:root{
  --primary:#16a34a;
  --primary-dark:#0e7a36;
  --primary-light:#e8f7ee;
  --accent:#7ee2a3;
  --dark:#0c1f15;
  --dark-2:#17452a;
  --dark-3:#08140d;
  --border:#e3f0e8;
  --border-strong:#bfe8cf;
  --bg:#f6faf7;
  --green-bright:#22c55e;
  --star:#f5b50a;
  --text:#16251c;
  --text-2:#56685d;
  --white:#ffffff;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 8px 28px rgba(12,80,40,.10);
  --shadow-hover:0 16px 36px rgba(12,80,40,.16);
  --nav-h:64px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 16px)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block}
a{color:inherit}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:84px 0}

.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{font-size:34px;font-weight:800;line-height:1.3}
.sec-head p{color:var(--text-2);margin-top:10px;font-size:16px}
.sec-head.light h2{color:var(--white)}
.sec-head.light p{color:rgba(255,255,255,.72)}

.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;font-weight:600;border-radius:999px;border:1px solid transparent;cursor:pointer;transition:transform .25s,box-shadow .25s,background-color .25s,color .25s,border-color .25s;white-space:nowrap}
.btn-primary{background:var(--primary);color:var(--white);padding:12px 30px;font-size:15px}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 26px rgba(22,163,74,.32)}
.btn-outline{background:transparent;color:var(--white);border-color:rgba(255,255,255,.65);padding:12px 30px;font-size:15px}
.btn-outline:hover{border-color:var(--white);background:rgba(255,255,255,.12);transform:translateY(-2px)}
.btn-lg{padding:14px 34px;font-size:16px}
.btn-xl{padding:16px 42px;font-size:17px}

.site-header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.9);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:0 4px 18px rgba(12,40,24,.08)}
.header-inner{display:flex;align-items:center;height:var(--nav-h)}
.brand{display:flex;align-items:center;gap:9px;text-decoration:none;font-size:20px;font-weight:800;color:var(--text);flex:none}
.brand-ico{width:30px;height:30px;flex:none;display:flex;align-items:center;justify-content:center}
.brand-ico svg{width:100%;height:100%;display:block}
.nav-links{display:flex;margin:0 auto;gap:2px}
.nav-links a{text-decoration:none;font-size:14px;color:var(--text-2);padding:8px 11px;border-radius:8px;transition:color .2s,background-color .2s}
.nav-links a:hover{color:var(--primary);background:var(--primary-light)}
.nav-links a.active{color:var(--primary);font-weight:600;background:var(--primary-light)}
.nav-btn{margin-left:8px;padding:8px 18px;font-size:13px;flex:none}

.hero{background:radial-gradient(1100px 620px at 82% -12%,var(--dark-2) 0%,var(--dark) 58%);color:var(--white);padding:calc(var(--nav-h) + 58px) 0 86px;overflow:hidden}
.hero-inner{display:grid;grid-template-columns:1.12fr .88fr;gap:60px;align-items:center}
.hero-text h1{font-size:46px;font-weight:800;line-height:1.22}
.ver{color:var(--accent)}
.hero-desc{margin:20px 0 30px;font-size:17px;color:rgba(255,255,255,.82);max-width:540px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-points{display:flex;gap:20px;margin-top:30px;font-size:14px;color:rgba(255,255,255,.78);flex-wrap:wrap}
.hero-points li{display:flex;align-items:center;gap:7px}
.hero-points li::before{content:"✓";color:var(--accent);font-weight:700}
.hero-media img{width:100%;border-radius:20px;box-shadow:0 26px 64px rgba(0,0,0,.42);border:6px solid rgba(255,255,255,.14)}

.preview{background:var(--white)}
.preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.preview-card img{width:100%}

.intro{background:var(--bg)}
.intro-cols{display:grid;grid-template-columns:1fr 1fr;gap:36px;max-width:960px;margin:0 auto}
.intro-cols p{font-size:16px;color:var(--text-2)}
.intro-chips{display:flex;justify-content:center;gap:14px;flex-wrap:wrap;margin-top:36px}
.intro-chips li{background:var(--white);border:1px solid var(--border);color:var(--primary-dark);font-size:14px;font-weight:600;padding:9px 22px;border-radius:999px}

.features{background:var(--white)}
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.f-card{padding:30px}
.f-ico{width:48px;height:48px;border-radius:12px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.f-ico svg{width:25px;height:25px}
.f-card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.f-card p{font-size:14px;color:var(--text-2)}

.compare{background:var(--bg)}
.compare-table{max-width:960px;margin:0 auto;background:var(--white);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden}
.ct-row{display:grid;grid-template-columns:1fr 1.15fr 1.15fr}
.ct-cell{display:flex;align-items:center;padding:16px 22px;font-size:15px;color:var(--text-2);border-bottom:1px solid var(--border)}
.ct-row:last-child .ct-cell{border-bottom:none}
.ct-head{background:var(--dark)}
.ct-head .ct-cell{color:var(--white);font-weight:600;border-bottom:1px solid rgba(255,255,255,.1)}
.ct-main{color:var(--text);font-weight:600}
.ct-head .ct-main{color:var(--accent)}

.stats{background:radial-gradient(1000px 520px at 18% 0%,var(--dark-2) 0%,var(--dark) 60%);color:var(--white)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{text-align:center;padding:34px 18px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.13);border-radius:var(--radius);transition:transform .3s,background-color .3s}
.stat:hover{transform:translateY(-6px);background:rgba(255,255,255,.1)}
.stat strong{display:block;font-size:42px;font-weight:800;color:var(--accent);line-height:1.1}
.stat span{display:block;margin-top:8px;font-size:15px;color:rgba(255,255,255,.82)}

