/* 航拍城市晨曦风 · 广阔天空衬托远航版格局 */
:root{
  --bg:#f4f1ec;--card:#fffdf9;--ink:#1f2937;--muted:#6b7280;--line:#e5ddd2;
  --brand:#e24a3b;--brand-d:#c53a2c;--dawn:#f6b26b;--sky:#7eb8d8;--navy:#1e3a5f;
  --r:18px;--sh:0 18px 48px rgba(30,58,95,.1);--max:1160px;
  --serif:"Source Han Serif SC","Noto Serif SC","Songti SC","SimSun",serif;
}
*{box-sizing:border-box}html{scroll-behavior:smooth}
body{margin:0;font-family:"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;background:
  radial-gradient(ellipse 80% 50% at 50% -10%,rgba(246,178,107,.28),transparent 55%),
  radial-gradient(ellipse 60% 40% at 90% 20%,rgba(126,184,216,.18),transparent 45%),
  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(255,253,249,.9);backdrop-filter:none;border-bottom:1px solid var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;min-height:68px;gap:16px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800}
.logo-mark{width:36px;height:36px;border-radius:12px;background:linear-gradient(145deg,#ff7a5c,var(--brand));color:#fff;display:grid;place-items:center;font-size:14px;box-shadow:0 8px 20px rgba(226,74,59,.28)}
.nav-links{display:flex;align-items:center;gap:8px;flex-wrap:wrap;font-size:14px}
.nav-links a{padding:7px 12px;border-radius:999px;color:var(--muted)}
.nav-links a:hover{background:#fff;color:var(--ink)}
.nav-links a.t-active{background:#ffe8e3;color:var(--brand);font-weight:700}
.nav-cta{background:var(--brand)!important;color:#fff!important;font-weight:700;box-shadow:0 8px 20px rgba(226,74,59,.28)}
.nav-sep{width:1px;height:16px;background:var(--line);margin:0 4px}
.hero{position:relative;overflow:hidden;color:#fff;background:
  radial-gradient(ellipse 90% 80% at 50% -20%,rgba(246,178,107,.55) 0%,transparent 50%),
  radial-gradient(ellipse 80% 70% at 18% 20%,#1a3a6e 0%,transparent 55%),
  radial-gradient(ellipse 50% 60% at 88% 35%,rgba(226,74,59,.42) 0%,transparent 50%),
  linear-gradient(165deg,#0a1830 0%,#173554 42%,#1a2a40 100%)}
.skyline{position:absolute;inset:auto 0 0 0;height:160px;opacity:.28;pointer-events:none;z-index:1}
.horizon{position:absolute;left:0;right:0;bottom:120px;height:120px;background:linear-gradient(180deg,transparent,rgba(246,178,107,.18));pointer-events:none;z-index:1}
.hero-grid{position:relative;z-index:2;display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center;padding:68px 0 80px}
.kicker{display:inline-flex;align-items:center;gap:8px;padding:6px 14px;border-radius:999px;background:rgba(246,178,107,.15);border:1px solid rgba(246,178,107,.35);font-size:12px;color:#fde2c0;margin-bottom:14px}
.kicker i{width:8px;height:8px;border-radius:50%;background:#f6b26b;box-shadow:0 0 0 4px rgba(246,178,107,.25)}
.hero h1{margin:0 0 14px;font-size:clamp(28px,4vw,46px);line-height:1.15;font-family:var(--serif);font-weight:700}
.hero-lead{margin:0 0 18px;color:#d5e2f0;font-size:15px;max-width:48ch}
.matrix{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}
.matrix span{padding:7px 12px;border-radius:999px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.14);font-size:12px;color:#e8eef8}
.platform-pills{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:20px}
.platform-pills button{border:1px solid rgba(255,255,255,.2);background:rgba(255,255,255,.06);color:#eef3fa;padding:8px 14px;border-radius:999px;cursor:pointer}
.platform-pills button.is-on{background:#fff;color:#1a2a3a;font-weight:700;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 22px;border-radius:999px;font-weight:700;border:1px solid transparent;cursor:pointer}
