:root{--bg-body:#f8fafc;--bg-card:#fff;--bg-card-subtle:#f1f5f9;--border-color:#e2e8f0;--border-color-hover:#cbd5e1;--text-main:#334155;--text-muted:#64748b;--text-heading:#0f172a;--primary-blue:#2563eb;--primary-blue-hover:#1d4ed8;--accent-green:#059669;--accent-purple:#7c3aed;--accent-orange:#d97706;--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--shadow-sm:0 1px 2px 0 rgba(0,0,0,.05);--shadow-md:0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);--shadow-lg:0 10px 15px -3px rgba(0,0,0,.1), 0 4px 6px -2px rgba(0,0,0,.05)}*{box-sizing:border-box;margin:0;padding:0}body{background-color:var(--bg-body);color:var(--text-main);flex-direction:column;min-height:100vh;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Open Sans,Helvetica Neue,sans-serif;line-height:1.6;display:flex}.site-container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}.site-header{background:var(--bg-card);border-bottom:1px solid var(--border-color);box-shadow:var(--shadow-sm);position:relative}.header-inner{justify-content:space-between;align-items:center;height:64px;display:flex}.logo-brand{color:var(--text-heading);align-items:center;gap:10px;font-size:18px;font-weight:700;text-decoration:none;display:flex}.logo-icon{background:linear-gradient(135deg, var(--primary-blue), var(--accent-purple));color:#fff;border-radius:var(--radius-sm);justify-content:center;align-items:center;width:32px;height:32px;font-size:16px;display:flex}.site-nav{align-items:center;gap:20px;list-style:none;display:flex}.nav-link{color:var(--text-muted);font-size:14px;font-weight:500;text-decoration:none;transition:color .2s}.nav-link:hover,.nav-link.active{color:var(--primary-blue)}.nav-dropdown{position:relative}.dropdown-menu{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:200;min-width:180px;padding:8px 0;display:none;position:absolute;top:100%;left:0}.nav-dropdown:hover .dropdown-menu{display:block}.dropdown-item{color:var(--text-main);padding:8px 16px;font-size:13px;text-decoration:none;transition:background .2s;display:block}.dropdown-item:hover{background:var(--bg-card-subtle);color:var(--primary-blue)}.breadcrumb-wrapper{padding:16px 0 8px}.breadcrumbs{color:var(--text-muted);align-items:center;gap:8px;font-size:13px;list-style:none;display:flex}.breadcrumbs a{color:var(--primary-blue);text-decoration:none}.breadcrumbs a:hover{text-decoration:underline}.breadcrumbs .separator{color:var(--text-muted);font-size:11px}.main-wrapper{flex:1;padding:24px 0 48px}.hero-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);text-align:center;margin-bottom:32px;padding:36px 40px}.hero-title{color:var(--text-heading);letter-spacing:-.02em;margin-bottom:12px;font-size:32px;font-weight:800}.hero-subtitle{color:var(--text-muted);max-width:760px;margin:0 auto 28px;font-size:16px}.downloader-box{max-width:820px;margin:0 auto}.input-group{gap:12px;display:flex;position:relative}.url-input{-webkit-appearance:none;-moz-appearance:none;-ms-appearance:none;appearance:none;border:2px solid var(--border-color);border-radius:var(--radius-md);height:56px;min-height:56px;color:var(--text-heading);background:#fff;outline:none;flex:1;padding:0 20px;font-size:16px;transition:border-color .2s,box-shadow .2s}.url-input:focus{border-color:var(--primary-blue);box-shadow:0 0 0 3px rgba(37,99,235,.15)}.btn-primary{background:var(--primary-blue);color:#fff;border-radius:var(--radius-md);cursor:pointer;white-space:nowrap;border:none;align-items:center;gap:8px;height:56px;padding:0 32px;font-size:16px;font-weight:600;transition:background .2s,transform .1s;display:inline-flex}.btn-primary:hover{background:var(--primary-blue-hover)}.btn-primary:active{transform:scale(.98)}.options-row{color:var(--text-muted);justify-content:space-between;align-items:center;margin-top:16px;font-size:13px;display:flex}.toggle-label{cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;align-items:center;gap:8px;display:flex}.privacy-badge{color:var(--accent-green);align-items:center;gap:6px;font-weight:500;display:inline-flex}.code-generator-card{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-md);box-shadow:var(--shadow-sm);margin-bottom:32px;padding:24px}.code-header{justify-content:space-between;align-items:center;margin-bottom:14px;display:flex}.code-title{color:var(--text-heading);font-size:16px;font-weight:700}.btn-copy{background:var(--primary-blue);border:1px