:root {
      --bg: #040512;
      --ink: #f7fbff;
      --muted: rgba(235, 241, 255, .7);
      --cyan: #39d5ff;
      --mint: #7cf7ff;
      --rose: #c15cff;
      --gold: #8f7dff;
      --violet: #7657ff;
      --deep: #12052e;
      --panel: rgba(10, 15, 42, .78);
      --line: rgba(255, 255, 255, .14);
      --scene-progress: 0;
      color-scheme: dark;
    }

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-width: 320px;
    background:
    radial-gradient(circle at 18% 8%, rgba(57, 213, 255, .24), transparent 28rem),
    radial-gradient(circle at 82% 18%, rgba(118, 87, 255, .22), transparent 24rem),
    linear-gradient(180deg, #030414 0%, #09123a 44%, #050615 100%);
    color: var(--ink);
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    overflow-x: hidden;
}

button,
input {
    font: inherit;
}

.progress {
    position: fixed;
    left: 0;
    top: 0;
    z-index: 100;
    width: calc(var(--page-progress, 0) * 100%);
    height: 3px;
    background: linear-gradient(90deg, var(--cyan), var(--mint), var(--rose), var(--gold));
    box-shadow: 0 0 22px rgba(40, 231, 255, .55);
}

.scene {
    position: relative;
    min-height: 100vh;
    display: grid;
    place-items: center;
    padding: clamp(28px, 5vw, 72px);
    isolation: isolate;
    overflow: hidden;
    perspective: 1200px;
}

.scene::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -3;
    opacity: calc(.18 + var(--active, 0) * .34);
    background-image:
    linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .035) 1px, transparent 1px);
    background-size: 64px 64px;
    transform:
    translateY(calc(var(--scene-progress) * -54px))
    scale(calc(1.05 + var(--active, 0) * .035))
    rotate(calc((.5 - var(--scene-progress)) * 1.5deg));
    mask-image: radial-gradient(circle at 50% 50%, #000 0 62%, transparent 82%);
}

.scene::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: -2;
    background:
    radial-gradient(ellipse at 50% calc(115% - var(--active, 0) * 42%), rgba(57, 213, 255, calc(.1 + var(--active, 0) * .2)), transparent 32rem),
    radial-gradient(circle at calc(20% + var(--scene-progress) * 34%) 20%, rgba(57, 213, 255, .17), transparent 24rem),
    radial-gradient(circle at calc(80% - var(--scene-progress) * 28%) 72%, rgba(118, 87, 255, .22), transparent 22rem),
    linear-gradient(180deg, rgba(5, 6, 18, .04), rgba(5, 6, 18, .74));
    opacity: calc(.68 + var(--active, 0) * .28);
    pointer-events: none;
}

.scene-inner {
    width: min(1180px, 100%);
    transform:
    translate3d(0, calc((1 - var(--active, 0)) * 56px), 0)
    scale(calc(.9 + var(--active, 0) * .1))
    rotateX(calc((1 - var(--active, 0)) * 4deg));
    opacity: calc(.28 + var(--active, 0) * .72);
    filter: blur(calc((1 - var(--active, 0)) * 1.2px)) saturate(calc(.9 + var(--active, 0) * .22));
    transform-origin: center center;
    will-change: transform, opacity, filter;
}

.scene-inner > .kicker,
.scene-inner > h2,
.scene-inner > p {
    margin-left: auto;
    margin-right: auto;
    text-align: center;
}

.scene-inner > p {
    max-width: 760px;
}

.kicker {
    margin: 0 0 12px;
    color: var(--cyan);
    font-size: 12px;
    font-weight: 800;
    letter-spacing: .18em;
    text-transform: uppercase;
}

h1,
h2 {
    margin: 0;
    letter-spacing: 0;
    line-height: .95;
}

h2 {
    font-size: clamp(36px, 7vw, 92px);
    max-width: 980px;
    text-align: center;
}

p {
    color: var(--muted);
    line-height: 1.7;
    font-size: clamp(15px, 1.6vw, 19px);
}

