:root {
    --bg: #F3F4F6; --panel: #FFFFFF; --border: #D1D5DB; --border-hover: #9CA3AF;
    --text-main: #111827; --text-muted: #4B5563; --input-bg: #FFFFFF;
    --accent: #059669; --accent-dim: rgba(5, 150, 105, 0.15); --accent-glow: rgba(5, 150, 105, 0.3);
    --alert: #DC2626; --alert-dim: rgba(220, 38, 38, 0.15); --alert-glow: rgba(220, 38, 38, 0.3);
    --track-disabled: #E5E7EB; --mask-bg: rgba(255, 255, 255, 0.7); --watermark-color: rgba(0, 0, 0, 0.04);
    --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.06); --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05); --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-mono: "JetBrains Mono", "Consolas", "Courier New", monospace;
    --radius-sm: 4px; --transition-snappy: all 0.2s cubic-bezier(0.175, 0.885, 0.32, 1.2); --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  }

  [data-theme="dark"] {
    --bg: #111827; --panel: #1F2937; --border: #374151; --border-hover: #6B7280;
    --text-main: #F9FAFB; --text-muted: #9CA3AF; --input-bg: #111827;
    --accent: #10B981; --track-disabled: #374151; --mask-bg: rgba(31, 41, 55, 0.8); --watermark-color: rgba(255, 255, 255, 0.03);
    --shadow-inset: inset 0 2px 4px 0 rgba(0, 0, 0, 0.3); --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3); --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4);
  }

  * { margin: 0; padding: 0; box-sizing: border-box; }
  body { font-family: var(--font-sans); background: var(--bg); color: var(--text-main); min-height: 100vh; line-height: 1.5; transition: background 0.3s; }

  @keyframes pulseOk { 0% { box-shadow: 0 0 0 0 var(--accent-glow); } 70% { box-shadow: 0 0 0 6px rgba(5, 150, 105, 0); } 100% { box-shadow: 0 0 0 0 rgba(5, 150, 105, 0); } }
  @keyframes pulseWarn { 0% { box-shadow: 0 0 0 0 var(--alert-glow); } 70% { box-shadow: 0 0 0 8px rgba(220, 38, 38, 0); } 100% { box-shadow: 0 0 0 0 rgba(220, 38, 38, 0); } }

  .header-sys-wrap { position: sticky; top: 0; z-index: 100; background: var(--mask-bg); backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px); padding: 20px 24px 0 24px; border-bottom: 2px solid var(--text-main); margin-bottom: 24px; transition: var(--transition-smooth); }
  .header-sys { max-width: 960px; margin: 0 auto; padding-bottom: 12px; display: grid; grid-template-columns: minmax(0, 1fr); gap: 10px; align-items: start; }
  .sys-title { font-family: var(--font-mono); font-size: 1.2rem; font-weight: 800; color: var(--text-main); letter-spacing: -0.5px; min-width: 0; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
  .sys-title::before { content: "DS_ "; color: var(--accent); }
  
  .status-bar { font-family: var(--font-sans); font-size: 0.85rem; display: grid; grid-template-columns: auto minmax(0, 1fr) auto auto; align-items: center; gap: 12px; font-weight: 600; min-width: 0; white-space: nowrap; }
  #statusText { min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .status-dot { width: 10px; height: 10px; border-radius: 50%; transition: var(--transition-smooth); background: var(--border); }
  .status-dot.ok { background: var(--accent); animation: pulseOk 2s infinite cubic-bezier(0.4, 0, 0.6, 1); }
  .status-dot.warn { background: var(--alert); animation: pulseWarn 1.2s infinite cubic-bezier(0.4, 0, 0.6, 1); }
  .combo-count { color: var(--text-muted); font-family: var(--font-mono); font-weight: normal; flex-shrink: 0;}

  .container { max-width: 960px; margin: 0 auto; display: grid; gap: 16px; padding: 0 24px 40px 24px; }
  
  .panel { background: var(--panel); border: 1px solid var(--border); padding: 24px; border-radius: var(--radius-sm); box-shadow: var(--shadow-sm); transition: var(--transition-smooth); }
  .panel:hover { border-color: var(--border-hover); box-shadow: var(--shadow-md); transform: translateY(-1px); }
  .panel-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 24px; border-bottom: 1px dashed var(--border); padding-bottom: 12px; flex-wrap: wrap; gap: 10px;}
  .panel-title { font-size: 0.95rem; font-weight: 700; color: var(--text-main); }
  .panel-title span { color: var(--text-muted); margin-right: 6px; font-family: var(--font-mono); background: var(--bg); padding: 2px 6px; border-radius: 2px;}
  
