/* 独立边框颜色变量：每一个都可以单独调整，互不影响 */
:root {
  --header-border-color: rgba(221, 218, 211, 0.72);
  /* 顶部 header 底部的线 */
  --nav-dropdown-border-color: #dddad3;
  /* 桌面端「商品」下拉菜单的边框 */
  --mobile-menu-border-color: #dddad3;
  /* 手机端弹出菜单里的分隔线（顶部区块、导航链接、下拉子项） */
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  height: 106px;
  border-bottom: 1px solid var(--header-border-color);
  background: #fbfaf8;
}

.site-header__inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto minmax(0, 1fr);
  column-gap: clamp(28px, 3.4vw, 56px);
  align-items: center;
  width: min(calc(100% - 154px), 1248px);
  height: 100%;
  margin-inline: auto;
}

.brand {
  display: inline-flex;
  min-width: 190px;
  align-items: center;
  justify-content: center;
  min-height: 92px;
  text-align: center;
}

.brand__lockup {
  width: auto;
  height: 45px;
  max-width: 200px;
  object-fit: contain;
}

.desktop-nav {
  display: flex;
  align-items: center;
  gap: clamp(34px, 3.8vw, 66px);
  color: #282725;
  font-family: var(--serif);
  font-size: 15px;
  font-weight: 400;
  letter-spacing: 0.035em;
  white-space: nowrap;
}

.desktop-nav--left {
  justify-content: flex-end;
}

.desktop-nav--right {
  justify-content: flex-start;
  gap: clamp(20px, 2vw, 40px);
}

.language-switcher {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.language-switcher a {
  position: relative;
  display: inline-flex;
  min-width: 30px;
  min-height: 32px;
  align-items: center;
  justify-content: center;
  color: var(--muted);
  font-family: var(--sans);
  font-size: 12px;
  letter-spacing: 0.1em;
  line-height: 1;
}

.language-switcher a.is-current,
.language-switcher a[aria-current="true"] {
  color: var(--ink);
}

.language-switcher a.is-current::after,
.language-switcher a[aria-current="true"]::after {
  position: absolute;
  right: 3px;
  bottom: 2px;
  left: 3px;
  height: 1px;
  background: var(--aqua-dark);
  content: "";
}

.language-switcher a:focus-visible {
  outline: 2px solid var(--aqua-dark);
  outline-offset: 2px;
}

/* Header navigation underline: kept close to the label. */
.desktop-nav>a {
  position: relative;
  line-height: 1;
}

.desktop-nav>a::after {
  position: absolute;
  right: 0;
  bottom: -4px;
  left: 0;
  height: 1px;
  background: var(--aqua-dark);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.desktop-nav>a:hover::after,
.desktop-nav>a:focus-visible::after,
.desktop-nav>a[aria-current="page"]::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown__trigger {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: 7px;
  border: 0;
  background: none;
  padding: 0;
  color: inherit;
  font: inherit;
  letter-spacing: inherit;
  cursor: pointer;
}

.nav-dropdown__trigger::after {
  position: absolute;
  right: 0;
  bottom: -4px;
  left: 0;
  height: 1px;
  background: var(--aqua-dark);
  content: "";
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.nav-dropdown__trigger:hover::after,
.nav-dropdown__trigger:focus-visible::after,
.nav-dropdown--active .nav-dropdown__trigger::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-dropdown__caret {
  width: 8px;
  height: 8px;
  color: var(--muted);
  transition: transform 180ms ease;
}

.nav-dropdown.is-open .nav-dropdown__caret {
  transform: rotate(180deg);
}

.desktop-nav .nav-dropdown__panel {
  position: absolute;
  top: calc(100% + 22px);
  left: 50%;
  min-width: 168px;
  padding: 8px 0;
  border: 1px solid var(--nav-dropdown-border-color);
  border-radius: 4px;
  background: var(--white);
  box-shadow: 0 18px 34px rgba(16, 37, 54, 0.14);
  opacity: 0;
  transform: translate(-50%, 6px);
  visibility: hidden;
  transition: opacity 160ms ease, transform 160ms ease, visibility 160ms;
}

