/* =======================================================
   Stardust Server 主题样式（整理版）
   分区：
   1) 设计变量与全局基础
   2) 布局与导航/页脚
   3) 通用组件（卡片、按钮、表单、表格、分页、下拉、告警、加载）
   4) 页面级样式（下载、上传、登录、用户/审计）
   5) 响应式适配与动画
   说明：合并共享样式、使用变量，遵循 DRY
   ======================================================= */
/* Stardust Server 主题样式 */

:root, [data-bs-theme="transparent"] {
    /* 主要颜色定义 */
    --bs-body-color: rgb(226, 241, 243);
    --bs-border-color: rgba(226, 241, 243, 0.7);
    --bs-hover-color: rgba(226, 241, 243, 0.1);
    --bs-shadow-color: rgba(226, 241, 243, 0.4);
    --text-dark: #212529;
    --text-light: #f1fcff;
    --text-muted: rgba(226, 241, 243, 0.75);

    /* 品牌与渐变（共享变量） */
    --brand-accent: #8dd0ff;
    --brand-accent-hover: #b7e2ff;
    --brand-blue: #3498db;
    --gradient-primary-start: rgba(67, 97, 238, 0.8);
    --gradient-primary-end: rgba(63, 55, 201, 0.8);

    /* 背景设置为完全透明 */
    --bs-body-bg: transparent;
    --bs-tertiary-bg: transparent;
    --bs-secondary-bg: transparent;
    --bs-light-bg: transparent;

    /* 组件背景透明 */
    --bs-card-bg: transparent;
    --bs-modal-bg: transparent;
    --bs-dropdown-bg: transparent;
    --bs-popover-bg: transparent;
    --bs-tooltip-bg: transparent;
    --bs-offcanvas-bg: transparent;
    --bs-toast-bg: transparent;
    --bs-body-bg-rgb: transparent;

    /* 按钮背景透明 */
    --bs-btn-bg: transparent;
    --bs-btn-hover-bg: rgba(226, 241, 243, 0.1);
    --bs-btn-active-bg: rgba(226, 241, 243, 0.2);
    --bs-btn-disabled-bg: transparent;

    /* 表单控件 */
    --bs-form-control-bg: transparent;
    --bs-form-control-disabled-bg: transparent;

    /* 导航栏 */
    --bs-navbar-bg: transparent;

    /* 表格 */
    --bs-table-bg: transparent;
    --bs-table-striped-bg: rgba(226, 241, 243, 0.05);
    --bs-table-hover-bg: rgba(226, 241, 243, 0.1);
}

/* 使用伪元素创建固定背景 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("background.jpg");
    background-repeat: no-repeat;
    background-position: center bottom;
    background-size: cover;
    z-index: -1;
    /* 防止缩放的关键属性 */
    transform: scale(1);
    will-change: transform;
}

/* 增强透明效果 */
[data-bs-theme="transparent"] .card,
[data-bs-theme="transparent"] .modal-content,
[data-bs-theme="transparent"] .dropdown-menu,
[data-bs-theme="transparent"] .popover,
[data-bs-theme="transparent"] .offcanvas,
[data-bs-theme="transparent"] .pagination,
[data-bs-theme="transparent"] .toast {
    backdrop-filter: blur(10px);
    background-color: rgba(0, 0, 0, 0.15) !important;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}

/* 按钮样式增强 */
[data-bs-theme="transparent"] .btn {
    border: 1px solid var(--bs-border-color);
    transition: all 0.3s ease;
}

/* 导航栏样式 */
[data-bs-theme="transparent"] .navbar {
    border-bottom: 1px solid var(--bs-border-color);
}

/* 表单控件样式 */
[data-bs-theme="transparent"] .form-control,
[data-bs-theme="transparent"] .form-select {
    border: 1px solid var(--bs-border-color);
    color: var(--bs-body-color);
}

/* 表格样式 */
[data-bs-theme="transparent"] .table {
    --bs-table-color: var(--bs-body-color);
    --bs-table-border-color: var(--bs-border-color);
}

