*{margin:0;padding:0;box-sizing:border-box}
:root{--brand:#ff6b2b;--brand2:#ffb020;--brand-soft:#fff1e8;--ink:#0b0e14;--ink2:#151b26;--txt:#1b2230;--muted:#5d6a7e;--line:#e6e9ef;--bg:#f6f7fa;--white:#fff;--mint:#12b886;--radius:16px;--shadow:0 10px 30px rgba(17,24,39,.07);--shadow-lg:0 24px 60px rgba(17,24,39,.13)}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--txt);background:var(--bg);line-height:1.7;overflow-x:hidden}
img{max-width:100%;display:block;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{list-style:none}
button,input,label{font-family:inherit}
.container{width:min(1180px,92%);margin:0 auto}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}
/* header */
.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(11,14,20,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid rgba(255,255,255,.07);transition:background .25s,box-shadow .25s}
.site-header.scrolled{background:rgba(11,14,20,.96);box-shadow:0 6px 24px rgba(0,0,0,.28)}
.nav{display:flex;align-items:center;justify-content:space-between;gap:20px;height:70px}
.brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:800;font-size:20px;letter-spacing:.5px}
.brand img{width:34px;height:34px;border-radius:9px}
.brand em{font-style:normal;color:var(--brand)}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu>li{position:relative}
.nav-menu>li>a{display:flex;align-items:center;gap:4px;color:#d5dbe6;font-size:15px;padding:10px 14px;border-radius:9px;transition:color .2s,background .2s}
.nav-menu>li>a:hover,.nav-menu>li>a:focus-visible{color:#fff;background:rgba(255,255,255,.07)}
.nav-menu .caret{font-size:10px;opacity:.7;transition:transform .25s}
.nav-menu li:hover .caret{transform:rotate(180deg)}
.sub{position:absolute;top:calc(100% + 8px);left:0;min-width:190px;background:#fff;border-radius:12px;box-shadow:0 18px 50px rgba(0,0,0,.2);padding:8px;opacity:0;visibility:hidden;transform:translateY(6px);transition:.2s}
.nav-menu li:hover .sub,.nav-menu li:focus-within .sub{opacity:1;visibility:visible;transform:translateY(0)}
.sub a{display:block;padding:9px 12px;border-radius:8px;font-size:14px;color:#2a3342}
.sub a:hover{background:var(--brand-soft);color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:12px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 24px;border-radius:10px;font-weight:700;font-size:15px;border:0;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s;min-height:44px}
.btn-primary{background:linear-gradient(100deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 8px 22px rgba(255,107,43,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 28px rgba(255,107,43,.42)}
.btn-ghost{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.4)}
.btn-ghost:hover{background:rgba(255,255,255,.1);border-color:#fff}
.btn-outline{background:#fff;color:var(--ink);border:1px solid var(--line);box-shadow:var(--shadow)}
.btn-outline:hover{border-color:var(--brand);color:var(--brand);transform:translateY(-2px)}
.btn-sm{padding:9px 18px;font-size:14px;min-height:40px}
.nav-download{padding:10px 20px;font-size:14px}
.menu-toggle{display:none}
.hamburger{display:none;width:44px;height:44px;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;border-radius:9px;border:1px solid rgba(255,255,255,.16)}
.hamburger span{display:block;width:20px;height:2px;background:#fff;transition:.25s}
/* hero */
.hero{position:relative;background:var(--ink);color:#fff;padding:140px 0 84px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:radial-gradient(760px 480px at 82% 18%,rgba(255,107,43,.3),transparent 62%),radial-gradient(600px 400px at 8% 8%,rgba(255,176,32,.15),transparent 60%);pointer-events:none}
