/* =========================================================
   POTEX — コラム（記事）専用スタイル v2（2026-08-18 全面改修）
   正: /DESIGN-GUIDELINE.html（変更はガイドライン→ここ の順）
   コラム配下のみ読み込み。potex.css（コーポレート共通）は触らない。
   背景は真っ白・本文はニュートラル黒・見出しはゴシック太字。
   ========================================================= */

:root {
  --col-maxw: 720px;
  --col-text: #23272e;
  --col-muted: #5c6572;
  --col-line: #e6e9ef;
  --col-surface: #f6f7f9;
  --col-sans: -apple-system, BlinkMacSystemFont, "Helvetica Neue",
    "Hiragino Kaku Gothic ProN", "Noto Sans JP", sans-serif;
  /* 角丸スケール（コーポレート potex.css の16px系に揃える） */
  --r-lg: 4px;  /* カード・アイキャッチ・バナー・CTA・著者/動画などの大きな面 */
  --r-md: 4px;  /* 表・目次・補足など本文内のブロック */
  --r-sm: 2px;  /* サイドバーのサムネなど小さな要素 */
}

body { background: #fff; color: var(--col-text); }

.col-main {
  padding: 128px clamp(20px, 4vw, 48px) 0;
  max-width: 1240px;
  margin: 0 auto;
}

/* ---------- 2カラムレイアウト（メイン＋右サイドバー） ---------- */
.col-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: clamp(32px, 4vw, 56px);
  align-items: start;
}
.col-primary { min-width: 0; }
.col-side { min-width: 0; align-self: stretch; }
.side-sticky { position: sticky; top: 92px; }
.side-block { margin: 0 0 28px; }
.side-title {
  font-size: 16px; font-weight: 800; color: var(--col-text);
  letter-spacing: 0.02em; margin: 0 0 14px; padding-left: 12px; position: relative;
}
.side-title::before {
  content: ''; position: absolute; left: 0; top: 4px; bottom: 4px;
  width: 4px; background: var(--navy); border-radius: 2px;
}
.side-bannerwrap { margin-bottom: 32px; }
.col-banner { display: block; border-radius: var(--r-lg); overflow: hidden; box-shadow: 0 8px 24px rgba(23,33,52,0.12); transition: transform .25s ease, box-shadow .25s ease; }
.col-banner:hover { transform: translateY(-2px); box-shadow: 0 14px 32px rgba(23,33,52,0.18); }
.col-banner img { display: block; width: 100%; height: auto; }
.side-rank__item {
  display: grid; grid-template-columns: 26px 92px minmax(0, 1fr);
  gap: 10px; align-items: start;
  padding: 10px 0; border-bottom: 1px solid var(--col-line);
}
.side-rank__item:last-child { border-bottom: 0; }
.side-rank__num {
  width: 24px; height: 24px; display: flex; align-items: center; justify-content: center;
  background: var(--navy); color: #fff; font-size: 12.5px; font-weight: 800; border-radius: var(--r-sm);
}
.side-rank__thumb img { display: block; width: 100%; height: auto; aspect-ratio: 1200/630; object-fit: cover; border-radius: var(--r-sm); }
.side-rank__thumb:empty { display: none; }
.side-rank__item:has(.side-rank__thumb:empty) { grid-template-columns: 26px minmax(0, 1fr); }
.side-rank__title { font-size: 13px; font-weight: 700; line-height: 1.6; color: var(--col-text); }
.side-rank__item:hover .side-rank__title { color: var(--accent); }
.side-cats { display: flex; flex-direction: column; }
.side-cats a {
  display: flex; align-items: center; justify-content: space-between;
  font-size: 14px; font-weight: 600; color: var(--col-text);
  padding: 11px 2px; border-bottom: 1px solid var(--col-line);
}
.side-cats a:hover, .side-cats a[aria-current] { color: var(--navy); }
.side-cats__n { font-size: 12px; color: var(--col-muted); }
.side-toc ol { margin: 0; padding: 0 0 0 2px; counter-reset: stoc; list-style: none; max-height: calc(100vh - 200px); overflow-y: auto; }
.side-toc li { counter-increment: stoc; margin: 0 0 10px; font-size: 13px; line-height: 1.65; display: flex; gap: 10px; }
.side-toc li::before {
  content: counter(stoc, decimal-leading-zero);
  font-size: 12px; font-weight: 800; color: var(--accent); flex: 0 0 auto; padding-top: 1px;
}
.side-toc a { color: var(--col-text); }
.side-toc a:hover { color: var(--accent); }

