/* ===== ABOUT ページ専用 ===== */
body{ background:#f3f3f3; }
.br-sp{ display:none; }
.br-pc{ display:inline; }
@media (max-width:768px){
  .br-sp{ display:inline; }
  .br-pc{ display:none; }
}

.about-main{ padding-bottom: 70px; }

/* HERO */
.about-hero{
  position: relative;
  color:#fff;
  overflow:hidden;
  padding: 74px 18px 58px;
}

.about-hero-bg{
  position:absolute;
  inset:0;
  background:
    radial-gradient(circle at 20% 20%, rgba(255,79,216,0.25), transparent 45%),
    radial-gradient(circle at 80% 25%, rgba(120,200,255,0.22), transparent 45%),
    linear-gradient(180deg, #0b0b14 0%, #121225 60%, #0b0b14 100%);
  filter: saturate(1.05);
}

.about-hero::after{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(to bottom, rgba(0,0,0,0.35), rgba(0,0,0,0.55));
}

.about-hero-inner{
  position:relative;
  z-index:2;
  max-width: 1100px;
  margin: 0 auto;
  text-align:center;
}

.about-badge{
  display:inline-block;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.55);
  letter-spacing: 0.18em;
  font-weight: 900;
  font-size: 0.85rem;
  margin-bottom: 12px;
}

.about-title{
  margin: 0 0 10px;
  font-size: 2.35rem;
  letter-spacing: .04em;
  text-shadow: 0 10px 30px rgba(0,0,0,0.35);
}

.about-lead{
  margin: 0 auto;
  max-width: 820px;
  line-height: 1.9;
  opacity: .92;
}

/* CTA */
.about-cta{
  display:flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 18px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 12px 18px;
  border-radius: 999px;
  text-decoration:none;
  font-weight: 900;
  letter-spacing: 0.04em;
  transition: transform .2s ease, box-shadow .2s ease, filter .2s ease, background .2s ease;
}

.btn:hover{
  transform: translateY(-1px);
  box-shadow: 0 12px 22px rgba(0,0,0,0.28);
}

.btn-primary{
  background: linear-gradient(135deg, #ff3f8f, #8f6cff);
  color:#fff;
}

.btn-ghost{
  background: rgba(255,255,255,0.14);
  border: 1px solid rgba(255,255,255,0.55);
  color:#fff;
}

/* セクション共通 */
.about-section{
  max-width: 1100px;
  margin: 34px auto 0;
  padding: 0 20px;
}

.section-head{
  text-align:center;
  margin-bottom: 16px;
}

.section-head h2{
  margin: 0 0 8px;
  font-size: 1.6rem;
}

.section-head p{
  margin:0;
  color:#444;
}

/* 価値カード */
.about-values{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.value-card{
  background:#fff;
  border-radius: 16px;
  padding: 18px 16px;
  box-shadow: 0 10px 22px rgba(0,0,0,0.10);
  border: 1px solid rgba(0,0,0,0.05);
}

.value-card h3{
  margin: 0 0 8px;
  font-size: 1.05rem;
}

.value-card p{
  margin:0;
  color:#444;
  line-height: 1.75;
}

/* タイムライン */
.timeline{
  display:grid;
  gap: 14px;
}

.timeline-item{
  background:#fff;
  border-radius: 18px;
  overflow:hidden;
  box-shadow: 0 10px 24px rgba(0,0,0,0.10);
  border: 1px solid rgba(0,0,0,0.05);
  display:grid;
  grid-template-columns: 120px 1fr;
}

.timeline-year{
  background: linear-gradient(180deg, rgba(255,79,216,0.18), rgba(120,200,255,0.12));
  display:flex;
  align-items:center;
  justify-content:center;
  font-weight: 900;
  letter-spacing: .08em;
  font-size: 1.05rem;
  color:#111;
}

