/* flai 官方下载站 · 独立骨架（第5列矩阵） */

:root{
  --main:#08C754;
  --main-d:#06a344;
  --main-t:#eafaf0;
  --main-l:#cdeee0;
  --alt:#E8467C;
  --alt-t:#fdeef3;
  --alt-l:#f6cad8;
  --ink:#141a16;
  --paper:#ffffff;
  --mist:#f4f7f5;
  --line:#e3e9e5;
  --line-2:#d2dcd6;
  --txt:#2a312c;
  --muted:#79837c;
  --sh-1:-18px 14px 0 -6px var(--main-l);
  --sh-2:0 16px 0 -8px var(--alt-l);
  --sh-3:16px -12px 0 -6px #b6e6cc;
  --sh-4:-14px -12px 0 -6px var(--alt-l);
  --sh-5:14px 12px 0 -6px var(--main-l);
  --sh-6:12px 16px 0 -6px #d3f0e2;
  --sh-7:0 18px 0 -8px #eab9c6;
  --sh-8:-14px 10px 0 -6px #cfeee0;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--txt);font:16px/1.75 "Microsoft YaHei","PingFang SC",Arial,sans-serif;-webkit-font-smoothing:antialiased}
img{display:block;max-width:100%;height:auto}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
.wrap{max-width:1160px;margin:0 auto;padding:0 28px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}
[id]{scroll-margin-top:84px}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;height:44px;padding:0 22px;border:2px solid transparent;font-size:15px;font-weight:700;line-height:1;cursor:pointer;transition:background .18s,color .18s,border-color .18s,transform .18s}
.btn-lg{height:54px;padding:0 30px;font-size:16.5px}
.btn-main{background:var(--main);color:#fff;border-color:var(--main)}
.btn-main:hover{background:var(--main-d);border-color:var(--main-d);transform:translateY(-2px)}
.btn-line{background:#fff;color:var(--ink);border-color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff;transform:translateY(-2px)}
.btn-outline{background:transparent;color:#fff;border-color:var(--main)}
.btn-outline:hover{background:var(--main);color:#fff;transform:translateY(-2px)}

/* ---------- 顶栏 ---------- */
.fbar{position:sticky;top:0;z-index:60;background:#fff;border-bottom:1px solid var(--line-2)}
.fbar-in{display:flex;align-items:center;gap:26px;height:72px}
.flogo{display:flex;align-items:center;gap:10px;flex:none}
.flogo img{border:1px solid var(--line-2)}
.flogo-t strong{display:block;font-size:19px;line-height:1.2}
.flogo-t small{display:block;font-size:11.5px;color:var(--muted);letter-spacing:.04em}
.fmenu{display:flex;align-items:center;gap:20px;margin-left:6px}
.fmenu a{padding:6px 2px;font-size:15px;color:var(--txt);border-bottom:3px solid transparent}
.fmenu a:hover{color:var(--main-d)}
.fmenu a.on{color:var(--main-d);border-bottom-color:var(--main)}
.fbar-r{display:flex;align-items:center;gap:12px;margin-left:auto;flex:none}
.burger{display:none;width:44px;height:44px;border:1px solid var(--line-2);background:#fff;align-items:center;justify-content:center;flex-direction:column;gap:5px;cursor:pointer;padding:0}
.burger span{display:block;width:20px;height:2px;background:var(--ink)}

/* ---------- 英雄区 ---------- */
.fhero{padding:54px 0 66px}
.fhero-in{display:grid;grid-template-columns:1.06fr .94fr;gap:54px;align-items:center}
.fhero-l{background:#fff;border:1px solid var(--line-2);padding:38px 34px 32px;box-shadow:var(--sh-1)}
.f-kick{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;letter-spacing:.06em;color:var(--muted);text-transform:uppercase}
.f-kick i{font-style:normal;background:var(--main);color:#fff;padding:3px 8px;font-size:12px;letter-spacing:0}
.fhero-l h1{margin:16px 0 16px;font-size:64px;line-height:1.04;letter-spacing:-.01em}
.fhero-lead{font-size:15.5px;line-height:1.95;color:#48524b}
.fhero-acts{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 22px}
.fhero-tags{display:flex;flex-wrap:wrap;gap:9px}
.fhero-tags li{padding:5px 13px;border:1px solid var(--line-2);font-size:13.5px;color:#4a544d}
.fhero-tags li:nth-child(2n){border-color:var(--main);color:var(--main-d)}
.fhero-note{display:flex;align-items:center;gap:9px;margin-top:20px;font-size:13px;color:var(--muted)}
.beat{width:8px;height:8px;background:var(--alt);flex:none}

