/* ============================================
   古耕今作 - 生态农业官网样式
   ============================================ */

/* CSS 变量 - 农业主题色彩系统 */
:root {
  /* 主色调 - 绿色系 */
  --color-primary: #2d5016;
  --color-primary-light: #4a7c59;
  --color-primary-lighter: #8fbc8f;
  --color-primary-bg: #f0f7f0;

  /* 辅助色 - 大地色系 */
  --color-secondary: #8b7355;
  --color-secondary-light: #a89279;

  /* 中性色 */
  --color-text: #333333;
  --color-text-light: #666666;
  --color-white: #ffffff;
  --color-bg: #fafdf8;
  --color-border: #e0e8dc;

  /* 间距 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 2rem;
  --spacing-lg: 4rem;
  --spacing-xl: 6rem;

  /* 字体 */
  --font-main: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
  --font-heading: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;

  /* 阴影 */
  --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.1);
  --shadow-lg: 0 8px 24px rgba(0,0,0,0.12);

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
}

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

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

body {
  font-family: var(--font-main);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color 0.3s ease;
}

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

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--color-primary);
  line-height: 1.3;
  margin-bottom: var(--spacing-sm);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }

p {
  margin-bottom: var(--spacing-sm);
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
  background-color: var(--color-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  padding: var(--spacing-sm) 0;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.navbar-brand .logo-text {
  font-size: 1.5rem;
  font-weight: bold;
  color: var(--color-primary);
}

.navbar-brand .logo-sub {
  font-size: 0.875rem;
  color: var(--color-text-light);
}

.navbar-nav {
  display: flex;
  list-style: none;
  gap: var(--spacing-md);
  align-items: center;
}

.navbar-nav a {
  color: var(--color-text);
  font-weight: 500;
  padding: var(--spacing-xs) 0;
  position: relative;
  transition: color 0.3s ease;
}

.navbar-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width 0.3s ease;
}

.navbar-nav a:hover,
.navbar-nav a.active {
  color: var(--color-primary);
}

.navbar-nav a:hover::after,
.navbar-nav a.active::after {
  width: 100%;
}

/* 移动端菜单按钮 */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 1.5rem;
  color: var(--color-primary);
  cursor: pointer;
}

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

.container-narrow {
  max-width: 900px;
}

/* ============================================
   英雄区域
   ============================================ */
.hero {
  background: linear-gradient(135deg, var(--color-primary-bg) 0%, var(--color-white) 100%);
  padding: var(--spacing-xl) 0;
  text-align: center;
}

/* 品牌标题 - 古耕今作 */
.brand-title {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
  margin-bottom: var(--spacing-lg);
  padding: var(--spacing-lg) 0;
}

.brand-char {
  font-family: 'KaiTi', 'STKaiti', 'SimSun', serif;
  font-size: 10rem;
  font-weight: bold;
  color: transparent;
  background-size: cover;
  background-position: center;
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  cursor: pointer;
  transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
  display: inline-block;
  line-height: 1.1;
  position: relative;
}

/* 悬停时显示的图片背景 */
.brand-char::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 160px;
  height: 160px;
  transform: translate(-50%, -50%);
  background-size: cover;
  background-position: center;
  opacity: 0;
  transition: opacity 0.4s ease;
  border-radius: 8px;
  z-index: -1;
}

.brand-char:nth-child(1) { background-image: url('../image/ggjz-img/gu.jpg'); }
.brand-char:nth-child(2) { background-image: url('../image/ggjz-img/geng.jpg'); }
.brand-char:nth-child(3) { background-image: url('../image/ggjz-img/jin.jpg'); }
.brand-char:nth-child(4) { background-image: url('../image/ggjz-img/zuo.jpg'); }

.brand-char:nth-child(1)::before { background-image: url('../image/ggjz-img/gu.jpg'); }
.brand-char:nth-child(2)::before { background-image: url('../image/ggjz-img/geng.jpg'); }
.brand-char:nth-child(3)::before { background-image: url('../image/ggjz-img/jin.jpg'); }
.brand-char:nth-child(4)::before { background-image: url('../image/ggjz-img/zuo.jpg'); }

.brand-char:hover {
  transform: scale(1.3) translateY(-10px);
  text-shadow: 0 4px 8px rgba(0,0,0,0.3);
}

.brand-char:hover::before {
  opacity: 0.4;
}

/* 响应式调整 */
@media (max-width: 768px) {
  .brand-title {
    gap: 1rem;
    padding: var(--spacing-md) 0;
  }
  
  .brand-char {
    font-size: 6rem;
  }
  
  .brand-char::before {
    width: 100px;
    height: 100px;
  }
  
  .brand-char:hover {
    transform: scale(1.2) translateY(-5px);
  }
}

@media (max-width: 480px) {
  .brand-title {
    gap: 0.5rem;
  }
  
  .brand-char {
    font-size: 4.5rem;
  }
  
  .brand-char::before {
    width: 80px;
    height: 80px;
  }
}

.hero h1 {
  font-size: 3rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-primary);
}

.hero .subtitle {
  font-size: 1.25rem;
  color: var(--color-text-light);
  max-width: 700px;
  margin: 0 auto var(--spacing-md);
}

.hero .hero-image {
  max-width: 800px;
  margin: var(--spacing-md) auto 0;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.hero .hero-image img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

