:root{--p:#4F46E5;--p2:#7C3AED;--c1:#06B6D4;--c2:#3B82F6;--a1:#F59E0B;--a2:#EC4899;--dark:#0B0F1E;--dark2:#111827;--dark3:#1A2233;--light:#F8FAFC;--light2:#FFFFFF;--txt:#0F172A;--txt2:#475569;--muted:#94A3B8;--bd:rgba(255,255,255,.08);--bd2:#E2E8F0;--r:18px;--r2:12px;--sh:0 10px 40px rgba(15,23,42,.12);--sh2:0 20px 60px rgba(79,70,229,.25)}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;color:var(--txt);background:var(--light);line-height:1.7;overflow-x:hidden}
a{text-decoration:none;color:inherit}
ul{list-style:none}
img{max-width:100%;display:block}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:96px 0}
.section.dark{background:var(--dark);color:#E2E8F0}
.section.light{background:var(--light);color:var(--txt)}
.section.mid{background:var(--dark2);color:#E2E8F0}
.section-head{text-align:center;margin-bottom:56px}
.section-head .kicker{display:inline-block;padding:6px 16px;border-radius:999px;font-size:13px;font-weight:600;color:var(--p);background:rgba(79,70,229,.1);margin-bottom:16px;letter-spacing:.5px}
.section-head h2{font-size:38px;font-weight:800;line-height:1.25;margin-bottom:14px}
.section-head p{font-size:16px;color:var(--txt2);max-width:640px;margin:0 auto}
.dark .section-head p{color:var(--muted)}
.grad-text{background:linear-gradient(120deg,#4F46E5,#7C3AED 45%,#06B6D4);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.dark .grad-text{background:linear-gradient(120deg,#818CF8,#A78BFA 45%,#22D3EE);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.btn{display:inline-flex;align-items:center;gap:8px;padding:14px 30px;border-radius:999px;font-weight:700;font-size:15px;cursor:pointer;border:none;transition:transform .25s ease,box-shadow .25s ease;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--p),var(--p2));color:#fff;box-shadow:0 8px 24px rgba(79,70,229,.4)}
.btn-primary:hover{transform:scale(1.05);box-shadow:0 12px 32px rgba(79,70,229,.55)}
.btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.18);backdrop-filter:blur(8px)}
.btn-ghost:hover{transform:scale(1.05);background:rgba(255,255,255,.16)}
.btn-outline{background:transparent;color:var(--p);border:1.5px solid var(--p)}
.btn-outline:hover{transform:scale(1.05);box-shadow:0 8px 20px rgba(79,70,229,.25)}
.btn-lg{padding:16px 36px;font-size:16px}
/* nav */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;transition:background .4s ease,box-shadow .4s ease,backdrop-filter .4s ease;background:transparent;backdrop-filter:blur(0)}
.nav.scrolled{background:rgba(11,15,30,.78);backdrop-filter:blur(16px);box-shadow:0 4px 24px rgba(0,0,0,.25)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.nav-logo{display:flex;align-items:center;gap:10px;font-size:20px;font-weight:800;color:#fff}
.nav-logo img{height:38px;width:38px;border-radius:9px}
.nav-menu{display:flex;align-items:center;gap:28px}
.nav-menu a{color:rgba(255,255,255,.82);font-size:14px;font-weight:500;transition:color .25s}
.nav-menu a:hover{color:#fff}
.nav-cta{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;flex-direction:column;gap:5px}
.nav-toggle span{display:block;width:26px;height:2px;background:#fff;border-radius:2px;transition:.3s}
/* hero */
.hero{position:relative;background:radial-gradient(ellipse at 20% 10%,#1E1B4B 0%,transparent 55%),radial-gradient(ellipse at 80% 20%,#0E7490 0%,transparent 50%),linear-gradient(160deg,#0B0F1E 0%,#111827 60%,#0B0F1E 100%);color:#fff;padding:150px 0 110px;overflow:hidden}
.hero .container{position:relative;z-index:5}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:56px;align-items:center}
