:root{
    --forest:   #184A33;
    --forest-d: #0F3322;
    --leaf:     #8FBF1B;
    --leaf-d:   #6FA00F;
    --dune:     #EFE4C6;
    --dune-d:   #DDCB9E;
    --dune-l:   #FCF9F1;
    --sea:      #1F7A8C;
    --sea-l:    #4FA3B3;
    --sun:      #F5B400;
    --ink:      #1A1A1A;
    --white:    #FFFFFF;
    --tint-leaf:   #E9F2D9;
    --tint-sea:    #DCEEF1;
    --tint-sun:    #FDEFD2;
    --tint-forest: #E1E9E3;
    --font-display:'Zen Maru Gothic', sans-serif;
    --font-body:'Noto Sans JP', sans-serif;
    --font-label:'Zen Kaku Gothic New', sans-serif;
    --container: 1240px;
  }
  *{margin:0;padding:0;box-sizing:border-box;}
  html{scroll-behavior:smooth;overflow-x:hidden;}
  body{font-family:var(--font-body);font-size:18px;color:var(--ink);background:var(--dune-l);line-height:1.9;-webkit-font-smoothing:antialiased;overflow-x:hidden;width:100%;}
  img{max-width:100%;display:block;}
  a{color:inherit;text-decoration:none;}
  ul{list-style:none;}
  .container{max-width:var(--container);margin:0 auto;padding:0 24px;}

  /* ===== Cases section ===== */
  .cases-section{padding:70px 0 110px;}

  .cases-lead{
    max-width:860px;margin:0 auto 52px;
    font-size:17px;line-height:2;color:var(--ink);
    text-align:center;
  }

  .cases-count{
    font-family:var(--font-label);font-weight:700;
    font-size:15px;color:var(--forest);
    margin-bottom:24px;
    display:flex;align-items:center;gap:8px;
  }
  .cases-count span{
    font-size:26px;color:var(--leaf-d);font-family:var(--font-display);font-weight:900;
  }

  /* ===== Card grid ===== */
  .card-grid{
    display:grid;
    grid-template-columns:repeat(3,1fr);
    gap:28px;
  }

  .case-card{
    background:var(--white);
    border:1px solid var(--dune-d);
    border-radius:18px;
    overflow:hidden;
    box-shadow:0 10px 28px rgba(15,51,34,.07);
    display:flex;flex-direction:column;
    transition:transform .2s, box-shadow .2s;
  }
  .case-card:hover{transform:translateY(-4px);box-shadow:0 18px 40px rgba(15,51,34,.12);}

  .card-img{
    width:100%;height:200px;
    background:var(--tint-forest);
    overflow:hidden;
    position:relative;
  }
  .card-img img{width:100%;height:100%;object-fit:contain;display:block;}
  .card-img-placeholder{
    width:100%;height:100%;
    display:flex;align-items:center;justify-content:center;
    flex-direction:column;gap:8px;
  }
  .card-img-placeholder svg{opacity:.35;}
  .card-img-placeholder span{font-size:13px;color:var(--forest);opacity:.5;font-family:var(--font-label);}

  .card-body{padding:24px 26px 20px;flex:1;display:flex;flex-direction:column;gap:12px;}

  .card-tag{
    display:inline-flex;align-items:center;
    font-family:var(--font-label);font-weight:700;font-size:12px;
    padding:4px 12px;border-radius:999px;
    width:fit-content;
  }
  .tag-company{background:var(--tint-sea);color:var(--sea);}
  .tag-org{background:var(--tint-leaf);color:var(--forest);}
  .tag-gov{background:var(--tint-sun);color:#7A5A00;}
  .tag-edu{background:#F0E4F7;color:#6A3A8A;}
  .tag-other{background:var(--tint-forest);color:var(--forest);}

  .card-org{
    font-family:var(--font-label);font-weight:700;
    font-size:16px;color:var(--forest);
    line-height:1.4;
  }

  .card-title{
    font-family:var(--font-label);font-weight:700;
    font-size:17px;color:var(--ink);
    line-height:1.55;
  }

  .card-desc{
    font-size:14px;color:#555;
    line-height:1.85;
    flex:1;
    display:-webkit-box;
    -webkit-line-clamp:4;
    -webkit-box-orient:vertical;
    overflow:hidden;
  }

