/* =============================================
   貴族組合「誼」- 上品な和モダンデザイン
   メインスタイルシート
   ============================================= */

/* ---- カスタムプロパティ ---- */
:root {
  --color-gold:        #b8965c;
  --color-gold-light:  #d4af7a;
  --color-gold-pale:   #f0e6d2;
  --color-ivory:       #faf7f2;
  --color-ivory-dark:  #f3ede4;
  --color-dark:        #1a1510;
  --color-dark-soft:   #2a2218;
  --color-dark-mid:    #3d3024;
  --color-text:        #2c2418;
  --color-text-light:  #6b5d4e;
  --color-text-muted:  #9e8e7c;
  --color-border:      #d4c5b0;
  --color-border-dark: #8a7460;

  --font-serif-jp: 'Noto Serif JP', 'Yu Mincho', '游明朝', serif;
  --font-sans-jp:  'Noto Sans JP', sans-serif;
  --font-en:       'IM Fell English', Georgia, serif;

  --shadow-sm:   0 2px 8px rgba(26,21,16,.08);
  --shadow-md:   0 6px 24px rgba(26,21,16,.12);
  --shadow-lg:   0 16px 48px rgba(26,21,16,.18);
  --shadow-gold: 0 4px 20px rgba(184,150,92,.25);

  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;

  --transition-fast: .2s ease;
  --transition-mid:  .4s ease;
  --transition-slow: .7s cubic-bezier(.4,0,.2,1);

  --header-height: 72px;
  --container-max: 1100px;
}

/* ---- リセット & ベース ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-serif-jp);
  color: var(--color-text);
  background: var(--color-ivory);
  line-height: 1.9;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

/* ---- ローディング画面 ---- */
#loading-screen {
  position: fixed;
  inset: 0;
  background: var(--color-dark);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity .7s ease, visibility .7s ease;
}
#loading-screen.hidden { opacity: 0; visibility: hidden; }
.loading-inner { text-align: center; }
.loading-kanji {
  display: block;
  font-family: var(--font-serif-jp);
  font-size: clamp(5rem, 15vw, 10rem);
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: 1.5rem;
  letter-spacing: .1em;
  text-shadow: 0 0 40px rgba(184,150,92,.4);
  animation: pulse 1.5s ease-in-out infinite alternate;
}
@keyframes pulse {
  from { opacity: .6; transform: scale(.97); }
  to   { opacity: 1;  transform: scale(1);   }
}
.loading-bar {
  width: 200px;
  height: 2px;
  background: rgba(255,255,255,.15);
  border-radius: 2px;
  margin: 0 auto;
  overflow: hidden;
}
.loading-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold));
  border-radius: 2px;
  animation: load-progress 1.5s ease-out forwards;
}
@keyframes load-progress {
  from { width: 0; }
  to   { width: 100%; }
}

/* ---- コンテナ ---- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
}

/* ---- ヘッダー ---- */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  z-index: 900;
  transition: background var(--transition-mid), box-shadow var(--transition-mid);
  background: transparent;
}
#site-header.scrolled {
  background: rgba(26,21,16,.95);
  box-shadow: 0 2px 20px rgba(0,0,0,.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.nav-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}
.nav-logo {
  display: flex;
  align-items: center;
  gap: .6rem;
  text-decoration: none;
  transition: opacity var(--transition-fast);
}
.nav-logo:hover { opacity: .85; }
.logo-kanji {
  font-family: var(--font-serif-jp);
  font-size: 1.9rem;
  color: var(--color-gold);
  line-height: 1;
  text-shadow: 0 0 12px rgba(184,150,92,.35);
}
.logo-text {
  font-family: var(--font-serif-jp);
  font-size: .8rem;
  color: rgba(255,255,255,.85);
  letter-spacing: .15em;
  font-weight: 300;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}
.nav-links li a {
  font-size: .85rem;
  letter-spacing: .12em;
  color: rgba(255,255,255,.85);
  font-family: var(--font-serif-jp);
  font-weight: 400;
  position: relative;
  padding: .25rem 0;
  transition: color var(--transition-fast);
}
.nav-links li a::after {
  content: '';
  position: absolute;
  bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--color-gold-light);
  transition: width var(--transition-mid);
}
.nav-links li a:hover { color: var(--color-gold-light); }
.nav-links li a:hover::after { width: 100%; }
.nav-links li a.nav-cta {
  border: 1px solid var(--color-gold);
  padding: .45rem 1.2rem;
  border-radius: var(--radius-sm);
  color: var(--color-gold-light);
  transition: all var(--transition-fast);
}
.nav-links li a.nav-cta:hover {
  background: var(--color-gold);
  color: var(--color-dark);
}
.nav-links li a.nav-cta::after { display: none; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  width: 30px;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  height: 1.5px;
  background: rgba(255,255,255,.85);
  border-radius: 2px;
  transition: all var(--transition-mid);
}

