:root{
  --primary:#B07A2A;
  --dark:#6E4A1E;
  --light:#F3E7CF;
  --accent:#D29A3A;
  --bg:#FCF9F3;
  --text:#292624;
  --nudge-brand:#3d6a85;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  font-family:"Hiragino Kaku Gothic ProN","Hiragino Sans","Yu Gothic Medium","Yu Gothic","Noto Sans JP",sans-serif;
  color:var(--text);
  background:var(--bg);
  line-height:1.9;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.toi-brand{color:var(--text);}
.nudge-brand{color:var(--nudge-brand);font-weight:700;}

/* ===== Header ===== */
.toi-header{
  position:sticky;top:0;z-index:100;
  background:#fff;
  border-bottom:1px solid #eee2cf;
}
.toi-header-inner{
  max-width:1200px;margin:0 auto;
  padding:14px 24px;
  display:flex;align-items:center;justify-content:space-between;
  gap:12px;
}
.toi-header-logo{
  font-size:1.05rem;font-weight:700;letter-spacing:.02em;white-space:nowrap;
}
.toi-header-breadcrumb{
  flex:1;
  display:flex;align-items:center;justify-content:center;
  gap:8px;font-size:.85rem;color:#6b665f;
  min-width:0;
}
.toi-header-breadcrumb a{white-space:nowrap;}
.toi-header-breadcrumb .crumb-current{
  white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  color:#6b665f;
}
.toi-header-breadcrumb .crumb-sep{color:#c9c2b3;}
.toi-header-contact{
  flex-shrink:0;
  background:var(--nudge-brand);
  color:#fff;
  font-size:.82rem;font-weight:700;
  padding:10px 18px;border-radius:999px;
  white-space:nowrap;
}

/* ===== FV ===== */
.fv{
  padding:64px 24px 0;
  background:linear-gradient(180deg,#fff 0%, var(--light) 100%);
  text-align:center;
}
.fv-inner{max-width:900px;margin:0 auto;}
.fv-label{
  font-size:.82rem;letter-spacing:.08em;color:var(--dark);
  margin:0 0 8px;font-weight:700;
}
.fv-theme{
  display:inline-block;
  font-size:.9rem;font-weight:700;color:#fff;
  background:var(--primary);
  padding:5px 18px;border-radius:999px;
  margin-bottom:26px;letter-spacing:.05em;
}
.fv-title{
  font-size:3.15rem;
  line-height:1.5;
  font-weight:800;
  margin:0 auto 30px;
  max-width:860px;
  letter-spacing:.01em;
  color:var(--text);
}
.fv-sub{
  font-size:1.15rem;
  line-height:2;
  color:#4a4540;
  margin:0 0 22px;
}
.fv-note{
  font-size:1rem;
  color:var(--dark);
  font-weight:700;
  margin:0 0 34px;
}
.fv-trust{
  display:inline-block;
  font-size:.85rem;
  color:#6b665f;
  border-top:1px solid #ddd2b0;
  padding-top:16px;
  line-height:1.9;
}
.fv-visual-wrap{
  max-width:1200px;margin:44px auto 0;padding:0 24px 56px;
}
.fv-visual{
  width:100%;height:auto;border-radius:14px;
  box-shadow:0 18px 40px rgba(110,74,30,.16);
}

/* ===== Section common ===== */
.sec{padding:88px 24px;}
.sec-inner{max-width:840px;margin:0 auto;}
.sec:nth-of-type(even){background:#fff;}
.sec-num{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:50%;
  background:var(--light);color:var(--dark);
  font-size:.85rem;font-weight:800;
  margin-bottom:18px;
}
.sec-eyebrow{
  font-size:.95rem;font-weight:700;color:var(--primary);
  margin:0 0 14px;letter-spacing:.02em;
}
.sec-heading{
  font-size:1.7rem;font-weight:800;line-height:1.7;
  margin:0 0 34px;color:var(--text);
}
.sec-body p{font-size:1.02rem;line-height:2;margin:0 0 20px;color:#3a3530;}
.sec-body p:last-child{margin-bottom:0;}
.core-message{
  margin-top:36px;
  background:var(--light);
  border-left:4px solid var(--primary);
  border-radius:4px;
  padding:24px 28px;
  font-size:1.05rem;font-weight:700;line-height:1.9;
  color:var(--dark);
}

/* ===== chip-row ===== */
.chip-row{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0;padding:0;list-style:none;}
.chip{
  background:var(--light);color:var(--dark);
  padding:9px 18px;border-radius:999px;
  font-size:.92rem;font-weight:600;
}
.chip-row.is-avoid .chip{
  background:#f2ebe0;color:#8a8175;
  text-decoration:line-through;
  font-weight:500;
}

