:root{--color-primary:#667eea;--color-primary-dark:#5a6fd6;--color-secondary:#764ba2;--color-success:#67c23a;--color-warning:#f5a623;--color-danger:#f56c6c;--color-info:#909399;--color-text-primary:#1a1a2e;--color-text-regular:#333;--color-text-secondary:#888;--color-text-placeholder:#999;--color-border:#dcdfe6;--color-bg:#f5f7fa;--color-bg-white:#fff;--font-size-sm:12px;--font-size-base:14px;--font-size-lg:16px;--font-size-xl:20px;--font-size-xxl:24px;--border-radius-sm:4px;--border-radius-base:8px;--border-radius-lg:12px;--border-radius-xl:16px;--spacing-xs:4px;--spacing-sm:8px;--spacing-md:12px;--spacing-lg:16px;--spacing-xl:20px;--spacing-xxl:24px;--shadow-sm:0 2px 4px #0000000f;--shadow-base:0 4px 12px #00000014;--shadow-lg:0 20px 60px #00000026;--sidebar-width:240px;--header-height:60px}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body{height:100%;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica 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