:root{
    --ink:#111a17;
    --ink-2:#42504b;
    --ink-3:#6b7a74;
    --line:#e3e8e5;
    --bg:#ffffff;
    --bg-2:#f6f9f7;
    --brand:#16654b;
    --brand-2:#1d8a66;
    --brand-soft:#e8f4ef;
    --accent:#b45309;
    --radius:14px;
    --shadow:0 1px 2px rgba(17,26,23,.04), 0 8px 28px rgba(17,26,23,.06);
  }
  *{box-sizing:border-box}
  html{scroll-behavior:smooth}
  /* 顶部导航是吸顶的，锚点跳转要留出让位高度，否则标题被压在导航下面 */
  [id]{scroll-margin-top:82px}
  body{
    margin:0;background:var(--bg);color:var(--ink);
    font:16px/1.7 -apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
    -webkit-font-smoothing:antialiased;
  }
  a{color:var(--brand);text-decoration:none}
  .wrap{max-width:1080px;margin:0 auto;padding:0 24px}

  /* ---------- nav ---------- */
  header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.86);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
  .nav{display:flex;align-items:center;gap:28px;height:64px}
  .logo{display:flex;align-items:center;gap:9px;font-weight:700;font-size:17px;color:var(--ink)}
  .logo i{width:26px;height:26px;border-radius:7px;background:var(--brand);color:#fff;display:grid;place-items:center;font-style:normal;font-size:14px}
  .nav nav{display:flex;gap:22px;margin-left:auto}
  .nav nav a{color:var(--ink-2);font-size:14.5px}
  .nav nav a:hover{color:var(--brand)}
  .btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;height:38px;padding:0 18px;border-radius:9px;font-size:14.5px;font-weight:600;border:1px solid transparent;cursor:pointer;transition:.15s}
  .btn-primary{background:var(--brand);color:#fff}
  .btn-primary:hover{background:#11503c}
  .btn-ghost{border-color:var(--line);color:var(--ink);background:#fff}
  .btn-ghost:hover{border-color:#c9d5d0;background:var(--bg-2)}

  /* ---------- hero ---------- */
  .hero{padding:72px 0 56px;background:linear-gradient(180deg,#f7fbf9 0%,#fff 100%);border-bottom:1px solid var(--line)}
  .hero h1{margin:0 0 18px;font-size:40px;line-height:1.25;letter-spacing:-.5px;font-weight:800}
  .hero h1 em{font-style:normal;color:var(--brand);background:linear-gradient(180deg,transparent 62%,var(--brand-soft) 62%)}
  .hero p.lead{margin:0 0 28px;font-size:17.5px;color:var(--ink-2);max-width:640px}
  .hero .cta{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:14px}
  .hero .meta{font-size:13.5px;color:var(--ink-3)}
  .tagline{display:inline-flex;align-items:center;gap:8px;height:30px;padding:0 12px;border-radius:999px;background:var(--brand-soft);color:var(--brand);font-size:13px;font-weight:600;margin-bottom:20px}

  /* ---------- section ---------- */
  section{padding:64px 0}
  section.alt{background:var(--bg-2);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
  h2{margin:0 0 10px;font-size:27px;letter-spacing:-.3px}
  .sub{margin:0 0 36px;color:var(--ink-2);font-size:15.5px}

  .grid{display:grid;gap:18px;grid-template-columns:repeat(3,1fr)}
  .card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
  .card h3{margin:0 0 8px;font-size:16.5px}
  .card p{margin:0;color:var(--ink-2);font-size:14.5px;line-height:1.65}
  .card .ico{width:34px;height:34px;border-radius:9px;background:var(--brand-soft);color:var(--brand);display:grid;place-items:center;font-size:16px;margin-bottom:14px;font-weight:700}

  /* ---------- pricing ---------- */
  .plans{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:26px}
  .plan{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);position:relative}
  .plan.hot{border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft),var(--shadow)}
  .plan .badge{position:absolute;top:-11px;left:24px;background:var(--brand);color:#fff;font-size:12px;font-weight:600;padding:2px 10px;border-radius:999px}
  .plan h3{margin:0 0 4px;font-size:18px}
  .plan .desc{color:var(--ink-3);font-size:13.5px;margin-bottom:18px}
  table{width:100%;border-collapse:collapse;font-size:14.5px}
  th,td{padding:11px 6px;text-align:left;border-bottom:1px solid var(--line)}
  th{font-weight:600;color:var(--ink-3);font-size:13px}
  td.price{text-align:right;font-weight:700;font-size:16px;white-space:nowrap}
  tr:last-child td{border-bottom:0}
  .unit{font-size:12.5px;color:var(--ink-3);font-weight:400;margin-left:2px}
  .note{font-size:13.5px;color:var(--ink-2);background:#fff;border:1px dashed var(--line);border-radius:10px;padding:14px 16px}
  .note b{color:var(--ink)}

  /* ---------- steps ---------- */
  .steps{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;counter-reset:s}
  .step{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px;counter-increment:s}
  .step::before{content:counter(s);display:grid;place-items:center;width:28px;height:28px;border-radius:50%;background:var(--brand);color:#fff;font-size:14px;font-weight:700;margin-bottom:12px}
  .step h3{margin:0 0 6px;font-size:16px}
  .step p{margin:0;color:var(--ink-2);font-size:14.5px}

