:root {
  --header-h: 94px;
  --menu-bg: #0b1630;
  --menu-fg: rgba(255, 255, 255, 0.92);
  --menu-muted: rgba(255, 255, 255, 0.72);
  --rule: rgba(255, 255, 255, 0.18);
}

.site-header {
  color: #fff;
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  background: rgba(0, 0, 0, 0);
  transition:
    background-color 0.2s ease,
    border-color 0.2s ease;
}

.site-header.is-scrolled {
  background: none;
  backdrop-filter: blur(1px);
  -webkit-backdrop-filter: blur(1px);
  border-bottom: none;
}

.site-header__inner {
  width: min(1600px, calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
}

.brand {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  gap: 0;
  min-width: 0;
  flex: 0 0 auto;
  height: auto;
  transform: translateY(40px);
}

.brand__icon {
  width: 170px;
  height: auto;
  display: block;
  transform: translateY(10px);
}

.brand__text {
  height: 26px;
  width: auto;
  margin-top: -12px;
  display: block;
  transform: translateY(0);
  transition:
    opacity 0.25s ease,
    transform 0.25s ease;
}

.site-header.is-scrolled .brand__icon,
.site-header.is-scrolled .brand__text {
  opacity: 0;
  transform: translateY(8px);
  pointer-events: none;
}

.brand__mark {
  width: 170px;
  height: auto;
  display: block;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}

.header-tel {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: rgba(255, 255, 255, 0.92);
  font-size: 16px;
  letter-spacing: 0.02em;
  background: transparent;
  backdrop-filter: none;
  -webkit-backdrop-filter: none;
  padding: 0;
}

.header-tel__icon {
  width: 50px;
  height: 50px;
  border-radius: 999px;
  display: grid;
  place-items: center;
  background: #fff;
  flex-shrink: 0;
}

.header-tel__icon img {
  width: 32px;
  height: 32px;
  display: block;
}

.header-tel__num {
  font-family: var(
    --mono,
    ui-monospace,
    Menlo,
    Monaco,
    Consolas,
    "Liberation Mono",
    monospace
  );
  font-size: 30px;
  font-weight: 500;
  letter-spacing: 0.02em;
}

.header-contact {
  height: 44px;
  padding: 0 18px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  text-decoration: none;
  border-radius: 3px;
  color: rgba(255, 255, 255, 0.92);
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: transparent;
  font-size: 20px;
  font-weight: 500;
  letter-spacing: 0.08em;
  transition: all 0.25s ease;
}

.header-contact:hover {
  background: rgba(255, 255, 255, 0.205);
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
}

.hamburger {
  width: 54px;
  height: 44px;
  border-radius: 3px;
  border: 1px solid rgba(255, 255, 255, 0.9);
  background: transparent;
  cursor: pointer;
  position: relative;
  display: grid;
  place-items: center;
}

.hamburger__lines {
  width: 20px;
  height: 14px;
  position: relative;
  display: block;
}

.hamburger__lines::before,
.hamburger__lines::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  height: 2px;
  border-radius: 0;
  background: rgba(255, 255, 255, 0.95);
  transition:
    transform 0.18s ease,
    top 0.18s ease,
    opacity 0.18s ease;
}

.hamburger__lines::before {
  top: 2px;
}

.hamburger__lines::after {
  top: 10px;
}

.site-header.is-scrolled .header-tel,
.site-header.is-scrolled .header-contact {
  color: rgba(0, 0, 0, 0.8);
}

.site-header.is-scrolled .hamburger__lines::before,
.site-header.is-scrolled .hamburger__lines::after {
  background: rgba(0, 0, 0, 0.8);
}

.site-header.is-scrolled .header-contact,
.site-header.is-scrolled .hamburger {
  border-color: rgba(0, 0, 0, 0.6);
}

html.is-menu-open .hamburger__lines::before {
  top: 6px;
  transform: rotate(45deg);
}

html.is-menu-open .hamburger__lines::after {
  top: 6px;
  transform: rotate(-45deg);
}

.menu-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.45);
  z-index: 1200;
}

