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

body {
    font-family: "Microsoft YaHei", "SimSun", sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f5f0;
}

/* 导航栏样式 */
.main-nav {
    background: linear-gradient(to right, #8b0000, #a52a2a);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.main-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

.main-nav a {
    color: #fff;
    text-decoration: none;
    padding: 0.5rem 1rem;
    margin: 0 0.5rem;
    border-radius: 4px;
    transition: background-color 0.3s;
}

.main-nav a:hover,
.main-nav a.active {
    background-color: rgba(255,255,255,0.2);
}

/* 英雄区域样式 */
.hero {
    position: relative;
    height: 60vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.hero img {
    position: absolute;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.hero h1 {
    color: #fff;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
    font-size: 3rem;
    text-align: center;
    padding: 2rem;
    background: rgba(0,0,0,0.4);
    border-radius: 8px;
}

/* 主要内容区域样式 */
main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

section {
    margin-bottom: 4rem;
}

h2 {
    color: #8b0000;
    text-align: center;
    margin-bottom: 2rem;
    font-size: 2rem;
}

/* 特色网格样式 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature {
    text-align: center;
    padding: 1rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

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

.feature img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.feature h3 {
    color: #8b0000;
    margin-bottom: 0.5rem;
}

/* 视频容器样式 */
.video-container {
    position: relative;
    padding-bottom: 56.25%;
    height: 0;
    overflow: hidden;
    max-width: 100%;
}

.video-container video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* 页脚样式 */
footer {
    background: #333;
    color: #fff;
    text-align: center;
    padding: 2rem;
    margin-top: 4rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-nav ul {
        flex-direction: column;
        align-items: center;
    }

    .main-nav a {
        display: block;
        margin: 0.5rem 0;
    }

    .hero h1 {
        font-size: 2rem;
        padding: 1rem;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.intro, .feature {
    animation: fadeIn 1s ease-out;
}

/* 课程卡片样式 */
.course-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.course-card {
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
    overflow: hidden;
    transition: transform 0.3s;
}

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

.course-card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
}

.course-info {
    padding: 1.5rem;
}

.course-info h3 {
    color: #8b0000;
    margin-bottom: 1rem;
}

.course-info ul {
    list-style: none;
    margin: 1rem 0;
}

.course-info li {
    margin: 0.5rem 0;
    color: #666;
}

.book-btn {
    background: #8b0000;
    color: #fff;
    border: none;
    padding: 0.8rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    transition: background-color 0.3s;
}

.book-btn:hover {
    background: #a52a2a;
}

/* 特色体验样式 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

.feature-item img {
    width: 100%;
    height: 150px;
    object-fit: cover;
    border-radius: 4px;
    margin-bottom: 1rem;
}

.feature-item h3 {
    color: #8b0000;
    margin-bottom: 0.5rem;
}

/* 预约表单样式 */
.contact-form {
    max-width: 600px;
    margin: 2rem auto;
    padding: 2rem;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 1px solid #ddd;
    border-radius: 4px;
    font-size: 1rem;
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.submit-btn {
    background: #8b0000;
    color: #fff;
    border: none;
    padding: 1rem 2rem;
    border-radius: 4px;
    cursor: pointer;
    width: 100%;
    font-size: 1.1rem;
    transition: background-color 0.3s;
}

.submit-btn:hover {
    background: #a52a2a;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .course-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }

    .contact-form {
        padding: 1rem;
    }
}