/* ============================================================
   EWIN Energy — Official Website Styles
   Light theme · Brand palette: #0D1B2A / #0057B8 / #2F80ED
   No build tools required.
   ============================================================ */
:root{
  --ink:#0D1B2A;
  --ink-2:#12283f;
  --ink-3:#1b3a5c;
  --accent:#0057B8;
  --accent-dark:#004494;
  --accent-bright:#2F80ED;
  --accent-soft:#E8F1FC;
  --bg:#FFFFFF;
  --bg-alt:#F4F6F8;
  --surface:#ffffff;
  --text:#202832;
  --muted:#5A6B7F;
  --line:#DFE5EB;
  --radius:14px;
  --shadow:0 10px 30px rgba(13,27,42,.08);
  --shadow-lg:0 24px 60px rgba(13,27,42,.14);
  --font:"Inter","Segoe UI",-apple-system,BlinkMacSystemFont,"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.65;font-size:16px;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:84px 0}
section.alt{background:var(--bg-alt)}
::selection{background:var(--accent);color:#fff}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;gap:10px;padding:14px 30px;border-radius:999px;font-weight:700;font-size:15px;letter-spacing:.02em;border:2px solid transparent;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s,color .25s}
.btn-primary{background:var(--accent);color:#fff;box-shadow:0 8px 24px rgba(0,87,184,.3)}
.btn-primary:hover{background:var(--accent-bright);color:#fff;transform:translateY(-2px)}
.btn-outline{border-color:rgba(255,255,255,.55);color:#fff;background:rgba(255,255,255,.06)}
.btn-outline:hover{background:#fff;color:var(--ink);transform:translateY(-2px)}
.btn-dark{background:var(--ink);color:#fff}
.btn-dark:hover{background:var(--ink-3);transform:translateY(-2px)}
.btn-sm{padding:10px 22px;font-size:14px}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:76px}
.logo{display:flex;align-items:center;gap:12px}
.logo-img{height:46px;width:auto;flex:none}
.main-nav{display:flex;gap:6px}
.main-nav a{color:var(--text);font-size:15px;font-weight:600;padding:10px 16px;border-radius:10px;transition:.2s}
.main-nav a:hover{color:var(--accent);background:var(--bg-alt)}
.main-nav a.active{color:var(--accent)}
.header-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{display:block;width:26px;height:2px;background:var(--ink);margin:6px 0;border-radius:2px;transition:.3s}

/* ---------- Hero ---------- */
.hero{position:relative;overflow:hidden;background:radial-gradient(1100px 520px at 82% -10%,rgba(47,128,237,.28),transparent 60%),linear-gradient(135deg,#0D1B2A 0%,#12304f 55%,#0D1B2A 100%);color:#fff;padding:110px 0 96px}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.05) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.05) 1px,transparent 1px);background-size:44px 44px;mask-image:radial-gradient(800px 500px at 70% 20%,#000 40%,transparent 100%)}
.hero-grid{position:relative;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:12.5px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;color:#8fbdf7;background:rgba(47,128,237,.14);border:1px solid rgba(47,128,237,.4);padding:8px 16px;border-radius:999px;margin-bottom:22px}
.hero h1{font-size:clamp(34px,4.6vw,58px);line-height:1.12;font-weight:800;letter-spacing:-.01em;margin-bottom:20px}
.hero h1 .hl{color:var(--accent-bright)}
.hero p.lead{font-size:18px;color:#b9c8dc;max-width:560px;margin-bottom:34px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:44px}
.hero-meta{display:flex;gap:36px;flex-wrap:wrap}
.hero-meta div strong{display:block;font-size:26px;color:#fff}
.hero-meta div span{font-size:13px;color:#8d9cb3}
.hero-visual{position:relative}
.hero-card{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.12);border-radius:20px;padding:26px;backdrop-filter:blur(6px)}
.hero-card img{border-radius:12px}
.hero-badges{position:absolute;display:flex;gap:10px;flex-wrap:wrap;bottom:-18px;left:24px;right:24px}
.hero-badges span{background:var(--accent);color:#fff;font-size:12.5px;font-weight:800;padding:8px 14px;border-radius:999px;box-shadow:0 8px 20px rgba(0,0,0,.3)}

