:root {
  --blue: #0053cc;
  --blue-dark: #073a95;
  --blue-soft: #edf4ff;
  --orange: #ffa90a;
  --green: #39d77d;
  --ink: #172033;
  --muted: #667085;
  --line: #e7edf5;
  --surface: #ffffff;
  --background: #f7faff;
  --shadow: 0 24px 70px rgba(22, 62, 125, 0.13);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--ink);
  background: var(--background);
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    radial-gradient(circle at 85% 7%, rgba(0, 83, 204, 0.12), transparent 28%),
    radial-gradient(circle at 8% 34%, rgba(255, 169, 10, 0.09), transparent 22%);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(1180px, calc(100% - 48px));
  height: 76px;
  margin: 14px auto 0;
  padding: 0 20px;
  background: rgba(255, 255, 255, 0.88);
  border: 1px solid rgba(218, 228, 242, 0.82);
  border-radius: 20px;
  box-shadow: 0 12px 40px rgba(29, 65, 117, 0.08);
  backdrop-filter: blur(18px);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  width: max-content;
  font-size: 18px;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.brand img {
  border-radius: 12px;
  box-shadow: 0 8px 22px rgba(0, 83, 204, 0.19);
}

.desktop-nav {
  display: flex;
  gap: 34px;
  color: #475467;
  font-size: 14px;
  font-weight: 600;
}

.desktop-nav a,
.header-download {
  transition: color 0.2s ease, transform 0.2s ease, background 0.2s ease;
}

.desktop-nav a:hover {
  color: var(--blue);
}

.header-download {
  justify-self: end;
  padding: 11px 18px;
  color: #fff;
  background: var(--blue);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 700;
}

.header-download:hover {
  background: var(--blue-dark);
  transform: translateY(-1px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(380px, 0.95fr);
  gap: 72px;
  align-items: center;
  width: min(1120px, calc(100% - 48px));
  min-height: 720px;
  margin: 0 auto;
  padding: 74px 0 96px;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

.eyebrow,
.section-kicker,
.section-heading > p {
  margin: 0 0 18px;
  color: var(--blue);
  font-size: 14px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

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

.eyebrow span {
  width: 28px;
  height: 3px;
  background: var(--orange);
  border-radius: 99px;
}

.hero h1 {
  margin: 0;
  color: #182033;
  font-size: clamp(46px, 5vw, 70px);
  line-height: 1.14;
  letter-spacing: -0.05em;
}

.hero h1 strong {
  color: var(--blue);
  font-weight: 900;
}

.hero-description {
  max-width: 600px;
  margin: 28px 0 0;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.85;
}

.download-area {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 14px 18px;
  margin-top: 34px;
  scroll-margin-top: 110px;
}

.download-button {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  min-width: 220px;
  min-height: 66px;
  padding: 10px 24px;
  color: #fff;
  background: linear-gradient(135deg, #0667ef, var(--blue));
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 18px;
  box-shadow: 0 18px 34px rgba(0, 83, 204, 0.27);
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.download-button-ios {
  color: #fff;
  background: linear-gradient(135deg, #26354f, #111827);
  box-shadow: 0 18px 34px rgba(17, 24, 39, 0.22);
}

.download-button-ios:hover {
  box-shadow: 0 22px 40px rgba(17, 24, 39, 0.28);
}

.download-button-windows {
  background: linear-gradient(135deg, #1689df, #0067b8);
  box-shadow: 0 18px 34px rgba(0, 103, 184, 0.24);
}

.download-button-windows:hover {
  box-shadow: 0 22px 40px rgba(0, 103, 184, 0.3);
}

.download-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 40px rgba(0, 83, 204, 0.32);
}

.download-button.is-disabled {
  opacity: 0.76;
}

.download-copy {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.download-copy small {
  color: rgba(255, 255, 255, 0.75);
  font-size: 11px;
}

.download-copy b {
  font-size: 18px;
}

.platform-icon {
  display: grid;
  flex: 0 0 auto;
  place-items: center;
  width: 30px;
  height: 30px;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.86);
  border-radius: 9px;
  font-size: 16px;
  font-weight: 900;
}

