/* --- 全局与变量定义 --- */
:root {
    --bg-color: #f8f9fa;
    --surface-color: #ffffff;
    --primary-color: #4f46e5;
    --primary-color-hover: #4338ca;
    --danger-color: #e11d48;
    --danger-color-hover: #be123c;
    --success-color: #22c55e;
    --success-color-hover: #16a34a;
    --warning-color: #f59e0b;
    --warning-color-hover: #d97706;
    --checking-color: #f59e0b;
    --text-color: #1f2937;
    --text-color-secondary: #6b7280;
    --scrollbar-track-color: transparent;
    --scrollbar-thumb-color: #d1d5db;
    --scrollbar-thumb-hover-color: #9ca3af;
    --border-color: #e5e7eb;
    --border-radius-large: 12px;
    --border-radius-small: 8px;
    --font-family: 'Inter', sans-serif;
    --sidebar-width: 260px;
    --transition-speed: 0.3s;
}

[data-theme="dark"] {
    --bg-color: #111827;
    --surface-color: #1f2937;
    --text-color: #f9fafb;
    --text-color-secondary: #9ca3af;
    --border-color: #374151;
    --scrollbar-thumb-color: #4b5563;
    --scrollbar-thumb-hover-color: #6b7280;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    overflow: hidden;
    /* 防止主页面滚动条出现, 内部组件自行管理滚动 */
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.hidden {
    display: none !important;
}

/* --- 自定义滚动条样式 (适用于 Webkit 内核浏览器) --- */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--scrollbar-track-color);
}

::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb-color);
    border-radius: 10px;
    border: 2px solid transparent;
    background-clip: content-box;
    /* 使边框内缩 */
}

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

/* --- 自定义滚动条样式 (适用于 Firefox) --- */
* {
    scrollbar-width: thin;
    /* 使滚动条更窄 */
    scrollbar-color: var(--scrollbar-thumb-color) var(--scrollbar-track-color);
}

/* --- 登录页样式 --- */
.login-page-body {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 40px;
    background-color: var(--surface-color);
    border-radius: var(--border-radius-large);
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.05);
    text-align: center;
}

.login-header {
    margin-bottom: 32px;
}

.login-header .fa-rocket,
.login-header .fa-magic-wand-sparkles {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.login-header h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.login-header p {
    color: var(--text-color-secondary);
}

#login-form .form-group,
#init-form .form-group {
    text-align: left;
    margin-bottom: 20px;
}

.btn-login {
    margin-top: 16px;
    width: 100%;
    justify-content: space-between;
    /* 内部元素左右对齐 */
    padding-left: 24px;
    padding-right: 24px;
}

/* --- Toast 提示样式 --- */
.toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    width: 320px;
    opacity: 0;
    transform: translateX(100%);
    /* 初始位置在屏幕外 */
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.toast.show {
    opacity: 1;
    transform: translateX(0);
    /* 显示时滑入 */
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-message {
    flex-grow: 1;
    font-size: 0.9rem;
    font-weight: 500;
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-color-secondary);
    cursor: pointer;
    font-size: 1.1rem;
    padding: 4px;
}

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

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

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

/* --- Dialog 确认框样式 --- */
#dialog-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    /* 默认隐藏 */
    transition: opacity 0.2s ease, visibility 0.2s;
}

#dialog-container.active {
    opacity: 1;
    visibility: visible;
}

.dialog-box {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-large);
    padding: 24px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    text-align: center;
    transform: scale(0.95);
    /* 初始略微缩小 */
    transition: transform 0.2s ease;
}

#dialog-container.active .dialog-box {
    transform: scale(1);
    /* 显示时放大 */
}

.dialog-message {
    margin: 16px 0 24px;
    font-size: 1rem;
    color: var(--text-color-secondary);
}

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

.dialog-actions .btn {
    width: auto;
    /* 按钮宽度自适应 */
}

/* --- Modal 模态框样式 --- */
#modal-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1500;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(0, 0, 0, 0.4);
    opacity: 0;
    visibility: hidden;
    /* 默认隐藏 */
    transition: opacity 0.2s ease, visibility 0.2s;
}

#modal-container.active {
    opacity: 1;
    visibility: visible;
}

#modal-container .modal-box {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-large);
    width: 90%;
    max-width: 500px;
    text-align: left;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    transform: scale(0.95) translateY(-10px);
    /* 初始略微缩小并上移 */
    transition: transform 0.25s ease;
}

#modal-container.active .modal-box {
    transform: scale(1) translateY(0);
    /* 显示时放大并恢复位置 */
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    margin: 0;
    font-size: 1.2rem;
}

