:root{--ptv-bg:#f4f6fb;--ptv-card:#fff;--ptv-text:#171b29;--ptv-muted:#657086;--ptv-line:#dfe4ef;--ptv-soft:#e9e6ff;--ptv-accent:#6657e8;--ptv-accent2:#8f7cf6;--ptv-shadow:0 14px 34px rgba(43,50,78,.09)}
html[data-theme="dark"],.dark{--ptv-bg:#0d1017;--ptv-card:#151a23;--ptv-text:#f4f6fb;--ptv-muted:#a9b2c2;--ptv-line:#2a3240;--ptv-soft:#26223d;--ptv-accent:#9f8cff;--ptv-accent2:#7664e8;--ptv-shadow:none}
*{box-sizing:border-box}body{margin:0;background:var(--ptv-bg);color:var(--ptv-text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}.ptv-page{overflow:hidden}.ptv-shell{width:min(1240px,calc(100% - 32px));margin:auto}.ptv-kicker{margin:0;font-size:12px;letter-spacing:.19em;font-weight:850;color:var(--ptv-accent);text-transform:uppercase}
.ptv-hero{padding:34px 0 28px;background:linear-gradient(135deg,#ebe8ff 0 52%,#f2f4ff 52%);border-bottom:1px solid var(--ptv-line)}html[data-theme="dark"] .ptv-hero,.dark .ptv-hero{background:linear-gradient(135deg,#171329 0 52%,#111722 52%)}.ptv-hero-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:center}.ptv-hero h1{font-size:clamp(42px,5.6vw,76px);line-height:.94;letter-spacing:-.055em;margin:14px 0}.ptv-hero h1 span{color:var(--ptv-accent)}.ptv-lede{max-width:58ch;color:var(--ptv-muted);font-size:17px;line-height:1.7;margin:0}.ptv-actions{display:flex;gap:12px;flex-wrap:wrap;margin:22px 0 18px}.ptv-btn{display:inline-flex;align-items:center;justify-content:center;min-height:46px;padding:0 18px;border-radius:999px;font-weight:800;text-decoration:none}.ptv-primary{background:var(--ptv-text);color:var(--ptv-card)}.ptv-ghost{border:1px solid var(--ptv-line);color:var(--ptv-text);background:rgba(255,255,255,.34)}html[data-theme="dark"] .ptv-ghost,.dark .ptv-ghost{background:rgba(255,255,255,.03)}.ptv-hero-notes{display:flex;flex-wrap:wrap;gap:10px;color:var(--ptv-muted);font-size:12px}.ptv-hero-notes span{padding:7px 10px;border:1px solid var(--ptv-line);border-radius:999px;background:rgba(255,255,255,.4)}html[data-theme="dark"] .ptv-hero-notes span,.dark .ptv-hero-notes span{background:rgba(255,255,255,.03)}
.ptv-hero-visual{display:grid;gap:12px}.ptv-hero-video-wrap{position:relative;aspect-ratio:16/10;border-radius:24px;overflow:hidden;background:#10121a;box-shadow:var(--ptv-shadow);border:1px solid var(--ptv-line)}.ptv-hero-video-wrap>video{width:100%;height:100%;object-fit:cover;display:block}.ptv-hero-video-wrap:after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 55%,rgba(0,0,0,.65));pointer-events:none}.ptv-hero-source{position:absolute;left:14px;bottom:14px;width:92px;height:92px;border:3px solid #fff;border-radius:14px;overflow:hidden;z-index:2;box-shadow:0 8px 24px rgba(0,0,0,.22)}.ptv-hero-source img{width:100%;height:100%;object-fit:cover}.ptv-hero-source small{position:absolute;left:6px;bottom:5px;background:rgba(0,0,0,.58);color:#fff;padding:3px 5px;border-radius:4px;font-size:9px;font-weight:800}.ptv-hero-label{position:absolute;right:16px;bottom:16px;z-index:2;text-align:right;color:#fff;display:grid;gap:3px}.ptv-hero-label span{font-size:10px;letter-spacing:.14em;font-weight:800}.ptv-hero-label b{font-size:16px}.ptv-hero-tabs{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px}.ptv-hero-tabs button{border:1px solid var(--ptv-line);border-radius:14px;background:var(--ptv-card);color:var(--ptv-text);padding:10px;text-align:left;cursor:pointer}.ptv-hero-tabs button b{display:block;font-size:12px}.ptv-hero-tabs button span{font-size:10px;color:var(--ptv-muted)}.ptv-hero-tabs button.active{outline:2px solid var(--ptv-accent)}
