/* 基础重置和通用样式 */
    * { box-sizing: border-box; margin: 0; padding: 0; }
    body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif; line-height: 1.5; color: #333; }
    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; height: auto; }
    .container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1rem; }
    
    /* 通用工具类 */
    .flex { display: flex; }
    .grid { display: grid; }
    .items-center { align-items: center; }
    .justify-between { justify-content: space-between; }
    .hidden { display: none !important; }
    .text-center { text-align: center; }
    .rounded { border-radius: 0.375rem; }
    .rounded-lg { border-radius: 0.5rem; }
    .rounded-xl { border-radius: 0.75rem; }
    .shadow-sm { box-shadow: 0 1px 2px 0 rgb(0 0 0 / 0.05); }
    .shadow-md { box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1); }
    .transition { transition: all 0.15s ease; }
    .justify-center {justify-content: center;} 
    .items-center { align-items: center; }
    /* 颜色类 */
    .bg-white { background-color: white; }
    .bg-gray-50 { background-color: #f9fafb; }
    .bg-gray-100 { background-color: #f3f4f6; }
    .bg-blue-50 { background-color: #eff6ff; }
    .text-gray-400 { color: #9ca3af; }
    .text-gray-500 { color: #6b7280; }
    .text-gray-600 { color: #4b5563; }
    .text-gray-700 { color: #374151; }
    .text-gray-900 { color: #111827; }
    .text-blue-500 { color: #3b82f6; }
    .text-blue-600 { color: #0080ff; }
    .text-red-500 { color: #ef4444; }
    
    /* 间距类 */
    .p-2 { padding: 0.5rem; }
    .py-2{padding-top:.5rem;padding-bottom:.5rem;margin-right: 0.5rem;}
    .px-3{padding-left:.75rem;padding-right:.75rem}
    .p-4 { padding: 1rem; }
    .px-4 { padding-left: 1rem; padding-right: 1rem; }
    .py-2 { padding-top: 0.5rem; padding-bottom: 0.5rem; }
    .py-8 { padding-top: 2rem; padding-bottom: 2rem; }
    .mb-3 { margin-bottom: 0.75rem; }
    .mb-4 { margin-bottom: 1rem; }
    .mb-6 { margin-bottom: 1.5rem; }
    .mt-8 { margin-top: 2rem; }
    .mt-12 {margin-top: 3rem;}
    .mt-16 { margin-top: 4rem; }
    .mx-auto { margin-left: auto; margin-right: auto; }
    .space-x-4{gap:0.5rem;padding-top:10px}
    
    /* 文本大小类 */
    .text-xs { font-size: 0.75rem; }
    .text-sm { font-size: 0.875rem; }
    .text-base { font-size: 1rem; }
    .text-lg { font-size: 1.125rem; }
    .text-xl { font-size: 1.25rem; }
    
    /* 字体粗细类 */
    .font-medium { font-weight: 500; }
    .font-bold { font-weight: 700; }
    
    /* 边框类 */
    .border { border: 1px solid #e5e7eb; }
    .border-t { border-top: 1px solid #e5e7eb; }
    .border-b { border-bottom: 1px solid #e5e7eb; }
    .rounded-md{border-radius:.375rem}
    .border-gray-300{--tw-border-opacity: 1;border-color:rgb(209 213 219 / var(--tw-border-opacity, 1))}
    
    /* 布局类 */
    .sticky { position: sticky; background-color:#ffffff; }
    .top-0 { top: 0; }
    .z-50 { z-index: 50; }
    .min-h-screen { min-height: 100vh; }
    .flex-grow { flex-grow: 1; }
    .flex-col { flex-direction: column; }
    .h-10 { height: 2.5rem; }
    .h-16 { height: 4rem; }
    .w-full { width: 100%; }
    .object-contain { object-fit: contain; }
    
    /* 特殊效果 */
    .backdrop-blur { backdrop-filter: blur(8px); }
    .line-clamp-2 { 
        display: -webkit-box;
        -webkit-line-clamp: 2;
        -webkit-box-orient: vertical;
        overflow: hidden;
    }
    
    /* 悬停效果 */
    .hover\:bg-gray-100:hover { background-color: #f3f4f6; }
    .hover\:text-blue-600:hover { color: #0080ff; }
    .hover\:shadow-md:hover { box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1); }
    
    /* ========== 桌面导航 ========== */
    .desktop-nav {
        display: flex;
        align-items: center;
        gap: 1rem;
        position: relative;
    }
    
