/* ========================================
   布局样式 - 头部、尾部、侧边栏
   ======================================== */

/* ========== 页面整体布局 ========== */
.page-wrapper {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.main-content {
  flex: 1;
  padding: var(--spacing-lg) 0;
}

/* ========== 顶部导航栏 ========== */
.header {
  background-color: var(--bg-white);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 100;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 20px;
  font-weight: 700;
  color: var(--text-primary);
}

.logo-icon {
  width: 40px;
  height: 40px;
  background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.logo-text .site-name {
  font-size: 18px;
  font-weight: 700;
}

.logo-text .site-slogan {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 400;
}

/* 主导航 */
.main-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-xs);
}

.nav-item {
  position: relative;
  padding: 8px 16px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-primary);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.nav-item:hover {
  color: var(--primary-color);
  background-color: rgba(255, 107, 53, 0.08);
}

.nav-item.active {
  color: var(--primary-color);
}

.nav-item.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 50%;
  transform: translateX(-50%);
  width: 20px;
  height: 3px;
  background-color: var(--primary-color);
  border-radius: 2px;
}

/* 导航下拉菜单 */
.nav-dropdown {
  position: relative;
}

.nav-dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 160px;
  padding: var(--spacing-sm) 0;
  background-color: var(--bg-white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition-fast);
}

.nav-dropdown:hover .nav-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.nav-dropdown-item {
  display: block;
  padding: 10px 20px;
  font-size: 14px;
  color: var(--text-primary);
  transition: all var(--transition-fast);
}

.nav-dropdown-item:hover {
  background-color: var(--bg-light);
  color: var(--primary-color);
}

/* 头部搜索框 */
.header-search {
  width: 240px;
}

/* 头部操作区 */
.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

/* ========== 页面标题区 ========== */
.page-header {
  background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
  padding: var(--spacing-xl) 0;
  margin-bottom: var(--spacing-lg);
  color: #fff;
}

.page-title {
  font-size: 28px;
  font-weight: 700;
  color: #fff;
  margin-bottom: var(--spacing-xs);
}

.page-breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: 14px;
  opacity: 0.9;
}

.page-breadcrumb a {
  color: #fff;
  opacity: 0.8;
}

.page-breadcrumb a:hover {
  opacity: 1;
}

.page-breadcrumb .separator {
  opacity: 0.6;
}

/* ========== 内容布局 ========== */
.content-layout {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: var(--spacing-lg);
}

.content-main {
  min-width: 0;
}

.content-sidebar {
  position: sticky;
  top: 86px;
  height: fit-content;
}

/* 侧边栏卡片 */
.sidebar-card {
  background-color: var(--bg-white);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.sidebar-card-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--border-color);
}

.sidebar-card-title .icon {
  margin-right: var(--spacing-sm);
  color: var(--primary-color);
}

/* 热门排行 */
.rank-list {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.rank-item {
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
}

.rank-item:hover {
  background-color: var(--bg-light);
}

.rank-number {
  min-width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  background-color: var(--bg-light);
  color: var(--text-muted);
}

.rank-item:nth-child(1) .rank-number {
  background-color: #ff6b35;
  color: #fff;
}

.rank-item:nth-child(2) .rank-number {
  background-color: #ff8c5a;
  color: #fff;
}

.rank-item:nth-child(3) .rank-number {
  background-color: #ffb088;
  color: #fff;
}

.rank-content {
  flex: 1;
  min-width: 0;
}

.rank-title {
  font-size: 14px;
  color: var(--text-primary);
  line-height: 1.4;
}

.rank-title:hover {
  color: var(--primary-color);
}

.rank-meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* ========== 底部信息栏 ========== */
.footer {
  background-color: var(--secondary-color);
  color: #fff;
  margin-top: var(--spacing-xxl);
}

.footer-main {
  padding: var(--spacing-xxl) 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--spacing-xl);
}

.footer-brand {
  margin-bottom: var(--spacing-lg);
}

.footer-brand .logo {
  color: #fff;
  margin-bottom: var(--spacing-md);
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  max-width: 300px;
}

.footer-title {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  color: #fff;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.footer-link {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
}

.footer-link:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-contact {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
}

.footer-contact-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.footer-bottom {
  padding: var(--spacing-md) 0;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.5);
}

.footer-social {
  display: flex;
  gap: var(--spacing-sm);
}

.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(255, 255, 255, 0.1);
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.7);
  transition: all var(--transition-fast);
}

.footer-social a:hover {
  background-color: var(--primary-color);
  color: #fff;
}

/* ========== 返回顶部 ========== */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--primary-color);
  color: #fff;
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-normal);
  cursor: pointer;
  z-index: 99;
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--primary-dark);
  transform: translateY(-4px);
}

/* ========== 悬浮快捷入口 ========== */
.float-nav {
  position: fixed;
  right: 24px;
  top: 50%;
  transform: translateY(-50%);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
  z-index: 90;
}

.float-nav-item {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--bg-white);
  border-radius: 50%;
  box-shadow: var(--shadow-md);
  color: var(--text-secondary);
  transition: all var(--transition-fast);
}

.float-nav-item:hover {
  background-color: var(--primary-color);
  color: #fff;
  transform: scale(1.1);
}

.float-nav-item .tooltip {
  position: absolute;
  right: 54px;
  padding: 6px 12px;
  background-color: var(--secondary-color);
  color: #fff;
  font-size: 12px;
  border-radius: var(--radius-sm);
  white-space: nowrap;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-fast);
}

.float-nav-item:hover .tooltip {
  opacity: 1;
  visibility: visible;
}

/* ========== 响应式布局 ========== */
@media (max-width: 1024px) {
  .content-layout {
    grid-template-columns: 1fr;
  }
  
  .content-sidebar {
    position: static;
  }
  
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  
  .float-nav {
    display: none;
  }
}

@media (max-width: 768px) {
  .header-inner {
    height: 60px;
  }
  
  .main-nav {
    display: none;
  }
  
  .header-search {
    width: 180px;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-bottom-inner {
    flex-direction: column;
    gap: var(--spacing-sm);
    text-align: center;
  }
}