:root{color-scheme:light;--ink:#172033;--muted:#647187;--line:#dce3ec;--paper:#f8f7f3;--panel:#fff;--blue:#2857d5;--blue-soft:#e9efff;--blue-deep:#173b9d;--radius:22px;--shadow:0 14px 40px rgba(23,32,51,.06);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--paper)}
*{box-sizing:border-box}body{min-width:320px;margin:0;background:radial-gradient(circle at 90% 1%,rgba(221,230,255,.86),transparent 24rem),radial-gradient(circle at 5% 55%,rgba(254,237,211,.55),transparent 28rem),var(--paper);line-height:1.55}button,input,select{font:inherit}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin-top:0}p{line-height:1.7}h1,h2{font-family:Georgia,"Songti SC","Noto Serif SC",serif;letter-spacing:-.045em}h1{margin-bottom:16px;font-size:clamp(34px,4vw,50px);line-height:1.2}h2{font-size:27px;line-height:1.3;margin-bottom:24px}h3{font-size:15px;margin-bottom:5px}.shell{width:min(1180px,calc(100% - 48px));margin-inline:auto}
.site-header{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:78px;padding:0 max(24px,calc((100% - 1180px)/2));border-bottom:1px solid rgba(220,227,236,.86);background:rgba(248,247,243,.72)}.brand{display:inline-flex;align-items:center;gap:10px;font-size:20px;font-weight:780;letter-spacing:-.04em}.brand-mark{display:grid;width:30px;height:30px;place-items:center;border-radius:9px;color:#fff;background:var(--ink);font-family:Georgia,serif;font-size:22px;font-style:italic}.nav-link{padding:8px 12px;border:1px solid var(--line);border-radius:9px;background:rgba(255,255,255,.88);font-size:13px;font-weight:650;color:var(--muted)}.nav-link:hover{color:var(--blue)}
.channel-main{padding-top:52px;padding-bottom:60px}.channel-intro{margin-bottom:34px}.eyebrow{color:var(--blue);font-size:12px;font-weight:760;letter-spacing:.08em;margin-bottom:12px}.intro-copy{color:var(--muted);font-size:17px;margin-bottom:20px}.capabilities{display:flex;gap:9px;flex-wrap:wrap}.capabilities span{color:var(--blue-deep);background:rgba(233,239,255,.75);border:1px solid #d8e2fb;border-radius:999px;padding:5px 11px;font-size:12px}.workspace{display:grid;grid-template-columns:minmax(0,1.65fr) minmax(280px,.85fr);gap:26px;align-items:start}.panel{border:1px solid var(--line);border-radius:var(--radius);background:var(--panel);box-shadow:var(--shadow);padding:32px;min-width:0}.guide{display:grid;gap:20px}.guide-panel{background:linear-gradient(145deg,#fff,#eef3ff);padding:28px}.guide-panel h2{font-size:25px}.steps{list-style:none;margin:0;padding:0;display:grid;gap:24px}.steps li{display:flex;gap:14px}.steps li>span{display:grid;flex:0 0 30px;height:30px;place-items:center;border-radius:9px;color:var(--blue);background:#fff;border:1px solid #dce5fc;font-size:11px;font-weight:750}.steps p{font-size:14px;color:var(--muted);margin:0}.notice{padding:24px 26px;border:1px solid var(--line);border-radius:18px;background:rgba(255,255,255,.55)}.notice h3{margin-bottom:10px}.notice p{font-size:13px;color:var(--muted);margin-bottom:10px}.notice p:last-child{margin-bottom:0}
label{display:block;font-size:14px;font-weight:650;margin:22px 0 9px}input,select{width:100%;min-width:0;padding:12px 14px;border:1px solid #cbd5e4;border-radius:10px;background:#fff;color:var(--ink)}input:focus,select:focus{border-color:var(--blue)}.file-zone{border:1px dashed #aabfea;border-radius:15px;background:#f7f9ff;padding:22px;text-align:center}.file-symbol{display:grid;place-items:center;margin:0 auto 8px;width:36px;height:36px;border-radius:10px;background:var(--blue-soft);color:var(--blue);font-size:24px}.file-zone p{font-size:14px;margin-bottom:12px;color:var(--muted)}input[type=file]{max-width:100%;padding:0;border:0;border-radius:0;background:transparent;font-size:13px}input[type=file]::file-selector-button{padding:9px 