:root{--spring-color:#4CAF50;--summer-color:#FF9800;--autumn-color:#8B4513;--winter-color:#2196F3;--text-dark:#333;--text-gray:#666}*{margin:0;padding:0;box-sizing:border-box}body{font-family:'Noto Serif SC','KaiTi','STKaiti',serif;background:#f8f9fa;color:var(--text-dark);line-height:1.8}header{background:linear-gradient(135deg,var(--spring-color),var(--summer-color),var(--autumn-color),var(--winter-color));padding:30px 20px;color:white;text-align:center;background-size:400% 400%;animation:gradientShift 8s ease infinite}@keyframes gradientShift{0%{background-position:0% 50%}50%{background-position:100% 50%}100%{background-position:0% 50%}}.header-title{font-size:36px;font-weight:bold;letter-spacing:8px;text-shadow:2px 2px 4px rgba(0,0,0,0.3);margin-bottom:10px}.header-subtitle{font-size:16px;opacity:0.9}.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(--spring-color)}.direct-answer h3{color:var(--spring-color);margin-bottom:10px;font-size:18px}.direct-answer p{font-size:16px;color:#444;line-height:2.0}.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(--spring-color),#45a049);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(76,175,80,0.3)}.container{max-width:1000px;margin:0 auto;padding:20px}.season-tabs{display:flex;justify-content:center;gap:10px;margin-bottom:30px;flex-wrap:wrap}.season-tab{padding:12px 25px;border:none;border-radius:25px;font-size:16px;cursor:pointer;transition:all 0.3s;font-family:'KaiTi','STKaiti',serif;font-weight:500}.season-tab.spring{background:var(--spring-color);color:white}.season-tab.summer{background:var(--summer-color);color:white}.season-tab.autumn{background:var(--autumn-color);color:white}.season-tab.winter{background:var(--winter-color);color:white}.season-tab:hover{transform:translateY(-3px) scale(1.02);box-shadow:0 6px 20px rgba(0,0,0,0.2)}.season-tab.active{transform:scale(1.1);box-shadow:0 8px 25px rgba(0,0,0,0.3);animation:tabBounce 0.5s cubic-bezier(0.34,1.56,0.64,1)}@keyframes tabBounce{0%{transform:scale(1)}50%{transform:scale(1.15)}100%{transform:scale(1.1)}}.season-section{display:none;opacity:0;transform:translateY(30px)}.season-section.active{display:block;animation:seasonFadeIn 0.6s cubic-bezier(0.34,1.56,0.64,1) forwards}@keyframes seasonFadeIn{from{opacity:0;transform:translateY(30px) scale(0.95)}to{opacity:1;transform:translateY(0) scale(1)}}.season-header{display:flex;align-items:center;gap:15px;margin-bottom:30px;padding:20px;border-radius:15px}.season-header.spring{background:linear-gradient(135deg,rgba(76,175,80,0.1),rgba(76,175,80,0.05));border-left:4px solid var(--spring-color)}.season-header.summer{background:linear-gradient(135deg,rgba(255,152,0,0.1),rgba(255,152,0,0.05));border-left:4px solid var(--summer-color)}.season-header.autumn{background:linear-gradient(135deg,rgba(139,69,19,0.1),rgba(139,69,19,0.05));border-left:4px solid var(--autumn-color)}.season-header.winter{background:linear-gradient(135deg,rgba(33,150,243,0.1),rgba(33,150,243,0.05));border-left:4px solid var(--winter-color)}.season-icon{font-size:48px}.season-title{font-size:24px;font-weight:bold}.season-desc{font-size:14px;color:var(--text-gray)}.poem-list{display:grid;gap:25px}.poem-card{background:white;border-radius:15px;padding:25px;box-shadow:0 2px 12px rgba(0,0,0,0.06);transition:all 0.5s cubic-bezier(0.34,1.56,0.64,1);position:relative;overflow:hidden;cursor:pointer}.poem-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,transparent,var(--spring-color),transparent);opacity:0;transition:opacity 0.3s}.poem-card:hover{transform:translateY(-8px) rotateX(3deg);box-shadow:0 15px 35px rgba(0,0,0,0.15)}.poem-card:hover::before{opacity:1}.poem-card.spring{border-left:4px solid var(--spring-color)}.poem-card.summer{border-left:4px solid var(--summer-color)}.poem-card.autumn{border-left:4px solid var(--autumn-color)}.poem-card.winter{border-left:4px solid var(--winter-color)}.poem-card.spring::before{background:linear-gradient(90deg,transparent,var(--spring-color),transparent)}.poem-card.summer::before{background:linear-gradient(90deg,transparent,var(--summer-color),transparent)}.poem-card.autumn::before{background:linear-gradient(90deg,transparent,var(--autumn-color),transparent)}.poem-card.winter::before{background:linear-gradient(90deg,transparent,var(--winter-color),transparent)}.poem-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:15px;padding-bottom:10px;border-bottom:1px