.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;transition:all 0.3s;border:1px solid var(--gray-200)}.feature-card:hover{transform:translateY(-3px);box-shadow:0 10px 25px -8px rgba(0,0,0,0.1);border-color:var(--primary-color)}.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 h4{font-size:0.9rem;margin-bottom:4px;color:var(--gray-800)}.feature-info p{font-size:0.7rem;color:var(--gray-500)}.jj-tabs{display:flex;gap:16px;margin-bottom:28px;justify-content:center}.jj-tab{background:transparent;border:none;padding:14px 32px;cursor:pointer;transition:all 0.3s;border-radius:20px;text-align:center;min-width:160px}.jj-tab i{font-size:1.3rem;color:var(--gray-400);margin-bottom:8px;display:block}.jj-tab span{display:block;font-weight:600;color:var(--gray-600);margin-bottom:4px}.jj-tab small{font-size:0.65rem;color:var(--gray-400)}.jj-tab.active{background:linear-gradient(135deg, #1a1a2e, #16213e);box-shadow:0 8px 25px rgba(0,0,0,0.2)}.jj-tab.active i,.jj-tab.active span,.jj-tab.active small{color:white}.editor-card{background:white;border-radius:24px;overflow:hidden;border:1px solid var(--gray-200);margin-bottom:24px}.editor-header{display:flex;justify-content:space-between;align-items:center;padding:14px 20px;background:linear-gradient(135deg, #f8fafc, #fff);border-bottom:1px solid var(--gray-200)}.editor-title{display:flex;align-items:center;gap:12px;font-weight:600;color:var(--gray-700)}.editor-title i{color:#f7df1e;font-size:1.2rem}.char-count{font-size:0.7rem;font-weight:normal;color:var(--gray-400);background:var(--gray-100);padding:2px 10px;border-radius:20px}.editor-actions{display:flex;gap:8px}.icon-btn{background:transparent;border:none;padding:6px 12px;border-radius:30px;cursor:pointer;transition:all 0.2s;color:var(--gray-500);font-size:0.85rem}.icon-btn:hover{background:var(--gray-100);color:var(--primary-color)}.file-label{cursor:pointer;padding:6px 12px;border-radius:30px;transition:all 0.2s;color:var(--gray-500)}.file-label:hover{background:var(--gray-100);color:var(--primary-color)}.code-textarea{width:100%;min-height:280px;padding:20px;border:none;font-family:'Fira Code','Monaco',monospace;font-size:0.85rem;line-height:1.6;resize:vertical;background:#1a1a2e;color:#e0e0e0}.code-textarea:focus{outline:none}.encrypt-options{background:var(--gray-50);border-radius:20px;padding:20px;margin:20px 0;display:flex;flex-wrap:wrap;gap:32px}.option-group{flex:1}.option-group label{display:block;font-size:0.75rem;font-weight:600;color:var(--gray-500);margin-bottom:10px}.strength-buttons{display:flex;gap:12px}.strength-btn{background:white;border:1px solid var(--gray-200);padding:8px 20px;border-radius:40px;font-size:0.8rem;cursor:pointer;transition:all 0.2s}.strength-btn.active{background:#1a1a2e;border-color:#1a1a2e;color:white}.checkbox-group{display:flex;gap:20px}.checkbox-label{display:flex;align-items:center;gap:8px;cursor:pointer;font-size:0.85rem}.encode-btn,.decode-btn{width:100%;padding:14px;font-size:1rem;border-radius:50px;background:linear-gradient(135deg, #1a1a2e, #16213e);margin-bottom:24px}.encode-btn:hover,.decode-btn:hover{background:linear-gradient(135deg, #2d2d44, #1a1a2e);transform:translateY(-2px)}.result-card{background:var(--gray-50);border-radius:24px;overflow:hidden;animation:fadeIn 0.3s ease}.result-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)}.result-title{display:flex;align-items:center;gap:10px;font-weight:600}.result-content{padding:20px;font-family:'Fira Code',monospace;font-size:0.75rem;line-height:1.5;max-height:300px;overflow-y:auto;background:#1a1a2e;color:#e0e0e0;word-break:break-all}.result-footer{padding:12px 20px;background:var(--gray-100);border-top:1px solid var(--gray-200);font-size:0.7rem;color:var(--gray-500)}.info-footer{margin-top:32px;background:var(--gray-50);border-radius:24px;padding:24px}.info-footer-header{display:flex;align-items:center;gap:10px;margin-bottom:16px;font-weight:600;color:var(--gray-700)}.info-content p{font-size:0.85rem;color:var(--gray-600);line-height:1.6;margin-bottom:16px}.warning-tip{background:#fef3c7;border-radius:12px;padding:12px 16px;display:flex;align-items:center;gap:10px;font-size:0.8rem;color:#92400e}.warning-tip i{font-size:1rem}.ad-section{margin:32px 0}.ad-banner{background:linear-gradient(135deg, #f8fafc, #fff);border:1px solid var(--gray-200);border-radius:20px;padding:20px;text-align:center;position:relative}.ad-label{position:absolute;top:8px;right:12px;font-size:0.6rem;color:var(--gray-400)}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.feature-cards{grid-template-columns:repeat(2, 1fr)}.encrypt-options{flex-direction:column;gap:20px}.jj-tab{min-width:auto;padding:10px 20px}}@media (max-width:480px){.feature-cards{grid-template-columns:1fr}.strength-buttons{flex-wrap:wrap}.checkbox-group{flex-wrap:wrap}}