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@media(max-width:900px){.formintro{grid-template-columns:1fr}}
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/* V20: align the LNP catalog with the established DC Chemicals brand. */
:root{--navy:#15384d;--blue:#107bbf;--blue2:#0a5f96;--ink:#222;--muted:#5e6d78;--line:#d9e2e8;--soft:#f5f7f9;--cyan:#eaf6fb;--shadow:0 10px 28px rgba(25,62,84,.08);--font:Arial,"Microsoft YaHei","微软雅黑","Helvetica Neue",sans-serif}
body{color:var(--ink);font-family:var(--font);letter-spacing:0}
a{color:var(--blue)}
.wrap{width:min(1180px,calc(100% - 40px))}
.topbar{background:#edf7fc;color:#39596c;border-top:4px solid var(--blue);border-bottom:1px solid #d7eaf4;padding:6px 20px}
.topbar strong{color:#174f70}
header{background:rgba(255,255,255,.98);border-bottom:1px solid #d8e0e5;box-shadow:0 3px 12px rgba(24,54,72,.06)}
.headerin{height:72px}
.brand{color:#163f58;font-size:1.02rem;letter-spacing:0}
.brand-logo{display:block;width:auto;height:50px;object-fit:contain}
.brand small{color:var(--blue);font-size:.67rem;font-weight:600;letter-spacing:.02em}
.mark{width:42px;height:42px;border-radius:4px;background:var(--blue);box-shadow:inset 0 -3px 0 rgba(0,0,0,.08);font-size:.86rem}
nav{gap:2px}
nav a{position:relative;color:#333;padding:23px 11px 20px;font-size:.86rem;font-weight:600}
nav a:hover,nav a[aria-current="page"]{color:var(--blue);text-decoration:none}
nav a:after{content:"";position:absolute;left:10px;right:10px;bottom:13px;height:2px;background:var(--blue);transform:scaleX(0);transition:transform .16s ease}
nav a:hover:after,nav a[aria-current="page"]:after{transform:scaleX(1)}
.nav-dropdown{position:relative;display:flex;align-items:stretch}
.nav-dropdown-trigger{display:flex;align-items:center;gap:6px}
.nav-dropdown-trigger>span{font-size:.72rem;transition:transform .18s ease}
.nav-dropdown-menu{position:absolute;z-index:80;top:100%;left:-10px;width:min(455px,calc(100vw - 40px));max-height:min(720px,calc(100vh - 108px));overflow:auto;padding:10px 0 12px;border:1px solid rgba(255,255,255,.2);border-top:3px solid #75c9f1;border-radius:0 0 7px 7px;background:linear-gradient(180deg,#137fbd 0%,#086da8 100%);box-shadow:0 18px 38px rgba(10,55,82,.24);opacity:0;visibility:hidden;pointer-events:none;transform:translateY(7px);transition:opacity .16s ease,transform .16s ease,visibility .16s ease}
.nav-dropdown:hover .nav-dropdown-menu,.nav-dropdown:focus-within .nav-dropdown-menu{opacity:1;visibility:visible;pointer-events:auto;transform:translateY(0)}
.nav-dropdown:hover .nav-dropdown-trigger>span,.nav-dropdown:focus-within .nav-dropdown-trigger>span{transform:rotate(180deg)}
.nav-dropdown-title{padding:5px 20px 8px;color:#d9f2ff;font-size:.68rem;font-weight:800;letter-spacing:.1em;text-transform:uppercase}
nav .nav-dropdown-menu a{display:block;padding:8px 20px;border-left:3px solid transparent;color:#fff;font-size:.82rem;font-weight:500;line-height:1.35;white-space:normal}
nav .nav-dropdown-menu a:after{display:none}
nav .nav-dropdown-menu a:hover,nav .nav-dropdown-menu a:focus-visible{border-left-color:#a7e1fb;background:rgba(255,255,255,.12);color:#fff;text-decoration:none;outline:none}
nav .nav-dropdown-menu .nav-dropdown-all{margin-top:8px;padding-top:12px;border-top:1px solid rgba(255,255,255,.24);font-weight:750}
.nav-dropdown-menu{scrollbar-color:rgba(255,255,255,.55) transparent;scrollbar-width:thin}
.crumbs{background:#f6f8f9;border-bottom:1px solid #e0e6ea;color:#65727b}
