/* 万得软件网站主样式文件 - 企业级专业设计 v2.0 */

/* 系统字体栈 - 优先使用系统自带字体，提升加载速度 */
:root {
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

/* CSS变量定义 */
:root {
  /* 主色调 - 专业蓝 */
  --primary-color: #1a56db;
  --primary-dark: #0f3c9e;
  --primary-light: #3e7ded;
  --primary-50: #eff6ff;
  --primary-100: #dbeafe;
  --primary-200: #bfdbfe;
  
  /* 辅助色 - 商务金 */
  --accent-color: #c9a227;
  --accent-dark: #a68520;
  --accent-light: #e0b82e;
  --accent-50: #fffbeb;
  --accent-100: #fef3c7;
  
  /* 背景色 */
  --bg-light: #f5f7fa;
  --bg-white: #ffffff;
  --bg-gray: #e8ecf1;
  --bg-dark: #1a202c;
  --bg-gradient: linear-gradient(135deg, #1a56db 0%, #0f3c9e 100%);
  --bg-gradient-animated: linear-gradient(135deg, #1a56db 0%, #3e7ded 50%, #0f3c9e 100%);
  
  /* 文字色 */
  --text-dark: #1a202c;
  --text-gray: #4a5568;
  --text-light: #718096;
  --text-muted: #a0aec0;
  
  /* 状态色 */
  --success: #059669;
  --success-light: #10b981;
  --warning: #d97706;
  --error: #dc2626;
  
  /* 间距 - 优化版 */
  --spacing-xs: 0.5rem;
  --spacing-sm: 1rem;
  --spacing-md: 1.5rem;
  --spacing-lg: 2.5rem;
  --spacing-xl: 4rem;
  --spacing-xxl: 6rem;
  --spacing-section: 5rem;
  
  /* 圆角 */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-2xl: 32px;
  
  /* 阴影 - 更精致的阴影效果 */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
  --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
  --shadow-2xl: 0 24px 64px rgba(0, 0, 0, 0.2);
  --shadow-card: 0 1px 3px rgba(0, 0, 0, 0.06), 0 8px 16px rgba(0, 0, 0, 0.08);
  --shadow-hover: 0 12px 32px rgba(26, 86, 219, 0.18);
  --shadow-glow: 0 0 40px rgba(26, 86, 219, 0.15);
  
  /* 字体 - 升级版 */
  --font-chinese: "Microsoft YaHei", "微软雅黑", "PingFang SC", "HarmonyOS Sans", sans-serif;
  --font-english: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-display: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Microsoft YaHei", sans-serif;
  
  /* 字体大小层级 */
  --text-xs: 0.75rem;
  --text-sm: 0.875rem;
  --text-base: 1rem;
  --text-lg: 1.125rem;
  --text-xl: 1.25rem;
  --text-2xl: 1.5rem;
  --text-3xl: 2rem;
  --text-4xl: 2.5rem;
  --text-5xl: 3rem;
  --text-6xl: 3.75rem;
  
  /* 边框 */
  --border-color: #e2e8f0;
  --border-light: rgba(0, 0, 0, 0.06);
  --border-primary: rgba(26, 86, 219, 0.2);
  
  /* 过渡动画 */
  --transition-fast: 0.15s ease;
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

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

body {
  font-family: var(--font-english), var(--font-chinese);
  color: var(--text-dark);
  background-color: var(--bg-light);
  line-height: 1.7;
  font-feature-settings: "kern" 1, "liga" 1;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

a {
  color: var(--primary-color);
  text-decoration: none;
  transition: color var(--transition-base);
}

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

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

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

/* 头部导航 - 企业级设计 */
.header {
  background: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
  border-bottom: 1px solid var(--border-light);
  backdrop-filter: blur(12px);
  background: rgba(255, 255, 255, 0.95);
  transition: box-shadow var(--transition-base);
}

.header:hover {
  box-shadow: var(--shadow-md);
}

.header-content {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1rem 2rem;
  max-width: 1400px;
  margin: 0 auto;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  transition: all var(--transition-base);
}

.logo:hover {
  transform: translateX(4px);
}

.logo img {
  height: 40px;
  width: auto;
  transition: transform var(--transition-base);
}

