/* ===========================================
   回响影像 · 素材共享平台
   商务正式风格 - 深蓝灰单一色调设计系统
   =========================================== */

/* ===== CSS Variables · 主题色板 ===== */
:root {
    /* 主色阶 - 深蓝灰（Slate Blue）商务正式 */
    --c-50:  #f0f4f8;
    --c-100: #d9e2ec;
    --c-200: #bcccdc;
    --c-300: #9fb3c8;
    --c-400: #829ab1;
    --c-500: #627d98;
    --c-600: #486581;
    --c-700: #334e68;
    --c-800: #243b53;
    --c-900: #102a43;

    /* 语义色 */
    --color-primary:        var(--c-800);
    --color-primary-dark:   var(--c-900);
    --color-primary-light:  var(--c-600);
    --color-accent:         var(--c-700);

    /* 中性色 */
    --color-bg:           #f5f7fa;
    --color-bg-soft:      #eef2f7;
    --color-surface:      #ffffff;
    --color-surface-alt:  #fafbfc;

    /* 文字色 */
    --color-text:         #1a202c;
    --color-text-soft:    #4a5568;
    --color-text-muted:   #718096;
    --color-text-inverse: #ffffff;

    /* 边框与分隔 */
    --color-border:        #e2e8f0;
    --color-border-strong: #cbd5e0;
    --color-divider:       #edf2f7;

    /* 状态色（保持低饱和度，统一商务气质） */
    --color-success: #2f855a;
    --color-warning: #c05621;
    --color-danger:  #9b2c2c;
    --color-info:    var(--c-600);

    /* 阴影 */
    --shadow-xs: 0 1px 2px 0 rgba(16, 42, 67, 0.04);
    --shadow-sm: 0 1px 3px 0 rgba(16, 42, 67, 0.08), 0 1px 2px 0 rgba(16, 42, 67, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(16, 42, 67, 0.08), 0 2px 4px -1px rgba(16, 42, 67, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(16, 42, 67, 0.10), 0 4px 6px -2px rgba(16, 42, 67, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(16, 42, 67, 0.12), 0 10px 10px -5px rgba(16, 42, 67, 0.04);

    /* 圆角 */
    --radius-sm: 4px;
    --radius:    6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* 间距 */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;

    /* 字号 */
    --text-xs: 12px;
    --text-sm: 13px;
    --text-base: 14px;
    --text-md: 15px;
    --text-lg: 16px;
    --text-xl: 18px;
    --text-2xl: 22px;
    --text-3xl: 28px;
    --text-4xl: 36px;

    /* 过渡 */
    --transition: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* 布局 */
    --sidebar-width: 240px;
    --header-height: 64px;
    --content-max-width: 1440px;
}

/* ===== Reset ===== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html, body {
    height: 100%;
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei",
                 "Segoe UI", "Helvetica Neue", Arial, sans-serif;
    font-size: var(--text-base);
    line-height: 1.5;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

button, input, select, textarea {
    font: inherit;
    color: inherit;
}

button {
    background: none;
    border: none;
    cursor: pointer;
}

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--color-primary-dark);
}

img {
    max-width: 100%;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ===== 通用排版 ===== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.3;
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

.text-muted   { color: var(--color-text-muted); }
.text-soft    { color: var(--color-text-soft); }
.text-small   { font-size: var(--text-sm); }
.text-tiny    { font-size: var(--text-xs); }
.text-center  { text-align: center; }
.text-right   { text-align: right; }
.font-medium  { font-weight: 500; }
.font-semibold{ font-weight: 600; }
.font-bold    { font-weight: 700; }

.divider {
    height: 1px;
    background: var(--color-divider);
    margin: var(--space-4) 0;
}

.flex { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center { align-items: center; }
.items-start  { align-items: flex-start; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-1 { gap: var(--space-1); }
.gap-2 { gap: var(--space-2); }
.gap-3 { gap: var(--space-3); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.flex-1 { flex: 1; }
.w-full { width: 100%; }

/* ===== 按钮组件 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: 8px 16px;
    font-size: var(--text-base);
    font-weight: 500;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    white-space: nowrap;
    user-select: none;
    line-height: 1.4;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--color-primary);
    color: var(--color-text-inverse);
    border-color: var(--color-primary);
}
.btn-primary:hover:not(:disabled) {
    background: var(--color-primary-dark);
    border-color: var(--color-primary-dark);
    box-shadow: var(--shadow-sm);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text);
    border-color: var(--color-border-strong);
}
.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-soft);
    border-color: var(--color-primary-light);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-soft);
    border-color: transparent;
}
.btn-ghost:hover:not(:disabled) {
    background: var(--color-bg-soft);
    color: var(--color-text);
}

