/* ===================================================================
 * metallic · 金属 · 设计令牌
 * 气质:未来感、冷峻、铬合金光泽、精密机械
 * 适合:高端科技硬件/汽车/精密仪器/男性向品牌
 * =================================================================== */
:root {
  --color-primary: #8892A6;            /* 钢灰,金属主调 */
  --color-primary-soft: rgba(136, 146, 166, 0.12);
  --color-secondary: #C0C5CE;          /* 抛光银 */

  --color-bg: #1C1E22;                /* 深炭灰底,衬托金属光泽 */
  --color-card: #2A2D33;
  --color-border: #3A3E45;

  --color-text: #E8EAED;
  --color-text-secondary: #9CA3AF;
  --color-text-muted: #6B7280;
  --color-text-disabled: #4B5563;
  --color-text-inverse: #1C1E22;

  --color-success: #10B981;
  --color-warning: #F59E0B;
  --color-error: #EF4444;
  --color-info: #3B82F6;

  /* 金属渐变(高光反射感) */
  --gradient-metal: linear-gradient(135deg, #E8EAED 0%, #8892A6 25%, #C0C5CE 50%, #8892A6 75%, #E8EAED 100%);
  --gradient-chrome: linear-gradient(180deg, #F5F6F8 0%, #8892A6 50%, #5B6470 100%);

  --font-heading: 'Rajdhani', 'PingFang SC', sans-serif;
  --font-body: 'Inter', 'PingFang SC', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --font-size-xs: 0.75rem; --font-size-sm: 0.875rem; --font-size-base: 1rem;
  --font-size-lg: 1.125rem; --font-size-xl: 1.5rem; --font-size-2xl: 2.25rem; --font-size-3xl: 3.5rem;

  --font-weight-regular: 400; --font-weight-medium: 500; --font-weight-semibold: 600; --font-weight-bold: 700;

  --line-height-tight: 1.15; --line-height-normal: 1.6; --line-height-relaxed: 1.75;
  --letter-spacing-tight: -0.02em; --letter-spacing-normal: 0; --letter-spacing-wide: 0.12em;

  --space-page-x: 24px; --space-section: 80px; --space-card-pad: 28px;

  --radius-none: 0; --radius-sm: 2px; --radius-md: 4px; --radius-lg: 8px; --radius-full: 9999px;
  --border-width-thin: 1px; --border-width-normal: 2px;

  /* 金属阴影:冷调,有光泽感 */
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.5), inset 0 1px 0 rgba(255,255,255,0.1);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.15);

  --motion-duration-fast: 150ms; --motion-duration-normal: 300ms; --motion-duration-slow: 600ms;
  --motion-easing-standard: cubic-bezier(0.4, 0, 0.2, 1);
  --motion-easing-decelerate: cubic-bezier(0, 0, 0.2, 1);
  --motion-easing-spring: cubic-bezier(0.34, 1.3, 0.64, 1);

  --container-max: 1100px; --ratio-card: 16 / 9;
  --color-code-bg: #000000; --color-code-text: #E8EAED;
}