:root {
            --primary: #2563eb;
            --primary-dark: #1d4ed8;
            --secondary: #0ea5e9;
            --light: #f0f9ff;
            --dark: #1e293b;
            --accent: #f59e0b;
            --gray: #64748b;
            --light-gray: #f1f5f9;
            --font-family: "Noto Sans SC", "仿宋", "FangSong", serif;
        }
        
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        
        body {
            font-family: var(--font-family);
            line-height: 1.6;
            color: var(--dark);
            background-color: #ffffff;
            scroll-behavior: smooth;
        }
        
        h1, h2, h3, h4 {
            font-family: var(--font-family);
            font-weight: 700;
            line-height: 1.2;
            margin-bottom: 1rem;
        }
        
        h1 {
            font-size: 2.5rem;
        }
        
        h2 {
            font-size: 2rem;
            position: relative;
            padding-bottom: 0.5rem;
        }
        
        h2:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 4px;
            background: var(--accent);
            transition: width 0.3s ease;
        }
        
        h2:hover:after {
            width: 100px;
        }
        
        p {
            margin-bottom: 1rem;
        }
        
        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        
        .btn {
            display: inline-block;
            padding: 0.8rem 1.8rem;
            background: var(--primary);
            color: white;
            border-radius: 4px;
            text-decoration: none;
            font-weight: 500;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        }
        
        .btn:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
        }
        
        .btn-accent {
            background: var(--accent);
        }
        
        .btn-accent:hover {
            background: #e69008;
        }
        
        .section {
            padding: 5rem 0;
            opacity: 0;
            transform: translateY(20px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        
        .section.visible {
            opacity: 1;
            transform: translateY(0);
        }
        
        .section-title {
            text-align: center;
            margin-bottom: 3rem;
        }
        
        .section-title h2:after {
            left: 50%;
            transform: translateX(-50%);
        }
        
        /* Header Styles */
        header {
            background: white;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
            position: fixed;
            width: 100%;
            top: 0;
            z-index: 1000;
            transition: background-color 0.3s ease, padding 0.3s ease;
        }
        
        header.scrolled {
            background-color: rgba(255, 255, 255, 0.95);
            box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
        }
        
        .navbar {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 1rem 0;
        }
        
        .logo {
            font-size: 1.5rem;
            font-weight: 700;
            color: var(--primary);
            text-decoration: none;
            display: flex;
            align-items: center;
            transition: color 0.3s ease;
        }
        
        .logo:hover {
            color: var(--primary-dark);
        }
        
        .logo i {
            margin-right: 0.5rem;
            font-size: 1.8rem;
        }
        
        .nav-links {
            display: flex;
            list-style: none;
        }
        
        .nav-links li {
            margin-left: 2rem;
            position: relative;
        }
        
        .nav-links a {
            text-decoration: none;
            color: var(--dark);
            font-weight: 500;
            transition: color 0.3s;
            padding: 0.5rem 0;
        }
        
        .nav-links a:hover {
            color: var(--primary);
        }
        
        .nav-links a:after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            bottom: 0;
            left: 0;
            background-color: var(--primary);
            transition: width 0.3s ease;
        }
        
        .nav-links a:hover:after {
            width: 100%;
        }
        
        .mobile-toggle {
            display: none;
            font-size: 1.5rem;
            cursor: pointer;
            color: var(--dark);
            transition: color 0.3s ease;
        }
        
        .mobile-toggle:hover {
            color: var(--primary);
        }
        
        /* Hero Section */
        .hero {
            background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
            padding: 12rem 0 6rem;
            position: relative;
            overflow: hidden;
        }
        
        .hero-content {
            display: flex;
            align-items: center;
            position: relative;
            z-index: 2;
        }
        
        .hero-text {
            flex: 1;
            padding-right: 2rem;
            animation: fadeInLeft 1s ease forwards;
        }
        
        .hero-image {
            flex: 1;
            display: flex;
            justify-content: center;
            align-items: center;
            animation: fadeInRight 1s ease forwards;
        }
        
