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

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #fafafa;
  padding-bottom: 80px; /* 为底部悬浮条留出空间 */
}

.guanf-container {
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 0;
}

/* Navigation */
.guanf-navbar {
  background: #1e1e1e;
  padding: 15px 0;
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

.guanf-nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.guanf-logo {
  display: flex;
  align-items: center;
  color: white;
  text-decoration: none;
  font-weight: 700;
  font-size: 1.5rem;
}

.guanf-logo img {
    width: 10%;
    height: 10%;
}

.guanf-logo-icon {
  color: #f0b90b;
  margin-right: 10px;
  font-size: 1.8rem;
}

.guanf-nav-links {
  display: flex;
  list-style: none;
}

.guanf-nav-links li {
  margin: 0 15px;
}

.guanf-nav-links a {
  color: #ddd;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s;
  display: flex;
  align-items: center;
}

.guanf-nav-links a:hover {
  color: #f0b90b;
}

.guanf-nav-icon {
  margin-right: 5px;
  font-size: 0.9rem;
}

.guanf-nav-register {
  background: #f0b90b;
  color: #1e1e1e !important;
  padding: 8px 20px;
  border-radius: 20px;
  font-weight: 600;
}

.guanf-nav-register:hover {
  background: #e6a300;
  color: #1e1e1e !important;
}

.guanf-mobile-menu-btn {
  display: none;
  background: none;
  border: none;
  color: white;
  font-size: 1.5rem;
  cursor: pointer;
}

/* Announcement Section */
.guanf-announcement-section {
  background: linear-gradient(45deg, #f0b90b, #e6a300);
  color: #1e1e1e;
  padding: 15px 0;
  position: relative;
}

.guanf-announcement-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.guanf-announcement-title {
  display: flex;
  align-items: center;
  font-weight: 700;
  margin-right: 20px;
  white-space: nowrap;
}

.guanf-announcement-title i {
  margin-right: 10px;
  font-size: 1.2rem;
}

.guanf-announcement-content {
  flex: 1;
  overflow: hidden;
}

.guanf-announcement-scroll {
  display: inline-block;
  white-space: nowrap;
  padding-left: 100%;
  animation: guanf-scrollText 25s linear infinite;
}

@keyframes guanf-scrollText {
  0% {
    transform: translateX(0);
  }
  100% {
    transform: translateX(-100%);
  }
}

.guanf-announcement-close {
  background: none;
  border: none;
  color: #1e1e1e;
  font-size: 1.2rem;
  cursor: pointer;
  margin-left: 20px;
}

/* Buttons */
.guanf-btn {
  display: inline-block;
  padding: 14px 32px;
  margin: 10px 5px;
  font-size: 18px;
  font-weight: 600;
  text-align: center;
  text-decoration: none;
  border-radius: 50px;
  transition: all 0.3s ease;
  cursor: pointer;
}

.guanf-btn-android {
  background: linear-gradient(45deg, #f0b90b, #e6a300);
  color: #1e1e1e;
  border: 2px solid #d9a000;
}
.guanf-btn-android:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(240, 185, 11, 0.4);
}

.guanf-btn-ios {
  background: #000;
  color: white;
  border: 2px solid #333;
}
.guanf-btn-ios:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.guanf-btn-windows {
  background: linear-gradient(45deg, #0078d7, #106ebe);
  color: white;
  border: 2px solid #005a9e;
}
.guanf-btn-windows:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0, 120, 215, 0.4);
}

.guanf-btn-macos {
  background: linear-gradient(45deg, #999, #777);
  color: white;
  border: 2px solid #666;
}
.guanf-btn-macos:hover {
  transform: translateY(-3px);
  box-shadow: 0 6px 20px rgba(0,0,0,0.3);
}

.guanf-btn-large {
  display: block;
  margin: 30px auto;
  padding: 18px 40px;
  font-size: 20px;
}

/* Floating Bottom Banner */
.guanf-floating-banner {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  background: linear-gradient(90deg, #1e1e1e, #2a2a2a);
  color: white;
  padding: 15px 0;
  z-index: 999;
  box-shadow: 0 -5px 20px rgba(0,0,0,0.2);
  transform: translateY(0);
  transition: transform 0.3s ease;
}

.guanf-floating-banner.guanf-hidden {
  transform: translateY(100%);
}

.guanf-banner-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 90%;
  max-width: 1200px;
  margin: 0 auto;
}

