:root {
      --ink: #111318;
      --paper: #ffffff;
      --white: #ffffff;
      --surface: #f5f6f8;
      --brand-blue: #284bff;
      --business-green: #2e775b;
      --institution-blue: color-mix(in oklch, var(--brand-blue) 70%, var(--ink));
      --muted: #626873;
      --line: #dde1e7;
      --dark-line: #343946;
      --ink-82: color-mix(in srgb, var(--ink) 82%, var(--paper));
      --paper-on-ink-72: color-mix(in srgb, var(--paper) 72%, var(--ink));
      --paper-on-ink-48: color-mix(in srgb, var(--paper) 48%, var(--ink));
      --paper-on-ink-88: color-mix(in srgb, var(--paper) 88%, var(--ink));
      --paper-on-ink-64: color-mix(in srgb, var(--paper) 64%, var(--ink));
      --institution-on-ink: color-mix(in srgb, var(--institution-blue) 34%, var(--white));
      --container: 1280px;
      --page-pad: 32px;
      --header-h: 72px;
      --grid-gap: 24px;
      --section-space: 112px;
      --ease: cubic-bezier(.22, .61, .36, 1);
    }

    * {
      box-sizing: border-box;
    }

    html {
      scroll-behavior: smooth;
      scroll-padding-top: calc(var(--header-h) + 16px);
      background: var(--paper);
    }

    body {
      margin: 0;
      color: var(--ink);
      background: var(--paper);
      font-family: "IBM Plex Sans", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      font-size: 16px;
      line-height: 1.55;
      letter-spacing: 0;
      -webkit-font-smoothing: antialiased;
    }

    body.nav-open {
      overflow: hidden;
    }

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

    button {
      color: inherit;
      font: inherit;
    }

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

    h1,
    h2,
    h3,
    p {
      margin: 0;
      text-wrap: pretty;
    }

    h1,
    h2,
    h3 {
      font-family: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
      letter-spacing: 0;
    }

    button,
    a {
      -webkit-tap-highlight-color: transparent;
    }

    :focus-visible {
      outline: 2px solid var(--brand-blue);
      outline-offset: 4px;
    }

    .container {
      width: min(calc(100% - (var(--page-pad) * 2)), var(--container));
      margin-inline: auto;
    }

    .mono {
      font-family: "IBM Plex Mono", monospace;
      letter-spacing: 0;
    }

    .site-header {
      position: sticky;
      z-index: 50;
      top: 0;
      height: var(--header-h);
      border-bottom: 1px solid var(--line);
      background: color-mix(in srgb, var(--paper) 94%, transparent);
      backdrop-filter: blur(14px);
    }

    .header-inner {
      display: grid;
      grid-template-columns: 4fr 8fr;
      gap: var(--grid-gap);
      align-items: center;
      height: 100%;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      justify-self: start;
      gap: 16px;
      min-height: 44px;
      font-family: "Noto Sans SC", sans-serif;
      font-size: 17px;
      font-weight: 700;
    }

    .brand-logo {
      width: 28px;
      height: 30px;
      flex: 0 0 auto;
      object-fit: contain;
    }

    .brand-name {
      white-space: nowrap;
    }

    .brand-meta {
      padding-left: 16px;
      border-left: 1px solid var(--line);
      color: var(--muted);
      font-size: 10px;
      font-weight: 500;
      line-height: 1.2;
      text-transform: uppercase;
    }

    .desktop-nav {
      display: flex;
      align-items: center;
      justify-self: end;
      gap: 36px;
    }

    .desktop-nav a {
      position: relative;
      display: inline-flex;
      align-items: center;
      min-height: 44px;
      color: var(--muted);
      font-size: 14px;
      transition: color 180ms var(--ease);
    }

    .desktop-nav a::after {
      position: absolute;
      right: 0;
      bottom: 7px;
      left: 0;
      height: 1px;
      background: var(--ink);
      content: "";
      transform: scaleX(0);
      transform-origin: right;
      transition: transform 180ms var(--ease);
    }

    .desktop-nav a:hover,
    .desktop-nav a[aria-current="true"] {
      color: var(--ink);
    }

    .desktop-nav a:hover::after,
    .desktop-nav a[aria-current="true"]::after {
      transform: scaleX(1);
      transform-origin: left;
    }

    .menu-button {
      display: none;
      width: 44px;
      height: 44px;
      align-items: center;
      justify-content: center;
      justify-self: end;
      border: 0;
      background: transparent;
      cursor: pointer;
    }

