:root{--ink:#10202a;--muted:#63717a;--line:#d7e0e4;--red:#c92732;--gold:#f2b90b;--blue:#1d75a5;--paper:#f3f7f8;--dark:#071217;--max:1180px}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;color:var(--ink);background:#fff;font-family:Arial,"Microsoft YaHei","Noto Sans SC",sans-serif;line-height:1.65}
img,video{display:block;max-width:100%}
a{color:inherit;text-decoration:none}
button{font:inherit}
.cn-header{position:sticky;top:0;z-index:50;display:flex;align-items:center;gap:22px;min-height:72px;padding:0 max(18px,calc((100vw - var(--max))/2));background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}
.cn-brand{display:flex;align-items:center;gap:10px;min-width:0;font-weight:900}
.cn-brand img{width:200px;height:66px;object-fit:contain}
.cn-domain{padding-left:14px;border-left:1px solid #c8dce5;color:#1f7ca9;font-size:17px;letter-spacing:1px;white-space:nowrap}
.cn-nav{display:flex;gap:22px;margin-left:auto;font-size:13px;font-weight:900;white-space:nowrap}
.cn-nav a:hover{color:var(--red)}
.cn-hero{position:relative;min-height:calc(100svh - 72px);display:flex;align-items:flex-end;overflow:hidden;background:var(--dark);color:#fff}
.cn-hero-bg,.cn-hero-shade{position:absolute;inset:0;width:100%;height:100%}
.cn-hero-bg{object-fit:cover;object-position:center}
.cn-hero-shade{background:linear-gradient(90deg,rgba(4,16,22,.92),rgba(4,16,22,.42) 58%,rgba(4,16,22,.14)),linear-gradient(0deg,rgba(4,16,22,.96),transparent 58%)}
.cn-hero-inner{position:relative;z-index:2;width:min(var(--max),calc(100% - 48px));margin:auto;padding:36px 0 38px}
.cn-kicker{margin:0 0 9px;color:var(--gold);font-size:12px;font-weight:900;letter-spacing:2px}
.cn-hero h1{max-width:760px;margin:0;color:#fff;font-size:clamp(38px,5vw,66px);line-height:1.08}
.cn-hero h1 span{color:var(--gold)}
.cn-hero p:not(.cn-kicker){max-width:640px;margin:18px 0 0;color:#dce8ec;font-size:17px}
.cn-hero-actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}
.cn-button{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:0 18px;background:var(--red);color:#fff;font-size:14px;font-weight:900}
.cn-button.alt{background:#fff;color:var(--ink)}
.cn-band{background:var(--ink);color:#fff}
.cn-band-inner{width:min(var(--max),calc(100% - 48px));margin:auto;display:grid;grid-template-columns:repeat(3,1fr)}
.cn-band span{padding:15px 18px;border-right:1px solid rgba(255,255,255,.16);font-size:13px}
.cn-band span:last-child{border-right:0}
.cn-band b{display:block;color:var(--gold);font-size:16px}
.cn-section{width:min(var(--max),calc(100% - 48px));margin:auto;padding:56px 0}
.cn-section.alt{width:100%;padding-left:max(24px,calc((100vw - var(--max))/2));padding-right:max(24px,calc((100vw - var(--max))/2));background:var(--paper)}
.cn-section-head{display:flex;align-items:end;justify-content:space-between;gap:18px;margin-bottom:22px}
.cn-section h2{margin:0;color:var(--ink);font-size:34px;line-height:1.15}
.cn-section h2:after{display:block;width:58px;height:3px;margin-top:9px;content:"";background:var(--red)}
.cn-section-head p{max-width:600px;margin:0;color:var(--muted);font-size:14px}
.cn-feature-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.cn-feature{position:relative;min-height:340px;overflow:hidden;background:var(--dark);border:1px solid var(--line)}
