:root{--brand:#16a34a;--brand-2:#22c55e;--brand-dark:#15803d;--ink:#0f172a;--body:#334155;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc;--card:#ffffff;--navy:#0b1220;--amber:#f59e0b;--red:#ef4444;--radius:16px;--shadow:0 10px 30px rgba(15,23,42,.08);--shadow-lg:0 24px 60px rgba(15,23,42,.14);--font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);color:var(--body);background:var(--bg);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;font-weight:700}
.section{padding:72px 0}
.section-tag{display:inline-block;font-size:13px;font-weight:600;color:var(--brand);background:#ecfdf5;border:1px solid #bbf7d0;padding:4px 12px;border-radius:999px;margin-bottom:14px}
.section-title{font-size:34px;margin-bottom:12px}
.section-sub{color:var(--muted);font-size:17px;max-width:680px}
.center{text-align:center}
.center .section-sub{margin:0 auto}
/* header */
.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:24px}
.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:var(--ink)}
.logo img{width:30px;height:30px;border-radius:7px}
.nav{display:flex;align-items:center;gap:26px;font-size:15px;font-weight:500}
.nav a{color:var(--body);transition:color .2s}
.nav a:hover{color:var(--brand)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:10px;font-weight:600;font-size:15px;padding:11px 22px;transition:.2s;border:1px solid transparent;cursor:pointer}
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand-2));color:#fff;box-shadow:0 8px 20px rgba(22,163,74,.28)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 26px rgba(22,163,74,.38)}
.btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-lg{padding:14px 30px;font-size:16px}
/* hero */
.hero{background:radial-gradient(1200px 600px at 80% -10%,#14532d 0%,transparent 55%),linear-gradient(180deg,#0b1220 0%,#101c33 100%);color:#e2e8f0;padding:70px 0 80px;overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(34,197,94,.14);border:1px solid rgba(34,197,94,.4);color:#86efac;font-size:13px;font-weight:600;padding:6px 14px;border-radius:999px;margin-bottom:20px}
.hero h1{color:#fff;font-size:46px;line-height:1.2;margin-bottom:18px}
.hero h1 .hl{background:linear-gradient(90deg,#4ade80,#a3e635);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.lead{color:#cbd5e1;font-size:18px;max-width:520px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;margin-bottom:26px}
.hero-stats{display:flex;gap:34px;flex-wrap:wrap}
.hero-stats .stat b{display:block;font-size:26px;color:#fff}
.hero-stats .stat span{color:#94a3b8;font-size:13px}
/* client simulator */
.client{background:#fff;border-radius:18px;box-shadow:var(--shadow-lg);overflow:hidden;color:var(--ink);border:1px solid rgba(255,255,255,.08)}
.client-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#f1f5f9;border-bottom:1px solid var(--line)}
.dot{width:11px;height:11px;border-radius:50%}
.dot.r{background:#f87171}.dot.y{background:#fbbf24}.dot.g{background:#34d399}
.client-bar .title{flex:1;text-align:center;font-size:13px;color:var(--muted);font-weight:500}
.client-body{padding:20px}
.client-status{display:flex;align-items:center;justify-content:space-between;background:linear-gradient(135deg,#ecfdf5,#f0fdf4);border:1px solid #bbf7d0;border-radius:14px;padding:16px 18px;margin-bottom:18px}
.client-status .left{display:flex;align-items:center;gap:12px}
.ping-dot{width:12px;height:12px;border-radius:50%;background:var(--brand-2);box-shadow:0 0 0 0 rgba(34,197,94,.5);animation:ping 1.6s infinite}
@keyframes ping{0%{box-shadow:0 0 0 0 rgba(34,197,94,.5)}70%{box-shadow:0 0 0 10px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}
.client-status b{display:block;color:var(--ink);font-size:15px}
.client-status small{color:var(--muted);font-size:12px}
.connect-btn{background:var(--brand);color:#fff;border:none;border-radius:10px;padding:10px 20px;font-weight:700;font-size:14px}
.node-row{display:flex;align-items:center;gap:12px;padding:12px 10px;border-radius:10px;font-size:14px;border:1px solid transparent}
.node-row.active{background:#f0fdf4;border-color:#bbf7d0}
.node-row .flag{width:26px;height:18px;border-radius:4px;background:linear-gradient(135deg,#3b82f6,#60a5fa);flex-shrink:0}
.node-row .flag.jp{background:linear-gradient(135deg,#ef4444,#f87171)}
.node-row .flag.sg{background:linear-gradient(135deg,#10b981,#34d399)}
.node-row .flag.us{background:linear-gradient(135deg,#6366f1,#818cf8)}
.node-row .name{flex:1;font-weight:600;color:var(--ink)}
