/* ============================================
   GreenPort GPIE.NET - Design Tokens & Reset
   ============================================ */

:root {
  --color-primary: #1e3a8a;
  --color-primary-light: #3b5bdb;
  --color-accent: #ffd43b;
  --color-accent-hover: #fcc419;
  --color-success: #2f9e44;
  --color-success-bg: #f0fff4;
  --color-danger: #e03131;
  --color-danger-bg: #fff5f5;
  --color-warning: #e67700;
  --color-purple: #7048e8;
  --color-teal: #0c8599;

  --color-text: #1a1a2e;
  --color-text-secondary: #555;
  --color-text-muted: #666;
  --color-text-light: #999;
  --color-link: #3b5bdb;

  --color-bg: #f8f9ff;
  --color-bg-alt: #f0f4ff;
  --color-bg-card: #ffffff;
  --color-border: #e0e7ff;
  --color-border-light: #eaeef6;

  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-2xl: 24px;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.04);
  --shadow-md: 0 2px 16px rgba(0,0,0,0.05);
  --shadow-lg: 0 4px 24px rgba(0,0,0,0.06);
  --shadow-xl: 0 8px 32px rgba(0,0,0,0.1);
  --shadow-hover: 0 8px 28px rgba(59,91,219,0.12);
  --shadow-accent: 0 8px 24px rgba(255,212,59,0.35);

  --font-zh: 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  --font-en: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, sans-serif;

  --nav-height: 64px;
  --section-py: 80px;
  --section-px: 60px;
  --container-max: 1200px;

  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;

  --z-nav: 100;
  --z-modal: 200;
  --z-toast: 300;
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-en);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body[lang="zh"] {
  font-family: var(--font-zh);
}

a {
  color: var(--color-link);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-primary);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}