:root {
  --ink: #0b1c2c;
  --mute: #4d667a;
  --line: rgba(11, 28, 44, 0.12);
  --paper: #f4f9fc;
  --sky: #1f9ad8;
  --sky-2: #0d6fa8;
  --mint: #1eaa78;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
  --display: "Syne", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --body: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
  --pad: clamp(1rem, 4vw, 2.5rem);
  --max: 1180px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--body);
  line-height: 1.65;
  background: var(--paper);
  overflow-x: hidden;
}
body.has-cursor { cursor: none; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; background: none; border: 0; cursor: pointer; }

.skip {
  position: absolute; left: -999px; top: 0; z-index: 9999;
  background: #000; color: #fff; padding: .6rem 1rem;
}
.skip:focus { left: 1rem; top: 1rem; }

.cursor, .cursor-dot {
  position: fixed; top: 0; left: 0; pointer-events: none; z-index: 9998;
  border-radius: 50%; transform: translate(-50%, -50%);
  opacity: 0; transition: opacity .3s;
}
.cursor {
  width: 42px; height: 42px;
  border: 1px solid rgba(31, 154, 216, .55);
  mix-blend-mode: multiply;
}
.cursor-dot {
  width: 6px; height: 6px; background: var(--sky);
}
body.has-cursor .cursor,
body.has-cursor .cursor-dot { opacity: 1; }
.cursor.is-hot {
  width: 64px; height: 64px;
  background: rgba(31, 154, 216, .12);
  border-color: transparent;
}

.eyebrow {
  margin: 0 0 .6rem;
  font-family: var(--display);
  font-size: .78rem;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--sky-2);
  font-weight: 700;
}

/* NAV */
.nav {
  position: fixed; inset: 0 0 auto; z-index: 40;
  padding: .85rem var(--pad);
  transition: background .35s var(--ease), backdrop-filter .35s;
}
.nav.is-on {
  background: rgba(244, 249, 252, .78);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
}
.nav__bar {
  max-width: var(--max); margin: 0 auto;
  display: flex; align-items: center; gap: 1rem;
}
.nav__brand {
  display: inline-flex; align-items: center; gap: .55rem;
  font-family: var(--display); font-weight: 800; font-size: 1.1rem;
  letter-spacing: .04em; margin-right: auto;
}
.nav__brand img { border-radius: 10px; box-shadow: 0 8px 20px rgba(13, 111, 168, .25); }
.nav__links { display: flex; gap: 1.1rem; }
.nav__links a {
  font-size: .9rem; color: var(--mute); font-weight: 500;
  transition: color .2s;
}
.nav__links a:hover { color: var(--ink); }
.nav__dl {
  display: inline-flex; align-items: center; justify-content: center;
  padding: .55rem 1rem; border-radius: 999px;
  background: linear-gradient(135deg, var(--sky), var(--sky-2));
  color: #fff; font-weight: 700; font-size: .88rem;
  box-shadow: 0 12px 28px rgba(13, 111, 168, .28);
}
.nav__burger {
  display: none; width: 42px; height: 42px; place-items: center;
  border: 1px solid var(--line); border-radius: 12px; background: #fff;
}
.nav__burger span,
.nav__burger span::before,
.nav__burger span::after {
  display: block; width: 18px; height: 2px; background: var(--ink); position: relative;
}
.nav__burger span::before,
.nav__burger span::after {
  content: ""; position: absolute; left: 0;
}
.nav__burger span::before { top: -6px; }
.nav__burger span::after { top: 6px; }

/* HERO */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  padding: 6.5rem var(--pad) 3.5rem;
  overflow: hidden;
  color: var(--ink);
  background:
    radial-gradient(900px 420px at 15% 20%, rgba(31, 154, 216, .22), transparent 60%),
    radial-gradient(700px 360px at 90% 10%, rgba(30, 170, 120, .1), transparent 55%),
    linear-gradient(180deg, #e7f5fc 0%, #f4f9fc 55%, #ffffff 100%);
}
.hero__canvas {
  position: absolute; inset: 0; width: 100%; height: 100%;
  pointer-events: none; opacity: .55;
}
.hero__orbit {
  position: absolute;
  width: 60vmax; height: 60vmax;
  right: -20vmax; top: -24vmax;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(31, 154, 216, .28), transparent 62%);
  filter: blur(10px);
  animation: orbitPulse 8s ease-in-out infinite;
}
@keyframes orbitPulse {
  0%, 100% { transform: scale(1); opacity: .7; }
  50% { transform: scale(1.08); opacity: 1; }
}

