/**
 * Waywave 渡澜 - 组件样式库
 * 包含：按钮、表单、卡片、导航、弹窗、Toast 等通用组件
 */

/* ========================================
   1. 按钮组件
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: 10px 20px;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    line-height: 1;
    border-radius: var(--radius-md);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    user-select: none;
}

.btn:hover:not(:disabled) {
    transform: translateY(-1px);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

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

/* 主要按钮 - 使用品牌绿 */
.btn-primary {
    background: var(--brand-primary);
    color: #111827;
    border-color: var(--brand-primary);
}

.btn-primary:hover:not(:disabled) {
    background: #bef264;
    border-color: #bef264;
    box-shadow: 0 4px 12px rgba(163, 230, 53, 0.3);
}

/* 次要按钮 */
.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--color-bg-hover);
    border-color: var(--color-text-muted);
}

/* 幽灵按钮 */
.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}

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

/* 强调按钮 - 渐变效果 */
.btn-accent {
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    color: white;
    border: none;
}

.btn-accent:hover:not(:disabled) {
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

/* 危险按钮 */
.btn-danger {
    background: var(--color-error);
    color: white;
    border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
    background: #ef4444;
    box-shadow: 0 4px 12px rgba(248, 113, 113, 0.3);
}

/* 尺寸变体 */
.btn-sm {
    padding: 6px 12px;
    font-size: var(--font-size-xs);
}

.btn-lg {
    padding: 14px 28px;
    font-size: var(--font-size-base);
}

/* 满宽按钮 */
.btn-block {
    width: 100%;
}

/* 按钮图标 */
.btn-icon {
    width: 36px;
    height: 36px;
    padding: 0;
    border-radius: var(--radius-md);
}

.btn-icon.btn-sm {
    width: 28px;
    height: 28px;
}

/* 按钮加载状态 */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

/* ========================================
   2. 表单组件
   ======================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

.form-label.required::after {
    content: '*';
    color: var(--color-error);
    margin-left: 4px;
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: 12px 16px;
    font-size: var(--font-size-sm);
    color: var(--color-text-primary);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:hover,
.form-select:hover,
.form-textarea:hover {
    border-color: var(--color-text-muted);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(163, 230, 53, 0.15);
}

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

.form-input:disabled,
.form-select:disabled,
.form-textarea:disabled {
    background: var(--color-bg-hover);
    cursor: not-allowed;
    opacity: 0.7;
}

/* 输入框错误状态 */
.form-input.error,
.form-select.error,
.form-textarea.error {
    border-color: var(--color-error);
}

.form-input.error:focus,
.form-select.error:focus,
.form-textarea.error:focus {
    box-shadow: 0 0 0 3px rgba(248, 113, 113, 0.15);
}

/* 输入框成功状态 */
.form-input.success {
    border-color: var(--color-success);
}

/* 表单提示文本 */
.form-hint {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.form-error {
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-error);
}

/* Select 下拉框 */
.form-select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%239ca3af'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='M19 9l-7 7-7-7'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 16px;
    padding-right: 40px;
    cursor: pointer;
}

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

/* 密码可见切换 */
.input-password-wrapper {
    position: relative;
}

.input-password-wrapper .form-input {
    padding-right: 44px;
}

.input-password-toggle {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--color-text-muted);
    cursor: pointer;
    padding: 4px;
}

.input-password-toggle:hover {
    color: var(--color-text-secondary);
}

/* Checkbox & Radio */
.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
}

.form-check-input {
    width: 18px;
    height: 18px;
    accent-color: var(--brand-primary);
    cursor: pointer;
}

.form-check-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
}

/* ========================================
   3. 卡片组件
   ======================================== */
.card {
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

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

.card-title {
    font-size: var(--font-size-base);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-primary);
}

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

.card-footer {
    padding: var(--spacing-md) var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    background: var(--color-bg-hover);
}

/* 卡片悬浮效果 */
.card-hover {
    transition: all var(--transition-normal);
}

.card-hover:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--brand-primary);
}

/* ========================================
   4. 导航栏
   ======================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: var(--color-bg-elevated);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 var(--spacing-lg);
    z-index: var(--z-fixed);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.navbar-logo {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    letter-spacing: -0.5px;
}

.navbar-logo-sub {
    font-size: var(--font-size-sm);
    color: var(--brand-primary);
    font-weight: var(--font-weight-medium);
}

.navbar-nav {
    display: flex;
    gap: var(--spacing-lg);
}

.navbar-link {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    padding: var(--spacing-sm) 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.navbar-link:hover,
.navbar-link.active {
    color: var(--color-text-primary);
    border-bottom-color: var(--brand-primary);
    text-decoration: none;
}

