:root{font-family:PingFang SC,Microsoft YaHei,Helvetica Neue,sans-serif;color:#f4f8ff;background:radial-gradient(circle at top,rgba(98,137,179,.18),transparent 30%),linear-gradient(180deg,#0a1520,#081219);color-scheme:dark}*{box-sizing:border-box}body{margin:0;min-height:100vh}body:before{content:"";position:fixed;inset:0;pointer-events:none;background:linear-gradient(180deg,rgba(255,255,255,.06),transparent 18%),radial-gradient(circle at 50% 30%,transparent 45%,rgba(0,0,0,.24) 100%)}#root{position:relative;z-index:1}.app-shell{display:grid;grid-template-columns:360px minmax(0,1fr);gap:24px;min-height:100vh;padding:20px}.control-panel,.preview-shell{border:1px solid rgba(255,255,255,.12);border-radius:26px;background:#091018cc;-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);box-shadow:0 28px 70px #00000057}.control-panel{align-self:start;padding:24px 20px}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:#ffffff14;color:#f4f8ffb3;font-size:12px;letter-spacing:.08em;text-transform:uppercase}h1{margin:14px 0 10px;font-size:34px;line-height:1.05}.intro{margin:0 0 22px;color:#f4f8ffb3;font-size:14px;line-height:1.7}.group{margin-bottom:18px}.group-title{margin:0 0 10px;color:#ffffffe0;font-size:13px;letter-spacing:.08em;text-transform:uppercase}label{display:block;margin-bottom:10px;color:#f4f8ffb3;font-size:13px}.inline-toggle{display:flex;align-items:center;gap:10px;margin:14px 0 12px;color:#f4f8ff}.inline-toggle input{width:auto;margin:0}input,select{width:100%;margin-top:6px;padding:12px 14px;border:1px solid rgba(255,255,255,.12);border-radius:14px;background:#ffffff0f;color:#f4f8ff;font:inherit;outline:none}.row{display:grid;grid-template-columns:1.2fr 1fr 1fr;gap:10px}.row-single{grid-template-columns:1fr}.actions{display:grid;gap:10px;margin-top:14px}button{border:0;border-radius:999px;padding:14px 18px;font:inherit;font-weight:800;cursor:pointer}button.primary{color:#111;background:linear-gradient(135deg,#ffe17c,#ffcb42)}button.secondary{color:#f4f8ff;background:#ffffff14;border:1px solid rgba(255,255,255,.12)}button:disabled{opacity:.65;cursor:wait}.status-panel{margin-top:16px;padding:14px;border-radius:16px;background:#ffffff0d;color:#f4f8ffc7;font-size:13px;line-height:1.7}.preview-shell{display:flex;align-items:center;justify-content:center;padding:20px;min-height:calc(100vh - 40px)}.player-frame{width:100%;max-width:1280px;aspect-ratio:16 / 9;overflow:hidden;border-radius:24px;background:#ffffff0a;box-shadow:0 24px 60px #00000047}@media(max-width:1120px){.app-shell{grid-template-columns:1fr}.preview-shell{min-height:auto}}@media(max-width:720px){.app-shell{padding:14px;gap:16px}.control-panel,.preview-shell{border-radius:20px}.control-panel{padding:18px 14px}.eyebrow{padding:5px 10px;font-size:11px}h1{margin:12px 0 8px;font-size:28px}.intro{margin-bottom:18px;font-size:13px;line-height:1.6}.group{margin-bottom:14px}.group-title,label{margin-bottom:8px;font-size:12px}input,select{padding:11px 12px;border-radius:12px;font-size:16px}.inline-toggle{margin:12px 0 10px;gap:8px}.actions{gap:8px;margin-top:12px}button{padding:13px 16px;font-size:15px}.status-panel{margin-top:14px;padding:12px;border-radius:14px;font-size:12px;line-height:1.6}.player-frame{aspect-ratio:9 / 14}.row{grid-template-columns:1fr}}