:root {
  --color-paper: oklch(96% 0.014 96);
  --color-paper-2: oklch(99% 0.006 96);
  --color-ink: oklch(22% 0.035 171);
  --color-ink-2: oklch(33% 0.05 168);
  --color-rule: oklch(22% 0.035 171 / 14%);
  --color-accent: oklch(48% 0.105 164);
  --color-accent-bright: oklch(88% 0.16 126);
  --color-focus: oklch(72% 0.16 154);
  --font-display: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  --font-body: "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  --font-mono: Arial, sans-serif;
  --space-3xs: .25rem;
  --space-2xs: .5rem;
  --space-xs: .75rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4.5rem;
  --space-3xl: 7rem;
  --text-xs: .75rem;
  --text-sm: .875rem;
  --text-md: 1.125rem;
  --text-lg: 1.375rem;
  --text-xl: 1.75rem;
  --text-2xl: 2.25rem;
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --ease-in: cubic-bezier(.7, 0, .84, 0);
  --ease-in-out: cubic-bezier(.65, 0, .35, 1);
  --dur-short: 220ms;
  --dur-medium: 420ms;
  --radius-control: 0;
  --radius-panel: 0;
}

/* Shared product-center flyout navigation. */
@media (min-width: 821px) {
  .site-header .site-nav > a.language-switch { margin-left: .1rem; padding-left: .85rem; border-left: 1px solid rgba(28,65,54,.24); color: var(--forest, #123028); font-size: 11px; font-weight: 800; letter-spacing: .06em; }
  .site-header .site-nav { align-items: center; }
  .site-header .site-nav > a,
  .site-header .site-nav > .nav-product > a,
  .site-header .site-nav > .nav-product > .nav-product-trigger {
    position: relative;
    display: block;
    padding: 0;
    color: #334a42;
    font: 700 .8125rem/1.4 var(--font-body);
    white-space: nowrap;
    text-decoration: none;
  }
  .site-header .site-nav > .nav-product { position: relative; display: flex; align-items: center; line-height: 1; }
  .site-header .site-nav > .nav-product::before { content: ""; position: absolute; z-index: 3; top: 100%; left: -1rem; right: -1rem; height: 1.5rem; }
  .site-header .site-nav > .nav-product > .nav-product-trigger { border: 0; background: transparent; cursor: pointer; }
  .site-header .site-nav > a::after,
  .site-header .site-nav > .nav-product > a::after,
  .site-header .site-nav > .nav-product > .nav-product-trigger::after {
    content: "";
    position: absolute;
    left: 0;
    right: 100%;
    bottom: -.625rem;
    height: 2px;
    background: var(--forest, var(--color-accent));
    transition: right var(--dur-short) var(--ease-out);
  }
  .site-header .site-nav > a:hover,
  .site-header .site-nav > a[aria-current="page"],
  .site-header .site-nav > .nav-product > a:hover,
  .site-header .site-nav > .nav-product > a[aria-current="page"],
  .site-header .site-nav > .nav-product > .nav-product-trigger:hover,
  .site-header .site-nav > .nav-product > .nav-product-trigger[aria-current="page"] { color: var(--forest, var(--color-accent)); }
  .site-header .site-nav > a:hover::after,
  .site-header .site-nav > a[aria-current="page"]::after,
  .site-header .site-nav > .nav-product > a:hover::after,
  .site-header .site-nav > .nav-product > a[aria-current="page"]::after,
  .site-header .site-nav > .nav-product > .nav-product-trigger:hover::after,
  .site-header .site-nav > .nav-product > .nav-product-trigger[aria-current="page"]::after { right: 0; }
  .product-quick-menu { width: 220px; padding: 8px; position: absolute; z-index: 4; top: calc(100% + 22px); left: 50%; display: grid; gap: 2px; opacity: 0; pointer-events: none; transform: translate(-50%, -8px); color: var(--color-ink); background: rgba(255,255,255,.98); border: 1px solid rgba(7,28,25,.13); box-shadow: 0 18px 36px rgba(7,28,25,.16); transition: opacity var(--dur-short), transform var(--dur-short); }
  .product-quick-menu::before { content: ""; width: 11px; height: 11px; position: absolute; top: -6px; left: 50%; background: #fff; border-top: 1px solid rgba(7,28,25,.13); border-left: 1px solid rgba(7,28,25,.13); transform: translateX(-50%) rotate(45deg); }
  .site-nav .product-quick-menu a { padding: 11px 13px; position: relative; z-index: 1; color: #31463e; font-size: 12px; font-weight: 700; line-height: 1.45; white-space: normal; text-decoration: none; }
  .site-nav .product-quick-menu a::after { display: none; }
  .site-nav .product-quick-menu a:hover, .site-nav .product-quick-menu a:focus-visible { color: var(--forest, var(--color-accent)); background: #edf4ea; }
  .nav-product:hover .product-quick-menu, .nav-product:focus-within .product-quick-menu { opacity: 1; pointer-events: auto; transform: translate(-50%, 0); }
}

.site-header .site-nav > a.language-switch { display: block; text-decoration: none; white-space: nowrap; }
@media (max-width: 820px) { .site-header .site-nav > a.language-switch { font-weight: 800; letter-spacing: .06em; } }
@media (max-width: 820px) { .product-quick-menu { display: none; } }