/* ============================================================
   盈波光电网站公共基础 P1
   职责：设计变量、基础容器、可访问性、移动页眉占位、通用降级。
   页面布局与页眉/页脚视觉分别由对应 CSS 负责。
   ============================================================ */

:root {
  --site-brand: #0057b8;
  --site-brand-strong: #0b63d6;
  --site-brand-soft: rgba(0, 87, 184, 0.08);
  --site-text: #1f2937;
  --site-text-muted: #64748b;
  --site-line: rgba(15, 23, 42, 0.08);
  --site-bg: #f3f6fa;
  --site-panel: #ffffff;
  --site-radius-lg: 20px;
  --site-radius-md: 16px;
  --site-radius-sm: 12px;
  --site-content-max: 1400px;
  --site-mobile-gutter: 16px;

  /* 兼容既有页面变量命名。 */
  --header-h: 92px;
  --header-h-md: 82px;
  --header-h-m: 68px;
  --header-bg: rgba(255, 255, 255, 0.88);
  --header-border: rgba(15, 23, 42, 0.08);
  --header-shadow: 0 14px 40px rgba(15, 23, 42, 0.08);
  --header-shadow-soft: 0 8px 26px rgba(15, 23, 42, 0.06);
  --brand: var(--site-brand);
  --brand-strong: var(--site-brand-strong);
  --brand-soft: var(--site-brand-soft);
  --text-main: var(--site-text);
  --text-sub: var(--site-text-muted);
  --line-soft: rgba(15, 23, 42, 0.06);
  --panel-bg: rgba(255, 255, 255, 0.97);
  --radius-lg: var(--site-radius-lg);
  --radius-md: var(--site-radius-md);
  --radius-sm: var(--site-radius-sm);
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body.site-nav-open {
  overflow: hidden;
  touch-action: none;
}

button,
input,
textarea,
select {
  font: inherit;
}

button {
  -webkit-tap-highlight-color: transparent;
}

[hidden] {
  display: none !important;
}

/* 供遗留模板和后续页面复用的安全容器，不影响现有 .w1400。 */
.container {
  width: min(var(--site-content-max), calc(100% - 48px));
  margin-left: auto;
  margin-right: auto;
}

button:focus-visible,
a:focus-visible,
[role="button"]:focus-visible,
input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  outline: 2px solid rgba(11, 99, 214, 0.88);
  outline-offset: 3px;
}

/* 公共交互触发器统一清除浏览器默认外观。 */
.nav_menu,
.top_search_trigger,
.nav_sub_toggle,
.moblie-search-close {
  border: 0;
  padding: 0;
  margin: 0;
  font: inherit;
  color: inherit;
  background-color: transparent;
  cursor: pointer;
  appearance: none;
  -webkit-appearance: none;
}

/* 桌面二级导航：hover + 键盘 focus 均可访问。 */
@media screen and (min-width: 1024px) {
  .nav_sub_toggle {
    display: none !important;
  }

  .ly_top .lytop_main .top_right .nav li:focus-within > .nav_item_open {
    visibility: visible;
    opacity: 1;
    -webkit-transform: translate(-50%, 0);
    transform: translate(-50%, 0);
  }
}

@media screen and (max-width: 1023px) {
  body {
    padding-top: var(--header-h-m, 68px);
  }

  body > .apple-banner,
  body > .hero-banner {
    margin-top: 0 !important;
  }

  .ly_top .lytop_main .top_right .nav li {
    position: relative;
  }

  .ly_top .lytop_main .top_right .nav li > a {
    padding-right: 64px;
  }

  .nav_sub_toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    position: absolute;
    top: 11px;
    right: 12px;
    z-index: 8;
    width: 36px;
    height: 36px;
    border: 1px solid rgba(0, 87, 184, 0.10);
    border-radius: 12px;
    background: rgba(0, 87, 184, 0.055);
    color: #0b63d6;
    transition: background-color .24s ease, border-color .24s ease, transform .24s ease;
  }

  .nav_sub_toggle:hover,
  .nav_sub_toggle:focus-visible {
    background: rgba(0, 87, 184, 0.10);
    border-color: rgba(0, 87, 184, 0.20);
  }

  .nav_sub_toggle span,
  .nav_sub_toggle span::before {
    content: "";
    display: block;
    position: absolute;
    left: 50%;
    top: 50%;
    width: 12px;
    height: 2px;
    border-radius: 999px;
    background: currentColor;
    transform: translate(-50%, -50%);
    transition: transform .24s ease, opacity .24s ease;
  }

  .nav_sub_toggle span::before {
    transform: translate(-50%, -50%) rotate(90deg);
  }

  .ly_top .lytop_main .top_right .nav li.on > .nav_sub_toggle span::before {
    opacity: 0;
    transform: translate(-50%, -50%) rotate(0deg);
  }

  .ly_top .lytop_main .top_right .nav li.on > .nav_sub_toggle {
    background: rgba(0, 87, 184, 0.13);
    border-color: rgba(0, 87, 184, 0.22);
  }

  .ly_top .lytop_main .top_right .nav li.on > .nav_item_open {
    display: block;
  }
}

@media screen and (max-width: 767px) {
  .container {
    width: calc(100% - 32px);
  }
}

/* 产品正文图片加载失败时的统一降级。 */
.pview_broken_image {
  display: block !important;
  width: min(100%, 920px) !important;
  height: auto !important;
  min-height: 180px;
  margin: 18px auto !important;
  object-fit: contain !important;
  border: 1px solid rgba(15, 23, 42, 0.08);
  border-radius: 18px;
  background: linear-gradient(145deg, #f7faff, #eef4fb);
}

.pview_gallery_thumb img.pview_broken_image {
  width: 100% !important;
  height: 100% !important;
  min-height: 0;
  margin: 0 !important;
  border: 0;
  border-radius: inherit;
  object-fit: contain !important;
}

.pview_placeholder_removed {
  display: none !important;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
    scroll-behavior: auto !important;
  }
}