:root{
  --primary:#FF6B35;
  --primary-dark:#E8531F;
  --primary-soft:#FFF1E9;
  --dark:#24272E;
  --text:#24272E;
  --text-2:#5B6270;
  --bg:#F7F8FB;
  --card:#FFFFFF;
  --border:#E9EBF0;
  --ok:#22A45D;
  --no:#B9BFCA;
  --star:#FFB020;
  --primary-2:#FF9A5C;
  --bg-soft:#FFF7F0;
  --dark-2:#17181C;
  --muted:#9AA1AC;
  --muted-2:#6E747F;
  --on-dark:#C7CBD5;
  --radius:16px;
  --radius-sm:12px;
  --shadow:0 8px 24px rgba(36,39,46,.06);
  --shadow-hover:0 16px 36px rgba(36,39,46,.13)
}

*{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",sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased}
a{text-decoration:none;color:inherit}
img{display:block;max-width:100%}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:84px 0}

.header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 6px 20px rgba(36,39,46,.06)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:66px}
.logo{display:flex;align-items:center;gap:8px;font-size:22px;font-weight:800;color:var(--dark);white-space:nowrap}
.logo-dot{width:10px;height:10px;border-radius:50%;background:var(--primary)}
.nav{display:flex;align-items:center;gap:20px}
.nav a{font-size:14px;color:var(--text-2);transition:color .2s;white-space:nowrap}
.nav a:hover{color:var(--primary)}
.btn-download{display:inline-flex;align-items:center;justify-content:center;padding:7px 16px;border-radius:999px;background:var(--primary);color:#fff;font-size:13px;font-weight:600;transition:background .2s,transform .2s;white-space:nowrap}
.btn-download:hover{background:var(--primary-dark);transform:translateY(-1px)}

.hero{background:linear-gradient(180deg,var(--bg-soft) 0%,var(--bg) 100%);padding:72px 0 84px}
.hero-inner{display:flex;align-items:center;gap:56px}
.hero-text{flex:1.1}
.hero-badge{display:inline-flex;align-items:center;padding:6px 14px;border-radius:999px;background:var(--primary-soft);color:var(--primary-dark);font-size:13px;font-weight:600;margin-bottom:16px}
.hero h1{font-size:42px;line-height:1.35;font-weight:800}
.hero-desc{margin:20px 0 30px;font-size:16px;color:var(--text-2);max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 30px;border-radius:var(--radius-sm);background:var(--primary);color:#fff;font-size:16px;font-weight:600;transition:background .25s,transform .25s,box-shadow .25s;white-space:nowrap}
.btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-ghost{background:#fff;color:var(--primary);border:1px solid var(--primary)}
.btn-ghost:hover{background:var(--primary-soft);box-shadow:var(--shadow)}
.hero-img{flex:1}
.hero-img img,.preview-grid img{width:100%;height:auto;border-radius:var(--radius);box-shadow:var(--shadow)}

.section-title{font-size:32px;line-height:1.4;text-align:center;font-weight:800}
.section-sub{text-align:center;color:var(--text-2);font-size:15px;margin:10px 0 48px}
.feature-card,.stat-card,.review-card{transition:transform .3s,box-shadow .3s}
.feature-card:hover,.stat-card:hover,.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

.preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.preview-grid img{transition:transform .3s,box-shadow .3s;background:var(--card)}
.preview-grid img:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

.intro{background:#fff}
.intro-inner{display:flex;gap:56px;align-items:flex-start}
.intro-text{flex:1.2}
.intro-text .section-title,.intro-text .section-sub{text-align:left}
.intro-text .section-sub{margin-bottom:24px}
.intro-p{font-size:15.5px;color:var(--text-2);margin-bottom:16px;text-align:justify}
.intro-card{flex:1;background:var(--bg);border:1px solid var(--border);border-radius:var(--radius);padding:30px;position:sticky;top:96px}
.intro-card h3{font-size:18px;margin-bottom:18px;color:var(--dark)}
.intro-card ul{list-style:none}
.intro-card li{position:relative;padding:10px 0 10px 30px;color:var(--text-2);font-size:15px}
.intro-card li::before{content:"";position:absolute;left:4px;top:17px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:30px 26px}
.feature-icon{width:52px;height:52px;border-radius:14px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:18px}
.feature-card h3{font-size:18px;margin-bottom:10px}
.feature-card p{font-size:14.5px;color:var(--text-2)}

