:root{--paper:#f5f3ec;--ink:#172a26;--copper:#ad462d;--mint:#e3eee5;--muted:#52615b;--line:#697a70;--header:90px;color-scheme:light;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--ink);background:var(--paper);scroll-behavior:smooth;scroll-padding-top:calc(var(--header) + 24px)}
*{box-sizing:border-box}body{margin:0}body.menu-open{overflow:hidden}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button,a,input,select,textarea{-webkit-tap-highlight-color:transparent}button{cursor:pointer}img{display:block;max-width:100%;height:auto}figure,p,h1,h2,h3{margin:0}p{font-size:17px;line-height:1.9}p+p{margin-top:18px}h1,h2,h3{font-family:"Noto Serif CJK SC","Source Han Serif SC","Songti SC","SimSun",Georgia,serif;font-weight:600}h2{font-size:clamp(38px,4.3vw,62px);line-height:1.22;letter-spacing:-.035em}h3{font-size:32px;line-height:1.3}a:focus-visible,button:focus-visible,input:focus-visible,textarea:focus-visible,select:focus-visible{outline:3px solid var(--copper);outline-offset:5px}a:hover .arrow{transform:translateX(5px)}[tabindex="-1"]:focus{outline:none}.shell{width:calc(100% - 128px);max-width:1312px;margin-inline:auto}.section-space{padding-block:112px}.eyebrow{font-family:Consolas,monospace;font-size:12px;letter-spacing:.12em;line-height:1.6;color:var(--copper);font-weight:500}.eyebrow span{margin-inline:14px}.text-link{display:inline-flex;align-items:center;gap:24px;min-height:48px;font-size:15px;font-weight:600;line-height:1.6;border-bottom:1px solid var(--copper);padding-block:10px}.text-link span{font-family:Arial,sans-serif;font-size:24px;font-weight:400;transition:transform .2s}.text-link:hover span{transform:translate(4px,-3px)}.skip-link{position:fixed;top:8px;left:16px;z-index:100;padding:14px 20px;background:var(--ink);color:var(--paper);transform:translateY(-150%);font-size:16px}.skip-link:focus{transform:translateY(0)}
.site-header{height:var(--header);position:sticky;top:0;z-index:50;background:var(--paper);display:flex;align-items:center;justify-content:space-between;padding-inline:clamp(24px,4.45vw,64px);border-bottom:1px solid #ccd2c8;gap:28px}.brand,.footer-brand{display:flex;align-items:center;gap:16px;flex-shrink:0;font-size:22px;font-weight:600;line-height:1.2;min-height:52px}.site-mark{width:59px;height:42px;color:var(--copper);flex-shrink:0}.brand small{display:block;font-size:10px;letter-spacing:.03em;font-weight:400;margin-top:6px;color:var(--muted)}.site-header nav{display:flex;align-items:center;gap:32px}.site-header nav a{display:flex;align-items:center;min-height:48px;font-size:14px;white-space:nowrap}.site-header nav a:hover{color:var(--copper)}.nav-contact{gap:12px}.nav-contact span{font-size:22px}.menu-toggle{display:none}
.hero{position:relative;isolation:isolate;height:750px;overflow:hidden;background:var(--paper)}.hero-art{position:absolute;inset:0 0 0 auto;width:76%;height:100%;object-fit:cover;object-position:center}.hero-inner{position:relative;height:100%;display:flex;align-items:center}.hero-copy{width:48%;padding-block:30px;background:var(--paper)}.hero h1{font-size:clamp(66px,6.55vw,100px);line-height:1.11;letter-spacing:-.035em;margin:30px 0 27px;position:relative}.hero h1 span{display:block;white-space:nowrap}.hero-intro{font-size:18px;line-height:1.75;max-width:370px}.hero .text-link{margin-top:34px}.hero-bottom{position:absolute;left:0;right:0;bottom:18px;display:flex;justify-content:space-between;align-items:center;gap:24px;font-size:12px;line-height:1.6;background:var(--paper);padding:12px 0}.hero-bottom a{display:flex;align-items:center;gap:25px;min-height:44px;font-size:12px}.hero-bottom span:last-child{font-size:20px}.section-heading{display:grid;grid-template-columns:1fr 1fr;gap:10%;align-items:end;margin-bottom:66px}.section-heading h2{margin-top:22px}.intro-text{max-width:460px;justify-self:end;color:var(--muted)}