.guanf-banner-content {
  display: flex;
  align-items: center;
  flex: 1;
}

.guanf-banner-logo {
  display: flex;
  align-items: center;
  margin-right: 20px;
}

.guanf-banner-logo img {
    width: 30%;
    height: 30%;
}

.guanf-banner-logo i {
  font-size: 2rem;
  color: #f0b90b;
  margin-right: 10px;
}

.guanf-banner-text {
  flex: 1;
}

.guanf-banner-text h3 {
  font-size: 1.2rem;
  margin-bottom: 5px;
}

.guanf-banner-text p {
  font-size: 0.9rem;
  opacity: 0.8;
}

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

.guanf-banner-btn {
  padding: 10px 25px;
  border-radius: 30px;
  font-weight: 600;
  text-decoration: none;
  transition: all 0.3s ease;
  display: flex;
  align-items: center;
}

.guanf-banner-btn-download {
  background: #f0b90b;
  color: #1e1e1e;
}

.guanf-banner-btn-download:hover {
  background: #e6a300;
  transform: translateY(-2px);
  box-shadow: 0 5px 15px rgba(240, 185, 11, 0.3);
}

.guanf-banner-btn-login {
  background: transparent;
  color: white;
  border: 2px solid #f0b90b;
}

.guanf-banner-btn-login:hover {
  background: rgba(240, 185, 11, 0.1);
  transform: translateY(-2px);
}

.guanf-banner-close {
  background: none;
  border: none;
  color: #aaa;
  font-size: 1.2rem;
  cursor: pointer;
  margin-left: 20px;
  transition: color 0.3s;
}

.guanf-banner-close:hover {
  color: white;
}

/* Icon styles */
.guanf-icon {
  margin-right: 8px;
  width: 20px;
  text-align: center;
}

.guanf-trust-icon {
  font-size: 2.5rem;
  margin-bottom: 15px;
  color: #f0b90b;
}

/* Hero Section */
.guanf-hero {
  background: linear-gradient(135deg, #1e1e1e, #333);
  color: white;
  padding: 100px 0 80px;
  text-align: center;
}

.guanf-badge {
  display: inline-flex;
  align-items: center;
  background: rgba(255,255,255,0.15);
  padding: 8px 16px;
  border-radius: 30px;
  margin-bottom: 20px;
  backdrop-filter: blur(5px);
}

.guanf-badge i {
  margin-right: 8px;
  color: #f0b90b;
}

.guanf-hero h1 {
  font-size: 2.8rem;
  margin: 20px 0;
  font-weight: 700;
}

.guanf-subtitle {
  font-size: 1.3rem;
  max-width: 700px;
  margin: 0 auto 40px;
  opacity: 0.9;
}

.guanf-app-preview img {
  max-width: 40%;
  height: auto;
  border-radius: 16px;
  box-shadow: 0 10px 40px rgba(0,0,0,0.3);
  margin-top: 40px;
}

/* Multi-Download Section */
.guanf-multi-download-section {
  padding: 80px 0;
  background: #f8f9fa;
}

.guanf-multi-download-section h2 {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 50px;
  color: #1e1e1e;
}

.guanf-platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 30px;
  margin-bottom: 40px;
}

.guanf-platform-card {
  background: white;
  border-radius: 16px;
  padding: 30px 20px;
  text-align: center;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.guanf-platform-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}

.guanf-platform-icon {
  font-size: 3rem;
  margin-bottom: 20px;
}

.guanf-android-icon {
  color: #3DDC84;
}

.guanf-ios-icon {
  color: #000;
}

.guanf-windows-icon {
  color: #0078D7;
}

.guanf-macos-icon {
  color: #999;
}

.guanf-platform-card h3 {
  font-size: 1.5rem;
  margin-bottom: 15px;
}

.guanf-platform-card p {
  color: #666;
  margin-bottom: 20px;
  min-height: 60px;
}

/* Trust Section */
.guanf-trust-section {
  padding: 80px 0;
  background: white;
}

.guanf-trust-section h2 {
  text-align: center;
  font-size: 2.2rem;
  margin-bottom: 50px;
  color: #1e1e1e;
}

