:root {
    --primary-color: #007BFF;
    --secondary-color: #6c757d;
    --light-bg: #f8f9fa;
    --dark-text: #2c3e50;
    --border-color: #dee2e6;
    --success-color: #28a745;
    --product-bg: #fff;
    --product-hover: #f8f9fa;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
    position: relative;
}
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}
/* Header */
header {
    background: linear-gradient(135deg, #007BFF 0%, #0056b3 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    margin-top: 60px;
}
header h1 {
    font-size: 2.8rem;
    margin-bottom: 15px;
    font-weight: 300;
}
header p {
    font-size: 1.2rem;
    opacity: 0.9;
    max-width: 800px;
    margin: 0 auto;
}

/* Module Styles */
.module {
    padding: 30px 0;
    border-bottom: 1px solid var(--border-color);
}
.module:last-child {
    border-bottom: none;
}
.module-title {
    text-align: center;
    margin-bottom: 40px;
    color: var(--dark-text);
}
.module-title h2 {
    font-size: 2rem;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}
.module-title h2:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--primary-color);
}

/* Pain Points */
.pain-points {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}
.point-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 30px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}
.point-card:hover {
    transform: translateY(-5px);
}
.point-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.3rem;
}
.point-card p {
    color: #666;
    font-size: 1rem;
}

/* Solution Overview */
.solution-overview {
    background-color: var(--light-bg);
    text-align: center;
    padding: 50px 0;
}
.solution-items {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 30px;
}
.solution-item {
    background: white;
    padding: 20px;
    border-radius: 8px;
    min-width: 180px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}
.solution-item strong {
    color: var(--primary-color);
    display: block;
    margin-bottom: 5px;
}

/* CTA After Pain Points */
.cta-after-pain {
    text-align: center;
    margin: 40px 0;
    padding: 40px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}
.cta-after-pain h3 {
    color: var(--dark-text);
    font-size: 1.8rem;
    margin-bottom: 15px;
}
.cta-after-pain p {
    color: #555;
    font-size: 1.1rem;
    margin-bottom: 25px;
}
.wechat-cta {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}
.wechat-qr {
    width: 120px;
    height: 120px;
    background: #f0f0f0;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    color: #666;
}
.wechat-text {
    text-align: left;
}
.wechat-text h4 {
    color: var(--dark-text);
    margin-bottom: 5px;
}
.wechat-text p {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 10px;
}
.btn {
    display: inline-block;
    padding: 10px 25px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 1rem;
    text-decoration: none;
    transition: background 0.3s;
}
.btn:hover {
    background: #0056b3;
}
.btn-success {
    background: var(--success-color);
}
.btn-success:hover {
    background: #218838;
}

/* Comparison Table */
.comparison-table {
    overflow-x: auto;
    margin: 30px 0;
}
table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}
th, td {
    border: 1px solid var(--border-color);
    padding: 12px 15px;
    text-align: left;
}
th {
    background-color: var(--primary-color);
    color: white;
    font-weight: 600;
}
tr:nth-child(even) {
    background-color: #f9f9f9;
}

/* CTA After Comparison */
.cta-after-comparison {
    text-align: center;
    margin: 40px 0;
    padding: 50px;
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-radius: 12px;
}
.cta-after-comparison h3 {
    color: var(--dark-text);
    font-size: 1.8rem;
    margin-bottom: 15px;
}
.cta-after-comparison p {
    color: #555;
    font-size: 1.1rem;
    margin-bottom: 25px;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

/* Application Areas */
.application-areas {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}
.app-card {
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    background: white;
}
.app-card h3 {
    color: var(--primary-color);
    margin-bottom: 15px;
    font-size: 1.4rem;
}
.app-card .note {
    font-style: italic;
    color: #666;
    margin: 10px 0;
    padding: 10px;
    background: #f8f9fa;
    border-left: 3px solid var(--primary-color);
}

/* CTA After Applications */
.cta-after-applications {
    text-align: center;
    margin: 40px 0;
    padding: 40px;
    background: linear-gradient(135deg, #f3e5f5 0%, #e1bee7 100%);
    border-radius: 12px;
}
.cta-after-applications h3 {
    color: var(--dark-text);
    font-size: 1.8rem;
    margin-bottom: 15px;
}
.cta-after-applications p {
    color: #555;
    font-size: 1.1rem;
    margin-bottom: 25px;
}

/* Form Section */
.form-section {
    background-color: var(--light-bg);
    padding: 60px 0;
}
.form-container {
    max-width: 800px;
    margin: 0 auto;
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.1);
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--dark-text);
    font-weight: 500;
}
.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}
.form-submit {
    text-align: center;
    margin-top: 20px;
}

