:root{--brand:#1f6bff;--brand2:#00cfe8;--ink:#0f1b33;--muted:#5c6b85;--line:#e6ecf6;--bg:#f4f8ff;--card:#fff;--dark:#081226;--grad:linear-gradient(135deg,#1f6bff,#00cfe8);--shadow:0 10px 30px rgba(15,40,90,.08);--shadow-h:0 18px 44px rgba(15,40,90,.16);--r:16px}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--ink);background:var(--bg);line-height:1.7;font-size:16px}
img{max-width:100%;height:auto;display:block}
a{color:var(--brand);text-decoration:none}
h1,h2,h3,h4{margin:0 0 .5em;line-height:1.28;font-weight:800}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px}
.skip:focus{left:12px;top:12px;background:#fff;padding:8px 14px;border-radius:8px;z-index:999}
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(8,18,38,.28);backdrop-filter:blur(10px);transition:background .3s,box-shadow .3s}
.site-header.solid{background:rgba(8,18,38,.94);box-shadow:0 6px 24px rgba(0,0,0,.28)}
.nav-inner{display:flex;align-items:center;gap:18px;height:68px;max-width:1180px;margin:0 auto;padding:0 20px}
.logo{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:19px;flex:0 0 auto}
.logo img{width:32px;height:32px;border-radius:9px}
.main-nav{margin-left:auto;display:flex;align-items:center;gap:6px}
.nav-item{position:relative}
.nav-link,.dd-label{display:flex;align-items:center;gap:6px;color:#e8f0ff;font-size:15px;padding:10px 14px;border-radius:10px;cursor:pointer;font-weight:600}
.nav-link:hover,.dd-label:hover{background:rgba(255,255,255,.12);color:#fff}
.dd-label .arw{transition:transform .3s;font-size:11px}
.nav-item:hover .dd-label .arw{transform:rotate(180deg)}
.dropdown{position:absolute;top:calc(100% + 8px);left:0;min-width:210px;background:#fff;border-radius:14px;box-shadow:var(--shadow-h);padding:8px;opacity:0;visibility:hidden;transform:translateY(8px);transition:.25s}
.nav-item:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown li a{display:block;padding:9px 12px;border-radius:9px;color:#22304d;font-size:14.5px;white-space:nowrap}
.dropdown li a:hover{background:var(--bg);color:var(--brand)}
.dd-toggle,.nav-toggle,.node-radio,.sw-toggle,.conn-toggle{position:absolute;opacity:0;pointer-events:none}
.nav-cta{margin-left:6px}
.hamburger{display:none;margin-left:auto;width:44px;height:44px;border-radius:12px;background:rgba(255,255,255,.14);position:relative;cursor:pointer;border:0}
.hamburger span{position:absolute;left:12px;right:12px;height:2px;background:#fff;border-radius:2px;transition:.3s}
.hamburger span:nth-child(1){top:15px}
.hamburger span:nth-child(2){top:21px}
.hamburger span:nth-child(3){top:27px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:12px;font-weight:700;font-size:15.5px;cursor:pointer;border:0;transition:transform .22s,box-shadow .22s,background .22s;min-height:46px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px rgba(31,107,255,.34)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(31,107,255,.44)}
.btn-ghost{background:transparent;color:#fff;border:1.6px solid rgba(255,255,255,.6)}
.btn-ghost:hover{background:rgba(255,255,255,.14)}
.btn-line{background:#fff;color:var(--brand);border:1.6px solid var(--brand)}
.btn-line:hover{background:#eef4ff}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px;border-radius:10px}
.hero{position:relative;background:radial-gradient(1200px 600px at 78% 8%,#124b9e 0,rgba(18,75,158,0) 60%),linear-gradient(160deg,#081226 0,#0d2450 55%,#08203f 100%);color:#fff;padding:132px 0 84px;overflow:hidden}
.hero:after{content:"";position:absolute;inset:0;background:url('/images/hero-lines.svg') center/cover no-repeat;opacity:.5;pointer-events:none}
.hero .container{position:relative;z-index:2}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:52px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);color:#d7e8ff;font-size:13.5px;font-weight:600;padding:7px 15px;border-radius:999px;margin-bottom:20px}
