(8, 15, 16, 0.17) 72%,
      rgba(8, 15, 16, 0.43) 100%
    ),
    linear-gradient(0deg, rgba(6, 12, 13, 0.68), transparent 42%);
}
.hero-shade::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to right, black, transparent 70%);
}
.hero-grid {
  position: relative;
  z-index: 2;
  height: 100%;
  display: grid;
  grid-template-columns: minmax(0, 1.7fr) 0.55fr;
  align-items: center;
  padding-top: var(--header-height);
}
.hero-content {
  width: min(860px, 70vw);
  padding: 5vh 0 12vh;
}
.hero-eyebrow {
  display: flex;
  align-items: center;
  gap: 18px;
  margin: 0 0 32px;
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
  letter-spacing: 0.25em;
  opacity: 0;
  transform: translateY(25px);
}
.hero-eyebrow span {
  display: grid;
  place-items: center;
  width: 38px;
  height: 23px;
  color: var(--accent);
  border: 1px solid rgba(54, 214, 173, 0.7);
  letter-spacing: 0.08em;
}
.hero h1 {
  margin: 0;
  font-size: clamp(54px, 6.2vw, 104px);
  line-height: 1.12;
  letter-spacing: -0.025em;
  font-weight: 540;
  text-wrap: balance;
  opacity: 0;
  transform: translateY(45px);
}
.hero-summary {
  width: min(580px, 80%);
  margin: 34px 0 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 16px;
  line-height: 1.9;
  opacity: 0;
  transform: translateY(28px);
}
.primary-link {
  display: inline-flex;
  align-items: center;
  gap: 42px;
  margin-top: 40px;
  padding: 5px 5px 5px 20px;
  border-left: 2px solid var(--accent);
  font-size: 14px;
  opacity: 0;
  transform: translateY(20px);
}
.primary-link i {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  background: var(--accent);
  color: #07110f;
  font-style: normal;
  transition:
    transform 0.35s var(--ease),
    background 0.35s;
}
.primary-link:hover i {
  transform: translate(4px, -4px);
  background: white;
}
.hero-slide.is-active .hero-eyebrow,
.hero-slide.is-active h1,
.hero-slide.is-active .hero-summary,
.hero-slide.is-active .primary-link {
  opacity: 1;
  transform: none;
  transition:
    opacity 0.8s var(--ease),
    transform 0.8s var(--ease);
}
.hero-slide.is-active .hero-eyebrow {
  transition-delay: 0.25s;
}
.hero-slide.is-active h1 {
  transition-delay: 0.35s;
}
.hero-slide.is-active .hero-summary {
  transition-delay: 0.48s;
}
.hero-slide.is-active .primary-link {
  transition-delay: 0.6s;
}
.hero-side-note {
  align-self: end;
  justify-self: end;
  margin-bottom: 16vh;
  padding-left: 22px;
  border-left: 1px solid rgba(255, 255, 255, 0.35);
}
.hero-side-note span {
  font-size: 10px;
  color: var(--accent);
  letter-spacing: 0.3em;
}
.hero-side-note p {
  width: 130px;
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.75);
  font-size: 12px;
  line-height: 1.6;
}
.hero-controls {
  position: absolute;
  z-index: 10;
  left: 50%;
  bottom: 38px;
  display: grid;
  grid-template-columns: 110px 1fr auto;
  align-items: center;
  gap: 28px;
  transform: translateX(-50%);
}
.hero-counter {
  display: flex;
  align-items: baseline;
  gap: 6px;
  font-variant-numeric: tabular-nums;
}
.hero-counter b {
  color: var(--accent);
  font-size: 22px;
  font-weight: 500;
}
.hero-counter span,
.hero-counter small {
  color: rgba(255, 255, 255, 0.48);
  font-size: 11px;
}
.hero-timeline {
  height: 1px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.28);
}
.hero-timeline i {
  display: block;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
}
.hero-timeline i.is-running {
  animation: progress 6.5s linear forwards;
}
.hero-buttons {
  display: flex;
  border: 1px solid rgba(255, 255, 255, 0.24);
}
.hero-buttons button {
  display: grid;
  place-items: center;
  width: 47px;
  height: 42px;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.24);
  background: rgba(10, 17, 18, 0.25);
  color: white;
  cursor: pointer;
  transition:
    background 0.25s,
    color 0.25s;
}
.hero-buttons button:last-child {
  border: 0;
}
.hero-buttons button:hover,
.hero-buttons button:focus-visible {
  background: var(--accent);
  color: #07110f;
}
.scroll-cue {
  position: absolute;
  z-index: 10;
  right: 22px;
  bottom: 58px;
  display: flex;
  align-items: center;
  gap: 13px;
  color: rgba(255, 255, 255, 0.52);
  font-size: 10px;
  letter-spacing: 0.18em;
  writing-mode: vertical-rl;
}
.scroll-cue i {
  position: relative;
  width: 1px;
  height: 45px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.25);
}
.scroll-cue i::after {
  content: "";
  position: absolute;
  inset: 0;
  background: white;
  animation: scrollline 2s ease-in-out infinite;
}
@keyframes progress {
  to {
    transform: scaleX(1);
  }
}
@keyframes scrollline {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(100%);
  }
}