/* ---- ヒーロー ---- */
.hero-section {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--color-dark);
}
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 50% 40%, rgba(184,150,92,.08) 0%, transparent 70%),
    linear-gradient(160deg, #0e0c09 0%, #1a1510 45%, #12100d 100%);
}
.hero-bg::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(circle, rgba(184,150,92,.06) 1px, transparent 1px);
  background-size: 40px 40px;
}
.hero-ornament {
  position: absolute;
  width: 200px;
  height: 200px;
  opacity: .08;
  pointer-events: none;
}
.hero-ornament::before,
.hero-ornament::after {
  content: '';
  position: absolute;
  border: 1px solid var(--color-gold);
}
.hero-ornament.top-left    { top: 2rem;    left: 2rem;    }
.hero-ornament.top-right   { top: 2rem;    right: 2rem;   }
.hero-ornament.bottom-left { bottom: 2rem; left: 2rem;    }
.hero-ornament.bottom-right{ bottom: 2rem; right: 2rem;   }
.hero-ornament.top-left::before    { top: 0;     left: 0;    width: 60px; height: 60px; border-right: 0; border-bottom: 0; }
.hero-ornament.top-right::before   { top: 0;     right: 0;   width: 60px; height: 60px; border-left: 0;  border-bottom: 0; }
.hero-ornament.bottom-left::before { bottom: 0;  left: 0;    width: 60px; height: 60px; border-right: 0; border-top: 0; }
.hero-ornament.bottom-right::before{ bottom: 0;  right: 0;   width: 60px; height: 60px; border-left: 0;  border-top: 0; }
.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: calc(var(--header-height) + 2rem) 2rem 4rem;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 1.2s ease, transform 1.2s ease;
}
.hero-content.visible { opacity: 1; transform: translateY(0); }
.hero-subtitle-top {
  font-family: var(--font-serif-jp);
  font-size: clamp(.8rem, 2vw, 1rem);
  color: var(--color-gold);
  letter-spacing: .6em;
  font-weight: 300;
  margin-bottom: .8rem;
}
.hero-title {
  font-family: var(--font-serif-jp);
  font-size: clamp(6rem, 18vw, 13rem);
  color: var(--color-gold);
  line-height: 1;
  font-weight: 700;
  letter-spacing: .05em;
  text-shadow:
    0 0 60px rgba(184,150,92,.35),
    0 0 120px rgba(184,150,92,.15);
  margin-bottom: 1.2rem;
}
.hero-divider {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  margin-bottom: 1rem;
}
.divider-line {
  display: block;
  width: 80px;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
}
.divider-diamond {
  color: var(--color-gold);
  font-size: .55rem;
  opacity: .8;
}
.hero-subtitle-en {
  font-family: var(--font-en);
  font-size: clamp(.75rem, 2vw, .95rem);
  color: rgba(255,255,255,.5);
  letter-spacing: .35em;
  margin-bottom: 1.8rem;
}
.hero-catch {
  font-family: var(--font-serif-jp);
  font-size: clamp(.95rem, 2.5vw, 1.15rem);
  color: rgba(255,255,255,.78);
  line-height: 2.1;
  font-weight: 300;
  letter-spacing: .06em;
  margin-bottom: 2.8rem;
}
.hero-actions {
  display: flex;
  gap: 1.2rem;
  justify-content: center;
  flex-wrap: wrap;
}
.btn-primary {
  display: inline-block;
  padding: .85rem 2.4rem;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  color: var(--color-dark);
  font-family: var(--font-serif-jp);
  font-size: .9rem;
  letter-spacing: .2em;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: all var(--transition-mid);
  box-shadow: var(--shadow-gold);
  position: relative;
  overflow: hidden;
}
.btn-primary::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(184,150,92,.4); }
.btn-primary:hover::before { opacity: 1; }
.btn-secondary {
  display: inline-block;
  padding: .85rem 2.4rem;
  border: 1px solid rgba(184,150,92,.5);
  color: rgba(255,255,255,.85);
  font-family: var(--font-serif-jp);
  font-size: .9rem;
  letter-spacing: .2em;
  border-radius: var(--radius-sm);
  transition: all var(--transition-mid);
}
.btn-secondary:hover {
  border-color: var(--color-gold);
  color: var(--color-gold-light);
  transform: translateY(-2px);
  background: rgba(184,150,92,.05);
}
.hero-scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .5rem;
  z-index: 2;
  animation: bounce-fade 2.5s ease-in-out infinite;
}
.hero-scroll-indicator span {
  font-family: var(--font-en);
  font-size: .62rem;
  letter-spacing: .35em;
  color: rgba(255,255,255,.4);
}
.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, rgba(184,150,92,.5), transparent);
  animation: scroll-grow 2.5s ease-in-out infinite;
}
@keyframes scroll-grow {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@keyframes bounce-fade {
  0%, 100% { opacity: .5; }
  50%       { opacity: 1;  }
}