/* ---------- 記事ヒーロー（紺の色面・promonista式） ---------- */
.col-arthero {
  background:
    linear-gradient(130deg, rgba(16, 32, 74, 0.88) 0%, rgba(30, 58, 110, 0.82) 60%, rgba(36, 80, 156, 0.72) 130%),
    url("/img/brand-1.jpg") center 30% / cover no-repeat;
  padding: 108px clamp(20px, 4vw, 48px) clamp(34px, 5vh, 48px);
}
.col-arthero__inner { max-width: 1240px; margin: 0 auto; }
.col-arthero .col-crumb { margin-bottom: 22px; font-size: 13px; text-shadow: 0 1px 8px rgba(10,20,45,0.45); }
.col-arthero .col-crumb a { color: rgba(255,255,255,0.94); border-bottom: 1px solid rgba(255,255,255,0.38); }
.col-arthero .col-crumb span { color: rgba(255,255,255,0.62); }
.col-arthero .col-crumb a:hover { color: #fff; border-color: #fff; }
.col-arthero__cat {
  font-family: var(--col-sans);
  display: inline-block; font-size: 12px; font-weight: 700; letter-spacing: 0.05em;
  color: #fff; border: 1px solid rgba(255,255,255,0.55); border-radius: 999px;
  padding: 4px 14px; margin: 0 0 16px;
}
.col-arthero__title {
  font-family: var(--col-sans);
  font-size: clamp(25px, 3.2vw, 34px); font-weight: 800;
  line-height: 1.55; letter-spacing: 0.02em; color: #fff;
  margin: 0 0 18px; max-width: 26em;
}
.col-arthero__meta {
  display: flex; flex-wrap: wrap; gap: 14px 20px;
  font-size: 13px; color: rgba(255,255,255,0.75); margin: 0;
}
.col-arthero__author a { color: rgba(255,255,255,0.9); border-bottom: 1px solid rgba(255,255,255,0.4); }
.col-arthero__author a:hover { color: #fff; }
.col-arthero + .col-main { padding-top: clamp(32px, 5vh, 48px); }
.col-hero + .col-main { padding-top: clamp(36px, 5vh, 56px); }

/* アイキャッチ（本文冒頭・SATORI式） */
.col-eyecatch {
  display: block; width: 100%; height: auto;
  aspect-ratio: 1200 / 630; object-fit: cover;
  border-radius: var(--r-lg); border: 1px solid var(--col-line);
  margin: 0 0 clamp(24px, 4vh, 36px);
}

/* ---------- ページヘッダ（一覧） ---------- */
.col-pagehead { margin: 0 0 clamp(22px, 3vh, 32px); }
.col-label {
  font-size: 13px; font-weight: 700; letter-spacing: 0.08em; color: var(--col-muted);
  margin: 0 0 10px; padding-left: 16px; position: relative;
}
.col-label::before {
  content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%);
  width: 9px; height: 9px; background: var(--navy); border-radius: 2px;
}
.col-pagetitle { font-size: clamp(27px, 3.6vw, 38px); font-weight: 800; line-height: 1.4; letter-spacing: 0.02em; color: var(--col-text); margin: 0 0 14px; }
.col-pagelead { font-size: 14.5px; line-height: 1.95; color: var(--col-muted); margin: 0; max-width: 46em; }

