* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 32px; }
body { margin: 0; background: radial-gradient(ellipse at 78% 12%, #122c5b45, transparent 45%), var(--bg); color: var(--text); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 6px; }
::selection { color: #050a18; background: var(--accent); }
.page-shell { max-width: 1600px; margin: 0 auto; padding: 0 64px; overflow: clip; }
.site-header { height: 104px; display: flex; align-items: center; gap: 48px; border-bottom: 1px solid var(--line); position: relative; z-index: 3; }
.desktop-nav { display: flex; gap: 30px; margin-left: auto; font-size: 14px; color: #a4b2cc; }
.desktop-nav a, .text-link, .site-footer a { transition: color .18s ease; }
.desktop-nav a:hover, .text-link:hover, .site-footer a:hover { color: var(--accent); }
.header-actions { display: flex; align-items: center; gap: 32px; }
.language-switch { display: flex; align-items: center; gap: 2px; font-size: 12px; }
.language-switch span { color: #3b4c70; }
.language-switch button { background: transparent; border: 0; color: #8597b6; padding: 10px 7px; cursor: pointer; min-height: 40px; }
.language-switch button[aria-pressed="true"] { color: var(--text); }
.nav-cta { display: flex; align-items: center; justify-content: center; gap: 22px; padding: 12px 18px; border: 1px solid #3b507c; border-radius: 5px; font-size: 14px; transition: border-color .2s, background .2s; }
.nav-cta:hover { background: #102349; border-color: var(--accent); }
.hero { position: relative; min-height: 696px; display: flex; align-items: center; isolation: isolate; }
.hero-copy { position: relative; z-index: 2; padding: 65px 0 60px; width: 58%; pointer-events: none; }
.hero-copy a { pointer-events: auto; }
.eyebrow { color: #90a8d1; font-size: 11px; letter-spacing: 2px; line-height: 1.6; font-weight: 550; margin: 0 0 26px; }
.hero .eyebrow { display: flex; align-items: center; gap: 10px; }
.status-dot { background: var(--accent); width: 6px; height: 6px; display: inline-block; border-radius: 50%; box-shadow: 0 0 14px #609bff85; }
h1 { font-size: clamp(68px, 6.75vw, 106px); font-weight: 540; letter-spacing: -5px; line-height: 1.015; margin: 0; }
h1 .hero-highlight { color: var(--accent); }
.hero-tagline { font-size: 23px; letter-spacing: 1px; margin: 28px 0 12px; font-weight: 430; }
.hero-description { color: var(--muted); font-size: 15px; margin: 0; line-height: 1.8; }
.hero-actions { margin-top: 32px; display: flex; gap: 28px; align-items: center; }
.button { display: inline-flex; justify-content: center; align-items: center; gap: 38px; padding: 17px 23px; font-size: 15px; border-radius: 4px; font-weight: 650; transition: background .18s, transform .18s; }
.button-primary { background: var(--primary); color: #fff; box-shadow: 0 8px 35px #1f60d92b; }
.button-primary:hover { background: var(--primary-hover); transform: translateY(-2px); }
.button svg { fill: none; stroke: currentColor; stroke-width: 1.5; width: 20px; height: 20px; }
.text-link { display: inline-flex; align-items: center; gap: 16px; font-size: 14px; color: #bfcee6; }
.access-note { display: flex; gap: 7px; color: #8399bc; font-size: 12px; margin-top: 18px; }
.planet-scene { position: absolute; width: min(68vw, 880px); top: 50%; right: -124px; transform: translateY(-50%); z-index: -1; aspect-ratio: 1; }
.planet { width: 100%; height: 100%; display: block; }
.planet-caption { position: absolute; bottom: 16%; left: 47%; display: flex; gap: 16px; align-items: flex-start; padding-left: 22px; border-left: 1px solid #82aeef61; }
