:root{--primary:#1a73e8;--primary-dark:#0d47a1;--primary-light:#e8f0fe;--accent:#ff6d00;--accent-light:#fff3e0;--green:#2e7d32;--green-light:#e8f5e9;--bg:#f5f7fa;--card-bg:#fff;--text:#212121;--text-secondary:#616161;--border:#e3e8ef;--shadow:0 4px 20px rgba(0,0,0,.08);--shadow-hover:0 8px 30px rgba(0,0,0,.12);--radius:16px}
*{margin:0;padding:0;box-sizing:border-box}
body{font-family:var(--font,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,sans-serif);background:var(--bg);color:var(--text);line-height:1.7;scroll-behavior:smooth}
.lang-nav{display:flex;justify-content:center;gap:8px;padding:14px 20px;background:#fff;border-bottom:1px solid var(--border);flex-wrap:wrap;position:sticky;top:0;z-index:100}
.lang-nav a{text-decoration:none;transition:all .2s}
.lang-nav a:hover{transform:translateY(-2px)}
.hero{background:linear-gradient(135deg,var(--primary-dark) 0%,var(--primary) 50%,#2979ff 100%);color:#fff;padding:80px 40px 64px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;background:radial-gradient(ellipse at 30% 50%,rgba(255,255,255,.09) 0%,transparent 70%);animation:heroGlow 8s ease-in-out infinite alternate}
@keyframes heroGlow{0%{transform:translate(0,0)}100%{transform:translate(5%,-3%)}}
.hero-inner{position:relative;z-index:1;max-width:960px;margin:0 auto}
.hero-badge{display:inline-block;background:rgba(255,255,255,.15);border:1px solid rgba(255,255,255,.3);border-radius:24px;padding:6px 20px;font-size:14px;letter-spacing:1px;margin-bottom:20px;backdrop-filter:blur(4px)}
.hero-title{font-size:52px;font-weight:800;letter-spacing:-1px;margin-bottom:12px}
.hero-title span{color:var(--accent)}
.hero-sub{font-size:20px;font-weight:300;opacity:.92;margin-bottom:22px;max-width:760px;margin-left:auto;margin-right:auto}
.hero-tags{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}
.hero-tag{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.2);border-radius:12px;padding:9px 16px;font-size:14px;backdrop-filter:blur(4px)}
.hero-img{margin:30px auto 0;max-width:420px}
.hero-img img{width:100%;border-radius:16px;box-shadow:0 10px 36px rgba(255,255,255,.18)}
.pagebar{display:flex;justify-content:center;gap:28px;background:#fff;padding:16px;flex-wrap:wrap;border-bottom:1px solid var(--border);position:sticky;top:54px;z-index:90}
.pagebar a{color:var(--text-secondary);text-decoration:none;font-weight:600;font-size:15px}
.pagebar a:hover{color:var(--primary)}
.section{max-width:1120px;margin:0 auto;padding:64px 40px}
.section-head{text-align:center;margin-bottom:44px}
.section-label{display:inline-block;font-size:13px;letter-spacing:3px;color:var(--primary);font-weight:700;margin-bottom:10px}
.section-title{font-size:34px;font-weight:700;margin-bottom:12px}
.section-lede{font-size:16px;color:var(--text-secondary);max-width:680px;margin:0 auto}
.prod-block{background:var(--card-bg);border-radius:20px;box-shadow:var(--shadow);padding:40px;margin-bottom:28px}
.section-sub{display:inline-block;font-size:12px;letter-spacing:2px;color:#fff;background:var(--primary);padding:4px 14px;border-radius:20px;font-weight:700;margin-bottom:12px}
.prod-title{font-size:26px;font-weight:700;margin-bottom:8px}
.prod-desc{font-size:15px;color:var(--text-secondary);margin-bottom:24px}
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.feat-card{background:#fff;border:1px solid var(--border);border-radius:14px;padding:22px;transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden}
.feat-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.feat-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:26px;margin-bottom:14px}
.feat-name{font-size:17px;font-weight:700;margin-bottom:6px}
.feat-brief{font-size:14px;color:var(--text-secondary);line-height:1.6}
.app-list{list-style:none;margin-top:12px}
.app-list li{font-size:13.5px;color:var(--text-secondary);padding:5px 0 5px 16px;position:relative}
.app-list li::before{content:'';position:absolute;left:0;top:13px;width:6px;height:6px;border-radius:50%;background:var(--accent)}
.gallery{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:12px;margin-top:24px;justify-items:center}
.gimg{width:100%;max-width:200px;aspect-ratio:1/1;height:auto;object-fit:contain;background:#fff;border-radius:12px;border:1px solid var(--border);padding:6px}
.hero-img img{object-fit:contain}
.spec-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px;margin-bottom:32px}
.spec-card{background:var(--card-bg);border-radius:16px;box-shadow:var(--shadow);padding:28px}
.spec-card h4{font-size:18px;font-weight:700;color:var(--primary);margin-bottom:16px;text-align:center}
.spec-table{width:100%;border-collapse:collapse}
.spec-table td{padding:12px 14px;border-bottom:1px solid var(--border);font-size:15px}
.spec-table td:first-child{color:var(--text-secondary);width:45%}
