/* ── 記事ページ共通スタイル ── */
.art-hero{position:relative;background:var(--ink);overflow:hidden;padding:140px 0 72px}
.art-hero canvas{position:absolute;inset:0;width:100%;height:100%;opacity:.4}
.art-hero-in{position:relative;z-index:1;max-width:800px}
.art-hero .back-link{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:12px;letter-spacing:.1em;color:rgba(255,255,255,.5);margin-bottom:28px;transition:color .2s}
.art-hero .back-link:hover{color:var(--cyan)}
.art-hero .back-link svg{transform:rotate(180deg)}
.art-meta{display:flex;align-items:center;gap:14px;margin-bottom:20px;flex-wrap:wrap}
.art-date{font-family:var(--mono);font-size:13px;color:rgba(255,255,255,.55);letter-spacing:.06em}
.art-cat{font-family:var(--mono);font-size:10px;letter-spacing:.1em;padding:3px 12px;border-radius:20px;border:1px solid}
.art-cat.cat-info{color:var(--cyan);border-color:rgba(60,207,230,.4)}
.art-cat.cat-press{color:#b8a4f5;border-color:rgba(184,164,245,.35)}
.art-cat.cat-event{color:#f5a87a;border-color:rgba(245,168,122,.35)}
.art-cat.cat-hr{color:#7ae3b0;border-color:rgba(122,227,176,.35)}
.art-hero h1{font-size:clamp(22px,3.2vw,38px);font-weight:900;color:#fff;line-height:1.5;letter-spacing:-.01em}

/* Article body */
.art-body{padding:72px 0 96px}
.art-body-inner{display:grid;grid-template-columns:1fr 300px;gap:72px;align-items:start;max-width:1100px;margin:0 auto}
.art-content{min-width:0}
.art-content p{font-size:15.5px;line-height:2.1;color:var(--muted)}
.art-content p+p{margin-top:22px}
.art-content a{color:var(--teal);text-decoration:underline;text-underline-offset:3px;word-break:break-all}
.art-content a:hover{color:var(--teal-d)}
.art-content .highlight{border-left:3px solid var(--teal);padding:18px 22px;background:var(--teal-50);border-radius:0 12px 12px 0;margin:28px 0;font-size:15px;line-height:2;color:var(--ink)}
.art-content .highlight strong{color:var(--teal-dd)}
.art-content .officials{margin:24px 0;padding:20px 24px;background:var(--bg-soft);border-radius:14px;border:1px solid var(--line)}
.art-content .officials h4{font-size:13px;font-weight:700;color:var(--teal-dd);margin-bottom:10px;font-family:var(--mono);letter-spacing:.06em;text-transform:uppercase}
.art-content .officials ul{list-style:none;display:flex;flex-direction:column;gap:8px}
.art-content .officials li{font-size:15px;color:var(--ink);display:flex;gap:12px}
.art-content .officials li::before{content:"▸";color:var(--teal);flex:none}
.art-content .ext-link{display:inline-flex;align-items:center;gap:10px;margin-top:24px;padding:14px 22px;border:1.5px solid var(--line);border-radius:12px;font-size:14px;color:var(--teal);background:#fff;transition:all .25s}
.art-content .ext-link:hover{border-color:var(--teal);box-shadow:0 6px 20px -10px rgba(0,151,178,.3);text-decoration:none;transform:translateY(-1px)}
.art-footer{margin-top:48px;padding-top:32px;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
.art-footer a.back{display:inline-flex;align-items:center;gap:10px;font-size:14px;font-weight:700;color:var(--teal)}

/* Sidebar */
.art-sidebar{position:sticky;top:calc(var(--hh) + 24px)}
.side-box{background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden}
.side-box-head{padding:18px 22px;background:var(--ink);color:#fff;font-family:var(--mono);font-size:11px;letter-spacing:.14em;text-transform:uppercase}
.side-news{display:flex;flex-direction:column}
.side-news a{display:grid;grid-template-columns:60px 1fr;gap:14px;padding:16px 20px;border-bottom:1px solid var(--line);transition:background .2s}
.side-news a:last-child{border-bottom:none}
.side-news a:hover{background:var(--teal-50)}
.side-news .s-date{font-family:var(--mono);font-size:11px;color:var(--muted);letter-spacing:.06em;white-space:nowrap;padding-top:2px}
.side-news .s-title{font-size:13px;color:var(--ink);line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}

@media(max-width:860px){
  .art-body-inner{grid-template-columns:1fr}
  .art-sidebar{position:static;top:auto}
}