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

body {
    font-family: 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 顶部导航 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #673DE6;
}

.nav ul {
    display: flex;
    list-style: none;
}

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    transition: color 0.3s;
}

.nav ul li a:hover {
    color: #673DE6;
}

/* Hero区域 */
.hero {
    background: linear-gradient(135deg, #673DE6 0%, #4A2ABB 100%);
    color: white;
    padding: 150px 0 100px;
    text-align: center;
}

.page-content {
    padding-top: 88px;
}

.concept-section {
    padding: 70px 0 20px;
    background: #f8f7ff;
}

.concept-card {
    background: linear-gradient(135deg, #ffffff 0%, #f5f1ff 100%);
    border: 1px solid #ece8ff;
    border-radius: 24px;
    padding: 38px;
    box-shadow: 0 18px 50px rgba(103, 61, 230, 0.08);
}

.concept-tag {
    display: inline-block;
    padding: 8px 16px;
    border-radius: 999px;
    background: rgba(103, 61, 230, 0.12);
    color: #673DE6;
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 18px;
}

.concept-card h2 {
    font-size: 2rem;
    color: #1f2340;
    margin-bottom: 18px;
}

.concept-card p {
    font-size: 1.05rem;
    color: #545d76;
    line-height: 1.9;
    margin-bottom: 14px;
}

.tutorial-preview-section {
    padding: 20px 0 85px;
    background: #f8f9fa;
}

.tutorial-preview-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(320px, 560px);
    gap: 32px;
    align-items: center;
    background: linear-gradient(135deg, #ffffff 0%, #f3efff 100%);
    border: 1px solid #ece8ff;
    border-radius: 24px;
    padding: 34px;
    box-shadow: 0 18px 50px rgba(103, 61, 230, 0.08);
}

.tutorial-preview-content h2 {
    font-size: 2rem;
    color: #1f2340;
    margin-bottom: 16px;
}

.tutorial-preview-content p {
    font-size: 1.05rem;
    color: #566074;
    line-height: 1.9;
    margin-bottom: 24px;
}

.tutorial-preview-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.tutorial-preview-actions .btn-secondary {
    color: #673DE6;
    border-color: #673DE6;
}

.tutorial-preview-actions .btn-secondary:hover {
    background: rgba(103, 61, 230, 0.08);
}

.tutorial-video-wrap {
    border-radius: 20px;
    overflow: hidden;
    background: #120f24;
    box-shadow: 0 18px 40px rgba(31, 35, 64, 0.22);
}

.tutorial-video-wrap video {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 16 / 9;
    background: #000;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 20px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.btn {
    display: inline-block;
    padding: 15px 30px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #fff;
    color: #673DE6;
}

.btn-primary:hover {
    background-color: #f0f0f0;
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.btn-secondary {
    background-color: transparent;
    color: #fff;
    border: 2px solid #fff;
}

.btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateY(-3px);
}

/* 优势板块 */
.advantages {
    padding: 100px 0;
    background-color: #fff;
}

.number-sections {
    padding: 90px 0;
    background-color: #fff;
}

.number-sections h2 {
    text-align: center;
    font-size: 2.4rem;
    margin-bottom: 50px;
    color: #333;
}

.number-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 24px;
}

.number-card {
    background: #fff;
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: 0 10px 30px rgba(103, 61, 230, 0.08);
    border: 1px solid #ece8ff;
}

.number-badge {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 54px;
    height: 54px;
    padding: 0 14px;
    border-radius: 999px;
    background: linear-gradient(135deg, #673DE6 0%, #4A2ABB 100%);
    color: #fff;
    font-weight: 700;
    margin-bottom: 18px;
}

.number-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: #1f2340;
}

.number-card p {
    color: #596178;
    line-height: 1.8;
}

.advantages h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

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

.advantage-item {
    text-align: center;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.advantage-item:hover {
    transform: translateY(-10px);
}

.advantage-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #673DE6;
}

.transition-text {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: #673DE6;
    margin-top: 50px;
}

/* 痛点板块 */
.pain-points {
    padding: 100px 0;
    background-color: #f0f2ff;
}

.pain-points h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

.pain-points-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-bottom: 50px;
}

.pain-point {
    background-color: #fff;
    padding: 20px 30px;
    border-radius: 50px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    font-weight: 500;
}

.solution {
    text-align: center;
}

.solution h3 {
    font-size: 2rem;
    color: #673DE6;
}

/* 功能展示板块 */
.features {
    padding: 100px 0;
    background-color: #fff;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