.spec-table td:last-child{font-weight:600}
.spec-table tr:last-child td{border-bottom:none}
.compare-wrap{background:var(--card-bg);border-radius:16px;box-shadow:var(--shadow);overflow:hidden}
.compare-table{width:100%;border-collapse:collapse}
.compare-table th{background:var(--primary);color:#fff;padding:15px 20px;font-weight:600;font-size:15px;text-align:left}
.compare-table td{padding:13px 20px;border-bottom:1px solid var(--border);font-size:15px}
.compare-table tr:last-child td{border-bottom:none}
.compare-table tr:hover td{background:var(--primary-light)}
.contact-card{background:var(--card-bg);border-radius:20px;box-shadow:var(--shadow);padding:40px;display:grid;grid-template-columns:auto 1fr;gap:36px;align-items:center;max-width:760px;margin:0 auto}
.contact-img{width:240px;border-radius:14px;box-shadow:var(--shadow)}
.contact-info h3{font-size:21px;font-weight:700;color:var(--primary);margin-bottom:18px}
.c-row{display:flex;align-items:center;gap:10px;font-size:16px;padding:9px 0}
.footer{text-align:center;padding:40px;color:var(--text-secondary);font-size:14px;border-top:1px solid var(--border);margin-top:40px}
.footer .brand{font-weight:700;color:var(--primary);font-size:16px;margin-bottom:6px}
.footer .copy{margin-top:8px;font-size:12px;opacity:.65}
.friends{display:flex;flex-wrap:wrap;justify-content:center;align-items:center;gap:10px 16px;margin:18px 0 6px}
.friends-title{font-weight:700;color:var(--text);font-size:13px;letter-spacing:.5px}
.friends a{color:var(--primary);text-decoration:none;font-size:13.5px;padding:3px 4px;border-bottom:1px solid transparent;transition:border-color .2s}
.friends a:hover{border-bottom-color:var(--primary)}
[dir="rtl"] .friends{flex-direction:row-reverse}
[dir="rtl"] .pagebar,.lang-nav[dir] {}
[dir="rtl"] body{direction:rtl}
[dir="rtl"] .hero-sub,[dir="rtl"] .section-lede{margin-left:auto;margin-right:auto}
[dir="rtl"] .app-list li{padding:5px 16px 5px 0}
[dir="rtl"] .app-list li::before{left:auto;right:0}
@media(max-width:768px){
  .hero{padding:54px 20px 44px}.hero-title{font-size:34px}.hero-sub{font-size:16px}
  .section{padding:42px 20px}.feat-grid{grid-template-columns:1fr}.spec-grid{grid-template-columns:1fr}
  .section-title{font-size:28px}.contact-card{grid-template-columns:1fr;text-align:center;justify-items:center}
  .contact-img{width:200px}.pagebar{gap:16px;top:50px}
}
.lang-nav a.active{background:var(--primary)!important;color:#fff!important;font-weight:700}
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}.product-card{background:var(--card-bg);border:1px solid var(--border);border-radius:18px;overflow:hidden;box-shadow:var(--shadow)}
.product-card img{width:100%;height:280px;object-fit:contain;background:#fff;display:block}.product-card>div{padding:20px}.product-card h3{font-size:18px;margin:0 0 9px}.product-card p{color:var(--text-secondary);line-height:1.65;margin:0}
.cost-box{background:linear-gradient(135deg,#ecfdf5,#eff6ff);padding:38px;border-radius:22px;border:1px solid var(--border)}
.faq-list{max-width:900px;margin:auto;display:grid;gap:12px}.faq-list details{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:0 20px;box-shadow:0 4px 14px rgba(15,23,42,.05)}
.faq-list summary{cursor:pointer;font-weight:700;padding:18px 28px 18px 0;position:relative}.faq-list summary::after{content:'+';position:absolute;right:0;color:var(--primary);font-size:22px}.faq-list details[open] summary::after{content:'−'}.faq-list p{margin:0;padding:0 0 18px;color:var(--text-secondary);line-height:1.7}
[dir="rtl"] .faq-list summary{padding:18px 0 18px 28px}[dir="rtl"] .faq-list summary::after{right:auto;left:0}
@media(max-width:850px){.product-grid{grid-template-columns:1fr}.product-card img{height:auto;max-height:360px}.cost-box{padding:26px}}
.runtime-stats{max-width:820px;margin:auto;display:grid;grid-template-columns:1fr 1fr;gap:18px}.runtime-stats>div{background:#0d47a1;color:#fff;border-radius:16px;padding:24px;display:flex;align-items:center;justify-content:center;gap:14px}.runtime-stats span{font-size:24px;color:#90caf9}.runtime-stats b{color:#ffcc80}
.flow-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;counter-reset:step}.flow-step{background:#fff;border-top:4px solid var(--primary);border-radius:14px;padding:24px;box-shadow:var(--shadow)}.flow-step h3{font-size:17px;margin-bottom:8px}.flow-step p,.scene-card p{color:var(--text-secondary);font-size:14px}
.scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.scene-card{background:var(--card-bg);border:1px solid var(--border);border-radius:14px;padding:24px}.scene-card h3{font-size:17px;margin-bottom:7px;color:var(--primary-dark)}
@media(max-width:850px){.runtime-stats,.flow-grid,.scene-grid{grid-template-columns:1fr}.runtime-stats>div{padding:18px}}