/* ==================== CSS 变量 ==================== */
:root {
    /* 主题色 */
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --primary-light: #818cf8;

    /* 语义色 */
    --success: #10b981;
    --success-light: #34d399;
    --warning: #f59e0b;
    --warning-light: #fbbf24;
    --danger: #ef4444;
    --danger-light: #f87171;
    --info: #3b82f6;
    --info-light: #60a5fa;

    /* 中性色 */
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;

    /* 浅色主题 */
    --bg-primary: #ffffff;
    --bg-secondary: var(--gray-50);
    --bg-tertiary: var(--gray-100);
    --text-primary: var(--gray-900);
    --text-secondary: var(--gray-600);
    --text-tertiary: var(--gray-400);
    --border-color: var(--gray-200);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* 动画 */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s ease-in-out;
}

/* 深色主题 */
[data-theme="dark"] {
    --bg-primary: var(--gray-900);
    --bg-secondary: var(--gray-800);
    --bg-tertiary: var(--gray-700);
    --text-primary: var(--gray-50);
    --text-secondary: var(--gray-300);
    --text-tertiary: var(--gray-500);
    --border-color: var(--gray-700);
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.5);
    --shadow: 0 1px 3px 0 rgb(0 0 0 / 0.5), 0 1px 2px -1px rgb(0 0 0 / 0.5);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.5), 0 2px 4px -2px rgb(0 0 0 / 0.5);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.5), 0 4px 6px -4px rgb(0 0 0 / 0.5);
}

/* ==================== 基础样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Noto Sans',
                 Helvetica, Arial, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji';
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
    overflow-x: hidden;
}

/* ==================== 导航栏 ==================== */
.navbar {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
    backdrop-filter: blur(12px);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

.brand-icon {
    font-size: 1.75rem;
    animation: bounce 2s ease-in-out infinite;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.brand-text {
    background: linear-gradient(135deg, var(--primary) 0%, var(--info) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-actions {
    display: flex;
    gap: 0.5rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.btn-icon:hover {
    background: var(--bg-tertiary);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-2px);
}

.btn-icon:active {
    transform: translateY(0);
}

.btn-icon .icon {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

.btn-icon.rotating .icon {
    animation: rotate 1s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==================== 主容器 ==================== */
.main-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 2rem;
}

/* ==================== 统计卡片 ==================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 1.5rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-icon {
    width: 56px;
    height: 56px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.stat-icon svg {
    width: 28px;
    height: 28px;
    stroke-width: 2.5;
}

.stat-icon.primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.stat-icon.success {
    background: linear-gradient(135deg, #10b981 0%, #059669 100%);
    color: white;
}

.stat-icon.warning {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%);
    color: white;
}

.stat-icon.info {
    background: linear-gradient(135deg, #3b82f6 0%, #2563eb 100%);
    color: white;
}

.stat-content {
    flex: 1;
    min-width: 0;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-value.small {
    font-size: 1rem;
    font-weight: 600;
}

/* ==================== 快速操作 ==================== */
.quick-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.action-btn {
    flex: 1;
    min-width: 150px;
    padding: 1rem 1.5rem;
    background: var(--bg-primary);
    border: 2px solid var(--border-color);
    border-radius: 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.action-btn svg {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

.action-btn:hover {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.action-btn.active {
    border-color: var(--primary);
    background: var(--primary);
    color: white;
}

/* ==================== 内容区域 ==================== */
.content-section {
    background: var(--bg-primary);
    border-radius: 16px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    border: 1px solid var(--border-color);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.section-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* 搜索框 */
.search-box {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: 1rem;
    width: 18px;
    height: 18px;
    color: var(--text-tertiary);
    stroke-width: 2;
}

#search-input {
    padding: 0.75rem 1rem 0.75rem 2.75rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    width: 250px;
    transition: var(--transition-fast);
}

#search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* 筛选器 */
.filter-select {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* ==================== 项目卡片网格 ==================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--primary);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 1rem;
}

