/* ==================== 公共样式 ==================== */

/* 全局重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Microsoft YaHei', Arial, sans-serif; background: #f0f8ff; color: #333; font-size: 14px; }
a { text-decoration: none; color: #3498db; }
a:hover { color: #2980b9; }

/* 顶部栏 */
.top-bar { background: linear-gradient(135deg, #3498db, #5dade2); color: #fff; padding: 8px 0; font-size: 12px; }
.top-bar .container { max-width: 1200px; margin: 0 auto; padding: 0 15px; display: flex; justify-content: space-between; align-items: center; }
.top-bar a { color: #fff; margin: 0 8px; }
.top-bar-left { font-size: 12px; color: rgba(255,255,255,0.9); }
.top-bar-right { display: flex; gap: 20px; }
.top-bar-right a { font-size: 12px; color: rgba(255,255,255,0.9); transition: color 0.2s; }
.top-bar-right a:hover { color: #fff; }

/* 头部 */
.header { background: #fff; padding: 15px 0; box-shadow: 0 2px 8px rgba(0,0,0,0.1); }
.header .container { max-width: 1200px; margin: 0 auto; padding: 0 15px; display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 28px; font-weight: bold; color: #3498db; }
.logo span { color: #2980b9; }
.search-form { display: flex; width: 400px; margin-left: auto; }
.search-form input { flex: 1; height: 40px; padding: 0 15px; border: 2px solid #3498db; border-right: none; font-size: 14px; outline: none; border-radius: 20px 0 0 20px; }
.search-form button { height: 40px; padding: 0 25px; background: #3498db; color: #fff; border: none; font-size: 14px; border-radius: 0 20px 20px 0; cursor: pointer; }
.user-area { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.user-link { padding: 8px 16px; border-radius: 20px; font-size: 13px; transition: all 0.3s; border: 1px solid transparent; }
.user-link:first-child { background: #3498db; color: #fff; }
.user-link:first-child:hover { background: #2980b9; }
.user-link:last-child { border-color: #d1d5db; color: #666; background: #fff; }
.user-link:last-child:hover { border-color: #3498db; color: #3498db; }

/* 导航 */
.nav-bar { background: #3498db; box-shadow: 0 2px 4px rgba(0,0,0,0.1); }
.nav-bar .container { max-width: 1200px; margin: 0 auto; display: flex; flex-wrap: wrap; }
.nav-bar a { display: block; padding: 12px 20px; color: #fff; font-size: 14px; transition: background 0.3s; }
.nav-bar a:hover { background: rgba(255,255,255,0.15); }
.nav-bar .active a { background: rgba(255,255,255,0.2); }

/* 面包屑 */
.breadcrumb { max-width: 1200px; margin: 15px auto; padding: 10px 15px; background: #fff; border-radius: 5px; font-size: 12px; color: #666; }
.breadcrumb a { color: #3498db; }
.breadcrumb span { margin: 0 8px; color: #999; }

/* 主容器 */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 15px; box-sizing: border-box; }

/* 页脚 */
.footer { background: #fff; padding: 30px 0; text-align: center; margin-top: 30px; border-top: 3px solid #3498db; }
.footer p { font-size: 12px; color: #888; line-height: 2; }

/* 空状态 */
.empty { text-align: center; padding: 40px; color: #999; }

/* ==================== 响应式样式 ==================== */
@media (max-width: 768px) {
    .top-bar .container { flex-direction: column; gap: 8px; }
    .header .container { flex-wrap: wrap; gap: 10px; }
    .logo { font-size: 24px; }
    .search-form { width: 100%; order: 3; }
    .user-area { margin-left: auto; }
    .nav-bar .container { flex-wrap: wrap; justify-content: center; }
    .nav-bar a { padding: 10px 14px; font-size: 13px; }
    .breadcrumb { max-width: 100%; }
}
@media (max-width: 480px) {
    .nav-bar a { padding: 8px 10px; font-size: 12px; }
    .logo { font-size: 20px; }
    .search-form input { height: 36px; font-size: 13px; }
    .search-form button { height: 36px; font-size: 13px; }
}