* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
        }
        
        :root {
            --primary: #1a3a5f;
            --secondary: #2c6e9b;
            --accent: #e74c3c;
            --light: #f8f9fa;
            --dark: #1c2b3f;
            --gray: #6c757d;
            --success: #28a745;
            --warning: #ffc107;
            --green-light: #d4edda;
            --green-dark: #155724;
            --card-bg: #ffffff;
            --shadow: 0 5px 15px rgba(0,0,0,0.05);
        }

        body {
            background-color: #f0f4f8;
            color: #333;
            line-height: 1.6;
        }
        
        .container {
            max-width: 1400px;
            margin: 0 auto;
            padding: 0 15px;
        }

        /* 头部样式 */
        header {
            background: linear-gradient(135deg, var(--primary), #0e2a47);
            color: white;
            padding: 0;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            z-index: 1000;
        }
        
        .top-bar {
            background-color: rgba(0,0,0,0.2);
            padding: 8px 0;
            font-size: 14px;
        }
        
        .top-bar-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .top-links a {
            color: #e0e6ed;
            text-decoration: none;
            margin-right: 15px;
            transition: color 0.3s;
        }
        
        .top-links a:hover {
            color: white;
        }
        
        .top-links a i {
            margin-right: 5px;
        }
        
        .header-main {
            padding: 15px 0;
        }
        
        .header-content {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .logo {
            display: flex;
            align-items: center;
            font-size: 28px;
            font-weight: 700;
            color: white;
            text-decoration: none;
        }
        
        .logo i {
            color: var(--warning);
            margin-right: 10px;
            font-size: 32px;
        }
        
        .logo span {
            color: #ffd43b;
        }
        
        .search-box {
            flex: 1;
            max-width: 600px;
            margin: 0 30px;
            position: relative;
        }
        
        .search-box input {
            width: 100%;
            padding: 14px 25px;
            border-radius: 50px;
            border: none;
            font-size: 16px;
            box-shadow: 0 2px 15px rgba(0,0,0,0.1);
        }
        
        .search-box button {
            position: absolute;
            right: 10px;
            top: 50%;
            transform: translateY(-50%);
            background: var(--secondary);
            border: none;
            color: white;
            width: 42px;
            height: 42px;
            border-radius: 50%;
            cursor: pointer;
            transition: all 0.3s;
            font-size: 18px;
        }
        
        .search-box button:hover {
            background: #1e5a80;
            transform: translateY(-50%) scale(1.05);
        }
        
        .user-actions {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        
        .btn {
            display: inline-flex;
            align-items: center;
            padding: 12px 24px;
            border-radius: 50px;
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s;
            cursor: pointer;
            border: none;
            font-size: 16px;
            gap: 8px;
        }
        
        .btn-login {
            background-color: transparent;
            color: white;
            border: 2px solid rgba(255,255,255,0.3);
        }
        
        .btn-register {
            background-color: var(--warning);
            color: var(--dark);
        }
        
        .btn-login:hover, .btn-register:hover {
            opacity: 0.9;
            transform: translateY(-3px);
            box-shadow: 0 4px 10px rgba(0,0,0,0.15);
        }
        
        /* 导航菜单 */
        .main-nav {
            background-color: rgba(0,0,0,0.15);
            border-top: 1px solid rgba(255,255,255,0.1);
        }
        
        .nav-container {
            position: relative;
        }
        
        .nav-menu {
            display: flex;
            list-style: none;
            justify-content: space-between;
            overflow-x: auto;
            padding: 5px 0;
        }
        
        .nav-menu::-webkit-scrollbar {
            height: 5px;
        }
        
        .nav-menu::-webkit-scrollbar-thumb {
            background-color: var(--secondary);
            border-radius: 10px;
        }
        
        .nav-item {
            position: relative;
            padding: 10px 0;
            flex-shrink: 0;
        }
        
        .nav-item > a {
            color: white;
            text-decoration: none;
            padding: 12px 20px;
            display: flex;
            align-items: center;
            font-weight: 500;
            transition: all 0.3s;
            border-radius: 6px;
            white-space: nowrap;
            gap: 8px;
        }
        
        .nav-item > a:hover {
            background-color: rgba(255,255,255,0.1);
        }
        
        /* 英雄区域 */
        .hero-section {
            background: linear-gradient(rgba(26, 58, 95, 0.85), rgba(26, 58, 95, 0.9)), 
                        url('https://images.unsplash.com/photo-1504307651254-35680f356dfd?ixlib=rb-4.0.3') no-repeat center center;
            background-size: cover;
            color: white;
            padding: 80px 0;
            text-align: center;
            margin-bottom: 40px;
            border-radius: 0 0 20px 20px;
        }
        
