/* Product navigation and detail pages / 产品导航与详情页 */
.header nav{align-items:center;margin-left:auto}
.nav-products{position:relative}
.nav-products summary{display:flex;align-items:center;gap:9px;cursor:pointer;list-style:none;color:#697583;padding:18px 0}
.nav-products summary::-webkit-details-marker{display:none}
.nav-products summary::after{content:'';width:5px;height:5px;border-right:1px solid;border-bottom:1px solid;transform:rotate(45deg);margin-top:-4px}
.nav-products[open] summary{color:#121b29}
.nav-products[open] summary::after{transform:rotate(225deg);margin-top:2px}
.product-submenu{position:absolute;top:100%;left:-24px;min-width:290px;background:#fff;border:1px solid #dfe3e8;padding:10px 24px 18px;box-shadow:0 14px 28px #17212d0a}
.header nav .product-submenu a{display:block;padding:12px 0;white-space:normal;line-height:1.5}
.product-submenu a+a{border-top:1px solid #e7eaee}
.product-submenu small{display:block;font-size:12px;margin-top:5px;color:#7b8796;font-weight:400}
.detail-main{padding-top:92px}
.page-shell{max-width:1440px;margin:0 auto;padding:0 var(--space)}
.breadcrumb{display:flex;gap:12px;flex-wrap:wrap;font-size:12px;color:#7c8795;padding:30px 0 0;line-height:1.7}
.breadcrumb a:hover{color:#17212d}
.breadcrumb span[aria-current]{color:#435160}
.detail-intro{padding:70px 0 66px;max-width:950px}
.detail-intro .eyebrow{margin-bottom:22px}
.detail-intro h1{font-size:clamp(34px,4.3vw,60px);line-height:1.28;letter-spacing:-1.5px}
.detail-intro>p:not(.eyebrow){font-size:18px;color:#687584;max-width:840px;line-height:1.9;margin-top:28px}
.product-list{border-top:1px solid #d7dee5;padding:48px 0 90px}
.catalog-product{display:grid;grid-template-columns:1.25fr 1fr;gap:55px;align-items:center}
.catalog-image{display:block;background:#f1f3f5;overflow:hidden}
.catalog-image img{width:100%;display:block;aspect-ratio:22/15;object-fit:contain;transition:transform .35s}
.catalog-image:hover img{transform:scale(1.025)}
.catalog-copy h2{font-size:38px;letter-spacing:-1px;margin:15px 0 22px}
.catalog-copy>p{font-size:16px;line-height:1.9;color:#687584}
.catalog-facts{display:grid;grid-template-columns:repeat(3,1fr);padding:25px 0 0;margin-top:28px;border-top:1px solid #d7dee5;gap:15px}
.catalog-facts div{display:flex;flex-direction:column;gap:5px}
.catalog-facts dt{font-size:12px;color:#7a8695}
.catalog-facts dd{margin:0;font-size:22px;line-height:1.4}
.product-detail-visual{background:#f1f3f5;display:grid;grid-template-columns:1.6fr 1fr;align-items:center;margin-bottom:70px;padding:28px 40px 22px;gap:40px}
.product-detail-visual img{display:block;width:100%;height:auto}
.product-detail-visual figcaption{font-size:12px;color:#7c8795}
.product-detail-visual .catalog-facts{display:flex;flex-direction:column;margin:0;border:0;gap:20px;padding:0}
.product-detail-visual .catalog-facts div{border-bottom:1px solid #d1d8e0;padding-bottom:18px}
.product-detail-visual dd{font-size:34px}
.detail-section{display:grid;grid-template-columns:.8fr 1.4fr;gap:90px;padding:45px 0;border-top:1px solid #d7dee5}
.detail-section h2{font-size:26px;letter-spacing:-.4px}
.detail-section p{color:#617080;line-height:1.95;margin-bottom:16px}
.detail-section p:last-child{margin-bottom:0}
.detail-section ul{padding-left:19px;margin:0;color:#617080}
