@charset "UTF-8";

:root {
  color-scheme: light;
  --paper: #f8f8f8;
  --ink: #181818;
  --muted: #777777;
  --line: #dddddd;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
    "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 30px;
}
body {
  margin: 0;
  min-width: 320px;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
input,
select {
  font: inherit;
  color: inherit;
}
button,
select {
  cursor: pointer;
}
button,
a,
select {
  -webkit-tap-highlight-color: transparent;
}
button:focus-visible,
a:focus-visible,
select:focus-visible,
input:focus-visible {
  outline: 2px solid var(--ink);
  outline-offset: 6px;
}
::selection {
  background: #252525;
  color: white;
}
.shell {
  width: min(100% - 112px, 1328px);
  margin-inline: auto;
}
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}
.skip-link {
  position: fixed;
  z-index: 10;
  top: 12px;
  left: 12px;
  padding: 12px 18px;
  background: var(--ink);
  color: white;
  transform: translateY(-160%);
}
.skip-link:focus {
  transform: translateY(0);
}
.site-header {
  height: 108px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-bottom: 1px solid var(--line);
  gap: 20px;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 13px;
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.055em;
  white-space: nowrap;
}
.brand-symbol {
  width: 31px;
  height: 27px;
}
.brand-origin {
  font-size: 10px;
  font-weight: 400;
  letter-spacing: 0.025em;
  color: var(--muted);
  border-left: 1px solid var(--line);
  margin-left: 2px;
  padding-left: 13px;
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 36px;
  font-size: 12px;
}
.language-control {
  display: flex;
  align-items: center;
  gap: 7px;
  color: var(--muted);
}
.language-control svg {
  width: 15px;
  height: 15px;
  stroke: currentColor;
  stroke-width: 1.3;
}
.language-control select {
  border: 0;
  background: transparent;
  border-radius: 0;
  padding: 8px 0;
  font-size: 11px;
  max-width: 90px;
}
.nav-login {
  display: flex;
  align-items: center;
  gap: 25px;
  padding: 12px 0;
}
.nav-login:hover {
  color: var(--muted);
}
.hero {
  position: relative;
  min-height: 710px;
  display: grid;
  grid-template-columns: 1.04fr 1fr;
  align-items: center;
  gap: 28px;
  padding-top: 30px;
  padding-bottom: 104px;
}
.hero-copy {
  position: relative;
  z-index: 1;
}
.eyebrow {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  letter-spacing: 0.07em;
  line-height: 1.6;
  margin: 0 0 34px;
}
.tiny-square {
  display: inline-block;
  width: 5px;
  height: 5px;
  background: var(--ink);
}
h1 {
  font-size: clamp(56px, 6.3vw, 92px);
  font-weight: 520;
  line-height: 1.28;
  letter-spacing: -0.065em;
  margin: 0;
}
h1 span {
  display: block;
}
.hero-description {
  font-size: 15px;
  line-height: 1.8;
  color: var(--muted);
  letter-spacing: 0.06em;
  margin: 28px 0 0;
}
.hero-actions {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 30px;
  margin-top: 44px;
}
.button {
  display: inline-flex;
  align-items: center;
  justify-content: space-between;
  gap: 48px;
  min-height: 54px;
  padding: 16px 22px;
  font-size: 13px;
  border: 1px solid var(--ink);
}
.button-dark {
  background: var(--ink);
  color: white;
  transition:
    background 0.2s,
    transform 0.2s;
}
.button-dark:hover {
  background: #383838;
  transform: translateY(-2px);
}
.arrow {
  font-size: 19px;
  line-height: 1;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 23px;
  font-size: 12px;
  padding: 12px 0;
}
.text-link span:last-child {
  display: inline-block;
  transition: transform 0.2s;
}
.text-link:hover span:last-child {
  transform: translate(3px, -2px);
}
.hero-art {
  width: 100%;
  max-width: 560px;
  justify-self: end;
  color: #676767;
  position: relative;
}
.signal {
  width: 100%;
  display: block;
  overflow: visible;
}
.art-frame {
  stroke: #d8d8d8;
  stroke-width: 1;
}
.art-guide {
  stroke: #e9e9e9;
  stroke-width: 0.65;
  stroke-dasharray: 2 5;
}
.signal-lines {
  stroke: currentColor;
  stroke-width: 0.7;
  transform-origin: 50% 50%;
  animation: drift 16s ease-in-out infinite;
}
.signal-detail {
  stroke: #9b9b9b;
  stroke-width: 0.65;
}
.art-caption {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 4px 24px 0;
