/* 全站左上角「返回首页/返回板块」胶囊样式（与娱乐页 video-platform 风格统一） */
/* 单个链接直接挂 .home-back 即自带 fixed 定位；多个并排时用 .home-back-wrap 容器包裹，内部链接改为 static */
.home-back { position:fixed; left:20px; top:20px; z-index:100; text-decoration:none; color:#409eff; font-size:15px; background:#fff; padding:8px 16px; border-radius:20px; box-shadow:0 4px 14px rgba(64,158,255,0.15); transition:all .3s; }
.home-back:hover { transform:translateY(-2px); box-shadow:0 6px 18px rgba(64,158,255,0.25); }
.home-back-wrap { position:fixed; left:20px; top:20px; z-index:100; display:flex; gap:10px; }
.home-back-wrap .home-back { position:static; }
/* 暗色模式：胶囊改深紫半透明，避免白底在深色页面上刺眼（theme.js 给 html 加 .dark 后生效） */
html.dark .home-back { background: rgba(43,33,64,0.92); color: #b9a8e8; border: 1px solid rgba(255,255,255,0.12); box-shadow: 0 4px 14px rgba(0,0,0,0.4); }
html.dark .home-back:hover { background: rgba(58,46,88,0.95); color: #e8e2f8; box-shadow: 0 6px 18px rgba(0,0,0,0.5); }
/* 板块页顶栏「编写知识库」按钮（管理员可见） */
.back-home { display:inline-block; margin-top:20px; padding:8px 20px; background:#409eff; color:white; text-decoration:none; border-radius:6px; transition:.3s; }
.back-home:hover { background:#337ecc; }