:root {
            --yale-blue: #00356b;
            --yale-dark-blue: #00274d;
            --yale-light-blue: #286dc0;
            --accent-gold: #ffd700;
            --light-gray: #f5f5f5;
            --medium-gray: #e0e0e0;
            --dark-gray: #333333;
            --text-color: #222222;
            --white: #ffffff;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
            --transition: all 0.3s ease;
        }

        /* 基础样式重置 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
        }

        body {
            color: var(--text-color);
            background-color: var(--white);
            line-height: 1.6;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        ul {
            list-style: none;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }

        .btn {
            display: inline-block;
            padding: 12px 24px;
            background-color: var(--yale-blue);
            color: var(--white);
            border: none;
            border-radius: 4px;
            font-weight: 600;
            cursor: pointer;
            transition: var(--transition);
        }

        .btn:hover {
            background-color: var(--yale-dark-blue);
            transform: translateY(-2px);
        }

        .btn-accent {
            background-color: var(--accent-gold);
            color: var(--text-color);
        }

        .btn-accent:hover {
            background-color: #e6c200;
        }

        .section {
            padding: 80px 0;
        }

        .section-title {
            font-size: 2.5rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 15px;
        }

        .section-title:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 80px;
            height: 4px;
            background-color: var(--accent-gold);
        }

        .section-subtitle {
            font-size: 1.2rem;
            color: var(--dark-gray);
            margin-bottom: 40px;
            max-width: 600px;
        }

        /* 无障碍工具栏样式 */
        .accessibility-toolbar {
            background-color: var(--yale-blue);
            color: var(--white);
            padding: 10px 0;
            font-size: 0.9rem;
        }

        .accessibility-toolbar .container {
            display: flex;
            justify-content: flex-end;
            align-items: center;
            gap: 20px;
        }

        .accessibility-controls {
            display: flex;
            gap: 15px;
        }

        .accessibility-btn {
            background: none;
            border: none;
            color: var(--white);
            cursor: pointer;
            display: flex;
            align-items: center;
            gap: 5px;
            font-size: 0.9rem;
        }

        .accessibility-btn:hover {
            color: var(--accent-gold);
        }

        /* 导航栏样式 */
        header {
            position: sticky;
            top: 0;
            background-color: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            z-index: 1000;
            box-shadow: var(--shadow);
        }

        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo img {
            height: 50px;
        }

        .logo-text {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--yale-blue);
        }

        .nav-menu {
            display: flex;
            gap: 30px;
        }

        .nav-item {
            position: relative;
        }

        .nav-link {
            font-weight: 600;
            padding: 10px 0;
            position: relative;
        }

        .nav-link.active {
            color: var(--yale-blue);
        }

        .nav-link.active:after {
            width: 100%;
        }

        .nav-link:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 0;
            height: 2px;
            background-color: var(--accent-gold);
            transition: var(--transition);
        }

        .nav-link:hover:after {
            width: 100%;
        }

        .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            background-color: var(--white);
            min-width: 200px;
            box-shadow: var(--shadow);
            border-radius: 4px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: var(--transition);
            z-index: 100;
        }

        .nav-item:hover .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown-item {
            padding: 12px 20px;
            border-bottom: 1px solid var(--medium-gray);
        }

        .dropdown-item:last-child {
            border-bottom: none;
        }

        .dropdown-item:hover {
            background-color: var(--light-gray);
        }

        .hamburger {
            display: none;
            background: none;
            border: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--yale-blue);
        }

        /* 英雄区域样式 */
        .hero {
            height: 80vh;
            background: linear-gradient(rgba(0, 53, 107, 0.7), rgba(0, 53, 107, 0.5)), url('https://images.unsplash.com/photo-1561070791-2526d30994b5?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1600&q=80') center/cover no-repeat;
            color: var(--white);
            display: flex;
            align-items: center;
            text-align: center;
        }

        .hero-content {
            max-width: 800px;
            margin: 0 auto;
        }

        .hero-title {
            font-size: 3.5rem;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .hero-subtitle {
            font-size: 1.5rem;
            margin-bottom: 40px;
            font-weight: 300;
        }

        .hero-buttons {
            display: flex;
            gap: 20px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* 特色部分样式 */
        .features {
            background-color: var(--light-gray);
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .feature-card {
            background-color: var(--white);
            border-radius: 8px;
            padding: 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .feature-card:hover {
            transform: translateY(-10px);
        }

