/* 全站基础体验层：仅消费语义 token，不绑定具体页面或主题。 */
:root {
  --radius-xs: 0.375rem;
  --radius-sm: 0.5rem;
  --radius-md: 0.75rem;
  --radius-lg: 1rem;
  --radius-xl: 1.25rem;
  --shadow-sm: 0 0.125rem 0.5rem var(--color-shadow);
  --shadow-md: 0 0.625rem 1.75rem var(--color-shadow);
  --shadow-lg: 0 1.25rem 3.5rem var(--color-shadow);
  --focus-ring: 0 0 0 0.2rem color-mix(in srgb, var(--color-accent) 28%, transparent);
  --motion-instant: 100ms;
  --motion-fast: 160ms;
  --motion-normal: 240ms;
  --motion-slow: 360ms;
  --ease-standard: cubic-bezier(0.2, 0, 0, 1);
  --ease-emphasized: cubic-bezier(0.22, 1, 0.36, 1);
}

:where(a, button, input, textarea, select, [tabindex]):focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  box-shadow: var(--focus-ring);
}

:where(button, a, input, textarea, select) {
  -webkit-tap-highlight-color: transparent;
}

.xt-surface,
.xt-skeleton,
.xt-loading-block,
.xt-empty-state {
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
}

.xt-surface {
  box-shadow: var(--shadow-sm);
}

.xt-empty-state {
  display: grid;
  place-items: center;
  min-height: 8rem;
  padding: 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  background: color-mix(in srgb, var(--color-surface-muted) 76%, transparent);
  border-style: dashed;
}

.xt-skeleton {
  position: relative;
  overflow: hidden;
  min-height: 1rem;
  border-color: transparent;
  background: color-mix(in srgb, var(--color-text) 7%, var(--color-surface));
}

.xt-skeleton::after {
  content: "";
  position: absolute;
  inset: 0;
  transform: translateX(-100%);
  background: linear-gradient(90deg, transparent, color-mix(in srgb, var(--color-text) 10%, transparent), transparent);
  animation: xt-skeleton-sweep 1.4s var(--ease-standard) infinite;
}

.xt-fade-in {
  animation: xt-fade-in var(--motion-slow) var(--ease-emphasized) both;
}

.xt-rise-in {
  animation: xt-rise-in var(--motion-slow) var(--ease-emphasized) both;
}

@keyframes xt-skeleton-sweep {
  to { transform: translateX(100%); }
}

@keyframes xt-fade-in {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes xt-rise-in {
  from { opacity: 0; transform: translateY(0.75rem); }
  to { opacity: 1; transform: translateY(0); }
}

@media (prefers-reduced-motion: reduce) {
  .xt-skeleton::after,
  .xt-fade-in,
  .xt-rise-in {
    animation: none !important;
  }
}

/* 首页保留既有信息结构，只降低装饰噪声并统一层级。 */
body.page-home.cyber-theme {
  background:
    radial-gradient(ellipse at 16% 12%, color-mix(in srgb, var(--color-accent) 14%, transparent) 0%, transparent 42%),
    radial-gradient(ellipse at 84% 76%, color-mix(in srgb, var(--color-info) 10%, transparent) 0%, transparent 48%),
    linear-gradient(180deg, var(--color-page) 0%, color-mix(in srgb, var(--color-page) 88%, #020617) 100%) !important;
}

body.page-home .scan-line,
body.page-home .diagonal-lines,
body.page-home .bottom-fade { display: none; }
body.page-home .cyber-grid { opacity: 0.55; background-size: 84px 84px; }
body.page-home .neon-glow { opacity: 0.08; filter: blur(140px); }
body.page-home .hero-section { padding-block: clamp(3.5rem, 8vh, 6rem); }
body.page-home .hero-title { letter-spacing: -0.025em; text-wrap: balance; }
body.page-home .hero-subtitle { max-width: 30rem; color: color-mix(in srgb, var(--color-text) 72%, transparent); }
body.page-home .btn-neon {
  border: 1px solid color-mix(in srgb, var(--color-accent) 48%, transparent);
  border-radius: var(--radius-md, 0.75rem);
  padding: 0.9rem 1.5rem;
  color: var(--color-accent-fg);
  background: var(--color-accent);
  box-shadow: 0 0.75rem 1.75rem color-mix(in srgb, var(--color-accent) 24%, transparent);
  letter-spacing: 0.04em;
  text-transform: none;
  transition: transform var(--motion-fast) var(--ease-standard), box-shadow var(--motion-fast) var(--ease-standard), background var(--motion-fast) var(--ease-standard);
}
body.page-home .btn-neon::before,
body.page-home .btn-neon::after { display: none; }
body.page-home .btn-neon:hover { color: var(--color-accent-fg); transform: translateY(-2px); box-shadow: 0 1rem 2.25rem color-mix(in srgb, var(--color-accent) 32%, transparent); }
body.page-home .btn-neon:active { transform: translateY(0); }
body.page-home .terminal-window,
body.page-home .feature-card,
body.page-home .platform-intro .feature-block { border-color: var(--color-border); box-shadow: var(--shadow-md); }
body.page-home .terminal-window { border-radius: var(--radius-lg, 1rem); }
body.page-home .feature-card { border-radius: var(--radius-md, 0.75rem); }
body.page-home .feature-card::before { display: none; }
body.page-home .feature-card:hover { transform: translateY(-4px); border-color: var(--color-border-strong); box-shadow: var(--shadow-lg); }
body.page-home .feature-icon { animation: none; }
body.page-home .feature-card:hover .feature-icon { transform: translateY(-2px) scale(1.03); }
body.page-home .ticker-content { animation-duration: 48s; }
body.page-home .platform-intro .feature-block { border-radius: var(--radius-xl, 1.25rem); }
body.page-home .platform-intro .feature-block:hover { box-shadow: var(--shadow-lg); }
body.page-home .platform-intro .feature-img { animation: none !important; }
body.page-home .platform-intro .feature-img img { transition: transform var(--motion-normal) var(--ease-emphasized), box-shadow var(--motion-normal) var(--ease-standard); }
body.page-home .platform-intro .feature-block:hover .feature-img img { transform: scale(1.025); }

@media (prefers-reduced-motion: reduce) {
  body.page-home .ticker-content { animation: none; }
  body.page-home .platform-intro .feature-block { opacity: 1; transform: none; }
}