/* 境禾项目 - 全局样式 */

/* CSS Variables - 品牌色调 */
:root {
  /* 主色调 - 米棕色系 */
  --color-primary: #B8956B;
  --color-primary-light: #D4B896;
  --color-primary-dark: #8B7355;
  --color-primary-pale: #F5EDE3;
  
  /* 辅助色 */
  --color-secondary: #6B8E6B;
  --color-secondary-light: #A8C5A8;
  --color-secondary-pale: #E8F0E8;
  
  /* 中性色 */
  --color-white: #FFFFFF;
  --color-cream: #FAF8F5;
  --color-light-gray: #F0EDE8;
  --color-gray: #9A9590;
  --color-dark-gray: #5A5550;
  --color-black: #2C2824;
  
  /* 字体 */
  --font-primary: 'Noto Serif SC', 'Source Han Serif SC', 'SimSun', serif;
  --font-secondary: 'Noto Sans SC', 'Source Han Sans SC', 'Microsoft YaHei', sans-serif;
  
  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-full: 50%;
  
  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(44, 40, 36, 0.06);
  --shadow-md: 0 4px 16px rgba(44, 40, 36, 0.08);
  --shadow-lg: 0 8px 32px rgba(44, 40, 36, 0.12);
  
  /* 过渡 */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.3s ease;
  --transition-slow: 0.5s ease;
}

/* Reset & Base */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-secondary);
  color: var(--color-black);
  background-color: var(--color-cream);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-primary);
  font-weight: 500;
  line-height: 1.4;
}

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

ul, ol {
  list-style: none;
}

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

.container-narrow {
  max-width: 800px;
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

/* Section */
.section {
  padding: var(--spacing-xl) 0;
}

.section-title {
  text-align: center;
  margin-bottom: var(--spacing-lg);
}

.section-title h2 {
  font-size: 2.5rem;
  color: var(--color-black);
  margin-bottom: var(--spacing-xs);
}

.section-title p {
  color: var(--color-gray);
  font-size: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  font-size: 1rem;
  border-radius: var(--radius-md);
  transition: all var(--transition-normal);
  cursor: pointer;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
  background-color: transparent;
}

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

/* Cards */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-image {
  width: 100%;
  aspect-ratio: 4/3;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-md);
}

.card-title {
  font-size: 1.25rem;
  margin-bottom: var(--spacing-xs);
  color: var(--color-black);
}

.card-text {
  color: var(--color-gray);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* Grid */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-2 {
  grid-template-columns: repeat(2, 1fr);
}

.grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

@media (max-width: 992px) {
  .grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .grid-2,
  .grid-3,
  .grid-4 {
    grid-template-columns: 1fr;
  }
  
  .section-title h2 {
    font-size: 1.75rem;
  }
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-1 { margin-top: var(--spacing-xs); }
.mt-2 { margin-top: var(--spacing-sm); }
.mt-3 { margin-top: var(--spacing-md); }
.mt-4 { margin-top: var(--spacing-lg); }

.mb-1 { margin-bottom: var(--spacing-xs); }
.mb-2 { margin-bottom: var(--spacing-sm); }
.mb-3 { margin-bottom: var(--spacing-md); }
.mb-4 { margin-bottom: var(--spacing-lg); }

/* Animations */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.fade-in {
  animation: fadeIn 0.6s ease forwards;
}

/* Decorative Elements */
.divider {
  width: 60px;
  height: 2px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
  margin: var(--spacing-sm) auto;
}

.divider-vertical {
  width: 1px;
  height: 40px;
  background-color: var(--color-primary-light);
  margin: 0 auto;
}