/* ─────────────────────────────────────────────────────────────
   对话特效 · 一屏版
   Atmospheric glow, glass product panel, quiet type.
   ───────────────────────────────────────────────────────────── */

:root {
  --bg: #07060d;
  --text: #f6f3ee;
  --muted: #a9a3b6;
  --faint: #716b80;
  --line: rgba(255, 255, 255, 0.12);
  --line-strong: rgba(255, 255, 255, 0.26);
  --panel: rgba(10, 9, 17, 0.58);
  --mint: #9be8d7;
  --peach: #ffc3ae;
  --lavender: #c9b8ff;
  --sans: "Inter", "Helvetica Neue", "PingFang SC", "Microsoft YaHei",
    Arial, sans-serif;
  --mono: "SFMono-Regular", "Cascadia Mono", Consolas, "Liberation Mono",
    monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100svh;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.7 var(--sans);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

::selection {
  background: var(--lavender);
  color: #111018;
}

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

button {
  color: inherit;
  font: inherit;
}

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

:focus-visible {
  outline: 2px solid var(--peach);
  outline-offset: 3px;
}

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 100;
  padding: 10px 12px;
  background: var(--text);
  color: #111018;
  font: 10px/1 var(--mono);
  transform: translateY(-160%);
  transition: transform 0.2s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.noscript {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  margin: 0;
  padding: 10px 18px;
  background: var(--text);
  color: #111018;
  font-size: 11px;
  text-align: center;
}

/* ── atmosphere ─────────────────────────────────────────────── */

.bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
  background: #07060d;
}

#bgCanvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  opacity: 0.38;
}

.bg-wash {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(
      ellipse 52% 44% at 76% 12%,
      rgba(128, 92, 255, 0.38),
      transparent 72%
    ),
    radial-gradient(
      ellipse 48% 42% at 86% 78%,
      rgba(255, 126, 143, 0.2),
      transparent 70%
    ),
    radial-gradient(
      ellipse 46% 44% at 24% 86%,
      rgba(54, 102, 202, 0.18),
      transparent 72%
    ),
    linear-gradient(
      90deg,
      rgba(7, 6, 13, 0.92) 0%,
      rgba(7, 6, 13, 0.58) 46%,
      rgba(7, 6, 13, 0.22) 100%
    ),
    linear-gradient(
      180deg,
      rgba(7, 6, 13, 0.2) 0%,
      rgba(7, 6, 13, 0.16) 58%,
      rgba(7, 6, 13, 0.9) 100%
    );
}

.bg::after {
  content: "";
  position: absolute;
  left: 54%;
  top: 16%;
  width: 46vw;
  height: 46vw;
  max-width: 720px;
  max-height: 720px;
  border-radius: 50%;
  background: radial-gradient(
    circle,
    rgba(181, 154, 255, 0.18),
    rgba(255, 167, 150, 0.08) 42%,
    transparent 68%
  );
  filter: blur(30px);
}

.grain {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='180' height='180'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='180' height='180' filter='url(%23n)'/%3E%3C/svg%3E");
  mix-blend-mode: screen;
}

/* ── page frame ─────────────────────────────────────────────── */

.page {
  position: relative;
  z-index: 1;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
}

.top {
  width: min(1280px, calc(100% - 80px));
  height: 76px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  padding-block: 8px;
}

.logo {
  width: 27px;
  height: 27px;
  display: block;
  flex: none;
}

.logo svg {
  width: 100%;
  height: 100%;
  display: block;
}

.brand-text {
  font-size: 13.5px;
  font-weight: 600;
  line-height: 1;
  letter-spacing: 0.01em;
}

.top-right {
  display: flex;
  align-items: center;
  gap: 11px;
}

.plugin-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  min-height: 28px;
  padding: 0 10px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
  color: #f1edf5;
  font: 10.5px/1 var(--sans);
  font-weight: 500;
  letter-spacing: 0.04em;
  white-space: nowrap;
}

