:root{
  --bg:#f7f8fb; --ink:#0f172a; --muted:#64748b;
  --accent:#f97316; --accent2:#0f172a;
  --line:#e2e6ee; --card:#ffffff;
  --radius:4px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,sans-serif;line-height:1.7;position:relative}
.container{max-width:1080px;margin:0 auto;padding:0 24px}
a{color:inherit;text-decoration:none}
h1,h2,h3{margin:0 0 12px;font-weight:800;letter-spacing:-.01em}
p{margin:0 0 12px;color:var(--muted)}

/* animated dot grid background */
.gridbg{position:fixed;inset:0;z-index:-1;background-image:radial-gradient(var(--line) 1.4px,transparent 1.4px);background-size:26px 26px;animation:pan 40s linear infinite}
@keyframes pan{from{background-position:0 0}to{background-position:520px 260px}}

.site-nav{position:sticky;top:0;z-index:50;background:rgba(247,248,251,.85);backdrop-filter:blur(10px);border-bottom:2px solid var(--ink)}
.nav-inner{max-width:1080px;margin:0 auto;padding:16px 24px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:8px;font-weight:900;font-size:18px}
.brand svg{width:24px;height:24px}
.brand-en{color:var(--muted);font-weight:600;font-size:12px}
.nav-links{display:flex;gap:24px}
.nav-links a{font-size:14px;font-weight:600;border-bottom:2px solid transparent;padding-bottom:2px}
.nav-links a:hover{border-color:var(--accent)}
.nav-actions{display:flex;align-items:center;gap:10px}
.burger{display:none;flex-direction:column;gap:4px;cursor:pointer}
.burger span{width:22px;height:2px;background:var(--ink)}
#nav-toggle,.mobile-menu{display:none}

.btn{display:inline-flex;align-items:center;justify-content:center;padding:11px 22px;border-radius:var(--radius);font-size:14px;font-weight:700;transition:.2s;border:2px solid var(--ink);cursor:pointer}
.btn-primary{background:var(--accent);color:#fff;border-color:var(--accent)}
.btn-primary:hover{background:var(--ink);border-color:var(--ink)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff}
.btn-block{width:100%}

.hero{padding:100px 0 70px;text-align:left}
.promo-tag{display:inline-flex;align-items:center;gap:6px;padding:6px 14px;border:2px solid var(--ink);border-radius:999px;font-size:13px;font-weight:700;margin-bottom:24px}
.promo-tag::before{content:"";width:8px;height:8px;background:var(--accent);border-radius:50%;animation:pulse 1.4s ease-in-out infinite}
@keyframes pulse{50%{opacity:.3}}
.hero h1{font-size:46px;line-height:1.25;max-width:720px;margin:0 0 18px}
.hero h1 span{color:var(--accent)}
.hero .sub{max-width:520px;font-size:16px}
.hero-ctas{display:flex;gap:14px;margin-top:26px;flex-wrap:wrap}

section{padding:64px 0}
.section-head{max-width:560px;margin:0 0 40px}
.eyebrow{display:inline-block;font-size:12px;letter-spacing:.14em;color:var(--accent);font-weight:800;margin-bottom:8px}

.adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border:2px solid var(--ink)}
.adv-card{background:var(--card);padding:26px;border-right:2px solid var(--ink)}
.adv-card:last-child{border-right:none}
.adv-card .icon{width:36px;height:36px;background:var(--ink);color:var(--accent);display:flex;align-items:center;justify-content:center;margin-bottom:14px}

.stream-row{margin-top:0;border:2px solid var(--ink);border-top:none;padding:20px 24px;display:flex;flex-wrap:wrap;gap:14px;align-items:center;justify-content:space-between}
.pill-list{display:flex;flex-wrap:wrap;gap:8px}
.pill{padding:5px 12px;border:1.5px solid var(--ink);font-size:13px;font-weight:600}

.pricing-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.price-card{background:var(--card);border:2px solid var(--ink);padding:28px;position:relative}
.price-card.recommend{background:var(--ink);color:#fff}
.price-card.recommend .cap,.price-card.recommend .period{color:#cbd5e1}
.price-card.recommend .now{color:#fff}
.badge{position:absolute;top:-13px;left:20px;background:var(--accent);color:#fff;font-size:12px;font-weight:800;padding:4px 12px}
.cap{color:var(--muted);font-size:13px;margin-bottom:16px}
.price-table{width:100%;border-collapse:collapse;margin-bottom:18px}
.price-table td{padding:8px 0;border-bottom:1px dashed var(--line);font-size:14px}
.price-table .period{color:var(--muted)}
.price-table .now{font-size:20px;font-weight:900}
.price-note{font-size:12px;color:var(--muted);margin-top:14px}

