/* ========== 全局CSS变量 ========== */
:root {
  /* 主色调 - 传统中药绿 */
  --color-primary: #2a7a4d;
  --color-primary-light: #4a9a6d;
  --color-primary-lighter: #6aba8d;
  --color-primary-dark: #1a5a3d;
  
  /* 辅助色 */
  --color-secondary: #f0f7f2;
  --color-accent: #d4a574;
  
  /* 文本颜色 */
  --color-text-primary: #2d3748;
  --color-text-secondary: #4a5568;
  --color-text-muted: #718096;
  
  /* 背景色 */
  --color-white: #ffffff;
  --color-bg-section: #f8faf9;
  --color-bg-card: #ffffff;
  
  /* 边框 */
  --color-border: #e2e8f0;
  --color-border-light: #f0f4f2;
  
  /* 空间间距 */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;
  --space-3xl: 64px;
  
  /* 字体大小 */
  --font-size-xs: 12px;
  --font-size-sm: 14px;
  --font-size-base: 16px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 48px;
  
  /* 行高 */
  --line-height-tight: 1.25;
  --line-height-base: 1.6;
  --line-height-loose: 1.8;
  
  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 24px;
  
  /* 阴影 */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 12px 48px rgba(0, 0, 0, 0.15);
  
  /* 过渡 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  
  /* 容器宽度 */
  --container-width: 1200px;
  --container-narrow: 800px;
}

/* ========== 全局基础样式 ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--color-text-primary);
  background-color: var(--color-white);
  line-height: var(--line-height-base);
  min-height: 100vh;
}

/* ========== 容器 ========== */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.container-narrow {
  width: 100%;
  max-width: var(--container-narrow);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

/* ========== 头部导航 ========== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  box-shadow: var(--shadow-md);
  z-index: 100;
  transition: all var(--transition-base);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 64px;
}

.logo {
  font-size: var(--font-size-lg);
  font-weight: 700;
  color: var(--color-primary);
  text-decoration: none;
  white-space: nowrap;
  transition: color var(--transition-fast);
}

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

/* 汉堡菜单按钮 */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: space-between;
  width: 28px;
  height: 20px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  z-index: 10;
}

.hamburger span {
  display: block;
  width: 100%;
  height: 3px;
  background-color: var(--color-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* 导航链接 */
.nav {
  display: flex;
  gap: var(--space-xl);
}

.nav-link {
  color: var(--color-text-secondary);
  text-decoration: none;
  font-size: var(--font-size-base);
  font-weight: 500;
  transition: all var(--transition-fast);
  position: relative;
  padding: var(--space-sm) 0;
}

.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-primary);
  transition: width var(--transition-base);
}

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

.nav-link:hover::after {
  width: 100%;
}

.nav.active {
  display: flex;
  position: fixed;
  top: 64px;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--color-white);
  flex-direction: column;
  align-items: center;
  justify-content: flex-start;
  padding-top: var(--space-3xl);
  gap: var(--space-xl);
  animation: slideDown var(--transition-base);
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== Banner横幅 ========== */
.banner {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 50%, var(--color-primary-lighter) 100%);
  color: var(--color-white);
  padding: var(--space-3xl) var(--space-lg);
  padding-top: calc(64px + var(--space-3xl));
  min-height: 400px;
  display: flex;
  align-items: center;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.banner::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  opacity: 0.3;
}

.banner h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--space-xl);
  letter-spacing: 2px;
  position: relative;
}

.banner-text {
  font-size: var(--font-size-lg);
  line-height: var(--line-height-loose);
  max-width: 700px;
  margin: 0 auto var(--space-xl);
  opacity: 0.95;
  position: relative;
}

.btn {
  display: inline-block;
  background-color: var(--color-white);
  color: var(--color-primary);
  padding: var(--space-md) var(--space-2xl);
  border-radius: var(--radius-xl);
  font-weight: 600;
  text-decoration: none;
  transition: all var(--transition-base);
  position: relative;
  box-shadow: var(--shadow-md);
}

.btn:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  background-color: var(--color-secondary);
}

