:root{
  --primary:#ff5c8a;
  --primary-deep:#e8437a;
  --primary-light:#ffb3cc;
  --bg:#fff6f9;
  --bg-alt:#fff0f5;
  --card:#ffffff;
  --dark:#2e2430;
  --dark-soft:#45354a;
  --border:#ffe1ec;
  --text:#352c34;
  --text-sub:#7c6e79;
  --radius:16px;
  --shadow:0 6px 18px rgba(255,92,138,.10);
  --shadow-hover:0 14px 32px rgba(255,92,138,.20);
  --nav-h:68px;
  --star:#ffb400;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:16px;-webkit-font-smoothing:antialiased}
img{display:block;width:100%;height:auto;background:#fdeef4}
a{text-decoration:none;color:inherit}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 20px}
main section[id]{scroll-margin-top:calc(var(--nav-h) + 12px)}

.nav{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,246,249,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 6px 18px rgba(255,92,138,.10)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 20px;height:var(--nav-h);display:flex;align-items:center;gap:26px}
.logo{display:flex;align-items:center;gap:8px;font-size:20px;font-weight:800;color:var(--primary-deep);white-space:nowrap;line-height:1}
.logo svg{flex-shrink:0}
.nav-links{display:flex;align-items:center;gap:20px;margin-left:auto}
.nav-links a{position:relative;font-size:14px;color:var(--text-sub);padding:6px 2px;transition:color .25s}
.nav-links a:hover,.nav-links a.active{color:var(--primary-deep)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;border-radius:2px;background:var(--primary)}
.btn-nav{padding:6px 16px;border-radius:999px;background:linear-gradient(135deg,#ff8fb3,var(--primary));color:#fff;font-size:13px;font-weight:600;transition:transform .25s,box-shadow .25s;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:999px;font-weight:600;cursor:pointer;transition:transform .25s,box-shadow .25s}
.btn:hover,.btn-nav:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-primary{background:linear-gradient(135deg,#ff8fb3,var(--primary));color:#fff;padding:14px 34px;font-size:16px}
.btn-ios{background:#fff;color:var(--primary-deep);padding:12px 34px;font-size:16px;border:2px solid var(--primary-light)}

.hero{padding:calc(var(--nav-h) + 64px) 0 84px;background:radial-gradient(1100px 480px at 82% -8%,rgba(255,179,204,.35),transparent 62%),var(--bg)}
.hero-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.hero h1{font-size:42px;line-height:1.35;font-weight:800;color:var(--dark);margin-bottom:22px}
.ver{display:inline-block;vertical-align:middle;margin-left:10px;padding:4px 14px;border-radius:999px;background:linear-gradient(135deg,#ff8fb3,var(--primary));color:#fff;font-size:15px;font-weight:700;letter-spacing:.5px;white-space:nowrap}
.hero-desc{font-size:16px;color:var(--text-sub);max-width:540px;margin-bottom:34px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-img{display:flex;justify-content:center}
.hero-img img{width:100%;max-width:420px;border-radius:var(--radius);box-shadow:var(--shadow-hover)}

.section{padding:84px 0}
.section-alt{background:var(--bg-alt)}
.section-title{font-size:32px;font-weight:800;color:var(--dark);text-align:center;margin-bottom:12px}
.section-sub{font-size:15px;color:var(--text-sub);text-align:center;margin-bottom:48px}

.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.work:hover,.feature:hover,.review:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

.intro-inner{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
.intro-text .section-title{text-align:left;margin-bottom:16px}
.intro-text p{font-size:15px;color:var(--text-sub);margin-bottom:14px}
.intro-points{margin-top:18px}
.intro-points li{position:relative;padding-left:28px;font-size:15px;margin-bottom:12px}
.intro-points li::before{content:"✓";position:absolute;left:0;top:1px;width:18px;height:18px;border-radius:50%;background:var(--primary-light);color:var(--primary-deep);font-size:12px;font-weight:700;text-align:center;line-height:18px}
.intro-visual{background:linear-gradient(150deg,#ffe3ee,#fff 70%);border:1px solid var(--border);border-radius:24px;padding:38px 34px;box-shadow:var(--shadow)}
.intro-badge{display:inline-block;padding:4px 14px;border-radius:999px;background:linear-gradient(135deg,#ff8fb3,var(--primary));color:#fff;font-size:13px;font-weight:600;margin-bottom:16px}
.intro-visual h3{font-size:22px;font-weight:700;color:var(--dark);margin-bottom:10px}
.intro-visual p{font-size:14px;color:var(--text-sub);margin-bottom:22px}
.intro-chips{display:flex;flex-wrap:wrap;gap:10px}
.intro-chips span{padding:6px 14px;border-radius:999px;background:#fff;border:1px solid var(--border);color:var(--primary-deep);font-size:13px;font-weight:600}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:32px 26px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.feature svg{width:40px;height:40px;color:var(--primary);stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round}
.feature h3{font-size:18px;font-weight:700;color:var(--dark);margin:16px 0 8px}
.feature p{font-size:14px;color:var(--text-sub)}