    .mobile-nav {
      display: none;
    }

    .hero {
      min-height: auto;
      padding: 32px 0 16px;
      border-bottom: 1px solid var(--line);
    }

    .hero-grid {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: var(--grid-gap);
      align-items: center;
    }

    .hero-copy {
      grid-column: 1 / span 5;
      align-self: stretch;
      display: flex;
      flex-direction: column;
      justify-content: center;
      padding: 0;
    }

    .hero-kicker {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 24px;
      color: var(--brand-blue);
      font-size: 11px;
      font-weight: 500;
      text-transform: uppercase;
    }

    .hero-kicker::before {
      width: 32px;
      height: 1px;
      background: currentColor;
      content: "";
    }

    .hero h1 {
      max-width: 680px;
      font-size: 72px;
      font-weight: 600;
      line-height: 1.08;
    }

    .hero h1 span {
      color: var(--brand-blue);
    }

    .hero-lead {
      max-width: 500px;
      margin-top: 28px;
      color: var(--ink-82);
      font-size: 18px;
      line-height: 1.65;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 24px;
      margin-top: 32px;
    }

    .text-link {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      min-height: 44px;
      border-bottom: 1px solid currentColor;
      font-size: 14px;
      font-weight: 500;
      transition: gap 180ms var(--ease), color 180ms var(--ease);
    }

    .text-link.secondary {
      color: var(--muted);
    }

    .text-link:hover {
      gap: 14px;
      color: var(--brand-blue);
    }

    .text-link svg,
    .menu-button svg {
      width: 18px;
      height: 18px;
      stroke-width: 1.75;
    }

    .hero-visual {
      grid-column: 6 / -1;
      min-width: 0;
      border: 1px solid var(--line);
      border-radius: 4px;
      background: var(--white);
      overflow: hidden;
    }

    .visual-toolbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 24px;
      min-height: 48px;
      padding: 0 16px 0 20px;
      border-bottom: 1px solid var(--line);
    }

    .visual-title {
      color: var(--muted);
      font-size: 11px;
      white-space: nowrap;
    }

    .interface-tabs {
      display: inline-flex;
      gap: 4px;
      padding: 4px;
      border: 1px solid var(--line);
      border-radius: 999px;
      background: var(--paper);
    }

    .interface-tab {
      min-height: 34px;
      padding: 0 14px;
      border: 0;
      border-radius: 999px;
      color: var(--muted);
      background: transparent;
      font-size: 12px;
      cursor: pointer;
      transition: color 180ms var(--ease), background 180ms var(--ease);
    }

    .interface-tab:hover {
      color: var(--ink);
    }

    .interface-tab[aria-selected="true"] {
      color: var(--white);
      background: var(--ink);
    }

    .interface-stage {
      position: relative;
      aspect-ratio: 2.2 / 1;
      background: var(--surface);
      overflow: hidden;
    }

    .interface-panel {
      position: absolute;
      inset: 0;
      opacity: 0;
      transform: translateY(8px);
      transition: opacity 240ms var(--ease), transform 240ms var(--ease);
      pointer-events: none;
    }

    .interface-panel.is-active {
      opacity: 1;
      transform: translateY(0);
      pointer-events: auto;
    }

    .interface-panel img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .transaction-trace {
      grid-column: 1 / -1;
      display: grid;
      grid-template-columns: 1fr 1fr 1fr 1.15fr 1fr 1.25fr;
      margin-top: 20px;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .trace-step {
      position: relative;
      min-height: 80px;
      padding: 16px 16px 14px;
      border-right: 1px solid var(--line);
    }

    .trace-step:last-child {
      border-right: 0;
    }

    .trace-step::before {
      position: absolute;
      top: -3px;
      left: 0;
      width: 5px;
      height: 5px;
      border-radius: 50%;
      background: var(--ink);
      content: "";
      transform: translateX(-50%);
    }

    .trace-step:first-child::before {
      left: 2px;
      transform: none;
    }

    .trace-step.platform::before {
      background: var(--brand-blue);
    }

    .trace-step.institution::before,
    .trace-step.result::before {
      background: var(--institution-blue);
    }

    .trace-index {
      display: block;
      margin-bottom: 7px;
      color: var(--muted);
      font-size: 10px;
    }

    .trace-label {
      display: block;
      font-size: 13px;
      font-weight: 500;
      white-space: nowrap;
    }