  .btn-sys { background: var(--panel); border: 1px solid var(--border); color: var(--text-main); font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600; padding: 6px 12px; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-snappy); box-shadow: var(--shadow-sm);}
  .btn-sys:hover { border-color: var(--text-main); background: var(--bg); }
  .btn-sys:active { box-shadow: var(--shadow-inset); transform: translateY(2px) scale(0.98); }

  .base-config-row { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 24px; flex-wrap: wrap; gap: 20px; }
  .discrete-row { flex: 1; min-width: 200px; }
  .discrete-label { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 10px; display: block; font-weight: 600; }
  .discrete-group { display: flex; flex-wrap: wrap; gap: 8px; }
  
  .opt-btn { background: var(--panel); border: 1px solid var(--border); color: var(--text-muted); font-family: var(--font-mono); font-size: 0.85rem; font-weight: 600; padding: 6px 16px; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-snappy); }
  .opt-btn.feasible { color: var(--text-main); border-color: var(--border-hover); box-shadow: var(--shadow-sm);}
  .opt-btn.feasible:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-1px); box-shadow: 0 4px 6px var(--accent-dim); }
  .opt-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); box-shadow: inset 0 2px 4px rgba(0,0,0,0.2); transform: translateY(1px); }
  .opt-btn.disabled { opacity: 0.5; cursor: not-allowed; box-shadow: none; border-color: transparent; background: repeating-linear-gradient(45deg, var(--bg), var(--bg) 6px, var(--track-disabled) 6px, var(--track-disabled) 12px); color: var(--text-muted); }

  .sys-loss-group { display: flex; gap: 16px; background: var(--bg); padding: 12px 16px; border: 1px solid var(--border); border-radius: var(--radius-sm); width: 100%; flex-wrap: wrap; }
  .loss-item { display: flex; flex-direction: column; gap: 6px; }
  .loss-item label { font-size: 0.75rem; color: var(--text-muted); font-weight: 600;}
  .input-base { background: var(--input-bg); border: 1px solid var(--border); color: var(--text-main); font-family: var(--font-mono); font-variant-numeric: tabular-nums; border-radius: var(--radius-sm); box-shadow: var(--shadow-inset); transition: var(--transition-smooth); outline: none; }
  .input-base:focus { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-dim), var(--shadow-inset); transform: translateY(-1px); }
  
  .loss-input { font-size: 0.95rem; font-weight: bold; padding: 4px 8px; width: 70px; }
  .advanced-settings { margin-bottom: 24px; border: 1px dashed var(--border-hover); border-radius: var(--radius-sm); background: var(--bg); overflow: hidden; }
  .advanced-summary { list-style: none; cursor: pointer; display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 14px 16px; }
  .advanced-summary::-webkit-details-marker { display: none; }
  .advanced-labels { display: flex; flex-direction: column; gap: 4px; min-width: 0; }
  .advanced-title { font-size: 0.86rem; font-weight: 700; color: var(--text-main); }
  .advanced-hint { font-size: 0.75rem; color: var(--text-muted); }
  .advanced-caret { color: var(--text-muted); font-size: 1rem; transition: transform 0.2s ease; }
  .advanced-settings[open] .advanced-caret { transform: rotate(180deg); }
  .advanced-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; padding: 0 16px 16px; }
  .advanced-block { background: var(--panel); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 14px 16px; display: flex; flex-direction: column; gap: 12px; }
  .advanced-block-wide { grid-column: 1 / -1; }
  .advanced-block-title { font-size: 0.8rem; font-weight: 700; color: var(--text-main); }
  .advanced-note { font-size: 0.72rem; color: var(--text-muted); }
  .advanced-pair-grid { display: flex; gap: 16px; flex-wrap: wrap; }
  .advanced-input { width: 88px; }
  .num-input { font-size: 1.1rem; font-weight: bold; text-align: right; padding: 4px 8px; width: 90px; color: var(--accent); }
  
  .relief-input { font-size: 1.3rem; font-weight: 800; padding: 2px 6px; width: 80px; text-align: right; color: var(--accent); border-color: var(--accent); background: var(--accent-dim); }
  .relief-input:focus { background: var(--input-bg); }

