/**
 * Blog styles
 */

/* Hero Section */
.blog-hero {
  background: linear-gradient(135deg, var(--bg-oxford-blue) 0%, var(--bg-oxford-blue-2) 100%);
  padding: 120px 0 60px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.blog-hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle at center, rgba(52, 152, 219, 0.1) 0%, transparent 70%);
}

.blog-hero .hero-content {
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.blog-hero .headline-lg {
  color: var(--text-white);
  margin-bottom: 20px;
  font-size: clamp(2.5rem, 5vw, 4rem);
  animation: fadeInDown 0.5s ease forwards;
}

.blog-hero .hero-text {
  color: var(--text-columbia-blue);
  font-size: var(--fs-5);
  line-height: 1.8;
  animation: fadeInUp 0.5s ease forwards 0.2s;
}

/* Blog Header */
.blog-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 30px;
  margin-bottom: 50px;
  position: relative;
}

.blog-categories {
  display: flex;
  gap: 10px;
  margin-bottom: 30px;
  position: relative;
  background: var(--bg-oxford-blue-2);
  padding: 15px;
  border-radius: 40px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.blog-categories .category-btn {
  background: var(--bg-oxford-blue);
  color: var(--text-white);
  padding: 10px 20px;
  border-radius: 30px;
  font-size: var(--fs-6);
  font-weight: var(--fw-500);
  transition: 0.25s ease;
  border: 1px solid var(--border-prussian-blue);
}

.blog-categories .category-btn:is(:hover, :focus, .active) {
  background: var(--bg-carolina-blue);
  border-color: var(--bg-carolina-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(52, 152, 219, 0.2);
}

/* 下拉菜单样式 */
.categories-dropdown {
  position: relative;
  display: none; /* 默认隐藏 */
  background: var(--bg-oxford-blue-2);
  padding: 15px;
  border-radius: 40px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  min-width: 200px;
}

.categories-dropdown .dropdown-toggle {
  background: var(--bg-oxford-blue);
  color: var(--text-white);
  padding: 12px 25px;
  border-radius: 30px;
  font-size: var(--fs-6);
  font-weight: var(--fw-500);
  transition: 0.25s ease;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  cursor: pointer;
  border: 1px solid var(--border-prussian-blue);
  width: 100%;
}

.categories-dropdown .dropdown-toggle:hover {
  background: var(--bg-carolina-blue);
  border-color: var(--bg-carolina-blue);
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(52, 152, 219, 0.2);
}

.categories-dropdown .dropdown-toggle ion-icon {
  font-size: 1.2em;
  transition: transform 0.3s ease;
}

.categories-dropdown.active .dropdown-toggle ion-icon {
  transform: rotate(180deg);
}

.categories-dropdown .dropdown-menu {
  position: absolute;
  top: calc(100% + 5px);
  left: 0;
  right: 0;
  background: var(--bg-oxford-blue-2);
  border-radius: 20px;
  padding: 10px;
  margin-top: 5px;
  display: none;
  z-index: 100;
  box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
  border: 1px solid var(--border-prussian-blue);
  backdrop-filter: blur(10px);
}

.categories-dropdown.active .dropdown-menu {
  display: block;
  animation: dropdownFadeIn 0.3s ease forwards;
}

.categories-dropdown .dropdown-item {
  padding: 12px 20px;
  color: var(--text-white);
  font-size: var(--fs-6);
  cursor: pointer;
  border-radius: 15px;
  transition: all 0.25s ease;
  text-align: left;
  width: 100%;
  background: var(--bg-oxford-blue);
  border: 1px solid var(--border-prussian-blue);
  margin-bottom: 5px;
}

.categories-dropdown .dropdown-item:last-child {
  margin-bottom: 0;
}

.categories-dropdown .dropdown-item:hover {
  background: var(--bg-carolina-blue);
  border-color: var(--bg-carolina-blue);
  transform: translateX(5px);
  box-shadow: 0 4px 8px rgba(52, 152, 219, 0.2);
}

.categories-dropdown .dropdown-item.active {
  background: var(--bg-carolina-blue);
  border-color: var(--bg-carolina-blue);
  box-shadow: 0 4px 8px rgba(52, 152, 219, 0.2);
}

@keyframes dropdownFadeIn {
  from {
    opacity: 0;
    transform: translateY(-10px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* 响应式布局 */
@media (max-width: 768px) {
  .blog-categories {
    display: none;
  }
  
  .categories-dropdown {
    display: block;
    width: 100%;
    max-width: 300px;
  }

  .categories-dropdown .dropdown-toggle {
    padding: 15px 25px;
  }

  .categories-dropdown .dropdown-item {
    padding: 15px 20px;
  }
}

/* 当分类按钮总宽度超过容器宽度时显示下拉菜单 */
@media (min-width: 769px) {
  .blog-categories {
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none; /* Firefox */
    -ms-overflow-style: none; /* IE and Edge */
  }
  
  .blog-categories::-webkit-scrollbar {
    display: none; /* Chrome, Safari, Opera */
  }
  
