/* Pie 对外官网：白底、近黑字、细字重；青苹果绿只给主按钮和一处强调（DESIGN.md §5 Ramp 参考） */
:root{
  --bg:#ffffff;--ink:#0c0a08;--ink2:#3a3a3c;--muted:#6e6e73;--line:#ececee;--soft:#f7f7f8;
  --accent:#a6ed1b;--accent-ink:#2f5d00;--ok-bg:#e6f2e9;
  --font:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI","Helvetica Neue","PingFang SC","Microsoft YaHei",Roboto,sans-serif;
  --r:14px;--shadow:0 1px 2px rgba(0,0,0,.04),0 12px 32px rgba(0,0,0,.08);
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth}
body{margin:0;background:var(--bg);color:var(--ink);font-family:var(--font);font-size:16px;line-height:1.55;-webkit-font-smoothing:antialiased}
a{color:inherit}
img{max-width:100%}
.wrap{max-width:1120px;margin:0 auto;padding-inline:20px}
.row{display:flex;align-items:center;justify-content:space-between;gap:16px}
.sr{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0)}

/* 中英切换：html[lang] 决定显示哪一种 */
html[lang="en"] .zh,html[lang="en"] .zh-only{display:none}
html[lang="zh"] .en{display:none}

.top{position:sticky;top:0;z-index:5;background:rgba(255,255,255,.86);-webkit-backdrop-filter:saturate(180%) blur(16px);backdrop-filter:saturate(180%) blur(16px);border-bottom:1px solid var(--line)}
.top .row{height:64px}
.brand{display:flex;align-items:center;gap:8px;text-decoration:none;font-weight:500;font-size:20px;letter-spacing:-.02em}
.brand-zh{color:var(--muted);font-weight:400}
.nav{display:flex;align-items:center;gap:20px;font-size:14px}
.nav a{text-decoration:none;color:var(--ink2)}
.nav a:hover{color:var(--ink)}
.lang{background:none;border:1px solid var(--line);border-radius:999px;padding:6px 12px;font:inherit;font-size:13px;color:var(--ink2);cursor:pointer}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;background:var(--accent);color:#0c0a08;border:0;border-radius:999px;padding:14px 22px;font:inherit;font-weight:500;text-decoration:none;cursor:pointer;white-space:nowrap;transition:transform 140ms cubic-bezier(.23,1,.32,1),filter .15s}
.btn:hover{filter:brightness(.96)}
.btn:active{transform:scale(.97)}
.btn.small{padding:8px 16px;font-size:14px}
.btn:focus-visible,.lang:focus-visible,a:focus-visible,summary:focus-visible,input:focus-visible{outline:2px solid var(--ink);outline-offset:2px}

.hero{display:grid;grid-template-columns:minmax(0,1.05fr) minmax(0,.95fr);gap:48px;align-items:center;padding-block:72px 48px}
.eyebrow{margin:0 0 16px;font-size:13px;color:var(--muted);letter-spacing:.02em}
h1{margin:0 0 20px;font-size:clamp(40px,6vw,64px);line-height:1.04;font-weight:400;letter-spacing:-.035em;text-wrap:balance}
h2{margin:0 0 28px;font-size:clamp(28px,4vw,40px);line-height:1.12;font-weight:400;letter-spacing:-.025em;text-wrap:balance}
h3{margin:0 0 8px;font-size:18px;font-weight:500;letter-spacing:-.01em}
.lede{margin:0 0 28px;font-size:18px;color:var(--ink2);max-width:36em}
.pill{display:flex;align-items:center;gap:6px;max-width:480px;background:#fafafa;border:1px solid var(--line);border-radius:999px;padding:6px}
.pill input[type=email]{flex:1;min-width:0;border:0;background:transparent;font:inherit;font-size:16px;padding:10px 14px;color:var(--ink)}
.pill input:focus{outline:none}
.fine{margin:12px 0 0;font-size:13px;color:var(--muted)}

.hero-art{position:relative;min-height:440px}
.phone{position:absolute;inset:20px 60px 20px 60px;background:var(--soft);border-radius:28px;border:1px solid var(--line);padding:28px}
.ph-top{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--muted)}
.ph-top .dot{width:8px;height:8px;border-radius:50%;background:var(--accent)}
.ph-big{margin-top:28px;font-size:44px;letter-spacing:-.03em;font-variant-numeric:tabular-nums}
.ph-sub{font-size:13px;color:var(--muted)}
.bars{display:flex;align-items:flex-end;gap:10px;height:120px;margin-top:40px}
.bars i{flex:1;height:var(--h);background:#dcdce0;border-radius:6px}
.bars i:nth-child(6){background:var(--accent)}
.float{position:absolute;display:flex;flex-direction:column;gap:2px;background:#fff;border-radius:var(--r);box-shadow:var(--shadow);padding:12px 16px;font-size:14px;max-width:280px}
.float b{font-weight:500}
.float span{color:var(--muted);font-size:13px}
.float.ok{background:var(--ok-bg)}
.f1{top:36px;right:0}
.f2{top:190px;left:0}
.f3{bottom:24px;right:12px}

