@import url("https://fonts.googleapis.com/css2?family=Noto+Sans+SC:wght@400;500;600;700;800;900&display=swap");

:root {
  --ink: #171424;
  --muted: #6f6a7c;
  --paper: #fffdf9;
  --pink: #e9418c;
  --purple: #6e47f5;
  --blue: #3087ff;
  --green: #16a16b;
  --dark: #151225;
  --max: 1220px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background:
    radial-gradient(circle at 14% 5%, rgba(110, 71, 245, .10), transparent 27rem),
    radial-gradient(circle at 90% 18%, rgba(233, 65, 140, .10), transparent 30rem),
    var(--paper);
  color: var(--ink);
  font-family: "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

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

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

button {
  font: inherit;
}

.masthead {
  width: min(calc(100% - 44px), var(--max));
  min-height: 90px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 30;
}

.brandmark,
.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.03em;
}

.brandmark img,
.footer-brand img {
  width: 38px;
  height: 38px;
  object-fit: contain;
}

.mainnav {
  display: flex;
  justify-content: center;
  gap: 31px;
  color: #514c5e;
  font-size: 14px;
  font-weight: 600;
}

.mainnav a {
  transition: color .2s ease, transform .2s ease;
}

.mainnav a:hover {
  color: var(--purple);
  transform: translateY(-2px);
}

.header-download,
.primary-download,
.install-button,
.final-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #fff;
  background: var(--ink);
  border-radius: 999px;
  font-weight: 800;
  transition: transform .2s ease, box-shadow .2s ease;
}

.header-download {
  min-height: 46px;
  padding: 0 22px;
  font-size: 14px;
}

.header-download:hover,
.primary-download:hover,
.install-button:hover,
.final-cta a:hover {
  transform: translateY(-3px);
  box-shadow: 0 18px 35px rgba(23, 20, 36, .18);
}

.menu-switch {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  background: transparent;
  color: var(--ink);
  font-size: 20px;
  cursor: pointer;
  border: 0;
}

.hero {
  width: min(calc(100% - 44px), 1380px);
  min-height: 700px;
  margin: 20px auto 75px;
  display: grid;
  grid-template-columns: .93fr 1.07fr;
  align-items: center;
  gap: 55px;
  position: relative;
}

.hero::before {
  content: "";
  position: absolute;
  width: 720px;
  height: 720px;
  right: -220px;
  top: -20px;
  background: radial-gradient(circle, rgba(48, 135, 255, .15), rgba(110, 71, 245, .07) 47%, transparent 70%);
  border-radius: 50%;
  pointer-events: none;
}

.hero-copy {
  padding-left: clamp(0px, 4vw, 76px);
  position: relative;
  z-index: 2;
}

.hero-tag,
.section-label {
  margin: 0 0 20px;
  color: var(--purple);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .16em;
  text-transform: uppercase;
}

.section-label.light {
  color: #c8bdff;
}

.hero h1 {
  max-width: 660px;
  margin: 0;
  font-size: clamp(62px, 7.3vw, 108px);
  line-height: .95;
  letter-spacing: -.075em;
  font-weight: 900;
}

.hero h1 span {
  color: var(--pink);
}

.hero-intro {
  max-width: 610px;
  margin: 32px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.95;
}

.hero-actions {
  margin-top: 37px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 24px;
}

.primary-download {
  min-height: 60px;
  padding: 0 32px;
  font-size: 16px;
}

.text-entry {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 15px;
  font-weight: 800;
}

.text-entry i {
  transition: transform .2s ease;
}

.text-entry:hover i {
  transform: translateX(5px);
}

.hero-meta {
  margin-top: 27px;
  display: flex;
  flex-wrap: wrap;
  gap: 22px;
  color: #777180;
  font-size: 13px;
}

.hero-meta i {
  margin-right: 6px;
  color: var(--purple);
}

.hero-visual {
  margin: 0;
  position: relative;
  z-index: 1;
  transform: translateX(3%);
}

.hero-visual img {
  width: 100%;
  min-height: 480px;
  object-fit: cover;
  object-position: center;
  clip-path: ellipse(49% 47% at 52% 50%);
  filter: drop-shadow(0 38px 44px rgba(44, 37, 77, .16));
}

