/* ============================================================
   VELABOT — 远行光年  v3 (immersive + OS console + content)
   Brand: Navy #0A1029 | Velocity Blue #2563FF | AI Teal #00D182
   Fonts: Space Grotesk (headings) + Inter (body) + Noto Sans SC + JetBrains Mono (telemetry)
   ============================================================ */

/* ---------- CSS Custom Properties ---------- */
:root {
  --navy:        #0A1029;
  --navy-light:  #111827;
  --blue:        #2563FF;
  --blue-dark:   #1D4ED8;
  --blue-soft:   rgba(37,99,255,0.1);
  --blue-glow:   rgba(37,99,255,0.22);
  --teal:        #00D182;
  --teal-deep:   #059669;
  --teal-soft:   rgba(0,209,130,0.1);
  --silver:      #ECEFF4;
  --graphite:    #111827;
  --white:       #FFFFFF;

  --bg-dark:     #0A1029;
  --bg-darker:   #070C1E;
  --bg-light:    #F8FAFC;
  --bg-white:    #FFFFFF;

  --text-primary:   #0F172A;
  --text-secondary: #475569;
  --text-tertiary:  #64748B;
  --text-inverse:   #F1F5F9;
  --text-muted:     rgba(241,245,249,0.6);

  --border:       rgba(15,23,42,0.06);
  --border-strong: rgba(15,23,42,0.14);

  /* Fluid type scale */
  --fs-xs:   clamp(0.75rem, 0.7rem + 0.25vw, 0.8125rem);
  --fs-sm:   clamp(0.8125rem, 0.78rem + 0.2vw, 0.875rem);
  --fs-base: clamp(0.9375rem, 0.9rem + 0.2vw, 1rem);
  --fs-lg:   clamp(1.05rem, 1rem + 0.3vw, 1.2rem);
  --fs-xl:   clamp(1.25rem, 1.15rem + 0.5vw, 1.45rem);
  --fs-2xl:  clamp(1.5rem, 1.35rem + 0.8vw, 1.85rem);
  --fs-3xl:  clamp(2rem, 1.75rem + 1.3vw, 2.65rem);
  --fs-4xl:  clamp(2.5rem, 2.1rem + 2vw, 3.65rem);
  --fs-hero: clamp(3rem, 2.4rem + 3.6vw, 5.4rem);

  --space-xs:  0.25rem;
  --space-sm:  0.5rem;
  --space-md:  1rem;
  --space-lg:  1.5rem;
  --space-xl:  2rem;
  --space-2xl: 3.5rem;
  --space-3xl: 5.5rem;
  --space-4xl: 7.5rem;

  --radius-sm:  8px;
  --radius-md:  12px;
  --radius-lg:  18px;
  --radius-xl:  24px;
  --radius-full: 9999px;

  --shadow-sm:   0 1px 3px rgba(10,16,41,0.04), 0 1px 2px rgba(10,16,41,0.03);
  --shadow-md:   0 4px 16px rgba(10,16,41,0.07);
  --shadow-lg:   0 8px 32px rgba(10,16,41,0.1);
  --shadow-xl:   0 16px 48px rgba(10,16,41,0.12);
  --shadow-blue: 0 6px 28px rgba(37,99,255,0.28);
  --shadow-image: 0 20px 60px rgba(10,16,41,0.2);

  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --ease-in-out: cubic-bezier(0.65, 0, 0.35, 1);
  --duration-fast: 150ms;
  --duration-normal: 280ms;
  --duration-slow: 450ms;

  --max-width: 1180px;
  --nav-height: 70px;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: var(--fs-base);
  line-height: 1.68;
  color: var(--text-primary);
  background: var(--bg-white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; color: inherit; }
ul, ol { list-style: none; }

:focus-visible {
  outline: 2.5px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: var(--space-md);
  z-index: 10000;
  padding: var(--space-sm) var(--space-md);
  background: var(--blue);
  color: var(--white);
  border-radius: var(--radius-sm);
  font-weight: 600;
  font-size: var(--fs-sm);
  transition: top var(--duration-fast) var(--ease-out);
}
.skip-link:focus { top: var(--space-md); }

/* ---------- Bilingual ---------- */
[data-lang="zh"] .t-en { display: none; }
[data-lang="en"] .t-zh { display: none; }
.t-en-block { display: block; }
[data-lang="zh"] .t-en-block { display: none; }
[data-lang="en"] .t-en-block { display: block; }
.hide-mobile { display: inline; }
@media (max-width: 640px) { .hide-mobile { display: none; } }

/* ---------- REVEAL ANIMATION (JS-gated) ---------- */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition:
    opacity 0.65s var(--ease-out),
    transform 0.65s var(--ease-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.reveal[data-delay="1"] { transition-delay: 0.1s; }
.reveal[data-delay="2"] { transition-delay: 0.2s; }
.reveal[data-delay="3"] { transition-delay: 0.32s; }
.reveal[data-delay="4"] { transition-delay: 0.44s; }

html:not(.js) .reveal {
  opacity: 1 !important;
  transform: none !important;
  transition: none !important;
}

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  html { scroll-behavior: auto; }
}


/* ============ NAVIGATION ============ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(20px) saturate(1.5);
  -webkit-backdrop-filter: blur(20px) saturate(1.5);
  border-bottom: 1px solid var(--border);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}
.nav.is-scrolled {
  background: rgba(255,255,255,0.95);
  box-shadow: 0 1px 14px rgba(10,16,41,0.06);
}

.nav__inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
  text-decoration: none;
  transition: opacity 0.2s ease;
}
.brand:hover { opacity: 0.82; }
.brand__mark { height: 36px; width: auto; }
.brand__cn {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--text-tertiary);
  letter-spacing: 0.02em;
  padding-left: var(--space-sm);
  border-left: 1px solid var(--border);
}