        .feature-icon {
            font-size: 2.5rem;
            color: var(--yale-blue);
            margin-bottom: 20px;
        }

        .feature-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        /* 活动部分样式 */
        .events-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 30px;
        }

        .event-card {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);

            transition: var(--transition);
        }

        .event-card:hover {
            transform: translateY(-5px);
        }

        .event-image {
            height: 200px;
            background-color: #ddd;
            background-size: cover;
            background-position: center;
        }

        .event-content {
            padding: 20px;
        }

        .event-date {
            color: var(--yale-blue);
            font-weight: 600;
            margin-bottom: 10px;
        }

        .event-title {
            font-size: 1.3rem;
            margin-bottom: 10px;
        }

        /* 作品展示样式 */
        .works {
            background-color: var(--light-gray);
        }

        .works-filter {
            display: flex;
            gap: 15px;
            margin-bottom: 30px;
            flex-wrap: wrap;
        }

        .filter-btn {
            padding: 8px 16px;
            background-color: var(--white);
            border: 1px solid var(--medium-gray);
            border-radius: 30px;
            cursor: pointer;
            transition: var(--transition);
        }

        .filter-btn.active, .filter-btn:hover {
            background-color: var(--yale-blue);
            color: var(--white);
        }

        .works-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 25px;
        }

        .work-card {
            border-radius: 8px;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .work-card:hover {
            transform: scale(1.03);
        }

        .work-image {
            height: 250px;
            background-color: #ddd;
            background-size: cover;
            background-position: center;
        }

        .work-info {
            padding: 15px;
            background-color: var(--white);
        }

        .work-title {
            font-weight: 600;
            margin-bottom: 5px;
        }

        .work-meta {
            font-size: 0.9rem;
            color: var(--dark-gray);
        }

        /* 用户路径样式 */
        .user-paths {
            text-align: center;
        }

        .paths-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 30px;
            margin-top: 50px;
        }

        .path-card {
            background-color: var(--white);
            border-radius: 8px;
            padding: 40px 30px;
            box-shadow: var(--shadow);
            transition: var(--transition);
            border-top: 4px solid var(--yale-blue);
        }

        .path-card:hover {
            transform: translateY(-10px);
            border-top-color: var(--accent-gold);
        }

        .path-icon {
            font-size: 3rem;
            color: var(--yale-blue);
            margin-bottom: 20px;
        }

        .path-title {
            font-size: 1.5rem;
            margin-bottom: 15px;
        }

        /* 页脚样式 */
        footer {
            background-color: var(--yale-blue);
            color: var(--white);
            padding: 60px 0 30px;
        }

        .footer-content {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 40px;
            margin-bottom: 40px;
        }

        .footer-column h3 {
            font-size: 1.3rem;
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 10px;
        }

        .footer-column h3:after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background-color: var(--accent-gold);
        }

        .footer-links li {
            margin-bottom: 10px;
        }

        .footer-links a:hover {
            color: var(--accent-gold);
            padding-left: 5px;
        }

        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }

        .social-link {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background-color: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            transition: var(--transition);
        }

        .social-link:hover {
            background-color: var(--accent-gold);
            color: var(--text-color);
            transform: translateY(-3px);
        }

        .footer-bottom {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .nav-menu {
                display: none;
            }

            .hamburger {
                display: block;
            }

            .hero-title {
                font-size: 2.8rem;
            }

            .hero-subtitle {
                font-size: 1.3rem;
            }
        }

        @media (max-width: 768px) {
            .section {
                padding: 60px 0;
            }

            .section-title {
                font-size: 2rem;
            }

            .hero-title {
                font-size: 2.2rem;
            }

            .hero-subtitle {
                font-size: 1.1rem;
            }

            .hero-buttons {
                flex-direction: column;
                align-items: center;
            }

            .btn {
                width: 100%;
                max-width: 300px;
            }
        }

        /* 高对比度模式 */
        .high-contrast {
            --yale-blue: #000000;
            --yale-dark-blue: #000000;
            --light-gray: #f0f0f0;
            --accent-gold: #ffff00;
            --text-color: #000000;
            --dark-gray: #333333;
            --white: #ffffff;
            --medium-gray: #000000;
            --shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
        }

        /* 大字体模式 */
        .large-text {
            font-size: 120%;
        }

        .large-text .section-title {
            font-size: 3rem;
        }

        .large-text .hero-title {
            font-size: 4.2rem;
        }