.detail-section li{margin:9px 0;padding-left:5px}
.full-specs{padding:48px 0 60px;border-top:1px solid #d7dee5;scroll-margin-top:105px}
.full-specs h2,.detail-faq h2{font-size:28px;margin-bottom:26px}
.full-specs .spec-body{padding:0}
.detail-faq{padding:48px 0 65px;border-top:1px solid #d7dee5}
.faq-list{max-width:920px}
.faq-list article{padding:22px 0;border-bottom:1px solid #e0e5eb}
.faq-list h3{font-size:18px;margin-bottom:12px}
.faq-list p{font-size:16px;line-height:1.9;color:#617080}
.related-pages{padding:45px 0 65px;border-top:1px solid #d7dee5}
.related-pages h2{font-size:20px;margin-bottom:20px}
.related-links{display:flex;gap:20px 36px;flex-wrap:wrap}
.related-links a{font-size:14px;border-bottom:1px solid #a4afbb;padding-bottom:5px}
.detail-main .button{margin-top:28px}
.error-page{min-height:75vh;padding:190px var(--space) 90px}
.error-page h1{font-size:50px}.error-page p{margin:20px 0;color:#687584}
@media(min-width:881px){.header{gap:27px}.header nav{gap:24px}}
@media(max-width:1100px) and (min-width:881px){.header{gap:18px}.header nav{gap:16px}.brand>img{width:185px}.header nav{font-size:13px}}
@media(max-width:880px){.header>.language-switch{margin-left:auto}.header nav{align-items:stretch}.nav-products summary{padding:12px 0}.product-submenu{position:static;min-width:0;box-shadow:none;border:0;border-left:1px solid #d7dee5;margin:0 0 10px 2px;padding:0 0 0 20px}.header nav.is-open{max-height:calc(100svh - 80px);overflow:auto}.detail-main{padding-top:80px}.detail-intro{padding:50px 0}.catalog-product{grid-template-columns:1fr;gap:32px}.catalog-copy{max-width:620px}.detail-section{grid-template-columns:1fr;gap:24px;padding:34px 0}.product-detail-visual{gap:20px;padding:24px}.detail-intro>p:not(.eyebrow){font-size:17px}}
@media(max-width:560px){.breadcrumb{padding-top:22px;gap:8px;font-size:12px}.detail-intro{padding:40px 0}.detail-intro h1{font-size:34px;letter-spacing:-.7px}.detail-intro>p:not(.eyebrow){font-size:16px;margin-top:20px}.product-list{padding-top:30px;padding-bottom:54px}.catalog-copy h2{font-size:30px}.catalog-facts{gap:8px}.catalog-facts dd{font-size:19px}.product-detail-visual{grid-template-columns:1fr;padding:18px;margin-bottom:40px}.product-detail-visual .catalog-facts{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.product-detail-visual dd{font-size:24px}.detail-section h2{font-size:24px}.full-specs,.detail-faq{padding:35px 0 45px}.full-specs h2,.detail-faq h2{font-size:25px}.related-pages{padding:30px 0 45px}}
.catalog-image img{height:auto}

/* Engineering scope and project information / 技术范围与项目信息 */
.service-brief{margin:24px 0 0;font-size:14px;line-height:1.85}
.service-brief>div{display:grid;grid-template-columns:100px 1fr;gap:16px;padding:13px 0;border-top:1px solid #e3e7ec}
.service-brief dt{color:#7c8795}.service-brief dd{margin:0;color:#485768}
.expertise-description .text-link{margin-top:19px}
.stage-checks{padding-left:19px;margin:22px 0;color:#637286;font-size:15px;line-height:1.9}.stage-checks li{padding:5px 0 5px 3px}
.stage-content [role=tabpanel]>p.stage-output{padding-top:18px;margin-top:23px;border-top:1px solid #d7dee7;font-size:13px;color:#34475c}
.project-scope{background:#f1f3f5}.project-scope .section-heading{align-items:start}
