*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:105px}body{margin:0;color:var(--ink);font-family:var(--font-body);font-size:16px;line-height:1.8;background:var(--white)}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;max-width:100%}button,a,summary{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:6px}::selection{background:var(--navy);color:white}.wrap{width:min(var(--content-width),calc(100% - 96px));margin:auto}.skip-link{position:fixed;top:-100px;left:20px;background:white;color:var(--navy);z-index:100;padding:12px}.skip-link:focus{top:12px}.eyebrow{font-size:.875rem;letter-spacing:.19em;font-weight:600;text-transform:uppercase;margin:0 0 17px}.section-title{font:normal clamp(2rem,3.5vw,2.8rem)/1.35 var(--font-heading);margin:0}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;margin-bottom:42px}.section-heading .eyebrow{color:var(--blue)}.section-heading>p{max-width:420px;color:var(--muted);margin:0}section{scroll-margin-top:10px}.site-header{position:sticky;top:0;z-index:20;background:var(--navy);color:white;border-bottom:1px solid #ffffff25}.header-inner{min-height:96px;display:flex;align-items:center;justify-content:space-between;gap:30px}.brand{display:flex;align-items:center;gap:16px;min-width:0}.brand-mark{width:54px;height:54px;display:grid;place-items:center;border:1px solid #ffffff80;font-family:var(--font-heading);font-size:2rem;flex-shrink:0}.brand-logo{width:64px;height:54px;object-fit:contain}.brand-name{font-family:var(--font-heading);font-size:1.3rem;line-height:1.5;letter-spacing:.06em}.brand-sub{font-size:.8125rem;color:#d0dce6;letter-spacing:.2em}.nav{display:flex;align-items:stretch;gap:34px;align-self:stretch}.nav a{display:flex;align-items:center;position:relative;white-space:nowrap;font-size:1rem}.nav a:after{content:'';height:2px;position:absolute;bottom:21px;left:0;right:0;background:var(--accent);transform:scaleX(0);transition:transform .2s}.nav a:hover:after,.nav a[aria-current]:after{transform:scaleX(1)}.menu-toggle{display:none;background:transparent;border:1px solid #ffffff80;color:white;padding:7px 14px}.hero{min-height:660px;height:calc(100svh - 130px);max-height:850px;position:relative;isolation:isolate;overflow:hidden;background:var(--navy-deep);color:white;display:flex;align-items:center}.hero-image{position:absolute;inset:0 0 0 auto;width:73%;height:100%;object-fit:cover;object-position:50% 48%;z-index:-3}.hero:after{content:'';position:absolute;inset:0;background:linear-gradient(90deg,#071f33 0%,#071f33ed 29%,#071f3394 48%,#071f330a 73%),linear-gradient(0deg,#071f338a,transparent 35%);z-index:-2}.hero-copy{max-width:550px;padding:75px 0 135px}.hero .eyebrow{color:#e1c68f}.hero h1{font:normal clamp(2.7rem,4.5vw,4.65rem)/1.4 var(--font-heading);letter-spacing:.05em;margin:0 0 25px}.hero h1 span{display:block}.hero-description{max-width:380px;color:#dae3eb;margin:0 0 36px;font-size:1.0625rem;line-height:2}.hero-actions{display:flex;flex-wrap:wrap;gap:15px}.button{display:inline-flex;align-items:center;justify-content:center;gap:28px;border:1px solid transparent;padding:12px 25px;min-height:50px;font-size:.9375rem;transition:background .2s,color .2s}.button-light{background:white;color:var(--navy)}.button-light:hover{background:var(--accent)}.button-outline{border-color:#ffffff75;color:white;background:transparent}.button-outline:hover{background:#ffffff15}.button-dark{background:var(--navy);color:white}.button-dark:hover{background:var(--blue)}.hero-bottom{position:absolute;bottom:0;left:0;right:0}.hero-bottom-inner{display:flex;align-items:center;justify-content:space-between;padding:22px 