:root{--ink:#eef4f0;--muted:#9db4ad;--dim:#708a82;--bg:#071517;--panel:#0e2425;--line:#234443;--teal:#58d4bf;--gold:#e9c77d;--red:#e56b52;--max:1240px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;background:var(--bg)}
body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.7 "Microsoft YaHei UI","PingFang SC",sans-serif}
a{color:inherit;text-decoration:none}
button,select,input{font:inherit;color:inherit}
.shell{width:min(var(--max),calc(100% - 48px));margin:auto}
.site-nav{position:fixed;z-index:30;inset:0 0 auto;background:#071517e6;border-bottom:1px solid #ffffff0d;backdrop-filter:blur(16px)}
.nav-inner{height:76px;display:flex;align-items:center;gap:34px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;letter-spacing:3px;color:#fff}
.brand-mark{width:28px;height:32px;color:var(--gold)}
.nav-links{display:flex;gap:22px;margin-left:auto;color:var(--muted);font-size:13px}
.nav-links a:hover,.nav-links a.active{color:var(--teal)}
.nav-action,.button{display:inline-flex;align-items:center;gap:15px;border:1px solid var(--teal);border-radius:3px;padding:10px 18px;color:#071517;background:var(--teal);font-weight:700;font-size:13px}
.button.ghost,.nav-action.ghost{background:transparent;color:var(--teal);border-color:#58d4bf66}
.button.gold{background:var(--gold);border-color:var(--gold)}
.hero{position:relative;min-height:760px;padding:180px 0 100px;overflow:hidden;background:linear-gradient(90deg,#071517f5 0%,#071517b5 42%,#0715173d),url('/xianfa/media/hero-island.jpg') center/cover}
.hero:after{content:"";position:absolute;inset:auto 0 0;height:170px;background:linear-gradient(transparent,var(--bg));pointer-events:none}
.hero-copy{position:relative;z-index:1;max-width:650px}
.kicker{color:var(--teal);font-size:12px;letter-spacing:4px;font-weight:700}
.hero h1{font-family:KaiTi,"STKaiti",serif;font-size:clamp(60px,10vw,132px);line-height:1;letter-spacing:12px;margin:20px 0}
.hero h1 small{display:block;font-family:inherit;color:var(--gold);font-size:.35em;letter-spacing:8px;margin-top:18px}
.lead{font-size:20px;color:#d0e2db;letter-spacing:3px;max-width:510px}
.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:32px}
.status{display:flex;gap:10px;align-items:center;color:var(--muted);margin-top:25px;font-size:13px}
.status i{width:7px;height:7px;background:#6be29f;border-radius:50%;box-shadow:0 0 14px #6be29f;display:inline-block}
.section{padding:110px 0}
.section.alt{background:#0a1d1f}
.section-head{display:flex;justify-content:space-between;align-items:end;gap:25px;margin-bottom:45px}
.eyebrow{color:var(--teal);font-size:11px;letter-spacing:3px;font-weight:700}
.section h2{font-family:KaiTi,"STKaiti",serif;font-size:clamp(32px,5vw,58px);letter-spacing:5px;line-height:1.2;margin:10px 0}
.section-head p{max-width:460px;color:var(--muted);margin:0}
.grid{display:grid;gap:18px}
.grid.two{grid-template-columns:repeat(2,1fr)}
.grid.three{grid-template-columns:repeat(3,1fr)}
.card{border:1px solid var(--line);background:linear-gradient(145deg,#112b2b,#0b1e20);padding:27px;border-radius:5px}
.card h3{font-size:21px;margin:16px 0 6px}
.card p{color:var(--muted);margin:0}
.card .num{color:var(--gold);font:28px Georgia,serif}
.media-card{position:relative;overflow:hidden;min-height:340px;border:1px solid var(--line);background:#102b2b}
.media-card img{width:100%;height:100%;min-height:340px;object-fit:cover;opacity:.65;transition:transform .5s,opacity .5s}
.media-card:hover img{transform:scale(1.04);opacity:.85}
