.pcb-work{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:30px;padding:28px;background:#e6ebdc;border:1px solid #bdcbb1}.pcb-work svg,.signal-lab svg{width:100%;display:block}.pcb-work text,.signal-lab text{font:16px system-ui;fill:#244638;text-anchor:middle}.pcb-work .light{fill:#fff}.pcb-work aside{align-self:center}.pcb-work h3{font-size:28px;font-weight:500;margin:0 0 14px}.pcb-key{border-top:1px solid #b7c5a8;padding-top:18px;color:#5d7454}.pcb-stream{stroke:#b48b44;fill:none;stroke-width:4;stroke-dasharray:8 10;animation:pcb-current 2s linear infinite}.pcb-paused .pcb-stream,.pcb-offscreen .pcb-stream,.pcb-hidden .pcb-stream{animation-play-state:paused}[data-structure]{transition:opacity .3s}.pcb-work .tabs{margin:0 0 18px;gap:6px}.pcb-work .tabs button{padding:8px 12px}.signal-lab{background:#eeeee3;padding:26px}.signal-lab input{width:100%;accent-color:#244638;margin:20px 0}.pcb-concepts{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}.pcb-concepts h3{font-size:20px}.pcb-concepts p{font-size:14px}.pcb-process{padding:0;list-style:none;counter-reset:step}.pcb-process li{counter-increment:step;display:flex;gap:20px;padding:18px 0;border-bottom:1px solid #c6cfbb}.pcb-process li:before{content:counter(step,decimal-leading-zero);color:#75886a}.pcb-process b{min-width:130px}.pcb-process span{font-size:14px}details{padding:22px 0}summary{cursor:pointer}input:focus-visible,summary:focus-visible{outline:3px solid #ae8650;outline-offset:4px}@keyframes pcb-current{to{stroke-dashoffset:-72}}@media(max-width:720px){.pcb-work,.pcb-concepts{grid-template-columns:1fr}.pcb-work{padding:18px;gap:20px}.pcb-work h3{font-size:24px}.pcb-process li{flex-wrap:wrap;gap:8px}.pcb-process span{flex-basis:100%}.signal-lab{padding:16px}}@media(prefers-reduced-motion:reduce){.pcb-stream{animation:none}[data-structure]{transition:none}}

.board-detail{min-width:0}.board-detail svg{background:#edf0e4;border:1px solid #c4d0b8}.board-detail .control{margin-top:16px}#board-shape text{font-size:15px}@media(max-width:720px){#pcb-types .pcb-work{padding:16px}.board-detail{overflow:auto}.board-detail svg{min-width:450px}.board-detail:before{content:"左右滑動看完整板件 →";font-size:12px;display:block;margin-bottom:10px}}