/* ---------- Section headers ---------- */
.sec-head{max-width:720px;margin:0 auto 52px;text-align:center}
.sec-head.left{margin:0 0 44px;text-align:left}
.kicker{font-size:12.5px;font-weight:800;letter-spacing:.26em;text-transform:uppercase;color:var(--accent);margin-bottom:12px}
.sec-head h2{font-size:clamp(28px,3.4vw,42px);line-height:1.2;color:var(--ink);font-weight:800;letter-spacing:-.01em;margin-bottom:14px}
.sec-head p{color:var(--muted);font-size:17px}

/* ---------- Category cards ---------- */
.cat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.cat-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s;display:flex;flex-direction:column}
.cat-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg);border-color:#bcd6f5}
.cat-card .ph{aspect-ratio:4/3;overflow:hidden;background:var(--bg-alt)}
.cat-card .ph img{width:100%;height:100%;object-fit:cover}
.cat-body{padding:24px}
.cat-body h3{font-size:19px;color:var(--ink);margin-bottom:8px}
.cat-body p{font-size:14.5px;color:var(--muted);margin-bottom:16px}
.link-arrow{font-weight:700;color:var(--accent);font-size:14.5px;display:inline-flex;align-items:center;gap:8px}
.link-arrow:hover{gap:12px;color:var(--accent-bright)}

/* ---------- Advantages ---------- */
.advantages{background:var(--ink);color:#fff;position:relative;overflow:hidden}
.advantages .sec-head h2{color:#fff}
.advantages .sec-head p{color:#9fb0c7}
.adv-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.adv-card{background:rgba(255,255,255,.04);border:1px solid rgba(47,128,237,.22);border-radius:var(--radius);padding:32px 26px;transition:.3s}
.adv-card:hover{background:rgba(47,128,237,.1);border-color:rgba(47,128,237,.5);transform:translateY(-6px)}
.adv-icon{width:56px;height:56px;border-radius:14px;background:rgba(47,128,237,.16);display:flex;align-items:center;justify-content:center;margin-bottom:20px}
.adv-icon svg{width:28px;height:28px;stroke:var(--accent-bright)}
.adv-card h3{font-size:18px;margin-bottom:10px}
.adv-card p{font-size:14.5px;color:#9fb0c7}

/* ---------- Stats band ---------- */
.stats-band{background:linear-gradient(120deg,var(--accent) 0%,var(--accent-bright) 100%);padding:56px 0}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat strong{display:block;font-size:clamp(34px,4vw,52px);font-weight:800;color:#fff;line-height:1.1}
.stat span{font-size:14.5px;font-weight:600;color:rgba(255,255,255,.88)}

/* ---------- Applications ---------- */
.app-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.app-card{position:relative;border-radius:var(--radius);overflow:hidden;min-height:260px;display:flex;align-items:flex-end;color:#fff;box-shadow:var(--shadow)}
.app-card .app-bg{position:absolute;inset:0}
.app-card .app-bg img{width:100%;height:100%;object-fit:cover;transition:transform .6s}
.app-card:hover .app-bg img{transform:scale(1.06)}
.app-card::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 30%,rgba(13,27,42,.88))}
.app-body{position:relative;padding:26px;z-index:1}
.app-body h3{font-size:20px;margin-bottom:6px}
.app-body p{font-size:14px;color:#c8d6e8}

/* ---------- News cards ---------- */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg)}
.news-card .ph{aspect-ratio:16/9;background:var(--bg-alt);overflow:hidden}
.news-card .ph img{width:100%;height:100%;object-fit:cover}
.news-body{padding:24px;display:flex;flex-direction:column;flex:1}
.news-date{font-size:12.5px;font-weight:700;color:var(--accent);letter-spacing:.08em;text-transform:uppercase;margin-bottom:8px}
.news-body h3{font-size:17.5px;color:var(--ink);line-height:1.4;margin-bottom:10px}
.news-body p{font-size:14.5px;color:var(--muted);flex:1;margin-bottom:16px}

/* ---------- CTA banner ---------- */
.cta-banner{background:radial-gradient(700px 300px at 20% 0%,rgba(47,128,237,.3),transparent 60%),linear-gradient(135deg,#0D1B2A,#14304f);border-radius:24px;padding:64px 56px;color:#fff;display:flex;align-items:center;justify-content:space-between;gap:36px;flex-wrap:wrap;position:relative;overflow:hidden}
.cta-banner h2{font-size:clamp(26px,3vw,38px);margin-bottom:10px}
.cta-banner p{color:#a9bcd4;max-width:560px}

