/* ========================================
   特防科技 广州站 - 品牌蓝专业样式表 v2
   ======================================== */

:root {
  --primary: #1E40AF;      /* 品牌深蓝 */
  --primary-light: #3B82F6; /* 亮蓝 */
  --accent: #0EA5E9;        /* 辅助青 */
  --bg: #FFFFFF;
  --bg-gray: #F8FAFC;
  --text: #1E293B;
  --text-light: #64748B;
  --border: #E2E8F0;
  --shadow: 0 1px 3px rgba(0,0,0,0.1);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
  --radius: 8px;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}

/* 导航栏 */
header {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: 72px;
}

.logo {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
  text-decoration: none;
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 18px;
}

nav ul {
  display: flex;
  list-style: none;
  gap: 32px;
}

nav a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  font-size: 15px;
  transition: color 0.2s;
}

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

.nav-cta {
  background: var(--primary);
  color: white !important;
  padding: 10px 20px;
  border-radius: 6px;
}

.nav-cta:hover {
  background: var(--primary-light);
}

/* 移动端菜单 */
.mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  font-size: 24px;
  cursor: pointer;
}

/* Hero区 */
.hero {
  background: linear-gradient(180deg, var(--bg-gray) 0%, var(--bg) 100%);
  padding: 80px 24px;
  text-align: center;
}

.hero-container {
  max-width: 900px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-block;
  background: rgba(30, 64, 175, 0.1);
  color: var(--primary);
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 20px;
  color: var(--text);
}

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

.hero-subtitle {
  font-size: 18px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto 32px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  justify-content: center;
}

.btn {
  padding: 14px 28px;
  border-radius: 6px;
  font-size: 16px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s;
}

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

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

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

.btn-secondary:hover {
  background: var(--bg-gray);
}

/* 信任指标 */
.trust-bar {
  background: var(--bg);
  padding: 40px 24px;
  border-bottom: 1px solid var(--border);
}

.trust-container {
  max-width: 1000px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  text-align: center;
}

.trust-item {
  padding: 20px;
}

.trust-number {
  font-size: 36px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 8px;
}

.trust-label {
  font-size: 14px;
  color: var(--text-light);
}

/* 内容区块 */
.section {
  padding: 80px 24px;
}

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

.section-container {
  max-width: 1200px;
  margin: 0 auto;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
}

.section-header h2 {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 16px;
}

.section-header p {
  font-size: 18px;
  color: var(--text-light);
  max-width: 600px;
  margin: 0 auto;
}

/* 服务卡片 */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: white;
  padding: 32px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: all 0.3s;
}

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

.service-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin-bottom: 20px;
}

.service-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
}

.service-card p {
  color: var(--text-light);
  font-size: 15px;
  margin-bottom: 16px;
}

.service-price {
  font-size: 24px;
  font-weight: 700;
  color: var(--primary);
}

/* 新闻卡片 */
.news-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.news-card {
  background: white;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s;
}

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

.news-image {
  height: 180px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 48px;
  color: white;
}

.news-content {
  padding: 24px;
}

.news-tag {
  display: inline-block;
  background: var(--bg-gray);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 600;
  margin-bottom: 12px;
}

.news-card h3 {
  font-size: 18px;
  margin-bottom: 12px;
  line-height: 1.4;
}

.news-card h3 a {
  color: var(--text);
  text-decoration: none;
}

.news-card h3 a:hover {
  color: var(--primary);
}

.news-meta {
  font-size: 13px;
  color: var(--text-light);
}

/* 案例卡片 */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}

.case-card {
  background: white;
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  border-left: 4px solid var(--primary);
}

.case-type {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 12px;
}

.case-card h3 {
  font-size: 16px;
  margin-bottom: 12px;
  color: var(--text);
}

.case-card p {
  font-size: 14px;
  color: var(--text-light);
  line-height: 1.5;
}

