:root{--gold:#f59e0b;--gold-dark:#d97706;--gold-light:#fbbf24;--navy:#0f172a;--navy-2:#1e293b;--slate:#334155;--muted:#64748b;--line:#e2e8f0;--bg:#ffffff;--bg-soft:#f8fafc;--cyan:#0ea5e9;--green:#16a34a;--radius:16px;--shadow:0 10px 30px rgba(15,23,42,.08)}
*{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",Arial,sans-serif;color:var(--navy-2);background:var(--bg);line-height:1.75;font-size:16px;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
.container{max-width:1180px;margin:0 auto;padding:0 20px}
.skip{position:absolute;left:-9999px;top:0;background:var(--gold);color:#fff;padding:8px 14px;z-index:100}
.skip:focus{left:0}
/* Navbar */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:22px;color:var(--navy)}
.brand img{width:34px;height:34px;border-radius:8px}
.brand span b{color:var(--gold-dark)}
.nav-links{display:flex;align-items:center;gap:28px;font-size:15px;font-weight:600}
.nav-links a{color:var(--slate);transition:.2s}
.nav-links a:hover{color:var(--gold-dark)}
.nav-cta{background:var(--gold);color:#fff;padding:9px 20px;border-radius:999px;font-weight:700}
.nav-cta:hover{background:var(--gold-dark)}
/* Hero */
.hero{background:radial-gradient(1200px 600px at 80% -10%,rgba(245,158,11,.18),transparent 60%),linear-gradient(180deg,#0f172a 0%,#1e293b 100%);color:#fff;padding:64px 0 80px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.hero h1{font-size:44px;line-height:1.2;font-weight:900;margin-bottom:18px}
.hero h1 .hl{color:var(--gold-light)}
.hero p.lead{font-size:18px;color:#cbd5e1;margin-bottom:26px;max-width:520px}
.hero-badges{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:28px}
.hero-badges span{background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.15);padding:6px 14px;border-radius:999px;font-size:13px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 28px;border-radius:12px;font-weight:700;font-size:16px;transition:.2s;border:0;cursor:pointer}
.btn-gold{background:var(--gold);color:#fff;box-shadow:0 8px 20px rgba(245,158,11,.35)}
.btn-gold:hover{background:var(--gold-dark);transform:translateY(-2px)}
.btn-ghost{background:rgba(255,255,255,.1);color:#fff;border:1px solid rgba(255,255,255,.25)}
.btn-ghost:hover{background:rgba(255,255,255,.2)}
.btn-outline{background:#fff;color:var(--navy);border:1px solid var(--line)}
.btn-outline:hover{border-color:var(--gold);color:var(--gold-dark)}
/* Client simulator */
.sim{background:linear-gradient(180deg,#1e293b,#0f172a);border:1px solid rgba(255,255,255,.12);border-radius:18px;box-shadow:0 30px 60px rgba(0,0,0,.4);overflow:hidden}
.sim-bar{display:flex;align-items:center;gap:8px;padding:12px 16px;border-bottom:1px solid rgba(255,255,255,.1);background:rgba(255,255,255,.04)}
.sim-bar .dot{width:12px;height:12px;border-radius:50%}
.sim-bar .d1{background:#f87171}.sim-bar .d2{background:#fbbf24}.sim-bar .d3{background:#34d399}
.sim-bar .title{font-size:12px;color:#94a3b8;margin-left:10px}
.sim-body{padding:24px}
.sim-logo{display:flex;align-items:center;gap:12px;margin-bottom:20px}
.sim-logo .ic{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#f59e0b,#d97706);display:flex;align-items:center;justify-content:center;font-size:24px}
.sim-logo .nm{font-weight:800;font-size:18px}
.sim-logo .st{margin-left:auto;background:rgba(52,211,153,.15);color:#34d399;font-size:12px;padding:4px 10px;border-radius:999px}
.sim-connect{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;border-radius:14px;padding:18px;display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.sim-connect .big{font-size:26px;font-weight:900;letter-spacing:1px}
.sim-connect .sub{font-size:13px;opacity:.9}
.sim-row{display:flex;justify-content:space-between;align-items:center;padding:12px 0;border-bottom:1px solid rgba(255,255,255,.07);font-size:14px;color:#cbd5e1}
