/* iOS风格蓝色 + 二次元风格 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-blue: #007AFF;
    --secondary-blue: #5AC8FA;
    --dark-blue: #0051D5;
    --light-blue: #E3F2FD;
    --accent-pink: #FF6B9D;
    --accent-purple: #AF52DE;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --card-shadow: 0 8px 32px rgba(0, 122, 255, 0.1);
    --border-radius: 16px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    background-attachment: fixed;
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: 0 2px 20px rgba(0, 122, 255, 0.1);
    padding: 1rem 2rem;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(0, 122, 255, 0.1);
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.navbar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

/* 汉堡菜单按钮 */
.navbar-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-around;
    width: 30px;
    height: 30px;
    background: transparent;
    border: none;
    cursor: pointer;
    padding: 0;
    z-index: 1001;
}

.navbar-toggle span {
    width: 100%;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 3px;
    transition: var(--transition);
    transform-origin: center;
}

.navbar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(8px, 8px);
}

.navbar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.navbar-nav {
    display: flex;
    list-style: none;
    gap: 1.5rem;
    align-items: center;
    margin: 0;
    padding: 0;
}

.navbar-nav a {
    color: #333;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 8px;
}

.navbar-nav a:hover {
    background: var(--light-blue);
    color: var(--primary-blue);
}

/* 容器 */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* 卡片 */
.card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    box-shadow: var(--card-shadow);
    padding: 2rem;
    margin-bottom: 2rem;
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.15);
}

.card-header {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 2px solid var(--light-blue);
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    font-size: 1rem;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: white;
    box-shadow: 0 4px 15px rgba(0, 122, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 122, 255, 0.4);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.9);
    color: var(--primary-blue);
    border: 2px solid var(--primary-blue);
}

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

.btn-danger {
    background: linear-gradient(135deg, #ff6b6b, #ee5a6f);
    color: white;
}

.btn-success {
    background: linear-gradient(135deg, #51cf66, #40c057);
    color: white;
}

/* 表单 */
.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: #555;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid #e0e0e0;
    border-radius: 12px;
    font-size: 1rem;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.9);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(0, 122, 255, 0.1);
}

.form-control:required {
    border-left: 4px solid var(--accent-pink);
}

/* 表格 */
.table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 12px;
    overflow: hidden;
}

.table thead {
    background: linear-gradient(135deg, var(--primary-blue), var(--secondary-blue));
    color: white;
}

.table th,
.table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.table tbody tr:hover {
    background: var(--light-blue);
}

.table tbody tr:last-child td {
    border-bottom: none;
}

/* 仪表盘统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    box-shadow: var(--card-shadow);
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 122, 255, 0.2);
}

.stat-value {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: #666;
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

/* 公告栏 */
.announcement-item {
    padding: 1rem;
    margin-bottom: 1rem;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 12px;
    border-left: 4px solid var(--primary-blue);
    transition: var(--transition);
}

.announcement-item:hover {
    background: rgba(255, 255, 255, 1);
    transform: translateX(4px);
}

.announcement-title {
    font-weight: 600;
    color: var(--primary-blue);
    margin-bottom: 0.5rem;
}

.announcement-date {
    color: #999;
    font-size: 0.85rem;
}

/* 搜索框 */
.search-box {
    position: relative;
    margin-bottom: 2rem;
}

.search-box input {
    padding-left: 3rem;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: #999;
}

/* 标签 */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-success {
    background: rgba(81, 207, 102, 0.2);
    color: #51cf66;
}

.badge-warning {
    background: rgba(255, 193, 7, 0.2);
    color: #ffc107;
}

.badge-danger {
    background: rgba(255, 107, 107, 0.2);
    color: #ff6b6b;
}

.badge-info {
    background: rgba(0, 122, 255, 0.2);
    color: var(--primary-blue);
}

/* 分页 */
.pagination {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    margin-top: 2rem;
}

.pagination a,
.pagination span {
    padding: 0.5rem 1rem;
    border-radius: 8px;
    text-decoration: none;
    color: var(--primary-blue);
    background: white;
    border: 2px solid var(--primary-blue);
    transition: var(--transition);
}

.pagination a:hover,
.pagination .active {
    background: var(--primary-blue);
    color: white;
}

/* 响应式 */
@media (max-width: 768px) {
    /* 容器和间距 */
    .container {
        padding: 1rem;
    }
    
