@charset "UTF-8";
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Segoe UI", Tahoma, Geneva, Verdana, sans-serif;
  line-height: 1.6;
  color: #333;
  background-color: #f7f7f7;
}

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

.navbar {
  background-color: #1877F2;
  padding: 1rem 0;
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}
.navbar .nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.navbar .nav-logo a {
  text-decoration: none;
}
.navbar .nav-logo a h2 {
  color: #ffffff;
  font-size: 1.8rem;
  font-weight: bold;
  text-decoration: none;
}
.navbar .nav-menu {
  display: flex;
  list-style: none;
  gap: 2rem;
}
.navbar .nav-menu .nav-link {
  color: #ffffff;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
  padding: 0.5rem 1rem;
  border-radius: 6px;
}
.navbar .nav-menu .nav-link:hover, .navbar .nav-menu .nav-link.active {
  background-color: rgba(255, 255, 255, 0.1);
}
.navbar .hamburger {
  display: none;
  flex-direction: column;
  cursor: pointer;
}
.navbar .hamburger .bar {
  width: 25px;
  height: 3px;
  background-color: #ffffff;
  margin: 3px 0;
  transition: 0.3s;
}

.hero {
  background: linear-gradient(135deg, #1877F2 0%, #3b5998 100%);
  color: #ffffff;
  padding: 120px 0 80px;
  text-align: center;
}
.hero .hero-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}
.hero h1 {
  font-size: 3.5rem;
  margin-bottom: 1rem;
  font-weight: 700;
}
.hero .hero-subtitle {
  font-size: 1.3rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}
.hero .cta-button {
  display: inline-block;
  background-color: #ffffff;
  color: #1877F2;
  padding: 15px 30px;
  text-decoration: none;
  border-radius: 8px;
  font-weight: 600;
  font-size: 1.1rem;
  transition: all 0.3s ease;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}
.hero .cta-button:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.about {
  padding: 80px 0;
  background-color: #ffffff;
}
.about .about-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.about .about-content h2 {
  font-size: 2.5rem;
  color: #3b5998;
  margin-bottom: 2rem;
}
.about .about-content p {
  font-size: 1.1rem;
  margin-bottom: 1.5rem;
  color: #555;
  line-height: 1.8;
}

.featured-book {
  padding: 80px 0;
  background-color: #ffffff;
}
.featured-book h1 {
  text-align: center;
  font-size: 2.5rem;
  color: #3b5998;
  margin-bottom: 3rem;
}
.featured-book .book-showcase {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  align-items: center;
}
.featured-book .book-showcase .book-image img {
  width: 100%;
  max-width: 300px;
  border-radius: 10px;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}
.featured-book .book-showcase .book-info h3 {
  font-size: 2rem;
  color: #3b5998;
  margin-bottom: 1rem;
}
.featured-book .book-showcase .book-info .book-price {
  font-size: 1.8rem;
  color: #1877F2;
  font-weight: bold;
  margin-bottom: 1rem;
}
.featured-book .book-showcase .book-info .book-description {
  font-size: 1.1rem;
  color: #555;
  margin-bottom: 1.5rem;
  line-height: 1.7;
}
.featured-book .book-showcase .book-info .book-features {
  list-style: none;
  margin-bottom: 2rem;
}
.featured-book .book-showcase .book-info .book-features li {
  padding: 0.5rem 0;
  color: #555;
  font-size: 1rem;
}
.featured-book .book-showcase .book-info .book-cta {
  background-color: #1877F2;
  color: #ffffff;
  padding: 15px 30px;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}
.featured-book .book-showcase .book-info .book-cta:hover {
  background-color: #3b5998;
  transform: translateY(-2px);
}
.featured-book .book-showcase .book-info .purchase-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #eef;
}
.featured-book .book-showcase .book-info .purchase-section .purchase-btn {
  background-color: #1877F2;
  color: #ffffff;
  padding: 18px 40px;
  border: none;
  border-radius: 8px;
  font-size: 1.2rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 1rem 0 1rem 0;
}
.featured-book .book-showcase .book-info .purchase-section .purchase-btn:hover {
  background-color: #3b5998;
  transform: translateY(-2px);
}

