:root{
  --primary:#C2622F;
  --primary-dark:#A84B1D;
  --primary-light:#FBE9DC;
  --dark:#2C1E14;
  --text:#45352A;
  --muted:#8A7360;
  --bg:#FBF6F1;
  --card:#FFFFFF;
  --border:#EFE1D2;
  --radius:16px;
  --shadow:0 10px 26px rgba(194,98,47,.14);
  --nav-h:64px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;width:100%;height:auto}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:84px 0}
.section-alt{background:#fff}
.section-title{text-align:center;font-size:clamp(24px,3vw,34px);color:var(--dark);font-weight:800;line-height:1.3}
.section-title::after{content:"";display:block;width:56px;height:4px;border-radius:2px;background:linear-gradient(90deg,var(--primary),#E08A5C);margin:14px auto 0}
.section-sub{text-align:center;color:var(--muted);margin:12px 0 44px;font-size:15px}
.reveal{opacity:0;transition:opacity .6s ease}
.reveal.in{opacity:1}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);transition:transform .3s,box-shadow .3s}
.card:hover{transform:translateY(-4px);box-shadow:var(--shadow)}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:var(--nav-h);gap:16px}
.logo{display:flex;align-items:center;gap:8px;font-size:21px;font-weight:800;color:var(--dark);white-space:nowrap}
.logo-mark{width:30px;height:30px;border-radius:9px;background:linear-gradient(135deg,var(--primary),#E08A5C);color:#fff;display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700}
.nav-menu{display:flex;gap:2px}
.nav-menu a{font-size:14px;color:var(--text);padding:8px 10px;border-radius:8px;transition:.2s;white-space:nowrap}
.nav-menu a:hover{color:var(--primary);background:var(--primary-light)}
.nav-menu a.active{color:var(--primary);font-weight:700}
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:999px;font-weight:700;transition:transform .25s,box-shadow .25s,background .25s,color .25s;cursor:pointer;border:none}
.btn:hover{transform:translateY(-2px)}
.btn-nav{font-size:12.5px;padding:5px 13px;background:linear-gradient(135deg,var(--primary),#E08A5C);color:#fff;box-shadow:0 4px 12px rgba(194,98,47,.3)}
.btn-nav:hover{box-shadow:0 8px 18px rgba(194,98,47,.38)}
.btn-primary{background:linear-gradient(135deg,var(--primary),#E08A5C);color:#fff;box-shadow:0 8px 20px rgba(194,98,47,.28)}
.btn-primary:hover{box-shadow:0 12px 26px rgba(194,98,47,.36)}
.btn-ghost{background:#fff;color:var(--primary-dark);border:1.5px solid var(--primary)}
.btn-ghost:hover{background:var(--primary-light)}
.btn-lg{font-size:15.5px;padding:13px 30px}
.btn-xl{font-size:16.5px;padding:16px 38px}

.hero{padding:calc(var(--nav-h) + 64px) 0 80px;background:radial-gradient(600px 400px at 10% 6%,var(--primary-light),transparent 62%),radial-gradient(520px 380px at 92% 92%,#F6E6D6,transparent 58%)}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero-text h1{font-size:clamp(30px,4vw,46px);color:var(--dark);line-height:1.25;font-weight:800}
.ver{display:inline-block;color:var(--primary);background:var(--primary-light);padding:3px 12px;border-radius:999px;font-size:.6em;font-weight:800;vertical-align:middle;margin-left:8px}
.hero-desc{margin:20px 0 32px;font-size:16px;color:var(--text);max-width:540px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-img img{border-radius:20px;box-shadow:0 24px 48px rgba(120,60,20,.22);max-width:460px;margin:0 auto}

.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.works-grid figure{padding:10px}
.works-grid img{border-radius:12px}

.intro-card{max-width:860px;margin:0 auto;padding:36px 40px}
.intro-card p{margin-bottom:14px;font-size:15.5px}
.intro-card p:last-child{margin-bottom:0}
.intro-points{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;max-width:920px;margin:24px auto 0}
.intro-points li{padding:22px 24px;display:flex;flex-direction:column;gap:6px;align-items:center;text-align:center}
.intro-points strong{color:var(--dark);font-size:17px}
.intro-points span{color:var(--muted);font-size:14px}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{padding:32px 28px}
.f-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-light);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.f-icon svg{width:26px;height:26px}
.feature h3{font-size:18px;color:var(--dark);margin-bottom:10px}
.feature p{font-size:14.5px;color:var(--muted)}

