@charset "UTF-8";
:root{--bg:#f6f8fc;--paper:#fff;--ink:#1a273d;--muted:#6c778b;--blue:#4164e8;--blue-dark:#2d4bc5;--line:#e0e6f0;--light:#eaf0ff;--cyan:#319caa;--green:#25876c;--display:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;--body:"PingFang SC","Microsoft YaHei",sans-serif;--mono:"SFMono-Regular",Consolas,monospace}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.75 var(--body);-webkit-font-smoothing:antialiased}button,input,select{font:inherit}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:disabled{opacity:.4;cursor:not-allowed}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid #7c9aff;outline-offset:4px}button svg,a svg{flex-shrink:0}svg{display:block}button{border:0}p,h1,h2,h3,h4{margin:0}h1,h2,h3,h4{font-family:var(--display);line-height:1.4}::selection{background:#dce4ff}section{scroll-margin-top:96px}.wrap{width:min(1180px,calc(100% - 96px));margin:auto}.icon{width:20px;height:20px;display:inline-block;vertical-align:middle;fill:none;stroke:currentColor;stroke-width:1.6;stroke-linecap:round;stroke-linejoin:round}.skip-link{position:fixed;top:-80px;left:20px;background:var(--blue);color:white;padding:12px;z-index:100}.skip-link:focus{top:12px}
.site-header{background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:30;backdrop-filter:blur(16px)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:78px;gap:24px}.brand{display:flex;align-items:center;gap:11px;font-size:21px;font-weight:700;letter-spacing:.07em}.brand-mark{width:35px;height:35px;background:var(--blue);border-radius:11px;color:#fff;display:grid;place-items:center}.brand small{font:10px/1.4 var(--mono);display:block;letter-spacing:.13em;color:var(--muted)}.category-switch{display:flex;padding:4px;background:#f1f4fa;border-radius:10px;gap:3px}.category-switch a{padding:8px 22px;border-radius:7px;font-size:13px;display:flex;align-items:center;gap:9px;color:var(--muted)}.category-switch a[aria-current="page"]{color:var(--blue);background:var(--paper);box-shadow:0 2px 5px #283f6710;font-weight:600}.header-link{font-size:12px;color:var(--muted);display:flex;gap:7px;align-items:center}.header-link:hover{color:var(--blue)}
.edition{display:flex;justify-content:space-between;align-items:center;padding:20px 0 15px;border-bottom:1px solid var(--line);font-size:11px;color:var(--muted);letter-spacing:.06em}.edition b{font-weight:500;color:var(--ink)}.edition .mono{font:10px var(--mono);letter-spacing:.07em}.hero{position:relative;display:grid;grid-template-columns:1fr 1fr;gap:30px;padding:61px 0 48px;align-items:center;min-height:514px}.eyebrow{font:11px/1.5 var(--mono);letter-spacing:.1em;color:var(--blue);display:flex;align-items:center;gap:8px;margin-bottom:20px}.eyebrow:before{content:"";width:6px;height:6px;border-radius:50%;background:var(--blue)}.hero h1{font-size:61px;letter-spacing:-.05em;font-weight:650;line-height:1.3;margin-bottom:22px}.hero h1 span{color:var(--blue);position:relative;display:inline-block}.hero h1 span:after{content:"";position:absolute;left:0;bottom:0;width:100%;height:6px;background:#ccdaff;z-index:-1;transform:rotate(-1.3deg)}.hero-desc{max-width:440px;font-size:14px;line-height:1.95;color:var(--muted)}.hero-actions{display:flex;gap:12px;margin:27px 0 15px}.btn{display:inline-flex;align-items:center;justify-content:center;gap:13px;min-height:46px;padding:11px 21px;border-radius:8px;background:var(--paper);border:1px solid var(--line);font-size:13px;font-weight:500;transition:background .2s,transform .2s,box-shadow .2s}.btn:hover{background:#edf1fc;transform:translateY(-1px)}.btn-primary{background:var(--blue);color:#fff;border-color:var(--blue);box-shadow:0 5px 13px #4164e81a}.btn-primary:hover{background:var(--blue-dark)}.btn small{opacity:.7;font:10px var(--mono)}.hero-note{font-size:10px;letter-spacing:.04em;color:#7a8599;display:flex;align-items:center;gap:6px}.hero-note .icon{width:13px;height:13px}.hero-art{position:relative;min-width:0;isolation:isolate}.hero-art svg{width:100%;height:auto;overflow:visible}.hero-art:before{content:"";position:absolute;inset:7% 6%;border-radius:50%;background:radial-gradient(ellipse,#dfe7ff90,transparent 68%);z-index:-1}.diagram-label{font:11px var(--body);fill:#677a9e}.diagram-small{font:9px var(--mono);fill:#8092b6}.diagram-blue{stroke:#5273e2;fill:none;stroke-linecap:round;stroke-linejoin:round}.diagram-guide{stroke:#aabce8;stroke-width:.8;stroke-dasharray:3 5;fill:none}.hero-caption{font:9px var(--mono);color:#7a8eb9;letter-spacing:.12em;text-align:center;margin-top:-5px}.principle-rail{display:grid;grid-template-columns:repeat(4,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:20px 0;gap:20px}.rail-item{display:flex;align-items:center;gap:13px}.rail-number{font:12px var(--mono);color:#98a9c9}.rail-item strong{font-size:12px;font-weight:500;display:block}.rail-item p{font-size:10px;color:var(--muted)}.section-nav{display:flex;gap:29px;padding:20px 0 0;align-items:center}.section-nav a{font-size:12px;color:var(--muted);padding-bottom:9px;border-bottom:2px solid transparent}.section-nav a:hover,.section-nav a.active{color:var(--blue);border-color:var(--blue)}.section-nav .nav-tail{margin-left:auto;font:10px var(--mono);color:#91a0b9}
