/* Aboutページだけに閉じ込める */
.mb-about{
  /* DESIGN SYSTEM */
  --cream:#F9F5EE;
  --sand:#EDE7D9;
  --warm-brown:#8D6E5A;
  --terracotta:#C4714F;
  --sage:#7A9E87;
  --sage-light:#B5CEBC;
  --dark:#2D2926;
  --text-main:#3E3530;
  --text-sub:#7A6F69;
  --text-light:#A89F9A;
  --white:#FFFFFF;
  --font-serif:'Noto Serif JP','Times New Roman',serif;
  --font-sans:'Noto Sans JP',sans-serif;
  --radius-sm:8px;
  --radius-md:16px;
  --radius-lg:28px;
  --shadow:0 4px 24px rgba(45,41,38,0.08);
  --shadow-lg:0 12px 48px rgba(45,41,38,0.14);

  background:#F0EBE2;
  font-family:var(--font-sans);
  color:var(--text-main);

  /* fixed note-bar + header offset */
  padding-top: calc(var(--mb-note-h, 40px) + var(--mb-header-h, 0px));
}

.mb-about *{ box-sizing:border-box; }

/* NOTE BAR */
.mb-about .note-bar{
  position:fixed;
  top:0; left:0; right:0;
  z-index:9999;
  background:rgba(45,41,38,0.93);
  backdrop-filter:blur(8px);
  display:flex;
  align-items:center;
  justify-content:center;
  gap:16px;
  padding:10px 24px;
  font-family:var(--font-sans);
  font-size:12px;
  color:rgba(255,255,255,0.6);
  letter-spacing:0.04em;
}
.mb-about .note-bar strong{ color:var(--terracotta); font-weight:600; }
.mb-about .note-bar span{ color:rgba(255,255,255,0.25); }

/* HERO */
.mb-about .a-hero{
  background:var(--cream);
  min-height:calc(100vh - 100px);
  display:grid;
  grid-template-columns:1fr 1fr;
  align-items:center;
  overflow:hidden;
  position:relative;
}
.mb-about .a-hero::before{
  content:'';
  position:absolute;
  bottom:-80px; right:-80px;
  width:400px; height:400px;
  background:radial-gradient(circle, rgba(196,113,79,0.07) 0%, transparent 70%);
  pointer-events:none;
}
.mb-about .a-hero-left{
  padding:80px 64px 80px 80px;
  display:flex;
  flex-direction:column;
  justify-content:center;
}
.mb-about .a-hero-eyebrow{
  font-size:11px;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--terracotta);
  font-weight:500;
  margin-bottom:24px;
}
.mb-about .a-hero-headline{
  font-family:var(--font-serif);
  font-size:clamp(36px,4vw,54px);
  font-weight:400;
  line-height:1.6;
  color:var(--dark);
  margin-bottom:28px;
}
.mb-about .a-hero-headline em{ font-style:normal; color:var(--terracotta); }
.mb-about .a-hero-sub{
  font-size:15px;
  line-height:1.9;
  color:var(--text-sub);
  max-width:380px;
  margin-bottom:48px;
}
.mb-about .a-hero-cta-group{ display:flex; gap:12px; align-items:center; }

.mb-about .btn-primary{
  background:var(--terracotta);
  color:white;
  border:none;
  border-radius:28px;
  padding:14px 36px;
  font-size:14px;
  font-family:var(--font-sans);
  font-weight:500;
  cursor:pointer;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition:all 0.25s;
  box-shadow:0 4px 20px rgba(196,113,79,0.3);
}
.mb-about .btn-primary:hover{
  transform:translateY(-2px);
  box-shadow:0 8px 28px rgba(196,113,79,0.4);
}
.mb-about .btn-secondary{
  color:var(--text-sub);
  font-size:13px;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:6px;
  transition:color 0.2s;
}
.mb-about .btn-secondary:hover{ color:var(--dark); }
.mb-about .btn-secondary::after{ content:'→'; }

