:root{
  --green:#1aa872;
  --green-dark:#138a5e;
  --green-light:#e7f7f0;
  --ink:#0f1b16;
  --muted:#5b6b64;
  --bg:#ffffff;
  --bg-alt:#f5faf8;
  --border:#e4ece9;
  --shadow:0 10px 30px rgba(16,40,30,.08);
  --radius:16px;
  --maxw:1140px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{text-decoration:none;color:inherit}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
h1,h2,h3,h4{line-height:1.25;font-weight:700}

/* 按钮 */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:11px 22px;border-radius:999px;font-weight:600;font-size:15px;cursor:pointer;
  border:1px solid transparent;transition:.2s;white-space:nowrap}
.btn-lg{padding:14px 30px;font-size:16px}
.btn-block{width:100%}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-dark);transform:translateY(-1px)}
.btn-ghost{background:transparent;border-color:var(--border);color:var(--ink)}
.btn-ghost:hover{border-color:var(--green);color:var(--green)}
.btn-light{background:#fff;color:var(--green-dark)}
.btn-light:hover{background:var(--green-light)}

/* 导航 */
.navbar{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.85);
  backdrop-filter:blur(10px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:64px}
.logo{display:flex;align-items:center;gap:10px;font-weight:800}
.logo-mark{display:inline-grid;place-items:center;width:34px;height:34px;border-radius:9px;
  background:var(--green);color:#fff;font-weight:800;font-size:16px}
.logo-text{font-size:18px;display:flex;flex-direction:column;line-height:1}
.logo-text small{font-size:11px;font-weight:600;color:var(--muted);margin-top:2px}
.nav-links{display:flex;gap:26px;font-size:15px;font-weight:500}
.nav-links a{color:var(--muted);transition:.2s;position:relative;padding:4px 0}
.nav-links a:hover{color:var(--ink)}
.nav-links a.active{color:var(--green)}
.nav-links a.active::after{content:"";position:absolute;left:0;right:0;bottom:-2px;height:2px;background:var(--green);border-radius:2px}
.nav-cta{margin-left:8px}
.nav-toggle{display:none;flex-direction:column;gap:5px;background:none;border:0;cursor:pointer;padding:8px}
.nav-toggle span{width:22px;height:2px;background:var(--ink);border-radius:2px}

/* Hero */
.hero{position:relative;overflow:hidden;padding:90px 0 80px;text-align:center}
.hero-bg{position:absolute;inset:0;z-index:-1;
  background:
    radial-gradient(60% 60% at 20% 10%,rgba(26,168,114,.18),transparent 60%),
    radial-gradient(50% 50% at 85% 20%,rgba(26,168,114,.12),transparent 60%),
    linear-gradient(180deg,var(--green-light),#fff 70%)}
.hero-badge{display:inline-block;background:#fff;border:1px solid var(--border);color:var(--green-dark);
  font-size:13px;font-weight:600;padding:7px 16px;border-radius:999px;box-shadow:var(--shadow);margin-bottom:22px}
.hero-title{font-size:46px;letter-spacing:-.5px;margin-bottom:18px}
.hero-sub{max-width:640px;margin:0 auto 30px;color:var(--muted);font-size:17px}
.hero-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.hero-stats{display:flex;gap:40px;justify-content:center;margin-top:50px;flex-wrap:wrap}
.hero-stat{display:flex;flex-direction:column}
.hero-stat strong{font-size:30px;color:var(--green-dark)}
.hero-stat span{font-size:14px;color:var(--muted)}

/* 区块 */
.section{padding:80px 0}
.section-alt{background:var(--bg-alt)}
.section-head{text-align:center;max-width:640px;margin:0 auto 48px}
.section-head h2{font-size:32px;margin-bottom:10px}
.section-head p{color:var(--muted);font-size:16px}

/* 网格 */
.grid{display:grid;gap:22px}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-3{grid-template-columns:repeat(3,1fr)}
.card{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:26px;
  box-shadow:var(--shadow);transition:.2s}
.card:hover{transform:translateY(-3px);border-color:#cfe7dd}

/* 平台卡 */
.platform{text-align:center}
.platform-icon{display:inline-grid;place-items:center;width:54px;height:54px;border-radius:14px;
  font-size:26px;color:#fff;margin-bottom:14px}
.platform-icon.win{background:#1aa872}
.platform-icon.mac{background:#3a7bd5}
.platform-icon.linux{background:#f59e0b}
.platform h3{font-size:19px;margin-bottom:6px}
.platform p{color:var(--muted);font-size:14px}

