/* home.css - extracted from original front-end HTML, layout unchanged */
:root{
      --navy:#243746; --navy-2:#172733; --ink:#18232c; --muted:#64727d;
      --paper:#ffffff; --soft:#f3f6f7; --line:#dce3e7; --amber:#e7a52b;
      --amber-dark:#bd7d0d; --radius:18px; --shadow:0 18px 50px rgba(20,37,49,.10);
      --max:1200px;
    }
    *{box-sizing:border-box}
    html{scroll-behavior:smooth;scroll-padding-top:92px}
    body{margin:0;font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.65}
    img{display:block;max-width:100%}
    a{color:inherit;text-decoration:none}
    button,input,select,textarea{font:inherit}
    button,a{ -webkit-tap-highlight-color:transparent}
    .container{width:min(var(--max),calc(100% - 48px));margin-inline:auto}
    .eyebrow{display:inline-flex;align-items:center;gap:10px;text-transform:uppercase;letter-spacing:.14em;font-size:.74rem;font-weight:800;color:var(--amber-dark)}
    .eyebrow:before{content:"";width:28px;height:2px;background:var(--amber)}
    h1,h2,h3,p{margin-top:0}
    h1,h2,h3{line-height:1.15;letter-spacing:-.035em}
    h1{font-size:clamp(2.7rem,5.5vw,5rem);max-width:760px;margin:20px 0}
    h2{font-size:clamp(2rem,3.7vw,3.2rem);margin-bottom:18px}
    h3{font-size:1.25rem;margin-bottom:10px}
    p{color:var(--muted)}
    .section{padding:96px 0}
    .section-soft{background:var(--soft)}
    .section-head{max-width:720px;margin-bottom:42px}
    .section-head p{font-size:1.05rem}
    .btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;padding:13px 19px;border:1px solid transparent;border-radius:9px;font-weight:750;font-size:.92rem;cursor:pointer;transition:transform .2s,background .2s,border-color .2s}
    .btn:hover{transform:translateY(-2px)}
    .btn-primary{background:var(--amber);color:#17232b}
    .btn-primary:hover{background:#f0b642}
    .btn-dark{background:var(--navy);color:white}
    .btn-dark:hover{background:var(--navy-2)}
    .btn-outline{border-color:#cbd5db;background:transparent;color:var(--ink)}
    .btn-outline:hover{border-color:var(--navy);background:#fff}
    .btn-light{background:#fff;color:var(--navy)}
    .btn-small{padding:10px 13px;font-size:.84rem}
    .topbar{background:var(--navy-2);color:#d8e1e7;font-size:.78rem}
    .topbar-inner{min-height:36px;display:flex;align-items:center;justify-content:space-between;gap:20px}
    .topbar a{color:#fff}
    .topbar-right{display:flex;align-items:center;gap:14px;margin-left:auto}
    .lang-switch{display:flex;align-items:center;gap:2px;flex:none;padding:2px;border:1px solid rgba(255,255,255,.32);border-radius:999px}
    .lang-link{display:inline-block;padding:2px 9px;border-radius:999px;font-size:.68rem;font-weight:800;letter-spacing:.08em;line-height:1.6;opacity:.7;text-decoration:none;transition:opacity .18s ease,background .18s ease,color .18s ease}
    .lang-link:hover{opacity:1}
    .lang-link.is-active{background:#fff;color:var(--navy);opacity:1}
    header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(14px);border-bottom:1px solid rgba(220,227,231,.9)}
    .nav{height:78px;display:flex;align-items:center;justify-content:space-between;gap:28px}
    .brand{display:flex;align-items:center;gap:12px;min-width:200px}
    .brand-mark{width:42px;height:42px;border-radius:11px;background:var(--navy);display:grid;place-items:center;position:relative;overflow:hidden}
    .brand-mark:before{content:"";width:22px;height:22px;border:3px solid var(--amber);border-radius:6px;transform:rotate(45deg)}
