/* =========================
   基本設定
========================= */
:root {
  --main: #2f80ed;
  --accent: #f2994a;
  --dark: #222;
  --gray: #666;
  --light: #f7f9fc;
  --border: #e5e7eb;
  --radius: 12px;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
               "Noto Sans JP", "Yu Gothic", sans-serif;
  color: var(--dark);
  line-height: 1.7;
  background: #fff;
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

/* =========================
   レイアウト共通
========================= */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section--light {
  background: var(--light);
}

.section__title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 40px;
}

.section__lead {
  text-align: center;
  color: var(--gray);
  margin-bottom: 40px;
}

/* =========================
   ボタン
========================= */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: 999px;
  font-weight: 700;
  transition: 0.2s;
  border: 2px solid transparent;
}

.btn--primary {
  background: var(--main);
  color: #fff;
}

.btn--primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
}

.btn--ghost {
  border-color: var(--main);
  color: var(--main);
}

.btn--ghost:hover {
  background: var(--main);
  color: #fff;
}

.btn--block {
  width: 100%;
}

.btn--large {
  font-size: 1.1rem;
  padding: 18px 36px;
}

/* =========================
   HERO（ファーストビュー）
========================= */
.hero {
  background: linear-gradient(180deg, #f2f6ff 0%, #ffffff 100%);
  padding: 80px 0 40px;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 40px;
  align-items: center;
}

.hero__badge {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 0.85rem;
  margin-bottom: 16px;
}

.hero__title {
  font-size: clamp(1.8rem, 4vw, 2.6rem);
  font-weight: 800;
  margin-bottom: 20px;
}

.hero__lead {
  font-size: 1.05rem;
  color: var(--gray);
  margin-bottom: 24px;
}

.hero__points {
  margin-bottom: 32px;
}

.hero__points li {
  margin-bottom: 8px;
  font-weight: 600;
}

.hero__cta {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

.hero__note {
  margin-top: 16px;
  font-size: 0.8rem;
  color: #999;
}

.hero__visual img {
  border-radius: var(--radius);
  box-shadow: 0 20px 40px rgba(0,0,0,0.1);
}

/* =========================
   GRID / CARD
========================= */
.grid {
  display: grid;
  gap: 24px;
}

.grid--3 {
  grid-template-columns: repeat(3, 1fr);
}

.card,
.feature,
.review {
  background: #fff;
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.card__title,
.feature__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

/* =========================
   SPLIT（左右分割）
========================= */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.split__media img {
  border-radius: var(--radius);
}

/* =========================
   成分表
========================= */
.spec__row {
  display: flex;
  justify-content: space-between;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
}

/* =========================
   比較表
========================= */
.compare {
  width: 100%;
  border-collapse: collapse;
}

.compare th,
.compare td {
  border: 1px solid var(--border);
  padding: 16px;
  text-align: center;
}

.compare thead {
  background: var(--light);
}

/* =========================
   OFFER（価格）
========================= */
.offer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  align-items: center;
}

.offer__normal {
  color: var(--gray);
  text-decoration: line-through;
}

.offer__special {
  font-size: 2rem;
  font-weight: 800;
  color: var(--accent);
  margin: 16px 0;
}

.offer__perks li {
  margin-bottom: 8px;
  font-weight: 600;
}

/* =========================
   フォーム
========================= */
.field {
  display: block;
  margin-bottom: 16px;
}

.field__label {
  font-size: 0.85rem;
  color: var(--gray);
}

.field__input {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid var(--border);
}

/* =========================
   FAQ
========================= */
.faq__item {
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

.faq__q {
  font-weight: 700;
  cursor: pointer;
}

/* =========================
   FINAL CTA
========================= */
.section--final {
  background: var(--main);
  color: #fff;
  text-align: center;
}

.final-cta__title {
  font-size: 2rem;
  margin-bottom: 16px;
}

/* =========================
   FOOTER
========================= */
.footer {
  background: #111;
  color: #ccc;
  padding: 40px 0;
}

.footer__nav a {
  margin-right: 16px;
  font-size: 0.9rem;
}

.footer__copy {
  display: block;
  margin-top: 24px;
  font-size: 0.75rem;
  color: #777;
}

/* =========================
   固定CTA（任意）
========================= */
.sticky-cta {
  position: fixed;
  bottom: 16px;
  right: 16px;
  z-index: 100;
}

/* =========================
   レスポンシブ
========================= */
@media (max-width: 768px) {
  .hero__inner,
  .split,
  .offer {
    grid-template-columns: 1fr;
  }

  .grid--3 {
    grid-template-columns: 1fr;
  }

  .section {
    padding: 60px 0;
  }
}