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toastIn{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}.loading{justify-content:center;align-items:center;padding:40px;display:flex}.loading-spinner{border:3px solid var(--border);border-top-color:var(--primary);border-radius:50%;width:40px;height:40px;animation:1s linear infinite spin}@keyframes spin{to{transform:rotate(360deg)}}.empty-state{text-align:center;padding:60px 20px}.empty-state-icon{opacity:.5;margin-bottom:20px;font-size:64px}.empty-state-title{color:var(--text-primary);margin-bottom:10px;font-size:20px;font-weight:600}.empty-state-desc{color:var(--text-secondary);font-size:15px}.detail-header{gap:40px;margin-bottom:40px;display:flex}.detail-cover{flex-shrink:0;width:280px}.detail-cover img{border-radius:var(--radius);width:100%;box-shadow:var(--shadow-lg)}.detail-info{flex:1}.detail-title{margin-bottom:16px;font-size:32px;font-weight:700}.detail-meta{flex-wrap:wrap;gap:12px;margin-bottom:20px;display:flex}.detail-meta-item{color:var(--text-secondary);align-items:center;gap:6px;font-size:14px;display:flex}.detail-score{align-items:center;gap:var(--spacing-xs);margin-bottom:var(--spacing-md);display:flex}.detail-score-value{color:var(--primary);font-size:36px;font-weight:700}.detail-score-label{color:var(--text-secondary)}.detail-description{color:var(--text-secondary);margin-bottom:24px;line-height:1.8}.detail-tags{flex-wrap:wrap;gap:8px;display:flex}.detail-actions{gap:12px;margin-top:24px;display:flex}.tutorial-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);transition:all var(--transition);cursor:pointer;overflow:hidden}.tutorial-card:hover{box-shadow:var(--shadow-lg);transform:translateY(-4px)}.tutorial-card-cover{aspect-ratio:16/9;overflow:hidden}.tutorial-card-cover img{object-fit:cover;width:100%;height:100%}.tutorial-card-body{padding:20px}.tutorial-card-category{background:var(--primary);color:#fff;border-radius:20px;margin-bottom:12px;padding:4px 10px;font-size:12px;font-weight:500;display:inline-block}.tutorial-card-title{-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-bottom:10px;font-size:17px;font-weight:600;display:-webkit-box;overflow:hidden}.tutorial-card-footer{color:var(--text-secondary);justify-content:space-between;align-items:center;font-size:13px;display:flex}.user-card{background:var(--surface);border-radius:var(--radius);text-align:center;box-shadow:var(--shadow);transition:all var(--transition);padding:24px}.user-card:hover{box-shadow:var(--shadow-lg)}.user-card-avatar{background:linear-gradient(135deg, var(--primary-light), var(--secondary));border-radius:50%;width:80px;height:80px;margin:0 auto 16px;overflow:hidden}.user-card-avatar img{object-fit:cover;width:100%;height:100%}.user-card-name{margin-bottom:4px;font-size:18px;font-weight:600}.user-card-level{background:var(--primary);color:#fff;border-radius:20px;margin-bottom:12px;padding:2px 10px;font-size:12px;font-weight:500;display:inline-block}.user-card-bio{color:var(--text-secondary);-webkit-line-clamp:2;-webkit-box-orient:vertical;font-size:14px;display:-webkit-box;overflow:hidden}.user-card-stats{border-top:1px solid var(--border);justify-content:center;gap:32px;margin-top:16px;padding-top:16px;display:flex}.user-card-stat{text-align:center}.user-card-stat-value{color:var(--primary);font-size:18px;font-weight:700}.user-card-stat-label{color:var(--text-secondary);font-size:12px}.resource-card{background:var(--surface);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}.resource-card-image{aspect-ratio:16/9;overflow:hidden}.resource-card-image img{object-fit:cover;width:100%;height:100%}.resource-card-body{padding:20px}.resource-card-type{background:var(--secondary);color:#fff;border-radius:20px;margin-bottom:12px;padding:4px 10px;font-size:12px;font-weight:500;display:inline-block}.resource-card-title{margin-bottom:8px;font-size:17px;font-weight:600}.resource-card-desc{color:var(--text-secondary);-webkit-line-clamp:2;-webkit-box-orient:vertical;margin-bottom:12px;font-size:14px;display:-webkit-box;overflow:hidden}.resource-card-contact{color:var(--primary);align-items:center;gap:8px;font-size:14px;display:flex}.chapter-list{flex-direction:column;gap:12px;display:flex}.chapter-item{background:var(--surface);border-radius:var(--radius-sm);transition:all var(--transition);cursor:pointer;justify-content:space-between;align-items:center;padding:16px 