:root{--bg:#f5f7fb;--surface:rgba(255,255,255,.82);--text:#111827;--muted:#667085;--line:rgba(17,24,39,.08);--accent:#2563eb;--accent2:#7c3aed;--max:1180px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"SF Pro Display","Segoe UI",sans-serif;color:var(--text);background:radial-gradient(circle at 12% 8%,rgba(37,99,235,.12),transparent 30%),radial-gradient(circle at 88% 12%,rgba(124,58,237,.1),transparent 30%),var(--bg);line-height:1.6}a{color:inherit;text-decoration:none}.shell{width:min(calc(100% - 40px),var(--max));margin:auto}.nav{position:sticky;top:0;z-index:20;backdrop-filter:blur(18px);background:rgba(245,247,251,.72);border-bottom:1px solid rgba(255,255,255,.5)}.nav-inner{height:72px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;font-weight:760}.brand-mark{width:38px;height:38px;border-radius:12px;display:grid;place-items:center;color:#fff;font-size:20px;background:linear-gradient(145deg,var(--accent),var(--accent2));box-shadow:0 8px 24px rgba(37,99,235,.24)}.nav-links{display:flex;gap:26px;color:#344054;font-size:15px}.lang-toggle{border:1px solid var(--line);background:rgba(255,255,255,.75);border-radius:999px;padding:8px 13px;cursor:pointer}.hero{padding:92px 0 70px;overflow:hidden}.hero-grid{display:grid;grid-template-columns:1.06fr .94fr;align-items:center;gap:72px}.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:8px 12px;border-radius:999px;background:rgba(255,255,255,.72);border:1px solid var(--line);color:#475467;font-size:14px;font-weight:650}.dot{width:8px;height:8px;border-radius:50%;background:#22c55e;box-shadow:0 0 0 5px rgba(34,197,94,.12)}.hero h1{margin:24px 0 20px;font-size:clamp(48px,6vw,78px);line-height:.98;letter-spacing:-.055em}.gradient{background:linear-gradient(90deg,var(--accent),var(--accent2));-webkit-background-clip:text;background-clip:text;color:transparent}.lead{font-size:21px;line-height:1.55;color:var(--muted);max-width:700px}.cta-row{display:flex;flex-wrap:wrap;gap:14px;margin-top:32px}.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:14px;padding:13px 18px;font-weight:700;border:1px solid var(--line)}.btn.primary{background:#111827;color:#fff;box-shadow:0 14px 28px rgba(17,24,39,.16)}.btn.secondary{background:rgba(255,255,255,.78)}.trust-row{display:flex;flex-wrap:wrap;gap:18px;margin-top:28px;color:#475467;font-size:14px}.trust-item{display:flex;align-items:center;gap:8px}.check{width:20px;height:20px;border-radius:50%;display:grid;place-items:center;background:#ecfdf3;color:#15803d;font-size:12px;font-weight:800}.phone{margin:auto;width:min(360px,88vw);height:720px;padding:12px;border-radius:54px;background:#0f172a;box-shadow:0 40px 90px rgba(15,23,42,.28);transform:rotate(2deg)}.phone-screen{height:100%;border-radius:44px;overflow:hidden;background:linear-gradient(180deg,#f8fbff,#eef4ff);position:relative}.notch{position:absolute;top:10px;left:50%;transform:translateX(-50%);width:128px;height:30px;border-radius:20px;background:#0f172a}.status{padding:24px 22px 14px;display:flex;justify-content:space-between;font-size:12px;font-weight:700}.app-head{padding:18px 24px 8px}.app-head small{color:#667085}.app-head h3{margin:5px 0 0;font-size:29px}.card{margin:16px 18px;padding:18px;border-radius:24px;background:rgba(255,255,255,.92);box-shadow:0 12px 36px rgba(50,70,120,.1)}.nas-top,.metric,.album-row{display:flex;justify-content:space-between;align-items:center}.album-meta{display:flex;align-items:center;gap:11px}.nas-icon{width:46px;height:46px;border-radius:14px;display:grid;place-items:center;background:#eef4ff;font-size:23px}.online{font-size:12px;color:#15803d;background:#ecfdf3;padding:6px 9px;border-radius:999px;font-weight:700}.metric{margin-top:17px}.metric strong{font-size:31px}.metric