.nav__links {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}
.nav__links a {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-secondary);
  padding: var(--space-xs) 0;
  position: relative;
  transition: color 0.2s ease;
}
.nav__links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--blue);
  border-radius: 1px;
  transition: width 0.28s var(--ease-out);
}
.nav__links a:hover,
.nav__links a.is-active { color: var(--blue); }
.nav__links a:hover::after,
.nav__links a.is-active::after { width: 100%; }

.nav__cta {
  background: var(--blue) !important;
  color: var(--white) !important;
  padding: 8px 18px !important;
  border-radius: var(--radius-full);
  font-weight: 600 !important;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease !important;
}
.nav__cta::after { display: none !important; }
.nav__cta:hover {
  background: var(--blue-dark) !important;
  transform: translateY(-1px);
  box-shadow: var(--shadow-blue) !important;
}

.nav__tools { display: flex; align-items: center; gap: var(--space-md); }

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 2px;
  font-family: 'Space Grotesk', monospace;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--text-tertiary);
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease, background 0.2s ease;
}
.lang-toggle:hover { background: var(--silver); }
.lang-toggle__opt { transition: color 0.2s ease; }
.lang-toggle__opt.is-active { color: var(--blue); }
.lang-toggle__sep { color: var(--border-strong); user-select: none; }

.nav__burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  width: 32px; height: 32px;
  justify-content: center;
}
.nav__burger span {
  display: block;
  width: 22px; height: 2px;
  background: var(--graphite);
  border-radius: 2px;
  transition: transform 0.3s var(--ease-out), opacity 0.3s var(--ease-out);
}
.nav__burger.is-open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav__burger.is-open span:nth-child(2) { opacity: 0; }
.nav__burger.is-open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

@media (max-width: 1100px) {
  .nav__burger { display: flex; }
  .nav__links {
    position: fixed;
    top: var(--nav-height); left: 0; right: 0; bottom: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(24px);
    padding: var(--space-xl);
    transform: translateX(100%);
    visibility: hidden;
    pointer-events: none;
    transition: transform 0.35s var(--ease-out), visibility 0s linear 0.35s;
    z-index: 999;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav__links.is-open {
    transform: translateX(0);
    visibility: visible;
    pointer-events: auto;
    transition: transform 0.35s var(--ease-out), visibility 0s;
  }
  .nav__links a {
    display: block !important;
    padding: var(--space-md) 0;
    font-size: var(--fs-lg);
    border-bottom: 1px solid var(--border);
  }
  .nav__cta {
    margin-top: var(--space-md);
    text-align: center;
    padding: 14px !important;
    border-radius: var(--radius-md) !important;
  }
  .brand__cn { display: none; }
}


/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  padding: 12px 26px;
  border-radius: var(--radius-full);
  transition: all 0.22s var(--ease-out);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
  letter-spacing: -0.01em;
}
.btn:active { transform: scale(0.97); }

.btn--primary {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
}
.btn--primary:hover {
  background: var(--blue-dark);
  border-color: var(--blue-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-blue);
}

.btn--outline {
  background: transparent;
  color: var(--blue);
  border-color: var(--blue);
}
.btn--outline:hover {
  background: var(--blue);
  color: var(--white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-blue);
}

.btn--lg {
  padding: 16px 34px;
  font-size: var(--fs-base);
  border-radius: var(--radius-lg);
}


/* ============ SECTIONS ============ */
.section { padding: var(--space-4xl) 0; position: relative; }
.section__inner { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-xl); }
.section__head { max-width: 700px; margin-bottom: var(--space-3xl); }

.kicker {
  display: inline-block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.11em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: var(--space-md);
  padding: 6px 14px;
  background: var(--teal-soft);
  border-radius: var(--radius-full);
}
.kicker--blue { color: var(--blue); background: var(--blue-soft); }

.section__title {
  font-size: var(--fs-3xl);
  line-height: 1.18;
  color: var(--navy);
  letter-spacing: -0.03em;
}
.section__title--lg { font-size: var(--fs-4xl); }
.section__title--light { color: var(--white); }
.section__sub {
  margin-top: var(--space-lg);
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  max-width: 540px;
  line-height: 1.65;
}
.section__sub--light { color: var(--text-muted); }

@media (max-width: 768px) {
  .section { padding: var(--space-3xl) 0; }
  .section__inner { padding: 0 var(--space-lg); }
  .section__title { font-size: var(--fs-2xl); }
  .section__title--lg { font-size: var(--fs-2xl); }
}


/* ============ HERO (immersive) ============ */
.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  background: linear-gradient(165deg, var(--navy) 0%, #0F1733 45%, #131c3a 100%);
  color: var(--text-inverse);
  position: relative;
  overflow: hidden;
  padding-top: calc(var(--nav-height) + var(--space-2xl));
}

.hero__bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
}
.hero__glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.5;
  will-change: transform;
}
.hero__glow--1 {
  width: 680px; height: 680px;
  background: radial-gradient(circle, rgba(37,99,255,0.26) 0%, transparent 70%);
  top: -14%; right: -6%;
}
.hero__glow--2 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(0,209,130,0.12) 0%, transparent 70%);
  bottom: 4%; left: -6%;
}
.hero__glow--3 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(99,102,241,0.14) 0%, transparent 70%);
  bottom: -18%; right: 22%;
}
.hero__grid-lines {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 72%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 72%);
}
.hero__scan {
  position: absolute;
  left: 0; right: 0; top: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(0,209,130,0.55), transparent);
  opacity: 0;
  animation: hero-scan 8s linear infinite;
}
@keyframes hero-scan {
  0%   { transform: translateY(0vh); opacity: 0; }
  8%   { opacity: 1; }
  92%  { opacity: 1; }
  100% { transform: translateY(104vh); opacity: 0; }
}

.hero__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
  position: relative;
  z-index: 1;
}
.hero__copy, .hero__visual { min-width: 0; }

.eyebrow {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--teal);
  margin-bottom: var(--space-lg);
}
.eyebrow__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  flex-shrink: 0;
  animation: pulse-dot 2.2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.85); }
}