.cn-feature img{width:100%;height:340px;object-fit:cover;transition:transform .35s}
.cn-feature:hover img{transform:scale(1.03)}
.cn-feature:after{position:absolute;inset:0;content:"";background:linear-gradient(0deg,rgba(4,16,22,.96),rgba(4,16,22,.08) 67%)}
.cn-feature-copy{position:absolute;z-index:2;left:24px;right:24px;bottom:22px;color:#fff}
.cn-feature-copy small{color:var(--gold);font-weight:900;letter-spacing:1.5px}
.cn-feature-copy h3{margin:7px 0 5px;font-size:28px}
.cn-feature-copy p{margin:0;max-width:480px;color:#dce8ec;font-size:14px}
.cn-feature-copy strong{display:inline-flex;margin-top:14px;padding:9px 13px;background:var(--red);font-size:13px}
.cn-content-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.cn-card{padding:20px;background:#fff;border:1px solid var(--line)}
.cn-card h3{margin:0 0 8px;font-size:18px}
.cn-card p{margin:0;color:var(--muted);font-size:14px}
.cn-specs{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.cn-spec{padding:18px;background:#102b38;color:#fff}
.cn-spec b{display:block;color:var(--gold);font-size:23px}
.cn-spec span{display:block;margin-top:4px;color:#dce8ec;font-size:13px}
.cn-contact{background:var(--dark);color:#fff}
.cn-contact .cn-section{display:grid;grid-template-columns:1fr 1fr;gap:46px}
.cn-contact p{color:#c8d4d8}
.cn-contact a{font-weight:900}
.cn-footer{display:flex;justify-content:space-between;padding:24px max(24px,calc((100vw - var(--max))/2));background:#030b0f;color:#aebcc1;font-size:11px}
.detail-hero-cn{width:min(var(--max),calc(100% - 48px));margin:auto;padding:48px 0 34px;display:grid;grid-template-columns:1fr 1fr;gap:42px;align-items:center}
.detail-hero-cn>img{width:100%;height:420px;object-fit:cover;border:1px solid var(--line)}
.detail-hero-cn h1{margin:0;color:var(--ink);font-size:clamp(38px,5vw,58px);line-height:1.1}
.detail-hero-cn .lead{margin:18px 0 0;color:var(--muted);font-size:17px}
.detail-hero-cn .back-cn{display:inline-block;margin-bottom:18px;color:var(--muted);font-size:13px;font-weight:900}
.gallery-cn{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.gallery-cn figure{margin:0;overflow:hidden;background:#fff;border:1px solid var(--line)}
.gallery-cn img{width:100%;height:210px;object-fit:cover}
.gallery-cn figcaption{padding:9px;color:var(--ink);font-size:13px;font-weight:900}
.video-layout-cn{display:grid;grid-template-columns:1.35fr .65fr;gap:16px;align-items:start}
.video-box-cn{padding:10px;background:#071217;border:1px solid #1e3b49}
.video-box-cn video{width:100%;aspect-ratio:16/9;background:#000}
.video-layout-cn.full-video{display:block}
.video-layout-cn.full-video .video-box-cn{padding:0;border:0}
.video-layout-cn.full-video .video-box-cn video{width:100%;height:min(78vh,760px);min-height:420px;aspect-ratio:auto;object-fit:cover;object-position:center 38%;background:#000}
.video-layout-cn.full-video .video-note-cn{margin-top:14px}
.voice-actions-cn{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.voice-actions-cn button{min-height:42px;padding:0 15px;border:0;background:var(--red);color:#fff;font-weight:900;cursor:pointer}
.voice-actions-cn button.secondary{background:var(--ink)}
.voice-status-cn{margin:10px 0 0;color:var(--muted);font-size:13px}
.video-note-cn{padding:18px;background:#fff;border:1px solid var(--line)}
