:root {
  --ink: #f4f7fb;
  --muted: #9eabba;
  --deep: #050b14;
  --navy: #07111f;
  --panel: rgba(14, 29, 46, 0.68);
  --line: rgba(183, 214, 235, 0.16);
  --cyan: #77e8dc;
  --sky: #71b7ff;
  --violet: #8579f8;
  --accent-gradient: linear-gradient(125deg, var(--cyan), var(--sky) 54%, var(--violet));
  --shadow: 0 26px 90px rgba(0, 0, 0, 0.38);
  --radius-lg: 30px;
  --radius-md: 20px;
  --content: min(1180px, calc(100vw - 48px));
  --font: Inter, "PingFang SC", "Microsoft YaHei", system-ui, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    radial-gradient(circle at 78% 12%, rgba(62, 91, 170, 0.18), transparent 28%),
    radial-gradient(circle at 8% 36%, rgba(57, 183, 169, 0.1), transparent 25%),
    var(--deep);
  font-family: var(--font);
  min-width: 320px;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(to bottom, #000, transparent 86%);
}

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

button,
a {
  -webkit-tap-highlight-color: transparent;
}

.page-glow {
  position: fixed;
  top: 0;
  right: 0;
  z-index: -1;
  width: 46vw;
  height: 46vw;
  border-radius: 50%;
  background: rgba(84, 131, 255, 0.06);
  filter: blur(100px);
  pointer-events: none;
}

.site-header {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 20;
  display: flex;
  width: var(--content);
  min-height: 68px;
  align-items: center;
  justify-content: space-between;
  padding: 11px 14px 11px 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: rgba(5, 11, 20, 0.72);
  box-shadow: 0 18px 60px rgba(0, 0, 0, 0.22);
  backdrop-filter: blur(22px);
  transform: translateX(-50%);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.brand img {
  filter: drop-shadow(0 0 18px rgba(119, 232, 220, 0.18));
}

.brand span {
  display: grid;
  gap: 2px;
}

.brand strong {
  font-size: 0.84rem;
  letter-spacing: 0.16em;
}

.brand small {
  color: var(--muted);
  font-size: 0.7rem;
  letter-spacing: 0.18em;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.main-nav a {
  position: relative;
  color: #c6d0db;
  font-size: 0.84rem;
  transition: color 180ms ease;
}

.main-nav a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 1px;
  content: "";
  background: var(--cyan);
  transform: scaleX(0);
  transition: transform 180ms ease;
}

.main-nav a:hover,
.main-nav a:focus-visible {
  color: #fff;
}

.main-nav a:hover::after,
.main-nav a:focus-visible::after {
  transform: scaleX(1);
}

.language-switch {
  min-width: 46px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: 12px;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.05);
  font: 700 0.72rem/1 var(--font);
  letter-spacing: 0.12em;
  cursor: pointer;
  transition: border-color 180ms ease, background 180ms ease, transform 180ms ease;
}

.language-switch:hover,
.language-switch:focus-visible {
  border-color: rgba(119, 232, 220, 0.56);
  background: rgba(119, 232, 220, 0.1);
  transform: translateY(-2px);
}

.hero {
  position: relative;
  display: grid;
  width: var(--content);
  min-height: 100svh;
  margin: 0 auto;
  padding: 146px 0 90px;
  grid-template-columns: minmax(0, 1.08fr) minmax(390px, 0.92fr);
  align-items: center;
  gap: 48px;
}

.hero-copy {
  max-width: 690px;
}

.eyebrow {
  margin: 0 0 22px;
  color: var(--cyan);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.23em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 760px;
  margin-bottom: 28px;
  font-size: clamp(3.4rem, 6.6vw, 6.9rem);
  font-weight: 650;
  line-height: 0.98;
  letter-spacing: -0.07em;
}

.hero-intro {
  max-width: 620px;
  margin-bottom: 38px;
  color: #aebac8;
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  line-height: 1.9;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.button {
  display: inline-flex;
  min-width: 142px;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  border-radius: 14px;
  font-size: 0.9rem;
  font-weight: 700;
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-3px);
}

