/* 主场科技 / Fieldwork — photographic, cinematic, grounded. */
:root{--ink:#102a37;--muted:#52656e;--line:#cbd2d0;--paper:#f1f1e9;--blue:#104abb;--accent:#d8e8f2;--font:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;--mono:"SFMono-Regular",Consolas,monospace;--serif:"Iowan Old Style","Baskerville","Songti SC",serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:24px}body{margin:0;font-family:var(--font);font-size:15px;line-height:1.75;background:var(--paper);color:var(--ink);-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,input,select,textarea{font:inherit}button{cursor:pointer;color:inherit}button,a{-webkit-tap-highlight-color:transparent}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible{outline:2px solid #297dec;outline-offset:5px}[hidden]{display:none!important}::selection{background:#b4d3ff;color:#0b2134}.skip{position:fixed;left:20px;top:-80px;z-index:99;background:white;color:#142c3a;padding:10px 20px}.skip:focus{top:12px}.wrap{width:min(1344px,calc(100% - 112px));margin:auto}.page{overflow:clip}.pill{display:inline-flex;align-items:center;justify-content:space-between;gap:24px;border:1px solid currentColor;border-radius:0;padding:14px 18px;background:var(--ink);color:white;transition:background .25s,color .25s,transform .3s;font-size:13px}.pill i{font-style:normal;font-size:20px;line-height:1;transition:transform .3s}.pill:hover i{transform:translate(3px,-3px)}.pill:hover{background:var(--blue);color:white}.pill.ghost{background:transparent;color:inherit}.pill.ghost:hover{background:#ffffff20}.hero{min-height:790px;min-height:max(790px,100svh);max-height:1180px;position:relative;display:flex;flex-direction:column;background:#052b46;color:#fff;isolation:isolate}.hero-art,.hero-shade{position:absolute;inset:0;z-index:-2;overflow:hidden}.hero-art img{width:100%;height:100%;object-fit:cover;object-position:65% 60%;transform:scale(1.055) translate3d(var(--px,0px),var(--py,0px),0);will-change:transform;transition:transform 1.1s cubic-bezier(.2,.7,.3,1)}.hero-shade{z-index:-1;background:linear-gradient(90deg,#05233470,transparent 70%),linear-gradient(0deg,#061c3099,transparent 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span{width:40px;height:40px;border:1px solid #adbbb9;border-radius:50%;display:grid;place-items:center;font-size:20px;transition:transform .35s,background .35s,color .35s}.svc:hover,.svc:focus-within{background:#e2e9e5;padding-left:27px}.svc:hover .card-action span,.svc:focus-within .card-action span{background:var(--blue);border-color:var(--blue);color:white;transform:rotate(45deg)}.sec-note{font-size:10px;color:var(--muted);margin:24px 0 0}#incoming{padding:18px;background:#dce8ec;margin-bottom:35px;display:flex;justify-content:space-between;gap:20px}#incoming button{background:none;border:0;border-bottom:1px solid;font-size:12px}
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#method>.wrap{display:grid;grid-template-columns:.85fr 1.15fr;gap:100px;align-items:start}#method .sec-head{display:block;position:sticky;top:60px}#method .sec-head h2{margin:24px 0}#method .sec-head p{max-width:340px}.m-grid{counter-reset:method}.m-card{border-top:1px solid var(--line);padding:28px 0 42px;position:relative}.m-card .num{font:10px var(--mono);color:var(--muted)}.m-card h3{font-size:24px;font-weight:500;letter-spacing:-.6px;margin:20px 0 14px}.m-card p{font-size:13px;line-height:1.9;color:var(--muted);max-width:510px}.artifact{font-size:11px;color:#33576a;border-left:2px solid #7098ac;padding-left:12px;margin-top:24px}#aihub{padding-top:10px}.kb-intro{display:flex;justify-content:space-between;align-items:flex-end;gap:50px;margin-bottom:35px}.kb-intro h2{font-size:34px;font-weight:500;line-height:1.4;margin:20px 0}.kb-intro p{font-size:13px;color:var(--muted);max-width:560px}.kb-link{font-size:12px;border-bottom:1px solid;padding-bottom:8px;margin-bottom:20px;white-space:nowrap}.kb-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}.kb{padding:30px;min-height:200px;display:flex;flex-direction:column;position:relative;border-right:1px solid var(--line);transition:background .3s}.kb:first-child{padding-left:0}.kb:last-child{border:0}.kb small{font:10px