:root{
  --primary:#FF4D7D;
  --primary-dark:#F0336A;
  --primary-light:#FFE9F1;
  --dark:#252530;
  --text:#464B55;
  --text-light:#8B909C;
  --border:#F2E6EC;
  --bg:#FFFFFF;
  --bg-soft:#FFF7FA;
  --radius:14px;
  --shadow:0 10px 24px rgba(255,77,125,.12);
  --shadow-hover:0 16px 32px rgba(255,77,125,.18);
  --header-h:64px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:"PingFang SC","Hiragino Sans GB","Microsoft YaHei",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,sans-serif;color:var(--text);background:var(--bg);line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%;height:auto}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
section[id]{scroll-margin-top:calc(var(--header-h) + 12px)}

.site-header{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--header-h);background:rgba(255,255,255,.92);backdrop-filter:blur(10px);-webkit-backdrop-filter:blur(10px);border-bottom:1px solid transparent;transition:box-shadow .3s,border-color .3s}
.site-header.scrolled{box-shadow:0 4px 16px rgba(37,37,48,.06);border-color:var(--border)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:100%}
.logo{display:flex;align-items:center;font-size:22px;font-weight:800;color:var(--dark);white-space:nowrap}
.nav{display:flex;align-items:center;gap:4px}
.nav a{padding:8px 11px;font-size:14px;font-weight:500;color:var(--text);border-radius:8px;transition:color .2s,background .2s}
.nav a:hover{color:var(--primary);background:var(--primary-light)}
.nav a.active{color:var(--primary);font-weight:700}
.nav-btn{display:inline-flex;align-items:center;justify-content:center;padding:8px 18px;font-size:14px;font-weight:600;color:#fff;background:var(--primary);border-radius:12px;transition:background .2s,transform .2s}
.nav-btn:hover{background:var(--primary-dark)}

.hero{padding:calc(var(--header-h) + 70px) 0 90px;background:linear-gradient(180deg,var(--bg-soft),var(--bg))}
.hero-inner{display:grid;grid-template-columns:1.1fr .9fr;gap:56px;align-items:center}
.hero h1{font-size:46px;line-height:1.25;font-weight:800;color:var(--dark)}
.hero .ver{font-style:normal;color:var(--primary)}
.hero-desc{margin-top:20px;font-size:17px;color:var(--text);max-width:520px}
.hero-btns{margin-top:32px;display:flex;gap:16px;flex-wrap:wrap}
.btn{display:inline-flex;align-items:center;justify-content:center;padding:14px 30px;font-size:16px;font-weight:700;border-radius:12px;transition:transform .2s,box-shadow .2s,background .2s,color .2s}
.btn-primary{background:var(--primary);color:#fff;box-shadow:0 8px 18px rgba(255,77,125,.28)}
.btn-primary:hover{background:var(--primary-dark);transform:translateY(-2px);box-shadow:0 12px 24px rgba(255,77,125,.32)}
.btn-ghost{background:#fff;color:var(--primary);border:1.5px solid var(--primary)}
.btn-ghost:hover{background:var(--primary-light);transform:translateY(-2px)}
.hero-meta{margin-top:26px;display:flex;gap:10px;flex-wrap:wrap;list-style:none}
.hero-meta li{font-size:13px;font-weight:600;color:var(--primary-dark);background:var(--primary-light);padding:5px 14px;border-radius:999px}
.hero-img img{width:100%;max-width:360px;margin:0 auto;border-radius:20px;box-shadow:var(--shadow-hover);border:6px solid #fff}

.section{padding:90px 0}
.section-alt{background:var(--bg-soft)}
.section-title{font-size:32px;font-weight:800;color:var(--dark);text-align:center}
.section-sub{margin-top:10px;font-size:15px;color:var(--text-light);text-align:center}

.works-grid{margin-top:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:10px;transition:transform .25s,box-shadow .25s}
.work-card img{border-radius:calc(var(--radius) - 6px);width:100%}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}

.intro-grid{margin-top:44px;display:grid;grid-template-columns:1.3fr 1fr;gap:48px;align-items:center}
.intro-text p{font-size:16px;color:var(--text);margin-bottom:16px}
.intro-text p:last-child{margin-bottom:0}
.intro-list{list-style:none;display:flex;flex-direction:column;gap:14px}
.intro-list li{display:flex;align-items:center;gap:10px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:16px 18px;font-size:15px;font-weight:600;color:var(--dark);transition:transform .2s,box-shadow .2s}
.intro-list li:hover{transform:translateY(-4px);box-shadow:var(--shadow)}
.intro-list svg{width:22px;height:22px;color:var(--primary);flex-shrink:0}

.features-grid{margin-top:44px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px 26px;transition:transform .25s,box-shadow .25s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.f-icon{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;border-radius:14px;background:var(--primary-light);color:var(--primary);margin-bottom:18px}
.f-icon svg{width:26px;height:26px}
.feature-card h3{font-size:19px;font-weight:700;color:var(--dark);margin-bottom:10px}
.feature-card p{font-size:14px;color:var(--text-light);line-height:1.7}

.table-scroll{margin-top:44px;overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff}
.compare-table{width:100%;min-width:640px;border-collapse:collapse;table-layout:fixed}
.compare-table th,.compare-table td{padding:16px 18px;text-align:left;font-size:15px;border-bottom:1px solid var(--border)}
.compare-table thead th{background:var(--dark);color:#fff;font-weight:700}
.compare-table th:nth-child(2),.compare-table td:nth-child(2){background:var(--primary-light);color:var(--primary-dark);font-weight:600}
.compare-table thead th:nth-child(2){background:var(--primary);color:#fff}
.compare-table tbody tr:last-child td{border-bottom:none}
.scroll-hint{display:none;margin-top:12px;font-size:12px;color:var(--text-light);text-align:center}

