.mobile-header {
                position: fixed;
                top: 0;
                left: 0;
                right: 0;
                z-index: 1000;
                height: 56px;
                background: #333333;
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 0 16px;
                box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
            }

            /* Logo */
            .header-logo img {
                height: 36px;
                width: auto;
                display: block;
            }

            /* 搜索触发按钮 */
            .search-trigger {
                color: #fff;
                font-size: 20px;
                padding: 8px;
                flex: 1;
                text-align: center;
                opacity: 0.8;
            }

            /* 汉堡菜单按钮 */
            .menu-toggle {
                width: 44px;
                height: 44px;
                display: flex;
                flex-direction: column;
                justify-content: center;
                align-items: center;
                gap: 5px;
                padding: 8px;
            }

            .menu-toggle .bar {
                display: block;
                width: 22px;
                height: 2px;
                background: #fff;
                border-radius: 2px;
                transition: all 0.3s ease;
            }

            /* 汉堡按钮激活态动画 */
            .menu-toggle.active .bar:nth-child(1) {
                transform: translateY(7px) rotate(45deg);
            }

            .menu-toggle.active .bar:nth-child(2) {
                opacity: 0;
            }

            .menu-toggle.active .bar:nth-child(3) {
                transform: translateY(-7px) rotate(-45deg);
            }

            /* ==================== 遮罩层 ==================== */
            .overlay {
                position: fixed;
                inset: 0;
                z-index: 998;
                background: rgba(0, 0, 0, 0.5);
                opacity: 0;
                visibility: hidden;
                transition: all 0.3s ease;
            }

            .overlay.active {
                opacity: 1;
                visibility: visible;
            }

            /* ==================== 侧滑菜单 ==================== */
            .sidebar-menu {
                position: fixed;
                top: 0;
                right: 0;
                bottom: 0;
                z-index: 999;
                width: 85%;
                max-width: 320px;
                background: #2a2a2a;
                transform: translateX(100%);
                transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
                display: flex;
                flex-direction: column;
                overflow-y: auto;
                -webkit-overflow-scrolling: touch;
            }

            .sidebar-menu.active {
                transform: translateX(0);
            }

            /* 菜单内搜索框 */
            .sidebar-search {
                padding: 20px 16px 12px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
                margin-top: 50px;
                display: flex;
            }

            .sidebar-search input {
                width: 100%;
                height: 40px;
                padding: 0 12px;
                background: #3d3d3d;
                border: 1px solid #555;
                color: #fff;
                font-size: 14px;
                outline: none;
            }

            .sidebar-search input::placeholder {
                color: #999;
            }

            .sidebar-search input:focus {
                border-color: #FF9800;
            }

            /* 用户信息区 */
            .sidebar-user {
                padding: 16px;
                display: flex;
                align-items: center;
                gap: 10px;
                border-bottom: 1px solid rgba(255, 255, 255, 0.08);
            }

            .sidebar-user .greeting {
                color: #FF9800;
                font-size: 14px;
                font-weight: 600;
            }

            .sidebar-user .btn-publish {
                margin-left: auto;
                padding: 6px 14px;
                background: #FF9800;
                color: #fff;
                font-size: 11px;
                font-weight: 700;
                border-radius: 4px;
                letter-spacing: 0.5px;
                white-space: nowrap;
            }

            /* ==================== 导航列表 ==================== */
            .nav-list {
                padding: 8px 0;
                flex: 1;
            }

            /* 一级菜单项 */
            .nav-item {
                display: flex;
                align-items: center;
                justify-content: space-between;
                padding: 0 16px;
                height: 52px;
                color: #ffffff;
                font-size: 15px;
                font-weight: 500;
                letter-spacing: 0.5px;
                transition: background 0.2s;
            }

            .nav-item:active {
                background: rgba(255, 255, 255, 0.05);
            }

            .nav-item .caret {
                font-size: 10px;
                color: #888;
                transition: transform 0.3s ease;
            }

            .nav-item.expanded .caret {
                transform: rotate(180deg);
                color: #FF9800;
            }

            .nav-item.expanded {
                color: #FF9800;
            }

            /* 二级子菜单 */
            .submenu {
                max-height: 0;
                overflow: hidden;
                background: #222222;
                transition: max-height 0.35s cubic-bezier(0.4, 0, 0.2, 1);
            }

            .submenu.open {
                max-height: 500px;
            }

            .submenu li a {
                display: block;
                padding: 0 16px 0 32px;
                height: 46px;
                line-height: 46px;
                color: #bbbbbb;
                font-size: 14px;
                border-left: 3px solid transparent;
                transition: all 0.2s;
            }

            .submenu li a:active,
            .submenu li a.active {
                color: #FF9800;
                background: rgba(255, 152, 0, 0.06);
                border-left-color: #FF9800;
            }

            /* ==================== 底部操作区 ==================== */
            .sidebar-footer {
                padding: 16px;
                border-top: 1px solid rgba(255, 255, 255, 0.08);
                display: flex;
                flex-direction: column;
                gap: 10px;
            }

            .btn-login {
                width: 100%;
                height: 44px;
                border: 1px solid rgba(255, 255, 255, 0.3);
                border-radius: 6px;
                color: #fff;
                font-size: 14px;
                font-weight: 600;
                letter-spacing: 0.5px;
            }

            .btn-contact {
                width: 100%;
                height: 44px;
                background: #FF9800;
                border-radius: 6px;
                color: #fff;
                font-size: 14px;
                font-weight: 700;
                letter-spacing: 0.5px;
            }

            /* ==================== 页面占位内容 ==================== */
            .page-content {
                padding: 72px 16px 32px;
            }

            .page-content h1 {
                font-size: 22px;
                margin-bottom: 12px;
                color: #333;
            }

            .page-content p {
                font-size: 14px;
                color: #666;
                line-height: 1.8;
            }

            #searchInput {
                width: 85%;
            }

            .btn-search {
                    border: none;
                width: 15%;
                height: 40px;
                background: #FF9800;
                color: #fff;
                /* font-size: 14px; */
                /* font-weight: 700; */
                /* letter-spacing: 0.5px; */
            }