:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #3f37c9;
    --success: #06d6a0;
    --success-dark: #05c292;
    --dark: #1d3557;
    --light: #f8f9fa;
    --gray: #6c757d;
    --gray-light: #e9ecef;
    --danger: #ef476f;
    --warning: #ffd166;
    --info: #118ab2;
    --border-radius: 16px;
    --border-radius-sm: 10px;
    --box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --box-shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --panel-gap: 24px;
    --dashboard-bg: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --panel-bg: #ffffff;
    --text-color: #2d3748;
    --text-muted: #718096;
    --border-color: #e2e8f0;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: var(--dashboard-bg);
    background-attachment: fixed;
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    padding: 0;
    overflow-x: hidden;
}

.dashboard-container {
    max-width: 1800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* 仪表盘头部 */
.dashboard-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    color: var(--text-color);
    padding: 24px 32px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    z-index: 100;
    position: sticky;
    top: 0;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo i {
    font-size: 2.2rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 700;
    margin: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1rem;
    color: var(--text-muted);
    text-align: center;
    margin: 0;
    font-weight: 400;
}

.header-actions {
    display: flex;
    gap: 12px;
}

/* 仪表盘主要内容区域 */
.dashboard-main {
    display: grid;
    grid-template-columns: 1fr 1.2fr 1fr;
    gap: var(--panel-gap);
    padding: 32px;
    flex: 1;
    min-height: 0;
}

/* 仪表盘面板 */
.dashboard-panel {
    background: var(--panel-bg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.dashboard-panel:hover {
    box-shadow: var(--box-shadow-hover);
    transform: translateY(-4px);
}

.panel-header {
    padding: 20px 24px;
    border-bottom: 2px solid var(--gray-light);
    background: linear-gradient(to right, #f8fafc, #ffffff);
}

.panel-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
    margin: 0 0 6px 0;
    display: flex;
    align-items: center;
    gap: 10px;
}

.panel-header h2 i {
    color: var(--primary);
}

.panel-header p {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin: 0;
}

.stats {
    display: flex;
    align-items: center;
}

/* 面板内容区域 */
.panel-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.stat-card {
    background: linear-gradient(135deg, #f0f9ff 0%, #e0f2fe 100%);
    border-radius: var(--border-radius-sm);
    padding: 20px 16px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    transition: var(--transition);
    border: 1px solid rgba(67, 97, 238, 0.1);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 6px;
    line-height: 1;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

textarea {
    width: 100%;
    padding: 16px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    transition: var(--transition);
    resize: vertical;
    min-height: 180px;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    flex: 1;
    background: #fafbfc;
    line-height: 1.6;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.15);
    background: #ffffff;
}

.actions {
    display: flex;
    gap: 12px;
    margin-top: auto;
}

.btn {
    flex: 1;
    padding: 14px 20px;
    border: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    box-shadow: 0 4px 14px rgba(67, 97, 238, 0.3);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(67, 97, 238, 0.4);
}

.btn-success {
    background: linear-gradient(135deg, var(--success), var(--info));
    color: white;
    box-shadow: 0 4px 14px rgba(6, 214, 160, 0.3);
}

.btn-success:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--success-dark), var(--success));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(6, 214, 160, 0.4);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
    font-weight: 600;
}

.btn-outline:hover:not(:disabled) {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning), #ffb703);
    color: #1a1a1a;
    box-shadow: 0 4px 14px rgba(255, 209, 102, 0.3);
}

.btn-warning:hover:not(:disabled) {
    background: linear-gradient(135deg, #ffb703, var(--warning));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 209, 102, 0.4);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.contact-preview {
    flex: 1;
    min-height: 200px;
    max-height: 300px;
    overflow-y: auto;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: 16px;
    background: linear-gradient(to bottom, #fafbfc, #ffffff);
    margin-bottom: 0;
    scroll-behavior: smooth;
}

.contact-preview::-webkit-scrollbar {
    width: 8px;
}

.contact-preview::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 4px;
}

.contact-preview::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

.contact-preview::-webkit-scrollbar-thumb:hover {
    background: var(--primary-dark);
}