.hero-badge{display:inline-flex;align-items:center;gap:8px;padding:7px 16px;border-radius:999px;background:rgba(79,70,229,.2);border:1px solid rgba(129,140,248,.4);font-size:13px;font-weight:600;color:#C7D2FE;margin-bottom:22px}
.hero-badge .dot{width:8px;height:8px;border-radius:50%;background:#34D399;box-shadow:0 0 12px #34D399;animation:pulse 1.6s infinite}
.hero h1{font-size:56px;font-weight:900;line-height:1.15;margin-bottom:22px;letter-spacing:-.5px}
.hero-sub{font-size:18px;color:#CBD5E1;max-width:520px;margin-bottom:32px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap;margin-bottom:36px}
.hero-meta{display:flex;gap:28px;flex-wrap:wrap}
.hero-meta .m{display:flex;flex-direction:column}
.hero-meta .m b{font-size:22px;font-weight:800}
.hero-meta .m span{font-size:13px;color:#94A3B8}
.particles{position:absolute;inset:0;pointer-events:none}
.particle{position:absolute;bottom:-20px;border-radius:50%;background:rgba(129,140,248,.5);animation:floatUp linear infinite;opacity:.5}
/* simulator */
.sim-wrap{display:flex;justify-content:center}
.simulator{width:300px;background:#fff;border-radius:34px;box-shadow:0 30px 80px rgba(0,0,0,.45);overflow:hidden;animation:floaty 5s ease-in-out infinite;border:1px solid rgba(255,255,255,.15)}
.sim-top{background:linear-gradient(135deg,#1E1B4B,#312E81);padding:18px 20px;color:#fff;display:flex;align-items:center;gap:10px}
.sim-top .s-logo{width:28px;height:28px;border-radius:7px;background:linear-gradient(135deg,#4F46E5,#7C3AED);display:flex;align-items:center;justify-content:center;font-weight:800;font-size:13px}
.sim-top .s-name{font-size:15px;font-weight:700}
.sim-top .s-status{margin-left:auto;font-size:11px;color:#34D399;display:flex;align-items:center;gap:5px}
.sim-body{padding:22px 20px;color:#0F172A}
.sim-ring{display:flex;justify-content:center;margin:12px 0 18px;position:relative}
.ring{width:120px;height:120px;border-radius:50%;position:relative;display:flex;align-items:center;justify-content:center}
.ring::before{content:"";position:absolute;inset:0;border-radius:50%;border:6px solid #EEF2FF}
.ring::after{content:"";position:absolute;inset:0;border-radius:50%;border:6px solid transparent;border-top-color:#4F46E5;border-right-color:#7C3AED;animation:spin 1.4s linear infinite}
.ring .val{font-size:26px;font-weight:800;color:#4F46E5}
.ring .val span{font-size:11px;color:#64748B;display:block;text-align:center;font-weight:500}
.ring-pulse{position:absolute;inset:0;border-radius:50%;background:rgba(79,70,229,.25);animation:pulseRing 2s infinite}
.sim-selector{background:#F1F5F9;border-radius:12px;padding:12px 14px;margin-bottom:14px}
.sim-selector .label{font-size:12px;color:#64748B;margin-bottom:8px}
.sim-node{display:flex;align-items:center;gap:8px;padding:10px 12px;background:#fff;border-radius:9px;box-shadow:0 2px 8px rgba(0,0,0,.05);margin-bottom:6px;font-size:13px;font-weight:600;cursor:pointer}
.sim-node.active{border:1.5px solid #4F46E5;color:#4F46E5}
.sim-node .flag{width:22px;height:22px;border-radius:50%;background:linear-gradient(135deg,#06B6D4,#3B82F6);display:flex;align-items:center;justify-content:center;font-size:10px;color:#fff}
.sim-btn{width:100%;padding:13px;border:none;border-radius:12px;background:linear-gradient(135deg,#4F46E5,#7C3AED);color:#fff;font-weight:700;font-size:14px;cursor:pointer;transition:transform .25s}
.sim-btn:hover{transform:scale(1.03)}
.sim-stats{display:flex;gap:12px;margin-top:16px}
.sim-stats .st{flex:1;text-align:center;background:#F8FAFC;border-radius:10px;padding:10px 6px}
