:root {
  --bg: #f7f6fb;
  --ink: #1d2129;
  --mute: #878aab;
  --line: #e8e9f0;
  --pri: #605ce5;
  --pri-2: #4b48d4;
  --pri-soft: #ecebff;
  --blue: #1677ff;
  --mark-from: #6aa8ff;
  --mark-via: #7d82ff;
  --mark-to: #b56eff;
  --t: 0;
  --mx: 50vw;
  --my: 30vh;
  --mxp: 0;
  --myp: 0;
  --font: "Manrope", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --display: "Noto Serif SC", "Songti SC", serif;
  --word: "Sora", "Manrope", "Noto Sans SC", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; width: 100%; }
html {
  color-scheme: light;
  background: var(--bg);
  scroll-behavior: smooth;
  scroll-snap-type: y mandatory;
}

body {
  font-family: var(--font);
  color: var(--ink);
  background:
    radial-gradient(78% 62% at 88% -8%, rgba(255, 228, 240, .55), transparent 58%),
    radial-gradient(70% 58% at 6% 108%, rgba(226, 224, 255, .5), transparent 52%),
    linear-gradient(180deg, #f8f6fb 0%, #f3f2f9 48%, #ececf6 100%);
  overflow-x: hidden;
}

.orbs, .grain, .spot {
  position: fixed;
  inset: 0;
  width: 100vw;
  height: 100dvh;
  pointer-events: none;
  z-index: 0;
}

.orbs {
  transform: translate3d(calc(var(--mxp) * 22px), calc(var(--myp) * 16px), 0);
}

.spot {
  z-index: 1;
  background: radial-gradient(circle at var(--mx) var(--my), rgba(96, 92, 229, .14), transparent 34%);
}

.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(56px);
  will-change: transform;
  opacity: .7;
}

.o1 {
  width: 58vw;
  height: 58vw;
  left: -16vw;
  top: -18vh;
  background: radial-gradient(circle, rgba(226, 224, 255, .9) 0%, transparent 68%);
  animation: drift1 18s ease-in-out infinite;
}
.o2 {
  width: 46vw;
  height: 46vw;
  right: -10vw;
  top: 8vh;
  background: radial-gradient(circle, rgba(255, 228, 240, .7) 0%, transparent 70%);
  animation: drift2 22s ease-in-out infinite;
}
.o3 {
  width: 40vw;
  height: 40vw;
  left: 30vw;
  bottom: -16vh;
  background: radial-gradient(circle, rgba(230, 244, 255, .85) 0%, transparent 68%);
  animation: drift3 16s ease-in-out infinite;
}
.o4 {
  width: 24vw;
  height: 24vw;
  right: 20vw;
  bottom: 10vh;
  background: radial-gradient(circle, rgba(236, 235, 255, .8) 0%, transparent 72%);
  animation: drift1 24s ease-in-out infinite reverse;
}

html[data-stage="listen"] .o1 { opacity: .9; }
html[data-stage="listen"] .o2 { opacity: .4; }
html[data-stage="write"] .o2 { opacity: .85; }
html[data-stage="write"] .o3 { opacity: .45; }
html[data-stage="seal"] .o3 { opacity: .9; }
html[data-stage="seal"] .o4 { opacity: .7; }
html[data-stage="eco"] .o1 { opacity: .55; }
html[data-stage="eco"] .o4 { opacity: .9; }

@keyframes drift1 {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1); }
  50% { transform: translate3d(6%, 8%, 0) scale(1.08); }
}
@keyframes drift2 {
  0%, 100% { transform: translate3d(0, 0, 0) scale(1.04); }
  50% { transform: translate3d(-8%, 5%, 0) scale(.94); }
}
@keyframes drift3 {
  0%, 100% { transform: translate3d(0, 0, 0) scale(.96); }
  50% { transform: translate3d(-5%, -10%, 0) scale(1.1); }
}

