:root {
      --graphite: #070A0B;
      --ice: #EAF7F7;
      --ion: #20D9E8;
      --bio: #A6FF4D;
      --muted: rgba(234, 247, 247, .58);
      --line: rgba(234, 247, 247, .16);
      --load: 0%;
    }

    * { box-sizing: border-box; }

    html, body {
      width: 100%;
      height: 100%;
      margin: 0;
      overflow: hidden;
      background: var(--graphite);
      color: var(--ice);
      font-family: "Space Grotesk", "Source Han Sans SC", "Noto Sans CJK SC", "Microsoft YaHei", sans-serif;
      overscroll-behavior: none;
    }

    button { font: inherit; }

    #stage,
    #frame-canvas,
    #forest-field,
    #vignette {
      position: fixed;
      inset: 0;
    }

    #blackout {
      position: fixed;
      inset: 0;
      z-index: 4;
      pointer-events: none;
      opacity: 0;
      background: var(--graphite);
      transition: opacity .24s cubic-bezier(.65, 0, .35, 1);
    }

    #blackout.is-active { opacity: 1; }

    #stage { background: var(--graphite); isolation: isolate; }
    #frame-canvas { width: 100%; height: 100%; z-index: 1; }

    #forest-field {
      z-index: 2;
      pointer-events: none;
      opacity: .24;
      background:
        radial-gradient(circle at 74% 38%, rgba(166, 255, 77, .16), transparent 22%),
        radial-gradient(circle at 27% 62%, rgba(32, 217, 232, .14), transparent 28%),
        linear-gradient(112deg, transparent 42%, rgba(32, 217, 232, .06) 50%, transparent 58%);
      mix-blend-mode: screen;
    }

    #forest-field::before,
    #forest-field::after {
      content: "";
      position: absolute;
      inset: -20%;
      background-image:
        linear-gradient(90deg, transparent 49.7%, rgba(32, 217, 232, .11) 50%, transparent 50.3%),
        linear-gradient(0deg, transparent 49.7%, rgba(166, 255, 77, .08) 50%, transparent 50.3%);
      background-size: 88px 88px;
      mask-image: radial-gradient(circle at center, #000 0, transparent 66%);
      transform: perspective(720px) rotateX(62deg) translateY(44%);
      animation: fieldDrift 12s linear infinite;
    }

    #forest-field::after {
      opacity: .42;
      transform: perspective(620px) rotateX(62deg) translateY(52%) scale(.72);
      animation-direction: reverse;
      animation-duration: 18s;
    }

    @keyframes fieldDrift { to { background-position: 0 88px, 88px 0; } }

    #vignette {
      z-index: 3;
      pointer-events: none;
      background:
        linear-gradient(90deg, rgba(7, 10, 11, .78) 0%, transparent 28%, transparent 70%, rgba(7, 10, 11, .58) 100%),
        linear-gradient(0deg, rgba(7, 10, 11, .78) 0%, transparent 30%, rgba(7, 10, 11, .24) 100%);
    }

    .hud {
      position: fixed;
      inset: 0;
      z-index: 8;
      pointer-events: none;
    }

    .brand {
      position: absolute;
      top: clamp(24px, 4vw, 52px);
      left: clamp(22px, 4vw, 64px);
      display: flex;
      align-items: center;
      gap: 13px;
      letter-spacing: .18em;
      font-size: 11px;
      font-weight: 650;
      text-transform: uppercase;
    }

    .brand-mark {
      width: 17px;
      height: 17px;
      position: relative;
      border: 1px solid rgba(234, 247, 247, .55);
      transform: rotate(45deg);
    }

    .brand-mark::before,
    .brand-mark::after {
      content: "";
      position: absolute;
      background: var(--ion);
      box-shadow: 0 0 12px var(--ion);
    }

    .brand-mark::before { width: 1px; height: 25px; left: 7px; top: -5px; }
    .brand-mark::after { height: 1px; width: 25px; left: -5px; top: 7px; background: var(--bio); }

