/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #7c3aed;
  --dark: #0f172a;
  --dark-2: #1e293b;
  --gray: #64748b;
  --gray-light: #f1f5f9;
  --border: #e2e8f0;
  --white: #ffffff;
  --success: #10b981;
  --font: 'Noto Sans JP', sans-serif;
  --radius: 12px;
  --shadow: 0 4px 24px rgba(0,0,0,.08);
  --shadow-lg: 0 8px 48px rgba(0,0,0,.12);
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--dark);
  line-height: 1.7;
  font-size: 16px;
  background: var(--white);
}

.container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 24px;
}

img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }

/* ===== TYPOGRAPHY ===== */
.section-title {
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: 900;
  line-height: 1.3;
  text-align: center;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}
.section-sub {
  text-align: center;
  color: var(--gray);
  font-size: 1.05rem;
  margin-bottom: 56px;
  line-height: 1.8;
}
.section-title--white, .section-sub--white { color: var(--white); }
.solution .section-title--white, .solution .section-sub--white { text-shadow: 0 2px 12px rgba(15,23,42,.18); }
.solution .section-sub--white { color: rgba(255,255,255,.95); }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 8px;
  font-weight: 700;
  font-size: 0.95rem;
  cursor: pointer;
  border: 2px solid transparent;
  transition: all .2s;
  white-space: nowrap;
}
.btn--primary {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.btn--primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(37,99,235,.35); }
.btn--outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn--outline:hover { background: var(--primary-light); }
.btn--ghost { background: rgba(255,255,255,.15); color: var(--white); border-color: rgba(255,255,255,.4); }
.btn--ghost:hover { background: rgba(255,255,255,.25); }
.btn--lg { padding: 16px 36px; font-size: 1.05rem; border-radius: 10px; }
.btn--block { width: 100%; }

/* ===== HEADER ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}
.header__inner {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 68px;
}
.logo {
  font-size: 1.4rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  color: var(--dark);
}
.logo span { color: var(--primary); }
.logo--white { color: var(--white); }
.logo--white span { color: #93c5fd; }
.header__nav {
  display: flex;
  gap: 28px;
  margin-left: auto;
}
.header__nav a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--gray);
  transition: color .2s;
}
.header__nav a:hover { color: var(--primary); }
.header__cta { display: flex; gap: 10px; }

/* ===== HERO (light theme) ===== */
.hero {
  background:
    radial-gradient(circle at 90% 20%, rgba(34,211,238,.12), transparent 50%),
    radial-gradient(circle at 10% 80%, rgba(59,130,246,.10), transparent 50%),
    linear-gradient(180deg, #f8fbff 0%, #eff6ff 100%);
  padding: 96px 0 80px;
  overflow: hidden;
  position: relative;
}
.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  padding-bottom: 32px;
}
.hero__badge {
  display: inline-block;
  background: linear-gradient(135deg, #dbeafe, #cffafe);
  color: #1d4ed8;
  font-size: 0.82rem;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: 100px;
  letter-spacing: .03em;
  margin-bottom: 24px;
  border: 1px solid rgba(59,130,246,.2);
}
.hero__title {
  font-size: clamp(2rem, 4.2vw, 3.4rem);
  font-weight: 900;
  color: #0f172a;
  line-height: 1.3;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
}
.highlight {
  background: linear-gradient(135deg, #2563eb, #06b6d4);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero__sub {
  color: #475569;
  font-size: 1.05rem;
  line-height: 1.95;
  margin-bottom: 32px;
}
.hero__buttons { display: flex; gap: 14px; flex-wrap: wrap; }
.hero__note { color: #64748b; font-size: 0.82rem; margin-top: 14px; }

