/* =====================================================================
   FingerPixel 指尖像素 — 站点设计系统 (简洁科技风)
   单一轻量样式表，替代 307KB bootstrap-wondershare。
   仅系统字体，无外部依赖；性能优先。
   ===================================================================== */

/* ---------- Design tokens ---------- */
:root{
  /* neutrals */
  --bg:#ffffff;
  --bg-soft:#f5f8fc;
  --bg-tint:#eef5fb;
  --surface:#ffffff;
  --ink:#0f172a;          /* headings */
  --text:#334155;         /* body */
  --muted:#64748b;        /* secondary */
  --line:#e6ebf2;         /* borders */
  --line-soft:#eef2f7;

  /* brand — cyan → blue tech */
  --brand:#0e7490;        /* accessible link/solid (cyan-700) */
  --brand-bright:#06b6d4; /* cyan-500 accent/glow */
  --brand-2:#2563eb;      /* blue-600 */
  --brand-grad:linear-gradient(120deg,#0891b2 0%,#2563eb 100%);
  --brand-grad-soft:linear-gradient(120deg,#e0f4f9 0%,#e6efff 100%);

  /* radius */
  --r-sm:10px; --r:14px; --r-lg:20px; --r-xl:28px; --r-pill:999px;

  /* shadow */
  --shadow-sm:0 1px 2px rgba(15,23,42,.05), 0 2px 6px rgba(15,23,42,.05);
  --shadow:0 10px 30px -12px rgba(15,23,42,.16);
  --shadow-lg:0 24px 60px -20px rgba(11,110,140,.28);

  /* layout */
  --container:1200px;
  --nav-h:64px;

  /* type */
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","微软雅黑",Roboto,"Helvetica Neue",Arial,sans-serif;

  --ease:cubic-bezier(.2,.7,.2,1);
}

/* ---------- Reset ---------- */
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{
  margin:0;
  font-family:var(--font);
  font-size:16px;
  line-height:1.75;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;height:auto;display:block;border:0}
a{color:var(--brand);text-decoration:none;transition:color .2s var(--ease)}
a:hover{color:var(--brand-2)}
h1,h2,h3,h4{color:var(--ink);line-height:1.25;margin:0 0 .5em;font-weight:700;letter-spacing:-.01em}
p{margin:0 0 1em}
ul{margin:0;padding:0;list-style:none}
button{font-family:inherit}
:focus-visible{outline:2px solid var(--brand-bright);outline-offset:3px;border-radius:4px}

/* ---------- Layout helpers ---------- */
.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 20px}
.section{padding:72px 0}
.section-sm{padding:48px 0}
.section-alt{background:var(--bg-soft)}
.center{text-align:center}
.muted{color:var(--muted)}
.lead{font-size:clamp(1.05rem,1.2vw,1.2rem);color:var(--muted);line-height:1.9}
.eyebrow{
  display:inline-block;font-size:.82rem;font-weight:700;letter-spacing:.14em;
  text-transform:uppercase;color:var(--brand);
  padding:.3rem .7rem;border-radius:var(--r-pill);
  background:rgba(6,182,212,.10);margin-bottom:1rem;
}
.section-head{max-width:720px;margin:0 auto 48px}
.section-head.left{margin-left:0}
.section-head h2{font-size:clamp(1.7rem,3.4vw,2.5rem);margin-bottom:.4em}
.section-head p{font-size:clamp(1rem,1.2vw,1.12rem);color:var(--muted);margin:0}

