/* ===== リセット・ベース ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --color-primary:      #4F46E5;
  --color-primary-dark: #3730A3;
  --color-accent:       #F59E0B;
  --color-accent-dark:  #D97706;
  --color-dark:         #1E1B4B;
  --color-gray:         #F8F9FF;
  --color-border:       #E0E0F0;
  --color-text:         #1F2937;
  --color-muted:        #6B7280;
  --radius:             12px;
  --shadow:             0 4px 24px rgba(79,70,229,.07);
  --shadow-lg:          0 8px 40px rgba(79,70,229,.14);
}

body { font-family: 'Noto Sans JP', sans-serif; color: var(--color-text); line-height: 1.7; font-size: 16px; }
a { color: inherit; text-decoration: none; }

.container { max-width: 1000px; margin: 0 auto; padding: 0 24px; }
.section { padding: 80px 0; }
.section--gray { background: var(--color-gray); }

.section__title {
  font-size: clamp(1.5rem, 4vw, 2rem);
  font-weight: 900;
  text-align: center;
  margin-bottom: 12px;
  color: var(--color-dark);
}
.section__sub { text-align: center; color: var(--color-muted); margin-bottom: 48px; }

/* ===== ボタン ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border-radius: 8px; font-weight: 700; cursor: pointer; transition: all .2s;
  border: 2px solid transparent; white-space: nowrap; font-family: inherit;
}
.btn--sm  { padding: 8px 20px; font-size: .875rem; }
.btn--md  { padding: 12px 28px; font-size: 1rem; }
.btn--lg  { padding: 16px 40px; font-size: 1.1rem; }
.btn--full { width: 100%; }

.btn--primary { background: var(--color-primary); color: #fff; }
.btn--primary:hover { background: var(--color-primary-dark); transform: translateY(-1px); }

.btn--accent { background: var(--color-accent); color: #fff; box-shadow: 0 4px 18px rgba(245,158,11,.3); }
.btn--accent:hover { background: var(--color-accent-dark); transform: translateY(-1px); }

.btn--outline { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn--outline:hover { background: var(--color-primary); color: #fff; }

.btn--ghost { border-color: rgba(255,255,255,.5); color: #fff; background: transparent; }
.btn--ghost:hover { background: rgba(255,255,255,.15); }

/* ===== ヘッダー ===== */
.header {
  position: sticky; top: 0;
  background: rgba(255,255,255,.95); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border); z-index: 100; padding: 12px 0;
}
.header__inner { display: flex; align-items: center; justify-content: space-between; gap: 16px; }

.logo-series {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 900; color: var(--color-dark); font-size: 1rem;
}
.logo-series .badge {
  background: var(--color-primary); color: #fff;
  font-size: .7rem; padding: 2px 8px; border-radius: 4px; font-weight: 700;
}
.header__breadcrumb {
  font-size: .82rem; color: var(--color-muted);
  display: flex; align-items: center; gap: 6px;
}
.header__breadcrumb a { color: var(--color-primary); }
.header__breadcrumb a:hover { text-decoration: underline; }
.header__right { display: flex; align-items: center; gap: 12px; }
.header__by { font-size: .78rem; color: var(--color-muted); }

/* ===== ヒーロー（シリーズTOP） ===== */
.hero--series {
  background: linear-gradient(135deg, #1E1B4B 0%, #312E81 55%, #4338CA 100%);
  color: #fff; padding: 100px 0 80px; text-align: center; position: relative; overflow: hidden;
}
.hero--series::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at 70% 20%, rgba(167,139,250,.25) 0%, transparent 55%);
  pointer-events: none;
}
.hero--series .hero__inner { position: relative; }

.hero__eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.2);
  padding: 6px 18px; border-radius: 20px; font-size: .875rem;
  margin-bottom: 24px; letter-spacing: .08em;
}
.hero__series-title {
  font-size: clamp(2.2rem, 7vw, 4rem);
  font-weight: 900; line-height: 1.15; margin-bottom: 20px;
}
.hero__series-title .yoshinani {
  display: inline-block;
  background: linear-gradient(90deg, #A78BFA, #818CF8, #60A5FA);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.hero__sub { font-size: 1.15rem; color: rgba(255,255,255,.82); margin-bottom: 10px; }
.hero__desc { font-size: .95rem; color: rgba(255,255,255,.58); margin-bottom: 44px; }
.hero__cta { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 36px; }
.hero__trust {
  display: flex; gap: 20px; justify-content: center; flex-wrap: wrap;
  font-size: .82rem; color: rgba(255,255,255,.6);
}
.hero__trust span { display: flex; align-items: center; gap: 4px; }
.hero__trust span::before { content: '✓'; color: #A78BFA; font-weight: 700; }