.hero__layout {
  position: relative;
  z-index: 2;
  width: min(var(--max), 100%);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.08fr minmax(300px, 0.92fr);
  gap: clamp(2rem, 5vw, 4rem);
  align-items: center;
  padding-inline: 0;
}

.hero__device {
  width: min(400px, 100%);
  justify-self: end;
  perspective: 1000px;
}
.device {
  position: relative;
  border-radius: 28px;
  overflow: hidden;
  background: transparent;
  transform-style: preserve-3d;
  box-shadow:
    0 28px 60px rgba(11, 28, 44, .18),
    0 0 0 10px rgba(255, 255, 255, .75);
  transition: transform .15s linear;
}
.device img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: contain;
  object-position: center;
}
.device__glare {
  position: absolute; inset: 0; z-index: 2; pointer-events: none;
  background: linear-gradient(115deg, rgba(255,255,255,.2), transparent 42%, transparent 58%, rgba(255,255,255,.06));
  mix-blend-mode: screen;
}

.hero__frame {
  position: relative;
  max-width: 620px;
  justify-self: start;
}
.hero__brand {
  margin: 0;
  font-family: var(--display);
  font-weight: 800;
  font-size: clamp(4.2rem, 11vw, 7.6rem);
  line-height: .92;
  letter-spacing: .06em;
  color: var(--sky-2);
  text-shadow: 0 16px 40px rgba(13, 111, 168, .18);
}
.hero__brand .ch {
  display: inline-block;
  opacity: 0;
  transform: translateY(40%) rotate(6deg);
  animation: charIn .8s var(--ease) forwards;
}
@keyframes charIn {
  to { opacity: 1; transform: none; }
}
.hero h1 {
  margin: 1.25rem 0 0;
  font-size: clamp(1.55rem, 3.2vw, 2.35rem);
  font-weight: 700;
  line-height: 1.35;
  max-width: 14em;
  color: var(--ink);
}
.hero__lead {
  margin: 1.15rem 0 0;
  color: var(--mute);
  max-width: 36rem;
  font-size: clamp(1.05rem, 1.5vw, 1.18rem);
  line-height: 1.75;
}
.hero__extra {
  margin: .55rem 0 0;
  color: var(--mute);
  max-width: 36rem;
  font-size: clamp(1rem, 1.35vw, 1.1rem);
  line-height: 1.7;
}
.hero__cta {
  display: flex; flex-wrap: wrap; gap: .75rem;
  margin-top: 1.85rem;
}

.btn {
  display: inline-flex; align-items: center; gap: .65rem;
  min-height: 52px; padding: .75rem 1.35rem;
  border-radius: 999px; font-weight: 700;
  transition: transform .25s var(--ease), box-shadow .25s;
}
.btn i {
  width: 10px; height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(-45deg); translate: 0 1px;
}
.btn--solid {
  color: #fff;
  background: linear-gradient(135deg, #2eb0e8, #0d6fa8);
  box-shadow: 0 18px 40px rgba(13, 111, 168, .4);
}
.btn--solid:hover { transform: translateY(-2px); }
.btn--line {
  color: var(--ink);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .7);
}
.btn--xl {
  min-height: 60px;
  padding-inline: 1.8rem;
  font-size: 1.05rem;
}

.hero__scroll {
  position: absolute; left: var(--pad); bottom: 1.4rem; z-index: 2;
  font-size: .75rem; letter-spacing: .2em; color: var(--mute);
  font-family: var(--display);
}
.hero__scroll span {
  display: inline-block;
  animation: bob 1.8s ease-in-out infinite;
}
@keyframes bob {
  0%, 100% { transform: translateY(0); opacity: .55; }
  50% { transform: translateY(6px); opacity: 1; }
}

/* TICKER */
.ticker {
  width: 100%;
  border-block: 1px solid var(--line);
  background: #fff;
  padding: .95rem 0;
  overflow: hidden;
}
.ticker__track {
  display: flex;
  width: max-content;
  gap: 2.5rem;
  align-items: center;
  font-family: var(--display);
  font-weight: 700;
  letter-spacing: .08em;
  color: var(--sky-2);
  font-size: .92rem;
  animation: marquee 32s linear infinite;
}
.ticker__track span {
  flex: 0 0 auto;
  white-space: nowrap;
}
.ticker__track span::before {
  content: "✦";
  margin-right: .55rem;
  color: var(--mint);
}
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* STORY */
.story {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 2rem;
  max-width: var(--max);
  margin: 0 auto;
  padding: 5.5rem var(--pad);
}
.story__sticky {
  position: sticky; top: 6.5rem; align-self: start;
}
.story h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.7rem, 3.4vw, 2.6rem);
  line-height: 1.15;
  letter-spacing: -.01em;
}
.story__sticky > p:last-of-type {
  margin: 1rem 0 0;
  color: var(--mute);
  max-width: 34ch;
}
.meta {
  margin: 1.8rem 0 0;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: .85rem 1rem;
}
.meta div {
  padding-top: .75rem;
  border-top: 1px solid var(--line);
}
.meta dt { font-size: .78rem; color: var(--mute); }
.meta dd { margin: .15rem 0 0; font-weight: 700; }

