/* ===== Theme ===== */
:root{
  --header-h: 72px;
  --bg: #000000;
  --fg: #f4f7fb;
  --muted: #a4b1bd;
  --accent: #4fc3f7;
  --accent-ink:#7dd3fc;
  --surface:#0b0f12;
  --card:#0e1319;
  --border: rgba(255,255,255,.08);
  --radius: 16px;
  --shadow: 0 14px 40px rgba(0,0,0,.6);
}

*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;
  color:var(--fg);
  background:var(--bg);
  font-family:'Noto Serif JP','Yu Mincho','Hiragino Mincho ProN',serif;
  line-height:1.85;
}

/* Links（下線なし・太字・色強調） */
a{ text-decoration:none; font-weight:700; color:var(--accent-ink); }
a:hover{ color:var(--accent); }

/* ===== Header ===== */
.site-header{
  position:fixed; inset:0 0 auto 0; height:var(--header-h);
  backdrop-filter:saturate(160%) blur(10px);
  background:rgba(7,10,12,.65);
  border-bottom:1px solid var(--border);
  z-index:50;
}
.site-header .inner{
  max-width:1200px; margin:0 auto; height:100%;
  display:flex; align-items:center; justify-content:space-between;
  padding:0 16px;
}
.brand{ font-weight:900; letter-spacing:.06em; color:#fff; font-size:20px; }
.brand span{ color:var(--accent-ink); }
.main-nav a{
  display:inline-block; margin-left:18px; font-weight:700; font-size:14px;
  color:#fff; position:relative; padding:8px 4px; opacity:.92;
}
.main-nav a.active,.main-nav a:hover{ color:var(--accent-ink); opacity:1; }
.main-nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:2px;
  background:var(--accent); transform:scaleX(0); transform-origin:left; transition:transform .25s;
}
.main-nav a:hover::after,.main-nav a.active::after{ transform:scaleX(1); }

/* ===== Hero ===== */
.hero{ margin-top:var(--header-h); height:calc(100vh - var(--header-h));
  position:relative; overflow:hidden; background:#000; }
.hero-slides{ width:100%; height:100%; position:relative; }
.hero-slide{
  position:absolute; inset:0; display:flex; align-items:flex-end; justify-content:flex-start;
  padding:40px; color:#fff; background-size:cover; background-position:center;
  opacity:0; transform:scale(1.02); transition:opacity .6s, transform .8s; cursor:pointer;
}
.hero-slide.active{ opacity:1; transform:scale(1); }
.hero-slide::before{ content:""; position:absolute; inset:0;
  background:linear-gradient(to top, rgba(0,0,0,.65), rgba(0,0,0,.1) 50%, rgba(0,0,0,0)); }
.hero-slide .caption{ position:relative; z-index:1; max-width:900px; }
.hero-slide h2{ font-size:clamp(28px,4vw,48px); margin:0 0 8px; line-height:1.15; }
.hero-slide p{ margin:0; color:#e0f6ff; }
.hero-arrow{
  position:absolute; top:50%; transform:translateY(-50%);
  width:54px; height:54px; border-radius:50%; border:1px solid rgba(255,255,255,.35);
  color:#fff; background:rgba(0,0,0,.45); display:grid; place-items:center; z-index:2; cursor:pointer;
}
.hero-arrow:hover{ background:rgba(0,0,0,.6) }
.hero-arrow.left{ left:16px } .hero-arrow.right{ right:16px }
.hero-dots{ position:absolute; left:0; right:0; bottom:14px; display:flex; gap:8px; justify-content:center; z-index:2;}
.hero-dots button{ width:9px; height:9px; border-radius:50%; border:none; background:#3f97b5; opacity:.5;}
.hero-dots button.active{ opacity:1; background:var(--accent) }

/* ===== Sections ===== */
.section{
  padding:120px 0;             /* 余白を拡大 */
  background:transparent;
  scroll-margin-top: calc(var(--header-h) + 32px); /* アンカー時のかぶり防止 */
}
.section .container{ max-width:1200px; margin:0 auto; padding:0 16px }
.section-title{
  display:inline-block; font-size:28px; margin:0 0 22px; padding-bottom:12px;
  border-bottom:3px solid var(--accent);
}

/* 1200x372 Banner */
.section-banner{
  width:100%; max-width:1200px; height:372px;
  margin:12px auto 34px; border-radius:18px; border:1px solid var(--border);
  box-shadow:var(--shadow); background-size:cover; background-position:center;
}

/* ===== Cards / Surfaces ===== */
.about-card,.recruit-card,.member-card,.news-card,.corp-card,.sponsor-card{
  background:var(--card); border:1px solid var(--border); border-radius:var(--radius);
  box-shadow:var(--shadow);
}
.about-card{ padding:32px 36px; }
.about-card p{ line-height:2; letter-spacing:.02em; }

/* ===== News ===== */
.news-list, .news-archive{ display:grid; grid-template-columns:repeat(3,1fr); gap:18px; }
.news-card .thumb{ aspect-ratio:16/9; background:#111 center/cover no-repeat; border-top-left-radius:16px; border-top-right-radius:16px; }
.news-card .body{ padding:18px 20px }
.news-card .title{ margin:0 0 10px; font-size:18px }
.news-card .meta{ color:var(--muted); font-size:12px; margin:0 0 12px }
.news-card a.more{ font-weight:800 }

