:root {
  --bg: #eef2f7;
  --bg-2: #e3e9f2;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-solid: #ffffff;
  --text: #1c2533;
  --text-soft: #5a6577;
  --border: rgba(20, 40, 80, 0.10);
  --accent: #2f6bff;
  --accent-2: #14c8a8;
  --accent-grad: linear-gradient(135deg, #2f6bff, #14c8a8);
  --danger: #ff4d5e;
  --warn: #ff9f1c;
  --ok: #16c784;
  --shadow: 0 12px 40px rgba(20, 40, 80, 0.10);
  --radius: 18px;
  --radius-sm: 12px;
}

html[data-theme="dark"] {
  --bg: #0b0f17;
  --bg-2: #0e1420;
  --surface: rgba(255, 255, 255, 0.05);
  --surface-solid: #131a26;
  --text: #e8eef7;
  --text-soft: #93a1b8;
  --border: rgba(255, 255, 255, 0.10);
  --accent: #4d86ff;
  --accent-2: #1fe0bd;
  --accent-grad: linear-gradient(135deg, #4d86ff, #1fe0bd);
  --shadow: 0 16px 50px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", system-ui, -apple-system, sans-serif;
  background:
    radial-gradient(1200px 600px at 12% -10%, rgba(47, 107, 255, 0.10), transparent 60%),
    radial-gradient(1000px 500px at 100% 0%, rgba(20, 200, 168, 0.10), transparent 55%),
    var(--bg);
  color: var(--text);
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
}

.app-shell { max-width: 1480px; margin: 0 auto; padding: 18px; }

/* ---------- Topbar ---------- */
.topbar {
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 22px; border-radius: var(--radius); margin-bottom: 16px;
}
.brand { display: flex; align-items: center; gap: 14px; }
.logo {
  width: 46px; height: 46px; border-radius: 13px; display: grid; place-items: center;
  background: var(--accent-grad); color: #fff; font-weight: 800; font-size: 18px;
  box-shadow: 0 8px 22px rgba(47, 107, 255, 0.35);
}
.brand-text h1 { margin: 0; font-size: 20px; letter-spacing: 0.3px; }
.brand-text h1 span { color: var(--accent); font-weight: 700; }
.subtitle { margin: 2px 0 0; font-size: 12.5px; color: var(--text-soft); }
.topbar-actions { display: flex; gap: 10px; align-items: center; }
.theme-toggle {
  display: flex; align-items: center; gap: 7px; cursor: pointer;
  background: var(--surface); border: 1px solid var(--border); color: var(--text);
  padding: 8px 14px; border-radius: 999px; font-size: 13px; transition: 0.2s;
}
.theme-toggle:hover { transform: translateY(-1px); box-shadow: var(--shadow); }

/* ---------- Layout ---------- */
.layout { display: grid; grid-template-columns: 320px 1fr; gap: 16px; align-items: start; }
.sidebar { display: flex; flex-direction: column; gap: 16px; position: sticky; top: 18px; }
.main { display: flex; flex-direction: column; gap: 16px; }

/* ---------- Cards ---------- */
.card { padding: 18px; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); }
.glass { background: var(--surface); backdrop-filter: blur(22px) saturate(160%); -webkit-backdrop-filter: blur(22px) saturate(160%); }
.card-title { margin: 0 0 14px; font-size: 15px; font-weight: 700; display: flex; align-items: center; gap: 8px; }
.card-title::before { content: ""; width: 4px; height: 16px; border-radius: 4px; background: var(--accent-grad); }

/* ---------- Dropzone ---------- */
.dropzone {
  border: 2px dashed var(--border); border-radius: var(--radius-sm);
  padding: 26px 16px; text-align: center; cursor: pointer; transition: 0.25s;
  background: linear-gradient(180deg, rgba(47,107,255,0.04), transparent);
}
.dropzone.drag { border-color: var(--accent); background: rgba(47,107,255,0.10); transform: scale(1.01); }
.dz-ico { font-size: 34px; color: var(--accent); }
.dz-main { margin: 8px 0 2px; font-weight: 600; }
.dz-sub { margin: 0; font-size: 12px; color: var(--text-soft); }
.import-status { margin-top: 12px; display: flex; flex-direction: column; gap: 6px; }
.is-row { display: flex; justify-content: space-between; font-size: 13px; }
.is-row span { color: var(--text-soft); }
.hint { font-size: 11.5px; color: var(--text-soft); margin: 10px 0 0; line-height: 1.5; }

/* ---------- Metrics ---------- */
.metric-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.metric { background: var(--surface-solid); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 10px; text-align: center; }
.metric span { display: block; font-size: 11px; color: var(--text-soft); }
.metric b { font-size: 17px; }
.metric i { font-size: 10px; color: var(--text-soft); font-style: normal; }
.empty-note { font-size: 12px; color: var(--text-soft); text-align: center; margin-top: 10px; }