    .trace-pulse {
      position: absolute;
      top: -5px;
      left: 0;
      z-index: 2;
      width: 9px;
      height: 9px;
      border: 2px solid var(--paper);
      border-radius: 50%;
      background: var(--business-green);
      animation: trace-run 4.2s var(--ease) infinite;
    }

    @keyframes trace-run {
      0%, 10% { left: 0; background: var(--business-green); }
      54% { left: 54%; background: var(--brand-blue); }
      78%, 92% { left: calc(100% - 9px); background: var(--institution-blue); }
      100% { left: calc(100% - 9px); background: var(--institution-blue); }
    }

    .section {
      padding: var(--section-space) 0;
      border-bottom: 1px solid var(--line);
    }

    .section-heading {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: var(--grid-gap);
      margin-bottom: 64px;
    }

    .section-heading h2 {
      grid-column: 1 / span 7;
      max-width: 840px;
      font-size: 48px;
      font-weight: 600;
      line-height: 1.16;
    }

    .section-heading p {
      grid-column: 9 / -1;
      align-self: end;
      color: var(--muted);
      font-size: 17px;
      line-height: 1.65;
      max-width: 380px;
    }

    .applications {
      background: var(--white);
      padding-top: 56px;
    }

    .application-row {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: var(--grid-gap);
      align-items: start;
      padding: 48px 0 64px;
      border-top: 1px solid var(--line);
    }

    .application-row:last-child {
      padding-bottom: 0;
    }

    .application-number {
      grid-column: 1 / span 1;
      color: var(--business-green);
      font-size: 12px;
    }

    .application-copy {
      grid-column: 2 / span 4;
      padding-right: 24px;
    }

    .application-copy h3 {
      max-width: 360px;
      font-size: 32px;
      font-weight: 600;
      line-height: 1.25;
    }

    .application-summary {
      margin-top: 24px;
      color: var(--ink);
      font-size: 18px;
      line-height: 1.65;
    }

    .application-detail {
      margin-top: 12px;
      color: var(--muted);
      font-size: 15px;
      line-height: 1.7;
    }

    .application-media {
      grid-column: 6 / -1;
      display: grid;
      grid-template-columns: 1.1fr .9fr;
      gap: 16px;
      min-width: 0;
      aspect-ratio: 2 / 1;
    }

    .scene-image,
    .product-image {
      width: 100%;
      border-radius: 4px;
      object-fit: cover;
    }

    .scene-image {
      height: 100%;
    }

    .product-crop {
      min-width: 0;
      height: 100%;
      border: 1px solid var(--line);
      border-radius: 4px;
      background: var(--surface);
      overflow: hidden;
    }

    .product-crop img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      object-position: left center;
    }

    .architecture {
      background: var(--paper);
    }

    .architecture-intro {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: var(--grid-gap);
      align-items: end;
      margin-bottom: 64px;
    }

    .architecture-intro h2 {
      grid-column: 1 / span 7;
      font-size: 48px;
      font-weight: 600;
      line-height: 1.16;
    }

    .architecture-intro p {
      grid-column: 9 / -1;
      color: var(--muted);
      font-size: 17px;
      line-height: 1.65;
      max-width: 380px;
    }

    .architecture-chain {
      position: relative;
      display: grid;
      grid-template-columns: 1fr 1.15fr 1fr;
      border-top: 1px solid var(--ink);
      border-bottom: 1px solid var(--ink);
    }

    .chain-block {
      position: relative;
      display: flex;
      min-height: 320px;
      flex-direction: column;
      padding: 36px 32px 32px;
      border-right: 1px solid var(--line);
    }

    .chain-block:last-child {
      border-right: 0;
    }

    .chain-block.platform {
      color: var(--white);
      background: var(--brand-blue);
    }

    .chain-block.institution {
      color: var(--white);
      background: var(--institution-blue);
    }

    .chain-meta {
      display: flex;
      justify-content: space-between;
      gap: 16px;
      margin-bottom: 44px;
      color: currentColor;
      font-size: 11px;
      opacity: .72;
    }

    .chain-block h3 {
      font-size: 30px;
      font-weight: 600;
      line-height: 1.25;
    }

    .chain-block > p {
      max-width: 310px;
      margin-top: 18px;
      color: currentColor;
      font-size: 15px;
      line-height: 1.7;
      opacity: .78;
    }

    .chain-list {
      display: flex;
      flex-wrap: wrap;
      gap: 8px 16px;
      margin-top: auto;
      padding: 32px 0 0;
      list-style: none;
      font-size: 12px;
    }