.global-menu {
  position: fixed;
  top: 0;
  right: 0;
  height: 100dvh;
  width: min(50vw, 760px);
  background: var(--menu-bg);
  color: var(--menu-fg);
  z-index: 1300;
  overflow: auto;
  transform: translateX(100%);
  transition: transform 0.28s ease;
  box-shadow: -20px 0 60px rgba(0, 0, 0, 0.35);
}

html.is-menu-open .global-menu {
  transform: translateX(0);
}

.global-menu__inner {
  width: calc(100% - 96px);
  margin: 0 auto;
  padding: 42px 0 34px;
}

.global-menu__head {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  margin-bottom: 18px;
}

.menu-close {
  width: 44px;
  height: 44px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
  color: var(--menu-fg);
  cursor: pointer;
  font-size: 26px;
  line-height: 1;
}

.menu-group {
  display: grid;
  grid-template-columns: 220px 1fr 1fr;
  column-gap: 26px;
  padding: 26px 0;
  align-items: start;
}

.menu-group + .menu-group {
  border-top: none;
}

.menu-group__left {
  font-size: 18px;
  letter-spacing: 0.22em;
  font-weight: 600;
  white-space: nowrap;
  opacity: 0.95;
  padding-top: 2px;
  line-height: 1.2;
}

.menu-group__rule {
  height: 1px;
  background: rgba(255, 255, 255, 0.22);
  align-self: start;
  margin-top: 12px;
}

.menu-group__right {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 18px;
  align-content: start;
}

.menu-group__right a {
  color: rgba(255, 255, 255, 0.72);
  text-decoration: none;
  font-size: 16px;
  letter-spacing: 0.06em;
}

.menu-group__right a:hover {
  color: rgba(255, 255, 255, 0.92);
}

.menu-group__right--grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 18px;
  align-items: start;
}

.menu-group a {
  color: var(--menu-muted);
  text-decoration: none;
  font-size: 16px;
  letter-spacing: 0.06em;
}

.menu-group a:hover {
  color: var(--menu-fg);
}

.menu-footer {
  margin-top: 34px;
  padding-top: 24px;
}

.menu-sns {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  margin: 28px 0 15px;
}

.menu-sns a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  perspective: 800px;
}

.menu-sns img {
  display: block;
  height: 34px;
  width: auto;
  transform-style: preserve-3d;
  backface-visibility: visible;
}

.menu-sns a:hover img {
  animation: snsFlip 0.8s linear infinite;
}

.menu-sns__link {
  color: rgba(255, 255, 255, 0.92);
  text-decoration: none;
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: 999px;
  padding: 10px 14px;
  font-size: 14px;
  letter-spacing: 0.06em;
}

.menu-sns a:nth-child(3) img {
  height: 45px;
}

.menu-copy {
  margin: 0;
  text-align: center;
  color: rgba(255, 255, 255, 0.55);
  font-size: 12px;
  letter-spacing: 0.16em;
}

body.is-menu-open {
  position: fixed;
  left: 0;
  right: 0;
  width: 100%;
}

.site-header.is-dark .header-tel,
.site-header.is-dark .header-contact {
  color: #000;
}

.site-header.is-dark .hamburger__lines::before,
.site-header.is-dark .hamburger__lines::after {
  background: #000;
}

.site-header.is-light .header-tel,
.site-header.is-light .header-contact {
  color: #fff;
}

.site-header.is-light .hamburger__lines::before,
.site-header.is-light .hamburger__lines::after {
  background: #fff;
}

.site-header.is-dark .header-contact,
.site-header.is-dark .hamburger {
  border-color: rgba(0, 0, 0, 0.7);
  background: rgba(255, 255, 255, 0);
}

.site-header.is-dark .header-tel {
  border-color: rgba(0, 0, 0, 0.7);
}

.site-header.is-dark .header-tel__icon {
  background: #000;
}

.site-header.is-dark .header-tel__icon img {
  filter: brightness(0) invert(1);
}

.site-header.is-light .header-contact,
.site-header.is-light .hamburger {
  border-color: rgba(255, 255, 255, 0.85);
}

