* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", "PingFang SC", sans-serif;
        }
        
        
        .header {
            background: linear-gradient(135deg, #1e6fd9, #0a4daa);
            color: white;
            padding: 40px 0;
            text-align: center;
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
        }
        
        .header h1 {
            font-size: 2.8rem;
            margin-bottom: 10px;
            letter-spacing: 2px;
        }
        
        .subtitle {
            font-size: 1.1rem;
            max-width: 700px;
            margin: 15px auto 0;
            font-weight: 300;
            opacity: 0.9;
            padding: 0 20px;
        }
        
        .mission-statement {
            background: white;
            padding: 25px;
            border-radius: 8px;
            box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
            text-align: center;
            margin-bottom: 35px;
            position: relative;
        }
        
        .mission-statement h2 {
            color: #1e6fd9;
            font-size: 1.4rem;
            margin-bottom: 15px;
        }
        
        .mission-statement p {
            margin: 10px 0;
            color: #555;
            font-size: 1rem;
        }
        
        .recruitment-types {
            display: flex;
            gap: 25px;
            flex-wrap: wrap;
        }
        
        .recruitment-column {
            flex: 1;
            min-width: 300px;
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
            transition: transform 0.3s ease;
        }
        
        .recruitment-column:hover {
            transform: translateY(-5px);
        }
        
        .column-header {
            background: #1e6fd9;
            color: white;
            padding: 20px;
            text-align: center;
            font-size: 1.4rem;
        }
        
        .social-header {
            background: linear-gradient(to right, #1e6fd9, #0a4daa);
        }
        
        .campus-header {
            background: linear-gradient(to right, #27ae60, #2ecc71);
        }
        
        .job-list {
            list-style: none;
        }
        
        .job-item {
            padding: 20px;
            border-bottom: 1px solid #eee;
            cursor: pointer;
            transition: background-color 0.3s;
        }
        
        .job-item:hover {
            background: #f8fafd;
        }
        
        .job-header {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .job-title {
            font-size: 1.2rem;
            font-weight: 600;
            color: #1e6fd9;
        }
        
        .job-meta {
            color: #777;
            font-size: 0.9rem;
            margin-top: 8px;
        }
        
        .expand-icon {
            font-size: 1.4rem;
            color: #999;
            transition: transform 0.3s;
        }
        
        .job-details {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.5s ease;
            background: #fafcff;
            border-radius: 6px;
            margin-top: 15px;
        }
        
        .job-details-content {
            padding: 20px;
        }
        
        .detail-section {
            margin-bottom: 20px;
        }
        
        .detail-section h3 {
            color: #1e6fd9;
            font-size: 1.1rem;
            margin-bottom: 12px;
            padding-bottom: 6px;
            border-bottom: 1px solid #e3eeff;
        }
        
        .detail-section ul {
            padding-left: 20px;
        }
        
        .detail-section li {
            margin-bottom: 8px;
            position: relative;
        }
        
        .detail-section li:before {
            content: "•";
            color: #1e6fd9;
            position: absolute;
            left: -15px;
        }
        
        .apply-btn {
            display: inline-block;
            background: #1e6fd9;
            color: white;
            padding: 10px 25px;
            border-radius: 4px;
            text-decoration: none;
            font-weight: 600;
            margin-top: 15px;
            transition: background 0.3s;
        }
        
        .apply-btn:hover {
            background: #0a4daa;
        }
        
        .active .expand-icon {
            transform: rotate(180deg);
            color: #1e6fd9;
        }
        
        .active .job-details {
            max-height: 1000px;
        }
        
        .footer {
            background: #222;
            color: #ddd;
            text-align: center;
            padding: 30px 0;
            margin-top: 40px;
            font-size: 0.9rem;
        }
        
        .footer-links {
            margin: 15px 0;
        }
        
        .footer-links a {
            color: #aaa;
            margin: 0 10px;
            text-decoration: none;
        }
        
        .footer-links a:hover {
            color: white;
        }