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

:root {
  --ink: #161616;
  --paper: #f6f1e8;
  --white: #fffdf8;
  --red: #ff3f4f;
  --blue: #2458ff;
  --sky: #cfe8ff;
  --yellow: #ffd85c;
  --muted: #716d67;
  --max: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  background: 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;
}

.top {
  width: min(calc(100% - 44px), var(--max));
  min-height: 88px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 48px;
  position: relative;
  z-index: 30;
}

.logo,
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: -.04em;
}

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

.navigation {
  display: flex;
  justify-content: center;
  gap: 31px;
  color: #4f4b46;
  font-size: 14px;
  font-weight: 700;
}

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

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

.top-cta,
.main-download,
.install-button,
.bottom-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--white);
  background: var(--ink);
  border-radius: 999px;
  font-weight: 900;
  transition: transform .2s ease, box-shadow .2s ease;
}

.top-cta {
  min-height: 46px;
  padding: 0 23px;
  font-size: 14px;
}

.top-cta:hover,
.main-download:hover,
.install-button:hover,
.bottom-cta a:hover {
  transform: translateY(-3px);
  box-shadow: 0 20px 38px rgba(22, 22, 22, .18);
}

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

.hero {
  width: min(calc(100% - 44px), 1420px);
  min-height: 720px;
  margin: 24px auto 75px;
  display: grid;
  grid-template-columns: .92fr 1.08fr;
  align-items: center;
  gap: 50px;
  position: relative;
}

.hero::before {
  content: "DOWNLOAD";
  position: absolute;
  left: -85px;
  bottom: 4px;
  color: rgba(36, 88, 255, .055);
  font-size: clamp(120px, 18vw, 280px);
  line-height: .8;
  font-weight: 900;
  letter-spacing: -.08em;
  pointer-events: none;
}

.hero-copy {
  padding-left: clamp(0px, 4vw, 78px);
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-label {
  margin: 0 0 21px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .18em;
  text-transform: uppercase;
}

.section-label.light {
  color: var(--yellow);
}

.hero h1 {
  max-width: 670px;
  margin: 0;
  font-size: clamp(62px, 7.2vw, 106px);
  line-height: .94;
  letter-spacing: -.078em;
  font-weight: 900;
}

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

.lead {
  max-width: 620px;
  margin: 33px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.95;
}

.hero-actions {
  margin-top: 38px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 25px;
}

.main-download {
  min-height: 60px;
  padding: 0 32px;
  background: var(--blue);
  font-size: 16px;
}

.guide-link {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  font-size: 15px;
  font-weight: 900;
}

.guide-link i {
  transition: transform .2s ease;
}

.guide-link:hover i {
  transform: translateX(5px);
}

.systems-note {
  margin: 27px 0 0;
  display: flex;
  flex-wrap: wrap;
  gap: 15px 23px;
  color: #77726b;
  font-size: 13px;
}

.systems-note i {
  margin-right: 6px;
  color: var(--blue);
}

.hero-image {
  min-height: 620px;
  margin: 0;
  display: grid;
  place-items: center;
  position: relative;
}

.hero-image::before {
  content: "";
  position: absolute;
  width: 92%;
  aspect-ratio: 1.25;
  background: var(--sky);
  clip-path: polygon(12% 2%, 88% 0, 100% 21%, 96% 84%, 75% 100%, 8% 92%, 0 61%, 3% 18%);
  transform: rotate(4deg);
}

.hero-image::after {
  content: "";
  position: absolute;
  width: 180px;
  height: 180px;
  right: 6%;
  top: 7%;
  background: var(--yellow);
  border-radius: 50%;
}

.hero-image img {
  width: min(96%, 790px);
  max-height: 590px;
  object-fit: cover;
  position: relative;
  z-index: 2;
  clip-path: polygon(5% 1%, 98% 4%, 94% 96%, 13% 100%, 0 77%, 2% 18%);
  filter: drop-shadow(0 32px 38px rgba(18, 28, 75, .18));
}

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

.download {
  padding: 95px 0 130px;
}

.download-copy {
  max-width: 780px;
}

.download-copy h2,
.advantages-title h2,
.story h2,
.version-heading h2,
.privacy h2,
.install-title h2,
.platform-image h2,
.faq-title h2 {
  margin: 0;
  font-size: clamp(44px, 5.3vw, 76px);
  line-height: 1.07;
  letter-spacing: -.064em;
  font-weight: 900;
}

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

.download-options {
  margin-top: 80px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 46px;
}

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

.download-options > a > span {
  margin-bottom: 29px;
  color: rgba(36, 88, 255, .2);
  font-size: 50px;
  line-height: 1;
  font-weight: 900;
  letter-spacing: -.07em;
}

