:root{
  --green:#1f9d78;
  --green-dark:#16795c;
  --green-soft:#e8f5f0;
  --ink:#111413;
  --ink-2:#3d4442;
  --ink-3:#6b7472;
  --line:#e3e8e6;
  --bg:#ffffff;
  --bg-soft:#f7faf9;
  --bg-mint:#f1f9f5;
  --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.7;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block;}
a{color:inherit;text-decoration:none;}
.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 20px;}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.94);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex;align-items:center;justify-content:space-between;
  gap:16px;height:64px;
}
.brand{display:flex;align-items:center;gap:10px;flex-shrink:0;}
.brand img{height:32px;width:auto;}
.brand-name{font-size:19px;font-weight:800;letter-spacing:-.3px;}
.nav{display:flex;align-items:center;gap:4px;flex-wrap:nowrap;overflow-x:auto;}
.nav a{
  font-size:14px;color:var(--ink-2);padding:7px 11px;border-radius:9px;
  white-space:nowrap;transition:background .2s,color .2s;
}
.nav a:hover{background:var(--green-soft);color:var(--green-dark);}
.nav-toggle{
  display:none;background:var(--green-soft);border:0;color:var(--green-dark);
  font-size:14px;font-weight:700;padding:8px 14px;border-radius:10px;cursor:pointer;
}

/* ---------- hero ---------- */
.hero{
  background:
    radial-gradient(900px 380px at 88% -10%, #e6f6ef 0%, rgba(230,246,239,0) 65%),
    linear-gradient(180deg,#fbfdfc 0%, #ffffff 100%);
  border-bottom:1px solid var(--line);
  overflow:hidden;
}
.hero-inner{
  display:grid;grid-template-columns:1.05fr .95fr;gap:56px;
  align-items:center;padding:64px 0 70px;
}
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  background:#fff;border:1px solid var(--line);
  padding:6px 14px;border-radius:999px;
  font-size:13px;color:var(--green-dark);font-weight:600;
  box-shadow:0 1px 2px rgba(17,20,19,.04);
}
.eyebrow .dot{width:7px;height:7px;border-radius:50%;background:var(--green);}
.hero h1{
  font-size:46px;line-height:1.18;font-weight:800;letter-spacing:-1.2px;
  margin:20px 0 18px;
}
.hero h1 em{font-style:normal;color:var(--green);}
.hero-lead{font-size:17px;color:var(--ink-2);max-width:520px;}
.hero-actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:28px;}
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  padding:13px 24px;border-radius:12px;font-size:15px;font-weight:700;
  transition:transform .18s, box-shadow .18s, background .18s;
  border:1px solid transparent;cursor:pointer;
}
.btn:active{transform:scale(.98);}
.btn-primary{background:var(--green);color:#fff;box-shadow:0 6px 18px rgba(31,157,120,.24);}
.btn-primary:hover{background:var(--green-dark);}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);}
.btn-ghost:hover{border-color:#c9d6d1;background:var(--bg-soft);}
.btn svg{width:17px;height:17px;}
.hero-points{
  display:flex;flex-wrap:wrap;gap:8px 20px;margin-top:26px;
  font-size:14px;color:var(--ink-3);
}
.hero-points span{display:inline-flex;align-items:center;gap:6px;}
.hero-points span::before{
  content:"";width:6px;height:6px;border-radius:50%;background:var(--green);
}

.hero-visual{position:relative;min-height:440px;}
.phone{
  position:absolute;width:224px;border-radius:26px;overflow:hidden;
  box-shadow:0 18px 40px rgba(17,20,19,.14);
  border:1px solid var(--line);background:#fff;
  animation:floaty 7s ease-in-out infinite;
}
.phone img{width:100%;height:auto;}
.phone-a{top:0;left:6%;z-index:3;}
.phone-b{top:52px;right:0;z-index:2;animation-delay:-2.2s;}
.phone-c{top:226px;left:32%;z-index:4;animation-delay:-4s;width:196px;}
@keyframes floaty{
  0%,100%{transform:translateY(0);}
  50%{transform:translateY(-12px);}
}

/* ---------- section base ---------- */
.section{padding:76px 0;}
.section-soft{background:var(--bg-soft);border-top:1px solid var(--line);border-bottom:1px solid var(--line);}
.section-mint{background:var(--bg-mint);border-top:1px solid #dcefe7;border-bottom:1px solid #dcefe7;}
.section-head{max-width:720px;margin-bottom:44px;}
.tag{
  display:inline-block;font-size:13px;font-weight:700;color:var(--green-dark);
  background:var(--green-soft);padding:4px 12px;border-radius:8px;margin-bottom:14px;
}
.section h2{font-size:33px;line-height:1.3;font-weight:800;letter-spacing:-.8px;}
.section h2 + p{margin-top:14px;color:var(--ink-2);font-size:16px;}
h3{font-size:18px;font-weight:700;line-height:1.45;}

