:root{--primary:#4361ee;--primary-dark:#3a0ca3;--secondary:#7209b7;--radius:8px;--radius-xl:20px;--success:#06d6a0;--danger:#e63946;--warning:#f8961e}#app-content[data-theme=dark]{--bg-body:#0f172a;--bg-card:#1e293b;--text-primary:#f1f5f9;--text-secondary:#94a3b8;--text-muted:#64748b;--border:#334155;--shadow:0 4px 24px rgba(0,0,0,0.3);--primary-light:rgba(67,97,238,0.12)}#app-content[data-theme=light]{--bg-body:#f8fafc;--bg-card:#ffffff;--text-primary:#1e293b;--text-secondary:#475569;--text-muted:#94a3b8;--border:#e2e8f0;--shadow:0 4px 24px rgba(67,97,238,0.08);--primary-light:rgba(67,97,238,0.08)}.hero-section{padding:120px 0 80px;background:linear-gradient(135deg, #4361ee 0%, #3a0ca3 50%, #7209b7 100%);color:#fff;position:relative;overflow:hidden}.hero-section::after{content:"";position:absolute;bottom:-2px;left:0;right:0;height:60px;background:var(--bg-body);clip-path:ellipse(55% 100% at 50% 100%)}.hero-title{font-size:clamp(1.8rem,4vw,2.8rem);font-weight:800;margin-bottom:12px}.hero-desc{font-size:1.05rem;opacity:.9;max-width:560px}.tool-wrapper{margin-top:-30px;position:relative;z-index:10;padding-bottom:2rem}.tool-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:2rem;box-shadow:var(--shadow);border:1px solid var(--border)}.drop-zone{border:2.5px dashed var(--primary);border-radius:16px;padding:2.5rem 1.5rem;text-align:center;background:var(--primary-light);cursor:pointer;transition:all .3s;margin-bottom:1.5rem}.drop-zone:hover,.drop-zone.over{border-color:var(--success);background:rgba(6,214,160,.1)}.drop-icon{width:72px;height:72px;background:linear-gradient(135deg, var(--primary), #c084fc);border-radius:50%;display:flex;align-items:center;justify-content:center;margin:0 auto 1rem;font-size:1.8rem;color:#fff;box-shadow:0 8px 24px rgba(99,102,241,.3)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:.85rem 1.8rem;border-radius:12px;font-weight:700;font-size:.95rem;border:none;cursor:pointer;transition:all .3s;font-family:inherit;min-height:44px}.btn-primary{background:var(--primary);color:#fff;box-shadow:0 10px 20px rgba(99,102,241,.3)}.btn-primary:hover{background:var(--primary-dark);transform:translateY(-3px);box-shadow:0 15px 30px rgba(99,102,241,.4)}.btn-secondary{background:var(--primary-light);color:var(--text-primary);border:1px solid var(--border)}.btn-secondary:hover{border-color:var(--primary);transform:translateY(-2px)}.btn-accent{background:linear-gradient(135deg, #06d6a0 0%, #38f9d7 100%);color:#0f172a;box-shadow:0 10px 20px rgba(6,214,160,.3)}.btn-accent:hover{transform:translateY(-3px);box-shadow:0 15px 30px rgba(6,214,160,.4)}.btn-sm{padding:.6rem 1.2rem;font-size:.85rem}.btn-row{display:flex;gap:.75rem;justify-content:center;flex-wrap:wrap}.loading-overlay{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(15,23,42,.9);display:none;align-items:center;justify-content:center;flex-direction:column;z-index:9999;backdrop-filter:blur(8px)}.loading-spinner{width:60px;height:60px;border:4px solid hsla(0,0%,100%,.1);border-top-color:var(--primary);border-radius:50%;animation:spin .8s linear infinite;margin-bottom:1.5rem}@keyframes spin{to{transform:rotate(360deg)}}.notification{position:fixed;bottom:30px;left:50%;transform:translateX(-50%);padding:16px 32px;border-radius:15px;color:#fff;font-weight:600;z-index:10001;box-shadow:0 20px 40px rgba(0,0,0,.3);font-size:1rem;max-width:90vw;text-align:center;display:none}.content-card{background:var(--bg-card);border-radius:var(--radius-xl);padding:40px;margin-bottom:28px;box-shadow:var(--shadow);border:1px solid var(--border)}.content-card h2{font-size:1.4rem;margin-bottom:16px;color:var(--text-primary)}.content-card h3{font-size:1.2rem;margin:24px 0 12px;color:var(--text-primary)}.content-card p{color:var(--text-secondary);margin-bottom:14px;line-height:1.8}.content-card ul{color:var(--text-secondary);margin-bottom:14px;padding-left:20px}.content-card ul li{margin-bottom:6px}.trust-bar{display:flex;justify-content:center;gap:2rem;padding:1.5rem 0;flex-wrap:wrap}.trust-item{display:flex;align-items:center;gap:8px;color:var(--text-secondary);font-size:.85rem}.trust-item i{color:var(--primary);font-size:1rem}.related-tools{padding:40px 0}.related-tools h2{font-size:1.8rem;margin-bottom:10px}.related-tools>p{color:var(--text-secondary);margin-bottom:30px}.related-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(200px, 1fr));gap:16px}.related-card{background:var(--bg-card);border:1px solid