.header-tel__label,
.header-mail,
.hamburger__label {
  display: none;
}

@media (max-width: 767px) {
  .site-header {
    width: 100%;
    height: auto;
    min-height: 80px;
    padding-top: max(8px, env(safe-area-inset-top));
    overflow-x: hidden;
    overflow-y: visible;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: none;
    transition:
      background-color 0.25s ease,
      backdrop-filter 0.25s ease,
      border-color 0.25s ease,
      min-height 0.25s ease;
  }

  .site-header.is-scrolled {
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: 72px;
  }

  .site-header__inner {
    width: calc(100% - 24px);
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 8px;
    min-width: 0;
    padding-top: 4px;
  }

  .brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    min-width: 0;
    flex: 0 0 auto;
    height: auto;
    transform: translateY(-8px);
  }

  .brand__mark {
    width: auto;
  }

  .brand__label {
    display: block;
  }

  .brand__icon {
    width: 70px;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    transition:
      opacity 0.25s ease,
      transform 0.25s ease,
      width 0.25s ease;
  }

  .brand__text {
    display: block;
    height: 11px;
    width: auto;
    margin-top: -7px;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    transition:
      opacity 0.25s ease,
      transform 0.25s ease;
  }

  .site-header.is-scrolled {
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: 64px;
    padding-top: max(4px, env(safe-area-inset-top));
  }

  .site-header.is-scrolled .site-header__inner {
    align-items: center;
    padding-top: 0;
  }

  .site-header.is-scrolled .brand__icon {
    width: 72px;
    opacity: 1;
    transform: translateY(12px);
    pointer-events: auto;
  }

  .site-header.is-scrolled .brand__text {
    display: none;
  }

  .site-header.is-scrolled .brand {
    height: auto;
    min-height: 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
  }

  .header-actions {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    flex: 0 0 auto;
    margin-left: auto;
  }

  .header-contact {
    display: none;
  }

  .header-tel {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    color: #fff;
    min-width: 44px;
  }

  .header-tel__icon {
    width: 40px;
    height: 40px;
    background: #fff;
  }

  .header-tel__icon img {
    width: 24px;
    height: 24px;
    filter: none;
  }

  .header-tel__num {
    display: none;
  }

  .header-contact {
    height: 36px;
    padding: 0 10px;
    font-size: 10px;
    letter-spacing: 0.08em;
  }

  .header-tel__label {
    display: block;
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.04em;
    color: #fff;
    white-space: nowrap;
  }

  .header-mail {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    text-decoration: none;
    color: #fff;
    min-width: 70px;
  }

  .header-mail__icon {
    width: 70px;
    height: 40px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
  }

  .header-mail__icon img {
    width: 70px;
    height: 40px;
    display: block;
    object-fit: contain;
  }

  .header-mail__label {
    display: block;
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.02em;
    color: #fff;
    white-space: nowrap;
  }

  .hamburger {
    width: 40px;
    height: auto;
    min-height: 40px;
    border: none;
    padding: 10px 0 0;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    background: transparent;
  }

  .hamburger__lines {
    width: 34px;
    height: 24px;
    position: relative;
  }

  .hamburger__lines::before,
  .hamburger__lines::after {
    left: 0;
    right: 0;
    width: 34px;
    height: 2px;
    background: #fff;
  }

  .hamburger__lines::before {
    top: 6px;
  }

  .hamburger__lines::after {
    top: 16px;
  }

  html.is-menu-open .hamburger__lines::before {
    top: 11px;
  }

  html.is-menu-open .hamburger__lines::after {
    top: 11px;
  }

  .hamburger__label {
    display: block;
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.04em;
    color: #fff;
    white-space: nowrap;
    padding-top: 7px;
  }

  .global-menu {
    width: 100vw;
  }

  .global-menu__inner {
    width: calc(100% - 48px);
    padding: 24px 0 32px;
  }

  .global-menu__head {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-bottom: 22px;
  }

  .menu-close {
    width: 40px;
    height: 40px;
    border-radius: 2px;
    border: 1px solid rgba(255, 255, 255, 0.45);
    background: transparent;
    color: #fff;
    font-size: 22px;
    line-height: 1;
  }