        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .hero-title {
            font-size: 48px;
            margin-bottom: 20px;
            text-shadow: 0 2px 8px rgba(0,0,0,0.2);
        }
        
        .hero-subtitle {
            font-size: 22px;
            margin-bottom: 30px;
            opacity: 0.9;
            font-weight: 300;
        }
        
        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 40px;
            margin-top: 40px;
            flex-wrap: wrap;
        }
        
        .stat-item {
            background: rgba(255,255,255,0.15);
            padding: 20px 30px;
            border-radius: 12px;
            min-width: 180px;
            backdrop-filter: blur(10px);
        }
        
        .stat-number {
            font-size: 36px;
            font-weight: 700;
            margin-bottom: 5px;
            color: var(--warning);
        }
        
        .stat-label {
            font-size: 16px;
            opacity: 0.85;
        }
        
        /* 分类展示区 */
        .section-title {
            font-size: 28px;
            color: var(--dark);
            margin-bottom: 25px;
            padding-bottom: 15px;
            border-bottom: 2px solid #e9ecef;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .section-title i {
            background: var(--secondary);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .categories-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
            margin-bottom: 50px;
        }
        
        .category-card {
            background: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: all 0.3s;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        
        .category-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 12px 25px rgba(0,0,0,0.1);
        }
        
        .category-header {
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: white;
            padding: 20px;
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .category-icon {
            width: 50px;
            height: 50px;
            background: rgba(255,255,255,0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .category-title {
            font-size: 20px;
            font-weight: 600;
        }
        
        .category-count {
            font-size: 14px;
            opacity: 0.9;
            margin-top: 5px;
        }
        
        .category-links {
            padding: 20px;
            flex-grow: 1;
        }
        
        .category-links a {
            display: block;
            padding: 10px 0;
            color: var(--dark);
            text-decoration: none;
            transition: all 0.3s;
            border-bottom: 1px dashed #eee;
        }
        
        .category-links a:last-child {
            border-bottom: none;
        }
        
        .category-links a:hover {
            color: var(--secondary);
            padding-left: 8px;
        }
        
        .category-links a i {
            margin-right: 10px;
            color: var(--secondary);
        }
        
        .category-footer {
            background: #f8f9fa;
            padding: 15px 20px;
            text-align: right;
        }
        
        .view-more {
            color: var(--secondary);
            text-decoration: none;
            font-weight: 600;
            display: flex;
            align-items: center;
            gap: 5px;
        }
        
        /* 资源展示区 */
        .resources-section {
            margin-bottom: 50px;
        }
        
        .tab-container {
            background: var(--card-bg);
            border-radius: 12px;
            overflow: hidden;
            box-shadow: var(--shadow);
        }
        
        .tabs {
            display: flex;
            background: #f8f9fa;
            border-bottom: 1px solid #e9ecef;
        }
        
        .tab {
            padding: 18px 30px;
            cursor: pointer;
            font-weight: 600;
            color: var(--gray);
            transition: all 0.3s;
            position: relative;
        }
        
        .tab.active {
            color: var(--secondary);
        }
        
        .tab.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            height: 3px;
            background: var(--secondary);
        }
        
        .tab-content {
            display: none;
            padding: 25px;
        }
        
        .tab-content.active {
            display: block;
        }
        
        .resources-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 25px;
        }
        
        .resource-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.05);
            transition: all 0.3s;
        }
        
        .resource-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 10px 25px rgba(0,0,0,0.1);
        }
        
        .resource-thumb {
            height: 180px;
            background: linear-gradient(135deg, #f0f4f8, #e2e8f0);
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--secondary);
            font-size: 48px;
        }
        
        .resource-card-content {
            padding: 20px;
        }
        
        .resource-card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 10px;
            height: 50px;
            overflow: hidden;
            display: block;
            text-decoration: none;
            transition: color 0.3s;
        }
        
        .resource-card-title:hover {
            color: var(--secondary);
        }
        
        .resource-card-meta {
            display: flex;
            justify-content: space-between;
            color: var(--gray);
            font-size: 14px;
            margin-bottom: 15px;
            padding-bottom: 15px;
            border-bottom: 1px solid #eee;
        }
        
        .resource-card-footer {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        
        .resource-card-downloads {
            color: var(--secondary);
            font-weight: 600;
        }
        