/* 进度条样式 */
[data-bs-theme="transparent"] .progress {
    background-color: rgba(226, 241, 243, 0.1);
}

/* 链接样式 */
[data-bs-theme="transparent"] a {
    color: var(--brand-accent);
    text-decoration: none;
}

[data-bs-theme="transparent"] a:hover {
    color: var(--brand-accent-hover);
    text-decoration: underline;
}

/* Header（导航栏）样式 */
.navbar {
    background: rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    color: rgba(241, 252, 255, 0.9);
    border-bottom: 1px solid rgba(226, 241, 243, 0.3);
    margin-bottom: 1rem;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
}

.navbar-brand {
	font-weight: 600;
	font-size: 1.3rem;
	color: #f1fcff !important;
	transition: all 0.3s ease;
}

.navbar-brand:hover {
	color: #8dd0ff !important;
	transform: translateY(-1px);
}

.navbar-brand i { margin-right: 8px; font-size: 1.4rem; }

.nav-link {
	color: rgba(241, 252, 255, 0.9) !important;
	font-weight: 500;
	padding: 0.75rem 1rem !important;
	border-radius: 6px;
	margin: 0 2px;
	transition: all 0.3s ease;
	position: relative;
}

.nav-link:hover {
	color: #8dd0ff !important;
	background-color: rgba(141, 208, 255, 0.1);
	transform: translateY(-1px);
}

.nav-link.active {
	color: #8dd0ff !important;
	background-color: rgba(141, 208, 255, 0.15);
	font-weight: 600;
}

.nav-link i { margin-right: 6px; font-size: 1rem; }

.btn-outline-light {
	border-color: rgba(241, 252, 255, 0.5);
	color: rgba(241, 252, 255, 0.9);
	font-weight: 500;
	transition: all 0.3s ease;
}

.btn-outline-light:hover {
	background-color: rgba(241, 252, 255, 0.1);
	border-color: rgba(241, 252, 255, 0.8);
	color: #8dd0ff;
	transform: translateY(-1px);
}

.navbar-toggler { border-color: rgba(241, 252, 255, 0.5); }
.navbar-toggler:focus { box-shadow: 0 0 0 0.2rem rgba(141, 208, 255, 0.25); }

@media (max-width: 991px) {
	.navbar-collapse {
		background-color: rgba(0, 0, 0, 0.1);
		border-radius: 8px;
		margin-top: 10px;
		padding: 10px;
	}
	.nav-link { margin: 2px 0; }
}

/* 通用组件样式 */
.header {
    margin-bottom: 1.5rem;
    padding: 1rem 0;
}

.card {
    border-radius: 12px;
    box-shadow: 0 5px 15px var(--bs-shadow-color);
    border: 1px solid var(--bs-border-color);
    margin-bottom: 1.5rem;
    transition: transform 0.3s ease;
}

.card:hover {
    transform: translateY(-3px);
}

.card-header {
    border-bottom: 1px solid var(--bs-border-color);
    font-weight: 600;
    padding: 1rem;
    border-radius: 12px 12px 0 0 !important;
}

/* 文件相关样式 */
.file-item {
    display: flex;
    flex-direction: column;
    padding: 1rem;
    border-bottom: 1px solid var(--bs-border-color);
    transition: background-color 0.2s;
}

.file-item:hover {
    background-color: var(--bs-hover-color);
}

.file-icon-container {
    display: flex;
    justify-content: center;
    margin-bottom: 1rem;
}

.file-icon {
    width: 80px;
    height: 80px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    font-size: 2.5rem;
}

.file-info {
    flex-grow: 1;
}

.file-name {
    font-weight: 500;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    word-break: break-word;
}

.file-meta {
    font-size: 0.85rem;
    color: var(--text-light);
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-top: 0.8rem;
}

.file-size, .file-date {
    display: flex;
    align-items: center;
}

.file-type-badge {
    background-color: var(--bs-hover-color);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

