:root{
  --primary:#2F7BFF;
  --primary-dark:#1E5FD6;
  --dark:#10233F;
  --border:#E3EAF4;
  --bg:#F6F9FD;
  --card:#FFFFFF;
  --text:#16243A;
  --text-2:#57677E;
  --radius:14px;
  --shadow:0 6px 20px rgba(16,35,63,.08);
  --shadow-hover:0 14px 32px rgba(47,123,255,.16);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei","Hiragino Sans GB","Helvetica Neue",Helvetica,Arial,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;font-size:16px}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
button{cursor:pointer}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.btn{display:inline-block;padding:11px 24px;border-radius:999px;background:var(--primary);color:#fff;font-size:15px;font-weight:600;line-height:1.4;text-align:center;border:none;transition:background .2s,transform .2s,box-shadow .2s}
.btn:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 10px 22px rgba(47,123,255,.3)}
.btn-outline{background:transparent;border:1.5px solid var(--primary);color:var(--primary)}
.btn-outline:hover{background:var(--primary);color:#fff}
.section{padding:76px 0}
.section-white{background:#fff}
.sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.sec-head h2{font-size:30px;font-weight:800;color:var(--dark);letter-spacing:.5px}
.sec-head p{margin-top:10px;font-size:15px;color:var(--text-2)}

.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.94);backdrop-filter:blur(8px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;height:64px}
.logo{display:flex;align-items:center;gap:8px;font-size:19px;font-weight:800;color:var(--dark);white-space:nowrap}
.logo svg{flex:none}
.logo b{color:var(--primary)}
.nav-menu{display:flex;align-items:center;gap:16px;margin-left:auto;padding:0 16px}
.nav-menu a{font-size:14px;color:var(--text-2);white-space:nowrap;transition:color .2s}
.nav-menu a:hover{color:var(--primary)}
.nav-menu a.active{color:var(--primary);font-weight:700}
.nav-dl{font-size:13px;padding:8px 18px;flex:none}

.hero{background:linear-gradient(180deg,#EAF2FF 0%,var(--bg) 100%)}
.hero-inner{display:flex;align-items:center;gap:56px;padding:72px 0 84px}
.hero-text{flex:1;min-width:0}
.hero-tag{display:inline-flex;padding:5px 14px;border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--primary);font-size:13px;font-weight:600;margin-bottom:18px}
.hero h1{font-size:44px;font-weight:800;color:var(--dark);line-height:1.25;letter-spacing:1px}
.hero h1 span{color:var(--primary)}
.hero p{margin:18px 0 30px;font-size:16px;color:var(--text-2);max-width:560px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-img{flex:0 0 330px}
.hero-img img{width:100%;height:auto;border-radius:20px;box-shadow:var(--shadow)}

.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 .25s,box-shadow .25s}
.work-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.work-card img{width:100%;height:auto}
.work-card p{padding:12px 14px;font-size:14px;color:var(--text-2);text-align:center}

.intro-inner{display:flex;gap:48px;align-items:flex-start}
.intro-text{flex:1.2;min-width:0}
.intro-text h2{font-size:30px;font-weight:800;color:var(--dark);margin-bottom:18px}
.intro-text p{font-size:15.5px;color:var(--text-2);margin-bottom:14px}
.intro-pills{display:flex;flex-wrap:wrap;gap:12px;margin-top:22px}
.pill{display:inline-flex;padding:8px 16px;border-radius:999px;background:#EEF5FF;color:var(--primary);font-size:14px;font-weight:600}
.intro-card{flex:0.8;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.intro-card li{display:flex;gap:12px;align-items:flex-start;padding:12px 0;border-bottom:1px dashed var(--border);font-size:14.5px;color:var(--text)}
.intro-card li:last-child{border-bottom:none}
.intro-card svg{flex:none;margin-top:3px}

.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;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.feature-icon{width:50px;height:50px;border-radius:14px;background:#EEF5FF;display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.feature-card h3{font-size:17px;font-weight:700;color:var(--dark);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-2)}

.compare-wrap{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow-x:auto;box-shadow:var(--shadow)}
.compare-table{width:100%;table-layout:fixed;border-collapse:collapse;min-width:0}
.compare-table col.c1{width:24%}
.compare-table col.c2{width:40%}
.compare-table col.c3{width:36%}
.compare-table th,.compare-table td{padding:15px 16px;text-align:center;font-size:14px;border-bottom:1px solid var(--border);white-space:nowrap}
.compare-table th{background:#F0F6FF;color:var(--dark);font-weight:700}
.compare-table td:first-child{text-align:left;color:var(--text-2);white-space:normal}
.compare-table tr:last-child td{border-bottom:none}
.col-self{background:#F0F6FF;color:var(--text);font-weight:700}
.compare-hint{display:none;text-align:center;font-size:13px;color:var(--text-2);margin-top:12px}

.stats{background:linear-gradient(160deg,#142B4E 0%,var(--dark) 100%);color:#fff}
.stats .sec-head h2{color:#fff}
.stats .sec-head p{color:#B9C9E2}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;text-align:center}
.stat-num{font-size:42px;font-weight:800;color:#7FB0FF;line-height:1.2;letter-spacing:.5px}
.stat-num em{font-style:normal;font-size:20px;margin-left:2px}
.stat-label{margin-top:8px;font-size:15px;color:#B9C9E2}