.case-tag {
  display: inline-block;
  background: var(--bg-gray);
  padding: 4px 10px;
  border-radius: 4px;
  font-size: 12px;
  color: var(--text-light);
  margin-top: 12px;
}

/* 知识百科 */
.knowledge-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.knowledge-item {
  background: white;
  padding: 24px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  align-items: flex-start;
  gap: 16px;
  transition: all 0.3s;
}

.knowledge-item:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-md);
}

.knowledge-icon {
  width: 44px;
  height: 44px;
  background: var(--bg-gray);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.knowledge-item h3 {
  font-size: 16px;
  margin-bottom: 6px;
}

.knowledge-item h3 a {
  color: var(--text);
  text-decoration: none;
}

.knowledge-item h3 a:hover {
  color: var(--primary);
}

.knowledge-item p {
  font-size: 14px;
  color: var(--text-light);
}

/* 预约表单 */
.booking-section {
  background: var(--bg-gray);
}

.booking-container {
  max-width: 600px;
  margin: 0 auto;
}

.booking-form {
  background: white;
  padding: 40px;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-weight: 600;
  margin-bottom: 8px;
  font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s;
}

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

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

/* 页脚 */
footer {
  background: var(--text);
  color: white;
  padding: 60px 24px 30px;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  max-width: 300px;
}

.footer-brand .logo {
  color: white;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  line-height: 1.6;
}

.footer-column h4 {
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 16px;
  text-transform: uppercase;
  letter-spacing: 1px;
}

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

.footer-column li {
  margin-bottom: 10px;
}

.footer-column a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s;
}

.footer-column a:hover {
  color: white;
}

.footer-contact p {
  font-size: 14px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 8px;
}

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.1);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255,255,255,0.5);
}

/* 文章详情 */
.article-container {
  max-width: 800px;
  margin: 0 auto;
  padding: 60px 24px;
}

.article-header {
  margin-bottom: 40px;
  padding-bottom: 32px;
  border-bottom: 1px solid var(--border);
}

.article-header h1 {
  font-size: 32px;
  line-height: 1.3;
  margin-bottom: 16px;
}

.article-meta {
  font-size: 14px;
  color: var(--text-light);
}

.article-content {
  font-size: 16px;
  line-height: 1.8;
}

.article-content h2 {
  font-size: 24px;
  margin: 32px 0 16px;
}

.article-content p {
  margin-bottom: 16px;
}

.article-content ul,
.article-content ol {
  margin: 16px 0;
  padding-left: 24px;
}

.article-content li {
  margin-bottom: 8px;
}

/* 面包屑 */
.breadcrumb {
  padding: 16px 24px;
  background: var(--bg-gray);
  font-size: 14px;
}

.breadcrumb-container {
  max-width: 1200px;
  margin: 0 auto;
}

.breadcrumb a {
  color: var(--text-light);
  text-decoration: none;
}

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

.breadcrumb span {
  color: var(--text-light);
  margin: 0 8px;
}

/* 响应式 */
@media (max-width: 1024px) {
  .services-grid,
  .news-grid,
  .knowledge-list {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .cases-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .trust-container {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .footer-container {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .nav-container {
    padding: 0 16px;
  }
  
  nav ul {
    display: none;
  }
  
  .mobile-menu-btn {
    display: block;
  }
  
  .hero {
    padding: 60px 16px;
  }
  
  .hero h1 {
    font-size: 32px;
  }
  
  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }
  
  .section {
    padding: 60px 16px;
  }
  
  .section-header h2 {
    font-size: 28px;
  }
  
  .services-grid,
  .news-grid,
  .cases-grid,
  .knowledge-list {
    grid-template-columns: 1fr;
  }
  
  .form-row {
    grid-template-columns: 1fr;
  }
  
  .footer-container {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  
  .footer-bottom {
    flex-direction: column;
    gap: 12px;
    text-align: center;
  }
}

/* 辅助类 */
.text-center {
  text-align: center;
}

.mb-0 {
  margin-bottom: 0;
}

.mt-4 {
  margin-top: 16px;
}