/*
 * 前台公共样式 - 性能优化版本
 * 特性：CSS自定义属性、浏览器兼容、性能优化、渐进增强
 */

/* ========== CSS 自定义属性（变量） ========== */
:root {
    /* 颜色系统 */
    --primary-color: #4e73df;
    --primary-color-light: #6c8ef5;
    --primary-color-dark: #2e59d9;
    --success-color: #1cc88a;
    --success-color-light: #2ce69b;
    --success-color-dark: #138c4a;
    --danger-color: #e74a3b;
    --danger-color-light: #f76a5b;
    --danger-color-dark: #b82c3c;
    --warning-color: #f6c23e;
    --warning-color-light: #f8d25e;
    --warning-color-dark: #dda520;
    --info-color: #36b9cc;
    --info-color-light: #56d9ec;
    --info-color-dark: #258391;
    --light-color: #f8f9fc;
    --dark-color: #5a5c69;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-400: #ced4da;
    --gray-500: #adb5bd;
    --gray-600: #6c757d;
    --gray-700: #495057;
    --gray-800: #343a40;
    --gray-900: #212529;

    /* 组件颜色 */
    --card-bg: #fff;
    --card-border-color: rgba(0, 0, 0, 0.125);
    --card-border-width: 1px;
    --btn-color: #fff;
    --btn-bg: var(--primary-color);
    --btn-border-color: var(--primary-color);
    
    /* 尺寸系统 */
    --border-radius: 0.35rem;
    --border-radius-sm: 0.25rem;
    --border-radius-lg: 0.5rem;
    --border-radius-xl: 0.75rem;
    --border-radius-2xl: 1rem;
    
    /* 阴影系统 */
    --box-shadow-sm: 0 0.125rem 0.25rem rgba(0, 0, 0, 0.075);
    --box-shadow: 0 0.15rem 1.75rem 0 rgba(58, 59, 69, 0.15);
    --box-shadow-lg: 0 1rem 3rem rgba(0, 0, 0, 0.175);
    
    /* 过渡动画 */
    --transition-fast: 0.15s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
    --transition-bounce: 0.3s cubic-bezier(0.68, -0.55, 0.265, 1.55);
    
    /* 字体系统 */
    --font-family-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --font-family-mono: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, Courier, monospace;
    
    /* 间距系统 */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Z-index 层级 */
    --z-dropdown: 1000;
    --z-sticky: 1020;
    --z-fixed: 1030;
    --z-modal-backdrop: 1040;
    --z-modal: 1050;
    --z-popover: 1060;
    --z-tooltip: 1070;
    --z-toast: 1080;
}

.is-hidden {
    display: none !important;
}

/* ========== 基础重置和优化 ========== */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    line-height: 1.15;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: rgba(0, 0, 0, 0);
}

body {
    margin: 0;
    font-family: var(--font-family-sans);
    font-size: 1rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--gray-900);
    background-color: var(--gray-100);
    transition: background-color var(--transition-base), color var(--transition-base);
    padding-top: 70px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ========== 关键渲染路径优化 ========== */
/* 优先渲染的内容 */
.navbar,
.card,
.btn,
.form-control {
    will-change: transform;
}

/* 延迟渲染的内容 */
.toast,
.modal,
.dropdown {
    will-change: opacity, transform;
}

/* ========== 动画关键帧 - 性能优化 ========== */
@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translate3d(0, -20px, 0) scale3d(0.98, 0.98, 1);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translate3d(0, 0, 0) scale3d(1, 1, 1);
    }
    to {
        opacity: 0;
        transform: translate3d(0, -10px, 0) scale3d(0.98, 0.98, 1);
    }
}

@keyframes slideInDown {
    from {
        transform: translate3d(0, -100%, 0);
        opacity: 0;
        visibility: visible;
    }
    to {
        transform: translate3d(0, 0, 0);
        opacity: 1;
    }
}

@keyframes slideOutUp {
    from {
        transform: translate3d(0, 0, 0);
        opacity: 1;
    }
    to {
        transform: translate3d(0, -100%, 0);
        opacity: 0;
        visibility: hidden;
    }
}

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

/* 减少动画（用户偏好） */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* ========== 导航栏优化 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-fixed);
    background-color: var(--gray-800);
    box-shadow: var(--box-shadow-sm);
    transition: box-shadow var(--transition-base);
}

.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
    color: #fff;
    text-decoration: none;
    transition: color var(--transition-fast);
}

.navbar-brand:hover {
    color: rgba(255, 255, 255, 0.8);
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color var(--transition-fast);
    padding: 0.5rem 1rem;
}

