/* =====================================================
   井戸水クーラー.com — style.css
   ===================================================== */

/* ---------- Custom Properties ---------- */
:root {
  --blue:       #0EA5E9;
  --blue-dark:  #0369A1;
  --blue-deeper:#024F7A;
  --navy:       #1E293B;
  --navy-light: #334155;
  --green:      #10B981;
  --green-dark: #059669;
  --amber:      #F59E0B;
  --amber-dark: #D97706;
  --white:      #FFFFFF;
  --gray-50:    #F8FAFC;
  --gray-100:   #F1F5F9;
  --gray-200:   #E2E8F0;
  --gray-400:   #94A3B8;
  --gray-600:   #475569;
  --text:       #1E293B;
  --text-light: #475569;
  --border:     #E2E8F0;
  --radius:     12px;
  --radius-lg:  20px;
  --shadow-sm:  0 2px 8px rgba(0,0,0,0.06);
  --shadow:     0 4px 20px rgba(0,0,0,0.10);
  --shadow-lg:  0 12px 40px rgba(0,0,0,0.14);
  --transition: 0.3s ease;
}

/* ---------- Reset & Base ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'Noto Sans JP', 'Hiragino Sans', 'Meiryo', sans-serif;
  color: var(--text);
  line-height: 1.8;
  background: var(--white);
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
ul { list-style: none; }

/* ---------- Typography ---------- */
.section-label {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--blue);
  background: rgba(14,165,233,0.10);
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 14px;
}
.section-title {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 900;
  color: var(--navy);
  line-height: 1.3;
  letter-spacing: -0.01em;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 1rem;
  color: var(--text-light);
  max-width: 640px;
  line-height: 1.9;
}
.text-center { text-align: center; }
.text-center .section-desc { margin: 0 auto; }

/* ---------- Layout ---------- */
.container { max-width: 1080px; margin: 0 auto; padding: 0 24px; }
section { padding: 96px 24px; }
section:nth-child(odd) { background: var(--white); }
section:nth-child(even) { background: var(--gray-50); }
.section-head { margin-bottom: 56px; }

/* ---------- Buttons ---------- */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
  padding: 16px 36px;
  border-radius: 50px;
  box-shadow: 0 6px 24px rgba(14,165,233,0.4);
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.03em;
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(14,165,233,0.5); }
.btn-primary.large { font-size: 1.1rem; padding: 20px 48px; }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  border: 2px solid rgba(255,255,255,0.7);
  color: var(--white);
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 50px;
  transition: background var(--transition);
}
.btn-ghost:hover { background: rgba(255,255,255,0.15); }

