:root{--ink:#1c3031;--muted:#738183;--teal:#167166;--border:#e1e7e5;--bg:#f4f6f5}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"Noto Sans CJK SC","Microsoft YaHei",sans-serif;font-size:14px}button,input,select{font:inherit}button,a,select{touch-action:manipulation}button{cursor:pointer}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #66b8aa;outline-offset:3px}a{color:var(--teal);text-decoration:none}aside{width:235px;background:#fff;border-right:1px solid var(--border);position:fixed;inset:0 auto 0 0;padding:32px 18px;display:flex;flex-direction:column;overflow-y:auto}.brand{display:flex;gap:10px;align-items:center;color:var(--ink);font-size:19px;font-weight:700;margin:0 5px 42px}.brand-icon{display:grid;place-items:center;width:38px;height:38px;background:var(--teal);color:white;border-radius:11px;font-size:24px}.brand small{display:block;font-size:8px;letter-spacing:1.4px;color:var(--muted);margin-top:4px}.nav-label{font-size:11px;color:#8a9796;letter-spacing:1px;margin:20px 12px 12px}.nav{border:0;background:none;text-align:left;display:block;width:100%;padding:12px;border-radius:8px;color:#586969;margin-bottom:5px;font-size:13px}.nav span{float:right;font-size:11px}.nav:hover{background:#f4f7f6}.nav.active{color:var(--teal);background:#e9f3ef;font-weight:600}#formNav{max-height:47vh;overflow-y:auto}.side-bottom{margin-top:auto;padding:25px 9px 0;font-size:12px;color:#5c7471}.side-bottom small,.side-bottom a{display:block;font-size:10px;line-height:2;margin-top:7px}.status-dot{display:inline-block;width:6px;height:6px;background:#369b79;border-radius:50%;margin-right:5px}main{margin-left:235px;padding:0 34px 30px}header{height:82px;display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--border);font-size:12px}.muted{color:var(--muted)}.button{padding:9px 14px;border:1px solid var(--border);background:#fff;border-radius:7px;color:#425b58;font-size:12px}.button:hover{border-color:#6f9d93;background:#f0f8f5}.button:disabled{opacity:.4;cursor:default}.primary{background:var(--teal);color:white;border-color:var(--teal)}.hero{display:flex;justify-content:space-between;align-items:center;padding:36px 0 26px}.eyebrow{font-size:10px;letter-spacing:2px;color:#628c82}.hero h1{font-size:29px;letter-spacing:-1px;font-weight:600;margin:14px 0}.hero p{color:var(--muted);font-size:13px}.hero-mark{font-size:67px;color:#c1d5ce;font-weight:700;letter-spacing:-10px;padding-right:18px}.hero-mark span{font-size:40px;vertical-align:top}.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:15px;margin-bottom:34px}.stat{border:1px solid var(--border);background:#fff;padding:17px 21px;border-radius:10px;display:flex;align-items:center;gap:16px}.stat strong{font-size:28px;font-weight:550;letter-spacing:-1px}.stat span{font-size:11px;color:var(--muted);line-height:1.9}.section-title,.section-title>div{display:flex;align-items:center;gap:12px}.section-title{justify-content:space-between;margin-bottom:18px}.section-title h2{font-size:18px;margin:0}.section-title span{font-size:12px;color:var(--muted)}.view-toggle{padding:3px;border:1px solid var(--border);border-radius:7px;background:#eaf0ed;gap:0!important}.view-toggle button{border:0;background:none;color:#83928d;border-radius:5px;padding:7px 11px;font-size:11px}.view-toggle .selected{background:#fff;color:#335b51;box-shadow:0 1px 3px #0001}.filters{display:flex;gap:8px;flex-wrap:wrap;background:white;padding:12px;border:1px solid var(--border);border-radius:10px}.search{display:flex;align-items:center;gap:9px;flex:1 1 260px}.search span{font-size:24px;color:#738d85}.search input{border:0;outline:none;width:100%;font-size:12px;padding:8px 0;background:transparent}select{border:1px solid var(--border);border-radius:6px;background:white;color:#526a65;font-size:11px;padding:8px;max-width:160px}.quick{display:flex;align-items:center;gap:8px;margin:15px 0 23px;flex-wrap:wrap}.quick>span{color:#89958f;font-size:10px;margin-right:4px}.quick button{background:#eaf0ec;color:#678074;border:0;border-radius:4px;padding:5px 9px;font-size:10px}.quick button:hover{background:#d6e7df}.