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

:root {
  --primary: #1a73e8;
  --primary-dark: #1557b0;
  --primary-light: #4285f4;
  --secondary: #34a853;
  --accent: #ea4335;
  --dark: #1f1f1f;
  --dark-lighter: #2a2a2a;
  --dark-card: #252525;
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-300: #e0e0e0;
  --gray-400: #bdbdbd;
  --gray-500: #9e9e9e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;
  --text-primary: #202124;
  --text-secondary: #5f6368;
  --text-muted: #80868b;
  --border: #dadce0;
  --shadow-sm: 0 1px 2px 0 rgba(60, 64, 67, 0.3), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --shadow: 0 1px 3px 0 rgba(60, 64, 67, 0.3), 0 4px 8px 3px rgba(60, 64, 67, 0.15);
  --shadow-lg: 0 2px 6px 2px rgba(60, 64, 67, 0.15), 0 8px 24px 4px rgba(60, 64, 67, 0.15);
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', Roboto, sans-serif;
  background: #ffffff;
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: rgba(255, 255, 255, 0.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  transition: all 0.3s var(--ease);
}

.header.scrolled {
  box-shadow: var(--shadow);
}

.header-content {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.logo svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.logo-text {
  display: flex;
  flex-direction: column;
}

.logo-name {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 2px;
}

.logo-slogan {
  font-size: 11px;
  color: var(--text-secondary);
  letter-spacing: 0.3px;
}

.nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.2s var(--ease);
}

.nav-link:hover {
  color: var(--primary);
  background: var(--gray-100);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(26, 115, 232, 0.08);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.btn-contact {
  padding: 10px 24px;
  border-radius: 24px;
  background: var(--primary);
  border: none;
  color: white;
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}

.btn-contact:hover {
  background: var(--primary-dark);
  box-shadow: var(--shadow);
  transform: translateY(-1px);
}

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

.menu-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s var(--ease);
}

main {
  margin-top: 72px;
}

.hero {
  position: relative;
  height: 640px;
  overflow: hidden;
  background: var(--gray-900);
}

.hero-slider {
  position: relative;
  height: 100%;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  transition: opacity 0.8s var(--ease);
}

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

.hero-bg {
  position: absolute;
  inset: 0;
}

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

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to right, rgba(0, 0, 0, 0.7), rgba(0, 0, 0, 0.3));
}

.hero-content {
  position: relative;
  z-index: 1;
  height: 640px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  max-width: 640px;
}

.hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 600;
  color: white;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  width: fit-content;
  margin-bottom: 20px;
}

.hero-title {
  font-size: 52px;
  font-weight: 700;
  line-height: 1.2;
  color: white;
  margin-bottom: 20px;
}

.hero-desc {
  font-size: 18px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 32px;
}

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

.btn-hero-primary,
.btn-hero-secondary {
  padding: 14px 32px;
  border-radius: 24px;
  font-size: 15px;
  font-weight: 500;
  border: none;
  cursor: pointer;
  transition: all 0.3s var(--ease);
}

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

.btn-hero-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 255, 255, 0.3);
}

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

.btn-hero-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
}

.hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(255, 255, 255, 0.25);
  color: white;
  cursor: pointer;
  z-index: 10;
  transition: all 0.3s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero-arrow:hover {
  background: rgba(255, 255, 255, 0.25);
  transform: translateY(-50%) scale(1.05);
}

.hero-arrow svg {
  width: 24px;
  height: 24px;
}

.hero-prev {
  left: 32px;
}

.hero-next {
  right: 32px;
}

.hero-indicators {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 12px;
  z-index: 10;
}

.indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  cursor: pointer;
  transition: all 0.3s var(--ease);
}

.indicator.active {
  width: 32px;
  border-radius: 4px;
  background: white;
}

.stats-section {
  padding: 80px 0;
  background: var(--gray-50);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-card {
  text-align: center;
  padding: 32px 24px;
  background: white;
  border-radius: 16px;
  border: 1px solid var(--border);
  transition: all 0.3s var(--ease);
}

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

.stat-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  background: rgba(26, 115, 232, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.stat-icon svg {
  width: 28px;
  height: 28px;
  color: var(--primary);
}

.stat-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 8px;
}

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

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 700;
  color: var(--primary);
  text-transform: uppercase;
  letter-spacing: 1.5px;
  margin-bottom: 12px;
}

.section-title {
  font-size: 40px;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.6;
  max-width: 640px;
  margin: 0 auto;
}

.services-section {
  padding: 100px 0;
}

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

.service-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 16px;
  overflow: hidden;
  transition: all 0.3s var(--ease);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: var(--primary);
}