/* ---------- Header ---------- */
#site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  height: 68px;
  display: flex;
  align-items: center;
  padding: 0 24px;
  transition: box-shadow var(--transition);
}
#site-header.scrolled { box-shadow: var(--shadow); }
.header-inner {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.site-logo {
  font-size: 1.15rem;
  font-weight: 900;
  color: var(--navy);
  white-space: nowrap;
  flex-shrink: 0;
}
.site-logo span { color: var(--blue); }
.header-nav { display: flex; gap: 28px; align-items: center; }
.header-nav a {
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-light);
  white-space: nowrap;
  transition: color var(--transition);
  position: relative;
}
.header-nav a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 0;
  height: 2px;
  background: var(--blue);
  transform: scaleX(0);
  transition: transform var(--transition);
}
.header-nav a:hover { color: var(--blue); }
.header-nav a:hover::after { transform: scaleX(1); }
.header-cta {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white) !important;
  font-size: 0.82rem !important;
  font-weight: 700 !important;
  padding: 10px 22px;
  border-radius: 50px;
  box-shadow: 0 4px 16px rgba(14,165,233,0.35);
  white-space: nowrap;
  flex-shrink: 0;
}
.header-cta:hover { opacity: 0.9; transform: translateY(-1px); }
.header-cta::after { display: none !important; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  background: none;
  border: none;
  cursor: pointer;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
#hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 100px 24px 64px;
  background: linear-gradient(150deg, #0C1A2E 0%, #0D3053 40%, #0B4F72 70%, #0369A1 100%);
}
.hero-bg {
  position: absolute;
  inset: 0;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 820px;
  text-align: center;
}
.hero-badges {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 28px;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.3);
  color: rgba(255,255,255,0.95);
  font-size: 0.78rem;
  font-weight: 700;
  padding: 5px 14px;
  border-radius: 20px;
  backdrop-filter: blur(4px);
}
.hero-badge.green { background: rgba(16,185,129,0.2); border-color: rgba(16,185,129,0.5); color: #6EE7B7; }
.hero-catch {
  font-size: clamp(2rem, 5.5vw, 3.6rem);
  font-weight: 900;
  color: var(--white);
  line-height: 1.25;
  letter-spacing: -0.02em;
  margin-bottom: 22px;
}
.hero-catch .highlight { color: #38BDF8; }
.hero-sub {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: rgba(255,255,255,0.78);
  line-height: 1.9;
  margin-bottom: 40px;
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}
.hero-cta-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.hero-stats {
  display: flex;
  gap: 32px;
  justify-content: center;
  margin-top: 56px;
  flex-wrap: wrap;
}
.hero-stat {
  text-align: center;
  padding: 18px 24px;
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius);
  backdrop-filter: blur(6px);
  min-width: 120px;
}
.hero-stat .stat-num {
  font-size: 2rem;
  font-weight: 900;
  color: #38BDF8;
  line-height: 1;
}
.hero-stat .stat-num small { font-size: 1rem; }
.hero-stat .stat-label { font-size: 0.72rem; color: rgba(255,255,255,0.6); margin-top: 4px; letter-spacing: 0.04em; }

/* ---------- Problem Section ---------- */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 48px;
}
.problem-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px 28px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.problem-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.problem-card .card-icon {
  width: 52px;
  height: 52px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.problem-card .card-icon.blue { background: rgba(14,165,233,0.1); }
.problem-card .card-icon.green { background: rgba(16,185,129,0.1); }
.problem-card .card-icon.amber { background: rgba(245,158,11,0.1); }
.problem-card h3 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--gray-100);
}
.problem-card ul { display: flex; flex-direction: column; gap: 8px; }
.problem-card li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.6;
}
.problem-card li::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
  margin-top: 8px;
}

/* ---------- Solution / Mechanism ---------- */
.mechanism-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}
.mechanism-text h2 { margin-bottom: 16px; }
.mechanism-text p { color: var(--text-light); margin-bottom: 20px; }
.mechanism-highlight {
  background: linear-gradient(135deg, rgba(14,165,233,0.08), rgba(3,105,161,0.06));
  border: 1px solid rgba(14,165,233,0.25);
  border-left: 4px solid var(--blue);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 18px 22px;
  margin-top: 28px;
  font-size: 0.95rem;
  color: var(--blue-dark);
  font-weight: 600;
  line-height: 1.7;
}
.flow-diagram {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 32px;
  box-shadow: var(--shadow);
}

/* ---------- Reasons Section ---------- */
.reasons-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.reason-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.reason-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--blue-dark));
}
.reason-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.reason-num {
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--blue);
  letter-spacing: 0.1em;
  margin-bottom: 12px;
}
.reason-icon { margin: 0 auto 16px; }
.reason-card h3 { font-size: 0.9rem; font-weight: 800; color: var(--navy); line-height: 1.4; margin-bottom: 8px; }
.reason-card p { font-size: 0.78rem; color: var(--text-light); line-height: 1.7; }
.reason-card .big-stat { font-size: 2rem; font-weight: 900; color: var(--amber); line-height: 1; margin-bottom: 4px; }