.sim-stats .st b{font-size:15px;color:#0F172A}
.sim-stats .st span{display:block;font-size:10px;color:#94A3B8}
/* trust bar */
.trust{background:#fff;padding:40px 0;border-bottom:1px solid #EEF2F7}
.trust-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;flex-wrap:wrap}
.trust-item{display:flex;align-items:center;gap:10px;color:#475569;font-size:14px;font-weight:600}
.trust-item .ic{width:38px;height:38px;border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:18px}
/* stats */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{background:var(--dark3);border:1px solid var(--bd);border-radius:var(--r);padding:30px;text-align:center;transition:transform .3s,box-shadow .3s}
.stat-card:hover{transform:translateY(-6px);box-shadow:0 16px 40px rgba(79,70,229,.25)}
.stat-card .num{font-size:40px;font-weight:900;background:linear-gradient(120deg,#818CF8,#22D3EE);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-card .lbl{font-size:14px;color:var(--muted);margin-top:6px}
/* advantage */
.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px}
.adv-card{background:#fff;border-radius:var(--r);padding:34px 28px;box-shadow:var(--sh);border:1px solid #EEF2F7;transition:transform .3s,box-shadow .3s}
.adv-card:hover{transform:translateY(-8px);box-shadow:var(--sh2)}
.adv-card .ic{width:58px;height:58px;border-radius:16px;display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:20px;color:#fff}
.adv-card h3{font-size:20px;font-weight:700;margin-bottom:12px}
.adv-card p{font-size:15px;color:var(--txt2)}
.g1{background:linear-gradient(135deg,#4F46E5,#7C3AED)}
.g2{background:linear-gradient(135deg,#06B6D4,#3B82F6)}
.g3{background:linear-gradient(135deg,#F59E0B,#EC4899)}
/* features */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feat-card{background:var(--dark3);border:1px solid var(--bd);border-radius:var(--r);padding:28px;transition:transform .3s,box-shadow .3s}
.feat-card:hover{transform:translateY(-8px);box-shadow:0 18px 44px rgba(0,0,0,.4)}
.feat-card .ic{width:50px;height:50px;border-radius:13px;display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:18px;color:#fff;transition:transform .4s}
.feat-card:hover .ic{transform:rotate(8deg)}
.feat-card h3{font-size:18px;font-weight:700;color:#fff;margin-bottom:10px}
.feat-card p{font-size:14px;color:var(--muted)}
/* tech */
.tech-list{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.tech-item{display:flex;gap:16px;background:#fff;border-radius:var(--r2);padding:22px;box-shadow:var(--sh);border:1px solid #EEF2F7;transition:transform .3s}
.tech-item:hover{transform:translateX(6px)}
.tech-item .num{width:44px;height:44px;border-radius:12px;background:linear-gradient(135deg,#4F46E5,#7C3AED);color:#fff;font-weight:800;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.tech-item h4{font-size:16px;font-weight:700;margin-bottom:6px}
.tech-item p{font-size:14px;color:var(--txt2)}
/* scenarios */
.sc-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.sc-card{background:var(--dark3);border:1px solid var(--bd);border-radius:var(--r);padding:28px;text-align:center;transition:transform .3s,box-shadow .3s}
.sc-card:hover{transform:translateY(-8px);box-shadow:0 16px 40px rgba(0,0,0,.4)}
.sc-card .ic{width:56px;height:56px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:24px;margin:0 auto 16px;color:#fff}
.sc-card h3{font-size:17px;font-weight:700;color:#fff;margin-bottom:8px}
.sc-card p{font-size:13px;color:var(--muted)}
/* pricing */
.price-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;align-items:stretch}