.btn-primary{background:var(--brand);color:#fff;box-shadow:0 12px 28px rgba(226,74,59,.35)}
.btn-primary:hover{background:var(--brand-d)}
.btn-ghost{background:transparent;color:#fff;border-color:rgba(255,255,255,.35)}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.btn-line{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-line:hover{border-color:var(--brand);color:var(--brand)}
.btn-sm{padding:9px 16px;font-size:13px}
.meta-row{display:flex;flex-wrap:wrap;gap:10px 18px;font-size:12px;color:#b8c7da;margin-bottom:14px}
.update-list{margin:0;padding-left:18px;color:#cdd8e8;font-size:13px}
.update-list li{margin:4px 0}
.mock-wrap{position:relative;perspective:1000px}
.mock{background:linear-gradient(180deg,#243447,#152030);border:1px solid rgba(255,255,255,.14);border-radius:20px;padding:14px;box-shadow:0 30px 60px rgba(0,0,0,.4);transform:rotateY(-5deg) rotateX(2deg)}
.mock-bar{height:12px;display:flex;gap:6px;margin-bottom:10px}
.mock-bar span{width:9px;height:9px;border-radius:50%;background:#6b7c90}
.mock-screen{display:grid;grid-template-columns:1.3fr .9fr;gap:8px;background:#0e1622;border-radius:14px;overflow:hidden;min-height:260px}
.mock-chart{padding:10px;position:relative}
.mock-chart img{width:100%;height:160px;object-fit:cover;border-radius:10px;opacity:.92}
.chart-line{position:absolute;left:16px;right:16px;top:50%;height:2px;background:linear-gradient(90deg,transparent,#f6b26b,transparent);opacity:.55}
.mock-side{border-left:1px solid rgba(255,255,255,.06);padding:10px;font-size:11px}
.mock-side h4{margin:0 0 8px;color:#c9daf0;font-weight:600;font-size:11px}
.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:#f8a9a0}
.badge-adfree{position:absolute;top:-8px;right:-6px;background:var(--brand);color:#fff;font-size:12px;font-weight:800;padding:10px 14px;transform:rotate(12deg);border-radius:10px;box-shadow:0 10px 24px rgba(226,74,59,.4);z-index:2}
.section{padding:72px 0}
.section-head{text-align:center;margin-bottom:36px}
.section-head h2{margin:0 0 10px;font-size:clamp(24px,3vw,34px);font-family:var(--serif)}
.section-head p{margin:0 auto;max-width:56ch;color:var(--muted)}
.brand-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px;margin-bottom:36px}
.brand-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:24px;box-shadow:0 12px 32px rgba(30,58,95,.06);position:relative;overflow:hidden}
.brand-card::before{content:"";position:absolute;top:0;left:0;right:0;height:4px;background:linear-gradient(90deg,var(--dawn),var(--brand))}
.brand-card:nth-child(2)::before{background:linear-gradient(90deg,var(--sky),var(--navy))}
.brand-card:nth-child(3)::before{background:linear-gradient(90deg,var(--brand),#ff7a5c)}
.brand-card h3{margin:0 0 8px;font-size:18px;font-family:var(--serif)}
.brand-card p{margin:0;color:var(--muted);font-size:14px}
.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,#fffdf9 0%,#fff0ec 100%);border:1px solid #f0d2cb;border-radius:var(--r);padding:28px;box-shadow:var(--sh)}
.ribbon{position:absolute;top:18px;left:-32px;background:var(--brand);color:#fff;font-size:12px;font-weight:800;padding:6px 40px;transform:rotate(-45deg)}
.plat-icon{width:64px;height:64px;border-radius:16px;background:linear-gradient(145deg,#ff7a5c,var(--brand));color:#fff;display:grid;place-items:center;font-size:24px;font-weight:800}
.plat-pc h3{margin:0 0 6px;font-size:22px;font-family:var(--serif)}
.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:1px solid var(--line);border-radius:var(--r);padding:22px;text-align:center}