  font-size: 9px;
  letter-spacing: 0.1em;
  color: #858585;
}
.art-caption span:nth-child(2) {
  margin-left: auto;
}
.caption-line {
  width: 35px;
  height: 1px;
  background: #b2b2b2;
}
.scroll-cue {
  position: absolute;
  left: 0;
  bottom: 37px;
  display: flex;
  align-items: center;
  gap: 22px;
  font-size: 10px;
  letter-spacing: 0.07em;
  color: var(--muted);
}
.scroll-cue span:last-child {
  font-size: 18px;
}
.provider-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  border-block: 1px solid var(--line);
  padding-block: 37px;
}
.provider-strip p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.7;
}
.provider-strip ul {
  display: flex;
  gap: clamp(32px, 5.5vw, 84px);
  list-style: none;
  padding: 0;
  margin: 0;
  font-size: 23px;
  font-weight: 520;
  letter-spacing: -0.045em;
}
.provider-strip li:first-child {
  font-family: Georgia, "Times New Roman", serif;
  font-size: 26px;
  letter-spacing: -0.04em;
}
.connect {
  display: grid;
  grid-template-columns: 1.04fr 1fr;
  gap: 92px;
  padding-block: 126px 122px;
}
.section-number {
  color: var(--muted);
  letter-spacing: 0.04em;
  font-size: 10px;
  margin-right: 10px;
}
.connect .eyebrow {
  margin-bottom: 28px;
  font-size: 10px;
}
h2 {
  font-size: clamp(24px, 2.5vw, 37px);
  font-weight: 450;
  letter-spacing: -0.06em;
  line-height: 1.6;
  margin: 0;
}
h2 span {
  display: block;
}
.muted {
  color: #929292;
}
.connect-detail {
  padding-top: 41px;
}
.connect-description {
  font-size: 13px;
  line-height: 2;
  letter-spacing: 0.015em;
  margin: 0;
  max-width: 440px;
  color: #656565;
}
.endpoint {
  margin-top: 32px;
}
.endpoint-label {
  font-size: 8px;
  color: var(--muted);
  letter-spacing: 0.13em;
}
.endpoint-row {
  display: flex;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid #bfbfbf;
  margin-top: 6px;
}
.endpoint-row input {
  min-width: 0;
  width: 100%;
  border: 0;
  border-radius: 0;
  background: transparent;
  font-family: ui-monospace, SFMono-Regular, Consolas, monospace;
  font-size: 15px;
  padding: 14px 0;
}
.endpoint-row button {
  border: 0;
  background: transparent;
  width: 42px;
  height: 44px;
  flex: 0 0 42px;
  display: grid;
  place-items: center;
}
.endpoint-row button:hover {
  background: #eaeaea;
}
.endpoint-row svg {
  height: 16px;
  width: 16px;
  stroke: currentColor;
  stroke-width: 1.25;
}
.copy-status {
  min-height: 16px;
  margin: 7px 0 9px;
  color: #606060;
  font-size: 10px;
  line-height: 1.6;
}
.site-footer {
  border-top: 1px solid var(--line);
  padding-top: 42px;
  padding-bottom: 24px;
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
}
.footer-wordmark {
  font-weight: 650;
  font-size: 42px;
  letter-spacing: -0.07em;
}
.footer-wordmark span {
  margin-left: 1px;
  color: #9b9b9b;
}
.footer-top p {
  color: var(--muted);
  font-size: 11px;
  letter-spacing: 0.06em;
}
.footer-bottom {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 14px 30px;
  margin-top: 48px;
  color: var(--muted);
  font-size: 9px;
  line-height: 1.8;
}
.footer-bottom a:hover {
  color: var(--ink);
}
.enter {
  animation: enter 850ms ease-out both;
}
h1.enter {
  animation-delay: 100ms;
}
.hero-description.enter {
  animation-delay: 180ms;
}
.hero-actions.enter {
  animation-delay: 240ms;
}
.hero-art.enter {
  animation-delay: 160ms;
  animation-duration: 1400ms;
}
.has-observer .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition:
    opacity 0.8s,
    transform 0.8s;
}
.has-observer .reveal.is-visible {
  opacity: 1;
  transform: none;
}
@keyframes enter {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}
@keyframes drift {
  0%,
  100% {
    transform: rotate(-3deg) scale(0.98);
  }
  50% {
    transform: rotate(3deg) scale(1.02);
  }
}

html:not([lang^="zh"]):not([lang="ja"]) h1 {
  font-size: clamp(44px, 5.6vw, 82px);
  letter-spacing: -0.065em;
  line-height: 1.1;
}
html:not([lang^="zh"]):not([lang="ja"]) h1 span {
  max-width: 9ch;
}
html[lang="ru"] h1 {
  font-size: clamp(39px, 4.5vw, 67px);
}

@media (min-width: 1600px) {
  .hero {
    min-height: 790px;
  }
}
@media (max-width: 1100px) {
  .shell {
    width: calc(100% - 72px);
  }
  .hero {
    min-height: 650px;
    gap: 8px;
  }
  h1 {
