:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --dark-color: #2c3e50;
    --light-color: #ecf0f1;
    --gray-color: #95a5a6;
    --transition-speed: 0.3s;
    --box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --gradient-bg: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

body {
    font-family: 'Roboto', 'Noto Sans SC', sans-serif;
    background-color: #f5f7fa;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

/* 自定义滚动条 */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
}

::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 5px;
}

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

/* 导航栏样式优化 */
.site-header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    transition: all var(--transition-speed) ease;
    width: 100vw;
    max-width: 100vw;
    padding: 0;
    margin: 0;
    left: 0;
    right: 0;
    overflow-x: hidden;
}

.header-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 5px 0;
    width: 100%;
    margin: 0;
}

.site-header .container {
    width: 100%;
    max-width: 100%;
    padding-left: 0;
    padding-right: 0;
    margin: 0;
}

.branding {
    display: flex;
    align-items: center;
    text-decoration: none;
    transition: transform var(--transition-speed);
}

.branding:hover {
    transform: scale(1.05);
}

.logo {
    width: 50px;
    height: 50px;
    margin-right: 10px;
    object-fit: contain; /* 防止图标变形 */
}

.site-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--dark-color);
    margin: 0;
    background: var(--gradient-bg);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.site-description {
    font-size: 14px;
    color: var(--gray-color);
}


/* 导航菜单 */
.main-navigation {
    margin-right: 0;
    display: flex;
    justify-content: flex-end;
    flex: 1;
    padding-right: 0;
    width: auto;
}

.main-navigation .menu {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    justify-content: flex-end;
    padding-right: 0;
}

.main-navigation .menu-item:last-child a {
    margin-right: 0;
    padding-right: 10px !important;
    position: relative;
    right: 0;
}

.main-navigation .menu-item {
    margin: 0 10px;
    position: relative;
}

.main-navigation .menu-item a {
    padding: 10px 20px;
    color: var(--dark-color);
    font-weight: 500;
    text-decoration: none;
    display: block;
    border-radius: 30px;
    transition: all var(--transition-speed);
    min-width: 80px;
    text-align: center;
    white-space: nowrap;
}

.main-navigation .menu-item a:hover,
.main-navigation .current-menu-item a {
    background: var(--gradient-bg);
    color: white;
    box-shadow: 0 4px 10px rgba(52, 152, 219, 0.3);
    transform: translateY(-2px);
}

/* 为当前选中的菜单项添加特殊样式 */
.main-navigation .current-menu-item a {
    position: relative;
    font-weight: 600;
}

/* 为当前选中的菜单项添加标记 */
.main-navigation .current-menu-item a::before {
    content: '';
    position: absolute;
    bottom: -3px;
    left: 50%;
    transform: translateX(-50%);
    width: 6px;
    height: 6px;
    background-color: white;
    border-radius: 50%;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.8);
}

/* 添加页面头部渐变遮罩效果 */
.page-head::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.9), rgba(46, 204, 113, 0.9));
    z-index: 1;
    opacity: 0.85;
}

/* 增强导航菜单项悬停效果 */
.main-navigation .menu-item a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: white;
    transition: all 0.3s ease;
    transform: translateX(-50%);
    opacity: 0;
}

.main-navigation .menu-item a:hover::after,
.main-navigation .current-menu-item a::after {
    width: 70%;
    opacity: 1;
    box-shadow: 0 0 5px rgba(255, 255, 255, 0.5);
}

/* 页面头部 */
.page-head {
    position: relative;
    padding: 100px 0;
    background-color: var(--primary-color);
    color: white;
    text-align: center;
    overflow: hidden;
    margin-bottom: 50px;
}

.page-head::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url('../decorate/cta-bg.png');
    background-size: cover;
    background-position: center;
    opacity: 0.8;
    z-index: 0;
}

.page-head::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.9), rgba(46, 204, 113, 0.9));
    z-index: 1;
}

.page-head .container {
    position: relative;
    z-index: 2;
}

.page-title {
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 20px;
    letter-spacing: 1px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    transform: translateY(20px);
    opacity: 0;
    animation: fadeInUp 1s forwards 0.3s;
}

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

/* 论文卡片样式 */
.paper-card {
    border: none;
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: all var(--transition-speed) ease;
    margin-bottom: 30px;
    cursor: pointer;
}

.paper-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.paper-card .row {
    margin: 0;
}

.paper-card .col-md-4 {
    padding: 0;
    position: relative;
    overflow: hidden;
}

