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

:root {
  --primary: #1890FF;
  --primary-hover: #40A9FF;
  --secondary: #52C418;
  --accent: #FAAD14;
  --text-primary: #333;
  --text-secondary: #666;
  --bg-light: #FAFAFA;
  --bg-white: #FFF;
  --border: #D9D9D9;
  --border-light: #F0F0F0;
  --card-radius: 16px;
  --btn-radius: 8px;
  --input-radius: 6px;
}

body {
  font-family: 'SF Pro Display', 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: var(--text-primary);
  background-color: var(--bg-light);
  opacity: 0;
  animation: fadeIn 0.3s ease-in forwards;
}

@keyframes fadeIn {
  to { opacity: 1; }
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--primary-hover);
  text-decoration: underline;
}

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

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 80px 0;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  text-align: center;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.section-subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  text-align: center;
  margin-bottom: 48px;
}

h1 { font-size: 28px; font-weight: 700; }
h2 { font-size: 22px; font-weight: 700; }
h3 { font-size: 18px; font-weight: 500; }

.btn {
  display: inline-block;
  padding: 12px 32px;
  border-radius: var(--btn-radius);
  font-size: 16px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 2px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--primary-hover);
  border-color: var(--primary-hover);
  text-decoration: none;
  color: #fff;
}

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

.btn-secondary:hover {
  background-color: var(--primary);
  color: #fff;
  text-decoration: none;
}

.card {
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  padding: 24px;
  transition: border-color 0.2s ease;
}

.card:hover {
  border-color: var(--primary);
}

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--bg-white);
  border-bottom: 1px solid var(--border-light);
  z-index: 1000;
  height: 72px;
}

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

.navbar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.navbar-logo:hover {
  text-decoration: none;
  color: var(--text-primary);
}

.navbar-logo .logo-icon {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 700;
  font-size: 18px;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 32px;
  align-items: center;
}

.nav-links a {
  color: var(--text-primary);
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
  text-decoration: none;
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--primary);
  text-decoration: none;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 1px;
}

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}

.hamburger span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 1px;
  transition: all 0.2s ease;
}

.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);
}

.hero {
  margin-top: 72px;
  background: linear-gradient(135deg, #E6F7FF 0%, #F0F5FF 100%);
  padding: 100px 0 80px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1200 400"><rect fill="%231890FF" opacity="0.03" width="1200" height="400"/><circle cx="200" cy="100" r="80" fill="%231890FF" opacity="0.05"/><circle cx="1000" cy="300" r="120" fill="%231890FF" opacity="0.04"/></svg>') center/cover;
  pointer-events: none;
}

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

.hero h1 {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 16px;
  color: var(--text-primary);
}

.hero .subtitle {
  font-size: 20px;
  color: var(--text-secondary);
  margin-bottom: 40px;
}

.hero .subtitle .badge {
  display: inline-block;
  background: var(--secondary);
  color: #fff;
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 14px;
  font-weight: 500;
  margin-right: 8px;
}

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

.advantages {
  background: var(--bg-white);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.advantage-card {
  text-align: center;
  padding: 40px 24px;
}

.advantage-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--primary);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.advantage-icon svg {
  width: 32px;
  height: 32px;
  fill: #fff;
}

.advantage-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.advantage-card p {
  color: var(--text-secondary);
  font-size: 15px;
}

.certification {
  background: var(--bg-light);
}

.cert-content {
  display: flex;
  align-items: center;
  gap: 48px;
}

.cert-image {
  flex-shrink: 0;
  width: 280px;
  height: 360px;
  background: var(--bg-white);
  border: 1px solid var(--border);
  border-radius: var(--card-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 16px;
  padding: 24px;
}

.cert-image .cert-placeholder {
  width: 100%;
  height: 200px;
  background: var(--border-light);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
}

.cert-image .cert-placeholder svg {
  width: 48px;
  height: 48px;
  fill: var(--border);
}

.cert-info h3 {
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 16px;
}

.cert-info p {
  color: var(--text-secondary);
  margin-bottom: 12px;
  font-size: 15px;
}

.cert-info .cert-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(82, 196, 24, 0.1);
  color: var(--secondary);
  padding: 8px 16px;
  border-radius: 8px;
  font-weight: 500;
  font-size: 14px;
  margin-top: 8px;
}

