/* 响应式设计样式 */
* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Microsoft YaHei', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f5f5;
}

/* 容器样式 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.admin-box {
    max-width: 1200px;
    margin: 20px auto;
    padding: 20px;
    background: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

/* 标题样式 */
h1, h2, h3, h4, h5, h6 {
    margin: 0 0 15px 0;
    color: #2c3e50;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    margin: 5px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    font-size: 14px;
    transition: all 0.3s ease;
    min-width: 80px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.2);
}

.btn-primary { background: #3498db; color: #fff; }
.btn-success { background: #27ae60; color: #fff; }
.btn-warning { background: #f39c12; color: #fff; }
.btn-danger { background: #e74c3c; color: #fff; }
.btn-info { background: #95a5a6; color: #fff; }

/* 表单样式 */
.form-group {
    margin: 15px 0;
}

.form-group label {
    display: block;
    margin-bottom: 5px;
    font-weight: bold;
    color: #2c3e50;
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid #ddd;
    border-radius: 5px;
    font-size: 14px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: #3498db;
    box-shadow: 0 0 5px rgba(52,152,219,0.3);
}

/* 卡片样式 */
.card {
    background: #fff;
    border-radius: 8px;
    padding: 20px;
    margin: 15px 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.15);
}

/* 列表样式 */
.list-item {
    background: #fff;
    padding: 15px;
    margin: 10px 0;
    border-radius: 8px;
    border: 1px solid #eee;
    transition: all 0.3s ease;
}

.list-item:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

/* 表格样式 */
.table-responsive {
    overflow-x: auto;
    margin: 15px 0;
}

table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

th, td {
    padding: 12px 15px;
    text-align: left;
    border-bottom: 1px solid #eee;
}

th {
    background: #f8f9fa;
    font-weight: bold;
    color: #2c3e50;
}

tr:hover {
    background: #f8f9fa;
}

/* 状态样式 */
.status {
    padding: 4px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: bold;
}

.status-success { background: #d4edda; color: #155724; }
.status-warning { background: #fff3cd; color: #856404; }
.status-danger { background: #f8d7da; color: #721c24; }
.status-info { background: #d1ecf1; color: #0c5460; }

/* 消息样式 */
.message {
    padding: 15px;
    margin: 15px 0;
    border-radius: 5px;
    border-left: 4px solid;
}

.message-success {
    background: #d4edda;
    border-color: #27ae60;
    color: #155724;
}

.message-error {
    background: #f8d7da;
    border-color: #e74c3c;
    color: #721c24;
}

.message-warning {
    background: #fff3cd;
    border-color: #f39c12;
    color: #856404;
}

.message-info {
    background: #d1ecf1;
    border-color: #3498db;
    color: #0c5460;
}

/* 导航样式 */
.nav {
    background: #2c3e50;
    padding: 15px 0;
    margin-bottom: 20px;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.nav-brand {
    color: #fff;
    font-size: 1.5rem;
    font-weight: bold;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-menu li {
    margin-left: 20px;
}

.nav-menu a {
    color: #fff;
    text-decoration: none;
    padding: 8px 12px;
    border-radius: 4px;
    transition: background 0.3s ease;
}

.nav-menu a:hover {
    background: rgba(255,255,255,0.1);
}

/* 网格系统 */
.row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -15px;
}

.col {
    flex: 1;
    padding: 0 15px;
}

.col-1 { flex: 0 0 8.333333%; }
.col-2 { flex: 0 0 16.666667%; }
.col-3 { flex: 0 0 25%; }
.col-4 { flex: 0 0 33.333333%; }
.col-6 { flex: 0 0 50%; }
.col-8 { flex: 0 0 66.666667%; }
.col-9 { flex: 0 0 75%; }
.col-12 { flex: 0 0 100%; }

/* 工具类 */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 0.25rem; }
.mt-2 { margin-top: 0.5rem; }
.mt-3 { margin-top: 1rem; }
.mt-4 { margin-top: 1.5rem; }
.mt-5 { margin-top: 3rem; }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: 0.25rem; }
.mb-2 { margin-bottom: 0.5rem; }
.mb-3 { margin-bottom: 1rem; }
.mb-4 { margin-bottom: 1.5rem; }
.mb-5 { margin-bottom: 3rem; }

.p-0 { padding: 0; }
.p-1 { padding: 0.25rem; }
.p-2 { padding: 0.5rem; }
.p-3 { padding: 1rem; }
.p-4 { padding: 1.5rem; }
.p-5 { padding: 3rem; }

.d-none { display: none; }
.d-block { display: block; }
.d-flex { display: flex; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }

/* 移动端优化 */
@media (max-width: 768px) {
    .container {
        padding: 0 10px;
    }
    
    .admin-box {
        margin: 10px;
        padding: 15px;
    }
    
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    h4 { font-size: 1.25rem; }
    
    .btn {
        padding: 12px 16px;
        margin: 3px;
        font-size: 16px;
        min-width: 100px;
    }
    
    .form-group input,
    .form-group textarea,
    .form-group select {
        padding: 15px;
        font-size: 16px; /* 防止iOS缩放 */
    }
    
    .nav-container {
        flex-direction: column;
        text-align: center;
    }
    
    .nav-menu {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .nav-menu li {
        margin: 5px 10px;
    }
    
    .row {
        flex-direction: column;
    }
    
    .col {
        flex: 0 0 100%;
        margin-bottom: 15px;
    }
    
    /* 移动端表格优化 */
    .table-responsive {
        font-size: 14px;
    }
    
    th, td {
        padding: 8px 10px;
    }
    
    /* 移动端卡片优化 */
    .card {
        padding: 15px;
        margin: 10px 0;
    }
    
    .list-item {
        padding: 12px;
        margin: 8px 0;
    }
}

/* 平板端优化 */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        padding: 0 20px;
    }
    
    .admin-box {
        margin: 15px;
        padding: 20px;
    }
    
    .btn {
        padding: 10px 18px;
        margin: 4px;
    }
    
    .col-6 {
        flex: 0 0 50%;
    }
    
    .col-4 {
        flex: 0 0 50%;
    }
}

/* 大屏幕优化 */
@media (min-width: 1025px) {
    .container {
        padding: 0 30px;
    }
    
    .admin-box {
        margin: 30px auto;
        padding: 30px;
    }
    
    .btn {
        padding: 12px 24px;
        margin: 6px;
    }
}

/* 打印样式 */
@media print {
    .btn,
    .nav,
    .no-print {
        display: none !important;
    }
    
    .admin-box {
        box-shadow: none;
        border: 1px solid #ccc;
    }
    
    body {
        background: #fff;
    }
}

/* 动画效果 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #3498db;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* 工具提示 */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltiptext {
    visibility: hidden;
    width: 120px;
    background-color: #555;
    color: #fff;
    text-align: center;
    border-radius: 6px;
    padding: 5px;
    position: absolute;
    z-index: 1;
    bottom: 125%;
    left: 50%;
    margin-left: -60px;
    opacity: 0;
    transition: opacity 0.3s;
}

.tooltip:hover .tooltiptext {
    visibility: visible;
    opacity: 1;
}