:root{--primary: #4f46e5;--primary-hover: #4338ca;--primary-light: #e0e7ff;--bg: #ffffff;--bg-secondary: #f8fafc;--bg-card: #ffffff;--text: #1e293b;--text-secondary: #64748b;--border: #e2e8f0;--shadow: 0 1px 3px rgba(0,0,0,.1);--shadow-lg: 0 4px 6px -1px rgba(0,0,0,.1);--radius: 8px;--radius-lg: 12px;--transition: .2s ease}[data-theme=dark]{--primary: #818cf8;--primary-hover: #6366f1;--primary-light: #1e1b4b;--bg: #0f172a;--bg-secondary: #1e293b;--bg-card: #1e293b;--text: #f1f5f9;--text-secondary: #94a3b8;--border: #334155;--shadow: 0 1px 3px rgba(0,0,0,.3);--shadow-lg: 0 4px 6px -1px rgba(0,0,0,.3)}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,sans-serif;background:var(--bg);color:var(--text);line-height:1.6;min-height:100vh;display:flex;flex-direction:column}a{color:var(--primary);text-decoration:none;transition:color var(--transition)}a:hover{color:var(--primary-hover)}img{max-width:100%;height:auto}.container{max-width:1200px;margin:0 auto;padding:0 20px}header.site-header{background:var(--bg-card);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:100;backdrop-filter:blur(8px)}header.site-header .container{display:flex;align-items:center;justify-content:space-between;padding-top:12px;padding-bottom:12px;gap:16px}.logo{display:flex;align-items:center;gap:8px;font-size:1.25rem;font-weight:700;color:var(--text);text-decoration:none}.logo svg{width:28px;height:28px;color:var(--primary)}nav.main-nav{display:flex;align-items:center;gap:24px}nav.main-nav a{color:var(--text-secondary);font-size:.9rem;font-weight:500;transition:color var(--transition)}nav.main-nav a:hover,nav.main-nav a.active{color:var(--primary)}.header-controls{display:flex;align-items:center;gap:12px}.theme-toggle{background:none;border:1px solid var(--border);border-radius:var(--radius);padding:6px 8px;cursor:pointer;color:var(--text-secondary);font-size:1.1rem;display:flex;align-items:center;justify-content:center;transition:all var(--transition)}.theme-toggle:hover{background:var(--bg-secondary);color:var(--primary)}.lang-select{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:6px 8px;font-size:.85rem;color:var(--text);cursor:pointer}.lang-select:focus{outline:2px solid var(--primary);outline-offset:-2px}.mobile-menu-btn{display:none;background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text);padding:4px}.hero{text-align:center;padding:60px 20px 40px;background:linear-gradient(135deg,var(--primary-light) 0%,var(--bg) 100%)}[data-theme=dark] .hero{background:linear-gradient(135deg,var(--primary-light) 0%,var(--bg) 100%)}.hero h1{font-size:2.5rem;font-weight:800;margin-bottom:12px;background:linear-gradient(135deg,var(--primary),#7c3aed);-webkit-background-clip:text;-webkit-text-fill-color:transparent;background-clip:text}.hero p{font-size:1.15rem;color:var(--text-secondary);max-width:600px;margin:0 auto 20px}.badges{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.badge{display:inline-flex;align-items:center;gap:4px;padding:4px 12px;border-radius:20px;font-size:.8rem;font-weight:600;background:var(--bg-card);border:1px solid var(--border);color:var(--text-secondary)}.grid-tool-section{padding:40px 0}.grid-tool-container{display:grid;grid-template-columns:320px 1fr;gap:24px;align-items:start}.controls-panel{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;position:sticky;top:80px;max-height:calc(100vh - 100px);overflow-y:auto}.controls-panel::-webkit-scrollbar{width:4px}.controls-panel::-webkit-scrollbar-thumb{background:var(--border);border-radius:2px}.control-section{margin-bottom:20px;padding-bottom:16px;border-bottom:1px solid var(--border)}.control-section:last-child{margin-bottom:0;padding-bottom:0;border-bottom:none}.control-section h3{font-size:.8rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:12px}.control-group{margin-bottom:12px}.control-group:last-child{margin-bottom:0}.control-group label{display:block;font-size:.85rem;font-weight:500;color:var(--text);margin-bottom:4px}.control-group input[type=range]{width:100%;accent-color:var(--primary)}.control-group