.compare-wrap{overflow-x:auto;border-radius:var(--radius);box-shadow:var(--shadow)}
.compare-table{width:100%;border-collapse:collapse;background:var(--card);text-align:center;table-layout:fixed}
.compare-table th,.compare-table td{padding:16px 12px;border-bottom:1px solid var(--border);font-size:15px;word-break:break-word}
.compare-table thead th{background:var(--dark);color:#fff;font-weight:600}
.compare-table thead th:first-child{width:22%}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-table td:first-child{font-weight:600;color:var(--text)}
.compare-table .col-mine{background:var(--primary-soft);color:var(--primary-dark);font-weight:700}
.ok{color:var(--ok);font-weight:700}
.no{color:var(--no);font-weight:700}
.mid{color:var(--text-2)}

.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);text-align:center;padding:34px 16px}
.stat-num{font-size:42px;font-weight:800;color:var(--primary);line-height:1.2}
.stat-label{color:var(--text-2);font-size:14px;margin-top:10px}

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

.update-card{max-width:840px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow)}
.update-head{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap}
.version-badge{display:inline-flex;align-items:center;padding:7px 18px;border-radius:999px;background:var(--primary);color:#fff;font-weight:700;font-size:16px}
.update-time{color:var(--text-2);font-size:14px}
.update-list{margin-top:22px;list-style:none}
.update-list li{position:relative;padding:9px 0 9px 26px;color:var(--text-2);font-size:15px}
.update-list li::before{content:"";position:absolute;left:4px;top:18px;width:7px;height:7px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:840px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;transition:box-shadow .3s}
.faq-item.active{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;padding:19px 24px;background:none;border:none;cursor:pointer;font-size:16px;font-weight:600;color:var(--dark);text-align:left}
.faq-q .arrow{flex-shrink:0;width:26px;height:26px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;transition:transform .3s}
.faq-item.active .arrow{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 24px 20px;font-size:15px;color:var(--text-2)}

.download{background:var(--dark);color:#fff;text-align:center}
.download .container{max-width:780px}
.download h1{font-size:38px;line-height:1.4}
.download-meta{margin:20px 0 32px;color:var(--on-dark);font-size:15px;display:flex;justify-content:center;align-items:center;gap:14px}
.download-btns{display:flex;justify-content:center;gap:18px;flex-wrap:wrap}
.btn-lg{padding:15px 36px}
.btn-outline{background:transparent;color:#fff;border:1px solid rgba(255,255,255,.65)}
.btn-outline:hover{background:rgba(255,255,255,.12);box-shadow:none}
.download-tip{margin-top:28px;color:var(--on-dark);font-size:14px}

.footer{background:var(--dark-2);color:var(--muted);text-align:center;padding:30px 0;font-size:14px}
.footer a{color:#fff}
.footer a:hover{color:var(--primary)}
.footer-copy{margin-top:6px;color:var(--muted-2);font-size:13px}

.back-top{position:fixed;right:26px;bottom:26px;z-index:90;width:46px;height:46px;border-radius:50%;background:var(--primary);color:#fff;border:none;cursor:pointer;font-size:20px;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s,visibility .3s,transform .3s,background .2s}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{background:var(--primary-dark)}

@media (max-width:992px){
  .nav{gap:14px}
  .hero h1{font-size:34px}
  .preview-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:768px){
  .container{padding:0 20px}
  section{padding:56px 0}
  .nav{display:none}
  .header-inner{height:60px}
  .logo{font-size:20px}
  .btn-download{padding:6px 14px;font-size:12px}
  .hero{padding:44px 0 56px}
  .hero-inner{flex-direction:column;gap:26px}
  .hero h1{font-size:27px}
  .hero-desc{font-size:15px;margin:16px 0 24px}
  .hero-btns{flex-direction:column;width:100%;gap:12px}
  .hero-btns .btn{width:100%}
  .section-title{font-size:24px}
  .section-sub{margin-bottom:32px;font-size:14px}
  .preview-grid{grid-template-columns:1fr;gap:20px}
  .feature-grid,.review-grid,.stats-grid{grid-template-columns:1fr}
  .intro-inner{flex-direction:column;gap:28px}
  .intro-card{position:static}
  .compare-table th,.compare-table td{padding:12px 6px;font-size:13px}
  .update-card{padding:24px}
  .download h1{font-size:26px}
  .download-meta{font-size:12px;white-space:nowrap;gap:8px}
  .download-btns{flex-direction:column;width:100%;gap:12px}
  .download-btns .btn{width:100%}
  .back-top{right:16px;bottom:16px;width:42px;height:42px}
}