.section-heading {
  display: grid;
  grid-template-columns: 1fr 1.5fr 1fr;
  align-items: end;
  gap: 30px;
  padding-bottom: 38px;
  border-bottom: 1px solid var(--line);
}
.section-heading > div {
  display: flex;
  align-items: center;
  gap: 18px;
}
.section-number {
  display: grid;
  place-items: center;
  width: 34px;
  height: 22px;
  color: var(--accent-deep);
  border: 1px solid rgba(14, 137, 108, 0.4);
  font-size: 10px;
}
.section-heading > div p {
  margin: 0;
  color: var(--ink-soft);
  font-size: 10px;
  letter-spacing: 0.2em;
}
.section-heading h2 {
  margin: 0;
  font-size: clamp(42px, 5vw, 74px);
  line-height: 1.12;
  font-weight: 520;
  letter-spacing: -0.025em;
}
.heading-note {
  margin: 0;
  color: var(--ink-soft);
  font-size: 13px;
  line-height: 1.8;
}
.policy-layout {
  display: grid;
  grid-template-columns: 1.06fr 0.94fr;
  gap: clamp(46px, 6vw, 96px);
  padding-top: 70px;
}
.policy-image {
  position: relative;
  display: block;
  height: clamp(340px, 41vw, 590px);
  overflow: hidden;
}
.policy-image img {
  height: 100%;
  object-fit: cover;
}
.image-zoom img {
  transition: transform 0.8s var(--ease);
}
.image-zoom:hover img {
  transform: scale(1.035);
}
.image-tag {
  position: absolute;
  top: 0;
  left: 0;
  padding: 12px 18px;
  background: var(--accent);
  color: #07110f;
  font-size: 11px;
  letter-spacing: 0.12em;
}
.policy-feature-copy {
  display: grid;
  grid-template-columns: 110px 1fr;
  column-gap: 25px;
  margin-top: 32px;
}
.policy-feature-copy .meta {
  grid-row: 1 / span 3;
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 5px 0 0;
  color: var(--ink-soft);
  font-size: 11px;
}
.policy-feature-copy .meta span {
  color: var(--accent-deep);
}
.policy-feature-copy h3 {
  margin: 0;
  font-size: clamp(25px, 2.3vw, 38px);
  line-height: 1.35;
  font-weight: 530;
  letter-spacing: -0.025em;
}
.policy-feature-copy > p:not(.meta) {
  margin: 18px 0 0;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.9;
}
.text-link {
  width: max-content;
  margin-top: 25px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--ink);
  font-size: 12px;
  letter-spacing: 0.08em;
}
.text-link span {
  margin-left: 15px;
  transition: margin 0.25s;
}
.text-link:hover span {
  margin-left: 22px;
}
.policy-list-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 0 22px;
  border-bottom: 2px solid var(--ink);
}
.policy-list-head span {
  font-size: 11px;
  letter-spacing: 0.18em;
}
.policy-list-head a {
  color: var(--ink-soft);
  font-size: 11px;
}
.policy-list-head i {
  margin-left: 8px;
  color: var(--accent-deep);
  font-style: normal;
}
.policy-list article {
  position: relative;
  padding: 31px 48px 31px 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 0.35s var(--ease);
}
.policy-list article:hover {
  padding-left: 16px;
}
.policy-meta {
  display: flex;
  gap: 15px;
  color: var(--ink-soft);
  font-size: 10px;
  letter-spacing: 0.07em;
}
.policy-meta span {
  color: var(--accent-deep);
}
.policy-list h3 {
  margin: 14px 0 0;
  font-size: clamp(17px, 1.5vw, 22px);
  line-height: 1.55;
  font-weight: 520;
}
.item-arrow {
  position: absolute;
  right: 5px;
  top: 50%;
  color: var(--accent-deep);
  font-size: 18px;
  transform: translate(-5px, -50%);
  opacity: 0;
  transition:
    opacity 0.25s,
    transform 0.25s;
}
.policy-list article:hover .item-arrow {
  opacity: 1;
  transform: translate(0, -50%);
}

.fields {
  color: var(--white);
  background: var(--dark);
  overflow: hidden;
}
.section-heading-light {
  border-color: rgba(255, 255, 255, 0.15);
}
.section-heading-light .section-number {
  color: var(--accent);
  border-color: rgba(54, 214, 173, 0.5);
}
.section-heading-light > div p,
.section-heading-light .heading-note {
  color: rgba(255, 255, 255, 0.52);
}
.category-tabs {
  display: flex;
  gap: 0;
  overflow-x: auto;
  margin-top: 58px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  scrollbar-width: none;
}
.category-tabs::-webkit-scrollbar {
  display: none;
}
.category-tabs button {
  position: relative;
  flex: 1 0 auto;
  min-width: 145px;
  padding: 0 20px 22px;
  border: 0;
  background: none;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
  text-align: left;
  cursor: pointer;
  transition: color 0.3s;
}
.category-tabs button span {
  margin-right: 12px;
  color: rgba(255, 255, 255, 0.25);
  font-size: 9px;
}
.category-tabs button::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -1px;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: width 0.45s var(--ease);
}
.category-tabs button:hover,
.category-tabs button[aria-selected="true"] {
  color: white;
}
.category-tabs button[aria-selected="true"] span {
  color: var(--accent);
}
.category-tabs button[aria-selected="true"]::after {
  width: 100%;
}
.category-stage {
  margin-top: 54px;
}
.category-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(380px, 0.88fr);
  min-height: 640px;
  background: var(--dark-soft);
}
.category-panel[hidden] {
  display: none;
}
.category-panel.is-entering {
  animation: panel-in 0.65s var(--ease);
}
@keyframes panel-in {
  from {
    opacity: 0.25;
    transform: translateY(18px);
    clip-path: inset(0 0 12%);
  }
  to {
    opacity: 1;
    transform: none;
    clip-path: inset(0);
  }
}
.category-visual {
  position: relative;
  min-height: 520px;
  overflow: hidden;
}
.category-visual::after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 38%;
  background: linear-gradient(transparent, rgba(7, 13, 14, 0.5));
}
.category-visual img {
  height: 100%;
  object-fit: cover;
}
.category-visual > span {
  position: absolute;
  z-index: 2;
  left: 28px;
  bottom: 24px;
  color: rgba(255, 255, 255, 0.65);
  font-size: 9px;
  letter-spacing: 0.25em;
}
.category-copy {
  display: flex;
  flex-direction: column;
  padding: clamp(42px, 5.5vw, 78px);
}
.category-kicker {
  margin: 0 0 28px;
  color: var(--accent);
  font-size: 9px;
  letter-spacing: 0.26em;
}
.category-copy h3 {
  margin: 0;
  font-size: clamp(30px, 3.3vw, 52px);
  line-height: 1.2;
  letter-spacing: -0.02em;
  font-weight: 500;
}
.category-summary {
  margin: 28px 0 30px;
  color: rgba(255, 255, 255, 0.54);
  font-size: 13px;
  line-height: 1.9;
}
.category-copy ol {
  margin: auto 0 0;
  padding: 0;
  list-style: none;
  counter-reset: cat;
}
.category-copy li {
  counter-increment: cat;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
}
.category-copy li a {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 16px;
  padding: 15px 0;
  color: rgba(255, 255, 255, 0.76);
  font-size: 12px;
}
.category-copy li a::before {
  content: "0" counter(cat);
  color: rgba(255, 255, 255, 0.25);
  margin-right: 10px;
}
.category-copy li a span {
  grid-column: 1;
}
.category-copy li i {
  grid-column: 2;
  grid-row: 1;
  color: var(--accent);
  font-style: normal;
  opacity: 0;
  transform: translate(-5px, 4px);
  transition: 0.25s;
}
.category-copy li a:hover i {
  opacity: 1;
  transform: translate(0, 0);
}
.outline-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 100%;
  margin-top: 25px;
  padding: 15px 18px;
  border: 1px solid rgba(255, 255, 255, 0.22);
  font-size: 11px;
  transition:
    background 0.3s,
    color 0.3s;
}
.outline-link:hover {
  background: var(--accent);
  color: #07110f;
}

