:root {
    --primary: #1a3a6c;
    --secondary: #2c5282;
    --accent: #4a6ee0;
    --light: #e0e7ff;
    --dark: #0f1f3d;
    --success: #27ae60;
    --warning: #e67e22;
    --danger: #e74c3c;
    --gray: #718096;
    --light-gray: #e2e8f0;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

body {
    background: linear-gradient(135deg, #e0e7ff 0%, #d1e0fc 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--dark);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.18);
    overflow: hidden;
}

header {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    padding: 25px 35px;
    position: relative;
    overflow: hidden;
}

header::before {
    content: "";
    position: absolute;
    top: -10px;
    left: -10px;
    right: -10px;
    bottom: -10px;
    background: linear-gradient(45deg, rgba(255,255,255,0.1) 0%, rgba(255,255,255,0) 100%);
    z-index: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: relative;
    z-index: 1;
}

.header-text h1 {
    font-size: 28px;
    margin-bottom: 8px;
    font-weight: 700;
    letter-spacing: 1px;
}

.header-text p {
    font-size: 17px;
    opacity: 0.9;
}

.header-actions {
    display: flex;
    gap: 15px;
}

.main-content {
    display: flex;
    min-height: 700px;
}

/* 构件侧边栏 */
.structure-sidebar {
    width: 320px;
    background: #f8fafc;
    border-right: 1px solid var(--light-gray);
    padding: 25px 0;
    display: flex;
    flex-direction: column;
}

.structure-header {
    padding: 0 25px 20px;
    border-bottom: 1px solid var(--light-gray);
}

.structure-header h2 {
    font-size: 20px;
    color: var(--primary);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.structure-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.form-group {
    display: flex;
    flex-direction: column;
}

.form-group label {
    font-weight: 600;
    margin-bottom: 8px;
    font-size: 14px;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-group input, .form-group select {
    padding: 12px 15px;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 15px;
}

.form-group input:focus, .form-group select:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 110, 224, 0.15);
}

.radio-group {
    display: flex;
    gap: 15px;
    margin-top: 5px;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.radio-item input[type="radio"] {
    width: auto;
}

.structure-list {
    flex: 1;
    overflow-y: auto;
    padding: 0 15px;
}

.structure-item {
    padding: 15px;
    margin: 10px 0;
    background: white;
    border-radius: 10px;
    border: 1px solid var(--light-gray);
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}

.structure-item.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(74, 110, 224, 0.15);
}

.structure-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.structure-name {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
    display: flex;
    align-items: center;
}

.structure-name i {
    margin-right: 10px;
    color: var(--accent);
}

.structure-info {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    font-size: 13px;
    color: var(--gray);
    margin-top: 10px;
}

.info-item {
    display: flex;
    align-items: center;
    gap: 5px;
}

.info-item i {
    color: var(--accent);
    font-size: 12px;
}

.structure-actions {
    position: absolute;
    top: 15px;
    right: 15px;
    display: flex;
    gap: 8px;
}

.action-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--light);
    color: var(--accent);
    font-size: 14px;
    cursor: pointer;
    transition: all 0.3s;
}

.action-btn:hover {
    background: var(--accent);
    color: white;
}

.add-structure-btn {
    margin: 20px 25px 0;
    padding: 12px;
    background: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.3s;
}

.add-structure-btn:hover {
    background: var(--primary);
}

/* 主内容区域 */
.main-panel {
    flex: 1;
    padding: 30px;
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 25px;
}

.current-structure {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.panel-actions {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    border: none;
    transition: all 0.3s;
}

.btn-primary {
    background: var(--accent);
    color: white;
}

.btn-secondary {
    background: var(--light);
    color: var(--accent);
}

.btn-success {
    background: var(--success);
    color: white;
}

.btn-warning {
    background: var(--warning);
    color: white;
}

.btn-danger {
    background: var(--danger);
    color: white;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0,0,0,0.1);
}

.card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 25px;
    border: 1px solid var(--light-gray);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-title {
    font-size: 20px;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title i {
    color: var(--accent);
}

.section-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 15px;
}

.section-item {
    background: #f8fafc;
    border-radius: 10px;
    padding: 20px;
    border: 1px solid var(--light-gray);
    cursor: pointer;
    transition: all 0.3s;
}