.mb-about .a-hero-right{
  padding:60px 80px 60px 40px;
  display:flex;
  flex-direction:column;
  align-items:center;
  gap:16px;
}
.mb-about .a-photo-label{
  font-size:11px;
  letter-spacing:0.15em;
  color:var(--text-light);
  text-transform:uppercase;
  align-self:flex-start;
}
.mb-about .a-photo-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:10px;
  width:100%;
  max-width:380px;
}
.mb-about .a-photo-cell{
  aspect-ratio:1;
  border-radius:var(--radius-sm);
  overflow:hidden;
  position:relative;
  background:var(--sand);
  box-shadow:var(--shadow);
  transition:transform 0.3s;
}
.mb-about .a-photo-cell:hover{ transform:scale(1.04); z-index:2; }
.mb-about .a-photo-cell .photo-inner{
  width:100%; height:100%;
  display:flex; align-items:center; justify-content:center;
  font-size:28px;
}
.mb-about .mb-about__grid-link{ display:block; width:100%; height:100%; }
.mb-about .mb-about__grid-img{
  width:100%;
  height:100%;
  object-fit:cover;
  display:block;
}
.mb-about .a-photo-caption{
  font-size:12px;
  color:var(--text-light);
  align-self:flex-end;
  font-style:italic;
}

/* CONCEPT STRIP */
.mb-about .a-concept{
  background:var(--dark);
  color:white;
  padding:64px 80px;
  display:flex;
  align-items:center;
  gap:80px;
}
.mb-about .a-concept-num{
  font-family:var(--font-serif);
  font-size:120px;
  font-weight:300;
  color:var(--terracotta);
  opacity:0.35;
  line-height:1;
  flex-shrink:0;
}
.mb-about .a-concept-title{
  font-family:var(--font-serif);
  font-size:28px;
  font-weight:400;
  margin-bottom:16px;
}
.mb-about .a-concept-desc{
  font-size:15px;
  line-height:2;
  color:rgba(255,255,255,0.65);
  max-width:560px;
}
.mb-about .a-concept-tags{ display:flex; gap:10px; margin-top:20px; flex-wrap:wrap; }
.mb-about .tag{
  background:rgba(255,255,255,0.08);
  border:1px solid rgba(255,255,255,0.15);
  color:rgba(255,255,255,0.7);
  padding:6px 14px;
  border-radius:20px;
  font-size:12px;
}

/* SECTIONS */
.mb-about .a-section{ padding:100px 80px; background:var(--cream); }
.mb-about .a-section.alt{ background:var(--sand); }
.mb-about .section-tag{
  display:inline-block;
  font-size:11px;
  letter-spacing:0.2em;
  text-transform:uppercase;
  color:var(--terracotta);
  font-weight:500;
  margin-bottom:16px;
}
.mb-about .section-title{
  font-family:var(--font-serif);
  font-size:clamp(28px,3vw,40px);
  font-weight:400;
  color:var(--dark);
  margin-bottom:60px;
  line-height:1.5;
}

.mb-about .a-use-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:28px; }
.mb-about .a-use-card{
  background:white;
  border-radius:var(--radius-md);
  padding:36px 28px;
  box-shadow:var(--shadow);
  transition:transform 0.25s, box-shadow 0.25s;
  position:relative;
  overflow:hidden;
}
.mb-about .a-use-card::before{
  content:'';
  position:absolute;
  top:0; left:0; right:0;
  height:3px;
  background:var(--sage);
}
.mb-about .a-use-card:hover{ transform:translateY(-4px); box-shadow:var(--shadow-lg); }
.mb-about .a-use-icon{ font-size:36px; margin-bottom:20px; display:block; }
.mb-about .a-use-title{
  font-family:var(--font-serif);
  font-size:17px;
  font-weight:500;
  color:var(--dark);
  margin-bottom:12px;
  line-height:1.5;
}
.mb-about .a-use-desc{ font-size:13px; line-height:1.9; color:var(--text-sub); }