.btn-danger {
    background: var(--color-surface);
    color: var(--color-danger);
    border-color: var(--color-border-strong);
}
.btn-danger:hover:not(:disabled) {
    background: #fef5f5;
    border-color: var(--color-danger);
}

.btn-sm {
    padding: 4px 10px;
    font-size: var(--text-sm);
}
.btn-lg {
    padding: 12px 24px;
    font-size: var(--text-lg);
}
.btn-block {
    width: 100%;
}

.btn-icon {
    padding: 8px;
    width: 36px;
    height: 36px;
}

/* ===== 表单组件 ===== */
.form-group {
    margin-bottom: var(--space-4);
}

.form-label {
    display: block;
    margin-bottom: var(--space-2);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
}

.form-label .required {
    color: var(--color-danger);
    margin-left: 2px;
}

.form-control {
    display: block;
    width: 100%;
    padding: 9px 12px;
    font-size: var(--text-base);
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    transition: all var(--transition);
    line-height: 1.4;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(36, 59, 83, 0.10);
}

.form-control::placeholder {
    color: var(--color-text-muted);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%23486581' d='M6 8L0 0h12z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
    cursor: pointer;
}

textarea.form-control {
    min-height: 100px;
    resize: vertical;
    font-family: inherit;
}

.form-hint {
    margin-top: 4px;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.form-error {
    margin-top: 4px;
    font-size: var(--text-xs);
    color: var(--color-danger);
}

/* ===== 卡片 ===== */
.card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xs);
    transition: box-shadow var(--transition);
}

.card:hover {
    box-shadow: var(--shadow-sm);
}

.card-header {
    padding: var(--space-5) var(--space-6);
    border-bottom: 1px solid var(--color-divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    color: var(--color-text);
}

.card-body {
    padding: var(--space-6);
}

.card-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-divider);
    background: var(--color-surface-alt);
    border-radius: 0 0 var(--radius-md) var(--radius-md);
}

/* ===== 徽章 ===== */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 2px 8px;
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: 999px;
    line-height: 1.5;
    background: var(--c-100);
    color: var(--c-800);
    border: 1px solid transparent;
}

.badge-primary { background: var(--c-100); color: var(--c-800); }
.badge-success { background: #e6f4ed; color: var(--color-success); }
.badge-warning { background: #fef0e8; color: var(--color-warning); }
.badge-danger  { background: #fbeaea; color: var(--color-danger); }
.badge-info    { background: var(--c-100); color: var(--c-700); }

.badge-outline {
    background: transparent;
    border-color: var(--color-border-strong);
    color: var(--color-text-soft);
}

/* ===== 表格 ===== */
.table-wrapper {
    overflow-x: auto;
    background: var(--color-surface);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
}

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: var(--text-base);
}

.table th {
    text-align: left;
    padding: var(--space-3) var(--space-4);
    background: var(--color-bg-soft);
    color: var(--color-text-soft);
    font-weight: 600;
    font-size: var(--text-sm);
    border-bottom: 1px solid var(--color-border);
    white-space: nowrap;
}

.table td {
    padding: var(--space-3) var(--space-4);
    border-bottom: 1px solid var(--color-divider);
    color: var(--color-text);
    vertical-align: middle;
}

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

.table tbody tr:hover {
    background: var(--color-surface-alt);
}

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

/* ===== Toast 提示 ===== */
#toast-container {
    position: fixed;
    top: var(--space-6);
    right: var(--space-6);
    z-index: 9999;
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.toast {
    min-width: 280px;
    padding: var(--space-3) var(--space-4);
    background: var(--color-surface);
    border-left: 3px solid var(--color-primary);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: var(--text-sm);
    animation: slideIn 0.3s ease;
}

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

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

/* ===== 模态框 ===== */
.modal-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(16, 42, 67, 0.45);
    backdrop-filter: blur(2px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    animation: fadeIn 0.2s ease;
}

.modal {
    background: var(--color-surface);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-xl);
    max-width: 560px;
    width: 100%;
    max-height: 90vh;
    display: flex;
    flex-direction: column;
    animation: scaleIn 0.2s ease;
}

.modal.modal-lg { max-width: 800px; }
.modal.modal-xl { max-width: 1100px; }

.modal-header {
    padding: var(--space-4) var(--space-6);
    border-bottom: 1px solid var(--color-divider);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title {
    font-size: var(--text-lg);
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-muted);
    transition: all var(--transition);
}

.modal-close:hover {
    background: var(--color-bg-soft);
    color: var(--color-text);
}

.modal-body {
    padding: var(--space-6);
    overflow-y: auto;
    flex: 1;
}

.modal-footer {
    padding: var(--space-4) var(--space-6);
    border-top: 1px solid var(--color-divider);
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}
@keyframes scaleIn {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 1; transform: scale(1); }
}

