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.system-section{background:var(--dark);color:var(--light);padding:105px 0 70px}.section-heading{display:flex;justify-content:space-between;gap:70px;align-items:end;margin-bottom:42px}.section-heading p{font-size:17px;line-height:1.9;color:#d3ded2}.platform-tabs{display:flex;gap:32px;margin-bottom:22px}.platform-tabs button{border-bottom:2px solid transparent;padding:12px 0;font-size:14px;min-height:44px}.platform-tabs [aria-selected=true]{border-color:var(--red)}.platform-image{background:#171d19}.platform-image img{width:100%;height:auto;max-height:67svh;object-fit:contain;display:block}.platform-image figcaption{padding:10px 0;background:var(--dark);color:#b9c4b6}.platform-description{display:flex;justify-content:space-between;gap:7%;margin-top:23px;align-items:start}.platform-description h3{font-size:31px}.platform-description p{max-width:460px;font-size:15px;line-height:1.9;color:#d0dccd}.system-chain{display:flex;align-items:center;justify-content:space-between;max-width:820px;gap:22px;font-size:17px;margin-top:44px;border-top:1px solid #a6b29b50;padding:25px 0}.system-chain .icon{color:#a6b29b}.system-section .quiet-note{color:#b9c4b6}.safety-section{padding:100px 0 90px}.safety-layout{display:grid;grid-template-columns:1fr 1fr;gap:13%}.safety-lead{font-size:19px;margin:24px 0 20px}.safety-steps>button{width:100%;display:flex;align-items:center;justify-content:space-between;min-height:65px;padding:16px 0;border-top:1px solid #bcc3b6;font-size:18px;text-align:left}.safety-steps>button[aria-expanded=true] .icon{transform:rotate(45deg)}.safety-steps>div{padding:0 0 27px;color:var(--muted);font-size:15px;line-height:1.9}.history-track{height:235svh;background:var(--dark);color:white}.history-images,.history-images img,.history-shade{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}.history-images img{opacity:0;transition:opacity .7s ease}.history-images img.active{opacity:1}.history-images img[data-year-image="1"]{object-position:center 35%}.history-shade{background:linear-gradient(0deg,#111e16e6,transparent 90%),linear-gradient(90deg,#111e164f,transparent)}.history-stage>h2{position:absolute;top:calc(var(--header) + 35px);left:var(--gutter);font-size:clamp(36px,4vw,60px)}.history-body{position:absolute;bottom:22%;left:var(--gutter);right:var(--gutter);display:grid;grid-template-columns:1fr 1fr;align-items:end;gap:13%}.history-body>strong{font-weight:400;font-size:clamp(100px,15vw,210px);line-height:.95;letter-spacing:-.06em;font-variant-numeric:tabular-nums}.history-body h3{font-size:clamp(30px,3vw,44px);margin-bottom:20px}.history-body p{font-size:16px;line-height:1.85;margin-bottom:15px}.history-body #history-meaning{font-size:13px;color:#d2dfd0}.history-body .text-link{font-size:13px}.history-controls{position:absolute;bottom:65px;left:var(--gutter);right:var(--gutter);display:flex;gap:35px;border-bottom:1px solid #dbe4d545}.history-controls button{font-size:19px;min-height:50px;padding:10px 28px 10px 0;border-bottom:2px solid transparent}.history-controls [aria-selected=true]{border-color:white}.history-stage>p{position:absolute;bottom:24px;left:var(--gutter);right:var(--gutter);font-size:11px;color:#d5e0d0}.founder-section{background:var(--dark);color:var(--light);padding:100px 0 75px}.founder-layout{display:grid;grid-template-columns:1.02fr 1fr;gap:10%}.founder-copy h2{font-size:clamp(34px,3.5vw,52px);margin:0 0 42px}.founder-copy h3{font-size:30px}.founder-copy h3 span{font-size:15px;margin-left:10px}.founder-role{font-size:13px;color:#bcc8b8;margin-top:10px}.founder-lead{font-size:20px;line-height:1.8;margin:30px 0 24px}.founder-copy>p:last-child{font-size:15px;line-height:2;color:#d0dccd}.founder-layout figure img{display:block;width:100%;height:540px;object-fit:cover}.founder-layout figure figcaption{color:#b8c6b5;margin-top:10px}.team-story{display:grid;grid-template-columns:1fr 1fr;gap:10%;border-top:1px solid #c1cbb33b;margin-top:65px;padding-top:40px}.team-story h3{font-size:38px}.team-story p{font-size:16px;color:#cfdbcb;line-height:1.9;margin-bottom:20px}.team-story .text-link{font-size:13px}.contact-section{padding:90px 0}.contact-section .wrap{display:grid;grid-template-columns:1fr auto;gap:30px;align-items:center}.contact-section h2{font-size:clamp(35px,3.5vw,52px)}.contact-email{grid-column:2;font-size:14px;color:var(--muted)}footer{border-top:1px solid #d2d6cb;padding:35px 0 25px}footer>.wrap{display:flex;justify-content:space-between;align-items:start;gap:30px}footer .logo{width:135px}footer p{font-size:12px;color:var(--muted)}footer details{max-width:370px;font-size:12px}footer summary{cursor:pointer;min-height:44px}footer nav{display:flex;flex-wrap:wrap;gap:15px;margin-top:14px}footer nav a{border-bottom:1px solid #acb4a4}
.visual-menu{border:0;padding:0;width:100%;max-width:none;height:100svh;max-height:none;margin:0;background:var(--dark);color:var(--light);position:fixed;inset:0;opacity:0;transition:opacity .2s ease;overflow:auto}.visual-menu::backdrop{background:var(--dark)}.visual-menu.is-open{opacity:1}.menu-top{height:var(--header);padding:18px var(--gutter);display:flex;align-items:center;justify-content:space-between}.menu-top button{display:flex;align-items:center;gap:15px;font-size:13px;min-height:44px}.menu-body{min-height:calc(100svh - 180px);display:grid;grid-template-columns:1.1fr 1fr;gap:10%;align-items:center;padding:25px var(--gutter) 45px}.menu-links{opacity:0;transform:translateY(12px);transition:opacity .45s .14s,transform .55s .14s cubic-bezier(.16,1,.3,1)}.visual-menu.is-open .menu-links{opacity:1;transform:none}.menu-links nav{display:flex;flex-direction:column}.menu-links nav a{font-size:clamp(33px,3.65vw,54px);font-weight:500;line-height:1.3;padding:13px 0;display:flex;align-items:center;gap:25px;color:#a6b39e;transition:color .22s}.menu-links nav a span{font-size:12px;font-weight:400;letter-spacing:0;color:#a6b39e}.menu-links nav a.active,.menu-links nav a:hover{color:var(--light)}.menu-links nav a.active span{color:#ff4b62}.menu-secondary{display:flex;gap:35px;font-size:13px;margin-top:30px;color:#cad6c5}.menu-secondary a{min-height:44px;display:flex;align-items:center}.menu-preview{opacity:0;transform:translateX(20px);transition:opacity .55s .23s,transform .65s .23s cubic-bezier(.16,1,.3,1)}.visual-menu.is-open .menu-preview{opacity:1;transform:none}.menu-media{position:relative;aspect-ratio:1.14;background:#383e35;overflow:hidden}.preview-layer{position:absolute;inset:0;opacity:0;transition:opacity .4s ease;pointer-events:none}.preview-layer.active{opacity:1}.preview-layer img{width:100%;height:100%;object-fit:cover}.preview-layer.product-preview{background:var(--paper)}.product-preview img{object-fit:contain;padding:20px}.product-preview canvas{width:100%;height:100%;display:block}.product-preview canvas[hidden],.product-preview img[hidden]{display:none}.menu-preview>p{font-size:13px;margin-top:20px;color:#cad6c5}.menu-foot{display:flex;justify-content:space-between;gap:25px;padding:15px var(--gutter) 24px;font-size:11px;color:#b0bea9}.visual-menu.is-closing{opacity:0;transition-duration:.16s}.visual-menu.is-closing .menu-links,.visual-menu.is-closing .menu-preview{transition-delay:0s;transition-duration:.12s;transform:none}#film-dialog{border:0;width:min(1100px,92vw);max-height:94svh;background:var(--dark);color:white;padding:22px}#film-dialog::backdrop{background:#111e15e6}.film-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}.film-top h2{font-size:22px}.film-top button{min-height:44px;min-width:44px}#task-film{display:block;width:100%;max-height:70svh;background:black}#film-dialog>p{font-size:12px;color:#c8d5c0;margin-top:14px}
@media(min-width:1600px){.wrap{max-width:1600px;margin:auto}.product-stage{max-height:1100px}.lta-stage{left:5%;width:90%}}
@media(max-width:1000px){:root{--gutter:32px;--header:76px}.product-heading p{font-size:20px}.structure-detail{width:32%;padding-left:12px;top:40%}.structure-detail p{font-size:13px}.mission-flow{gap:6%;grid-template-columns:1fr 1fr}.flow-title h3{font-size:40px}.flow-explanation{font-size:14px}.section-heading{gap:30px}.history-body{gap:8%}.founder-layout{gap:7%}.founder-layout figure img{height:500px}.founder-copy h2{font-size:38px}.menu-body{gap:6%}.menu-links nav a{font-size:38px}}
@media(max-width:700px){:root{--gutter:22px;--header:70px}body{font-size:15px}.logo,.brand{width:127px}.header-actions{gap:20px}.contact-link{display:none}.header-actions button span{font-size:10px}.menu-mark{width:24px;margin-left:3px}.pinned{min-height:660px}.hero-copy{bottom:16%;max-width:95%;right:var(--gutter)}h1{font-size:clamp(42px,10.8vw,56px)}h2{font-size:38px}.hero-copy p,.mission-copy p{font-size:15px;line-height:1.9;margin:23px 0 25px}.intro-media img{object-position:center}.mission-copy{bottom:19%;right:var(--gutter);max-width:none}.mission-copy h2{font-size:38px}.scroll-cue{bottom:25px}.intro-track{height:175svh}.product-track{height:185svh}.product-stage{padding-top:calc(var(--header) + 24px)}.product-heading h2{font-size:34px}.product-heading p{font-size:17px;margin-top:15px}.lta-stage{inset:24% 0 20%}.product-introduction{top:calc(var(--header) + 117px);font-size:12px}.product-tools{bottom:54px;flex-direction:column;gap:13px;align-items:start}.product-tools>div{align-self:flex-end;gap:6px}.product-tools>span{font-size:10px}.product-boundary{bottom:20px;font-size:9px;gap:12px}.structure-node{width:44px;height:44px;min-height:44px;justify-content:center;padding:8px}.structure-node span{display:none}.structure-node .icon{width:27px;height:27px}.structure-detail{top:auto;bottom:132px;left:var(--gutter);right:var(--gutter);width:auto;max-width:none;padding:13px 0 0;background:var(--paper);animation:none}.structure-detail h3{font-size:25px;margin-bottom:12px}.structure-detail #part-name{margin-bottom:5px;font-size:11px}.structure-detail p{font-size:12px;line-height:1.7;margin-bottom:7px}.structure-detail small{font-size:9px}.structure-detail button{font-size:11px;margin-top:4px;min-height:35px}.product-stage.has-detail .lta-stage{inset:24% 0 43%}.product-stage.has-detail .product-introduction{opacity:0}.application-track{height:320svh}.application-opening{bottom:24%;right:var(--gutter)}.application-opening h2{font-size:40px}.application-opening p{font-size:15px;margin:25px 0}.mission-flow{inset:19% var(--gutter) auto;display:block;transform:none}.flow-title h3{font-size:37px}.flow-title>p{font-size:15px;margin-top:18px}.flow-explanation{font-size:14px;margin-top:22px}.flow-explanation strong{font-size:16px;margin:17px 0}.flow-explanation #task-boundary{font-size:11px}.flow-explanation .text-link{font-size:12px;margin-top:14px}.task-controls{bottom:66px;gap:8px}.task-controls button{font-size:11px;line-height:1.4;padding:12px 0}.task-controls button span{display:block;font-size:10px;margin:0 0 7px}.task-caption{bottom:22px;font-size:10px;line-height:1.7}.application-shade{background:linear-gradient(0deg,#11201be8,#10201b75 90%)}.system-section{padding:70px 0 50px}.section-heading{display:block;margin-bottom:30px}.section-heading h2{font-size:38px}.section-heading p{font-size:15px;margin-top:23px}.platform-tabs{gap:0;justify-content:space-between;margin-bottom:15px}.platform-tabs button{font-size:11px}.platform-image img{min-height:230px;object-fit:contain}.platform-image figcaption{font-size:10px}.platform-description{display:block;margin-top:20px}.platform-description h3{font-size:25px}.platform-description p{font-size:13px;margin-top:15px}.system-chain{gap:7px;font-size:11px;margin-top:30px;flex-wrap:wrap}.system-chain .icon{width:14px}.system-section .quiet-note{font-size:10px}.safety-section{padding:65px 0}.safety-layout{display:block}.safety-lead{font-size:17px}.safety-steps{margin-top:34px}.safety-steps>button{font-size:16px}.safety-steps>div{font-size:14px}.history-track{height:240svh}.history-stage>h2{font-size:37px;top:calc(var(--header) + 20px)}.history-body{bottom:22%;display:block}.history-body>strong{font-size:100px;display:block;margin-bottom:24px}.history-body h3{font-size:27px;margin-bottom:15px}.history-body p{font-size:14px;line-height:1.75;margin-bottom:10px}.history-body #history-meaning{font-size:12px}.history-body .text-link{font-size:12px}.history-controls{bottom:67px;gap:27px}.history-controls button{font-size:16px;padding-right:15px}.history-stage>p{font-size:10px;line-height:1.6;bottom:24px}.founder-section{padding:65px 0 50px}.founder-layout{display:flex;flex-direction:column;gap:32px}.founder-copy h2{font-size:36px;margin-bottom:31px}.founder-copy h3{font-size:29px}.founder-lead{font-size:17px;line-height:1.8;margin:25px 0 20px}.founder-copy>p:last-child{font-size:14px}.founder-layout figure img{height:auto;aspect-ratio:1;object-fit:cover}.founder-layout figure figcaption{font-size:10px}.team-story{display:block;margin-top:39px;padding-top:30px}.team-story h3{font-size:30px;margin-bottom:26px}.team-story p{font-size:14px}.contact-section{padding:60px 0}.contact-section .wrap{display:block}.contact-section h2{font-size:33px;margin-bottom:30px}.contact-email{display:block;margin-top:18px;font-size:12px}footer>.wrap{flex-wrap:wrap;gap:15px}footer details{width:100%;max-width:none}.menu-body{display:flex;flex-direction:column;align-items:stretch;gap:20px;min-height:0;padding-top:15px;padding-bottom:22px}.menu-links nav a{font-size:32px;padding:10px 0;gap:21px;min-height:59px}.menu-links nav a span{font-size:10px}.menu-secondary{margin-top:17px;gap:28px}.menu-secondary a{font-size:12px}.menu-preview{display:grid;grid-template-columns:1.2fr 1fr;align-items:center;gap:18px}.menu-media{aspect-ratio:1.45}.menu-preview>p{margin-top:0;font-size:11px}.menu-foot{font-size:9px;gap:20px;padding-bottom:20px}.menu-links,.menu-preview{transform:translateY(8px)}#film-dialog{width:95vw;padding:15px}.film-top h2{font-size:17px}}
@media(max-height:740px) and (min-width:701px){.product-heading h2{font-size:45px}.product-heading p{font-size:19px}.product-stage{padding-top:calc(var(--header) + 8px)}.product-introduction{top:calc(var(--header) + 110px)}.structure-detail{top:35%;max-width:310px}.structure-detail h3{font-size:29px}.structure-detail p{font-size:13px}.history-stage>h2{top:calc(var(--header) + 10px);font-size:43px}.history-body{bottom:21%}.history-body>strong{font-size:145px}.menu-links nav a{padding-block:10px}}
html.reduced-preview{scroll-behavior:auto}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}}
.reduced-preview *,.reduced-preview *::before,.reduced-preview *::after{animation:none!important;transition:none!important}
@media print{.site-header,.visual-menu,#film-dialog,.product-tools{display:none}.scroll-track{height:auto}.pinned{position:relative;min-height:850px}.intro-stage{--mission-opacity:0;--hero-opacity:1}.application-stage{--flow-opacity:0}}