.crosshair { color: var(--accent); font-size: 21px; font-weight: 200; line-height: 1; }
.mono { font-family: "SFMono-Regular", Consolas, "Liberation Mono", monospace; font-size: 10px; letter-spacing: 1.6px; color: #93abd0; }
.planet-caption p { color: #acc3e7; margin: 7px 0 0; font-size: 12px; white-space: normal; max-width: 180px; line-height: 1.6; }
.planet-index { position: absolute; top: 18%; right: 24%; color: #718cb8; font-size: 9px; }
.scope-strip { display: flex; align-items: center; gap: 44px; min-height: 88px; border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); font-size: 13px; color: #9bafcf; }
.scope-strip p { display: flex; align-items: center; gap: 13px; margin: 12px 0; }
.scope-mark { color: var(--accent); font-size: 18px; }
.scope-strip .scroll-cue { display: flex; align-items: center; gap: 25px; margin-left: auto; font-size: 12px; }
.scroll-cue span:last-child { color: var(--accent); font-size: 20px; }
.section { padding: 96px 0; }
.section-heading { margin-bottom: 46px; }
.section-heading .eyebrow, .purpose .eyebrow { margin-bottom: 20px; }
h2 { font-size: clamp(32px, 3.2vw, 46px); font-weight: 530; letter-spacing: -1.8px; line-height: 1.35; margin: 0; }
.section-heading > p:last-child { color: var(--muted); font-size: 16px; line-height: 1.8; margin: 14px 0 0; }
.feature-grid { display: grid; grid-template-columns: repeat(3, minmax(0,1fr)); border: 1px solid var(--line); border-radius: 8px; overflow: hidden; }
.feature { padding: 30px 32px 28px; display: flex; flex-direction: column; position: relative; background: linear-gradient(145deg, #10234a66, #08132726); transition: background .2s; }
.feature + .feature { border-left: 1px solid var(--line); }
.feature:hover { background: #12274a; }
.feature:focus-visible { outline-offset: -4px; }
.feature-top { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 38px; }
.feature-top svg { width: 39px; height: 39px; fill: none; stroke: #8aaff0; stroke-width: 1.2; }
.feature-top .mono { color: #5e7ba9; padding-top: 6px; }
h3 { font-size: 20px; font-weight: 520; line-height: 1.5; margin: 0 0 13px; letter-spacing: -.3px; }
.feature p { color: var(--muted); line-height: 1.9; font-size: 14px; margin: 0 0 30px; max-width: 33em; }
.feature-link { display: flex; align-items: center; justify-content: space-between; color: #c7d8f5; font-size: 13px; margin-top: auto; gap: 16px; }
.feature-link > span:last-child { color: var(--accent); font-size: 19px; }
.purpose { display: grid; grid-template-columns: 1.15fr 1fr; gap: 100px; border-top: 1px solid var(--line); position: relative; }
.purpose::before { content: ''; position: absolute; pointer-events: none; width: 600px; height: 500px; left: -220px; top: -30px; background: radial-gradient(ellipse, #174db540, transparent 66%); z-index: -1; }
.purpose h2 { line-height: 1.55; }
.muted-heading { color: #819fcf; }
.purpose-description { font-size: 15px; color: #96a9c9; line-height: 2; margin: 24px 0 28px; max-width: 470px; }
.purpose-cta { color: var(--accent); }
.value { display: flex; gap: 24px; padding: 26px 0; border-bottom: 1px solid var(--line); }
.value:first-child { padding-top: 0; }
.value:last-child { border-bottom: 0; padding-bottom: 0; }
.value-number { padding-top: 8px; color: #709ada; }
.value h3 { font-size: 18px; margin: 0 0 8px; }
.value p { font-size: 14px; line-height: 1.85; color: var(--muted); margin: 0; }
.site-footer { border-top: 1px solid var(--line); min-height: 108px; display: flex; align-items: center; gap: 28px; font-size: 12px; color: #859abd; }
