/* 极简黑底红字风 · 高冲击品牌口号 */
:root{
  --bg:#000;--panel:#0a0a0a;--card:#111;--ink:#f5f5f5;--muted:#8a8a8a;--line:#222;
  --brand:#e10600;--brand-d:#b80000;--r:0;--sh:none;--max:1160px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Helvetica Neue","Arial","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.6;letter-spacing:.02em}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block;filter:grayscale(.15) contrast(1.05)}button{font:inherit}
.wrap{width:min(100% - 32px,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(0,0,0,.92);backdrop-filter:none;border-bottom:1px solid #1a1a1a}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:64px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;text-transform:uppercase;letter-spacing:.12em}
.logo-mark{width:28px;height:28px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:12px;font-weight:900}
.nav-links{display:flex;align-items:center;gap:4px;flex-wrap:wrap;font-size:12px;letter-spacing:.14em;text-transform:uppercase}
.nav-links a{padding:8px 10px;color:#888}
.nav-links a:hover{color:#fff}
.nav-links a.t-active{color:var(--brand);font-weight:800;border-bottom:2px solid var(--brand)}
.nav-cta{background:var(--brand)!important;color:#fff!important;font-weight:800;padding:8px 14px!important}
.nav-sep{width:1px;height:12px;background:#333;margin:0 6px}
.slogan-bar{border-bottom:1px solid #1a1a1a;padding:10px 0;text-align:center;font-size:11px;letter-spacing:.28em;text-transform:uppercase;color:var(--brand);font-weight:800}
.hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(ellipse 80% 70% at 18% 20%,#1a1a1a 0%,transparent 55%),radial-gradient(ellipse 50% 60% at 88% 35%,rgba(225,6,0,.35) 0%,transparent 50%),linear-gradient(165deg,#000 0%,#0d0d0d 50%,#000 100%)}
.skyline{position:absolute;inset:auto 0 0 0;height:120px;opacity:.18;pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding:72px 0 80px}
.kicker{display:inline-block;margin-bottom:16px;font-size:11px;letter-spacing:.3em;text-transform:uppercase;color:var(--brand);font-weight:800}
.hero h1{margin:0 0 12px;font-size:clamp(32px,5vw,56px);line-height:1.05;font-weight:900;letter-spacing:.04em}
.hero h1 span{color:var(--brand)}
.brand-line{margin:0 0 20px;font-size:clamp(14px,2vw,18px);font-weight:800;letter-spacing:.2em;text-transform:uppercase;color:#fff}
.brand-line em{font-style:normal;color:var(--brand)}
.hero-lead{margin:0 0 22px;color:#9a9a9a;font-size:14px;max-width:44ch}
.platform-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:22px}
.platform-pills button{border:1px solid #333;background:transparent;color:#ccc;padding:8px 14px;border-radius:999px;cursor:pointer;font-size:12px;letter-spacing:.1em;text-transform:uppercase}
.platform-pills button.is-on{background:var(--brand);color:#fff;border-color:var(--brand);font-weight:800}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:18px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;font-weight:800;border:1px solid transparent;cursor:pointer;letter-spacing:.08em;text-transform:uppercase;font-size:12px}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-d)}
.btn-ghost{background:transparent;color:#fff;border-color:#444}
.btn-ghost:hover{border-color:var(--brand);color:var(--brand)}
.btn-line{background:transparent;color:#fff;border-color:#444}
.btn-line:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:9px 14px;font-size:11px}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:11px;color:#777;margin-bottom:14px;letter-spacing:.08em;text-transform:uppercase}
.meta-row strong{color:var(--brand)}
.update-list{margin:0;padding-left:18px;color:#9a9a9a;font-size:13px}