.structure-node[hidden]{display:none}

/* v0.5.2 — review notes: internal source/authorization notes only show with ?review=1 */
html:not(.review) .review-note{display:none!important}
html.review .review-note{color:#b0412f}
html.review .review-note::before{content:'评审 ';font-weight:600}
html.review span.review-note::before,html.review a.review-note::before,html.review details.review-note::before{content:none}

/* v0.5.2 — header over solid dark sections (技术体系、创始人) gets its own surface so the logo never sits on body copy */
.site-header.on-ink{background:rgba(37,40,38,.94);color:var(--light)}

/* v0.5.2 — LTA product reveal: real airship first, 3D structure second (overflow:clip keeps the sticky stage working) */
.lta-reveal{background:var(--paper);overflow:clip}
.lta-tech{list-style:none;margin:clamp(10px,2vw,30px) 0 0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(22px,3vw,48px)}
.lta-tech li{border-top:1px solid #c9cec3;padding-top:22px}
.lta-tech h3{font-size:clamp(19px,1.5vw,23px);letter-spacing:-.01em;display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.lta-tech h3 small{font-size:12px;font-weight:500;color:var(--red);letter-spacing:0}
.lta-tech p{font-size:15px;line-height:1.85;color:var(--muted);margin-top:12px}
.lta-review{margin-top:24px;font-size:12px;line-height:1.7}

/* v0.5.2 — technology pillars: photos fill a fixed frame; platform screens stay uncropped */
.platform-image img,.platform-image video{display:block;width:100%;aspect-ratio:16/9;object-fit:cover;max-height:none;background:#171d19}
.platform-image img[hidden],.platform-image video[hidden]{display:none}
.platform-image img.is-screen{object-fit:contain}
.platform-image img.is-pod{object-position:center 42%}

/* v0.5.2 — back to top */
.back-top{display:inline-flex;align-items:center;gap:12px;min-height:44px;padding:0 20px;border:1px solid #c9cec3;border-radius:30px;font-size:13px;color:var(--ink);white-space:nowrap;transition:border-color .2s,transform .2s}
.back-top:hover{border-color:var(--red);transform:translateY(-2px)}
.back-top .icon{width:18px;height:18px}
.system-review{margin-top:30px;font-size:12px;line-height:1.7}

/* v0.5.2 round 3 — Zipline-informed pass: heavier display type, real footage, inset rounded media */
:root{--dark:#1e201f;--radius-media:14px}
h1,h2{font-weight:800;letter-spacing:-.045em;line-height:1.06}
h1{font-size:clamp(54px,7.4vw,120px)}
.hero-copy p,.mission-copy p{font-weight:500}
.intro-media video{width:100%;height:100%;object-fit:cover;display:block}
.intro-shade{background:linear-gradient(90deg,rgba(10,18,20,.5),rgba(10,18,20,0) 70%),linear-gradient(0deg,rgba(8,14,16,.42),transparent 55%)}
.mission-copy h2{font-size:clamp(44px,5.6vw,92px)}
.platform-image{border-radius:var(--radius-media);overflow:hidden;position:relative;background:#141615}
.platform-image figcaption{position:absolute;left:16px;bottom:12px;padding:0;background:none;color:#ffffffd0;font-size:11px;text-shadow:0 1px 8px #0008}
.founder-layout figure img{border-radius:var(--radius-media)}
#platform-title{white-space:pre-line;flex-shrink:0}

/* v0.5.2 round 4 — LTA fly-through: the real airship crosses the giant title and settles beneath it */
.lta-reveal{padding:56px 0 72px}
/* Photo→3D in one pinned stage (see ltaFrame in experience.js) */
.product-track{height:460svh}
.lta-fly-layer{position:absolute;inset:0;z-index:4;pointer-events:none}
.lta-stage{opacity:var(--hand,1)}
.lta-glow{position:absolute;left:50%;top:63%;width:76vw;height:50svh;transform:translate(-50%,-50%);background:radial-gradient(closest-side,var(--paper) 40%,rgba(244,244,240,0));opacity:0;z-index:3}
.product-heading{opacity:calc(var(--turn,1)*2 - 1);transform:translateY(calc((1 - var(--turn,1))*28px))}
.product-introduction{opacity:calc((var(--turn,1)*2 - 1)*(1 - var(--product-p,0)*2))}
.product-tools,.product-boundary{opacity:calc(var(--turn,1)*2 - 1)}
.product-stage:not(.explore) .lta-stage,.product-stage:not(.explore) .product-tools,.product-stage:not(.explore) .product-boundary{pointer-events:none}
.lta-giant{position:absolute;left:0;right:0;top:32%;opacity:calc(1 - var(--turn,0)*2);transform:translateY(calc(-50% - var(--turn,0)*14svh)) scale(calc(1 - var(--turn,0)*.3));text-align:center;font-size:min(16vw,27svh);font-weight:800;letter-spacing:-.055em;line-height:1;color:var(--ink);z-index:1;white-space:nowrap}
.lta-ship{position:absolute;left:50%;top:63%;width:min(56vw,88svh);height:auto;z-index:2;will-change:transform,opacity;transform:translate(-50%,-50%)}
.lta-shadow{position:absolute;left:50%;top:63%;width:min(46vw,72svh);height:min(5vw,8svh);transform:translate(-50%,calc(min(15vw,24svh)));border-radius:50%;background:radial-gradient(closest-side,#20252226,transparent);z-index:1}
.lta-fly-sub{position:absolute;left:0;right:0;bottom:5%;margin:auto;text-align:center;font-size:clamp(16px,1.4vw,20px);line-height:1.75;color:var(--muted);opacity:var(--fly-sub,1);transform:translateY(calc((1 - var(--fly-sub,1))*14px));z-index:3}
.lta-reveal .lta-tech{margin-top:0}