/* 竖版三屏并排：间距递变、中间略高 */
.fhero-r{display:flex;justify-content:center}
.stack3{display:flex;align-items:flex-end;justify-content:center}
.trip{margin:0;background:#fff;border:2px solid var(--ink);padding:7px}
.trip img{display:block;width:100%;height:auto}
.trip-cap{display:block;margin-bottom:7px;padding:6px 2px;background:var(--ink);color:#fff;font-size:12px;font-weight:700;text-align:center}
.trip-s{width:29%;margin-right:12px}
.trip-m{width:34%;margin-right:20px;margin-bottom:40px;border-color:var(--main)}
.trip-m .trip-cap{background:var(--main)}
.trip-e{width:29%}
.trip-e .trip-cap{background:var(--alt)}

/* ---------- 区块通用 ---------- */
.fsec{padding:64px 0}
.fsec-mist{background:var(--mist)}
.fblock{background:#fff;border:1px solid var(--line-2);padding:38px 34px}
.fblock-flow{box-shadow:var(--sh-2)}
.fblock-feat{background:var(--main-t);box-shadow:var(--sh-3)}
.fblock-gal{box-shadow:var(--sh-4)}
.fblock-voices{background:var(--alt-t);box-shadow:var(--sh-6)}
.fblock-ask{border:2px solid var(--ink);box-shadow:var(--sh-7)}
.fhead{display:flex;align-items:flex-start;gap:18px;margin-bottom:30px}
.fhead-n{flex:none;font-size:32px;font-weight:800;line-height:1;color:var(--ink);border-bottom:4px solid var(--main);padding-bottom:4px}
.fhead h2{font-size:30px;line-height:1.32;margin-bottom:8px}
.fhead p{max-width:780px;font-size:14.5px;color:var(--muted)}

/* ---------- 使用指南：三步 ---------- */
.fsteps{display:grid;grid-template-columns:repeat(3,1fr)}
.fst{padding:0 26px;border-right:1px solid var(--line-2)}
.fst:first-child{padding-left:0}
.fst:last-child{padding-right:0;border-right:0}
.fst-no{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;margin-bottom:14px;background:var(--ink);color:#fff;font-size:18px;font-weight:800}
.fst:nth-child(2) .fst-no{background:var(--main)}
.fst:nth-child(3) .fst-no{background:var(--alt)}
.fst h3{font-size:18px;margin-bottom:8px}
.fst p{font-size:14.5px;line-height:1.9;color:#525c55}

/* ---------- 特色功能：3×2 + 左色条 ---------- */
.ffeat{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
.ff{background:#fff;border:1px solid var(--line-2);border-left:6px solid var(--main);padding:22px 20px}
.ff:nth-child(2n){border-left-color:var(--alt)}
.ff-no{display:block;margin-bottom:8px;font-size:12px;font-weight:800;letter-spacing:.1em;color:var(--main)}
.ff:nth-child(2n) .ff-no{color:var(--alt)}
.ff h3{font-size:17.5px;margin-bottom:9px}
.ff p{font-size:14px;line-height:1.9;color:#525c55}

