/* ============================================================
   瘚桀�訫�湔� + ��鮋���厰�� Floating Nav
   靘�皞� style.css 銵� 3901-3994嚗��娍𨯬蝘鳴���批捆�𧊋�㺿嚗�
   ============================================================ */

/* ============================================================
   FLOATING NAV + BACK TO TOP
   ============================================================ */
/* 頠屸�橒�惨bsolute ��𣂼�𡁏䲰 hero 銋见��� body 摨𤏪���折�� .floating-nav 隞� sticky �銁甇斤���漤�誯����凒蝵桐葉 */
/* top ��� 100vh ��� 1500px嚗�.hero min-height嚗㕑�憭扯��嚗屸�踹�滢�舘�𣇉�烾�睃漲�� sticky ��鞉𡟺�枂�𣶹�䲰 hero �� */
.floating-nav-rail {
  position: absolute;
  left: 0;
  top: max(100vh, 1500px);
  bottom: 0;
  width: 0;
  pointer-events: none;
  z-index: 80;
}

.floating-nav {
  position: sticky;
  top: 50%;
  transform: translateY(-50%);
  width: 86px;
  background: rgba(255, 255, 255, .55);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border-radius: 0 32px 32px 0;
  padding: 14px 0;
  display: flex;
  flex-direction: column;
  box-shadow: 4px 4px 20px rgba(0, 0, 0, .08);
  border: 1px solid rgba(255, 255, 255, .8);
  border-left: 0;
  /* ��鞱身�黸��𧶏�𡁏遝����𨀣䲰��憛𦠜�滨眏 JS ��牐�� .is-visible 憿舐內嚗諹��舘�舐窗��憛𠰴�漤黸��� */
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  /* 瘛望滓����� + 憿舐內/�黸��誩像皛煾�擧腹嚗���蜓�詨鱓銝��稲嚗� */
  transition: background .3s ease, border-color .3s ease, box-shadow .3s ease, opacity .3s ease, visibility .3s ease;
}

/* RWD嚗��� 4011-4013嚗�*/
@media (max-width: 1599px) {
  .floating-nav {
    display: none !important;
  }
}

/* �脣�仿�𨀣䲰嚚噼�舐窗��憛羓���齿�憿舐內 */
.floating-nav.is-visible {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
}

.floating-nav a {
  font-family: var(--f-body);
  font-weight: 500;
  font-size: var(--fs-xs);
  color: rgba(34, 34, 34, .45);
  letter-spacing: .5px;
  text-align: center;
  line-height: 1.3;
  padding: 18px 10px;
  border-bottom: 1px solid rgba(0, 0, 0, .06);
  transition: color .25s, transform .25s, border-color .3s ease;
}

.floating-nav a:last-child {
  border-bottom: 0;
}

.floating-nav a:hover {
  color: var(--c-brand);
}

.floating-nav a.is-active {
  color: var(--c-text);
  font-weight: 700;
}

/* ============================================================
   瘛梯𠧧��憛𡃏�𢠃�䈑����蜓�詨鱓��屸�讛摩嚗�
   �湔�銝剖�雿齿䲰 data-header-mode="dark" ��憛𦠜�嚗𣬚眏 JS init_floating_nav ��牐�� .is-dark
   瘛箄𠧧��憛� �� �蒾摨閖�穃�梹���鞱身嚗㚁�𥟇楛�𠧧��憛� �� 暺穃�閧蒾摮�
   ============================================================ */
.floating-nav.is-dark {
  background: rgba(60, 60, 60, .45);
  border-color: rgba(255, 255, 255, .18);
  box-shadow: 4px 4px 20px rgba(0, 0, 0, .25);
}

.floating-nav.is-dark a {
  color: rgba(255, 255, 255, .55);
  border-bottom-color: rgba(255, 255, 255, .12);
}

.floating-nav.is-dark a:hover {
  color: var(--c-brand);
}

.floating-nav.is-dark a.is-active {
  color: var(--c-on-dark);
}

.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  z-index: 80;
  width: 56px;
  height: 56px;
  border-radius: var(--r-full);
  color: var(--c-on-dark);
  font-family: var(--f-display);
  font-weight: 700;
  font-size: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--sh-cta);
  opacity: 0;
  pointer-events: none;
  transform: translateY(12px);
  transition: opacity .3s, transform .3s;
  letter-spacing: 1px;
}

.back-to-top.show {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--c-brand-hover);
  color: var(--c-on-dark);
}

#backToTop {
  cursor: pointer;
}

#backToTop:hover {
  opacity: 0.7;
}