  .menu-nav {
    display: flex;
    flex-direction: column;
    gap: 0;
  }

  .menu-group {
    display: grid;
    grid-template-columns: 92px 98px 1fr;
    column-gap: 16px;
    align-items: start;
    padding: 20px 0;
  }

  .menu-group__left {
    grid-column: 1;
    font-size: 15px;
    letter-spacing: 0.18em;
    font-weight: 700;
    line-height: 1.2;
    white-space: nowrap;
    padding-top: 2px;
  }

  .menu-group__rule {
    grid-column: 2;
    display: block;
    width: 70%;
    height: 1px;
    background: rgba(255, 255, 255, 0.58);
    margin: 9px auto 0;
  }

  .menu-group__right,
  .menu-group__right--grid {
    grid-column: 3;
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    justify-items: start;
    align-content: start;
  }

  .menu-group__right a,
  .menu-group a {
    display: inline-block;
    font-size: 15px;
    letter-spacing: 0.02em;
    line-height: 1.2;
    text-align: left;
    white-space: nowrap;
  }

  .menu-sns {
    gap: 26px;
    margin: 28px 0 12px;
    justify-content: center;
  }

  .menu-sns img {
    height: 28px;
  }

  .menu-sns a:nth-child(3) img {
    height: 34px;
  }

  .menu-copy {
    font-size: 10px;
    letter-spacing: 0.12em;
    text-align: center;
  }

  .site-header,
  .site-header.is-scrolled,
  .site-header.is-light,
  .site-header.is-dark {
    color: #fff;
  }

  .site-header .header-tel,
  .site-header .header-mail,
  .site-header .header-contact,
  .site-header.is-scrolled .header-tel,
  .site-header.is-scrolled .header-mail,
  .site-header.is-scrolled .header-contact,
  .site-header.is-light .header-tel,
  .site-header.is-light .header-mail,
  .site-header.is-light .header-contact,
  .site-header.is-dark .header-tel,
  .site-header.is-dark .header-mail,
  .site-header.is-dark .header-contact {
    color: #fff;
  }

  .site-header .hamburger__lines::before,
  .site-header .hamburger__lines::after,
  .site-header.is-scrolled .hamburger__lines::before,
  .site-header.is-scrolled .hamburger__lines::after,
  .site-header.is-light .hamburger__lines::before,
  .site-header.is-light .hamburger__lines::after,
  .site-header.is-dark .hamburger__lines::before,
  .site-header.is-dark .hamburger__lines::after {
    background: #fff;
  }

  .site-header .header-contact,
  .site-header .hamburger,
  .site-header.is-scrolled .header-contact,
  .site-header.is-scrolled .hamburger,
  .site-header.is-light .header-contact,
  .site-header.is-light .hamburger,
  .site-header.is-dark .header-contact,
  .site-header.is-dark .hamburger {
    border-color: rgba(255, 255, 255, 0.85);
    background: transparent;
  }

  .site-header.is-dark .header-tel__icon,
  .site-header.is-light .header-tel__icon,
  .site-header.is-scrolled .header-tel__icon {
    background: #fff;
  }

  .site-header.is-dark .header-tel__icon img,
  .site-header.is-light .header-tel__icon img,
  .site-header.is-scrolled .header-tel__icon img {
    filter: none;
  }

  .page-lower .site-header {
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
}

@media (min-width: 768px) and (max-width: 1279px) {
  :root {
    --header-h: 94px;
  }

  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: auto;
    width: 100vw;
    max-width: 100vw;
    min-height: 72px;
    padding-top: max(4px, env(safe-area-inset-top));
    overflow-x: clip;
    overflow-y: visible;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: none;
    transition:
      background-color 0.25s ease,
      backdrop-filter 0.25s ease,
      border-color 0.25s ease,
      min-height 0.25s ease;
  }

  .site-header__inner {
    width: calc(100vw - 40px);
    max-width: calc(100vw - 40px);
    margin: 0 auto;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 10px; /* 少し広め */
    min-width: 0;
    padding-top: 4px; /* SP寄せ */
  }