/* ---------- Viewer ---------- */
.viewer-wrap { position: relative; width: 100%; aspect-ratio: 16 / 11; border-radius: var(--radius-sm); overflow: hidden; background: radial-gradient(circle at 50% 40%, #1b2740, #0a0f1a); border: 1px solid var(--border); }
.viewer-wrap.small { aspect-ratio: 16 / 9; }
.viewer-wrap canvas { width: 100%; height: 100%; display: block; }
/* ---------- 3D 可视化舞台（顶部显眼区） ---------- */
.stage { border: 1px solid rgba(47,107,255,0.28); box-shadow: 0 18px 56px rgba(47,107,255,0.16); }
.stage-badge { font-size: 11px; background: var(--accent-grad); color: #fff; padding: 2px 10px; border-radius: 999px; font-weight: 700; letter-spacing: .5px; }
.stage-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; }
.stage-cell { display: flex; flex-direction: column; gap: 10px; }
.stage-cell-title { font-size: 13px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 8px; }
.stage-cell-title::before { content: ""; width: 4px; height: 15px; border-radius: 4px; background: var(--accent-grad); }
.stage .viewer-wrap { aspect-ratio: 4 / 3; }
.viewer-wrap.mold2d { background: radial-gradient(circle at 50% 45%, #16223c, #090e18); }
#viewerMold2D { width: 100%; height: 100%; display: block; }
@media (max-width: 1180px) { .stage-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 720px)  { .stage-grid { grid-template-columns: 1fr; } }
.viewer-hint { position: absolute; inset: 0; display: grid; place-items: center; color: #9fb0c9; font-size: 13px; pointer-events: none; }
.legend { display: flex; gap: 12px; justify-content: center; margin: 10px 0; font-size: 11.5px; }
.lg { display: inline-flex; align-items: center; gap: 5px; color: var(--text-soft); }
.lg::before { content: ""; width: 11px; height: 11px; border-radius: 3px; }
.lg-ok::before { background: #16c784; }
.lg-low::before { background: #ff9f1c; }
.lg-bad::before { background: #ff4d5e; }
.lg-core::before { background: #5b8def; }
.lg-runner::before { background: #ff9f1c; }
.lg-slider::before { background: #e0563b; }
.lg-cool::before { background: #35a7ff; }
.lg-prod::before { background: #9fb6d6; }
.viewer-ctrls { display: flex; gap: 8px; justify-content: center; }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.form-grid.mini { grid-template-columns: repeat(3, 1fr); margin-top: 12px; }
.sidebar .form-grid.mini { grid-template-columns: repeat(2, 1fr); }
.fld { display: flex; flex-direction: column; gap: 5px; font-size: 12px; color: var(--text-soft); }
.fld input, .fld select {
  background: var(--surface-solid); border: 1px solid var(--border); color: var(--text);
  border-radius: 10px; padding: 9px 11px; font-size: 13.5px; outline: none; transition: 0.2s;
}
.fld input:focus, .fld select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(47,107,255,0.15); }

/* ---------- Buttons ---------- */
.btn { cursor: pointer; border: none; border-radius: 11px; padding: 10px 18px; font-size: 13.5px; font-weight: 600; transition: 0.2s; }
.btn.primary { background: var(--accent-grad); color: #fff; box-shadow: 0 8px 20px rgba(47,107,255,0.30); }
.btn.primary:hover { transform: translateY(-2px); }
.btn.ghost { background: var(--surface-solid); border: 1px solid var(--border); color: var(--text); }
.btn.ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn.small { padding: 6px 12px; font-size: 12px; border-radius: 9px; }

/* ---------- Draft / Layout readout ---------- */
.draft-grid, .layout-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.layout-grid { grid-template-columns: repeat(3, 1fr); }
.draft-item, .layout-item { background: var(--surface-solid); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 11px 12px; }
.draft-item span, .layout-item span { display: block; font-size: 11.5px; color: var(--text-soft); }
.draft-item b, .layout-item b { font-size: 16px; }
.layout-item.hl { background: linear-gradient(135deg, rgba(47,107,255,0.10), rgba(20,200,168,0.10)); border-color: rgba(47,107,255,0.3); }
.auto-badge { font-size: 11px; background: var(--accent-grad); color: #fff; padding: 2px 9px; border-radius: 999px; font-weight: 600; }

