/* Active Theory inspired — homepage only */
.page-home {
  --at-bg: #030308;
  --at-surface: rgba(255, 255, 255, 0.03);
  --at-border: rgba(255, 255, 255, 0.08);
  --at-text: #f0f2f8;
  --at-muted: rgba(240, 242, 248, 0.55);
  --at-accent: #00e5c7;
  --at-accent-2: #7c6cff;
  --at-glow: rgba(0, 229, 199, 0.35);
  --font-display: "Syne", "PingFang SC", "Microsoft YaHei", sans-serif;
  --font-mono: "JetBrains Mono", "Consolas", monospace;

  background: var(--at-bg);
  color: var(--at-text);
  overflow-x: hidden;
  cursor: default;
}

/* 导航链接继承浅色；按钮单独指定颜色，避免白底白字 */
.page-home .main-nav--dark a,
.page-home .at-card__link,
.page-home .logo--dark {
  color: inherit;
}

/* Canvas & overlays */
.hero-canvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.grain {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

.cursor-glow {
  position: fixed;
  width: 400px;
  height: 400px;
  margin: -200px 0 0 -200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 229, 199, 0.08) 0%, transparent 70%);
  pointer-events: none;
  z-index: 2;
  transition: opacity 0.3s;
  opacity: 0;
}

.page-home:hover .cursor-glow {
  opacity: 1;
}

.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  height: 2px;
  width: 0;
  background: linear-gradient(90deg, var(--at-accent), var(--at-accent-2));
  z-index: 200;
  box-shadow: 0 0 12px var(--at-glow);
}

/* Dark header */
.page-home .site-header--dark {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  border-bottom: 1px solid transparent;
  transition: background 0.4s, border-color 0.4s, backdrop-filter 0.4s;
}

.page-home .site-header--dark.scrolled {
  background: rgba(3, 3, 8, 0.75);
  backdrop-filter: blur(16px);
  border-bottom-color: var(--at-border);
}

.logo--dark .logo-mark {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.2em;
  color: var(--at-text);
}

.logo--dark .logo-sub {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.35em;
  color: var(--at-muted);
}

.main-nav--dark a {
  color: var(--at-muted);
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-bottom-color: transparent;
}

.main-nav--dark a:hover,
.main-nav--dark a.active {
  color: var(--at-text);
  border-bottom-color: var(--at-accent);
}

.nav-toggle--dark span {
  background: var(--at-text);
}

@media (max-width: 768px) {
  .page-home .main-nav--dark {
    background: rgba(3, 3, 8, 0.95);
    backdrop-filter: blur(16px);
  }
}

.page-home main {
  position: relative;
  z-index: 10;
}

/* Hero */
.at-hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--header-h) + 48px) 0 80px;
  overflow: hidden;
}

.at-hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 70%);
}

.at-hero__inner {
  position: relative;
  z-index: 2;
}

.at-hero__meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  margin-bottom: 32px;
}

.at-pill {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  padding: 6px 14px;
  border: 1px solid var(--at-border);
  border-radius: 999px;
  color: var(--at-accent);
  background: rgba(0, 229, 199, 0.06);
}

.at-coords {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--at-muted);
  letter-spacing: 0.1em;
}

.at-hero__title {
  margin: 0 0 28px;
  font-family: var(--font-display);
  font-weight: 800;
  line-height: 0.95;
}

.at-line {
  display: block;
  font-size: clamp(2.5rem, 8vw, 5.5rem);
  letter-spacing: -0.02em;
}

.at-line--outline {
  color: transparent;
  -webkit-text-stroke: 1px rgba(255, 255, 255, 0.35);
  text-stroke: 1px rgba(255, 255, 255, 0.35);
}

.at-line--accent {
  background: linear-gradient(135deg, var(--at-accent) 0%, var(--at-accent-2) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.at-hero__desc {
  max-width: 520px;
  margin: 0 0 40px;
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--at-muted);
}

.at-hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 80px;
}

.at-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 999px;
  transition: transform 0.25s, box-shadow 0.25s, background 0.25s;
}

.at-btn:hover {
  text-decoration: none;
  transform: translateY(-2px);
}

.at-btn--primary,
.at-btn--primary span {
  background: #f0f2f8;
  color: #030308 !important;
  -webkit-text-fill-color: #030308 !important;
}