.section-item:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
}

.section-item.active {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(74, 110, 224, 0.15);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.section-name {
    font-weight: 600;
    color: var(--dark);
}

.section-info {
    font-size: 14px;
    color: var(--gray);
}

.section-result {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    color: var(--primary);
    margin: 10px 0;
}

.section-conclusion {
    text-align: center;
    padding: 8px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 600;
}

.conclusion-valid {
    background: rgba(39, 174, 96, 0.1);
    color: var(--success);
    border: 1px solid rgba(39, 174, 96, 0.3);
}

.conclusion-invalid {
    background: rgba(231, 76, 60, 0.1);
    color: var(--danger);
    border: 1px solid rgba(231, 76, 60, 0.3);
}

/* 测区详情 */
.section-detail {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.detail-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.detail-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--primary);
}

.detail-actions {
    display: flex;
    gap: 15px;
}

.detail-content {
    display: flex;
    flex-direction: column;
    flex: 1;
}

.detail-params {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.param-group {
    display: flex;
    flex-direction: column;
}

.param-group label {
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--dark);
}

.param-group select, .param-group input {
    padding: 12px 15px;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 16px;
}

.param-group select:focus, .param-group input:focus {
    border-color: var(--accent);
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 110, 224, 0.15);
}

.rebound-grid {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: 15px;
    margin-bottom: 25px;
}

.rebound-item {
    display: flex;
    flex-direction: column;
}

.rebound-item label {
    font-size: 14px;
    margin-bottom: 8px;
    text-align: center;
    color: var(--gray);
}

.rebound-item input {
    padding: 12px 5px;
    text-align: center;
    border: 2px solid var(--light-gray);
    border-radius: 8px;
    font-size: 16px;
}

.result-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-top: auto;
}

.result-card {
    background: #f8fafc;
    border-radius: 12px;
    padding: 25px;
    text-align: center;
    border: 1px solid var(--light-gray);
}

.result-card h3 {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 15px;
}

.result-value {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
    margin: 10px 0;
}

.result-conclusion {
    font-size: 18px;
    font-weight: 700;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
}

/* 构件统计信息 */
.stats-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 25px;
}

.stat-card {
    background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 100%);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
    border: 1px solid #90caf9;
}

.stat-card h3 {
    font-size: 16px;
    color: #0d47a1;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.stat-value {
    font-size: 32px;
    font-weight: 800;
    color: #1a237e;
    margin: 10px 0;
}

.stat-note {
    font-size: 14px;
    color: #546e7a;
    margin-top: 10px;
    font-style: italic;
}

.inference-card {
    background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
    border: 1px solid #81c784;
    grid-column: span 3;
}

.inference-card h3 {
    color: #2e7d32;
}

.inference-card .stat-value {
    color: #1b5e20;
}

footer {
    text-align: center;
    padding: 25px;
    color: var(--gray);
    font-size: 15px;
    border-top: 1px solid var(--light-gray);
    background: #f8fafc;
}

/* 编辑构件模态框 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.5);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: white;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.3);
    width: 500px;
    max-width: 90%;
    overflow: hidden;
}

.modal-header {
    background: var(--primary);
    color: white;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 20px;
}

.close-modal {
    background: none;
    border: none;
    color: white;
    font-size: 24px;
    cursor: pointer;
}

.modal-body {
    padding: 25px;
}

.modal-form {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: 15px;
    padding: 15px 25px;
    border-top: 1px solid var(--light-gray);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .section-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .rebound-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}

@media (max-width: 992px) {
    .main-content {
        flex-direction: column;
    }
    
    .structure-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--light-gray);
    }
    
    .section-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-container {
        grid-template-columns: 1fr;
    }
    
    .inference-card {
        grid-column: span 1;
    }
}

@media (max-width: 768px) {
    .section-grid {
        grid-template-columns: 1fr;
    }
    
    .rebound-grid {
        grid-template-columns: repeat(4, 1fr);
    }
    
    .detail-params {
        grid-template-columns: 1fr;
    }
    
    .result-container {
        grid-template-columns: 1fr;
    }
    
    .header-content {
        flex-direction: column;
        gap: 20px;
    }
}

@media (max-width: 576px) {
    .rebound-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .panel-actions {
        flex-wrap: wrap;
    }
}