:root{
  --bg:#161616;
  --bg-alt:#1A1A1A;
  --card:#232323;
  --card-2:#2A2A2A;
  --mint:#5AB8C9;
  --mint-light:#7FD3E0;
  --mint-deep:#3D9AA9;
  --text:#FFFFFF;
  --text-2:#A8A8A8;
  --border:rgba(255,255,255,.08);
  --radius:20px;
  --maxw:1120px;
  --shadow:0 20px 50px rgba(0,0,0,.45);
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  background:var(--bg);
  color:var(--text);
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.center{text-align:center}
.accent{color:var(--mint)}
.skip-link{position:absolute;left:-9999px;top:0;background:var(--mint);color:#08262b;padding:10px 16px;border-radius:0 0 10px 0;z-index:99}
.skip-link:focus{left:0}

/* ---------- header ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  background:rgba(22,22,22,.78);
  backdrop-filter:blur(14px);
  -webkit-backdrop-filter:blur(14px);
  border-bottom:1px solid var(--border);
}
.nav-row{display:flex;align-items:center;justify-content:space-between;height:68px;gap:16px}
.brand{display:flex;align-items:center;gap:10px;color:var(--mint)}
.brand-mark{width:30px;height:30px}
.brand-name{font-size:1.15rem;font-weight:600;color:var(--text);letter-spacing:.02em}
.brand-name b{color:var(--mint);font-weight:700}
.nav-links{display:flex;align-items:center;gap:28px}
.nav-links a{color:var(--text-2);font-size:.95rem;transition:color .2s}
.nav-links a:hover{color:var(--text)}
.nav-cta{color:#08262b !important}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;flex-direction:column;gap:5px;padding:8px}
.nav-toggle span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:transform .25s,opacity .25s}
.nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
.nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

/* ---------- buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:10px;border-radius:999px;font-weight:600;cursor:pointer;border:0;transition:transform .15s,box-shadow .2s,background .2s}
.btn svg{width:20px;height:20px}
.btn-primary{background:linear-gradient(135deg,var(--mint-light),var(--mint) 55%,var(--mint-deep));color:#08262b;box-shadow:0 8px 24px rgba(90,184,201,.35)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(90,184,201,.45)}
.btn-ghost{background:transparent;color:var(--text);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--mint);color:var(--mint)}
.btn-sm{padding:9px 18px;font-size:.9rem}
.btn-lg{padding:15px 30px;font-size:1.05rem}
.btn-block{width:100%}

/* ---------- hero ---------- */
.hero{padding:88px 0 64px;background:
  radial-gradient(900px 480px at 78% -10%,rgba(90,184,201,.16),transparent 60%),
  var(--bg);}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:48px;align-items:center}
.eyebrow{color:var(--mint);font-size:.85rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;margin-bottom:14px}
.hero h1{font-size:clamp(2.3rem,5.4vw,3.7rem);line-height:1.12;font-weight:800;letter-spacing:-.01em}
.lede{color:var(--text-2);font-size:1.1rem;margin:20px 0 30px;max-width:34em}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.hero-meta{display:flex;gap:26px;list-style:none;margin-top:30px;color:var(--text-2);font-size:.92rem;flex-wrap:wrap}
.hero-meta b{color:var(--text);font-weight:700}