.paper-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.paper-card:hover img {
    transform: scale(1.1);
}

.paper-card .col-md-8 {
    padding: 25px;
}

.card-title {
    font-weight: 700;
    font-size: 22px;
    margin-bottom: 10px;
    color: var(--dark-color);
    line-height: 1.3;
}

.paper-link {
    color: inherit;
    text-decoration: none;
    display: block;
}

.paper-link:hover {
    text-decoration: none;
}

.card-text {
    font-size: 15px;
    color: var(--gray-color);
    margin-bottom: 15px;
}

/* 摘要区域 */
.abstract {
    position: relative;
    max-height: 4.8em; /* 3行文字的高度 */
    overflow: hidden;
    transition: max-height 0.6s ease;
    margin-bottom: 15px;
    font-size: 15px;
    line-height: 1.6;
    color: #555;
    border-left: 3px solid var(--primary-color);
    padding-left: 15px;
    background: rgba(52, 152, 219, 0.05);
    padding: 15px;
    border-radius: 0 8px 8px 0;
}

.abstract.expanded {
    max-height: 500px;
}

.abstract-toggle {
    background: var(--gradient-bg);
    color: white;
    cursor: pointer;
    display: inline-block;
    padding: 4px 12px;
    border-radius: 30px;
    font-size: 13px;
    font-weight: 500;
    transition: all var(--transition-speed);
    box-shadow: 0 3px 8px rgba(52, 152, 219, 0.3);
}

.abstract-toggle:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 12px rgba(52, 152, 219, 0.4);
}

/* 论文信息 */
.paper-info {
    display: flex;
    justify-content: space-between;
    margin-top: 20px;
    padding-top: 15px;
    border-top: 1px solid #eee;
    color: var(--gray-color);
    font-size: 13px;
}

.paper-info i {
    margin-right: 5px;
    color: var(--primary-color);
}

/* 进度阅读滚动条 */
.progress-container {
    position: fixed;
    top: 0;
    width: 100%;
    height: 4px;
    z-index: 1001;
}

.progress-bar {
    height: 4px;
    background: var(--gradient-bg);
    width: 0%;
    box-shadow: 0 0 10px rgba(52, 152, 219, 0.5);
}

/* 回到顶部按钮 */
.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--gradient-bg);
    color: white;
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-speed);
    box-shadow: 0 3px 15px rgba(52, 152, 219, 0.3);
    z-index: 1000;
}

.scroll-top.active {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(52, 152, 219, 0.5);
}

/* 论文分类标签 */
.paper-tag {
    display: inline-block;
    padding: 3px 10px;
    background: rgba(46, 204, 113, 0.1);
    color: var(--secondary-color);
    border-radius: 30px;
    font-size: 12px;
    font-weight: 500;
    margin-right: 5px;
    margin-bottom: 5px;
}

/* 响应式布局调整 */
@media (max-width: 992px) {
    /* 平板设备调整 */
    .paper-card .col-md-4 {
        height: 220px; /* 减小图片容器高度 */
    }
    
    .main-navigation .menu-item a {
        min-width: 70px;
    }
    
    /* 改进筛选控件布局 */
    .filter-controls .row {
        gap: 10px;
    }
    
    .filter-controls .col-md-5,
    .filter-controls .col-md-2 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .filter-controls .form-select,
    .filter-controls .btn {
        width: 100%;
        margin-bottom: 10px;
    }
    
    /* 浮动标签在平板上仍可见 */
    .floating-tags {
        padding: 10px;
        gap: 8px;
    }
    
    .floating-tags .tag-item {
        padding: 6px 10px;
        font-size: 12px;
    }
}

@media (max-width: 768px) {
    /* 移动设备调整 */
    .page-title {
        font-size: 36px;
    }
    
    .paper-card .col-md-4 {
        height: 200px;
    }
    
    .card-title {
        font-size: 16px;
    }
    
    .main-navigation .menu-item a {
        min-width: auto;
        text-align: left;
    }
    
    /* 改进论文卡片在移动端的布局 */
    .paper-card .row {
        flex-direction: column;
    }
    
    .paper-card .col-md-4,
    .paper-card .col-md-8 {
        flex: 0 0 100%;
        max-width: 100%;
    }
    
    .paper-image-container {
        height: 200px !important;
        border-radius: 10px 10px 0 0;
    }
    
    /* 调整摘要展开按钮样式 */
    .abstract-toggle {
        margin-top: 5px;
        display: inline-block;
    }
    