.modal-content {
    padding: 24px;
    max-height: 60vh;
    /* 限制内容高度, 避免模态框过高 */
    overflow-y: auto;
    /* 内容超出时显示滚动条 */
}

ul.preset-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

ul.preset-list li {
    padding: 12px 16px;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: background-color 0.2s ease;
}

ul.preset-list li:hover {
    background-color: var(--bg-color);
}

ul.preset-list li p {
    font-size: 0.85rem;
    color: var(--text-color-secondary);
    margin-top: 4px;
}

/* --- 主应用布局 --- */
.app-container {
    display: flex;
    height: 100vh;
}

.main-content {
    flex-grow: 1;
    /* 占据剩余空间 */
    padding: 24px 32px;
    overflow-y: auto;
    /* 允许内容垂直滚动 */
}

/* --- 视图切换动画 --- */
#view-container {
    position: relative;
}

.view {
    animation: fadeIn 0.5s ease;
    /* 视图切换时的淡入动画 */
}

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

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* --- 侧边栏 --- */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--surface-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border-color);
    flex-shrink: 0;
    /* 防止侧边栏被挤压 */
    transition: transform var(--transition-speed) ease, background-color var(--transition-speed), border-color var(--transition-speed);
}

.sidebar-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 32px;
    font-size: 1.5rem;
    color: var(--primary-color);
}

.sidebar-header h1 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
}

.sidebar-nav {
    flex-grow: 1;
    /* 占据剩余空间 */
}

.sidebar-nav ul li a {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 12px;
    border-radius: var(--border-radius-small);
    color: var(--text-color-secondary);
    font-weight: 500;
    transition: all 0.2s ease;
}

.sidebar-nav ul li a:hover {
    background-color: var(--bg-color);
    color: var(--text-color);
}

.sidebar-nav ul li a.active {
    background-color: var(--primary-color);
    color: white;
}

.sidebar-nav ul li a.active i {
    color: white;
}

.sidebar-bottom {
    margin-top: auto;
    /* 推到底部 */
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    transition: border-color var(--transition-speed);
}

.theme-switcher {
    display: flex;
    justify-content: space-around;
    align-items: center;
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: var(--border-radius-small);
    margin-bottom: 16px;
    transition: background-color var(--transition-speed);
}

.theme-switcher i {
    color: var(--text-color-secondary);
}

.switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: #ccc;
    border-radius: 24px;
    transition: var(--transition-speed);
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: var(--transition-speed);
}

input:checked+.slider {
    background-color: var(--primary-color);
}

input:checked+.slider:before {
    transform: translateX(20px);
}

.caddy-control-panel {
    margin-top: 16px;
    padding: 12px;
    background-color: var(--bg-color);
    border-radius: var(--border-radius-small);
    transition: background-color var(--transition-speed);
}

#caddy-action-button-container {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.caddy-status {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.status-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    transition: background-color var(--transition-speed);
}

.status-dot.running {
    background-color: var(--success-color);
}

.status-dot.stopped {
    background-color: var(--danger-color);
}

.status-dot.checking {
    background-color: var(--checking-color);
}

.status-dot.error {
    background-color: var(--text-color-secondary);
}

.status-text {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-color-secondary);
}

.logout-section {
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    transition: border-color var(--transition-speed);
}

/* 侧边栏遮罩层 (仅用于移动端) */
.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    z-index: 199;
    /* 位于侧边栏下方 */
    opacity: 0;
    visibility: hidden;
    /* 默认隐藏 */
    transition: opacity 0.3s ease, visibility 0.3s;
}

.sidebar-overlay.is-visible {
    opacity: 1;
    visibility: visible;
}

/* --- 主内容区头部样式 --- */
.main-header {
    display: flex;
    align-items: center;
    margin-bottom: 24px;
}

.main-header h2 {
    font-size: 1.75rem;
    font-weight: 700;
    flex-grow: 1;
}

#menu-toggle-btn {
    display: none;
    /* 默认隐藏, 仅在小屏幕显示 */
    margin-right: 16px;
}

/* --- 卡片面板样式 --- */
.card-panel {
    background-color: var(--surface-color);
    border-radius: var(--border-radius-large);
    padding: 24px;
    margin-bottom: 24px;
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.form-panel-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 24px;
}

.form-panel-header h3 {
    flex-grow: 1;
}

/* --- 按钮样式 --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: var(--border-radius-small);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
    /* 默认宽度为100% */
}

.btn:active {
    transform: scale(0.97);
    /* 点击时轻微缩小 */
}

.btn:disabled {
    background-color: #e5e7eb;
    color: #9ca3af;
    cursor: not-allowed;
    border-color: transparent;
    transform: none;
    /* 禁用时无动画 */
}

