* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Microsoft YaHei', 'Segoe UI', sans-serif;
}

body {
    background-color: #F5F9FD;
    color: #333;
    line-height: 1.6;
}

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

/* 头部横幅 */
.header-banner {
    background: url('../images/header-bg.jpg') no-repeat center center;
    color: white;
    padding: 40px 20px;
    text-align: center;
    margin-bottom: 30px;
    box-shadow: 0 6px 20px rgba(26, 111, 252, 0.2);
}

.header-banner h1 {
    margin-top: 100px;
    font-size: 6rem;
    font-weight: 400;
    color: #1830D6;
    font-family: PangMenZhengDao;
}

.header-banner .subtitle {
    font-size: 1.4rem;
    margin-bottom: 25px;
    opacity: 0.95;
    color: #001184;
    font-family: SourceHanSansCN;
}

.header-banner .subtitle1 {
    width: 750px;
    height: 100px;
    line-height: 85px;
    color: #0825e0;
    font-size: 1.8rem;
    font-weight: 700;
    background: url('../images/tap1.png');
    background-size: cover;
    margin: 0 auto;
    margin-bottom: 25px;
}

.header-banner .highlight {
    color: #FFD700;
    font-weight: bold;
    font-size: 1.8rem;
}

.cta-button {
    display: inline-block;
    background-color: #ff9a02;
    color: white;
    padding: 18px 50px;
    font-size: 1.6rem;
    font-weight: bold;
    text-decoration: none;
    border-radius: 50px;
    border: rgba(255, 255, 255, 0.8) solid 5px;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(255, 109, 12, 0.4);
    margin-top: 90px;
    margin-bottom: 50px;
}

.cta-button:hover {
    background-color: #ff8800;
    transform: translateY(-3px);
    box-shadow: 0 6px 16px rgba(255, 107, 53, 0.6);
}

/* 核心亮点 */
.highlights-section {
    margin-bottom: 60px;
}

.section-title {
    text-align: center;
    font-size: 2.2rem;
    color: #2c79ff;
    margin-top: 40px;
    margin-bottom: 40px;
    padding-bottom: 15px;
    border-bottom: 3px solid #eaeaea;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: #FF6B35;
}

.highlights-grid {
    margin-top: 50px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.highlight-card {
    border-radius: 20px;
    padding: 30px;
    text-align: center;
    transition: transform 0.3s ease;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.highlight-card img {
    width: 100px;
    margin-bottom: 20px;
}

.bg-1 {
    background: #DFFCF9;
}

.bg-1-color {
    color: #1ABE9B;
}

.bg-1-tab {
    width: 100px;
    height: 8px;
    background: #1ABE9B;
    border-radius: 5px;
    margin: 20px auto;
}

.bg-2 {
    background: #E6F5FE;
}

.bg-2-color {
    color: #1DA4EB;
}

.bg-2-tab {
    width: 100px;
    height: 8px;
    background: #1DA4EB;
    border-radius: 5px;
    margin: 20px auto;
}

.bg-3 {
    background: #FFEFEC;
}

.bg-3-color {
    color: #F1613B;
}

.bg-3-tab {
    width: 100px;
    height: 8px;
    background: #F1613B;
    border-radius: 5px;
    margin: 20px auto;
}

.highlight-card p {
    text-align: left;
    margin-bottom: 50px;
}

.problems-section img {
    width: 100%;
    margin: 50px 0;
}

.highlight-card:hover {
    transform: translateY(-8px);
}

.highlight-card h3 {
    font-family: SourceHanSansCN;
    font-weight: bold;
    margin-bottom: 15px;
}

.highlight-card p {
    color: #555;
    font-size: 1rem;
}

/* 课程表 */
.live-section {
    background: url('../images/bg2.jpg');
}

.schedule-section {
    margin-bottom: 50px;
}

.schedule-table {
    width: 100%;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.schedule-table table {
    width: 100%;
    border-collapse: collapse;
}

