/* 知库 · 程序合集（独立页） */
:root{
  --ink:#1f2329;
  --ink-2:#373c43;
  --sub:#646a73;
  --muted:#8f959e;
  --line:#e5e6eb;
  --line-2:#eff0f1;
  --bg:#fff;
  --bg-2:#f7f8fa;
  --brand:#3370ff;
  --brand-bg:#e8efff;
  --danger:#d83931;
  --sans:"PingFang SC","HarmonyOS Sans SC","MiSans","Microsoft YaHei UI","Microsoft YaHei",-apple-system,BlinkMacSystemFont,system-ui,sans-serif;
  --mono:"SFMono-Regular",Consolas,Menlo,monospace;
  --pad:clamp(16px,4vw,32px);
  --max:1180px;
}
*{box-sizing:border-box}
html,body{height:100%}
body{
  margin:0;background:var(--bg);color:var(--ink);
  font-family:var(--sans);-webkit-font-smoothing:antialiased;
  font-size:14px;line-height:1.7;
}
a{color:inherit;text-decoration:none}
button{font-family:inherit}

/* ---------- 顶栏 ---------- */
.top{
  position:sticky;top:0;z-index:20;height:56px;
  display:flex;align-items:center;gap:26px;
  padding:0 var(--pad);
  background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(12px);
  border-bottom:1px solid var(--line-2);
}
.brand{display:flex;align-items:center;gap:8px;font-weight:600;font-size:15px}
.brand .mark{
  width:24px;height:24px;border-radius:7px;display:grid;place-items:center;
  background:var(--brand);color:#fff;font-size:13px;font-weight:600;
}
.top-nav{display:flex;gap:4px;margin-left:6px}
.top-nav a{
  padding:6px 12px;border-radius:7px;font-size:13.5px;color:var(--sub);
  transition:background .18s,color .18s;
}
.top-nav a:hover{background:var(--bg-2);color:var(--ink)}
.top-nav a.on{background:var(--brand-bg);color:var(--brand);font-weight:500}
.top-right{margin-left:auto;display:flex;align-items:center;gap:10px}
.avatar{
  width:26px;height:26px;border-radius:50%;display:grid;place-items:center;
  background:var(--brand-bg);color:var(--brand);font-size:12px;font-weight:600;
}
.who{font-size:13px;color:var(--sub)}
.link{border:0;background:none;color:var(--muted);font-size:13px;cursor:pointer;padding:4px 6px;border-radius:6px}
.link:hover{background:var(--bg-2);color:var(--ink)}

/* ---------- 页面 ---------- */
.wrap{max-width:var(--max);margin:0 auto;padding:0 var(--pad) 80px}
.head{
  display:flex;align-items:flex-end;gap:20px;flex-wrap:wrap;
  padding:44px 0 6px;
}
.head-text{flex:1 1 380px;min-width:0}
.head h1{margin:0;font-size:28px;font-weight:600;letter-spacing:-.02em;line-height:1.3}
.head p{margin:8px 0 0;font-size:14px;color:var(--sub);max-width:560px}

.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  height:36px;padding:0 16px;border-radius:8px;border:1px solid var(--line);
  background:#fff;color:var(--ink);font-size:13.5px;cursor:pointer;
  transition:all .18s ease;
}
.btn:hover{background:var(--bg-2)}
.btn.primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn.primary:hover{background:#2b62e0;border-color:#2b62e0}
.btn .plus{font-size:16px;line-height:1;margin-top:-1px}

.meta{padding:18px 0 14px;font-size:13px;color:var(--muted)}
.meta b{color:var(--ink-2);font-variant-numeric:tabular-nums}