    .group-tag {
      position: absolute;
      top: clamp(25px, 4vw, 53px);
      right: clamp(22px, 4vw, 64px);
      color: var(--muted);
      font: 500 10px/1.2 "Space Grotesk", sans-serif;
      letter-spacing: .22em;
    }

    .caption {
      position: absolute;
      inset: 0;
      opacity: 0;
      transition: opacity .55s ease;
    }

    .caption.visible { opacity: 1; }

    .caption-left {
      position: absolute;
      left: clamp(24px, 5vw, 80px);
      bottom: clamp(78px, 11vh, 132px);
      width: min(620px, 54vw);
    }

    .eyebrow {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
      color: var(--ion);
      font-size: 10px;
      font-weight: 650;
      letter-spacing: .28em;
      text-transform: uppercase;
    }

    .eyebrow::before {
      content: "";
      width: 34px;
      height: 1px;
      background: currentColor;
      box-shadow: 0 0 9px currentColor;
    }

    #title-en {
      max-width: 780px;
      margin: 0;
      font-size: clamp(42px, 6.7vw, 104px);
      font-weight: 650;
      line-height: .86;
      letter-spacing: -.065em;
      text-transform: uppercase;
      text-wrap: balance;
      text-shadow: 0 10px 36px rgba(0, 0, 0, .46);
    }

    .caption-right {
      position: absolute;
      right: clamp(24px, 5vw, 80px);
      bottom: clamp(80px, 12vh, 146px);
      width: min(340px, 27vw);
      padding: 18px 0 0 24px;
      border-top: 1px solid rgba(166, 255, 77, .6);
      border-left: 1px solid rgba(234, 247, 247, .14);
      backdrop-filter: blur(2px);
    }

    #body-zh {
      margin: 0 0 20px;
      color: rgba(234, 247, 247, .74);
      font-size: clamp(12px, 1.05vw, 15px);
      line-height: 1.8;
      letter-spacing: .07em;
    }

    #spec-label {
      color: var(--bio);
      font: 600 10px/1.4 "Space Grotesk", sans-serif;
      letter-spacing: .2em;
      text-transform: uppercase;
      text-shadow: 0 0 12px rgba(166, 255, 77, .4);
    }

    .stage-specs {
      display: grid;
      grid-template-columns: repeat(2, minmax(0, 1fr));
      gap: 12px;
      margin: 18px 0 16px;
    }

    .stage-spec {
      padding-top: 10px;
      border-top: 1px solid rgba(234, 247, 247, .17);
    }

    .stage-spec b,
    .stage-spec span { display: block; }

    .stage-spec b {
      color: var(--ice);
      font-size: clamp(16px, 1.5vw, 22px);
      font-weight: 560;
      letter-spacing: -.025em;
    }

    .stage-spec span {
      margin-top: 4px;
      color: rgba(234, 247, 247, .46);
      font-size: 8px;
      letter-spacing: .16em;
      text-transform: uppercase;
    }

    .status-row {
      position: absolute;
      left: clamp(24px, 5vw, 80px);
      right: clamp(24px, 5vw, 80px);
      bottom: 28px;
      display: flex;
      justify-content: space-between;
      align-items: flex-end;
      color: rgba(234, 247, 247, .42);
      font-size: 9px;
      letter-spacing: .18em;
      text-transform: uppercase;
    }

    .status-pulse {
      display: inline-block;
      width: 6px;
      height: 6px;
      margin-right: 9px;
      border-radius: 50%;
      background: var(--bio);
      box-shadow: 0 0 12px var(--bio);
      animation: pulse 1.8s ease-in-out infinite;
    }

    @keyframes pulse { 50% { opacity: .35; transform: scale(.72); } }

    .progress {
      position: absolute;
      top: 50%;
      right: clamp(18px, 2.2vw, 38px);
      transform: translateY(-50%);
      display: grid;
      gap: 17px;
      pointer-events: auto;
    }

    .progress::before {
      content: "";
      position: absolute;
      top: 7px;
      bottom: 7px;
      left: 50%;
      width: 1px;
      background: rgba(234, 247, 247, .14);
    }

