/* 组件样式 */

/* 按钮 */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  text-align: center;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-base) var(--ease-in-out);
  border: 2px solid transparent;
}

.btn-primary {
  background-color: var(--accent-orange);
  color: var(--white);
}

.btn-primary:hover {
  background-color: #d35400;
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--accent-gold);
  border-color: var(--accent-gold);
}

.btn-outline:hover {
  background-color: var(--accent-gold);
  color: var(--primary-dark);
}

/* 导航菜单 */
/* 导航栏 Logo */
.nav-logo {
  display: flex;
  align-items: center;
  flex: 0 1 auto;
  min-width: 0;
  font-size: 0.98rem;
  font-weight: var(--font-weight-semibold);
  color: var(--white);
  white-space: nowrap;
  margin: 0;
}

.nav-logo-text {
  display: block;
  max-width: 100%;
  letter-spacing: 0.01em;
  line-height: 1.15;
}

/* 导航菜单列表 */
.nav-menu {
  display: flex;
  align-items: center;
  gap: clamp(18px, 1.8vw, 34px);
  position: static;
  padding: 0;
  margin: 0;
  margin-left: auto;
  white-space: nowrap;
  list-style: none;
}

/* 导航链接 */
.nav-link {
  color: var(--white);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: var(--font-weight-medium);
  line-height: 1;
  padding: 10px 0;
  position: relative;
  transition: color var(--transition-base) var(--ease-in-out);
}

/* navbar 内部容器 */
.navbar .container {
  flex: 1;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -5px;
  left: 50%;
  transform: translateX(-50%) scaleX(0);
  width: 100%;
  height: 3px;
  background-color: var(--accent-gold);
  transition: transform var(--transition-base) var(--ease-in-out);
}

.nav-link:hover,
.nav-link.active {
  color: var(--accent-gold);
}

.nav-link:hover::after,
.nav-link.active::after {
  transform: translateX(-50%) scaleX(1);
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown-toggle {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  cursor: pointer;
  font: inherit;
  white-space: nowrap;
}

.nav-caret {
  width: 10px;
  height: 10px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: rotate(45deg) translateY(-1px);
  transition: transform var(--transition-base) var(--ease-in-out);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 50%;
  min-width: 188px;
  padding: 18px 0 10px;
  border-radius: 18px;
  background: rgba(0, 28, 58, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 20px 38px -22px rgba(0, 0, 0, 0.45);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateX(-50%) translateY(8px);
  transition: opacity var(--transition-base) var(--ease-in-out), transform var(--transition-base) var(--ease-in-out), visibility var(--transition-base) var(--ease-in-out);
  z-index: calc(var(--z-dropdown) + 2);
}

.nav-dropdown:hover .dropdown-menu,
.nav-dropdown.open .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateX(-50%) translateY(0);
}

.nav-dropdown:hover .nav-caret,
.nav-dropdown.open .nav-caret {
  transform: rotate(225deg) translateY(-1px);
}

.dropdown-item {
  display: block;
  padding: 10px 18px;
  font-size: 0.92rem;
  white-space: nowrap;
}

.dropdown-item::after {
  display: none;
}

.dropdown-item:hover,
.dropdown-item.active {
  background: rgba(255, 255, 255, 0.08);
  color: var(--accent-gold);
}

/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: var(--spacing-xs);
}

.hamburger span {
  display: block;
  width: 25px;
  height: 3px;
  background-color: var(--white);
  transition: all var(--transition-base) var(--ease-in-out);
  border-radius: var(--radius-sm);
}

.hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(8px, 8px);
}

.hamburger.active span:nth-child(2) {
  opacity: 0;
}

.hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -7px);
}

/* 卡片 */
.card {
  background-color: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-base) var(--ease-in-out);
  height: 100%;
}

.card:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-xl);
}

.card-image {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-md);
  background-color: var(--bg-light);
}

.card-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-sm);
}

.card-text {
  font-size: var(--font-size-base);
  color: var(--text-medium);
  line-height: 1.6;
}

/* 标签 */
.tag {
  display: inline-block;
  padding: var(--spacing-xs) var(--spacing-sm);
  font-size: var(--font-size-sm);
  background-color: var(--bg-light);
  color: var(--primary-color);
  border-radius: var(--radius-full);
  margin: 0 var(--spacing-xs) var(--spacing-xs) 0;
}

.tag-primary {
  background-color: var(--primary-color);
  color: var(--white);
}

.tag-accent {
  background-color: var(--accent-orange);
  color: var(--white);
}

/* 选项卡 */
.tabs {
  display: flex;
  gap: var(--spacing-md);
  border-bottom: 2px solid var(--bg-light);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.tab {
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  color: var(--text-medium);
  cursor: pointer;
  position: relative;
  transition: color var(--transition-base) var(--ease-in-out);
  border: none;
  background: none;
}

.tab::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 2px;
  background-color: var(--accent-orange);
  transform: scaleX(0);
  transition: transform var(--transition-base) var(--ease-in-out);
}

.tab:hover,
.tab.active {
  color: var(--primary-color);
}

.tab.active::after {
  transform: scaleX(1);
}

.tab-content {
  display: none;
}

.tab-content.active {
  display: block;
  animation: fadeIn var(--transition-base) var(--ease-in-out);
}

/* 轮播图 */
.carousel {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  z-index: 10;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.85);
  border: none;
  font-size: 24px;
  line-height: 1;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.2);
  transition: background 0.2s, transform 0.2s;
  color: #333;
}
.carousel-arrow:hover {
  background: #fff;
  transform: translateY(-50%) scale(1.1);
}
.carousel-arrow-prev { left: 12px; }
.carousel-arrow-next { right: 12px; }

.carousel-inner {
  position: relative;
  width: 100%;
  height: 400px;
}

.carousel-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity var(--transition-slow) var(--ease-in-out);
}

.carousel-slide.active {
  opacity: 1;
}

.carousel-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.carousel-caption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: var(--spacing-md);
  background: linear-gradient(to top, rgba(0, 0, 0, 0.7), transparent);
  color: var(--white);
}

.carousel-controls {
  position: absolute;
  bottom: var(--spacing-md);
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: var(--spacing-sm);
}

.carousel-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.5);
  cursor: pointer;
  transition: background-color var(--transition-base) var(--ease-in-out);
}

.carousel-dot.active {
  background-color: var(--accent-gold);
}

/* 向下滚动指示器 */
.scroll-indicator {
  position: absolute;
  bottom: var(--spacing-xl);
  left: 50%;
  transform: translateX(-50%);
  cursor: pointer;
  animation: bounce 2s infinite;
}

.scroll-indicator svg {
  width: 30px;
  height: 30px;
  fill: var(--white);
}

/* 图片占位符 */
.image-placeholder {
  width: 100%;
  height: 100%;
  background: linear-gradient(135deg, var(--bg-light) 0%, #e0e0e0 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-medium);
  font-size: var(--font-size-sm);
  text-align: center;
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
}

/* 时间线 */
.timeline-item {
  display: flex;
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-lg);
  border-bottom: 1px solid var(--bg-light);
}

.timeline-item:last-child {
  border-bottom: none;
}

.timeline-year {
  flex-shrink: 0;
  width: 80px;
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
  color: var(--accent-orange);
}

.timeline-content {
  flex: 1;
}

.timeline-title {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-semibold);
  color: var(--primary-color);
  margin-bottom: var(--spacing-xs);
}

.timeline-description {
  font-size: var(--font-size-base);
  color: var(--text-medium);
  line-height: 1.6;
}