:root{--brand:#ff8a00;--brand2:#ffb300;--grad:linear-gradient(135deg,#ff6a00,#ffb300);--dark:#0b1220;--dark2:#101a2e;--ink:#1e293b;--mut:#64748b;--line:#e5e9f0;--bg:#f7f9fc;--card:#fff;--shadow:0 10px 40px rgba(15,23,42,.08);--radius:18px}
*{margin:0;padding:0;box-sizing:border-box}
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(--ink);background:var(--bg);line-height:1.7;font-size:16px}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:84px 0}
.sec-tag{display:inline-block;font-size:13px;font-weight:700;letter-spacing:1px;color:var(--brand);background:rgba(255,138,0,.1);padding:6px 14px;border-radius:999px;margin-bottom:14px}
.sec-title{font-size:38px;font-weight:800;line-height:1.25;color:var(--dark);margin-bottom:14px}
.sec-sub{color:var(--mut);font-size:17px;max-width:640px}
.center{text-align:center}
.center .sec-sub{margin:0 auto}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;font-weight:700;font-size:16px;border-radius:12px;padding:14px 30px;cursor:pointer;border:none;transition:.25s;white-space:nowrap}
.btn-grad{background:var(--grad);color:#fff;box-shadow:0 8px 24px rgba(255,138,0,.35)}
.btn-grad:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(255,138,0,.45)}
.btn-ghost{background:transparent;color:var(--ink);border:1.5px solid var(--line)}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:16px 40px;font-size:17px;border-radius:14px}
.btn-sm{padding:10px 20px;font-size:14px}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:999;padding:16px 0;transition:.35s;background:transparent}
.nav.scrolled{background:rgba(11,18,32,.92);backdrop-filter:blur(14px);padding:10px 0;box-shadow:0 4px 24px rgba(0,0,0,.25)}
.nav .container{display:flex;align-items:center;justify-content:space-between;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-size:22px;font-weight:800;color:#fff}
.brand img{height:36px;width:36px;border-radius:8px}
.brand span{color:#fff}
.nav-menu{display:flex;align-items:center;gap:6px}
.nav-menu>li{position:relative}
.nav-menu>li>a{display:flex;align-items:center;gap:5px;padding:9px 15px;color:#e2e8f0;font-weight:600;font-size:15px;border-radius:8px;transition:.2s}
.nav-menu>li>a:hover{color:#fff;background:rgba(255,255,255,.08)}
.nav-menu>li>a .caret{transition:.25s;font-size:10px}
.nav-menu>li:hover>a .caret{transform:rotate(180deg)}
.dropdown{position:absolute;top:110%;left:0;min-width:210px;background:#fff;border-radius:14px;box-shadow:0 16px 48px rgba(15,23,42,.16);padding:8px;opacity:0;visibility:hidden;transform:translateY(10px);transition:.25s}
.nav-menu>li:hover .dropdown{opacity:1;visibility:visible;transform:translateY(0)}
.dropdown a{display:block;padding:10px 14px;border-radius:9px;color:var(--ink);font-size:14px;font-weight:500}
.dropdown a:hover{background:#f1f5f9;color:var(--brand)}
.nav-actions{display:flex;align-items:center;gap:10px}
.nav-actions .btn{padding:9px 20px;font-size:14px}
.burger{display:none;background:none;border:none;width:40px;height:40px;cursor:pointer;flex-direction:column;justify-content:center;gap:5px}
.burger span{display:block;height:2.5px;width:24px;background:#fff;border-radius:2px;transition:.3s}
.burger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* ===== Hero ===== */
.hero{position:relative;background:radial-gradient(1000px 600px at 80% -10%,rgba(255,138,0,.25),transparent 60%),linear-gradient(160deg,#0b1220,#101a2e 55%,#16233f);color:#fff;padding:150px 0 100px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.03) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.03) 1px,transparent 1px);background-size:44px 44px}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center;position:relative;z-index:1}
.hero h1{font-size:52px;font-weight:800;line-height:1.18;margin-bottom:20px}
.hero h1 .hl{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:19px;color:#cbd5e1;margin-bottom:30px;max-width:540px}
.hero-btns{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:40px}
.hero-stats{display:flex;gap:40px;flex-wrap:wrap}
.stat .num{font-size:34px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{font-size:13px;color:#94a3b8;margin-top:2px}

