:root{
  --bg:#ffffff;
  --ink:#172033;
  --muted:#647086;
  --line:#e8edf4;
  --soft:#f7f9fc;
  --navy:#18284a;
  --orange:#ff7a1a;
  --orange-dark:#e95f00;
  --shadow:0 18px 45px rgba(24,40,74,.08);
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC","Noto Sans SC",Arial,sans-serif;line-height:1.7}
a{color:inherit;text-decoration:none}
.wrap{width:min(1240px,calc(100% - 40px));margin:0 auto}
.site-header{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:saturate(140%) blur(12px)}
.header-inner{height:86px;display:flex;align-items:center;justify-content:space-between;gap:32px}
.brand{display:flex;align-items:center;gap:12px;font-weight:800;color:var(--navy)}
.text-brand{font-size:24px;letter-spacing:.02em}
.brand-logo{display:block;width:224px;height:auto}
.brand-mark{width:42px;height:42px;display:grid;place-items:center;border-radius:14px;background:linear-gradient(135deg,var(--orange),#ffb15c);color:#fff;box-shadow:0 10px 24px rgba(255,122,26,.26)}
.brand-text{font-size:inherit;letter-spacing:.02em}
.site-nav{display:flex;align-items:center;gap:30px;font-size:16px;color:#33405a}
.site-nav a:hover{color:var(--orange-dark)}
.hero{position:relative;overflow:hidden;padding:72px 0 72px;background:radial-gradient(circle at 82% 15%,#ffe6ce 0,rgba(255,230,206,0) 30%),linear-gradient(180deg,#fff 0,#f8fbff 100%)}
.hero:before{content:"";position:absolute;inset:auto -6% -30% auto;width:520px;height:520px;border-radius:50%;background:#eef5ff}
.hero-grid{position:relative;display:grid;grid-template-columns:minmax(0,1fr) minmax(360px,.72fr);align-items:start;gap:96px}
.hero-copy h1{margin:0;color:#111b2f;font-size:50px;line-height:1.16;letter-spacing:-.03em}
.hero-copy p{max-width:720px;margin:24px 0 0;color:var(--muted);font-size:19px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}
.btn{display:inline-flex;align-items:center;justify-content:center;min-width:132px;height:48px;padding:0 22px;border-radius:999px;font-size:16px;font-weight:700;cursor:default;user-select:none}
.btn.primary{background:var(--orange);color:#fff;box-shadow:0 14px 30px rgba(255,122,26,.24)}
.btn.secondary{background:#fff;color:var(--navy);border:1px solid var(--line)}
.hero-points{display:grid;gap:8px;margin:26px 0 0;padding:0;list-style:none;color:#536078;font-size:15px}
.hero-points li{position:relative;padding-left:20px}
.hero-points li:before{content:"";position:absolute;left:0;top:.72em;width:8px;height:8px;border-radius:50%;background:var(--orange)}
.hero-device{display:flex;justify-content:center;margin-top:-66px}
.hero-carousel{position:relative;width:min(350px,100%);border-radius:36px;background:#fff;padding:16px;box-shadow:0 26px 65px rgba(24,40,74,.12),0 42px 110px rgba(24,40,74,.20);overflow:hidden}
.carousel-track{position:relative;aspect-ratio:9/16;border-radius:26px;overflow:hidden;background:#f4f8ff}
.carousel-track img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;opacity:0;transform:scale(1.015);transition:opacity .55s ease,transform .8s ease}
.carousel-track img.is-active{opacity:1;transform:scale(1)}
.carousel-dots{display:flex;justify-content:center;gap:8px;margin-top:12px}
.carousel-dots button{width:9px;height:9px;border:0;border-radius:999px;background:#c9d4e5;padding:0;cursor:pointer}
.carousel-dots button.is-active{width:28px;background:var(--orange)}
.device-card{width:min(390px,100%);border:1px solid rgba(255,255,255,.7);border-radius:34px;background:linear-gradient(155deg,#1e3159,#0f1728);padding:18px;box-shadow:var(--shadow),0 28px 80px rgba(24,40,74,.22)}
.device-top{display:flex;gap:7px;padding:4px 4px 14px}
.device-top span{width:10px;height:10px;border-radius:50%;background:rgba(255,255,255,.38)}
.screen{min-height:280px;border-radius:24px;padding:30px;background:linear-gradient(180deg,#fff 0,#f2f6ff 100%);display:flex;flex-direction:column;justify-content:center}
.screen strong{font-size:30px;line-height:1.2;color:var(--navy)}
.screen p{margin:12px 0 34px;color:var(--muted)}
.signal-row{display:flex;align-items:flex-end;gap:10px;height:74px}
.signal-row i{flex:1;border-radius:14px 14px 8px 8px;background:linear-gradient(180deg,#ffac5d,var(--orange))}
.signal-row i:nth-child(1){height:34px}.signal-row i:nth-child(2){height:52px}.signal-row i:nth-child(3){height:70px}.signal-row i:nth-child(4){height:44px}
.feature-section,.guide-section,.update-section,.content-section{padding:72px 0}
.section-head{text-align:center;max-width:790px;margin:0 auto 34px}
.section-head.left{text-align:left;margin-left:0}
.section-head h2,.panel h2,.download-band h2{margin:0;color:#111b2f;font-size:34px;line-height:1.25}
.section-head p,.panel p,.guide-card p,.download-band p{margin:14px 0 0;color:var(--muted)}
.feature-grid{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:18px}