.node-row .ms{color:var(--brand);font-weight:700;font-size:13px}
.node-row .bar{width:60px;height:5px;background:#e2e8f0;border-radius:3px;overflow:hidden}
.node-row .bar i{display:block;height:100%;background:var(--brand-2)}
.client-graph{margin-top:16px;background:#f8fafc;border-radius:12px;padding:14px}
.client-graph .g-title{font-size:12px;color:var(--muted);margin-bottom:8px;display:flex;justify-content:space-between}
.graph{display:flex;align-items:flex-end;gap:5px;height:60px}
.graph span{flex:1;background:linear-gradient(180deg,#22c55e,#15803d);border-radius:3px 3px 0 0;opacity:.85}
/* notice */
.notice-bar{background:#fffbeb;border-bottom:1px solid #fde68a;padding:12px 0}
.notice-bar .container{display:flex;align-items:center;gap:10px;font-size:14px;color:#92400e;flex-wrap:wrap}
.notice-bar .tag{background:#f59e0b;color:#fff;font-size:12px;font-weight:700;padding:2px 10px;border-radius:6px}
/* features */
.grid{display:grid;gap:24px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:#bbf7d0}
.card .ic{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;background:#ecfdf5;color:var(--brand);margin-bottom:16px}
.card h3{font-size:19px;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
/* comparison */
.compare{background:var(--navy);color:#e2e8f0}
.compare h2{color:#fff}
.table-wrap{overflow-x:auto;margin-top:34px;background:#fff;border-radius:var(--radius);box-shadow:var(--shadow-lg)}
table.cmp{width:100%;border-collapse:collapse;min-width:640px}
.cmp th,.cmp td{padding:16px 20px;text-align:center;font-size:14px;color:var(--body)}
.cmp thead th{background:#0f172a;color:#fff;font-size:15px}
.cmp thead th.hl{background:var(--brand)}
.cmp tbody tr:nth-child(even){background:#f8fafc}
.cmp td:first-child{text-align:left;font-weight:600;color:var(--ink)}
.check{color:var(--brand);font-weight:700}
.cross{color:#cbd5e1}
/* news tabs */
.tabs{display:flex;gap:10px;margin:28px 0;flex-wrap:wrap}
.tab{background:#fff;border:1px solid var(--line);border-radius:999px;padding:8px 20px;font-size:14px;font-weight:600;color:var(--body);cursor:pointer}
.tab.active{background:var(--brand);color:#fff;border-color:var(--brand)}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:.25s}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg)}
.news-card img{width:100%;height:170px;object-fit:cover}
.news-card .body{padding:18px}
.news-card .meta{font-size:12px;color:var(--muted);margin-bottom:8px}
.news-card h4{font-size:16px;margin-bottom:8px;line-height:1.4}
.news-card h4 a:hover{color:var(--brand)}
/* comments */
.comments{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.comment{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.comment .stars{color:var(--amber);margin-bottom:12px;letter-spacing:2px}
.comment p{color:var(--body);font-size:15px;margin-bottom:16px}
.comment .user{display:flex;align-items:center;gap:10px}
.avatar{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#22c55e,#a3e635);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:15px}
.comment .user b{display:block;font-size:14px;color:var(--ink)}
.comment .user small{color:var(--muted);font-size:12px}
/* download */
.download-section{background:linear-gradient(180deg,#0b1220,#101c33);color:#e2e8f0}
.download-section h2{color:#fff}
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px;margin-top:36px}
.dl-card{background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.1);border-radius:var(--radius);padding:24px;text-align:center;transition:.25s}
.dl-card:hover{background:rgba(34,197,94,.1);border-color:rgba(34,197,94,.5);transform:translateY(-4px)}
.dl-card .ic{width:52px;height:52px;margin:0 auto 14px;border-radius:14px;background:linear-gradient(135deg,#22c55e,#15803d);display:flex;align-items:center;justify-content:center;font-size:24px}
.dl-card b{display:block;color:#fff;font-size:16px;margin-bottom:4px}
.dl-card small{color:#94a3b8;font-size:12px}
/* trust */
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.trust-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;text-align:center}
.trust-item b{display:block;font-size:22px;color:var(--ink);margin-bottom:6px}
.trust-item span{font-size:13px;color:var(--muted)}
/* scenarios */
.scen-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.scen{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.scen h3{font-size:18px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.scen p{color:var(--muted);font-size:15px}