.ptv-studio,.ptv-inspiration,.ptv-scenarios,.ptv-geo,.ptv-faq{padding:34px 0}.ptv-section-head{display:flex;justify-content:space-between;gap:24px;align-items:end;margin-bottom:20px}.ptv-section-head.compact{display:grid;gap:8px;max-width:760px}.ptv-section-head h2{margin:0;font-size:clamp(28px,4vw,46px);letter-spacing:-.04em;line-height:1}.ptv-section-head>p:last-child{max-width:560px;margin:0;color:var(--ptv-muted);line-height:1.6}.ptv-workbench{display:grid;grid-template-columns:.92fr 1.08fr;gap:16px}.ptv-panel,.ptv-result{background:var(--ptv-card);border:1px solid var(--ptv-line);border-radius:18px;box-shadow:var(--ptv-shadow);padding:18px}.ptv-panel-head{display:flex;justify-content:space-between;gap:12px;align-items:start;margin-bottom:12px}.ptv-panel-head span,.ptv-result-head span{font-size:10px;letter-spacing:.12em;font-weight:850;color:var(--ptv-muted)}.ptv-panel-head h3,.ptv-result-head h3{margin:3px 0 0;font-size:20px}.ptv-panel-head button{border:1px solid var(--ptv-line);background:transparent;color:var(--ptv-text);border-radius:10px;padding:7px 10px;font:inherit;font-weight:700;cursor:pointer}.ptv-drop{min-height:340px;border:2px dashed #c7cce0;border-radius:16px;background:linear-gradient(180deg,var(--ptv-soft),transparent);display:grid;place-items:center;padding:14px;position:relative;cursor:pointer}.ptv-drop input{display:none}.ptv-drop-empty{text-align:center;color:var(--ptv-muted);display:grid;gap:6px}.ptv-drop-empty b{font-size:18px;color:var(--ptv-text)}.ptv-ref-grid{width:100%;display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.ptv-ref-grid:empty{display:none}.t67-vscene-ref{position:relative;aspect-ratio:3/4;border-radius:12px;overflow:hidden;background:#111}.t67-vscene-ref img{width:100%;height:100%;object-fit:cover}.t67-vscene-ref i{position:absolute;left:6px;top:6px;width:22px;height:22px;border-radius:50%;background:rgba(0,0,0,.7);color:#fff;display:grid;place-items:center;font-style:normal;font-size:11px}.ptv-upload-meta{margin-top:9px;color:var(--ptv-muted);font-size:12px}.ptv-field{display:grid;gap:6px}.ptv-field>span{font-size:10px;letter-spacing:.1em;text-transform:uppercase;font-weight:850;color:var(--ptv-muted)}.ptv-field textarea,.ptv-field select{width:100%;border:1px solid var(--ptv-line);background:var(--ptv-bg);color:var(--ptv-text);border-radius:12px;font:inherit}.ptv-field textarea{padding:12px;min-height:144px;resize:vertical;line-height:1.6}.ptv-field select{height:40px;padding:0 10px;font-size:12px}.ptv-control-row{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:8px;margin-top:12px}.ptv-model-info{font-size:12px;line-height:1.55;color:var(--ptv-muted);margin:11px 0 