.about {
  background: var(--paper-bright);
}
.about-layout {
  display: grid;
  grid-template-columns: 0.65fr 1.45fr 0.7fr;
  gap: clamp(35px, 6vw, 100px);
  align-items: start;
}
.about-label {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--ink-soft);
  font-size: 10px;
  letter-spacing: 0.17em;
}
.about-label span {
  color: var(--accent-deep);
}
.about-label p {
  margin: 0;
}
.about-lead {
  margin: -10px 0 45px;
  font-size: clamp(38px, 4.2vw, 66px) !important;
  line-height: 1.3 !important;
  letter-spacing: -0.02em;
  color: var(--ink) !important;
  font-weight: 520;
}
.about-copy > p:not(.about-lead) {
  max-width: 760px;
  margin: 0;
  color: var(--ink-soft);
  font-size: 15px;
  line-height: 2.15;
  text-align: justify;
}
.dark-link {
  display: flex;
  justify-content: space-between;
  width: min(230px, 100%);
  margin-top: 45px;
  padding: 14px 4px;
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
  font-size: 12px;
}
.dark-link span {
  color: var(--accent-deep);
  transition: transform 0.3s;
}
.dark-link:hover span {
  transform: translate(4px, -4px);
}
.about-orbit {
  position: relative;
  aspect-ratio: 1;
  display: grid;
  place-items: center;
  margin-top: 70px;
}
.about-orbit span {
  position: relative;
  z-index: 3;
  font-size: 14px;
  line-height: 1.5;
  text-align: center;
}
.orbit {
  position: absolute;
  inset: 10%;
  border: 1px solid var(--line);
  border-radius: 50%;
}
.orbit::before {
  content: "";
  position: absolute;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent-deep);
  top: 9%;
  left: 20%;
}
.orbit-b {
  transform: rotate(60deg) scale(0.72);
  border-style: dashed;
}
.orbit-b::before {
  width: 7px;
  height: 7px;
  background: var(--ink);
}

.join-band {
  position: relative;
  overflow: hidden;
  padding: 118px 0 100px;
  background: var(--accent);
  color: #07110f;
}
.join-track {
  position: absolute;
  top: 0;
  left: 0;
  display: flex;
  white-space: nowrap;
  color: rgba(7, 17, 15, 0.09);
  font-size: clamp(80px, 12vw, 170px);
  font-weight: 700;
  line-height: 1;
  letter-spacing: -0.04em;
  transform: translateY(-15%);
}
.join-track span {
  animation: marquee 22s linear infinite;
}
@keyframes marquee {
  to {
    transform: translateX(-100%);
  }
}
.join-content {
  position: relative;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  align-items: end;
}
.join-content p {
  margin: 0;
  font-size: clamp(30px, 4vw, 58px);
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 520;
}
.join-content a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 220px;
  padding: 17px 20px;
  background: #0d1715;
  color: white;
  font-size: 12px;
}
.join-content a span {
  color: var(--accent);
  transition: transform 0.3s;
}
.join-content a:hover span {
  transform: translate(4px, -4px);
}

.site-footer {
  padding: 75px 0 20px;
  background: #0b1112;
  color: rgba(255, 255, 255, 0.7);
}
.footer-top {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 60px;
  padding-bottom: 65px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 18px;
  color: white;
}
.footer-brand strong {
  font-size: 17px;
  line-height: 1.45;
  font-weight: 520;
}
.footer-nav {
  display: flex;
  gap: min(7vw, 90px);
}
.footer-nav div {
  display: grid;
  gap: 12px;
}
.footer-nav p {
  margin: 0 0 8px;
  color: rgba(255, 255, 255, 0.35);
  font-size: 10px;
  letter-spacing: 0.18em;
}
.footer-nav a {
  font-size: 12px;
}
.footer-nav a:hover {
  color: var(--accent);
}
.footer-slogan {
  justify-self: end;
}
.footer-slogan p {
  margin: 0 0 22px;
  color: rgba(255, 255, 255, 0.35);
  font-size: 11px;
  line-height: 1.7;
  letter-spacing: 0.15em;
}
.footer-slogan span {
  color: white;
  font-size: 12px;
  letter-spacing: 0.2em;
}
.footer-bottom {
  display: flex;
  justify-content: space-between;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.11);
  color: rgba(255, 255, 255, 0.34);
  font-size: 10px;
}

.reveal {
  /* Content must remain visible when JavaScript or a slow asset is still loading.
     The reveal animation is progressive enhancement, never a visibility gate. */
  opacity: 1;
  transform: none;
  transition:
    opacity 0.85s var(--ease),
    transform 0.85s var(--ease);
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}

@media (max-width: 1100px) {
  :root {
    --shell: min(100% - 48px, 1000px);
  }
  .site-header {
    padding-inline: 24px;
    grid-template-columns: 1fr auto;
  }
  .desktop-nav {
    display: none;
  }
  .menu-toggle {
    display: block;
  }
  .search-link span {
    display: none;
  }
  .hero-grid {
    grid-template-columns: 1fr 0.25fr;
  }
  .hero-content {
    width: 80vw;
  }
  .section-heading {
    grid-template-columns: 0.8fr 1.2fr;
  }
  .section-heading .heading-note {
    grid-column: 2;
  }
  .policy-layout {
    gap: 45px;
  }
  .policy-feature-copy {
    grid-template-columns: 1fr;
  }
  .policy-feature-copy .meta {
    grid-row: auto;
    flex-direction: row;
    margin-bottom: 14px;
  }
  .category-panel {
    grid-template-columns: 1fr 420px;
  }
  .about-layout {
    grid-template-columns: 0.5fr 1.5fr;
  }
  .about-orbit {
    display: none;
  }
}