.glass {
    border: 1px solid var(--line);
    background: linear-gradient(145deg, rgba(255, 255, 255, .11), rgba(255, 255, 255, .045));
    box-shadow: 0 28px 100px rgba(0, 0, 0, .38);
    backdrop-filter: blur(24px);
    border-radius: 8px;
}

.scene-hero {
    min-height: 140vh;
}

.letter-field {
    position: absolute;
    inset: 0;
    z-index: -1;
    display: grid;
    align-content: start;
    gap: clamp(18px, 4vw, 54px);
    opacity: .5;
    padding-top: clamp(60px, 11vh, 130px);
    transform: translateY(10vh) rotate(-5deg) scale(1.08);
    filter: drop-shadow(0 0 12px rgba(40, 231, 255, .18));
}

.letter-row {
    --speed: 24s;
    --start: -18%;
    white-space: nowrap;
    font-size: clamp(44px, 10vw, 142px);
    font-weight: 950;
    line-height: .78;
    color: transparent;
    -webkit-text-stroke: 1px rgba(210, 226, 255, .28);
    text-transform: uppercase;
    transform: translateX(calc(var(--dir) * var(--scene-progress) * 16vw));
    will-change: transform;
    overflow: visible;
    display: flex;
    gap: .24em;
}

.letter-row:nth-child(even) {
    -webkit-text-stroke-color: rgba(193, 92, 255, .34);
}

.letter-row span {
    flex: 0 0 auto;
    min-width: max-content;
    animation: marquee var(--speed) linear infinite;
    animation-direction: var(--marquee-direction, normal);
    background: linear-gradient(90deg, rgba(255,255,255,.08), rgba(57,213,255,.28), rgba(193,92,255,.24), rgba(255,255,255,.08));
    -webkit-background-clip: text;
    background-clip: text;
}

.letter-row:nth-child(1) { --start: -10%; }
.letter-row:nth-child(2) { --speed: 28s; --start: -38%; --marquee-direction: reverse; }
.letter-row:nth-child(3) { --speed: 22s; --start: -22%; }
.letter-row:nth-child(4) { --speed: 31s; --start: -52%; --marquee-direction: reverse; }

@keyframes marquee {
    from { transform: translateX(var(--start)); }
    to { transform: translateX(calc(var(--start) - 100%)); }
}

.music-player {
    position: absolute;
    right: clamp(16px, 5vw, 68px);
    top: 50%;
    z-index: 3;
    width: min(310px, calc(100vw - 32px));
    padding: 16px;
    transform: translateY(-50%) translateX(calc(100% - 46px));
    opacity: calc(.2 + var(--active, 0) * .8);
    transition: transform .55s cubic-bezier(.18, .9, .2, 1), opacity .3s ease;
}

.music-player:hover,
.music-player:focus-within {
    transform: translateY(-50%) translateX(0);
    opacity: 1;
}

.music-player.intro {
    animation: playerIntro 3.3s cubic-bezier(.18, .9, .2, 1) forwards;
}

.music-player::after {
    content: "♫";
    position: absolute;
    left: 0;
    top: 50%;
    width: 36px;
    height: 74px;
    display: grid;
    place-items: center;
    transform: translate(-50%, -50%);
    border-radius: 999px;
    color: var(--ink);
    background: linear-gradient(180deg, var(--cyan), var(--violet));
    box-shadow: 0 0 26px rgba(57, 213, 255, .44);
    font-weight: 950;
}

@keyframes playerIntro {
    0%, 72% { transform: translateY(-50%) translateX(0); opacity: 1; }
    100% { transform: translateY(-50%) translateX(calc(100% - 46px)); opacity: .86; }
}

.music-player::before {
    content: "";
    position: absolute;
    inset: -1px;
    z-index: -1;
    border-radius: inherit;
    background: linear-gradient(145deg, rgba(57, 213, 255, .28), rgba(118, 87, 255, .2), rgba(193, 92, 255, .2));
    filter: blur(16px);
    opacity: .8;
}

.music-meta {
    display: grid;
    grid-template-columns: 48px 1fr;
    gap: 12px;
    align-items: center;
}