.navbar-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

/* 用户头像下拉 */
.user-dropdown {
    position: relative;
}

.user-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    cursor: pointer;
    transition: background var(--transition-fast);
}

.user-dropdown-trigger:hover {
    background: var(--color-bg-hover);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
}

.user-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: var(--spacing-sm);
    min-width: 160px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all var(--transition-fast);
    z-index: var(--z-dropdown);
}

.user-dropdown.open .user-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-dropdown-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: 10px 16px;
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.user-dropdown-item:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
    text-decoration: none;
}

.user-dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: var(--spacing-xs) 0;
}

/* ========================================
   5. 模态框
   ======================================== */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    z-index: var(--z-modal-backdrop);
}

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

.modal {
    width: 100%;
    max-width: 480px;
    background: var(--color-bg-elevated);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    transform: scale(0.95) translateY(10px);
    transition: transform var(--transition-normal);
}

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

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

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

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

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

.modal-body {
    padding: var(--spacing-lg);
    max-height: 60vh;
    overflow-y: auto;
}

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

/* ========================================
   6. Toast 通知
   ======================================== */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: var(--z-toast);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    pointer-events: none;
}

.toast {
    min-width: 280px;
    max-width: 400px;
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    animation: fadeInDown var(--transition-normal) ease-out;
    pointer-events: auto;
}

.toast-icon {
    font-size: var(--font-size-lg);
    flex-shrink: 0;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
}

.toast-message {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.toast-close {
    color: var(--color-text-muted);
    padding: 4px;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.toast-close:hover {
    background: var(--color-bg-hover);
    color: var(--color-text-primary);
}

/* Toast 变体 */
.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-success .toast-icon {
    color: var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-error);
}

.toast-error .toast-icon {
    color: var(--color-error);
}

.toast-warning {
    border-left: 4px solid var(--color-warning);
}

.toast-warning .toast-icon {
    color: var(--color-warning);
}

.toast-info {
    border-left: 4px solid var(--color-info);
}

.toast-info .toast-icon {
    color: var(--color-info);
}

/* Toast 消失动画 */
.toast.hiding {
    animation: fadeOutUp var(--transition-normal) ease-in forwards;
}

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

/* ========================================
   7. 标签/徽章
   ======================================== */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    font-size: var(--font-size-xs);
    font-weight: var(--font-weight-medium);
    border-radius: var(--radius-full);
    white-space: nowrap;
}

.badge-primary {
    background: rgba(163, 230, 53, 0.15);
    color: var(--brand-primary);
}

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

.badge-success {
    background: rgba(74, 222, 128, 0.15);
    color: var(--color-success);
}

.badge-warning {
    background: rgba(251, 191, 36, 0.15);
    color: var(--color-warning);
}

.badge-error {
    background: rgba(248, 113, 113, 0.15);
    color: var(--color-error);
}

.badge-info {
    background: rgba(56, 189, 248, 0.15);
    color: var(--color-info);
}

/* ========================================
   8. 加载状态
   ======================================== */
.spinner {
    width: 24px;
    height: 24px;
    border: 3px solid var(--color-border);
    border-top-color: var(--brand-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner-sm {
    width: 16px;
    height: 16px;
    border-width: 2px;
}

.spinner-lg {
    width: 40px;
    height: 40px;
    border-width: 4px;
}

/* 骨架屏 */
.skeleton {
    background: linear-gradient(90deg, 
        var(--color-bg-hover) 25%, 
        var(--color-bg) 50%, 
        var(--color-bg-hover) 75%
    );
    background-size: 200% 100%;
    animation: skeleton-shimmer 1.5s infinite;
    border-radius: var(--radius-sm);
}

@keyframes skeleton-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 16px;
    margin-bottom: var(--spacing-sm);
}

.skeleton-title {
    height: 24px;
    width: 60%;
    margin-bottom: var(--spacing-md);
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

/* 加载遮罩 */
.loading-overlay {
    position: fixed;
    inset: 0;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    z-index: var(--z-modal);
}

.theme-dark .loading-overlay {
    background: rgba(10, 10, 15, 0.9);
}

.loading-overlay.hidden {
    display: none;
}

/* ========================================
   9. 空状态
   ======================================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    text-align: center;
}

.empty-state-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.empty-state-title {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-primary);
    margin-bottom: var(--spacing-sm);
}

.empty-state-desc {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    max-width: 300px;
}

/* ========================================
   10. 进度条
   ======================================== */
.progress {
    height: 8px;
    background: var(--color-bg-hover);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar {
    height: 100%;
    background: var(--brand-primary);
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
}

