/* DTENT — displaytent.net 营销型独立站 全站样式 */
:root{
  --navy:#12395e; --navy-d:#0c2a46; --orange:#f26a21; --orange-d:#d95a15;
  --ink:#1d2733; --gray:#5a6a7a; --line:#e3e9ef; --bg:#f5f8fa; --white:#fff;
}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--ink);background:var(--white);line-height:1.6}
img{max-width:100%;display:block}
a{text-decoration:none;color:inherit}
.wrap{max-width:1140px;margin:0 auto;padding:0 20px}
.btn{display:inline-block;padding:13px 30px;border-radius:4px;font-weight:700;font-size:15px;letter-spacing:.3px;transition:.2s;cursor:pointer;border:none}
.btn-primary{background:var(--orange);color:#fff}
.btn-primary:hover{background:var(--orange-d)}
.btn-ghost{border:2px solid #fff;color:#fff;margin-left:12px}
.btn-ghost:hover{background:rgba(255,255,255,.12)}
h2.sec{font-size:32px;text-align:center;color:var(--navy);margin-bottom:8px}
p.sec-sub{text-align:center;color:var(--gray);max-width:640px;margin:0 auto 44px}

/* top bar */
.topbar{background:var(--navy-d);color:#cdd9e5;font-size:13px;padding:7px 0}
.topbar .wrap{display:flex;justify-content:space-between;gap:16px}
.topbar span{margin-right:18px}

/* nav */
header.nav{position:sticky;top:0;background:#fff;box-shadow:0 1px 8px rgba(16,42,67,.08);z-index:50}
header.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:68px}
.logo{font-size:26px;font-weight:800;color:var(--navy);letter-spacing:.5px}
.logo em{color:var(--orange);font-style:normal}
.logo small{display:block;font-size:10px;font-weight:400;color:var(--gray);letter-spacing:1.5px;margin-top:-3px}
nav.menu{display:flex;gap:28px;font-size:15px;font-weight:600;color:var(--navy)}
nav.menu a:hover{color:var(--orange)}
nav.menu a.on{color:var(--orange)}

/* hero */
.hero{position:relative;color:#fff;background:linear-gradient(rgba(10,30,52,.72),rgba(10,30,52,.72)),url("assets/hero-event.jpg") center/cover;padding:110px 0 120px}
.hero h1{font-size:46px;line-height:1.18;max-width:720px;margin-bottom:20px}
.hero h1 b{color:#ffb37e}
.hero p{max-width:640px;font-size:18px;color:#e3ecf4;margin-bottom:34px}
.hero.slim{padding:64px 0 70px}
.hero.slim h1{font-size:36px}

/* trust bar */
.trust{background:var(--navy);color:#fff;padding:26px 0}
.trust .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:18px;text-align:center}
.trust b{display:block;font-size:30px;color:#ffb37e}
.trust span{font-size:14px;color:#cdd9e5}

/* products */
.products{padding:76px 0 84px;background:var(--bg)}
.grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 2px 10px rgba(16,42,67,.07);transition:.2s;display:block}
.card:hover{transform:translateY(-4px);box-shadow:0 8px 22px rgba(16,42,67,.14)}
.card .thumb{height:170px;background:#dfe8ef center/cover;position:relative}
.card .body{padding:16px 18px 20px}
.card h3{font-size:16px;color:var(--navy);margin-bottom:6px}
.card p{font-size:13px;color:var(--gray)}
.ph{display:flex;align-items:center;justify-content:center;height:100%;border:2px dashed #b9c8d4;color:#7d93a5;font-size:12px;text-align:center;padding:10px;background:#eef3f7}
.hot{position:absolute;top:10px;left:10px;background:var(--orange);color:#fff;font-size:11px;font-weight:700;letter-spacing:.5px;padding:3px 10px;border-radius:3px}

/* breadcrumb */
.crumbs{font-size:13px;color:var(--gray);padding:16px 0 0}
.crumbs a{color:var(--navy)}
.crumbs a:hover{color:var(--orange)}

/* article / product page */
.article{padding:34px 0 70px}
.article h1{font-size:34px;color:var(--navy);line-height:1.25;margin-bottom:14px}
.article .lead{font-size:17px;color:var(--gray);max-width:820px;margin-bottom:30px}
.article h2{font-size:24px;color:var(--navy);margin:44px 0 14px}
.article h3{font-size:18px;color:var(--navy);margin:26px 0 10px}
.article p{margin-bottom:14px;color:#33414f}
.article ul.checks{list-style:none;margin:10px 0 18px}
.article ul.checks li{padding-left:30px;position:relative;margin-bottom:12px;font-size:15px}
.article ul.checks li::before{content:"✔";position:absolute;left:0;color:var(--orange);font-weight:700}
.split{display:grid;grid-template-columns:1.05fr 1fr;gap:52px;align-items:center;margin:10px 0 20px}
.factory-img{border-radius:8px;overflow:hidden;box-shadow:0 10px 30px rgba(16,42,67,.16)}
.figure-note{font-size:12px;color:#8aa0b2;margin-top:6px}

