:root{--blue:#16335c;--blue2:#1f4e8c;--accent:#f5a623;--grey:#f4f6f9;--ink:#222;--line:#e3e8ef;--gold:#d4a017}
.cert-section{padding:60px 0;background:var(--grey)}
.cert-section h2{text-align:center;margin-bottom:16px;color:var(--blue)}
.cert-intro{text-align:center;max-width:780px;margin:0 auto 32px;color:#555}
.cert-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:20px;max-width:1180px;margin:0 auto;padding:0 20px}
.cert-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;display:flex;flex-direction:column;transition:transform .25s,box-shadow .25s;text-decoration:none;color:inherit}
.cert-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(22,51,92,.15)}
.cert-card img{width:100%;height:200px;object-fit:contain;background:#fff;padding:10px}
.cert-meta{padding:14px 16px;display:flex;flex-direction:column;gap:4px;border-top:1px solid var(--line)}
.cert-meta strong{color:var(--blue);font-size:14px;line-height:1.4}
.cert-meta strong.en{font-size:13px}
.cert-meta span{font-size:12px;color:#666}
.biz-section{padding:60px 0;background:#fff}
.biz-section .sec-title{text-align:center;margin-bottom:28px;color:var(--blue)}
.biz-table{max-width:820px;margin:0 auto;border-collapse:collapse;width:100%}
.biz-table th{background:var(--grey);text-align:left;padding:14px 18px;font-weight:700;color:var(--blue);width:38%;border:1px solid var(--line);vertical-align:top}
.biz-table td{padding:14px 18px;border:1px solid var(--line);color:#333}
*{box-sizing:border-box;margin:0;padding:0}
body{font-family:"Microsoft YaHei","PingFang SC",system-ui,Arial,sans-serif;color:var(--ink);line-height:1.7;background:#fff}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
body.lang-zh .en{display:none}
body.lang-en .zh{display:none}
.site-header{background:var(--blue);position:sticky;top:0;z-index:50;box-shadow:0 2px 8px rgba(0,0,0,.15)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;text-decoration:none}
.logo-box{width:38px;height:38px;background:url("../img/logo.png") center/contain no-repeat;display:inline-block}
.brand-text strong{display:block;font-size:14px}
.brand-text em{display:block;font-style:normal;font-size:11px;opacity:.8}
nav{display:flex;align-items:center;gap:18px}
.nav-list{display:flex;list-style:none;gap:18px}
.nav-list a{color:#dfe7f3;text-decoration:none;font-size:14px;padding:6px 2px;border-bottom:2px solid transparent}
.nav-list a:hover,.nav-list li.active a{color:#fff;border-color:var(--accent)}
.lang-toggle{background:transparent;border:1px solid #5b7bb0;color:#dfe7f3;border-radius:6px;padding:4px 10px;cursor:pointer;font-size:12px}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer}
.nav-toggle span{width:22px;height:2px;background:#fff;display:block}
.hero{background:linear-gradient(135deg,var(--blue),var(--blue2));color:#fff;padding:70px 0}
.hero h1{font-size:32px;margin-bottom:14px}
.hero p{max-width:680px;opacity:.92}
.btn{display:inline-block;margin-top:22px;background:var(--accent);color:#16335c;padding:11px 26px;border-radius:8px;text-decoration:none;font-weight:700}
.btn.ghost{background:transparent;border:1px solid var(--blue);color:var(--blue)}
.section{padding:54px 0}
.sec-title{font-size:24px;color:var(--blue);margin-bottom:18px;position:relative;padding-left:14px}
.sec-title:before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;background:var(--accent)}
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px}
.card{background:var(--grey);border:1px solid var(--line);border-radius:12px;padding:20px}
.card h3{color:var(--blue);margin-bottom:8px}
.prod-img{display:flex;align-items:center;justify-content:center;min-height:120px;padding:12px;background:linear-gradient(135deg,#dbe6f5,#c3d4ec);border-radius:8px;margin-bottom:12px}
.prod-img img{max-height:210px;max-width:100%;width:auto;mix-blend-mode:multiply}
.prod-shot{width:100%;border-radius:8px;margin-top:12px;border:1px solid var(--line);display:block}
