/* MiraiMind 官方下载站 · 星际轨道骨架（第2组第7站） */

:root{
  --ink:#17142e;
  --brand:#7E83F2;
  --brand-d:#5f64d8;
  --brand-t:#eff0fe;
  --alt:#F29B4D;
  --alt-t:#fdf1e2;
  --paper:#ffffff;
  --mist:#f6f6fc;
  --line:#e4e4f2;
  --line-2:#cfcfe8;
  --txt:#2c2950;
  --muted:#82809e;
}

*{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:transform .18s,box-shadow .18s,background .18s,color .18s}
.btn-lg{height:54px;padding:0 32px;font-size:16.5px}
.btn-pri{background:var(--brand);color:#fff;border-color:var(--brand)}
.btn-pri:hover{background:var(--brand-d);border-color:var(--brand-d);transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--ink)}
.btn-line{background:#fff;color:var(--ink);border-color:var(--ink)}
.btn-line:hover{background:var(--ink);color:#fff;transform:translate(-2px,-2px);box-shadow:4px 4px 0 var(--alt)}

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

/* ---------- 区块头 ---------- */
.sec-h{margin-bottom:34px}
.kick{display:inline-flex;align-items:center;gap:9px;font-size:12.5px;font-weight:700;letter-spacing:.08em;color:var(--muted);text-transform:uppercase}
.kick i{font-style:normal;background:var(--brand);color:#fff;padding:3px 8px;font-size:12px;letter-spacing:0}
.sec-h h2{margin:14px 0 10px;font-size:30px;line-height:1.32}
.sec-sub{max-width:760px;font-size:14.5px;color:var(--muted)}
.kick-light{color:#b9bbf7}
.kick-light i{background:var(--alt);color:var(--ink)}

/* ---------- 英雄区：星际轨道 ---------- */
.mh{padding:60px 0 76px;background:var(--mist);border-bottom:3px solid var(--ink)}
.mh-in{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:center}
.mh-l h1{margin:16px 0;font-size:60px;line-height:1.05;letter-spacing:-.01em}
.lead{font-size:15.5px;line-height:1.95;color:#4c4870}
.mh-acts{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 22px}
.mh-tags{display:flex;flex-wrap:wrap;gap:9px}
.mh-tags li{padding:5px 13px;background:#fff;border:1px solid var(--line-2);border-bottom:4px solid var(--brand);font-size:13.5px;color:#4c4870}
.mh-tags li:nth-child(2n){border-bottom-color:var(--alt)}
.mh-note{display:flex;align-items:center;gap:9px;margin-top:22px;font-size:13px;color:var(--muted)}
.sq{width:8px;height:8px;background:var(--alt);flex:none}

.mh-r{display:flex;justify-content:center}
.orbit{position:relative;width:470px;height:470px;flex:none}
.ob-ring{position:absolute;inset:52px;border:2px solid var(--brand);transform:rotate(45deg)}
.ob-ring::before{content:"";position:absolute;inset:18px;border:1px dashed var(--line-2)}
.ob-core{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);z-index:2;background:#fff;border:2px solid var(--ink);box-shadow:-12px -12px 0 var(--alt);padding:18px 22px;text-align:center}
.ob-core img{margin:0 auto 8px;border:2px solid var(--brand)}
.ob-core b{font-size:14px;letter-spacing:.08em}
.ob-shot{position:absolute;margin:0;background:#fff;padding:6px}
.ob-shot img{width:100%;height:auto}
.ob-s1{width:158px;left:0;top:32px;border:2px solid var(--ink);z-index:1}
.ob-s2{width:132px;right:6px;bottom:26px;border:2px solid var(--brand);z-index:1}
.ob-tag{position:absolute;z-index:2;padding:7px 12px;font-size:11.5px;line-height:1.4;border:2px solid var(--ink)}
.ob-tag b{display:block;font-size:15px}
.ob-t1{top:0;right:66px;background:var(--brand);color:#fff}
.ob-t2{left:44px;bottom:6px;background:var(--alt);color:var(--ink)}
.ob-t3{right:-6px;top:206px;background:var(--ink);color:#fff}

/* ---------- 特色：3×2 线框大编号 ---------- */
.feat2{padding:66px 0}
.grid6{display:grid;grid-template-columns:repeat(3,1fr);background:#fff;border:2px solid var(--ink);box-shadow:12px 12px 0 var(--ink)}
.g6{padding:28px 26px;border:1px solid var(--line)}
.g6-no{display:block;margin-bottom:12px;font-size:34px;font-weight:800;line-height:1;color:var(--brand)}
.g6:nth-child(2n) .g6-no{color:var(--alt)}
.g6 h3{font-size:17.5px;margin-bottom:9px}
.g6 p{font-size:14px;line-height:1.9;color:#4c4870}