.ios-icon {
  border-radius: 50%;
  font-family: Georgia, serif;
  font-style: italic;
}

.download-button.is-loading .platform-icon {
  display: none;
}

.button-loading {
  display: none;
  width: 28px;
  height: 28px;
  border: 3px solid rgba(255, 255, 255, 0.34);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

.download-button.is-loading .button-loading {
  display: block;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  color: #3f4b5f;
  font-size: 13px;
  font-weight: 600;
}

.hero-points li {
  display: flex;
  align-items: center;
  gap: 7px;
}

.hero-points span {
  display: grid;
  place-items: center;
  width: 20px;
  height: 20px;
  color: var(--blue);
  background: #e7f0ff;
  border-radius: 50%;
  font-size: 11px;
}

.hero-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 570px;
}

.hero-visual::before {
  position: absolute;
  width: 470px;
  height: 470px;
  content: "";
  background: radial-gradient(circle, rgba(60, 132, 255, 0.18), rgba(0, 83, 204, 0.04) 52%, transparent 72%);
  border-radius: 50%;
}

.orbit {
  position: absolute;
  border: 1px solid rgba(0, 83, 204, 0.14);
  border-radius: 50%;
}

.orbit-one {
  width: 430px;
  height: 430px;
}

.orbit-two {
  width: 520px;
  height: 520px;
  border-style: dashed;
}

.app-shot-frame {
  position: relative;
  z-index: 2;
  width: 300px;
  height: 650px;
  overflow: hidden;
  background: #ffffff;
  border: 9px solid #182033;
  border-radius: 42px;
  box-shadow: 0 38px 90px rgba(14, 45, 95, 0.25);
}

.app-shot-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.floating-chip {
  position: absolute;
  z-index: 3;
  padding: 11px 15px;
  background: rgba(255, 255, 255, 0.93);
  border: 1px solid rgba(222, 232, 246, 0.9);
  border-radius: 14px;
  box-shadow: 0 16px 38px rgba(20, 61, 119, 0.14);
  color: #536074;
  font-size: 12px;
  font-weight: 700;
  backdrop-filter: blur(12px);
}

.chip-speed {
  top: 128px;
  right: -10px;
}

.chip-speed span {
  display: block;
  color: var(--green);
  font-size: 15px;
}

.chip-route {
  bottom: 88px;
  left: -22px;
  color: var(--blue);
}

.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(1120px, calc(100% - 48px));
  margin: -8px auto 0;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 24px;
  box-shadow: 0 18px 56px rgba(26, 67, 127, 0.08);
}

.proof-strip div {
  display: flex;
  flex-direction: column;
  gap: 5px;
  align-items: center;
  border-right: 1px solid var(--line);
}

.proof-strip div:last-child {
  border: 0;
}

.proof-strip strong {
  color: var(--blue);
  font-size: 22px;
}

.proof-strip span {
  color: var(--muted);
  font-size: 13px;
}

.section {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 120px 0;
}

.section-heading {
  max-width: 600px;
  margin: 0 auto 54px;
  text-align: center;
}

.section-heading h2,
.experience h2,
.security h2,
.final-cta h2 {
  margin: 0;
  font-size: clamp(32px, 4vw, 46px);
  line-height: 1.2;
  letter-spacing: -0.035em;
}

.section-heading > span {
  display: block;
  margin-top: 18px;
  color: var(--muted);
  line-height: 1.8;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  position: relative;
  min-height: 290px;
  padding: 34px;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 28px;
  box-shadow: 0 18px 45px rgba(24, 67, 130, 0.07);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

.feature-card::after {
  position: absolute;
  right: -50px;
  bottom: -60px;
  width: 160px;
  height: 160px;
  content: "";
  border-radius: 50%;
}

.feature-blue::after {
  background: rgba(0, 83, 204, 0.06);
}

.feature-orange::after {
  background: rgba(255, 169, 10, 0.09);
}

.feature-green::after {
  background: rgba(57, 215, 125, 0.09);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.feature-card img {
  width: 72px;
  height: 72px;
}