.hero::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.045) 1px,transparent 1px);background-size:54px 54px;mask-image:radial-gradient(620px 420px at 50% 40%,#000,transparent);-webkit-mask-image:radial-gradient(620px 420px at 50% 40%,#000,transparent);pointer-events:none}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:99px;background:rgba(255,107,43,.14);border:1px solid rgba(255,107,43,.35);color:#ffc09b;font-size:13px;font-weight:600;margin-bottom:20px}
.eyebrow i{width:6px;height:6px;border-radius:50%;background:var(--brand2);box-shadow:0 0 0 4px rgba(255,176,32,.18)}
.hero h1{font-size:clamp(32px,4.4vw,58px);line-height:1.15;font-weight:900;letter-spacing:-.5px;margin-bottom:18px}
.hero h1 em{font-style:normal;background:linear-gradient(100deg,#ff8a4c,#ffc45c);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{font-size:clamp(15px,1.5vw,18px);color:#b9c2d0;max-width:560px;margin-bottom:28px}
.hero-btns{display:flex;flex-wrap:wrap;gap:14px;margin-bottom:34px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;max-width:520px}
.hero-stats div{border-top:1px solid rgba(255,255,255,.14);padding-top:12px}
.hero-stats b{display:block;font-size:clamp(22px,2.4vw,30px);font-weight:900;color:#fff;line-height:1.2}
.hero-stats b span{font-size:14px;font-weight:600;color:#ffb98f;margin-left:2px}
.hero-stats small{display:block;font-size:13px;color:#8d99ac;margin-top:2px}
/* demo */
.demo{background:linear-gradient(160deg,#1a2130,#10141d);border:1px solid rgba(255,255,255,.12);border-radius:22px;padding:18px;box-shadow:0 30px 80px rgba(0,0,0,.45);position:relative}
.demo-top{display:flex;align-items:center;justify-content:space-between;padding-bottom:14px;border-bottom:1px solid rgba(255,255,255,.09)}
.demo-top .dt{display:flex;align-items:center;gap:9px;font-size:14px;font-weight:700;color:#e9eef7}
.demo-top img{width:24px;height:24px;border-radius:6px}
.demo-top .pill{font-size:12px;padding:4px 10px;border-radius:99px;background:rgba(46,230,168,.14);color:#5cf0bd;font-weight:600}
.demo-power{position:absolute;opacity:0;pointer-events:none}
.gauge-wrap{display:flex;align-items:center;gap:18px;padding:18px 0 8px}
.gauge{position:relative;width:136px;height:136px;flex:0 0 auto}
.gauge svg{transform:rotate(-90deg);width:100%;height:100%}
.gauge .track{fill:none;stroke:rgba(255,255,255,.09);stroke-width:9}
.gauge .bar{fill:none;stroke:url(#gaugeGrad);stroke-width:9;stroke-linecap:round;stroke-dasharray:326;stroke-dashoffset:60;transition:stroke-dashoffset .8s ease}
.gauge .g-val{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;line-height:1.1}
.gauge .g-val strong{font-size:30px;font-weight:900;color:#fff}
.gauge .g-val span{font-size:11px;color:#8d99ac;letter-spacing:1px}
.metrics{flex:1;display:grid;grid-template-columns:1fr 1fr;gap:8px}
.metric{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.07);border-radius:10px;padding:8px 10px}
.metric small{display:block;color:#8d99ac;font-size:11px}
.metric b{font-size:15px;color:#e9eef7}
.metric b i{font-style:normal;font-size:10px;color:#8d99ac;margin-left:2px}
.nodes{display:flex;flex-direction:column;gap:7px;margin-top:6px}
.node{display:flex;align-items:center;gap:10px;padding:9px 11px;border-radius:10px;border:1px solid rgba(255,255,255,.08);background:rgba(255,255,255,.03);cursor:pointer;font-size:13px;color:#cfd7e4;transition:.2s}
.node input{position:absolute;opacity:0;pointer-events:none}
.node .flag{font-size:15px}
.node .nname{font-weight:600}
.node .nload{margin-left:auto;color:#8d99ac;font-size:12px}
