:root{
  --c-primary:#16a34a;
  --c-primary-dark:#15803d;
  --c-primary-soft:#e9f7ef;
  --c-green-bg:#f0fdf4;
  --c-dark:#0f172a;
  --c-text:#334155;
  --c-muted:#64748b;
  --c-border:#e2e8f0;
  --c-bg:#f8fafc;
  --c-card:#ffffff;
  --c-gold:#f59e0b;
  --radius:16px;
  --radius-sm:10px;
  --shadow-soft:0 6px 24px rgba(15,23,42,.07);
  --shadow-hover:0 16px 32px rgba(22,163,74,.16);
  --nav-h:64px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:calc(var(--nav-h) + 14px)}
body{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;color:var(--c-text);background:var(--c-bg);line-height:1.7;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%}
a{text-decoration:none}
ul{list-style:none}
button{font-family:inherit}

.wrap{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:76px 0}
.sec-head{text-align:center;margin-bottom:44px}
.sec-head h2{font-size:30px;color:var(--c-dark);font-weight:800;letter-spacing:.5px}
.sec-head p{color:var(--c-muted);margin-top:10px;font-size:15px}

/* ===== 导航 ===== */
.nav{position:fixed;top:0;left:0;right:0;height:var(--nav-h);background:rgba(255,255,255,.94);border-bottom:1px solid var(--c-border);z-index:100;transition:box-shadow .25s}
.nav.scrolled{box-shadow:var(--shadow-soft)}
.nav-inner{max-width:1200px;margin:0 auto;padding:0 24px;height:100%;display:flex;align-items:center;justify-content:space-between;gap:14px}
.logo{display:flex;align-items:center;gap:9px;font-size:22px;font-weight:800;color:var(--c-primary);white-space:nowrap}
.logo-mark{width:34px;height:34px;border-radius:var(--radius-sm);background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:17px;font-weight:700;flex-shrink:0}
.nav-links{display:flex;gap:2px}
.nav-links a{padding:6px 11px;border-radius:8px;color:var(--c-text);font-size:14px;transition:color .2s,background .2s;white-space:nowrap}
.nav-links a:hover{color:var(--c-primary);background:var(--c-primary-soft)}

/* ===== 按钮 ===== */
.btn{display:inline-flex;align-items:center;justify-content:center;border-radius:var(--radius-sm);font-weight:600;border:1px solid transparent;cursor:pointer;transition:transform .2s,box-shadow .2s,background .2s,color .2s}
.btn-primary{background:var(--c-primary);color:#fff}
.btn-primary:hover{background:var(--c-primary-dark);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-outline{background:var(--c-card);color:var(--c-primary);border-color:var(--c-primary)}
.btn-outline:hover{background:var(--c-primary-soft);transform:translateY(-2px);box-shadow:var(--shadow-hover)}
.btn-lg{padding:14px 30px;font-size:16px;border-radius:12px}
.btn-nav{padding:7px 15px;font-size:13px;border-radius:9px}

/* ===== Hero ===== */
.hero{background:linear-gradient(180deg,var(--c-green-bg) 0%,var(--c-bg) 100%);padding:calc(var(--nav-h) + 52px) 0 76px}
.hero-inner{display:grid;grid-template-columns:1.15fr .85fr;gap:52px;align-items:center}
.hero h1{font-size:38px;color:var(--c-dark);font-weight:800;line-height:1.25}
.ver{display:inline-block;margin-left:6px;padding:3px 13px;border-radius:999px;background:var(--c-primary-soft);color:var(--c-primary-dark);font-size:15px;font-weight:700;vertical-align:middle}
.hero .lead{color:var(--c-text);font-size:16.5px;margin:18px 0 28px;max-width:560px}
.hero-actions{display:flex;gap:14px;flex-wrap:wrap}
.hero-tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:26px}
.hero-tags li{font-size:13px;color:var(--c-muted);border:1px solid var(--c-border);background:var(--c-card);padding:5px 13px;border-radius:999px}
.hero-img{max-width:420px;margin:0 auto}
.hero-img img{width:100%;height:auto;border-radius:var(--radius);box-shadow:var(--shadow-hover)}