.section{padding:66px 0 0}.section-heading{display:flex;justify-content:space-between;gap:20px;align-items:end;margin-bottom:24px}.section-heading h2{font-size:27px;letter-spacing:-.04em;font-weight:650}.section-heading p{font-size:12px;color:var(--muted);margin-top:7px}.section-kicker{display:block;font:10px var(--mono);color:var(--blue);letter-spacing:.13em;margin-bottom:10px}.text-link{color:var(--blue);font-size:12px;display:inline-flex;align-items:center;gap:6px;background:none;padding:0;white-space:nowrap}.text-link:hover{text-decoration:underline}.text-link .icon{width:15px;height:15px}.quiz-layout{display:grid;grid-template-columns:minmax(0,1fr) 286px;gap:22px}.quiz-card{border:1px solid var(--line);background:white;border-radius:13px;overflow:hidden}.stepper{display:grid;grid-template-columns:repeat(5,1fr);padding:23px 27px 20px;border-bottom:1px solid var(--line);gap:8px}.step-button{font-size:11px;color:#8a96ac;display:flex;gap:7px;align-items:center;position:relative;background:none;text-align:left;padding:0}.step-button i{font:10px var(--mono);width:22px;height:22px;display:grid;place-items:center;border:1px solid var(--line);border-radius:50%;font-style:normal;background:white}.step-button.current{color:var(--blue);font-weight:600}.step-button.current i{background:var(--blue);border-color:var(--blue);color:white}.step-button.done{color:var(--blue)}.step-button.done i{background:var(--light);border-color:var(--light)}.quiz-body{padding:30px}.step-meta{font:10px var(--mono);letter-spacing:.06em;color:var(--blue);margin-bottom:9px}.quiz-body h3{font-size:23px;font-weight:600;margin-bottom:8px;letter-spacing:-.02em}.quiz-subtitle{font-size:12px;color:var(--muted);margin-bottom:23px}.options{display:grid;grid-template-columns:1fr 1fr;gap:12px}.option{position:relative;cursor:pointer;display:flex;align-items:center;gap:13px;padding:17px 15px;border:1px solid var(--line);border-radius:9px;transition:background .2s,border-color .2s;min-height:87px}.option:hover{border-color:#9bb0f0;background:#fafbff}.option:has(input:checked){background:#f1f5ff;border-color:var(--blue);box-shadow:inset 0 0 0 .5px var(--blue)}.option input{position:absolute;opacity:0;width:1px;height:1px}.option:has(input:focus-visible){outline:3px solid #7c9aff;outline-offset:3px}.option-icon{color:#7387b1;flex-shrink:0;width:32px;display:grid;place-items:center}.option-icon .icon{width:28px;height:28px}.option:has(input:checked) .option-icon{color:var(--blue)}.option-copy{flex:1;min-width:0}.option strong{display:block;font-size:13px;font-weight:500}.option small{display:block;color:var(--muted);font-size:10px;margin-top:2px;line-height:1.65}.option-check{width:15px;height:15px;border-radius:50%;border:1px solid #ced7e8;flex-shrink:0}.option:has(input:checked) .option-check{border:4px solid var(--blue)}.quiz-footer{display:flex;justify-content:space-between;align-items:center;gap:12px;border-top:1px solid #edf0f5;margin-top:26px;padding-top:19px}.quiz-footer .btn{min-height:39px;padding:8px 18px;font-size:11px}.quiz-footer .skip{font-size:11px;color:var(--muted);background:none;margin-left:auto}.quiz-footer .skip:hover{color:var(--blue)}.quiz-footer .icon{width:15px;height:15px}.quiz-aside{display:flex;flex-direction:column;gap:15px}.insight{background:var(--light);border:1px solid #dce5fa;border-radius:12px;padding:23px}.insight-top{display:flex;align-items:center;gap:8px;color:var(--blue);font-size:12px;font-weight:600;margin-bottom:16px}.insight-visual{height:105px;display:flex;align-items:center;justify-content:center;margin-bottom:16px}.insight-visual svg{width:180px;height:105px}.insight h4{font-size:14px;font-weight:550;margin-bottom:9px}.insight p{font-size:11px;color:#637494;line-height:1.9}.insight .micro{font-size:10px;color:#7c8bae;border-top:1px solid #d6e0f6;padding-top:13px;margin-top:16px}.summary-box{background:#fff;border:1px solid var(--line);border-radius:11px;padding:18px 21px}.summary-title{font-size:11px;display:flex;justify-content:space-between;align-items:center}.summary-title span{color:#8a98b0;font:9px var(--mono)}.summary-tags{display:flex;gap:6px;flex-wrap:wrap;margin-top:12px}.tag{font-size:10px;line-height:1.5;background:#f2f5fa;color:#6c7e9d;padding:5px 8px;border-radius:5px}.empty-summary{color:#96a0b3;font-size:10px;margin-top:9px}.measurement{background:#f7f9ff;border:1px solid var(--line);border-radius:10px;padding:22px}.range-head{display:flex;align-items:center;justify-content:space-between;font-size:12px;margin-bottom:14px}.range-value{font:26px var(--mono);color:var(--blue)}.range-value small{font-size:11px;color:#8795ad}.range-ends{display:flex;justify-content:space-between;font:10px var(--mono);color:#9ba7bb;margin-top:9px}input[type=range]{display:block;width:100%;accent-color:var(--blue);cursor:pointer;height:5px;margin:13px 0}.measurement p{font-size:11px;color:var(--muted);margin-top:20px}.number-row{display:flex;gap:15px;margin-top:20px;align-items:center;font-size:12px}.number-row input{width:90px;border:1px solid var(--line);padding:7px 10px;border-radius:6px;color:var(--blue);background:white}.number-row small{color:var(--muted);font-size:10px}