/* Hero Screen Mock */
.hero__screen {
  background: #1e293b;
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 24px 80px rgba(0,0,0,.5);
  border: 1px solid #334155;
}
.screen__bar {
  background: #0f172a;
  padding: 12px 16px;
  display: flex;
  gap: 8px;
  align-items: center;
}
.screen__bar span {
  width: 12px; height: 12px;
  border-radius: 50%;
  background: #334155;
}
.screen__bar span:first-child { background: #ef4444; }
.screen__bar span:nth-child(2) { background: #f59e0b; }
.screen__bar span:nth-child(3) { background: #10b981; }
.screen__content { padding: 28px; }
.screen__row--title {
  font-size: 0.75rem;
  color: #94a3b8;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: .08em;
}
.screen__row--kw { display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 24px; }
.kw-tag {
  background: rgba(37,99,235,.2);
  color: #93c5fd;
  font-size: 0.78rem;
  padding: 4px 10px;
  border-radius: 6px;
  border: 1px solid rgba(37,99,235,.3);
}
.screen__progress { margin-bottom: 24px; }
.progress-bar {
  height: 6px;
  background: #334155;
  border-radius: 100px;
  overflow: hidden;
  margin-bottom: 8px;
}
.progress-fill {
  height: 100%;
  background: linear-gradient(90deg, #2563eb, #7c3aed);
  border-radius: 100px;
  animation: progress 2s ease-in-out infinite alternate;
}
@keyframes progress { from { width: 60%; } to { width: 90%; } }
.screen__progress span { font-size: 0.78rem; color: #94a3b8; }
.screen__stats { display: flex; gap: 16px; }
.stat {
  flex: 1;
  background: #0f172a;
  border-radius: 10px;
  padding: 14px;
  text-align: center;
}
.stat__num { display: block; font-size: 1.4rem; font-weight: 900; color: var(--white); }
.stat__label { display: block; font-size: 0.72rem; color: #64748b; margin-top: 4px; }

/* Hero Results Bar */
.hero__results {
  background: rgba(0,0,0,.3);
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
}
.results-list {
  display: flex;
  justify-content: center;
  gap: 48px;
  list-style: none;
  flex-wrap: wrap;
}
.results-list li { color: #cbd5e1; font-size: 0.9rem; }
.results-list strong { color: var(--white); margin-right: 6px; }

/* ===== LOGOS ===== */
.logos {
  padding: 48px 0;
  background: var(--gray-light);
  overflow: hidden;
}
.logos__label {
  text-align: center;
  font-size: 0.8rem;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 20px;
}
.logos__track { overflow: hidden; }
.logos__inner {
  display: flex;
  gap: 40px;
  animation: scrollLeft 20s linear infinite;
  width: max-content;
}
@keyframes scrollLeft {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}
.logo-item {
  white-space: nowrap;
  font-weight: 700;
  color: #94a3b8;
  font-size: 1rem;
  padding: 10px 24px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--white);
}

/* ===== WHY KEYWORD ===== */
.why { padding: 96px 0; background: var(--white); }
.why__grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 24px;
  align-items: center;
  margin-bottom: 56px;
}
.why-card {
  border-radius: var(--radius);
  padding: 32px;
}
.why-card--bad {
  background: #fff5f5;
  border: 2px solid #fecaca;
}
.why-card--good {
  background: #f0fdf4;
  border: 2px solid #bbf7d0;
}
.why-card__label {
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 12px;
}
.why-card--bad .why-card__label { color: #ef4444; }
.why-card--good .why-card__label { color: var(--success); }
.why-card__icon { font-size: 2rem; margin-bottom: 12px; }
.why-card h3 { font-size: 1.1rem; font-weight: 900; margin-bottom: 10px; line-height: 1.4; }
.why-card p { font-size: 0.88rem; color: var(--gray); line-height: 1.9; }
.why-arrow { font-size: 2rem; color: var(--gray); text-align: center; }

/* keyword example */
.why__example {
  background: var(--gray-light);
  border-radius: var(--radius);
  padding: 32px;
}
.why__example-label {
  text-align: center;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--gray);
  text-transform: uppercase;
  letter-spacing: .08em;
  margin-bottom: 24px;
}
.why__example-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 20px;
  align-items: center;
}
.example-col__head {
  font-size: 0.78rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-bottom: 12px;
  text-align: center;
}
.example-col--bad .example-col__head { color: #ef4444; }
.example-col--good .example-col__head { color: var(--success); }
.example-kw {
  font-size: 0.82rem;
  font-weight: 500;
  padding: 8px 14px;
  border-radius: 8px;
  margin-bottom: 8px;
}
.example-kw--bad { background: #fee2e2; color: #991b1b; text-decoration: line-through; }
.example-kw--good { background: #dcfce7; color: #166534; }
.example-arrow {
  text-align: center;
  font-size: 1.5rem;
  color: var(--gray);
  line-height: 1.4;
}
.example-arrow span { font-size: 0.75rem; color: var(--gray); display: block; }