/* ---- セクション共通 ---- */
.section-divider {
  background: var(--color-dark);
  text-align: center;
  padding: 1.5rem 0;
}
.divider-ornament {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  color: var(--color-gold);
  font-size: .75rem;
  letter-spacing: .25em;
  font-family: var(--font-serif-jp);
  opacity: .7;
}

.section-header {
  text-align: center;
  margin-bottom: clamp(2.5rem, 6vw, 4.5rem);
}
.section-label {
  font-family: var(--font-en);
  font-size: .75rem;
  letter-spacing: .5em;
  color: var(--color-gold);
  margin-bottom: .8rem;
  display: block;
}
.section-title {
  font-family: var(--font-serif-jp);
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 600;
  letter-spacing: .2em;
  line-height: 1.4;
}
.title-underline {
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
  margin: 1rem auto .8rem;
}
.section-desc {
  font-size: .9rem;
  color: var(--color-text-light);
  max-width: 600px;
  margin: 0 auto;
  letter-spacing: .04em;
  line-height: 1.85;
}

/* ---- ウェーブ区切り ---- */
.wave-divider {
  height: 80px;
  position: relative;
  overflow: hidden;
}
.wave-dark {
  background: linear-gradient(to bottom right, var(--color-ivory) 49%, var(--color-dark-soft) 50%);
}
.wave-light {
  background: linear-gradient(to bottom right, var(--color-dark-soft) 49%, var(--color-ivory) 50%);
}

/* ---- 組合についてセクション ---- */
.about-section {
  background: var(--color-ivory);
  padding: clamp(4rem, 10vw, 7rem) 0;
}
.about-intro {
  text-align: center;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}
.lead-text {
  font-size: clamp(1rem, 2.2vw, 1.15rem);
  color: var(--color-text);
  line-height: 2.1;
  letter-spacing: .04em;
  font-weight: 300;
}
.pc-only { display: inline; }
.about-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.8rem;
}
.about-card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-top: 3px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: 2.4rem 2rem;
  text-align: center;
  transition: transform var(--transition-mid), box-shadow var(--transition-mid);
  position: relative;
  overflow: hidden;
}
.about-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--color-gold-light), var(--color-gold), var(--color-gold-light));
}
.about-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.card-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, var(--color-gold-pale), var(--color-ivory-dark));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.4rem;
  border: 1px solid var(--color-border);
}
.card-icon i {
  font-size: 1.4rem;
  color: var(--color-gold);
}
.about-card h3 {
  font-family: var(--font-serif-jp);
  font-size: 1.05rem;
  letter-spacing: .12em;
  margin-bottom: .8rem;
  color: var(--color-dark-soft);
  font-weight: 600;
}
.about-card p {
  font-size: .87rem;
  color: var(--color-text-light);
  line-height: 1.95;
  letter-spacing: .03em;
}

/* ---- 設立目的セクション ---- */
.purpose-section {
  background: var(--color-dark-soft);
  padding: clamp(4rem, 10vw, 7rem) 0;
  color: var(--color-ivory);
}
.purpose-section .section-title { color: var(--color-ivory); }
.purpose-section .section-desc  { color: rgba(255,255,255,.6); }