/* ============================================
   区块通用样式
   ============================================ */
.section {
  padding: var(--spacing-lg) 0;
}

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

.section-title h2 {
  font-size: 2rem;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

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

.section-alt {
  background-color: var(--color-primary-bg);
}

/* ============================================
   卡片
   ============================================ */
.card {
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

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

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

.card-text {
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* 卡片网格 */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-md);
}

/* ============================================
   内容布局
   ============================================ */
.content-section {
  padding: var(--spacing-lg) 0;
}

.content-section .content-wrapper {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-lg);
  align-items: center;
}

.content-section .content-wrapper.reverse {
  direction: rtl;
}

.content-section .content-wrapper.reverse > * {
  direction: ltr;
}

.content-section .content-image {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-md);
}

.content-section .content-image img {
  width: 100%;
  height: auto;
  display: block;
}

.content-section .content-text h3 {
  margin-bottom: var(--spacing-sm);
}

.content-section .content-text p {
  color: var(--color-text-light);
  line-height: 1.8;
}

/* ============================================
   特性列表
   ============================================ */
.features-list {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.feature-item {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.feature-content h4 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.feature-content p {
  color: var(--color-text-light);
  font-size: 0.95rem;
  margin-bottom: 0;
}

/* ============================================
   时间线
   ============================================ */
.timeline {
  position: relative;
  padding-left: var(--spacing-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background-color: var(--color-primary-lighter);
}

.timeline-item {
  position: relative;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px dashed var(--color-border);
}

.timeline-item:last-child {
  border-bottom: none;
  margin-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-lg) - 5px);
  top: 8px;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-primary);
  border: 3px solid var(--color-primary-lighter);
}

.timeline-year {
  font-weight: bold;
  color: var(--color-primary);
  font-size: 1.1rem;
  margin-bottom: var(--spacing-xs);
}

.timeline-content {
  color: var(--color-text-light);
  line-height: 1.7;
}

/* ============================================
   图片画廊
   ============================================ */
.gallery {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.gallery-item {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform 0.3s ease;
}

.gallery-item:hover {
  transform: scale(1.02);
}

.gallery-item img {
  width: 100%;
  height: 200px;
  object-fit: cover;
}

.gallery-caption {
  padding: var(--spacing-sm);
  background-color: var(--color-white);
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-text-light);
}

/* ============================================
   按钮
   ============================================ */
.btn {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-align: center;
  transition: all 0.3s ease;
  cursor: pointer;
  border: none;
  font-size: 1rem;
}

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

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

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

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

/* ============================================
   循环系统图示
   ============================================ */
.cycle-diagram {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.cycle-item {
  background-color: var(--color-primary-bg);
  color: var(--color-primary);
  padding: var(--spacing-xs) var(--spacing-sm);
  border-radius: var(--radius-sm);
  font-weight: 500;
  text-align: center;
  min-width: 120px;
}

.cycle-arrow {
  font-size: 1.5rem;
  color: var(--color-primary-lighter);
}

/* ============================================
   联系信息
   ============================================ */
.contact-info {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-md);
}

.contact-item {
  display: flex;
  gap: var(--spacing-sm);
  padding: var(--spacing-md);
  background-color: var(--color-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
}

.contact-details h4 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.contact-details p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ============================================
   页脚
   ============================================ */
.footer {
  background-color: var(--color-primary);
  color: var(--color-white);
  padding: var(--spacing-lg) 0 var(--spacing-md);
  margin-top: auto;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
}

.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--spacing-sm);
  font-size: 1.1rem;
}

.footer-section p,
.footer-section li {
  color: rgba(255,255,255,0.8);
  font-size: 0.95rem;
}

.footer-section ul {
  list-style: none;
}

.footer-section ul li {
  margin-bottom: var(--spacing-xs);
}

.footer-section ul a {
  color: rgba(255,255,255,0.8);
}

.footer-section ul a:hover {
  color: var(--color-white);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.6);
  font-size: 0.9rem;
}

/* ============================================
   页面标题横幅
   ============================================ */
.page-banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: var(--spacing-lg) 0;
  text-align: center;
}

.page-banner h1 {
  color: var(--color-white);
  font-size: 2.5rem;
  margin-bottom: var(--spacing-xs);
}

.page-banner p {
  color: rgba(255,255,255,0.9);
  font-size: 1.1rem;
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 992px) {
  .content-section .content-wrapper {
    grid-template-columns: 1fr;
    gap: var(--spacing-md);
  }

  .content-section .content-wrapper.reverse {
    direction: ltr;
  }

  .hero h1 {
    font-size: 2.5rem;
  }
}

@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  .menu-toggle {
    display: block;
  }

  .navbar-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background-color: var(--color-white);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-md);
    gap: var(--spacing-sm);
  }

  .navbar-nav.active {
    display: flex;
  }

  .hero h1 {
    font-size: 2rem;
  }

  .hero .subtitle {
    font-size: 1.1rem;
  }

  h1 { font-size: 2rem; }
  h2 { font-size: 1.75rem; }

  .section {
    padding: var(--spacing-md) 0;
  }

  .card-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 var(--spacing-sm);
  }

  .hero {
    padding: var(--spacing-md) 0;
  }

  .page-banner {
    padding: var(--spacing-md) 0;
  }
}