.hero h1{font-size:clamp(30px,4.4vw,52px);letter-spacing:-.5px;margin-bottom:18px}
.hero h1 em{font-style:normal;background:linear-gradient(120deg,#6fd4ff,#b9e7ff);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:17.5px;color:#c3d6f2;max-width:560px}
.hero-actions{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 30px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:580px}
.stat{background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);border-radius:14px;padding:16px 18px}
.stat b{display:block;font-size:26px;font-weight:800;background:linear-gradient(120deg,#8fe0ff,#fff);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat span{font-size:13.5px;color:#aec6e6}
.demo{background:rgba(255,255,255,.075);border:1px solid rgba(255,255,255,.16);border-radius:22px;padding:22px;box-shadow:0 26px 60px rgba(0,0,0,.4)}
.demo-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px}
.demo-title{font-size:15px;font-weight:700;color:#eaf3ff;display:flex;align-items:center;gap:8px}
.dot{width:9px;height:9px;border-radius:50%;background:#38e08b;box-shadow:0 0 0 4px rgba(56,224,139,.18)}
.demo-state{font-size:13px;color:#9fc0e6}
.gauge{position:relative;width:190px;height:190px;margin:6px auto 14px;border-radius:50%;background:conic-gradient(from 210deg,#0a2a55 0 62%,#123a6d 62% 100%);display:grid;place-items:center;transition:.4s}
.gauge-ring{position:absolute;inset:12px;border-radius:50%;border:6px solid rgba(120,190,255,.22);border-top-color:#00d9ff;border-right-color:#1f6bff}
.needle{position:absolute;width:3px;height:66px;background:linear-gradient(#fff,#7fd0ff);border-radius:3px;bottom:50%;left:calc(50% - 1.5px);transform-origin:bottom center;transform:rotate(-118deg);transition:transform 1.1s cubic-bezier(.2,.9,.2,1)}
.conn-toggle:checked~.demo-stage .needle{transform:rotate(38deg)}
.gauge-val{position:relative;text-align:center;z-index:2}
.gauge-val b{font-size:32px;font-weight:800;color:#fff;display:block;line-height:1.1}
.gauge-val span{font-size:12.5px;color:#a9c6e8}
.conn-toggle:checked~.demo-stage .gauge{background:conic-gradient(from 210deg,#0d3f74 0 78%,#1f6bff 78% 100%)}
.demo-btns{display:flex;gap:10px;justify-content:center;margin:14px 0 16px}
.conn-btn,.node-btn,.sw-btn{display:inline-block;cursor:pointer;border-radius:11px;font-weight:700;text-align:center;transition:.25s;user-select:none}
.conn-btn{padding:12px 34px;min-height:46px;background:var(--grad);color:#fff;font-size:15.5px;box-shadow:0 10px 24px rgba(0,217,255,.28)}
.conn-btn .on{display:none}
.conn-toggle:checked~.demo-stage .conn-btn{background:linear-gradient(135deg,#17b26a,#0f9d58)}
.conn-toggle:checked~.demo-stage .conn-btn .on{display:inline}
.conn-toggle:checked~.demo-stage .conn-btn .off{display:none}
.on-v{display:none}
.conn-toggle:checked~.demo-stage .on-v{display:inline}
.conn-toggle:checked~.demo-stage .off-v{display:none}
.nodes-pick{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}
.node-btn{display:block;padding:9px 6px;font-size:13px;background:rgba(255,255,255,.09);border:1px solid rgba(255,255,255,.16);color:#d6e6fb}
.node-btn:hover{background:rgba(255,255,255,.18)}
.node-radio:checked+.node-btn{background:var(--grad);border-color:transparent;color:#fff;box-shadow:0 8px 18px rgba(31,107,255,.4)}
.demo-switches{display:grid;grid-template-columns:repeat(2,1fr);gap:10px;margin-top:14px}
.sw-btn{display:flex;align-items:center;justify-content:space-between;padding:10px 12px;font-size:13px;background:rgba(255,255,255,.07);border:1px solid rgba(255,255,255,.14);color:#cfe0f6}
.sw-btn i{width:34px;height:18px;border-radius:999px;background:rgba(255,255,255,.24);position:relative;transition:.25s}
.sw-btn i:after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:.25s}
.sw-toggle:checked+.sw-btn i{background:#17b26a}
.sw-toggle:checked+.sw-btn i:after{left:18px}
.readout{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:14px}
