.stats-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-bottom:30px}.stat-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}.stat-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,0.1)}.stat-icon{width:50px;height:50px;background:linear-gradient(135deg, #e0e7ff, #f0f4ff);border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:24px;color:var(--primary-color)}.stat-value{font-size:1.6rem;font-weight:700;color:var(--gray-800)}.stat-label{font-size:0.75rem;color:var(--gray-500)}.input-section{margin-bottom:24px;padding:20px;background:var(--gray-50);border-radius:20px}.section-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:16px;flex-wrap:wrap;gap:12px}.section-header h3{font-size:1rem;display:flex;align-items:center;gap:8px}.char-input-wrapper{display:flex;gap:12px;align-items:center}.char-input{flex:1;padding:14px 20px;font-size:1.2rem;font-family:'Fira Code',monospace;border:2px solid var(--gray-300);border-radius:16px;background:white;transition:all 0.2s}.char-input:focus{outline:none;border-color:var(--primary-color);box-shadow:0 0 0 3px rgba(59,130,246,0.1)}.identify-btn{padding:14px 32px}.input-hint{margin-top:12px;font-size:0.7rem;color:var(--gray-500);display:flex;align-items:center;gap:6px}.result-section{animation:fadeIn 0.3s ease}.char-cards{display:grid;grid-template-columns:repeat(auto-fill, minmax(200px, 1fr));gap:16px;margin-bottom:24px}.char-card{background:white;border-radius:20px;padding:20px;text-align:center;border:1px solid var(--gray-200);transition:all 0.3s;cursor:pointer}.char-card:hover{transform:translateY(-4px);box-shadow:0 10px 30px rgba(0,0,0,0.1);border-color:var(--primary-color)}.char-card .char-display{font-size:3rem;font-family:'Segoe UI Emoji','Apple Color Emoji',sans-serif;margin-bottom:12px}.char-card .char-name{font-weight:600;font-size:0.85rem;color:var(--gray-800);margin-bottom:4px}.char-card .char-codepoint{font-family:monospace;font-size:0.7rem;color:var(--gray-500)}.detail-info{background:var(--gray-50);border-radius:20px;padding:20px;margin-bottom:32px}.detail-header{display:flex;align-items:center;gap:16px;margin-bottom:20px;padding-bottom:12px;border-bottom:1px solid var(--gray-200)}.detail-icon{font-size:3rem}.detail-title{flex:1}.detail-title h3{margin-bottom:4px}.detail-title p{font-size:0.8rem;color:var(--gray-500)}.detail-grid{display:grid;grid-template-columns:repeat(2, 1fr);gap:16px}.detail-item{display:flex;flex-direction:column;gap:4px}.detail-item .label{font-size:0.7rem;color:var(--gray-500)}.detail-item .value{font-family:monospace;font-size:0.9rem;font-weight:500;color:var(--gray-800);word-break:break-all}.unicode-block-nav{margin-bottom:32px}.unicode-block-nav h4{margin-bottom:16px;font-size:0.9rem}.block-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(160px, 1fr));gap:12px}.block-item{background:var(--gray-50);border-radius:12px;padding:10px 14px;cursor:pointer;transition:all 0.2s;font-size:0.8rem}.block-item:hover{background:var(--primary-color);color:white}.category-section{margin-bottom:32px}.category-section h3{margin-bottom:16px;font-size:1rem}.category-grid{display:grid;grid-template-columns:repeat(auto-fill, minmax(120px, 1fr));gap:12px}.category-item{background:white;border-radius:12px;padding:12px;text-align:center;border:1px solid var(--gray-200);cursor:pointer;transition:all 0.2s}.category-item:hover{border-color:var(--primary-color);background:var(--gray-50)}.category-item .category-count{font-size:1.2rem;font-weight:700;color:var(--primary-color)}.category-item .category-name{font-size:0.7rem;color:var(--gray-600)}.reference-section{margin-bottom:32px}.reference-tabs{display:flex;gap:8px;margin:16px 0;flex-wrap:wrap}.ref-tab{background:var(--gray-100);border:none;padding:8px 20px;border-radius:40px;cursor:pointer;transition:all 0.2s}.ref-tab.active{background:var(--primary-color);color:white}.reference-table{background:white;border-radius:16px;border:1px solid var(--gray-200);overflow-x:auto}.ref-table{width:100%;border-collapse:collapse;font-size:0.8rem}.ref-table th,.ref-table td{padding:10px 12px;text-align:left;border-bottom:1px solid var(--gray-200)}.ref-table th{background:var(--gray-50);font-weight:600}.ref-table td code{font-family:monospace;background:var(--gray-100);padding:2px 6px;border-radius:4px}.knowledge-grid{display:grid;grid-template-columns:repeat(4, 1fr);gap:20px;margin-top:20px}@keyframes fadeIn{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media (max-width:900px){.stats-grid{grid-template-columns:repeat(2, 1fr)}.detail-grid{grid-template-columns:1fr}.knowledge-grid{grid-template-columns:repeat(2, 1fr)}.char-cards{grid-template-columns:repeat(auto-fill, minmax(150px, 1fr))}}@media (max-width:600px){.stats-grid{grid-template-columns:1fr}.char-input-wrapper{flex-direction:column}.identify-btn{width:100%}.knowledge-grid{grid-template-columns:1fr}}