/* ---------- Buttons ---------- */
.btn{
  --_bg:var(--surface);
  display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
  padding:.72rem 1.5rem;min-height:44px;
  font-size:1rem;font-weight:600;line-height:1;cursor:pointer;
  border-radius:var(--r-pill);border:1px solid transparent;
  transition:transform .2s var(--ease),box-shadow .2s var(--ease),background .2s var(--ease),color .2s var(--ease),border-color .2s var(--ease);
  white-space:nowrap;text-decoration:none;
}
.btn:hover{transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-primary{background:var(--brand-grad);color:#fff;box-shadow:0 10px 24px -10px rgba(37,99,235,.6)}
.btn-primary:hover{color:#fff;box-shadow:0 16px 32px -12px rgba(37,99,235,.7)}
.btn-ghost{background:var(--surface);color:var(--ink);border-color:var(--line)}
.btn-ghost:hover{color:var(--brand);border-color:var(--brand-bright);background:#fff}
.btn-lg{padding:.95rem 2rem;font-size:1.06rem;min-height:52px}
.btn .ico{width:1.1em;height:1.1em;transition:transform .2s var(--ease)}
.btn:hover .ico{transform:translateX(3px)}

/* CTA band */
.cta-band{position:relative;overflow:hidden;text-align:center;padding:clamp(44px,6vw,76px) 24px;border-radius:var(--r-xl);background:var(--brand-grad);color:#fff;box-shadow:var(--shadow-lg)}
.cta-band::before{content:"";position:absolute;inset:0;opacity:.35;background-image:linear-gradient(rgba(255,255,255,.14) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.14) 1px,transparent 1px);background-size:40px 40px;-webkit-mask-image:radial-gradient(70% 80% at 50% 0%,#000,transparent 75%);mask-image:radial-gradient(70% 80% at 50% 0%,#000,transparent 75%)}
.cta-band>*{position:relative}
.cta-band h2{color:#fff;font-size:clamp(1.6rem,3.2vw,2.3rem);margin-bottom:.4em}
.cta-band p{color:rgba(255,255,255,.92);max-width:560px;margin:0 auto 1.6rem;font-size:clamp(1rem,1.3vw,1.12rem)}

/* ---------- Navbar ---------- */
.fp-nav{
  position:sticky;top:0;z-index:50;
  background:rgba(255,255,255,.82);
  backdrop-filter:saturate(160%) blur(12px);
  -webkit-backdrop-filter:saturate(160%) blur(12px);
  border-bottom:1px solid transparent;
  transition:box-shadow .25s var(--ease),border-color .25s var(--ease),background .25s var(--ease);
}
.fp-nav.is-scrolled{border-bottom-color:var(--line);box-shadow:0 6px 24px -16px rgba(15,23,42,.3)}
.fp-nav__inner{height:var(--nav-h);display:flex;align-items:center;justify-content:space-between;gap:1rem}
.fp-brand{display:inline-flex;align-items:center;gap:.6rem;font-weight:800;font-size:1.12rem;color:var(--ink);letter-spacing:-.02em}
.fp-brand:hover{color:var(--ink)}
.fp-brand__mark{width:30px;height:30px;border-radius:9px;background:var(--brand-grad);display:inline-flex;align-items:center;justify-content:center;box-shadow:0 6px 14px -6px rgba(37,99,235,.7);flex:none}
.fp-brand__mark svg{width:18px;height:18px;color:#fff}
.fp-brand small{display:block;font-size:.62rem;font-weight:600;letter-spacing:.18em;color:var(--muted);text-transform:uppercase;margin-top:1px}
.fp-nav__left{display:inline-flex;align-items:center;gap:.85rem;min-width:0}
.fp-nav__links{display:flex;align-items:center;gap:.35rem}
.fp-nav__links a:not(.btn){
  color:var(--text);font-weight:500;font-size:.98rem;
  padding:.5rem .85rem;border-radius:var(--r-sm);
  transition:color .2s var(--ease),background .2s var(--ease);
}
.fp-nav__links a:not(.btn):hover{color:var(--brand);background:rgba(6,182,212,.08)}
.fp-nav__links a.active{color:var(--brand)}
.fp-nav__cta{margin-left:.5rem}
.fp-nav__appname{color:var(--muted);font-weight:500;font-size:.95rem;padding-left:.75rem;margin-left:.25rem;border-left:1px solid var(--line)}