.download-options > a > i {
  color: var(--blue);
  font-size: 35px;
}

.download-options strong {
  margin-top: 22px;
  font-size: 25px;
  letter-spacing: -.035em;
}

.download-options em {
  margin-top: 8px;
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
}

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

.download-options b i {
  transition: transform .2s ease;
}

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

.advantages {
  min-height: 860px;
  padding: 140px max(22px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: .82fr 1.18fr;
  gap: 95px;
  color: var(--white);
  background:
    radial-gradient(circle at 13% 15%, rgba(255, 63, 79, .24), transparent 22rem),
    var(--blue);
  clip-path: polygon(0 5%, 100% 0, 96% 94%, 12% 100%, 0 90%);
}

.advantage-list {
  display: grid;
  gap: 42px;
}

.advantage-list article > span {
  color: var(--yellow);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .15em;
}

.advantage-list h3 {
  margin: 9px 0 10px;
  font-size: 26px;
  letter-spacing: -.035em;
}

.advantage-list p {
  max-width: 650px;
  margin: 0;
  color: rgba(255,255,255,.72);
  line-height: 1.85;
}

.story {
  padding: 135px 0 145px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 95px;
  align-items: center;
}

.story-mobile {
  padding-top: 40px;
}

.story figure {
  margin: 0;
}

.story figure img {
  width: 100%;
  max-height: 620px;
  object-fit: contain;
  filter: drop-shadow(0 30px 40px rgba(22,22,22,.15));
}

.story-desktop figure img {
  clip-path: ellipse(48% 46% at 50% 50%);
  background: #dbe9ff;
}

.story-mobile figure img {
  clip-path: polygon(11% 1%, 92% 0, 100% 42%, 87% 98%, 15% 100%, 0 61%);
  background: #ffd5db;
}

.story > div > p {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.story ul {
  margin: 42px 0 0;
  padding: 0;
  display: grid;
  gap: 24px;
  list-style: none;
}

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

.story li i {
  margin-top: 5px;
  color: var(--red);
}

.version {
  padding: 135px 0 150px;
}

.version-heading {
  max-width: 840px;
}

.version-points {
  margin-top: 82px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 62px 90px;
}

.version-points p {
  margin: 0;
  display: grid;
  grid-template-columns: 52px 1fr;
  gap: 0 20px;
}

.version-points span {
  grid-row: 1 / span 2;
  color: rgba(255, 63, 79, .22);
  font-size: 48px;
  line-height: .9;
  font-weight: 900;
  letter-spacing: -.06em;
}

.version-points b {
  font-size: 23px;
}

.version-points em {
  margin-top: 10px;
  color: var(--muted);
  font-size: 15px;
  font-style: normal;
  line-height: 1.8;
}

.proof {
  padding: 120px max(22px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 42px;
  background: var(--yellow);
}

.proof strong {
  display: block;
  font-size: clamp(48px, 5.5vw, 80px);
  line-height: 1;
  letter-spacing: -.07em;
}

.proof span {
  display: block;
  margin-top: 13px;
  color: rgba(22,22,22,.68);
  font-size: 14px;
}

.proof > p {
  grid-column: 1 / -1;
  margin: 18px 0 0;
  color: rgba(22,22,22,.58);
  font-size: 12px;
}

.privacy {
  padding: 135px 0 145px;
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 95px;
  align-items: center;
}

.privacy figure {
  margin: 0;
}

.privacy figure img {
  width: 100%;
  max-height: 620px;
  object-fit: contain;
  clip-path: circle(48% at 50% 50%);
  background: #e1e7ff;
  filter: drop-shadow(0 30px 40px rgba(22,22,22,.14));
}

.privacy > div > p {
  margin: 24px 0 0;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.9;
}

.privacy > div > a {
  margin-top: 34px;
  display: inline-flex;
  align-items: center;
  gap: 11px;
  color: var(--blue);
  font-weight: 900;
}

.privacy > div > a i {
  transition: transform .2s ease;
}

.privacy > div > a:hover i {
  transform: translateX(5px);
}

.install {
  padding: 135px 0 150px;
}

.install-title {
  max-width: 760px;
}

.steps {
  margin: 82px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 78px;
  list-style: none;
}

.steps li > span {
  display: block;
  margin-bottom: 29px;
  color: rgba(36, 88, 255, .18);
  font-size: 106px;
  line-height: .75;
  font-weight: 900;
  letter-spacing: -.08em;
}