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.card{background:#fff;border:1px solid var(--border);border-radius:11px;overflow:hidden;transition:box-shadow .2s,border-color .2s}.card:hover{box-shadow:0 8px 20px #163c2810;border-color:#a9c7bb}.cover{position:relative;background:#eef1ef;height:194px;display:flex;align-items:center;justify-content:center}.cover>button[data-detail]{width:100%;height:100%;border:0;background:transparent;padding:0;overflow:hidden}.cover img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;transition:transform .25s}.card:hover .cover img{transform:scale(1.035)}.form-label{position:absolute;left:12px;top:12px;padding:5px 8px;font-size:9px;border-radius:4px;background:#ffffffed;color:#3f6158;pointer-events:none}.fav{position:absolute;right:10px;top:10px;width:29px;height:29px;border-radius:50%;background:#ffffffeb;border:0;font-size:19px;color:#778b80}.fav.on{color:#bc882f}.card-main{padding:17px}.company{font-size:10px;color:#7d8b84;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.model{display:block;background:none;border:0;color:var(--ink);font-size:18px;font-weight:600;line-height:1.3;margin:7px 0 9px;padding:0;text-align:left}.summary{font-size:11px;color:#7b8984;line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;height:40px;margin:0 0 15px}.card-meta{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #edf1ee;padding-top:12px;font-size:10px;color:#647f72;gap:8px}.card-meta span{white-space:nowrap;overflow:hidden;text-overflow:ellipsis;max-width:66%}.check{font-size:10px;color:#8a9791;display:flex;gap:4px;align-items:center;cursor:pointer}input[type=checkbox]{accent-color:var(--teal)}.pagination{display:flex;align-items:center;justify-content:center;gap:25px;margin:30px 0;font-size:12px;color:var(--muted)}footer{border-top:1px solid var(--border);padding-top:19px;color:#8b9891;font-size:10px;line-height:1.9}footer span{display:block}.table-wrap{overflow:auto;background:white;border:1px solid var(--border);border-radius:10px}table{border-collapse:collapse;width:100%;font-size:12px;text-align:left}th{background:#edf3ef;color:#647f72;font-size:11px;font-weight:500}td,th{padding:16px 13px;border-bottom:1px solid var(--border);vertical-align:top}td button{border:0;background:none;color:var(--teal);padding:0;text-align:left}.thumb{height:52px;width:52px;object-fit:contain}.empty{padding:80px;text-align:center;color:var(--muted);background:#fff;border:1px dashed #bccfc5;border-radius:10px}.empty strong{display:block;font-size:22px;color:var(--ink);margin-bottom:12px}#compareBar{position:fixed;bottom:20px;left:calc(235px + 50% - 117.5px);transform:translateX(-50%);z-index:5;min-width:570px;padding:13px 20px;background:#193d35;color:#fff;border-radius:12px;box-shadow:0 5px 30px #0003;align-items:center;justify-content:space-between;gap:30px;font-size:12px}#compareBar:not([hidden]){display:flex}dialog{border:1px solid var(--border);border-radius:15px;width:min(1000px,94vw);max-height:90vh;padding:35px;box-shadow:0 20px 80px #0003;color:var(--ink)}dialog::backdrop{background:#142c28aa;backdrop-filter:blur(4px)}.close{position:sticky;float:right;top:0;width:32px;height:32px;border:0;background:#edf3ef;border-radius:50%;font-size:24px;z-index:2;color:#526f62}.detail-top{display:grid;grid-template-columns:210px 1fr;gap:28px;margin-bottom:25px}.detail-top img{width:210px;height:210px;object-fit:contain;background:#f0f4f1;border-radius:12px}.detail-top h2{font-size:30px;margin:10px 0}.detail-top p{font-size:13px;line-height:1.9;color:#6b8176}.pills{display:flex;flex-wrap:wrap;gap:7px}.pill{font-size:10px;border-radius:4px;background:#eaf2ed;color:#557664;padding:5px 8px}.detail-links{display:flex;gap:10px;margin-top:15px;flex-wrap:wrap}.detail-grid{display:grid;grid-template-columns:repeat(4,1fr);background:#eff5f1;border-radius:9px;margin-bottom:28px}.detail-grid div{padding:15px;font-size:12px}.detail-grid small{display:block;color:#809387;font-size:10px;margin-bottom:7px}.detail-section{margin:27px 0}.detail-section h3{font-size:16px;border-left:3px