/* ===== 404 页面 nf404 ===== */
.nf{position:relative;overflow:hidden;padding:26px 0 10px}
.nf .blobs{position:absolute;inset:0;pointer-events:none;z-index:0}
.nf .blob{position:absolute;border-radius:50%;filter:blur(70px);opacity:.32}
.nf .blob-1{width:420px;height:420px;left:-120px;top:-100px;background:radial-gradient(circle,#a5b4fc,transparent 68%)}
.nf .blob-2{width:380px;height:380px;right:-90px;top:40px;background:radial-gradient(circle,#67e8f9,transparent 68%)}
.nf-in{position:relative;z-index:1;display:grid;grid-template-columns:1.06fr .94fr;gap:36px;align-items:center;padding-top:14px}

.nf-code{font-size:132px;line-height:.92;font-weight:900;letter-spacing:-6px;
  background:linear-gradient(115deg,#1668c2,#4f46e5 42%,#06b6d4);
  -webkit-background-clip:text;background-clip:text;color:transparent;
  filter:drop-shadow(0 12px 26px rgba(79,70,229,.18))}
.nf-txt h1{margin-top:6px;font-size:31px;font-weight:800;letter-spacing:.5px;color:var(--ink)}
.nf-txt .desc{margin-top:12px;font-size:14px;line-height:2;color:var(--ink2)}
.nf-txt .desc b{color:var(--ink);font-weight:600}

.nf-search{margin-top:22px;display:flex;align-items:center;gap:8px;background:#fff;border:1.5px solid var(--line);
  border-radius:14px;padding:6px 6px 6px 14px;max-width:520px;box-shadow:0 10px 26px -18px rgba(16,24,40,.35);transition:.2s}
.nf-search:focus-within{border-color:#c7d2fe;box-shadow:0 0 0 4px rgba(79,70,229,.08)}
.nf-search>svg{width:18px;height:18px;flex:none;color:var(--ink3)}
.nf-search input{flex:1;min-width:0;height:38px;border:0;outline:0;background:transparent;
  font-size:14px;color:var(--ink);font-family:inherit}
.nf-search button{flex:none;height:38px;padding:0 22px;border:0;border-radius:10px;cursor:pointer;
  background:var(--grad);color:#fff;font-size:14px;font-weight:700;letter-spacing:1px;font-family:inherit}
.nf-search button:hover{filter:brightness(1.07)}

.nf-hot{margin-top:12px;display:flex;flex-wrap:wrap;align-items:center;gap:7px;font-size:12.5px;color:var(--ink3)}
.nf-hot a{padding:3px 10px;border-radius:99px;background:#fff;border:1px solid var(--line);color:var(--ink2);font-size:12.5px}
.nf-hot a:hover{border-color:#c7d2fe;color:var(--brand);background:#f8f8ff}

.nf-actions{margin-top:22px;display:flex;flex-wrap:wrap;gap:10px}
.nf-btn{display:inline-flex;align-items:center;gap:7px;height:42px;padding:0 22px;border-radius:11px;
  font-size:14px;font-weight:700;color:#fff;background:var(--grad);
  box-shadow:0 12px 24px -12px rgba(79,70,229,.7);letter-spacing:.5px}
.nf-btn:hover{transform:translateY(-1px);filter:brightness(1.06)}
.nf-btn svg{width:15px;height:15px}
.nf-btn.ghost{background:#fff;color:var(--ink2);border:1.5px solid var(--line);box-shadow:none;font-weight:600}
.nf-btn.ghost:hover{border-color:#c7d2fe;color:var(--brand);background:#fafaff}

/* 插画 */
.nf-art{position:relative;display:flex;align-items:center;justify-content:center}
.nf-art svg{width:100%;max-width:440px;height:auto;display:block}
.nf-float{animation:nfFloat 6s ease-in-out infinite;transform-origin:center}
@keyframes nfFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-9px)}}
.nf-pulse{animation:nfPulse 3.2s ease-in-out infinite}
@keyframes nfPulse{0%,100%{opacity:.55}50%{opacity:1}}