/* ---------- 答疑：左列表右面板 ---------- */
.ask2{padding:0 0 70px}
.askx{display:grid;grid-template-columns:380px 1fr;background:#fff;border:2px solid var(--ink);box-shadow:0 14px 0 var(--alt)}
.ax-list{border-right:2px solid var(--ink)}
.ax-q{display:flex;align-items:center;gap:14px;width:100%;padding:18px 20px;background:#fff;border:0;border-bottom:1px solid var(--line);text-align:left;font:inherit;font-size:15px;font-weight:700;color:var(--txt);cursor:pointer;transition:background .15s}
.ax-q span{flex:none;display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;background:var(--brand-t);color:var(--brand-d);font-size:13px;font-weight:800}
.ax-q:hover{background:var(--mist)}
.ax-q.on{background:var(--brand);color:#fff}
.ax-q.on span{background:var(--ink);color:var(--alt)}
.ax-panels{padding:34px 36px}
.ax-a[hidden]{display:none}
.ax-a h3{margin-bottom:12px;font-size:21px;color:var(--brand-d)}
.ax-a p{font-size:14.5px;line-height:2;color:#4c4870;max-width:640px}

/* ---------- 界面：chip 过滤 ---------- */
.gal2{padding:0 0 72px}
.chips{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:22px}
.chip{height:38px;padding:0 20px;background:#fff;border:2px solid var(--ink);font-size:14px;font-weight:700;color:var(--txt);cursor:pointer;transition:background .15s,color .15s}
.chip:hover{border-color:var(--brand);color:var(--brand-d)}
.chip.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.gx{display:grid;grid-template-columns:repeat(6,1fr);gap:16px;background:var(--brand-t);border:2px solid var(--ink);box-shadow:-14px 10px 0 var(--brand);padding:22px}
.gx-f{position:relative;margin:0;background:#fff;padding:8px;border:2px solid var(--ink)}
.gx-f[hidden]{display:none}
.gx-f img{width:100%;max-width:340px;margin:0 auto;height:auto}
.gx-f:nth-child(-n+3){grid-column:span 2}
.gx-f:nth-child(n+4){grid-column:span 3}
.gx-no{position:absolute;top:-12px;left:10px;background:var(--brand);color:#fff;padding:2px 8px;font-size:11.5px;font-weight:800}
.gx-f:nth-child(2n) .gx-no{background:var(--alt);color:var(--ink)}
.gx-f figcaption{padding:8px 2px 2px;font-size:12.5px;color:var(--muted);text-align:center}

/* ---------- 数据条 ---------- */
.band2{background:var(--ink);padding:0}
.bandx{max-width:1160px;margin:0 auto;display:grid;grid-template-columns:repeat(4,1fr)}
.bdx-i{padding:30px 18px;text-align:center;border-left:1px solid #2f2b52}
.bdx-i:first-child{border-left:0}
.bdx-i b{display:block;font-size:34px;font-weight:800;line-height:1;color:var(--alt)}
.bdx-i:nth-child(2n) b{color:var(--brand)}
.bdx-i span{display:block;margin-top:9px;font-size:13.5px;color:#b9bbf7}

/* ---------- 指南：横向三步 ---------- */
.flow2{padding:66px 0}
.fx{display:grid;grid-template-columns:repeat(3,1fr);gap:0;background:#fff;border:2px solid var(--ink);box-shadow:16px -8px 0 var(--brand)}
.fx-s{padding:30px 28px;border-right:2px solid var(--ink)}
.fx-s:last-child{border-right:0}
.fx-no{display:inline-block;margin-bottom:14px;padding:4px 10px;background:var(--ink);color:var(--alt);font-size:12px;font-weight:800;letter-spacing:.12em}
.fx-s:nth-child(2) .fx-no{background:var(--brand);color:#fff}
.fx-s:nth-child(3) .fx-no{background:var(--alt);color:var(--ink)}
.fx-s h3{font-size:18px;margin-bottom:9px}
.fx-s p{font-size:14px;line-height:1.9;color:#4c4870}

/* ---------- 用户说：双列错位瀑布 ---------- */
.vox{padding:0 0 72px}
.vx{display:grid;grid-template-columns:1fr 1fr;gap:20px;background:var(--mist);border:2px solid var(--ink);box-shadow:-16px 6px 0 var(--ink);padding:26px}
.vx-c{display:grid;gap:20px;align-content:start}
.vx-c2{margin-top:44px}
.vx-i{background:#fff;border:1px solid var(--line-2);border-left:6px solid var(--brand);padding:20px 24px 16px}
.vx-c2 .vx-i{border-left-color:var(--alt)}
.vx-i p{font-size:14.5px;line-height:1.95;color:#3f3a63}
.vx-i footer{display:flex;align-items:center;justify-content:space-between;margin-top:13px;padding-top:11px;border-top:1px dashed var(--line-2)}
.vx-i footer b{font-size:14px}
.vx-i footer time{font-size:12.5px;color:var(--muted)}

