:root {
    --primary-color: #4CAF50;
    --secondary-color: #f4f4f4;
    --text-color: #333;
    --dark-bg: #2c3e50;
    --light-bg: #fff;
    --border-color: #ddd;
    --link-color: #3498db;
    --success-color: #28a745;
    --error-color: #dc3545;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--secondary-color);
    color: var(--text-color);
    margin: 0;
    line-height: 1.6;
}

.header {
    background-color: var(--dark-bg);
    color: var(--light-bg);
    padding: 1rem 20px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.2);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    margin: 0;
    font-size: 1.5rem;
    font-weight: bold;
}

.logo-img {
    height: 40px;
    margin-right: 10px;
}

.nav a {
    color: var(--light-bg);
    text-decoration: none;
    font-weight: bold;
    padding: 8px 16px;
    border: 1px solid var(--light-bg);
    border-radius: 5px;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.nav a:hover {
    background-color: var(--light-bg);
    color: var(--dark-bg);
}

.main-content {
    max-width: 1200px;
    margin: 20px auto;
    padding: 0 20px;
}

.search-section, .list-section, .submission-section {
    background-color: var(--light-bg);
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    margin-bottom: 20px;
}

.search-container {
    display: flex;
}

#search-input {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

#search-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

h2 {
    color: var(--dark-bg);
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 10px;
    margin-top: 0;
}

.hidden {
    display: none;
}

.form-group {
    margin-bottom: 15px;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
}

.form-group input, .form-group textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    box-sizing: border-box;
}

.submission-section button {
    background-color: var(--primary-color);
    color: var(--light-bg);
    padding: 12px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.submission-section button:hover {
    background-color: #45a049;
}

.message {
    margin-top: 15px;
    font-weight: bold;
    padding: 10px;
    border-radius: 4px;
}

.message.success {
    color: var(--success-color);
    background-color: #d4edda;
}

.message.error {
    color: var(--error-color);
    background-color: #f8d7da;
}

.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
    margin-top: 20px;
}

.data-table th, .data-table td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background-color: var(--dark-bg);
    color: var(--light-bg);
    font-weight: bold;
}

.data-table td a {
    color: var(--link-color);
    text-decoration: none;
    font-weight: bold;
}
.data-table td a:hover {
    text-decoration: underline;
}

.loading-cell {
    text-align: center;
    font-style: italic;
    color: #888;
    padding: 20px;
}

.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 20px;
    gap: 10px;
}

.pagination-container button {
    background-color: #007bff;
    color: white;
    border: none;
    padding: 8px 12px;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
}

.pagination-container button:hover:not(:disabled) {
    background-color: #0056b3;
}

.pagination-container button:disabled {
    background-color: #cccccc;
    cursor: not-allowed;
}

#page-info {
    font-weight: bold;
    color: #555;
    white-space: nowrap;
}

.footer {
    text-align: center;
    padding: 20px;
    background-color: var(--dark-bg);
    color: var(--light-bg);
    margin-top: 40px;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .header-container {
        flex-direction: column;
        text-align: center;
    }
    .nav {
        margin-top: 15px;
    }
}