var(--border);padding:20px;border-radius:12px;text-align:center;text-decoration:none;color:var(--text-primary);transition:all .3s;display:flex;flex-direction:column;align-items:center;gap:10px}.related-card:hover{background:var(--primary-light);border-color:var(--primary);transform:translateY(-4px)}.related-name{font-weight:700;font-size:.9rem}.related-desc{font-size:.78rem;color:var(--text-secondary)}.faq-section{padding:0}.faq-list{margin-top:20px}.faq-item{background:var(--bg-card);border:1px solid var(--border);border-radius:var(--radius-xl);margin-bottom:12px;overflow:hidden}.faq-question{padding:20px 25px;cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-weight:600;color:var(--text-primary);background:none;border:none;width:100%;text-align:left;font-size:1rem;font-family:inherit}.faq-question i{transition:transform .3s;color:var(--primary)}.faq-item.open .faq-question i{transform:rotate(180deg)}.faq-answer{padding:0 25px;max-height:0;overflow:hidden;transition:all .4s;color:var(--text-secondary);display:none}.faq-item.open .faq-answer{max-height:300px;padding:0 25px 20px;display:block}.case-studies .case-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(250px, 1fr));gap:16px;margin-top:20px}.case-card{background:var(--primary-light);border:1px solid var(--border);border-radius:15px;padding:1.5rem;transition:all .3s}.case-card:hover{transform:translateY(-4px);border-color:var(--primary)}.case-number{background:var(--primary);color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:.9rem;margin-bottom:12px}.case-card h3{font-size:1rem;margin-bottom:8px;color:var(--text-primary)}.case-detail{font-size:.85rem;color:var(--text-secondary);margin-bottom:4px;line-height:1.5}.usage-guide h2{font-size:1.6rem;margin-bottom:1.5rem}.step{display:flex;gap:16px;margin-bottom:20px;align-items:flex-start}.step-num{background:var(--primary);color:#fff;width:36px;height:36px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.step-content h3{font-size:1rem;margin-bottom:4px}.step-content p{color:var(--text-secondary);font-size:.9rem;margin:0}.opt-grid{display:grid;grid-template-columns:1fr 1fr;gap:1rem;margin-bottom:1.5rem;margin-top:1.5rem}.opt-box{background:var(--primary-light);border:1px solid var(--border);border-radius:12px;padding:1rem 1.15rem}.opt-box label{display:flex;align-items:center;gap:6px;font-weight:600;font-size:.88rem;color:var(--text-primary);margin-bottom:.5rem}.opt-box label i{color:var(--primary)}.opt-box select{width:100%;padding:.6rem .8rem;border:1px solid var(--border);border-radius:8px;font-size:.9rem;background:var(--bg-body);color:var(--text-primary);font-family:inherit;cursor:pointer}.opt-box select:focus{border-color:var(--primary);outline:none}.preview-sec{display:none;margin-top:1.5rem;animation:slideUp .4s ease}.preview-sec.active{display:block}.preview-sec canvas{max-width:100%;height:auto;border-radius:12px;border:1px solid var(--border);margin-bottom:1rem}.prog-bar-wrap{height:6px;background:var(--border);border-radius:3px;overflow:hidden;margin-top:1.25rem;display:none}.prog-bar-wrap.active{display:block}.prog-fill{height:100%;background:linear-gradient(90deg, var(--primary), #c084fc);width:0%;border-radius:3px;transition:width .25s}#floatThemeToggle{position:fixed;top:100px;right:20px;width:48px;height:48px;background:var(--bg-card);border:1px solid var(--border);border-radius:50%;cursor:pointer;z-index:1000;display:flex;align-items:center;justify-content:center;color:var(--text-primary);font-size:1.2rem;box-shadow:var(--shadow);transition:all .3s}#floatThemeToggle:hover{background:var(--primary);color:#fff;border-color:var(--primary)}#backToTop{position:fixed;bottom:30px;right:20px;width:48px;height:48px;background:var(--primary);border:none;border-radius:50%;cursor:pointer;z-index:1000;display:none;align-items:center;justify-content:center;color:#fff;font-size:1.2rem;box-shadow:0 10px 20px rgba(0,0,0,.2);transition:all .3s}#backToTop:hover{background:var(--primary-dark);transform:translateY(-3px)}#backToTop.show{display:flex}::-webkit-scrollbar{width:8px}::-webkit-scrollbar-track{background:var(--bg-body)}::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px}::-webkit-scrollbar-thumb:hover{background:var(--text-muted)}@media(max-width: 768px){.hero-section{padding:100px 20px 60px}.hero-title{font-size:1.8rem}.tool-card{padding:1.2rem}.opt-grid{grid-template-columns:1fr}.content-card{padding:1.5rem}.related-grid{grid-template-columns:repeat(2, 1fr)}}