/* SZFUNTOY — static B2B STEM catalogue
   Design values see DESIGN.md. No external fonts, no build step. */

:root{
  --paper:#F7F7F3; --surface:#FFFFFF; --ink:#12203A; --body:#3F4B60; --muted:#6C7689;
  --line:#DCE1E8; --line-2:#B9C2CE; --blue:#1452CC; --blue-dark:#0D3BA0; --blue-soft:#EAF0FE;
  --orange:#E4551A; --amber:#FFF4E8; --red:#B42318; --red-soft:#FEF3F2;
  --green:#2F6B4F; --green-soft:#EAF4EE; --slate:#475569;
  --radius:3px; --max:1200px; --gut:24px; --mono:ui-monospace,SFMono-Regular,Menlo,Consolas,"Liberation Mono",monospace;
  --sans:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}

*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--paper);color:var(--body);font-family:var(--sans);font-size:16px;line-height:1.62;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
button,input,select,textarea{font:inherit;color:inherit}
h1,h2,h3,h4{color:var(--ink);line-height:1.18;letter-spacing:-.022em;margin:0}
p{margin:0 0 1em}
p:last-child{margin-bottom:0}
ul,ol{margin:0 0 1em;padding-left:1.2em}
:focus-visible{outline:2px solid var(--blue);outline-offset:3px;border-radius:1px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.skip-link{position:absolute;top:-60px;left:12px;z-index:200;background:var(--ink);color:#fff;padding:10px 16px;border-radius:var(--radius)}
.skip-link:focus{top:10px;color:#fff}
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--gut)}
.mono{font-family:var(--mono);font-size:.82em;letter-spacing:.02em}
.eyebrow{font-family:var(--mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);font-weight:600;margin-bottom:14px}
.section-num{font-family:var(--mono);font-size:.75rem;letter-spacing:.1em;color:var(--muted)}
.divider{height:1px;background:var(--line);border:0;margin:0}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(6px)}
.header-inner{display:flex;align-items:center;gap:28px;min-height:74px}
.brand{display:flex;align-items:center;gap:11px;flex:none;color:var(--ink)}
.brand:hover{text-decoration:none}
.brand-mark{width:34px;height:34px;flex:none}
.brand-text{font-weight:800;font-size:1.06rem;letter-spacing:.055em;line-height:1}
.brand-sub{display:block;font-family:var(--mono);font-size:.6rem;letter-spacing:.13em;color:var(--muted);font-weight:400;margin-top:5px;text-transform:uppercase}
.nav{display:flex;align-items:center;gap:26px;margin-left:auto}
.nav a{color:var(--body);font-size:.9rem;font-weight:550;white-space:nowrap;padding:6px 0;border-bottom:2px solid transparent}
.nav a:hover,.nav a[aria-current="page"]{color:var(--ink);border-bottom-color:var(--blue);text-decoration:none}
.header-actions{display:flex;align-items:center;gap:12px;margin-left:8px}
.inquiry-badge{display:none;min-width:20px;height:20px;padding:0 5px;border-radius:10px;background:var(--orange);color:#fff;font-family:var(--mono);font-size:.7rem;line-height:20px;text-align:center;font-weight:700}
.inquiry-badge.is-on{display:inline-block}
.nav-toggle{display:none;background:none;border:1px solid var(--line-2);border-radius:var(--radius);width:40px;height:38px;cursor:pointer;align-items:center;justify-content:center}
.nav-toggle span{display:block;width:18px;height:2px;background:var(--ink);position:relative}
.nav-toggle span::before,.nav-toggle span::after{content:"";position:absolute;left:0;width:18px;height:2px;background:var(--ink)}
.nav-toggle span::before{top:-6px}.nav-toggle span::after{top:6px}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;padding:12px 20px;border:1px solid transparent;border-radius:var(--radius);font-size:.9rem;font-weight:650;cursor:pointer;text-align:center;transition:background .18s ease,color .18s ease,border-color .18s ease,transform .18s ease;text-decoration:none;white-space:nowrap}
.btn:hover{text-decoration:none;transform:translateY(-1px)}
.btn-primary{background:var(--blue);color:#fff;border-color:var(--blue)}
.btn-primary:hover{background:var(--blue-dark);border-color:var(--blue-dark);color:#fff}
.btn-outline{background:transparent;color:var(--ink);border-color:var(--line-2)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-dark{background:var(--ink);color:#fff;border-color:var(--ink)}
.btn-dark:hover{background:#203456;color:#fff}
.btn-small{padding:8px 13px;font-size:.8rem}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}
.btn-row{display:flex;flex-wrap:wrap;gap:12px;margin-top:26px}

