.help-container {
    max-width: 1000px;
    margin: 10px auto;
    padding: 15px;
    background: rgba(255, 255, 255, 0.95);
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    height: 95vh;
    display: flex;
    flex-direction: column;
}

.help-content {
    padding: 10px;
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.step-navigation {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 10px;
    padding: 8px;
    background: #f5f5f5;
    border-radius: 8px;
}

.nav-button {
    padding: 8px 16px;
    background: linear-gradient(135deg, #87CEFA, #6495ED);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.nav-button:disabled {
    background: #cccccc;
    cursor: not-allowed;
}

.nav-button:hover:not(:disabled) {
    transform: translateY(-2px);
}

.close-button {
    padding: 8px 16px;
    background: #ff4444;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.close-button:hover {
    background: #cc0000;
}

.step-content {
    margin-bottom: 10px;
    line-height: 1.5;
    flex-shrink: 0;
    color: #333;
}

.video-container {
    position: relative;
    width: 100%;
    max-width: 800px;
    margin: 0 auto;
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.video-container video {
    width: 100%;
    max-height: calc(95vh - 200px);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    object-fit: contain;
}

.video-container iframe {
    width: 100%;
    height: calc(95vh - 200px);
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    background: white;
}

#stepIndicator {
    font-size: 1.1em;
    color: #666;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .help-container {
        margin: 5px;
        padding: 10px;
        height: 98vh;
    }

    .video-container video,
    .video-container iframe {
        max-height: calc(98vh - 220px);
    }

    .nav-button, .close-button {
        padding: 6px 12px;
        font-size: 0.9em;
    }
}

/* 设备选择样式 */
.device-selection {
    margin: 10px 0;
}

.selection-group {
    margin-bottom: 10px;
}

.selection-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #333;
}

.select-input {
    width: 100%;
    max-width: 300px;
    padding: 8px;
    border: 1px solid #ccc;
    border-radius: 4px;
    font-size: 16px;
    background-color: white;
}

.select-input:focus {
    border-color: #87CEFA;
    outline: none;
    box-shadow: 0 0 5px rgba(135, 206, 250, 0.3);
}

.error-message {
    color: #ff4444;
    margin-top: 10px;
    font-size: 0.9em;
}

/* 添加播放按钮样式 */
.play-button {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    padding: 10px 20px;
    background: linear-gradient(135deg, #87CEFA, #6495ED);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    z-index: 10;
    transition: all 0.3s ease;
}

.play-button:hover {
    transform: translate(-50%, -50%) scale(1.1);
    background: linear-gradient(135deg, #6495ED, #4169E1);
}