/* Material World · refined industrial editorial system */
:root{--paper:#fff;--canvas:#f5f5f7;--ink:#292d32;--muted:#70757c;--red:#ad2932;--line:#e3e5e7;--soft:#f0f1f3;--mono:ui-monospace,SFMono-Regular,Consolas,monospace;--font:-apple-system,BlinkMacSystemFont,'Segoe UI','PingFang SC','Microsoft YaHei',sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;background:var(--paper);color:var(--ink);font:15px/1.65 var(--font);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{opacity:.35;cursor:default}a,button{touch-action:manipulation}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid var(--red);outline-offset:4px}h1,h2,h3,p{margin:0}h1,h2,h3{line-height:1.3}svg{width:22px;height:22px;stroke:currentColor;stroke-width:1.6;fill:none}img{max-width:100%;display:block}button{border:0}input,textarea,select{color:var(--ink);min-width:0}input::placeholder,textarea::placeholder{color:#92969c}.wrap{width:calc(100% - 112px);max-width:1280px;margin:0 auto}.narrow{max-width:1000px}.skip{position:fixed;top:-80px;left:20px;z-index:100;background:white;padding:12px}.skip:focus{top:10px}.red-dot,.eyebrow i{display:inline-block;background:var(--red);width:7px;height:7px}.red-dot{margin-left:8px}.eyebrow{font:11px/1.5 var(--mono);letter-spacing:.15em;color:var(--muted);display:block;margin-bottom:14px}.eyebrow i{margin-right:8px}.micro{font:10px/1.5 var(--mono);letter-spacing:.12em}.text-link{font-size:14px;border-bottom:1px solid #b4b8be;padding-bottom:5px;display:inline-block;white-space:nowrap;transition:color .2s}.text-link:hover{color:var(--red);border-color:var(--red)}.text-btn{background:transparent;padding:0;color:var(--muted);font-size:13px}.text-btn:hover{color:var(--red)}
/* restrained persistent header */
.site-header{background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20;backdrop-filter:blur(18px)}.header-inner{height:90px;display:flex;align-items:center;justify-content:space-between;gap:28px}.brand{width:204px;flex:none}.brand img{width:100%;height:auto;max-height:58px;object-fit:contain}.nav{display:flex;gap:28px;align-items:center}.nav a{font-size:13px;white-space:nowrap;padding:34px 0;position:relative}.nav a:hover{color:var(--red)}.nav a.current:after{content:'';height:2px;width:16px;position:absolute;bottom:20px;left:calc(50% - 8px);background:var(--red)}.header-tools{display:flex;gap:21px;align-items:center;white-space:nowrap}.icon-btn{background:transparent;display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;color:var(--ink);border-radius:50%;font-size:25px;line-height:1}.icon-btn:hover{background:var(--soft)}.quote-link{font-size:13px;display:flex;align-items:center;gap:7px}.cart-count{font:11px var(--mono);width:20px;height:20px;background:var(--ink);color:white;border-radius:50%;display:inline-flex;align-items:center;justify-content:center}.mobile-menu{display:none}
/* homepage / periodic index */
.home-intro{padding:52px 0 30px;display:flex;justify-content:space-between;align-items:flex-end;gap:30px}.home-intro .eyebrow{margin-bottom:12px}.home-intro h1{font-size:38px;font-weight:600;letter-spacing:-.055em;line-height:1.3}.home-intro h1 span{color:#85898e}.home-intro p{font-size:13px;color:var(--muted);margin-top:12px}.hero-search{width:330px;flex:none}.hero-search label{display:block;font-size:12px;margin-bottom:8px;color:var(--muted)}.hero-search>div{display:flex;align-items:center;border-bottom:1px solid #575d64;padding-bottom:9px}.hero-search input{width:100%;border:0;outline:0;background:transparent;font-size:14px}.hero-search button{background:transparent;color:var(--red);font-size:26px;width:35px}.hero-search>span{display:flex;gap:14px;margin-top:10px;color:#878b91;font-size:11px}.hero-search>span a{color:#535960}.hero-search a:hover{color:var(--red)}.periodic-panel{background:var(--canvas);padding:20px 24px 0;border:1px solid #ecedef;border-radius:12px;overflow:hidden}.periodic-toolbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;gap:14px}.legend{display:flex;gap:7px}.legend-btn{background:transparent;font-size:12px;color:#737880;padding:5px 10px;display:flex;align-items:center;gap:7px;border-radius:4px}.legend-btn.active{background:white;color:var(--ink);box-shadow:0 1px 3px #20242a0c}.legend-btn i{width:6px;height:6px;border-radius:50%;background:#788592}.legend-btn