.node .nbar{width:54px;height:4px;border-radius:3px;background:rgba(255,255,255,.12);overflow:hidden}
.node .nbar i{display:block;height:100%;background:linear-gradient(90deg,var(--brand),var(--brand2));border-radius:3px}
.node:has(input:checked),.node.on{border-color:rgba(255,107,43,.6);background:rgba(255,107,43,.12);color:#fff}
.toggles{display:flex;gap:8px;margin-top:12px}
.tg{flex:1;display:flex;align-items:center;justify-content:space-between;gap:8px;padding:8px 10px;border-radius:9px;background:rgba(255,255,255,.04);font-size:12px;color:#b9c2d0;cursor:pointer}
.tg input{position:absolute;opacity:0;pointer-events:none}
.tg .sw{width:32px;height:18px;border-radius:99px;background:rgba(255,255,255,.18);position:relative;transition:.2s;flex:0 0 auto}
.tg .sw::after{content:"";position:absolute;top:2px;left:2px;width:14px;height:14px;border-radius:50%;background:#fff;transition:.2s}
.tg input:checked+.sw{background:var(--brand)}
.tg input:checked+.sw::after{transform:translateX(14px)}
.demo-btn{display:block;text-align:center;margin-top:14px;padding:12px;border-radius:11px;font-weight:800;font-size:14px;color:#fff;background:linear-gradient(100deg,var(--brand),var(--brand2));cursor:pointer;box-shadow:0 10px 24px rgba(255,107,43,.3);transition:.2s}
.demo-btn:hover{filter:brightness(1.06)}
.demo-btn .when-on{display:none}
.demo-btn .when-off{display:inline}
#vpn-power:checked~.demo .demo-btn .when-on{display:inline}
#vpn-power:checked~.demo .demo-btn .when-off{display:none}
#vpn-power:checked~.demo .pill-idle{display:none}
#vpn-power:not(:checked)~.demo .pill-live{display:none}
#vpn-power:not(:checked)~.demo .bar{stroke-dashoffset:300!important}
#vpn-power:not(:checked)~.demo .g-val strong{color:#8d99ac}
/* generic sections */
.section{padding:84px 0}
.section-dark{background:var(--ink);color:#fff}
.section-white{background:#fff}
.s-head{text-align:center;max-width:760px;margin:0 auto 48px}
.s-head .tag{display:inline-block;font-size:13px;font-weight:800;letter-spacing:2px;color:var(--brand);margin-bottom:10px}
.s-head h2{font-size:clamp(26px,3.2vw,40px);line-height:1.25;font-weight:900;letter-spacing:-.4px}
.s-head p{margin-top:12px;color:var(--muted);font-size:16px}
.section-dark .s-head h2{color:#fff}
.section-dark .s-head p{color:#9aa6b8}
.s-head.left{text-align:left;margin-left:0}
.grid{display:grid;gap:22px}
.g4{grid-template-columns:repeat(4,1fr)}
.g3{grid-template-columns:repeat(3,1fr)}
.g2{grid-template-columns:repeat(2,1fr)}
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s,border-color .25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg);border-color:#ffd8c4}
.ico{width:48px;height:48px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:23px;background:linear-gradient(145deg,#fff0e6,#ffe0cc);margin-bottom:16px}
.card h3{font-size:18px;font-weight:800;margin-bottom:8px}
.card p{color:var(--muted);font-size:14.5px;line-height:1.75}
/* stats strip */
.stats{background:linear-gradient(100deg,#ff7a33,#ffb020);color:#fff;padding:30px 0}
.stats .grid{gap:16px}
.stat{text-align:center}
.stat b{display:block;font-size:clamp(24px,3vw,34px);font-weight:900;line-height:1.2}
.stat b span{font-size:15px;font-weight:700;margin-left:2px}
.stat small{font-size:13px;opacity:.9}
/* network */
.node-cards .card{padding:22px}
.node-cards .flag{font-size:26px;display:block;margin-bottom:8px}
.node-cards h3{display:flex;align-items:center;justify-content:space-between;font-size:16px}
.node-cards h3 span{font-size:12px;color:var(--mint);background:rgba(18,184,134,.1);padding:2px 8px;border-radius:99px;font-weight:700}
.node-cards .meta{font-size:13px;color:var(--muted);margin-top:6px}