solid var(--teal);padding-left:10px}.detail-section p{font-size:13px;line-height:2;color:#5e7568;white-space:pre-line}.detail-section td:nth-child(1){width:24%;color:#527461}.detail-section td:nth-child(2){width:29%}.detail-section td{line-height:1.7}.compare-table{overflow:auto}.compare-table td{min-width:200px;max-width:300px;line-height:1.8;white-space:pre-line}.compare-table td:first-child{min-width:130px;position:sticky;left:0;background:#f0f5f2}.compare-table img{height:115px;width:140px;object-fit:contain}.compare-table strong{display:block;font-size:17px}#toast{position:fixed;top:25px;left:50%;transform:translateX(-50%);z-index:20;background:#214e3d;color:white;padding:12px 22px;border-radius:8px;opacity:0;pointer-events:none;transition:opacity .2s}#toast.show{opacity:1}@media(min-width:1650px){.grid{grid-template-columns:repeat(4,minmax(0,1fr))}.cover{height:220px}}@media(max-width:1150px){aside{width:195px}main{margin-left:195px;padding:0 22px}.grid{grid-template-columns:repeat(2,minmax(0,1fr))}.stat{gap:9px;padding:14px}.hero h1{font-size:25px}#compareBar{left:calc(50% + 97.5px)}}@media(max-width:760px){aside{position:relative;width:100%;height:auto;padding:15px;border-right:0;border-bottom:1px solid var(--border)}.brand{margin:0 0 15px}.nav-label,#formNav,.side-bottom{display:none}.nav{display:inline-block;width:auto}.nav span{margin-left:10px}main{margin:0;padding:0 16px}header{height:64px}.hero{padding:25px 0 18px}.hero h1{font-size:23px}.hero-mark{display:none}.eyebrow{font-size:8px}.stats{grid-template-columns:repeat(2,1fr);gap:9px;margin-bottom:25px}.stat strong{font-size:24px}.grid{gap:12px}.cover{height:165px}.card-main{padding:12px}.model{font-size:16px}.card-meta{flex-wrap:wrap}.card-meta span{max-width:100%}.filters select{flex:1;max-width:100%;min-width:110px}.search{flex-basis:100%}.detail-top{grid-template-columns:1fr;gap:15px}.detail-top img{width:100%;height:170px}.detail-grid{grid-template-columns:repeat(2,1fr)}dialog{padding:20px}#compareBar{left:3%;transform:none;right:3%;min-width:0;gap:12px;font-size:10px}.button{padding:8px 10px}.empty{padding:55px 15px}}@media(max-width:400px){.grid{grid-template-columns:1fr}}

/* CATL identity */
.brand{flex-direction:column;align-items:flex-start;gap:17px;margin-bottom:30px}.catl-logo{display:block;width:156px;height:auto;max-height:49px;object-fit:contain;object-position:left center}.brand-title{display:block;padding-top:15px;border-top:1px solid var(--border);width:100%;font-size:18px}.brand-title small{font-size:8px;letter-spacing:1.4px}@media(max-width:760px){.brand{flex-direction:row;align-items:center;gap:18px;margin-bottom:15px}.catl-logo{width:133px;max-height:40px}.brand-title{border-top:0;border-left:1px solid var(--border);padding:0 0 0 18px;width:auto;font-size:17px}}

/* Two-level product categories */
#formNav{display:flex;flex-direction:column;gap:6px;flex:1;min-height:170px;max-height:none;overflow:visible}
.category-group{display:flex;flex-direction:column;min-height:0;flex:0 0 auto}
.category-group.expanded{flex:1}
.category-heading{display:flex;align-items:center;gap:3px;flex-shrink:0}
.category-heading .group-nav{flex:1;width:auto;margin:0;font-weight:600}
.category-toggle{border:0;background:transparent;color:#8ba497;border-radius:6px;width:28px;height:32px;font-size:19px;line-height:1;flex-shrink:0}
.category-toggle:hover{background:#edf4ef;color:var(--teal)}
.category-toggle[aria-expanded=false]{transform:rotate(-90deg)}
.category-children{margin:5px 0 6px 12px;padding-left:7px;border-left:1px solid var(--border);overflow-y:auto;min-height:0;scrollbar-width:thin}
.category-children[hidden]{display:none}
.category-children .form-nav{padding:9px 10px;font-size:12px;margin-bottom:3px}
@media(max-width:760px){#formNav{flex:none;max-height:250px;min-height:0;margin-top:7px}.category-children{max-height:155px}.category-children .form-nav{display:block;width:100%;text-align:left}.category-heading .group-nav{display:block;text-align:left}.category-heading .nav span,.category-children .nav span{margin-left:8px}}