/* ============================================================
   天晟科技 · 动效与氛围层（motion layer）v2
   参考：motionsites.ai「Nova / Datacore」类深色科技模板
   只做视觉增强，不改任何产品区结构（后台管理保持兼容）
   设计原则：区别主要来自静态视觉（渐变文字 / 氛围背景 / 玻璃卡片），
   动画仅作加分；即使系统开启「减少动效」也能明显看出不同。
   ============================================================ */

:root {
  --glow-accent: color-mix(in srgb, var(--color-accent) 55%, transparent);
  --glow-warm: rgba(120, 160, 255, 0.40);
  --glow-cool: rgba(120, 150, 255, 0.24);
  --grid-line: rgba(140, 190, 255, 0.09);
}

/* ---------- 顶部滚动进度条 ---------- */
.scroll-progress {
  position: fixed; top: 0; left: 0; right: 0; height: 3px;
  z-index: 60; pointer-events: none;
}
.scroll-progress i {
  display: block; height: 100%; width: 0;
  background: linear-gradient(90deg, #4db2ff, #b8ecff, #4db2ff);
  box-shadow: 0 0 16px var(--glow-accent);
}

/* ---------- 背景氛围：光斑 + 网格 + 鼠标追光 ---------- */
.ambient {
  position: fixed; inset: 0; z-index: 0;
  pointer-events: none; overflow: hidden;
}
.ambient .grid-lines {
  position: absolute; inset: -1px;
  background-image:
    linear-gradient(var(--grid-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-line) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(125% 85% at 50% 0%, #000 0%, transparent 75%);
          mask-image: radial-gradient(125% 85% at 50% 0%, #000 0%, transparent 75%);
}
.ambient .blob {
  position: absolute; border-radius: 50%;
  filter: blur(56px); opacity: 0.9;
  will-change: transform;
}
.ambient .b1 {
  width: 48rem; height: 48rem; left: -16rem; top: -20rem;
  background: radial-gradient(circle at 35% 35%, var(--glow-accent), transparent 60%);
  animation: drift-a 26s ease-in-out infinite alternate;
}
.ambient .b2 {
  width: 40rem; height: 40rem; right: -14rem; top: 2rem;
  background: radial-gradient(circle at 60% 40%, var(--glow-warm), transparent 62%);
  animation: drift-b 32s ease-in-out infinite alternate;
}
.ambient .b3 {
  width: 44rem; height: 44rem; left: 32%; top: 58%;
  background: radial-gradient(circle at 50% 50%, var(--glow-cool), transparent 64%);
  animation: drift-c 38s ease-in-out infinite alternate;
}
@keyframes drift-a { to { transform: translate3d(7rem, 5rem, 0) scale(1.1); } }
@keyframes drift-b { to { transform: translate3d(-6rem, 7rem, 0) scale(1.14); } }
@keyframes drift-c { to { transform: translate3d(5rem, -7rem, 0) scale(1.08); } }

.ambient .spotlight {
  position: absolute; inset: 0;
  background: radial-gradient(
    24rem 24rem at var(--mx, 50%) var(--my, 18%),
    rgba(90, 170, 255, 0.12), transparent 66%);
  transition: background 120ms linear;
}

/* ---------- 导航：滚动后收紧 + 玻璃化 ---------- */
.site-header {
  transition: height var(--dur-base) var(--ease-out),
              background var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out),
              border-color var(--dur-base) var(--ease-out);
}
.site-header .wrap { transition: height var(--dur-base) var(--ease-out); }
.site-header.is-scrolled {
  background: color-mix(in srgb, var(--color-surface) 88%, transparent);
  box-shadow: 0 10px 34px rgba(0, 0, 0, 0.42);
  border-bottom-color: transparent;
  backdrop-filter: blur(10px);
}
.site-header.is-scrolled .wrap { height: 56px; }
.site-nav a { position: relative; }
.site-nav a::after {
  content: ""; position: absolute; left: 0; right: 0; bottom: -1px; height: 1px;
  background: var(--color-accent); transform: scaleX(0); transform-origin: left;
  transition: transform var(--dur-base) var(--ease-out);
}
.site-nav a:hover::after { transform: scaleX(1); }

