/* 后台统一样式表：由 variables/reset/typography/layout/components + 管理专用样式 合并
 * 级联顺序已固定。variables.css 与 reset.css 仍被 echoCriticalCSS() 单独内联用于首屏防 FOUC。 */

/* === source: variables.css === */
:root {
    --color-primary: #1F4E8C;
    --color-primary-dark: #14335c;
    --color-primary-light: #2c70c9;
    --color-primary-glow: rgba(31, 78, 140, 0.12);
    
    --color-secondary: #2E7D32;
    --color-secondary-dark: #1e5221;
    --color-secondary-light: #42b348;
    
    --color-accent: #5D4037;
    --color-accent-dark: #372520;
    --color-accent-light: #8a5e51;
    
    --color-bg: #FFFFFF;
    --color-bg-secondary: #F8FAFC;
    --color-bg-tertiary: #F1F5F9;
    --color-bg-card: #FFFFFF;
    --color-bg-hover: #E8EEF4;
    
    --color-text: #1E293B;
    --color-text-secondary: #475569;
    --color-text-muted: #94A3B8;
    
    --color-link: var(--color-primary);
    --color-link-hover: var(--color-primary-dark);
    
    --color-border: #E2E8F0;
    --color-border-light: #F1F5F9;
    --color-border-hover: #CBD5E1;
    
    --color-success: #22C55E;
    --color-warning: #F59E0B;
    --color-error: #EF4444;
    --color-info: #3B82F6;
    
    --gradient-primary: linear-gradient(135deg, #1F4E8C 0%, #14335c 100%);
    --gradient-secondary: linear-gradient(135deg, #2E7D32 0%, #1e5221 100%);
    --gradient-hero: linear-gradient(135deg, rgba(31, 78, 140, 0.06) 0%, rgba(46, 125, 50, 0.06) 100%);
    
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 10px;
    --radius-xl: 10px;
    --radius-full: 9999px;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 12px 30px rgba(0, 0, 0, 0.12);
    
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
    
    --z-dropdown: 100;
    --z-modal: 1000;
    --z-toast: 2000;
}

[data-theme="dark"] {
    --color-bg: #0F172A;
    --color-bg-secondary: #1E293B;
    --color-bg-tertiary: #334155;
    --color-bg-card: #1E293B;
    --color-bg-hover: #334155;
    
    --color-text: #E2E8F0;
    --color-text-secondary: #CBD5E1;
    --color-text-muted: #94A3B8;
    
    --color-link: var(--color-primary-light);
    --color-link-hover: var(--color-primary);
    
    --color-border: #334155;
    --color-border-light: #475569;
    --color-border-hover: #64748B;
    
    --color-success: #4ADE80;
    --color-warning: #FBBF24;
    --color-error: #F87171;
    --color-info: #60A5FA;
    
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.5);
    --shadow-xl: 0 12px 30px rgba(0, 0, 0, 0.55);
}

@media (prefers-color-scheme: dark) {
    :root:not([data-theme="light"]) {
        --color-bg: #0F172A;
        --color-bg-secondary: #1E293B;
        --color-bg-tertiary: #334155;
        --color-bg-card: #1E293B;
        --color-bg-hover: #334155;
        
        --color-text: #E2E8F0;
        --color-text-secondary: #CBD5E1;
        --color-text-muted: #94A3B8;
        
        --color-link: var(--color-primary-light);
        --color-link-hover: var(--color-primary);
        
        --color-border: #334155;
        --color-border-light: #475569;
        --color-border-hover: #64748B;
        
        --color-success: #4ADE80;
        --color-warning: #FBBF24;
        --color-error: #F87171;
        --color-info: #60A5FA;
        
        --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
        --shadow-md: 0 4px 10px rgba(0, 0, 0, 0.4);
        --shadow-lg: 0 8px 20px rgba(0, 0, 0, 0.5);
        --shadow-xl: 0 12px 30px rgba(0, 0, 0, 0.55);
    }
}

/* === source: reset.css === */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
}

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

img {
    max-width: 100%;
    height: auto;
}

input,
button,
textarea,
select {
    font-family: inherit;
    font-size: inherit;
}