  .param-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .param-box { display: flex; flex-direction: column; gap: 8px; }
  .param-head { display: flex; justify-content: space-between; align-items: baseline; }
  .param-name { font-size: 0.85rem; font-weight: 600; }
  .input-wrap { display: flex; align-items: baseline; gap: 6px; }
  .unit-label { font-size: 0.8rem; color: var(--text-muted); font-weight: 600;}
  
  input[type="range"] { -webkit-appearance: none; width: 100%; height: 6px; outline: none; margin: 12px 0 8px; background: var(--border); border-radius: 3px; }
  input[type="range"]::-webkit-slider-thumb { -webkit-appearance: none; width: 18px; height: 18px; background: var(--panel); border: 2px solid var(--text-main); cursor: pointer; border-radius: 50%; box-shadow: 0 1px 3px rgba(0,0,0,0.2); transition: var(--transition-snappy); }
  input[type="range"]::-webkit-slider-thumb:hover { border-color: var(--accent); box-shadow: 0 2px 8px var(--accent-glow); transform: scale(1.15); }
  .range-limits { display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); }
  
  .dashboard { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
  .dash-group-title { grid-column: 1 / -1; font-size: 0.85rem; font-weight: 700; border-bottom: 2px solid var(--border); padding-bottom: 4px; margin-top: 16px; }
  .dash-group-title:first-child { margin-top: 0; }
  .dash-cell { background: var(--panel); padding: 14px 16px; border-radius: var(--radius-sm); border: 1px solid var(--border); box-shadow: 0 1px 2px rgba(0,0,0,0.02); display: flex; flex-direction: column; justify-content: space-between; transition: var(--transition-snappy); }
  .dash-cell:hover { border-color: var(--accent); box-shadow: 0 4px 12px var(--accent-dim); transform: translateY(-2px); }
  .dash-label { font-size: 0.75rem; color: var(--text-muted); margin-bottom: 6px; font-weight: 600; transition: color 0.2s;}
  .dash-cell:hover .dash-label { color: var(--accent); }
  .dash-val-wrap { display: flex; align-items: baseline; gap: 6px; }
  .dash-val { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: 1.3rem; font-weight: 800; transition: color 0.3s; }
  .dash-val.highlight { color: var(--accent); }
  .dash-val.warning { color: var(--alert); }
  .dash-unit { font-size: 0.75rem; color: var(--text-muted); font-weight: 600; white-space: nowrap; }
  .dash-unit.warning { color: var(--alert); }
  
  .export-actions { display: flex; gap: 8px; flex-wrap: wrap; }
  .btn-export { background: var(--text-main); color: var(--panel); border: 1px solid var(--text-main); font-family: var(--font-sans); font-size: 0.8rem; font-weight: 600; padding: 6px 14px; border-radius: var(--radius-sm); cursor: pointer; transition: var(--transition-snappy); }
  .btn-export:hover:not(:disabled) { box-shadow: var(--shadow-md); transform: translateY(-1px); opacity: 0.9;}
  .btn-export:active:not(:disabled) { transform: translateY(2px) scale(0.95); box-shadow: none; }
  .btn-export:disabled { opacity: 0.4; cursor: not-allowed; background: var(--text-muted); border-color: var(--text-muted); }
  .btn-export.loading { cursor: wait; pointer-events: none; border-color: var(--accent); background: var(--accent); }
  
  .report-wrapper { position: relative; border-radius: var(--radius-sm); overflow: hidden; margin-top: 16px; }

  .report-card { 
    background-color: var(--panel);
    background-image: linear-gradient(var(--bg) 1px, transparent 1px), linear-gradient(90deg, var(--bg) 1px, transparent 1px);
    background-size: 20px 20px;
    border: 2px solid var(--text-main); 
    border-radius: var(--radius-sm); padding: 32px; position: relative; overflow: hidden; display: block; 
    color: var(--text-main); 
  }
  