.button-primary {
  color: #041017;
  background: var(--accent-gradient);
  box-shadow: 0 16px 42px rgba(78, 191, 210, 0.16);
}

.button-primary:hover,
.button-primary:focus-visible {
  box-shadow: 0 20px 52px rgba(78, 191, 210, 0.25);
}

.button-secondary {
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
}

.button-secondary:hover,
.button-secondary:focus-visible {
  border-color: rgba(119, 232, 220, 0.5);
}

.orbit-stage {
  position: relative;
  width: 100%;
  aspect-ratio: 1;
  max-width: 510px;
  justify-self: end;
}

.orbit-stage::before {
  position: absolute;
  inset: 17%;
  border-radius: 50%;
  content: "";
  background: radial-gradient(circle, rgba(113, 183, 255, 0.2), rgba(113, 183, 255, 0.02) 55%, transparent 72%);
  filter: blur(12px);
}

.orbit {
  position: absolute;
  inset: 8%;
  border: 1px solid rgba(155, 203, 234, 0.2);
  border-radius: 50%;
  animation: spin 20s linear infinite;
}

.orbit span {
  position: absolute;
  top: 50%;
  left: -5px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 24px var(--cyan);
}

.orbit-two {
  inset: 20%;
  border-color: rgba(133, 121, 248, 0.28);
  animation-duration: 13s;
  animation-direction: reverse;
}

.orbit-two span {
  top: 12%;
  left: 80%;
  width: 7px;
  height: 7px;
  background: var(--violet);
  box-shadow: 0 0 20px var(--violet);
}

.orbit-three {
  inset: 2% 26%;
  border-color: rgba(113, 183, 255, 0.18);
  transform: rotate(62deg);
  animation-duration: 28s;
}

.orbit-three span {
  top: 83%;
  left: 83%;
  width: 6px;
  height: 6px;
  background: var(--sky);
  box-shadow: 0 0 18px var(--sky);
}

.core-mark {
  position: absolute;
  inset: 34%;
  display: grid;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 34%;
  background: linear-gradient(145deg, rgba(18, 44, 66, 0.9), rgba(8, 17, 29, 0.8));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.08), 0 30px 90px rgba(0, 0, 0, 0.42);
  transform: rotate(45deg);
}

.core-mark img {
  width: 72%;
  height: 72%;
  transform: rotate(-45deg);
}

.orbit-stage > p {
  position: absolute;
  right: 0;
  bottom: 2%;
  margin: 0;
  color: #607080;
  font-size: 0.62rem;
  letter-spacing: 0.28em;
}

.scroll-cue {
  position: absolute;
  bottom: 32px;
  left: 0;
  display: flex;
  align-items: center;
  gap: 14px;
  color: #667687;
}

.scroll-cue span {
  width: 46px;
  height: 1px;
  background: var(--line);
  overflow: hidden;
}

.scroll-cue span::after {
  display: block;
  width: 50%;
  height: 100%;
  content: "";
  background: var(--cyan);
  animation: scan 2s ease-in-out infinite;
}

.scroll-cue small {
  font-size: 0.58rem;
  letter-spacing: 0.25em;
}

.section {
  width: var(--content);
  margin: 0 auto;
  padding: 128px 0;
}

.section-label {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 70px;
  color: #657789;
}

.section-label span {
  color: var(--cyan);
  font-size: 0.7rem;
}

.section-label p {
  margin: 0;
  font-size: 0.66rem;
  letter-spacing: 0.24em;
}

.section-label::after {
  width: 88px;
  height: 1px;
  content: "";
  background: var(--line);
}

.about-grid,
.company-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(360px, 0.78fr);
  justify-content: space-between;
  gap: 90px;
}

.section-heading h2,
.focus-heading h2,
.principle-panel h2 {
  margin-bottom: 0;
  font-size: clamp(2.3rem, 4.2vw, 4.8rem);
  font-weight: 580;
  line-height: 1.1;
  letter-spacing: -0.055em;
}