/* ---------- Footer ---------- */
.site-footer{background:#0D1B2A;color:#a9bcd4;padding:72px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:40px;margin-bottom:52px}
.footer-brand p{font-size:14.5px;margin:16px 0 22px;max-width:320px}
.logo-chip{display:inline-block;background:#fff;border-radius:10px;padding:8px 14px}
.logo-chip .logo-img{height:40px}
.footer-col h4{color:#fff;font-size:15px;margin-bottom:18px;letter-spacing:.04em}
.footer-col ul li{margin-bottom:11px}
.footer-col a{font-size:14.5px;transition:.2s}
.footer-col a:hover{color:var(--accent-bright)}
.social-row{display:flex;gap:10px}
.social-row a{width:38px;height:38px;border-radius:10px;background:rgba(255,255,255,.07);display:flex;align-items:center;justify-content:center;font-size:13px;font-weight:800;color:#fff}
.social-row a:hover{background:var(--accent);color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:22px 0;display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;font-size:13.5px}

/* ---------- Page hero (inner pages) ---------- */
.page-hero{background:radial-gradient(900px 400px at 80% 0%,rgba(47,128,237,.25),transparent 60%),linear-gradient(135deg,#0D1B2A,#14304f);color:#fff;padding:84px 0 72px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.04) 1px,transparent 1px);background-size:44px 44px}
.page-hero .container{position:relative}
.page-hero h1{font-size:clamp(32px,4vw,50px);font-weight:800;margin-bottom:14px}
.page-hero p{color:#a9bcd4;font-size:17px;max-width:640px}
.crumbs{font-size:13.5px;color:#8d9cb3;margin-bottom:16px}
.crumbs a:hover{color:var(--accent-bright)}

/* ---------- Products ---------- */
.filter-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:40px}
.filter-tabs button{padding:11px 24px;border-radius:999px;border:1.5px solid var(--line);background:#fff;font-weight:700;font-size:14.5px;color:var(--muted);cursor:pointer;transition:.25s}
.filter-tabs button:hover{border-color:var(--accent);color:var(--accent)}
.filter-tabs button.active{background:var(--ink);border-color:var(--ink);color:#fff}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.3s;display:flex;flex-direction:column;position:relative}
.product-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-lg)}
.product-card .ph{aspect-ratio:4/3;background:var(--bg-alt);overflow:hidden}
.product-card .ph img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-card:hover .ph img{transform:scale(1.05)}
.p-tag{position:absolute;top:14px;left:14px;background:var(--accent);color:#fff;font-size:12px;font-weight:800;padding:6px 13px;border-radius:999px;letter-spacing:.04em}
.p-body{padding:24px;display:flex;flex-direction:column;flex:1}
.p-body h3{font-size:18px;color:var(--ink);margin-bottom:6px}
.p-specs{display:flex;gap:14px;margin:12px 0 18px;flex-wrap:wrap}
.p-specs span{font-size:13px;background:var(--bg-alt);border:1px solid var(--line);padding:6px 12px;border-radius:8px;color:var(--text);font-weight:600}
.p-specs span b{color:var(--accent)}
.p-body p{font-size:14px;color:var(--muted);flex:1;margin-bottom:18px}
.p-actions{display:flex;gap:10px}
.hide{display:none!important}

/* ---------- Product detail ---------- */
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:start;margin-bottom:70px}
.detail-gallery{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px;box-shadow:var(--shadow)}
.detail-gallery img{border-radius:12px}
.detail-info .p-tag{position:static;display:inline-block;margin-bottom:14px}
.detail-info h1{font-size:clamp(28px,3.4vw,42px);color:var(--ink);margin-bottom:12px}
.detail-info .sku{font-size:13.5px;color:var(--muted);margin-bottom:18px}
.detail-info .desc{color:var(--muted);margin-bottom:26px}
.detail-actions{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:30px}
.detail-highlights{display:grid;grid-template-columns:1fr 1fr;gap:12px}
.detail-highlights div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:14px 16px;font-size:14px}
.detail-highlights b{display:block;color:var(--ink);font-size:13px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:4px}
.spec-section{background:#fff;border:1px solid var(--line);border-radius:20px;padding:44px;box-shadow:var(--shadow);margin-bottom:70px}
.spec-section h2{color:var(--ink);font-size:24px;margin-bottom:26px}
.spec-table{width:100%;border-collapse:collapse;font-size:15px}
.spec-table tr{border-bottom:1px solid var(--line)}
.spec-table tr:last-child{border-bottom:0}
.spec-table th{text-align:left;padding:14px 18px;color:var(--muted);font-weight:600;width:38%;background:var(--bg-alt)}
.spec-table td{padding:14px 18px;color:var(--ink);font-weight:600}
.feature-list{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin-top:8px}
.feature-list li{background:var(--bg-alt);border:1px solid var(--line);border-radius:12px;padding:18px 20px;font-size:14.5px;display:flex;gap:12px;align-items:flex-start}
.feature-list li::before{content:"✓";color:#fff;background:#1f9d55;font-weight:800;width:24px;height:24px;flex:none;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:13px;margin-top:2px}

