:root{
  --green:#0e8f6f;
  --green-deep:#0a6b53;
  --green-soft:#e6f4ef;
  --mint:#f2faf7;
  --ink:#111513;
  --ink-2:#3d4744;
  --ink-3:#6b7672;
  --line:#e4e9e7;
  --white:#ffffff;
  --radius:14px;
  --shadow:0 1px 2px rgba(17,21,19,.04),0 8px 24px rgba(17,21,19,.05);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--white);
  line-height:1.7;
  font-size:16px;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
ul{list-style:none}
.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 20px}
.eyebrow{
  display:inline-block;font-size:13px;font-weight:600;letter-spacing:.08em;
  color:var(--green);background:var(--green-soft);
  padding:4px 12px;border-radius:999px;margin-bottom:16px;
}
h1,h2,h3{color:var(--ink);letter-spacing:-.01em;line-height:1.3}
h2{font-size:30px;font-weight:800;margin-bottom:14px}
h3{font-size:18px;font-weight:700;margin-bottom:8px}
.lead{color:var(--ink-2);font-size:17px;max-width:680px}
.muted{color:var(--ink-3);font-size:14px}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:60;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(10px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  height:66px;gap:20px;
}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.brand img{height:34px;width:auto;border-radius:8px}
.nav{display:flex;align-items:center;gap:26px}
.nav a{font-size:15px;color:var(--ink-2);font-weight:500;transition:color .2s}
.nav a:hover{color:var(--green)}
.nav-cta{
  background:var(--green);color:#fff !important;font-weight:600;
  padding:9px 18px;border-radius:10px;font-size:14.5px;
}
.nav-cta:hover{background:var(--green-deep)}
.menu-btn{
  display:none;width:42px;height:42px;border:1px solid var(--line);
  background:#fff;border-radius:10px;cursor:pointer;
  align-items:center;justify-content:center;flex-direction:column;gap:5px;
}
.menu-btn span{display:block;width:18px;height:2px;background:var(--ink);border-radius:2px}

/* ---------- hero ---------- */
.hero{
  position:relative;overflow:hidden;
  padding:72px 0 64px;
  background:linear-gradient(180deg,#f7fcfa 0%,#ffffff 100%);
}
.hero::before{
  content:"";position:absolute;top:-180px;right:-140px;
  width:520px;height:520px;border-radius:50%;
  background:radial-gradient(circle,rgba(14,143,111,.14),rgba(14,143,111,0) 70%);
}
.hero-grid{
  position:relative;display:grid;grid-template-columns:1.05fr .95fr;
  gap:56px;align-items:center;
}
.hero h1{font-size:46px;font-weight:900;margin-bottom:18px}
.hero h1 .hl{color:var(--green)}
.hero .lead{font-size:17.5px;margin-bottom:26px}
.hero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:30px}
.hero-tags span{
  font-size:13.5px;color:var(--green-deep);background:var(--green-soft);
  border-radius:8px;padding:6px 12px;font-weight:600;
}
.btn-row{display:flex;flex-wrap:wrap;gap:14px;align-items:center}
.btn{
  display:inline-flex;align-items:center;gap:9px;
  font-size:15.5px;font-weight:700;border-radius:12px;
  padding:14px 26px;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .18s ease,background .18s;
  cursor:pointer;
}
.btn-android{background:var(--green);color:#fff;box-shadow:0 8px 20px rgba(14,143,111,.24)}
.btn-android:hover{background:var(--green-deep);transform:translateY(-2px);box-shadow:0 12px 26px rgba(14,143,111,.3)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{border-color:var(--green);color:var(--green)}
.btn svg{width:18px;height:18px;flex:none}

