:root{--fg:#141b29;--muted:#55637a;--accent:#1456d6;--accent-2:#6d3df0;--accent-soft:#edf2fe;--border:#e3e9f2;--bg:#ffffff;--bg-soft:#f6f8fc;--bg-dark:#0c1428;--bg-dark-soft:#16213a;--grad:linear-gradient(120deg,#1456d6,#3f5efb 55%,#6d3df0);--radius-sm:8px;--radius-md:14px;--radius-lg:22px;--shadow-sm:0 1px 2px rgb(16 24 40/5%);--shadow-md:0 6px 20px -4px rgb(16 24 40/10%);--shadow-lg:0 18px 44px -12px rgb(20 86 214/22%);--container:1080px;--header-h:64px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,PingFang SC,Hiragino Sans GB,Microsoft YaHei,Segoe UI,sans-serif;color:var(--fg);background:var(--bg);line-height:1.7;overflow-x:hidden}.container{max-width:var(--container);margin:0 auto;padding:0 20px}a{color:var(--accent);text-decoration:none}a:hover{text-decoration:underline}.muted{color:var(--muted)}.section-head{text-align:center;max-width:640px;margin:0 auto 36px}.section-head h2{font-size:30px;margin:0 0 10px;letter-spacing:-.01em}.section-head p{margin:0;color:var(--muted)}.pill{display:inline-block;padding:3px 12px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:13px;font-weight:600;line-height:1.6}.pill-row{display:flex;flex-wrap:wrap;gap:8px}[data-cta]{display:inline-block;padding:13px 30px;border-radius:10px;font-weight:600;font-size:16px;transition:transform .15s ease,box-shadow .15s ease,background .15s ease}.btn-primary,[data-cta=b2c]{background:var(--grad);color:#fff;box-shadow:0 8px 20px -6px rgb(20 86 214/45%)}.btn-ghost,[data-cta=b2b]{background:var(--bg);color:var(--accent);border:1px solid var(--border);box-shadow:var(--shadow-sm)}.btn-ghost:hover,.btn-primary:hover,[data-cta]:hover{text-decoration:none;transform:translateY(-2px);box-shadow:var(--shadow-lg)}.btn-ghost,.btn-primary{display:inline-block;padding:13px 30px;border-radius:10px;font-weight:600;font-size:16px;transition:transform .15s ease,box-shadow .15s ease}button.btn-ghost,button.btn-primary{border:none;cursor:pointer;font-family:inherit;line-height:1.5}button.btn-ghost{border:1px solid var(--border)}.cta-banner .btn-ghost{background:transparent;color:#fff;border-color:rgb(255 255 255/40%)}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:50;border-bottom:1px solid rgb(227 233 242/80%);background:rgb(255 255 255/82%);backdrop-filter:saturate(160%) blur(12px);-webkit-backdrop-filter:saturate(160%) blur(12px)}.site-header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;height:var(--header-h)}.site-header .brand{font-weight:800;font-size:19px;color:var(--fg);letter-spacing:-.01em}.site-header .brand:hover{text-decoration:none}.site-nav{display:flex;align-items:center;gap:24px}.site-nav a{color:var(--fg);font-size:15px}.site-nav a:hover{color:var(--accent);text-decoration:none}.header-cta{display:inline-block;padding:8px 18px;border-radius:8px;background:var(--grad);color:#fff!important;font-weight:600;font-size:14px;box-shadow:0 4px 12px -4px rgb(20 86 214/45%)}.header-cta:hover{text-decoration:none;box-shadow:var(--shadow-md)}.nav-toggle{display:none}.nav-toggle-label{display:none;flex-direction:column;justify-content:center;gap:5px;width:40px;height:40px;padding:8px;cursor:pointer}.nav-toggle-label span{display:block;height:2px;border-radius:2px;background:var(--fg);transition:transform .2s ease,opacity .2s ease}.hero{position:relative;padding:96px 0 72px;text-align:center;margin-inline:calc(50% - 50vw);padding-inline:calc(50vw - 50%);background:linear-gradient(180deg,#f4f7ff 0,var(--bg) 100%);overflow:hidden}.hero:before{content:"";position:absolute;inset:0;pointer-events:none;background:radial-gradient(520px 320px at 18% 12%,rgb(20 86 214/14%),transparent 70%),radial-gradient(560px 340px at 84% 8%,rgb(109 61 240/13%),transparent 70%)}.hero>*{position:relative}.hero .pill{margin-bottom:18px;background:#fff;border:1px solid var(--border);box-shadow:var(--shadow-sm)}.hero h1{font-size:52px;line-height:1.2;letter-spacing:-.02em;margin:0 0 16px;background:linear-gradient(115deg,#101828 30%,#1456d6 75%,#6d3df0);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.hero>p{color:var(--muted);font-size:19px;margin:0 auto 32px;max-width:620px}[data-slot=cta-group]{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}.stats-bar{display:grid;grid-template-columns:repeat(auto-fit,minmax(160px,1fr));grid-gap:16px;gap:16px;margin:-36px