:root{
  --blue:#229ed9;
  --blue-deep:#168bc4;
  --ink:#14212b;
  --muted:#657581;
  --line:#e7eef2;
  --soft:#f5f9fb;
  --white:#fff;
  --max:1180px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:Inter,"SF Pro Display","PingFang SC","Microsoft YaHei",Arial,sans-serif;color:var(--ink);background:#fff;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font:inherit}
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);backdrop-filter:blur(18px);border-bottom:1px solid rgba(20,33,43,.06)}
.header-inner{max-width:var(--max);height:76px;margin:auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.brand{display:flex;align-items:center;gap:11px;font-size:22px;font-weight:800;letter-spacing:-.02em}
.brand img{width:40px;height:40px;border-radius:50%}
.site-nav{display:flex;align-items:center;gap:34px;color:#3d4c56;font-size:15px;font-weight:600}
.site-nav a:not(.nav-download){transition:.2s}.site-nav a:not(.nav-download):hover{color:var(--blue)}
.nav-download{background:var(--blue);color:#fff;padding:11px 18px;border-radius:999px;box-shadow:0 8px 22px rgba(34,158,217,.22)}
.nav-toggle{display:none;border:0;background:transparent;padding:8px}.nav-toggle span{display:block;width:24px;height:2px;background:#1d2a34;margin:5px 0}
.hero{position:relative;overflow:hidden;background:linear-gradient(180deg,#f9fdff 0%,#eef8fd 100%)}
.hero-inner{position:relative;z-index:2;max-width:var(--max);margin:auto;padding:82px 24px 92px;display:grid;grid-template-columns:.9fr 1.1fr;gap:56px;align-items:center}
.hero-glow{position:absolute;border-radius:50%;filter:blur(1px)}.hero-glow-a{width:460px;height:460px;background:rgba(34,158,217,.09);right:-110px;top:-140px}.hero-glow-b{width:260px;height:260px;background:rgba(80,193,238,.10);left:-80px;bottom:-110px}
.eyebrow,.section-kicker{margin:0 0 18px;color:var(--blue);font-size:12px;font-weight:800;letter-spacing:.18em}
.hero h1{margin:0;font-size:64px;line-height:1.03;letter-spacing:-.05em;font-weight:850}.hero h1 span{display:inline-block;margin-top:10px;font-size:48px;color:#2c3a43;font-weight:760}
.hero-text{max-width:570px;margin:26px 0 0;font-size:18px;line-height:1.82;color:var(--muted)}
.hero-actions{display:flex;gap:13px;margin-top:32px}.btn{display:inline-flex;align-items:center;justify-content:center;min-height:50px;padding:0 24px;border-radius:12px;font-size:15px;font-weight:750;transition:.2s}.btn-primary{color:#fff;background:var(--blue);box-shadow:0 13px 28px rgba(34,158,217,.22)}.btn-primary:hover{transform:translateY(-2px);background:var(--blue-deep)}.btn-ghost{background:#fff;border:1px solid #dbe8ee}.btn-ghost:hover{border-color:#aacfe0}
.hero-points{display:flex;gap:18px;flex-wrap:wrap;margin-top:26px;color:#77868f;font-size:13px}.hero-points span{position:relative;padding-left:14px}.hero-points span:before{content:"";position:absolute;width:5px;height:5px;background:#59bce7;border-radius:50%;left:0;top:6px}
.hero-visual{position:relative}.hero-device{padding:18px;background:#dff2fb;border-radius:28px;box-shadow:0 34px 65px rgba(29,73,94,.16);transform:rotate(1.1deg)}.hero-device img{width:100%;border-radius:17px}.hero-duck{position:absolute;width:124px;right:-34px;bottom:-48px;filter:drop-shadow(0 12px 18px rgba(26,52,66,.14))}
.feature-strip{background:#fff;border-bottom:1px solid var(--line)}.feature-strip-inner{max-width:var(--max);margin:auto;padding:30px 24px;display:grid;grid-template-columns:repeat(4,1fr)}.feature-strip-inner div{padding:2px 28px;border-right:1px solid var(--line)}.feature-strip-inner div:first-child{padding-left:0}.feature-strip-inner div:last-child{border-right:0}.feature-strip strong{display:block;font-size:16px}.feature-strip span{display:block;margin-top:7px;color:var(--muted);font-size:13px;line-height:1.55}
.story{padding:112px 0}.story:nth-of-type(even){background:#fff}.story-inner{max-width:var(--max);margin:auto;padding:0 24px;display:grid;grid-template-columns:1.05fr .95fr;gap:82px;align-items:center}.story-right .story-inner{grid-template-columns:.92fr 1.08fr}