/* ---------- Hero：徽标 / 渐变标题 / CTA ---------- */
.hero { position: relative; }
.hero::before {
  content: ""; position: absolute; inset: -10% -10% auto -10%; height: 70%;
  background: radial-gradient(80% 100% at 50% 0%, color-mix(in srgb, var(--color-accent) 14%, transparent), transparent 70%);
  pointer-events: none; z-index: -1;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  font-family: var(--font-mono); font-size: var(--fs-xs);
  letter-spacing: 0.06em; color: var(--color-muted);
  border: 1px solid var(--color-border);
  background: rgba(27, 24, 21, 0.6);
  backdrop-filter: blur(6px);
  border-radius: 999px; padding: 6px 14px; margin-bottom: var(--space-4);
}
.hero-badge i {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--color-ok); box-shadow: 0 0 12px var(--color-ok);
  animation: pulse-dot 2.4s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.45; transform: scale(0.8); }
}
.hero h1 {
  text-wrap: balance;
  text-shadow: 0 0 70px color-mix(in srgb, var(--color-accent) 28%, transparent);
}
/* 渐变文字填充（静态即明显，无需动画） */
.hero h1 .outline {
  background: linear-gradient(100deg, #4db2ff 0%, #b8ecff 38%, #4db2ff 70%, #8fd0ff 100%);
  background-size: 220% 100%;
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
  animation: hue-shift 9s ease-in-out infinite;
}
@keyframes hue-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.hero-cta {
  display: flex; flex-wrap: wrap; gap: var(--space-3);
  margin-bottom: var(--space-4);
}
.hero-cta .btn { min-height: 48px; padding: 0 26px; }
.hero-cta .btn.primary {
  box-shadow: 0 12px 34px color-mix(in srgb, var(--color-accent) 34%, transparent);
}
.hero-cta .btn.primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 44px color-mix(in srgb, var(--color-accent) 42%, transparent);
}
.hero-cta .ghost-note {
  align-self: center; font-family: var(--font-mono);
  font-size: var(--fs-xs); color: var(--color-muted);
}

.hero-meta { backdrop-filter: blur(2px); }
.hero-meta span { white-space: nowrap; }

.scroll-cue {
  display: inline-flex; align-items: center; gap: 8px;
  margin-top: var(--space-3);
  font-family: var(--font-mono); font-size: var(--fs-xs); color: var(--color-muted);
}
.scroll-cue::after {
  content: ""; width: 1px; height: 26px;
  background: linear-gradient(var(--color-accent), transparent);
  animation: cue 2s var(--ease-out) infinite;
}
@keyframes cue {
  0% { transform: scaleY(0.2); opacity: 0.2; }
  45% { transform: scaleY(1); opacity: 1; }
  100% { transform: scaleY(0.2); opacity: 0.2; }
}

/* ---------- 跑马灯：两端渐隐 + 悬停暂停 ---------- */
.marquee {
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
          mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee:hover .marquee-track { animation-play-state: paused; }

/* ---------- 产品卡：玻璃 + 悬停明显上浮辉光 ---------- */
.product {
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.04), transparent 42%),
    var(--color-surface);
  backdrop-filter: blur(6px);
  border: 1px solid var(--color-border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.30);
  transition: border-color var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              box-shadow var(--dur-base) var(--ease-out);
}
.product:hover {
  transform: translateY(-10px);
  border-color: color-mix(in srgb, var(--color-accent) 55%, transparent);
  box-shadow:
    0 30px 70px rgba(0, 0, 0, 0.50),
    0 0 0 1px color-mix(in srgb, var(--color-accent) 35%, transparent),
    0 0 40px color-mix(in srgb, var(--color-accent) 18%, transparent),
    inset 0 1px 0 rgba(255, 255, 255, 0.06);
}
.product .p-no { transition: -webkit-text-stroke-color var(--dur-base) var(--ease-out); }

/* ---------- 区块标题：编号前缀动效 ---------- */
.sec-head .no { position: relative; }
.sec-head h2 { text-wrap: balance; }

/* ---------- 关于 / CTA 面板：渐变描边 ---------- */
.about-facts { box-shadow: 0 20px 50px rgba(0, 0, 0, 0.35); }
.cta-panel {
  position: relative;
  background:
    radial-gradient(30rem 16rem at 100% 0%, color-mix(in srgb, var(--color-accent) 14%, transparent), transparent 60%),
    var(--color-surface-2);
  border: 1px solid var(--color-border);
  overflow: hidden;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.4);
}
.cta-panel::before {
  content: ""; position: absolute; left: 0; top: 0; height: 1px; right: 0;
  background: linear-gradient(90deg, transparent, var(--color-accent), transparent);
  opacity: 0.7;
}
.cta-panel .contact-line { letter-spacing: 0.04em; }

/* ---------- 回到顶部 ---------- */
.to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 40;
  width: 46px; height: 46px; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  border: 1px solid var(--color-border-strong);
  background: rgba(27, 24, 21, 0.9); color: var(--color-text);
  backdrop-filter: blur(8px); cursor: pointer; text-decoration: none;
  opacity: 0; transform: translateY(12px); pointer-events: none;
  transition: opacity var(--dur-base) var(--ease-out),
              transform var(--dur-base) var(--ease-out),
              border-color var(--dur-fast) ease-out, color var(--dur-fast) ease-out;
}
.to-top.show { opacity: 1; transform: none; pointer-events: auto; }
.to-top:hover { border-color: var(--color-accent); color: var(--color-accent); }

/* ---------- 小屏适配 ---------- */
@media (max-width: 820px) {
  .ambient .b1 { width: 32rem; height: 32rem; left: -12rem; top: -14rem; }
  .ambient .b2 { width: 28rem; height: 28rem; right: -10rem; }
  .ambient .b3 { width: 30rem; height: 30rem; left: 20%; }
  .ambient .grid-lines { background-size: 48px 48px; }
  .hero-cta .btn { flex: 1 1 100%; }
  .hero-badge { font-size: 0.7rem; }
  .to-top { right: 14px; bottom: 14px; }
}
@media (hover: none) {
  .ambient .spotlight { display: none; }
}