/* ---------- リスト行（一覧・カテゴリ） ---------- */
.col-rows { display: flex; flex-direction: column; }
.col-row {
  display: grid; grid-template-columns: minmax(200px, 300px) minmax(0, 1fr);
  gap: clamp(16px, 2.4vw, 28px);
  padding: clamp(18px, 2.6vh, 26px) 0;
  border-bottom: 1px solid var(--col-line);
  align-items: start;
}
.col-row:first-child { padding-top: 4px; }
.col-row__img {
  display: block; width: 100%; height: auto;
  aspect-ratio: 1200 / 630; object-fit: cover; border-radius: var(--r-lg);
  border: 1px solid var(--col-line);
}
.col-row__img--empty {
  display: flex; align-items: center; justify-content: center;
  background: var(--navy); color: #fff; font-size: 14px; font-weight: 700; letter-spacing: 0.1em;
}
.col-row__body { display: block; }
.col-row__cat {
  display: inline-block; font-size: 11.5px; font-weight: 700; color: var(--navy);
  background: rgba(30,58,110,0.08); border-radius: 999px; padding: 3px 12px; margin: 0 0 10px;
}
.col-row__title { display: block; font-size: clamp(16px, 1.6vw, 18.5px); font-weight: 700; line-height: 1.6; color: var(--col-text); margin: 0 0 8px; }
.col-row:hover .col-row__title { color: var(--accent); }
.col-row__date { display: block; font-size: 12.5px; color: var(--col-muted); margin: 0 0 8px; }
.col-row__desc {
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  font-size: 13.5px; line-height: 1.8; color: var(--col-muted);
}

/* ---------- シェアボタン（記事・左固定） ---------- */
.col-share { position: fixed; left: 22px; top: 45%; display: flex; flex-direction: column; gap: 12px; z-index: 30; }
.col-share a {
  width: 44px; height: 44px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 12px; font-weight: 800; color: #fff;
  box-shadow: 0 6px 16px rgba(23,33,52,0.18);
  transition: transform .2s ease;
}
.col-share a:hover { transform: translateY(-2px); }
.col-share__x { background: #0f1114; }
.col-share__line { background: #06c755; font-size: 10px; }
@media (max-width: 1420px) { .col-share { display: none; } }

/* コラム配下の見出しはゴシック太字（明朝は使わない） */
.col-main h1, .col-main h2, .col-main h3, .col-main h4 {
  font-family: var(--col-sans);
  font-weight: 700;
}

/* ---------- パンくず ---------- */
.col-crumb {
  font-size: 12px;
  letter-spacing: 0.04em;
  color: var(--col-muted);
  margin-bottom: clamp(24px, 4vh, 40px);
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
}
.col-crumb a { color: var(--col-muted); border-bottom: 1px solid transparent; transition: color .2s ease, border-color .2s ease; }
.col-crumb a:hover { color: var(--navy); border-color: rgba(30,58,110,0.3); }
.col-crumb span[aria-current] { color: var(--navy); font-weight: 700; }

/* ---------- カテゴリタブ ---------- */
.col-tabs {
  display: flex; gap: 10px; flex-wrap: nowrap;
  overflow-x: auto; -webkit-overflow-scrolling: touch;
  padding-bottom: 6px;
  margin: 0 0 clamp(28px, 4vh, 40px);
}
.col-tabs a {
  flex: 0 0 auto;
  font-size: 13.5px; font-weight: 700; letter-spacing: 0.03em;
  color: var(--navy);
  background: #fff;
  border: 1px solid var(--col-line);
  border-radius: 999px;
  padding: 9px 22px;
  transition: background .2s ease, color .2s ease, border-color .2s ease;
}
.col-tabs a:hover { border-color: var(--navy); }
.col-tabs a.is-active { background: var(--navy); color: #fff; border-color: var(--navy); }

