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

body {
    font-family: 'Microsoft YaHei', 'SimHei', sans-serif;
    background-color: #f5f5f5;
    color: #333;
    line-height: 1.6;
}

/* 顶部导航栏 */
.top-nav {
    background-color: #fff;
    border-bottom: 1px solid #e5e5e5;
    padding: 10px 0;
}

.top-nav-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.stats-info {
    display: flex;
    gap: 20px;
    font-size: 14px;
    color: #666;
    flex-wrap: wrap;
}

.stats-info span {
    color: #ff6600;
    font-weight: bold;
}

.contact-info {
    display: flex;
    gap: 15px;
    align-items: center;
    font-size: 14px;
}

.contact-info a {
    color: #333;
    text-decoration: none;
}

.contact-info a:hover {
    color: #ff6600;
}

/* 主导航栏 */
.main-nav {
    background-color: #fff;
    border-bottom: 2px solid #ff6600;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #ff6600;
    padding: 15px 0;
}

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

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: #333;
    text-decoration: none;
    padding: 15px 0;
    display: block;
    font-size: 16px;
    transition: color 0.3s;
}

.nav-menu a:hover,
.nav-menu a.active {
    color: #ff6600;
}

.nav-menu .dropdown {
    position: relative;
}

.dropdown-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
    min-width: 150px;
    z-index: 100;
    padding: 10px 0;
}

.dropdown:hover .dropdown-menu {
    display: block;
}

.dropdown-menu a {
    padding: 10px 20px;
    display: block;
}

.user-actions {
    display: flex;
    gap: 15px;
    align-items: center;
}

.user-actions a {
    color: #333;
    text-decoration: none;
    font-size: 14px;
}

.user-actions a:hover {
    color: #ff6600;
}

.search-icon {
    font-size: 20px;
    cursor: pointer;
}

/* 面包屑导航 */
.breadcrumb {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    background-color: #fff;
    border-bottom: 1px solid #e5e5e5;
}

.breadcrumb a {
    color: #666;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: #ff6600;
}

.breadcrumb span {
    margin: 0 5px;
    color: #ccc;
}

/* 主内容区 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    /* padding: 20px; */
}

/* 筛选区域 */
.filter-section {
    background-color: #fff;
    padding: 25px;
    border-radius: 8px;
    margin-bottom: 20px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.filter-row {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    flex-wrap: wrap;
    gap: 10px;
}

.filter-row:last-child {
    margin-bottom: 0;
}

.filter-label {
    font-weight: bold;
    color: #333;
    min-width: 60px;
}

.filter-options {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    flex: 1;
}

.filter-option {
    padding: 6px 15px;
    border: 1px solid #ddd;
    border-radius: 4px;
    background-color: #fff;
    color: #666;
    text-decoration: none;
    font-size: 14px;
    transition: all 0.3s;
    cursor: pointer;
    display: inline-block;
}

.filter-option:hover {
    border-color: #ff6600;
    color: #ff6600;
}

.filter-option.active {
    background-color: #ff6600;
    color: #fff !important;
    border-color: #ff6600;
}

/* 结果头部 */
.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    flex-wrap: wrap;
    gap: 15px;
}

.results-count {
    font-size: 16px;
    color: #666;
}

.sort-options {
    display: flex;
    gap: 15px;
    align-items: center;
    flex-wrap: wrap;
}

.sort-label {
    color: #666;
    font-size: 14px;
}

.sort-option {
    color: #666;
    text-decoration: none;
    font-size: 14px;
    padding: 5px 10px;
    border-radius: 4px;
    transition: all 0.3s;
}

.sort-option:hover {
    color: #ff6600;
    background-color: #fff5f0;
}

.sort-option.active {
    color: #ff6600;
    font-weight: bold;
}

/* 讲师卡片网格 */
.teachers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 30px;
    align-items: start;
}

.teacher-card {
    background-color: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 8px;
    padding: 20px;
    transition: all 0.3s;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.teacher-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.teacher-top {
    display: flex;
    gap: 20px;
    align-items: flex-start;
    margin-bottom: 30px;
}

.teacher-avatar {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    border-radius: 50%;
    overflow: hidden;
    background-color: #f5f5f5;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid #fff5f0;
}

.teacher-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.teacher-avatar.logo {
    background: linear-gradient(135deg, #ff6600 0%, #ff8533 100%);
    color: #fff;
    font-size: 18px;
    font-weight: bold;
}

.teacher-info {
    flex: 1;
    min-width: 0;
}

.teacher-name-row {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 8px;
    flex-wrap: wrap;
}

.teacher-name {
    font-size: 20px;
    font-weight: bold;
    color: #333;
    margin: 0;
}

.teacher-title {
    display: inline-block;
    padding: 4px 12px;
    background-color: #fff5f0;
    color: #ff6600;
    border-radius: 4px;
    font-size: 14px;
    margin: 0;
}

.teacher-experience {
    color: #999;
    font-size: 14px;
    margin: 0;
}

.teacher-description {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
    text-align: justify;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-top: 0;
}

/* 页脚 */
.footer {
    background-color: #333;
    color: #fff;
    padding: 40px 0 20px;
    margin-top: 50px;
}

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

.footer-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h3 {
    margin-bottom: 15px;
    font-size: 16px;
}

.footer-section p,
.footer-section a {
    color: #ccc;
    text-decoration: none;
    font-size: 14px;
    line-height: 2;
}

.footer-section a:hover {
    color: #ff6600;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #555;
    color: #999;
    font-size: 12px;
}

.footer-bottom a {
    color: #999;
    text-decoration: none;
}

.footer-bottom a:hover {
    color: #ff6600;
}

/* 浮动按钮 */
.float-buttons {
    position: fixed;
    right: 20px;
    bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 1000;
}

.float-btn {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #ff6600;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
    transition: all 0.3s;
    text-decoration: none;
    font-size: 20px;
}

.float-btn:hover {
    background-color: #ff8533;
    transform: scale(1.1);
}

/* 分页 */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
    padding: 20px 0;
    flex-wrap: wrap;
}

.page-btn {
    padding: 8px 16px;
    border: 1px solid #ddd;
    background-color: #fff;
    color: #666;
    text-decoration: none;
    border-radius: 4px;
    transition: all 0.3s;
    font-size: 14px;
    min-width: 40px;
    text-align: center;
}

.page-btn:hover {
    border-color: #ff6600;
    color: #ff6600;
    background-color: #fff5f0;
}

.page-btn.active {
    background-color: #ff6600;
    color: #fff;
    border-color: #ff6600;
}

.page-ellipsis {
    padding: 8px 4px;
    color: #999;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .teachers-grid {
        grid-template-columns: 1fr;
    }
    
    .teacher-avatar {
        width: 100px;
        height: 100px;
    }
    
    .filter-row {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .filter-label {
        margin-bottom: 10px;
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
    }
}