.album {
    width: 48px;
    height: 48px;
    border-radius: 8px;
    background:
    conic-gradient(from 120deg, var(--cyan), var(--violet), var(--rose), var(--cyan));
    box-shadow: inset 0 0 0 9px rgba(4, 5, 18, .55), 0 0 28px rgba(57, 213, 255, .26);
    animation: spinDisc 8s linear infinite;
    animation-play-state: paused;
}

.music-player.playing .album {
    animation-play-state: running;
}

@keyframes spinDisc {
    to { transform: rotate(360deg); }
}

.music-title {
    margin: 0;
    color: var(--ink);
    font-size: 14px;
    font-weight: 850;
}

.music-sub {
    margin: 3px 0 0;
    color: rgba(235, 241, 255, .58);
    font-size: 12px;
    line-height: 1.4;
}

.music-controls {
    display: grid;
    grid-template-columns: 52px 1fr;
    gap: 12px;
    align-items: center;
    margin-top: 14px;
}

.music-toggle {
    width: 52px;
    height: 44px;
    border: 0;
    border-radius: 8px;
    color: #07101c;
    cursor: pointer;
    font-weight: 950;
    background: linear-gradient(135deg, var(--cyan), var(--violet));
    box-shadow: 0 0 28px rgba(57, 213, 255, .22);
}

.equalizer {
    height: 44px;
    display: flex;
    align-items: end;
    gap: 5px;
    padding: 8px;
    border-radius: 8px;
    background: rgba(255, 255, 255, .06);
    border: 1px solid rgba(255, 255, 255, .1);
}

.equalizer i {
    flex: 1;
    height: 28%;
    border-radius: 999px;
    background: linear-gradient(180deg, var(--cyan), var(--rose));
    animation: eq 1s ease-in-out infinite alternate;
    animation-play-state: paused;
    animation-delay: calc(var(--i) * -90ms);
}

.music-player.playing .equalizer i {
    animation-play-state: running;
}

@keyframes eq {
    to { height: calc(34% + var(--i) * 8%); }
}

.hero-center {
    text-align: center;
    width: min(980px, 100%);
    padding: clamp(22px, 5vw, 54px) 0;
    transform:
    translate3d(0, calc(-28vh + (1 - var(--active, 0)) * 56px), 0)
    scale(calc(.9 + var(--active, 0) * .1))
    rotateX(calc((1 - var(--active, 0)) * 4deg));
}

.hero-center h1 {
    font-size: clamp(58px, 12vw, 168px);
    font-weight: 1000;
    display: inline-block;
    width: auto;
    max-width: max-content;
    white-space: nowrap;
    overflow: hidden;
    background: linear-gradient(90deg, #fff 4%, var(--cyan), var(--violet), var(--rose), #fff 96%);
    background-size: 280% 100%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: titleFlow 5.5s linear infinite;
    text-shadow: 0 0 70px rgba(57, 213, 255, .2);
}

.hero-center p {
    max-width: 720px;
    margin: 26px auto 0;
}

@keyframes titleFlow {
    to { background-position: 280% 0; }
}

.scene-code .scene-inner {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 190px;
    gap: 22px;
    align-items: stretch;
}

.editor {
    overflow: hidden;
    min-height: min(70vh, 620px);
}

.editor-top,
.draw-top,
.chat-top {
    display: flex;
    align-items: center;
    gap: 10px;
    height: 46px;
    padding: 0 16px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, .055);
}

.dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
    background: var(--rose);
    box-shadow: 18px 0 0 var(--gold), 36px 0 0 var(--mint);
    flex: 0 0 auto;
}

.tab-title {
    margin-left: 48px;
    color: rgba(255, 255, 255, .75);
    font-size: 13px;
}

pre {
    margin: 0;
    padding: clamp(16px, 3vw, 34px);
    overflow: auto;
    font-size: clamp(12px, 1.35vw, 16px);
    line-height: 1.72;
    color: #d9f8ff;
    min-height: calc(min(70vh, 620px) - 46px);
}