/* hero KW list */
.screen__kw-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 20px; }
.screen__kw-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.78rem;
}
.screen__kw-row--win { background: rgba(16,185,129,.12); }
.screen__kw-row--skip { background: rgba(239,68,68,.08); opacity: .6; }
.kw-name { color: #e2e8f0; font-weight: 500; }
.kw-badge { font-size: 0.68rem; font-weight: 700; padding: 2px 8px; border-radius: 100px; white-space: nowrap; }
.kw-badge--easy { background: rgba(16,185,129,.2); color: #6ee7b7; }
.kw-badge--mid { background: rgba(245,158,11,.2); color: #fcd34d; }
.kw-badge--hard { background: rgba(239,68,68,.2); color: #fca5a5; }

/* flow step highlight (中央のメインステップ) */
.flow-step--highlight {
  background: linear-gradient(135deg, #ffffff 0%, #ecfeff 100%);
  border: 2px solid #22d3ee;
  box-shadow: 0 12px 32px rgba(34,211,238,.25);
}
.flow-step--highlight h3 { color: #0c4a6e; }

/* feature tag accent */
.feature-card__tag--accent {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  color: var(--white);
}

/* ===== PROBLEMS ===== */
.problems { padding: 96px 0 80px; }
.problems__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 48px;
}
.problem-card {
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  text-align: center;
  transition: all .2s;
}
.problem-card:hover { border-color: #fca5a5; background: #fff5f5; transform: translateY(-2px); }
.problem-card__icon { font-size: 2.5rem; margin-bottom: 12px; }
.problem-card p { font-size: 0.95rem; font-weight: 500; line-height: 1.6; }
.problems__arrow { text-align: center; }
.arrow-down {
  width: 2px;
  height: 48px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  margin: 0 auto 16px;
  position: relative;
}
.arrow-down::after {
  content: '';
  position: absolute;
  bottom: 0; left: 50%;
  transform: translateX(-50%);
  border-left: 8px solid transparent;
  border-right: 8px solid transparent;
  border-top: 12px solid var(--accent);
}
.problems__solution-label {
  font-size: 1.1rem;
  color: var(--gray);
}
.problems__solution-label strong { color: var(--primary); font-size: 1.3rem; }

/* ===== SOLUTION ===== */
.solution {
  background: linear-gradient(135deg, #1d4ed8 0%, #0891b2 70%, #06b6d4 100%);
  padding: 96px 0;
}
.solution__header { text-align: center; margin-bottom: 64px; }
.solution__flow {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.flow-step {
  background: rgba(255,255,255,.95);
  border: 1px solid rgba(255,255,255,.7);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  width: 200px;
  transition: all .2s;
  box-shadow: 0 8px 24px rgba(15,23,42,.10);
}
.flow-step:hover { background: white; transform: translateY(-4px); box-shadow: 0 16px 40px rgba(15,23,42,.18); }
.flow-step__num {
  font-size: 0.78rem;
  color: #1d4ed8;
  font-weight: 800;
  letter-spacing: .1em;
  margin-bottom: 12px;
}
.flow-step__icon { font-size: 2.5rem; margin-bottom: 12px; }
.flow-step h3 { color: #0f172a; font-size: 1rem; font-weight: 800; margin-bottom: 8px; }
.flow-step p { color: #475569; font-size: 0.82rem; line-height: 1.7; }
.flow-arrow { font-size: 1.5rem; color: rgba(255,255,255,.85); align-self: center; font-weight: 700; }

