/* ========== RESET & VARIABLES ========== */
*,
*::before,
*::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  --c-accent: #c4956a;
  --c-accent-light: #e8d5c0;
  --c-accent-dark: #a07650;
  --c-bg: #faf9f7;
  --c-bg-alt: #f3f0ec;
  --c-dark: #1a1a1a;
  --c-dark-soft: #2a2520;
  --c-white: #ffffff;
  --c-text: #2a2520;
  --c-text-light: #6b6560;
  --c-border: #e8e5e0;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-serif: 'Noto Serif JP', serif;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  color: var(--c-text);
  background: var(--c-bg);
  line-height: 1.8;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

.sp-only { display: none; }

.container {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ========== HEADER ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(250, 249, 247, 0.9);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: box-shadow 0.3s;
}

.header.scrolled {
  box-shadow: 0 1px 12px rgba(0, 0, 0, 0.06);
}

.header__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.header__logo {
  display: flex;
  align-items: center;
}

.logo-shapes {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.08em;
}

.shape {
  display: inline-block;
  width: 8px;
  height: 8px;
}

.shape.circle {
  border-radius: 50%;
  background: var(--c-accent);
}

.shape.triangle {
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-bottom: 8px solid var(--c-accent);
}

.shape.square {
  background: var(--c-accent);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 12px;
  letter-spacing: 0.08em;
}

.header__nav a {
  opacity: 0.7;
  transition: opacity 0.3s;
}

.header__nav a:hover {
  opacity: 1;
}

.nav-cta {
  background: var(--c-text);
  color: var(--c-white) !important;
  padding: 8px 20px;
  border-radius: 4px;
  opacity: 1 !important;
  transition: background 0.3s !important;
}

.nav-cta:hover {
  background: var(--c-accent-dark);
}

.header__menu {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}

.header__menu span {
  display: block;
  width: 20px;
  height: 1.5px;
  background: var(--c-text);
  margin: 5px 0;
  transition: 0.3s;
}

/* ========== SECTIONS ========== */
.section {
  padding: 100px 0;
}

.section--alt {
  background: var(--c-bg-alt);
}

.section--dark {
  background: var(--c-dark-soft);
  color: var(--c-bg);
}

.section--dark .section__label {
  color: var(--c-accent-light);
}

.section--dark .section__subtitle {
  color: rgba(250, 249, 247, 0.6);
}

.section__label {
  font-size: 11px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 20px;
  font-weight: 500;
}

.section__title {
  font-family: var(--font-serif);
  font-size: 30px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
  margin-bottom: 20px;
}

.section__subtitle {
  font-size: 14px;
  line-height: 2;
  color: var(--c-text-light);
  margin-bottom: 48px;
}

/* ========== HERO ========== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 40%, rgba(232, 213, 192, 0.5) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 60%, rgba(196, 149, 106, 0.2) 0%, transparent 50%),
    radial-gradient(ellipse at 50% 80%, rgba(243, 240, 236, 0.8) 0%, transparent 60%),
    var(--c-bg);
}

.hero__content {
  position: relative;
  text-align: center;
  padding: 0 24px;
}

.hero__sub {
  font-size: 11px;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--c-accent);
  margin-bottom: 32px;
  font-weight: 500;
}

.hero__title {
  margin-bottom: 32px;
}

.hero__title-line {
  display: block;
  font-family: var(--font-serif);
  font-size: 34px;
  font-weight: 600;
  line-height: 1.7;
  letter-spacing: 0.06em;
}

.hero__title-line--accent {
  font-size: 44px;
  color: var(--c-accent);
  margin-top: 8px;
}

.hero__lead {
  font-size: 14px;
  line-height: 2.2;
  color: var(--c-text-light);
  margin-bottom: 48px;
}

.hero__cta-group {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.hero__cta {
  padding: 14px 36px;
  border-radius: 4px;
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: all 0.3s;
  background: var(--c-text);
  color: var(--c-white);
}

.hero__cta:hover {
  background: var(--c-accent-dark);
}

.hero__cta--sub {
  background: transparent;
  color: var(--c-text);
  border: 1px solid var(--c-border);
}

.hero__cta--sub:hover {
  border-color: var(--c-accent);
  color: var(--c-accent);
}

.hero__scroll {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.hero__scroll span {
  font-size: 10px;
  letter-spacing: 0.15em;
  color: var(--c-text-light);
  opacity: 0.5;
}

.hero__scroll-line {
  width: 1px;
  height: 40px;
  background: var(--c-accent);
  opacity: 0.4;
  animation: scrollLine 2s infinite;
}

