/* 主场科技官网 · 设计系统（基于评审通过的首页样稿） */
:root{--bg:#0e1214;--panel:#171b1e;--line:#2e383e;--muted:#9eaeb8;--ink:#e9eff3;--accent:#9cc2da;--white:#e9eef2;--dark:#141b20;--font:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--mono:"SFMono-Regular",Consolas,monospace;--max:1240px;--radius:5px}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0;color:var(--ink);background:var(--bg);font-family:var(--font);font-size:15px;line-height:1.75}
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}
button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible,textarea:focus-visible,summary:focus-visible{outline:2px solid var(--accent);outline-offset:5px}
button{color:inherit}::selection{background:var(--accent);color:var(--bg)}
.wrap{width:min(var(--max),calc(100% - 112px));margin:auto}
.mono{font-family:var(--mono);font-size:11px;letter-spacing:1.5px}
.eyebrow{display:flex;align-items:center;gap:12px;color:var(--accent);font-size:11px;letter-spacing:2px}
.eyebrow:before{content:"";width:7px;height:7px;background:var(--accent)}
.topnote{background:#1a2126;border-bottom:1px solid #2e3940;font-size:11px;letter-spacing:.8px;color:#b8c3ca}
.topnote .wrap{display:flex;justify-content:space-between;padding:7px 0}
.topnote a{border-bottom:1px solid #526470}
.nav{height:88px;display:flex;align-items:center;justify-content:space-between;gap:32px}
.head{border-bottom:1px solid var(--line);background:rgba(16,18,16,.94);position:sticky;top:0;z-index:15;backdrop-filter:blur(16px)}
.brand{display:flex;align-items:center;gap:13px;font-weight:600;font-size:21px;letter-spacing:2px;white-space:nowrap}
.brand svg{width:36px;height:36px;flex:none}
.brand small{display:block;font-size:8px;letter-spacing:2.2px;line-height:1.1;color:var(--muted);font-weight:400}
.navlinks{display:flex;align-items:center;gap:30px;font-size:13px}
.navlinks a{color:#b9c4cb;transition:color .2s}
.navlinks a:hover,.navlinks a[aria-current]{color:var(--accent)}
.navcta{border:1px solid #4a5a64;background:none;padding:10px 18px;font-size:12px}
.navcta:hover{background:var(--accent);color:var(--bg)}
.menu{display:none;border:1px solid var(--line);background:none;padding:8px 12px}
/* Hero */
.hero{position:relative;overflow:hidden;padding:75px 0 0}
.hero:before{content:"";position:absolute;width:600px;height:600px;background:radial-gradient(ellipse,rgba(139,179,70,.08),transparent 65%);right:-150px;top:0;pointer-events:none}
.hero-grid{display:grid;grid-template-columns:1.06fr 1fr;align-items:center;gap:12px;min-height:540px}
.hero h1{font-size:clamp(40px,4.7vw,68px);line-height:1.22;letter-spacing:-2px;font-weight:500;margin:29px 0 26px}
.hero h1 em{font-style:normal;color:var(--accent)}
.hero-copy{max-width:510px;color:var(--muted);font-size:16px;line-height:1.95}
.actions{display:flex;align-items:center;gap:24px;margin:35px 0 24px;flex-wrap:wrap}
.btn{border:1px solid transparent;border-radius:2px;display:inline-flex;align-items:center;justify-content:center;gap:28px;background:var(--accent);color:var(--dark);padding:15px 23px;font-size:14px;font-weight:600;transition:background .2s,transform .2s}
.btn:hover{background:#c1d8e7;transform:translateY(-2px)}
.btn span{font-size:19px;font-weight:400}
.btn.ghost{background:none;border-color:#4a5a64;color:var(--ink)}
.btn.ghost:hover{background:#1c252a;color:var(--accent)}
.textlink{font-size:13px;border-bottom:1px solid #5a6d79;padding-bottom:4px;background:none;border-top:0;border-left:0;border-right:0;color:inherit}
.textlink:hover{color:var(--accent);border-color:var(--accent)}
.subnote{font-size:11px;color:#768c9a}
.visual{height:500px;position:relative;border:1px solid #283238;background:radial-gradient(ellipse at 50% 48%,#19252c 0%,#0f1418 57%,#101315 75%);border-radius:var(--radius);overflow:hidden}
.visual:before{content:"";position:absolute;inset:0;background-image:linear-gradient(#809eb10a 1px,transparent 1px),linear-gradient(90deg,#809eb10a 1px,transparent 1px);background-size:32px 32px}
.visual-label{position:absolute;left:24px;right:24px;top:19px;display:flex;justify-content:space-between;font-size:9px;color:#8dacbf;letter-spacing:1.4px;z-index:1}
.live-dot{display:inline-block;background:var(--accent);height:5px;width:5px;box-shadow:0 0 12px var(--accent);margin-right:8px;border-radius:50%}
.field{width:100%;height:100%;display:block}
.field g.rings{transform-origin:300px 250px;animation:breathe 9s ease-in-out infinite}