.product-row{display:grid;grid-template-columns:31% 1fr;gap:8%;align-items:center;margin-top:60px}.product-row.reverse{grid-template-columns:1fr 31%}.product-row.reverse .product-copy{grid-column:2;grid-row:1}.product-row.reverse figure{grid-column:1;grid-row:1}.product-number{font-family:Georgia,serif;font-size:24px;color:var(--copper);line-height:1.3;margin-bottom:20px}.product-number span{font-family:Consolas,monospace;font-size:12px;letter-spacing:.12em;margin-left:8px;color:var(--muted)}.product-copy h3{font-size:38px;margin-bottom:16px}.product-copy p:not(.product-number){color:var(--muted);font-size:16px}.product-copy p+p{margin-top:10px}.product-copy .text-link{margin-top:18px}.product-row img{width:100%;aspect-ratio:1.65;object-fit:cover}.product-row figcaption{display:flex;justify-content:space-between;gap:20px;font-family:Consolas,monospace;font-size:10px;letter-spacing:.1em;color:var(--muted);line-height:1.8;padding-top:16px}.product-row.reverse img{aspect-ratio:1.8}
.connections{background:var(--mint)}.direction-controls{display:flex;gap:0;border-bottom:1px solid var(--line);margin-bottom:40px;max-width:760px}.direction-controls button{border:0;background:transparent;color:var(--ink);display:flex;align-items:center;justify-content:space-between;padding:20px 28px;gap:30px;font-size:17px;flex:1;min-height:64px;transition:background .2s,color .2s}.direction-controls button span{font-size:24px}.direction-controls button[aria-pressed="true"]{color:var(--paper);background:var(--copper)}.direction-controls button:hover:not([aria-pressed="true"]){background:#ccdccc}.route-composition{display:grid;grid-template-columns:34% 1fr;gap:3%;align-items:center}.route-copy{min-height:367px}.route-copy h3{font-size:36px;margin:12px 0 16px}.route-copy p:not(.eyebrow){font-size:16px;color:var(--muted)}.route-copy ul{list-style:none;margin:20px 0;padding:0;font-size:15px;line-height:2}.route-copy li{position:relative;padding-left:18px}.route-copy li:before{content:"—";position:absolute;left:0;color:var(--copper)}.route-copy .text-link{font-size:14px;margin-top:0}.route-map{position:relative;min-width:0;padding-bottom:18px}.route-map svg{width:100%;height:auto;display:block}.circuit-quiet{stroke:#899f92}.route-path{stroke:var(--copper);stroke-width:4;opacity:0;transition:opacity .3s;stroke-linejoin:round}.route-path.active{opacity:1}.route-path circle{fill:var(--copper);stroke:var(--mint);stroke-width:2}.map-word{position:absolute;bottom:8px;right:0;font-family:Consolas,monospace;font-size:10px;letter-spacing:.14em;line-height:1.8}
.detail-pair{display:grid;grid-template-columns:1.25fr 1fr;gap:12%;align-items:start}.detail-small{padding-top:100px}.detail-pair img{aspect-ratio:1.45;width:100%;object-fit:cover}.detail-small img{aspect-ratio:1.1}.detail-pair figcaption{display:flex;gap:25px;padding-top:25px;align-items:start}.detail-pair h3{font-size:27px;line-height:1.4;min-width:170px}.detail-pair p{font-size:15px;line-height:1.85;color:var(--muted)}.detail-small figcaption{display:block}.detail-small figcaption p{max-width:290px;margin-top:16px}.observation{display:grid;grid-template-columns:1fr 1fr;gap:10%;align-items:center;margin-top:100px}.observation img{width:100%;aspect-ratio:1.7;object-fit:cover}.observation h3{font-size:38px;margin:16px 0 20px}.observation p:not(.eyebrow){font-size:16px;color:var(--muted);max-width:450px}.observation .text-link{margin-top:20px}