/* ===== FEATURES ===== */
.features { padding: 96px 0; background: var(--gray-light); }
.features__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.feature-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all .2s;
}
.feature-card:hover { box-shadow: var(--shadow); transform: translateY(-3px); border-color: #bfdbfe; }
.feature-card--large {
  grid-column: span 2;
  background: linear-gradient(135deg, #eff6ff 0%, #f5f3ff 100%);
  border-color: #bfdbfe;
}
.feature-card__tag {
  display: inline-block;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
  margin-bottom: 14px;
  letter-spacing: .03em;
}
.feature-card h3 {
  font-size: 1.2rem;
  font-weight: 900;
  line-height: 1.4;
  margin-bottom: 12px;
  color: var(--dark);
}
.feature-card p { color: var(--gray); font-size: 0.9rem; line-height: 1.8; }
.feature-list {
  list-style: none;
  margin-top: 16px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.feature-list li { font-size: 0.85rem; color: var(--dark-2); font-weight: 500; }

/* ===== NUMBERS ===== */
.numbers { padding: 96px 0; }
.numbers__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.number-card {
  text-align: center;
  padding: 40px 24px;
  border-radius: var(--radius);
  background: var(--primary-light);
  border: 1px solid #bfdbfe;
}
.number-card__num {
  display: block;
  font-size: 3rem;
  font-weight: 900;
  color: var(--primary);
  line-height: 1;
  margin-bottom: 12px;
}
.number-card__num .unit { font-size: 1.5rem; }
.number-card__label { display: block; font-size: 0.85rem; color: var(--gray); line-height: 1.5; font-weight: 500; }

/* ===== CASES ===== */
.cases { padding: 96px 0; background: var(--gray-light); }
.cases__grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.case-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  transition: all .2s;
}
.case-card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.case-card__header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
  gap: 16px;
}
.case-card__company { font-size: 0.85rem; font-weight: 700; color: var(--gray); }
.case-card__result {
  background: linear-gradient(90deg, var(--primary), var(--accent));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 1.1rem;
  font-weight: 900;
  white-space: nowrap;
}
.case-card__body { font-size: 0.9rem; color: var(--dark-2); line-height: 1.8; margin-bottom: 20px; }
.case-card__tags { display: flex; gap: 8px; }
.case-card__tags span {
  background: var(--gray-light);
  color: var(--gray);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 10px;
  border-radius: 6px;
}

/* ===== PRICING ===== */
.pricing { padding: 96px 0; }
.pricing__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: start; margin-bottom: 32px; }
.pricing__grid--3 { grid-template-columns: repeat(3, 1fr); }

/* 料金モデル */
.pricing__model {
  background: var(--gray-light);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 36px;
  margin-bottom: 48px;
  text-align: center;
}
.pricing__model-formula {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.formula-block {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px 28px;
  min-width: 140px;
}
.formula-block--result {
  background: var(--primary-light);
  border-color: #bfdbfe;
}
.formula-label { display: block; font-size: 0.75rem; color: var(--gray); font-weight: 600; text-transform: uppercase; letter-spacing: .05em; margin-bottom: 6px; }
.formula-value { display: block; font-size: 1.5rem; font-weight: 900; color: var(--dark); }
.formula-unit { font-size: 0.9rem; font-weight: 400; color: var(--gray); }
.formula-plus, .formula-equals { font-size: 1.8rem; font-weight: 900; color: var(--gray); }
.pricing__model-note { font-size: 0.88rem; color: var(--gray); }

/* per-article price in card */
.pricing-card__per-article {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--dark);
  margin-bottom: 8px;
}
.pricing-card__per-article strong { font-size: 1.6rem; color: var(--primary); }
.pricing-card__example {
  font-size: 0.82rem;
  color: var(--gray);
  background: var(--gray-light);
  border-radius: 6px;
  padding: 6px 12px;
  display: inline-block;
  margin-bottom: 24px;
}