  .blog-categories.overflow {
    display: none;
  }
  
  .categories-dropdown.overflow {
    display: block;
    margin: 0 auto;
  }
}

/* Blog Cards */
.blog {
  padding-block: 40px;
  background-color: var(--bg-oxford-blue);
}

.blog .section-title {
  margin-bottom: 0;
  text-align: center;
  color: var(--text-white);
}

.blog-list {
  display: grid;
  gap: 20px;
  margin-bottom: 30px;
}

.blog-card {
  background-color: var(--bg-oxford-blue-2);
  border-radius: 15px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  transition: transform 0.3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
  padding: 15px;
}

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

.card-banner {
  position: relative;
  aspect-ratio: 16/9;
  background-color: var(--bg-oxford-blue-2);
  overflow: hidden;
}

.card-banner .img-cover {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.3s ease;
}

.blog-card:hover .card-banner .img-cover {
  transform: scale(1.05);
}

.card-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  background: var(--bg-carolina-blue);
  color: var(--text-white);
  padding: 6px 15px;
  border-radius: 50px;
  font-size: var(--fs-7);
  font-weight: var(--fw-500);
}

.card-content {
  padding: 15px;
  flex-grow: 1;
  display: flex;
  flex-direction: column;
  position: relative;
  min-height: 300px;
}

.time {
  color: var(--text-columbia-blue);
  font-size: var(--fs-6);
  font-weight: var(--fw-500);
  margin-bottom: 10px;
  display: block;
}

.card-title {
  margin-bottom: 10px;
  transition: color 0.3s ease;
  color: var(--text-white);
}

.card-title > a {
  color: inherit;
  transition: color 0.3s ease;
}

.card-title > a:hover {
  color: var(--text-carolina-blue);
}

.card-text {
  color: var(--text-columbia-blue);
  font-size: var(--fs-6);
  line-height: 1.6;
  margin-bottom: 15px;
}

.blog-card .btn-primary {
  padding: 8px 25px;
  font-size: var(--fs-6);
  background-color: var(--bg-carolina-blue);
  color: var(--text-white);
  transition: background-color 0.3s ease;
  position: absolute;
  bottom: 30px;
  left: 30px;
}

.blog-card .btn-primary:hover {
  background-color: var(--bg-carolina-blue-hover);
}

/* Animations */
@keyframes fadeInDown {
  from {
    opacity: 0;
    transform: translateY(-20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Contact section */
.contact {
  background-color: var(--bg-oxford-blue-2);
  padding-block: 60px;
}

.contact-content {
  text-align: center;
}

.contact .section-title {
  color: var(--text-white);
  margin-bottom: 30px;
}

/* Footer */
.footer {
  background: var(--primary-color);
  padding: 2rem 0;
  position: relative;
}

.footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, 
    transparent 0%, 
    rgba(255,255,255,0.2) 50%, 
    transparent 100%
  );
}

.footer .container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2rem;
}

.social-list {
  display: flex;
  gap: 1.5rem;
}

.social-link {
  color: var(--white);
  font-size: 1.5rem;
  transition: all 0.3s ease;
  opacity: 0.8;
}

.social-link:hover {
  color: var(--accent-color);
  opacity: 1;
  transform: translateY(-2px);
}

.footer .text-center {
  color: var(--white);
  opacity: 0.8;
}

.footer .text-center a {
  color: var(--white);
  text-decoration: none;
  transition: opacity 0.3s ease;
}

.footer .text-center a:hover {
  opacity: 1;
}

/* Responsive Design */
@media (min-width: 575px) {
  .blog-card {
    display: flex;
    align-items: center;
  }

  .card-banner {
    width: 40%;
    aspect-ratio: 3/3;
  }

  .card-content {
    width: 60%;
  }
}

@media (min-width: 768px) {
  .blog-header {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 30px;
  }

  .blog-header .section-title {
    margin-bottom: 0;
    text-align: left;
  }

  .blog-categories,
  .categories-dropdown {
    margin: 0;
  }

  .blog-list {
    grid-template-columns: 1fr 1fr;
    gap: 25px;
  }

  .blog-card {
    display: block;
    height: 100%;
  }

  .card-banner {
    width: 100%;
    aspect-ratio: 16/9;
  }

  .card-content {
    width: 100%;
  }
}

@media (min-width: 992px) {
  .blog-list {
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
  }
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: 10px;
  margin-right: 20px;
}

.lang-btn {
  background: none;
  border: 1px solid var(--border-prussian-blue);
  color: var(--text-columbia-blue);
  padding: 5px 10px;
  border-radius: 4px;
  font-size: var(--fs-7);
  cursor: pointer;
  transition: all 0.3s ease;
}

.lang-btn:hover,
.lang-btn.active {
  background: var(--bg-carolina-blue);
  border-color: var(--bg-carolina-blue);
  color: var(--text-white);
}

@media (max-width: 768px) {
  .lang-switcher {
    margin-right: 50px;
  }
  
  .lang-btn {
    padding: 4px 8px;
    font-size: var(--fs-8);
  }
} 

.categories-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
}

@media (min-width: 768px) {
  .categories-wrapper {
    align-items: flex-end;
  }
}