    /* 浮动标签在移动端显示为水平滚动列表 */
    .floating-tags {
        display: flex !important;
        position: sticky;
        top: 70px;
        left: 0;
        width: 100%;
        flex-direction: row;
        overflow-x: auto;
        white-space: nowrap;
        background: white;
        box-shadow: 0 2px 10px rgba(0,0,0,0.1);
        z-index: 100;
        padding: 10px;
        gap: 5px;
        margin-bottom: 20px;
        border-radius: 0;
    }
    
    .floating-tags .tag-item {
        flex-shrink: 0;
        margin-bottom: 0;
    }
    
    /* 隐藏滚动条但保持功能 */
    .floating-tags::-webkit-scrollbar {
        height: 0;
        width: 0;
        background: transparent;
    }
}

@media (max-width: 576px) {
    /* 小屏幕手机调整 */
    .page-title {
        font-size: 28px;
    }
    
    .paper-image-container {
        height: 180px !important;
    }
    
    .paper-card {
        margin-bottom: 15px;
    }
    
    .card-body {
        padding: 15px;
    }
    
    .abstract {
        max-height: 80px;
        font-size: 13px;
    }
    
    .paper-info {
        flex-direction: column;
        align-items: flex-start;
        gap: 5px;
    }
    
    .paper-tag {
        margin-right: 5px;
        font-size: 11px;
        padding: 3px 8px;
    }
    
    /* 调整过滤控件 */
    .filter-controls {
        padding: 10px;
        margin-bottom: 15px;
    }
}

/* 超小屏幕设备适配 */
@media (max-width: 375px) {
    .page-title {
        font-size: 24px;
    }
    
    .paper-image-container {
        height: 160px !important;
    }
    
    .card-title {
        font-size: 15px;
    }
    
    .card-text,
    .abstract {
        font-size: 12px;
    }
    
    .floating-tags .tag-item {
        padding: 4px 8px;
        font-size: 11px;
    }
}

/* 过滤和排序控件 */
.filter-controls {
    margin-bottom: 40px;
    padding: 20px;
    background: white;
    border-radius: 15px;
    box-shadow: var(--box-shadow);
    text-align: center;
}

.filter-controls .form-select {
    border-radius: 30px;
    padding: 10px 15px;
    border: 1px solid #eee;
    box-shadow: none;
    margin-bottom: 10px;
}

.filter-controls .btn {
    background: var(--gradient-bg);
    border: none;
    border-radius: 30px;
    padding: 10px 20px;
    color: white;
    font-weight: 500;
    box-shadow: 0 3px 10px rgba(52, 152, 219, 0.3);
    transition: all var(--transition-speed);
}

.filter-controls .btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

.filter-controls .form-control {
    border-radius: 30px;
    padding: 10px 20px;
    border: 1px solid #eee;
    box-shadow: none;
}

.filter-controls .row {
    align-items: center;
}

/* 筛选控件样式优化 */
.filter-controls .form-select {
    box-shadow: 0 3px 10px rgba(52, 152, 219, 0.1);
    transition: all 0.3s ease;
}

.filter-controls .form-select:focus {
    box-shadow: 0 3px 15px rgba(52, 152, 219, 0.25);
    border-color: var(--primary-color);
}

/* 文字渐变效果 */
.gradient-text {
    background: var(--gradient-bg);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 700;
}

.paper-image-container {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 200px;
    overflow: hidden;
}

.paper-image-container img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s ease;
}

.paper-card:hover .paper-image-container img {
    transform: scale(1.1);
}

.overlay-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, rgba(0,0,0,0.3), transparent);
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.paper-card:hover .overlay-gradient {
    opacity: 0.4;
}

/* 论文数量统计 */
.paper-stats {
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark-color);
}

.paper-stats .count {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
}

.paper-stats .text {
    font-size: 18px;
}

/* 无搜索结果提示 */
.no-results {
    display: none;
    text-align: center;
    padding: 50px 0;
    color: var(--gray-color);
}

.no-results i {
    font-size: 48px;
    margin-bottom: 20px;
    color: var(--primary-color);
    opacity: 0.5;
}

.no-results h3 {
    font-size: 24px;
    margin-bottom: 10px;
}

/* 浮动分类标签 */
.floating-tags {
    position: fixed;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    background: white;
    padding: 15px;
    border-radius: 10px;
    box-shadow: var(--box-shadow);
    display: flex;
    flex-direction: column;
    gap: 10px;
    z-index: 999;
    transition: all var(--transition-speed);
    margin-top: 120px;
}