/* ---------- 界面一览：三屏并排等高 ---------- */
.fgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.fg{margin:0;background:#fff;border:1px solid var(--line-2);padding:8px}
.fg-h{display:flex;justify-content:space-between;margin-bottom:8px;padding:7px 10px;background:var(--ink);color:#fff;font-size:12px;font-weight:700}
.fg-h span:last-child{color:var(--main)}
.fg:nth-child(2n) .fg-h span:last-child{color:var(--alt)}
.fg img{width:100%;max-width:460px;margin:0 auto;height:auto}
.fg figcaption{padding:8px 2px 2px;font-size:12.5px;color:var(--muted);text-align:center}

/* ---------- 数据条：色块拼贴 ---------- */
.fband{padding:10px 0 64px}
.fband-in{display:grid;grid-template-columns:repeat(4,1fr);box-shadow:var(--sh-5)}
.fb{padding:28px 20px;text-align:center;color:#fff}
.fb-a,.fb-c{background:var(--ink)}
.fb-b,.fb-d{background:var(--main);color:var(--ink)}
.fb b{display:block;font-size:34px;font-weight:800;line-height:1}
.fb span{display:block;margin-top:9px;font-size:13.5px;opacity:.92}

/* ---------- 用户评价：两列 + 顶部大引号 ---------- */
.fnotes{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.fn{display:flex;flex-direction:column;background:#fff;border:1px solid var(--line-2);border-top:4px solid var(--alt);padding:18px 22px 16px}
.fn:nth-child(2n){border-top-color:var(--main)}
.fn::before{content:"\201D";display:block;margin-bottom:4px;font:700 46px/.7 Georgia,"Times New Roman",serif;color:var(--alt)}
.fn:nth-child(2n)::before{color:var(--main)}
.fn p{flex:1;font-size:14.5px;line-height:1.95;color:#4a544d}
.fn footer{display:flex;align-items:center;justify-content:space-between;margin-top:14px;padding-top:12px;border-top:1px solid var(--line)}
.fn footer b{font-size:14px}
.fn footer time{font-size:12.5px;color:var(--muted)}

/* ---------- FAQ：单列互斥手风琴 ---------- */
.fask{display:grid}
.fq{border-bottom:1px solid var(--line-2)}
.fq:first-child{border-top:1px solid var(--line-2)}
.fq summary{display:flex;align-items:center;gap:14px;padding:18px 8px;cursor:pointer;list-style:none}
.fq summary::-webkit-details-marker{display:none}
.fq-n{flex:none;display:inline-flex;align-items:center;justify-content:center;width:38px;height:38px;background:var(--main);color:#fff;font-size:13.5px;font-weight:800}
.fq:nth-child(2n) .fq-n{background:var(--alt)}
.fq-t{flex:1;font-size:16.5px;font-weight:700}
.fq-x{position:relative;flex:none;width:16px;height:16px}
.fq-x::before,.fq-x::after{content:"";position:absolute;background:var(--ink)}
.fq-x::before{left:0;top:7px;width:16px;height:2px}
.fq-x::after{left:7px;top:0;width:2px;height:16px;transition:transform .18s}
.fq[open] .fq-x::after{transform:scaleY(0)}
.fq[open]{background:var(--mist)}
.fq-a{padding:0 8px 20px 60px}
.fq-a p{max-width:900px;font-size:14.5px;line-height:1.95;color:#4a544d}

/* ---------- 下载 CTA：深色底 + 描边按钮 ---------- */
.fcta{padding:64px 0 72px}
.fcta-box{background:var(--ink);border-top:6px solid var(--main);padding:52px 40px;text-align:center;box-shadow:var(--sh-8)}
.f-kick-c{color:#9db1a4}
.fcta-box h2{margin:16px 0 14px;font-size:34px;line-height:1.3;color:#fff}
.fcta-p{max-width:680px;margin:0 auto 28px;font-size:15px;line-height:1.95;color:#c7d4cb}
.fcta-note{margin-top:16px;font-size:13px;color:#93a49a}

