/* ---- Page-specific ---- */
    .period-bar {
      border-bottom: 1px solid var(--border);
      background: var(--bg);
      position: sticky;
      top: 64px;
      z-index: 90;
    }
    .period-bar__inner {
      max-width: var(--max-width);
      margin: 0 auto;
      padding: 16px var(--pad-pc);
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .period-bar__label {
      font-size: 10px;
      letter-spacing: .22em;
      color: var(--text-weakest);
      white-space: nowrap;
      flex-shrink: 0;
      margin-right: 4px;
    }
    .period-btn {
      flex-shrink: 0;
      font-size: 13px;
      font-weight: 400;
      letter-spacing: .12em;
      padding: 7px 16px;
      border: 1px solid var(--border);
      border-radius: var(--radius-pill);
      color: var(--text-sub);
      background: transparent;
      cursor: pointer;
      white-space: nowrap;
      transition: border-color .2s, color .2s, background .2s;
    }
    .period-btn:hover { border-color: var(--text-sub); color: var(--text); }
    .period-btn.active {
      background: var(--accent-warm);
      border-color: var(--accent-warm);
      color: #fff;
    }
    .rank-badge {
      position: absolute;
      top: 0;
      left: 0;
      width: 36px;
      height: 36px;
      background: var(--text);
      color: var(--bg);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      font-weight: 400;
      letter-spacing: .04em;
      z-index: 1;
    }
    .rank-badge--top { background: var(--accent-warm); }

    @media (max-width: 768px) {
      .cat-hero__inner { padding: 36px var(--pad-sp) 28px; flex-direction: column; align-items: flex-start; }
      .cat-hero__en { font-size: 59px; margin-bottom: -16px; }
      .cat-hero__ja { font-size: 27px; }
      .period-bar { top: 52px; }
      .period-bar__inner { padding: 12px var(--pad-sp); }
      .article-grid-wrap { padding: 0 var(--pad-sp); }
      .article-grid { grid-template-columns: repeat(2, 1fr); }
      .pagination { padding: 28px var(--pad-sp); }
    }

    @media (max-width: 480px) {
      .cat-hero__en { font-size: 44px; }
      .cat-hero__ja { font-size: 23px; }
      .article-grid { grid-template-columns: 1fr;
        gap: 12px; }
    }