.sim-row .k{color:#94a3b8}
.sim-row .v{font-weight:700;color:#fff}
.sim-node{display:flex;align-items:center;gap:10px}
.sim-node .flag{width:26px;height:26px;border-radius:50%;background:linear-gradient(135deg,#38bdf8,#0ea5e9);display:flex;align-items:center;justify-content:center;font-size:13px}
.sim-meter{height:8px;background:rgba(255,255,255,.1);border-radius:99px;overflow:hidden;margin-top:14px}
.sim-meter i{display:block;height:100%;width:76%;background:linear-gradient(90deg,#34d399,#fbbf24);border-radius:99px}
/* Announcement */
.notice{background:var(--bg-soft);border:1px solid var(--line);border-radius:var(--radius);padding:18px 22px;margin:-40px auto 0;position:relative;z-index:2;display:flex;gap:14px;align-items:center;flex-wrap:wrap}
.notice .tag{background:var(--gold);color:#fff;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:700;white-space:nowrap}
.notice p{flex:1;font-size:15px;color:var(--slate)}
/* Section */
.section{padding:72px 0}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head .eyebrow{color:var(--gold-dark);font-weight:700;font-size:14px;letter-spacing:1px;text-transform:uppercase}
.sec-head h2{font-size:34px;font-weight:900;margin:8px 0 12px}
.sec-head p{color:var(--muted);max-width:640px;margin:0 auto}
/* Features */
.grid-6{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.card{background:var(--bg);border:1px solid var(--line);border-radius:var(--radius);padding:26px;transition:.25s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--gold-light)}
.card .ic{width:52px;height:52px;border-radius:14px;background:linear-gradient(135deg,#fef3c7,#fde68a);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:16px}
.card h3{font-size:19px;font-weight:800;margin-bottom:10px}
.card p{color:var(--muted);font-size:15px}
/* Compare */
.compare{overflow-x:auto}
.compare table{width:100%;border-collapse:collapse;min-width:720px;font-size:15px}
.compare th,.compare td{padding:14px 16px;text-align:center;border-bottom:1px solid var(--line)}
.compare th{background:var(--navy);color:#fff;font-weight:700}
.compare th:first-child,.compare td:first-child{text-align:left}
.compare tr:last-child td{border-bottom:0}
.compare .yes{color:var(--green);font-weight:700}
.compare .no{color:#dc2626}
.compare .hl-row td{background:#fffbeb}
/* News tabs */
.tabs{display:flex;gap:8px;justify-content:center;margin-bottom:32px;flex-wrap:wrap}
.tabs a{padding:9px 22px;border-radius:999px;font-weight:700;font-size:15px;border:1px solid var(--line);color:var(--slate);transition:.2s}
.tabs a.active,.tabs a:hover{background:var(--gold);border-color:var(--gold);color:#fff}
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.news-card{border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;transition:.25s;background:#fff}
.news-card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.news-card img{width:100%;height:160px;object-fit:cover}
.news-card .body{padding:18px}
.news-card .meta{font-size:12px;color:var(--muted);margin-bottom:8px}
.news-card h3{font-size:17px;font-weight:800;line-height:1.4;margin-bottom:8px}
.news-card h3 a:hover{color:var(--gold-dark)}
.news-card p{font-size:14px;color:var(--muted)}
/* Reviews */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review{border:1px solid var(--line);border-radius:var(--radius);padding:24px}
.review .stars{color:var(--gold);font-size:16px;margin-bottom:12px}
.review p{color:var(--slate);font-size:15px;margin-bottom:16px}
.review .user{display:flex;align-items:center;gap:12px}
.review .user .ava{width:40px;height:40px;border-radius:50%;background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700}
.review .user b{font-size:14px;display:block}
.review .user span{font-size:12px;color:var(--muted)}
