/* ===== 基本設定 ===== */
*{
  margin:0;
  padding:0;
  box-sizing:border-box;
}

html{
  scroll-behavior:smooth;
}

body{
  font-family:'Noto Sans JP',sans-serif;
  line-height:1.7;
  color:#222;
  background:#f4f6f9;
  overflow-x:hidden;
}

/* ===== ナビ（ガラス風） ===== */
#mainmenu{
  position:fixed;
  width:100%;
  top:0;
  z-index:1000;
  background:rgba(255, 255, 255, 0.05);
  backdrop-filter:blur(12px);
  transition:.4s ease;
}

#mainmenu.scrolled{
  background:rgba(0,43,85,0.9);
}

#menu{
  display:flex;
  justify-content:center;
  list-style:none;
  padding:1.2rem;
}

#menu li{margin:0 1.2rem;}

#menu a{
  position:relative;
  color:#fff;
  text-decoration:none;
  font-weight:500;
  padding:.5rem 0;
  transition:.3s;
}

/* 下線アニメーション */
#menu a::after{
  content:"";
  position:absolute;
  left:0;
  bottom:-4px;
  width:0%;
  height:2px;
  background:#fff;
  transition:.3s;
}

#menu a:hover::after{
  width:100%;
}

/* ===== HERO ===== */
.hero{
  position:relative;
  height:100vh;
  overflow:hidden;
}

.slideshow-container{
  height:100%;
}

.slides{
  display:flex;
  height:100%;
  transition:transform 1s ease-in-out;
}

.slide{
  min-width:100%;
  height:100%;
  object-fit:cover;
  animation:zoom 12s ease-in-out infinite;
}

/* ズームアニメーション */
@keyframes zoom{
  0%{transform:scale(1);}
  50%{transform:scale(1.1);}
  100%{transform:scale(1);}
}

.hero::after{
  content:"";
  position:absolute;
  inset:0;
  background:linear-gradient(to bottom,rgba(0,0,0,.3),rgba(0,0,0,.7));
}

.hero-overlay{
  position:absolute;
  top:50%;
  left:50%;
  transform:translate(-50%,-50%);
  text-align:center;
  color:#fff;
  z-index:10;
  animation:fadeUp 1.2s ease;
}

.hero-overlay h1{
  font-size:3.2rem;
  letter-spacing:.1em;
}

.hero-overlay p{
  margin-top:.8rem;
  font-size:1.3rem;
  opacity:.85;
}

/* ボタン */
.prev,.next{
  position:absolute;
  top:50%;
  transform:translateY(-50%);
  background:rgba(255,255,255,0.2);
  backdrop-filter:blur(8px);
  color:#fff;
  border:none;
  padding:14px;
  border-radius:50%;
  cursor:pointer;
  z-index:20;
  transition:.3s;
}

.prev:hover,.next:hover{
  background:#004b8d;
  transform:translateY(-50%) scale(1.1);
}

.prev{left:30px}
.next{right:30px}

/* ドット */
.dots{
  position:absolute;
  bottom:30px;
  width:100%;
  text-align:center;
  z-index:20;
}

.dots span{
  display:inline-block;
  width:12px;
  height:12px;
  margin:0 6px;
  background:rgba(255,255,255,.5);
  border-radius:50%;
  cursor:pointer;
  transition:.3s;
}

.dots .active{
  background:#fff;
  transform:scale(1.4);
}

/* ===== セクション ===== */
section{
  padding:5rem 1rem;
}

.container{
  max-width:1100px;
  margin:auto;
}

/* フェード */
.fade{
  opacity:0;
  transform:translateY(50px);
  transition:1s cubic-bezier(.23,1,.32,1);
}

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

/* ===== NEWS ===== */
#news{
  background:#fff;
  border-radius:20px;
  box-shadow:0 20px 50px rgba(0,0,0,.08);
  padding:2.5rem;
  transition:.4s;
}

#news:hover{
  transform:translateY(-5px);
  box-shadow:0 30px 60px rgba(0,0,0,.12);
}

#news h2{
  text-align:center;
  margin-bottom:2rem;
  color:#002b55;
  font-size:1.8rem;
}

#news li{
  padding:1rem 0;
  border-bottom:1px solid #eee;
  transition:.3s;
}

#news li:hover{
  transform:translateX(10px);
  color:#004b8d;
}

/* ===== GRID ===== */
#grid{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(250px,1fr));
  gap:2rem;
  list-style:none;
}

#grid a{
  display:block;
  padding:2.5rem;
  text-align:center;
  background:linear-gradient(135deg,#002b55,#004b8d);
  color:#fff;
  text-decoration:none;
  border-radius:20px;
  font-weight:600;
  transition:.5s;
  box-shadow:0 15px 35px rgba(0,0,0,.1);
  transform:translateY(0);
}

#grid a:hover{
  transform:translateY(-12px) rotateX(5deg);
  box-shadow:0 30px 60px rgba(0,0,0,.25);
}

/* ===== フッター ===== */
footer{
  background:linear-gradient(135deg,#002b55,#001933);
  color:#fff;
  padding:6rem 1rem;
  text-align:center;
}

footer h2{
  margin-bottom:1rem;
  font-size:1.6rem;
}

footer p{
  opacity:.85;
}

/* ===== アニメ ===== */
@keyframes fadeUp{
  from{opacity:0;transform:translate(-50%,-40%)}
  to{opacity:1;transform:translate(-50%,-50%)}
}

/* レスポンシブ */
@media(max-width:768px){
  .hero-overlay h1{font-size:2rem}
  #menu{flex-wrap:wrap}
}