/* Products Section - E-commerce Style */
.products {
    text-align: center;
}
.products-title {
    margin-bottom: 30px;
}
.products-title h2 {
    font-size: 2rem;
    color: var(--dark-text);
}
.products-title p {
    color: #666;
    font-size: 1.1rem;
}
.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}
.product-card {
    background: var(--product-bg);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    height: 100%;
    display: flex;
    flex-direction: column;
}
.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.15);
    border-color: var(--primary-color);
}
.product-image {
    background: #f8f9fa;
    height: 180px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #666;
}
.product-content {
    padding: 20px;
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}
.product-title {
    font-size: 1.3rem;
    color: var(--dark-text);
    margin-bottom: 10px;
    font-weight: 500;
}
.product-desc {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 15px;
    flex-grow: 1;
}
.product-price {
    font-size: 1.4rem;
    font-weight: bold;
    color: var(--primary-color);
    margin-bottom: 15px;
}
.product-link {
    display: block;
    padding: 12px 0;
    background: var(--primary-color);
    color: white;
    text-align: center;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: background 0.3s;
}
.product-link:hover {
    background: #0056b3;
}
/* Tooltip */
.tooltip {
    position: absolute;
    bottom: 70px;
    right: 0;
    background: white;
    padding: 15px;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    width: 200px;
    display: none;
    z-index: 1001;
}
.tooltip:after {
    content: '';
    position: absolute;
    top: 100%;
    right: 20px;
    border: 8px solid transparent;
    border-top-color: white;
}
.tooltip img {
    width: 100%;
    border-radius: 5px;
}
.tooltip p {
    text-align: center;
    margin-top: 10px;
    font-size: 0.9rem;
    color: #555;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2.2rem;
    }
    .module {
        padding: 40px 0;
    }
    .wechat-cta {
        flex-direction: column;
        text-align: center;
    }
    .tooltip {
        right: 20px;
        width: 180px;
    }
}

/* 极致精简通栏表单样式 */
.form-section {
background-color: var(--light-bg);
padding: 40px 0; /* 更小的上下内边距 */
margin: 0;
width: 100vw;
position: relative;
left: 50%;
right: 50%;
margin-left: -50vw;
margin-right: -50vw;
}

.form-container-compact {
max-width: 1200px;
margin: 0 auto;
background: white;
border-radius: 8px;
box-shadow: 0 4px 12px rgba(0,0,0,0.08);
overflow: hidden;
padding:20px;
}

.form-row {
display: flex;
gap: 15px; /* 控件间间距 */
}

.form-row + .form-row {
margin-top: 15px; /* 行间距 */
}

.form-group {
flex: 1;
min-width: 0;
}

/* 输入框和下拉框统一风格 */
.form-group input,
.form-group select {
width: 100%;
padding: 14px 16px;
border: 1px solid var(--border-color);
border-radius: 5px;
font-size: 1rem;
/* 移除默认轮廓，使用更柔和的聚焦效果 */
outline: none;
}

.form-group input:focus,
.form-group select:focus {
border-color: var(--primary-color);
box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.2);
}

/* 下拉框的箭头样式（可选美化） */
.form-group select {
appearance: none;
background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23666' stroke-width='2'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
background-repeat: no-repeat;
background-position: right 12px center;
background-size: 12px;
padding-right: 36px;
}

.form-submit {
text-align: center;
margin-top: 25px;
margin-bottom: 25px;
}

.btn-success {
background: linear-gradient(135deg, #007bff, #0056b3);
color: white;
border: none;
padding: 14px 36px;
font-size: 1rem;
border-radius: 6px;
cursor: pointer;
transition: all 0.3s ease;
}

.btn-success:hover {
transform: translateY(-1px);
box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

/* 商城产品卡片 */
.products {
    margin-top: 30px;
}

.product-list {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.product-card {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    overflow: hidden;
    width: 360px;
    transition: transform 0.3s ease;
}

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

.product-image {
    width: 100%;
    height: 180px;
    overflow: hidden;
}

.product-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.product-card:hover .product-image img {
    transform: scale(1.05);
}

.product-card h3 {
    font-size: 1.2rem;
    margin: 15px 15px 10px;
    color: var(--dark-text);
}

.product-card p {
    margin: 0 15px 20px;
    color: #666;
    line-height: 1.5;
}
.back-to-top{text-decoration: none;color:#F77811}
#studentGrade{height:inherit}
/* 响应式：在中等屏幕下变为两行 */
@media (max-width: 992px) {
.form-row {
flex-wrap: wrap;
}

.form-group {
min-width: calc(50% - 7.5px); /* 一行最多放两个 */
}
}

/* 响应式：在小屏幕下变为单列 */
@media (max-width: 576px) {
.form-row,
.form-group {
flex-direction: column;
}

.form-group {
min-width: 100%;
}

.form-section {
padding: 30px 0;
}
}