.nav-link:hover {
    color: #fff;
}

/* ========== Toast 通知系统 ========== */
#toastContainer {
    z-index: var(--z-toast);
    max-height: 80vh;
    overflow-y: auto;
    pointer-events: none;
}

#toastContainer .toast {
    pointer-events: auto;
}

.toast-pill {
    border-radius: var(--border-radius-xl);
    overflow: hidden;
    border: none;
    box-shadow: var(--box-shadow-lg);
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: transform var(--transition-bounce), box-shadow var(--transition-base);
    transform: translate3d(0, 0, 0);
    min-width: 320px;
    max-width: 500px;
    color: #fff;
}

.toast-pill.showing {
    animation: fadeIn var(--transition-slow) var(--transition-bounce) forwards;
}

.toast-pill.hiding {
    animation: fadeOut var(--transition-base) ease forwards;
}

.toast:not(.show) {
    opacity: 0;
    pointer-events: none;
    visibility: hidden;
}

.toast-pill:hover {
    transform: translate3d(0, -2px, 0) scale3d(1.02, 1.02, 1);
    box-shadow: 0 1.5rem 4rem rgba(0, 0, 0, 0.2);
}

.toast-pill .btn-close-white {
    opacity: 0.8;
    transition: opacity var(--transition-fast), transform var(--transition-fast);
    filter: invert(1) grayscale(100%) brightness(200%);
}

.toast-pill .btn-close-white:hover {
    opacity: 1;
    transform: scale(1.1);
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-title-text {
    font-size: 0.95rem;
    color: #fff;
}

.toast-message-text {
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.85);
}

.toast-pill--success {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.toast-pill--error {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

.toast-pill--warning-critical {
    background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%);
}

.toast-pill--warning {
    background: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
}

.toast-pill--info {
    background: linear-gradient(135deg, #a8edea 0%, #fed6e3 100%);
}

.toast-progress {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-lg);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
    min-width: 360px;
    max-width: 520px;
}

.toast-progress__body {
    padding: var(--spacing-lg);
}

.toast-progress__header {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.toast-progress__spinner {
    color: rgba(255, 255, 255, 0.85);
}

.toast-progress__bar-track {
    height: 6px;
    border-radius: 999px;
    background-color: rgba(255, 255, 255, 0.25);
    margin-bottom: var(--spacing-md);
    overflow: hidden;
}

.toast-progress__bar {
    height: 100%;
    border-radius: inherit;
    background: linear-gradient(90deg, #00d4ff, #090979);
    transition: width var(--transition-base);
}

.toast-progress__message {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.85rem;
}

.toast-progress--success {
    background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%);
}

.toast-progress--error {
    background: linear-gradient(135deg, #ff6b6b 0%, #ee5a24 100%);
}

.toast-progress--warning {
    background: linear-gradient(135deg, #f39c12 0%, #f1c40f 100%);
}

.toast-dismiss-btn {
    font-size: 0.8rem;
    opacity: 0.75;
}

.toast-dismiss-btn:hover {
    opacity: 1;
}

/* ========== 面包屑导航 ========== */
.breadcrumb {
    display: flex;
    flex-wrap: wrap;
    padding: 0;
    margin-bottom: var(--spacing-md);
    list-style: none;
    background-color: transparent;
    border-radius: var(--border-radius);
}

.breadcrumb-item {
    cursor: pointer;
}
.breadcrumb-item.active {
    cursor: default;
}
.breadcrumb-item a {
    cursor: pointer;
    text-decoration: none;
}

/* ========== 状态指示器 ========== */
.status-indicator {
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.folder-name {
    font-weight: 600;
    cursor: pointer;
    transition: color var(--transition-fast);
}

.folder-name:hover {
    color: var(--primary-color);
}

/* ========== 表单控件优化 ========== */
.form-control {
    display: block;
    width: 100%;
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--gray-900);
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid var(--gray-400);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-fast);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
}

.form-control:focus {
    color: var(--gray-900);
    background-color: #fff;
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
    transform: translateY(-1px);
}

.form-control::placeholder {
    color: var(--gray-600);
    opacity: 1;
}

.form-control:disabled {
    background-color: var(--gray-200);
    opacity: 1;
    cursor: not-allowed;
}

/* 选择框样式 */
.form-select {
    display: block;
    width: 100%;
    padding: 0.6rem 1rem;
    font-size: 0.95rem;
    font-weight: 400;
    line-height: 1.5;
    color: var(--gray-900);
    background-color: #fff;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7280' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e");
    background-position: right 0.5rem center;
    background-repeat: no-repeat;
    background-size: 1.5em 1.5em;
    border: 1px solid var(--gray-400);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding-right: 2.5rem;
}

