/* 全局样式 */
* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: -apple-system, "Segoe UI", "Microsoft YaHei", sans-serif;
    background: #f4f6f9;
    color: #333;
    line-height: 1.6;
    min-height: 100vh;
}

header {
    background: linear-gradient(135deg, #2c3e50, #4a6572);
    color: #fff;
    padding: 30px 40px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
}

header h1 { font-size: 26px; }
.subtitle { font-size: 13px; opacity: 0.75; }

main {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

/* 统计卡片 */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: #fff;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
    transition: transform 0.2s;
}

.stat-card:hover { transform: translateY(-3px); }
.stat-num { display: block; font-size: 28px; font-weight: 700; color: #2c3e50; }
.stat-label { font-size: 13px; color: #888; }

/* 工具栏 */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}

.search-form { display: flex; gap: 8px; flex: 1; max-width: 500px; }
.search-form input {
    flex: 1;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
}
.search-form input:focus { outline: none; border-color: #4a6572; }

/* 按钮 */
.btn {
    display: inline-block;
    padding: 10px 18px;
    background: #e0e0e0;
    color: #333;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    text-decoration: none;
    transition: background 0.2s;
}
.btn:hover { background: #d0d0d0; }
.btn-primary { background: #2c3e50; color: #fff; }
.btn-primary:hover { background: #1a252f; }
.btn-danger { background: #e74c3c; color: #fff; }
.btn-danger:hover { background: #c0392b; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-clear { background: #f39c12; color: #fff; }

/* 表格 */
.table-wrap {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

table { width: 100%; border-collapse: collapse; }
th, td { padding: 12px 16px; text-align: left; border-bottom: 1px solid #eee; font-size: 14px; }
th { background: #f8f9fb; font-weight: 600; color: #555; }
tbody tr:hover { background: #fafbfc; }
.empty { text-align: center; color: #999; padding: 40px 0; }

/* 状态徽章 */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}
.badge-available { background: #d4edda; color: #155724; }
.badge-in_use { background: #cce5ff; color: #004085; }
.badge-maintenance { background: #fff3cd; color: #856404; }

/* 表单卡片 */
.form-card {
    background: #fff;
    border-radius: 10px;
    padding: 30px;
    max-width: 600px;
    margin: 0 auto;
    box-shadow: 0 2px 8px rgba(0,0,0,0.06);
}

form label {
    display: block;
    margin-bottom: 16px;
    font-size: 14px;
    color: #555;
}

form input, form select {
    display: block;
    width: 100%;
    margin-top: 6px;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
}
form input:focus, form select:focus { outline: none; border-color: #4a6572; }

.modal-actions { display: flex; justify-content: flex-end; gap: 10px; margin-top: 20px; }

/* 弹窗 */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.modal.show { display: flex; }

.modal-content {
    background: #fff;
    padding: 30px;
    border-radius: 12px;
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}
.modal-content h2 { margin-bottom: 20px; color: #2c3e50; }

.actions { white-space: nowrap; }
.actions .btn { margin-right: 4px; }

@media (max-width: 768px) {
    header { padding: 20px; }
    .toolbar { flex-direction: column; align-items: stretch; }
    .search-form { max-width: 100%; }
    th, td { padding: 8px 10px; font-size: 13px; }
}