@media (max-width: 767px) {
  :root {
    --shell: calc(100% - 36px);
    --header-height: 68px;
  }
  .section {
    padding: 90px 0;
  }
  .site-header {
    height: var(--header-height);
    padding-inline: 18px;
  }
  .brand {
    gap: 9px;
  }
  .brand-mark {
    width: 28px;
    height: 28px;
    transform: scale(0.82);
  }
  .brand-copy strong {
    font-size: 12px;
  }
  .brand-copy small {
    font-size: 9px;
    letter-spacing: 0.24em;
  }
  .header-actions {
    gap: 7px;
  }
  .search-link {
    display: none;
  }
  .hero-grid {
    display: flex;
    align-items: flex-end;
    padding-bottom: 150px;
  }
  .hero-content {
    width: 100%;
    padding: 0;
  }
  .hero-eyebrow {
    margin-bottom: 22px;
    font-size: 10px;
    letter-spacing: 0.14em;
  }
  .hero h1 {
    font-size: clamp(42px, 13vw, 62px);
    line-height: 1.08;
  }
  .hero-summary {
    width: 94%;
    margin-top: 24px;
    font-size: 13px;
    line-height: 1.75;
  }
  .primary-link {
    margin-top: 26px;
  }
  .hero-side-note,
  .scroll-cue {
    display: none;
  }
  .hero-shade {
    background: linear-gradient(
      0deg,
      rgba(7, 13, 14, 0.95) 0%,
      rgba(7, 13, 14, 0.64) 54%,
      rgba(7, 13, 14, 0.22) 100%
    );
  }
  .hero-controls {
    bottom: 28px;
    grid-template-columns: 60px 1fr auto;
    gap: 12px;
  }
  .hero-buttons button {
    width: 38px;
    height: 38px;
  }
  .hero-buttons button:nth-child(2) {
    display: none;
  }
  .section-heading {
    display: grid;
    grid-template-columns: 1fr;
    gap: 18px;
    padding-bottom: 25px;
  }
  .section-heading h2 {
    font-size: 46px;
  }
  .section-heading .heading-note {
    grid-column: auto;
  }
  .heading-note {
    max-width: 320px;
  }
  .policy-layout {
    grid-template-columns: 1fr;
    padding-top: 42px;
    gap: 65px;
  }
  .policy-image {
    height: 68vw;
    min-height: 260px;
  }
  .policy-feature-copy {
    margin-top: 25px;
  }
  .policy-feature-copy h3 {
    font-size: 25px;
  }
  .policy-list article {
    padding-block: 24px;
  }
  .policy-list h3 {
    font-size: 17px;
  }
  .category-tabs {
    width: calc(100% + 18px);
    margin-top: 40px;
  }
  .category-tabs button {
    min-width: 118px;
    padding-inline: 10px;
  }
  .category-stage {
    margin-top: 32px;
  }
  .category-panel {
    grid-template-columns: 1fr;
    min-height: 0;
  }
  .category-visual {
    min-height: 64vw;
  }
  .category-copy {
    padding: 35px 24px 30px;
  }
  .category-copy h3 {
    font-size: 32px;
  }
  .category-summary {
    margin-block: 22px;
  }
  .category-copy ol {
    margin-top: 10px;
  }
  .about-layout {
    grid-template-columns: 1fr;
    gap: 55px;
  }
  .about-lead {
    margin-top: 0;
    font-size: 39px !important;
  }
  .about-copy > p:not(.about-lead) {
    font-size: 14px;
    line-height: 2;
    text-align: left;
  }
  .join-band {
    padding: 95px 0 65px;
  }
  .join-content {
    display: block;
  }
  .join-content p {
    font-size: 33px;
  }
  .join-content a {
    margin-top: 35px;
  }
  .footer-top {
    grid-template-columns: 1fr;
    gap: 48px;
  }
  .footer-slogan {
    justify-self: start;
  }
  .footer-bottom {
    display: grid;
    gap: 8px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --paper: #12191a;
    --paper-bright: #151d1e;
    --ink: #eef3f0;
    --ink-soft: #a2acab;
    --line: rgba(255, 255, 255, 0.14);
    --accent-deep: #58d9b7;
  }
  .site-header.is-scrolled {
    color: var(--ink);
    background: rgba(15, 22, 23, 0.93);
  }
  .policy-image,
  .category-visual {
    background: #202a2b;
  }
  .join-band {
    color: #07110f;
  }
  .join-track {
    color: rgba(7, 17, 15, 0.09);
  }
  .dark-link {
    border-color: var(--ink);
  }
}

/* Version 2: experimental digital campus direction */
:root {
  --ink: #111526;
  --ink-soft: #5d6275;
  --paper: #eef0f6;
  --paper-bright: #f7f8fc;
  --line: rgba(17, 21, 38, 0.15);
  --accent: #3153e8;
  --accent-deep: #2039ab;
  --dark: #111526;
  --dark-soft: #e4e7f1;
  --white: #f8f9fd;
  --header-height: 72px;
}

body {
  background: var(--paper);
}

.site-header {
  height: var(--header-height);
  color: var(--ink);
  border-color: var(--line);
  mix-blend-mode: normal;
}
.site-header.is-scrolled {
  color: var(--ink);
  background: color-mix(in srgb, var(--paper-bright) 90%, transparent);
  border-color: var(--line);
}
.site-header.is-hidden {
  transform: none;
}
.brand {
  gap: 12px;
}
.brand-mark {
  width: 40px;
  height: 40px;
  overflow: visible;
}
.brand-mark .mark-frame {
  fill: var(--ink);
}
.brand-mark .mark-core {
  fill: var(--accent);
}
.brand-mark .mark-link {
  fill: none;
  stroke: var(--paper-bright);
  stroke-width: 1.4;
}
.brand-copy {
  gap: 3px;
}
.brand-copy strong {
  font-size: 13px;
  letter-spacing: 0.01em;
}
.brand-copy small {
  color: var(--ink-soft);
  font-size: 9px;
  letter-spacing: 0.35em;
  opacity: 1;
}
.desktop-nav a {
  font-size: 12px;
  font-weight: 520;
  opacity: 0.62;
}
.desktop-nav a::after {
  background: var(--accent);
}
.search-link {
  color: var(--ink-soft);
}

.hero {
  min-height: 100dvh;
  color: var(--ink);
  background: var(--paper);
}
.hero::before {
  content: "";
  position: absolute;
  width: 56vw;
  aspect-ratio: 1;
  right: -16vw;
  top: -27vw;
  border: 14vw solid color-mix(in srgb, var(--accent) 7%, transparent);
  border-radius: 50%;
  pointer-events: none;
}
.hero-slide {
  clip-path: inset(0 0 0 100%);
}
.hero-slide.is-active {
  clip-path: inset(0);
}
.hero-shade {
  display: none;
}
.hero-grid {
  grid-template-columns: minmax(0, 0.92fr) minmax(420px, 1.08fr);
  align-items: center;
  padding-top: var(--header-height);
}
.hero-content {
  width: min(710px, 48vw);
  padding: 2vh 0 8vh;
}
.hero-eyebrow {
  margin-bottom: 24px;
  color: var(--accent-deep);
  font-size: 10px;
  font-weight: 650;
  letter-spacing: 0.24em;
}
.hero-eyebrow::before {
  content: "";
  width: 28px;
  height: 3px;
  background: var(--accent);
}
.hero-eyebrow span {
  display: none;
}
.hero h1 {
  max-width: 760px;
  color: var(--ink);
  font-size: clamp(50px, 5.1vw, 78px);
  line-height: 1.16;
  letter-spacing: -0.025em;
  font-weight: 580;
}
.hero-summary {
  width: min(500px, 85%);
  margin-top: 28px;
  color: var(--ink-soft);
  font-size: 14px;
  line-height: 1.85;
}
.primary-link {
  gap: 34px;
  margin-top: 34px;
  padding: 0 0 9px;
  border: 0;
  border-bottom: 1px solid var(--ink);
  color: var(--ink);
}
.primary-link i {
  width: 34px;
  height: 34px;
  color: var(--paper-bright);
  background: var(--accent);
}
.primary-link:hover i {
  color: var(--paper-bright);
  background: var(--ink);
}

