@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@100..900&family=Noto+Serif+JP:wght@200..900&display=swap');

    :root{
      --bg:#fff7f0;
      --card:#ffffff;
      --ink:#0f172a;
      --muted:#475569;
      --line:#e2e8f0;

      --brand:#f97316;
      --brand2:#ef4444;
      --accent:#fb7185;
      --danger:#dc2626;

      --shadow: 0 14px 28px rgba(15,23,42,.10);
      --shadow2: 0 18px 40px rgba(15,23,42,.12);
      --radius: 18px;
      --max: 1120px;
    }

    *{ 
        font-family: "Noto Sans JP", sans-serif;
        box-sizing:border-box; }
    html{ scroll-behavior:smooth; }
    body{
      margin:0;
      font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Hiragino Kaku Gothic ProN", "Yu Gothic", "Noto Sans JP", Arial, sans-serif;
      color:var(--ink);
      background:
        radial-gradient(1200px 600px at 10% 0%, rgba(249,115,22,.12), transparent 60%),
        radial-gradient(900px 500px at 90% 10%, rgba(239,68,68,.10), transparent 55%),
        radial-gradient(900px 600px at 50% 100%, rgba(251,113,133,.08), transparent 55%),
        linear-gradient(180deg, var(--bg), #fff);
      line-height:1.75;
    }
    a{ color:inherit; }
    .wrap{ max-width:var(--max); margin:0 auto; padding:0 18px; }
    section{ padding: 34px 0; }
    .anchor{ scroll-margin-top: 88px; }

    /* Topbar */
    .topbar{
      position: sticky;
      top:0;
      z-index: 50;
      background: rgba(255,255,255,.86);
      backdrop-filter: blur(10px);
      border-bottom:1px solid var(--line);
    }
    .topbar .inner{
      display:flex;
      align-items:center;
      justify-content:space-between;
      gap:10px;
      padding: 12px 0;
      flex-wrap:wrap;
    }
    .logo{
      display:flex;
      gap:10px;
      align-items:center;
      text-decoration:none;
      font-weight: 900;
      letter-spacing:.02em;
    }
    .mark{
      width:34px; height:34px; border-radius:10px;
      background: linear-gradient(135deg, rgba(249,115,22,.98), rgba(239,68,68,.98));
      box-shadow: 0 10px 20px rgba(249,115,22,.20);
      flex: 0 0 auto;
    }
    .nav{
      display:flex;
      gap:10px;
      align-items:center;
      flex-wrap:wrap;
      color: var(--muted);
      font-weight: 800;
      font-size: 14px;
    }
    .nav a{
      text-decoration:none;
      padding:8px 10px;
      border-radius: 12px;
    }
    .nav a:hover{ background: rgba(15,23,42,.04); color: var(--ink); }

    /* Cards */
    .card{
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: var(--radius);
      box-shadow: var(--shadow);
    }
    .pad{ padding: 18px; }

    /* Buttons (3D) */
    .btn{
      display:inline-flex;
      align-items:center;
      justify-content:center;
      gap:.55em;
      padding: 14px 16px;
      border-radius: 14px;
      font-weight: 1000;
      text-decoration:none;

      border: 1px solid rgba(15,23,42,.10);
      background: #fff;
      color: var(--ink);

      box-shadow:
        0 14px 22px rgba(15,23,42,.12),
        0 2px 0 rgba(255,255,255,.65) inset;
      border-bottom: 4px solid rgba(15,23,42,.18);

      transform: translateY(0);
      transition: transform .12s ease, box-shadow .12s ease, filter .12s ease;
      cursor:pointer;
      white-space: nowrap;
    }
    .btn:hover{
      transform: translateY(-2px);
      box-shadow:
        0 18px 26px rgba(15,23,42,.16),
        0 2px 0 rgba(255,255,255,.75) inset;
      filter: brightness(1.01);
    }
    .btn:active{
      transform: translateY(2px);
      box-shadow:
        0 10px 16px rgba(15,23,42,.12),
        0 1px 0 rgba(255,255,255,.55) inset;
      border-bottom-width: 2px;
    }
    .btn:focus-visible{
      outline: 3px solid rgba(249,115,22,.30);
      outline-offset: 3px;
    }
    .btn.primary{
      border: none;
      color:#fff;
      background: linear-gradient(135deg, rgba(249,115,22,.98), rgba(239,68,68,.98));
      border-bottom: 4px solid rgba(17,24,39,.18);
    }
    .btn.primary:hover{ filter: brightness(1.03); }
    .btn.small{ padding: 10px 12px; border-radius: 12px; font-size: 14px; }