/* ---------- 記事ヘッダ ---------- */
.col-head { border-bottom: 1px solid var(--col-line); padding-bottom: clamp(24px, 4vh, 36px); }
.col-head__cat { margin: 0 0 16px; }
.col-head__cat, .col-card__cat {
  display: inline-block;
  font-family: var(--col-sans);
  font-size: 12px; font-weight: 700; letter-spacing: 0.04em;
  color: var(--navy);
  background: rgba(30, 58, 110, 0.08);
  border-radius: 999px;
  padding: 4px 14px;
  text-transform: none;
}
.col-head h1 {
  font-size: clamp(26px, 3.4vw, 34px);
  font-weight: 800;
  line-height: 1.52;
  letter-spacing: 0.02em;
  margin: 0 0 20px;
  color: var(--navy);
}
.col-head__meta {
  display: flex; flex-wrap: wrap; gap: 16px;
  font-size: 13px; color: var(--col-muted); margin: 0 0 10px;
  letter-spacing: 0.03em;
}
.col-head__author { font-size: 13px; color: var(--col-muted); margin: 0; letter-spacing: 0.03em; }
.col-head__author a { border-bottom: 1px solid rgba(30,58,110,0.25); }
.col-head__author a:hover { border-color: var(--navy); color: var(--navy); }

/* ---------- リード ---------- */
.col-lead {
  margin: clamp(28px, 5vh, 40px) 0 0;
  padding: 0 0 clamp(24px, 4vh, 34px);
  border-bottom: 1px solid var(--col-line);
}
.col-lead p { margin: 0 0 1.1em; font-size: 16.5px; line-height: 2.0; color: var(--col-text); }
.col-lead p:last-child { margin-bottom: 0; }

/* ---------- 目次 ---------- */
.col-toc {
  margin: clamp(32px, 5vh, 44px) 0;
  padding: 22px 26px 10px;
  background: #fff;
  border: 1px solid var(--col-line);
  border-radius: var(--r-md);
}
.col-toc__title {
  font-size: 13px; font-weight: 700; letter-spacing: 0.14em;
  color: var(--navy); margin: 0 0 14px;
  font-family: var(--col-sans); text-transform: none;
}
.col-toc ol { margin: 0; padding-left: 1.9em; counter-reset: toc; list-style: none; }
.col-toc li { counter-increment: toc; padding: 10px 0; font-size: 14.5px; font-weight: 600; line-height: 1.7; position: relative; border-top: 1px solid var(--col-line); }
.col-toc li:first-child { border-top: 0; }
.col-toc li::before {
  content: counter(toc) '.';
  position: absolute; left: -1.9em;
  font-size: 13.5px; font-weight: 800;
  color: var(--accent); top: 12px;
}
.col-toc a { color: var(--col-text); border-bottom: 1px solid transparent; }
.col-toc a:hover { color: var(--navy); border-color: rgba(30,58,110,0.3); }