    .brand-mark:after{content:"";position:absolute;width:7px;height:28px;background:#fff;opacity:.95;transform:rotate(45deg)}
    .brand-name{font-size:1.18rem;font-weight:900;letter-spacing:.08em;line-height:1;color:var(--navy)}
    .brand-sub{display:block;margin-top:6px;font-size:.58rem;letter-spacing:.14em;font-weight:800;color:#687782}
    .nav-links{display:flex;align-items:center;gap:27px;font-size:.9rem;font-weight:700}
    .nav-links a:not(.btn):hover{color:var(--amber-dark)}
    .nav-cta{white-space:nowrap}
    .menu-toggle{display:none;border:1px solid var(--line);background:white;border-radius:8px;padding:9px 11px;font-size:1.2rem}
    .hero{position:relative;overflow:hidden;background:var(--navy-2);color:#fff}
    .hero:before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 75% 35%,rgba(231,165,43,.15),transparent 32%),linear-gradient(115deg,rgba(23,39,51,.98),rgba(36,55,70,.94))}
    .hero-grid{position:relative;display:grid;grid-template-columns:1.02fr .98fr;gap:50px;align-items:center;min-height:640px;padding-top:64px;padding-bottom:64px}
    .hero h1{color:#fff}
    .hero-copy>p{font-size:1.1rem;max-width:610px;color:#d5dee4}
    .hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin:30px 0 28px}
    .hero-points{display:flex;flex-wrap:wrap;gap:18px;color:#dce4e9;font-size:.83rem}
    .hero-points span{display:flex;align-items:center;gap:8px}
    .check{display:inline-grid;place-items:center;width:19px;height:19px;border-radius:50%;background:rgba(231,165,43,.17);color:var(--amber);font-weight:900;font-size:.75rem}
    .hero-art{position:relative;min-height:470px;display:grid;place-items:center}
    .hero-orbit{position:absolute;width:min(100%,500px);aspect-ratio:1;border:1px solid rgba(255,255,255,.12);border-radius:50%}
    .hero-orbit:before,.hero-orbit:after{content:"";position:absolute;border:1px solid rgba(255,255,255,.1);border-radius:50%;inset:11%}
    .hero-orbit:after{inset:23%}
    .product-stage{position:relative;width:100%;max-width:510px;display:grid;gap:18px}
    .stage-card{border:1px solid rgba(255,255,255,.18);background:linear-gradient(135deg,rgba(255,255,255,.12),rgba(255,255,255,.035));border-radius:18px;padding:20px;box-shadow:0 25px 55px rgba(0,0,0,.15);backdrop-filter:blur(12px)}
    .stage-card-top{display:flex;align-items:center;justify-content:space-between;gap:15px;color:#e9eef1;font-size:.78rem;font-weight:800;text-transform:uppercase;letter-spacing:.09em}
    .stage-label{color:var(--amber)}
    .conduit-visual{height:126px;display:flex;align-items:center;justify-content:center;overflow:hidden}
    .conduit-coil{width:195px;height:100px;border-radius:50%;border:13px solid #aeb9c0;box-shadow:inset 0 0 0 4px #5f6d77,0 0 0 5px #dce2e5;transform:rotate(-14deg);position:relative}
    .conduit-coil:before{content:"";position:absolute;inset:8px -8px -8px 8px;border-radius:50%;border:7px solid #71808a;opacity:.9}
    .conduit-coil:after{content:"";position:absolute;inset:18px -18px -18px 18px;border-radius:50%;border:5px solid #bfc8cd;opacity:.9}
    .ramp-visual{height:112px;display:flex;align-items:center;justify-content:center;perspective:500px}
    .ramp-body{width:86%;height:74px;background:linear-gradient(180deg,#202a31,#10171c);border:2px solid #56636b;border-radius:8px;transform:skewY(-5deg);position:relative;box-shadow:0 18px 25px rgba(0,0,0,.25)}
    .ramp-body:before{content:"";position:absolute;inset:9px 12px;border-radius:4px;background:repeating-linear-gradient(90deg,#e7a52b 0 3px,transparent 3px 31px);opacity:.95}