.logo:hover img {
  transform: scale(1.05);
}

.logo-text {
  font-family: var(--font-display);
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: -0.02em;
}

.logo-domain {
  font-size: 0.8rem;
  color: var(--text-light);
  font-weight: 500;
  letter-spacing: 0.05em;
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 8px;
}

.nav-menu li a {
  color: var(--text-gray);
  font-weight: 500;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  transition: all var(--transition-base);
  font-size: 0.95rem;
  position: relative;
}

.nav-menu li a::after {
  content: '';
  position: absolute;
  bottom: 6px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--primary-color);
  transition: all var(--transition-base);
  transform: translateX(-50%);
}

.nav-menu li a:hover::after {
  width: calc(100% - 32px);
}

.nav-menu li a:hover {
  color: var(--primary-color);
  background: rgba(26, 86, 219, 0.06);
}

.nav-menu li a.active {
  color: var(--primary-color);
  background: rgba(26, 86, 219, 0.1);
  font-weight: 600;
}

.nav-menu li a.active::after {
  width: calc(100% - 32px);
}

/* 下拉菜单 */
.dropdown {
  position: relative;
}

.dropdown-menu {
  display: none;
  position: absolute;
  top: 100%;
  left: 0;
  background: var(--bg-white);
  box-shadow: var(--shadow-lg);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm);
  min-width: 200px;
  z-index: 100;
  opacity: 0;
  transform: translateY(-8px);
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
}

.dropdown:hover .dropdown-menu {
  display: block;
  opacity: 1;
  transform: translateY(0);
}

.dropdown-menu li {
  margin-bottom: var(--spacing-xs);
}

.dropdown-menu li a {
  display: block;
  padding: var(--spacing-sm);
  color: var(--text-dark);
  border-radius: var(--radius-sm);
}

.dropdown-menu li a:hover {
  background: var(--bg-light);
  color: var(--primary-color);
  transform: translateX(4px);
}

/* 移动端菜单 */
.nav-toggle {
  display: none;
  cursor: pointer;
  padding: var(--spacing-sm);
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-dark);
  margin: 5px 0;
  transition: var(--transition-base);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }
  
  .nav-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-white);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    flex-direction: column;
    gap: var(--spacing-sm);
  }
  
  .nav-menu.active {
    display: flex;
  }
  
  .dropdown-menu {
    position: static;
    box-shadow: none;
    background: var(--bg-light);
    margin-top: var(--spacing-xs);
  }
}

/* Hero区域 - 专业大气升级 */
.hero {
  background: var(--bg-gradient);
  color: white;
  padding: var(--spacing-section) var(--spacing-lg);
  text-align: center;
  position: relative;
  overflow: hidden;
  min-height: 400px;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* 动态渐变背景 */
.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(62, 125, 237, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(15, 60, 158, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 50% 80%, rgba(201, 162, 39, 0.15) 0%, transparent 40%);
  animation: gradientPulse 8s ease-in-out infinite;
}

/* 粒子效果背景 */
.hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px),
    radial-gradient(circle, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 50px 50px, 30px 30px;
  background-position: 0 0, 25px 25px;
  animation: particleFloat 20s linear infinite;
}

@keyframes gradientPulse {
  0%, 100% {
    opacity: 1;
    transform: scale(1);
  }
  50% {
    opacity: 0.8;
    transform: scale(1.05);
  }
}

@keyframes particleFloat {
  0% {
    transform: translateY(0);
  }
  100% {
    transform: translateY(-50px);
  }
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 900px;
}

.hero-title {
  font-family: var(--font-display);
  font-size: var(--text-6xl);
  font-weight: 800;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.04em;
  line-height: 1.1;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
  animation: heroTitleIn 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
  opacity: 0;
  transform: translateY(30px);
}

@keyframes heroTitleIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-subtitle {
  font-size: var(--text-xl);
  opacity: 0.95;
  margin-bottom: var(--spacing-xl);
  font-weight: 400;
  line-height: 1.6;
  animation: heroSubtitleIn 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.2s forwards;
  opacity: 0;
  transform: translateY(20px);
}

@keyframes heroSubtitleIn {
  to {
    opacity: 0.95;
    transform: translateY(0);
  }
}