.story-art{position:relative}.story-art .main-art{width:100%;border-radius:22px;filter:drop-shadow(0 24px 30px rgba(39,72,88,.12))}.art-desktop:before{content:"";position:absolute;inset:8% 4% -7% 8%;background:#eaf7fd;border-radius:32px;z-index:-1}.phone-pair{padding:0 42px}.phone-pair:before{content:"";position:absolute;width:78%;height:80%;right:0;top:10%;background:#eef8fd;border-radius:48px;z-index:-1}.phone-pair .main-art{max-height:660px;object-fit:contain;filter:none}.mini-duck{position:absolute;width:108px;filter:drop-shadow(0 12px 16px rgba(22,55,70,.12))}.duck-racer{left:-22px;bottom:-36px}.duck-tear{right:4px;bottom:6%}
.story h2,.section-head h2,.faq-title h2,.blue-band h2{margin:0;font-size:42px;line-height:1.18;letter-spacing:-.035em}.story-copy>p:not(.section-kicker){margin:23px 0 0;color:var(--muted);font-size:17px;line-height:1.82}.check-list{list-style:none;margin:28px 0;padding:0}.check-list li{position:relative;margin:14px 0;padding-left:28px;color:#40505b;line-height:1.65}.check-list li:before{content:"✓";position:absolute;left:0;top:0;color:var(--blue);font-weight:900}.text-link{display:inline-block;margin-top:5px;color:var(--blue);font-weight:750}
.number-steps{margin-top:30px}.number-steps div{display:grid;grid-template-columns:52px 1fr;gap:12px;padding:17px 0;border-bottom:1px solid var(--line)}.number-steps b{color:#8bcfea;font-size:22px}.number-steps span{color:var(--muted);line-height:1.62}.number-steps strong{display:block;color:var(--ink);font-size:15px;margin-bottom:3px}
.download-section{background:var(--soft);padding:110px 24px 120px}.section-head{max-width:740px;margin:0 auto 54px;text-align:center}.section-head>p:last-child{color:var(--muted);font-size:16px;line-height:1.7}.download-grid{max-width:var(--max);margin:auto;display:grid;grid-template-columns:1.2fr .9fr .9fr;gap:20px}.download-item{overflow:hidden;background:#fff;border-radius:26px;border:1px solid #e3edf2;box-shadow:0 18px 42px rgba(31,69,89,.07)}.download-image{height:280px;display:flex;align-items:center;justify-content:center;background:linear-gradient(160deg,#eff9fd,#dff3fb);overflow:hidden}.image-desktop img{width:92%;transform:translateY(4px)}.image-ios img{height:100%;width:auto;object-fit:contain}.image-android img{width:100%;height:100%;object-fit:cover;object-position:center}.download-copy{padding:28px}.platform-label{font-size:11px;font-weight:800;letter-spacing:.13em;color:#6c8c9c}.download-copy h3{margin:9px 0 10px;font-size:24px}.download-copy p{min-height:52px;margin:0;color:var(--muted);font-size:14px;line-height:1.7}.download-btn{display:inline-flex;margin-top:22px;padding:12px 17px;border-radius:10px;background:#eff8fc;color:#168bc4;font-size:14px;font-weight:800}.download-btn:hover{background:#e3f4fb}
.blue-band{position:relative;overflow:hidden;background:linear-gradient(125deg,#168bc4,#229ed9);color:#fff;padding:100px 24px}.blue-band-inner{position:relative;max-width:var(--max);margin:auto}.section-kicker.light{color:#c9efff}.band-copy{max-width:720px}.band-copy p:last-child{color:#daf2fc;font-size:17px;line-height:1.78}.band-features{margin-top:54px;display:grid;grid-template-columns:repeat(4,1fr);gap:34px}.band-features div{padding-top:20px;border-top:1px solid rgba(255,255,255,.32)}.band-features span{font-size:12px;opacity:.65}.band-features strong{display:block;margin:10px 0 7px;font-size:18px}.band-features p{margin:0;color:#d7eff9;line-height:1.65;font-size:14px}.band-duck{position:absolute;width:130px;right:0;top:-78px;filter:drop-shadow(0 12px 20px rgba(9,75,107,.28))}
.faq-section{padding:112px 24px}.faq-inner{max-width:var(--max);margin:auto;display:grid;grid-template-columns:.7fr 1.3fr;gap:90px}.faq-title p:last-child{color:var(--muted);line-height:1.7}.faq-list details{border-bottom:1px solid var(--line);padding:0}.faq-list summary{cursor:pointer;list-style:none;padding:22px 38px 22px 0;font-size:17px;font-weight:740;position:relative}.faq-list summary::-webkit-details-marker{display:none}.faq-list summary:after{content:"+";position:absolute;right:4px;top:18px;color:var(--blue);font-size:28px;font-weight:300}.faq-list details[open] summary:after{content:"–"}.faq-list details p{margin:-5px 0 22px;color:var(--muted);line-height:1.75;font-size:15px}