/* v0.5.2 round 11 — core technologies as big type that lights up row by row while scrolling */
.tech-section{background:var(--dark);color:white;padding:clamp(88px,13svh,150px) 0 clamp(80px,12svh,140px)}
.tech-head{font-size:clamp(26px,2.4vw,38px);font-weight:700;letter-spacing:-.02em;line-height:1.3;color:#ffffffb8;margin-bottom:clamp(40px,7svh,72px)}
.tech-rows{list-style:none;margin:0;padding:0;border-top:1px solid #ffffff1f}
.tech-row{position:relative;display:grid;grid-template-columns:1fr minmax(280px,32%);align-items:end;gap:5%;padding:clamp(22px,3.6svh,38px) 0;border-bottom:1px solid #ffffff1f}
.tech-row h3{font-size:clamp(46px,6.6vw,116px);font-weight:800;letter-spacing:-.05em;line-height:1;opacity:calc(.18 + var(--lit,1)*.82);white-space:nowrap}
.tech-row p{font-size:16px;line-height:1.75;color:#ffffffad;opacity:calc(.25 + var(--lit,1)*.75)}
.tech-row::after{content:'';position:absolute;left:0;right:0;bottom:-1px;height:2px;background:var(--red);transform:scaleX(0);transform-origin:left;transition:transform .7s cubic-bezier(.16,1,.3,1)}
.tech-row.is-current::after{transform:scaleX(1)}
.tech-review{margin-top:28px;font-size:12px;line-height:1.7}
/* the 3D floor shadow fades out at the canvas edge instead of being cut by it */
#lta-canvas{-webkit-mask-image:linear-gradient(to bottom,#000 86%,transparent 100%);mask-image:linear-gradient(to bottom,#000 86%,transparent 100%)}

/* v0.5.2 round 12 — menu preview as a full-height right half: real imagery edge to edge, caption on the image */
.visual-menu{overflow-x:hidden}
.visual-menu .menu-body{grid-template-columns:1fr;padding-right:calc(50% + var(--gutter))}
.menu-top,.menu-links,.menu-foot{position:relative;z-index:2}
.menu-preview{position:absolute;top:0;right:0;bottom:0;width:50%;z-index:1}
.menu-media{position:absolute;inset:0;aspect-ratio:auto;background:#151716;overflow:hidden}
.menu-media::after{content:'';position:absolute;inset:0;z-index:1;pointer-events:none;background:linear-gradient(0deg,rgba(10,12,11,.7),rgba(10,12,11,0) 42%),linear-gradient(180deg,rgba(10,12,11,.45),rgba(10,12,11,0) 22%),linear-gradient(90deg,rgba(30,32,31,.55),rgba(30,32,31,0) 18%)}
.preview-layer{transition:opacity .6s ease}
.preview-layer img{width:100%;height:100%;object-fit:cover;transform:scale(1.07);transition:transform 1.8s cubic-bezier(.16,1,.3,1)}
.preview-layer.active img{transform:none}
/* focal points for the portrait-shaped panel */
[data-preview-layer=applications] img{object-position:45% center}
[data-preview-layer=system] img{object-position:42% center}
[data-preview-layer=safety] img{object-position:80% center}
[data-preview-layer=company] img{object-position:38% center}
.preview-layer.product-preview{background:radial-gradient(110% 85% at 55% 48%,#3d423f 0%,#202321 55%,#131514 100%)}
.product-preview img{object-fit:contain;padding:14% 9% 18%;filter:drop-shadow(0 30px 40px rgba(0,0,0,.45))}
.menu-preview>p{position:absolute;z-index:2;left:clamp(24px,3vw,52px);right:clamp(24px,3vw,52px);bottom:clamp(30px,6svh,64px);margin:0;font-size:clamp(20px,1.8vw,28px);font-weight:700;letter-spacing:-.02em;line-height:1.35;color:#fff;text-shadow:0 2px 18px rgba(0,0,0,.45)}
.menu-foot span:last-child{visibility:hidden}

/* v0.5.2 round 13 — on-site year stories (replaces links to the old website) */
.story-dialog{border:0;padding:0;width:min(920px,94vw);max-width:none;max-height:92svh;margin:auto;background:var(--paper);color:var(--ink);border-radius:var(--radius-media);overflow:auto;opacity:0;transform:translateY(18px);transition:opacity .35s ease,transform .5s cubic-bezier(.16,1,.3,1)}
.story-dialog.is-open{opacity:1;transform:none}
.story-dialog::backdrop{background:rgba(12,14,13,.72);backdrop-filter:blur(6px)}
.story-close{position:sticky;top:14px;float:right;margin:14px 14px -58px 0;z-index:3;width:44px;height:44px;border-radius:50%;background:rgba(20,22,21,.55);color:#fff;display:flex;align-items:center;justify-content:center}
.story-close:hover{background:var(--red)}
.story-hero{position:relative;margin:0;aspect-ratio:16/8;overflow:hidden;background:#1d201f}
.story-hero img{width:100%;height:100%;object-fit:cover;display:block}
.story-hero::after{content:'';position:absolute;inset:0;background:linear-gradient(0deg,rgba(12,14,13,.62),rgba(12,14,13,0) 55%)}
.story-year{position:absolute;left:clamp(24px,4vw,48px);bottom:clamp(10px,2vw,22px);z-index:1;color:#fff;font-size:clamp(64px,10vw,124px);font-weight:800;letter-spacing:-.05em;line-height:.9;font-variant-numeric:tabular-nums}
.story-text{padding:clamp(28px,4.5vw,56px) clamp(24px,6vw,84px) clamp(32px,5vw,60px)}
.story-meta{font-size:13px;color:var(--muted);letter-spacing:.02em}
.story-text h2{font-size:clamp(32px,3.6vw,52px);margin:12px 0 26px}
#story-content p{font-size:17px;line-height:1.95;margin-bottom:16px;max-width:38em}
#story-quote{margin:30px 0 8px;padding:6px 0 6px 22px;border-left:3px solid var(--red)}
#story-quote p{font-size:clamp(19px,1.8vw,23px);font-weight:600;line-height:1.7;letter-spacing:-.01em}
#story-quote cite{display:block;margin-top:12px;font-size:13px;font-style:normal;color:var(--muted)}
.story-note{margin-top:22px;font-size:12px;line-height:1.7}
.story-done{margin-top:28px}
.footer-id{display:flex;flex-direction:column;gap:6px}
.footer-legal{font-size:11px;line-height:1.7;color:#8f968d}

/* v0.5.2 round 5 — founder story: pinned stage, five chapters switched by scroll */
.founder-section{padding:0 0 80px}
.founder-track{height:420svh}
.founder-stage{display:grid;grid-template-columns:auto 1fr;gap:clamp(36px,6vw,110px);align-items:center;padding:calc(var(--header) + 28px) var(--gutter) 48px}
.founder-media{position:relative;height:calc(100svh - var(--header) - 96px);max-height:820px;width:min(42vw,calc((100svh - var(--header) - 96px)*.8),656px);border-radius:var(--radius-media);overflow:hidden;background:#141615}
.founder-media img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.05);transition:opacity .8s ease,transform 1.6s cubic-bezier(.16,1,.3,1)}
.founder-media img.active{opacity:1;transform:none}
.founder-id{font-size:15px;color:#cfd6cc;display:flex;align-items:baseline;gap:8px;flex-wrap:wrap}
.founder-id strong{font-size:22px;color:white;font-weight:700;letter-spacing:-.01em}
.founder-id span{color:#9aa39a;font-size:13px;margin-left:10px}
.founder-no{display:block;margin:clamp(28px,6svh,60px) 0 18px;font-size:12px;color:var(--red);font-variant-numeric:tabular-nums;letter-spacing:.04em}
#founder-title{font-size:clamp(40px,4.6vw,76px);white-space:pre-line}
.founder-text{font-size:18px;line-height:1.9;color:#d5dbd2;margin-top:26px;max-width:34em}
.founder-extra{margin-top:18px;font-size:14px;color:#ffffffb0;padding-left:14px;border-left:2px solid var(--red)}
.founder-note{margin-top:16px;font-size:12px;line-height:1.7}
.founder-dots{display:flex;gap:4px;margin-top:clamp(28px,6svh,56px)}
.founder-dots button{width:44px;height:44px;display:flex;align-items:center;justify-content:flex-start;padding:0}
.founder-dots span{display:block;width:26px;height:2px;background:#ffffff38;transition:background .3s,width .3s}
.founder-dots [aria-selected=true] span{background:white;width:36px}
.founder-section .team-story{margin-top:0}
#history-event{white-space:pre-line}
/* v0.5.2 round 9 — bigger type: giant odometer year, larger chapter titles */
.history-stage>h2{font-size:clamp(46px,5.6vw,96px)}
.history-body{grid-template-columns:auto 1fr;gap:6%}
.history-body>strong.odometer{font-size:clamp(120px,21vw,340px);font-weight:800;line-height:1;letter-spacing:0;display:block}
.odo{display:inline-flex;height:1em;overflow:hidden;line-height:1}
.odo-col{display:flex;flex-direction:column;transition:transform .9s cubic-bezier(.16,1,.3,1);will-change:transform}
.odo-col>span{display:block;height:1em;line-height:1;margin-right:-.06em;font-variant-numeric:tabular-nums}
.history-body h3{font-size:clamp(32px,3.4vw,54px)}
#founder-title{font-size:clamp(46px,5.4vw,92px)}
#history-source[hidden]{display:none}
.history-images img[data-year-image="0"]{filter:brightness(.68)}
.history-track{height:330svh}

/* v0.5.2 round 8 — less empty space: full-bleed real imagery for safety and contact, tighter section rhythm */
.safety-section{position:relative;isolation:isolate;min-height:100svh;display:flex;align-items:center;padding:calc(var(--header) + 40px) 0 64px;color:white;background:#121514;overflow:clip}
.safety-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:30% center;z-index:-2}
.safety-section::before{content:'';position:absolute;inset:0;z-index:-1;background:linear-gradient(90deg,rgba(12,16,15,.82) 0%,rgba(12,16,15,.55) 45%,rgba(12,16,15,.78) 100%)}
.safety-section .safety-lead{color:#e3e8e1}
.safety-steps>button{border-top-color:#ffffff40;color:white}
.safety-steps>div{color:#ffffffbd}
.contact-section{position:relative;isolation:isolate;min-height:78svh;display:flex;align-items:flex-end;padding:0 0 9svh;color:white;overflow:clip}
.contact-section{background:#151716}.contact-mark{position:absolute;right:-6vw;top:50%;width:min(62vw,880px);transform:translateY(-50%) rotate(-8deg);opacity:.12;z-index:-2;pointer-events:none;animation:mark-drift 18s ease-in-out infinite alternate}@keyframes mark-drift{to{transform:translateY(-54%) translateX(-2vw) rotate(-4deg)}}@media(prefers-reduced-motion:reduce){.contact-mark{animation:none}}
.contact-section::before{content:'';position:absolute;inset:0;z-index:-1;background:radial-gradient(60% 80% at 85% 55%,rgba(222,0,31,.22),transparent 70%),radial-gradient(50% 60% at 10% 100%,rgba(255,255,255,.05),transparent 70%)}
.contact-section h2{font-size:clamp(44px,5.6vw,92px)}
.contact-section .contact-email{color:#ffffffd0}
.system-section{padding:80px 0 60px}
.section-heading{margin-bottom:32px}
.founder-section{padding-bottom:56px}