.feature-card h3 {
  margin: 28px 0 12px;
  font-size: 21px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.experience {
  padding: 24px;
  background: var(--blue);
}

.experience-card {
  display: grid;
  grid-template-columns: 1fr 0.9fr;
  gap: 60px;
  align-items: center;
  width: min(1120px, 100%);
  margin: 0 auto;
  padding: 86px 70px;
  overflow: hidden;
  background:
    radial-gradient(circle at 85% 50%, rgba(94, 161, 255, 0.42), transparent 30%),
    linear-gradient(135deg, #0053cc, #073a95);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 34px;
}

.experience .section-kicker {
  color: #9fc5ff;
}

.experience h2 {
  color: #fff;
}

.steps {
  display: grid;
  gap: 24px;
  margin: 38px 0 0;
  padding: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 16px;
  align-items: start;
}

.steps li > span {
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 14px;
  font-size: 12px;
  font-weight: 800;
}

.steps b {
  color: #fff;
  font-size: 17px;
}

.steps p {
  margin: 6px 0 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
  line-height: 1.6;
}

.experience-art {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 430px;
}

.experience-art img {
  position: relative;
  z-index: 2;
  width: 390px;
}

.art-glow {
  position: absolute;
  width: 360px;
  height: 360px;
  background: rgba(42, 119, 233, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 50%;
  box-shadow: 0 0 90px rgba(77, 151, 255, 0.48);
}

.art-pill {
  position: absolute;
  z-index: 3;
  padding: 10px 14px;
  color: #fff;
  background: rgba(10, 39, 93, 0.76);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 12px;
  font-size: 12px;
  backdrop-filter: blur(10px);
}

.art-pill-one {
  top: 78px;
  right: 0;
}

.art-pill-two {
  bottom: 74px;
  left: 2px;
}

.security {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 100px;
  align-items: center;
}

.security-visual {
  position: relative;
  display: grid;
  place-items: center;
  min-height: 440px;
}

.security-visual > img {
  position: absolute;
  top: 36px;
  right: 72px;
  z-index: 3;
  transform: rotate(12deg);
}

.security-ring {
  position: absolute;
  border: 1px solid rgba(0, 83, 204, 0.15);
  border-radius: 50%;
}

.ring-one {
  width: 360px;
  height: 360px;
}

.ring-two {
  width: 290px;
  height: 290px;
  background: #edf4ff;
}

.security-lock {
  position: relative;
  z-index: 2;
  display: grid;
  place-items: center;
  width: 200px;
  height: 200px;
  background: #fff;
  border-radius: 50%;
  box-shadow: 0 30px 70px rgba(0, 83, 204, 0.18);
}

.security-lock img {
  width: 120px;
}

.security-copy > p:not(.section-kicker) {
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.9;
}

.security-copy ul {
  display: grid;
  gap: 14px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
}

.security-copy li {
  position: relative;
  padding-left: 30px;
  color: #435067;
  font-weight: 600;
}

.security-copy li::before {
  position: absolute;
  top: -1px;
  left: 0;
  display: grid;
  place-items: center;
  width: 21px;
  height: 21px;
  content: "✓";
  color: #fff;
  background: var(--green);
  border-radius: 50%;
  font-size: 11px;
}

.final-cta {
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto 100px;
  padding: 76px 24px;
  color: #fff;
  text-align: center;
  background:
    radial-gradient(circle at 18% 20%, rgba(255, 169, 10, 0.25), transparent 25%),
    linear-gradient(135deg, #172746, #063d98);
  border-radius: 36px;
}

.final-cta > div {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
  font-size: 17px;
  font-weight: 800;
}

.final-cta > div img {
  border-radius: 17px;
}

.final-cta > div p {
  margin: 0;
}

.final-cta > p {
  margin: 18px 0 28px;
  color: rgba(255, 255, 255, 0.68);
}

.final-cta > a {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 15px 22px;
  color: #172033;
  background: #fff;
  border-radius: 14px;
  font-weight: 800;
}