.compare-grid{display:grid;grid-template-columns:.9fr 1.1fr 1.1fr;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.compare-grid>div{padding:16px 18px;border-bottom:1px solid var(--border);font-size:14px;line-height:1.6}
.compare-grid>.dim{background:var(--bg-alt);font-weight:600}
.compare-grid>.compare-me{background:rgba(255,92,138,.06);color:var(--primary-deep);font-weight:600}
.compare-grid>.compare-head{background:var(--dark);color:#fff;font-weight:700}
.compare-grid>.compare-head.compare-me{background:linear-gradient(135deg,#ff8fb3,var(--primary));color:#fff}
.compare-grid>div:nth-last-child(-n+3){border-bottom:none}

.section-dark{background:linear-gradient(160deg,var(--dark),var(--dark-soft))}
.section-dark .section-title{color:#fff}
.section-dark .section-sub{color:rgba(255,255,255,.62)}
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.stat{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.14);border-radius:var(--radius);padding:34px 18px;text-align:center;transition:transform .3s,box-shadow .3s}
.stat:hover{transform:translateY(-6px);box-shadow:0 16px 34px rgba(0,0,0,.28)}
.stat .num{display:block;font-size:38px;font-weight:800;line-height:1.2;background:linear-gradient(135deg,#ffd9e6,#ff8fb3);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat .label{display:block;margin-top:8px;font-size:14px;color:rgba(255,255,255,.72)}

.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.review-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,#ffb3cc,var(--primary));color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.review-meta{display:flex;flex-direction:column;line-height:1.4}
.name{font-size:15px;font-weight:700;color:var(--dark)}
.stars{color:var(--star);font-size:12px;letter-spacing:2px;margin-top:2px}
.review-text{font-size:14px;color:var(--text-sub)}

.version-card{max-width:780px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.version-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;padding-bottom:20px;margin-bottom:22px;border-bottom:1px solid var(--border)}
.version-badge{display:inline-block;padding:6px 18px;border-radius:999px;background:linear-gradient(135deg,#ff8fb3,var(--primary));color:#fff;font-size:15px;font-weight:800}
.version-date{font-size:14px;color:var(--text-sub)}
.version-log li{position:relative;padding-left:24px;margin-bottom:13px;font-size:15px}
.version-log li:last-child{margin-bottom:0}
.version-log li::before{content:"";position:absolute;left:2px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--primary)}

.faq-list{max-width:780px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:14px;overflow:hidden;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:16px;padding:18px 22px;background:none;border:none;cursor:pointer;text-align:left;font-size:15px;font-weight:600;color:var(--dark)}
.faq-icon{position:relative;width:20px;height:20px;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:3px;right:3px;top:9px;height:2px}
.faq-icon::after{top:3px;bottom:3px;left:9px;width:2px}
.faq-item.active .faq-icon::after{transform:scaleY(0)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 20px;font-size:14px;color:var(--text-sub)}

.section-download{background:radial-gradient(900px 420px at 50% -12%,rgba(255,179,204,.38),transparent 60%),var(--bg-alt);text-align:center}
.download-inner{padding:8px 20px}
.download-inner h1{font-size:40px;font-weight:800;color:var(--dark);margin-bottom:14px}
.download-meta{display:flex;justify-content:center;gap:22px;font-size:14px;color:var(--text-sub);margin-bottom:34px}
.download-btns{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}
.download-tip{margin-top:26px;font-size:15px;font-weight:500;color:var(--primary-deep)}

.footer{padding:30px 0;background:var(--dark);color:rgba(255,255,255,.6);font-size:14px;text-align:center}
.footer-link{color:#fff;transition:color .25s}
.footer-link:hover{color:var(--primary-light)}

.back-top{position:fixed;right:24px;bottom:24px;z-index:99;width:46px;height:46px;border:none;border-radius:50%;background:linear-gradient(135deg,#ff8fb3,var(--primary));color:#fff;font-size:20px;cursor:pointer;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}

@media (max-width:992px){
  .nav-links{display:none}
  .btn-nav{margin-left:auto}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid{grid-template-columns:repeat(2,1fr)}
  .reviews-grid{grid-template-columns:repeat(2,1fr)}
  .hero-inner,.intro-inner{grid-template-columns:1fr;gap:36px}
  .hero-img img{max-width:340px}
}

@media (max-width:768px){
  .logo{font-size:18px}
  .section{padding:56px 0}
  .section-title{font-size:26px}
  .section-sub{margin-bottom:32px}
  .hero{padding:calc(var(--nav-h) + 36px) 0 56px}
  .hero h1{font-size:28px}
  .hero-desc{font-size:15px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn,.download-btns .btn{padding:13px 0;width:100%}
  .hero-img img{max-width:100%}
  .works-grid{grid-template-columns:1fr;gap:20px}
  .features-grid{grid-template-columns:1fr;gap:16px}
  .stats-grid{grid-template-columns:1fr 1fr;gap:14px}
  .stat{padding:24px 12px}
  .stat .num{font-size:28px}
  .reviews-grid{grid-template-columns:1fr;gap:16px}
  .compare-grid>div{padding:12px 10px;font-size:12px}
  .version-card{padding:24px 20px}
  .download-inner h1{font-size:26px}
  .download-meta{font-size:12px;gap:14px;white-space:nowrap;margin-bottom:26px}
  .download-btns{flex-direction:column;width:100%}
  .back-top{right:16px;bottom:16px;width:42px;height:42px}
}