/* 双飞 赛道技术档案：国际主义工单布局，碳黑/象牙白/拉丝银，油封朱红只作关键状态色；视频信息先于装饰。 */
:root{--ink:#111412;--ink-2:#1a1e1c;--paper:#f4f0e8;--paper-2:#e9e4da;--metal:#a9afa8;--line:rgba(231,226,215,.24);--red:#c83c27;--red-dark:#9c2b1b;--text:#252824;--mono:"SFMono-Regular","Cascadia Mono","Microsoft YaHei",monospace;--sans:"PingFang SC","Microsoft YaHei","Noto Sans CJK SC",Arial,sans-serif;--serif:"STSong","Songti SC","Noto Serif CJK SC",serif;--ease:cubic-bezier(.23,1,.32,1)}
.data-status{margin:12px 0 0!important;color:#dedbd3!important;font:10px/1.4 var(--mono)!important;letter-spacing:.02em}.credibility-section{padding:72px 5vw;background:#f5f1e8}.credibility-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#c7c1b7;border:1px solid #c7c1b7;margin-top:28px}.credibility-grid article{background:#f5f1e8;padding:24px}.credibility-grid h3{font:700 20px/1.3 var(--serif);margin:12px 0}.credibility-grid p{font-size:13px;color:#60665d;margin:0}.policy-list{margin:25px 0 0;border-top:1px solid #bbb5aa}.policy-list div{display:grid;grid-template-columns:145px 1fr;gap:18px;padding:15px 0;border-bottom:1px solid #bbb5aa}.policy-list dt{font:600 11px var(--mono);color:var(--red)}.policy-list dd{margin:0;font-size:13px;color:#5e635b}.notice-box{margin:0;padding:21px 24px;border-left:5px solid var(--red);background:#e8e2d7;color:#4f544d;font-size:13px}@media(max-width:640px){.credibility-grid{grid-template-columns:1fr}.policy-list div{grid-template-columns:1fr;gap:5px}}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--text);font-family:var(--sans);font-size:15px;line-height:1.7}a{color:inherit;text-decoration:none}button,input{font:inherit}.skip-link{position:fixed;left:12px;top:-60px;z-index:200;background:var(--red);color:#fff;padding:8px 14px}.skip-link:focus{top:12px}.topline{height:31px;padding:0 5vw;display:flex;align-items:center;justify-content:space-between;background:#090b0a;color:#a9afa8;font:10px/1 var(--mono);letter-spacing:.07em}.site-header{background:var(--ink);color:var(--paper);position:relative;z-index:10}.nav-shell{min-height:76px;padding:0 5vw;display:flex;align-items:center;gap:34px;border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:10px;font:bold 29px/1 var(--mono);letter-spacing:-.1em;min-width:116px}.brand img{width:34px;height:34px;object-fit:contain}.brand small{display:block;font:8px/1.1 var(--mono);letter-spacing:.08em;margin-top:3px;color:#b8b9b2}.main-nav{display:flex;align-items:stretch;gap:27px;margin-left:auto;height:76px}.main-nav a{font-size:14px;display:flex;align-items:center;position:relative;white-space:nowrap}.main-nav a::after{content:"";position:absolute;bottom:0;left:0;width:0;height:3px;background:var(--red);transition:width .2s var(--ease)}.main-nav a:hover::after,.main-nav a.active::after{width:100%}.nav-cta,.button.primary{background:var(--red);color:#fff;border:1px solid var(--red)}.nav-cta{padding:8px 17px;font-size:13px;white-space:nowrap;transition:background .16s var(--ease)}.nav-cta:hover{background:var(--red-dark)}.menu-toggle{display:none}.search-bar{padding:13px 5vw 16px;display:grid;grid-template-columns:215px minmax(220px,520px) 1fr;gap:20px;align-items:center;border-bottom:1px solid var(--line)}.search-bar label{font:11px var(--mono);color:#c4c4bc;letter-spacing:.06em}.search-bar div{display:flex;border-bottom:1px solid #8a8d85}.search-bar input{min-width:0;width:100%;border:0;background:transparent;color:#fff;padding:8px 4px;outline:0}.search-bar input::placeholder{color:#969990}.search-bar button{border:0;background:transparent;color:var(--red);font-weight:700;white-space:nowrap;padding:5px 0 5px 