@media (min-width: 1024px) { .col-article .col-toc { display: none; } }

/* ---------- 本文 ---------- */
.col-body { padding-bottom: clamp(40px, 7vh, 72px); }
.col-body h2 {
  font-size: clamp(22px, 2.8vw, 28px);
  font-weight: 800;
  line-height: 1.5; letter-spacing: 0.02em;
  margin: clamp(56px, 8vh, 84px) 0 20px;
  color: var(--col-text);
  scroll-margin-top: 90px;
}
.col-body h3 {
  font-size: clamp(17.5px, 2vw, 20px);
  font-weight: 700;
  line-height: 1.6; letter-spacing: 0.02em;
  margin: clamp(38px, 5vh, 52px) 0 14px;
  padding-left: 14px;
  border-left: 4px solid var(--navy);
  color: var(--col-text);
  scroll-margin-top: 90px;
}
.col-body p {
  font-size: 16px; line-height: 1.95; letter-spacing: 0.02em;
  color: var(--col-text); margin: 0 0 1.5em;
}
.col-body strong { font-weight: 700; color: var(--navy); }
.col-body u, .col-lead u {
  text-decoration: underline;
  text-decoration-color: rgba(30,58,110,0.4);
  text-decoration-thickness: 2px;
  text-underline-offset: 5px;
}
.col-body a {
  color: var(--accent);
  border-bottom: 1px solid rgba(36,80,156,0.35);
  transition: border-color .2s ease;
}
.col-body a:hover { border-color: var(--accent); }
.col-body ul, .col-body ol { margin: 0 0 1.6em; padding-left: 1.5em; }
.col-body li { font-size: 16px; line-height: 1.9; color: var(--col-text); margin-bottom: 0.7em; }
.col-body li::marker { color: rgba(30,58,110,0.55); font-weight: 700; }
.col-body blockquote {
  margin: 1.8em 0; padding: 4px 0 4px 22px;
  border-left: 2px solid rgba(30,58,110,0.22);
  color: var(--col-muted); font-size: 15px; line-height: 1.9;
}
.col-body blockquote p:last-child { margin-bottom: 0; }
.col-body hr { border: 0; border-top: 1px solid var(--col-line); margin: clamp(44px, 6vh, 64px) 0; }

/* 表: ヘッダは紺地白文字・偶数行に薄い面 */
.col-table { overflow-x: auto; margin: 0 0 1.9em; -webkit-overflow-scrolling: touch; border-radius: var(--r-md); border: 1px solid var(--col-line); }
.col-body table { border-collapse: collapse; width: 100%; min-width: 460px; font-size: 14.5px; }
.col-body th, .col-body td {
  padding: 12px 16px; text-align: left; line-height: 1.75;
  vertical-align: top;
}
.col-body th {
  font-weight: 700; color: #fff; background: var(--navy);
  white-space: nowrap; letter-spacing: 0.03em;
}
.col-body td { color: var(--col-text); border-bottom: 1px solid var(--col-line); }
.col-body tbody tr:nth-child(even) td { background: #fafbfc; }
.col-body tbody tr:last-child td { border-bottom: 0; }

/* 補足ボックス */
.col-note {
  margin: 0 0 1.9em; padding: 20px 24px;
  background: #fff; border: 1px solid var(--col-line); border-radius: var(--r-md);
}
.col-note__label {
  font-family: var(--col-sans); font-size: 12px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: none;
  color: var(--navy); margin: 0 0 10px;
}
.col-note p { font-size: 14.5px; margin: 0 0 0.9em; }
.col-note p:last-child { margin-bottom: 0; }

/* FAQ */
.col-faq { margin: 0 0 1.9em; border-top: 1px solid var(--col-line); }
.col-faq__item { border-bottom: 1px solid var(--col-line); padding: 22px 0; }
.col-faq__q {
  font-family: var(--col-sans);
  font-weight: 700; font-size: 16.5px; color: var(--navy);
  margin: 0 0 10px; line-height: 1.7;
  padding-left: 1.7em; position: relative;
}
.col-faq__q::before {
  content: 'Q.'; position: absolute; left: 0; top: 0;
  font-weight: 800; color: var(--accent);
}
.col-faq__a { font-size: 15px; line-height: 1.9; color: var(--col-text); margin: 0; }

/* 出典リスト */
.col-refs { margin: clamp(40px, 6vh, 60px) 0 0; padding-top: 24px; border-top: 1px solid var(--col-line); }
.col-refs__title { font-family: var(--col-sans); font-size: 12.5px; font-weight: 700; letter-spacing: 0.12em; text-transform: none; color: var(--navy); margin: 0 0 12px; }
.col-refs ol { padding-left: 1.3em; margin: 0; }
.col-refs li { font-size: 13px; line-height: 1.85; color: var(--col-muted); margin-bottom: 8px; }