.story__rail {
  display: grid; gap: 1rem;
}
.story__rail article {
  padding: 1.6rem 1.4rem 1.7rem;
  border-left: 3px solid var(--sky);
  background:
    linear-gradient(90deg, rgba(31, 154, 216, .08), transparent 55%);
  transform: translateX(24px);
  opacity: 0;
  transition: transform .7s var(--ease), opacity .7s var(--ease);
}
.story__rail article.is-in {
  transform: none; opacity: 1;
}
.story__rail h3 {
  margin: 0 0 .45rem;
  font-size: 1.2rem;
}
.story__rail p {
  margin: 0; color: var(--mute);
}

/* FLOW */
.flow {
  padding: 2rem var(--pad) 5rem;
  max-width: var(--max);
  margin: 0 auto;
  box-sizing: border-box;
}
.flow__head { max-width: 28rem; margin-bottom: 2rem; }
.flow__head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  line-height: 1.2;
}
.flow__list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0;
  border-top: 1px solid var(--line);
}
.flow__row {
  display: grid;
  grid-template-columns: 5.5rem 1fr;
  gap: 1rem;
  align-items: baseline;
  padding: 1.35rem 1.25rem;
  border-bottom: 1px solid var(--line);
  transition: background .25s, padding-left .25s var(--ease);
}
.flow__row:nth-child(odd) { border-right: 1px solid var(--line); }
.flow__row:hover {
  background: rgba(31, 154, 216, .05);
}
.flow__row strong {
  font-family: var(--display);
  font-size: 1.15rem;
  color: var(--sky-2);
}
.flow__row p { margin: 0; color: var(--mute); }

/* SCREEN runway */
.screen {
  padding: 4.5rem 0 2rem;
  background:
    radial-gradient(800px 300px at 20% 0%, rgba(31,154,216,.12), transparent),
    #eaf4fa;
}
.screen__head {
  max-width: var(--max);
  margin: 0 auto 1.5rem;
  padding: 0 var(--pad);
}
.screen__head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.55rem, 3vw, 2.25rem);
}
.screen__head p { margin: .7rem 0 0; color: var(--mute); max-width: 40rem; }

.runway {
  display: flex; gap: 1.25rem;
  overflow-x: auto;
  padding: 1rem var(--pad) 2.5rem;
  scroll-snap-type: x mandatory;
  -webkit-overflow-scrolling: touch;
  cursor: grab;
  scrollbar-width: none;
  justify-content: safe center;
}
.runway::-webkit-scrollbar { display: none; }
.runway.is-drag { cursor: grabbing; }
.runway figure {
  margin: 0;
  flex: 0 0 min(260px, 72vw);
  scroll-snap-align: center;
  text-align: center;
  transition: transform .35s var(--ease);
}
.runway figure:hover { transform: translateY(-8px); }
.runway img {
  width: 100%;
  height: auto;
  margin: 0 auto;
  display: block;
  object-fit: contain;
  object-position: center;
  border-radius: 28px;
  box-shadow: 0 24px 50px rgba(11, 28, 44, .18);
}
.runway figcaption {
  margin-top: .7rem;
  text-align: center;
  color: var(--mute);
  font-size: .88rem;
}

/* GET */
.get {
  position: relative;
  padding: 6rem var(--pad);
  overflow: hidden;
  background: #071824;
  color: #fff;
  text-align: center;
}
.get__glow {
  position: absolute;
  inset: 20% 20% auto;
  height: 40%;
  background: radial-gradient(circle, rgba(31,154,216,.45), transparent 70%);
  filter: blur(20px);
  animation: orbitPulse 6s ease-in-out infinite;
}
.get__inner {
  position: relative; z-index: 1;
  max-width: 640px; margin: 0 auto;
}
.get h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  line-height: 1.15;
}
.get__inner > p {
  margin: 1rem auto 0;
  color: rgba(255,255,255,.7);
  max-width: 36rem;
}
.get .btn { margin-top: 1.8rem; }
.get__notes {
  list-style: none;
  margin: 1.8rem 0 0;
  padding: 0;
  display: grid;
  gap: .55rem;
  color: rgba(255,255,255,.62);
  font-size: .92rem;
}
.get__notes li::before {
  content: "— ";
  color: var(--sky);
}

