:root{
  --primary:#FF6A00;
  --primary-deep:#E85D00;
  --primary-soft:#FFF1E3;
  --dark:#20202A;
  --text:#2B2B33;
  --text-sub:#5C5C68;
  --border:#E9E9F0;
  --bg:#F7F8FB;
  --card:#FFFFFF;
  --radius:16px;
  --shadow:0 6px 22px rgba(32,32,42,.06);
  --shadow-hover:0 14px 34px rgba(255,106,0,.16);
  --nav-h:68px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 20px)}
body{font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1180px;margin:0 auto;padding:0 24px}
section{padding:76px 0}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);background:rgba(255,255,255,.92);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:100%}
.logo{display:inline-flex;align-items:center;padding:8px 10px;margin-left:-10px;font-size:23px;font-weight:800;color:var(--dark);letter-spacing:.5px}
.logo-hl{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:20px}
.nav-links a{font-size:14px;color:var(--text-sub);transition:color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--primary);font-weight:600}
.nav-btn{font-size:13px;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-deep));padding:9px 20px;border-radius:999px;box-shadow:0 4px 12px rgba(255,106,0,.24);transition:transform .2s,box-shadow .2s}
.nav-btn:hover{transform:translateY(-1px);box-shadow:0 6px 16px rgba(255,106,0,.32)}

.btn{display:inline-flex;align-items:center;justify-content:center;font-size:15px;font-weight:700;padding:14px 30px;border-radius:12px;transition:transform .25s ease,box-shadow .25s ease}
.btn-primary{color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-deep));box-shadow:0 8px 20px rgba(255,106,0,.28)}
.btn-ghost{color:var(--primary);background:var(--card);border:1px solid var(--primary)}
.btn:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}

.sec-head{text-align:center;margin-bottom:46px}
.sec-badge{display:inline-block;font-size:13px;font-weight:600;color:var(--primary);background:var(--primary-soft);padding:5px 16px;border-radius:999px;margin-bottom:14px}
.sec-head h2{font-size:32px;font-weight:800;color:var(--dark);letter-spacing:.5px}
.sec-head p{margin-top:10px;font-size:15px;color:var(--text-sub)}

.hero{padding:calc(var(--nav-h) + 64px) 0 70px;background:linear-gradient(180deg,var(--primary-soft) 0%,var(--bg) 78%)}
.hero-inner{display:flex;align-items:center;gap:60px}
.hero-text{flex:1 1 auto}
.hero-badge{display:inline-block;font-size:13px;font-weight:600;color:var(--primary);background:var(--card);border:1px solid var(--primary);padding:5px 14px;border-radius:999px;margin-bottom:18px}
.hero-text h1{font-size:44px;font-weight:800;color:var(--dark);line-height:1.25;letter-spacing:1px}
.hero-text h1 em{font-style:normal;color:var(--primary)}
.hero-desc{margin:20px 0 30px;font-size:16px;color:var(--text-sub);max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-img{flex:0 0 300px}
.hero-img img{width:100%;height:auto;border-radius:24px;box-shadow:0 20px 48px rgba(32,32,42,.18)}

.preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.preview-grid img{width:100%;height:auto;border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
.preview-grid img:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.preview-title{margin-top:12px;font-size:15px;font-weight:700;color:var(--dark);text-align:center}

.intro-card{display:flex;gap:36px;align-items:flex-start;background:var(--card);border:1px solid var(--border);border-radius:20px;padding:44px;box-shadow:var(--shadow)}
.intro-ico{flex:0 0 64px;height:64px;border-radius:18px;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:30px;font-weight:800;display:flex;align-items:center;justify-content:center}
.intro-body h3{font-size:21px;font-weight:800;color:var(--dark)}
.intro-body p{margin-top:12px;font-size:15px;color:var(--text-sub)}
.intro-points{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.intro-points li{font-size:14px;font-weight:600;color:var(--primary);background:var(--primary-soft);padding:8px 16px;border-radius:999px}

.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;transition:transform .3s ease,box-shadow .3s ease}
.feature-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.feature-ico{width:54px;height:54px;border-radius:16px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feature-ico svg{width:26px;height:26px}
.feature-card h3{font-size:17px;font-weight:700;color:var(--dark)}
.feature-card p{margin-top:8px;font-size:14px;color:var(--text-sub)}

.compare-box{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden}
.compare-scroll{overflow-x:auto}
.compare-table{width:100%;min-width:680px;border-collapse:collapse;table-layout:fixed;white-space:nowrap}
.compare-table th,.compare-table td{padding:16px 20px;text-align:center;font-size:14px}
.compare-table thead th{background:var(--dark);color:#fff;font-weight:700;font-size:15px}
.compare-table thead th:nth-child(2){background:linear-gradient(135deg,var(--primary),var(--primary-deep))}
.compare-table tbody td{border-top:1px solid var(--border);color:var(--text)}
.compare-table tbody td:first-child{text-align:left;color:var(--text-sub);font-weight:600}
.compare-table tbody td:nth-child(2){color:var(--primary);font-weight:600}
.compare-table tbody tr:hover td{background:var(--primary-soft)}
.compare-hint{display:none;text-align:center;font-size:14px;color:var(--text-sub);margin-top:12px}