auto 56px;position:relative;z-index:1}.stat{background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);padding:20px 16px;text-align:center;box-shadow:var(--shadow-md)}.stat-num{display:block;font-size:30px;font-weight:800;letter-spacing:-.02em;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}.stat-label{display:block;margin-top:4px;color:var(--muted);font-size:14px}.card-grid,[data-slot=plan-grid]{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));grid-gap:20px;gap:20px;margin:20px 0 48px}.card,[data-slot=plan-card]{border:1px solid var(--border);border-radius:var(--radius-md);padding:24px;background:var(--bg);box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.card:hover,[data-slot=plan-card]:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgb(20 86 214/35%)}[data-slot=plan-card][data-highlighted]{border-color:var(--accent);box-shadow:0 8px 24px rgb(20 86 214/14%)}.card h2,.card h3,[data-slot=plan-card] h2{margin-top:0;font-size:19px}[data-slot=price]{font-size:20px;font-weight:700;color:var(--accent)}.card ul,[data-slot=plan-card] ul{list-style:none;padding:0;margin:12px 0 16px}.card li,[data-slot=plan-card] li{position:relative;padding-left:24px;margin:6px 0;color:var(--muted);font-size:15px}.card li:before,[data-slot=plan-card] li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.card [data-slot=cta],[data-slot=plan-cta]{display:inline-block;margin-top:8px;padding:9px 22px;border-radius:8px;background:var(--accent-soft);color:var(--accent);font-weight:600;transition:background .15s ease,color .15s ease}.card [data-slot=cta]:hover,[data-slot=plan-cta]:hover{text-decoration:none;background:var(--accent);color:#fff}.why{background:var(--bg-soft);border:1px solid var(--border);border-radius:var(--radius-lg);padding:32px 36px;margin-bottom:48px}.why h2{margin-top:0}.why ul{list-style:none;padding:0}.why li{position:relative;padding-left:26px;margin:10px 0}.why li:before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:700}.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));grid-gap:20px;gap:20px;margin:24px 0 48px;counter-reset:step}.step{position:relative;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);padding:24px 22px 22px;box-shadow:var(--shadow-sm)}.step-num{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:50%;background:var(--grad);color:#fff;font-weight:700;font-size:16px;box-shadow:0 6px 14px -4px rgb(20 86 214/45%);margin-bottom:12px}.step h3{margin:0 0 6px;font-size:17px}.step p{margin:0;color:var(--muted);font-size:15px}.post-card{display:flex;flex-direction:column;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg);padding:22px;box-shadow:var(--shadow-sm);transition:transform .18s ease,box-shadow .18s ease,border-color .18s ease}.post-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:rgb(20 86 214/35%)}.post-card h3{margin:0 0 8px;font-size:18px;line-height:1.5}.post-card h3 a{color:var(--fg)}.post-card h3 a:hover{color:var(--accent);text-decoration:none}.post-card .post-date{color:var(--muted);font-size:13px;margin-bottom:10px}.post-card p{margin:0 0 14px;color:var(--muted);font-size:15px;flex:1 1}.cta-banner{margin:56px calc(50% - 50vw) 0;padding:72px calc(50vw - 50%);text-align:center;color:#fff;background:radial-gradient(640px 300px at 12% 0,rgb(63 94 251/35%),transparent 70%),radial-gradient(640px 300px at 90% 100%,rgb(109 61 240/32%),transparent 70%),var(--bg-dark)}.cta-banner h2{font-size:34px;letter-spacing:-.01em;margin:0 0 12px}.cta-banner p{color:rgb(255 255 255/72%);font-size:17px;margin:0 auto 30px;max-width:560px}.cta-strip{display:flex;align-items:center;justify-content:space-between;gap:20px;flex-wrap:wrap;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-soft);padding:24px 28px;margin:48px 0}.cta-strip h3{margin:0 0 4px}.cta-strip p{margin:0;color:var(--muted);font-size:15px}.blog-list ul,.post-list{list-style:none;padding:0}.blog-list li,.post{border-bottom:1px solid var(--border);padding:16px 0}.post-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));grid-gap:20px;gap:20px;margin:24px 0 48px}.prose{max-width:760px}.prose h2{margin-top:40px;border-bottom:1px solid var(--border);padding-bottom:6px}.prose table{border-collapse:collapse;width:100%;margin:16px 0;font-size:15px}.compare table td,.compare table th,.prose td,.prose