* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    user-select: none;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    overflow: hidden;
    height: 100vh;
    width: 100vw;
}

/* 桌面背景 */
.desktop {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 50%, #667eea 100%);
    position: relative;
    overflow: hidden;
}

.desktop::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(100, 200, 255, 0.1) 0%, transparent 70%);
    pointer-events: none;
}

/* 桌面图标 */
.desktop-icons {
    position: absolute;
    top: 20px;
    left: 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    z-index: 1;
}

.desktop-icon {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 10px;
    border-radius: 8px;
    transition: all 0.2s ease;
    width: 80px;
}

.desktop-icon:hover {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

.desktop-icon:active {
    background: rgba(255, 255, 255, 0.2);
}

.icon-wrapper {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

.icon-browser {
    color: #4fc3f7;
}

.icon-about {
    color: #81c784;
}

.icon-fullscreen {
    color: #ffb74d;
}

.desktop-icon span {
    color: white;
    font-size: 12px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    text-align: center;
    line-height: 1.3;
}

/* 窗口 */
.window {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -55%);
    width: 90%;
    max-width: 1100px;
    height: 80%;
    max-height: 700px;
    background: #f5f5f5;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(255, 255, 255, 0.1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    z-index: 10;
    transition: all 0.3s ease;
}

.window.maximized {
    top: 0;
    left: 0;
    transform: none;
    width: 100%;
    height: calc(100% - 48px);
    max-width: none;
    max-height: none;
    border-radius: 0;
}

.window.minimized {
    transform: translate(-50%, 100vh) scale(0.1);
    opacity: 0;
    pointer-events: none;
}

/* 窗口标题栏 */
.window-header {
    background: linear-gradient(180deg, #2d2d2d 0%, #1e1e1e 100%);
    padding: 8px 12px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: move;
    min-height: 40px;
}

.window-title {
    display: flex;
    align-items: center;
    gap: 8px;
    color: #fff;
    font-size: 13px;
    font-weight: 500;
}

.window-title i {
    color: #4fc3f7;
}

.window-controls {
    display: flex;
    gap: 6px;
}

.window-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
}

.window-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.window-btn.close:hover {
    background: #e81123;
}

.window-btn.minimize:hover {
    background: #3a3a3a;
}

.window-btn.maximize:hover {
    background: #3a3a3a;
}

/* 标签页栏 */
.tabs-bar {
    background: #1e1e1e;
    padding: 4px 8px 0 8px;
    display: flex;
    align-items: center;
    gap: 4px;
    border-bottom: 1px solid #333;
}

.tabs-container {
    display: flex;
    gap: 2px;
    flex: 1;
    overflow-x: auto;
    scrollbar-width: thin;
}

.tabs-container::-webkit-scrollbar {
    height: 4px;
}

.tabs-container::-webkit-scrollbar-track {
    background: transparent;
}

.tabs-container::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 2px;
}

.tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: #2d2d2d;
    color: #ccc;
    font-size: 12px;
    cursor: pointer;
    border-radius: 6px 6px 0 0;
    min-width: 150px;
    max-width: 200px;
    transition: all 0.2s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.tab:hover {
    background: #3a3a3a;
}

.tab.active {
    background: #f5f5f5;
    color: #333;
}

.tab-title {
    flex: 1;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.tab-close {
    width: 18px;
    height: 18px;
    border: none;
    background: transparent;
    color: inherit;
    cursor: pointer;
    border-radius: 3px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    opacity: 0.7;
}

.tab-close:hover {
    background: rgba(0, 0, 0, 0.1);
    opacity: 1;
}

.new-tab-btn {
    width: 28px;
    height: 28px;
    border: none;
    background: transparent;
    color: #ccc;
    cursor: pointer;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.new-tab-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

/* 浏览器工具栏 */
.browser-toolbar {
    background: #f5f5f5;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid #ddd;
}

.nav-buttons {
    display: flex;
    gap: 4px;
}

.nav-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: #666;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-btn:hover {
    background: #e0e0e0;
    color: #333;
}

.nav-btn:active {
    background: #d0d0d0;
}

.url-bar {
    flex: 1;
    display: flex;
    align-items: center;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 20px;
    padding: 4px 4px 4px 12px;
    transition: all 0.2s ease;
}

.url-bar:focus-within {
    border-color: #2196f3;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.url-icon {
    color: #4caf50;
    margin-right: 8px;
    font-size: 12px;
}

.url-bar input {
    flex: 1;
    background: transparent;
    border: none;
    color: #333;
    font-size: 13px;
    outline: none;
    padding: 4px 0;
}

.url-bar input::placeholder {
    color: #999;
}

.go-btn {
    width: 28px;
    height: 28px;
    border: none;
    border-radius: 50%;
    background: #2196f3;
    color: white;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 11px;
}