.field .trace{stroke-dasharray:80 700;animation:trace 8s linear infinite}
.field .point{animation:pulse 3s ease-in-out infinite}
.visual-caption{position:absolute;left:25px;right:25px;bottom:26px;border-top:1px solid #334753;padding-top:16px;display:flex;justify-content:space-between;align-items:center;gap:12px}
.visual-caption strong{font-size:16px;font-weight:500}
.visual-caption small{font-family:var(--mono);font-size:9px;color:#7d929f}
.signal-label{position:absolute;font-size:10px;color:#b4cad8;border:1px solid #344854;background:#111a20d9;padding:6px 12px}
.signal-label.a{top:90px;left:25px}.signal-label.b{top:310px;right:23px}
.mini-coord{position:absolute;left:24px;top:300px;color:#556976;font-family:var(--mono);font-size:9px;line-height:1.9}
.entry-strip{display:grid;grid-template-columns:170px repeat(4,1fr);align-items:center;margin-top:55px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.entry-strip>span{font-size:11px;color:var(--muted)}
.entry-strip a{padding:24px 15px;font-size:12px;display:flex;gap:15px;justify-content:space-between;border-left:1px solid var(--line)}
.entry-strip a:hover{background:#1c252a;color:var(--accent)}
.entry-strip b{font-weight:400}
/* Sections */
.section{padding:96px 0}
.section-head{display:flex;align-items:end;justify-content:space-between;margin-bottom:38px;gap:32px}
.section-head h2{font-size:36px;letter-spacing:-1px;line-height:1.35;margin:13px 0 0;font-weight:500}
.section-head p{font-size:13px;color:var(--muted);max-width:380px;margin:0}
.services{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line)}
.service{padding:28px 25px 30px;border-right:1px solid var(--line);display:flex;flex-direction:column;align-items:start;min-height:325px;transition:background .25s}
.service:last-child{border-right:0}
.service:hover{background:#1b2227}
.service-top{display:flex;justify-content:space-between;width:100%;align-items:center;color:#7b909d;margin-bottom:31px}
.service svg{width:34px;height:34px;stroke:var(--accent);fill:none;stroke-width:1.2}
.service h3{font-size:20px;margin:0 0 13px;font-weight:500}
.service p{font-size:13px;color:var(--muted);margin:0 0 16px}
.service .tags{font-size:10px;color:#8297a5;line-height:1.8;margin-top:auto;margin-bottom:17px}
.card-action{border:0;padding:0;background:none;font-size:12px;color:var(--accent);display:flex;justify-content:space-between;width:100%;text-align:left}
.card-action:hover{text-decoration:underline}
/* Light section (scenarios) */
.light{background:var(--white);color:var(--dark)}
.light .eyebrow{color:#475b68}.light .eyebrow:before{background:#4e697b}
.light .section-head p{color:#596c78}
.workbench{display:grid;grid-template-columns:310px 1fr;border-top:1px solid #c1cbd1}
.scene-nav{border-right:1px solid #c1cbd1;padding-top:8px}
.scene-tab{background:none;border:0;border-bottom:1px solid #cdd6dc;display:flex;align-items:center;justify-content:space-between;text-align:left;width:100%;padding:21px 24px 21px 0;color:#536570;gap:10px}
.scene-tab span{font-size:10px;display:block;font-family:var(--mono);letter-spacing:1.4px;margin-bottom:5px;color:#677e8c}
.scene-tab strong{font-size:16px;font-weight:500}
.scene-tab[aria-selected=true]{color:#1b2c37}
.scene-tab[aria-selected=true]:after{content:"";font-size:21px;background:#b4d1e3;padding:5px 12px}
.scene-content{padding:36px 0 10px 44px}
.sample-label{font-size:10px;color:#516979;border:1px solid #a9becb;padding:4px 9px}
.scene-content h3{font-size:27px;font-weight:500;letter-spacing:-.6px;line-height:1.45;margin:22px 0 15px}
.scene-content>p{color:#566874;font-size:14px;max-width:630px;margin-bottom:26px}
.flow-row{display:grid;grid-template-columns:1fr 24px 1fr 24px 1fr;align-items:center}
.flow-block{border:1px solid #bdc9d0;background:#dfe6eb;padding:16px;font-size:12px;min-height:104px}
.flow-block small{font-family:var(--mono);font-size:9px;color:#687e8c;display:block;margin-bottom:12px;letter-spacing:1px}
.flow-arrow{text-align:center;color:#788e9c}
.scene-evidence{margin-top:24px;padding:15px 0;border-top:1px solid #c3cfd6;display:flex;justify-content:space-between;font-size:12px;gap:15px;color:#475965;flex-wrap:wrap}
.scene-evidence button{background:none;border:0;border-bottom:1px solid #50616c;padding:0;color:#172f3e}
.light :focus-visible{outline-color:#204054}
/* Method */
.method-grid{display:grid;grid-template-columns:.85fr 1.4fr;gap:90px}
