@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

:root {
  --bg-0: #0B1120;
  --primary: #22D3EE;
  --primary-2: #3B82F6;
  --primary-3: #0EA5E9;
  --text: #E5E7EB;
  --text-dim: #9CA3AF;
  --ok: #22C55E;
  --err: #EF4444;
  --glass: rgba(255,255,255,0.06);
  --glass-border: rgba(34,211,238,0.18);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
  font-family: "PingFang SC","Microsoft YaHei",sans-serif;
  background: radial-gradient(circle at 20% 0%, #16243b 0%, var(--bg-0) 55%);
  color: var(--text); min-height: 100vh; overflow-x: hidden;
}
.aurora {
  position: fixed; inset: 0; z-index: 0;
  background:
    radial-gradient(600px 400px at 80% 10%, rgba(59,130,246,0.18), transparent),
    radial-gradient(500px 400px at 10% 80%, rgba(34,211,238,0.14), transparent);
  pointer-events: none;
}
.topbar {
  position: relative; z-index: 1; display: flex; align-items: center; justify-content: space-between;
  padding: 20px 32px; border-bottom: 1px solid var(--glass-border); backdrop-filter: blur(10px);
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo { font-size: 28px; color: var(--primary); text-shadow: 0 0 12px rgba(34,211,238,0.6); }
.topbar h1 { font-size: 22px; font-weight: 600; }
.sub { color: var(--text-dim); font-size: 13px; }
.back-btn { color: var(--primary); text-decoration: none; font-size: 14px; padding: 8px 16px; border: 1px solid var(--glass-border); border-radius: 10px; transition: all .2s; }
.back-btn:hover { background: var(--glass); box-shadow: 0 0 16px rgba(34,211,238,0.3); }

.stepper {
  position: relative; z-index: 1; display: flex; justify-content: center; gap: 8px;
  margin: 24px auto 0; flex-wrap: wrap;
}
.step {
  display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-dim);
  padding: 8px 16px; border: 1px solid var(--glass-border); border-radius: 30px;
  background: var(--glass); transition: all .25s;
}
.step span {
  width: 22px; height: 22px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,0.1); font-size: 12px;
}
.step.active { color: #fff; border-color: var(--primary); box-shadow: 0 0 16px rgba(34,211,238,0.25); }
.step.active span { background: linear-gradient(135deg,var(--primary-3),var(--primary-2)); color: #fff; }

.container { position: relative; z-index: 1; max-width: 900px; margin: 24px auto 40px; padding: 0 20px; display: flex; flex-direction: column; gap: 22px; }
.glass { background: var(--glass); border: 1px solid var(--glass-border); border-radius: 18px; backdrop-filter: blur(14px); box-shadow: 0 8px 40px rgba(0,0,0,0.35); padding: 24px; }
.card-title { font-size: 18px; font-weight: 500; margin-bottom: 16px; color: #fff; }

.scene-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 16px; }
.scene-opt {
  text-align: center; padding: 24px 12px; border: 1px solid var(--glass-border); border-radius: 14px;
  cursor: pointer; transition: all .25s; background: rgba(0,0,0,0.2);
}
.scene-opt:hover { transform: translateY(-3px); border-color: var(--primary); box-shadow: 0 0 22px rgba(34,211,238,0.25); }
.scene-opt.selected { border-color: var(--primary); background: rgba(34,211,238,0.12); }
.scene-ico { font-size: 38px; color: var(--primary); margin-bottom: 8px; }
.scene-opt h3 { font-size: 16px; font-weight: 500; }
.scene-opt p { font-size: 12px; color: var(--text-dim); margin-top: 4px; }

.prod-grid { display: grid; grid-template-columns: repeat(2,1fr); gap: 14px; }
.prod-card {
  padding: 16px; border: 1px solid var(--glass-border); border-radius: 12px; cursor: pointer;
  background: rgba(0,0,0,0.2); transition: all .2s; display: flex; flex-direction: column; gap: 6px;
}
.prod-card:hover { border-color: var(--primary); transform: translateY(-2px); }
.prod-card.selected { border-color: var(--primary); background: rgba(34,211,238,0.12); }
.prod-card h4 { font-size: 15px; }
.prod-card .meta { font-size: 12px; color: var(--text-dim); }
.tag { display: inline-block; padding: 2px 10px; border-radius: 20px; font-size: 11px; }
.tag.arc { background: rgba(59,130,246,0.2); color: #93c5fd; }
.tag.corner { background: rgba(245,158,11,0.2); color: #fcd34d; }
.tag.normal { background: rgba(34,197,94,0.2); color: #86efac; }

