body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--color-black);
  background: var(--color-white);
}

.container {
  width: min(100% - 40px, var(--container-width));
  margin-inline: auto;
}

.section {
  padding-block: 72px;
  scroll-margin-top: var(--header-height);
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-label {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: 0.12em;
  color: var(--color-black);
  margin-bottom: 8px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.125rem, 2.5vw, 1.375rem);
  font-weight: 500;
  line-height: 1.7;
  letter-spacing: 0.08em;
  color: var(--color-gray-600);
}

.section-lead {
  font-family: var(--font-serif);
  font-size: clamp(1.25rem, 3vw, 1.75rem);
  font-weight: 500;
  line-height: 1.9;
  letter-spacing: 0.06em;
  margin-bottom: 24px;
}

.section-desc {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 2;
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.55);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.35);
  transition: background var(--transition), box-shadow var(--transition), border-color var(--transition);
  overflow: visible;
}

.header--scrolled {
  background: rgba(255, 255, 255, 0.88);
  border-bottom-color: var(--color-gray-200);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
}

.header__inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  width: min(100% - 32px, 1200px);
  margin-inline: auto;
  gap: 16px;
  overflow: visible;
}

.header__tag {
  flex: 1;
  min-width: 0;
  font-size: clamp(0.625rem, 1.2vw, 0.75rem);
  letter-spacing: 0.04em;
  color: var(--color-gray-600);
  line-height: 1.4;
}

.header__logo {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -40%);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  z-index: 2;
  width: clamp(160px, 20vw, 220px);
  height: clamp(160px, 20vw, 220px);
  padding: 0;
  border-radius: 50%;
  background: transparent;
  transition:
    width var(--transition),
    height var(--transition),
    transform var(--transition);
}

.header__logo::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: radial-gradient(
    circle closest-side,
    rgba(255, 255, 255, 0.98) 0%,
    rgba(255, 255, 255, 0.95) 48%,
    rgba(255, 255, 255, 0.7) 62%,
    rgba(255, 255, 255, 0.28) 78%,
    rgba(255, 255, 255, 0) 100%
  );
  pointer-events: none;
  z-index: 0;
  transition: opacity var(--transition);
}

.header__logo img {
  height: clamp(88px, 11vw, 118px);
  width: auto;
  max-width: 72%;
  display: block;
  position: relative;
  z-index: 1;
  transition: height var(--transition), max-width var(--transition);
}

.header--scrolled .header__logo {
  width: calc(var(--header-height) - 12px);
  height: calc(var(--header-height) - 12px);
  transform: translate(-50%, -50%);
}

.header--scrolled .header__logo::before {
  opacity: 0;
}

.header--scrolled .header__logo img {
  height: calc(var(--header-height) - 20px);
  max-width: 90%;
}

.header__nav-wrap {
  flex: 1;
  display: flex;
  justify-content: flex-end;
  align-items: center;
  gap: 8px;
}

.header__nav-list {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header__nav-list a {
  font-size: 0.6875rem;
  letter-spacing: 0.04em;
  padding: 8px 12px;
  border: 1px solid var(--color-gray-200);
  border-radius: 4px;
  transition: border-color var(--transition), color var(--transition), background var(--transition);
  white-space: nowrap;
}

.header__nav-list a:hover {
  border-color: var(--color-green);
  color: var(--color-green);
}

.header__nav-list a.header__nav-line {
  background: var(--color-line);
  border-color: var(--color-line);
  color: var(--color-white);
}

.header__nav-list a.header__nav-line:hover {
  opacity: 0.9;
  color: var(--color-white);
}

.header__menu-btn {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 8px;
  border: 1px solid var(--color-gray-200);
  border-radius: 50%;
  align-items: center;
  justify-content: center;
}

.header__menu-btn span {
  display: block;
  width: 14px;
  height: 1.5px;
  background: var(--color-black);
  transition: var(--transition);
}

.header__menu-btn[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(6.5px) rotate(45deg);
}

.header__menu-btn[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.header__menu-btn[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-6.5px) rotate(-45deg);
}

/* Footer */
.footer {
  background: var(--color-white);
  border-top: 1px solid var(--color-gray-200);
  padding-block: 56px 32px;
}

.footer__top {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid var(--color-gray-200);
  margin-bottom: 40px;
  align-items: start;
}

.footer__brand {
  text-align: center;
}

.footer__brand img {
  height: 72px;
  width: auto;
  margin: 0 auto 12px;
}

.footer__brand-name {
  font-family: var(--font-display);
  font-size: 1.125rem;
  letter-spacing: 0.08em;
}