/* ===== 产品演示器 ===== */
.demo{background:linear-gradient(160deg,#1a2740,#0e1729);border:1px solid rgba(255,255,255,.08);border-radius:22px;padding:26px;box-shadow:0 30px 80px rgba(0,0,0,.4);position:relative}
.demo-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:22px}
.demo-title{display:flex;align-items:center;gap:10px;font-weight:700;font-size:15px}
.demo-dots{display:flex;gap:6px}
.demo-dots i{width:10px;height:10px;border-radius:50%;display:block}
.demo-dots i:nth-child(1){background:#ff5f57}
.demo-dots i:nth-child(2){background:#febc2e}
.demo-dots i:nth-child(3){background:#28c840}
.gauge-wrap{display:flex;justify-content:center;margin-bottom:20px}
.gauge{position:relative;width:220px;height:220px}
.gauge svg{transform:rotate(-90deg)}
.gauge .track{stroke:rgba(255,255,255,.1)}
.gauge .bar{stroke:url(#gbar);stroke-linecap:round;transition:stroke-dashoffset 1s ease}
.gauge-center{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.gauge-center .spd{font-size:44px;font-weight:800}
.gauge-center .unit{font-size:13px;color:#94a3b8}
.demo-metrics{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-bottom:20px}
.metric{background:rgba(255,255,255,.05);border-radius:12px;padding:14px;text-align:center}
.metric .k{font-size:12px;color:#94a3b8}
.metric .v{font-size:20px;font-weight:700;margin-top:4px}
.metric .v .good{color:#34d399}
.demo-controls{display:flex;gap:10px;flex-wrap:wrap}
.demo-controls select,.demo-controls button{flex:1;min-width:120px;padding:12px;border-radius:10px;border:none;font-size:14px;font-weight:600;cursor:pointer}
.demo-controls select{background:#233150;color:#e2e8f0}
.demo-controls .connect{background:var(--grad);color:#fff}
.demo-controls .toggle{background:#233150;color:#e2e8f0}
.demo-controls .toggle.on{background:#0f766e;color:#fff}

/* ===== 功能卡片 ===== */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--line);transition:.3s}
.card:hover{transform:translateY(-5px);box-shadow:0 18px 50px rgba(15,23,42,.12)}
.card .ic{width:54px;height:54px;border-radius:14px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:18px;background:rgba(255,138,0,.12)}
.card h3{font-size:19px;font-weight:700;margin-bottom:10px}
.card p{color:var(--mut);font-size:15px}

/* ===== 加速器特色：节点/速度/协议 ===== */
.dark-sec{background:linear-gradient(160deg,#0b1220,#101a2e);color:#fff}
.dark-sec .sec-title{color:#fff}
.dark-sec .sec-sub{color:#94a3b8}
.node-map{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;margin-top:40px}
.node{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.08);border-radius:14px;padding:18px 12px;text-align:center;transition:.3s}
.node:hover{background:rgba(255,138,0,.15);border-color:rgba(255,138,0,.4)}
.node .flag{font-size:30px}
.node .name{font-weight:700;margin:8px 0 2px}
.node .lat{font-size:12px;color:#34d399}
.protocol-row{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}
.chip{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);padding:12px 20px;border-radius:999px;font-weight:600;font-size:14px}
.chip b{color:#ffb300}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:24px;margin-top:40px;counter-reset:s}
.step{position:relative;padding:28px;background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow)}
.step::before{counter-increment:s;content:counter(s);position:absolute;top:-18px;left:24px;width:40px;height:40px;background:var(--grad);color:#fff;font-weight:800;font-size:18px;border-radius:12px;display:flex;align-items:center;justify-content:center}
.step h4{margin:10px 0 8px;font-weight:700}
.step p{color:var(--mut);font-size:14px}