        .teacher-placeholder {
            width: 300px;
            height: 300px;
            background: var(--light);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            border: 5px solid var(--primary);
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
            overflow: hidden;
            transition: transform 0.5s ease, box-shadow 0.5s ease;
        }
        
        .teacher-placeholder:hover {
            transform: scale(1.05);
            box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
        }
        
        .teacher-placeholder img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
            transition: transform 0.7s ease;
        }
        
        .teacher-placeholder:hover img {
            transform: scale(1.1);
        }
        
        .hero-bg-element {
            position: absolute;
            font-size: 15rem;
            opacity: 0.03;
            color: var(--primary);
            z-index: 1;
            animation: float 8s ease-in-out infinite;
        }
        
        .hero-bg-element:nth-child(1) {
            top: 20%;
            left: 10%;
            animation-delay: 0s;
        }
        
        .hero-bg-element:nth-child(2) {
            bottom: 20%;
            right: 10%;
            animation-delay: 2s;
        }
        
        .badge {
            display: inline-block;
            background: var(--accent);
            color: white;
            padding: 0.3rem 0.8rem;
            border-radius: 20px;
            font-size: 0.8rem;
            font-weight: 500;
            margin-right: 0.5rem;
            margin-bottom: 0.5rem;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .badge:hover {
            transform: translateY(-2px);
            box-shadow: 0 3px 8px rgba(0, 0, 0, 0.1);
        }
        
        /* About Section */
        .about {
            background: var(--light);
        }
        
        .about-content {
            display: flex;
            gap: 3rem;
            align-items: center;
        }
        
        .about-text {
            flex: 1;
        }
        
        .about-qualifications {
            flex: 1;
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .about-qualifications:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
        }
        
        .qualification-item {
            display: flex;
            margin-bottom: 1.5rem;
            padding: 0.8rem;
            border-radius: 6px;
            transition: background-color 0.3s ease;
        }
        
        .qualification-item:hover {
            background-color: var(--light);
        }
        
        .qualification-icon {
            width: 50px;
            height: 50px;
            background: var(--light);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-right: 1rem;
            flex-shrink: 0;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }
        
        .qualification-item:hover .qualification-icon {
            background-color: var(--primary);
            transform: scale(1.1);
        }
        
        .qualification-icon i {
            color: var(--primary);
            font-size: 1.2rem;
            transition: color 0.3s ease;
        }
        
        .qualification-item:hover .qualification-icon i {
            color: white;
        }
        
        /* Courses Section */
        .courses-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        .course-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            display: flex;
            flex-direction: column;
        }
        
        .course-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
        }
        
        .course-header {
            background: var(--primary);
            color: white;
            padding: 1.5rem;
            position: relative;
            overflow: hidden;
        }
        
        .course-header:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
            transform: translateX(-100%);
            transition: transform 0.5s ease;
        }
        
        .course-card:hover .course-header:before {
            transform: translateX(100%);
        }
        
        .course-body {
            padding: 1.5rem;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        
        /* 外层课程列表容器 */
.course-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-family: "Noto Sans SC", sans-serif;
}

/* 一级课程项样式 */
.course-list > li {
    position: relative;
    padding: 12px 15px;
    margin-bottom: 8px;
    background-color: #f8fafc;
    border-radius: 6px;
    transition: all 0.3s ease;
}

/* 一级课程项hover效果 */
.course-list > li:hover {
    background-color: #f1f5f9;
    transform: translateX(4px);
}

/* 二级课程列表容器 */
.course-list > li > ul {
    list-style: none;
    padding: 8px 0 0 25px;
    margin: 8px 0 0;
    border-left: 2px solid #e2e8f0;
}

/* 二级课程项样式 */
.course-list > li > ul > li {
    padding: 6px 0;
    margin-bottom: 4px;
}

/* 链接样式 */
.course-list a {
    color: #2563eb;
    text-decoration: none;
    padding: 2px 0;
    border-bottom: 1px solid transparent;
    transition: all 0.2s ease;
}

