/* 全局样式 */
body {
    background-color: #f8f9fa;
    font-family: "Microsoft YaHei", "Segoe UI", sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

footer {
    margin-top: auto;
}

/* 卡片样式 */
.card {
    border: none;
    border-radius: 12px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.08);
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.12);
}

/* 统计卡片 */
.stat-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1rem;
}

.stat-card.success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.stat-card.warning {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.stat-card.info {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: bold;
    margin: 0;
}

.stat-label {
    opacity: 0.9;
    margin: 0;
    font-size: 0.9rem;
}

/* 进度条 */
.progress {
    height: 10px;
    border-radius: 5px;
}

.progress-bar {
    border-radius: 5px;
    transition: width 0.5s ease;
}

/* 视频播放器 */
.video-container {
    position: relative;
    width: 100%;
    background: #000;
    border-radius: 8px;
    overflow: hidden;
}

.video-container video {
    width: 100%;
    max-height: 70vh;
}

/* PDF预览 */
.pdf-preview {
    width: 100%;
    height: 80vh;
    border: 1px solid #dee2e6;
    border-radius: 8px;
}

/* 材料卡片 */
.material-card {
    cursor: pointer;
    transition: all 0.3s ease;
}

.material-card:hover {
    transform: translateY(-4px);
}

/* 表格样式 */
.table th {
    border-top: none;
    background-color: #f8f9fa;
    font-weight: 600;
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #5a6fd6 0%, #6a4190 100%);
    transform: translateY(-1px);
}

/* 登录页面 */
.navbar-brand {
    font-weight: bold;
    font-size: 1.3rem;
}

/* 徽章 */
.badge {
    padding: 0.4em 0.8em;
}

/* 动画 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.fade-in {
    animation: fadeIn 0.4s ease;
}

/* 响应式 */
@media (max-width: 768px) {
    .stat-number {
        font-size: 1.8rem;
    }

    .display-4 {
        font-size: 2rem;
    }

    /* 导航栏优化 */
    .navbar-brand {
        font-size: 1.1rem;
    }

    .navbar .container {
        padding: 0 0.5rem;
    }

    /* 内容区域紧凑 */
    .container {
        padding: 0 0.75rem;
    }

    /* 统计卡片紧凑 */
    .stat-card {
        padding: 1rem;
    }

    /* 视频播放器全宽 */
    .video-container video {
        max-height: 50vh;
    }

    /* PDF预览全屏 */
    .pdf-preview {
        height: 70vh;
    }

    /* 表格横向滚动优化 */
    .table-responsive {
        -webkit-overflow-scrolling: touch;
    }

    /* 卡片间距缩小 */
    .card-body {
        padding: 1rem;
    }

    /* 任务卡片列表模式 */
    .task-card {
        border-left: 4px solid #667eea;
    }

    /* 按钮全宽 */
    .btn-lg {
        font-size: 1rem;
        padding: 0.6rem 1rem;
    }

    /* 登录页居中 */
    .row.justify-content-center .col-md-6 {
        max-width: 100%;
    }

    /* 隐藏桌面端专有列 */
    .hide-mobile {
        display: none !important;
    }
}

/* 钉钉内置浏览器特殊适配 */
@media (max-width: 480px) {
    body {
        -webkit-text-size-adjust: 100%;
    }

    .stat-card {
        padding: 0.75rem;
        border-radius: 8px;
    }

    .stat-number {
        font-size: 1.5rem;
    }

    .stat-label {
        font-size: 0.8rem;
    }

    .navbar-brand {
        font-size: 1rem;
    }

    /* 进度条加粗，方便触摸 */
    .progress {
        height: 12px;
    }
}