/* hero visual slider */
.hero-visual{position:relative;min-height:430px}
.slides{
  position:relative;height:430px;border-radius:26px;
  background:linear-gradient(160deg,#e9f6f1,#f6fbf9);
  border:1px solid var(--line);overflow:hidden;
  display:flex;align-items:center;justify-content:center;
}
.slide{
  position:absolute;inset:0;display:flex;align-items:center;justify-content:center;
  padding:34px;opacity:0;transform:scale(.97);
  transition:opacity .6s ease,transform .6s ease;pointer-events:none;
}
.slide.is-active{opacity:1;transform:scale(1);pointer-events:auto}
.slide img{
  max-height:100%;width:auto;border-radius:16px;
  box-shadow:0 20px 46px rgba(10,80,62,.18);
  border:1px solid rgba(255,255,255,.8);
}
.slide-dots{
  position:absolute;bottom:18px;left:0;right:0;
  display:flex;justify-content:center;gap:8px;z-index:3;
}
.slide-dots button{
  width:8px;height:8px;border-radius:50%;border:0;cursor:pointer;
  background:rgba(14,143,111,.25);transition:.25s;padding:0;
}
.slide-dots button.is-active{background:var(--green);width:22px;border-radius:99px}

/* ---------- shared section ---------- */
.section{padding:84px 0}
.section.alt{background:var(--mint);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.section-head{max-width:720px;margin-bottom:44px}
.section-head p{color:var(--ink-2);margin-top:6px}

/* ---------- features: cards ---------- */
.feature-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:22px;
}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px 24px;box-shadow:var(--shadow);
  transition:transform .2s ease,border-color .2s;
  display:flex;flex-direction:column;
}
.feature-card:hover{transform:translateY(-4px);border-color:#bde3d6}
.feature-icon{
  width:44px;height:44px;border-radius:12px;background:var(--green-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
  color:var(--green);font-weight:800;font-size:18px;
}
.feature-card p{color:var(--ink-2);font-size:14.8px}
.feature-card .tagline{margin-top:12px;font-size:13px;color:var(--green-deep);font-weight:600}

/* ---------- screens: Z layout ---------- */
.screen-row{
  display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;
  margin-bottom:64px;
}
.screen-row:last-child{margin-bottom:0}
.screen-row.reverse .screen-text{order:2}
.screen-row.reverse .screen-shot{order:1}
.screen-text h3{font-size:24px;margin-bottom:12px}
.screen-text p{color:var(--ink-2);margin-bottom:14px}
.screen-list{display:flex;flex-direction:column;gap:9px}
.screen-list li{
  display:flex;gap:10px;font-size:14.8px;color:var(--ink-2);
}
.screen-list li::before{
  content:"";width:6px;height:6px;border-radius:50%;
  background:var(--green);flex:none;margin-top:9px;
}
.screen-shot{
  background:linear-gradient(160deg,#f3faf7,#e9f5f0);
  border:1px solid var(--line);border-radius:20px;
  padding:26px;display:flex;justify-content:center;
}
.screen-shot img{
  max-height:420px;width:auto;border-radius:14px;
  box-shadow:0 16px 36px rgba(10,80,62,.14);
  border:1px solid #fff;
}

/* ---------- guide: step ladder ---------- */
.ladder{display:flex;flex-direction:column;gap:0;position:relative}
.step{
  display:grid;grid-template-columns:88px 1fr;gap:28px;
  padding:28px 0;border-bottom:1px dashed var(--line);
  transition:background .2s;
}
.step:last-child{border-bottom:0}
.step-num{
  font-size:34px;font-weight:900;color:var(--green);
  opacity:.35;line-height:1;letter-spacing:-.03em;
}
.step-body h3{font-size:18.5px;margin-bottom:6px}
.step-body p{color:var(--ink-2);font-size:15px}
.step-body .kbd{
  display:inline-block;background:#f3f6f5;border:1px solid var(--line);
  border-radius:6px;padding:1px 8px;font-size:13px;color:var(--ink-2);
  margin:0 2px;
}

/* ---------- guide columns ---------- */
.guide-cols{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:44px}
.guide-col{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.guide-col h3{font-size:17px;margin-bottom:14px;color:var(--green-deep)}
.guide-col li{
  font-size:14.6px;color:var(--ink-2);padding:7px 0 7px 14px;
  position:relative;border-bottom:1px solid #f1f5f3;
}
.guide-col li:last-child{border-bottom:0}
.guide-col li::before{
  content:"";position:absolute;left:0;top:16px;
  width:5px;height:5px;border-radius:50%;background:var(--green);
}