    .ramp-body:after{content:"";position:absolute;left:0;right:0;top:50%;height:2px;background:#77848b}
    .stage-foot{display:flex;align-items:center;justify-content:space-between;color:#c6d0d7;font-size:.77rem}
    .hero-badge{position:absolute;right:-2px;bottom:30px;background:var(--amber);color:#17232b;border-radius:12px;padding:13px 16px;box-shadow:var(--shadow);font-weight:850;font-size:.82rem;transform:rotate(2deg)}
    .trust-strip{background:#fff;border-bottom:1px solid var(--line)}
    .trust-inner{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:23px 0}
    .trust-item{display:flex;align-items:center;gap:12px;font-size:.86rem;font-weight:750;color:#354652}
    .trust-icon{width:37px;height:37px;border-radius:10px;background:#f2f5f6;display:grid;place-items:center;color:var(--amber-dark);font-weight:900}
    .products-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
    .product-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:#fff;transition:transform .25s,box-shadow .25s}
    .product-card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
    .product-visual{height:290px;display:grid;place-items:center;position:relative;overflow:hidden;background:linear-gradient(135deg,#edf1f3,#dfe6e9)}
    .product-visual.dark{background:linear-gradient(135deg,#dfe5e8,#cbd4d9)}
    .product-visual .visual-caption{position:absolute;top:18px;left:18px;background:rgba(255,255,255,.85);padding:7px 10px;border-radius:7px;font-size:.68rem;text-transform:uppercase;letter-spacing:.1em;font-weight:850;color:var(--navy)}
    .conduit-art{width:220px;height:130px;position:relative;border-radius:50%;border:19px solid #87959e;box-shadow:inset 0 0 0 7px #e3e7e9,0 0 0 5px #bcc6cc;transform:rotate(-18deg)}
    .conduit-art:before{content:"";position:absolute;inset:7px -8px -8px 7px;border:8px solid #596974;border-radius:50%}
    .conduit-art:after{content:"";position:absolute;inset:17px -17px -17px 17px;border:6px solid #a8b4bb;border-radius:50%}
    .conduit-cut{position:absolute;width:72px;height:48px;background:#d9e0e4;border:8px solid #697983;border-radius:50%;right:calc(50% - 110px);bottom:55px;transform:rotate(-18deg)}
    .ramp-art{width:76%;height:110px;border-radius:8px;background:linear-gradient(180deg,#303a40,#141c21);transform:skewY(-7deg);position:relative;box-shadow:0 25px 25px rgba(23,39,51,.2);border:2px solid #647078}
    .ramp-art:before{content:"";position:absolute;inset:12px 14px;background:repeating-linear-gradient(90deg,var(--amber) 0 5px,transparent 5px 38px);border-radius:4px}
    .ramp-art:after{content:"";position:absolute;left:0;right:0;top:52%;height:5px;background:#0e1519;box-shadow:0 -23px 0 #202b32,0 23px 0 #202b32}
    .product-content{padding:28px}
    .product-content p{margin-bottom:20px}
    .feature-list{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:20px 0 25px;padding:0;list-style:none}
    .feature-list li{font-size:.86rem;color:#42515b;display:flex;gap:8px}
    .feature-list li:before{content:"✓";color:var(--amber-dark);font-weight:900}
    .text-link{display:inline-flex;align-items:center;gap:8px;font-weight:800;font-size:.9rem;color:var(--navy)}
    .text-link:hover{color:var(--amber-dark)}
    .two-col{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
    .editorial-panel{border-radius:var(--radius);padding:38px;background:var(--navy);color:#fff;position:relative;overflow:hidden;min-height:380px;display:flex;flex-direction:column;justify-content:space-between}