span{color:#667085;font-size:13px}.bar{height:10px;background:#e7ecf6;border-radius:999px;overflow:hidden;margin-top:14px}.bar span{display:block;height:100%;width:72%;background:linear-gradient(90deg,var(--accent),var(--accent2))}.progress{display:flex;gap:12px;align-items:center}.spin{width:40px;height:40px;border-radius:50%;border:5px solid #dbe7ff;border-top-color:var(--accent)}.album-list{display:grid;gap:12px;margin-top:14px}.thumb{width:42px;height:42px;border-radius:12px;background:linear-gradient(135deg,#fca5a5,#f59e0b)}.thumb.two{background:linear-gradient(135deg,#93c5fd,#6366f1)}.thumb.three{background:linear-gradient(135deg,#86efac,#14b8a6)}.toggle{width:42px;height:24px;border-radius:999px;background:#2563eb;padding:3px}.toggle:after{content:"";display:block;width:18px;height:18px;border-radius:50%;background:#fff;margin-left:18px}.section{padding:86px 0}.section-head{max-width:760px;margin-bottom:40px}.kicker{font-size:14px;font-weight:760;letter-spacing:.12em;text-transform:uppercase;color:var(--accent)}.section h2{font-size:clamp(36px,4vw,54px);letter-spacing:-.045em;line-height:1.05;margin:10px 0 15px}.section-head p{font-size:19px;color:var(--muted)}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.feature{background:rgba(255,255,255,.78);border:1px solid rgba(255,255,255,.9);box-shadow:0 18px 50px rgba(15,23,42,.07);border-radius:24px;padding:26px;min-height:250px}.feature-icon{width:52px;height:52px;border-radius:16px;display:grid;place-items:center;background:#f0f4ff;font-size:25px}.feature h3{font-size:21px;line-height:1.25;margin:20px 0 10px}.feature p{color:var(--muted);margin:0}.flow{display:grid;grid-template-columns:repeat(7,auto);align-items:center;justify-content:space-between;gap:14px;background:rgba(255,255,255,.72);border:1px solid var(--line);border-radius:28px;padding:28px;box-shadow:0 24px 70px rgba(15,23,42,.1)}.flow-step{display:grid;justify-items:center;text-align:center;gap:12px;min-width:120px}.flow-icon{width:74px;height:74px;border-radius:23px;display:grid;place-items:center;font-size:32px;background:#f2f5ff}.flow-arrow{color:#98a2b3;font-size:28px}.privacy{display:grid;grid-template-columns:1fr 1fr;gap:26px}.privacy-card{background:#111827;color:#fff;border-radius:32px;padding:36px}.privacy-card p{color:#cbd5e1}.privacy-list{display:grid;gap:16px;background:rgba(255,255,255,.8);border-radius:32px;padding:32px;border:1px solid var(--line)}.item{display:flex;gap:14px;align-items:flex-start}.item strong{display:block}.item span:last-child{color:var(--muted)}.cta-panel{padding:44px;border-radius:32px;background:linear-gradient(135deg,#eef4ff,#f5efff);display:flex;justify-content:space-between;align-items:center;gap:30px}.footer{padding:36px 0 50px;color:#667085}.footer-inner{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap;border-top:1px solid var(--line);padding-top:26px}.footer-links{display:flex;gap:18px}.page-hero{padding:82px 0 44px}.page-hero h1{font-size:56px;margin:0}.page-hero p{font-size:19px;color:var(--muted)}.content-card{background:rgba(255,255,255,.82);border:1px solid var(--line);border-radius:28px;padding:36px;margin-bottom:70px}.content-card p,.content-card li{color:#475467}[data-lang]{display:none}html[data-locale=en] [data-lang=en]{display:revert}html[data-locale=zh] [data-lang=zh]{display:revert}@media(max-width:980px){.hero-grid,.privacy{grid-template-columns:1fr}.phone{transform:none}.grid-3{grid-template-columns:repeat(2,1fr)}.flow{grid-template-columns:1fr}.flow-arrow{transform:rotate(90deg)}}@media(max-width:680px){.shell{width:min(calc(100% - 24px),var(--max))}.nav-links{display:none}.hero h1{font-size:48px}.phone{width:320px;height:650px}.grid-3{grid-template-columns:1fr}.cta-panel{flex-direction:column;align-items:flex-start}.page-hero h1{font-size:44px}}

