/*
Theme Name: Zhengteng Industrial
Theme URI: https://zhengteng-tech.com/
Author: Zhengteng Tech
Description: A lightweight B2B industrial instrumentation theme with hierarchical product groups and product detail pages.
Version: 1.2.0
Requires at least: 6.5
Requires PHP: 8.0
Text Domain: zhengteng-industrial
*/
:root{--navy:#0d3439;--teal:#0f817d;--teal-dark:#096963;--ink:#102b2f;--muted:#54696c;--line:#dce5e3;--subtle:#f3f7f6;--white:#fff;--shell:1240px;--radius:6px;--shadow:0 10px 30px rgba(8,40,44,.1)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fff;font:400 1rem/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Arial,sans-serif}a{color:inherit;text-decoration:none}img{max-width:100%;height:auto;display:block}button,input,textarea{font:inherit}.shell{width:min(calc(100% - 40px),var(--shell));margin-inline:auto}.skip-link{position:fixed;left:16px;top:-100px;z-index:1000;padding:10px 16px;color:#fff;background:var(--teal)}.skip-link:focus{top:16px}:focus-visible{outline:2px solid var(--teal);outline-offset:3px}
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.nav-wrap{min-height:80px;display:flex;align-items:center;justify-content:space-between;gap:32px}.brand{display:flex;align-items:center;gap:12px}.brand-mark{width:44px;height:44px;display:grid;place-items:center;color:#fff;background:var(--navy);font-weight:700;clip-path:polygon(50% 0,100% 100%,0 100%)}.brand strong{display:block;max-width:230px;font-size:.94rem;letter-spacing:.08em;text-transform:uppercase}.brand small{display:block;color:var(--muted);font-size:.62rem;letter-spacing:.16em}.custom-logo{max-height:54px;width:auto}.site-nav-list{display:flex;align-items:center;gap:32px;margin:0;padding:0;list-style:none}.site-nav a{font-size:.9rem;font-weight:700}.site-nav a:hover{color:var(--teal)}.site-nav .nav-cta{display:inline-flex;min-height:44px;align-items:center;padding:0 20px;color:#fff;background:var(--teal);border-radius:var(--radius)}.menu-toggle{display:none;width:44px;height:44px;padding:10px;background:transparent;border:1px solid var(--line);border-radius:var(--radius)}.menu-toggle span:not(.screen-reader-text){display:block;height:2px;margin:5px 0;background:var(--ink)}.screen-reader-text{position:absolute!important;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
.hero-section{padding:72px 0;background:linear-gradient(115deg,#f1f6f5 0%,#fff 55%)}.hero-grid{display:grid;grid-template-columns:minmax(0,.9fr) minmax(420px,1.1fr);gap:64px;align-items:center}.eyebrow{margin:0 0 16px;color:var(--teal);font-size:.76rem;font-weight:700;letter-spacing:.13em}.hero-copy h1{max-width:700px;margin:0;font:700 clamp(2.8rem,5vw,5rem)/1.03 Georgia,serif;letter-spacing:-.04em}.hero-copy>p:not(.eyebrow){max-width:620px;margin:28px 0;color:var(--muted);font-size:1.06rem}.hero-actions,.summary-actions{display:flex;flex-wrap:wrap;gap:12px}.button{min-height:46px;display:inline-flex;align-items:center;justify-content:center;padding:0 24px;border:1px solid transparent;border-radius:var(--radius);font-size:.9rem;font-weight:700}.button-primary{color:#fff;background:var(--teal)}.button-primary:hover{background:var(--teal-dark)}.button-outline{color:var(--teal);background:#fff;border-color:var(--teal)}.hero-media{aspect-ratio:3/2;overflow:hidden;background:#e6eeec}.hero-media img{width:100%;height:100%;object-fit:cover}.brand-strip{padding:22px 0;color:#6b7f81;border-block:1px solid var(--line)}.brand-strip .shell{display:flex;justify-content:space-between;gap:24px;overflow:auto;font-size:.78rem;font-weight:700;letter-spacing:.09em}.section{padding:96px 0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:48px;margin-bottom:40px}.section-heading h2,.about-grid h2,.contact-grid h2{max-width:680px;margin:0;font:700 clamp(2rem,4vw,3.25rem)/1.13 Georgia,serif;letter-spacing:-.03em}.section-heading>p{max-width:480px;margin:0;color:var(--muted)}.home-category-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:20px}.home-category-card{min-height:250px;display:flex;flex-direction:column;padding:26px;border:1px solid var(--line);transition:.18s ease}.home-category-card:hover,.group-card:hover{transform:translateY(-3px);border-color:#aac6c2;box-shadow:var(--shadow)}.home-category-card>span{color:var(--teal);font-size:.75rem;font-weight:700}.home-category-card h3{margin:44px 0 10px;font:700 1.25rem/1.25 Georgia,serif}.home-category-card p{margin:0;color:var(--muted);font-size:.88rem}.home-category-card strong{margin-top:auto;color:var(--teal);font-size:.82rem}.about-section{color:#fff;background:var(--navy)}.about-grid,.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:96px;align-items:start}.about-grid .eyebrow,.contact-grid .eyebrow{color:#77cbc4}.about-grid p{max-width:600px;color:#d4e0de}.text-link{color:#8ad6cf;font-weight:700}.contact-section{background:var(--subtle)}.contact-grid>div:first-child>p:last-child{max-width:600px;color:var(--muted)}.contact-card{padding:32px;background:#fff;border:1px solid var(--line)}.contact-card h3{margin:0 0 8px;font:700 1.45rem Georgia,serif}.contact-card p{color:var(--muted)}.contact-note{margin:18px 0 0!important;font-size:.78rem}
.catalog-hero{padding:42px 0 36px;background:var(--subtle);border-bottom:1px solid var(--line)}.breadcrumbs{display:flex;flex-wrap:wrap;gap:8px;margin:0 0 12px;color:#718184;font-size:.82rem}.catalog-hero h1,.product-summary h1{margin:0;font:700 clamp(2.2rem,4vw,3.5rem)/1.1 Georgia,serif;letter-spacing:-.035em}.catalog-hero p:last-child{max-width:720px;margin:14px 0 0;color:var(--muted)}.catalog-layout{display:grid;grid-template-columns:278px minmax(0,1fr);gap:48px;padding-top:44px;padding-bottom:96px}.catalog-sidebar{align-self:start;background:#fff;border:1px solid #cdd9d7}.sidebar-title{margin:-1px;padding:18px 20px;color:#fff;background:var(--navy);font:700 1rem/1.4 Arial,sans-serif}.category-tree{margin:0;padding:8px 18px 18px;list-style:none}.category-tree>li{border-bottom:1px solid var(--line)}.tree-row{width:100%;min-height:46px;display:flex;align-items:center;justify-content:space-between;padding:10px 2px;color:var(--ink);background:transparent;border:0;cursor:pointer;text-align:left}.tree-row:hover,.tree-row[aria-expanded=true]{color:var(--teal)}.tree-children{display:none;margin:-2px 0 10px;padding:0 0 3px 16px;border-left:1px solid var(--line);list-style:none}.tree-children.is-open{display:grid}.tree-children a{min-height:32px;display:flex;align-items:center;color:#5a6a6d;font-size:.8rem}.tree-children a:hover,.tree-children a.is-active{color:var(--teal);font-weight:700}.catalog-main{min-width:0}.catalog-main-header{display:flex;align-items:end;justify-content:space-between;gap:24px;margin-bottom:30px}.catalog-main-header h2{margin:0;font:700 clamp(1.8rem,3vw,2.5rem)/1.16 Georgia,serif}.catalog-main-header p{max-width:480px;margin:0;color:var(--muted);font-size:.9rem}.group-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}.group-card{min-height:210px;display:flex;flex-direction:column;padding:26px;background:#fff;border:1px