.btn{border-radius:5px;padding:10px 17px;font-weight:700;box-shadow:none;transform:none!important}
.btn.primary,.btn.dark{background:var(--blue);color:#fff}
.btn.primary:hover,.btn.dark:hover{background:var(--blue2)}
.btn.outline{border-color:#8fc6e1;background:#fff;color:var(--blue2)}
.cartcount{background:var(--blue);color:#fff}
.product{padding:38px 0 34px}
.productgrid{gap:44px}
.product h1,.sectiontitle,.description h2,.quotebox h2,.modalhead h2{font-family:var(--font)}
.product h1{font-size:clamp(2rem,3.25vw,2.8rem);font-weight:700;line-height:1.14;letter-spacing:-.018em;color:#17374a}
.subtitle{color:#596b77}
.imagebox{min-height:380px;background:#fff;border:1px solid #d5e0e6;border-radius:7px;padding:30px;box-shadow:0 5px 18px rgba(31,72,94,.06)}
.imagebox:before{display:none}
.zoom{border-radius:4px}
.featuredbadge{border-radius:3px;background:#148218}
.cat{color:var(--blue);letter-spacing:.07em}
.chip,.literaturetag,.lbadge{border-radius:4px}
.research-highlights{margin:4px 0 19px}
.research-highlights-label{display:block;margin-bottom:8px;color:#627480;font-size:.72rem;font-weight:700;letter-spacing:.08em;text-transform:uppercase}
.research-highlight-list{display:flex;flex-wrap:wrap;gap:8px}
.research-highlight{display:inline-flex;align-items:center;min-height:34px;border:1px solid #b9dceb;border-left:3px solid var(--blue);border-radius:4px;background:#f4fafd;padding:7px 10px;color:#164d6b;font-size:.77rem;font-weight:700;line-height:1.3}
.research-highlights-note{display:block;margin-top:7px;color:#71818b;font-size:.68rem;line-height:1.4}
.buybox{position:relative;border:1px solid #cedbe3;border-top:4px solid var(--blue);background:#fff;border-radius:7px;padding:18px;box-shadow:var(--shadow)}
.buyhead{margin-bottom:13px}
.buyhead h2{font-size:.96rem;color:#183d54}
.buyhead span{color:#6c7a83}
.packs{gap:10px}
.pack{border:1px solid #cfdce4;border-radius:5px;background:#fff;padding:12px 11px;transition:border-color .16s ease,background .16s ease,box-shadow .16s ease}
.pack:hover{border-color:#73b7d8}
.pack.active{border:2px solid var(--blue);background:#edf8fd;box-shadow:0 5px 14px rgba(16,123,191,.12);transform:none}
.pack .size{color:#18384c;font-weight:700}
.pack .price{display:block;margin-top:4px;color:var(--blue2);font-size:1.06rem;font-weight:700;line-height:1.25;letter-spacing:0}
.pack.active .price{color:#075986}
.selection{margin-top:15px}
.quantity{border-radius:4px}
.quantity button{background:#edf3f6;color:#21465c}
.total small{font-size:.72rem;font-weight:600;text-transform:uppercase;letter-spacing:.04em}
.total strong{display:block;color:#0a5f96;font-size:1.28rem;font-weight:700;line-height:1.25}
.valuepromise{border-color:#efb0aa;border-radius:4px;background:#fff3f2;color:#b42318}
.description{border-block:1px solid #e0e6ea;background:#fff}
.sectioneyebrow{color:var(--blue);letter-spacing:.11em}
.sectiontitle,.description h2{color:#183b50;font-weight:700;letter-spacing:-.012em}
.description h2{border-left:4px solid var(--blue);padding-left:13px}
.recommendations{background:#f5f7f9;border-bottom:1px solid #dfe6ea}
.recommend-card,.phcard,.doc,.formcard,.metric,.formcalc,.calc-card,.calccard,.faqitem,.quotebox,.taxonomy-card,.catalog-card{border-radius:7px;box-shadow:0 5px 18px rgba(28,67,89,.05)}
.recommend-label,.recommend-tags span,.taxonomy-count{border-radius:4px}
.recommend-control{border-radius:4px;box-shadow:none}
.recommend-control:hover:not(:disabled){background:var(--blue);border-color:var(--blue)}