.contact-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 12px;
    border-bottom: 1px solid var(--gray-light);
    transition: var(--transition);
    border-radius: 8px;
}

.contact-item:hover {
    background: linear-gradient(135deg, rgba(67, 97, 238, 0.05), rgba(63, 55, 201, 0.05));
    transform: translateX(4px);
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-info {
    display: flex;
    align-items: center;
    gap: 14px;
}

.avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--success));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 2px 8px rgba(67, 97, 238, 0.3);
    flex-shrink: 0;
}

.contact-details h4 {
    margin: 0 0 4px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--dark);
}

.contact-details p {
    margin: 0;
    color: var(--text-muted);
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-muted);
    text-align: center;
    padding: 40px 20px;
}

.empty-state i {
    font-size: 4rem;
    margin-bottom: 20px;
    opacity: 0.2;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.empty-state p {
    font-size: 1.1rem;
    font-weight: 500;
}

/* 仪表盘底部 */
.dashboard-footer {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 24px;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.notification {
    position: fixed;
    top: 100px;
    right: 32px;
    padding: 16px 28px;
    border-radius: var(--border-radius-sm);
    color: white;
    font-weight: 600;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.15);
    z-index: 1000;
    display: flex;
    align-items: center;
    gap: 12px;
    transform: translateX(400px);
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.notification.show {
    transform: translateX(0);
}

.notification.success {
    background: linear-gradient(135deg, var(--success), var(--info));
}

.notification.error {
    background: linear-gradient(135deg, var(--danger), #d90429);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .dashboard-main {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto auto;
        gap: 24px;
        padding: 24px;
    }
    
    .dashboard-panel {
        min-height: 400px;
    }
    
    .contact-stats {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .header-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }
    
    .logo {
        justify-content: center;
    }
}

@media (max-width: 768px) {
    .dashboard-main {
        padding: 20px;
        gap: 20px;
    }
    
    .dashboard-header {
        padding: 20px;
    }
    
    .actions {
        flex-wrap: wrap;
    }
    
    .btn {
        min-width: calc(50% - 6px);
    }
    
    .header-actions {
        width: 100%;
        justify-content: center;
    }
    
    .panel-header {
        padding: 18px 20px;
    }
    
    .panel-content {
        padding: 20px;
    }
    
    .contact-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 12px;
    }
    
    .stat-card {
        padding: 16px 12px;
    }
    
    .stat-number {
        font-size: 1.6rem;
    }
    
    .notification {
        top: 80px;
        right: 20px;
        left: 20px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .dashboard-main {
        padding: 16px;
    }
    
    .dashboard-header {
        padding: 16px;
    }
    
    .logo h1 {
        font-size: 1.6rem;
    }
    
    .logo i {
        font-size: 1.8rem;
    }
    
    .subtitle {
        font-size: 0.9rem;
    }
    
    .contact-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 8px;
    }
    
    .stat-card {
        padding: 12px 8px;
    }
    
    .stat-number {
        font-size: 1.3rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    .btn {
        min-width: 100%;
        padding: 12px 16px;
        font-size: 0.9rem;
    }
    
    .panel-header h2 {
        font-size: 1.1rem;
    }
    
    .avatar {
        width: 38px;
        height: 38px;
        font-size: 0.9rem;
    }
}

/* 添加动画效果 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.dashboard-panel {
    animation: fadeInUp 0.5s ease-out forwards;
}

.dashboard-panel:nth-child(1) {
    animation-delay: 0.1s;
}

.dashboard-panel:nth-child(2) {
    animation-delay: 0.2s;
}

.dashboard-panel:nth-child(3) {
    animation-delay: 0.3s;
}

/* 按钮点击效果 */
.btn:active:not(:disabled) {
    transform: scale(0.98);
}

/* 输入框聚焦动画 */
textarea:focus + .actions .btn-primary {
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
}

/* 统计卡片脉冲效果 */
@keyframes pulse {
    0%, 100% {
        box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
    }
    50% {
        box-shadow: 0 4px 16px rgba(67, 97, 238, 0.15);
    }
}

.stat-card.update {
    animation: pulse 0.6s ease-in-out;
}