.code-key { color: #ff87c2; }
.code-fn { color: #6fffe2; }
.code-str { color: #ffd166; }
.code-num { color: #92a8ff; }
.code-com { color: rgba(255, 255, 255, .42); }

.run-rail {
    display: grid;
    align-content: center;
    gap: 18px;
    padding: 18px;
}

.run-button,
.start-button,
.demo-button,
.send-button {
    position: relative;
    border: 0;
    color: #061015;
    cursor: pointer;
    font-weight: 900;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--cyan), var(--violet) 52%, var(--rose));
    box-shadow: 0 18px 44px rgba(57, 213, 255, .22);
    transition: transform .2s ease, filter .2s ease;
}

.run-button {
    min-height: 86px;
    font-size: 22px;
}

.run-button::before,
.send-button::before {
    content: "点击这里";
    position: absolute;
    left: 50%;
    bottom: calc(100% + 12px);
    width: max-content;
    transform: translateX(-50%);
    padding: 7px 10px;
    border-radius: 8px;
    color: #f7fbff;
    font-size: 12px;
    line-height: 1;
    background: rgba(15, 20, 54, .92);
    border: 1px solid rgba(124, 247, 255, .32);
    box-shadow: 0 0 26px rgba(57, 213, 255, .22);
    animation: hintFloat 1.15s ease-in-out infinite alternate;
    pointer-events: none;
}

.run-button::after,
.send-button::after {
    content: "";
    position: absolute;
    left: 50%;
    bottom: calc(100% + 1px);
    width: 12px;
    height: 12px;
    border-right: 2px solid var(--cyan);
    border-bottom: 2px solid var(--cyan);
    transform: translateX(-50%) rotate(45deg);
    animation: arrowPulse 1.15s ease-in-out infinite alternate;
    pointer-events: none;
}

@keyframes hintFloat {
    to { transform: translateX(-50%) translateY(-7px); filter: brightness(1.2); }
}

@keyframes arrowPulse {
    to { transform: translateX(-50%) translateY(-6px) rotate(45deg); opacity: .45; }
}

.run-button:hover,
.start-button:hover,
.demo-button:hover,
.send-button:hover {
    transform: translateY(-2px) scale(1.02);
    filter: saturate(1.18);
}

.run-status {
    min-height: 74px;
    padding: 14px;
    color: rgba(255, 255, 255, .7);
    font-size: 13px;
    line-height: 1.55;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 14px;
}

.tile {
    min-height: 210px;
    padding: 16px;
    position: relative;
    overflow: hidden;
}

.tile h3 {
    margin: 0 0 10px;
    font-size: 14px;
    color: rgba(255, 255, 255, .82);
    letter-spacing: .08em;
    text-transform: uppercase;
}

.curve {
    position: absolute;
    inset: 52px 14px 18px;
    background:
    radial-gradient(circle at 18% 75%, var(--cyan) 0 3px, transparent 4px),
    radial-gradient(circle at 38% 42%, var(--mint) 0 3px, transparent 4px),
    radial-gradient(circle at 60% 52%, var(--gold) 0 3px, transparent 4px),
    radial-gradient(circle at 82% 24%, var(--rose) 0 3px, transparent 4px);
}

.curve svg,
.chart svg,
.network svg {
    width: 100%;
    height: 100%;
    display: block;
}

.helix {
    position: absolute;
    inset: 50px 20px 18px;
    transform-style: preserve-3d;
    perspective: 650px;
}

.helix span {
    position: absolute;
    left: 50%;
    top: 50%;
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: hsl(calc(var(--i) * 18), 95%, 68%);
    transform:
    rotateY(calc(var(--i) * 19deg + var(--scene-progress) * 220deg))
    translateX(70px)
    translateY(calc((var(--i) - 10) * 7px));
    box-shadow: 0 0 18px currentColor;
}

.data-lines {
    display: grid;
    gap: 8px;
    margin-top: 12px;
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    font-size: 13px;
    color: rgba(219, 252, 255, .82);
}

.data-lines span {
    display: flex;
    justify-content: space-between;
    border-bottom: 1px dashed rgba(255, 255, 255, .14);
    padding-bottom: 7px;
}

