:root{--bg-page:#f5f7fb;--bg-surface:#fff;--bg-muted:#f1f5f9;--bg-soft:#eef2ff;--text-primary:#0f172a;--text-secondary:#475569;--text-tertiary:#64748b;--text-inverse:#fff;--primary:#2563eb;--primary-hover:#1d4ed8;--primary-soft:#dbeafe;--accent:#0ea5e9;--success:#059669;--success-soft:#d1fae5;--warning:#a34c08;--danger:#dc2626;--danger-soft:#fee2e2;--border:#e2e8f0;--border-strong:#cbd5e1;--radius-sm:8px;--radius-md:12px;--radius-lg:16px;--radius-xl:20px;--radius-full:999px;--shadow-xs:0 1px 2px #0f172a0a;--shadow-sm:0 1px 3px #0f172a0f, 0 1px 2px #0f172a0a;--shadow-md:0 8px 24px #0f172a14;--shadow-lg:0 16px 40px #0f172a1a;--nav-height:64px;--content-width:1120px;--font:"Inter", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", -apple-system, BlinkMacSystemFont, sans-serif}*{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-height) + 24px);-webkit-text-size-adjust:100%}body{font-family:var(--font);background:var(--bg-page);color:var(--text-primary);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.6}a{color:inherit;text-decoration:none}button,input,textarea,select{font:inherit}button{cursor:pointer;touch-action:manipulation}button:disabled{cursor:not-allowed}:focus-visible{outline:3px solid var(--primary);outline-offset:3px}input,textarea,select{min-width:0}button,a{-webkit-tap-highlight-color:#2563eb1f}@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,:before,:after{transition:none!important;animation:none!important}}img{max-width:100%;display:block}::selection{background:var(--primary-soft);color:var(--text-primary)}.container{max-width:var(--content-width);margin:0 auto;padding:0 24px}