.hero__title {
  font-size: var(--fs-hero);
  line-height: 1.04;
  letter-spacing: -0.045em;
  margin-bottom: var(--space-lg);
}
.hero__title-line { display: block; }
.hero__title-accent {
  background: linear-gradient(120deg, var(--blue) 0%, #60a5fa 45%, var(--teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__tagline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xl);
  font-weight: 500;
  color: var(--teal);
  margin-bottom: var(--space-md);
  letter-spacing: -0.01em;
}

.hero__lede {
  font-size: var(--fs-base);
  color: var(--text-muted);
  max-width: 460px;
  margin-bottom: var(--space-xl);
  line-height: 1.76;
}

.hero__actions { display: flex; gap: var(--space-md); flex-wrap: wrap; }

/* Hero visual — robot + floating HUD cards */
.hero__visual { display: flex; align-items: center; justify-content: center; }
.hero__img-wrap {
  position: relative;
  width: 100%;
  max-width: 500px;
  border-radius: var(--radius-xl);
  box-shadow: 0 30px 80px rgba(0,0,0,0.45), 0 0 0 1px rgba(255,255,255,0.06);
  will-change: transform;
}
.hero__img {
  width: 100%;
  height: auto;
  object-fit: cover;
  display: block;
  border-radius: var(--radius-xl);
}
.hero__img-shade {
  position: absolute;
  inset: 0;
  border-radius: var(--radius-xl);
  background: linear-gradient(180deg, rgba(7,12,30,0) 45%, rgba(7,12,30,0.5) 100%);
  pointer-events: none;
}

/* Floating HUD cards */
.hud {
  position: absolute;
  z-index: 4;
  display: flex;
  flex-direction: column;
  gap: 4px;
  background: rgba(8,12,30,0.82);
  border: 1px solid rgba(255,255,255,0.14);
  border-radius: 12px;
  padding: 10px 14px;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  box-shadow: 0 14px 40px rgba(0,0,0,0.4);
  font-family: 'JetBrains Mono', monospace;
  color: var(--silver);
  animation: hud-float 6s ease-in-out infinite;
}
.hud--status {
  top: -16px; left: -14px;
  flex-direction: row;
  align-items: center;
  gap: 8px;
  font-size: 0.7rem;
}
.hud--queue { bottom: -20px; right: -8px; width: 168px; animation-delay: 0.8s; }
.hud--loop { top: 30%; right: -24px; width: 158px; animation-delay: 1.6s; }
.hud__dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 10px var(--teal);
  animation: pulse-dot 2.2s ease-in-out infinite;
  flex-shrink: 0;
}
.hud__label {
  font-size: 0.56rem;
  letter-spacing: 0.18em;
  color: var(--teal);
  font-weight: 600;
}
.hud__val { font-size: 0.8rem; font-weight: 600; color: #fff; }
.hud__val b { font-weight: 400; color: rgba(236,239,244,0.6); }
.hud__bar {
  height: 3px;
  border-radius: 2px;
  background: rgba(255,255,255,0.12);
  overflow: hidden;
  margin-top: 2px;
}
.hud__bar i {
  display: block;
  height: 100%;
  width: var(--w);
  background: linear-gradient(90deg, var(--blue), var(--teal));
}
@keyframes hud-float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-7px); }
}

/* Scroll indicator */
.hero__scroll {
  position: absolute;
  bottom: var(--space-2xl);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-sm);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}
.hero__scroll-line {
  width: 1px; height: 38px;
  background: linear-gradient(to bottom, var(--blue), transparent);
  animation: scroll-line 2s ease-in-out infinite;
}
@keyframes scroll-line {
  0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
  50% { opacity: 1; }
  100% { transform: scaleY(1); transform-origin: top; opacity: 0; }
}

/* Hero responsive */
@media (max-width: 960px) {
  .hero__inner {
    grid-template-columns: 1fr;
    gap: var(--space-2xl);
    text-align: center;
  }
  .hero__copy { order: 1; }
  .hero__visual { order: 0; }
  .hero__img-wrap { max-width: 400px; margin: 0 auto; }
  .hero__lede { margin-left: auto; margin-right: auto; }
  .hero__actions { justify-content: center; }
  .eyebrow { justify-content: center; }
  .hud--status { top: -14px; left: -6px; }
  .hud--loop { right: -8px; }
  .hud--queue { right: 0; }
}
@media (max-width: 640px) {
  .hero { padding-top: calc(var(--nav-height) + var(--space-xl)); }
  .hero__title { font-size: var(--fs-3xl); }
  .hero__tagline { font-size: var(--fs-lg); }
  .hero__img-wrap { max-width: 300px; border-radius: var(--radius-lg); }
  .hero__scroll { display: none; }
  .hud--status { display: none; }
}


/* ============ BRAND PROMISE ============ */
.promise { background: var(--bg-light); }
.promise__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}
.promise__lead {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  position: relative;
  padding-left: var(--space-lg);
  border-left: 3px solid var(--blue);
}
.promise__points { display: flex; flex-direction: column; gap: var(--space-xl); }
.promise__points li {
  display: flex;
  gap: var(--space-lg);
  align-items: flex-start;
}
.promise__num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-2xl);
  font-weight: 700;
  color: var(--blue);
  opacity: 0.28;
  line-height: 1;
  flex-shrink: 0;
  min-width: 2ch;
}
.promise__points strong {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 2px;
}
.promise__points div > span:last-child {
  display: block;
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
  margin-top: 2px;
}

@media (max-width: 768px) {
  .promise__grid { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .promise__lead { border-left-width: 2px; padding-left: var(--space-md); }
}


/* ============ POSITIONING ============ */
.positioning { background: var(--bg-white); }
.positioning__layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: var(--space-3xl);
  align-items: start;
}
.positioning__desc {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: var(--space-lg);
}