solid var(--primary-blue);border-radius:var(--radius-sm);color:#fff;cursor:pointer;align-items:center;gap:6px;padding:8px 16px;font-size:13px;font-weight:700;transition:all .2s;display:inline-flex;box-shadow:0 2px 8px rgba(79,70,229,.25)}.btn-copy:hover{background:var(--primary-blue-hover);border-color:var(--primary-blue-hover);transform:translateY(-1px);box-shadow:0 4px 14px rgba(79,70,229,.4)}.code-block{color:#f8fafc;border-radius:var(--radius-sm);white-space:pre-wrap;word-break:break-all;background:#0f172a;padding:16px;font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;font-size:13px;position:relative;overflow-x:auto}.tab-selector{gap:8px;margin-bottom:12px;display:flex}.tab-btn{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-sm);color:var(--text-muted);cursor:pointer;padding:6px 14px;font-size:12px;font-weight:600}.tab-btn.active{background:var(--primary-blue);color:#fff;border-color:var(--primary-blue)}.guide-inline-card{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);opacity:0;max-width:820px;max-height:0;margin:20px auto 0;padding:0 24px;transition:max-height .4s cubic-bezier(.4,0,.2,1),opacity .3s,padding .3s,margin .3s;overflow:hidden}.guide-inline-card.expanded{opacity:1;max-height:500px;margin-top:24px;padding:24px}@keyframes card-pulse{0%{transform:scale(1)}50%{border-color:var(--primary-blue);transform:scale(1.015);box-shadow:0 4px 16px rgba(37,99,235,.15)}to{transform:scale(1)}}.card-pulse{animation:.35s cubic-bezier(.4,0,.2,1) card-pulse}.progress-bar-container{background:#cbd5e1;border-radius:4px;width:100%;height:8px;margin:14px 0 20px;overflow:hidden}.progress-bar-fill{background:linear-gradient(90deg, var(--primary-blue), var(--accent-purple));width:0%;height:100%;transition:width .4s linear}.guide-anim-card{border:1px solid var(--border-color);border-radius:var(--radius-md);text-align:center;box-shadow:var(--shadow-sm);background:#fff;padding:20px;position:relative}.mock-button{background:var(--primary-blue);border-radius:var(--radius-sm);cursor:pointer;box-shadow:var(--shadow-sm);margin-bottom:12px;padding:10px 24px;font-size:14px;font-weight:600;text-decoration:none;transition:transform .1s,background .2s;display:inline-block;color:#fff!important}.mock-button:hover{background:var(--primary-blue-hover)}.mock-context-menu{border:1px solid var(--border-color);border-radius:var(--radius-sm);width:200px;box-shadow:var(--shadow-md);text-align:left;background:#fff;margin:0 auto;padding:6px 0}.mock-menu-line{color:var(--text-main);padding:7px 14px;font-size:12px}.mock-menu-line.highlight{background:var(--primary-blue);color:#fff;font-weight:600}.anim-controls{justify-content:center;align-items:center;gap:12px;margin-top:14px;display:flex}.btn-anim-ctrl{border:1px solid var(--border-color);border-radius:var(--radius-sm);cursor:pointer;color:var(--text-main);background:#fff;padding:5px 12px;font-size:12px;font-weight:500;transition:background .2s}.btn-anim-ctrl:hover{background:var(--bg-card-subtle)}.pro-tip-box{border-radius:var(--radius-sm);color:var(--text-main);text-align:left;background:rgba(88,166,255,.08);border:1px solid rgba(88,166,255,.25);align-items:flex-start;gap:10px;margin-top:12px;padding:10px 14px;font-size:12px;line-height:1.5;display:flex}.pro-tip-icon{color:#d97706;flex-shrink:0;justify-content:center;align-items:center;margin-top:1px;display:inline-flex}.loading-status-box{border-radius:var(--radius-sm);text-align:left;background:#fff;border:1px dashed #a5b4fc;align-items:flex-start;gap:14px;margin-top:16px;padding:14px 16px;display:flex;box-shadow:0 2px 8px rgba(79,70,229,.06)}.loading-spinner{border:3px solid #e2e8f0;border-top-color:var(--primary-blue);border-radius:50%;flex-shrink:0;width:24px;height:24px;margin-top:2px;animation:.8s linear infinite