.project-stages{display:grid;grid-template-columns:repeat(4,1fr);gap:0;list-style:none;margin:0;padding:0;border-top:1px solid #cbd4de}
.project-stages>li{padding:30px 28px 0 0;display:flex;flex-direction:column}.project-stages>li+li{padding-left:28px;border-left:1px solid #d7dee5}
.step-index{font-size:12px;color:#7d8a99;margin-bottom:27px}.project-stages h3{font-size:22px;line-height:1.4;margin-bottom:18px}.project-stages>li>p{font-size:15px;color:#647182;line-height:1.9;margin-bottom:30px}
.step-output{margin-top:auto;padding-top:20px;border-top:1px solid #d7dee5}.step-output>span{font-size:11px;color:#7d8a99}.step-output p{font-size:14px;color:#344458;line-height:1.8;margin-top:7px}
.company-facts{display:grid;grid-template-columns:repeat(2,1fr);gap:0 55px;margin:0 0 48px;border-top:1px solid #d7dce3}.company-facts>div{display:grid;grid-template-columns:110px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid #d7dce3}.company-facts dt{font-size:13px;color:#7c8795}.company-facts dd{font-size:14px;line-height:1.8;margin:0;color:#475668}
@media(max-width:880px){.project-stages{grid-template-columns:repeat(2,1fr);row-gap:35px}.project-stages>li:nth-child(3){padding-left:0;border-left:0}.company-facts{gap:0 25px}.company-facts>div{grid-template-columns:1fr;gap:8px}}
@media(max-width:560px){.service-brief>div{grid-template-columns:1fr;gap:4px;padding:15px 0}.service-brief dt{font-size:12px}.service-brief dd{font-size:15px}.project-stages{grid-template-columns:1fr;gap:0}.project-stages>li,.project-stages>li+li{padding:25px 0;border-left:0;border-bottom:1px solid #cbd4de}.step-index{margin-bottom:13px}.project-stages h3{font-size:24px;margin-bottom:13px}.project-stages>li>p{font-size:16px;margin-bottom:20px}.step-output{padding-top:14px}.company-facts{grid-template-columns:1fr}.company-facts>div{grid-template-columns:82px 1fr;gap:18px}.company-facts dd{font-size:14px}.stage-checks{font-size:15px}}
.service-outline{display:flex;flex-wrap:wrap;gap:10px 28px;padding:22px 0 30px;border-top:1px solid #d7dee5;font-size:12px;line-height:1.8;color:#647487}
.service-outline>span{color:#8994a2;width:100%;font-size:11px;letter-spacing:.6px}.service-outline a:hover{color:#17212d;text-decoration:underline;text-underline-offset:4px}
.detail-section[id]{scroll-margin-top:108px}.scope-table table{border-collapse:collapse;width:100%;text-align:left;font-size:14px;line-height:1.9}.scope-table caption{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%)}.scope-table th,.scope-table td{padding:17px 18px 17px 0;vertical-align:top;border-bottom:1px solid #dfe5eb}.scope-table thead th{font-size:12px;color:#8190a1;font-weight:400;padding-top:0}.scope-table tbody th{width:24%;font-weight:400;color:#35485b;min-width:90px}.scope-table td{color:#617080;padding-right:0}
@media(max-width:560px){.service-outline{flex-direction:column;align-items:flex-start;padding-bottom:25px}.service-outline a{padding:4px 0}.scope-table table{font-size:14px}.scope-table tbody th{width:30%;padding-right:15px}.scope-table th,.scope-table td{padding-top:15px;padding-bottom:15px}}

/* Mobile base and R&D emphasis / 底盘与研发主线 */
.chassis-hero .hero-art{object-fit:contain;object-position:center;filter:none;background:#f1f3f5}
.focus-rail{grid-template-columns:repeat(2,1fr)}