.method-intro h2{font-size:36px;line-height:1.5;font-weight:500;letter-spacing:-1px;margin:21px 0}
.method-intro p{color:var(--muted);font-size:14px;max-width:360px}
.method-step{border-top:1px solid var(--line);padding:0}
.method-step:last-child{border-bottom:1px solid var(--line)}
.method-step summary{list-style:none;display:flex;gap:22px;align-items:center;padding:24px 0;cursor:pointer}
.method-step summary::-webkit-details-marker{display:none}
.method-step summary:after{content:"+";margin-left:auto;font-size:22px;color:#728896}
.method-step[open] summary:after{content:"−";color:var(--accent)}
.method-step summary small{font-family:var(--mono);color:#688292;font-size:11px}
.method-step summary b{font-weight:500;font-size:18px}
.method-step>div{padding:0 28px 25px 42px;font-size:13px;color:var(--muted)}
.method-step .artifact{margin-top:13px;color:var(--accent);font-size:11px}
/* Knowledge */
.knowledge{border-top:1px solid var(--line);padding:60px 0}
.knowledge-grid{display:grid;grid-template-columns:.8fr 1.5fr;gap:90px;align-items:center}
.knowledge h2{font-size:28px;font-weight:500;line-height:1.55;margin:18px 0}
.knowledge p{font-size:13px;color:var(--muted)}
.articles a{display:grid;grid-template-columns:70px 1fr 30px;gap:20px;padding:20px 0;border-bottom:1px solid var(--line);align-items:center;font-size:14px}
.articles small{font-size:10px;color:#7891a1}
.articles a:hover{color:var(--accent)}
/* Closing */
.closing{background:var(--accent);color:var(--dark);padding:62px 0}
.closing .wrap{display:flex;align-items:center;justify-content:space-between;gap:40px;flex-wrap:wrap}
.closing small{font-family:var(--mono);letter-spacing:2px;font-size:10px}
.closing h2{font-size:38px;font-weight:500;letter-spacing:-1.3px;line-height:1.35;margin:14px 0 13px}
.closing p{font-size:13px;color:#445a68;margin:0}
.closing .btn{background:var(--dark);color:var(--ink);white-space:nowrap}
.closing .btn:hover{background:#24313a}
/* Footer */
.footer{padding:40px 0 24px}
.footer-top{display:flex;justify-content:space-between;gap:30px;flex-wrap:wrap}
.footer p{font-size:12px;color:var(--muted);margin:0}
.footer .brand{font-size:17px}
.foot-links{display:flex;gap:26px;color:var(--muted);font-size:12px;flex-wrap:wrap;align-items:start}
.foot-links a:hover{color:var(--accent)}
.footer-bottom{border-top:1px solid var(--line);margin-top:30px;padding-top:18px;display:flex;justify-content:space-between;font-size:10px;color:#8296a2;gap:20px;flex-wrap:wrap}
/* Dialogs */
dialog{width:min(570px,calc(100% - 32px));max-height:90svh;overflow:auto;border:1px solid #435763;border-radius:7px;color:var(--ink);background:#161b1f;padding:32px;box-shadow:0 30px 100px #0009}
dialog::backdrop{background:#060c0fb5;backdrop-filter:blur(7px)}
.dialogtop{position:sticky;top:-32px;padding-top:32px;margin-top:-32px;background:#161b1f;z-index:3;display:flex;align-items:start;justify-content:space-between;gap:20px}
.dialogtop h2{font-size:24px;margin:12px 0 18px;font-weight:500}
.close{background:none;border:1px solid #3b4d58;width:34px;height:34px;font-size:20px;flex:none}
.dialog-note{font-size:12px;color:var(--muted);margin:0 0 25px}
.formgrid{display:grid;grid-template-columns:1fr 1fr;gap:17px}
label{font-size:12px;display:block;margin-bottom:18px;color:#bfcbd3}
select,textarea,input[type=text],input[type=email],input[type=tel]{display:block;width:100%;border:1px solid #3d4a53;border-radius:2px;background:#0d1215;color:var(--ink);padding:12px;margin-top:8px;min-width:0}
textarea{min-height:90px;resize:vertical}
form .btn{width:100%}
.result{border-top:1px solid #40515c;padding-top:20px;margin-top:24px}
.result h3{font-weight:500;font-size:18px}
.result pre{font:13px/1.9 var(--font);white-space:pre-wrap;color:#b1c1cc}
.result .btn{font-size:12px;padding:10px 15px;width:auto}
.privacy-list{font-size:13px;color:var(--muted);line-height:2}
body:has(dialog[open]){overflow:hidden}
[hidden]{display:none!important}
.skip{position:absolute;left:16px;top:-100px;z-index:100;background:var(--accent);color:#111;padding:10px}
.skip:focus{top:8px}
/* ===== 内页组件 ===== */
.pagehead{padding:64px 0 56px;border-bottom:1px solid var(--line);position:relative;overflow:hidden}
.pagehead:before{content:"";position:absolute;width:520px;height:520px;background:radial-gradient(ellipse,rgba(139,179,70,.07),transparent 65%);right:-120px;top:-120px;pointer-events:none}