.readout div{background:rgba(255,255,255,.07);border-radius:11px;padding:10px;text-align:center;border:1px solid rgba(255,255,255,.12)}
.readout b{display:block;font-size:17px;color:#fff}
.readout span{font-size:11.5px;color:#a8c4e6}
main{display:block}
.section{padding:76px 0}
.section.alt{background:linear-gradient(180deg,#fff,#f0f6ff)}
.section-head{text-align:center;max-width:760px;margin:0 auto 46px}
.eyebrow{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1.4px;text-transform:uppercase;color:var(--brand);background:#e8f1ff;padding:6px 14px;border-radius:999px;margin-bottom:14px}
.section-head h2{font-size:clamp(23px,3vw,34px)}
.section-head p{color:var(--muted);font-size:16.5px}
.grid{display:grid;gap:22px}
.g3{grid-template-columns:repeat(3,1fr)}
.g4{grid-template-columns:repeat(4,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow);transition:transform .26s,box-shadow .26s,border-color .26s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h);border-color:#cfe0ff}
.fi{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;font-size:25px;background:#eaf2ff;margin-bottom:16px}
.center .fi{margin-left:auto;margin-right:auto}
.card h3{font-size:18.5px;margin-bottom:8px}
.card p{color:var(--muted);font-size:15px;margin:0}
.node-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:18px;display:flex;gap:14px;align-items:flex-start;box-shadow:var(--shadow);transition:.25s}
.node-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-h)}
.flag{width:42px;height:42px;border-radius:11px;background:#eaf2ff;display:grid;place-items:center;font-size:21px;flex:0 0 auto}
.node-card b{display:block;font-size:15.5px}
.node-card span{font-size:13px;color:var(--muted)}
.speed-wrap{display:grid;grid-template-columns:.95fr 1.05fr;gap:34px;align-items:center}
.bars{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:26px;box-shadow:var(--shadow)}
.bar-row{margin-bottom:18px}
.bar-row:last-child{margin-bottom:0}
.bar-top{display:flex;justify-content:space-between;font-size:14px;font-weight:600;margin-bottom:7px}
.bar-top span:last-child{color:var(--brand);font-weight:800}
.bar{height:10px;border-radius:999px;background:#e9f0fb;overflow:hidden}
.bar i{display:block;height:100%;border-radius:999px;background:var(--grad);width:0;transition:width 1s ease}
html.js .bar i{width:0}
.bar i.w1{width:96%}
.bar i.w2{width:88%}
.bar i.w3{width:92%}
.bar i.w4{width:99%}
.steps{counter-reset:st}
.step-card{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:30px 24px;box-shadow:var(--shadow);text-align:center}
.step-card:before{counter-increment:st;content:counter(st,decimal-leading-zero);position:absolute;top:-18px;left:50%;transform:translateX(-50%);width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;font-size:15px;box-shadow:0 8px 20px rgba(31,107,255,.34)}
.step-card h3{margin-top:16px;font-size:17.5px}
.step-card p{color:var(--muted);font-size:14.5px;margin:0}
.price-card{background:#fff;border:1px solid var(--line);border-radius:20px;padding:30px 26px;box-shadow:var(--shadow);position:relative;display:flex;flex-direction:column;transition:.26s}
.price-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h)}
.price-card.featured{border:2px solid var(--brand);box-shadow:0 22px 50px rgba(31,107,255,.22);background:linear-gradient(180deg,#fff,#f5faff)}
.tag{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12.5px;font-weight:700;padding:5px 16px;border-radius:999px;white-space:nowrap}
.price-card h3{font-size:19px}
.price{font-size:38px;font-weight:800;color:var(--ink);margin:6px 0 2px}
.price small{font-size:14px;font-weight:600;color:var(--muted)}
.price-card .btn{margin-top:auto}
.plist{margin:18px 0}
.plist li{position:relative;padding:7px 0 7px 26px;font-size:14.5px;color:#3c4a66;border-bottom:1px dashed #eef2fa}
.plist li:last-child{border-bottom:0}
