/* バレル研磨とは（page-about-barrel-polishing.php）
   デザイン: build_a_sub4.py about_page()。文言は旧テンプレートのまま、レイアウトだけ案Aに寄せる */

/* ページタイトル帯: 長い見出し用に帯を高くし、写真窓の切り口を右へ寄せる（デザイン h=540 / 上端 x=1220） */
@media (min-width: 901px) {
  .rn-hero { --hero-h: 540px; --hero-top: 84.7vw; }
  .rn-hero__body { max-width: min(800px, calc(var(--hero-bot) - var(--rn-pad) - 60px)); }
  .rn-hero--m .rn-hero__title { font-size: clamp(30px, 2.8vw, 40px); line-height: 1.3; }
}

/* 01 基本原理（暗い地） */
.rn-abp__principle { display: flex; align-items: flex-start; gap: 60px; margin-top: 40px; }
.rn-abp__principle-text { flex: 1; min-width: 0; }
.rn-abp__principle-main { font-size: 16px; line-height: 2.1; color: #fff; }
.rn-abp__principle-sub { margin-top: 18px; font-size: 14.5px; line-height: 2.1; color: var(--rn-sub-dark); }
.rn-abp__drum { width: 600px; max-width: 46%; flex-shrink: 0; }
.rn-abp__drum .rn-cta__drum { display: block; width: 100%; max-width: none; height: auto; }
.rn-abp__elements { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; margin-top: 20px; }
.rn-abp__element { padding-top: 20px; border-top: 1px solid var(--rn-gold); }
.rn-abp__element > span { display: block; font-size: 10.5px; color: var(--rn-gold-on-dark); }
.rn-abp__element h3 { margin-top: 6px; font-size: 21px; color: #fff; }
.rn-abp__element p { margin-top: 8px; font-size: 13.5px; line-height: 1.9; color: var(--rn-sub-dark); }

/* 02 できること（カードは高さ・上端を揃える） */
.rn-abp__caps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-top: 40px; align-items: stretch; }
.rn-abp__cap { padding: 30px 30px 32px; background: #fff; color: var(--rn-ink); }
.rn-abp__cap-icon { margin: -4px 0 18px; padding: 14px 0 10px; border-bottom: 1px solid rgba(17, 18, 20, 0.12); color: var(--rn-ink); }
.rn-abp__cap-icon svg { display: block; width: 100%; max-width: 300px; height: auto; }
.rn-abp__cap-row { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; }
.rn-abp__cap-num { font-size: 44px; font-weight: 300; line-height: 1; color: transparent; -webkit-text-stroke: 1px var(--rn-ink); }
.rn-abp__cap-row .rn-mono { font-size: 10.5px; color: rgba(17, 18, 20, 0.6); }
.rn-abp__cap h3 { margin-top: 16px; font-size: 23px; line-height: 1.4; }
.rn-abp__cap p { margin-top: 10px; font-size: 13.5px; line-height: 1.9; color: var(--rn-sub-light); }

/* 03 メリット・デメリット */
.rn-abp__proscons { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 72px; margin-top: 40px; }
.rn-abp__pc-heading { font-family: var(--rn-font-mono); font-size: 11px; font-weight: 400; letter-spacing: .08em; color: var(--rn-ink); }
.rn-abp__pc-heading .rn-mono { letter-spacing: inherit; }
.rn-abp__pc-list { margin-top: 8px; }
.rn-abp__pc-list li { display: flex; flex-direction: column; padding: 18px 0; border-top: 1px solid var(--rn-line-light); }
.rn-abp__pc-list strong { font-size: 19px; line-height: 1.5; color: var(--rn-ink); }
.rn-abp__pc-text { margin-top: 6px; font-size: 13.5px; line-height: 1.9; color: var(--rn-sub-light); }
.rn-abp__pc-note { display: flex; align-items: center; gap: 10px; margin-top: 6px; font-size: 13.5px; font-weight: 700; line-height: 1.7; color: var(--rn-ink); }
.rn-abp__pc-note .rn-mark { width: 10px; height: 10px; }

/* 表（罫線だけの表。04 は暗い地、05 は白地） */
.rn-abp__table-wrap { margin-top: 40px; }
.rn-abp__table { width: 100%; border-collapse: collapse; table-layout: fixed; }
.rn-abp__table thead th { padding: 0 16px 12px 0; font-family: var(--rn-font-mono); font-size: 11px; font-weight: 400; letter-spacing: .08em; text-align: left; }
.rn-abp__table tbody th, .rn-abp__table tbody td { padding: 14px 16px 14px 0; border-top: 1px solid var(--rn-line-light); text-align: left; vertical-align: middle; }
.rn-abp__table tbody tr:last-child th, .rn-abp__table tbody tr:last-child td { border-bottom: 1px solid var(--rn-line-light); }
.rn-abp__table--vs thead th:first-child { width: 220px; }
.rn-abp__table--vs thead th { color: var(--rn-gold-on-dark); }
.rn-abp__table--vs tbody th, .rn-abp__table--vs tbody td { height: 60px; border-color: var(--rn-line-dark) !important; }
.rn-abp__table--vs tbody th { font-size: 14px; font-weight: 700; color: #fff; }
.rn-abp__table--vs tbody td { font-size: 14.5px; color: #fff; }
.rn-abp__table--vs tbody td:last-child { color: var(--rn-sub-dark); }
.rn-abp__table--types thead th:first-child { width: 240px; }
.rn-abp__table--types thead th { color: rgba(17, 18, 20, 0.65); }
.rn-abp__table--types tbody th, .rn-abp__table--types tbody td { height: 64px; }
.rn-abp__table--types tbody th { font-size: 20px; color: var(--rn-ink); }
.rn-abp__table--types tbody td { font-size: 14.5px; color: var(--rn-ink); }
.rn-abp__table--types tbody td:last-child { font-size: 14px; color: var(--rn-sub-light); }

