:root[data-theme=light]{--bg-primary: #ffffff;--bg-secondary: #f5f5f5;--bg-tertiary: #e8e8e8;--text-primary: #1a1a1a;--text-secondary: #666666;--text-accent: #50e3c2;--border-color: #e0e0e0;--shadow: rgba(0, 0, 0, .1);--shadow-hover: rgba(0, 0, 0, .15);--tab-active-bg: #50e3c2;--tab-active-text: #000000;--tab-hover-bg: #e6faf6;--button-hover: #f0f0f0;--modal-bg: #ffffff;--close-btn-bg: rgba(0, 0, 0, .1);--close-btn-hover: rgba(0, 0, 0, .2);--close-btn-color: #333;--intro-box-bg: #E5E8E8;--chart-overlay-bg: rgba(80, 227, 194, .95);--blockquote-bg: #f9f9f9;--blockquote-border: #50e3c2}:root[data-theme=dark]{--bg-primary: #1a1a1a;--bg-secondary: #2a2a2a;--bg-tertiary: #363636;--text-primary: #e0e0e0;--text-secondary: #a0a0a0;--text-accent: #50e3c2;--border-color: #404040;--shadow: rgba(0, 0, 0, .3);--shadow-hover: rgba(0, 0, 0, .5);--tab-active-bg: #50e3c2;--tab-active-text: #000000;--tab-hover-bg: #1a3a35;--button-hover: #333333;--modal-bg: #2a2a2a;--close-btn-bg: rgba(255, 255, 255, .1);--close-btn-hover: rgba(255, 255, 255, .2);--close-btn-color: #fff;--intro-box-bg: #2a3a3a;--chart-overlay-bg: rgba(80, 227, 194, .95);--blockquote-bg: #2a2a2a;--blockquote-border: #50e3c2}*{margin:0;padding:0;box-sizing:border-box}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Microsoft JhengHei,Microsoft YaHei,PingFang TC,PingFang SC,Helvetica Neue,Arial,sans-serif;line-height:1.75;background:var(--bg-primary);color:var(--text-primary);margin:0;min-height:100vh;transition:background-color .3s ease,color .3s ease}#root,.app{min-height:100vh;display:flex;flex-direction:column}.container{max-width:1000px;margin:0 auto;padding:0 20px;width:100%}a{color:var(--text-accent);text-decoration:none;transition:opacity .2s}a:hover{opacity:.8}h1,h2,h3,h4,h5,h6{color:var(--text-primary);font-weight:600;margin:1.5em 0 1em}h2{font-size:1.75em;border-bottom:2px solid var(--border-color);padding-bottom:.5em}h3{font-size:1.4em;color:var(--text-accent)}h4{font-size:1.2em}p{margin:1em 0;text-align:justify}ul,ol{margin:1em 0;padding-left:2em}li{margin:.5em 0}hr{border:none;border-top:1px solid var(--border-color);margin:2em 0}img{max-width:100%;height:auto;display:block;margin:1.5em auto;border-radius:8px;box-shadow:0 2px 8px var(--shadow)}blockquote{background:var(--blockquote-bg);border-left:4px solid var(--blockquote-border);padding:1em 1.5em;margin:1.5em 0;border-radius:4px}blockquote p{margin:.5em 0}strong{font-weight:600;color:var(--text-primary)}@media(max-width:768px){body{font-size:16px}.container{padding:0 16px}h2{font-size:1.5em}h3{font-size:1.25em}ul,ol{padding-left:1.5em}}.header{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);padding:1.5rem 0;position:sticky;top:0;z-index:100;box-shadow:0 2px 8px var(--shadow)}.header .container{display:flex;justify-content:space-between;align-items:center;gap:1rem}.title{font-size:1.5rem;margin:0;color:var(--text-primary);font-weight:700;flex:1}.controls{display:flex;gap:1rem;align-items:center}.theme-toggle,.language-toggle{display:flex;gap:.5rem;background:var(--bg-primary);padding:.25rem;border-radius:8px;border:1px solid var(--border-color)}.theme-toggle button,.language-toggle button{border:none;background:transparent;padding:.5rem .75rem;cursor:pointer;border-radius:6px;font-size:1rem;transition:all .2s;color:var(--text-primary);font-weight:500}.theme-toggle button:hover,.language-toggle button:hover{background:var(--button-hover)}.theme-toggle button.active,.language-toggle button.active{background:var(--tab-active-bg);color:var(--tab-active-text)}.tabs{background:var(--bg-secondary);border-bottom:1px solid var(--border-color);overflow-x:auto;position:sticky;top:85px;z-index:99}.tabs .container{display:flex;gap:.5rem;padding:1rem 20px;min-width:max-content}.tab{padding:.75rem 1.5rem;border:none;background:transparent;cursor:pointer;font-size:1rem;font-weight:500;color:var(--text-secondary);border-radius:8px;transition:all .2s;white-space:nowrap}.tab:hover{background:var(--tab-hover-bg);color:var(--text-primary)}.tab.active{background:var(--tab-active-bg);color:var(--tab-active-text);box-shadow:0 2px 8px var(--shadow-hover)}.content{flex:1;padding:2rem 0}.section{animation:fadeIn .3s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}.intro-box{background:var(--intro-box-bg);padding:1.5rem;border-radius:8px;margin:1.5rem 0;line-height:1.8}.chart-link{position:relative;cursor:pointer;overflow:hidden;border-radius:8px;margin:1.5rem 0;transition:transform .3s ease}.chart-link:hover{transform:scale(1.02)}.chart-link img{margin:0;box-shadow:0 4px 12px var(--shadow);transition:filter .3s ease}.chart-link:hover img{filter:brightness(.9)}.chart-overlay{position:absolute;bottom:0;left:0;right:0;background:var(--chart-overlay-bg);color:#fff;padding:1rem;text-align:center;font-weight:600;opacity:0;transition:opacity .3s ease}.chart-link:hover .chart-overlay{opacity:1}.footer{background:var(--bg-secondary);border-top:1px solid var(--border-color);padding:2rem 0;text-align:center;margin-top:auto}.footer p{margin:.5rem 0;color:var(--text-secondary);font-size:.9rem}@media(max-width:768px){.header .container{flex-direction:column;align-items:flex-start}.title{font-size:1.25rem}.controls{width:100%;justify-content:space-between}.theme-toggle,.language-toggle{flex:1}.tabs{top:120px}.tabs .container{padding:.75rem 16px}.tab{padding:.6rem 1rem;font-size:.9rem}.content{padding:1.5rem 0}}@media(max-width:480px){.theme-toggle button,.language-toggle button{padding:.4rem .6rem;font-size:.9rem}}