.compare{max-width:880px;margin:0 auto;overflow:hidden}
.compare-row{display:grid;grid-template-columns:1.1fr 1.35fr 1.35fr;align-items:center;padding:15px 20px;border-bottom:1px solid var(--border);font-size:14.5px}
.compare-row:last-child{border-bottom:none}
.compare-row > div:first-child{color:var(--muted)}
.compare-row > div:nth-child(2){color:var(--primary-dark);font-weight:700}
.compare-head{background:var(--dark);font-weight:700}
.compare-row.compare-head > div{color:#fff}

.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat{padding:32px 20px;text-align:center}
.stat strong{display:block;font-size:clamp(26px,3vw,40px);font-weight:800;color:var(--primary);line-height:1.2}
.stat span{font-size:14px;color:var(--muted)}

.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{padding:26px 26px 22px;display:flex;flex-direction:column;gap:16px}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#E08A5C);color:#fff;display:flex;align-items:center;justify-content:center;font-size:19px;font-weight:700;flex-shrink:0}
.review-user{display:flex;flex-direction:column;line-height:1.3}
.name{font-weight:700;color:var(--dark);font-size:15px}
.stars{color:#F5A623;font-size:14px;letter-spacing:2px}
.review-text{font-size:14.5px;color:var(--text)}

.update{max-width:780px;margin:0 auto;padding:36px 40px}
.update-head{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;padding-bottom:18px;border-bottom:1px dashed var(--border);margin-bottom:18px}
.update-ver{font-size:22px;font-weight:800;color:#fff;background:linear-gradient(135deg,var(--primary),#E08A5C);padding:6px 18px;border-radius:999px}
.update-date{color:var(--muted);font-size:14px}
.update-list li{position:relative;padding:9px 0 9px 24px;font-size:15px}
.update-list li::before{content:"";position:absolute;left:4px;top:17px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{border-radius:14px;overflow:hidden}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:18px 22px;background:transparent;border:none;font-size:16px;font-weight:700;color:var(--dark);cursor:pointer;text-align:left}
.faq-icon{position:relative;width:18px;height:18px;flex-shrink:0}
.faq-icon::before,.faq-icon::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .3s}
.faq-icon::before{left:0;top:8px;width:18px;height:2.5px}
.faq-icon::after{left:8px;top:0;width:2.5px;height:18px}
.faq-item.open .faq-icon::after{transform:rotate(90deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .35s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden}
.faq-a-inner p{padding:0 22px 20px;font-size:14.5px;color:var(--muted)}

.download{background:linear-gradient(160deg,#FBE9DC,var(--bg) 55%);text-align:center;padding:90px 0}
.download-title{font-size:clamp(28px,4vw,42px);color:var(--dark);font-weight:800}
.download-meta{display:flex;justify-content:center;gap:20px;margin:18px 0 30px;font-size:14px;color:var(--muted)}
.download-btns{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.download-tip{margin-top:26px;font-size:15px;color:var(--primary-dark);font-weight:600}

.footer{background:var(--dark);color:#CFC2B4;text-align:center;padding:34px 0;font-size:14px}
.footer a{color:#fff;font-weight:700;text-decoration:none;transition:color .2s}
.footer a:hover{color:#F0B391}

.back-top{position:fixed;right:28px;bottom:32px;width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#E08A5C);color:#fff;border:none;font-size:20px;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(10px);transition:.3s;z-index:99;box-shadow:0 8px 18px rgba(194,98,47,.35)}
.back-top.show{opacity:1;visibility:visible;transform:none}
.back-top:hover{transform:translateY(-3px)}

@media (max-width:1024px){
  .nav-menu a{font-size:13px;padding:8px 7px}
  .hero-inner{gap:36px}
}
@media (max-width:992px){
  .nav-menu{display:none}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .works-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:768px){
  .container{padding:0 20px}
  .hero{padding:calc(var(--nav-h) + 36px) 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:36px;text-align:center}
  .hero-desc{margin:18px auto 28px}
  .hero-btns{flex-direction:column;width:100%;max-width:360px;margin:0 auto}
  .hero-btns .btn{width:100%}
  .hero-img img{max-width:320px}
  .section{padding:60px 0}
  .section-sub{margin:10px 0 32px}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .intro-points{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:16px}
  .reviews-grid{grid-template-columns:1fr}
  .compare-row{padding:11px 8px;font-size:14px;grid-template-columns:.85fr 1.15fr 1.15fr}
  .download-meta{font-size:12px;gap:14px;white-space:nowrap}
  .download-btns{flex-direction:column;align-items:stretch;max-width:400px;margin:0 auto}
  .back-top{right:16px;bottom:20px;width:42px;height:42px}
  .update,.intro-card{padding:26px 22px}
  .faq-a-inner p{padding:0 18px 18px}
}