:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg-color: #f8fafc;--card-bg: #ffffff;--text-main: #0f172a;--text-muted: #64748b;--border-color: #e2e8f0;--dropzone-bg: #f1f5f9;--dropzone-border: #cbd5e1;--dropzone-hover: #eff6ff;--dropzone-hover-border: #93c5fd;--success: #10b981;--error: #ef4444}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;line-height:1.6;color:var(--text-main);background-color:var(--bg-color);margin:0;padding:0;-webkit-font-smoothing:antialiased}.tool-site-header{background:#ffffff;border-bottom:1px solid var(--border-color);padding:0 24px;height:52px;display:flex;align-items:center;position:sticky;top:0;z-index:100}.tool-header-inner{max-width:1200px;width:100%;margin:0 auto;display:flex;justify-content:space-between;align-items:center}.tool-brand{display:flex;align-items:center;text-decoration:none;gap:8px;flex-shrink:0}.tool-brand img{width:26px;height:26px;display:block}.tool-brand-name{font-size:1.15rem;font-weight:800;color:var(--text-main);letter-spacing:-.02em;white-space:nowrap}.tool-brand-tag{font-size:.76rem;font-weight:600;color:var(--primary);background:#eff6ff;padding:2px 8px;border-radius:6px;border:1px solid #bfdbfe;margin-left:6px;white-space:nowrap}.tool-nav{display:flex;align-items:center;gap:18px}.tool-nav-link{font-size:.88rem;font-weight:500;color:var(--text-muted);text-decoration:none;transition:color .15s;white-space:nowrap}.tool-nav-link:hover{color:var(--primary)}.tool-nav-cta{display:inline-flex;align-items:center;gap:6px;font-size:.84rem;font-weight:600;color:#fff;background:var(--primary);padding:6px 14px;border-radius:8px;text-decoration:none;transition:background .15s;white-space:nowrap}.tool-nav-cta:hover{background:var(--primary-hover)}.tool-nav-cta svg{display:inline-block;vertical-align:middle;transition:transform .2s cubic-bezier(.16,1,.3,1);flex-shrink:0}.tool-nav-cta:hover svg{transform:translate(3px)}.hero{text-align:center;padding:44px 20px 30px}h1{font-size:2.35rem;font-weight:800;letter-spacing:-.025em;color:var(--text-main);margin:0 0 12px}.subtitle{font-size:1.08rem;color:var(--text-muted);max-width:620px;margin:0 auto;line-height:1.5}.related-tools{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-top:20px;margin-bottom:-14px}.related-tools a{font-size:.85rem;font-weight:500;color:var(--text-muted);background:var(--dropzone-bg);padding:6px 14px;border-radius:20px;text-decoration:none;border:1px solid var(--border-color);transition:all .2s ease}.related-tools a:hover{color:var(--primary);border-color:var(--dropzone-hover-border);background:var(--dropzone-hover)}.related-tools a.current{background:var(--primary);color:#fff;border-color:var(--primary);pointer-events:none}.guides-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:20px;margin-top:24px;margin-bottom:20px}.guide-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:22px 20px;text-decoration:none;color:inherit;display:flex;flex-direction:column;gap:12px;box-shadow:0 1px 3px #0000000a;transition:all .2s cubic-bezier(.16,1,.3,1)}.guide-card:hover{border-color:#93c5fd;transform:translateY(-3px);box-shadow:0 10px 20px -5px #2563eb14}.guide-card-icon{width:42px;height:42px;border-radius:10px;background:#eff6ff;border:1px solid #dbeafe;display:flex;align-items:center;justify-content:center;color:var(--primary);transition:all .2s ease}.guide-card:hover .guide-card-icon{background:var(--primary);color:#fff}.guide-card-content h3{font-size:1.05rem;font-weight:700;color:var(--text-main);margin:0 0 6px;line-height:1.35;transition:color .15s}.guide-card:hover .guide-card-content h3{color:var(--primary)}.guide-card-content p{font-size:.88rem;color:var(--text-muted);margin:0;line-height:1.5}.guide-card-arrow{margin-top:auto;display:inline-flex;align-items:center;gap:6px;font-size:.84rem;font-weight:600;color:var(--primary)}.container{max-width:1200px;margin:0 auto;padding:0 20px 80px}.tool-widget{max-width:900px;background:var(--card-bg);border-radius:24px;box-shadow:0 20px 25px -5px #0000000d,0 8px 10px -6px #00000003;padding:36px 40px;margin:0 auto 36px;border:1px solid var(--border-color)}.drop-zone{border:2px dashed var(--dropzone-border);border-radius:16px;background:var(--dropzone-bg);padding:48px 20px;text-align:center;cursor:pointer;transition:all .2s ease;display:flex;flex-direction:column;align-items:center;justify-content:center}.drop-zone:hover,.drop-zone.dragover{background:var(--dropzone-hover);border-color:var(--dropzone-hover-border)}.drop-zone-icon{font-size:3.2rem;line-height:1;margin-bottom:16px;filter:drop-shadow(0 4px 6px rgba(0,0,0,.1))}.drop-zone h3{font-size:1.35rem;font-weight:600;margin:0 0 8px;color:var(--text-main)}.drop-zone p{font-size:.95rem;color:var(--text-muted);margin:0 0 20px}.btn-upload{background-color:var(--primary);color:#fff;padding:12px 28px;border-radius:8px;font-weight:600;font-size:1rem;border:none;cursor:pointer;box-shadow:0 4px 6px -1px #2563eb33;transition:background-color .2s,transform .1s;display:inline-block}.btn-upload:hover{background-color:var(--primary-hover);transform:translateY(-1px)}.file-list{margin-top:24px;display:flex;flex-direction:column;gap:12px}.file-item{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;box-shadow:0 1px 3px #0000000d}.thumb-preview-wrap{position:relative;cursor:zoom-in;pointer-events:auto;display:inline-flex;align-items:center;justify-content:center;border-radius:8px;padding:2px;transition:transform .18s cubic-bezier(.16,1,.3,1),box-shadow .18s cubic-bezier(.16,1,.3,1)}.thumb-preview-wrap:hover{transform:scale(1.08);box-shadow:0 4px 12px #2563eb40}.thumb-preview-wrap img{display:block;width:48px;height:48px;object-fit:cover;border-radius:6px;box-shadow:0 1px 3px #0000001a;border:1px solid rgba(0,0,0,.08);pointer-events:none}.thumb-preview-overlay{position:absolute;top:2px;right:2px;bottom:2px;left:2px;border-radius:6px;background:rgba(15,23,42,.45);display:flex;align-items:center;justify-content:center;opacity:0;transition:opacity .15s ease;color:#fff;pointer-events:none}.thumb-preview-wrap:hover .thumb-preview-overlay{opacity:1}.file-name{font-weight:500;color:var(--text-main);flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;margin-right:16px}.file-status{font-size:.9rem;font-weight:500;margin-right:16px;min-width:80px;text-align:right}.file-action{display:flex;gap:8px}.actions-bar{display:flex;justify-content:space-between;align-items:center;margin-top:24px;padding-top:24px;border-top:1px solid var(--border-color)}.btn{padding:10px 20px;border-radius:8px;font-weight:500;font-size:.95rem;border:1px solid var(--border-color);background:var(--card-bg);color:var(--text-main);cursor:pointer;transition:all .2s}.btn:hover{background:var(--dropzone-bg)}.btn-primary{background:var(--primary);color:#fff;border:none}.btn-primary:hover{background:var(--primary-hover)}.btn:disabled{opacity:.5;cursor:not-allowed}.options-bar{display:flex;justify-content:center;align-items:center;margin-bottom:24px;gap:12px}.options-bar label{font-weight:600;color:var(--text-main)}.options-bar select{padding:8px 