.hero-media {
  inset: 13% 3vw 13% auto;
  width: min(51vw, 760px);
  height: auto;
  perspective: 920px;
  perspective-origin: 54% 46%;
  pointer-events: none;
}
.hero-media::before {
  content: "";
  position: absolute;
  inset: 10% 7% 12% 18%;
  background: color-mix(in srgb, var(--accent) 10%, transparent);
  transform: translate(22px, 28px) rotate(-4deg);
}
.spatial-scene {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transform: translate3d(var(--scene-x, 0), var(--scene-y, 0), 0)
    rotateX(var(--scene-rx, 3deg)) rotateY(var(--scene-ry, -9deg));
  transition: transform 0.38s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: transform;
}
.scene-world {
  position: absolute;
  inset: 0;
  transform-style: preserve-3d;
  transform-origin: 50% 50%;
  will-change: transform, opacity;
}
.hero-slide.is-active .scene-world {
  animation:
    scene-arrive-next 1.25s cubic-bezier(0.12, 0.82, 0.18, 1) both,
    scene-breathe 7s 1.25s ease-in-out infinite alternate;
}
.hero.is-direction-prev .hero-slide.is-active .scene-world {
  animation-name: scene-arrive-prev, scene-breathe;
}
@keyframes scene-arrive-next {
  0% {
    opacity: 0;
    transform: translate3d(36%, -3%, -380px) rotateX(-9deg) rotateY(-42deg)
      rotateZ(5deg) scale(0.72);
  }
  58% {
    opacity: 1;
    transform: translate3d(-2.5%, 0, 38px) rotateX(2deg) rotateY(4deg)
      rotateZ(-0.8deg) scale(1.02);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0) rotateX(0) rotateY(0) rotateZ(0) scale(1);
  }
}
@keyframes scene-arrive-prev {
  0% {
    opacity: 0;
    transform: translate3d(-36%, 4%, -380px) rotateX(10deg) rotateY(42deg)
      rotateZ(-5deg) scale(0.72);
  }
  58% {
    opacity: 1;
    transform: translate3d(2.5%, 0, 38px) rotateX(-2deg) rotateY(-4deg)
      rotateZ(0.8deg) scale(1.02);
  }
  100% {
    opacity: 1;
    transform: translate3d(0, 0, 0) rotateX(0) rotateY(0) rotateZ(0) scale(1);
  }
}
@keyframes scene-breathe {
  from {
    transform: translate3d(0, -3px, 0) rotateZ(-0.25deg);
  }
  to {
    transform: translate3d(0, 8px, 22px) rotateZ(0.35deg);
  }
}
.scene-aurora {
  position: absolute;
  z-index: -3;
  width: 70%;
  aspect-ratio: 1;
  right: 4%;
  top: 10%;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    color-mix(in srgb, var(--accent) 34%, transparent) 0 8%,
    color-mix(in srgb, #748bff 20%, transparent) 30%,
    transparent 68%
  );
  filter: blur(10px);
  transform: translateZ(-170px) scale(1.28);
  animation: aurora-pulse 3.8s ease-in-out infinite alternate;
}
@keyframes aurora-pulse {
  to {
    opacity: 0.62;
    transform: translateZ(-130px) scale(1.43);
  }
}
.scene-speed-lines {
  position: absolute;
  z-index: -2;
  inset: 2% -8% 0 7%;
  opacity: 0.38;
  background: repeating-linear-gradient(
    104deg,
    transparent 0 34px,
    color-mix(in srgb, var(--accent) 46%, transparent) 35px,
    transparent 36px 70px
  );
  mask-image: radial-gradient(ellipse at 58% 50%, #000 0 34%, transparent 72%);
  transform: translateZ(-120px) rotateZ(-8deg) scale(1.08);
  animation: speed-lines 2.4s linear infinite;
}
@keyframes speed-lines {
  to {
    background-position: 140px 0;
  }
}
.scene-backplane {
  position: absolute;
  inset: 5% 11% 10% 11%;
  border: 1px solid color-mix(in srgb, var(--accent) 30%, transparent);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--accent) 8%, transparent),
    transparent 62%
  );
  transform: translate3d(42px, 32px, -58px) rotateY(-12deg) rotateZ(3deg);
  box-shadow: 0 35px 100px color-mix(in srgb, var(--accent) 13%, transparent);
}
.scene-slab {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--accent) 42%, transparent);
  background: linear-gradient(
    135deg,
    color-mix(in srgb, var(--paper-bright) 72%, transparent),
    color-mix(in srgb, var(--accent) 10%, transparent)
  );
  backdrop-filter: blur(8px);
}
.slab-a {
  width: 28%;
  height: 12%;
  right: -1%;
  top: 27%;
  transform: translateZ(116px) rotateY(-24deg) rotateZ(-8deg);
}
.slab-b {
  width: 20%;
  height: 8%;
  left: 3%;
  bottom: 20%;
  transform: translateZ(142px) rotateY(22deg) rotateZ(7deg);
}
.scene-photo {
  position: absolute;
  top: 50%;
  right: 8%;
  bottom: auto;
  left: 14%;
  aspect-ratio: var(--poster-ratio, 4 / 5);
  overflow: hidden;
  background: var(--dark-soft);
  border: 1px solid color-mix(in srgb, var(--accent) 42%, var(--line));
  box-shadow:
    38px 48px 100px color-mix(in srgb, var(--accent) 18%, transparent),
    0 0 0 1px color-mix(in srgb, white 28%, transparent) inset;
  transform: translateY(-50%) translateZ(54px) rotateY(-10deg) rotateX(3deg);
  transform-style: preserve-3d;
}
.scene-photo.is-landscape {
  right: 0;
  left: 4%;
}
.scene-photo.is-portrait {
  right: 8%;
  left: auto;
  width: auto;
  height: 86%;
}
.scene-photo.is-square {
  right: 3%;
  left: 10%;
}
.hero-slide .hero-media .scene-photo img {
  transition: none;
}
.hero-slide.is-active .hero-media .scene-photo .scene-photo-ambient {
  position: absolute;
  inset: -8%;
  width: 116%;
  height: 116%;
  object-fit: cover;
  filter: blur(28px) saturate(1.25) brightness(0.82);
  opacity: 0.64;
  transform: scale(1.12);
}
.hero-slide.is-active .hero-media .scene-photo .scene-poster {
  position: relative;
  z-index: 2;
  width: 100%;
  height: 100%;
  padding: clamp(10px, 1.2vw, 18px);
  object-fit: contain;
  filter: saturate(0.96) contrast(1.02);
  transform: none;
}
.photo-glass {
  position: absolute;
  z-index: 3;
  inset: 0;
  background: linear-gradient(
    118deg,
    transparent 0 44%,
    rgba(255, 255, 255, 0.2) 48%,
    transparent 54%
  );
  background-size: 250% 100%;
  mix-blend-mode: screen;
  animation: glass-scan 4.8s ease-in-out infinite;
}
@keyframes glass-scan {
  0%,
  45% {
    background-position: 140% 0;
  }
  75%,
  100% {
    background-position: -80% 0;
  }
}
.photo-edge {
  position: absolute;
  z-index: -1;
  inset: 0;
  background: linear-gradient(135deg, var(--accent), #7188ff);
  transform: translate3d(20px, 20px, -24px);
}
.scene-ring {
  position: absolute;
  border: 1px solid color-mix(in srgb, var(--accent) 44%, transparent);
  border-radius: 50%;
  transform-style: preserve-3d;
}
.scene-ring::after {
  content: "";
