* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background-color: #f5f5f5;
    color: #333;
}

.navbar {
    background: linear-gradient(135deg, #FF6600 0%, #FF8533 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(255,102,0,0.3);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 0;
}

.nav-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
    flex-wrap: wrap;
}

.nav-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.nav-label {
    font-weight: 500;
    opacity: 0.9;
}

.nav-link {
    background: rgba(255,255,255,0.2);
    color: white;
    text-decoration: none;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    transition: all 0.3s ease;
    white-space: nowrap;
    border: 1px solid rgba(255,255,255,0.3);
}

.nav-link:hover {
    background: rgba(255,255,255,0.25);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0,0,0,0.2);
}

.sop-buttons {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.sop-btn {
    background: rgba(255,255,255,0.15);
    color: white;
    text-decoration: none;
    padding: 0.4rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
    transition: background 0.3s;
    white-space: nowrap;
}

.sop-btn:hover {
    background: rgba(255,255,255,0.25);
}

.main-container {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 2fr 1fr;
    gap: 2rem;
    min-height: calc(100vh - 120px);
}

.left-panel,
.center-panel,
.right-panel {
    background: white;
    border-radius: 10px;
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    overflow: hidden;
}

.panel-header {
    background: #f8f9fa;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e9ecef;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.panel-header h3 {
    color: #495057;
    font-size: 1.1rem;
    font-weight: 600;
}

.dialogue-selector,
.feedback-selector {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e9ecef;
}

.dialogue-dropdown,
.feedback-dropdown {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 0.9rem;
}

.dialogue-list,
.dialogue-content,
.feedback-content {
    padding: 1.5rem;
    max-height: 600px;
    overflow-y: auto;
}

.dialogue-content {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 0.85rem;
    line-height: 1.3;
    padding: 0.8rem;
}

.feedback-content {
    line-height: 1.6;
}

.empty-state {
    text-align: center;
    color: #6c757d;
    padding: 2rem;
}

.loading {
    text-align: center;
    color: #6c757d;
    font-style: italic;
}

.feedback-btn {
    background: linear-gradient(135deg, #FF6600 0%, #FF8533 100%);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(255,102,0,0.2);
}

.feedback-btn:hover:not(:disabled) {
    background: linear-gradient(135deg, #E55A00 0%, #FF6600 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(255,102,0,0.4);
}

.feedback-btn:disabled {
    background: #6c757d;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.dialogue-item {
    padding: 0.8rem;
    margin-bottom: 0.5rem;
    border: 1px solid #e9ecef;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.2s;
}

.dialogue-item:hover {
    background: #fff5f0;
    border-color: #FF6600;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(255,102,0,0.15);
}

.dialogue-item.selected {
    background: #fff5f0;
    border-color: #FF6600;
    border-width: 2px;
    box-shadow: 0 3px 12px rgba(255,102,0,0.2);
}

.dialogue-meta {
    font-size: 0.8rem;
    color: #6c757d;
    margin-top: 0.3rem;
}

@media (max-width: 1200px) {
    .main-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    .nav-container {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-menu {
        flex-direction: column;
        gap: 1rem;
    }

    .sop-buttons {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .main-container {
        margin: 1rem auto;
        padding: 0 1rem;
    }

    .nav-container {
        padding: 0 1rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .sop-buttons {
        gap: 0.3rem;
    }

    .sop-btn {
        padding: 0.3rem 0.6rem;
        font-size: 0.8rem;
    }
}