/* === WPS Office - 极简商务风 === */
:root {
  --pri: #1a6cf0;
  --pri-d: #1351b8;
  --pri-l: #e8f0fe;
  --acc: #f59e0b;
  --acc-l: #fef3c7;
  --bg: #f8f9fc;
  --bg2: #eef1f6;
  --card: #ffffff;
  --bdr: #e2e6ee;
  --txt: #0f172a;
  --txt2: #475569;
  --txt3: #94a3b8;
  --r: 20px;
  --rs: 12px;
  --sh: 0 1px 3px rgba(0,0,0,.04),0 6px 24px rgba(0,0,0,.05);
  --sh-lg: 0 4px 6px rgba(0,0,0,.02),0 16px 48px rgba(0,0,0,.08);
  --fx: cubic-bezier(.34,1.56,.64,1);
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--txt);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ---- Nav ---- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:999;
  background:rgba(255,255,255,.85);backdrop-filter:blur(20px);-webkit-backdrop-filter:blur(20px);
  border-bottom:1px solid var(--bdr);
}
.nav-in{
  max-width:1280px;margin:0 auto;padding:0 36px;height:64px;
  display:flex;align-items:center;justify-content:space-between;
}
.nav-logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:18px;letter-spacing:-.4px}
.nav-logo .lg{width:34px;height:34px;border-radius:10px;background:var(--pri);display:grid;place-items:center;color:#fff;font-size:14px;font-weight:900}
.nav-logo span{color:var(--pri)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{padding:7px 14px;border-radius:8px;font-size:13px;font-weight:500;color:var(--txt2);transition:all .25s}
.nav-links a:hover{color:var(--txt);background:var(--bg2)}
.nav-links a.btn-nav{background:var(--pri);color:#fff;font-weight:600;padding:9px 20px;border-radius:24px;box-shadow:0 4px 16px rgba(26,108,240,.3)}
.nav-links a.btn-nav:hover{background:var(--pri-d);transform:translateY(-1px);box-shadow:0 8px 24px rgba(26,108,240,.4)}
.nav-tgl{display:none;background:none;border:none;color:var(--txt);font-size:24px;cursor:pointer}

/* ---- Hero ---- */
.hero{
  padding:160px 0 100px;position:relative;overflow:hidden;
  background:linear-gradient(180deg,#ebf2fe 0%,var(--bg) 100%);
}
.hero::before{
  content:'';position:absolute;top:-200px;right:-160px;width:600px;height:600px;
  border-radius:50%;background:radial-gradient(circle,rgba(26,108,240,.06) 0%,transparent 70%);
  pointer-events:none;
}
.hero::after{
  content:'';position:absolute;bottom:-120px;left:-100px;width:400px;height:400px;
  border-radius:50%;background:radial-gradient(circle,rgba(245,158,11,.04) 0%,transparent 70%);
  pointer-events:none;
}
.hero-in{
  max-width:1280px;margin:0 auto;padding:0 36px;
  display:grid;grid-template-columns:1fr 1fr;gap:72px;align-items:center;position:relative;z-index:1;
}
.hero-l .chip{
  display:inline-flex;align-items:center;gap:8px;
  padding:6px 16px;border-radius:20px;background:var(--card);border:1px solid var(--bdr);
  font-size:13px;font-weight:600;color:var(--txt2);margin-bottom:28px;box-shadow:var(--sh);
}
.hero-l .chip .dot{width:8px;height:8px;border-radius:50%;background:#22c55e;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-l h1{font-size:clamp(36px,5.5vw,56px);font-weight:900;line-height:1.08;letter-spacing:-1.2px;margin-bottom:20px}
.hero-l h1 em{font-style:normal;color:var(--pri);position:relative}
.hero-l h1 em::after{content:'';position:absolute;bottom:2px;left:0;right:0;height:6px;background:rgba(26,108,240,.12);border-radius:3px;z-index:-1}
.hero-l .desc{font-size:16px;color:var(--txt2);line-height:1.75;margin-bottom:36px;max-width:440px}
.hero-btns{display:flex;gap:12px;align-items:center;flex-wrap:wrap}
.hero-btns .tip{font-size:12px;color:var(--txt3)}

