:root{--bg:#f5f6fa;--card:#ffffff;--border:#e5e7eb;--text:#1f2937;--muted:#6b7280;--primary:#2563eb;--primary-dark:#1d4ed8;--primary-soft:#eff6ff;--success:#16a34a;--success-soft:#f0fdf4;--danger:#dc2626;--danger-soft:#fef2f2;--warning:#d97706;--warning-soft:#fffbeb;--radius:10px;--shadow:0 1px 3px rgba(0,0,0,0.08);--font:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,sans-serif}*{box-sizing:border-box;margin:0;padding:0}body,html{font-family:var(--font);background:var(--bg);color:var(--text);font-size:15px;line-height:1.6}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}.container{max-width:1080px;margin:0 auto;padding:0 16px}.page{padding:24px 0 60px}.topbar{background:#1e293b;color:#fff;position:-webkit-sticky;position:sticky;top:0;z-index:50;box-shadow:var(--shadow)}.topbar-inner{max-width:1080px;margin:0 auto;padding:0 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