/* ===== ヒーロー（個別プラグイン） ===== */
.hero--plugin {
  background: linear-gradient(135deg, #1E1B4B 0%, #111827 100%);
  color: #fff; padding: 72px 0 64px;
}
.hero--plugin .hero__inner {
  display: grid; grid-template-columns: 1fr 380px; gap: 48px; align-items: center;
}
.plugin-tag {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.18);
  padding: 4px 14px; border-radius: 20px; font-size: .8rem;
  margin-bottom: 14px; letter-spacing: .05em;
}
.plugin-tag a { color: #A78BFA; }
.plugin-tag a:hover { text-decoration: underline; }
.plugin-title { font-size: clamp(1.8rem, 4.5vw, 2.8rem); font-weight: 900; line-height: 1.2; margin-bottom: 14px; }
.plugin-title .series { display: block; font-size: .5em; font-weight: 700; color: #A78BFA; margin-bottom: 4px; }
.plugin-tagline { font-size: 1rem; color: rgba(255,255,255,.72); margin-bottom: 28px; line-height: 1.65; }

.price-box {
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.15);
  border-radius: var(--radius); padding: 28px 24px; text-align: center;
}
.price-box__label { font-size: .78rem; color: rgba(255,255,255,.55); margin-bottom: 6px; }
.price-box__num { font-size: 2.8rem; font-weight: 900; line-height: 1; }
.price-box__unit { font-size: .9rem; color: rgba(255,255,255,.6); margin-left: 4px; }
.price-box__taxin { font-size: .78rem; color: rgba(255,255,255,.45); margin: 6px 0 20px; }
.price-box__note { font-size: .75rem; color: rgba(255,255,255,.4); margin-top: 10px; }

/* ===== 課題提起 ===== */
.pain__grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 20px; margin-bottom: 32px;
}
.pain__card {
  background: #fff; border: 2px solid #FEE2E2; border-radius: var(--radius);
  padding: 28px 20px; text-align: center;
}
.pain__icon { font-size: 1.8rem; margin-bottom: 10px; }
.pain__card p { font-size: .88rem; color: #7F1D1D; line-height: 1.6; }
.pain__arrow { text-align: center; font-size: 1rem; font-weight: 700; color: var(--color-primary); padding-top: 8px; }

/* ===== 機能 ===== */
.features__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 22px; }
.feature__card {
  background: #fff; border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 28px 24px; box-shadow: var(--shadow);
}
.feature__icon { font-size: 2rem; margin-bottom: 10px; }
.feature__title { font-weight: 700; font-size: 1rem; margin-bottom: 8px; color: var(--color-dark); }
.feature__desc { color: var(--color-muted); font-size: .88rem; line-height: 1.65; }
.feature__tag {
  display: inline-block; background: #EEF2FF; color: var(--color-primary);
  font-size: .7rem; font-weight: 700; padding: 2px 8px; border-radius: 4px; margin-top: 8px;
}

/* ===== 対応方式バッジ ===== */
.method-badges { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; margin-bottom: 48px; }
.method-badge {
  background: #fff; border: 2px solid var(--color-primary); color: var(--color-primary);
  font-size: .8rem; font-weight: 700; padding: 5px 14px; border-radius: 20px;
}

/* ===== プラグインカード（TOPページ） ===== */
.plugins__grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(290px, 1fr)); gap: 24px; }
.plugin-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow); display: flex; flex-direction: column;
  transition: box-shadow .2s, transform .2s;
}
.plugin-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.plugin-card__icon { font-size: 2.2rem; margin-bottom: 10px; }
.plugin-card__name { font-size: 1.05rem; font-weight: 900; color: var(--color-dark); margin-bottom: 8px; }
.plugin-card__desc { font-size: .88rem; color: var(--color-muted); flex: 1; margin-bottom: 18px; line-height: 1.65; }
.plugin-card__price { font-size: 1.3rem; font-weight: 900; color: var(--color-dark); }
.plugin-card__price span { font-size: .75rem; font-weight: 400; color: var(--color-muted); }
.plugin-card__actions { margin-top: 14px; display: flex; gap: 8px; }

/* ===== ステップ ===== */
.steps__flow { display: flex; align-items: flex-start; justify-content: center; gap: 8px; flex-wrap: wrap; }
.step {
  background: #fff; border-radius: var(--radius); padding: 26px 20px; text-align: center;
  flex: 1; min-width: 180px; max-width: 240px; box-shadow: var(--shadow);
}
.step__num {
  width: 42px; height: 42px; background: var(--color-primary); color: #fff;
  border-radius: 50%; font-weight: 900; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center; margin: 0 auto 12px;
}
.step__title { font-weight: 700; margin-bottom: 6px; font-size: .92rem; }
.step__desc { font-size: .82rem; color: var(--color-muted); }
.step__arrow { font-size: 1.8rem; color: var(--color-primary); align-self: center; }