15px;cursor:pointer}.search-feedback{font-size:11px;color:#a9afa8;margin:0}.hero{position:relative;min-height:670px;background:#121512;overflow:hidden;display:flex;align-items:flex-end}.hero-image{width:100%;height:100%;position:absolute;inset:0;object-fit:cover;object-position:center}.hero-shade{position:absolute;inset:0;background:linear-gradient(90deg,rgba(10,12,10,.95) 0%,rgba(10,12,10,.78) 36%,rgba(10,12,10,.16) 73%,rgba(10,12,10,.32)),linear-gradient(0deg,rgba(10,12,10,.7),transparent 55%)}.hero-copy{width:min(680px,68vw);position:relative;z-index:2;margin:0 5vw 78px}.eyebrow{font:11px/1.25 var(--mono);letter-spacing:.12em;color:var(--red);margin:0 0 16px;font-weight:600}.hero h1,.page-hero h1{margin:0;color:#fff;font:900 clamp(43px,7.2vw,94px)/1.05 var(--serif);letter-spacing:-.07em}.hero h1 span{display:block;color:#d4d2c9;font:500 clamp(16px,2.1vw,25px)/1.2 var(--sans);letter-spacing:.03em;margin-bottom:13px}.hero-lead{max-width:560px;margin:27px 0 25px;color:#eeece4;font-size:16px}.hero-actions{display:flex;gap:11px;flex-wrap:wrap}.button{display:inline-flex;align-items:center;justify-content:center;padding:12px 18px;font-weight:700;font-size:14px;transition:transform .16s var(--ease),background .16s var(--ease)}.button:hover{transform:translateY(-2px)}.button:active{transform:scale(.97)}.button.ghost{border:1px solid rgba(255,255,255,.55);color:#fff}.hero-stats{margin-top:37px;display:flex;gap:28px}.hero-stats span{font-size:11px;color:#c2c1bb;display:flex;flex-direction:column}.hero-stats b{color:#fff;font:500 23px/1.1 var(--mono);margin-bottom:5px}.hero-stamp{position:absolute;right:5vw;bottom:49px;width:104px;height:104px;z-index:2;border:2px solid var(--red);border-radius:50%;display:grid;place-content:center;text-align:center;color:var(--red);font:700 31px/.8 var(--mono);transform:rotate(-12deg)}.hero-stamp span{font-size:8px;letter-spacing:.1em}.work-section{padding:92px 5vw;border-bottom:1px solid #d2ccc0;position:relative}.manifesto{background:var(--paper);display:grid;grid-template-columns:90px minmax(280px,1.2fr) minmax(240px,.8fr);gap:42px;align-items:start}.section-number{font:500 52px/1 var(--mono);color:var(--red)}h2{margin:0;font:900 clamp(28px,4vw,54px)/1.18 var(--serif);letter-spacing:-.06em;color:var(--ink)}h3{margin:0}.manifesto>p{margin:8px 0 0;color:#5d625b}.feature-stage{background:#e8e4dc}.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:35px}.section-heading>p{max-width:370px;margin:0;font-size:13px;color:#656961}.video-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr;gap:16px}.video-card{height:346px;background:#161916;position:relative;overflow:hidden;color:#fff;isolation:isolate}.video-card img{width:100%;height:100%;object-fit:cover;transition:transform .45s var(--ease)}.video-card:hover img,.video-card.is-hover img{transform:scale(1.055)}.card-shade{position:absolute;z-index:1;inset:0;background:linear-gradient(0deg,rgba(7,8,7,.86),transparent 67%)}.video-duration{position:absolute;top:13px;right:13px;z-index:2;background:rgba(10,11,10,.86);font:10px var(--mono);padding:5px 7px}.play-button{position:absolute;z-index:2;left:50%;top:48%;transform:translate(-50%,-50%) scale(.8);width:55px;height:55px;border:1px solid rgba(255,255,255,.9);border-radius:50%;background:rgba(200,60,39,.89);color:#fff;cursor:pointer;opacity:0;transition:.2s var(--ease);font-size:17px;padding-left:6px}.video-card:hover .play-button,.video-card.is-hover .play-button{opacity:1;transform:translate(-50%,-50%) scale(1)}.video-copy{position:absolute;z-index:2;bottom:0;padding:20px}.video-copy p{font:10px var(--mono);letter-spacing:.04em;color:#ddd9d0;margin:0 0 6px}.video-copy h3{font:700 20px/1.35 