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

.guanf-trust-item {
  text-align: center;
}

.guanf-trust-item h3 {
  color: #1e1e1e;
  margin: 15px 0 10px;
  font-size: 1.3rem;
}

/* Guide Section */
.guanf-guide-section {
  padding: 60px 0;
  background: #f8f9fa;
}

.guanf-guide-section h2 {
  text-align: center;
  margin-bottom: 40px;
}

.guanf-install-steps {
  max-width: 800px;
  margin: 0 auto 30px;
  padding-left: 20px;
  font-size: 1.1rem;
}

.guanf-install-steps li {
  margin-bottom: 15px;
}

.guanf-install-steps ul {
  margin-top: 10px;
  padding-left: 20px;
}

/* FAQ Section */
.guanf-faq-section {
  padding: 80px 0;
  background: white;
}

.guanf-faq-section h2 {
  text-align: center;
  margin-bottom: 50px;
}

.guanf-faq-item {
  margin-bottom: 20px;
  border: 1px solid #eee;
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

.guanf-faq-item label {
  display: block;
  padding: 20px;
  font-weight: 600;
  font-size: 1.1rem;
  cursor: pointer;
  background: #fafafa;
  user-select: none;
}

.guanf-faq-item input[type="checkbox"] {
  display: none;
}

.guanf-faq-content {
  padding: 0 20px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease, padding 0.3s ease;
  background: white;
}

.guanf-faq-item input[type="checkbox"]:checked ~ .guanf-faq-content {
  max-height: 500px;
  padding: 20px;
}

/* Footer */
footer {
  background: #1e1e1e;
  color: #aaa;
  padding: 40px 0;
  text-align: center;
  font-size: 0.95rem;
}

footer a {
  color: #ddd;
  text-decoration: none;
  margin: 0 10px;
}

footer a:hover {
  color: #f0b90b;
  text-decoration: underline;
}

.guanf-disclaimer {
  margin-top: 20px;
  font-size: 0.85rem;
}

/* Responsive Design */
@media (max-width: 992px) {
  .guanf-nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #1e1e1e;
    flex-direction: column;
    padding: 20px;
    box-shadow: 0 5px 10px rgba(0,0,0,0.1);
  }
  
  .guanf-nav-links.guanf-active {
    display: flex;
  }
  
  .guanf-nav-links li {
    margin: 10px 0;
  }
  
  .guanf-mobile-menu-btn {
    display: block;
  }
  
  .guanf-platform-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  
  .guanf-announcement-title {
    white-space: normal;
  }
  
  .guanf-announcement-scroll {
    white-space: normal;
    animation: none;
    padding-left: 0;
  }
  
  .guanf-announcement-scroll a,
.guanf-announcement-scroll a:visited,
.guanf-announcement-scroll a:hover {
    color: #1e1e1e;
    text-decoration: none;
}

  
  .guanf-banner-container {
    flex-direction: column;
    text-align: center;
  }
  
  .guanf-banner-content {
    flex-direction: column;
    margin-bottom: 15px;
  }
  
  .guanf-banner-logo {
    margin-right: 0;
    margin-bottom: 10px;
  }
  
  .guanf-banner-buttons {
    justify-content: center;
  }
}

@media (max-width: 768px) {
  .guanf-hero h1 {
    font-size: 2.2rem;
  }
  .guanf-subtitle {
    font-size: 1.1rem;
  }
  .guanf-download-buttons {
    display: flex;
    flex-direction: column;
    align-items: center;
  }
  .guanf-btn {
    width: 90%;
    max-width: 320px;
  }
  .guanf-app-preview img {
    margin-top: 30px;
  }
  .guanf-platform-grid {
    grid-template-columns: 1fr;
  }
  .guanf-announcement-container {
    flex-direction: column;
    align-items: flex-start;
  }
  .guanf-announcement-title {
    margin-bottom: 10px;
  }
  .guanf-banner-text h3 {
    font-size: 1.1rem;
  }
  .guanf-banner-btn {
    padding: 8px 20px;
    font-size: 0.9rem;
  }
}

@media (max-width: 480px) {
  .guanf-hero {
    padding: 80px 0 60px;
  }
  .guanf-container {
    width: 95%;
  }
  .guanf-banner-buttons {
    flex-direction: column;
    gap: 10px;
    width: 100%;
  }
  .guanf-banner-btn {
    width: 100%;
    justify-content: center;
  }
}