spin}@keyframes spin{0%{transform:rotate(0)}to{transform:rotate(360deg)}}.loading-status-text strong{color:var(--text-heading);margin-bottom:4px;font-size:13px;display:block}.loading-status-text p{color:var(--text-muted);margin:0;font-size:12px;line-height:1.5}.article-section{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-bottom:32px;padding:32px 36px}.article-section h1{color:var(--text-heading);margin-bottom:12px;font-size:24px;font-weight:800}.article-intro{color:var(--text-muted);margin-bottom:24px;font-size:15px}.accordion-item{border:1px solid var(--border-color);border-radius:var(--radius-md);margin-bottom:14px;overflow:hidden}.accordion-header{background:var(--bg-card-subtle);cursor:pointer;-webkit-user-select:none;-moz-user-select:none;-ms-user-select:none;user-select:none;justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.accordion-header h2{color:var(--text-heading);font-size:16px;font-weight:700}.accordion-icon{font-size:14px;transition:transform .2s}.accordion-item.active .accordion-icon{transform:rotate(180deg)}.accordion-body{color:var(--text-main);background:#fff;padding:20px;font-size:14px;line-height:1.7;display:none}.accordion-item.active .accordion-body{display:block}.step-list{margin:12px 0;padding-left:20px}.step-list li{margin-bottom:8px}.related-guides-section{background:var(--bg-card);border:1px solid var(--border-color);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm);margin-top:32px;padding:28px 32px}.related-guides-title{color:var(--text-heading);align-items:center;gap:8px;margin-bottom:8px;font-size:20px;font-weight:700;display:flex}.related-guides-intro{color:var(--text-muted);margin-bottom:20px;font-size:14px}.related-guides-grid{grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:16px;display:grid}.related-guide-card{background:var(--bg-body);border:1px solid var(--border-color);border-radius:var(--radius-md);padding:16px;transition:all .2s}.related-guide-card:hover{border-color:var(--primary-blue);box-shadow:var(--shadow-md);transform:translateY(-2px)}.related-guide-card h3{color:var(--text-heading);margin-bottom:8px;font-size:15px;font-weight:600}.related-guide-card h3 a{color:var(--primary-blue);text-decoration:none}.related-guide-card h3 a:hover{text-decoration:underline}.related-guide-card p{color:var(--text-main);font-size:13px;line-height:1.5}.related-inline-link{color:var(--primary-blue);font-weight:600;text-decoration:none}.related-inline-link:hover{text-decoration:underline}.site-footer{background:var(--bg-card);border-top:1px solid var(--border-color);margin-top:auto;padding:40px 0 24px}.footer-matrix{grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:32px;display:grid}.footer-link-card{background:var(--bg-card-subtle);border:1px solid var(--border-color);border-radius:var(--radius-md);text-align:center;padding:16px;transition:border-color .2s}.footer-link-card:hover{border-color:var(--primary-blue)}.footer-link-card a{color:var(--primary-blue);justify-content:center;align-items:center;gap:8px;font-size:14px;font-weight:600;text-decoration:none;display:inline-flex}.footer-bottom{border-top:1px solid var(--border-color);color:var(--text-muted);justify-content:space-between;align-items:center;padding-top:20px;font-size:13px;display:flex}@media (max-width:768px){.site-container{padding:0 12px}.header-inner{flex-direction:column;gap:12px;height:auto;padding:12px 0}.site-nav{flex-wrap:wrap;justify-content:center;gap:12px}.input-group{flex-direction:column;gap:10px}.url-input{-webkit-appearance:none;-moz-appearance:none;-ms-appearance:none;appearance:none;width:100%;height:56px;min-height:56px;padding:0 16px;font-size:16px;display:block}.btn-primary{justify-content:center;height:52px;font-size:16px}.hero-card{padding:20px 14px}.hero-title{font-size:22px}.downloader-box{margin-top:16px;padding:14px}.guide-inline-card.expanded{max-height:600px;margin-top:14px;padding:14px 12px}.guide-anim-card{padding:12px 10px}.pro-tip-box{margin-top:10px;padding:8px 10px}.footer-matrix{grid-template-columns:1fr 1fr}}#btnStartDownload{text-decoration:none}