  position: absolute;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 18px 5px color-mix(in srgb, var(--accent) 55%, transparent);
  offset-path: border-box;
  animation: orbit-dot 3.4s linear infinite;
}
.scene-ring-a {
  width: 82%;
  aspect-ratio: 1;
  left: 1%;
  top: 0;
  transform: translateZ(-50px) rotateX(72deg) rotateZ(18deg);
  animation: ring-a 12s linear infinite;
}
.scene-ring-b {
  width: 60%;
  aspect-ratio: 1;
  right: -4%;
  bottom: -1%;
  transform: translateZ(92px) rotateY(68deg) rotateZ(-15deg);
  border-style: dashed;
  animation: ring-b 10s linear infinite reverse;
}
@keyframes ring-a {
  to {
    transform: translateZ(-50px) rotateX(72deg) rotateZ(378deg);
  }
}
@keyframes ring-b {
  to {
    transform: translateZ(92px) rotateY(68deg) rotateZ(345deg);
  }
}
@keyframes orbit-dot {
  to {
    offset-distance: 100%;
  }
}
.scene-axis {
  position: absolute;
  height: 1px;
  background: color-mix(in srgb, var(--accent) 55%, transparent);
  transform-origin: left;
}
.axis-x {
  width: 92%;
  left: 2%;
  top: 34%;
  transform: translateZ(74px) rotate(-12deg);
}
.axis-y {
  width: 70%;
  left: 32%;
  top: 12%;
  transform: translateZ(-15px) rotate(67deg);
}
.scene-node {
  position: absolute;
  width: 12px;
  height: 12px;
  background: var(--accent);
  box-shadow:
    0 0 0 8px color-mix(in srgb, var(--accent) 15%, transparent),
    0 0 24px color-mix(in srgb, var(--accent) 74%, transparent);
  transform: translateZ(150px);
  animation: node-pop 1.8s ease-in-out infinite alternate;
}
.node-a {
  left: 9%;
  top: 31%;
}
.node-b {
  right: 2%;
  bottom: 23%;
  width: 8px;
  height: 8px;
}
.scene-cube {
  position: absolute;
  width: 54px;
  height: 54px;
  transform-style: preserve-3d;
}
.scene-cube i {
  position: absolute;
  inset: 0;
  border: 1px solid color-mix(in srgb, var(--paper-bright) 65%, var(--accent));
  background: color-mix(in srgb, var(--accent) 72%, transparent);
  backface-visibility: visible;
}
.scene-cube i:nth-child(1) {
  transform: translateZ(27px);
}
.scene-cube i:nth-child(2) {
  transform: rotateY(180deg) translateZ(27px);
}
.scene-cube i:nth-child(3) {
  transform: rotateY(90deg) translateZ(27px);
  background: color-mix(in srgb, var(--accent) 50%, transparent);
}
.scene-cube i:nth-child(4) {
  transform: rotateY(-90deg) translateZ(27px);
  background: color-mix(in srgb, var(--accent) 42%, transparent);
}
.scene-cube i:nth-child(5) {
  transform: rotateX(90deg) translateZ(27px);
  background: color-mix(in srgb, var(--paper-bright) 55%, var(--accent));
}
.scene-cube i:nth-child(6) {
  transform: rotateX(-90deg) translateZ(27px);
}
.cube-a {
  right: 1%;
  top: 10%;
  animation: cube-a 5.5s ease-in-out infinite alternate;
}
.cube-b {
  left: 1%;
  bottom: 8%;
  width: 38px;
  height: 38px;
  animation: cube-b 4.8s ease-in-out infinite alternate;
}
.cube-b i:nth-child(1) {
  transform: translateZ(19px);
}
.cube-b i:nth-child(2) {
  transform: rotateY(180deg) translateZ(19px);
}
.cube-b i:nth-child(3) {
  transform: rotateY(90deg) translateZ(19px);
}
.cube-b i:nth-child(4) {
  transform: rotateY(-90deg) translateZ(19px);
}
.cube-b i:nth-child(5) {
  transform: rotateX(90deg) translateZ(19px);
}
.cube-b i:nth-child(6) {
  transform: rotateX(-90deg) translateZ(19px);
}
@keyframes cube-a {
  from {
    transform: translate3d(0, 0, 140px) rotateX(35deg) rotateY(20deg) rotateZ(0);
  }
  to {
    transform: translate3d(-24px, 26px, 205px) rotateX(145deg) rotateY(150deg)
      rotateZ(24deg);
  }
}
@keyframes cube-b {
  from {
    transform: translate3d(0, 0, 105px) rotateX(20deg) rotateY(55deg);
  }
  to {
    transform: translate3d(24px, -25px, 175px) rotateX(125deg) rotateY(170deg);
  }
}
@keyframes node-pop {
  to {
    transform: translateZ(185px) scale(1.35);
    box-shadow:
      0 0 0 13px color-mix(in srgb, var(--accent) 8%, transparent),
      0 0 34px color-mix(in srgb, var(--accent) 82%, transparent);
  }
}
.scene-beam {
  position: absolute;
  z-index: 5;
  width: 2px;
  height: 76%;
  left: 20%;
  top: 4%;
  background: linear-gradient(
    transparent,
    var(--accent) 40%,
    white 50%,
    var(--accent) 58%,
    transparent
  );
  box-shadow: 0 0 16px var(--accent);
  opacity: 0.7;
  transform: translateZ(122px) rotateZ(57deg) scaleY(0.4);
  animation: beam-sweep 3.2s ease-in-out infinite;
}
@keyframes beam-sweep {
  0%,
  20% {
    opacity: 0;
    transform: translate3d(-90px, 30px, 122px) rotateZ(57deg) scaleY(0.25);
  }
  52% {
    opacity: 0.85;
  }
  80%,
  100% {
    opacity: 0;
    transform: translate3d(420px, -50px, 122px) rotateZ(57deg) scaleY(0.7);
  }
}
.scene-coordinate {
  position: absolute;
  z-index: 6;
  right: 2%;
  bottom: 9%;
  display: grid;
  gap: 6px;
  min-width: 142px;
  padding: 11px 13px;
  color: var(--ink);
  background: color-mix(in srgb, var(--paper-bright) 76%, transparent);
  border: 1px solid color-mix(in srgb, var(--accent) 38%, var(--line));
  backdrop-filter: blur(12px);
  transform: translateZ(176px) rotateY(-7deg);
  box-shadow: 14px 18px 34px rgba(20, 24, 43, 0.13);
}
.scene-coordinate span,
.scene-coordinate small {
  font-size: 8px;
  letter-spacing: 0.18em;
  white-space: nowrap;
}
.scene-coordinate small {
  color: var(--ink-soft);
  font-size: 7px;
}
.scene-coordinate i {
  width: 100%;
  height: 2px;
  overflow: hidden;
  background: color-mix(in srgb, var(--accent) 13%, transparent);
}
.scene-coordinate i::after {
  content: "";
  display: block;
  width: 35%;
  height: 100%;
  background: var(--accent);
  animation: coordinate-scan 2s ease-in-out infinite alternate;
}
@keyframes coordinate-scan {
  to {
    transform: translateX(185%);
  }
}
.hero-side-note,
.scroll-cue {
  display: none;
}
.hero-controls {
  bottom: 28px;
  grid-template-columns: minmax(180px, 420px) auto;
  justify-content: end;
}
.hero-counter {
  display: none;
}
.hero-timeline {
  background: color-mix(in srgb, var(--ink) 16%, transparent);
}
.hero-buttons {
  border-color: var(--line);
}
.hero-buttons button {
  color: var(--ink);
  background: color-mix(in srgb, var(--paper-bright) 65%, transparent);
  border-color: var(--line);
}
.hero-buttons button:hover,
.hero-buttons button:focus-visible {
  color: var(--paper-bright);
  background: var(--accent);
}

