:root {
  --bg: #fff;
  --surface: #f8f5f1;
  --ink: #1d1d1f;
  --muted: #62626b;
  --blue: #c65311;
  --link: #ad430c;
  --line: #dedee5;
  --warning: #b3261e;
  --warning-bg: #fff2f1;
  font-family:
    -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
  -webkit-font-smoothing: antialiased;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 24px;
}
body {
  margin: 0;
}
a {
  color: var(--link);
  text-decoration: none;
}
button {
  font: inherit;
}
[hidden] {
  display: none !important;
}
a,
button {
  -webkit-tap-highlight-color: transparent;
}
a:focus-visible,
button:focus-visible {
  outline: 3px solid var(--link);
  outline-offset: 5px;
}
a:hover {
  text-decoration: underline;
}
img {
  display: block;
  max-width: 100%;
  height: auto;
}
.container {
  width: min(1200px, calc(100% - 96px));
  margin-inline: auto;
}
.skip-link {
  position: fixed;
  z-index: 5;
  left: 16px;
  top: 12px;
  transform: translateY(-180%);
  padding: 12px 20px;
  background: #fff;
  border: 2px solid var(--blue);
  border-radius: 10px;
}
.skip-link:focus {
  transform: translateY(0);
}
.site-header {
  height: 104px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 16px;
  color: var(--ink);
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -1px;
}
.brand:hover {
  text-decoration: none;
}
.brand img,
.footer-brand img {
  border-radius: 25%;
}
.site-header nav {
  display: flex;
  gap: 36px;
}
.site-header nav a {
  display: flex;
  align-items: center;
  min-height: 48px;
  font-size: 17px;
  color: var(--ink);
}
.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 310px;
  gap: 72px;
  align-items: center;
  padding-block: 24px 64px;
}
.hero-copy {
  padding-bottom: 8px;
}
.hero-grid.download-only {
  grid-template-columns: minmax(0, 640px);
  justify-content: center;
}
h1 {
  font-size: clamp(36px, 4.1vw, 58px);
  line-height: 1.28;
  letter-spacing: -0.055em;
  margin: 0;
  font-weight: 700;
  white-space: nowrap;
}
h1 span {
  color: var(--blue);
}
.hero-subtitle {
  font-size: clamp(21px, 2.2vw, 29px);
  line-height: 1.6;
  letter-spacing: -0.035em;
  color: var(--muted);
  margin: 24px 0 36px;
}
.downloads {
  max-width: 568px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 14px;
  min-height: 62px;
  padding: 16px 24px;
  border: 0;
  border-radius: 17px;
  cursor: pointer;
  font-size: 20px;
  font-weight: 600;
  line-height: 1.4;
  transition:
    background 0.14s,
    transform 0.14s;
}
.button:hover {
  text-decoration: none;
  transform: translateY(-1px);
}
.button-primary {
  background: var(--blue);
  color: #fff;
  width: 100%;
}
.button-primary:hover {
  background: #ad430c;
}
.button svg {
  width: 25px;
  height: 27px;
  flex-shrink: 0;
}
.download-meta {
  font-size: 14px;
  line-height: 1.6;
  color: var(--muted);
  margin: 12px 0 22px;
}
.ios-row {
  min-height: 74px;
  display: flex;
  align-items: center;
  gap: 17px;
  border: 1px solid var(--line);
  border-radius: 17px;
  padding: 15px 20px;
  color: var(--ink);
  transition:
    border-color 0.14s,
    background 0.14s;
}
.ios-row:hover {
  text-decoration: none;
  background: #fafafa;
  border-color: #b2b2bc;
}
.ios-row > svg {
  width: 26px;
  height: 29px;
  color: #62626b;
  flex-shrink: 0;
}
.ios-copy {
  display: flex;
  flex-direction: column;
  gap: 3px;
  font-size: 15px;
  line-height: 1.4;
}
.ios-copy strong {
  font-weight: 600;
  font-size: 17px;
}
.ios-copy > span {