/* ---------- features ---------- */
.feature-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:18px;
}
.feature-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:24px 22px;transition:transform .2s, box-shadow .2s, border-color .2s;
}
.feature-card:hover{transform:translateY(-4px);box-shadow:0 12px 26px rgba(17,20,19,.07);border-color:#cfe6dd;}
.feature-icon{
  width:40px;height:40px;border-radius:11px;background:var(--green-soft);
  display:flex;align-items:center;justify-content:center;margin-bottom:16px;
}
.feature-icon svg{width:20px;height:20px;stroke:var(--green-dark);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.feature-card h3{margin-bottom:8px;}
.feature-card p{font-size:14.5px;color:var(--ink-3);}

/* ---------- screens showcase ---------- */
.showcase-grid{
  display:grid;grid-template-columns:repeat(3,1fr);gap:26px;
}
.shot{
  background:#fff;border:1px solid var(--line);border-radius:18px;
  padding:14px 14px 0;overflow:hidden;
  box-shadow:0 2px 8px rgba(17,20,19,.04);
  transition:transform .25s, box-shadow .25s;
}
.shot:hover{transform:translateY(-6px);box-shadow:0 16px 34px rgba(17,20,19,.1);}
.shot-frame{
  border-radius:12px;overflow:hidden;border:1px solid var(--line);
  background:var(--bg-soft);
}
.shot-frame img{width:100%;height:auto;}
.shot-caption{padding:16px 4px 20px;}
.shot-caption h3{font-size:16px;margin-bottom:6px;}
.shot-caption p{font-size:13.5px;color:var(--ink-3);}

/* ---------- deep content zigzag ---------- */
.zigzag{display:flex;flex-direction:column;gap:24px;}
.zig-item{
  display:grid;grid-template-columns:1fr 1fr;gap:0;
  background:#fff;border:1px solid var(--line);border-radius:18px;overflow:hidden;
}
.zig-item:nth-child(even) .zig-media{order:2;}
.zig-media{background:var(--bg-mint);display:flex;align-items:center;justify-content:center;padding:22px;}
.zig-media img{
  border-radius:14px;border:1px solid var(--line);
  max-height:420px;width:auto;box-shadow:0 10px 24px rgba(17,20,19,.1);
}
.zig-body{padding:36px 38px;display:flex;flex-direction:column;justify-content:center;}
.zig-body h3{font-size:23px;letter-spacing:-.4px;margin-bottom:14px;}
.zig-body p{color:var(--ink-2);font-size:15.5px;margin-bottom:14px;}
.zig-list{list-style:none;display:flex;flex-direction:column;gap:10px;margin-top:4px;}
.zig-list li{
  font-size:14.5px;color:var(--ink-2);padding-left:22px;position:relative;
}
.zig-list li::before{
  content:"✓";position:absolute;left:0;top:0;color:var(--green);
  font-weight:800;font-size:13px;
}

/* ---------- ladder / ranked ---------- */
.ladder{display:flex;flex-direction:column;gap:14px;counter-reset:step;}
.ladder-row{
  display:grid;grid-template-columns:64px 1fr;gap:22px;align-items:center;
  background:#fff;border:1px solid var(--line);border-radius:14px;
  padding:20px 24px;transition:border-color .2s,box-shadow .2s;
}
.ladder-row:hover{border-color:#cfe6dd;box-shadow:0 10px 22px rgba(17,20,19,.06);}
.ladder-num{
  font-size:26px;font-weight:800;color:var(--green);
  letter-spacing:-1px;text-align:center;
  border-right:1px solid var(--line);padding-right:18px;
}
.ladder-row:nth-child(2) .ladder-num{color:#2aa886;}
.ladder-row:nth-child(3) .ladder-num{color:#43b694;}
.ladder-row:nth-child(n+4) .ladder-num{color:#7f8b88;}
.ladder-body h3{font-size:16.5px;margin-bottom:4px;}
.ladder-body p{font-size:14px;color:var(--ink-3);}