.project-info h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.project-provider {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.project-meta-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.owner-project-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(99, 102, 241, 0.12);
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--primary);
}

.project-status {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    flex-shrink: 0;
    margin-top: 0.25rem;
}

.project-status.normal {
    background: var(--success);
    box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.2);
}

.project-status.alert {
    background: var(--danger);
    box-shadow: 0 0 0 3px rgba(239, 68, 68, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.project-balance {
    margin: 1.5rem 0;
}

.balance-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.balance-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.balance-progress {
    width: 100%;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: 999px;
    overflow: hidden;
    margin-top: 0.75rem;
}

.balance-progress-bar {
    height: 100%;
    border-radius: 999px;
    transition: width 0.5s ease, background 0.3s ease;
}

.balance-progress-bar.normal {
    background: linear-gradient(90deg, var(--success) 0%, var(--success-light) 100%);
}

.balance-progress-bar.warning {
    background: linear-gradient(90deg, var(--warning) 0%, var(--warning-light) 100%);
}

.balance-progress-bar.danger {
    background: linear-gradient(90deg, var(--danger) 0%, var(--danger-light) 100%);
}

.project-details {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.75rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

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

.detail-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    margin-bottom: 0.25rem;
}

.detail-value {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* ==================== 订阅列表 ==================== */
.subscriptions-list {
    display: grid;
    gap: 1rem;
}

.subscription-card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-fast);
}

.subscription-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.subscription-info h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.subscription-meta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.meta-item {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.project-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--primary);
    font-weight: 600;
}

.project-meta svg {
    width: 14px;
    height: 14px;
    stroke-width: 2;
}

.subscription-status {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.days-remaining {
    font-size: 2rem;
    font-weight: 700;
}

.days-remaining.warning {
    color: var(--warning);
}

.days-remaining.danger {
    color: var(--danger);
}

/* ==================== 按钮组件 ==================== */
.btn-primary {
    padding: 0.75rem 1.5rem;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition-fast);
}

.btn-primary svg {
    width: 18px;
    height: 18px;
    stroke-width: 2;
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-primary:active {
    transform: translateY(0);
}

/* ==================== 加载状态 ==================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.loading-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.loading-spinner {
    background: var(--bg-primary);
    padding: 2rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto 1rem;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ==================== Toast 通知 ==================== */
.toast-container {
    position: fixed;
    top: 5rem;
    right: 2rem;
    z-index: 10000;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.toast {
    background: var(--bg-primary);
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    border-left: 4px solid var(--primary);
    min-width: 300px;
    display: flex;
    align-items: center;
    gap: 1rem;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        transform: translateX(400px);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

.toast.success {
    border-left-color: var(--success);
}

.toast.error {
    border-left-color: var(--danger);
}

.toast.warning {
    border-left-color: var(--warning);
}

.toast.info {
    border-left-color: var(--info);
}

/* ==================== 空状态 ==================== */
.empty-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
    opacity: 0.3;
    stroke-width: 1;
}

.empty-state h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.empty-state p {
    font-size: 0.95rem;
}

/* ==================== 模态框 ==================== */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(4px);
    z-index: 10000;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--bg-primary);
    border-radius: 16px;
    max-width: 600px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
    animation: modalSlideIn 0.3s ease;
}

.auth-modal {
    z-index: 11000;
}

.auth-modal-content {
    max-width: 420px;
}

@keyframes modalSlideIn {
    from {
        transform: translateY(-50px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.modal-close:hover {
    background: var(--bg-tertiary);
    color: var(--danger);
}

.modal-close svg {
    width: 20px;
    height: 20px;
    stroke-width: 2;
}

.modal-body {
    padding: 2rem;
}

.modal-footer {
    padding: 1rem 2rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* ==================== 表单样式 ==================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-secondary);
    color: var(--text-primary);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-error {
    color: var(--danger);
    font-size: 0.875rem;
    line-height: 1.5;
    margin: 0;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    cursor: pointer;
    font-weight: 400;
}