        .resource-card-btn {
            background: var(--secondary);
            color: white;
            border: none;
            padding: 8px 15px;
            border-radius: 4px;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s;
            text-decoration: none;
            display: inline-block;
        }
        
        .resource-card-btn:hover {
            background: #1e5a80;
        }
        
        /* 特色服务区 */
        .features-section {
            background: linear-gradient(135deg, #1a3a5f, #0e2a47);
            color: white;
            padding: 70px 0;
            margin: 50px 0;
            border-radius: 20px;
        }
        
        .features-container {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }
        
        .feature-card {
            background: rgba(255,255,255,0.1);
            border-radius: 15px;
            padding: 35px 30px;
            text-align: center;
            transition: all 0.3s;
            backdrop-filter: blur(10px);
        }
        
        .feature-card:hover {
            transform: translateY(-10px);
            background: rgba(255,255,255,0.15);
        }
        
        .feature-icon {
            width: 80px;
            height: 80px;
            background: rgba(255,255,255,0.15);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 25px;
            font-size: 32px;
            color: var(--warning);
        }
        
        .feature-title {
            font-size: 22px;
            margin-bottom: 15px;
        }
        
        .feature-desc {
            font-size: 16px;
            opacity: 0.85;
            line-height: 1.7;
        }
        
        /* 上传资料提示 */
        .upload-section {
            background: linear-gradient(135deg, var(--success), #1e7e34);
            color: white;
            padding: 40px;
            border-radius: 15px;
            margin: 50px 0;
            text-align: center;
            box-shadow: var(--shadow);
        }
        
        .upload-content {
            max-width: 800px;
            margin: 0 auto;
        }
        
        .upload-title {
            font-size: 32px;
            margin-bottom: 20px;
        }
        
        .upload-desc {
            font-size: 18px;
            margin-bottom: 30px;
            opacity: 0.9;
        }
        
        .btn-upload {
            background: white;
            color: var(--success);
            font-weight: 700;
            padding: 15px 40px;
            border-radius: 50px;
            font-size: 18px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            transition: all 0.3s;
        }
        
        .btn-upload:hover {
            transform: translateY(-5px);
            box-shadow: 0 8px 20px rgba(0,0,0,0.2);
        }
        
        /* 页脚 */
        footer {
            background: linear-gradient(135deg, var(--dark), #121f33);
            color: white;
            padding: 60px 0 20px;
            margin-top: 50px;
        }
        
        .footer-content {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            margin-bottom: 40px;
        }
        
        .footer-column h3 {
            margin-bottom: 25px;
            font-size: 20px;
            position: relative;
            padding-bottom: 12px;
        }
        
        .footer-column h3::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 50px;
            height: 3px;
            background: var(--secondary);
        }
        
        .footer-column ul {
            list-style: none;
        }
        
        .footer-column ul li {
            margin-bottom: 12px;
        }
        
        .footer-column ul li a {
            color: #bdc3c7;
            text-decoration: none;
            transition: color 0.3s;
            display: block;
            padding: 5px 0;
        }
        
        .footer-column ul li a:hover {
            color: white;
            transform: translateX(5px);
        }
        
        .footer-column ul li a i {
            width: 20px;
            margin-right: 10px;
            color: var(--secondary);
        }
        
        .daohangt {
            color: #bdc3c7;
            text-align: center;
            padding: 20px 0;
        }
        
        .daohangt a {
            color: #bdc3c7;
            text-decoration: none;
            margin: 0 10px;
            transition: color 0.3s;
        }
        
        .daohangt a:hover {
            color: white;
        }
        
        .copyright {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255,255,255,0.1);
            color: #8a9bb0;
            font-size: 15px;
            line-height: 1.8;
        }
        
        /* 响应式设计 */
        @media (max-width: 1200px) {
            .footer-content {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 992px) {
            .header-content {
                flex-wrap: wrap;
            }
            
            .search-box {
                order: 3;
                max-width: 100%;
                margin: 15px 0;
            }
            
            .hero-title {
                font-size: 36px;
            }
            
            .hero-subtitle {
                font-size: 18px;
            }
            
            .stat-item {
                min-width: 150px;
                padding: 15px 20px;
            }
        }
        
        @media (max-width: 768px) {
            .nav-menu {
                justify-content: flex-start;
            }
            
            .user-actions {
                display: none;
            }
            
            .hero-section {
                padding: 50px 0;
            }
            
            .hero-title {
                font-size: 28px;
            }
            
            .stat-item {
                min-width: 120px;
                padding: 12px 15px;
            }
            