    /* 导航栏 */
    .navbar {
        padding: 1rem;
    }
    
    .navbar-container {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .navbar-header {
        width: 100%;
        display: flex;
        justify-content: space-between;
        align-items: center;
    }
    
    .navbar-brand {
        font-size: 1.2rem;
        margin-bottom: 0;
    }
    
    /* 显示汉堡菜单按钮 */
    .navbar-toggle {
        display: flex;
    }
    
    /* 移动端菜单默认隐藏 */
    .navbar-nav {
        display: none;
        flex-direction: column;
        gap: 0.5rem;
        width: 100%;
        margin-top: 1rem;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transition: max-height 0.3s ease, opacity 0.3s ease, margin-top 0.3s ease;
    }
    
    /* 菜单展开状态 */
    .navbar-nav.active {
        display: flex;
        max-height: 500px;
        opacity: 1;
    }
    
    .navbar-nav li {
        width: 100%;
    }
    
    .navbar-nav a {
        display: block;
        padding: 0.75rem 1rem;
        width: 100%;
        text-align: left;
    }
    
    /* 卡片 */
    .card {
        padding: 1.5rem;
        margin-bottom: 1.5rem;
    }
    
    .card-header {
        font-size: 1.2rem;
        margin-bottom: 1rem;
    }
    
    /* 统计卡片网格 */
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-card {
        padding: 1.25rem;
    }
    
    .stat-value {
        font-size: 2rem;
    }
    
    /* 表格 - 移动端横向滚动 */
    .card {
        overflow-x: auto;
    }
    
    .table {
        min-width: 600px; /* 确保表格有最小宽度，超出时可滚动 */
        width: 100%;
    }
    
    .table th,
    .table td {
        padding: 0.75rem 0.5rem;
        font-size: 0.9rem;
    }
    
    /* 表单 */
    .form-group {
        margin-bottom: 1.25rem;
    }
    
    .form-control {
        padding: 0.875rem 1rem;
        font-size: 16px; /* 防止iOS自动缩放 */
    }
    
    /* 按钮 */
    .btn {
        padding: 0.875rem 1.25rem;
        font-size: 1rem;
        min-height: 44px; /* 触摸友好 */
    }
    
    /* 表单中的按钮默认全宽 */
    form .btn,
    .card .btn:only-child {
        width: 100%;
    }
    
    /* 搜索框 */
    .search-box {
        margin-bottom: 1.5rem;
    }
    
    /* 分页 */
    .pagination {
        flex-wrap: wrap;
        gap: 0.25rem;
    }
    
    .pagination a,
    .pagination span {
        padding: 0.5rem 0.75rem;
        font-size: 0.9rem;
    }
    
    /* 公告项 */
    .announcement-item {
        padding: 0.875rem;
        margin-bottom: 0.875rem;
    }
    
    /* 提示消息 */
    .alert {
        padding: 0.875rem 1rem;
        font-size: 0.9rem;
    }
    
    /* 标签 */
    .badge {
        padding: 0.25rem 0.5rem;
        font-size: 0.8rem;
    }
}

/* 超小屏幕（手机竖屏） */
@media (max-width: 480px) {
    .container {
        padding: 0.75rem;
    }
    
    .navbar {
        padding: 0.75rem;
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
    
    .card {
        padding: 1rem;
        border-radius: 12px;
    }
    
    .card-header {
        font-size: 1.1rem;
    }
    
    .stat-value {
        font-size: 1.75rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem 0.25rem;
        font-size: 0.85rem;
    }
    
    .btn {
        padding: 0.75rem 1rem;
        font-size: 0.95rem;
    }
}

/* 二次元风格装饰 */
.anime-decoration {
    position: fixed;
    width: 200px;
    height: 200px;
    opacity: 0.1;
    pointer-events: none;
    z-index: 0;
}

/* 加载动画 */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(0, 122, 255, 0.3);
    border-radius: 50%;
    border-top-color: var(--primary-blue);
    animation: spin 1s ease-in-out infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 提示消息 */
.alert {
    padding: 1rem 1.5rem;
    border-radius: 12px;
    margin-bottom: 1rem;
    border-left: 4px solid;
}

.alert-success {
    background: rgba(81, 207, 102, 0.1);
    border-color: #51cf66;
    color: #2b8a3e;
}

.alert-error {
    background: rgba(255, 107, 107, 0.1);
    border-color: #ff6b6b;
    color: #c92a2a;
}

.alert-info {
    background: rgba(0, 122, 255, 0.1);
    border-color: var(--primary-blue);
    color: var(--dark-blue);
}