/* ---------- スクリーンショット・図解 ---------- */
.col-shot { margin: 2em 0 2.2em; }
.col-shot img {
  width: 100%; height: auto; border: 1px solid var(--col-line);
  border-radius: var(--r-lg); background: var(--col-surface);
}
.col-shot figcaption {
  margin-top: 10px; font-size: 12.5px; line-height: 1.75;
  color: var(--col-muted); letter-spacing: 0.02em;
}

/* ---------- 動画ファサード ---------- */
.col-video { margin: 2.2em 0 2.4em; }
.col-video__btn {
  display: block; position: relative; width: 100%; padding: 0;
  border: 1px solid var(--col-line); border-radius: var(--r-lg); overflow: hidden;
  background: var(--ink); cursor: pointer; line-height: 0;
}
.col-video__btn img { width: 100%; height: auto; transition: opacity .3s ease, transform .5s ease; }
.col-video__btn:hover img { opacity: .82; transform: scale(1.015); }
.col-video__play {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 74px; height: 52px; border-radius: 6px;
  background: rgba(15, 24, 44, 0.78);
  transition: background .25s ease;
  display: flex; align-items: center; justify-content: center;
}
.col-video__btn:hover .col-video__play { background: #c00; }
.col-video__play::after {
  content: ''; width: 0; height: 0;
  border-left: 17px solid #fff;
  border-top: 10px solid transparent;
  border-bottom: 10px solid transparent;
  margin-left: 4px;
}
.col-video iframe { width: 100%; aspect-ratio: 16/9; border: 0; border-radius: var(--r-lg); display: block; }
.col-video__cap { margin-top: 10px; font-size: 12.5px; line-height: 1.75; color: var(--col-muted); }

/* ---------- CTA（POTEX本体 personal.html のコンポーネントをそのまま使う） ---------- */
.col-cta {
  margin: clamp(44px, 6vh, 68px) 0 0;
  padding: clamp(36px, 5vw, 56px) clamp(22px, 4vw, 48px);
  border-radius: var(--r-lg);
  text-align: center;
}
/* 動画CTA: 白地＋細罫線 */
.col-cta--video { background: #fff; border: 1px solid var(--col-line); }
/* LINE CTA: コーポレートの .cta-band と同じ濃紺（面で見せる） */
.col-cta--line { background: var(--ink); color: #fff; }
.col-cta__eyebrow {
  display: inline-block;
  font-family: var(--col-sans); font-size: 12px; font-weight: 800;
  letter-spacing: 0.14em; color: var(--navy);
  border-bottom: 2px solid var(--navy);
  padding: 0 2px 5px; margin: 0 0 18px;
}
.col-cta__title {
  font-size: clamp(21px, 2.8vw, 28px); line-height: 1.55;
  letter-spacing: 0.02em; margin: 0 0 14px; color: var(--col-text);
  font-family: var(--col-sans); font-weight: 800;
}
.col-cta--line .col-cta__title { color: #fff; }
.col-cta__text {
  font-size: 15px; line-height: 1.95; color: var(--col-text);
  margin: 0 auto 28px; max-width: 32em;
}
.col-cta--line .col-cta__text { color: rgba(255,255,255,0.8); }
.col-cta__sub { font-size: 13px; line-height: 1.8; color: var(--col-muted); margin: 22px 0 0; }
.col-cta--line .col-cta__sub { color: rgba(255,255,255,0.6); }
.col-cta--line .col-cta__sub a { color: rgba(255,255,255,0.9); }