[data-theme="dark"] .btn:disabled {
    background-color: #374151;
    color: #6b7280;
}

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

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

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-color);
    border-color: var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    border-color: #ced4da;
    background-color: var(--bg-color);
}

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

.btn-danger:hover:not(:disabled) {
    background-color: var(--danger-color-hover);
}

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

.btn-success:hover:not(:disabled) {
    background-color: var(--success-color-hover);
}

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

.btn-warning:hover:not(:disabled) {
    background-color: var(--warning-color-hover);
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.875rem;
    width: auto;
    /* 小按钮宽度自适应 */
}

.btn-icon {
    background: none;
    border: none;
    color: var(--text-color-secondary);
    cursor: pointer;
    width: 40px;
    height: 40px;
    font-size: 1.1rem;
    border-radius: 50%;
    width: auto;
    /* 图标按钮宽度自适应 */
}

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

.btn-link {
    background: none;
    border: none;
    color: var(--primary-color);
    cursor: pointer;
    font-weight: 600;
    padding: 4px 8px;
    width: auto;
    /* 链接按钮宽度自适应 */
}

.btn-link:hover {
    text-decoration: underline;
}

.main-header .btn-primary {
    width: auto;
    /* 主头部按钮宽度自适应 */
}

.form-actions .btn {
    width: auto;
    /* 表单操作按钮宽度自适应 */
}

/* --- 配置列表样式 --- */
.config-list-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.config-item {
    display: flex;
    align-items: center;
    padding: 12px 16px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    transition: all 0.2s ease;
}

.config-item:hover {
    transform: translateY(-2px);
    /* 悬停时轻微上浮 */
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.05);
}

.config-item-name {
    font-weight: 500;
    flex-grow: 1;
}

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

/* --- 表单样式 --- */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    /* 响应式网格布局 */
    gap: 24px;
    margin-bottom: 24px;
}

.form-group label,
fieldset legend {
    display: block;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-color-secondary);
    font-size: 0.875rem;
}

.form-group input {
    width: 100%;
    padding: 12px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-color);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s, background-color var(--transition-speed);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

/* 重置数字输入框的默认样式 (移除上下箭头) */
input[type="number"] {
    -moz-appearance: textfield;
    /* Firefox */
}

input[type="number"]::-webkit-inner-spin-button,
input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    /* Chrome, Safari */
    margin: 0;
}

fieldset {
    border: none;
    padding: 0;
    margin: 0 0 24px 0;
}

.sub-fieldset {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 16px;
    margin-top: 20px;
}

.sub-legend-group {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.sub-legend-group .sub-legend {
    margin-bottom: 0;
}

.sub-legend {
    font-weight: 500;
    color: var(--text-color-secondary);
    font-size: 0.875rem;
    margin-bottom: 12px;
}

.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 16px;
    margin-top: 8px;
}

.custom-checkbox {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
    gap: 12px;
}

.custom-checkbox input {
    display: none;
    /* 隐藏原生复选框 */
}

.custom-checkbox .checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    transition: all 0.2s;
}

.custom-checkbox input:checked+.checkmark {
    background-color: var(--primary-color);
    border-color: var(--primary-color);
}

.custom-checkbox .checkmark::after {
    content: "\f00c";
    /* Font Awesome 对勾图标 */
    font-family: "Font Awesome 6 Free";
    font-weight: 900;
    font-size: 12px;
    color: white;
    position: absolute;
    top: 3px;
    left: 3px;
    transform: scale(0);
    /* 默认隐藏 */
    transition: transform 0.2s;
}

.custom-checkbox input:checked+.checkmark::after {
    transform: scale(1);
    /* 选中时显示 */
}

.header-entry {
    display: grid;
    grid-template-columns: 1fr 1fr auto;
    /* 键、值、删除按钮 */
    gap: 12px;
    margin-bottom: 12px;
    align-items: center;
    /* 确保所有元素垂直居中对齐 */
}

.header-entry input {
    width: 100%;
    padding: 10px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-color);
}

/* --- 分段控制器样式 --- */
.segmented-control {
    position: relative;
    display: flex;
    width: 100%;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    padding: 4px;
    transition: background-color var(--transition-speed), border-color var(--transition-speed);
}

.segmented-control button {
    flex: 1;
    /* 均分空间 */
    padding: 8px 12px;
    border: none;
    background-color: transparent;
    color: var(--text-color-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: color 0.2s ease;
    z-index: 2;
    /* 确保按钮在滑块之上 */
}

.segmented-control button:hover {
    color: var(--text-color);
}

.segmented-control button.active {
    color: white;
}

[data-theme="dark"] .segmented-control button.active {
    color: var(--text-color);
    /* 深色模式下保持文本颜色 */
}