.poster-grid{display:grid;grid-template-columns:repeat(2,minmax(0,420px));gap:24px;justify-content:center;margin-top:10px}
.poster-grid img{width:100%;border-radius:12px;border:1px solid var(--line);box-shadow:0 4px 14px rgba(15,37,69,.08)}
.shot-stack{max-width:920px;margin:0 auto;display:grid;gap:18px}
.shot-stack img{width:100%;border-radius:10px;border:1px solid var(--line);box-shadow:0 4px 14px rgba(15,37,69,.08)}
.video-grid{display:grid;grid-template-columns:repeat(2,minmax(0,460px));gap:24px;justify-content:center;margin-top:10px}
.video-grid--vertical{grid-template-columns:repeat(4,minmax(0,280px))}
.video-card{background:#fff;border:1px solid var(--line);border-radius:12px;overflow:hidden;box-shadow:0 4px 14px rgba(15,37,69,.08)}
.video-card video{width:100%;display:block;aspect-ratio:16/9;background:#0b1524}
.video-grid--vertical .video-card video{aspect-ratio:9/16}
.video-card figcaption{padding:10px 14px;font-size:14px;color:#43536b}
.video-card figcaption .cap-en{display:block;font-size:12px;color:#98a2b3;margin-top:2px}
.cat-tag{display:inline-block;font-size:12px;color:#fff;background:var(--blue2);padding:2px 10px;border-radius:20px;margin-bottom:8px}
.feat-list{list-style:none;margin-top:10px}
.feat-list li{padding:4px 0 4px 16px;position:relative;font-size:13px}
.feat-list li:before{content:"▸";position:absolute;left:0;color:var(--accent)}
.tag{display:inline-block;font-size:12px;color:#888;margin-top:8px}
.spec{margin-top:12px;padding-top:10px;border-top:1px dashed var(--line);font-size:12px;line-height:1.7;color:#8a94a6}
.case-line{margin-top:10px;padding:8px 10px;background:var(--grey);border-left:3px solid var(--accent);border-radius:0 6px 6px 0;font-size:12.5px;color:#4a5568}
.news-list{list-style:none}
.news-list li{padding:12px 0;border-bottom:1px solid var(--line)}
.date{display:inline-block;min-width:70px;color:var(--accent);font-weight:700}
.logo-wall{display:flex;flex-wrap:wrap;gap:14px}
.logo-wall span{background:var(--grey);border:1px solid var(--line);border-radius:8px;padding:10px 16px;font-weight:600;color:var(--blue)}
.logo-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(170px,1fr));gap:14px;margin-top:8px}
.logo-card{display:flex;align-items:center;justify-content:center;min-height:82px;padding:14px 12px;background:#fff;border:1px solid var(--line);border-radius:10px;transition:border-color .25s,box-shadow .25s,transform .25s}
.logo-card img{height:36px;width:auto;max-width:100%;filter:grayscale(1);opacity:.72;transition:filter .25s,opacity .25s}
.logo-card:hover{border-color:var(--accent);box-shadow:0 6px 18px rgba(20,60,120,.10);transform:translateY(-2px)}
.logo-card:hover img{filter:none;opacity:1}
.logo-note{margin-top:14px;font-size:12px;color:#98a2b3}
@media (max-width:900px){.video-grid--vertical{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media (max-width:600px){.logo-grid{grid-template-columns:repeat(2,1fr);gap:10px}.logo-card{min-height:68px}.logo-card img{height:28px}.poster-grid,.video-grid{grid-template-columns:minmax(0,1fr)}.video-grid--vertical{grid-template-columns:repeat(2,minmax(0,1fr))}}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:36px}
.contact-form input,.contact-form textarea{width:100%;padding:10px 12px;margin-bottom:12px;border:1px solid var(--line);border-radius:8px;font-family:inherit}
.site-footer{background:#0f2545;color:#cdd8ea;padding:40px 0 18px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px}
.site-footer h4{color:#fff;margin-bottom:12px}
.site-footer a{color:#9fb4d4;text-decoration:none}
.foot-links{list-style:none}
.copyright{border-top:1px solid #1d3a5c;margin-top:24px;padding-top:14px;font-size:12px;opacity:.7;text-align:center}
@media(max-width:860px){
  .nav-toggle{display:flex}
  nav{position:absolute;top:64px;left:0;right:0;background:var(--blue);flex-direction:column;padding:14px 20px;display:none}
  nav.open{display:flex}
  .nav-list{flex-direction:column;gap:10px;width:100%}
  .contact-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
}