.description-book {
  padding: 80px 0;
  background-color: #dfe3ee;
}
.description-book .book-description-full h3, .description-book .book-description-full h4 {
  color: #3b5998;
  margin: 1.5rem 0 1rem;
}
.description-book .book-description-full p {
  color: #555;
  line-height: 1.7;
  margin-bottom: 1rem;
}
.description-book .book-description-full .learning-points {
  list-style: none;
  margin: 1rem 0;
}
.description-book .book-description-full .learning-points li {
  padding: 0.5rem 0;
  color: #555;
  position: relative;
  padding-left: 1.5rem;
}
.description-book .book-description-full .learning-points li:before {
  content: "✓";
  color: #1877F2;
  font-weight: bold;
  position: absolute;
  left: 0;
}
.description-book .book-description-full .purchase-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #eef;
}
.description-book .book-description-full .purchase-section .purchase-btn {
  background-color: #1877F2;
  color: #ffffff;
  padding: 18px 40px;
  border: none;
  border-radius: 8px;
  font-size: 1.2rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin: 1rem 0 1rem 0;
}
.description-book .book-description-full .purchase-section .purchase-btn:hover {
  background-color: #3b5998;
  transform: translateY(-2px);
}
.description-book .book-details {
  padding: 100px 0 80px;
  background-color: #ffffff;
}
.description-book .book-details .book-details-content {
  display: grid;
  grid-template-columns: 30% 70%;
  gap: 3rem;
  align-items: start;
}
.description-book .book-details .book-details-content .book-cover-large img {
  width: 100%;
  border-radius: 10px;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.2);
}
.description-book .book-details .book-details-content .book-info-detailed h1 {
  font-size: 2.8rem;
  color: #3b5998;
  margin-bottom: 0.5rem;
}
.description-book .book-details .book-details-content .book-info-detailed .book-author {
  font-size: 1.2rem;
  color: #666;
  margin-bottom: 1rem;
}
.description-book .book-details .book-details-content .book-info-detailed .book-rating {
  margin-bottom: 1rem;
}
.description-book .book-details .book-details-content .book-info-detailed .book-rating .stars {
  color: #ffc107;
  font-size: 1.2rem;
}
.description-book .book-details .book-details-content .book-info-detailed .book-rating .rating-text {
  color: #666;
  margin-left: 0.5rem;
}
.description-book .book-details .book-details-content .book-info-detailed .book-price-large {
  font-size: 2.2rem;
  color: #1877F2;
  font-weight: bold;
  margin-bottom: 2rem;
}
.description-book .book-details .book-details-content .book-info-detailed .book-specs {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem;
  margin: 1.5rem 0;
}
.description-book .book-details .book-details-content .book-info-detailed .book-specs .spec-item {
  background-color: #dfe3ee;
  padding: 1rem;
  border-radius: 6px;
  color: #555;
}
.description-book .book-details .book-details-content .purchase-section {
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid #eee;
}
.description-book .book-details .book-details-content .purchase-section .purchase-btn {
  background-color: #1877F2;
  color: #ffffff;
  padding: 18px 40px;
  border: none;
  border-radius: 8px;
  font-size: 1.2rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-bottom: 1rem;
}
.description-book .book-details .book-details-content .purchase-section .purchase-btn:hover {
  background-color: #3b5998;
  transform: translateY(-2px);
}
.description-book .book-details .book-details-content .purchase-section .purchase-note {
  color: #666;
  font-size: 0.9rem;
  line-height: 1.5;
}

.table-of-contents {
  padding: 60px 0;
  background-color: #dfe3ee;
}
.table-of-contents h2 {
  text-align: center;
  font-size: 2.2rem;
  color: #3b5998;
  margin-bottom: 2rem;
}
.table-of-contents .toc-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}
.table-of-contents .toc-grid .toc-column {
  background-color: #ffffff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}
.table-of-contents .toc-grid .toc-column h4 {
  color: #1877F2;
  margin-bottom: 1rem;
  font-size: 1.3rem;
}
.table-of-contents .toc-grid .toc-column ul {
  list-style: none;
}
.table-of-contents .toc-grid .toc-column ul li {
  padding: 0.5rem 0;
  color: #555;
  border-bottom: 1px solid #eee;
}
.table-of-contents .toc-grid .toc-column ul li:last-child {
  border-bottom: none;
}

