:root{
  --ink:#17212b; --muted:#66717d; --line:#e5e9ed; --soft:#f5f7f8;
  --brand:#c83a2a; --brand2:#8d2018; --white:#fff; --max:1240px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:"Microsoft YaHei","PingFang SC","Noto Sans CJK SC",Arial,sans-serif;color:var(--ink);background:#fff;line-height:1.7}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{width:min(var(--max),calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line);backdrop-filter:blur(10px)}
.header-inner{height:78px;display:flex;align-items:center;gap:30px}
.brand{display:flex;align-items:center;min-width:210px}
.brand img{max-height:48px;max-width:220px;object-fit:contain}
.nav{margin-left:auto;display:flex;align-items:center;gap:28px;font-weight:600}
.nav a{padding:27px 0;position:relative}
.nav a:hover,.nav a.active{color:var(--brand)}
.nav a.active:after{content:"";position:absolute;left:0;right:0;bottom:17px;height:2px;background:var(--brand)}
.header-cta{padding:10px 17px;background:var(--brand);color:#fff;border-radius:5px;font-weight:700}
.menu-btn{display:none;margin-left:auto;border:1px solid var(--line);background:#fff;border-radius:6px;padding:8px 10px;font-size:22px}
.hero{background:#111;position:relative;overflow:hidden}
.hero img{width:100%;height:min(520px,42vw);min-height:280px;object-fit:cover;opacity:.92}
.hero-overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.58),rgba(0,0,0,.05) 65%)}
.hero-copy{position:absolute;left:max(20px,calc((100% - var(--max))/2));top:50%;transform:translateY(-50%);color:#fff;max-width:650px;padding-right:20px}
.hero-copy h1{font-size:clamp(30px,4vw,56px);line-height:1.15;margin:0 0 14px}
.hero-copy p{font-size:clamp(15px,1.6vw,20px);opacity:.93;margin:0 0 24px}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 20px;border-radius:5px;background:var(--brand);color:#fff;font-weight:700}
.btn.secondary{background:#fff;color:var(--ink);border:1px solid var(--line)}
.section{padding:66px 0}
.section.alt{background:var(--soft)}
.section-head{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:28px}
.section-head h2{font-size:32px;line-height:1.25;margin:0}
.section-head p{margin:7px 0 0;color:var(--muted)}
.more{color:var(--brand);font-weight:700;white-space:nowrap}
.grid{display:grid;gap:22px}
.grid.cols-4{grid-template-columns:repeat(4,1fr)}
.grid.cols-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:10px;overflow:hidden;transition:.2s}
.card:hover{transform:translateY(-3px);box-shadow:0 12px 32px rgba(0,0,0,.08)}
.card-media{aspect-ratio:4/3;background:linear-gradient(135deg,#edf0f2,#dfe4e7);overflow:hidden}
.card-media img{width:100%;height:100%;object-fit:cover}
.card-body{padding:18px}
.card h3{font-size:19px;line-height:1.45;margin:0 0 8px}
.card p{font-size:14px;color:var(--muted);margin:0}
.chips{display:flex;gap:8px;flex-wrap:wrap;margin-top:12px}
.chip{font-size:12px;padding:4px 8px;border-radius:999px;background:#f8ecea;color:var(--brand2)}
.cat-strip{display:grid;grid-template-columns:repeat(5,1fr);gap:12px}
.cat-strip a{border:1px solid var(--line);background:#fff;padding:18px 14px;border-radius:8px;text-align:center;font-weight:700}
.cat-strip a:hover{border-color:var(--brand);color:var(--brand)}
.page-hero{background:#202830;color:#fff;padding:54px 0}
.page-hero h1{font-size:38px;line-height:1.25;margin:0 0 8px}
.page-hero p{margin:0;opacity:.8;max-width:800px}
.breadcrumb{font-size:13px;color:#8b949d;margin-bottom:14px}
.breadcrumb a{color:#c9d0d6}
.layout{display:grid;grid-template-columns:minmax(0,1fr) 290px;gap:34px;padding:48px 0 70px}
.article{min-width:0}
.article-head{border-bottom:1px solid var(--line);padding-bottom:20px;margin-bottom:26px}
.article-head h1{font-size:34px;line-height:1.35;margin:0 0 10px}
.meta{color:var(--muted);font-size:14px}
.pro-hero{display:grid;grid-template-columns:46% 1fr;gap:34px;margin-bottom:36px}
.pro-hero .image{border:1px solid var(--line);border-radius:10px;overflow:hidden;background:#f5f5f5}
.pro-hero .image img{width:100%;height:100%;min-height:330px;object-fit:contain}
.pro-summary h1{font-size:36px;line-height:1.25;margin:0 0 12px}
.lead{font-size:16px;color:#52606d}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:20px 0}
.spec{padding:13px 14px;background:#f7f8f9;border-left:3px solid var(--brand)}
.spec b{display:block;font-size:13px;color:#77818b;margin-bottom:3px}
.content h2,.content h3{line-height:1.35;margin:34px 0 14px}
.content h2{font-size:26px;border-left:4px solid var(--brand);padding-left:12px}
.content h3{font-size:21px}
.content p{margin:12px 0;color:#34404c}
.content img{margin:20px auto;border-radius:6px;height:auto}
.content table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px;display:block;overflow-x:auto}
.content th,.content td{border:1px solid #dfe4e7;padding:9px 11px;white-space:normal}