.content{background:#fff}
.tabs{border-bottom:1px solid #ccd9e1}
.tab{font-weight:700}
.tab.active{color:var(--blue);border-bottom-color:var(--blue)}
table{border-radius:5px;border-color:#d5e0e6}
th{background:#eaf6fb;color:#0a5f96}
tbody tr:nth-child(even){background:#fafcfd}
.docicon{border-radius:4px;background:#eaf6fb;color:var(--blue)}
.calculators{background:#f1f5f7;color:var(--ink);border-block:1px solid #dce5ea}
.calculators .sectiontitle{color:#173b50}
.calculators .sectioneyebrow{color:var(--blue)}
.calc-intro,.calculators .calc-intro{color:#60717d}
.calc-card,.calccard{border:1px solid #d2dee5;background:#fff;color:var(--ink);overflow:hidden}
.calc-tabs,.calctabs{background:#f8fafb}
.calc-tab.active,.calctab.active{color:var(--blue2);border-bottom-color:var(--blue)}
.calc-result,.calcresult{border-radius:4px;background:#edf7fc}
.stock{background:#fff}
.quote{background:#eaf6fb}
.quotebox{border-top:4px solid var(--blue)}
footer{background:#203b4c;color:#c4d2da}
footer strong,.foot .brand{color:#fff}
.catalog-hero,.category-hero{background:#eef7fc;border-bottom:1px solid #d6e8f2}
.catalog-hero h1,.category-hero h1{color:#173b50}
.catalog-search input,.catalog-search select{border-radius:5px;border-color:#8fc6e1}
.catalog-search input:focus,.catalog-search select:focus{outline:2px solid rgba(16,123,191,.18);border-color:var(--blue)}
.catalog-card,.taxonomy-card{border-color:#d8e2e8}
.catalog-card:hover,.taxonomy-card:hover{border-color:#8fc6e1;box-shadow:0 9px 23px rgba(16,96,143,.1)}
.catalog-image{background:#fff;border-bottom:1px solid #e5eaed}
.catalog-price{color:#0a5f96;font-size:1rem}
.classification-note{border-left-color:var(--blue);border-radius:0 5px 5px 0}
@media(max-width:640px){.topbar{font-size:.76rem}.headerin{height:62px}.mark{width:38px;height:38px}.product h1{font-size:clamp(1.75rem,8.6vw,2.25rem)}.imagebox{min-height:270px}.pack .price{font-size:1rem}.total strong{font-size:1.16rem}.buybox{padding:15px}.productgrid{gap:28px}.research-highlight-list{display:grid;grid-template-columns:1fr}.research-highlight{width:100%}}

/* V21: keep every catalog structure image inside its dedicated image cell. */
.catalog-card{isolation:isolate}
.catalog-image{position:relative;display:flex;height:220px;min-width:0;align-items:center;justify-content:center;overflow:hidden;contain:layout paint;padding:24px;background:#fff}
.catalog-image img{display:block;flex:0 1 auto;width:auto!important;height:auto!important;max-width:100%!important;max-height:100%!important;object-fit:contain!important;object-position:center!important}
.catalog-body{position:relative;z-index:2;background:#fff;border-top:1px solid #e5eaed}
@media(max-width:640px){.catalog-image{height:210px;padding:20px}}

/* Keep calculator labels above a single, aligned value-and-unit control. */
.calc-fields label{display:grid;grid-template-columns:minmax(0,1fr) 78px;grid-template-rows:auto 42px;align-items:end;row-gap:6px;min-width:0;line-height:1.35}
.calc-fields input{grid-column:1;grid-row:2;width:100%;min-width:0}
.calc-fields select,.calc-fields label>span{grid-column:2;grid-row:2;width:100%;align-items:center;justify-content:center}

/* Product catalog: DC Chemicals-style horizontal product directory. */
.catalog-section{padding-top:30px}
.catalog-table-head,.catalog-row{display:grid;grid-template-columns:minmax(120px,.62fr) minmax(190px,1.05fr) minmax(0,3.7fr) minmax(210px,1.15fr);column-gap:24px}