/* ---------- 卡片网格 ---------- */
.grid{
  display:grid;gap:18px;
  grid-template-columns:repeat(auto-fill,minmax(248px,1fr));
}
.card{
  position:relative;display:flex;flex-direction:column;
  border:1px solid var(--line);border-radius:12px;overflow:hidden;
  background:#fff;
  transition:transform .22s cubic-bezier(.2,.7,.2,1),box-shadow .22s,border-color .22s;
}
.card:hover{transform:translateY(-3px);border-color:#c9d4ea;box-shadow:0 12px 26px -16px rgba(31,35,41,.35)}
.preview{
  height:136px;display:grid;place-items:center;
  font-size:38px;line-height:1;
  background:
    radial-gradient(120% 120% at 15% 0%,rgba(51,112,255,.12),transparent 55%),
    radial-gradient(120% 120% at 100% 100%,rgba(255,106,61,.10),transparent 55%),
    var(--bg-2);
  border-bottom:1px solid var(--line-2);
}
.preview span{filter:drop-shadow(0 6px 12px rgba(31,35,41,.14))}
.card-body{padding:14px 16px 15px;display:flex;flex-direction:column;flex:1}
.card-title{
  margin:0;font-size:14.5px;font-weight:600;line-height:1.5;
  overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.card-desc{
  margin:5px 0 0;font-size:12.5px;color:var(--muted);line-height:1.65;
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden;
}
.card-foot{
  margin-top:auto;padding-top:12px;display:flex;align-items:center;justify-content:space-between;
  font-size:12px;color:var(--muted);
}
.tag{
  font-size:11.5px;padding:2px 7px;border-radius:5px;
  background:var(--bg-2);color:var(--sub);
}
.open{color:var(--brand);font-weight:500}
.open:hover{text-decoration:underline}

.acts{
  position:absolute;top:10px;right:10px;display:flex;gap:6px;
  opacity:0;transform:translateY(-4px);transition:opacity .18s,transform .18s;
}
.card:hover .acts{opacity:1;transform:none}
@media (hover:none){.acts{opacity:1;transform:none}}
.acts button{
  width:28px;height:28px;border:1px solid var(--line);border-radius:7px;
  background:rgba(255,255,255,.94);color:var(--sub);cursor:pointer;
  display:grid;place-items:center;font-size:13px;
}
.acts button:hover{color:var(--danger);border-color:#f2c7c4;background:#fdf3f2}

/* ---------- 空状态 ---------- */
.empty{
  grid-column:1/-1;border:1px dashed var(--line);border-radius:14px;
  padding:56px 24px;text-align:center;background:var(--bg-2);
}
.empty .e-ico{
  width:52px;height:52px;margin:0 auto 14px;border-radius:14px;
  display:grid;place-items:center;font-size:22px;color:var(--brand);
  background:var(--brand-bg);
}
.empty h3{margin:0;font-size:15px;font-weight:600}
.empty p{margin:6px 0 18px;font-size:13px;color:var(--muted)}

/* ---------- 弹层 ---------- */
.mask{
  position:fixed;inset:0;background:rgba(15,18,23,.42);z-index:60;
  display:grid;place-items:center;padding:20px;
  animation:fade .16s ease;
}
@keyframes fade{from{opacity:0}to{opacity:1}}
.modal{
  width:min(520px,100%);background:#fff;border-radius:14px;
  box-shadow:0 24px 60px -20px rgba(15,18,23,.4);
  animation:pop .2s cubic-bezier(.2,.7,.2,1);
  max-height:90vh;display:flex;flex-direction:column;
}
@keyframes pop{from{opacity:0;transform:translateY(10px) scale(.98)}to{opacity:1;transform:none}}
.modal-h{padding:18px 22px 0;font-size:16px;font-weight:600}
.modal-b{padding:14px 22px 6px;overflow:auto}
.modal-f{
  padding:14px 22px 18px;display:flex;gap:10px;justify-content:flex-end;
  border-top:1px solid var(--line-2);margin-top:8px;
}
.sub{margin:0 0 14px;font-size:13px;color:var(--muted);line-height:1.7}
.form-row{margin-bottom:13px}
.form-row label{display:block;font-size:12.5px;color:var(--sub);margin-bottom:5px}
.input{
  width:100%;height:36px;padding:0 11px;border:1px solid var(--line);border-radius:8px;
  font-size:13.5px;font-family:inherit;color:var(--ink);background:#fff;
  transition:border-color .16s,box-shadow .16s;
}
.input:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px rgba(51,112,255,.12)}
input[type=file].input{height:auto;padding:8px 10px;font-size:12.5px}
.two{display:grid;grid-template-columns:1fr 1fr;gap:12px}

.toast{
  position:fixed;left:50%;bottom:28px;transform:translateX(-50%) translateY(8px);
  background:#1f2329;color:#fff;font-size:13px;padding:9px 16px;border-radius:9px;
  opacity:0;transition:opacity .2s,transform .2s;z-index:99;pointer-events:none;
}
.toast.on{opacity:1;transform:translateX(-50%)}

@media (max-width:640px){
  .top{gap:12px}
  .bname{display:none}
  .top-nav a{padding:6px 9px;font-size:13px}
  .who{display:none}
  .head{padding-top:28px}
  .head h1{font-size:23px}
  .grid{grid-template-columns:1fr;gap:14px}
  .preview{height:118px}
}