/* 链接hover效果 */
.course-list a:hover {
    color: #1d4ed8;
    border-bottom-color: #1d4ed8;
}

/* 可根据需要添加图标样式（若使用font-awesome） */
.course-list > li::before {
   
    color: #64748b;
    position: absolute;
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
}
        
        /* Achievements Section */
        .achievements {
            background: var(--light);
        }
        
        .achievements-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 2rem;
            text-align: center;
        }
        
        .achievement-card {
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            transition: transform 0.3s ease, box-shadow 0.3s ease;
            position: relative;
            overflow: hidden;
        }
        
        .achievement-card:before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 4px;
            background: var(--primary);
            transform: translateX(-100%);
            transition: transform 0.3s ease;
        }
        
        .achievement-card:hover:before {
            transform: translateX(0);
        }
        
        .achievement-card:hover {
            transform: translateY(-8px) scale(1.02);
            box-shadow: 0 12px 25px rgba(0, 0, 0, 0.08);
        }
        
        .achievement-icon {
            width: 70px;
            height: 70px;
            background: var(--light);
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin: 0 auto 1rem;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }
        
        .achievement-card:hover .achievement-icon {
            background-color: var(--primary);
            transform: rotate(10deg) scale(1.1);
        }
        
        .achievement-icon i {
            color: var(--accent);
            font-size: 1.8rem;
            transition: color 0.3s ease, transform 0.3s ease;
        }
        
        .achievement-card:hover .achievement-icon i {
            color: white;
            transform: rotate(-10deg);
        }
        
        .achievement-number {
            font-size: 1.8rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 0.5rem;
            transition: color 0.3s ease;
            line-height: 1.2;
        }
        
        .achievement-card:hover .achievement-number {
            color: var(--primary-dark);
        }
        
        .achievement-link {
            display: inline-flex;
            align-items: center;
            gap: 0.5rem;
            color: var(--primary);
            text-decoration: none;
            font-size: 0.9rem;
            font-weight: 500;
            margin-top: 1rem;
            padding: 0.5rem 1rem;
            border: 1px solid var(--primary);
            border-radius: 20px;
            transition: all 0.3s ease;
            opacity: 0;
            transform: translateY(10px);
        }
        
        .achievement-card:hover .achievement-link {
            opacity: 1;
            transform: translateY(0);
        }
        
        .achievement-link:hover {
            background: var(--primary);
            color: white;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }
        
        /* Testimonials Section */
        .testimonials-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
            gap: 2rem;
        }
        
        .testimonial-card {
            background: white;
            border-radius: 10px;
            padding: 2rem;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            position: relative;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .testimonial-card:before {
            content: """;
            position: absolute;
            top: -20px;
            left: 20px;
            font-size: 5rem;
            color: var(--light);
            font-family: Georgia, serif;
            z-index: 0;
            transition: color 0.3s ease;
        }
        
        .testimonial-card:hover:before {
            color: rgba(37, 99, 235, 0.1);
        }
        
        .testimonial-card:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
        }
        
        .testimonial-content {
            position: relative;
            z-index: 1;
        }
        
        .testimonial-author {
            display: flex;
            align-items: center;
            margin-top: 1.5rem;
        }
        
        .author-avatar {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            background: var(--light-gray);
            display: flex;
            justify-content: center;
            align-items: center;
            margin-right: 1rem;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }
        
        .testimonial-card:hover .author-avatar {
            background-color: var(--primary);
            transform: scale(1.1);
        }
        
        .author-avatar i {
            color: var(--gray);
            transition: color 0.3s ease;
        }
        
        .testimonial-card:hover .author-avatar i {
            color: white;
        }
        
        /* Contact Section */
        .contact {
            background: var(--light);
        }
        
        .contact-wrapper {
            display: flex;
            gap: 3rem;
        }
        
        .contact-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 2rem;
            width: 100%;
        }
        
