:root {
    --primary-color: #3498db;
    --hover-color: #2980b9;
    --success-color: #2ecc71;
    --warning-color: #f39c12;
    --danger-color: #e74c3c;
    --light-bg: #ecf0f1;
    --border-color: #ddd;
    --text-color: #333;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 20px auto;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

header {
    background-color: var(--primary-color);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

nav ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
}

nav li {
    margin-right: 15px;
    margin-bottom: 5px;
}

nav a {
    text-decoration: none;
    color: white;
    padding: 8px 15px;
    border-radius: 4px;
    transition: background-color 0.3s;
    cursor: pointer;
    display: block;
}

nav a:hover,
nav a.active {
    background-color: rgba(255, 255, 255, 0.2);
}

main {
    padding: 20px;
}

section {
    animation: fadeIn 0.3s ease-in-out;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

h2 {
    margin-top: 0;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--light-bg);
    color: var(--primary-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 10px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

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

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

tr:nth-child(even) {
    background-color: #f9f9f9;
}

tr:hover {
    background-color: #f1f1f1;
}

.actions {
    display: flex;
    gap: 5px;
    flex-wrap: wrap;
}

.btn {
    padding: 6px 12px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 14px;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-success {
    background-color: var(--success-color);
    color: white;
}

.btn-warning {
    background-color: var(--warning-color);
    color: white;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
}

.btn-secondary {
    background-color: #95a5a6;
    color: white;
}

.btn:hover {
    opacity: 0.9;
    transform: translateY(-2px);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.card {
    border: 1px solid var(--border-color);
    border-radius: 5px;
    padding: 20px;
    margin-bottom: 20px;
    background-color: #fff;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

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

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

input[type="text"],
input[type="number"],
input[type="date"],
input[type="datetime-local"],
input[type="email"],
input[type="tel"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 16px;
}

textarea {
    min-height: 80px;
    resize: vertical;
}

.search-bar {
    margin-bottom: 20px;
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.search-bar input,
.search-bar select {
    flex: 1;
    min-width: 180px;
}

.search-bar button {
    flex-shrink: 0;
}

.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab-link {
    padding: 10px 20px;
    cursor: pointer;
    border: 1px solid transparent;
    border-bottom: none;
    border-radius: 5px 5px 0 0;
    margin-bottom: -1px;
}

.tab-link.active {
    background-color: #f1f1f1;
    border-color: var(--border-color);
    font-weight: bold;
}

.sub-menu-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.sub-menu-link {
    padding: 8px 16px;
    text-decoration: none;
    color: var(--text-secondary);
    border-radius: 4px;
    transition: all 0.2s;
    font-size: 14px;
}

.sub-menu-link:hover {
    background-color: #f5f5f5;
    color: var(--primary-color);
}

.sub-menu-link.active {
    background-color: var(--primary-color);
    color: white;
    font-weight: 500;
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.status-badge {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
}

.status-active,
.status-completed {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.status-inactive,
.status-delayed {
    background-color: #ffebee;
    color: #c62828;
    font-weight: bold;
}

.status-pending {
    background-color: #fff8e1;
    color: #f57f17;
}

.status-warning {
    background-color: #fff3e0;
    color: #ef6c00;
}

.timeline {
    position: relative;
    padding-left: 30px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 10px;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
}

.timeline-item {
    margin-bottom: 20px;
    position: relative;
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -25px;
    top: 5px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: var(--primary-color);
    border: 2px solid white;
    box-shadow: 0 0 0 1px var(--border-color);
}

.file-list {
    list-style: none;
    padding-left: 0;
}

.file-list li {
    padding: 5px 0;
    border-bottom: 1px dashed #eee;
}

.file-list li:last-child {
    border-bottom: none;
}

.back-btn {
    margin-bottom: 15px;
}

.notification {
    padding: 15px;
    margin-bottom: 20px;
    border-radius: 4px;
}

.notification.success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.notification.error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

.notification.info {
    background-color: #cce5ff;
    color: #004085;
    border: 1px solid #b8daff;
}

.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    overflow: auto;
    background-color: rgba(0, 0, 0, 0.5);
    padding: 20px;
}

.modal-content {
    background-color: #fefefe;
    margin: auto;
    padding: 20px;
    border: none;
    border-radius: 8px;
    max-width: 600px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
    animation: modalopen 0.4s;
}

@keyframes modalopen {
    from {
        opacity: 0;
        transform: translateY(-60px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.close {
    color: #aaa;
    float: right;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
}

.close:hover,
.close:focus {
    color: black;
    text-decoration: none;
}

footer {
    text-align: center;
    padding: 20px;
    color: #7f8c8d;
    font-size: 0.9em;
    border-top: 1px solid var(--border-color);
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

@media (max-width: 768px) {
    nav ul {
        flex-direction: column;
    }

    nav li {
        margin-right: 0;
    }
}

/* 操作提示图标样式 */
.tip-icon {
    display: inline-block;
    width: 16px;
    height: 16px;
    line-height: 16px;
    text-align: center;
    background-color: #3498db;
    color: white;
    border-radius: 50%;
    font-size: 11px;
    font-weight: bold;
    cursor: help;
    margin-left: 5px;
    vertical-align: middle;
    position: relative;
}

.tip-icon:hover {
    background-color: #2980b9;
}

.tip-tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    margin-bottom: 5px;
    padding: 10px 14px;
    background-color: #333;
    color: white;
    border-radius: 4px;
    font-size: 13px;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
    z-index: 1000;
    min-width: 300px;
    max-width: 450px;
    width: max-content;
    white-space: normal;
    line-height: 1.6;
    word-wrap: break-word;
    word-break: normal;
    text-align: left;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.tip-icon:hover .tip-tooltip {
    opacity: 1;
}

.tip-tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: #333;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 1px solid var(--border-color);
}

.stat-card p {
    margin: 0;
    color: #7f8c8d;
    font-size: 0.9em;
}

.stat-card h3 {
    margin: 10px 0 5px;
    font-size: 2em;
    color: var(--primary-color);
}

.stat-card span {
    font-size: 0.85em;
    color: #95a5a6;
}

.empty-text {
    text-align: center;
    color: #95a5a6;
    padding: 15px 0;
}
.tip-inline {
    display: inline-flex;
    align-items: center;
    gap: 5px;
}