.result-view{padding:27px}.result-top{display:flex;justify-content:space-between;align-items:start;gap:15px}.result-top h3{font-size:23px;font-weight:600}.result-top p{font-size:12px;color:var(--muted);margin-top:6px}.result-spec{background:var(--light);border-radius:9px;padding:16px 18px;margin:20px 0;display:flex;align-items:center;gap:12px}.result-spec .icon{color:var(--blue);width:26px;height:26px;flex-shrink:0}.result-spec strong{font-size:14px;font-weight:550;color:var(--blue);display:block}.result-spec p{font-size:11px;color:#64779e}.result-list{display:flex;flex-direction:column;gap:11px}.result-item{border:1px solid var(--line);border-radius:9px;padding:16px;display:grid;grid-template-columns:66px 1fr;gap:17px;align-items:center}.result-item .mini-product{height:68px;background:#f4f7fc;border-radius:7px}.result-item h4{font-size:14px;font-weight:600;display:flex;justify-content:space-between;align-items:center;gap:12px}.result-item .match-count{font:10px var(--mono);color:var(--green);white-space:nowrap}.result-reasons{display:flex;flex-wrap:wrap;gap:7px;margin-top:6px}.result-reasons span{font-size:10px;color:var(--green)}.result-item .tradeoff{font-size:10px;color:var(--muted);margin:5px 0}.result-item .text-link{font-size:10px}.result-note{font-size:10px;line-height:1.9;color:#8390a6;margin-top:16px}.result-empty{background:#f5f7fc;border-radius:9px;padding:20px}.result-empty h4{font-size:15px;margin-bottom:7px}.result-empty p{font-size:12px;color:var(--muted)}
.lab-grid{display:grid;grid-template-columns:1.28fr 1fr;background:white;border:1px solid var(--line);border-radius:13px;overflow:hidden}.lab-demo{padding:30px;border-right:1px solid var(--line);background:linear-gradient(140deg,#fdfdff,#f1f5ff)}.lab-topline{display:flex;align-items:center;justify-content:space-between;font-size:11px;margin-bottom:21px}.lab-topline span{font:9px var(--mono);color:#9ba6ba}.segmented{display:flex;gap:5px;flex-wrap:wrap}.segmented button{background:transparent;font-size:11px;padding:7px 15px;border:1px solid var(--line);border-radius:6px;color:var(--muted)}.segmented button[aria-pressed="true"]{background:var(--blue);color:white;border-color:var(--blue)}.frequency-chart{width:100%;height:auto;margin-top:17px}.chart-axis{font:9px var(--mono);fill:#8f9eb9}.chart-grid{stroke:#dce4f4;stroke-width:.8}.chart-curve{fill:none;stroke:var(--blue);stroke-width:3;transition:d .4s}.chart-note{font-size:10px;color:#8c9ab2;margin-top:9px}.lab-copy{padding:33px 34px}.lab-copy h3{font-size:21px;letter-spacing:-.02em;margin-bottom:12px;font-weight:600}.lab-copy>p{font-size:12px;color:var(--muted);line-height:1.95}.principle-detail{display:flex;gap:12px;margin-top:22px;padding-top:20px;border-top:1px solid var(--line)}.principle-detail .icon{color:var(--blue);width:19px;margin-top:4px;flex-shrink:0}.principle-detail strong{font-size:12px;font-weight:500;display:block}.principle-detail p{font-size:11px;color:var(--muted);margin-top:5px;line-height:1.85}.lab-controls{display:grid;grid-template-columns:1fr 1fr;gap:13px;margin-top:18px}.select-group label{display:block;font-size:10px;color:var(--muted);margin-bottom:5px}.select-group select{border:1px solid var(--line);border-radius:6px;background:white;padding:8px 10px;width:100%;font-size:12px;color:var(--ink)}.lab-range{margin-top:18px}.lab-range label{font-size:11px;display:flex;justify-content:space-between}.lab-range output{font-family:var(--mono);color:var(--blue)}.lab-metrics{display:grid;grid-template-columns:repeat(3,1fr);margin:23px 0 16px}.lab-metrics>div{border-right:1px solid var(--line);padding-left:20px}.lab-metrics>div:first-child{padding-left:0}.lab-metrics>div:last-child{border:0}.lab-metrics strong{font:25px var(--mono);color:var(--blue)}.lab-metrics small{font-size:9px;color:#8b9bb7;margin-left:4px}.lab-metrics p{font-size:10px;color:var(--muted);margin-top:5px}.display-preview{height:150px;display:flex;align-items:center;justify-content:center;position:relative;margin:8px 0}.display-preview .screen-demo{height:110px;width:195px;border:5px solid #627bac;border-bottom-width:9px;border-radius:5px;background:linear-gradient(140deg,#d5e0fc,#f2f6ff);display:grid;place-items:center;position:relative;transition:width .3s,height .3s}.display-preview .screen-demo:after{content:"";position:absolute;width:5px;height:25px;top:100%;background:#627bac}.display-preview .screen-demo:before{content:"";position:absolute;width:65px;height:4px;top:calc(100% + 24px);background:#627bac;border-radius:3px}.screen-demo span{font:10px var(--mono);color:#657fb3}.display-preview .screen-width{position:absolute;bottom:-10px;color:#7e92b5;font:9px var(--mono)}
