/* ========================================
   爱袁在线 - 布局样式
   ======================================== */

/* ========================================
   容器 (Container)
   ======================================== */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

@media (min-width: 640px) {
  .container { max-width: var(--container-sm); }
}

@media (min-width: 768px) {
  .container { max-width: var(--container-md); }
}

@media (min-width: 1024px) {
  .container { max-width: var(--container-lg); }
}

@media (min-width: 1280px) {
  .container { max-width: var(--container-xl); }
}

/* ========================================
   网格系统 (Grid System)
   ======================================== */
.grid {
  display: grid;
  gap: var(--spacing-md);
}

.grid-cols-1 { grid-template-columns: repeat(1, minmax(0, 1fr)); }
.grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
.grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }

/* 响应式网格 */
@media (min-width: 640px) {
  .sm\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (min-width: 768px) {
  .md\:grid-cols-2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .md\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .md\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
}

@media (min-width: 1024px) {
  .lg\:grid-cols-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .lg\:grid-cols-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
  .lg\:grid-cols-5 { grid-template-columns: repeat(5, minmax(0, 1fr)); }
  .lg\:grid-cols-6 { grid-template-columns: repeat(6, minmax(0, 1fr)); }
}

/* ========================================
   Flexbox 布局
   ======================================== */
.flex { display: flex; }
.inline-flex { display: inline-flex; }
.flex-col { flex-direction: column; }
.flex-wrap { flex-wrap: wrap; }
.flex-1 { flex: 1 1 0%; }
.flex-shrink-0 { flex-shrink: 0; }

.items-start { align-items: flex-start; }
.items-center { align-items: center; }
.items-end { align-items: flex-end; }
.items-stretch { align-items: stretch; }

.justify-start { justify-content: flex-start; }
.justify-center { justify-content: center; }
.justify-end { justify-content: flex-end; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

/* ========================================
   头部 (Header)
   ======================================== */
.header {
  background-color: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--gray-200);
  position: sticky;
  top: 0;
  z-index: var(--z-sticky);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 var(--spacing-md);
}

.header-logo {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-xl);
  font-weight: var(--font-bold);
  color: var(--primary);
  text-decoration: none;
}

.header-logo:hover {
  text-decoration: none;
  color: var(--primary-dark);
}

.header-logo img {
  width: 40px;
  height: 40px;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
}

.header-nav a {
  font-size: var(--text-sm);
  font-weight: var(--font-medium);
  color: var(--text-secondary);
  text-decoration: none;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
}

.header-nav a:hover {
  color: var(--primary);
  background-color: rgba(255, 107, 53, 0.1);
  text-decoration: none;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

/* 移动端菜单按钮 */
.header-menu-btn {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  background-color: var(--gray-100);
  color: var(--text-primary);
  font-size: 20px;
  cursor: pointer;
  border: none;
}

@media (max-width: 767px) {
  .header-menu-btn {
    display: inline-flex;
  }
  
  .header-nav {
    display: none;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    background-color: var(--bg-light);
    border-bottom: 2px solid var(--gray-200);
    flex-direction: column;
    padding: var(--spacing-md);
    box-shadow: var(--shadow-lg);
  }
  
  .header-nav.active {
    display: flex;
  }
}

/* ========================================
   底部 (Footer)
   ======================================== */
.footer {
  background-color: var(--gray-900);
  color: var(--gray-300);
  padding: var(--spacing-2xl) 0 var(--spacing-lg);
  margin-top: var(--spacing-3xl);
}

.footer-inner {
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-md);
}

.footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-xl);
  margin-bottom: var(--spacing-xl);
}

.footer-section h4 {
  font-size: var(--text-lg);
  color: var(--text-inverse);
  margin-bottom: var(--spacing-md);
}

.footer-section ul {
  list-style: none;
}

.footer-section li {
  margin-bottom: var(--spacing-sm);
}

.footer-section a {
  color: var(--gray-400);
  text-decoration: none;
  transition: color var(--transition-fast);
}

.footer-section a:hover {
  color: var(--primary-light);
}

.footer-bottom {
  border-top: 1px solid var(--gray-700);
  padding-top: var(--spacing-lg);
  text-align: center;
  font-size: var(--text-sm);
  color: var(--gray-500);
}

/* ========================================
   主内容区 (Main Content)
   ======================================== */
.main {
  min-height: calc(100vh - 64px - 200px); /* 视口高度 - 头部 - 底部 */
  padding: var(--spacing-xl) 0;
}

/* ========================================
   页面标题 (Page Header)
   ======================================== */
.page-header {
  background: var(--bg-primary);
  padding: var(--spacing-2xl) 0;
  margin-bottom: var(--spacing-xl);
  color: var(--text-inverse);
}

.page-header h1 {
  font-size: var(--text-3xl);
  color: var(--text-inverse);
  margin-bottom: var(--spacing-sm);
}

.page-header p {
  font-size: var(--text-lg);
  color: rgba(255, 255, 255, 0.9);
}

/* ========================================
   面包屑 (Breadcrumb)
   ======================================== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  font-size: var(--text-sm);
  color: var(--text-muted);
  margin-bottom: var(--spacing-md);
}

.breadcrumb a {
  color: var(--text-secondary);
  text-decoration: none;
}

.breadcrumb a:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  color: var(--gray-300);
}

/* ========================================
   分页 (Pagination)
   ======================================== */
.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin-top: var(--spacing-xl);
}

.pagination button {
  min-width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--gray-200);
  border-radius: var(--radius-md);
  background-color: var(--bg-light);
  color: var(--text-primary);
  font-weight: var(--font-medium);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.pagination button:hover:not(:disabled) {
  border-color: var(--primary);
  color: var(--primary);
}

.pagination button.active {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--text-inverse);
}

.pagination button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* ========================================
   空状态 (Empty State)
   ======================================== */
.empty-state {
  text-align: center;
  padding: var(--spacing-3xl) var(--spacing-md);
}

.empty-state .icon {
  font-size: 64px;
  margin-bottom: var(--spacing-md);
  opacity: 0.5;
}

.empty-state h3 {
  font-size: var(--text-xl);
  color: var(--text-primary);
  margin-bottom: var(--spacing-sm);
}

.empty-state p {
  font-size: var(--text-base);
  color: var(--text-muted);
  margin-bottom: var(--spacing-lg);
}

/* ========================================
   响应式工具类
   ======================================== */
/* 移动端隐藏 */
@media (max-width: 767px) {
  .hide-mobile {
    display: none !important;
  }
}

/* 平板及以上隐藏 */
@media (min-width: 768px) {
  .hide-desktop {
    display: none !important;
  }
}

/* 打印隐藏 */
@media print {
  .no-print {
    display: none !important;
  }
}