/* ===== 变量 ===== */
:root{
  --primary:#FF5C8A;
  --primary-deep:#E64376;
  --primary-soft:#FFF1F6;
  --dark:#2C2233;
  --text:#4A3D4C;
  --muted:#9A8B98;
  --border:#F4E3EB;
  --bg:#FDF8FA;
  --card:#FFFFFF;
  --grad-a:#FFA0BE;
  --grad-b:#C9A2FF;
  --shadow:0 8px 20px rgba(255,92,138,.10);
  --shadow-hover:0 16px 32px rgba(255,92,138,.18);
  --radius:16px;
  --nav-h:68px;
}

/* ===== 基础 ===== */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}
a{color:inherit;text-decoration:none}
img{display:block;max-width:100%}
ul{list-style:none}
button{font-family:inherit}
.container{max-width:1160px;margin:0 auto;padding:0 24px}
main{padding-top:var(--nav-h)}
.section{padding:80px 0}
.section-tint{background:var(--primary-soft)}

/* ===== 模块标题 ===== */
.sec-head{text-align:center;margin-bottom:48px}
.sec-head h2{font-size:clamp(24px,3vw,34px);color:var(--dark);font-weight:800}
.sec-head p{margin-top:10px;color:var(--muted);font-size:15px}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;z-index:100;height:var(--nav-h);background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--border);transition:box-shadow .3s}
.nav.scrolled{box-shadow:0 6px 18px rgba(44,34,51,.08)}
.nav-inner{display:flex;align-items:center;height:var(--nav-h)}
.logo{font-size:22px;font-weight:800;color:var(--dark);letter-spacing:.5px;flex-shrink:0}
.logo span{color:var(--primary)}
.nav-menu{display:flex;gap:4px;margin-left:30px;flex:1;min-width:0}
.nav-menu a{font-size:14.5px;color:var(--text);padding:8px 10px;border-radius:8px;white-space:nowrap;transition:color .2s,background .2s}
.nav-menu a:hover{color:var(--primary-deep);background:var(--primary-soft)}
.nav-download{margin-left:auto;flex-shrink:0;font-size:14px;font-weight:600;color:#fff;background:linear-gradient(135deg,var(--primary),var(--primary-deep));padding:7px 16px;border-radius:999px;box-shadow:var(--shadow);transition:transform .25s,box-shadow .25s}
.nav-download:hover{transform:translateY(-2px);box-shadow:var(--shadow-hover)}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;padding:13px 28px;border-radius:12px;font-size:16px;font-weight:600;transition:transform .25s,box-shadow .25s,border-color .25s}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;box-shadow:var(--shadow)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:var(--shadow-hover)}
.btn-ghost{background:var(--card);color:var(--primary-deep);border:2px solid var(--border)}
.btn-ghost:hover{transform:translateY(-3px);border-color:var(--primary);box-shadow:var(--shadow)}

/* ===== Hero ===== */
.hero{background:linear-gradient(135deg,var(--primary-soft),#F4ECFF);padding:64px 0 88px}
.hero-inner{display:flex;align-items:center;gap:56px}
.hero-text{flex:1;min-width:0}
.hero h1{font-size:clamp(30px,4vw,46px);line-height:1.3;color:var(--dark);font-weight:800}
.hero-sub{margin:18px 0 26px;font-size:17px;max-width:560px}
.hero-points{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:30px}
.chip{font-size:13px;color:var(--primary-deep);background:var(--card);border:1px solid var(--border);padding:6px 14px;border-radius:999px}
.hero-btns{display:flex;gap:16px;flex-wrap:wrap}
.hero-img{flex:0 0 340px}
.hero-img img{width:100%;height:auto;aspect-ratio:2/3;border-radius:var(--radius);box-shadow:var(--shadow-hover)}

/* ===== 作品预览 ===== */
.works-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:24px}
.work-card{background:var(--card);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.work-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.work-card img{width:100%;height:auto;aspect-ratio:2/3}

/* ===== 产品介绍 ===== */
.intro-card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:48px;box-shadow:var(--shadow)}
.intro-card>p{font-size:17px;text-align:center;max-width:760px;margin:0 auto}
.intro-list{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;margin-top:36px}
.intro-item{background:var(--primary-soft);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .3s,box-shadow .3s}
.intro-item:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.intro-item h3{font-size:17px;color:var(--dark);margin-bottom:8px}
.intro-item p{font-size:14px;color:var(--muted)}

/* ===== 核心功能 ===== */
.features-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.feature-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.feature-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.feature-icon{width:52px;height:52px;border-radius:14px;display:flex;align-items:center;justify-content:center;background:linear-gradient(135deg,var(--grad-a),var(--grad-b));margin-bottom:16px}
.feature-icon svg{width:26px;height:26px}
.feature-card h3{font-size:18px;color:var(--dark);margin-bottom:8px}
.feature-card p{font-size:14px;color:var(--muted)}

/* ===== 优势对比 ===== */
.compare-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch}
.compare-table{width:100%;min-width:600px;border-collapse:separate;border-spacing:0;table-layout:fixed}
.compare-table th,.compare-table td{padding:16px 18px;text-align:center;font-size:15px;border-bottom:1px solid var(--border)}
.compare-table th:first-child,.compare-table td:first-child{text-align:left;color:var(--muted);font-weight:600}
.compare-table thead th{color:var(--dark);font-weight:700;background:var(--primary-soft)}
.compare-table thead th.col-ours{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff}
.compare-table td.col-ours{background:var(--primary-soft);color:var(--primary-deep);font-weight:600}
.compare-table tbody tr:last-child td{border-bottom:none}
.scroll-tip{display:none;text-align:center;color:var(--muted);font-size:13px;margin-top:14px}