            .stat-number {
                font-size: 28px;
            }
            
            .features-container {
                grid-template-columns: 1fr;
            }
            
            .footer-content {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 576px) {
            .top-bar-content {
                flex-direction: column;
                gap: 8px;
            }
            
            .logo {
                font-size: 22px;
            }
            
            .section-title {
                font-size: 24px;
            }
            
            .section-title i {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }
            
            .categories-grid {
                grid-template-columns: 1fr;
            }
            
            .resources-grid {
                grid-template-columns: 1fr;
            }






        }

		  .points-banner {
            background: linear-gradient(135deg, #1a3a5f, #2c6e9b);
            padding: 20px 30px;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }
        
        .points-banner::before {
            content: "";
            position: absolute;
            top: -50%;
            left: -50%;
            width: 200%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 70%);
            transform: rotate(30deg);
            z-index: 1;
        }
        
        .banner-content {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 15px;
            font-size: 20px;
            font-weight: 500;
        }
        
        .banner-content i {
            color: #ffd43b;
            font-size: 24px;
            animation: pulse 2s infinite;
        }
        
        @keyframes pulse {
            0% { transform: scale(1); }
            50% { transform: scale(1.1); }
            100% { transform: scale(1); }
        }
        
        .highlight {
            color: #ffd43b;
            font-weight: 600;
            text-shadow: 0 0 5px rgba(255, 212, 59, 0.5);
        }
        
        /* 响应式设计 */
        @media (max-width: 600px) {
            .banner-content {
                flex-direction: column;
                gap: 10px;
                font-size: 18px;
            }
            
            .points-banner {
                padding: 15px 20px;
            }
        }

		        .section-title {
            font-size: 28px;
            color: var(--dark);
            margin: 40px 0 25px;
            padding-bottom: 15px;
            border-bottom: 2px solid var(--secondary);
            display: flex;
            align-items: center;
            gap: 15px;
        }
        
        .section-title i {
            background: var(--secondary);
            color: white;
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
        }
        
        .resource-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 25px;
            margin-bottom: 50px;
        }
        
        .resource-card {
            background: white;
            border-radius: 12px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.08);
            transition: all 0.4s;
            display: flex;
            flex-direction: column;
            height: 100%;
        }
        
        .resource-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0,0,0,0.15);
        }
        
        .resource-image {
            height: 200px;
            position: relative;
            overflow: hidden;
        }
        
        .resource-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        
        .resource-card:hover .resource-image img {
            transform: scale(1.05);
        }
        
        .image-overlay {
            position: absolute;
            bottom: 0;
            left: 0;
            right: 0;
            background: linear-gradient(transparent, rgba(0,0,0,0.7));
            padding: 15px;
            color: white;
        }
        
        .resource-badge {
            position: absolute;
            top: 15px;
            right: 15px;
            background: var(--warning);
            color: var(--dark);
            padding: 5px 15px;
            border-radius: 20px;
            font-size: 14px;
            font-weight: 600;
            z-index: 2;
        }
        
        .resource-content {
            padding: 20px;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        .resource-title {
            font-size: 20px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 12px;
            line-height: 1.4;
        }
        
        .resource-description {
            color: var(--gray);
            font-size: 14px;
            margin-bottom: 15px;
            line-height: 1.6;
            flex-grow: 1;
        }
        
        .resource-meta {
            display: flex;
            justify-content: space-between;
            color: var(--gray);
            font-size: 13px;
            margin-top: auto;
            padding-top: 15px;
            border-top: 1px solid #eee;
        }
        
        .download-btn {
            display: block;
            background: linear-gradient(135deg, var(--secondary), var(--primary));
            color: white;
            text-align: center;
            padding: 12px;
            border-radius: 6px;
            text-decoration: none;
            font-weight: 600;
            margin-top: 15px;
            transition: all 0.3s;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
        }
        
        .download-btn:hover {
            background: linear-gradient(135deg, #1e5a80, #153a5f);
            transform: translateY(-3px);
        }
        
        .recommended-section {
            margin-top: 50px;
        }
        
        /* 响应式设计 */
        @media (max-width: 992px) {
            .resource-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        
        @media (max-width: 768px) {
            .section-title {
                font-size: 24px;
            }
            
            .section-title i {
                width: 40px;
                height: 40px;
                font-size: 18px;
            }
            
            .resource-image {
                height: 180px;
            }
        }
        
        @media (max-width: 576px) {
            .resource-grid {
                grid-template-columns: 1fr;
            }
            
            .points-notice p {
                font-size: 16px;
            }
            
            .header h1 {
                font-size: 28px;
            }
        }