    .progress button {
      position: relative;
      z-index: 1;
      width: 13px;
      height: 13px;
      padding: 0;
      border: 1px solid rgba(234, 247, 247, .35);
      border-radius: 50%;
      background: var(--graphite);
      cursor: pointer;
      transition: transform .25s ease, background .25s ease, box-shadow .25s ease;
    }

    .progress button.active,
    .progress button:hover {
      background: var(--bio);
      border-color: var(--bio);
      box-shadow: 0 0 14px rgba(166, 255, 77, .75);
      transform: scale(1.18);
    }

    .progress button::after {
      content: attr(data-label);
      position: absolute;
      top: 50%;
      right: 24px;
      width: max-content;
      opacity: 0;
      color: rgba(234, 247, 247, .72);
      font-size: 8px;
      letter-spacing: .16em;
      text-transform: uppercase;
      transform: translate(6px, -50%);
      transition: opacity .2s ease, transform .2s ease;
      pointer-events: none;
    }

    .progress button:hover::after,
    .progress button:focus-visible::after {
      opacity: 1;
      transform: translate(0, -50%);
    }

    .interaction-cta {
      position: absolute;
      right: clamp(24px, 5vw, 80px);
      bottom: clamp(300px, 36vh, 410px);
      z-index: 9;
      display: flex;
      align-items: center;
      gap: 15px;
      min-width: 212px;
      padding: 13px 16px;
      border: 1px solid rgba(234, 247, 247, .24);
      background: rgba(7, 10, 11, .52);
      color: var(--ice);
      text-align: left;
      letter-spacing: .14em;
      text-transform: uppercase;
      backdrop-filter: blur(14px);
      cursor: pointer;
      pointer-events: auto;
      opacity: 0;
      visibility: hidden;
      transform: translateY(12px);
      transition:
        opacity .45s ease,
        visibility 0s linear .45s,
        transform .55s cubic-bezier(.16, 1, .3, 1),
        border-color .3s ease,
        background .3s ease;
    }

    .interaction-cta.is-visible {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
      transition-delay: 0s;
    }

    .interaction-cta.is-suspended {
      opacity: 0 !important;
      visibility: hidden !important;
      pointer-events: none !important;
      transition: none !important;
    }

    .interaction-cta:hover {
      border-color: var(--bio);
      background: rgba(166, 255, 77, .10);
    }

    .interaction-cta__index {
      color: var(--bio);
      font: 650 10px/1 "Space Grotesk", sans-serif;
      text-shadow: 0 0 11px rgba(166,255,77,.65);
    }

    .interaction-cta__copy {
      display: grid;
      gap: 4px;
      font-size: 9px;
    }

    .interaction-cta__copy strong { font-size: 10px; font-weight: 600; }
    .interaction-cta__copy span { color: rgba(234,247,247,.46); font-size: 8px; }

    .interaction-cta__arrow {
      margin-left: auto;
      color: var(--ion);
      font-size: 17px;
      transition: transform .4s cubic-bezier(.16, 1, .3, 1);
    }

    .interaction-cta:hover .interaction-cta__arrow { transform: translateX(5px); }

    .feature {
      position: fixed;
      inset: 0;
      z-index: 18;
      visibility: hidden;
      pointer-events: none;
      transition: visibility 0s linear .55s;
    }

    .feature.is-open {
      visibility: visible;
      pointer-events: auto;
      transition-delay: 0s;
    }

    .feature__backdrop {
      position: absolute;
      inset: 0;
      border: 0;
      background:
        linear-gradient(90deg, rgba(7,10,11,.08), rgba(7,10,11,.62) 60%, rgba(7,10,11,.86));
      opacity: 0;
      cursor: pointer;
      transition: opacity .45s ease;
    }