input[type=number],.control-group select{width:100%;padding:8px 10px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg);color:var(--text);font-size:.85rem}.control-group input[type=number]:focus,.control-group select:focus{outline:2px solid var(--primary);outline-offset:-2px}.control-group input[type=color]{width:40px;height:34px;padding:2px;border:1px solid var(--border);border-radius:var(--radius);cursor:pointer;background:var(--bg)}.control-row{display:flex;gap:12px;align-items:flex-end}.control-row .control-group{flex:1}.control-row-colors{display:flex;gap:12px;align-items:center}.control-row-colors .control-group{flex:1;display:flex;align-items:center;gap:8px}.control-row-colors .control-group label{margin-bottom:0;white-space:nowrap}.range-row{display:flex;align-items:center;gap:8px}.range-row input[type=range]{flex:1}.range-value{font-size:.85rem;color:var(--text-secondary);min-width:36px;text-align:right}.control-group input[type=checkbox]{margin-right:6px;accent-color:var(--primary)}.checkbox-label{display:flex;align-items:center;font-size:.85rem;cursor:pointer}.canvas-preview{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px;display:flex;flex-direction:column;align-items:center}.canvas-wrapper{position:relative;display:inline-block;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:repeating-conic-gradient(#e5e7eb 0% 25%,transparent 0% 50%) 0 0 / 16px 16px}[data-theme=dark] .canvas-wrapper{background:repeating-conic-gradient(#374151 0% 25%,transparent 0% 50%) 0 0 / 16px 16px}.canvas-wrapper canvas{display:block;max-width:100%;height:auto}.canvas-wrapper.dragover{outline:3px dashed var(--primary);outline-offset:-3px}.drop-overlay{position:absolute;inset:0;background:#4f46e526;display:none;align-items:center;justify-content:center;font-size:1.1rem;font-weight:600;color:var(--primary);pointer-events:none}.canvas-wrapper.dragover .drop-overlay{display:flex}.export-buttons{display:flex;gap:8px;margin-top:16px;flex-wrap:wrap;justify-content:center}.btn{display:inline-flex;align-items:center;gap:6px;padding:8px 16px;border:1px solid var(--border);border-radius:var(--radius);font-size:.85rem;font-weight:500;cursor:pointer;transition:all var(--transition);background:var(--bg);color:var(--text)}.btn:hover{background:var(--bg-secondary);border-color:var(--primary);color:var(--primary)}.btn-primary{background:var(--primary);color:#fff;border-color:var(--primary)}.btn-primary:hover{background:var(--primary-hover);border-color:var(--primary-hover);color:#fff}.btn-share{background:transparent;border-style:dashed}.btn-reset{background:transparent;color:var(--text-secondary);border-color:transparent}.btn-reset:hover{color:#ef4444;border-color:#ef4444;background:transparent}.preset-row{display:flex;gap:8px;align-items:flex-end}.preset-row .control-group{flex:1}.golden-ratio-btn{padding:8px 12px;font-size:.8rem;white-space:nowrap}.features-section{padding:60px 0;background:var(--bg-secondary)}.features-section h2{text-align:center;font-size:2rem;font-weight:700;margin-bottom:40px}.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}.feature-card{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px;transition:all var(--transition)}.feature-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-2px)}.feature-card .icon{font-size:2rem;margin-bottom:12px}.feature-card h3{font-size:1.1rem;font-weight:600;margin-bottom:8px}.feature-card p{font-size:.9rem;color:var(--text-secondary)}.history-section{padding:60px 0}.history-section h2{text-align:center;font-size:2rem;font-weight:700;margin-bottom:16px}.history-section>.container>p{text-align:center;color:var(--text-secondary);max-width:700px;margin:0 auto 32px}.history-timeline{max-width:700px;margin:0 auto}.timeline-item{display:flex;gap:16px;margin-bottom:20px}.timeline-year{font-weight:700;color:var(--primary);min-width:60px;font-size:.95rem}.timeline-text{font-size:.95rem;color:var(--text-secondary)}.benefits-section{padding:60px 0;background:var(--bg-secondary)}.benefits-section