/* Maritime delivery as a four-step sequence: steps on the left, one real clip per step on the right */
.application-track{height:380svh;background:var(--dark);color:white}
.application-stage{display:grid;grid-template-columns:minmax(300px,.78fr) 1.5fr;gap:clamp(32px,5vw,96px);align-items:center;padding:calc(var(--header) + 20px) var(--gutter) 40px}
.steps-copy h2{font-size:clamp(40px,4.4vw,72px)}
.steps-lead{font-size:18px;color:#cdd3cb;margin:22px 0 34px}
.steps{border-top:1px solid #ffffff24}
.steps>button{display:grid;grid-template-columns:46px 1fr;align-items:baseline;width:100%;text-align:left;padding:17px 0;border-bottom:1px solid #ffffff24;color:#ffffff6b;transition:color .35s}
.steps>button:hover{color:#ffffffb0}
.step-no{font-size:12px;font-variant-numeric:tabular-nums;transition:color .35s}
.step-name{font-size:clamp(19px,1.55vw,24px);font-weight:700;letter-spacing:-.02em}
.step-text{grid-column:2;font-size:15px;line-height:1.7;max-height:0;opacity:0;overflow:hidden;transition:max-height .45s cubic-bezier(.16,1,.3,1),opacity .35s,margin .35s}
.steps>button[aria-selected=true]{color:white}
.steps>button[aria-selected=true] .step-no{color:var(--red)}
.steps>button[aria-selected=true] .step-text{max-height:64px;opacity:.75;margin-top:6px}
.steps-copy .text-link{margin-top:30px;color:white}
.step-media{position:relative;aspect-ratio:16/9;border-radius:var(--radius-media);overflow:hidden;background:#111;width:100%;max-height:calc(100svh - var(--header) - 80px);justify-self:center}
.step-media video{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.03);transition:opacity .7s ease,transform 1.2s cubic-bezier(.16,1,.3,1)}
.step-media video.active{opacity:1;transform:none}
.step-caption{position:absolute;left:16px;right:16px;bottom:12px;font-size:11px;line-height:1.6;color:#ffffffd0;text-shadow:0 1px 8px #0008;z-index:2}
html.review .step-caption .review-note{color:#ffb4a6}

@media(max-width:1000px){.lta-tech{grid-template-columns:1fr 1fr;row-gap:34px}.application-stage{grid-template-columns:1fr 1.25fr;gap:32px}.steps-lead{display:none}.steps-copy h2{margin-bottom:28px}}
@media(max-width:700px){.story-dialog{width:100vw;max-height:100svh;height:100svh;border-radius:0}.story-hero{aspect-ratio:4/3}#story-content p{font-size:15px;line-height:1.85}.visual-menu .menu-body{padding-right:var(--gutter)}.menu-preview{position:relative;inset:auto;width:auto;height:32svh;display:block;border-radius:var(--radius-media);overflow:hidden}.menu-media{position:absolute;inset:0;aspect-ratio:auto}.menu-preview>p{font-size:16px;left:16px;right:16px;bottom:14px}.menu-foot span:last-child{visibility:visible}.tech-section{padding:64px 0 60px}.tech-head{font-size:22px;margin-bottom:28px}.tech-row{display:block;padding:20px 0}.tech-row h3{font-size:clamp(34px,11vw,48px)}.tech-row p{font-size:14px;margin-top:10px}.history-body>strong.odometer{font-size:27vw;margin-bottom:18px}.history-stage>h2{font-size:38px}.history-track{height:360svh}.history-controls{gap:14px}.history-controls button{font-size:15px;padding-right:6px}.founder-track{height:440svh}.founder-stage{display:flex;flex-direction:column;justify-content:center;align-items:stretch;gap:18px;padding:calc(var(--header) + 10px) var(--gutter) 22px}.founder-media{height:36svh;width:100%}.founder-id strong{font-size:18px}.founder-no{margin:6px 0 8px}#founder-title{font-size:32px}.founder-text{font-size:14px;line-height:1.8;margin-top:12px}.founder-extra{font-size:12px;margin-top:12px}.founder-dots{margin-top:10px}.product-track{height:420svh}.contact-section{min-height:72svh}.contact-section h2{font-size:34px}.safety-section{min-height:auto}.lta-giant{font-size:19vw;top:30%}.lta-ship{width:92vw;top:58%}.lta-shadow{width:76vw;top:58%;transform:translate(-50%,24vw)}.lta-fly-sub{bottom:9%;font-size:15px}h1{font-size:clamp(44px,12vw,60px)}.application-track{height:400svh}.application-stage{display:flex;flex-direction:column;justify-content:center;gap:22px;padding:calc(var(--header) + 12px) var(--gutter) 28px}.step-media{order:-1;aspect-ratio:4/3;max-height:none}.steps-copy h2{font-size:32px}.steps>button{padding:12px 0;grid-template-columns:36px 1fr}.step-name{font-size:17px}.step-text{font-size:13px}.steps-copy .text-link{margin-top:18px;font-size:13px}}
@media(max-width:700px){.lta-reveal{padding:48px 0 64px}.lta-tech{grid-template-columns:1fr;row-gap:0}.lta-tech li{padding:18px 0 20px}.lta-tech p{font-size:14px;margin-top:8px}.platform-image img,.platform-image video{aspect-ratio:4/3}footer .back-top{margin-left:auto}}
.lta-failed #lta-load-status{bottom:70px;right:var(--gutter);max-width:580px;color:var(--ink);line-height:1.8}
.lta-failed .product-tools>span,.lta-failed .product-tools button:not(#lta-retry){display:none}
.lta-failed .product-tools>div{margin-left:auto}

/* ===== v0.6 · 认识低空具身智能 + 三大板块 ===== */
.eyebrow{font-size:13px;font-weight:700;letter-spacing:.18em;color:var(--red);margin-bottom:18px}
.concept-section{background:var(--dark);color:#fff;padding:clamp(110px,16svh,180px) 0 clamp(90px,13svh,150px)}
.concept-formula{font-size:clamp(52px,8vw,150px);line-height:1}
.concept-formula .f-eq{display:block;margin-top:.32em;font-size:.36em;letter-spacing:-.02em;line-height:1.3;color:#ffffffe0}
.concept-formula .f-eq b{color:var(--red);font-weight:500;margin:0 .35em}
.concept-formula .f-eq b:first-child{margin-left:0}
.concept-lead{margin-top:clamp(24px,4svh,40px);font-size:clamp(16px,1.25vw,20px);line-height:1.8;color:#ffffffb0;max-width:42em}
.concept-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2.2vw,36px);margin-top:clamp(48px,8svh,96px)}
.concept-card{display:flex;flex-direction:column;color:inherit;text-decoration:none;border-top:1px solid #ffffff2e;padding-top:22px}
.concept-card figure{order:-1;margin:0 0 22px;border-radius:var(--radius-media);overflow:hidden;aspect-ratio:4/3;background:#141615}
.concept-card figure img{width:100%;height:100%;object-fit:cover;transition:transform 1.1s cubic-bezier(.16,1,.3,1),filter .6s}
.concept-card:hover figure img,.concept-card:focus-visible figure img{transform:scale(1.045);filter:brightness(1.08)}
.card-no{font-size:13px;font-weight:700;letter-spacing:.16em;color:var(--red)}
.concept-card h3{font-size:clamp(34px,3.4vw,58px);font-weight:800;letter-spacing:-.045em;line-height:1.05;margin:8px 0 14px}
.concept-card p{font-size:16px;line-height:1.75;color:#ffffffc4}
.card-go{margin-top:auto;padding-top:22px;display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:700}
.card-go .icon{transition:transform .4s cubic-bezier(.16,1,.3,1)}
.concept-card:hover .card-go .icon{transform:translateX(6px)}
.chapter-head{background:var(--dark);color:#fff;padding:clamp(90px,15svh,170px) 0 clamp(50px,9svh,96px);border-top:1px solid #ffffff14}
.chapter-no{font-size:13px;font-weight:700;letter-spacing:.2em;color:var(--red)}
.chapter-head h2{font-size:clamp(72px,11vw,200px);margin:.12em 0 .18em}
.chapter-head p:last-child,.chapter-inline p:last-child{font-size:clamp(17px,1.45vw,23px);line-height:1.7;color:#ffffffb8;max-width:38em}
.chapter-inline h2{font-size:clamp(64px,9vw,160px);margin:.12em 0 .2em}
.more-section{background:var(--dark);color:#fff;padding:clamp(90px,14svh,160px) 0}
.more-head{display:grid;grid-template-columns:1fr minmax(280px,34%);gap:5%;align-items:end;margin-bottom:clamp(36px,6svh,64px)}
.more-head h2{font-size:clamp(46px,5.4vw,92px)}
.more-head p{font-size:16px;line-height:1.75;color:#ffffffad}
.product-cards{display:grid;gap:clamp(18px,2vw,32px)}
.product-cards.two{grid-template-columns:repeat(2,1fr)}
.product-cards.four{grid-template-columns:repeat(4,1fr)}
.product-card{display:flex;flex-direction:column}
.product-card figure{margin:0 0 20px;border-radius:var(--radius-media);overflow:hidden;aspect-ratio:4/5;background:#e7e8e2}
.product-cards.two .product-card figure{aspect-ratio:16/10}
.product-card figure.on-black{background:#000}
.product-card figure img{width:100%;height:100%;object-fit:cover}
.product-card figure.on-black img{object-fit:contain}
.product-card h3{font-size:clamp(22px,1.9vw,32px);font-weight:800;letter-spacing:-.03em;line-height:1.2}
.product-card p{margin-top:10px;font-size:15px;line-height:1.75;opacity:.78}
.tags{list-style:none;margin:16px 0 0;padding:0;display:flex;flex-wrap:wrap;gap:8px}
.tags li{font-size:12.5px;line-height:1;padding:8px 12px;border-radius:99px;border:1px solid currentColor;opacity:.72}
.sensing-section{background:var(--paper);color:var(--ink);padding:clamp(100px,15svh,170px) 0 clamp(90px,13svh,150px)}
.sensing-section .chapter-inline p:last-child{color:var(--muted)}
.sensing-section .chapter-inline{margin-bottom:clamp(40px,7svh,80px)}
.case-band{position:relative;margin:clamp(56px,9svh,110px) 0 0;border-radius:var(--radius-media);overflow:hidden;background:#141615}
.case-band video{display:block;width:100%;aspect-ratio:21/9;object-fit:cover}
.case-band.wide video{aspect-ratio:5/2}
.case-band figcaption{position:absolute;left:0;right:0;bottom:0;padding:48px 24px 18px;background:linear-gradient(0deg,#000a,#0000);color:#fff;font-size:15px;line-height:1.6}
.case-band figcaption>span:first-child{display:inline-block;margin-right:12px;font-size:12px;font-weight:700;letter-spacing:.16em;color:#ff4d5e}
.command-section{background:var(--dark);color:#fff;padding:clamp(100px,15svh,170px) 0 clamp(80px,12svh,140px)}
.command-section .case-band{margin-top:clamp(36px,6svh,70px)}
.command-foot{display:flex;justify-content:space-between;align-items:center;gap:24px;flex-wrap:wrap;margin-top:24px}
.command-foot .tags{margin:0}
#task-film{display:block;width:100%;max-height:78svh;background:#000}
[data-reveal]{opacity:0;transform:translateY(28px);transition:opacity .9s cubic-bezier(.16,1,.3,1) var(--d,0ms),transform .9s cubic-bezier(.16,1,.3,1) var(--d,0ms)}
[data-reveal].is-in{opacity:1;transform:none}
.reduced-preview [data-reveal],.no-js [data-reveal]{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){[data-reveal]{opacity:1;transform:none}}
@media(max-width:1100px){.product-cards.four{grid-template-columns:repeat(2,1fr)}}
@media(max-width:800px){.concept-grid{grid-template-columns:1fr}.concept-card figure{aspect-ratio:16/9}.more-head{grid-template-columns:1fr;gap:16px}.product-cards.two{grid-template-columns:1fr}.case-band video,.case-band.wide video{aspect-ratio:4/3}.case-band figcaption{font-size:13px;padding:36px 16px 14px}}
@media(max-width:520px){.product-cards.four{grid-template-columns:1fr}.product-card figure{aspect-ratio:4/3}}