/* ---------- Cost Simulation ---------- */
.cost-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
  align-items: start;
  margin-top: 48px;
}
.cost-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.cost-table thead { background: var(--navy); color: var(--white); }
.cost-table th { padding: 14px 16px; font-size: 0.85rem; font-weight: 700; text-align: center; }
.cost-table td { padding: 14px 16px; font-size: 0.9rem; border-bottom: 1px solid var(--border); text-align: center; }
.cost-table td:first-child { text-align: left; font-weight: 600; color: var(--navy); }
.cost-table tr:nth-child(even) td { background: var(--gray-50); }
.cost-table .highlight-col { color: var(--green-dark); font-weight: 800; }
.cost-table .red-col { color: #EF4444; }
.cost-table .saving-row td { background: rgba(16,185,129,0.08) !important; font-weight: 800; }
.cost-table .saving-row .saving-num { color: var(--green-dark); font-size: 1.1rem; }
.cost-note { font-size: 0.78rem; color: var(--gray-400); margin-top: 12px; line-height: 1.7; }

/* Bar Chart */
.cost-chart { }
.cost-chart h3 { font-size: 1rem; font-weight: 800; color: var(--navy); margin-bottom: 24px; }
.bar-group { margin-bottom: 28px; }
.bar-label { font-size: 0.82rem; font-weight: 700; color: var(--navy); margin-bottom: 6px; display: flex; justify-content: space-between; align-items: center; }
.bar-label .bar-val { font-size: 1rem; font-weight: 900; }
.bar-track { height: 36px; background: var(--gray-100); border-radius: 8px; overflow: hidden; }
.bar-fill {
  height: 100%;
  border-radius: 8px;
  display: flex;
  align-items: center;
  padding-left: 12px;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--white);
  transition: width 1.2s cubic-bezier(0.4,0,0.2,1);
  width: 0;
}
.bar-fill.ac { background: linear-gradient(90deg, #EF4444, #DC2626); }
.bar-fill.ido { background: linear-gradient(90deg, var(--green), var(--green-dark)); }
.bar-fill.animate { width: var(--target-width); }

/* ---------- Use Cases ---------- */
.usecase-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 20px;
  margin-top: 48px;
}
.usecase-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 18px 24px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.usecase-card:hover { transform: translateY(-4px); box-shadow: var(--shadow); }
.usecase-card .uc-icon { margin: 0 auto 16px; }
.usecase-card h3 { font-size: 0.88rem; font-weight: 800; color: var(--navy); margin-bottom: 8px; }
.usecase-card p { font-size: 0.78rem; color: var(--text-light); line-height: 1.7; }

/* ---------- Spec Table ---------- */
.spec-table {
  width: 100%;
  border-collapse: collapse;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  margin-top: 48px;
}
.spec-table th {
  background: var(--navy);
  color: var(--white);
  padding: 14px 20px;
  font-size: 0.85rem;
  font-weight: 700;
  text-align: left;
  width: 30%;
}
.spec-table td {
  padding: 14px 20px;
  font-size: 0.9rem;
  color: var(--text);
  border-bottom: 1px solid var(--border);
}
.spec-table tr:nth-child(even) td { background: var(--gray-50); }
.spec-table .inquiry-cell { color: var(--blue); font-weight: 700; }
.spec-notes { margin-top: 16px; display: flex; flex-direction: column; gap: 6px; }
.spec-notes p { font-size: 0.82rem; color: var(--text-light); display: flex; align-items: flex-start; gap: 6px; }
.spec-notes p::before { content: '※'; flex-shrink: 0; color: var(--amber); font-weight: 700; }

/* ---------- Process ---------- */
.process-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 56px;
  position: relative;
}
.process-steps::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(12.5%);
  right: calc(12.5%);
  height: 2px;
  background: linear-gradient(90deg, var(--blue), var(--green));
  z-index: 0;
}
.process-step {
  text-align: center;
  padding: 0 12px 32px;
  position: relative;
  z-index: 1;
}
.step-circle {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white);
  font-size: 1.2rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  box-shadow: 0 4px 16px rgba(14,165,233,0.4);
  position: relative;
}
.step-circle::after {
  content: '';
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px dashed rgba(14,165,233,0.3);
}
.process-step h3 { font-size: 0.88rem; font-weight: 800; color: var(--navy); margin-bottom: 6px; }
.process-step p { font-size: 0.78rem; color: var(--text-light); line-height: 1.6; }
.process-row2 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  margin-top: 0;
  position: relative;
}
.process-row2::before {
  content: '';
  position: absolute;
  top: 40px;
  left: calc(12.5%);
  right: calc(12.5%);
  height: 2px;
  background: linear-gradient(90deg, var(--green), var(--blue-dark));
  z-index: 0;
}