16px;border-radius:8px;border:1px solid var(--border-color);background:var(--card-bg);color:var(--text-main);font-size:1rem;font-weight:500;cursor:pointer;outline:none;box-shadow:0 1px 2px #0000000d}.cta-middle{text-align:center;margin:0 auto 50px;max-width:900px}.cta-button{display:inline-flex;align-items:center;justify-content:center;gap:10px;background:var(--card-bg);color:var(--primary);border:2px solid var(--primary);padding:12px 28px;border-radius:12px;text-decoration:none;font-weight:600;font-size:1.05rem;box-shadow:0 4px 6px -1px #2563eb1a;transition:all .2s cubic-bezier(.16,1,.3,1)}.cta-button:hover{background:var(--primary);color:#fff;transform:translateY(-2px);box-shadow:0 10px 15px -3px #2563eb33}.cta-button svg{display:inline-block;vertical-align:middle;transition:transform .2s cubic-bezier(.16,1,.3,1);flex-shrink:0}.cta-button:hover svg{transform:translate(4px)}.content-section{margin:60px auto 0;max-width:900px}h2{font-size:1.75rem;font-weight:700;color:var(--text-main);margin-bottom:24px;letter-spacing:-.01em}.features-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:24px;margin-bottom:40px}.feature-card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:16px;padding:24px;box-shadow:0 1px 3px #00000005}.feature-icon{font-size:1.75rem;margin-bottom:16px;display:inline-flex;align-items:center;justify-content:center;width:48px;height:48px;background:var(--dropzone-bg);border-radius:12px;color:var(--primary)}.feature-card h3{font-size:1.25rem;font-weight:600;margin:0 0 8px;color:var(--text-main)}.feature-card p{color:var(--text-muted);font-size:.95rem;line-height:1.6;margin:0}.steps-list{display:flex;flex-direction:column;gap:20px;margin-bottom:40px}.step-item{display:flex;align-items:flex-start;gap:16px;background:var(--card-bg);padding:20px;border-radius:12px;border:1px solid var(--border-color)}.step-number{background:var(--primary);color:#fff;width:32px;height:32px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}.step-content h3{margin:0 0 6px;font-size:1.1rem;font-weight:600;color:var(--text-main)}.step-content p{margin:0;color:var(--text-muted);font-size:.95rem}.faq-list{display:flex;flex-direction:column;gap:16px}.faq-box{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;padding:24px}.faq-q{font-size:1.1rem;font-weight:600;color:var(--text-main);margin-bottom:10px}.faq-a{color:var(--text-muted);line-height:1.6}input[type=file]{display:none}@media (max-width: 768px){.tool-site-header{height:50px;padding:0 16px}.tool-header-inner{width:100%;display:flex;justify-content:space-between;align-items:center}.tool-brand-tag,.tool-nav-link{display:none!important}.tool-brand{gap:8px}.tool-brand img{width:24px;height:24px}.tool-brand-name{font-size:1.1rem}.tool-nav-cta{padding:6px 12px;font-size:.8rem}.hero{padding:28px 16px 20px}h1{font-size:1.85rem}.subtitle{font-size:.95rem}.related-tools{gap:6px;margin-top:14px}.related-tools a{font-size:.78rem;padding:4px 10px}.container{padding:0 16px 60px}.tool-widget{padding:24px 18px;border-radius:18px;margin-bottom:28px}.drop-zone{padding:36px 16px}.drop-zone-icon{font-size:2.5rem;margin-bottom:12px}.drop-zone h3{font-size:1.15rem}.drop-zone p{font-size:.85rem;margin-bottom:16px}.btn-upload{padding:10px 22px;font-size:.95rem}.file-item{flex-direction:column;gap:12px;text-align:center}.file-name{margin-right:0}.file-status,.file-action{width:100%;text-align:center}.actions-bar{flex-direction:column;gap:16px}.btn{width:100%}.cta-middle{margin:0 auto 36px;padding:0 8px}.cta-button{padding:10px 20px;font-size:.95rem}}