/* v0.6 · 公司历程与王洋博士合并为一条时间线 */
.history-track{height:470svh}
.history-tag{display:inline-flex;align-items:center;gap:8px;margin-bottom:14px;font-size:13px;font-weight:700;letter-spacing:.14em;color:#ffffffb0}
.history-tag::before{content:'';width:18px;height:2px;background:currentColor}
.history-tag.is-person{color:#ff5a68}
.history-controls{overflow-x:auto;scrollbar-width:none}
.history-controls::-webkit-scrollbar{display:none}
.history-controls button{flex:none}
.founder-card{background:var(--dark);color:#fff;padding:clamp(90px,14svh,160px) 0}
.founder-card-grid{display:grid;grid-template-columns:minmax(0,5fr) minmax(0,7fr);gap:clamp(32px,6vw,110px);align-items:center}
.founder-card figure{margin:0;border-radius:var(--radius-media);overflow:hidden;aspect-ratio:4/5;background:#141615}
.founder-card figure img{width:100%;height:100%;object-fit:cover}
.founder-card h2{font-size:clamp(52px,6.4vw,110px)}
.founder-card h2 span{font-size:.42em;font-weight:700;letter-spacing:0;color:#ffffffb0;margin-left:.2em}
.founder-role{margin-top:18px;font-size:15px;line-height:1.8;color:#ffffffa8}
.founder-card blockquote{margin:clamp(28px,5svh,48px) 0;padding-left:22px;border-left:3px solid var(--red);font-size:clamp(20px,1.9vw,30px);font-weight:700;line-height:1.5;letter-spacing:-.01em}
.founder-facts{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:1fr 1fr;gap:0 28px;border-top:1px solid #ffffff1f}
.founder-facts li{padding:14px 0;border-bottom:1px solid #ffffff1f;font-size:15px;color:#ffffffd0}
@media(max-width:1000px){.history-track{height:500svh}}
@media(max-width:800px){.founder-card-grid{grid-template-columns:1fr}.founder-card figure{aspect-ratio:4/3}.founder-facts{grid-template-columns:1fr}}
@media(max-width:700px){.history-track{height:520svh}}.history-images img[data-year-image="0"]{filter:brightness(.6)}.history-images img[data-year-image="2"]{filter:brightness(.42) saturate(.8)}.history-images img[data-year-image="1"],.history-images img[data-year-image="6"]{filter:brightness(.62)}

/* v0.6 · 菜单重做：全屏大字导航（参考 Zipline 全屏大字＋细分隔线，Apple 悬停聚焦与逐行进场） */
.visual-menu{background:#131514;color:#fff;display:flex;flex-direction:column;overflow-y:auto;overflow-x:hidden;opacity:1;clip-path:inset(0 0 100% 0);transition:clip-path .62s cubic-bezier(.76,0,.24,1)}
.visual-menu:not([open]){display:none}
.visual-menu::backdrop{background:transparent}
.visual-menu.is-open{clip-path:inset(0 0 0 0)}
.visual-menu.is-closing{clip-path:inset(0 0 100% 0);opacity:1;transition:clip-path .22s cubic-bezier(.4,0,1,1)}
.nav-top{flex:none;height:var(--header);padding:0 var(--gutter);display:flex;align-items:center;justify-content:space-between}
.nav-logo img{height:34px;width:auto}
.nav-actions{display:flex;align-items:center;gap:12px}
.nav-pill{display:inline-flex;align-items:center;min-height:42px;padding:0 20px;border:1px solid #ffffff59;border-radius:99px;font-size:14px;font-weight:700;transition:background .25s,color .25s}
.nav-pill:hover{background:#fff;color:#131514}
.nav-close{width:42px;height:42px;display:grid;place-items:center;border:1px solid #ffffff59;border-radius:50%;transition:background .25s,color .25s,transform .4s cubic-bezier(.16,1,.3,1)}
.nav-close:hover{background:#fff;color:#131514;transform:rotate(90deg)}
.nav-list{flex:1;display:flex;flex-direction:column;justify-content:center;padding:clamp(16px,4svh,48px) var(--gutter)}
.nav-list a{--thumb:clamp(150px,13vw,230px);position:relative;display:grid;grid-template-columns:clamp(44px,5vw,84px) auto 1fr;align-items:center;gap:0 clamp(16px,2vw,32px);padding:clamp(8px,1.6svh,18px) 0;border-top:1px solid #ffffff1c;color:#fff;opacity:0;transform:translateY(40%);transition:opacity .5s ease,transform .7s cubic-bezier(.16,1,.3,1),color .3s}
.nav-list a:last-child{border-bottom:1px solid #ffffff1c}
.visual-menu.is-open .nav-list a{opacity:1;transform:none;transition-delay:calc(.18s + var(--i)*.06s),calc(.18s + var(--i)*.06s),0s}
.visual-menu.is-closing .nav-list a{transition-delay:0s;transition-duration:.15s}
.nav-no{font-size:13px;font-weight:700;letter-spacing:.14em;color:#ffffff66;transition:color .3s}
.nav-label{font-size:clamp(40px,6.2vw,108px);font-weight:800;letter-spacing:-.05em;line-height:1.08;transition:color .3s,transform .5s cubic-bezier(.16,1,.3,1)}
.nav-desc{justify-self:end;font-size:15px;color:#ffffff8c;text-align:right;transition:transform .55s cubic-bezier(.16,1,.3,1),color .3s}
.nav-thumb{position:absolute;right:0;top:50%;width:var(--thumb);aspect-ratio:16/10;object-fit:cover;border-radius:10px;transform:translateY(-50%) scale(.92);clip-path:inset(0 0 0 100% round 10px);transition:clip-path .55s cubic-bezier(.16,1,.3,1),transform .55s cubic-bezier(.16,1,.3,1);pointer-events:none}
.nav-list:hover a,.nav-list:focus-within a{color:#ffffff47}
.nav-list a:hover,.nav-list a:focus-visible{color:#fff}
.nav-list a:hover .nav-label,.nav-list a:focus-visible .nav-label{transform:translateX(12px)}
.nav-list a:hover .nav-desc,.nav-list a:focus-visible .nav-desc{transform:translateX(calc(-1 * var(--thumb) - 28px));color:#ffffffd9}
.nav-list a:hover .nav-thumb,.nav-list a:focus-visible .nav-thumb{clip-path:inset(0 0 0 0 round 10px);transform:translateY(-50%) scale(1)}
.nav-list a.is-current .nav-no{color:var(--red)}
.nav-list a.is-current .nav-no::after{content:'';display:inline-block;width:6px;height:6px;margin-left:8px;border-radius:50%;background:var(--red);vertical-align:middle}
.nav-foot{flex:none;display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap;padding:20px var(--gutter) 28px;opacity:0;transition:opacity .5s .5s}
.visual-menu.is-open .nav-foot{opacity:1}
.nav-secondary{display:flex;gap:28px;flex-wrap:wrap}
.nav-secondary a,.nav-mail{font-size:14px;color:#ffffffa6;min-height:40px;display:inline-flex;align-items:center;transition:color .25s}
.nav-secondary a:hover,.nav-mail:hover{color:#fff}
@media(max-width:800px){.nav-list a{grid-template-columns:36px 1fr;row-gap:4px}.nav-desc{grid-column:2;justify-self:start;text-align:left;font-size:13px}.nav-thumb{display:none}.nav-list a:hover .nav-desc,.nav-list a:focus-visible .nav-desc{transform:none}.nav-label{font-size:clamp(34px,10vw,56px)}.nav-pill{display:none}.nav-foot{flex-direction:column;align-items:flex-start;gap:4px}}
@media(prefers-reduced-motion:reduce){.visual-menu,.visual-menu.is-closing{transition:none}.nav-list a{opacity:1;transform:none}}@media(hover:none){.nav-list:hover a,.nav-list:focus-within a{color:#fff}.nav-list a:hover .nav-label{transform:none}}
.product-card figure.on-navy{background:#0b1b36}
.hero-pair .product-card figure{aspect-ratio:4/5}
.hero-pair .product-card h3{font-size:clamp(26px,2.4vw,40px)}
.hero-pair .product-card>p:not(.card-kicker){font-size:16px;max-width:34em}
.card-kicker{margin:0 0 8px;font-size:12px;font-weight:700;letter-spacing:.14em;color:var(--red)}
.product-cards.three{grid-template-columns:repeat(3,1fr);margin-top:clamp(48px,8svh,88px);padding-top:clamp(28px,4svh,44px);border-top:1px solid #2426251f}
.product-cards.compact .product-card figure{aspect-ratio:16/10;margin-bottom:16px}
.product-cards.compact .product-card h3{font-size:clamp(19px,1.5vw,24px)}
.product-cards.compact .product-card p{font-size:14px}
@media(max-width:800px){.product-cards.three{grid-template-columns:1fr}.hero-pair .product-card figure{aspect-ratio:1/1}}.product-cards.two.hero-pair .product-card figure{aspect-ratio:4/5;max-height:78svh}.product-cards.two.hero-pair .product-card figure img{object-position:center 30%}
@media(max-width:800px){.product-cards.two.hero-pair .product-card figure{aspect-ratio:4/5}}
.hero-copy .button{margin-top:clamp(28px,4.5svh,48px)}