        .contact-info {
            flex: 1;
        }
        
        .contact-form {
            flex: 1;
            background: white;
            padding: 2rem;
            border-radius: 10px;
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
            position: relative;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }
        
        .contact-form:hover {
            transform: translateY(-5px);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.08);
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            padding: 1.5rem;
            border-radius: 12px;
            background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
            border: 1px solid #e2e8f0;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            position: relative;
            overflow: hidden;
        }
        
        .contact-item::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: linear-gradient(45deg, var(--primary), var(--secondary), var(--accent));
            opacity: 0;
            transition: opacity 0.4s ease;
            z-index: 0;
        }
        
        .contact-item:hover {
            transform: translateY(-3px);
            box-shadow: 
                0 20px 40px rgba(0, 0, 0, 0.08),
                0 8px 16px rgba(37, 99, 235, 0.1);
            border-color: var(--primary);
        }
        
        .contact-item:hover::before {
            opacity: 0.05;
        }
        
        .contact-icon {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            border-radius: 50%;
            display: flex;
            justify-content: center;
            align-items: center;
            margin-right: 1rem;
            flex-shrink: 0;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
            position: relative;
            z-index: 1;
        }
        
        .contact-item:hover .contact-icon {
            transform: rotate(15deg) scale(1.1);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
        }
        
        .contact-icon i {
            color: white;
            font-size: 1.4rem;
            transition: all 0.4s ease;
        }
        
        .contact-item:hover .contact-icon i {
            transform: scale(1.1);
        }
        
        .contact-item > div:last-child {
            position: relative;
            z-index: 1;
        }
        
        .contact-item h4 {
            color: var(--dark);
            margin-bottom: 0.5rem;
            font-weight: 600;
        }
        
        .contact-item p {
            color: var(--gray);
            margin: 0;
            line-height: 1.5;
        }
        
        /* 微信联系特殊样式 */
        .wechat-contact {
            display: flex;
            justify-content: flex-start;
            align-items: center;
            gap: 2rem;
            background: linear-gradient(135deg, #f8fafc 0%, #e0f2fe 100%);
            border: 1px solid #e2e8f0;
            padding: 1.5rem;
            border-radius: 12px;
            margin-bottom: 2rem;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
        }
        
        .wechat-contact:hover {
            transform: translateY(-3px);
            box-shadow: 
                0 20px 40px rgba(0, 0, 0, 0.08),
                0 8px 16px rgba(37, 99, 235, 0.1);
        }
        
        .wechat-contact .contact-info {
            display: flex;
            align-items: center;
            flex-shrink: 0;
        }
        
        .wechat-contact .contact-icon {
            background: linear-gradient(135deg, #10b981 0%, #059669 100%);
            margin-right: 1rem;
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
        }
        
        .wechat-contact .contact-icon i {
            color: white;
            font-size: 1.4rem;
        }
        
        .wechat-contact:hover .contact-icon {
            transform: rotate(15deg) scale(1.1);
            box-shadow: 0 6px 20px rgba(16, 185, 129, 0.4);
        }
        
        .wechat-qr {
            position: relative;
            transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
            flex-shrink: 0 !important;
        }
        
        .wechat-qr img {
            width: 120px;
            height: 120px;
            border-radius: 16px;
            box-shadow: 
                0 8px 25px rgba(0, 0, 0, 0.15),
                0 4px 10px rgba(0, 0, 0, 0.1);
            transition: all 0.4s ease;
            border: 3px solid white;
        }
        
        .wechat-qr:hover img {
            transform: scale(1.1) rotate(2deg);
            box-shadow: 
                0 15px 35px rgba(0, 0, 0, 0.2),
                0 8px 20px rgba(37, 99, 235, 0.15);
        }
        
        .wechat-qr::before {
            content: '';
            position: absolute;
            top: -3px;
            left: -3px;
            right: -3px;
            bottom: -3px;
            background: linear-gradient(45deg, #10b981, #059669, #047857);
            border-radius: 18px;
            z-index: -1;
            opacity: 0;
            transition: opacity 0.4s ease;
        }
        