.price-card{background:#fff;border-radius:var(--r);padding:36px 30px;box-shadow:var(--sh);border:1.5px solid #EEF2F7;position:relative;display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s}
.price-card:hover{transform:translateY(-8px);box-shadow:var(--sh2)}
.price-card.hot{border-color:#4F46E5;box-shadow:0 20px 60px rgba(79,70,229,.2)}
.price-card .tag{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:linear-gradient(135deg,#4F46E5,#7C3AED);color:#fff;font-size:12px;font-weight:700;padding:4px 16px;border-radius:999px}
.price-card h3{font-size:18px;font-weight:700;margin-bottom:6px}
.price-card .desc{font-size:13px;color:var(--txt2);margin-bottom:20px}
.price-card .price{font-size:42px;font-weight:900;color:#0F172A}
.price-card .price small{font-size:14px;font-weight:500;color:#94A3B8}
.price-card ul{margin:22px 0 28px;flex:1}
.price-card ul li{font-size:14px;color:#475569;padding:8px 0;border-bottom:1px dashed #EEF2F7;display:flex;align-items:center;gap:8px}
.price-card ul li::before{content:"✓";color:#4F46E5;font-weight:700}
/* news */
.news-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.news-card{background:#fff;border-radius:var(--r);overflow:hidden;box-shadow:var(--sh);border:1px solid #EEF2F7;transition:transform .3s,box-shadow .3s}
.news-card:hover{transform:translateY(-8px);box-shadow:var(--sh2)}
.news-card img{width:100%;height:170px;object-fit:cover}
.news-card .body{padding:20px}
.news-card .meta{font-size:12px;color:var(--muted);margin-bottom:10px;display:flex;gap:12px}
.news-card h3{font-size:16px;font-weight:700;margin-bottom:10px;line-height:1.4}
.news-card h3 a:hover{color:var(--p)}
.news-card p{font-size:13px;color:var(--txt2);line-height:1.6}
/* testimonial */
.testi-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.testi-card{background:var(--dark3);border:1px solid var(--bd);border-radius:var(--r);padding:28px}
.testi-card .stars{color:#F59E0B;font-size:16px;margin-bottom:14px}
.testi-card p{font-size:14px;color:#CBD5E1;line-height:1.7;margin-bottom:18px}
.testi-card .user{display:flex;align-items:center;gap:12px}
.testi-card .avatar{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,#06B6D4,#3B82F6);display:flex;align-items:center;justify-content:center;font-weight:700;color:#fff}
.testi-card .user b{display:block;font-size:14px;color:#fff}
.testi-card .user span{font-size:12px;color:var(--muted)}
/* faq */
.faq-list{max-width:800px;margin:0 auto}
.faq-item{background:#fff;border-radius:var(--r2);margin-bottom:14px;box-shadow:0 2px 12px rgba(15,23,42,.06);border:1px solid #EEF2F7;overflow:hidden}
.faq-item summary{list-style:none;cursor:pointer;padding:20px 24px;font-weight:700;font-size:16px;display:flex;justify-content:space-between;align-items:center;gap:16px}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary .arrow{transition:transform .3s;color:#94A3B8;flex-shrink:0}
.faq-item[open] summary .arrow{transform:rotate(180deg)}
.faq-item .ans{padding:0 24px 20px;color:var(--txt2);font-size:14px;line-height:1.8}
/* cta */
.cta{background:radial-gradient(ellipse at 50% 0%,#312E81 0%,transparent 60%),linear-gradient(160deg,#111827,#0B0F1E);color:#fff;text-align:center}
.cta h2{font-size:40px;font-weight:900;margin-bottom:16px}
.cta p{font-size:17px;color:#CBD5E1;max-width:600px;margin:0 auto 32px}
.cta .btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
/* footer */
.footer{background:#070A14;color:#94A3B8;padding:60px 0 30px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:40px;margin-bottom:40px}
.footer-brand img{height:40px;width:40px;border-radius:9px;margin-bottom:14px}