.checkbox-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
}

.btn-secondary {
    padding: 0.75rem 1.5rem;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--text-secondary);
}

/* ==================== 订阅卡片操作按钮 ==================== */
.subscription-card {
    position: relative;
}

.subscription-actions {
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.subscription-card:hover .subscription-actions {
    opacity: 1;
}

.action-icon-btn {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.action-icon-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.action-icon-btn.danger:hover {
    background: var(--danger);
    border-color: var(--danger);
}

.action-icon-btn.success:hover {
    background: var(--success);
    border-color: var(--success);
}

.action-icon-btn svg {
    width: 16px;
    height: 16px;
    stroke-width: 2;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .main-container {
        padding: 1rem;
    }

    .nav-container {
        padding: 1rem;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 1rem;
    }

    .projects-grid {
        grid-template-columns: 1fr;
    }

    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .section-actions {
        width: 100%;
    }

    #search-input {
        width: 100%;
    }

    .quick-actions {
        flex-direction: column;
    }

    .action-btn {
        min-width: 100%;
    }

    .toast-container {
        right: 1rem;
        left: 1rem;
    }

    .toast {
        min-width: auto;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

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

    .balance-value {
        font-size: 1.5rem;
    }
}

/* ==================== 打印样式 ==================== */
@media print {
    .navbar,
    .quick-actions,
    .section-actions {
        display: none;
    }

    .project-card {
        break-inside: avoid;
    }
}

/* ==================== 设置面板 ==================== */
.settings-section {
    margin-bottom: 2rem;
}

.settings-section:last-child {
    margin-bottom: 0;
}

.settings-section h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

/* ==================== 项目操作 ==================== */
.project-actions {
    padding-top: 1rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.btn-link {
    background: none;
    border: none;
    color: var(--primary);
    font-size: 0.875rem;
    font-weight: 500;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0;
    transition: var(--transition-fast);
}

.btn-link:hover {
    color: var(--primary-dark, #4f46e5);
    text-decoration: underline;
}

.btn-link svg {
    stroke-width: 2;
}

/* ==================== 趋势图表模态框 ==================== */
.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}

.trend-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.trend-stat-card {
    padding: 1rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    text-align: center;
}

.trend-stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.trend-stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.trend-stat-value.positive {
    color: var(--success);
}

.trend-stat-value.negative {
    color: var(--danger);
}

/* ==================== 视图切换器 ==================== */
.view-toggle {
    display: flex;
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 2px;
    border: 1px solid var(--border-color);
}

.view-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-tertiary);
    cursor: pointer;
    transition: var(--transition-fast);
}

.view-btn:hover {
    color: var(--text-primary);
}

.view-btn.active {
    background: var(--bg-primary);
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

/* ==================== 项目卡片列表模式 ==================== */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.projects-list .project-card {
    display: grid;
    grid-template-columns: 2fr 3fr 3fr 1fr;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem 1.5rem;
}

.projects-list .project-card:hover {
    transform: translateX(4px);
    box-shadow: var(--shadow-sm);
}

.projects-list .project-header {
    margin-bottom: 0;
    align-items: center;
}

.projects-list .project-balance {
    margin: 0;
    display: flex;
    align-items: center;
    gap: 1rem;
}

.projects-list .balance-label {
    display: none;
}

.projects-list .balance-value {
    font-size: 1.25rem;
    min-width: 80px;
}

.projects-list .balance-progress {
    margin-top: 0;
    flex: 1;
}

.projects-list .project-details {
    padding-top: 0;
    border-top: none;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    align-items: center;
}

.projects-list .detail-item {
    flex-direction: row;
    align-items: center;
    gap: 0.25rem;
}

.projects-list .detail-label::after {
    content: ":";
}

.projects-list .project-actions {
    display: flex;
    justify-content: flex-end;
}

@media (max-width: 1024px) {
    .projects-list .project-card {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .projects-list .project-details {
        grid-template-columns: repeat(2, 1fr);
    }
}