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

body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  line-height: 1.6;
  color: #333;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  overflow-x: hidden;
}

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

.navbar {
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  animation: slideDown 0.5s ease;
}

.navbar .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 15px 20px;
}

.logo-text {
  font-size: 24px;
  font-weight: bold;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-links {
  display: flex;
  list-style: none;
  gap: 30px;
}

.nav-links a {
  text-decoration: none;
  color: #333;
  font-weight: 500;
  transition: all 0.3s ease;
  position: relative;
}

.nav-links a::after {
  content: "";
  position: absolute;
  bottom: -5px;
  left: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  transition: width 0.3s ease;
}

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

.download-btn {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  border: none;
  padding: 10px 25px;
  border-radius: 25px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
}

.download-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

.hero {
  padding: 150px 0 100px;
  /* background: linear-gradient(135deg, #667eea 0%, #667eea 100%); */
  background-color: #e6e9f3;
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: "";
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(
    circle,
    rgba(255, 255, 255, 0.1) 1px,
    transparent 1px
  );
  background-size: 50px 50px;
  animation: rotate 20s linear infinite;
}

.hero .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: relative;
  z-index: 1;
}

.hero-content {
  flex: 1;
  max-width: 600px;
  animation: fadeInLeft 1s ease;
}

.hero-title {
  font-size: 48px;
  font-weight: 800;
  color: black;
  margin-bottom: 20px;
  line-height: 1.2;
}

.hero-subtitle {
  font-size: 18px;
  color: rgba(0, 0, 0, 0.9);
  margin-bottom: 30px;
  line-height: 1.8;
}

.hero-buttons {
  display: flex;
  gap: 15px;
}

.btn-primary {
  background: white;
  color: #667eea;
  border: none;
  padding: 15px 35px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.3);
}

.btn-secondary {
  background: transparent;
  color: white;
  border: 2px solid white;
  padding: 13px 33px;
  border-radius: 30px;
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}

.btn-secondary:hover {
  background: white;
  color: #667eea;
}

.hero-image {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  position: relative;
  height: 400px;
}

.floating-card {
  position: absolute;
  background: white;
  padding: 20px 30px;
  border-radius: 15px;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 10px;
  animation: float 3s ease-in-out infinite;
}

.card-1 {
  top: 50px;
  left: 50px;
  animation-delay: 0s;
}

.card-2 {
  top: 100px;
  right: 50px;
  animation-delay: 0.5s;
}

.card-3 {
  bottom: 100px;
  left: 100px;
  animation-delay: 1s;
}

.card-4 {
  bottom: 50px;
  right: 100px;
  animation-delay: 1.5s;
}

.card-icon {
  font-size: 30px;
}

.floating-card span {
  font-weight: 600;
  color: #333;
}

section {
  padding: 80px 0;
  background: white;
}

.section-title {
  text-align: center;
  font-size: 36px;
  font-weight: 700;
  margin-bottom: 50px;
  color: #333;
  position: relative;
}

.section-title::after {
  content: "";
  display: block;
  width: 60px;
  height: 4px;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  margin: 15px auto 0;
  border-radius: 2px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.feature-card {
  background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
  padding: 40px 30px;
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s ease;
  opacity: 0;
  transform: translateY(30px);
}

.feature-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
}

.feature-icon {
  font-size: 50px;
  margin-bottom: 20px;
}

.feature-card h3 {
  font-size: 22px;
  margin-bottom: 15px;
  color: #333;
}

.feature-card p {
  color: #666;
  margin-bottom: 20px;
  line-height: 1.8;
}

.feature-list {
  list-style: none;
  text-align: left;
}

.feature-list li {
  padding: 8px 0;
  color: #555;
  position: relative;
  padding-left: 25px;
}

.feature-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  color: #667eea;
  font-weight: bold;
}

.ai-features {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
}

.ai-features .section-title {
  color: white;
}

.ai-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.ai-item {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  padding: 40px 30px;
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s ease;
  border: 1px solid rgba(255, 255, 255, 0.2);
}

.ai-item:hover {
  transform: scale(1.05);
  background: rgba(255, 255, 255, 0.2);
}

.ai-number {
  font-size: 48px;
  font-weight: 800;
  margin-bottom: 20px;
  background: linear-gradient(135deg, #fff 0%, rgba(255, 255, 255, 0.7) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.ai-item h3 {
  font-size: 20px;
  margin-bottom: 15px;
}

.ai-item p {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.8;
}

.advantage-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
}

.advantage-item {
  text-align: center;
  padding: 40px 20px;
  transition: all 0.3s ease;
}

.advantage-icon {
  font-size: 60px;
  margin-bottom: 20px;
}

.advantage-item h3 {
  font-size: 22px;
  margin-bottom: 15px;
  color: #333;
}

.advantage-item p {
  color: #666;
  line-height: 1.8;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 30px;
}

.scenario-card {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  padding: 40px 30px;
  border-radius: 20px;
  text-align: center;
  transition: all 0.3s ease;
  box-shadow: 0 10px 30px rgba(102, 126, 234, 0.3);
}

.scenario-card:hover {
  transform: translateY(-10px);
  box-shadow: 0 15px 40px rgba(102, 126, 234, 0.5);
}

.scenario-icon {
  font-size: 50px;
  margin-bottom: 20px;
}

.scenario-card h3 {
  font-size: 22px;
  margin-bottom: 15px;
}

.scenario-card p {
  color: rgba(255, 255, 255, 0.9);
  line-height: 1.8;
}

.cta {
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
  color: white;
  text-align: center;
}

.cta-title {
  font-size: 42px;
  font-weight: 700;
  margin-bottom: 20px;
}

.cta-subtitle {
  font-size: 18px;
  color: rgba(255, 255, 255, 0.9);
  margin-bottom: 40px;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
  line-height: 1.8;
}

.btn-large {
  background: white;
  color: #667eea;
  border: none;
  padding: 20px 50px;
  border-radius: 30px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

.btn-large:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.3);
}

footer {
  background: #1a1a2e;
  color: white;
  padding: 60px 0 20px;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 40px;
  margin-bottom: 40px;
}

.footer-section h4 {
  font-size: 18px;
  margin-bottom: 20px;
  color: #667eea;
}

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

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

.footer-section a {
  color: rgba(255, 255, 255, 0.7);
  text-decoration: none;
  transition: all 0.3s ease;
}

.footer-section a:hover {
  color: #667eea;
}

.footer-bottom {
  text-align: center;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  color: rgba(255, 255, 255, 0.5);
}

@keyframes slideDown {
  from {
    transform: translateY(-100%);
  }
  to {
    transform: translateY(0);
  }
}

@keyframes fadeInLeft {
  from {
    opacity: 0;
    transform: translateX(-50px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes float {
  0%,
  100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-20px);
  }
}

@keyframes rotate {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 768px) {
  .hero .container {
    flex-direction: column;
    text-align: center;
  }

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

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

  .hero-buttons {
    justify-content: center;
  }

  .hero-image {
    margin-top: 50px;
    height: 300px;
  }

  .floating-card {
    padding: 15px 20px;
    font-size: 14px;
  }

  .nav-links {
    display: none;
  }

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

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