/* ---------- 页脚 ---------- */
.ffoot{background:var(--mist);border-top:1px solid var(--line-2);padding:48px 0 30px}
.ffoot-grid{display:grid;grid-template-columns:1.7fr 1fr 1fr 1fr;gap:32px}
.ffoot-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.ffoot-logo img{border:1px solid var(--line-2)}
.ffoot-logo b{display:block;font-size:18px;line-height:1.25}
.ffoot-logo p{font-size:12.5px;color:var(--muted)}
.ffoot-note{font-size:13.5px;line-height:1.9;color:#59635c;max-width:420px}
.ffoot-col h4{margin-bottom:12px;font-size:15px}
.ffoot-col li{margin-bottom:9px}
.ffoot-col a{font-size:13.5px;color:#59635c}
.ffoot-col a:hover{color:var(--main-d)}
.ffoot-copy{margin-top:30px;padding-top:18px;border-top:1px solid var(--line);text-align:center;font-size:12.5px;color:var(--muted)}

/* ---------- 返回顶部 ---------- */
.backtop{position:fixed;right:24px;bottom:160px;z-index:99980;width:44px;height:44px;border:0;background:var(--ink);color:#fff;font-size:18px;line-height:1;cursor:pointer;opacity:0;visibility:hidden;transition:opacity .2s,visibility .2s}
.backtop.show{opacity:1;visibility:visible}

/* ---------- 入场动画 ---------- */
.rv{opacity:0;transform:translateY(18px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .fhero-in{grid-template-columns:1fr;gap:38px}
  .fhero-l h1{font-size:56px}
  .fhead h2{font-size:26px}
  .ffoot-grid{grid-template-columns:1fr 1fr}
}

@media (max-width:760px){
  body{font-size:15.5px}
  .wrap{padding:0 16px}
  [id]{scroll-margin-top:72px}
  .fbar-in{height:64px;gap:12px}
  .flogo-t small{display:none}
  .fmenu{position:fixed;left:0;right:0;top:64px;z-index:59;display:none;flex-direction:column;align-items:stretch;gap:0;margin:0;padding:6px 16px 16px;background:#fff;border-bottom:2px solid var(--ink)}
  .fmenu.open{display:flex}
  .fmenu a{padding:12px 2px;border-bottom:1px solid var(--line)}
  .fbar-cta{display:none}
  .burger{display:inline-flex}

  .fhero{padding:30px 0 44px}
  .fhero-l{padding:24px 20px 20px;box-shadow:-12px 10px 0 -6px var(--main-l)}
  .fhero-l h1{font-size:44px}
  .fhero-acts{margin:22px 0 18px}
  .btn-lg{height:48px;padding:0 22px;font-size:15.5px}

  .fsec{padding:44px 0}
  .fblock{padding:26px 18px}
  .fhead{flex-direction:column;gap:10px;margin-bottom:24px}
  .fhead-n{font-size:26px}

  .fsteps{grid-template-columns:1fr}
  .fst{padding:0 0 18px;margin-bottom:18px;border-right:0;border-bottom:1px solid var(--line-2)}
  .fst:last-child{margin-bottom:0;padding-bottom:0;border-bottom:0}

  .ffeat{grid-template-columns:1fr 1fr}

  .fgrid{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;padding-bottom:6px}
  .fg{flex:0 0 74%;scroll-snap-align:center}

  .fband{padding:4px 0 44px}
  .fband-in{grid-template-columns:1fr 1fr}
  .fb{padding:22px 14px}
  .fb b{font-size:28px}

  .fnotes{grid-template-columns:1fr}

  .fq-a{padding:0 8px 18px}
  .fq-t{font-size:15.5px}

  .fcta{padding:44px 0 52px}
  .fcta-box{padding:36px 20px}
  .fcta-box h2{font-size:26px}

  .ffoot{padding:40px 0 26px}
  .ffoot-grid{grid-template-columns:1fr}
  .backtop{right:16px;bottom:150px}
}

@media (max-width:400px){
  .ffeat{grid-template-columns:1fr}
  .fhero-l h1{font-size:38px}
  .fg{flex:0 0 84%}
}

@media (prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .rv{opacity:1;transform:none;transition:none}
  .btn,.fq-x::after,.backtop{transition:none}
}