.loadbar{height:6px;border-radius:5px;background:#eef1f6;margin-top:12px;overflow:hidden}
.loadbar i{display:block;height:100%;border-radius:5px;background:linear-gradient(90deg,var(--brand),var(--brand2))}
/* steps */
.steps{counter-reset:step}
.step{position:relative}
.step .num{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;font-weight:900;display:flex;align-items:center;justify-content:center;margin-bottom:14px;font-size:17px}
/* pricing */
.price-card{position:relative;display:flex;flex-direction:column}
.price-card.popular{border:2px solid var(--brand);box-shadow:0 24px 60px rgba(255,107,43,.18);transform:translateY(-6px)}
.price-card.popular:hover{transform:translateY(-10px)}
.pop-tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(100deg,var(--brand),var(--brand2));color:#fff;font-size:12px;font-weight:800;padding:4px 14px;border-radius:99px;white-space:nowrap}
.price-name{font-size:17px;font-weight:800;margin-bottom:6px}
.price-desc{font-size:13px;color:var(--muted);margin-bottom:16px}
.price{font-size:38px;font-weight:900;line-height:1;margin-bottom:4px}
.price small{font-size:14px;font-weight:600;color:var(--muted)}
.price-note{font-size:12px;color:var(--muted);margin-bottom:20px}
.price-card ul{display:flex;flex-direction:column;gap:10px;margin-bottom:24px;font-size:14px;color:#3a4557}
.price-card ul li{padding-left:22px;position:relative}
.price-card ul li::before{content:"✓";position:absolute;left:0;top:0;color:var(--brand);font-weight:900}
.price-card .btn{margin-top:auto;width:100%}
/* faq */
.faq{max-width:880px;margin:0 auto;display:flex;flex-direction:column;gap:12px}
.faq details{background:#fff;border:1px solid var(--line);border-radius:13px;padding:0 20px;box-shadow:0 4px 16px rgba(17,24,39,.04);transition:border-color .2s}
.faq details[open]{border-color:#ffd0b8;box-shadow:0 12px 30px rgba(255,107,43,.09)}
.faq summary{list-style:none;cursor:pointer;padding:17px 30px 17px 0;font-weight:700;font-size:15.5px;position:relative}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";position:absolute;right:0;top:50%;transform:translateY(-50%);font-size:22px;font-weight:400;color:var(--brand);line-height:1;transition:transform .2s}
.faq details[open] summary::after{content:"−"}
.faq .ans{padding:0 0 18px;color:var(--muted);font-size:14.5px;line-height:1.8}
.faq .ans ol{margin-top:8px;padding-left:4px;display:flex;flex-direction:column;gap:4px}
.faq .ans ol li{counter-increment:qstep}
/* testimonials */
.quote{display:flex;flex-direction:column;gap:14px}
.stars{color:var(--brand2);letter-spacing:2px;font-size:15px}
.quote p{font-size:14.5px;color:#3a4557;flex:1}
.who{display:flex;align-items:center;gap:11px}
.avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#ffd9c2,#ffb98f);color:#8a3b12;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:16px}
.who b{display:block;font-size:14px}
.who small{color:var(--muted);font-size:12px}
/* news cards */
.news-card{padding:0;overflow:hidden;display:flex;flex-direction:column}
.news-card img{width:100%;aspect-ratio:16/9;object-fit:cover;transition:transform .4s}
.news-card:hover img{transform:scale(1.04)}
.news-body{padding:20px 22px 24px;display:flex;flex-direction:column;flex:1}
.news-meta{display:flex;align-items:center;gap:10px;font-size:12px;color:var(--muted);margin-bottom:10px}
.news-meta .cat{color:var(--brand);background:var(--brand-soft);padding:2px 9px;border-radius:99px;font-weight:700}
.news-card h3{font-size:17px;line-height:1.5;margin-bottom:8px}
.news-card h3 a:hover{color:var(--brand)}
.news-card p{font-size:13.5px;color:var(--muted);flex:1}
