/* 四季瑜舍 - 统一样式 */
:root {
    --primary: #7CA982;
    --primary-light: #9BC4A7;
    --primary-dark: #5A8A62;
    --white: #FFFFFF;
    --gray-light: #F5F5F5;
    --gray: #666666;
    --gray-dark: #333333;
    --orange: #E89E64;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --transition: all 0.3s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'PingFang SC', -apple-system, sans-serif;
    color: var(--gray-dark);
    line-height: 1.6;
    background: var(--white);
}

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

/* 导航栏 */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    padding: 15px 0;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 30px;
    list-style: none;
}

.nav-links a {
    color: var(--gray-dark);
    text-decoration: none;
    font-size: 16px;
    transition: var(--transition);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}

/* 通用区块 */
section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    font-size: 32px;
    color: var(--gray-dark);
    margin-bottom: 15px;
}

.section-subtitle {
    text-align: center;
    color: var(--gray);
    margin-bottom: 50px;
    font-size: 16px;
}

/* Banner 区 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, rgba(124, 169, 130, 0.9), rgba(124, 169, 130, 0.7)),
                url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>');
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: var(--white);
    padding-top: 60px;
}

.hero h1 {
    font-size: 56px;
    margin-bottom: 20px;
    letter-spacing: 4px;
}

.hero .slogan {
    font-size: 24px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.btn {
    display: inline-block;
    padding: 15px 40px;
    background: var(--orange);
    color: var(--white);
    text-decoration: none;
    border-radius: 30px;
    font-size: 16px;
    transition: var(--transition);
}

.btn:hover {
    background: #d88a4e;
    transform: translateY(-2px);
}

/* 卡片 */
.card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 30px rgba(0,0,0,0.12);
}

.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.card img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-radius: 8px;
    margin-bottom: 20px;
    background: var(--gray-light);
}

.card h3 {
    color: var(--primary);
    margin-bottom: 10px;
    font-size: 20px;
}

.card p {
    color: var(--gray);
    font-size: 14px;
}

/* 师资卡片 */
.teacher-card {
    text-align: center;
}

.teacher-card img {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    margin: 0 auto 20px;
    object-fit: cover;
}

.teacher-card .title {
    color: var(--primary);
    font-size: 14px;
    margin-bottom: 5px;
}

.teacher-card .tags {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 10px;
    flex-wrap: wrap;
}

.teacher-card .tag {
    background: var(--gray-light);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 12px;
    color: var(--gray);
}

/* 表单 */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 20px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
}

/* 联系信息 */
.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
    text-align: center;
}

.contact-item {
    padding: 30px;
    background: var(--gray-light);
    border-radius: 12px;
}

.contact-item h4 {
    color: var(--primary);
    margin-bottom: 10px;
}

.contact-item p {
    color: var(--gray);
}

/* 页脚 */
footer {
    background: var(--gray-dark);
    color: var(--white);
    padding: 30px 0;
    text-align: center;
}

footer p {
    opacity: 0.7;
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .nav-links {
        gap: 20px;
    }
    
    .hero h1 {
        font-size: 36px;
    }
    
    .hero .slogan {
        font-size: 18px;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 24px;
    }
}

/* 返回顶部 */
.back-home {
    display: inline-block;
    margin-top: 40px;
    color: var(--primary);
    text-decoration: none;
}

.back-home:hover {
    text-decoration: underline;
}

/* 关于页特色 */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 40px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
    background: var(--gray-light);
    border-radius: 12px;
}

.feature-item .icon {
    font-size: 40px;
    margin-bottom: 15px;
}

.feature-item h4 {
    color: var(--primary);
    margin-bottom: 10px;
}

/* 课程标签 */
.course-tabs {
    display: flex;
    justify-content: center;
    gap: 15px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.course-tab {
    padding: 10px 25px;
    background: var(--gray-light);
    border: none;
    border-radius: 25px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
}

.course-tab.active,
.course-tab:hover {
    background: var(--primary);
    color: var(--white);
}

/* 价格卡片 */
.price-card {
    text-align: center;
    padding: 40px 30px;
}

.price-card .price {
    font-size: 36px;
    color: var(--primary);
    font-weight: bold;
    margin: 20px 0;
}

.price-card .price span {
    font-size: 16px;
    color: var(--gray);
}

.price-card ul {
    list-style: none;
    margin-bottom: 20px;
}

.price-card li {
    padding: 8px 0;
    color: var(--gray);
    border-bottom: 1px solid #eee;
}

.price-card li:last-child {
    border-bottom: none;
}