/* ===========================================
   登录页
   =========================================== */
.login-page {
    min-height: 100vh;
    display: flex;
    background: var(--color-bg);
}

.login-side {
    flex: 1;
    background: linear-gradient(135deg, var(--c-800) 0%, var(--c-900) 100%);
    color: var(--color-text-inverse);
    padding: var(--space-16);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.login-side::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(255,255,255,0.05) 0%, transparent 70%);
    border-radius: 50%;
}

.login-side::after {
    content: '';
    position: absolute;
    bottom: -150px;
    left: -150px;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(255,255,255,0.03) 0%, transparent 70%);
    border-radius: 50%;
}

.login-brand {
    position: relative;
    z-index: 1;
}

.login-brand-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    margin-bottom: var(--space-2);
}

.login-brand-mark {
    width: 44px;
    height: 44px;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: #fff;
    letter-spacing: -0.5px;
}

.login-brand-name {
    font-size: var(--text-xl);
    font-weight: 600;
    color: #fff;
    letter-spacing: 0.5px;
}

.login-side-content {
    position: relative;
    z-index: 1;
    max-width: 480px;
}

.login-side-title {
    font-size: var(--text-4xl);
    font-weight: 600;
    line-height: 1.25;
    color: #fff;
    margin-bottom: var(--space-5);
    letter-spacing: -0.5px;
}

.login-side-subtitle {
    font-size: var(--text-md);
    line-height: 1.7;
    color: var(--c-200);
}

.login-side-features {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.login-side-feature {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    color: var(--c-100);
    font-size: var(--text-sm);
}

.login-side-feature-dot {
    width: 6px;
    height: 6px;
    background: var(--c-300);
    border-radius: 50%;
    flex-shrink: 0;
}

.login-form-wrap {
    flex: 1;
    max-width: 520px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: var(--space-12);
}

.login-form-header {
    margin-bottom: var(--space-8);
}

.login-form-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.login-form-subtitle {
    color: var(--color-text-muted);
    font-size: var(--text-base);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.login-accounts {
    margin-top: var(--space-6);
    padding: var(--space-4);
    background: var(--color-bg-soft);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.login-accounts-title {
    font-size: var(--text-xs);
    font-weight: 600;
    color: var(--color-text-soft);
    margin-bottom: var(--space-2);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.login-account-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.login-account-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 8px;
    font-size: var(--text-xs);
    color: var(--color-text-soft);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition);
}

.login-account-item:hover {
    background: var(--color-surface);
}

.login-account-role {
    color: var(--color-text-muted);
}

/* ===========================================
   主布局
   =========================================== */
.app-layout {
    display: flex;
    min-height: 100vh;
}

/* 侧边栏 */
.sidebar {
    width: var(--sidebar-width);
    background: var(--c-900);
    color: var(--c-200);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    z-index: 100;
    transition: transform var(--transition-slow);
}

.sidebar-header {
    height: var(--header-height);
    padding: 0 var(--space-5);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.sidebar-logo {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, var(--c-500), var(--c-300));
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-900);
    font-weight: 700;
    font-size: 14px;
}

.sidebar-brand {
    color: #fff;
    font-size: var(--text-md);
    font-weight: 600;
    letter-spacing: 0.3px;
}

.sidebar-nav {
    flex: 1;
    padding: var(--space-4) var(--space-3);
    overflow-y: auto;
}

.sidebar-section-title {
    padding: var(--space-3) var(--space-3) var(--space-2);
    font-size: var(--text-xs);
    color: var(--c-500);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    font-weight: 600;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: 10px var(--space-3);
    color: var(--c-300);
    border-radius: var(--radius);
    font-size: var(--text-base);
    cursor: pointer;
    transition: all var(--transition);
    margin-bottom: 2px;
}

.sidebar-item:hover {
    background: rgba(255,255,255,0.05);
    color: #fff;
}

.sidebar-item.active {
    background: var(--c-700);
    color: #fff;
    font-weight: 500;
}

.sidebar-item-icon {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.sidebar-item-badge {
    margin-left: auto;
    background: var(--c-600);
    color: #fff;
    font-size: var(--text-xs);
    padding: 1px 6px;
    border-radius: 999px;
    font-weight: 500;
}

.sidebar-footer {
    padding: var(--space-3);
    border-top: 1px solid rgba(255,255,255,0.08);
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    border-radius: var(--radius);
    cursor: pointer;
    transition: background var(--transition);
}

.sidebar-user:hover {
    background: rgba(255,255,255,0.05);
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--c-600);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.sidebar-user-info {
    flex: 1;
    min-width: 0;
}

.sidebar-user-name {
    color: #fff;
    font-size: var(--text-sm);
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sidebar-user-role {
    color: var(--c-400);
    font-size: var(--text-xs);
}