.plist li:before{content:"✓";position:absolute;left:0;top:7px;color:#17b26a;font-weight:800}
.faq{max-width:880px;margin:0 auto}
.faq-item{background:#fff;border:1px solid var(--line);border-radius:14px;margin-bottom:12px;box-shadow:var(--shadow);overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:18px 56px 18px 22px;font-weight:700;font-size:16px;position:relative}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:after{content:"+";position:absolute;right:22px;top:50%;transform:translateY(-50%);font-size:22px;color:var(--brand);font-weight:400;transition:.25s}
.faq-item[open] summary:after{content:"−"}
.faq-item .ans{padding:0 22px 20px;color:var(--muted);font-size:15px}
.faq-item .ans ol{margin:8px 0 0;padding-left:20px;list-style:decimal}
.faq-item .ans ol li{margin-bottom:6px}
.review-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:var(--shadow);transition:.26s}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-h)}
.stars{color:#ffb020;font-size:15px;letter-spacing:2px;margin-bottom:10px}
.review-card p{font-size:15px;color:#33415c}
.who{display:flex;align-items:center;gap:12px;margin-top:14px}
.av{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;font-size:16px}
.who b{display:block;font-size:14.5px}
.who span{font-size:12.5px;color:var(--muted)}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);overflow:hidden;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.26s}
.news-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h)}
.news-card img{width:100%;aspect-ratio:16/9;object-fit:cover}
.news-body{padding:20px 20px 22px;display:flex;flex-direction:column;flex:1}
.news-tag{font-size:12px;font-weight:700;color:var(--brand);background:#e8f1ff;padding:4px 11px;border-radius:999px;align-self:flex-start;margin-bottom:10px}
.news-card h3{font-size:16.5px;line-height:1.45}
.news-card h3 a{color:var(--ink)}
.news-card h3 a:hover{color:var(--brand)}
.news-body time{font-size:13px;color:var(--muted);margin-top:auto;padding-top:12px}
.cta-band{background:radial-gradient(700px 340px at 20% 20%,#1b56ad 0,rgba(27,86,173,0) 70%),linear-gradient(135deg,#081a38,#0b2d5c);color:#fff;border-radius:24px;padding:54px 40px;text-align:center;box-shadow:0 26px 60px rgba(8,26,56,.34)}
.cta-band h2{font-size:clamp(22px,3vw,32px)}
.cta-band p{color:#bcd3ef;max-width:620px;margin:0 auto 26px}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.site-footer{background:var(--dark);color:#b7c8e0;padding:62px 0 26px;margin-top:80px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:34px}
.site-footer h4{color:#fff;font-size:15.5px;margin-bottom:16px}
.site-footer ul li a{color:#a9bcd8;font-size:14.5px;display:block;padding:5px 0}
.site-footer ul li a:hover{color:#fff}
.f-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:18px;margin-bottom:14px}
.f-brand img{width:32px;height:32px;border-radius:9px}
.f-about{font-size:14.5px;color:#9db2d1;max-width:320px}
.copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:22px;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;font-size:13.5px;color:#8ea5c6}
.copyright a{color:#b7c8e0}
.copyright a:hover{color:#fff}
.to-top{position:fixed;right:22px;bottom:22px;width:46px;height:46px;border-radius:13px;background:var(--grad);color:#fff;display:grid;place-items:center;font-size:20px;box-shadow:0 12px 28px rgba(31,107,255,.4);opacity:0;visibility:hidden;transition:.3s;z-index:90;border:0;cursor:pointer}
.to-top.show{opacity:1;visibility:visible}
.page-hero{background:linear-gradient(160deg,#081226,#0d2450);color:#fff;padding:118px 0 60px;text-align:center}
.page-hero h1{font-size:clamp(25px,3.6vw,40px)}
.page-hero p{color:#c3d6f2;max-width:680px;margin:0 auto}
.breadcrumb{font-size:13.5px;color:#a9c6e8;margin-bottom:14px}
.breadcrumb a{color:#cfe3ff}
.breadcrumb a:hover{color:#fff}
.breadcrumb span{opacity:.7;margin:0 6px}