.form-select:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

/* 复选框和单选框 */
.form-check-input {
    width: 1rem;
    height: 1rem;
    margin-top: 0.25em;
    vertical-align: top;
    background-color: #fff;
    background-repeat: no-repeat;
    background-position: center;
    background-size: contain;
    border: 1px solid var(--gray-400);
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    transition: background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-check-input[type="checkbox"] {
    border-radius: var(--border-radius-sm);
}

.form-check-input[type="radio"] {
    border-radius: 50%;
}

.form-check-input:checked {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.form-check-input[type="checkbox"]:checked {
    background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3cpath d='m13.854 3.646-7.5 7.5a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6 10.293l7.146-7.147a.5.5 0 0 1 .708.708z'/%3e%3c/svg%3e");
}

.form-check-input[type="radio"]:checked {
    background-image: url("data:image/svg+xml,%3csvg viewBox='0 0 16 16' fill='white' xmlns='http://www.w3.org/2000/svg'%3e%3ccircle cx='8' cy='8' r='3'/%3e%3c/svg%3e");
}

.form-check-input:focus {
    border-color: var(--primary-color);
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

.form-check-input:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* ========== 按钮系统优化 ========== */
.btn {
    display: inline-block;
    font-weight: 600;
    line-height: 1.5;
    color: var(--btn-color);
    text-align: center;
    text-decoration: none;
    vertical-align: middle;
    cursor: pointer;
    user-select: none;
    background-color: var(--btn-bg);
    border: 1px solid var(--btn-border-color);
    padding: 0.6rem 1.2rem;
    font-size: 0.9rem;
    border-radius: var(--border-radius-lg);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
    box-shadow: var(--box-shadow-sm);
    transform: translate3d(0, 0, 0);
    will-change: transform, box-shadow;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-lg);
}

.btn:active {
    transform: translateY(-1px);
    box-shadow: var(--box-shadow-sm);
}

.btn-primary {
    color: #fff;
    background: linear-gradient(135deg, var(--primary-color-light), var(--primary-color-dark));
    border-color: transparent;
}

.btn-success {
    color: #fff;
    background: linear-gradient(135deg, var(--success-color-light), var(--success-color-dark));
    border-color: transparent;
}

.btn-info {
    color: #fff;
    background: linear-gradient(135deg, var(--info-color-light), var(--info-color-dark));
    border-color: transparent;
}

.btn-warning {
    color: var(--gray-900);
    background: linear-gradient(135deg, var(--warning-color-light), var(--warning-color-dark));
    border-color: transparent;
}

.btn-danger {
    color: #fff;
    background: linear-gradient(135deg, var(--danger-color-light), var(--danger-color-dark));
    border-color: transparent;
}

.btn-light {
    color: var(--gray-900);
    background-color: var(--gray-100);
    border-color: var(--gray-300);
}

.btn-dark {
    color: #fff;
    background-color: var(--gray-800);
    border-color: var(--gray-800);
}

.btn:focus {
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
    box-shadow: none !important;
}

/* 按钮尺寸 */
.btn-sm {
    padding: 0.4rem 1rem;
    font-size: 0.875rem;
    border-radius: var(--border-radius-sm);
}

.btn-lg {
    padding: 0.8rem 2rem;
    font-size: 1.125rem;
    border-radius: var(--border-radius-lg);
}

/* 按钮波纹效果 */
.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transition: width 0.6s, height 0.6s;
    transform: translate(-50%, -50%);
    z-index: 0;
}

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

.btn > * {
    position: relative;
    z-index: 1;
}

/* ========== 卡片系统优化 ========== */
.card {
    position: relative;
    display: flex;
    flex-direction: column;
    min-width: 0;
    word-wrap: break-word;
    background-color: var(--card-bg);
    background-clip: border-box;
    border: var(--card-border-width) solid var(--card-border-color);
    border-radius: var(--card-border-radius);
    box-shadow: var(--box-shadow-sm);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
    overflow: hidden;
    margin-bottom: var(--spacing-lg);
    will-change: transform, box-shadow;
    transform: translate3d(0, 0, 0);
}

.card:hover {
    transform: translate3d(0, -3px, 0);
    box-shadow: var(--box-shadow-lg);
}

.card-header {
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: 0;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: #fff;
    border-bottom: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: var(--border-radius-xl) var(--border-radius-xl) 0 0;
}