.video-note-cn h3{margin:0 0 8px}
.video-note-cn p{margin:0;color:var(--muted);font-size:14px}
.pager-cn{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.pager-cn button{min-width:42px;height:38px;border:1px solid var(--line);background:#fff;color:var(--ink);font-weight:900;cursor:pointer}
.pager-cn button.active,.pager-cn button:hover{border-color:var(--red);background:var(--red);color:#fff}
.pet-page[hidden]{display:none}
.pet-page{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.pet-page figure{margin:0;background:#fff;border:1px solid var(--line)}
.pet-page img{width:100%;height:245px;object-fit:cover}
.pet-page figcaption{padding:8px 10px;color:var(--muted);font-size:12px;font-weight:900}
.cert-grid-cn{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.cert-card-cn{padding:10px;background:#fff;border:1px solid var(--line)}
.cert-card-cn img{width:100%;height:260px;object-fit:contain;background:#f8fbfc}
.cert-card-cn strong{display:block;padding:9px 2px 2px;font-size:14px}
.cert-card-cn p{margin:0;padding:0 2px 6px;color:var(--muted);font-size:12px}
.cert-card-cn a{display:inline-block;padding:7px 9px;background:var(--red);color:#fff;font-size:12px;font-weight:900}
.pdf-card-cn{display:grid;gap:8px;padding:18px;background:#fff;border:1px solid var(--line)}
.pdf-card-cn b{font-size:16px}
.pdf-card-cn span{color:var(--muted);font-size:13px}
.material-strip-cn{display:grid;grid-template-columns:repeat(5,1fr);gap:10px}
.material-strip-cn figure{margin:0;background:#fff;border:1px solid var(--line)}
.material-strip-cn img{width:100%;height:170px;object-fit:cover}
.material-strip-cn figcaption{padding:7px 8px;font-size:12px;font-weight:900}
.model-grid-cn{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.model-card-cn{padding:22px;background:#0e2530;color:#fff;border-top:4px solid var(--gold)}
.model-card-cn h3{margin:0;color:var(--gold);font-size:25px}
.model-card-cn p{margin:8px 0 0;color:#d8e5e9;font-size:14px}
.model-card-cn ul{margin:14px 0 0;padding-left:20px;color:#d8e5e9;font-size:13px}
.tech-table-cn{width:100%;border-collapse:collapse;background:#fff}
.tech-table-cn th,.tech-table-cn td{padding:12px;border:1px solid var(--line);text-align:left;vertical-align:top;font-size:13px}
.tech-table-cn th{width:22%;background:#102b38;color:#fff}
.source-note-cn{margin-top:18px;padding:12px 14px;background:#fff4cf;border-left:4px solid var(--gold);color:#66520a;font-size:13px}
@media(max-width:860px){.cn-nav{display:none}.cn-domain{display:none}.cn-feature-grid,.cn-contact .cn-section,.detail-hero-cn,.video-layout-cn{grid-template-columns:1fr}.cn-content-grid,.cert-grid-cn{grid-template-columns:1fr 1fr}.cn-specs{grid-template-columns:repeat(2,1fr)}.gallery-cn{grid-template-columns:repeat(3,1fr)}.pet-page{grid-template-columns:repeat(3,1fr)}.material-strip-cn{grid-template-columns:repeat(3,1fr)}.model-grid-cn{grid-template-columns:1fr}}