i.nonmetal-dot{background:#9c9b80}.legend-btn i.rare-dot{background:#b3898e}.table-tip{font-size:11px;color:var(--muted)}.table-tip>span{margin-left:12px;color:var(--red)}.periodic-scroll{overflow-x:auto;padding:2px 2px 12px;scrollbar-width:thin}.periodic-grid{display:grid;grid-template-columns:repeat(18,minmax(0,1fr));grid-template-rows:repeat(7,58px) 10px repeat(2,58px);gap:5px;position:relative}.element-tile{display:flex;flex-direction:column;background:#fff;border:1px solid #e4e7eb;border-radius:4px;padding:4px 6px;position:relative;transition:background .15s,transform .15s,border-color .15s;min-width:0;justify-content:center}.element-tile .atomic-no{font:9px/1.2 var(--mono);color:#9298a1}.element-tile b{font-size:20px;line-height:1.1;font-weight:500;letter-spacing:-.04em}.element-cn{font-size:9px;line-height:1.2;color:#737a84;margin-top:2px}.element-tile.cat-transition{background:#edf0f3;border-color:#dfe3e8}.element-tile.cat-post-transition{background:#edf1ef;border-color:#dfe5e1}.element-tile.cat-metalloid{background:#f1efe7;border-color:#e7e4d9}.element-tile.cat-nonmetal{background:#f2f0e8;border-color:#e7e4db}.element-tile.cat-halogen{background:#eeeee7}.element-tile.cat-lanthanide,.element-tile.cat-actinide{background:#f2e9eb;border-color:#e9dfe2}.element-tile.cat-alkali,.element-tile.cat-alkaline-earth{background:#ede9e5;border-color:#e3ddd6}.element-tile.cat-noble-gas{background:#eeedf2}.element-tile:hover,.element-tile:focus-visible,.element-tile.featured{background:var(--ink);color:white;border-color:var(--ink);transform:translateY(-2px)}.element-tile:hover .atomic-no,.element-tile:hover .element-cn,.element-tile.featured span,.element-tile:focus-visible span{color:#c7cbd0}.element-tile.featured:after{content:'';width:5px;height:5px;background:#c6474f;position:absolute;top:5px;right:5px}.element-tile.dimmed{opacity:.16}.series-label{font:10px/1.5 var(--mono);color:#8d9298;display:flex;align-items:center;justify-content:center;border:1px dashed #d9dce0;border-radius:4px;text-align:center}.period-label{font-size:10px;color:#8b9097;align-self:center}.period-label span{display:block;font:10px var(--mono);margin-top:4px}.table-caption{grid-column:4 / 16;grid-row:1 / 3;padding:16px 20px;align-self:center;pointer-events:none}.table-caption>span{font:9px var(--mono);letter-spacing:.18em;color:#8f959d}.table-caption strong{font-size:21px;font-weight:500;display:block;margin-top:8px;letter-spacing:.03em}.table-caption p{font-size:11px;color:#878d95;margin-top:6px}.element-inspector{display:flex;align-items:center;gap:15px;margin-top:3px;border-top:1px solid #dfe2e6;min-height:72px}.inspector-symbol{font:32px var(--font);color:var(--red);width:48px}.element-inspector strong{font-size:13px;font-weight:500}.element-inspector strong span{color:#91969e;font:11px var(--mono);margin-left:7px}.element-inspector p{font-size:10px;color:var(--muted);margin-top:3px}.element-inspector>a{margin-left:auto;font-size:12px}.element-inspector>a span{color:var(--red);margin-left:16px}
/* editorial category surfaces */
.section{padding:76px 0}.section-top{display:flex;align-items:flex-end;justify-content:space-between;gap:20px;margin-bottom:30px}.section-top h2{font-size:29px;letter-spacing:-.03em;font-weight:500}.section-top .eyebrow{margin-bottom:10px}.material-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;padding-bottom:70px}.home-materials{grid-template-columns:repeat(4,minmax(0,1fr));padding-bottom:0;gap:16px}.material-card{border:1px solid var(--line);border-radius:8px;overflow:hidden;transition:transform .2s,border-color .2s;background:white}.material-card:hover{transform:translateY(-4px);border-color:#babec5}.material-art{height:180px;background:#f5f5f7;overflow:hidden}.material-art img{width:100%;height:100%;object-fit:contain;mix-blend-mode:multiply;transition:transform .3s}.material-card:hover img{transform:scale(1.035)}.home-materials .material-art{height:155px}.material-card-body{position:relative;padding:20px 23px 27px}.card-index{font:10px var(--mono);color:#9a9ea5;display:block;margin-bottom:12px}.material-card h3{font-size:19px;font-weight:500}.material-card p{font-size:12px;color:var(--muted);margin-top:8px;padding-right:14px}.card-arrow{position:absolute;right:20px;top:20px;color:var(--red);font-size:20px}.custom-section{display:grid;grid-template-columns:1fr 