.section {
  padding: 118px 0;
}
.section-heading {
  display: block;
  max-width: 760px;
  padding-bottom: 34px;
  border-color: var(--line);
}
.section-heading > div,
.section-number {
  display: none;
}
.section-heading h2 {
  color: var(--ink);
  font-size: clamp(46px, 5vw, 74px);
  font-weight: 580;
}
.section-heading .heading-note {
  max-width: 560px;
  margin-top: 20px;
  color: var(--ink-soft);
  font-size: 14px;
}

.policy {
  background: var(--paper-bright);
}
.policy-layout {
  padding-top: 62px;
}
.policy-image {
  height: clamp(360px, 39vw, 570px);
  overflow: visible;
  transform: perspective(1200px) rotateY(4deg) rotateX(1deg);
  transform-origin: left center;
  transition: transform 0.8s var(--ease);
}
.policy-image::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: 16px -16px -16px 16px;
  background: var(--accent);
}
.policy-image:hover {
  transform: perspective(1200px) rotateY(0) rotateX(0);
}
.policy-image img {
  height: 100%;
  object-fit: cover;
  filter: saturate(0.8);
}
.image-tag {
  display: none;
}
.policy-feature-copy {
  color: var(--ink);
}
.policy-feature-copy .meta,
.policy-feature-copy > p:not(.meta),
.policy-list-head a,
.policy-meta {
  color: var(--ink-soft);
}
.policy-feature-copy .meta span,
.policy-meta span,
.item-arrow {
  color: var(--accent-deep);
}
.text-link {
  border-color: var(--ink);
}
.policy-list-head {
  border-color: var(--ink);
}
.policy-list article {
  border-color: var(--line);
}
.policy-list article:hover {
  padding-left: 10px;
}

.fields {
  color: var(--ink);
  background: var(--paper);
}
.section-heading-light {
  border-color: var(--line);
}
.section-heading-light .heading-note {
  color: var(--ink-soft);
}
.category-tabs {
  border-color: var(--line);
}
.category-tabs button {
  color: color-mix(in srgb, var(--ink) 46%, transparent);
}
.category-tabs button span {
  color: color-mix(in srgb, var(--ink) 28%, transparent);
}
.category-tabs button:hover,
.category-tabs button[aria-selected="true"] {
  color: var(--ink);
}
.category-tabs button[aria-selected="true"] span {
  color: var(--accent);
}
.category-tabs button::after {
  background: var(--accent);
}
.category-panel {
  background: transparent;
  grid-template-columns: minmax(0, 1.05fr) minmax(390px, 0.95fr);
  gap: clamp(42px, 6vw, 90px);
}
.category-visual {
  min-height: 590px;
  overflow: visible;
  transform: perspective(1200px) rotateY(-5deg) rotateX(1deg);
  transform-origin: right center;
}
.category-visual::before {
  content: "";
  position: absolute;
  z-index: -1;
  inset: -18px 18px 18px -18px;
  border: 1px solid color-mix(in srgb, var(--accent) 45%, transparent);
}
.category-visual::after {
  background: linear-gradient(transparent 55%, rgba(12, 18, 40, 0.54));
}
.category-visual img {
  object-fit: cover;
}
.category-copy {
  padding: 36px 0;
}
.category-kicker {
  color: var(--accent-deep);
}
.category-copy h3 {
  color: var(--ink);
}
.category-summary {
  color: var(--ink-soft);
}
.category-copy li {
  border-color: var(--line);
}
.category-copy li a {
  color: var(--ink-soft);
}
.category-copy li a::before {
  color: color-mix(in srgb, var(--ink) 28%, transparent);
}
.category-copy li i {
  color: var(--accent);
}
.outline-link {
  color: var(--ink);
  border-color: var(--line);
}
.outline-link:hover {
  color: var(--paper-bright);
  background: var(--accent);
}

.about {
  background: var(--paper-bright);
}
.about-layout {
  grid-template-columns: 0.48fr 1.42fr 0.7fr;
}
.about-label {
  color: var(--accent-deep);
  font-size: 14px;
  font-weight: 620;
  letter-spacing: 0;
}
.about-lead {
  color: var(--ink) !important;
}
.about-copy > p:not(.about-lead) {
  color: var(--ink-soft);
}
.dark-link {
  border-color: var(--ink);
}
.about-orbit {
  transform-style: preserve-3d;
  transform: perspective(700px) rotateY(-16deg) rotateX(9deg);
}
.orbit {
  border-color: color-mix(in srgb, var(--accent) 42%, transparent);
}
.orbit::before {
  background: var(--accent);
}
.orbit-b::before {
  background: var(--ink);
}

.join-band {
  color: var(--paper-bright);
  background: var(--accent);
}
.join-track {
  color: color-mix(in srgb, var(--paper-bright) 12%, transparent);
  font-size: clamp(70px, 10vw, 145px);
}
.join-content a {
  color: var(--paper-bright);
  background: var(--ink);
}
.join-content a span {
  color: var(--paper-bright);
}

.site-footer {
  color: var(--ink-soft);
  background: var(--paper);
  border-top: 1px solid var(--line);
}
.footer-brand,
.footer-slogan span {
  color: var(--ink);
}
.footer-brand .mark-link {
  stroke: var(--paper);
}
.footer-nav p,
.footer-slogan p,
.footer-bottom {
  color: color-mix(in srgb, var(--ink) 38%, transparent);
}
.footer-nav a:hover {
  color: var(--accent);
}
.footer-bottom {
  border-color: var(--line);
}