.positioning__img {
  position: relative;
  margin-top: var(--space-xl);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.pos-img {
  width: 100%;
  aspect-ratio: 16 / 10;
  object-fit: cover;
  object-position: left center;
  display: block;
  border-radius: var(--radius-lg);
  transition: transform 0.4s var(--ease-out);
}
.positioning__img:hover .pos-img {
  transform: scale(1.02);
}
.pos-img__cap {
  position: absolute;
  left: var(--space-md); bottom: var(--space-md);
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 14px;
  border-radius: var(--radius-full);
  background: rgba(7,12,30,0.7);
  border: 1px solid rgba(255,255,255,0.14);
  backdrop-filter: blur(8px);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  color: var(--silver);
}
.pos-img__cap-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px var(--teal);
  flex-shrink: 0;
}

.positioning__cards {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.pos-card {
  background: var(--bg-card, #ffffff);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform 0.28s var(--ease-out), box-shadow 0.28s var(--ease-out), border-color 0.28s var(--ease-out);
}
.pos-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.pos-card__icon-wrap {
  width: 44px; height: 44px;
  margin-bottom: var(--space-md);
}
.pos-card__icon-svg { width: 100%; height: 100%; }
.pos-card h3 {
  font-size: var(--fs-lg);
  font-weight: 600;
  margin-bottom: var(--space-sm);
  color: var(--navy);
}
.pos-card p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.65;
}
.highlight-blue { color: var(--blue); }

@media (max-width: 900px) {
  .positioning__layout { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .positioning__cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-md);
  }
}


/* ============ VISION ============ */
.vision {
  background: var(--navy);
  color: var(--text-inverse);
  text-align: center;
}
.vision .kicker {
  background: rgba(37,99,255,0.14);
  color: var(--blue);
}
.vision__quote {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-2xl);
  font-weight: 600;
  line-height: 1.38;
  color: var(--white);
  max-width: 780px;
  margin: var(--space-xl) auto 0;
  position: relative;
  padding: 0 var(--space-xl);
}
.vision__quote::before {
  content: '"';
  position: absolute;
  top: -22px; left: 0;
  font-size: 4rem;
  color: var(--blue);
  opacity: 0.28;
  font-family: Georgia, serif;
  line-height: 1;
}
.vision__short {
  margin-top: var(--space-2xl);
  padding: var(--space-xl) var(--space-2xl);
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-xl);
  max-width: 580px;
  margin-left: auto;
  margin-right: auto;
}
.vision__short-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--teal);
  display: block;
  margin-bottom: var(--space-sm);
}
.vision__short-text {
  font-size: var(--fs-lg);
  color: var(--silver);
  line-height: 1.6;
}

@media (max-width: 640px) {
  .vision__quote { font-size: var(--fs-xl); padding: 0; }
  .vision__quote::before { display: none; }
  .vision__short { padding: var(--space-lg); }
}


/* ============ CAPABILITIES PIPELINE ============ */
.capabilities { background: var(--bg-light); }
.pipeline {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.pipeline__track {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  padding: var(--space-lg) var(--space-xl);
  overflow-x: auto;
  border-bottom: 1px solid var(--border);
  scrollbar-width: none;
  -ms-overflow-style: none;
}
.pipeline__track::-webkit-scrollbar { display: none; }

.pstep {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 10px 18px;
  border-radius: var(--radius-md);
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text-tertiary);
  white-space: nowrap;
  transition: all 0.2s var(--ease-out);
  border: 2px solid transparent;
  flex-shrink: 0;
}
.pstep:hover { background: var(--blue-soft); color: var(--blue); }
.pstep.is-active {
  background: var(--blue);
  color: var(--white);
  box-shadow: var(--shadow-blue);
}
.pstep__no {
  font-size: var(--fs-xs);
  opacity: 0.6;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.pstep.is-active .pstep__no { opacity: 0.8; color: rgba(255,255,255,0.8); }

.pstep__arrow { color: var(--border-strong); flex-shrink: 0; display: flex; align-items: center; }

.pipeline__detail { padding: var(--space-2xl) var(--space-xl); min-height: 210px; }
.pdetail { display: none; animation: fadeSlideIn 0.35s var(--ease-out); }
.pdetail--active, .pdetail.is-active { display: block; }
@keyframes fadeSlideIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.pdetail__head { display: flex; align-items: center; gap: var(--space-md); margin-bottom: var(--space-md); }
.pdetail__step-num {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 700;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 4px 13px;
  border-radius: var(--radius-full);
  letter-spacing: 0.05em;
}
.pdetail h3 { font-size: var(--fs-xl); font-weight: 700; color: var(--navy); }
.pdetail p {
  font-size: var(--fs-base);
  color: var(--text-secondary);
  line-height: 1.74;
  max-width: 660px;
  margin-bottom: var(--space-lg);
}
.pdetail__tags { display: flex; flex-wrap: wrap; gap: var(--space-sm); }
.tag {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 500;
  color: var(--blue);
  background: var(--blue-soft);
  padding: 5px 14px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(37,99,255,0.1);
}

@media (max-width: 640px) {
  .pipeline__track { padding: var(--space-md); gap: 4px; }
  .pstep { padding: 8px 12px; font-size: var(--fs-xs); }
  .pstep__name .t-en { display: none; }
  .pstep__arrow { display: none; }
  .pipeline__detail { padding: var(--space-lg); }
  .tag { font-size: 0.7rem; padding: 4px 10px; }
}


/* ============ LIVE OS CONSOLE + METRICS (dark) ============ */
.console {
  background: linear-gradient(180deg, #070C1E 0%, #0A1029 55%, #0B1128 100%);
  color: var(--text-inverse);
  position: relative;
  overflow: hidden;
}
.console__bg { position: absolute; inset: 0; pointer-events: none; }
.console__glow { position: absolute; border-radius: 50%; filter: blur(100px); opacity: 0.4; }
.console__glow--1 {
  width: 620px; height: 620px;
  background: radial-gradient(circle, rgba(37,99,255,0.22) 0%, transparent 70%);
  top: -20%; left: 10%;
}
.console__glow--2 {
  width: 520px; height: 520px;
  background: radial-gradient(circle, rgba(0,209,130,0.12) 0%, transparent 70%);
  bottom: -18%; right: 5%;
}