.stat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:30px 20px;text-align:center;transition:transform .3s ease,box-shadow .3s ease}
.stat-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.stat-num{font-size:38px;font-weight:800;color:var(--primary);line-height:1.2}
.stat-label{margin-top:8px;font-size:14px;color:var(--text-sub)}

.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .3s ease,box-shadow .3s ease}
.review-card:hover{transform:translateY(-8px);box-shadow:var(--shadow-hover)}
.review-top{display:flex;align-items:center;gap:14px}
.review-avatar{flex:0 0 46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:20px;font-weight:700;display:flex;align-items:center;justify-content:center}
.review-user .name{font-size:15px;font-weight:700;color:var(--dark)}
.review-user .stars{color:#FFB400;font-size:13px;letter-spacing:3px;margin-top:2px}
.review-text{margin-top:14px;font-size:14px;color:var(--text-sub);line-height:1.7}

.ver-card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:36px;max-width:720px;margin:0 auto;box-shadow:var(--shadow)}
.ver-head{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;border-bottom:1px dashed var(--border);padding-bottom:16px}
.ver-no{font-size:22px;font-weight:800;color:var(--dark)}
.ver-no em{font-style:normal;color:var(--primary)}
.ver-date{font-size:14px;color:var(--text-sub)}
.ver-list{margin-top:16px}
.ver-list li{display:flex;align-items:flex-start;gap:10px;padding:11px 0;font-size:14px;border-bottom:1px solid var(--border)}
.ver-list li:last-child{border-bottom:none}
.ver-tag{flex:0 0 auto;font-size:12px;font-weight:600;padding:2px 9px;border-radius:6px;margin-top:2px}
.t-new{color:var(--primary);background:var(--primary-soft)}
.t-opt{color:#2563EB;background:#EAF1FF}
.t-fix{color:#16A34A;background:#E7F7EE}

.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:14px;margin-bottom:12px;overflow:hidden;transition:box-shadow .25s ease}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:12px;background:none;border:none;padding:16px 20px;font-size:15px;font-weight:600;color:var(--dark);cursor:pointer;text-align:left}
.faq-q .ico{flex:0 0 22px;height:22px;border-radius:50%;background:var(--primary-soft);color:var(--primary);font-size:15px;font-weight:700;line-height:22px;text-align:center;transition:transform .3s ease}
.faq-item.open .ico{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease}
.faq-a-inner{padding:0 20px 18px;font-size:14px;color:var(--text-sub)}

.download{padding:76px 0 84px;background:linear-gradient(180deg,var(--primary-soft) 0%,var(--bg) 80%);text-align:center}
.download h1{font-size:34px;font-weight:800;color:var(--dark);letter-spacing:1px}
.download h1 em{font-style:normal;color:var(--primary)}
.dl-meta{display:flex;justify-content:center;gap:10px;margin:14px 0 30px;font-size:14px;color:var(--text-sub)}
.dl-btns{display:flex;justify-content:center;gap:18px}
.dl-btns .btn{min-width:250px}
.dl-tip{margin-top:28px;font-size:15px;color:var(--text-sub)}

.footer{background:var(--dark);padding:30px 0;text-align:center}
.footer p{font-size:14px;color:#9A9AA8}
.footer a{color:#fff;transition:color .2s}
.footer a:hover{color:var(--primary)}

.to-top{position:fixed;right:22px;bottom:26px;z-index:90;width:44px;height:44px;border:none;border-radius:50%;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;font-size:20px;cursor:pointer;box-shadow:0 6px 18px rgba(255,106,0,.35);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s ease,transform .3s ease,visibility .3s ease}
.to-top.show{opacity:1;visibility:visible;transform:translateY(0)}

@media (max-width:1024px){
  .nav-links{gap:13px}
  .nav-links a{font-size:13px}
  .preview-grid{grid-template-columns:repeat(2,1fr)}
  .feature-grid{grid-template-columns:repeat(2,1fr)}
  .stat-grid{grid-template-columns:repeat(2,1fr)}
  .review-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:768px){
  .container{padding:0 20px}
  .nav-links{display:none}
  section{padding:56px 0}
  .sec-head{margin-bottom:34px}
  .sec-head h2{font-size:26px}
  .hero{padding:calc(var(--nav-h) + 28px) 0 48px}
  .hero-inner{flex-direction:column;gap:30px}
  .hero-text{text-align:center}
  .hero-text h1{font-size:30px}
  .hero-desc{margin:16px auto 24px;max-width:none}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .hero-img{flex:none;width:100%}
  .preview-grid{grid-template-columns:1fr}
  .intro-card{flex-direction:column;padding:28px 24px}
  .feature-grid{grid-template-columns:1fr}
  .stat-num{font-size:30px}
  .review-grid{grid-template-columns:1fr}
  .compare-hint{display:block}
  .ver-card{padding:28px 22px}
  .ver-head{flex-direction:column;align-items:flex-start}
  .download{padding:56px 0 64px}
  .download h1{font-size:28px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;width:100%}
  .dl-btns .btn{width:100%}
  .to-top{right:16px;bottom:20px;width:40px;height:40px}
}