/* 主内容区 */
.main-content {
    flex: 1;
    margin-left: var(--sidebar-width);
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    transition: margin-left var(--transition-slow);
}

.topbar {
    height: var(--header-height);
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-border);
    padding: 0 var(--space-6);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    flex: 1;
}

.topbar-toggle {
    display: none;
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    align-items: center;
    justify-content: center;
    color: var(--color-text-soft);
}

.topbar-toggle:hover {
    background: var(--color-bg-soft);
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.breadcrumb-current {
    color: var(--color-text);
    font-weight: 500;
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.search-box {
    position: relative;
    width: 320px;
    max-width: 100%;
}

.search-box input {
    width: 100%;
    padding: 8px 12px 8px 36px;
    background: var(--color-bg-soft);
    border: 1px solid transparent;
    border-radius: var(--radius);
    font-size: var(--text-sm);
    color: var(--color-text);
    transition: all var(--transition);
}

.search-box input:focus {
    outline: none;
    background: var(--color-surface);
    border-color: var(--color-primary);
}

.search-box-icon {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-muted);
    pointer-events: none;
}

.topbar-icon-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-soft);
    position: relative;
    transition: all var(--transition);
}

.topbar-icon-btn:hover {
    background: var(--color-bg-soft);
    color: var(--color-text);
}

.topbar-icon-dot {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 7px;
    height: 7px;
    background: var(--color-danger);
    border: 2px solid var(--color-surface);
    border-radius: 50%;
}

.page-content {
    flex: 1;
    padding: var(--space-6);
    max-width: var(--content-max-width);
    width: 100%;
    margin: 0 auto;
}

.page-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: var(--space-6);
    gap: var(--space-4);
    flex-wrap: wrap;
}

.page-title-group {
    flex: 1;
    min-width: 0;
}

.page-title {
    font-size: var(--text-2xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 4px;
    letter-spacing: -0.3px;
}

.page-subtitle {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
}

.page-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ===========================================
   仪表盘
   =========================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--space-4);
    margin-bottom: var(--space-6);
}

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 3px;
    height: 100%;
    background: var(--color-primary);
}

.stat-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--space-3);
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    font-weight: 500;
}

.stat-icon {
    width: 32px;
    height: 32px;
    border-radius: var(--radius);
    background: var(--c-100);
    color: var(--c-700);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-value {
    font-size: var(--text-3xl);
    font-weight: 600;
    color: var(--color-text);
    line-height: 1.2;
    letter-spacing: -0.5px;
}

.stat-meta {
    margin-top: var(--space-2);
    display: flex;
    align-items: center;
    gap: var(--space-1);
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.stat-trend {
    color: var(--color-success);
    font-weight: 500;
}
.stat-trend.down { color: var(--color-danger); }

.dashboard-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--space-4);
}

.dashboard-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-5) var(--space-6);
}

.dashboard-card-title {
    font-size: var(--text-lg);
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text);
}

/* 简易柱状图 */
.bar-chart {
    display: flex;
    align-items: flex-end;
    gap: var(--space-3);
    height: 200px;
    padding-top: var(--space-4);
}

.bar-item {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.bar-fill {
    width: 100%;
    background: linear-gradient(180deg, var(--c-600) 0%, var(--c-800) 100%);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    transition: all var(--transition);
    min-height: 4px;
}

.bar-fill:hover {
    background: linear-gradient(180deg, var(--c-500) 0%, var(--c-700) 100%);
}

.bar-label {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ===========================================
   素材库
   =========================================== */
.filters-bar {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-4);
    margin-bottom: var(--space-4);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.filter-group {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.filter-label {
    font-size: var(--text-sm);
    color: var(--color-text-soft);
    white-space: nowrap;
}

.filter-select,
.filter-input {
    padding: 6px 10px;
    font-size: var(--text-sm);
    border: 1px solid var(--color-border-strong);
    border-radius: var(--radius);
    background: var(--color-surface);
    color: var(--color-text);
    min-width: 140px;
    transition: border-color var(--transition);
}

.filter-select:focus,
.filter-input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.view-toggle {
    display: flex;
    background: var(--color-bg-soft);
    border-radius: var(--radius);
    padding: 2px;
    margin-left: auto;
}

.view-toggle-btn {
    padding: 6px 12px;
    border-radius: var(--radius-sm);
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    gap: 4px;
}

.view-toggle-btn.active {
    background: var(--color-surface);
    color: var(--color-primary);
    box-shadow: var(--shadow-xs);
}

/* 网格视图 */
.materials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: var(--space-4);
}

.material-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    cursor: pointer;
    transition: all var(--transition);
    display: flex;
    flex-direction: column;
}