.footer-brand { font-size: 22px; font-weight: 630; letter-spacing: -.8px; color: #d6e3f9; }
.footer-dot { color: var(--accent); }
.site-footer > a:last-child { margin-left: auto; color: #bfceed; }
.skip-link { position: fixed; top: -80px; left: 20px; padding: 14px 20px; background: var(--accent); color: #08152d; z-index: 10; }
.skip-link:focus { top: 12px; }
@media (min-width: 1440px) { .hero { min-height: 760px; } }
@media (max-width: 1100px) {
  .page-shell { padding: 0 36px; }
  .site-header { gap: 26px; }
  .header-actions { gap: 20px; }
  .hero { min-height: 670px; }
  h1 { font-size: 76px; letter-spacing: -4px; }
  .hero-copy { width: 66%; }
  .planet-scene { right: -166px; width: 750px; opacity: .88; }
  .planet-caption { left: 44%; bottom: 18%; }
  .hero-tagline { font-size: 21px; }
  .scope-strip { gap: 26px; font-size: 12px; }
  .feature { padding: 26px; }
  .purpose { gap: 55px; }
}
@media (max-width: 760px) {
  .page-shell { padding: 0 24px; }
  .site-header { height: 82px; gap: 20px; justify-content: space-between; }
  .desktop-nav { display: none; }
  .header-actions { gap: 14px; }
  .nav-cta { gap: 12px; padding: 10px 12px; font-size: 12px; }
  .hero { display: block; min-height: 0; }
  .hero-copy { padding: 58px 0 0; width: 100%; }
  .hero .eyebrow { font-size: 10px; letter-spacing: 1.5px; margin-bottom: 26px; }
  h1 { font-size: clamp(60px, 10vw, 82px); letter-spacing: -3.5px; line-height: 1.04; }
  .hero-tagline { font-size: 20px; margin-top: 26px; letter-spacing: .3px; }
  .hero-actions { gap: 24px; margin-top: 26px; }
  .button { padding: 16px 20px; gap: 26px; font-size: 14px; }
  .text-link { font-size: 13px; gap: 10px; }
  .planet-scene { position: relative; width: min(120%, 640px); right: auto; top: auto; margin: -15px auto -20px; left: 50%; transform: translateX(-50%); opacity: 1; }
  .planet-caption { bottom: 12%; left: 40%; gap: 10px; padding-left: 15px; }
  .planet-caption p { font-size: 11px; }
  .planet-index { top: 15%; }
  .scope-strip { display: grid; grid-template-columns: 1fr 1fr; padding: 14px 0; gap: 0 12px; font-size: 11px; }
  .scope-strip p { gap: 8px; }
  .scope-strip .scroll-cue { font-size: 11px; gap: 15px; }
  .section { padding: 66px 0; }
  .section-heading { margin-bottom: 32px; }
  .eyebrow { font-size: 10px; letter-spacing: 1.4px; }
  h2 { font-size: 30px; letter-spacing: -1px; }
  .section-heading > p:last-child { font-size: 14px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature { padding: 26px; }
  .feature + .feature { border-left: 0; border-top: 1px solid var(--line); }
  .feature-top { margin-bottom: 22px; }
  .feature p { margin-bottom: 24px; }
  .purpose { grid-template-columns: 1fr; gap: 42px; }
  .purpose h2 { font-size: 34px; }
  .purpose-description { max-width: none; }
  .value { gap: 20px; padding: 24px 0; }
  .site-footer { min-height: 110px; flex-wrap: wrap; gap: 0 18px; padding: 25px 0; }
  .site-footer p { font-size: 11px; }
  .site-footer > a:last-child { width: 100%; margin-top: 12px; }
}
@media (max-width: 380px) {
  .page-shell { padding: 0 18px; }
  .site-header { gap: 10px; }
  .header-actions { gap: 7px; }
  .nav-cta { gap: 8px; padding: 9px; }
  h1 { font-size: 56px; }
  .hero-actions { gap: 17px; }
  .button { gap: 18px; }
  .hero-tagline { font-size: 18px; }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { transition: none !important; } }

html[lang="zh-CN"] h1 { font-size: clamp(58px, 5.7vw, 88px); letter-spacing: -2px; line-height: 1.15; }
@media (max-width: 760px) { html[lang="zh-CN"] h1 { font-size: clamp(45px, 9.5vw, 68px); letter-spacing: -1.5px; } }