:root{font-family:Microsoft YaHei UI,PingFang SC,Segoe UI Variable,Segoe UI,Arial,sans-serif;color:#1f2421;background:#f4f6f3;font-synthesis:none;text-rendering:optimizeLegibility;--bg: #f4f6f3;--surface: #fafbf9;--surface-raised: #ffffff;--surface-subtle: #e9ede9;--text: #1f2421;--text-muted: #626a65;--border: #d9dfda;--border-strong: #c5cdc7;--accent: #14775b;--accent-hover: #0f654c;--accent-soft: #dceee7;--danger: #ad3d3d;--danger-soft: #f7e5e3;--shadow: 0 24px 60px rgba(37, 56, 46, .09);color-scheme:light}:root[data-theme=dark]{--bg: #141815;--surface: #191e1b;--surface-raised: #202622;--surface-subtle: #272e29;--text: #edf2ee;--text-muted: #a8b2ab;--border: #343d37;--border-strong: #48534b;--accent: #66c9a7;--accent-hover: #7bd6b6;--accent-soft: #1f4035;--danger: #f08b84;--danger-soft: #422725;--shadow: 0 24px 60px rgba(0, 0, 0, .24);color-scheme:dark}*{box-sizing:border-box}html{min-width:320px;scroll-behavior:smooth}body{margin:0;min-width:320px;min-height:100dvh;background:var(--bg);color:var(--text)}button,input{font:inherit}button,a{-webkit-tap-highlight-color:transparent}button,a{color:inherit}:focus-visible{outline:3px solid color-mix(in srgb,var(--accent) 42%,transparent);outline-offset:2px}.app-shell{min-height:100dvh;display:grid;grid-template-rows:auto 1fr auto}.topbar{width:min(1180px,calc(100% - 48px));height:72px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--border)}.brand{display:inline-flex;align-items:center;gap:11px;text-decoration:none;font-size:15px;font-weight:720}.brand-mark{width:34px;height:34px;display:grid;place-items:center;border-radius:6px;color:#f7fffb;background:var(--accent)}.icon-button,.input-action{width:40px;height:40px;display:inline-grid;place-items:center;padding:0;border:1px solid var(--border);border-radius:6px;background:var(--surface);cursor:pointer;transition:border-color .16s ease,background-color .16s ease,transform .16s ease}.icon-button:hover,.input-action:hover{border-color:var(--border-strong);background:var(--surface-subtle)}.icon-button:active,.input-action:active,.primary-button:active,.secondary-button:active,.download-button:active,.copy-button:active{transform:translateY(1px)}.icon-button.small{width:34px;height:34px}.workspace{width:min(1180px,calc(100% - 48px));margin:0 auto;padding:clamp(48px,7vw,84px) 0 72px}.intro{max-width:680px;margin-bottom:42px}.eyebrow{margin:0 0 14px;color:var(--accent);font-family:Cascadia Code,SFMono-Regular,Consolas,monospace;font-size:12px;font-weight:700;letter-spacing:.08em}h1,h2,h3,p{margin-top:0}h1{margin-bottom:16px;font-size:clamp(38px,5.5vw,64px);line-height:1.06;letter-spacing:0;font-weight:720}.lede{max-width:500px;margin-bottom:0;color:var(--text-muted);font-size:18px;line-height:1.6}.tool-layout{display:grid;grid-template-columns:minmax(0,.92fr) minmax(0,1.08fr);align-items:stretch;gap:20px}.request-panel,.result-panel{min-width:0;border:1px solid var(--border);border-radius:8px;background:var(--surface-raised);box-shadow:var(--shadow)}.request-panel{padding:26px}.result-panel{display:flex;flex-direction:column;padding:20px}.panel-heading,.result-heading,.endpoint-label,.video-meta,.form-actions,.loading-copy{display:flex;align-items:center;justify-content:space-between;gap:16px}.panel-heading{align-items:flex-start;margin-bottom:30px}.panel-heading>svg{flex:0 0 auto;color:var(--accent)}h2{margin-bottom:7px;font-size:19px;line-height:1.3;letter-spacing:0}.panel-heading p{margin-bottom:0;color:var(--text-muted);font-size:13px;line-height:1.5}.field-group{display:grid;gap:8px;margin-bottom:22px}.field-group label,.endpoint-label>span{font-size:13px;font-weight:680}.input-shell{min-height:48px;display:grid;grid-template-columns:auto minmax(0,1fr) auto;align-items:center;gap:10px;padding:0 7px 0 14px;border:1px solid var(--border-strong);border-radius:6px;background:var(--surface);transition:border-color .16s ease,box-shadow .16s ease}.input-shell:focus-within{border-color:var(--accent);box-shadow:0 0 0 3px color-mix(in srgb,var(--accent) 16%,transparent)}.input-shell>svg{color:var(--text-muted)}.input-shell input{width:100%;min-width:0;height:46px;padding:0;border:0;outline:0;color:var(--text);background:transparent;font-family:Cascadia Code,SFMono-Regular,Consolas,monospace;font-size:13px}.input-shell input::placeholder{color:var(--text-muted);opacity:.82}.input-shell