  .card-footer{
    padding:0 26px 24px;
    display:flex;justify-content:flex-end;
  }
  .card-link{
    font-family:var(--font-label);font-weight:700;font-size:14px;
    color:var(--white);background:var(--forest);
    border-radius:999px;padding:10px 22px;
    display:inline-flex;align-items:center;gap:6px;
    transition:background .18s;
  }
  .card-link:hover{background:var(--leaf-d);}
  .card-link::after{content:"→";}

  /* ===== ページネーション ===== */
  .cases-pagination{
    margin:44px auto 0;
    display:flex;justify-content:center;gap:8px;flex-wrap:wrap;
  }
  .cases-pagination a,
  .cases-pagination span{
    font-family:var(--font-label);font-weight:700;font-size:14px;
    padding:9px 16px;border-radius:999px;
    background:var(--tint-forest);color:var(--forest);
    border:1.5px solid var(--dune-d);
  }
  .cases-pagination a:hover{background:var(--forest);color:var(--white);border-color:var(--forest);}
  .cases-pagination .current{background:var(--forest);color:var(--white);border-color:var(--forest);}

  /* ===== CTA ===== */
  .cases-cta{
    margin-top:64px;
    background:linear-gradient(135deg,var(--tint-leaf) 0%,var(--tint-sea) 100%);
    border:1px solid var(--dune-d);
    border-radius:20px;
    padding:44px 44px;
    text-align:center;
    box-shadow:0 10px 28px rgba(15,51,34,.06);
  }
  .cases-cta h2{
    font-family:var(--font-display);font-weight:900;
    font-size:clamp(20px,2.5vw,26px);
    color:var(--forest);margin-bottom:14px;
  }
  .cases-cta p{font-size:16px;color:var(--ink);margin-bottom:28px;line-height:1.9;}
  .cases-cta a{
    display:inline-flex;align-items:center;gap:10px;
    font-family:var(--font-label);font-weight:700;font-size:17px;
    background:var(--sun);color:var(--forest-d);
    border-radius:999px;padding:16px 40px;
    box-shadow:0 8px 20px rgba(245,180,0,.3);
    transition:background .18s, transform .18s;
  }
  .cases-cta a:hover{background:#e0a600;transform:translateY(-2px);}

  /* ===== Footer ===== */
  footer.site-footer{background:var(--forest-d);color:var(--white);padding:56px 0 30px;}
  .footer-brand{display:flex;align-items:center;margin-bottom:30px;}
  .footer-brand strong{font-family:var(--font-display);color:var(--white);font-size:18px;}
  .footer-nav{display:flex;flex-wrap:wrap;gap:10px 28px;margin-bottom:30px;padding-bottom:30px;border-bottom:1px solid #2A5440;}
  .footer-nav a{font-size:15px;color:var(--white);transition:opacity .2s;}
  .footer-nav a:hover{opacity:.75;}
  .footer-bottom{font-size:13.5px;color:var(--white);text-align:center;display:flex;flex-direction:column;gap:6px;}
  .footer-bottom .footer-credit{font-size:12px;color:#9FB3A4;}
  .footer-bottom a{color:var(--white);}

  /* ===== Responsive ===== */
  @media(max-width:980px){
    nav.main-nav{position:fixed;inset:72px 0 0 0;background:var(--dune-l);z-index:99;transform:translateX(100%);transition:transform .25s ease;padding:24px;overflow-y:auto;}
    nav.main-nav.open{transform:translateX(0);}
    nav.main-nav ul{flex-direction:column;align-items:stretch;gap:4px;}
    nav.main-nav a{display:block;padding:15px 10px;font-size:17px;border-bottom:1px solid var(--dune-d);border-radius:0;}
    nav.main-nav a.nav-cta{margin:14px 0 0;text-align:center;border-bottom:none;border-radius:999px;}
    .nav-toggle{display:flex;}
    .card-grid{grid-template-columns:repeat(2,1fr);}
  }
  @media(max-width:640px){
    .brand-text strong{font-size:16px;white-space:normal;}
    .header-inner{padding:14px 20px;}
    .brand{min-width:0;flex:1 1 auto;}
    .page-header{padding:44px 0 36px;}
    .cases-section{padding:50px 0 80px;}
    .cases-lead{text-align:left;}
    .card-grid{grid-template-columns:1fr;}
    .cases-cta{padding:32px 22px;}
  }