/* === Reset & Base === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{font-family:'Segoe UI',system-ui,-apple-system,sans-serif;background:#060b14;color:#dde6f0;line-height:1.7}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

/* === Variables === */
:root{
  --blue:#00c2ff;
  --blue2:#0098cc;
  --blue-glow:rgba(0,194,255,.3);
  --green:#00e5a0;
  --bg:#060b14;
  --bg2:#0b1220;
  --bg3:#101828;
  --bg4:#141e2e;
  --border:rgba(255,255,255,.07);
  --border-blue:rgba(0,194,255,.2);
  --text:#dde6f0;
  --muted:#6a7f99;
  --radius:12px;
}

/* === Layout === */
.container{max-width:1120px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-sm{padding:56px 0}

/* === Typography === */
.section-title{font-size:clamp(1.8rem,4vw,2.5rem);font-weight:700;text-align:center;margin-bottom:14px}
.section-sub{font-size:1rem;color:var(--muted);text-align:center;max-width:580px;margin:0 auto 52px}
.hl{color:var(--blue)}
.hl-g{color:var(--green)}

/* === Buttons === */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 30px;border-radius:8px;font-size:.97rem;font-weight:600;cursor:pointer;border:none;transition:all .2s}
.btn-primary{background:linear-gradient(135deg,var(--blue),#007bcc);color:#fff}
.btn-primary:hover{filter:brightness(1.1);transform:translateY(-2px);box-shadow:0 8px 28px var(--blue-glow)}
.btn-outline{background:transparent;color:#fff;border:1.5px solid var(--border-blue)}
.btn-outline:hover{border-color:var(--blue);color:var(--blue)}
.btn-green{background:linear-gradient(135deg,var(--green),#00b87a);color:#06120e}
.btn-green:hover{filter:brightness(1.1);transform:translateY(-2px)}
.btn-lg{padding:16px 44px;font-size:1.05rem;border-radius:10px}

/* === Nav === */
nav{position:sticky;top:0;z-index:100;background:rgba(6,11,20,.93);backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-size:1.15rem;font-weight:700}
.logo-mark{width:34px;height:34px;border-radius:8px;background:linear-gradient(135deg,var(--blue),#0055aa);display:flex;align-items:center;justify-content:center;font-size:.9rem;font-weight:900;color:#fff;letter-spacing:-.5px}
.nav-links{display:flex;align-items:center;gap:28px;font-size:.92rem}
.nav-links a{color:var(--muted);transition:color .2s}
.nav-links a:hover{color:#fff}
.nav-links a.active{color:var(--blue)}
.nav-cta{margin-left:12px}
.menu-toggle{display:none;background:none;border:none;cursor:pointer;padding:4px}
.menu-toggle span{display:block;width:22px;height:2px;background:#fff;margin:5px 0;transition:.3s}

/* === Hero === */
.hero{padding:96px 0 72px;position:relative;overflow:hidden}
.hero-bg{position:absolute;inset:0;pointer-events:none}
.hero-bg::before{content:'';position:absolute;top:-200px;left:50%;transform:translateX(-50%);width:900px;height:600px;background:radial-gradient(ellipse,rgba(0,194,255,.08) 0%,transparent 65%)}
.hero-bg::after{content:'';position:absolute;bottom:-100px;right:-100px;width:400px;height:400px;background:radial-gradient(ellipse,rgba(0,229,160,.05),transparent 60%)}
.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(0,194,255,.1);color:var(--blue);border:1px solid rgba(0,194,255,.2);border-radius:100px;padding:5px 14px;font-size:.82rem;font-weight:600;margin-bottom:22px}
.hero-badge .dot{width:7px;height:7px;background:var(--green);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-title{font-size:clamp(2rem,4.5vw,3.4rem);font-weight:800;line-height:1.2;margin-bottom:18px}
.hero-desc{font-size:1rem;color:var(--muted);margin-bottom:36px;max-width:480px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap}
.hero-visual{position:relative;display:flex;align-items:center;justify-content:center}
.hero-card{background:var(--bg3);border:1px solid var(--border-blue);border-radius:20px;padding:32px;width:100%;max-width:340px;position:relative}
.hero-card::before{content:'';position:absolute;inset:-1px;border-radius:21px;background:linear-gradient(135deg,rgba(0,194,255,.2),transparent 60%);z-index:-1}
.speed-ring{width:160px;height:160px;border-radius:50%;border:3px solid rgba(0,194,255,.15);display:flex;align-items:center;justify-content:center;margin:0 auto 24px;position:relative}
.speed-ring::before{content:'';position:absolute;inset:8px;border-radius:50%;border:3px solid rgba(0,194,255,.3);border-top-color:var(--blue);animation:spin 1.4s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
.speed-inner{text-align:center}
.speed-val{font-size:2.4rem;font-weight:800;color:#fff}
.speed-unit{font-size:.85rem;color:var(--muted)}
.speed-label{font-size:.82rem;color:var(--blue);margin-top:4px}
.card-stats{display:flex;justify-content:space-between;border-top:1px solid var(--border);padding-top:20px;margin-top:4px}
.cs-item{text-align:center}
.cs-num{font-size:1.1rem;font-weight:700;color:#fff}
.cs-label{font-size:.76rem;color:var(--muted);margin-top:2px}
.hero-trust{display:flex;align-items:center;gap:16px;margin-top:28px;flex-wrap:wrap}
.trust-item{display:flex;align-items:center;gap:6px;font-size:.83rem;color:var(--muted)}
.trust-icon{color:var(--green)}

