:root{--primary-light:#e6f0ff;--block-bg:#f8fafc;--border-light:#eaf2ff;--text-secondary:#64748b;--danger:#dc2626;--warning:#d97706;--success:#16a34a;--primary-dark:#1a5fcc}.container{gap:0 !important}.nav-wrapper,.sitemap-nav{margin-bottom:0 !important}.st-type-toggle{display:flex;gap:10px;margin-top:6px;flex-wrap:wrap}.st-type-opt{display:inline-flex;align-items:center;gap:6px;padding:7px 14px;border:1px solid var(--border-light,#e2e8f0);border-radius:0;background:#fff;cursor:pointer;font-size:14px;color:var(--text-secondary,#64748b);transition:all .15s}.st-type-opt input{accent-color:var(--primary,#2c80ff);margin:0}.st-type-opt:has(input:checked){border-color:var(--primary,#2c80ff);background:var(--light-blue,#eaf2ff);color:var(--primary,#2c80ff);font-weight:600}

/* 3D 预览区：纵向堆叠，视图切换按钮置于图例下方 */
#sketchWrap{display:flex!important;flex-direction:column!important;gap:12px!important;align-items:stretch!important}
#sketchWrap .sketch-title{order:0!important;font-size:15px;font-weight:600;color:#475569;margin:0}
#sketchWrap #viewer3d{order:1!important;width:100%!important;min-height:260px;background:#f1f5f9;border:1px solid var(--border-light,#e2e8f0)}
#sketchWrap .sketch-legend{order:2!important;display:flex!important;flex-wrap:wrap!important;gap:8px 18px!important;padding:8px 10px;background:#fff;border:1px solid var(--border-light,#e2e8f0)}
#sketchWrap .sketch-legend .leg-item{display:inline-flex!important;align-items:center;gap:6px;font-size:13px;color:var(--text-secondary,#64748b)}
#sketchWrap .sketch-legend .leg-color{width:14px;height:14px;display:inline-block;border-radius:0;border:1px solid rgba(0,0,0,.1)}
#sketchWrap .sketch-legend .st55{background:#3b82f6}/* 钢柱结构 */
#sketchWrap .sketch-legend .st56{background:#34d399}/* 广告面板 */
#sketchWrap .sketch-legend .st57{background:#4a5568}/* 独立基础 */
#sketchWrap .sketch-legend .st58{background:#8b5cf6}/* 短柱 */
#sketchWrap .st54{order:3!important;display:flex!important;flex-wrap:wrap!important;gap:8px!important;justify-content:center!important;width:100%!important;position:static!important;top:auto!important;right:auto!important;z-index:auto!important}
#sketchWrap .view-btn{padding:6px 16px;border:1px solid var(--border-light,#e2e8f0);background:#fff;color:var(--text-secondary,#64748b);border-radius:0;font-size:14px;cursor:pointer;transition:all .15s}
#sketchWrap .view-btn:hover{border-color:var(--primary,#2c80ff);color:var(--primary,#2c80ff)}