/* ---------- hero ---------- */
.hero{border-bottom:1px solid var(--line);background:linear-gradient(180deg,#FFFFFF 0%,var(--paper) 100%)}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:64px;align-items:center;padding:74px var(--gut) 78px}
.display{font-size:clamp(2.35rem,4.6vw,3.9rem);font-weight:780;letter-spacing:-.04em;max-width:17ch}
.display em{font-style:normal;color:var(--blue)}
.lede{font-size:1.075rem;line-height:1.7;max-width:54ch;margin-top:20px;color:var(--body)}
.hero-facts{display:flex;flex-wrap:wrap;gap:10px 26px;margin-top:28px;font-family:var(--mono);font-size:.74rem;letter-spacing:.04em;color:var(--muted);text-transform:uppercase}
.hero-facts span{display:flex;align-items:center;gap:7px}
.hero-facts span::before{content:"";width:6px;height:6px;background:var(--orange);border-radius:50%}
.specimen{position:relative;background:#fff;border:1px solid var(--line);padding:22px;box-shadow:0 1px 0 rgba(18,32,58,.04)}
.specimen::before,.specimen::after{content:"";position:absolute;width:14px;height:14px;border:1px solid var(--line-2)}
.specimen::before{top:-1px;left:-1px;border-right:0;border-bottom:0}
.specimen::after{bottom:-1px;right:-1px;border-left:0;border-top:0}
.specimen-frame{background:#fff;border:1px solid var(--line);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;overflow:hidden;position:relative}
.specimen-frame img{width:100%;height:100%;object-fit:contain}
.specimen-cap{display:flex;justify-content:space-between;gap:12px;border-top:1px solid var(--line);margin-top:16px;padding-top:12px;font-family:var(--mono);font-size:.7rem;letter-spacing:.05em;color:var(--muted);text-transform:uppercase;flex-wrap:wrap}
.specimen-cap b{color:var(--ink);font-weight:600}
.annotation{position:absolute;z-index:3;font-family:var(--mono);font-size:.66rem;letter-spacing:.04em;color:var(--blue);background:#fff;border:1px solid var(--blue-soft);padding:3px 7px;line-height:1.3}
.annotation.a1{top:9%;left:4%}.annotation.a2{bottom:11%;right:3%}

/* ---------- data strip ---------- */
.data-strip{display:grid;grid-template-columns:repeat(4,1fr);border-bottom:1px solid var(--line);background:#fff}
.data-item{padding:22px var(--gut);border-right:1px solid var(--line)}
.data-item:last-child{border-right:0}
.data-num{font-family:var(--mono);font-size:1.55rem;font-weight:700;color:var(--ink);letter-spacing:-.03em;line-height:1.1}
.data-label{font-size:.76rem;color:var(--muted);margin-top:5px;letter-spacing:.02em}

/* ---------- sections ---------- */
.section{padding:76px 0;border-bottom:1px solid var(--line)}
.section.alt{background:#fff}
.section-head{display:grid;grid-template-columns:120px minmax(0,1fr);gap:24px;margin-bottom:40px}
.section-title{font-size:clamp(1.65rem,2.7vw,2.3rem);font-weight:740}
.section-intro{color:var(--body);max-width:70ch;margin-top:12px;font-size:1rem}

/* ---------- task cards ---------- */
.task-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.task-card{background:#fff;border:1px solid var(--line);padding:28px 26px;display:flex;flex-direction:column;min-height:210px;transition:border-color .18s ease,transform .18s ease}
.task-card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.task-card .num{font-family:var(--mono);font-size:.74rem;color:var(--orange);letter-spacing:.1em}
.task-card h3{font-size:1.16rem;margin:14px 0 10px}
.task-card p{font-size:.92rem;flex:1}
.task-card a{font-size:.85rem;font-weight:650;margin-top:8px;align-self:flex-start}