.purpose-list {
  display: flex;
  flex-direction: column;
  gap: 1.6rem;
  margin-bottom: clamp(2.5rem, 6vw, 4rem);
}
.purpose-item {
  display: grid;
  grid-template-columns: 64px 1fr;
  gap: 2rem;
  align-items: start;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(184,150,92,.2);
  border-radius: var(--radius-md);
  padding: 2rem 2.4rem;
  transition: background var(--transition-mid), border-color var(--transition-mid);
}
.purpose-item:hover {
  background: rgba(184,150,92,.06);
  border-color: rgba(184,150,92,.4);
}
.purpose-num {
  font-family: var(--font-serif-jp);
  font-size: 2.2rem;
  color: var(--color-gold);
  font-weight: 700;
  text-align: center;
  line-height: 1.2;
  padding-top: .2rem;
  opacity: .85;
}
.purpose-body h3 {
  font-family: var(--font-serif-jp);
  font-size: 1.05rem;
  letter-spacing: .1em;
  margin-bottom: .7rem;
  color: var(--color-gold-light);
  font-weight: 600;
}
.purpose-body p {
  font-size: .87rem;
  color: rgba(255,255,255,.72);
  line-height: 2;
  letter-spacing: .03em;
}

.purpose-quote {
  background: rgba(184,150,92,.07);
  border: 1px solid rgba(184,150,92,.3);
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius-md);
  padding: 2.5rem 3rem 2rem;
  position: relative;
  text-align: center;
}
.quote-mark {
  font-family: Georgia, serif;
  font-size: 3.5rem;
  color: var(--color-gold);
  line-height: 1;
  margin-bottom: .5rem;
  opacity: .6;
}
.purpose-quote p {
  font-size: clamp(.95rem, 2vw, 1.08rem);
  color: rgba(255,255,255,.85);
  line-height: 2.1;
  letter-spacing: .04em;
  font-weight: 300;
  margin-bottom: 1rem;
}
.purpose-quote cite {
  font-size: .8rem;
  color: var(--color-gold);
  letter-spacing: .08em;
  font-style: normal;
}

/* ---- 華族の歴史セクション ---- */
.history-section {
  background: var(--color-ivory);
  padding: clamp(4rem, 10vw, 7rem) 0;
}

.timeline {
  position: relative;
  max-width: 820px;
  margin: 0 auto;
}
.timeline::before {
  content: '';
  position: absolute;
  left: 100px;
  top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--color-gold) 5%, var(--color-gold) 95%, transparent);
  opacity: .4;
}
.timeline-item {
  display: grid;
  grid-template-columns: 100px 1fr;
  gap: 2.5rem;
  margin-bottom: 3rem;
  position: relative;
}
.timeline-marker {
  text-align: right;
  position: relative;
  padding-right: 1.4rem;
}
.timeline-year {
  display: block;
  font-family: var(--font-en);
  font-size: 1.05rem;
  color: var(--color-gold);
  letter-spacing: .04em;
  font-style: italic;
}
.timeline-dot {
  position: absolute;
  right: -6px;
  top: .45rem;
  width: 11px;
  height: 11px;
  background: var(--color-gold);
  border-radius: 50%;
  border: 2px solid var(--color-ivory);
  box-shadow: 0 0 0 2px var(--color-gold);
}
.timeline-content {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1.6rem 2rem;
  transition: box-shadow var(--transition-mid);
}
.timeline-content:hover { box-shadow: var(--shadow-sm); }
.timeline-content h3 {
  font-size: 1rem;
  letter-spacing: .1em;
  margin-bottom: .5rem;
  color: var(--color-dark-soft);
  font-weight: 600;
}
.timeline-content p {
  font-size: .855rem;
  color: var(--color-text-light);
  line-height: 1.95;
  letter-spacing: .03em;
}
.timeline-tag {
  display: inline-block;
  margin-top: .8rem;
  font-size: .72rem;
  color: var(--color-gold);
  border: 1px solid rgba(184,150,92,.4);
  padding: .15rem .65rem;
  border-radius: 20px;
  letter-spacing: .08em;
}

/* ---- お問い合わせセクション ---- */
.contact-section {
  background: var(--color-dark-soft);
  padding: clamp(4rem, 10vw, 7rem) 0;
  color: var(--color-ivory);
}
.contact-section .section-title { color: var(--color-ivory); }
.contact-section .section-desc  { color: rgba(255,255,255,.6); }

