/**
 * intro.css - 介绍页/使用教程样式
 */

/* === 视图2: 介绍页 === */
#view-intro {
    padding: 20px;
    overflow-y: auto;
    background: var(--bg-color);
}

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

.intro-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: #2b2c2f;
    border-radius: 12px;
    border: 1px solid #444;
}
.intro-header h1 { color: var(--accent-color); margin: 0 0 15px 0; font-size: 2rem; }
.intro-header p { color: #ccc; font-size: 1.1rem; line-height: 1.6; max-width: 800px; margin: 0 auto; }

.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    padding-bottom: 40px;
}

.feature-card {
    background: #2b2c2f;
    border: 1px solid #444;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}
.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.3);
    border-color: var(--accent-color);
}

.feature-card-header {
    background: rgba(16, 163, 127, 0.1);
    padding: 15px 20px;
    border-bottom: 1px solid #444;
}
.feature-card-header h3 { margin: 0; color: var(--accent-color); font-size: 1.2rem; }

.feature-card-body { padding: 20px; flex: 1; }

.feature-item {
    margin-bottom: 15px;
    padding: 10px;
    background: #343541;
    border-radius: 6px;
    border-left: 3px solid #555;
}
.feature-item:last-child { margin-bottom: 0; }
.feature-title { color: #eee; font-weight: bold; margin-bottom: 5px; display: block; }
.feature-desc { color: #aaa; font-size: 0.9rem; line-height: 1.5; }

/* === 使用教程样式 === */
.tutorials-container { 
    max-width: 1200px; 
    margin: 0 auto; 
    padding: 20px;
}

.tutorials-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: linear-gradient(135deg, #1a2e28 0%, #0d1117 100%);
    border-radius: 12px;
    border: 1px solid rgba(16, 163, 127, 0.3);
}
.tutorials-header h1 { 
    color: var(--accent-color); 
    margin: 0 0 15px 0; 
    font-size: 2rem; 
}
.tutorials-header p { 
    color: #aaa; 
    font-size: 1.1rem; 
    line-height: 1.6; 
}

.tutorials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
    padding-bottom: 40px;
}

.tutorial-card {
    background: #2b2c2f;
    border: 1px solid #444;
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
}
.tutorial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0,0,0,0.4);
    border-color: var(--accent-color);
}

.tutorial-card-header {
    background: rgba(16, 163, 127, 0.15);
    padding: 18px 20px;
    border-bottom: 1px solid #444;
}
.tutorial-card-header h3 { 
    margin: 0; 
    color: var(--accent-color); 
    font-size: 1.2rem; 
}

.tutorial-card-body { 
    padding: 20px; 
}

.tutorial-content {
    color: #ccc;
    font-size: 0.95rem;
    line-height: 1.7;
    margin-bottom: 20px;
}

/* 教程图片展示 - 单图模式 */
.tutorial-images.single {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}
.tutorial-images.single img {
    width: 120px;
    height: 120px;
    object-fit: cover;
    border-radius: 8px;
    border: 2px solid #444;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
}
.tutorial-images.single img:hover {
    transform: scale(1.05);
    border-color: var(--accent-color);
}

/* 教程图片展示 - 对比模式 */
.tutorial-images.compare {
    display: flex;
    flex-direction: column;
    gap: 15px;
}
.compare-group {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 12px;
    background: #343541;
    border-radius: 8px;
}
.compare-item {
    text-align: center;
}
.compare-item img {
    width: 100px;
    height: 100px;
    object-fit: cover;
    border-radius: 6px;
    border: 2px solid #555;
    cursor: pointer;
    transition: transform 0.2s, border-color 0.2s;
}
.compare-item img:hover {
    transform: scale(1.05);
    border-color: var(--accent-color);
}
.compare-label {
    display: block;
    font-size: 0.75rem;
    color: #888;
    margin-bottom: 6px;
}
.compare-arrow {
    font-size: 1.5rem;
    color: var(--accent-color);
    flex-shrink: 0;
}
.compare-item .placeholder {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #444;
    border-radius: 6px;
    color: #666;
    font-size: 0.8rem;
}