:root {
  color-scheme: light dark;
  --bg: #f8f7f4;
  --ink: #24282d;
  --muted: #6b7076;
  --line: #dedfdc;
  --accent: #4557e8;
  --panel: #eeefec;
  --paper: #fff;
  --shadow: 0 26px 80px #25293216;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 30px;
}
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font:
    16px/1.65 -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
a,
summary {
  -webkit-tap-highlight-color: transparent;
}
a:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 6px;
  border-radius: 5px;
}
.shell {
  width: min(1100px, calc(100% - 64px));
  margin-inline: auto;
}
.skip {
  position: fixed;
  top: -80px;
  left: 20px;
  padding: 12px;
  background: var(--paper);
  z-index: 10;
}
.skip:focus {
  top: 15px;
}
.nav {
  height: 104px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 11px;
  font-size: 20px;
  font-weight: 650;
  letter-spacing: -0.6px;
}
.nav nav {
  display: flex;
  align-items: center;
  gap: 30px;
  font-size: 14px;
  color: var(--muted);
}
.nav a:hover {
  color: var(--accent);
}
.languages {
  position: relative;
  z-index: 3;
}
.languages summary {
  list-style: none;
  cursor: pointer;
}
.languages summary::-webkit-details-marker {
  display: none;
}
.languages div {
  position: absolute;
  right: 0;
  top: 32px;
  min-width: 145px;
  background: var(--paper);
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
  border-radius: 14px;
  padding: 8px;
}
.languages a {
  display: block;
  padding: 8px 12px;
  white-space: nowrap;
}
.languages a[aria-current] {
  color: var(--accent);
}
.hero {
  text-align: center;
  padding-top: 62px;
}
.eyebrow {
  font-size: 11px;
  font-weight: 650;
  letter-spacing: 2px;
  color: var(--muted);
  margin: 0 0 24px;
}
.hero .eyebrow {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
}
.hero .eyebrow span {
  height: 6px;
  width: 6px;
  border-radius: 50%;
  background: var(--accent);
}
h1 {
  font-size: clamp(48px, 7vw, 88px);
  line-height: 1.06;
  letter-spacing: -5px;
  font-weight: 620;
  margin: 0;
}
h1 em {
  font-family: Georgia, 'Songti SC', serif;
  font-weight: 400;
  color: var(--accent);
}
.lead {
  max-width: 550px;
  margin: 28px auto 25px;
  font-size: 18px;
  line-height: 1.75;
  color: var(--muted);
}
.actions {
  display: flex;
  gap: 27px;
  align-items: center;
  justify-content: center;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 30px;
  border-radius: 14px;
  background: var(--accent);
  color: #fff;
  padding: 15px 24px;
  font-weight: 600;
  font-size: 15px;
  transition:
    transform 0.2s,
    box-shadow 0.2s;
}
.button:hover {
  transform: translateY(-2px);
  box-shadow: 0 9px 20px #4557e829;
}
.quiet {
  font-size: 14px;
  color: var(--muted);
}
.quiet:hover {
  color: var(--ink);
}
.requirements {
  font-size: 12px;
  color: var(--muted);
  margin-top: 17px;
}
.product {
  position: relative;
  isolation: isolate;
  margin: 64px 20px 0;
}
.product .glow {
  position: absolute;
  inset: -20px -20px 35%;
  z-index: -1;
  background: radial-gradient(ellipse, #c8d3d960, transparent 70%);
  filter: blur(15px);
}
.product img {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 16px;
  box-shadow: var(--shadow);
  border: 1px solid #ffffff50;
}
.product figcaption {
  color: var(--muted);
  font-size: 12px;
  margin-top: 21px;
}
.workflow {
  padding: 126px 0 95px;
  border-bottom: 1px solid var(--line);
}
h2 {
  font-size: clamp(34px, 4vw, 49px);
  line-height: 1.16;
  letter-spacing: -2px;
  font-weight: 550;
  margin: 0;
}
h3 {
  font-size: 20px;
  line-height: 1.35;
  font-weight: 600;
  letter-spacing: -0.4px;
  margin: 20px 0 12px;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 52px;
  margin-top: 52px;
}
.steps p,
.feature-grid p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}
.number {
  font:
    italic 33px Georgia,
    serif;
  color: var(--accent);
}
.extras {
  padding: 96px 0;
}
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 52px;
  margin-top: 50px;
}
.feature-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 45px;
  width: 45px;
  border: 1px solid var(--line);
  border-radius: 13px;
  color: var(--accent);
  font-size: 23px;
  font-weight: 450;
}
