/* ============================================
   AnyPlay Panel - 主样式表
   风格: 现代 SaaS + 工业风混合
   ============================================ */

/* CSS 变量 */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --primary-dark: #1e40af;
    --success: #22c55e;
    --success-light: #dcfce7;
    --warning: #f59e0b;
    --warning-light: #fef3c7;
    --danger: #ef4444;
    --danger-light: #fee2e2;
    --info: #06b6d4;
    --info-light: #cffafe;

    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-dark: #0f172a;

    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-tertiary: #94a3b8;
    --text-inverse: #ffffff;

    --border: #e2e8f0;
    --border-light: #f1f5f9;
    --border-dark: #cbd5e1;

    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.05);
    --shadow: 0 1px 3px 0 rgba(0,0,0,0.1), 0 1px 2px -1px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -2px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -4px rgba(0,0,0,0.1);

    --radius-sm: 4px;
    --radius: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    --sidebar-width: 250px;
    --header-height: 56px;

    --font-mono: 'Consolas', 'Monaco', 'Courier New', monospace;
}

/* 暗色模式 */
[data-theme="dark"] {
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-light: #1e3a5f;
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-tertiary: #64748b;
    --border: #334155;
    --border-light: #1e293b;
    --border-dark: #475569;
    --shadow-sm: 0 1px 2px 0 rgba(0,0,0,0.3);
    --shadow: 0 1px 3px 0 rgba(0,0,0,0.4);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.4);
}

/* 基础重置 */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
    background: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.15s;
}
a:hover { color: var(--primary-hover); }

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

/* 滚动条 */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--text-tertiary); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ============================================
   布局
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.container-sm {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 管理后台布局 */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.admin-sidebar {
    width: var(--sidebar-width);
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    z-index: 100;
}

.admin-main {
    flex: 1;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
}

.admin-header {
    height: var(--header-height);
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.admin-content {
    padding: 24px;
}

/* 用户面板布局 */
.user-layout {
    display: flex;
    min-height: 100vh;
}

.user-sidebar {
    width: 280px;
    background: var(--bg-primary);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
}

.user-main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

/* ============================================
   组件：侧边栏
   ============================================ */
.sidebar-header {
    padding: 20px;
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-logo {
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    background: var(--primary);
    color: var(--text-inverse);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 18px;
}

.sidebar-title {
    font-weight: 700;
    font-size: 16px;
    color: var(--text-primary);
}

.sidebar-nav {
    padding: 12px;
    flex: 1;
}

.sidebar-section {
    margin-bottom: 8px;
}

.sidebar-section-title {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-tertiary);
    padding: 8px 12px 4px;
    font-weight: 600;
}

.sidebar-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius);
    color: var(--text-secondary);
    transition: all 0.15s;
    font-size: 13px;
}

.sidebar-item:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.sidebar-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

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

/* ============================================
   组件：卡片
   ============================================ */
.card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

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

.card-header h3, .card-title {
    font-size: 15px;
    font-weight: 600;
}

.card-body {
    padding: 20px;
}

.card-footer {
    padding: 12px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
}

/* ============================================
   组件：按钮
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 8px 16px;
    font-size: 13px;
    font-weight: 500;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all 0.15s;
    line-height: 1.4;
    white-space: nowrap;
    text-decoration: none;
}

.btn:hover { opacity: 0.9; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

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

.btn-success {
    background: var(--success);
    color: var(--text-inverse);
}

.btn-danger {
    background: var(--danger);
    color: var(--text-inverse);
}

.btn-warning {
    background: var(--warning);
    color: #000;
}

.btn-info {
    background: var(--info);
    color: var(--text-inverse);
}

.btn-outline {
    background: transparent;
    border-color: var(--border);
    color: var(--text-primary);
}
.btn-outline:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-dark);
}

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

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }
.btn-xl { padding: 14px 32px; font-size: 16px; }
.btn-block { display: flex; width: 100%; }

/* ============================================
   组件：表单
   ============================================ */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 13px;
    font-weight: 500;
    margin-bottom: 6px;
    color: var(--text-primary);
}

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

.form-control {
    display: block;
    width: 100%;
    padding: 9px 12px;
    font-size: 13px;
    line-height: 1.5;
    color: var(--text-primary);
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.15s, box-shadow 0.15s;
    font-family: inherit;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-control:disabled {
    background: var(--bg-tertiary);
    cursor: not-allowed;
}

select.form-control {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 36px;
}

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

.form-check {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 8px;
}

.form-check-input {
    width: 16px;
    height: 16px;
    accent-color: var(--primary);
    cursor: pointer;
}

.form-check-label {
    font-size: 13px;
    cursor: pointer;
}

.form-hint {
    font-size: 12px;
    color: var(--text-tertiary);
    margin-top: 4px;
}

.form-error {
    font-size: 12px;
    color: var(--danger);
    margin-top: 4px;
}