var(--serif);letter-spacing:-.03em}.metrics{display:flex;gap:13px;margin-top:12px;color:#d5d3cc;font:10px var(--mono)}.tag-row{display:flex;gap:9px;flex-wrap:wrap;margin-top:20px}.tag-row a,.page-tags span{border:1px solid #b8b5ad;padding:5px 10px;font:10px var(--mono);color:#5d605a}.tag-row a:hover{border-color:var(--red);color:var(--red)}.ai-section{background:var(--ink);color:#e9e4da;display:grid;grid-template-columns:90px minmax(260px,1fr) minmax(280px,.75fr);gap:42px}.ai-section h2{color:var(--paper)}.ai-content>p:not(.eyebrow){color:#c2c2ba;margin:23px 0 27px}.ai-section dl{border-top:1px solid var(--line);margin:0 0 25px}.ai-section dl div{display:grid;grid-template-columns:120px 1fr;gap:10px;padding:13px 0;border-bottom:1px solid var(--line)}.ai-section dt{font:11px var(--mono);color:#f0eee6}.ai-section dd{margin:0;font-size:12px;color:#b9b9b1}.text-link{color:var(--red);font-weight:700;font-size:13px}.ai-section figure,.contact-section figure{margin:0}.ai-section figure img,.contact-section figure img{width:100%;aspect-ratio:4/3;object-fit:cover;display:block}.ai-section figcaption,.contact-section figcaption{font:10px var(--mono);color:#9c9d94;margin-top:8px}.community-section{background:#f6f3eb}.community-columns{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid #b7b1a8}.community-columns article{padding:25px 28px 22px 0;border-right:1px solid #b7b1a8;margin-right:28px}.community-columns article:last-child{border:0;margin:0}.community-columns span,.role{color:var(--red);font:11px var(--mono)}.community-columns h3{font:700 24px/1.3 var(--serif);margin:16px 0 12px}.community-columns p{font-size:13px;color:#666b63;min-height:67px}.community-columns a{font-weight:700;color:var(--red);font-size:13px}.team-section{background:#e7e2d9}.expert-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:1px;background:#c7c1b7;border:1px solid #c7c1b7}.expert-grid article{background:#e7e2d9;padding:24px;min-height:265px;display:flex;flex-direction:column}.expert-grid h3{font:700 21px/1.35 var(--serif);margin:17px 0 11px}.expert-grid p{font-size:12px;color:#62675f;margin:0}.expert-actions{margin-top:auto;display:flex;gap:12px;padding-top:20px}.expert-actions button,.expert-actions a,.text-button{border:0;padding:0;background:transparent;color:var(--red);font:700 12px var(--sans);cursor:pointer}.expert-actions a{color:var(--text)}.partner-section{background:#191c19;color:var(--paper)}.partner-section h2{color:#fff;margin-bottom:15px}.partner-section>p:not(.eyebrow){max-width:600px;color:#bdbcb5;font-size:13px}.logo-wall{display:grid;grid-template-columns:repeat(6,1fr);margin-top:35px;border:1px solid #545753}.logo-wall span{padding:22px 11px;border-right:1px solid #545753;text-align:center;font:600 12px var(--mono);color:#d5d4cc}.logo-wall span:last-child{border:0}.join-section{background:var(--paper);display:grid;grid-template-columns:1.1fr .9fr;gap:82px}.join-section ol,.knowledge-panel ol{list-style:none;padding:0;margin:30px 0 0;border-top:1px solid #bbb5aa}.join-section li,.knowledge-panel li{display:grid;grid-template-columns:45px 1fr;gap:11px;padding:15px 0;border-bottom:1px solid #bbb5aa;font-size:13px}.join-section li b,.knowledge-panel li b{font:600 12px var(--mono);color:var(--red)}.join-section aside{border-left:5px solid var(--red);padding-left:27px}.join-section aside h3{font:700 25px/1.3 var(--serif);margin-bottom:16px}details{border-top:1px solid #c3bdb2;padding:14px 0}details:last-child{border-bottom:1px solid #c3bdb2}summary{font-size:13px;font-weight:700;cursor:pointer;list-style:none}summary::after{content:"+";float:right;color:var(--red);font-size:20px;font-weight:400}details[open] summary::after{content:"–"}details