:root{--li-white:#F5F5F5;--li-blue:#4A90D9;--li-dark:#2F2F2F;--li-accent:#8B4513;--li-gold:#DAA520}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Noto Serif SC','KaiTi','STKaiti',serif;background:linear-gradient(135deg,#e8f4f8 0%,#fdf5e6 100%);color:var(--li-dark);line-height:1.8;min-height:100vh}header{background:linear-gradient(135deg,var(--li-blue) 0%,#2563eb 100%);padding:30px 20px;color:white;text-align:center;box-shadow:0 4px 20px rgba(74,144,217,0.3)}.header-title{font-family:'KaiTi','STKaiti',serif;font-size:36px;font-weight:bold;letter-spacing:12px;text-shadow:2px 2px 4px rgba(0,0,0,0.3)}.header-subtitle{font-size:16px;opacity:0.9;margin-top:10px}.direct-answer{background:white;padding:25px;margin:20px auto;max-width:1000px;border-radius:15px;box-shadow:0 4px 15px rgba(0,0,0,0.08);border-left:4px solid var(--li-blue)}.direct-answer h3{color:var(--li-blue);margin-bottom:10px;font-size:18px}.direct-answer 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h4{color:var(--li-blue);margin-bottom:10px;font-size:15px}.poem-appreciation p{text-indent:2em;margin-bottom:10px}.section-divider{text-align:center;margin:40px 0}.section-divider span{display:inline-block;padding:10px 30px;background:var(--li-blue);color:white;border-radius:20px;font-size:16px;letter-spacing:4px}.cross-links{display:flex;justify-content:center;gap:15px;padding:20px;background:white;box-shadow:0 2px 10px rgba(0,0,0,0.05);flex-wrap:wrap;margin-bottom:20px}.cross-link-btn{display:inline-flex;align-items:center;gap:6px;padding:10px 20px;background:linear-gradient(135deg,var(--li-blue),#2563eb);color:white;text-decoration:none;border-radius:20px;font-size:14px;font-weight:500;transition:all 0.3s}.cross-link-btn:hover{transform:translateY(-2px);box-shadow:0 4px 15px rgba(74,144,217,0.3)}.poem-categories{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px;justify-content:center}.category-btn{padding:8px 20px;background:white;border:1px solid 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(max-width:768px){.header-title{font-size:24px;letter-spacing:6px}.poem-header{flex-direction:column;gap:8px;align-items:flex-start}.poem-content{font-size:16px;line-height:2.0}}.mood-filter{display:flex;gap:10px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}.mood-btn{padding:10px 20px;border:2px solid var(--li-blue);border-radius:25px;background:white;color:var(--li-blue);cursor:pointer;font-size:14px;transition:all 0.3s cubic-bezier(0.34,1.56,0.64,1);display:inline-flex;align-items:center;gap:5px}.mood-btn:hover{transform:translateY(-3px);box-shadow:0 6px 15px rgba(74,144,217,0.3)}.mood-btn.active{background:linear-gradient(135deg,var(--li-blue),#2563eb);color:white;border-color:transparent}.poem-actions{display:flex;gap:10px;margin-top:15px;padding-top:15px;border-top:1px dashed #eee}.action-btn{padding:8px 16px;border:none;border-radius:20px;cursor:pointer;font-size:13px;transition:all 0.3s cubic-bezier(0.34,1.56,0.64,1);display:inline-flex;align-items:center;gap:5px}.read-btn{background:linear-gradient(135deg,var(--li-blue),#2563eb);color:white}.read-btn:hover{transform:translateY(-2px) scale(1.05);box-shadow:0 6px 20px rgba(74,144,217,0.4)}.read-btn.reading{background:linear-gradient(135deg,#27AE60,#2ECC71);animation:readingPulse 1.5s ease-in-out infinite}@keyframes readingPulse{0%,100%{box-shadow:0 0 0 0 rgba(39,174,96,0.4)}50%{box-shadow:0 0 0 8px rgba(39,174,96,0)}}.detail-btn{background:rgba(74,144,217,0.1);color:var(--li-blue);border:1px solid rgba(74,144,217,0.2)}.detail-btn:hover{transform:translateY(-2px);background:rgba(74,144,217,0.15)}.theme-overlay{position:fixed;top:0;left:0;width:100%;height:100%;pointer-events:none;z-index:-1;transition:opacity 0.8s ease;opacity:0}.theme-overlay.active{opacity:0.15}.theme-moon{position:absolute;top:20%;right:15%;width:100px;height:100px;background:radial-gradient(circle,#fffacd 0%,#daa520 100%);border-radius:50%;box-shadow:0 0 60px rgba(255,250,205,0.6);animation:moonGlow 4s ease-in-out infinite}.theme-mountain{position:absolute;bottom:0;left:0;width:100%;height:30vh;background:linear-gradient(to top,rgba(74,144,217,0.3),transparent);clip-path:polygon(0 100%,20% 60%,40% 80%,60% 40%,80% 70%,100% 50%,100% 100%)}@keyframes moonGlow{0%,100%{box-shadow:0 0 60px rgba(255,250,205,0.6)}50%{box-shadow:0 0 100px rgba(255,250,205,0.9)}}