.tool-header{text-align:center;margin-bottom:40px}.header-badge{display:flex;justify-content:center;gap:12px;margin-bottom:24px;flex-wrap:wrap}.badge{background:linear-gradient(135deg, #667eea, #764ba2);color:white;padding:6px 18px;border-radius:40px;font-size:0.75rem;font-weight:500;box-shadow:0 2px 8px rgba(0,0,0,0.1)}.tool-header h1{font-size:2.2rem;font-weight:800;background:linear-gradient(135deg, #1e293b, #667eea);-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:12px}.tool-header p{color:var(--gray-500);font-size:1rem}.core-stats{display:flex;justify-content:center;gap:24px;margin-bottom:32px;flex-wrap:wrap}.core-stat{background:white;border-radius:60px;padding:16px 28px;display:flex;align-items:center;gap:16px;box-shadow:0 4px 15px rgba(0,0,0,0.05);border:1px solid var(--gray-200)}.core-stat-icon{width:48px;height:48px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:50%;display:flex;align-items:center;justify-content:center;color:#667eea;font-size:1.3rem}.core-stat-info{text-align:left}.core-stat-value{display:block;font-size:1.5rem;font-weight:700;color:var(--gray-800)}.core-stat-label{font-size:0.7rem;color:var(--gray-500)}.input-section{background:var(--gray-50);border-radius:24px;padding:20px;margin-bottom:24px}.section-header{display:flex;align-items:center;gap:12px;margin-bottom:16px;padding-bottom:12px;border-bottom:1px solid var(--gray-200);font-weight:600;color:var(--gray-700)}.input-tabs{display:flex;gap:8px;margin-left:auto}.input-tab{background:transparent;border:none;padding:6px 16px;border-radius:30px;cursor:pointer;font-size:0.75rem;transition:all 0.2s;color:var(--gray-500)}.input-tab.active{background:white;color:#667eea;box-shadow:0 2px 6px rgba(0,0,0,0.05)}.crc-textarea{width:100%;min-height:150px;padding:16px;font-family:'Fira Code',monospace;font-size:0.85rem;border:1px solid var(--gray-200);border-radius:16px;resize:vertical;background:white}.crc-textarea:focus{outline:none;border-color:#667eea}.mode-hint{margin-top:12px;font-size:0.7rem;color:var(--gray-400)}.file-upload-area{border:2px dashed var(--gray-300);border-radius:20px;padding:40px;text-align:center;cursor:pointer;transition:all 0.3s}.file-upload-area:hover{border-color:#667eea;background:var(--gray-100)}.file-upload-area i{font-size:48px;color:var(--gray-400);margin-bottom:12px}.file-info{margin-top:16px;padding:12px;background:white;border-radius:16px}.file-info-row{display:flex;gap:12px;padding:6px 0}.algorithm-section{margin-bottom:24px}.algorithm-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:12px;margin-top:16px}.algo-btn{background:white;border:2px solid var(--gray-200);border-radius:16px;padding:14px;cursor:pointer;transition:all 0.3s;text-align:left}.algo-btn:hover{border-color:#667eea;transform:translateY(-2px)}.algo-btn.active{border-color:#667eea;background:linear-gradient(135deg, #f0f4ff, #fff)}.algo-name{display:block;font-weight:700;font-size:1rem;color:var(--gray-800);margin-bottom:4px}.algo-desc{display:block;font-size:0.7rem;color:var(--gray-500)}.advanced-section{background:var(--gray-50);border-radius:20px;padding:16px;margin-bottom:24px}.toggle-btn{background:transparent;border:none;margin-left:auto;cursor:pointer;color:var(--gray-500);transition:transform 0.3s}.advanced-panel{margin-top:16px;padding-top:16px;border-top:1px solid var(--gray-200);display:grid;grid-template-columns:repeat(2, 1fr);gap:16px}.option-row{display:flex;align-items:center;gap:12px;flex-wrap:wrap}.option-row label{width:100px;font-size:0.8rem;color:var(--gray-600)}.option-input{flex:1;padding:8px 12px;border:1px solid var(--gray-300);border-radius:40px;font-size:0.8rem}.option-select{flex:1;padding:8px 12px;border:1px solid var(--gray-300);border-radius:40px;font-size:0.8rem;background:white}.calc-btn{width:100%;padding:16px;font-size:1rem;border-radius:60px;margin-bottom:24px}.result-section{background:linear-gradient(135deg, #1a1a2e, #16213e);border-radius:24px;overflow:hidden;margin-bottom:24px}.result-header{display:flex;justify-content:space-between;align-items:center;padding:16px 24px;background:rgba(255,255,255,0.05);border-bottom:1px solid rgba(255,255,255,0.1);color:white}.result-actions{display:flex;gap:8px}.action-btn-sm{background:rgba(255,255,255,0.1);border:none;padding:6px 14px;border-radius:30px;color:white;cursor:pointer;font-size:0.7rem;transition:all 0.2s}.action-btn-sm:hover{background:rgba(255,255,255,0.2)}.result-content{padding:24px}.result-item{display:flex;align-items:center;gap:16px;padding:10px 0;border-bottom:1px solid rgba(255,255,255,0.05)}.result-label{width:100px;font-size:0.85rem;color:rgba(255,255,255,0.6)}.result-value{font-family:'Fira Code',monospace;font-size:1rem;color:white;word-break:break-all}.crc-value{font-size:1.2rem;font-weight:700;color:#4ade80}.crc-knowledge{background:linear-gradient(135deg, #f0f4ff, #e8edf8);border-radius:24px;padding:20px;margin-bottom:24px}.knowledge-header{display:flex;align-items:center;gap:10px;margin-bottom:16px;font-weight:600;color:var(--gray-700)}.knowledge-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px}.knowledge-card{background:white;border-radius:16px;padding:16px;transition:all 0.3s}.knowledge-card:hover{transform:translateY(-4px);box-shadow:0 8px 20px rgba(0,0,0,0.08)}.knowledge-card i{font-size:1.5rem;color:#667eea;margin-bottom:12px}.knowledge-card h4{font-size:0.9rem;margin-bottom:8px}.knowledge-card p{font-size:0.7rem;color:var(--gray-500);line-height:1.5}.info-section{margin-top:20px}.divider{display:flex;align-items:center;gap:12px;margin-bottom:16px}.divider span{font-size:0.85rem;font-weight:500;color:var(--gray-600)}.divider::after{content:'';flex:1;height:1px;background:var(--gray-200)}.info-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:16px;padding:16px;background:var(--gray-50);border-radius:20px}.info-item{display:flex;align-items:center;gap:8px;font-size:0.8rem;color:var(--gray-600)}.info-item i{color:#10b981}@media (max-width:900px){.algorithm-grid{grid-template-columns:repeat(2, 1fr)}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}.info-grid{grid-template-columns:repeat(2, 1fr)}.advanced-panel{grid-template-columns:1fr}}@media (max-width:480px){.algorithm-grid{grid-template-columns:1fr}.knowledge-grid{grid-template-columns:1fr}.info-grid{grid-template-columns:1fr}.core-stats{gap:12px}.core-stat{padding:12px 20px}.input-tabs{flex-wrap:wrap}}