:root{--bg: #f4f5fb;--bg2: #ffffff;--ink: #1a1b2e;--muted: #8b8fa3;--rule: #e8eaf3;--accent: #5b6ef5;--accent2: #a855f7;--accent-soft: rgba(91, 110, 245, .08);--accent2-soft: rgba(168, 85, 247, .08);--success: #22c55e;--warning: #f59e0b;--danger: #ef4444;--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;--max: 680px;--radius: 16px;--radius-sm: 10px;--shadow: 0 4px 24px rgba(26, 27, 46, .06);--shadow-hover: 0 8px 32px rgba(26, 27, 46, .1)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:16px;scroll-behavior:smooth}body{font-family:var(--font);color:var(--ink);background:var(--bg);line-height:1.6;min-height:100vh;padding:2rem 1rem 4rem;position:relative;overflow-x:hidden}body:before{content:"";position:fixed;top:0;right:0;bottom:0;left:0;background:radial-gradient(ellipse at 20% 0%,rgba(91,110,245,.07),transparent 50%),radial-gradient(ellipse at 80% 100%,rgba(168,85,247,.06),transparent 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