.testimonials {
  padding: 80px 0;
  background-color: #ffffff;
}
.testimonials h2 {
  text-align: center;
  font-size: 2.5rem;
  color: #3b5998;
  margin-bottom: 3rem;
}
.testimonials .testimonials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 2rem;
}
.testimonials .testimonials-grid .testimonial {
  background-color: #dfe3ee;
  padding: 2rem;
  border-radius: 10px;
  text-align: center;
}
.testimonials .testimonials-grid .testimonial p {
  font-style: italic;
  color: #555;
  margin-bottom: 1.5rem;
  line-height: 1.6;
}
.testimonials .testimonials-grid .testimonial .testimonial-author strong {
  color: #3b5998;
  display: block;
  margin-bottom: 0.5rem;
}
.testimonials .testimonials-grid .testimonial .testimonial-author span {
  color: #666;
  font-size: 0.9rem;
}

.blog-header {
  background: linear-gradient(135deg, #1877F2 0%, #3b5998 100%);
  color: #ffffff;
  padding: 120px 0 60px;
  text-align: center;
}
.blog-header h1 {
  font-size: 3rem;
  margin-bottom: 1rem;
}
.blog-header p {
  font-size: 1.2rem;
  opacity: 0.9;
}

.blog-posts {
  padding: 80px 0;
  background-color: #ffffff;
}
.blog-posts .blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
  gap: 2rem;
  margin-bottom: 3rem;
}
.blog-posts .blog-grid .blog-post {
  background-color: #ffffff;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
}
.blog-posts .blog-grid .blog-post:hover {
  transform: translateY(-5px);
}
.blog-posts .blog-grid .blog-post .post-image {
  height: 200px;
  overflow: hidden;
}
.blog-posts .blog-grid .blog-post .post-image img {
  width: 100%;
  height: 100%;
  -o-object-fit: cover;
     object-fit: cover;
}
.blog-posts .blog-grid .blog-post .post-content {
  padding: 1.5rem;
}
.blog-posts .blog-grid .blog-post .post-content .post-meta {
  display: flex;
  gap: 1rem;
  margin-bottom: 1rem;
}
.blog-posts .blog-grid .blog-post .post-content .post-meta .post-date,
.blog-posts .blog-grid .blog-post .post-content .post-meta .post-category {
  font-size: 0.9rem;
  color: #666;
}
.blog-posts .blog-grid .blog-post .post-content .post-meta .post-category {
  background-color: #1877F2;
  color: #ffffff;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
}
.blog-posts .blog-grid .blog-post .post-content h2 {
  color: #3b5998;
  margin-bottom: 1rem;
  font-size: 1.3rem;
}
.blog-posts .blog-grid .blog-post .post-content p {
  color: #555;
  line-height: 1.6;
  margin-bottom: 1rem;
}
.blog-posts .blog-grid .blog-post .post-content .read-more {
  color: #1877F2;
  text-decoration: none;
  font-weight: 600;
}
.blog-posts .blog-grid .blog-post .post-content .read-more:hover {
  text-decoration: underline;
}
.blog-posts .pagination {
  text-align: center;
}
.blog-posts .pagination .page-link {
  display: inline-block;
  padding: 0.5rem 1rem;
  margin: 0 0.25rem;
  color: #1877F2;
  text-decoration: none;
  border: 1px solid #1877F2;
  border-radius: 4px;
  transition: all 0.3s ease;
}
.blog-posts .pagination .page-link:hover, .blog-posts .pagination .page-link.active {
  background-color: #1877F2;
  color: #ffffff;
}

.newsletter {
  padding: 60px 0;
  background-color: #1877F2;
  color: #ffffff;
  text-align: center;
}
.newsletter h2 {
  font-size: 2.2rem;
  margin-bottom: 1rem;
}
.newsletter p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
  opacity: 0.9;
}
.newsletter .newsletter-form {
  display: flex;
  max-width: 500px;
  margin: 0 auto;
  gap: 1rem;
}
.newsletter .newsletter-form input {
  flex: 1;
  padding: 12px;
  border: none;
  border-radius: 6px;
  font-size: 1rem;
}
.newsletter .newsletter-form button {
  background-color: #ffffff;
  color: #1877F2;
  padding: 12px 24px;
  border: none;
  border-radius: 6px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}
.newsletter .newsletter-form button:hover {
  background-color: #f7f7f7;
}