/* single plan */
.pricing__single {
  display: flex;
  justify-content: center;
  margin-bottom: 32px;
}
.pricing-card--single {
  max-width: 560px;
  width: 100%;
  text-align: center;
  border-color: var(--primary);
  box-shadow: 0 8px 32px rgba(37,99,235,.12);
}
.pricing-card--single .pricing-card__price { font-size: 2.4rem; }
.pricing-card__features--grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 24px;
  text-align: left;
  margin-bottom: 28px;
}

/* two-plan layout */
.pricing__two {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 840px;
  margin: 0 auto 32px;
}
.pricing-card {
  background: var(--white);
  border: 2px solid var(--border);
  border-radius: 16px;
  padding: 36px 28px;
  position: relative;
  transition: all .2s;
}
.pricing-card--popular {
  border-color: var(--primary);
  box-shadow: 0 8px 32px rgba(37,99,235,.15);
  transform: scale(1.03);
}
.pricing-card__badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--primary);
  color: var(--white);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 4px 16px;
  border-radius: 100px;
  white-space: nowrap;
}
.pricing-card__badge--gray {
  background: var(--dark-2);
}
.pricing-card__name { font-size: 1rem; font-weight: 700; color: var(--gray); margin-bottom: 12px; }
.pricing-card__price {
  font-size: 2rem;
  font-weight: 900;
  color: var(--dark);
  margin-bottom: 8px;
  line-height: 1;
}
.pricing-card__price span { font-size: 0.9rem; color: var(--gray); font-weight: 400; }
.pricing-card__desc { font-size: 0.85rem; color: var(--gray); margin-bottom: 24px; }
.pricing-card__features {
  list-style: none;
  margin-bottom: 28px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.pricing-card__features li { font-size: 0.88rem; color: var(--dark-2); }
.pricing-card__features li:has(✗) { color: #cbd5e1; }
.pricing__note { text-align: center; font-size: 0.82rem; color: var(--gray); }

/* ===== HOW TO START ===== */
.howto { padding: 96px 0; background: var(--dark); }
.howto .section-title { color: var(--white); }
.howto__steps {
  display: flex;
  align-items: flex-start;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.howto-step {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  flex: 1;
  min-width: 180px;
  max-width: 220px;
}
.howto-step__num {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  font-weight: 900;
  color: var(--white);
  margin: 0 auto 16px;
}
.howto-step h3 { color: var(--white); font-size: 1rem; font-weight: 700; margin-bottom: 10px; }
.howto-step p { color: #94a3b8; font-size: 0.82rem; line-height: 1.7; }
.howto-step__arrow { font-size: 1.5rem; color: #475569; align-self: center; }

/* ===== FAQ ===== */
.faq { padding: 96px 0; background: var(--gray-light); }
.faq__list { max-width: 720px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}
.faq-item summary {
  padding: 20px 24px;
  font-weight: 700;
  cursor: pointer;
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.95rem;
  transition: background .15s;
}
.faq-item summary:hover { background: var(--primary-light); }
.faq-item summary::after { content: '＋'; color: var(--primary); font-size: 1.2rem; flex-shrink: 0; margin-left: 12px; }
.faq-item[open] summary::after { content: '－'; }
.faq-item p { padding: 0 24px 20px; font-size: 0.9rem; color: var(--gray); line-height: 1.9; }

/* ===== CTA SECTION ===== */
.cta-section { padding: 96px 0; background: linear-gradient(135deg, #1d4ed8, #06b6d4 70%, #22d3ee); }
.cta-box { max-width: 680px; margin: 0 auto; text-align: center; }
.cta-box h2 { font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 900; color: var(--white); margin-bottom: 12px; text-shadow: 0 2px 12px rgba(15,23,42,.18); }
.cta-box > p { color: rgba(255,255,255,.92); margin-bottom: 36px; font-size: 0.95rem; }
.cta-form { display: flex; flex-direction: column; gap: 12px; }
.cta-form__row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.cta-form input,
.cta-form select {
  padding: 14px 18px;
  border-radius: 10px;
  border: 1px solid rgba(255,255,255,.4);
  background: rgba(255,255,255,.95);
  color: #0f172a;
  font-size: 0.95rem;
  font-family: var(--font);
  outline: none;
  transition: all .2s;
  box-shadow: 0 4px 12px rgba(15,23,42,.08);
  width: 100%;
  box-sizing: border-box;
  appearance: none;
  -webkit-appearance: none;
}
.cta-form select {
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'><path fill='%2364748b' d='M6 8L0 0h12z'/></svg>");
  background-repeat: no-repeat;
  background-position: right 16px center;
  padding-right: 40px;
  cursor: pointer;
}
.cta-form input::placeholder { color: #94a3b8; }
.cta-form select:invalid { color: #94a3b8; }
.cta-form select option { color: #0f172a; }
.cta-form input:focus,
.cta-form select:focus { border-color: white; background-color: white; box-shadow: 0 0 0 3px rgba(255,255,255,.3); }
.cta-form__note { color: rgba(255,255,255,.85); font-size: 0.8rem; margin-top: 12px; }