.file-size-badge {
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
}

.file-info-row {
    display: flex;
    margin-bottom: 0.4rem;
    flex-wrap: wrap;
}

.file-info-label {
    font-weight: bold;
    min-width: 80px;
    margin-right: 10px;
}

.file-info-value {
    flex: 1;
    word-break: break-word;
}

/* 按钮样式（共享基础） */
.btn-download,
.btn-edit,
.btn-delete,
.btn-login,
.btn-logout {
    background-color: var(--bs-hover-color);
    color: var(--text-light);
    border: none;
    padding: 0.6rem 1rem;
    border-radius: 6px;
    font-weight: 500;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-download:hover,
.btn-edit:hover,
.btn-delete:hover,
.btn-login:hover,
.btn-logout:hover {
    background-color: var(--bs-border-color);
    color: var(--text-dark);
    box-shadow: 0 4px 8px var(--bs-shadow-color);
    text-decoration: none;
}

.btn-download:active,
.btn-edit:active,
.btn-delete:active,
.btn-login:active,
.btn-logout:active { transform: translateY(0); }

/* 下载按钮在移动端块级铺满的场景单独适配 */
.btn-download { margin-top: 1rem; width: 100%; }

/* 上传页面特定样式 */
.upload-container {
    max-width: 800px;
    margin: 0 auto;
    background: rgba(0, 0, 0, 0.15);
    border-radius: 16px;
    box-shadow: 0 5px 15px var(--bs-shadow-color);
    border: 1px solid var(--bs-border-color);
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.header-section {
    background: linear-gradient(120deg, var(--gradient-primary-start), var(--gradient-primary-end));
    color: var(--text-light);
    padding: 30px;
    text-align: center;
    border-bottom: 1px solid var(--bs-border-color);
}

.header-icon {
    font-size: 4rem;
    margin-bottom: 20px;
    color: rgba(226, 241, 243, 0.8);
}

.upload-section {
    padding: 30px;
}

.upload-area {
    border: 3px dashed var(--bs-border-color);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    background-color: var(--bs-hover-color);
    transition: all 0.3s ease;
    cursor: pointer;
}

/* 页脚样式 */
.footer {
    background: rgba(0, 0, 0, 0.15);
    backdrop-filter: blur(10px);
    color: rgba(241, 252, 255, 0.9);
    border-top: 1px solid rgba(226, 241, 243, 0.3);
    margin-top: 1rem;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.08);
    padding: 1.25rem 0;
}

.footer a {
	color: #a3d0ff;
	text-decoration: none;
	transition: all 0.3s ease;
}

.footer a:hover {
	color: #ffffff;
	text-decoration: underline;
}

.footer-title {
	position: relative;
	padding-bottom: 10px;
	margin-bottom: 20px;
	font-weight: 600;
	letter-spacing: 1px;
}

.footer-title:after {
	content: '';
	position: absolute;
	left: 0;
	bottom: 0;
	width: 50px;
	height: 3px;
    background: var(--brand-blue);
}

.social-links {
	display: flex;
	gap: 15px;
	margin-top: 20px;
	margin-bottom: 20px;
	justify-content: center;
}

.social-links a {
	display: inline-flex;
	align-items: center;
	justify-content: center;
	padding: 0 12px;
	min-height: 40px;
	background: rgba(255, 255, 255, 0.1);
	border-radius: 20px;
	transition: all 0.3s ease;
}

.social-links a:hover {
	background: #3498db;
	transform: translateY(-5px);
}

.copyright {
	border-top: 1px solid rgba(255, 255, 255, 0.1);
	padding-top: 20px;
	margin-top: 30px;
	text-align: center;
	font-size: 0.9rem;
	color: #aaa;
}

.footer-logo {
	display: flex;
	align-items: center;
	gap: 10px;
	justify-content: center;
}