.chart,
.network,
.pulse-field,
.matrix,
.orbital {
    position: absolute;
    inset: 52px 16px 18px;
}

.bars {
    display: flex;
    align-items: end;
    gap: 8px;
    height: 100%;
}

.bars i {
    flex: 1;
    min-width: 8px;
    height: var(--h);
    border-radius: 7px 7px 2px 2px;
    background: linear-gradient(180deg, var(--mint), var(--cyan));
    animation: breathe 2.6s ease-in-out infinite alternate;
    animation-delay: var(--d);
}

@keyframes breathe {
    to { height: calc(var(--h) * .72); filter: hue-rotate(80deg); }
}

.pulse-field {
    background:
    radial-gradient(circle at 50% 50%, transparent 0 18%, rgba(40, 231, 255, .18) 19% 20%, transparent 21%),
    radial-gradient(circle at 50% 50%, transparent 0 36%, rgba(56, 247, 181, .14) 37% 38%, transparent 39%),
    radial-gradient(circle at 50% 50%, transparent 0 54%, rgba(255, 78, 163, .12) 55% 56%, transparent 57%);
    animation: radar 2.8s linear infinite;
}

@keyframes radar {
    to { transform: rotate(360deg); }
}

.matrix {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 7px;
}

.matrix i {
    border-radius: 6px;
    background: rgba(255, 255, 255, .08);
    box-shadow: inset 0 0 0 1px rgba(255, 255, 255, .08);
    animation: cell 2.4s infinite alternate;
    animation-delay: calc(var(--i) * -80ms);
}

@keyframes cell {
    to { background: rgba(56, 247, 181, .54); transform: scale(.72); }
}

.orbital {
    display: grid;
    place-items: center;
}

.orbit {
    width: 140px;
    height: 140px;
    border: 1px solid rgba(255, 255, 255, .22);
    border-radius: 50%;
    animation: radar 5s linear infinite;
}

.orbit::before,
.orbit::after {
    content: "";
    position: absolute;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--gold);
    box-shadow: 0 0 24px var(--gold);
    transform: translate(120px, 40px);
}

.orbit::after {
    background: var(--rose);
    transform: translate(22px, 96px);
}

.orchestrator {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: clamp(18px, 4vw, 42px);
    align-items: center;
}

.orchestrator > div:first-child {
    text-align: center;
}

.orchestrator > div:first-child h2,
.orchestrator > div:first-child p {
    margin-left: auto;
    margin-right: auto;
}

.stack {
    display: grid;
    gap: 14px;
}

.stack-card {
    padding: 18px;
    display: grid;
    grid-template-columns: 42px 1fr auto;
    gap: 14px;
    align-items: center;
    transform: translateX(calc((1 - var(--active, 0)) * -30px));
    transition: transform .55s ease;
}

.stack-card b {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 8px;
    color: #061015;
    background: linear-gradient(135deg, var(--gold), var(--rose));
}

.stack-card strong {
    display: block;
    margin-bottom: 4px;
}

.stack-card span {
    color: rgba(255, 255, 255, .58);
    font-size: 13px;
}

.flow-map {
    min-height: 470px;
    position: relative;
}

.flow-node {
    position: absolute;
    display: grid;
    place-items: center;
    width: 118px;
    height: 118px;
    border-radius: 50%;
    color: #061015;
    font-weight: 950;
    background: linear-gradient(135deg, var(--cyan), var(--mint));
    box-shadow: 0 0 58px rgba(40, 231, 255, .24);
}

.flow-node:nth-child(1) { left: 8%; top: 16%; }
.flow-node:nth-child(2) { right: 12%; top: 8%; background: linear-gradient(135deg, var(--gold), var(--rose)); }
.flow-node:nth-child(3) { left: 37%; top: 38%; background: linear-gradient(135deg, #fff, var(--cyan)); }
.flow-node:nth-child(4) { right: 18%; bottom: 12%; background: linear-gradient(135deg, var(--mint), var(--gold)); }

.flow-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .7), transparent);
    transform-origin: left center;
    animation: shimmer 1.8s linear infinite;
}