.material-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
    border-color: var(--c-300);
}

.material-card-delete {
    position: absolute;
    top: 8px;
    right: 8px;
    width: 28px;
    height: 28px;
    border: none;
    background: rgba(255, 255, 255, 0.92);
    color: var(--color-danger, #dc2626);
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.2s ease, background 0.2s ease, transform 0.15s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.18);
    z-index: 2;
}

.material-card:hover .material-card-delete {
    opacity: 1;
}

.material-card-delete:hover {
    background: var(--color-danger, #dc2626);
    color: #fff;
    transform: scale(1.08);
}

/* ===== 素材复选框（批量） ===== */
.material-card { position: relative; }
.material-check {
    position: absolute;
    top: 8px;
    left: 8px;
    z-index: 3;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 22px;
    height: 22px;
    margin: 0;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.9);
    border-radius: 4px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    opacity: 0;
    transition: opacity 0.2s ease;
}
.material-card:hover .material-check,
.material-card.selected .material-check {
    opacity: 1;
}
.material-check input[type=checkbox] {
    width: 14px;
    height: 14px;
    margin: 0;
    cursor: pointer;
    accent-color: var(--color-primary, var(--c-600));
}
.material-card.selected {
    outline: 2px solid var(--color-primary, var(--c-600));
    outline-offset: -2px;
    box-shadow: var(--shadow-md);
}
.material-check:has(input:checked) {
    opacity: 1 !important;
    background: var(--color-primary, var(--c-600));
}
.material-check:has(input:checked) input {
    filter: invert(1);
}

/* ===== 批量操作工具栏 ===== */
.batch-toolbar {
    display: none;
    align-items: center;
    gap: var(--space-4);
    padding: 10px 16px;
    margin-bottom: var(--space-4);
    background: var(--color-primary-soft, rgba(99, 102, 241, 0.08));
    border: 1px solid var(--color-primary, var(--c-600));
    border-radius: 8px;
    flex-wrap: wrap;
}
.batch-toolbar.active {
    display: flex;
}
.batch-toolbar-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex: 0 0 auto;
}
.batch-select-all {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    cursor: pointer;
    user-select: none;
    font-weight: 500;
    color: var(--color-text, inherit);
}
.batch-select-all input {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--color-primary, var(--c-600));
}
.batch-count {
    color: var(--color-text-muted);
    font-size: 13px;
}
.batch-toolbar-actions {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    flex: 1;
    flex-wrap: wrap;
    justify-content: flex-end;
}
@media (max-width: 768px) {
    .batch-toolbar { flex-direction: column; align-items: stretch; }
    .batch-toolbar-actions { justify-content: flex-start; }
}

.material-thumb {
    aspect-ratio: 4 / 3;
    background: var(--color-bg-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    color: var(--c-500);
}

.material-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.material-type-icon {
    font-size: 48px;
    color: var(--c-400);
}

.material-type-badge {
    position: absolute;
    top: var(--space-2);
    left: var(--space-2);
    background: rgba(16, 42, 67, 0.85);
    color: #fff;
    font-size: var(--text-xs);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    font-weight: 500;
    letter-spacing: 0.5px;
}

.material-info {
    padding: var(--space-3) var(--space-4);
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.material-name {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.material-meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.material-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 4px;
    margin-top: 4px;
}

.material-tag {
    font-size: var(--text-xs);
    padding: 1px 6px;
    background: var(--c-50);
    color: var(--c-700);
    border-radius: 3px;
}

/* 列表视图 */
.materials-list .table tr {
    cursor: pointer;
}

.material-name-cell {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.material-thumb-sm {
    width: 40px;
    height: 40px;
    background: var(--color-bg-soft);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--c-500);
    flex-shrink: 0;
    overflow: hidden;
}

.material-thumb-sm img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 分页 */
.pagination {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: var(--space-5);
    padding: var(--space-3) 0;
    flex-wrap: wrap;
    gap: var(--space-3);
}

.pagination-info {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
}

.pagination-controls {
    display: flex;
    align-items: center;
    gap: 4px;
}

.pagination-btn {
    min-width: 32px;
    height: 32px;
    padding: 0 8px;
    border: 1px solid var(--color-border-strong);
    background: var(--color-surface);
    color: var(--color-text-soft);
    border-radius: var(--radius);
    font-size: var(--text-sm);
    transition: all var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pagination-btn:hover:not(:disabled):not(.active) {
    background: var(--color-bg-soft);
    color: var(--color-text);
}

.pagination-btn.active {
    background: var(--color-primary);
    color: #fff;
    border-color: var(--color-primary);
}

.pagination-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* ===========================================
   素材详情
   =========================================== */
.detail-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: var(--space-5);
}

