:root{--c-text:#1b1f24;--c-muted:#57606a;--c-faint:#8b949e;--c-border:#d8dee4;--c-border-strong:#c6ced6;--c-accent:#379237;--c-accent-strong:#2d7a2d;--c-accent-soft:#eef6ee;--c-accent-border:#cfe3cf;--c-bg:#fff;--c-bg-soft:#f6f8fa;--c-bg-code:#f6f8fa;--c-shadow-sm:0 1px 2px #1018280d;--c-shadow:0 1px 3px #10182812, 0 4px 14px #1018280d;--c-shadow-lg:0 8px 30px #1018281a;--max:800px;--header-h:60px;--radius:10px;--radius-sm:6px;--font-sans:-apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;--font-mono:ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", "PingFang SC", "Microsoft YaHei", monospace}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--header-h) + 16px)}body{background:var(--c-bg);color:var(--c-text);font-family:var(--font-sans);letter-spacing:.005em;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;margin:0;font-size:16px;line-height:1.75}::selection{background:var(--c-accent-soft);color:var(--c-accent-strong)}.wrap{max-width:var(--max);margin:0 auto;padding:0 24px}header.site{z-index:50;-webkit-backdrop-filter:saturate(180%)blur(12px);border-bottom:1px solid var(--c-border);background:#ffffffdb;position:sticky;top:0}header.site:before{content:"";background:linear-gradient(90deg, var(--c-accent), #5bb85b);height:3px;position:absolute;top:0;left:0;right:0}.header-inner{height:var(--header-h);justify-content:space-between;align-items:center;gap:16px;display:flex}a.brand{color:var(--c-text);align-items:center;gap:10px;text-decoration:none;display:flex}.brand .logo{object-fit:contain;flex:none;width:32px;height:32px;display:block}.brand-text{flex-direction:column;line-height:1.25;display:flex}.brand-name{letter-spacing:.01em;font-size:16px;font-weight:700}.brand-tag{color:var(--c-muted);font-size:11px}header.site nav{align-items:center;gap:2px;display:flex}header.site nav a{color:var(--c-muted);white-space:nowrap;border-radius:8px;padding:6px 10px;font-size:14px;text-decoration:none;transition:color .15s,background .15s}header.site nav a:hover{color:var(--c-accent);background:var(--c-accent-soft)}header.site nav a.active{color:var(--c-accent-strong);font-weight:600}header.site nav .nav-drop{align-items:center;display:flex;position:relative}header.site nav .nav-drop>a:after{content:"▾";opacity:.65;margin-left:3px;font-size:10px}header.site nav .nav-drop-menu{border:1px solid var(--c-border);border-radius:var(--radius-sm);min-width:168px;box-shadow:var(--c-shadow);z-index:60;background:#fff;flex-direction:column;gap:2px;margin-top:4px;padding:6px;display:none;position:absolute;top:100%;left:50%;transform:translate(-50%)}header.site nav .nav-drop:hover .nav-drop-menu,header.site nav .nav-drop:focus-within .nav-drop-menu{display:flex}header.site nav .nav-drop-menu a{color:var(--c-text);padding:7px 12px}header.site nav .nav-drop-menu a:hover{background:var(--c-accent-soft);color:var(--c-accent-strong)}main{min-height:60vh;padding:40px 0 80px}footer.site{border-top:1px solid var(--c-border);background:var(--c-bg-soft);color:var(--c-muted);font-size:14px}.footer-grid{flex-wrap:wrap;gap:40px;padding-top:40px;padding-bottom:28px;display:flex}.footer-brand{flex:260px}.footer-logo{color:var(--c-text);margin:0 0 8px;font-size:16px;font-weight:700}.footer-desc{max-width:42ch;margin:0}.footer-links{flex-direction:column;gap:7px;display:flex}.footer-label{color:var(--c-text);letter-spacing:.04em;font-size:13px;font-weight:600}.footer-links a{color:var(--c-muted);text-decoration:none}.footer-links