/* ---------- theme tiles ---------- */
.theme-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.theme-tile{background:#fff;border:1px solid var(--line);padding:20px;display:flex;align-items:center;gap:16px;color:var(--ink);transition:border-color .18s ease,transform .18s ease}
.theme-tile:hover{border-color:var(--line-2);transform:translateY(-2px);text-decoration:none}
.theme-icon{width:46px;height:46px;flex:none;display:flex;align-items:center;justify-content:center;background:var(--paper);border:1px solid var(--line)}
.theme-icon svg{width:30px;height:30px}
.theme-text strong{display:block;font-size:.96rem}
.theme-text small{display:block;color:var(--muted);font-size:.78rem;margin-top:3px}
.theme-count{margin-left:auto;font-family:var(--mono);font-size:.78rem;color:var(--muted)}

/* ---------- product cards ---------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.product-card{background:#fff;border:1px solid var(--line);display:flex;flex-direction:column;transition:border-color .18s ease,transform .18s ease}
.product-card:hover{border-color:var(--line-2);transform:translateY(-2px)}
.card-media{position:relative;aspect-ratio:4/3;background:#fff;border-bottom:1px solid var(--line);overflow:hidden;display:flex;align-items:center;justify-content:center}
.card-media img{width:100%;height:100%;object-fit:contain;padding:12px}
.theme-plate{position:relative;width:100%;height:100%;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;background-color:#FBFCFD;background-image:linear-gradient(var(--line) 1px,transparent 1px),linear-gradient(90deg,var(--line) 1px,transparent 1px);background-size:24px 24px;background-position:center;color:var(--theme,var(--blue))}
.theme-plate::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 50% 45%,rgba(255,255,255,.94),rgba(255,255,255,.35) 70%);pointer-events:none}
.theme-plate svg{width:82px;height:82px;position:relative;z-index:1;opacity:.9}
.plate-tag{position:relative;z-index:1;font-family:var(--mono);font-size:.64rem;letter-spacing:.08em;text-transform:uppercase;color:var(--muted);background:rgba(255,255,255,.92);border:1px solid var(--line);padding:3px 8px}
.photo-tag{position:absolute;top:10px;left:10px;z-index:2;font-family:var(--mono);font-size:.62rem;letter-spacing:.06em;text-transform:uppercase;background:var(--green-soft);color:var(--green);border:1px solid #CDE3D6;padding:3px 7px}
.card-body{padding:18px 19px 16px;display:flex;flex-direction:column;flex:1;gap:9px}
.chips{display:flex;gap:7px;flex-wrap:wrap;align-items:center}
.chip{font-family:var(--mono);font-size:.65rem;letter-spacing:.05em;text-transform:uppercase;padding:3px 7px;border:1px solid var(--line);color:var(--muted);background:var(--paper)}
.chip.theme{border-color:transparent;color:#fff;background:var(--theme,var(--blue))}
.ref-code{font-family:var(--mono);font-size:.72rem;color:var(--muted);letter-spacing:.06em}
.card-title{font-size:1.03rem;font-weight:700;line-height:1.35;color:var(--ink)}
.product-card a.card-title:hover{color:var(--blue)}
.card-focus{font-size:.84rem;color:var(--body);line-height:1.55;flex:1}
.card-meta{display:flex;gap:8px;flex-wrap:wrap;font-family:var(--mono);font-size:.68rem;color:var(--muted);border-top:1px solid var(--line);padding-top:10px;margin-top:2px}
.card-meta span+span::before{content:"·";margin-right:8px}
.card-actions{display:flex;gap:8px;align-items:center;margin-top:6px;flex-wrap:wrap}
.card-actions .btn{flex:1;min-width:88px}
.compare-label{display:flex;align-items:center;gap:5px;font-size:.72rem;color:var(--muted);cursor:pointer;white-space:nowrap}
.compare-label input{accent-color:var(--blue);width:15px;height:15px;cursor:pointer}