    .editorial-panel:after{content:"";position:absolute;width:320px;height:320px;border:1px solid rgba(255,255,255,.14);border-radius:50%;right:-90px;top:-100px;box-shadow:0 0 0 35px rgba(255,255,255,.025),0 0 0 70px rgba(255,255,255,.02)}
    .editorial-panel h3{position:relative;z-index:1;font-size:1.8rem;max-width:360px;color:#fff}
    .editorial-panel p{position:relative;z-index:1;color:#d2dce2;max-width:380px}
    .mini-tags{display:flex;flex-wrap:wrap;gap:8px;position:relative;z-index:1}
    .mini-tags span{border:1px solid rgba(255,255,255,.23);border-radius:99px;padding:7px 10px;font-size:.76rem;color:#e8edf0}
    .check-list{padding:0;list-style:none;margin:25px 0}
    .check-list li{display:flex;gap:13px;margin:14px 0;color:#3d4b55}
    .check-list .check{flex:0 0 21px;margin-top:2px}
    .app-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .app-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:23px 20px;min-height:225px;transition:transform .2s,border-color .2s}
    .app-card:hover{transform:translateY(-4px);border-color:#aab8c1}
    .app-icon{width:47px;height:47px;border-radius:13px;background:#f7ead0;color:#8e5c06;display:grid;place-items:center;font-size:1.25rem;font-weight:900;margin-bottom:22px}
    .app-card p{font-size:.9rem;margin-bottom:0}
    .industry-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
    .industry-card{border:1px solid var(--line);border-radius:14px;padding:23px 20px;background:#fff;min-height:220px}
    .industry-card>span{display:inline-grid;place-items:center;width:36px;height:36px;border-radius:10px;background:#f7ead0;color:#8e5c06;font-weight:900;font-size:.8rem;margin-bottom:20px}
    .industry-card h3{font-size:1.1rem}
    .industry-card p{font-size:.88rem;margin-bottom:0}
    .spec-layout{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}
    .spec-note{padding:25px;border-left:3px solid var(--amber);background:#fff;border-radius:0 12px 12px 0}
    .spec-note p{margin:0;font-size:.93rem}
    .spec-table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:14px;background:#fff}
    table{border-collapse:collapse;width:100%;min-width:440px}
    th,td{text-align:left;padding:15px 17px;border-bottom:1px solid var(--line);font-size:.9rem}
    th{background:#edf1f3;color:#30414d;font-size:.78rem;text-transform:uppercase;letter-spacing:.07em}
    tr:last-child td{border-bottom:0}
    td:last-child{color:var(--muted)}
    .oem-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}
    .steps{display:grid;gap:14px;margin-top:26px}
    .step{display:grid;grid-template-columns:43px 1fr;gap:14px;align-items:start}
    .step-num{width:43px;height:43px;border-radius:12px;background:#f8e8c7;color:#79500c;display:grid;place-items:center;font-weight:900}
    .step p{margin:0;font-size:.92rem}
    .oem-visual{min-height:420px;border-radius:var(--radius);background:linear-gradient(135deg,#e8edef,#d4dde1);display:grid;place-items:center;padding:28px;position:relative;overflow:hidden}
    .oem-visual:before{content:"";position:absolute;width:340px;height:340px;border:1px solid rgba(36,55,70,.12);border-radius:50%;box-shadow:0 0 0 35px rgba(36,55,70,.035),0 0 0 70px rgba(36,55,70,.025)}
    .oem-stack{position:relative;z-index:1;width:min(100%,350px);display:grid;gap:13px}
    .oem-box{padding:20px;border-radius:12px;background:#fff;box-shadow:0 12px 25px rgba(25,43,55,.09);display:flex;align-items:center;justify-content:space-between;gap:15px}