.line-a { left: 23%; top: 30%; width: 45%; rotate: -8deg; }
.line-b { left: 48%; top: 52%; width: 32%; rotate: 35deg; }
.line-c { left: 19%; top: 63%; width: 38%; rotate: -32deg; }

@keyframes shimmer {
    from { opacity: .22; filter: blur(1px); }
    50% { opacity: 1; filter: blur(0); }
    to { opacity: .22; filter: blur(1px); }
}

.draw-editor {
    overflow: hidden;
}

.draw-shell {
    display: grid;
    grid-template-columns: 76px 1fr 220px;
    min-height: 620px;
}

.tools,
.inspector {
    border-right: 1px solid var(--line);
    background: rgba(255, 255, 255, .035);
    padding: 14px;
    display: grid;
    align-content: start;
    gap: 12px;
}

.inspector {
    border-right: 0;
    border-left: 1px solid var(--line);
}

.tool-icon {
    width: 46px;
    height: 46px;
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, .14);
    display: grid;
    place-items: center;
    color: rgba(255, 255, 255, .82);
    background: rgba(255, 255, 255, .06);
}

.canvas {
    position: relative;
    min-height: 620px;
    background:
    linear-gradient(rgba(255, 255, 255, .04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, .04) 1px, transparent 1px);
    background-size: 28px 28px;
}

.shape {
    position: absolute;
    display: grid;
    place-items: center;
    min-width: 128px;
    min-height: 70px;
    padding: 16px;
    border: 2px solid rgba(255, 255, 255, .52);
    background: rgba(8, 14, 26, .88);
    box-shadow: 0 18px 42px rgba(0, 0, 0, .28);
    font-weight: 850;
}

.shape.round { border-radius: 999px; left: 8%; top: 12%; border-color: var(--mint); }
.shape.rect { border-radius: 8px; left: 38%; top: 18%; border-color: var(--cyan); }
.shape.diamond {
    left: 64%;
    top: 42%;
    width: 126px;
    height: 126px;
    transform: rotate(45deg);
    border-color: var(--gold);
}

.shape.diamond span {
    transform: rotate(-45deg);
}

.shape.end { right: 9%; bottom: 12%; border-color: var(--rose); }

.connector {
    position: absolute;
    height: 3px;
    background: linear-gradient(90deg, var(--mint), var(--cyan));
    transform-origin: left center;
    box-shadow: 0 0 20px rgba(40, 231, 255, .36);
}

.conn-1 { left: 24%; top: 21%; width: 18%; rotate: 6deg; }
.conn-2 { left: 50%; top: 32%; width: 20%; rotate: 35deg; }
.conn-3 { left: 69%; top: 62%; width: 16%; rotate: 32deg; background: linear-gradient(90deg, var(--gold), var(--rose)); }

.inspector h3 {
    margin: 0;
    font-size: 14px;
}

.prop {
    display: grid;
    gap: 7px;
    color: rgba(255, 255, 255, .62);
    font-size: 12px;
}

.prop i {
    height: 9px;
    border-radius: 999px;
    background: linear-gradient(90deg, var(--cyan), rgba(255, 255, 255, .1));
}

.chat-app {
    width: min(960px, 100%);
    overflow: hidden;
    margin: auto;
}

.messages {
    min-height: 520px;
    padding: clamp(16px, 3vw, 28px);
    display: grid;
    align-content: end;
    gap: 14px;
    background:
    radial-gradient(circle at 14% 10%, rgba(40, 231, 255, .12), transparent 18rem),
    rgba(255, 255, 255, .026);
}

.bubble {
    max-width: 72%;
    padding: 14px 16px;
    border-radius: 8px;
    color: rgba(255, 255, 255, .84);
    background: rgba(255, 255, 255, .08);
    border: 1px solid rgba(255, 255, 255, .1);
}

.bubble.user {
    justify-self: end;
    color: #061015;
    background: linear-gradient(135deg, var(--cyan), var(--mint));
    border-color: transparent;
}

.bubble.bot {
    font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
    white-space: pre-wrap;
}

