:root{
  --bg:#0b1020;
  --bg-2:#0e1424;
  --bg-3:#13233a;
  --line:#1f3b54;
  --text:#e8eef7;
  --muted:#9fb3c8;
  --cyan:#22d3ee;
  --cyan-d:#0ea5b7;
  --radius:14px;
  --maxw:1160px;
  --font:"Segoe UI",Roboto,Helvetica,Arial,"PingFang SC","Microsoft YaHei",sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--text);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.btn{display:inline-block;font-family:inherit;font-size:15px;font-weight:600;padding:13px 26px;border-radius:30px;cursor:pointer;border:1px solid transparent;transition:.2s;line-height:1;appearance:none;-webkit-appearance:none}
.btn-primary{background:var(--cyan);color:#06121a}
.btn-primary:hover{background:#5ee7f7;transform:translateY(-1px)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--cyan);color:var(--cyan)}
.btn-lg{padding:15px 34px;font-size:16px}
.text-cyan{color:var(--cyan)}
.bg-alt{background:var(--bg-2)}
.mt-24{margin-top:24px}.mt-40{margin-top:40px}.mt-64{margin-top:64px}
.mb-16{margin-bottom:16px}.mb-24{margin-bottom:24px}
.text-center{text-align:center}

/* header */
.site-header{position:sticky;top:0;z-index:50;background:rgba(11,16,32,.82);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;height:64px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.brand img{height:30px;width:auto}
.nav-links{display:flex;align-items:center;gap:26px;list-style:none}
.nav-links a{color:var(--muted);font-size:15px;transition:.2s}
.nav-links a:hover,.nav-links a.active{color:var(--text)}
.nav-cta{display:flex;align-items:center;gap:14px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:6px}
.burger span{width:24px;height:2px;background:var(--text);transition:.2s}

/* hero */
.hero{padding:78px 0 56px;position:relative;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.hero h1{font-size:46px;line-height:1.18;font-weight:800;letter-spacing:-.5px}
.hero h1 .hl{color:var(--cyan)}
.hero .lead{color:var(--muted);font-size:18px;margin:20px 0 14px}
.hero-stats{display:flex;gap:34px;margin:30px 0 32px;flex-wrap:wrap}
.hero-stats .num{font-size:30px;font-weight:800;color:var(--cyan)}
.hero-stats .lbl{font-size:13px;color:var(--muted)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-art{position:relative;display:flex;justify-content:center}
.hero-art img{width:min(420px,100%);filter:drop-shadow(0 20px 50px rgba(34,211,238,.18))}
.section{padding:74px 0}
.eyebrow{color:var(--cyan);font-weight:700;font-size:14px;letter-spacing:1px;text-transform:uppercase;margin-bottom:12px}
.h2{font-size:34px;font-weight:800;letter-spacing:-.4px;line-height:1.25}
.section .sub{color:var(--muted);font-size:17px;margin-top:14px;max-width:680px}

/* features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.feat{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:28px 24px;transition:.2s}
.feat:hover{border-color:var(--cyan);transform:translateY(-3px)}
.feat .ic{width:48px;height:48px;margin-bottom:16px}
.feat h3{font-size:19px;margin-bottom:8px}
.feat p{color:var(--muted);font-size:15px}

/* use-case */
.cases{display:grid;grid-template-columns:1fr 1fr;gap:22px;margin-top:44px}
.case{background:linear-gradient(135deg,var(--bg-2),var(--bg-3));border:1px solid var(--line);border-radius:var(--radius);padding:34px;display:flex;flex-direction:column;justify-content:space-between;min-height:200px}
.case h3{font-size:24px;margin-bottom:10px}
.case p{color:var(--muted);margin-bottom:20px}

/* qs */
.qs{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center}
.qs-art{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:18px}
.qs ul{list-style:none;margin-top:18px;display:grid;gap:12px}
.qs li{display:flex;gap:10px;align-items:flex-start;color:var(--muted)}
.qs li::before{content:"";flex:0 0 8px;height:8px;border-radius:50%;background:var(--cyan);margin-top:9px}

/* nodes band */
.nodes{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.nodes .nstat{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:34px;text-align:center}
.nodes .nstat .num{font-size:38px;font-weight:800;color:var(--cyan)}
.nodes .nstat .lbl{color:var(--muted)}

/* download cta */
.dl-cta{text-align:center;padding:90px 0}
.dl-cta h2{font-size:36px;font-weight:800}
.dl-cta p{color:var(--muted);font-size:18px;margin:16px 0 30px}

/* footer */
.site-footer{background:var(--bg-2);border-top:1px solid var(--line);padding:54px 0 30px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px}
.foot-brand img{height:30px;margin-bottom:14px}
.foot-brand p{color:var(--muted);font-size:14px;max-width:260px}
.foot-col h4{font-size:15px;margin-bottom:16px}
.foot-col a{display:block;color:var(--muted);font-size:14px;padding:5px 0;transition:.2s}
.foot-col a:hover{color:var(--cyan)}
.foot-bottom{border-top:1px solid var(--line);margin-top:36px;padding-top:20px;color:var(--muted);font-size:13px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px}

/* download page */
.dl-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.dl-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:30px 24px;text-align:center;transition:.2s}
.dl-card:hover{border-color:var(--cyan)}
.dl-card .os{font-size:20px;font-weight:700;margin:12px 0 6px}
.dl-card .meta{color:var(--muted);font-size:14px;margin-bottom:20px}