.catalog-table-head{align-items:end;padding:0 14px 14px;border-bottom:2px solid #d9dee2;color:#2b3135;font-size:.95rem;font-weight:700}
.catalog-list{display:flex;flex-direction:column}
.catalog-row{align-items:start;min-height:188px;padding:22px 14px;border:0;border-bottom:1px solid #d9dee2;border-radius:0;background:#fff;box-shadow:none;overflow:visible;isolation:isolate}
.catalog-row:hover{border-color:#d9dee2;box-shadow:none}
.catalog-row[hidden]{display:none!important}
.catalog-catno a,.catalog-product-name{color:var(--blue);font-weight:700;line-height:1.34}
.catalog-catno a{font-size:.95rem;letter-spacing:.01em}
.catalog-product-line{display:flex;align-items:flex-start;gap:6px;flex-wrap:wrap}
.catalog-product-name{font-size:.98rem}
.catalog-featured{display:inline-block;border-radius:4px;background:#128214;color:#fff;padding:2px 6px;font-size:.82rem;font-weight:500;line-height:1.45}
.catalog-application{display:flex;min-width:0;flex-direction:column;align-items:stretch}
.catalog-application p{display:-webkit-box;margin:0;color:#272d31;font-size:.94rem;line-height:1.55;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:2}
.catalog-row.description-open .catalog-application p{display:block;max-height:none;overflow:visible;-webkit-box-orient:initial;-webkit-line-clamp:unset}
.catalog-description-toggle{position:relative;display:flex;flex:0 0 auto;align-self:center;align-items:center;gap:12px;margin:12px auto 0;border:0;background:transparent;color:var(--blue);font-size:.9rem;font-weight:700;cursor:pointer}
.catalog-description-toggle:hover{text-decoration:underline}
.catalog-description-toggle i{width:12px;height:12px;border-right:2px solid currentColor;border-bottom:2px solid currentColor;transform:translateY(-3px) rotate(45deg);transition:transform .16s ease}
.catalog-description-toggle[aria-expanded="true"] i{transform:translateY(3px) rotate(225deg)}
.catalog-row .catalog-image{display:flex;width:100%;height:140px;min-width:0;align-items:center;justify-content:center;overflow:hidden;contain:layout paint;padding:8px;background:#fff;border:0}
.catalog-row .catalog-image img{display:block;width:auto!important;height:auto!important;max-width:100%!important;max-height:100%!important;object-fit:contain!important;object-position:center!important}
.catalog-row .catalog-image span{color:#7a8790;font-size:.76rem;line-height:1.35;text-align:center}
.catalog-pagination{display:flex;align-items:center;justify-content:center;gap:7px;margin:30px 0 0;flex-wrap:wrap}
.catalog-pagination[hidden]{display:none}
.catalog-pagination button{min-width:38px;height:38px;border:1px solid #b9ceda;border-radius:5px;background:#fff;padding:0 12px;color:var(--blue2);font:inherit;font-size:.78rem;font-weight:700;cursor:pointer}
.catalog-pagination button:hover:not(:disabled){border-color:var(--blue);background:#edf7fc}
.catalog-pagination button[aria-current="page"]{border-color:var(--blue);background:var(--blue);color:#fff}
.catalog-pagination button:disabled{cursor:not-allowed;opacity:.42}
.pagination-ellipsis{padding:0 3px;color:#71818b}
.taxonomy-card{overflow:hidden}
.taxonomy-card-image{width:calc(100% + 34px);height:92px;margin:-17px -17px 14px;object-fit:cover;border-bottom:1px solid var(--line)}
.taxonomy-card small{display:-webkit-box;overflow:hidden;-webkit-box-orient:vertical;-webkit-line-clamp:3}
.category-detail-hero{padding:42px 0;background:#eef7fc;border-bottom:1px solid #d6e8f2}
.category-detail-grid{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(380px,.95fr);gap:36px;align-items:center}
