/**
 * 移动端响应式CSS框架
 * 适用于圣灵岛服务器项目
 * 支持各种屏幕尺寸的设备
 */

/* 基础重置和通用样式 */
* {
    box-sizing: border-box;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    -ms-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding: 0;
    font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
    overflow-x: hidden;
}

/* 容器和布局 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.container-fluid {
    width: 100%;
    padding: 0 15px;
}

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

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

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

/* 卡片组件 */
.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-bottom: 20px;
    overflow: hidden;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
    transform: translateY(-2px);
}

.card-header {
    padding: 20px;
    border-bottom: 1px solid #eee;
    background: #f8f9fa;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 15px 20px;
    border-top: 1px solid #eee;
    background: #f8f9fa;
}

/* 按钮组件 */
.btn {
    display: inline-block;
    padding: 12px 24px;
    font-size: 16px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    user-select: none;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
}

.btn-primary {
    background: linear-gradient(45deg, #667eea, #764ba2);
    color: white;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

.btn-secondary {
    background: #6c757d;
    color: white;
}

.btn-success {
    background: #28a745;
    color: white;
}

.btn-danger {
    background: #dc3545;
    color: white;
}

.btn-warning {
    background: #ffc107;
    color: #212529;
}

.btn-info {
    background: #17a2b8;
    color: white;
}

.btn-outline {
    background: transparent;
    border: 2px solid #667eea;
    color: #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 18px;
}

.btn-block {
    width: 100%;
    display: block;
}

/* 表单组件 */
.form-group {
    margin-bottom: 20px;
}

.form-label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: #333;
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    font-size: 16px;
    border: 2px solid #e9ecef;
    border-radius: 8px;
    background: #fff;
    transition: all 0.3s ease;
    -webkit-appearance: none;
    -moz-appearance: none;
    appearance: none;
}

.form-control:focus {
    outline: none;
    border-color: #667eea;
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-control:invalid {
    border-color: #dc3545;
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23343a40' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m1 6 7 7 7-7'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px 12px;
    padding-right: 40px;
}

/* 表格组件 */
.table-responsive {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 0;
}

.table th,
.table td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid #dee2e6;
}

.table th {
    background: #f8f9fa;
    font-weight: 600;
    color: #495057;
}

.table-striped tbody tr:nth-of-type(odd) {
    background: rgba(0, 0, 0, 0.05);
}

/* 导航组件 */
.navbar {
    background: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand {
    font-size: 24px;
    font-weight: 700;
    color: #667eea;
    text-decoration: none;
}

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

.navbar-nav .nav-item {
    margin: 0 10px;
}

.navbar-nav .nav-link {
    display: block;
    padding: 10px 15px;
    color: #333;
    text-decoration: none;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.navbar-nav .nav-link:hover {
    background: #f8f9fa;
    color: #667eea;
}

/* 分页组件 */
.pagination {
    display: flex;
    justify-content: center;
    list-style: none;
    margin: 20px 0;
    padding: 0;
}

.pagination .page-item {
    margin: 0 5px;
}

.pagination .page-link {
    display: block;
    padding: 8px 16px;
    color: #667eea;
    text-decoration: none;
    border: 1px solid #dee2e6;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.pagination .page-link:hover {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination .page-item.active .page-link {
    background: #667eea;
    color: white;
    border-color: #667eea;
}

.pagination .page-item.disabled .page-link {
    color: #6c757d;
    background: #f8f9fa;
    border-color: #dee2e6;
    cursor: not-allowed;
}

/* 消息提示组件 */
.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border: 1px solid transparent;
    border-radius: 8px;
    font-weight: 500;
}

.alert-success {
    color: #155724;
    background: #d4edda;
    border-color: #c3e6cb;
}

.alert-danger {
    color: #721c24;
    background: #f8d7da;
    border-color: #f5c6cb;
}

.alert-warning {
    color: #856404;
    background: #fff3cd;
    border-color: #ffeaa7;
}

.alert-info {
    color: #0c5460;
    background: #d1ecf1;
    border-color: #bee5eb;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid #667eea;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* 响应式断点 */
/* 超小屏幕 (手机, < 576px) */
@media (max-width: 575.98px) {
    .container {
        padding: 0 10px;
    }
    
    .col-xs-12 { flex: 0 0 100%; max-width: 100%; }
    .col-xs-6 { flex: 0 0 50%; max-width: 50%; }
    
    .btn {
        padding: 10px 20px;
        font-size: 14px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .table {
        font-size: 14px;
    }
    
