:root{color-scheme:dark;--ink:#e4edf3;--muted:#8299aa;--ice:#a4d2df;--brass:#d9b578;--bg:#09121b;--panel:#101e2a;--line:#263946;font-family:Segoe UI,PingFang SC,Microsoft YaHei,sans-serif;font-synthesis:none;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:28px}body{margin:0;min-width:300px}button,input,select{font:inherit}a{color:inherit;text-decoration:none}button,a,input,select,summary{-webkit-tap-highlight-color:transparent}a,button,summary{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}[hidden]{display:none!important}a:focus-visible,button:focus-visible,input:focus-visible,select:focus-visible,summary:focus-visible{outline:3px solid var(--ice);outline-offset:5px}.wrap{width:min(1344px,calc(100% - 96px));margin-inline:auto}.skip-link{position:fixed;left:20px;top:12px;padding:12px 18px;background:var(--ice);color:#0a1a23;transform:translateY(-180%);z-index:100}.skip-link:focus{transform:none}.site-header{display:flex;align-items:center;justify-content:space-between;gap:28px;min-height:100px;border-bottom:1px solid var(--line)}.brand{display:flex;gap:13px;align-items:center;font-size:21px;font-weight:600;letter-spacing:.06em;white-space:nowrap}.brand img{width:40px;height:40px}.brand-3d{color:var(--ice);padding-inline:4px;letter-spacing:0}.site-header nav{display:flex;gap:30px;align-items:center;font-size:13px;color:#b6c7d2}.site-header nav a{padding-block:15px}.site-header nav a:hover{color:#fff}.hero{display:grid;grid-template-columns:.95fr 1.2fr;gap:50px;align-items:center;padding-block:68px 72px}.eyebrow{font-size:12px;letter-spacing:.11em;line-height:1.8;color:var(--muted);margin:0 0 21px}.status-dot{display:inline-block;width:6px;height:6px;margin-right:8px;margin-bottom:2px;border-radius:50%;background:var(--brass)}h1{font-family:"Noto Serif SC",Songti SC,STSong,SimSun,serif;font-weight:500;font-size:clamp(42px,4.2vw,64px);line-height:1.35;letter-spacing:.025em;margin:0 0 22px}h1 em{font-style:normal;color:var(--ice)}.hero-intro{font-size:15px;color:#b0c2ce;line-height:1.95;margin:0}.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:32px}.button{display:inline-flex;align-items:center;justify-content:center;gap:20px;border-radius:6px;min-height:46px;padding:12px 19px;font-size:13px;font-weight:500;border:1px solid transparent;line-height:1.5}.primary{background:#c1dde5;color:#142631;border-color:#c1dde5}.primary:hover{background:#d5e9ee}.secondary{border-color:#375363;color:#bfd2dd;background:transparent}.secondary:hover{border-color:#7e9cad;background:#152735}.hero-footnote{font-size:11px;color:var(--muted);margin:20px 0 0;letter-spacing:.03em}.hero-scene{align-self:stretch;min-height:380px;position:relative;display:block;border-radius:12px;background:#0d1a25;overflow:hidden;border:1px solid #243a48}.hero-scene>img{width:100%;height:100%;display:block;object-fit:cover;object-position:45% 50%;position:absolute;inset:0;transition:transform .5s}.hero-scene:hover>img{transform:scale(1.025)}.hero-scene:after{content:"";position:absolute;inset:50% 0 0;background:linear-gradient(transparent,#07101aed);pointer-events:none}.scene-caption{position:absolute;bottom:25px;left:26px;right:23px;z-index:1;display:flex;align-items:center;justify-content:space-between;gap:14px}.scene-caption small{display:block;font-size:11px;color:#96adbc;margin-bottom:9px}.scene-caption strong{font-size:18px;font-weight:500;letter-spacing:.03em}.scene-enter{width:40px;height:40px;border:1px solid #7394a6;border-radius:50%;display:grid;place-items:center;color:#d6eaf2;font-size:22px}.catalog-section{padding-top:16px;padding-bottom:30px}.section-heading{display:flex;align-items:end;justify-content:space-between;gap:25px;margin-bottom:30px}.section-heading .eyebrow{margin-bottom:10px}h2{font-size:26px;font-weight:500;letter-spacing:.025em;line-height:1.5;margin:0}.section-note{font-size:12px;color:var(--muted);margin:0 0 4px;white-space:nowrap}.catalog-tools{display:flex;gap:22px;align-items:start;padding:17px 0;border-block:1px solid