.crumbs{font-size:11px;color:var(--muted);margin-bottom:26px;display:flex;gap:10px;flex-wrap:wrap}
.crumbs a{border-bottom:1px solid #404d56}
.crumbs a:hover{color:var(--accent)}
.pagehead h1{font-size:clamp(32px,3.8vw,50px);line-height:1.3;letter-spacing:-1.5px;font-weight:500;margin:20px 0 18px;max-width:760px}
.pagehead h1 em{font-style:normal;color:var(--accent)}
.pagehead .lede{max-width:620px;color:var(--muted);font-size:15px;line-height:1.95;margin:0 0 28px}
.pagehead .meta-row{display:flex;gap:26px;flex-wrap:wrap;font-size:11px;color:#768c9a;font-family:var(--mono);letter-spacing:1px}
.prose{max-width:760px}
.prose h2{font-size:27px;font-weight:500;letter-spacing:-.6px;margin:56px 0 18px;line-height:1.4}
.prose h3{font-size:19px;font-weight:500;margin:36px 0 12px}
.prose p{color:var(--muted);font-size:14px;margin:0 0 16px}
.prose ul,.prose ol{color:var(--muted);font-size:14px;padding-left:22px;margin:0 0 16px}
.prose li{margin-bottom:8px}
.prose strong{color:var(--ink);font-weight:500}
.prose .note{border-left:2px solid var(--accent);padding:4px 0 4px 18px;color:#bfcbd3;font-size:13px;margin:22px 0}
.split{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:start}
.split-uneven{display:grid;grid-template-columns:.9fr 1.3fr;gap:70px;align-items:start}
.cards-2{display:grid;grid-template-columns:1fr 1fr;gap:1px;background:var(--line);border:1px solid var(--line)}
.cards-2>div{background:var(--bg);padding:30px}
.cards-2 h3{font-size:18px;font-weight:500;margin:0 0 12px}
.cards-2 p{font-size:13px;color:var(--muted);margin:0 0 10px}
.cards-2 ul{font-size:13px;color:var(--muted);padding-left:18px;margin:10px 0 0}
.cards-2 li{margin-bottom:6px}
.cards-2 .mono{color:#688292;display:block;margin-bottom:14px}
.cards-3{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line)}
.cards-3>div{background:var(--bg);padding:26px}
.cards-3 h3{font-size:16px;font-weight:500;margin:0 0 10px}
.cards-3 p{font-size:12px;color:var(--muted);margin:0}
.cards-3 .mono{color:#688292;display:block;margin-bottom:12px}
.dlv{border:1px solid var(--line)}
.dlv-row{display:grid;grid-template-columns:200px 1fr;border-bottom:1px solid var(--line)}
.dlv-row:last-child{border-bottom:0}
.dlv-row>div{padding:18px 22px;font-size:13px}
.dlv-row>div:first-child{color:#7891a1;font-family:var(--mono);font-size:10px;letter-spacing:1.2px;border-right:1px solid var(--line);display:flex;align-items:center}
.dlv-row>div:last-child{color:var(--muted)}
.dlv-row strong{color:var(--ink);font-weight:500}
.fit{border:1px solid var(--line);display:grid;grid-template-columns:1fr 1fr}
.fit>div{padding:26px}
.fit>div:first-child{border-right:1px solid var(--line)}
.fit h3{font-size:15px;font-weight:500;margin:0 0 14px;display:flex;align-items:center;gap:10px}
.fit h3:before{content:"";width:8px;height:8px;background:var(--accent)}
.fit>div:last-child h3:before{background:#5b6f7b}
.fit ul{font-size:13px;color:var(--muted);padding-left:18px;margin:0}
.fit li{margin-bottom:8px}
.faq details{border-top:1px solid var(--line)}
.faq details:last-child{border-bottom:1px solid var(--line)}
.faq summary{list-style:none;cursor:pointer;padding:20px 0;font-size:15px;font-weight:500;display:flex;justify-content:space-between;gap:20px;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary:after{content:"+";font-size:20px;color:#728896;flex:none}
.faq details[open] summary:after{content:"−";color:var(--accent)}
.faq details>div{padding:0 0 22px;font-size:13px;color:var(--muted);max-width:680px}
.cta-band{border:1px solid #3a4e5a;background:#12181c;padding:38px;display:flex;justify-content:space-between;align-items:center;gap:30px;flex-wrap:wrap;margin:64px 0 0}
.cta-band h2{font-size:24px;font-weight:500;margin:0 0 8px;letter-spacing:-.5px}
.cta-band p{font-size:13px;color:var(--muted);margin:0;max-width:460px}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line);border:1px solid var(--line);margin-top:56px}
.related a{background:var(--bg);padding:24px;font-size:14px;display:block}
.related a:hover{background:#1b2227;color:var(--accent)}
.related small{display:block;font-size:10px;color:#7891a1;font-family:var(--mono);letter-spacing:1.4px;margin-bottom:10px}
/* Contact page */
.contact-grid{display:grid;grid-template-columns:.85fr 1.3fr;gap:80px;align-items:start}
.contact-side h2{font-size:22px;font-weight:500;margin:34px 0 10px}
