:root {
  --background: #ffffff;
  --text: #101113;
  --muted: #6f7175;
  --faint: #a9abad;
  --line: #dedfe1;
  --line-strong: #c9cace;
  --accent: #ff6800;
  --header-height: 82px;
  --gutter: clamp(22px, 3.2vw, 52px);
  --content-max: 1600px;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
  font-family:
    Inter, "SF Pro Display", "SF Pro Text", "PingFang SC",
    "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
  color: var(--text);
  background: var(--background);
  font-synthesis: none;
  text-rendering: optimizeLegibility;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  margin: 0;
  min-width: 320px;
  color: var(--text);
  background: var(--background);
  -webkit-font-smoothing: antialiased;
}

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

.skip-link {
  position: fixed;
  z-index: 100;
  top: 10px;
  left: 10px;
  padding: 10px 14px;
  color: #fff;
  background: var(--text);
  transform: translateY(-150%);
  transition: transform 180ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  z-index: 20;
  top: 0;
  left: 0;
  display: flex;
  width: 100%;
  height: var(--header-height);
  align-items: center;
  padding: 0 var(--gutter);
  border-bottom: 1px solid rgb(222 223 225 / 86%);
  background: #fff;
}

.wordmark {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  font-size: clamp(21px, 2vw, 29px);
  font-weight: 750;
  letter-spacing: -0.055em;
  line-height: 1;
}

.wordmark-spark {
  position: relative;
}

.wordmark-spark::after {
  position: absolute;
  right: 39%;
  bottom: 1%;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
  content: "";
  transform: translateX(50%);
}

.header-divider {
  width: 1px;
  height: 29px;
  margin: 0 26px;
  background: var(--line-strong);
}

.header-domain {
  min-height: 44px;
  padding: 13px 0;
  color: #3e4044;
  font-size: 15px;
  letter-spacing: -0.01em;
}

.site-nav {
  display: flex;
  gap: clamp(24px, 3vw, 48px);
  margin-left: auto;
  font-size: 15px;
}

.site-nav a {
  position: relative;
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  color: #393b3f;
  transition: color 180ms ease;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 4px;
  left: 0;
  height: 1px;
  background: var(--accent);
  content: "";
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 260ms var(--ease-out);
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--accent);
}

.site-nav a:hover::after,
.site-nav a[aria-current="page"]::after {
  transform: scaleX(1);
}

.hero {
  position: relative;
  display: grid;
  min-height: max(698px, calc(100svh - var(--header-height)));
  grid-template-columns: minmax(0, 47%) minmax(0, 53%);
  align-items: center;
  overflow: hidden;
  padding: 64px var(--gutter) 92px;
  border-bottom: 1px solid var(--line);
}

.hero-copy {
  position: relative;
  z-index: 2;
  padding-left: clamp(14px, 3.4vw, 58px);
}

.hero h1 {
  max-width: none;
  margin: 0;
  font-size: clamp(58px, 4.75vw, 78px);
  font-weight: 590;
  letter-spacing: -0.072em;
  line-height: 1.12;
  white-space: nowrap;
}

.hero h1 span {
  display: inline;
}

.hero h1 span + span {
  margin-left: 0.5em;
}

.hero-copy > p {
  margin: 36px 0 0;
  color: var(--muted);
  font-size: clamp(18px, 1.72vw, 28px);
  font-weight: 340;
  letter-spacing: -0.025em;
  line-height: 1.72;
}

.text-link {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  gap: 16px;
  margin-top: 34px;
  border-bottom: 1px solid var(--accent);
  color: var(--accent);
  font-size: 18px;
  line-height: 1;
  transition: gap 220ms var(--ease-out);
}

.text-link:hover {
  gap: 23px;
}

.text-link svg {
  width: 27px;
  overflow: visible;
}

.text-link path {
  fill: none;
  stroke: currentColor;
  stroke-linecap: round;
  stroke-linejoin: round;
  stroke-width: 1.2;
}

.orbit-stage {
  position: absolute;
  z-index: 1;
  top: var(--header-height);
  right: -9vw;
  bottom: 0;
  width: min(64vw, 980px);
  pointer-events: none;
}

.orbit-stage::before {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    #fff 0%,
    rgb(255 255 255 / 92%) 8%,
    rgb(255 255 255 / 0%) 28%
  );
  content: "";
}

.orbit-art {
  width: 100%;
  height: 100%;
  overflow: visible;
}

.orbit-lines > * {
  fill: none;
  stroke: #bbbcc0;
  stroke-width: 1;
}

.orbit-lines line {
  stroke: #d4d5d7;
}

.spark-rings circle {
  fill: none;
  stroke: #ffb07a;
  stroke-width: 1;
}

.orbit-points circle {
  fill: #303236;
}

.spark-core {
  fill: var(--accent);
  transform-origin: 430px 358px;
  animation: spark-pulse 3.8s ease-in-out infinite;
}

.section-cue {
  position: absolute;
  right: var(--gutter);
  bottom: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  color: var(--faint);
  font-size: 11px;
  letter-spacing: 0.18em;
  writing-mode: vertical-rl;
}

.cue-line {
  width: 1px;
  height: 58px;
  background: var(--line-strong);
}

.about {
  display: grid;
  min-height: 820px;
  grid-template-columns: minmax(0, 52%) minmax(0, 48%);
  padding: 116px var(--gutter) 94px;
}

.about-intro {
  position: relative;
  min-height: 620px;
  padding-left: clamp(14px, 2.2vw, 34px);
  overflow: hidden;
}

.about h2 {
  margin: 0;
  font-size: clamp(76px, 8.2vw, 132px);
  font-weight: 530;
  letter-spacing: -0.075em;
  line-height: 1;
}