.final-cta{padding:0 24px 90px}.final-cta-inner{max-width:var(--max);margin:auto;background:#112530;color:#fff;border-radius:28px;padding:34px 42px;display:flex;align-items:center;gap:20px}.final-cta-inner img{width:66px;height:66px;border-radius:50%}.final-cta-inner div{flex:1}.final-cta-inner p{margin:0 0 3px;color:#98b8c7;font-size:13px}.final-cta-inner h2{margin:0;font-size:26px}.btn-light{background:#fff;color:#16242d}
.site-footer{background:#f5f8fa;padding:54px 24px;color:#6b7a84}.footer-inner{max-width:var(--max);margin:auto;text-align:center}.footer-brand{display:flex;align-items:center;justify-content:center;gap:9px;color:#21313b;font-weight:800}.footer-brand img{width:34px;height:34px;border-radius:50%}.footer-inner>p{max-width:760px;margin:18px auto;font-size:13px;line-height:1.75}.footer-links{display:flex;justify-content:center;gap:24px;color:#3d505c;font-size:13px;font-weight:700}.copyright{opacity:.75}
@media(max-width:980px){
  .hero-inner{grid-template-columns:1fr;padding-top:64px}.hero-copy{text-align:center}.hero-text{margin-left:auto;margin-right:auto}.hero-actions,.hero-points{justify-content:center}.hero h1{font-size:56px}.hero h1 span{font-size:42px}.hero-visual{max-width:760px;margin:auto}.feature-strip-inner{grid-template-columns:1fr 1fr;gap:20px}.feature-strip-inner div{border:0;padding:0}.story-inner,.story-right .story-inner{grid-template-columns:1fr;gap:54px}.story-right .story-copy{order:2}.story-right .story-art{order:1}.story-copy{text-align:center}.check-list{text-align:left;max-width:580px;margin-left:auto;margin-right:auto}.number-steps{text-align:left}.download-grid{grid-template-columns:1fr 1fr}.desktop-item{grid-column:1/-1}.band-features{grid-template-columns:1fr 1fr}.faq-inner{grid-template-columns:1fr;gap:34px}.faq-title{text-align:center}
}
@media(max-width:760px){
  .header-inner{height:66px;padding:0 18px}.brand{font-size:19px}.brand img{width:36px;height:36px}.nav-toggle{display:block;z-index:61}.site-nav{display:none;position:absolute;top:66px;left:0;right:0;background:#fff;padding:18px 22px 24px;flex-direction:column;align-items:stretch;gap:6px;border-bottom:1px solid var(--line);box-shadow:0 18px 28px rgba(17,37,48,.08)}.site-nav.open{display:flex}.site-nav a{padding:12px 6px}.nav-download{text-align:center;margin-top:5px}
  .hero-inner{padding:52px 18px 70px;gap:40px}.hero h1{font-size:43px}.hero h1 span{font-size:30px;line-height:1.25}.hero-text{font-size:16px}.hero-actions{flex-direction:column}.hero-actions .btn{width:100%}.hero-duck{width:88px;right:-8px;bottom:-38px}.hero-device{padding:10px;border-radius:19px}.feature-strip-inner{padding:28px 18px;grid-template-columns:1fr}.feature-strip-inner div{padding:0 0 18px;border-bottom:1px solid var(--line)}.feature-strip-inner div:last-child{border-bottom:0;padding-bottom:0}
  .story{padding:78px 0}.story-inner{padding:0 18px;gap:40px}.story h2,.section-head h2,.faq-title h2,.blue-band h2{font-size:34px}.story-copy>p:not(.section-kicker){font-size:16px}.phone-pair{padding:0 14px}.mini-duck{width:82px}.duck-racer{left:-4px}.download-section{padding:78px 18px 86px}.download-grid{grid-template-columns:1fr}.desktop-item{grid-column:auto}.download-image{height:245px}.download-copy{padding:24px}.blue-band{padding:78px 18px}.band-features{grid-template-columns:1fr}.band-duck{width:92px;top:-60px}.faq-section{padding:78px 18px}.faq-list summary{font-size:16px}.final-cta{padding:0 18px 70px}.final-cta-inner{padding:28px 24px;flex-wrap:wrap}.final-cta-inner img{width:56px;height:56px}.final-cta-inner h2{font-size:22px}.final-cta-inner .btn{width:100%;margin-top:8px}.site-footer{padding:44px 18px}.footer-links{flex-wrap:wrap}
}