:root{--bg: #eef5fb;--paper: #ffffff;--ink: #071126;--muted: #60738b;--line: #d9e4ef;--blue: #2563eb;--blue-dark: #1746b6;--green: #16a34a;--red: #dc2626;--orange: #f59e0b;--shadow: 0 24px 70px rgba(15, 23, 42, .08)}*{box-sizing:border-box}body{margin:0;color:var(--ink);font-family:Noto Sans SC,Microsoft YaHei,sans-serif;background:radial-gradient(circle at 12% -14%,rgba(37,99,235,.18),transparent 32%),radial-gradient(circle at 95% 0%,rgba(14,165,233,.14),transparent 26%),linear-gradient(180deg,#fbfdff,var(--bg))}button,input,textarea,select{font:inherit}button{cursor:pointer}button:disabled{cursor:not-allowed;opacity:.5}.app-shell{max-width:1680px;margin:0 auto;padding:0 44px 56px}.topbar{height:74px;display:flex;align-items:center;justify-content:space-between;gap:18px;position:sticky;top:0;z-index:20;background:#ffffffe6;-webkit-backdrop-filter:blur(16px);backdrop-filter:blur(16px);border-bottom:1px solid 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