.grain {
  z-index: 1;
  opacity: .035;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.top, main, .foot, .progress, .rail { position: relative; z-index: 2; }

.top {
  position: fixed;
  inset: 0 0 auto;
  z-index: 5;
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 14px 28px;
  background: rgba(255, 255, 255, .28);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(16px);
  transition: padding .45s ease, background .45s ease, border-color .45s ease, box-shadow .45s ease;
}
html.scrolled .top {
  padding: 10px 28px;
  background: rgba(255, 255, 255, .86);
  border-bottom-color: rgba(232, 233, 240, .95);
  box-shadow: 0 10px 30px rgba(29, 33, 41, .05);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: inherit;
  text-decoration: none;
}
.brand .mark { transition: transform .5s cubic-bezier(.16, 1, .3, 1); }
.brand:hover .mark { transform: rotate(-8deg) scale(1.06); }
.word { font-family: var(--word); font-size: 15px; font-weight: 700; letter-spacing: -.03em; }
.word i { font-style: normal; font-weight: 800; }
.mark { width: 28px; height: 28px; display: block; }

.top-actions { display: flex; align-items: center; gap: 10px; }

.lang {
  position: relative;
  border: 0;
  background: transparent;
  color: var(--mute);
  font: inherit;
  font-size: 12px;
  cursor: pointer;
  padding: 6px 2px;
}
.lang::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 2px;
  height: 1px;
  background: var(--pri);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}
.lang:hover { color: var(--ink); }
.lang:hover::after { transform: scaleX(1); }

.btn {
  --bx: 0px;
  --by: 0px;
  position: relative;
  isolation: isolate;
  overflow: hidden;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 36px;
  padding: 0 16px;
  border-radius: 999px;
  text-decoration: none;
  font-size: 13px;
  font-weight: 700;
  border: 1px solid transparent;
  transform: translate3d(var(--bx), var(--by), 0);
  transition: transform .18s ease, background .25s ease, box-shadow .25s ease, border-color .25s ease, color .25s ease;
}
.btn::after {
  content: "";
  position: absolute;
  inset: -50% auto -50% -55%;
  width: 42%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, .38), transparent);
  transform: translateX(-30%) skewX(-22deg);
  opacity: 0;
  pointer-events: none;
}
.btn:hover::after {
  opacity: 1;
  animation: sheen .7s ease;
}
@keyframes sheen {
  from { transform: translateX(-40%) skewX(-22deg); }
  to { transform: translateX(420%) skewX(-22deg); }
}
.btn.ghost {
  border-color: var(--line);
  color: var(--ink);
  background: #fff;
}
.btn.ghost:hover {
  border-color: #c9c4f0;
  background: var(--pri-soft);
  color: var(--pri);
  box-shadow: 0 10px 24px rgba(96, 92, 229, .12);
}
.btn.solid {
  background: var(--pri);
  color: #fff;
  box-shadow: 0 8px 20px rgba(96, 92, 229, .22);
}
.btn.solid:hover {
  background: var(--pri-2);
  box-shadow: 0 14px 32px rgba(96, 92, 229, .32);
}
.btn:active { transform: translate3d(var(--bx), var(--by), 0) scale(.97); }
.btn.lg { height: 52px; padding: 0 26px; font-size: 16px; }
.btn:focus-visible, .lang:focus-visible { outline: 2px solid var(--pri); outline-offset: 3px; }

.scene {
  --p: 0;
  height: 100dvh;
  min-height: 100dvh;
  scroll-snap-align: start;
  scroll-snap-stop: always;
}

.rise {
  --from: 0;
  --span: 0.18;
  opacity: clamp(0, calc((var(--p) - var(--from)) / var(--span)), 1);
  will-change: opacity;
}

.hero {
  position: relative;
  width: 100vw;
  min-height: 100dvh;
  padding: 12vh 48px 8vh clamp(80px, 12vw, 220px);
  display: grid;
  align-items: stretch;
  overflow: hidden;
}