/* Download */
.dl-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:18px}
.dl-item{border:1px solid var(--line);border-radius:var(--radius);padding:26px 16px;text-align:center;transition:.25s}
.dl-item:hover{transform:translateY(-4px);box-shadow:var(--shadow);border-color:var(--gold-light)}
.dl-item .ic{font-size:40px;margin-bottom:12px}
.dl-item h3{font-size:16px;font-weight:800;margin-bottom:4px}
.dl-item p{font-size:12px;color:var(--muted);margin-bottom:16px}
.dl-item a{display:inline-block;background:var(--gold);color:#fff;padding:9px 22px;border-radius:999px;font-weight:700;font-size:14px}
.dl-item a:hover{background:var(--gold-dark)}
/* Trust */
.trust{display:flex;gap:24px;justify-content:center;flex-wrap:wrap;text-align:center}
.trust .item{flex:1;min-width:150px;max-width:200px;padding:22px;border:1px solid var(--line);border-radius:var(--radius)}
.trust .num{font-size:30px;font-weight:900;color:var(--gold-dark)}
.trust .lbl{font-size:14px;color:var(--muted)}
/* Scenarios */
.scene-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.scene{border:1px solid var(--line);border-radius:var(--radius);padding:22px;transition:.2s}
.scene:hover{border-color:var(--gold-light)}
.scene .ic{font-size:30px;margin-bottom:10px}
.scene h3{font-size:16px;font-weight:800;margin-bottom:6px}
.scene p{font-size:13px;color:var(--muted)}
/* FAQ */
.faq-wrap{max-width:800px;margin:0 auto}
.faq-item{border:1px solid var(--line);border-radius:12px;margin-bottom:14px;overflow:hidden;background:#fff}
.faq-item summary{padding:18px 22px;font-weight:700;font-size:16px;cursor:pointer;list-style:none;display:flex;justify-content:space-between;align-items:center;background:var(--bg-soft)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"+";font-size:22px;color:var(--gold-dark);font-weight:700}
.faq-item[open] summary::after{content:"−"}
.faq-item .faq-body{padding:20px 22px;border-top:1px solid var(--line)}
.faq-body ol{margin-left:20px}
.faq-body li{margin-bottom:12px;color:var(--slate)}
.faq-body li b{color:var(--navy)}
/* CTA */
.cta{background:linear-gradient(135deg,#f59e0b,#d97706);color:#fff;border-radius:24px;padding:56px 40px;text-align:center}
.cta h2{font-size:32px;font-weight:900;margin-bottom:12px}
.cta p{opacity:.95;margin-bottom:24px}
.cta .btn{background:#fff;color:var(--gold-dark)}
.cta .btn:hover{transform:translateY(-2px)}
/* Footer */
.footer{background:var(--navy);color:#cbd5e1;padding:56px 0 0;margin-top:0}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;padding-bottom:40px}
.footer h4{color:#fff;font-size:16px;margin-bottom:16px}
.footer a{display:block;color:#94a3b8;font-size:14px;margin-bottom:10px;transition:.2s}
.footer a:hover{color:var(--gold-light)}
.footer .brand{color:#fff}
.footer .desc{font-size:14px;color:#94a3b8;margin:14px 0 18px;max-width:320px}
.footer-bottom{border-top:1px solid rgba(255,255,255,.1);padding:20px 0;text-align:center;font-size:13px;color:#64748b}
.footer-bottom a{color:#94a3b8;margin:0 8px}
/* Breadcrumb */
.breadcrumb{font-size:13px;color:var(--muted);padding:18px 0;border-bottom:1px solid var(--line)}
.breadcrumb a{color:var(--gold-dark)}
.breadcrumb a:hover{text-decoration:underline}
.breadcrumb span{margin:0 6px;color:#cbd5e1}
/* Page hero */
.page-hero{background:linear-gradient(180deg,#0f172a,#1e293b);color:#fff;padding:52px 0;text-align:center}
.page-hero h1{font-size:36px;font-weight:900;margin-bottom:10px}
.page-hero p{color:#cbd5e1;max-width:640px;margin:0 auto}
/* Article */
.article-layout{display:grid;grid-template-columns:1fr 300px;gap:36px;padding:40px 0}
.article h1{font-size:30px;font-weight:900;line-height:1.35;margin-bottom:14px}
.article .meta{font-size:14px;color:var(--muted);margin-bottom:24px;padding-bottom:18px;border-bottom:1px solid var(--line)}