.about-trajectory {
  position: absolute;
  top: 255px;
  right: 9%;
  bottom: 0;
  left: -18%;
}

.about-trajectory::before {
  position: absolute;
  top: 38%;
  left: -4%;
  width: 84%;
  height: 56%;
  border: 1px solid #c5c6c9;
  border-radius: 50%;
  content: "";
  transform: rotate(24deg);
}

.trajectory-line {
  position: absolute;
  top: 32%;
  left: 32%;
  width: 42%;
  border-top: 1px dashed #bfc0c3;
  transform: rotate(-28deg);
  transform-origin: left;
}

.trajectory-spark {
  position: absolute;
  top: 15%;
  left: 64%;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 6px rgb(255 104 0 / 5%);
}

.about-content {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 9px clamp(14px, 4vw, 70px) 0 0;
}

.about-statement {
  max-width: 680px;
  margin: 0;
  font-size: clamp(22px, 2vw, 32px);
  font-weight: 350;
  letter-spacing: -0.035em;
  line-height: 1.85;
}

.company-facts {
  width: 100%;
  max-width: 710px;
  margin: 76px 0 0;
}

.company-facts > div {
  display: grid;
  grid-template-columns: minmax(104px, 28%) 1fr;
  padding: 23px 0;
  border-bottom: 1px solid var(--line-strong);
}

.company-facts dt {
  color: var(--muted);
  font-size: 17px;
}

.company-facts dd {
  margin: 0;
  font-size: 19px;
}

.company-facts a {
  text-decoration: underline;
  text-decoration-color: transparent;
  text-underline-offset: 4px;
  transition: color 180ms ease, text-decoration-color 180ms ease;
}

.company-facts a:hover {
  color: var(--accent);
  text-decoration-color: currentColor;
}

.english-line {
  margin: auto 0 4px;
  font-size: clamp(38px, 4.15vw, 66px);
  font-weight: 390;
  letter-spacing: -0.055em;
  line-height: 1.08;
}

.site-footer {
  display: flex;
  min-height: 96px;
  align-items: center;
  justify-content: space-between;
  margin: 0 var(--gutter);
  border-top: 1px solid var(--line-strong);
  color: var(--muted);
  font-size: 14px;
}

.site-footer a {
  min-height: 44px;
  padding: 13px 0;
}

@keyframes spark-pulse {
  0%,
  100% {
    transform: scale(1);
  }
  50% {
    transform: scale(1.32);
  }
}

@media (max-width: 980px) {
  :root {
    --header-height: 74px;
  }

  .header-divider,
  .header-domain {
    display: none;
  }

  .hero {
    min-height: max(746px, calc(100svh - var(--header-height)));
    grid-template-columns: 1fr;
    align-items: flex-start;
    padding-top: 92px;
  }

  .hero-copy {
    padding-left: 0;
  }

  .hero h1 {
    font-size: clamp(52px, 9.2vw, 78px);
    white-space: normal;
  }

  .orbit-stage {
    top: 42%;
    right: -25%;
    bottom: -9%;
    width: 88vw;
    min-width: 700px;
  }

  .about {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 68px;
    padding-top: 94px;
  }

  .about-intro {
    min-height: 390px;
    padding-left: 0;
  }

  .about-trajectory {
    top: 124px;
    right: 2%;
    left: 8%;
  }

  .about-content {
    min-height: 600px;
    padding-right: 0;
  }

  .english-line {
    margin-top: 88px;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 66px;
    --gutter: 20px;
  }

  .site-header {
    padding-right: var(--gutter);
    padding-left: var(--gutter);
  }

  .wordmark {
    font-size: 21px;
  }

  .site-nav {
    gap: 20px;
    font-size: 13px;
  }

  .site-nav a:first-child {
    display: none;
  }

  .hero {
    min-height: max(694px, calc(100svh - var(--header-height)));
    padding-top: 82px;
    padding-bottom: 72px;
  }

  .hero h1 {
    max-width: 480px;
    font-size: clamp(48px, 15.7vw, 68px);
    letter-spacing: -0.08em;
    line-height: 1.14;
  }

  .hero h1 span {
    display: block;
  }

  .hero h1 span + span {
    margin-left: 0;
  }

  .hero-copy > p {
    max-width: 360px;
    margin-top: 30px;
    font-size: 17px;
    line-height: 1.8;
  }

  .desktop-break {
    display: none;
  }

  .text-link {
    margin-top: 26px;
    font-size: 16px;
  }

  .orbit-stage {
    top: 43%;
    right: -89%;
    width: 168vw;
    min-width: 650px;
    opacity: 0.9;
  }

  .section-cue {
    display: none;
  }

  .about {
    gap: 44px;
    padding-top: 76px;
    padding-bottom: 72px;
  }

  .about h2 {
    font-size: clamp(62px, 20vw, 86px);
  }

  .about-intro {
    min-height: 320px;
  }

  .about-trajectory {
    top: 92px;
    right: -35%;
    bottom: -8%;
    left: -30%;
  }

  .trajectory-spark {
    width: 14px;
    height: 14px;
  }

  .about-content {
    min-height: auto;
  }

  .about-statement {
    font-size: 20px;
    line-height: 1.85;
  }

  .company-facts {
    margin-top: 54px;
  }

  .company-facts > div {
    grid-template-columns: 1fr;
    gap: 10px;
    padding: 19px 0;
  }

  .company-facts dt {
    font-size: 13px;
  }

  .company-facts dd {
    font-size: 17px;
    line-height: 1.6;
  }

  .english-line {
    max-width: 320px;
    margin-top: 72px;
    font-size: 44px;
    line-height: 1.06;
  }

  .site-footer {
    min-height: 116px;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    gap: 4px;
    font-size: 12px;
  }

  .site-footer p {
    margin: 0;
  }
}

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

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

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 5px;
}