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

body {
  font-family: Georgia, serif;
  line-height: 1.6;
  color: #2c3e50;
  background: #f8f9fa;
}

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

/* Header */
.header {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  color: white;
  padding: 1rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
}

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

.logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.logo i {
  font-size: 2.5rem;
  color: #fbbf24;
}

.logo h1 {
  font-size: 1.8rem;
  color: white;
  margin: 0;
}

.nav ul {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav-link {
  color: white;
  text-decoration: none;
  padding: 0.5rem 1rem;
  border-radius: 5px;
  transition: all 0.3s ease;
}

.nav-link:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: #fbbf24;
}

/* Hero Section */
.hero {
  background: linear-gradient(rgba(30, 58, 138, 0.6), rgba(37, 99, 235, 0.6)),
    url("background.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  background-attachment: fixed;
  min-height: 100vh;
  display: flex;
  align-items: center;
  text-align: center;
  color: white;
  margin-top: 80px;
  position: relative;
}

/* 背景图片优化 */
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("background.png");
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  z-index: -1;
  filter: brightness(1.1) contrast(1.1);
}

.hero-content h2 {
  font-size: 3.5rem;
  color: white;
  margin-bottom: 1.5rem;
  text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
  text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
}

.hero-buttons {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 1rem 2rem;
  text-decoration: none;
  border-radius: 50px;
  font-weight: 600;
  transition: all 0.3s ease;
  border: none;
  cursor: pointer;
  font-size: 1.1rem;
}

.btn-primary {
  background: linear-gradient(135deg, #fbbf24 0%, #f59e0b 100%);
  color: #1e3a8a;
}

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

.btn-secondary:hover {
  background: white;
  color: #1e3a8a;
}

/* Sections */
section {
  padding: 5rem 0;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-header h2 {
  font-size: 2.2rem;
  color: #1e3a8a;
  margin-bottom: 1.5rem;
}

.section-header p {
  font-size: 1.2rem;
  color: #64748b;
  max-width: 600px;
  margin: 0 auto;
}

/* About Section */
.about {
  background: white;
}

.about-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.about-text h3 {
  font-size: 1.5rem;
  color: #2563eb;
  margin-bottom: 1rem;
}

.about-text ul {
  list-style: none;
  margin-top: 1rem;
}

.about-text li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.about-text i {
  color: #10b981;
  font-size: 1.2rem;
}

.about-image .image-placeholder {
  background: linear-gradient(135deg, #e0f2fe 0%, #b3e5fc 100%);
  border: 3px dashed #0288d1;
  border-radius: 15px;
  padding: 3rem;
  text-align: center;
  color: #0288d1;
}

.about-image .image-placeholder i {
  font-size: 4rem;
  margin-bottom: 1rem;
}

.about-image .image-placeholder p {
  font-size: 1.2rem;
  font-weight: 600;
}

/* Services Section */
.services {
  background: #f8f9fa;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
}

.service-card {
  background: white;
  padding: 2rem;
  border-radius: 15px;
  text-align: center;
  box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}

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

.service-icon {
  width: 80px;
  height: 80px;
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.5rem;
}

.service-icon i {
  font-size: 2rem;
  color: white;
}

.service-card h3 {
  color: #1e3a8a;
  margin-bottom: 1rem;
}

/* Support Section */
.support {
  background: white;
}

.support-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
}

.support-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.support-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #10b981 0%, #059669 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.support-icon i {
  font-size: 1.5rem;
  color: white;
}

.support-text h3 {
  color: #10b981;
  margin-bottom: 0.5rem;
}

/* Subscribe Section */
.subscribe {
  background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 100%);
  color: white;
}

.subscribe h2,
.subscribe h3 {
  color: white;
}

.subscribe-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.subscribe-text ul {
  list-style: none;
  margin-top: 1rem;
}

.subscribe-text li {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  font-size: 1.1rem;
}

.subscribe-text i {
  color: #fbbf24;
  font-size: 1.2rem;
}

/* Contact Section */
.contact {
  background: #f8f9fa;
}

.contact-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 2rem;
}

.contact-item {
  display: flex;
  gap: 1.5rem;
  align-items: flex-start;
}

.contact-icon {
  width: 60px;
  height: 60px;
  background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon i {
  font-size: 1.5rem;
  color: white;
}

.contact-text h3 {
  color: #ef4444;
  margin-bottom: 0.5rem;
}

/* Forms */
.form-group {
  margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem;
  border: 2px solid #e2e8f0;
  border-radius: 8px;
  font-size: 1rem;
  font-family: inherit;
}

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

/* Footer */
.footer {
  background: #1e293b;
  color: white;
  padding: 3rem 0 1rem;
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo i {
  font-size: 2rem;
  color: #fbbf24;
}

.footer-logo h3 {
  color: white;
  font-size: 1.3rem;
  margin: 0;
}

.footer-links h4,
.footer-contact h4 {
  color: #fbbf24;
  margin-bottom: 1rem;
}

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

.footer-links li {
  margin-bottom: 0.5rem;
}

.footer-links a {
  color: #cbd5e1;
  text-decoration: none;
}

.footer-links a:hover {
  color: #fbbf24;
}

.footer-contact p {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.5rem;
  color: #cbd5e1;
}

.footer-contact i {
  color: #fbbf24;
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid #334155;
  color: #94a3b8;
}

/* Responsive */
@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    gap: 1rem;
  }

  .nav ul {
    flex-wrap: wrap;
    justify-content: center;
    gap: 1rem;
  }

  .hero-content h2 {
    font-size: 2.5rem;
  }

  .hero-buttons {
    flex-direction: column;
    align-items: center;
  }

  .about-content,
  .subscribe-content,
  .contact-content {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

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

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

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

  .hero {
    margin-top: 120px;
  }
}