/* faq */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:var(--radius);margin-bottom:14px;overflow:hidden}
.faq-q{width:100%;text-align:left;background:none;border:none;padding:20px 24px;font-size:17px;font-weight:600;color:var(--ink);cursor:pointer;display:flex;justify-content:space-between;align-items:center;font-family:var(--font)}
.faq-q .plus{font-size:22px;color:var(--brand);font-weight:400}
.faq-a{padding:0 24px 20px;color:var(--body);font-size:15px}
.faq-a ol{margin-left:20px}
.faq-a ol li{margin-bottom:8px}
.faq-a .step-t{font-weight:600;color:var(--ink)}
/* cta */
.cta{background:linear-gradient(135deg,#15803d,#22c55e);color:#fff;border-radius:24px;padding:52px;text-align:center;box-shadow:var(--shadow-lg)}
.cta h2{color:#fff;font-size:32px;margin-bottom:12px}
.cta p{color:#ecfdf5;margin-bottom:24px;font-size:17px}
/* footer */
footer{background:#0b1220;color:#94a3b8;padding:56px 0 0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.footer-grid h4{color:#fff;font-size:15px;margin-bottom:16px}
.footer-grid a{display:block;color:#94a3b8;font-size:14px;margin-bottom:10px}
.footer-grid a:hover{color:#4ade80}
.footer-logo{color:#fff;font-size:18px;font-weight:800;display:flex;align-items:center;gap:8px;margin-bottom:12px}
.footer-logo img{width:24px;height:24px;border-radius:5px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;font-size:13px;text-align:center}
.friend-links{font-size:13px;color:#64748b;margin-bottom:8px}
.friend-links a{color:#94a3b8;margin:0 4px}
.friend-links a:hover{color:#4ade80}
/* breadcrumb */
.crumb{background:#fff;border-bottom:1px solid var(--line);padding:16px 0;font-size:14px;color:var(--muted)}
.crumb a:hover{color:var(--brand)}
/* article */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:40px;align-items:start}
.article-body{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.article-body h1{font-size:30px;margin:16px 0 14px}
.article-body .ameta{color:var(--muted);font-size:14px;margin-bottom:22px;display:flex;gap:16px;flex-wrap:wrap}
.article-body h2{font-size:22px;margin:30px 0 14px;padding-left:12px;border-left:4px solid var(--brand)}
.article-body p{margin-bottom:16px;font-size:16px}
.article-body img{border-radius:12px;margin:20px 0}
.article-body table{width:100%;border-collapse:collapse;margin:20px 0;font-size:14px}
.article-body table th,.article-body table td{border:1px solid var(--line);padding:10px 14px;text-align:left}
.article-body table th{background:#f1f5f9;color:var(--ink)}
.article-body blockquote{border-left:4px solid var(--brand);background:#f0fdf4;padding:16px 20px;margin:20px 0;border-radius:0 10px 10px 0;color:var(--ink)}
.article-nav{display:flex;justify-content:space-between;gap:12px;margin-top:30px;padding-top:20px;border-top:1px solid var(--line);font-size:14px}
.article-nav a{color:var(--brand);font-weight:600}
.sidebar{position:sticky;top:84px}
.side-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;margin-bottom:20px;box-shadow:var(--shadow)}
.side-box h4{font-size:16px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}
.side-box a{display:block;color:var(--body);font-size:14px;margin-bottom:12px;line-height:1.4}
.side-box a:hover{color:var(--brand)}
.side-box a small{color:var(--muted);display:block;font-size:12px}
.related-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:30px}
/* page hero (inner) */
.page-hero{background:radial-gradient(900px 400px at 80% -20%,#14532d,transparent 60%),linear-gradient(180deg,#0b1220,#101c33);color:#e2e8f0;padding:56px 0}
.page-hero h1{color:#fff;font-size:38px;margin-bottom:12px}
.page-hero p{color:#cbd5e1;font-size:17px;max-width:640px}
/* dl page */
.dl-table{background:#fff;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line)}
.dl-row{display:flex;align-items:center;gap:16px;padding:18px 24px;border-bottom:1px solid var(--line)}
.dl-row:last-child{border-bottom:none}
.dl-row .ic{width:44px;height:44px;border-radius:10px;background:#ecfdf5;display:flex;align-items:center;justify-content:center;font-size:22px}
.dl-row .info{flex:1}
.dl-row .info b{display:block;color:var(--ink);font-size:16px}
.dl-row .info small{color:var(--muted);font-size:13px}
/* toast/nav mobile */
@media(max-width:960px){.hero-grid,.article-layout,.grid-3,.grid-2,.comments,.news-grid,.dl-grid,.scen-grid,.trust-grid,.footer-grid,.related-grid{grid-template-columns:1fr}.client{margin-top:10px}.hero h1{font-size:34px}.section-title{font-size:28px}.nav{display:none}.sidebar{position:static}}