.schedule-table thead {
    background-color: #2c79ff;
    color: white;
}

.schedule-table th {
    padding: 20px 15px;
    text-align: left;
    font-weight: 600;
}

.schedule-table tbody tr {
    border-bottom: 1px solid #eee;
    transition: background-color 0.2s;
}

.schedule-table tbody tr:nth-child(even) {
    background-color: #f9f9f9;
}

.schedule-table tbody tr:hover {
    background-color: #f0f7ff;
}

.schedule-table td {
    padding: 18px 15px;
    vertical-align: middle;
}

.btn_yuyue {
    background: #f7622c;
    color: white;
    border-radius: 5px;
    padding: 5px 15px;
    display: inline-block;
    text-decoration: none;
    opacity: 0.9;
}

.btn_yuyue:hover,
.btn_yuyue:visited,
.btn_yuyue:active {
    color: white;
    opacity: 1;
}

.btn_yuyue:link {
    color: white;
}

.btn_huifang {
    background: #3c9df8;
}

.btn_yiyuyue {
    background: #14bd98;
}

.btn_zhibo {
    background: #0084ff;
}

.session-number {
    display: inline-block;
    background-color: #eef5ff;
    color: #2c79ff;
    width: 36px;
    height: 36px;
    line-height: 36px;
    text-align: center;
    border-radius: 50%;
    font-weight: bold;
    margin-right: 10px;
}

/* 名师阵容 */
.teachers-section {
    margin-bottom: 50px;
}

.teacher-card {
    background: url('../images/teacher-bg.jpg') no-repeat center center;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    display: flex;
    align-items: center;
    gap: 30px;
    margin-bottom: 30px;
}

.teacher-avatar {
    flex-shrink: 0;
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background-color: #eaeaea;
    overflow: hidden;
    border: 5px solid #f0f7ff;
}

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

.teacher-info h4 {
    color: #2c79ff;
    font-size: 1.6rem;
    margin-bottom: 8px;
}

.teacher-title {
    color: #FF6B35;
    font-weight: 600;
    margin-bottom: 10px;
    font-size: 1.1rem;
}

.teacher-tags {
    margin-bottom: 15px;
}

.tag {
    display: inline-block;
    background-color: #eef5ff;
    color: #2c79ff;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 0.9rem;
    margin-right: 8px;
    margin-bottom: 5px;
}

.teacher-desc {
    color: #555;
    line-height: 1.7;
}

/* 服务须知 */
.notice-section {
    background: white;
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    margin-bottom: 40px;
}

.notice-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0px;
    margin-top: 25px;
}

.notice-item {
    border-top: #3F64E8 solid 1px;
    border-left: #3F64E8 solid 1px;
    border-bottom: #3F64E8 solid 1px;
}

.notice-item h5 {
    background-color: #3F64E8;
    color: #ffffff;
    text-align: center;
    margin-bottom: 10px;
    font-size: 1.2rem;
}

.notice-item p {
    color: #666;
    padding: 10px;
}

/* 页脚 */
.footer-bg {
    background: url('../images/footer.jpg') no-repeat center center;
}

.footer {
    text-align: center;
    padding: 25px;
    color: #ffffff;
    font-size: 0.9rem;
    border-top: 1px solid #eee;
    margin-top: 30px;
}

.footer p {
    color: #ffffff;
    font-size: 0.9rem;
}

.footer a {
    text-decoration: none;
}

/* 响应式 */
@media (max-width: 768px) {
    .header-banner h1 {
        font-size: 2rem;
    }

    .header-banner .subtitle {
        font-size: 1.1rem;
    }

    .cta-button {
        padding: 15px 35px;
        font-size: 1.1rem;
    }

    .teacher-card {
        flex-direction: column;
        text-align: center;
    }

    .schedule-table {
        font-size: 0.9rem;
    }

    .schedule-table th,
    .schedule-table td {
        padding: 12px 10px;
    }
}