.history{background:var(--ink);color:var(--paper)}.history .eyebrow{color:#dfab8d}.history .intro-text{color:#c8d5ca}.timeline{display:grid;grid-template-columns:repeat(4,1fr);list-style:none;margin:0;padding:0;gap:34px;position:relative}.timeline:before{content:"";position:absolute;top:69px;left:0;right:0;height:1px;background:#a5b5a6}.timeline li{position:relative;padding-top:0}.timeline li:after{content:"";position:absolute;top:65px;left:0;width:9px;height:9px;border-radius:50%;background:var(--paper)}.timeline .year{font-family:Georgia,serif;font-size:42px;line-height:1.2;display:block;margin-bottom:58px}.timeline .year small{font-family:"Microsoft YaHei",sans-serif;font-size:12px;margin-left:9px}.timeline h3{font-family:"Microsoft YaHei",sans-serif;font-size:16px;font-weight:500}.timeline p{font-size:13px;line-height:1.8;color:#c8d5ca;margin-top:15px;max-width:245px}.landscape{position:relative;background:var(--mint);height:410px;overflow:hidden}.landscape img{width:100%;height:100%;object-fit:cover;object-position:center 65%}.landscape-copy{position:absolute;left:64px;top:48px;padding:23px 30px;background:var(--paper)}.landscape-copy h2{font-size:36px;margin-top:12px;line-height:1.2}
.contact-body{display:grid;grid-template-columns:38% 1fr;gap:12%}.contact-information h3{font-family:inherit;font-size:16px;font-weight:600}.contact-information address{font-style:normal;font-size:17px;line-height:1.9;margin-top:16px;color:var(--muted)}.business-contact{margin-top:46px}.contact-phone{font-size:30px;display:block;line-height:1.5;min-height:48px;margin-top:13px}.contact-email{display:block;font-family:Arial,sans-serif;font-size:18px;min-height:44px;line-height:1.6;padding-block:8px;overflow-wrap:anywhere}.official-link{font-size:13px;margin-top:12px}.contact-note{font-size:12px;color:var(--muted);margin-top:55px}fieldset{margin:0;padding:0;border:0;min-width:0}legend{font-size:18px;font-weight:600;margin-bottom:22px}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin-bottom:24px}label{font-size:13px;line-height:1.7;display:block}input,select,textarea{display:block;width:100%;color:var(--ink);border:1px solid var(--line);border-radius:0;background:transparent;margin-top:10px;padding:14px 13px;min-height:50px;font-size:15px;line-height:1.6;appearance:auto}textarea{resize:vertical;min-height:142px}input::placeholder,textarea::placeholder{color:#58685f;opacity:1}select{font-size:13px;padding-right:9px}fieldset:disabled{opacity:.72}.form-footer{display:flex;align-items:center;gap:25px;flex-wrap:wrap;margin-top:26px}.form-footer button{min-height:52px;padding:15px 26px;display:flex;align-items:center;gap:28px;border:0;background:var(--copper);color:var(--paper);font-size:15px}.form-footer p{font-size:12px;color:var(--muted)}#form-status{font-size:14px;line-height:1.8;margin-top:22px;color:var(--copper);font-weight:600;min-height:26px}
.site-footer{border-top:1px solid #ccd2c8;padding:35px 0}.footer-inner{display:flex;justify-content:space-between;gap:30px;align-items:center}.footer-brand{font-size:17px}.footer-brand small{display:block;margin-top:8px;font-size:11px;font-weight:400;line-height:1.6;color:var(--muted)}.footer-notes{text-align:right}.footer-notes p{font-size:10px;color:var(--muted);line-height:1.8}.footer-notes p+p{margin-top:5px}
