:root{--navy:#0f2a52;--dark:#0f172a;--cyan:#06b6d4;--emerald:#10b981;--ink:#0f172a;--muted:#64748b;--line:#e2e8f0;--bg:#f8fafc;--card:#ffffff}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
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{color:inherit;text-decoration:none}
img{max-width:100%;height:auto;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:0;background:#06b6d4;color:#fff;padding:8px 14px;z-index:999}
.skip:focus{left:0}
/* header */
header{background:var(--navy);position:sticky;top:0;z-index:100;box-shadow:0 2px 12px rgba(0,0,0,.18)}
.nav{display:flex;align-items:center;justify-content:space-between;height:66px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:20px;color:#fff}
.brand img{width:34px;height:34px;border-radius:6px}
.brand span{color:#7dd3fc}
.nav-links{display:flex;align-items:center;gap:26px}
.nav-links a{color:#cbd5e1;font-size:15px;font-weight:500;transition:.2s}
.nav-links a:hover{color:#fff}
.nav-links a.cta{background:var(--emerald);color:#fff;padding:9px 18px;border-radius:8px;font-weight:700}
.nav-links a.cta:hover{background:#059669}
.nav-toggle{display:none}
.nav-links{flex-wrap:wrap;gap:14px}
/* hero */
.hero{background:linear-gradient(135deg,#0f2a52 0%,#123a6b 55%,#0e5a6e 100%);color:#fff;padding:56px 0 66px;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 80% 20%,rgba(6,182,212,.25),transparent 45%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;position:relative;z-index:2}
.hero h1{font-size:38px;line-height:1.25;font-weight:800;margin-bottom:16px}
.hero h1 .hl{color:#67e8f9}
.hero p.lead{color:#cbd5e1;font-size:17px;max-width:520px;margin-bottom:26px}
.hero-meta{display:flex;gap:18px;flex-wrap:wrap;margin-bottom:26px}
.hero-meta .chip{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:6px 14px;border-radius:20px;font-size:13px;color:#e2e8f0}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-block;padding:14px 28px;border-radius:10px;font-weight:700;font-size:16px;text-align:center;transition:.2s}
.btn-primary{background:var(--emerald);color:#fff}
.btn-primary:hover{background:#059669;transform:translateY(-2px)}
.btn-ghost{background:transparent;color:#fff;border:2px solid rgba(255,255,255,.4)}
.btn-ghost:hover{border-color:#fff}
.btn-cyan{background:var(--cyan);color:#082f49}
.btn-cyan:hover{background:#22d3ee}
/* client simulator */
.sim{background:#0b1220;border-radius:14px;box-shadow:0 20px 50px rgba(0,0,0,.45);overflow:hidden;border:1px solid #1e293b}
.sim-top{display:flex;align-items:center;gap:8px;padding:12px 16px;background:#111827;border-bottom:1px solid #1e293b}
.sim-dot{width:12px;height:12px;border-radius:50%}
.sim-dot.r{background:#f87171}.sim-dot.y{background:#fbbf24}.sim-dot.g{background:#34d399}
.sim-title{margin-left:8px;color:#94a3b8;font-size:13px}
.sim-body{padding:22px}
.sim-status{display:flex;align-items:center;gap:12px;margin-bottom:18px}
.sim-toggle{width:56px;height:30px;border-radius:20px;background:var(--emerald);position:relative}
.sim-toggle::after{content:"";position:absolute;top:3px;right:3px;width:24px;height:24px;border-radius:50%;background:#fff}
.sim-status b{font-size:16px}
.sim-status small{color:#64748b;display:block;font-size:12px}
.sim-row{display:flex;justify-content:space-between;align-items:center;padding:13px 0;border-top:1px solid #1e293b;color:#cbd5e1;font-size:14px}
.sim-row b{color:#fff}
.sim-row .tag{background:rgba(16,185,129,.15);color:#34d399;padding:3px 10px;border-radius:12px;font-size:12px}
.sim-bar{height:8px;background:#1e293b;border-radius:4px;overflow:hidden;margin-top:6px}
.sim-bar i{display:block;height:100%;background:linear-gradient(90deg,#06b6d4,#10b981);width:78%}
.sim-flag{display:flex;align-items:center;gap:8px}
.sim-flag .dot{width:10px;height:10px;border-radius:50%;background:#06b6d4}
/* section */
section{padding:64px 0}
.sec-head{text-align:center;max-width:720px;margin:0 auto 44px}
.sec-head h2{font-size:30px;font-weight:800;margin-bottom:12px}
.sec-head p{color:var(--muted);font-size:16px}
.kicker{display:inline-block;color:var(--cyan);font-weight:700;font-size:13px;letter-spacing:1px;text-transform:uppercase;margin-bottom:8px}
/* notice */
.notice{background:var(--dark);color:#fff}
