/* ==========================================================================
   fx.css — 科技感氛围层：网格 / 噪点 / HUD / 扫描线 / 光晕
   ========================================================================== */

.fx-root {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.fx-grid {
  position: absolute;
  inset: -20%;
  background-image:
    linear-gradient(rgba(30, 224, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 224, 255, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at 50% 30%, #000 20%, transparent 75%);
  animation: gridDrift 28s linear infinite;
  opacity: 0.55;
}

.fx-grain {
  position: absolute;
  inset: -20%;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' opacity='.55'/%3E%3C/svg%3E");
  opacity: 0.09;
  mix-blend-mode: overlay;
  animation: grainShift 0.35s steps(2) infinite;
}

.fx-vignette {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, transparent 40%, rgba(0, 0, 0, 0.38) 100%);
}

.fx-particles {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
}

.fx-pointer {
  position: absolute;
  width: 42vw;
  height: 42vw;
  max-width: 560px;
  max-height: 560px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(30, 224, 255, 0.14) 0%, transparent 68%);
  transform: translate(-50%, -50%);
  left: var(--mx, 70%);
  top: var(--my, 28%);
  transition: left 0.35s var(--ease-out), top 0.35s var(--ease-out);
  filter: blur(8px);
}

@keyframes gridDrift {
  from { transform: translate3d(0, 0, 0); }
  to { transform: translate3d(-56px, -56px, 0); }
}

@keyframes grainShift {
  0% { transform: translate(0, 0); }
  100% { transform: translate(-2%, 1%); }
}

@keyframes scanSweep {
  0% { transform: translateY(-100%); opacity: 0; }
  12% { opacity: 0.55; }
  100% { transform: translateY(220%); opacity: 0; }
}

@keyframes pulseGlow {
  0%, 100% { opacity: 0.55; box-shadow: 0 0 0 0 rgba(30, 224, 255, 0.45); }
  50% { opacity: 1; box-shadow: 0 0 0 8px rgba(30, 224, 255, 0); }
}

@keyframes kenBurns {
  from { transform: scale(1.06) translate3d(0, 0, 0); }
  to { transform: scale(1.16) translate3d(-1.5%, 1%, 0); }
}

@keyframes floatY {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

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

@keyframes hudBlink {
  0%, 80%, 100% { opacity: 1; }
  90% { opacity: 0.35; }
}

/* HUD 角标 */
.hud-corners {
  position: absolute;
  inset: 12px;
  pointer-events: none;
  z-index: 2;
}
.hud-corners span {
  position: absolute;
  width: 22px;
  height: 22px;
  border-color: var(--color-primary);
  border-style: solid;
  opacity: 0.7;
}
.hud-corners .tl { top: 0; left: 0; border-width: 2px 0 0 2px; }
.hud-corners .tr { top: 0; right: 0; border-width: 2px 2px 0 0; }
.hud-corners .bl { bottom: 0; left: 0; border-width: 0 0 2px 2px; }
.hud-corners .br { bottom: 0; right: 0; border-width: 0 2px 2px 0; }

/* 扫描线 */
.scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  overflow: hidden;
  border-radius: inherit;
}
.scanlines::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 28%;
  background: linear-gradient(180deg, transparent, rgba(30, 224, 255, 0.18), transparent);
  animation: scanSweep 5.5s var(--ease-in-out) infinite;
}

/* 媒体填充 */
.media-fill {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.media-ken {
  animation: kenBurns 22s var(--ease-in-out) infinite alternate;
  will-change: transform;
}

/* 跑马灯 */
.tech-marquee {
  overflow: hidden;
  border-block: 1px solid var(--color-border);
  background: rgba(8, 16, 28, 0.7);
  padding-block: 14px;
}
.tech-marquee-track {
  display: flex;
  width: max-content;
  animation: marquee 32s linear infinite;
  font-family: var(--font-mono);
  font-size: var(--text-sm);
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--color-primary);
}
.tech-marquee-track span {
  padding-inline: 28px;
  white-space: nowrap;
  opacity: 0.8;
}
.tech-marquee-track span::before {
  content: "◈ ";
  opacity: 0.5;
}

/* 场景条 */
.scene-strip {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: var(--space-4);
}
.scene-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  min-height: 280px;
  border: 1px solid var(--color-border);
  isolation: isolate;
}
.scene-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.8s var(--ease-out);
}
.scene-card:hover img {
  transform: scale(1.06);
}
.scene-card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-6) var(--space-5) var(--space-5);
  background: linear-gradient(transparent, rgba(3, 8, 16, 0.92));
  color: #fff;
  font-weight: 600;
  font-size: var(--text-lg);
  letter-spacing: 0.04em;
}
.scene-card figcaption small {
  display: block;
  margin-top: 4px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 400;
  letter-spacing: 0.16em;
  color: var(--color-primary);
  text-transform: uppercase;
}

@media (max-width: 900px) {
  .scene-strip {
    grid-template-columns: 1fr;
  }
  .scene-card { min-height: 220px; }
}

/* 卡片媒体头图 */
.card-media {
  position: relative;
  height: 168px;
  overflow: hidden;
  margin: calc(var(--space-8) * -1) calc(var(--space-8) * -1) var(--space-6);
}
.card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.7s var(--ease-out);
}
.service-card:hover .card-media img,
.solution-card:hover .card-media img,
.case-card:hover .card-media img {
  transform: scale(1.08);
}
.card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 30%, rgba(8, 13, 24, 0.55) 100%);
}

.service-feature .card-media {
  height: 220px;
}

/* 发光边框卡片 */
.glow-card {
  position: relative;
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04), var(--shadow-sm);
}
.glow-card::after {
  content: "";
  position: absolute;
  inset: -1px;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(135deg, rgba(30, 224, 255, 0.55), transparent 42%, transparent 62%, rgba(245, 185, 66, 0.28));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0.55;
  pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out);
}
.glow-card:hover::after {
  opacity: 1;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #3dffc8;
  box-shadow: 0 0 0 4px rgba(61, 255, 200, 0.18);
  animation: pulseGlow 2.4s ease-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  .fx-grid,
  .fx-grain,
  .fx-pointer,
  .media-ken,
  .tech-marquee-track,
  .scanlines::after,
  .status-dot {
    animation: none !important;
  }
}