/* ---------- Quote ---------- */
.quote-head { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 10px; }
.quote-actions { display: flex; gap: 10px; }
.quote-summary { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin-bottom: 14px; }
.qs { background: linear-gradient(135deg, rgba(47,107,255,0.08), rgba(20,200,168,0.08)); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px; text-align: center; }
.qs span { display: block; font-size: 12px; color: var(--text-soft); }
.qs b { font-size: 20px; background: var(--accent-grad); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.table-wrap { overflow-x: auto; border-radius: var(--radius-sm); border: 1px solid var(--border); }
.quote-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.quote-table th, .quote-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
.quote-table th { background: var(--surface-solid); color: var(--text-soft); font-weight: 600; position: sticky; top: 0; }
.quote-table tbody tr:hover { background: rgba(47,107,255,0.05); }
.quote-table td:nth-child(3), .quote-table td:nth-child(5) { text-align: right; font-variant-numeric: tabular-nums; }
.quote-table .cat { background: var(--surface-solid); font-weight: 700; color: var(--accent); }
.quote-table .empty { text-align: center; color: var(--text-soft); padding: 22px; }
.quote-table tfoot td { font-weight: 700; font-size: 14px; background: var(--surface-solid); }
.quote-table tfoot .grand { color: var(--accent); font-size: 16px; }

/* ---------- Footer ---------- */
.footer { text-align: center; font-size: 12px; color: var(--text-soft); padding: 18px 0 6px; }

.hidden { display: none !important; }

details { margin-top: 6px; }
summary { cursor: pointer; font-size: 13px; color: var(--accent); padding: 6px 0; user-select: none; }

/* ---------- 统一导航模块（产品 / 模具 共用） ---------- */
:root { --nav-h: 62px; }
html { scroll-behavior: smooth; }
.topnav { position: sticky; top: 0; z-index: 100; display: flex; align-items: center; justify-content: space-between; gap: 16px; height: var(--nav-h); padding: 0 22px; background: var(--surface); backdrop-filter: blur(22px) saturate(160%); -webkit-backdrop-filter: blur(22px) saturate(160%); border-bottom: 1px solid var(--border); }
.nav-brand { display: flex; align-items: center; gap: 11px; text-decoration: none; color: var(--text); }
.nav-logo { width: 38px; height: 38px; border-radius: 11px; background: var(--accent-grad); color: #fff; font-weight: 800; font-size: 15px; display: grid; place-items: center; box-shadow: 0 8px 22px rgba(47,107,255,0.35); }
.nav-brand-text { display: flex; flex-direction: column; line-height: 1.15; }
.nav-brand-text b { font-size: 15px; letter-spacing: .3px; }
.nav-brand-text span { font-size: 11px; color: var(--text-soft); }
.nav-links { display: flex; gap: 4px; background: var(--surface-solid); padding: 5px; border-radius: 999px; border: 1px solid var(--border); }
.nav-link { padding: 8px 16px; border-radius: 999px; font-size: 13px; font-weight: 600; color: var(--text-soft); text-decoration: none; transition: .2s; white-space: nowrap; }
.nav-link:hover { color: var(--accent); }
.nav-link.active { background: var(--accent-grad); color: #fff; box-shadow: 0 6px 16px rgba(47,107,255,0.30); }
.nav-actions { display: flex; align-items: center; gap: 10px; }

/* 页内分区导航（长页面） */
.section-nav { position: sticky; top: var(--nav-h); z-index: 50; display: flex; gap: 8px; flex-wrap: wrap; padding: 10px 4px; margin-bottom: 14px; background: var(--surface); backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px); border-bottom: 1px solid var(--border); }
.section-nav a { padding: 7px 14px; border-radius: 999px; font-size: 12.5px; font-weight: 600; color: var(--text-soft); text-decoration: none; border: 1px solid var(--border); background: var(--surface-solid); transition: .2s; }
.section-nav a:hover { color: var(--accent); border-color: var(--accent); }
.section-nav a.active { background: var(--accent-grad); color: #fff; border-color: transparent; }

/* 回到顶部 */
.back-top { position: fixed; right: 22px; bottom: 22px; width: 44px; height: 44px; border-radius: 50%; border: none; cursor: pointer; background: var(--accent-grad); color: #fff; font-size: 17px; display: grid; place-items: center; box-shadow: 0 10px 26px rgba(47,107,255,0.35); opacity: 0; transform: translateY(14px); pointer-events: none; transition: .3s; z-index: 90; }
.back-top.show { opacity: 1; transform: translateY(0); pointer-events: auto; }
.back-top:hover { transform: translateY(-2px); }

/* ---------- Responsive ---------- */
@media (max-width: 1080px) {
  .layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
  .form-grid, .form-grid.mini { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .form-grid, .form-grid.mini, .metric-grid, .draft-grid, .layout-grid, .quote-summary { grid-template-columns: repeat(2, 1fr); }
}