:root{
  --primary:#ff4655;
  --primary-deep:#e73340;
  --primary-soft:#fff0f1;
  --dark:#1b1e28;
  --bg:#f6f7fa;
  --card:#ffffff;
  --border:#e7e9f0;
  --text:#242834;
  --text-sub:#5c6472;
  --radius:14px;
  --radius-lg:20px;
  --shadow:0 4px 16px rgba(27,30,40,.06);
  --shadow-hover:0 12px 28px rgba(27,30,40,.14);
  --header-h:64px;
  --star:#ffb400;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:var(--header-h)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.7;font-size:15px;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{color:inherit}
button{font-family:inherit}
.container{max-width:1160px;margin:0 auto;padding:0 24px}

.header{position:fixed;top:0;left:0;right:0;z-index:100;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.header.scrolled{box-shadow:0 4px 18px rgba(27,30,40,.08)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:var(--header-h)}
.logo{text-decoration:none;color:var(--primary);font-size:20px;font-weight:800;line-height:1}
.nav{display:flex;gap:20px}
.nav a{font-size:14px;color:var(--text-sub);text-decoration:none;font-weight:500;white-space:nowrap;transition:color .2s}
.nav a:hover,.nav a.active{color:var(--primary)}
.btn{display:inline-flex;align-items:center;justify-content:center;text-decoration:none;border-radius:999px;font-weight:600;transition:transform .25s,box-shadow .25s,background .25s}
.btn-primary,.btn-dark{color:#fff;font-size:15px;padding:12px 30px}
.btn-primary{background:var(--primary)}
.btn-primary:hover{background:var(--primary-deep);transform:translateY(-2px);box-shadow:0 10px 22px rgba(255,70,85,.32)}
.btn-dark{background:var(--dark)}
.btn-dark:hover{transform:translateY(-2px);box-shadow:0 10px 22px rgba(27,30,40,.25)}
.nav-btn{font-size:13px;padding:7px 16px;background:var(--primary);color:#fff}
.nav-btn:hover{background:var(--primary-deep);transform:none;box-shadow:none}

.hero{padding:calc(var(--header-h) + 56px) 0 72px;background:linear-gradient(180deg,#fff,var(--bg));position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:-120px;right:-80px;width:520px;height:520px;border-radius:50%;background:radial-gradient(circle,rgba(255,70,85,.1),transparent 65%);pointer-events:none}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center;position:relative}
.hero h1{font-size:40px;line-height:1.32;font-weight:800}
.hero h1 .ver{color:var(--primary);font-size:24px;font-weight:800;margin-left:4px}
.hero-desc{margin-top:20px;color:var(--text-sub);font-size:16px}
.hero-btns{display:flex;gap:16px;margin-top:32px;flex-wrap:wrap}
.hero-img img{width:100%;height:auto;border-radius:var(--radius-lg);box-shadow:0 18px 44px rgba(27,30,40,.16);background:#eef0f4}

.section{padding:76px 0}
.section-alt{background:#fff}
.section-title{font-size:30px;font-weight:800;text-align:center}
.section-sub{text-align:center;color:var(--text-sub);margin-top:10px;margin-bottom:44px}
.section-title.light{color:#fff}
.section-sub.light{color:rgba(255,255,255,.72)}

.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.work-card,.feature-card,.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.work-card:hover,.feature-card:hover,.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.work-card{overflow:hidden}
.work-card img{width:100%;height:auto}

.intro-card{max-width:920px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:44px 48px;box-shadow:var(--shadow)}
.intro-card p{font-size:15px;margin-bottom:16px}
.intro-card p:last-of-type{margin-bottom:24px}
.intro-chips{display:flex;gap:12px;flex-wrap:wrap}
.chip{background:var(--primary-soft);color:var(--primary-deep);font-size:14px;font-weight:600;padding:8px 18px;border-radius:999px}

.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feature-card{padding:30px 28px}
.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:18px}
.feature-icon svg{width:24px;height:24px}
.feature-card h3{font-size:18px;font-weight:700;margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--text-sub)}

.compare-card{max-width:920px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow)}
.compare-table{width:100%;table-layout:fixed;border-collapse:collapse}
.compare-table th,.compare-table td{padding:15px 18px;text-align:center;font-size:14px;border-bottom:1px solid var(--border);white-space:nowrap}
.compare-table thead th{background:#fafbfd;color:var(--text);font-size:15px;font-weight:700}
.compare-table tbody tr:last-child td{border-bottom:0}
.compare-table th:nth-child(2),.compare-table td:nth-child(2){background:var(--primary-soft);color:var(--text);font-weight:600}
.compare-table thead th:nth-child(2){color:var(--primary-deep)}
.compare-table .label-col{text-align:left;color:var(--text-sub);font-weight:500}
.ok{color:var(--primary);font-weight:800}
.mid{color:#8a93a3;font-weight:600}
.no{color:#c3c8d2;font-weight:600}

.stats{background:linear-gradient(140deg,#1b1e28,#2b3040)}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px}
.stat-card{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-radius:var(--radius);padding:30px 18px;text-align:center;transition:transform .3s,background .3s}
.stat-card:hover{transform:translateY(-6px);background:rgba(255,255,255,.1)}
.stat-num{font-size:38px;font-weight:800;color:#fff;line-height:1.2}
.stat-label{margin-top:8px;color:rgba(255,255,255,.72);font-size:14px}

