/* AI风月 (aixfengyue.cn) - 26-10-15 第4站 独立骨架：画框陈列英雄区 / 3列等高6卡(细线分隔) / 3列评价网格 / 3大1窄画框阵列 / 双列问签 / 左右交错四步 / 居中浅底下载卡 */
:root{
  --ink:#171512;
  --ink-2:#100f0d;
  --paper:#ffffff;
  --tr:#fdeeeb;
  --tr2:#f6cdc4;
  --tt:#e8f6f3;
  --main:#e8442a;
  --main-d:#c9341a;
  --alt:#12a594;
  --alt-d:#0d8375;
  --line:#ecdcd6;
  --line-2:#dcc8c1;
  --line-t:#c8e5df;
  --muted:#6f665f;
  --text:#241f1c;
  --sh-1:-14px -12px 0 0 #f7d6cf;
  --sh-2:0 12px 0 -4px #cfece7;
  --sh-3:14px 14px 0 -6px #f7dcd6;
  --sh-4:-12px 12px 0 -8px #d6efe9;
  --sh-5:12px -12px 0 -6px #fae0da;
  --sh-6:0 18px 0 -8px #f0d2cb;
  --sh-7:-14px -14px 0 -8px #cdeae4;
  --sh-8:0 14px 0 -6px #f2d0c9;
}
*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--paper);color:var(--text);font:16px/1.85 "Microsoft YaHei","PingFang SC","Hiragino Sans GB",Arial,sans-serif;overflow-x:hidden}
img{max-width:100%;height:auto;display:block;border:0;border-radius:0}
a{color:inherit;text-decoration:none}
ul,ol{margin:0;padding:0;list-style:none}
h1,h2,h3,h4,p{margin:0}
button{font:inherit;border:0;background:none;cursor:pointer;border-radius:0}
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.wrap{width:100%;max-width:1140px;margin:0 auto;padding:0 22px}
[id]{scroll-margin-top:84px}

.btn{display:inline-flex;align-items:center;justify-content:center;height:50px;padding:0 26px;font-size:15px;font-weight:700;border:2px solid var(--ink);border-radius:0;transition:transform .16s ease,background .16s ease,color .16s ease}
.btn-lg{height:56px;padding:0 32px;font-size:16px}
.btn-main{background:var(--main);border-color:var(--main);color:#fff}
.btn-main:hover{background:var(--main-d);border-color:var(--main-d);transform:translate(-2px,-2px)}
.btn-ghost{background:transparent;color:var(--ink)}
.btn-ghost:hover{background:var(--ink);color:#fff;transform:translate(-2px,-2px)}

/* 顶栏 */
.abar{position:sticky;top:0;z-index:80;background:rgba(255,255,255,.96);border-bottom:1px solid var(--line-2);backdrop-filter:blur(6px)}
.abar-in{display:flex;align-items:center;gap:20px;height:68px}
.alog{display:flex;align-items:center;gap:10px;flex:none}
.alog img{width:40px;height:40px;border:1px solid var(--line-2)}
.alog-t{display:flex;flex-direction:column;line-height:1.2}
.alog-t strong{font-size:18px}
.alog-t small{font-size:11px;color:var(--muted);letter-spacing:.06em}
.amenu{display:flex;align-items:center;gap:4px;margin-left:auto}
.amenu a{padding:8px 12px;font-size:14.5px;color:#584d47}
.amenu a:hover{color:var(--main)}
.amenu a.on{color:var(--main);font-weight:700;border-bottom:3px solid var(--main)}
.abar-r{display:flex;align-items:center;gap:12px;flex:none}
.abar-cta{height:42px;padding:0 20px;font-size:14px}
.burger{display:none;width:44px;height:44px;border:2px solid var(--ink);flex-direction:column;justify-content:center;align-items:center;gap:5px}
.burger span{display:block;width:20px;height:2px;background:var(--ink)}

