:root{--primary:#2563eb;--primary-dark:#1d4ed8;--success:#16a34a;--success-dark:#15803d;--secondary:#f3f4f6;--background:#f9fafb;--card-bg:#fff;--border:#e5e7eb;--text:#1f2937;--text-light:#6b7280;--radius:1rem;--shadow:0 2px 8px rgba(0, 0, 0, 0.04);--transition:0.2s cubic-bezier(.4, 0, .2, 1)}.body-bg,body{background:var(--background);color:var(--text);font-family:'Segoe UI',Roboto,Arial,sans-serif;margin:0;min-height:100vh}.container{max-width:1200px;margin:0 auto;padding:0 1.5rem}.header{background:#fff;box-shadow:0 1px 0 var(--border);border-bottom:1px solid var(--border);position:sticky;top:0;z-index:10}.header-flex{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 0}.logo-title .site-logo{font-size:2.5rem;font-weight:800;color:var(--primary);letter-spacing:-1px;user-select:none;margin:0}.lang-selector{display:flex;align-items:center;gap:1rem}.lang-label{font-size:1rem;color:var(--text-light);font-weight:500}.form-select{border:1px solid var(--border);border-radius:.5rem;padding:.5rem 1rem;font-size:1rem;background:#fff;color:var(--text);transition:border-color var(--transition)}.form-select:focus{border-color:var(--primary);outline:0}.main-content{max-width:1200px;margin:0 auto;padding:2rem 1.5rem 3rem 1.5rem}.main-title-section{margin-bottom:2.5rem}.main-title{font-size:2.2rem;font-weight:700;color:var(--text);margin-bottom:.5rem}.main-subtitle{font-size:1.25rem;color:var(--text-light);max-width:600px;margin:0 auto}.main-grid{display:grid;gap:2rem;place-items:center}@media (min-width:1024px){.main-grid{place-items:initial}}.sidebar{display:none}@media (min-width:1024px){.sidebar{display:block}.sidebar-sticky{position:sticky;top:2rem}}.ad-space{background:var(--secondary);border:2px dashed var(--border);border-radius:var(--radius);min-height:10rem;display:flex;align-items:center;justify-content:center;margin-bottom:1.5rem}.ad-label{color:var(--text-light);font-size:1rem}.content-ad{display:none}@media (min-width:640px){.content-ad{display:flex;height:8rem;margin:2rem 0;align-items:center;justify-content:center}}.card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);padding:2rem 1.5rem;margin-bottom:2rem}.upload-card{width:100%;max-width:500px;margin-bottom:2rem}.section-title{font-size:1.3rem;font-weight:600;color:var(--text);margin-bottom:1.2rem}.section-subtitle{font-size:1.1rem;font-weight:600;margin-bottom:.5rem}.section-subtitle-blue{color:var(--primary)}.section-desc{color:var(--text-light);margin-bottom:1.2rem}.form-group{margin-bottom:1.2rem}.form-label{display:block;font-size:1rem;color:var(--text-light);margin-bottom:.3rem}.form-row{display:flex;gap:1rem;margin-bottom:1.2rem}.button{display:inline-block;font-size:1rem;font-weight:500;padding:.75rem 1.5rem;border-radius:.5rem;border:none;cursor:pointer;transition:background var(--transition),color 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ease}.drag-over,.upload-area:focus,.upload-area:hover{border-color:var(--primary);background-color:#eff6ff}.upload-prompt{margin-bottom:1rem}.upload-title{font-size:1.1rem;font-weight:500;color:var(--text)}.upload-desc{font-size:.95rem;color:var(--text-light)}.file-input{display:none}.image-preview{display:none;margin-top:1rem}.image-preview.active{display:block}.preview-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem}@media (max-width:640px){.preview-grid{grid-template-columns:1fr}}.error-message{display:none;margin-top:1rem;padding:1rem;background:#fef2f2;border:1px solid #fecaca;border-radius:.5rem}.error-message.active{display:block}.error-text{color:#dc2626;font-size:1rem}.progress-container{display:none;margin-top:1rem}.progress-container.active{display:block}.progress-labels{display:flex;justify-content:space-between;font-size:.95rem;color:var(--text-light);margin-bottom:.5rem}.progress-bar-bg{width:100%;background:#e5e7eb;border-radius:1rem;height:.5rem}.progress-bar{background:var(--primary);height:.5rem;border-radius:1rem;width:0%;transition:width .3s