/* ===== AU教程合集 · 深色主题 ===== */
*{box-sizing:border-box}
html,body{margin:0;padding:0}
body{
  background:#0d0d14;
  color:#e9e9f2;
  font:14px/1.7 system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
  min-height:100vh;
}
img{max-width:100%;height:auto}
a{color:#a78bfa;text-decoration:none}
a:hover{color:#f0abfc}

/* 顶栏 */
.nav{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:14px;flex-wrap:wrap;
  padding:12px 18px;
  background:rgba(13,13,20,.92);
  border-bottom:1px solid rgba(255,255,255,.07);
  backdrop-filter:blur(10px);
}
.nav .brand{font-weight:700;font-size:16px;background:linear-gradient(135deg,#a78bfa,#f0abfc);-webkit-background-clip:text;background-clip:text;color:transparent}
.nav .links{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.nav .links a{padding:7px 12px;border-radius:9px;color:#b9b9cc;font-size:14px;white-space:nowrap}
.nav .links a:hover,.nav .links a.on{background:rgba(124,92,255,.16);color:#fff}
.nav .right{margin-left:auto;display:flex;align-items:center;gap:10px;font-size:13px;color:#9090a8;flex-wrap:wrap}

/* 容器 */
.wrap{max-width:1100px;margin:0 auto;padding:20px 16px 120px}

/* Hero */
.hero{text-align:center;padding:38px 16px 26px}
.hero h1{
  margin:0 0 10px;font-size:34px;font-weight:800;
  background:linear-gradient(135deg,#a78bfa,#f0abfc 60%,#7dd3fc);
  -webkit-background-clip:text;background-clip:text;color:transparent;
}
.hero p{margin:0;color:#9090a8;font-size:14px}

/* 区块 */
.sec{
  background:#15151f;border:1px solid rgba(255,255,255,.06);
  border-radius:16px;padding:18px;margin-bottom:18px;
}
.sec h2{margin:0 0 14px;font-size:18px;display:flex;align-items:center;gap:8px}
.sec h2::before{content:"";width:4px;height:18px;border-radius:2px;background:linear-gradient(180deg,#7c5cff,#a855f7)}
.sec h3{margin:16px 0 10px;font-size:15px;color:#c4c4d8}

/* 商品网格 */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.card{
  background:#12121c;border:1px solid rgba(255,255,255,.07);
  border-radius:14px;padding:16px;
  transition:transform .18s,border-color .18s;
}
.card:hover{transform:translateY(-3px);border-color:rgba(124,92,255,.4)}
.card .nm{font-weight:700;font-size:16px;margin-bottom:4px}
.card .grp{font-size:12px;color:#6b6b85;margin-bottom:12px}

/* 价格行 */
.tier{margin-bottom:10px}
.tier .th{font-size:12px;color:#9090a8;margin-bottom:5px;display:flex;align-items:center;gap:6px}
.tier .th b{color:#c4c4d8;font-weight:600}
.tv{display:flex;justify-content:space-between;align-items:center;padding:5px 9px;border-radius:8px;background:rgba(255,255,255,.03);margin-bottom:4px;font-size:13px}
.tv span{color:#9090a8}
.tv b{font-variant-numeric:tabular-nums}
.tv.cost b{color:#6ee7b7}
.tv.supreme b{color:#f0abfc}
.tv.official b{color:#7dd3fc}
.tv.na b{color:#4a4a5a}

/* 按钮 */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:10px 16px;border:0;border-radius:10px;cursor:pointer;
  background:linear-gradient(135deg,#6d5cff,#8b5cf6);
  color:#fff;font-size:14px;font-weight:600;
  transition:opacity .15s,transform .1s;
}
.btn:hover{opacity:.9}
.btn:active{transform:scale(.98)}
.btn:disabled{opacity:.45;cursor:not-allowed}
.btn.gh{background:#2a2a3a;color:#e9e9f2}
.btn.gh:hover{background:#35354a}
.btn.sm{padding:6px 11px;font-size:12px;border-radius:8px}
.btn.dg{background:linear-gradient(135deg,#ef4444,#b91c1c)}
.btn.full{width:100%}

/* 表单 */
.fld{margin-bottom:12px}
.fld label{display:block;font-size:12px;color:#9090a8;margin-bottom:5px}
input,select,textarea{
  width:100%;padding:10px 12px;border-radius:10px;
  background:#1e1e2a;border:1px solid rgba(255,255,255,.1);
  color:#e9e9f2;font-size:14px;font-family:inherit;outline:none;
}
input:focus,select:focus,textarea:focus{border-color:rgba(124,92,255,.6)}
textarea{min-height:130px;resize:vertical;line-height:1.7}

