/* 视频首屏沉浸风 · 自动播放电脑版操作演示 */
:root{
  --bg:#0a0c10;--panel:#12151c;--ink:#e8edf5;--muted:#8b95a8;--line:#232833;
  --brand:#e6252d;--brand-d:#c81c26;--glow:#ff4d57;--cyan:#5ad0ff;
  --max:1180px;--r:14px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--ink);line-height:1.65}
a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit}
.wrap{width:min(100% - 32px,var(--max));margin-inline:auto}
.site-header{position:sticky;top:0;z-index:50;background:rgba(10,12,16,.88);backdrop-filter:none;border-bottom:1px solid rgba(255,255,255,.06)}
.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}
.logo-mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(145deg,#ff5a63,var(--brand));color:#fff;display:grid;place-items:center;font-size:13px;box-shadow:0 0 20px rgba(230,37,45,.35)}
.nav-links{display:flex;align-items:center;gap:6px;flex-wrap:wrap;font-size:13px}
.nav-links a{padding:7px 12px;border-radius:999px;color:var(--muted)}
.nav-links a:hover{background:rgba(255,255,255,.06);color:#fff}
.nav-links a.t-active{background:rgba(230,37,45,.15);color:var(--brand);font-weight:700}
.nav-cta{background:var(--brand)!important;color:#fff!important;font-weight:700;box-shadow:0 0 24px rgba(230,37,45,.35)}
.nav-sep{width:1px;height:14px;background:rgba(255,255,255,.12);margin:0 4px}
.hero{position:relative;overflow:hidden;color:#fff;min-height:min(92vh,860px);display:flex;align-items:center;background:
  radial-gradient(ellipse 50% 60% at 88% 30%,rgba(230,37,45,.42) 0%,transparent 55%),
  radial-gradient(ellipse 80% 70% at 15% 40%,#0a2848 0%,transparent 55%),
  linear-gradient(165deg,#05070c 0%,#0c1524 45%,#0a1018 100%)}
.skyline{position:absolute;inset:auto 0 0 0;height:160px;opacity:.22;pointer-events:none;z-index:1}
.hero-video-bg{position:absolute;inset:0;z-index:0;overflow:hidden}
.hero-video-bg .reel{position:absolute;inset:-8%;display:grid;grid-template-columns:1fr 1fr;gap:8px;opacity:.18;filter:blur(1px) saturate(1.1);animation:reelDrift 18s linear infinite;will-change:transform}
.hero-video-bg .reel img{width:100%;height:50vh;object-fit:cover}
@keyframes reelDrift{0%{transform:translateY(0)}50%{transform:translateY(-4%)}100%{transform:translateY(0)}}
.hero-video-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(5,7,12,.55),rgba(5,7,12,.82) 55%,rgba(5,7,12,.95));z-index:1}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1fr 1.05fr;gap:36px;align-items:center;padding:56px 0 64px;width:min(100% - 32px,var(--max));margin-inline:auto}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:rgba(90,208,255,.1);border:1px solid rgba(90,208,255,.3);font-size:12px;color:#9fe0ff;margin-bottom:14px}
.kicker i{width:8px;height:8px;border-radius:50%;background:#5ad0ff;box-shadow:0 0 0 4px rgba(90,208,255,.2);animation:pulse 1.4s ease infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.45}}
.hero h1{margin:0 0 12px;font-size:clamp(26px,3.8vw,44px);line-height:1.15;font-weight:800}
.hero-lead{margin:0 0 16px;color:#b8c4d4;font-size:15px;max-width:46ch}
.qa-chips{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.qa-chips span{padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);font-size:12px;color:#d5deea}
.platform-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.platform-pills button{border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#e8edf5;padding:8px 14px;border-radius:999px;cursor:pointer}
.platform-pills button.is-on{background:#fff;color:#12151c;font-weight:700;border-color:#fff}
.hero-actions{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:16px}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 22px;border-radius:999px;font-weight:700;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 0 28px rgba(230,37,45,.4)}
.btn-primary:hover{background:var(--brand-d)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.3)}
.btn-ghost:hover{background:rgba(255,255,255,.08);border-color:var(--cyan);color:var(--cyan)}
.btn-line{background:rgba(255,255,255,.04);color:var(--ink);border-color:var(--line)}