p{font-size:12px;color:#666b63;margin:9px 0 0}.reputation-section{background:#d9d3c8;display:grid;grid-template-columns:1.1fr .9fr;gap:80px;align-items:center}.reputation-section>div>p:not(.eyebrow){color:#5f635d}.audit-card{background:#1a1d1a;color:#ddd9ce;padding:32px;border-left:5px solid var(--red)}.audit-card strong{font:700 24px/1.2 var(--serif);display:block;color:#fff}.audit-card span{display:inline-block;margin:13px 0;background:var(--red);padding:3px 7px;font:10px var(--mono)}.audit-card p{font-size:12px;margin-bottom:0;color:#c0c0b9}.contact-section{background:#f6f3eb;display:grid;grid-template-columns:1fr .75fr;gap:55px}.contact-section>div>p:not(.eyebrow){max-width:680px;color:#636860}.contact-list{margin:25px 0;border-top:1px solid #c4bdb2}.contact-list p{border-bottom:1px solid #c4bdb2;margin:0;padding:10px 0;font-size:13px}.contact-list b{display:inline-block;width:86px;color:var(--red);font:11px var(--mono)}.share-row{display:flex;align-items:center;gap:7px;flex-wrap:wrap;margin-top:23px;font-size:12px}.share-row button{border:1px solid #aaa49a;background:transparent;padding:5px 10px;font-size:11px;cursor:pointer}.share-row button:hover{border-color:var(--red);color:var(--red)}.site-footer{background:#090b0a;color:#d7d4cb}.footer-rail{padding:12px 5vw;border-bottom:1px solid #343733;display:flex;justify-content:space-between;font:10px var(--mono);color:#979990}.footer-grid{padding:50px 5vw;display:grid;grid-template-columns:2fr 1fr 1.2fr 1fr;gap:40px}.footer-brand{margin-bottom:17px}.footer-grid p{font-size:12px;color:#acaea6;max-width:400px}.fine-print{font-size:10px!important;line-height:1.6}.footer-grid h3{font:600 12px var(--mono);letter-spacing:.08em;margin:6px 0 14px;color:#fff}.footer-grid section:not(:first-child)>a{display:block;font-size:12px;color:#b3b4ac;margin:7px 0}.footer-grid section:not(:first-child)>a:hover{color:var(--red)}.footer-grid section:nth-child(3) p{margin:7px 0}.qr-pair{display:flex;flex-wrap:wrap;gap:8px;align-content:start}.qr-pair h3,.qr-pair p{width:100%}.qr-pair img{width:69px;height:69px;object-fit:cover;background:#fff}.qr-pair p{font-size:10px!important;line-height:1.5}.footer-bottom{border-top:1px solid #343733;padding:13px 5vw;display:flex;justify-content:space-between;gap:13px;font:10px var(--mono);color:#969990}.footer-bottom a:hover{color:var(--red)}.video-dialog{display:none;position:fixed;z-index:100;inset:0;align-items:center;justify-content:center;padding:20px}.video-dialog.is-visible{display:flex}.dialog-backdrop{position:absolute;inset:0;background:rgba(4,5,4,.85)}.dialog-card{position:relative;width:min(560px,100%);background:#ece8df;color:#222;padding:17px;z-index:2;border-top:5px solid var(--red)}.dialog-close{position:absolute;right:8px;top:6px;border:0;background:none;font-size:27px;cursor:pointer}.dialog-player{height:270px;background:#171a17;display:grid;place-content:center;color:#fff;text-align:center}.play-pulse{color:var(--red);font-size:50px}.dialog-player p{font:11px var(--mono);letter-spacing:.08em}.dialog-card h3{font:700 25px/1.3 var(--serif);margin:18px 0 7px}.dialog-card>p{font-size:12px;margin:0;color:#656860}.subpage-main{background:var(--paper);min-height:600px}.breadcrumb{padding:22px 5vw 0;color:#72756e;font-size:12px}.breadcrumb a{color:var(--red)}.breadcrumb span{margin-left:7px}.page-hero{padding:72px 5vw 80px;background:#161916;color:var(--paper);border-bottom:5px solid var(--red)}.page-hero>p:not(.eyebrow){max-width:690px;font-size:16px;color:#c6c7bf;margin:21px 0 26px}.page-tags{display:flex;gap:7px;flex-wrap:wrap}.page-tags span{border-color:#666960;color:#d4d3cc}.subpage-shelf{padding:80px 