@media (max-width: 1100px) {
  .hero-grid {
    grid-template-columns: 0.92fr 1.08fr;
  }
  .hero-content {
    width: 50vw;
  }
  .hero h1 {
    font-size: clamp(46px, 5.4vw, 65px);
  }
  .hero-media {
    right: 1.5vw;
    width: 52vw;
  }
  .participation-link {
    padding-inline: 8px;
  }
  .member-entry span {
    max-width: 112px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }
  .section-heading,
  .section-heading .heading-note {
    grid-column: auto;
  }
  .category-panel {
    grid-template-columns: minmax(0, 1fr) 390px;
    gap: 42px;
  }
}

@media (max-width: 767px) {
  :root {
    --header-height: 66px;
  }
  .site-header {
    height: var(--header-height);
  }
  .brand-mark {
    width: 32px;
    height: 32px;
  }
  .brand-copy strong {
    font-size: 11px;
  }
  .brand-copy small {
    font-size: 8px;
  }
  .menu-toggle {
    color: var(--ink);
  }
  .mobile-menu {
    color: var(--paper-bright);
    background: var(--ink);
  }
  .guest-entry {
    gap: 5px;
    font-size: 11px;
  }
  .guest-entry a:last-child,
  .guest-entry i {
    display: none;
  }
  .member-entry {
    gap: 0;
  }
  .member-entry span {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }
  .participation-link {
    min-height: 32px;
    border: 0;
    background: transparent;
    padding: 0;
  }
  .participation-link b {
    min-width: 20px;
    height: 20px;
  }
  .participation-link span {
    font-size: 0;
  }
  .participation-link span::after {
    content: "活动";
    font-size: 10px;
  }
  .hero {
    min-height: 100dvh;
  }
  .hero::before {
    width: 110vw;
    right: -64vw;
    top: -28vw;
    border-width: 25vw;
  }
  .hero-grid {
    display: block;
    padding-top: 0;
  }
  .hero-content {
    position: relative;
    z-index: 4;
    width: 100%;
    padding: 118px 0 0;
  }
  .hero-eyebrow {
    margin-bottom: 18px;
    font-size: 8px;
  }
  .hero h1 {
    max-width: 350px;
    font-size: clamp(41px, 12.8vw, 52px);
    line-height: 1.08;
  }
  .hero-summary {
    width: 76%;
    margin-top: 20px;
    font-size: 12px;
    line-height: 1.7;
  }
  .primary-link {
    margin-top: 22px;
    font-size: 12px;
  }
  .primary-link i {
    width: 31px;
    height: 31px;
  }
  .hero-media {
    inset: auto 4vw 66px auto;
    width: 92vw;
    height: 48vh;
    opacity: 0.7;
  }
  .hero-media::before {
    inset: 16% 10% 10% 18%;
  }
  .scene-photo {
    box-shadow: 20px 28px 50px
      color-mix(in srgb, var(--accent) 13%, transparent);
  }
  .scene-photo.is-landscape {
    top: 60%;
    right: -2%;
    left: 5%;
  }
  .scene-photo.is-portrait {
    top: 56%;
    right: 4%;
    height: 78%;
  }
  .scene-photo.is-square {
    top: 57%;
    right: 0;
    left: 11%;
  }
  .hero-slide.is-active .hero-media .scene-photo .scene-poster {
    padding: 8px;
    filter: saturate(0.82) contrast(1.04);
  }
  .hero-slide.is-active .hero-media .scene-photo .scene-photo-ambient {
    opacity: 0.52;
  }
  .scene-cube {
    scale: 0.72;
  }
  .scene-speed-lines {
    opacity: 0.24;
  }
  .scene-coordinate {
    right: 3%;
    bottom: 8%;
    scale: 0.82;
    transform-origin: right bottom;
  }
  .hero-controls {
    width: calc(100% - 36px);
    bottom: 20px;
    grid-template-columns: 1fr auto;
  }
  .hero-buttons button {
    width: 38px;
    height: 38px;
  }
  .section {
    padding: 84px 0;
  }
  .section-heading {
    gap: 0;
  }
  .section-heading h2 {
    font-size: 44px;
  }
  .section-heading .heading-note {
    margin-top: 16px;
  }
  .policy-layout {
    gap: 70px;
  }
  .policy-image {
    height: 67vw;
    transform: perspective(900px) rotateY(3deg);
  }
  .policy-image::before {
    inset: 10px -10px -10px 10px;
  }
  .category-panel {
    grid-template-columns: 1fr;
    gap: 26px;
  }
  .category-visual {
    min-height: 68vw;
    transform: perspective(900px) rotateY(-2deg);
  }
  .category-visual::before {
    inset: -9px 9px 9px -9px;
  }
  .category-copy {
    padding: 20px 0 0;
  }
  .category-copy h3 {
    font-size: 32px;
  }
  .about-layout {
    grid-template-columns: 1fr;
  }
  .about-label {
    margin-bottom: -20px;
  }
  .about-lead {
    font-size: 38px !important;
  }
  .join-content p {
    font-size: 31px;
  }
}

@media (prefers-color-scheme: dark) {
  :root {
    --ink: #f1f3fb;
    --ink-soft: #a8adc2;
    --paper: #111421;
    --paper-bright: #171b2b;
    --line: rgba(238, 241, 252, 0.15);
    --accent: #6680f2;
    --accent-deep: #8ca0fa;
    --dark-soft: #252a3c;
    --white: #f1f3fb;
  }
  .site-header.is-scrolled {
    background: color-mix(in srgb, var(--paper) 90%, transparent);
  }
  .brand-mark .mark-link {
    stroke: var(--paper);
  }
  .footer-brand .mark-link {
    stroke: var(--paper);
  }
  .scene-photo img,
  .policy-image img,
  .category-visual img {
    filter: saturate(0.72) brightness(0.84) contrast(1.05);
  }
}

:root[data-theme="dark"] {
  --ink: #f1f3fb;
  --ink-soft: #a8adc2;
  --paper: #111421;
  --paper-bright: #171b2b;
  --line: rgba(238, 241, 252, 0.15);
  --accent: #6680f2;
  --accent-deep: #8ca0fa;
  --dark-soft: #252a3c;
  --white: #f1f3fb;
}
:root[data-theme="dark"] .site-header.is-scrolled {
  background: color-mix(in srgb, var(--paper) 90%, transparent);
}
:root[data-theme="dark"] .brand-mark .mark-link,
:root[data-theme="dark"] .footer-brand .mark-link {
  stroke: var(--paper);
}
:root[data-theme="dark"] .scene-photo img,
:root[data-theme="dark"] .policy-image img,
:root[data-theme="dark"] .category-visual img {
  filter: saturate(0.72) brightness(0.84) contrast(1.05);
}

@media (prefers-reduced-motion: reduce) {
  .spatial-scene {
    transform: rotateX(2deg) rotateY(-7deg);
  }
  .hero-slide.is-active .scene-world {
    animation: none !important;
  }
  .scene-cube,
  .scene-ring,
  .scene-ring::after,
  .scene-aurora,
  .scene-speed-lines,
  .photo-glass,
  .scene-beam,
  .scene-node,
  .scene-coordinate i::after {
    animation: none !important;
  }
}