a:hover{color:var(--c-accent)}.footer-bottom{border-top:1px solid var(--c-border);color:var(--c-faint);padding-top:16px;padding-bottom:22px;font-size:13px}.footer-bottom p{margin:0}.hero{padding:8px 0 32px}.hero h1{letter-spacing:-.01em;margin:0 0 12px;font-size:34px}.hero .lead{font-size:18px}.hero-meta{color:var(--c-muted);margin:0;font-size:14px}.article-head{border-bottom:1px solid var(--c-border);margin-bottom:28px;padding:8px 0 28px}.article-head h1{letter-spacing:-.01em;margin:14px 0;font-size:32px;line-height:1.35}.meta{color:var(--c-muted);flex-wrap:wrap;gap:6px 16px;margin:0;font-size:14px;display:flex}.meta span{align-items:center;display:inline-flex}.badge{color:var(--c-accent-strong);background:var(--c-accent-soft);border:1px solid var(--c-accent-border);white-space:nowrap;border-radius:999px;align-items:center;padding:3px 10px;font-size:12px;font-weight:600;line-height:1.4;display:inline-flex}.prose{font-size:16.5px}.prose>:first-child{margin-top:0}.prose h2{border-bottom:1px solid var(--c-border);scroll-margin-top:calc(var(--header-h) + 20px);margin:44px 0 14px;padding-bottom:8px;font-size:24px;line-height:1.4;position:relative}.prose h3{scroll-margin-top:calc(var(--header-h) + 20px);margin:30px 0 12px;font-size:19px;position:relative}.prose h4{margin:24px 0 10px;font-size:16.5px}.prose h2:before,.prose h3:before{content:"#";color:var(--c-accent);opacity:0;font-weight:500;transition:opacity .15s;position:absolute;left:-.85em}.prose h2:hover:before,.prose h3:hover:before{opacity:.6}.prose p{margin:0 0 18px}.prose a{color:var(--c-accent);text-underline-offset:3px;text-decoration:underline 1px}.prose a:hover{color:var(--c-accent-strong)}.prose ul,.prose ol{margin:0 0 18px;padding-left:1.4em}.prose li,.prose li>ul,.prose li>ol{margin:6px 0}.prose strong{color:var(--c-text);font-weight:600}.prose img{border-radius:var(--radius);border:1px solid var(--c-border);max-width:100%;height:auto}.prose hr{border:0;border-top:1px solid var(--c-border);margin:36px 0}.prose code{font-family:var(--font-mono);font-size:.88em}.prose :not(pre)>code{background:var(--c-accent-soft);border:1px solid var(--c-accent-border);color:#21603a;white-space:nowrap;border-radius:5px;padding:2px 6px}.prose pre{border:1px solid var(--c-border);border-radius:var(--radius);box-shadow:var(--c-shadow-sm);margin:20px 0;padding:16px 18px;font-size:13.5px;line-height:1.65;overflow-x:auto;background-color:var(--c-bg-code)!important}.prose pre code{background:0 0;border:0;padding:0}.prose pre[data-language]{padding-top:42px;position:relative}.prose pre[data-language]:before{content:attr(data-language);font-family:var(--font-mono);letter-spacing:.06em;text-transform:uppercase;color:var(--c-muted);border-bottom:1px solid var(--c-border);border-right:1px solid var(--c-border);border-radius:var(--radius) 0 8px 0;background:#eef1f4;padding:4px 12px;font-size:11px;position:absolute;top:0;left:0}.prose blockquote{border-left:3px solid var(--c-accent);background:var(--c-accent-soft);border-radius:0 var(--radius-sm) var(--radius-sm) 0;color:#3d464f;margin:22px 0;padding:14px 18px}.prose blockquote p{margin:0 0 8px}.prose blockquote p:last-child{margin-bottom:0}.prose table{border-collapse:collapse;border:1px solid var(--c-border);width:100%;margin:22px 0;font-size:14.5px}.prose th,.prose td{border:1px solid var(--c-border);text-align:left;vertical-align:top;padding:9px 14px}.prose th{background:var(--c-bg-soft);color:var(--c-text);white-space:nowrap;font-weight:600}.prose