.footer-logo i {
	font-size: 2rem;
    color: var(--brand-blue);
}

.footer-logo span {
	font-size: 1rem;
	font-weight: 700;
}

@media (max-width: 768px) {
	.footer .col-md-3, .footer .col-md-2 {
		margin-bottom: 30px;
	}
}

/* 登录页样式 */
.login-container {
	min-height: 100vh;
	display: flex;
	align-items: center;
	justify-content: center;
	background: var(--bs-body-bg);
}

.login-card {
	background: rgba(0, 0, 0, 0.15);
	border: 1px solid var(--bs-border-color);
	border-radius: 6px;
	box-shadow: 0 4px 8px var(--bs-shadow-color);
	padding: 2rem;
	width: 100%;
	max-width: 400px;
	backdrop-filter: blur(10px);
}

.login-header {
	text-align: center;
	margin-bottom: 2rem;
}

.login-header h1 {
	color: var(--text-light);
	font-weight: 600;
	margin-bottom: 0.5rem;
}

.login-header p {
	color: var(--text-muted);
	margin: 0;
}

.form-floating { margin-bottom: 1rem; }
.form-floating .form-control {
	background-color: var(--bs-body-bg);
	border: 1px solid var(--bs-border-color);
	color: var(--text-dark);
}
.form-floating .form-control:focus {
	background-color: var(--bs-body-bg);
	border-color: var(--bs-primary);
	color: var(--text-dark);
	box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
}
.form-floating label { color: var(--text-muted); }

.btn-login { width: 100%; padding: 0.75rem; }
.btn-login:disabled { opacity: 0.6; transform: none; }

.back-link { text-align: center; margin-top: 1rem; }
.back-link a { color: var(--text-light); text-decoration: none; font-weight: 500; }
.back-link a:hover { text-decoration: underline; color: var(--text-dark); }

/* 3) 通用工具类 */
.mt-100 { margin-top: 100px; }
.text-theme-light { color: var(--text-light); }
/* 工具：统一阴影与圆角/玻璃态 */
.u-shadow { box-shadow: 0 4px 12px var(--bs-shadow-color); }
.u-shadow-lg { box-shadow: 0 6px 24px var(--bs-shadow-color); }
.u-rounded-10 { border-radius: 10px; }
.u-rounded-12 { border-radius: 12px; }
.u-glass {
	backdrop-filter: blur(10px);
	background-color: rgba(0, 0, 0, 0.15) !important;
	border: 1px solid var(--bs-border-color);
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
}
/* 工具：输入悬停/聚焦增强（将 .u-form 加在表单父容器上） */
.u-form input.form-control:hover,
.u-form select.form-select:hover { border-color: var(--bs-border-color); }
.u-form input.form-control:focus,
.u-form select.form-select:focus {
	background-color: var(--bs-body-bg);
	border-color: var(--bs-primary);
	box-shadow: 0 0 0 0.2rem rgba(var(--bs-primary-rgb), 0.25);
}
/* 工具：固定高度滚动容器 */
.scroll-y-400 { height: 400px; overflow-y: auto; }
/* 工具：宽度辅助 */
.u-w-auto { width: auto !important; }

.upload-area:hover, .upload-area.dragover {
    border-color: #8dd0ff;
    background-color: rgba(141, 208, 255, 0.1);
}

.upload-icon {
    font-size: 3.5rem;
    color: var(--brand-accent);
    margin-bottom: 15px;
}

/* 限定上传页区域，避免全局 .file-info 被覆盖 */
.upload-section .file-info {
    background: var(--bs-hover-color);
    border-radius: 10px;
    padding: 20px;
    margin-top: auto;
    border: 1px solid var(--bs-border-color);
}

.info-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px solid var(--bs-border-color);
}

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

.progress-container {
    margin: 25px 0;
}

.progress-bar {
    height: 12px;
    border-radius: 6px;
    transition: width 0.4s ease;
}