  /* SPと同じ考え方でスクロール時にだけ見た目変更 */
  .site-header.is-scrolled {
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    min-height: 64px;
    padding-top: max(4px, env(safe-area-inset-top));
  }

  .site-header.is-scrolled .site-header__inner {
    align-items: center;
    padding-top: 0;
  }

  /* ===== ロゴ ===== */
  .brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    min-width: 0;
    flex: 0 0 auto;
    height: auto;
    transform: translateY(-8px);
  }

  .brand__mark {
    width: auto;
  }

  .brand__label {
    display: block;
  }

  .brand__icon {
    width: 66px;
    transform: none;
    margin-top: 5px;
    opacity: 1;
    pointer-events: auto;
    transition:
      opacity 0.25s ease,
      transform 0.25s ease,
      width 0.25s ease;
  }

  .brand__text {
    display: block;
    height: 12px;
    width: auto;
    margin-top: -6px;
    transform: none;
    opacity: 1;
    pointer-events: auto;
    transition:
      opacity 0.25s ease,
      transform 0.25s ease;
  }

  .site-header.is-scrolled .brand__icon {
    width: 78px;
    opacity: 1;
    transform: translateY(10px);
    pointer-events: auto;
  }

  .site-header.is-scrolled .brand__text {
    display: none;
  }

  .site-header.is-scrolled .brand {
    height: auto;
    min-height: 64px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: none;
  }

  .header-actions {
    display: flex;
    align-items: flex-start;
    gap: 15px;
    flex: 0 0 auto;
    margin-left: auto;
  }

  .header-contact {
    display: none;
  }

  .header-tel {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    text-decoration: none;
    color: #fff;
    min-width: 44px;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 0;
  }

  .header-tel__icon {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: #fff;
    flex-shrink: 0;
  }

  .header-tel__icon img {
    width: 24px;
    height: 24px;
    display: block;
    filter: none;
  }

  .header-tel__num {
    display: none;
  }

  .header-tel__label {
    display: block;
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.04em;
    color: #fff;
    white-space: nowrap;
  }

  .header-mail {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    text-decoration: none;
    color: #fff;
    min-width: 64px;
  }

  .header-mail__icon {
    width: 64px;
    height: 40px;
    display: grid;
    place-items: center;
    flex-shrink: 0;
  }

  .header-mail__icon img {
    width: 64px;
    height: 40px;
    display: block;
    object-fit: contain;
  }

  .header-mail__label {
    display: block;
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.02em;
    color: #fff;
    white-space: nowrap;
  }

  .hamburger {
    width: 40px;
    height: auto;
    min-height: 40px;
    border: none;
    padding: 10px 0 0;
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 4px;
    background: transparent;
    cursor: pointer;
    position: relative;
  }

  .hamburger__lines {
    width: 34px;
    height: 24px;
    position: relative;
    display: block;
  }

  .hamburger__lines::before,
  .hamburger__lines::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    width: 34px;
    height: 2px;
    border-radius: 0;
    background: #fff;
    transition:
      transform 0.18s ease,
      top 0.18s ease,
      opacity 0.18s ease;
  }

  .hamburger__lines::before {
    top: 6px;
  }

  .hamburger__lines::after {
    top: 16px;
  }

  html.is-menu-open .hamburger__lines::before {
    top: 11px;
    transform: rotate(45deg);
  }

  html.is-menu-open .hamburger__lines::after {
    top: 11px;
    transform: rotate(-45deg);
  }

  .hamburger__label {
    display: block;
    font-size: 10px;
    line-height: 1;
    letter-spacing: 0.04em;
    color: #fff;
    white-space: nowrap;
    padding-top: 7px;
  }

  /* tablet もSPと同じく色固定 */
  .site-header,
  .site-header.is-scrolled,
  .site-header.is-light,
  .site-header.is-dark {
    color: #fff;
  }

