.reading-progress{position:fixed;bottom:0;left:0;width:0;height:3px;background:linear-gradient(90deg,#007acc,#00a8ff);z-index:9999;transition:width .1s ease-out;box-shadow:0 -1px 3px rgba(0,122,204,.3)}[data-theme=dark] .reading-progress{background:linear-gradient(90deg,#4fc3f7,#29b6f6);box-shadow:0 -1px 3px rgba(79,195,247,.3)}#top-link{display:none!important}.floating-toc{position:fixed;left:20px;bottom:20px;width:50px;height:50px;background:linear-gradient(135deg,#007acc,#0056b3);border:1px solid rgba(255,255,255,.2);border-radius:50%;box-shadow:0 4px 12px rgba(0,122,204,.3);cursor:pointer;z-index:1001;display:flex;align-items:center;justify-content:center;transition:all .3s ease;opacity:.9}.scroll-to-top-btn{position:fixed;right:20px;bottom:20px;width:50px;height:50px;background:rgba(0,122,204,.9);border:none;border-radius:50%;box-shadow:0 4px 12px rgba(0,0,0,.2);cursor:pointer;z-index:1001;display:flex;align-items:center;justify-content:center;transition:all .3s ease;opacity:0;visibility:hidden;transform:translateY(20px)}.scroll-to-top-btn.show{opacity:.9;visibility:visible;transform:translateY(0)}.scroll-to-top-btn:hover{opacity:1;transform:scale(1.1);box-shadow:0 6px 20px rgba(0,122,204,.4);background:#007acc}.scroll-to-top-btn svg{width:24px;height:24px;fill:#fff}.floating-toc:hover{opacity:1;transform:scale(1.1);box-shadow:0 6px 20px rgba(0,122,204,.4);background:linear-gradient(135deg,#0084ff,#0066cc)}.floating-toc svg{width:24px;height:24px;fill:#fff}.floating-toc-panel{position:fixed;left:20px;bottom:80px;max-width:300px;max-height:400px;background:var(--theme);border:1px solid var(--border);border-radius:12px;box-shadow:0 8px 32px rgba(0,0,0,.2);overflow-y:auto;z-index:1000;opacity:0;visibility:hidden;transform:translateY(20px);transition:all .3s ease;padding:16px}.floating-toc-panel.show{opacity:1;visibility:visible;transform:translateY(0)}.floating-toc-panel h4{margin:0 0 12px;font-size:14px;font-weight:600;color:var(--primary);border-bottom:1px solid var(--border);padding-bottom:8px}.floating-toc-panel ul{margin:0;padding:0;list-style:none}.floating-toc-panel li{margin:0;padding:0}.floating-toc-panel a{display:block;padding:6px 0;font-size:13px;color:var(--content);text-decoration:none;line-height:1.4;border-radius:4px;transition:all .2s ease}.floating-toc-panel a:hover{color:var(--primary);background:var(--code-bg);padding-left:8px}.floating-toc-panel li[data-level="2"] a{padding-left:12px}.floating-toc-panel li[data-level="3"] a{padding-left:24px}.floating-toc-panel li[data-level="4"] a{padding-left:36px}.floating-toc-panel li[data-level="5"] a{padding-left:48px}.floating-toc-panel li[data-level="6"] a{padding-left:60px}.floating-toc-panel a.active{color:var(--primary);font-weight:600;background:var(--code-bg);padding-left:8px}@media(max-width:768px){.floating-toc{left:15px;bottom:15px;width:45px;height:45px}.scroll-to-top-btn{right:15px;bottom:15px;width:45px;height:45px}.floating-toc-panel{left:15px;bottom:70px;max-width:calc(100vw - 30px);max-height:300px}.floating-toc svg,.scroll-to-top-btn svg{width:20px;height:20px}}