0;border-top:1px solid #ffffff45;font-size:.875rem;gap:20px}.hero-bottom-inner p{margin:0}.hero-bottom a{color:#fff}.hero-number{font-size:1.25rem;margin-right:12px;color:var(--accent)}.about{padding:95px 0 88px}.about-layout{display:grid;grid-template-columns:1fr 1.08fr;gap:80px}.about-heading{font:normal clamp(1.8rem,3vw,2.6rem)/1.7 var(--font-heading);white-space:pre-line;margin:0;color:var(--navy)}.about-text p{margin:0 0 20px;color:var(--muted)}.facts{margin:45px 0 0;padding:24px 0 0;border-top:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr;gap:32px}.facts dt{color:var(--muted);font-size:.875rem;margin-bottom:6px}.facts dd{margin:0;font-size:1.05rem;color:var(--navy)}.products{background:var(--surface);padding:85px 0 95px}.product-list{display:grid;gap:35px}.product{display:grid;grid-template-columns:1fr 1fr;background:white;border:1px solid var(--line)}.product-photo{margin:0;position:relative;background:#e4eaee;display:flex;align-items:center;justify-content:center;min-height:550px;overflow:hidden}.product-photo img{width:100%;height:600px;object-fit:contain}.product-photo figcaption{position:absolute;bottom:0;left:0;background:var(--navy);color:white;font-size:.8125rem;padding:8px 20px;letter-spacing:.06em}.product-content{padding:45px 42px;min-width:0}.product-category{color:var(--blue);font-size:.875rem;letter-spacing:.1em;margin:0 0 10px}.product h3{font-size:clamp(2rem,3.5vw,3.2rem);letter-spacing:.015em;line-height:1.3;font-weight:500;margin:0 0 24px}.product-summary{color:var(--muted);margin:0 0 25px}.product-details{border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0 0 28px}.product-details summary{cursor:pointer;padding:16px 0;font-weight:500}.product-details[open] summary{color:var(--blue)}.product-description{font-size:.9375rem;color:var(--muted)}.specs{width:100%;border-collapse:collapse;font-size:.875rem;margin-bottom:20px}.specs caption{text-align:left;font-weight:600;margin-bottom:8px}.specs th,.specs td{text-align:left;padding:9px 12px;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.specs th{width:40%;font-weight:400;color:var(--muted)}.specs tr:nth-child(odd){background:var(--surface)}.product-note{font-size:.8125rem;color:var(--muted);margin-top:20px;line-height:1.7}.empty-products{padding:30px;background:white}.contact{background:var(--navy);color:white;padding:78px 0 80px}.contact .eyebrow{color:#e1c68f}.contact-layout{display:grid;grid-template-columns:1fr 1fr;gap:80px}.contact-description{color:#c8d7e3;margin:24px 0 0;max-width:420px}.contact-items{margin:0}.contact-item{display:grid;grid-template-columns:100px 1fr;gap:20px;border-bottom:1px solid #ffffff30;padding:18px 0}.contact-item:first-child{padding-top:0}.contact-item dt{color:#c8d7e3;font-size:.9375rem}.contact-item dd{margin:0;overflow-wrap:anywhere}.contact-item a{text-decoration:underline;text-underline-offset:5px}.pending{color:#c8d7e3}.site-footer{padding:26px 0;background:var(--navy-deep);color:#c6d3df;font-size:.8125rem}.footer-inner{display:flex;align-items:center;justify-content:space-between;gap:25px;flex-wrap:wrap}.footer-inner p{margin:0}.footer-links{display:flex;gap:24px}.footer-links a:hover{text-decoration:underline}.noscript{padding:40px}.hidden{display:none!important}
/* 外层固定，避免 sticky 被只包含页头的父容器限制。 */
#site-header{position:sticky;top:0;z-index:20}.site-header{position:relative}html{scroll-padding-top:145px}
@media(min-width:1500px){.hero-image{width:68%;object-position:50% 50%}}