/* orb mascot */
.hero-visual{display:flex;justify-content:center}
.orb-stage{position:relative;width:min(360px,80vw);aspect-ratio:1;display:flex;align-items:center;justify-content:center}
.orb{
  position:relative;width:64%;aspect-ratio:1;border-radius:50%;
  background:radial-gradient(circle at 32% 26%,var(--mint-light),var(--mint) 52%,var(--mint-deep) 100%);
  box-shadow:inset 0 -18px 40px rgba(0,0,0,.28),0 24px 60px rgba(90,184,201,.28);
  animation:float 5s ease-in-out infinite;
}
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-14px)}}
.hair{position:absolute;top:-16%;width:5.5%;height:30%;border-radius:999px;background:linear-gradient(to top,var(--mint-deep),var(--mint-light));transform-origin:bottom center}
.hair-l{left:34%;transform:rotate(-16deg)}
.hair-r{left:58%;transform:rotate(14deg)}
.eye{position:absolute;top:36%;width:24%;aspect-ratio:1;border-radius:50%;background:#101416;animation:blink 5.2s infinite}
.eye-l{left:20%}.eye-r{left:56%}
.eye i{position:absolute;border-radius:50%;background:#fff}
.eye i:first-child{width:34%;aspect-ratio:1;top:16%;left:18%}
.eye i.h2{width:16%;aspect-ratio:1;bottom:20%;right:20%;opacity:.85}
@keyframes blink{0%,92%,100%{transform:scaleY(1)}95%{transform:scaleY(.12)}}
.orb-shadow{position:absolute;bottom:4%;width:46%;height:5%;border-radius:50%;background:radial-gradient(closest-side,rgba(0,0,0,.5),transparent);filter:blur(2px)}
.float-card{position:absolute;background:var(--card);border:1px solid var(--border);border-radius:14px;padding:10px 16px;font-size:.88rem;color:var(--text-2);box-shadow:var(--shadow);white-space:nowrap}
.fc-1{left:-4%;top:22%;display:flex;align-items:center;gap:8px;animation:float 6s ease-in-out infinite}
.fc-1 .dot{width:8px;height:8px;border-radius:50%;background:var(--mint);box-shadow:0 0 0 0 rgba(90,184,201,.6);animation:pulse 1.6s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(90,184,201,0)}100%{box-shadow:0 0 0 0 rgba(90,184,201,0)}}
.fc-2{right:-6%;bottom:20%;color:var(--mint-light);font-style:italic;animation:float 7s ease-in-out infinite reverse}

/* ---------- trust ---------- */
.trust{border-top:1px solid var(--border);border-bottom:1px solid var(--border);background:var(--bg-alt)}
.trust-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:30px 24px}
.trust-item{display:flex;gap:14px;align-items:flex-start}
.t-ico{font-size:1.5rem;line-height:1}
.trust-item b{display:block;font-size:1rem}
.trust-item p{color:var(--text-2);font-size:.86rem;margin-top:2px}

/* ---------- sections ---------- */
.section{padding:92px 0}
.section-alt{background:var(--bg-alt)}
.section h2{font-size:clamp(1.7rem,3.6vw,2.5rem);font-weight:800;letter-spacing:-.01em}
.section-lede{color:var(--text-2);margin-top:14px;font-size:1.05rem}
.section .eyebrow.center{margin-bottom:10px}

/* features */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:52px}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
.feature{padding:30px 26px;transition:transform .2s,border-color .2s}
.feature:hover{transform:translateY(-4px);border-color:rgba(90,184,201,.5)}
.f-ico{display:inline-flex;width:48px;height:48px;align-items:center;justify-content:center;font-size:1.5rem;background:rgba(90,184,201,.12);border:1px solid rgba(90,184,201,.3);border-radius:14px;margin-bottom:18px}
.feature h3{font-size:1.15rem;margin-bottom:8px}
.feature p{color:var(--text-2);font-size:.95rem}

/* steps */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;margin-top:56px;list-style:none;counter-reset:step}
.step{position:relative;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px 26px 30px}
.step-no{position:absolute;top:-22px;left:26px;width:44px;height:44px;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;font-size:1.2rem;color:#08262b;background:linear-gradient(135deg,var(--mint-light),var(--mint-deep));box-shadow:0 8px 20px rgba(90,184,201,.35)}
.step h3{margin:8px 0 8px}
.step p{color:var(--text-2);font-size:.95rem}

/* phones */
.phone-row{display:grid;grid-template-columns:repeat(3,1fr);gap:30px;margin-top:56px;justify-items:center}
.phone{width:min(270px,80vw);background:#000;border:1px solid var(--border);border-radius:34px;padding:10px;box-shadow:var(--shadow)}
.phone img{border-radius:26px;aspect-ratio:9/19;object-fit:cover;object-position:top}
.phone figcaption{text-align:center;color:var(--text-2);font-size:.88rem;padding:12px 4px 6px}