0}.ptv-generate{width:100%;margin-top:12px;min-height:47px;border:0;border-radius:12px;background:var(--ptv-text);color:var(--ptv-card);font:inherit;font-weight:850;cursor:pointer}.ptv-credit{display:grid;gap:4px;margin-top:9px;font-size:13px}.ptv-credit span{color:var(--ptv-muted)}.ptv-credit a{color:var(--ptv-accent)}.ptv-result{grid-column:1/-1}.ptv-result-head{margin-bottom:10px}.ptv-result-stage{position:relative;min-height:260px;max-height:450px;border-radius:14px;background:#05060a;display:grid;place-items:center;overflow:hidden}.ptv-result-stage video{width:100%;max-height:450px;object-fit:contain;background:#000}.ptv-busy{position:absolute;inset:0;background:rgba(0,0,0,.72);color:#fff;display:grid;place-items:center;gap:10px;text-align:center}.ptv-spinner{width:42px;height:42px;border:4px solid rgba(255,255,255,.2);border-top-color:#fff;border-radius:50%;animation:ptvspin 1s linear infinite}@keyframes ptvspin{to{transform:rotate(360deg)}}.ptv-download{position:absolute;right:14px;bottom:14px;width:42px;height:42px;border-radius:50%;background:rgba(0,0,0,.72);color:#fff;display:grid;place-items:center;font-size:24px;z-index:3;text-decoration:none}
.ptv-inspiration{background:linear-gradient(180deg,var(--ptv-bg),var(--ptv-soft))}.ptv-card-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:16px}.ptv-card{background:var(--ptv-card);border:1px solid var(--ptv-line);border-radius:16px;overflow:hidden;box-shadow:var(--ptv-shadow)}.ptv-card-media{position:relative;aspect-ratio:1;background:#e9ebf1}.ptv-card-media>img,.ptv-card-media>video{width:100%;height:100%;object-fit:cover;display:block}.ptv-card-media>video{position:absolute;inset:0}.ptv-thumb{position:absolute;left:10px;bottom:10px;width:72px;height:72px;border:3px solid #fff;border-radius:12px;overflow:hidden;z-index:3;box-shadow:0 5px 16px rgba(0,0,0,.25)}.ptv-thumb img{width:100%;height:100%;object-fit:cover}.ptv-card-copy{padding:12px 13px 14px}.ptv-card-copy p{margin:0;color:var(--ptv-muted);line-height:1.45;font-size:13px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.ptv-card-copy button{margin-top:10px;border:0;background:transparent;color:var(--ptv-accent);font-weight:800;padding:0;cursor:pointer}.ptv-load-more{display:block;margin:22px auto 0;border:1px solid var(--ptv-line);border-radius:999px;background:var(--ptv-card);color:var(--ptv-text);font:inherit;font-weight:800;padding:11px 18px;cursor:pointer}
.ptv-scenarios{background:var(--ptv-soft)}.ptv-scenario-list{display:grid;gap:28px}.ptv-scenario{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}.ptv-scenario:nth-child(even) .ptv-scenario-copy{order:2}.ptv-scenario-copy h3{font-size:28px;margin:0 0 10px}.ptv-scenario-copy p{margin:0;color:var(--ptv-muted);line-height:1.7}.ptv-scenario-media{display:flex;align-items:end;justify-content:center;gap:10px}.ptv-scenario-source{width:90px;height:90px;border-radius:12px;overflow:hidden;border:2px solid var(--ptv-card);box-shadow:var(--ptv-shadow)}.ptv-scenario-source img{width:100%;height:100%;object-fit:cover}.ptv-scenario-main{width:min(100%,350px);aspect-ratio:1;border-radius:18px;overflow:hidden;background:#111;box-shadow:var(--ptv-shadow)}.ptv-scenario-main