/* 管理后台样式 - 增强版现代化设计 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: #f1f5f9;
    color: #334155;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 全局过渡效果 */
* {
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ==================== 登录页面 ==================== */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, #1e293b 0%, #0f172a 50%, #3b82f6 100%);
    position: relative;
    overflow: hidden;
}

.login-container::before {
    content: '';
    position: absolute;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.3) 0%, transparent 70%);
    top: -300px;
    right: -300px;
    animation: float 20s ease-in-out infinite;
}

.login-container::after {
    content: '';
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(139, 92, 246, 0.2) 0%, transparent 70%);
    bottom: -200px;
    left: -200px;
    animation: float 25s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    33% { transform: translate(30px, -30px) rotate(5deg); }
    66% { transform: translate(-20px, 20px) rotate(-5deg); }
}

.login-box {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    padding: 56px;
    border-radius: 24px;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.2) inset;
    width: 100%;
    max-width: 480px;
    position: relative;
    z-index: 10;
    animation: slideUp 0.6s ease-out;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-box h1 {
    text-align: center;
    color: #1e293b;
    margin-bottom: 40px;
    font-size: 32px;
    font-weight: 700;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ==================== 表单样式 ==================== */
.form-group {
    margin-bottom: 28px;
    position: relative;
}

.form-group label {
    display: block;
    margin-bottom: 10px;
    color: #475569;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.3px;
}

.form-group input {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 15px;
    background-color: #f8fafc;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    position: relative;
}

.form-group input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 
        0 0 0 4px rgba(59, 130, 246, 0.1),
        0 0 0 1px #3b82f6;
    background-color: white;
    transform: translateY(-1px);
}

.form-group input::placeholder {
    color: #94a3b8;
    font-weight: 400;
}

/* ==================== 按钮样式 ==================== */
.btn {
    width: 100%;
    padding: 16px 32px;
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    letter-spacing: 0.5px;
    box-shadow: 
        0 4px 6px -1px rgba(59, 130, 246, 0.4),
        0 2px 4px -1px rgba(59, 130, 246, 0.2);
    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: left 0.5s;
}

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

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 
        0 8px 12px -1px rgba(59, 130, 246, 0.5),
        0 4px 6px -1px rgba(59, 130, 246, 0.3);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 
        0 2px 4px -1px rgba(59, 130, 246, 0.3),
        0 1px 2px -1px rgba(59, 130, 246, 0.2);
}

.btn-sm {
    padding: 10px 20px;
    font-size: 13px;
    border-radius: 10px;
    text-decoration: none;
    display: inline-block;
    font-weight: 600;
    letter-spacing: 0.3px;
}

.btn-primary {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
}

.btn-danger {
    background: linear-gradient(135deg, #ef4444 0%, #dc2626 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: linear-gradient(135deg, #dc2626 0%, #b91c1c 100%);
}

.btn-success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
    box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
}

.btn-success:hover {
    background: linear-gradient(135deg, #059669 0%, #047857 100%);
}

.btn-outline {
    background: transparent;
    border: 2px solid #e2e8f0;
    color: #64748b;
    box-shadow: none;
}

.btn-outline:hover {
    border-color: #3b82f6;
    color: #3b82f6;
    background: rgba(59, 130, 246, 0.05);
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.1);
}

/* ==================== 提示信息 ==================== */
.alert {
    padding: 16px 20px;
    border-radius: 12px;
    margin-bottom: 24px;
    border-left: 4px solid;
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 500;
    font-size: 14px;
    animation: alertSlideIn 0.3s ease-out;
}

@keyframes alertSlideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.alert-error {
    background: linear-gradient(135deg, #fef2f2 0%, #fee2e2 100%);
    color: #b91c1c;
    border-left-color: #ef4444;
}

.alert-success {
    background: linear-gradient(135deg, #ecfdf5 0%, #d1fae5 100%);
    color: #059669;
    border-left-color: #10b981;
}

/* ==================== 管理后台主布局 ==================== */
.admin-layout {
    display: flex;
    min-height: 100vh;
    background-color: #f1f5f9;
}