/* ===== 卡片 ===== */
.card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-hover)}
.card-icon{width:48px;height:48px;border-radius:12px;background:var(--c-primary-soft);color:var(--c-primary);display:flex;align-items:center;justify-content:center;margin-bottom:16px}
.card-icon svg{width:24px;height:24px}
.i-card h3,.f-card h3{font-size:17px;color:var(--c-dark);margin-bottom:8px}
.i-card p,.f-card p{font-size:14px;color:var(--c-muted)}

/* ===== 作品预览 ===== */
.grid-works{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.work-card{overflow:hidden}
.work-card img{width:100%;height:auto}

/* ===== 产品介绍 ===== */
.intro-text{max-width:860px;margin:0 auto;font-size:16px;color:var(--c-text);text-align:center}
.intro-pts{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:40px}
.i-card{padding:26px 24px}

/* ===== 核心功能 ===== */
.feature-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.f-card{padding:28px 26px}

/* ===== 优势对比 ===== */
.compare-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-soft)}
table{width:100%;border-collapse:collapse;table-layout:fixed}
th,td{padding:16px 18px;text-align:center;border-bottom:1px solid var(--c-border);font-size:15px}
th{background:var(--c-dark);color:#fff;font-weight:600}
tbody tr:last-child td{border-bottom:none}
td:first-child{font-weight:600;color:var(--c-dark);background:var(--c-bg)}
td.ok{color:var(--c-primary);font-weight:600}
td.no{color:var(--c-muted)}

/* ===== 平台数据 ===== */
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.stat-card{padding:30px 20px;text-align:center}
.stat-card .num{font-size:34px;font-weight:800;color:var(--c-primary);line-height:1.2}
.stat-card .label{color:var(--c-muted);font-size:14px;margin-top:8px}

/* ===== 用户评价 ===== */
.review-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.review-card{padding:24px}
.r-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.r-avatar{width:44px;height:44px;border-radius:50%;background:var(--c-primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:700;flex-shrink:0}
.r-name{font-weight:700;color:var(--c-dark);font-size:15px}
.r-stars{color:var(--c-gold);font-size:13px;letter-spacing:2px}
.r-text{font-size:14.5px;color:var(--c-text);line-height:1.8}

/* ===== 版本更新 ===== */
.updates-card{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);padding:32px;max-width:780px;margin:0 auto;box-shadow:var(--shadow-soft)}
.u-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:20px}
.u-version{background:var(--c-dark);color:#fff;font-weight:700;padding:6px 16px;border-radius:999px;font-size:15px}
.u-date{color:var(--c-muted);font-size:14px}
.u-list li{padding:10px 0 10px 28px;position:relative;font-size:15px;color:var(--c-text);border-bottom:1px dashed var(--c-border)}
.u-list li:last-child{border-bottom:none}
.u-list li::before{content:"";position:absolute;left:6px;top:18px;width:8px;height:8px;border-radius:50%;background:var(--c-primary)}

/* ===== FAQ ===== */
.faq-list{max-width:780px;margin:0 auto;display:flex;flex-direction:column;gap:14px}
.faq-item{background:var(--c-card);border:1px solid var(--c-border);border-radius:var(--radius);overflow:hidden;transition:box-shadow .25s}
.faq-item:hover{box-shadow:var(--shadow-soft)}
.faq-q{width:100%;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:18px 22px;background:none;border:none;font-size:16px;font-weight:600;color:var(--c-dark);cursor:pointer;text-align:left}
.faq-icon{width:26px;height:26px;border-radius:50%;background:var(--c-primary-soft);color:var(--c-primary);display:flex;align-items:center;justify-content:center;font-size:18px;font-weight:600;flex-shrink:0;transition:transform .3s;line-height:1}
.faq-item.open .faq-icon{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .35s ease;padding:0 22px}
.faq-a p{padding-bottom:18px;font-size:14.5px;color:var(--c-text)}