@media(max-width:1100px){.wrap{width:calc(100% - 56px)}.nav{gap:22px}.brand-name{font-size:1.05rem}.brand-sub{font-size:.75rem}.brand-mark{width:45px;height:45px}.about-layout,.contact-layout{gap:40px}.product-content{padding:34px 28px}}
@media(max-width:800px){html{scroll-padding-top:100px}.wrap{width:calc(100% - 40px)}.header-inner{min-height:88px;gap:15px}.brand{gap:10px}.brand-name{font-size:1rem;max-width:250px}.brand-sub{font-size:.75rem;letter-spacing:.08em}.brand-mark{width:39px;height:43px;font-size:1.5rem}.menu-toggle{display:block;flex-shrink:0;font-size:.875rem}.nav{display:none;position:absolute;left:0;right:0;top:100%;background:var(--navy-deep);padding:15px 24px;box-shadow:0 12px 20px #0002}.nav.is-open{display:grid;grid-template-columns:1fr 1fr;gap:0 25px}.nav a{padding:13px 0}.nav a:after{bottom:8px}.hero{min-height:680px;height:auto}.hero-image{width:100%;height:100%;object-position:60% center}.hero:after{background:linear-gradient(90deg,#071f33e0,#071f3330),linear-gradient(0deg,#071f33ed,transparent 85%)}.hero-copy{padding:120px 0 160px;max-width:430px}.hero h1{font-size:clamp(2.6rem,8vw,4rem)}.hero-description{max-width:330px}.hero-bottom-inner{font-size:.8125rem}.about,.products{padding:60px 0}.section-heading{align-items:start;flex-direction:column;gap:18px;margin-bottom:32px}.about-layout,.contact-layout{grid-template-columns:1fr;gap:32px}.about-heading{font-size:2rem}.facts{margin-top:32px;gap:20px}.product{grid-template-columns:1fr}.product-photo{min-height:0}.product-photo img{height:480px}.product-content{padding:30px 24px}.product h3{font-size:2.5rem}.contact{padding:60px 0}.contact-items{margin-top:12px}.footer-inner{align-items:start;flex-direction:column;gap:15px}}
@media(max-width:420px){.wrap{width:calc(100% - 32px)}.brand-name{font-size:.875rem;letter-spacing:0;max-width:220px}.brand-mark{display:none}.brand-sub{font-size:.75rem}.menu-toggle{padding:6px 10px}.hero{min-height:650px}.hero-copy{padding-top:100px}.hero h1{font-size:2.55rem}.hero-actions{gap:12px}.button{padding:11px 17px;gap:12px}.hero-bottom-inner{align-items:start;flex-direction:column;gap:7px;padding:17px 0}.hero-number{font-size:1rem}.facts{grid-template-columns:1fr}.product-photo img{height:400px}.contact-item{grid-template-columns:85px 1fr;gap:12px}}
@media(max-width:800px){html{scroll-padding-top:135px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*{transition:none!important}}

/* 正式横版 Logo：保留原图，以展示窗口隐藏四周留白。 */
.brand-logo-frame{position:relative;display:block;width:210px;aspect-ratio:1270/478;flex-shrink:0;overflow:hidden;background:#fff;border-radius:4px}
.brand-logo-frame .brand-logo{position:absolute;max-width:none;width:131.653544%;height:auto;left:-15.748031%;top:-48.535565%}
@media(max-width:1100px){.brand-copy-with-logo{display:none}}
@media(max-width:800px){.brand-logo-frame{width:180px}}
@media(max-width:360px){.brand-logo-frame{width:160px}}

/* 产品中心扩展：仅作用于分类与目录卡片，保留原有页头和首页样式。 */
.system-nav{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:16px;margin-bottom:60px}
.system-nav a{display:flex;align-items:center;justify-content:space-between;gap:14px;padding:23px 20px;border:1px solid var(--line);background:white;color:var(--navy);transition:background .2s}
.system-nav a:hover{background:#e6eef4}.system-number{font-size:1.4rem;color:var(--blue)}.system-nav small{display:block;font-size:.875rem;color:var(--muted);margin-top:3px}
.system-group{margin-top:60px;scroll-margin-top:155px}.system-heading{display:flex;align-items:end;justify-content:space-between;gap:30px;border-top:2px solid var(--navy);padding-top:26px}.system-heading .eyebrow{color:var(--blue);margin-bottom:7px}.system-heading h3{font:normal clamp(1.65rem,3vw,2.1rem)/1.5 var(--font-heading);margin:0;color:var(--navy)}.system-heading>p{max-width:480px;color:var(--muted);margin:0;font-size:.9375rem}