.console__board {
  position: relative;
  background: rgba(11,17,40,0.85);
  border: 1px solid rgba(255,255,255,0.1);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: 0 30px 80px rgba(0,0,0,0.45);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}
.console__topbar {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 12px 18px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.console__dots { display: flex; gap: 6px; }
.console__dots i { width: 10px; height: 10px; border-radius: 50%; background: #ff5f57; }
.console__dots i:nth-child(2) { background: #febc2e; }
.console__dots i:nth-child(3) { background: #28c840; }
.console__path {
  flex: 1;
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--fs-xs);
  color: rgba(236,239,244,0.64);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.console__live {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: var(--teal);
  display: flex;
  align-items: center;
  gap: 6px;
}
.console__live-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--teal);
  box-shadow: 0 0 8px var(--teal);
  animation: pulse-dot 1.6s ease-in-out infinite;
}

.console__body {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-2xl);
  padding: var(--space-2xl);
  align-items: center;
}

/* Animated five-step flow */
.console__flow { display: flex; flex-direction: column; gap: var(--space-xl); }
.flow__track {
  position: relative;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}
.flow__line {
  position: absolute;
  top: 22px; left: 9%; right: 9%;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(37,99,255,0.35), rgba(37,99,255,0.9), rgba(0,209,130,0.9));
}
.flow__pulse {
  position: absolute;
  top: 22px; left: 10%;
  width: 8px; height: 8px;
  margin-left: -4px;
  border-radius: 50%;
  background: var(--teal);
  transform: translateY(-50%);
  animation: flow-pulse 5.5s linear infinite;
  box-shadow: 0 0 14px rgba(0,209,130,0.9);
}
@keyframes flow-pulse {
  0%   { left: 10%; opacity: 0; }
  8%   { opacity: 1; }
  88%  { opacity: 1; }
  100% { left: 90%; opacity: 0; }
}
.flow__node {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  position: relative;
  z-index: 2;
  width: 64px;
}
.flow__no {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: var(--fs-sm);
  background: #0E1530;
  border: 1px solid rgba(255,255,255,0.14);
  color: rgba(236,239,244,0.6);
  transition: all 0.3s var(--ease-out);
}
.flow__node.is-done .flow__no {
  border-color: var(--teal);
  color: var(--teal);
  background: rgba(0,209,130,0.08);
  box-shadow: 0 0 0 4px rgba(0,209,130,0.06);
}
.flow__node.is-active .flow__no {
  border-color: var(--blue);
  color: #fff;
  background: var(--blue);
  animation: node-glow 2.4s ease-in-out infinite;
}
@keyframes node-glow {
  0%, 100% { box-shadow: 0 0 0 5px rgba(37,99,255,0.15), 0 0 18px rgba(37,99,255,0.35); }
  50%      { box-shadow: 0 0 0 9px rgba(37,99,255,0.1), 0 0 30px rgba(37,99,255,0.55); }
}
.flow__name {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  color: rgba(236,239,244,0.7);
}
.flow__node.is-active .flow__name { color: #fff; }
.flow__meta {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--fs-xs);
  color: rgba(236,239,244,0.64);
}

/* Telemetry rows */
.console__telemetry {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  border-left: 1px solid rgba(255,255,255,0.08);
  padding-left: var(--space-2xl);
}
.tele {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 4px 12px;
  align-items: baseline;
}
.tele__label {
  grid-column: 1 / -1;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  color: rgba(236,239,244,0.6);
}
.tele__value {
  font-family: 'JetBrains Mono', monospace;
  font-size: var(--fs-2xl);
  font-weight: 600;
  color: #fff;
}
.tele__unit { font-size: 0.6em; color: rgba(236,239,244,0.5); }
.tele__bar {
  grid-column: 1 / -1;
  height: 3px;
  border-radius: 2px;
  background: rgba(255,255,255,0.1);
  overflow: hidden;
}
.tele__bar i {
  display: block;
  height: 100%;
  width: var(--w);
  background: linear-gradient(90deg, var(--blue), var(--teal));
}

/* Metrics */
.metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-md);
  margin-top: var(--space-3xl);
}
.metric {
  background: rgba(255,255,255,0.035);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-lg);
  text-align: center;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.metric:hover {
  border-color: rgba(37,99,255,0.5);
  background: rgba(37,99,255,0.06);
  transform: translateY(-3px);
}
.metric__value {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: var(--fs-4xl);
  letter-spacing: -0.02em;
  line-height: 1;
  background: linear-gradient(120deg, #ffffff 20%, #9dc0ff 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.metric__prefix, .metric__suffix { font-size: 0.55em; }
.metric__prefix { margin-right: 2px; }
.metric__label {
  display: block;
  margin-top: var(--space-sm);
  font-size: var(--fs-sm);
  color: var(--text-muted);
}

@media (max-width: 900px) {
  .console__body { grid-template-columns: 1fr; gap: var(--space-2xl); }
  .console__telemetry { border-left: none; padding-left: 0; border-top: 1px solid rgba(255,255,255,0.08); padding-top: var(--space-2xl); }
  .metrics { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
  .metrics { grid-template-columns: 1fr 1fr; }
  .flow__node { width: 52px; }
  .flow__no { width: 38px; height: 38px; font-size: var(--fs-xs); }
}

/* 控制台离屏时暂停循环动画（JS 切换 is-offscreen） */
.console.is-offscreen .flow__pulse,
.console.is-offscreen .flow__node.is-active .flow__no,
.console.is-offscreen .console__live-dot {
  animation-play-state: paused;
}


