*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,sans-serif;background:#fff;color:#0f172a;line-height:1.6}a{color:inherit;text-decoration:none}.help-header{position:fixed;top:0;left:0;right:0;height:56px;background:#fff;border-bottom:1px solid #e5e7eb;display:flex;align-items:center;justify-content:space-between;padding:0 24px;z-index:1000}.header-left{display:flex;align-items:center}.logo{display:flex;align-items:center;gap:12px;color:#0f172a}.logo svg{height:24px;width:auto}.logo-divider{width:1px;height:20px;background:#e5e7eb}.logo-text{font-size:15px;font-weight:500;color:#64748b}.header-center{position:relative;flex:1;max-width:400px;margin:0 24px}.search-wrapper{position:relative;display:flex;align-items:center}.search-icon{position:absolute;left:12px;color:#94a3b8;pointer-events:none}#help-search{width:100%;height:36px;padding:0 70px 0 38px;border:1px solid #e5e7eb;border-radius:8px;font-size:14px;background:#f8fafc;color:#0f172a;transition:all .2s}#help-search:focus{outline:none;border-color:#0f172a;background:#fff;box-shadow:0 0 0 3px #0f172a0d}#help-search::placeholder{color:#94a3b8}.search-shortcut{position:absolute;right:12px;font-size:12px;color:#94a3b8;background:#fff;border:1px solid #e5e7eb;padding:2px 6px;border-radius:4px}.search-results{position:absolute;top:calc(100% + 8px);left:0;right:0;background:#fff;border:1px solid #e5e7eb;border-radius:12px;box-shadow:0 20px 40px #0000001a;max-height:400px;overflow-y:auto;display:none;z-index:100}.search-results.active{display:block}.search-result-item{display:block;padding:12px 16px;border-bottom:1px solid #f1f5f9;transition:background .15s}.search-result-item:last-child{border-bottom:none}.search-result-item:hover{background:#f8fafc}.result-title{display:block;font-weight:500;font-size:14px;color:#0f172a;margin-bottom:2px}.result-excerpt{display:block;font-size:13px;color:#64748b}.no-results{padding:24px;text-align:center;color:#64748b;font-size:14px}.header-right{display:flex;align-items:center;gap:16px}.header-link{font-size:14px;color:#64748b;transition:color .2s}.header-link:hover{color:#0f172a}.header-btn{display:flex;align-items:center;gap:4px;height:36px;padding:0 16px;background:#0f172a;color:#fff;font-size:14px;font-weight:500;border-radius:8px;transition:background .2s}.header-btn:hover{background:#1e293b}.help-layout{display:flex;padding-top:56px;min-height:100vh}.help-sidebar{position:fixed;top:56px;left:0;bottom:0;width:260px;background:#fff;border-right:1px solid #e5e7eb;overflow-y:auto;z-index:100}.sidebar-nav{padding:16px 12px}.nav-section{margin-bottom:8px}.nav-section-title{display:block;padding:8px 12px;font-size:11px;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:#64748b}.nav-link{display:flex;align-items:center;gap:10px;padding:8px 12px;font-size:14px;color:#475569;border-radius:6px;transition:all .15s}.nav-link:hover{background:#f1f5f9;color:#0f172a}.nav-link.active{background:#f1f5f9;color:#0f172a;font-weight:500}.nav-link-icon svg{color:#94a3b8}.nav-divider{height:1px;background:#e5e7eb;margin:12px 0}.nav-category-btn{width:100%;display:flex;align-items:center;gap:10px;padding:8px 12px;font-size:14px;color:#475569;background:none;border:none;border-radius:6px;cursor:pointer;transition:all .15s;text-align:left}.nav-category-btn:hover{background:#f1f5f9;color:#0f172a}.category-icon{color:#94a3b8;display:flex;align-items:center}.nav-category-btn span:nth-child(2){flex:1}.chevron{color:#94a3b8;transition:transform .2s}.nav-category.expanded .chevron{transform:rotate(90deg)}.nav-subitems{list-style:none;display:none;padding-left:38px}.nav-category.expanded .nav-subitems{display:block}.nav-subitem{display:block;padding:6px 12px;font-size:13px;color:#64748b;border-radius:6px;transition:all .15s}.nav-subitem:hover{color:#0f172a;background:#f1f5f9}.nav-subitem.active{color:#0f172a;font-weight:500;background:#e2e8f0}.help-main{flex:1;margin-left:260px;background:#fff}.main-content{max-width:720px;margin:0 auto;padding:40px 24px 80px}.breadcrumb{display:flex;align-items:center;gap:8px;font-size:12px;color:#64748b;margin-bottom:24px;flex-wrap:wrap}.breadcrumb a{color:#64748b;transition:color .2s}.breadcrumb a:hover{color:#0f172a}.breadcrumb svg{color:#cbd5e1}.breadcrumb span{color:#0f172a}.help-article{margin-bottom:40px}.help-article h1{font-size:32px;font-weight:600;color:#0f172a;margin-bottom:12px;letter-spacing:-.02em;line-height:1.2}.article-excerpt{font-size:16px;color:#64748b;margin-bottom:32px;padding-bottom:24px;border-bottom:1px solid #e5e7eb;line-height:1.6}.article-content{font-size:15px;line-height:1.7;color:#374151}.article-content h2{font-size:22px;font-weight:600;margin:32px 0 16px;color:#0f172a;letter-spacing:-.01em}.article-content h3{font-size:18px;font-weight:600;margin:24px 0 12px;color:#0f172a}.article-content p{margin-bottom:16px}.article-content ul,.article-content ol{margin:16px 0;padding-left:24px}.article-content li{margin-bottom:8px}.article-content a{color:#2563eb;text-decoration:underline;text-underline-offset:2px}.article-content a:hover{color:#1d4ed8}.article-content code{background:#f1f5f9;padding:2px 6px;border-radius:4px;font-size:13px;font-family:Menlo,Monaco,Courier New,monospace;color:#0f172a}.article-content .help-tip{background:#f0fdf4;border-left:4px solid #22c55e;padding:16px 20px;margin:24px 0;border-radius:0 8px 8px 0}.article-content .help-tip strong{color:#16a34a}.article-nav{display:flex;gap:16px;margin-bottom:32px}.nav-prev,.nav-next{flex:1;display:flex;align-items:center;gap:12px;padding:16px;background:#fff;border:1px solid #e5e7eb;border-radius:10px;transition:all .2s}.nav-prev:hover,.nav-next:hover{border-color:#cbd5e1;box-shadow:0 2px 8px #0000000a}.nav-next{justify-content:flex-end;text-align:right}.nav-prev svg,.nav-next svg{color:#94a3b8;flex-shrink:0}.nav-label{display:block;font-size:11px;color:#94a3b8;text-transform:uppercase;letter-spacing:.05em;margin-bottom:2px}.nav-title{display:block;font-size:14px;font-weight:500;color:#0f172a}.article-feedback{background:#f8fafc;border:1px solid #e5e7eb;border-radius:10px;padding:20px;text-align:center}.article-feedback p{font-size:14px;color:#475569;margin-bottom:12px}.feedback-buttons{display:flex;justify-content:center;gap:12px}.feedback-btn{display:flex;align-items:center;gap:6px;padding:8px 16px;background:#fff;border:1px solid #e5e7eb;border-radius:6px;font-size:14px;color:#475569;cursor:pointer;transition:all .15s}.feedback-btn:hover{background:#f1f5f9;border-color:#cbd5e1}.feedback-btn svg{color:#94a3b8}.feedback-thanks{color:#16a34a;font-weight:500}.mobile-menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:8px;margin-left:8px}.hamburger{display:block;width:20px;height:2px;background:#0f172a;position:relative;transition:background .2s}.hamburger:before,.hamburger:after{content:"";position:absolute;left:0;width:20px;height:2px;background:#0f172a;transition:transform .2s}.hamburger:before{top:-6px}.hamburger:after{top:6px}.mobile-menu-toggle.active .hamburger{background:transparent}.mobile-menu-toggle.active .hamburger:before{transform:rotate(45deg) translate(4px,4px)}.mobile-menu-toggle.active .hamburger:after{transform:rotate(-45deg) translate(4px,-4px)}.desktop-only{display:flex}@media(max-width:1024px){.help-sidebar{transform:translate(-100%);transition:transform .3s}.help-sidebar.mobile-open{transform:translate(0)}.help-main{margin-left:0}.mobile-menu-toggle{display:block}.desktop-only{display:none}}@media(max-width:768px){.header-center,.header-right .header-link{display:none}.main-content{padding:24px 16px 60px}.help-article h1{font-size:26px}.article-nav{flex-direction:column}.nav-next{justify-content:flex-start;text-align:left}}