1fr;background:var(--canvas);border-radius:10px;margin-bottom:80px;padding:60px 70px;align-items:center}.custom-section h2{font-size:36px;font-weight:500;letter-spacing:-.04em;line-height:1.4}.custom-section p{font-size:14px;color:var(--muted);margin:20px 0 27px}.custom-visual{position:relative;display:flex;align-items:center;justify-content:center;flex-direction:column}.custom-visual img{width:350px;mix-blend-mode:multiply}.custom-visual>span{font:11px var(--mono);letter-spacing:.15em;color:#8a9097}.btn{background:var(--red);color:white;display:inline-flex;align-items:center;justify-content:center;gap:25px;font-size:13px;line-height:1.4;font-weight:500;border:1px solid var(--red);border-radius:5px;padding:12px 20px;transition:background .15s,transform .15s;white-space:nowrap}.btn:hover{background:#92232b;border-color:#92232b}.btn.secondary{background:white;border-color:var(--line);color:var(--ink)}.btn.secondary:hover{background:var(--canvas);border-color:#b7bdc5}.btn.small{padding:8px 14px;font-size:12px}.page-heading{padding:60px 0 38px}.page-heading h1{font-size:44px;font-weight:500;letter-spacing:-.045em;line-height:1.3}.page-heading>p{font-size:15px;color:var(--muted);margin-top:18px;max-width:660px;line-height:1.8}.breadcrumbs{display:flex;align-items:center;gap:12px;font-size:11px;color:#8a8f96;padding-top:24px;flex-wrap:wrap}.breadcrumbs a:hover{color:var(--red)}.bottom-cta{border-top:1px solid var(--line);padding:40px 0 65px;display:flex;justify-content:space-between;align-items:center;gap:20px}.bottom-cta h2{font-size:23px;font-weight:500}
/* search / catalog */
.catalog-page .page-heading{padding:30px 0}.catalog-search{display:flex;background:var(--canvas);border:1px solid var(--line);border-radius:6px;overflow:hidden;max-width:790px;margin-bottom:40px;padding:5px}.catalog-search input{flex:1;background:transparent;border:0;padding:10px 18px;outline:0;width:100%}.catalog-layout{display:grid;grid-template-columns:215px minmax(0,1fr);gap:45px;padding-bottom:70px}.filters{border-top:1px solid var(--ink);padding-top:20px;align-self:start;position:sticky;top:116px}.filter-heading{display:flex;justify-content:space-between;align-items:center;margin-bottom:26px}.filter-heading h2{font-size:15px;font-weight:500}.filters label{display:block;font-size:12px;color:#777e87;margin-bottom:23px}.filters select{display:block;border:0;border-bottom:1px solid var(--line);padding:9px 0;width:100%;background:white;font-size:13px;border-radius:0;outline-offset:1px}.filters p{font-size:11px;color:#9a9fa6;line-height:1.9;margin:28px 0}.filter-custom{font-size:12px;color:var(--red)}.results-toolbar{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--ink);padding:12px 0 18px;font-size:12px;color:var(--muted)}.view-toggle{display:flex;gap:2px;background:var(--canvas);padding:3px;border-radius:4px}.view-toggle button{font-size:11px;padding:4px 9px;background:transparent;border-radius:3px;color:var(--muted)}.view-toggle button.active{background:white;color:var(--ink);box-shadow:0 1px 3px #0001}.filter-chip{display:inline-flex;align-items:center;font-size:11px;background:var(--canvas);padding:4px 9px;margin:12px 7px 0 0;border-radius:4px;gap:8px}.filter-chip button{background:transparent;padding:0;color:var(--red)}.product-row{display:grid;grid-template-columns:64px minmax(0,1fr) 100px 90px;align-items:center;gap:22px;border-bottom:1px solid var(--line);padding:23px 0;transition:background .15s}.formula-art{width:64px;height:64px;border-radius:5px;background:var(--canvas);display:flex;align-items:center;justify-content:center;font:18px var(--mono);color:#616873;overflow:hidden;word-break:break-all;text-align:center;padding:4px}.product-info h2{font-size:16px;font-weight:500;line-height:1.5}.product-info a:hover{color:var(--red)}.product-info p{font-size:11px;color:#8a919a;margin-top:6px}.product-spec{font-size:11px;color:#737a83;line-height:1.9}.product-add{border:1px solid var(--line);background:white;padding:8px 10px;border-radius:4px;font-size:12px;color:var(--ink)}.product-add:hover{color:var(--red);border-color:var(--red)}.product-card-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;padding-top:20px}.product-card-grid .product-row{display:flex;flex-direction:column;align-items:flex-start;border:1px solid var(--line);border-radius:6px;padding:22px;gap:14px}.product-card-grid .formula-art{width:100%;height:90px;font-size:27px}.product-card-grid .product-info{flex:1}.product-card-grid .product-spec{font-size:11px}.product-card-grid .product-add{align-self:stretch}#pagination{display:flex;align-items:center;justify-content:center;gap:6px;flex-wrap:wrap;padding-top:30px}#pagination button{background:white;border:1px solid var(--line);border-radius:4px;padding:7px 12px;font-size:12px}#pagination button.active{background:var(--ink);color:white;border-color:var(--ink)}.empty-state{padding:64px 20px;text-align:center;background:var(--canvas);border-radius:6px;margin-top:20px}.empty-state h2{font-size:20px;font-weight:500;margin-bottom:12px}.empty-state p{font-size:13px;color:var(--muted);margin-bottom:20px}
/* product / element reference */
.detail-page{padding-top:35px;padding-bottom:70px}.detail-top{display:grid;grid-template-columns:44% minmax(0,1fr);gap:65px;align-items:start}.detail-visual{border-radius:10px;background:var(--canvas);padding:30px;position:relative;min-height:380px;display:flex;flex-direction:column;align-items:center;justify-content:center}.detail-visual img{width:100%;mix-blend-mode:multiply}.visual-note{font-size:10px;color:#969ba3;position:absolute;bottom:18px;left:25px}.detail-formula{position:absolute;top:24px;left:25px;font:18px var(--mono);color:#7e858e;max-width:85%;word-break:break-all}.detail-content .eyebrow{margin-top:5px}.detail-content h1{font-size:32px;letter-spacing:-.025em;font-weight:500}.english-name{font-size:12px;color:#8b929b;margin:8px 0 22px;line-height:1.7}.detail-description{font-size:14px;color:#636c76;line-height:1.9;max-width:490px}.detail-meta{font-size:11px;color:#8a919a;display:flex;gap:18px;flex-wrap:wrap;margin:18px 0 25px}.selector-label{font-size:12px;color:#737c87;margin:20px 0 10px}.selector-chips{display:flex;gap:7px;flex-wrap:wrap}.selector-chip{padding:8px 11px;font-size:12px;background:white;border:1px solid var(--line);border-radius:4px;line-height:1.5;max-width:100%;white-space:normal;text-align:left}.selector-chip.active{border-color:var(--ink);background:var(--canvas);box-shadow:inset 0 0 0 1px var(--ink)}.detail-actions{display:flex;gap:10px;margin-top:26px;align-items:center;flex-wrap:wrap}.quantity{border:1px solid var(--line);border-radius:4px;padding:10px;width:70px;font:13px var(--mono)}.detail-note{font-size:11px;color:#9299a2;margin-top:14px}.detail-sections{margin-top:55px;border-top:1px solid var(--line);padding-top:30px;display:grid;grid-template-columns:1fr 1fr;gap:55px}.detail-sections h2{font-size:18px;font-weight:500;margin-bottom:20px}.data-table{width:100%;border-collapse:collapse;font-size:13px}.data-table th,.data-table td{padding:14px 12px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top;overflow-wrap:anywhere}.data-table th{color:#858d97;font-weight:400;min-width:90px;background:#fafafa}.data-table td{line-height:1.75}.doc-link{display:flex;justify-content:space-between;align-items:center;padding:18px 0;border-bottom:1px solid var(--line);font-size:14px;background:transparent;width:100%;text-align:left}.doc-link>span{color:var(--red)}.related-section{padding-top:55px}.related-section h2{font-size:23px;font-weight:500;margin-bottom:20px}.related-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.related-card{background:var(--canvas);padding:25px;border-radius:6px}.related-card .formula{font:24px var(--mono);color:#8a929c;margin-bottom:18px;overflow-wrap:anywhere}.related-card h3{font-size:15px;font-weight:500;line-height:1.6;margin-bottom:12px}.related-card>span{font-size:11px;color:var(--red)}.element-hero{display:flex;gap:36px;padding:55px 0 40px;align-items:center}.element-emblem{width:150px;height:170px;flex:none;background:var(--canvas);padding:18px 23px;border-radius:6px;display:flex;flex-direction:column}.element-emblem>span{font:13px var(--mono);color:var(--muted)}.element-emblem>b{font-size:65px;line-height:1.3;font-weight:500;letter-spacing:-.08em}.element-emblem small{font:11px var(--mono);color:#8c929a}.element-hero h1{font-size:40px;font-weight:500;letter-spacing:-.04em;margin-bottom:12px}.element-hero h1 span{font:17px