/* ===== 全局基础样式 ===== */
:root {
  --primary: #1a1a2e;
  --secondary: #16213e;
  --accent: #e94560;
  --gold: #ffd700;
  --bg: #f5f5f5;
  --bg-card: #ffffff;
  --text: #333333;
  --text-light: #666666;
  --border: #e0e0e0;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --transition: 0.3s ease;
}

[data-theme="dark"] {
  --primary: #0d0d1a;
  --secondary: #1a1a2e;
  --bg: #121212;
  --bg-card: #1e1e2e;
  --text: #e0e0e0;
  --text-light: #b0b0b0;
  --border: #333333;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.4);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  transition: background var(--transition), color var(--transition);
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

h1, h2, h3 {
  color: var(--text);
  margin-bottom: 20px;
}

h1 {
  font-size: 2.2rem;
}

h2 {
  font-size: 1.8rem;
  text-align: center;
  margin-bottom: 40px;
  position: relative;
}

h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 3px;
  background: var(--gold);
  margin: 15px auto 0;
  border-radius: 2px;
}

h3 {
  font-size: 1.2rem;
}

p {
  color: var(--text-light);
  margin-bottom: 15px;
  font-size: 1rem;
}

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

a:hover {
  color: var(--accent);
}

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

.btn {
  display: inline-block;
  padding: 12px 28px;
  border-radius: 25px;
  font-size: 1rem;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}

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

.btn-primary:hover {
  background: #d63850;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.4);
}

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

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

/* ===== 头部导航 ===== */
#header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: var(--primary);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
}

.navbar {
  padding: 0 20px;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
  max-width: 1200px;
  margin: 0 auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--gold);
  font-size: 1.3rem;
  font-weight: bold;
}

.logo-text {
  color: var(--gold);
}

.nav-menu {
  display: flex;
  list-style: none;
  gap: 5px;
}

.nav-link {
  padding: 8px 16px;
  color: #cccccc;
  border-radius: 6px;
  transition: all var(--transition);
  font-size: 0.9rem;
}

.nav-link:hover,
.nav-link.active {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.1);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.search-toggle,
.dark-mode-toggle,
.menu-toggle {
  background: none;
  border: none;
  color: #cccccc;
  cursor: pointer;
  padding: 8px;
  border-radius: 6px;
  transition: all var(--transition);
}

.search-toggle:hover,
.dark-mode-toggle:hover,
.menu-toggle:hover {
  color: var(--gold);
  background: rgba(255, 215, 0, 0.1);
}

.menu-toggle {
  display: none;
}

.search-bar {
  display: none;
  padding: 15px 20px;
  background: var(--secondary);
  border-top: 1px solid rgba(255, 215, 0, 0.1);
}

.search-bar.active {
  display: flex;
  gap: 10px;
  max-width: 1200px;
  margin: 0 auto;
}

.search-bar input {
  flex: 1;
  padding: 10px 15px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 1rem;
}

.search-bar button {
  padding: 10px 20px;
  background: var(--gold);
  color: var(--primary);
  border: none;
  border-radius: 6px;
  cursor: pointer;
  font-weight: 600;
}

/* ===== 英雄区渐变横幅 ===== */
.hero {
  padding-top: 70px;
}

.hero-banner {
  position: relative;
  overflow: hidden;
  background: var(--primary);
}

.banner-slide {
  display: none;
}

.banner-slide.active {
  display: block;
}

.banner-slide svg {
  width: 100%;
  height: auto;
  max-height: 500px;
  object-fit: cover;
}

.banner-controls {
  position: absolute;
  bottom: 30px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 20px;
}

.banner-prev,
.banner-next {
  background: rgba(0, 0, 0, 0.5);
  color: #ffffff;
  border: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  font-size: 1.5rem;
  cursor: pointer;
  transition: all var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
}

.banner-prev:hover,
.banner-next:hover {
  background: var(--accent);
}

.banner-dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all var(--transition);
}

.dot.active {
  background: var(--gold);
  transform: scale(1.2);
}

/* ===== 面包屑导航 ===== */
.breadcrumb-section {
  padding: 15px 0;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
}

.breadcrumb {
  list-style: none;
  display: flex;
  gap: 10px;
  font-size: 0.9rem;
}

.breadcrumb li + li::before {
  content: '›';
  margin-right: 10px;
  color: var(--text-light);
}