/* LINEボタン（personal.html と同一） */
.line-cta {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 18px 42px; border-radius: 999px;
  background: #06c755; color: #fff !important;
  font-size: 14px; font-weight: 700; letter-spacing: 0.1em;
  box-shadow: 0 12px 30px rgba(6, 199, 85, 0.32);
  transition: background 0.3s ease, transform 0.4s cubic-bezier(0.2,0.8,0.2,1), box-shadow 0.4s ease;
}
.line-cta:hover { background: #05b34c; transform: translateY(-3px); box-shadow: 0 18px 40px rgba(6,199,85,0.4); }
.line-cta .arrow { transition: transform 0.35s cubic-bezier(0.2,0.8,0.2,1); }
.line-cta:hover .arrow { transform: translateX(6px); }
.line-note { margin-top: 14px; font-size: 12px; color: rgba(255,255,255,0.6); letter-spacing: 0.06em; }

/* ---------- 著者ボックス（写真つき・ving/taskul式） ---------- */
.col-author {
  margin: clamp(32px, 5vh, 48px) 0 0;
  padding: clamp(26px, 3.5vw, 34px);
  background: #fff; border: 1px solid var(--col-line); border-radius: var(--r-lg);
}
.col-author__label {
  font-family: var(--col-sans); font-size: 12px; font-weight: 800;
  letter-spacing: 0.12em; color: var(--navy); margin: 0 0 20px;
  padding-left: 12px; position: relative;
}
.col-author__label::before {
  content: ''; position: absolute; left: 0; top: 2px; bottom: 2px;
  width: 4px; background: var(--navy); border-radius: 2px;
}
.col-author__inner {
  display: grid; grid-template-columns: 96px minmax(0, 1fr);
  gap: clamp(18px, 2.4vw, 26px); align-items: start;
}
.col-author__avatar {
  display: block; width: 96px; height: 96px; border-radius: 50%;
  overflow: hidden; border: 1px solid var(--col-line); background: var(--col-surface);
}
.col-author__avatar img { width: 100%; height: 100%; object-fit: cover; object-position: center 18%; display: block; }
.col-author__name {
  font-family: var(--col-sans); font-size: 17px; font-weight: 800;
  color: var(--col-text); margin: 0 0 12px; letter-spacing: 0.02em;
}
.col-author__name a { color: var(--col-text); border-bottom: 1px solid rgba(30,58,110,0.28); }
.col-author__name a:hover { color: var(--navy); }
.col-author__name span {
  display: block; font-size: 12.5px; font-weight: 600; color: var(--col-muted);
  margin-top: 6px; letter-spacing: 0.04em;
}
.col-author__bio { font-size: 14px; line-height: 1.9; color: var(--col-text); margin: 0 0 14px; }
.col-author__links { display: flex; flex-wrap: wrap; gap: 8px 20px; margin: 0; }
.col-author__links a {
  font-size: 13px; font-weight: 600; color: var(--accent);
  border-bottom: 1px solid rgba(36,80,156,0.3);
}
.col-author__links a:hover { border-color: var(--accent); }
.col-author--line { margin-top: clamp(40px, 6vh, 64px); }
@media (max-width: 560px) {
  .col-author__inner { grid-template-columns: 72px minmax(0, 1fr); gap: 16px; }
  .col-author__avatar { width: 72px; height: 72px; }
}

/* ---------- 関連記事・カード ---------- */
.col-related, .col-catsection, .col-pillars, .col-authorarticles { margin: clamp(48px, 7vh, 76px) 0 0; }
.col-related__title, .col-cathead__h2 {
  font-size: clamp(19px, 2.2vw, 22px); letter-spacing: 0.02em;
  margin: 0 0 22px; padding-bottom: 12px; border-bottom: 2px solid var(--col-line);
  color: var(--navy);
}
.col-cards {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: clamp(20px, 2.4vw, 26px);
}
.col-primary .col-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
@media (max-width: 600px) { .col-primary .col-cards { grid-template-columns: 1fr; } }
.col-card {
  display: block; background: #fff;
  padding: 0 0 20px;
  border: 1px solid var(--col-line);
  border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
}
.col-card:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px rgba(23, 33, 52, 0.10);
  border-color: rgba(30,58,110,0.22);
}
.col-card__img {
  display: block; width: 100%; height: auto;
  aspect-ratio: 1200 / 630; object-fit: cover;
  margin: 0 0 16px;
  border-bottom: 1px solid var(--col-line);
}
.col-card__cat { margin: 0 18px 12px; }
.col-card > .col-card__cat:first-child { margin-top: 20px; }
.col-card h3 {
  font-size: 16.5px; line-height: 1.6; letter-spacing: 0.02em;
  margin: 0 18px 10px; color: var(--navy); font-weight: 700;
}
.col-card__desc { font-size: 13.5px; line-height: 1.8; color: var(--col-muted); margin: 0 18px 14px; }
.col-card__meta {
  display: flex; gap: 14px; margin: 0 18px;
  font-size: 12px; letter-spacing: 0.04em; color: var(--col-muted);
}
.col-empty { font-size: 14px; color: var(--col-muted); }