/* ---------- FAQ ---------- */
.faq-list { display: flex; flex-direction: column; gap: 12px; margin-top: 48px; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  gap: 16px;
  transition: background var(--transition);
}
.faq-question:hover { background: var(--gray-50); }
.faq-q-text {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.5;
}
.faq-q-text .q-mark {
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--blue);
  flex-shrink: 0;
  margin-top: -1px;
}
.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  background: var(--gray-100);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition), background var(--transition);
}
.faq-item.open .faq-icon { transform: rotate(180deg); background: var(--blue); }
.faq-item.open .faq-icon svg path { stroke: white; }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
}
.faq-item.open .faq-answer { max-height: 400px; }
.faq-answer-inner {
  padding: 0 24px 22px 24px;
  padding-left: 60px;
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.85;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}

/* ---------- Contact Form ---------- */
#contact {
  background: linear-gradient(150deg, #0C1A2E, #0D3053, #0369A1);
  padding: 96px 24px;
}
#contact .section-label { color: #38BDF8; background: rgba(56,189,248,0.15); }
#contact .section-title { color: var(--white); }
#contact .section-desc { color: rgba(255,255,255,0.7); }
.contact-form-wrap {
  max-width: 720px;
  margin: 48px auto 0;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-lg);
  padding: 48px;
  backdrop-filter: blur(8px);
}
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.form-grid .full { grid-column: 1 / -1; }
.form-group { display: flex; flex-direction: column; gap: 6px; }
.form-group label {
  font-size: 0.83rem;
  font-weight: 700;
  color: rgba(255,255,255,0.85);
  display: flex;
  align-items: center;
  gap: 6px;
}
.form-group label .required {
  font-size: 0.7rem;
  background: #EF4444;
  color: white;
  padding: 1px 6px;
  border-radius: 4px;
}
.form-group label .optional {
  font-size: 0.7rem;
  background: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
  padding: 1px 6px;
  border-radius: 4px;
}
.form-group input,
.form-group select,
.form-group textarea {
  background: rgba(255,255,255,0.08);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 8px;
  padding: 12px 16px;
  font-size: 0.9rem;
  color: var(--white);
  font-family: inherit;
  transition: border-color var(--transition), background var(--transition);
  outline: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(255,255,255,0.3); }
.form-group select { cursor: pointer; }
.form-group select option { background: var(--navy); color: var(--white); }
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue);
  background: rgba(14,165,233,0.1);
}
.form-group input.error,
.form-group select.error,
.form-group textarea.error { border-color: #EF4444; }
.form-group .error-msg { font-size: 0.78rem; color: #FCA5A5; display: none; }
.form-group .error-msg.show { display: block; }
.form-group textarea { resize: vertical; min-height: 120px; }
.form-divider {
  grid-column: 1 / -1;
  border: none;
  border-top: 1px solid rgba(255,255,255,0.15);
  margin: 8px 0;
}
.privacy-check {
  grid-column: 1 / -1;
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.75);
  cursor: pointer;
  line-height: 1.6;
}
.privacy-check input { width: 18px; height: 18px; flex-shrink: 0; margin-top: 2px; cursor: pointer; accent-color: var(--blue); }
.privacy-check a { color: #38BDF8; text-decoration: underline; }
.form-submit { grid-column: 1 / -1; text-align: center; margin-top: 8px; }
.btn-submit {
  background: linear-gradient(135deg, var(--blue), var(--blue-dark));
  color: var(--white);
  font-size: 1.05rem;
  font-weight: 800;
  padding: 18px 56px;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  box-shadow: 0 6px 24px rgba(14,165,233,0.5);
  transition: transform var(--transition), box-shadow var(--transition);
  letter-spacing: 0.04em;
}
.btn-submit:hover { transform: translateY(-2px); box-shadow: 0 10px 32px rgba(14,165,233,0.6); }
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
  color: var(--white);
}
.form-success svg { margin: 0 auto 16px; }
.form-success h3 { font-size: 1.3rem; font-weight: 800; margin-bottom: 8px; }
.form-success p { color: rgba(255,255,255,0.7); }

