:root{--bg-main:#f8fafc;--bg-card:#fff;--bg-card-hover:#f1f5f9;--border-color:#e2e8f0;--border-highlight:#0284c7;--text-main:#0f172a;--text-muted:#64748b;--primary:#0284c7;--primary-glow:#0284c726;--accent:#4f46e5;--accent-purple:#7c3aed;--tag-bg:#e0f2fe}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100%}body{background-color:var(--bg-main);color:var(--text-main);flex-direction:column;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;line-height:1.65;display:flex}h1,h2,h3,h4,h5,h6{color:var(--text-main)}img,svg,video,iframe{max-width:100%;height:auto}pre,code,table{max-width:100%}a{color:inherit;text-decoration:none}.container{width:100%;max-width:1200px;margin:0 auto;padding:0 1.25rem}header.site-header{z-index:50;-webkit-backdrop-filter:blur(16px);border-bottom:1px solid var(--border-color);background-color:#ffffffeb;width:100%;position:sticky;top:0;box-shadow:0 1px 3px #00000008}.header-inner{justify-content:space-between;align-items:center;gap:1rem;width:100%;min-width:0;height:4.25rem;display:flex}.brand-logo{letter-spacing:-.02em;white-space:nowrap;flex-shrink:0;align-items:center;gap:.75rem;font-size:1.2rem;font-weight:800;display:flex}.brand-icon{width:32px;height:32px;box-shadow:0 0 12px var(--primary-glow);border-radius:8px;display:block}.brand-gradient{background:linear-gradient(135deg,#0284c7 0%,#4f46e5 100%);-webkit-text-fill-color:transparent;-webkit-background-clip:text}.desktop-nav{flex:1;justify-content:center;align-items:center;min-width:0;display:flex}.nav-links{align-items:center;gap:.35rem;margin:0;padding:0;list-style:none;display:flex}.nav-item a{color:#475569;white-space:nowrap;border-radius:6px;padding:.4rem .65rem;font-size:.88rem;font-weight:500;transition:all .2s;display:block}.nav-item a:hover,.nav-item.active a{color:var(--primary);background-color:#0284c714}.nav-item.active a{color:var(--primary);font-weight:600}.header-actions{flex-shrink:0;align-items:center;gap:.75rem;display:flex}.header-search{min-width:170px;max-width:240px;position:relative}.search-input-wrap{align-items:center;display:flex;position:relative}.search-icon{width:16px;height:16px;color:var(--text-muted);pointer-events:none;position:absolute;left:.75rem}.search-input{border:1px solid var(--border-color);width:100%;color:var(--text-main);background-color:#f1f5f9;border-radius:9999px;outline:none;padding:.42rem .75rem .42rem 2.15rem;font-size:.84rem;transition:all .2s}.search-input:focus{border-color:var(--primary);box-shadow:0 0 10px var(--primary-glow);background-color:#fff}.search-dropdown{border:1px solid var(--border-color);z-index:100;background:#fff;border-radius:12px;flex-direction:column;width:320px;max-width:calc(100vw - 2rem);max-height:400px;display:none;position:absolute;top:115%;right:0;overflow-y:auto;box-shadow:0 12px 30px #00000014}.search-dropdown.active{display:flex}.search-result-item{border-bottom:1px solid var(--border-color);padding:.75rem 1rem;transition:background-color .15s}.search-result-item:hover{background-color:#f8fafc}.search-result-item .item-title{color:var(--text-main);margin-bottom:.2rem;font-size:.9rem;font-weight:600}.search-result-item .item-sub{color:var(--text-muted);font-size:.75rem}.mobile-toggle{border:1px solid var(--border-color);color:#334155;cursor:pointer;background:#f1f5f9;border-radius:8px;flex-direction:column;flex-shrink:0;justify-content:center;align-items:center;gap:5px;width:38px;height:38px;padding:0;transition:all .2s;display:none}.mobile-toggle:hover{border-color:var(--primary);background:#0284c714}.mobile-toggle .bar{background-color:#334155;border-radius:2px;width:18px;height:2px;transition:transform .2s,opacity .2s}.mobile-toggle.active .bar:first-child{transform:translateY(7px)rotate(45deg)}.mobile-toggle.active .bar:nth-child(2){opacity:0}.mobile-toggle.active .bar:nth-child(3){transform:translateY(-7px)rotate(-45deg)}.mobile-drawer{border-top:1px solid var(--border-color);border-bottom:1px solid var(--border-color);background:#fffffffa;max-height:75vh;padding:1rem 0 1.25rem;display:none;overflow-y:auto}.mobile-drawer.active{display:block}.mobile-nav-grid{grid-template-columns:repeat(2,1fr);gap:.5rem;margin:0;padding:0;list-style:none;display:grid}.mobile-nav-item a{border:1px solid var(--border-color);color:#334155;text-align:center;background:#f8fafc;border-radius:8px;justify-content:center;align-items:center;padding:.65rem .5rem;font-size:.88rem;font-weight:500;transition:all .15s;display:flex}.mobile-nav-item a:hover,.mobile-nav-item.active a{border-color:var(--primary);color:var(--primary);background:#0284c714;font-weight:600}.mobile-subnav{border-top:1px solid var(--border-color);-webkit-overflow-scrolling:touch;scrollbar-width:none;background:#fff;width:100%;max-width:100%;display:none;overflow-x:auto}.mobile-subnav::-webkit-scrollbar{display:none}.mobile-subnav-list{align-items:center;gap:.35rem;width:max-content;min-width:100%;margin:0;padding:.45rem 1rem;list-style:none;display:flex}.mobile-subnav-item a{color:var(--text-muted);white-space:nowrap;background:#f1f5f9;border:1px solid #0000;border-radius:9999px;padding:.25rem .65rem;font-size:.8rem;transition:all .15s;display:inline-block}.mobile-subnav-item.active a,.mobile-subnav-item a:hover{color:var(--primary);background:#0284c714;border-color:#0284c740;font-weight:600}main{flex:1;padding:2rem 0 4rem}footer.site-footer{border-top:1px solid var(--border-color);color:var(--text-muted);background-color:#fff;padding:3rem 0 2rem;font-size:.88rem}.footer-grid{grid-template-columns:2fr 1fr 1fr 1.5fr;gap:2.5rem;margin-bottom:2.5rem;display:grid}.footer-col h3{color:var(--text-main);margin-bottom:1rem;font-size:1rem;font-weight:700}.footer-col ul{flex-direction:column;gap:.5rem;list-style:none;display:flex}.footer-col a:hover{color:var(--primary)}.footer-bottom{border-top:1px solid var(--border-color);text-align:center;padding-top:1.5rem;font-size:.8rem}@media (width<=992px){.desktop-nav{display:none!important}.mobile-toggle{display:flex!important}.mobile-subnav{display:block!important}.footer-grid{grid-template-columns:1fr 1fr}}@media (width<=768px){.header-inner{gap:.5rem;height:3.6rem;padding:0 .85rem}.brand-logo{gap:.5rem;font-size:1.05rem}.brand-icon{width:28px;height:28px}.header-actions{gap:.5rem}.header-search{width:140px;min-width:0;max-width:160px}.search-input{padding:.38rem .5rem .38rem 1.9rem;font-size:.78rem}.search-icon{width:14px;height:14px;left:.55rem}.search-dropdown{width:calc(100vw - 1.5rem);max-width:320px;left:auto;right:0}.footer-grid{grid-template-columns:1fr;gap:1.5rem}}@media (width<=360px){.header-search{width:110px}.brand-gradient{font-size:.95rem}}