*{margin:0;padding:0;box-sizing:border-box}
body{font-family:'Microsoft YaHei','Segoe UI',sans-serif;background:linear-gradient(135deg,#f5f7fa,#c3cfe2);min-height:100vh;padding:20px}
.container{max-width:1400px;margin:0 auto;background:#fff;border-radius:15px;box-shadow:0 10px 40px rgba(0,0,0,.1);overflow:hidden}
.header{background:linear-gradient(135deg,#1a3c6e,#2c5282);color:#fff;padding:22px 40px;text-align:center;border-bottom:4px solid #d4a853}
.header h1{font-size:28px;font-weight:700;letter-spacing:4px}
.header .subtitle{font-size:15px;margin-top:4px;opacity:.9}

.control-panel{padding:12px 25px;background:#f5f7fa;border-bottom:1px solid #e0e0e0}
.ctrl-row{display:flex;flex-wrap:wrap;gap:12px;align-items:center;margin-bottom:6px}
.ctrl-row:last-child{margin-bottom:0}
.control-item{display:flex;align-items:center;gap:5px}
.control-item label{font-weight:600;color:#333;font-size:14px;white-space:nowrap}
.control-item select{padding:5px 8px;font-size:14px;border:2px solid #ccc;border-radius:5px;background:#fff;cursor:pointer}
.control-item select:focus{outline:none;border-color:#1a3c6e}
.control-item input[type="range"]{width:110px;height:4px;border-radius:2px;background:#ddd;outline:none;-webkit-appearance:none}
.control-item input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:13px;height:13px;border-radius:50%;background:#d4a853;cursor:pointer}
.checkbox-label{cursor:pointer;font-size:14px;display:flex;align-items:center;gap:5px;font-weight:600;color:#333}
.checkbox-label input{width:15px;height:15px}

.main-row{display:flex;gap:15px;padding:15px 25px}
.left-panel{flex:0 0 48%;display:flex;flex-direction:column;gap:12px}
.right-panel{flex:1;display:flex;flex-direction:column;gap:12px}

.card{background:#f8f9fa;border-radius:10px;padding:16px}
.card h3{color:#1a3c6e;font-size:16px;margin-bottom:10px;padding-bottom:7px;border-bottom:2px solid #d4a853}

.recommend-card{border:2px solid #2563eb;box-shadow:0 4px 12px rgba(37,99,235,.15)}
.rec-header{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.rec-name{font-size:18px;font-weight:700;color:#1a3c6e}
.rec-badge{background:#2563eb;color:#fff;padding:2px 8px;border-radius:10px;font-size:11px}
.rec-grid{display:grid;grid-template-columns:1fr 1fr;gap:6px;font-size:13px}
.rec-item{background:#fff;padding:6px 10px;border-radius:5px}
.rec-item .rl{color:#666;font-size:12px}
.rec-item .rv{font-weight:600;color:#1a3c6e}

.alt-list{display:flex;flex-direction:column;gap:6px}
.alt-item{background:#fff;border:1px solid #e2e8f0;border-radius:6px;padding:8px 12px;cursor:pointer;transition:all .2s;font-size:13px}
.alt-item:hover{border-color:#2563eb;background:#f0f4ff}
.alt-item.active{border-color:#2563eb;background:#e8f0fe;font-weight:600}

.table-wrap{overflow-x:auto}
#compareTable{width:100%;border-collapse:collapse;font-size:12px}
#compareTable th{background:#1a3c6e;color:#fff;padding:8px;text-align:center}
#compareTable td{padding:6px 8px;border-bottom:1px solid #e8e8e8;text-align:center}
#compareTable tbody tr:nth-child(even){background:#f1f5f9}

#circuitCanvas{width:100%;height:auto;background:#fff;border-radius:6px;box-shadow:0 1px 4px rgba(0,0,0,.06)}

.bridge-row{display:flex;flex-wrap:wrap;gap:8px;margin-top:10px}
.bridge-item{flex:1;min-width:120px;background:#fff;padding:6px 8px;border-radius:5px;border:1px solid #e2e8f0}
.bridge-item label{font-size:12px;color:#555;display:block;margin-bottom:3px}
.bridge-item input[type="range"]{width:100%;height:3px}
.bridge-status{display:flex;align-items:center;gap:15px;margin-top:10px;font-size:14px}
.bridge-status strong{color:#1a3c6e}

.btn{padding:6px 14px;border:none;border-radius:6px;font-size:13px;font-weight:600;cursor:pointer;transition:all .2s;color:#fff;background:#1a3c6e}
.btn:hover{background:#2c5282}
.btn-sm{padding:4px 10px;font-size:12px}
.btn-auto{background:#059669}
.btn-auto:hover{background:#047857}

.knowledge-section{margin-bottom:12px}
.knowledge-section h4{color:#1a3c6e;font-size:14px;margin-bottom:6px}
.knowledge-section .formula{background:#fff;padding:8px 12px;border-radius:5px;border:1px solid #e2e8f0;margin-bottom:6px}
.knowledge-section p{font-size:13px;color:#555;line-height:1.6}
.knowledge-section ul{font-size:13px;color:#555;padding-left:18px;line-height:1.6}

.anim-card{margin:0 25px 15px}
.anim-header{display:flex;justify-content:space-between;align-items:center;cursor:pointer;user-select:none}
.anim-header h3{border-bottom:none;margin-bottom:0;padding-bottom:0}
.toggle-icon{font-size:14px;color:#666;transition:transform .3s}
.toggle-icon.collapsed{transform:rotate(-90deg)}
.anim-body{overflow:hidden;transition:max-height .3s ease}
.anim-body.collapsed{max-height:0!important;padding:0}
#animCanvas{width:100%;height:auto;background:#fff;border-radius:5px;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.anim-controls{display:flex;gap:8px;margin-top:8px;justify-content:center}

.footer{padding:16px 40px 20px;text-align:center}
.footer-divider{height:3px;background:linear-gradient(90deg,transparent,#1a3c6e 20%,#d4a853 50%,#1a3c6e 80%,transparent);margin-bottom:10px}
.footer-text{color:#1a3c6e;font-size:15px;font-weight:500;letter-spacing:4px}

@media(max-width:900px){
    .main-row{flex-direction:column}
    .ctrl-row{flex-direction:column;align-items:flex-start}
}