/* ---------- Footer ---------- */
footer {
  background: var(--navy);
  color: rgba(255,255,255,0.6);
  padding: 40px 24px;
}
.footer-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  text-align: center;
}
.footer-logo { font-size: 1.1rem; font-weight: 900; color: var(--white); margin-bottom: 4px; }
.footer-logo span { color: var(--blue); }
.footer-links { display: flex; gap: 24px; flex-wrap: wrap; justify-content: center; }
.footer-links a { font-size: 0.82rem; color: rgba(255,255,255,0.55); transition: color var(--transition); }
.footer-links a:hover { color: var(--blue); }
.footer-copy { font-size: 0.78rem; }
.footer-operator { font-size: 0.78rem; color: rgba(255,255,255,0.4); }

/* ---------- Sub Pages (tokushoho / privacy) ---------- */
.sub-page { padding-top: 100px; min-height: 100vh; }
.sub-page .container { padding: 60px 24px 80px; max-width: 800px; }
.sub-page h1 { font-size: 1.8rem; font-weight: 900; color: var(--navy); margin-bottom: 8px; }
.sub-page .sub-date { font-size: 0.82rem; color: var(--text-light); margin-bottom: 40px; }
.sub-page h2 { font-size: 1.15rem; font-weight: 800; color: var(--navy); margin: 36px 0 12px; padding-left: 12px; border-left: 4px solid var(--blue); }
.sub-page p, .sub-page li { font-size: 0.9rem; color: var(--text-light); line-height: 1.9; margin-bottom: 8px; }
.sub-page ul { padding-left: 20px; }
.sub-page ul li { list-style: disc; }
.tokuho-table { width: 100%; border-collapse: collapse; margin-top: 8px; margin-bottom: 24px; }
.tokuho-table th { background: var(--gray-100); font-size: 0.85rem; font-weight: 700; color: var(--navy); padding: 12px 16px; text-align: left; border: 1px solid var(--border); width: 35%; }
.tokuho-table td { font-size: 0.88rem; color: var(--text); padding: 12px 16px; border: 1px solid var(--border); line-height: 1.8; }

/* Subpage layout (used in tokushoho.html / privacy.html) */
.subpage-main { padding-top: 88px; min-height: 80vh; background: var(--gray-50); }
.subpage-container { max-width: 820px; margin: 0 auto; padding: 56px 24px 80px; }
.subpage-title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 900;
  color: var(--navy);
  margin-bottom: 36px;
  padding-bottom: 16px;
  border-bottom: 3px solid var(--blue);
}
/* Legal / tokushoho table */
.legal-table { width: 100%; border-collapse: collapse; margin-bottom: 32px; }
.legal-table th {
  background: var(--gray-100);
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--navy);
  padding: 14px 18px;
  text-align: left;
  border: 1px solid var(--border);
  width: 32%;
  vertical-align: top;
}
.legal-table td {
  font-size: 0.88rem;
  color: var(--text);
  padding: 14px 18px;
  border: 1px solid var(--border);
  line-height: 1.85;
}
.legal-table a { color: var(--blue); }
.legal-note { font-size: 0.82rem; color: var(--text-light); margin-top: 12px; }
/* Privacy sections */
.privacy-intro { font-size: 0.92rem; color: var(--text-light); line-height: 1.9; margin-bottom: 36px; }
.privacy-section { margin-bottom: 32px; }
.privacy-section h2 {
  font-size: 1.05rem;
  font-weight: 800;
  color: var(--navy);
  padding-left: 12px;
  border-left: 4px solid var(--blue);
  margin-bottom: 12px;
}
.privacy-section p, .privacy-section li {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.9;
  margin-bottom: 6px;
}
.privacy-section ul { padding-left: 20px; }
.privacy-section ul li { list-style: disc; }
.privacy-contact {
  background: var(--gray-100);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-top: 8px;
  font-size: 0.88rem;
  color: var(--text);
  line-height: 1.9;
}
.privacy-contact a { color: var(--blue); }
/* Footer nav for subpages */
.footer-logo { display: flex; align-items: center; gap: 8px; font-size: 1rem; font-weight: 900; color: var(--white); }
.footer-nav { display: flex; gap: 20px; flex-wrap: wrap; justify-content: center; }
.footer-nav a { font-size: 0.82rem; color: rgba(255,255,255,0.55); transition: color var(--transition); }
.footer-nav a:hover { color: var(--blue); }
.footer-copy { font-size: 0.78rem; color: rgba(255,255,255,0.4); }

