:root {
  --color-background: #ffffff;
  --color-surface: #f8fafc;
  --color-text: #101828;
  --color-muted: #667085;
  --color-blue: #1267e5;
  --color-blue-dark: #0b1f3a;
  --color-blue-light: #5ea0ff;
  --color-blue-pale: #eaf3ff;
  --color-red: #e31b23;
  --color-border: #d7e3f1;
  --font-sans: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, "Noto Sans SC", "Microsoft YaHei", sans-serif;
}

* { box-sizing: border-box; }
html { width: 100%; min-width: 320px; overflow-x: clip; background: var(--color-background); }
body {
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  min-height: 100svh;
  margin: 0;
  overflow-x: clip;
  color: var(--color-text);
  background: radial-gradient(circle at 50% 42%, #fff 0 32%, #fbfdff 74%, #f7faff 100%);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
}
button { font: inherit; }

.site-header {
  position: fixed;
  z-index: 10;
  inset: 0 0 auto;
  height: 74px;
  pointer-events: none;
}
.language-switcher {
  position: absolute;
  top: clamp(20px, 3.5vh, 38px);
  right: clamp(22px, 4.7vw, 76px);
  display: flex;
  align-items: center;
  gap: 14px;
  pointer-events: auto;
}
.language-button {
  padding: 5px 2px;
  border: 0;
  color: var(--color-muted);
  background: transparent;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: .06em;
  cursor: pointer;
  transition: color .2s ease;
}
.language-button[aria-pressed="true"] { color: var(--color-blue-dark); }
.language-button[aria-pressed="true"]::after {
  display: block;
  width: 14px;
  height: 2px;
  margin: 3px auto -5px;
  border-radius: 2px;
  background: var(--color-blue);
  content: "";
}
.language-divider { width: 1px; height: 17px; background: #c7d1df; }
.language-button:hover { color: var(--color-blue); }
.language-button:focus-visible { outline: 2px solid var(--color-blue); outline-offset: 5px; border-radius: 2px; }

.landing { position: relative; z-index: 2; min-height: 100vh; min-height: 100svh; display: grid; place-items: center; padding: 28px 24px 72px; }
.hero { width: min(850px, 100%); text-align: center; }
.brand-mark {
  position: relative;
  display: grid;
  place-items: center;
  width: 172px;
  height: 124px;
  margin: 0 auto 12px;
  border-radius: 28px 7px 28px 7px;
  background: var(--color-blue-dark);
  box-shadow: 0 10px 28px rgba(11,31,58,.12);
}
.brand-mark::after { position: absolute; top: 8px; right: 8px; width: 7px; height: 7px; border-radius: 50%; background: var(--color-red); content: ""; }
.brand-mark img { display: block; width: 144px; height: auto; }
.company-name { margin: 0; color: var(--color-blue-dark); font-size: clamp(22px, 2.5vw, 30px); font-weight: 680; letter-spacing: -.02em; }
.product-line { margin: 7px 0 0; color: #53647b; font-size: clamp(12px, 1.3vw, 15px); letter-spacing: .01em; }
.product-line span { margin: 0 .35em; color: #a9b9cd; }
.mechanism { width: clamp(230px, 25vw, 286px); max-width: 100%; margin: clamp(7px, 1.2vh, 12px) auto clamp(5px, 1vh, 10px); overflow: hidden; }
.mechanism svg { display: block; width: 100%; max-width: 100%; overflow: hidden; }
.orbit { fill: none; transform-origin: 150px 150px; }
.orbit-faint { stroke: #d7e5f6; stroke-width: 1.2; stroke-dasharray: 2 7; }
.orbit-blue { stroke: var(--color-blue); stroke-width: 1.7; stroke-dasharray: 42 58; stroke-linecap: round; animation: orbit-spin 15s linear infinite; }
.orbit-red { stroke: var(--color-red); stroke-width: 1.9; stroke-dasharray: 12 88; stroke-dashoffset: -57; stroke-linecap: round; animation: orbit-spin-reverse 20s linear infinite; }
.orbiting-points { transform-origin: 150px 150px; animation: orbit-spin 15s linear infinite; }
.point-blue { fill: var(--color-blue); }.point-red { fill: var(--color-red); }
.gear { transform-box: view-box; }
.gear-large { transform-origin: 139px 131px; animation: gear-spin 28s linear infinite; }
.gear-top { transform-origin: 212px 92px; animation: gear-spin-reverse 13s linear infinite; }
.gear-bottom { transform-origin: 205px 225px; animation: gear-spin-reverse 15s linear infinite; }
.gear-tiny { transform-origin: 72px 222px; animation: gear-spin-reverse 11s linear infinite; }
.gear path { fill: #fff; stroke: url(#gear-stroke); stroke-width: 1.6; stroke-linejoin: round; }
.gear circle { fill: #fbfdff; stroke: #9cbbe0; stroke-width: 1.5; }
.gear .hub { fill: var(--color-blue-pale); stroke: var(--color-blue); stroke-width: 1.2; }
.ticks { fill: #aab9cc; stroke: #c9d8eb; stroke-width: 1.2; stroke-dasharray: 2 6; }
.copy { position: relative; }
[data-i18n].is-typing::after {
  display: inline-block;
  width: 1px;
  height: .95em;
  margin-left: 3px;
  vertical-align: -.08em;
  background: var(--color-blue);
  animation: caret-blink .7s steps(1) infinite;
  content: "";
}
.eyebrow { margin: 0 0 7px; color: var(--color-blue); font-size: 10px; font-weight: 750; letter-spacing: .2em; }
h1 { margin: 0; color: var(--color-blue-dark); font-size: clamp(30px, 4.2vw, 50px); line-height: 1.1; letter-spacing: -.035em; font-weight: 700; }
.supporting-copy { margin: 12px auto 0; color: var(--color-muted); font-size: clamp(14px, 1.55vw, 17px); line-height: 1.65; }