/* ===== issue-list ===== */
.issue-list, .check-list{
  list-style:none;margin:22px 0;padding:0;
  display:grid;grid-template-columns:repeat(2,1fr);gap:12px 24px;
}
.issue-list li, .check-list li{
  font-size:.98rem;line-height:1.7;color:#3a3530;
  padding-left:26px;position:relative;
}
.issue-list li::before{
  content:"";position:absolute;left:0;top:.65em;
  width:8px;height:8px;border-radius:50%;
  background:var(--accent);
}
.check-list li::before{
  content:"✓";position:absolute;left:0;top:0;
  color:var(--primary);font-weight:800;
}

/* ===== flow-vertical ===== */
.flow-vertical{list-style:none;margin:28px 0;padding:0;max-width:520px;}
.flow-vertical li{
  background:#fff;border:1px solid #eadfc4;
  border-radius:10px;padding:16px 22px;
  font-size:1rem;font-weight:700;color:var(--text);
  text-align:center;position:relative;
  margin-bottom:34px;
}
.flow-vertical li:last-child{margin-bottom:0;}
.flow-vertical li::after{
  content:"↓";
  position:absolute;left:50%;bottom:-32px;transform:translateX(-50%);
  color:var(--primary);font-size:1.3rem;font-weight:800;
}
.flow-vertical li:last-child::after{content:none;}
.flow-vertical.is-compact li{font-size:.92rem;padding:12px 18px;margin-bottom:28px;}
.flow-vertical.is-compact li::after{bottom:-26px;font-size:1.1rem;}

/* section visual image (差替え画像) */
.sec-visual{display:block;width:100%;height:auto;margin:30px 0;border-radius:10px;}

/* ===== compare-grid ===== */
.compare-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:28px 0;
  align-items:stretch;
}
.compare-col{
  background:#fff;border:1px solid #eadfc4;border-radius:12px;
  padding:26px 22px;
}
.compare-col.is-highlight{
  background:var(--light);border:1px solid var(--primary);
}
.compare-col h3{
  font-size:1rem;font-weight:800;margin:0 0 16px;color:var(--dark);
  text-align:center;
}
.compare-col ul, .compare-col ol{margin:0;padding-left:0;list-style:none;}
.compare-col.is-flow ul li{
  background:#faf6ec;border:1px solid #eee2cf;border-radius:8px;
  padding:10px 14px;font-size:.9rem;font-weight:700;text-align:center;
  margin-bottom:22px;position:relative;
}
.compare-col.is-highlight.is-flow ul li{background:#fff;}
.compare-col.is-flow ul li:last-child{margin-bottom:0;}
.compare-col.is-flow ul li::after{
  content:"↓";position:absolute;left:50%;bottom:-20px;transform:translateX(-50%);
  color:var(--primary);font-size:1rem;font-weight:800;
}
.compare-col.is-flow ul li:last-child::after{content:none;}
.compare-col:not(.is-flow) ul li{
  font-size:.94rem;line-height:1.8;padding-left:20px;position:relative;margin-bottom:8px;
}
.compare-col:not(.is-flow) ul li::before{
  content:"・";position:absolute;left:0;color:var(--primary);
}

/* ===== qa-grid ===== */
.qa-grid{
  display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:26px 0;
}
.qa-card{
  background:#fff;border:1px solid #eadfc4;border-radius:10px;padding:18px 20px;
}
.qa-card .qa-tag{
  display:inline-block;font-size:.75rem;font-weight:800;color:#fff;
  background:var(--primary);border-radius:6px;padding:2px 10px;margin-bottom:10px;
}
.qa-card .qa-q{font-size:.96rem;font-weight:700;color:var(--text);line-height:1.6;}

/* ===== info-grid ===== */
.info-grid{
  display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin:28px 0;
}
.info-card{
  background:#fff;border:1px solid #eadfc4;border-radius:12px;padding:22px 22px;
}
.info-card h4{
  margin:0 0 10px;font-size:1.02rem;font-weight:800;color:var(--dark);
}
.info-card p{margin:0;font-size:.92rem;line-height:1.8;color:#4a4540;}