.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{padding:24px}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{width:44px;height:44px;border-radius:50%;background:linear-gradient(135deg,var(--primary),#ff7a59);color:#fff;font-size:18px;font-weight:700;display:flex;align-items:center;justify-content:center;flex:none}
.review-name{font-size:15px;font-weight:700;line-height:1.3}
.review-stars{color:var(--star);font-size:14px;letter-spacing:2px;line-height:1.3}
.review-text{margin-top:14px;font-size:14px;color:var(--text-sub);line-height:1.8}

.version-card{max-width:760px;margin:0 auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius-lg);padding:38px 42px;box-shadow:var(--shadow)}
.version-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:22px}
.version-badge{background:var(--primary-soft);color:var(--primary-deep);font-size:22px;font-weight:800;padding:6px 18px;border-radius:12px;letter-spacing:.5px}
.version-date{color:var(--text-sub);font-size:14px}
.version-list{list-style:none}
.version-list li{position:relative;padding:0 0 14px 26px;font-size:15px}
.version-list li::before{content:"";position:absolute;left:4px;top:9px;width:8px;height:8px;border-radius:50%;background:var(--primary)}
.version-list li:last-child{padding-bottom:0}

.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:box-shadow .3s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:14px;padding:18px 22px;background:none;border:0;font-size:16px;font-weight:600;color:var(--text);cursor:pointer;text-align:left}
.faq-icon{width:24px;height:24px;flex:none;border-radius:50%;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;line-height:1;transition:transform .3s,background .3s,color .3s}
.faq-item.open .faq-icon{transform:rotate(45deg);background:var(--primary);color:#fff}
.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)}
.faq-item.open .faq-a{max-height:300px}

.download{background:linear-gradient(135deg,#ff4655,#ff7a59);padding:84px 0}
.download-title{color:#fff;font-size:36px;font-weight:800;text-align:center;line-height:1.35}
.download-title span{font-size:22px;font-weight:700;opacity:.95}
.download-meta{text-align:center;color:rgba(255,255,255,.92);font-size:15px;margin-top:14px;letter-spacing:.5px}
.download-btns{display:flex;justify-content:center;gap:18px;margin-top:30px}
.btn-dl{background:#fff;color:var(--primary);font-size:16px;font-weight:700;padding:15px 38px;box-shadow:0 10px 26px rgba(0,0,0,.16)}
.btn-dl:hover{transform:translateY(-2px);box-shadow:0 16px 34px rgba(0,0,0,.24)}
.download-tip{text-align:center;color:#fff;font-size:15px;margin-top:24px}

.footer{background:#16181f;padding:28px 0;text-align:center;color:#9aa1b0;font-size:13px}
.footer a{color:#d6dae3;text-decoration:none;transition:color .2s}
.footer a:hover{color:var(--primary)}

.to-top{position:fixed;right:24px;bottom:24px;width:46px;height:46px;border-radius:50%;background:var(--dark);color:#fff;font-size:20px;border:0;cursor:pointer;opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .3s,visibility .3s,transform .3s,background .3s;z-index:90;display:flex;align-items:center;justify-content:center}
.to-top.show{opacity:1;visibility:visible;transform:none}
.to-top:hover{background:var(--primary)}
a:focus-visible,button:focus-visible{outline:2px solid var(--primary);outline-offset:2px}

@media (max-width:1024px){
  .container{padding:0 20px}
  .nav{gap:14px}
  .hero h1{font-size:34px}
  .section{padding:64px 0}
  .section-title{font-size:28px}
}
@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr .9fr;gap:36px}
  .works-grid,.features-grid,.reviews-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:820px){
  .nav{gap:10px}
  .nav a{font-size:13px}
  .logo{font-size:18px}
  .nav-btn{font-size:12px;padding:6px 14px}
}
@media (max-width:640px){
  .nav{display:none}
  .nav-btn{font-size:13px;padding:9px 18px}
  .hero{padding:calc(var(--header-h) + 40px) 0 56px}
  .hero-inner{grid-template-columns:1fr}
  .hero h1{font-size:27px}
  .hero h1 .ver{font-size:18px}
  .hero-desc{font-size:15px}
  .hero-btns{flex-direction:column;align-items:stretch;margin-top:26px}
  .hero-btns .btn{width:100%}
  .works-grid,.features-grid,.reviews-grid{grid-template-columns:1fr}
  .section{padding:52px 0}
  .section-sub{margin-bottom:32px}
  .intro-card{padding:30px 22px}
  .compare-card{overflow-x:auto}
  .compare-table th,.compare-table td{padding:12px 8px;font-size:13px}
  .compare-table thead th{font-size:13.5px}
  .stat-num{font-size:32px}
  .version-card{padding:28px 22px}
  .version-head{flex-direction:column;align-items:flex-start}
  .download{padding:64px 0}
  .download-title{font-size:28px}
  .download-title span{font-size:17px}
  .download-meta{font-size:12px;white-space:nowrap}
  .download-btns{flex-direction:column;align-items:stretch;margin-top:26px}
  .btn-dl{width:100%}
  .to-top{right:16px;bottom:16px;width:42px;height:42px;font-size:18px}
}
@media (max-width:400px){
  .hero h1{font-size:24px}
  .section-title{font-size:25px}
}