/* ============================================
   组件：表格
   ============================================ */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

table th {
    padding: 10px 16px;
    text-align: left;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border);
    white-space: nowrap;
}

table td {
    padding: 12px 16px;
    font-size: 13px;
    border-bottom: 1px solid var(--border-light);
    color: var(--text-primary);
}

table tbody tr:hover {
    background: var(--bg-secondary);
}

/* ============================================
   组件：徽章
   ============================================ */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 3px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 100px;
    line-height: 1.4;
}

.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-success { background: var(--success-light); color: #166534; }
.badge-warning { background: var(--warning-light); color: #92400e; }
.badge-danger { background: var(--danger-light); color: #991b1b; }
.badge-info { background: var(--info-light); color: #0e7490; }
.badge-gray { background: var(--bg-tertiary); color: var(--text-secondary); }

/* ============================================
   组件：提示 / Toast
   ============================================ */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    font-size: 13px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert-success {
    background: var(--success-light);
    color: #166534;
    border: 1px solid #86efac;
}

.alert-error, .alert-danger {
    background: var(--danger-light);
    color: #991b1b;
    border: 1px solid #fca5a5;
}

.alert-warning {
    background: var(--warning-light);
    color: #92400e;
    border: 1px solid #fcd34d;
}

.alert-info {
    background: var(--info-light);
    color: #0e7490;
    border: 1px solid #67e8f9;
}

/* ============================================
   组件：统计卡片
   ============================================ */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

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

.stat-card .stat-icon {
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    font-size: 18px;
}

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 4px;
}

.stat-card .stat-label {
    font-size: 13px;
    color: var(--text-secondary);
}

/* ============================================
   页面：安装向导
   ============================================ */
.install-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 100%);
    padding: 40px 20px;
}

.install-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 640px;
    overflow: hidden;
}

.install-header {
    padding: 32px 40px;
    text-align: center;
    border-bottom: 1px solid var(--border);
}

.install-header .logo {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.install-header h2 {
    font-size: 18px;
    color: var(--text-secondary);
    font-weight: 400;
}

.install-steps {
    display: flex;
    border-bottom: 1px solid var(--border);
}

.install-step {
    flex: 1;
    text-align: center;
    padding: 12px 8px;
    font-size: 12px;
    color: var(--text-tertiary);
    position: relative;
    cursor: default;
}

.install-step.active {
    color: var(--primary);
    font-weight: 600;
}

.install-step.completed {
    color: var(--success);
}

.install-step::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: transparent;
    transition: background 0.3s;
}

.install-step.active::after {
    background: var(--primary);
}

.install-step.completed::after {
    background: var(--success);
}

.install-body {
    padding: 40px;
}

/* 环境检测 */
.env-check-list {
    display: flex;
    flex-direction: column;
    gap: 1px;
    background: var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    margin-bottom: 20px;
}

.env-check-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: var(--bg-primary);
    font-size: 13px;
}

.env-check-item .status-icon {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

.env-check-item .status-pass {
    background: var(--success-light);
    color: var(--success);
}

.env-check-item .status-warn {
    background: var(--warning-light);
    color: var(--warning);
}

.env-check-item .status-fail {
    background: var(--danger-light);
    color: var(--danger);
}

/* ============================================
   页面：首页模板
   ============================================ */
.home-nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 40px;
    background: rgba(255,255,255,0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.home-nav .nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 18px;
}

.home-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.home-nav .nav-links a {
    font-size: 14px;
    color: var(--text-secondary);
    transition: color 0.15s;
}

.home-nav .nav-links a:hover {
    color: var(--primary);
}

.hero-section {
    padding: 80px 40px;
    text-align: center;
}

.hero-section h1 {
    font-size: clamp(32px, 5vw, 56px);
    font-weight: 800;
    line-height: 1.15;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary), #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-section .hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 32px;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
}

/* 套餐卡片网格 */
.plans-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
    padding: 0 40px 60px;
}

.plan-card {
    background: var(--bg-primary);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: all 0.3s;
    box-shadow: var(--shadow-sm);
}

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

.plan-card.featured {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary), var(--shadow-md);
    position: relative;
}

.plan-card.featured::before {
    content: '推荐';
    position: absolute;
    top: 12px;
    right: -28px;
    background: var(--primary);
    color: white;
    font-size: 11px;
    padding: 4px 32px;
    transform: rotate(45deg);
    font-weight: 600;
}

.plan-header {
    padding: 32px 24px 16px;
    text-align: center;
}

.plan-name {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 8px;
}

.plan-price {
    font-size: 36px;
    font-weight: 800;
    color: var(--primary);
}

.plan-price small {
    font-size: 14px;
    font-weight: 400;
    color: var(--text-tertiary);
}

.plan-body {
    padding: 0 24px 24px;
}

.plan-features {
    list-style: none;
    margin-bottom: 20px;
}

.plan-features li {
    padding: 8px 0;
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid var(--border-light);
}

.plan-features li::before {
    content: '✓';
    color: var(--success);
    font-weight: 700;
}