.products-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-card {
  overflow: hidden;
  padding: 0;
}

.product-card .product-image {
  width: 100%;
  height: 200px;
  background: var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--text-secondary);
}

.product-card .product-image svg {
  width: 48px;
  height: 48px;
  fill: var(--border);
}

.product-card .product-body {
  padding: 24px;
}

.product-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.product-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
}

.product-card .product-link {
  font-size: 14px;
  font-weight: 500;
}

.view-all {
  text-align: center;
  margin-top: 40px;
}

.testimonials {
  background: var(--bg-white);
}

.testimonial-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.testimonial-quote {
  font-size: 18px;
  font-style: italic;
  color: var(--text-primary);
  margin-bottom: 24px;
  line-height: 1.8;
}

.testimonial-author {
  color: var(--text-secondary);
  font-size: 14px;
}

.footer {
  background: #1A1A2E;
  color: #BFBFBF;
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 40px;
}

.footer h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}

.footer p {
  font-size: 14px;
  line-height: 1.8;
}

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

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

.footer-links a {
  color: #BFBFBF;
  font-size: 14px;
  text-decoration: none;
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
}

.page-header {
  margin-top: 72px;
  background: linear-gradient(135deg, #E6F7FF 0%, #F0F5FF 100%);
  padding: 60px 0;
  text-align: center;
}

.page-header h1 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

.filter-bar {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
  justify-content: center;
}

.filter-btn {
  padding: 8px 20px;
  border: 1px solid var(--border);
  border-radius: 20px;
  background: var(--bg-white);
  color: var(--text-secondary);
  font-size: 14px;
  cursor: pointer;
  transition: all 0.2s ease;
}

.filter-btn:hover,
.filter-btn.active {
  border-color: var(--primary);
  color: var(--primary);
  background: rgba(24, 144, 255, 0.05);
}

.about-intro {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-text h2 {
  font-size: 24px;
  margin-bottom: 16px;
}

.about-text p {
  color: var(--text-secondary);
  margin-bottom: 16px;
  font-size: 15px;
}

.about-image {
  width: 100%;
  height: 360px;
  background: var(--border-light);
  border-radius: var(--card-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--text-secondary);
}

.timeline {
  position: relative;
  max-width: 800px;
  margin: 0 auto;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 50%;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--border);
  transform: translateX(-50%);
}

.timeline-item {
  display: flex;
  margin-bottom: 40px;
  position: relative;
}

.timeline-item:nth-child(odd) {
  flex-direction: row-reverse;
}

.timeline-dot {
  position: absolute;
  left: 50%;
  top: 20px;
  width: 16px;
  height: 16px;
  background: var(--primary);
  border-radius: 50%;
  transform: translateX(-50%);
  border: 3px solid var(--bg-white);
  z-index: 1;
}

.timeline-content {
  width: 45%;
  padding: 24px;
}

.timeline-content .year {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 8px;
}

.timeline-content h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.gallery-item {
  height: 240px;
  background: var(--border-light);
  border-radius: var(--card-radius);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--text-secondary);
  border: 1px solid var(--border);
}

.gallery-item svg {
  width: 48px;
  height: 48px;
  fill: var(--border);
}

.case-card {
  padding: 0;
  overflow: hidden;
}

.case-card .case-image {
  width: 100%;
  height: 200px;
  background: var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--text-secondary);
}

.case-card .case-image svg {
  width: 48px;
  height: 48px;
  fill: var(--border);
}

.case-card .case-body {
  padding: 24px;
}

.case-card .case-tag {
  display: inline-block;
  background: rgba(24, 144, 255, 0.1);
  color: var(--primary);
  padding: 4px 12px;
  border-radius: 4px;
  font-size: 12px;
  font-weight: 500;
  margin-bottom: 12px;
}

.case-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
}

.case-card .case-detail {
  margin-bottom: 8px;
  font-size: 14px;
  color: var(--text-secondary);
}

.case-card .case-detail strong {
  color: var(--text-primary);
}

.case-card .case-result {
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  font-size: 14px;
}

.case-card .case-result .result-value {
  color: var(--secondary);
  font-weight: 600;
  font-size: 20px;
}