/* ===== 价格 ===== */
.pricing .grid{align-items:stretch}
.price{text-align:center;position:relative;display:flex;flex-direction:column}
.price.pop{border:2px solid var(--brand);transform:scale(1.03);box-shadow:0 20px 60px rgba(255,138,0,.2)}
.price .badge{position:absolute;top:-14px;left:50%;transform:translateX(-50%);background:var(--grad);color:#fff;font-size:12px;font-weight:700;padding:5px 16px;border-radius:999px}
.price .name{font-size:18px;font-weight:700;color:var(--mut)}
.price .amt{font-size:44px;font-weight:800;margin:14px 0;color:var(--dark)}
.price .amt small{font-size:16px;color:var(--mut);font-weight:500}
.price ul{text-align:left;margin:18px 0 26px;flex:1}
.price ul li{padding:8px 0;font-size:14px;color:var(--mut);border-bottom:1px dashed var(--line)}
.price ul li::before{content:"✓";color:#22c55e;font-weight:800;margin-right:8px}

/* ===== FAQ ===== */
.faq-item{background:var(--card);border:1px solid var(--line);border-radius:14px;margin-bottom:14px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:20px 24px;font-size:17px;font-weight:700;cursor:pointer;display:flex;justify-content:space-between;align-items:center;color:var(--ink)}
.faq-q .plus{font-size:24px;color:var(--brand);transition:.3s}
.faq-item.open .faq-q .plus{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:.35s;padding:0 24px;color:var(--mut);font-size:15px}
.faq-item.open .faq-a{max-height:600px;padding:0 24px 22px}
.faq-a ol{margin-left:20px}
.faq-a ol li{margin-bottom:6px}

/* ===== 评价 ===== */
.testi{background:var(--card);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);border:1px solid var(--line)}
.testi .stars{color:#f59e0b;margin-bottom:12px;letter-spacing:2px}
.testi p{color:var(--ink);font-size:15px;margin-bottom:18px}
.testi .who{display:flex;align-items:center;gap:12px}
.testi .ava{width:44px;height:44px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:18px}
.testi .nm{font-weight:700;font-size:15px}
.testi .rl{font-size:12px;color:var(--mut)}

/* ===== 新闻卡片 ===== */
.news-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);transition:.3s;display:flex;flex-direction:column}
.news-card:hover{transform:translateY(-5px)}
.news-card .thumb{height:180px;overflow:hidden}
.news-card .thumb img{width:100%;height:100%;object-fit:cover}
.news-card .body{padding:20px;display:flex;flex-direction:column;flex:1}
.news-card .date{font-size:12px;color:var(--mut)}
.news-card h3{font-size:17px;font-weight:700;margin:8px 0 10px;line-height:1.4}
.news-card h3 a:hover{color:var(--brand)}
.news-card p{font-size:14px;color:var(--mut);flex:1}
.news-card .more{font-size:14px;font-weight:700;color:var(--brand);margin-top:14px}

/* ===== CTA / 页脚 ===== */
.cta{background:radial-gradient(700px 400px at 50% 0%,rgba(255,138,0,.3),transparent 60%),linear-gradient(160deg,#0b1220,#101a2e);color:#fff;text-align:center;padding:90px 0;border-radius:28px;margin:0 24px 40px}
.cta h2{font-size:40px;font-weight:800;margin-bottom:16px}
.cta p{color:#cbd5e1;margin-bottom:30px;font-size:17px}
footer{background:#0b1220;color:#cbd5e1;padding:64px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-grid h4{color:#fff;font-size:16px;margin-bottom:18px}
.footer-grid a{display:block;color:#94a3b8;font-size:14px;padding:6px 0;transition:.2s}
.footer-grid a:hover{color:var(--brand)}
.footer-brand p{color:#94a3b8;font-size:14px;margin-top:14px;max-width:300px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;text-align:center;font-size:13px;color:#64748b}

/* ===== 页面头（内页） ===== */
.page-hero{background:linear-gradient(160deg,#0b1220,#101a2e);color:#fff;padding:140px 0 70px;text-align:center}
.page-hero h1{font-size:42px;font-weight:800;margin-bottom:14px}
.page-hero p{color:#cbd5e1;max-width:640px;margin:0 auto;font-size:17px}
.crumb{font-size:13px;color:#94a3b8;margin-bottom:18px}
.crumb a{color:#ffb300}

