:root{--bg:#eef2f7;--paper:rgba(255,255,255,.9);--panel:#f8fbff;--ink:#101725;--text:#455266;--muted:#778297;--line:rgba(16,23,37,.12);--soft-line:rgba(16,23,37,.07);--blue:#0b68d1;--teal:#00857a;--violet:#6958c8;--gold:#f3b63e;--mint:#10b981;--shadow:0 12px 30px rgba(16,23,37,.08);--shadow-lg:0 18px 44px rgba(16,23,37,.12);--sans:"Avenir Next","Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;--mono:ui-monospace,SFMono-Regular,Consolas,monospace}*{box-sizing:border-box}html{scroll-behavior:smooth}body{min-width:320px;margin:0;background:linear-gradient(90deg,rgba(16,23,37,.042) 1px,transparent 1px),linear-gradient(180deg,rgba(16,23,37,.042) 1px,transparent 1px),radial-gradient(circle at 88% 3%,rgba(60,126,238,.17),transparent 30%),radial-gradient(circle at 6% 52%,rgba(0,133,122,.08),transparent 25%),linear-gradient(180deg,#f6f9fd 0%,var(--bg) 50%,#f8fafc 100%);background-size:44px 44px,44px 44px,auto,auto;color:var(--ink);font:14px/1.55 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