.breadcrumb a {
  color: var(--text-light);
}

.breadcrumb span {
  color: var(--gold);
}

/* ===== 关于我们 ===== */
.about-content p {
  text-indent: 2em;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.stat-item {
  text-align: center;
  padding: 30px 20px;
  background: var(--bg-card);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.stat-number {
  display: block;
  font-size: 2.5rem;
  font-weight: bold;
  color: var(--gold);
}

.stat-label {
  font-size: 1rem;
  color: var(--text-light);
}

/* ===== 企业文化（毛玻璃卡片） ===== */
.culture-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.culture-card {
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(12px);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
  border: 1px solid rgba(255, 255, 255, 0.2);
}

[data-theme="dark"] .culture-card {
  background: rgba(30, 30, 46, 0.6);
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.culture-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.12);
}

.culture-card svg {
  margin: 0 auto 15px;
}

.culture-card h3 {
  margin-bottom: 10px;
}

/* ===== 团队介绍 ===== */
.team-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.team-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.team-card:hover {
  transform: translateY(-5px);
}

.team-card svg {
  margin: 0 auto 15px;
}

.team-card h3 {
  color: var(--gold);
  margin-bottom: 5px;
}

.team-card p {
  font-size: 0.9rem;
}

/* ===== 产品中心 ===== */
.products-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.product-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.product-card:hover {
  transform: translateY(-5px);
}

.product-card svg {
  margin: 0 auto 15px;
}

.product-card h3 {
  margin-bottom: 10px;
}

.product-card .btn {
  margin-top: 15px;
}

/* ===== 产品优势 ===== */
.advantages-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.advantage-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.advantage-card:hover {
  transform: translateY(-5px);
}

.advantage-card svg {
  margin: 0 auto 15px;
}

/* ===== 服务介绍 ===== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.service-card:hover {
  transform: translateY(-5px);
}

.service-card svg {
  margin: 0 auto 15px;
}

/* ===== 解决方案 ===== */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.solution-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.solution-card:hover {
  transform: translateY(-5px);
}

.solution-card svg {
  margin: 0 auto 15px;
}

/* ===== 应用行业 ===== */
.industries-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.industry-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.industry-card:hover {
  transform: translateY(-5px);
}

.industry-card svg {
  margin: 0 auto 15px;
}

/* ===== 数据统计 ===== */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.stats-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px 15px;
  text-align: center;
  box-shadow: var(--shadow);
}

.stats-number {
  display: block;
  font-size: 2rem;
  font-weight: bold;
  color: var(--gold);
}

.stats-label {
  font-size: 0.9rem;
  color: var(--text-light);
}

/* ===== 客户案例 ===== */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.case-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.case-card:hover {
  transform: translateY(-5px);
}

.case-card svg {
  margin: 0 auto 15px;
  border-radius: 8px;
}

/* ===== 合作伙伴 ===== */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 20px;
}

.partner-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.partner-card:hover {
  transform: scale(1.05);
}

/* ===== 客户评价 ===== */
.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.testimonial-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px;
  text-align: center;
  box-shadow: var(--shadow);
}

.testimonial-card svg {
  margin: 0 auto 15px;
  border-radius: 50%;
}

.testimonial-card p {
  font-style: italic;
}

.testimonial-card span {
  color: var(--gold);
  font-weight: 600;
}

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

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

.news-card:hover {
  transform: translateY(-5px);
}

.news-card svg {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.news-content {
  padding: 20px;
}

.news-date {
  color: var(--text-light);
  font-size: 0.85rem;
}

.news-more {
  text-align: center;
  margin-top: 30px;
}

/* ===== 最新文章 ===== */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.article-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: var(--shadow);
  transition: all var(--transition);
}

.article-card:hover {
  transform: translateY(-5px);
}

.article-card h3 {
  font-size: 1.1rem;
}

.read-more {
  color: var(--gold);
  font-weight: 600;
}

/* ===== FAQ 手风琴 ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  margin-bottom: 10px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  padding: 18px 20px;
  background: var(--bg-card);
  border: none;
  text-align: left;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: background var(--transition);
}

.faq-question:hover {
  background: rgba(255, 215, 0, 0.05);
}

.faq-question svg {
  transition: transform var(--transition);
}

.faq-question[aria-expanded="true"] svg {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  padding: 0 20px;
  background: var(--bg-card);
}