var(--mono);color:#9399a1;margin-left:18px;letter-spacing:0}.element-hero p{color:#737c86;font-size:14px;max-width:640px;line-height:1.9}.element-tabs{display:flex;gap:36px;border-bottom:1px solid var(--line);padding-bottom:16px;font-size:13px;margin-bottom:32px}.element-tabs a:hover{color:var(--red)}.element-actions{display:grid;grid-template-columns:1fr 1fr;gap:20px;padding-bottom:70px}.element-related{margin-bottom:30px}.element-related+.btn{margin-bottom:65px}.subheading{font-size:20px;font-weight:500;margin:32px 0 18px}.table-wrap{overflow-x:auto;border-top:1px solid var(--line)}.note{color:#8a919a;font-size:12px;line-height:1.9;margin:18px 0 30px}.notice{font-size:13px;background:#f7f1f1;color:#86545a;padding:16px 20px;border-left:2px solid var(--red);margin-bottom:25px}.narrow>.text-link:last-child{margin-bottom:60px}
/* editorial inner pages */
.industry-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:0;border-top:1px solid var(--line);border-left:1px solid var(--line);margin-bottom:70px}.industry-card{padding:32px 25px;border-right:1px solid var(--line);border-bottom:1px solid var(--line);min-height:210px;transition:background .2s}.industry-card:hover{background:var(--canvas)}.industry-number{font:11px var(--mono);color:#a0a6ad}.industry-card h2{font-size:18px;font-weight:500;margin-top:28px}.industry-card p{font:10px var(--mono);color:#939aa3;margin-top:8px}.industry-card>span:last-child{font-size:11px;color:var(--red);display:block;margin-top:25px}.shortcut-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px;margin-bottom:45px}.element-shortcut{background:var(--canvas);padding:30px;border-radius:5px}.element-shortcut b{font:38px var(--mono);display:block;margin-bottom:24px}.element-shortcut span{font-size:12px;color:var(--red)}.support-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px;margin:0 0 45px}.support-grid.two{grid-template-columns:1fr 1fr}.feature-link{border:1px solid var(--line);border-radius:7px;padding:32px;display:block}.feature-link h2{font-size:22px;font-weight:500;margin:10px 0 13px}.feature-link p{color:var(--muted);font-size:14px;line-height:1.9;margin-bottom:30px}.feature-link>b{font-size:12px;color:var(--red);font-weight:400}.feature-link:hover{border-color:#b8bdc4}.prose{max-width:750px;margin:10px auto 65px}.prose h2{font-size:24px;font-weight:500;margin:38px 0 18px;letter-spacing:-.02em}.prose p{font-size:15px;color:#6f7780;line-height:2;margin:14px 0 20px}.prose a{color:var(--red)}.about-hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;padding-top:25px}.about-art img{width:360px;margin:auto;mix-blend-mode:multiply}.contact-panel{background:var(--canvas);padding:45px 55px;border-radius:9px;display:grid;grid-template-columns:1fr 1fr;margin-bottom:70px;gap:30px}.contact-panel h2{font-size:30px;font-weight:500}.contact-panel p{font-size:13px;line-height:2.1;color:var(--muted);margin-top:15px}.contact-panel>div:nth-child(2)>a:first-child{font-size:24px;letter-spacing:-.02em}.contact-panel .text-link{margin-top:15px}
/* quote and calculators */
.quote-layout{display:grid;grid-template-columns:1.15fr 1fr;gap:65px;padding-bottom:70px}.quote-form{background:var(--canvas);padding:30px;border-radius:8px}.quote-form h2{font-size:20px;font-weight:500;margin-bottom:24px}label{display:block}.quote-form label,.tool-card label{font-size:12px;color:#727b85;margin-top:16px}.quote-form input,.quote-form textarea,.tool-card input{display:block;width:100%;border:1px solid #dadddf;border-radius:4px;background:white;padding:11px 12px;margin-top:7px;font-size:14px;outline-offset:2px}.quote-form textarea{resize:vertical}.quote-form .btn{width:100%;margin-top:20px}.quote-form .note{margin-bottom:0}.quote-item{border-top:1px solid var(--line);padding:24px 0;position:relative}.quote-item h2{font-size:17px;font-weight:500;padding-right:30px}.quote-item p{font-size:12px;color:var(--muted);margin:10px 0 18px}.quote-item .remove{position:absolute;right:0;top:22px;background:transparent;font-size:20px;color:#8b929b}.quote-qty{display:flex;align-items:center;gap:12px;font-size:12px;color:#838a92}.quote-qty input{width:65px;padding:6px;border:1px solid var(--line);border-radius:4px}.export-actions{display:flex;gap:20px;margin-top:24px;align-items:center}.tools-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;padding-bottom:75px;align-items:start}.tool-card{border:1px solid var(--line);padding:28px;border-radius:8px}.tool-card h2{font-size:21px;font-weight:500;margin-bottom:14px}.tool-card>p{font-size:12px;color:var(--muted);min-height:42px}.tool-card .btn{margin-top:22px}.tool-result{font:13px/1.8 var(--mono);margin-top:22px;overflow-wrap:anywhere}.tool-result strong{font-size:25px;display:block;font-weight:500;color:var(--red);margin-bottom:10px}.result-error{color:var(--red)}