solid var(--line);transition:.18s ease}.group-kicker{color:var(--teal);font-size:.72rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase}.group-card h2{margin:26px 0 8px;font:700 1.25rem/1.25 Georgia,serif}.group-card p{margin:0;color:var(--muted);font-size:.86rem}.card-link{margin-top:auto;color:var(--teal);font-weight:700}.product-list-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:28px 22px}.listing-image{aspect-ratio:1/.86;display:grid;place-items:center;overflow:hidden;background:#f7f9f8;border:1px solid #edf1f0}.listing-image img{width:88%;height:88%;object-fit:contain;transition:transform .2s}.listing-card:hover .listing-image img{transform:scale(1.04)}.listing-card h2{margin:16px 0 7px;font-size:1rem;line-height:1.45}.listing-card p{margin:0;color:var(--muted);font-size:.82rem}.empty-state{padding:48px;background:var(--subtle);border:1px solid var(--line)}.empty-state h2{margin-top:0}.mobile-categories{display:none}
.product-detail{display:grid;grid-template-columns:minmax(0,1.08fr) minmax(320px,.92fr);gap:58px;align-items:start}.gallery-main{aspect-ratio:1/.88;display:grid;place-items:center;background:#f8faf9;border:1px solid var(--line)}.gallery-main img{width:88%;height:88%;object-fit:contain}.gallery-thumbs{display:grid;grid-template-columns:repeat(4,92px);gap:10px;margin-top:12px}.gallery-thumb{aspect-ratio:1;padding:4px;background:#fff;border:1px solid var(--line);cursor:pointer}.gallery-thumb.is-active{border:2px solid var(--teal)}.gallery-thumb img{width:100%;height:100%;object-fit:contain}.product-lead{margin:24px 0;color:var(--muted);font-size:1rem}.product-meta{padding:14px 0;border-block:1px solid var(--line);color:var(--muted);font-size:.82rem}.summary-actions{margin-top:24px}.detail-description{grid-column:1/-1;margin-top:12px}.description-title{margin:0;padding:15px 18px;color:var(--navy);background:#eef3f2;border-top:2px solid var(--teal);font-size:1rem}.description-body{padding:26px 20px 0;color:#33494c}.description-body h2{margin:34px 0 14px;font:700 1.55rem/1.25 Georgia,serif}.spec-table{width:min(100%,780px);border-collapse:collapse;margin-top:18px;font-size:.9rem}.spec-table th,.spec-table td{padding:13px 14px;border:1px solid var(--line);text-align:left}.spec-table th{width:34%;background:var(--subtle)}.content-page{min-height:55vh;padding-block:72px}.content-page h1{font:700 clamp(2.2rem,4vw,3.4rem)/1.15 Georgia,serif}.entry-content{max-width:760px}.post-card{padding:24px 0;border-bottom:1px solid var(--line)}
.site-footer{padding:64px 0 24px;color:#d7e2e0;background:#08282d}.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:64px}.footer-grid h2{margin:0 0 16px;color:#fff;font-size:1rem}.footer-grid p{max-width:480px;color:#aebfbc}.footer-grid a{display:block;margin:8px 0}.footer-grid a:hover{color:#8ad6cf}.footer-bottom{display:flex;justify-content:space-between;gap:20px;margin-top:48px;padding-top:20px;color:#90a8a5;border-top:1px solid rgba(255,255,255,.12);font-size:.78rem}
@media(max-width:980px){.hero-grid{grid-template-columns:1fr;gap:36px}.home-category-grid{grid-template-columns:repeat(2,1fr)}.catalog-layout{grid-template-columns:230px minmax(0,1fr);gap:28px}.group-grid,.product-list-grid{grid-template-columns:repeat(2,1fr)}.product-detail{grid-template-columns:1fr}.detail-description{grid-column:1}.about-grid,.contact-grid{gap:48px}}