.plugin-tag::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 8px rgba(155, 232, 215, 0.7);
}

.motion {
  position: relative;
  width: 34px;
  height: 34px;
  padding: 0;
  display: inline-grid;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.03);
  color: var(--muted);
  font: 9px/1 var(--mono);
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease,
    background-color 0.2s ease;
}

.motion::before {
  content: "";
  position: absolute;
  inset: -5px;
}

.motion:hover {
  color: var(--text);
  border-color: var(--line-strong);
  background: rgba(255, 255, 255, 0.07);
}

.motion[aria-pressed="true"] {
  background: var(--text);
  border-color: var(--text);
  color: #111018;
}

.motion:disabled {
  opacity: 0.5;
  cursor: default;
}

.motion-paused .live i,
.motion-paused .spinner {
  animation: none;
}

/* ── hero ───────────────────────────────────────────────────── */

.hero {
  flex: 1;
  display: flex;
  align-items: center;
  min-height: 0;
}

.hero-inner {
  width: min(1280px, calc(100% - 80px));
  margin-inline: auto;
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
  gap: clamp(40px, 4.4vw, 64px);
  align-items: center;
  padding-block: 28px;
}

.copy {
  min-width: 0;
  animation: rise 0.8s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.hero h1 {
  margin: 0 0 24px;
  font-family: var(--sans);
  font-size: clamp(58px, 5.45vw, 78px);
  font-weight: 600;
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.grad {
  color: var(--peach);
  background: linear-gradient(92deg, #f8f5ef 0%, #ffc5b0 48%, #c9b8ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.lead {
  margin: 0;
  max-width: 35em;
  font-size: 13.5px;
  line-height: 1.95;
  color: var(--muted);
}

.actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 28px;
}

.install {
  min-height: 48px;
  padding: 0 20px;
  display: inline-flex;
  align-items: center;
  gap: 18px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 999px;
  background: var(--text);
  color: #111018;
  font: 11.5px/1 var(--sans);
  font-weight: 600;
  cursor: pointer;
  box-shadow: 0 12px 34px rgba(0, 0, 0, 0.26);
  transition: transform 0.22s ease, background-color 0.22s ease,
    border-color 0.22s ease;
}

.install:hover {
  transform: translateY(-2px);
  background: #fff;
}

.install-arrow {
  font-size: 15px;
  line-height: 1;
  transition: transform 0.22s ease;
}

.install:hover .install-arrow {
  transform: translate(2px, -2px);
}

.install.copied {
  background: var(--mint);
  border-color: var(--mint);
}

.free {
  font: 11px/1.5 var(--sans);
  letter-spacing: 0.03em;
  color: #d6d0df;
}

.install-note {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 12px 0 0;
  padding: 6px 10px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 7px;
  background: rgba(255, 255, 255, 0.045);
  font: 11px/1.5 var(--sans);
  letter-spacing: 0.02em;
  color: #d4cedf;
}

.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;
}

.features {
  list-style: none;
  margin: 32px 0 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 11px;
  max-width: 420px;
}

.features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 11.5px;
  line-height: 1.5;
  color: #d2cdda;
}

.features svg {
  width: 14px;
  height: 14px;
  flex: none;
  fill: none;
  stroke: var(--lavender);
  stroke-width: 1.2;
  stroke-linecap: round;
  stroke-linejoin: round;
  opacity: 0.9;
}

/* ── preview ────────────────────────────────────────────────── */

.preview-block {
  position: relative;
  min-width: 0;
  isolation: isolate;
  animation: rise 0.9s 0.1s cubic-bezier(0.22, 0.61, 0.36, 1) both;
}

.preview-block::before {
  content: "";
  position: absolute;
  inset: 4% -5% 12% -4%;
  z-index: -1;
  border-radius: 50%;
  background: radial-gradient(
    ellipse at 58% 44%,
    rgba(160, 128, 255, 0.24),
    rgba(255, 143, 142, 0.1) 42%,
    transparent 70%
  );
  filter: blur(44px);
  pointer-events: none;
}