/* 区块 */
.nf-sec{padding:34px 24px 0}
.nf-h2{display:flex;align-items:center;gap:9px;font-size:18px;font-weight:800;color:var(--ink);letter-spacing:.5px}
.nf-h2::before{content:"";width:4px;height:17px;border-radius:99px;background:var(--grad)}
.nf-h2 em{font-style:normal;font-size:12px;font-weight:500;color:var(--ink3);letter-spacing:0;margin-left:2px}

.nf-channels{margin-top:16px;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:12px}
.nf-ch{display:flex;align-items:center;gap:11px;background:var(--card);border:1px solid var(--line);
  border-radius:14px;padding:13px 14px;min-width:0;transition:.2s}
.nf-ch:hover{border-color:#d6d9ff;box-shadow:0 12px 26px -18px rgba(79,70,229,.5);transform:translateY(-2px)}
.nf-ch .ic{flex:none;width:38px;height:38px;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-size:16px;font-weight:800;color:#fff;letter-spacing:0}
.nf-ch .tx{min-width:0;line-height:1.35}
.nf-ch .tx b{display:block;font-size:13.5px;font-weight:700;color:var(--ink);white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.nf-ch .tx i{font-style:normal;font-size:11.5px;color:var(--ink3)}
.nf-ch:nth-child(5n+1) .ic{background:linear-gradient(135deg,#4f46e5,#7c3aed)}
.nf-ch:nth-child(5n+2) .ic{background:linear-gradient(135deg,#0891b2,#06b6d4)}
.nf-ch:nth-child(5n+3) .ic{background:linear-gradient(135deg,#1668c2,#4f46e5)}
.nf-ch:nth-child(5n+4) .ic{background:linear-gradient(135deg,#7c3aed,#06b6d4)}
.nf-ch:nth-child(5n+5) .ic{background:linear-gradient(135deg,#0e7490,#22d3ee)}

.nf-cols{display:grid;grid-template-columns:1fr 1fr;gap:18px;align-items:start;padding-bottom:44px}
.nf-card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:18px 20px 12px;box-shadow:var(--shadow)}
.nf-list{list-style:none;margin-top:10px}
.nf-list li{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line);min-width:0}
.nf-list li:last-child{border-bottom:none}
.nf-list .rk{flex:none;width:20px;height:20px;border-radius:6px;display:flex;align-items:center;justify-content:center;
  font-size:11.5px;font-weight:800;color:#fff;background:#c7ccdd}
.nf-list li:nth-child(1) .rk{background:linear-gradient(135deg,#f43f5e,#fb7185)}
.nf-list li:nth-child(2) .rk{background:linear-gradient(135deg,#f59e0b,#fbbf24)}
.nf-list li:nth-child(3) .rk{background:linear-gradient(135deg,#0ea5e9,#22d3ee)}
.nf-list a{flex:1;min-width:0;font-size:13.5px;color:var(--ink2);line-height:1.6;
  display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.nf-list a:hover{color:var(--brand)}
.nf-list .mt{flex:none;font-size:11.5px;color:var(--ink3);white-space:nowrap}
.nf-list .mt.sz{color:#0e7490;font-weight:600}
.nf-card .more{display:flex;align-items:center;justify-content:center;gap:4px;height:38px;margin-top:4px;
  border-top:1px dashed var(--line);font-size:12.5px;color:var(--ink3)}
.nf-card .more:hover{color:var(--brand)}

@media(max-width:980px){
  .nf-channels{grid-template-columns:repeat(3,minmax(0,1fr))}
  .nf-in{gap:18px}
  .nf-code{font-size:112px}
}
@media(max-width:760px){
  .nf-in{grid-template-columns:1fr;gap:6px}
  .nf-art{order:-1;max-width:320px;margin:0 auto}
  .nf-code{font-size:92px;letter-spacing:-4px}
  .nf-txt h1{font-size:24px}
  .nf-txt .desc{font-size:13px}
  .nf-cols{grid-template-columns:1fr}
  .nf-channels{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .nf-sec{padding:26px 16px 0}
  .nf-search button{padding:0 16px}
}
@media(max-width:400px){
  .nf-channels{grid-template-columns:1fr}
}