html {
  font-size: calc(10 * 100vw / 390);
  scroll-behavior: smooth;
}

@media (min-width:768px) {
  html {
    font-size: calc(10 * 100vw / 1480);
  }
}

@media (min-width:1480px) {
  html {
    font-size: 62.5%;
  }
}

:root {
  --bg: #ffffff;
  --bg-soft: #f7f9fc;
  --text: #0f1320;
  --text-soft: #616b86;
  --border: #e5e9f2;
  --shadow: 0 1rem 2rem rgba(17, 33, 68, .08);
  --radius: 1.8rem;
  --brand: #1f3b6e;
  --brand-soft: #e6edf8;
}

body {
  color: var(--text);
  background: var(--bg);
  font-family: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Hiragino Kaku Gothic ProN", Meiryo, sans-serif;
  line-height: 1.8;
  font-size: 1.6rem;
}

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

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

/* =========================
   レイアウトユーティリティ
   ========================= */
.u-container {
  width: min(112rem, 92%);
  margin: 0 auto;
}

/* grid: モバイル=1列 基準 */
.u-grid {
  display: grid;
  gap: 2rem;
}

.u-grid--2,
.u-grid--3,
.u-grid--4 {
  grid-template-columns: 1fr;
}

/* >=780px: タブレット */
@media (min-width:780px) {
  .u-grid--2 {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .u-grid--4 {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* >=1000px: デスクトップ広め */
@media (min-width:1000px) {
  .u-grid--4 {
    grid-template-columns: repeat(4, 1fr);
  }
}

/* =========================
   ヘッダー
   ========================= */
.header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .86);
  backdrop-filter: blur(1rem);
  border-bottom: .1rem solid var(--border);
  transition: box-shadow .25s ease, background .25s ease;
}

.header--scrolled {
  box-shadow: var(--shadow);
  background: #fff;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.2rem 0;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  font-weight: 800;
  letter-spacing: .06em;
  font-size: 1.8rem;
  color: var(--brand);
}

/* モバイル基準：ナビ非表示、バーガー表示 */
.header__nav {
  display: none;
  gap: 2.4rem;
}

.header__nav-link {
  padding: .8rem .4rem;
  border-bottom: .2rem solid transparent;
  color: #223;
}

.header__nav-link:hover {
  border-bottom-color: var(--brand);
  color: var(--brand);
}

.header__burger {
  display: flex;
  width: 4rem;
  height: 4rem;
  border: .1rem solid var(--border);
  border-radius: 1.2rem;
  align-items: center;
  justify-content: center;
}

.header__burger-line {
  width: 1.8rem;
  height: .2rem;
  background: #334;
  position: relative;
  display: block;
}

.header__burger-line::before,
.header__burger-line::after {
  content: "";
  position: absolute;
  left: 0;
  width: 1.8rem;
  height: .2rem;
  background: #334;
}

.header__burger-line::before {
  top: -.6rem;
}

.header__burger-line::after {
  top: .6rem;
}

.header__mobile {
  display: none;
  padding: 1rem 0 1.6rem;
}

.header__mobile-link {
  display: block;
  padding: 1.2rem .6rem;
  border-bottom: .1rem solid var(--border);
}

.header__mobile--show {
  display: block;
}

/* >=860px: PCでナビ表示・バーガー/モバイルメニュー非表示 */
@media (min-width:860px) {
  .header__nav {
    display: flex;
  }

  .header__burger {
    display: none;
  }

  .header__mobile {
    display: none !important;
  }
}

/* =========================
   ヒーロー
   ========================= */
.hero {
  position: relative;
  border-radius: clamp(2rem, 2vw, 3rem);
  overflow: hidden;
  background: var(--bg-soft);
  margin: 2.2rem 0 3.6rem;
}

.hero__img {
  width: 100%;
  height: auto;
  min-height: 36rem;
  max-height: 70rem;
  object-fit: cover;
  object-position: center;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(255, 255, 255, .0) 0%, rgba(255, 255, 255, .5) 75%, rgba(255, 255, 255, .95) 100%);
}