/* ===== perspective-row (section15) ===== */
.perspective-row{
  display:flex;justify-content:space-between;gap:16px;margin:36px 0 10px;
  align-items:flex-end;
}
.perspective-col{
  flex:1;background:#fff;border:1px solid #eadfc4;border-radius:12px;
  padding:20px 18px;text-align:left;
}
.perspective-col.lv-1{margin-bottom:44px;}
.perspective-col.lv-2{margin-bottom:22px;}
.perspective-col.lv-3{margin-bottom:0;}
.perspective-col .p-role{
  font-size:.8rem;font-weight:800;color:#fff;background:var(--primary);
  display:inline-block;padding:3px 12px;border-radius:999px;margin-bottom:12px;
}
.perspective-col ul{margin:0;padding:0;list-style:none;}
.perspective-col li{
  font-size:.9rem;line-height:1.7;padding-left:16px;position:relative;margin-bottom:6px;color:#3a3530;
}
.perspective-col li::before{content:"・";position:absolute;left:0;color:var(--primary);}
.perspective-baseline{
  height:2px;background:#eadfc4;margin:0 0 40px;position:relative;
}

/* ===== radiate-grid (section16) ===== */
.radiate-wrap{margin:32px 0;text-align:center;}
.radiate-center{
  display:inline-block;background:var(--primary);color:#fff;
  font-weight:800;font-size:1rem;border-radius:999px;padding:12px 28px;margin-bottom:26px;
}
.radiate-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;}
.radiate-card{
  background:#fff;border:1px solid #eadfc4;border-radius:12px;padding:18px 14px;text-align:left;
}
.radiate-card .r-tag{
  font-size:.78rem;font-weight:800;color:var(--dark);display:block;margin-bottom:8px;
}
.radiate-card ul{margin:0;padding:0;list-style:none;}
.radiate-card li{font-size:.85rem;line-height:1.7;color:#4a4540;}

/* ===== network-spread (section18) ===== */
.network-spread{margin:32px 0 22px;}
.network-row{
  display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;
  margin-bottom:22px;
}
.network-node{
  background:#fff;border:1px solid var(--primary);color:var(--dark);
  font-weight:800;font-size:.92rem;padding:10px 18px;border-radius:999px;
}
.network-arrow{color:var(--accent);font-size:1.2rem;font-weight:800;}
.network-row.lv-2 .network-node{background:var(--light);}
.network-row.lv-3{gap:8px;}
.network-row.lv-3 .network-node{background:var(--primary);color:#fff;font-size:.85rem;padding:8px 14px;}

/* ===== design-grid (section20) ===== */
.design-grid{
  display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin:30px 0;
}
.design-card{
  background:#fff;border:1px solid #eadfc4;border-radius:12px;padding:16px 12px;text-align:center;
}
.design-card .d-key{
  display:block;font-size:.78rem;font-weight:800;color:#fff;background:var(--primary);
  border-radius:999px;padding:4px 0;margin-bottom:10px;
}
.design-card ul{margin:0;padding:0;list-style:none;}
.design-card li{font-size:.82rem;line-height:1.7;color:#4a4540;}

/* pair-list */
.pair-list{list-style:none;margin:26px 0 0;padding:0;}
.pair-list li{
  background:#fff;border:1px solid #eadfc4;border-radius:10px;
  padding:16px 20px;margin-bottom:12px;font-size:.94rem;line-height:1.8;
}
.pair-list .pill{
  display:inline-block;background:var(--light);color:var(--dark);
  font-weight:800;border-radius:6px;padding:2px 10px;margin-right:10px;font-size:.85rem;
}

/* quote-box */
.quote-box{
  background:#fff;border:1px solid #eadfc4;border-radius:12px;
  padding:20px 24px;margin:24px 0;font-size:1rem;font-weight:700;
  color:var(--dark);position:relative;
}

/* flow-row (section22 削る→余白→価値) */
.flow-row{display:flex;align-items:center;gap:14px;margin:28px 0;flex-wrap:wrap;justify-content:center;}
.flow-row .f-step{
  background:#fff;border:1px solid #eadfc4;border-radius:10px;
  padding:16px 22px;font-weight:800;font-size:.98rem;text-align:center;flex:1;min-width:140px;
}
.flow-row .f-step.is-highlight{background:var(--light);border-color:var(--primary);color:var(--dark);}
.flow-row .f-arrow{color:var(--primary);font-size:1.3rem;font-weight:800;}

/* diagnose (section23) */
.diagnose-note{
  font-size:.9rem;color:var(--dark);font-weight:700;margin:0 0 6px;
}

/* mothership banner */
.mothership-banner{
  padding:70px 24px;background:var(--dark);color:#fff;text-align:center;
}
.mothership-banner .mb-inner{max-width:760px;margin:0 auto;}
.mothership-banner .mb-badge{
  display:inline-block;font-size:.78rem;font-weight:700;
  background:rgba(255,255,255,.14);padding:6px 16px;border-radius:999px;margin-bottom:20px;
  line-height:1.7;
}
.mothership-banner h2{font-size:1.4rem;font-weight:800;line-height:1.8;margin:0 0 18px;}
.mothership-banner p{font-size:.95rem;line-height:1.9;color:#f1e7d3;margin:0 0 30px;}
.mb-cta{
  display:inline-block;background:var(--accent);color:#2c2418;font-weight:800;
  padding:14px 34px;border-radius:999px;font-size:.95rem;
}