/* footer and dialogs */
footer{background:#272b30;color:#c4c8ce;padding-top:52px}.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.3fr;gap:55px;padding-bottom:42px}.footer-brand{font-size:20px;font-weight:500;color:white;letter-spacing:.03em}.footer-grid p{font-size:11px;line-height:1.9;color:#959da8;margin-top:15px}.footer-grid h3{font-size:12px;font-weight:500;margin-bottom:18px;color:#f0f1f3}.footer-grid>div>a:not(.footer-brand){display:block;font-size:11px;color:#a9b0ba;margin:8px 0}.footer-grid a:hover{color:white}.footer-grid .micro{display:block;color:#737d89;margin-top:24px}.footer-bottom{padding:19px 0;border-top:1px solid #42484f;display:flex;gap:25px;font-size:10px;color:#939da8;flex-wrap:wrap}.footer-bottom>span:last-child{margin-left:auto}dialog{border:1px solid var(--line);border-radius:10px;padding:35px;max-width:620px;width:calc(100% - 40px);color:var(--ink);box-shadow:0 30px 90px #0002}dialog::backdrop{background:#20242a66;backdrop-filter:blur(5px)}.dialog-close{position:absolute;right:12px;top:12px}#doc-content h2{font-size:25px;font-weight:500;margin-bottom:20px}#doc-content p{font-size:14px;color:var(--muted);line-height:1.9;margin-bottom:24px}.search-dialog{max-width:760px;padding:20px;top:10vh;margin-top:0}.search-form{display:flex;align-items:center;gap:12px}.search-form input{flex:1;border:0;outline:0;padding:12px 0;background:white;font-size:16px}.search-hint{font-size:11px;color:#929aa3;padding-top:16px;border-top:1px solid var(--line);margin-top:18px}.suggestion{display:block;padding:13px 12px;border-bottom:1px solid var(--line);font-size:13px}.suggestion:hover{background:var(--canvas)}.suggestion span{color:var(--muted);font:11px var(--mono);margin-left:15px}#toast{position:fixed;bottom:28px;left:50%;transform:translate(-50%,15px);background:var(--ink);color:white;border-radius:6px;padding:13px 22px;opacity:0;pointer-events:none;transition:opacity .2s,transform .2s;z-index:80;font-size:13px;max-width:90vw;text-align:center}#toast.show{opacity:1;transform:translate(-50%,0)}.loading{padding:70px 0;color:var(--muted)}
@media(min-width:1600px){.wrap{max-width:1360px}.periodic-grid{grid-template-rows:repeat(7,63px) 10px repeat(2,63px)}.element-tile b{font-size:23px}}
@media(max-width:1200px){.wrap{width:calc(100% - 64px)}.nav{gap:18px}.brand{width:178px}.header-inner{gap:18px}.header-tools{gap:14px}.home-intro h1{font-size:33px}.hero-search{width:285px}.periodic-grid{grid-template-rows:repeat(7,52px) 10px repeat(2,52px)}.element-tile{padding:3px 4px}.element-tile b{font-size:18px}.element-cn{font-size:9px}.table-caption{padding:14px}.table-caption strong{font-size:19px}.detail-top{gap:35px}.detail-content h1{font-size:28px}.material-card-body{padding:20px}.home-materials .material-card h3{font-size:17px}.footer-grid{gap:25px}.catalog-layout{gap:30px;grid-template-columns:190px minmax(0,1fr)}.product-row{grid-template-columns:55px minmax(0,1fr) 80px;gap:15px}.product-spec{display:none}.product-card-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.tools-grid{gap:14px}.tool-card{padding:22px}}
@media(max-width:950px){.nav{gap:16px}.nav a{font-size:12px}.brand{width:150px}.header-inner{height:76px;gap:15px}.header-tools{gap:8px}.quote-link{font-size:12px}.home-intro{display:block;padding-top:35px}.hero-search{width:100%;margin-top:25px;max-width:450px}.table-caption strong{font-size:18px}.periodic-grid{min-width:865px}.home-materials{grid-template-columns:repeat(2,minmax(0,1fr))}.material-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.custom-section{padding:40px}.industry-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.support-grid{grid-template-columns:1fr}.support-grid.two{grid-template-columns:1fr 1fr}.detail-top{grid-template-columns:40% minmax(0,1fr);gap:28px}.detail-visual{min-height:300px;padding:20px}.detail-sections{gap:30px}.quote-layout{gap:30px}.tools-grid{grid-template-columns:1fr 1fr}.footer-grid{grid-template-columns:1fr 1fr;gap:30px}.footer-bottom>span:last-child{margin-left:0}}