/* v0.6 · 四项技术：编号＋悬停放大聚焦 */
.tech-rows{counter-reset:tech}
.tech-row{counter-increment:tech}
.tech-row h3::before{content:counter(tech,decimal-leading-zero);display:inline-block;vertical-align:top;margin:.55em .7em 0 0;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--red)}
@media(hover:hover){
.tech-row{cursor:default}
.tech-row h3{transform-origin:left center;transition:transform .65s cubic-bezier(.16,1,.3,1),opacity .35s}
.tech-row p{transition:opacity .35s,color .35s,transform .65s cubic-bezier(.16,1,.3,1)}
.tech-rows:hover .tech-row h3{opacity:.2}
.tech-rows:hover .tech-row p{opacity:.3}
.tech-rows .tech-row:hover h3{opacity:1;transform:scale(1.1)}
.tech-rows .tech-row:hover p{opacity:1;color:#fff;transform:translateX(-10px)}
.tech-rows:hover .tech-row.is-current::after{transform:scaleX(0)}
.tech-rows .tech-row:hover::after{transform:scaleX(1)}
}
/* v0.6 · 四项技术并入 3D 建模页（左侧列表，与模型联动） */
.lta-nodes,.structure-detail{display:none!important}
.product-heading .eyebrow{margin-bottom:10px}
.tech-dock{position:absolute;left:var(--gutter);top:34%;width:min(31%,400px);margin:0;padding:0;list-style:none;z-index:4;opacity:0;transform:translateX(-16px);pointer-events:none;transition:opacity .5s,transform .7s cubic-bezier(.16,1,.3,1)}
.product-stage.explore .tech-dock{opacity:1;transform:none;pointer-events:auto}
.tech-dock li{border-top:1px solid #24262522}
.tech-dock li:last-child{border-bottom:1px solid #24262522}
.tech-dock button{position:relative;display:grid;grid-template-columns:40px 1fr;align-items:baseline;width:100%;padding:14px 0 14px 14px;text-align:left;color:#24262566;transition:color .3s}
.tech-dock button::before{content:'';position:absolute;left:0;top:14px;bottom:14px;width:3px;background:var(--red);transform:scaleY(0);transform-origin:top;transition:transform .5s cubic-bezier(.16,1,.3,1)}
.td-no{font-size:12px;font-weight:700;letter-spacing:.14em}
.td-name{font-size:clamp(22px,2.1vw,34px);font-weight:800;letter-spacing:-.04em;line-height:1.15;transform-origin:left center;transition:transform .55s cubic-bezier(.16,1,.3,1)}
.td-lead{grid-column:2;max-height:0;overflow:hidden;opacity:0;font-size:14px;line-height:1.7;color:var(--muted);transition:max-height .5s cubic-bezier(.16,1,.3,1),opacity .4s,margin .4s}
.tech-dock li.is-active button{color:var(--ink)}
.tech-dock li.is-active button::before{transform:scaleY(1)}
.tech-dock li.is-active .td-no{color:var(--red)}
.tech-dock li.is-active .td-name{transform:scale(1.06)}
.tech-dock li.is-active .td-lead{max-height:80px;opacity:1;margin-top:8px}
@media(hover:hover){.tech-dock button:hover{color:var(--ink)}}
@media(max-width:1000px){.tech-dock{top:auto;bottom:118px;width:min(46%,380px)}}
@media(max-width:700px){.tech-dock{left:var(--gutter);right:var(--gutter);width:auto;bottom:92px;background:var(--paper)}.tech-dock li{display:none;border:0}.tech-dock li.is-active{display:block}.td-name{font-size:24px}.tech-dock li.is-active .td-name{transform:none}}.product-introduction{display:none}
@media(min-width:1001px){.product-stage.explore .lta-stage{transform:translateX(11%);transition:transform .8s cubic-bezier(.16,1,.3,1)}}

/* v0.6 · 缩短页面：压缩滚动段落，安全理念并入指挥调度 */
.product-track{height:430svh}
.application-track{height:280svh}
.history-track{height:360svh}
@media(max-width:1000px){.history-track{height:400svh}.application-track{height:320svh}}
@media(max-width:700px){.history-track{height:420svh}.product-track{height:400svh}}
@media(min-width:1001px){.product-stage.explore .lta-stage{transform:translate(11%,5%)}}
.command-principles{display:grid;grid-template-columns:minmax(0,4fr) minmax(0,8fr);gap:clamp(28px,5vw,90px);margin-top:clamp(56px,9svh,110px);padding-top:clamp(28px,4svh,44px);border-top:1px solid #ffffff1f}
.command-principles h3{font-size:clamp(34px,3.6vw,60px);font-weight:800;letter-spacing:-.045em;line-height:1.08}
.command-principles>div>p{margin-top:16px;font-size:16px;color:#ffffffad}
.command-principles ol{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:clamp(18px,2vw,32px)}
.command-principles li{border-top:2px solid var(--red);padding-top:16px}
.command-principles li span{font-size:12px;font-weight:700;letter-spacing:.14em;color:#ff5a68}
.command-principles li b{display:block;margin:8px 0 8px;font-size:clamp(18px,1.5vw,22px)}
.command-principles li p{font-size:14px;line-height:1.75;color:#ffffffad}
@media(max-width:800px){.command-principles,.command-principles ol{grid-template-columns:1fr}}.intro-track{height:165svh}.product-track{height:400svh}.history-track{height:320svh}

/* v0.6 · 四项技术的 3D 演示标注 */
.fx-labels{position:absolute;inset:0;pointer-events:none;z-index:3;overflow:hidden}
.fx-label{position:absolute;left:0;top:0;padding:5px 10px;border-radius:4px;background:var(--red);color:#fff;font-size:12px;font-weight:700;letter-spacing:.02em;white-space:nowrap;opacity:0;transition:opacity .35s}
.fx-label.on{opacity:1}
.fx-label.wp{background:var(--ink)}
.fx-label.chip{left:auto;right:6%;top:24%;transform:none;background:transparent;color:var(--red);border:1px solid var(--red);font-size:11px;letter-spacing:.12em}
@media(max-width:700px){.fx-label.chip{top:16%;right:4%}}.fx-label.chip{right:auto;left:50%;top:auto;bottom:16%;transform:translateX(-50%)}
@media(min-width:1001px){.fx-label.chip{left:44%}}
@media(max-width:1000px){.tech-dock{left:var(--gutter);right:var(--gutter);width:auto;top:auto;bottom:96px;background:var(--paper)}.tech-dock li{display:none;border:0}.tech-dock li.is-active{display:block}.tech-dock li.is-active .td-name{transform:none}.fx-label.chip{bottom:auto;top:20%}}
@media(max-width:700px){.fx-label{font-size:10.5px;padding:3px 7px}.fx-label.chip{top:13%}}
.fx-label.chip{left:auto;right:4%;top:22%;bottom:auto;transform:none;background:#f4f4f0e6}

/* v0.6 · 不止浮空器：智驾仪示意图＋海事实拍视频 */
.diagram-figure{background:radial-gradient(120% 90% at 50% 50%,#2a2e2c 0%,#151716 70%)!important;display:grid;place-items:center}
.autopilot-diagram{width:100%;height:100%;overflow:visible}
.autopilot-diagram .chip rect{fill:#1d2021;stroke:var(--red);stroke-width:2}
.autopilot-diagram .chip path{stroke:#ffffff66;stroke-width:2;fill:none}
.autopilot-diagram .chip text{fill:#fff;font-size:15px;font-weight:800;text-anchor:middle}
.autopilot-diagram .chip .chip-sub{fill:#ffffff80;font-size:7px;font-weight:700;letter-spacing:.18em}
.autopilot-diagram .chip rect{filter:drop-shadow(0 0 10px rgba(222,0,31,.45))}
.af-link{stroke:#ffffff26;stroke-width:1.5;fill:none;stroke-dasharray:4 5}
.af-shape *{fill:none;stroke:#ffffff8c;stroke-width:2.2;stroke-linejoin:round;stroke-linecap:round}
.af text{fill:#ffffffa6;font-size:13px;font-weight:700;text-anchor:middle}
.af{animation:af-on 6.4s infinite}
.af-1{animation-delay:1.6s}.af-2{animation-delay:3.2s}.af-3{animation-delay:4.8s}
.af .af-link,.af .af-shape *,.af text{transition:stroke .3s,fill .3s}
@keyframes af-on{0%,22%{--on:1}25%,100%{--on:0}}
.af{--on:0}
@property --on{syntax:'<number>';inherits:true;initial-value:0}
.af .af-shape *{stroke:color-mix(in srgb,var(--red) calc(var(--on)*100%),#ffffff8c)}
.af text{fill:color-mix(in srgb,#fff calc(var(--on)*100%),#ffffffa6)}
.af .af-link{stroke:color-mix(in srgb,var(--red) calc(var(--on)*100%),#ffffff26);stroke-dashoffset:calc(var(--on)*-40px)}
.af .af-link{animation:af-flow 1s linear infinite}
@keyframes af-flow{to{stroke-dashoffset:-18}}
.video-figure{position:relative}
.video-figure video{width:100%;height:100%;object-fit:cover;display:block}
.figure-tag{position:absolute;left:14px;bottom:12px;padding:5px 10px;border-radius:99px;background:#000a;color:#fff;font-size:12px;font-weight:700;letter-spacing:.06em;backdrop-filter:blur(6px)}
@media(prefers-reduced-motion:reduce){.af{--on:1;animation:none}.af .af-link{animation:none}}
/* v0.6 · 收紧篇幅（约 20 屏 → 14 屏） */
.intro-track{height:100svh}
.product-track{height:340svh}
.history-track{height:240svh}
@media(max-width:1000px){.history-track{height:270svh}.product-track{height:350svh}}
@media(max-width:700px){.history-track{height:290svh}.product-track{height:360svh}}
.concept-section,.more-section,.sensing-section,.command-section,.founder-card,.steps-section{padding-top:clamp(64px,10svh,112px);padding-bottom:clamp(64px,10svh,112px)}
#flight-more{padding-bottom:clamp(24px,4svh,48px)}
.steps-section{background:var(--dark);color:#fff;padding-top:clamp(40px,6svh,72px)}
.steps-section .more-head h2{font-size:clamp(40px,4.6vw,78px)}
.steps-section .more-head .text-link{margin-top:14px}
.step-strip{list-style:none;margin:0;padding:0;display:grid;grid-template-columns:repeat(4,1fr);gap:clamp(12px,1.4vw,22px)}
.step-strip figure{margin:0 0 16px;border-radius:var(--radius-media);overflow:hidden;aspect-ratio:4/5;background:#141615}
.step-strip video{width:100%;height:100%;object-fit:cover;display:block}
.step-strip .step-no{font-size:12px;font-weight:700;letter-spacing:.16em;color:#ff5a68}
.step-strip h3{margin:6px 0 6px;font-size:clamp(19px,1.6vw,26px);font-weight:800;letter-spacing:-.03em}
.step-strip p{font-size:14px;line-height:1.7;color:#ffffffad}
@media(max-width:800px){.step-strip{grid-template-columns:1fr 1fr;row-gap:28px}.step-strip figure{aspect-ratio:1/1}}
.lta-chapter{position:absolute;left:var(--gutter);top:calc(var(--header) + 24px);z-index:3;margin:0;font-size:13px;font-weight:700;letter-spacing:.14em;color:var(--ink);opacity:calc(1 - var(--turn,0)*1.5);pointer-events:none}
.lta-chapter span{color:var(--red);margin-right:12px}.steps-section .more-head .eyebrow{color:var(--red)}.step-strip video{transform:scale(1.08);transform-origin:50% 20%}

/* v0.6 · 首屏黄昏照片＋视差；滚动平滑由脚本接管，关掉原生 smooth 以免叠加 */
html{scroll-behavior:auto}
#hero-image,#hero-image img{display:block;width:100%;height:100%;object-fit:cover}
#hero-image img{object-position:center 62%;animation:hero-push 14s cubic-bezier(.2,.6,.2,1) both}
@keyframes hero-push{from{transform:scale(1.1)}to{transform:scale(1)}}
.intro-media{will-change:transform}
.intro-shade{background:linear-gradient(90deg,rgba(8,12,22,.55),rgba(8,12,22,0) 62%),linear-gradient(0deg,rgba(8,12,22,.5),transparent 50%)}
.rise{transition-duration:1.1s!important}
.rise:not(.is-in){transform:translateY(48px)}
@media(prefers-reduced-motion:reduce){#hero-image img{animation:none}}#hero-image img{object-position:28% 60%}