/* ========== 内容区块 ========== */
.section {
  padding: var(--space-3xl) var(--space-lg);
}

.section-sm {
  padding: var(--space-xl) var(--space-lg);
}

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

.section h2 {
  font-size: var(--font-size-2xl);
  color: var(--color-primary);
  margin-bottom: var(--space-xl);
  text-align: center;
  position: relative;
  padding-bottom: var(--space-md);
}

.section h2::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 60px;
  height: 3px;
  background: linear-gradient(to right, var(--color-primary), var(--color-primary-light));
  border-radius: var(--radius-sm);
}

/* ========== 企业简介区域优化 ========== */
.about-section {
  display: grid;
  gap: var(--space-xl);
}

.about-text {
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  font-size: var(--font-size-base);
  max-width: 800px;
  margin: 0 auto;
}

.mission-statement {
  font-size: var(--font-size-xl);
  color: var(--color-primary);
  font-weight: 600;
  text-align: center;
  padding: var(--space-lg);
  background-color: var(--color-secondary);
  border-radius: var(--radius-lg);
  border: 2px solid var(--color-primary-light);
  margin: var(--space-lg) auto;
  max-width: 600px;
}

.disclaimer {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  text-align: center;
  padding: var(--space-md);
  background-color: rgba(42, 122, 77, 0.05);
  border-radius: var(--radius-md);
  border-left: 3px solid var(--color-primary-light);
  margin: var(--space-lg) auto;
  max-width: 700px;
}

.official-identity {
  background-color: var(--color-white);
  border-radius: var(--radius-xl);
  padding: var(--space-xl);
  margin-top: var(--space-xl);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--color-border);
}

.official-identity h3 {
  color: var(--color-primary);
  font-size: var(--font-size-lg);
  margin-bottom: var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.official-identity h3::before {
  content: "✓";
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border-radius: 50%;
  font-size: var(--font-size-sm);
}

.official-identity p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
  margin-bottom: var(--space-md);
}

.official-identity ul {
  list-style: none;
  padding: 0;
}

.official-identity li {
  padding: var(--space-sm) 0;
  color: var(--color-text-secondary);
  display: flex;
  align-items: flex-start;
  gap: var(--space-md);
  border-bottom: 1px solid var(--color-border-light);
}

.official-identity li:last-child {
  border-bottom: none;
}

.official-identity li strong {
  color: var(--color-text-primary);
  min-width: 100px;
}

/* ========== 联系区域优化 ========== */
.contact-section {
  background-color: var(--color-bg-section);
}

.contact-info {
  display: grid;
  gap: var(--space-lg);
  max-width: 700px;
  margin: 0 auto;
}

.contact-detail {
  background-color: var(--color-white);
  padding: var(--space-lg);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  gap: var(--space-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--color-border);
  transition: all var(--transition-base);
}

.contact-detail:hover {
  transform: translateX(8px);
  border-color: var(--color-primary-light);
  box-shadow: var(--shadow-md);
}

/* 不同联系项的图标 */
.contact-detail:nth-child(1)::before {
  content: "🏢";
  font-size: 20px;
}

.contact-detail:nth-child(2)::before {
  content: "🌐";
  font-size: 20px;
}

.contact-detail:nth-child(3)::before {
  content: "📍";
  font-size: 20px;
}

.contact-detail:nth-child(4)::before {
  content: "📞";
  font-size: 20px;
}

.contact-detail:nth-child(5)::before {
  content: "📋";
  font-size: 20px;
}

.contact-detail:nth-child(6)::before {
  content: "🌿";
  font-size: 20px;
}

.contact-detail strong {
  color: var(--color-primary);
  font-weight: 600;
}

.contact-detail span {
  color: var(--color-text-secondary);
}

.contact-detail a {
  color: var(--color-primary);
  text-decoration: none;
}

.contact-detail a:hover {
  text-decoration: underline;
}

/* ========== 页脚 ========== */
.footer {
  background-color: var(--color-primary-dark);
  color: var(--color-white);
  padding: var(--space-xl) var(--space-lg);
}