.payment-section {
  padding: 100px 0 80px;
  background-color: #f7f7f7;
}
.payment-section .payment-container {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 3rem;
  max-width: 1000px;
  margin: 0 auto;
}
.payment-section .payment-container .order-summary {
  background-color: #ffffff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
  height: -moz-fit-content;
  height: fit-content;
}
.payment-section .payment-container .order-summary h2 {
  color: #3b5998;
  margin-bottom: 1.5rem;
}
.payment-section .payment-container .order-summary .order-item {
  display: flex;
  gap: 1rem;
  margin-bottom: 2rem;
}
.payment-section .payment-container .order-summary .order-item .order-book-image {
  width: 80px;
  height: 100px;
  -o-object-fit: cover;
     object-fit: cover;
  border-radius: 6px;
}
.payment-section .payment-container .order-summary .order-item .order-details {
  flex: 1;
}
.payment-section .payment-container .order-summary .order-item .order-details h3 {
  color: #3b5998;
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}
.payment-section .payment-container .order-summary .order-item .order-details p {
  color: #666;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
}
.payment-section .payment-container .order-summary .order-item .order-details .order-price {
  color: #1877F2;
  font-weight: bold;
  font-size: 1.2rem;
}
.payment-section .payment-container .order-summary .order-total {
  border-top: 1px solid #eee;
  padding-top: 1rem;
}
.payment-section .payment-container .order-summary .order-total .total-line {
  display: flex;
  justify-content: space-between;
  margin-bottom: 0.5rem;
  color: #555;
}
.payment-section .payment-container .order-summary .order-total .total-line.total-final {
  font-weight: bold;
  font-size: 1.2rem;
  color: #3b5998;
  border-top: 1px solid #eee;
  padding-top: 0.5rem;
  margin-top: 0.5rem;
}
.payment-section .payment-container .payment-form {
  background-color: #ffffff;
  padding: 2rem;
  border-radius: 10px;
  box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}
.payment-section .payment-container .payment-form h2 {
  color: #3b5998;
  margin-bottom: 1.5rem;
}
.payment-section .payment-container .payment-form .payment-methods {
  margin-bottom: 2rem;
}
.payment-section .payment-container .payment-form .payment-methods h3 {
  color: #3b5998;
  margin-bottom: 1rem;
}
.payment-section .payment-container .payment-form .payment-methods .payment-options {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.payment-section .payment-container .payment-form .payment-methods .payment-options .payment-option {
  display: flex;
  align-items: center;
  padding: 1rem;
  border: 2px solid #eee;
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.3s ease;
}
.payment-section .payment-container .payment-form .payment-methods .payment-options .payment-option:hover {
  border-color: #1877F2;
}
.payment-section .payment-container .payment-form .payment-methods .payment-options .payment-option input[type=radio] {
  margin-right: 1rem;
}
.payment-section .payment-container .payment-form .payment-methods .payment-options .payment-option input[type=radio]:checked + .payment-option-content {
  color: #1877F2;
}
.payment-section .payment-container .payment-form .payment-methods .payment-options .payment-option .payment-option-content {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.payment-section .payment-container .payment-form .payment-methods .payment-options .payment-option .payment-option-content .payment-icon {
  font-size: 1.5rem;
}
.payment-section .payment-container .payment-form .payment-form-section .form-group {
  margin-bottom: 1rem;
}
.payment-section .payment-container .payment-form .payment-form-section .form-group label {
  display: block;
  margin-bottom: 0.5rem;
  color: #3b5998;
  font-weight: 500;
}
.payment-section .payment-container .payment-form .payment-form-section .form-group input {
  width: 100%;
  padding: 12px;
  border: 1px solid #ddd;
  border-radius: 6px;
  font-size: 1rem;
  transition: border-color 0.3s ease;
}
.payment-section .payment-container .payment-form .payment-form-section .form-group input:focus {
  outline: none;
  border-color: #1877F2;
}
.payment-section .payment-container .payment-form .payment-form-section .form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.payment-section .payment-container .payment-form .payment-form-section .pay-button {
  width: 100%;
  background-color: #1877F2;
  color: #ffffff;
  padding: 15px;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
  margin-top: 1rem;
}
.payment-section .payment-container .payment-form .payment-form-section .pay-button:hover {
  background-color: #3b5998;
}
.payment-section .payment-container .payment-form .paypal-container {
  text-align: center;
  padding: 2rem 0;
}
.payment-section .payment-container .payment-form .paypal-container p {
  color: #666;
  margin-bottom: 2rem;
}
.payment-section .payment-container .payment-form .paypal-container .paypal-button {
  background-color: #0070ba;
  color: #ffffff;
  padding: 15px 30px;
  border: none;
  border-radius: 8px;
  font-size: 1.1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.3s ease;
}
.payment-section .payment-container .payment-form .paypal-container .paypal-button:hover {
  background-color: #005ea6;
}
.payment-section .payment-container .payment-form .security-notice {
  margin-top: 2rem;
  padding: 1rem;
  background-color: #dfe3ee;
  border-radius: 6px;
  text-align: center;
}
.payment-section .payment-container .payment-form .security-notice p {
  color: #666;
  font-size: 0.9rem;
}