.works{display:flex;align-items:center;gap:24px;flex-wrap:wrap;padding-block:24px 56px;color:var(--muted);font-size:14px}
.works ul{display:flex;flex-wrap:wrap;gap:12px 28px;list-style:none;margin:0;padding:0}
.works li{font-weight:500;color:#9a9aa0;letter-spacing:.01em}

.features{padding-block:56px;border-top:1px solid var(--line)}
.grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:40px 32px}
.grid article p{margin:0;color:var(--ink2)}

.gift{display:grid;grid-template-columns:minmax(0,1.1fr) minmax(0,.9fr);gap:48px;align-items:center;padding-block:72px;border-top:1px solid var(--line)}
.gift-copy>p{color:var(--ink2);margin:0 0 20px;max-width:36em}
.ticks{list-style:none;margin:0;padding:0;display:flex;flex-direction:column;gap:10px}
.ticks li{position:relative;padding-left:28px}
.ticks li::before{content:"";position:absolute;left:0;top:.35em;width:16px;height:16px;border-radius:50%;background:var(--accent)}
.card-art{display:flex;justify-content:center}
.gc{position:relative;width:min(340px,100%);aspect-ratio:1.586;border-radius:18px;background:#0c0a08;color:#fff;padding:22px;display:flex;flex-direction:column;justify-content:space-between;box-shadow:var(--shadow)}
.gc-brand{font-size:15px;letter-spacing:.02em}
.gc-code{font-family:ui-monospace,SFMono-Regular,Menlo,Consolas,monospace;font-size:15px;color:#cfcfd4;letter-spacing:.06em}
.gc-bal{font-size:32px;letter-spacing:-.02em;color:var(--accent);font-variant-numeric:tabular-nums}

.faq{padding-block:56px;border-top:1px solid var(--line);max-width:820px}
.faq details{border-bottom:1px solid var(--line);padding-block:18px}
.faq summary{cursor:pointer;font-size:18px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--muted);font-size:22px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq details p{margin:12px 0 0;color:var(--ink2)}

.cta{text-align:center;padding-block:80px;border-top:1px solid var(--line)}
.cta h2{margin-bottom:24px}

.foot{border-top:1px solid var(--line);background:var(--soft);padding-block:40px 24px;font-size:14px;color:var(--muted)}
.foot-row{display:flex;justify-content:space-between;gap:24px;flex-wrap:wrap}
.foot p{margin:10px 0 0}
.foot nav{display:flex;gap:20px;flex-wrap:wrap}
.foot a{text-decoration:none}
.foot a:hover{color:var(--ink)}
.small-brand{font-size:16px;color:var(--ink)}
.copy{margin-top:24px;font-size:12px}

/* 法律页 */
.legal{max-width:760px;padding-block:56px 80px}
.legal h1{font-size:clamp(32px,5vw,44px);margin-bottom:8px}
.legal .upd{color:var(--muted);font-size:14px;margin:0 0 32px}
.legal h2{font-size:22px;margin:36px 0 10px;font-weight:500;letter-spacing:-.01em}
.legal p,.legal li{color:var(--ink2)}
.legal ul{padding-left:20px}
.legal table{border-collapse:collapse;width:100%;font-size:14px;margin:8px 0}
.legal th,.legal td{border-bottom:1px solid var(--line);padding:8px 6px;text-align:left;vertical-align:top}
.legal th{font-weight:500;color:var(--ink)}
.tbl{overflow-x:auto}

@media (max-width:900px){
  .hero,.gift{grid-template-columns:1fr;gap:32px}
  .hero{padding-block:48px 24px}
  .hero-art{min-height:400px}
  .grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .nav a:not(.btn){display:none}
}
@media (max-width:560px){
  .grid{grid-template-columns:1fr;gap:28px}
  .phone{inset:20px 16px}
  .f1{right:-4px;top:4px}
  .f2{left:-4px;top:170px}
  .f3{right:-4px;bottom:0}
  .pill{flex-direction:column;align-items:stretch;border-radius:20px}
  .pill .btn{width:100%}
}
@media (prefers-reduced-motion:reduce){html{scroll-behavior:auto}.btn{transition:none}}