        .wechat-qr:hover::before {
            opacity: 1;
        }
        
        .form-group {
            margin-bottom: 1.5rem;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 0.5rem;
            font-weight: 500;
            color: var(--dark);
        }
        
        .form-group input,
        .form-group textarea,
        .form-group select {
            width: 100%;
            padding: 0.8rem;
            border: 1px solid #ddd;
            border-radius: 4px;
            font-family: inherit;
            transition: border-color 0.3s ease, box-shadow 0.3s ease;
        }
        
        .form-group input:focus,
        .form-group textarea:focus,
        .form-group select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }
        
        .form-group textarea {
            height: 150px;
            resize: vertical;
        }
        
        /* Footer */
        footer {
            background: var(--dark);
            color: white;
            padding: 3rem 0;
        }
        
        .footer-content {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 2rem;
        }
        
        .footer-column {
            flex: 1;
            min-width: 250px;
        }
        
        .footer-column h3 {
            position: relative;
            padding-bottom: 0.8rem;
            margin-bottom: 1.5rem;
            color: white;
        }
        
        .footer-column h3:after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 40px;
            height: 3px;
            background: var(--accent);
        }
        
        .footer-links {
            list-style: none;
        }
        
        .footer-links li {
            margin-bottom: 0.8rem;
        }
        
        .footer-links a {
            color: #cbd5e1;
            text-decoration: none;
            transition: color 0.3s ease, padding-left 0.3s ease;
            display: inline-block;
        }
        
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 5px;
        }
        
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }
        
        .social-link {
            display: flex;
            justify-content: center;
            align-items: center;
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            color: white;
            transition: all 0.3s;
        }
        
        .social-link:hover {
            background: var(--primary);
            transform: translateY(-3px) rotate(15deg);
        }
        
        .copyright {
            text-align: center;
            padding-top: 2rem;
            margin-top: 2rem;
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            color: #94a3b8;
        }
        
        /* Animations */
        @keyframes fadeInLeft {
            from {
                opacity: 0;
                transform: translateX(-30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }
        
        @keyframes fadeInRight {
            from {
                opacity: 0;
                transform: translateX(30px);
            }
            to {
                opacity: 1;
                transform: translateX(0);
            }
        }
        
        @keyframes float {
            0% {
                transform: translateY(0px);
            }
            50% {
                transform: translateY(-20px);
            }
            100% {
                transform: translateY(0px);
            }
        }
        
        /* Responsive Styles */
        @media (max-width: 992px) {
            .hero-content {
                flex-direction: column;
                text-align: center;
            }
            
            .hero-text {
                padding-right: 0;
                margin-bottom: 2rem;
            }
            
            .about-content {
                flex-direction: column;
            }
            
            .contact-wrapper {
                flex-direction: column;
            }
        }
        
        @media (max-width: 768px) {
            .nav-links {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                width: 100%;
                background: white;
                flex-direction: column;
                padding: 1rem 0;
                box-shadow: 0 5px 10px rgba(0, 0, 0, 0.1);
            }
            
            .nav-links.active {
                display: flex;
                animation: fadeIn 0.5s ease forwards;
            }
            
            @keyframes fadeIn {
                from {
                    opacity: 0;
                    transform: translateY(-10px);
                }
                to {
                    opacity: 1;
                    transform: translateY(0);
                }
            }
            
            .nav-links li {
                margin: 0;
                padding: 0.8rem 1.5rem;
                border-bottom: 1px solid var(--light-gray);
            }
            
            .nav-links li:last-child {
                border-bottom: none;
            }
            
            .mobile-toggle {
                display: block;
            }
            
            h1 {
                font-size: 2rem;
            }
            
            h2 {
                font-size: 1.8rem;
            }
            
            .section {
                padding: 3rem 0;
            }
            
            .achievements-grid {
                grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
            }
        }