/* mobile menu — checkbox hack, works without JS */
.fp-nav__toggle{display:none}
.fp-burger{display:none;width:44px;height:44px;border:0;background:transparent;cursor:pointer;align-items:center;justify-content:center;color:var(--ink)}
.fp-burger svg{width:26px;height:26px}
.fp-burger .x{display:none}

@media (max-width:900px){
  .fp-burger{display:inline-flex}
  .fp-nav__links{
    position:absolute;left:0;right:0;top:var(--nav-h);
    flex-direction:column;align-items:stretch;gap:0;
    background:#fff;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);
    padding:.5rem 20px 1rem;
    max-height:0;overflow:hidden;opacity:0;transform:translateY(-6px);
    pointer-events:none;transition:max-height .3s var(--ease),opacity .2s var(--ease),transform .25s var(--ease);
  }
  .fp-nav__links a:not(.btn){padding:.85rem .5rem;border-bottom:1px solid var(--line-soft)}
  .fp-nav__links .fp-nav__cta{margin:.9rem 0 .2rem;display:flex}
  .fp-nav__appname{display:none}
  .fp-nav__toggle:checked ~ .fp-nav__links{max-height:420px;opacity:1;transform:none;pointer-events:auto}
  .fp-nav__toggle:checked ~ .fp-burger .menu{display:none}
  .fp-nav__toggle:checked ~ .fp-burger .x{display:block}
}

/* ---------- Hero ---------- */
.hero{position:relative;padding:clamp(64px,10vw,120px) 0 clamp(56px,8vw,96px);overflow:hidden;isolation:isolate}
.hero::before{
  content:"";position:absolute;inset:0;z-index:-2;
  background:
    radial-gradient(60% 60% at 78% 8%,rgba(6,182,212,.16),transparent 60%),
    radial-gradient(55% 55% at 12% 92%,rgba(37,99,235,.14),transparent 60%),
    linear-gradient(180deg,var(--bg-tint),#fff 62%);
}
.hero::after{
  content:"";position:absolute;inset:0;z-index:-1;opacity:.5;
  background-image:linear-gradient(rgba(15,23,42,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(15,23,42,.04) 1px,transparent 1px);
  background-size:44px 44px;
  -webkit-mask-image:radial-gradient(70% 60% at 50% 30%,#000,transparent 75%);
  mask-image:radial-gradient(70% 60% at 50% 30%,#000,transparent 75%);
}
.hero__inner{max-width:840px;margin:0 auto;text-align:center}
.hero h1{font-size:clamp(2.1rem,5.4vw,3.6rem);letter-spacing:-.025em;margin-bottom:.35em}
.hero h1 .grad{background:var(--brand-grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:transparent}
.hero__sub{font-size:clamp(1.05rem,1.6vw,1.3rem);color:var(--muted);max-width:640px;margin:0 auto 2rem;line-height:1.9}
.hero__actions{display:flex;gap:.9rem;justify-content:center;flex-wrap:wrap}
.hero__stats{display:flex;gap:clamp(1.5rem,5vw,3.5rem);justify-content:center;flex-wrap:wrap;margin-top:3.5rem}
.hero__stat b{display:block;font-size:clamp(1.6rem,3vw,2.2rem);color:var(--ink);font-weight:800;letter-spacing:-.02em}
.hero__stat span{font-size:.92rem;color:var(--muted)}

