/* 律时达Web - 主样式（现代SaaS风格） */

/* CSS变量 */
:root {
  --primary-color: #1A1A2E;
  --primary-light: #2D2D44;
  --primary-dark: #0F0F1A;
  --secondary-color: #FF6B35;
  --secondary-light: #FF8A5C;
  --secondary-dark: #E55A2B;
  --success-color: #10b981;
  --danger-color: #ef4444;
  --warning-color: #f59e0b;
  --text-primary: #1e293b;
  --text-secondary: #64748b;
  --text-muted: #94a3b8;
  --bg-primary: #ffffff;
  --bg-secondary: #f8fafc;
  --bg-dark: #1A1A2E;
  --border-color: #e2e8f0;
  --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: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置样式 */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-secondary);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  text-decoration: none;
  color: inherit;
}

/* 容器 */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* 头部导航 */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--primary-color);
}

.logo-icon {
  font-size: 1.6rem;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  color: var(--text-secondary);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary-color);
  background: var(--bg-secondary);
}

.nav-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
  color: white !important;
  padding: 10px 20px;
  border-radius: var(--radius-lg);
  font-weight: 600;
  transition: var(--transition);
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.nav-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 0.95rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-lg);
  cursor: pointer;
  transition: var(--transition);
}

.btn-primary {
  background: linear-gradient(135deg, var(--secondary-color), var(--secondary-dark));
  color: white;
  box-shadow: 0 4px 12px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 53, 0.4);
}

.btn-secondary {
  background: var(--bg-primary);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
  background: var(--bg-secondary);
  border-color: var(--text-muted);
}

.btn-outline {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
}

.btn-outline:hover {
  background: var(--primary-color);
  color: white;
}

.btn-lg {
  padding: 16px 32px;
  font-size: 1rem;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

/* 主内容区 */
.main-content {
  flex: 1;
  min-height: calc(100vh - 72px);
  padding: 40px 0 80px;
}

.page-title {
  font-size: 2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 32px;
  text-align: center;
}

/* 通用表单样式 */
.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
  font-size: 0.9rem;
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  font-size: 1rem;
  border: 2px solid var(--border-color);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  transition: var(--transition);
}

.form-control:focus {
  outline: none;
  border-color: var(--secondary-color);
  box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.1);
}

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

select.form-control {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 18px;
  padding-right: 48px;
}

/* 结果卡片 */
.result-card {
  background: var(--bg-primary);
  border-radius: var(--radius-xl);
  padding: 32px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-md);
  border: 1px solid rgba(0, 0, 0, 0.03);
}

.result-card h3 {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-color);
  margin-bottom: 20px;
  padding-bottom: 16px;
  border-bottom: 2px solid var(--bg-secondary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.result-card h3 .icon {
  font-size: 1.4rem;
}

/* 加载动画 */
.spinner {
  display: inline-block;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  border-top-color: white;
  animation: spin 0.8s linear infinite;
}

.spinner-dark {
  border-color: rgba(0, 0, 0, 0.1);
  border-top-color: var(--secondary-color);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* 页脚 */
.footer {
  background: var(--bg-dark);
  color: rgba(255, 255, 255, 0.7);
  padding: 60px 0 30px;
  text-align: center;
}

.footer p {
  font-size: 0.9rem;
}

/* 工具类 */
.text-center { text-align: center; }
.mt-1 { margin-top: 8px; }
.mt-2 { margin-top: 16px; }
.mt-3 { margin-top: 24px; }
.mb-1 { margin-bottom: 8px; }
.mb-2 { margin-bottom: 16px; }
.mb-3 { margin-bottom: 24px; }

/* 响应式 */
@media (max-width: 768px) {
  .container {
    padding: 0 16px;
  }
  
  .header-content {
    height: 64px;
  }
  
  .nav {
    gap: 4px;
  }
  
  .nav-link {
    padding: 8px 12px;
    font-size: 0.9rem;
  }
  
  .nav-btn {
    padding: 8px 14px;
    font-size: 0.9rem;
  }
  
  .page-title {
    font-size: 1.5rem;
  }
  
  .result-card {
    padding: 24px;
    border-radius: var(--radius-lg);
  }
}

/* ===== 扩展样式 ===== */

/* 微动效变量 */
:root {
  --animate-speed-fast: 0.15s;
  --animate-speed-normal: 0.3s;
  --animate-speed-slow: 0.5s;
  --animate-bounce: cubic-bezier(0.68, -0.55, 0.265, 1.55);
  --animate-smooth: cubic-bezier(0.4, 0, 0.2, 1);
  
  /* 阴影层级 */
  --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.12);
  --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.15);
  
  /* 渐变背景 */
  --gradient-primary: linear-gradient(135deg, #FF6B35, #FF8F5C);
  --gradient-dark: linear-gradient(135deg, #0f0f1a, #1a1a2e);
  --gradient-card: linear-gradient(180deg, #ffffff, #f8fafc);
}

/* 渐变工具类 */
.bg-gradient-dark { background: var(--gradient-dark); }
.bg-gradient-primary { background: var(--gradient-primary); }
.bg-gradient-card { background: var(--gradient-card); }

/* 阴影工具类 */
.shadow-xs { box-shadow: var(--shadow-xs); }
.shadow-sm { box-shadow: var(--shadow-sm); }
.shadow-md { box-shadow: var(--shadow-md); }
.shadow-lg { box-shadow: var(--shadow-lg); }
.shadow-xl { box-shadow: var(--shadow-xl); }

/* 圆角扩展 */
.rounded-xs { border-radius: 4px; }
.rounded-sm { border-radius: 8px; }
.rounded-md { border-radius: 12px; }
.rounded-lg { border-radius: 16px; }
.rounded-xl { border-radius: 24px; }
.rounded-full { border-radius: 9999px; }

/* 动画工具类 */
.animate-fade-in { animation: fadeIn var(--animate-speed-normal) var(--animate-smooth); }
.animate-slide-up { animation: slideUp var(--animate-speed-normal) var(--animate-smooth); }
.animate-slide-down { animation: slideDown var(--animate-speed-normal) var(--animate-smooth); }
.animate-scale-in { animation: scaleIn var(--animate-speed-normal) var(--animate-bounce); }

@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes slideDown { from { opacity: 0; transform: translateY(-20px); } to { opacity: 1; transform: translateY(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }

/* 悬浮效果 */
.hover-lift { transition: transform var(--animate-speed-normal) var(--animate-smooth), box-shadow var(--animate-speed-normal) var(--animate-smooth); }
.hover-lift:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.hover-scale { transition: transform var(--animate-speed-fast) var(--animate-smooth); }
.hover-scale:hover { transform: scale(1.02); }

.hover-glow { transition: box-shadow var(--animate-speed-normal) var(--animate-smooth); }
.hover-glow:hover { box-shadow: 0 0 20px rgba(255, 107, 53, 0.3); }

/* 移动端断点优化 */
@media (max-width: 640px) {
  .container { padding: 0 12px; }
  .page-title { font-size: 1.25rem; margin-bottom: 20px; }
  .result-card { padding: 16px; border-radius: 12px; }
  .form-control { padding: 12px 14px; font-size: 15px; }
  .btn { padding: 10px 18px; font-size: 0.9rem; }
}

/* 深色模式适配（可选） */
@media (prefers-color-scheme: dark) {
  .footer { background: #0a0a12; }
}

/* 打印样式 */
@media print {
  .header, .footer, .nav-mobile-toggle { display: none; }
  .main-content { padding: 20px 0; }
}