.hero-bg {
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-bg-video {
  display: block;
  position: absolute;
  top: 0;
  right: 0;
  width: 114%;
  height: 100%;
  object-fit: cover;
  object-position: 100% 50%;
  transform: scale(1.02) translate3d(calc(var(--mxp) * -6px), calc(var(--myp) * -4px), 0);
  transform-origin: 100% 50%;
  background: #f7f6fb;
}

.hero-wash {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, #f7f6fb 0%, #f7f6fb 26%, rgba(247, 246, 251, .88) 36%, rgba(247, 246, 251, .22) 48%, transparent 60%),
    linear-gradient(180deg, rgba(247, 246, 251, .22) 0%, transparent 16%, transparent 86%, rgba(247, 246, 251, .3) 100%);
  transition: background .45s ease;
}
html:not([data-stage="hero"]) .hero-wash {
  background:
    linear-gradient(90deg, #f7f6fb 0%, #f7f6fb 28%, rgba(247, 246, 251, .86) 38%, rgba(247, 246, 251, .2) 50%, transparent 62%),
    linear-gradient(180deg, rgba(247, 246, 251, .18) 0%, transparent 14%, transparent 86%, rgba(247, 246, 251, .28) 100%);
}
html[data-stage="eco"] .hero-wash {
  background: #f7f6fb;
}

.hero-copy-col {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  align-self: stretch;
  width: min(560px, 100%);
  max-width: 560px;
  min-height: calc(100dvh - 20vh);
  padding-bottom: 2vh;
}

.hero-brand,
.hero-desc,
.hero-actions {
  max-width: 520px;
}

.tag {
  margin: 0 0 12px;
  font-size: 13px;
  letter-spacing: .28em;
  text-transform: uppercase;
  color: var(--pri);
}

.title { margin: 0; line-height: .92; }
.title-en {
  display: block;
  font-family: var(--word);
  font-size: clamp(48px, 7.2vw, 84px);
  font-weight: 700;
  letter-spacing: -.06em;
  color: #181818;
}
.title-zh {
  display: block;
  font-family: var(--display);
  font-size: clamp(44px, 6.4vw, 76px);
  font-weight: 700;
  letter-spacing: .06em;
  background: linear-gradient(100deg, var(--mark-from), var(--mark-via) 52%, var(--mark-to));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.lead,
.lead-2 {
  max-width: 28em;
  margin: 0;
  font-size: clamp(17px, 1.7vw, 22px);
  font-weight: 500;
  line-height: 1.7;
  color: #4e5969;
}
.lead { margin-bottom: 8px; }

.pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}
.pills li {
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 13px;
  color: var(--pri);
  background: var(--pri-soft);
  border: 1px solid transparent;
  transition: transform .3s cubic-bezier(.16, 1, .3, 1), background .25s ease, box-shadow .25s ease;
}
.pills li:hover {
  transform: translateY(-3px);
  background: #e3e1ff;
  box-shadow: 0 8px 18px rgba(96, 92, 229, .12);
}

.pin {
  width: 100vw;
  overflow: hidden;
}
.sticky {
  position: relative;
  width: 100vw;
  height: 100%;
  overflow: hidden;
}

.split {
  display: grid;
  grid-template-columns: minmax(280px, 520px) minmax(0, 1fr);
  align-items: center;
  height: 100%;
  padding: 12vh 0 10vh clamp(32px, 8vw, 160px);
  box-sizing: border-box;
}
.stage.live,
.stage.talk,
.stage.mins { display: none; }

.copy {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 0 40px 0 48px;
  background: linear-gradient(90deg, rgba(247, 246, 251, .78), rgba(247, 246, 251, .2) 78%, transparent);
}

.idx {
  margin: 0 0 8px;
  font-family: var(--display);
  font-size: clamp(40px, 5vw, 64px);
  line-height: 1;
  letter-spacing: -.06em;
  color: rgba(96, 92, 229, .12);
}