img,.ptv-scenario-main video{width:100%;height:100%;object-fit:cover}.ptv-geo-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:36px;align-items:start;border-top:1px solid var(--ptv-line);padding-top:26px}.ptv-geo h2{font-size:clamp(28px,4vw,44px);margin:8px 0 0}.ptv-geo-grid>p{margin:0;color:var(--ptv-muted);line-height:1.75}.ptv-faq-grid{display:grid;grid-template-columns:1fr 1fr;gap:10px}.ptv-faq details{border:1px solid var(--ptv-line);background:var(--ptv-card);border-radius:14px;padding:0 16px}.ptv-faq summary{cursor:pointer;list-style:none;font-weight:800;padding:16px 0}.ptv-faq p{margin:0 0 16px;color:var(--ptv-muted);line-height:1.65}.footer{background:var(--ptv-card)!important;color:var(--ptv-text)!important}.footer a{color:var(--ptv-muted)!important}.footer-desc{color:var(--ptv-muted)!important}
@media(max-width:980px){.ptv-hero-grid,.ptv-workbench,.ptv-geo-grid{grid-template-columns:1fr}.ptv-card-grid{grid-template-columns:repeat(2,1fr)}.ptv-control-row{grid-template-columns:repeat(2,1fr)}.ptv-hero-visual{margin-top:4px}.ptv-scenario{gap:24px}}
@media(max-width:680px){.ptv-shell{width:min(100% - 22px,1240px)}.ptv-hero{padding-top:24px}.ptv-hero h1{font-size:48px}.ptv-hero-tabs{grid-template-columns:repeat(2,1fr)}.ptv-hero-video-wrap{aspect-ratio:4/3}.ptv-card-grid{grid-template-columns:repeat(2,1fr);gap:8px}.ptv-card-copy{padding:10px}.ptv-thumb{width:58px;height:58px}.ptv-scenario{grid-template-columns:1fr}.ptv-scenario:nth-child(even) .ptv-scenario-copy{order:0}.ptv-scenario-copy{text-align:left}.ptv-scenario-media{justify-content:flex-start}.ptv-scenario-source{width:72px;height:72px}.ptv-scenario-main{width:calc(100% - 84px)}.ptv-faq-grid{grid-template-columns:1fr}.ptv-section-head{display:grid;gap:8px}.ptv-drop{min-height:260px}}


/* 2026-08-07 depth & visual polish */
:root{
  --ptv-elev-1:0 8px 22px rgba(56,64,110,.08),0 2px 7px rgba(42,48,82,.04);
  --ptv-elev-2:0 18px 46px rgba(56,64,110,.13),0 5px 14px rgba(42,48,82,.07);
  --ptv-elev-3:0 28px 70px rgba(37,43,82,.18),0 8px 22px rgba(37,43,82,.08);
}
html[data-theme="dark"],.dark{
  --ptv-elev-1:0 10px 24px rgba(0,0,0,.20),0 1px 0 rgba(255,255,255,.03) inset;
  --ptv-elev-2:0 20px 50px rgba(0,0,0,.32),0 1px 0 rgba(255,255,255,.04) inset;
  --ptv-elev-3:0 30px 80px rgba(0,0,0,.42),0 1px 0 rgba(255,255,255,.05) inset;
}
.ptv-hero{position:relative;isolation:isolate}
.ptv-hero:before,.ptv-hero:after{content:"";position:absolute;z-index:-1;pointer-events:none;border-radius:50%;filter:blur(2px)}
.ptv-hero:before{width:420px;height:420px;right:7%;top:-180px;background:radial-gradient(circle,rgba(98,105,255,.18),rgba(98,105,255,0) 68%)}
.ptv-hero:after{width:340px;height:340px;left:12%;bottom:-170px;background:radial-gradient(circle,rgba(175,116,255,.12),rgba(175,116,255,0) 70%)}
.ptv-hero-video-wrap{box-shadow:var(--ptv-elev-3);transform:translateZ(0);border-color:color-mix(in srgb,var(--ptv-line) 70%,white 30%)}
.ptv-hero-source{box-shadow:0 13px 30px rgba(0,0,0,.28);transform:translateY(-1px)}
.ptv-hero-tabs button{box-shadow:var(--ptv-elev-1);transition:transform .2s ease,box-shadow .2s ease,border-color .2s ease}