  .site-header .header-tel,
  .site-header .header-mail,
  .site-header .header-contact,
  .site-header.is-scrolled .header-tel,
  .site-header.is-scrolled .header-mail,
  .site-header.is-scrolled .header-contact,
  .site-header.is-light .header-tel,
  .site-header.is-light .header-mail,
  .site-header.is-light .header-contact,
  .site-header.is-dark .header-tel,
  .site-header.is-dark .header-mail,
  .site-header.is-dark .header-contact {
    color: #fff;
  }

  .site-header .hamburger__lines::before,
  .site-header .hamburger__lines::after,
  .site-header.is-scrolled .hamburger__lines::before,
  .site-header.is-scrolled .hamburger__lines::after,
  .site-header.is-light .hamburger__lines::before,
  .site-header.is-light .hamburger__lines::after,
  .site-header.is-dark .hamburger__lines::before,
  .site-header.is-dark .hamburger__lines::after {
    background: #fff;
  }

  .site-header .header-contact,
  .site-header .hamburger,
  .site-header.is-scrolled .header-contact,
  .site-header.is-scrolled .hamburger,
  .site-header.is-light .header-contact,
  .site-header.is-light .hamburger,
  .site-header.is-dark .header-contact,
  .site-header.is-dark .hamburger {
    border-color: rgba(255, 255, 255, 0.85);
    background: transparent;
  }

  .site-header .header-tel__icon,
  .site-header.is-scrolled .header-tel__icon,
  .site-header.is-light .header-tel__icon,
  .site-header.is-dark .header-tel__icon {
    background: #fff;
  }

  .site-header .header-tel__icon img,
  .site-header.is-scrolled .header-tel__icon img,
  .site-header.is-light .header-tel__icon img,
  .site-header.is-dark .header-tel__icon img {
    filter: none;
  }

  .page-lower .site-header {
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
}

@media (min-width: 1280px) and (max-width: 1580px) {
  :root {
    --header-h: 94px;
  }

  .site-header {
    color: #fff;
    position: fixed;
    inset: 0 0 auto 0;
    height: var(--header-h);
    z-index: 1000;
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0);
    transition:
      background-color 0.2s ease,
      border-color 0.2s ease;
  }

  .site-header.is-scrolled {
    background: none;
    backdrop-filter: blur(1px);
    -webkit-backdrop-filter: blur(1px);
    border-bottom: none;
    min-height: 88px;
    padding-top: max(4px, env(safe-area-inset-top));
  }

  .site-header__inner {
    width: calc(100% - 40px);
    max-width: calc(100vw - 40px);
    margin: 0 auto;
    padding: 0;
    box-sizing: border-box;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    min-width: 0;
  }

  .brand {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 0;
    min-width: 0;
    flex: 0 0 auto;
    height: auto;
    transform: translateY(40px);
    margin-left: 0;
  }

  .brand__icon {
    width: clamp(120px, 9vw, 150px);
    height: auto;
    display: block;
    transform: translateY(6px);
  }

  .brand__text {
    height: clamp(18px, 1.4vw, 24px);
    width: auto;
    margin-top: -10px;
    display: block;
    transform: translateY(0);
    transition:
      opacity 0.25s ease,
      transform 0.25s ease;
  }

  .site-header.is-scrolled .brand__icon,
  .site-header.is-scrolled .brand__text {
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
  }

  .brand__mark {
    width: 100%;
    height: auto;
    display: block;
  }

  /* ===== 右側 ===== */
  .header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-left: auto;
    flex: 0 0 auto;
  }

  .header-tel {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    text-decoration: none;
    color: rgba(255, 255, 255, 0.92);
    font-size: 16px;
    letter-spacing: 0.02em;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    padding: 0;
  }

  .header-tel__icon {
    width: 40px;
    height: 40px;
    border-radius: 999px;
    display: grid;
    place-items: center;
    background: #fff;
    flex-shrink: 0;
  }

  .header-tel__icon img {
    width: 26px;
    height: 26px;
    display: block;
  }

  .header-tel__num {
    font-family: var(
      --mono,
      ui-monospace,
      Menlo,
      Monaco,
      Consolas,
      "Liberation Mono",
      monospace
    );
    font-size: clamp(18px, 1.6vw, 24px);
    font-weight: 500;
    letter-spacing: 0.02em;
  }