    .feature.is-open .feature__backdrop { opacity: 1; }

    .feature__panel {
      position: absolute;
      top: 0;
      right: 0;
      width: min(520px, 43vw);
      height: 100%;
      padding: clamp(32px, 5vw, 72px);
      display: flex;
      flex-direction: column;
      background:
        linear-gradient(145deg, rgba(16,24,25,.96), rgba(6,9,10,.97)),
        var(--graphite);
      border-left: 1px solid rgba(32,217,232,.22);
      box-shadow: -40px 0 90px rgba(0,0,0,.38);
      transform: translateX(102%);
      transition: transform .68s cubic-bezier(.16, 1, .3, 1);
      overflow-x: hidden;
      overflow-y: auto;
      scrollbar-width: none;
    }

    .feature__panel::-webkit-scrollbar { display: none; }

    .feature.is-open .feature__panel { transform: translateX(0); }

    .feature__close {
      align-self: flex-end;
      padding: 0 0 9px;
      border: 0;
      border-bottom: 1px solid rgba(234,247,247,.24);
      background: transparent;
      color: var(--muted);
      font-size: 9px;
      letter-spacing: .22em;
      cursor: pointer;
      transition: color .25s ease, border-color .25s ease;
    }

    .feature__close:hover { color: var(--bio); border-color: var(--bio); }

    .feature__eyebrow {
      margin-top: clamp(38px, 8vh, 92px);
      color: var(--ion);
      font: 600 9px/1.3 "Space Grotesk", sans-serif;
      letter-spacing: .26em;
      text-transform: uppercase;
    }

    .feature__title {
      margin: 12px 0 0;
      font-size: clamp(38px, 4.5vw, 68px);
      line-height: .92;
      letter-spacing: -.055em;
      text-transform: uppercase;
    }

    .feature__cn {
      max-width: 34em;
      margin: 18px 0 0;
      color: rgba(234,247,247,.62);
      font-size: 12px;
      line-height: 1.8;
      letter-spacing: .06em;
    }

    .feature__viz {
      position: relative;
      min-height: 220px;
      margin: 34px 0 28px;
      border: 1px solid rgba(234,247,247,.11);
      overflow: hidden;
      background:
        linear-gradient(rgba(32,217,232,.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(32,217,232,.035) 1px, transparent 1px),
        rgba(0,0,0,.16);
      background-size: 28px 28px;
    }

    .feature__viz::after {
      content: "";
      position: absolute;
      inset: 0;
      pointer-events: none;
      background: radial-gradient(circle at 50% 50%, transparent, rgba(7,10,11,.54));
    }

    .viz-scan,
    .viz-matrix,
    .viz-flow,
    .viz-core,
    .viz-online { position: absolute; inset: 0; display: none; }

    .feature[data-fx="scan"] .viz-scan,
    .feature[data-fx="matrix"] .viz-matrix,
    .feature[data-fx="flow"] .viz-flow,
    .feature[data-fx="core"] .viz-core,
    .feature[data-fx="online"] .viz-online { display: block; }

    .viz-scan::before {
      content: "";
      position: absolute;
      top: 0;
      bottom: 0;
      width: 2px;
      background: var(--ion);
      box-shadow: 0 0 24px 8px rgba(32,217,232,.22);
      animation: scan 2.8s ease-in-out infinite alternate;
    }

    .viz-scan::after {
      content: "BLACK TITANIUM / EDGE FRAME / ENERGY HINGE";
      position: absolute;
      left: 20px;
      bottom: 18px;
      color: var(--bio);
      font-size: 8px;
      letter-spacing: .18em;
    }

    @keyframes scan { from { left: 8%; } to { left: 91%; } }

    .viz-matrix {
      padding: 45px 28px;
      grid-template-columns: repeat(9, 1fr);
      gap: 8px;
    }

    .feature[data-fx="matrix"] .viz-matrix { display: grid; }

    .viz-matrix i {
      border: 1px solid rgba(234,247,247,.16);
      background: rgba(32,217,232,.06);
      animation: keyPulse 2.4s ease-in-out infinite;
      animation-delay: calc(var(--i) * -70ms);
    }