.footer-content {
  text-align: center;
  font-size: var(--font-size-sm);
}

.footer-link {
  color: var(--color-white);
  text-decoration: none;
  opacity: 0.8;
  transition: opacity var(--transition-fast);
}

.footer-link:hover {
  opacity: 1;
  text-decoration: underline;
}

/* ========== 图片弹窗 ========== */
.img-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.9);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.img-modal.show {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  position: relative;
  max-width: 90%;
  max-height: 90%;
}

.modal-content img {
  max-width: 100%;
  max-height: 90vh;
  border-radius: var(--radius-lg);
}

.close-btn {
  position: absolute;
  top: -40px;
  right: 0;
  color: var(--color-white);
  font-size: 36px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.close-btn:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

/* 点击文本样式 */
.clickable-text {
  color: var(--color-accent);
  cursor: pointer;
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.clickable-text:hover {
  color: #e4b584;
}

/* ========== 图片弹窗（history.html专用） ========== */
.image-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.95);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  backdrop-filter: blur(10px);
}

.image-modal.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 30px;
  color: var(--color-white);
  font-size: 48px;
  cursor: pointer;
  width: 60px;
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.1);
  transition: all var(--transition-base);
}

.modal-close-btn:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.modal-img-container {
  max-width: 85%;
  max-height: 85vh;
}

.modal-img-container img {
  max-width: 100%;
  max-height: 85vh;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-xl);
}

/* ========== 产品网格 ========== */
.product-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-xl);
}

.product-card {
  background-color: var(--color-white);
  padding: var(--space-xl);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base);
  border: 1px solid var(--color-border);
  cursor: pointer;
  text-align: center;
}

.product-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-xl);
  border-color: var(--color-primary-light);
}

.product-icon {
  width: 72px;
  height: 72px;
  background-color: var(--color-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto var(--space-lg);
  font-size: 36px;
  transition: all var(--transition-base);
}

.product-card:hover .product-icon {
  background-color: var(--color-primary);
  transform: scale(1.1);
}

.product-icon span {
  color: var(--color-primary);
  font-weight: bold;
  font-size: var(--font-size-lg);
}

.product-card:hover .product-icon span {
  color: var(--color-white);
}

.product-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--space-md);
  font-size: var(--font-size-xl);
}

.product-card p {
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
}

.product-card .view-detail {
  display: inline-block;
  margin-top: var(--space-md);
  color: var(--color-primary);
  font-weight: 500;
  font-size: var(--font-size-sm);
}

/* ========== 产品弹窗 ========== */
.product-modal {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.85);
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  backdrop-filter: blur(5px);
}

.product-modal.show {
  opacity: 1;
  pointer-events: auto;
}

.product-modal-content {
  background: var(--color-white);
  border-radius: var(--radius-2xl);
  max-width: 700px;
  width: 92%;
  max-height: 88vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-xl);
  animation: modalFadeIn 0.3s ease;
}

.product-modal-header {
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  color: var(--color-white);
  padding: var(--space-xl) var(--space-2xl);
  display: flex;
  justify-content: space-between;
  align-items: center;
  border-radius: var(--radius-2xl) var(--radius-2xl) 0 0;
  position: sticky;
  top: 0;
  z-index: 10;
}

.product-modal-header h3 {
  margin: 0;
  font-size: var(--font-size-xl);
  font-weight: 600;
  letter-spacing: 1px;
}

.product-modal-close {
  color: var(--color-white);
  font-size: 32px;
  cursor: pointer;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  transition: all var(--transition-base);
}

.product-modal-close:hover {
  background-color: rgba(255, 255, 255, 0.2);
  transform: rotate(90deg);
}

.product-modal-body {
  padding: var(--space-2xl);
}

.product-modal-body h4 {
  color: var(--color-primary);
  border-bottom: 2px solid var(--color-primary-light);
  padding-bottom: var(--space-sm);
  margin: var(--space-xl) 0 var(--space-md);
  font-size: var(--font-size-lg);
  font-weight: 600;
}