.more{display:inline-flex;align-items:center;gap:6px;color:var(--brand);font-weight:700;font-size:13.5px;margin-top:14px}
/* cta */
.cta{position:relative;background:linear-gradient(110deg,#101520,#1c2433);color:#fff;border-radius:24px;padding:56px 48px;overflow:hidden;display:grid;grid-template-columns:1.3fr .7fr;align-items:center;gap:30px}
.cta::before{content:"";position:absolute;right:-80px;top:-80px;width:340px;height:340px;border-radius:50%;background:radial-gradient(circle,rgba(255,107,43,.45),transparent 65%)}
.cta h2{font-size:clamp(24px,3vw,36px);font-weight:900;line-height:1.3;margin-bottom:10px}
.cta p{color:#aab5c6;font-size:15px;margin-bottom:22px}
.cta .hero-btns{margin-bottom:0}
.cta-right{position:relative;text-align:center;font-size:72px;line-height:1}
/* footer */
.footer{background:#080b11;color:#9aa6b8;padding:60px 0 26px;font-size:14px}
.f-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:36px;padding-bottom:40px;border-bottom:1px solid rgba(255,255,255,.08)}
.f-brand .brand{margin-bottom:14px}
.f-brand p{font-size:13.5px;max-width:300px;line-height:1.8}
.f-col h4{color:#fff;font-size:14px;margin-bottom:14px;font-weight:700}
.f-col a{display:block;padding:5px 0;color:#9aa6b8;font-size:13.5px}
.f-col a:hover{color:var(--brand2)}
.f-bottom{display:flex;align-items:center;justify-content:space-between;gap:16px;padding-top:22px;font-size:12.5px;color:#6f7c90;flex-wrap:wrap}
.f-bottom .f-links{display:flex;gap:16px;flex-wrap:wrap}
.backtop{position:fixed;right:22px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--ink);color:#fff;display:flex;align-items:center;justify-content:center;box-shadow:0 10px 26px rgba(0,0,0,.25);z-index:90;font-size:18px}
.backtop:hover{background:var(--brand)}
.section-dark .card{background:#141a24;border-color:#232c3b;box-shadow:none}
.section-dark .card:hover{border-color:#3a4658;box-shadow:0 18px 40px rgba(0,0,0,.4)}
.section-dark .card h3{color:#fff}
.section-dark .card p{color:#98a4b7}
.section-dark .loadbar{background:rgba(255,255,255,.1)}
.section-dark .node-cards .meta{color:#8f9bad}
.menu-toggle{position:absolute;opacity:0;pointer-events:none}
.menu-toggle:checked~.hamburger span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.menu-toggle:checked~.hamburger span:nth-child(2){opacity:0}
.menu-toggle:checked~.hamburger span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* page head */
.page-hero{background:var(--ink);color:#fff;padding:120px 0 56px;position:relative;overflow:hidden}
.page-hero::before{content:"";position:absolute;inset:0;background:radial-gradient(600px 300px at 80% 0,rgba(255,107,43,.25),transparent 60%);pointer-events:none}
.page-hero h1{font-size:clamp(28px,3.8vw,44px);font-weight:900;letter-spacing:-.4px;position:relative}
.page-hero p{color:#aab5c6;margin-top:12px;max-width:720px;position:relative}
.crumb{display:flex;align-items:center;gap:8px;font-size:13px;color:#8b97aa;margin-bottom:16px;flex-wrap:wrap;position:relative}
.crumb a:hover{color:var(--brand2)}
/* article */
.article-wrap{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:36px;align-items:start}
.article{background:#fff;border:1px solid var(--line);border-radius:20px;padding:40px;box-shadow:var(--shadow);min-width:0}
.article h1{font-size:clamp(25px,3vw,34px);line-height:1.35;font-weight:900;margin-bottom:14px;letter-spacing:-.3px}
.article .a-meta{display:flex;flex-wrap:wrap;gap:14px;align-items:center;font-size:13px;color:var(--muted);padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:24px}