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

ul,
ol {
    list-style: none;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: var(--radius-sm);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-muted);
}

/* === source: typography.css === */
.text-xs { font-size: 0.75rem; }
.text-sm { font-size: 0.875rem; }
.text-base { font-size: 1rem; }
.text-lg { font-size: 1.125rem; }
.text-xl { font-size: 1.25rem; }
.text-2xl { font-size: 1.5rem; }
.text-3xl { font-size: 1.875rem; }
.text-4xl { font-size: 2.25rem; }

.font-normal { font-weight: 400; }
.font-medium { font-weight: 500; }
.font-semibold { font-weight: 600; }
.font-bold { font-weight: 700; }

.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.text-primary { color: var(--color-primary); }
.text-secondary { color: var(--color-text-secondary); }
.text-muted { color: var(--color-text-muted); }
.text-success { color: var(--color-success); }
.text-warning { color: var(--color-warning); }
.text-error { color: var(--color-error); }

.line-clamp-1 { overflow: hidden; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; }
.line-clamp-2 { overflow: hidden; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.line-clamp-3 { overflow: hidden; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; }

.uppercase { text-transform: uppercase; }
.lowercase { text-transform: lowercase; }
.capitalize { text-transform: capitalize; }

.letter-spacing-tight { letter-spacing: -0.02em; }
.letter-spacing-normal { letter-spacing: 0; }
.letter-spacing-wide { letter-spacing: 0.02em; }

/* === source: layout.css === */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.container-xs {
    max-width: 480px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

.row {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.col {
    flex: 1;
    min-width: 0;
}

.col-1 { flex: 0 0 calc(100% / 12); }
.col-2 { flex: 0 0 calc(100% / 6); }
.col-3 { flex: 0 0 calc(100% / 4); }
.col-4 { flex: 0 0 calc(100% / 3); }
.col-5 { flex: 0 0 calc(100% * 5 / 12); }
.col-6 { flex: 0 0 50%; }
.col-7 { flex: 0 0 calc(100% * 7 / 12); }
.col-8 { flex: 0 0 calc(100% * 8 / 12); }
.col-9 { flex: 0 0 calc(100% * 9 / 12); }
.col-10 { flex: 0 0 calc(100% * 10 / 12); }
.col-11 { flex: 0 0 calc(100% * 11 / 12); }
.col-12 { flex: 0 0 100%; }

@media (max-width: 768px) {
    .col-1, .col-2, .col-3, .col-4, .col-5, .col-6,
    .col-7, .col-8, .col-9, .col-10, .col-11 {
        flex: 0 0 100%;
    }
}

.d-flex { display: flex; }
.d-block { display: block; }
.d-inline { display: inline; }
.d-inline-block { display: inline-block; }
.d-none { display: none; }

.flex-column { flex-direction: column; }
.flex-row { flex-direction: row; }
.flex-wrap { flex-wrap: wrap; }
.flex-nowrap { flex-wrap: nowrap; }

.justify-start { justify-content: flex-start; }
.justify-end { justify-content: flex-end; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.justify-around { justify-content: space-around; }

.items-start { align-items: flex-start; }
.items-end { align-items: flex-end; }
.items-center { align-items: center; }
.items-baseline { align-items: baseline; }

.flex-grow { flex-grow: 1; }
.flex-shrink { flex-shrink: 1; }

.gap-xs { gap: var(--spacing-xs); }
.gap-sm { gap: var(--spacing-sm); }
.gap-md { gap: var(--spacing-md); }
.gap-lg { gap: var(--spacing-lg); }
.gap-xl { gap: var(--spacing-xl); }

.p-xs { padding: var(--spacing-xs); }
.p-sm { padding: var(--spacing-sm); }
.p-md { padding: var(--spacing-md); }
.p-lg { padding: var(--spacing-lg); }
.p-xl { padding: var(--spacing-xl); }

.px-xs { padding-left: var(--spacing-xs); padding-right: var(--spacing-xs); }
.px-sm { padding-left: var(--spacing-sm); padding-right: var(--spacing-sm); }
.px-md { padding-left: var(--spacing-md); padding-right: var(--spacing-md); }
.px-lg { padding-left: var(--spacing-lg); padding-right: var(--spacing-lg); }

