:root{
  --bg:#F2F2F7;
  --wash:#E8F1FF;
  --surface:#FFFFFF;
  --primary:#007AFF;
  --primary-light:#3AA0FF;
  --primary-dark:#0056CC;
  --text:#1C1C1E;
  --text-secondary:#8E8E93;
  --divider:#C6C6C8;
  --online:#34C759;
  --danger:#FF3B30;
  --radius-pill:26px;
  --ease:cubic-bezier(.22,1,.36,1);
}
*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:system-ui,-apple-system,"Segoe UI",sans-serif;
  background:
    radial-gradient(900px 500px at 12% -8%, rgba(0,122,255,0.14), transparent 60%),
    radial-gradient(700px 460px at 100% 0%, rgba(0,122,255,0.10), transparent 55%),
    var(--bg);
  color:var(--text);
  line-height:1.5;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--primary);text-decoration:none;}
img{max-width:100%;display:block;}
.wrap{max-width:1120px;margin:0 auto;padding:0 24px;}
::selection{background:rgba(0,122,255,0.18);}
.reveal{opacity:0;transform:translateY(22px);transition:opacity .7s var(--ease),transform .7s var(--ease);}
.reveal.in{opacity:1;transform:translateY(0);}

header{
  position:sticky;top:0;z-index:50;
  background:rgba(242,242,247,0.7);
  backdrop-filter:saturate(190%) blur(22px);
  -webkit-backdrop-filter:saturate(190%) blur(22px);
  border-bottom:1px solid rgba(198,198,200,0.5);
}
nav.wrap{display:flex;align-items:center;justify-content:space-between;height:68px;}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--text);letter-spacing:-0.01em;}
.mark{
  width:36px;height:36px;border-radius:11px;
  background:linear-gradient(145deg,var(--primary-light),var(--primary-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;
  font-weight:800;font-size:14px;letter-spacing:0.3px;flex-shrink:0;
  box-shadow:0 4px 12px rgba(0,122,255,0.35),inset 0 1px 1px rgba(255,255,255,0.4);
}
.navlinks{display:flex;gap:8px;align-items:center;flex-wrap:wrap;}
.navlinks a:not(.cta){
  font-size:14.5px;font-weight:600;color:var(--text);padding:9px 14px;border-radius:20px;
  transition:background .2s var(--ease),color .2s var(--ease);
}
.navlinks a:not(.cta):hover{background:rgba(0,122,255,0.08);color:var(--primary);}
.navlinks a.cta{
  margin-left:6px;
  background:linear-gradient(135deg,var(--primary-light),var(--primary));
  color:#fff;padding:10px 20px;border-radius:var(--radius-pill);
  font-weight:700;font-size:14.5px;
  box-shadow:0 6px 16px rgba(0,122,255,0.3);
}
.navlinks a.cta:hover{transform:translateY(-1px);}
.navtoggle{display:none;background:none;border:none;cursor:pointer;padding:8px;}
.navtoggle span,.navtoggle span::before,.navtoggle span::after{
  content:"";display:block;width:22px;height:2px;background:var(--text);position:relative;transition:0.2s;border-radius:2px;
}
.navtoggle span::before{position:absolute;top:-7px;}
.navtoggle span::after{position:absolute;top:7px;}

.hero{padding:88px 0 30px;text-align:center;position:relative;}
.eyebrow{
  display:inline-flex;align-items:center;gap:7px;background:rgba(255,255,255,0.75);
  border:1px solid rgba(0,122,255,0.18);padding:7px 16px 7px 8px;border-radius:100px;
  font-size:12.5px;font-weight:700;color:var(--primary-dark);margin-bottom:26px;
}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--online);box-shadow:0 0 0 3px rgba(52,199,89,0.18);}
.hero h1{
  font-size:clamp(40px,8vw,62px);font-weight:800;letter-spacing:-0.03em;margin-bottom:16px;
  background:linear-gradient(160deg,#1C1C1E 30%,#46464A 100%);
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;
}
.hero .tagline{font-size:20px;color:var(--primary);font-weight:700;margin-bottom:14px;}
.hero p.desc{max-width:560px;margin:0 auto 34px;color:var(--text-secondary);font-size:16.5px;}
.btn-primary{
  display:inline-flex;align-items:center;gap:9px;
  background:linear-gradient(135deg,var(--primary-light),var(--primary) 60%,var(--primary-dark));
  color:#fff;font-weight:700;font-size:16.5px;
  padding:16px 32px;border-radius:var(--radius-pill);border:none;cursor:pointer;
  box-shadow:0 10px 26px rgba(0,122,255,0.35),inset 0 1px 1px rgba(255,255,255,0.35);
  transition:transform 0.2s var(--ease),box-shadow 0.2s var(--ease);
}
.btn-primary:hover{transform:translateY(-2px) scale(1.015);}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;margin-left:10px;
  background:rgba(255,255,255,0.8);color:var(--primary-dark);font-weight:700;
  padding:15px 22px;border-radius:var(--radius-pill);border:1px solid rgba(0,122,255,0.18);
}
.hero-actions{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;align-items:center;}
.hero-note{margin-top:16px;font-size:13.5px;color:var(--text-secondary);}

