body, html {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica Neue', 'Hiragino Sans GB', 'WenQuanYi Micro Hei', 'Microsoft Yahei', sans-serif, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans';
    color: #333;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

/* 顶部导航菜单样式 - 简洁红色主题 */
.top-navbar {
    background-color: #ffffff;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    z-index: 1001;
    height: 60px;
}

.top-nav {
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    margin: 0;
    padding: 0;
}

.nav-brand {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding-left: 20px;
}

.nav-title-line {
    width: 100%;
    display: block;
}

.nav-site-name {
    font-size: 30px;
    font-weight: 600;
    color: rgb(255, 83, 103);
    margin: 0;
    line-height: 1.2;
    display: inline;
}

.nav-slogan {
    font-size: 15px;
    color: #595959;
    font-weight: normal;
    display: inline;
}

.nav-menu {
    list-style: none;
    display: flex;
    margin: 0;
    padding: 0;
    align-items: center;
    gap: 25px;
    margin-right: 90px;
}

.nav-menu li {
    position: relative;
}

.nav-menu a {
    text-decoration: none;
    color: #333;
    font-size: 14px;
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.3s ease;
    display: block;
}

.nav-menu a:hover {
    background-color: #fff0f2;
    color: rgb(255, 83, 103);
}

/* 下拉菜单样式 */
.dropdown {
    position: relative;
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    background-color: #ffffff;
    box-shadow: 0 8px 16px rgba(0, 0, 0, 0.15);
    border-radius: 8px;
    padding: 15px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 1002;
    margin-top: 8px;
}

.dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
}

.qr-code {
    width: 150px;
    height: 150px;
    object-fit: contain;
    border-radius: 6px;
}



.main-container {
    display: flex;
    min-height: 100vh;
    margin-top: 60px;
}

.sidebar {
    width: 220px;
    flex-shrink: 0;
    background-color: #ffffff;
    position: fixed;
    top: 60px;
    bottom: 0;
    left: 0;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: transform 0.3s ease-in-out;
}

.menu-toggle {
    display: none;
}

.sidebar ul {
    list-style: none;
    padding: 0 20px 10px;
    margin: 0;
}

.sidebar ul li a {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 15px;
    margin: 4px 0;
    border-radius: 6px;
    font-size: 15px;
    color: #434343;
    transition: all 0.2s ease;
    text-decoration: none;
}

.sidebar ul li a.active,
.sidebar ul li a:hover {
    background-color: #fff0f2;
    color: rgb(255, 83, 103);
    transform: scale(1.03);
}

@keyframes flash-underline {
    0% {
        transform: scaleX(0);
        transform-origin: left;
    }
    50% {
        transform: scaleX(1);
        transform-origin: left;
    }
    51% {
        transform-origin: right;
    }
    100% {
        transform: scaleX(0);
        transform-origin: right;
    }
}

.hot-badge, .new-badge {
    font-size: 10px;
    padding: 3px 8px;
    border-radius: 12px;
    font-weight: 500;
    margin-left: 8px;
    color: #ffffff;
}

.hot-badge {
    background-color: rgb(255, 83, 103);
}

.new-badge {
    background-color: rgb(255, 83, 103);
}

.sidebar li a.active .hot-badge,
.sidebar li a.active .new-badge {
    background-color: #fff;
    color: rgb(255, 83, 103);
}

.content {
    flex-grow: 1;
    padding: 30px;
    background-color: rgb(255, 237, 240);
    min-height: calc(100vh - 60px);
    margin-left: 220px;
    transition: margin-left 0.3s ease-in-out;
}

.category-section {
    margin-bottom: 40px;
    background-color: #ffffff;
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.category-title {
    font-size: 22px;
    margin-bottom: 25px;
    padding-bottom: 10px;
    border-bottom: 1px solid #f0f0f0;
    display: flex;
    align-items: center;
    color: #333;
    position: relative;
}

.category-title .hot-badge,
.category-title .new-badge {
    margin-left: 12px;
    font-size: 12px;
}

.category-title.highlight-flash::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: rgb(255, 83, 103);
    animation: flash-underline 0.4s ease-out;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

.tool-card {
    background-color: #fff;
    padding: 20px;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.04);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    border-color: rgb(255, 83, 103);
}

.tool-card .name {
    font-size: 16px;
    font-weight: 600;
    color: rgb(255, 83, 103);
    margin: 0 0 8px;
}

.tool-card .description {
    font-size: 14px;
    color: #666;
    line-height: 1.5;
    margin: 0;
    flex-grow: 1;
}

.website-url {
    font-size: 12px;
    color: #999;
    margin: 8px 0 0;
    word-break: break-all;
}

.footer {
    background-color: #fff;
    text-align: center;
    padding: 20px;
    font-size: 14px;
    color: #8c8c8c;
    border-top: 1px solid #f0f0f0;
    margin-left: 220px;
    transition: margin-left 0.3s ease-in-out;
}

@media (max-width: 768px) {
    /* 移动端顶部导航菜单 */
    .top-nav {
        padding: 0 10px;
        flex-direction: column;
        justify-content: center;
        gap: 10px;
    }
    
    .nav-brand {
        text-align: left;
        align-items: flex-start;
        padding-left: 20px;
    }
    
    .nav-site-name {
        font-size: 22px;
    }
    
    .nav-slogan {
        font-size: 12px;
    }
    
    .nav-menu {
        gap: 15px;
        margin-right: 20px;
    }
    
    .nav-menu a {
        font-size: 13px;
        padding: 6px 12px;
    }
    
    .qr-code {
        width: 120px;
        height: 120px;
    }

    .sidebar {
        position: static;
        width: 100%;
        height: auto;
        box-shadow: none;
        border-bottom: 1px solid #f0f0f0;
        top: auto;
    }

    .main-container {
        flex-direction: column;
    }
    
    .sidebar ul {
        display: flex;
        flex-wrap: wrap;
        justify-content: center;
        padding: 10px;
    }
    
    .sidebar ul li a {
        margin: 5px;
    }

    .content {
        margin-left: 0;
        padding: 20px 15px;
    }
    
    .footer {
        margin-left: 0;
    }

    .tool-grid {
        grid-template-columns: 1fr;
    }
}