solid #eee}.poem-title{font-size:20px;font-weight:bold;font-family:'KaiTi','STKaiti',serif}.poem-card.spring .poem-title{color:var(--spring-color)}.poem-card.summer .poem-title{color:var(--summer-color)}.poem-card.autumn .poem-title{color:var(--autumn-color)}.poem-card.winter .poem-title{color:var(--winter-color)}.poem-author{font-size:14px;color:var(--text-gray)}.poem-author a{color:var(--text-dark);text-decoration:none}.poem-author a:hover{text-decoration:underline}.poem-content{font-family:'KaiTi','STKaiti',serif;font-size:18px;line-height:2.4;text-align:center;white-space:pre-wrap;margin-bottom:15px;color:#333}.poem-appreciation{font-size:14px;color:var(--text-gray);line-height:2.0;text-indent:2em}.season-feature{background:white;border-radius:15px;padding:25px;box-shadow:0 2px 12px rgba(0,0,0,0.06);margin-bottom:30px}.season-feature h3{margin-bottom:15px;font-size:18px}.season-feature.spring h3{color:var(--spring-color)}.season-feature.summer h3{color:var(--summer-color)}.season-feature.autumn h3{color:var(--autumn-color)}.season-feature.winter h3{color:var(--winter-color)}.season-feature p{font-size:14px;color:var(--text-gray);line-height:1.8;margin-bottom:10px;text-indent:2em}.season-feature ul{list-style:none;padding-left:20px}.season-feature li{font-size:14px;color:var(--text-gray);padding:5px 0;border-bottom:1px solid #eee}.season-feature li:last-child{border-bottom:none}.season-feature li::before{content:'🌸';margin-right:8px}.season-feature.summer li::before{content:'☀️'}.season-feature.autumn li::before{content:'🍂'}.season-feature.winter li::before{content:'❄️'}.credibility-footer{background:#f5f5f5;padding:30px;margin-top:40px;border-top:1px solid #ddd}.credibility-footer h3{color:var(--spring-color);margin-bottom:15px;font-size:18px}.credibility-footer p{font-size:14px;color:#666;margin-bottom:10px}@media (max-width:768px){.header-title{font-size:24px;letter-spacing:4px}.season-header{flex-direction:column;text-align:center}.poem-header{flex-direction:column;gap:8px;align-items:flex-start}.poem-content{font-size:16px;line-height:2.0}}@keyframes particleFall{0%{transform:translateY(0) rotate(0deg) scale(1);opacity:1}100%{transform:translateY(200px) rotate(360deg) scale(0.5);opacity:0}}header{position:relative;overflow:hidden}.tang-bottom-nav{position:fixed;bottom:0;left:0;right:0;z-index:1000;background:linear-gradient(135deg,#8B4513 0%,#A0522D 50%,#8B4513 100%);border-top:4px solid #FFD700;box-shadow:0 -4px 20px rgba(0,0,0,0.3);padding:8px 0}.bottom-nav-container{display:flex;justify-content:center;align-items:center;gap:6px;max-width:1400px;margin:0 auto;padding:0 10px}.nav-item{display:flex;flex-direction:column;align-items:center;justify-content:center;padding:8px 10px;color:#FFD700;text-decoration:none;border-radius:8px;transition:all 0.3s cubic-bezier(0.4,0,0.2,1);background:rgba(255,255,255,0.08);border:1px solid rgba(255,215,0,0.3);position:relative;overflow:hidden;font-family:"SimSun","STSong",serif}.nav-item::before{content:'';position:absolute;top:0;left:-100%;width:100%;height:100%;background:linear-gradient(90deg,transparent,rgba(255,255,255,0.2),transparent);transition:left 0.5s}.nav-item:hover::before{left:100%}.nav-item:hover{background:linear-gradient(135deg,#DAA520,#FFD700);color:#5D4037;border-color:#FFD700;transform:translateY(-2px);box-shadow:0 4px 15px rgba(255,215,0,0.4)}.nav-icon{font-size:18px;margin-bottom:2px}.nav-text{font-size:11px;font-weight:500;white-space:nowrap}body{padding-bottom:90px}@media (max-width:768px){.tang-bottom-nav{height:50px;padding:4px 0;border-top-width:2px;background:rgba(139,69,19,0.9);backdrop-filter:blur(3px)}.bottom-nav-container{gap:4px;padding:0 5px;justify-content:space-around}.nav-item{padding:4px 6px;min-width:0;border-radius:6px;border-width:1px;background:rgba(255,255,255,0.05)}.nav-icon{font-size:14px;margin-bottom:1px}.nav-text{font-size:9px;display:block}body{padding-bottom:55px}}@media (max-width:480px){.tang-bottom-nav{height:40px;padding:3px 0}.bottom-nav-container{gap:2px}.nav-item{padding:3px 4px}.nav-icon{font-size:12px}.nav-text{font-size:8px}body{padding-bottom:45px}}