.systems,
.version,
.sync-story,
.install,
.faq {
  width: min(calc(100% - 44px), var(--max));
  margin-left: auto;
  margin-right: auto;
}

.systems {
  padding: 90px 0 125px;
}

.systems-heading {
  max-width: 760px;
}

.systems-heading h2,
.feature-intro h2,
.version-heading h2,
.sync-copy h2,
.install-title h2,
.download-advice h2,
.faq-title h2 {
  margin: 0;
  font-size: clamp(44px, 5.3vw, 74px);
  line-height: 1.08;
  letter-spacing: -.06em;
  font-weight: 900;
}

.systems-heading > p:last-child,
.feature-intro > p:last-child,
.sync-copy > p,
.version-heading > p:last-child {
  max-width: 720px;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.system-list {
  margin-top: 75px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 44px;
}

.system-list > a {
  display: flex;
  min-width: 0;
  flex-direction: column;
  align-items: flex-start;
}

.system-index {
  margin-bottom: 30px;
  color: rgba(110, 71, 245, .22);
  font-size: 48px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: -.06em;
}

.system-list > a > i {
  color: var(--purple);
  font-size: 34px;
}

.system-list strong {
  margin-top: 22px;
  font-size: 24px;
  letter-spacing: -.03em;
}

.system-list em {
  margin-top: 9px;
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
  line-height: 1.7;
}

.system-list b {
  margin-top: 22px;
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 14px;
}

.system-list b i {
  transition: transform .2s ease;
}

.system-list > a:hover b i {
  transform: translateX(5px);
}

.feature-wave {
  min-height: 900px;
  padding: 135px max(22px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  grid-template-rows: auto 1fr;
  column-gap: 90px;
  color: #fff;
  background:
    radial-gradient(circle at 15% 16%, rgba(112, 83, 255, .48), transparent 27rem),
    radial-gradient(circle at 88% 72%, rgba(233, 65, 140, .34), transparent 30rem),
    var(--dark);
  clip-path: ellipse(85% 50% at 50% 50%);
}

.feature-intro {
  max-width: 670px;
}

.feature-intro > p:last-child {
  color: rgba(255,255,255,.68);
}

.feature-text {
  display: grid;
  align-content: start;
  gap: 38px;
  padding-top: 12px;
}

.feature-text article span {
  color: #c8bdff;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .14em;
}

.feature-text h3 {
  margin: 9px 0 9px;
  font-size: 25px;
  letter-spacing: -.03em;
}

.feature-text p {
  max-width: 620px;
  margin: 0;
  color: rgba(255,255,255,.68);
  line-height: 1.85;
}

.feature-images {
  grid-column: 1 / span 2;
  min-height: 360px;
  margin-top: 35px;
  position: relative;
}

.feature-images img {
  position: absolute;
  width: min(38vw, 470px);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  filter: drop-shadow(0 30px 45px rgba(0,0,0,.25));
}

.feature-connect {
  left: 8%;
  bottom: -125px;
}

.feature-node {
  right: 7%;
  bottom: -60px;
}

.version {
  padding: 175px 0 125px;
}

.version-heading {
  max-width: 830px;
}

.version-main {
  margin-top: 80px;
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 110px;
  align-items: start;
}

.version-number span,
.version-number em {
  display: block;
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
}

.version-number strong {
  display: block;
  margin: 10px 0 13px;
  color: var(--purple);
  font-size: clamp(88px, 13vw, 176px);
  line-height: .85;
  letter-spacing: -.085em;
}

.version-notes {
  display: grid;
  gap: 28px;
  padding-top: 16px;
}

.version-notes p {
  margin: 0;
  display: grid;
  grid-template-columns: 26px 1fr;
  gap: 16px;
  color: var(--muted);
  line-height: 1.8;
}

.version-notes i {
  margin-top: 5px;
  color: var(--green);
}

.version-notes b {
  display: block;
  margin-bottom: 4px;
  color: var(--ink);
}

.store-signals {
  margin-top: 100px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 42px;
}