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

.feature-item {
    text-align: center;
    padding: 40px 20px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(103, 61, 230, 0.1);
}

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-item h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
}

.focus-text {
    text-align: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: #673DE6;
}

/* 工作流程展示 */
.workflow {
    padding: 100px 0;
    background-color: #f0f2ff;
}

.workflow h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

.workflow-steps {
    display: flex;
    justify-content: space-around;
    flex-wrap: wrap;
    gap: 30px;
}

.step {
    text-align: center;
    flex: 1;
    min-width: 200px;
}

.step-number {
    width: 60px;
    height: 60px;
    background-color: #673DE6;
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 1.3rem;
    color: #333;
}

/* 收益模型展示 */
.revenue-model {
    padding: 100px 0;
    background-color: #fff;
}

.revenue-model h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

.revenue-content {
    text-align: center;
}

.revenue-content h3 {
    font-size: 2rem;
    color: #673DE6;
    margin-bottom: 40px;
}

.revenue-points {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.revenue-points p {
    font-size: 1.2rem;
    font-weight: 500;
}

/* 适用人群 */
.target-audience {
    padding: 100px 0;
    background-color: #f0f2ff;
}

.target-audience h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    color: #333;
}

.audience-grid {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.audience-item {
    background-color: #673DE6;
    color: white;
    padding: 15px 30px;
    border-radius: 50px;
    font-weight: 500;
}

/* 行动号召 */
.cta-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #673DE6 0%, #4A2ABB 100%);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 40px;
}

/* 联系页面样式 */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.contact-card {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-10px);
}

.contact-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    color: #673DE6;
}

.contact-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: #333;
}

.contact-card p {
    margin: 5px 0;
    color: #666;
}

.contact-direct-card p {
    word-break: break-word;
}

.contact-direct-link {
    color: #673DE6;
    text-decoration: none;
    font-weight: 600;
}

.contact-direct-link:hover {
    text-decoration: underline;
}

.contact-direct-text {
    color: #444;
    font-weight: 600;
}

.contact-form {
    background-color: #fff;
    border-radius: 10px;
    padding: 40px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    max-width: 800px;
    margin: 0 auto;
}

.message-tip-box {
    margin-bottom: 28px;
}

.simple-intro-block {
    margin-bottom: 40px;
}

.form-feedback {
    padding: 14px 16px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 500;
}

.form-feedback.success {
    background: #e8fff3;
    color: #1a7a4a;
}

.form-feedback.error {
    background: #fef2f2;
    color: #dc2626;
}

.simple-feature-section {
    background: #fff;
    border-radius: 18px;
    padding: 34px 28px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    margin-bottom: 24px;
}

.simple-feature-section h2 {
    text-align: left;
    font-size: 1.8rem;
    margin-bottom: 14px;
    color: #673DE6;
}

.simple-feature-section p {
    font-size: 1.05rem;
    color: #566074;
    line-height: 1.9;
}

.form-group {
    margin-bottom: 25px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #333;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-family: inherit;
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #673DE6;
}

.social-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 30px;
}

.social-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-decoration: none;
    color: #333;
    transition: transform 0.3s ease;
}

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

.social-icon {
    font-size: 3rem;
    margin-bottom: 10px;
}

.map-container {
    margin-top: 30px;
}

.map-placeholder {
    background-color: #f0f2ff;
    border-radius: 10px;
    padding: 50px;
    text-align: center;
    color: #666;
}

/* 页脚 */
.footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 30px 0;
}

.footer a {
    color: #673DE6;
    text-decoration: none;
}

.footer a:hover {
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .page-content {
        padding-top: 118px;
    }

    .concept-card {
        padding: 24px;
    }

    .tutorial-preview-section {
        padding: 10px 0 70px;
    }

    .tutorial-preview-card {
        grid-template-columns: 1fr;
        padding: 24px;
    }

    .tutorial-preview-content h2 {
        font-size: 1.55rem;
    }

    .tutorial-preview-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .concept-card h2 {
        font-size: 1.5rem;
    }

    .hero h1 {
        font-size: 2rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .header .container {
        flex-direction: column;
        padding: 10px 0;
    }
    
    .nav ul {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav ul li {
        margin: 5px 10px;
    }
    
    .workflow-steps {
        flex-direction: column;
        align-items: center;
    }
    
    .revenue-points {
        flex-direction: column;
        align-items: center;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .contact-form {
        padding: 20px;
    }
    
    .social-links {
        flex-direction: column;
        gap: 20px;
    }
}