.privacy {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  align-items: center;
  gap: 45px;
  padding: 64px 76px;
  background: var(--panel);
  border-radius: 28px;
}
.privacy-symbol {
  height: 190px;
  width: 190px;
  display: grid;
  place-items: center;
  background: var(--bg);
  border-radius: 50%;
  font-size: 120px;
  line-height: 1;
  color: var(--accent);
  transform: rotate(-30deg);
}
.privacy .eyebrow {
  margin-bottom: 20px;
}
.privacy p:last-child {
  color: var(--muted);
  font-size: 15px;
  margin: 22px 0 0;
  max-width: 470px;
}
.faq {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 45px;
  padding: 100px 0;
}
.faq details {
  border-bottom: 1px solid var(--line);
}
.faq details:first-child {
  border-top: 1px solid var(--line);
}
.faq summary {
  display: flex;
  justify-content: space-between;
  gap: 15px;
  align-items: center;
  padding: 21px 0;
  cursor: pointer;
  list-style: none;
  font-size: 15px;
  font-weight: 550;
}
.faq summary::-webkit-details-marker {
  display: none;
}
.faq summary span {
  font-size: 22px;
  font-weight: 300;
  color: var(--muted);
}
.faq details[open] summary span {
  transform: rotate(45deg);
}
.faq details p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  margin: 0 30px 22px 0;
}
.closing {
  text-align: center;
  border-top: 1px solid var(--line);
  padding: 85px 0;
}
.closing img {
  border-radius: 16px;
}
.closing h2 {
  margin: 23px 0 28px;
}
footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 24px 0 38px;
  color: var(--muted);
  font-size: 12px;
}
footer div {
  display: flex;
  gap: 25px;
}
footer a:hover {
  color: var(--accent);
}
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #181b20;
    --ink: #eef0ed;
    --muted: #a4a9b2;
    --line: #333842;
    --accent: #98a5ff;
    --panel: #242931;
    --paper: #242931;
    --shadow: 0 26px 80px #0005;
  }
  .button {
    background: #5368e9;
    color: #fff;
  }
  h1 em {
    color: #a5b0ff;
  }
  .product .glow {
    background: radial-gradient(ellipse, #4557e838, transparent 70%);
  }
  .product img {
    border-color: #ffffff18;
  }
}
@media (max-width: 700px) {
  .shell {
    width: calc(100% - 40px);
  }
  .nav {
    height: 83px;
  }
  .nav nav {
    gap: 19px;
  }
  .nav nav > a {
    display: none;
  }
  .brand {
    font-size: 18px;
  }
  .hero {
    padding-top: 43px;
  }
  h1 {
    font-size: 48px;
    letter-spacing: -2.8px;
  }
  .hero .eyebrow {
    font-size: 9px;
    letter-spacing: 1.3px;
  }
  .lead {
    font-size: 16px;
    margin-top: 23px;
    max-width: 340px;
  }
  .actions {
    flex-direction: column;
    gap: 17px;
  }
  .button {
    padding: 14px 22px;
  }
  .requirements {
    font-size: 11px;
    margin-top: 20px;
  }
  .product {
    margin: 39px 0 0;
  }
  .product img {
    border-radius: 9px;
  }
  .product figcaption {
    font-size: 11px;
    margin-top: 16px;
  }
  .workflow {
    padding: 72px 0 55px;
  }
  .steps,
  .feature-grid {
    grid-template-columns: 1fr;
    gap: 30px;
    margin-top: 35px;
  }
  .steps article {
    position: relative;
    padding-left: 48px;
  }
  .number {
    position: absolute;
    left: 0;
    top: 0;
    font-size: 27px;
  }
  .steps h3 {
    margin-top: 0;
  }
  h2 {
    font-size: 36px;
    letter-spacing: -1.5px;
  }
  .extras {
    padding: 55px 0;
  }
  .feature-grid article {
    padding-left: 60px;
    position: relative;
  }
  .feature-icon {
    position: absolute;
    left: 0;
    top: 0;
  }
  .feature-grid h3 {
    margin-top: 0;
  }
  .privacy {
    grid-template-columns: 1fr;
    padding: 31px 26px;
    gap: 27px;
    border-radius: 22px;
  }
  .privacy-symbol {
    height: 82px;
    width: 82px;
    font-size: 56px;
  }
  .privacy h2 {
    font-size: 33px;
  }
  .faq {
    grid-template-columns: 1fr;
    gap: 30px;
    padding: 60px 0;
  }
  .closing {
    padding: 55px 0;
  }
  .closing h2 {
    font-size: 35px;
  }
  footer {
    gap: 20px;
    align-items: flex-start;
    font-size: 11px;
  }
  footer div {
    gap: 16px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .button {
    transition: none;
  }
  .button:hover {
    transform: none;
  }
}

@media (max-width: 700px) {
  html[lang^='zh'] h1 {
    font-size: 40px;
    letter-spacing: -2px;
  }
}