/* responsive */
@media(max-width:980px){
  .hero-grid{grid-template-columns:1fr;gap:30px}
  .hero h1{font-size:38px}
  .hero-art{order:-1}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .qs{grid-template-columns:1fr;gap:26px}
  .foot-grid{grid-template-columns:1fr 1fr}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{position:absolute;top:64px;left:0;right:0;background:var(--bg-2);flex-direction:column;gap:0;padding:8px 22px 16px;border-bottom:1px solid var(--line);display:none}
  .nav-links.open{display:flex}
  .nav-links li{width:100%;border-bottom:1px solid var(--line)}
  .nav-links li:last-child{border-bottom:0}
  .nav-links a{display:block;padding:12px 0}
  .burger{display:flex}
  .nav-cta .btn-ghost{display:none}
}
@media(max-width:640px){
  .hero h1{font-size:30px}
  .h2{font-size:27px}
  .feat-grid{grid-template-columns:1fr}
  .cases{grid-template-columns:1fr}
  .nodes .nstat{grid-template-columns:1fr;gap:24px}
  .dl-grid{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .hero-stats{gap:22px}
  .section{padding:54px 0}
}

/* blog */
.post-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px;margin-top:44px}
.post{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:26px 24px;transition:.2s}
.post:hover{border-color:var(--cyan)}
.post .date{color:var(--muted);font-size:13px;margin-bottom:8px}
.post h3{font-size:19px;margin-bottom:10px}
.post p{color:var(--muted);font-size:15px;margin-bottom:16px}
.post .more{color:var(--cyan);font-weight:600;font-size:14px}
.prose .date{color:var(--muted);font-size:13px;margin-bottom:8px}

/* status */
.status-list{display:grid;gap:12px;margin-top:34px;max-width:760px}
.status-row{display:flex;justify-content:space-between;align-items:center;background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:16px 20px}
.status-row .name{font-weight:600}
.badge{font-size:13px;font-weight:700;padding:4px 12px;border-radius:20px}
.badge.ok{color:#06121a;background:var(--cyan)}
.badge.warn{color:#06121a;background:#ffd24a}
.badge.down{color:#fff;background:#ff5a5a}

@media(max-width:980px){
  .post-grid{grid-template-columns:1fr}
}

/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.price-card{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:32px 26px;display:flex;flex-direction:column;transition:.2s}
.price-card:hover{border-color:var(--cyan)}
.price-card.featured{border-color:var(--cyan);box-shadow:0 0 0 1px var(--cyan)}
.price-card .name{font-size:14px;color:var(--muted);letter-spacing:1px;text-transform:uppercase}
.price-card .amount{font-size:42px;font-weight:800;margin:12px 0 2px}
.price-card .amount .unit{font-size:18px;font-weight:600}
.price-card .per{color:var(--muted);font-size:14px;margin-bottom:20px}
.price-card ul{list-style:none;display:grid;gap:11px;margin-bottom:22px;color:var(--muted);font-size:15px}
.price-card li{display:flex;gap:10px;align-items:flex-start}
.price-card li::before{content:"";flex:0 0 7px;height:7px;border-radius:50%;background:var(--cyan);margin-top:8px}
.price-card .btn{margin-top:auto;text-align:center}

/* tutorials steps */
.tut-steps{margin:14px 0 0;padding-left:20px;color:var(--muted);font-size:15px;display:grid;gap:8px}
.tut-steps li{margin-bottom:2px}

/* faq */
.faq{margin-top:36px;display:grid;gap:14px;max-width:840px}
.faq-item{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px}
.faq-q{font-size:17px;font-weight:700;margin-bottom:8px}
.faq-a{color:var(--muted);font-size:15px}

/* prose / article */
.prose{max-width:760px;margin:0 auto}
.prose h2{font-size:28px;margin:34px 0 14px}
.prose h3{font-size:20px;margin:24px 0 10px}
.prose p{color:var(--muted);margin-bottom:14px}
.prose ul{color:var(--muted);margin:0 0 14px 20px}
.prose li{margin-bottom:8px}

/* responsive additions */
@media(max-width:980px){
  .price-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:640px){
  .price-grid{grid-template-columns:1fr}
}

/* 下载确认弹窗 */
.dl-popup-overlay{position:fixed;inset:0;background:rgba(0,0,0,.45);display:flex;align-items:center;justify-content:center;z-index:200;opacity:0;visibility:hidden;transition:.2s;padding:1rem}
.dl-popup-overlay.active{opacity:1;visibility:visible}
.dl-popup{background:var(--bg-2);border:1px solid var(--line);border-radius:var(--radius);padding:2.2rem;max-width:380px;width:100%;text-align:center;transform:scale(.9) translateY(10px);transition:.2s;box-shadow:0 20px 60px rgba(0,0,0,.45)}
.dl-popup-overlay.active .dl-popup{transform:scale(1) translateY(0)}
.dl-popup-ic{width:52px;height:52px;background:var(--bg-3);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin:0 auto 1rem}
.dl-popup h3{font-size:1.15rem;font-weight:700;margin-bottom:.4rem}
.dl-popup p{font-size:.88rem;color:var(--muted);margin-bottom:1.3rem;line-height:1.7}
.dl-popup-btns{display:flex;gap:10px;justify-content:center}
.dl-popup-btns .btn{width:calc(50% - 5px)}