.catalog-toolbar{display:flex;justify-content:space-between;align-items:center;gap:20px;margin-bottom:21px}.filter-tabs{display:flex;gap:6px;flex-wrap:wrap}.filter-tabs button{font-size:11px;padding:7px 15px;background:transparent;color:var(--muted);border:1px solid transparent;border-radius:6px}.filter-tabs button[aria-pressed="true"]{background:#e8edfb;border-color:#dce3f6;color:var(--blue)}.search-box{display:flex;align-items:center;gap:8px;background:white;border:1px solid var(--line);border-radius:7px;padding:7px 11px;width:210px}.search-box .icon{width:15px;height:15px;color:#98a5bb}.search-box input{border:0;background:none;width:100%;outline:none;font-size:11px;min-width:0;color:var(--ink)}.catalog-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.product-card{background:white;border:1px solid var(--line);border-radius:11px;overflow:hidden;transition:transform .2s,box-shadow .2s}.product-card:hover{transform:translateY(-3px);box-shadow:0 10px 26px #273c6010}.product-image{height:184px;display:grid;place-items:center;background:#fff;position:relative;margin:9px 9px 0;border-radius:7px;overflow:hidden}.product-badge{position:absolute;top:12px;left:12px;font-size:9px;background:#ffffffcf;color:#7687a6;padding:3px 7px;border-radius:4px;z-index:2}.favorite-btn{position:absolute;right:9px;top:9px;background:#ffffffbd;color:#8c9bb4;border-radius:50%;width:29px;height:29px;display:grid;place-items:center;z-index:2}.favorite-btn .icon{width:15px;height:15px}.favorite-btn[aria-pressed="true"]{color:var(--blue);background:#e5ecff}.favorite-btn[aria-pressed="true"] .icon{fill:#c5d3ff}.product-copy{padding:17px 19px 18px}.product-brand{font:9px var(--mono);color:#8c9ab2;letter-spacing:.08em;margin-bottom:5px}.product-copy h3{font-size:17px;font-weight:600;letter-spacing:-.02em}.product-specs{display:flex;gap:6px;flex-wrap:wrap;margin-top:10px}.product-specs span{font-size:10px;background:#f4f6fa;color:#6e7e97;border-radius:4px;padding:3px 6px}.product-description{font-size:11px;color:var(--muted);margin-top:12px;line-height:1.8;min-height:40px}.product-bottom{display:flex;justify-content:space-between;align-items:center;border-top:1px solid #eef1f6;padding-top:13px;margin-top:14px;gap:12px}.product-bottom .text-link{font-size:10px}.compare-btn{font-size:10px;color:var(--muted);background:none;display:flex;align-items:center;gap:5px;padding:0}.compare-btn[aria-pressed="true"]{color:var(--blue)}.compare-btn .icon{width:13px;height:13px}.no-products{padding:36px;background:white;border:1px dashed var(--line);border-radius:10px;grid-column:1/-1;text-align:center;font-size:13px;color:var(--muted)}.catalog-footnote{font-size:10px;color:#8b97aa;margin-top:17px;line-height:1.8}
.guide-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.guide-card{background:white;border:1px solid var(--line);border-radius:10px;padding:23px;cursor:pointer;text-align:left;transition:background .2s}.guide-card:hover{background:#f0f4ff}.guide-topic{display:flex;align-items:center;gap:9px;font-size:10px;color:var(--blue);margin-bottom:20px}.guide-topic .icon{width:18px;height:18px}.guide-card h3{font-size:17px;font-weight:550;letter-spacing:-.02em;margin-bottom:10px}.guide-card p{font-size:11px;color:var(--muted);line-height:1.9}.guide-card .read-more{display:flex;align-items:center;justify-content:space-between;margin-top:24px;font-size:10px;color:#8c99af}.guide-card .read-more .icon{width:16px;height:16px;color:var(--blue)}.logic-section{margin:55px 0 60px;padding:28px 31px;border:1px solid #dce4f5;background:#ecf1fc;border-radius:11px;display:grid;grid-template-columns:1fr 1.7fr;gap:40px;align-items:center}.logic-section h2{font-size:21px;letter-spacing:-.03em;font-weight:600;margin-bottom:7px}.logic-section>div>p{font-size:11px;color:var(--muted)}.logic-section details{font-size:11px}.logic-section summary{cursor:pointer;color:var(--blue);padding:7px 0}.logic-section details p{color:#6d7f9e;line-height:1.95;margin-top:8px}.site-footer{border-top:1px solid var(--line);padding:29px 0 26px;background:#f0f3f9}.footer-top{display:flex;justify-content:space-between;align-items:center;gap:20px}.footer-brand{font-size:14px;font-weight:600;display:flex;align-items:center;gap:9px}.footer-brand .brand-mark{width:25px;height:25px;border-radius:7px}.footer-brand .icon{width:16px;height:16px}.footer-top p{font-size:10px;color:var(--muted)}.footer-bottom{display:flex;justify-content:space-between;font-size:9px;color:#8e9bb0;margin-top:20px;padding-top:17px;border-top:1px solid var(--line);gap:20px}.footer-bottom a{color:#6e83b6}.footer-bottom a:hover{text-decoration:underline}.footer-bottom span:last-child{font-family:var(--mono);font-size:8px;letter-spacing:.06em}