/* ==================== 侧边栏 ==================== */
.sidebar {
    width: 280px;
    background: linear-gradient(180deg, #0f172a 0%, #1e293b 100%);
    color: white;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    box-shadow: 
        4px 0 24px rgba(0, 0, 0, 0.15),
        inset 0 1px 0 rgba(255, 255, 255, 0.1);
    z-index: 1000;
}

.sidebar::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.sidebar-header {
    padding: 40px 24px 32px;
    text-align: center;
    position: relative;
}

.sidebar-header::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 24px;
    right: 24px;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.1), transparent);
}

.sidebar-header h2 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

.sidebar-header p {
    font-size: 13px;
    color: #94a3b8;
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.sidebar-nav {
    list-style: none;
    padding: 24px 0;
}

.sidebar-nav li {
    margin-bottom: 4px;
}

.sidebar-nav a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 24px;
    color: #cbd5e1;
    text-decoration: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 0 12px 12px 0;
    margin: 0 12px;
    font-weight: 500;
    font-size: 14px;
    letter-spacing: 0.2px;
    position: relative;
    overflow: hidden;
}

.sidebar-nav a::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 0;
    background: linear-gradient(90deg, rgba(59, 130, 246, 0.2), transparent);
    transition: width 0.3s ease;
}

.sidebar-nav a:hover::before,
.sidebar-nav a.active::before {
    width: 100%;
}

.sidebar-nav a:hover,
.sidebar-nav a.active {
    background: rgba(59, 130, 246, 0.12);
    color: #3b82f6;
    border-left: 3px solid #3b82f6;
    margin-left: 0;
    padding-left: 27px;
}

/* ==================== 主内容区 ==================== */
.main-content {
    flex: 1;
    margin-left: 280px;
    min-height: 100vh;
    background: linear-gradient(135deg, #f1f5f9 0%, #e2e8f0 100%);
}

/* ==================== 顶部栏 ==================== */
.top-bar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 24px 32px;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 2px 4px -1px rgba(0, 0, 0, 0.03);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(226, 232, 240, 0.5);
}

.top-bar h1 {
    font-size: 22px;
    font-weight: 700;
    color: #0f172a;
    margin: 0;
    letter-spacing: -0.3px;
}

/* ==================== 搜索栏 ==================== */
.search-container {
    position: relative;
    flex: 1;
    max-width: 400px;
    margin: 0 32px;
}

.search-input {
    width: 100%;
    padding: 12px 48px 12px 20px;
    border: 2px solid #e2e8f0;
    border-radius: 12px;
    font-size: 14px;
    background-color: #f8fafc;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.search-input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
    background-color: white;
    transform: translateY(-1px);
}

.search-icon {
    position: absolute;
    right: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: #94a3b8;
    font-size: 18px;
}

/* ==================== 用户信息 ==================== */
.user-info {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 16px;
    border-radius: 12px;
    background: rgba(255, 255, 255, 0.5);
    transition: all 0.2s ease;
}

.user-info:hover {
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.user-avatar {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 16px;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.3);
}

.user-details {
    text-align: right;
}

.user-name {
    font-weight: 600;
    font-size: 14px;
    color: #1e293b;
}

.user-role {
    font-size: 12px;
    color: #64748b;
    font-weight: 500;
}

/* ==================== 内容区域 ==================== */
.content-area {
    padding: 32px;
}

/* ==================== 卡片样式 ==================== */
.card {
    background: white;
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 24px;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 2px 4px -1px rgba(0, 0, 0, 0.03),
        0 0 0 1px rgba(226, 232, 240, 0.5) inset;
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6, #ec4899);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.card:hover::before {
    opacity: 1;
}

.card:hover {
    box-shadow: 
        0 10px 15px -3px rgba(0, 0, 0, 0.08),
        0 4px 6px -2px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
}

.card-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f1f5f9;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 20px;
    color: #1e293b;
    font-weight: 700;
    margin: 0;
    display: flex;
    align-items: center;
    gap: 10px;
    letter-spacing: -0.2px;
}

.card-body {
    color: #475569;
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}

.stat-card {
    background: white;
    padding: 32px;
    border-radius: 20px;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 2px 4px -1px rgba(0, 0, 0, 0.03),
        0 0 0 1px rgba(226, 232, 240, 0.5) inset;
    position: relative;
    overflow: hidden;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6 0%, #8b5cf6 100%);
}