.contact-side p,.contact-side li{font-size:13px;color:var(--muted)}
.contact-side ul{padding-left:18px}
.contact-form{border:1px solid var(--line);padding:36px;background:#101518}
.contact-form .btn{margin-top:6px}
.checkline{display:flex;gap:12px;align-items:flex-start;font-size:12px;color:var(--muted);margin-bottom:18px}
.checkline input{width:18px;height:18px;margin-top:2px;accent-color:var(--accent);flex:none}
.form-status{font-size:13px;margin-top:16px;padding:14px 16px;border:1px solid var(--line)}
.form-status.ok{border-color:#3f637a;color:var(--accent)}
.form-status.err{border-color:#7a4a3f;color:#e8a58f}
/* 404 */
.nf{padding:110px 0 90px;text-align:left}
.nf .code{font-family:var(--mono);font-size:12px;letter-spacing:3px;color:var(--accent)}
.nf h1{font-size:clamp(40px,6vw,72px);font-weight:500;letter-spacing:-2px;margin:18px 0}
.nf p{color:var(--muted);max-width:480px;font-size:14px}
.nf .links{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
/* Animations */
@keyframes trace{to{stroke-dashoffset:-780}}
@keyframes breathe{50%{transform:translateY(-8px)}}
@keyframes pulse{50%{opacity:.35}}
/* Responsive */
@media(min-width:1600px){.hero h1{font-size:70px}.hero-grid{min-height:580px}}
@media(max-width:1100px){
.wrap{width:calc(100% - 64px)}
.navlinks{gap:18px}.navcta{display:none}
.hero h1{font-size:49px}.visual{height:440px}.hero-grid{min-height:470px}
.entry-strip{grid-template-columns:130px repeat(4,1fr)}.entry-strip a{padding:20px 12px}
.services{grid-template-columns:repeat(2,1fr)}
.service:nth-child(2){border-right:0}
.service:nth-child(-n+2){border-bottom:1px solid var(--line)}
.method-grid,.knowledge-grid{gap:45px}
.hero-copy{font-size:14px}
.section-head h2,.method-intro h2{font-size:31px}
.split,.split-uneven,.contact-grid{grid-template-columns:1fr;gap:44px}
.cards-3{grid-template-columns:1fr}
.related{grid-template-columns:1fr}
}
@media(max-width:740px){
.wrap{width:calc(100% - 40px)}
.topnote .wrap{font-size:9px}.topnote .note-right{display:none}
.nav{height:74px}.brand{font-size:18px}.brand svg{width:31px}
.menu{display:block}
.navlinks{display:none;position:absolute;top:74px;left:0;right:0;background:#13191d;padding:24px;flex-direction:column;align-items:start;border-bottom:1px solid #3f4e58;gap:18px}
.navlinks.open{display:flex}
.hero{padding-top:44px}.hero-grid{display:block}
.hero h1{font-size:45px;letter-spacing:-1.6px;margin:23px 0}
.hero-copy{font-size:14px;line-height:1.9}
.actions{gap:22px;margin:27px 0 18px}
.btn{padding:13px 18px;gap:22px;font-size:13px}
.visual{height:355px;margin-top:36px}
.visual-label{font-size:8px;left:17px;right:17px}
.signal-label.a{top:75px;left:15px}.signal-label.b{top:229px;right:15px}
.mini-coord{top:220px;left:17px}
.visual-caption{bottom:18px;left:17px;right:17px;padding-top:11px}
.visual-caption strong{font-size:13px}.visual-caption small{font-size:8px}
.entry-strip{margin-top:33px;grid-template-columns:1fr 1fr}
.entry-strip>span{grid-column:1/-1;padding:15px 0}
.entry-strip a{border-top:1px solid var(--line);border-left:0;padding:17px 0}
.entry-strip a:nth-of-type(2n){border-left:1px solid var(--line);padding-left:20px}
.section{padding:64px 0}
.section-head{display:block;margin-bottom:28px}
.section-head h2,.method-intro h2{font-size:29px}
.section-head p{margin-top:20px}
.services{grid-template-columns:1fr}
.service{border-right:0;border-bottom:1px solid var(--line);min-height:0}
.service:last-child{border-bottom:0}
.workbench{display:block}
.scene-nav{border-right:0;border-bottom:1px solid #c1cbd1;padding-bottom:8px}
.scene-content{padding:28px 0 6px}
.flow-row{grid-template-columns:1fr;gap:10px}
.flow-arrow{transform:rotate(90deg)}
.method-grid{display:block;gap:0}
.method-intro{margin-bottom:34px}
.knowledge-grid{display:block;gap:0}
.articles{margin-top:26px}
.closing .wrap{display:block}
.closing .btn{margin-top:24px}
.cards-2{grid-template-columns:1fr}
.fit{grid-template-columns:1fr}
.fit>div:first-child{border-right:0;border-bottom:1px solid var(--line)}
.dlv-row{grid-template-columns:1fr}
.dlv-row>div:first-child{border-right:0;border-bottom:1px solid var(--line);padding-bottom:8px}
.contact-form{padding:24px}
.cta-band{padding:26px}
.formgrid{grid-template-columns:1fr}
.footer-top{display:block}
.foot-links{margin-top:22px}
.footer-bottom{flex-direction:column;gap:8px}
}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}

