:root{--font-body:'Inter',system-ui,-apple-system,sans-serif;--font-heading:'Outfit',system-ui,-apple-system,sans-serif;--bg-base:#090d16;--bg-surface:#111827;--bg-surface-elevated:#1f293d;--bg-card:#162032;--bg-input:#0d1424;--border-subtle:#26354a;--border-active:#38bdf8;--text-main:#f1f5f9;--text-muted:#94a3b8;--text-dim:#64748b;--brand-green:#22c55e;--brand-cyan:#38bdf8;--brand-blue:#2563eb;--brand-purple:#8b5cf6;--danger:#ef4444;--warning:#f59e0b;--canvas-bg:#0a0e17;--canvas-grid:#1a2538;--canvas-block:#38bdf8;--canvas-border:#0284c7;--shadow-sm:0 2px 4px rgba(0,0,0,0.3);--shadow-md:0 6px 16px rgba(0,0,0,0.4);--shadow-lg:0 12px 32px rgba(0,0,0,0.5);--radius-sm:6px;--radius-md:10px;--radius-lg:16px;--radius-xl:22px}[data-theme="light"]{--bg-base:#f8fafc;--bg-surface:#ffffff;--bg-surface-elevated:#f1f5f9;--bg-card:#ffffff;--bg-input:#f8fafc;--border-subtle:#e2e8f0;--border-active:#0284c7;--text-main:#0f172a;--text-muted:#475569;--text-dim:#94a3b8;--canvas-bg:#f1f5f9;--canvas-grid:#cbd5e1;--canvas-block:#0284c7;--canvas-border:#0369a1;--shadow-sm:0 2px 4px rgba(0,0,0,0.06);--shadow-md:0 6px 16px rgba(0,0,0,0.08);--shadow-lg:0 12px 32px rgba(0,0,0,0.12)}*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}body{font-family:var(--font-body);background:var(--bg-base);color:var(--text-main);line-height:1.6;overflow-x:hidden;min-height:100vh;display:flex;flex-direction:column}a{color:var(--brand-cyan);text-decoration:none;transition:color 0.2s}a:hover{color:var(--brand-green);text-decoration:none}img{max-width:100%;height:auto;display:block}button,input,select{font-family:inherit}.site-wrapper{width:100%;max-width:1320px;margin:0 auto;padding:0 20px}.site-header{background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);position:sticky;top:0;z-index:1000;box-shadow:var(--shadow-sm)}.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:20px}.site-brand{display:flex;align-items:center;gap:10px;font-family:var(--font-heading);font-weight:800;font-size:1.35rem;color:var(--text-main)}.brand-icon{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--brand-green),var(--brand-cyan));display:flex;align-items:center;justify-content:center;color:#090d16;font-weight:900;font-size:1.1rem;box-shadow:0 0 14px rgba(34,197,94,0.4)}.nav-menu{display:flex;align-items:center;gap:8px;list-style:none}.nav-item{position:relative}.nav-link{display:flex;align-items:center;gap:6px;padding:8px 14px;border-radius:var(--radius-sm);color:var(--text-main);font-size:0.92rem;font-weight:600;cursor:pointer;background:transparent;border:none}.nav-link:hover,.nav-link:focus{background:var(--bg-surface-elevated);color:var(--brand-cyan)}.nav-link svg{width:14px;height:14px;transition:transform 0.2s}.nav-dropdown{position:absolute;top:100%;left:0;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);padding:18px;display:none;width:580px;grid-template-columns:repeat(2,1fr);gap:10px;z-index:1100}.nav-dropdown.show,.nav-item:hover .nav-dropdown{display:grid}.dropdown-link{display:flex;flex-direction:column;gap:3px;padding:10px 12px;border-radius:var(--radius-sm);color:var(--text-main);background:var(--bg-card);border:1px solid transparent;transition:all 0.2s}.dropdown-link:hover{background:var(--bg-surface-elevated);border-color:var(--border-active);transform:translateY(-1px)}.dropdown-link strong{font-size:0.88rem;color:var(--brand-cyan)}.dropdown-link span{font-size:0.75rem;color:var(--text-muted)}.header-actions{display:flex;align-items:center;gap:12px}.theme-toggle{background:var(--bg-surface-elevated);border:1px solid