/* ---------- 下载 CTA ---------- */
.fin{padding:0 0 76px}
.fin-box{display:grid;grid-template-columns:1.15fr .85fr;gap:44px;align-items:center;background:var(--ink);box-shadow:10px 16px 0 var(--alt);padding:48px 44px}
.fin-l h2{margin:14px 0 0;font-size:40px;line-height:1.32;color:#fff}
.fin-p{font-size:15px;line-height:1.95;color:#c3c5ec}
.fin-r .btn{margin-top:24px}
.fin-note{margin-top:16px;font-size:13px;color:#8f91bd}

/* ---------- 页脚 ---------- */
.btm{background:var(--ink);border-top:3px solid var(--alt);padding:36px 0 30px;color:#c3c5ec}
.btm-in{text-align:center}
.btm-brand{display:inline-flex;align-items:center;gap:10px;margin-bottom:16px;font-size:16px;font-weight:700;color:#fff}
.btm-brand img{border:2px solid var(--alt)}
.btm-nav{display:flex;flex-wrap:wrap;justify-content:center;gap:8px 22px;margin-bottom:18px}
.btm-nav a{font-size:13.5px;color:#c3c5ec;border-bottom:2px solid transparent}
.btm-nav a:hover{color:var(--alt);border-bottom-color:var(--alt)}
.btm-icp{margin-bottom:6px;font-size:12.5px;color:#8f91bd}
.btm-c{font-size:12.5px;color:#8f91bd}

/* ---------- 返回顶部 ---------- */
.backtop{position:fixed;right:24px;bottom:160px;z-index:99980;width:44px;height:44px;border:2px solid var(--ink);background:var(--alt);color:var(--ink);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){
  .mh-in{grid-template-columns:1fr;gap:48px}
  .mh-l h1{font-size:50px}
  .grid6{grid-template-columns:1fr 1fr}
  .askx{grid-template-columns:1fr}
  .ax-list{border-right:0;border-bottom:2px solid var(--ink)}
  .fin-box{grid-template-columns:1fr;gap:26px;padding:40px 30px}
  .fin-l h2{font-size:32px}
}

@media (max-width:760px){
  body{font-size:15.5px}
  .wrap{padding:0 16px}
  [id]{scroll-margin-top:72px}
  .top-in{height:64px;gap:12px}
  .logo-t small{display:none}
  .menu{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:3px solid var(--brand)}
  .menu.open{display:flex}
  .menu a{padding:12px 2px;border-bottom:1px solid var(--line)}
  .top-cta{display:none}
  .burger{display:inline-flex}

  .mh{padding:34px 0 52px}
  .mh-l h1{font-size:40px}
  .btn-lg{height:48px;padding:0 22px;font-size:15.5px}
  .orbit{width:330px;height:330px}
  .ob-ring{inset:38px}
  .ob-core{padding:12px 14px}
  .ob-core img{width:52px;height:52px}
  .ob-s1{width:110px;top:22px}
  .ob-s2{width:92px;bottom:16px}
  .ob-t1{right:40px}
  .ob-t2{left:24px}
  .ob-t3{top:150px}

  .sec-h{margin-bottom:26px}
  .sec-h h2{font-size:25px}

  .feat2,.flow2{padding:48px 0}
  .grid6{grid-template-columns:1fr;box-shadow:8px 8px 0 var(--ink)}
  .g6{padding:22px 20px}

  .ask2,.gal2,.vox{padding-bottom:48px}
  .askx{box-shadow:0 8px 0 var(--alt)}
  .ax-panels{padding:22px 18px}

  .gx{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch;padding:18px;box-shadow:-10px 8px 0 var(--brand)}
  .gx-f{flex:0 0 64%;scroll-snap-align:center}

  .bandx{grid-template-columns:1fr 1fr}
  .bdx-i{padding:22px 14px;border-left:0}
  .bdx-i:nth-child(2n){border-left:1px solid #2f2b52}
  .bdx-i:nth-child(n+3){border-top:1px solid #2f2b52}
  .bdx-i b{font-size:28px}

  .fx{grid-template-columns:1fr;box-shadow:10px -6px 0 var(--brand)}
  .fx-s{border-right:0;border-bottom:2px solid var(--ink)}
  .fx-s:last-child{border-bottom:0}

  .vx{grid-template-columns:1fr;box-shadow:-10px 6px 0 var(--ink);padding:18px}
  .vx-c2{margin-top:0}

  .fin{padding-bottom:52px}
  .fin-box{padding:32px 20px;box-shadow:8px 10px 0 var(--alt)}

  .backtop{right:16px;bottom:150px}
}

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