var(--line)}.chapter-filters{display:flex;gap:6px;flex-wrap:wrap;flex:1;min-width:0}.chapter-filters button{border:1px solid transparent;background:transparent;color:#98afbd;padding:9px 12px;border-radius:5px;min-height:40px;font-size:12px;white-space:nowrap}.chapter-filters button[aria-pressed=true]{color:#e1edf3;background:#253d4b;border-color:#405f70}.chapter-filters button:hover{color:#e8f2f7;background:#162b39}.search-field{display:flex;align-items:center;gap:9px;flex:0 0 225px;border:1px solid #2d4656;border-radius:5px;padding:0 12px;color:#85a6b9;min-height:41px}.search-field span{font-size:25px}.search-field input{min-width:0;width:100%;color:#e2edf2;font-size:12px;padding:9px 0;border:0;background:transparent;outline-offset:8px}.search-field input::placeholder{color:#7f99aa}.catalog-meta{display:flex;justify-content:space-between;align-items:center;margin-block:18px 26px;font-size:11px;color:var(--muted)}.catalog-meta p{margin:0}.quality-choice{display:flex;align-items:center;gap:8px}.quality-choice select{color:#b4cbd7;background:var(--bg);border:1px solid #304957;border-radius:5px;min-height:35px;padding:5px 25px 5px 9px;font-size:11px}.chapter-group{margin-bottom:40px}.chapter-heading{display:flex;align-items:center;gap:14px;font-size:18px;font-weight:500;margin:0 0 17px;letter-spacing:.04em}.chapter-heading span{font-size:11px;letter-spacing:.07em;color:var(--muted);font-weight:400}.experiment-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:21px}.experiment-card{display:block;min-width:0;overflow:hidden;background:var(--panel);border:1px solid #233744;border-radius:9px;transition:border-color .18s,transform .18s}.experiment-card:hover{border-color:#648696;transform:translateY(-3px)}.card-visual{position:relative;background:#080f17;aspect-ratio:1.58;overflow:hidden}.card-visual img{width:100%;height:100%;display:block;object-fit:cover;transition:transform .35s}.experiment-card:hover img{transform:scale(1.035)}.card-enter{position:absolute;right:12px;bottom:12px;font-size:11px;letter-spacing:.025em;padding:7px 11px;border-radius:4px;background:#0b1924d9;color:#c5dce8;border:1px solid #416071;opacity:0;transition:opacity .2s}.experiment-card:hover .card-enter,.experiment-card:focus-visible .card-enter{opacity:1}.card-copy{padding:21px 21px 23px}.card-kind{color:var(--brass);font-size:10px;letter-spacing:.08em;margin:0 0 9px}h4{font-weight:500;font-size:18px;line-height:1.5;margin:0 0 10px;overflow-wrap:anywhere}.card-objective{font-size:12px;line-height:1.8;color:#8ea7b8;margin:0}.empty-state{padding:50px 20px 65px;text-align:center;color:var(--muted)}.empty-state h3{color:var(--ink);font-size:20px;font-weight:500}.empty-state p{font-size:13px;margin-bottom:24px}.offline-section{display:grid;grid-template-columns:80px minmax(0,1fr);gap:28px;border:1px solid #304956;border-radius:10px;padding:34px 38px;background:#11212d;margin-block:18px 56px}.offline-mark{border:1px solid #526c7b;border-radius:16px;display:grid;place-items:center;width:66px;height:70px;font-size:38px;color:var(--ice);font-weight:200}.offline-copy .eyebrow{margin-bottom:8px;color:var(--brass)}.offline-copy h2{font-size:24px}.offline-copy>p{color:#a7bfcd;font-size:13px;line-height:1.85;max-width:750px}.offline-copy>p.offline-detail{font-size:11px;color:#809cab}.offline-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}#offline-progress{width:min(100%,600px);height:8px;display:block;margin-top:22px;accent-color:var(--ice)}.offline-copy>p.offline-status{font-size:11px;color:#a6becc;margin-bottom:0;min-height:1.8em}.install-help{color:#88a4b4;font-size:11px;margin-top:14px;max-width:700px;line-height:1.9}.install-help summary{cursor:pointer;padding-block:7px;min-height:32px}.install-help p{padding-left:13px}.updates-section{display:grid;grid-template-columns:1fr 1.5fr;gap:45px;padding-block:0 55px}.updates-section .eyebrow{margin-bottom:8px}.updates-section h2{font-size:23px}.update-item{border-top:1px solid var(--line);padding-top:18px;display:grid;grid-template-columns:90px