.stat-card::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.05) 0%, transparent 70%);
    transition: all 0.5s ease;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: 
        0 12px 20px -3px rgba(0, 0, 0, 0.1),
        0 6px 10px -2px rgba(0, 0, 0, 0.05);
}

.stat-card:hover::after {
    top: 0;
    right: 0;
}

.stat-value {
    font-size: 40px;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 10px;
    line-height: 1.1;
    position: relative;
    z-index: 1;
}

.stat-label {
    color: #64748b;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: relative;
    z-index: 1;
}

.stat-change {
    font-size: 13px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    position: relative;
    z-index: 1;
}

.stat-change.positive {
    color: #10b981;
}

.stat-change.negative {
    color: #ef4444;
}

/* ==================== 表格样式 ==================== */
.table-responsive {
    overflow-x: auto;
    border-radius: 16px;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 2px 4px -1px rgba(0, 0, 0, 0.03);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: 16px;
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 18px 24px;
    text-align: left;
    border-bottom: 1px solid #f1f5f9;
}

.data-table th {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    color: #475569;
    font-weight: 700;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    position: sticky;
    top: 0;
}

.data-table tbody tr {
    transition: all 0.2s ease;
}

.data-table tbody tr:hover {
    background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
    transform: scale(1.005);
}

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

.data-table .actions {
    display: flex;
    gap: 10px;
    align-items: center;
}

/* ==================== 徽章样式 ==================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border-radius: 24px;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

.badge-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #059669;
}

.badge-warning {
    background: linear-gradient(135deg, #fef3c7 0%, #fde68a 100%);
    color: #d97706;
}

.badge-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #b91c1c;
}

.badge-info {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }
    
    .main-content {
        margin-left: 240px;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }
    
    .sidebar.active {
        transform: translateX(0);
        box-shadow: 4px 0 24px rgba(0, 0, 0, 0.2);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .top-bar {
        padding: 16px 20px;
        flex-wrap: wrap;
        gap: 12px;
    }
    
    .content-area {
        padding: 20px;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .search-container {
        margin: 0 16px;
        max-width: 100%;
        order: 3;
        flex-basis: 100%;
    }
    
    .login-box {
        padding: 40px 32px;
        margin: 20px;
    }
}

/* ==================== 加载动画 ==================== */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2.5px solid #f3f3f3;
    border-top: 2.5px solid #3b82f6;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==================== 模态窗口 ==================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    justify-content: center;
    align-items: center;
    animation: modalFadeIn 0.3s ease;
}

.modal.active {
    display: flex;
}

@keyframes modalFadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal-content {
    background: white;
    border-radius: 20px;
    padding: 36px;
    width: 90%;
    max-width: 600px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(226, 232, 240, 0.5) inset;
    animation: modalSlideUp 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes modalSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f1f5f9;
}

.modal-title {
    font-size: 22px;
    font-weight: 700;
    color: #1e293b;
    margin: 0;
    letter-spacing: -0.3px;
}

.modal-close {
    background: none;
    border: none;
    font-size: 28px;
    cursor: pointer;
    color: #94a3b8;
    padding: 0;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 10px;
    transition: all 0.2s ease;
}

.modal-close:hover {
    background: #f1f5f9;
    color: #64748b;
    transform: rotate(90deg);
}

/* ==================== 工具提示 ==================== */
.tooltip {
    position: relative;
    display: inline-block;
}

.tooltip .tooltip-text {
    visibility: hidden;
    width: 140px;
    background: linear-gradient(135deg, #1e293b 0%, #334155 100%);
    color: white;
    text-align: center;
    border-radius: 10px;
    padding: 12px;
    position: absolute;
    z-index: 1;
    bottom: 130%;
    left: 50%;
    margin-left: -70px;
    opacity: 0;
    transition: all 0.3s ease;
    font-size: 13px;
    font-weight: 500;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.tooltip .tooltip-text::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    margin-left: -6px;
    border-width: 6px;
    border-style: solid;
    border-color: #334155 transparent transparent transparent;
}

.tooltip:hover .tooltip-text {
    visibility: visible;
    opacity: 1;
    bottom: 115%;
}

