/* 模块化乐高风 · 积木块拼接功能组合 */
:root{
  --bg:#e8f1ff;--card:#ffffff;--ink:#0f172a;--muted:#475569;--line:#c7d7f0;
  --brand:#e11d2e;--brand-d:#be123c;--yellow:#facc15;--blue:#2563eb;--green:#22c55e;--orange:#f97316;
  --navy:#1e3a8a;--r:18px;--sh:0 12px 0 rgba(15,23,42,.12);--max:1160px;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:
  radial-gradient(circle at 10% 10%,rgba(250,204,21,.25),transparent 22%),
  radial-gradient(circle at 90% 8%,rgba(37,99,235,.18),transparent 24%),
  repeating-linear-gradient(90deg,transparent 0 22px,rgba(37,99,235,.06) 22px 23px),
  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(255,255,255,.94);backdrop-filter:none;border-bottom:4px solid #0f172a}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:70px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:900}
.logo-mark{width:38px;height:38px;border-radius:10px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:15px;border:3px solid #0f172a;box-shadow:4px 4px 0 #0f172a;position:relative}
.logo-mark::before,.logo-mark::after{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:rgba(255,255,255,.55);top:5px}
.logo-mark::before{left:7px}.logo-mark::after{right:7px}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px;font-weight:700}
.nav-links a{padding:8px 12px;border-radius:12px;color:var(--muted);border:2px solid transparent}
.nav-links a:hover{background:#fff;border-color:#0f172a;color:var(--ink)}
.nav-links a.t-active{background:#fee2e2;color:var(--brand);border-color:#0f172a;box-shadow:3px 3px 0 #0f172a}
.nav-cta{background:var(--brand)!important;color:#fff!important;border-color:#0f172a!important;box-shadow:3px 3px 0 #0f172a}
.nav-sep{width:3px;height:16px;background:#0f172a;margin:0 4px;border-radius:2px}
.hero{position:relative;overflow:hidden;color:#fff;background:radial-gradient(ellipse 80% 70% at 18% 20%,#1a3a6e 0%,transparent 55%),radial-gradient(ellipse 50% 60% at 88% 35%,rgba(225,29,46,.48) 0%,transparent 50%),linear-gradient(165deg,#071525 0%,#0f2748 50%,#0a1a32 100%)}
.skyline{position:absolute;inset:auto 0 0 0;height:140px;opacity:.22;pointer-events:none}
.hero-grid{position:relative;z-index:1;display:grid;grid-template-columns:1.05fr .95fr;gap:36px;align-items:center;padding:64px 0 72px}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:7px 12px;border-radius:12px;background:rgba(250,204,21,.15);border:2px solid rgba(250,204,21,.45);font-size:12px;font-weight:800;color:#fde68a;margin-bottom:14px}
.kicker i{width:10px;height:10px;border-radius:50%;background:var(--yellow);border:2px solid #0f172a}
.hero h1{margin:0 0 14px;font-size:clamp(28px,4vw,46px);line-height:1.15;font-weight:900}
.hero-lead{margin:0 0 18px;color:#c7d2e5;font-size:15px;max-width:48ch}
.brick-row{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.brick{padding:6px 12px;border-radius:10px;border:2px solid #0f172a;font-size:12px;font-weight:800;color:#0f172a;box-shadow:3px 3px 0 #0f172a}
.brick.b1{background:#facc15}.brick.b2{background:#22c55e}.brick.b3{background:#38bdf8}.brick.b4{background:#fb7185}
.platform-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.platform-pills button{border:2px solid rgba(255,255,255,.35);background:rgba(255,255,255,.08);color:#e8eef8;padding:8px 14px;border-radius:999px;cursor:pointer;font-weight:700}
.platform-pills button.is-on{background:#fff;color:#0f172a;border-color:#fff}
.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 20px;border-radius:14px;font-weight:800;border:3px solid #0f172a;cursor:pointer;box-shadow:4px 4px 0 #0f172a}
.btn-primary{background:var(--brand);color:#fff}