.category-back{display:inline-block;margin-bottom:24px;color:var(--blue2);font-size:.78rem;font-weight:700}
.category-detail-copy h1{margin:7px 0 14px;color:#173b50;font-size:clamp(2rem,4vw,3rem);line-height:1.1}
.category-detail-copy>p{max-width:720px;margin:0;color:#465e6b;font-size:1rem;line-height:1.7}
.category-facts{display:flex;gap:10px;flex-wrap:wrap;margin-top:20px}
.category-facts span{border:1px solid #b9dceb;border-radius:4px;background:#fff;padding:8px 11px;color:#365b70;font-size:.76rem;font-weight:650}
.category-facts strong{color:var(--blue2)}
.category-evidence-note{display:grid;grid-template-columns:105px 1fr;gap:12px;margin-top:18px;border-left:4px solid var(--blue);background:rgba(255,255,255,.82);padding:12px 14px}
.category-evidence-note strong{color:#173b50;font-size:.76rem}
.category-evidence-note span{color:#5f727e;font-size:.72rem;line-height:1.5}
.category-hero-image{height:300px;margin:0;overflow:hidden;border:1px solid #bcd9e8;border-radius:7px;background:#fff;box-shadow:0 10px 28px rgba(25,62,84,.1)}
.category-hero-image img{display:block;width:100%;height:100%;object-fit:cover}
.category-products-intro{padding:34px 0 0;background:#fff}
.category-products-intro>.wrap{display:grid;grid-template-columns:minmax(260px,.7fr) minmax(360px,1.3fr);gap:20px 34px;align-items:end}
.category-products-intro h2{margin:4px 0 0;color:#173b50;font-size:1.55rem}
.category-products-intro .result-count{grid-column:1/-1;margin-top:0;padding-top:14px;border-top:1px solid var(--line)}
.category-catalog-search{grid-template-columns:1fr auto;margin-top:0}
.category-catalog-search .btn{display:flex;align-items:center;justify-content:center;white-space:nowrap}
.category-catalog-section{padding-top:22px}
@media(max-width:900px){.catalog-table-head{display:none}.catalog-row{grid-template-columns:125px minmax(0,1fr) 180px;grid-template-areas:"cat product image" "application application image";row-gap:14px}.catalog-catno{grid-area:cat}.catalog-product{grid-area:product}.catalog-application{grid-area:application}.catalog-row .catalog-image{grid-area:image;height:145px}.catalog-description-toggle{margin-left:0}}
@media(max-width:900px){.category-detail-grid,.catalog-introduction-grid,.category-science-grid,.innovation-partnership-card{grid-template-columns:1fr}.category-hero-image{height:260px}.category-products-intro>.wrap{grid-template-columns:1fr}.category-products-intro .result-count{grid-column:auto}}
@media(max-width:640px){.innovation-partnership-card{padding:24px 20px}.innovation-partnership{padding-bottom:36px}}
@media(max-width:640px){.catalog-section{padding-top:18px}.catalog-row{grid-template-columns:105px minmax(0,1fr);grid-template-areas:"cat product" "application application" "image image";min-height:0;padding:19px 4px;column-gap:12px}.catalog-row .catalog-image{height:155px;margin-top:2px}.catalog-application p{font-size:.9rem}.catalog-featured{font-size:.75rem}.catalog-pagination{display:flex!important}.catalog-pagination button{min-width:35px;height:36px;padding:0 9px}.category-detail-hero{padding:28px 0}.category-hero-image{height:190px}.category-detail-copy>p{font-size:.94rem}.category-evidence-note{grid-template-columns:1fr}.category-catalog-search{grid-template-columns:1fr}.taxonomy-card-image{height:105px}}

/* Literature formulation component links and optional supporting-component set. */