.form-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 14px; margin-bottom: 16px; }
label { display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-dim); }
input, select { background: rgba(0,0,0,0.3); border: 1px solid var(--glass-border); color: var(--text); padding: 10px 12px; border-radius: 10px; font-size: 14px; outline: none; transition: border .2s; }
input:focus, select:focus { border-color: var(--primary); box-shadow: 0 0 10px rgba(34,211,238,0.25); }
#sceneForm .sub-form { margin-bottom: 16px; padding: 14px; border: 1px dashed var(--glass-border); border-radius: 12px; }
#sceneForm .sub-form h4 { font-size: 14px; color: var(--primary); margin-bottom: 10px; }
.width-row { display: flex; gap: 10px; align-items: center; margin-bottom: 8px; }
.width-row input { flex: 1; }
.width-row .lbl { width: 70px; font-size: 12px; color: var(--text-dim); }

.btn { border: none; border-radius: 10px; padding: 11px 22px; font-size: 14px; cursor: pointer; font-weight: 500; transition: all .2s; color: #fff; text-decoration: none; display: inline-flex; align-items: center; gap: 6px; }
.btn.primary { background: linear-gradient(135deg,var(--primary-3),var(--primary-2)); }
.btn.primary:hover { box-shadow: 0 0 20px rgba(59,130,246,0.5); transform: translateY(-1px); }
.btn.success { background: linear-gradient(135deg,#16a34a,var(--ok)); }
.btn.success:hover { box-shadow: 0 0 20px rgba(34,197,94,0.5); }
.btn:not(.primary):not(.success) { background: var(--glass); border: 1px solid var(--glass-border); }
.btn:not(.primary):not(.success):hover { border-color: var(--primary); }
.status { margin-top: 14px; font-size: 13px; min-height: 18px; }
.status.ok { color: var(--ok); }
.status.err { color: var(--err); }

/* ---------- 上传箱体外形图 ---------- */
.upload-zone {
  border: 2px dashed var(--glass-border); border-radius: 14px;
  padding: 34px; text-align: center; cursor: pointer; transition: all .25s;
  background: rgba(34,211,238,0.03);
}
.upload-zone:hover, .upload-zone.drag { border-color: var(--primary); background: rgba(34,211,238,0.1); }
.upload-icon { font-size: 34px; color: var(--primary); }
.upload-inner p { margin: 8px 0 4px; }
.hint { color: var(--text-dim); font-size: 12px; }
.form-row { display: flex; gap: 16px; margin: 18px 0; flex-wrap: wrap; }
.form-row label { flex: 1; display: flex; flex-direction: column; gap: 6px; font-size: 13px; color: var(--text-dim); }
.btn:disabled { opacity: .4; cursor: not-allowed; }
.upload-preview { margin-top: 18px; border-top: 1px dashed var(--glass-border); padding-top: 16px; }
.card-sub { font-size: 15px; color: var(--text); margin: 4px 0 14px; }
.preview-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.pv-item {
  background: rgba(0,0,0,0.35); border: 1px solid var(--glass-border);
  border-radius: 12px; padding: 14px;
}
.pv-tag { color: var(--primary); font-size: 13px; margin-bottom: 8px; font-weight: 500; }
.pv-block, .pv-size { font-size: 12px; color: var(--text-dim); line-height: 1.6; }
.upload-preview .btn.success { margin-top: 16px; }

/* 产品节点：上传区 + 选择现有产品 合并 */
.node-block { padding: 4px 0; }
.node-divider { margin-top: 22px; padding-top: 22px; border-top: 1px dashed var(--glass-border); }
.prod-select-row { display: flex; gap: 12px; align-items: center; flex-wrap: wrap; }
.prod-select-row select { min-width: 320px; flex: 1; }

/* 外弧/内弧切换 */
.arc-mode-row {
  display: flex; align-items: center; flex-wrap: wrap; gap: 12px 20px;
  margin: 16px 0 4px; padding: 12px 14px;
  background: rgba(34,211,238,0.05); border: 1px solid var(--glass-border); border-radius: 12px;
}
.arc-mode-label { font-size: 13px; color: var(--text-dim); }
.arc-mode-opt { display: inline-flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text); cursor: pointer; }
.arc-mode-opt input { accent-color: var(--primary); }

.result-actions { display: flex; gap: 12px; margin-bottom: 16px; }
.preview-box { background: rgba(0,0,0,0.4); border: 1px solid var(--glass-border); border-radius: 12px; padding: 12px; text-align: center; }
.preview-box img { max-width: 100%; border-radius: 8px; }

