/* ================================
   巡检平台官网 - 全局样式
   ================================ */

/* CSS 变量定义 */
:root {
  /* 主色调 */
  --color-primary: #1890ff;
  --color-primary-dark: #096dd9;
  --color-primary-light: #40a9ff;

  /* 辅助色 - 绿色系（巡检/安全） */
  --color-success: #52c41a;
  --color-success-light: #73d13d;

  /* 中性色 */
  --color-text: #262626;
  --color-text-secondary: #595959;
  --color-text-light: #8c8c8c;
  --color-border: #d9d9d9;
  --color-border-light: #f0f0f0;
  --color-bg: #ffffff;
  --color-bg-light: #fafafa;
  --color-bg-gray: #f5f5f5;

  /* 间距 */
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 48px;
  --spacing-xl: 80px;

  /* 圆角 */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* 阴影 */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);

  /* 容器宽度 */
  --container-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB',
    'Microsoft YaHei', 'Helvetica Neue', Helvetica, Arial, sans-serif;
  font-size: 14px;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
}

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

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

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

ul, ol {
  list-style: none;
}

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

/* 通用按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all 0.3s ease;
  border: none;
  outline: none;
}

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

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

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

.btn-secondary:hover {
  background: var(--color-primary);
  color: #fff;
}

.btn-success {
  background: var(--color-success);
  color: #fff;
}

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

/* 章节通用样式 */
.section {
  padding: var(--spacing-xl) 0;
}

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

.section-title h2 {
  font-size: 32px;
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
}

.section-title p {
  font-size: 16px;
  color: var(--color-text-secondary);
}

/* 卡片 */
.card {
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  padding: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s ease;
}

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

/* ================================
   导航栏
   ================================ */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--color-bg);
  box-shadow: var(--shadow-sm);
  z-index: 1000;
  height: 64px;
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 600;
  color: var(--color-primary);
}

.navbar-brand img {
  height: 32px;
}

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

.navbar-menu a {
  color: var(--color-text);
  font-weight: 500;
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  transition: all 0.3s ease;
}

.navbar-menu a:hover,
.navbar-menu a.active {
  color: var(--color-primary);
  background: rgba(24, 144, 255, 0.1);
}

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

/* 移动端导航 */
.navbar-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 10px;
}

.navbar-toggle span {
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: all 0.3s ease;
}

/* ================================
   首页 - Hero 区域
   ================================ */
.hero {
  padding-top: calc(64px + var(--spacing-xl));
  padding-bottom: var(--spacing-xl);
  background: linear-gradient(135deg, #e6f7ff 0%, #fff7e6 100%);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(24, 144, 255, 0.1) 0%, transparent 70%);
  border-radius: 50%;
}

.hero .container {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.hero-content {
  flex: 1;
  position: relative;
  z-index: 1;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--spacing-sm);
  line-height: 1.2;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero p {
  font-size: 18px;
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  max-width: 500px;
}

.hero-btns {
  display: flex;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-lg);
}

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

.hero-tag {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--color-text-secondary);
}

.hero-tag::before {
  content: '✓';
  color: var(--color-success);
  font-weight: bold;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  position: relative;
  z-index: 1;
}

.hero-image img {
  max-width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

/* ================================
   功能亮点
   ================================ */
.features {
  background: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.feature-card {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
}

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto var(--spacing-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
  border-radius: var(--radius-lg);
  font-size: 28px;
  color: #fff;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: var(--spacing-xs);
}

.feature-card p {
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* ================================
   产品演示
   ================================ */
.demo {
  background: var(--color-bg-light);
}

.demo-content {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
}

.demo-text {
  flex: 1;
}

.demo-text h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.demo-text p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
}

.demo-text ul {
  margin-bottom: var(--spacing-md);
}

.demo-text li {
  padding: 8px 0;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.demo-text li::before {
  content: '●';
  color: var(--color-primary);
}

.demo-image {
  flex: 1.5;
}

.demo-image img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ================================
   客户案例
   ================================ */
.cases {
  background: var(--color-bg);
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
}

.case-card {
  overflow: hidden;
}

.case-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: var(--color-bg-gray);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-light);
  font-size: 48px;
}

.case-info {
  padding: var(--spacing-sm);
}

.case-info h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.case-info p {
  font-size: 13px;
  color: var(--color-text-secondary);
}

/* ================================
   定价方案
   ================================ */
.pricing {
  background: var(--color-bg-light);
}

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-md);
  align-items: start;
}

.pricing-card {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  background: var(--color-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  position: relative;
}

.pricing-card.featured {
  border: 2px solid var(--color-primary);
  transform: scale(1.05);
  box-shadow: var(--shadow-md);
}

.pricing-card.featured::before {
  content: '最受欢迎';
  position: absolute;
  top: -12px;
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-primary);
  color: #fff;
  padding: 4px 16px;
  border-radius: 12px;
  font-size: 12px;
}

.pricing-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.pricing-price {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-xs);
}

.pricing-price span {
  font-size: 14px;
  font-weight: 400;
  color: var(--color-text-secondary);
}