.copy h2 {
  margin: 0 0 20px;
  font-family: var(--display);
  font-size: clamp(32px, 4.4vw, 56px);
  line-height: 1.15;
}
.copy p {
  margin: 0 0 12px;
  font-size: 16px;
  line-height: 1.7;
  color: var(--mute);
}
.copy .late { margin-top: 22px; align-self: flex-start; }

.stage {
  display: flex;
  flex-direction: column;
  justify-content: flex-start;
  padding: 8px 48px 0 16px;
}

.stage-kicker {
  margin: 0 0 16px;
  font-size: 12px;
  letter-spacing: .4em;
  color: var(--blue);
}

.feed {
  margin: 0;
  padding: 0;
  list-style: none;
  display: flex;
  flex-direction: column;
}
.feed li {
  overflow: hidden;
  max-height: 0;
  margin: 0;
  font-size: clamp(20px, 2.6vw, 32px);
  line-height: 1.35;
  color: var(--ink);
  opacity: 0;
  transform: translate3d(0, 14px, 0);
  filter: blur(3px);
}
.feed li.show {
  max-height: 4.2em;
  margin: 0 0 18px;
  opacity: 1;
  transform: none;
  filter: none;
  transition:
    opacity .7s cubic-bezier(.16, 1, .3, 1),
    transform .8s cubic-bezier(.16, 1, .3, 1),
    filter .7s ease,
    max-height .7s cubic-bezier(.16, 1, .3, 1),
    margin .7s cubic-bezier(.16, 1, .3, 1);
}
.feed li.leave {
  max-height: 0;
  margin: 0;
  opacity: 0;
  transform: translate3d(0, -10px, 0);
  filter: blur(4px);
}
.feed li em {
  font-style: normal;
  margin-right: 12px;
  color: var(--blue);
  font-size: .55em;
}
.feed-txt { white-space: pre-wrap; }
.feed li.typing .feed-txt::after {
  content: "";
  display: inline-block;
  width: 2px;
  height: .82em;
  margin-left: 3px;
  background: var(--blue);
  vertical-align: -0.06em;
  animation: caret .85s step-end infinite;
}
@keyframes caret {
  50% { opacity: 0; }
}

.talk { gap: 18px; }
.line {
  padding: 22px 24px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 8px 28px rgba(17, 24, 39, .06);
  transition: box-shadow .35s ease, border-color .35s ease, background .35s ease;
}
.line:hover {
  border-color: #d7d3f2;
  box-shadow: 0 16px 36px rgba(96, 92, 229, .1);
}
.line b { display: block; margin-bottom: 8px; font-size: 13px; letter-spacing: .12em; }
.line span { font-size: clamp(18px, 2.1vw, 26px); line-height: 1.45; }
.line.a { border-left: 4px solid var(--blue); }
.line.a b { color: var(--blue); }
.line.b { border-left: 4px solid var(--pri); }
.line.b b { color: var(--pri); }

.mins {
  padding-right: 56px;
}
.mins-title {
  margin: 0 0 18px;
  font-size: 14px;
  letter-spacing: .16em;
  color: var(--pri);
}
.mins ul { margin: 0; padding: 0; list-style: none; }
.mins li {
  position: relative;
  padding: 16px 0 16px 36px;
  font-size: clamp(18px, 2vw, 24px);
  border-bottom: 1px solid var(--line);
}
.mins li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 1.15em;
  width: 16px;
  height: 16px;
  border-radius: 4px;
  border: 2px solid #c9cdd4;
  background: #fff;
}
.mins li.on::before {
  background: var(--pri);
  border-color: var(--pri);
  box-shadow: 0 0 0 4px rgba(96, 92, 229, .12);
}
.mins li {
  transition: color .3s ease, padding-left .3s ease;
}
.mins li:hover { color: var(--pri); }