.panel {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 20px;
  background: #09080f;
  box-shadow: 0 45px 110px rgba(0, 0, 0, 0.58),
    inset 0 1px 0 rgba(255, 255, 255, 0.08);
  isolation: isolate;
}

.panel canvas {
  position: absolute;
  inset: 0;
  z-index: 0;
  width: 100%;
  height: 100%;
  opacity: 1;
  transition: opacity 0.18s ease;
}

.panel canvas.cutting {
  opacity: 0.08;
}

.panel-veil {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  background: linear-gradient(
    90deg,
    rgba(10, 9, 18, 0) 0%,
    rgba(10, 9, 18, 0.14) 17%,
    rgba(10, 9, 18, 0.76) 31%,
    rgba(10, 9, 18, 0.76) 69%,
    rgba(10, 9, 18, 0.14) 83%,
    rgba(10, 9, 18, 0) 100%
  );
}

.panel-body {
  position: relative;
  z-index: 2;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.panel-head {
  flex: none;
  height: 45px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  background: rgba(10, 9, 18, 0.28);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  font: 8.5px/1 var(--sans);
  letter-spacing: 0.06em;
  color: var(--faint);
}

.live {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  flex: none;
  color: var(--mint);
  font-size: 9.5px;
  font-weight: 500;
  letter-spacing: 0.1em;
}

.live i {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--mint);
  box-shadow: 0 0 8px rgba(155, 232, 215, 0.8);
  animation: breathe 2s ease-in-out infinite;
}

.scene-name {
  flex: 1;
  text-align: center;
  font-family: var(--sans);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.05em;
  color: var(--text);
}

.scene-count {
  flex: none;
  font-size: 8.5px;
  color: #8f899c;
}

.chat {
  flex: 1;
  min-height: 0;
  padding: 20px clamp(30px, 8%, 52px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 12px;
}

.msg {
  font-size: 12px;
  line-height: 1.7;
  max-width: 85%;
}

.msg.user {
  align-self: flex-end;
  padding: 8px 11px;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.07);
  color: #f0ecf3;
}

.msg.ai {
  color: #d6d1de;
}

.tool {
  align-self: flex-start;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 2px;
  padding: 6px 8px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 7px;
  background: rgba(9, 8, 16, 0.4);
  font: 8px/1.3 var(--sans);
  color: var(--muted);
}

.spinner {
  width: 7px;
  height: 7px;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-top-color: var(--peach);
  border-radius: 50%;
  animation: spin 1.2s linear infinite;
}

.composer {
  flex: none;
  min-height: 36px;
  margin: 0 clamp(18px, 5%, 32px) 12px;
  padding: 8px 10px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 9px;
  background: rgba(10, 9, 18, 0.38);
  color: var(--faint);
  font-size: 9px;
}

.send {
  width: 19px;
  height: 19px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.88);
  color: #111018;
  font-size: 10px;
}

.rail {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 3px 4px;
  margin-top: 14px;
}

.rail button {
  min-height: 31px;
  padding: 4px 5px;
  border: 0;
  border-bottom: 2px solid transparent;
  background: transparent;
  color: #d2ccdc;
  font: 11px/1.2 var(--sans);
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: color 0.2s ease, border-color 0.2s ease;
}

.rail button:hover {
  color: #fff;
}

.rail button[aria-pressed="true"] {
  color: #fff;
  border-color: var(--peach);
}

/* ── footer ─────────────────────────────────────────────────── */

.foot {
  width: min(1280px, calc(100% - 80px));
  min-height: 54px;
  margin-inline: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font: 8.5px/1.5 var(--sans);
  letter-spacing: 0.03em;
  color: #8f899c;
  flex: none;
}