.detail-preview {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--space-5);
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.detail-preview img,
.detail-preview video {
    max-width: 100%;
    max-height: 600px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
}

.detail-side {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.detail-meta-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.detail-meta-item {
    display: flex;
    justify-content: space-between;
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
    border-bottom: 1px solid var(--color-divider);
}

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

.detail-meta-key {
    color: var(--color-text-muted);
}

.detail-meta-value {
    color: var(--color-text);
    font-weight: 500;
}

.version-list {
    display: flex;
    flex-direction: column;
}

.version-item {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-divider);
}

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

.version-marker {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--c-700);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-xs);
    font-weight: 600;
    flex-shrink: 0;
    margin-top: 2px;
}

.version-marker.current {
    background: var(--color-primary);
    box-shadow: 0 0 0 3px var(--c-100);
}

.version-info {
    flex: 1;
}

.version-title {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: 2px;
}

.version-meta {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.version-actions {
    display: flex;
    gap: 4px;
}

/* ===========================================
   上传
   =========================================== */
.upload-zone {
    border: 2px dashed var(--color-border-strong);
    border-radius: var(--radius-md);
    padding: var(--space-12);
    text-align: center;
    background: var(--color-surface);
    transition: all var(--transition);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-primary);
    background: var(--c-50);
}

.upload-icon {
    font-size: 56px;
    color: var(--c-400);
    margin-bottom: var(--space-4);
}

.upload-title {
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.upload-hint {
    color: var(--color-text-muted);
    font-size: var(--text-sm);
    margin-bottom: var(--space-4);
}

.upload-formats {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-top: var(--space-4);
}

.format-chip {
    padding: 2px 8px;
    background: var(--c-50);
    color: var(--c-700);
    border-radius: var(--radius-sm);
    font-size: var(--text-xs);
    font-weight: 500;
    font-family: monospace;
}

.upload-list {
    margin-top: var(--space-4);
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.upload-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
}

.upload-item-icon {
    width: 40px;
    height: 40px;
    background: var(--c-100);
    color: var(--c-700);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.upload-item-info {
    flex: 1;
    min-width: 0;
}

.upload-item-name {
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--color-text);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.upload-item-meta {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

.upload-item-progress {
    height: 6px;
    background: var(--color-bg-soft);
    border-radius: 3px;
    overflow: hidden;
    margin-top: 8px;
    position: relative;
}

.upload-item-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light, var(--c-500)));
    border-radius: 3px;
    transition: width 0.3s ease;
}

.upload-item-status {
    font-size: var(--text-xs);
    color: var(--color-success);
    font-weight: 500;
}

.upload-item-status.error {
    color: var(--color-danger);
}

/* ===========================================
   分类与标签
   =========================================== */
.category-tree {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.category-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    transition: all var(--transition);
}

.category-item:hover {
    border-color: var(--c-300);
    box-shadow: var(--shadow-xs);
}

.category-item-icon {
    width: 36px;
    height: 36px;
    background: var(--c-100);
    color: var(--c-700);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.category-item-info {
    flex: 1;
    min-width: 0;
}

.category-item-name {
    font-size: var(--text-base);
    font-weight: 500;
    color: var(--color-text);
}

.category-item-desc {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    margin-top: 2px;
}

.category-item-count {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    background: var(--color-bg-soft);
    padding: 2px 10px;
    border-radius: 999px;
}

.category-item-actions {
    display: flex;
    gap: 4px;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--color-bg-soft);
    color: var(--color-text-soft);
    border: 1px solid var(--color-border);
    border-radius: 999px;
    font-size: var(--text-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.tag-pill:hover {
    background: var(--c-50);
    border-color: var(--c-300);
    color: var(--c-800);
}

.tag-pill-count {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    background: var(--color-surface);
    padding: 0 6px;
    border-radius: 999px;
}

/* ===========================================
   用户管理
   =========================================== */
.user-cell {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.user-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--c-600);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: var(--text-sm);
    flex-shrink: 0;
}

.user-avatar.avatar-xl {
    width: 80px;
    height: 80px;
    font-size: 28px;
}

.user-name-text {
    font-weight: 500;
    color: var(--color-text);
}

.user-email-text {
    font-size: 12px;
    color: var(--color-text-muted);
}

.detail-meta-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
    font-size: 13px;
}

.detail-meta-key {
    color: var(--color-text-muted);
}

.detail-meta-value {
    color: var(--color-text);
    font-weight: 500;
}

.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-pill {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 12px;
    background: var(--c-50);
    border: 1px solid var(--c-200);
    border-radius: 999px;
    color: var(--c-800);
    font-size: 13px;
}

.tag-pill-count {
    background: var(--c-600);
    color: #fff;
    border-radius: 999px;
    padding: 0 6px;
    font-size: 11px;
    font-weight: 500;
}