/* === Features === */
.features{background:var(--bg2)}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:28px;position:relative;overflow:hidden;transition:all .25s}
.feat-card:hover{border-color:var(--border-blue);transform:translateY(-3px)}
.feat-card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,transparent,var(--blue),transparent);opacity:0;transition:opacity .25s}
.feat-card:hover::before{opacity:1}
.feat-icon{font-size:1.8rem;margin-bottom:16px}
.feat-title{font-size:1rem;font-weight:700;margin-bottom:8px;color:#fff}
.feat-desc{font-size:.88rem;color:var(--muted);line-height:1.75}

/* === How to use === */
.steps-wrap{display:grid;grid-template-columns:repeat(4,1fr);gap:0;position:relative}
.steps-wrap::before{content:'';position:absolute;top:30px;left:12%;right:12%;height:1px;background:linear-gradient(90deg,transparent,var(--border-blue),var(--border-blue),transparent);z-index:0}
.step-box{text-align:center;position:relative;z-index:1;padding:0 12px}
.step-num{width:60px;height:60px;border-radius:50%;background:var(--bg3);border:2px solid var(--border-blue);display:flex;align-items:center;justify-content:center;margin:0 auto 18px;font-size:1.3rem;font-weight:800;color:var(--blue)}
.step-title{font-size:.97rem;font-weight:700;margin-bottom:8px}
.step-desc{font-size:.86rem;color:var(--muted)}

/* === Nodes === */
.nodes{background:var(--bg2)}
.node-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:48px}
.node-card{background:var(--bg3);border:1px solid var(--border);border-radius:10px;padding:20px;display:flex;align-items:center;gap:14px;transition:border-color .2s}
.node-card:hover{border-color:var(--border-blue)}
.node-flag{font-size:1.8rem}
.node-name{font-weight:600;font-size:.95rem;margin-bottom:3px}
.node-ping{font-size:.8rem;color:var(--green)}
.node-status{width:8px;height:8px;background:var(--green);border-radius:50%;margin-left:auto;flex-shrink:0}

/* === Compare Table === */
.compare-wrap{overflow-x:auto}
.compare-table{width:100%;border-collapse:collapse;font-size:.9rem}
.compare-table th{background:var(--bg3);padding:14px 20px;text-align:left;font-weight:600;border-bottom:1px solid var(--border)}
.compare-table th:not(:first-child){text-align:center}
.compare-table td{padding:14px 20px;border-bottom:1px solid var(--border);color:var(--muted)}
.compare-table td:not(:first-child){text-align:center}
.compare-table tr:hover td{background:rgba(0,194,255,.03)}
.compare-table .hl-col{color:#fff;font-weight:600}
.compare-table .check{color:var(--green)}
.compare-table .cross{color:#555}
.compare-table .best{background:rgba(0,194,255,.06)}

/* === Reviews === */
.rev-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.rev-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:24px}
.rev-stars{color:#ffd700;letter-spacing:1px;font-size:.9rem;margin-bottom:12px}
.rev-text{font-size:.88rem;color:#bbc;line-height:1.8;margin-bottom:18px}
.rev-author{display:flex;align-items:center;gap:10px}
.rev-av{width:38px;height:38px;border-radius:50%;background:linear-gradient(135deg,rgba(0,194,255,.2),rgba(0,229,160,.1));display:flex;align-items:center;justify-content:center;font-weight:700;color:var(--blue);font-size:.85rem}
.rev-name{font-weight:600;font-size:.87rem}
.rev-info{font-size:.78rem;color:var(--muted)}

/* === FAQ === */
.faq-list{max-width:760px;margin:0 auto;display:flex;flex-direction:column;gap:10px}
.faq-item{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.faq-q{width:100%;background:none;border:none;color:#fff;text-align:left;padding:18px 22px;font-size:.95rem;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px}
.faq-q:hover{color:var(--blue)}
.faq-arrow{font-size:1rem;transition:transform .25s;flex-shrink:0;color:var(--muted)}
.faq-item.open .faq-arrow{transform:rotate(180deg);color:var(--blue)}
.faq-a{display:none;padding:0 22px 18px;font-size:.88rem;color:var(--muted);line-height:1.8}
.faq-a a{color:var(--blue)}
.faq-item.open .faq-a{display:block}