.footer__brand-tag {
  font-size: 0.5625rem;
  letter-spacing: 0.2em;
  color: var(--color-gray-400);
  margin-top: 4px;
  margin-bottom: 16px;
}

.footer__brand a.site-link {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--color-green);
  border-bottom: 1px solid var(--color-green);
}

.footer__info h3 {
  font-size: 0.8125rem;
  font-weight: 500;
  margin-bottom: 8px;
  letter-spacing: 0.06em;
}

.footer__info p,
.footer__info a {
  font-size: 0.875rem;
  line-height: 1.8;
  color: var(--color-gray-600);
}

.footer__info .footer__tel {
  display: block;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--color-black);
  margin-top: 4px;
  letter-spacing: 0.04em;
}

.footer__info .footer__tel:hover {
  color: var(--color-green);
}

.footer__social {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.footer__social-note {
  font-size: 0.75rem;
  color: var(--color-gray-600);
}

.footer__social-line {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--color-line);
  color: var(--color-white);
  padding: 12px 24px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  width: fit-content;
  transition: opacity var(--transition);
}

.footer__social-line:hover {
  opacity: 0.9;
}

.footer__social-account {
  font-size: 0.75rem;
  color: var(--color-gray-600);
}

.footer__ig {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer__ig a {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  transition: color var(--transition);
}

.footer__ig a:hover {
  color: var(--color-green);
}

.footer__audience {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 32px;
  margin-bottom: 40px;
  align-items: start;
}

.footer__audience-title {
  font-family: var(--font-serif);
  font-size: 1.125rem;
  letter-spacing: 0.06em;
  line-height: 1.8;
  margin-bottom: 12px;
}

.footer__audience-lead {
  font-size: 0.875rem;
  color: var(--color-gray-600);
  line-height: 1.8;
}

.footer__audience-list li {
  position: relative;
  padding-left: 18px;
  font-size: 0.8125rem;
  line-height: 2;
  color: var(--color-gray-600);
}

.footer__audience-list li::before {
  content: "・";
  position: absolute;
  left: 0;
  color: var(--color-green);
}

.footer__copy {
  text-align: center;
  font-size: 0.6875rem;
  color: var(--color-gray-400);
  letter-spacing: 0.04em;
}

/* Fixed CTA */
.fixed-cta {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 99;
  display: none;
  grid-template-columns: 1fr 1fr;
  box-shadow: 0 -2px 20px rgba(0, 0, 0, 0.1);
}

.fixed-cta__btn {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  font-size: 0.875rem;
  letter-spacing: 0.08em;
  font-weight: 500;
  transition: opacity var(--transition);
}

.fixed-cta__btn--contact {
  background: var(--color-white);
  color: var(--color-black);
  border-top: 1px solid var(--color-gray-200);
}

.fixed-cta__btn--line {
  background: var(--color-line);
  color: var(--color-white);
}

.fixed-cta__btn:hover {
  opacity: 0.9;
}

/* Responsive */
@media (max-width: 960px) {
  .header__tag {
    display: block;
    position: absolute;
    left: 50%;
    top: 3px;
    transform: translateX(-50%);
    width: calc(100% - 88px);
    max-width: 260px;
    flex: none;
    text-align: center;
    font-size: 0.5625rem;
    letter-spacing: 0.02em;
    line-height: 1.25;
    color: var(--color-gray-600);
    z-index: 4;
    pointer-events: none;
  }

  .header__logo {
    top: 62%;
    transform: translate(-50%, -50%);
    width: clamp(118px, 24vw, 140px);
    height: clamp(118px, 24vw, 140px);
  }

  .header__logo img {
    height: clamp(58px, 16vw, 72px);
  }

  .header--scrolled .header__logo {
    top: 50%;
    transform: translate(-50%, -50%);
  }

  .header__nav {
    display: none;
  }

  .header__menu-btn {
    display: flex;
  }

  .header__nav.is-open {
    display: block;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: 24px;
  }

  .header__nav.is-open .header__nav-list {
    flex-direction: column;
    gap: 12px;
    align-items: stretch;
  }

  .header__nav.is-open .header__nav-list a {
    text-align: center;
    padding: 14px;
  }

  .footer__top,
  .footer__audience {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .fixed-cta {
    display: grid;
  }

  body {
    padding-bottom: 52px;
  }
}

@media (max-width: 640px) {
  .section {
    padding-block: 56px;
  }

  .section-header {
    margin-bottom: 36px;
  }

  .header__logo img {
    height: clamp(72px, 22vw, 92px);
  }
}