/* ===== FOOTER ===== */
.footer { background: var(--dark); padding: 64px 0 0; }
.footer__inner {
  display: grid;
  grid-template-columns: 1.2fr 2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid #1e293b;
}
.footer__brand .logo { display: inline-block; margin-bottom: 16px; font-size: 1.3rem; }
.footer__brand p { color: #64748b; font-size: 0.85rem; line-height: 1.8; }
/* 3 列のリンクカラム */
.footer__links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}
.footer__col h4 { color: #94a3b8; font-size: 0.78rem; font-weight: 700; text-transform: uppercase; letter-spacing: .08em; margin-bottom: 16px; }
.footer__col a { display: block; color: #475569; font-size: 0.88rem; margin-bottom: 10px; transition: color .15s; text-decoration: none; }
.footer__col a:hover { color: var(--white); }
.footer__bottom { padding: 20px 0; text-align: center; }
.footer__bottom p { color: #334155; font-size: 0.8rem; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .why__grid { grid-template-columns: 1fr; }
  .why-arrow { transform: rotate(90deg); }
  .why__example-grid { grid-template-columns: 1fr; }
  .example-arrow { transform: rotate(90deg); }
  .header__nav { display: none; }
  .hero__inner { grid-template-columns: 1fr; gap: 40px; }
  .hero__visual { order: -1; }
  .problems__grid { grid-template-columns: repeat(2, 1fr); }
  .features__grid { grid-template-columns: 1fr; }
  .feature-card--large { grid-column: span 1; }
  .numbers__grid { grid-template-columns: repeat(2, 1fr); }
  .cases__grid { grid-template-columns: 1fr; }
  .pricing__grid, .pricing__grid--3, .pricing__two { grid-template-columns: 1fr; }
  .pricing-card__features--grid { grid-template-columns: 1fr; }
  .pricing-card--popular { transform: none; }
  .solution__flow { flex-direction: column; align-items: center; }
  .flow-arrow { transform: rotate(90deg); }
  .howto__steps { flex-direction: column; align-items: center; }
  .howto-step__arrow { transform: rotate(90deg); }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__links { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 600px) {
  .problems__grid { grid-template-columns: 1fr; }
  .numbers__grid { grid-template-columns: 1fr; }
  .cta-form__row { grid-template-columns: 1fr; }
  .footer__inner { grid-template-columns: 1fr; }
  .footer__links { grid-template-columns: 1fr; }
  .results-list { flex-direction: column; align-items: center; gap: 12px; }
  .hero__buttons { flex-direction: column; }
  .header__cta .btn--outline { display: none; }
}

/* ===== モバイル最適化（768px 以下） ===== */
@media (max-width: 768px) {
  body { font-size: 15px; }

  .container { padding: 0 18px; }

  /* セクション padding を圧縮 */
  .why, .features, .numbers, .cases, .pricing,
  .howto, .faq, .cta-section, .solution { padding: 64px 0; }
  .problems { padding: 56px 0 48px; }
  .hero { padding: 48px 0 40px; }

  /* セクションタイトル周り */
  .section-sub { margin-bottom: 32px; font-size: 0.95rem; line-height: 1.75; }