.update-list li{margin:4px 0}
.mock-wrap{position:relative}
.mock{background:#0a0a0a;border:1px solid #2a2a2a;padding:12px;box-shadow:0 30px 60px rgba(0,0,0,.6)}
.mock-bar{height:10px;display:flex;gap:6px;margin-bottom:10px}
.mock-bar span{width:8px;height:8px;background:#333}
.mock-bar span:first-child{background:var(--brand)}
.mock-screen{display:grid;grid-template-columns:1.3fr .9fr;gap:8px;background:#000;overflow:hidden;min-height:260px;border:1px solid #1a1a1a}
.mock-chart{padding:10px;position:relative}
.mock-chart img{width:100%;height:160px;object-fit:cover;opacity:.85}
.chart-line{position:absolute;left:16px;right:16px;top:50%;height:2px;background:var(--brand);opacity:.7}
.mock-side{border-left:1px solid #1a1a1a;padding:10px;font-size:11px}
.mock-side h4{margin:0 0 8px;color:var(--brand);font-weight:800;font-size:10px;letter-spacing:.16em;text-transform:uppercase}
.stk{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px solid #1a1a1a;color:#ddd}
.stk em{font-style:normal;color:var(--brand);font-weight:700}
.badge-adfree{position:absolute;top:-8px;right:-6px;background:var(--brand);color:#fff;font-size:11px;font-weight:900;padding:10px 12px;transform:rotate(12deg);letter-spacing:.08em;text-transform:uppercase;z-index:2}
.section{padding:72px 0;border-top:1px solid #1a1a1a}
.section-head{margin-bottom:36px}
.section-head h2{margin:0 0 10px;font-size:clamp(22px,3vw,32px);font-weight:900;letter-spacing:.06em;text-transform:uppercase}
.section-head h2 span{color:var(--brand)}
.section-head p{margin:0;color:var(--muted);max-width:60ch;font-size:14px}
.platforms{display:grid;gap:14px}
.plat-pc{position:relative;overflow:hidden;display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center;background:#0a0a0a;border:1px solid #2a2a2a;padding:28px}
.ribbon{position:absolute;top:16px;left:-34px;background:var(--brand);color:#fff;font-size:11px;font-weight:900;padding:6px 40px;transform:rotate(-45deg);letter-spacing:.1em;text-transform:uppercase}
.plat-icon{width:60px;height:60px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:18px;font-weight:900;letter-spacing:.05em}
.plat-pc h3{margin:0 0 6px;font-size:20px;font-weight:900;letter-spacing:.04em}
.plat-pc p{margin:0;color:var(--muted);font-size:13px}
.plat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.plat-card{background:#0a0a0a;border:1px solid #222;padding:22px;text-align:left}
.plat-card .ico{width:40px;height:40px;margin-bottom:12px;background:#111;border:1px solid #333;display:grid;place-items:center;font-size:11px;font-weight:800;color:var(--brand);letter-spacing:.08em}
.plat-card h3{margin:0 0 6px;font-size:15px;font-weight:800;letter-spacing:.08em;text-transform:uppercase}
.plat-card p{margin:0 0 14px;color:var(--muted);font-size:12px}
.features{display:grid;gap:20px}
.feat{display:grid;grid-template-columns:1fr 1fr;gap:0;align-items:stretch;background:#0a0a0a;border:1px solid #1a1a1a;overflow:hidden}
.feat:nth-child(even) .feat-media{order:2}
.feat-media{min-height:240px;background:#000}
.feat-media img{width:100%;height:100%;object-fit:cover;min-height:240px}
.feat-body{padding:28px}
.feat-body .tag{display:inline-block;margin-bottom:10px;font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--brand);font-weight:800}
.feat-body h3{margin:0 0 10px;font-size:22px;font-weight:900}
.feat-body p{margin:0;color:var(--muted);font-size:14px}
.more-feats{margin-top:20px;display:grid;grid-template-columns:repeat(3,1fr);gap:10px}
.more-feats details{background:#0a0a0a;border:1px solid #1a1a1a;padding:14px 16px}
.more-feats summary{cursor:pointer;font-weight:800;list-style:none;font-size:12px;letter-spacing:.1em;text-transform:uppercase}