    /* Typography */
    h1{
      margin: 10px 0 10px;
      font-size: clamp(30px, 3.6vw, 46px);
      line-height: 1.18;
      letter-spacing: .01em;
    }
    .title{
      font-size: 24px;
      margin: 0 0 10px;
      letter-spacing:.01em;
    }
    .desc{
      margin: 0 0 14px;
      color: var(--muted);
      font-weight: 800;
    }
    .kicker{
      display:inline-flex;
      align-items:center;
      gap:8px;
      padding: 8px 10px;
      border-radius: 999px;
      border: 1px solid var(--line);
      background: rgba(249,115,22,.08);
      color: var(--muted);
      font-weight: 900;
      font-size: 13px;
    }

    /* Hero layout with image */
    .hero{ padding: 44px 0 18px; }
    .hero-grid{
      display:grid;
      gap: 18px;
      grid-template-columns: 1.05fr .95fr;
      align-items:stretch;
    }
    @media (max-width: 900px){ .hero-grid{ grid-template-columns: 1fr; } }

    .subcopy{
      margin: 0 0 14px;
      color: var(--muted);
      font-size: clamp(16px, 1.5vw, 24px);
      font-weight: 800;
    }
    .subcopy strong{ color: var(--ink); }

    .hero-bullets{
      margin: 14px 0 0;
      display:flex;
      flex-wrap:wrap;
      gap: 10px;
    }
    .pill{
      border: 1px solid var(--line);
      background: #fff;
      padding: 8px 10px;
      border-radius: 999px;
      font-weight: 900;
      color: var(--muted);
      font-size: 13px;
    }
    .cta-row{
      display:flex;
      flex-wrap:wrap;
      gap: 10px;
      margin-top: 18px;
    }

    /* Media blocks */
    .media{
      border-radius: var(--radius);
      overflow: hidden;
      border: 1px solid rgba(15,23,42,.10);
      background: rgba(15,23,42,.03);
      box-shadow: var(--shadow2);
      min-height: 340px;
      position: relative;
    }
    @media (max-width: 600px){ .media{ min-height: 240px; } }

    .media img{
      width: 100%;
      height: 100%;
      display:block;
      object-fit: cover;
    }
    .media .ph{
      position:absolute;
      inset:0;
      display:flex;
      align-items:center;
      justify-content:center;
      padding: 18px;
      text-align:center;
      color: var(--muted);
      font-weight: 900;
    }
    .media-note{
      margin-top: 10px;
      color: var(--muted);
      font-weight: 800;
      font-size: 13px;
    }

    /* Lists */
    .check{
      list-style:none;
      margin: 0;
      padding: 0;
      display:grid;
      gap: 10px;
    }
    .check li{
      display:flex;
      gap: 10px;
      align-items:flex-start;
      padding: 10px 12px;
      background: rgba(15,23,42,.02);
      border: 1px solid rgba(15,23,42,.06);
      border-radius: 14px;
      font-weight: 900;
    }
    .check .ico{
      width: 30px; height: 30px;
      border-radius: 10px;
      background: rgba(249,115,22,.12);
      border: 1px solid rgba(249,115,22,.22);
      display:flex;
      align-items:center;
      justify-content:center;
      color: #9a3412;
      flex: 0 0 auto;
      margin-top: 2px;
      font-weight: 1000;
    }

    .grid2{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    @media (max-width: 900px){ .grid2{ grid-template-columns: 1fr; } }