/* ---------- callouts / steps ---------- */
.callout{border:1px solid var(--line);background:#fff;padding:24px 26px;border-left:3px solid var(--blue)}
.callout.warn{background:var(--amber);border-color:#F3D9BC;border-left-color:var(--orange)}
.callout.info{background:var(--blue-soft);border-color:#D3E0FA}
.callout h3{font-size:1.05rem;margin-bottom:8px}
.callout p{font-size:.9rem;margin-bottom:0}
.fact-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-top:0}
.fact{background:#fff;border:1px solid var(--line);padding:22px 20px}
.fact b{display:block;font-family:var(--mono);font-size:.72rem;letter-spacing:.09em;text-transform:uppercase;color:var(--blue);margin-bottom:10px}
.fact h3{font-size:.98rem;margin-bottom:8px}
.fact p{font-size:.84rem;line-height:1.55;margin:0}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:0;border:1px solid var(--line);background:#fff}
.step{padding:24px;border-right:1px solid var(--line)}
.step:last-child{border-right:0}
.step-num{font-family:var(--mono);font-size:.76rem;color:var(--orange);letter-spacing:.08em}
.step h3{font-size:1rem;margin:12px 0 8px}
.step p{font-size:.85rem;margin:0}

/* ---------- page head / breadcrumb ---------- */
.page-head{background:#fff;border-bottom:1px solid var(--line);padding:50px 0 44px}
.page-head h1{font-size:clamp(1.9rem,3.4vw,2.8rem);font-weight:760;margin-top:10px}
.page-head .lede{margin-top:16px;max-width:76ch}
.breadcrumb{display:flex;flex-wrap:wrap;gap:8px;align-items:center;font-family:var(--mono);font-size:.72rem;color:var(--muted);margin-bottom:20px}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb span::before{content:"/";margin-right:8px;color:var(--line-2)}
.breadcrumb span:first-child::before{display:none}

/* ---------- catalog ---------- */
.catalog-layout{display:grid;grid-template-columns:264px minmax(0,1fr);gap:32px;padding-top:38px;padding-bottom:70px}
.filters{align-self:start;position:sticky;top:96px;background:#fff;border:1px solid var(--line);padding:22px}
.filter-group{padding-bottom:20px;margin-bottom:20px;border-bottom:1px solid var(--line)}
.filter-group:last-of-type{border-bottom:0;margin-bottom:10px}
.filter-title{font-family:var(--mono);font-size:.7rem;letter-spacing:.1em;text-transform:uppercase;color:var(--ink);font-weight:700;margin-bottom:12px;display:block}
.filter-input,.sort-select{width:100%;padding:9px 11px;border:1px solid var(--line-2);border-radius:var(--radius);background:#fff;font-size:.86rem}
.filter-input:focus,.sort-select:focus{border-color:var(--blue)}
.filter-option{display:flex;align-items:center;gap:9px;font-size:.84rem;padding:5px 0;cursor:pointer;color:var(--body)}
.filter-option input{accent-color:var(--blue);width:15px;height:15px;flex:none;cursor:pointer}
.filter-option .c{margin-left:auto;font-family:var(--mono);font-size:.7rem;color:var(--muted)}
.filter-reset{width:100%;font-size:.82rem}
.results-bar{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:18px}
.results-count{font-family:var(--mono);font-size:.78rem;color:var(--muted);letter-spacing:.04em}
.results-count b{color:var(--ink)}
.results-tools{display:flex;align-items:center;gap:9px}
.results-tools label{font-size:.8rem;color:var(--muted)}
.results-tools .sort-select{width:auto;min-width:170px}
.no-results{display:none;background:#fff;border:1px dashed var(--line-2);padding:52px 28px;text-align:center}
.no-results.is-on{display:block}
.no-results h3{margin-bottom:10px}
.catalog-note{font-size:.82rem;color:var(--muted);margin-top:26px;border-top:1px solid var(--line);padding-top:18px}