12px;margin-right:10px;border:1px solid #c8d8fc;border-radius:8px;color:var(--blue-deep);background:#fff;font:inherit;cursor:pointer}.hint{font-size:13px;color:var(--muted);margin-top:12px}.limit-box{margin:14px 0 10px;padding:12px 14px;border-radius:10px;background:#f3f6fc;color:var(--muted);font-size:13px;line-height:1.7}#formats{line-height:1.8}button,.button{display:inline-flex;justify-content:center;align-items:center;gap:14px;background:var(--blue);color:#fff;border:1px solid transparent;border-radius:10px;padding:12px 18px;font-weight:650;text-decoration:none;cursor:pointer;line-height:1.5;transition:background 150ms}button:hover,.button:hover{background:var(--blue-deep)}button:disabled{opacity:.5;cursor:not-allowed}.secondary{color:var(--blue-deep);background:var(--blue-soft);border-color:#d6e1fc}.secondary:hover{background:#dce6ff}.actions{display:flex;gap:12px;flex-wrap:wrap;margin:18px 0}.text-link{display:inline-flex;gap:10px;align-items:center;font-size:14px;font-weight:650;color:var(--blue)}.text-link:hover{text-decoration:underline}#submit{width:100%;margin-top:14px}#result h2{margin-bottom:12px}.qr-frame{margin:24px auto;width:fit-content;max-width:100%;padding:12px;border:1px solid var(--line);border-radius:16px;background:#fff}#qr{display:block;width:min(280px,100%);height:auto;margin:auto}#link{font-size:13px;background:#f8faff}.stage{font-weight:650;color:var(--blue-deep)}#status{overflow-wrap:anywhere;font-size:14px;margin:16px 0 0}#status:empty,#stage:empty{display:none}#retry{margin-top:16px}progress{width:100%;height:10px;margin-top:24px;border:0;border-radius:999px;overflow:hidden;accent-color:var(--blue)}progress::-webkit-progress-bar{background:var(--blue-soft);border-radius:999px}progress::-webkit-progress-value{background:var(--blue);border-radius:999px}progress::-moz-progress-bar{background:var(--blue)}
.playback-main{max-width:860px}.player-heading{display:flex;gap:16px;align-items:flex-start;margin-bottom:22px}.player-heading h2{font-size:25px;margin:0 0 6px}.player-heading .hint{margin:0}.media-symbol{display:grid;place-items:center;flex:0 0 44px;height:44px;border-radius:13px;background:var(--blue-soft);color:var(--blue);font-size:18px}.player-note{padding-top:18px;border-top:1px solid var(--line)}audio,video{display:block;width:100%;margin:24px 0}video{max-height:65vh;background:#101724;border-radius:14px}.share-another{text-align:center;margin-top:32px;color:var(--muted);font-size:14px}.share-another p{margin-bottom:8px}.site-footer{display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;border-top:1px solid var(--line);padding:24px 0 30px;font-size:12px;color:var(--muted)}.site-footer a{color:var(--blue)}[hidden]{display:none!important}:focus-visible{outline:3px solid #5e83ff;outline-offset:3px}.skip-link{position:fixed;top:-100px;left:16px;z-index:10;background:var(--blue);color:#fff;padding:8px 12px;border-radius:8px}.skip-link:focus{top:16px}
@media(max-width:760px){.workspace{grid-template-columns:1fr}.channel-main{padding-top:32px;padding-bottom:36px}.channel-intro{margin-bottom:26px}.guide{grid-template-columns:1fr}.panel{padding:26px}.guide-panel{padding:26px}.site-footer{gap:12px}.intro-copy{font-size:15px}}
@media(max-width:420px){.shell{width:calc(100% - 32px)}.site-header{min-height:68px;padding:0 16px;gap:10px}.nav-link{font-size:12px;padding:7px 9px}.panel{padding:22px 18px}.file-zone{padding:18px 12px}h1{font-size:32px}h2{font-size:25px}.guide-panel h2{font-size:23px}.site-footer{flex-direction:column}.actions>*{flex:1}.player-heading{gap:12px}.player-heading h2{font-size:23px}.media-symbol{flex-basis:36px;height:36px;font-size:15px}}
@media(prefers-reduced-motion:reduce){*{transition:none!important;scroll-behavior:auto!important}}