/* ---------- feedback ---------- */
.feedback-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:22px}
.feedback-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;box-shadow:var(--shadow);display:flex;gap:16px;
}
.avatar{
  width:48px;height:48px;border-radius:50%;flex:none;
  border:2px solid var(--green-soft);background:#fff;
  object-fit:contain;padding:4px;
}
.feedback-card .who{font-weight:700;font-size:15px}
.feedback-card .role{font-size:12.5px;color:var(--ink-3);margin-bottom:8px}
.feedback-card blockquote{font-size:14.8px;color:var(--ink-2);line-height:1.75}

/* ---------- security ---------- */
.security-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.security-list{display:flex;flex-direction:column;gap:18px;margin-top:26px}
.security-item{
  display:flex;gap:14px;align-items:flex-start;
  background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px 20px;
}
.security-item .dot{
  width:30px;height:30px;border-radius:9px;background:var(--green-soft);
  color:var(--green);font-weight:800;display:flex;align-items:center;
  justify-content:center;flex:none;font-size:14px;
}
.security-item h3{font-size:15.5px;margin-bottom:3px}
.security-item p{font-size:14px;color:var(--ink-2)}
.security-card{
  background:linear-gradient(165deg,#0e8f6f,#0a6b53);
  color:#fff;border-radius:22px;padding:36px 32px;
  box-shadow:0 20px 40px rgba(10,107,83,.24);
}
.security-card h3{color:#fff;font-size:21px;margin-bottom:14px}
.security-card p{color:rgba(255,255,255,.86);font-size:15px;margin-bottom:18px}
.security-card ul li{
  font-size:14.4px;color:rgba(255,255,255,.92);
  padding:7px 0 7px 22px;position:relative;
}
.security-card ul li::before{
  content:"";position:absolute;left:0;top:15px;
  width:9px;height:9px;border-radius:50%;
  border:2px solid rgba(255,255,255,.7);
}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:14px;max-width:880px;margin:0 auto}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:0 22px;transition:border-color .2s;
}
.faq-item[open]{border-color:#bde3d6}
.faq-item summary{
  cursor:pointer;list-style:none;padding:18px 0;
  font-weight:700;font-size:15.8px;color:var(--ink);
  display:flex;justify-content:space-between;align-items:center;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary::after{
  content:"+";font-size:20px;font-weight:400;color:var(--green);
  transition:transform .2s;flex:none;
}
.faq-item[open] summary::after{transform:rotate(45deg)}
.faq-item .answer{padding:0 0 18px;color:var(--ink-2);font-size:14.8px}

/* ---------- download ---------- */
.download{
  background:linear-gradient(180deg,#f7fcfa,#eef8f4);
  border-top:1px solid var(--line);
  padding:84px 0 72px;
}
.download-inner{
  display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;
}
.download h2{font-size:32px;margin-bottom:14px}
.download .lead{margin-bottom:30px}
.install-steps{display:flex;flex-direction:column;gap:16px;margin-bottom:30px}
.install-step{display:flex;gap:14px;align-items:flex-start}
.install-step .num{
  width:26px;height:26px;border-radius:50%;background:var(--green);color:#fff;
  font-size:13px;font-weight:800;display:flex;align-items:center;
  justify-content:center;flex:none;margin-top:2px;
}
.install-step p{font-size:14.8px;color:var(--ink-2)}
.install-step strong{color:var(--ink)}
.qr-box{
  background:#fff;border:1px solid var(--line);border-radius:22px;
  padding:30px;text-align:center;box-shadow:var(--shadow);
}
.qr-box img{width:100%;max-width:230px;margin:0 auto 16px;border-radius:12px}
.qr-box p{font-size:14px;color:var(--ink-2);line-height:1.6}