    .fbox{
      padding: 16px;
      border-radius: 16px;
      border: 1px solid var(--line);
      background: #fff;
      box-shadow: 0 10px 20px rgba(15,23,42,.06);
    }
    .fbox h3{
      margin: 0 0 6px;
      font-size: 16px;
      font-weight: 1000;
    }
    .fbox p{
      margin: 0;
      color: var(--muted);
      font-weight: 800;
    }

    .callout{
      padding: 14px 14px;
      border-radius: 16px;
      border: 1px solid rgba(249,115,22,.22);
      background: rgba(249,115,22,.06);
      color: var(--ink);
      font-weight: 1000;
    }
    .callout .red{ color: var(--danger); }

    .price{
      font-size: clamp(28px, 3vw, 42px);
      font-weight: 1000;
      margin: 6px 0 2px;
      letter-spacing:.01em;
    }
    .price small{
      font-size: 14px;
      color: var(--muted);
      font-weight: 900;
      margin-left: 6px;
    }
    .inc{
      margin: 0;
      color: var(--muted);
      font-weight: 900;
    }

    /* Future image cards */
    .imgcards{
      display:grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px;
    }
    @media (max-width: 900px){ .imgcards{ grid-template-columns: 1fr; } }
    .imgcard{
      overflow:hidden;
      border-radius: 16px;
      border: 1px solid var(--line);
      background:#fff;
      box-shadow: 0 10px 20px rgba(15,23,42,.06);
      display:grid;
      grid-template-rows: 180px auto;
    }
    .imgcard .pic{
      background: rgba(15,23,42,.03);
      position: relative;
    }
    .imgcard .pic img{ width:100%; height:100%; object-fit:cover; display:block; }
    .imgcard .pic .ph{
      position:absolute; inset:0;
      display:flex; align-items:center; justify-content:center;
      text-align:center; padding: 14px;
      color: var(--muted); font-weight: 900;
    }
    .imgcard .txt{ padding: 14px; }
    .imgcard h3{ margin:0 0 6px; font-size: 16px; font-weight: 1000; }
    .imgcard p{ margin:0; color: var(--muted); font-weight: 800; }

    footer{
      padding: 26px 0 34px;
      border-top: 1px solid var(--line);
      background: rgba(255,255,255,.75);
      color: var(--muted);
      margin-top: 10px;
    }
    .foot{
      display:grid;
      grid-template-columns: 1fr 1fr;
      gap: 14px;
    }
    @media (max-width: 900px){ .foot{ grid-template-columns: 1fr; } }
    .fine{
      font-size: 13px;
      font-weight: 800;
    }

/* ===== Feature boxes with small illustrated icons (SVG) ===== */
.fbox-row{
  display:flex;
  gap:12px;
  align-items:flex-start;
}
.fbox-ico{
  width:46px;
  height:46px;
  border-radius: 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  flex: 0 0 auto;
  border: 1px solid rgba(15,23,42,.10);
  box-shadow: 0 10px 20px rgba(15,23,42,.08);
}
.fbox-ico svg{
  width:24px;
  height:24px;
  color:#0f172a;
  opacity:.95;
}
/* icon color variations */
.fbox-ico.i-blue{   background: rgba(249,115,22,.14); border-color: rgba(249,115,22,.24); }
.fbox-ico.i-purple{ background: rgba(244,63,94,.14); border-color: rgba(244,63,94,.24); }
.fbox-ico.i-green{  background: rgba(251,191,36,.16); border-color: rgba(251,191,36,.26); }
.fbox-ico.i-orange{ background: rgba(249,115,22,.16); border-color: rgba(249,115,22,.26); }
.fbox-ico.i-gray{   background: rgba(15,23,42,.06); border-color: rgba(15,23,42,.14); }
.fbox-txt h3{ margin:0 0 6px; }
.fbox-txt p{ margin:0; }
/* =========================
  Brain Training Eikaiwa 20 - Roadmap Section
  - LPの既存デザインを邪魔しない「薄いブルーグレー」背景
  - シニア向け：余白多め、文字大きめ、コントラスト高め
========================= */