  /* ---------- install ---------- */
  .inst{display:grid;grid-template-columns:1fr;gap:16px}
  .istep{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:22px 24px;box-shadow:var(--shadow)}
  .istep .no{display:inline-flex;align-items:center;justify-content:center;width:24px;height:24px;border-radius:7px;background:var(--brand);color:#fff;font-size:13px;font-weight:700;margin-right:9px;vertical-align:-3px}
  .istep h3{margin:0 0 8px;font-size:16.5px;display:inline}
  .istep p{margin:8px 0 0;color:var(--ink-2);font-size:14.5px;line-height:1.7}
  .istep p.tip{color:var(--ink-3);font-size:13.5px}
  .shot{margin:14px 0 2px;border:1px solid var(--line);border-radius:12px;overflow:hidden;background:#fff}
  .shot svg{display:block;width:100%;height:auto}
  .kbd{display:inline-block;padding:1px 7px;border:1px solid #cfdad5;border-bottom-width:2px;border-radius:5px;background:#f7faf9;font:inherit;font-size:13px;color:var(--ink)}
  .warnbox{margin-top:12px;background:#fdf6ec;border:1px solid #f3dfc2;border-radius:10px;padding:12px 15px;font-size:13.8px;color:#7c4a11;line-height:1.75}
  .warnbox b{color:#8a3f06}
  .okbox{margin-top:12px;background:var(--brand-soft);border:1px solid #cfe6dc;border-radius:10px;padding:12px 15px;font-size:13.8px;color:#14523d;line-height:1.75}

  /* ---------- buy ---------- */
  .buygrid{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
  .buy{background:#fff;border:1px solid var(--line);border-radius:12px;padding:18px;font-size:14px;color:var(--ink-2);line-height:1.65}
  .buy b{display:block;color:var(--ink);font-size:15px;margin-bottom:6px}
  .buy .n{display:inline-flex;align-items:center;justify-content:center;width:22px;height:22px;border-radius:50%;background:var(--brand-soft);color:var(--brand);font-size:12.5px;font-weight:700;margin-right:6px}
  a.buybtn{display:inline-flex;align-items:center;justify-content:center;gap:6px;margin-top:16px;height:36px;padding:0 16px;border-radius:8px;background:var(--brand);color:#fff;font-size:14px;font-weight:600}
  a.buybtn:hover{background:#11503c}

  /* ---------- faq ---------- */
  details{background:#fff;border:1px solid var(--line);border-radius:12px;padding:16px 18px;margin-bottom:10px}
  details[open]{box-shadow:var(--shadow)}
  summary{cursor:pointer;font-weight:600;font-size:15px;list-style:none}
  summary::-webkit-details-marker{display:none}
  summary::before{content:"＋";color:var(--brand);font-weight:700;margin-right:9px;display:inline-block;transition:.2s}
  details[open] summary::before{transform:rotate(45deg)}
  details p{margin:10px 0 0 24px;color:var(--ink-2);font-size:14.5px}

  /* ---------- footer ---------- */
  footer{background:#0f1714;color:#a9b8b2;padding:44px 0 32px;font-size:14px}
  footer .cols{display:flex;gap:48px;flex-wrap:wrap;justify-content:space-between}
  footer .brand{color:#fff;font-weight:700;font-size:16px;margin-bottom:8px}
  footer a{color:#cfe0d9}
  footer .legal{margin-top:28px;padding-top:20px;border-top:1px solid #22302b;font-size:12.5px;line-height:1.8;color:#7f8f89}

  @media (max-width:860px){
    .grid,.steps{grid-template-columns:1fr}
    .plans{grid-template-columns:1fr}
    .buygrid{grid-template-columns:1fr 1fr}
    .hero h1{font-size:30px}
    .nav nav{display:none}
    section{padding:48px 0}
  }
  @media (max-width:520px){
    .buygrid{grid-template-columns:1fr}
  }

  /* ---------- 下载页专用 ---------- */
  .crumb{font-size:13.5px;color:var(--ink-3);padding:22px 0 0}
  .crumb a{color:var(--ink-3)}
  .crumb a:hover{color:var(--brand)}
  .crumb span{margin:0 7px;color:#c2cdc8}

  .tabs{display:flex;gap:8px;margin:26px 0 30px;flex-wrap:wrap}
  .tab{height:42px;padding:0 20px;border-radius:10px;border:1px solid var(--line);background:#fff;color:var(--ink-2);
       font-size:14.5px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:8px}
  .tab .dot{width:7px;height:7px;border-radius:50%;background:#c2cdc8}
  .tab.on{background:var(--brand);border-color:var(--brand);color:#fff}
  .tab.on .dot{background:#9fe3c6}
  .tab .soon{font-size:11.5px;font-weight:500;background:#f1f5f3;color:var(--ink-3);padding:1px 6px;border-radius:5px}
  .tab.on .soon{background:rgba(255,255,255,.18);color:#e7f5ef}

  .panel{display:none}
  .panel.on{display:block}

  .storegrid{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin-bottom:20px}
  .store{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
  .store .head{display:flex;align-items:center;gap:10px;margin-bottom:6px}
  .store .head .logo{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;color:#fff;font-weight:700;font-size:14px}
  .store h3{margin:0;font-size:16.5px}
  .store .for{color:var(--ink-3);font-size:13px;margin-bottom:14px}
  .store ol{margin:0;padding-left:20px;color:var(--ink-2);font-size:14.2px;line-height:1.8}
  .store .pending{margin-top:16px;background:#f6f9f7;border:1px dashed #cfdad5;border-radius:9px;padding:11px 13px;
                  font-size:13px;color:var(--ink-3);text-align:center}
  .adv{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin:8px 0 26px}
  .adv div{background:var(--brand-soft);border:1px solid #d5e9e0;border-radius:11px;padding:14px 16px;font-size:13.8px;color:#14523d;line-height:1.6}
  .adv b{display:block;font-size:14.2px;margin-bottom:3px}
  @media (max-width:860px){
    .storegrid,.adv{grid-template-columns:1fr}
  }