@charset "utf-8";
/* ============================================================
   Custom Properties
============================================================ */ :root {
  --color-primary: #1a6fa8;
  --color-primary-light: #eaf3fb;
  --color-primary-mid: #c2ddf0;
  --color-danger: #d9360b;
  --color-danger-light: #fff4f1;
  --color-danger-mid: #f5c3b3;
  --color-caution: #b45f00;
  --color-caution-light: #fff8f0;
  --color-caution-mid: #f5d9b0;
  --color-text: #1c1c1c;
  --color-text-sub: #555555;
  --color-border: #dde6ee;
  --color-bg: #f2f5f8;
  --color-white: #ffffff;
  --border-radius-base: 10px;
  --border-radius-sm: 6px;
  --shadow-base: 0 2px 8px rgba(0, 0, 0, 0.07);
}
/* ============================================================
   Block: product-page
   基本フォント設定・ラッパー
   font-size: 17px / line-height: 2.0 / letter-spacing: 0.06em
============================================================ */
#product-page__wrapper {
  max-width: 790px;
  margin: 0 auto;
  padding: 20px 16px 48px;
  font-family: "Hiragino Kaku Gothic ProN", "Hiragino Sans", Meiryo, sans-serif;
  font-size: 17px;
  line-height: 2.0;
  letter-spacing: 0.06em;
  color: var(--color-text);
  background: var(--color-bg);
}
/* 共通: p */
#product-page__wrapper p {
  margin-bottom: 14px;
}
#product-page__wrapper p:last-child {
  margin-bottom: 0;
}
/* 共通: a */
#product-page__wrapper a {
  color: var(--color-primary);
  font-weight: 700;
  overflow-wrap: break-word;
  text-underline-offset: 3px;
}
/* ============================================================
   Block: section-card
   各セクション共通カード
============================================================ */
.section-card {
  background: var(--color-white);
  border-radius: var(--border-radius-base);
  box-shadow: var(--shadow-base);
  padding: 24px 20px;
  margin-bottom: 16px;
}
/* 共通見出し h2 */
.section-card h2 {
  font-size: 20px;
  font-weight: 700;
  color: var(--color-text);
  padding: 0 0 10px 14px;
  border-left: 4px solid var(--color-primary);
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}
/* FAQ見出し h3 */
.section-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-danger);
  padding-bottom: 10px;
  border-bottom: 2px solid var(--color-danger-light);
  margin-bottom: 16px;
  letter-spacing: 0.04em;
}
/* ============================================================
   Block: product-intro
   商品説明文（SEO最適化・最上部配置）
============================================================ */
.product-intro {
  background: var(--color-white);
  border-radius: var(--border-radius-base);
  box-shadow: var(--shadow-base);
  padding: 24px 20px;
  margin-bottom: 16px;
}
.product-intro p {
  color: var(--color-text-sub);
}
.product-intro em {
  font-style: normal;
  font-weight: 700;
  color: var(--color-danger);
  background: #fff0ed;
  padding: 0 4px;
  border-bottom: 2px solid var(--color-danger);
}
/* ============================================================
   Block: size-check
   適合確認・重要インフォメーション（最優先表示）
============================================================ */
.size-check {
  background: var(--color-caution-light);
  border: 2px solid var(--color-caution-mid);
  border-radius: var(--border-radius-base);
  box-shadow: var(--shadow-base);
  padding: 24px 20px;
  margin-bottom: 16px;
}
.size-check__heading {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--color-caution);
  margin-bottom: 18px;
  letter-spacing: 0.04em;
}
.size-check__heading__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  min-width: 32px;
  background: var(--color-caution);
  color: var(--color-white);
  border-radius: 50%;
  font-size: 18px;
  font-weight: 700;
  line-height: 1;
}
/* サイズ表示ボックス */
.size-check__spec {
  background: var(--color-white);
  border: 1px solid var(--color-caution-mid);
  border-radius: 8px;
  padding: 20px 16px;
  margin-bottom: 18px;
  text-align: center;
}
.size-check__spec-label {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-caution);
  letter-spacing: 0.06em;
  margin-bottom: 6px;
}
.size-check__spec-main {
  font-size: 44px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  line-height: 1.2;
}
.size-check__spec-detail {
  font-size: 14px;
  font-weight: 700;
  color: var(--color-primary);
  letter-spacing: 0.04em;
  margin-top: 12px;
  margin-bottom: 0;
}
/* 確認ステップ */
.size-check__steps {
  list-style: none;
  counter-reset: step-counter;
  margin-bottom: 16px;
}
.size-check__steps li {
  counter-increment: step-counter;
  display: block;
  position: relative;
  padding: 12px 0 12px 72px;
  border-bottom: 1px solid var(--color-caution-mid);
  font-size: 16px;
  line-height: 1.8;
}
.size-check__steps li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}
.size-check__steps li::before {
  content: "STEP "counter(step-counter);
  position: absolute;
  left: 0;
  top: 14px;
  color: var(--color-caution);
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.06em;
  white-space: nowrap;
}
/* 注意書き */
.size-check__note {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--color-white);
  border-left: 3px solid var(--color-caution);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  padding: 10px 14px;
  font-size: 15px;
  font-weight: 700;
  color: var(--color-caution);
  margin-bottom: 0;
}
.size-check__note::before {
  content: "※";
  flex-shrink: 0;
}
/* ============================================================
