:root {
    --forest: #1e3d2f;
    --forest-mid: #2d5c44;
    --forest-light: #e8f2ec;
    --earth: #7a5c3a;
    --earth-light: #f5ede0;
    --sky: #2a5a7a;
    --sky-light: #e0eef5;
    --cream: #f8f6f2;
    --cream-dark: #ede8df;
    --ink: #1a1a1a;
    --muted: #666;
    --border: rgba(30,61,47,0.12);
    --gold: #b8923a;
    --serif: 'Noto Serif JP', serif;
    --sans: 'Noto Sans JP', sans-serif;
  }
  *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: var(--sans);
    background: var(--cream);
    color: var(--ink);
    line-height: 1.7;
    overflow-x: hidden;
  }

  /* NAV */
  /*
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    display: flex; align-items: center; justify-content: space-between;
    padding: 0 48px; height: 64px;
    background: rgba(248,246,242,0.93);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
  }
  .nav-logo { font-family: var(--serif); font-size: 22px; font-weight: 700; color: var(--forest); letter-spacing: 0.05em; }
  .nav-logo span { color: var(--gold); }
  .nav-badge {
    font-size: 10px; font-weight: 700; letter-spacing: 0.1em;
    color: var(--forest); background: var(--forest-light);
    padding: 2px 8px; border-radius: 2px; margin-left: 8px;
  }
  .nav-links { display: flex; gap: 32px; list-style: none; }
  .nav-links a { font-size: 13px; font-weight: 500; color: var(--muted); text-decoration: none; transition: color 0.2s; }
  .nav-links a:hover { color: var(--forest); }
  .nav-cta { background: var(--forest); color: #fff !important; padding: 8px 20px; border-radius: 2px; }
  .nav-cta:hover { background: var(--forest-mid) !important; }
*/
  /* HERO */
  .hero {
    /* min-height: 100vh; */
    background: var(--forest);
    display: grid;
    grid-template-columns: 1fr 1fr;
    align-items: center;
    padding: 28px 28px 28px;
    gap: 58px;
    position: relative;
    overflow: hidden;
  }
  .hero::before {
    content: '';
    position: absolute; inset: 0;
    background-image:
      radial-gradient(ellipse at 80% 50%, rgba(184,146,58,0.08) 0%, transparent 60%),
      radial-gradient(ellipse at 20% 80%, rgba(42,90,122,0.15) 0%, transparent 50%);
    pointer-events: none;
  }
  .hero-left { position: relative; z-index: 1; }
  .hero-tag {
    display: inline-block; font-size: 11px; font-weight: 700;
    letter-spacing: 0.18em; color: var(--gold);
    border: 1px solid rgba(184,146,58,0.4);
    padding: 4px 12px; margin-bottom: 28px; text-transform: uppercase;
  }
  .hero h1 {
    font-family: var(--serif);
    font-size: clamp(28px, 3.5vw, 46px);
    font-weight: 900; line-height: 1.4;
    color: #fff; margin-bottom: 28px;
  }
  .hero h1 em { font-style: normal; color: var(--gold); }
  .hero-desc { font-size: 15px; color: rgba(255,255,255,0.7); line-height: 1.9; margin-bottom: 40px; max-width: 460px; }
  .hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
  .hero-nav {
    position: relative;
    top: -50px;
    text-align: center;
    z-index: 10;
  }
  .btn-ghost {
    border: 1.5px solid rgba(255,255,255,0.3);
    color: rgba(255,255,255,0.8);
    padding: 16px 40px;
    font-size: 15px;
    font-weight: 500;
    text-decoration: none;
    border-radius: 2px;
    transition: all 0.2s;
  }
  .btn-ghost:hover { border-color: #fff; color: #fff; }
  .btn-gold {
    display: inline-block;
    min-width: 246px;
    background: var(--gold); color: var(--forest);
    padding: 14px 32px; font-size: 14px; font-weight: 700;
    letter-spacing: 0.05em; text-decoration: none; border-radius: 2px;
    transition: all 0.2s;
  }
  .btn-gold:hover { background: #d4aa55; transform: translateY(-2px); }
  .btn-outline-white {
    border: 1.5px solid rgba(255,255,255,0.35); color: rgba(255,255,255,0.85);
    padding: 14px 32px; font-size: 14px; font-weight: 500;
    text-decoration: none; border-radius: 2px; transition: all 0.2s;
  }
  .btn-outline-white:hover { border-color: #fff; color: #fff; }

  /* Hero right — case card */
  .hero-right { position: relative; z-index: 1; }
  .hero-case {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 4px; padding: 40px;
  }
  .hero-case-label {
    font-size: 11px; font-weight: 700; letter-spacing: 0.15em;
    color: rgba(255,255,255,0.4); text-transform: uppercase; margin-bottom: 20px;
  }
  .hero-case-name {
    font-family: var(--serif); font-size: 22px; font-weight: 900;
    color: #fff; margin-bottom: 24px;
  }
  .hero-case-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 28px; }
  .hcs-num { font-family: var(--serif); font-size: 32px; font-weight: 900; color: var(--gold); line-height: 1; margin-bottom: 4px; }
  .hcs-label { font-size: 12px; color: rgba(255,255,255,0.55); }
  .hero-case-quote {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px; font-size: 13px; color: rgba(255,255,255,0.65);
    line-height: 1.8; font-style: italic;
  }