.contact-wrapper {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3.5rem;
  align-items: start;
}
.contact-info {
  display: flex;
  flex-direction: column;
  gap: 1.8rem;
}
.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: 1.1rem;
}
.contact-info-item i {
  font-size: 1.1rem;
  color: var(--color-gold);
  margin-top: .2rem;
  flex-shrink: 0;
}
.contact-info-item strong {
  display: block;
  font-size: .88rem;
  letter-spacing: .08em;
  margin-bottom: .35rem;
  color: var(--color-gold-light);
}
.contact-info-item p {
  font-size: .82rem;
  color: rgba(255,255,255,.6);
  line-height: 1.85;
  letter-spacing: .03em;
}
.contact-crest {
  margin-top: 1rem;
  text-align: center;
  padding: 2rem 0;
  border-top: 1px solid rgba(184,150,92,.2);
}
.contact-crest span {
  font-family: var(--font-serif-jp);
  font-size: 5rem;
  color: rgba(184,150,92,.25);
  line-height: 1;
  display: block;
}

/* ---- フォーム ---- */
.contact-form {
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(184,150,92,.2);
  border-radius: var(--radius-lg);
  padding: 2.8rem;
}
.form-group {
  margin-bottom: 1.6rem;
}
.form-group label {
  display: flex;
  align-items: center;
  gap: .55rem;
  font-size: .83rem;
  letter-spacing: .08em;
  color: rgba(255,255,255,.75);
  margin-bottom: .55rem;
  font-family: var(--font-serif-jp);
}
.required-badge {
  display: inline-block;
  font-size: .66rem;
  padding: .12rem .5rem;
  background: rgba(184,150,92,.3);
  color: var(--color-gold-light);
  border-radius: 3px;
  letter-spacing: .05em;
  font-weight: 400;
  border: 1px solid rgba(184,150,92,.4);
}
.form-group input,
.form-group textarea {
  width: 100%;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(184,150,92,.25);
  border-radius: var(--radius-sm);
  padding: .85rem 1.1rem;
  font-size: .9rem;
  color: rgba(255,255,255,.9);
  letter-spacing: .04em;
  outline: none;
  transition: border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
  font-family: var(--font-serif-jp);
}
.form-group input::placeholder,
.form-group textarea::placeholder {
  color: rgba(255,255,255,.25);
  font-weight: 300;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-gold);
  background: rgba(184,150,92,.06);
  box-shadow: 0 0 0 3px rgba(184,150,92,.12);
}
.form-group input.error,
.form-group textarea.error {
  border-color: #e07070;
  background: rgba(224,112,112,.05);
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-error {
  display: block;
  font-size: .75rem;
  color: #e07070;
  margin-top: .35rem;
  letter-spacing: .04em;
  min-height: 1em;
  font-family: var(--font-sans-jp);
}
.form-submit {
  text-align: center;
  margin-top: 2rem;
}
.btn-submit {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  padding: 1rem 3.5rem;
  background: linear-gradient(135deg, var(--color-gold-light), var(--color-gold));
  color: var(--color-dark);
  font-family: var(--font-serif-jp);
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .35em;
  border-radius: var(--radius-sm);
  border: none;
  cursor: pointer;
  transition: all var(--transition-mid);
  box-shadow: var(--shadow-gold);
  position: relative;
  overflow: hidden;
}
.btn-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.2), transparent);
  opacity: 0;
  transition: opacity var(--transition-fast);
}
.btn-submit:hover:not(:disabled) { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(184,150,92,.45); }
.btn-submit:hover:not(:disabled)::before { opacity: 1; }
.btn-submit:disabled { opacity: .55; cursor: not-allowed; }
.btn-submit .btn-icon { font-size: .8rem; }

.form-success, .form-error-global {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  border-radius: var(--radius-md);
  padding: 1.3rem 1.6rem;
  margin-top: 1.4rem;
  font-size: .88rem;
  line-height: 1.85;
  letter-spacing: .03em;
}
.form-success {
  background: rgba(80,180,120,.12);
  border: 1px solid rgba(80,180,120,.3);
  color: #7ecfa0;
}
.form-success i  { font-size: 1.2rem; color: #7ecfa0; flex-shrink: 0; margin-top: .15rem; }
.form-error-global {
  background: rgba(220,100,100,.12);
  border: 1px solid rgba(220,100,100,.3);
  color: #e09090;
}
.form-error-global i { font-size: 1.2rem; color: #e09090; flex-shrink: 0; margin-top: .15rem; }