.media-copy{position:absolute;inset:auto 24px 22px}
.media-copy h3{font-size:27px;margin:4px 0}
.media-copy p{color:#d7e6df;margin:0}
.spec-list{display:grid;gap:11px;margin:22px 0;padding:0;list-style:none}
.spec-list li{display:flex;justify-content:space-between;gap:15px;border-bottom:1px solid #ffffff12;padding-bottom:8px;color:var(--muted)}
.spec-list b{color:var(--ink)}
.video-frame{background:#020708;border:1px solid var(--line);padding:8px}
.video-frame video{display:block;width:100%;max-height:680px;background:#000}
.video-tabs{display:flex;gap:8px;margin-top:15px;flex-wrap:wrap}
.video-tabs button{cursor:pointer;border:1px solid var(--line);background:var(--panel);padding:10px 15px;font-size:13px}
.video-tabs button.active{border-color:var(--teal);color:var(--teal)}
.gallery{display:grid;grid-template-columns:1.5fr 1fr 1fr;grid-auto-rows:170px;gap:10px}
.gallery img{width:100%;height:100%;object-fit:cover;border:1px solid var(--line)}
.gallery img:first-child{grid-row:span 2}
.footer{border-top:1px solid var(--line);padding:30px 0 45px;color:var(--dim);font-size:12px}
.page-hero{padding:155px 0 65px;background:linear-gradient(180deg,#102f30,#071517)}
.page-hero h1{font-family:KaiTi,"STKaiti",serif;font-size:clamp(45px,7vw,82px);letter-spacing:7px;margin:12px 0}
.page-hero p{max-width:680px;color:var(--muted);font-size:17px}
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:30px}
.filter-bar button{cursor:pointer;border:1px solid var(--line);background:transparent;padding:9px 15px;color:var(--muted)}
.filter-bar button.active{border-color:var(--gold);color:var(--gold)}
.skill-card{cursor:pointer;transition:transform .2s,border-color .2s}
.skill-card:hover,.skill-card.selected{transform:translateY(-3px);border-color:var(--teal)}
.skill-icon{width:42px;height:42px;border-radius:50%;display:grid;place-items:center;color:#071517;font-weight:900;background:var(--gold)}
.skill-card p{font-size:13px}
.lab{display:grid;grid-template-columns:1.1fr .9fr;gap:25px;align-items:start}
.lab-panel{position:sticky;top:100px;border:1px solid var(--line);padding:28px;background:#0b2021}
.lab-panel h2{font-family:KaiTi,"STKaiti",serif;font-size:34px;margin:8px 0}
.meter{height:7px;background:#193637;margin:9px 0 18px}
.meter i{display:block;height:100%;background:var(--teal)}
.timeline{display:flex;gap:3px;height:38px;margin:20px 0}
.timeline span{flex:1;display:flex;align-items:center;justify-content:center;background:#173536;color:#9db4ad;font-size:11px}
.timeline span.hot{background:#8a493d;color:#fff}
.model-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:20px;align-items:start}
.model-viewer{min-height:600px;background:radial-gradient(circle at 50% 40%,#244d4b,#071517 65%);border:1px solid var(--line);position:relative}
.model-viewer canvas{width:100%;height:600px;display:block}
.model-hint{position:absolute;left:18px;bottom:16px;color:var(--muted);font-size:12px}
.model-top-bar{position:absolute;left:16px;top:16px;right:16px;display:flex;gap:8px;flex-wrap:wrap;z-index:2}
.model-top-bar button{cursor:pointer;border:1px solid var(--line);background:#071517cc;backdrop-filter:blur(8px);padding:7px 13px;font-size:12px;border-radius:4px;color:var(--muted)}
.model-top-bar button.active{border-color:var(--gold);color:var(--gold);background:#143233ee}
.model-info{border:1px solid var(--line);background:#0b2021;padding:27px}
.model-info h2{font-family:KaiTi,"STKaiti",serif;font-size:34px;margin:7px 0}