.phone-mock-wrap{display:flex;justify-content:center;margin:56px auto 10px;position:relative;}
.phone{
  width:270px;height:540px;background:linear-gradient(160deg,#1a1a1c,#050506);
  border-radius:46px;padding:12px;
  box-shadow:0 40px 80px rgba(0,0,0,0.22);position:relative;z-index:1;
}
.phone::before{
  content:"";position:absolute;top:22px;left:50%;transform:translateX(-50%);
  width:80px;height:22px;background:#050506;border-radius:14px;z-index:2;
}
.phone-screen{width:100%;height:100%;background:var(--surface);border-radius:36px;overflow:hidden;display:flex;flex-direction:column;}
.phone-topbar{
  height:56px;display:flex;align-items:center;gap:9px;padding:8px 16px 0;
  border-bottom:1px solid var(--divider);flex-shrink:0;
}
.phone-avatar{
  width:32px;height:32px;border-radius:50%;background:linear-gradient(145deg,var(--wash),#d8e9ff);color:var(--primary);
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:700;position:relative;
}
.phone-avatar::after{
  content:"";position:absolute;width:9px;height:9px;background:var(--online);border-radius:50%;
  border:2px solid #fff;bottom:-2px;right:-2px;
}
.phone-topbar .name{font-size:13px;font-weight:700;}
.phone-topbar .status{font-size:10px;color:var(--online);font-weight:600;}
.phone-body{flex:1;padding:16px 13px;display:flex;flex-direction:column;gap:9px;}
.bubble{max-width:78%;padding:10px 14px;border-radius:18px;font-size:12.5px;line-height:1.42;}
.bubble.received{background:#EFEFF1;color:var(--text);align-self:flex-start;border-bottom-left-radius:5px;}
.bubble.sent{background:linear-gradient(135deg,var(--primary-light),var(--primary));color:#fff;align-self:flex-end;border-bottom-right-radius:5px;}
.phone-bottom{height:52px;border-top:1px solid var(--divider);display:flex;align-items:center;padding:0 13px;}
.phone-input{
  flex:1;height:32px;background:#F0F0F2;border-radius:16px;font-size:11px;color:var(--text-secondary);
  display:flex;align-items:center;padding:0 13px;
}
.float-chip{
  position:absolute;z-index:2;background:#fff;border-radius:16px;padding:10px 16px;
  box-shadow:0 12px 28px rgba(0,0,0,0.12);display:flex;align-items:center;gap:9px;
  font-size:12.5px;font-weight:700;
}
.float-chip svg{width:16px;height:16px;}
.chip-left{top:14%;left:calc(50% - 240px);}
.chip-right{bottom:16%;right:calc(50% - 240px);}
@media (max-width:900px){.float-chip{display:none;}}

section{padding:76px 0;}
h2.section-title{font-size:clamp(28px,4.2vw,38px);font-weight:800;text-align:center;margin-bottom:12px;letter-spacing:-0.02em;}
p.section-sub{text-align:center;color:var(--text-secondary);max-width:560px;margin:0 auto 48px;font-size:16px;}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.feature-card{
  background:rgba(255,255,255,0.72);backdrop-filter:blur(14px);
  border:1px solid rgba(255,255,255,0.7);border-radius:22px;padding:30px 26px;
  box-shadow:0 4px 20px rgba(31,38,60,0.05);
}
.feature-icon{
  width:48px;height:48px;border-radius:14px;background:linear-gradient(145deg,var(--wash),#d9ecff);color:var(--primary);
  display:flex;align-items:center;justify-content:center;margin-bottom:18px;
}
.feature-icon svg{width:24px;height:24px;}
.feature-card h3{font-size:17.5px;font-weight:700;margin-bottom:7px;}
.feature-card p{font-size:14.5px;color:var(--text-secondary);}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:28px;}
.step{text-align:center;padding:10px;}
.step-num{
  width:46px;height:46px;border-radius:50%;
  background:linear-gradient(145deg,var(--primary-light),var(--primary-dark));
  color:#fff;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:17px;
  margin:0 auto 18px;
}
.step h3{font-size:16.5px;font-weight:700;margin-bottom:7px;}
.step p{font-size:14.5px;color:var(--text-secondary);max-width:230px;margin:0 auto;}