/* compare tray + modal */
.compare-tray{position:fixed;left:0;right:0;bottom:0;z-index:70;background:var(--ink);color:#fff;border-top:1px solid #2B3E5C;transform:translateY(105%);transition:transform .2s ease}
.compare-tray.is-on{transform:translateY(0)}
.tray-inner{max-width:var(--max);margin:0 auto;padding:14px var(--gut);display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.tray-inner .t-count{font-family:var(--mono);font-size:.8rem;color:#B9C8E0}
.tray-inner .t-list{flex:1;font-size:.82rem;color:#DCE5F2;min-width:160px}
.compare-modal{position:fixed;inset:0;z-index:100;display:none;align-items:center;justify-content:center;padding:20px;background:rgba(12,24,42,.6)}
.compare-modal.is-on{display:flex}
.modal-box{background:#fff;width:min(1040px,100%);max-height:88vh;overflow:auto;border:1px solid var(--line);padding:26px}
.modal-head{display:flex;justify-content:space-between;align-items:flex-start;gap:16px;margin-bottom:20px}
.modal-head h2{font-size:1.4rem}
.modal-close{background:none;border:1px solid var(--line-2);width:34px;height:34px;cursor:pointer;font-size:1.1rem;line-height:1}
.compare-table{width:100%;border-collapse:collapse;font-size:.84rem}
.compare-table th,.compare-table td{border:1px solid var(--line);padding:11px 12px;text-align:left;vertical-align:top}
.compare-table th{background:var(--paper);font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:600;width:150px}
.compare-table thead th{color:var(--ink);font-weight:700}

/* ---------- product detail ---------- */
.detail-wrap{padding-top:38px;padding-bottom:76px}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:52px;align-items:start}
.gallery-main{background:#fff;border:1px solid var(--line);aspect-ratio:1/1;display:flex;align-items:center;justify-content:center;position:relative;overflow:hidden}
.gallery-main img{width:100%;height:100%;object-fit:contain;padding:22px}
.gallery-thumbs{display:flex;gap:9px;margin-top:10px;flex-wrap:wrap}
.gallery-thumbs button{width:76px;height:76px;padding:5px;background:#fff;border:1px solid var(--line);cursor:pointer}
.gallery-thumbs button[aria-pressed="true"]{border-color:var(--blue);box-shadow:inset 0 0 0 1px var(--blue)}
.gallery-thumbs img{width:100%;height:100%;object-fit:contain}
.detail-info h1{font-size:clamp(1.7rem,2.9vw,2.4rem);font-weight:750;margin:12px 0 14px}
.detail-lead{font-size:1rem;line-height:1.68}
.spec-table{width:100%;border-collapse:collapse;margin-top:22px;font-size:.87rem}
.spec-table th,.spec-table td{border-bottom:1px solid var(--line);padding:10px 0;text-align:left;vertical-align:top}
.spec-table th{width:37%;font-family:var(--mono);font-size:.72rem;letter-spacing:.05em;text-transform:uppercase;color:var(--muted);font-weight:600;padding-right:14px}
.spec-table td{color:var(--ink)}
.detail-section{margin-top:66px}
.detail-section h2{font-size:1.45rem;margin-bottom:18px}
.detail-cols{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.plain-card{background:#fff;border:1px solid var(--line);padding:26px}
.plain-card h3{font-size:1.05rem;margin-bottom:12px}
.plain-card ul{margin:0;padding-left:1.15em;font-size:.89rem}
.plain-card li{margin-bottom:7px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.pill{display:inline-block;font-family:var(--mono);font-size:.68rem;letter-spacing:.05em;text-transform:uppercase;padding:3px 8px;border:1px solid var(--line);background:#fff;color:var(--muted)}
.pill.ok{background:var(--green-soft);border-color:#CDE3D6;color:var(--green)}
.pill.pending{background:var(--amber);border-color:#F3D9BC;color:#8A4B12}
.pill.none{background:var(--red-soft);border-color:#F4C9C4;color:var(--red)}