/* ---- Buttons ---- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:24px;font-size:14px;font-weight:600;transition:all .3s var(--fx);cursor:pointer;border:none;white-space:nowrap}
.btn-pri{background:var(--pri);color:#fff;box-shadow:0 6px 20px rgba(26,108,240,.28)}
.btn-pri:hover{background:var(--pri-d);transform:translateY(-2px);box-shadow:0 12px 30px rgba(26,108,240,.4)}
.btn-out{background:var(--card);color:var(--txt);border:1.5px solid var(--bdr)}
.btn-out:hover{border-color:var(--pri);color:var(--pri)}
.btn-ghost{background:var(--bg2);color:var(--txt2)}
.btn-ghost:hover{background:var(--bdr)}

/* ---- Hero Visual ---- */
.hero-r{position:relative;display:flex;justify-content:center}
.hero-r .mock{
  background:var(--card);border:1px solid var(--bdr);border-radius:16px;
  box-shadow:var(--sh-lg);overflow:hidden;width:100%;max-width:380px;
}
.mock-bar{padding:10px 16px;background:var(--bg2);border-bottom:1px solid var(--bdr);display:flex;align-items:center;gap:6px}
.mock-bar span{width:10px;height:10px;border-radius:50%}
.mock-bar span:nth-child(1){background:#ef4444}
.mock-bar span:nth-child(2){background:#f59e0b}
.mock-bar span:nth-child(3){background:#22c55e}
.mock-body{padding:20px 22px}
.mock-body .mb-t{font-size:16px;font-weight:700;color:var(--txt);margin-bottom:12px;padding-bottom:10px;border-bottom:2px solid var(--bg2)}
.mock-body .mb-txt{font-size:11px;color:var(--txt3);line-height:2.2}
.mock-body .mb-hl{color:var(--pri);background:var(--pri-l);padding:1px 4px;border-radius:3px;font-weight:600}
.mock-body .mb-btn{display:inline-block;margin-top:16px;padding:8px 20px;background:var(--pri);color:#fff;border-radius:6px;font-size:10px;font-weight:700}
.hero-r .float-card{
  position:absolute;bottom:-18px;left:-24px;
  background:var(--card);border:1px solid var(--bdr);border-radius:12px;
  padding:12px 18px;box-shadow:var(--sh);display:flex;align-items:center;gap:12px;
}
.float-card .fc-icon{width:36px;height:36px;border-radius:8px;background:var(--pri-l);display:grid;place-items:center;font-size:16px}
.float-card .fc-txt strong{display:block;font-size:12px;color:var(--txt)}
.float-card .fc-txt span{font-size:10px;color:var(--txt3)}

/* ---- Stats strip ---- */
.strip{max-width:1280px;margin:0 auto;padding:0 36px 80px;position:relative;z-index:1}
.strip-in{
  display:flex;align-items:center;justify-content:center;gap:48px;flex-wrap:wrap;
  background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);
  padding:32px 48px;box-shadow:var(--sh);
}
.st{padding:0 28px;text-align:center;border-right:1px solid var(--bg2)}
.st:last-child{border-right:none}
.st .st-num{font-size:32px;font-weight:900;color:var(--pri);letter-spacing:-.5px}
.st .st-lbl{font-size:12px;color:var(--txt3);margin-top:4px}

/* ---- Sections ---- */
.sec{max-width:1280px;margin:0 auto;padding:60px 36px}
.sec-hd{text-align:center;margin-bottom:52px}
.sec-hd .badge{display:inline-block;padding:5px 14px;border-radius:20px;background:var(--pri-l);color:var(--pri);font-size:12px;font-weight:700;letter-spacing:.6px;margin-bottom:16px}
.sec-hd h2{font-size:clamp(26px,4vw,38px);font-weight:800;letter-spacing:-.5px;margin-bottom:10px}
.sec-hd p{color:var(--txt3);font-size:14px;max-width:500px;margin:0 auto}

/* ---- Features grid ---- */
.feat-wrap{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feat{
  background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);
  padding:34px 28px;transition:all .35s var(--fx);position:relative;overflow:hidden;
}
.feat::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;background:var(--pri);opacity:0;transition:opacity .35s}
.feat:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:transparent}
.feat:hover::before{opacity:1}
.feat .f-ico{width:48px;height:48px;border-radius:12px;background:var(--pri-l);display:grid;place-items:center;font-size:22px;margin-bottom:18px}
.feat h3{font-size:16px;font-weight:700;margin-bottom:8px}
.feat p{font-size:13px;color:var(--txt3);line-height:1.7}