.btn-primary:hover{transform:translate(1px,1px);box-shadow:3px 3px 0 #0f172a}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.55);box-shadow:4px 4px 0 rgba(0,0,0,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn-line{background:#fff;color:var(--ink)}
.btn-line:hover{background:#eff6ff}
.btn-sm{padding:9px 14px;font-size:13px;box-shadow:3px 3px 0 #0f172a}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:12px;color:#9eb0c8;margin-bottom:14px}
.update-list{margin:0;padding-left:18px;color:#c5d3e6;font-size:13px}
.update-list li{margin:4px 0}
.mock-wrap{position:relative;perspective:1000px}
.mock{background:linear-gradient(180deg,#1e293b,#0f172a);border:3px solid #0f172a;border-radius:18px;padding:12px;box-shadow:8px 8px 0 rgba(0,0,0,.45);transform:rotateY(-5deg) rotateX(2deg)}
.mock-bar{height:12px;display:flex;gap:6px;margin-bottom:10px}
.mock-bar span{width:10px;height:10px;border-radius:50%;background:#64748b;border:2px solid #0f172a}
.mock-screen{display:grid;grid-template-columns:1.3fr .9fr;gap:8px;background:#020617;border-radius:12px;overflow:hidden;min-height:260px;border:2px solid #1e293b}
.mock-chart{padding:10px;position:relative}
.mock-chart img{width:100%;height:160px;object-fit:cover;border-radius:8px;opacity:.92}
.chart-line{position:absolute;left:16px;right:16px;top:50%;height:3px;background:linear-gradient(90deg,transparent,#e11d2e,transparent);opacity:.55}
.mock-side{border-left:2px solid #1e293b;padding:10px;font-size:11px}
.mock-side h4{margin:0 0 8px;color:#93c5fd;font-weight:800;font-size:11px}
.stk{display:flex;justify-content:space-between;padding:5px 0;border-bottom:1px dashed #1e293b;color:#e2e8f0}
.stk em{font-style:normal;color:#fb7185;font-weight:800}
.badge-adfree{position:absolute;top:-10px;right:-8px;background:var(--brand);color:#fff;font-size:12px;font-weight:900;padding:10px 14px;transform:rotate(12deg);border-radius:12px;border:3px solid #0f172a;box-shadow:4px 4px 0 #0f172a;z-index:2}
.section{padding:72px 0}
.section-head{text-align:center;margin-bottom:32px}
.section-head h2{margin:0 0 10px;font-size:clamp(24px,3vw,34px);font-weight:900}
.section-head p{margin:0 auto;max-width:56ch;color:var(--muted)}
.combo{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-bottom:24px}
.combo .brick{font-size:13px}
.platforms{display:grid;gap:16px}
.plat-pc{position:relative;overflow:hidden;display:grid;grid-template-columns:auto 1fr auto;gap:20px;align-items:center;background:linear-gradient(120deg,#fff 0%,#fee2e2 100%);border:3px solid #0f172a;border-radius:22px;padding:28px;box-shadow:var(--sh)}
.ribbon{position:absolute;top:18px;left:-34px;background:var(--brand);color:#fff;font-size:12px;font-weight:900;padding:7px 42px;transform:rotate(-45deg);border:2px solid #0f172a}
.plat-icon{width:68px;height:68px;border-radius:16px;background:var(--brand);color:#fff;display:grid;place-items:center;font-size:22px;font-weight:900;border:3px solid #0f172a;box-shadow:4px 4px 0 #0f172a}
.plat-pc h3{margin:0 0 6px;font-size:22px;font-weight:900}
.plat-pc p{margin:0;color:var(--muted);font-size:14px}
.plat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.plat-card{background:var(--card);border:3px solid #0f172a;border-radius:20px;padding:22px;text-align:center;box-shadow:6px 6px 0 rgba(15,23,42,.1)}
.plat-card .ico{width:52px;height:52px;margin:0 auto 12px;border-radius:14px;background:#dbeafe;border:3px solid #0f172a;display:grid;place-items:center;font-size:14px;font-weight:900}
.plat-card:nth-child(2) .ico{background:#dcfce7}
.plat-card:nth-child(3) .ico{background:#ffedd5}
.plat-card h3{margin:0 0 6px;font-size:17px;font-weight:900}
.plat-card p{margin:0 0 14px;color:var(--muted);font-size:13px}
.features{display:grid;gap:28px}