    .chain-list li {
      padding-bottom: 4px;
      border-bottom: 1px solid currentColor;
      opacity: .86;
    }

    .chain-marker {
      position: absolute;
      top: -7px;
      left: 0;
      z-index: 3;
      width: 13px;
      height: 13px;
      border: 3px solid var(--paper);
      border-radius: 50%;
      background: var(--business-green);
      animation: chain-run 5s var(--ease) infinite;
    }

    @keyframes chain-run {
      0%, 8% { left: 0; background: var(--business-green); }
      50% { left: 50%; background: var(--brand-blue); }
      82%, 94% { left: calc(100% - 13px); background: var(--institution-blue); }
      100% { left: calc(100% - 13px); background: var(--institution-blue); }
    }

    .capabilities {
      background: var(--white);
    }

    .capability-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      border-top: 1px solid var(--ink);
    }

    .capability-item {
      display: flex;
      min-height: 232px;
      flex-direction: column;
      padding: 32px 40px 32px 0;
      border-right: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .capability-item:nth-child(even) {
      padding-right: 0;
      padding-left: 40px;
      border-right: 0;
    }

    .capability-head {
      display: flex;
      align-items: baseline;
      justify-content: space-between;
      gap: 24px;
    }

    .capability-head span {
      color: var(--muted);
      font-size: 11px;
    }

    .capability-item h3 {
      font-size: 28px;
      font-weight: 600;
    }

    .capability-item p {
      max-width: 470px;
      margin-top: auto;
      padding-top: 48px;
      color: var(--muted);
      font-size: 16px;
      line-height: 1.6;
    }

    .institutions {
      color: var(--white);
      background: var(--ink);
      border-bottom-color: var(--dark-line);
    }

    .institutions-layout {
      display: grid;
      grid-template-columns: repeat(12, minmax(0, 1fr));
      gap: var(--grid-gap);
    }

    .institutions-copy {
      grid-column: 1 / span 6;
    }

    .institutions-copy h2 {
      max-width: 700px;
      font-size: 48px;
      font-weight: 600;
      line-height: 1.16;
    }

    .institutions-copy > p {
      max-width: 600px;
      margin-top: 28px;
      color: var(--paper-on-ink-72);
      font-size: 18px;
      line-height: 1.7;
    }

    .responsibility {
      grid-column: 8 / -1;
      border-top: 1px solid var(--paper-on-ink-48);
    }

    .responsibility-row {
      display: grid;
      grid-template-columns: 128px 1fr;
      gap: var(--grid-gap);
      padding: 24px 0;
      border-bottom: 1px solid var(--dark-line);
    }

    .responsibility-row dt {
      color: var(--paper-on-ink-48);
      font-size: 12px;
    }

    .responsibility-row dd {
      margin: 0;
      color: var(--paper-on-ink-88);
      font-size: 15px;
      line-height: 1.7;
    }

    .responsibility-row:last-child dd {
      color: var(--institution-on-ink);
    }

    .site-footer {
      padding: 32px 0;
      color: var(--paper-on-ink-64);
      background: var(--ink);
    }

    .footer-inner {
      display: grid;
      grid-template-columns: auto minmax(240px, 1fr) auto;
      gap: 48px;
      align-items: center;
    }

    .footer-brand {
      display: inline-flex;
      gap: 12px;
      align-items: center;
      justify-self: start;
      color: var(--white);
      font-family: "Noto Sans SC", sans-serif;
      font-size: 18px;
      font-weight: 700;
      white-space: nowrap;
    }

    .footer-logo {
      width: 28px;
      height: 30px;
      object-fit: contain;
    }

    .footer-note {
      margin: 0;
      justify-self: center;
      font-size: 12px;
      line-height: 1.65;
      white-space: nowrap;
    }

    .footer-meta {
      display: flex;
      align-items: center;
      justify-self: end;
      font-size: 11px;
      white-space: nowrap;
    }

    .footer-email,
    .footer-icp {
      color: var(--paper-on-ink-64);
      text-decoration-color: var(--dark-line);
      text-underline-offset: 4px;
    }

    .footer-email:hover,
    .footer-icp:hover {
      color: var(--white);
      text-decoration-color: currentColor;
    }

    .footer-meta > * {
      margin: 0;
    }

    .footer-meta > * + * {
      margin-left: 18px;
      padding-left: 18px;
      border-left: 1px solid var(--dark-line);
    }

    .footer-copy {
      white-space: nowrap;
    }

    .footer-icp {
      white-space: nowrap;
    }