.upload-btn {
    background: linear-gradient(to right, rgba(67, 97, 238, 0.8), rgba(63, 55, 201, 0.8));
    border: 1px solid var(--bs-border-color);
    color: var(--text-light);
    padding: 12px 30px;
    font-weight: 600;
    letter-spacing: 0.5px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.upload-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.4);
    background: linear-gradient(to right, rgba(67, 97, 238, 1), rgba(63, 55, 201, 1));
    color: var(--text-light);
}

.result-section {
    padding: 20px;
    background: rgba(141, 208, 255, 0.1);
    border-radius: 12px;
    margin-top: 25px;
    display: none;
    border: 1px solid var(--bs-border-color);
}

.response-box {
    background: var(--bs-hover-color);
    border-radius: 8px;
    padding: 15px;
    font-family: monospace;
    font-size: 14px;
    max-height: 200px;
    overflow-y: auto;
    margin-top: 15px;
    border: 1px solid var(--bs-border-color);
    color: var(--text-light);
}

.file-preview {
    max-width: 100%;
    max-height: 150px;
    border-radius: 8px;
    margin-top: 15px;
    display: none;
}

/* 状态和加载样式 */
.spinner-container {
    display: flex;
    justify-content: center;
    padding: 2rem;
    flex-direction: column;
    align-items: center;
}

.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-light);
}

.empty-state i {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 4px solid var(--bs-border-color);
    border-radius: 50%;
    animation: app-preloader-spin 1s linear infinite;
    margin-bottom: 1rem;
}

/* 统一使用 app-preloader-spin 动画，上方已定义 */

/* 分页和统计样式 */
.page-size-selector {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-right: 1rem;
}

.pagination-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 0.5rem 0 0.5rem 0;
}

#pageSizeInfo {
    border: 1px solid var(--bs-border-color);
    transition: all 0.3s ease;
    background-color: rgba(0, 0, 0, 0.15) !important;
    color: var(--text-light);
}

#pageSizeInfo:hover {
    border: 1px solid var(--bs-border-color);
    background-color: var(--bs-hover-color) !important;
    color: var(--text-light);
}

#changePageSize5, #changePageSize10, #changePageSize20 {
    border: 1px solid var(--bs-border-color);
    transition: all 0.3s ease;
    background-color: rgba(0, 0, 0, 0.15) !important;
    color: var(--text-light);
}

#changePageSize5:hover, #changePageSize10:hover, #changePageSize20:hover {
    border: 1px solid var(--bs-border-color);
    background-color: var(--bs-hover-color) !important;
    color: var(--text-light);
}

/* 分页按钮样式 */
[data-bs-theme="transparent"] .pagination .page-link {
    background-color: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--bs-border-color);
    color: var(--text-light);
    transition: all 0.3s ease;
}

[data-bs-theme="transparent"] .pagination .page-link:hover {
    background-color: var(--bs-hover-color);
    border-color: var(--bs-border-color);
    color: var(--text-light);
    transform: translateY(-1px);
}

[data-bs-theme="transparent"] .pagination .page-item.active .page-link {
    background-color: var(--bs-border-color);
    border-color: var(--bs-border-color);
    color: var(--text-dark);
    box-shadow: 0 2px 4px var(--bs-shadow-color);
}

[data-bs-theme="transparent"] .pagination .page-item.disabled .page-link {
    background-color: rgba(0, 0, 0, 0.05);
    border-color: var(--bs-border-color);
    color: var(--text-light);
    opacity: 0.5;
}

[data-bs-theme="transparent"] .pagination .page-item.disabled .page-link:hover {
    background-color: rgba(0, 0, 0, 0.05);
    border-color: var(--bs-border-color);
    color: var(--text-light);
    transform: none;
}

/* 下拉菜单样式 */
[data-bs-theme="transparent"] .dropdown-menu {
    background-color: rgba(0, 0, 0, 0.15);
    border: 1px solid var(--bs-border-color);
    backdrop-filter: blur(10px);
}

[data-bs-theme="transparent"] .dropdown-item {
    color: var(--text-light);
    transition: all 0.3s ease;
}