/* ---------- 井戸オーナー誘導バナー ---------- */
.ido-owner-banner {
  background: linear-gradient(135deg, #EFF6FF, #DBEAFE, #E0F2FE);
  border-top: 3px solid var(--blue);
  border-bottom: 3px solid var(--blue);
  padding: 18px 24px;
}
.ido-owner-inner {
  max-width: 1080px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 20px;
}
.ido-owner-icon { flex-shrink: 0; }
.ido-owner-text { flex: 1; }
.ido-owner-eyebrow {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue-dark);
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}
.ido-owner-msg {
  font-size: 0.93rem;
  color: var(--navy);
  line-height: 1.6;
  font-weight: 500;
}
.ido-owner-btn {
  flex-shrink: 0;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--blue);
  color: white;
  font-size: 0.88rem;
  font-weight: 800;
  padding: 12px 22px;
  border-radius: 50px;
  white-space: nowrap;
  transition: background var(--transition), transform var(--transition);
  box-shadow: 0 4px 16px rgba(14,165,233,0.35);
}
.ido-owner-btn:hover { background: var(--blue-dark); transform: translateX(3px); }

/* ---------- 課題提起（リデザイン）---------- */
.problem-dark {
  background: linear-gradient(160deg, #FFF8F0 0%, #FFFDF8 50%, #FFF3E0 100%);
  padding: 96px 24px 80px;
  position: relative;
  overflow: hidden;
}
.problem-bg-svg {
  position: absolute;
  inset: 0;
  pointer-events: none;
  opacity: 0.4;
}
.problem-header { text-align: center; margin-bottom: 64px; }
.amber-label {
  display: inline-block;
  background: #FEF3C7;
  color: #92400E;
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
  padding: 4px 14px;
  border-radius: 50px;
  border: 1px solid #FCD34D;
  margin-bottom: 16px;
}
.white-title { color: var(--navy); }
.problem-main-layout {
  display: grid;
  grid-template-columns: 220px 1fr;
  gap: 56px;
  align-items: center;
  max-width: 960px;
  margin: 0 auto;
}
.problem-thermo { display: flex; justify-content: center; }
.problem-items { display: flex; flex-direction: column; gap: 16px; }
.problem-item {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background: #FFFFFF;
  border: 1px solid #E2E8F0;
  border-left: 4px solid transparent;
  border-radius: 12px;
  padding: 20px 24px;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
  transition: box-shadow var(--transition), transform var(--transition);
}
.problem-item:hover { box-shadow: 0 8px 24px rgba(0,0,0,0.1); transform: translateX(4px); }
.problem-item:nth-child(1) { border-left-color: #EF4444; }
.problem-item:nth-child(2) { border-left-color: #F59E0B; }
.problem-item:nth-child(3) { border-left-color: #F97316; }
.problem-item:nth-child(4) { border-left-color: #10B981; }
.pi-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.pi-red   { background: #FEF2F2; color: #DC2626; }
.pi-amber { background: #FFFBEB; color: #D97706; }
.pi-orange{ background: #FFF7ED; color: #EA580C; }
.pi-green { background: #F0FDF4; color: #16A34A; }
.pi-body { flex: 1; }
.pi-main {
  font-size: 0.97rem;
  font-weight: 700;
  color: var(--navy);
  line-height: 1.65;
  margin-bottom: 4px;
}
.pi-main strong { color: #DC2626; font-weight: 900; }
.pi-sub {
  font-size: 0.82rem;
  color: #64748B;
  line-height: 1.6;
}
.problem-solve-bridge {
  text-align: center;
  margin-top: 56px;
  color: var(--navy);
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}
.bridge-arrow { animation: bounce-down 1.6s ease-in-out infinite; }
@keyframes bounce-down {
  0%,100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}
.blue-hl { color: #0369A1; font-weight: 900; }