ease}.toggle-row{display:flex;align-items:center;margin-bottom:1.2rem}.toggle-checkbox{margin-right:.5rem}.toggle-label{font-size:1rem;color:var(--text-light);cursor:pointer;user-select:none}.results-section{display:none;margin-bottom:2rem}.results-section.active{display:block}.results-container{display:flex;flex-direction:column;gap:1.5rem}.cta-section{text-align:center;margin-top:2.5rem}.cta-text{font-size:1.3rem;font-weight:600;color:var(--primary);margin-bottom:1rem}.share-buttons{display:flex;flex-wrap:wrap;gap:.75rem;justify-content:center}.share-btn{display:inline-flex;align-items:center;gap:.5rem;padding:.6rem 1.2rem;border-radius:.5rem;font-size:1rem;font-weight:500;color:#fff;background:var(--primary);border:none;cursor:pointer;transition:background var(--transition);text-decoration:none}.share-btn.facebook{background:#1877f2}.share-btn.whatsapp{background:#25d366}.share-btn.twitter{background:#1da1f2}.share-btn.linkedin{background:#0077b5}.share-btn.tiktok{background:#000}.share-btn.instagram{background:linear-gradient(90deg,#fd5,#ff543e,#c837ab)}.share-btn.kwai{background:#ff9100}.share-btn.copy-link{background:#6b7280}.share-btn:focus,.share-btn:hover{filter:brightness(.92)}.features-grid{display:grid;grid-template-columns:1fr;gap:1.5rem;margin:3rem 0}@media (min-width:768px){.features-grid{grid-template-columns:repeat(3,1fr)}}.feature-card{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);padding:2rem 1.5rem;text-align:center}.feature-icon{width:3rem;height:3rem;border-radius:.75rem;display:flex;align-items:center;justify-content:center;margin:0 auto 1rem auto}.feature-icon-blue{background:#dbeafe}.feature-icon-green{background:#dcfce7}.feature-icon-purple{background:#ede9fe}.feature-title{font-size:1.1rem;font-weight:600;color:var(--text);margin-bottom:.5rem}.feature-desc{color:var(--text-light);font-size:1rem}.info-section{max-width:800px;margin:4rem auto 0 auto;display:flex;flex-direction:column;gap:3rem}.faq-section,.guide-section,.how-to-section,.key-features-section,.tips-section,.use-cases-section,.why-choose-section{background:var(--card-bg);border-radius:var(--radius);box-shadow:var(--shadow);border:1px solid var(--border);padding:2rem 1.5rem}.features-list,.tips-list{list-style:disc inside;color:var(--text-light);font-size:1rem;margin:0;padding-left:1.2rem}.use-cases-grid{display:grid;grid-template-columns:1fr;gap:1rem}@media (min-width:640px){.use-cases-grid{grid-template-columns:1fr 1fr}}.use-case-card{background:var(--secondary);border-radius:.75rem;border:1px solid var(--border);padding:1rem}.use-case-title{font-weight:600;color:var(--text);margin-bottom:.3rem}.use-case-desc{color:var(--text-light);font-size:.98rem}.how-to-list{list-style:decimal inside;color:var(--text-light);font-size:1rem;margin:0;padding-left:1.2rem}.ready-title{font-weight:600;color:var(--text);margin-top:1.2rem}.ready-desc{color:var(--text-light);margin-bottom:1rem}.ready-btn-row{margin-top:1rem}.start-btn{min-width:200px}.faq-title{margin-bottom:1.2rem}.faq-list{display:flex;flex-direction:column;gap:1rem}.faq-item{background:var(--secondary);border-radius:.75rem;border:1px solid var(--border);padding:1rem}.faq-question{font-weight:600;color:var(--text);cursor:pointer}.faq-answer{color:var(--text-light);margin-top:.5rem;font-size:.98rem}.modal{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:1000;align-items:center;justify-content:center}.modal.active{display:flex}.modal-content{background:#fff;border-radius:var(--radius);padding:2rem 1.5rem;max-width:400px;width:100%;box-shadow:var(--shadow);position:relative}.modal-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.modal-title{font-size:1.1rem;font-weight:600;color:var(--text)}.modal-close{background:0 0;border:none;color:var(--text-light);font-size:1.5rem;cursor:pointer;transition:color var(--transition)}.modal-close:focus,.modal-close:hover{color:var(--primary)}.camera-video{width:100%;border-radius:.75rem;margin-bottom:1rem}.modal-footer{display:flex;justify-content:center}.capture-btn{min-width:150px}.active{display:block!important}.progress-bar{transition:width .3s ease}.drag-over{border-color:#3b82f6;background-color:#eff6ff}.upload-area{transition:all .2s ease}.upload-area:hover{border-color:#60a5fa}.main-section{max-width:700px;width:100%;margin:0 auto;padding:0 1.5rem;display:flex;flex-direction:column;align-items:center}