    .oem-box strong{display:block;color:var(--navy)}
    .oem-box small{color:var(--muted)}
    .oem-chip{background:var(--amber);color:#17232b;border-radius:8px;padding:7px 9px;font-size:.68rem;font-weight:900;letter-spacing:.08em}
    .faq-list{max-width:880px;margin:0 auto}
    details{border-bottom:1px solid var(--line);padding:20px 0}
    summary{font-weight:800;cursor:pointer;list-style:none;display:flex;justify-content:space-between;gap:20px}
    summary::-webkit-details-marker{display:none}
    summary:after{content:"+";font-size:1.4rem;font-weight:500;color:var(--amber-dark);line-height:1}
    details[open] summary:after{content:"−"}
    details p{margin:14px 35px 0 0}
    .cta-band{background:var(--navy);color:#fff;padding:64px 0}
    .cta-inner{display:flex;align-items:center;justify-content:space-between;gap:35px}
    .cta-inner h2{font-size:clamp(1.8rem,3vw,2.6rem);margin-bottom:12px;color:#fff}
    .cta-inner p{margin:0;color:#d4dde3;max-width:650px}
    .contact-grid{display:grid;grid-template-columns:.8fr 1.2fr;gap:60px;align-items:start}
    .contact-card{background:var(--soft);border-radius:var(--radius);padding:30px}
    .contact-line{display:flex;gap:14px;margin:22px 0}
    .contact-line .app-icon{flex:0 0 42px;width:42px;height:42px;margin:0;font-size:1rem}
    .contact-line strong{display:block;font-size:.9rem}
    .contact-line span{display:block;color:var(--muted);font-size:.9rem;overflow-wrap:anywhere}
    form{display:grid;gap:16px}
    .form-row{display:grid;grid-template-columns:1fr 1fr;gap:15px}
    label{display:block;font-size:.83rem;font-weight:800;margin-bottom:7px;color:#344550}
    input,select,textarea{width:100%;border:1px solid #cfd8dd;border-radius:9px;padding:12px 13px;background:#fff;color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s}
    input:focus,select:focus,textarea:focus{border-color:#718b9b;box-shadow:0 0 0 3px rgba(36,55,70,.08)}
    textarea{min-height:120px;resize:vertical}
    .form-note{font-size:.78rem;color:var(--muted);margin:0}
    .form-status{display:none;border-radius:8px;background:#e8f5ec;color:#205b35;padding:12px;font-size:.9rem}
    footer{background:#172733;color:#d8e0e5;padding:58px 0 24px}
    .footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:38px;padding-bottom:42px}
    footer .brand-name{color:#fff}
    footer .brand-sub{color:#b6c2ca}
    footer p,footer a{color:#bdc9d0;font-size:.88rem}
    footer a:hover{color:var(--amber)}
    footer h4{color:#fff;font-size:.88rem;margin:0 0 17px}
    .footer-links{display:grid;gap:10px}
    .footer-bottom{border-top:1px solid rgba(255,255,255,.14);padding-top:22px;display:flex;justify-content:space-between;gap:20px;font-size:.78rem;color:#9eafb9}
    .footer-bottom p{margin:0;color:inherit}
    .mobile-quote{display:none}
    .notice{font-size:.8rem;color:#6c7880;background:#f7f8f9;border:1px solid var(--line);padding:12px 14px;border-radius:9px}
    @media(max-width:1000px){
      .nav-links{gap:15px}.nav-links>a:not(.btn){font-size:.84rem}
      .hero-grid{gap:24px}.app-grid{grid-template-columns:repeat(2,1fr)}
      .industry-grid{grid-template-columns:repeat(2,1fr)}
      .trust-inner{grid-template-columns:repeat(2,1fr)}
      .two-col,.spec-layout,.oem-grid,.contact-grid{gap:35px}
      .footer-grid{grid-template-columns:repeat(2,1fr)}
    }
    @media(max-width:760px){
      .container{width:min(100% - 34px,var(--max))}