  color: var(--muted);
}
.ios-action {
  color: var(--link);
  font-size: 15px;
  margin-left: auto;
  white-space: nowrap;
  font-weight: 500;
}
.platform-note {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.8;
  margin: 20px 0 0;
}
.mobile-only {
  display: none;
}
.app-preview {
  margin: 0;
  justify-self: center;
}
.phone {
  width: 310px;
  background: #171717;
  padding: 9px;
  border: 2px solid #565656;
  border-radius: 48px;
  box-shadow: 0 14px 26px -16px #0003;
}
.phone img {
  border-radius: 37px;
  width: 100%;
}
.safety {
  background: var(--warning-bg);
  color: var(--warning);
  padding-block: 38px;
  scroll-margin: 0;
}
.safety-inner {
  display: flex;
  align-items: center;
  gap: 32px;
}
.safety svg {
  width: 44px;
  height: 50px;
  flex-shrink: 0;
}
.safety h2 {
  font-size: 30px;
  line-height: 1.4;
  letter-spacing: -0.035em;
  margin: 0 0 10px;
}
.safety p {
  font-size: 19px;
  line-height: 1.8;
  margin: 0;
}
.how-to {
  background: var(--surface);
  padding-block: 76px 80px;
}
.how-to h2 {
  font-size: 42px;
  line-height: 1.3;
  letter-spacing: -0.045em;
  margin: 0 0 38px;
}
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 56px;
  list-style: none;
  padding: 0;
  margin: 0;
}
.steps li {
  position: relative;
}
.step-number {
  height: 56px;
  width: 56px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--link);
  background: #e1eeff;
  font-size: 21px;
  font-weight: 600;
  font-variant-numeric: tabular-nums;
}
.steps li:not(:last-child)::after {
  content: "";
  position: absolute;
  top: 28px;
  left: 82px;
  right: 0;
  height: 1px;
  background: #d9dce5;
}
.steps h3 {
  font-size: 24px;
  letter-spacing: -0.035em;
  line-height: 1.4;
  margin: 20px 0 8px;
}
.steps p {
  font-size: 19px;
  line-height: 1.7;
  margin: 0;
  color: var(--muted);
}
.site-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding-block: 40px;
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 16px;
  white-space: nowrap;
}
.footer-brand p {
  font-size: 17px;
  margin: 0;
}
.footer-brand strong {
  font-size: 21px;
}
.footer-brand span {
  color: var(--muted);
}
.footer-info {
  text-align: right;
  font-size: 14px;
  color: var(--muted);
}
.footer-info nav {
  display: flex;
  justify-content: flex-end;
  gap: 0;
}
.footer-info nav a {
  color: var(--muted);
  min-height: 44px;
  display: flex;
  align-items: center;
}
.footer-info nav a + a::before {
  content: "";
  height: 14px;
  width: 1px;
  background: var(--line);
  margin: 0 20px;
}
.footer-info p {
  margin: 0;
  line-height: 1.7;
}
dialog {
  width: min(570px, calc(100% - 32px));
  max-height: calc(100dvh - 48px);
  padding: 40px;
  border: 1px solid var(--line);
  border-radius: 25px;
  color: var(--ink);
  box-shadow: 0 24px 80px #0002;
  overscroll-behavior: contain;
}
dialog::backdrop {
  background: #12121e55;
  backdrop-filter: blur(5px);
}
dialog h2 {
  font-size: 28px;
  line-height: 1.35;
  letter-spacing: -0.04em;
  margin: 12px 20px 24px 0;
}
dialog p,
dialog li {
  font-size: 17px;
  line-height: 1.8;
}
dialog form {
  margin: 0;
}
dialog > .dialog-note {
  color: var(--muted);
  font-size: 15px;
}
.dialog-close {
  position: absolute;
  top: 12px;
  right: 12px;
  background: transparent;
  border: 0;
  border-radius: 50%;
  width: 44px;
  height: 44px;
  cursor: pointer;
  color: var(--muted);
  font-size: 30px;
  line-height: 1;
}
.dialog-close:hover {