.product-modal-body h4:first-child {
  margin-top: 0;
}

.product-desc {
  color: var(--color-text-secondary);
  line-height: var(--line-height-loose);
  margin-bottom: var(--space-lg);
  font-size: var(--font-size-base);
}

.product-features {
  list-style: none;
  padding: 0;
  margin: var(--space-lg) 0;
}

.product-features li {
  color: var(--color-text-secondary);
  line-height: var(--line-height-base);
  padding-left: var(--space-xl);
  position: relative;
  margin-bottom: var(--space-md);
  padding-top: var(--space-xs);
  padding-bottom: var(--space-xs);
}

.product-features li::before {
  content: "✓";
  color: var(--color-primary);
  position: absolute;
  left: 0;
  font-weight: bold;
  font-size: var(--font-size-lg);
  width: 24px;
  height: 24px;
  background-color: var(--color-secondary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
}

.report-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-md);
  background-color: var(--color-secondary);
  color: var(--color-primary);
  padding: var(--space-md) var(--space-xl);
  border-radius: var(--radius-lg);
  text-decoration: none;
  font-weight: 500;
  margin-top: var(--space-lg);
  transition: all var(--transition-base);
  border: 2px solid transparent;
  font-size: var(--font-size-base);
}

.report-link:hover {
  background-color: var(--color-primary);
  color: var(--color-white);
  border-color: var(--color-primary);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.report-link::before {
  content: "📄";
  font-size: var(--font-size-lg);
}

/* ========== 回到顶部按钮 ========== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background-color: var(--color-primary);
  color: var(--color-white);
  border: none;
  border-radius: 50%;
  font-size: 24px;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-base);
  box-shadow: var(--shadow-lg);
  z-index: 50;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-to-top:hover {
  background-color: var(--color-primary-light);
  transform: translateY(-4px);
}

/* ========== 滚动动画 ========== */
.reveal-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s ease;
}

.reveal-on-scroll.revealed {
  opacity: 1;
  transform: translateY(0);
}

/* ========== 响应式设计 ========== */
@media (max-width: 1024px) {
  :root {
    --space-xl: 24px;
    --space-2xl: 36px;
    --space-3xl: 48px;
  }
  
  .container {
    padding: 0 var(--space-lg);
  }
}

@media (max-width: 768px) {
  :root {
    --font-size-3xl: 36px;
    --font-size-2xl: 28px;
    --font-size-xl: 20px;
  }
  
  .hamburger {
    display: flex;
  }
  
  .nav {
    display: none;
  }
  
  .header-content {
    height: 56px;
  }
  
  .logo {
    font-size: var(--font-size-base);
  }
  
  .banner {
    padding: var(--space-2xl) var(--space-md);
    padding-top: calc(56px + var(--space-2xl));
    min-height: 300px;
  }
  
  .banner h1 {
    font-size: var(--font-size-2xl);
  }
  
  .banner-text {
    font-size: var(--font-size-base);
  }
  
  .section {
    padding: var(--space-2xl) var(--space-md);
  }
  
  .official-identity {
    padding: var(--space-lg);
  }
  
  .official-identity li {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-xs);
  }
  
  .contact-detail {
    padding: var(--space-md);
    flex-direction: column;
    align-items: flex-start;
    text-align: left;
  }
  
  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    font-size: 20px;
  }
  
  /* 产品网格响应式 */
  .product-grid {
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: var(--space-lg);
  }
}

@media (max-width: 480px) {
  .product-grid {
    grid-template-columns: 1fr;
    gap: var(--space-lg);
  }
  
  .product-card {
    padding: var(--space-lg);
  }
  
  .product-modal-content {
    width: 95%;
  }
  
  .product-modal-body {
    padding: var(--space-lg);
  }
}

@media (max-width: 480px) {
  :root {
    --font-size-3xl: 28px;
    --font-size-2xl: 22px;
    --font-size-xl: 18px;
  }
  
  .banner {
    min-height: 250px;
  }
  
  .btn {
    padding: var(--space-sm) var(--space-lg);
    font-size: var(--font-size-sm);
  }
  
  .mission-statement {
    font-size: var(--font-size-lg);
    padding: var(--space-md);
  }
}