/* ---- Apps row ---- */
.apps{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.app{
  background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);
  padding:40px 30px;text-align:center;transition:all .35s var(--fx);
}
.app:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:transparent}
.app .a-emoji{font-size:48px;margin-bottom:14px;display:block}
.app .a-tag{display:inline-block;padding:3px 12px;border-radius:6px;font-size:10px;font-weight:700;margin-bottom:12px}
.app .a-tag.t1{background:rgba(26,108,240,.08);color:var(--pri)}
.app .a-tag.t2{background:rgba(34,197,94,.08);color:#16a34a}
.app .a-tag.t3{background:rgba(245,158,11,.08);color:#d97706}
.app h3{font-size:17px;font-weight:700;margin-bottom:6px}
.app p{font-size:12px;color:var(--txt3);line-height:1.6}

/* ---- Scene section ---- */
.scene-bg{background:var(--bg2);border-top:1px solid var(--bdr);border-bottom:1px solid var(--bdr)}
.scenes{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.sc-card{
  background:var(--card);border:1px solid var(--bdr);border-radius:var(--rs);
  padding:28px 20px;text-align:center;transition:all .3s
}
.sc-card:hover{transform:translateY(-3px);box-shadow:var(--sh);border-color:var(--pri)}
.sc-card .sc-ico{font-size:34px;margin-bottom:10px;display:block}
.sc-card h4{font-size:13px;font-weight:700;margin-bottom:2px}
.sc-card span{font-size:11px;color:var(--txt3)}

/* ---- FAQ ---- */
.faq{max-width:720px;margin:0 auto;display:flex;flex-direction:column;gap:8px}
.faq-item{background:var(--card);border:1px solid var(--bdr);border-radius:var(--rs);overflow:hidden;transition:all .25s}
.faq-item:hover{border-color:#cbd5e1}
.faq-q{
  width:100%;padding:18px 24px;background:none;border:none;
  font-family:inherit;font-size:14px;font-weight:600;color:var(--txt);
  text-align:left;cursor:pointer;display:flex;justify-content:space-between;align-items:center;
}
.faq-q .arr{font-size:12px;color:var(--pri);transition:transform .3s}
.faq-a{font-size:13px;color:var(--txt2);line-height:1.8;padding:0 24px 18px;display:none}
.faq-item.open .faq-a{display:block}
.faq-item.open .arr{transform:rotate(180deg)}

/* ---- CTA ---- */
.cta-wrap{max-width:1280px;margin:0 auto;padding:60px 36px}
.cta{
  background:linear-gradient(135deg,#ebf2fe 0%,#fef3c7 100%);
  border:1px solid rgba(26,108,240,.08);border-radius:var(--r);
  padding:64px 48px;text-align:center;
}
.cta h2{font-size:clamp(26px,4vw,34px);font-weight:800;margin-bottom:12px}
.cta p{color:var(--txt2);font-size:15px;margin-bottom:28px}
.cta-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---- Footer ---- */
.ft{background:var(--bg2);border-top:1px solid var(--bdr)}
.ft-grid{
  max-width:1280px;margin:0 auto;padding:56px 36px 32px;
  display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:48px;
}
.ft-b .ft-logo{display:flex;align-items:center;gap:8px;font-size:16px;font-weight:800;margin-bottom:12px}
.ft-b .ft-logo .fl{width:28px;height:28px;border-radius:8px;background:var(--pri);display:grid;place-items:center;color:#fff;font-size:12px;font-weight:900}
.ft-b .ft-logo em{font-style:normal;color:var(--pri)}
.ft-b p{font-size:12px;color:var(--txt3);line-height:1.7;max-width:240px}
.ft-c h4{font-size:12px;font-weight:700;margin-bottom:14px;text-transform:uppercase;letter-spacing:.6px;color:var(--txt2)}
.ft-c a{display:block;font-size:12px;color:var(--txt3);padding:5px 0;transition:color .2s}
.ft-c a:hover{color:var(--pri)}
.ft-btm{
  max-width:1280px;margin:0 auto;padding:16px 36px;border-top:1px solid var(--bdr);
  display:flex;justify-content:space-between;font-size:11px;color:var(--txt3);flex-wrap:wrap;gap:8px;
}