/* download */
.download-wrap{display:flex;justify-content:center}
.download-card{max-width:640px;width:100%;padding:44px 40px;text-align:left}
.download-card h2{margin-bottom:6px}
.download-card .btn-block{margin:26px 0 26px}
.dl-meta{display:grid;grid-template-columns:repeat(2,1fr);gap:14px 24px;margin-bottom:20px}
.dl-meta div{background:var(--card-2);border:1px solid var(--border);border-radius:12px;padding:10px 14px}
.dl-meta dt{color:var(--text-2);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase}
.dl-meta dd{font-weight:600;font-size:.95rem;margin-top:2px}
.dl-hash{background:var(--card-2);border:1px dashed var(--border);border-radius:12px;padding:12px 14px;margin-bottom:18px}
.dl-hash span{display:block;color:var(--text-2);font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;margin-bottom:4px}
.dl-hash code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:.78rem;color:var(--mint-light);word-break:break-all}
.dl-notes{border:1px solid var(--border);border-radius:12px;background:var(--card-2);margin-bottom:16px}
.dl-notes summary{cursor:pointer;padding:12px 16px;font-weight:600;font-size:.95rem}
.dl-notes ul{padding:0 16px 14px 34px;color:var(--text-2);font-size:.92rem}
.dl-notes li{margin:4px 0}
.dl-tip{color:var(--text-2);font-size:.85rem}
.dl-hint{color:var(--mint-light);font-size:.9rem;margin:-8px 0 18px;min-height:1.2em}
.dl-platforms{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px}
.plat{display:flex;flex-direction:column;align-items:center;gap:4px;text-align:center;background:var(--card-2);
  border:1px solid var(--border);border-radius:14px;padding:14px 8px;transition:border-color .2s,transform .15s}
.plat:hover{border-color:var(--mint);transform:translateY(-2px)}
.plat.soon{opacity:.55;pointer-events:none}
.plat-ico{font-size:1.5rem;line-height:1}
.plat b{font-size:.92rem}
.plat i{font-style:normal;color:var(--text-2);font-size:.76rem}
.dl-qr{display:flex;align-items:center;gap:16px;background:var(--card-2);border:1px solid var(--border);border-radius:16px;padding:14px 16px;margin-bottom:18px}
.dl-qr img{background:#fff;border-radius:10px;padding:6px;flex:0 0 auto}
.dl-qr b{font-size:.98rem}
.dl-qr p{color:var(--text-2);font-size:.85rem;margin-top:4px}
@media (max-width:520px){.dl-platforms{grid-template-columns:1fr}.dl-qr{flex-direction:column;text-align:center}}

/* faq */
.faq-wrap{max-width:760px;margin:0 auto}
.faq-list{margin-top:44px;display:flex;flex-direction:column;gap:14px}
.faq{border-radius:16px;overflow:hidden}
.faq summary{cursor:pointer;padding:18px 22px;font-weight:600;list-style:none;display:flex;justify-content:space-between;align-items:center}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--mint);font-size:1.4rem;line-height:1;transition:transform .2s}
.faq[open] summary::after{transform:rotate(45deg)}
.faq p{padding:0 22px 20px;color:var(--text-2);font-size:.95rem}

/* footer */
.site-footer{border-top:1px solid var(--border);background:var(--bg-alt);padding:56px 0 28px}
.footer-grid{display:flex;justify-content:space-between;gap:32px;flex-wrap:wrap}
.footer-brand p{color:var(--text-2);margin-top:12px;font-size:.92rem}
.footer-links{display:flex;gap:26px;flex-wrap:wrap}
.footer-links a{color:var(--text-2);font-size:.92rem}
.footer-links a:hover{color:var(--mint)}
.footer-base{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:40px;padding-top:22px;border-top:1px solid var(--border);color:var(--text-2);font-size:.85rem}

/* ---------- responsive ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:36px}
  .hero-visual{order:-1}
  .orb-stage{width:min(280px,70vw)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .steps{grid-template-columns:1fr;gap:34px}
  .phone-row{grid-template-columns:1fr;gap:36px}
  .trust-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:720px){
  .nav-toggle{display:flex}
  .nav-links{
    position:absolute;top:68px;left:0;right:0;
    flex-direction:column;align-items:stretch;gap:0;
    background:rgba(22,22,22,.98);border-bottom:1px solid var(--border);
    max-height:0;overflow:hidden;transition:max-height .3s ease;
  }
  .nav-links.open{max-height:340px}
  .nav-links a{padding:16px 24px;border-top:1px solid var(--border)}
  .nav-cta{margin:12px 24px 18px;justify-content:center}
  .feature-grid{grid-template-columns:1fr}
  .trust-grid{grid-template-columns:1fr}
  .dl-meta{grid-template-columns:1fr}
  .download-card{padding:34px 24px}
  .section{padding:68px 0}
  .hero{padding:56px 0 44px}
}