/* ===== 下载区域 ===== */
.dl-section{background:linear-gradient(135deg,#14532d 0%,#166534 55%,#15803d 100%);color:#fff;text-align:center;padding:80px 0}
.dl-section h1{font-size:34px;font-weight:800;line-height:1.3}
.ver-light{background:rgba(255,255,255,.16);color:#fff}
.dl-meta{color:rgba(255,255,255,.82);font-size:14px;margin-top:14px}
.dl-actions{display:flex;justify-content:center;gap:18px;margin-top:30px;flex-wrap:wrap}
.btn-dl{background:#fff;color:var(--c-primary-dark);padding:15px 36px;font-size:16px;font-weight:700;border-radius:12px}
.btn-dl:hover{background:var(--c-green-bg);transform:translateY(-2px);box-shadow:0 14px 30px rgba(0,0,0,.22)}
.dl-tip{display:inline-flex;align-items:center;gap:8px;margin-top:30px;background:rgba(255,255,255,.12);padding:10px 20px;border-radius:999px;font-size:14.5px}

/* ===== 页脚 ===== */
footer{background:var(--c-dark);color:#94a3b8;text-align:center;padding:30px 0;font-size:14px}
footer a{color:#e2e8f0;transition:color .2s}
footer a:hover{color:var(--c-primary)}

/* ===== 返回顶部 ===== */
.to-top{position:fixed;right:22px;bottom:26px;width:44px;height:44px;border-radius:50%;background:var(--c-primary);color:#fff;border:none;cursor:pointer;display:flex;align-items:center;justify-content:center;opacity:0;visibility:hidden;transform:translateY(10px);transition:all .3s;box-shadow:var(--shadow-hover);z-index:99}
.to-top svg{width:20px;height:20px}
.to-top.show{opacity:1;visibility:visible;transform:none}

/* ===== 平板 ===== */
@media (max-width:1024px){
  .grid-works{grid-template-columns:repeat(2,1fr)}
  .feature-grid,.review-grid{grid-template-columns:repeat(2,1fr)}
  .stats-grid{grid-template-columns:repeat(2,1fr)}
  .nav-links{gap:0}
  .nav-links a{padding:6px 8px;font-size:13px}
}

@media (max-width:900px){
  .hero-inner{grid-template-columns:1fr;gap:36px;text-align:center}
  .hero .lead{margin-left:auto;margin-right:auto}
  .hero-actions{justify-content:center}
  .hero-tags{justify-content:center}
}

/* ===== 手机 ===== */
@media (max-width:768px){
  .wrap{padding:0 20px}
  .nav-inner{padding:0 20px}
  .nav-links{display:none}
  .section{padding:54px 0}
  .sec-head{margin-bottom:32px}
  .sec-head h2{font-size:24px}
  .hero{padding:calc(var(--nav-h) + 32px) 0 54px}
  .hero h1{font-size:27px}
  .hero .lead{font-size:15px}
  .hero-actions{flex-direction:column;width:100%}
  .hero-actions .btn{width:100%}
  .grid-works{grid-template-columns:1fr;gap:18px}
  .intro-pts,.feature-grid,.review-grid{grid-template-columns:1fr;gap:16px}
  .stats-grid{gap:16px}
  .stat-card .num{font-size:28px}
  .hero-tags li{font-size:14px}
  th,td{padding:12px 10px;font-size:14px}
  .updates-card{padding:24px 20px}
  .dl-section{padding:60px 0}
  .dl-section h1{font-size:26px}
  .dl-meta{font-size:12px;white-space:nowrap}
  .dl-actions{flex-direction:column;margin-top:24px}
  .dl-actions .btn{width:100%}
  .dl-tip{font-size:13px;padding:9px 16px}
  footer{padding:26px 0}
  .to-top{right:16px;bottom:20px}
}