  /* ボタン: 折返し許可 + サイズ縮小 */
  .btn { white-space: normal; line-height: 1.4; padding: 11px 20px; font-size: 0.9rem; text-align: center; }
  .btn--lg { padding: 14px 22px; font-size: 0.98rem; }

  /* ヘッダー: 詰めて2行ロゴ崩れ防止 */
  .header__inner { gap: 12px; height: 60px; }
  .header__cta { gap: 8px; flex-shrink: 0; }
  .header__cta .btn { padding: 9px 14px; font-size: 0.82rem; }
  .logo { font-size: 1.15rem; }

  /* ヒーロー */
  .hero__inner { gap: 28px; padding-bottom: 8px; }
  .hero__title { font-size: clamp(1.7rem, 7vw, 2.4rem); margin-bottom: 18px; }
  .hero__sub { font-size: 0.95rem; line-height: 1.85; margin-bottom: 24px; }
  .hero__sub br { display: none; }
  .hero__badge { font-size: 0.74rem; padding: 6px 12px; margin-bottom: 18px; }
  .hero__buttons .btn { width: 100%; }
  .hero__note { font-size: 0.78rem; line-height: 1.7; }

  /* hero visual の laptop モックを引き締め */
  .hv { min-height: auto !important; }
  .hv-laptop__screen { grid-template-columns: 90px 1fr !important; height: 260px !important; }
  .hv-side { padding: 10px 8px !important; }
  .hv-side__brand { font-size: 0.7rem !important; margin-bottom: 10px !important; }
  .hv-side__nav li { font-size: 0.58rem !important; padding: 5px 6px !important; }
  .hv-main { padding: 10px 12px !important; }
  .hv-main__title { font-size: 0.78rem !important; }

  /* WHY セクション例示 */
  .why-card { padding: 24px 20px; }
  .why__example { padding: 24px 18px; }

  /* PROBLEMS */
  .problem-card { padding: 24px 18px; }

  /* SOLUTION 5 ステップ: 1 列に */
  .solution__flow { grid-template-columns: 1fr !important; gap: 12px; }
  .flow-step { width: 100% !important; padding: 24px 20px; }
  .flow-step__icon { font-size: 2.2rem; }

  /* FEATURES */
  .feature-card { padding: 24px 22px; }
  .feature-card h3 { font-size: 1.08rem; }

  /* NUMBERS */
  .number-card { padding: 28px 16px; }
  .number-card__num { font-size: 2.4rem; }
  .number-card__num .unit { font-size: 1.1rem; }

  /* CASES */
  .case-card { padding: 24px 20px; }
  .case-card__header { gap: 10px; flex-wrap: wrap; }

  /* PRICING: formula を縦積み */
  .pricing__model { padding: 24px 18px; margin-bottom: 36px; }
  .pricing__model-formula { gap: 10px; flex-direction: column; }
  .formula-plus, .formula-equals { transform: rotate(90deg); font-size: 1.4rem; }
  .formula-block { min-width: 0; width: 100%; padding: 12px 18px; }
  .formula-value { font-size: 1.3rem; }

  .pricing-card { padding: 28px 22px; }
  .pricing-card--popular { transform: none; }
  .pricing-card__price { font-size: 1.7rem; }
  .pricing-card--single .pricing-card__price { font-size: 2rem; }
  .pricing-card__per-article strong { font-size: 1.35rem; }
  .pricing__note { font-size: 0.78rem; line-height: 1.7; }

  /* HOWTO */
  .howto-step { min-width: 0; max-width: 100%; width: 100%; padding: 24px 20px; }

  /* FAQ */
  .faq-item summary { padding: 16px 18px; font-size: 0.92rem; }
  .faq-item p { padding: 0 18px 18px; font-size: 0.88rem; line-height: 1.85; }

  /* CTA SECTION */
  .cta-box h2 { font-size: clamp(1.3rem, 5vw, 1.7rem); }
  .cta-box > p { font-size: 0.88rem; margin-bottom: 24px; }
  .cta-form input,
  .cta-form select { padding: 12px 16px; font-size: 0.95rem; }
  .cta-form select { padding-right: 36px; }