@media(max-width:760px){.wrap{width:calc(100% - 36px)}.header-inner{height:72px}.brand{width:166px}.header-tools{gap:10px}.mobile-menu{display:inline-flex;font-size:21px}.nav{display:none;position:absolute;top:71px;left:0;right:0;background:white;padding:15px 24px 25px;border-bottom:1px solid var(--line);box-shadow:0 12px 18px #00000008}.nav.open{display:flex;flex-direction:column;gap:0;align-items:stretch}.nav a{padding:13px 0;font-size:14px;border-bottom:1px solid var(--line)}.nav a.current:after{left:auto;right:0;bottom:20px;width:5px;height:5px}.header-tools .icon-btn{width:27px}.quote-link{font-size:11px;gap:4px}.home-intro{padding-top:31px;padding-bottom:23px}.home-intro h1{font-size:29px;line-height:1.5;letter-spacing:-.055em}.home-intro h1 span{display:block}.home-intro p{font-size:11px;margin-top:8px}.eyebrow{font-size:10px;letter-spacing:.12em}.hero-search{margin-top:22px;max-width:none}.hero-search>span{font-size:10px}.periodic-panel{padding:14px 12px 0;border-radius:8px}.periodic-toolbar{margin-bottom:9px;display:block}.legend{gap:0;justify-content:space-between}.legend-btn{padding:5px 8px;font-size:11px}.table-tip{display:block;font-size:10px;padding:9px 0 0}.periodic-grid{min-width:865px;grid-template-rows:repeat(7,49px) 8px repeat(2,49px);gap:4px}.periodic-scroll{margin-right:-8px}.table-caption{padding:12px}.table-caption strong{font-size:18px}.element-inspector{min-height:68px;gap:8px;flex-wrap:wrap;padding:9px 0}.inspector-symbol{font-size:26px;width:35px}.element-inspector p{font-size:9px}.element-inspector>a{font-size:10px;max-width:140px;white-space:normal}.element-inspector>a span{margin-left:4px}.section{padding:44px 0}.section-top{align-items:flex-start;gap:15px;margin-bottom:23px}.section-top h2{font-size:23px;line-height:1.5}.section-top .text-link{font-size:11px;margin-top:24px}.home-materials{gap:12px}.home-materials .material-art{height:115px}.material-card-body{padding:16px}.material-card h3,.home-materials .material-card h3{font-size:16px}.material-card p{font-size:11px}.card-index{margin-bottom:8px;font-size:9px}.card-arrow{right:13px;top:12px;font-size:17px}.custom-section{padding:30px;grid-template-columns:1fr;margin-bottom:45px}.custom-section h2{font-size:29px}.custom-section p{font-size:13px;margin:15px 0 22px}.custom-visual{margin-top:20px}.custom-visual img{width:240px}.custom-visual>span{font-size:9px}.page-heading{padding:36px 0 27px}.page-heading h1{font-size:32px}.page-heading>p{font-size:13px;margin-top:14px}.material-grid{gap:14px;padding-bottom:40px}.material-art{height:130px}.catalog-search{margin-bottom:25px}.catalog-search input{padding:9px 10px;font-size:12px}.catalog-search .btn{padding:10px 16px}.catalog-layout{grid-template-columns:1fr;gap:15px;padding-bottom:45px}.filters{position:static;display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:10px;border:1px solid var(--line);padding:15px;border-radius:5px}.filter-heading{grid-column:1/-1;margin-bottom:4px}.filter-heading h2{font-size:13px}.filters label{margin:0;font-size:10px}.filters select{font-size:11px;padding:8px 0}.filters>p{display:none}.filter-custom{grid-column:1/-1;margin-top:5px;font-size:11px}.results-toolbar{padding-top:10px;font-size:11px}.product-row{grid-template-columns:45px minmax(0,1fr) 65px;gap:12px;padding:20px 0}.formula-art{width:45px;height:49px;font-size:14px}.product-info h2{font-size:14px}.product-info p{font-size:10px}.product-add{font-size:10px;padding:8px 5px}.product-card-grid{gap:12px}.product-card-grid .product-row{padding:15px}.product-card-grid .formula-art{height:70px;font-size:22px}.product-card-grid .product-spec{display:block}.detail-top{grid-template-columns:1fr;gap:28px}.detail-visual{min-height:240px;max-height:270px}.detail-visual img{height:200px;object-fit:contain}.detail-formula{font-size:15px}.detail-content h1{font-size:27px}.english-name{font-size:11px}.detail-description{font-size:13px}.detail-sections{grid-template-columns:1fr;gap:30px;margin-top:35px}.related-grid{grid-template-columns:1fr;gap:12px}.related-card{padding:20px;display:grid;grid-template-columns:85px 