.compare-bar{position:fixed;bottom:23px;left:50%;transform:translateX(-50%);z-index:40;width:min(760px,calc(100% - 32px));display:flex;align-items:center;gap:15px;background:#20324d;color:white;box-shadow:0 8px 35px #172a4533;border:1px solid #3d5170;border-radius:11px;padding:13px 19px}.compare-bar[hidden]{display:none}.compare-bar p{font-size:11px;flex:1}.compare-bar small{font-size:9px;color:#b1c0da;display:block}.compare-bar .btn{background:var(--blue);border-color:var(--blue);color:white;min-height:35px;font-size:11px;padding:7px 15px}.compare-clear{background:none;color:#b2c1d9;font-size:11px;padding:5px}.modal{position:fixed;inset:0;z-index:80;background:#1b2c4c66;backdrop-filter:blur(6px);padding:30px;display:flex;align-items:center;justify-content:center}.modal[hidden]{display:none}.modal-panel{background:white;border-radius:15px;width:min(900px,100%);max-height:86vh;overflow:auto;box-shadow:0 30px 90px #1b2c4c33}.modal-head{display:flex;align-items:center;justify-content:space-between;padding:24px 28px;border-bottom:1px solid var(--line);gap:20px}.modal-head h2{font-size:21px}.close-modal{width:31px;height:31px;display:grid;place-items:center;background:#f3f6fb;border-radius:50%}.modal-body{padding:26px 28px}.article-content{max-width:620px}.article-content p{font-size:13px;color:var(--muted);line-height:2;margin-bottom:17px}.article-content h3{font-size:17px;margin:24px 0 11px}.article-content .source{font-size:11px;border-top:1px solid var(--line);padding-top:18px}.article-content a{color:var(--blue);text-decoration:underline}.table-scroll{overflow-x:auto}table{border-collapse:collapse;width:100%;font-size:12px;min-width:510px}th,td{border-bottom:1px solid var(--line);padding:16px 14px;text-align:left;vertical-align:top}th{font-weight:600;background:#f5f7fc;font-size:12px}td:first-child{color:var(--muted);width:110px}td .text-link{font-size:11px}.toast{position:fixed;top:96px;left:50%;transform:translateX(-50%);background:#243651;color:white;font-size:12px;z-index:100;border-radius:8px;padding:10px 20px;box-shadow:0 5px 20px #0002}.toast[hidden]{display:none}.fade-in{animation:fade-in .45s ease-out both}@keyframes fade-in{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1500px){.hero{padding-top:75px;padding-bottom:60px;min-height:570px}.hero h1{font-size:68px}.wrap{width:min(1240px,calc(100% - 120px))}}
@media(max-width:1050px){.wrap{width:calc(100% - 60px)}.hero h1{font-size:51px}.hero{gap:10px;min-height:470px}.quiz-layout{grid-template-columns:minmax(0,1fr) 245px;gap:16px}.quiz-body{padding:24px}.stepper{padding:20px}.step-button{font-size:10px;gap:5px}.option{padding:14px 11px;gap:8px}.option-icon{width:26px}.option-icon .icon{width:24px}.lab-copy{padding:27px}.lab-demo{padding:25px}.product-image{height:160px}.header-link{font-size:11px}}
@media(max-width:800px){.wrap{width:calc(100% - 40px)}.header-inner{height:71px;gap:12px}.brand{font-size:18px;gap:8px}.brand-mark{width:31px;height:31px}.brand small{font-size:8px}.category-switch a{padding:7px 12px;font-size:11px;gap:6px}.header-link{display:none}.hero{grid-template-columns:1.05fr 1fr;padding:46px 0 40px}.hero h1{font-size:39px}.hero-desc{font-size:12px}.eyebrow{font-size:9px}.hero-actions{gap:8px}.hero-actions .btn{font-size:11px;padding:10px 14px;gap:8px}.hero-actions .btn small{display:none}.hero-note{font-size:8px}.hero-caption{font-size:7px}.principle-rail{gap:10px}.rail-item{gap:8px}.rail-item strong{font-size:11px}.rail-item p{font-size:9px}.quiz-layout{grid-template-columns:1fr}.quiz-aside{display:grid;grid-template-columns:1fr 1fr;align-items:stretch}.insight{padding:19px}.insight-visual{display:none}.insight-top{margin-bottom:10px}.insight .micro{margin-top:12px;padding-top:10px}.summary-box{padding:20px}.summary-tags{gap:8px}.lab-grid{grid-template-columns:1fr 1fr}.lab-copy{padding:25px}.lab-copy h3{font-size:19px}.lab-demo{padding:24px}.lab-topline span{display:none}.catalog-grid{gap:12px}.product-image{height:142px}.product-copy{padding:15px 13px}.product-copy h3{font-size:14px}.product-specs span{font-size:9px}.product-description{font-size:10px}.product-bottom{gap:4px}.product-bottom .text-link,.compare-btn{font-size:9px}.guide-grid{gap:12px}.guide-card{padding:20px}.guide-card h3{font-size:15px}.logic-section{grid-template-columns:1fr 1.3fr;gap:25px;padding:25px}.logic-section h2{font-size:19px}.section-nav{gap:22px}.section-nav a{font-size:11px}.section-nav .nav-tail{display:none}.edition{font-size:10px}.edition .mono{font-size:8px}.lab-metrics>div{padding-left:10px}.lab-metrics strong{font-size:22px}.lab-controls{gap:9px}.lab-controls select{font-size:10px;padding:8px 6px}}