/* ---------- long-form compliance / about ---------- */
.prose{max-width:860px}
.prose h2{font-size:1.5rem;margin:52px 0 14px;padding-top:26px;border-top:1px solid var(--line)}
.prose h2:first-child{border-top:0;padding-top:0;margin-top:0}
.prose h3{font-size:1.08rem;margin:26px 0 10px}
.prose p,.prose li{font-size:.94rem;line-height:1.72}
.prose ul{padding-left:1.2em}
.prose li{margin-bottom:7px}
.prose code{font-family:var(--mono);font-size:.86em;background:var(--paper);padding:1px 5px;border:1px solid var(--line)}
.data-table{width:100%;border-collapse:collapse;margin:18px 0 26px;font-size:.86rem;background:#fff}
.data-table th,.data-table td{border:1px solid var(--line);padding:12px 14px;text-align:left;vertical-align:top}
.data-table thead th{background:var(--ink);color:#fff;font-family:var(--mono);font-size:.7rem;letter-spacing:.08em;text-transform:uppercase;font-weight:600}
.data-table tbody th{background:var(--paper);font-weight:650;color:var(--ink);width:27%}
.data-table td small{display:block;color:var(--muted);margin-top:4px;font-size:.78rem}
.source-list{font-size:.84rem;color:var(--muted);line-height:1.9}
.source-list a{word-break:break-word}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.note-box{background:#fff;border:1px solid var(--line);border-left:3px solid var(--orange);padding:20px 22px;font-size:.88rem}

/* ---------- contact ---------- */
.contact-layout{display:grid;grid-template-columns:.85fr 1.15fr;gap:44px;padding-top:44px;padding-bottom:80px;align-items:start}
.contact-card{background:#fff;border:1px solid var(--line);padding:28px;margin-bottom:18px}
.contact-card h2{font-size:1.2rem;margin-bottom:16px}
.contact-row{display:grid;grid-template-columns:110px 1fr;gap:12px;padding:10px 0;border-bottom:1px solid var(--line);font-size:.88rem}
.contact-row:last-child{border-bottom:0}
.contact-row dt{font-family:var(--mono);font-size:.7rem;letter-spacing:.06em;text-transform:uppercase;color:var(--muted);padding-top:3px}
.contact-row dd{margin:0;color:var(--ink)}
.form-panel{background:#fff;border:1px solid var(--line);padding:30px}
.form-panel h2{font-size:1.3rem;margin-bottom:6px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:22px}
.form-field{display:flex;flex-direction:column;gap:6px}
.form-field.full{grid-column:1/-1}
.form-field label{font-size:.8rem;font-weight:650;color:var(--ink)}
.form-field label .req{color:var(--orange)}
.form-field input,.form-field select,.form-field textarea{padding:10px 11px;border:1px solid var(--line-2);border-radius:var(--radius);background:#fff;font-size:.88rem;width:100%}
.form-field textarea{min-height:110px;resize:vertical}
.form-field .hint{font-size:.73rem;color:var(--muted)}
.form-field.has-error input,.form-field.has-error select,.form-field.has-error textarea{border-color:var(--red);background:var(--red-soft)}
.field-error{font-size:.76rem;color:var(--red);display:none}
.form-field.has-error .field-error{display:block}
.form-error-summary{display:none;background:var(--red-soft);border:1px solid #F4C9C4;color:var(--red);padding:12px 14px;font-size:.85rem;margin-top:18px}
.form-error-summary.is-on{display:block}
.inquiry-list{border:1px solid var(--line);background:var(--paper);padding:16px;margin-top:22px}
.inquiry-list h3{font-size:.94rem;margin-bottom:10px}
.inq-item{display:flex;align-items:center;gap:10px;padding:8px 0;border-bottom:1px solid var(--line);font-size:.84rem;flex-wrap:wrap}
.inq-item:last-child{border-bottom:0}
.inq-item .i-ref{font-family:var(--mono);color:var(--blue);min-width:74px}
.inq-item .i-name{flex:1;min-width:180px;color:var(--ink)}
.qty-input{width:76px;padding:5px 7px;border:1px solid var(--line-2);border-radius:var(--radius);font-size:.8rem}
.inq-remove{background:none;border:0;color:var(--muted);cursor:pointer;font-size:1.05rem;line-height:1;padding:2px 6px}
.inq-remove:hover{color:var(--red)}
.inq-empty{font-size:.84rem;color:var(--muted)}
.inquiry-output{display:none;margin-top:24px;border:1px solid var(--green);background:var(--green-soft);padding:20px}
.inquiry-output.is-on{display:block}
.inquiry-output h3{font-size:1.05rem;color:var(--green);margin-bottom:8px}
.inquiry-output textarea{width:100%;min-height:190px;border:1px solid #CDE3D6;background:#fff;padding:12px;font-family:var(--mono);font-size:.78rem;line-height:1.55;resize:vertical}
.output-status{font-size:.82rem;margin-top:10px;color:var(--ink)}