.ptv-hero-tabs button:hover{transform:translateY(-2px);box-shadow:var(--ptv-elev-2)}
.ptv-hero-tabs button.active{box-shadow:0 10px 28px rgba(92,101,255,.17)}
.ptv-studio{background:linear-gradient(180deg,var(--ptv-bg) 0%,color-mix(in srgb,var(--ptv-bg) 93%,var(--ptv-soft) 7%) 100%)}
.ptv-panel,.ptv-result{box-shadow:var(--ptv-elev-2);border-color:color-mix(in srgb,var(--ptv-line) 82%,white 18%)}
.ptv-drop{box-shadow:inset 0 1px 0 rgba(255,255,255,.55);transition:border-color .2s ease,transform .2s ease,box-shadow .2s ease}
.ptv-drop:hover{border-color:color-mix(in srgb,var(--ptv-accent) 48%,var(--ptv-line));box-shadow:inset 0 1px 0 rgba(255,255,255,.6),0 10px 24px rgba(75,83,130,.06)}
.ptv-generate{box-shadow:0 10px 24px rgba(28,31,49,.16);transition:transform .18s ease,box-shadow .18s ease}
.ptv-generate:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 14px 30px rgba(28,31,49,.22)}
.ptv-card{box-shadow:var(--ptv-elev-1);transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.ptv-card:hover{transform:translateY(-4px);box-shadow:var(--ptv-elev-2);border-color:color-mix(in srgb,var(--ptv-accent) 25%,var(--ptv-line))}
.ptv-card-media:after{content:"";position:absolute;inset:0;pointer-events:none;box-shadow:inset 0 -42px 54px rgba(14,16,28,.09)}
.ptv-thumb{transition:transform .22s ease}.ptv-card:hover .ptv-thumb{transform:translateY(-2px) scale(1.025)}
.ptv-scenarios{position:relative;background:linear-gradient(180deg,var(--ptv-soft) 0%,color-mix(in srgb,var(--ptv-soft) 88%,var(--ptv-bg) 12%) 100%)}
.ptv-scenario{padding:28px;border:1px solid var(--ptv-line);border-radius:26px;background:color-mix(in srgb,var(--ptv-card) 82%,transparent);box-shadow:var(--ptv-elev-1);backdrop-filter:blur(8px)}
.ptv-scenario-copy{max-width:570px}
.ptv-scenario-copy h3{font-size:clamp(26px,3vw,34px);letter-spacing:-.025em;margin:7px 0 13px}
.ptv-scenario-copy>p:last-child{font-size:15px;line-height:1.85;color:var(--ptv-muted)}
.ptv-scenario-media{position:relative;padding:14px 10px 8px}
.ptv-scenario-main{box-shadow:var(--ptv-elev-3);border:1px solid color-mix(in srgb,var(--ptv-line) 70%,white 30%);transition:transform .25s ease,box-shadow .25s ease}
.ptv-scenario-main:hover{transform:translateY(-4px) rotate(.25deg)}
.ptv-scenario-source{position:relative;z-index:2;box-shadow:0 14px 30px rgba(34,38,68,.20);transform:translate(18px,10px)}
.ptv-geo-grid{padding:30px;border:1px solid var(--ptv-line);border-radius:22px;background:var(--ptv-card);box-shadow:var(--ptv-elev-1)}
.ptv-faq details{box-shadow:0 4px 12px rgba(49,55,92,.035);transition:box-shadow .2s ease,transform .2s ease}
.ptv-faq details:hover{box-shadow:var(--ptv-elev-1);transform:translateY(-1px)}
html[data-theme="dark"] .ptv-drop,.dark .ptv-drop{box-shadow:inset 0 1px 0 rgba(255,255,255,.03)}
html[data-theme="dark"] .ptv-scenario,.dark .ptv-scenario{background:rgba(24,27,39,.78)}
@media(max-width:680px){
  .ptv-scenario{padding:18px;border-radius:20px}
  .ptv-scenario-copy>p:last-child{font-size:14px;line-height:1.75}
  .ptv-scenario-source{transform:translate(10px,6px)}
  .ptv-card:hover{transform:none}
}