    .table th,
    .table td {
        padding: 8px;
    }
    
    .navbar-nav {
        flex-direction: column;
        width: 100%;
    }
    
    .navbar-nav .nav-item {
        margin: 5px 0;
    }
    
    .pagination {
        flex-wrap: wrap;
    }
    
    .pagination .page-item {
        margin: 2px;
    }
    
    .pagination .page-link {
        padding: 6px 12px;
        font-size: 14px;
    }
}

/* 小屏幕 (平板, ≥ 576px) */
@media (min-width: 576px) and (max-width: 767.98px) {
    .col-sm-12 { flex: 0 0 100%; max-width: 100%; }
    .col-sm-6 { flex: 0 0 50%; max-width: 50%; }
    .col-sm-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-sm-3 { flex: 0 0 25%; max-width: 25%; }
}

/* 中等屏幕 (桌面, ≥ 768px) */
@media (min-width: 768px) and (max-width: 991.98px) {
    .col-md-12 { flex: 0 0 100%; max-width: 100%; }
    .col-md-6 { flex: 0 0 50%; max-width: 50%; }
    .col-md-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-md-3 { flex: 0 0 25%; max-width: 25%; }
    .col-md-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
}

/* 大屏幕 (桌面, ≥ 992px) */
@media (min-width: 992px) and (max-width: 1199.98px) {
    .col-lg-12 { flex: 0 0 100%; max-width: 100%; }
    .col-lg-6 { flex: 0 0 50%; max-width: 50%; }
    .col-lg-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-lg-3 { flex: 0 0 25%; max-width: 25%; }
    .col-lg-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
}

/* 超大屏幕 (桌面, ≥ 1200px) */
@media (min-width: 1200px) {
    .col-xl-12 { flex: 0 0 100%; max-width: 100%; }
    .col-xl-6 { flex: 0 0 50%; max-width: 50%; }
    .col-xl-4 { flex: 0 0 33.333333%; max-width: 33.333333%; }
    .col-xl-3 { flex: 0 0 25%; max-width: 25%; }
    .col-xl-2 { flex: 0 0 16.666667%; max-width: 16.666667%; }
}

/* 移动端特殊优化 */
@media (max-width: 767.98px) {
    /* 隐藏桌面端元素 */
    .d-none-mobile {
        display: none !important;
    }
    
    /* 显示移动端元素 */
    .d-mobile {
        display: block !important;
    }
    
    /* 移动端导航 */
    .mobile-nav {
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        background: #fff;
        box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.1);
        z-index: 1000;
        display: flex;
        justify-content: space-around;
        padding: 10px 0;
    }
    
    .mobile-nav-item {
        display: flex;
        flex-direction: column;
        align-items: center;
        text-decoration: none;
        color: #666;
        font-size: 12px;
        padding: 5px;
        transition: color 0.3s ease;
    }
    
    .mobile-nav-item:hover,
    .mobile-nav-item.active {
        color: #667eea;
    }
    
    .mobile-nav-item i {
        font-size: 20px;
        margin-bottom: 4px;
    }
    
    /* 移动端卡片 */
    .mobile-card {
        margin-bottom: 15px;
        border-radius: 8px;
    }
    
    .mobile-card .card-body {
        padding: 15px;
    }
    
    /* 移动端按钮组 */
    .btn-group-mobile {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }
    
    .btn-group-mobile .btn {
        width: 100%;
        margin: 0;
    }
    
    /* 移动端表格 */
    .table-mobile {
        font-size: 14px;
    }
    
    .table-mobile th,
    .table-mobile td {
        padding: 8px 4px;
        white-space: nowrap;
    }
    
    /* 移动端表单 */
    .form-mobile .form-control {
        font-size: 16px; /* 防止iOS缩放 */
        padding: 12px;
    }
    
    .form-mobile .form-label {
        font-size: 14px;
        margin-bottom: 6px;
    }
    
    /* 移动端图片 */
    .img-mobile {
        max-width: 100%;
        height: auto;
        border-radius: 8px;
    }
    
    /* 移动端间距 */
    .mobile-padding {
        padding: 15px;
    }
    
    .mobile-margin {
        margin: 15px 0;
    }
}

/* 桌面端特殊优化 */
@media (min-width: 768px) {
    /* 隐藏移动端元素 */
    .d-mobile {
        display: none !important;
    }
    
    /* 显示桌面端元素 */
    .d-none-mobile {
        display: block !important;
    }
}

/* 打印样式 */
@media print {
    .no-print {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .btn {
        display: none;
    }
}

/* 高对比度模式 */
@media (prefers-contrast: high) {
    .card {
        border: 2px solid #000;
    }
    
    .btn {
        border: 2px solid #000;
    }
    
    .form-control {
        border: 2px solid #000;
    }
}

/* 减少动画模式 */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}