/* site.css — BandName AI 全套样式 */
:root{
  --bg:#0b0b10;
  --bg2:#14141d;
  --card:#1b1b27;
  --line:#2a2a3a;
  --txt:#e8e6f0;
  --mut:#9a97ad;
  --acc:#ff3d7f;   /* neon pink */
  --acc2:#7c3aed;  /* purple */
  --acc3:#22d3ee;  /* cyan */
  --good:#34d399;
  --maxw:1080px;
  --r:14px;
}
*{box-sizing:border-box}
body{
  margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  background:linear-gradient(180deg,#0b0b10 0%,#0e0e16 60%,#120f1a 100%);
  background-attachment:fixed;color:var(--txt);line-height:1.6;
}
a{color:var(--acc2);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}

/* Header */
header.site{
  border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50;
  background:rgba(11,11,16,.82);backdrop-filter:blur(8px);
}
header.site .wrap{display:flex;align-items:center;gap:20px;height:62px}
.logo{font-weight:800;font-size:19px;letter-spacing:.3px;color:var(--txt)}
.logo b{color:var(--acc)}
.logo span{font-size:11px;color:var(--mut);display:block;margin-top:-2px;font-weight:600}
nav.pills{display:flex;gap:6px;flex-wrap:wrap;margin-left:auto}
nav.pills a{font-size:13px;color:var(--mut);padding:5px 10px;border-radius:30px;border:1px solid transparent}
nav.pills a:hover{color:var(--txt);border-color:var(--line);text-decoration:none}
nav.pills a.active{color:#fff;background:linear-gradient(90deg,var(--acc),var(--acc2));border:0}

/* Hero */
.hero{padding:56px 0 26px;text-align:center}
.hero h1{font-size:clamp(1.8rem,4.5vw,3rem);margin:0 0 10px;font-weight:900;letter-spacing:-.5px}
.hero h1 em{font-style:normal;background:linear-gradient(90deg,var(--acc),var(--acc2),var(--acc3));
  -webkit-background-clip:text;background-clip:text;color:transparent}
.hero p.sub{color:var(--mut);max-width:640px;margin:0 auto 8px;font-size:1.05rem}
.meta{color:var(--mut);font-size:.86rem}

/* Tool card */
.tool{background:var(--bg2);border:1px solid var(--line);border-radius:var(--r);padding:26px;margin:22px 0}
.field{margin-bottom:18px}
.field>label{display:block;font-size:.86rem;font-weight:700;color:var(--mut);margin-bottom:8px;letter-spacing:.4px;text-transform:uppercase}
.chips{display:flex;flex-wrap:wrap;gap:8px}
.chip{padding:8px 14px;border-radius:30px;border:1px solid var(--line);background:var(--card);color:var(--txt);cursor:pointer;
  font-size:.88rem;user-select:none;transition:all .15s}
.chip:hover{border-color:var(--acc2)}
.chip.on{background:linear-gradient(90deg,var(--acc),var(--acc2));border:0;color:#fff;font-weight:600}
.seg{display:flex;flex-wrap:wrap;gap:8px}
.seg .opt{padding:7px 12px;border-radius:8px;border:1px solid var(--line);background:var(--card);cursor:pointer;font-size:.86rem}
.seg .opt.on{background:var(--acc2);border-color:var(--acc2);color:#fff}

.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;cursor:pointer;border:0;border-radius:40px;
  padding:13px 26px;font-size:1rem;font-weight:700;color:#fff;
  background:linear-gradient(90deg,var(--acc),var(--acc2));box-shadow:0 6px 22px rgba(255,61,127,.35);transition:transform .1s}
.btn:hover{transform:translateY(-1px)}
.btn.ghost{background:var(--card);box-shadow:none;border:1px solid var(--line)}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}

/* Results */
.results{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:12px;margin-top:6px;min-height:60px}
.card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:14px 16px;position:relative;display:flex;
  flex-direction:column;gap:8px;transition:transform .12s, border-color .12s}
.card:hover{border-color:var(--acc2);transform:translateY(-2px)}
.card .nm{font-size:1.02rem;font-weight:700;word-break:break-word}
.card .tagrow{display:flex;gap:6px;align-items:center}
.tag{font-size:.66rem;font-weight:700;padding:2px 8px;border-radius:20px;background:rgba(124,58,237,.18);color:var(--acc2);border:1px solid rgba(124,58,237,.3)}
.tag.ai{background:rgba(34,211,238,.12);color:var(--acc3);border-color:rgba(34,211,238,.3)}
.card .acts{display:flex;gap:6px;margin-top:auto}
.card .acts button{flex:1;background:var(--bg2);border:1px solid var(--line);color:var(--txt);border-radius:8px;padding:6px 0;font-size:.78rem;cursor:pointer}
.card .acts button:hover{border-color:var(--acc2)}
.empty{color:var(--mut);text-align:center;padding:24px 0;grid-column:1/-1}

/* Sections */
.section{margin:34px 0}
.section h2{font-size:1.5rem;font-weight:800}
.grid-genres{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:12px}
.genre-link{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px;display:block;transition:all .15s}
.genre-link:hover{border-color:var(--acc2);transform:translateY(-2px);text-decoration:none}
.genre-link .glabel{font-weight:800;font-size:1.02rem}
.genre-link .gap{font-size:.8rem;color:var(--mut)}
.grid3{display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:16px}
.info{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:18px}
.info h4{margin:0 0 6px;color:var(--acc3)}

/* Article content */
.article{background:var(--bg2);border:1px solid var(--line);border-radius:12px;padding:26px;line-height:1.75}
.article h2,.article h3{color:#fff}
.article ul{padding-left:22px}
.article .example{display:inline-block;background:var(--card);border:1px solid var(--line);border-radius:8px;padding:2px 10px;margin:3px 4px 3px 0}

/* FAQ */
.faq details{background:var(--card);border:1px solid var(--line);border-radius:10px;padding:14px 16px;margin-bottom:8px}
.faq summary{font-weight:700;cursor:pointer}
.faq p{margin:8px 0 0;color:var(--mut)}

/* Footer */
footer.site{border-top:1px solid var(--line);margin-top:50px;padding:28px 0;color:var(--mut);font-size:.86rem}
footer.site .wrap{display:flex;flex-wrap:wrap;gap:16px;justify-content:space-between}
footer.site a{color:var(--mut);margin-right:14px}
.badge{display:inline-block;font-size:.72rem;color:var(--acc3);border:1px solid rgba(34,211,238,.35);border-radius:20px;padding:2px 10px;margin-left:6px;vertical-align:middle}

.genselect{max-width:340px;width:100%}
select,input[type=text]{width:100%;padding:11px 12px;border-radius:8px;border:1px solid var(--line);background:var(--card);color:var(--txt);font-size:.92rem}
input[type=text]:focus{outline:none;border-color:var(--acc2)}
.row{display:flex;gap:10px;flex-wrap:wrap}
.row>*{flex:1;min-width:150px}

.fade-in{animation:fade .3s ease}
@keyframes fade{from{opacity:0;transform:translateY(4px)}to{opacity:1;transform:none}}

@media(max-width:640px){
  header.site .wrap{flex-wrap:wrap;height:auto;padding:10px 0}
  nav.pills{margin-left:0;width:100%}
  .tool{padding:18px}
}