.article .meta b{color:var(--gold-dark)}
.article img{width:100%;border-radius:14px;margin:18px 0}
.article h2{font-size:22px;font-weight:800;margin:32px 0 14px;padding-left:12px;border-left:4px solid var(--gold)}
.article p{color:var(--slate);margin-bottom:16px}
.article table{width:100%;border-collapse:collapse;margin:18px 0;font-size:14px}
.article table th,.article table td{border:1px solid var(--line);padding:10px 12px;text-align:left}
.article table th{background:var(--bg-soft)}
.article blockquote{border-left:4px solid var(--gold);background:var(--bg-soft);padding:14px 18px;margin:18px 0;color:var(--slate);border-radius:0 8px 8px 0}
.article .toc{background:var(--bg-soft);border:1px solid var(--line);border-radius:12px;padding:18px 22px;margin-bottom:24px}
.article .toc b{display:block;margin-bottom:10px}
.article .toc a{display:block;color:var(--gold-dark);font-size:14px;margin-bottom:6px}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin:32px 0;padding:18px 0;border-top:1px solid var(--line)}
.article-nav a{color:var(--gold-dark);font-size:14px;font-weight:600}
/* Sidebar */
.sidebar .widget{border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin-bottom:22px}
.sidebar h3{font-size:17px;font-weight:800;margin-bottom:14px;padding-bottom:10px;border-bottom:2px solid var(--gold)}
.sidebar .hot-item{display:flex;gap:10px;margin-bottom:14px;align-items:flex-start}
.sidebar .hot-item .n{background:var(--gold);color:#fff;width:22px;height:22px;border-radius:6px;font-size:12px;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-weight:700}
.sidebar .hot-item a{font-size:14px;line-height:1.45;color:var(--slate)}
.sidebar .hot-item a:hover{color:var(--gold-dark)}
.sidebar .cat a{display:block;padding:9px 12px;border:1px solid var(--line);border-radius:8px;margin-bottom:8px;font-size:14px;color:var(--slate)}
.sidebar .cat a:hover{border-color:var(--gold);color:var(--gold-dark)}
/* Related */
.related{margin:32px 0;padding-top:32px;border-top:1px solid var(--line)}
.related h3{font-size:20px;font-weight:800;margin-bottom:20px}
/* Comments */
.comments{border:1px solid var(--line);border-radius:var(--radius);padding:20px;margin:24px 0}
.comments h3{font-size:18px;font-weight:800;margin-bottom:16px}
.c-item{padding:14px 0;border-bottom:1px solid var(--line)}
.c-item:last-child{border-bottom:0}
.c-item .u{display:flex;align-items:center;gap:10px;margin-bottom:6px}
.c-item .u .ava{width:34px;height:34px;border-radius:50%;background:linear-gradient(135deg,#0ea5e9,#38bdf8);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:13px}
.c-item .u b{font-size:14px}
.c-item .u span{font-size:12px;color:var(--muted);margin-left:auto}
.c-item p{font-size:14px;color:var(--slate)}
/* Sitemap */
.sitemap-list{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.sitemap-list a{display:block;padding:14px 16px;border:1px solid var(--line);border-radius:10px;font-size:14px;color:var(--slate)}
.sitemap-list a:hover{border-color:var(--gold);color:var(--gold-dark)}
/* 404 */
.err{min-height:60vh;display:flex;align-items:center;justify-content:center;text-align:center}
.err .code{font-size:120px;font-weight:900;color:var(--gold);line-height:1}
.err h1{font-size:28px;margin:10px 0}
.err p{color:var(--muted);margin-bottom:24px}
/* Responsive */
@media(max-width:960px){.hero-inner{grid-template-columns:1fr}.nav-links{display:none}.grid-6,.grid-3,.news-grid,.scene-grid{grid-template-columns:repeat(2,1fr)}.dl-grid{grid-template-columns:repeat(2,1fr)}.article-layout{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}.sitemap-list{grid-template-columns:1fr}}
@media(max-width:560px){.grid-6,.grid-3,.news-grid,.scene-grid,.dl-grid{grid-template-columns:1fr}.hero h1{font-size:32px}.sec-head h2{font-size:26px}}