@media(max-width:760px){.shell{width:min(calc(100% - 32px),var(--shell))}.nav-wrap{min-height:68px}.menu-toggle{display:block}.site-nav{display:none;position:absolute;inset:68px 0 auto;background:#fff;border-bottom:1px solid var(--line)}.site-nav.is-open{display:block}.site-nav-list{display:grid;gap:0;padding:12px 16px}.site-nav a{min-height:48px;display:flex;align-items:center}.site-nav .nav-cta{margin-top:6px}.hero-section{padding:48px 0}.hero-grid{display:block}.hero-copy h1{font-size:2.65rem}.hero-media{margin-top:36px}.brand-strip .shell{justify-content:flex-start}.section{padding:72px 0}.section-heading,.catalog-main-header{display:block}.section-heading>p,.catalog-main-header p{margin-top:12px}.home-category-grid,.group-grid,.product-list-grid{grid-template-columns:1fr 1fr;gap:16px}.about-grid,.contact-grid{grid-template-columns:1fr;gap:36px}.catalog-hero{padding:28px 0}.catalog-layout{display:block;padding-top:24px;padding-bottom:72px}.mobile-categories{width:100%;min-height:48px;display:flex;align-items:center;justify-content:space-between;margin-bottom:20px;padding:0 16px;color:#fff;background:var(--navy);border:0;font-weight:700}.catalog-sidebar{display:none;margin-bottom:26px}.catalog-sidebar.is-open{display:block}.gallery-thumbs{grid-template-columns:repeat(4,1fr)}.footer-grid{grid-template-columns:1fr 1fr}.footer-grid>div:first-child{grid-column:1/-1}}
@media(max-width:500px){.hero-copy h1{font-size:2.25rem}.home-category-grid,.group-grid,.product-list-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.footer-grid>div:first-child{grid-column:auto}.footer-bottom{display:block}.footer-bottom span{display:block;margin:6px 0}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;transition:none!important}}

/* Company identity and contact details. */
.brand-logo{width:48px;height:48px;object-fit:contain}
.contact-card h3{margin-bottom:20px}
.contact-list{margin:0 0 24px}
.contact-list>div{display:grid;grid-template-columns:82px 1fr;gap:16px;padding:14px 0;border-top:1px solid var(--line)}
.contact-list dt{color:var(--muted);font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.06em}
.contact-list dd{margin:0;overflow-wrap:anywhere}
.contact-list a{color:var(--teal);font-weight:700}
.footer-grid address{max-width:560px;color:#aebfbc;font-size:.86rem;font-style:normal}
.footer-grid address span{display:block;margin:8px 0}
@media(max-width:500px){.contact-list>div{grid-template-columns:1fr;gap:4px}}

/* Migrated company pages and long product descriptions. */
.company-content{display:grid;grid-template-columns:minmax(0,1.35fr) minmax(300px,.65fr);gap:72px;align-items:start;padding-block:72px 96px}
.company-prose{max-width:760px;color:#33494c;font-size:1.04rem;line-height:1.78}
.company-prose h2{margin:0 0 24px;font:700 clamp(1.8rem,3vw,2.5rem)/1.2 Georgia,serif;color:var(--ink)}
.company-prose p{margin:0 0 20px}
.company-aside{padding:32px;color:#d4e0de;background:var(--navy)}
.company-aside h2{margin:0 0 16px;color:#fff;font:700 1.7rem/1.25 Georgia,serif}
.company-aside p:not(.eyebrow){margin:0 0 24px}
.company-page .contact-card h2{margin:0 0 20px;font:700 1.45rem/1.25 Georgia,serif}
.description-body{overflow-x:auto}
.description-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:.9rem}
.description-body th,.description-body td{padding:12px 14px;border-bottom:1px solid var(--line);text-align:left;vertical-align:top}
.description-body th{color:var(--ink);background:var(--subtle)}
@media(max-width:760px){.company-content{grid-template-columns:1fr;gap:36px;padding-block:48px 72px}}