/* 功能卡 */
.feature-icon{display:inline-grid;place-items:center;width:48px;height:48px;border-radius:12px;
  background:var(--green-light);color:var(--green-dark);font-size:22px;margin-bottom:14px}
.feature h3{font-size:18px;margin-bottom:8px}
.feature p{color:var(--muted);font-size:14px}

/* 下载 */
.download-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.download-card{border:1px solid var(--border);border-radius:var(--radius);padding:26px;background:#fff;box-shadow:var(--shadow)}
.download-top{display:flex;align-items:center;gap:14px;margin-bottom:18px}
.download-top h3{font-size:20px;margin-bottom:2px}
.download-top p{color:var(--muted);font-size:13px}
.download-meta{list-style:none;display:flex;flex-direction:column;gap:8px;margin-bottom:20px;
  border-top:1px dashed var(--border);border-bottom:1px dashed var(--border);padding:16px 0}
.download-meta li{display:flex;justify-content:space-between;font-size:14px;color:var(--muted)}
.download-meta b{color:var(--ink)}
.download-more{text-align:center;margin-top:26px}
.download-more a{color:var(--green-dark);font-weight:600}

/* 截图 */
.shot{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;background:#fff;box-shadow:var(--shadow)}
.shot img{width:100%}
.shot figcaption{padding:14px 18px;font-size:14px;color:var(--muted);border-top:1px solid var(--border)}

/* 关于 */
.about-inner{display:grid;grid-template-columns:1.4fr 1fr;gap:40px;align-items:start}
.about-text h2{font-size:30px;margin-bottom:18px}
.about-text p{color:var(--muted);margin-bottom:14px}
.about-facts{border:1px solid var(--border);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.fact{display:flex;flex-direction:column;gap:2px;padding:16px 20px;border-bottom:1px solid var(--border);background:#fff}
.fact:last-child{border-bottom:0}
.fact-label{font-size:13px;color:var(--muted)}
.fact-value{font-size:15px;font-weight:600}

/* 评价 */
.quote p{color:var(--muted);font-size:15px;margin-bottom:18px}
.quote-author{display:flex;align-items:center;gap:12px}
.avatar{width:42px;height:42px;border-radius:50%;background:var(--green);color:#fff;display:grid;place-items:center;font-weight:700}
.quote-author b{display:block;font-size:15px}
.quote-author small{color:var(--muted);font-size:13px}

/* CTA */
.cta{background:linear-gradient(135deg,var(--green),var(--green-dark));color:#fff;text-align:center;padding:70px 0}
.cta h2{font-size:32px;margin-bottom:10px}
.cta p{opacity:.9;margin-bottom:26px}

/* 页脚 */
.footer{background:#0f1b16;color:#cdd8d3;padding:54px 0 0}
.footer-inner{display:grid;grid-template-columns:1.3fr 2fr;gap:40px;padding-bottom:40px}
.footer-brand .logo .logo-text{color:#fff}
.footer-brand p{margin-top:14px;font-size:14px;color:#9fb0a9;max-width:280px}
.footer-links{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}
.footer-links h4{color:#fff;font-size:15px;margin-bottom:14px}
.footer-links a{display:block;color:#9fb0a9;font-size:14px;padding:5px 0;transition:.2s}
.footer-links a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:18px 0}
.footer-bottom p{font-size:13px;color:#7e8f88;text-align:center}

/* 响应式 */
@media(max-width:900px){
  .grid-3,.download-grid{grid-template-columns:repeat(2,1fr)}
  .about-inner{grid-template-columns:1fr}
  .nav-links{position:absolute;top:64px;left:0;right:0;background:#fff;flex-direction:column;gap:0;
    padding:10px 20px;border-bottom:1px solid var(--border);display:none}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 0;border-bottom:1px solid var(--border)}
  .nav-cta{display:none}
  .nav-toggle{display:flex}
}
@media(max-width:600px){
  .hero-title{font-size:34px}
  .grid-2,.grid-3,.download-grid{grid-template-columns:1fr}
  .hero-stats{gap:24px}
  .footer-inner{grid-template-columns:1fr}
  .footer-links{grid-template-columns:repeat(3,1fr)}
}