h2{text-align:center;font-size:2rem;font-weight:700;margin-bottom:40px}.benefits-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;max-width:800px;margin:0 auto}.benefit-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:20px}.benefit-item h3{font-size:1rem;font-weight:600;margin-bottom:6px;color:var(--primary)}.benefit-item p{font-size:.9rem;color:var(--text-secondary)}.keywords-section{padding:40px 0;text-align:center}.keywords-section h2{font-size:1.5rem;font-weight:700;margin-bottom:16px}.keywords-section p{color:var(--text-secondary);margin-bottom:20px}.keyword-tags{display:flex;flex-wrap:wrap;justify-content:center;gap:8px}.keyword-tag{padding:6px 14px;border-radius:20px;font-size:.8rem;background:var(--bg-secondary);border:1px solid var(--border);color:var(--text-secondary)}.cta-section{padding:60px 0;text-align:center;background:linear-gradient(135deg,var(--primary-light) 0%,var(--bg) 100%)}.cta-section h2{font-size:2rem;font-weight:700;margin-bottom:12px}.cta-section p{color:var(--text-secondary);margin-bottom:24px}footer.site-footer{background:var(--bg-secondary);border-top:1px solid var(--border);padding:40px 0 20px;margin-top:auto}.footer-content{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:32px;margin-bottom:32px}.footer-brand p{font-size:.9rem;color:var(--text-secondary);margin-top:8px}.footer-links h4{font-size:.85rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;color:var(--text-secondary);margin-bottom:12px}.footer-links ul{list-style:none}.footer-links li{margin-bottom:6px}.footer-links a{font-size:.9rem;color:var(--text-secondary)}.footer-links a:hover{color:var(--primary)}.footer-social{display:flex;gap:12px;margin-top:12px}.footer-social a{display:flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:var(--radius);background:var(--bg);border:1px solid var(--border);color:var(--text-secondary);transition:all var(--transition)}.footer-social a:hover{color:var(--primary);border-color:var(--primary)}.footer-bottom{border-top:1px solid var(--border);padding-top:16px;display:flex;justify-content:space-between;align-items:center}.footer-bottom p{font-size:.8rem;color:var(--text-secondary)}.footer-bottom-links{display:flex;gap:16px}.footer-bottom-links a{font-size:.8rem;color:var(--text-secondary)}.page-content{max-width:800px;margin:0 auto;padding:40px 20px}.page-content h1{font-size:2rem;font-weight:700;margin-bottom:24px}.page-content h2{font-size:1.4rem;font-weight:600;margin-top:32px;margin-bottom:12px}.page-content p{color:var(--text-secondary);margin-bottom:16px}.page-content ul{color:var(--text-secondary);margin-bottom:16px;padding-left:24px}.page-content li{margin-bottom:6px}.contact-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-top:24px}.contact-card{background:var(--bg-secondary);border:1px solid var(--border);border-radius:var(--radius-lg);padding:24px}.contact-card h3{font-size:1.1rem;font-weight:600;margin-bottom:8px;color:var(--primary)}.contact-card p,.contact-card a{font-size:.95rem;color:var(--text-secondary)}.toast{position:fixed;bottom:24px;right:24px;background:var(--primary);color:#fff;padding:12px 20px;border-radius:var(--radius);font-size:.9rem;font-weight:500;box-shadow:var(--shadow-lg);z-index:1000;transform:translateY(100px);opacity:0;transition:all .3s ease}.toast.show{transform:translateY(0);opacity:1}@media(max-width:900px){.grid-tool-container{grid-template-columns:1fr}.controls-panel{position:static;max-height:none}.features-grid,.benefits-grid{grid-template-columns:1fr}.footer-content{grid-template-columns:1fr 1fr}}@media(max-width:640px){.hero h1{font-size:1.75rem}nav.main-nav{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg-card);border-bottom:1px solid var(--border);flex-direction:column;padding:16px 20px;gap:12px}nav.main-nav.open{display:flex}.mobile-menu-btn{display:block}.control-row{flex-direction:column}.export-buttons{flex-direction:column;align-items:stretch}.contact-grid,.footer-content{grid-template-columns:1fr}.footer-bottom{flex-direction:column;gap:8px;text-align:center}}