/* 2026-10-17 (Evie: settings need tidier storage) — the Appearance page is
   split into folding groups: 主题 / 字体 / 聊天 / 背景与玻璃 / 布局. Same cards
   and controls inside; only the grouping is new. */
details.settings-group{margin:0 0 6px}
details.settings-group>summary{
  list-style:none;display:flex;align-items:baseline;gap:10px;cursor:pointer;
  padding:14px 4px 12px;color:var(--text);
  font:500 15px var(--ui-font);letter-spacing:.04em;
  border-bottom:1px solid color-mix(in srgb,var(--text) 8%,transparent);
}
details.settings-group>summary::-webkit-details-marker{display:none}
details.settings-group>summary small{font:11px var(--ui-font);color:var(--textL);letter-spacing:.02em}
details.settings-group>summary i{margin-left:auto;font-style:normal;color:var(--textL);font-size:11px;transition:transform .2s}
details.settings-group[open]>summary{margin-bottom:12px}
details.settings-group[open]>summary i{transform:rotate(90deg)}