.floating-tags .tag-item {
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.3s;
    border: 1px solid #eee;
}

.floating-tags .tag-item:hover,
.floating-tags .tag-item.active {
    background: var(--gradient-bg);
    color: white;
    box-shadow: 0 3px 8px rgba(52, 152, 219, 0.3);
}

.floating-tags .tag-item i {
    margin-right: 5px;
}

/* 在移动端和平板设备上隐藏浮动标签 */
@media (max-width: 1200px) {
    .floating-tags {
        display: none !important;
    }
}

/* 更严格的移动端隐藏规则 */
@media (max-width: 992px) {
    .floating-tags {
        display: none !important;
        visibility: hidden !important;
        opacity: 0 !important;
        pointer-events: none !important;
    }
}

@media (max-width: 768px) {
    .floating-tags {
        display: none !important;
        visibility: hidden !important;
        opacity: 0 !important;
        pointer-events: none !important;
        position: absolute !important;
        left: -9999px !important;
    }
}

/* 导航菜单包装器样式 */
.main-navigation > div {
    width: 100%;
    display: flex;
    justify-content: flex-end;
    padding-right: 10px;
    margin-right: 0;
}

/* 菜单切换按钮 */
.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--dark-color);
    font-size: 1.5rem; /* 24px */
    cursor: pointer;
    padding: 0.5rem; /* 8px */
    transition: all 0.3s ease;
    z-index: 1001;
    border-radius: 0.25rem; /* 4px */
    position: relative;
    width: 2.5rem; /* 40px */
    height: 2.5rem; /* 40px */
    display: flex;
    align-items: center;
    justify-content: center;
}

.menu-toggle:hover {
    color: var(--primary-color);
    background-color: rgba(52, 152, 219, 0.1);
    transform: scale(1.05);
}

.menu-toggle:focus {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

.menu-toggle:active {
    transform: scale(0.95);
}

/* 汉堡菜单图标动画 */
.menu-toggle .fa-bars {
    transition: transform 0.3s ease;
}

.menu-toggle.active .fa-bars {
    transform: rotate(90deg);
}

/* 移动端菜单 - 颠覆性优化 */
.mobile-navigation {
    display: none;
    position: fixed; /* 相对于视口定位，完全脱离导航栏约束 */
    top: 0; /* 初始位置，会通过JavaScript动态调整 */
    left: 0;
    right: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(10px);
    box-shadow: 0 0.5rem 1.5rem rgba(0, 0, 0, 0.15);
    z-index: 999; /* 降低层级，确保不覆盖导航栏 */
    border-radius: 0 0 1rem 1rem;
    transform: translateY(-100%); /* 初始隐藏在顶部 */
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    border-top: 2px solid var(--primary-color);
    /* 自适应高度，确保所有菜单项都可见 */
    height: auto;
    min-height: auto;
    max-height: calc(100vh - 100px); /* 留出导航栏空间 */
    overflow-y: auto;
    padding-bottom: 1rem;
    /* 不使用padding-top，而是通过JavaScript动态设置top位置 */
    padding-left: 0;
    padding-right: 0;
}

.mobile-navigation.show {
    display: block;
    transform: translateY(0); /* 滑入到导航栏下方的正确位置 */
    opacity: 1;
}

.mobile-navigation .menu {
    display: flex;
    flex-direction: column;
    padding: 1rem 0; /* 适中的垂直内边距 */
    margin: 0;
    list-style: none;
    gap: 0.25rem; /* 菜单项之间的小间距 */
    /* 添加水平容器边距，与页面内容保持一致 */
    max-width: 100%;
    padding-left: 1.25rem; /* 与branding的margin-left保持一致 */
    padding-right: 1.25rem;
}

.mobile-navigation .menu-item {
    margin: 0;
    width: 100%;
    opacity: 0;
    transform: translateY(-10px); /* 轻微的向上位移 */
    animation: slideInDown 0.3s ease forwards; /* 缩短动画时间 */
    overflow: visible;
    flex-shrink: 0;
}

.mobile-navigation .menu-item:nth-child(1) { animation-delay: 0.05s; }
.mobile-navigation .menu-item:nth-child(2) { animation-delay: 0.1s; }
.mobile-navigation .menu-item:nth-child(3) { animation-delay: 0.15s; }
.mobile-navigation .menu-item:nth-child(4) { animation-delay: 0.2s; }
.mobile-navigation .menu-item:nth-child(5) { animation-delay: 0.25s; }

