:root{--bg: #0b1020;--bg-2: #121a33;--card: rgba(18, 26, 51, .88);--line: rgba(255, 255, 255, .08);--text: #f4f1ea;--muted: #9aa4c2;--gold: #f4d35e;--gold-2: #e0b12a;--danger: #ff7a7a;--ok: #6ee7b7;--shadow: 0 24px 80px rgba(0, 0, 0, .35);--radius: 22px;font-family:PingFang SC,Hiragino Sans GB,Noto Sans SC,Microsoft YaHei,sans-serif}*{box-sizing:border-box}html,body{margin:0;min-height:100%;background:radial-gradient(1200px 600px at 10% -10%,rgba(244,211,94,.12),transparent 50%),radial-gradient(800px 500px at 100% 0%,rgba(94,140,244,.16),transparent 45%),var(--bg);color:var(--text)}body{min-height:100vh}a{color:var(--gold);text-decoration:none}button,input{font:inherit}.shell{width:min(1360px,calc(100% - 40px));margin:0 auto;padding:28px 0 64px}.login-page{min-height:100vh;display:grid;place-items:center;padding:24px}.login-card{width:min(420px,100%)}.field{display:block;margin-bottom:14px}.field span{display:block;margin-bottom:6px;color:var(--muted);font-size:13px}.field input{width:100%;border:1px solid var(--line);background:#00000038;color:var(--text);border-radius:12px;padding:11px 12px;outline:none}.field input:focus{border-color:#f4d35e73}.login-card .btn{width:100%;margin-top:8px}.demo-box{margin:4px 0 10px;padding:12px 14px;border-radius:14px;border:1px dashed rgba(244,211,94,.35);background:#f4d35e0f}.demo-title{font-size:13px;margin-bottom:6px;color:var(--gold)}.demo-row{color:var(--muted);font-size:13px;line-height:1.7}.demo-box code{color:var(--text);font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace}.demo-box .btn{width:auto;margin-top:10px}.userbar{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:13px}.brand{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:28px}.logo{display:flex;align-items:center;gap:12px}.mark{width:42px;height:42px;border-radius:14px;background:linear-gradient(160deg,#1c2748,#0d1326);border:1px solid var(--line);display:grid;place-items:center;color:var(--gold);font-weight:700;letter-spacing:.04em}.logo h1{margin:0;font-size:22px;letter-spacing:.08em}.logo p{margin:2px 0 0;color:var(--muted);font-size:13px}.grid{display:grid;grid-template-columns:1.05fr .95fr;gap:20px}.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px);padding:22px}.drop{min-height:280px;border:1.5px dashed rgba(244,211,94,.28);border-radius:18px;background:#ffffff05;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:28px;cursor:pointer;transition:border-color .2s,background .2s,transform .2s}.drop.dragover{border-color:var(--gold);background:#f4d35e14;transform:translateY(-1px)}.drop h2{margin:10px 0 6px;font-size:20px}.drop 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0;color:var(--muted);font-size:13px}.stage{flex:1;display:flex;align-items:center;justify-content:center;padding:8px 12px 24px}video{width:min(920px,100%);max-height:calc(100vh - 120px);background:#000;border-radius:16px;border:1px solid var(--line)}.empty{text-align:center;padding:48px 16px}.empty h2{margin:0 0 8px}.empty p{color:var(--muted)}@media(max-width:860px){.grid{grid-template-columns:1fr}.brand{align-items:flex-start;flex-direction:column}.userbar{width:100%;justify-content:space-between}}