/* WHY */
.mb-about .why-section{
  background:var(--sand);
  padding:100px 80px;
  position:relative;
  overflow:hidden;
}
.mb-about .why-section::before{
  content:'';
  position:absolute;
  top:-120px; right:-120px;
  width:500px; height:500px;
  background:radial-gradient(circle, rgba(122,158,135,0.1) 0%, transparent 65%);
  pointer-events:none;
}
.mb-about .why-header{
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:80px;
  align-items:end;
  margin-bottom:64px;
}
.mb-about .why-header-right{ padding-bottom:4px; }
.mb-about .why-lead{
  font-family:var(--font-serif);
  font-size:clamp(13px,1.2vw,16px);
  line-height:2.1;
  color:var(--text-sub);
  border-left:3px solid var(--sage);
  padding-left:24px;
}
.mb-about .why-cards{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:3px;
  border-radius:var(--radius-md);
  overflow:hidden;
}
.mb-about .why-card{
  background:white;
  padding:48px 36px 44px;
  position:relative;
  transition:background 0.25s;
}
.mb-about .why-card:hover{ background:#FDFAF7; }
.mb-about .why-card-num{
  font-family:var(--font-serif);
  font-size:72px;
  font-weight:300;
  color:var(--terracotta);
  opacity:0.12;
  line-height:1;
  position:absolute;
  top:20px; right:24px;
}
.mb-about .why-card-icon{ font-size:40px; margin-bottom:24px; display:block; }
.mb-about .why-card-title{
  font-family:var(--font-serif);
  font-size:20px;
  font-weight:500;
  color:var(--dark);
  line-height:1.5;
  margin-bottom:16px;
}
.mb-about .why-card-title em{
  font-style:normal;
  color:var(--terracotta);
  font-size:13px;
  font-family:var(--font-sans);
  display:block;
  letter-spacing:0.05em;
  margin-bottom:6px;
  font-weight:500;
}
.mb-about .why-card-desc{ font-size:13px; line-height:2; color:var(--text-sub); }
.mb-about .why-card-accent{
  margin-top:24px;
  font-size:12px;
  color:var(--sage);
  font-weight:600;
  display:flex;
  align-items:center;
  gap:6px;
}
.mb-about .why-card-accent::before{
  content:'';
  display:inline-block;
  width:20px;
  height:1.5px;
  background:var(--sage);
}
.mb-about .why-quote-strip{
  margin-top:3px;
  background:var(--dark);
  border-radius:0 0 var(--radius-md) var(--radius-md);
  padding:36px 48px;
  display:flex;
  align-items:center;
  gap:40px;
}
.mb-about .why-quote-icon{ font-size:36px; flex-shrink:0; }
.mb-about .why-quote-text{
  font-family:var(--font-serif);
  font-size:clamp(16px,1.8vw,22px);
  font-weight:400;
  color:white;
  line-height:1.7;
  flex:1;
}
.mb-about .why-quote-text em{ font-style:normal; color:var(--sage-light); }
.mb-about .why-quote-cta{
  background:var(--terracotta);
  color:white;
  text-decoration:none;
  border-radius:24px;
  padding:12px 28px;
  font-size:13px;
  font-weight:500;
  white-space:nowrap;
  transition:opacity 0.2s;
  flex-shrink:0;
}
.mb-about .why-quote-cta:hover{ opacity:0.85; }

.mb-about .anno-badge{
  display:inline-flex;
  align-items:center;
  gap:6px;
  background:rgba(196,113,79,0.12);
  border:1px solid rgba(196,113,79,0.3);
  color:var(--terracotta);
  font-size:11px;
  font-weight:600;
  padding:4px 10px;
  border-radius:12px;
  margin-bottom:12px;
  letter-spacing:0.04em;
}
.mb-about .anno-badge.new{
  background:rgba(122,158,135,0.12);
  border-color:rgba(122,158,135,0.3);
  color:var(--sage);
}

/* HOW */
.mb-about .a-how{ background:var(--cream); padding:100px 80px; }
.mb-about .a-steps{ display:grid; grid-template-columns:repeat(4,1fr); gap:24px; margin-top:60px; }
.mb-about .a-step{ text-align:center; padding:32px 20px; position:relative; }
.mb-about .a-step::after{
  content:'→';
  position:absolute;
  right:-12px; top:50%;
  transform:translateY(-50%);
  color:var(--text-light);
  font-size:20px;
}
.mb-about .a-step:last-child::after{ display:none; }
.mb-about .a-step-num{
  width:48px; height:48px;
  border-radius:50%;
  border:2px solid var(--sage);
  display:flex;
  align-items:center;
  justify-content:center;
  font-family:var(--font-serif);
  font-size:18px;
  color:var(--sage);
  margin:0 auto 20px;
}
.mb-about .a-step-title{ font-size:14px; font-weight:500; color:var(--dark); margin-bottom:10px; line-height:1.5; }
.mb-about .a-step-desc{ font-size:12px; color:var(--text-sub); line-height:1.8; }
.mb-about .a-step.step-post .a-step-num{ border-color:var(--terracotta); color:var(--terracotta); }
.mb-about .a-step.step-post .a-step-title{ color:var(--terracotta); }