#segmented-control-slider {
    position: absolute;
    top: 4px;
    bottom: 4px;
    background-color: var(--primary-color);
    border-radius: 6px;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), width 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    /* 平滑过渡 */
    z-index: 1;
}

/* --- 自定义选择框样式 --- */
.custom-select {
    position: relative;
}

/* 统一 .select-selected 的外观, 使其与 input 文本框一致 */
.select-selected {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 12px;
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    color: var(--text-color);
    font-size: 1rem;
    font-family: inherit;
    cursor: pointer;
    user-select: none;
    transition: border-color 0.2s, box-shadow 0.2s, background-color var(--transition-speed);
    line-height: 1.5;
    /* 与input的字体和内边距计算出的行高一致 */
    /* 准确计算高度: font-size * line-height + padding-top + padding-bottom + border-top + border-bottom */
    height: calc(1em * 1.5 + 12px * 2 + 1px * 2);
}

.select-selected.select-arrow-active {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(79, 70, 229, 0.2);
}

.select-selected::after {
    content: '\f078';
    /* Font Awesome 向下箭头图标 */
    font-family: 'Font Awesome 6 Free';
    font-weight: 900;
    transition: transform var(--transition-speed) ease;
}

.select-selected.select-arrow-active::after {
    transform: rotate(180deg);
    /* 展开时箭头旋转 */
}

.select-items {
    position: absolute;
    background-color: var(--surface-color);
    top: 100%;
    /* 位于选择框下方 */
    left: 0;
    right: 0;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-small);
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.1);
    z-index: 99;
    margin-top: 8px;
    max-height: 200px;
    overflow-y: auto;
    /* 选项过多时滚动 */
    opacity: 0;
    transform: translateY(-10px);
    /* 默认略微上移 */
    visibility: hidden;
    /* 默认隐藏 */
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0.2s;
}

.select-items.select-show {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
}

.select-items div {
    padding: 12px 16px;
    cursor: pointer;
    transition: background-color 0.2s;
}

.select-items div:hover,
.same-as-selected {
    background-color: var(--bg-color);
}

/* --- 渲染输出面板样式 --- */
#rendered-output-panel pre {
    background-color: var(--bg-color);
    padding: 16px;
    border-radius: var(--border-radius-small);
    overflow-x: auto;
    /* 允许代码水平滚动 */
    white-space: pre-wrap;
    /* 自动换行 */
    word-break: break-all;
    /* 单词内断行 */
    border: 1px solid var(--border-color);
    transition: background-color var(--transition-speed);
}

/* --- 角落语言切换器样式 --- */
.language-switcher-corner {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 100;
}
.language-switcher-corner .btn-icon {
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    width: 48px;
    height: 48px;
    font-size: 1.25rem;
}
.language-switcher-corner .btn-icon:hover {
    background-color: var(--bg-color);
    border-color: var(--primary-color);
}
.language-switcher-corner ul {
    position: absolute;
    bottom: 60px; /* 在按钮上方 */
    right: 0;
    list-style: none;
    padding: 8px;
    margin: 0;
    background-color: var(--surface-color);
    border-radius: var(--border-radius-small);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    border: 1px solid var(--border-color);
    width: 150px;
}
.language-switcher-corner ul li {
    padding: 8px 12px;
    cursor: pointer;
    border-radius: 6px;
    font-weight: 500;
}
.language-switcher-corner ul li:hover {
    background-color: var(--bg-color);
}
.language-switcher-corner ul li.active {
    background-color: var(--primary-color);
    color: white;
}
/* --- 响应式设计 (媒体查询) --- */
@media (max-width: 992px) {
    .sidebar {
        position: fixed;
        /* 在小屏幕上脱离文档流 */
        z-index: 200;
        /* 确保在最上层 */
        height: 100%;
        transform: translateX(-100%);
        /* 默认隐藏在左侧 */
        box-shadow: 0 0 20px rgba(0, 0, 0, 0.1);
        /* 添加阴影效果 */
    }

    .sidebar.is-open {
        transform: translateX(0);
        /* 打开时滑入 */
    }

    #menu-toggle-btn {
        display: inline-flex;
        /* 仅在小屏幕上显示菜单切换按钮 */
    }

    .main-header .btn-text {
        display: none;
        /* 在小屏幕上隐藏按钮内的长文本 */
    }

    /* 隐藏侧边栏导航和底部区域的文本, 只显示图标 */
    .main-header .btn-primary .btn-text {
        display: none;
    }

    .main-content {
        padding: 16px;
        /* 调整小屏幕内边距 */
    }
}