.btn-line:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:8px 14px;font-size:13px}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 16px;font-size:12px;color:#8b95a8;margin-bottom:12px}
.update-list{margin:0;padding-left:18px;color:#a8b4c4;font-size:13px}
.update-list li{margin:4px 0}
.video-stage{position:relative}
.video-frame{background:#0e1118;border:1px solid rgba(255,255,255,.12);border-radius:18px;overflow:hidden;box-shadow:0 30px 80px rgba(0,0,0,.55),0 0 0 1px rgba(90,208,255,.08)}
.video-chrome{display:flex;align-items:center;justify-content:space-between;padding:10px 14px;background:rgba(0,0,0,.55);border-bottom:1px solid rgba(255,255,255,.06);font-size:11px;color:#9aa6b8}
.video-chrome .live{display:inline-flex;align-items:center;gap:6px;color:#ff8a90}
.video-chrome .live::before{content:"";width:7px;height:7px;border-radius:50%;background:var(--brand);animation:pulse 1s infinite}
.video-body{position:relative;aspect-ratio:16/10;background:#06080c}
.video-body video,.video-body .demo-layer{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.demo-layer{display:grid;grid-template-columns:1.35fr .85fr;gap:0}
.demo-main{position:relative;overflow:hidden}
.demo-main img{width:100%;height:100%;object-fit:cover;animation:crossfade 12s ease-in-out infinite}
.demo-main .f2{position:absolute;inset:0;opacity:0;animation:crossfade2 12s ease-in-out infinite}
@keyframes crossfade{0%,40%{opacity:1}50%,90%{opacity:0}100%{opacity:1}}
@keyframes crossfade2{0%,40%{opacity:0}50%,90%{opacity:1}100%{opacity:0}}
.demo-side{background:rgba(8,10,14,.92);border-left:1px solid rgba(255,255,255,.06);padding:12px;font-size:11px}
.demo-side h4{margin:0 0 8px;color:var(--cyan);font-size:11px;letter-spacing:.08em}
.demo-side .qa{margin-bottom:10px;padding:8px;border-radius:10px;background:rgba(90,208,255,.08);border:1px solid rgba(90,208,255,.2);color:#cfefff}
.stk{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px solid rgba(255,255,255,.05);color:#e6edf5}
.stk em{font-style:normal;color:#ff9aa0}
.video-controls{display:flex;align-items:center;gap:10px;padding:10px 14px;background:rgba(0,0,0,.65)}
.video-controls .play{width:28px;height:28px;border-radius:50%;background:var(--brand);display:grid;place-items:center;color:#fff;font-size:11px;box-shadow:0 0 16px rgba(230,37,45,.45)}
.scrub{flex:1;height:4px;border-radius:999px;background:rgba(255,255,255,.12);overflow:hidden}
.scrub i{display:block;height:100%;width:35%;background:linear-gradient(90deg,var(--brand),#ff8a90);border-radius:999px;animation:scrub 10s linear infinite;will-change:transform}
@keyframes scrub{0%{width:8%}100%{width:92%}}
.video-controls .time{font-size:11px;color:#8b95a8;min-width:72px;text-align:right}
.badge-adfree{position:absolute;top:18px;right:14px;background:var(--brand);color:#fff;font-size:12px;font-weight:800;padding:10px 14px;transform:rotate(10deg);border-radius:10px;box-shadow:0 10px 24px rgba(230,37,45,.45);z-index:3}
.caption{margin-top:10px;font-size:12px;color:#8b95a8;text-align:center}
.section{padding:72px 0;background:#0b0e14}
.section.alt{background:#0e1219}
.section-head{text-align:center;margin-bottom:36px}
.section-head h2{margin:0 0 10px;font-size:clamp(22px,3vw,32px)}
.section-head p{margin:0 auto;max-width:56ch;color:var(--muted)}
.platforms{display:grid;gap:14px}
.plat-pc{position:relative;overflow:hidden;display:grid;grid-template-columns:auto 1fr auto;gap:18px;align-items:center;background:linear-gradient(120deg,#1a1014,#12151c);border:1px solid #3a2028;border-radius:var(--r);padding:26px;box-shadow:0 0 40px rgba(230,37,45,.1)}
.ribbon{position:absolute;top:16px;left:-30px;background:var(--brand);color:#fff;font-size:12px;font-weight:800;padding:6px 40px;transform:rotate(-45deg)}
.plat-ico{width:58px;height:58px;border-radius:14px;background:linear-gradient(145deg,#ff5a63,var(--brand));display:grid;place-items:center;font-size:22px;color:#fff}
.plat-pc h3{margin:0 0 6px;font-size:20px}
.plat-pc p{margin:0;color:var(--muted);font-size:14px}