/* CTA */
.mb-about .a-cta{
  background:linear-gradient(135deg, var(--warm-brown) 0%, var(--terracotta) 100%);
  padding:120px 80px;
  text-align:center;
  color:white;
}
.mb-about .a-cta-eyebrow{
  font-size:11px;
  letter-spacing:0.25em;
  text-transform:uppercase;
  color:rgba(255,255,255,0.65);
  margin-bottom:24px;
}
.mb-about .a-cta-title{
  font-family:var(--font-serif);
  font-size:clamp(28px,4vw,48px);
  font-weight:400;
  margin-bottom:20px;
  line-height:1.6;
}
.mb-about .a-cta-sub{
  font-size:15px;
  color:rgba(255,255,255,0.75);
  max-width:480px;
  margin:0 auto 48px;
  line-height:1.9;
}
.mb-about .btn-white{
  background:white;
  color:var(--terracotta);
  border:none;
  border-radius:28px;
  padding:16px 48px;
  font-size:15px;
  font-family:var(--font-sans);
  font-weight:500;
  cursor:pointer;
  text-decoration:none;
  display:inline-flex;
  align-items:center;
  gap:8px;
  transition:all 0.25s;
  box-shadow:0 8px 32px rgba(0,0,0,0.2);
}
.mb-about .btn-white:hover{
  transform:translateY(-2px);
  box-shadow:0 14px 40px rgba(0,0,0,0.25);
}

/* RESPONSIVE */
@media (max-width: 900px){
  .mb-about .a-hero{ grid-template-columns:1fr; min-height:auto; }
  .mb-about .a-hero-left{ padding:60px 40px; }
  .mb-about .a-hero-right{ padding:40px; }
  .mb-about .a-use-grid{ grid-template-columns:1fr; }
  .mb-about .a-steps{ grid-template-columns:1fr 1fr; }
  .mb-about .why-cards{ grid-template-columns:1fr; }
  .mb-about .why-header{ grid-template-columns:1fr; gap:32px; }
  .mb-about .why-quote-strip{ flex-direction:column; text-align:center; }
  .mb-about .a-section,
  .mb-about .a-how,
  .mb-about .why-section{ padding:72px 40px; }
}
.mb-about{
  background:#F9F5EE;
}

/* スマホでは最上部のNOTE BARを消して、通常ヘッダーだけにする */
@media (max-width: 900px){
  .mb-about .note-bar{
    display:none !important;
  }

  /* NOTE BAR分の余白を消す（これが残ると上が空く） */
  .mb-about{
    padding-top: var(--mb-header-h, 0px) !important;
  }
}

.mb-about .note-bar{ display:none !important; }
.mb-about{ padding-top: var(--mb-header-h, 0px) !important; }

@media (max-width: 900px){

  /* 9枚コンセプト（黒背景）をスマホで読みやすく */
  .mb-about .a-concept{
    padding: 48px 22px;          /* 左右余白を適正化 */
    flex-direction: column;      /* 1カラム化 */
    align-items: flex-start;
    gap: 18px;
  }

  /* 大きい「9」は装飾として上に置く＆小さく */
  .mb-about .a-concept-num{
    font-size: 72px;
    opacity: 0.18;
    margin: 0;
  }

  /* 右側（本文）の横幅を最大化 */
  .mb-about .a-concept-body{
    width: 100%;
  }

  .mb-about .a-concept-title{
    font-size: 22px;
    line-height: 1.5;
    margin-bottom: 10px;
  }

  .mb-about .a-concept-desc{
    max-width: none;             /* 変な制限を外す */
    font-size: 14px;
    line-height: 2.0;
  }

  .mb-about .a-concept-tags{
    gap: 8px;
  }
}