:root{
  --primary:#2E6BE6;
  --primary-dark:#1D4FC4;
  --primary-soft:#EAF1FD;
  --dark:#10233F;
  --text:#26374E;
  --text-sub:#5C6B82;
  --border:#E3E9F2;
  --bg:#F5F8FD;
  --card:#FFFFFF;
  --gold:#F6A723;
  --radius:16px;
  --shadow-hover:0 18px 40px rgba(20,40,90,.13);
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:78px}
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{display:block;width:100%;height:auto}
a{text-decoration:none;color:inherit}
ul{list-style:none}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section{padding:84px 0}
h2{font-size:32px;font-weight:800;color:var(--dark);text-align:center}
.sec-sub{text-align:center;color:var(--text-sub);margin:12px 0 46px;font-size:15px}

.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between;gap:16px}
.logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:700;color:var(--dark);white-space:nowrap}
.logo svg{width:26px;height:26px;flex-shrink:0}
.logo b{color:var(--primary)}
.nav-links{display:flex;align-items:center;gap:2px}
.nav-links a{padding:7px 11px;font-size:14px;color:var(--text-sub);border-radius:8px;white-space:nowrap;transition:background .2s,color .2s}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:var(--primary-soft)}
.nav-btn{display:inline-block;padding:5px 14px;font-size:13px;font-weight:600;color:#fff;background:var(--primary);border-radius:999px;white-space:nowrap;box-shadow:0 4px 12px rgba(46,107,230,.25);transition:background .2s,transform .2s}
.nav-btn:hover{background:var(--primary-dark)}

.hero{background:linear-gradient(180deg,#E8F0FE 0%,var(--bg) 100%);padding:76px 0 84px}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero h1{font-size:44px;line-height:1.25;font-weight:800;color:var(--dark)}
.hero-desc{margin:20px 0 34px;font-size:17px;color:var(--text-sub);max-width:540px}
.hero-btns,.dl-btns{display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 30px;border-radius:999px;font-size:16px;font-weight:600;cursor:pointer;transition:transform .25s,box-shadow .25s,background .25s}
.btn-primary{background:linear-gradient(135deg,#2E6BE6,#4F8DF2);color:#fff;box-shadow:0 10px 24px rgba(46,107,230,.3)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(46,107,230,.4)}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn-ghost:hover{background:var(--primary-soft);transform:translateY(-2px)}
.hero-img{max-width:340px;justify-self:end}
.hero-img img{border-radius:var(--radius);box-shadow:var(--shadow-hover)}

.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.work-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:transform .3s,box-shadow .3s}
.work-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}

.intro-text{max-width:860px;margin:0 auto;font-size:16px;color:var(--text-sub)}
.intro-text p+p{margin-top:16px}
.intro-points{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:44px}
.intro-point{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 24px;transition:transform .3s,box-shadow .3s}
.intro-point:hover{transform:translateY(-4px);box-shadow:var(--shadow-hover)}
.intro-point h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.intro-point p{font-size:14px;color:var(--text-sub)}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 24px;transition:transform .3s,box-shadow .3s}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.feature-icon{width:46px;height:46px;border-radius:12px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feature-icon svg{width:24px;height:24px}
.feature-card h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-sub)}

.compare-scroll{overflow-x:auto;-webkit-overflow-scrolling:touch;border:1px solid var(--border);border-radius:var(--radius);background:var(--card)}
.compare-table{width:100%;min-width:640px;border-collapse:collapse;white-space:nowrap}
.compare-table th,.compare-table td{padding:15px 22px;text-align:left;font-size:15px;border-bottom:1px solid var(--border)}
.compare-table thead th{background:var(--dark);color:#fff;font-weight:600}
.compare-table th:nth-child(2){background:var(--primary)}
.compare-table td:nth-child(2){background:var(--primary-soft);color:var(--primary-dark);font-weight:600}
.compare-table tbody tr:last-child td{border-bottom:none}
.compare-tip{display:none;text-align:center;color:var(--text-sub);font-size:13px;margin-top:12px}

.data-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.data-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px 20px;text-align:center;transition:transform .3s,box-shadow .3s}
.data-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.data-num{font-size:38px;font-weight:800;color:var(--primary);line-height:1.2}
.data-label{margin-top:8px;font-size:14px;color:var(--text-sub)}