.pricing-desc {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border-light);
}

.pricing-features {
  text-align: left;
  margin-bottom: var(--spacing-md);
}

.pricing-features li {
  padding: 8px 0;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
}

.pricing-features li::before {
  content: '✓';
  color: var(--color-success);
  font-weight: bold;
}

/* ================================
   合作伙伴
   ================================ */
.partners {
  background: var(--color-bg);
  padding: var(--spacing-lg) 0;
}

.partners-grid {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.partner-logo {
  width: 120px;
  height: 50px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-gray);
  border-radius: var(--radius-md);
  color: var(--color-text-light);
  font-weight: 600;
}

/* ================================
   底部
   ================================ */
.footer {
  background: #1a1a2e;
  color: #fff;
  padding: var(--spacing-xl) 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.footer-brand h3 {
  font-size: 20px;
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary-light);
}

.footer-brand p {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
  line-height: 1.8;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
  color: #fff;
}

.footer-column ul li {
  margin-bottom: 8px;
}

.footer-column a {
  color: rgba(255, 255, 255, 0.7);
  font-size: 13px;
}

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

.footer-bottom {
  padding-top: var(--spacing-md);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  color: rgba(255, 255, 255, 0.5);
  font-size: 13px;
}

/* ================================
   页面通用样式
   ================================ */

/* 页面头部 */
.page-header {
  padding-top: calc(64px + var(--spacing-lg));
  padding-bottom: var(--spacing-lg);
  background: linear-gradient(135deg, #e6f7ff 0%, #fff7e6 100%);
  text-align: center;
}

.page-header h1 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  font-size: 16px;
  color: var(--color-text-secondary);
}

/* 功能详情页 */
.feature-detail {
  padding: var(--spacing-xl) 0;
}

.feature-block {
  display: flex;
  align-items: center;
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.feature-block:nth-child(even) {
  flex-direction: row-reverse;
}

.feature-block-img {
  flex: 1;
}

.feature-block-img img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.feature-block-content {
  flex: 1;
}

.feature-block-content h3 {
  font-size: 24px;
  font-weight: 600;
  margin-bottom: var(--spacing-sm);
}

.feature-block-content p {
  color: var(--color-text-secondary);
  margin-bottom: var(--spacing-sm);
}

.feature-block-content ul {
  margin-top: var(--spacing-sm);
}

.feature-block-content li {
  padding: 6px 0;
  color: var(--color-text);
  display: flex;
  align-items: center;
  gap: 8px;
}

.feature-block-content li::before {
  content: '✓';
  color: var(--color-success);
}

/* 案例详情 */
.case-detail {
  padding: var(--spacing-xl) 0;
}

.case-hero {
  margin-bottom: var(--spacing-lg);
}

.case-hero img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.case-meta {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-md);
  color: var(--color-text-secondary);
}

.case-content h2 {
  font-size: 24px;
  margin: var(--spacing-md) 0 var(--spacing-sm);
}

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

/* 联系表单 */
.contact-section {
  padding: var(--spacing-xl) 0;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
}

.contact-form {
  background: var(--color-bg);
  padding: var(--spacing-lg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

.contact-form h3 {
  font-size: 20px;
  margin-bottom: var(--spacing-md);
}

.form-group {
  margin-bottom: var(--spacing-sm);
}

.form-group label {
  display: block;
  margin-bottom: 6px;
  font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14px;
  transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  outline: none;
  border-color: var(--color-primary);
}

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

.contact-info h3 {
  font-size: 20px;
  margin-bottom: var(--spacing-md);
}

.contact-info-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  margin-bottom: var(--spacing-md);
}

.contact-info-icon {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg-light);
  border-radius: var(--radius-md);
  color: var(--color-primary);
  font-size: 18px;
}

.contact-info-text h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-info-text p {
  color: var(--color-text-secondary);
  font-size: 14px;
}

/* ================================
   响应式设计
   ================================ */
@media (max-width: 992px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

  .hero-content {
    order: 2;
  }

  .hero-image {
    order: 1;
    margin-bottom: var(--spacing-md);
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero p {
    max-width: 100%;
  }

  .hero-btns {
    justify-content: center;
  }

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

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

  .demo-content {
    flex-direction: column;
  }

  .demo-image {
    order: -1;
  }
}

@media (max-width: 768px) {
  :root {
    --spacing-xl: 48px;
  }

  .navbar-menu {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    flex-direction: column;
    padding: var(--spacing-sm);
    box-shadow: var(--shadow-md);
  }

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

  .navbar-toggle {
    display: flex;
  }

  .section-title h2 {
    font-size: 28px;
  }

  .features-grid,
  .cases-grid,
  .pricing-grid {
    grid-template-columns: 1fr;
  }

  .pricing-card.featured {
    transform: none;
  }

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

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

  .feature-block,
  .feature-block:nth-child(even) {
    flex-direction: column;
  }

  .hero h1 {
    font-size: 28px;
  }

  .hero-btns {
    flex-direction: column;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--spacing-sm);
  }

  .btn {
    padding: 8px 16px;
    font-size: 13px;
  }

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