/* 导航栏样式 */
.main-nav {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 3px solid rgba(255, 255, 255, 0.1);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 20px;
    height: 70px;
}

.nav-brand h1 {
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: 2px;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 12px 20px;
    border-radius: 25px;
    transition: all 0.3s ease;
    font-weight: 500;
    display: block;
    border: 2px solid transparent;
}

.nav-menu a:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateY(-2px);
}

.nav-menu .active a {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border-color: rgba(255, 255, 255, 0.3);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: 15px 20px;
    }
    
    .nav-brand {
        margin-bottom: 15px;
    }
    
    .nav-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-menu a {
        padding: 10px 15px;
        font-size: 0.9rem;
    }
}

/* 页面容器调整 */
.container {
    margin-top: 20px;
}

/* 页面头部样式 */
.page-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 40px 20px;
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    border-radius: 20px;
    color: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.page-header h2 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.page-header p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin: 0;
}

/* 视频类型卡片样式 */
.video-type-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.video-type-card {
    position: relative;
}

.video-type-card input[type="radio"] {
    display: none;
}

.video-type-card label {
    display: block;
    padding: 30px;
    background: white;
    border: 2px solid #e2e8f0;
    border-radius: 15px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.video-type-card label:hover {
    border-color: #667eea;
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.video-type-card input[type="radio"]:checked + label {
    border-color: #667eea;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.video-type-card h4 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    font-weight: 600;
}

.video-type-card p {
    opacity: 0.8;
    line-height: 1.5;
    margin: 0;
}

.card-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    background: #10b981;
    color: white;
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 600;
}

/* 参数网格布局 */
.params-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.param-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.param-group label {
    font-weight: 600;
    color: #2d3748;
}

.param-group input,
.param-group select {
    padding: 12px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.param-group input:focus,
.param-group select:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.slider-value {
    font-weight: 600;
    color: #667eea;
    text-align: center;
}