/* ===== 料金 ===== */
.pricing__wrap { max-width: 500px; margin: 0 auto; }
.pricing__card {
  background: #fff; border: 2px solid var(--color-primary);
  border-radius: var(--radius); padding: 40px 36px; text-align: center;
  box-shadow: var(--shadow-lg); margin-bottom: 20px;
}
.pricing__badge {
  display: inline-block; background: var(--color-primary); color: #fff;
  font-size: .78rem; font-weight: 700; padding: 4px 18px;
  border-radius: 20px; margin-bottom: 16px; letter-spacing: .08em;
}
.price__num { font-size: 3.2rem; font-weight: 900; color: var(--color-dark); }
.price__unit { font-size: 1rem; color: var(--color-muted); }
.price__taxin { font-size: .82rem; color: var(--color-muted); margin: 6px 0 24px; }
.pricing__list {
  list-style: none; text-align: left; display: flex; flex-direction: column; gap: 12px;
  margin-bottom: 32px;
}
.pricing__list li { display: flex; align-items: flex-start; gap: 8px; font-size: .92rem; }
.pricing__list li::before { content: '✓'; color: var(--color-primary); font-weight: 700; flex-shrink: 0; }
.pricing__note { font-size: .8rem; color: var(--color-muted); margin-top: 10px; }
.pricing__cancel {
  background: var(--color-gray); border-radius: 8px; padding: 14px 20px;
  font-size: .85rem; color: var(--color-muted); text-align: center;
}

/* ===== FAQ ===== */
.faq__list { max-width: 720px; margin: 0 auto; }
.faq__item { border-bottom: 1px solid var(--color-border); }
.faq__q {
  padding: 18px 16px; font-weight: 700; cursor: pointer; list-style: none;
  display: flex; justify-content: space-between; align-items: center; font-size: .95rem;
}
.faq__q::-webkit-details-marker { display: none; }
.faq__q::after { content: '+'; font-size: 1.4rem; color: var(--color-primary); flex-shrink: 0; }
details[open] .faq__q::after { content: '−'; }
.faq__a { padding: 0 16px 18px; color: var(--color-muted); font-size: .9rem; line-height: 1.7; }

/* ===== CTA ===== */
.cta { background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%); color: #fff; }
.cta__inner { text-align: center; }
.cta__title { font-size: clamp(1.4rem, 4vw, 1.8rem); font-weight: 900; margin-bottom: 10px; }
.cta__sub { opacity: .82; margin-bottom: 6px; }
.cta__desc { font-size: .875rem; opacity: .6; margin-bottom: 32px; }

/* ===== パック予告 ===== */
.pack-teaser {
  background: linear-gradient(135deg, #1E1B4B, #312E81);
  color: #fff; border-radius: var(--radius); padding: 44px 36px;
  text-align: center; position: relative; overflow: hidden;
}
.pack-teaser__ribbon {
  position: absolute; top: 20px; right: -28px;
  background: var(--color-accent); color: #fff;
  font-size: .72rem; font-weight: 700; padding: 5px 50px;
  transform: rotate(35deg);
}
.pack-teaser__title { font-size: 1.4rem; font-weight: 900; margin-bottom: 10px; }
.pack-teaser__desc { opacity: .72; margin-bottom: 20px; font-size: .95rem; }
.pack-teaser__tags { display: flex; gap: 8px; justify-content: center; flex-wrap: wrap; margin-bottom: 24px; }
.pack-teaser__tag { background: rgba(255,255,255,.12); border-radius: 20px; padding: 4px 14px; font-size: .82rem; }

/* ===== フッター ===== */
.footer { background: var(--color-dark); color: rgba(255,255,255,.6); padding: 48px 0 24px; font-size: .875rem; }
.footer__inner { display: grid; grid-template-columns: 1fr auto; gap: 32px; margin-bottom: 32px; }
.footer__brand { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.footer__tagline { font-size: .8rem; opacity: .5; margin-bottom: 8px; }
.footer__mail { font-size: .82rem; }
.footer__mail a { color: rgba(255,255,255,.45); }
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a:hover { color: #fff; }
.footer__copy { text-align: center; border-top: 1px solid rgba(255,255,255,.1); padding-top: 20px; font-size: .78rem; opacity: .4; }

/* ===== レスポンシブ ===== */
@media (max-width: 700px) {
  .section { padding: 56px 0; }
  .hero--series { padding: 64px 0 56px; }
  .hero--plugin { padding: 56px 0 48px; }
  .hero--plugin .hero__inner { grid-template-columns: 1fr; gap: 28px; }
  .steps__flow { flex-direction: column; align-items: center; }
  .step__arrow { transform: rotate(90deg); }
  .footer__inner { grid-template-columns: 1fr; }
  .plugins__grid { grid-template-columns: 1fr; }
  .plugin-card__actions { flex-direction: column; }
  .pricing__card { padding: 28px 20px; }
}

/* ===== カテゴリ見出し（17本構成用） ===== */
.category__title {
  font-size: 1.25rem; font-weight: 900; margin: 48px 0 20px;
  padding-left: 12px; border-left: 5px solid var(--color-accent, #F59E0B);
}
.plugins__grid + .category__title { margin-top: 56px; }