.hero-actions {
  animation: heroActionsIn 0.8s cubic-bezier(0.34, 1.56, 0.64, 1) 0.4s forwards;
  opacity: 0;
  transform: translateY(20px);
}

@keyframes heroActionsIn {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 产品展示区 - 专业布局 */
.products-section {
  padding: var(--spacing-section) var(--spacing-lg);
  background: var(--bg-light);
  position: relative;
}

.products-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  text-align: center;
  margin-bottom: var(--spacing-md);
  color: var(--text-dark);
  letter-spacing: -0.03em;
}

.section-subtitle {
  font-size: var(--text-lg);
  color: var(--text-gray);
  text-align: center;
  margin-bottom: var(--spacing-section);
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.7;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.product-card {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
  position: relative;
}

.product-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--bg-gradient);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.product-card:hover::before {
  opacity: 1;
}

/* 产品卡片链接样式 */
.product-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.product-card-link:hover .product-name {
  color: var(--primary-color);
}

.product-card:hover {
  transform: translateY(-12px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-primary);
}

.product-icon {
  padding: var(--spacing-xl);
  text-align: center;
  background: linear-gradient(180deg, #fafbfc 0%, #f5f7fa 100%);
  border-bottom: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
}

.product-icon::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(26, 86, 219, 0.08) 0%, transparent 70%);
  transform: translate(-50%, -50%);
  transition: all var(--transition-slow);
}

.product-card:hover .product-icon::after {
  width: 160px;
  height: 160px;
}

.product-icon img {
  width: 88px;
  height: 88px;
  object-fit: contain;
  filter: drop-shadow(0 8px 16px rgba(0, 0, 0, 0.12));
  transition: transform var(--transition-base);
  position: relative;
  z-index: 1;
}

.product-card:hover .product-icon img {
  transform: scale(1.08);
}

.product-info {
  padding: var(--spacing-lg);
}

.product-name {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
  transition: color var(--transition-base);
}

.product-desc {
  font-size: var(--text-sm);
  color: var(--text-gray);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
}

.product-tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-xs);
  margin-bottom: var(--spacing-md);
}

.tag {
  font-size: 0.75rem;
  padding: 4px 10px;
  background: var(--bg-light);
  color: var(--text-gray);
  border-radius: 20px;
  font-weight: 500;
  transition: all var(--transition-fast);
}

.tag:hover {
  background: var(--primary-50);
  color: var(--primary-color);
}

.tag.free {
  background: rgba(16, 185, 129, 0.1);
  color: var(--success);
}

.tag.paid {
  background: rgba(245, 158, 11, 0.1);
  color: var(--accent-dark);
}

.product-actions {
  display: flex;
  gap: var(--spacing-sm);
}

/* 按钮 - 专业交互设计升级 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 28px;
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.01em;
  border: none;
  position: relative;
  overflow: hidden;
  font-family: var(--font-english), var(--font-chinese);
}

/* 按钮涟漪效果 */
.btn::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.3);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.6s ease, height 0.6s ease;
}

.btn:active::before {
  width: 300%;
  height: 300%;
}

.btn-primary {
  background: var(--bg-gradient);
  color: white;
  box-shadow: 0 4px 14px rgba(26, 86, 219, 0.35);
  background-size: 200% 200%;
  animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
  0%, 100% {
    background-position: 0% 50%;
  }
  50% {
    background-position: 100% 50%;
  }
}

.btn-primary:hover {
  background: var(--bg-gradient-animated);
  color: white;
  box-shadow: 0 6px 20px rgba(26, 86, 219, 0.45);
  transform: translateY(-3px);
}

.btn-secondary {
  background: var(--bg-white);
  color: var(--text-dark);
  border: 2px solid var(--border-color);
  box-shadow: var(--shadow-sm);
}

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

.btn-accent {
  background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-dark) 100%);
  color: white;
  box-shadow: 0 4px 14px rgba(201, 162, 39, 0.35);
}

.btn-accent:hover {
  background: linear-gradient(135deg, var(--accent-light) 0%, var(--accent-color) 100%);
  color: white;
  box-shadow: 0 6px 20px rgba(201, 162, 39, 0.45);
  transform: translateY(-3px);
}

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

.btn-ghost:hover {
  background: var(--primary-50);
  transform: translateY(-2px);
}