.dl-hero{background:linear-gradient(160deg,#081226,#0e2b5c);color:#fff;padding:118px 0 70px}
.dl-hero .hero-grid{align-items:center}
.ver-badge{display:inline-block;font-size:13px;font-weight:700;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.24);padding:6px 14px;border-radius:999px;margin-bottom:16px;color:#d7e8ff}
.ver-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:28px 24px;box-shadow:var(--shadow);display:flex;flex-direction:column;transition:.26s}
.ver-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-h)}
.ver-card.featured{border:2px solid var(--brand);background:linear-gradient(180deg,#fff,#f5faff)}
.ver-card h3{font-size:18px;display:flex;align-items:center;gap:8px}
.ver-meta{display:flex;gap:16px;font-size:13.5px;color:var(--muted);margin:6px 0 14px}
.req-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.req{background:#fff;border:1px solid var(--line);border-radius:13px;padding:16px 18px;box-shadow:var(--shadow)}
.req b{display:block;font-size:12.5px;color:var(--muted);font-weight:600;letter-spacing:.4px;text-transform:uppercase}
.req span{font-size:15.5px;font-weight:700;color:var(--ink)}
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 322px;gap:40px;align-items:start}
.article-main{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:34px;box-shadow:var(--shadow);min-width:0}
.article-main h1{font-size:clamp(23px,3vw,32px)}
.article-meta{display:flex;flex-wrap:wrap;gap:16px;font-size:13.5px;color:var(--muted);border-bottom:1px solid var(--line);padding-bottom:18px;margin-bottom:22px}
.article-main h2{font-size:22px;margin-top:34px;scroll-margin-top:90px}
.article-main p{font-size:16px;color:#28364f}
.article-main .lead{font-size:17px;color:#33415c;background:#f5f9ff;border-left:4px solid var(--brand);padding:16px 18px;border-radius:0 12px 12px 0}
.article-main figure{margin:26px 0}
.article-main figure img{width:100%;border-radius:14px}
.article-main figcaption{font-size:13px;color:var(--muted);text-align:center;margin-top:8px}
.article-main blockquote{margin:22px 0;padding:16px 20px;background:#f3f8ff;border-radius:12px;border-left:4px solid var(--brand2);font-size:15.5px;color:#2b3a56}
.article-main blockquote b{color:var(--brand)}
.article-side{position:sticky;top:88px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:20px;box-shadow:var(--shadow);margin-bottom:20px}
.side-card h4{font-size:16px;position:relative;padding-left:13px;margin-bottom:14px}
.side-card h4:before{content:"";position:absolute;left:0;top:4px;bottom:4px;width:4px;border-radius:3px;background:var(--grad)}
.toc{position:relative;padding-left:6px}
.toc:before{content:"";position:absolute;left:9px;top:6px;bottom:6px;width:2px;background:#e7eefb}
.toc a{display:block;position:relative;padding:7px 0 7px 24px;font-size:14.5px;color:#41506e}
.toc a:before{content:"";position:absolute;left:4px;top:13px;width:11px;height:11px;border-radius:50%;background:#fff;border:2.5px solid #cfdcef}
.toc a:hover,.toc a.active{color:var(--brand);font-weight:700}
.toc a.active:before{border-color:var(--brand);background:var(--brand)}
.hot li a{display:flex;gap:10px;align-items:flex-start;padding:9px 0;font-size:14.5px;color:#33415c;border-bottom:1px dashed #eef2fa}
.hot li:last-child a{border-bottom:0}
.hot li a:hover{color:var(--brand)}
.rk{flex:0 0 auto;width:22px;height:22px;border-radius:7px;background:#e6ecf6;color:#67768f;display:grid;place-items:center;font-size:12.5px;font-weight:800;transition:.2s}
.hot li:nth-child(1) .rk{background:var(--grad);color:#fff}
.hot li:nth-child(2) .rk{background:linear-gradient(135deg,#ff9a3d,#ff6a00);color:#fff}
.hot li:nth-child(3) .rk{background:linear-gradient(135deg,#ffd453,#e8a600);color:#fff}
.hot li a:hover .rk{transform:scale(1.12)}
.tags{display:flex;flex-wrap:wrap;gap:9px}
.tags a{font-size:13px;color:#41506e;border:1px solid var(--line);border-radius:999px;padding:6px 13px;transition:.22s}