.delete-box,.contact-card{
  background:var(--surface);border-radius:28px;padding:36px 32px;
  box-shadow:0 8px 30px rgba(31,38,60,0.06);max-width:760px;margin:0 auto;
}
.delete-box h2,.contact-card h2{text-align:left;font-size:26px;margin-bottom:10px;}
.delete-box p,.contact-card p{color:var(--text);font-size:15.5px;margin-bottom:12px;}
.delete-box ol{margin:16px 0 18px 22px;}
.delete-box li{margin-bottom:8px;font-size:15.5px;}
.note{color:var(--text-secondary);font-size:14px;}
.email-pill{
  display:inline-flex;align-items:center;gap:10px;background:var(--wash);
  border:1px solid rgba(0,122,255,0.15);border-radius:16px;padding:12px 16px;font-weight:700;
}

.download-cta{
  text-align:center;position:relative;overflow:hidden;
  background:linear-gradient(155deg,#0b1e3a 0%,#073e8f 45%,var(--primary) 100%);
  border-radius:32px;padding:70px 24px;box-shadow:0 30px 60px rgba(0,86,204,0.3);
}
.download-cta h2{font-size:clamp(26px,4vw,34px);font-weight:800;margin-bottom:12px;color:#fff;}
.download-cta p{color:rgba(255,255,255,0.78);margin-bottom:30px;font-size:15.5px;}
.download-cta .btn-primary{background:#fff;color:var(--primary-dark);box-shadow:0 12px 30px rgba(0,0,0,0.22);}
.download-cta .btn-primary svg path{stroke:var(--primary-dark);}

footer{padding:48px 0 34px;text-align:center;}
.footer-brand{display:flex;align-items:center;justify-content:center;gap:9px;margin-bottom:22px;font-weight:800;font-size:16px;}
.footer-links{display:flex;justify-content:center;gap:26px;flex-wrap:wrap;margin-bottom:18px;font-size:14px;}
.footer-links a{color:var(--text-secondary);font-weight:600;}
.footer-links a:hover{color:var(--primary);}
.copyright{font-size:13px;color:var(--text-secondary);}
.ok{color:var(--online);font-weight:700;}

.legal-page .wrap{max-width:820px;padding:32px 20px 72px;}
.legal-page h1{font-size:32px;margin:12px 0 8px;}
.legal-page h2{font-size:20px;margin:32px 0 10px;}
.legal-page h3{font-size:16px;margin:20px 0 8px;}
.legal-page p,.legal-page li{font-size:15.5px;}
.legal-page ul,.legal-page ol{margin:8px 0 16px 22px;}
.legal-page .muted{color:var(--text-secondary);}
.legal-page .card{
  background:var(--surface);border-radius:22px;padding:18px 20px;margin:16px 0;
}
.legal-page table{width:100%;border-collapse:collapse;font-size:14px;margin:12px 0;}
.legal-page th,.legal-page td{text-align:left;vertical-align:top;padding:10px 8px;border-bottom:1px solid var(--divider);}
.legal-page nav.toc a{display:inline-block;margin:4px 10px 4px 0;font-size:13px;}
.back-home{display:inline-block;margin:8px 0 4px;font-weight:700;}

@media (max-width:860px){
  .features-grid{grid-template-columns:repeat(2,1fr);}
  .steps{grid-template-columns:1fr;}
}
@media (max-width:720px){
  .navlinks{
    position:fixed;top:68px;left:0;right:0;background:var(--surface);
    flex-direction:column;align-items:stretch;gap:2px;padding:10px 20px 22px;
    border-bottom:1px solid var(--divider);transform:translateY(-8px);opacity:0;pointer-events:none;
    box-shadow:0 12px 24px rgba(0,0,0,0.06);
  }
  .navlinks.open{transform:translateY(0);opacity:1;pointer-events:auto;}
  .navtoggle{display:block;}
  .features-grid{grid-template-columns:1fr;}
  .phone{width:230px;height:470px;}
  .hero-actions .btn-ghost{margin-left:0;}
}