.interface-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;padding:27px 0 34px;margin:0;border-top:1px solid #d7dee5}
.interface-strip>div+div{border-left:1px solid #d7dee5;padding-left:30px}.interface-strip dt{font-size:12px;color:#7c8795;margin-bottom:8px}.interface-strip dd{font-size:23px;color:#344458;margin:0;line-height:1.5}
@media(max-width:560px){.interface-strip{gap:10px;padding:24px 0}.interface-strip>div+div{padding-left:12px}.interface-strip dd{font-size:17px}.interface-strip dt{font-size:12px}.focus-rail{display:block}.chassis-hero .hero-art-label{font-size:10px;gap:12px}}

/* WCR product launch / 社区收运产品展示 */
.product-status{display:inline-block;font-size:12px;line-height:1.5;color:#54677d;border:1px solid #cbd5df;padding:6px 10px;letter-spacing:.2px}
.catalog-product+.catalog-product{border-top:1px solid #d7dee5;margin-top:65px;padding-top:65px}.catalog-wcr .product-status{margin-top:16px}.catalog-wcr .catalog-image img{aspect-ratio:1/1}.catalog-wcr .catalog-facts dd{font-size:20px}
.wcr-hero{display:grid;grid-template-columns:1fr 1.13fr;gap:60px;align-items:center;padding:55px 0 65px}.wcr-hero .eyebrow{font-size:11px;margin-bottom:20px}.wcr-hero h1{font-size:clamp(48px,5.2vw,76px);letter-spacing:-2.2px;line-height:1.15;margin:26px 0 23px}.wcr-hero h1 span{display:block;font-size:clamp(23px,2.3vw,34px);letter-spacing:-.6px;line-height:1.4;margin-top:14px}.wcr-tagline{font-size:24px;line-height:1.5;color:#24374a;margin:0 0 18px}.wcr-intro{font-size:16px;line-height:1.95;color:#687584}.wcr-actions{display:flex;gap:24px;align-items:center;flex-wrap:wrap;margin-top:28px}.wcr-actions .button{margin:0}.wcr-actions .text-link{font-size:13px}.wcr-hero-image,.wcr-photo{margin:0}.wcr-hero-image img{display:block;width:100%;height:auto}.wcr-hero-image figcaption,.wcr-photo figcaption{font-size:11px;color:#7c8795;margin-top:12px}
.wcr-highlights{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;border-block:1px solid #cfd8e1;margin:0;padding:30px 0 34px}.wcr-highlights>div+div{border-left:1px solid #d7dee5;padding-left:35px}.wcr-highlights dt{font-size:12px;color:#758394;margin-bottom:12px}.wcr-highlights dd{font-size:45px;line-height:1.2;letter-spacing:-1.2px;margin:0}.wcr-highlights dd span{font-size:19px;letter-spacing:0}.wcr-highlights dd.wcr-text-value{font-size:30px;letter-spacing:-.5px;padding-top:9px}
.wcr-story{display:grid;grid-template-columns:1fr 1.1fr;gap:75px;align-items:center;padding:90px 0;border-bottom:1px solid #d7dee5}.wcr-story h2{font-size:clamp(28px,3vw,42px);letter-spacing:-1px;line-height:1.4;margin:21px 0 30px}.wcr-story h3{font-size:18px;line-height:1.6;margin:25px 0 12px}.wcr-story-copy>p:not(.eyebrow){font-size:16px;line-height:1.95;color:#687584}.wcr-story-reverse .wcr-story-copy{order:2}.wcr-story-reverse .wcr-photo{order:1}.wcr-photo img{width:100%;height:auto;display:block}.wcr-feature-tags{list-style:none;padding:0;margin:28px 0 0;display:flex;flex-wrap:wrap;gap:9px}.wcr-feature-tags li{border:1px solid #d7dee5;font-size:12px;color:#586a7f;padding:6px 10px}.wcr-inspection-flow{border-top:1px solid #d7dee5;padding-top:24px;margin-top:25px}
