.feature-cards{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-bottom:32px}.feature-card{background:white;border-radius:20px;padding:20px;display:flex;align-items:center;gap:16px;border:1px solid var(--gray-200);transition:all 0.3s}.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 25px rgba(0,0,0,0.08)}.feature-icon{width:48px;height:48px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:1.3rem;color:var(--primary-color)}.feature-info h3{font-size:0.9rem;font-weight:600;margin-bottom:4px}.feature-info p{font-size:0.7rem;color:var(--gray-500)}.upload-area{background:linear-gradient(135deg, #f8fafc, #fff);border:2px dashed var(--gray-300);border-radius:32px;padding:48px 24px;text-align:center;cursor:pointer;transition:all 0.3s;margin-bottom:24px}.upload-area:hover{border-color:var(--primary-color);background:linear-gradient(135deg, #f0f4ff, #fff)}.upload-area i{font-size:48px;color:var(--primary-color);margin-bottom:16px}.upload-area p{margin-bottom:8px;color:var(--gray-600)}.upload-hint{font-size:0.7rem;color:var(--gray-400);margin-bottom:16px}.convert-options{background:var(--gray-50);border-radius:20px;padding:20px;margin-bottom:24px;display:flex;flex-wrap:wrap;gap:32px}.option-group{flex:1;min-width:180px}.option-group label{display:block;font-size:0.75rem;font-weight:600;color:var(--gray-500);margin-bottom:12px}.quality-control{display:flex;align-items:center;gap:16px}.quality-control input{flex:1}.quality-control span{min-width:45px;font-weight:600;color:var(--primary-color)}.size-select{width:100%;padding:8px 12px;border:1px solid var(--gray-300);border-radius:12px;background:white}.custom-size{display:flex;gap:12px;margin-top:12px;align-items:center}.custom-size input{flex:1;padding:8px 12px;border:1px solid var(--gray-300);border-radius:12px}.file-list{background:white;border-radius:20px;border:1px solid var(--gray-200);overflow:hidden;margin-bottom:24px}.file-list-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200);font-weight:500}.clear-btn{background:transparent;border:none;color:var(--gray-500);cursor:pointer;padding:4px 12px;border-radius:30px;font-size:0.75rem;transition:all 0.2s}.clear-btn:hover{background:#fee2e2;color:#ef4444}.file-items{max-height:300px;overflow-y:auto}.file-item{display:flex;align-items:center;justify-content:space-between;padding:12px 20px;border-bottom:1px solid var(--gray-200);transition:background 0.2s}.file-item:hover{background:var(--gray-50)}.file-info{display:flex;align-items:center;gap:12px;flex:1}.file-info i{font-size:1.2rem;color:var(--primary-color)}.file-name{font-size:0.85rem;font-weight:500;max-width:200px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.file-size{font-size:0.7rem;color:var(--gray-400)}.file-status{font-size:0.7rem;padding:4px 10px;border-radius:30px}.file-status.pending{background:#fef3c7;color:#92400e}.file-status.converting{background:#dbeafe;color:#1e40af}.file-status.success{background:#d1fae5;color:#065f46}.file-status.error{background:#fee2e2;color:#991b1b}.file-actions{display:flex;gap:8px}.file-actions button{background:transparent;border:none;padding:6px;cursor:pointer;border-radius:8px;transition:all 0.2s;color:var(--gray-500)}.file-actions button:hover{background:var(--gray-200);color:var(--primary-color)}.file-list-footer{padding:16px 20px;border-top:1px solid var(--gray-200);text-align:center}.convert-all-btn{padding:12px 32px;font-size:0.9rem}.result-area{background:white;border-radius:20px;border:1px solid var(--gray-200);overflow:hidden;margin-bottom:24px}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 20px;background:linear-gradient(135deg, #d1fae5, #fff);border-bottom:1px solid var(--gray-200);font-weight:500;color:#065f46}.result-items{max-height:400px;overflow-y:auto}.result-item{display:flex;align-items:center;justify-content:space-between;padding:16px 20px;border-bottom:1px solid var(--gray-200)}.result-preview{width:60px;height:60px;border-radius:12px;overflow:hidden;background:var(--gray-100);display:flex;align-items:center;justify-content:center}.result-preview img{width:100%;height:100%;object-fit:cover}.result-info{flex:1;margin-left:16px}.result-name{font-size:0.85rem;font-weight:500;margin-bottom:4px}.result-size{font-size:0.65rem;color:var(--gray-400)}.result-actions{display:flex;gap:8px}.result-actions button{background:var(--gray-100);border:none;padding:8px 16px;border-radius:30px;font-size:0.75rem;cursor:pointer;transition:all 0.2s}.result-actions button:hover{background:var(--primary-color);color:white}.result-footer{padding:16px 20px;border-top:1px solid var(--gray-200);text-align:center}.download-all-btn{padding:12px 32px;font-size:0.9rem}.info-section{margin-top:24px}.info-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;padding:16px}.info-item{display:flex;align-items:center;gap:12px;font-size:0.8rem;color:var(--gray-600)}.info-item i{width:28px;height:28px;background:var(--gray-100);border-radius:50%;display:inline-flex;align-items:center;justify-content:center;color:var(--primary-color);font-size:0.7rem}.info-note{background:#fef3c7;border-radius:16px;padding:12px 16px;font-size:0.75rem;color:#92400e;margin-top:16px}.ad-section{margin:20px 0 40px}.ad-banner{background:linear-gradient(135deg, #f5f5f5, #fff);border:1px solid var(--gray-200);border-radius:16px;padding:20px;text-align:center;position:relative}.ad-label{position:absolute;top:8px;right:12px;font-size:0.6rem;color:var(--gray-400)}.ad-content{color:var(--gray-500);font-size:0.85rem}.loading-spinner{display:inline-block;width:16px;height:16px;border:2px solid var(--gray-300);border-top-color:var(--primary-color);border-radius:50%;animation:spin 0.6s linear infinite;margin-right:8px}@keyframes spin{to{transform:rotate(360deg)}}@media (max-width:1024px){.feature-cards{grid-template-columns:repeat(2, 1fr)}}@media (max-width:768px){.feature-cards{grid-template-columns:1fr}.convert-options{flex-direction:column;gap:20px}.info-grid{grid-template-columns:repeat(2, 1fr)}.result-item{flex-direction:column;text-align:center;gap:12px}.result-info{margin-left:0}.file-item{flex-wrap:wrap;gap:12px}.file-actions{width:100%;justify-content:flex-end}}