.service-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.service-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.service-card:hover .service-image img {
  transform: scale(1.05);
}

.service-content {
  padding: 28px;
}

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

.service-desc {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin-bottom: 20px;
}

.service-features {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  list-style: none;
}

.service-features li {
  padding: 6px 14px;
  background: var(--gray-100);
  border-radius: 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
}

.features-section {
  padding: 100px 0;
  background: var(--gray-50);
}

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

.feature-item {
  text-align: center;
  padding: 40px 32px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 16px;
  transition: all 0.3s var(--ease);
}

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

.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: rgba(26, 115, 232, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
}

.feature-icon svg {
  width: 32px;
  height: 32px;
  color: var(--primary);
}

.feature-title {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

.content-section {
  padding: 100px 0;
}

.content-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.content-card {
  background: white;
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: all 0.3s var(--ease);
}

.content-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: var(--primary);
}

.content-image {
  position: relative;
  aspect-ratio: 16 / 10;
  overflow: hidden;
}

.content-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s var(--ease);
}

.content-card:hover .content-image img {
  transform: scale(1.08);
}

.content-overlay {
  position: absolute;
  top: 12px;
  left: 12px;
}

.content-tag {
  padding: 6px 14px;
  background: rgba(26, 115, 232, 0.95);
  backdrop-filter: blur(8px);
  border-radius: 16px;
  font-size: 12px;
  font-weight: 600;
  color: white;
}

.content-tag.hot {
  background: rgba(234, 67, 53, 0.95);
}

.content-tag.new {
  background: rgba(52, 168, 83, 0.95);
}

.content-info {
  padding: 20px;
}

.content-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 8px;
}

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

.about-section {
  padding: 100px 0;
  background: var(--gray-50);
}

.about-wrapper {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 64px;
  align-items: center;
}

.about-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: var(--shadow);
}

.about-image img {
  width: 100%;
  height: auto;
  display: block;
}

.about-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.about-text {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-highlights {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.highlight-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: white;
  border: 1px solid var(--border);
  border-radius: 12px;
}

.highlight-icon {
  width: 40px;
  height: 40px;
  background: rgba(26, 115, 232, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.highlight-icon svg {
  width: 20px;
  height: 20px;
  color: var(--primary);
}

.highlight-item span {
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
}

.cta-section {
  padding: 100px 0;
  background: var(--primary);
  color: white;
}

.cta-section .container {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 64px;
  align-items: center;
}

.cta-content {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.cta-title {
  font-size: 40px;
  font-weight: 700;
  line-height: 1.2;
  color: white;
}

.cta-desc {
  font-size: 18px;
  line-height: 1.6;
  color: rgba(255, 255, 255, 0.9);
}

.btn-cta {
  padding: 16px 40px;
  border-radius: 24px;
  background: white;
  border: none;
  color: var(--primary);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  width: fit-content;
  transition: all 0.3s var(--ease);
}

.btn-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.cta-image {
  border-radius: 16px;
  overflow: hidden;
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

.cta-image img {
  width: 100%;
  height: auto;
  display: block;
}

.footer {
  background: var(--gray-900);
  color: rgba(255, 255, 255, 0.8);
  padding: 80px 0 32px;
}

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

.footer-brand {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.footer .logo svg {
  color: white;
}

.footer .logo-name {
  color: white;
}

.footer .logo-slogan {
  color: rgba(255, 255, 255, 0.6);
}

.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.7;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: white;
  margin-bottom: 8px;
}

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

.footer-link:hover {
  color: white;
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.copyright {
  font-size: 13px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-keywords {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  font-size: 12px;
  color: rgba(255, 255, 255, 0.5);
}

.scroll-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  border: none;
  color: white;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s var(--ease);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow);
  z-index: 100;
}

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

.scroll-top:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.scroll-top svg {
  width: 24px;
  height: 24px;
}

@media (max-width: 1024px) {
  .nav {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

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

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

  .about-wrapper {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .cta-section .container {
    grid-template-columns: 1fr;
  }

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

@media (max-width: 768px) {
  .container {
    padding: 0 20px;
  }

  .hero {
    height: 520px;
  }

  .hero-content {
    height: 520px;
  }

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

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

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

  .hero-arrow {
    display: none;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 20px;
  }

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

  .services-grid,
  .features-grid,
  .content-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .footer-top {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-keywords {
    flex-wrap: wrap;
  }
}

@media (max-width: 480px) {
  .hero {
    height: 440px;
  }

  .hero-content {
    height: 440px;
  }

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

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

  .cta-title {
    font-size: 28px;
  }
}