.final-cta > a span {
  color: var(--blue);
  font-size: 20px;
}

.site-footer {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  width: min(1120px, calc(100% - 48px));
  margin: 0 auto;
  padding: 30px 0 36px;
  color: #7b8798;
  border-top: 1px solid var(--line);
  font-size: 12px;
}

.footer-brand {
  font-size: 14px;
}

.footer-note {
  justify-self: end;
}

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

@media (max-width: 900px) {
  .desktop-nav {
    display: none;
  }

  .site-header {
    grid-template-columns: 1fr auto;
  }

  .hero {
    grid-template-columns: 1fr;
    gap: 46px;
    padding-top: 72px;
    text-align: center;
  }

  .eyebrow,
  .download-area,
  .hero-points {
    justify-content: center;
  }

  .hero-description {
    margin-right: auto;
    margin-left: auto;
  }

  .hero-visual {
    min-height: 620px;
  }

  .feature-grid {
    grid-template-columns: 1fr;
  }

  .feature-card {
    min-height: 0;
  }

  .experience-card,
  .security {
    grid-template-columns: 1fr;
  }

  .experience-art {
    order: -1;
  }

  .security {
    gap: 36px;
  }

  .security-copy {
    text-align: center;
  }

  .security-copy ul {
    width: max-content;
    max-width: 100%;
    margin-right: auto;
    margin-left: auto;
    text-align: left;
  }
}

@media (max-width: 640px) {
  .site-header {
    width: calc(100% - 24px);
    height: 66px;
    margin-top: 8px;
    padding: 0 14px;
    border-radius: 16px;
  }

  .brand {
    gap: 8px;
    font-size: 15px;
  }

  .brand img {
    width: 38px;
    height: 38px;
  }

  .header-download {
    padding: 9px 12px;
    font-size: 12px;
  }

  .hero {
    width: calc(100% - 32px);
    min-height: auto;
    padding: 58px 0 72px;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-description {
    font-size: 16px;
  }

  .download-area {
    flex-direction: column;
  }

  .download-button {
    justify-content: center;
    width: min(100%, 300px);
  }

  .hero-points {
    gap: 12px;
  }

  .hero-visual {
    min-height: 520px;
    transform: scale(0.88);
    transform-origin: top center;
    margin-bottom: -62px;
  }

  .app-shot-frame {
    width: 286px;
    height: 637px;
  }

  .orbit-two {
    width: 430px;
    height: 430px;
  }

  .chip-speed {
    right: -16px;
  }

  .chip-route {
    left: -16px;
  }

  .proof-strip {
    grid-template-columns: repeat(2, 1fr);
    gap: 22px 0;
    width: calc(100% - 32px);
  }

  .proof-strip div:nth-child(2) {
    border-right: 0;
  }

  .section {
    width: calc(100% - 32px);
    padding: 84px 0;
  }

  .section-heading {
    margin-bottom: 36px;
  }

  .feature-card {
    padding: 28px;
    border-radius: 22px;
  }

  .experience {
    padding: 12px;
  }

  .experience-card {
    gap: 30px;
    padding: 54px 24px;
    border-radius: 28px;
  }

  .experience-art {
    min-height: 300px;
  }

  .experience-art img {
    width: 300px;
  }

  .art-glow {
    width: 270px;
    height: 270px;
  }

  .art-pill-one {
    top: 35px;
  }

  .art-pill-two {
    bottom: 30px;
  }

  .security-visual {
    min-height: 330px;
    transform: scale(0.82);
    margin: -30px 0;
  }

  .final-cta {
    width: calc(100% - 32px);
    margin-bottom: 70px;
    padding: 58px 22px;
    border-radius: 28px;
  }

  .site-footer {
    grid-template-columns: 1fr;
    gap: 12px;
    justify-items: center;
    width: calc(100% - 32px);
    text-align: center;
  }

  .footer-note {
    justify-self: center;
  }
}

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

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}