@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ========== VISION ========== */
.vision__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-top: 48px;
}

.vision__text p {
  font-size: 15px;
  line-height: 2.2;
  color: var(--c-text-light);
  margin-bottom: 20px;
}

.vision__text strong {
  font-weight: 600;
  color: var(--c-text);
}

.vision__photo {
  width: 100%;
  border-radius: 12px;
  object-fit: cover;
  aspect-ratio: 3 / 4;
  box-shadow: 0 16px 48px rgba(196, 149, 106, 0.15);
}

/* ========== BRIDGE ========== */
.bridge__diagram {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 32px;
  align-items: center;
  margin-top: 56px;
}

.bridge__side {
  padding: 40px 32px;
  border-radius: 12px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.bridge__side-label {
  font-size: 10px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--c-accent-light);
  margin-bottom: 16px;
  font-weight: 500;
}

.bridge__side h3 {
  font-family: var(--font-serif);
  font-size: 18px;
  font-weight: 600;
  line-height: 1.6;
  margin-bottom: 20px;
}

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

.bridge__side li {
  font-size: 13px;
  opacity: 0.7;
  padding-left: 16px;
  position: relative;
}

.bridge__side li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 1px;
  background: var(--c-accent-light);
}

.bridge__center {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  padding: 24px 16px;
  position: relative;
}

.bridge__logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  background: var(--c-accent-dark);
  padding: 16px 24px;
  border-radius: 8px;
  position: relative;
  z-index: 1;
}

.bridge__lines {
  position: absolute;
  top: 0;
  bottom: 0;
  left: -40px;
  right: -40px;
  color: var(--c-accent-light);
  opacity: 0.5;
}

.bridge__lines svg {
  width: 100%;
  height: 100%;
}

.bridge__center-text {
  font-size: 11px;
  letter-spacing: 0.1em;
  opacity: 0.6;
  text-align: center;
  position: relative;
  z-index: 1;
}

/* ========== SERVICE ========== */
.service__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  margin-top: 48px;
}

.service__img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  display: block;
}

.service__item {
  background: var(--c-white);
  border-radius: 8px;
  border: 1px solid var(--c-border);
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
}

.service__item:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.service__body {
  padding: 28px;
}

.service__number {
  font-size: 40px;
  font-weight: 700;
  color: var(--c-accent-light);
  line-height: 1;
  margin-bottom: 16px;
}

.service__item h3 {
  font-size: 17px;
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.service__item p {
  font-size: 13px;
  line-height: 2;
  color: var(--c-text-light);
}

/* ========== PROFESSIONAL ========== */
.pro__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.pro__card {
  background: var(--c-white);
  padding: 36px 28px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  transition: transform 0.3s, box-shadow 0.3s;
}

.pro__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.pro__icon {
  width: 48px;
  height: 48px;
  color: var(--c-accent);
  margin-bottom: 20px;
}

.pro__card h3 {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: 0.05em;
}

.pro__card p {
  font-size: 13px;
  line-height: 2;
  color: var(--c-text-light);
}

/* ========== IMPACT ========== */
.impact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  gap: 24px;
  margin-top: 48px;
}

.impact__card {
  background: var(--c-white);
  padding: 36px 28px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  transition: transform 0.3s, box-shadow 0.3s;
}

.impact__card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.06);
}

.impact__card--main {
  border-color: var(--c-accent-light);
  background: linear-gradient(135deg, #fdfaf7, #faf5ef);
}

.impact__num {
  font-size: 56px;
  font-weight: 700;
  color: var(--c-accent);
  line-height: 1;
  margin-bottom: 12px;
}

.impact__num small {
  font-size: 28px;
  font-weight: 500;
}

.impact__label {
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--c-accent);
  text-transform: uppercase;
  margin-bottom: 12px;
  font-weight: 500;
}

.impact__icon {
  width: 40px;
  height: 40px;
  color: var(--c-accent);
  margin-bottom: 16px;
}

.impact__card h3 {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 12px;
  letter-spacing: 0.03em;
}

.impact__card p {
  font-size: 13px;
  line-height: 2;
  color: var(--c-text-light);
}

.impact__message {
  text-align: center;
  padding: 40px 32px;
  margin-top: 48px;
  background: var(--c-bg-alt);
  border-radius: 8px;
}

.impact__message p {
  font-size: 15px;
  line-height: 2.2;
  color: var(--c-text);
}

/* ========== ECOSYSTEM ========== */
.eco__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.eco__card {
  background: var(--c-white);
  padding: 28px 24px;
  border-radius: 8px;
  border: 1px solid var(--c-border);
  transition: transform 0.3s;
}