/* ---------- feedback ---------- */
.feedback-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;}
.feedback-card{
  background:#fff;border:1px solid var(--line);border-radius:16px;padding:24px;
  display:flex;flex-direction:column;gap:14px;
}
.stars{color:#e0a32b;font-size:14px;letter-spacing:2px;}
.feedback-card blockquote{
  font-size:15px;color:var(--ink-2);flex:1;
}
.feedback-user{display:flex;align-items:center;gap:11px;padding-top:12px;border-top:1px solid var(--line);}
.avatar{
  width:38px;height:38px;border-radius:50%;overflow:hidden;flex-shrink:0;
  background:var(--green-soft);display:flex;align-items:center;justify-content:center;
}
.avatar img{width:100%;height:100%;object-fit:cover;}
.feedback-user b{display:block;font-size:14px;}
.feedback-user span{font-size:12.5px;color:var(--ink-3);}

/* ---------- privacy ---------- */
.privacy-layout{display:grid;grid-template-columns:1fr 1fr;gap:22px;align-items:start;}
.privacy-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:26px;
}
.privacy-card h3{margin-bottom:12px;display:flex;align-items:center;gap:9px;}
.privacy-card h3 svg{width:19px;height:19px;stroke:var(--green-dark);fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.privacy-card p{font-size:14.5px;color:var(--ink-3);}
.privacy-card ul{list-style:none;display:flex;flex-direction:column;gap:8px;margin-top:12px;}
.privacy-card li{font-size:14.5px;color:var(--ink-2);padding-left:18px;position:relative;}
.privacy-card li::before{
  content:"";position:absolute;left:0;top:9px;width:6px;height:6px;
  border-radius:50%;background:var(--green);
}

/* ---------- faq ---------- */
.faq-list{display:flex;flex-direction:column;gap:12px;max-width:900px;margin:0 auto;}
.faq-item{
  background:#fff;border:1px solid var(--line);border-radius:12px;
  padding:0 22px;
}
.faq-item summary{
  list-style:none;cursor:pointer;padding:18px 0;
  font-weight:700;font-size:16px;display:flex;align-items:center;justify-content:space-between;gap:16px;
}
.faq-item summary::-webkit-details-marker{display:none;}
.faq-item summary::after{
  content:"+";font-size:20px;color:var(--green);font-weight:600;flex-shrink:0;
  transition:transform .2s;
}
.faq-item[open] summary::after{content:"−";}
.faq-item p{font-size:14.5px;color:var(--ink-3);padding:0 0 18px;}

/* ---------- download ---------- */
.download-section{
  background:linear-gradient(180deg,#ffffff 0%, var(--bg-mint) 100%);
  border-top:1px solid var(--line);
}
.download-shell{
  background:#fff;border:1px solid var(--line);border-radius:24px;
  padding:44px;box-shadow:0 18px 44px rgba(17,20,19,.07);
}
.download-head{text-align:center;max-width:640px;margin:0 auto 36px;}
.download-head h2{font-size:32px;letter-spacing:-.8px;}
.download-head p{color:var(--ink-2);margin-top:14px;font-size:16px;}
.download-body{
  display:grid;grid-template-columns:1.15fr .85fr;gap:40px;align-items:center;
}
.steps{list-style:none;display:flex;flex-direction:column;gap:16px;}
.steps li{display:grid;grid-template-columns:34px 1fr;gap:14px;align-items:start;}
.step-num{
  width:34px;height:34px;border-radius:10px;background:var(--green-soft);
  color:var(--green-dark);font-weight:800;font-size:14px;
  display:flex;align-items:center;justify-content:center;
}
.steps h3{font-size:15.5px;margin-bottom:3px;}
.steps p{font-size:14px;color:var(--ink-3);}
.download-actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px;}
.download-aside{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:18px;
  padding:26px;text-align:center;
}
.download-aside .qr{
  width:170px;margin:0 auto 16px;border-radius:12px;overflow:hidden;
  border:1px solid var(--line);background:#fff;padding:8px;
}
.download-aside h3{font-size:16px;margin-bottom:6px;}
.download-aside p{font-size:13.5px;color:var(--ink-3);}
.download-link-line{
  margin-top:16px;font-size:12.5px;color:var(--ink-3);word-break:break-all;
  background:#fff;border:1px dashed var(--line);border-radius:9px;padding:10px;
}