/* ---------- 一覧ページ ---------- */
.col-hero { padding-bottom: clamp(60px, 9vh, 96px); }
.col-pillars__label, .col-othercat__label {
  font-family: var(--col-sans); font-size: 13px; font-weight: 700;
  letter-spacing: 0.12em; text-transform: none; color: var(--navy); margin: 0 0 18px;
}
.col-catsection__head {
  display: flex; align-items: baseline; justify-content: space-between; gap: 20px;
  padding-bottom: 12px; border-bottom: 2px solid var(--col-line); margin-bottom: 14px;
}
.col-catsection__head h2 { font-size: clamp(20px, 2.3vw, 24px); letter-spacing: 0.02em; margin: 0; color: var(--navy); }
.col-catsection__desc { font-size: 14px; line-height: 1.9; color: var(--col-muted); margin: 0 0 22px; max-width: 46em; }
.col-cathead { margin-bottom: clamp(28px, 4vh, 40px); }
.col-cathead h1 { font-size: clamp(25px, 3.2vw, 32px); font-weight: 800; line-height: 1.5; letter-spacing: 0.02em; margin: 0 0 16px; color: var(--navy); }
.col-cathead p { font-size: 14.5px; line-height: 1.95; color: var(--col-muted); margin: 0; max-width: 46em; }
.col-othercat { margin: clamp(48px, 7vh, 72px) 0 0; padding-top: 30px; border-top: 1px solid var(--col-line); display: flex; flex-direction: column; align-items: flex-start; gap: 14px; }

/* 著者ページ */
.col-authorprofile { display: grid; grid-template-columns: 1.1fr 1fr; gap: clamp(30px, 5vw, 60px); align-items: start; }
.col-authorprofile__text p { font-size: 15px; line-height: 2.05; color: var(--col-text); margin: 0 0 1.5em; }

/* ---------- 余白の締め ---------- */
.col-main { padding-bottom: clamp(80px, 12vh, 130px); }

/* ---------- レスポンシブ ---------- */
@media (max-width: 920px) {
  .col-authorprofile { grid-template-columns: 1fr; }
}
@media (max-width: 1023px) {
  .col-layout { grid-template-columns: 1fr; }
  .side-sticky { position: static; }
  .side-toc { display: none; }
  .col-side { border-top: 1px solid var(--col-line); padding-top: 32px; }
}
@media (max-width: 640px) {
  .col-row { grid-template-columns: 1fr; gap: 12px; }
}
@media (max-width: 720px) {
  .col-main { padding: 104px 20px 0; }
  .col-hero + .col-main { padding-top: 34px; }
  .col-body p, .col-body li { font-size: 15.5px; }
  .col-toc { padding: 20px 22px; }
  .col-cards { grid-template-columns: 1fr; }
  .col-catsection__head { flex-direction: column; align-items: flex-start; gap: 10px; }
  .col-video__play { width: 62px; height: 44px; }
  .col-cta { padding: 30px 22px; }
  .line-cta { padding: 16px 32px; }
}