.typing::after {
    content: "";
    display: inline-block;
    width: 9px;
    height: 1.1em;
    margin-left: 4px;
    vertical-align: -2px;
    background: var(--mint);
    animation: blink .7s steps(1) infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

.chat-input {
    display: grid;
    grid-template-columns: 1fr 120px;
    gap: 10px;
    padding: 14px;
    border-top: 1px solid var(--line);
}

.chat-input input {
    min-width: 0;
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: 8px;
    padding: 14px 15px;
    color: var(--ink);
    background: rgba(255, 255, 255, .07);
    outline: 0;
}

.send-button {
    min-height: 48px;
}

.scene-cosmos {
    min-height: 115vh;
    background:
    radial-gradient(circle at 74% 18%, rgba(255, 255, 255, .95) 0 1px, transparent 1.6px),
    radial-gradient(circle at 18% 40%, rgba(255, 255, 255, .8) 0 1px, transparent 1.8px),
    radial-gradient(circle at 44% 18%, rgba(255, 255, 255, .64) 0 1px, transparent 1.7px),
    radial-gradient(circle at 84% 72%, rgba(255, 255, 255, .76) 0 1px, transparent 1.8px),
    radial-gradient(circle at 24% 76%, rgba(124, 247, 255, .5) 0 1px, transparent 2px),
    radial-gradient(ellipse at 30% 26%, rgba(57, 213, 255, .18), transparent 32rem),
    radial-gradient(ellipse at 72% 54%, rgba(118, 87, 255, .26), transparent 34rem),
    radial-gradient(ellipse at 50% 100%, rgba(193, 92, 255, .12), transparent 35rem),
    linear-gradient(180deg, #01020a, #05102d 48%, #01030b);
}

.scene-cosmos::before {
    background-image:
    radial-gradient(circle, rgba(255,255,255,.82) 0 1px, transparent 1.5px),
    radial-gradient(circle, rgba(124,247,255,.62) 0 1px, transparent 1.7px);
    background-size: 130px 130px, 210px 210px;
    background-position: calc(var(--scene-progress) * -70px) calc(var(--scene-progress) * -40px), calc(var(--scene-progress) * 90px) calc(var(--scene-progress) * 45px);
    opacity: .48;
    mask-image: none;
    transform: none;
}

.earth {
    position: absolute;
    right: min(-12vw, -30px);
    bottom: min(-22vw, -80px);
    width: clamp(360px, 58vw, 820px);
    aspect-ratio: 1;
    border-radius: 50%;
    background:
    radial-gradient(circle at 30% 24%, rgba(255, 255, 255, .6), transparent 12%),
    radial-gradient(ellipse at 38% 34%, rgba(255,255,255,.45), transparent 9%),
    radial-gradient(ellipse at 52% 46%, rgba(255,255,255,.34), transparent 11%),
    radial-gradient(ellipse at 39% 58%, rgba(255,255,255,.32), transparent 10%),
    radial-gradient(ellipse at 48% 42%, rgba(67, 210, 140, .9), transparent 13%),
    radial-gradient(ellipse at 29% 62%, rgba(67, 210, 140, .82), transparent 15%),
    radial-gradient(ellipse at 63% 57%, rgba(67, 210, 140, .74), transparent 16%),
    radial-gradient(ellipse at 68% 30%, rgba(178, 139, 88, .52), transparent 10%),
    radial-gradient(circle at 38% 38%, #3cc8ff 0 24%, #126fcf 47%, #082d72 68%, #020718 100%);
    box-shadow:
    inset -80px -90px 130px rgba(0, 0, 0, .82),
    inset 28px 20px 52px rgba(255, 255, 255, .2),
    -16px -10px 42px rgba(124, 247, 255, .18),
    0 0 0 1px rgba(124, 247, 255, .18),
    0 0 90px rgba(57, 213, 255, .42),
    0 0 210px rgba(57, 213, 255, .23);
    transform: translateY(calc(var(--scene-progress) * 70px)) scale(calc(.92 + var(--active, 0) * .08));
}