.reviews{background:var(--white)}
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:26px}
.rv-top{display:flex;align-items:center;gap:13px;margin-bottom:14px}
.rv-avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--green-bright),var(--primary-dark));color:var(--white);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex:none}
.rv-meta{line-height:1.35}
.rv-meta strong{display:block;font-size:15px}
.stars{color:var(--star);font-size:13px;letter-spacing:2px}
.review p{font-size:14px;color:var(--text-2)}

.updates{background:var(--bg)}
.update-card{max-width:820px;margin:0 auto;padding:34px}
.uv-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-bottom:22px;margin-bottom:6px;border-bottom:1px solid var(--border)}
.ver-badge{background:var(--primary-light);color:var(--primary-dark);font-weight:800;padding:7px 16px;border-radius:999px;font-size:15px}
.date{color:var(--text-2);font-size:14px}
.changelog li{padding:11px 0 11px 32px;position:relative;font-size:15px;color:var(--text-2);border-bottom:1px dashed var(--border)}
.changelog li:last-child{border-bottom:none}
.changelog li::before{content:"✓";position:absolute;left:2px;color:var(--primary);font-weight:700}

.faq{background:var(--white)}
.faq-list{max-width:820px;margin:0 auto}
.faq-item{border:1px solid var(--border);border-radius:var(--radius-sm);background:var(--white);margin-bottom:14px;overflow:hidden;transition:box-shadow .3s,border-color .3s}
.faq-item:hover{box-shadow:var(--shadow)}
.faq-item.open{border-color:var(--border-strong)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 24px;background:none;border:none;cursor:pointer;font-size:16px;font-weight:600;color:var(--text);text-align:left}
.faq-ico{width:22px;height:22px;flex:none;position:relative;transition:transform .3s}
.faq-ico::before,.faq-ico::after{content:"";position:absolute;background:var(--primary);border-radius:2px}
.faq-ico::before{left:3px;right:3px;top:10px;height:2px}
.faq-ico::after{top:3px;bottom:3px;left:10px;width:2px}
.faq-item.open .faq-ico{transform:rotate(45deg)}
.faq-panel{display:grid;grid-template-rows:0fr;transition:grid-template-rows .32s ease}
.faq-item.open .faq-panel{grid-template-rows:1fr}
.faq-panel-inner{overflow:hidden}
.faq-panel-inner p{padding:0 24px 22px;font-size:15px;color:var(--text-2)}

.download{background:radial-gradient(1100px 560px at 80% 115%,var(--dark-2) 0%,var(--dark) 62%);color:var(--white);text-align:center}
.download h1{font-size:42px;font-weight:800}
.dl-meta{color:rgba(255,255,255,.75);font-size:15px;margin:16px 0 32px}
.dl-btns{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.dl-tip{margin-top:30px;font-size:15px;color:rgba(255,255,255,.88)}

.site-footer{background:var(--dark-3);color:rgba(255,255,255,.62);padding:30px 0;text-align:center;font-size:14px}
.footer-link{color:var(--accent);text-decoration:none}

.back-top{position:fixed;right:26px;bottom:30px;width:46px;height:46px;border-radius:50%;border:none;background:var(--primary);color:var(--white);font-size:20px;cursor:pointer;box-shadow:0 8px 22px rgba(22,163,74,.38);opacity:0;visibility:hidden;transform:translateY(14px);transition:opacity .3s,transform .3s,visibility .3s,background-color .3s;z-index:90}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{background:var(--primary-dark)}

@media (max-width:1024px){
  section{padding:68px 0}
  .sec-head h2{font-size:30px}
  .hero h1{font-size:38px}
  .preview-grid,.features-grid,.reviews-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .intro-cols{grid-template-columns:1fr;gap:20px}
}

@media (max-width:900px){
  .nav-links{display:none}
  .nav-btn{margin-left:auto}
}

@media (max-width:768px){
  :root{--nav-h:58px}
  .container{padding:0 20px}
  section{padding:56px 0}
  .sec-head{margin-bottom:34px}
  .sec-head h2{font-size:26px}
  .sec-head p{font-size:14px}
  .hero{padding:calc(var(--nav-h) + 34px) 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:38px}
  .hero-text h1{font-size:30px}
  .hero-desc{font-size:15px;margin:16px 0 24px}
  .hero-btns{flex-direction:column}
  .hero-btns .btn{width:100%}
  .hero-points{gap:12px 18px;margin-top:24px;font-size:13px}
  .preview-grid{grid-template-columns:1fr;gap:20px}
  .features-grid{grid-template-columns:1fr;gap:20px}
  .intro-chips{margin-top:28px}
  .compare-table{border-radius:var(--radius-sm)}
  .ct-cell{padding:12px 10px;font-size:12.5px}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .stat{padding:26px 12px}
  .stat strong{font-size:26px}
  .stat span{font-size:13px}
  .reviews-grid{grid-template-columns:1fr;gap:20px}
  .update-card{padding:24px}
  .uv-top{flex-direction:column;align-items:flex-start;gap:10px}
  .faq-q{padding:16px 18px;font-size:15px}
  .faq-panel-inner p{padding:0 18px 18px;font-size:14px}
  .download h1{font-size:30px}
  .dl-meta{font-size:12px;white-space:nowrap;margin:14px 0 24px}
  .dl-btns{flex-direction:column}
  .dl-btns .btn{width:100%}
  .btn-xl{padding:15px 20px;font-size:16px}
  .dl-tip{font-size:13px;margin-top:24px}
  .site-footer{font-size:13px;padding:24px 16px}
  .back-top{right:16px;bottom:20px;width:42px;height:42px}
}

@media (max-width:380px){
  .stats-grid{grid-template-columns:1fr 1fr;gap:12px}
  .stat strong{font-size:23px}
}