/* ========================================
   豆苗AI子站统一样式表
   版本：1.0
   更新日期：2026-07-10
   ======================================== */

/* CSS变量 - 浅色模式 */
:root {
  --primary-start: #22c55e;
  --primary-end: #3b82f6;
  --primary-gradient: linear-gradient(135deg, var(--primary-start) 0%, var(--primary-end) 100%);
  --bg-primary: #ffffff;
  --bg-secondary: #f9fafb;
  --bg-card: #ffffff;
  --text-primary: #1f2937;
  --text-secondary: #6b7280;
  --text-muted: #9ca3af;
  --border-color: #e5e7eb;
  --border-light: #f3f4f6;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-full: 9999px;
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2rem;
  --spacing-xl: 3rem;
  --nav-height: 64px;
}

/* CSS变量 - 深色模式 */
[data-theme="dark"] {
  --bg-primary: #111827;
  --bg-secondary: #1f2937;
  --bg-card: #1f2937;
  --text-primary: #f9fafb;
  --text-secondary: #d1d5db;
  --text-muted: #9ca3af;
  --border-color: #374151;
  --border-light: #1f2937;
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.4), 0 2px 4px -1px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.5), 0 4px 6px -2px rgba(0, 0, 0, 0.4);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji";
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  transition: background-color 0.3s ease, color 0.3s ease;
}

/* 导航栏 */
.doumiao-nav {
  position: sticky; top: 0; z-index: 1000;
  background-color: var(--bg-primary);
  border-bottom: 1px solid var(--border-color);
  height: var(--nav-height);
  display: flex; align-items: center;
  padding: 0 var(--spacing-lg);
  box-shadow: var(--shadow-sm);
}
.doumiao-nav-container {
  max-width: 1200px; width: 100%; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
}
.doumiao-nav-logo {
  display: flex; align-items: center; gap: var(--spacing-sm);
  color: var(--text-primary);
}
.doumiao-nav-logo img { height: 36px; width: auto; }
.doumiao-nav-logo-text {
  font-size: 1.125rem; font-weight: 600;
  background: var(--primary-gradient);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text;
}
.doumiao-nav-actions { display: flex; align-items: center; gap: var(--spacing-md); }
.doumiao-theme-toggle {
  background: none; border: none; cursor: pointer;
  padding: var(--spacing-xs); border-radius: var(--radius-sm);
  color: var(--text-secondary); font-size: 1.25rem;
  transition: all 0.2s ease;
  display: flex; align-items: center; justify-content: center;
}
.doumiao-theme-toggle:hover { background-color: var(--bg-secondary); color: var(--text-primary); }
.doumiao-nav-home {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.875rem; transition: color 0.2s ease;
  background: none; border: none; cursor: pointer;
  font-family: inherit;
}
.doumiao-nav-home:hover { color: var(--text-primary); }

/* Footer */
.doumiao-footer {
  background-color: var(--bg-secondary);
  border-top: 1px solid var(--border-color);
  padding: var(--spacing-lg); margin-top: var(--spacing-xl);
  text-align: center;
}
.doumiao-footer-content { max-width: 1200px; margin: 0 auto; }
.doumiao-footer-copyright { color: var(--text-muted); font-size: 0.875rem; margin-bottom: var(--spacing-sm); }
.doumiao-footer-links { display: flex; justify-content: center; gap: var(--spacing-md); flex-wrap: wrap; }
.doumiao-footer-links a {
  color: var(--text-secondary); text-decoration: none;
  font-size: 0.875rem; transition: color 0.2s ease;
}
.doumiao-footer-links a:hover { color: var(--text-primary); }

/* 卡片 */
.doumiao-card {
  background-color: var(--bg-card); border-radius: var(--radius-md);
  box-shadow: var(--shadow-md); padding: var(--spacing-lg);
  transition: all 0.3s ease;
}
.doumiao-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }

/* 按钮 */
.doumiao-btn-primary {
  background: var(--primary-gradient); color: #ffffff;
  border: none; border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: 1rem; font-weight: 500; cursor: pointer;
  transition: all 0.2s ease; text-decoration: none; display: inline-block;
}
.doumiao-btn-primary:hover { opacity: 0.9; transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* 容器 */
.doumiao-container { max-width: 1200px; margin: 0 auto; padding: var(--spacing-lg); }

/* 响应式 */
@media (max-width: 768px) {
  :root { --spacing-lg: 1rem; --spacing-xl: 2rem; }
  .doumiao-nav { padding: 0 var(--spacing-sm); }
  .doumiao-nav-logo-text { font-size: 1rem; }
  .doumiao-nav-actions { gap: var(--spacing-sm); }
}