.top-nav{width:100%;background-color:var(--bg-surface);border-bottom:1px solid var(--border);padding:0 20px;position:fixed;top:0;left:0;height:56px;z-index:100;display:flex;align-items:center;box-shadow:var(--shadow-sm)}.top-nav-left{display:flex;align-items:center;gap:8px;flex-basis:20%}.top-nav-right{display:flex;align-items:center;justify-content:flex-start;flex-basis:80%}.top-nav-right.open{display:block}.top-title{color:var(--text);font-size:1.1rem;font-weight:700;margin:0 12px 0 0;cursor:pointer;letter-spacing:.5px}.nav-list{list-style:none;padding:0;margin:0 10px;display:flex;gap:4px}.nav-link{text-decoration:none;color:var(--text-secondary);font-size:.85rem;font-weight:500;padding:6px 12px;border-radius:var(--radius-sm);transition:background-color .2s,color .2s}.nav-link:hover{background-color:var(--bg-hover);color:var(--color-primary);text-decoration:none}.toggle-button{width:36px;height:36px;background:transparent;border:1px solid var(--border);border-radius:var(--radius-sm);display:flex;justify-content:center;align-items:center;color:var(--text-secondary);cursor:pointer;transition:background-color .2s,border-color .2s,color .2s}.toggle-button:hover{background-color:var(--bg-hover);border-color:var(--color-primary);color:var(--color-primary)}.toggle-button.active{background-color:var(--color-primary-soft);border-color:var(--color-primary);color:var(--color-primary)}.theme-switcher{color:var(--color-primary);border:none;cursor:pointer}.theme-switcher:hover{color:var(--color-primary-hover)}.hamburger-menu{display:none;flex-direction:column;justify-content:space-between;width:24px;height:18px;cursor:pointer}.hamburger-menu .bar{height:2px;width:100%;background-color:var(--text);border-radius:2px}@media (max-width: 768px){.nav-list{display:none;flex-direction:column;position:absolute;top:56px;left:0;width:100%;background-color:var(--bg-surface);border-bottom:1px solid var(--border);padding:8px;gap:2px;box-shadow:var(--shadow)}.top-nav-right.open .nav-list,.hamburger-menu{display:flex}.top-title{flex:1}}.theme-switcher{background-color:transparent;display:flex;align-items:center;cursor:pointer}.theme-switch-checkbox{display:none}.theme-switch-label{display:flex;align-items:center;width:52px;height:28px;position:relative;background-color:var(--bg-hover);border-radius:999px;transition:background .3s;cursor:pointer}.theme-switch-checkbox:checked+.theme-switch-label{background-color:var(--color-primary)}.theme-switch-inner{position:relative;width:100%;height:100%;display:flex;justify-content:center;align-items:center}.icon{position:absolute;display:flex;align-items:center;justify-content:center;transition:opacity .3s ease,transform .3s ease;opacity:0}.sun{opacity:1;color:#f59e0b}.theme-switch-checkbox:checked+.theme-switch-label .sun{opacity:0}.theme-switch-checkbox:checked+.theme-switch-label .moon{opacity:1;color:#fde68a}.markdown-content{position:absolute;top:72px;left:50%;transform:translate(-50%);width:calc(100% - 40px);max-width:820px;background-color:var(--bg-surface);border-radius:var(--radius-lg);padding:44px 52px;box-shadow:var(--shadow);min-height:calc(100vh - 120px);color:var(--text);font-size:.9rem;line-height:1.75}.feature-area{display:flex;align-items:center;justify-content:flex-end;flex-wrap:wrap;gap:12px;margin:0 0 24px}.highlight-style-selector{display:inline-flex;align-items:center;gap:6px;font-size:.82rem;color:var(--text-secondary)}.highlight-style-selector select{padding:5px 10px;border-radius:var(--radius-sm);border:1px solid var(--border);background-color:var(--bg-surface);color:var(--text);font-size:.82rem;cursor:pointer}.code-container{border:1px solid var(--border);border-radius:var(--radius);margin:1.2em 0;box-shadow:0 2px 8px #00000014;overflow:hidden}.code-header{display:flex;align-items:center;justify-content:space-between;background-color:#1e1e1e;padding:6px 14px;color:#fff;border-bottom:none}.code-dots{margin-left:.5rem}.code-dots span{margin:0 .15rem}.copy-button{background-color:#007aff;color:#fff;border:none;padding:4px 10px;border-radius:var(--radius-sm);cursor:pointer;font-size:.95em;transition:background-color .3s ease}.copy-button:hover{background-color:#005bb5}.code-container>div{padding:0;background-color:#1e1e1e;color:#f8f8f2;font-size:.82em;overflow-x:auto}.markdown-content.dark-mode .code-container>div{background-color:#282c34;color:#abb2bf}.markdown-content.dark-mode .code-header{background-color:#282c34;color:#fff}.markdown-content.dark-mode .copy-button{background-color:#61dafb}.code-header+div{margin:0!important;border-radius:0 0 var(--radius) var(--radius)!important}.markdown-content h1{font-size:1.5rem;font-weight:700;margin:1.4em 0 .7em;padding-bottom:.35em;border-bottom:1px solid var(--border);color:var(--text);line-height:1.3}.markdown-content h2{font-size:1.25rem;font-weight:600;margin:1.3em 0 .6em;padding-bottom:.3em;border-bottom:1px solid var(--border);line-height:1.35}.markdown-content h3{font-size:1.05rem;font-weight:600;margin:1.2em 0 .5em;line-height:1.4}.markdown-content h4,.markdown-content h5,.markdown-content h6{font-size:.95rem;font-weight:600;margin:1em 0 .4em}.markdown-content p{margin:1em 0}.markdown-content ul,.markdown-content ol{margin:.8em 0;padding-left:1.6em}.markdown-content li{margin:.4em 0}.markdown-content a{color:var(--color-primary);text-decoration:none;font-weight:500}.markdown-content a:hover{text-decoration:underline}.markdown-content blockquote{margin:1.2em 0;padding:.6em 1.1em;border-left:4px solid var(--color-primary);background-color:var(--bg-hover);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:var(--text-secondary)}.markdown-content code{font-family:var(--font-mono);font-size:.85em;background-color:var(--bg-hover);padding:.2em .45em;border-radius:var(--radius-sm)}.markdown-content pre{margin:1.2em 0;border-radius:var(--radius);overflow:hidden}.markdown-content pre code{display:block;padding:18px 20px;background-color:#1e293b;color:#e2e8f0;border-radius:var(--radius);overflow-x:auto;line-height:1.6;font-size:.82em}.markdown-content table{width:100%;border-collapse:collapse;margin:1.2em 0;font-size:.88em}.markdown-content th,.markdown-content td{border:1px solid var(--border);padding:10px 14px;text-align:left}.markdown-content th{background-color:var(--bg-hover);font-weight:600}.markdown-content img{max-width:100%;border-radius:var(--radius-sm)}.markdown-content hr{border:none;border-top:1px solid var(--border);margin:2.2em 0}@media (max-width: 768px){.markdown-content{position:static;transform:none;left:auto;margin:12px;padding:24px 20px;width:calc(100% - 24px);max-width:none}.markdown-content h1{font-size:1.3rem}.markdown-content h2{font-size:1.12rem}.markdown-content h3{font-size:1rem}.feature-area{margin:0 0 16px}.button-eye-care{padding:6px 12px;font-size:.75rem}.highlight-style-selector select{font-size:.75rem;padding:4px 8px}}.side-nav{background-color:var(--bg-surface);padding:16px 12px;position:fixed;top:56px;left:0;height:calc(100% - 56px);overflow-y:auto;border-right:1px solid var(--border);z-index:150;transform:translate(0);transition:transform .25s ease}.side-nav:not(.open){transform:translate(-100%)}.side-nav.resizing{transition:none}.side-nav-content{height:100%;overflow-y:auto;padding-right:4px}.side-nav-resize-handle{position:absolute;top:0;right:-3px;width:6px;height:100%;cursor:col-resize;z-index:10;background:transparent;transition:background-color .2s}.side-nav-resize-handle:hover,.side-nav.resizing .side-nav-resize-handle{background-color:var(--color-primary);opacity:.3}.side-nav-backdrop{display:none}.side-nav .nav-list,.side-nav .sub-list{display:block;list-style:none;padding:0;margin:0}.side-nav .nav-item{margin-bottom:2px;display:block}.folder-name{display:block;padding:8px 12px;border-radius:var(--radius-sm);font-size:.82rem;font-weight:600;cursor:pointer;color:var(--text);background:transparent;transition:background-color .2s,color .2s}.file-name{display:block;padding:8px 12px;border-radius:var(--radius-sm);font-size:.82rem;cursor:pointer;color:var(--text-secondary);background:transparent;transition:background-color .2s,color .2s}.folder-name:hover{background-color:var(--bg-hover)}.file-name:hover{background-color:var(--bg-hover);color:var(--text)}.folder-name.expanded{color:var(--color-primary);background-color:var(--color-primary-soft)}.file-name.active{color:var(--color-primary);background-color:var(--color-primary-soft);font-weight:600;border-left:3px solid var(--color-primary)}.side-nav .sub-list{padding-left:12px;margin-top:2px;margin-bottom:4px}@media (max-width: 768px){.side-nav-backdrop{display:block;position:fixed;top:0;left:0;width:100%;height:100%;background-color:#00000073;z-index:140;opacity:0;pointer-events:none;transition:opacity .25s ease}.side-nav-backdrop.visible{opacity:1;pointer-events:auto}.side-nav{width:85%!important;max-width:320px;padding:12px 10px;z-index:200;box-shadow:var(--shadow)}.side-nav-resize-handle{display:none}.side-nav .sub-list{padding-left:12px;margin-top:2px;margin-bottom:4px;display:block;position:relative;overflow:visible}.folder-name,.file-name{padding:10px 14px;font-size:.85rem}}.table-of-contents{margin:0;padding:16px;border:1px solid var(--border);background-color:var(--bg-surface);border-radius:var(--radius);max-width:280px;position:fixed;top:70px;right:20px;box-shadow:var(--shadow-sm);z-index:1000;overflow-y:auto;max-height:calc(100vh - 100px)}.table-of-contents ul{list-style-type:none;padding-left:0;margin:0}.table-of-contents li{margin:.4em 0}.table-of-contents a{display:block;text-decoration:none;color:var(--text-secondary);font-weight:400;padding:2px 6px;border-radius:var(--radius-sm);transition:background-color .2s,color .2s}.table-of-contents a:hover{background-color:var(--bg-hover);color:var(--color-primary);text-decoration:none}.toc-level-1{font-weight:600;font-size:.85rem}.toc-level-2{margin-left:14px;font-size:.8rem}.toc-level-3{margin-left:28px;font-size:.75rem}.table-of-contents .toggle-button{display:flex;align-items:center;justify-content:center;width:28px;height:28px;background-color:var(--bg-hover);color:var(--text-secondary);border:none;border-radius:var(--radius-sm);cursor:pointer;margin-bottom:12px;transition:background-color .2s,color .2s}.table-of-contents .toggle-button:hover{background-color:var(--color-primary);color:#fff}.toc-chevron{transition:transform .2s ease}.table-of-contents.collapsed .toc-chevron{transform:rotate(-90deg)}.table-of-contents.collapsed{max-height:44px;overflow:hidden;width:44px;padding:8px}.table-of-contents.collapsed .toggle-button{margin-bottom:0}@media (max-width: 768px){.table-of-contents{top:56px;right:0;width:80%;max-width:none;max-height:40vh}.table-of-contents.collapsed{width:44px;max-height:44px}.toc-level-2{margin-left:10px}.toc-level-3{margin-left:20px}}a{color:var(--color-primary);text-decoration:none}a:hover{color:var(--color-primary-hover);text-decoration:underline}a:visited{color:var(--color-primary)}a:active{color:var(--color-primary-hover)}:root{--color-primary: #2563eb;--color-primary-hover: #1d4ed8;--color-primary-soft: #dbeafe;--bg: #f8fafc;--bg-surface: #ffffff;--bg-hover: #f1f5f9;--text: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--color-danger: #ef4444;--radius-sm: 6px;--radius: 8px;--radius-lg: 12px;--shadow-sm: 0 1px 2px rgba(15, 23, 42, .04);--shadow: 0 4px 12px rgba(15, 23, 42, .08);--font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;--font-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;--nav-height: 60px}body.light-mode{background-color:var(--bg);color:var(--text)}body.dark-mode{--bg: #0f172a;--bg-surface: #1e293b;--bg-hover: #334155;--text: #f1f5f9;--text-secondary: #94a3b8;--border: #334155;--color-primary-soft: #1e3a8a;background-color:var(--bg);color:var(--text)}body.eye-care-mode:not(.dark-mode){--bg: #c7edcc;--bg-surface: #dae5d5;--bg-hover: #c0ddc4;--text: #2d3a2e;--text-secondary: #5a6b5c;--border: #b5cdba;--color-primary-soft: #b8d8a0;background-color:var(--bg);color:var(--text)}body.eye-care-mode.dark-mode{--bg: #1a1f1a;--bg-surface: #232a23;--bg-hover: #2d362d;--text: #d6e0d6;--text-secondary: #9aa89a;--border: #2d362d;--color-primary-soft: #2a3a2a;background-color:var(--bg);color:var(--text)}*,*:before,*:after{box-sizing:border-box}body{font-family:var(--font-sans);line-height:1.6;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;transition:background-color .3s,color .3s}html{font-size:16px}@media screen and (max-width: 768px){html{font-size:15px}}.home-page{display:flex;flex-direction:row}.main-content{display:flex;flex-direction:row;width:100%}.status-message{padding:3rem 2rem;font-size:.88rem;color:var(--text-secondary);text-align:center}.status-message.error{color:var(--color-danger)}