/* ===== 下载页 ===== */
.ver-card{background:var(--card);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);border:1px solid var(--line)}
.ver-card .v{font-size:22px;font-weight:800}
.ver-card .tag{font-size:12px;color:var(--brand);font-weight:700;margin-bottom:8px}
.ver-card .size{color:var(--mut);font-size:13px;margin-bottom:16px}
.ver-card ul{margin:14px 0 22px}
.ver-card ul li{padding:5px 0;font-size:14px;color:var(--mut)}
.ver-card ul li::before{content:"✓";color:#22c55e;font-weight:800;margin-right:8px}
.sys-table{width:100%;border-collapse:collapse;background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.sys-table td{padding:16px 22px;border-bottom:1px solid var(--line);font-size:15px}
.sys-table td:first-child{font-weight:700;color:var(--dark);width:180px;background:#fafbfd}
.sys-table tr:last-child td{border-bottom:none}

/* ===== 新闻详情 ===== */
.article-layout{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:40px;align-items:start}
.article{max-width:100%}
.sidebar{position:sticky;top:90px;display:flex;flex-direction:column;gap:18px}
.sidebar-card{background:var(--card);border-radius:16px;box-shadow:var(--shadow);border:1px solid var(--line);padding:22px 22px 20px}
.sidebar-card h4{display:flex;align-items:center;gap:10px;font-size:16px;font-weight:800;color:var(--dark);margin-bottom:16px}
.sidebar-card h4::before{content:"";width:4px;height:18px;background:var(--grad);border-radius:2px;flex-shrink:0}
.sidebar-card ul{list-style:none}
.toc{position:relative;padding-left:16px}
.toc::before{content:"";position:absolute;left:3px;top:8px;bottom:8px;width:2px;background:var(--line);border-radius:1px}
.toc li{position:relative;padding:7px 0}
.toc a{display:flex;align-items:flex-start;gap:11px;color:var(--mut);font-size:14px;line-height:1.55;transition:.2s;font-weight:500}
.toc a::before{content:"";width:9px;height:9px;border:2px solid #cbd5e1;border-radius:50%;background:#fff;margin-top:5px;flex-shrink:0;transition:.2s}
.toc a:hover{color:var(--brand)}
.toc a:hover::before{border-color:var(--brand);background:var(--brand);box-shadow:0 0 0 3px rgba(255,138,0,.15)}
.toc a.active{color:var(--brand);font-weight:600}
.toc a.active::before{border-color:var(--brand);background:var(--brand)}
.hot-list li{position:relative;padding:8px 0;border-bottom:1px dashed var(--line)}
.hot-list li:last-child{border-bottom:none}
.hot-list a{display:flex;align-items:flex-start;gap:11px;color:var(--ink);font-size:14px;line-height:1.5;transition:.2s;font-weight:500}
.hot-list a:hover{color:var(--brand)}
.hot-list a:hover .rank{transform:scale(1.08)}
.rank{flex-shrink:0;width:22px;height:22px;border-radius:6px;background:#eef2f7;color:#94a3b8;font-size:12px;font-weight:700;display:flex;align-items:center;justify-content:center;margin-top:1px;transition:.2s;font-style:normal}
.hot-list li:nth-child(1) .rank{background:linear-gradient(135deg,#ff6a00,#ffb300);color:#fff;box-shadow:0 3px 8px rgba(255,138,0,.3)}
.hot-list li:nth-child(2) .rank{background:#ffe4c4;color:#ff8a00}
.hot-list li:nth-child(3) .rank{background:#fef3c7;color:#d97706}
.tag-list{display:flex;flex-wrap:wrap;gap:9px}
.tag-list a{display:inline-flex;align-items:center;padding:6px 15px;border-radius:999px;background:#f1f5f9;color:var(--mut);font-size:13px;font-weight:600;transition:.2s;border:1px solid transparent}
.tag-list a:hover{background:rgba(255,138,0,.1);color:var(--brand);border-color:rgba(255,138,0,.35)}
.tag-list a::before{content:"#";margin-right:3px;opacity:.5}
.article .cover{border-radius:20px;overflow:hidden;margin-bottom:30px}
.article .cover img{width:100%}
.article h1{font-size:34px;font-weight:800;line-height:1.35;margin-bottom:18px;color:var(--dark)}
.article .meta{color:var(--mut);font-size:14px;margin-bottom:30px;padding-bottom:20px;border-bottom:1px solid var(--line)}
.article .content h2{font-size:24px;font-weight:800;margin:34px 0 16px;color:var(--dark)}
.article .content p{font-size:16px;color:var(--ink);margin-bottom:18px;line-height:1.9}
.article .content img{border-radius:14px;margin:20px 0}
.article .lead{font-size:18px;color:var(--mut);margin-bottom:24px}
.comments{margin-top:40px;padding-top:30px;border-top:1px solid var(--line)}
.comments h3{font-size:20px;font-weight:800;margin-bottom:20px}
.comment{display:flex;gap:14px;padding:18px 0;border-bottom:1px dashed var(--line)}
.comment .ava{width:42px;height:42px;border-radius:50%;background:var(--grad);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;flex-shrink:0}
.comment .nm{font-weight:700;font-size:14px}
.comment .dt{font-size:12px;color:var(--mut);margin-left:8px}
.comment p{font-size:14px;color:var(--ink);margin-top:4px}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:30px;flex-wrap:wrap}
.article-nav a{font-size:14px;font-weight:600;color:var(--brand)}