[data-bs-theme="transparent"] .dropdown-item:hover {
    background-color: var(--bs-hover-color);
    color: var(--text-light);
}

/* 统一文本弱化色，避免各页重复覆盖 */
[data-bs-theme="transparent"] .text-muted {
	color: var(--text-muted) !important;
}

/* 全局页面前置加载遮罩 */
.app-preloader {
    position: fixed;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(4px);
    z-index: 2147483647; /* 始终置顶 */
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.app-preloader-hide {
    opacity: 0;
    visibility: hidden;
}

.app-preloader-spinner {
    width: 56px;
    height: 56px;
    border: 4px solid var(--bs-border-color);
    border-top-color: var(--brand-accent);
    border-radius: 50%;
    animation: loading-spin 1s linear infinite;
    margin-bottom: 12px;
}

.app-preloader-text {
    color: var(--text-light);
    letter-spacing: 0.5px;
}

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

/* 通用加载遮罩（页面列表加载、表格遮罩等） */
.loading-overlay {
	position: absolute;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	background-color: rgba(0, 0, 0, 0.15);
	backdrop-filter: blur(10px);
	z-index: 1000;
	display: flex;
	align-items: center;
	justify-content: center;
	border-radius: 0.375rem;
	opacity: 0;
	transition: opacity 0.3s ease;
}

.loading-overlay.show { opacity: 1; }

.loading-content {
	text-align: center;
	padding: 2rem;
	background-color: rgba(0, 0, 0, 0.15);
	border: 1px solid var(--bs-border-color);
	border-radius: 12px;
	box-shadow: 0 5px 15px var(--bs-shadow-color);
	backdrop-filter: blur(10px);
	transform: scale(0.9);
	transition: transform 0.3s ease;
}

.loading-overlay.show .loading-content { transform: scale(1); }

.loading-text {
	color: var(--text-light);
	font-size: 1.1rem;
	font-weight: 500;
	margin-top: 1rem;
}

.loading-spinner {
    width: 3rem;
    height: 3rem;
    border: 4px solid var(--bs-border-color);
    border-top-color: var(--brand-accent);
    border-radius: 50%;
    animation: loading-spin 1s linear infinite;
    margin: 0 auto;
}

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

.stats-container {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--bs-border-color);
}

#refreshBtn {
    border-color: var(--bs-border-color);
    color: var(--text-light);
}

#refreshBtn:hover {
    color: var(--bs-border-color);
}

/* 警告框样式 */
.alert-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1050;
    min-width: 300px;
}

.alert {
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.15);
    border: none;
    animation: slideIn 0.5s forwards;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* 输入框样式 */
#searchInput::placeholder {
    color: var(--bs-body-color);
    opacity: 0.8;
}

/* 响应式调整 */
@media (min-width: 768px) {
    .header {
        height: auto;
        margin-bottom: 2rem;
    }

    .file-item {
        flex-direction: row;
        align-items: center;
    }

    .file-icon {
        width: 70px;
        height: 70px;
        font-size: 2rem;
        margin-right: 1rem;
    }

    .file-icon-container {
        margin-bottom: 0;
    }

    .btn-download {
        width: auto;
        margin-top: 0;
        margin-left: 1rem;
    }

    .file-meta {
        margin-top: 0.5rem;
    }

    .pagination-controls {
        flex-direction: row;
        justify-content: center;
    }

    .page-size-selector {
        margin-bottom: 0;
        margin-right: 1rem;
    }
}

/* =============== 页面级主题：文件列表（下载页） =============== */
.file-actions {
	display: flex;
	flex-direction: column;
	gap: 0.5rem;
	align-items: flex-end;
}

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

/* 筛选按钮与输入框等高 */
.type-filter .btn {
	height: calc(1.5em + .75rem + 2px);
	padding-top: .375rem;
	padding-bottom: .375rem;
	padding-left: .75rem;
	padding-right: .75rem;
	display: inline-flex;
	align-items: center;
	white-space: nowrap;
	min-width: 56px;
}