.wcr-workflow{padding:75px 0 80px;border-bottom:1px solid #d7dee5}.wcr-section-heading{max-width:860px;margin-bottom:40px}.wcr-section-heading h2,.wcr-specifications h2{font-size:clamp(28px,3vw,38px);letter-spacing:-.8px;line-height:1.45;margin:18px 0}.wcr-section-heading>p:not(.eyebrow),.wcr-specifications>div>p:not(.eyebrow){color:#687584;font-size:16px;line-height:1.9}.wcr-workflow ol{display:grid;grid-template-columns:repeat(4,1fr);list-style:none;padding:0;margin:0;gap:28px}.wcr-workflow li{border-top:1px solid #aebdcb;padding-top:23px}.wcr-workflow .step-index{display:block;margin-bottom:18px}.wcr-workflow h3{font-size:20px;margin-bottom:12px;line-height:1.4}.wcr-workflow li p{font-size:14px;color:#687584;line-height:1.9}
.wcr-specifications{display:grid;grid-template-columns:1fr 1.4fr;gap:85px;padding:80px 0}.wcr-specifications table{border-collapse:collapse;width:100%;font-size:14px;line-height:1.7}.wcr-specifications caption{text-align:left;font-size:13px;color:#758394;margin-bottom:16px}.wcr-specifications th,.wcr-specifications td{border-bottom:1px solid #d7dee5;vertical-align:top;text-align:left;padding:17px 0;font-weight:400}.wcr-specifications th{width:46%;padding-right:22px;color:#738191}.wcr-specifications td{color:#34475a}.wcr-specifications>div>p.wcr-note{font-size:12px;line-height:1.8;margin-top:22px;color:#7c8795}.wcr-main section[id]{scroll-margin-top:105px}
.wcr-home-teaser{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;padding:65px var(--space);background:#f1f3f5;border-block:1px solid #d7dee5}.wcr-home-teaser img{width:100%;height:auto;max-width:500px;justify-self:center}.wcr-home-teaser h2{font-size:clamp(28px,3vw,42px);letter-spacing:-1px;line-height:1.4;margin:18px 0}.wcr-home-teaser p:not(.eyebrow){font-size:16px;line-height:1.9;color:#687584;max-width:560px}.wcr-home-teaser .text-link{margin-top:24px}
@media(max-width:1000px){.wcr-hero{gap:35px}.wcr-story{gap:40px}.wcr-workflow ol{grid-template-columns:repeat(2,1fr);gap:35px}.wcr-specifications{gap:40px}}
@media(max-width:760px){.wcr-hero{grid-template-columns:1fr;padding:40px 0;gap:34px}.wcr-hero-copy{max-width:600px}.wcr-hero h1{font-size:52px}.wcr-hero h1 span{font-size:27px}.wcr-hero-image{max-width:620px}.wcr-story{grid-template-columns:1fr;gap:30px;padding:55px 0}.wcr-story-reverse .wcr-story-copy,.wcr-story-reverse .wcr-photo{order:initial}.wcr-specifications{grid-template-columns:1fr;gap:30px;padding:55px 0}.wcr-home-teaser{grid-template-columns:1fr;gap:28px;padding-block:45px}.wcr-home-teaser img{max-width:520px}.wcr-highlights dd{font-size:36px}.wcr-highlights dd.wcr-text-value{font-size:23px}.wcr-highlights>div+div{padding-left:20px}.wcr-story h2 br{display:none}}
@media(max-width:480px){.wcr-hero h1{font-size:48px}.wcr-hero h1 span{font-size:25px}.wcr-tagline{font-size:22px}.wcr-hero .eyebrow{letter-spacing:.8px}.wcr-actions{gap:18px}.wcr-highlights{gap:12px;padding:25px 0}.wcr-highlights>div+div{padding-left:12px}.wcr-highlights dd{font-size:29px}.wcr-highlights dd span{font-size:15px}.wcr-highlights dd.wcr-text-value{font-size:19px;padding-top:4px}.wcr-highlights dt{font-size:11px}.wcr-workflow{padding:50px 0}.wcr-workflow ol{grid-template-columns:1fr;gap:25px}.wcr-workflow h3{font-size:22px}.wcr-workflow li p{font-size:16px}.wcr-story h2{font-size:29px}.catalog-product+.catalog-product{margin-top:45px;padding-top:45px}}