minmax(0,1fr);gap:18px}.update-item time{font-size:11px;line-height:1.8;color:var(--brass);font-variant-numeric:tabular-nums}.update-item p{margin:0;font-size:12px;line-height:1.9;color:#9fb6c5}.site-footer{padding-block:27px 35px;border-top:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;gap:20px;color:#7290a3;font-size:11px;line-height:1.7}.site-footer p{margin:0}.footer-brand{color:#b3c9d6;font-size:14px}.site-footer>div{display:flex;gap:24px}.site-footer a:hover{color:var(--ice)}.pwa-update{position:fixed;bottom:20px;right:20px;z-index:150;max-width:calc(100vw - 40px);padding:14px 18px;display:flex;align-items:center;gap:20px;color:#dbe8ef;background:#173141;border:1px solid #6f94a7;border-radius:9px;box-shadow:0 10px 40px #0006;font:12px/1.7 Segoe UI,Microsoft YaHei,sans-serif}.pwa-update button{border:1px solid #7fa6b9;border-radius:5px;padding:8px 12px;background:#c0dbe5;color:#162b38;font:inherit;white-space:nowrap}@media(max-width:1100px){.wrap{width:calc(100% - 56px)}.hero{gap:28px;grid-template-columns:1fr 1.1fr;padding-block:50px 58px}h1{font-size:48px}.site-header nav{gap:22px}.catalog-tools{flex-direction:column;gap:13px}.search-field{flex:0 0 auto;width:100%;max-width:340px}.experiment-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.updates-section{grid-template-columns:1fr 1.6fr}}@media(max-width:720px){.wrap{width:calc(100% - 36px)}.site-header{min-height:78px;gap:12px}.brand{font-size:17px;gap:9px}.brand img{width:32px;height:32px}.site-header nav{gap:14px;font-size:11px}.site-header nav a:last-child{display:none}.hero{grid-template-columns:1fr;gap:30px;padding-block:37px 45px}.hero-copy{max-width:580px}.hero-copy>.eyebrow{font-size:10px;margin-bottom:17px}h1{font-size:44px;line-height:1.35;margin-bottom:18px}.hero-intro{font-size:13px;line-height:1.9}.hero-actions{margin-top:25px;gap:10px}.button{font-size:12px;min-height:44px;padding:11px 16px;gap:14px}.hero-footnote{margin-top:17px;font-size:10px}.hero-scene{min-height:0;aspect-ratio:1.6}.scene-caption{left:19px;right:18px;bottom:18px}.scene-caption small{font-size:10px;margin-bottom:5px}.scene-caption strong{font-size:16px}.scene-enter{width:34px;height:34px;font-size:19px}.section-heading{display:block;margin-bottom:20px}.section-heading .eyebrow{font-size:10px;margin-bottom:7px}h2{font-size:22px}.section-note{margin-top:10px;font-size:11px}.catalog-tools{padding-block:12px;gap:14px}.chapter-filters{gap:3px;width:100%}.chapter-filters button{font-size:11px;padding:8px 10px;min-height:38px}.search-field{max-width:none;min-height:42px}.catalog-meta{margin-block:15px 23px}.chapter-heading{font-size:17px;gap:12px;margin-bottom:14px}.experiment-grid{gap:14px}.card-copy{padding:16px 15px 18px}h4{font-size:16px;line-height:1.5}.card-objective{font-size:11px;line-height:1.8}.card-kind{font-size:9px}.card-enter{opacity:1;padding:5px 8px;right:9px;bottom:9px;font-size:10px}.chapter-group{margin-bottom:29px}.offline-section{grid-template-columns:1fr;gap:20px;padding:25px 23px;margin-block:10px 38px}.offline-mark{width:49px;height:52px;border-radius:12px;font-size:28px}.offline-copy h2{font-size:22px}.offline-copy>p{font-size:12px}.offline-copy .eyebrow{font-size:10px}.updates-section{grid-template-columns:1fr;gap:22px;padding-bottom:35px}.updates-section h2{font-size:22px}.updates-section .eyebrow{font-size:10px}.update-item{grid-template-columns:80px minmax(0,1fr);gap:15px}.site-footer{flex-wrap:wrap;justify-content:start;gap:12px 20px;padding-block:23px 30px}.site-footer>div{width:100%;gap:22px}}@media(max-width:420px){h1{font-size:40px}.site-header nav{gap:11px}.site-header nav a:nth-child(2){display:none}.experiment-grid{grid-template-columns:1fr}.card-copy{padding:18px}.card-kind{font-size:10px}h4{font-size:18px}.card-objective{font-size:12px}.hero-actions{align-items:start}.hero-footnote{font-size:10px}.offline-section{padding:24px 19px}.update-item{grid-template-columns:1fr;gap:5px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition:none!important;animation:none!important}}