/* 英雄区 */
.ahero{background:var(--tr);padding:56px 0 62px;border-bottom:1px solid var(--line-2)}
.ahero-in{display:grid;grid-template-columns:1fr 1fr;gap:46px;align-items:center}
.ahero-l{background:#fff;border:1px solid var(--line-2);border-top:6px solid var(--main);padding:32px 30px 28px;box-shadow:var(--sh-1)}
.a-kick{display:flex;align-items:center;gap:9px;font-size:13px;letter-spacing:.12em;color:var(--muted)}
.a-kn{display:inline-grid;place-items:center;width:28px;height:22px;background:var(--main);color:#fff;font-size:12px;font-weight:800;letter-spacing:0}
.a-kick-c{justify-content:center}
.ahero-l h1{margin:16px 0 12px;font-size:72px;line-height:1;font-weight:900;color:var(--ink);letter-spacing:-.02em}
.ahero-lead{font-size:16.5px;line-height:1.95;color:#4f463f;max-width:560px}
.ahero-acts{display:flex;flex-wrap:wrap;gap:14px;margin:26px 0 20px}
.ahero-tags{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:18px}
.ahero-tags li{font-size:13.5px;padding:6px 14px;border:1px solid var(--main);color:var(--main);background:rgba(232,68,42,.06)}
.ahero-note{display:flex;align-items:center;gap:9px;font-size:13.5px;color:var(--muted);border-top:1px dashed var(--line-2);padding-top:14px;max-width:520px}
.beat{width:9px;height:9px;background:var(--alt);flex:none}

/* 画框陈列英雄图 */
.framewrap{display:flex;flex-direction:column;align-items:center;gap:16px}
.frame{position:relative;background:#fff;border:2px solid var(--ink);padding:14px;box-shadow:var(--sh-1)}
.frame-mat{border:1px solid var(--line-2);padding:10px;background:var(--tr)}
.frame-mat img{width:100%;max-width:535px;height:auto;margin:0 auto}
.frame-plate{position:absolute;left:-12px;top:22px;z-index:3;background:var(--alt);color:#fff;font-size:12.5px;font-weight:800;letter-spacing:.06em;padding:7px 14px}
.frame-cap{font-size:13px;color:var(--muted);letter-spacing:.04em}

/* 数据条 */
.aband{background:var(--ink);padding:0}
.aband-in{display:grid;grid-template-columns:repeat(4,1fr);background:var(--ink-2);box-shadow:var(--sh-2)}
.bd{padding:30px 16px;text-align:center;border-right:1px solid #33302b}
.bd:last-child{border-right:0}
.bd b{display:block;font-size:40px;line-height:1.1;font-weight:900;color:#7fd6c8}
.bd span{font-size:13.5px;color:#c0b7ae;letter-spacing:.08em}

/* 区块与区块头 */
.ablock{padding:74px 0}
.ablock-a{background:var(--paper)}
.ablock-b{background:var(--tt)}
.ablock-c{background:var(--paper)}
.ablock-d{background:var(--tr)}
.ablock-e{background:var(--paper);border-top:3px solid var(--alt)}
.ahead{display:grid;grid-template-columns:auto 1fr;gap:20px;align-items:start;margin-bottom:34px;padding-bottom:16px;border-bottom:1px solid var(--line-2)}
.ablock-b .ahead{border-bottom:2px solid var(--alt-d)}
.ablock-d .ahead{border-bottom:3px solid var(--main)}
.ahead-n{display:inline-grid;place-items:center;width:44px;height:44px;background:var(--main);color:#fff;font-size:18px;font-weight:900}
.ablock-b .ahead-n{background:var(--alt)}
.ahead h2{font-size:29px;line-height:1.3;font-weight:900;color:var(--ink)}
.ahead-p{margin-top:8px;font-size:14.5px;color:var(--muted);line-height:1.8;max-width:700px}

/* 3 列等高 6 卡（1px 细线分隔，无独立边框） */
.afeat{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;background:var(--line-2);border:1px solid var(--line-2);box-shadow:var(--sh-3)}
.af{position:relative;background:#fff;padding:28px 22px}
.af-no{position:absolute;right:18px;top:16px;font-size:30px;font-weight:900;color:var(--tr2);letter-spacing:-.02em}
.af h3{font-size:18.5px;font-weight:800;color:var(--ink);padding-bottom:10px;border-bottom:2px solid var(--main)}
.af:nth-child(3n) h3{border-bottom-color:var(--alt)}
.af p{margin-top:12px;font-size:14.5px;line-height:1.85;color:#514840}

/* 3 列评价网格 */
.awall{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;background:#fff;border:1px solid var(--line-t);padding:20px;box-shadow:var(--sh-4)}
.aw{border:1px solid var(--line);border-bottom:4px solid var(--alt);padding:20px;display:flex;flex-direction:column}
.aw:nth-child(2n){border-bottom-color:var(--main)}
.aw p{font-size:14.5px;line-height:1.9;color:#474039;flex:1}
.aw footer{display:flex;flex-direction:column;gap:4px;margin-top:14px;padding-top:12px;border-top:1px dashed var(--line-2)}
.aw footer b{font-size:13.5px;color:var(--main)}
.aw footer time{font-size:12.5px;color:var(--muted);letter-spacing:.04em}