.news-list {
  max-width: 800px;
  margin: 0 auto;
}

.news-item {
  display: flex;
  gap: 24px;
  padding: 24px 0;
  border-bottom: 1px solid var(--border-light);
}

.news-item .news-date {
  flex-shrink: 0;
  width: 80px;
  text-align: center;
}

.news-item .news-date .day {
  font-size: 28px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1;
}

.news-item .news-date .month {
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 4px;
}

.news-item .news-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

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

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

.news-item .news-body p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 8px;
}

.news-item .news-tag {
  display: inline-block;
  background: rgba(24, 144, 255, 0.1);
  color: var(--primary);
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 12px;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
}

.contact-info h2 {
  font-size: 24px;
  margin-bottom: 24px;
}

.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  align-items: flex-start;
}

.contact-item .icon {
  width: 40px;
  height: 40px;
  background: rgba(24, 144, 255, 0.1);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-item .icon svg {
  width: 20px;
  height: 20px;
  fill: var(--primary);
}

.contact-item .info h4 {
  font-size: 14px;
  color: var(--text-secondary);
  font-weight: 400;
  margin-bottom: 4px;
}

.contact-item .info p {
  font-size: 15px;
  font-weight: 500;
}

.contact-item .info a {
  color: var(--text-primary);
  font-weight: 500;
}

.contact-map {
  width: 100%;
  height: 360px;
  background: var(--border-light);
  border-radius: var(--card-radius);
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--text-secondary);
}

.contact-map svg {
  width: 48px;
  height: 48px;
  fill: var(--border);
}

.contact-form {
  max-width: 600px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-group label .required {
  color: #F5222D;
  margin-left: 4px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border);
  border-radius: var(--input-radius);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.2s ease;
  background: var(--bg-white);
}

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

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

.form-submit {
  text-align: center;
}

.products-page-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.product-detail-card {
  padding: 0;
  overflow: hidden;
}

.product-detail-card .product-image {
  width: 100%;
  height: 240px;
  background: var(--border-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 8px;
  color: var(--text-secondary);
}

.product-detail-card .product-image svg {
  width: 48px;
  height: 48px;
  fill: var(--border);
}

.product-detail-card .product-body {
  padding: 24px;
}

.product-detail-card h3 {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
}

.product-detail-card p {
  color: var(--text-secondary);
  font-size: 14px;
  margin-bottom: 16px;
  line-height: 1.7;
}

.product-detail-card .product-features {
  list-style: none;
  padding: 0;
}

.product-detail-card .product-features li {
  font-size: 14px;
  color: var(--text-secondary);
  padding: 4px 0;
  padding-left: 20px;
  position: relative;
}

.product-detail-card .product-features li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 11px;
  width: 8px;
  height: 8px;
  background: var(--primary);
  border-radius: 50%;
}

@media (max-width: 1199px) {
  .advantages-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }

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

  .about-intro {
    grid-template-columns: 1fr;
  }

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

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

@media (max-width: 767px) {
  body {
    font-size: 15px;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 24px;
  }

  .hero {
    padding: 60px 0 48px;
  }

  .hero h1 {
    font-size: 28px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
  }

  .hero .subtitle {
    font-size: 16px;
  }

  .nav-links {
    display: none;
    position: absolute;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--bg-white);
    flex-direction: column;
    padding: 16px 24px;
    gap: 0;
    border-bottom: 1px solid var(--border-light);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links li {
    width: 100%;
  }

  .nav-links a {
    display: block;
    padding: 12px 0;
    border-bottom: 1px solid var(--border-light);
  }

  .hamburger {
    display: flex;
  }

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

  .products-grid,
  .products-page-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .cert-image {
    width: 100%;
  }

  .timeline::before {
    left: 20px;
  }

  .timeline-item,
  .timeline-item:nth-child(odd) {
    flex-direction: row;
    padding-left: 48px;
  }

  .timeline-dot {
    left: 20px;
  }

  .timeline-content {
    width: 100%;
  }

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

  .news-item {
    flex-direction: column;
    gap: 12px;
  }

  .news-item .news-date {
    display: flex;
    gap: 8px;
    align-items: baseline;
    width: auto;
    text-align: left;
  }
}