.btn-small {
  padding: 10px 18px;
  font-size: 0.875rem;
}

.btn-large {
  padding: 18px 36px;
  font-size: var(--text-lg);
  font-weight: 700;
  border-radius: var(--radius-lg);
}

/* 功能特点区 - 专业卡片设计 */
.features-section {
  background: var(--bg-white);
  padding: var(--spacing-section) var(--spacing-lg);
  position: relative;
}

.features-section::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
  z-index: 0;
}

.features-section > * {
  position: relative;
  z-index: 1;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.feature-card {
  text-align: center;
  padding: var(--spacing-xl);
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--bg-gradient);
  transform: scaleX(0);
  transition: transform var(--transition-base);
}

.feature-card:hover::before {
  transform: scaleX(1);
}

.feature-card:hover {
  background: var(--bg-white);
  border-color: var(--border-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-8px);
}

.feature-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto var(--spacing-lg);
  background: linear-gradient(135deg, var(--primary-50) 0%, var(--primary-100) 100%);
  border-radius: var(--radius-xl);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--transition-base);
}

.feature-card:hover .feature-icon {
  background: linear-gradient(135deg, var(--primary-100) 0%, var(--primary-200) 100%);
  transform: scale(1.1) rotate(5deg);
  box-shadow: var(--shadow-glow);
}

.feature-icon svg {
  width: 40px;
  height: 40px;
  color: var(--primary-color);
}

/* Emoji图标样式 */
.feature-icon:not(:has(svg)) {
  font-size: 2.5rem;
  line-height: 1;
}

.feature-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
  color: var(--text-dark);
}

.feature-desc {
  font-size: var(--text-base);
  color: var(--text-gray);
  line-height: 1.7;
}

/* 文章区域 - 专业内容展示 */
.articles-section {
  padding: var(--spacing-section) var(--spacing-lg);
  background: var(--bg-light);
}

.articles-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.article-card {
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: all var(--transition-base);
  border: 1px solid var(--border-light);
}

.article-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
  border-color: var(--border-primary);
}

/* 文章卡片链接样式 */
.article-card-link {
  display: block;
  text-decoration: none;
  color: inherit;
}

.article-card-link:hover .article-title {
  color: var(--primary-color);
}

.article-card-link:hover .article-cover img {
  transform: scale(1.08);
}

.article-cover {
  height: 200px;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  overflow: hidden;
  position: relative;
}

.article-cover::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 60px;
  background: linear-gradient(transparent, rgba(255, 255, 255, 0.8));
  pointer-events: none;
}

.article-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.article-content {
  padding: var(--spacing-lg);
}

.article-title {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--text-dark);
  margin-bottom: var(--spacing-sm);
  line-height: 1.5;
  transition: color var(--transition-base);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-excerpt {
  font-size: var(--text-sm);
  color: var(--text-gray);
  margin-bottom: var(--spacing-md);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.article-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.75rem;
  color: var(--text-light);
}

.article-category {
  color: var(--primary-color);
  font-weight: 500;
  background: var(--primary-50);
  padding: 4px 10px;
  border-radius: 20px;
}

/* 页脚 - 企业级设计 */
.footer {
  background: var(--bg-dark);
  color: white;
  padding: var(--spacing-section) var(--spacing-lg) var(--spacing-xl);
  position: relative;
}

.footer::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--bg-gradient);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
}

.footer-section h4 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  margin-bottom: var(--spacing-lg);
  color: white;
  letter-spacing: -0.01em;
}

.footer-section p {
  font-size: var(--text-sm);
  opacity: 0.85;
  line-height: 1.8;
  color: rgba(255, 255, 255, 0.85);
}

.footer-section a {
  color: rgba(255, 255, 255, 0.85);
  transition: all var(--transition-base);
  display: inline-block;
}

.footer-section a:hover {
  color: white;
  transform: translateX(4px);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 14px;
}

.footer-links a {
  display: block;
  padding: 4px 0;
  font-size: var(--text-sm);
}

.footer-bottom {
  text-align: center;
  padding-top: var(--spacing-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-xl);
  font-size: var(--text-sm);
  opacity: 0.7;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