/* v0.6 · 概念页三张卡：统一风格的示意线稿（取代低清视频截帧，避免与下方板块重复） */
.concept-card figure.concept-art{background:radial-gradient(120% 100% at 50% 40%,#2b302e 0%,#171918 72%);display:block}
.concept-art svg{width:100%;height:100%;display:block;transition:transform 1.1s cubic-bezier(.16,1,.3,1)}
.concept-card:hover .concept-art svg{transform:scale(1.04)}
.concept-art .a-grid path{stroke:#ffffff14;stroke-width:1;fill:none}
.concept-art .a-line{fill:none;stroke:#ffffffb3;stroke-width:1.6;stroke-linejoin:round;stroke-linecap:round}
.concept-art .a-hull{fill:#ffffff14;stroke:#ffffffcc;stroke-width:1.8}
.concept-art .a-hullfill{fill:#ffffff12;stroke:#ffffffcc;stroke-width:1.6;stroke-linejoin:round}
.concept-art .a-fin{fill:var(--red);stroke:var(--red);stroke-width:1;stroke-linejoin:round}
.concept-art .a-band{stroke:#3ecf6e;stroke-width:3}
.concept-art .a-shadow{fill:#000;opacity:.35}
.concept-art .a-path{fill:none;stroke:#ffffff40;stroke-width:1.4;stroke-dasharray:3 7;animation:a-dash 3s linear infinite}
.concept-art .a-lit{fill:#ff3348;filter:drop-shadow(0 0 4px #ff3348)}
.concept-art .a-float{animation:a-float 6s ease-in-out infinite}
.concept-art .a-late{animation-delay:-2.4s;animation-duration:4.6s}
.concept-art .a-rings circle{fill:none;stroke:var(--red);stroke-width:1.6;transform-origin:200px 146px;animation:a-ring 3.6s cubic-bezier(.2,.6,.3,1) infinite}
.concept-art .a-rings circle:nth-child(2){animation-delay:1.2s}.concept-art .a-rings circle:nth-child(3){animation-delay:2.4s}
.concept-art .a-link{fill:none;stroke:#ff4b5e;stroke-width:1.6;stroke-dasharray:2 8;stroke-linecap:round;animation:a-dash 1.6s linear infinite}
.concept-art .a-tag{fill:#fff;font-size:12px;font-weight:800;letter-spacing:.14em;text-anchor:middle}
.concept-art .a-win{fill:#ffffff08;stroke:#ffffff59;stroke-width:1.4}
.concept-art .a-dot{fill:#ffffff40}
.concept-art .a-sea{fill:#7fa3c414;stroke:#7fa3c466;stroke-width:1.2}
.concept-art .a-route{fill:none;stroke:var(--red);stroke-width:2;stroke-dasharray:6 6;animation:a-dash 2s linear infinite}
.concept-art .a-wp{fill:#171918;stroke:#fff;stroke-width:1.6}
.concept-art .a-mover{fill:#ff3348;filter:drop-shadow(0 0 5px #ff3348)}
.concept-art .a-bar{fill:#ffffff2e}.concept-art .a-bar2{fill:#ffffff52}
.concept-art .a-spark{fill:none;stroke:#7fa3c4;stroke-width:1.6;stroke-linejoin:round}
.concept-art .a-btn{fill:var(--red)}
.concept-art .a-btntext{fill:#fff;font-size:10px;font-weight:800;text-anchor:middle}
@keyframes a-dash{to{stroke-dashoffset:-40}}
@keyframes a-float{50%{transform:translateY(-5px)}}
@keyframes a-ring{from{transform:scale(.6);opacity:.9}to{transform:scale(3.4);opacity:0}}
@media(prefers-reduced-motion:reduce){.concept-art *{animation:none!important}}.concept-art .a-hull{fill:#3a403d}.concept-art .a-hullfill{fill:#2f3432}

/* v0.6 · LTA 段：进度条、收尾产品卡、精简操作区 */
.product-track{height:380svh}
@media(max-width:1000px){.product-track{height:390svh}}
@media(max-width:700px){.product-track{height:400svh}}
#structure-toggle,#lta-zoom-in,#lta-zoom-out{display:none!important}
.tech-dock li.tech-progress{display:flex!important;gap:6px;border:0!important;padding:0 0 14px}
.tech-progress i{flex:1;height:3px;border-radius:2px;background:#24262520;overflow:hidden;position:relative}
.tech-progress i::after{content:'';position:absolute;inset:0;background:var(--red);transform:scaleX(var(--f,0));transform-origin:left;transition:transform .25s linear}
.lta-finale{position:absolute;left:var(--gutter);top:30%;width:min(36%,460px);z-index:4;opacity:0;transform:translateY(24px);pointer-events:none;transition:opacity .6s,transform .8s cubic-bezier(.16,1,.3,1)}
.product-stage.finale .lta-finale{opacity:1;transform:none;pointer-events:auto}
.product-stage.finale .tech-dock{opacity:0!important;pointer-events:none}
.product-stage.finale .product-heading{opacity:0!important;transition:opacity .5s}
.lta-finale h3{font-size:clamp(48px,5.4vw,92px);font-weight:800;letter-spacing:-.05em;line-height:1;margin:4px 0 16px}
.fin-lead{font-size:16px;line-height:1.75;color:var(--muted)}
.fin-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:22px 16px;margin:28px 0 26px;padding-top:20px;border-top:1px solid #24262522}
.fin-stats div{opacity:0;transform:translateY(14px);transition:opacity .5s,transform .7s cubic-bezier(.16,1,.3,1)}
.product-stage.finale .fin-stats div{opacity:1;transform:none}
.product-stage.finale .fin-stats div:nth-child(2){transition-delay:.12s}.product-stage.finale .fin-stats div:nth-child(3){transition-delay:.24s}.product-stage.finale .fin-stats div:nth-child(4){transition-delay:.36s}
.fin-stats dt{font-size:12px;letter-spacing:.12em;color:var(--muted)}
.fin-stats dd{margin:6px 0 0;font-size:clamp(30px,3vw,48px);font-weight:800;letter-spacing:-.04em;line-height:1}
.fin-stats dd small{font-size:.4em;margin-left:3px;font-weight:700;letter-spacing:0}
#lta-stage{transition:transform 1.2s cubic-bezier(.16,1,.3,1)}
@media(min-width:1001px){.product-stage.finale #lta-stage{transform:translateX(20%)}}
.fin-cta{display:inline-flex;align-items:center;gap:10px;padding:13px 22px;border-radius:999px;background:var(--ink);color:#fff;text-decoration:none;font-size:15px;font-weight:700;transition:background .3s}
.fin-cta .icon{transition:transform .4s cubic-bezier(.16,1,.3,1)}
.fin-cta:hover,.fin-cta:focus-visible{background:var(--red)}.fin-cta:hover .icon{transform:translateX(5px)}
@media(max-width:1000px){.lta-finale{left:var(--gutter);right:var(--gutter);width:auto;top:auto;bottom:88px;background:var(--paper);padding-top:12px}.lta-finale h3{font-size:40px;margin-bottom:8px}.fin-lead{font-size:14px}.fin-stats{margin:16px 0}}@media(max-width:700px){.fin-lead{display:none}.lta-finale h3{font-size:34px}.fin-stats{margin:10px 0 12px;padding-top:12px}.fin-stats dd{font-size:26px}}
@media(max-width:700px){.fin-cta{padding:10px 18px;font-size:14px}}

/* 视频加载前先显示封面底图，开始播放后视频淡入，避免黑框 */
figure.has-poster{background-size:cover;background-position:center}figure.has-poster video{opacity:0;transition:opacity .5s}figure.has-poster video.is-ready{opacity:1}@media(prefers-reduced-motion:reduce){figure.has-poster video{opacity:1}}

/* v0.6 · 通感一体：三维数字孪生场景 */
.net-section{background:#050c18;color:#fff}
.net-stage{position:relative;height:100svh;min-height:680px;overflow:hidden;background:radial-gradient(120% 90% at 62% 40%,#0d2340 0%,#071226 48%,#040a15 100%)}
#net-canvas{position:absolute;inset:0;width:100%;height:100%;display:block;opacity:0;transition:opacity 1.2s}
.net-ready #net-canvas{opacity:1}
.net-shade{position:absolute;inset:0;pointer-events:none;background:linear-gradient(90deg,rgba(4,10,21,.82) 0%,rgba(4,10,21,.35) 34%,rgba(4,10,21,0) 55%),linear-gradient(0deg,rgba(4,10,21,.6),rgba(4,10,21,0) 26%)}
.net-labels{position:absolute;inset:0;pointer-events:none;z-index:2}
.net-label{position:absolute;left:0;top:0;padding:4px 9px;border-radius:99px;font-size:11px;font-weight:700;letter-spacing:.04em;white-space:nowrap;color:#d9ecff;background:rgba(6,16,32,.72);border:1px solid rgba(56,215,255,.38);backdrop-filter:blur(6px);transition:background .3s,border-color .3s,color .3s,opacity .3s}
.net-label[data-node]{pointer-events:auto;cursor:pointer}
.net-label.is-on{background:var(--red);border-color:var(--red);color:#fff}
.net-copy{position:absolute;z-index:3;left:var(--gutter);top:calc(var(--header) + 28px);width:min(380px,32%)}
.net-copy .chapter-no{color:#ff5a68}
.net-copy h2{font-size:clamp(56px,6.6vw,112px);margin:.1em 0 .18em}
.net-lead{font-size:16px;line-height:1.75;color:#ffffffb3;margin-bottom:28px}
.net-list{list-style:none;margin:0;padding:0;border-top:1px solid #ffffff1f}
.net-list button{position:relative;display:flex;align-items:baseline;gap:16px;width:100%;padding:13px 0 13px 14px;border-bottom:1px solid #ffffff1f;text-align:left;color:#ffffff73;transition:color .3s}
.net-list button::before{content:'';position:absolute;left:0;top:12px;bottom:12px;width:3px;background:var(--red);transform:scaleY(0);transition:transform .45s cubic-bezier(.16,1,.3,1)}
.net-list button[aria-selected=true]{color:#fff}
.net-list button[aria-selected=true]::before{transform:scaleY(1)}
.net-list button:hover{color:#fff}
.net-no{font-size:11px;font-weight:700;letter-spacing:.14em;color:#ffffff59}
.net-list button[aria-selected=true] .net-no{color:#ff5a68}
.net-name{font-size:clamp(16px,1.3vw,20px);font-weight:700;letter-spacing:-.01em}
.net-card{position:absolute;z-index:3;right:var(--gutter);bottom:clamp(40px,7svh,72px);width:min(360px,30%);border-radius:16px;overflow:hidden;background:rgba(8,18,34,.62);border:1px solid rgba(255,255,255,.12);backdrop-filter:blur(14px) saturate(1.2);box-shadow:0 30px 60px -20px rgba(0,0,0,.6)}
.net-card figure{margin:0;aspect-ratio:16/10;overflow:hidden;background:#0b1626}
.net-card img{width:100%;height:100%;object-fit:cover;display:block}
.net-card>div{padding:16px 20px 20px}
.net-card .card-kicker{color:#ff5a68}
.net-card h3{font-size:22px;font-weight:800;letter-spacing:-.02em;margin:2px 0 8px}
.net-card p:not(.card-kicker){font-size:14px;line-height:1.7;color:#ffffffb8}
.net-card .tags{margin-top:12px}
.net-card .tags li{border-color:#ffffff40;color:#fff}
.net-card.is-in figure img,.net-card.is-in>div{animation:net-in .6s cubic-bezier(.16,1,.3,1)}
@keyframes net-in{from{opacity:0;transform:translateY(10px)}}
.net-note{position:absolute;z-index:3;left:var(--gutter);bottom:22px;font-size:11px;color:#ffffff59;letter-spacing:.04em}
.net-fail #net-canvas{display:none}
@media(max-width:1000px){.net-copy{width:min(420px,46%)}.net-card{width:min(340px,42%)}}
@media(max-width:800px){.net-stage{height:auto;min-height:0;display:flex;flex-direction:column;padding-top:calc(var(--header) + 12px)}.net-copy{position:relative;left:auto;top:auto;width:auto;order:1;padding:0 var(--gutter)}#net-canvas{position:relative;order:2;height:58svh}.net-labels{top:auto;height:58svh}.net-shade{display:none}.net-copy h2{font-size:52px}.net-lead{margin-bottom:14px}.net-list{display:flex;gap:8px;overflow-x:auto;border:0;padding-bottom:4px;scrollbar-width:none}.net-list::-webkit-scrollbar{display:none}.net-list li{flex:none}.net-list button{padding:8px 14px;border:1px solid #ffffff2e;border-radius:99px;gap:8px}.net-list button::before{display:none}.net-list button[aria-selected=true]{background:var(--red);border-color:var(--red)}.net-list button[aria-selected=true] .net-no{color:#fff}.net-name{font-size:14px}.net-card{position:relative;order:3;right:auto;bottom:auto;width:auto;margin:0 var(--gutter) 28px}.net-note{position:relative;order:4;left:auto;bottom:auto;padding:0 var(--gutter) 28px}}
@media(prefers-reduced-motion:reduce){.net-card.is-in figure img,.net-card.is-in>div{animation:none}}@media(max-width:800px){.net-labels{top:0;height:auto;bottom:0}.net-label{font-size:10px;padding:3px 7px}}