/* ---------- footer ---------- */
.site-footer{background:#101B2F;color:#C3CCDA;padding:58px 0 24px}
.footer-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:36px;border-bottom:1px solid #263650}
.site-footer h3{color:#fff;font-size:.78rem;font-family:var(--mono);letter-spacing:.12em;text-transform:uppercase;margin-bottom:16px;font-weight:600}
.site-footer p,.site-footer li{font-size:.85rem;line-height:1.7;margin:0 0 8px}
.site-footer ul{list-style:none;padding:0;margin:0}
.site-footer a{color:#C3CCDA}
.site-footer a:hover{color:#fff}
.footer-brand{color:#fff;font-weight:800;font-size:1.05rem;letter-spacing:.06em}
.footer-note{font-size:.76rem;color:#8593A9;padding-top:22px;line-height:1.7}

/* ---------- responsive ---------- */
@media (max-width:1180px){
  .nav{gap:16px}
  .header-cta{font-size:.8rem;padding:8px 12px}
}
@media (max-width:1040px){
  .hero-grid{gap:36px;padding:56px var(--gut)}
  .product-grid,.theme-grid,.task-grid,.related-grid{grid-template-columns:repeat(2,1fr)}
  .fact-grid,.steps{grid-template-columns:repeat(2,1fr)}
  .step:nth-child(2){border-right:0}.step:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .data-strip{grid-template-columns:repeat(2,1fr)}
  .data-item:nth-child(2){border-right:0}.data-item:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .footer-grid{grid-template-columns:repeat(2,1fr)}
  .catalog-layout{grid-template-columns:220px minmax(0,1fr);gap:22px}
}
@media (max-width:820px){
  .nav{position:absolute;top:74px;left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;background:#fff;border-bottom:1px solid var(--line);padding:8px var(--gut) 18px}
  .nav.is-open{display:flex}
  .nav a{padding:12px 0;border-bottom:1px solid var(--line)}
  .header-actions{margin-left:auto}
  .nav-toggle{display:flex}
  .hero-grid,.detail-grid,.contact-layout{grid-template-columns:1fr;gap:34px}
  .specimen{max-width:520px}
  .section-head{grid-template-columns:1fr;gap:8px}
  .catalog-layout{grid-template-columns:1fr;padding-top:24px}
  .filters{position:static}
  .filter-group{padding-bottom:14px;margin-bottom:14px}
  .filter-options{display:grid;grid-template-columns:repeat(2,1fr);gap:0 16px}
  .detail-cols,.two-col{grid-template-columns:1fr}
  .data-table tbody th{width:auto}
}
@media (max-width:480px){
  .header-inner{gap:10px}
  .header-actions{margin-left:0}
  .header-cta{display:none}
}
@media (max-width:620px){
  body{font-size:15px}
  .wrap{padding:0 18px}
  .section{padding:52px 0}
  .hero-grid{padding:42px 18px 48px}
  .display{font-size:2.15rem}
  .product-grid,.theme-grid,.task-grid,.related-grid,.fact-grid,.steps,.form-grid{grid-template-columns:1fr}
  .step{border-right:0;border-bottom:1px solid var(--line)}
  .step:last-child{border-bottom:0}
  .data-strip{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr;gap:26px}
  .btn-row{flex-direction:column;align-items:stretch}
  .btn-row .btn{width:100%}
  .contact-row{grid-template-columns:1fr;gap:2px}
  .data-table,.compare-table{display:block;overflow-x:auto;white-space:normal}
  .data-table th,.data-table td,.compare-table th,.compare-table td{min-width:120px}
  .compare-table th{width:auto}
  .tray-inner{gap:10px}
  .tray-inner .t-list{order:3;width:100%}
}
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.01ms !important;transition-duration:.01ms !important;scroll-behavior:auto !important}
}
@media print{
  .site-header,.site-footer,.compare-tray,.btn,.filters,nav{display:none !important}
  body{background:#fff}
}