      .section{padding:68px 0}
      .topbar-inner{justify-content:center;text-align:center;min-height:34px;gap:12px}
      .topbar-inner .topbar-right{display:none}
      .lang-switch{margin-left:0}
      .nav{height:68px}
      .brand{min-width:0}.brand-mark{width:38px;height:38px}.brand-name{font-size:1.02rem}.brand-sub{font-size:.52rem}
      .menu-toggle{display:block}
      .nav-cta{display:none}
      .nav-links{display:none;position:absolute;left:0;right:0;top:68px;background:#fff;border-bottom:1px solid var(--line);padding:18px 24px 24px;box-shadow:0 20px 25px rgba(20,37,49,.08);align-items:stretch;gap:0;flex-direction:column}
      .nav-links.open{display:flex}
      .nav-links>a:not(.btn){padding:13px 0;border-bottom:1px solid #edf0f2;font-size:.95rem}
      .nav-links .btn{margin-top:15px}
      .hero-grid{grid-template-columns:1fr;min-height:auto;padding-top:64px;padding-bottom:55px}
      .hero-art{min-height:365px;margin-top:0}
      .product-stage{max-width:480px}
      .stage-card{padding:15px}
      .conduit-visual{height:92px}.conduit-coil{transform:scale(.78) rotate(-14deg)}
      .ramp-visual{height:85px}.ramp-body{height:60px}
      .hero-badge{right:0;bottom:5px}
      .trust-inner{gap:14px;padding:20px 0}.trust-item{font-size:.78rem;gap:8px}.trust-icon{width:32px;height:32px;flex:0 0 32px}
      .products-grid,.two-col,.spec-layout,.oem-grid,.contact-grid{grid-template-columns:1fr}
      .product-visual{height:235px}.product-content{padding:23px}
      .two-col{gap:30px}
      .editorial-panel{min-height:330px;padding:28px}
      .app-grid{gap:12px}.app-card{padding:18px;min-height:210px}
      .spec-layout{gap:25px}
      .oem-visual{min-height:330px}
      .cta-inner{align-items:flex-start;flex-direction:column}
      .footer-grid{grid-template-columns:1fr 1fr;gap:30px 20px}
      .footer-grid>div:first-child{grid-column:1/-1}
      .footer-bottom{flex-direction:column;gap:8px}
      .form-row{grid-template-columns:1fr}
      .mobile-quote{display:block;position:fixed;z-index:45;bottom:12px;left:16px;right:16px;box-shadow:0 10px 30px rgba(20,37,49,.2)}
      body{padding-bottom:65px}
    }
    @media(max-width:420px){
      .hero-actions .btn{width:100%}
      .trust-inner{grid-template-columns:1fr 1fr}
      .feature-list{grid-template-columns:1fr}
      .app-grid{grid-template-columns:1fr}
      .industry-grid{grid-template-columns:1fr}
      .app-card{min-height:0}
      .footer-grid{grid-template-columns:1fr}
      .footer-grid>div:first-child{grid-column:auto}
      .hero-art{min-height:340px}
    }
    @media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}

/* ---- 导航二级菜单（Products 下拉，整项可点）---- */
.nav-item{position:relative;display:inline-flex;align-items:center}
.nav-item-link{display:inline-flex;align-items:center;gap:6px;white-space:nowrap;cursor:pointer}
/* 箭头画在文字后面（整项都是触发器，不再有独立小三角按钮） */
.nav-item-link:after{content:"▾";font-size:.62rem;line-height:1;opacity:.65;
  transition:opacity .18s ease,transform .18s ease}
.nav-item:hover .nav-item-link:after{opacity:1}
.nav-item.is-open .nav-item-link:after{opacity:1;transform:rotate(180deg)}

/* 面板：绝对定位，不参与页面流 */
.nav-sub{position:absolute;top:calc(100% + 14px);left:-16px;z-index:200;
  min-width:244px;background:#fff;border:1px solid #e3e9ed;border-radius:10px;
  padding:6px;display:none;white-space:nowrap;
  box-shadow:0 22px 48px rgba(20,37,49,.16),0 3px 10px rgba(20,37,49,.06)}
.nav-sub:before{content:"";position:absolute;top:0;left:0;right:0;height:3px;
