/* Shared by every public page. Each navigation group is its own thin glass capsule. */
:root {
  --nav-surface: #fffcf5;
  --nav-ink: #2d2927;
  --nav-accent: #006443;
  --nav-glass-fill: rgba(255, 252, 245, 0.72);
  --nav-glass-line: rgba(45, 41, 39, 0.16);
}

@media (prefers-color-scheme: dark) {
  :root {
    --nav-surface: #1b251e;
    --nav-ink: #eef4f0;
    --nav-accent: #79dca7;
    --nav-glass-fill: rgba(16, 47, 34, 0.72);
    --nav-glass-line: rgba(238, 244, 240, 0.28);
  }
}

/* The fixed glass capsules float over the hero; no full-width header strip is reserved. */
body {
  padding-top: 0;
}

.site-header,
.site-header[data-elevated="true"] {
  background: transparent;
  border: 0;
  box-shadow: none;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.site-header :is(.brand, .desktop-nav, .mobile-nav, .language-switcher, .mobile-language) {
  --control-ink: #2d2927;
  --pine: #006443;
  --glass-fill: var(--nav-glass-fill);
  --glass-line: var(--nav-glass-line);
  --glass-hover: rgba(0, 100, 67, 0.08);
  --selected-fill: #006443;
  --selected-ink: #fff;
  color: var(--control-ink);
  background: var(--glass-fill);
  border: 1px solid var(--glass-line);
  border-radius: 999px;
  box-shadow: none;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header .brand {
  position: relative;
  isolation: isolate;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: max-content;
  padding: 6px 12px;
}

.site-header .brand img {
  content: url("public/brand/01_Logo/PNG/全色小logo.webp");
  filter: none;
}

@media (prefers-color-scheme: dark) {
  .site-header :is(.brand, .desktop-nav, .mobile-nav, .language-switcher, .mobile-language) {
    --control-ink: #f7fff9;
    --pine: #79dca7;
    --glass-fill: var(--nav-glass-fill);
    --glass-line: var(--nav-glass-line);
    --glass-hover: rgba(238, 244, 240, 0.12);
    --selected-fill: #79dca7;
    --selected-ink: #102519;
  }

  .site-header .brand img {
    content: url("public/brand/01_Logo/PNG/白小logo.webp");
  }
}

.site-header .desktop-nav {
  position: relative;
  isolation: isolate;
  justify-self: center;
  gap: 2px;
  width: max-content;
  min-height: 56px;
  padding: 6px;
}

/* Keep the glass on a separate layer so descendant menus can blur the page. */
.site-header :is(.desktop-nav, .mobile-nav) {
  background: transparent;
  -webkit-backdrop-filter: none;
  backdrop-filter: none;
}

.site-header :is(.desktop-nav, .mobile-nav)::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  border-radius: inherit;
  background: var(--glass-fill);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  pointer-events: none;
}

.site-header .desktop-nav > a,
.site-header .desktop-nav .nav-main-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--control-ink);
  text-shadow: none;
}

.site-header .desktop-nav > a::after,
.site-header .desktop-nav .nav-main-link::before,
.site-header .nav-hover-indicator {
  display: none;
}

.site-header .desktop-nav > a[aria-current="page"],
.site-header .desktop-nav .nav-main-link[aria-current="page"] {
  background: var(--selected-fill);
  color: var(--selected-ink);
}

.site-header .desktop-nav > a:not([aria-current="page"]):hover,
.site-header .desktop-nav > a:not([aria-current="page"]):focus-visible,
.site-header .desktop-nav .nav-main-link:not([aria-current="page"]):hover,
.site-header .desktop-nav .nav-main-link:not([aria-current="page"]):focus-visible {
  background: var(--glass-hover);
  color: var(--control-ink);
}

.site-header .nav-dropdown {
  min-height: 42px;
  margin: 0;
  padding: 0;
}

.site-header .nav-dropdown-menu {
  top: calc(100% + 14px);
  border-radius: 22px;
  visibility: hidden;
  opacity: 0;
  clip-path: inset(0 0 100% 0 round 22px);
  transform: translate(-50%, 0);
  transition: clip-path 200ms cubic-bezier(.22, 1, .36, 1),
    opacity 140ms ease-out, visibility 0s linear 200ms;
}