.data-grid{margin-top:44px;display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.data-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:34px 20px;text-align:center;transition:transform .25s,box-shadow .25s}
.data-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.data-card strong{display:block;font-size:40px;font-weight:800;color:var(--primary);line-height:1.2}
.data-card span{display:block;margin-top:8px;font-size:15px;color:var(--text)}

.reviews-grid{margin-top:44px;display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .25s,box-shadow .25s}
.review-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.review-head{display:flex;align-items:center;gap:12px}
.avatar{width:46px;height:46px;border-radius:50%;background:var(--primary-light);color:var(--primary);display:inline-flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0}
.review-user h3{font-size:15px;font-weight:700;color:var(--dark);line-height:1.3}
.stars{display:block;font-size:14px;color:#FFB400;letter-spacing:1px;line-height:1.4}
.review-text{margin-top:14px;font-size:14px;color:var(--text);line-height:1.75}

.version-card{margin:44px auto 0;max-width:820px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:32px 36px}
.version-head{display:flex;align-items:center;gap:16px;flex-wrap:wrap;padding-bottom:20px;border-bottom:1px solid var(--border)}
.version-tag{display:inline-flex;align-items:center;padding:6px 16px;font-size:15px;font-weight:800;color:#fff;background:var(--primary);border-radius:999px}
.version-date{font-size:14px;color:var(--text-light)}
.version-log{margin-top:20px;list-style:none;display:flex;flex-direction:column;gap:12px}
.version-log li{display:flex;align-items:flex-start;gap:10px;font-size:15px;color:var(--text)}
.version-log svg{width:18px;height:18px;color:var(--primary);flex-shrink:0;margin-top:3px}

.faq-list{margin:44px auto 0;max-width:820px;display:flex;flex-direction:column;gap:14px}
.faq-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .25s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;align-items:center;justify-content:space-between;gap:16px;padding:20px 24px;background:none;border:none;cursor:pointer;font-size:16px;font-weight:700;color:var(--dark);text-align:left}
.faq-q svg{width:18px;height:18px;color:var(--primary);flex-shrink:0;transition:transform .3s}
.faq-item.open .faq-q svg{transform:rotate(180deg)}
.faq-a{display:grid;grid-template-rows:0fr;transition:grid-template-rows .3s ease}
.faq-item.open .faq-a{grid-template-rows:1fr}
.faq-a-inner{overflow:hidden;min-height:0}
.faq-a-inner p{padding:0 24px 22px;font-size:15px;color:var(--text);line-height:1.8}

.download{padding:90px 0;background:linear-gradient(180deg,var(--primary-light),var(--bg));text-align:center}
.download-inner{max-width:720px;margin:0 auto;text-align:center}
.download h1{font-size:40px;font-weight:800;color:var(--dark)}
.download .ver{font-style:normal;color:var(--primary)}
.download-meta{margin-top:16px;font-size:15px;color:var(--text-light)}
.download-btns{margin-top:34px;display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.download-btns .btn{padding:16px 34px;font-size:17px;border-radius:14px}
.download-tip{margin-top:26px;font-size:14px;color:var(--text)}

.site-footer{background:var(--dark);padding:34px 0;text-align:center}
.site-footer p{color:#C7CAD3;font-size:14px}
.site-footer a{color:#fff;transition:opacity .2s}
.site-footer a:hover{opacity:.85}

.back-top{position:fixed;right:26px;bottom:30px;width:46px;height:46px;border-radius:50%;border:1px solid var(--border);background:#fff;color:var(--primary);display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow);opacity:0;visibility:hidden;transform:translateY(12px);transition:opacity .3s,transform .3s,visibility .3s;z-index:90}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top svg{width:20px;height:20px}
.back-top:hover{background:var(--primary-light)}

@media (max-width:1024px){
  .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)}
  .intro-grid{grid-template-columns:1fr;gap:28px}
  .nav a{padding:8px 8px;font-size:13px}
  .hero h1{font-size:38px}
}

@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:64px 0}
  .nav{display:none}
  .logo{min-height:44px}
  .nav-btn{min-height:44px;padding:10px 20px}
  .hero{padding:calc(var(--header-h) + 36px) 0 56px}
  .hero-inner{grid-template-columns:1fr;gap:36px;text-align:center}
  .hero-desc{margin-left:auto;margin-right:auto}
  .hero-btns{margin-top:26px;flex-direction:column;gap:12px}
  .hero-btns .btn{width:100%}
  .hero-meta{justify-content:center}
  .hero-meta li{font-size:14px}
  .hero-img img{max-width:300px}
  .works-grid{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .reviews-grid{grid-template-columns:1fr}
  .data-grid{gap:14px}
  .data-card strong{font-size:32px}
  .section-title{font-size:26px}
  .section-sub{font-size:14px}
  .compare-table{min-width:600px}
  .compare-table th,.compare-table td{padding:14px 14px;font-size:14px}
  .scroll-hint{display:block}
  .download{padding:64px 0}
  .download h1{font-size:28px}
  .download-meta{font-size:12px;white-space:nowrap}
  .download-btns{flex-direction:column;gap:12px}
  .download-btns .btn{width:100%}
  .version-card{padding:24px 20px}
  .faq-q{font-size:15px;padding:16px 18px}
  .faq-a-inner p{padding:0 18px 18px}
  .back-top{right:16px;bottom:20px}
}