.go-btn:hover {
    background: #1976d2;
    transform: scale(1.05);
}

.toolbar-right {
    display: flex;
    gap: 4px;
}

/* 浏览器视口 */
.browser-viewport {
    flex: 1;
    background: #fff;
    position: relative;
    overflow: hidden;
    cursor: crosshair;
}

.screenshot-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.screenshot-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    display: block;
}

/* 加载遮罩 */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(255, 255, 255, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-icon {
    font-size: 36px;
    color: #2196f3;
    margin-bottom: 12px;
}

.loading-text {
    font-size: 14px;
    color: #666;
}

/* 键盘捕获（隐藏） */
.keyboard-capture {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

/* 状态栏 */
.status-bar {
    background: #f5f5f5;
    padding: 6px 12px;
    display: flex;
    gap: 20px;
    border-top: 1px solid #ddd;
    font-size: 11px;
    color: #666;
}

.status-item {
    display: flex;
    align-items: center;
    gap: 6px;
}

.status-item i {
    color: #999;
    font-size: 10px;
}

.status-item span {
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* 任务栏 */
.taskbar {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 48px;
    background: rgba(30, 30, 30, 0.95);
    backdrop-filter: blur(20px);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 8px;
    z-index: 100;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.taskbar-left {
    display: flex;
    align-items: center;
}

.start-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: transparent;
    border: none;
    color: #fff;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 13px;
    font-weight: 500;
}

.start-btn:hover {
    background: rgba(255, 255, 255, 0.1);
}

.start-btn i {
    color: #4fc3f7;
    font-size: 18px;
}

.taskbar-center {
    flex: 1;
    display: flex;
    justify-content: center;
}

.taskbar-items {
    display: flex;
    gap: 4px;
}

.taskbar-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 16px;
    background: rgba(255, 255, 255, 0.05);
    border: none;
    color: #fff;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.2s ease;
    font-size: 12px;
    border-bottom: 2px solid transparent;
}

.taskbar-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.taskbar-item.active {
    background: rgba(255, 255, 255, 0.15);
    border-bottom-color: #4fc3f7;
}

.taskbar-right {
    display: flex;
    align-items: center;
    gap: 12px;
}

.system-tray {
    display: flex;
    gap: 10px;
    color: #ccc;
    font-size: 12px;
}

.clock {
    color: #fff;
    font-size: 12px;
    padding: 4px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.clock:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* 开始菜单 */
.start-menu {
    position: absolute;
    bottom: 56px;
    left: 8px;
    width: 320px;
    background: rgba(30, 30, 30, 0.98);
    backdrop-filter: blur(20px);
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
    z-index: 200;
    display: none;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.start-menu.show {
    display: block;
    animation: slideUp 0.2s ease;
}

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

.start-menu-header {
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.user-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.user-name {
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 2px;
}

.user-status {
    color: #4caf50;
    font-size: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.user-status::before {
    content: '';
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #4caf50;
}

.start-menu-apps {
    padding: 12px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
}

.app-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: #fff;
}

.app-item:hover {
    background: rgba(255, 255, 255, 0.1);
}

.app-icon {
    font-size: 28px;
    margin-bottom: 4px;
}

.app-item span {
    font-size: 11px;
    text-align: center;
}

.start-menu-footer {
    padding: 12px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.power-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    color: #ccc;
    font-size: 12px;
}

.power-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.power-btn i {
    color: #f44336;
}

/* Toast */
.toast {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    transform: translateX(120%);
    transition: transform 0.3s ease;
}

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

.toast-content {
    background: rgba(0, 0, 0, 0.9);
    backdrop-filter: blur(10px);
    padding: 12px 20px;
    border-radius: 10px;
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 13px;
    font-weight: 500;
    color: #fff;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.toast-icon.success {
    color: #4caf50;
}

.toast-icon.error {
    color: #f44336;
}

.toast-icon.info {
    color: #2196f3;
}

/* 关于对话框 */
.about-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

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

.about-content {
    background: #fff;
    border-radius: 16px;
    padding: 32px;
    width: 90%;
    max-width: 400px;
    text-align: center;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.about-header {
    margin-bottom: 20px;
}

.about-icon {
    font-size: 48px;
    color: #2196f3;
    margin-bottom: 12px;
}

.about-header h2 {
    font-size: 22px;
    color: #333;
    font-weight: 600;
}

.about-body {
    margin-bottom: 24px;
}

.about-body p {
    color: #666;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 8px;
}

.about-features {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 20px;
}

.feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.feature i {
    font-size: 24px;
    color: #2196f3;
}

.feature span {
    font-size: 12px;
    color: #666;
}

.about-close {
    padding: 10px 32px;
    background: #2196f3;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.about-close:hover {
    background: #1976d2;
    transform: translateY(-1px);
}

/* 全屏模式 */
.desktop.fullscreen .taskbar,
.desktop.fullscreen .desktop-icons,
.desktop.fullscreen .start-menu {
    display: none;
}