/* ---------- footer ---------- */
.site-footer{
  background:#0f1513;color:#c7d2ce;padding:56px 0 30px;font-size:14px;
}
.footer-top{
  display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;
  padding-bottom:34px;border-bottom:1px solid rgba(255,255,255,.1);
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.footer-brand img{height:30px;border-radius:7px}
.footer-brand span{color:#fff;font-weight:800;font-size:18px}
.footer-top p{color:#93a29d;line-height:1.75;max-width:360px}
.footer-col h4{color:#fff;font-size:14.5px;margin-bottom:14px;font-weight:700}
.footer-col li{margin-bottom:8px}
.footer-col a{color:#93a29d;font-size:13.8px;transition:color .2s}
.footer-col a:hover{color:#7fd8bd}
.footer-bottom{
  display:flex;flex-wrap:wrap;justify-content:space-between;gap:12px;
  padding-top:24px;font-size:12.8px;color:#7b8a85;
}
.footer-bottom time{color:#7b8a85}

/* ---------- baidu modal ---------- */
.modal-mask{
  position:fixed;inset:0;background:rgba(15,21,19,.55);z-index:200;
  display:none;align-items:center;justify-content:center;padding:20px;
}
.modal-mask.show{display:flex}
.modal{
  background:#fff;border-radius:18px;max-width:420px;width:100%;
  padding:28px 24px;text-align:center;
  box-shadow:0 30px 60px rgba(0,0,0,.25);
}
.modal h3{font-size:17px;line-height:1.55;margin-bottom:18px}
.modal .copy-url{
  background:#f3f7f5;border:1px solid var(--line);border-radius:10px;
  padding:12px;font-size:13px;color:var(--ink-2);word-break:break-all;
  margin-bottom:16px;
}
.modal .btn{width:100%;justify-content:center;margin-bottom:10px}
.modal .close-btn{
  background:none;border:0;color:var(--ink-3);font-size:14px;
  cursor:pointer;padding:6px;
}
.modal .copied-tip{font-size:13px;color:var(--green);height:18px;margin-bottom:8px}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero h1{font-size:38px}
  .hero-grid{gap:36px}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .guide-cols{grid-template-columns:1fr 1fr}
  .security-grid,.download-inner{grid-template-columns:1fr;gap:38px}
  .footer-top{grid-template-columns:1fr 1fr}
}
@media (max-width:768px){
  body{font-size:15.5px}
  .wrap{padding:0 18px}
  .nav{
    position:absolute;top:66px;left:0;right:0;
    background:#fff;border-bottom:1px solid var(--line);
    flex-direction:column;align-items:stretch;gap:0;padding:8px 18px 18px;
    display:none;
  }
  .nav.open{display:flex}
  .nav a{padding:12px 4px;border-bottom:1px solid #f1f5f3;font-size:15px}
  .nav a:last-child{border-bottom:0}
  .nav-cta{text-align:center;margin-top:10px;background:var(--green);color:#fff !important}
  .menu-btn{display:flex}
  .hero{padding:44px 0 44px}
  .hero-grid{grid-template-columns:1fr;gap:34px}
  .hero h1{font-size:30px}
  .hero .lead{font-size:16px}
  .hero-visual{min-height:0}
  .slides{height:360px}
  .section{padding:56px 0}
  h2{font-size:24px}
  .feature-grid{grid-template-columns:1fr}
  .screen-row{grid-template-columns:1fr;gap:24px;margin-bottom:44px}
  .screen-row.reverse .screen-text{order:1}
  .screen-row.reverse .screen-shot{order:2}
  .screen-text h3{font-size:20px}
  .screen-shot img{max-height:340px}
  .guide-cols{grid-template-columns:1fr}
  .feedback-grid{grid-template-columns:1fr}
  .step{grid-template-columns:52px 1fr;gap:16px;padding:22px 0}
  .step-num{font-size:26px}
  .security-card{padding:28px 22px}
  .download{padding:56px 0 48px}
  .download h2{font-size:25px}
  .footer-top{grid-template-columns:1fr;gap:28px}
  .footer-bottom{flex-direction:column;gap:6px}
  .btn-row{flex-direction:column;align-items:stretch}
  .btn{justify-content:center}
  .qr-box{padding:22px}
  .qr-box img{max-width:180px}
}