    @keyframes keyPulse {
      0%, 68%, 100% { background: rgba(32,217,232,.05); box-shadow: none; }
      78% { background: var(--bio); box-shadow: 0 0 16px rgba(166,255,77,.6); }
    }

    .viz-flow i {
      position: absolute;
      left: -20%;
      width: 140%;
      height: 52px;
      border-top: 1px solid rgba(32,217,232,.55);
      border-radius: 50%;
      transform: rotate(calc(-8deg + var(--i) * 4deg));
      animation: flowGlow 2s ease-in-out infinite;
      animation-delay: calc(var(--i) * -220ms);
    }

    .viz-flow i:nth-child(1) { top: 44px; }
    .viz-flow i:nth-child(2) { top: 74px; }
    .viz-flow i:nth-child(3) { top: 104px; }
    .viz-flow i:nth-child(4) { top: 134px; }
    .viz-flow i:nth-child(5) { top: 164px; }

    @keyframes flowGlow {
      50% { border-color: var(--bio); filter: drop-shadow(0 0 7px var(--bio)); transform: rotate(calc(-8deg + var(--i) * 4deg)) translateX(18px); }
    }

    .viz-core i {
      position: absolute;
      top: 50%;
      left: 50%;
      width: calc(46px + var(--i) * 37px);
      aspect-ratio: 1;
      border: 1px solid rgba(32,217,232,.38);
      border-radius: 50%;
      transform: translate(-50%, -50%);
      animation: coreSpin calc(5s + var(--i) * 1s) linear infinite;
    }

    .viz-core i::before {
      content: "";
      position: absolute;
      top: 50%;
      left: -3px;
      width: 6px;
      height: 6px;
      border-radius: 50%;
      background: var(--bio);
      box-shadow: 0 0 12px var(--bio);
    }

    @keyframes coreSpin { to { transform: translate(-50%, -50%) rotate(1turn); } }

    .viz-online::before,
    .viz-online::after {
      content: "";
      position: absolute;
      top: 50%;
      left: 50%;
      width: 22px;
      height: 22px;
      border: 1px solid var(--bio);
      border-radius: 50%;
      transform: translate(-50%, -50%);
      box-shadow: 0 0 22px rgba(166,255,77,.5);
      animation: onlinePulse 2.3s ease-out infinite;
    }

    .viz-online::after { animation-delay: 1.15s; }

    @keyframes onlinePulse {
      to { width: 310px; height: 310px; opacity: 0; }
    }

    .feature__metrics {
      display: grid;
      gap: 0;
      margin-top: auto;
      border-top: 1px solid rgba(234,247,247,.14);
    }

    .feature__metric {
      display: grid;
      grid-template-columns: 44px 1fr auto;
      gap: 12px;
      padding: 13px 0;
      border-bottom: 1px solid rgba(234,247,247,.10);
      align-items: center;
      font-size: 9px;
      letter-spacing: .14em;
      text-transform: uppercase;
    }

    .feature__metric b { color: var(--ion); font-weight: 600; }
    .feature__metric span { color: rgba(234,247,247,.56); }
    .feature__metric em { color: var(--bio); font-style: normal; }

    #cursor-ring {
      position: fixed;
      z-index: 31;
      width: 32px;
      height: 32px;
      border: 1px solid rgba(234,247,247,.34);
      border-radius: 50%;
      pointer-events: none;
      transform: translate(-50%, -50%);
      transition: width .3s cubic-bezier(.2,.7,.2,1), height .3s cubic-bezier(.2,.7,.2,1), border-color .3s ease;
    }

    #cursor-ring::before {
      content: attr(data-label);
      position: absolute;
      inset: 0;
      display: grid;
      place-items: center;
      color: var(--bio);
      font-size: 8px;
      letter-spacing: .15em;
      opacity: 0;
    }

    #cursor-ring.is-action {
      width: 78px;
      height: 78px;
      border-color: var(--bio);
      background: rgba(7,10,11,.30);
    }