.notice-box{background:#1e293b;border-left:4px solid var(--cyan);padding:20px 24px;border-radius:8px;display:flex;gap:16px;align-items:flex-start}
.notice-box .ic{font-size:26px}
.notice-box h3{font-size:17px;margin-bottom:6px}
.notice-box p{color:#cbd5e1;font-size:14px}
/* cards grid */
.grid{display:grid;gap:22px}
.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:14px;padding:26px;transition:.25s;box-shadow:0 1px 3px rgba(0,0,0,.04)}
.card:hover{transform:translateY(-4px);box-shadow:0 12px 30px rgba(15,42,82,.1);border-color:#cbd5e1}
.card .ic{font-size:30px;margin-bottom:14px}
.card h3{font-size:18px;margin-bottom:10px}
.card p{color:var(--muted);font-size:14.5px}
.card .num{font-size:14px;font-weight:800;color:var(--cyan);margin-bottom:10px;display:inline-block}
/* comparison table */
.cmp{overflow-x:auto}
.cmp table{width:100%;border-collapse:collapse;background:#fff;border-radius:12px;overflow:hidden;box-shadow:0 1px 3px rgba(0,0,0,.05)}
.cmp th,.cmp td{padding:14px 16px;text-align:left;border-bottom:1px solid var(--line);font-size:14px}
.cmp th{background:var(--navy);color:#fff;font-weight:700}
.cmp tr:last-child td{border-bottom:none}
.cmp .ok{color:var(--emerald);font-weight:700}
.cmp .no{color:#f43f5e}
.cmp .me{background:#ecfeff}
/* news */
.news-tabs{display:flex;gap:10px;justify-content:center;margin-bottom:30px;flex-wrap:wrap}
.news-tabs a{padding:9px 20px;border-radius:24px;border:1px solid var(--line);color:var(--muted);font-size:14px;font-weight:600;transition:.2s}
.news-tabs a:hover,.news-tabs a.active{background:var(--cyan);color:#082f49;border-color:var(--cyan)}
.news-card{display:flex;gap:18px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;transition:.2s}
.news-card:hover{box-shadow:0 8px 24px rgba(0,0,0,.08)}
.news-card img{width:180px;height:120px;object-fit:cover;border-radius:8px;flex-shrink:0}
.news-card h3{font-size:17px;margin-bottom:8px}
.news-card .date{color:var(--muted);font-size:13px}
.news-card p{color:var(--muted);font-size:14px;margin-top:6px}
/* reviews */
.review{background:#fff;border:1px solid var(--line);border-radius:14px;padding:26px}
.review .stars{color:#f59e0b;font-size:18px;margin-bottom:10px}
.review p{color:#334155;font-size:15px;margin-bottom:14px}
.review .who{display:flex;align-items:center;gap:12px}
.review .who .ava{width:42px;height:42px;border-radius:50%;background:var(--navy);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review .who b{display:block;font-size:14px}
.review .who small{color:var(--muted);font-size:12px}
/* download */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-card{background:#fff;border:1px solid var(--line);border-radius:14px;padding:24px;text-align:center;transition:.25s}
.dl-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(0,0,0,.1)}
.dl-card .os{font-size:40px;margin-bottom:12px}
.dl-card h3{font-size:16px;margin-bottom:6px}
.dl-card small{color:var(--muted);display:block;margin-bottom:14px}
.dl-card .btn{width:100%;padding:11px;font-size:14px}
/* trust */
.trust{background:var(--dark);color:#fff}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px;text-align:center}
.trust-item .ic{font-size:34px;margin-bottom:10px}
.trust-item b{display:block;font-size:22px;margin-bottom:4px}
.trust-item span{color:#94a3b8;font-size:13px}
/* scenarios */
.scenario{display:flex;gap:16px;background:#fff;border:1px solid var(--line);border-radius:12px;padding:20px}
.scenario .ic{font-size:26px}
.scenario h3{font-size:16px;margin-bottom:6px}
.scenario p{color:var(--muted);font-size:14px}
/* faq */
.faq-item{background:#fff;border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:18px 22px;font-weight:700;font-size:16px;cursor:pointer;background:#fff}
.faq-q .arrow{color:var(--cyan);font-size:20px}
.faq-a{padding:0 22px 20px;color:#334155;font-size:15px;border-top:1px dashed var(--line);padding-top:14px}
.faq-a ol{margin-left:20px}
.faq-a li{margin-bottom:8px}
/* cta */
.cta{background:linear-gradient(135deg,#0f2a52,#0e5a6e);color:#fff;text-align:center;padding:64px 20px}
.cta h2{font-size:30px;font-weight:800;margin-bottom:14px}
.cta p{color:#cbd5e1;max-width:560px;margin:0 auto 26px}
/* footer */
footer{background:#0b1220;color:#94a3b8;padding:50px 0 24px;font-size:14px}
.foot-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:30px;margin-bottom:30px}