    /* 主要导航项样式 */
    .nav-main-item {
        position: relative;
    }
    
    .nav-link {
        display: flex;
        align-items: center;
        padding: 0.5rem 0.75rem;
        font-size: 0.875rem;
        font-weight: 500;
        border-radius: 0.375rem;
        transition: all 0.15s ease;
        white-space: nowrap;
        color: #374151;
        cursor: pointer;
    }
    
    .nav-link:hover {
        background-color: #f3f4f6;
        color: #0080ff;
    }
    
    .nav-link.active {
        color: #0080ff;
        background-color: #eff6ff;
    }
    
    /* ========== 下拉菜单 ========== */
    .dropdown-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 320px;
        background: white;
        border: 1px solid #e5e7eb;
        border-radius: 0.5rem;
        box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
        padding: 1rem;
        z-index: 1000;
        opacity: 0;
        visibility: hidden;
        transform: translateY(-10px);
        transition: all 0.2s ease;
    }
    
    .dropdown-menu.show {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    .nav-main-item:hover .dropdown-menu {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }
    
    /* 添加下拉菜单箭头 */
    .dropdown-menu::before {
        content: '';
        position: absolute;
        top: -6px;
        left: 20px;
        width: 12px;
        height: 12px;
        background: white;
        border-left: 1px solid #e5e7eb;
        border-top: 1px solid #e5e7eb;
        transform: rotate(45deg);
    }
    
    /* 城市网格布局 */
    .city-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 0.5rem;
    }
    
    .city-link {
        display: block;
        padding: 0.5rem 0.25rem;
        text-align: center;
        font-size: 0.8125rem;
        border-radius: 0.25rem;
        transition: background-color 0.15s ease;
        color: #4b5563;
    }
    
    .city-link:hover {
        background-color: #f0f9ff;
        color: #0080ff;
    }
    
    /* 热门城市单独展示 */
    .hot-cities {
        display: flex;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .hot-city-link {
        padding: 0.5rem 0.75rem;
        background-color: #f8fafc;
        border: 1px solid #e2e8f0;
        border-radius: 0.375rem;
        font-size: 0.875rem;
        transition: all 0.15s ease;
        color: #374151;
    }
    
    .hot-city-link:hover {
        background-color: #e0f2fe;
        border-color: #bae6fd;
        color: #0080ff;
    }
    
    /* ========== 修复：搜索框样式 ========== */
    .nav-search {
        position: relative;
        min-width: 200px;
    }
    
    .nav-search input {
        width: 100%;
        padding: 0.5rem 0.75rem 0.5rem 2.5rem;
        border: 1px solid #e5e7eb;
        border-radius: 0.375rem;
        font-size: 0.875rem;
        outline: none;
        transition: border-color 0.15s ease;
    }
    
    .nav-search input:focus {
        border-color: #0080ff;
        box-shadow: 0 0 0 3px rgba(0, 128, 255, 0.1);
    }
    
    .nav-search button {
        position: absolute;
        left: 0.75rem;
        top: 50%;
        transform: translateY(-50%);
        background: none;
        border: none;
        color: #9ca3af;
        font-size: 0.875rem;
        cursor: pointer;
        padding: 0;
    }
    
    .nav-search button:hover {
        color: #0080ff;
    }
    
    /* ========== 移动端菜单按钮 ========== */
    .mobile-menu-btn {
        display: none;
        flex-direction: column;
        justify-content: space-between;
        width: 24px;
        height: 18px;
        background: transparent;
        border: none;
        cursor: pointer;
        padding: 0;
    }
    
    .mobile-menu-btn span {
        display: block;
        height: 2px;
        width: 100%;
        background-color: #4b5563;
        border-radius: 2px;
        transition: all 0.3s ease;
    }
    
    /* ========== 移动端菜单 ========== */
    .mobile-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 85%;
        max-width: 350px;
        height: 100vh;
        background-color: white;
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
        transition: right 0.3s ease;
        z-index: 100;
        overflow-y: auto;
        padding: 1.25rem;
    }
    
    .mobile-menu.active {
        right: 0;
    }
    
    .mobile-menu-overlay {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-color: rgba(0, 0, 0, 0.5);
        z-index: 99;
        opacity: 0;
        visibility: hidden;
        transition: opacity 0.3s ease, visibility 0.3s ease;
    }
    
    .mobile-menu-overlay.active {
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-menu-header {
        display: flex;
        justify-content: space-between;
        align-items: center;
        margin-bottom: 1.25rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid #e5e7eb;
    }
    