/* ============================================================
   首页视觉与交互升级（2026-09-07）
   全部样式以 body.page-home 作用域隔离，不影响内页既有组件。
   ============================================================ */

/* ---- 滚动渐显：仅 JS 激活 .js-reveal 后才隐藏，无 JS / 减少动效时始终可见 ---- */
.js-reveal .page-home [data-reveal]{opacity:0;transform:translateY(26px);transition:opacity .7s cubic-bezier(.22,.8,.3,1),transform .7s cubic-bezier(.22,.8,.3,1)}
.js-reveal .page-home [data-reveal].revealed{opacity:1;transform:none}
.page-home [data-reveal]:nth-child(2){transition-delay:.08s}

/* ---- 首屏：排版对比与视觉面板细节 ---- */
.page-home .hero{padding:88px 0 0}
.page-home .hero-grid{gap:56px}
.page-home .hero h1{font-size:clamp(44px,5vw,74px);letter-spacing:-2.6px;line-height:1.18}
.page-home .hero-copy{font-size:16.5px}
.page-home .hero .subnote{display:flex;align-items:center;gap:10px}
.page-home .hero .subnote:before{content:"";width:34px;height:1px;background:#3e4d56}

/* 视觉面板：四角标尺刻度 + 底部坐标轴，强化"工程图纸"感 */
.page-home .visual{box-shadow:0 24px 70px -30px rgba(0,0,0,.65)}
.page-home .visual:after{content:"";position:absolute;inset:12px;pointer-events:none;
background:
linear-gradient(#426074,#426074) left top/14px 1px,
linear-gradient(#426074,#426074) left top/1px 14px,
linear-gradient(#426074,#426074) right top/14px 1px,
linear-gradient(#426074,#426074) right top/1px 14px,
linear-gradient(#426074,#426074) left bottom/14px 1px,
linear-gradient(#426074,#426074) left bottom/1px 14px,
linear-gradient(#426074,#426074) right bottom/14px 1px,
linear-gradient(#426074,#426074) right bottom/1px 14px;
background-repeat:no-repeat;opacity:.8}