.store-signals strong {
  display: block;
  font-size: clamp(48px, 5.5vw, 78px);
  line-height: 1;
  letter-spacing: -.065em;
}

.store-signals span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  font-size: 14px;
}

.signal-note {
  margin: 30px 0 0;
  color: #8b8591;
  font-size: 12px;
}

.sync-story {
  padding: 125px 0 140px;
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  gap: 90px;
  align-items: center;
}

.sync-copy ul {
  margin: 44px 0 0;
  padding: 0;
  display: grid;
  gap: 25px;
  list-style: none;
}

.sync-copy li {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 15px;
  color: var(--muted);
  line-height: 1.75;
}

.sync-copy li i {
  margin-top: 5px;
  color: var(--pink);
}

.sync-image {
  margin: 0;
}

.sync-image img {
  width: 100%;
  clip-path: circle(48% at 50% 50%);
  filter: drop-shadow(0 30px 40px rgba(54, 45, 90, .16));
}

.install {
  padding: 125px 0 145px;
}

.install-title {
  max-width: 740px;
}

.install-steps {
  margin: 80px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 75px;
  list-style: none;
}

.install-steps li > span {
  display: block;
  margin-bottom: 30px;
  color: rgba(233, 65, 140, .18);
  font-size: 96px;
  line-height: .78;
  font-weight: 900;
  letter-spacing: -.08em;
}

.install-steps h3 {
  margin: 0 0 13px;
  font-size: 23px;
}

.install-steps p {
  margin: 0;
  color: var(--muted);
  line-height: 1.85;
}

.install-button {
  min-height: 60px;
  margin-top: 56px;
  padding: 0 31px;
}

.download-advice {
  padding: 120px max(22px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: .85fr 1.15fr;
  gap: 100px;
  color: #fff;
  background:
    radial-gradient(circle at 7% 20%, rgba(255,255,255,.13), transparent 16rem),
    linear-gradient(120deg, #4335a9, #7d3bc0 53%, #d23e88);
}

.advice-copy {
  display: grid;
  gap: 28px;
}

.advice-copy p {
  margin: 0;
  color: rgba(255,255,255,.76);
  line-height: 1.85;
}

.advice-copy strong {
  color: #fff;
}

.faq {
  padding: 135px 0 150px;
  display: grid;
  grid-template-columns: .72fr 1.28fr;
  gap: 120px;
  align-items: start;
}

.faq-title {
  position: sticky;
  top: 95px;
}

.faq-list {
  display: grid;
  gap: 34px;
}

.faq-list details {
  padding: 0;
}

.faq-list summary {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
  cursor: pointer;
  list-style: none;
  font-size: 20px;
  line-height: 1.55;
  font-weight: 800;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary i {
  margin-top: 8px;
  color: var(--purple);
  font-size: 14px;
  transition: transform .2s ease;
}

.faq-list details[open] summary i {
  transform: rotate(45deg);
}

.faq-list p {
  max-width: 760px;
  margin: 14px 0 0;
  color: var(--muted);
  line-height: 1.85;
}

.final-cta {
  min-height: 510px;
  padding: 90px 24px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  background:
    radial-gradient(circle at 17% 20%, rgba(255,255,255,.78), transparent 14rem),
    linear-gradient(135deg, #e9f5ff, #f0eaff 48%, #ffe9f3);
}

.final-cta > p {
  margin: 0 0 18px;
  color: var(--purple);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: .14em;
}

.final-cta h2 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(50px, 7vw, 96px);
  line-height: 1;
  letter-spacing: -.07em;
  font-weight: 900;
}

.final-cta a {
  min-height: 62px;
  margin-top: 40px;
  padding: 0 34px;
  font-size: 17px;
}

.final-cta > span {
  margin-top: 19px;
  color: #6f6878;
  font-size: 13px;
}

.footer {
  width: min(calc(100% - 44px), var(--max));
  min-height: 128px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 38px;
  color: #77717e;
  font-size: 13px;
}

.footer-brand {
  color: var(--ink);
  font-size: 18px;
}

.footer-brand img {
  width: 31px;
  height: 31px;
}

@media (max-width: 1040px) {
  .masthead {
    grid-template-columns: auto 1fr auto auto;
    gap: 16px;
  }

