:root{color-scheme:light;--orange:#f04416;--orange-soft:#fff0eb;--ink:#1f2328;--muted:#70757a;--paper:rgba(255,255,255,.94);--line:#e7e5e2}
*{box-sizing:border-box}
html,body{width:100%;height:100%;margin:0;overflow:hidden;background:#f4f4f2;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink)}
button{font:inherit}
.vr-shell{position:relative;width:100%;height:100%;height:100dvh;overflow:hidden;background:#eef0f1;isolation:isolate}
.poster,.shade,#vr-canvas{position:absolute;inset:0;width:100%;height:100%}
.poster{background:url("assets/preview.jpg") center/cover no-repeat;transform:scale(1.03);filter:saturate(.94) brightness(1.03)}
#vr-canvas{display:block;touch-action:none;cursor:grab;opacity:0;transition:opacity .7s ease}
#vr-canvas.ready{opacity:1}#vr-canvas:active{cursor:grabbing}
.shade{pointer-events:none;background:linear-gradient(180deg,rgba(20,25,30,.17) 0%,transparent 24%,transparent 62%,rgba(20,25,30,.24) 100%)}
.topbar{position:absolute;z-index:3;top:0;left:0;right:0;display:flex;align-items:center;justify-content:space-between;padding:calc(18px + env(safe-area-inset-top)) max(18px,4vw) 16px}
.brand-logo{display:block;width:clamp(182px,26vw,280px);height:auto;padding:10px 14px;border:1px solid rgba(231,229,226,.95);border-radius:8px;background:var(--paper);box-shadow:0 8px 28px rgba(31,35,40,.12)}
.mode-pill{display:flex;align-items:center;gap:8px;padding:9px 13px;border:1px solid var(--line);border-radius:999px;background:var(--paper);box-shadow:0 8px 28px rgba(31,35,40,.1);backdrop-filter:blur(14px);color:var(--ink);font-size:12px;font-weight:700;letter-spacing:.08em}
.mode-pill i{width:7px;height:7px;border-radius:50%;background:var(--orange);box-shadow:0 0 0 4px rgba(240,68,22,.14)}
.intro{position:absolute;z-index:3;left:max(18px,4vw);bottom:calc(112px + env(safe-area-inset-bottom));width:max-content;max-width:min(490px,68vw);padding:14px 17px 15px;border:1px solid rgba(231,229,226,.98);border-top:4px solid var(--orange);border-radius:8px;background:var(--paper);box-shadow:0 18px 48px rgba(31,35,40,.16);backdrop-filter:blur(15px);pointer-events:none}
.eyebrow{margin:0 0 5px;color:var(--orange);font-size:11px;font-weight:800;letter-spacing:.15em}
.intro h1{margin:0;color:var(--ink);font-size:clamp(25px,3.7vw,43px);line-height:1.1;letter-spacing:-.035em;white-space:nowrap}
.scene-caption{margin:6px 0 0;color:#30353a;font-size:14px;font-weight:700}.view-hint{display:flex;align-items:center;gap:8px;margin:6px 0 0;color:var(--muted);font-size:12px;white-space:nowrap}
.drag-icon{display:grid;place-items:center;width:24px;height:24px;border:1px solid rgba(240,68,22,.38);border-radius:50%;background:var(--orange-soft);color:var(--orange);font-weight:800}
.loading{position:absolute;z-index:7;inset:50% auto auto 50%;transform:translate(-50%,-50%);display:grid;justify-items:center;gap:8px;padding:22px 28px;border:1px solid var(--line);border-top:4px solid var(--orange);border-radius:10px;background:rgba(255,255,255,.96);box-shadow:0 18px 54px rgba(31,35,40,.16);backdrop-filter:blur(15px);transition:opacity .3s ease,visibility .3s ease;white-space:nowrap}
.loading.hidden{opacity:0;visibility:hidden}.loading strong{font-size:15px}.loading small{color:var(--muted);font-size:12px}.loader{width:30px;height:30px;border:3px solid #ece9e6;border-top-color:var(--orange);border-radius:50%;animation:spin .8s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}
.scene-switcher{position:absolute;z-index:5;left:50%;bottom:calc(22px + env(safe-area-inset-bottom));transform:translateX(-50%);display:flex;gap:8px;padding:7px;border:1px solid var(--line);border-top:3px solid var(--orange);border-radius:9px;background:var(--paper);box-shadow:0 13px 36px rgba(31,35,40,.14);backdrop-filter:blur(16px)}