.py-xs { padding-top: var(--spacing-xs); padding-bottom: var(--spacing-xs); }
.py-sm { padding-top: var(--spacing-sm); padding-bottom: var(--spacing-sm); }
.py-md { padding-top: var(--spacing-md); padding-bottom: var(--spacing-md); }
.py-lg { padding-top: var(--spacing-lg); padding-bottom: var(--spacing-lg); }

.m-xs { margin: var(--spacing-xs); }
.m-sm { margin: var(--spacing-sm); }
.m-md { margin: var(--spacing-md); }
.m-lg { margin: var(--spacing-lg); }
.m-xl { margin: var(--spacing-xl); }

.mx-auto { margin-left: auto; margin-right: auto; }
.my-auto { margin-top: auto; margin-bottom: auto; }

.mt-xs { margin-top: var(--spacing-xs); }
.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }

.mb-xs { margin-bottom: var(--spacing-xs); }
.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }

.ml-xs { margin-left: var(--spacing-xs); }
.ml-sm { margin-left: var(--spacing-sm); }
.ml-md { margin-left: var(--spacing-md); }
.ml-lg { margin-left: var(--spacing-lg); }

.mr-xs { margin-right: var(--spacing-xs); }
.mr-sm { margin-right: var(--spacing-sm); }
.mr-md { margin-right: var(--spacing-md); }
.mr-lg { margin-right: var(--spacing-lg); }

.overflow-hidden { overflow: hidden; }
.overflow-auto { overflow: auto; }

.position-static { position: static; }
.position-relative { position: relative; }
.position-absolute { position: absolute; }
.position-fixed { position: fixed; }
.position-sticky { position: sticky; }

.top-0 { top: 0; }
.bottom-0 { bottom: 0; }
.left-0 { left: 0; }
.right-0 { right: 0; }

.z-100 { z-index: var(--z-dropdown); }
.z-1000 { z-index: var(--z-modal); }
.z-2000 { z-index: var(--z-toast); }

@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }
}

/* === source: components.css === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 12px 24px;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
    outline: none;
    white-space: nowrap;
    letter-spacing: 0.01em;
    font-family: inherit;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #FFFFFF;
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background-color: var(--color-bg-tertiary);
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

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

.btn-outline {
    background-color: transparent;
    color: var(--color-primary);
    border: 1px solid var(--color-primary);
}

.btn-outline:hover {
    background-color: var(--color-primary-glow);
}

.btn-text {
    background-color: transparent;
    color: var(--color-text-secondary);
    padding: 8px 12px;
}

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

.btn-sm {
    padding: 8px 16px;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 1rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.card-header {
    padding-bottom: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--color-border-light);
}

.card-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
}

.card-body {
    color: var(--color-text-secondary);
}

.card-footer {
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
    border-top: 1px solid var(--color-border-light);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.input {
    width: 100%;
    padding: 12px 16px;
    font-size: 0.9375rem;
    background: var(--color-bg);
    color: var(--color-text);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    outline: none;
    font-family: inherit;
}

.input:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

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

.input-group {
    display: flex;
    align-items: center;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--color-bg);
}

.input-group .input {
    border: none;
    border-radius: 0;
    background: transparent;
}

.input-group-prepend,
.input-group-append {
    display: flex;
    align-items: center;
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: var(--color-bg-secondary);
    color: var(--color-text-muted);
}

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 12px;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.badge-primary {
    background-color: var(--color-primary-glow);
    color: var(--color-primary);
}

.badge-success {
    background-color: rgba(34, 197, 94, 0.1);
    color: var(--color-success);
}

.badge-warning {
    background-color: rgba(245, 158, 11, 0.1);
    color: var(--color-warning);
}

.badge-error {
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--color-error);
}

.badge-secondary {
    background-color: var(--color-bg-secondary);
    color: var(--color-text-secondary);
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-modal);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
}

.modal-overlay.show {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: var(--spacing-xl);
    width: 90%;
    max-width: 400px;
    max-height: 80vh;
    overflow-y: auto;
    transform: scale(0.95) translateY(20px);
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-xl);
}