.card-body {
    flex: 1 1 auto;
    padding: var(--spacing-lg);
}

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--gray-100);
    border-top: 1px solid rgba(0, 0, 0, 0.125);
    border-radius: 0 0 var(--border-radius-xl) var(--border-radius-xl);
}

.card-title {
    margin-bottom: var(--spacing-md);
    font-weight: 600;
    color: var(--gray-900);
}

body.dark-mode .card-title {
    color: #e0e0e0;
}

.card-text {
    margin-bottom: var(--spacing-md);
    color: var(--gray-700);
}

/* ========== 表格系统优化 ========== */
.table {
    width: 100%;
    margin-bottom: var(--spacing-md);
    color: var(--gray-900);
    vertical-align: middle;
    border-color: var(--gray-300);
    background-color: transparent;
    border-collapse: collapse;
}

.table th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    color: var(--gray-600);
    border-bottom: 2px solid var(--gray-300);
    background-color: var(--gray-100);
    padding: var(--spacing-md) var(--spacing-sm);
    text-align: left;
    vertical-align: bottom;
}

.table td {
    padding: var(--spacing-sm) var(--spacing-sm);
    border-bottom: 1px solid var(--gray-300);
    vertical-align: middle;
}

.table-hover tbody tr {
    transition: background-color var(--transition-fast);
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.025);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: rgba(0, 0, 0, 0.02);
}

/* ========== 徽章系统 ========== */
.badge {
    display: inline-block;
    padding: 0.35rem 0.65rem;
    font-size: 0.75em;
    font-weight: 600;
    line-height: 1;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    vertical-align: baseline;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.badge.bg-primary {
    background-color: var(--primary-color) !important;
}

.badge.bg-success {
    background-color: var(--success-color) !important;
}

.badge.bg-danger {
    background-color: var(--danger-color) !important;
}

.badge.bg-warning {
    background-color: var(--warning-color) !important;
    color: var(--gray-900) !important;
}

.badge.bg-info {
    background-color: var(--info-color) !important;
}

/* 状态徽章样式 */
.status-badge {
    font-size: 1rem !important;
    padding: 0.5rem 1rem !important;
    font-weight: 500;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--box-shadow-sm);
    transition: all var(--transition-base);
    cursor: default;
}

.status-badge:hover {
    transform: translateY(-1px);
    box-shadow: var(--box-shadow);
}

/* ========== 加载和进度系统 ========== */
.spinner {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    border: 0.2rem solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s ease-in-out infinite;
    vertical-align: middle;
    margin-right: 0.5rem;
}

.progress {
    display: flex;
    height: 1rem;
    overflow: hidden;
    font-size: 0.75rem;
    background-color: var(--gray-200);
    border-radius: var(--border-radius);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.075);
}

.progress-bar {
    display: flex;
    flex-direction: column;
    justify-content: center;
    overflow: hidden;
    color: #fff;
    text-align: center;
    white-space: nowrap;
    background-color: var(--primary-color);
    transition: width var(--transition-base);
    border-radius: var(--border-radius);
    background-image: linear-gradient(45deg, rgba(255, 255, 255, 0.15) 25%, transparent 25%, transparent 50%, rgba(255, 255, 255, 0.15) 50%, rgba(255, 255, 255, 0.15) 75%, transparent 75%, transparent);
    background-size: 1rem 1rem;
    animation: progress-bar-stripes 1s linear infinite;
}

@keyframes progress-bar-stripes {
    0% {
        background-position-x: 1rem;
    }
}

/* ========== 模态框系统 ========== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-modal);
    display: none;
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    overflow-y: auto;
    outline: 0;
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal.show {
    display: block;
}

.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    z-index: var(--z-modal-backdrop);
    width: 100vw;
    height: 100vh;
    background-color: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
}

.modal-dialog {
    position: relative;
    width: auto;
    margin: 1.75rem;
    pointer-events: none;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.modal-content {
    position: relative;
    display: flex;
    flex-direction: column;
    width: 100%;
    pointer-events: auto;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid rgba(0, 0, 0, 0.2);
    border-radius: var(--border-radius-xl);
    box-shadow: var(--box-shadow-lg);
    outline: 0;
}

.modal-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--gray-300);
    border-top-left-radius: var(--border-radius-xl);
    border-top-right-radius: var(--border-radius-xl);
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    color: #fff;
}

.modal-title {
    margin-bottom: 0;
    line-height: 1.5;
    font-weight: 600;
}

.modal-body {
    position: relative;
    flex: 1 1 auto;
    padding: var(--spacing-lg);
}

.modal-footer {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--gray-300);
    border-bottom-right-radius: var(--border-radius-xl);
    border-bottom-left-radius: var(--border-radius-xl);
    gap: var(--spacing-sm);
}