.plat-card .ico{width:48px;height:48px;margin:0 auto 12px;border-radius:14px;background:#eef5fb;display:grid;place-items:center;font-size:16px;font-weight:800;color:var(--navy)}
.plat-card h3{margin:0 0 6px;font-size:17px;font-family:var(--serif)}
.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:1px solid var(--line);border-radius:24px;overflow:hidden;box-shadow:var(--sh)}
.feat:nth-child(even) .feat-media{order:2}
.feat-media{min-height:240px;background:#1e3a5f}
.feat-media img{width:100%;height:100%;object-fit:cover;min-height:240px}
.feat-body{padding:28px}
.feat-body .tag{display:inline-block;padding:4px 12px;border-radius:999px;background:#fff0ec;color:var(--brand);font-size:12px;font-weight:700;margin-bottom:10px}
.feat-body h3{margin:0 0 10px;font-size:22px;font-family:var(--serif)}
.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:#fffdf9;border:1px solid var(--line);border-radius:16px;padding:14px 16px}
.more-feats summary{cursor:pointer;font-weight:700;list-style:none;font-family:var(--serif)}
.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,#5b21b6 0%,#c2410c 55%,#ea580c 100%);color:#fff;padding:72px 0;position:relative;overflow:hidden}
.community::before{content:"";position:absolute;inset:0;background:radial-gradient(circle at 20% 20%,rgba(246,178,107,.25),transparent 40%);pointer-events:none}
.community .wrap{position:relative;z-index:1}
.community .section-head p{color:rgba(255,255,255,.88)}
.phones{display:grid;grid-template-columns:repeat(2,minmax(0,320px));gap:28px;justify-content:center}
.phone{background:#1a2433;border-radius:32px;padding:12px;border:3px solid rgba(255,255,255,.28);box-shadow:0 24px 50px rgba(0,0,0,.25)}
.phone-notch{width:96px;height:8px;border-radius:999px;background:#334155;margin:4px auto 10px}
.feed{background:#243044;border-radius:22px;overflow:hidden}
.feed img{width:100%;height:180px;object-fit:cover}
.feed-body{padding:14px}
.feed-body h4{margin:0 0 6px;font-size:15px;font-family:var(--serif)}
.feed-body p{margin:0;font-size:12px;color:#d7e0ec}
.site-footer{background:#152238;color:#a8b6c8;padding:56px 0 28px;font-size:13px}
.qr-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:32px}
.qr{background:#1e3148;border:1px solid #2a425c;border-radius:16px;padding:16px;text-align:center;color:#e8eef8}
.qr-box{width:88px;height:88px;margin:0 auto 10px;border-radius:12px;background:repeating-conic-gradient(#2a425c 0% 25%,#1e3148 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-family:var(--serif)}
.footer-links a{display:block;padding:3px 0;color:#a8b6c8}
.footer-links a:hover{color:#f6b26b}
.foot-meta{border-top:1px solid #2a425c;padding-top:18px;display:flex;flex-wrap:wrap;gap:10px 20px;justify-content:space-between;color:#7f90a5}
.page-hero{padding:48px 0 24px;background:linear-gradient(180deg,#fff0ec,#f4f1ec)}
.page-hero h1{margin:0 0 10px;font-size:clamp(26px,3vw,36px);font-family:var(--serif)}
.page-hero p{margin:0;color:var(--muted);max-width:62ch}
.card-list{display:grid;gap:14px}
.dl-card,.faq-item{background:#fffdf9;border:1px solid var(--line);border-radius:18px;padding:22px;box-shadow:0 10px 28px rgba(30,58,95,.05)}
.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-family:var(--serif)}
.dl-card p,.faq-item p{margin:0;color:var(--muted);font-size:14px}
.crumbs{font-size:13px;color:var(--muted);margin-bottom:12px}
.crumbs a{color:var(--brand)}
.note{font-size:12px;color:var(--muted);margin-top:8px}
@media (max-width:960px){
  .hero-grid,.feat,.plat-pc,.dl-card,.brand-grid{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}