/* 3大1窄画框阵列 */
.aframes{display:grid;grid-template-columns:1fr 1fr 1fr .62fr;gap:18px;background:#fff;border:1px solid var(--line-2);padding:20px;box-shadow:var(--sh-5)}
.afw{position:relative;margin:0;border:2px solid var(--ink);background:#fff;padding:8px}
.afw-slim{border-color:var(--alt)}
.afw-plate{display:block;text-align:center;background:var(--ink);color:#fff;font-size:12.5px;font-weight:700;padding:7px 8px;margin-bottom:8px}
.afw-slim .afw-plate{background:var(--alt)}
.afw-mat{border:1px solid var(--line-2);padding:6px;background:var(--tr)}
.afw-slim .afw-mat{background:var(--tt)}
.afw img{width:100%;height:auto;margin:0 auto}
.aframes-tip{margin-top:18px;text-align:center;font-size:13px;color:var(--muted)}

/* 双列问签 */
.aask{display:grid;grid-template-columns:1fr 1fr;gap:14px;background:#fff;border:1px solid var(--line-2);padding:18px;box-shadow:var(--sh-6)}
.aq{border:1px solid var(--line);border-left:5px solid var(--main);align-self:start}
.aq:nth-child(2n){border-left-color:var(--alt)}
.aq[open]{background:var(--tr)}
.aq summary{display:flex;align-items:center;gap:12px;padding:16px 18px;cursor:pointer;list-style:none}
.aq summary::-webkit-details-marker{display:none}
.aq-bar{flex:none;width:4px;height:18px;background:var(--main)}
.aq:nth-child(2n) .aq-bar{background:var(--alt)}
.aq-t{flex:1;font-size:15.5px;font-weight:700;color:var(--ink)}
.aq-ic{flex:none;width:10px;height:10px;border-right:2px solid var(--muted);border-bottom:2px solid var(--muted);transform:rotate(45deg);transition:transform .2s ease}
.aq[open] .aq-ic{transform:rotate(225deg)}
.aq-a{padding:0 18px 18px 34px}
.aq-a p{font-size:14.5px;line-height:1.9;color:#4a433c;padding-top:12px;border-top:1px solid var(--line)}

/* 左右交错四步 */
.aflow{position:relative;padding:8px 0}
.aflow::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:1px;background:var(--line-2)}
.afs{position:relative;width:calc(50% - 30px);display:flex;gap:16px;background:#fff;border:1px solid var(--line-2);padding:22px;margin-bottom:20px}
.afs:last-child{margin-bottom:0}
.afs-l{margin-right:auto;box-shadow:var(--sh-7)}
.afs-r{margin-left:auto;box-shadow:-12px -12px 0 -8px #f7dcd6}
.afs-no{flex:none;display:inline-grid;place-items:center;width:46px;height:46px;background:var(--main);color:#fff;font-size:15px;font-weight:900;border:2px solid var(--ink)}
.afs-r .afs-no{background:var(--alt)}
.afs h3{font-size:18px;font-weight:800;color:var(--ink)}
.afs h3::after{content:"";display:block;width:40px;height:2px;background:var(--alt);margin:8px 0 10px}
.afs p{font-size:14.5px;line-height:1.85;color:#514840}

/* 居中浅底下载卡 */
.acta{background:var(--tr);padding:70px 22px}
.acta-card{max-width:700px;margin:0 auto;background:#fff;border:1px solid var(--line-2);border-top:6px solid var(--main);padding:44px 36px 36px;text-align:center;box-shadow:var(--sh-8)}
.acta-card h2{margin:14px 0 12px;font-size:30px;font-weight:900;color:var(--ink)}
.acta-p{font-size:14.5px;line-height:1.9;color:#514840;max-width:540px;margin:0 auto 24px}
.acta-note{margin-top:16px;font-size:12.5px;color:var(--muted);letter-spacing:.04em}

/* 页脚（深底，与浅底下载卡对比） */
.afoot{background:var(--ink);padding:54px 0 28px}
.afoot-grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:30px}
.afoot-logo{display:flex;align-items:center;gap:10px;margin-bottom:14px}
.afoot-logo img{width:36px;height:36px;border:1px solid #3a3630}
.afoot-logo b{font-size:17px;color:#fff}
.afoot-logo p{font-size:12px;color:#9b938a}
.afoot-note{font-size:13.5px;line-height:1.85;color:#b3aaa1;max-width:400px}
.afoot-col h4{font-size:14px;color:#fff;margin-bottom:14px;padding-bottom:8px;border-bottom:2px solid var(--main)}
.afoot-col li{margin-bottom:9px}
.afoot-col a{font-size:13.5px;color:#b3aaa1}
.afoot-col a:hover{color:#7fd6c8}
.afoot-copy{margin-top:32px;padding-top:20px;border-top:1px solid #37332d;text-align:center}
.afoot-copy p{font-size:12.5px;color:#9b938a;line-height:1.9}