.btn-close {
    box-sizing: content-box;
    width: 1em;
    height: 1em;
    padding: 0.25em 0.25em;
    color: #fff;
    background: transparent url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='%23fff'%3e%3cpath d='m13.854 3.646-7.5 7.5a.5.5 0 0 1-.708 0l-3.5-3.5a.5.5 0 1 1 .708-.708L6 10.293l7.146-7.147a.5.5 0 0 1 .708.708z'/%3e%3c/svg%3e") center/1em auto no-repeat;
    border: 0;
    border-radius: var(--border-radius);
    opacity: 0.8;
    transition: opacity var(--transition-fast);
}

.btn-close:hover {
    opacity: 1;
}

/* ========== 警告框系统 ========== */
.alert {
    position: relative;
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    border: 1px solid transparent;
    border-radius: var(--border-radius);
    transition: all var(--transition-base);
}

.alert-primary {
    color: #084298;
    background-color: #cfe2ff;
    border-color: #b6d4fe;
}

.alert-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}

.alert-danger {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.alert-warning {
    color: #664d03;
    background-color: #fff3cd;
    border-color: #ffecb5;
}

.alert-info {
    color: #055160;
    background-color: #cff4fc;
    border-color: #b6effb;
}

.alert-dismissible {
    padding-right: 3rem;
}

.alert-dismissible .btn-close {
    position: absolute;
    top: 0;
    right: 0;
    z-index: 2;
    padding: 1.25rem 1rem;
    color: inherit;
    background: transparent;
    border: 0;
}

/* ========== 文件行和交互优化 ========== */
.file-row {
    transition: background-color var(--transition-fast);
    cursor: default;
}

.file-row:hover {
    background-color: rgba(0, 0, 0, 0.025);
}

.file-row--directory {
    cursor: pointer;
}

.file-row--directory:hover {
    background-color: rgba(37, 99, 235, 0.08);
}

/* ========== 容器和布局优化 ========== */
.container-fluid {
    width: 100%;
    padding-right: var(--spacing-md);
    padding-left: var(--spacing-md);
    margin-right: auto;
    margin-left: auto;
    transition: padding var(--transition-base);
}

/* ========== 防止布局偏移和闪烁 ========== */
.card,
.table,
.modal,
.toast {
    visibility: visible;
    opacity: 1;
    transition: opacity var(--transition-fast);
}

/* 加载状态 */
.loading {
    opacity: 0.6;
    pointer-events: none;
    position: relative;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid var(--gray-300);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    z-index: 1000;
}

/* 表格样式 */
.table {
    margin-bottom: 0;
    background-color: transparent;
}

.table th {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 0.5px;
    color: #6c757d;
    border-bottom: 2px solid #dee2e6;
    background-color: #f8f9fa;
    padding: 1rem 0.75rem;
}

.table td {
    padding: 0.75rem;
    vertical-align: middle;
    border-bottom: 1px solid #dee2e6;
}

.table-hover tbody tr:hover {
    background-color: rgba(0, 0, 0, 0.025);
}

/* 文件夹名称悬停效果 */
.folder-name {
    transition: color 0.2s ease;
    cursor: pointer;
}

.folder-name:hover {
    color: #0d6efd;
}

/* 文件行悬停效果 */
.file-row {
    transition: background-color 0.2s ease;
}

.file-row:hover {
    background-color: rgba(0, 0, 0, 0.025);
}

/* 模态框样式优化 */
.modal {
    z-index: 1055;
}

.modal-backdrop {
    z-index: 1050;
}

.modal-content {
    border: none;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.modal-header {
    background: linear-gradient(135deg, #4e73df, #2e59d9);
    color: white;
    border-bottom: none;
    border-radius: 12px 12px 0 0;
}

.modal-header .btn-close {
    filter: invert(1) grayscale(100%) brightness(200%);
}

/* 徽章样式 */
.badge {
    font-size: 0.75em;
    font-weight: 600;
    border-radius: 0.375rem;
    padding: 0.35rem 0.65rem;
}

/* 状态徽章样式 */
.status-badge {
    font-size: 1rem !important;
    padding: 0.5rem 1rem !important;
    font-weight: 500;
    border-radius: 0.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.status-badge:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

/* 警告框样式 */
.alert {
    border-radius: 0.5rem;
    border: 1px solid transparent;
    margin-bottom: 1rem;
}