.feature-grid article,.guide-card,.panel{background:#fff;border:1px solid var(--line);border-radius:24px;padding:26px;box-shadow:0 12px 32px rgba(24,40,74,.05)}
.feature-grid h3,.guide-card h2,.list-panel h3{margin:0 0 10px;color:#15213a;font-size:21px;line-height:1.3}
.feature-grid p{margin:0;color:var(--muted);font-size:15px}
.single-hero{padding-bottom:76px}
.download-card{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.download-card>div{border:1px solid var(--line);border-radius:24px;background:#fff;padding:26px;box-shadow:0 12px 32px rgba(24,40,74,.05)}
.download-card h3,.steps-panel h3,.faq-grid h3{margin:0 0 10px;color:#15213a;font-size:21px;line-height:1.3}
.download-card p,.steps-panel p,.faq-grid p{margin:0;color:var(--muted)}
.steps-panel ol{margin:0;padding-left:22px;color:var(--muted)}
.steps-panel li{margin:0 0 12px}
.steps-panel li:last-child{margin-bottom:0}
.steps-panel strong{color:#15213a}
.content-section{background:var(--soft)}
.two-col{display:grid;grid-template-columns:.86fr 1.14fr;gap:22px;align-items:stretch}
.panel.strong{background:linear-gradient(145deg,#18284a,#223a69);color:#fff}
.panel.strong h2,.panel.strong p{color:#fff}
.text-link,.guide-card a{display:inline-flex;margin-top:22px;color:var(--orange-dark);font-weight:700}
.panel.strong .text-link{color:#ffd2a8}
.list-panel ul{margin:0;padding:0;list-style:none}
.list-panel li{border-bottom:1px dashed var(--line)}
.list-panel li:last-child{border-bottom:0}
.list-panel a{display:flex;align-items:center;gap:16px;padding:12px 0;color:#263249}
.list-panel a:hover{color:var(--orange-dark)}
.list-panel span{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.list-panel em{margin-left:auto;flex:none;color:#98a2b3;font-style:normal;font-size:13px}
.guide-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:20px}
.update-section{background:linear-gradient(180deg,#fff 0,#f7f9fc 100%)}
.update-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.update-layout{display:grid;grid-template-columns:.72fr 1.28fr;gap:34px;align-items:start}
.update-layout h2{margin:0;color:#111b2f;font-size:34px;line-height:1.25}
.update-layout p{color:var(--muted)}
.timeline{display:grid;gap:16px}
.timeline>div{position:relative;border:1px solid var(--line);border-radius:22px;background:#fff;padding:22px 24px 22px 28px;box-shadow:0 12px 32px rgba(24,40,74,.05)}
.timeline>div:before{content:"";position:absolute;left:-1px;top:22px;width:4px;height:44px;border-radius:99px;background:var(--orange)}
.timeline time{display:block;color:var(--orange-dark);font-weight:700;font-size:14px}
.timeline strong{display:block;margin-top:4px;color:#15213a;font-size:20px}
.timeline p{margin:8px 0 0}
.faq-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:20px}
.faq-grid article{border:1px solid var(--line);border-radius:24px;background:#fff;padding:26px;box-shadow:0 12px 32px rgba(24,40,74,.05)}
.download-band{padding:62px 0;background:var(--navy);color:#fff}
.download-inner{display:flex;align-items:center;justify-content:space-between;gap:28px}
.download-band h2,.download-band p{color:#fff}
.download-actions{display:flex;gap:12px;flex-wrap:wrap;justify-content:flex-end}
.site-footer{padding:38px 0;background:#0f1728;color:#d9e2f2}
.footer-grid{display:flex;justify-content:space-between;gap:30px}
.site-footer p{margin:8px 0 0;color:#9aa8bf}
.footer-links{display:flex;gap:16px;flex-wrap:wrap;justify-content:flex-end;color:#c7d2e6}
.footer-links a:hover{color:#fff}
@media (max-width:920px){
  .header-inner{height:auto;padding:16px 0;align-items:flex-start;flex-direction:column}
  .brand-logo{width:194px}
  .site-nav{gap:14px;flex-wrap:wrap}
  .hero{padding:56px 0}
  .hero-grid,.two-col,.update-grid,.update-layout{grid-template-columns:1fr}
  .hero-device{justify-content:center;margin-top:28px}
  .hero-carousel{width:min(390px,100%)}
  .hero-copy h1{font-size:36px}
  .feature-grid,.guide-grid,.download-card,.faq-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .download-inner,.footer-grid{align-items:flex-start;flex-direction:column}
  .download-actions,.footer-links{justify-content:flex-start}
}
@media (max-width:620px){
  .wrap{width:min(100% - 28px,1180px)}
  .text-brand{font-size:21px}
  .site-nav{font-size:14px}
  .hero-copy h1{font-size:30px}
  .brand-logo{width:176px}
  .hero-carousel{border-radius:26px;padding:10px;width:min(340px,100%)}
  .carousel-track{border-radius:19px;aspect-ratio:9/16}
  .hero-copy p{font-size:16px}
  .feature-section,.guide-section,.update-section,.content-section{padding:48px 0}
  .feature-grid,.guide-grid,.download-card,.faq-grid{grid-template-columns:1fr}
  .section-head h2,.panel h2,.download-band h2{font-size:27px}
  .list-panel a{display:block}
  .list-panel em{display:block;margin:2px 0 0}
}