.timeline-body{
  padding: 18px 16px 16px;
}

.timeline-body h3{
  margin: 0 0 8px;
  font-size: 1.15rem;
}

.timeline-body p{
  margin:0 0 12px;
  color:#444;
  line-height: 1.8;
}

.timeline-media{
  display:grid;
  gap: 10px;
}

.timeline-media img{
  width:100%;
  border-radius: 14px;
  display:block;
  object-fit: cover;
  aspect-ratio: 16 / 9;
}

.timeline-media.grid2{
  grid-template-columns: 1fr 1fr;
}

/* メッセージ */
.message-card{
  background: linear-gradient(135deg, rgba(255,79,216,0.10), rgba(140,123,255,0.10));
  border: 1px solid rgba(0,0,0,0.06);
  border-radius: 18px;
  padding: 22px 18px;
  box-shadow: 0 10px 22px rgba(0,0,0,0.08);
  text-align:center;
}

.message-card h2{
  margin: 0 0 10px;
  font-size: 1.5rem;
}

.message-card p{
  margin: 0;
  line-height: 1.9;
  color:#222;
}

.message-actions{
  display:flex;
  gap: 12px;
  justify-content:center;
  flex-wrap: wrap;
  margin-top: 16px;
}

/* ギャラリー */
.about-gallery{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.about-photo{
  margin:0;
  border-radius: 16px;
  overflow:hidden;
  box-shadow: 0 10px 22px rgba(0,0,0,0.12);
}

.about-photo img{
  width:100%;
  display:block;
  object-fit: cover;
  aspect-ratio: 4 / 3;
  transition: transform .3s ease;
}

.about-photo:hover img{
  transform: scale(1.03);
}

/* レスポンシブ */
@media (max-width: 900px){
  .about-values{ grid-template-columns: 1fr; }
  .about-gallery{ grid-template-columns: repeat(2, 1fr); }
  .timeline-item{ grid-template-columns: 100px 1fr; }
}

@media (max-width: 768px){
  .about-title{ font-size: 1.95rem; }
  .btn{ width: 100%; }
  .timeline-item{ grid-template-columns: 1fr; }
  .timeline-year{ padding: 10px 0; }
  .timeline-media.grid2{ grid-template-columns: 1fr; }
}

@media (max-width: 520px){
  .about-gallery{ grid-template-columns: 1fr; }
}


/* ====== ヘッダー（PCデフォルト表示） ====== */
.site-header {
  background-color: #222;
  padding: 10px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  position: relative;
}

.site-header .logo {
  height: 40px;
}

.main-nav {
  display: flex;
  align-items: center;
}

.main-nav a {
  color: white;
  text-decoration: none;
  margin-left: 15px;
  font-weight: bold;
}

.main-nav a:hover {
  text-decoration: underline;
}

/* ハンバーガー */
.hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}
.hamburger span {
  background: white;
  height: 3px;
  margin: 4px 0;
  width: 25px;
}
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }
  .main-nav {
    display: none;
    flex-direction: column;
    background: #222;
    position: absolute;
    top: 60px;
    left: 0;
    width: 100%;
    text-align: center;
  }
  .main-nav.active {
    display: flex;
  }
  .main-nav a {
    padding: 10px 0;
  }
}


/* サイトマップ */
.footer-sitemap {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 20px;
  padding: 30px 20px;
  color: #fff;
  background: #111;
}

.footer-sitemap h4 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: #ffffff;
  letter-spacing: 0.07em;
}

.footer-sitemap ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.footer-sitemap li {
  margin-bottom: 6px;
}

.footer-sitemap a {
  color: rgba(255,255,255,0.85);
  text-decoration: none;
  font-size: 0.9rem;
}

.footer-sitemap a:hover {
  text-decoration: underline;
  color: #ffd768; /* ホバーを少し黄色にして統一感UP */
}

@media (max-width: 768px) {
  .footer-sitemap {
    grid-template-columns: 1fr 1fr;
    gap: 25px 10px;
  }
}