  background: var(--surface);
}
.instruction-list {
  padding-left: 24px;
}
.instruction-list li + li {
  margin-top: 15px;
}
.dialog-warning {
  background: var(--warning-bg);
  color: var(--warning);
  padding: 16px;
  border-radius: 12px;
}
.release-details > div {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--line);
  font-size: 16px;
}
.release-details dt {
  color: var(--muted);
}
.release-details dd {
  margin: 0;
  text-align: right;
}
.checksum {
  display: block;
  overflow-wrap: anywhere;
  background: var(--surface);
  padding: 16px;
  border-radius: 10px;
  line-height: 1.7;
  font-size: 13px;
}
.text-action {
  font-weight: 600;
}
.help-page {
  max-width: 760px;
  padding-block: 30px 60px;
}
.help-page h1 {
  font-size: 40px;
  white-space: normal;
}
.help-page h2 {
  margin-top: 48px;
  font-size: 26px;
}
.help-page p,
.help-page li {
  font-size: 18px;
  line-height: 1.85;
}
.help-page li + li {
  margin-top: 12px;
}
.share-site-button {
  color: var(--link);
  border: 0;
  background: none;
  padding: 10px 0;
  min-height: 48px;
  cursor: pointer;
}
.share-feedback {
  font-size: 16px;
}
.share-feedback p:empty {
  display: none;
}
.share-feedback textarea,
.invite-page textarea {
  display: block;
  width: 100%;
  font: inherit;
  line-height: 1.7;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  margin-top: 12px;
}
.invite-page {
  max-width: 640px;
  padding-block: 30px 60px;
}
.invite-page h1 {
  font-size: clamp(30px, 7vw, 44px);
  white-space: normal;
  line-height: 1.4;
  margin-block: 12px 28px;
}
.invite-page p {
  line-height: 1.8;
  font-size: 18px;
}
.invite-eyebrow,
.invite-number-label {
  color: var(--muted);
  margin: 0;
}
.invite-page .invite-code {
  font-size: clamp(19px, 4.9vw, 28px);
  font-weight: 650;
  overflow-wrap: anywhere;
  margin: 6px 0 28px;
}
.invite-page .button {
  width: 100%;
}
.invite-instruction {
  color: var(--muted);
}
.invite-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 28px;
}
.invite-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.invite-wechat {
  background: var(--surface);
  border-radius: 16px;
  padding: 20px;
  margin-top: 20px;
}
.invite-wechat strong {
  font-size: 18px;
}
.invite-wechat p {
  font-size: 16px;
  margin-bottom: 0;
}
.invite-preview {
  margin-top: 32px;
}
.invite-preview summary {
  cursor: pointer;
  padding-block: 12px;
  font-size: 18px;
}
.invite-preview pre {
  font: inherit;
  font-size: 16px;
  line-height: 1.8;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 16px;
}
.invite-page .invite-safety {
  font-size: 15px;
  color: var(--muted);
}
@media (max-width: 1100px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1fr) 270px;
    gap: 44px;
  }
  .phone {
    width: 270px;
    border-radius: 44px;
  }
  .phone img {
    border-radius: 33px;
  }
  .hero-subtitle {
    margin-block: 20px 28px;
  }
  .ios-row {
    gap: 12px;
    padding-inline: 16px;
  }
  .ios-action {
    font-size: 14px;
  }
  .platform-note {
    font-size: 13px;
  }
  .site-footer {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }
  .footer-info {
    text-align: left;
  }
  .footer-info nav {
    justify-content: flex-start;
  }
}
@media (max-width: 760px) {
  .container {
    width: calc(100% - 48px);
  }
  .site-header {
    height: 86px;
  }
  .brand {
    gap: 10px;
    font-size: 24px;
  }
  .brand img {
    width: 36px;
    height: 36px;
  }
  .site-header nav {
    gap: 14px;
