/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-logo {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: #8B4513;
}

.nav-logo i {
    margin-right: 0.5rem;
    font-size: 2rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a:hover {
    color: #8B4513;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #8B4513;
    transition: width 0.3s ease;
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: #333;
    margin: 3px 0;
    transition: 0.3s;
}

/* 首页横幅 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.hero-bg-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(139, 69, 19, 0.3) 0%, rgba(160, 82, 45, 0.4) 50%, rgba(0, 0, 0, 0.6) 100%);
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 800px;
    padding: 2rem;
    color: white;
}

.hero h1 {
    font-size: 4.5rem;
    font-weight: 700;
    color: white;
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease;
    text-shadow: 2px 2px 8px rgba(0, 0, 0, 0.5);
    letter-spacing: 2px;
}

.hero p {
    font-size: 1.4rem;
    color: rgba(255, 255, 255, 0.95);
    margin-bottom: 2.5rem;
    animation: fadeInUp 1s ease 0.2s both;
    line-height: 1.6;
    text-shadow: 1px 1px 4px rgba(0, 0, 0, 0.5);
}

.hero-buttons {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    animation: fadeInUp 1s ease 0.4s both;
}

.btn {
    padding: 18px 40px;
    border: none;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
    font-size: 1.2rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.btn-primary {
    background: #8B4513;
    color: white;
    box-shadow: 0 4px 15px rgba(139, 69, 19, 0.4);
}

.btn-primary:hover {
    background: #A0522D;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(139, 69, 19, 0.6);
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(255, 255, 255, 0.2);
}



/* 关于我们 */
.about {
    padding: 5rem 0;
    background: white;
    text-align: center;
}

.about h2 {
    font-size: 2.5rem;
    color: #8B4513;
    margin-bottom: 2rem;
}

.about p {
    font-size: 1.1rem;
    color: #666;
    max-width: 800px;
    margin: 0 auto;
    line-height: 1.8;
}

/* 商品展示 */
.products {
    padding: 5rem 0;
    background: #f8f9fa;
}

.products h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #8B4513;
    margin-bottom: 3rem;
}

.product-category {
    margin-bottom: 4rem;
}

.category-header {
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 2rem;
    gap: 1rem;
}

.category-header i {
    font-size: 2rem;
    color: #8B4513;
}

.category-header h3 {
    font-size: 1.8rem;
    color: #333;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.product-card {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
    text-align: center;
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.product-icon {
    font-size: 3rem;
    color: #8B4513;
    margin-bottom: 1rem;
}

.product-card h4 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 1rem;
}

.product-card p {
    color: #666;
    line-height: 1.6;
}

/* 乐谱区域 */
.scores {
    padding: 5rem 0;
    background: white;
}

.scores h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #8B4513;
    margin-bottom: 3rem;
}

.scores-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
    align-items: center;
}

.scores-text p {
    font-size: 1.1rem;
    color: #666;
    margin-bottom: 2rem;
    line-height: 1.8;
}

.difficulty-levels {
    display: flex;
    gap: 1rem;
    margin: 2rem 0;
    flex-wrap: wrap;
}

.level {
    text-align: center;
    flex: 1;
    min-width: 120px;
}

.level-badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 25px;
    color: white;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.level-badge.beginner {
    background: #28a745;
}

.level-badge.intermediate {
    background: #ffc107;
    color: #333;
}

.level-badge.advanced {
    background: #dc3545;
}

.level p {
    font-size: 0.9rem;
    color: #666;
}

.scores-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.music-sheet {
    position: relative;
    width: 200px;
    height: 300px;
    background: #f8f9fa;
    border: 2px solid #ddd;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.music-sheet i {
    font-size: 3rem;
    color: #8B4513;
    margin-bottom: 1rem;
}

.sheet-lines {
    width: 80%;
    height: 60%;
    background: repeating-linear-gradient(
        to bottom,
        transparent,
        transparent 20px,
        #ddd 20px,
        #ddd 22px
    );
}

/* 课程链接 */
.courses {
    padding: 5rem 0;
    background: #f8f9fa;
}

.courses h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #8B4513;
    margin-bottom: 3rem;
}

.courses-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 2rem;
}

.course-card {
    background: white;
    padding: 2.5rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.course-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.course-icon {
    font-size: 3rem;
    color: #8B4513;
    margin-bottom: 1.5rem;
    text-align: center;
}

.course-card h3 {
    font-size: 1.5rem;
    color: #333;
    margin-bottom: 1rem;
    text-align: center;
}

.course-card p {
    color: #666;
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.course-card ul {
    list-style: none;
    margin-bottom: 2rem;
}

.course-card li {
    color: #666;
    margin-bottom: 0.5rem;
    padding-left: 1.5rem;
    position: relative;
}

.course-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #28a745;
    font-weight: bold;
}

.course-card .btn {
    width: 100%;
}

/* 竖琴活动 */
.events {
    padding: 5rem 0;
    background: white;
}

.events h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #8B4513;
    margin-bottom: 3rem;
}

.events-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.event-card {
    background: #f8f9fa;
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.event-card:hover {
    border-color: #8B4513;
    transform: translateY(-5px);
}

.event-icon {
    font-size: 3rem;
    color: #8B4513;
    margin-bottom: 1.5rem;
}

.event-card h3 {
    font-size: 1.3rem;
    color: #333;
    margin-bottom: 1rem;
}

.event-card p {
    color: #666;
    line-height: 1.6;
}

/* 联系我们 */
.contact {
    padding: 5rem 0;
    background: #f8f9fa;
}

.contact h2 {
    text-align: center;
    font-size: 2.5rem;
    color: #8B4513;
    margin-bottom: 3rem;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border-radius: 10px;
    box-shadow: 0 3px 15px rgba(0, 0, 0, 0.1);
}

.contact-item i {
    font-size: 2rem;
    color: #8B4513;
}

.contact-item h4 {
    color: #333;
    margin-bottom: 0.5rem;
}

.contact-item p {
    color: #666;
}

.contact-form {
    background: white;
    padding: 2rem;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 2px solid #ddd;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #8B4513;
}

.contact-form .btn {
    width: 100%;
    padding: 15px;
    font-size: 1.1rem;
}

/* 页脚 */
.footer {
    background: #333;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-section h3,
.footer-section h4 {
    color: #8B4513;
    margin-bottom: 1rem;
}

.footer-section p {
    color: #ccc;
    margin-bottom: 0.5rem;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 0.5rem;
}

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #8B4513;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #555;
    color: #ccc;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: white;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 100px;
    }
    
    .hero-content {
        text-align: center;
        padding: 2rem;
        max-width: 100%;
    }
    
    .hero h1 {
        font-size: 2.5rem;
        letter-spacing: 1px;
    }
    
    .hero p {
        font-size: 1.2rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 1rem;
    }
    
    .btn {
        padding: 15px 30px;
        font-size: 1rem;
    }
    
    .scores-content {
        grid-template-columns: 1fr;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .difficulty-levels {
        flex-direction: column;
    }
    
    .level {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero p {
        font-size: 1rem;
    }
    

    
    .product-grid,
    .courses-grid,
    .events-grid {
        grid-template-columns: 1fr;
    }
}