.modal-overlay.show .modal {
    transform: scale(1) translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-text);
}

.modal-close {
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    color: var(--color-text-muted);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
    background: transparent;
    border: none;
}

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

.modal-body {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-secondary);
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.toast {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-toast);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg);
    border-radius: var(--radius-md);
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateX(120%);
    transition: transform var(--transition-normal);
}

.toast.show {
    transform: translateX(0);
}

.toast-success {
    border-left: 3px solid var(--color-success);
}

.toast-warning {
    border-left: 3px solid var(--color-warning);
}

.toast-error {
    border-left: 3px solid var(--color-error);
}

.toast-info {
    border-left: 3px solid var(--color-info);
}

.toast-message {
    font-size: 0.875rem;
    color: var(--color-text);
}

.color-block {
    position: relative;
    width: 100%;
    aspect-ratio: 1;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    overflow: hidden;
}

.color-block:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-md);
}

.color-block .color-value {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.7);
    color: #FFFFFF;
    font-size: 0.75rem;
    font-weight: 500;
    text-align: center;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.color-block:hover .color-value {
    opacity: 1;
}

.color-block .save-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.5);
    border-radius: 50%;
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.color-block:hover .save-btn {
    opacity: 1;
}

.color-block .save-btn svg {
    width: 14px;
    height: 14px;
    fill: #FFFFFF;
}

.scheme-card {
    background: var(--color-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

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

.scheme-card-header {
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.scheme-card-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-text);
}

.scheme-card-tags {
    display: flex;
    gap: 4px;
}

.scheme-card-tags .badge {
    font-size: 0.625rem;
}

.scheme-card-colors {
    display: flex;
    height: 80px;
}

.scheme-card-colors .color-strip {
    flex: 1;
    transition: opacity var(--transition-fast);
}

.scheme-card-footer {
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
}

.loading {
    display: inline-block;
    width: 24px;
    height: 24px;
    border: 2px solid var(--color-border);
    border-radius: 50%;
    border-top-color: var(--color-primary);
    animation: spin 0.6s linear infinite;
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.animate-fade-in {
    animation: fadeIn 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== 登录模态框 ===== */
.login-modal-body {
    text-align: center;
}

.login-qr-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-md);
}

.login-qr-box {
    width: 200px;
    height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #FFFFFF;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.login-qr-placeholder {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.login-guide {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
    text-align: center;
    padding: 0 var(--spacing-sm);
}

.login-guide b {
    color: var(--color-primary);
    font-weight: 600;
}

.login-code-box {
    text-align: left;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md);
}

.login-code-row {
    display: flex;
    gap: var(--spacing-sm);
}

.login-code-input {
    flex: 1;
    height: 40px;
    padding: 0 var(--spacing-md);
    font-size: 0.95rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-text);
    background: #FFFFFF;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    outline: none;
    transition: border-color var(--transition-fast);
}

.login-code-input:focus {
    border-color: var(--color-primary);
}

.login-code-btn {
    height: 40px;
    padding: 0 var(--spacing-lg);
    font-size: 0.95rem;
    font-weight: 600;
    white-space: nowrap;
    flex-shrink: 0;
    color: #FFFFFF;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background var(--transition-fast), opacity var(--transition-fast);
}

.login-code-btn:hover {
    background: var(--color-primary-dark);
}

.login-code-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.login-code-error {
    min-height: 1.2em;
    margin-top: var(--spacing-sm);
    font-size: 0.8rem;
    color: var(--color-error);
}

/* ===== 账户区布局（左侧栏） ===== */
.account-page {
    padding: 40px 0;
}

.account-layout {
    display: flex;
    gap: 32px;
    align-items: flex-start;
}

.account-sidebar {
    width: 240px;
    flex-shrink: 0;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 12px;
    position: sticky;
    top: 80px;
}

/* 侧栏用户信息 */
.account-user {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 8px 4px 16px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 12px;
}

.account-user-avatar {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    object-fit: cover;
    border: 2px solid var(--color-border);
    background-color: var(--color-bg-secondary);
    margin-bottom: 10px;
}