/* ---- フッター ---- */
#site-footer {
  background: var(--color-dark);
  border-top: 1px solid rgba(184,150,92,.15);
  padding: 3rem 0 2rem;
}
.footer-inner {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 clamp(1.25rem, 5vw, 2.5rem);
  text-align: center;
}
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: .8rem;
  margin-bottom: 1.5rem;
}
.footer-kanji {
  font-family: var(--font-serif-jp);
  font-size: 2.2rem;
  color: var(--color-gold);
  line-height: 1;
}
.footer-name {
  display: block;
  font-family: var(--font-serif-jp);
  font-size: .85rem;
  color: rgba(255,255,255,.75);
  letter-spacing: .15em;
}
.footer-name-en {
  display: block;
  font-family: var(--font-en);
  font-size: .7rem;
  color: rgba(255,255,255,.35);
  letter-spacing: .25em;
  margin-top: .1rem;
}
.footer-nav {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: .2rem;
  margin-bottom: 1.5rem;
}
.footer-nav a {
  font-size: .78rem;
  color: rgba(255,255,255,.5);
  letter-spacing: .1em;
  transition: color var(--transition-fast);
  padding: .2rem .5rem;
}
.footer-nav a:hover { color: var(--color-gold-light); }
.footer-sep { color: rgba(255,255,255,.2); font-size: .7rem; }
.footer-copy {
  font-size: .72rem;
  color: rgba(255,255,255,.25);
  letter-spacing: .1em;
}

/* ---- ページトップ ---- */
#page-top {
  position: fixed;
  bottom: 2.2rem;
  right: 2rem;
  width: 46px;
  height: 46px;
  background: var(--color-dark-mid);
  border: 1px solid rgba(184,150,92,.4);
  border-radius: 50%;
  color: var(--color-gold);
  font-size: .9rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-mid);
  opacity: 0;
  transform: translateY(20px);
  pointer-events: none;
  z-index: 800;
  box-shadow: var(--shadow-sm);
}
#page-top.visible { opacity: 1; transform: translateY(0); pointer-events: auto; }
#page-top:hover { background: var(--color-gold); color: var(--color-dark); border-color: var(--color-gold); }

/* ---- AOS (Intersection Observer) アニメーション ---- */
[data-aos] {
  opacity: 0;
  transition: opacity .75s ease, transform .75s ease;
}
[data-aos="fade-up"]    { transform: translateY(30px); }
[data-aos="fade-right"] { transform: translateX(-30px); }
[data-aos="fade-left"]  { transform: translateX(30px); }
[data-aos="fade-in"]    { transform: none; }
[data-aos].aos-animate  { opacity: 1; transform: none; }

/* ---- レスポンシブ ---- */
@media (max-width: 960px) {
  .about-cards {
    grid-template-columns: 1fr 1fr;
  }
  .contact-wrapper {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
  .contact-crest { display: none; }
  .timeline::before { left: 72px; }
  .timeline-item { grid-template-columns: 72px 1fr; gap: 1.8rem; }
}
@media (max-width: 768px) {
  :root { --header-height: 60px; }
  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0; right: 0;
    background: rgba(26,21,16,.97);
    backdrop-filter: blur(8px);
    flex-direction: column;
    padding: 2rem 1.5rem 2.5rem;
    gap: 1.2rem;
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
    transition: transform var(--transition-mid), opacity var(--transition-mid);
    border-bottom: 1px solid rgba(184,150,92,.2);
  }
  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .nav-links li a { font-size: 1rem; }
  .nav-toggle { display: flex; }
  .about-cards { grid-template-columns: 1fr; max-width: 420px; margin: 0 auto; }
  .purpose-item { grid-template-columns: 44px 1fr; gap: 1.2rem; padding: 1.4rem 1.4rem; }
  .purpose-num { font-size: 1.6rem; }
  .timeline::before { left: 56px; }
  .timeline-item { grid-template-columns: 56px 1fr; gap: 1.2rem; }
  .timeline-year { font-size: .85rem; }
  .contact-form { padding: 1.8rem 1.4rem; }
  .hero-ornament { width: 100px; height: 100px; }
  .pc-only { display: none; }
  .purpose-quote { padding: 1.8rem 1.6rem 1.4rem; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 5.5rem; }
  .timeline-item { grid-template-columns: 48px 1fr; gap: 1rem; }
  .timeline-year { font-size: .78rem; }
  .timeline-dot { width: 8px; height: 8px; }
}