/* 行/列表 */
.row{
  display:flex;align-items:center;gap:10px;flex-wrap:wrap;
  padding:12px;border-radius:12px;background:rgba(255,255,255,.03);
  border:1px solid rgba(255,255,255,.06);margin-bottom:10px;
}
.row .grow{flex:1;min-width:150px}
.pill{display:inline-block;padding:2px 9px;border-radius:999px;background:rgba(124,92,255,.2);color:#c4b5fd;font-size:12px}
.muted{color:#6b6b85;font-size:12px}
.empty{text-align:center;color:#6b6b85;padding:30px 10px}

/* 状态 */
.st-pass{color:#6ee7b7}
.st-wait{color:#fca5a5}
.st-ship{color:#7dd3fc}

/* 后台布局 */
.shell{display:flex;min-height:100vh}
.side{
  width:190px;flex:0 0 190px;
  background:#101018;border-right:1px solid rgba(255,255,255,.07);
  padding:16px 10px;position:sticky;top:0;height:100vh;overflow:auto;
}
.side .logo{font-weight:700;font-size:15px;padding:8px 10px 14px;color:#a78bfa}
.side a{
  display:block;padding:9px 12px;border-radius:9px;
  color:#b9b9cc;font-size:14px;margin-bottom:3px;cursor:pointer;
}
.side a:hover{background:rgba(255,255,255,.05);color:#fff}
.side a.on{background:linear-gradient(135deg,rgba(109,92,255,.35),rgba(168,85,247,.25));color:#fff}
.main{flex:1;min-width:0;padding:20px 18px 100px;max-width:100%}
.main h2.tt{margin:0 0 16px;font-size:20px}

/* 模态 */
.mask{
  position:fixed;inset:0;background:rgba(0,0,0,.6);z-index:200;
  display:flex;align-items:center;justify-content:center;padding:16px;
}
.modal{
  width:100%;max-width:460px;max-height:86vh;overflow:auto;
  background:#15151f;border:1px solid rgba(124,92,255,.3);border-radius:16px;padding:20px;
}
.modal h3{margin:0 0 14px;font-size:17px;display:flex;justify-content:space-between;align-items:center}
.modal h3 .x{cursor:pointer;color:#9090a8;font-size:20px;line-height:1}
.modal .acts{display:flex;gap:8px;justify-content:flex-end;margin-top:16px}

/* Toast */
#toast{
  position:fixed;left:50%;bottom:90px;transform:translateX(-50%);
  background:rgba(21,21,31,.96);border:1px solid rgba(124,92,255,.35);
  color:#e9e9f2;padding:10px 18px;border-radius:999px;font-size:13px;
  z-index:999;opacity:0;pointer-events:none;transition:opacity .2s;
}
#toast.show{opacity:1}

/* 教程阅读 */
.doc{max-width:820px;margin:0 auto}
.doc .body{line-height:1.9;font-size:15px;color:#dcdcec}
.doc .body h2{font-size:20px;margin:20px 0 10px;color:#fff}
.doc .body h3{font-size:17px;margin:16px 0 8px;color:#fff}
.doc .body p{margin:0 0 12px}
.doc .body img{border-radius:10px;margin:10px 0}
.doc .body pre{background:#1e1e2a;padding:12px;border-radius:10px;overflow:auto}
.doc .body code{background:#23233a;padding:2px 6px;border-radius:5px;font-size:13px}
.doc .body ul,.doc .body ol{padding-left:22px;margin:0 0 12px}

/* 教程卡片 */
.tuts{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:12px}
.tut{
  background:#12121c;border:1px solid rgba(255,255,255,.07);border-radius:12px;
  padding:14px;cursor:pointer;transition:border-color .18s,transform .18s;
}
.tut:hover{border-color:rgba(124,92,255,.45);transform:translateY(-2px)}
.tut .t{font-weight:600;margin-bottom:6px}
.tut .c{font-size:12px;color:#6b6b85}

/* 全屏阅读 */
#reader{position:fixed;inset:0;background:#0d0d14;z-index:300;overflow:auto;padding:24px 16px}
#reader .bar{
  position:sticky;top:-24px;background:#0d0d14;padding:12px 0;margin:-24px 0 16px;
  display:flex;align-items:center;gap:10px;border-bottom:1px solid rgba(255,255,255,.07);
}