.footer {
  background-color: #3b5998;
  color: #ffffff;
  padding: 3rem 0 1rem;
}
.footer .footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 2rem;
  margin-bottom: 2rem;
}
.footer .footer-content .footer-section h3, .footer .footer-content .footer-section h4 {
  margin-bottom: 1rem;
  color: #ffffff;
}
.footer .footer-content .footer-section p {
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.6;
  margin-bottom: 0.5rem;
}
.footer .footer-content .footer-section ul {
  list-style: none;
}
.footer .footer-content .footer-section ul li {
  margin-bottom: 0.5rem;
}
.footer .footer-content .footer-section ul li a {
  color: rgba(255, 255, 255, 0.8);
  text-decoration: none;
  transition: color 0.3s ease;
}
.footer .footer-content .footer-section ul li a:hover {
  color: #ffffff;
}
.footer .footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.2);
  padding-top: 1rem;
  text-align: center;
}
.footer .footer-bottom p {
  color: rgba(255, 255, 255, 0.6);
}

@media (max-width: 768px) {
  .navbar .nav-menu {
    position: fixed;
    left: -100%;
    top: 70px;
    flex-direction: column;
    background-color: #1877F2;
    width: 100%;
    text-align: center;
    transition: 0.3s;
    box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
    padding: 2rem 0;
  }
  .navbar .nav-menu.active {
    left: 0;
  }
  .navbar .nav-menu .nav-item {
    margin: 1rem 0;
  }
  .navbar .hamburger {
    display: flex;
  }
  .navbar .hamburger.active .bar:nth-child(2) {
    opacity: 0;
  }
  .navbar .hamburger.active .bar:nth-child(1) {
    transform: translateY(8px) rotate(45deg);
  }
  .navbar .hamburger.active .bar:nth-child(3) {
    transform: translateY(-8px) rotate(-45deg);
  }
  .hero {
    padding: 100px 0 60px;
  }
  .hero h1 {
    font-size: 2.5rem;
  }
  .hero .hero-subtitle {
    font-size: 1.1rem;
  }
  .featured-book .book-showcase {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .book-details .book-details-content {
    grid-template-columns: 1fr;
    text-align: center;
  }
  .payment-section .payment-container {
    grid-template-columns: 1fr;
  }
  .newsletter .newsletter-form {
    flex-direction: column;
  }
  .toc-grid {
    grid-template-columns: 1fr;
  }
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
  .blog-grid {
    grid-template-columns: 1fr;
  }
}
@media (max-width: 480px) {
  .container {
    padding: 0 15px;
  }
  .hero h1 {
    font-size: 2rem;
  }
  .about h2,
  .featured-book h2 {
    font-size: 2rem;
  }
  .book-details .book-info-detailed h1 {
    font-size: 2rem;
  }
  .payment-section .payment-container {
    padding: 0 15px;
  }
}/*# sourceMappingURL=main.css.map */