.system-description{max-width:1000px;color:var(--muted);margin:22px 0 30px;line-height:1.95}.catalog-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:28px;align-items:start}
.catalog-card{display:block;min-width:0}.catalog-card .product-photo{height:280px;min-height:0;padding:20px 20px 40px;background:#fff;border-bottom:1px solid var(--line)}.catalog-card .product-photo img{height:100%;width:100%;object-fit:contain}.catalog-card .product-photo figcaption{padding:5px 14px;font-size:.75rem;background:var(--surface);color:var(--muted)}
.catalog-card .product-content{padding:27px 28px 30px}.catalog-card .product-category{font-size:.8125rem;letter-spacing:.02em;margin-bottom:9px}.catalog-card h4{font-size:clamp(1.35rem,2vw,1.75rem);line-height:1.45;font-weight:500;margin:0 0 18px;overflow-wrap:anywhere}.catalog-card .product-summary{font-size:1rem;min-height:3.6em;margin-bottom:20px}.catalog-card .product-description{font-size:1rem}.catalog-card .product-details summary{font-size:.9375rem}.catalog-card .specs td{white-space:pre-line;word-break:normal;overflow-wrap:anywhere}.catalog-card .specs th{width:38%;font-size:.875rem}.catalog-card .specs caption{font-size:.9375rem;line-height:1.6;margin-bottom:14px}.feature-heading{font-size:1rem;font-weight:600;margin:22px 0 10px}.product-features{padding-left:22px;margin:0 0 25px;color:var(--muted);font-size:.9375rem}.product-features li{margin:6px 0}
.comparison-scroll{max-width:100%;overflow-x:auto;margin:24px 0}.comparison-scroll:focus-visible{outline:2px solid var(--blue);outline-offset:3px}.comparison-table{min-width:480px}.catalog-card .comparison-table th{width:auto}.comparison-table thead{background:var(--navy);color:white}.catalog-card .comparison-table thead th{color:white}.comparison-table td{min-width:140px}.back-to-categories{display:inline-block;margin-top:22px;font-size:.875rem;color:var(--blue);text-decoration:underline;text-underline-offset:5px}
@media(max-width:900px){.system-nav{gap:10px}.system-nav a{padding:18px 14px;gap:10px}.system-number{display:none}.system-heading{align-items:start;flex-direction:column;gap:15px}.catalog-grid{gap:20px}.catalog-card .product-content{padding:24px 20px}.catalog-card .specs th,.catalog-card .specs td{padding:9px 8px}}
@media(max-width:650px){.system-nav{grid-template-columns:1fr;gap:10px;margin-bottom:40px}.system-nav a{padding:14px 18px;justify-content:flex-start}.system-nav a>span:last-child{margin-left:auto}.system-number{display:block}.system-nav small{display:inline;margin-left:12px;font-size:.8125rem}.catalog-grid{grid-template-columns:1fr}.system-group{margin-top:45px;scroll-margin-top:135px}.catalog-card .product-photo{height:260px}.catalog-card .product-summary{min-height:0}.catalog-card h4{font-size:1.55rem}}

/* 首页视频：完整展示视频内的宣传文字；原文字及入口保留在视频下方。 */
.hero.hero-video-layout{height:auto;min-height:0;max-height:none;display:block}
.hero-video-layout:after{display:none}
.hero-video-frame{position:relative;background:#07121b}
.hero-video{display:block;width:100%;height:auto;aspect-ratio:16/9;object-fit:contain}
.video-toggle{position:absolute;right:20px;bottom:65px;background:#071f33dc;color:#fff;border:1px solid #ffffff80;border-radius:3px;padding:7px 14px;cursor:pointer}
.video-error{position:absolute;bottom:10px;left:20px;background:#071f33;color:#fff;padding:8px 12px}
.hero-video-layout .hero-copy{max-width:none;padding:32px 0 36px;display:grid;grid-template-columns:1fr auto;column-gap:32px}