/* ============ INDUSTRY SCENARIOS ============ */
.scenarios { background: var(--bg-white); }
.scenario__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}
.scenario-card {
  position: relative;
  overflow: hidden;
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform 0.28s var(--ease-out), box-shadow 0.28s var(--ease-out), border-color 0.28s var(--ease-out);
}
.scenario-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue), var(--teal));
  opacity: 0;
  transition: opacity 0.3s var(--ease-out);
}
.scenario-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--blue);
}
.scenario-card:hover::before { opacity: 1; }
.scenario-card__index {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: var(--fs-2xl);
  color: var(--blue);
  opacity: 0.2;
  line-height: 1;
}
.scenario-card h3 {
  font-size: var(--fs-lg);
  font-weight: 700;
  color: var(--navy);
  margin: var(--space-md) 0 var(--space-sm);
}
.scenario-card p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}
.scenario-card__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-sm);
  margin-top: var(--space-md);
}
.scenario-card .tag { color: var(--teal-deep); background: var(--teal-soft); border-color: rgba(5,150,105,0.14); }

@media (max-width: 1000px) { .scenario__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .scenario__grid { grid-template-columns: 1fr; } }


/* ============ OS ARCHITECTURE (dark) ============ */
.arch {
  background: linear-gradient(180deg, #0B1128 0%, #070C1E 100%);
  color: var(--text-inverse);
  position: relative;
  overflow: hidden;
}
.arch__bg { position: absolute; inset: 0; pointer-events: none; }
.arch__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse at 50% 0%, black 20%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at 50% 0%, black 20%, transparent 70%);
}

.arch__stack {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  max-width: 800px;
  margin: 0 auto;
}
.arch__spine {
  position: absolute;
  left: 52px;
  top: 18px; bottom: 18px;
  width: 2px;
  background: linear-gradient(180deg, var(--blue), var(--teal));
  opacity: 0.35;
  border-radius: 2px;
}
.arch__layer {
  position: relative;
  z-index: 1;
  background: rgba(255,255,255,0.03);
  border: 1px solid rgba(255,255,255,0.09);
  border-radius: var(--radius-lg);
  padding: var(--space-xl) var(--space-2xl);
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out), transform 0.3s var(--ease-out);
}
.arch__layer:hover {
  border-color: rgba(37,99,255,0.55);
  background: rgba(37,99,255,0.06);
  transform: translateX(8px);
}
.arch__layer-head {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
  margin-bottom: var(--space-sm);
}
.arch__layer-no {
  font-family: 'Space Grotesk', sans-serif;
  font-weight: 700;
  font-size: var(--fs-xl);
  color: var(--teal);
  width: 44px;
  flex-shrink: 0;
}
.arch__layer h3 {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xl);
  font-weight: 700;
  color: #fff;
}
.arch__layer-desc {
  font-size: var(--fs-sm);
  color: rgba(236,239,244,0.65);
  line-height: 1.7;
  max-width: 540px;
  margin-left: calc(44px + var(--space-lg));
}
.arch__layer-tags {
  display: flex;
  gap: var(--space-sm);
  margin-top: var(--space-md);
  margin-left: calc(44px + var(--space-lg));
}
.arch__tag {
  font-family: 'JetBrains Mono', monospace;
  font-size: 0.66rem;
  font-weight: 500;
  padding: 4px 12px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0,209,130,0.28);
  color: var(--teal);
  background: rgba(0,209,130,0.05);
}

@media (max-width: 640px) {
  .arch__spine { display: none; }
  .arch__layer { padding: var(--space-lg); }
  .arch__layer-desc, .arch__layer-tags { margin-left: 0; }
  .arch__layer-head { flex-wrap: wrap; }
}


/* ============ ABOUT / COMPANY ============ */
.about { background: var(--bg-light); }
.about__layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: var(--space-3xl);
  align-items: start;
}
.about__story {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  line-height: 1.8;
}
.about__story-accent {
  color: var(--navy);
  font-weight: 500;
  border-left: 3px solid var(--blue);
  padding-left: var(--space-lg);
}
.about__values { display: flex; flex-direction: column; gap: var(--space-xl); }
.about__values li { display: flex; gap: var(--space-lg); align-items: flex-start; }
.about__value-no {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xl);
  font-weight: 700;
  color: var(--teal-deep);
  opacity: 0.5;
  line-height: 1;
  flex-shrink: 0;
}
.about__values strong {
  display: block;
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 2px;
}
.about__values div > span:last-child {
  display: block;
  font-size: var(--fs-sm);
  color: var(--text-tertiary);
}

@media (max-width: 768px) {
  .about__layout { grid-template-columns: 1fr; gap: var(--space-2xl); }
}


/* ============ NEWS ============ */
.news { background: var(--bg-white); }
.news__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-lg);
}
.news-card {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: transform 0.28s var(--ease-out), box-shadow 0.28s var(--ease-out), border-color 0.28s var(--ease-out);
}
.news-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: var(--teal-deep);
}
.news-card__date {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--blue);
}
.news-card h3 {
  font-size: var(--fs-base);
  font-weight: 700;
  line-height: 1.5;
  color: var(--navy);
  margin: var(--space-sm) 0;
}
.news-card p {
  font-size: var(--fs-sm);
  color: var(--text-secondary);
  line-height: 1.7;
}

@media (max-width: 900px) { .news__grid { grid-template-columns: 1fr; } }


/* ============ MANIFESTO STRIP ============ */
.manifesto {
  background: linear-gradient(135deg, var(--blue) 0%, #1D4ED8 40%, var(--navy) 100%);
  color: var(--white);
  padding: var(--space-4xl) 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.manifesto::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 18% 50%, rgba(0,209,130,0.12) 0%, transparent 50%),
    radial-gradient(circle at 82% 50%, rgba(37,99,255,0.18) 0%, transparent 50%);
  pointer-events: none;
}
.manifesto__inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-xl);
  position: relative;
  z-index: 1;
}
.manifesto__en {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-4xl);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: var(--space-sm);
}
.manifesto__cn {
  font-family: 'Noto Sans SC', sans-serif;
  font-size: var(--fs-xl);
  font-weight: 400;
  color: var(--teal);
  margin-bottom: var(--space-xl);
}
.manifesto__rule {
  display: block;
  width: 56px; height: 3px;
  background: var(--teal);
  border-radius: 2px;
  margin: 0 auto var(--space-xl);
}
.manifesto__sub {
  font-size: var(--fs-base);
  color: rgba(255,255,255,0.7);
  max-width: 500px;
  margin: 0 auto;
  line-height: 1.7;
}