@media(max-width:1100px){.site-header nav{gap:20px}.brand{font-size:19px;gap:10px}.site-mark{width:48px}.hero{height:660px}.hero-copy{width:48%}.hero h1{font-size:clamp(59px,7vw,78px)}.section-space{padding-block:90px}.shell{width:calc(100% - 80px)}.product-row{grid-template-columns:36% 1fr;gap:7%}.product-row.reverse{grid-template-columns:1fr 36%}.product-copy h3{font-size:31px}.product-row img{aspect-ratio:1.4}.section-heading{gap:8%}.detail-pair{gap:9%}.detail-pair figcaption{display:block}.detail-pair figcaption p{margin-top:16px}.observation{gap:8%}.contact-body{gap:9%}.contact-phone{font-size:26px}}
@media(max-width:950px){:root{--header:80px}.site-header{padding-inline:32px}.menu-toggle{display:flex;align-items:center;gap:15px;border:0;padding:13px 0 13px 16px;background:transparent;color:var(--ink);font-size:13px;min-width:82px;min-height:48px;z-index:52}.menu-lines{display:block;width:25px;height:14px;position:relative}.menu-lines:before,.menu-lines:after{content:"";position:absolute;left:0;width:25px;height:1px;background:var(--copper);transition:transform .2s,top .2s}.menu-lines:before{top:2px}.menu-lines:after{top:12px}.menu-toggle[aria-expanded="true"] .menu-lines:before{top:7px;transform:rotate(45deg)}.menu-toggle[aria-expanded="true"] .menu-lines:after{top:7px;transform:rotate(-45deg)}.site-header nav{display:none;position:fixed;inset:var(--header) 0 0;background:var(--paper);padding:45px 40px;align-items:stretch;flex-direction:column;justify-content:flex-start;gap:15px;overflow:auto}.site-header nav.open{display:flex}.site-header nav a{font-family:"SimSun",Georgia,serif;font-size:30px;min-height:70px;border-bottom:1px solid #ccd2c8;justify-content:space-between}.hero-art{width:74%;object-position:53% center}.hero-copy{width:49%}.hero h1{font-size:61px}.hero-intro{font-size:16px}.hero-bottom{font-size:10px}.hero-bottom a{font-size:11px}.section-heading h2{font-size:44px}.intro-text p,.intro-text{font-size:15px}.product-copy p:not(.product-number){font-size:14px}.product-row figcaption{flex-direction:column;gap:2px}.route-composition{grid-template-columns:42% 1fr;gap:2%}.route-copy h3{font-size:32px}.route-copy p:not(.eyebrow){font-size:14px}.route-copy ul{font-size:13px}.timeline{gap:24px}.timeline .year{font-size:34px}.timeline h3{font-size:13px}.timeline p{font-size:12px}.contact-body{grid-template-columns:34% 1fr;gap:8%}.contact-information address{font-size:15px}.contact-phone{font-size:23px}.contact-email{font-size:16px}.form-row{gap:15px}.form-footer{gap:14px}.form-footer p{font-size:10px}}
@media(max-width:640px){:root{--header:76px;scroll-padding-top:96px}.shell{width:calc(100% - 48px)}.site-header{padding-inline:24px;gap:16px}.brand{font-size:17px;gap:8px;min-height:48px}.brand .site-mark{width:38px;height:32px}.brand small{display:none}.brand-location{display:inline}.menu-toggle{min-width:54px;gap:0;padding:12px 0 12px 20px}.menu-label{display:none}.site-header nav{padding:28px 24px}.site-header nav a{font-size:27px;min-height:65px}.hero{height:auto;padding-top:44px;display:flex;flex-direction:column}.hero-inner{height:auto;order:0}.hero-copy{width:100%;padding:0;background:none}.hero h1{font-size:clamp(45px,13vw,62px);line-height:1.12;margin:23px 0 22px;letter-spacing:-.04em}.hero .eyebrow{font-size:10px}.hero-intro{font-size:16px;line-height:1.75}.hero .text-link{margin-top:18px}.hero-art{position:relative;inset:auto;width:100%;height:310px;order:1;object-fit:cover;object-position:right center;margin-top:18px}.hero-bottom{position:relative;inset:auto;order:2;padding-block:12px;flex-direction:column;align-items:flex-start;gap:2px;font-size:10px}.hero-bottom