.plat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.plat-card{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:20px;text-align:center}
.plat-card h3{margin:0 0 8px;font-size:15px}
.plat-card p{margin:0 0 12px;color:var(--muted);font-size:13px}
.feat{display:grid;gap:22px}
.feat-row{display:grid;grid-template-columns:1fr 1fr;gap:0;align-items:center;background:var(--panel);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.feat-row.reverse .feat-media{order:2}
.feat-media img{width:100%;height:250px;object-fit:cover}
.feat-body{padding:28px}
.feat-body .pill{display:inline-block;margin-bottom:8px;padding:4px 10px;border-radius:999px;background:rgba(90,208,255,.1);color:var(--cyan);font-size:12px;border:1px solid rgba(90,208,255,.25)}
.feat-body h3{margin:0 0 8px;font-size:20px}
.feat-body p{margin:0;color:var(--muted);font-size:14px}
.more-feats{margin-top:22px}
.more-feats summary{cursor:pointer;list-style:none;padding:14px 18px;background:var(--panel);border:1px solid var(--line);border-radius:999px;font-weight:700;text-align:center}
.more-feats summary::-webkit-details-marker{display:none}
.more-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-top:12px}
.more-item{background:#0b0e14;border:1px solid var(--line);border-radius:12px;padding:14px}
.more-item h4{margin:0 0 4px;font-size:14px}
.more-item p{margin:0;font-size:13px;color:var(--muted)}
.community{padding:72px 0;background:linear-gradient(135deg,#3b1a5c 0%,#7a2e1e 55%,#c45a1a 100%)}
.community .section-head h2,.community .section-head p{color:#fff}
.community .section-head p{opacity:.9}
.phones{display:grid;grid-template-columns:1fr 1fr;gap:24px;max-width:720px;margin:0 auto}
.phone{background:#0a0e12;border:3px solid #1a2230;border-radius:28px;padding:12px;box-shadow:0 24px 48px rgba(0,0,0,.3);max-width:280px;margin:0 auto;width:100%}
.phone-notch{width:40%;height:8px;background:#1a2230;border-radius:0 0 8px 8px;margin:0 auto 10px}
.feed{background:#121820;border-radius:18px;padding:12px;min-height:300px}
.feed-item{padding:10px 0;border-bottom:1px solid #1e2834}
.feed-item:last-child{border:0}
.feed-item strong{display:block;font-size:13px;margin-bottom:4px;color:#fff}
.feed-item span{font-size:12px;color:#a8b4c0}
.site-footer{background:#06080c;color:#c5d0dc;padding:52px 0 28px;border-top:1px solid var(--line)}
.qr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:32px}
.qr-box{text-align:center}
.qr-fake{width:84px;height:84px;margin:0 auto 8px;background:
  repeating-linear-gradient(0deg,#1a2230 0 4px,transparent 4px 8px),
  repeating-linear-gradient(90deg,#1a2230 0 4px,transparent 4px 8px),#0a0e12;border:1px solid #2a3444;border-radius:10px}
.qr-box span{font-size:12px;color:var(--muted)}
.foot-links{display:flex;flex-wrap:wrap;gap:12px 18px;margin-bottom:16px;font-size:14px}
.foot-links a:hover{color:var(--cyan)}
.foot-contact{font-size:13px;color:var(--muted);margin-bottom:14px}
.foot-copy{font-size:12px;color:#5a6575;border-top:1px solid #1a2230;padding-top:14px}
.page-hero{padding:44px 0 16px;background:linear-gradient(180deg,#121820,#0b0e14)}
.page-hero h1{margin:0 0 10px;font-size:clamp(24px,3vw,34px)}
.page-hero p{margin:0;color:var(--muted);max-width:60ch}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:12px}
.crumbs a{color:var(--cyan)}
.card-list{display:grid;gap:12px}
.dl-card,.faq-item{background:var(--panel);border:1px solid var(--line);border-radius:var(--r);padding:22px}
.dl-card{display:grid;grid-template-columns:1fr auto;gap:14px;align-items:center}
.dl-card h2,.faq-item h2{margin:0 0 8px;font-size:17px}
.dl-card p,.faq-item p{margin:0;color:var(--muted);font-size:14px}
@media (max-width:900px){
  .hero-grid,.feat-row,.feat-row.reverse .feat-media,.plat-pc,.phones,.plat-grid,.more-grid,.qr-grid,.dl-card{grid-template-columns:1fr}
  .feat-row.reverse .feat-media{order:0}
  .plat-pc{justify-items:start}
  .hide-sm{display:none!important}
  .hero{min-height:auto}
}

/* 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}