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

:root {
  --primary-color: #f7b500;
  --secondary-color: #ff9500;
  --dark-color: #1a1a1a;
  --gray-color: #666;
  --light-gray: #f5f5f5;
  --white: #ffffff;
  --shadow: 0 2px 20px rgba(0,0,0,0.1);
  --shadow-hover: 0 8px 30px rgba(0,0,0,0.15);
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  line-height: 1.6;
  color: var(--dark-color);
  background: var(--white);
}

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

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--white);
  box-shadow: var(--shadow);
  z-index: 1000;
  transition: all 0.3s ease;
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 80px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  transition: transform 0.3s ease;
}

.logo:hover {
  transform: translateY(-2px);
}

.logo-icon {
  font-size: 40px;
  filter: drop-shadow(2px 2px 4px rgba(0,0,0,0.1));
}

.logo-text h1 {
  font-size: 24px;
  color: var(--dark-color);
  font-weight: 700;
  line-height: 1.2;
}

.logo-domain {
  font-size: 12px;
  color: var(--primary-color);
  font-weight: 600;
}

.nav {
  display: flex;
  gap: 40px;
}

.nav-link {
  color: var(--dark-color);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  padding: 8px 0;
  position: relative;
  transition: color 0.3s ease;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 3px;
  background: var(--primary-color);
  transition: width 0.3s ease;
}

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

.nav-link.active::after,
.nav-link:hover::after {
  width: 100%;
}

.btn-contact {
  background: var(--primary-color);
  color: var(--white);
  border: none;
  padding: 12px 30px;
  border-radius: 25px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(247, 181, 0, 0.3);
}

.btn-contact:hover {
  background: var(--secondary-color);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(247, 181, 0, 0.4);
}

.hero {
  margin-top: 80px;
  position: relative;
  overflow: hidden;
}

.hero-slider {
  position: relative;
  height: 600px;
}

.hero-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
}

.hero-slide.active {
  opacity: 1;
}

.hero-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.3) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  padding-top: 180px;
  color: var(--white);
}

.hero-title {
  font-size: 56px;
  font-weight: 700;
  margin-bottom: 20px;
  text-shadow: 2px 2px 8px rgba(0,0,0,0.3);
}

.hero-subtitle {
  font-size: 24px;
  margin-bottom: 40px;
  opacity: 0.95;
  text-shadow: 1px 1px 4px rgba(0,0,0,0.3);
}

.hero-buttons {
  display: flex;
  gap: 20px;
}

.btn-primary, .btn-secondary {
  padding: 16px 40px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 30px;
  border: none;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-primary {
  background: var(--primary-color);
  color: var(--white);
  box-shadow: 0 4px 20px rgba(247, 181, 0, 0.4);
}

.btn-primary:hover {
  background: var(--secondary-color);
  transform: translateY(-3px);
  box-shadow: 0 6px 25px rgba(247, 181, 0, 0.5);
}

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

.btn-secondary:hover {
  background: var(--white);
  color: var(--primary-color);
  transform: translateY(-3px);
}

.hero-controls {
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  transform: translateY(-50%);
  display: flex;
  justify-content: space-between;
  padding: 0 40px;
  z-index: 3;
  pointer-events: none;
}

.hero-prev, .hero-next {
  width: 50px;
  height: 50px;
  background: rgba(255,255,255,0.2);
  border: 2px solid var(--white);
  color: var(--white);
  font-size: 28px;
  border-radius: 50%;
  cursor: pointer;
  transition: all 0.3s ease;
  backdrop-filter: blur(5px);
  pointer-events: all;
}

.hero-prev:hover, .hero-next:hover {
  background: var(--primary-color);
  border-color: var(--primary-color);
  transform: scale(1.1);
}

.hero-dots {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 3;
}

.dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background: rgba(255,255,255,0.5);
  cursor: pointer;
  transition: all 0.3s ease;
}

.dot.active, .dot:hover {
  background: var(--primary-color);
  transform: scale(1.2);
}

.stats {
  background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
  padding: 60px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}

.stat-item {
  color: var(--white);
}

.stat-number {
  font-size: 48px;
  font-weight: 700;
  margin-bottom: 10px;
}

.stat-label {
  font-size: 16px;
  opacity: 0.95;
}

section {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.section-subtitle {
  font-size: 18px;
  color: var(--gray-color);
}

.services {
  background: var(--light-gray);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.service-card {
  background: var(--white);
  padding: 40px 30px;
  border-radius: 15px;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.service-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.service-icon {
  width: 80px;
  height: 80px;
  margin-bottom: 25px;
  border-radius: 12px;
  overflow: hidden;
}

.service-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.service-title {
  font-size: 22px;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.service-desc {
  font-size: 15px;
  color: var(--gray-color);
  line-height: 1.8;
  margin-bottom: 20px;
}

.service-features {
  list-style: none;
  margin-bottom: 25px;
}

.service-features li {
  font-size: 14px;
  color: var(--gray-color);
  padding: 8px 0;
  padding-left: 25px;
  position: relative;
}

.service-features li::before {
  content: '✓';
  position: absolute;
  left: 0;
  color: var(--primary-color);
  font-weight: 700;
}

.service-btn {
  background: transparent;
  color: var(--primary-color);
  border: 2px solid var(--primary-color);
  padding: 10px 25px;
  border-radius: 25px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

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

.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 30px;
}

.solution-card {
  background: var(--white);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  display: flex;
  gap: 25px;
}