.hero-video-layout .hero-copy .eyebrow{margin-bottom:8px}
.hero-video-layout h1{font-size:clamp(1.5rem,2.5vw,2.25rem);margin:0 0 12px}
.hero-video-layout h1 span{display:inline;margin-right:.6em}
.hero-video-layout .hero-description{max-width:none;margin:0;grid-column:1}
.hero-video-layout .hero-actions{grid-column:2;grid-row:1/4;align-self:center}
.hero-video-layout .hero-bottom{position:static}
.language-toggle{flex-shrink:0;background:transparent;border:1px solid #ffffff80;color:#fff;padding:7px 12px;cursor:pointer;white-space:nowrap;font-size:.875rem}
.header-inner{gap:18px}.nav{gap:24px}
html[lang="en"] .brand-name{font-size:1rem;letter-spacing:0;max-width:300px}
html[lang="en"] .brand-sub{letter-spacing:0;font-size:.7rem}
html[lang="en"] .system-nav a{overflow-wrap:anywhere}
@media(max-width:1250px){.brand-copy-with-logo{display:none}}
@media(max-width:800px){.language-toggle{order:2}.menu-toggle{order:3}.brand{margin-right:auto}.hero-video-layout .hero-copy{display:block;padding:25px 0}.hero-video-layout .hero-actions{margin-top:20px}.hero-video-layout h1 span{display:block}.video-toggle{right:12px;bottom:38px;padding:4px 9px;font-size:.75rem}}
@media(max-width:420px){.header-inner{gap:8px}.brand-logo-frame{width:140px}.language-toggle,.menu-toggle{padding:6px 8px}.video-toggle{bottom:28px}}

/* 应用案例：保留完整现场照片，独立模块便于维护。 */
.cases{padding:85px 0 90px;background:var(--white)}
.case-group+.case-group{margin-top:52px}
.case-group-heading{border-top:2px solid var(--navy);padding-top:23px;margin-bottom:24px}
.case-group-heading .eyebrow{color:var(--blue);margin-bottom:5px}
.case-group-heading h3{font:normal clamp(1.6rem,3vw,2rem)/1.5 var(--font-heading);color:var(--navy);margin:0}
.case-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:24px}
.case-card{margin:0;border:1px solid var(--line);min-width:0;background:var(--surface)}
.case-open{display:block;position:relative;background:#edf0f2;overflow:hidden}
.case-open img{width:100%;height:270px;object-fit:contain;transition:transform .25s}
.case-open:hover img{transform:scale(1.025)}
.case-zoom{position:absolute;bottom:12px;right:12px;display:grid;place-items:center;width:32px;height:32px;background:var(--navy);color:white}
.case-card figcaption{padding:13px 17px;color:var(--navy);font-size:.9375rem;background:white;border-top:1px solid var(--line)}
.case-hint{font-size:.875rem;color:var(--muted);text-align:right;margin:24px 0 0}
.case-dialog{position:fixed;border:0;padding:48px 20px 18px;width:min(1100px,calc(100% - 24px));max-width:none;max-height:94dvh;background:#102333;color:white;overflow:auto}
.case-dialog::backdrop{background:#000d}
.case-preview{width:100%;height:calc(85dvh - 150px);object-fit:contain}
.case-close{position:absolute;right:12px;top:6px;border:0;background:transparent;color:white;font-size:2rem;cursor:pointer;width:40px;height:40px;line-height:1}
.case-preview-caption{text-align:center;margin:12px 0;font-size:.9375rem}
.case-preview-controls{display:flex;justify-content:center;gap:20px}
.case-preview-controls button{background:transparent;border:1px solid #ffffff80;color:white;padding:6px 22px;cursor:pointer}
@media(min-width:801px){.nav{gap:18px}}
@media(max-width:1500px){.brand-copy-with-logo{display:none}}
@media(max-width:1000px){.case-grid{gap:18px}.case-open img{height:230px}}
@media(max-width:800px){.cases{padding:60px 0}.case-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:520px){.case-grid{grid-template-columns:1fr;gap:20px}.case-open img{height:290px}.case-group+.case-group{margin-top:36px}.case-dialog{padding-left:12px;padding-right:12px}}