/* VOICE */
.voice {
  max-width: var(--max);
  margin: 0 auto;
  padding: 5rem var(--pad);
}
.voice > header { margin-bottom: 1.75rem; }
.voice h2 {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.55rem, 3vw, 2.2rem);
}
.voice__feed {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.bubble {
  padding: 1.15rem 1.2rem 1.25rem;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 22px 22px 22px 6px;
  box-shadow: 0 10px 30px rgba(11, 28, 44, .04);
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s var(--ease), transform .6s var(--ease);
  transition-delay: calc(var(--d) * 70ms);
}
.bubble.is-in { opacity: 1; transform: none; }
.bubble header {
  display: flex; align-items: center; gap: .7rem;
  margin-bottom: .65rem;
}
.bubble b { display: block; font-size: .92rem; }
.bubble time { color: var(--mute); font-size: .78rem; }
.bubble p { margin: 0; font-size: .95rem; }
.ava {
  width: 40px; height: 40px; border-radius: 50%;
  display: grid; place-items: center;
  color: #fff; font-weight: 700; flex-shrink: 0;
}
.ava[data-t="1"] { background: #1f9ad8; }
.ava[data-t="2"] { background: #1eaa78; }
.ava[data-t="3"] { background: #3d7dde; }
.ava[data-t="4"] { background: #d8893a; }
.ava[data-t="5"] { background: #4f7f98; }
.ava[data-t="6"] { background: #2f9e96; }

/* FAQ */
.faq {
  max-width: 760px;
  margin: 0 auto;
  padding: 1rem var(--pad) 5rem;
}
.faq h2 {
  margin: 0 0 1.25rem;
  font-family: var(--display);
  font-size: clamp(1.45rem, 2.8vw, 2rem);
}
.faq details {
  border-bottom: 1px solid var(--line);
  padding: .35rem 0 .9rem;
}
.faq summary {
  cursor: pointer; list-style: none;
  font-weight: 700; padding: .7rem 0;
  font-family: var(--display);
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; float: right; color: var(--sky);
}
.faq details[open] summary::after { content: "–"; }
.faq p { margin: 0; color: var(--mute); }

/* FOOT */
.foot {
  background: #041018;
  color: rgba(255,255,255,.7);
  padding: 2.4rem var(--pad) 2.6rem;
}
.foot__row {
  max-width: var(--max); margin: 0 auto;
  display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap;
  align-items: center;
}
.foot__brand {
  display: flex; gap: .75rem; align-items: center;
}
.foot__brand img { border-radius: 11px; }
.foot__brand strong {
  display: block; color: #fff;
  font-family: var(--display); font-size: 1.05rem;
}
.foot__brand span { font-size: .85rem; }
.foot nav { display: flex; gap: 1.1rem; }
.foot nav a { color: rgba(255,255,255,.75); }
.foot nav a:hover { color: #fff; }
.foot__copy {
  max-width: var(--max); margin: 1.2rem auto 0;
  font-size: .82rem; color: rgba(255,255,255,.45);
}

@media (max-width: 960px) {
  .hero__layout { grid-template-columns: 1fr; }
  .hero__device { display: none; }
  .story { grid-template-columns: 1fr; }
  .story__sticky { position: static; }
  .flow__list { grid-template-columns: 1fr; }
  .flow__row:nth-child(odd) { border-right: 0; }
  .voice__feed { grid-template-columns: 1fr; }
}

@media (max-width: 780px) {
  body.has-cursor { cursor: auto; }
  .cursor, .cursor-dot { display: none; }
  .nav__burger { display: grid; }
  .nav__links {
    display: none;
    position: absolute; left: var(--pad); right: var(--pad); top: 64px;
    flex-direction: column; gap: .2rem;
    padding: .7rem; border-radius: 16px;
    background: rgba(255,255,255,.96);
    border: 1px solid var(--line);
    box-shadow: 0 18px 40px rgba(11,28,44,.12);
  }
  .nav__links.is-open { display: flex; }
  .nav__links a { padding: .7rem .8rem; border-radius: 10px; color: var(--ink); }
  .nav__dl { display: none; }
  .hero {
    padding-top: 5.8rem;
    padding-bottom: 3.2rem;
    min-height: auto;
  }
  .hero__layout { gap: 1.75rem; }
  .hero__device { display: none; }
  .hero h1 { max-width: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    transition-duration: .01ms !important;
  }
  .ticker__track { animation: none; }
}