.at-btn--primary {
  box-shadow: 0 0 40px rgba(0, 229, 199, 0.2);
}

.at-btn--primary span {
  background: transparent;
}

.at-btn--primary svg {
  stroke: #030308;
  flex-shrink: 0;
}

.at-btn--primary:hover,
.at-btn--primary:hover span {
  color: #030308 !important;
  -webkit-text-fill-color: #030308 !important;
}

.at-btn--primary:hover {
  box-shadow: 0 0 60px rgba(0, 229, 199, 0.4);
}

.at-btn--ghost {
  border: 1px solid var(--at-border);
  color: var(--at-text);
  background: transparent;
}

.at-btn--ghost:hover {
  border-color: var(--at-accent);
  color: var(--at-accent);
}

.at-btn--sm {
  padding: 12px 22px;
  font-size: 0.72rem;
}

.at-btn--lg {
  padding: 18px 36px;
  font-size: 0.85rem;
}

.at-hero__scroll {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  color: var(--at-muted);
}

.at-hero__scroll-line {
  width: 48px;
  height: 1px;
  background: linear-gradient(90deg, var(--at-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleX(0.6); transform-origin: left; }
  50% { opacity: 1; transform: scaleX(1); }
}

.at-hero__orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
}

.at-hero__orb--1 {
  width: 500px;
  height: 500px;
  top: 10%;
  right: -10%;
  background: rgba(0, 229, 199, 0.12);
  animation: orbFloat 12s ease-in-out infinite;
}

.at-hero__orb--2 {
  width: 400px;
  height: 400px;
  bottom: 10%;
  left: -5%;
  background: rgba(124, 108, 255, 0.1);
  animation: orbFloat 15s ease-in-out infinite reverse;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0); }
  50% { transform: translate(30px, -20px); }
}

/* Marquee */
.at-marquee {
  position: relative;
  z-index: 10;
  border-block: 1px solid var(--at-border);
  padding: 20px 0;
  overflow: hidden;
  background: rgba(0, 0, 0, 0.4);
}

.at-marquee__track {
  display: flex;
  gap: 48px;
  width: max-content;
  animation: marquee 30s linear infinite;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.25em;
  color: var(--at-muted);
  white-space: nowrap;
}

.at-marquee__track span:nth-child(odd) {
  color: rgba(0, 229, 199, 0.5);
}

@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* Sections */
.at-section {
  padding: 100px 0;
  position: relative;
}

.at-section--product {
  background: linear-gradient(180deg, transparent, rgba(124, 108, 255, 0.04), transparent);
}

.at-section__head {
  margin-bottom: 56px;
}

.at-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--at-accent);
  margin-bottom: 12px;
}

.at-section__head h2,
.at-split__text h2,
.at-cta h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.1;
}

/* Cards */
.at-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.at-card {
  position: relative;
  padding: 32px;
  background: var(--at-surface);
  border: 1px solid var(--at-border);
  border-radius: 16px;
  overflow: hidden;
  transition: transform 0.4s, border-color 0.4s;
}

.at-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0, 229, 199, 0.05), transparent 50%);
  opacity: 0;
  transition: opacity 0.4s;
}

.at-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 229, 199, 0.25);
}

.at-card:hover::before {
  opacity: 1;
}

.at-card__top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
}

.at-card__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--at-muted);
}

.at-card__glow {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: radial-gradient(circle, var(--at-glow), transparent 70%);
}

.at-card__glow--cyan {
  background: radial-gradient(circle, rgba(0, 229, 199, 0.4), transparent 70%);
}

.at-card__glow--violet {
  background: radial-gradient(circle, rgba(124, 108, 255, 0.4), transparent 70%);
}

.at-card h3 {
  margin: 0 0 12px;
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
}

.at-card p {
  margin: 0 0 20px;
  font-size: 0.9rem;
  color: var(--at-muted);
  line-height: 1.7;
}

.at-card__link {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--at-accent);
  text-decoration: none;
}

.at-card__link:hover {
  text-decoration: underline;
}

/* Product split */
.at-split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.at-hud {
  position: relative;
  aspect-ratio: 1;
  max-width: 420px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.at-hud__ring {
  position: absolute;
  inset: 0;
  border: 1px solid var(--at-border);
  border-radius: 50%;
  animation: hudSpin 20s linear infinite;
}

.at-hud__ring::before,
.at-hud__ring::after {
  content: "";
  position: absolute;
  inset: 12%;
  border: 1px dashed rgba(0, 229, 199, 0.2);
  border-radius: 50%;
}