.article .a-meta .cat{color:var(--brand);background:var(--brand-soft);padding:2px 10px;border-radius:99px;font-weight:700}
.article .cover{width:100%;border-radius:14px;margin:4px 0 24px}
.article p{font-size:15.5px;line-height:1.9;color:#354052;margin-bottom:18px}
.article h2{font-size:22px;font-weight:800;margin:34px 0 14px;scroll-margin-top:96px;padding-left:12px;border-left:4px solid var(--brand)}
.article .lead-p{font-size:16px;color:#26303f;background:#fdf6f1;border-left:4px solid var(--brand2);padding:16px 20px;border-radius:0 10px 10px 0}
.article figure{margin:24px 0}
.article figure img{border-radius:14px;width:100%}
.article figcaption{font-size:12.5px;color:var(--muted);margin-top:8px;text-align:center}
.article blockquote{margin:22px 0;padding:18px 22px;background:#f7f8fb;border-left:4px solid var(--brand);border-radius:0 12px 12px 0;font-size:15px;color:#2c3646}
.article blockquote b{color:var(--ink);display:block;margin-top:8px;font-size:13.5px}
.article .data-box{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin:24px 0}
.data-box div{background:#f7f8fb;border:1px solid var(--line);border-radius:12px;padding:14px;text-align:center}
.data-box b{display:block;font-size:22px;font-weight:900;color:var(--brand)}
.data-box small{font-size:12px;color:var(--muted)}
.article ul.dot{margin:0 0 18px;display:flex;flex-direction:column;gap:8px}
.article ul.dot li{position:relative;padding-left:20px;font-size:15px;color:#354052}
.article ul.dot li::before{content:"";position:absolute;left:2px;top:11px;width:6px;height:6px;border-radius:50%;background:var(--brand)}
.tags{display:flex;flex-wrap:wrap;gap:8px;margin:28px 0 6px}
.tags a{font-size:12.5px;padding:5px 12px;border-radius:99px;background:#f2f4f8;color:#4a5668;border:1px solid transparent}
.tags a:hover{color:var(--brand);border-color:var(--brand);background:#fff}
.a-nav{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:22px}
.a-nav a{background:#f7f8fb;border:1px solid var(--line);border-radius:12px;padding:14px;font-size:13.5px;transition:.2s}
.a-nav a:hover{border-color:var(--brand);background:#fff;color:var(--brand)}
.a-nav span{display:block;font-size:11.5px;color:var(--muted);margin-bottom:4px}
.a-nav .next{text-align:right}
.back-list{display:inline-flex;margin-top:18px;font-size:13.5px;color:var(--brand);font-weight:700}
.related{margin-top:30px}
.related h3{font-size:18px;margin-bottom:14px}
.related .grid{gap:14px}
.rel-card{display:block;background:#f7f8fb;border:1px solid var(--line);border-radius:12px;padding:12px}
.rel-card:hover{border-color:var(--brand)}
.rel-card img{border-radius:8px;aspect-ratio:16/9;object-fit:cover;margin-bottom:8px}
.rel-card b{font-size:13px;line-height:1.5;display:block;font-weight:700}
.rel-card small{font-size:11px;color:var(--muted)}
.comments{margin-top:34px;border-top:1px solid var(--line);padding-top:24px}
.comments h3{font-size:18px;margin-bottom:16px}
.cmt{display:flex;gap:12px;padding:14px 0;border-bottom:1px dashed var(--line)}
.cmt:last-child{border-bottom:0}
.cmt .c-body b{font-size:14px}
.cmt .c-body time{font-size:12px;color:var(--muted);margin-left:8px}
.cmt .c-body p{font-size:14px;margin:4px 0 0;color:#4a5668;line-height:1.75}
/* sidebar */
.sidebar{position:sticky;top:92px;display:flex;flex-direction:column;gap:18px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow)}
.side-card h4{font-size:15px;font-weight:800;padding-left:11px;position:relative;margin-bottom:16px}
.side-card h4::before{content:"";position:absolute;left:0;top:3px;bottom:3px;width:3px;border-radius:2px;background:linear-gradient(var(--brand),var(--brand2))}