var(--border-subtle);color:var(--text-main);width:40px;height:40px;border-radius:50%;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.2s}.theme-toggle:hover{border-color:var(--border-active);color:var(--brand-cyan)}.theme-toggle svg{width:18px;height:18px}.mobile-toggle{display:none;background:transparent;border:none;color:var(--text-main);cursor:pointer;padding:8px}.mobile-toggle svg{width:24px;height:24px}.breadcrumb-bar{background:var(--bg-surface);border-bottom:1px solid var(--border-subtle);padding:10px 0;font-size:0.85rem}.breadcrumb-list{display:flex;align-items:center;gap:8px;list-style:none;flex-wrap:wrap}.breadcrumb-list li{display:flex;align-items:center;gap:8px;color:var(--text-muted)}.breadcrumb-list li a{color:var(--text-muted);font-weight:500}.breadcrumb-list li a:hover{color:var(--brand-cyan)}.breadcrumb-separator{color:var(--text-dim);font-size:0.75rem}.hero-section{padding:36px 0 24px;text-align:center}.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgba(56,189,248,0.12);border:1px solid rgba(56,189,248,0.3);color:var(--brand-cyan);font-size:0.82rem;font-weight:700;text-transform:uppercase;letter-spacing:0.05em;margin-bottom:14px}.hero-title{font-family:var(--font-heading);font-size:2.6rem;font-weight:800;letter-spacing:-0.03em;line-height:1.2;margin-bottom:12px;background:linear-gradient(135deg,var(--text-main) 30%,var(--brand-cyan) 100%);-webkit-background-clip:text;-webkit-text-fill-color:transparent}.hero-subtitle{font-size:1.1rem;color:var(--text-muted);max-width:800px;margin:0 auto 28px}.app-container{background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);box-shadow:var(--shadow-lg);padding:24px;margin-bottom:40px}.app-grid{display:grid;grid-template-columns:360px 1fr;gap:24px;align-items:start}.controls-panel{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:20px;display:flex;flex-direction:column;gap:18px}.panel-section-title{font-family:var(--font-heading);font-size:0.95rem;font-weight:700;color:var(--text-main);display:flex;align-items:center;gap:8px;text-transform:uppercase;letter-spacing:0.04em}.form-group{display:flex;flex-direction:column;gap:6px}.form-label{font-size:0.85rem;font-weight:600;color:var(--text-muted);display:flex;justify-content:space-between;align-items:center}.form-control{background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);color:var(--text-main);padding:10px 12px;font-size:0.92rem;transition:border-color 0.2s}.form-control:focus{outline:none;border-color:var(--border-active);box-shadow:0 0 0 3px rgba(56,189,248,0.15)}.form-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.range-group{display:flex;align-items:center;gap:10px}.range-input{flex:1;-webkit-appearance:none;height:6px;background:var(--bg-input);border-radius:3px;outline:none}.range-input::-webkit-slider-thumb{-webkit-appearance:none;width:18px;height:18px;border-radius:50%;background:var(--brand-cyan);cursor:pointer;box-shadow:0 0 8px rgba(56,189,248,0.6)}.pill-group{display:flex;background:var(--bg-input);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:3px;gap:2px}.pill-btn{flex:1;background:transparent;border:none;color:var(--text-muted);padding:8px 10px;font-size:0.82rem;font-weight:600;border-radius:var(--radius-sm);cursor:pointer;transition:all 0.2s;text-align:center}.pill-btn.active{background:var(--brand-cyan);color:#090d16}.toggle-row{display:flex;align-items:center;justify-content:space-between;cursor:pointer}.toggle-switch{position:relative;width:44px;height:24px}.toggle-switch input{opacity:0;width:0;height:0}.slider{position:absolute;cursor:pointer;inset:0;background:var(--bg-input);border:1px solid var(--border-subtle);transition:.3s;border-radius:24px}.slider:before{position:absolute;content:"";height:16px;width:16px;left:3px;bottom:3px;background:var(--text-muted);transition:.3s;border-radius:50%}input:checked + .slider{background:var(--brand-cyan);border-color:var(--brand-cyan)}input:checked + .slider:before{transform:translateX(20px);background:#090d16}.validation-msg{font-size:0.78rem;color:var(--danger);min-height:16px}.action-buttons{display:flex;flex-direction:column;gap:10px;margin-top:6px}.btn-primary{background:linear-gradient(135deg,var(--brand-cyan),var(--brand-blue));color:#ffffff;border:none;padding:12px 20px;border-radius:var(--radius-md);font-weight:700;font-size:0.95rem;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:8px;box-shadow:0 4px 14px rgba(56,189,248,0.3);transition:all 0.2s}.btn-primary:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 6px 20px rgba(56,189,248,0.4)}.btn-primary:disabled{opacity:0.6;cursor:not-allowed}.btn-secondary{background:var(--bg-surface-elevated);color:var(--text-main);border:1px solid var(--border-subtle);padding:10px 16px;border-radius:var(--radius-md);font-weight:600;font-size:0.88rem;cursor:pointer;display:flex;align-items:center;justify-content:center;gap:6px;transition:all 0.2s}.btn-secondary:hover{border-color:var(--border-active);color:var(--brand-cyan)}.preview-panel{display:flex;flex-direction:column;gap:18px}.stats-cards{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.stat-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:12px 14px;display:flex;flex-direction:column;gap:4px}.stat-label{font-size:0.75rem;text-transform:uppercase;letter-spacing:0.04em;color:var(--text-muted);font-weight:700}.stat-value{font-family:var(--font-heading);font-size:1.35rem;font-weight:800;color:var(--brand-cyan)}.stat-desc{font-size:0.75rem;color:var(--text-dim)}.canvas-wrapper{background:var(--canvas-bg);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);position:relative;overflow:hidden;min-height:480px;display:flex;align-items:center;justify-content:center}.canvas-toolbar{position:absolute;top:12px;left:12px;display:flex;gap:6px;z-index:10;background:rgba(17,24,39,0.85);backdrop-filter:blur(6px);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:4px}.tool-btn{background:transparent;border:none;color:var(--text-main);width:32px;height:32px;border-radius:4px;display:flex;align-items:center;justify-content:center;cursor:pointer;transition:all 0.2s}.tool-btn:hover{background:var(--bg-surface-elevated);color:var(--brand-cyan)}.tool-btn svg{width:16px;height:16px}.canvas-info-badge{position:absolute;bottom:12px;left:12px;background:rgba(17,24,39,0.85);backdrop-filter:blur(6px);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:6px 12px;font-size:0.8rem;color:var(--text-muted);z-index:10;display:flex;gap:12px}.canvas-info-badge strong{color:var(--brand-cyan)}#circleCanvas{display:block;cursor:grab;touch-action:none}#circleCanvas:active{cursor:grabbing}.export-bar{display:flex;flex-wrap:wrap;gap:10px;justify-content:space-between;align-items:center;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:12px 16px}.export-left,.export-right{display:flex;gap:8px;flex-wrap:wrap}.more-tools-section{padding:30px 0 45px}.section-header{text-align:center;margin-bottom:28px}.section-badge{display:inline-block;padding:4px 12px;border-radius:999px;background:rgba(34,197,94,0.12);border:1px solid rgba(34,197,94,0.3);color:var(--brand-green);font-size:0.8rem;font-weight:700;text-transform:uppercase;letter-spacing:0.04em;margin-bottom:8px}.section-title{font-family:var(--font-heading);font-size:1.85rem;font-weight:800;color:var(--text-main);letter-spacing:-0.02em}.section-desc{font-size:0.95rem;color:var(--text-muted);max-width:650px;margin:6px auto 0}.