.desktop.fullscreen .window {
    top: 0;
    left: 0;
    transform: none;
    width: 100%;
    height: 100%;
    max-width: none;
    max-height: none;
    border-radius: 0;
}

/* 桌面图标新增样式 */
.icon-folder {
    color: #ffb74d;
}
.icon-docs {
    color: #81c784;
}
.icon-notepad {
    color: #ba68c8;
}

/* 文件管理器窗口 */
.file-manager-window {
    width: 700px;
    height: 500px;
}

.fm-toolbar {
    background: #f5f5f5;
    padding: 8px 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid #ddd;
}

.fm-btn {
    width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: #666;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
}

.fm-btn:hover {
    background: #e0e0e0;
    color: #333;
}

.fm-path {
    flex: 1;
    background: #fff;
    border: 1px solid #ddd;
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 13px;
    color: #333;
    margin: 0 8px;
}

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

.fm-content {
    flex: 1;
    background: #fff;
    overflow-y: auto;
    padding: 16px;
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: 16px;
}

.fm-loading {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    color: #999;
    font-size: 14px;
    padding: 40px;
}

.fm-loading i {
    color: #2196f3;
}

.fm-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    width: 80px;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.fm-item:hover {
    background: #e3f2fd;
}

.fm-item.selected {
    background: #bbdefb;
}

.fm-item-icon {
    font-size: 36px;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.fm-item-icon.folder {
    color: #ffb74d;
}

.fm-item-icon.file {
    color: #90caf9;
}

.fm-item-icon.text {
    color: #a5d6a7;
}

.fm-item-name {
    font-size: 12px;
    color: #333;
    text-align: center;
    word-break: break-all;
    line-height: 1.3;
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
}

.fm-status-bar {
    background: #f5f5f5;
    padding: 6px 12px;
    border-top: 1px solid #ddd;
    font-size: 11px;
    color: #666;
}

/* 记事本窗口 */
.notepad-window {
    width: 600px;
    height: 450px;
}

.notepad-menu {
    background: #f5f5f5;
    padding: 4px 8px;
    display: flex;
    gap: 4px;
    border-bottom: 1px solid #ddd;
}

.menu-item {
    padding: 6px 12px;
    font-size: 12px;
    color: #333;
    cursor: pointer;
    border-radius: 4px;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 6px;
}

.menu-item:hover {
    background: #e0e0e0;
}

.menu-item i {
    font-size: 11px;
    color: #666;
}

.notepad-content {
    flex: 1;
    background: #fff;
    overflow: hidden;
}

.notepad-content textarea {
    width: 100%;
    height: 100%;
    border: none;
    outline: none;
    resize: none;
    padding: 12px;
    font-size: 14px;
    font-family: 'Consolas', 'Monaco', monospace;
    line-height: 1.6;
    color: #333;
}

.notepad-content textarea::placeholder {
    color: #ccc;
}

.notepad-status-bar {
    background: #f5f5f5;
    padding: 6px 12px;
    border-top: 1px solid #ddd;
    font-size: 11px;
    color: #666;
}

/* 模态对话框 */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: #fff;
    border-radius: 12px;
    width: 90%;
    max-width: 360px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    animation: modalIn 0.2s ease;
    overflow: hidden;
}

.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid #eee;
}

.modal-header h3 {
    font-size: 16px;
    color: #333;
    font-weight: 600;
}

.modal-body {
    padding: 20px;
}

.modal-body input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid #ddd;
    border-radius: 8px;
    font-size: 14px;
    color: #333;
    outline: none;
    transition: all 0.2s ease;
}

.modal-body input:focus {
    border-color: #2196f3;
    box-shadow: 0 0 0 3px rgba(33, 150, 243, 0.1);
}

.modal-body input::placeholder {
    color: #999;
}

.save-path {
    margin-bottom: 12px;
    font-size: 13px;
    color: #666;
}

.save-path span:last-child {
    color: #333;
    font-weight: 500;
}

.modal-footer {
    padding: 12px 20px;
    border-top: 1px solid #eee;
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

.btn {
    padding: 8px 20px;
    border: none;
    border-radius: 6px;
    font-size: 13px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.btn-secondary {
    background: #f5f5f5;
    color: #666;
}

.btn-secondary:hover {
    background: #e0e0e0;
    color: #333;
}

.btn-primary {
    background: #2196f3;
    color: #fff;
}

.btn-primary:hover {
    background: #1976d2;
}

/* 响应式 */
@media (max-width: 768px) {
    .desktop-icons {
        display: none;
    }
    
    .window {
        width: 95%;
        height: 85%;
    }
    
    .file-manager-window,
    .notepad-window {
        width: 95%;
        height: 75%;
    }
    
    .tabs-container {
        max-width: 200px;
    }
    
    .tab {
        min-width: 100px;
        max-width: 120px;
    }
    
    .start-menu {
        width: calc(100% - 16px);
        left: 8px;
    }
    
    .taskbar-item span {
        display: none;
    }
    
    .system-tray {
        display: none;
    }
}