.about-copy {
  padding-top: 39px;
}

.about-copy p {
  margin-bottom: 28px;
  color: #aeb9c5;
  font-size: 1.04rem;
  line-height: 2;
}

.focus {
  padding-bottom: 170px;
}

.focus-heading {
  max-width: 790px;
  margin-bottom: 64px;
}

.focus-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.focus-card {
  position: relative;
  min-height: 350px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: linear-gradient(155deg, rgba(19, 38, 58, 0.76), rgba(8, 17, 29, 0.62));
  box-shadow: inset 0 1px rgba(255, 255, 255, 0.04);
  overflow: hidden;
  transition: transform 220ms ease, border-color 220ms ease, box-shadow 220ms ease;
}

.focus-card::before {
  position: absolute;
  inset: auto -20% -42% 22%;
  height: 75%;
  border-radius: 50%;
  content: "";
  background: rgba(76, 158, 195, 0.1);
  filter: blur(42px);
  transition: background 220ms ease;
}

.focus-card:hover {
  border-color: rgba(119, 232, 220, 0.34);
  box-shadow: var(--shadow);
  transform: translateY(-9px);
}

.focus-card:hover::before {
  background: rgba(83, 210, 193, 0.16);
}

.card-index {
  color: #607284;
  font-size: 0.65rem;
  letter-spacing: 0.16em;
}

.card-symbol {
  position: relative;
  width: 96px;
  height: 96px;
  margin: 45px 0 36px;
}

.symbol-product {
  border: 1px solid rgba(119, 232, 220, 0.5);
  border-radius: 24px;
  box-shadow: inset 0 0 32px rgba(119, 232, 220, 0.08);
  transform: rotate(12deg);
}

.symbol-product::before,
.symbol-product::after {
  position: absolute;
  width: 34px;
  height: 34px;
  border: 1px solid rgba(113, 183, 255, 0.6);
  border-radius: 11px;
  content: "";
}

.symbol-product::before {
  top: 15px;
  left: 15px;
}

.symbol-product::after {
  right: 15px;
  bottom: 15px;
}

.symbol-system {
  border: 1px solid rgba(113, 183, 255, 0.5);
  border-radius: 50%;
}

.symbol-system::before,
.symbol-system::after {
  position: absolute;
  border: 1px solid rgba(133, 121, 248, 0.64);
  border-radius: 50%;
  content: "";
}

.symbol-system::before {
  inset: 18px -12px;
}

.symbol-system::after {
  inset: -12px 18px;
}

.symbol-global {
  border: 1px solid rgba(133, 121, 248, 0.6);
  border-radius: 50%;
  background:
    linear-gradient(90deg, transparent 47%, rgba(119, 232, 220, 0.5) 49%, rgba(119, 232, 220, 0.5) 51%, transparent 53%),
    linear-gradient(transparent 47%, rgba(113, 183, 255, 0.48) 49%, rgba(113, 183, 255, 0.48) 51%, transparent 53%);
}

.symbol-global::after {
  position: absolute;
  inset: 20px -1px;
  border: 1px solid rgba(119, 232, 220, 0.48);
  border-radius: 50%;
  content: "";
}

.focus-card h3 {
  position: relative;
  margin-bottom: 14px;
  font-size: 1.35rem;
}

.focus-card p {
  position: relative;
  max-width: 300px;
  margin-bottom: 0;
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.8;
}

.principle {
  width: min(1320px, calc(100vw - 32px));
  padding: 0 0 128px;
}

.principle-panel {
  position: relative;
  min-height: 580px;
  padding: clamp(54px, 8vw, 110px);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background:
    radial-gradient(circle at 76% 50%, rgba(61, 174, 180, 0.15), transparent 23%),
    linear-gradient(125deg, rgba(12, 29, 46, 0.98), rgba(8, 17, 29, 0.9));
  box-shadow: var(--shadow);
  overflow: hidden;
}