.site-header .nav-dropdown:is(:hover, :focus-within, .is-open) .nav-dropdown-menu {
  visibility: visible;
  opacity: 1;
  clip-path: inset(0 0 0 0 round 22px);
  transform: translate(-50%, 0);
  transition-duration: 340ms, 160ms, 0s;
  transition-delay: 0s;
}

.site-header .nav-dropdown::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 0;
  width: 100%;
  height: 14px;
}

.site-header .nav-dropdown-menu::before {
  content: "";
  position: absolute;
  right: 0;
  bottom: 100%;
  left: 0;
  height: 14px;
}

.site-header :is(.nav-dropdown-menu, .mobile-project-menu, .mobile-project-menu::before) {
  --pine: var(--nav-accent);
  --smoke: var(--nav-ink);
  color: var(--nav-ink);
  border-color: var(--glass-line);
  text-shadow: none;
}

.site-header :is(.nav-dropdown-menu, .mobile-project-menu) {
  background: var(--glass-fill);
  box-shadow: none;
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header .mobile-project-menu {
  border-radius: 22px;
}

.site-header .mobile-project-menu::before {
  background: var(--glass-fill);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}

.site-header :is(.nav-dropdown-menu a, .mobile-project-menu-head, .mobile-project-option) {
  color: var(--nav-ink);
  text-shadow: none;
}

/* Keep the item curve concentric with the 22px menu: 10px padding + 1px border. */
.site-header .nav-dropdown-menu a {
  border-radius: calc(22px - 10px - 1px);
}

.site-header :is(.nav-dropdown-menu a, .mobile-project-option):hover {
  background: rgba(86, 141, 118, 0.15);
}

.site-header .language-switcher {
  gap: 2px;
  padding: 6px;
}

.site-header .lang-button {
  flex: 0 0 42px;
  width: 42px;
  min-width: 42px;
  height: 42px;
  padding: 0;
  border-radius: 50%;
  color: var(--control-ink);
  text-shadow: none;
}

.site-header .lang-button.is-active {
  background: var(--selected-fill);
  color: var(--selected-ink);
  box-shadow: none;
}

.site-header .lang-button:not(.is-active):hover {
  background: var(--glass-hover);
}

.site-header :is(a, button):focus-visible {
  outline: 2px solid var(--nav-accent);
  outline-offset: 2px;
}

@media (max-width: 1080px) {
  /* Join both rows with one glass layer; keep the original corner arcs and control geometry. */
  .site-header::before {
    content: "";
    position: absolute;
    z-index: -1;
    left: var(--mobile-glass-left, 16px);
    top: var(--mobile-glass-top, 9px);
    width: var(--mobile-glass-width, calc(100% - 32px));
    height: var(--mobile-glass-height, calc(100% - 16px));
    border: 1px solid var(--nav-glass-line);
    border-radius: var(--mobile-glass-top-radius, 24px) var(--mobile-glass-top-radius, 24px)
      var(--mobile-glass-bottom-radius, 23px) var(--mobile-glass-bottom-radius, 23px);
    background: var(--nav-glass-fill);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    pointer-events: none;
    box-sizing: border-box;
  }

  .site-header :is(.brand, .language-switcher) {
    border-color: transparent;
    background: transparent;
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }

  .site-header .mobile-nav {
    border-color: transparent;
  }

  .site-header .mobile-nav::before {
    content: none;
  }

  .site-header .mobile-project-trigger-chevron {
    flex: 0 0 12px;
    display: block;
    width: 12px;
    height: 12px;
    border: 0;
    background: currentColor;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.25 6 7.75 9.5 4.25' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 12 12'%3E%3Cpath d='M2.5 4.25 6 7.75 9.5 4.25' fill='none' stroke='black' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center / contain no-repeat;
    transform: rotate(0deg);
  }

  .site-header .mobile-project-trigger[aria-expanded="true"] .mobile-project-trigger-chevron {
    transform: rotate(180deg);
  }

  /* The hero artwork reaches the top; only its foreground clears the two-row nav. */
  body:not(.moon-garden-page) main > section:first-child {
    padding-top: calc(var(--site-header-height) + 40px);
  }