var(--mono);color:var(--muted)}.kb span{font-size:19px;line-height:1.7;max-width:270px;margin:20px 0}.kb i{font-style:normal;font-size:23px;align-self:flex-end;margin-top:auto;transition:transform .3s}.kb:hover{background:#e2e9e5}.kb:hover i{transform:translate(3px,-3px)}.foot{background:#0b2b40;color:#f4f4ec;padding:85px 0 24px}.foot-cta{display:flex;justify-content:space-between;align-items:flex-end;gap:40px;padding-bottom:60px;border-bottom:1px solid #66839570}.foot-cta h2{font-size:clamp(34px,4.5vw,66px);line-height:1.35;font-weight:400;letter-spacing:-2px;margin:0 0 20px}.foot-cta h2 em{font-family:var(--serif);font-style:normal}.foot-cta p{color:#bbccda;font-size:13px}.btns{display:flex;gap:12px;flex-wrap:wrap}.foot .pill{background:#ecf1e6;color:#173147;border-color:#ecf1e6}.foot .pill.ghost{background:none;color:white}.foot-mid{display:flex;justify-content:space-between;align-items:center;padding:40px 0;gap:30px}.wordmark{display:flex;align-items:center;gap:10px;font-size:22px;white-space:nowrap}.wordmark svg{width:29px;height:29px}.wordmark small{font:8px var(--mono);margin-left:10px}.foot-links{display:flex;gap:24px;flex-wrap:wrap;font-size:11px;color:#cedde8}.foot-bottom{display:flex;justify-content:space-between;gap:24px;font-size:9px;color:#a1b7c6;border-top:1px solid #66839570;padding-top:20px}dialog{width:min(680px,calc(100% - 32px));max-height:90svh;overflow:auto;border:1px solid var(--line);background:var(--paper);padding:30px;color:var(--ink)}dialog::backdrop{background:#051b31ae;backdrop-filter:blur(6px)}body:has(dialog[open]){overflow:hidden}.dialogtop{display:flex;align-items:flex-start;justify-content:space-between;gap:20px}.eyebrow{font:9px var(--mono);letter-spacing:1px;color:var(--muted)}.dialogtop h2{font-size:26px;font-weight:500;margin:12px 0}.close{width:35px;height:35px;border:1px solid var(--line);background:none;font-size:23px}.dialog-note{font-size:12px;color:var(--muted)}.dialog-note a{text-decoration:underline}.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:18px}label{display:block;font-size:12px;margin:18px 0}select,textarea{width:100%;background:#fff;border:1px solid var(--line);padding:12px;margin-top:8px;color:var(--ink)}textarea{min-height:125px;resize:vertical}.result{margin-top:30px;border-top:1px solid var(--line)}pre{white-space:pre-wrap;overflow-wrap:anywhere;font:12px/1.9 var(--font)}.js-reveal [data-reveal]{opacity:0;transform:translateY(24px);transition:opacity .8s,transform .9s cubic-bezier(.16,1,.3,1)}.js-reveal [data-reveal].revealed{opacity:1;transform:none}.js-reveal [data-reveal=d1]{transition-delay:.08s}.js-reveal [data-reveal=d2]{transition-delay:.16s}.js-reveal [data-reveal=d3]{transition-delay:.24s}.motion-paused *{animation:none!important;transition:none!important;scroll-behavior:auto!important}.motion-paused [data-reveal]{opacity:1!important;transform:none!important}
@media(min-width:1600px){.hero-body{padding-top:100px;padding-bottom:120px}}@media(max-width:1100px){.wrap{width:calc(100% - 64px)}.navlinks{gap:18px}.navcta{display:none}.svc{grid-template-columns:30px 1fr 1.25fr;gap:20px}.svc .card-action{grid-column:2;grid-row:2;justify-content:flex-start}.svc .tags{grid-row:2;grid-column:3;margin-top:0}.svc h3{font-size:22px}.sec-head{gap:40px}#method>.wrap{gap:50px}.foot-mid{align-items:flex-start}.wordmark small{display:none}.hero{min-height:800px}}@media(max-width:700px){.wrap{width:calc(100% - 40px)}.hero{min-height:790px;min-height:100svh;max-height:none}.nav{height:80px}.brand{font-size:19px}.brand svg{width:29px}.menu{display:block}.navlinks{display:none;position:absolute;top:80px;left:20px;right:20px;padding:20px;background:#0b304b;box-shadow:0 20px 50px #0004}.navlinks.open{display:flex;flex-direction:column;align-items:stretch;gap:6px}.navlinks a{padding:11px;font-size:15px}.hero-art img{object-position:69% center}.hero-shade{background:linear-gradient(90deg,#08263a88,#05243600),linear-gradient(0deg,#06283b,transparent 65%)}.hero-body{padding:65px 0 115px;justify-content:flex-start}.hero-index{font-size:9px}.index-no{display:none}.hero h1{font-size:clamp(48px,11.8vw,75px);letter-spacing:-2.5px;margin:30px 0 