/* ---- 承诺条（替代原 entry-strip 导航）：三条可核验合作口径 ---- */
.page-home .promise-strip{display:grid;grid-template-columns:repeat(3,1fr);margin-top:64px;border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.page-home .promise{padding:26px 28px 24px;border-left:1px solid var(--line);position:relative;transition:background .25s}
.page-home .promise:first-child{border-left:0;padding-left:0}
.page-home .promise:hover{background:#141c21}
.page-home .promise-num{font-family:var(--mono);font-size:10px;letter-spacing:2px;color:#688292;display:block;margin-bottom:12px}
.page-home .promise b{font-weight:500;font-size:16px;display:block;margin-bottom:8px}
.page-home .promise p{font-size:12px;color:var(--muted);margin:0;line-height:1.8}

/* ---- 服务卡：序号大字符、hover 抬升与顶部亮线 ---- */
.page-home .services{position:relative}
.page-home .service{position:relative;overflow:hidden}
.page-home .service:before{content:"";position:absolute;left:0;right:0;top:0;height:2px;background:var(--accent);transform:scaleX(0);transform-origin:left;transition:transform .35s cubic-bezier(.22,.8,.3,1)}
.page-home .service:hover:before{transform:scaleX(1)}
.page-home .service:after{content:attr(data-idx);position:absolute;right:14px;bottom:2px;font-family:var(--mono);font-size:64px;color:#9cc2da;opacity:.055;letter-spacing:-4px;pointer-events:none}
.page-home .service:hover{background:#182126}
.page-home .service:hover svg{stroke:#c1d8e7}
.page-home .service svg{transition:stroke .25s}
.page-home .card-action{position:relative;z-index:1}