   Block: feature-list
   商品特徴リスト
============================================================ */
.feature-list {
  list-style: none;
  margin-top: 14px;
}
.feature-list li {
  color: var(--color-text-sub);
  background: var(--color-primary-light);
  border-left: 3px solid var(--color-primary-mid);
  border-radius: 0 var(--border-radius-sm) var(--border-radius-sm) 0;
  padding: 10px 14px;
  margin-bottom: 8px;
}
.feature-list li:last-child {
  margin-bottom: 0;
}
/* ============================================================
   Block: spec-table
   仕様テーブル
============================================================ */
.spec-table {
  width: 100%;
  border-collapse: collapse;
}
.spec-table tr {
  border-bottom: 1px solid var(--color-border);
}
.spec-table tr:last-child {
  border-bottom: none;
}
.spec-table th {
  background: var(--color-primary-light);
  color: var(--color-primary);
  font-weight: 700;
  padding: 12px 14px;
  text-align: left;
  width: 36%;
  white-space: nowrap;
  vertical-align: middle;
}
.spec-table td {
  padding: 12px 14px;
  vertical-align: middle;
}
/* ============================================================
   Block: price-block
   価格セクション
============================================================ */
.price-block__badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--color-danger);
  color: var(--color-white);
  font-weight: 700;
  border-radius: 20px;
  padding: 6px 16px;
  margin-bottom: 16px;
  font-size: 16px;
}
.price-block__badge::before {
  content: "★";
  font-size: 13px;
}
.price-block ul {
  list-style: none;
}
.price-block li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
}
.price-block li:last-child {
  border-bottom: none;
}
.price-block p {
  color: var(--color-text-sub);
  margin-bottom: 0;
  font-size: 16px;
}
.price-block__link {
  font-size: 14px;
  color: var(--color-primary);
  text-decoration: none;
  display: block;
  margin-top: 2px;
  font-weight: 400;
}
.price-block__link:hover {
  text-decoration: underline;
}
.price-block__amount {
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text);
  white-space: nowrap;
  flex-shrink: 0;
}
.price-block__amount--total {
  font-size: 26px;
  color: var(--color-danger);
}
.tax-included {
  font-size: 14px;
}
/* ============================================================
   Block: faq-item
   Q&Aアコーディオン
============================================================ */
.faq-item {
  border: 1px solid var(--color-border);
  border-radius: 8px;
  margin-bottom: 10px;
  overflow: hidden;
}
.faq-item__summary {
  list-style: none;
  -webkit-tap-highlight-color: transparent;
  cursor: pointer;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  font-weight: 700;
  user-select: none;
  line-height: 1.7;
}
.faq-item__summary::-webkit-details-marker {
  display: none;
}
.faq-item__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 14px;
  font-weight: 700;
  border-radius: 4px;
  padding: 2px 10px;
  flex-shrink: 0;
  margin-top: 3px;
}
.faq-item__arrow {
  color: var(--color-primary);
  font-size: 12px;
  margin-top: 6px;
  transition: transform 0.25s ease;
  flex-shrink: 0;
}
.faq-item[open] .faq-item__arrow {
  transform: rotate(180deg);
}
.faq-item__answer {
  padding: 16px 18px;
  color: var(--color-text-sub);
  border-top: 1px solid var(--color-border);
  background: #fafcff;
}
/* ============================================================
   Block: alert / Modifier: --danger
============================================================ */
.alert--danger {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  background: var(--color-danger-light);
  border: 1px solid var(--color-danger-mid);
  border-radius: var(--border-radius-sm);
  padding: 10px 14px;
  font-weight: 700;
  color: var(--color-danger);
  margin-bottom: 12px;
}
.alert--danger::before {
  content: "×";
  flex-shrink: 0;
}
/* ============================================================
   Block: exchange-banner
============================================================ */
.exchange-banner {
  border-radius: var(--border-radius-base);
  overflow: hidden;
  box-shadow: var(--shadow-base);
}
.exchange-banner a {
  display: block;
}
.exchange-banner img {
  width: 100%;
  display: block;
}
@media screen and (max-width: 599px) {
  #product-page__wrapper {
    padding: 14px 10px 40px;
    font-size: 16px;
    letter-spacing: 0.04em;
  }
  .section-card, .product-intro, .size-check {
    padding: 18px 14px;
  }
  .section-card h2 {
    font-size: 18px;
    padding-left: 12px;
    margin-bottom: 14px;
  }
  .section-card h3 {
    font-size: 16px;
  }
  .size-check__heading {
    font-size: 16px;
    gap: 8px;
  }
  .size-check__heading__icon {
    width: 28px;
    height: 28px;
    min-width: 28px;
    font-size: 16px;
  }
  .size-check__spec-main {
    font-size: 36px;
  }
  .size-check__steps li {
    font-size: 15px;
    padding-left: 66px;
  }
  .spec-table th {
    width: 40%;
    font-size: 15px;
    padding: 10px 10px;
    white-space: normal;
  }
  .spec-table td {
    padding: 10px 10px;
    font-size: 15px;
  }
  .price-block__amount {
    font-size: 18px;
  }
  .price-block__amount--total {
    font-size: 22px;
  }
  .price-block p {
    font-size: 15px;
  }
  .faq-item__summary {
    padding: 14px 12px;
    gap: 10px;
    font-size: 15px;
  }
  .faq-item__answer {
    padding: 14px;
    font-size: 15px;
  }
}