  /* Preserve the same glass alpha while making the open menu readable over hero copy. */
  body:has(.mobile-nav.has-open-project-menu) main {
    opacity: 0.45;
    filter: blur(6px);
  }

  .site-header .mobile-nav {
    position: relative;
    isolation: isolate;
    gap: 2px;
    width: 100%;
    max-width: 100%;
    min-height: 46px;
    padding: 6px;
  }

  .site-header .mobile-nav > a,
  .site-header .mobile-project-trigger {
    flex: 1 1 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 32px;
    padding: 0 10px;
    border-radius: 999px;
    color: var(--control-ink);
    text-shadow: none;
  }

  .site-header .mobile-project-menu {
    max-height: min(460px, calc(100svh - var(--site-header-height) - 32px));
    margin-top: 8px;
    visibility: hidden;
    clip-path: inset(0 0 100% 0 round 22px);
    overflow-y: auto;
    transform: translateY(-6px);
    transition: clip-path 200ms cubic-bezier(.22, 1, .36, 1),
      opacity 140ms ease-out, transform 200ms cubic-bezier(.22, 1, .36, 1),
      visibility 0s linear 200ms;
  }

  .site-header .mobile-nav.has-open-project-menu .mobile-project-menu {
    max-height: min(460px, calc(100svh - var(--site-header-height) - 32px));
    margin-top: 8px;
    visibility: visible;
    clip-path: inset(0 0 0 0 round 22px);
    transform: translateY(0);
    transition-duration: 280ms, 160ms, 280ms, 0s;
    transition-delay: 0s;
  }

  .site-header .mobile-nav > a::after,
  .site-header .mobile-project-trigger::after {
    display: none;
  }

  .site-header .mobile-nav > a[aria-current="page"],
  .site-header .mobile-project-trigger[aria-current="page"] {
    background: var(--selected-fill);
    color: var(--selected-ink);
  }

  .site-header .mobile-nav > a:not([aria-current="page"]):hover,
  .site-header .mobile-project-trigger:not([aria-current="page"]):hover {
    background: var(--glass-hover);
    color: var(--control-ink);
  }
}

@media (prefers-reduced-motion: reduce) {
  .site-header .mobile-project-menu,
  .site-header .mobile-nav.has-open-project-menu .mobile-project-menu {
    clip-path: none;
    transform: none;
    transition: opacity 100ms ease-out, visibility 0s linear;
  }

  .site-header .nav-dropdown-menu,
  .site-header .nav-dropdown:is(:hover, :focus-within, .is-open) .nav-dropdown-menu {
    clip-path: none;
    transition: opacity 100ms ease-out, visibility 0s linear;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header::before,
  .site-header :is(.desktop-nav, .mobile-nav)::before,
  .site-header :is(.nav-dropdown-menu, .mobile-project-menu) {
    background: var(--nav-surface);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}

@media (max-width: 680px) {
  .site-header {
    column-gap: 6px;
  }

  .site-header .brand {
    padding: 6px 8px;
  }

  .site-header .language-switcher {
    gap: 2px;
    padding: 6px;
  }

  .site-header .lang-button {
    flex-basis: 32px;
    width: 32px;
    min-width: 32px;
    height: 32px;
  }

  .site-header .mobile-nav {
    column-gap: 2px;
    row-gap: 2px;
  }

  .site-header .mobile-nav > a,
  .site-header .mobile-project-trigger {
    min-height: 32px;
    padding: 0 8px;
    font-size: 13px;
  }

  .site-header .mobile-project-option > [data-i18n] {
    padding: 8px 8px 8px 0;
    overflow-wrap: anywhere;
    white-space: normal;
  }

  .site-header .mobile-nav.is-open .mobile-language {
    gap: 2px;
    padding: 6px;
  }
}

@media (max-width: 340px) {
  .site-header .mobile-nav > a,
  .site-header .mobile-project-trigger {
    padding-inline: 6px;
  }
}

@media (prefers-reduced-transparency: reduce) {
  .site-header :is(.nav-dropdown-menu, .mobile-project-menu, .mobile-project-menu::before) {
    background: var(--nav-surface);
    -webkit-backdrop-filter: none;
    backdrop-filter: none;
  }
}