@media(max-width:600px){.wrap{width:calc(100% - 36px)}html{scroll-padding-top:84px}.header-inner{height:66px}.brand{font-size:16px}.brand small{font-size:7px}.brand-mark{width:28px;height:28px;border-radius:8px}.brand-mark .icon{width:18px}.category-switch{padding:3px}.category-switch a{font-size:10px;padding:7px 10px;gap:5px}.category-switch .icon{width:15px;height:15px}.edition{padding:17px 0 12px;font-size:9px;gap:12px}.edition .mono{display:none}.hero{display:flex;flex-direction:column;padding:37px 0 24px;gap:15px;align-items:stretch}.hero h1{font-size:43px;line-height:1.3;margin-bottom:17px}.hero-desc{font-size:12px;max-width:340px}.hero-art{width:min(100%,400px);align-self:center;margin-top:-5px}.hero-art svg{max-height:265px}.hero-caption{font-size:8px;margin-top:-8px}.hero-actions{margin:22px 0 12px}.hero-actions .btn{font-size:12px;padding:10px 18px;min-height:43px}.hero-actions .btn small{display:inline;font-size:8px}.hero-note{font-size:9px}.eyebrow{margin-bottom:15px}.principle-rail{grid-template-columns:1fr 1fr;gap:17px 14px;padding:18px 0}.rail-item strong{font-size:11px}.rail-item p{font-size:9px}.rail-number{font-size:11px}.section-nav{gap:0;justify-content:space-between;padding-top:16px}.section-nav a{font-size:10px}.section{padding-top:43px}.section-heading{margin-bottom:19px;gap:12px;align-items:end}.section-heading h2{font-size:23px}.section-heading p{font-size:11px;max-width:260px}.section-heading>.text-link{font-size:10px}.section-kicker{font-size:9px;margin-bottom:8px}.stepper{padding:18px 16px;gap:3px}.step-button{font-size:9px;gap:4px;justify-content:center;flex-direction:column}.step-button i{width:21px;height:21px;font-size:9px}.quiz-body{padding:23px 19px}.quiz-body h3{font-size:20px}.quiz-subtitle{font-size:11px}.options{gap:9px}.option{min-height:101px;padding:14px 11px;gap:9px;align-items:flex-start}.option-icon{display:none}.option strong{font-size:12px}.option small{font-size:10px;margin-top:5px}.option-check{margin-top:4px;width:13px;height:13px}.quiz-footer{gap:6px}.quiz-footer .btn{padding:8px 12px;font-size:10px;gap:6px}.quiz-footer .skip{font-size:10px}.quiz-aside{grid-template-columns:1fr;gap:10px}.insight{padding:18px 21px}.insight h4{font-size:13px}.insight p{font-size:11px}.insight .micro{display:none}.summary-box{padding:15px 20px}.summary-tags{margin-top:10px;gap:5px}.tag{font-size:9px;padding:4px 7px}.empty-summary{margin-top:4px}.lab-grid{grid-template-columns:1fr}.lab-demo{border-right:0;border-bottom:1px solid var(--line);padding:23px}.lab-copy{padding:26px}.lab-copy h3{font-size:20px}.lab-copy>p{font-size:12px}.principle-detail{margin-top:18px;padding-top:17px}.lab-topline span{display:inline;font-size:8px}.frequency-chart{margin-top:11px}.catalog-toolbar{flex-direction:column;gap:14px;align-items:stretch}.filter-tabs{gap:4px}.filter-tabs button{font-size:10px;padding:6px 10px}.search-box{width:100%}.catalog-grid{grid-template-columns:1fr 1fr;gap:11px}.product-image{height:137px;margin:7px 7px 0}.product-badge{font-size:8px;top:9px;left:8px;padding:2px 5px}.favorite-btn{width:25px;height:25px;right:7px;top:7px}.favorite-btn .icon{width:13px;height:13px}.product-copy{padding:13px 12px}.product-brand{font-size:8px;letter-spacing:.01em}.product-copy h3{font-size:14px}.product-specs{gap:4px}.product-specs span{font-size:8px;padding:3px 5px}.product-description{font-size:10px;min-height:54px;margin-top:9px}.product-bottom{flex-direction:column;align-items:start;gap:9px;margin-top:10px;padding-top:11px}.product-bottom .text-link,.compare-btn{font-size:10px}.guide-grid{grid-template-columns:1fr;gap:11px}.guide-card{padding:21px}.guide-topic{margin-bottom:12px;font-size:10px}.guide-card h3{font-size:17px}.guide-card p{font-size:11px}.guide-card .read-more{margin-top:15px}.logic-section{grid-template-columns:1fr;gap:14px;margin:36px 0 42px;padding:22px}.logic-section h2{font-size:20px}.footer-top{align-items:start;flex-direction:column;gap:11px}.footer-bottom{flex-direction:column;gap:11px}.footer-bottom span:last-child{font-size:8px}.site-footer{padding:24px 0}.result-view{padding:23px 18px}.result-top h3{font-size:20px}.result-item{grid-template-columns:48px 1fr;padding:13px 11px;gap:11px}.result-item .mini-product{height:56px}.result-item h4{font-size:12px;gap:5px;flex-wrap:wrap}.result-item .match-count{font-size:8px}.result-spec{padding:14px}.result-spec strong{font-size:12px}.result-spec p{font-size:10px}.compare-bar{padding:11px 13px;gap:10px;bottom:14px}.compare-bar p{font-size:10px}.compare-bar small{font-size:8px}.compare-bar .btn{font-size:10px;padding:6px 11px;gap:6px}.compare-clear{font-size:10px}.modal{padding:16px}.modal-head{padding:19px 20px}.modal-head h2{font-size:18px}.modal-body{padding:20px}.measurement{padding:18px}.number-row{gap:9px;flex-wrap:wrap}.lab-metrics strong{font-size:27px}.lab-controls select{font-size:12px}}