/* 删除冗余：.btn-edit/.btn-delete 已并入共享按钮样式 */

/* 登录/登出按钮通用外观与行内适配 */
/* 删除冗余：.btn-login/.btn-logout 已并入共享按钮样式 */

.btn-inline-auto { width: auto !important; display: inline-flex !important; }

/* =============== 页面级主题：上传页 =============== */
.input-group-prepend-fixed-70 { width: 70px; }
.input-group-prepend-fixed-70 > .input-group-text { width: 100%; text-align: center; }

/* =============== 页面级主题：用户管理 & 审计日志 =============== */
.user-card,
.log-card { transition: transform 0.2s; }
.user-card:hover,
.log-card:hover { transform: translateY(-2px); }

.status-badge,
.action-badge,
.result-badge { font-size: 0.8em; }
.permission-tag { font-size: 0.75em; margin: 2px; }
.action-buttons { white-space: nowrap; }

.search-filters {
	background: rgba(255, 255, 255, 0.1);
	border-radius: 10px;
	padding: 20px;
	margin-bottom: 20px;
}

.log-detail {
	font-family: 'Courier New', monospace;
	font-size: 0.9em;
	background: rgba(0, 0, 0, 0.1);
	border-radius: 5px;
	padding: 10px;
	margin-top: 10px;
}

.statistics-card {
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: white;
	border-radius: 10px;
	padding: 20px;
	margin-bottom: 20px;
}

.stat-item { text-align: center; padding: 10px; }
.stat-number { font-size: 2em; font-weight: bold; }
.stat-label { font-size: 0.9em; opacity: 0.8; }

/* 4) 页面级样式：权限管理 */
.permission-card { transition: transform 0.2s; }
.permission-card:hover { transform: translateY(-2px); }
.permission-type-badge { font-size: 0.8em; }
.operation-type-badge { font-size: 0.75em; }
.module-section { margin-bottom: 30px; }
.module-header {
	background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
	color: #fff;
	padding: 15px;
	border-radius: 10px 10px 0 0;
	margin-bottom: 0;
}
.permission-grid {
	display: grid;
	grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
	gap: 15px;
	padding: 15px;
	background: rgba(255, 255, 255, 0.05);
	border-radius: 0 0 10px 10px;
}

/* 4) 页面级样式：系统管理 */
.option-link { text-decoration: none; color: inherit; display: block; }
.option-card {
	display: flex; align-items: center; justify-content: center; flex-direction: column; gap: .5rem;
	border: 1px solid var(--bs-border-color);
	backdrop-filter: blur(10px);
	background-color: rgba(0, 0, 0, 0.15) !important;
	box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
	border-radius: 12px; transition: transform .2s ease, box-shadow .2s ease, background-color .2s ease;
	/* 1:1 方形 */
	aspect-ratio: 1 / 1; width: 100%;
	min-height: 180px;
}
.option-card:hover { transform: translateY(-2px); background-color: var(--bs-hover-color) !important; box-shadow: 0 6px 24px var(--bs-shadow-color); }
.option-icon { font-size: 2.2rem; color: var(--brand-accent); }
.option-label { font-weight: 600; color: var(--text-light); letter-spacing: .5px; }

@media (min-width: 992px) {
    .file-icon {
        width: 80px;
        height: 80px;
        font-size: 2.5rem;
    }

    .file-name {
        font-size: 1.2rem;
    }
}

/* 移动端调整 */
@media (max-width: 767px) {
    .header .d-flex {
        flex-direction: column;
    }

    .header h1 {
        text-align: center;
        margin-bottom: 1rem;
    }

    .header .input-group {
        width: 100%;
    }

    .card {
        margin-bottom: 1rem;
    }

    .file-info-row {
        flex-direction: column;
    }

    .file-info-label {
        margin-bottom: 0.2rem;
    }

    .upload-container {
        margin: 0 15px;
    }

    .header-section {
        padding: 20px 15px;
    }

    .upload-section {
        padding: 20px 15px;
    }
}