:root{--navy:#0b1220;--navy2:#0f1a2e;--ink:#eaf0ff;--muted:#9aa7c7;--brand:#4f6bff;--brand2:#7a5cff;--cyan:#21d4fd;--emerald:#19c37d;--card:#131e33;--card2:#182442;--line:#233050;--gold:#f7b733}*{margin:0;padding:0;box-sizing:border-box}html{scroll-behavior:smooth}body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Arial,sans-serif;background:var(--navy);color:var(--ink);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}a{color:var(--cyan);text-decoration:none}a:hover{text-decoration:underline}img{max-width:100%;height:auto;display:block}.container{max-width:1180px;margin:0 auto;padding:0 20px}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}.grad{background:linear-gradient(90deg,var(--brand),var(--brand2),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent}.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 26px;border-radius:12px;font-weight:600;font-size:15px;border:1px solid transparent;transition:.2s}.btn:hover{text-decoration:none;transform:translateY(-2px)}.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;box-shadow:0 8px 24px rgba(79,107,255,.35)}.btn-ghost{background:rgba(255,255,255,.04);border-color:var(--line);color:var(--ink)}.btn-green{background:linear-gradient(135deg,#19c37d,#0ea5e9);color:#fff}.badge{display:inline-block;padding:3px 12px;border-radius:999px;font-size:12px;font-weight:600;background:rgba(33,212,253,.12);color:var(--cyan);border:1px solid rgba(33,212,253,.3)}
/* header */
.site-head{position:sticky;top:0;z-index:100;background:rgba(11,18,32,.9);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}.nav{display:flex;align-items:center;justify-content:space-between;height:66px}.logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#fff}.logo img{width:34px;height:34px;border-radius:8px}.logo:hover{text-decoration:none}.nav-links{display:flex;gap:6px;align-items:center}.nav-links a{color:var(--muted);padding:8px 13px;border-radius:8px;font-size:14px;font-weight:500}.nav-links a:hover{color:#fff;background:rgba(255,255,255,.06);text-decoration:none}.nav-cta{margin-left:6px}
/* hero */
.hero{position:relative;overflow:hidden;padding:70px 0 60px;background:radial-gradient(1000px 500px at 80% -10%,rgba(79,107,255,.25),transparent 60%),radial-gradient(700px 400px at 0% 100%,rgba(33,212,253,.12),transparent 55%)}.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}.hero h1{font-size:44px;line-height:1.2;font-weight:800;margin-bottom:18px}.hero .sub{color:var(--muted);font-size:18px;max-width:520px;margin-bottom:26px}.hero-actions{display:flex;gap:14px;flex-wrap:wrap}.hero-meta{display:flex;gap:22px;margin-top:30px;flex-wrap:wrap}.hero-meta div b{display:block;font-size:22px;color:#fff}.hero-meta div span{font-size:13px;color:var(--muted)}
/* client mockup */
.mock{background:linear-gradient(180deg,var(--card2),#0d1528);border:1px solid var(--line);border-radius:18px;box-shadow:0 30px 60px rgba(0,0,0,.5);overflow:hidden}.mock-title{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid var(--line);font-size:13px;color:var(--muted)}.mock-title .dot{width:11px;height:11px;border-radius:50%}.mock-body{padding:18px}.mock-status{display:flex;align-items:center;gap:14px;padding:16px;border-radius:14px;background:rgba(25,195,125,.1);border:1px solid rgba(25,195,125,.3);margin-bottom:14px}.mock-status .flag{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--emerald),var(--cyan));display:flex;align-items:center;justify-content:center;font-size:20px}.mock-status h4{font-size:16px}.mock-status p{font-size:12px;color:var(--emerald)}.mock-status .ping{margin-left:auto;text-align:right}.mock-status .ping b{font-size:18px;color:#fff}.mock-status .ping span{font-size:11px;color:var(--muted)}.mock-row{display:flex;align-items:center;justify-content:space-between;padding:11px 6px;border-bottom:1px solid rgba(255,255,255,.04);font-size:13.5px}.mock-row .l{color:var(--muted)}.mock-row .r{color:#fff;font-weight:600}.mock-conn{width:100%;margin-top:14px}.mock-list{display:flex;flex-direction:column;gap:8px;margin:12px 0}.mock-node{display:flex;align-items:center;gap:10px;padding:10px 12px;border-radius:10px;background:rgba(255,255,255,.03);border:1px solid var(--line);font-size:13px}.mock-node .c{width:8px;height:8px;border-radius:50%;background:var(--emerald)}.mock-node .sp{margin-left:auto;color:var(--emerald);font-size:12px}
/* sections */
.section{padding:64px 0}.sec-head{text-align:center;max-width:720px;margin:0 auto 44px}.sec-head .kicker{font-size:13px;font-weight:700;letter-spacing:2px;text-transform:uppercase;color:var(--cyan)}.sec-head h2{font-size:32px;font-weight:800;margin:10px 0 12px}.sec-head p{color:var(--muted)}
/* notice */
.notice{background:linear-gradient(135deg,rgba(247,183,51,.12),rgba(247,183,51,.04));border:1px solid rgba(247,183,51,.3);border-radius:14px;padding:18px 22px;display:flex;gap:14px;align-items:flex-start;margin-bottom:8px}.notice .ico{font-size:22px}.notice h4{font-size:15px;margin-bottom:2px}.notice p{font-size:13.5px;color:var(--muted)}
/* cards */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}.grid-6{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:26px;transition:.2s}.card:hover{border-color:rgba(79,107,255,.5);transform:translateY(-3px)}.card .ico{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:24px;margin-bottom:16px;background:linear-gradient(135deg,rgba(79,107,255,.2),rgba(33,212,253,.15))}.card h3{font-size:18px;margin-bottom:10px}.card p{color:var(--muted);font-size:14.5px}
/* compare table */
.table-wrap{overflow-x:auto;border:1px solid var(--line);border-radius:16px}.cmp{width:100%;border-collapse:collapse;min-width:640px}.cmp th,.cmp td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}.cmp thead th{background:var(--card2);font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.5px}.cmp td b{color:#fff}.cmp .yes{color:var(--emerald);font-weight:700}.cmp .no{color:#ff6b6b}.cmp .me{background:rgba(79,107,255,.08)}.cmp .me td:first-child{color:var(--cyan);font-weight:700}
/* news tabs */
.tabs{display:flex;gap:8px;margin-bottom:22px;flex-wrap:wrap}.tabs a{padding:9px 18px;border-radius:999px;font-size:14px;font-weight:600;color:var(--muted);background:rgba(255,255,255,.03);border:1px solid var(--line)}.tabs a.on{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;border-color:transparent}.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.news-card{background:var(--card);border:1px solid var(--line);border-radius:16px;overflow:hidden;transition:.2s}.news-card:hover{transform:translateY(-3px);border-color:rgba(79,107,255,.5)}.news-card .thumb{height:150px;overflow:hidden}.news-card .thumb img{width:100%;height:100%;object-fit:cover}.news-card .body{padding:18px}.news-card .cat{font-size:12px;color:var(--cyan);font-weight:600}.news-card h4{font-size:16px;margin:8px 0 8px;line-height:1.4}.news-card h4 a{color:#fff}.news-card p{font-size:13px;color:var(--muted)}.news-card .meta{font-size:12px;color:var(--muted);margin-top:10px}
