/* =========================================================
   轻量动态特效 · MILITEC
   设计原则：仅用 opacity / transform / box-shadow，
   不改变任何布局流与功能。尊重 prefers-reduced-motion。
   ========================================================= */

/* 滚动渐入：默认隐藏，进入视口加 .in 显示 */
html.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .6s cubic-bezier(.22, .61, .36, 1),
              transform .6s cubic-bezier(.22, .61, .36, 1);
  will-change: opacity, transform;
}
html.js .reveal.in {
  opacity: 1;
  transform: none;
}

/* 卡片 hover 微动效（增强已有的 transition: all .3s） */
.ucard:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0, 0, 0, .10);
}
.mfg-chips span {
  transition: transform .25s ease, box-shadow .25s ease, background .25s ease;
}
.mfg-chips span:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(0, 0, 0, .08);
}

/* 官网按钮流光特效 */
.official-link {
  position: relative;
  overflow: hidden;
}
.official-link::before {
  content: "";
  position: absolute;
  top: 0;
  left: -60%;
  width: 50%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, .45), transparent);
  transform: skewX(-20deg);
  animation: officialSheen 3.2s ease-in-out infinite;
  pointer-events: none;
}
@keyframes officialSheen {
  0%   { left: -60%; }
  60%, 100% { left: 130%; }
}

/* 导航滚动阴影（纯附加，不改布局） */
.sn-navbar.scrolled {
  box-shadow: 0 6px 24px rgba(0, 0, 0, .10);
}

/* 无障碍：尊重 prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  html.js .reveal {
    opacity: 1 !important;
    transform: none !important;
    transition: none !important;
  }
  html { scroll-behavior: auto; }
  .official-link::before { animation: none; display: none; }
  .ucard:hover,
  .mfg-chips span:hover { transform: none; }
  .sn-navbar.scrolled { box-shadow: none; }
}