/* =========================
   セクション
   ========================= */
.section {
  padding: 4.2rem 0;
}

.section__head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 1.2rem;
  margin-bottom: 1.8rem;
  border-bottom: 2px solid var(--brand-soft);
  padding-bottom: .8rem;
}

.section__title {
  font-size: 2.3rem;
  font-weight: 800;
  letter-spacing: .04em;
  color: #1a2542;
}

.section__desc {
  color: var(--text-soft);
  font-size: 1.3rem;
}

/* =========================
   カード
   ========================= */
.card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 1.6rem;
  box-shadow: var(--shadow);
  padding: 1.8rem;
  transition: transform .2s ease, box-shadow .2s ease;
}

.card:hover {
  transform: translateY(-.2rem);
  box-shadow: 0 .8rem 2rem rgba(17, 33, 68, .12);
  opacity: 0.7;
}

/* カード全体クリック */
.card-link {
  display: block;
  color: inherit;
  text-decoration: none;
}

.card-link:hover .card {
  transform: translateY(-.4rem);
  box-shadow: 0 1.2rem 2.4rem rgba(17, 33, 68, .15);
}

/* 画像カード微調整 */
.card--maker img,
.card--shop img {
  border-radius: 1rem;
  margin-bottom: 1rem;
}

.card--news time {
  display: block;
  color: #61709b;
  font-size: 1.4rem;
  margin-bottom: .4rem;
}

/* 高さを揃える（モバイル基準） */
.u-grid.u-grid--3 {
  align-items: stretch;
}

.card-link,
.card {
  display: flex;
  flex-direction: column;
  height: 100%;
}

.card img {
  width: 100%;
  height: auto;
  object-fit: cover;
  border-radius: 1rem;
}

.card h3 {
  flex-grow: 1;
}

.card p {
  margin-top: auto;
}

/* =========================
   CTA / テーブル / リスト / フォーム
   ========================= */
.cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.6rem;
  padding: 2.2rem;
  border-radius: 1.6rem;
  background: var(--brand-soft);
  border: 1px solid var(--border);
}

.cta__text {
  margin: 0;
  color: #27406f;
}

.cta__btn {
  padding: 1.2rem 1.8rem;
  border-radius: 1.2rem;
  border: 1px solid var(--brand);
  background: #fff;
  color: var(--brand);
  font-weight: 800;
}

.cta__btn:hover {
  background: var(--brand);
  color: #fff;
}

.table {
  width: 100%;
  border-collapse: collapse;
}

.table th,
.table td {
  border: 1px solid var(--border);
  padding: 1.2rem;
  text-align: left;
}

.table th {
  background: #fbfcfe;
}

.list {
  padding-left: 1.6rem;
}

.form {
  display: grid;
  gap: 1.2rem;
  max-width: 74rem;
}

.information-text {
  margin-bottom: 4rem;
}

.privacy__header {
  margin-top: 5rem;
}

.cta__privacy {
  width: 22rem;
  display: block;
  margin-top: 1rem;
  margin-bottom: 1rem;
}

/* =========================
   フッター
   ========================= */
.footer {
  margin-top: 4.6rem;
  padding: 2.4rem 0 3.6rem;
  border-top: 1px solid var(--border);
  color: #5a647b;
  font-size: 1.3rem;
}

.footer a {
  text-decoration: underline;
  text-underline-offset: .3rem;
}

/* =========================
   販売サイト：ボタン型カード（画像なし）
   ========================= */
.card--shopbtn {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 120px;
  border-radius: 12px;
  font-size: 1.6rem;
  font-weight: 600;
  color: #fff;
  text-align: center;
  transition: all .25s ease;
  box-shadow: 0 .4rem 1rem rgba(0, 0, 0, .08);
}

