:root {
    --primary-color: #2c3e50;
    --secondary-color: #3498db;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --success-color: #27ae60;
    --info-color: #17a2b8;
    --light-bg: #f8f9fa;
    --border-radius: 12px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    --transition: all 0.3s ease;
}

body {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    min-height: 100vh;
}

.container {
    max-width: 1200px;
    margin-bottom: 3rem;
}

.header-card {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
    color: white;
    border-radius: var(--border-radius);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
    border: none;
}

.header-card h1 {
    font-weight: 700;
    margin-bottom: 0.5rem;
    font-size: 2.2rem;
}

.header-card .subtitle {
    opacity: 0.9;
    font-size: 1.1rem;
}

.warning-alert {
    background: #fff3cd;
    border: 2px solid var(--warning-color);
    border-radius: var(--border-radius);
    padding: 1rem 1.5rem;
    margin-bottom: 2rem;
    box-shadow: var(--box-shadow);
    display: flex;
    align-items: center;
}

.warning-alert .alert-icon {
    color: var(--danger-color);
    font-size: 1.5rem;
    margin-right: 15px;
    flex-shrink: 0;
}

.content-card {
    background: white;
    border-radius: var(--border-radius);
    padding: 2.5rem;
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
    border: none;
}

.section-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1.5rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--secondary-color);
    display: flex;
    align-items: center;
    gap: 10px;
}

.category-card {
    background: white;
    border: 2px solid var(--light-bg);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 2rem;
    transition: var(--transition);
}

.category-card:hover {
    border-color: var(--secondary-color);
    transform: translateY(-5px);
    box-shadow: var(--box-shadow);
}

.category-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--light-bg);
}

.category-icon {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #2980b9 100%);
    color: white;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.category-title {
    flex: 1;
}

.category-title h3 {
    color: var(--primary-color);
    font-weight: 600;
    margin: 0;
}

.category-title p {
    color: #6c757d;
    margin: 0.25rem 0 0 0;
    font-size: 0.95rem;
}

/* 表格样式 */
.terminology-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.terminology-table thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, #34495e 100%);
}

.terminology-table th {
    color: white;
    font-weight: 600;
    padding: 1rem 1.5rem;
    text-align: left;
    border: none;
}

.terminology-table tbody tr {
    transition: var(--transition);
}

.terminology-table tbody tr:hover {
    background-color: rgba(52, 152, 219, 0.05);
}

.terminology-table td {
    padding: 1rem 1.5rem;
    border-bottom: 1px solid #e9ecef;
    vertical-align: top;
}

.terminology-table td:first-child {
    font-weight: 600;
    color: var(--primary-color);
    width: 35%;
    border-right: 1px solid #e9ecef;
}

.terminology-table td:last-child {
    color: #495057;
}

.term-explanation {
    font-size: 0.9rem;
    color: #6c757d;
    margin-top: 0.25rem;
    font-style: italic;
}

/* 快速导航 */
.quick-nav {
    position: sticky;
    top: 20px;
    z-index: 100;
    background: white;
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--box-shadow);
    margin-bottom: 2rem;
}

.quick-nav-title {
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.nav-link {
    background: var(--light-bg);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.nav-link:hover {
    background: var(--secondary-color);
    color: white;
    text-decoration: none;
    transform: translateY(-2px);
}

.nav-link.active {
    background: var(--secondary-color);
    color: white;
}

.info-box {
    background: #e8f4fc;
    border-left: 4px solid var(--secondary-color);
    padding: 1.5rem;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    margin-top: 2rem;
}

.info-box h5 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 打印按钮 */
.print-btn {
    background: linear-gradient(135deg, var(--success-color) 0%, #2ecc71 100%);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    font-weight: 600;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 10px rgba(39, 174, 96, 0.2);
    margin-bottom: 1.5rem;
}

.print-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(39, 174, 96, 0.3);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .header-card,
    .content-card {
        padding: 1.5rem;
    }

    .header-card h1 {
        font-size: 1.8rem;
    }

    .category-card {
        padding: 1.25rem;
    }

    .terminology-table th,
    .terminology-table td {
        padding: 0.75rem 1rem;
    }

    .terminology-table td:first-child {
        width: 40%;
    }

    .quick-nav {
        position: static;
    }

    .nav-links {
        gap: 0.5rem;
    }

    .nav-link {
        font-size: 0.85rem;
        padding: 0.4rem 0.8rem;
    }
}

@media (max-width: 576px) {
    .header-card {
        padding: 1.5rem;
    }

    .content-card {
        padding: 1.25rem;
    }

    .category-header {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }

    .category-icon {
        width: 45px;
        height: 45px;
        font-size: 1.2rem;
    }

    .terminology-table {
        display: block;
        overflow-x: auto;
    }

    .terminology-table td:first-child {
        width: 150px;
        min-width: 150px;
    }
}