:root{--bg:#ffffff;--card-bg:#ffffff;--text:#000000;--text-secondary:#555555;--border:#e5e5e5;--shadow:0 2px 4px rgba(0, 0, 0, 0.04);--radius:4px;--nav-height:64px;--max-width:1200px;--font:'Cantarell', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;--tag-bg:#f8f8f8;--tag-active-bg:#e0e0e0;--tag-active-color:#000000;--scroll-btn-bg:rgba(255, 255, 255, 0.9);--scroll-btn-color:#555555;--shuo-submit-color:#ffffff}[data-theme=dark]{--bg:#1e1e1e;--card-bg:#2a2a2a;--text:#eeeeee;--text-secondary:#aaaaaa;--border:#444;--shadow:0 2px 8px rgba(0, 0, 0, 0.3);--tag-bg:#333;--tag-active-bg:#555;--tag-active-color:#ffffff;--btn-bg:#ffffff;--btn-color:#000000;--logo-filter:invert(1);--scroll-btn-bg:rgba(30, 30, 30, 0.9);--scroll-btn-color:#aaaaaa;--shuo-submit-color:#000000}:root{--btn-bg:#000000;--btn-color:#ffffff;--logo-filter:none}[data-theme=dark]{--btn-bg:#ffffff;--btn-color:#000000;--logo-filter:invert(1)}@media(prefers-color-scheme:dark){[data-theme=auto]{--bg:#1e1e1e;--card-bg:#2a2a2a;--text:#eeeeee;--text-secondary:#aaaaaa;--border:#444;--shadow:0 2px 8px rgba(0, 0, 0, 0.3);--tag-bg:#333;--tag-active-bg:#555;--tag-active-color:#ffffff;--btn-bg:#ffffff;--btn-color:#000000;--logo-filter:invert(1);--scroll-btn-bg:rgba(30, 30, 30, 0.9);--scroll-btn-color:#aaaaaa;--shuo-submit-color:#000000}}*{margin:0;padding:0;box-sizing:border-box}html{font-size:17px;scroll-behavior:smooth}body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased;transition:background .3s,color .3s;min-height:100vh;display:flex;flex-direction:column;font-size:1rem}a{color:inherit;text-decoration:none}.site-nav{position:fixed;top:0;left:0;right:0;height:var(--nav-height);background:rgba(255,255,255,.96);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);box-shadow:0 1px 2px rgba(0,0,0,6%);z-index:100;display:flex;align-items:center;padding:0 16px;transition:background .3s,border-color .3s}[data-theme=dark] .site-nav{background:rgba(30,30,30,.96)}@media(prefers-color-scheme:dark){[data-theme=auto] .site-nav{background:rgba(30,30,30,.96)}}.nav-inner{max-width:var(--max-width);width:100%;margin:0 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0}.nav-link.blog-link{color:var(--text-secondary)}.nav-link.blog-link:hover{color:var(--text);background:rgba(0,0,0,5%)}.nav-controls{display:flex;align-items:center;gap:6px;margin-left:8px}.nav-controls .ctrl-btn{background:0 0;border:none;font-size:1.1rem;cursor:pointer;color:var(--text-secondary);padding:2px 6px;border-radius:var(--radius);transition:all .2s;font-family:inherit}.nav-controls .ctrl-btn:hover{background:rgba(0,0,0,5%);color:var(--text)}.nav-toggle{display:none;background:0 0;border:none;font-size:1.5rem;color:var(--text-secondary);cursor:pointer;padding:4px 8px;flex-shrink:0;z-index:101}.nav-overlay{display:none;position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(0,0,0,.3);z-index:999}.nav-close{display:none}@media(max-width:768px){.nav-toggle{display:block}.nav-close{display:block;position:absolute;top:16px;right:16px;background:0 0;border:none;font-size:1.8rem;cursor:pointer;color:var(--text-secondary);padding:4px 8px;line-height:1;z-index:10}.nav-close:hover{color:var(--text)}.nav-links{position:fixed;top:0;right:-100%;width:85%;max-width:320px;height:100vh;background:var(--card-bg);box-shadow:-4px 0 20px rgba(0,0,0,.1);flex-direction:column;align-items:stretch;padding:70px 20px 40px;transition:right .3s ease;overflow-y:auto;z-index:1000;border-left:1px solid var(--border);flex:none;justify-content:flex-start;gap:0;display:flex}.nav-links.open{right:0}.nav-overlay.show{display:block}.nav-links .nav-link,.nav-links .blog-link{padding:14px 16px;font-size:1rem;width:100%;text-align:left;border-radius:0;border-bottom:1px solid var(--border);white-space:normal;display:block}.nav-links .nav-controls{margin-left:0;margin-top:16px;justify-content:flex-start;gap:20px;padding:16px 16px 0;border-top:1px solid var(--border);flex-wrap:wrap}.nav-links .blog-link{display:block}.nav-inner{justify-content:space-between;flex-wrap:nowrap}.nav-logo{margin-right:auto}}.main{max-width:var(--max-width);margin:0 auto;padding:calc(var(--nav-height) + 35px)20px 20px;width:100%;flex:1 0 auto;background:var(--bg);transition:background .3s;display:flex;flex-direction:column}.section{animation:fadeUp .4s ease;flex:1}@keyframes fadeUp{0%{opacity:0;transform:translateY(16px)}100%{opacity:1;transform:translateY(0)}}.section-title{font-size:2.2rem;font-weight:700;letter-spacing:-.5px;margin-bottom:8px;color:var(--text)}.section-desc{font-size:1.05rem;color:var(--text-secondary);margin-bottom:28px;border-left:3px solid var(--text);padding-left:20px;font-weight:300}.footer{max-width:var(--max-width);margin:0 auto;padding:20px;border-top:1px solid var(--border);display:flex;justify-content:space-between;align-items:center;gap:16px;transition:border-color .3s;font-size:.85rem;color:var(--text-secondary);width:100%;flex-shrink:0;background:var(--bg);min-height:64px}.footer .footer-left{display:flex;flex-direction:column;gap:0;font-size:.82rem;align-items:flex-start;line-height:1.3;flex:none}.footer .footer-left .designer{font-size:.75rem;opacity:.7}.footer .footer-center{display:flex;flex-direction:column;align-items:center;gap:6px;flex:1}.footer .footer-center .footer-services{display:flex;align-items:center;gap:0}.footer .footer-center .footer-services a{display:inline-flex;align-items:center;gap:5px;padding:4px 14px;font-size:.82rem;color:var(--text-secondary);text-decoration:none;transition:color .2s;position:relative}.footer .footer-center .footer-services a:not(:last-child)::after{content:'';position:absolute;right:0;top:50%;transform:translateY(-50%);width:1px;height:14px;background:var(--border)}.footer .footer-center .footer-services a:hover{color:var(--text)}.footer .footer-center .footer-services a i{font-size:.9rem}.footer .footer-center .footer-icp{font-size:.75rem;opacity:.7}.footer .footer-center .footer-icp a{color:var(--text-secondary);text-decoration:none}.footer .footer-center .footer-icp a:hover{color:var(--text)}.footer .footer-right{display:flex;flex-direction:column;gap:6px;align-items:flex-end;flex:none}.footer .footer-right .social-row{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;justify-items:center;width:100%}.footer .footer-right .social-row a{color:var(--text-secondary);font-size:1.1rem;transition:color .2s,transform .2s}.footer .footer-right .social-row a:hover{color:var(--text);transform:translateY(-2px)}.scroll-buttons{position:fixed;bottom:100px;right:30px;display:flex;flex-direction:column;gap:8px;z-index:999}.scroll-buttons .scroll-btn{background:var(--scroll-btn-bg);border:none;border-radius:50%;width:40px;height:40px;font-size:1.2rem;cursor:pointer;color:var(--scroll-btn-color);box-shadow:0 4px 12px rgba(0,0,0,.15);backdrop-filter:blur(8px);transition:all .2s;display:flex;align-items:center;justify-content:center}.scroll-buttons .scroll-btn:hover{background:var(--tag-active-bg);color:var(--text)}.scroll-buttons .scroll-btn.hidden{opacity:0;pointer-events:none;transition:opacity .3s}@media(max-width:820px){.scroll-buttons{bottom:80px;right:16px}}@media(max-width:500px){.site-nav{height:56px;padding:0 12px}.nav-logo{font-size:.95rem}.nav-logo img{height:24px}.main{padding:calc(var(--nav-height) + 20px)16px 20px}.section-title{font-size:1.7rem}.section-desc{font-size:.95rem}.footer{flex-direction:column;align-items:center;text-align:center}.footer .footer-left{align-items:center}.footer .footer-right{align-items:center}.scroll-buttons{bottom:70px;right:16px}.scroll-buttons .scroll-btn{width:36px;height:36px;font-size:1rem}}