@media (max-width: 640px) {
  .manifesto { padding: var(--space-3xl) 0; }
  .manifesto__en { font-size: var(--fs-2xl); }
  .manifesto__cn { font-size: var(--fs-lg); }
}


/* ============ CONTACT / CTA ============ */
.contact { background: var(--bg-white); }
.contact__layout {
  max-width: 1020px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: start;
}
.contact__title {
  font-size: var(--fs-3xl);
  color: var(--navy);
  margin-bottom: var(--space-lg);
  line-height: 1.25;
}
.contact__desc {
  font-size: var(--fs-lg);
  color: var(--text-secondary);
  margin-bottom: var(--space-2xl);
  line-height: 1.7;
}
.contact__channels {
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}
.contact__channels li {
  display: flex;
  align-items: baseline;
  gap: var(--space-lg);
}
.contact__ch-label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-tertiary);
  width: 88px;
  flex-shrink: 0;
}
.contact__channels a {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-base);
  font-weight: 600;
  color: var(--blue);
  transition: color 0.2s ease;
}
.contact__channels a:hover { color: var(--blue-dark); }
.contact__ch-value { font-size: var(--fs-base); color: var(--text-primary); }

/* Form */
.contact__form {
  background: var(--bg-light);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
}
.form__row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}
.form__field {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: var(--space-md);
}
.form__field label {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--text-secondary);
}
.form__field input,
.form__field textarea {
  background: #fff;
  border: 1px solid var(--border-strong);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  font: inherit;
  font-size: var(--fs-base);
  color: var(--text-primary);
  resize: vertical;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form__field input::placeholder,
.form__field textarea::placeholder { color: var(--text-tertiary); }
.form__field input:focus,
.form__field textarea:focus {
  outline: none;
  border-color: var(--blue);
  box-shadow: 0 0 0 3px var(--blue-soft);
}
.form__submit { width: 100%; justify-content: center; }
.form__note {
  margin-top: var(--space-md);
  font-size: var(--fs-sm);
  min-height: 1.4em;
  text-align: center;
}
.form__note.is-ok { color: var(--teal-deep); }
.form__note.is-err { color: #dc2626; }

@media (max-width: 900px) {
  .contact__layout { grid-template-columns: 1fr; gap: var(--space-2xl); }
}
@media (max-width: 560px) {
  .form__row { grid-template-columns: 1fr; }
}


/* ============ FOOTER ============ */
.footer {
  background: var(--navy);
  color: var(--text-inverse);
  padding: var(--space-3xl) 0 var(--space-xl);
}
.footer__inner { max-width: var(--max-width); margin: 0 auto; padding: 0 var(--space-xl); }
.footer__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2xl);
  padding-bottom: var(--space-2xl);
  border-bottom: 1px solid rgba(255,255,255,0.07);
  margin-bottom: var(--space-xl);
}
.footer__brand { display: flex; flex-direction: column; gap: var(--space-sm); }
.footer__logo { width: 140px; }
.footer__tagline {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  color: var(--text-muted);
  letter-spacing: 0.04em;
}
.footer__links { display: flex; gap: var(--space-lg); flex-wrap: wrap; }
.footer__links a {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-sm);
  color: var(--text-muted);
  transition: color 0.2s ease;
}
.footer__links a:hover { color: var(--white); }

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-md);
}
.footer__promise { font-size: var(--fs-sm); color: var(--text-muted); max-width: 400px; }
.footer__copy {
  font-family: 'Space Grotesk', sans-serif;
  font-size: var(--fs-xs);
  color: rgba(255,255,255,0.62);
  white-space: nowrap;
}

@media (max-width: 768px) {
  .footer__top { flex-direction: column; gap: var(--space-xl); }
  .footer__bottom { flex-direction: column; text-align: center; }
  .footer__promise { max-width: none; }
}


/* ---------- Print ---------- */
@media print {
  .nav, .hero__scroll, .hero__bg, .lang-toggle, .nav__burger { display: none !important; }
  .hero { min-height: auto; padding-top: var(--space-xl); }
  body { color: #000; background: #fff; }
  .reveal { opacity: 1; transform: none; }
}

/* ============ V4 VISUAL REFINEMENT ============
   Product-led, editorial layout informed by Zerith's restrained dark/light rhythm.
   The official brand-board crops are the visual source of truth. */
:root {
  --bg-dark: #0a0a10;
  --bg-darker: #07070b;
  --bg-light: #f4f5f7;
  --max-width: 1320px;
  --nav-height: 64px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --fs-hero: clamp(3.6rem, 5.1vw, 5.25rem);
}

body { background: #fff; }
.section { padding: clamp(6rem, 10vw, 10rem) 0; }
.section__inner { padding-inline: clamp(1.25rem, 4vw, 3.5rem); }
.section__head { max-width: 880px; margin-bottom: clamp(3rem, 6vw, 5.5rem); }
.section__title { font-size: clamp(2.5rem, 4.8vw, 5.25rem); line-height: .98; letter-spacing: -.055em; }
.section__sub { max-width: 650px; font-size: clamp(1rem, 1.3vw, 1.2rem); }
.kicker { padding: 0; background: none; border-radius: 0; letter-spacing: .16em; }

.nav {
  background: rgba(255,255,255,.9);
  border-bottom-color: rgba(10,16,41,.08);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}
.nav__inner { max-width: 1440px; padding-inline: clamp(1.25rem, 4vw, 3.5rem); }
.brand__mark { width: 132px; height: 43px; object-fit: cover; object-position: center; mix-blend-mode: multiply; }
.brand__cn { font-size: .7rem; }
.nav__links { gap: clamp(1rem, 2vw, 2rem); }
.nav__cta { border-radius: 7px; padding: 9px 17px !important; box-shadow: none !important; }