25px}.hero-copy{font-size:13px;max-width:280px}.hero-actions{gap:22px;flex-wrap:wrap}.hero-actions .pill{min-width:195px;font-size:12px;padding:12px 14px}.hero-discover{font-size:11px;gap:18px}.hero-foot{flex-wrap:wrap;gap:20px;padding-bottom:25px}.hero-signature{font-size:35px}.location-note{font-size:9px}.location-note small{font-size:6px}.motion-toggle{margin-left:auto;font-size:8px;padding:5px 8px}.section{padding:70px 0}.sec-head{display:block;margin-bottom:35px}.sec-head h2{font-size:34px;letter-spacing:-1px}.sec-head>p{margin-top:24px;font-size:13px}.sec-badge{font-size:9px;margin-bottom:23px}.svc{grid-template-columns:25px 1fr;gap:15px;padding:24px 0}.svc h3{font-size:22px}.svc p{grid-column:2;font-size:12px}.svc .tags{grid-column:2;grid-row:auto;font-size:9px}.svc .card-action{grid-column:2;grid-row:auto;justify-content:space-between}.svc:hover,.svc:focus-within{padding-left:10px}.sec-note{font-size:9px}.scene-tab{padding:19px 10px}.scene-tab span{font-size:7px;letter-spacing:.6px}.scene-tab strong{font-size:12px}.scene-tab[aria-selected=true]:after{display:none}.scene-body{padding-top:28px}.scene-body h3{font-size:23px}.scene-body>p{font-size:12px}.flow-row{flex-direction:column;align-items:stretch;gap:14px;margin-top:30px}.flow-block{padding-bottom:15px}.flow-block span{font-size:13px}.flow-arrow{display:none}.scene-evidence{flex-direction:column;align-items:flex-start;font-size:10px}#method>.wrap{display:block}#method .sec-head{position:static}.m-card{padding:25px 0 32px}.m-card h3{font-size:21px}.m-card p{font-size:12px}.artifact{font-size:10px}.kb-intro{display:block}.kb-intro h2{font-size:29px}.kb-link{display:inline-block;margin-top:12px;font-size:11px}.kb-grid{display:block}.kb{padding:24px 0;min-height:150px;border-right:0;border-bottom:1px solid var(--line)}.kb span{font-size:18px;max-width:90%;margin:12px 0}.kb i{position:absolute;right:5px;bottom:20px}.foot{padding:55px 0 24px}.foot-cta{display:block;padding-bottom:40px}.foot-cta h2{font-size:38px;letter-spacing:-1px}.foot-cta p{font-size:12px;margin-bottom:25px}.foot-mid{display:block;padding:30px 0}.foot-links{margin-top:22px;gap:15px}.foot-bottom{display:block;font-size:8px}.foot-bottom span{display:block;margin-bottom:7px}.formgrid{grid-template-columns:1fr;gap:0}dialog{padding:22px}.dialogtop h2{font-size:23px}#incoming{flex-direction:column;font-size:12px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}.js-reveal [data-reveal]{opacity:1;transform:none}.hero-art img{transform:none;will-change:auto}}
@media(prefers-reduced-motion:no-preference){.hero-art img{animation:field-breathe 18s ease-in-out infinite alternate}@keyframes field-breathe{from{scale:1}to{scale:1.035}}}

/* Public ICP filing, supplied by the site owner. */
.icp-footer{text-align:center;padding:18px 20px 20px;font-size:12px;line-height:1.8;color:inherit;opacity:.85}.icp-footer a{color:inherit;text-decoration:none}.icp-footer a:hover{text-decoration:underline;text-underline-offset:4px}.icp-footer a:focus-visible{outline:2px solid currentColor;outline-offset:5px}

/* Fixed vector geometry: never use system emoji fonts for arrows. */
.ui-arrow{display:inline-block;width:1.05em;height:1.05em;flex-shrink:0;vertical-align:-.14em;overflow:visible;fill:none;stroke:currentColor;stroke-width:1.5;stroke-linecap:round;stroke-linejoin:round}.ui-arrow path{fill:none;stroke:currentColor;stroke-width:1.5}.footer-contact{text-align:center;padding:20px 20px 0;font-size:12px;overflow-wrap:anywhere}.footer-contact a{color:inherit;text-decoration:none}.footer-contact a:hover{text-decoration:underline;text-underline-offset:4px}.foot-links .ui-arrow,.footer-links .ui-arrow,.navlinks .ui-arrow,.nav-links .ui-arrow{width:13px;height:13px}.hero-discover .ui-arrow{width:19px;height:19px}.explore-stamp strong .ui-arrow{width:38px;height:38px}.discovery-symbol .ui-arrow{width:42px;height:42px}.hero-signature .ui-arrow{width:14px;height:14px}

.scene-tab[aria-selected=true]:after{width:20px;height:20px;background:currentColor;mask:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath d='M6 18 18 6M6 6h12v12' fill='none' stroke='black' stroke-width='1.5'/%3E%3C/svg%3E") center/contain no-repeat}