.toc{position:relative;padding-left:16px;border-left:1px solid #e3e7ee;display:flex;flex-direction:column;gap:12px}
.toc a{position:relative;font-size:13.5px;color:#5d6a7e;line-height:1.5}
.toc a::before{content:"";position:absolute;left:-21px;top:7px;width:9px;height:9px;border-radius:50%;background:#dcdfe6;box-shadow:0 0 0 3px #fff}
.toc a:hover,.toc a.active{color:var(--brand);font-weight:700}
.toc a.active::before{background:var(--brand)}
.hot{display:flex;flex-direction:column;gap:11px}
.hot a{display:flex;gap:10px;font-size:13.5px;line-height:1.5;color:#3a4557}
.hot a:hover{color:var(--brand)}
.hot .badge{width:21px;height:21px;flex:0 0 auto;border-radius:6px;background:#e9edf3;color:#7c8798;display:flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;transition:transform .2s}
.hot a:nth-child(1) .badge{background:linear-gradient(135deg,var(--brand),#ff8a4c);color:#fff}
.hot a:nth-child(2) .badge{background:linear-gradient(135deg,#ffb020,#ffcf5c);color:#fff}
.hot a:nth-child(3) .badge{background:linear-gradient(135deg,#d9a33a,#f0c96a);color:#fff}
.hot a:hover .badge{transform:scale(1.12)}
.cat-tags{display:flex;flex-wrap:wrap;gap:8px}
.cat-tags a{font-size:12px;padding:5px 11px;border-radius:99px;background:#f3f5f9;color:#5d6a7e;border:1px solid transparent}
.cat-tags a:hover{color:var(--brand);border-color:var(--brand);background:#fff}
/* download page */
.dl-hero{padding:120px 0 60px}
.dl-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center}
.dl-hero h1{font-size:clamp(30px,4vw,50px);font-weight:900;line-height:1.18}
.dl-hero h1 em{font-style:normal;color:var(--brand2)}
.dl-data{display:flex;gap:26px;flex-wrap:wrap;margin:26px 0}
.dl-data div b{display:block;font-size:20px;font-weight:900;color:#fff}
.dl-data div small{font-size:12.5px;color:#8d99ac}
.ver-card{display:flex;flex-direction:column;gap:10px}
.ver-card .vtop{display:flex;align-items:center;justify-content:space-between;gap:12px}
.ver-card .vtop b{font-size:19px}
.ver-card .vtop span{font-size:12px;background:#eef8f4;color:var(--mint);padding:3px 9px;border-radius:99px;font-weight:700}
.ver-card .vmeta{font-size:13px;color:var(--muted)}
.ver-card ul{flex:1}
.os-grid .card{padding:22px}
.os-grid .ico{font-size:26px}
.req{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.req div{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;box-shadow:0 4px 14px rgba(17,24,39,.04)}
.req b{display:block;font-size:13px;color:var(--muted);font-weight:600;margin-bottom:3px}
.req span{font-size:14.5px;font-weight:700}
/* misc */
.notice{background:#fff8f2;border:1px solid #ffddc8;border-radius:12px;padding:14px 18px;font-size:13.5px;color:#8a4a24;margin:18px 0}
.policy{max-width:860px;margin:0 auto;background:#fff;border:1px solid var(--line);border-radius:20px;padding:40px;box-shadow:var(--shadow)}
.policy h1{font-size:30px;margin-bottom:8px}
.policy .upd{font-size:13px;color:var(--muted);margin-bottom:24px}
.policy h2{font-size:19px;margin:26px 0 10px;padding-left:11px;border-left:3px solid var(--brand)}
.policy p,.policy li{font-size:14.5px;color:#3e4959;margin-bottom:10px;line-height:1.85}
.policy ul{padding-left:4px}
.policy ul li{padding-left:18px;position:relative}
.policy ul li::before{content:"";position:absolute;left:0;top:10px;width:5px;height:5px;border-radius:50%;background:var(--brand)}
.map-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.map-grid .card h3{margin-bottom:12px}
.map-grid .card a{display:block;font-size:14px;color:#4a5668;padding:4px 0}
.map-grid .card a:hover{color:var(--brand)}
.err{text-align:center;padding:130px 0 80px}