/* ---------- Page header (sub-pages) ---------- */
.page-head{position:relative;overflow:hidden;text-align:center;padding:clamp(52px,7vw,88px) 0 clamp(32px,4vw,44px);background:linear-gradient(180deg,var(--bg-tint),#fff)}
.page-head::after{content:"";position:absolute;inset:0;z-index:0;opacity:.5;background-image:linear-gradient(rgba(15,23,42,.04) 1px,transparent 1px),linear-gradient(90deg,rgba(15,23,42,.04) 1px,transparent 1px);background-size:44px 44px;-webkit-mask-image:radial-gradient(60% 70% at 50% 0%,#000,transparent 75%);mask-image:radial-gradient(60% 70% at 50% 0%,#000,transparent 75%)}
.page-head .container{position:relative;z-index:1}
.page-head h1{font-size:clamp(1.9rem,4.2vw,2.9rem);letter-spacing:-.02em;margin-bottom:.3em}
.page-head p{max-width:620px;margin:0 auto;color:var(--muted);font-size:clamp(1rem,1.35vw,1.18rem)}

/* ---------- Grid & cards ---------- */
.grid{display:grid;gap:24px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}

.card{
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:32px 28px;height:100%;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.card.link{cursor:pointer}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.icon-chip{
  width:56px;height:56px;border-radius:16px;display:inline-flex;align-items:center;justify-content:center;
  background:var(--brand-grad-soft);color:var(--brand);margin-bottom:20px;
}
.icon-chip svg{width:28px;height:28px}
.card h3{font-size:1.3rem;margin-bottom:.5rem}
.card h3 small{font-weight:500;color:var(--muted);font-size:.86rem;letter-spacing:.02em}
.card p{color:var(--muted);margin:0;font-size:.98rem;line-height:1.85}

/* ---------- Product grid ---------- */
.product-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.product-card{
  display:flex;flex-direction:column;gap:14px;
  background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);
  padding:28px;height:100%;position:relative;
  transition:transform .25s var(--ease),box-shadow .25s var(--ease),border-color .25s var(--ease);
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-lg);border-color:transparent}
.product-card__head{display:flex;align-items:center;gap:16px}
.product-card__logo{width:60px;height:60px;border-radius:15px;object-fit:cover;box-shadow:var(--shadow-sm);background:#fff;flex:none}
.product-card__name{font-size:1.18rem;font-weight:700;color:var(--ink);margin:0}
.product-card__store{font-size:.82rem;color:var(--muted)}
.product-card__desc{color:var(--muted);font-size:.96rem;line-height:1.8;margin:0;flex:1}
.product-card__more{display:inline-flex;align-items:center;gap:.35rem;font-weight:600;color:var(--brand);font-size:.96rem}
.product-card__more .ico{width:1.05em;height:1.05em;transition:transform .2s var(--ease)}
.product-card:hover .product-card__more .ico{transform:translateX(4px)}
.product-card::after{content:"";position:absolute;inset:0;border-radius:inherit}

/* ---------- App detail ---------- */
.app-hero{position:relative;overflow:hidden;padding:clamp(48px,7vw,88px) 0;isolation:isolate}
.app-hero::before{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,var(--bg-tint),#fff)}
.app-hero__inner{display:flex;flex-direction:column;align-items:center;text-align:center;gap:1.1rem}
.app-hero__logo{width:104px;height:104px;border-radius:24px;box-shadow:var(--shadow);background:#fff;object-fit:cover}
.app-hero__name{font-size:clamp(1.8rem,4vw,2.6rem);margin:0}
.app-hero__tag{font-size:clamp(1.02rem,1.4vw,1.18rem);color:var(--muted);max-width:600px;margin:0 auto;line-height:1.85}
.app-hero__actions{display:flex;gap:.75rem;flex-wrap:wrap;justify-content:center;margin-top:.5rem}

.shots{display:flex;flex-direction:column;align-items:center;gap:clamp(28px,4vw,48px);padding:clamp(40px,6vw,72px) 0}
.shot{width:100%;max-width:960px;border-radius:var(--r-lg);overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line-soft)}
.shot img{width:100%;display:block}
.shot--plain{box-shadow:none;border:0;border-radius:0;background:transparent}