.version-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.version-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 14px 16px;
    background: var(--color-bg-soft);
    border-radius: 6px;
    border: 1px solid var(--color-border);
}

.version-marker {
    width: 48px;
    height: 48px;
    background: var(--c-100);
    color: var(--c-700);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 13px;
    flex-shrink: 0;
}

.version-marker.current {
    background: var(--c-600);
    color: #fff;
}

.version-info { flex: 1; }
.version-title { font-weight: 500; }
.version-meta { font-size: 12px; color: var(--color-text-muted); margin-top: 4px; }
.version-actions { display: flex; gap: 4px; }

.detail-side .card + .card { margin-top: 16px; }

.tabs {
    display: flex;
    border-bottom: 1px solid var(--color-divider);
    margin-bottom: 20px;
    gap: 4px;
}

.tab {
    padding: 10px 20px;
    cursor: pointer;
    color: var(--color-text-soft);
    font-weight: 500;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 6px;
}

.tab.active {
    color: var(--c-700);
    border-bottom-color: var(--c-600);
}

.tab-badge {
    background: var(--c-100);
    color: var(--c-700);
    border-radius: 10px;
    padding: 0 8px;
    font-size: 11px;
    font-weight: 600;
    min-width: 18px;
    text-align: center;
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 20px;
}

.detail-preview {
    background: var(--color-bg-soft);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 24px;
    min-height: 200px;
}

.material-info { padding: 12px 14px; }
.material-tags { display: flex; flex-wrap: wrap; gap: 6px; }
.material-tag {
    background: var(--c-50);
    color: var(--c-800);
    border: 1px solid var(--c-200);
    border-radius: 4px;
    padding: 2px 8px;
    font-size: 12px;
}

.badge-info { background: var(--c-100); color: var(--c-800); }
.badge-success { background: var(--c-100); color: var(--c-800); }
.badge-warning { background: var(--color-warning); color: #fff; }
.badge-danger { background: var(--color-danger); color: #fff; }
.badge-outline { background: transparent; color: var(--color-text-muted); border: 1px solid var(--color-border); }

.format-chip {
    display: inline-block;
    padding: 2px 10px;
    background: var(--c-50);
    color: var(--c-700);
    border: 1px solid var(--c-200);
    border-radius: 4px;
    font-size: 11px;
    font-weight: 500;
    font-family: monospace;
}

.upload-formats {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    justify-content: center;
    margin-top: 12px;
}

.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: 8px;
    padding: 60px 24px;
    text-align: center;
    cursor: pointer;
    transition: all 0.2s;
    background: var(--color-bg-soft);
}

.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--c-500);
    background: var(--c-50);
}

.upload-icon { color: var(--c-500); margin-bottom: 16px; }
.upload-title { font-size: 16px; font-weight: 500; margin-bottom: 4px; color: var(--color-text); }
.upload-hint { font-size: 13px; color: var(--color-text-muted); margin-bottom: 16px; }

.upload-list { margin-top: 16px; }

.upload-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: var(--color-bg-soft);
    border: 1px solid var(--color-border);
    border-radius: 6px;
    margin-bottom: 8px;
}

.upload-item-icon {
    width: 36px;
    height: 36px;
    background: var(--c-100);
    color: var(--c-700);
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.upload-item-info { flex: 1; }
.upload-item-name { font-size: 13px; font-weight: 500; }
.upload-item-meta { font-size: 12px; color: var(--color-text-muted); margin-top: 2px; }
.upload-item-progress { margin-top: 6px; height: 4px; background: var(--c-100); border-radius: 2px; overflow: hidden; }
.upload-item-progress-bar { height: 100%; background: var(--c-600); transition: width 0.3s; }
.upload-item-status { font-size: 12px; color: var(--color-text-muted); }

@media (max-width: 1024px) {
    .detail-grid { grid-template-columns: 1fr; }
}

.user-name-text {
    font-weight: 500;
    color: var(--color-text);
}

.user-email-text {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

.role-admin   { color: var(--color-danger); }
.role-manager { color: var(--color-warning); }
.role-editor  { color: var(--c-700); }
.role-viewer  { color: var(--color-text-muted); }

/* ===========================================
   日志
   =========================================== */
.log-entry {
    display: flex;
    align-items: flex-start;
    gap: var(--space-3);
    padding: var(--space-3) 0;
    border-bottom: 1px solid var(--color-divider);
}

.log-entry:last-child {
    border-bottom: none;
}

.log-check {
    margin-top: 4px;
    width: 16px;
    height: 16px;
    cursor: pointer;
    flex-shrink: 0;
    accent-color: var(--color-primary, var(--c-600));
}