.bt20-roadmap{
  --bt20-bg: #f3f8ff;
  --bt20-panel: #ffffff;
  --bt20-ink: #0f172a;        /* 文字 */
  --bt20-sub: #475569;        /* サブ */
  --bt20-line: rgba(15, 23, 42, 0.10);
  --bt20-accent: #0b4dbb;     /* ネイビー寄りブルー */
  --bt20-accent2: #f59e0b;    /* ゴールド */
  --bt20-radius: 18px;
  --bt20-shadow: 0 10px 30px rgba(2, 8, 23, .08);

  padding: clamp(40px, 6vw, 72px) 0;
  background: radial-gradient(1000px 300px at 50% 0%, #e8f2ff 0%, var(--bt20-bg) 55%, #ffffff 100%);
  color: var(--bt20-ink);
}

.bt20-roadmap__wrap{
  width: min(1100px, calc(100% - 32px));
  margin: 0 auto;
}

.bt20-roadmap__head{
  text-align: center;
  margin-bottom: clamp(20px, 3vw, 32px);
}

.bt20-roadmap__eyebrow{
  display: inline-block;
  font-size: 12px;
  letter-spacing: .18em;
  font-weight: 700;
  color: var(--bt20-accent);
  background: rgba(11, 77, 187, .08);
  padding: 8px 12px;
  border-radius: 999px;
  margin: 0 0 12px;
}

.bt20-roadmap__title{
  font-size: clamp(22px, 3.2vw, 34px);
  line-height: 1.25;
  margin: 0 0 12px;
  font-weight: 800;
}

.bt20-roadmap__lead{
  max-width: 820px;
  margin: 0 auto;
  color: var(--bt20-sub);
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.8;
}

.bt20-roadmap__grid{
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 16px;
}

/* 5枚：PCは 3 + 2、タブレットは 2列、スマホは 1列 */
.bt20-card{
  grid-column: span 4;
  background: var(--bt20-panel);
  border: 1px solid var(--bt20-line);
  border-radius: var(--bt20-radius);
  box-shadow: var(--bt20-shadow);
  padding: 18px 18px 16px;
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}

.bt20-card:hover{
  transform: translateY(-2px);
  box-shadow: 0 14px 38px rgba(2, 8, 23, .10);
  border-color: rgba(11, 77, 187, .22);
}

.bt20-card__top{
  display: flex;
  gap: 14px;
  align-items: flex-start;
  margin-bottom: 10px;
}

.bt20-icon{
  width: 44px;
  height: 44px;
  border-radius: 14px;
  background: linear-gradient(135deg, rgba(11, 77, 187, .12), rgba(245, 158, 11, .12));
  border: 1px solid rgba(11, 77, 187, .18);
  display: grid;
  place-items: center;
  flex: 0 0 auto;
}

.bt20-icon__mark{
  font-weight: 900;
  color: var(--bt20-accent);
  font-size: 18px;
  line-height: 1;
}

.bt20-card__meta{
  min-width: 0;
}

.bt20-badge{
  display: inline-block;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: .08em;
  color: #7c2d12;
  background: rgba(245, 158, 11, .22);
  border: 1px solid rgba(245, 158, 11, .35);
  padding: 6px 10px;
  border-radius: 999px;
  margin-bottom: 8px;
}

.bt20-card__title{
  margin: 0;
  font-weight: 800;
  font-size: 17px;
  line-height: 1.35;
}

.bt20-card__text{
  margin: 0;
  color: var(--bt20-sub);
  font-size: 15px;
  line-height: 1.75;
}

/* フッター */
.bt20-roadmap__foot{
  text-align: center;
  margin-top: 18px;
}

.bt20-roadmap__note{
  margin: 0;
  color: var(--bt20-sub);
  font-size: 14px;
}

/* ====== Responsive ====== */
@media (max-width: 992px){
  .bt20-card{ grid-column: span 6; }
}
@media (max-width: 600px){
  .bt20-roadmap{ padding: 40px 0; }
  .bt20-card{ grid-column: span 12; }
  .bt20-card{ padding: 16px; }
}