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

.solution-img {
  width: 200px;
  height: 200px;
  object-fit: cover;
  flex-shrink: 0;
}

.solution-content {
  padding: 30px 30px 30px 0;
}

.solution-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 12px;
  color: var(--dark-color);
}

.solution-desc {
  font-size: 14px;
  color: var(--gray-color);
  line-height: 1.8;
  margin-bottom: 20px;
}

.solution-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  padding: 6px 15px;
  background: rgba(247, 181, 0, 0.1);
  color: var(--primary-color);
  font-size: 13px;
  border-radius: 15px;
  font-weight: 500;
}

.advantages {
  background: var(--light-gray);
}

.advantages-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}

.advantage-card {
  background: var(--white);
  padding: 40px 30px;
  border-radius: 15px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
}

.advantage-card:hover {
  transform: translateY(-10px);
  box-shadow: var(--shadow-hover);
}

.advantage-icon {
  width: 100px;
  height: 100px;
  margin: 0 auto 25px;
  border-radius: 50%;
  overflow: hidden;
}

.advantage-icon img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.advantage-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 15px;
  color: var(--dark-color);
}

.advantage-desc {
  font-size: 14px;
  color: var(--gray-color);
  line-height: 1.8;
}

.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 25px;
}

.case-card {
  position: relative;
  height: 300px;
  border-radius: 15px;
  overflow: hidden;
  cursor: pointer;
}

.case-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.case-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.3) 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 30px;
  color: var(--white);
  opacity: 0;
  transition: opacity 0.3s ease;
}

.case-card:hover .case-overlay {
  opacity: 1;
}

.case-card:hover .case-img {
  transform: scale(1.1);
}

.case-title {
  font-size: 20px;
  font-weight: 600;
  margin-bottom: 10px;
}

.case-desc {
  font-size: 14px;
  opacity: 0.95;
}

.about {
  background: var(--light-gray);
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.about-img {
  width: 100%;
  border-radius: 15px;
  box-shadow: var(--shadow);
}

.about-text {
  font-size: 15px;
  color: var(--gray-color);
  line-height: 1.8;
  margin-bottom: 20px;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 15px;
  margin: 30px 0;
}

.about-feature {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--dark-color);
}

.feature-icon {
  width: 24px;
  height: 24px;
  background: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  flex-shrink: 0;
}

.contact {
  background: linear-gradient(135deg, var(--dark-color) 0%, #2a2a2a 100%);
  color: var(--white);
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
}

.contact-title {
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 15px;
}

.contact-subtitle {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 40px;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 30px;
}

.contact-item {
  display: flex;
  gap: 20px;
}

.contact-icon {
  font-size: 32px;
  flex-shrink: 0;
}

.contact-label {
  font-size: 13px;
  opacity: 0.7;
  margin-bottom: 5px;
}

.contact-value {
  font-size: 18px;
  font-weight: 600;
}

.contact-form {
  background: var(--white);
  padding: 40px;
  border-radius: 15px;
  box-shadow: var(--shadow);
}

.form-input, .form-textarea {
  width: 100%;
  padding: 15px;
  border: 2px solid #e0e0e0;
  border-radius: 8px;
  font-size: 15px;
  margin-bottom: 20px;
  transition: border-color 0.3s ease;
  font-family: inherit;
}

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

.form-textarea {
  resize: vertical;
}

.btn-block {
  width: 100%;
}

.footer {
  background: #1a1a1a;
  color: var(--white);
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.footer-logo h3 {
  font-size: 20px;
  line-height: 1.2;
}

.footer-desc {
  font-size: 14px;
  opacity: 0.8;
  line-height: 1.6;
  margin-bottom: 30px;
}

.footer-qr {
  text-align: center;
  margin-top: 30px;
}

.qr-img {
  width: 120px;
  height: 120px;
  border-radius: 8px;
  margin-bottom: 10px;
  background: var(--white);
  padding: 5px;
}

.qr-text {
  font-size: 12px;
  opacity: 0.7;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 20px;
}

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

.footer-links li, .footer-contact li {
  margin-bottom: 12px;
}

.footer-links a {
  color: rgba(255,255,255,0.7);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.3s ease;
}

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

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 30px;
  text-align: center;
}

.copyright {
  font-size: 14px;
  opacity: 0.7;
  margin-bottom: 10px;
}

.footer-keywords {
  font-size: 12px;
  opacity: 0.5;
  line-height: 1.8;
}

.back-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 50px;
  height: 50px;
  background: var(--primary-color);
  color: var(--white);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  cursor: pointer;
  box-shadow: 0 4px 20px rgba(247, 181, 0, 0.4);
  transition: all 0.3s ease;
  opacity: 0;
  visibility: hidden;
}

.back-top.visible {
  opacity: 1;
  visibility: visible;
}

.back-top:hover {
  background: var(--secondary-color);
  transform: translateY(-5px);
  box-shadow: 0 6px 25px rgba(247, 181, 0, 0.5);
}

@media (max-width: 1024px) {
  .services-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

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

@media (max-width: 768px) {
  .nav {
    display: none;
  }

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

  .hero-subtitle {
    font-size: 18px;
  }

  .section-title {
    font-size: 32px;
  }

  .services-grid,
  .solutions-grid,
  .advantages-grid,
  .cases-grid,
  .stats-grid {
    grid-template-columns: 1fr;
  }

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

  .solution-card {
    flex-direction: column;
  }

  .solution-img {
    width: 100%;
    height: 200px;
  }

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