th{border:1px solid var(--border);padding:8px 12px;text-align:left}.compare table th,.prose th{background:var(--bg-soft)}.prose pre{background:#0f1722;color:#dbe7f3;padding:16px;border-radius:var(--radius-sm);overflow-x:auto}.prose code{background:var(--bg-soft);padding:2px 6px;border-radius:4px;font-size:.92em}.prose pre code{background:none;padding:0}.prose blockquote{border-left:3px solid var(--accent);margin:16px 0;padding:4px 16px;color:var(--muted)}.blog-post header h1{font-size:36px;line-height:1.3;letter-spacing:-.01em;margin-bottom:12px}.blog-post [data-slot=description]{color:var(--muted);font-size:17px}.blog-post [data-slot=meta]{display:block;margin-top:8px}.blog-post [data-slot=meta],.reading-time{color:var(--muted);font-size:14px}.compare table{border-collapse:collapse;width:100%;margin:16px 0}.lead-form{display:grid;grid-gap:12px;gap:12px;max-width:480px;margin-top:20px}.lead-form input,.lead-form textarea{padding:10px 12px;border:1px solid var(--border);border-radius:var(--radius-sm);font-size:15px;font-family:inherit}.lead-form input:focus,.lead-form textarea:focus{outline:2px solid rgb(20 86 214/30%);border-color:var(--accent)}.lead-form [type=submit],.lead-form button{padding:12px;border:none;border-radius:var(--radius-sm);background:var(--grad);color:#fff;font-weight:600;cursor:pointer}.author-card,[data-slot=author-card]{display:flex;gap:12px;align-items:center;border:1px solid var(--border);border-radius:var(--radius-md);padding:14px 18px;margin:32px 0;background:var(--bg-soft)}.author-card p,[data-slot=author-card] p{margin:0;color:var(--muted);font-size:14px}.faq details,[data-slot=faq] details{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--bg);padding:14px 18px;margin:10px 0;transition:border-color .15s ease,box-shadow .15s ease}.faq details[open],[data-slot=faq] details[open]{border-color:rgb(20 86 214/35%);box-shadow:var(--shadow-sm)}.faq summary,[data-slot=faq] summary{font-weight:600;cursor:pointer;list-style:none;position:relative;padding-right:28px}.faq summary:after,[data-slot=faq] summary:after{content:"+";position:absolute;right:2px;top:0;color:var(--accent);font-size:20px;font-weight:500;line-height:1.4}.faq details[open] summary:after,[data-slot=faq] details[open] summary:after{content:"−"}.faq details p,[data-slot=faq] details p{margin:10px 0 2px;color:var(--muted)}.site-footer{margin-top:0;padding:56px 0 28px;border-top:1px solid var(--border);background:var(--bg-soft);color:var(--muted);font-size:14px}.footer-grid{display:grid;grid-template-columns:1.4fr repeat(3,1fr);grid-gap:32px;gap:32px;padding-bottom:36px;border-bottom:1px solid var(--border)}.footer-brand p{margin:8px 0 0;max-width:280px}.footer-brand .brand{font-weight:800;font-size:17px;color:var(--fg)}.footer-col h4{margin:0 0 12px;font-size:14px;color:var(--fg)}.footer-col ul{list-style:none;padding:0;margin:0}.footer-col li{margin:8px 0}.footer-col a{color:var(--muted)}.footer-col a:hover{color:var(--accent);text-decoration:none}.footer-bottom{display:flex;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-top:20px}.footer-bottom p{margin:0}.footer-bottom a{color:var(--muted)}a.pill:hover{background:var(--accent);color:#fff}.tag-cloud{display:flex;flex-wrap:wrap;gap:12px;margin-top:8px}.tag-chip{display:inline-flex;align-items:center;gap:8px;padding:8px 16px;border-radius:999px;background:var(--accent-soft);color:var(--accent);font-size:14.5px;font-weight:600;border:1px solid transparent;transition:all .18s ease}.tag-chip:hover{border-color:var(--accent);box-shadow:var(--shadow-sm)}.tag-count{background:var(--accent);color:#fff;border-radius:999px;font-size:12px;font-weight:700;padding:1px 8px}.pagination{display:flex;justify-content:center;flex-wrap:wrap;gap:8px;margin:36px 0 8px}.page-btn{display:inline-block;padding:7px 14px;border-radius:var(--radius-sm);border:1px solid var(--border);color:var(--fg);font-size:14px;background:var(--bg);transition:all .18s ease}a.page-btn:hover{border-color:var(--accent);color:var(--accent)}.page-btn.current{background:var(--grad);border-color:transparent;color:#fff;font-weight:700}.page-btn.disabled{color:var(--muted);opacity:.5}.search-box{position:relative;display:inline-flex;align-items:center}.search-box input{width:150px;padding:7px 12px;border:1px solid