.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .3s,box-shadow .3s}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:44px;height:44px;border-radius:50%;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;color:#fff;background:linear-gradient(135deg,#2E6BE6,#5B9BFF)}
.review-card:nth-child(2) .avatar{background:linear-gradient(135deg,#128C7E,#4FC9BA)}
.review-card:nth-child(3) .avatar{background:linear-gradient(135deg,#E8794C,#F5BE98)}
.review-card:nth-child(4) .avatar{background:linear-gradient(135deg,#785ADC,#B7A1F4)}
.review-card:nth-child(5) .avatar{background:linear-gradient(135deg,#2E9E6B,#6FCFA3)}
.review-card:nth-child(6) .avatar{background:linear-gradient(135deg,#E9A838,#FAD589)}
.review-name{font-size:15px;font-weight:600;color:var(--dark)}
.stars{color:var(--gold);font-size:13px;letter-spacing:2px;margin-top:2px}
.review-text{font-size:14px;color:var(--text-sub)}

.update-card{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:34px}
.update-head{border-bottom:1px solid var(--border);padding-bottom:20px;margin-bottom:10px}
.update-ver{font-size:26px;font-weight:800;color:var(--dark)}
.update-date{font-size:14px;color:var(--text-sub);margin-top:6px}
.update-list li{padding:12px 0 12px 26px;position:relative;font-size:15px;color:var(--text);border-bottom:1px dashed var(--border)}
.update-list li:last-child{border-bottom:none}
.update-list li::before{content:"";position:absolute;left:2px;top:20px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:760px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;overflow:hidden;transition:border-color .3s}
.faq-item:hover{border-color:#C6D6F2}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:18px 22px;font-size:16px;font-weight:600;color:var(--dark);cursor:pointer;user-select:none}
.faq-icon{width:24px;height:24px;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:16px;font-weight:700;flex-shrink:0;transition:transform .3s}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 20px;font-size:15px;color:var(--text-sub)}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-item.open .faq-a{max-height:320px}

.download-card{max-width:760px;margin:0 auto;text-align:center;background:linear-gradient(180deg,#E8F0FE 0%,var(--card) 100%);border:1px solid var(--border);border-radius:24px;padding:56px 40px}
.download-card h1{font-size:34px;font-weight:800;color:var(--dark)}
.dl-meta{margin:14px 0 30px;font-size:14px;color:var(--text-sub)}
.dl-btns{justify-content:center}
.dl-tip{margin-top:26px;font-size:14px;color:var(--text-sub)}

.footer{background:var(--dark);color:#A7B4C8;padding:38px 0;text-align:center;font-size:14px}
.footer-link{color:#fff}

#backTop{position:fixed;right:24px;bottom:24px;z-index:99;width:44px;height:44px;border:none;border-radius:50%;background:var(--primary);color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(46,107,230,.35);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s,transform .3s,visibility .3s}
#backTop.show{opacity:1;visibility:visible;transform:none}
#backTop svg{width:20px;height:20px}

@media (max-width:1024px){
  .hero-inner{gap:40px}
  .hero h1{font-size:36px}
  .nav-links a{padding:6px 8px;font-size:13px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .data-grid{grid-template-columns:repeat(2,1fr)}
}

@media (max-width:768px){
  .container{padding:0 20px}
  .nav-inner{padding:0 20px}
  .nav-links{display:none}
  section{padding:56px 0}
  h2{font-size:26px}
  .sec-sub{margin-bottom:32px;font-size:14px}
  .hero{padding:40px 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:30px}
  .hero-text{text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto;font-size:15px}
  .hero-btns,.dl-btns{flex-direction:column;width:100%}
  .hero-btns .btn,.dl-btns .btn{width:100%}
  .hero-img{max-width:100%;justify-self:center}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .intro-text{font-size:15px}
  .intro-points{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .compare-tip{display:block}
  .data-grid{gap:14px}
  .data-num{font-size:30px}
  .reviews-grid{grid-template-columns:1fr}
  .update-card{padding:26px 20px}
  .download-card{padding:40px 20px}
  .download-card h1{font-size:26px}
  .dl-meta{font-size:12px}
  #backTop{right:16px;bottom:16px}
}