.content tr:nth-child(even){background:#f8f9fa}
.content ul,.content ol{padding-left:24px}
.content blockquote{margin:20px 0;padding:15px 18px;background:#f7f8f9;border-left:4px solid #c8cfd5}
.side-box{border:1px solid var(--line);border-radius:9px;padding:18px;margin-bottom:18px;background:#fff}
.side-box h3{margin:0 0 12px;font-size:18px}
.side-list a{display:block;padding:9px 0;border-bottom:1px dashed var(--line);font-size:14px}
.side-list a:last-child{border-bottom:0}
.contact-box{background:#242d35;color:#fff}
.contact-box p{color:#d7dde2;font-size:14px}
.contact-box .phone{font-size:22px;font-weight:800;color:#fff}
.cta-band{background:#202830;color:#fff;padding:38px 0}
.cta-inner{display:flex;align-items:center;justify-content:space-between;gap:20px}
.cta-inner h2{margin:0 0 4px;font-size:28px}
.cta-inner p{margin:0;color:#c7cdd2}
.list-tabs{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.list-tabs a{padding:9px 14px;border:1px solid var(--line);border-radius:5px;background:#fff}
.list-tabs a.active,.list-tabs a:hover{border-color:var(--brand);color:var(--brand)}
.list-row{display:grid;grid-template-columns:220px 1fr;gap:22px;padding:22px 0;border-bottom:1px solid var(--line)}
.list-row .thumb{height:145px;background:#f0f2f4;border-radius:7px;overflow:hidden}
.list-row .thumb img{width:100%;height:100%;object-fit:cover}
.list-row h2{font-size:21px;margin:2px 0 8px}
.list-row p{color:var(--muted);margin:0}
.list-row .date{font-size:13px;color:#8a949e;margin-top:10px}
.about-block{display:grid;grid-template-columns:1fr 1fr;gap:38px;align-items:center}
.about-block h2{font-size:32px;margin:0 0 16px}
.about-block p{color:#475461}
.gallery{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}
.gallery img{width:100%;aspect-ratio:4/3;object-fit:cover;border-radius:7px}
.contact-grid{display:grid;grid-template-columns:1fr 1fr;gap:32px}
.contact-card{border:1px solid var(--line);border-radius:10px;padding:26px;background:#fff}
.contact-card h2{margin-top:0}
.info-line{padding:11px 0;border-bottom:1px solid var(--line)}
.footer{background:#131a20;color:#c7cdd2;padding:42px 0 24px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:36px}
.footer img{max-height:50px;max-width:210px}
.footer h3{color:#fff;font-size:16px;margin:0 0 12px}
.footer a{display:block;padding:4px 0;color:#c7cdd2}
.footer a:hover{color:#fff}
.footer-bottom{border-top:1px solid #2d363d;margin-top:28px;padding-top:18px;font-size:13px;color:#89949d}
.pagination{display:flex;gap:8px;flex-wrap:wrap;margin-top:28px}
.pagination a,.pagination span{min-width:38px;height:38px;border:1px solid var(--line);display:inline-flex;align-items:center;justify-content:center;border-radius:4px}
.pagination .current{background:var(--brand);border-color:var(--brand);color:#fff}
.notice{padding:12px 14px;border:1px solid #eed1cd;background:#fff7f6;color:#6c302a;border-radius:6px}
@media (max-width:980px){
  .nav{display:none;position:absolute;left:0;right:0;top:78px;background:#fff;border-bottom:1px solid var(--line);padding:10px 20px;flex-direction:column;align-items:stretch;gap:0}
  .nav.open{display:flex}.nav a{padding:12px 0}.nav a.active:after{display:none}
  .header-cta{display:none}.menu-btn{display:block}
  .grid.cols-4{grid-template-columns:repeat(2,1fr)}
  .grid.cols-3{grid-template-columns:repeat(2,1fr)}
  .cat-strip{grid-template-columns:repeat(3,1fr)}
  .layout{grid-template-columns:1fr}.sidebar{display:none}
  .pro-hero{grid-template-columns:1fr}
  .about-block,.contact-grid{grid-template-columns:1fr}
  .gallery{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:620px){
  .container{width:min(100% - 28px,var(--max))}
  .header-inner{height:68px}.nav{top:68px}.brand img{max-height:40px;max-width:185px}
  .hero img{height:390px}.hero-copy h1{font-size:34px}
  .section{padding:46px 0}.section-head{align-items:start;flex-direction:column}.section-head h2{font-size:27px}
  .grid.cols-4,.grid.cols-3{grid-template-columns:1fr}
  .cat-strip{grid-template-columns:repeat(2,1fr)}
  .page-hero{padding:38px 0}.page-hero h1{font-size:30px}
  .layout{padding-top:30px}.article-head h1,.pro-summary h1{font-size:29px}
  .spec-grid{grid-template-columns:1fr}
  .list-row{grid-template-columns:1fr}.list-row .thumb{height:210px}
  .cta-inner{align-items:flex-start;flex-direction:column}
  .footer-grid{grid-template-columns:1fr}
}

.legacy-media-block,.legacy-video-block{margin:34px 0}
.legacy-media-block h2,.legacy-video-block h2{font-size:26px;line-height:1.35;margin:0 0 16px;border-left:4px solid var(--brand);padding-left:12px}
.legacy-media-block img{width:100%;height:auto;max-height:760px;object-fit:contain;border-radius:8px;background:#f5f7f8}
.legacy-video-block video{display:block;width:100%;max-height:720px;background:#111;border-radius:8px;margin:14px 0}