.alert-dismissible .btn-close {
    padding: 0.875rem 0.75rem;
}

/* 导航栏样式 */
.navbar-brand {
    font-weight: 700;
    font-size: 1.25rem;
}

.nav-link {
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: rgba(255, 255, 255, 0.8) !important;
}

/* 响应式设计优化 */
@media (max-width: 768px) {
    .form-control, .btn {
        padding: 0.5rem 1rem;
        font-size: 0.9rem;
    }
    
    .card {
        border-radius: 10px;
        margin-bottom: 1rem;
    }
    
    .card-body {
        padding: 1rem;
    }
    
    .table {
        font-size: 0.875rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem 0.25rem;
        white-space: nowrap;
    }
    
    .btn-sm {
        padding: 0.25rem 0.5rem;
        font-size: 0.75rem;
    }
    
    /* 移动端隐藏某些列 */
    .table th:nth-child(4),
    .table td:nth-child(4) {
        display: none;
    }
    
    .modal-dialog {
        margin: 0.5rem;
        max-width: calc(100vw - 1rem);
    }
    
    .navbar-brand {
        font-size: 1.1rem;
    }
}

@media (max-width: 576px) {
    .container-fluid {
        padding-left: 1rem;
        padding-right: 1rem;
    }
    
    .card-title {
        font-size: 1.1rem;
    }
    
    .btn {
        padding: 0.4rem 0.8rem;
        font-size: 0.85rem;
    }
}

/* 防止布局偏移 */
.container-fluid {
    transition: padding 0.3s ease;
}

/* 防止内容闪烁 */
.card,
.table,
.modal {
    visibility: visible;
    opacity: 1;
    transition: opacity 0.2s ease-in-out;
}

/* 优化选择框样式 */
.form-check-input {
    border-radius: 0.25rem;
    border: 1px solid #ced4da;
    transition: all 0.2s ease;
}

.form-check-input:checked {
    background-color: #4e73df;
    border-color: #4e73df;
}

.form-check-input:focus {
    border-color: #4e73df;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
}

/* 优化下拉框样式 */
.form-select {
    border-radius: 8px;
    border: 1px solid #e0e0e0;
    transition: all 0.3s ease;
}

.form-select:focus {
    border-color: #4e73df;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
    outline: none;
}

/* 分页样式 */
.pagination {
    margin-bottom: 0;
}

.page-link {
    border-radius: 0.375rem;
    margin: 0 0.125rem;
    border: 1px solid #dee2e6;
    color: #4e73df;
    transition: all 0.2s ease;
}

.page-link:hover {
    background-color: #e9ecef;
    border-color: #adb5bd;
    color: #2e59d9;
}

.page-item.active .page-link {
    background-color: #4e73df;
    border-color: #4e73df;
}

/* 面包屑导航样式 */
.breadcrumb {
    background-color: transparent;
    padding: 0;
    margin-bottom: 1rem;
}

.breadcrumb-item + .breadcrumb-item::before {
    content: ">";
    color: #6c757d;
}

/* 工具提示样式 */
.tooltip {
    font-size: 0.875rem;
}

.tooltip-inner {
    background-color: #212529;
    border-radius: 0.375rem;
    padding: 0.5rem 0.75rem;
}

/* 加载状态 */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid #f3f3f3;
    border-top: 2px solid #4e73df;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

/* 暗黑模式支持 */
.dark-mode {
    background-color: #1a1a1a;
    color: #e9ecef;
}

.dark-mode .card {
    background-color: #2d3748;
    color: #e9ecef;
}

.dark-mode .table {
    color: #e9ecef;
}

.dark-mode .table th {
    background-color: #374151;
    color: #e9ecef;
}

.dark-mode .form-control {
    background-color: #374151;
    border-color: #4b5563;
    color: #e9ecef;
}

.dark-mode .form-control:focus {
    background-color: #374151;
    border-color: #4e73df;
    color: #e9ecef;
}

.dark-mode .modal-content {
    background-color: #2d3748;
    color: #e9ecef;
}

/* 打印样式 */
@media print {
    .navbar,
    .btn,
    .modal,
    #toastContainer {
        display: none !important;
    }
    
    .card {
        box-shadow: none;
        border: 1px solid #ddd;
    }
    
    .table {
        border-collapse: collapse;
    }
    
    .table th,
    .table td {
        border: 1px solid #ddd;
    }
}

.dark-mode-toggle {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    transition: all 0.3s ease;
}

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

.btn-gradient {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    border: none;
    color: #fff;
    font-weight: 600;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    box-shadow: 0 4px 12px rgba(79,172,254,0.4);
}

body.dark-mode .btn-gradient {
    box-shadow: 0 4px 12px rgba(79,172,254,0.6);
}