    flex-wrap: wrap;
    justify-content: flex-end;
  }
  .site-header nav a,
  .share-site-button {
    font-size: 14px;
  }
  .hero {
    display: flex;
    flex-direction: column;
  }
  .hero-grid {
    display: contents;
  }
  .hero-copy {
    order: 1;
    width: calc(100% - 48px);
    margin-inline: auto;
    padding-block: 28px 32px;
  }
  h1 {
    font-size: clamp(32px, 7.8vw, 52px);
    line-height: 1.36;
    letter-spacing: -0.055em;
  }
  .hero-subtitle {
    font-size: 19px;
    margin: 18px 0 28px;
  }
  .downloads {
    max-width: 100%;
  }
  .button {
    min-height: 60px;
    font-size: 19px;
    border-radius: 15px;
  }
  .download-meta {
    font-size: 12px;
    margin: 10px 0 18px;
  }
  .ios-row {
    padding: 14px 15px;
    border-radius: 15px;
    gap: 13px;
  }
  .ios-copy {
    font-size: 13px;
  }
  .ios-copy strong {
    font-size: 16px;
  }
  .ios-action {
    font-size: 13px;
  }
  .platform-note {
    font-size: 13px;
    margin-top: 16px;
    line-height: 1.9;
  }
  .mobile-only {
    display: block;
  }
  .safety {
    order: 2;
    padding-block: 26px;
  }
  .safety-inner {
    align-items: flex-start;
    gap: 15px;
  }
  .safety svg {
    width: 27px;
    height: 32px;
    margin-top: 2px;
  }
  .safety h2 {
    font-size: 21px;
    letter-spacing: -0.035em;
    margin-bottom: 8px;
  }
  .safety p {
    font-size: 14px;
    line-height: 1.9;
  }
  .app-preview {
    order: 3;
    padding: 40px 0;
    background: #fff;
    width: 100%;
    display: flex;
    justify-content: center;
  }
  .phone {
    width: 220px;
    border-radius: 37px;
    padding: 7px;
    box-shadow: 0 20px 45px -24px #0005;
  }
  .phone img {
    border-radius: 28px;
  }
  .how-to {
    padding-block: 42px 46px;
  }
  .how-to h2 {
    font-size: 30px;
    margin-bottom: 28px;
  }
  .steps {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .steps li {
    padding-left: 66px;
    min-height: 62px;
  }
  .step-number {
    position: absolute;
    top: 0;
    left: 0;
    width: 44px;
    height: 44px;
    font-size: 17px;
  }
  .steps li:not(:last-child)::after {
    left: 22px;
    top: 56px;
    bottom: -17px;
    width: 1px;
    height: auto;
    right: auto;
  }
  .steps h3 {
    font-size: 21px;
    margin: 0 0 7px;
  }
  .steps p {
    font-size: 16px;
  }
  .steps p br {
    display: none;
  }
  .site-footer {
    padding-block: 30px;
    gap: 18px;
  }
  .footer-brand {
    gap: 12px;
  }
  .footer-brand img {
    width: 34px;
    height: 34px;
  }
  .footer-brand p {
    font-size: 15px;
  }
  .footer-brand strong {
    font-size: 19px;
  }
  .footer-info {
    font-size: 12px;
  }
  .footer-info nav a + a::before {
    margin: 0 14px;
  }
  dialog {
    padding: 28px 24px;
    border-radius: 21px;
  }
  dialog h2 {
    font-size: 26px;
  }
  dialog p,
  dialog li {
    font-size: 16px;
  }
  .help-page {
    padding-top: 18px;
  }
  .help-page h1 {
    font-size: 32px;
  }
}
@media (max-width: 360px) {
  .container,
  .hero-copy {
    width: calc(100% - 36px);
  }
  .site-header nav {
    gap: 14px;
  }
  .site-header nav a {
    font-size: 13px;
  }
  .ios-action {
    font-size: 12px;
  }
  .ios-row {
    gap: 10px;
    padding-inline: 12px;
  }
  .safety h2 {
    font-size: 19px;
  }
  .safety p {
    font-size: 13px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    transition: none !important;
  }
  .button:hover {
    transform: none;
  }
}