1fr;gap:10px;align-items:center}.related-card .formula{grid-row:1/3;margin:0;font-size:20px}.related-card h3{margin:0;font-size:14px}.related-card>span{font-size:10px}.element-hero{padding:32px 0 25px;gap:20px;align-items:flex-start}.element-emblem{width:95px;height:120px;padding:12px 15px}.element-emblem>b{font-size:43px}.element-emblem>span,.element-emblem small{font-size:10px}.element-hero h1{font-size:30px}.element-hero h1 span{display:block;font-size:12px;margin:7px 0 0}.element-hero p{font-size:12px;line-height:1.8}.element-hero .eyebrow{margin-bottom:8px}.element-tabs{gap:25px;font-size:12px;padding-bottom:13px}.element-actions{grid-template-columns:1fr;padding-bottom:40px;gap:14px}.data-table{font-size:12px}.data-table td,.data-table th{padding:12px 10px}.note{font-size:11px}.industry-grid{grid-template-columns:repeat(2,minmax(0,1fr));margin-bottom:40px}.industry-card{padding:22px 18px;min-height:190px}.industry-card h2{font-size:16px;margin-top:22px}.industry-card p{font-size:9px}.industry-card>span:last-child{font-size:10px;margin-top:20px}.support-grid.two{grid-template-columns:1fr}.feature-link{padding:25px}.feature-link h2{font-size:20px}.feature-link p{font-size:13px}.about-hero{grid-template-columns:1fr}.about-art{background:var(--canvas);border-radius:6px}.about-art img{height:180px}.prose{margin-bottom:45px}.prose h2{font-size:22px;margin-top:30px}.prose p{font-size:14px}.contact-panel{padding:28px;grid-template-columns:1fr;gap:22px;margin-bottom:40px}.contact-panel>div:nth-child(2)>a:first-child{font-size:20px}.quote-layout{grid-template-columns:1fr;gap:30px}.quote-form{padding:23px}.export-actions{gap:15px}.export-actions .btn{font-size:11px;padding:10px 12px}.tools-grid{grid-template-columns:1fr;padding-bottom:40px}.tool-card{padding:25px}.shortcut-grid{grid-template-columns:1fr 1fr;gap:12px}.element-shortcut{padding:22px}.element-shortcut b{font-size:30px}.bottom-cta{padding:28px 0 40px;align-items:flex-start;flex-direction:column}.bottom-cta h2{font-size:21px}footer{padding-top:36px}.footer-grid{gap:30px 20px;padding-bottom:30px}.footer-grid>div:first-child{grid-column:1/-1}.footer-grid>div:last-child{grid-column:1/-1}.footer-grid p{font-size:11px;margin-top:10px}.footer-grid h3{margin-bottom:12px}.footer-grid .micro{margin-top:14px}.footer-bottom{gap:12px 20px;font-size:9px}.footer-bottom>span:last-child{width:100%}.search-dialog{padding:14px;top:6vh}.search-form{gap:7px}.search-form input{font-size:12px}.search-form svg{width:18px;flex:none}.search-form .btn{font-size:11px;padding:8px 10px}.search-form .icon-btn{width:25px;flex:none}dialog{padding:28px 22px}#doc-content h2{font-size:23px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}
@media print{.site-header,footer,.detail-actions,.detail-note,.related-section,.dialog-close{display:none}body{font-size:11px}.wrap{width:100%}dialog[open]{position:static;box-shadow:none;border:0}.periodic-grid{min-width:0}.detail-top{grid-template-columns:35% 1fr}.detail-content h1{font-size:24px}}
.formula-art.has-product-photo{background:#fff;padding:0}.formula-art.has-product-photo img{width:100%;height:100%;object-fit:contain;display:block}.formula-art.has-form-art{position:relative;background:linear-gradient(145deg,#f7f9fa,#e7edf0);padding:0}.formula-art.has-form-art img{width:100%;height:100%;object-fit:contain;opacity:.42;display:block}.formula-art.has-form-art span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:16px var(--mono);color:#364553;text-shadow:0 1px 2px #fff}.related-card .formula.has-product-photo,.related-card .formula.has-form-art{height:112px;overflow:hidden;border-radius:4px;background:#fff}.related-card .formula.has-product-photo img,.related-card .formula.has-form-art img{width:100%;height:100%;object-fit:contain;display:block}.related-card .formula.has-form-art{position:relative;background:linear-gradient(145deg,#f7f9fa,#e7edf0)}.related-card .formula.has-form-art img{opacity:.42}.related-card .formula.has-form-art span{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font:20px var(--mono);color:#364553;text-shadow:0 1px 2px #fff}@media(max-width:760px){.related-card .formula.has-product-photo,.related-card .formula.has-form-art{height:75px}}