.footer-brand .name{font-size:20px;font-weight:800;color:#fff;margin-bottom:10px}
.footer-brand p{font-size:13px;line-height:1.7}
.footer h4{font-size:15px;font-weight:700;color:#fff;margin-bottom:16px}
.footer ul li{margin-bottom:10px}
.footer ul li a{font-size:13px;color:#94A3B8;transition:color .25s}
.footer ul li a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding-top:24px;text-align:center;font-size:12px}
/* breadcrumb */
.crumb{background:var(--dark);color:#94A3B8;padding:96px 0 20px}
.crumb nav ol{display:flex;align-items:center;gap:8px;font-size:13px;flex-wrap:wrap}
.crumb nav ol li a{color:#94A3B8;transition:color .25s}
.crumb nav ol li a:hover{color:#fff}
.crumb nav ol li.sep{color:#475569}
.crumb nav ol li.current{color:#fff;font-weight:700}
/* page hero (subpages) */
.page-hero{background:radial-gradient(ellipse at 30% 0%,#1E1B4B 0%,transparent 55%),linear-gradient(160deg,#0B0F1E,#111827);color:#fff;padding:150px 0 60px;text-align:center}
.page-hero h1{font-size:44px;font-weight:900;margin-bottom:14px}
.page-hero p{font-size:17px;color:#CBD5E1;max-width:640px;margin:0 auto}
/* article */
.article-body{max-width:820px;margin:0 auto}
.article-head{text-align:center;margin-bottom:36px}
.article-head h1{font-size:34px;font-weight:900;line-height:1.3;margin-bottom:16px}
.article-head .meta{color:#94A3B8;font-size:13px;display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.article-body h2{font-size:24px;font-weight:800;margin:36px 0 16px;color:#0F172A}
.article-body p{font-size:16px;color:#334155;margin-bottom:18px;line-height:1.9}
.article-body img{width:100%;border-radius:var(--r);margin:24px 0}
.article-nav{display:flex;justify-content:space-between;gap:16px;margin-top:48px;padding-top:24px;border-top:1px solid #EEF2F7}
.article-nav a{color:var(--p);font-weight:600;font-size:14px}
/* responsive */
@media(max-width:992px){.hero-grid{grid-template-columns:1fr;gap:40px}.hero h1{font-size:42px}.stats-grid{grid-template-columns:repeat(2,1fr)}.adv-grid{grid-template-columns:repeat(2,1fr)}.feat-grid{grid-template-columns:repeat(2,1fr)}.sc-grid{grid-template-columns:repeat(2,1fr)}.price-grid{grid-template-columns:1fr}.news-grid{grid-template-columns:repeat(2,1fr)}.testi-grid{grid-template-columns:repeat(2,1fr)}.tech-list{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr 1fr}}
@media(max-width:768px){.section{padding:64px 0}.section-head h2{font-size:30px}.nav-menu{position:fixed;top:70px;left:0;right:0;background:rgba(11,15,30,.96);backdrop-filter:blur(16px);flex-direction:column;padding:24px;gap:18px;transform:translateY(-120%);transition:transform .35s ease;align-items:flex-start}.nav-menu.open{transform:translateY(0)}.nav-toggle{display:flex}.nav-cta .btn{display:none}.hero{padding:120px 0 70px}.hero h1{font-size:34px}.hero-sub{font-size:16px}.adv-grid{grid-template-columns:1fr}.feat-grid{grid-template-columns:1fr}.sc-grid{grid-template-columns:1fr}.news-grid{grid-template-columns:1fr}.testi-grid{grid-template-columns:1fr}.footer-grid{grid-template-columns:1fr}}
@media(max-width:480px){.hero h1{font-size:28px}.section-head h2{font-size:26px}.stats-grid{grid-template-columns:1fr}.hero-meta{gap:16px}.btn{padding:12px 22px;font-size:14px}}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
@keyframes floatUp{0%{transform:translateY(0)}100%{transform:translateY(-120vh)}}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-18px)}}
@keyframes spin{to{transform:rotate(360deg)}}
@keyframes pulseRing{0%{transform:scale(.9);opacity:.8}100%{transform:scale(1.6);opacity:0}}