.model-list{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}
.model-item{display:flex;flex-direction:column;gap:6px;padding:16px;border:1px solid var(--line);cursor:pointer;background:#0b2021;border-radius:4px;transition:border-color .2s,transform .2s}
.model-item:hover{transform:translateY(-2px);border-color:#58d4bf88}
.model-item.active{border-color:var(--gold);background:#122d2e}
.model-item b{display:block;font-size:16px}
.model-item span{color:var(--muted);font-size:12.5px}
.sub-label{font-size:11px;letter-spacing:2px;color:var(--teal);margin:16px 0 8px;font-weight:700}
.chip-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.chip-btn{cursor:pointer;border:1px solid var(--line);background:#0f2829;padding:7px 4px;border-radius:4px;font-size:12px;text-align:center;display:flex;align-items:center;justify-content:center;gap:6px}
.chip-btn i{width:10px;height:10px;border-radius:50%;display:inline-block}
.chip-btn.active{border-color:var(--gold);color:#fff;background:#193c3d}
.anim-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:6px}
.anim-btn{cursor:pointer;border:1px solid var(--line);background:#0f2829;padding:7px 6px;border-radius:4px;font-size:12px;text-align:center;color:var(--muted)}
.anim-btn.active{border-color:var(--teal);color:#071517;background:var(--teal);font-weight:700}
.sim-layout{display:grid;grid-template-columns:1.25fr .75fr;gap:22px;align-items:start}
.sim-stage{border:1px solid var(--line);background:#081c1e;padding:10px;border-radius:5px}
.sim-stage canvas{width:100%;height:auto;display:block;background:#143236;border-radius:3px}
.sim-side{border:1px solid var(--line);background:#0b2021;padding:24px;border-radius:5px}
.sim-side label{display:block;margin-bottom:13px;font-size:13px;color:var(--muted)}
.sim-side label b{float:right;color:var(--gold)}
.sim-side input[type=range],.sim-side select{width:100%;margin-top:5px;accent-color:var(--teal);background:#122d2e;border:1px solid var(--line);padding:6px 8px;border-radius:4px}
.sim-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin:16px 0}
.sim-stat{border:1px solid var(--line);background:#10292b;padding:10px 12px;border-radius:4px}
.sim-stat strong{display:block;font-size:20px;color:var(--gold)}
.sim-stat span{font-size:12px;color:var(--muted)}
.callout{border-left:2px solid var(--gold);padding:13px 17px;color:#c4d6cf;background:#102729;margin-top:18px}
.download-hero{background:linear-gradient(120deg,#123c3d,#071517)}
.download-grid{display:grid;grid-template-columns:1fr 1fr;gap:25px;align-items:start}
.requirements{border:1px solid var(--line);padding:28px;background:#0b2021}
.requirements h3{margin-top:0}
.release-row{display:flex;justify-content:space-between;gap:20px;padding:15px 0;border-bottom:1px solid #ffffff12;color:var(--muted)}
.release-row b{color:var(--ink)}
@media(max-width:850px){.nav-links{display:none}
.section-head{display:block}
.section-head p{margin-top:15px}
.grid.three,.grid.two,.lab,.model-layout,.sim-layout,.download-grid,.model-list{grid-template-columns:1fr}
.lab-panel{position:static}
.hero{min-height:700px}
.gallery{grid-template-columns:1fr 1fr}
.gallery img:first-child{grid-column:span 2;grid-row:auto}
}
@media(max-width:520px){.shell{width:min(100% - 30px,var(--max))}
.nav-inner{height:64px}
.nav-action{display:none}
.hero{padding-top:130px}
.hero h1{letter-spacing:6px}
.section{padding:75px 0}
.gallery{display:grid;grid-template-columns:1fr;grid-auto-rows:190px}
.gallery img:first-child{grid-column:auto}
.page-hero{padding-top:120px}
}