/* ===== sitemap/404 ===== */
.sitemap-list{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:30px;border:1px solid var(--line)}
.sitemap-list h3{font-size:18px;font-weight:800;margin:20px 0 12px}
.sitemap-list a{display:block;padding:8px 0;color:var(--ink);font-size:15px;border-bottom:1px dashed var(--line)}
.sitemap-list a:hover{color:var(--brand)}
.err-404{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center}
.err-404 h1{font-size:120px;font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}
.err-404 p{color:var(--mut);font-size:18px;margin:16px 0 28px}

/* ===== 响应式 ===== */
@media(max-width:992px){
  .nav-menu,.nav-actions .btn-ghost{display:none}
  .burger{display:flex}
  .nav.open .nav-menu{display:flex;position:absolute;top:100%;left:0;right:0;background:rgba(11,18,32,.98);flex-direction:column;padding:16px 24px;gap:4px;border-top:1px solid rgba(255,255,255,.1)}
  .nav.open .nav-menu>li{width:100%}
  .nav.open .nav-menu>li>a{justify-content:space-between;padding:14px 10px}
  .dropdown{position:static;opacity:1;visibility:visible;transform:none;background:transparent;box-shadow:none;padding:0 0 0 16px;min-width:0;display:none}
  .nav.open .dropdown.show{display:block}
  .dropdown a{color:#cbd5e1}
  .hero-grid,.footer-grid{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .node-map{grid-template-columns:repeat(3,1fr)}
  .steps{grid-template-columns:repeat(2,1fr)}
  .hero{padding-top:120px}
  .hero h1{font-size:40px}
  .sec-title{font-size:32px}
  .cta{margin:0 16px 30px}
  .article-layout{grid-template-columns:1fr}
  .sidebar{position:static}
}
@media(max-width:768px){
  .grid-3,.grid-4,.grid-2{grid-template-columns:1fr}
  .node-map{grid-template-columns:repeat(2,1fr)}
  .hero h1{font-size:34px}
  .hero .lead{font-size:17px}
  .hero-stats{gap:24px}
  .stat .num{font-size:28px}
  .demo{margin-top:10px}
  .sec-title{font-size:28px}
  .price.pop{transform:none}
  .sys-table td{display:block;width:100%}
  .sys-table td:first-child{width:100%;border-bottom:none;padding-bottom:4px}
}
@media(max-width:480px){
  section{padding:60px 0}
  .container{padding:0 18px}
  .hero{padding:110px 0 70px}
  .hero h1{font-size:28px}
  .hero-btns .btn{width:100%}
  .steps,.node-map{grid-template-columns:1fr}
  .gauge{width:180px;height:180px}
  .demo-metrics{grid-template-columns:1fr 1fr}
  .article h1{font-size:26px}
  .footer-grid{grid-template-columns:1fr 1fr}
  .cta h2{font-size:28px}
  .err-404 h1{font-size:80px}
}