.account-user-name {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    word-break: break-all;
}

.account-user-openid {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    font-family: monospace;
    margin-top: 4px;
}

/* 侧栏统计数据 */
.account-stats {
    display: flex;
    justify-content: space-between;
    gap: 4px;
    padding: 0 4px 16px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 12px;
}

.account-stats .stat-item {
    flex: 1;
    min-width: 0;
}

.stat-item {
    text-align: center;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--color-text-muted);
    margin-top: 4px;
}

.account-nav {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.account-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 14px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    text-decoration: none;
    transition: background var(--transition-fast), color var(--transition-fast);
}

.account-nav-item svg {
    width: 20px;
    height: 20px;
    flex-shrink: 0;
}

.account-nav-item:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.account-nav-item.active {
    background: var(--color-primary);
    color: #FFFFFF;
}

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

@media (max-width: 768px) {
    .account-page {
        padding: 24px 0;
    }

    .account-layout {
        flex-direction: column;
        gap: 16px;
    }

    .account-sidebar {
        width: 100%;
        position: static;
    }

    .account-user-avatar {
        width: 56px;
        height: 56px;
    }

    .account-stats .stat-value {
        font-size: 1.25rem;
    }

    .account-nav {
        flex-direction: row;
        overflow-x: auto;
    }

    .account-nav-item {
        white-space: nowrap;
    }
}

/* === source: admin.css (管理专用) === */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 240px;
    background-color: var(--color-bg-card);
    border-right: 1px solid var(--color-border);
    padding: 20px 0;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    left: 0;
    top: 0;
}

.sidebar-logo {
    padding: 0 20px;
    margin-bottom: 24px;
}

.sidebar-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-primary);
}

.sidebar-menu {
    padding: 0 12px;
}

.menu-item {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    margin-bottom: 4px;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.menu-item:hover {
    background-color: var(--color-bg-hover);
    color: var(--color-text);
}

.menu-item.active {
    background-color: rgba(31, 78, 140, 0.15);
    color: var(--color-primary);
}

.menu-icon {
    width: 20px;
    margin-right: 12px;
}

.menu-text {
    font-size: 0.875rem;
}

.main-content {
    flex: 1;
    margin-left: 240px;
    padding: 24px;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

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

.page-actions {
    display: flex;
    gap: 8px;
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 32px;
}

.stat-card {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    padding: 20px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 8px;
}

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

.data-table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    background-color: var(--color-bg-hover);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.data-table td {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.data-table tr:hover {
    background-color: var(--color-bg-hover);
}

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

.btn-sm {
    padding: 4px 12px;
    font-size: 0.75rem;
}

.btn-danger {
    background-color: rgba(239, 68, 68, 0.15);
    color: var(--color-error);
    border: 1px solid rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background-color: rgba(239, 68, 68, 0.25);
}

/* 注意：本文件里存在两套 .modal-overlay 定义。
 * 上面一套（601 行附近）用 opacity/visibility 控制显隐，
 * 这一套用 display:none —— 后者会覆盖前者，导致
 * 只加 .show 类也弹不出来（引擎管理页的三个弹窗踩过这个坑，
 * 表现为 .show 已加但 offsetHeight 为 0）。
 * 所以这里必须配套提供 .show 的display 规则。 */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(0, 0, 0, 0.5);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.modal-overlay.show {
    display: flex;
}

.modal {
    background-color: var(--color-bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-border);
}

.modal-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.25rem;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
}

.modal-body {
    padding: 20px;
}

.modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding: 16px 20px;
    border-top: 1px solid var(--color-border);
}

.badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 0.7rem;
    border-radius: var(--radius-sm);
}

.badge-success {
    background-color: rgba(34, 197, 94, 0.15);
    color: #22C55E;
}

.badge-error {
    background-color: rgba(239, 68, 68, 0.15);
    color: #EF4444;
}

@media (max-width: 768px) {
    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
    }
    
    .main-content {
        margin-left: 0;
        padding: 16px;
    }
    
    .dashboard-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .data-table {
        display: block;
        overflow-x: auto;
    }
}