.formulation-component-link{color:var(--blue2);font-weight:750;text-decoration:underline;text-decoration-color:#8fc6e1;text-underline-offset:.17em}
.formulation-component-link:hover{color:#064d79;text-decoration-thickness:2px}
.formulation-set{margin-top:13px;border:1px solid #b9dceb;border-radius:6px;background:#f4fafd;padding:12px 13px}
.formulation-set-choice{display:grid;grid-template-columns:auto minmax(0,1fr) auto;gap:10px;align-items:center;color:var(--ink);cursor:pointer}
.formulation-set-choice input{width:18px;height:18px;margin:0;accent-color:var(--blue)}
.formulation-set-choice span{display:grid;line-height:1.35}
.formulation-set-choice strong{color:#173b51;font-size:.82rem}
.formulation-set-choice small{margin-top:2px;color:#617581;font-size:.7rem}
.formulation-set-choice b{color:#a43b20;font-size:.8rem;white-space:nowrap}
.formulation-set-components{display:grid;grid-template-columns:auto 1fr;gap:8px;margin:10px 0 0 28px;padding-top:9px;border-top:1px solid #d5e6ee;color:#4f6572;font-size:.72rem}
.formulation-set-components>span{font-weight:750;color:#365b70}
.formulation-set-components>div{display:flex;gap:7px;align-items:center;flex-wrap:wrap}
.formulation-set-components small{color:#6b7d88}
.formulation-set-separator{color:#8ca1ad}
.formulation-set>p{margin:8px 0 0 28px;color:#6b7d88;font-size:.66rem;line-height:1.45}
@media(max-width:640px){.formulation-set-choice{grid-template-columns:auto 1fr}.formulation-set-choice b{grid-column:2}.formulation-set-components{grid-template-columns:1fr}.formulation-set-components,.formulation-set>p{margin-left:28px}}

#catalog-search-form{grid-template-columns:minmax(0,1fr) auto}
#catalog-search-form input{min-width:0}
#catalog-search-form .catalog-search-submit{min-width:120px;border-radius:5px;justify-content:center}
#catalog-search-form .catalog-search-submit:focus-visible{outline:3px solid #075d91;outline-offset:3px}
@media(max-width:640px){#catalog-search-form .catalog-search-submit{min-width:88px;padding-inline:16px}}

.catalog-page.search-results-active .catalog-introduction,
.catalog-page.search-results-active .innovation-partnership,
.catalog-page.search-results-active .category-science-introduction{display:none}

/* Availability is shown only when confirmed in the current commercial snapshot. */
.stock-availability{color:#177a50;font-size:.84rem;font-weight:700;margin:0 0 12px}
header .headerin>nav{flex-wrap:wrap;row-gap:0}
header .headerin{height:auto;min-height:72px;padding-block:6px}

/* Per-line removal in both catalog and custom-product carts. */
.cart-remove{display:inline-flex;align-items:center;justify-content:center;align-self:flex-start;width:auto;min-height:36px;margin-top:10px;padding:6px 12px;border:1px solid #cfb5b5;border-radius:5px;background:#fff;color:#a42626;font:inherit;font-size:14px;font-weight:650;cursor:pointer}
.cart-remove:hover{background:#fff1f1;border-color:#a42626}
.cart-remove:focus-visible{outline:2px solid #087fbe;outline-offset:3px}
.cartitem-actions{display:flex;flex-direction:column;align-items:flex-start;flex-shrink:0}

.cart-quantity{display:flex;align-items:center;gap:10px;margin-top:10px;flex-wrap:wrap}.cart-quantity button{min-width:44px;min-height:44px;border:1px solid #a9c9db;border-radius:5px;background:#fff;color:#16435a;font:inherit;font-size:20px;cursor:pointer}.cart-quantity button:disabled{opacity:.4;cursor:default}.cart-quantity button:focus-visible{outline:2px solid #087fbe;outline-offset:2px}.cart-quantity output{font-size:16px;min-width:20px;text-align:center}