.hero {
  min-height: max(760px, 100svh);
  color: var(--navy);
  background: #f7f8fa;
  padding-top: calc(var(--nav-height) + 2rem);
}
.hero::after {
  content: '';
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: rgba(10,16,41,.1);
}
.hero__bg { display: none; }
.hero__inner {
  width: 100%;
  max-width: 1440px;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, .95fr);
  gap: clamp(2rem, 5vw, 6rem);
  padding-inline: clamp(1.25rem, 4vw, 3.5rem);
}
.eyebrow { color: var(--blue); margin-bottom: 2rem; }
.eyebrow__dot { background: var(--blue); animation: none; }
.hero__title { color: var(--navy); font-size: var(--fs-hero); line-height: 1.02; letter-spacing: -.045em; margin-bottom: 2rem; }
.hero__title-line + .hero__title-line { margin-top: .08em; }
.hero__title-accent { background: none; -webkit-text-fill-color: var(--blue); color: var(--blue); }
.hero__tagline { color: var(--navy); font-size: clamp(1.25rem, 2vw, 1.75rem); }
.hero__lede { color: #556078; max-width: 560px; font-size: 1.05rem; }
.btn { border-radius: 7px; padding: 13px 22px; }
.btn--outline { color: var(--navy); border-color: rgba(10,16,41,.2); }
.btn--outline:hover { border-color: var(--navy); background: var(--navy); box-shadow: none; }
.hero__visual { align-self: stretch; min-height: 610px; }
.hero__img-wrap {
  width: 100%;
  height: 100%;
  max-width: none;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: none;
  background: #071426;
}
.hero__img { width: 100%; height: 100%; object-fit: contain; object-position: center bottom; border-radius: 0; image-rendering: auto; }
.hero__img-shade { background: linear-gradient(180deg, transparent 65%, rgba(7,12,30,.18)); border-radius: 0; }
.hud { display: none; }
.hero__scroll { color: #64748b; }

.promise { background: #fff; }
.promise__grid { grid-template-columns: 1.15fr .85fr; gap: clamp(3rem, 8vw, 8rem); }
.promise__lead { border: 0; padding: 0; font-size: clamp(1.35rem, 2.2vw, 2rem); line-height: 1.5; }
.promise__points li { border-top: 1px solid rgba(10,16,41,.12); padding-top: 1.5rem; }

.positioning { background: #f4f5f7; }
.positioning__layout { grid-template-columns: minmax(0, 1.25fr) minmax(300px, .75fr); gap: clamp(3rem, 7vw, 7rem); }
.positioning__img { margin-top: 3rem; border-radius: 10px; box-shadow: 0 30px 70px rgba(10,16,41,.12); background: #fff; }
.pos-img { aspect-ratio: 1.47 / 1; object-fit: cover; object-position: center; border-radius: 10px; }
.pos-img__cap { display: none; }
.pos-card { border-radius: 8px; box-shadow: none; border-color: rgba(10,16,41,.1); }

.vision { background: #0a0a10; }
.capabilities { background: #fff; }
.pstep { border-radius: 6px; }
.pdetail { border-radius: 10px; box-shadow: none; }

.console { background: #0a0a10; }
.console__board { border-radius: 12px; background: #121219; box-shadow: none; }
.console__app-mark { width: 28px; height: 28px; object-fit: cover; object-position: 50% 42%; border-radius: 7px; }
.console__dots { margin-left: 2px; }

.scenarios { background: #fff; }
.scenario__grid { gap: 1px; background: rgba(10,16,41,.11); border: 1px solid rgba(10,16,41,.11); }
.scenario-card { min-height: 360px; border: 0; border-radius: 0; box-shadow: none; padding: clamp(1.5rem, 3vw, 2.5rem); }
.scenario-card:hover { transform: none; background: #f4f6fa; box-shadow: inset 0 3px var(--blue); }
.scenario-card::before { display: none; }

.arch { background: #0a0a10; }
.arch__layer { border-radius: 7px; }
.about { background: #f4f5f7; }
.about__layout { gap: clamp(3rem, 8vw, 8rem); }
.news { display: none; }
.manifesto { background: var(--blue); }
.manifesto::before { display: none; }
.contact { background: #fff; }
.contact__form { border-radius: 10px; box-shadow: none; }
.footer { background: #08080c; }
.footer__logo { height: 32px; object-fit: contain; object-position: left center; filter: brightness(0) invert(1); }

@media (max-width: 960px) {
  .hero { min-height: auto; padding: calc(var(--nav-height) + 4rem) 0 5rem; }
  .hero__inner { grid-template-columns: 1fr; text-align: left; }
  .hero__copy { order: 0; }
  .hero__visual { order: 1; min-height: min(78vw, 620px); }
  .hero__actions, .eyebrow { justify-content: flex-start; }
  .hero__lede { margin-left: 0; }
  .hero__scroll { display: none; }
  .positioning__layout { grid-template-columns: 1fr; }
}

@media (max-width: 640px) {
  .section { padding: 5rem 0; }
  .hero__inner { width: auto; max-width: 100%; margin-inline: 0; }
  .hero__copy { width: 100%; overflow: visible; }
  .hero__title { font-size: clamp(2.7rem, 12vw, 3.5rem); line-height: 1.07; }
  .hero__lede { width: 100%; max-width: 100%; font-size: .98rem; overflow-wrap: anywhere; word-break: break-word; }
  .hero__visual { min-height: 420px; }
  .brand__mark { width: 112px; height: 37px; }
  .lang-toggle { display: none; }
  .nav__tools { flex-shrink: 0; }
  .nav__burger { display: flex !important; flex-shrink: 0; }
  .scenario-card { min-height: 280px; }
  .console__app-mark { display: none; }
}