/* 图片识别说明工具 · 页面样式（浅色主题，金边呼应统一顶栏） */
:root{
  --gold:#c9a227;
  --gold-soft:rgba(201,162,39,.12);
  --gold-line:rgba(201,162,39,.35);
  --ink:#222;
  --muted:#7a7a7a;
  --bg:#f6f4ee;
  --card:#fff;
  --border:#e6e1d6;
  --ok:#2e9e5b;
  --err:#d9534f;
  --busy:#d98a1f;
}
*{ box-sizing:border-box; }
body{
  margin:0;
  background:linear-gradient(180deg,#faf8f2 0%,var(--bg) 100%);
  color:var(--ink);
  font-family:system-ui,-apple-system,"PingFang SC","Microsoft YaHei",sans-serif;
}
.wrap{ max-width:1040px; margin:0 auto; padding:22px 18px 40px; }
.subtitle{ color:var(--muted); margin:6px 0 18px; font-size:14px; }
.grid{ display:grid; grid-template-columns:1fr 1fr; gap:18px; }
@media (max-width:780px){ .grid{ grid-template-columns:1fr; } }

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:14px;
  padding:18px;
  box-shadow:0 4px 18px rgba(0,0,0,.04);
}
.card-title{
  margin:0 0 14px;
  font-size:16px;
  font-weight:700;
  color:#3a3320;
  border-left:4px solid var(--gold);
  padding-left:10px;
}

/* 上传区 */
.drop-zone{
  border:2px dashed var(--gold-line);
  border-radius:12px;
  background:var(--gold-soft);
  min-height:200px;
  display:flex; align-items:center; justify-content:center;
  cursor:pointer; transition:.18s; outline:none;
}
.drop-zone:hover,.drop-zone:focus{ background:rgba(201,162,39,.18); border-color:var(--gold); }
.drop-zone.drag{ background:rgba(201,162,39,.26); border-color:var(--gold); transform:scale(1.01); }
.dz-inner{ text-align:center; padding:18px; }
.dz-icon{ font-size:42px; }
.dz-text{ margin-top:8px; font-size:15px; font-weight:600; color:#4a4128; }
.dz-hint{ margin-top:6px; font-size:12px; color:var(--muted); }

/* 预览 */
.preview-box{ text-align:center; }
.preview-box img{
  max-width:100%; max-height:320px; border-radius:10px;
  border:1px solid var(--border); background:#fff;
}
.preview-meta{ margin:10px 0 6px; font-size:12px; color:var(--muted); }
.preview-meta b{ color:#4a4128; }

/* 状态条 */
.status-bar{ display:flex; align-items:center; gap:8px; font-size:13px; color:var(--muted); margin-bottom:10px; }
.dot{ width:9px; height:9px; border-radius:50%; background:#bbb; flex:none; }
.dot.idle{ background:#bbb; }
.dot.busy{ background:var(--busy); animation:pulse 1s infinite; }
.dot.ok{ background:var(--ok); }
.dot.err{ background:var(--err); }
@keyframes pulse{ 0%,100%{opacity:1;} 50%{opacity:.35;} }

/* 说明框 */
.desc-box{
  width:100%; min-height:230px; resize:vertical;
  border:1px solid var(--border); border-radius:10px;
  padding:12px 14px; font-size:14px; line-height:1.7; color:var(--ink);
  background:#fcfbf7; font-family:inherit;
}
.desc-box:focus{ outline:none; border-color:var(--gold); box-shadow:0 0 0 3px var(--gold-soft); }
.desc-box[readonly]{ background:#f3f1ea; color:#555; }

.bar-row{ display:flex; align-items:center; justify-content:space-between; margin-top:12px; gap:10px; flex-wrap:wrap; }
.char-count{ font-size:12px; color:var(--muted); }
.btn-group{ display:flex; gap:8px; flex-wrap:wrap; }

/* 按钮 */
.btn{
  border:1px solid transparent; border-radius:9px; padding:9px 16px;
  font-size:14px; cursor:pointer; font-family:inherit; transition:.15s; font-weight:600;
}
.btn:disabled{ opacity:.45; cursor:not-allowed; }
.btn-primary{ background:var(--gold); color:#2a230d; }
.btn-primary:not(:disabled):hover{ background:#b8911f; }
.btn-secondary{ background:#fff; color:#4a4128; border-color:var(--gold-line); }
.btn-secondary:not(:disabled):hover{ background:var(--gold-soft); }
.btn-ghost{ background:transparent; color:#6a6150; border-color:var(--border); }
.btn-ghost:not(:disabled):hover{ background:#f0ede4; }
.btn-sm{ padding:6px 12px; font-size:13px; }

.hidden{ display:none !important; }
.foot-note{ margin-top:18px; font-size:12px; color:var(--muted); text-align:center; }

/* ===== 固定导航栏（滚动/切换时始终可见） ===== */
/* 共享顶栏固定置顶（仅本页生效，不污染其它工具） */
.tool-header-bar{ position:fixed; top:0; left:0; right:0; z-index:1001; }
/* 工具内导航固定，贴在共享顶栏下方 */
.tool-nav{
  position:fixed; top:54px; left:0; right:0; z-index:1000;
  height:52px; display:flex; align-items:center;
  background:linear-gradient(180deg,#fffdf7 0%,#f7f3e9 100%);
  border-bottom:1px solid var(--gold-line);
  box-shadow:0 3px 12px rgba(0,0,0,.05);
  font-family:inherit;
}
/* 内容上移，避免被两层固定栏遮住 */
body{ padding-top:106px; }
.tn-inner{
  width:100%; max-width:1040px; margin:0 auto; padding:0 18px;
  display:flex; align-items:center; gap:12px;
}
.tn-brand{ font-size:15px; font-weight:700; color:#3a3320; white-space:nowrap; }
.tn-actions{ display:flex; gap:8px; flex:1; flex-wrap:wrap; }
.tn-btn{
  border:1px solid var(--gold-line); background:#fff; color:#4a4128;
  border-radius:9px; padding:7px 12px; font-size:13px; font-weight:600;
  cursor:pointer; font-family:inherit; transition:.15s;
}
.tn-btn:hover:not(:disabled){ background:var(--gold-soft); }
.tn-btn:disabled{ opacity:.45; cursor:not-allowed; }
.tn-btn-primary{ background:var(--gold); color:#2a230d; border-color:var(--gold); }
.tn-btn-primary:hover:not(:disabled){ background:#b8911f; }
.tn-status{ font-size:12px; color:var(--muted); white-space:nowrap; }
@media (max-width:640px){
  .tn-brand{ display:none; }
  .tn-status{ display:none; }
  .tn-inner{ gap:8px; }
}