    font-size: clamp(51px, 6.3vw, 74px);
  }
  .hero-actions {
    gap: 20px;
  }
  .button {
    gap: 24px;
  }
  .connect {
    gap: 50px;
    padding-block: 105px;
  }
}
@media (max-width: 760px) {
  .shell {
    width: calc(100% - 44px);
  }
  .site-header {
    height: 82px;
  }
  .brand {
    font-size: 20px;
    gap: 9px;
  }
  .brand-symbol {
    width: 27px;
  }
  .brand-origin {
    font-size: 8px;
    padding-left: 9px;
  }
  .header-actions {
    gap: 19px;
  }
  .language-control svg {
    display: none;
  }
  .language-control select {
    max-width: 75px;
    font-size: 10px;
  }
  .nav-login {
    gap: 12px;
    font-size: 11px;
  }
  .hero {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-top: 64px;
    padding-bottom: 76px;
    gap: 34px;
  }
  .eyebrow {
    font-size: 10px;
    margin-bottom: 24px;
  }
  h1 {
    font-size: clamp(50px, 10vw, 73px);
    line-height: 1.25;
  }
  .hero-description {
    font-size: 12px;
    margin-top: 23px;
  }
  .hero-actions {
    margin-top: 31px;
    gap: 27px;
  }
  .button {
    min-height: 49px;
    font-size: 12px;
    gap: 35px;
    padding: 13px 18px;
  }
  .text-link {
    font-size: 11px;
    gap: 18px;
  }
  .hero-art {
    width: min(100%, 405px);
    justify-self: end;
    margin-top: -8px;
  }
  .art-caption {
    font-size: 8px;
  }
  .scroll-cue {
    bottom: 24px;
    font-size: 9px;
  }
  .provider-strip {
    align-items: flex-start;
    flex-direction: column;
    padding-block: 28px;
    gap: 25px;
  }
  .provider-strip p {
    font-size: 10px;
  }
  .provider-strip ul {
    width: 100%;
    justify-content: space-between;
    gap: 22px;
    font-size: 21px;
  }
  .provider-strip li:first-child {
    font-size: 24px;
  }
  .connect {
    grid-template-columns: 1fr;
    gap: 30px;
    padding-block: 72px 68px;
  }
  .connect .eyebrow {
    margin-bottom: 21px;
  }
  h2 {
    font-size: 29px;
  }
  .connect-detail {
    padding-top: 0;
  }
  .connect-description {
    font-size: 12px;
  }
  .endpoint-row input {
    font-size: 13px;
  }
  .site-footer {
    padding-top: 28px;
  }
  .footer-wordmark {
    font-size: 36px;
  }
  .footer-top p {
    font-size: 9px;
  }
  .footer-bottom {
    margin-top: 34px;
    font-size: 8px;
    gap: 9px;
  }
  .footer-bottom > span:nth-child(2) {
    order: 3;
    width: 100%;
  }
  html:not([lang^="zh"]):not([lang="ja"]) h1 {
    font-size: clamp(49px, 11vw, 74px);
  }
  html:not([lang^="zh"]):not([lang="ja"]) h1 span {
    max-width: 12ch;
  }
  html[lang="ru"] h1 {
    font-size: clamp(40px, 8.5vw, 60px);
  }
}
@media (max-width: 380px) {
  .brand-origin {
    display: none;
  }
  .hero-actions {
    gap: 20px;
  }
  h1 {
    font-size: 47px;
  }
  .provider-strip ul {
    font-size: 19px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation: none !important;
    transition: none !important;
  }
  .has-observer .reveal {
    opacity: 1;
    transform: none;
  }
}

.embedded .site-header {
  display: none;
}
.embedded .hero {
  padding-top: 65px;
}
html.embedded[data-theme="dark"] {
  color-scheme: dark;
  --paper: #181818;
  --ink: #f8f8f8;
  --muted: #b0b0b0;
  --line: #3c3c3c;
}
.embedded[data-theme="dark"] .button-dark,
.embedded[data-theme="dark"] .skip-link {
  color: #181818;
}
.embedded[data-theme="dark"] .button-dark:hover {
  background: #dedede;
}
.embedded[data-theme="dark"] .hero-art {
  color: #aaaaaa;
}
.embedded[data-theme="dark"] .art-frame {
  stroke: #424242;
}
.embedded[data-theme="dark"] .art-guide {
  stroke: #333333;
}
.embedded[data-theme="dark"] .signal-detail {
  stroke: #909090;
}
.embedded[data-theme="dark"] .art-caption {
  color: #a0a0a0;
}
.embedded[data-theme="dark"] .caption-line {
  background: #777777;
}
.embedded[data-theme="dark"] .muted {
  color: #a8a8a8;
}
.embedded[data-theme="dark"] .connect-description,
.embedded[data-theme="dark"] .copy-status {
  color: #b8b8b8;
}
.embedded[data-theme="dark"] .endpoint-row {
  border-bottom-color: #686868;
}
.embedded[data-theme="dark"] .endpoint-row button:hover {
  background: #333333;
}
html[lang="ja"] h1 {
  font-size: clamp(34px, 4.5vw, 67px);
}
@media (max-width: 760px) {
  html[lang="ja"] h1 {
    font-size: clamp(30px, 6.8vw, 51px);
  }
}