  .report-card::before {
    content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; pointer-events: none; z-index: 0;
    background-image: url("data:image/svg+xml,%3Csvg width='240' height='160' xmlns='http://www.w3.org/2000/svg'%3E%3Ctext x='50%25' y='50%25' font-size='22' fill='rgba(0,0,0,0.04)' font-family='sans-serif' font-weight='800' text-anchor='middle' dominant-baseline='middle' transform='rotate(-15, 120, 80)'%3E无锡道森传动%3C/text%3E%3C/svg%3E");
  }
  [data-theme="dark"] .report-card::before {
    background-image: url("data:image/svg+xml,%3Csvg width='240' height='160' xmlns='http://www.w3.org/2000/svg'%3E%3Ctext x='50%25' y='50%25' font-size='22' fill='rgba(255,255,255,0.03)' font-family='sans-serif' font-weight='800' text-anchor='middle' dominant-baseline='middle' transform='rotate(-15, 120, 80)'%3E无锡道森传动%3C/text%3E%3C/svg%3E");
  }

  .report-card > * { position: relative; z-index: 1; }

  .report-stamp { 
    position: absolute; top: 30px; right: 30px; border: 3px solid var(--accent); color: var(--accent); 
    font-family: var(--font-sans); font-size: 1.6rem; font-weight: 900; padding: 8px 20px; 
    border-radius: 4px; pointer-events: none; opacity: 0; z-index: 99; 
    transform: rotate(-15deg) scale(1);
  }
  .report-stamp.show { animation: stampSmash 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275) forwards; animation-delay: 0.2s; }
  @keyframes stampSmash { 
    0% { opacity: 0; transform: scale(3) rotate(-15deg); } 
    50% { opacity: 1; transform: scale(0.9) rotate(-15deg); } 
    100% { opacity: 0.85; transform: scale(1) rotate(-15deg); } 
  }

  .report-header { border-bottom: 2px solid var(--text-main); padding-bottom: 12px; margin-bottom: 24px; background: var(--mask-bg); }
  .report-title { font-size: 1.3rem; font-weight: 800; letter-spacing: 1px; color: var(--text-main); }
  .report-id { font-family: var(--font-mono); font-size: 0.8rem; color: var(--text-muted); margin-top: 4px; }
  
  .report-core { display: flex; gap: 24px; margin-bottom: 24px; background: var(--panel); padding: 20px; border: 1px solid var(--border); box-shadow: var(--shadow-sm); }
  .core-item { flex: 1; }
  .core-label { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 6px; font-weight: 600; }
  .core-value { font-family: var(--font-mono); font-variant-numeric: tabular-nums; font-size: 2rem; font-weight: 800; color: var(--text-main); }
  .core-value span { font-size: 0.9rem; color: var(--text-muted); margin-left: 6px; font-weight: 600; }
  
  .report-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; margin-bottom: 20px; background: var(--mask-bg); }
  .report-section-title { font-size: 0.9rem; font-weight: 700; color: var(--text-main); border-bottom: 2px solid var(--border); padding-bottom: 6px; margin-bottom: 12px; }
  .kv-list { display: flex; flex-direction: column; gap: 10px; }
  .kv-row { display: flex; justify-content: space-between; align-items: baseline; font-size: 0.85rem; }
  .kv-k { color: var(--text-muted); font-weight: 600; }
  .kv-v { color: var(--text-main); font-weight: 700; text-align: right; font-family: var(--font-mono); font-variant-numeric: tabular-nums; }
  .kv-v.safe { color: var(--accent); }
  .kv-v.warning { color: var(--alert); }
  
  .report-footer { margin-top: 24px; padding-top: 16px; border-top: 1px dashed var(--border-hover); display: flex; justify-content: space-between; font-family: var(--font-mono); font-size: 0.75rem; color: var(--text-muted); background: var(--mask-bg); transition: color 0.3s;}

  @media (max-width: 768px) {
    .header-sys-wrap { padding: 16px 16px 0 16px; }
    .header-sys { gap: 8px; }
    .sys-title { font-size: 1.05rem; }
    .status-bar { grid-template-columns: auto minmax(0, 1fr) auto auto; gap: 8px; font-size: 0.78rem; }
    #themeToggle { padding: 4px 6px !important; font-size: 0.68rem !important; margin-left: 0 !important; }
    .param-grid { grid-template-columns: 1fr; }
    .dashboard { grid-template-columns: repeat(2, 1fr); }
    .base-config-row { flex-direction: column; }
    .advanced-grid { grid-template-columns: 1fr; }
    .advanced-summary { align-items: flex-start; }
    .advanced-pair-grid { flex-direction: column; gap: 12px; }
    .report-grid { grid-template-columns: 1fr; gap: 16px;}
    .report-core { flex-direction: column; }
  }