/* final CTA */
.final-cta{padding:90px 24px;text-align:center;background:linear-gradient(180deg,#fff, var(--light));}
.final-cta h2{font-size:1.55rem;font-weight:800;line-height:1.8;margin:0 0 30px;max-width:700px;margin-left:auto;margin-right:auto;}
.final-cta-buttons{display:flex;flex-wrap:wrap;gap:16px;justify-content:center;margin-bottom:28px;}
.final-cta-buttons a{
  background:var(--primary);color:#fff;font-weight:800;font-size:.95rem;
  padding:16px 30px;border-radius:999px;
}
.final-cta p.fc-note{max-width:560px;margin:0 auto;font-size:.9rem;color:#5a5348;line-height:1.9;}

/* topic nav */
.jitsumu-topic-nav{padding:70px 24px 90px;background:#fff;border-top:1px solid #eee2cf;}
.jitsumu-topic-nav-inner{max-width:1100px;margin:0 auto;text-align:center;}
.jitsumu-topic-nav h2{font-size:1.3rem;font-weight:800;margin:0 0 14px;}
.jitsumu-topic-nav p{font-size:.9rem;color:#6b665f;line-height:1.9;margin:0 0 34px;}
.jitsumu-topic-grid{
  display:grid;grid-template-columns:repeat(4,1fr);gap:12px;
}
.jitsumu-topic-nav-item{
  display:block;background:var(--bg);border:1px solid #eee2cf;border-radius:10px;
  padding:16px 10px;font-size:.86rem;font-weight:700;color:#4a4540;
  transition:border-color .15s;
}
a.jitsumu-topic-nav-item:hover{border-color:var(--primary);color:var(--primary);}
.jitsumu-topic-nav-item.is-current{
  background:var(--primary);border-color:var(--primary);color:#fff;
}

/* footer */
.toi-footer{padding:34px 24px;background:#fff;border-top:1px solid #eee2cf;}
.toi-footer-inner{
  max-width:1200px;margin:0 auto;
  display:flex;flex-wrap:wrap;gap:16px;align-items:center;justify-content:space-between;
}
.toi-footer-copy{font-size:.82rem;color:#6b665f;margin:0;}
.toi-footer-links{display:flex;gap:22px;flex-wrap:wrap;}
.toi-footer-links a{font-size:.85rem;font-weight:700;color:#4a4540;}

/* ===== Responsive ===== */
@media (max-width:880px){
  .jitsumu-topic-grid{grid-template-columns:repeat(3,1fr);}
  .design-grid{grid-template-columns:repeat(3,1fr);}
  .radiate-grid{grid-template-columns:repeat(2,1fr);}
}
@media (max-width:760px){
  .toi-header-inner{flex-wrap:wrap;justify-content:space-between;padding:12px 18px;row-gap:10px;}
  .toi-header-logo{order:1;font-size:.95rem;}
  .toi-header-contact{order:2;font-size:.75rem;padding:9px 14px;}
  .toi-header-breadcrumb{
    order:3;flex-basis:100%;width:100%;
    justify-content:center;flex-wrap:wrap;
    white-space:normal;text-align:center;row-gap:4px;
  }
  .toi-header-breadcrumb a{white-space:normal;}
  .toi-header-breadcrumb .crumb-current{
    white-space:normal;overflow:visible;text-overflow:clip;
  }
  .fv-title{font-size:2.3rem;}
  .sec-heading{font-size:1.35rem;}
  .compare-grid{grid-template-columns:1fr;}
  .qa-grid{grid-template-columns:1fr;}
  .info-grid{grid-template-columns:1fr;}
  .issue-list, .check-list{grid-template-columns:1fr;}
  .perspective-row{flex-direction:column;}
  .perspective-col.lv-1,.perspective-col.lv-2,.perspective-col.lv-3{margin-bottom:16px;}
  .design-grid{grid-template-columns:repeat(2,1fr);}
  .radiate-grid{grid-template-columns:1fr;}
  .network-row{gap:8px;}
  .final-cta h2{font-size:1.25rem;}
}
@media (max-width:600px){
  .jitsumu-topic-grid{grid-template-columns:repeat(2,1fr);}
  .toi-footer-inner{flex-direction:column;align-items:center;text-align:center;}
}