5vw;background:#e9e4da}.compact-grid{grid-template-columns:repeat(3,1fr)}.knowledge-panel{padding:80px 5vw;background:#111411;color:#e9e5db;display:grid;grid-template-columns:1fr 1fr;gap:70px}.knowledge-panel h2{color:#fff;margin-bottom:16px}.knowledge-panel p:not(.eyebrow){color:#bcbdb5}.knowledge-panel ol{border-color:#4b4e49;margin:0}.knowledge-panel li{border-color:#4b4e49}.cross-links{padding:70px 5vw;background:#f3efe6}.cross-links h2{margin-bottom:26px}.cross-links a{display:inline-block;border:1px solid #bdb7ad;padding:10px 13px;margin:0 7px 7px 0;font-size:12px}.cross-links a:hover{background:var(--red);border-color:var(--red);color:#fff}@media(max-width:900px){.nav-shell{gap:16px}.main-nav{gap:15px}.search-bar{grid-template-columns:1fr 1.5fr}.search-feedback{display:none}.manifesto,.ai-section{grid-template-columns:50px 1fr;gap:22px}.manifesto>p,.ai-section figure{grid-column:2}.ai-section{padding-right:10vw}.video-grid{grid-template-columns:1fr 1fr}.featured-card{grid-row:span 1}.community-columns{grid-template-columns:1fr}.community-columns article{border-right:0;border-bottom:1px solid #b7b1a8;margin-right:0;padding-right:0}.expert-grid{grid-template-columns:1fr 1fr}.logo-wall{grid-template-columns:repeat(3,1fr)}.logo-wall span:nth-child(3){border-right:0}.logo-wall span:nth-child(-n+3){border-bottom:1px solid #545753}.join-section,.reputation-section,.contact-section{grid-template-columns:1fr;gap:45px}.footer-grid{grid-template-columns:1.7fr 1fr 1fr}.qr-pair{grid-column:1/-1}}@media(max-width:640px){body{font-size:14px}.topline span:last-child{display:none}.nav-shell{min-height:66px;padding:0 20px}.main-nav{display:none;position:absolute;left:0;right:0;top:66px;height:auto;background:#111412;border-bottom:1px solid var(--line);padding:8px 20px 15px;flex-direction:column;gap:0}.main-nav.is-open{display:flex}.main-nav a{height:43px}.menu-toggle{display:grid;gap:5px;margin-left:auto;border:0;background:transparent;padding:6px;cursor:pointer}.menu-toggle span{width:20px;height:1px;background:#fff}.nav-cta{display:none}.search-bar{padding:10px 20px 14px;display:block}.search-bar label{display:none}.search-bar div{width:100%}.hero{min-height:595px}.hero-copy{width:auto;margin:0 20px 47px}.hero h1{font-size:48px}.hero-lead{font-size:14px}.hero-stats{gap:17px;margin-top:26px}.hero-stamp{right:20px;top:28px;bottom:auto;width:73px;height:73px;font-size:23px}.hero-stamp span{font-size:6px}.work-section{padding:61px 20px}.manifesto,.ai-section{grid-template-columns:1fr;gap:19px}.section-number{font-size:40px}.manifesto>p,.ai-section figure{grid-column:auto}.section-heading{display:block;margin-bottom:27px}.section-heading>p{margin-top:15px}.video-grid,.compact-grid{grid-template-columns:1fr}.video-card{height:290px}.ai-section{padding-right:20px}.community-columns h3{font-size:22px}.expert-grid{grid-template-columns:1fr}.logo-wall{grid-template-columns:repeat(2,1fr)}.logo-wall span:nth-child(3){border-right:1px solid #545753}.logo-wall span:nth-child(2n){border-right:0}.logo-wall span:nth-child(-n+4){border-bottom:1px solid #545753}.join-section aside{padding-left:17px}.footer-rail{display:block;line-height:1.8}.footer-grid{padding:42px 20px;grid-template-columns:1fr;gap:27px}.qr-pair{grid-column:auto}.footer-bottom{padding:13px 20px;flex-wrap:wrap}.breadcrumb{padding:17px 20px 0}.page-hero{padding:55px 20px}.knowledge-panel{padding:58px 20px;grid-template-columns:1fr;gap:25px}.cross-links{padding:55px 20px}.dialog-player{height:200px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{scroll-behavior:auto!important;transition-duration:.01ms!important;animation-duration:.01ms!important}}