@media(max-width:360px){.hero-actions .btn{white-space:nowrap;min-height:43px;padding:10px 12px;font-size:10px;gap:7px}.hero-actions .btn small{display:none}.category-switch a{white-space:nowrap;font-size:9px;padding:7px 8px}.category-switch .icon{width:13px;height:13px}.brand small{white-space:nowrap;font-size:6px;letter-spacing:.08em}.header-inner{gap:8px}.brand{gap:7px}.section-heading{display:block}.section-heading>.text-link{margin-top:11px}.product-card{min-width:0}.product-copy h3{overflow-wrap:anywhere}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}

/* Official product photographs: contain the whole product, without recoloring. */
.product-photo{display:block;object-fit:contain;max-width:100%;height:auto}
.product-image>.product-photo{width:100%;height:100%;padding:32px 25px 12px;min-height:0;z-index:1}
.product-image>.product-photo[data-product-id="lg27gp850"]{transform:scale(1.3)}
.mini-product{display:flex;align-items:center;justify-content:center;overflow:hidden;background:#fff;border-radius:7px}
.mini-product .product-photo{width:100%;height:100%;max-height:160px;object-fit:contain;padding:4px}
.result-item .mini-product{background:#fff}
.product-detail-intro{display:grid;grid-template-columns:130px 1fr;gap:22px;align-items:center;margin-bottom:22px}
.product-detail-intro .mini-product{height:135px}
.hero-photo-board{background:#fff;border:1px solid #e2e8f4;border-radius:15px;padding:20px 24px 17px;box-shadow:0 16px 48px #304c8b06}
.hero-photo-label{display:flex;align-items:center;justify-content:space-between;gap:12px;color:#8795b0;font:9px var(--mono);letter-spacing:.08em}
.hero-photo-label span:last-child{font:10px var(--body);letter-spacing:0;color:#6c7e9f}
.hero-photo-stage{height:307px;display:flex;align-items:center;justify-content:center;padding:12px 25px}
.hero-photo-stage .product-photo{height:100%;width:100%;object-fit:contain}
.hero-photo-meta{display:flex;justify-content:space-between;align-items:end;gap:12px;border-top:1px solid #eef1f7;padding-top:12px}
.hero-photo-meta .product-brand{display:block;margin-bottom:4px}
.hero-photo-meta strong{display:block;font-size:14px;font-weight:550}
.hero-photo-meta a{display:inline-flex;align-items:center;gap:5px;color:var(--blue);font-size:10px;white-space:nowrap}
.hero-photo-meta .icon{width:12px;height:12px}
.hero-caption{margin-top:13px}
.result-note a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
@media(max-width:1050px){.hero-photo-board{padding:17px 19px 14px}.hero-photo-stage{height:270px;padding:12px 15px}.product-image>.product-photo{padding:30px 17px 10px}}
@media(max-width:800px){.hero-photo-board{padding:15px}.hero-photo-label{font-size:7px}.hero-photo-label span:last-child{font-size:8px}.hero-photo-stage{height:230px;padding:12px 7px}.hero-photo-meta strong{font-size:12px}.hero-photo-meta a{font-size:9px}.product-image>.product-photo{padding:29px 12px 9px}}
@media(max-width:600px){.hero-photo-stage{height:220px;padding:9px 18px}.hero-photo-board{border-radius:12px;padding:16px 19px}.hero-photo-label{font-size:8px}.hero-photo-label span:last-child{font-size:9px}.hero-caption{margin-top:11px}.hero-photo-meta strong{font-size:13px}.hero-photo-meta a{font-size:10px}.product-image>.product-photo{padding:27px 10px 8px}.product-detail-intro{grid-template-columns:100px 1fr;gap:15px}.product-detail-intro .mini-product{height:110px}}
/* Reading pages retain the laboratory's blue, ink and quiet spacing. */
.footer-links{display:flex;flex-wrap:wrap;gap:11px 23px;padding:16px 0 20px;font-size:11px;color:var(--muted)}
.footer-links a:hover{color:var(--blue)}
.noscript-note{padding:14px 18px;margin-top:18px;border:1px solid var(--line);border-radius:8px;font-size:12px;color:var(--muted)}
.portal-hero{padding:70px 0 40px;max-width:760px}
.portal-hero h1{font-size:51px;line-height:1.4;letter-spacing:-.045em;font-weight:650;margin-bottom:20px}
.portal-hero h1 span{color:var(--blue)}
.portal-hero>p:last-child{color:var(--muted);font-size:14px;line-height:1.9}
.portal-grid{display:grid;grid-template-columns:1fr 1fr;gap:23px}
.portal-category{display:grid;grid-template-columns:42% 1fr;background:#fff;border:1px solid var(--line);border-radius:14px;overflow:hidden;align-items:center;transition:border-color .2s,transform .2s}
.portal-category:hover{border-color:#b2c1f0;transform:translateY(-2px)}
.portal-photo{height:240px;padding:27px 10px 27px 20px;display:flex;align-items:center;justify-content:center}
.portal-photo .product-photo{width:100%;height:100%;object-fit:contain}
.portal-copy{padding:28px 25px 27px 15px}