.btn-gradient:hover {
    transform: translateY(-1px);
    box-shadow: 0 10px 24px rgba(0,242,254,0.35);
    color: #ffd166;
}

.btn-gradient:disabled {
    opacity: 0.75;
    box-shadow: none;
}

.dark-mode-toggle i {
    font-size: 24px;
    color: white;
}

/* 深色模式 */
body.dark-mode {
    background-color: #1a1a1a;
    color: #e0e0e0;
    --gray-900: #e0e0e0;

    /* 组件颜色 */
    --card-bg: #2d2d2d;
    --card-border-color: #404040;
    --btn-color: #fff;
    --btn-bg: var(--primary-color);
    --btn-border-color: var(--primary-color);
}

body.dark-mode .navbar-dark {
    background-color: #0d0d0d !important;
}

body.dark-mode .card {
    background-color: #2d2d2d;
    color: #e0e0e0;
    border-color: #404040;
}

body.dark-mode .bg-light {
    background-color: #252525 !important;
    color: #e0e0e0;
}

body.dark-mode .border.rounded.bg-light {
    background-color: #1a1a1a !important;
    border-color: #404040 !important;
}

body.dark-mode .border {
    border-color: #404040 !important;
}

body.dark-mode .form-control,
body.dark-mode .form-select {
    background-color: #2d2d2d !important;
    color: #e0e0e0 !important;
    border-color: #555;
}

body.dark-mode .form-control::placeholder {
    color: #888 !important;
}

body.dark-mode .form-control:focus,
body.dark-mode .form-select:focus {
    background-color: #3d3d3d !important;
    color: #e0e0e0 !important;
    border-color: #667eea;
    box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
}

body.dark-mode input:-webkit-autofill,
body.dark-mode input:-webkit-autofill:hover,
body.dark-mode input:-webkit-autofill:focus,
body.dark-mode input:-webkit-autofill:active,
body.dark-mode textarea:-webkit-autofill,
body.dark-mode textarea:-webkit-autofill:hover,
body.dark-mode textarea:-webkit-autofill:focus,
body.dark-mode textarea:-webkit-autofill:active {
    -webkit-box-shadow: 0 0 0 1000px #3d3d3d inset !important;
    -webkit-text-fill-color: #e0e0e0 !important;
    box-shadow: 0 0 0 1000px #3d3d3d inset !important;
    background-color: #3d3d3d !important;
    color: #e0e0e0 !important;
    border-color: #555 !important;
}

body.dark-mode .table {
    color: #e0e0e0;
    background-color: #2d2d2d;
}

body.dark-mode .table thead th {
    background-color: #1a1a1a;
    color: #e0e0e0;
    border-color: #404040;
}

body.dark-mode .table tbody td {
    background-color: #2d2d2d;
    color: #e0e0e0;
    border-color: #404040;
}

body.dark-mode .table-striped > tbody > tr:nth-of-type(odd) > * {
    background-color: #252525;
}

body.dark-mode .table-striped > tbody > tr:nth-of-type(even) > * {
    background-color: #2d2d2d;
}

body.dark-mode .table-hover > tbody > tr:hover > * {
    background-color: #3d3d3d !important;
}

body.dark-mode .file-row:hover {
    background-color: #3d3d3d;
}

body.dark-mode .btn {
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

body.dark-mode .btn-primary {
    background: linear-gradient(135deg, #4e73df, #224abe);
    border-color: #4e73df;
}

body.dark-mode .btn-secondary {
    background: linear-gradient(135deg, #6c757d, #5a6268);
    border-color: #6c757d;
}

body.dark-mode .btn-success {
    background: linear-gradient(135deg, #1cc88a, #13855c);
    border-color: #1cc88a;
}

body.dark-mode .btn-danger {
    background: linear-gradient(135deg, #e74a3b, #be2617);
    border-color: #e74a3b;
}

body.dark-mode .btn-warning {
    background: linear-gradient(135deg, #f6c23e, #d4a72c);
    border-color: #f6c23e;
    color: #212529;
}

body.dark-mode .btn-info {
    background: linear-gradient(135deg, #36b9cc, #258391);
    border-color: #36b9cc;
}

body.dark-mode .form-control {
    background-color: #2d2d2d;
    border-color: #404040;
    color: #e0e0e0;
    caret-color: #4e73df;
}

body.dark-mode .form-control:focus {
    background-color: #3d3d3d;
    border-color: #4e73df;
    color: #fff;
    caret-color: #4e73df;
}

body.dark-mode .input-group-text {
    background-color: #1a1a1a;
    border-color: #404040;
    color: #e0e0e0;
}