    .mobile-menu-close {
        background: none;
        border: none;
        font-size: 1.5rem;
        cursor: pointer;
        color: #6b7280;
        width: 32px;
        height: 32px;
        display: flex;
        align-items: center;
        justify-content: center;
        border-radius: 0.375rem;
    }
    
    .mobile-menu-close:hover {
        background-color: #f3f4f6;
    }
    
    /* ========== 移动端固定双列布局 ========== */
    .mobile-nav-section {
        margin-bottom: 1.5rem;
    }
    
    .mobile-nav-section-title {
        font-size: 0.875rem;
        font-weight: 600;
        color: #4b5563;
        margin-bottom: 0.75rem;
        padding-left: 0.25rem;
    }
    
    /* 移动端固定双列，无论屏幕大小 */
    .mobile-nav-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr); /* 固定双列 */
        gap: 0.5rem;
    }
    
    .mobile-nav-link {
        padding: 0.75rem 0.5rem;
        border-radius: 0.375rem;
        transition: background-color 0.2s;
        color: #374151;
        font-weight: 500;
        font-size: 0.875rem;
        text-align: center;
        border: 1px solid #f3f4f6;
        display: block;
    }
    
    .mobile-nav-link:hover {
        background-color: #f3f4f6;
        color: #0080ff;
        border-color: #e5e7eb;
    }
    
    .mobile-nav-link.active {
        color: #0080ff;
        background-color: #e0f2fe;
        border-color: #bae6fd;
    }
    
    /* 友情链接样式 */
    .friend-links {
        background-color: #f9fafb;
        border-top: 1px solid #e5e7eb;
        border-bottom: 1px solid #e5e7eb;
        padding: 1.5rem 0;
    }
    
    .friend-links-container {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
        max-width: 800px;
        margin: 0 auto;
    }
    
    /* 简化页脚样式 */
    .footer-simple {
        padding: 1.5rem 0;
        background-color: #f9fafb;
        border-top: 1px solid #e5e7eb;
    }
    
    /* 卡片样式 */
    .card {
        overflow: hidden;
        border: 1px solid #e5e7eb;
        background-color: white;
        border-radius: 0.75rem;
        transition: all 0.15s ease;
    }
    
    .card:hover {
        box-shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    }
    
    /* 招聘会卡片容器间距 */
    .cards-container {
        display: grid;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    /* 图标指示器 */
    .chevron-down {
        display: inline-block;
        margin-left: 0.25rem;
        font-size: 0.75rem;
        transition: transform 0.2s ease;
    }
    
    .nav-main-item:hover .chevron-down {
        transform: rotate(180deg);
    }
    
    /* 下拉菜单分隔线 */
    .dropdown-divider {
        height: 1px;
        background-color: #e5e7eb;
        margin: 0.75rem 0;
    }
    
    /* 下拉菜单标题 */
    .dropdown-title {
        font-size: 0.75rem;
        color: #6b7280;
        margin-bottom: 0.5rem;
        font-weight: 600;
        text-transform: uppercase;
        letter-spacing: 0.05em;
    }
    
    /* ========== 响应式设计 ========== */
    @media (max-width: 768px) {
        .mobile-menu-btn {
            display: flex;
        }
        .gap-2{gap:.5rem}
        .desktop-nav {
            display: none;
        }
        
        .nav-search {
            min-width: 100%;
            margin-bottom: 1rem;
        }
        
        /* 移动端始终保持双列 */
        .mobile-nav-grid {
            grid-template-columns: repeat(2, 1fr); /* 固定双列 */
        }
        
        /* 特殊：对于奇数个项目，最后一个项目跨两列居中 */
        .mobile-nav-grid:has(:nth-child(odd):last-child) a:last-child {
            grid-column: span 2;
            max-width: 50%;
            margin-left: auto;
            margin-right: auto;
        }
        
        .friend-links-container {
            gap: 0.75rem;
        }
        
        .cards-container {
            grid-template-columns: 1fr;
        }
    }
    
    @media (min-width: 768px) {
        .md\:grid-cols-3 {
            grid-template-columns: repeat(3, 1fr);
        }
        
        .md\:grid-cols-4 {
            grid-template-columns: repeat(4, 1fr);
        }
        
        .md\:hidden {
            display: none;
        }
        
        .cards-container {
            grid-template-columns: repeat(3, 1fr);
        }
    }