.rn-abp__guides { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 36px; }
.rn-abp__guide { padding: 26px 30px; border: 1px solid rgba(255, 255, 255, 0.3); }
.rn-abp__guide.is-barrel { border-color: var(--rn-gold); }
.rn-abp__guide h4 { font-size: 18px; color: #fff; }
.rn-abp__guide p { margin-top: 8px; font-size: 14px; line-height: 1.8; color: var(--rn-sub-dark); }

/* 個別バレル（当社の強み） */
.rn-abp__highlight { display: flex; align-items: center; gap: 40px; margin-top: 36px; padding: 28px 32px; background: var(--rn-ink); color: #fff; }
.rn-abp__highlight-photo { width: 200px; height: 130px; flex-shrink: 0; overflow: hidden; }
.rn-abp__highlight-photo img { width: 100%; height: 100%; object-fit: cover; }
.rn-abp__highlight-body { flex: 1; min-width: 0; }
.rn-abp__highlight-body .rn-mono { display: block; font-size: 11px; color: var(--rn-gold-on-dark); }
.rn-abp__highlight-body h3 { margin-top: 4px; font-size: 24px; color: #fff; }
.rn-abp__highlight-body p { margin-top: 6px; font-size: 14px; line-height: 1.8; color: var(--rn-sub-dark); }
.rn-abp__highlight-link { display: flex; align-items: center; gap: 12px; flex-shrink: 0; font-size: 14px; font-weight: 700; color: #fff; }
.rn-abp__highlight-link .rn-arrow { width: 16px; height: 16px; color: var(--rn-gold-on-dark); }
.rn-abp__highlight-link:hover { color: var(--rn-gold-on-dark); }

@media (max-width: 1100px) {
  .rn-abp__caps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .rn-abp__highlight { flex-wrap: wrap; }
  .rn-abp__highlight-link { flex-basis: 100%; }
}
@media (max-width: 900px) {
  .rn-abp br, .rn-hero__title br { display: none; }
  .rn-abp__principle { flex-direction: column; align-items: stretch; gap: 28px; margin-top: 28px; }
  .rn-abp__principle-main { font-size: 15px; line-height: 2; }
  .rn-abp__principle-sub { font-size: 14px; line-height: 2; }
  .rn-abp__drum { width: 100%; max-width: 360px; margin: 0 auto; }
  .rn-abp__elements { grid-template-columns: 1fr; gap: 24px; margin-top: 28px; }
  .rn-abp__caps { grid-template-columns: 1fr; margin-top: 28px; }
  .rn-abp__cap { padding: 24px 22px 26px; }
  .rn-abp__cap h3 { font-size: 20px; }
  .rn-abp__proscons { grid-template-columns: 1fr; gap: 36px; margin-top: 28px; }
  .rn-abp__pc-list strong { font-size: 17px; }
  .rn-abp__table-wrap { margin-top: 28px; }
  /* 表は行ごとの縦積みにして横スクロールを出さない */
  .rn-abp__table, .rn-abp__table tbody, .rn-abp__table tr, .rn-abp__table th, .rn-abp__table td { display: block; width: auto !important; }
  .rn-abp__table thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); }
  .rn-abp__table tbody tr { padding: 14px 0; border-top: 1px solid var(--rn-line-light); }
  .rn-abp__table--vs tbody tr { border-color: var(--rn-line-dark); }
  .rn-abp__table tbody tr:last-child { border-bottom: 1px solid var(--rn-line-light); }
  .rn-abp__table--vs tbody tr:last-child { border-bottom-color: var(--rn-line-dark); }
  .rn-abp__table tbody th, .rn-abp__table tbody td { height: auto !important; padding: 0; border: 0 !important; }
  .rn-abp__table tbody td { margin-top: 4px; font-size: 14px !important; line-height: 1.8; }
  .rn-abp__table--types tbody th { font-size: 18px; }
  .rn-abp__table tbody td::before { display: block; font-family: var(--rn-font-mono); font-size: 10.5px; letter-spacing: .08em; }
  .rn-abp__table--vs tbody td:nth-of-type(1)::before { content: "バレル研磨"; color: var(--rn-gold-on-dark); }
  .rn-abp__table--vs tbody td:nth-of-type(2)::before { content: "バフ研磨"; color: var(--rn-gold-on-dark); }
  .rn-abp__table--types tbody td:nth-of-type(1)::before { content: "特徴"; color: rgba(17, 18, 20, 0.6); }
  .rn-abp__table--types tbody td:nth-of-type(2)::before { content: "主な用途"; color: rgba(17, 18, 20, 0.6); }
  .rn-abp__guides { grid-template-columns: 1fr; gap: 14px; margin-top: 28px; }
  .rn-abp__guide { padding: 22px 22px; }
  .rn-abp__highlight { flex-direction: column; align-items: stretch; gap: 18px; padding: 24px 22px; }
  .rn-abp__highlight-photo { width: 100%; height: auto; aspect-ratio: 20 / 13; }
  .rn-abp__highlight-body h3 { font-size: 21px; }
}