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:12px}.tool-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);padding:14px 16px;display:flex;align-items:center;gap:12px;transition:all 0.2s}.tool-card:hover{border-color:var(--border-active);transform:translateY(-2px);background:var(--bg-surface-elevated)}.tool-card-icon{width:36px;height:36px;border-radius:8px;background:rgba(56,189,248,0.12);display:flex;align-items:center;justify-content:center;color:var(--brand-cyan);flex-shrink:0}.tool-card-icon svg{width:18px;height:18px}.tool-card-info{display:flex;flex-direction:column;gap:2px}.tool-card-title{font-size:0.88rem;font-weight:700;color:var(--text-main)}.tool-card-tag{font-size:0.75rem;color:var(--text-muted)}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-bottom:50px}.feature-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:22px;display:flex;flex-direction:column;gap:10px;transition:transform 0.2s}.feature-card:hover{transform:translateY(-2px);border-color:var(--border-active)}.feature-icon{width:44px;height:44px;border-radius:10px;background:linear-gradient(135deg,rgba(56,189,248,0.2),rgba(37,99,235,0.2));display:flex;align-items:center;justify-content:center;color:var(--brand-cyan)}.feature-icon svg{width:22px;height:22px}.feature-title{font-family:var(--font-heading);font-size:1.1rem;font-weight:700;color:var(--text-main)}.feature-desc{font-size:0.88rem;color:var(--text-muted);line-height:1.55}.steps-container{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:55px}.step-card{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:22px 18px;display:flex;flex-direction:column;gap:10px;position:relative}.step-num{width:32px;height:32px;border-radius:50%;background:var(--brand-cyan);color:#090d16;font-weight:800;font-size:0.95rem;display:flex;align-items:center;justify-content:center}.step-title{font-family:var(--font-heading);font-size:1.02rem;font-weight:700;color:var(--text-main)}.step-desc{font-size:0.85rem;color:var(--text-muted);line-height:1.5}.seo-article{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-xl);padding:36px;margin-bottom:50px}.seo-article h2{font-family:var(--font-heading);font-size:1.6rem;font-weight:800;color:var(--text-main);margin:24px 0 12px;letter-spacing:-0.02em}.seo-article h2:first-child{margin-top:0}.seo-article h3{font-family:var(--font-heading);font-size:1.25rem;font-weight:700;color:var(--brand-cyan);margin:20px 0 10px}.seo-article p{font-size:0.95rem;color:var(--text-muted);line-height:1.75;margin-bottom:16px}.seo-article ul{padding-left:22px;margin-bottom:18px;color:var(--text-muted);font-size:0.95rem;line-height:1.7}.seo-article li{margin-bottom:6px}.faq-section{margin-bottom:50px}.faq-list{display:flex;flex-direction:column;gap:12px;max-width:860px;margin:0 auto}.faq-item{background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-md);overflow:hidden}.faq-question{width:100%;text-align:left;background:transparent;border:none;padding:16px 20px;font-family:var(--font-heading);font-size:1.02rem;font-weight:700;color:var(--text-main);display:flex;align-items:center;justify-content:space-between;gap:16px;cursor:pointer}.faq-question svg{width:18px;height:18px;color:var(--brand-cyan);transition:transform 0.2s}.faq-item.active .faq-question svg{transform:rotate(180deg)}.faq-answer{padding:0 20px 18px;color:var(--text-muted);font-size:0.92rem;line-height:1.65;display:none}.faq-item.active .faq-answer{display:block}.cta-banner{background:linear-gradient(135deg,rgba(37,99,235,0.15),rgba(56,189,248,0.15));border:1px solid rgba(56,189,248,0.3);border-radius:var(--radius-xl);padding:44px 