.eco__card:hover {
  transform: translateY(-3px);
}

.eco__role {
  font-size: 12px;
  font-weight: 500;
  letter-spacing: 0.08em;
  color: var(--c-accent);
  margin-bottom: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--c-border);
}

.eco__card p {
  font-size: 13px;
  line-height: 1.9;
  color: var(--c-text-light);
}

/* ========== MODEL ========== */
.model__flow {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 24px;
  margin-top: 56px;
}

.model__step {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: 12px;
  padding: 32px 28px;
  text-align: center;
  max-width: 240px;
  flex: 1;
}

.model__step--center {
  border-color: var(--c-accent-light);
  background: linear-gradient(135deg, #fdfaf7, #faf5ef);
}

.model__step-icon {
  width: 64px;
  height: 64px;
  color: var(--c-accent);
  margin: 0 auto 16px;
}

.model__step-brand {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.model__step h3 {
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.model__step p {
  font-size: 12px;
  line-height: 1.8;
  color: var(--c-text-light);
}

.model__arrow {
  width: 32px;
  color: var(--c-accent);
  flex-shrink: 0;
}

.model__note {
  text-align: center;
  padding: 40px 32px;
  margin-top: 48px;
  background: var(--c-bg-alt);
  border-radius: 8px;
}

.model__note p {
  font-size: 14px;
  line-height: 2.2;
  color: var(--c-text-light);
}

.model__note strong {
  color: var(--c-text);
  font-weight: 500;
}

/* ========== JOIN ========== */
.join {
  text-align: center;
}

.join__content {
  max-width: 600px;
  margin: 0 auto;
}

.join__title {
  font-family: var(--font-serif);
  font-size: 32px;
  font-weight: 600;
  line-height: 1.6;
  letter-spacing: 0.04em;
  margin-bottom: 24px;
}

.join__text {
  font-size: 14px;
  line-height: 2.2;
  opacity: 0.7;
  margin-bottom: 40px;
}

.join__buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.join__button {
  padding: 16px 36px;
  border-radius: 4px;
  font-size: 13px;
  letter-spacing: 0.08em;
  transition: all 0.3s;
  background: var(--c-accent);
  color: var(--c-white);
}

.join__button:hover {
  background: var(--c-accent-dark);
}

.join__button--outline {
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.3);
  color: var(--c-bg);
}

.join__button--outline:hover {
  border-color: var(--c-accent-light);
  color: var(--c-accent-light);
}

/* ========== ABOUT ========== */
.about__info {
  margin-top: 32px;
}

.about__info dl {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 16px 24px;
  max-width: 600px;
}

.about__info dt {
  font-size: 12px;
  color: var(--c-text-light);
  letter-spacing: 0.05em;
}

.about__info dd {
  font-size: 14px;
}

/* ========== FOOTER ========== */
.footer {
  padding: 40px 0;
  border-top: 1px solid var(--c-border);
}

.footer__inner {
  max-width: 1080px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer__logo {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.08em;
  opacity: 0.6;
}

.footer__copy {
  font-size: 11px;
  color: var(--c-text-light);
  opacity: 0.5;
}

/* ========== FADE-IN ========== */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.7s ease-out, transform 0.7s ease-out;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
  .pc-only { display: none; }
  .sp-only { display: inline; }

  .header__nav { display: none; }
  .header__menu { display: block; }

  .header__nav.active {
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(250, 249, 247, 0.98);
    padding: 48px 24px;
    gap: 24px;
    font-size: 16px;
    z-index: 99;
  }

  .section { padding: 64px 0; }
  .section__title { font-size: 22px; }

  .hero__title-line { font-size: 24px; }
  .hero__title-line--accent { font-size: 32px; }
  .hero__cta-group { flex-direction: column; align-items: center; }

  .vision__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .vision__image { order: -1; }

  .vision__photo {
    max-width: 320px;
    margin: 0 auto;
    aspect-ratio: 2 / 3;
  }

  .bridge__diagram {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .bridge__center {
    padding: 32px 16px;
  }

  .bridge__lines { display: none; }

  .service__grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .service__img { height: 180px; }

  .pro__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .impact__grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .eco__grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

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

  .model__step { max-width: 100%; }

  .model__arrow {
    transform: rotate(90deg);
  }

  .join__title { font-size: 24px; }
  .join__buttons { flex-direction: column; align-items: center; }

  .about__info dl {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .about__info dt {
    margin-top: 12px;
  }
}