.desktop-nav .nav-dropdown.is-open .nav-dropdown__panel {
  opacity: 1;
  transform: translate(-50%, 0);
  visibility: visible;
}

@media (hover: hover) {
  .desktop-nav .nav-dropdown:hover .nav-dropdown__panel {
    opacity: 1;
    transform: translate(-50%, 0);
    visibility: visible;
  }
}

.desktop-nav .nav-dropdown__panel a {
  display: block;
  padding: 11px 22px;
  white-space: nowrap;
  font-size: 14px;
}

.desktop-nav .nav-dropdown__panel a::after {
  display: none;
}

.desktop-nav .nav-dropdown__panel a:hover,
.desktop-nav .nav-dropdown__panel a:focus-visible {
  background: var(--aqua-tint);
}

.mobile-menu .nav-dropdown__trigger {
  display: flex;
  width: 100%;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid var(--mobile-menu-border-color);
  font-family: var(--serif);
  font-size: 17px;
}

.mobile-menu .nav-dropdown__trigger::after {
  display: none;
}

.mobile-menu .nav-dropdown--active .nav-dropdown__trigger {
  color: var(--aqua-dark);
}

.mobile-menu .nav-dropdown__panel {
  display: none;
  flex-direction: column;
  padding-left: 18px;
}

.mobile-menu .nav-dropdown.is-open .nav-dropdown__panel {
  display: flex;
}

.mobile-menu .nav-dropdown__panel a {
  display: flex;
  min-height: 48px;
  align-items: center;
  border-bottom: 1px solid var(--mobile-menu-border-color);
  font-family: var(--sans);
  font-size: 14px;
  color: var(--muted);
}

.menu-trigger {
  display: none;
  min-width: 48px;
  min-height: 44px;
  border: none;
  background: transparent;
  color: var(--ink);
  font-size: 13px;
  letter-spacing: 0.12em;
}

/* 汉堡菜单图标：以后想调整大小/粗细，只需要改这两个数值即可 ↓↓↓ */
.menu-trigger__icon {
  width: 28px;
  /* 图标整体大小（越大越宽） */
  height: 20px;
  /* 图标整体大小（越大越高，建议和上面的宽度保持比例） */
  overflow: visible;
}

.menu-trigger__icon line {
  stroke: currentColor;
  stroke-width: 2;
  /* 线条粗细，数字越大越粗，建议在 1.5～3 之间调整 */
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  /* 保证改上面的“整体大小”时，线条粗细不会跟着变粗/变细 */
}

/* 汉堡菜单图标设置结束 ↑↑↑ */

.mobile-menu {
  position: fixed;
  z-index: 80;
  inset: 0;
  display: flex;
  justify-content: flex-end;
  background: rgba(16, 37, 54, 0.52);
}

.mobile-menu__panel {
  width: min(88vw, 420px);
  height: 100%;
  padding: 20px 24px 32px;
  overflow-y: auto;
  overscroll-behavior: contain;
  background: var(--ivory);
}

.mobile-menu__top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--mobile-menu-border-color);
}

.mobile-menu__top .brand {
  align-items: flex-start;
  min-width: 0;
  text-align: left;
}

.menu-close {
  min-width: 64px;
  min-height: 44px;
  border: 1px solid #f6f3ed;
  border-radius: 2px;
  background: transparent;
}

.mobile-menu nav {
  display: grid;
  margin-top: 24px;
}

.mobile-menu nav a {
  display: flex;
  align-items: center;
  min-height: 58px;
  border-bottom: 1px solid var(--mobile-menu-border-color);
  font-family: var(--serif);
  font-size: 17px;
}


.language-switcher--mobile {
  margin-top: 28px;
  justify-content: flex-start;
}

.site-footer {
  padding-block: 60px 30px;
  background: var(--aqua);
  color: var(--white);
}

.site-footer__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 44px;
}

.site-footer__inner>div {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.site-footer strong {
  font-family: var(--serif);
  font-size: 22px;
  font-weight: 400;
}