/* 产品详情页 - 专业展示 */
.product-hero {
  background: var(--bg-gradient);
  color: white;
  padding: var(--spacing-section) var(--spacing-lg);
  position: relative;
  overflow: hidden;
}

.product-hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: 
    radial-gradient(circle at 20% 50%, rgba(62, 125, 237, 0.3) 0%, transparent 50%),
    radial-gradient(circle at 80% 50%, rgba(15, 60, 158, 0.3) 0%, transparent 50%);
  animation: gradientPulse 8s ease-in-out infinite;
}

.product-hero::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-image: 
    radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
  background-size: 40px 40px;
  opacity: 0.3;
}

.product-hero-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 1;
}

.product-hero-image {
  flex: 1;
  max-width: 420px;
}

.product-hero-image img {
  width: 100%;
  border-radius: var(--radius-2xl);
  box-shadow: 0 32px 64px rgba(0, 0, 0, 0.25);
  transition: transform var(--transition-slow);
}

.product-hero-image img:hover {
  transform: scale(1.02) rotate(1deg);
}

.product-hero-info {
  flex: 2;
}

.product-hero-title {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 800;
  margin-bottom: var(--spacing-lg);
  letter-spacing: -0.03em;
  line-height: 1.2;
  text-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.product-hero-desc {
  font-size: var(--text-lg);
  opacity: 0.95;
  margin-bottom: var(--spacing-xl);
  line-height: 1.8;
}

.product-hero-actions {
  display: flex;
  gap: var(--spacing-md);
  flex-wrap: wrap;
}

@media (max-width: 768px) {
  .product-hero-content {
    flex-direction: column;
    text-align: center;
  }
  
  .product-hero-image {
    max-width: 280px;
  }
  
  .product-hero-actions {
    justify-content: center;
  }
  
  .product-hero-title {
    font-size: var(--text-3xl);
  }
}

/* 功能列表 */
.features-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-lg);
  padding: var(--spacing-xl);
}

.feature-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  padding: var(--spacing-lg);
  background: var(--bg-white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
}

.feature-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--border-primary);
  transform: translateX(4px);
}

.feature-item-icon {
  width: 28px;
  height: 28px;
  color: var(--success);
  flex-shrink: 0;
  margin-top: 2px;
}

.feature-item-text {
  font-size: var(--text-base);
  color: var(--text-dark);
  line-height: 1.6;
}

/* 用户评价 - 专业展示 */
.testimonials {
  background: var(--bg-light);
  padding: var(--spacing-section) var(--spacing-lg);
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-xl);
}

.testimonial-card {
  background: var(--bg-white);
  padding: var(--spacing-xl);
  border-radius: var(--radius-xl);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border-light);
  transition: all var(--transition-base);
  position: relative;
}

.testimonial-card::before {
  content: '"';
  position: absolute;
  top: var(--spacing-md);
  left: var(--spacing-lg);
  font-size: 4rem;
  color: var(--primary-100);
  font-family: Georgia, serif;
  line-height: 1;
}

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

.testimonial-text {
  font-size: var(--text-base);
  color: var(--text-dark);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
  font-style: italic;
  position: relative;
  z-index: 1;
  padding-top: var(--spacing-md);
}

.testimonial-author {
  font-size: var(--text-sm);
  color: var(--text-gray);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.testimonial-author::before {
  content: '';
  width: 32px;
  height: 2px;
  background: var(--primary-color);
  display: inline-block;
}

/* 售后服务 - 专业服务展示 */
.service-section {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-md);
  padding: var(--spacing-xl) var(--spacing-lg);
  justify-content: center;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
}

.service-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: 12px 24px;
  background: rgba(5, 150, 105, 0.06);
  border-radius: var(--radius-lg);
  color: var(--success);
  font-size: var(--text-sm);
  font-weight: 500;
  border: 1px solid rgba(5, 150, 105, 0.12);
  transition: all var(--transition-base);
}

.service-item:hover {
  background: rgba(5, 150, 105, 0.1);
  transform: translateY(-3px);
  box-shadow: 0 4px 12px rgba(5, 150, 105, 0.15);
}

/* 产品详情介绍区域 */
.product-detail-section {
  padding: var(--spacing-2xl) 0;
  background: var(--bg-white);
}

