:root{
  --navy:#0f1c2e;
  --navy-deep:#0a1422;
  --white:#ffffff;
  --accent:#d4af37;
}

*{box-sizing:border-box;}

body{
  margin:0;
  font-family:-apple-system,BlinkMacSystemFont,"Hiragino Sans","Yu Gothic",Meiryo,sans-serif;
  background:var(--navy);
  color:var(--white);
}

/* 共通 */
.container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}

/* ========================
   ヘッダー
======================== */
.header{
  position:fixed;
  width:100%;
  top:0;
  left:0;
  background:rgba(15,28,46,0.95);
  backdrop-filter:blur(10px);
  z-index:100;
}

.header-inner{
  display:flex;
  justify-content:space-between;
  align-items:center;
  height:70px;
}

.logo{
  font-weight:700;
  letter-spacing:.05em;
}

.nav{
  display:flex;
  gap:28px;
  align-items:center;
}

.nav a{
  color:var(--white);
  text-decoration:none;
  font-size:14px;
  transition:.3s;
}

.nav a:hover{
  opacity:.7;
}

.cta{
  padding:8px 16px;
  border:1px solid var(--accent);
  border-radius:30px;
  color:var(--accent);
}

.cta:hover{
  background:var(--accent);
  color:var(--navy);
}

/* ========================
   ヒーロー
======================== */
.hero{
  height:100vh;
  background:
    linear-gradient(rgba(10,20,34,0.65), rgba(10,20,34,0.65)),
    url("img/top1.jpg") center center / cover no-repeat;
  background-color:var(--navy-deep);
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding-top:70px;
}

.hero-overlay{
  max-width:900px;
  padding:0 20px;
}

/* リニューアル表示 */
.renewal-bar{
  display:inline-block;
  margin-bottom:24px;
  padding:8px 20px;
  font-size:14px;
  letter-spacing:.08em;
  border:1px solid var(--accent);
  border-radius:30px;
  color:var(--accent);
  background:rgba(0,0,0,0.35);
}

/* 見出し */
.hero h1{
  font-size:clamp(30px,5vw,54px);
  margin-bottom:20px;
  font-weight:600;
}

.lead{
  font-size:18px;
  margin-bottom:40px;
  opacity:.9;
}

/* 問い合わせボタン */
.hero-contact{
  display:flex;
  flex-direction:column;
  gap:16px;
  margin-bottom:30px;
}

.btn{
  padding:18px 28px;
  border-radius:40px;
  text-decoration:none;
  font-weight:600;
  font-size:16px;
  transition:.3s;
}

.primary{
  background:var(--accent);
  color:var(--navy);
}

.primary:hover{
  opacity:.85;
}

.secondary{
  border:2px solid var(--white);
  color:var(--white);
}

.secondary:hover{
  background:var(--white);
  color:var(--navy);
}

.contact-info{
  font-size:14px;
  opacity:.85;
}

/* フッター */
.footer{
  text-align:center;
  padding:40px 20px;
  font-size:12px;
  background:var(--navy-deep);
}

/* PCレイアウト */
@media(min-width:768px){

  .hero-contact{
    flex-direction:row;
    justify-content:center;
  }

  .btn{
    min-width:260px;
  }

}