@media(max-width:560px){.cn-header{min-height:62px;padding:0 14px}.cn-brand img{width:168px;height:48px}.cn-hero-inner,.cn-section,.detail-hero-cn{width:calc(100% - 28px)}.cn-hero h1{font-size:36px}.cn-hero p:not(.cn-kicker){font-size:15px}.cn-band-inner{width:100%;grid-template-columns:1fr}.cn-band span{border-right:0;border-bottom:1px solid rgba(255,255,255,.16)}.cn-section,.cn-section.alt{padding-top:40px;padding-bottom:40px}.cn-section-head{display:block}.cn-section-head p{margin-top:12px}.cn-section h2{font-size:28px}.cn-content-grid,.cert-grid-cn,.gallery-cn,.pet-page,.material-strip-cn{grid-template-columns:1fr 1fr}.cn-feature,.cn-feature img{min-height:280px;height:280px}.cn-feature-copy h3{font-size:23px}.cn-specs{grid-template-columns:1fr 1fr}.detail-hero-cn{padding-top:30px}.detail-hero-cn>img{height:280px}.detail-hero-cn h1{font-size:38px}.gallery-cn img{height:170px}.pet-page img{height:210px}.cert-card-cn img{height:220px}.cn-contact .cn-section{gap:22px}.cn-footer{display:grid;gap:6px}}
@media(max-width:560px){.video-layout-cn.full-video .video-box-cn video{height:52vh;min-height:250px;object-position:center 35%}}

/* BEGIN mobile-nav-fix 20261006 v4 (append-only; rollback = cp -a /www/backup/materials.css.20261006-113051 over the live file) */
@media(max-width:860px){
.cn-header{flex-wrap:wrap;min-height:0;padding:8px 12px 10px;row-gap:6px;column-gap:12px}
.cn-brand img{width:146px;height:42px}
.cn-brand{gap:8px;min-width:0}
.cn-nav{display:flex;flex-wrap:wrap;gap:6px 10px;margin-left:0;width:100%;max-width:100%;min-width:0;order:2;font-size:11px;font-weight:700;white-space:normal;overflow-x:auto}
.cn-nav a{flex:0 0 auto}
.cn-hero h1{font-size:25px;line-height:1.15;overflow-wrap:anywhere}
.cn-hero-inner{padding:24px 0 26px}
.cn-hero{min-height:calc(100svh - 112px)}
}
@media(max-width:420px){.cn-nav{gap:5px 8px;font-size:10.5px}}
/* END mobile-nav-fix 20261006 *//* BEGIN 20261006 inner-page image size fix (append-only; rollback = cp -a /www/backup/materials.css.pre-imgfix.<TS> over the live file) */
.detail-hero-cn>img{height:320px !important;width:auto !important;max-width:100% !important;object-fit:contain !important;margin:0 auto !important;background:#fff}
.detail-hero-cn{gap:32px}
.cn-feature img{height:250px}
.gallery-cn img{height:168px}
.pet-page img{height:190px}
.material-strip-cn img{height:140px}
.cert-card-cn img{height:230px}
@media(max-width:560px){.detail-hero-cn>img{height:200px !important}.cn-feature,.cn-feature img{height:210px;min-height:210px}.gallery-cn img{height:140px}.pet-page img{height:160px}}
/* END 20261006 inner-page image size fix */

/* BEGIN license-band 20261007 (营业执照条；回滚=删除本段) */
.license-band{display:flex;align-items:center;gap:18px;width:min(var(--max),calc(100% - 36px));margin:0 auto;padding:18px 0 24px}
.license-band a{flex:0 0 auto;display:block}
.license-band img{width:150px;height:96px;object-fit:contain;background:#fff;border:1px solid var(--line);padding:4px;box-shadow:0 6px 16px rgba(5,35,48,.07)}
.license-band b{display:block;color:var(--ink);font-size:16px;font-weight:900}
.license-band span{display:block;color:var(--muted);font-size:13px;line-height:1.6}
@media(max-width:560px){.license-band{align-items:flex-start;gap:12px;padding:14px 0 18px}.license-band img{width:112px;height:74px}.license-band span{font-size:12px}}
/* END license-band 20261007 */

/* BEGIN contact-contrast-fix 20261007 (深色联系区标题发暗看不见；回滚=删除本段) */
.cn-contact .cn-section h2{color:#fff}
.cn-contact .cn-section h2:after{background:var(--gold)}
.cn-contact .cn-kicker{color:var(--gold)}
.cn-contact p{color:#cfdbe0}
/* END contact-contrast-fix 20261007 */