/* ==================== 分割线 ==================== */
.divider {
    height: 2px;
    background: linear-gradient(90deg, transparent, #f1f5f9, transparent);
    margin: 28px 0;
}

/* ==================== 标签 ==================== */
.tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    margin-right: 10px;
    margin-bottom: 10px;
    letter-spacing: 0.3px;
    transition: all 0.2s ease;
    cursor: default;
}

.tag:hover {
    transform: translateY(-2px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.tag-primary {
    background: linear-gradient(135deg, #dbeafe 0%, #bfdbfe 100%);
    color: #1e40af;
}

.tag-secondary {
    background: linear-gradient(135deg, #e2e8f0 0%, #cbd5e1 100%);
    color: #475569;
}

.tag-success {
    background: linear-gradient(135deg, #d1fae5 0%, #a7f3d0 100%);
    color: #059669;
}

.tag-danger {
    background: linear-gradient(135deg, #fee2e2 0%, #fecaca 100%);
    color: #b91c1c;
}

/* ==================== 滚动条样式 ==================== */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f5f9;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, #cbd5e1 0%, #94a3b8 100%);
    border-radius: 10px;
    border: 2px solid #f1f5f9;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, #94a3b8 0%, #64748b 100%);
}

/* ==================== 加载覆盖层 ==================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.7);
    backdrop-filter: blur(8px);
    z-index: 2000;
    display: none;
    justify-content: center;
    align-items: center;
}

.loading-overlay.active {
    display: flex;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 4px solid rgba(255, 255, 255, 0.2);
    border-top-color: #3b82f6;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 24px;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.loading-text {
    color: white;
    font-size: 18px;
    font-weight: 600;
    text-align: center;
    letter-spacing: 0.5px;
}

.loading-progress {
    width: 240px;
    height: 6px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 10px;
    margin-top: 20px;
    overflow: hidden;
}

.loading-progress-bar {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #3b82f6 0%, #8b5cf6 50%, #ec4899 100%);
    border-radius: 10px;
    animation: progress 2s cubic-bezier(0.4, 0, 0.2, 1) infinite;
}

@keyframes progress {
    0% { width: 0%; transform: translateX(-100%); }
    50% { width: 100%; transform: translateX(0); }
    100% { width: 0%; transform: translateX(100%); }
}

/* ==================== 动画效果 ==================== */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* ==================== 输入框焦点动画 ==================== */
.form-group input:focus + .input-icon {
    color: #3b82f6;
    transform: scale(1.1);
}

/* ==================== 按钮点击波纹效果 ==================== */
.btn {
    position: relative;
    overflow: hidden;
}

.btn::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    background: rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

.btn:active::after {
    width: 300px;
    height: 300px;
}

/* ==================== 卡片悬浮3D效果 ==================== */
.card,
.stat-card {
    transform-style: preserve-3d;
    perspective: 1000px;
}

.card:hover,
.stat-card:hover {
    transform: translateY(-4px) rotateX(2deg) rotateY(2deg);
}

/* ==================== 分销商卡片特别样式 ==================== */
.distributor-card {
    background: white;
    border-radius: 20px;
    padding: 32px;
    margin-bottom: 32px;
    box-shadow: 
        0 4px 6px -1px rgba(0, 0, 0, 0.05),
        0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border: 1px solid #e2e8f0;
}

.distributor-card:hover {
    box-shadow: 
        0 20px 25px -5px rgba(0, 0, 0, 0.1),
        0 10px 10px -5px rgba(0, 0, 0, 0.04);
    transform: translateY(-2px);
    border-color: #3b82f6;
}

/* ==================== 图表容器样式 ==================== */
.chart-container {
    background: white;
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.chart-container:hover {
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
    transform: translateY(-2px);
}

/* ==================== 空状态样式 ==================== */
.empty-state {
    text-align: center;
    padding: 80px 20px;
    color: #94a3b8;
}

.empty-state-icon {
    font-size: 64px;
    margin-bottom: 20px;
    opacity: 0.5;
}

.empty-state-text {
    font-size: 18px;
    font-weight: 500;
    margin-bottom: 8px;
}

.empty-state-subtext {
    font-size: 14px;
    color: #64748b;
}