.product-detail-content {
  max-width: 900px;
  margin: 0 auto;
}

.product-detail-intro {
  margin-bottom: var(--spacing-2xl);
}

.product-detail-intro h2 {
  font-size: var(--text-2xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

.product-detail-intro p {
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: var(--spacing-md);
}

.product-detail-intro p:last-child {
  margin-bottom: 0;
}

.product-detail-highlight {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-2xl);
}

.highlight-card {
  background: var(--bg-light);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  text-align: center;
  transition: all var(--transition-base);
}

.highlight-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
}

.highlight-icon {
  font-size: 48px;
  margin-bottom: var(--spacing-md);
}

.highlight-card h3 {
  font-size: var(--text-lg);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
  font-weight: 600;
}

.highlight-card p {
  font-size: var(--text-sm);
  color: var(--text-secondary);
  line-height: 1.6;
}

.product-detail-scenarios {
  background: var(--bg-light);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
}

.product-detail-scenarios h3 {
  font-size: var(--text-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-lg);
  font-weight: 600;
}

.product-detail-scenarios ul {
  list-style: none;
  padding: 0;
}

.product-detail-scenarios li {
  padding: var(--spacing-sm) 0;
  font-size: var(--text-base);
  color: var(--text-secondary);
  line-height: 1.6;
  position: relative;
  padding-left: var(--spacing-lg);
}

.product-detail-scenarios li::before {
  content: "•";
  position: absolute;
  left: 0;
  color: var(--primary);
  font-weight: bold;
}

@media (max-width: 768px) {
  .product-detail-highlight {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .product-detail-section {
    padding: var(--spacing-xl) 0;
  }
}

@media (max-width: 480px) {
  .product-detail-highlight {
    grid-template-columns: 1fr;
  }
}

/* 响应式调整 - 专业适配 */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  .hero-title {
    font-size: var(--text-4xl);
  }
  
  .hero-subtitle {
    font-size: var(--text-base);
  }
  
  .hero {
    padding: var(--spacing-xl) var(--spacing-md);
    min-height: 280px;
  }
  
  .products-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .articles-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .footer-content {
    grid-template-columns: 1fr;
    text-align: center;
    gap: var(--spacing-lg);
  }
  
  .product-hero-title {
    font-size: var(--text-3xl);
  }
  
  .product-hero-desc {
    font-size: var(--text-base);
  }
  
  .section-title {
    font-size: var(--text-2xl);
  }
  
  .section-subtitle {
    font-size: var(--text-sm);
  }
  
  .features-grid {
    grid-template-columns: 1fr;
    gap: var(--spacing-lg);
  }
  
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  
  /* 文章筛选按钮移动端适配 */
  .articles-filter {
    justify-content: center;
    gap: 0.5rem;
  }
  
  .filter-btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }
  
  /* 文章卡片移动端适配 */
  .article-card {
    padding: var(--spacing-md);
  }
  
  .article-card .article-title {
    font-size: 1.1rem;
  }
  
  /* 产品卡片移动端适配 */
  .product-card {
    padding: var(--spacing-md);
  }
  
  .product-name {
    font-size: 1.1rem;
  }
  
  /* 功能卡片移动端适配 */
  .feature-card {
    padding: var(--spacing-lg);
  }
  
  .feature-title {
    font-size: 1.1rem;
  }
  
  /* 导航栏移动端适配 */
  .nav-toggle {
    display: block;
    width: 30px;
    height: 24px;
    position: relative;
    cursor: pointer;
  }
  
  .nav-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background: var(--text-dark);
    border-radius: 2px;
    transition: all 0.3s ease;
  }
  
  .nav-toggle span:nth-child(1) {
    position: absolute;
    top: 0;
  }
  
  .nav-toggle span:nth-child(2) {
    position: absolute;
    top: 10px;
  }
  
  .nav-toggle span:nth-child(3) {
    position: absolute;
    top: 20px;
  }
  
  .nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg);
    top: 10px;
  }
  
  .nav-toggle.active span:nth-child(2) {
    opacity: 0;
  }
  
  .nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg);
    top: 10px;
  }
  
  /* Logo移动端适配 */
  .logo-text {
    font-size: 1.2rem;
  }
  
  .logo-domain {
    font-size: 0.7rem;
  }
  
  /* 容器移动端适配 */
  .container {
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  html {
    font-size: 13px;
  }
  