.principle-panel::after {
  position: absolute;
  top: -24%;
  right: -5%;
  width: 54%;
  aspect-ratio: 1;
  border: 1px solid rgba(119, 232, 220, 0.16);
  border-radius: 50%;
  content: "";
  box-shadow:
    0 0 0 70px rgba(113, 183, 255, 0.035),
    0 0 0 140px rgba(133, 121, 248, 0.025);
}

.principle-panel h2 {
  position: relative;
  z-index: 1;
  max-width: 770px;
}

.principle-line {
  position: relative;
  z-index: 1;
  width: min(460px, 70%);
  height: 1px;
  margin: 68px 0 32px;
  background: var(--line);
}

.principle-line span {
  display: block;
  width: 34%;
  height: 100%;
  background: var(--accent-gradient);
}

.principle-panel > p:last-child {
  position: relative;
  z-index: 1;
  max-width: 650px;
  margin-bottom: 0;
  color: #a7b4c1;
  font-size: 1rem;
  line-height: 1.9;
}

.company {
  padding-top: 40px;
}

.company-facts {
  margin: 0;
  border-top: 1px solid var(--line);
}

.company-facts div {
  display: grid;
  padding: 24px 0;
  border-bottom: 1px solid var(--line);
  grid-template-columns: 120px 1fr;
  gap: 24px;
}

.company-facts dt {
  color: #718294;
  font-size: 0.75rem;
}

.company-facts dd {
  margin: 0;
  font-size: 1rem;
  line-height: 1.7;
}

.company-facts dd span {
  color: var(--muted);
}

.site-footer {
  display: flex;
  width: var(--content);
  margin: 0 auto;
  padding: 46px 0 54px;
  border-top: 1px solid var(--line);
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 18px;
}

.footer-brand strong {
  font-size: 0.82rem;
  letter-spacing: 0.11em;
}

.footer-brand p,
.footer-meta p {
  margin: 7px 0 0;
  color: #68798a;
  font-size: 0.72rem;
}

.footer-meta {
  text-align: right;
}

.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.2, 0.75, 0.2, 1);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes scan {
  from { transform: translateX(-120%); }
  to { transform: translateX(310%); }
}

@media (max-width: 900px) {
  :root {
    --content: min(100% - 32px, 720px);
  }

  .main-nav {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 156px;
    grid-template-columns: 1fr;
  }

  .hero-copy {
    position: relative;
    z-index: 2;
  }

  h1 {
    font-size: clamp(3.1rem, 12vw, 5.5rem);
  }

  .orbit-stage {
    width: min(100%, 480px);
    margin: -16px auto 10px;
    justify-self: center;
  }

  .scroll-cue {
    display: none;
  }

  .section {
    padding: 100px 0;
  }

  .about-grid,
  .company-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .about-copy {
    padding-top: 0;
  }

  .focus-grid {
    grid-template-columns: 1fr;
  }

  .focus-card {
    min-height: 300px;
  }

  .principle {
    width: calc(100vw - 20px);
  }
}

@media (max-width: 560px) {
  .site-header {
    top: 10px;
    min-height: 62px;
    border-radius: 16px;
  }

  .brand img {
    width: 36px;
    height: 36px;
  }

  .brand strong {
    font-size: 0.72rem;
  }

  .brand small {
    font-size: 0.62rem;
  }

  .hero {
    padding-top: 130px;
  }

  h1 {
    letter-spacing: -0.06em;
  }

  .hero-intro {
    line-height: 1.75;
  }

  .orbit-stage {
    width: 100%;
    margin-left: auto;
    overflow: clip;
  }

  .section-label {
    margin-bottom: 46px;
  }

  .focus-card {
    min-height: 320px;
    padding: 26px;
  }

  .principle-panel {
    min-height: 520px;
    padding: 54px 28px;
  }

  .company-facts div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .site-footer {
    align-items: flex-start;
    flex-direction: column;
  }

  .footer-meta {
    text-align: left;
  }
}

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

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