/* reviews */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.review{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}.review .stars{color:var(--gold);font-size:15px;margin-bottom:12px}.review p{font-size:14px;color:var(--ink);margin-bottom:16px}.review .who{display:flex;align-items:center;gap:12px}.review .who .av{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--cyan));display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff}.review .who b{font-size:14px;display:block}.review .who span{font-size:12px;color:var(--muted)}
/* download */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:16px}.dl-card{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 14px;text-align:center;transition:.2s}.dl-card:hover{transform:translateY(-3px);border-color:rgba(25,195,125,.5)}.dl-card .os{font-size:30px;margin-bottom:10px}.dl-card h4{font-size:15px;margin-bottom:6px}.dl-card p{font-size:12px;color:var(--muted);margin-bottom:14px}.dl-card a{display:inline-block;padding:8px 18px;border-radius:10px;background:linear-gradient(135deg,#19c37d,#0ea5e9);color:#fff;font-size:13px;font-weight:600}.dl-card a:hover{text-decoration:none}
/* trust */
.trust{display:flex;flex-wrap:wrap;gap:14px;justify-content:center}.trust .t{display:flex;align-items:center;gap:10px;padding:12px 20px;background:var(--card);border:1px solid var(--line);border-radius:12px;font-size:14px}.trust .t .e{font-size:20px}
/* scenarios */
.sc-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.sc{background:var(--card);border:1px solid var(--line);border-radius:16px;padding:24px}.sc .e{font-size:28px;margin-bottom:12px}.sc h4{font-size:16px;margin-bottom:8px}.sc p{font-size:13.5px;color:var(--muted)}
/* faq */
.faq-group{margin-bottom:28px}.faq-group h3{font-size:19px;margin-bottom:14px;display:flex;align-items:center;gap:10px}.faq-group h3 .n{width:28px;height:28px;border-radius:8px;background:linear-gradient(135deg,var(--brand),var(--brand2));display:inline-flex;align-items:center;justify-content:center;font-size:14px;color:#fff}.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:10px;overflow:hidden;background:var(--card)}.faq-item summary{padding:16px 20px;cursor:pointer;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center;font-size:15px}.faq-item summary::-webkit-details-marker{display:none}.faq-item summary:after{content:"+";font-size:22px;color:var(--cyan);font-weight:400}.faq-item[open] summary:after{content:"–"}.faq-item .ans{padding:0 20px 18px;color:var(--muted);font-size:14.5px}.faq-item .ans ol{padding-left:20px;margin-top:8px}.faq-item .ans li{margin-bottom:8px}
/* breadcrumb */
.crumb{font-size:13px;color:var(--muted);padding:22px 0 0}.crumb a{color:var(--muted)}.crumb a:hover{color:var(--cyan)}.crumb span{color:var(--cyan)}
/* article */
.article-wrap{display:grid;grid-template-columns:1fr 320px;gap:36px;padding:30px 0 60px}.article-main h1{font-size:30px;font-weight:800;line-height:1.35;margin:14px 0 16px}.art-meta{display:flex;gap:18px;font-size:13px;color:var(--muted);margin-bottom:20px;flex-wrap:wrap}.art-cover{border-radius:16px;overflow:hidden;margin-bottom:26px;border:1px solid var(--line)}.article-main h2{font-size:22px;font-weight:700;margin:30px 0 14px;padding-left:14px;border-left:4px solid var(--brand)}.article-main p{margin-bottom:16px;color:#d7def5;font-size:15.5px}.article-main .toc{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px 24px;margin:24px 0}.article-main .toc h3{font-size:15px;margin-bottom:10px}.article-main .toc a{display:block;padding:4px 0;font-size:14px;color:var(--muted)}.article-main .toc a:hover{color:var(--cyan)}.art-img{border-radius:14px;overflow:hidden;margin:22px 0;border:1px solid var(--line)}.art-img figcaption{font-size:12.5px;color:var(--muted);padding:8px 12px;background:var(--card2)}.data-table{width:100%;border-collapse:collapse;margin:20px 