/* ============================= */
/* --- 全体の基本設定 --- */
/* ============================= */
:root {
  --bg: #fff;          /* 背景色 */
  --text: #111;        /* 基本文字色 */
  --muted: #6b6b6b;    /* 薄い文字色 */
  --accent: #1a1a1a;   /* 強調文字色 */
  --container: 1100px; /* 最大幅 */
  font-family: 'Noto Sans JP', sans-serif;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 20px;
  text-align: center;
}

/* ============================= */
/* --- ヘッダー --- */
/* ============================= */
.site-header {
  position: sticky;
  top: 0;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(6px);
  border-bottom: 1px solid #eee;
  z-index: 40;
}

.header-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 68px;
}

.logo {
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--accent);
  text-decoration: none;
}

.site-nav ul {
  display: flex;
  gap: 18px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.site-nav a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 500;
}


/*==================== ハンバーガーメニュー ===================*/

@media screen and (max-width:1000px) {

  /* ナビ本体（隠れている状態） */
  #site-nav {
      position: fixed;
      top: 0;
      left: -120%;           /* ← right ではなく left に */
      right: -120%;           
      width: 100%;
      height: 100vh;
      background: #ffffff;
      transition: all 0.6s;
      z-index: 100;
      opacity: 0;
      pointer-events: none;
  }

  #site-nav.panelactive {
      left: 0;               /* ← こっちにスライドイン */
      opacity: 1;            /* ← 透明解除 */
      pointer-events: auto;  /* ← クリック可能 */
  }

  #site-nav ul {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      display: flex;
      flex-direction: column;
      gap: 20px;
      text-align: center;
  }

  #site-nav li a {
      color: #111;
      font-size: 1.3rem;
      text-decoration: none;
      letter-spacing: 0.1em;
  }

  /* ハンバーガー本体 */
  .openbtn {
      position: absolute;
      right: 20px;
      top: 14px;
      cursor: pointer;
      width: 45px;
      height: 45px;
      z-index: 300;
  }

  .openbtn span {
      position: absolute;
      left: 8px;
      width: 60%;
      height: 3px;
      background: #111;
      border-radius: 2px;
      transition: 0.4s;
  }

  .openbtn span:nth-of-type(1) { top: 12px; }
  .openbtn span:nth-of-type(2) { top: 21px; }
  .openbtn span:nth-of-type(3) { top: 30px; }

  /* × に変化 */
  .openbtn.active span:nth-of-type(1) {
      transform: rotate(45deg);
      top: 21px;
  }
  .openbtn.active span:nth-of-type(2) {
      opacity: 0;
  }
  .openbtn.active span:nth-of-type(3) {
      transform: rotate(-45deg);
      top: 21px;
  }
}




/**********************************************
初めての方 説明セクション
**********************************************/

.first-explain {
  background-color: #f5f8f7;
  padding: 120px 0;
}

.explain-body {
  max-width: 720px;
  margin: 0 auto;
  font-size: 1rem;
  line-height: 2;
  color: #222;
}

/* リード文 */
.explain-lead {
  font-size: 1.05rem;
  margin-bottom: 60px;
}

/* 見出し */
.explain-body h3 {
  font-size: 1.15rem;
  font-weight: 600;
  margin: 60px 0 20px;
  color: #2f4a1d;
}

/* 箇条書き */
.explain-list {
  list-style: none;
  padding-left: 0;
  margin: 20px 0 30px;
}

.explain-list li {
  margin-bottom: 10px;
  padding-left: 0;
}

/* 限定オファー */
.explain-offer {
  margin: 80px 0 60px;
  text-align: center;
}

.offer-title {
  letter-spacing: 0.2em;
  font-size: 1.2rem;
  color: red;
}

.offer-price {
  font-size: 1.3rem;
  margin: 10px 0;
}

.offer-price strong {
  font-size: 1.9rem;
  color: #2f4a1d;
}

.offer-note {
  font-size: 0.85rem;
  color: #555;
}

/* CTA */
.explain-cta {
  text-align: center;
    padding-top: 40px;
}

.explain-cta .cta-btn {
  display: inline-block;
  padding: 18px 48px;
  background: #111;
  color: #fff;
  text-decoration: none;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.3s;
}

.explain-cta .cta-btn:hover {
  opacity: 0.85;
  transform: translateY(-2px);
}

.cta-note {
  margin-top: 12px;
  font-size: 0.8rem;
  color: #666;
}




.first-explain img {
  display: block;
  margin: 0 auto;
  max-width: 100%;
  width: 100%;
  height: auto;
  border-radius: 16px;
  overflow: hidden;
}



.first-campaign .campaign-label {
  font-size: 1.7rem;
  font-weight: 900;
  color: #3f5c22;
  margin-bottom: 30px;
  
}

@media (max-width: 768px) {
  .first-explain img {
    width: 100vw;
    max-width: 100vw;
    margin-left: calc(50% - 50vw);
    margin-right: calc(50% - 50vw);
    border-radius: 0; /* ← 端まで使うなら角丸なしが自然 */
  }
}



/* ============================= */
/* --- ホームに戻るボタン --- */
/* ============================= */
.back-home {
  text-align: center;
  margin: 30px 0;
}

.back-home .home-btn {
  display: inline-block;
  background: rgba(173,216,230,0.2);
  color: #111;
  padding: 10px 20px;
  border-radius: 20px;
  text-decoration: none;
  font-weight: 500;
  transition: 0.3s;
}

.back-home .home-btn:hover {
  background: rgba(173,216,230,0.4);
}

/* ============================= */
/* --- フッター --- */
/* ============================= */
.site-footer {
  background: #111;
  color: #fff;
  padding: 20px 0;
  font-size: 0.9rem;
  text-align: center;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
}

.footer-links {
  list-style: none;
  display: flex;
  gap: 16px;
  padding: 0;
  margin: 0;
}

.footer-links a {
  color: #fff;
  text-decoration: none;
}

.footer-links a:hover { text-decoration: underline; }