.stage.agent {
  gap: 14px;
  min-height: 62vh;
  padding: 8px 40px 24px 8px;
}
.handoff {
  padding: 22px 24px;
  border-radius: 16px;
  background: #fff;
  border: 1px solid var(--line);
  box-shadow: 0 8px 28px rgba(17, 24, 39, .06);
}
.handoff b { display: block; margin-bottom: 8px; font-size: 13px; letter-spacing: .12em; }
.handoff span { font-size: clamp(16px, 1.8vw, 22px); line-height: 1.45; }
.handoff.from { border-left: 4px solid var(--blue); }
.handoff.from b { color: var(--blue); }
.handoff.to { border-left: 4px solid var(--pri); }
.handoff.to b { color: var(--pri); }
.handoff.msg {
  background: var(--pri-soft);
  border-color: #d7d3f2;
}
.handoff.msg b { color: var(--pri); }
.handoff-dir {
  margin: 0;
  font-size: 12px;
  letter-spacing: .22em;
  color: var(--pri);
}

.foot {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
  padding: 20px 28px 28px;
  color: #86909c;
  font-size: 12px;
  background: linear-gradient(180deg, transparent, rgba(247, 246, 251, .88) 36%);
  scroll-snap-align: end;
}
.foot .legal {
  display: flex;
  gap: 16px;
}
.foot .meta {
  display: grid;
  gap: 4px;
  text-align: right;
}
.foot .meta p { margin: 0; }
.foot a {
  position: relative;
  color: inherit;
  text-decoration: none;
}
.foot a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -2px;
  height: 1px;
  background: currentColor;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .3s ease;
}
.foot a:hover { color: var(--ink); }
.foot a:hover::after { transform: scaleX(1); }

.hint {
  position: absolute;
  z-index: 2;
  left: clamp(80px, 12vw, 220px);
  bottom: 28px;
  border: 0;
  background: transparent;
  color: var(--mute);
  font: inherit;
  font-size: 12px;
  letter-spacing: .18em;
  cursor: pointer;
  opacity: var(--p);
}
.hint::after {
  content: "";
  display: block;
  width: 1px;
  height: 28px;
  margin: 8px auto 0;
  background: linear-gradient(180deg, var(--pri), transparent);
  animation: drip 1.8s ease-in-out infinite;
}
@keyframes drip {
  0%, 100% { transform: scaleY(.45); opacity: .35; }
  50% { transform: scaleY(1); opacity: 1; }
}

.rail { display: none; }

.progress {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 6;
  height: 3px;
}
.progress i {
  display: block;
  height: 100%;
  width: calc(var(--t) * 100%);
  background: linear-gradient(90deg, var(--mark-from), var(--pri));
}

@media (max-width: 860px) {
  .split { grid-template-columns: 1fr; }
  .copy, .stage { padding: 0 20px; }
  .split { padding: 12vh 0 8vh; }
  .hero { padding: 14vh 20px 8vh; align-items: stretch; }
  .hero-bg-video { width: 100%; object-position: 100% 40%; }
  .hint { left: 20px; }
  .hero-copy-col { min-height: calc(100dvh - 22vh); }
  .hero-wash {
    background:
      linear-gradient(180deg, rgba(247, 246, 251, .42) 0%, rgba(247, 246, 251, .2) 28%, rgba(247, 246, 251, .72) 62%, rgba(247, 246, 251, .94) 100%);
  }
  .hero-copy-col { max-width: none; }
  .mins { padding-right: 0; }
  .btn.ghost { display: none; }
  .rail, .hint { display: none; }
  .foot {
    flex-direction: column;
    align-items: flex-start;
  }
  .foot .meta { text-align: left; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-snap-type: none; }
  .orb, .hint::after, .feed li.typing .feed-txt::after { animation: none; }
  .hero-bg-video { transform: none; }
  .rise, .feed li, .line, .mins li, .handoff, .sticky, .copy, .stage {
    opacity: 1;
    transform: none;
    filter: none;
  }
  .btn { transform: none; }
}