0;border:1px solid var(--line);border-radius:12px;overflow:hidden}.data-table th{background:var(--card2);padding:11px 14px;text-align:left;font-size:13px;color:var(--cyan)}.data-table td{padding:11px 14px;border-top:1px solid var(--line);font-size:14px}.data-table tr:nth-child(even) td{background:rgba(255,255,255,.02)}.quote{background:linear-gradient(135deg,rgba(79,107,255,.1),rgba(33,212,253,.05));border-left:4px solid var(--brand);padding:18px 22px;border-radius:0 12px 12px 0;margin:20px 0;font-style:italic;color:#c8d3f0}.art-nav{display:flex;justify-content:space-between;gap:14px;margin-top:36px;padding-top:20px;border-top:1px solid var(--line);flex-wrap:wrap}.art-nav a{font-size:14px;color:var(--cyan)}
/* sidebar */
.side .box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;margin-bottom:22px}.side .box h3{font-size:15px;margin-bottom:14px;padding-bottom:10px;border-bottom:1px solid var(--line)}.side .box a{display:block;font-size:13.5px;color:var(--muted);padding:7px 0;border-bottom:1px solid rgba(255,255,255,.04)}.side .box a:last-child{border-bottom:none}.side .box a:hover{color:var(--cyan)}.side .box a .n{display:inline-block;width:20px;height:20px;line-height:20px;text-align:center;border-radius:6px;background:rgba(79,107,255,.2);color:var(--cyan);font-size:12px;margin-right:8px;font-weight:700}
/* comments */
.comments{margin-top:36px}.comments h3{font-size:18px;margin-bottom:16px}.cmt{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}.cmt .av{width:40px;height:40px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff;font-size:15px}.cmt b{font-size:14px}.cmt .t{font-size:12px;color:var(--muted);margin-left:8px}.cmt p{font-size:14px;color:var(--muted);margin-top:4px}
/* CTA + footer */
.cta{background:linear-gradient(135deg,var(--brand),var(--brand2));border-radius:22px;padding:50px 40px;text-align:center;margin:20px 0 60px}.cta h2{font-size:30px;font-weight:800;margin-bottom:12px;color:#fff}.cta p{color:rgba(255,255,255,.85);margin-bottom:24px}.cta .btn{background:#fff;color:var(--brand)}.footer{background:#070c16;border-top:1px solid var(--line);padding:56px 0 30px}.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px;margin-bottom:34px}.footer h4{font-size:15px;margin-bottom:16px}.footer a{display:block;font-size:13.5px;color:var(--muted);padding:4px 0}.footer a:hover{color:var(--cyan)}.footer .desc{font-size:13.5px;color:var(--muted);max-width:300px;margin-top:12px}.flinks{display:flex;flex-wrap:wrap;gap:8px 18px;padding:18px 0;border-top:1px solid var(--line);margin-bottom:18px}.flinks a{font-size:13px;color:var(--muted)}.flinks a:hover{color:var(--cyan)}.copyright{text-align:center;font-size:12.5px;color:#5a6685}
/* misc */
.sitemap-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}.sitemap-grid .col{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px}.sitemap-grid h3{font-size:15px;margin-bottom:14px}.sitemap-grid a{display:block;font-size:13.5px;color:var(--muted);padding:5px 0}.sitemap-grid a:hover{color:var(--cyan)}
.page404{text-align:center;padding:100px 20px}.page404 h1{font-size:110px;font-weight:800;background:linear-gradient(135deg,var(--brand),var(--cyan));-webkit-background-clip:text;background-clip:text;color:transparent;line-height:1}.page404 p{color:var(--muted);font-size:18px;margin:20px 0 30px}
@media(max-width:960px){.hero-grid,.grid-3,.grid-6,.review-grid,.news-grid,.sc-grid,.footer-grid,.article-wrap,.sitemap-grid{grid-template-columns:1fr}.dl-grid{grid-template-columns:repeat(2,1fr)}.grid-2{grid-template-columns:1fr}.hero h1{font-size:32px}.side{order:2}}