/* === CTA === */
.cta-wrap{background:linear-gradient(135deg,rgba(0,194,255,.1),rgba(0,229,160,.05));border:1px solid rgba(0,194,255,.15);border-radius:20px;padding:64px 40px;text-align:center}
.cta-title{font-size:clamp(1.6rem,3.5vw,2.2rem);font-weight:800;margin-bottom:14px}
.cta-sub{color:var(--muted);margin-bottom:34px}

/* === Page Hero === */
.page-hero{padding:72px 0 48px;text-align:center;border-bottom:1px solid var(--border)}
.page-hero h1{font-size:clamp(1.8rem,4vw,2.4rem);font-weight:800;margin-bottom:10px}
.page-hero p{color:var(--muted)}
.breadcrumb{display:flex;align-items:center;gap:8px;justify-content:center;font-size:.83rem;color:var(--muted);margin-bottom:18px}
.breadcrumb a:hover{color:var(--blue)}

/* === Download page === */
.dl-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:22px;margin-bottom:56px}
.dl-card{background:var(--bg3);border:1px solid var(--border);border-radius:var(--radius);padding:32px 24px;text-align:center;transition:border-color .2s}
.dl-card:hover{border-color:var(--border-blue)}
.dl-icon{font-size:2.6rem;margin-bottom:14px}
.dl-name{font-size:1.1rem;font-weight:700;margin-bottom:4px}
.dl-ver{font-size:.82rem;color:var(--muted);margin-bottom:22px}
.dl-btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;padding:12px;background:linear-gradient(135deg,var(--blue),#0078cc);color:#fff;border-radius:8px;font-weight:600;font-size:.9rem;transition:filter .2s}
.dl-btn:hover{filter:brightness(1.1)}
.dl-btn-alt{background:var(--bg4);border:1px solid var(--border);margin-top:8px;color:var(--muted)}
.dl-btn-alt:hover{border-color:var(--border-blue);color:#fff}

/* === Tutorial === */
.tut-content{max-width:820px;margin:0 auto}
.tut-sec{margin-bottom:52px}
.tut-sec h2{font-size:1.35rem;font-weight:700;margin-bottom:18px;padding-left:14px;border-left:3px solid var(--blue)}
.tut-sec h3{font-size:1.05rem;font-weight:600;margin:22px 0 8px}
.tut-sec p{font-size:.93rem;color:#bbc;line-height:1.8;margin-bottom:12px}
.tut-sec ol,.tut-sec ul{padding-left:18px;color:#bbc;font-size:.93rem;line-height:2}
.tip-box{background:rgba(0,194,255,.06);border:1px solid rgba(0,194,255,.18);border-radius:8px;padding:14px 18px;margin:18px 0;font-size:.88rem;color:#9dd4e8}
.tip-box strong{color:var(--blue)}

/* === Footer === */
footer{background:var(--bg2);border-top:1px solid var(--border);padding:52px 0 28px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px;margin-bottom:44px}
.footer-brand .logo{margin-bottom:12px}
.footer-brand p{font-size:.86rem;color:var(--muted);max-width:250px;line-height:1.7}
.footer-col h4{font-size:.88rem;font-weight:700;margin-bottom:14px;color:#fff}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px}
.footer-col ul li a{font-size:.84rem;color:var(--muted);transition:color .2s}
.footer-col ul li a:hover{color:var(--blue)}
.footer-bottom{border-top:1px solid var(--border);padding-top:24px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}
.footer-bottom p{font-size:.8rem;color:var(--muted)}
.footer-icp a{color:var(--muted);font-size:.8rem;transition:color .2s}
.footer-icp a:hover{color:#fff}

/* === Responsive === */
@media(max-width:1000px){
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .rev-grid{grid-template-columns:repeat(2,1fr)}
  .hero-grid{grid-template-columns:1fr}
  .hero-visual{display:none}
  .steps-wrap{grid-template-columns:repeat(2,1fr);gap:28px}
  .steps-wrap::before{display:none}
}
@media(max-width:720px){
  .footer-grid{grid-template-columns:1fr 1fr}
  .footer-brand{grid-column:1/-1}
  .feat-grid{grid-template-columns:1fr}
  .rev-grid{grid-template-columns:1fr}
  .steps-wrap{grid-template-columns:1fr}
}
@media(max-width:640px){
  .nav-links{display:none;position:fixed;inset:64px 0 0;background:var(--bg2);flex-direction:column;justify-content:start;padding:28px 22px;gap:22px;font-size:1rem}
  .nav-links.open{display:flex}
  .menu-toggle{display:block}
  .hero{padding:64px 0 48px}
  .section{padding:52px 0}
  .footer-grid{grid-template-columns:1fr}
  .footer-bottom{flex-direction:column;text-align:center}
  .cta-wrap{padding:40px 20px}
}