tr:nth-child(2n) td{background:#fbfcfd}.tags{border-top:1px solid var(--c-border);margin-top:44px;padding-top:20px}.tags a{background:var(--c-bg-soft);border:1px solid var(--c-border);color:var(--c-muted);border-radius:999px;margin:0 6px 8px 0;padding:4px 12px;font-size:13px;text-decoration:none;transition:color .15s,border-color .15s,background .15s;display:inline-block}.tags a:hover{color:var(--c-accent-strong);border-color:var(--c-accent-border);background:var(--c-accent-soft)}.faq{margin-top:48px}.faq>h2{margin:0 0 14px;font-size:20px}.faq details{border:1px solid var(--c-border);border-radius:var(--radius-sm);background:var(--c-bg-soft);margin-bottom:10px;padding:14px 18px;transition:border-color .15s,background .15s}.faq details[open]{background:var(--c-accent-soft);border-color:var(--c-accent-border)}.faq summary{cursor:pointer;font-weight:600}.faq summary::marker{color:var(--c-accent)}.faq details p{margin:10px 0 0}.post-nav{border-top:1px solid var(--c-border);grid-template-columns:1fr 1fr;gap:16px;margin-top:48px;padding-top:24px;display:grid}.post-nav a{border:1px solid var(--c-border);border-radius:var(--radius);padding:14px 16px;text-decoration:none;transition:border-color .15s,box-shadow .15s;display:block}.post-nav a:hover{border-color:var(--c-accent-border);box-shadow:var(--c-shadow)}.post-nav .nav-dir{color:var(--c-muted);margin-bottom:4px;font-size:12px;display:block}.post-nav .nav-title{color:var(--c-text);font-size:15px;font-weight:600;line-height:1.45}.post-nav .next{text-align:right}.back-home{margin-top:20px}.back-home a{color:var(--c-muted);font-size:14px;text-decoration:none}.back-home a:hover{color:var(--c-accent)}.post-list{margin:0;padding:0;list-style:none}.post-card{border:1px solid var(--c-border);border-radius:var(--radius);background:var(--c-bg);margin-bottom:16px;padding:22px 24px;transition:border-color .15s,box-shadow .15s,transform .15s}.post-card:hover{border-color:var(--c-accent-border);box-shadow:var(--c-shadow);transform:translateY(-1px)}.post-card-top{justify-content:space-between;align-items:center;gap:12px;margin-bottom:10px;display:flex}.post-card time{color:var(--c-faint);white-space:nowrap;font-size:13px}.post-card h2{border:0;margin:0 0 8px;padding:0;font-size:20px;line-height:1.45}.post-card h2 a{color:var(--c-text);text-decoration:none}.post-card h2 a:hover{color:var(--c-accent)}.post-card-desc{color:var(--c-muted);margin:0 0 14px;font-size:15px}.post-card-tags{flex-wrap:wrap;gap:6px;display:flex}.mini-tag{color:var(--c-muted);background:var(--c-bg-soft);border:1px solid var(--c-border);border-radius:999px;padding:2px 9px;font-size:12px}.read-more{color:var(--c-accent);margin-top:14px;font-size:14px;font-weight:600;text-decoration:none;display:inline-block}.read-more:hover{color:var(--c-accent-strong)}@media (width<=640px){.wrap{padding:0 18px}header.site nav{gap:0}header.site nav a{padding:6px 7px;font-size:13px}header.site nav a.nav-web{display:none}header.site nav .nav-drop-menu{display:none!important}header.site nav .nav-drop>a:after{content:"";margin:0}.brand-tag{display:none}main{padding:28px 0 56px}.hero h1{font-size:28px}.article-head h1{font-size:26px}.prose{font-size:16px}.prose h2{font-size:21px}.prose h3{font-size:18px}.prose table{white-space:nowrap;-webkit-overflow-scrolling:touch;display:block;overflow-x:auto}.post-nav{grid-template-columns:1fr}.post-nav .next{text-align:left}.post-card{padding:18px}.footer-grid{flex-direction:column;gap:24px}}
