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

body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background: linear-gradient(135deg, #f0f8ff 0%, #fff0f5 100%);
}

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

/* Hero Section */
.hero {
    background: url('https://gluz-oss.oss-cn-beijing.aliyuncs.com/luna/english.png') center center/cover no-repeat;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-content {
    z-index: 2;
    position: relative;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.3);
    margin-bottom: 1rem;
    animation: fadeInUp 1s ease-out;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 500;
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    margin-bottom: 1.5rem;
    animation: fadeInUp 1s ease-out 0.2s both;
}

.hero-description {
    font-size: 1.2rem;
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease-out 0.4s both;
}

.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.star {
    position: absolute;
    font-size: 2rem;
    animation: float 6s ease-in-out infinite;
}

.star-1 { top: 20%; left: 10%; animation-delay: 0s; }
.star-2 { top: 30%; right: 15%; animation-delay: 1s; }
.star-3 { bottom: 30%; left: 20%; animation-delay: 2s; }
.star-4 { bottom: 20%; right: 10%; animation-delay: 3s; }

/* 按钮样式 */
.cta-button {
    padding: 15px 30px;
    font-size: 1.1rem;
    font-weight: 600;
    border: none;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
    animation: fadeInUp 1s ease-out 0.6s both;
}

.cta-button.primary {
    background: linear-gradient(45deg, #ff6b6b, #ffd93d);
    color: #fff;
    box-shadow: 0 8px 25px rgba(255, 107, 107, 0.4);
}

.cta-button.secondary {
    background: linear-gradient(45deg, #4ecdc4, #44a08d);
    color: #fff;
    box-shadow: 0 8px 25px rgba(78, 205, 196, 0.4);
}

.cta-button:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 35px rgba(0,0,0,0.2);
}

/* 滚动指示器样式 */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 0;
    right: 0;
    text-align: center;
    color: #fff;
    animation: fadeInUp 1s ease-out 0.8s both;
}

.scroll-arrow {
    font-size: 3rem;
    margin-bottom: 10px;
    animation: bounce 2s infinite;
    display: block;
    text-align: center;
}

.scroll-text {
    font-size: 0.9rem;
    opacity: 0.8;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    display: block;
}

/* Section 通用样式 */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: #2c3e50;
    margin-bottom: 3rem;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(45deg, #ff6b6b, #ffd93d);
    border-radius: 2px;
}

/* 课程优势 Section */
.advantages {
    background: #fff;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 3rem;
}

.advantage-card {
    background: #fff;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
    border-color: #ffd93d;
}

.advantage-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.advantage-card h3 {
    font-size: 1.3rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 1rem;
}

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

/* 课程体系 Section */
.curriculum {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.curriculum-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 3rem;
}

.curriculum-card {
    background: #fff;
    padding: 30px;
    border-radius: 20px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    position: relative;
    transition: all 0.3s ease;
    border-left: 5px solid;
}

.curriculum-card.beginner {
    border-left-color: #ff6b6b;
}

.curriculum-card.intermediate {
    border-left-color: #4ecdc4;
}

.curriculum-card.advanced {
    border-left-color: #ffd93d;
}

.curriculum-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.level-badge {
    position: absolute;
    top: -15px;
    right: 20px;
    background: linear-gradient(45deg, #ff6b6b, #ffd93d);
    color: #fff;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 600;
}

.curriculum-card h3 {
    font-size: 1.2rem;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 0.5rem;
}

.curriculum-card .subtitle {
    color: #666;
    font-style: italic;
    margin-bottom: 1rem;
}

.curriculum-details p {
    margin: 0.5rem 0;
    color: #555;
}

/* 教师介绍 Section */
.teacher {
    background: #fff;
}

.teacher-profile {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 40px;
    align-items: center;
    margin-top: 3rem;
}

.teacher-photo {
    text-align: center;
}

.photo-placeholder {
    width: 200px;
    height: 200px;
    background: linear-gradient(135deg, #87ceeb, #ffb6c1);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    margin: 0 auto;
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

.photo-placeholder span {
    font-size: 4rem;
    margin-bottom: 0.5rem;
}

.photo-placeholder p {
    color: #fff;
    font-weight: 600;
    font-size: 1.1rem;
}

.teacher-info h3 {
    font-size: 1.8rem;
    color: #2c3e50;
    margin-bottom: 1rem;
}

.experience-badge {
    display: inline-block;
    background: linear-gradient(45deg, #ff6b6b, #ffd93d);
    color: #fff;
    padding: 8px 20px;
    border-radius: 25px;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

.background h4, .teaching-style h4 {
    color: #2c3e50;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.background ul {
    list-style: none;
    margin-bottom: 1.5rem;
}

.background li {
    padding: 0.3rem 0;
    color: #555;
    position: relative;
    padding-left: 20px;
}

.background li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4ecdc4;
    font-weight: bold;
}

.teaching-style p {
    color: #555;
    line-height: 1.6;
}

/* 课堂精彩瞬间 Section */
.classroom-moments {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.moments-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 3rem;
}

.moment-card {
    background: #fff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 320px;
    display: flex;
    flex-direction: column;
}

.moment-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0,0,0,0.15);
}

.image-placeholder, .video-placeholder {
    height: 200px;
    background: linear-gradient(135deg, #87ceeb, #ffb6c1);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.classroom-video {
    width: 100%;
    height: 200px;
    object-fit: contain;
    border-radius: 20px 20px 0 0;
    background: #000;
}

.image-placeholder span, .video-placeholder span {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.image-placeholder p, .video-placeholder p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.moment-card p {
    padding: 20px;
    text-align: center;
    color: #2c3e50;
    font-weight: 500;
    margin: 0;
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, #87ceeb 0%, #ffb6c1 100%);
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    color: #fff;
    margin-bottom: 1.5rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
}

.cta-content p {
    font-size: 1.2rem;
    color: #fff;
    margin-bottom: 2rem;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.3);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Footer */
.footer {
    background: #2c3e50;
    color: #fff;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 40px;
    align-items: start;
}

.contact-info h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: #ffd93d;
}

.contact-item {
    display: flex;
    align-items: center;
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.contact-item .icon {
    font-size: 1.5rem;
    margin-right: 15px;
    color: #ffd93d;
}

/* 二维码样式 */
.qr-code {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 15px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.qr-code h4 {
    color: #ffd93d;
    margin-bottom: 15px;
    font-size: 1.1rem;
}

.qr-image img {
    width: 120px;
    height: 120px;
    border-radius: 10px;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #34495e;
    color: #bdc3c7;
    grid-column: 1 / -1;
}

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

@keyframes float {
    0%, 100% {
        transform: translateY(0px);
    }
    50% {
        transform: translateY(-20px);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateY(0);
    }
    40% {
        transform: translateY(-10px);
    }
    60% {
        transform: translateY(-5px);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .scroll-indicator {
        bottom: 20px;
    }
    
    .scroll-arrow {
        font-size: 1.5rem;
    }
    
    .scroll-text {
        font-size: 0.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .teacher-profile {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .photo-placeholder {
        width: 150px;
        height: 150px;
    }
    
    .photo-placeholder span {
        font-size: 3rem;
    }
    
    .advantages-grid,
    .curriculum-grid,
    .moments-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .qr-code {
        margin: 0 auto;
        max-width: 200px;
    }
    
    .container {
        padding: 0 15px;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .cta-button {
        padding: 12px 24px;
        font-size: 1rem;
    }
    
    .advantage-card,
    .curriculum-card {
        padding: 20px;
    }
}