/* ===== Followers ===== */
.followers-note{ color:var(--muted); margin-bottom:6px }
.followers-total{
  font-weight:900; font-size:clamp(36px,7vw,72px);
  border-left:6px solid var(--accent); padding-left:16px; margin:8px 0 18px;
}

/* ===== Partners ===== */
.sponsor-person-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:16px; }
.sponsor-card{ padding:22px; text-align:center; }
.sponsor-avatar{
  width:120px; height:120px; border-radius:50%; margin:0 auto 12px;
  background:#0b1b24 center/cover no-repeat; border:3px solid var(--accent);
}
.sponsor-name{ margin:8px 0 4px; font-weight:900; color:#fff; }
.sponsor-x a, .sponsor-x span{ color:#fff; font-weight:700; }

/* 企業スポンサー CTA */
.corp-sponsor-cta{ margin-top:8px; }
.corp-card{
  display:flex; justify-content:space-between; align-items:center;
  padding:20px 22px; text-decoration:none; color:var(--fg);
}
.corp-title{ font-weight:900; font-size:18px }
.corp-desc{ color:var(--muted) }
.corp-arrow{ font-weight:900; }

/* ===== Recruit ===== */
.recruit-grid{ display:grid; grid-template-columns:1fr 1fr; gap:22px; margin-bottom:22px; }
.recruit-card{ padding:28px 32px; line-height:2; }
.recruit-sub{ margin:18px 0 8px; font-size:16px; color:#dff6ff }
.bullets{ margin:0; padding-left:22px } .bullets li{ margin:8px 0 }
.mb-8{ margin-bottom:8px }
/* フル幅CTAボタン（左右端を揃える） */
.recruit-cta{ max-width:1200px; margin:0 auto; padding:0 16px; }
.btn-wide{ display:block; width:100%; text-align:center; padding:18px 28px; border-radius:14px; }

/* ===== Members ===== */
.tabs{ display:flex; gap:8px; margin:10px 0 18px }
.tabs button{
  border:1px solid var(--border); background:#0b0f12; color:#fff;
  border-radius:999px; padding:8px 14px; cursor:pointer; font-weight:700;
}
.tabs button.active{ border-color:var(--accent); box-shadow:0 0 0 4px rgba(79,195,247,.15); }
.members-grid{ display:grid; grid-template-columns:repeat(5,1fr); gap:16px; }
.member-card{ padding:18px; text-align:center; }
.member-avatar{
  width:120px; height:120px; border-radius:50%; margin:0 auto 10px;
  background:#0b1b24 center/cover no-repeat; border:3px solid var(--accent);
}
.member-name{ margin:6px 0 4px; font-weight:900 }
.member-role{ margin:0 0 8px; color:var(--muted) }
.member-x a{ word-break:break-all }

/* ===== Buttons / Utils ===== */
.btn{
  display:inline-block; border-radius:12px; padding:12px 18px; cursor:pointer;
  color:#001219; background:var(--accent); border:1px solid transparent; font-weight:800;
  box-shadow:var(--shadow);
}
.btn.ghost{ background:transparent; color:var(--accent-ink); border-color:var(--accent) }
.btn.tiny{ padding:6px 10px; font-size:12px }
.center{ text-align:center } .mt-24{ margin-top:24px }
.subheading{ margin:10px 0 8px; color:#d5eefe }

/* ===== Footer ===== */
.site-footer{ border-top:1px solid var(--border); padding:30px 0; background:#070a0d }
.site-footer .inner{ max-width:1200px; margin:0 auto; padding:0 16px }
.site-footer .hashtag:hover{ text-decoration:underline }

/* ===== Responsive ===== */
@media (max-width: 1024px){
  .news-list, .news-archive{ grid-template-columns:1fr 1fr }
  .sponsor-person-grid{ grid-template-columns:repeat(3,1fr) }
  .recruit-grid{ grid-template-columns:1fr }
  .members-grid{ grid-template-columns:repeat(3,1fr) }
}
@media (max-width: 640px){
  .news-list, .news-archive{ grid-template-columns:1fr }
  .sponsor-person-grid{ grid-template-columns:repeat(2,1fr) }
  .members-grid{ grid-template-columns:repeat(2,1fr) }
  .member-avatar,.sponsor-avatar{ width:96px; height:96px }
}

.brand-logo{
  display:block;
  height:32px;                /* 高さだけ指定して比率維持 */
  width:auto;
  filter:none;                /* 白ロゴ想定。黒ロゴ使用時はfilter: invert(1); 等で調整可能 */
}

@media (max-width:640px){
  .brand-logo{ height:28px; }
}

.brand{ display:flex; align-items:center; gap:10px; }
.brand-logo{ display:block; height:32px; width:auto; }
.brand-text{ display:none; color:#fff; font-weight:900; letter-spacing:.06em; }
@media (max-width:640px){ .brand-logo{ height:28px; } }

.news-card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:var(--radius);
  box-shadow:var(--shadow);
  overflow:hidden;                 /* 角丸に合わせて切り抜き */
}
.news-card .thumb{
  display:block;
  aspect-ratio:16/9;
  background:#111 center/cover no-repeat;
}
.news-card .body{ display:none !important; } /* 旧：本文/日付/続きを読む を隠す */
.news-card .title{ display:none !important; }/* 旧：タイトル（.body内）も隠す */

.news-title{                        /* 新：カード下のタイトル */
  display:block;
  padding:14px 16px 16px;
  font-size:18px;
  color:#fff;
}
.news-title:hover{ color:var(--accent-ink); }