/* ---------- OEM/ODM ---------- */
.oem-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-bottom:70px}
.oem-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px 28px;box-shadow:var(--shadow);border-top:4px solid var(--accent)}
.oem-card h3{color:var(--ink);font-size:19px;margin-bottom:10px}
.oem-card p{font-size:14.5px;color:var(--muted)}
.oem-card ul{margin-top:14px}
.oem-card ul li{font-size:14px;color:var(--text);padding:7px 0 7px 26px;position:relative}
.oem-card ul li::before{content:"→";position:absolute;left:0;color:var(--accent);font-weight:800}
.process{display:grid;grid-template-columns:repeat(5,1fr);gap:16px;margin-bottom:70px}
.step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px 22px;box-shadow:var(--shadow);text-align:center;position:relative}
.step-num{width:46px;height:46px;border-radius:50%;background:var(--ink);color:var(--accent-bright);font-weight:800;font-size:18px;display:flex;align-items:center;justify-content:center;margin:0 auto 16px}
.step h4{color:var(--ink);font-size:16px;margin-bottom:8px}
.step p{font-size:13.5px;color:var(--muted)}
.moq-band{background:var(--ink);border-radius:20px;color:#fff;padding:48px;display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-bottom:70px}
.moq-band div strong{display:block;font-size:30px;color:var(--accent-bright);margin-bottom:6px}
.moq-band div span{color:#9fb0c7;font-size:14.5px}

/* ---------- About ---------- */
.about-grid{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;margin-bottom:80px}
.about-grid img{border-radius:20px;box-shadow:var(--shadow-lg)}
.about-grid h2{color:var(--ink);font-size:clamp(26px,3vw,36px);margin-bottom:18px}
.about-grid p{color:var(--muted);margin-bottom:16px}
.timeline{position:relative;max-width:760px;margin:0 auto 80px;padding-left:34px}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;background:var(--line)}
.t-item{position:relative;padding:0 0 36px 22px}
.t-item::before{content:"";position:absolute;left:-32px;top:6px;width:14px;height:14px;border-radius:50%;background:var(--accent);box-shadow:0 0 0 5px var(--accent-soft)}
.t-item strong{color:var(--ink);font-size:17px}
.t-item p{color:var(--muted);font-size:14.5px;margin-top:4px}
.cert-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:16px}
.cert{background:#fff;border:1.5px solid var(--line);border-radius:14px;padding:26px 12px;text-align:center;font-weight:800;color:var(--ink);font-size:15px;transition:.25s}
.cert:hover{border-color:var(--accent);transform:translateY(-4px)}
.cert small{display:block;font-weight:600;color:var(--muted);font-size:12px;margin-top:6px}