  .header-contact {
    height: 38px;
    padding: 0 14px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    border-radius: 3px;
    color: rgba(255, 255, 255, 0.92);
    border: 1px solid rgba(255, 255, 255, 0.9);
    background: transparent;
    font-size: clamp(14px, 1.1vw, 18px);
    font-weight: 500;
    letter-spacing: 0.08em;
    transition: all 0.25s ease;
  }

  .header-contact:hover {
    background: rgba(255, 255, 255, 0.205);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(0, 0, 0, 0.25);
  }

  .hamburger {
    width: 44px;
    height: 38px;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.9);
    background: transparent;
    cursor: pointer;
    position: relative;
    display: grid;
    place-items: center;
  }

  .hamburger__lines {
    width: 20px;
    height: 14px;
    position: relative;
    display: block;
  }

  .hamburger__lines::before,
  .hamburger__lines::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    height: 2px;
    border-radius: 0;
    background: rgba(255, 255, 255, 0.95);
    transition:
      transform 0.18s ease,
      top 0.18s ease,
      opacity 0.18s ease;
  }

  .hamburger__lines::before {
    top: 2px;
  }

  .hamburger__lines::after {
    top: 10px;
  }

  .site-header.is-scrolled .header-tel,
  .site-header.is-scrolled .header-contact {
    color: rgba(0, 0, 0, 0.8);
  }

  .site-header.is-scrolled .hamburger__lines::before,
  .site-header.is-scrolled .hamburger__lines::after {
    background: rgba(0, 0, 0, 0.8);
  }

  .site-header.is-scrolled .header-contact,
  .site-header.is-scrolled .hamburger {
    border-color: rgba(0, 0, 0, 0.6);
  }

  html.is-menu-open .hamburger__lines::before {
    top: 6px;
    transform: rotate(45deg);
  }

  html.is-menu-open .hamburger__lines::after {
    top: 6px;
    transform: rotate(-45deg);
  }

  /* ===== メニュー ===== */
  .global-menu {
    position: fixed;
    top: 0;
    right: 0;
    height: 100dvh;
    width: min(50vw, 700px);
    background: var(--menu-bg);
    color: var(--menu-fg);
    z-index: 1300;
    overflow: auto;
    transform: translateX(100%);
    transition: transform 0.28s ease;
    box-shadow: -20px 0 60px rgba(0, 0, 0, 0.35);
  }

  html.is-menu-open .global-menu {
    transform: translateX(0);
  }

  .global-menu__inner {
    width: calc(100% - 80px);
    margin: 0 auto;
    padding: 42px 0 34px;
  }

  .global-menu__head {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    margin-bottom: 18px;
  }

  .menu-close {
    width: 44px;
    height: 44px;
    border-radius: 6px;
    border: 1px solid rgba(255, 255, 255, 0.18);
    background: transparent;
    color: var(--menu-fg);
    cursor: pointer;
    font-size: 26px;
    line-height: 1;
  }

  .menu-group {
    display: grid;
    grid-template-columns: 180px 1fr 1fr;
    column-gap: 20px;
    padding: 22px 0;
    align-items: start;
  }

  .menu-group__left {
    font-size: 16px;
    letter-spacing: 0.18em;
    font-weight: 600;
    white-space: nowrap;
    opacity: 0.95;
    padding-top: 2px;
    line-height: 1.2;
  }

  .menu-group__rule {
    height: 1px;
    background: rgba(255, 255, 255, 0.22);
    align-self: start;
    margin-top: 12px;
  }

  .menu-group__right {
    list-style: none;
    margin: 0;
    padding: 0;
    display: grid;
    gap: 16px;
    align-content: start;
  }

  .menu-group__right a {
    color: rgba(255, 255, 255, 0.72);
    text-decoration: none;
    font-size: 15px;
    letter-spacing: 0.04em;
  }

  .menu-group__right a:hover {
    color: rgba(255, 255, 255, 0.92);
  }

  .menu-group__right--grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    align-items: start;
  }