/* ---------- 弧度信息统计柱状图 ---------- */
.stats-block { margin-top: 24px; border-top: 1px dashed var(--glass-border); padding-top: 18px; }
.bar-chart {
  display: flex; align-items: flex-end; gap: 8px; height: 180px;
  padding: 8px 4px 0; border-bottom: 1px solid var(--glass-border);
  overflow-x: auto;
}
.bar-col { display: flex; flex-direction: column; align-items: center; justify-content: flex-end; min-width: 44px; height: 100%; flex-shrink: 0; }
.bar-val { font-size: 11px; color: var(--text); margin-bottom: 4px; }
.bar {
  width: 28px; border-radius: 6px 6px 0 0;
  background: linear-gradient(180deg, var(--primary-2), var(--primary-3));
  box-shadow: 0 0 12px rgba(59,130,246,0.4);
  min-height: 3px; transition: height .4s ease;
}
.bar-col:hover .bar { filter: brightness(1.3); }
.bar-lbl { font-size: 10px; color: var(--text-dim); margin-top: 6px; white-space: nowrap; }
.stats-legend { display: flex; flex-wrap: wrap; gap: 6px 16px; margin-top: 14px; font-size: 12px; color: var(--text-dim); }
.stats-legend .item { display: inline-flex; align-items: center; gap: 6px; }
.stats-legend .dot { width: 10px; height: 10px; border-radius: 3px; background: var(--primary-3); }

/* ================= AI 图纸助手 ================= */
.ai-fab {
  position: fixed; right: 26px; bottom: 26px; z-index: 900;
  padding: 13px 22px; border: 1px solid var(--glass-border);
  background: linear-gradient(135deg, rgba(59,130,246,0.9), rgba(14,165,233,0.85));
  color: #fff; font-size: 15px; font-weight: 600; border-radius: 999px;
  cursor: pointer; box-shadow: 0 8px 24px rgba(59,130,246,0.35);
  transition: transform .2s ease, box-shadow .2s ease;
}
.ai-fab:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(59,130,246,0.5); }

.ai-panel {
  position: fixed; right: 20px; bottom: 20px; z-index: 901;
  width: 430px; max-width: calc(100vw - 40px); height: 620px; max-height: calc(100vh - 40px);
  display: flex; flex-direction: column;
  background: rgba(13, 20, 36, 0.97); border: 1px solid var(--glass-border);
  border-radius: 16px; box-shadow: 0 20px 50px rgba(0,0,0,0.5);
  overflow: hidden; backdrop-filter: blur(14px);
}
.ai-panel.hidden { display: none; }

.ai-head {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 16px; background: rgba(34,211,238,0.08);
  border-bottom: 1px solid var(--glass-border);
}
.ai-title { font-size: 15px; font-weight: 600; color: var(--primary); }
.ai-head-actions { display: flex; gap: 8px; }
.ai-mini {
  background: rgba(255,255,255,0.08); border: 1px solid var(--glass-border);
  color: var(--text-dim); font-size: 12px; padding: 4px 10px; border-radius: 8px; cursor: pointer;
}
.ai-mini:hover { color: var(--text); background: rgba(255,255,255,0.14); }

.ai-body { flex: 1; overflow-y: auto; padding: 14px 14px 6px; display: flex; flex-direction: column; gap: 10px; }
.ai-msg {
  max-width: 92%; padding: 10px 13px; border-radius: 12px;
  font-size: 13.5px; line-height: 1.6; word-break: break-word; white-space: pre-wrap;
}
.ai-msg.user { align-self: flex-end; background: linear-gradient(135deg, rgba(59,130,246,0.85), rgba(14,165,233,0.8)); color: #fff; }
.ai-msg.assistant { align-self: flex-start; background: rgba(255,255,255,0.08); color: var(--text); }
.ai-msg.system { align-self: center; background: rgba(34,211,238,0.06); color: var(--text-dim); font-size: 12.5px; }

.ai-preview { padding: 10px 14px; border-top: 1px dashed var(--glass-border); }
.ai-preview.hidden { display: none; }
.ai-preview-title { font-size: 12px; color: var(--text-dim); margin-bottom: 8px; }
.ai-preview img { max-width: 100%; max-height: 220px; border-radius: 10px; border: 1px solid var(--glass-border); background: rgba(0,0,0,0.4); }
.ai-preview-actions { margin-top: 8px; }
.ai-dl { display: inline-block; font-size: 12.5px; padding: 6px 12px; }

.ai-foot { display: flex; gap: 10px; padding: 12px 14px; border-top: 1px solid var(--glass-border); }
.ai-foot input {
  flex: 1; padding: 10px 14px; border-radius: 10px; font-size: 14px;
  background: rgba(255,255,255,0.07); border: 1px solid var(--glass-border); color: var(--text);
  outline: none;
}
.ai-foot input:focus { border-color: var(--primary); }
.ai-foot button {
  padding: 10px 18px; border-radius: 10px; font-size: 14px; font-weight: 600;
  background: linear-gradient(135deg, var(--primary-2), var(--primary-3)); color: #fff;
  border: none; cursor: pointer;
}
.ai-foot button:disabled { opacity: 0.5; cursor: not-allowed; }