body.dark-mode .card-header {
    background: linear-gradient(135deg, #1a1a1a, #2d2d2d);
    border-bottom: 1px solid #404040;
}

body.dark-mode .file-row:hover > * {
    background-color: #3d3d3d !important;
}

body.dark-mode .folder-name:hover {
    color: #667eea !important;
    text-decoration: underline;
}

body.dark-mode .breadcrumb {
    background-color: #2d2d2d;
}

body.dark-mode .breadcrumb-item a {
    color: #667eea;
}

body.dark-mode .breadcrumb-item.active {
    color: #e0e0e0;
}

body.dark-mode .alert-info {
    background-color: #1a2332;
    border-color: #2a3f5f;
    color: #a8c5e8;
}

body.dark-mode .card.shadow-sm {
    box-shadow: 0 0.125rem 0.5rem rgba(0, 0, 0, 0.5) !important;
}

body.dark-mode .alert-warning {
    background-color: #5a4a1f;
    border-color: #7a6a2f;
    color: #f5d99f;
}

body.dark-mode .btn-outline-secondary {
    color: #e0e0e0;
    border-color: #555;
}

body.dark-mode .btn-outline-secondary:hover {
    background-color: #555;
    color: #fff;
}

body.dark-mode .modal-content {
    background-color: #2d2d2d;
    color: #e0e0e0;
}

body.dark-mode .modal-header {
    border-bottom-color: #404040;
}

body.dark-mode .modal-footer {
    border-top-color: #404040;
}

body.dark-mode .btn-close {
    filter: invert(1);
}

body.dark-mode .text-muted {
    color: #999 !important;
}

body.dark-mode .badge {
    background-color: #3d3d3d;
    color: #e0e0e0;
}

body.dark-mode .badge.bg-success {
    background-color: #198754 !important;
}

body.dark-mode .badge.bg-danger {
    background-color: #dc3545 !important;
}

body.dark-mode .badge.bg-warning {
    background-color: #ffc107 !important;
    color: #000 !important;
}

body.dark-mode .badge.bg-info {
    background-color: #0dcaf0 !important;
    color: #000 !important;
}

body.dark-mode .btn-success {
    background-color: #198754;
    border-color: #198754;
}

body.dark-mode .btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

body.dark-mode input[type="checkbox"] {
    filter: brightness(0.8);
}

body.dark-mode .dark-mode-toggle {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
}

/* 组件级样式：toast、按钮、卡片等 */
#toastContainer {
    z-index: 9999;
}

#pushToast {
    border-radius: 12px;
    overflow: hidden;
    border: none;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    background: rgba(255, 255, 255, 0.9);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#pushToast.showing {
    animation: fadeIn 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

#pushToast.hiding {
    animation: fadeOut 0.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
}

.toast:not(.show) {
    opacity: 0;
    pointer-events: none;
}

.form-control {
    border-radius: 8px;
    padding: 0.6rem 1rem;
    border: 1px solid #e0e0e0;
    transition: all 0.3s ease;
    font-size: 0.95rem;
    color: #333;
    caret-color: #4e73df;
}

.form-control:focus {
    border-color: #4e73df;
    box-shadow: 0 0 0 0.2rem rgba(78, 115, 223, 0.25);
    transform: translateY(-1px);
    background-color: #fff;
}

.btn {
    border-radius: 8px;
    padding: 0.6rem 1.5rem;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    border: none;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}


.spinner {
    display: inline-block;
    width: 1.25rem;
    height: 1.25rem;
    border: 0.2rem solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 0.8s ease-in-out infinite;
    vertical-align: middle;
    margin-right: 0.5rem;
}

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

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes fadeOut {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(-10px) scale(0.98);
    }
}

@keyframes slideInDown {
    from {
        transform: translateY(-100%);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

@keyframes slideOutUp {
    from {
        transform: translateY(0);
        opacity: 1;
    }
    to {
        transform: translateY(-100%);
        opacity: 0;
    }
}

.progress-bar {
    transition: width 0.3s ease;
}

#toastContainer {
    max-height: 80vh;
    overflow-y: auto;
}

#pushToast:hover {
    transform: translate(-50%, 0) scale(1.02);
}

#pushToast .btn-close-white {
    opacity: 0.8;
    transition: opacity 0.2s ease, transform 0.2s ease;
}

#pushToast .btn-close-white:hover {
    opacity: 1;
    transform: scale(1.1);
}

.folder-name {
    transition: color 0.2s ease;
}

.folder-name:hover {
    color: #0d6efd;
}