var(--border);border-radius:999px;font-size:13.5px;background:var(--bg-soft);color:var(--fg);outline:none;transition:width .2s ease,border-color .2s ease}.search-box input:focus{width:210px;border-color:var(--accent);background:var(--bg)}.search-results{position:absolute;top:calc(100% + 8px);right:0;width:340px;max-height:420px;overflow-y:auto;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);z-index:60;padding:6px}.search-item{display:block;padding:10px 12px;border-radius:var(--radius-sm);color:var(--fg)}.search-item:hover{background:var(--accent-soft)}.search-item-title{display:block;font-size:14px;font-weight:600;line-height:1.45}.search-item-desc{display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;font-size:12.5px;color:var(--muted);margin-top:2px}.search-empty{padding:14px;font-size:13px;color:var(--muted);text-align:center}.subscribe-box{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap;margin:44px 0 8px;padding:28px 32px;border-radius:var(--radius-lg);background:var(--bg-soft);border:1px solid var(--border)}.subscribe-box h3{margin:0 0 6px;font-size:19px}.subscribe-box p{margin:0;font-size:14px}.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 230px;grid-gap:44px;gap:44px;align-items:start}.toc{position:-webkit-sticky;position:sticky;top:calc(var(--header-h) + 24px);margin-top:56px;padding:18px 20px;border:1px solid var(--border);border-radius:var(--radius-md);background:var(--bg-soft);max-height:calc(100vh - var(--header-h) - 48px);overflow-y:auto}.toc h2{margin:0 0 10px;font-size:14px;color:var(--muted);font-weight:700;letter-spacing:.04em}.toc ul{list-style:none;padding:0}.toc li,.toc ul{margin:0}.toc li a{display:block;font-size:13.5px;line-height:1.5;color:var(--fg);border-left:2px solid var(--border);padding:5px 0 5px 12px}.toc li a:hover{color:var(--accent);border-left-color:var(--accent)}.toc li.toc-sub a{padding-left:26px;font-size:13px;color:var(--muted)}.prose h2,.prose h3{scroll-margin-top:calc(var(--header-h) + 16px)}@media (max-width:1024px){.article-layout{grid-template-columns:1fr}.toc{display:none}}@media (max-width:768px){.hero{padding:64px 20px 56px}.hero h1{font-size:34px}.hero>p{font-size:16px}.section-head h2{font-size:24px}.cta-banner h2{font-size:26px}.blog-post header h1{font-size:27px}.card-grid,.post-grid,.stats-bar,.steps,[data-slot=plan-grid]{grid-template-columns:1fr}.stats-bar{margin-top:-24px}.footer-grid{grid-template-columns:1fr 1fr;gap:24px}.nav-toggle-label{display:flex}.site-nav{position:absolute;top:var(--header-h);left:0;right:0;display:none;flex-direction:column;align-items:stretch;gap:0;background:var(--bg);box-shadow:var(--shadow-md);padding:8px 20px 16px}.site-nav,.site-nav a{border-bottom:1px solid var(--border)}.site-nav a{padding:12px 0}.site-nav a:last-child{border-bottom:none}.site-nav .header-cta{margin-top:12px;text-align:center}.site-nav .search-box{display:flex;padding:12px 0;border-bottom:1px solid var(--border)}.site-nav .search-box input,.site-nav .search-box input:focus{width:100%}.site-nav .search-results{left:0;right:0;width:auto}.nav-toggle:checked~.site-nav{display:flex}.nav-toggle:checked~.nav-toggle-label span:first-child{transform:translateY(7px) rotate(45deg)}.nav-toggle:checked~.nav-toggle-label span:nth-child(2){opacity:0}.nav-toggle:checked~.nav-toggle-label span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}}.lang-switch{display:inline-block;padding:4px 10px;border:1px solid var(--border,#e2e8f0);border-radius:999px;font-size:13px;line-height:1.4}.lang-switch:hover{border-color:var(--accent)}.lang-hint{position:fixed;left:50%;bottom:16px;transform:translateX(-50%);display:flex;align-items:center;gap:12px;padding:10px 16px;border-radius:10px;background:var(--card,#fff);border:1px solid var(--border,#e2e8f0);box-shadow:0 8px 24px rgb(15 23 42/.12);font-size:14px;z-index:60;max-width:min(92vw,560px)}.lang-hint a{color:var(--accent);font-weight:600;white-space:nowrap}.lang-hint button{border:none;background:none;font-size:18px;line-height:1;cursor:pointer;color:var(--muted,#64748b);padding:0 2px}.site-nav a.nav-active{color:var(--accent);font-weight:600;position:relative}.site-nav a.nav-active:after{content:"";position:absolute;left:50%;bottom:-6px;transform:translateX(-50%);width:18px;height:2px;border-radius:1px;background:var(--accent)}