.progress-bar.animated {
    background: linear-gradient(90deg, 
        var(--brand-primary) 0%, 
        #bef264 50%, 
        var(--brand-primary) 100%
    );
    background-size: 200% 100%;
    animation: progress-shimmer 2s linear infinite;
}

@keyframes progress-shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

/* ========================================
   11. 分隔线
   ======================================== */
.divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
}

.divider::before,
.divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--color-border);
}

.divider-vertical {
    width: 1px;
    height: 100%;
    background: var(--color-border);
}

/* ========================================
   12. 面包屑
   ======================================== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.breadcrumb-item {
    color: var(--color-text-muted);
}

.breadcrumb-item a {
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.breadcrumb-item a:hover {
    color: var(--brand-primary);
    text-decoration: none;
}

.breadcrumb-item:not(:last-child)::after {
    content: '/';
    margin-left: var(--spacing-sm);
    color: var(--color-text-muted);
}

.breadcrumb-item:last-child {
    color: var(--color-text-primary);
    font-weight: var(--font-weight-medium);
}

/* ========================================
   13. 提示框
   ======================================== */
.alert {
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    display: flex;
    gap: var(--spacing-sm);
}

.alert-icon {
    flex-shrink: 0;
    font-size: var(--font-size-lg);
}

.alert-content {
    flex: 1;
}

.alert-title {
    font-weight: var(--font-weight-medium);
    margin-bottom: 2px;
}

.alert-message {
    font-size: var(--font-size-sm);
    opacity: 0.9;
}

.alert-success {
    background: rgba(74, 222, 128, 0.1);
    border: 1px solid rgba(74, 222, 128, 0.3);
    color: var(--color-success);
}

.alert-warning {
    background: rgba(251, 191, 36, 0.1);
    border: 1px solid rgba(251, 191, 36, 0.3);
    color: var(--color-warning);
}

.alert-error {
    background: rgba(248, 113, 113, 0.1);
    border: 1px solid rgba(248, 113, 113, 0.3);
    color: var(--color-error);
}

.alert-info {
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.3);
    color: var(--color-info);
}

/* ========================================
   14. Tooltip
   ======================================== */
[data-tooltip] {
    position: relative;
}

[data-tooltip]::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-4px);
    padding: 6px 10px;
    background: var(--color-text-primary);
    color: var(--color-bg);
    font-size: var(--font-size-xs);
    border-radius: var(--radius-sm);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-fast);
    pointer-events: none;
    z-index: var(--z-tooltip);
}

[data-tooltip]:hover::after {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-8px);
}

/* ========================================
   15. 悬浮操作按钮 (FAB)
   ======================================== */
.fab {
    position: fixed;
    bottom: var(--spacing-lg);
    right: var(--spacing-lg);
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, #6366f1 0%, #a855f7 100%);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
    cursor: pointer;
    transition: all var(--transition-normal);
    z-index: var(--z-fixed);
}

.fab:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.5);
}

.fab:active {
    transform: scale(1.05);
}

/* ========================================
   Powered by Coze 标识
   ======================================== */
.powered-by-coze {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    background: var(--color-bg-elevated);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    text-decoration: none;
    transition: all var(--transition-fast);
    margin-top: var(--spacing-sm);
}

.powered-by-coze:hover {
    text-decoration: none;
    border-color: var(--color-text-muted);
    box-shadow: var(--shadow-sm);
    transform: translateY(-1px);
}

.powered-by-coze span {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.powered-by-coze img {
    height: 20px;
    width: auto;
    display: block;
}

/* 暗色主题下调整 Coze logo 颜色 */
.theme-dark .powered-by-coze img {
    filter: brightness(0) invert(1);
}

.theme-dark .powered-by-coze img path:first-child,
.theme-dark .powered-by-coze img path:nth-child(2),
.theme-dark .powered-by-coze img path:nth-child(3) {
    fill: white;
}

/* ========================================
   通用页脚样式
   ======================================== */
.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.system-info {
    display: none;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.system-version {
    padding: 2px 8px;
    background: var(--color-bg-hover);
    border-radius: var(--radius-sm);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Fira Mono', 'Droid Sans Mono', monospace;
}

.system-mode {
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-weight: var(--font-weight-medium);
}

.system-mode.dev-mode {
    background: rgba(251, 191, 36, 0.15);
    color: var(--color-warning);
    border: 1px solid rgba(251, 191, 36, 0.3);
}

/* 响应式：小屏幕时调整布局 */
@media (max-width: 480px) {
    .footer-content {
        padding: 0 var(--spacing-sm);
    }
    
    .system-info {
        flex-wrap: wrap;
        justify-content: center;
    }
}