.foot-grid h4{color:#fff;font-size:15px;margin-bottom:14px}
.foot-grid a{display:block;color:#94a3b8;margin-bottom:8px;transition:.2s}
.foot-grid a:hover{color:#67e8f9}
.foot-brand p{color:#94a3b8;margin-top:10px;font-size:13px}
.friend{display:flex;flex-wrap:wrap;gap:8px 18px;padding:16px 0;border-top:1px solid #1e293b;border-bottom:1px solid #1e293b;margin-bottom:18px}
.friend a{color:#64748b;font-size:12.5px}
.friend a:hover{color:#67e8f9}
.foot-bottom{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:10px;font-size:12.5px;color:#64748b}
/* breadcrumb */
.crumb{background:#fff;border-bottom:1px solid var(--line);padding:12px 0;font-size:13px;color:var(--muted)}
.crumb a{color:var(--muted)}
.crumb a:hover{color:var(--cyan)}
.crumb .sep{margin:0 8px;color:#cbd5e1}
/* article */
.article{background:#fff}
.article-hero{padding:36px 0 20px;border-bottom:1px solid var(--line);margin-bottom:30px}
.article-hero h1{font-size:30px;font-weight:800;line-height:1.35;margin-bottom:14px}
.article-meta{display:flex;gap:16px;flex-wrap:wrap;color:var(--muted);font-size:13px;align-items:center}
.article-meta .tag{background:#ecfeff;color:#0e7490;padding:3px 10px;border-radius:12px;font-weight:600}
.article-body{display:grid;grid-template-columns:1fr 300px;gap:40px;padding-bottom:50px}
.article-main h2{font-size:22px;font-weight:800;margin:28px 0 14px;color:var(--navy)}
.article-main p{color:#334155;font-size:16px;margin-bottom:16px}
.article-main img{margin:18px 0;border-radius:10px}
.article-main table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.article-main th,.article-main td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article-main th{background:var(--navy);color:#fff}
.article-main blockquote{border-left:4px solid var(--cyan);background:#f0f9ff;padding:14px 18px;margin:18px 0;color:#0f2a52;border-radius:0 8px 8px 0}
.aside h3{font-size:17px;font-weight:800;margin-bottom:16px;padding-bottom:10px;border-bottom:2px solid var(--cyan)}
.aside .hot{margin-bottom:8px}
.aside .hot a{display:block;padding:10px 0;border-bottom:1px dashed var(--line);color:#334155;font-size:14px;font-weight:600}
.aside .hot a:hover{color:var(--cyan)}
.aside .cats a{display:inline-block;background:#f1f5f9;color:#475569;padding:5px 12px;border-radius:14px;font-size:13px;margin:0 6px 8px 0}
.comment-list{list-style:none;margin-top:14px}
.comment-list li{background:#f8fafc;border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:12px}
.comment-list b{display:block;font-size:14px;margin-bottom:4px}
.comment-list p{color:#475569;font-size:14px;margin:0}
.pager{display:flex;justify-content:space-between;gap:14px;margin-top:30px;flex-wrap:wrap}
.pager a{flex:1;min-width:200px;background:#f1f5f9;border:1px solid var(--line);border-radius:10px;padding:14px 16px;font-size:14px}
.pager a:hover{border-color:var(--cyan)}
.pager a small{display:block;color:var(--muted);font-size:12px;margin-bottom:4px}
.related{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:30px}
/* 404 */
.err{min-height:70vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 20px}
.err h1{font-size:90px;font-weight:900;color:var(--navy);line-height:1}
.err h2{font-size:26px;margin:16px 0 10px}
.err p{color:var(--muted);margin-bottom:24px}
/* sitemap */
.sitemap h2{margin:30px 0 16px;font-size:22px;font-weight:800;color:var(--navy);border-left:4px solid var(--cyan);padding-left:12px}
.sitemap .links{columns:2;column-gap:30px}
.sitemap .links a{display:block;padding:7px 0;border-bottom:1px dashed var(--line);color:#334155}
.sitemap .links a:hover{color:var(--cyan)}
/* responsive */
@media(max-width:960px){
.hero-grid{grid-template-columns:1fr}
.grid-3,.grid-2{grid-template-columns:1fr 1fr}
.dl-grid{grid-template-columns:repeat(2,1fr)}
.trust-grid{grid-template-columns:repeat(2,1fr)}
.article-body{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr 1fr}
.related{grid-template-columns:1fr}
}
@media(max-width:640px){
.nav{height:auto;padding:12px 0;flex-wrap:wrap}
.nav-links{width:100%;justify-content:flex-start}
.hero h1{font-size:28px}
.grid-3,.grid-2,.dl-grid,.trust-grid{grid-template-columns:1fr}
.foot-grid{grid-template-columns:1fr}
.news-card{flex-direction:column}
.news-card img{width:100%;height:auto}
.sitemap .links{columns:1}
}