.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 .25s,box-shadow .25s}
.review-card:hover{transform:translateY(-5px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#5BA0FF,#2F7BFF);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex:none}
.review-name{font-size:15px;font-weight:700;color:var(--dark)}
.stars{color:#F5A623;font-size:13px;letter-spacing:2px;margin-top:2px}
.review-text{font-size:14px;color:var(--text-2)}

.version-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);display:flex;gap:44px;padding:36px;box-shadow:var(--shadow)}
.version-left{flex:0 0 300px}
.version-badge{display:inline-flex;padding:5px 14px;border-radius:999px;background:#EEF5FF;color:var(--primary);font-size:13px;font-weight:700;margin-bottom:14px}
.version-num{font-size:38px;font-weight:800;color:var(--dark);line-height:1.2}
.version-num span{color:var(--primary)}
.version-date{margin-top:10px;font-size:14px;color:var(--text-2)}
.version-date b{color:var(--text);font-weight:600}
.version-right{flex:1;min-width:0}
.version-right h3{font-size:17px;font-weight:700;color:var(--dark);margin-bottom:14px}
.version-right li{display:flex;gap:10px;padding:9px 0;font-size:14.5px;color:var(--text-2);border-bottom:1px dashed var(--border)}
.version-right li:last-child{border-bottom:none}
.version-right li svg{flex:none;margin-top:4px}

.faq-item{border:1px solid var(--border);border-radius:var(--radius);background:var(--card);margin-bottom:12px;overflow:hidden;transition:box-shadow .2s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;padding:17px 20px;background:none;border:none;font-size:15.5px;font-weight:600;color:var(--dark);text-align:left;font-family:inherit}
.faq-plus{position:relative;width:18px;height:18px;flex:none}
.faq-plus::before,.faq-plus::after{content:"";position:absolute;background:var(--primary);border-radius:2px;transition:transform .25s}
.faq-plus::before{left:0;top:8px;width:18px;height:2px}
.faq-plus::after{left:8px;top:0;width:2px;height:18px}
.faq-item.open .faq-plus::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .3s ease;font-size:14px;color:var(--text-2)}
.faq-item.open .faq-a{max-height:260px;padding:0 20px 18px}

.download{background:linear-gradient(160deg,#1B3C78 0%,var(--dark) 100%);color:#fff;text-align:center}
.download h1{font-size:36px;font-weight:800;letter-spacing:1px;margin-bottom:6px}
.download h1 span{color:#7FB0FF}
.dl-meta{font-size:14px;color:#A9BBD6;margin-bottom:34px}
.dl-btns{display:flex;gap:16px;justify-content:center;margin-bottom:28px}
.dl-btn{min-width:250px;padding:14px 32px;font-size:16px}
.dl-btn.dl-ios{background:#fff;color:var(--dark)}
.dl-btn.dl-ios:hover{background:#EAF2FF;transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,255,255,.25)}
.dl-tip{font-size:14px;color:#A9BBD6}

.footer{background:#0B1C33;color:#8FA3C0;text-align:center;padding:30px 20px;font-size:14px}
.footer a{color:#D5E1F2}
.footer a:hover{color:#fff}
.footer p{margin-top:6px;font-size:13px;color:#5F7698}

#toTop{position:fixed;right:24px;bottom:32px;width:44px;height:44px;border-radius:50%;border:none;background:var(--primary);color:#fff;display:none;align-items:center;justify-content:center;box-shadow:0 8px 20px rgba(47,123,255,.4);z-index:99;transition:background .2s,transform .2s}
#toTop:hover{background:var(--primary-dark);transform:translateY(-3px)}
#toTop.show{display:flex}

@media (max-width:900px){
  .nav-menu{gap:11px;padding:0 10px}
  .nav-menu a{font-size:13px}
  .hero h1{font-size:36px}
  .hero-img{flex-basis:280px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr);row-gap:34px}
  .intro-inner{flex-direction:column}
  .intro-card{width:100%}
  .version-left{flex-basis:240px}
}
@media (max-width:640px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:24px}
  .nav-inner{justify-content:space-between}
  .nav-menu{display:none}
  .nav-dl{padding:8px 16px}
  .hero-inner{flex-direction:column;gap:30px;padding:44px 0 56px;text-align:center}
  .hero h1{font-size:30px}
  .hero p{margin:14px auto 24px;font-size:15px}
  .hero-btns{width:100%;flex-direction:column}
  .hero-btns .btn{width:100%}
  .hero-img{flex:none;width:100%;max-width:320px;margin:0 auto}
  .works-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:14px;row-gap:30px}
  .stat-num{font-size:32px}
  .compare-table{width:max-content;min-width:520px}
  .compare-table td,.compare-table th{white-space:nowrap}
  .compare-hint{display:block}
  .version-card{flex-direction:column;padding:26px;gap:24px}
  .version-left{flex-basis:auto}
  .version-num{font-size:32px}
  .download h1{font-size:28px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;width:100%}
  .dl-btn{width:100%;min-width:0}
  #toTop{right:16px;bottom:20px;width:40px;height:40px}
}