  /* SECTIONS */
  section { padding: 96px 28px; }
  .section-tag { font-size: 11px; font-weight: 700; letter-spacing: 0.2em; color: var(--forest); text-transform: uppercase; margin-bottom: 12px; }
  .section-title { font-family: var(--serif); font-size: clamp(26px,3vw,40px); font-weight: 900; line-height: 1.35; color: var(--ink); margin-bottom: 16px; }
  .section-lead { font-size: 15px; color: var(--muted); max-width: 560px; line-height: 1.9; margin-bottom: 56px; }

  /* CHALLENGE */
  .challenge-section { background: var(--cream); }
  .challenge-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
  .challenge-card {
    background: #fff; border: 1px solid var(--border); border-radius: 4px;
    padding: 32px; border-top: 3px solid transparent;
    transition: transform 0.2s;
  }
  .challenge-card:nth-child(1) { border-top-color: var(--earth); }
  .challenge-card:nth-child(2) { border-top-color: var(--sky); }
  .challenge-card:nth-child(3) { border-top-color: var(--forest); }
  .challenge-card:hover { transform: translateY(-4px); }
  .challenge-icon { font-size: 32px; margin-bottom: 16px; }
  .challenge-card h4 { font-size: 16px; font-weight: 700; color: var(--ink); margin-bottom: 12px; line-height: 1.5; }
  .challenge-card p { font-size: 13px; color: var(--muted); line-height: 1.9; }

  /* WHAT IS */
  .whatis-section { background: var(--forest); }
  .whatis-section .section-tag { color: rgba(184,146,58,0.9); }
  .whatis-section .section-title { color: #fff; }
  .whatis-section .section-lead { color: rgba(255,255,255,0.65); }
  .whatis-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
  .whatis-card {
    background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.12);
    border-radius: 4px; padding: 36px; transition: border-color 0.2s;
  }
  .whatis-card:hover { border-color: rgba(184,146,58,0.4); }
  .whatis-vs {
    display: grid; grid-template-columns: 1fr auto 1fr;
    align-items: center; gap: 16px; margin-bottom: 20px;
  }
  .whatis-before {
    font-size: 13px; color: rgba(255,255,255,0.45);
    text-decoration: line-through;
    text-decoration-color: rgba(255,80,80,0.5);
  }
  .whatis-arrow { color: var(--gold); font-size: 18px; font-weight: 700; }
  .whatis-after { font-size: 14px; font-weight: 700; color: #fff; }
  .whatis-card p { font-size: 13px; color: rgba(255,255,255,0.6); line-height: 1.9; }

  /* VALUE */
  .value-section { background: var(--cream-dark); }
  .value-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
  .value-card {
    background: #fff; border: 1px solid var(--border); border-radius: 4px;
    overflow: hidden; transition: transform 0.2s, box-shadow 0.2s;
  }
  .value-card:hover { transform: translateY(-4px); box-shadow: 0 16px 48px rgba(30,61,47,0.12); }
  .value-card-header {
    background: var(--forest); padding: 28px;
    position: relative; overflow: hidden;
  }
  .value-card:nth-child(2) .value-card-header { background: var(--sky); }
  .value-card:nth-child(3) .value-card-header { background: var(--earth); }
  .value-card-num {
    font-family: var(--serif); font-size: 48px; font-weight: 900;
    color: rgba(255,255,255,0.15); line-height: 1; margin-bottom: 8px;
  }
  .value-card-header h4 { font-size: 17px; font-weight: 700; color: #fff; line-height: 1.4; }
  .value-card-body { padding: 28px; }
  .value-card-body p { font-size: 13px; color: var(--muted); line-height: 1.9; margin-bottom: 16px; }
  .value-metric {
    background: var(--forest-light); border-left: 3px solid var(--forest);
    padding: 12px 16px; font-size: 13px; font-weight: 700; color: var(--forest);
    border-radius: 0 2px 2px 0;
  }
  .value-card:nth-child(2) .value-metric { background: var(--sky-light); border-left-color: var(--sky); color: var(--sky); }
  .value-card:nth-child(3) .value-metric { background: var(--earth-light); border-left-color: var(--earth); color: var(--earth); }