.why-row{display:grid;grid-template-columns:1fr 1fr;gap:40px;align-items:center;margin-bottom:50px}
.why-row:nth-child(even) .why-visual{order:-1}
.why-visual{border:2px solid var(--ink);padding:24px;min-height:190px;background:var(--card)}
.data-panel{display:flex;gap:10px;align-items:flex-end;height:140px}
.data-panel i{flex:1;background:var(--accent);animation:grow 3s ease-in-out infinite alternate}
.data-panel i:nth-child(2){animation-delay:.3s}
.data-panel i:nth-child(3){animation-delay:.6s}
.data-panel i:nth-child(4){animation-delay:.9s}
.data-panel i:nth-child(5){animation-delay:1.2s}
@keyframes grow{from{height:25%}to{height:95%}}
.terminal{background:var(--ink);border-radius:2px;padding:18px;font-family:Menlo,Consolas,monospace;font-size:13px;color:#4ade80}
.terminal .l1{color:#94a3b8}
.terminal .cursor{display:inline-block;width:8px;height:14px;background:var(--accent);animation:blink 1s step-end infinite;vertical-align:middle}
@keyframes blink{50%{opacity:0}}

.cta-band{text-align:left;background:var(--ink);color:#fff;padding:56px;display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px}
.cta-band h2{color:#fff}
.cta-band p{color:#cbd5e1}

.marquee{overflow:hidden;position:relative;mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;gap:0;width:max-content;animation:scroll 30s linear infinite}
.marquee:hover .marquee-track{animation-play-state:paused}
@keyframes scroll{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.t-card{width:280px;flex:0 0 auto;background:var(--card);border:2px solid var(--ink);border-left:none;padding:20px}
.marquee-track .t-card:first-child{border-left:2px solid var(--ink)}
.stars{color:var(--accent);margin-bottom:8px;font-size:14px}
.t-name{font-weight:800;font-size:13px;margin-top:10px}

.faq-list{max-width:720px}
.faq-item{border-bottom:2px solid var(--ink);padding:16px 0}
.faq-item summary{cursor:pointer;font-weight:700;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{content:"→";color:var(--accent);transition:.2s}
.faq-item[open] summary::after{content:"↓"}
.faq-item p{margin-top:10px}

footer{border-top:2px solid var(--ink);padding:50px 0 26px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:30px;margin-bottom:30px}
.footer-col h4{font-size:14px;margin-bottom:14px}
.footer-col ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.footer-col ul a{color:var(--muted);font-size:13px;font-weight:600}
.footer-col ul a:hover{color:var(--accent)}
.footer-seo{font-size:12px;color:var(--muted);max-width:900px;line-height:1.8}
.friend-links{display:flex;flex-wrap:wrap;gap:10px;margin:18px 0;font-size:12px}
.friend-links .label{color:var(--muted);font-weight:700}
.friend-links a{color:var(--ink);padding:3px 10px;border:1.5px solid var(--ink);font-weight:600}
.friend-links a:hover{background:var(--ink);color:#fff}
.copyright{font-size:12px;color:var(--muted)}

@media (max-width:860px){
  .adv-grid,.pricing-grid{grid-template-columns:1fr}
  .adv-card{border-right:none;border-bottom:2px solid var(--ink)}
  .adv-card:last-child{border-bottom:none}
  .why-row{grid-template-columns:1fr}
  .why-row:nth-child(even) .why-visual{order:0}
  .footer-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .burger{display:flex}
  .nav-actions .btn-ghost{display:none}
  #nav-toggle:checked ~ .mobile-menu{display:flex}
  .mobile-menu{display:none;position:absolute;top:100%;left:0;right:0;background:var(--bg);flex-direction:column;padding:20px 24px;gap:14px;border-bottom:2px solid var(--ink)}
  .hero h1{font-size:30px}
  .cta-band{padding:36px 24px;flex-direction:column;text-align:center}
}