/* ===== 平台数据 ===== */
.stats-grid{display:grid;grid-template-columns:repeat(5,1fr);gap:20px}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:28px 16px;text-align:center;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.stat-card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.stat-num{font-size:34px;font-weight:800;line-height:1.3;color:var(--primary-deep);background:linear-gradient(135deg,var(--primary),#B06AFF);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-label{margin-top:6px;font-size:14px;color:var(--muted)}

/* ===== 用户评价 ===== */
.reviews-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.review-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);transition:transform .3s,box-shadow .3s}
.review-card:hover{transform:translateY(-6px);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%;background:linear-gradient(135deg,var(--grad-a),var(--grad-b));color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0}
.review-info strong{display:block;color:var(--dark);font-size:15px}
.stars{color:#FFB44D;font-size:14px;letter-spacing:2px}
.review-text{font-size:14px}

/* ===== 版本更新 ===== */
.update-card{background:var(--card);border:1px solid var(--border);border-radius:20px;padding:40px;box-shadow:var(--shadow);max-width:820px;margin:0 auto}
.update-top{display:flex;align-items:center;gap:16px;flex-wrap:wrap;margin-bottom:20px}
.version-badge{background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;padding:6px 16px;border-radius:999px;font-weight:700;font-size:15px}
.update-date{color:var(--muted);font-size:14px}
.update-list li{padding:10px 0 10px 26px;position:relative;border-bottom:1px dashed var(--border);font-size:15px}
.update-list li:last-child{border-bottom:none}
.update-list li::before{content:"";position:absolute;left:6px;top:17px;width:6px;height:6px;border-radius:50%;background:var(--primary)}

/* ===== FAQ ===== */
.faq-list{max-width:820px;margin:0 auto}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:14px;margin-bottom:14px;overflow:hidden;transition:box-shadow .3s}
.faq-item.open{box-shadow:var(--shadow)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:16px;padding:18px 22px;background:none;border:none;cursor:pointer;font-size:16px;font-weight:600;color:var(--dark);text-align:left}
.faq-arrow{width:18px;height:18px;flex-shrink:0;color:var(--primary);transition:transform .3s}
.faq-item.open .faq-arrow{transform:rotate(180deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-a p{padding:0 22px 20px;font-size:14.5px;color:var(--muted)}

/* ===== 下载区域 ===== */
.download{background:linear-gradient(135deg,var(--primary-soft),#F1EAFF);padding:90px 0}
.download-inner{text-align:center}
.download h1{font-size:clamp(26px,3.5vw,40px);color:var(--dark);font-weight:800}
.dl-meta{margin:16px 0 32px;color:var(--muted);font-size:15px}
.dl-btns{display:flex;gap:18px;justify-content:center;flex-wrap:wrap}
.dl-tip{margin-top:26px;color:var(--primary-deep);font-size:15px}

/* ===== 页脚 ===== */
.footer{background:var(--dark);padding:34px 0;text-align:center}
.footer p{color:#B9AFC2;font-size:14px}
.footer a{color:#fff;text-decoration:none;transition:color .2s}
.footer a:hover{color:var(--grad-a)}

/* ===== 返回顶部 ===== */
.back-top{position:fixed;right:24px;bottom:28px;width:46px;height:46px;border-radius:50%;border:none;background:linear-gradient(135deg,var(--primary),var(--primary-deep));color:#fff;cursor:pointer;display:flex;align-items:center;justify-content:center;box-shadow:var(--shadow-hover);opacity:0;visibility:hidden;transform:translateY(10px);transition:opacity .3s,transform .3s,visibility .3s;z-index:99}
.back-top.show{opacity:1;visibility:visible;transform:translateY(0)}
.back-top:hover{transform:translateY(-3px)}
.back-top svg{width:20px;height:20px}

/* ===== 平板 ≤1024 ===== */
@media (max-width:1024px){
  .nav-menu{margin-left:18px}
  .nav-menu a{padding:8px 7px;font-size:13.5px}
  .works-grid{grid-template-columns:repeat(2,1fr)}
  .features-grid,.reviews-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(3,1fr)}
  .hero-img{flex-basis:300px}
}

/* ===== 手机 ≤768 ===== */
@media (max-width:768px){
  .container{padding:0 20px}
  .section{padding:56px 0}
  .nav-menu{display:none}
  .hero{padding:44px 0 60px}
  .hero-inner{flex-direction:column;gap:36px}
  .hero-text{width:100%}
  .hero h1{font-size:28px}
  .hero-sub{font-size:15.5px}
  .hero-btns{flex-direction:column;width:100%}
  .hero-btns .btn{width:100%}
  .hero-img{flex:none;width:100%;max-width:340px;margin:0 auto}
  .works-grid{grid-template-columns:1fr;gap:18px}
  .intro-card{padding:30px 24px}
  .intro-list{grid-template-columns:1fr}
  .features-grid{grid-template-columns:1fr}
  .stats-grid{grid-template-columns:repeat(2,1fr);gap:14px}
  .stat-card:last-child{grid-column:1/-1}
  .reviews-grid{grid-template-columns:1fr}
  .scroll-tip{display:block}
  .update-card{padding:28px 22px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-btns{flex-direction:column;width:100%}
  .dl-btns .btn{width:100%}
  .download{padding:64px 0}
  .back-top{right:16px;bottom:20px;width:42px;height:42px}
}