/* spec table */
table.spec{width:100%;border-collapse:collapse;font-size:14.5px;margin:14px 0 8px}
table.spec th{background:var(--navy);color:#fff;text-align:left;padding:10px 14px;font-weight:700}
table.spec td{border:1px solid var(--line);padding:9px 14px}
table.spec tr:nth-child(even) td{background:#f8fafc}

/* chips */
.chips{display:flex;flex-wrap:wrap;gap:10px;margin:12px 0 6px}
.chip{background:#fff;border:1px solid var(--line);border-radius:20px;padding:6px 16px;font-size:13.5px;color:var(--navy)}

/* process */
.process{background:var(--navy);color:#fff;padding:76px 0}
.process h2{color:#fff}
.process p.sec-sub{color:#b8c9d9}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:26px;margin-top:10px}
.step{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:8px;padding:26px 22px}
.step .n{width:40px;height:40px;border-radius:50%;background:var(--orange);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:18px;margin-bottom:14px}
.step h3{font-size:16px;margin-bottom:8px}
.step p{font-size:13.5px;color:#c3d2df}

/* certs + faq */
.certs{padding:66px 0;background:var(--bg)}
.cert-row{display:flex;gap:22px;justify-content:center;flex-wrap:wrap}
.cert{background:#fff;border:1px solid var(--line);border-radius:8px;width:200px;height:110px;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#7d93a5;font-size:13px;text-align:center;padding:10px}
.cert b{color:var(--navy);font-size:15px}
.faq{padding:76px 0}
.faq details{max-width:820px;margin:0 auto 14px;background:#fff;border:1px solid var(--line);border-radius:8px;padding:18px 24px}
.faq summary{font-weight:700;color:var(--navy);cursor:pointer;font-size:16px}
.faq p{margin-top:12px;color:var(--gray);font-size:15px}
.faq-inline details{background:#f8fafc;margin-bottom:14px}

/* quote */
.quote{background:linear-gradient(rgba(12,42,70,.94),rgba(12,42,70,.94)),url("assets/hero-event.jpg") center/cover;color:#fff;padding:80px 0}
.quote-grid{display:grid;grid-template-columns:1fr 1.1fr;gap:56px;align-items:start}
.quote h2{color:#fff;text-align:left}
.quote .left p{color:#c3d2df;margin:14px 0 22px}
.contact-line{font-size:15px;margin-bottom:10px;color:#e3ecf4}
.contact-line b{color:#ffb37e}
.qr-row{display:flex;gap:18px;margin-top:20px}
.qr-card{background:#fff;border-radius:8px;padding:10px;width:132px;text-align:center}
.qr-card img{width:100%;border-radius:4px}
.qr-card span{display:block;font-size:12px;font-weight:700;color:var(--navy);margin-top:6px}
.qr-card small{display:block;font-size:10.5px;color:#7d93a5}
form.quote-form{display:grid;grid-template-columns:1fr 1fr;gap:14px}
form.quote-form .full{grid-column:1/-1}
input,select,textarea{width:100%;padding:12px 14px;border:1px solid #35577a;background:rgba(255,255,255,.08);color:#fff;border-radius:4px;font-size:14px;font-family:inherit}
input::placeholder,textarea::placeholder{color:#9fb4c6}
select option{color:#1d2733}
.form-note{font-size:12px;color:#9fb4c6;margin-top:10px}

/* footer */
footer{background:var(--navy-d);color:#9fb4c6;padding:52px 0 26px;font-size:14px}
footer .wrap{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:44px}
footer h4{color:#fff;font-size:15px;margin-bottom:14px}
footer a{display:block;margin-bottom:8px}
footer a:hover{color:#fff}
.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:38px;padding-top:20px;text-align:center;font-size:13px;color:#7a93a9}

/* whatsapp float */
.wa{position:fixed;right:22px;bottom:22px;width:58px;height:58px;border-radius:50%;background:#25d366;display:flex;align-items:center;justify-content:center;box-shadow:0 6px 18px rgba(0,0,0,.25);z-index:99}
.wa svg{width:30px;height:30px;fill:#fff}

/* 404 */
.nf{padding:120px 0;text-align:center}
.nf h1{font-size:60px;color:var(--navy)}
.nf p{color:var(--gray);margin:14px 0 30px}

@media(max-width:900px){
  .grid,.steps{grid-template-columns:repeat(2,1fr)}
  .grid.two{grid-template-columns:1fr}
  .split,.quote-grid{grid-template-columns:1fr}
  .hero h1,.hero.slim h1{font-size:30px}
  .article h1{font-size:27px}
  nav.menu{display:none}
  footer .wrap{grid-template-columns:1fr}
  .topbar .wrap{justify-content:center}
}