input:disabled{cursor:wait;opacity:.68}.input-action{width:34px;height:34px;border-color:transparent;background:transparent}.field-hint{margin-bottom:0;color:var(--text-muted);font-size:12px;line-height:1.45}.endpoint-block{padding:14px;border-radius:6px;background:var(--surface-subtle)}.endpoint-label{margin-bottom:9px}.copy-button{display:inline-flex;align-items:center;gap:5px;padding:3px;border:0;color:var(--accent);background:transparent;font-size:12px;font-weight:700;cursor:pointer}.endpoint-block code{display:block;overflow-wrap:anywhere;color:var(--text-muted);font-family:Cascadia Code,SFMono-Regular,Consolas,monospace;font-size:11px;line-height:1.6}.message{display:flex;align-items:flex-start;gap:9px;margin-top:16px;padding:12px;border-radius:6px;font-size:13px;line-height:1.5}.message svg{flex:0 0 auto;margin-top:1px}.message span{min-width:0;overflow-wrap:anywhere}.error-message{color:var(--danger);background:var(--danger-soft)}.form-actions{justify-content:flex-start;margin-top:24px}.primary-button,.secondary-button,.download-button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:0 18px;border-radius:6px;font-size:14px;font-weight:720;text-decoration:none;white-space:nowrap;cursor:pointer;transition:background-color .16s ease,border-color .16s ease,transform .16s ease}.primary-button,.download-button{border:1px solid var(--accent);color:#f6fffb;background:var(--accent)}:root[data-theme=dark] .primary-button,:root[data-theme=dark] .download-button{color:#102019}.primary-button:hover,.download-button:hover{border-color:var(--accent-hover);background:var(--accent-hover)}.secondary-button{border:1px solid var(--border-strong);color:var(--text);background:var(--surface)}.secondary-button:hover{background:var(--surface-subtle)}.result-heading{min-height:34px;margin:0 6px 16px}.result-heading h2{margin:0}.result-stage{height:clamp(430px,42vw,510px);min-height:0;flex:0 0 auto;display:grid;place-items:center;overflow:hidden;border-radius:6px;background:var(--surface-subtle)}.empty-state{max-width:330px;display:grid;justify-items:center;padding:32px;text-align:center}.empty-icon{width:68px;height:68px;display:grid;place-items:center;margin-bottom:22px;border:1px solid var(--border-strong);border-radius:8px;color:var(--accent);background:var(--surface-raised)}.empty-state h3{margin-bottom:9px;font-size:17px}.empty-state p{margin-bottom:0;color:var(--text-muted);font-size:13px;line-height:1.6}.error-state .empty-icon{color:var(--danger)}.loading-state{width:100%;height:100%;align-self:stretch;display:flex;flex-direction:column;padding:18px}.video-skeleton{flex:1;min-height:0;display:grid;place-items:center;overflow:hidden;border-radius:6px;background:color-mix(in srgb,var(--surface-raised) 70%,var(--border))}.video-skeleton span{width:54px;height:54px;border-radius:8px;background:var(--surface-subtle)}.loading-copy{margin:18px 0 11px;font-size:13px}.loading-copy span{color:var(--text-muted);font-family:Cascadia Code,SFMono-Regular,Consolas,monospace;font-size:12px}.progress-track{height:3px;overflow:hidden;border-radius:6px;background:var(--border)}.progress-track span{display:block;width:100%;height:100%;transform-origin:left;background:var(--accent);transition:transform .16s ease}.ready-state{width:100%;height:100%;align-self:stretch;display:flex;flex-direction:column}.video-frame{width:100%;min-height:0;flex:1 1 0;display:grid;place-items:center;overflow:hidden;background:#101310}.video-frame video{width:100%;height:100%;min-height:0;min-width:0;display:block;object-fit:contain;background:#101310}.video-meta{flex:0 0 auto;padding:16px;background:var(--surface-subtle)}.video-meta>div{min-width:0;display:grid;gap:5px}.video-meta strong,.video-meta span{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.video-meta strong{font-size:13px}.video-meta span{color:var(--text-muted);font-size:11px}footer{width:min(1180px,calc(100% - 48px));margin:0 auto;display:flex;align-items:center;gap:10px;padding:24px 0 30px;border-top:1px solid var(--border);color:var(--text-muted);font-family:Cascadia Code,SFMono-Regular,Consolas,monospace;font-size:11px}footer a{color:var(--accent);text-underline-offset:3px}@media(max-width:820px){.tool-layout{grid-template-columns:1fr}.result-stage{height:440px}}@media(max-width:560px){.topbar,.workspace,footer{width:min(100% - 32px,1180px)}.topbar{height:64px}.workspace{padding:40px 0 54px}.intro{margin-bottom:30px}h1{font-size:38px}.lede{font-size:16px}.request-panel{padding:20px}.result-panel{padding:14px}.result-stage{height:360px}.video-meta{align-items:stretch;flex-direction:column}.download-button{width:100%}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{transition-duration:.01ms!important;animation-duration:.01ms!important;animation-iteration-count:1!important}}