a{font-size:11px;gap:20px}.hero-bottom span:last-child{font-size:17px}.section-space{padding-block:70px}.section-heading{grid-template-columns:1fr;gap:25px;margin-bottom:40px;align-items:start}.section-heading h2{font-size:38px;line-height:1.23;margin-top:15px}.intro-text{justify-self:start;max-width:none;font-size:15px;line-height:1.85}.intro-text p{font-size:15px;line-height:1.85}.eyebrow{font-size:10px}.product-row,.product-row.reverse{display:flex;flex-direction:column;gap:27px;margin-top:45px;align-items:stretch}.product-row.reverse .product-copy,.product-row.reverse figure{grid-column:auto;grid-row:auto}.product-copy{max-width:100%}.product-copy h3{font-size:33px;margin-bottom:12px}.product-number{font-size:24px;margin-bottom:14px}.product-copy p:not(.product-number){font-size:15px}.product-copy .text-link{margin-top:10px}.product-row img,.product-row.reverse img{aspect-ratio:1.4}.product-row figcaption{font-size:9px;padding-top:10px;flex-direction:row;gap:15px;letter-spacing:.025em}.direction-controls{margin-bottom:30px}.direction-controls button{font-size:14px;padding:14px 8px;gap:3px;min-height:57px;justify-content:center}.direction-controls button span{font-size:18px}.route-composition{display:flex;flex-direction:column;align-items:stretch}.route-copy{min-height:0}.route-copy h3{font-size:32px;margin-top:14px}.route-copy p:not(.eyebrow){font-size:15px}.route-copy ul{font-size:14px;margin-block:19px}.route-copy .text-link{font-size:14px}.route-map{margin-top:18px;padding-bottom:23px}.map-word{font-size:8px;bottom:0;right:0}.route-path{stroke-width:5}.detail-pair{display:flex;flex-direction:column;gap:40px}.detail-small{padding-top:0;width:86%;align-self:flex-end}.detail-pair figcaption{padding-top:20px}.detail-pair h3{font-size:26px}.detail-pair figcaption p{font-size:14px;max-width:none;margin-top:12px}.detail-small img{aspect-ratio:1.3}.observation{display:flex;flex-direction:column;gap:27px;margin-top:48px;align-items:stretch}.observation img{aspect-ratio:1.4}.observation h3{font-size:31px;margin:13px 0 17px}.observation p:not(.eyebrow){font-size:15px}.observation .text-link{margin-top:14px}.timeline{display:flex;flex-direction:column;gap:40px;padding-left:30px}.timeline:before{top:15px;bottom:40px;left:1px;right:auto;width:1px;height:auto}.timeline li:after{top:15px;left:-33px;width:9px;height:9px}.timeline .year{font-size:38px;margin-bottom:12px}.timeline .year small{font-size:12px}.timeline h3{font-size:16px;line-height:1.5}.timeline p{font-size:13px;max-width:280px;margin-top:9px}.landscape{height:340px}.landscape-copy{top:24px;left:24px;padding:17px 20px}.landscape-copy h2{font-size:27px;margin-top:10px}.landscape .eyebrow{font-size:9px}.landscape img{object-position:63% center}.contact-body{display:flex;flex-direction:column;gap:45px}.contact-information address{font-size:15px}.contact-phone{font-size:28px}.contact-email{font-size:17px}.business-contact{margin-top:28px}.contact-note{margin-top:25px;font-size:11px}.form-row{grid-template-columns:1fr;gap:21px;margin-bottom:21px}legend{font-size:18px}.form-footer{gap:12px}.form-footer button{font-size:15px;min-height:52px}.form-footer p{font-size:11px}.footer-inner{flex-direction:column;align-items:flex-start;gap:24px}.footer-brand{font-size:16px;gap:12px}.footer-brand .site-mark{width:48px}.footer-notes{text-align:left}.footer-notes p{font-size:10px}.site-footer{padding-block:30px}}
@media(prefers-reduced-motion:reduce){:root{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}