  .mainnav {
    display: none;
    position: fixed;
    inset: 78px 0 auto;
    width: 100%;
    padding: 34px 24px 38px;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    background: rgba(255,253,249,.98);
    backdrop-filter: blur(18px);
  }

  .mainnav.open {
    display: flex;
  }

  .menu-switch {
    display: grid;
    place-items: center;
  }

  .header-download {
    justify-self: end;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 55px;
  }

  .hero-copy {
    max-width: 800px;
  }

  .hero-visual {
    max-width: 860px;
    margin: 0 auto;
    transform: none;
  }

  .system-list {
    grid-template-columns: repeat(2, 1fr);
  }

  .feature-wave {
    grid-template-columns: 1fr;
    grid-template-rows: auto;
    clip-path: ellipse(115% 50% at 50% 50%);
  }

  .feature-text {
    margin-top: 58px;
  }

  .feature-images {
    grid-column: 1;
  }

  .feature-images img {
    width: min(48vw, 450px);
  }

  .version-main,
  .sync-story,
  .download-advice,
  .faq {
    grid-template-columns: 1fr;
  }

  .faq-title {
    position: static;
  }
}

@media (max-width: 720px) {
  .masthead {
    width: min(calc(100% - 28px), var(--max));
    min-height: 76px;
    grid-template-columns: auto 1fr auto;
  }

  .header-download {
    display: none;
  }

  .hero,
  .systems,
  .version,
  .sync-story,
  .install,
  .faq,
  .footer {
    width: min(calc(100% - 30px), var(--max));
  }

  .hero {
    margin-top: 0;
    margin-bottom: 35px;
    gap: 38px;
  }

  .hero-copy {
    padding-left: 0;
  }

  .hero h1 {
    font-size: clamp(54px, 16vw, 74px);
  }

  .hero-intro {
    margin-top: 25px;
    font-size: 16px;
    line-height: 1.85;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    gap: 18px;
  }

  .primary-download {
    width: 100%;
  }

  .text-entry {
    justify-content: center;
  }

  .hero-meta {
    gap: 13px 18px;
  }

  .hero-visual img {
    min-height: 330px;
    clip-path: ellipse(55% 48% at 50% 50%);
  }

  .systems,
  .version,
  .sync-story,
  .install,
  .faq {
    padding-top: 82px;
    padding-bottom: 90px;
  }

  .system-list {
    margin-top: 55px;
    grid-template-columns: 1fr;
    gap: 52px;
  }

  .feature-wave {
    min-height: 1020px;
    padding-top: 100px;
    padding-bottom: 120px;
    clip-path: ellipse(155% 50% at 50% 50%);
  }

  .feature-images {
    min-height: 300px;
    margin-top: 30px;
  }

  .feature-images img {
    width: 230px;
  }

  .feature-connect {
    left: -10px;
    bottom: -90px;
  }

  .feature-node {
    right: -5px;
    bottom: -10px;
  }

  .version {
    padding-top: 125px;
  }

  .version-main {
    margin-top: 55px;
    gap: 45px;
  }

  .version-number strong {
    font-size: 84px;
  }

  .store-signals {
    margin-top: 70px;
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 20px;
  }

  .store-signals strong {
    font-size: 48px;
  }

  .sync-story {
    gap: 48px;
  }

  .sync-image {
    order: -1;
  }

  .install-steps {
    margin-top: 55px;
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .install-steps li > span {
    margin-bottom: 20px;
    font-size: 76px;
  }

  .install-button {
    width: 100%;
  }

  .download-advice {
    padding-top: 85px;
    padding-bottom: 90px;
    gap: 50px;
  }

  .faq {
    gap: 52px;
  }

  .faq-list summary {
    font-size: 18px;
  }

  .final-cta {
    min-height: 430px;
    padding: 75px 20px;
  }

  .final-cta h2 {
    font-size: clamp(48px, 14vw, 68px);
  }

  .footer {
    padding: 36px 0;
    grid-template-columns: 1fr;
    gap: 13px;
    text-align: center;
  }

  .footer-brand {
    justify-content: center;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
    animation: none !important;
  }
}