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

.mobile-navigation .menu-item a {
    padding: 0.875rem 1rem;
    color: var(--dark-color);
    font-weight: 500;
    text-decoration: none;
    display: flex;
    align-items: center;
    border-radius: 0.5rem;
    border-left: 0.25rem solid transparent;
    transition: all 0.3s ease;
    position: relative;
    font-size: 1rem;
    min-height: 3rem;
    white-space: nowrap;
    background: transparent;
    margin: 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.mobile-navigation .menu-item:last-child a {
    border-bottom: none;
}

.mobile-navigation .menu-item a:hover,
.mobile-navigation .menu-item a:focus,
.mobile-navigation .current-menu-item a {
    border-left: 0.25rem solid var(--primary-color);
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.1), rgba(46, 204, 113, 0.05));
    color: var(--primary-color);
    transform: translateX(5px);
    box-shadow: 0 2px 10px rgba(52, 152, 219, 0.15);
}

.mobile-navigation .menu-item a:active {
    background: linear-gradient(135deg, rgba(52, 152, 219, 0.15), rgba(46, 204, 113, 0.1));
    transform: scale(0.98) translateX(5px);
}

/* 为移动端菜单项添加图标 */
.mobile-navigation .menu-item a::before {
    content: '';
    width: 0.5rem;
    height: 0.5rem;
    border-radius: 50%;
    background-color: var(--gray-color);
    margin-right: 0.75rem;
    transition: all 0.3s ease;
    flex-shrink: 0;
}

.mobile-navigation .menu-item a:hover::before,
.mobile-navigation .menu-item a:focus::before,
.mobile-navigation .current-menu-item a::before {
    background-color: var(--primary-color);
    transform: scale(1.2);
    box-shadow: 0 0 8px rgba(52, 152, 219, 0.4);
}

/* 移动端导航打开时禁止页面滚动 */
body.mobile-nav-open {
    overflow: hidden;
    position: fixed;
    width: 100%;
}

/* 屏幕阅读器专用文本 */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* 响应式媒体查询优化 - 下拉菜单适配 */
@media (max-width: 990px) {
    .menu-toggle {
        display: flex !important;
        margin-right: 1rem;
    }
    
    .main-navigation .menu {
        display: none !important;
    }
    
    .mobile-navigation {
        max-height: calc(100vh - 100px); /* 调整最大高度 */
    }
    
    .mobile-navigation .menu {
        padding-left: 1rem; /* 减少容器边距 */
        padding-right: 1rem;
    }
    
    .mobile-navigation .menu-item a {
        padding: 0.75rem 0.875rem; /* 调整内边距 */
        font-size: 0.9375rem; /* 15px */
        min-height: 2.75rem;
    }
    
    .mobile-navigation .menu-item a::before {
        width: 0.4375rem; /* 7px */
        height: 0.4375rem;
        margin-right: 0.625rem; /* 10px */
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex !important;
        margin-right: 1rem;
    }
    
    .main-navigation .menu {
        display: none !important;
    }
    
    .mobile-navigation {
        max-height: calc(100vh - 90px);
    }
    
    .mobile-navigation .menu {
        padding: 1rem 0;
        padding-left: 0.875rem; /* 进一步减少容器边距 */
        padding-right: 0.875rem;
    }
    
    .mobile-navigation .menu-item a {
        padding: 0.6875rem 0.8125rem; /* 调整内边距 */
        font-size: 0.9rem; /* 14.4px */
        min-height: 2.625rem;
    }
    
    .mobile-navigation .menu-item a::before {
        width: 0.4rem; /* 6.4px */
        height: 0.4rem;
        margin-right: 0.5625rem; /* 9px */
    }
}

@media (max-width: 576px) {
    .mobile-navigation {
        max-height: calc(100vh - 90px);
    }
    
    .mobile-navigation .menu {
        padding: 0.75rem 0;
        padding-left: 0.75rem; /* 进一步减少容器边距 */
        padding-right: 0.75rem;
    }
    
    .mobile-navigation .menu-item a {
        padding: 0.625rem 0.75rem; /* 调整内边距 */
        font-size: 0.875rem; /* 14px */
        min-height: 2.5rem;
    }
    
    .mobile-navigation .menu-item a::before {
        width: 0.375rem; /* 6px */
        height: 0.375rem;
        margin-right: 0.5rem; /* 8px */
    }
}