.electrical-guide{min-width:0;margin:18px 0;padding:18px;border:1px solid var(--line);border-radius:10px;background:var(--white);scroll-margin-top:170px}
.electrical-guide h3{margin:0 0 10px;font-size:23px}.electrical-guide h4{margin:16px 0 10px;font-size:19px}
.electrical-guide p,.electrical-guide li,.guide-mode{font-size:calc(16px * var(--reading-scale));line-height:1.9;overflow-wrap:anywhere}
.guide-scope{color:var(--muted)}.guide-live-status,.guide-identity{padding:10px;background:var(--surface-tint);border-radius:6px}.guide-live-status.invalid{color:var(--orange)}
.guide-actions,.guide-progress{display:flex;flex-wrap:wrap;align-items:center;gap:10px;margin:16px 0}.guide-progress{justify-content:space-between;border-top:1px solid var(--line);padding-top:16px}.guide-progress .btn,.guide-actions .btn{white-space:normal}.guide-progress .btn:disabled,.guide-actions .btn:disabled{opacity:.6;cursor:default}.guide-chapter-heading{scroll-margin-top:180px}.guide-chapter-heading:focus{outline:2px solid var(--green);outline-offset:4px}.guide-measure-feedback{border-left:3px solid var(--green);padding:10px 14px;background:var(--surface-tint)}.lab-learning-link{font:inherit;font-size:15px;padding:0;color:var(--green);border:0;background:none;cursor:pointer;text-decoration:underline;text-underline-offset:3px}
.guide-tabs,.guide-links{display:flex;flex-wrap:wrap;gap:8px 12px;margin:16px 0}.guide-tabs .btn{white-space:normal;text-align:left}
:root .guide-tabs .btn.secondary[aria-pressed=true]{background:var(--green);color:var(--paper);border-color:var(--green)}
.guide-mode{display:block;width:100%;text-align:left;margin:8px 0;padding:10px 14px;background:var(--paper);color:var(--ink);border:1px solid var(--line);border-radius:6px;cursor:pointer}
.guide-mode.selected{border:2px solid var(--green);background:var(--surface-tint)}.guide-mode.selected:before{content:'当前：';font-weight:700;color:var(--green)}
.guide-table-scroll,.guide-diagram-scroll{max-width:100%;overflow:auto}.guide-table-scroll table{width:100%;min-width:620px;border-collapse:collapse;font-size:calc(15px * var(--reading-scale))}
.guide-table-scroll th,.guide-table-scroll td{padding:10px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
.guide-table-scroll button{background:transparent;color:var(--green);border:0;text-decoration:underline;text-underline-offset:3px;font:inherit;cursor:pointer}
.guide-rules{margin:16px 0;padding:12px;background:var(--surface-tint);border-radius:6px}.guide-rules summary{cursor:pointer;font-weight:700;line-height:1.8}
.guide-example-readings{display:grid;grid-template-columns:repeat(auto-fit,minmax(125px,1fr));gap:8px;margin:12px 0}.guide-example-readings>div{padding:10px;background:var(--surface-tint);border-radius:6px}.guide-example-readings strong{display:block;margin-top:4px;font-size:18px}
.guide-circuit{display:block;width:calc(100% * var(--diagram-zoom,1));min-width:calc(680px * var(--diagram-zoom,1));background:var(--paper);border-radius:8px}.guide-circuit text{fill:var(--ink);font:16px 'Microsoft YaHei',sans-serif}.guide-wires{stroke:var(--ink);fill:none;stroke-width:2}.guide-flow{stroke:var(--orange);stroke-width:3;stroke-dasharray:8 7;fill:none}
.electrical-guide [hidden]{display:none!important}.electrical-guide .guide-body{min-width:0}.electrical-guide .math-display{max-width:100%;overflow:auto}
.guide-readings{margin:16px 0;border:1px solid var(--line);border-radius:8px;padding:12px}.guide-readings>summary{cursor:pointer;font-weight:700;line-height:1.8;color:var(--green)}
.guide-step-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px;padding:0;list-style:none}.guide-step-grid>li{padding:14px;background:var(--surface-tint);border:1px solid var(--line);border-radius:8px;min-width:0}.guide-step-grid p{margin:6px 0 0}.guide-step-grid strong{color:var(--green)}
@media(max-width:1000px){.guide-step-grid{grid-template-columns:1fr}}
@media(max-width:700px){.electrical-guide{padding:12px}.guide-tabs .btn{flex:1 1 45%;font-size:14px}.guide-links a{display:block;max-width:100%}.guide-example-readings{grid-template-columns:repeat(2,minmax(0,1fr))}}