:root{--btf-blue: #49b1f5;--btf-text: #4c4948;--btf-shadow: 0 3px 8px 6px rgba(7, 17, 27, .05)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#f7f7f7;color:var(--btf-text);font-family:PingFang SC,-apple-system,BlinkMacSystemFont,Microsoft Yahei,Segoe UI,sans-serif;line-height:2}a{text-decoration:none;color:var(--btf-blue)}#blog-nav{position:fixed;top:0;left:0;width:100%;height:60px;z-index:90;display:flex;align-items:center;justify-content:space-between;padding:0 36px;color:#fff;transition:all .3s ease}#blog-nav.solid{background:#fff;box-shadow:0 2px 12px #00000014;color:var(--btf-text)}#blog-nav .site-name{font-size:20px;font-weight:700;color:inherit}#blog-nav .menus{display:flex;gap:22px}#blog-nav .menus a{color:inherit;font-size:15px;opacity:.95;transition:color .2s}#blog-nav.solid .menus a:hover{color:var(--btf-blue)}#page-header{position:relative;width:100%;background-size:cover;background-position:center;background-color:#49b1f5;display:flex;align-items:center;justify-content:center;text-align:center;color:#fff}#page-header.full{height:100vh}#page-header.post{height:60vh;min-height:400px}#page-header.post .header-mask{position:absolute;inset:0;background:#0006}#page-header.full .header-mask{display:none}.header-info{position:relative;z-index:2;padding:0 20px;max-width:1000px}.scroll-down{position:absolute;bottom:24px;left:50%;transform:translate(-50%);color:#fff;font-size:30px;z-index:2;animation:bounce 2s infinite}@keyframes bounce{0%,to{transform:translate(-50%)}50%{transform:translate(-50%,-12px)}}.blog-hero-title{font-size:2.6rem;font-weight:700;letter-spacing:2px}.blog-hero-sub{font-size:1rem;letter-spacing:3px;opacity:.9;margin-top:6px}.blog-hero-channels{margin-top:36px;display:flex;gap:60px;flex-wrap:wrap;justify-content:center}.blog-hero-block .label{font-size:14px;opacity:.9;margin-bottom:10px}.blog-hero-social a{color:#fff;width:40px;height:40px;display:inline-flex;align-items:center;justify-content:center;border-radius:50%;background:#fff3;margin:0 5px;font-size:18px}.blog-hero-dl a{display:inline-flex;align-items:center;gap:8px;background:#000;color:#fff;border-radius:30px;padding:8px 18px;margin:0 5px;font-weight:600}.post-hero-cat{font-size:14px;opacity:.92;margin-bottom:10px}.post-hero-title{font-size:2.1rem;font-weight:700;line-height:1.4}.post-hero-meta{margin-top:16px;font-size:14px;opacity:.92}.post-hero-meta span{margin:0 10px}.layout{display:flex;gap:20px;max-width:1200px;margin:0 auto;padding:40px 16px 20px;align-items:flex-start}.content{flex:1 1 auto;min-width:0}.sidebar{flex:0 0 280px;width:280px}@media(max-width:900px){.layout{flex-direction:column}.sidebar{width:100%;flex:none}#blog-nav .menus{gap:14px}#blog-nav .menus a:not(:first-child){display:none}}.recent-post-item{display:flex;background:#fff;border-radius:8px;overflow:hidden;margin-bottom:20px;box-shadow:var(--btf-shadow);transition:box-shadow .3s ease;height:240px}.recent-post-item:hover{box-shadow:0 6px 18px 8px #07111b1a}.recent-post-item:nth-child(2n){flex-direction:row-reverse}.post_cover{width:45%;overflow:hidden}.post_cover img{width:100%;height:100%;object-fit:cover;transition:transform .6s ease}.recent-post-item:hover .post_cover img{transform:scale(1.1)}.recent-post-info{width:55%;padding:0 40px;display:flex;flex-direction:column;justify-content:center}.recent-post-info .article-title{font-size:1.5rem;font-weight:700;color:#1f2d3d;line-height:1.4;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.recent-post-info .article-title:hover{color:var(--btf-blue)}.recent-post-info .article-meta{color:#858585;font-size:13px;margin:10px 0}.recent-post-info .article-meta i{margin-right:5px}.recent-post-info .content-excerpt{color:#858585;font-size:14px;line-height:1.8;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.post-cat-badge{display:inline-block;background:var(--btf-blue);color:#fff;font-size:12px;border-radius:4px;padding:1px 8px;margin-left:8px}@media(max-width:600px){.recent-post-item,.recent-post-item:nth-child(2n){flex-direction:column;height:auto}.post_cover{width:100%;height:200px}.recent-post-info{width:100%;padding:20px}}.card-widget{background:#fff;border-radius:8px;padding:22px 20px;margin-bottom:20px;box-shadow:var(--btf-shadow)}.card-author{text-align:center}.card-author .author-name{font-size:1.3rem;font-weight:700;color:#1f2d3d;margin:6px 0 8px}.card-author .author-desc{color:#777;font-size:13px;line-height:1.8}.card-author .author-stats{display:flex;justify-content:space-around;margin-top:16px}.card-author .author-stats .num{font-size:1.1rem;font-weight:700;color:#1f2d3d}.card-author .author-stats .lbl{font-size:12px;color:#858585}.card-widget .item-headline{font-size:1.05rem;font-weight:700;color:#1f2d3d;margin-bottom:14px}.card-widget .item-headline i{color:var(--btf-blue);margin-right:6px}.recent-list-item{display:flex;gap:12px;margin-bottom:14px;align-items:center}.recent-list-item:last-child{margin-bottom:0}.recent-list-item .thumb{width:64px;height:48px;border-radius:6px;object-fit:cover;flex:0 0 64px;background:#eee}.recent-list-item .rt{font-size:13px;color:#4c4948;line-height:1.5;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}.recent-list-item .rd{font-size:12px;color:#aaa}.pagination{display:flex;justify-content:center;gap:8px;margin:24px 0 40px}.pagination a,.pagination span{min-width:38px;height:38px;padding:0 10px;display:inline-flex;align-items:center;justify-content:center;background:#fff;border-radius:6px;color:#4c4948;box-shadow:var(--btf-shadow);font-size:14px}.pagination .current{background:var(--btf-blue);color:#fff}.article-container{background:#fff;border-radius:8px;padding:36px 40px;box-shadow:var(--btf-shadow)}.article-container h1,.article-container h2,.article-container h3{color:#1f2d3d;font-weight:700;line-height:1.5;margin:1.6rem 0 1rem}.article-container h2{font-size:1.5rem;border-left:4px solid var(--btf-blue);padding-left:12px}.article-container h3{font-size:1.25rem}.article-container p{margin:1rem 0}.article-container img{max-width:100%;height:auto;border-radius:8px;display:block;margin:1.2rem auto}.article-container a{color:var(--btf-blue);border-bottom:1px solid var(--btf-blue)}.article-container ul,.article-container ol{padding-left:1.6rem}.article-container li{margin:.4rem 0}.article-container blockquote{border-left:4px solid var(--btf-blue);background:#f6f8fa;margin:1.2rem 0;padding:10px 16px;color:#666;border-radius:0 6px 6px 0}.article-container code{background:#f6f8fa;padding:2px 6px;border-radius:4px;color:#e96900;font-size:.9em}.back-to-list{display:inline-block;margin-top:8px}@media(max-width:600px){#page-header.post{height:50vh;min-height:300px}.post-hero-title{font-size:1.5rem}.blog-hero-title{font-size:1.8rem}.article-container{padding:24px 18px}}#blog-footer{background:#49b1f5;color:#fff;text-align:center;padding:28px 16px}#blog-footer .footer-line{font-size:13px;opacity:.95;line-height:2}