.steps h3 {
  margin: 0 0 13px;
  font-size: 24px;
}

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

.install-button {
  min-height: 60px;
  margin-top: 58px;
  padding: 0 31px;
  background: var(--red);
}

.platform-image {
  padding: 125px max(22px, calc((100vw - var(--max)) / 2));
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 95px;
  align-items: center;
  color: var(--white);
  background:
    radial-gradient(circle at 10% 20%, rgba(255,216,92,.18), transparent 18rem),
    var(--ink);
}

.platform-image figure {
  margin: 0;
}

.platform-image img {
  width: 100%;
  max-height: 560px;
  object-fit: contain;
  filter: drop-shadow(0 30px 42px rgba(0,0,0,.26));
}

.faq {
  padding: 140px 0 155px;
  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 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: 900;
}

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

.faq-list summary i {
  margin-top: 8px;
  color: var(--blue);
  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;
}

.bottom-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 18% 20%, rgba(255,255,255,.72), transparent 15rem),
    var(--sky);
}

.bottom-cta > p {
  margin: 0 0 17px;
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
  letter-spacing: .16em;
}

.bottom-cta h2 {
  max-width: 920px;
  margin: 0;
  font-size: clamp(52px, 7vw, 98px);
  line-height: 1;
  letter-spacing: -.075em;
  font-weight: 900;
}

.bottom-cta a {
  min-height: 62px;
  margin-top: 40px;
  padding: 0 34px;
  background: var(--blue);
  font-size: 17px;
}

.bottom-cta > span {
  margin-top: 19px;
  color: #5c6677;
  font-size: 13px;
}

.footer {
  width: min(calc(100% - 44px), var(--max));
  min-height: 126px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr auto auto;
  align-items: center;
  gap: 38px;
  color: #77726c;
  font-size: 13px;
}

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

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

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

  .navigation {
    display: none;
    position: fixed;
    inset: 78px 0 auto;
    width: 100%;
    padding: 35px 24px 39px;
    flex-direction: column;
    align-items: center;
    gap: 24px;
    background: rgba(246,241,232,.98);
    backdrop-filter: blur(18px);
  }

  .navigation.is-open {
    display: flex;
  }

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

  .top-cta {
    justify-self: end;
  }

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

  .hero-copy {
    max-width: 820px;
  }

  .hero-image {
    max-width: 860px;
    width: 100%;
    margin: 0 auto;
  }

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

  .advantages,
  .story,
  .privacy,
  .platform-image,
  .faq {
    grid-template-columns: 1fr;
  }

  .advantages {
    clip-path: polygon(0 3%, 100% 0, 97% 97%, 12% 100%, 0 94%);
  }

  .story-mobile figure {
    order: -1;
  }

  .privacy figure {
    max-width: 760px;
    margin: 0 auto;
  }

  .faq-title {
    position: static;
  }
}

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

  .top-cta {
    display: none;
  }

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

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

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

  .hero h1 {
    font-size: clamp(53px, 16vw, 73px);
  }

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

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

  .main-download {
    width: 100%;
  }

  .guide-link {
    justify-content: center;
  }

  .hero-image {
    min-height: 390px;
  }

  .hero-image::before {
    width: 100%;
  }

  .hero-image::after {
    width: 105px;
    height: 105px;
  }

  .hero-image img {
    max-height: 370px;
  }

  .download,
  .story,
  .version,
  .privacy,
  .install,
  .faq {
    padding-top: 84px;
    padding-bottom: 92px;
  }

  .download-options {
    margin-top: 55px;
    grid-template-columns: 1fr;
    gap: 50px;
  }

  .advantages {
    min-height: auto;
    padding-top: 105px;
    padding-bottom: 115px;
    clip-path: polygon(0 2%, 100% 0, 97% 98%, 13% 100%, 0 96%);
  }

  .story {
    gap: 45px;
  }

  .version-points {
    margin-top: 58px;
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .proof {
    grid-template-columns: repeat(2, 1fr);
    gap: 36px 20px;
    padding-top: 90px;
    padding-bottom: 90px;
  }

  .proof strong {
    font-size: 48px;
  }

  .privacy {
    gap: 45px;
  }

  .steps {
    margin-top: 58px;
    grid-template-columns: 1fr;
    gap: 56px;
  }

  .steps li > span {
    margin-bottom: 20px;
    font-size: 78px;
  }

  .install-button {
    width: 100%;
  }

  .platform-image {
    padding-top: 90px;
    padding-bottom: 95px;
    gap: 50px;
  }

  .faq {
    gap: 52px;
  }

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

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

  .bottom-cta h2 {
    font-size: clamp(49px, 14vw, 69px);
  }

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

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

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

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