  .menu-group a {
    color: var(--menu-muted);
    text-decoration: none;
    font-size: 15px;
    letter-spacing: 0.04em;
  }

  .menu-group a:hover {
    color: var(--menu-fg);
  }

  .menu-footer {
    margin-top: 28px;
    padding-top: 22px;
  }

  .menu-sns {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 28px;
    margin: 24px 0 14px;
  }

  .menu-sns a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    perspective: 800px;
  }

  .menu-sns img {
    display: block;
    height: 30px;
    width: auto;
    transform-style: preserve-3d;
    backface-visibility: visible;
  }

  .menu-sns a:hover img {
    animation: snsFlip 0.8s linear infinite;
  }

  .menu-sns a:nth-child(3) img {
    height: 38px;
  }

  .menu-copy {
    margin: 0;
    text-align: center;
    color: rgba(255, 255, 255, 0.55);
    font-size: 11px;
    letter-spacing: 0.14em;
  }

  body.is-menu-open {
    position: fixed;
    left: 0;
    right: 0;
    width: 100%;
  }

  .site-header.is-dark .header-tel,
  .site-header.is-dark .header-contact {
    color: #000;
  }

  .site-header.is-dark .hamburger__lines::before,
  .site-header.is-dark .hamburger__lines::after {
    background: #000;
  }

  .site-header.is-light .header-tel,
  .site-header.is-light .header-contact {
    color: #fff;
  }

  .site-header.is-light .hamburger__lines::before,
  .site-header.is-light .hamburger__lines::after {
    background: #fff;
  }

  .site-header.is-dark .header-contact,
  .site-header.is-dark .hamburger {
    border-color: rgba(0, 0, 0, 0.7);
    background: rgba(255, 255, 255, 0);
  }

  .site-header.is-dark .header-tel {
    border-color: rgba(0, 0, 0, 0.7);
  }

  .site-header.is-dark .header-tel__icon {
    background: #000;
  }

  .site-header.is-dark .header-tel__icon img {
    filter: brightness(0) invert(1);
  }

  .site-header.is-light .header-contact,
  .site-header.is-light .hamburger {
    border-color: rgba(255, 255, 255, 0.85);
  }

  .header-tel__label,
  .header-mail,
  .hamburger__label {
    display: none;
  }

  .page-lower .site-header {
    background: rgba(5, 10, 20, 0.88);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  }
}

@media (min-width: 1280px) {
  .page-lower {
    --hero-offset: 20px;
  }

  .page-lower #siteHeader {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: #fff;
    border-bottom: 1px solid #d9d9d9;
    z-index: 1000;
  }

  .page-lower .lower-hero__inner {
    padding-top: calc(var(--header-h) + var(--hero-offset));
  }

  .page-lower .lower-hero__bgWord {
    top: calc(50% + (var(--header-h) / 2));
  }

  .page-lower #siteHeader,
  .page-lower #siteHeader a,
  .page-lower #siteHeader .header-tel,
  .page-lower #siteHeader .header-contact,
  .page-lower #siteHeader .brand__text {
    color: #111;
  }

  .page-lower #siteHeader .header-tel__icon {
    background: #111;
  }

  .page-lower #siteHeader .header-tel__icon img {
    filter: brightness(0) invert(1);
  }

  .page-lower #siteHeader .header-contact,
  .page-lower #siteHeader .menu-btn {
    border-color: #111;
  }

  .page-lower #siteHeader .hamburger {
    color: #111;
    border-color: #111;
  }

  .page-lower #siteHeader .hamburger__label {
    color: #111;
  }

  .page-lower #siteHeader .hamburger__lines::before,
  .page-lower #siteHeader .hamburger__lines::after {
    background: #111;
  }

  .page-lower #siteHeader .brand__text {
    display: none;
  }

  .page-lower #siteHeader .brand__icon {
    width: 120px;
    transform: translateY(-28px);
  }

  .page-lower #siteHeader.is-scrolled .brand__icon {
    opacity: 1;
    pointer-events: auto;
    transform: translateY(-28px);
  }
}