.log-delete-btn {
    margin-left: auto;
    color: var(--color-danger, #dc2626);
    opacity: 0;
    transition: opacity 0.2s ease, background 0.2s ease;
}

.log-entry:hover .log-delete-btn {
    opacity: 1;
}

.log-delete-btn:hover {
    background: var(--color-danger, #dc2626) !important;
    color: #fff !important;
}

.log-time {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
    font-family: monospace;
    white-space: nowrap;
    min-width: 140px;
}

.log-action {
    display: inline-block;
    padding: 1px 8px;
    font-size: var(--text-xs);
    font-weight: 500;
    border-radius: 3px;
    background: var(--c-100);
    color: var(--c-800);
    text-transform: uppercase;
    letter-spacing: 0.3px;
    min-width: 70px;
    text-align: center;
}

.log-action.login    { background: #e6f4ed; color: var(--color-success); }
.log-action.upload   { background: var(--c-100); color: var(--c-800); }
.log-action.download { background: #eaf3fb; color: var(--c-700); }
.log-action.delete   { background: #fbeaea; color: var(--color-danger); }
.log-action.update   { background: #fef0e8; color: var(--color-warning); }

.log-message {
    flex: 1;
    font-size: var(--text-sm);
    color: var(--color-text);
}

.log-user {
    font-size: var(--text-xs);
    color: var(--color-text-muted);
}

/* ===========================================
   标签页
   =========================================== */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: var(--space-5);
    gap: var(--space-1);
}

.tab {
    padding: var(--space-3) var(--space-4);
    font-size: var(--text-base);
    color: var(--color-text-muted);
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all var(--transition);
    margin-bottom: -1px;
    font-weight: 500;
}

.tab:hover {
    color: var(--color-text);
}

.tab.active {
    color: var(--color-primary);
    border-bottom-color: var(--color-primary);
}

.tab-badge {
    display: inline-block;
    margin-left: 6px;
    padding: 1px 6px;
    background: var(--c-100);
    color: var(--c-700);
    font-size: var(--text-xs);
    border-radius: 999px;
    font-weight: 500;
}

/* ===========================================
   空状态
   =========================================== */
.empty-state {
    text-align: center;
    padding: var(--space-12) var(--space-6);
    color: var(--color-text-muted);
}

.empty-state-icon {
    font-size: 64px;
    color: var(--c-300);
    margin-bottom: var(--space-4);
}

.empty-state-title {
    font-size: var(--text-lg);
    font-weight: 500;
    color: var(--color-text);
    margin-bottom: var(--space-2);
}

.empty-state-text {
    font-size: var(--text-sm);
    color: var(--color-text-muted);
    max-width: 400px;
    margin: 0 auto var(--space-4);
}

/* ===========================================
   个人中心 / 设置
   =========================================== */
.profile-header {
    background: linear-gradient(135deg, var(--c-800) 0%, var(--c-900) 100%);
    color: #fff;
    padding: var(--space-8) var(--space-6);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-5);
    margin-bottom: var(--space-5);
}

.profile-avatar-lg {
    width: 80px;
    height: 80px;
    background: rgba(255,255,255,0.15);
    border: 2px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--text-2xl);
    font-weight: 600;
    flex-shrink: 0;
}

.profile-info h2 {
    color: #fff;
    margin-bottom: 4px;
}

.profile-info p {
    color: var(--c-200);
    font-size: var(--text-sm);
}

.profile-stats {
    display: flex;
    gap: var(--space-6);
    margin-top: var(--space-3);
}

.profile-stat {
    color: #fff;
}

.profile-stat-value {
    font-size: var(--text-xl);
    font-weight: 600;
}

.profile-stat-label {
    font-size: var(--text-xs);
    color: var(--c-300);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ===========================================
   响应式
   =========================================== */
@media (max-width: 1024px) {
    .detail-grid {
        grid-template-columns: 1fr;
    }

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

    .login-side {
        display: none;
    }

    .login-form-wrap {
        max-width: 100%;
    }
}

@media (max-width: 768px) {
    :root {
        --sidebar-width: 240px;
    }

    .sidebar {
        transform: translateX(-100%);
    }

    .sidebar.open {
        transform: translateX(0);
        box-shadow: var(--shadow-xl);
    }

    .main-content {
        margin-left: 0;
    }

    .topbar-toggle {
        display: flex;
    }

    .search-box {
        width: 200px;
    }

    .page-content {
        padding: var(--space-4);
    }

    .materials-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
    }

    .profile-header {
        flex-direction: column;
        text-align: center;
    }

    .profile-stats {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .search-box {
        display: none;
    }

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

    .filters-bar {
        flex-direction: column;
        align-items: stretch;
    }

    .view-toggle {
        margin-left: 0;
    }
}

/* 滚动条 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--c-300);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--c-400);
}