.foot p {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 7px;
}

/* ── motion ─────────────────────────────────────────────────── */

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(18px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes breathe {
  0%,
  100% {
    opacity: 1;
  }
  50% {
    opacity: 0.3;
  }
}

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

/* ── responsive ─────────────────────────────────────────────── */

@media (max-width: 1120px) {
  .hero-inner {
    grid-template-columns: minmax(0, 0.84fr) minmax(0, 1.16fr);
    gap: 44px;
  }

  .hero h1 {
    font-size: clamp(54px, 6.2vw, 70px);
  }

  .panel {
    aspect-ratio: 16 / 10;
  }
}

@media (max-width: 940px) {
  .top,
  .hero-inner,
  .foot {
    width: calc(100% - 56px);
  }

  .hero {
    display: block;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 42px;
    padding-block: 38px 54px;
  }

  .copy {
    max-width: 660px;
  }

  .hero h1 {
    font-size: clamp(52px, 8vw, 68px);
  }

  .preview-block {
    width: min(100%, 720px);
  }

  .foot {
    min-height: 50px;
  }
}

@media (max-width: 600px) {
  .top,
  .hero-inner,
  .foot {
    width: calc(100% - 36px);
  }

  .top {
    height: 64px;
  }

  .brand-text {
    font-size: 12.5px;
  }

  .top-right {
    gap: 8px;
  }

  .plugin-tag {
    min-height: 27px;
    padding-inline: 8px;
    font-size: 9.5px;
  }

  .motion {
    width: 38px;
    height: 38px;
  }

  .hero-inner {
    padding-block: 26px 42px;
    gap: 34px;
  }

  .hero h1 {
    margin: 17px 0 18px;
    font-size: clamp(46px, 13.2vw, 58px);
    line-height: 1.1;
  }

  .lead {
    font-size: 12.5px;
    line-height: 1.9;
  }

  .lead br {
    display: none;
  }

  .actions {
    margin-top: 24px;
    flex-wrap: wrap;
    gap: 11px;
  }

  .install {
    min-height: 46px;
    padding-inline: 18px;
    font-size: 11px;
  }

  .free {
    font-size: 10px;
  }

  .install-note {
    padding: 5px 8px;
    font-size: 10px;
    line-height: 1.6;
  }

  .features {
    margin-top: 27px;
    gap: 10px;
  }

  .features li {
    font-size: 11px;
  }

  .panel {
    aspect-ratio: 4 / 3;
    border-radius: 16px;
  }

  .panel-head {
    height: 39px;
    padding-inline: 12px;
  }

  .scene-name {
    font-size: 10px;
  }

  .chat {
    padding: 15px 26px;
    gap: 9px;
  }

  .msg {
    font-size: 10px;
    max-width: 90%;
  }

  .tool {
    font-size: 8px;
  }

  .composer {
    min-height: 33px;
    margin-inline: 16px;
    margin-bottom: 10px;
    font-size: 8.5px;
  }

  .rail {
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    gap: 2px 0;
    margin-top: 12px;
  }

  .rail button {
    min-height: 34px;
    padding: 4px 2px;
    font-size: 9.5px;
    justify-self: stretch;
  }

  .foot {
    display: block;
    padding-block: 15px;
    font-size: 6.5px;
    line-height: 1.8;
  }

  .foot p + p {
    margin-top: 4px;
  }
}

@media (max-width: 390px) {
  .hero h1 {
    font-size: clamp(44px, 13vw, 54px);
  }

  .features {
    max-width: none;
  }

  .rail button {
    font-size: 9px;
    padding-inline: 2px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }

  .copy,
  .preview-block {
    opacity: 1;
    transform: none;
    animation: none;
  }

  .panel canvas {
    transition: none;
  }
}

@media (forced-colors: active) {
  .grad {
    color: CanvasText;
    -webkit-text-fill-color: CanvasText;
    background: none;
  }

  .panel canvas,
  #bgCanvas {
    forced-color-adjust: none;
  }
}