.more-feats summary::-webkit-details-marker{display:none}
.more-feats details[open] summary{color:var(--brand);margin-bottom:8px}
.more-feats details p{margin:0;color:var(--muted);font-size:13px}
.community{background:linear-gradient(135deg,#2a0a40 0%,#6b1a0a 55%,#8a2a08 100%);color:#fff;padding:72px 0;border-top:1px solid #1a1a1a}
.community .section-head p{color:rgba(255,255,255,.75)}
.phones{display:grid;grid-template-columns:repeat(2,minmax(0,320px));gap:24px;justify-content:center}
.phone{background:#000;padding:10px;border:1px solid rgba(255,255,255,.2)}
.phone-notch{width:80px;height:6px;background:#333;margin:4px auto 8px}
.feed{background:#111;overflow:hidden}
.feed img{width:100%;height:170px;object-fit:cover}
.feed-body{padding:14px}
.feed-body h4{margin:0 0 6px;font-size:14px;font-weight:800;letter-spacing:.04em}
.feed-body p{margin:0;font-size:12px;color:#bbb}
.news-strip{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:#1a1a1a;margin-bottom:28px;border:1px solid #1a1a1a}
.news-strip article{background:#000;padding:18px}
.news-strip .lab{font-size:10px;letter-spacing:.2em;text-transform:uppercase;color:var(--brand);font-weight:800;margin-bottom:8px}
.news-strip h3{margin:0;font-size:15px;font-weight:800;line-height:1.4}
.site-footer{background:#000;color:#777;padding:56px 0 28px;font-size:12px;border-top:1px solid #1a1a1a}
.qr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:28px}
.qr{background:#0a0a0a;border:1px solid #222;padding:14px;text-align:center;color:#ddd}
.qr-box{width:80px;height:80px;margin:0 auto 8px;background:repeating-conic-gradient(#222 0% 25%,#000 0% 50%) 50%/10px 10px;border:2px solid #fff}
.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:20px}
.footer-links h4{margin:0 0 10px;color:#fff;font-size:11px;letter-spacing:.16em;text-transform:uppercase}
.footer-links a{display:block;padding:3px 0;color:#777}
.footer-links a:hover{color:var(--brand)}
.foot-meta{border-top:1px solid #1a1a1a;padding-top:16px;display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;color:#555}
.page-hero{padding:48px 0 24px;border-bottom:1px solid #1a1a1a}
.page-hero h1{margin:0 0 10px;font-size:clamp(24px,3vw,34px);font-weight:900;letter-spacing:.04em;text-transform:uppercase}
.page-hero p{margin:0;color:var(--muted);max-width:62ch;font-size:14px}
.card-list{display:grid;gap:12px}
.dl-card,.faq-item{background:#0a0a0a;border:1px solid #1a1a1a;padding:22px}
.dl-card{display:grid;grid-template-columns:1fr auto;gap:16px;align-items:center}
.dl-card h2,.faq-item h2{margin:0 0 8px;font-size:16px;font-weight:900;letter-spacing:.04em}
.dl-card p,.faq-item p{margin:0;color:var(--muted);font-size:13px}
.crumbs{font-size:11px;color:#666;margin-bottom:12px;letter-spacing:.12em;text-transform:uppercase}
.crumbs a{color:var(--brand)}
.note{font-size:11px;color:#666;margin-top:8px;letter-spacing:.06em;text-transform:uppercase}
@media (max-width:960px){
  .hero-grid,.feat,.plat-pc,.dl-card,.news-strip{grid-template-columns:1fr}
  .feat:nth-child(even) .feat-media{order:0}
  .plat-grid,.more-feats,.qr-grid,.footer-links,.phones{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .plat-grid,.more-feats,.qr-grid,.footer-links,.phones{grid-template-columns:1fr}
  .nav-links .hide-sm{display:none}
}

/* perf */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}
}
.site-header{backdrop-filter:none!important;-webkit-backdrop-filter:none!important}
.feat-media img,.mock-chart img,.feat-row img{content-visibility:auto}
.community,.site-footer{content-visibility:auto;contain-intrinsic-size:800px}
img{height:auto}