.plan-footer {
    padding: 0 24px 24px;
}

/* ============================================
   页面：登录/注册
   ============================================ */
.auth-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    padding: 40px 20px;
}

.auth-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    overflow: hidden;
}

.auth-header {
    padding: 40px 40px 0;
    text-align: center;
}

.auth-header .logo {
    font-size: 28px;
    font-weight: 800;
    color: var(--primary);
    margin-bottom: 8px;
}

.auth-header h2 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 4px;
}

.auth-header p {
    font-size: 14px;
    color: var(--text-secondary);
}

.auth-body {
    padding: 32px 40px;
}

.auth-footer {
    padding: 16px 40px;
    text-align: center;
    border-top: 1px solid var(--border);
    font-size: 13px;
    color: var(--text-secondary);
}

/* ============================================
   控制台终端
   ============================================ */
.console-container {
    background: #0a0a0a;
    border-radius: var(--radius);
    overflow: hidden;
    font-family: var(--font-mono);
    height: 500px;
    display: flex;
    flex-direction: column;
}

.console-header {
    padding: 8px 16px;
    background: #1a1a1a;
    display: flex;
    align-items: center;
    gap: 8px;
}

.console-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
}

.console-dot.red { background: #ff5f56; }
.console-dot.yellow { background: #ffbd2e; }
.console-dot.green { background: #27c93f; }

.console-output {
    flex: 1;
    overflow-y: auto;
    padding: 12px 16px;
    font-size: 13px;
    line-height: 1.6;
    color: #e0e0e0;
}

.console-input {
    display: flex;
    border-top: 1px solid #1a1a1a;
}

.console-input .prompt {
    padding: 10px 16px;
    color: #27c93f;
    font-family: var(--font-mono);
    font-size: 13px;
}

.console-input input {
    flex: 1;
    background: transparent;
    border: none;
    color: #e0e0e0;
    font-family: var(--font-mono);
    font-size: 13px;
    outline: none;
    padding: 10px 0;
}

/* ============================================
   文件管理器
   ============================================ */
.file-manager {
    display: flex;
    flex-direction: column;
    height: 600px;
}

.file-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    background: var(--bg-secondary);
    flex-wrap: wrap;
}

.file-breadcrumb {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    flex: 1;
}

.file-breadcrumb a {
    color: var(--text-secondary);
}

.file-breadcrumb span {
    color: var(--text-tertiary);
}

.file-list {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 8px 12px;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 13px;
    transition: background 0.1s;
}

.file-item:hover {
    background: var(--bg-tertiary);
}

.file-item .file-name {
    display: flex;
    align-items: center;
    gap: 8px;
}

.file-item .file-info {
    color: var(--text-tertiary);
    font-size: 12px;
}

/* ============================================
   加载动画
   ============================================ */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

.spinner-lg {
    width: 36px;
    height: 36px;
    border-width: 3px;
}

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

/* ============================================
   工具类
   ============================================ */
.text-center { text-align: center; }
.text-right { text-align: right; }
.text-left { text-align: left; }

.text-sm { font-size: 12px; }
.text-xs { font-size: 11px; }
.text-lg { font-size: 15px; }
.text-xl { font-size: 18px; }

.text-primary { color: var(--primary); }
.text-success { color: var(--success); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-muted { color: var(--text-tertiary); }

.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.font-mono { font-family: var(--font-mono); }

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-3 { margin-top: 12px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-0 { margin-bottom: 0; }
.mb-2 { margin-bottom: 8px; }
.mb-3 { margin-bottom: 12px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.mx-auto { margin-left: auto; margin-right: auto; }

.p-0 { padding: 0; }
.p-3 { padding: 12px; }
.p-4 { padding: 16px; }
.p-6 { padding: 24px; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: 4px; }
.gap-2 { gap: 8px; }
.gap-3 { gap: 12px; }
.gap-4 { gap: 16px; }

.w-full { width: 100%; }
.h-full { height: 100%; }

.rounded { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }

.shadow { box-shadow: var(--shadow); }
.shadow-md { box-shadow: var(--shadow-md); }

.hidden { display: none; }
.block { display: block; }
.inline-block { display: inline-block; }

.overflow-hidden { overflow: hidden; }

.grid { display: grid; }
.grid-cols-2 { grid-template-columns: repeat(2, 1fr); }
.grid-cols-3 { grid-template-columns: repeat(3, 1fr); }
.grid-cols-4 { grid-template-columns: repeat(4, 1fr); }

/* 响应式 */
@media (max-width: 768px) {
    .admin-sidebar { display: none; }
    .admin-main { margin-left: 0; }
    .user-sidebar { width: 100%; height: auto; }
    .user-layout { flex-direction: column; }
    .grid-cols-2, .grid-cols-3, .grid-cols-4 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .home-nav { padding: 12px 20px; }
    .hero-section { padding: 60px 20px; }
    .plans-grid { padding: 0 20px 40px; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .hero-actions { flex-direction: column; align-items: center; }
}