/* studio 布局（28 §三：画布为主体 + 一张引导卡；320px 手机画布+底部主操作） */
.studio-main { max-width: 1080px; margin: 0 auto; padding: 14px 16px 40px; }
.studio-head h1 { font-size: 26px; margin: 8px 0 4px; }
.studio-actions { display: flex; gap: 10px; flex-wrap: wrap; margin: 8px 0; }
.studio-limits { display: flex; gap: 8px; flex-wrap: wrap; margin: 6px 0 10px; }
.limit-chip { border: 1px solid var(--fs-border); border-radius: 999px; padding: 4px 12px; font-size: 13px; background: var(--fs-surface); }
.limit-chip.lock { border-color: #b3541e; color: #7a3a12; }
.studio-body { display: grid; grid-template-columns: minmax(0, 1.5fr) minmax(280px, 1fr); gap: 16px; align-items: start; }
.studio-canvas-wrap { background: var(--fs-surface); border: 1px solid var(--fs-border); border-radius: 16px; padding: 12px; }
#canvas { width: 100%; height: auto; display: block; border-radius: 10px; background: #faf9f6; touch-action: none; }
.variant-tabs { display: flex; gap: 8px; margin-bottom: 8px; }
.variant-tabs button { border: 1px solid var(--fs-border); background: var(--fs-surface); border-radius: 10px; padding: 6px 14px; cursor: pointer; font-size: 14px; }
.variant-tabs button.active { background: var(--fs-primary); color: var(--fs-on-primary); border-color: var(--fs-primary); }
.obj-bar { display: flex; gap: 8px; flex-wrap: wrap; margin-top: 10px; font-size: 13px; align-items: center; }
.obj-bar .obj-name { font-weight: 600; }
.obj-bar button { border: 1px solid var(--fs-border); background: var(--fs-surface); border-radius: 8px; padding: 4px 10px; cursor: pointer; }
.studio-side .card { margin: 0 0 14px; }
.prop-row { border: 1px solid var(--fs-border); border-radius: 12px; padding: 10px 12px; margin: 8px 0; }
.prop-row .prop-meta { font-size: 12.5px; color: var(--fs-text-secondary); }
.prop-actions { display: flex; gap: 8px; margin-top: 8px; }
.prop-actions .primary { border: 0; background: var(--fs-primary); color: var(--fs-on-primary); border-radius: 999px; padding: 7px 16px; cursor: pointer; font-weight: 600; }
.prop-actions .ghost { border: 1px solid var(--fs-border); background: var(--fs-surface); border-radius: 999px; padding: 7px 14px; cursor: pointer; }
button.primary, .btn-primary { border: 0; background: var(--fs-primary); color: var(--fs-on-primary); border-radius: 999px; padding: 9px 20px; cursor: pointer; font-weight: 600; font-size: 15px; }
button.ghost { border: 1px solid var(--fs-border); background: var(--fs-surface); border-radius: 999px; padding: 8px 16px; cursor: pointer; font-size: 14px; text-decoration: none; display: inline-block; }
.issue-hl { animation: pulse 1.2s ease-in-out 2; }
@keyframes pulse { 50% { opacity: 0.45; } }
.ghost-obj { opacity: 0.55; stroke-dasharray: 2 1.2; }
.furn { cursor: grab; }
.furn.locked { cursor: not-allowed; }
@media (max-width: 760px) {
  .studio-body { grid-template-columns: 1fr; }
  .studio-head h1 { font-size: 22px; }
  .studio-side { order: 2; }
}

/* 27 T08：首屏四问卡（四栏摘要，窄屏逐级堆叠） */
.fr-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 12px; }
.fr-item h3 { margin: 0; font-size: 12.5px; font-weight: 600; color: var(--fs-text-primary); }
.fr-item ul { margin: 4px 0 0; padding-left: 16px; font-size: 12.5px; line-height: 1.5; color: var(--fs-text-secondary); }
.fr-item p { font-size: 12.5px; line-height: 1.5; }
@media (max-width: 900px) { .fr-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .fr-grid { grid-template-columns: 1fr; } }