/* ==========================================================================
   首页专用样式 - 从 index.html 提取
   优化后异步加载以提升性能
   ========================================================================== */

/* Hero Section */
.hero-section {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    padding: 100px 0 80px;
    color: white;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 24px;
    font-weight: 400;
    margin-bottom: 20px;
    opacity: 0.95;
}

.hero-description {
    font-size: 16px;
    line-height: 1.8;
    margin-bottom: 35px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
}

.hero-keywords {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.hero-keywords span {
    padding: 8px 16px;
    background: rgba(255,255,255,0.2);
    border-radius: 20px;
    font-size: 14px;
}

.software-preview {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.2);
}

.preview-placeholder {
    aspect-ratio: 4/3;
    background: #f5f7fa;
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #999;
}

/* Features Section */
.features-section {
    padding: 80px 0;
    background: #f8f9fa;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    color: #333;
    margin-bottom: 15px;
}

.section-header p {
    font-size: 16px;
    color: #666;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.feature-card {
    background: white;
    padding: 35px 25px;
    border-radius: 12px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

.feature-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.feature-card h3 {
    font-size: 20px;
    color: #333;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 15px;
}

.feature-link {
    color: #4c5fd5;
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
}

/* Advantages Section */
.advantages-section {
    padding: 80px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.advantage-card {
    text-align: center;
}

.advantage-number {
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 20px;
}

.advantage-card h3 {
    font-size: 22px;
    color: #333;
    margin-bottom: 15px;
}

.advantage-card p {
    font-size: 15px;
    color: #666;
    line-height: 1.7;
}

/* Articles Section */
.articles-section {
    padding: 80px 0;
    background: #f8f9fa;
}

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

.article-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}

.article-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
}

.article-image {
    height: 200px;
    background-size: cover;
    background-position: center;
}

.article-image-placeholder {
    background: #f5f7fa;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ccc;
}

.article-content {
    padding: 25px;
}

.article-content h3 {
    font-size: 18px;
    margin-bottom: 12px;
}

.article-content h3 a {
    color: #333;
    text-decoration: none;
}

.article-content h3 a:hover {
    color: #4c5fd5;
}

.article-content p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 15px;
}

.article-meta {
    display: flex;
    gap: 20px;
    font-size: 13px;
    color: #666;
    font-weight: 500;
}

/* CTA Section */
.cta-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    text-align: center;
    color: white;
}

.cta-content h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta-content p {
    font-size: 18px;
    margin-bottom: 35px;
    opacity: 0.9;
}

.section-cta {
    text-align: center;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .section-header h2 {
        font-size: 28px;
    }
}