20px;display:flex}.chapter-item:hover{background:var(--surface-hover);transform:translate(4px)}.chapter-number{background:var(--primary);color:#fff;border-radius:50%;justify-content:center;align-items:center;width:32px;height:32px;margin-right:16px;font-size:14px;font-weight:600;display:flex}.chapter-title{flex:1;font-weight:500}.chapter-date{color:var(--text-secondary);font-size:13px}.comment-section{margin-top:40px}.comment-input{gap:16px;margin-bottom:24px;display:flex}.comment-input-avatar{background:linear-gradient(135deg, var(--primary-light), var(--secondary));border-radius:50%;flex-shrink:0;width:48px;height:48px;overflow:hidden}.comment-input-avatar img{object-fit:cover;width:100%;height:100%}.comment-input-box{flex:1}.comment-input textarea{border:2px solid var(--border);border-radius:var(--radius);resize:none;background:var(--surface);width:100%;min-height:100px;color:var(--text-primary);margin-bottom:12px;padding:14px}.comment-input textarea:focus{border-color:var(--primary);outline:none}.comment-list{flex-direction:column;gap:20px;display:flex}.comment-item{gap:16px;display:flex}.comment-avatar{background:linear-gradient(135deg, var(--primary-light), var(--secondary));border-radius:50%;flex-shrink:0;width:40px;height:40px;overflow:hidden}.comment-avatar img{object-fit:cover;width:100%;height:100%}.comment-content{flex:1}.comment-header{align-items:center;gap:10px;margin-bottom:6px;display:flex}.comment-username{font-size:14px;font-weight:600}.comment-time{color:var(--text-secondary);font-size:12px}.comment-text{color:var(--text-primary);font-size:14px;line-height:1.6}.comment-actions{gap:16px;margin-top:8px;display:flex}.comment-action{color:var(--text-secondary);cursor:pointer;align-items:center;gap:4px;font-size:13px;display:flex}.comment-action:hover{color:var(--primary)}.breadcrumb{color:var(--text-secondary);align-items:center;gap:8px;margin-bottom:24px;font-size:14px;display:flex}.breadcrumb a:hover{color:var(--primary)}.breadcrumb-separator{color:var(--text-light)}.masonry{columns:4;column-gap:20px}.masonry-item{break-inside:avoid;margin-bottom:20px}.level-badge{background:linear-gradient(135deg, var(--primary), var(--secondary));color:#fff;border-radius:10px;justify-content:center;align-items:center;min-width:20px;height:20px;padding:0 6px;font-size:11px;font-weight:600;display:inline-flex}.upload-preview{grid-template-columns:repeat(auto-fill,minmax(100px,1fr));gap:12px;margin-top:12px;display:grid}.upload-preview-item{aspect-ratio:1;border-radius:var(--radius-sm);background:var(--surface-hover);position:relative;overflow:hidden}.upload-preview-item img{object-fit:cover;width:100%;height:100%}.upload-preview-remove{color:#fff;cursor:pointer;background:#00000080;border-radius:50%;justify-content:center;align-items:center;width:24px;height:24px;font-size:14px;display:flex;position:absolute;top:4px;right:4px}.mobile-nav-toggle{border-radius:var(--radius-sm);background:var(--surface-hover);justify-content:center;align-items:center;width:40px;height:40px;display:flex}.mobile-nav{background:var(--surface);border-top:1px solid var(--border);z-index:1000;display:none;position:fixed;bottom:0;left:0;right:0}.mobile-nav-items{justify-content:space-around;height:56px;display:flex}.mobile-nav-item{color:var(--text-secondary);cursor:pointer;transition:color var(--transition);flex-direction:column;flex:1;justify-content:center;align-items:center;gap:4px;font-size:11px;display:flex}.mobile-nav-item:hover,.mobile-nav-item.active{color:var(--primary)}.mobile-nav-item svg{width:24px;height:24px}.skeleton{background:linear-gradient(90deg, var(--surface-hover) 25%, var(--border) 50%, var(--surface-hover) 75%);border-radius:var(--radius-sm);background-size:200% 100%;animation:1.5s infinite skeleton-loading}@keyframes skeleton-loading{0%{background-position:200% 0}to{background-position:-200% 0}}.skeleton-card{height:320px}.skeleton-text{height:16px;margin-bottom:8px}.skeleton-title{width:60%;height:24px}@media (width<=1200px){.masonry{columns:3}}@media (width<=1024px){.footer-inner{grid-template-columns:1fr 1fr}}@media (width<=900px){.masonry{columns:2}.search-box{width:280px}}@media (width<=768px){.header-inner{padding:0 16px}.search-box,.nav-menu{display:none}.detail-header{text-align:center;flex-direction:column;align-items:center}.detail-cover{width:200px}.detail-meta,.detail-actions{justify-content:center}.footer-inner{text-align:center;grid-template-columns:1fr}.card-grid{grid-template-columns:repeat(2,1fr);gap:16px}.ranking-item{padding:12px}.ranking-cover{width:50px;height:66px;margin:0 12px}.mobile-nav{display:block}.main{padding-bottom:72px}}@media (width<=600px){.masonry{columns:1}}@media (width<=480px){.card-grid{grid-template-columns:1fr}.page-title{font-size:24px}.hero-title{font-size:28px}}