.site-footer__inner>div span,
.site-footer small {
  color: rgba(255, 255, 255, 0.82);
  font-size: 11px;
  letter-spacing: 0.15em;
}

.site-footer nav {
  display: flex;
  gap: 28px;
  font-size: 13px;
}

.site-footer small {
  grid-column: 1 / -1;
}

.site-footer__language {
  align-items: flex-start;
  grid-column: 1 / -1;
}

/* Footer links use their own, tighter underline offset. */
.site-footer nav a {
  position: relative;
  line-height: 1.25;
}

.site-footer nav a::after {
  position: absolute;
  right: 0;
  bottom: 60px;
  left: 0;
  height: 1px;
  background: currentColor;
  content: "";
  opacity: 0.82;
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.site-footer nav a:hover::after,
.site-footer nav a:focus-visible::after {
  transform: scaleX(1);
  transform-origin: left;
}

.language-switcher--footer a {
  color: rgba(255, 255, 255, 0.78);
}

.language-switcher--footer a.is-current,
.language-switcher--footer a[aria-current="true"] {
  color: var(--white);
}

.language-switcher--footer a.is-current::after,
.language-switcher--footer a[aria-current="true"]::after {
  background: var(--white);
}

@media (max-width: 1020px) {
  .site-header__inner {
    grid-template-columns: 1fr auto;
  }

  .site-header .brand {
    grid-column: 1;
    text-align: left;
  }

  .desktop-nav {
    display: none;
  }

  .language-switcher--desktop {
    display: none;
  }

  .menu-trigger {
    display: inline-flex;
    grid-column: 2;
    align-items: center;
    justify-content: center;
  }
}

@media (max-width: 767px) {
  .site-header__inner {
    position: relative;
    width: min(calc(100% - 40px), var(--content));
  }

  .site-header {
    height: 64px;
  }

  .brand {
    min-width: 0;
    min-height: 44px;
  }

  /* Logo left-aligned on mobile. */
  .site-header__inner>.brand {
    grid-column: 1;
    align-items: center;
    justify-content: flex-start;
    text-align: left;
  }

  .brand__lockup {
    width: auto;
    max-width: 128px;
  }

  .menu-trigger {
    position: relative;
    z-index: 2;
    justify-self: end;
  }

  .site-footer__inner {
    grid-template-columns: 1fr;
  }

  .site-footer nav {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 18px 16px;
  }

  .site-footer small {
    grid-column: 1;
  }
}

/* Japanese content revision: accommodate the expanded legal/company footer. */
html[lang="ja"] .site-footer nav {
  flex-wrap: wrap;
  justify-content: flex-end;
  max-width: 760px;
}

html[lang="ja"] .site-footer__brand span {
  letter-spacing: 0.05em !important;
  line-height: 1.7;
}

@media (max-width: 767px) {
  html[lang="ja"] .site-footer nav {
    grid-template-columns: 1fr;
    justify-content: flex-start;
    max-width: none;
  }

  .menu-close {
    font-size: 15px;
  }
}


/* Back-to-top control (shared across all languages and pages). */
.back-to-top {
  position: fixed;
  z-index: 70;
  right: max(22px, env(safe-area-inset-right));
  bottom: max(22px, env(safe-area-inset-bottom));
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  border: 1px solid rgba(255, 255, 255, 0.42);
  border-radius: 50%;
  background: rgba(16, 37, 54, 0.92);
  box-shadow: 0 12px 30px rgba(16, 37, 54, 0.22);
  color: #fff;
  font-family: var(--sans);
  font-size: 24px;
  line-height: 1;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity 180ms ease, transform 180ms ease, background 180ms ease;
  cursor: pointer;
}

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

.back-to-top:hover {
  background: var(--aqua-dark);
}

.back-to-top:focus-visible {
  outline: 3px solid rgba(61, 169, 194, 0.42);
  outline-offset: 4px;
}

@media (max-width: 767px) {
  .back-to-top {
    width: 46px;
    height: 46px;
    right: 16px;
    bottom: 16px;
    font-size: 21px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top {
    transition: none;
  }
}