.tags a:hover{border-color:var(--brand);color:var(--brand);background:#f2f7ff}
.post-nav{display:grid;grid-template-columns:repeat(2,1fr);gap:16px;margin-top:34px}
.post-nav a{display:block;background:#f7faff;border:1px solid var(--line);border-radius:13px;padding:16px 18px;transition:.24s}
.post-nav a:hover{border-color:var(--brand);background:#eef5ff;transform:translateY(-3px)}
.post-nav small{display:block;font-size:12.5px;color:var(--muted);margin-bottom:4px}
.post-nav b{font-size:15px;color:var(--ink);font-weight:700;display:block;line-height:1.45}
.post-nav .next{text-align:right}
.related{margin-top:30px}
.comments{margin-top:34px;border-top:1px solid var(--line);padding-top:26px}
.comments h3{font-size:19px;margin-bottom:18px}
.comment{display:flex;gap:14px;padding:16px 0;border-bottom:1px dashed #eef2fa}
.comment:last-child{border-bottom:0}
.c-av{flex:0 0 auto;width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#2f7bff,#00cfe8);color:#fff;display:grid;place-items:center;font-weight:800}
.c-body b{font-size:14.5px;display:block}
.c-body time{font-size:12.5px;color:var(--muted)}
.c-body p{font-size:14.8px;color:#33415c;margin:6px 0 0}
.sitemap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.policy{background:#fff;border:1px solid var(--line);border-radius:var(--r);padding:34px;box-shadow:var(--shadow)}
.policy h2{font-size:20px;margin-top:28px}
.policy h2:first-of-type{margin-top:0}
.policy p,.policy li{color:#33415c;font-size:15.5px}
.policy ul{padding-left:20px;list-style:disc}
.policy ul li{margin-bottom:6px}
.note{background:#fff8ec;border:1px solid #ffe2b3;color:#8a5b00;border-radius:12px;padding:14px 18px;font-size:14.5px}
.center{text-align:center}
.mt24{margin-top:24px}
.mt40{margin-top:40px}
.err-wrap{min-height:72vh;display:grid;place-items:center;text-align:center;padding:120px 20px 60px}
.err-code{font-size:clamp(72px,16vw,150px);font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.reveal{opacity:1;transform:none}
html.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}
@media (max-width:992px){
.hero-grid,.speed-wrap{grid-template-columns:1fr;gap:34px}
.g3,.g4,.req-grid,.sitemap-grid{grid-template-columns:repeat(2,1fr)}
.article-wrap{grid-template-columns:1fr}
.article-side{position:static}
.footer-grid{grid-template-columns:1fr 1fr}
.nav-cta{display:none}
.hamburger{display:block}
.main-nav{position:absolute;top:68px;left:0;right:0;background:#0b1c38;flex-direction:column;align-items:stretch;gap:2px;padding:14px;box-shadow:0 18px 40px rgba(0,0,0,.4);max-height:0;overflow:hidden;transition:max-height .35s ease,padding .35s ease}
.nav-toggle:checked~.main-nav{max-height:640px}
.nav-item{position:static}
.dropdown{position:static;opacity:1;visibility:visible;transform:none;background:rgba(255,255,255,.06);box-shadow:none;padding:0;border-radius:12px;max-height:0;overflow:hidden;transition:max-height .3s ease}
.dd-toggle:checked~.dropdown{max-height:400px;margin:6px 0}
.dropdown li a{color:#cfe0f6}
.dropdown li a:hover{background:rgba(255,255,255,.12);color:#fff}
.nav-link,.dd-label{color:#e8f0ff}
}
@media (max-width:768px){
.section{padding:56px 0}
.hero{padding:110px 0 60px}
.g3,.g4,.g2,.req-grid,.sitemap-grid,.footer-grid,.post-nav{grid-template-columns:1fr}
.hero-stats,.nodes-pick,.readout,.demo-switches{grid-template-columns:repeat(2,1fr)}
.hero-stats{gap:12px}
.cta-band{padding:40px 22px}
.article-main{padding:24px}
.footer-grid{gap:26px}
}
@media (max-width:480px){
.container{padding:0 15px}
.hero{padding:100px 0 48px}
.hero-actions .btn{width:100%}
.hero-stats,.nodes-pick,.readout,.demo-switches{grid-template-columns:1fr}
.demo{padding:16px}
.gauge{width:165px;height:165px}
.price,.ver-card{padding:22px 18px}
.article-main{padding:20px}
.card{padding:20px}
.copyright{flex-direction:column;align-items:flex-start}
}