/* ---------- News page ---------- */
.news-article{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);margin-bottom:26px;overflow:hidden}
.news-article summary{cursor:pointer;padding:28px 32px;display:flex;gap:26px;align-items:center;list-style:none}
.news-article summary::-webkit-details-marker{display:none}
.news-article summary:hover h3{color:var(--accent)}
.news-thumb{width:150px;height:100px;flex:none;border-radius:10px;overflow:hidden;background:var(--bg-alt)}
.news-thumb img{width:100%;height:100%;object-fit:cover}
.news-summary-text{flex:1}
.news-summary-text h3{color:var(--ink);font-size:19px;margin:6px 0;transition:.2s}
.news-summary-text p{font-size:14px;color:var(--muted)}
.news-full{padding:0 32px 32px 208px;color:var(--text);font-size:15.5px}
.news-full p{margin-bottom:14px}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:1fr 1.15fr;gap:44px;align-items:start;margin-bottom:70px}
.info-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px;margin-bottom:20px;display:flex;gap:18px;align-items:flex-start}
.info-icon{width:50px;height:50px;flex:none;border-radius:12px;background:var(--accent-soft);display:flex;align-items:center;justify-content:center}
.info-icon svg{width:24px;height:24px;stroke:var(--accent)}
.info-card h4{color:var(--ink);font-size:16px;margin-bottom:4px}
.info-card p{font-size:14.5px;color:var(--muted)}
.form-card{background:#fff;border:1px solid var(--line);border-radius:20px;box-shadow:var(--shadow-lg);padding:44px}
.form-card h2{color:var(--ink);font-size:24px;margin-bottom:8px}
.form-card>p{color:var(--muted);font-size:14.5px;margin-bottom:28px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-group{margin-bottom:18px}
.form-group label{display:block;font-size:13.5px;font-weight:700;color:var(--ink);margin-bottom:8px}
.form-group input,.form-group select,.form-group textarea{width:100%;padding:13px 16px;border:1.5px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;color:var(--text);background:var(--bg-alt);transition:.2s}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{outline:none;border-color:var(--accent);background:#fff;box-shadow:0 0 0 4px rgba(0,87,184,.12)}
.form-group textarea{min-height:140px;resize:vertical}
.form-note{font-size:13px;color:var(--muted);margin-top:14px}
.form-success{display:none;background:#e8f7ee;border:1.5px solid #1f9d55;color:#146c3a;border-radius:12px;padding:18px 22px;font-size:15px;margin-bottom:20px}
.map-ph{background:var(--bg-alt);border-radius:20px;min-height:320px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-weight:600;border:2px dashed var(--line);margin-bottom:70px}

/* ---------- Placeholder images ---------- */
.ph img{display:block}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ---------- Back to top ---------- */
.to-top{position:fixed;right:26px;bottom:26px;width:48px;height:48px;border-radius:50%;background:var(--ink);color:#fff;border:0;font-size:20px;cursor:pointer;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.3s;z-index:90}
.to-top.show{opacity:1;pointer-events:auto}
.to-top:hover{background:var(--accent)}

/* ---------- Responsive ---------- */
@media(max-width:1024px){
  .cat-grid,.adv-grid{grid-template-columns:repeat(2,1fr)}
  .app-grid,.news-grid,.product-grid,.oem-grid{grid-template-columns:repeat(2,1fr)}
  .process{grid-template-columns:repeat(3,1fr)}
  .cert-grid{grid-template-columns:repeat(3,1fr)}
  .hero-grid{grid-template-columns:1fr;gap:44px}
  .detail-grid,.about-grid,.contact-grid{grid-template-columns:1fr;gap:40px}
  .moq-band{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .news-full{padding:0 32px 32px}
}
@media(max-width:768px){
  section{padding:64px 0}
  .main-nav{position:fixed;top:76px;left:0;right:0;background:#fff;flex-direction:column;padding:18px 24px 26px;gap:2px;transform:translateY(-130%);transition:transform .35s ease;border-bottom:1px solid var(--line);box-shadow:var(--shadow-lg)}
  .main-nav.open{transform:none}
  .main-nav a{padding:13px 10px;font-size:16px;color:var(--text)}
  .nav-toggle{display:block}
  .header-cta .btn{display:none}
  .logo-img{height:38px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:28px}
  .feature-list{grid-template-columns:1fr}
  .detail-highlights{grid-template-columns:1fr}
  .form-row{grid-template-columns:1fr}
  .cta-banner{padding:44px 30px}
  .spec-section{padding:28px 20px}
  .news-article summary{flex-direction:column;align-items:flex-start}
  .news-thumb{width:100%;height:170px}
}
@media(max-width:520px){
  .cat-grid,.adv-grid,.app-grid,.news-grid,.product-grid,.oem-grid{grid-template-columns:1fr}
  .process{grid-template-columns:1fr 1fr}
  .cert-grid{grid-template-columns:repeat(2,1fr)}
  .moq-band{grid-template-columns:1fr;padding:36px 28px}
  .footer-grid{grid-template-columns:1fr}
  .hero{padding:80px 0 70px}
  .form-card{padding:30px 22px}
}