/* 全局样式 */body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans",sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol","Noto Color Emoji";line-height:1.6;color:#333;background:#f5f5f5;margin:0;padding:0;}*{margin:0;padding:0;box-sizing:border-box;}a{color:#0066cc;text-decoration:none;transition:color 0.2s ease;}a:hover{color:#004499;text-decoration:underline;}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;margin-bottom:0.75rem;}h1{font-size:2rem;}h2{font-size:1.5rem;margin-top:1.5rem;}h3{font-size:1.25rem;}p{margin-bottom:1rem;}ul{list-style:none;padding:0;}/* 导航栏 */nav{background:#fff;border-bottom:1px solid #e0e0e0;position:sticky;top:0;z-index:100;box-shadow:0 2px 4px rgba(0,0,0,0.05);}nav ul{display:flex;flex-wrap:nowrap;justify-content:space-between;align-items:center;max-width:1200px;margin:0 auto;padding:0;}nav li{flex:1 1 0;min-width:0;text-align:center;border-right:1px solid #f0f0f0;}nav li:last-child{border-right:none;}nav a{display:block;padding:1rem 0.5rem;color:#333;font-weight:500;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;transition:background 0.2s ease,color 0.2s ease;}nav a:hover{background:#f8f8f8;color:#0066cc;text-decoration:none;}/* 移动端导航强制单行 */@media (max-width:768px){nav ul{display:flex;flex-wrap:nowrap;overflow-x:hidden;}nav li{flex:1 1 0;min-width:0;}nav a{padding:0.75rem 0.25rem;font-size:0.85rem;}}/* 面包屑 */.breadcrumb{font-size:0.875rem;color:#666;padding:0.75rem 0;margin-bottom:1.25rem;border-bottom:1px solid #e8e8e8;}.breadcrumb a{color:#666;transition:color 0.2s ease;}.breadcrumb a:hover{color:#0066cc;}.breadcrumb span{margin:0 0.4em;color:#999;}/* 容器 */.container{max-width:1200px;margin:0 auto;padding:2rem 1.5rem;}@media (max-width:768px){.container{padding:1.5rem 1rem;}}/* 页面头部 */.site-header{text-align:center;padding:2rem 0 1.5rem;border-bottom:2px solid #0066cc;margin-bottom:2rem;}.site-header h1{font-size:2rem;color:#222;margin-bottom:0.5rem;}.page-header{margin-bottom:2rem;}.page-header h1{color:#222;margin-bottom:0.75rem;}.page-header p{color:#666;font-size:1.05rem;}/* 通知信息 */.notice{background:#fff8e1;border-left:4px solid #ffc107;padding:1rem 1.25rem;margin:1.5rem 0;border-radius:4px;}.notice p{margin-bottom:0.5rem;color:#856404;font-weight:500;}.notice ul{margin-top:0.75rem;}.notice li{padding:0.25rem 0;}.notice a{color:#856404;font-weight:500;}/* 站点介绍 */.site-intro{background:#fff;padding:2rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.08);margin-bottom:2.5rem;}.site-intro h2{color:#222;margin-top:0;margin-bottom:1rem;}.site-intro p{color:#555;font-size:1.05rem;line-height:1.8;}/* 分区标题 */section{margin-bottom:3rem;}section h2{color:#222;font-size:1.5rem;margin-bottom:1.25rem;padding-bottom:0.5rem;border-bottom:2px solid #e0e0e0;}/* 卡片网格 */.video-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:1.5rem;}@media (max-width:768px){.video-grid{grid-template-columns:1fr;gap:1rem;}}.video-card{background:#fff;padding:1.5rem;border-radius:8px;box-shadow:0 2px 8px rgba(0,0,0,0.08);transition:transform 0.2s ease,box-shadow 0.2s ease;}.video-card:hover{transform:translateY(-2px);box-shadow:0 4px 12px rgba(0,0,0,0.12);}.video-card h3{font-size:1.15rem;margin-bottom:0.75rem;color:#222;}.video-card h3 a{color:#222;}.video-card h3 a:hover{color:#0066cc;}.video-card .meta{font-size:0.875rem;color:#888;margin-bottom:0.5rem;}.video-card .oneline{color:#555;font-size:0.95rem;margin-bottom:0.5rem;line-height:1.5;}.video-card .summary{color:#666;font-size:0.9rem;line-height:1.6;margin-bottom:0.5rem;}.video-card .tags{font-size:0.8rem;color:#999;margin-top:0.75rem;}/* 列表布局 */.video-list{display:flex;flex-direction:column;gap:1rem;}.video-item{background:#fff;padding:1.25rem 1.5rem;border-radius:6px;border-left:3px solid #0066cc;box-shadow:0 1px 4px rgba(0,0,0,0.08);transition:box-shadow 0.2s ease,transform 0.2s ease;}.video-item:hover{box-shadow:0 2px 8px rgba(0,0,0,0.12);transform:translateX(2px);}.video-item h3{font-size:1.1rem;margin-bottom:0.5rem;color:#222;}.video-item h3 a{color:#222;}.video-item h3 a:hover{color:#0066cc;}.video-item p{color:#666;font-size:0.95rem;line-height:1.6;margin-bottom:0;}/* 详情页 */.video-detail{background:#fff;padding:2.5rem;border-radius:8px;box-shadow:0 2px 12px rgba(0,0,0,0.08);max-width:900px;margin:0 auto;}@media (max-width:768px){.video-detail{padding:1.5rem 1.25rem;}}.video-detail header h1{font-size:2rem;color:#222;margin-bottom:0.5rem;}.video-detail .subtitle{font-size:1rem;color:#888;margin-bottom:1.5rem;}.video-detail section{margin-bottom:2rem;}.video-detail section h2{font-size:1.25rem;color:#333;margin-bottom:1rem;padding-bottom:0.5rem;border-bottom:2px solid #e0e0e0;}.video-detail .basic-info ul{padding-left:0;}.video-detail .basic-info li{padding:0.5rem 0;border-bottom:1px solid #f0f0f0;color:#555;line-height:1.6;}.video-detail .basic-info li:last-child{border-bottom:none;}.video-detail .basic-info strong{color:#333;min-width:5em;display:inline-block;}.video-detail .tag{display:inline-block;background:#f0f0f0;color:#666;padding:0.2rem 0.6rem;border-radius:3px;font-size:0.85rem;margin:0.2rem 0.3rem 0.2rem 0;}.video-detail .oneline p,.video-detail .summary p,.video-detail .review p{color:#555;font-size:1.05rem;line-height:1.8;}.video-detail.invalid{text-align:center;padding:3rem 2rem;}.video-detail.invalid h1{color:#999;margin-bottom:1rem;}.video-detail.invalid p{color:#666;margin-bottom:1rem;}/* 入口区块 */.entrance-section p,.latest-section p{color:#666;margin-bottom:1.5rem;}/* 分区样式调整 */.featured-section{background:linear-gradient(135deg,#f5f7fa 0%,#fff 100%);padding:2rem;border-radius:8px;margin-bottom:3rem;}/* UI风格变体 */.ui-style-4 nav{border-bottom-color:#d32f2f;}.ui-style-4 nav a:hover{background:#fef5f5;color:#d32f2f;}.ui-style-4 .site-header{border-bottom-color:#d32f2f;}.ui-style-4 a{color:#d32f2f;}.ui-style-4 a:hover{color:#b71c1c;}.ui-style-4 .video-item{border-left-color:#d32f2f;}.ui-style-4 section h2{color:#333;}