    #cursor-ring.is-action::before { opacity: 1; }

    #loader {
      position: fixed;
      inset: 0;
      z-index: 20;
      display: grid;
      place-items: center;
      background:
        radial-gradient(circle at 52% 44%, rgba(32, 217, 232, .08), transparent 34%),
        #070A0B;
      transition: opacity .9s ease, visibility .9s ease;
    }

    #loader.done { opacity: 0; visibility: hidden; }

    .loader-inner {
      width: min(84vw, 980px);
      text-align: center;
    }

    .loader-kicker {
      margin-bottom: 28px;
      color: var(--ion);
      font-size: 10px;
      letter-spacing: .34em;
      text-transform: uppercase;
    }

    .loader-word {
      margin: 0;
      color: transparent;
      font-size: clamp(58px, 13vw, 180px);
      font-weight: 700;
      line-height: .8;
      letter-spacing: -.085em;
      background: linear-gradient(90deg, var(--ice) var(--load), rgba(234,247,247,.10) var(--load));
      background-clip: text;
      -webkit-background-clip: text;
      filter: drop-shadow(0 0 25px rgba(32,217,232,.12));
    }

    .loader-meta {
      width: min(560px, 84vw);
      margin: 35px auto 0;
      display: grid;
      grid-template-columns: 1fr auto;
      gap: 13px;
      align-items: center;
      color: var(--muted);
      font-size: 9px;
      letter-spacing: .2em;
      text-transform: uppercase;
    }

    .loader-track {
      grid-column: 1 / -1;
      height: 1px;
      background: rgba(234,247,247,.12);
      overflow: hidden;
    }

    .loader-track span {
      display: block;
      width: var(--load);
      height: 100%;
      background: linear-gradient(90deg, var(--ion), var(--bio));
      box-shadow: 0 0 12px var(--ion);
      transition: width .16s linear;
    }

    #enter-experience {
      min-width: 190px;
      margin-top: 34px;
      padding: 14px 22px;
      border: 1px solid rgba(234,247,247,.28);
      background: rgba(7,10,11,.5);
      color: var(--ice);
      font-size: 10px;
      letter-spacing: .24em;
      text-transform: uppercase;
      cursor: pointer;
      opacity: 0;
      transform: translateY(8px);
      pointer-events: none;
      transition: .4s ease;
    }

    #enter-experience.ready {
      opacity: 1;
      transform: none;
      pointer-events: auto;
      border-color: rgba(166,255,77,.52);
    }

    #enter-experience:hover { background: var(--bio); color: var(--graphite); }

    #cursor {
      position: fixed;
      z-index: 30;
      width: 9px;
      height: 9px;
      border-radius: 50%;
      background: var(--bio);
      box-shadow: 0 0 16px rgba(166,255,77,.8);
      pointer-events: none;
      transform: translate(-50%, -50%);
      mix-blend-mode: screen;
    }

    .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;
    }

    @media (max-width: 760px) {
      .caption-left { width: calc(100vw - 48px); bottom: 236px; }
      #title-en { font-size: clamp(42px, 13vw, 72px); }
      .caption-right {
        left: 24px;
        right: auto;
        bottom: 72px;
        width: calc(100vw - 70px);
        padding: 12px 0 0 15px;
      }
      #body-zh { margin-bottom: 6px; line-height: 1.5; }
      .stage-specs { gap: 8px; margin: 10px 0; }
      .stage-spec { padding-top: 7px; }
      .stage-spec b { font-size: 14px; }
      .stage-spec span { font-size: 7px; }
      .status-row { display: none; }
      .group-tag { display: none; }
      #vignette { background: linear-gradient(0deg, rgba(7,10,11,.9), transparent 65%); }
      .interaction-cta {
        right: 24px;
        bottom: 18px;
        min-width: 0;
        padding: 11px 13px;
      }
      .interaction-cta__copy span { display: none; }
      .feature__panel { width: 100%; padding: 28px 24px; }
      .feature__eyebrow { margin-top: 30px; }
      .feature__viz { min-height: 190px; margin: 25px 0 20px; }
    }

    @media (pointer: coarse) { #cursor, #cursor-ring { display: none; } }