  /* HOW */
  .how-section { background: #fff; }
  .how-steps { max-width: 760px; }
  .how-step {
    display: grid; grid-template-columns: 80px 1fr;
    gap: 24px; margin-bottom: 40px;
    padding-bottom: 40px; border-bottom: 1px solid var(--border);
  }
  .how-step:last-child { border-bottom: none; margin-bottom: 0; }
  .how-step-num {
    font-family: var(--serif); font-size: 48px; font-weight: 900;
    color: var(--forest-light); line-height: 1; text-align: center;
    padding-top: 4px;
  }
  .how-step h4 { font-size: 18px; font-weight: 700; color: var(--ink); margin-bottom: 10px; }
  .how-step p { font-size: 14px; color: var(--muted); line-height: 1.9; }
  .how-step-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 12px; }
  .how-tag {
    font-size: 11px; font-weight: 700; letter-spacing: 0.05em;
    color: var(--forest); background: var(--forest-light);
    padding: 3px 10px; border-radius: 2px;
  }
  .how-right { background: var(--forest-light); border-radius: 4px; padding: 40px; }
  .how-right h3 { font-family: var(--serif); font-size: 20px; font-weight: 700; color: var(--forest); margin-bottom: 20px; }
  .burden-item { display: flex; align-items: flex-start; gap: 12px; margin-bottom: 16px; }
  .burden-icon { color: var(--forest); font-size: 16px; margin-top: 2px; flex-shrink: 0; }
  .burden-item p { font-size: 13px; color: var(--forest-mid); line-height: 1.7; }

  /* CASES */
  .cases-section { background: var(--cream); }
  .cases-main { display: grid; grid-template-columns: 1.4fr 1fr; gap: 32px; margin-bottom: 32px; }
  .case-main-card {
    background: var(--forest); border-radius: 4px; padding: 22px;
    position: relative; overflow: hidden;
  }
  .case-main-card::after {
    content: '';
    position: absolute; bottom: -60px; right: -60px;
    width: 200px; height: 200px;
    border-radius: 50%;
    background: rgba(184,146,58,0.1);
  }
  .case-main-label { font-size: 11px; font-weight: 700; letter-spacing: 0.15em; color: var(--gold); margin-bottom: 16px; text-transform: uppercase; }
  .case-main-name { font-family: var(--serif); font-size: 26px; font-weight: 900; color: #fff; margin-bottom: 20px; line-height: 1.3; }
  .case-main-stats { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-bottom: 24px; }
  .cms-num { font-family: var(--serif); font-size: 36px; font-weight: 900; color: var(--gold); line-height: 1; margin-bottom: 4px; }
  .cms-label { font-size: 12px; color: rgba(255,255,255,0.55); }
  .case-main-quote { font-size: 13px; color: rgba(255,255,255,0.7); line-height: 1.8; font-style: italic; border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; position: relative; z-index: 1; }
  .case-sub-cards { display: flex; flex-direction: column; gap: 16px; }
  .case-sub-card {
    background: #fff; border: 1px solid var(--border); border-radius: 4px;
    padding: 24px 28px; flex: 1;
  }
  .case-sub-label { font-size: 11px; font-weight: 700; letter-spacing: 0.1em; color: var(--muted); text-transform: uppercase; margin-bottom: 8px; }
  .case-sub-card h5 { font-size: 15px; font-weight: 700; color: var(--ink); margin-bottom: 8px; }
  .case-sub-card p { font-size: 13px; color: var(--muted); line-height: 1.7; }

  .case-link{ margin: 1rem 0 1rem;  text-align: center; }

  /* CTA */
  .cta-section { background: var(--forest); text-align: center; padding: 96px 48px; }
  .cta-section .section-tag { color: var(--gold); }
  .cta-section .section-title { color: #fff; margin: 0 auto 16px; }
  .cta-section .section-lead { color: rgba(255,255,255,0.65); margin: 0 auto 48px; }
  .cta-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
  .btn-forest-outline {
    border: 1.5px solid rgba(255,255,255,0.3); color: rgba(255,255,255,0.8);
    padding: 16px 40px; font-size: 15px; font-weight: 500;
    text-decoration: none; border-radius: 2px; transition: all 0.2s;
  }
  .btn-forest-outline:hover { border-color: #fff; color: #fff; }

  /* FOOTER */
   /* 以下　common.css　を適用　---------
  footer { background: #0d1a11; color: rgba(255,255,255,0.4); text-align: center; padding: 32px 48px; font-size: 12px; }
  footer a { color: rgba(255,255,255,0.5); text-decoration: none; margin: 0 12px; }
  footer a:hover { color: var(--gold); }
  ------------------------------------- */
  /* FADE */
  .fade-up { opacity: 0; transform: translateY(30px); transition: opacity 0.7s ease, transform 0.7s ease; }
  .fade-up.visible { opacity: 1; transform: translateY(0); }

  .grid-2col { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: start; }

  @media (max-width: 768px) {
    nav { padding: 0 20px; }
    .nav-links { display: none; }
    .hero, .grid-2col, .cases-main { grid-template-columns: 1fr; padding: 100px 20px 48px; gap: 32px; }
    section { padding: 64px 20px; }
    .challenge-grid, .whatis-grid, .value-grid { grid-template-columns: 1fr; }
    .how-step { grid-template-columns: 1fr; }
  }