.legal-meta{margin-top:18px;color:var(--muted);font-size:14px}.legal-layout{display:grid;grid-template-columns:250px minmax(0,1fr);gap:28px;align-items:start}.legal-toc{position:sticky;top:96px;background:rgba(255,255,255,.76);border:1px solid var(--line);border-radius:22px;padding:22px;box-shadow:0 12px 36px rgba(15,23,42,.05)}.legal-toc strong{display:block;margin-bottom:12px}.legal-toc ol{margin:0;padding-left:20px}.legal-toc li{margin:8px 0;color:#667085;font-size:14px}.legal-toc a:hover{color:var(--accent)}.legal-content{margin-bottom:70px}.legal-content section{scroll-margin-top:100px}.legal-content h2{padding-top:4px}.legal-content h3{margin:22px 0 8px;font-size:19px}.legal-content p,.legal-content li{line-height:1.78}.flow-steps-4 .flow-step{max-width:190px}.flow-steps-4 strong{line-height:1.35}@media(max-width:980px){.legal-layout{grid-template-columns:1fr}.legal-toc{position:static}.flow-steps-4 .flow-step{max-width:none}}

/* Language visibility: keep the two localized versions completely isolated. */
[data-lang]{display:none!important}
html[data-locale="en"] [data-lang="en"]{display:revert!important}
html[data-locale="zh"] [data-lang="zh"]{display:revert!important}

/* Privacy summary list */
.privacy{grid-template-columns:minmax(0,.9fr) minmax(540px,1.1fr)}
.privacy-list{gap:20px;padding:34px 32px}
.privacy-list .item{display:grid;grid-template-columns:20px minmax(0,1fr);gap:14px;align-items:start}
.privacy-list .check{margin-top:2px;flex:none}
.privacy-list .item-copy{min-width:0}
.privacy-list .item-copy>div{min-width:0}
.privacy-list .item-copy strong{display:block;margin:0 0 4px;color:#667085;font-size:16px;line-height:1.35;white-space:nowrap}
.privacy-list .item-copy p{display:block;margin:0;color:#667085;font-size:16px;line-height:1.55;text-wrap:pretty}

@media(max-width:1100px){
  .privacy{grid-template-columns:1fr}
  .privacy-list .item-copy strong{white-space:normal}
}
@media(max-width:680px){
  .privacy-list{padding:26px 22px}
}

/* v1.2 workflow refinement */
.flow{
  padding:22px 26px;
  min-height:164px;
  gap:10px;
}
.flow-step{
  gap:10px;
  min-width:150px;
  align-content:center;
}
.flow-step strong{
  display:block;
  text-align:center;
  line-height:1.3;
  min-height:2.6em;
}
.flow-icon{
  width:66px;
  height:66px;
  border-radius:20px;
  padding:11px;
  background:linear-gradient(180deg,#f7f9ff,#eef3ff);
  box-shadow:inset 0 0 0 1px rgba(37,99,235,.05);
}
.flow-icon svg{
  width:100%;
  height:100%;
  display:block;
}
.flow-arrow{
  color:#c4ccda;
  width:30px;
  height:30px;
  display:grid;
  place-items:center;
  font-size:0;
}
.flow-arrow svg{
  width:24px;
  height:24px;
  display:block;
}
@media(max-width:980px){
  .flow{padding:22px;min-height:0;gap:8px}
  .flow-step{min-width:0}
  .flow-step strong{min-height:0}
  .flow-arrow{transform:rotate(90deg)}
}