/* >=768px: 少し大きく */
@media (min-width:768px) {
  .card--shopbtn {
    height: 16rem;
    font-size: 1.8rem;
  }
}

/* 各ブランドカラー（ロゴ不使用・色のみ） */
.card--amazon {
  background-color: #232f3e;
}

.card--amazon:hover {
  background-color: #ff9900;
  color: #232f3e;
}

.card--rakuten {
  background-color: #bf0000;
}

.card--rakuten:hover {
  background-color: #fff;
  color: #bf0000;
  border: 2px solid #bf0000;
}

.card--yahoo {
  background-color: #ff0033;
}

.card--yahoo:hover {
  background-color: #fff;
  color: #ff0033;
  border: 2px solid #ff0033;
}

/* 任意：ボタン群（テキストボタン方式を使う場合） */
.shop-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1.6rem;
  margin-top: 2.4rem;
}

.btn-shop {
  display: inline-block;
  min-width: 200px;
  padding: 1rem 2rem;
  border-radius: 6px;
  text-align: center;
  font-weight: 600;
  text-decoration: none;
  color: #fff;
  transition: all .2s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, .08);
}

.btn-shop--amazon {
  background: #232f3e;
}

.btn-shop--amazon:hover {
  background: #ff9900;
  color: #232f3e;
}

.btn-shop--rakuten {
  background: #bf0000;
}

.btn-shop--rakuten:hover {
  background: #fff;
  color: #bf0000;
  border: 1px solid #bf0000;
}

.btn-shop--yahoo {
  background: #ff0033;
}

.btn-shop--yahoo:hover {
  background: #fff;
  color: #ff0033;
  border: 1px solid #ff0033;
}


@media (min-width:768px) {
  .card--shopbtn--padding {
    padding-top: 3rem;
  }
}

/* ---- ショップリンクボタン（モール別） ---- */
.cta--shops {
  flex-direction: column;
  align-items: flex-start;
  gap: 1.6rem;
  background: var(--brand-soft);
  border: 1px solid var(--border);
  padding: 2.4rem;
  border-radius: 1.6rem;
  box-shadow: var(--shadow);
}

.shop-buttons {
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  gap: 1.2rem;
  width: 100%;
}

.btn-shop {
  flex: 1 1 30%;
  min-width: 200px;
  padding: 1.2rem 2rem;
  border-radius: 8px;
  text-align: center;
  font-weight: 700;
  color: #fff;
  transition: all 0.25s ease;
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.08);
}

/* 各ブランドカラー */
.btn-shop--amazon {
  background: #232f3e;
}

.btn-shop--amazon:hover {
  background: #ff9900;
  color: #232f3e;
}

.btn-shop--rakuten {
  background: #bf0000;
}

.btn-shop--rakuten:hover {
  background: #fff;
  color: #bf0000;
  border: 2px solid #bf0000;
}

.btn-shop--yahoo {
  background: #ff0033;
}

.btn-shop--yahoo:hover {
  background: #fff;
  color: #ff0033;
  border: 2px solid #ff0033;
}

/* 追加：メルカリ／Shopify 用カラー */
.card--mercari {
  background-color: #FF4B4B;
  /* メルカリ系の赤 */
}

.card--mercari:hover {
  background-color: #fff;
  color: #FF4B4B;
  border: 2px solid #FF4B4B;
}

.card--shopify {
  background-color: #4172f7;
  /* Shopify系の緑 #5E8E3E*/
}

.card--shopify:hover {
  background-color: #fff;
  color: #5E8E3E;
  border: 2px solid #5E8E3E;
}


/* スマホ（幅767px以下）では1列ずつ */
@media (max-width: 767px) {
  .shop-buttons {
    flex-direction: column;
  }

  .btn-shop {
    width: 100%;
    min-width: unset;
  }
}

/* ホバーを無効化するカード */
.card--static:hover {
  transform: none;
  box-shadow: var(--shadow);
  opacity: 1;
}