  background:#e7a52b;border-radius:9px 9px 0 0}
.nav-sub.open{display:block}

/* 每一项独占一行，右端箭头 */
.nav-sub a{display:flex!important;align-items:center;justify-content:space-between;gap:20px;
  padding:12px 16px!important;border:0!important;border-radius:7px;background:none!important;
  font-size:.9rem!important;font-weight:700;color:#243746!important;
  text-decoration:none!important;white-space:nowrap;text-transform:none!important;
  line-height:1.3!important;letter-spacing:0!important;transition:background .16s ease}
.nav-sub a:after{content:"›";font-size:1.05rem;line-height:1;opacity:.35;
  transition:opacity .16s ease,transform .16s ease}
.nav-sub a:hover,.nav-sub a:focus{background:#f3f6f7!important;color:#bd7d0d!important}
.nav-sub a:hover:after{opacity:1;transform:translateX(2px)}

/* 窄屏（与导航 760px 汉堡断点一致）：改为菜单内联展开，避免溢出 */
@media(max-width:760px){
  .nav-item{position:relative;display:block;width:100%}
  .nav-item-link{display:flex;justify-content:space-between;padding:13px 0;
    border-bottom:1px solid #edf0f2;font-size:.95rem}
  .nav-item-link:after{font-size:.9rem;padding-right:4px}
  .nav-sub{position:static;min-width:0;margin:4px 0 10px;border-radius:8px;box-shadow:none;
    border-color:#e8eef1;white-space:normal}
  .nav-sub:before{display:none}
  .nav-sub a{padding:11px 14px!important}
}

/* ---------------------------------------------------------------------------
   后台产品图片：上传后显示真实图片，未上传时回退到原 CSS 绘制的示意图。
   图片来源 = 内容管理里对应产品的「图片」字段。
   --------------------------------------------------------------------------- */
.product-photo{display:block;width:auto;height:auto;max-width:78%;max-height:210px;object-fit:contain}
.stage-photo{display:block;width:auto;height:auto;max-width:210px;max-height:100%;object-fit:contain}
@media (max-width:640px){
  .product-photo{max-height:165px}
  .stage-photo{max-width:160px}
}

/* ---------------------------------------------------------------------------
   HTML hidden 属性必须真正生效。
   本主题的卡片等元素带 display:flex/grid，会盖掉浏览器默认的 [hidden]{display:none}，
   导致 JS 里 el.hidden = true 无效（产品列表页的筛选器就因此失效）。
   --------------------------------------------------------------------------- */
[hidden]{display:none!important}

/* 首页图片：图一=轮播多图(pics)，图二=缩略图(ico)，未上传时回退原 CSS 图形 */
.conduit-visual:has(.stage-photo) .conduit-coil{display:none}
.ramp-visual:has(.stage-photo) .ramp-body{display:none}

/* ---------------------------------------------------------------------------
   产品详情页多图画廊（来源 = 后台产品内容的「轮播多图」字段）。
   未上传时不渲染任何内容，页面与原来完全一致。
   --------------------------------------------------------------------------- */
.product-gallery{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;margin:0 0 30px}
.product-gallery a{display:block;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff;
  transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.product-gallery a:hover{transform:translateY(-3px);box-shadow:0 10px 26px rgba(24,38,51,.13);border-color:#c5d0d8}
.product-gallery img{display:block;width:100%;height:190px;object-fit:cover}
@media (max-width:760px){
  .product-gallery{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .product-gallery img{height:140px}
}

/* ---- 官方 LOGO 图片（导航栏）---- */
.brand-logo{display:block;height:52px;width:auto;max-width:100%}
.brand-logo-footer{height:50px}
@media(max-width:850px){.brand-logo{height:44px}.brand-logo-footer{height:42px}}
@media(max-width:560px){.brand-logo{height:38px}.brand-logo-footer{height:38px}}