.at-hud__ring::after {
  inset: 24%;
  animation: hudSpin 15s linear infinite reverse;
}

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

.at-hud__core {
  text-align: center;
  z-index: 1;
  padding: 40px;
  background: rgba(3, 3, 8, 0.8);
  border: 1px solid var(--at-border);
  border-radius: 50%;
  width: 55%;
  aspect-ratio: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(8px);
}

.at-hud__label {
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.2em;
  color: var(--at-muted);
  margin-bottom: 8px;
}

.at-hud__core strong {
  font-family: var(--font-display);
  font-size: 1.5rem;
  display: block;
  margin-bottom: 12px;
  color: #f0f2f8;
  -webkit-text-fill-color: #f0f2f8;
}

.at-hud__status {
  display: flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--at-accent);
  letter-spacing: 0.15em;
}

.at-hud__status i {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--at-accent);
  box-shadow: 0 0 8px var(--at-accent);
  animation: blink 2s ease-in-out infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.at-hud__stats {
  position: absolute;
  list-style: none;
  margin: 0;
  padding: 0;
  inset: 0;
}

.at-hud__stats li {
  position: absolute;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  line-height: 1.4;
  padding: 10px 14px;
  border: 1px solid rgba(0, 229, 199, 0.35);
  border-radius: 8px;
  background: rgba(10, 12, 22, 0.95);
  color: #e8ebf2;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  min-width: 72px;
  text-align: center;
}

.at-hud__stats li:nth-child(1) { top: 8%; left: 50%; transform: translateX(-50%); }
.at-hud__stats li:nth-child(2) { right: 0; top: 50%; transform: translateY(-50%); }
.at-hud__stats li:nth-child(3) { bottom: 8%; left: 50%; transform: translateX(-50%); }

.at-hud__stats em {
  display: block;
  color: #00e5c7;
  font-style: normal;
  font-weight: 600;
  -webkit-text-fill-color: #00e5c7;
}

.at-hud__stats span {
  display: block;
  color: #b8beca;
  -webkit-text-fill-color: #b8beca;
}

.at-split__text p {
  color: var(--at-muted);
  line-height: 1.8;
  margin: 20px 0 28px;
}

.at-features {
  list-style: none;
  padding: 0;
  margin: 0 0 32px;
}

.at-features li {
  position: relative;
  padding: 10px 0 10px 24px;
  font-size: 0.95rem;
  color: var(--at-muted);
  border-bottom: 1px solid var(--at-border);
}

.at-features li::before {
  content: "→";
  position: absolute;
  left: 0;
  color: var(--at-accent);
  font-family: var(--font-mono);
}

/* Tags */
.at-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.at-tags span {
  padding: 12px 22px;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.06em;
  border: 1px solid var(--at-border);
  border-radius: 8px;
  background: var(--at-surface);
  transition: transform 0.2s, border-color 0.2s, color 0.2s;
}

.at-tags span:hover {
  border-color: var(--at-accent);
  color: var(--at-accent);
  transform: translateY(-2px);
}

/* CTA */
.at-cta {
  padding: 120px 0;
  text-align: center;
}

.at-cta__inner {
  padding: 80px 40px;
  border: 1px solid var(--at-border);
  border-radius: 24px;
  background:
    radial-gradient(ellipse at 50% 0%, rgba(0, 229, 199, 0.08), transparent 60%),
    var(--at-surface);
}

.at-cta h2 span {
  background: linear-gradient(135deg, var(--at-accent), var(--at-accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.at-cta p {
  color: var(--at-muted);
  margin: 16px 0 32px;
}

/* Dark footer */
.site-footer--dark {
  position: relative;
  z-index: 10;
  background: #000;
  border-top: 1px solid var(--at-border);
}

.site-footer--dark .footer-company {
  color: var(--at-text);
}

.site-footer--dark .footer-icp a {
  color: var(--at-muted);
}

.site-footer--dark .footer-icp a:hover {
  color: var(--at-accent);
}

/* Reveal animations */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
  transition-delay: calc(var(--d, 0) * 0.1s);
}

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

/* Responsive */
@media (max-width: 900px) {
  .at-cards {
    grid-template-columns: 1fr;
  }

  .at-split {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .cursor-glow {
    display: none;
  }
}

@media (prefers-reduced-motion: reduce) {
  .at-marquee__track,
  .at-hud__ring,
  .at-hero__orb,
  .at-hero__scroll-line {
    animation: none;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}