.earth::before {
    content: "";
    position: absolute;
    inset: -3%;
    border-radius: 50%;
    background:
    linear-gradient(105deg, transparent 0 42%, rgba(255,255,255,.24) 48%, transparent 54%),
    radial-gradient(circle at 30% 36%, transparent 0 38%, rgba(124,247,255,.18) 39% 42%, transparent 43%);
    mix-blend-mode: screen;
    animation: cloudDrift 16s linear infinite;
}

.earth::after {
    content: "";
    position: absolute;
    inset: -5%;
    border-radius: 50%;
    background: radial-gradient(circle at 72% 64%, rgba(0,0,0,.66), transparent 45%);
    box-shadow: 0 0 55px rgba(124, 247, 255, .3);
    pointer-events: none;
}

@keyframes cloudDrift {
    to { transform: rotate(360deg); }
}

.cosmos-copy {
    text-align: center;
    position: relative;
    z-index: 2;
}

.beian-badge {
    position: absolute;
    left: clamp(18px, 4vw, 48px);
    bottom: clamp(18px, 4vw, 36px);
    display: inline-flex;
    align-items: center;
    flex-wrap: wrap;
    column-gap: 10px;
    row-gap: 4px;
    margin: 0;
    z-index: 3;
    font-size: 14px;
    line-height: 1;
    color: rgba(255, 255, 255, .82);
}

.beian-badge img {
    display: block;
    width: 20px;
    height: 20px;
    object-fit: contain;
}

.beian-badge a {
    color: inherit;
    text-decoration: none;
    white-space: nowrap;
}

.beian-badge a:hover {
    color: #fff;
}

.beian-copy {
    color: rgba(255, 255, 255, .7);
    white-space: nowrap;
}

.cosmos-actions {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 15px;
    margin-top: 34px;
    flex-wrap: wrap;
}

.start-button {
    min-width: min(228px, 42vw);
    min-height: 74px;
    font-size: clamp(18px, 2.2vw, 26px);
}

.demo-button {
    min-width: min(228px, 42vw);
    min-height: 74px;
    font-size: clamp(18px, 2.2vw, 26px);
    background: linear-gradient(135deg, #39d5ff, #43d28c 58%, #7cf7ff);
}

.fade-flash {
    position: fixed;
    inset: 0;
    z-index: 90;
    pointer-events: none;
    opacity: 0;
    background: radial-gradient(circle at 50% 50%, rgba(56, 247, 181, .28), rgba(40, 231, 255, .18), rgba(5, 6, 10, .92));
    transition: opacity .55s ease;
}

.fade-flash.on {
    opacity: 1;
}

@media (max-width: 860px) {
    .scene {
    padding: 26px 16px;
    }

    .scene-code .scene-inner,
    .orchestrator {
    grid-template-columns: 1fr;
    }

    .run-rail {
    grid-template-columns: 1fr;
    }

    .result-grid {
    grid-template-columns: 1fr;
    }

    .tile {
    min-height: 190px;
    }

    .draw-shell {
    grid-template-columns: 56px 1fr;
    }

    .inspector {
    display: none;
    }

    .tools {
    padding: 8px;
    }

    .tool-icon {
    width: 38px;
    height: 38px;
    }

    .bubble {
    max-width: 92%;
    }

    .chat-input {
    grid-template-columns: 1fr;
    }

    .shape {
    min-width: 96px;
    min-height: 58px;
    font-size: 12px;
    }

    .shape.diamond {
    width: 92px;
    height: 92px;
    }

    .letter-row {
    font-size: clamp(54px, 22vw, 112px);
    }

    .music-player {
    top: auto;
    right: 16px;
    bottom: 18px;
    transform: translateX(calc(100% - 46px));
    width: min(300px, calc(100vw - 32px));
    }

    .music-player:hover,
    .music-player:focus-within {
    transform: translateX(0);
    }

    .music-player.intro {
    animation-name: playerIntroMobile;
    }

    @keyframes playerIntroMobile {
    0%, 72% { transform: translateX(0); opacity: 1; }
    100% { transform: translateX(calc(100% - 46px)); opacity: .86; }
    }

    .music-title {
    font-size: 13px;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: .001ms !important;
    }
}