/* ---------- Scroll Animations ---------- */
.fade-up { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.fade-up.visible { opacity: 1; transform: translateY(0); }
.fade-up.delay-1 { transition-delay: 0.1s; }
.fade-up.delay-2 { transition-delay: 0.2s; }
.fade-up.delay-3 { transition-delay: 0.3s; }
.fade-up.delay-4 { transition-delay: 0.4s; }

/* ---------- Inline CTA ---------- */
.inline-cta {
  background: linear-gradient(135deg, var(--blue-dark), var(--navy));
  padding: 56px 24px;
  text-align: center;
}
.inline-cta p { color: rgba(255,255,255,0.75); margin-bottom: 8px; font-size: 0.95rem; }
.inline-cta h2 { font-size: clamp(1.3rem, 3vw, 2rem); font-weight: 900; color: var(--white); margin-bottom: 28px; }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
  .reasons-grid { grid-template-columns: repeat(3, 1fr); }
  .usecase-grid { grid-template-columns: repeat(3, 1fr); }
  .process-steps, .process-row2 { grid-template-columns: repeat(4, 1fr); }
}

@media (max-width: 768px) {
  .ido-owner-inner { flex-wrap: wrap; gap: 12px; }
  .ido-owner-icon { display: none; }
  .ido-owner-btn { width: 100%; justify-content: center; }
  .sp-hide { display: none; }
  .problem-main-layout { grid-template-columns: 1fr; }
  .problem-thermo { display: none; }
  section { padding: 64px 20px; }
  .header-nav { display: none; position: fixed; top: 68px; left: 0; right: 0; background: white; flex-direction: column; padding: 16px 24px 24px; gap: 4px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow); z-index: 999; }
  .header-nav.open { display: flex; }
  .header-nav a { padding: 12px 0; border-bottom: 1px solid var(--gray-100); font-size: 0.95rem; }
  .header-nav a:last-child { border-bottom: none; }
  .header-cta { display: none; }
  .hamburger { display: flex; }
  .hero-catch { font-size: clamp(1.7rem, 7vw, 2.6rem); }
  .problem-grid { grid-template-columns: 1fr; }
  .mechanism-layout { grid-template-columns: 1fr; gap: 36px; }
  .reasons-grid { grid-template-columns: repeat(2, 1fr); }
  .cost-layout { grid-template-columns: 1fr; }
  .usecase-grid { grid-template-columns: repeat(2, 1fr); }
  .process-steps, .process-row2 { grid-template-columns: repeat(2, 1fr); }
  .process-steps::before, .process-row2::before { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 28px 20px; }
  .hero-stats { gap: 16px; }
  .hero-stat { padding: 12px 16px; min-width: 90px; }
}

@media (max-width: 480px) {
  .reasons-grid { grid-template-columns: 1fr; }
  .usecase-grid { grid-template-columns: 1fr; }
  .process-steps, .process-row2 { grid-template-columns: 1fr; }
  .hero-badges { gap: 6px; }
  .hero-cta-group { flex-direction: column; align-items: center; }
}