/* ---------- Info (about / contact) ---------- */
.info-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:20px}
.info-card{display:flex;gap:16px;align-items:flex-start;background:var(--surface);border:1px solid var(--line);border-radius:var(--r);padding:22px 24px}
.info-card__ico{width:46px;height:46px;border-radius:12px;flex:none;display:inline-flex;align-items:center;justify-content:center;background:var(--brand-grad-soft);color:var(--brand)}
.info-card__ico svg{width:22px;height:22px}
.info-card h4{margin:0 0 .2rem;font-size:1rem}
.info-card p{margin:0;color:var(--muted);font-size:.96rem;word-break:break-word}
.info-card a{color:var(--text)}
.info-card a:hover{color:var(--brand)}

/* prose block (about text) */
.prose{max-width:820px;margin:0 auto}
.prose p{font-size:1.06rem;line-height:2;color:var(--text)}

/* ---------- Footer ---------- */
.fp-footer{background:#0f172a;color:#cbd5e1;padding:56px 0 28px;margin-top:24px}
.fp-footer__top{display:flex;flex-wrap:wrap;gap:32px;justify-content:space-between;padding-bottom:32px;border-bottom:1px solid rgba(255,255,255,.08)}
.fp-footer__brand{max-width:320px}
.fp-footer__brand .fp-brand{color:#fff}
.fp-footer__brand small{color:#7c8aa5}
.fp-footer__brand p{margin:.9rem 0 0;color:#8595ad;font-size:.92rem;line-height:1.8}
.fp-footer__cols{display:flex;gap:clamp(32px,6vw,72px);flex-wrap:wrap}
.fp-footer__col h5{color:#fff;font-size:.95rem;margin:0 0 .9rem;font-weight:600}
.fp-footer__col a{display:block;color:#93a1b8;font-size:.92rem;padding:.3rem 0}
.fp-footer__col a:hover{color:#fff}
.fp-footer__bottom{padding-top:22px;display:flex;flex-wrap:wrap;gap:.4rem 1.1rem;align-items:center;justify-content:center;font-size:.82rem;color:#7c8aa5;text-align:center}
.fp-footer__bottom a{color:#7c8aa5;display:inline-flex;align-items:center;gap:.35rem}
.fp-footer__bottom a:hover{color:#cbd5e1}
.fp-footer__bottom img{display:inline-block;height:16px;width:auto}

/* ---------- Reveal on scroll ---------- */
[data-reveal]{opacity:1}
html.js [data-reveal]{opacity:0;transform:translateY(20px);transition:opacity .7s var(--ease),transform .7s var(--ease);transition-delay:var(--d,0s);will-change:opacity,transform}
html.js [data-reveal].in{opacity:1;transform:none}

/* ---------- Back to top ---------- */
.fp-top{
  position:fixed;right:20px;bottom:20px;z-index:40;
  width:46px;height:46px;border-radius:50%;border:1px solid var(--line);
  background:rgba(255,255,255,.9);backdrop-filter:blur(6px);color:var(--brand);
  display:inline-flex;align-items:center;justify-content:center;cursor:pointer;
  box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(10px);
  transition:opacity .3s var(--ease),transform .3s var(--ease),visibility .3s;
}
.fp-top.show{opacity:1;visibility:visible;transform:none}
.fp-top:hover{color:var(--brand-2);border-color:var(--brand-bright)}
.fp-top svg{width:22px;height:22px}

/* ---------- Responsive ---------- */
@media (max-width:900px){
  .grid-3,.grid-4,.product-grid{grid-template-columns:repeat(2,1fr)}
  .section{padding:56px 0}
}
@media (max-width:640px){
  .grid-2,.grid-3,.grid-4,.product-grid,.info-grid{grid-template-columns:1fr}
  .container{padding:0 18px}
  .section{padding:48px 0}
  .card{padding:26px 22px}
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms!important;transition-duration:.001ms!important}
  html.js [data-reveal]{opacity:1!important;transform:none!important}
  .btn:hover,.card:hover,.product-card:hover{transform:none}
}