30px;text-align:center;margin-bottom:55px}.cta-title{font-family:var(--font-heading);font-size:2rem;font-weight:800;color:var(--text-main);margin-bottom:10px}.cta-desc{font-size:1.05rem;color:var(--text-muted);max-width:640px;margin:0 auto 24px}.cta-buttons{display:flex;justify-content:center;gap:14px;flex-wrap:wrap}.site-footer{background:var(--bg-surface);border-top:1px solid var(--border-subtle);padding:50px 0 24px;margin-top:auto}.footer-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-bottom:36px}.footer-col h4{font-family:var(--font-heading);font-size:0.95rem;font-weight:700;color:var(--text-main);margin-bottom:14px;text-transform:uppercase;letter-spacing:0.04em}.footer-links{list-style:none;display:flex;flex-direction:column;gap:8px}.footer-links a{color:var(--text-muted);font-size:0.84rem;transition:color 0.2s}.footer-links a:hover{color:var(--brand-cyan)}.footer-bottom{border-top:1px solid var(--border-subtle);padding-top:24px;display:flex;flex-direction:column;align-items:center;text-align:center;gap:12px;font-size:0.82rem;color:var(--text-dim)}.footer-disclaimer{max-width:800px;line-height:1.6}.cookie-banner{position:fixed;bottom:20px;left:20px;right:20px;max-width:540px;background:var(--bg-surface);border:1px solid var(--border-subtle);border-radius:var(--radius-lg);padding:18px 20px;box-shadow:var(--shadow-lg);z-index:9999;display:flex;flex-direction:column;gap:12px;animation:slideUp 0.3s ease-out}@keyframes slideUp{from{transform:translateY(100%);opacity:0}to{transform:translateY(0);opacity:1}}.cookie-text{font-size:0.85rem;color:var(--text-muted);line-height:1.5}.cookie-text a{color:var(--brand-cyan);text-decoration:underline}.cookie-actions{display:flex;gap:10px;justify-content:flex-end}.toast-msg{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--brand-green);color:#090d16;font-weight:700;padding:10px 20px;border-radius:var(--radius-md);box-shadow:var(--shadow-md);z-index:10000;font-size:0.88rem;transition:transform 0.3s cubic-bezier(0.175,0.885,0.32,1.275);pointer-events:none}.toast-msg.show{transform:translateX(-50%) translateY(0)}@media(max-width:1024px){.app-grid{grid-template-columns:1fr}.stats-cards{grid-template-columns:repeat(2,1fr)}.features-grid{grid-template-columns:repeat(2,1fr)}.steps-container{grid-template-columns:repeat(2,1fr)}.footer-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:768px){.hero-title{font-size:2rem}.nav-menu{display:none}.mobile-toggle{display:block}.features-grid{grid-template-columns:1fr}.steps-container{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}.stats-cards{grid-template-columns:repeat(2,1fr)}.canvas-wrapper{min-height:360px}}.segment-item{display:flex;align-items:center;justify-content:space-between;background:var(--bg-card);border:1px solid var(--border-subtle);border-radius:var(--radius-sm);padding:10px 14px;margin-bottom:8px}.segment-preview-chip{padding:4px 8px;border-radius:4px;font-family:'Courier New',Courier,monospace;font-size:0.85rem}.interactive-chat-box{background:rgba(0,0,0,0.75);border-radius:8px;padding:18px 20px;font-family:'Courier New',Courier,monospace;font-size:1.05rem;min-height:90px;color:#fff;text-shadow:2px 2px #000;display:flex;align-items:center;flex-wrap:wrap;gap:4px;position:relative}.chat-seg-interactive{cursor:pointer;transition:text-shadow 0.15s;position:relative}.chat-seg-interactive:hover{text-shadow:0 0 8px #38bdf8,2px 2px #000}.chat-tooltip{position:absolute;bottom:100%;left:50%;transform:translateX(-50%) translateY(-6px);background:#111827;border:1px solid #38bdf8;color:#f8fafc;padding:6px 10px;border-radius:4px;font-size:0.8rem;white-space:nowrap;pointer-events:none;z-index:100;box-shadow:0 4px 12px rgba(0,0,0,0.5);display:none}.chat-seg-interactive:hover .chat-tooltip{display:block}