.scene-button{display:flex;align-items:center;gap:9px;min-width:128px;padding:6px 10px 6px 6px;border:1px solid transparent;border-radius:6px;background:transparent;color:var(--ink);text-align:left;cursor:pointer;transition:.2s}.scene-button:hover,.scene-button:focus-visible{outline:none;background:#f5f4f2}.scene-button.active{border-color:rgba(240,68,22,.42);background:var(--orange-soft)}
.scene-button>span:last-child{display:grid;gap:2px}.scene-button b{font-size:12px;color:var(--orange)}.scene-button small{font-size:12px;white-space:nowrap}.thumb{width:52px;height:38px;flex:none;border-radius:5px;background-position:center;background-size:cover}.thumb-1{background-image:url("assets/scene-01.jpg")}.thumb-2{background-image:url("assets/scene-02.jpg")}.thumb-3{background-image:url("assets/scene-03.jpg")}
.vr-controls{position:absolute;z-index:5;right:max(14px,3vw);bottom:calc(22px + env(safe-area-inset-bottom));display:flex;gap:4px;padding:7px;border:1px solid var(--line);border-radius:9px;background:var(--paper);box-shadow:0 13px 36px rgba(31,35,40,.14);backdrop-filter:blur(16px)}
.vr-controls button{display:grid;place-items:center;gap:4px;min-width:54px;height:52px;padding:4px 8px;border:0;border-radius:6px;background:transparent;color:#4e555b;cursor:pointer}.vr-controls button:hover,.vr-controls button:focus-visible,.vr-controls button[aria-pressed="true"]{outline:none;background:var(--orange-soft);color:var(--orange)}.vr-controls svg{width:21px;height:21px;fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}.vr-controls span{font-size:11px}
.info-panel{position:absolute;z-index:8;right:max(16px,4vw);top:50%;width:min(360px,calc(100vw - 32px));padding:22px;border:1px solid var(--line);border-top:4px solid var(--orange);border-radius:9px;background:rgba(255,255,255,.97);box-shadow:0 20px 72px rgba(31,35,40,.2);backdrop-filter:blur(22px);transform:translate(115%,-50%);opacity:0;transition:transform .35s ease,opacity .35s ease}.info-panel.open{transform:translate(0,-50%);opacity:1}.close-info{position:absolute;right:10px;top:8px;width:36px;height:36px;border:0;background:transparent;color:#3d4247;font-size:26px;cursor:pointer}.panel-kicker{margin:0 0 6px;color:var(--orange);font-size:12px;font-weight:800;letter-spacing:.14em}.info-panel h2{margin:0 32px 11px 0;color:var(--ink);font-size:22px}.info-panel>p:not(.panel-kicker){margin:0;color:var(--muted);font-size:14px;line-height:1.65}
.aerial-card{position:relative;margin:14px 0 0;overflow:hidden;border-radius:7px;background:#f0efed}.aerial-card img{display:block;width:100%;aspect-ratio:16/7.5;object-fit:cover}.aerial-card figcaption{position:absolute;right:8px;bottom:7px;padding:4px 7px;border-radius:999px;background:rgba(255,255,255,.9);box-shadow:0 3px 10px rgba(31,35,40,.12);color:#363b40;font-size:11px}
.keyword{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:14px;padding:13px 15px;background:#f5f4f2;border-left:3px solid var(--orange)}.keyword span{color:var(--muted);font-size:12px}.keyword strong{color:var(--ink);font-size:15px}
.video-layer{position:absolute;z-index:9;inset:0;display:grid;place-items:center;padding:24px;background:rgba(18,22,26,.58);backdrop-filter:blur(7px);opacity:0;visibility:hidden;pointer-events:none;transition:opacity .28s ease,visibility .28s ease}.video-layer.open{opacity:1;visibility:visible;pointer-events:auto}.video-card{position:relative;width:min(820px,calc(100vw - 48px));padding:22px;border:1px solid var(--line);border-top:4px solid var(--orange);border-radius:10px;background:#fff;box-shadow:0 28px 90px rgba(10,14,18,.3)}.video-card h2{margin:0 44px 13px 