  /* hero-strip */
  .hero-strip { font-size: 0.82rem; padding: 12px 18px; border-radius: 16px; line-height: 1.7; }

  /* FOOTER */
  .footer { padding: 48px 0 0; }
  .footer__inner { padding-bottom: 32px; gap: 28px; }
  .footer__links { grid-template-columns: repeat(3, 1fr); gap: 18px; }
  .footer__col h4 { margin-bottom: 12px; font-size: 0.74rem; }
  .footer__col a { font-size: 0.82rem; margin-bottom: 8px; }

  /* フローティング CTA を少し小さく */
  .floating-cta {
    font-size: 0.82rem !important;
    padding: 10px 18px !important;
    bottom: 12px !important;
  }
  .floating-cta__icon { font-size: 0.95rem !important; }

  /* CTA セクションが画面内のときフローティングを退ける */
  body { scroll-padding-bottom: 60px; }

  /* brand-story */
  .brand-story { padding: 56px 0 !important; }
  .brand-story__logo { width: 100px !important; height: 100px !important; }
  .brand-story__title { font-size: 1.35rem !important; }
  .brand-story__lead { font-size: 0.95rem !important; line-height: 1.85 !important; }
  .brand-letter { padding: 16px 18px !important; }
  .brand-letter__head { font-size: 1.4rem !important; }
}

/* ===== 極小モバイル（480px 以下） ===== */
@media (max-width: 480px) {
  .hero__title { font-size: clamp(1.55rem, 8vw, 2rem); }
  .hero__title br { display: none; }

  .header__cta .btn--outline { display: none; }
  .header__cta .btn--primary { font-size: 0.78rem; padding: 8px 12px; }
  .logo { font-size: 1.05rem; }

  .section-title { font-size: clamp(1.5rem, 6vw, 1.9rem); }

  /* hero visual: 横並びの sidebar を一旦消して main だけに */
  .hv-laptop__screen { grid-template-columns: 1fr !important; height: 220px !important; }
  .hv-side { display: none !important; }

  /* 数値カードがゴチャつくのでもう1段詰める */
  .number-card { padding: 22px 12px; }
  .number-card__num { font-size: 2rem; }

  /* footer リンクは 1 列 */
  .footer__links { grid-template-columns: 1fr; gap: 20px; }

  /* solution flow ステップの矢印は不要 */
  .howto-step__arrow { display: none; }
}

/* ===== 日程調整モーダル ===== */
.schedule-modal {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: none;
}
.schedule-modal.is-open { display: block; }
.schedule-modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, .65);
  backdrop-filter: blur(2px);
}
.schedule-modal__panel {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(480px, calc(100vw - 32px));
  background: white;
  border-radius: 16px;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .3);
  overflow: hidden;
  animation: scheduleModalIn .25s ease-out;
}
@keyframes scheduleModalIn {
  from { opacity: 0; transform: translate(-50%, -48%) scale(.96); }
  to   { opacity: 1; transform: translate(-50%, -50%) scale(1); }
}
.schedule-modal__close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  border: 0;
  background: #f1f5f9;
  color: #475569;
  font-size: 22px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .15s;
  z-index: 1;
}
.schedule-modal__close:hover { background: #e2e8f0; }
.schedule-modal__body {
  padding: 44px 32px 32px;
  text-align: center;
}
.schedule-modal__icon {
  font-size: 48px;
  line-height: 1;
  margin-bottom: 12px;
}
.schedule-modal__body h3 {
  margin: 0 0 12px;
  font-size: 1.35rem;
  color: #0f172a;
}
.schedule-modal__lead {
  margin: 0 0 24px;
  font-size: 0.95rem;
  color: #475569;
  line-height: 1.7;
}
.schedule-modal__cta {
  display: inline-block;
  text-decoration: none;
}
.schedule-modal__note {
  margin: 16px 0 0;
  font-size: 0.82rem;
  color: #94a3b8;
}
body.modal-open { overflow: hidden; }

@media (max-width: 600px) {
  .schedule-modal__panel {
    width: calc(100vw - 24px);
  }
  .schedule-modal__body { padding: 36px 20px 24px; }
}