  .hero-title {
    font-size: var(--text-3xl);
  }
  
  .hero {
    min-height: 220px;
    padding: var(--spacing-lg) var(--spacing-sm);
  }
  
  .section-title {
    font-size: var(--text-xl);
  }
  
  /* 文章筛选按钮小屏适配 */
  .articles-filter {
    flex-wrap: wrap;
    gap: 0.3rem;
  }
  
  .filter-btn {
    padding: 6px 12px;
    font-size: 0.8rem;
  }
  
  /* 按钮小屏适配 */
  .btn {
    padding: 8px 16px;
    font-size: 0.85rem;
  }
  
  .btn-large {
    padding: 10px 20px;
    font-size: 0.9rem;
  }
  
  /* 页脚小屏适配 */
  .footer-section h4 {
    font-size: 1rem;
  }
  
  .footer-section p,
  .footer-links li a {
    font-size: 0.85rem;
  }
}

/* 产品帮助区域 */
.help-section {
  padding: 60px 0;
  background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
}

.help-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 30px;
  justify-content: center;
}

.help-tab {
  padding: 12px 24px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 8px;
  color: #a0aec0;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 14px;
}

.help-tab:hover {
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
}

.help-tab.active {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: #fff;
  border-color: transparent;
}

.help-content {
  background: rgba(255, 255, 255, 0.03);
  border-radius: 12px;
  padding: 30px;
  border: 1px solid rgba(255, 255, 255, 0.05);
}

.help-panel {
  display: none;
}

.help-panel.active {
  display: block;
}

.help-panel h3 {
  color: #fff;
  font-size: 20px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.help-panel h3::before {
  content: '';
  width: 4px;
  height: 20px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  border-radius: 2px;
}

.help-panel h4 {
  color: #e2e8f0;
  font-size: 16px;
  margin: 20px 0 10px;
}

.help-panel p {
  color: #a0aec0;
  line-height: 1.8;
  margin-bottom: 15px;
}

.help-panel ul, .help-panel ol {
  color: #a0aec0;
  line-height: 1.8;
  margin-bottom: 15px;
  padding-left: 20px;
}

.help-panel li {
  margin-bottom: 8px;
}

.help-panel .tip-box {
  background: rgba(102, 126, 234, 0.1);
  border: 1px solid rgba(102, 126, 234, 0.3);
  border-radius: 8px;
  padding: 15px 20px;
  margin: 20px 0;
  color: #e2e8f0;
}

.help-panel .tip-box.warning {
  background: rgba(237, 137, 54, 0.1);
  border-color: rgba(237, 137, 54, 0.3);
}

.help-panel .tip-box.success {
  background: rgba(72, 187, 120, 0.1);
  border-color: rgba(72, 187, 120, 0.3);
}

.help-panel img {
  max-width: 100%;
  border-radius: 8px;
  margin: 15px 0;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.help-panel code {
  background: rgba(255, 255, 255, 0.1);
  padding: 2px 8px;
  border-radius: 4px;
  color: #68d391;
  font-size: 14px;
}

/* 动画效果 - 平滑过渡升级 */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateX(-30px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.95);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

@keyframes floatUp {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-10px);
  }
}

.fade-in {
  animation: fadeIn 0.6s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.slide-in {
  animation: slideIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.scale-in {
  animation: scaleIn 0.5s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

/* 滚动动画类 */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.visible {
  opacity: 1;
  transform: translateY(0);
}

/* 工具类 */
.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.hidden {
  display: none;
}

.visible {
  display: block;
}

/* 高对比度模式支持 */
@media (prefers-contrast: high) {
  :root {
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.15);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.25);
    --border-light: rgba(0, 0, 0, 0.15);
  }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* 深色模式预留 */
@media (prefers-color-scheme: dark) {
  /* 可在此添加深色模式样式 */
}

/* 打印样式 */
@media print {
  .header,
  .footer,
  .btn {
    display: none;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .product-card,
  .article-card,
  .feature-card {
    break-inside: avoid;
    box-shadow: none;
    border: 1px solid #ddd;
  }
}