.portal-copy h2{font-size:23px;letter-spacing:-.035em;font-weight:600;margin-bottom:11px}
.portal-copy p{font-size:12px;line-height:1.85;color:var(--muted);margin-bottom:18px}
.portal-copy small{display:block;font-size:8px;color:#8a97ac;margin-top:14px;line-height:1.7}
.portal-notes{padding-top:57px}
.portal-method{display:grid;grid-template-columns:240px 1fr;align-items:start;gap:20px 35px;border-top:1px solid var(--line);padding:32px 0 45px;margin-top:44px}
.portal-method h2{font-size:23px;letter-spacing:-.035em;font-weight:600}
.portal-method p{font-size:13px;line-height:1.9;color:var(--muted)}
.portal-method .text-link{grid-column:2}
.guide-card{display:block}
.guide-index{padding-bottom:65px}
.reading-wrap{max-width:820px;padding-bottom:65px}
.breadcrumb{display:flex;gap:9px;flex-wrap:wrap;margin-top:27px;color:#8c98ac;font-size:11px}
.breadcrumb a:hover{color:var(--blue)}
.reading-header{padding:43px 0 28px;border-bottom:1px solid var(--line);margin-bottom:32px}
.reading-header h1{font-size:37px;font-weight:650;letter-spacing:-.04em;line-height:1.5;margin-bottom:17px}
.reading-header>p:not(.eyebrow){color:var(--muted);font-size:14px;line-height:1.9}
.article-meta{color:#8a97ac;font-size:11px;line-height:1.8;margin-top:15px}
.longform{font-size:14px;line-height:2;color:#52617a}
.longform h2{font-size:21px;line-height:1.6;letter-spacing:-.02em;color:var(--ink);font-weight:600;margin:35px 0 13px}
.longform p{font-size:14px;line-height:2;margin:0 0 19px}
.longform .article-lead{font-size:17px;line-height:1.95;color:var(--ink);margin-bottom:29px}
.longform ol,.longform ul{padding-left:24px;margin:10px 0 22px;list-style:revert}
.longform li{margin-bottom:9px;padding-left:3px}
.longform a{color:var(--blue);text-decoration:underline;text-underline-offset:3px}
.longform .btn{text-decoration:none}
.longform table{min-width:520px;width:100%;font-size:12px}
.longform th,.longform td{line-height:1.8;vertical-align:top;padding:13px 15px}
.longform .table-scroll{border:1px solid var(--line);border-radius:8px;margin:23px 0 28px;background:#fff}
.longform .source{font-size:11px;line-height:1.9;margin-top:28px;border-top:1px solid var(--line);padding-top:17px;color:#8491a7}
.article-next{display:flex;justify-content:space-between;align-items:center;gap:20px;padding:24px;background:#edf1fc;border:1px solid #e1e7f5;border-radius:10px;margin-top:36px}
.article-next p{font-size:13px;color:#637497}
.article-next .btn{white-space:nowrap}
.related-heading{font-size:21px;font-weight:600;margin-bottom:20px}
.related-guides{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.privacy-status{color:var(--green);font-size:12px!important;min-height:20px;margin-top:10px!important}
.ad-placement{margin:35px 0 0;padding:12px 0;border-top:1px solid var(--line);min-height:120px;overflow:hidden}
.ad-placement>span{display:block;text-align:center;font-size:10px;color:var(--muted);margin-bottom:10px}
@media(max-width:1050px){.portal-category{grid-template-columns:37% 1fr}.portal-photo{height:220px;padding-left:10px}.portal-copy{padding-right:19px}.portal-copy h2{font-size:20px}}
@media(max-width:800px){.portal-hero{padding-top:48px}.portal-hero h1{font-size:40px}.portal-grid{grid-template-columns:1fr;gap:16px}.portal-category{grid-template-columns:36% 1fr}.portal-photo{height:215px;padding:25px}.portal-copy{padding:25px}.portal-copy h2{font-size:25px}.portal-method{grid-template-columns:1fr;gap:14px}.portal-method .text-link{grid-column:auto}.reading-wrap{max-width:700px}.reading-header h1{font-size:31px}.article-next{align-items:start;flex-direction:column;gap:14px}}
@media(max-width:600px){.portal-hero{padding:36px 0 25px}.portal-hero h1{font-size:32px}.portal-hero>p:last-child{font-size:12px}.portal-category{grid-template-columns:34% 1fr}.portal-photo{height:205px;padding:17px 0 17px 15px}.portal-copy{padding:22px 18px}.portal-copy h2{font-size:21px}.portal-copy p{font-size:11px;margin-bottom:14px}.portal-copy .section-kicker{font-size:8px}.portal-copy small{font-size:7px}.portal-notes{padding-top:38px}.portal-notes .guide-grid{grid-template-columns:1fr}.portal-method{margin-top:32px;padding:25px 0 32px}.portal-method h2{font-size:21px}.portal-method p{font-size:12px}.guide-index .guide-grid{grid-template-columns:1fr}.guide-index .reading-header{padding-top:34px}.reading-header{padding-top:28px;margin-bottom:25px}.reading-header h1{font-size:28px;line-height:1.5}.reading-header>p:not(.eyebrow){font-size:12px}.breadcrumb{font-size:10px;margin-top:20px}.article-meta{font-size:10px}.longform,.longform p{font-size:13px;line-height:2}.longform .article-lead{font-size:15px}.longform h2{font-size:19px;margin-top:29px}.related-guides{grid-template-columns:1fr;gap:12px}.reading-wrap{padding-bottom:40px}.article-next{padding:20px}.footer-links{gap:10px 17px;font-size:10px}}