/* 悬浮按钮 */
.backtop{position:fixed;right:24px;bottom:160px;z-index:99989;width:46px;height:46px;display:grid;place-items:center;background:var(--main);color:#fff;font-size:19px;border:2px solid var(--main);opacity:0;visibility:hidden;transform:translateY(8px);transition:opacity .2s ease,transform .2s ease}
.backtop.show{opacity:1;visibility:visible;transform:translateY(0)}
.backtop:hover{background:var(--alt);border-color:var(--alt)}

.rv{opacity:0;transform:translateY(20px);transition:opacity .6s ease,transform .6s ease}
.rv.in{opacity:1;transform:none}

@media (max-width:980px){
  .ahero-in{grid-template-columns:1fr;gap:36px}
  .ahero-l{padding:26px 22px 22px;box-shadow:14px -10px 0 0 #f7d6cf}
  .ahero-l h1{font-size:54px}
  .awall{grid-template-columns:repeat(2,1fr)}
  .afeat{grid-template-columns:repeat(2,1fr)}
  .afoot-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  body{font-size:15.5px}
  .wrap{padding:0 16px}
  [id]{scroll-margin-top:72px}
  .amenu{position:absolute;left:0;right:0;top:68px;flex-direction:column;align-items:stretch;background:#fff;border-bottom:3px solid var(--main);display:none;padding:6px 0}
  .amenu.open{display:flex}
  .amenu a{padding:14px 20px;font-size:16px;border-bottom:1px solid var(--line);border-bottom-width:1px}
  .amenu a.on{border-bottom-color:var(--line);background:var(--tr)}
  .burger{display:flex}
  .abar-cta{display:none}
  .ahero{padding:34px 0 42px}
  .ahero-l h1{font-size:44px}
  .ahero-lead{font-size:15.5px;line-height:1.9}
  .ahero-acts{gap:10px}
  .btn-lg{height:50px;padding:0 22px;font-size:15px}
  .frame{padding:10px}
  .frame-plate{position:static;display:inline-block;margin:12px auto 0}
  .framewrap{gap:10px}
  .aband-in{grid-template-columns:repeat(2,1fr)}
  .bd{border-right:0;border-bottom:1px solid #33302b;padding:22px 12px}
  .bd b{font-size:32px}
  .ablock{padding:50px 0}
  .ahead{grid-template-columns:auto 1fr;gap:14px;margin-bottom:24px}
  .ahead-n{width:36px;height:36px;font-size:15px}
  .ahead h2{font-size:22px}
  .afeat{grid-template-columns:1fr;box-shadow:10px 10px 0 -6px #f7dcd6}
  .awall{grid-template-columns:1fr;padding:14px;box-shadow:-10px 10px 0 -8px #d6efe9}
  .aframes{display:flex;overflow-x:auto;scroll-snap-type:x mandatory;gap:14px;padding:14px;box-shadow:10px -10px 0 -6px #fae0da;-webkit-overflow-scrolling:touch}
  .afw{flex:0 0 68%;scroll-snap-align:center}
  .afw-slim{flex:0 0 52%}
  .aask{grid-template-columns:1fr;padding:12px;box-shadow:0 14px 0 -8px #f0d2cb}
  .aq summary{padding:14px;gap:10px}
  .aq-t{font-size:15px}
  .aq-a{padding:0 14px 16px 28px}
  .aflow::before{display:none}
  .afs{width:100%;margin-left:0;margin-right:0;padding:18px;gap:12px}
  .afs-l,.afs-r{box-shadow:-10px 10px 0 -8px #f7dcd6}
  .afs-no{width:40px;height:40px;font-size:14px}
  .acta{padding:52px 16px}
  .acta-card{padding:32px 20px 28px;box-shadow:0 12px 0 -6px #f2d0c9}
  .acta-card h2{font-size:24px}
  .afoot-grid{grid-template-columns:1fr;gap:24px}
  .afoot-note{max-width:none}
  .backtop{right:16px;bottom:150px;width:42px;height:42px;font-size:17px}
}
@media (max-width:400px){
  .ahero-l h1{font-size:38px}
  .afw{flex:0 0 78%}
}
@media (prefers-reduced-motion:reduce){
  .rv{opacity:1;transform:none;transition:none}
  .btn{transition:none}
  .aq-ic{transition:none}
}