.faq-answer.open {
  max-height: 300px;
  padding: 15px 20px;
}

/* ===== HowTo 步骤 ===== */
.howto-steps {
  max-width: 700px;
  margin: 0 auto;
}

.howto-step {
  display: flex;
  gap: 20px;
  margin-bottom: 20px;
  align-items: flex-start;
}

.step-number {
  width: 40px;
  height: 40px;
  background: var(--gold);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: bold;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.step-content h3 {
  margin-bottom: 5px;
}

/* ===== 联系我们 ===== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 15px;
}

.contact-item svg {
  flex-shrink: 0;
}

.contact-form form {
  display: flex;
  flex-direction: column;
  gap: 15px;
}

.contact-form input,
.contact-form textarea {
  padding: 12px 15px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-card);
  color: var(--text);
  font-size: 1rem;
}

.contact-form textarea {
  resize: vertical;
}

/* ===== 安全说明、承诺、隐私、免责、版权 ===== */
.safety,
.commitment,
.privacy,
.disclaimer,
.copyright {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin: 20px 0;
  padding: 40px;
  box-shadow: var(--shadow);
}

.safety p,
.commitment p,
.privacy p,
.disclaimer p,
.copyright p {
  text-indent: 2em;
}

/* ===== 网站地图 ===== */
.sitemap-links {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
}

.sitemap-links a {
  padding: 8px 16px;
  background: var(--bg-card);
  border-radius: 6px;
  border: 1px solid var(--border);
  transition: all var(--transition);
}

.sitemap-links a:hover {
  background: var(--gold);
  color: var(--primary);
  border-color: var(--gold);
}

/* ===== 友情链接 ===== */
.links-list {
  display: flex;
  flex-wrap: wrap;
  gap: 15px;
  justify-content: center;
}

.links-list a {
  color: var(--text-light);
  font-size: 0.9rem;
}

/* ===== 页脚 ===== */
.footer {
  background: var(--primary);
  color: #cccccc;
  padding: 40px 0;
  margin-top: 60px;
}

.footer-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 20px;
  text-align: center;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 1.2rem;
  color: var(--gold);
}

.footer-info p {
  margin-bottom: 5px;
  font-size: 0.9rem;
  color: #999999;
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  color: #999999;
  font-size: 0.9rem;
}

.footer-links a:hover {
  color: var(--gold);
}

/* ===== 返回顶部 ===== */
.back-to-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 50px;
  height: 50px;
  background: var(--accent);
  color: #ffffff;
  border: none;
  border-radius: 50%;
  cursor: pointer;
  display: none;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
  transition: all var(--transition);
  z-index: 999;
}

.back-to-top.visible {
  display: flex;
}

.back-to-top:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(233, 69, 96, 0.6);
}

/* ===== 响应式设计 ===== */
@media (max-width: 1024px) {
  .about-stats {
    grid-template-columns: repeat(2, 1fr);
  }

  .culture-grid,
  .team-grid,
  .products-grid,
  .advantages-grid,
  .services-grid,
  .solutions-grid,
  .industries-grid,
  .articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

  .partners-grid {
    grid-template-columns: repeat(3, 1fr);
  }

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

@media (max-width: 768px) {
  .nav-menu {
    display: none;
    position: absolute;
    top: 70px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 20px;
    gap: 10px;
    border-top: 1px solid rgba(255, 215, 0, 0.1);
  }

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

  .menu-toggle {
    display: block;
  }

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

  .culture-grid,
  .team-grid,
  .products-grid,
  .advantages-grid,
  .services-grid,
  .solutions-grid,
  .industries-grid,
  .articles-grid {
    grid-template-columns: 1fr;
  }

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

  .cases-grid,
  .testimonials-grid,
  .news-grid {
    grid-template-columns: 1fr;
  }

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

  h1 {
    font-size: 1.8rem;
  }

  h2 {
    font-size: 1.5rem;
  }

  .section {
    padding: 50px 0;
  }

  .banner-slide svg {
    max-height: 300px;
  }

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

@media (max-width: 480px) {
  .about-stats {
    grid-template-columns: 1fr;
  }

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

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

  .nav-container {
    height: 60px;
  }

  .hero {
    padding-top: 60px;
  }
}