.flow-lines { position: fixed; z-index: 0; right: 0; bottom: 0; left: 0; height: min(29vh, 280px); pointer-events: none; }
.flow-lines svg { display: block; width: 100%; height: 100%; overflow: visible; fill: var(--color-blue-light); opacity: .62; }
.flow-strokes { fill: none; stroke: #99c2fa; stroke-width: 1; opacity: .34; }
.flow-strokes path:nth-child(even) { stroke: #c4dbf9; }
.flow-lines .accent-dot { fill: var(--color-red); opacity: .7; }
.site-footer { position: fixed; z-index: 3; right: 0; bottom: 13px; left: 0; text-align: center; color: #8190a4; font-size: 11px; letter-spacing: .015em; }
.site-footer p { margin: 0; }

html[lang="zh-CN"] .company-name { letter-spacing: 0; }
html[lang="zh-CN"] h1 { letter-spacing: .02em; }
html[lang="zh-CN"] .supporting-copy { line-height: 1.8; }

@keyframes gear-spin { to { transform: rotate(360deg); } }
@keyframes gear-spin-reverse { to { transform: rotate(-360deg); } }
@keyframes orbit-spin { to { transform: rotate(360deg); } }
@keyframes orbit-spin-reverse { to { transform: rotate(-360deg); } }
@keyframes caret-blink { 50% { opacity: 0; } }

@media (max-height: 800px) and (min-width: 700px) {
  .landing { padding-top: 22px; padding-bottom: 48px; }
  .brand-mark { width: 116px; height: 84px; margin-bottom: 7px; border-radius: 20px 5px; }
  .brand-mark img { width: 98px; }
  .company-name { font-size: 23px; }
  .product-line { margin-top: 4px; }
  .mechanism { width: 200px; margin: 1px auto 2px; }
  .eyebrow { margin-bottom: 5px; }
  h1 { font-size: 36px; }
  .supporting-copy { margin-top: 7px; font-size: 14px; line-height: 1.5; }
}
@media (max-width: 600px) {
  .site-header { height: 58px; }
  .language-switcher { top: 15px; right: 18px; gap: 10px; }
  .language-button { font-size: 12px; }
  .landing { place-items: start center; width: 100%; max-width: 100%; padding: 58px 16px 52px; overflow: hidden; }
  .hero { min-width: 0; max-width: 100%; }
  .brand-mark { width: 132px; height: 95px; margin-bottom: 8px; border-radius: 22px 6px; }
  .brand-mark img { width: 110px; }
  .product-line { max-width: 340px; margin: 6px auto 0; line-height: 1.55; }
  .product-line { min-height: 38px; }
  .copy { min-height: 132px; }
  .mechanism { width: min(66vw, 240px); margin: 7px auto 5px; }
  h1 { font-size: clamp(28px, 8.2vw, 36px); }
  .supporting-copy { max-width: 350px; margin-top: 10px; line-height: 1.55; }
  .flow-lines { height: 20vh; opacity: .7; }
}
@media (max-height: 680px) and (max-width: 600px) {
  .landing { padding-top: 52px; }
  .brand-mark { width: 104px; height: 75px; }
  .brand-mark img { width: 87px; }
  .mechanism { width: 170px; margin-top: 2px; margin-bottom: 1px; }
  .product-line { font-size: 11px; }
  .supporting-copy { font-size: 13px; }
}
@media (prefers-reduced-motion: reduce) {
  .gear, .orbit-blue, .orbit-red, .orbiting-points { animation: none; }
  *, *::before, *::after { scroll-behavior: auto !important; transition-duration: .01ms !important; }
}