/* ---- 场景工作台：选中态左侧标记、流程块细节 ---- */
.page-home .scene-tab{position:relative;transition:color .2s,padding-left .25s}
.page-home .scene-tab:before{content:"";position:absolute;left:-1px;top:0;bottom:0;width:2px;background:#204054;transform:scaleY(0);transition:transform .3s}
.page-home .scene-tab[aria-selected=true]:before{transform:scaleY(1)}
.page-home .scene-tab:hover{color:#1b2c37}
.page-home .flow-block{transition:border-color .2s,transform .25s}
.page-home .flow-block:hover{border-color:#7390a3;transform:translateY(-2px)}
.page-home .flow-arrow{animation:nudge 2.6s ease-in-out infinite}
@keyframes nudge{50%{transform:translateX(4px)}}

/* ---- 交付方法：序号列与展开节奏 ---- */
.page-home .method-step summary{transition:padding-left .25s}
.page-home .method-step summary:hover{padding-left:8px}
.page-home .method-step summary small{font-size:12px;min-width:26px}
.page-home .method-step[open] summary b{color:var(--accent)}
.page-home .method-step>div{border-left:1px solid #2a3740;margin-left:12px;padding-left:30px}

/* ---- AIHub 知识区：条目 hover 位移 ---- */
.page-home .articles a{transition:color .2s,padding-left .25s}
.page-home .articles a:hover{padding-left:10px}

/* ---- 收束带：细网格纹理 ---- */
.page-home .closing{position:relative;overflow:hidden}
.page-home .closing:before{content:"";position:absolute;inset:0;background-image:linear-gradient(#141b2014 1px,transparent 1px),linear-gradient(90deg,#141b2014 1px,transparent 1px);background-size:44px 44px;pointer-events:none}
.page-home .closing .wrap{position:relative}

/* ---- 首页响应式补充 ---- */
@media(max-width:1100px){
.page-home .hero-grid{gap:30px}
.page-home .promise-strip{grid-template-columns:1fr;margin-top:44px}
.page-home .promise{border-left:0;border-top:1px solid var(--line);padding:20px 0}
.page-home .promise:first-child{border-top:0}
}
@media(max-width:740px){
.page-home .hero{padding-top:48px}
.page-home .hero h1{font-size:44px}
.page-home .service:after{font-size:44px}
.page-home .method-step>div{margin-left:10px;padding-left:20px}
}

/* 窄屏下 hero 文案取消强制换行，避免横向溢出 */
@media(max-width:740px){.page-home .hero-copy br{display:none}}

/* 2026-09-07: interior pages share the Fieldwork palette and typography. */
:root{--bg:#0a2538;--panel:#123248;--line:#365568;--muted:#b1c5d0;--ink:#eff3ec;--accent:#c5e4ed;--white:#f1f2e9;--dark:#132f43;--font:"Avenir Next","PingFang SC","Microsoft YaHei",sans-serif;--radius:0px}
.head{background:#0a2538ed}.brand svg path{stroke:var(--accent)}.navlinks a{color:#c9d8e1}.pagehead{padding:65px 0 55px;border-bottom:1px solid var(--line);background:#0b2c43}.pagehead h1{font-weight:400;letter-spacing:-1.8px;max-width:1000px}.pagehead h1 em{font-family:"Iowan Old Style","Songti SC",serif;font-weight:400}.crumbs{margin-bottom:36px}.prose{max-width:800px}.prose h2{font-weight:500;letter-spacing:-.6px}.prose p,.prose li{line-height:2}.btn,.navcta,.related a{border-radius:0}.related a{transition:background .3s,transform .3s}.related a:hover{transform:translateY(-3px);background:#20475c}.cta-band{background:#173f56}.footer{background:#071d2c}
@media(max-width:700px){.pagehead{padding:34px 0 35px}.pagehead h1{font-size:34px;line-height:1.4;letter-spacing:-1px}.navlinks.open{background:#102f43}.prose p,.prose li{font-size:14px}.brand svg{width:30px}}

/* 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}

.contact-email{display:inline-block;font-size:clamp(16px,2vw,22px);color:var(--accent);border-bottom:1px solid var(--line);padding:8px 0;overflow-wrap:anywhere}.form-status{margin:24px 0;padding:18px 20px;border:1px solid var(--line);font-size:14px;line-height:1.8}.form-status.ok{border-color:var(--accent)}.form-status.err{border-color:#e5ab80;color:#ffdbbf}#f-submit:disabled{opacity:.6;cursor:wait}