/* 性能：每帧移动的标签与动画元素不用模糊/投影滤镜（重绘开销大） */
.net-label{backdrop-filter:none;background:rgba(6,16,32,.86)}.net-label{will-change:transform}.concept-art .a-lit,.concept-art .a-mover{filter:none}
.step-strip video{transform:none}

/* 海事四步接力播放：当前段高亮，其余停在封面 */
.step-strip li{transition:opacity .5s}.step-strip li:not(.is-playing){opacity:.55}.step-strip li.is-playing figure{box-shadow:0 0 0 2px var(--red)}.step-strip li figure{transition:box-shadow .4s}.step-strip li.is-playing .step-no::after{content:' · 播放中';color:#ffffff80;letter-spacing:.06em}@media(hover:hover){.step-strip li{cursor:pointer}}

.product-tools{justify-content:flex-end}
@media(max-width:700px){.fin-stats{grid-template-columns:repeat(4,1fr);gap:10px}.fin-stats dt{font-size:11px;letter-spacing:.04em}.fin-stats dd{font-size:22px}}
.history-images img[data-year-image="2"]{transform:scale(1.5);transform-origin:38% 0;filter:brightness(.5) saturate(.85)}
/* 10/14 rhythm: case study + founder on paper, breaking the long dark run */
.steps-section,.founder-card{background:var(--paper);color:var(--ink)}
.steps-section .more-head p,.step-strip p{color:var(--muted)}
.step-strip .step-no{color:var(--red)}
.step-strip li.is-playing .step-no::after{color:#24262580}
.step-strip figure,.founder-card figure{background:#e4e5df}
.steps-section .text-link{color:var(--ink)}
.founder-card h2 span{color:var(--muted)}
.founder-role{color:var(--muted)}
.founder-facts{border-top-color:#24262522}
.founder-facts li{border-bottom-color:#24262522;color:var(--ink)}.step-strip li:not(.is-playing){opacity:1}.step-strip li:not(.is-playing) figure{filter:saturate(.35) brightness(.92)}.step-strip li figure{transition:box-shadow .4s,filter .5s}
/* 10/14 readability: nothing that is read (not a tag) under 14px; light copy on dark brighter */
#history-meaning{font-size:15px;color:#e3ebe1}
#history-story{font-size:14px}
.tags li{font-size:13.5px;opacity:.85}
.net-note{font-size:12px;color:#ffffff8c}
@media(min-width:701px){.net-label{font-size:12.5px}.fx-label{font-size:13px}}
.command-principles li p,.command-principles>div>p{font-size:15px;color:#ffffffcc}
.more-section .product-cards p,.more-section .more-head p{color:#ffffffc4}
.fin-stats dt{font-size:13px}/* 10/14 CJK tracking: Chinese headings breathe a little; numerals / Latin (年份、LTA850A、参数) stay tight */
h1,h2,h3,.command-principles h3,.concept-card h3,.tech-row h3,.nav-label,.td-name,.product-card h3,.step-strip h3{letter-spacing:-.012em}
.lta-giant{letter-spacing:-.03em}/* 10/14 chapter nav: header-centre pill, visible only inside the three chapters */
.chapter-nav{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%) translateY(-6px);display:flex;gap:2px;padding:4px;border-radius:99px;background:color-mix(in srgb,currentColor 9%,transparent);opacity:0;pointer-events:none;transition:opacity .4s,transform .5s cubic-bezier(.16,1,.3,1)}
.site-header.show-chapters .chapter-nav{opacity:1;pointer-events:auto;transform:translate(-50%,-50%)}
.chapter-nav a{position:relative;display:flex;align-items:center;gap:7px;padding:8px 16px;border-radius:99px;font-size:13.5px;font-weight:700;opacity:.62;overflow:hidden;transition:opacity .3s,background .3s}
.chapter-nav a span{font-size:10.5px;letter-spacing:.08em;color:var(--red)}
.chapter-nav a:hover{opacity:1}
.chapter-nav a.is-on{opacity:1;background:color-mix(in srgb,currentColor 10%,transparent)}
.chapter-nav i{position:absolute;left:16px;right:16px;bottom:4px;height:2px;border-radius:2px;background:var(--red);transform:scaleX(var(--p,0));transform-origin:left;opacity:0;transition:opacity .3s}
.chapter-nav a.is-on i{opacity:1}
@media(max-width:1100px){.chapter-nav{display:none}}/* 10/14 buttons: solid pill = action (主按钮), text + icon = secondary; tags are labels, so no outline that reads as a button */
.tags li,.net-card .tags li{border:0;border-radius:6px;padding:7px 10px;background:color-mix(in srgb,currentColor 10%,transparent);opacity:1}
.text-link{font-weight:700}#history-story{display:inline-flex;align-items:center;gap:10px;margin-top:22px;padding:12px 20px;border-radius:99px;border:0;background:#ffffff1f;color:#fff;font-size:14px;font-weight:700;text-decoration:none;transition:background .3s}
#history-story:hover,#history-story:focus-visible{background:var(--red)}
#history-story .icon{transition:transform .4s cubic-bezier(.16,1,.3,1)}#history-story:hover .icon{transform:translateX(4px)}@media(max-width:700px){.contact-mark{width:115vw;right:-38vw;top:38%}}
/* 10/19 中英切换按钮 */
.lang-toggle{display:inline-flex;align-items:center;gap:2px;padding:3px;border:1px solid color-mix(in srgb,currentColor 28%,transparent);border-radius:99px;background:none;color:inherit;font:inherit;font-size:12px;font-weight:700;letter-spacing:.04em;cursor:pointer;line-height:1}
.lang-toggle span{display:block;min-width:30px;padding:6px 8px;border-radius:99px;text-align:center;opacity:.6;transition:background .3s,color .3s,opacity .3s}
.lang-toggle span.is-on{opacity:1;background:#fff;color:var(--dark)}
.site-header.on-paper .lang-toggle span.is-on{background:var(--ink);color:var(--paper)}
.lang-toggle:hover span:not(.is-on){opacity:1}
.header-actions{display:flex;align-items:center;gap:clamp(14px,2vw,28px)}/* 10/19 English layout: Latin words are longer and can't break anywhere like Chinese */
html[lang=en] h1,html[lang=en] h2,html[lang=en] h3{letter-spacing:-.02em;overflow-wrap:break-word;hyphens:manual}
.concept-grid>*,.step-strip>li,.product-cards>*,.command-principles ol>li,.founder-facts>li{min-width:0}
html[lang=en] .concept-card h3{font-size:clamp(28px,2.7vw,46px)}html[lang=en] .td-name{font-size:clamp(18px,1.55vw,26px);letter-spacing:-.02em}html[lang=en] .tech-dock{width:min(33%,430px)}
html[lang=en] .step-strip li.is-playing .step-no::after{content:' · Playing'}
html[lang=en] .net-copy h2{font-size:clamp(56px,6.6vw,112px);overflow-wrap:normal}
@media(min-width:1001px){html[lang=en] .net-copy{width:min(440px,34%)}}
html[lang=en] .net-list button{font-size:15px}html[lang=en] #history-title{font-size:clamp(36px,4.2vw,68px)}
html[lang=en] .nav-label{font-size:clamp(32px,4.4vw,76px);letter-spacing:-.03em}html[lang=en] .nav-desc{max-width:26ch;font-size:14px;line-height:1.5}
html[lang=en] #hero-title{font-size:clamp(40px,5.4vw,82px);line-height:1.04}
#task-film::cue{font-family:"DY Noto","Microsoft YaHei",sans-serif;font-size:clamp(14px,1.6vw,22px);line-height:1.35;color:#fff;background:rgba(0,0,0,.62)}
/* 10/22 王洋评审：LTA850 改为三项参数 */
.fin-stats{grid-template-columns:repeat(3,1fr)}
@media(max-width:700px){.fin-stats{grid-template-columns:repeat(3,1fr)}}
/* 10/22 历程新配图（多翼自己的产品与作业画面）：覆盖旧图的裁切与亮度规则 */
.history-images img[data-year-image="1"]{object-position:72% center;filter:brightness(.78);transform:none}
.history-images img[data-year-image="2"]{object-position:center 35%;filter:brightness(.74) saturate(.95);transform:none}
.history-images img[data-year-image="3"]{object-position:center 30%;filter:brightness(.52) saturate(.9);transform:none}
/* 10/22 页脚：新闻、关于、英文入口（便于访客和爬虫找到这些页面） */
.footer-links{display:flex;gap:clamp(14px,2vw,24px);font-size:13px}
.footer-links a{color:inherit;opacity:.72;text-decoration:none}
.footer-links a:hover{opacity:1;text-decoration:underline;text-underline-offset:4px}
@media(max-width:700px){.footer-links{margin:14px 0}}