/* ================ Download Page ================ */
.dl-hero{padding:140px 0 60px;text-align:center}
.dl-hero h1{font-size:clamp(28px,4vw,40px);font-weight:900;margin-bottom:12px}
.dl-hero .dl-sub{color:var(--txt2);font-size:15px;margin-bottom:20px;max-width:560px;margin-inline:auto}
.dl-meta{display:inline-flex;gap:20px;font-size:12px;color:var(--txt3);flex-wrap:wrap;justify-content:center}
.dl-grid{max-width:1280px;margin:0 auto 56px;padding:0 36px;display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.dl-card{
  background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);
  padding:36px 28px;text-align:center;transition:all .35s var(--fx);
  display:flex;flex-direction:column;gap:14px
}
.dl-card:hover{transform:translateY(-4px);box-shadow:var(--sh-lg);border-color:var(--pri)}
.dl-card .dl-tag{padding:4px 14px;border-radius:20px;font-size:11px;font-weight:700;background:var(--pri-l);color:var(--pri);align-self:center}
.dl-card h3{font-size:18px;font-weight:700}
.dl-card .dl-desc{font-size:12px;color:var(--txt3);line-height:1.6}
.dl-card .dl-ver{font-size:11px;color:var(--txt3);padding:5px 12px;background:var(--bg2);border-radius:6px;align-self:center}
.dl-card .dl-btns{display:flex;gap:8px}
.dl-card .dl-btns .btn{flex:1;justify-content:center}
.dl-steps{max-width:1280px;margin:0 auto 56px;padding:0 36px;display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.dl-step{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--bdr);border-radius:var(--rs);padding:22px 20px}
.dl-step .step-n{width:32px;height:32px;border-radius:8px;background:var(--pri);color:#fff;display:grid;place-items:center;font-size:13px;font-weight:800;flex-shrink:0}
.dl-step .step-txt strong{display:block;font-size:13px;margin-bottom:4px}
.dl-step .step-txt p{font-size:11px;color:var(--txt3);line-height:1.5}
.dl-spec{max-width:800px;margin:0 auto;background:var(--card);border:1px solid var(--bdr);border-radius:var(--r);overflow:hidden}
.dl-spec .sr{display:grid;grid-template-columns:140px 1fr;border-bottom:1px solid var(--bdr)}
.dl-spec .sr:last-child{border-bottom:none}
.dl-spec .sl{padding:14px 20px;background:var(--pri-l);font-size:12px;font-weight:700;color:var(--pri)}
.dl-spec .sv{padding:14px 20px;font-size:12px;color:var(--txt2)}

/* ================ 404 Page ================ */
.err-page{min-height:100vh;display:grid;place-items:center;background:var(--bg);padding:24px}
.err-box{
  max-width:500px;text-align:center;background:var(--card);
  border:1px solid var(--bdr);border-radius:var(--r);padding:64px 48px;box-shadow:var(--sh-lg)
}
.err-box .e404{font-size:clamp(80px,14vw,130px);font-weight:900;color:var(--pri);line-height:1;margin-bottom:4px}
.err-box h1{font-size:20px;font-weight:700;margin-bottom:10px}
.err-box p{color:var(--txt3);font-size:13px;line-height:1.7;margin-bottom:28px}
.err-box .e-btns{display:flex;gap:10px;justify-content:center;flex-wrap:wrap}

/* ================ Responsive ================ */
@media(max-width:1024px){
  .hero-in{grid-template-columns:1fr;gap:48px;text-align:center}
  .hero-l .desc{margin-inline:auto}
  .hero-btns{justify-content:center}
  .hero-r{display:none}
  .feat-wrap,.apps{grid-template-columns:repeat(2,1fr)}
  .scenes{grid-template-columns:repeat(2,1fr)}
  .ft-grid{grid-template-columns:repeat(2,1fr)}
  .dl-grid{grid-template-columns:repeat(2,1fr)}
}
@media(max-width:768px){
  .nav-links{display:none}
  .nav-tgl{display:block}
  .nav-links.open{display:flex;flex-direction:column;position:absolute;top:64px;left:0;right:0;background:var(--card);border-bottom:1px solid var(--bdr);padding:12px 20px;gap:4px;z-index:99}
  .hero{padding:130px 0 60px}
  .feat-wrap,.apps,.dl-grid,.dl-steps{grid-template-columns:1fr}
  .scenes{grid-template-columns:repeat(2,1fr)}
  .ft-grid{grid-template-columns:1fr;gap:32px}
  .sec{padding:48px 20px}
  .cta{padding:44px 24px}
  .strip-in{flex-direction:column;gap:24px;padding:28px 32px}
  .st{border-right:none;border-bottom:1px solid var(--bg2);padding:12px 0}
  .st:last-child{border-bottom:none}
}