.feat{display:grid;grid-template-columns:1fr 1fr;gap:0;align-items:stretch;background:var(--card);border:3px solid #0f172a;border-radius:24px;overflow:hidden;box-shadow:var(--sh)}
.feat:nth-child(even) .feat-media{order:2}
.feat-media{min-height:240px;background:#0f172a;position:relative}
.feat-media img{width:100%;height:100%;object-fit:cover;min-height:240px}
.feat-media::before{content:"";position:absolute;top:10px;left:12px;width:14px;height:14px;border-radius:50%;background:#facc15;border:2px solid #0f172a;box-shadow:22px 0 0 #22c55e,44px 0 0 #38bdf8;z-index:1}
.feat-body{padding:28px}
.feat-body .tag{display:inline-block;padding:5px 10px;border-radius:10px;background:#fef08a;border:2px solid #0f172a;font-size:12px;font-weight:900;margin-bottom:10px}
.feat-body h3{margin:0 0 10px;font-size:22px;font-weight:900}
.feat-body p{margin:0;color:var(--muted)}
.more-feats{margin-top:28px;display:grid;grid-template-columns:repeat(3,1fr);gap:12px}
.more-feats details{background:#fff;border:3px solid #0f172a;border-radius:16px;padding:14px 16px;box-shadow:4px 4px 0 rgba(15,23,42,.08)}
.more-feats summary{cursor:pointer;font-weight:900;list-style:none}
.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,#6d28d9 0%,#ea580c 55%,#f59e0b 100%);color:#fff;padding:72px 0}
.community .section-head p{color:rgba(255,255,255,.9)}
.phones{display:grid;grid-template-columns:repeat(2,minmax(0,320px));gap:28px;justify-content:center}
.phone{background:#0f172a;border-radius:28px;padding:12px;border:4px solid #0f172a;box-shadow:8px 8px 0 rgba(0,0,0,.25)}
.phone-notch{width:96px;height:8px;border-radius:999px;background:#334155;margin:4px auto 10px}
.feed{background:#1e293b;border-radius:18px;overflow:hidden;border:2px solid #334155}
.feed img{width:100%;height:180px;object-fit:cover}
.feed-body{padding:14px}
.feed-body h4{margin:0 0 6px;font-size:15px;font-weight:900}
.feed-body p{margin:0;font-size:12px;color:#cbd5e1}
.site-footer{background:#0f172a;color:#94a3b8;padding:56px 0 28px;font-size:13px}
.qr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:32px}
.qr{background:#1e293b;border:3px solid #334155;border-radius:16px;padding:16px;text-align:center;color:#e2e8f0}
.qr-box{width:88px;height:88px;margin:0 auto 10px;border-radius:12px;background:repeating-conic-gradient(#334155 0% 25%,#1e293b 0% 50%) 50%/12px 12px;border:4px solid #fff}
.footer-links{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:24px}
.footer-links h4{margin:0 0 10px;color:#fff;font-size:14px;font-weight:900}
.footer-links a{display:block;padding:3px 0;color:#94a3b8}
.footer-links a:hover{color:#facc15}
.foot-meta{border-top:2px solid #334155;padding-top:18px;display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;color:#64748b}
.page-hero{padding:48px 0 24px;background:linear-gradient(180deg,#dbeafe,#e8f1ff)}
.page-hero h1{margin:0 0 10px;font-size:clamp(26px,3vw,36px);font-weight:900}
.page-hero p{margin:0;color:var(--muted);max-width:62ch}
.card-list{display:grid;gap:14px}
.dl-card,.faq-item{background:#fff;border:3px solid #0f172a;border-radius:18px;padding:22px;box-shadow:6px 6px 0 rgba(15,23,42,.08)}
.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:18px;font-weight:900}
.dl-card p,.faq-item p{margin:0;color:var(--muted);font-size:14px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:12px;font-weight:700}
.crumbs a{color:var(--blue)}
.note{font-size:12px;color:var(--muted);margin-top:8px}
@media (max-width:960px){
  .hero-grid,.feat,.plat-pc,.dl-card{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}
  .mock{transform:none}
}
@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}