0;font-size:24px}.close-video{position:absolute;right:10px;top:7px;width:38px;height:38px;border:0;background:transparent;color:#3d4247;font-size:28px;cursor:pointer}.video-tabs{display:flex;gap:8px;margin:0 0 12px}.video-tab{display:flex;align-items:center;gap:7px;padding:8px 12px;border:1px solid var(--line);border-radius:6px;background:#f7f6f4;color:#4e555b;font-size:13px;font-weight:700;cursor:pointer}.video-tab b{color:var(--orange)}.video-tab.active,.video-tab:hover,.video-tab:focus-visible{outline:none;border-color:rgba(240,68,22,.45);background:var(--orange-soft);color:var(--ink)}#aerial-video{display:block;width:100%;aspect-ratio:16/9;border-radius:7px;background:#111;object-fit:contain}.video-note{margin:11px 0 0;color:var(--muted);font-size:13px;line-height:1.55}
.toast{position:absolute;z-index:10;left:50%;bottom:112px;transform:translate(-50%,15px);padding:10px 16px;border:1px solid var(--line);border-left:3px solid var(--orange);border-radius:7px;background:rgba(255,255,255,.96);box-shadow:0 12px 32px rgba(31,35,40,.14);color:var(--ink);font-size:13px;opacity:0;visibility:hidden;transition:.25s;white-space:nowrap}.toast.show{opacity:1;visibility:visible;transform:translate(-50%,0)}
@media(max-width:980px){.topbar{padding-top:calc(14px + env(safe-area-inset-top))}.brand-logo{width:210px;padding:8px 11px}.mode-pill{padding:8px 11px}.intro{bottom:calc(88px + env(safe-area-inset-bottom));width:max-content;max-width:min(400px,55vw);padding:11px 14px 12px}.intro h1{font-size:31px}.eyebrow{margin-bottom:4px}.scene-caption{margin-top:5px}.view-hint{margin-top:5px}.scene-switcher{bottom:calc(14px + env(safe-area-inset-bottom));gap:5px;padding:5px}.scene-button{min-width:108px;padding:4px 7px 4px 4px}.thumb{width:44px;height:32px}.vr-controls{bottom:calc(14px + env(safe-area-inset-bottom));padding:5px}.vr-controls button{min-width:49px;height:46px;padding:3px 6px}.vr-controls svg{width:19px;height:19px}.info-panel{right:max(14px,3vw)}}
@media(max-width:900px){.scene-switcher{left:14px;transform:none}.scene-button{min-width:0}.scene-button small{display:none}}
@media(max-width:720px){.topbar{padding-left:12px;padding-right:12px}.brand-logo{width:156px;padding:7px 9px}.mode-pill{padding:7px 9px;font-size:10px}.intro{left:12px;top:calc(76px + env(safe-area-inset-top));bottom:auto;width:max-content;max-width:calc(100% - 24px);padding:9px 11px 10px;transition:opacity .25s ease,visibility .25s ease}.info-open .intro,.video-open .intro{opacity:0;visibility:hidden}.intro h1{font-size:23px}.eyebrow{font-size:10px}.scene-caption{font-size:12px}.view-hint{font-size:11px;margin-top:5px}.drag-icon{width:21px;height:21px}.scene-switcher{left:12px;right:12px;bottom:calc(70px + env(safe-area-inset-bottom));justify-content:space-between}.scene-button{flex:1;justify-content:center;padding:4px}.thumb{width:45px;height:32px}.vr-controls{left:50%;right:auto;bottom:calc(12px + env(safe-area-inset-bottom));transform:translateX(-50%);gap:0;width:calc(100% - 24px);justify-content:space-around}.vr-controls button{flex:1;min-width:0;height:45px}.info-panel{right:12px;bottom:calc(70px + env(safe-area-inset-bottom));width:calc(100vw - 24px);padding:20px;transform:translateY(120%);max-height:calc(100dvh - 96px);overflow:auto}.info-panel.open{transform:translateY(0)}.video-layer{padding:12px}.video-card{width:100%;padding:18px 14px 15px}.video-card h2{font-size:21px;margin-bottom:10px}.video-tabs{margin-bottom:10px}.video-tab{flex:1;justify-content:center;padding:8px 7px}.video-note{font-size:12px;margin-top:8px}}
@media(max-width:390px){.thumb{width:44px;height:32px}.intro{top:calc(82px + env(safe-area-inset-top))}.view-hint{display:none}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation-duration:.001ms!important;transition-duration:.001ms!important}}