.err .code{font-size:clamp(80px,16vw,150px);font-weight:900;line-height:1;background:linear-gradient(100deg,var(--brand),var(--brand2));-webkit-background-clip:text;background-clip:text;color:transparent}
.err h1{font-size:26px;margin:10px 0 8px}
.err p{color:var(--muted);margin-bottom:24px}
.err .count{color:var(--brand);font-weight:800}
/* reveal */
html.js .reveal{opacity:0;transform:translateY(22px);transition:opacity .6s ease,transform .6s ease}
html.js .reveal.in{opacity:1;transform:none}
html:not(.js) .reveal{opacity:1;transform:none}
/* responsive */
@media(max-width:992px){
.nav-menu{display:none}
.hamburger{display:flex}
.nav-download{display:none}
.nav-menu.open,.menu-toggle:checked~.nav-menu{display:flex;position:fixed;top:70px;left:0;right:0;background:#0b0e14;flex-direction:column;align-items:stretch;gap:2px;padding:14px 5%;max-height:calc(100vh - 70px);overflow:auto;border-bottom:1px solid rgba(255,255,255,.1)}
.nav-menu.open>li>a,.menu-toggle:checked~.nav-menu>li>a{padding:13px 10px;font-size:16px;justify-content:space-between}
.nav-menu.open .sub,.menu-toggle:checked~.nav-menu .sub{position:static;opacity:1;visibility:visible;transform:none;box-shadow:none;background:rgba(255,255,255,.05);display:block;padding:4px;margin-bottom:6px}
.nav-menu.open .sub a,.menu-toggle:checked~.nav-menu .sub a{color:#c3ccda}
.nav-menu.open .sub a:hover,.menu-toggle:checked~.nav-menu .sub a:hover{background:rgba(255,255,255,.08);color:#fff}
.hero{padding:116px 0 64px}
.hero-grid,.dl-grid{grid-template-columns:1fr;gap:38px}
.hero-stats{max-width:none}
.demo{max-width:520px;margin:0 auto;width:100%}
.article-wrap{grid-template-columns:1fr}
.sidebar{position:static}
.g4{grid-template-columns:repeat(2,1fr)}
.g3{grid-template-columns:repeat(2,1fr)}
.f-grid{grid-template-columns:1.4fr 1fr 1fr;gap:28px}
.f-brand{grid-column:1/-1}
.req{grid-template-columns:repeat(2,1fr)}
.map-grid{grid-template-columns:repeat(2,1fr)}
.cta{grid-template-columns:1fr;padding:40px 30px;text-align:left}
.cta-right{display:none}
.section{padding:64px 0}
.article{padding:28px}
}
@media(max-width:768px){
.g4,.g3,.g2,.hero-stats,.req,.map-grid{grid-template-columns:1fr}
.hero h1{font-size:32px}
.hero-btns .btn{flex:1;min-width:150px}
.s-head{margin-bottom:32px}
.card{padding:22px}
.article{padding:22px;border-radius:14px}
.article .data-box{grid-template-columns:1fr}
.a-nav{grid-template-columns:1fr}
.a-nav .next{text-align:left}
.related .grid{grid-template-columns:1fr}
.f-grid{grid-template-columns:1fr 1fr}
.f-brand{grid-column:1/-1}
.nav{height:64px}
.nav-menu.open,.menu-toggle:checked~.nav-menu{top:64px;max-height:calc(100vh - 64px)}
.page-hero,.dl-hero{padding-top:100px}
.price-card.popular{transform:none}
.policy{padding:24px}
.faq summary{font-size:14.5px}
.stats .grid{grid-template-columns:1fr 1fr}
.gauge{width:118px;height:118px}
.gauge .g-val strong{font-size:26px}
}
@media(max-width:480px){
.container{width:94%}
.brand{font-size:18px}
.brand img{width:30px;height:30px}
.hero{padding:100px 0 50px}
.hero h1{font-size:27px}
.hero p.lead{font-size:14.5px}
.demo{padding:14px}
.gauge-wrap{gap:10px}
.metrics{gap:6px}
.metric{padding:6px 8px}
.metric b{font-size:13px}
.node{padding:8px;font-size:12px}
.node .nbar{width:36px}
.toggles{flex-direction:column}
.hero-stats{grid-template-columns:1fr 1fr}
.cta{padding:32px 20px}
.f-grid{grid-template-columns:1fr}
.f-bottom{flex-direction:column;align-items:flex-start}
.article h1{font-size:23px}
.backtop{right:14px;bottom:16px}
}
@media(prefers-reduced-motion:reduce){
*,*::before,*::after{animation:none!important;transition:none!important}
html{scroll-behavior:auto}
}