/* ---------- footer ---------- */
.site-footer{
  background:#0f1513;color:#c6d0cc;padding:56px 0 32px;
}
.footer-grid{
  display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:36px;
  padding-bottom:36px;border-bottom:1px solid #253029;
}
.footer-brand{display:flex;align-items:center;gap:10px;margin-bottom:14px;}
.footer-brand img{height:30px;width:auto;}
.footer-brand b{color:#fff;font-size:18px;font-weight:800;}
.site-footer p{font-size:14px;color:#9aa8a3;line-height:1.8;}
.footer-col h4{color:#fff;font-size:14px;margin-bottom:14px;font-weight:700;}
.footer-col ul{list-style:none;display:flex;flex-direction:column;gap:9px;}
.footer-col a{font-size:13.5px;color:#9aa8a3;transition:color .2s;}
.footer-col a:hover{color:#fff;}
.footer-bottom{
  display:flex;justify-content:space-between;align-items:center;gap:16px;
  padding-top:24px;flex-wrap:wrap;
}
.footer-bottom span{font-size:12.5px;color:#7d8a85;}
.footer-bottom time{font-size:12.5px;color:#7d8a85;}

/* ---------- copy modal ---------- */
.copy-modal{
  position:fixed;inset:0;z-index:200;display:none;
  align-items:center;justify-content:center;padding:20px;
  background:rgba(15,21,19,.5);
}
.copy-modal.is-open{display:flex;}
.copy-box{
  width:100%;max-width:420px;background:#fff;border-radius:18px;
  padding:26px;box-shadow:0 24px 60px rgba(0,0,0,.2);
}
.copy-box h3{font-size:17px;line-height:1.5;margin-bottom:16px;}
.copy-url{
  background:var(--bg-soft);border:1px solid var(--line);border-radius:10px;
  padding:12px;font-size:13px;color:var(--ink-2);word-break:break-all;margin-bottom:16px;
}
.copy-row{display:flex;gap:10px;}
.copy-row .btn{flex:1;padding:11px 16px;font-size:14px;}
.copy-tip{font-size:12.5px;color:var(--green-dark);margin-top:10px;min-height:18px;}

/* ---------- responsive ---------- */
@media (max-width:1024px){
  .hero-inner{grid-template-columns:1fr;gap:40px;padding:48px 0 56px;}
  .hero h1{font-size:38px;}
  .hero-visual{min-height:400px;max-width:520px;margin:0 auto;width:100%;}
  .feature-grid{grid-template-columns:repeat(2,1fr);}
  .showcase-grid{grid-template-columns:repeat(2,1fr);}
  .feedback-grid{grid-template-columns:repeat(2,1fr);}
  .download-body{grid-template-columns:1fr;gap:32px;}
  .footer-grid{grid-template-columns:1fr 1fr;}
  .nav-toggle{display:inline-flex;}
  .nav{
    display:none;position:absolute;left:0;right:0;top:64px;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:0 14px 30px rgba(17,20,19,.08);
    flex-direction:column;align-items:stretch;gap:2px;padding:12px 16px 18px;
    max-height:calc(100vh - 64px);overflow-y:auto;
  }
  .nav.is-open{display:flex;}
  .nav a{padding:11px 12px;font-size:15px;}
}
@media (max-width:768px){
  .wrap{padding:0 16px;}
  .header-inner{height:58px;}
  .brand img{height:28px;}
  .brand-name{font-size:17px;}
  .nav{top:58px;}
  .section{padding:52px 0;}
  .hero h1{font-size:30px;letter-spacing:-.6px;}
  .hero-lead{font-size:15.5px;}
  .hero-actions{flex-direction:column;align-items:stretch;}
  .hero-actions .btn{width:100%;}
  .hero-visual{min-height:360px;}
  .phone{width:170px;border-radius:20px;}
  .phone-a{left:0;}
  .phone-b{right:0;top:40px;}
  .phone-c{top:190px;left:28%;width:150px;}
  .section h2{font-size:25px;letter-spacing:-.4px;}
  .feature-grid,.showcase-grid,.feedback-grid{grid-template-columns:1fr;}
  .zig-item{grid-template-columns:1fr;}
  .zig-item:nth-child(even) .zig-media{order:0;}
  .zig-media img{max-height:none;width:100%;}
  .zig-body{padding:26px 22px;}
  .zig-body h3{font-size:20px;}
  .ladder-row{grid-template-columns:44px 1fr;gap:14px;padding:16px 18px;}
  .ladder-num{font-size:20px;padding-right:12px;}
  .privacy-layout{grid-template-columns:1fr;}
  .download-shell{padding:26px 18px;border-radius:18px;}
  .download-head h2{font-size:24px;}
  .download-actions{flex-direction:column;align-items:stretch;}
  .download-actions .btn{width:100%;}
  .footer-grid{grid-template-columns:1fr;gap:26px;}
  .footer-bottom{flex-direction:column;align-items:flex-start;}
}
@media (max-width:400px){
  .hero h1{font-size:26px;}
  .phone-c{display:none;}
}