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

html, body {
    height: 100%;
}

body {
    font-family: 'Microsoft YaHei', sans-serif;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: #333;
    color: white;
    padding: 1rem;
}

nav, .logo, nav ul, nav ul li, nav ul li a {
    all: unset;
}

/* 修改导航栏相关样式 */
.navbar {
    background-color: #0d6efd;
    padding: 0;
    height: 48px;
    width: 100%;
}

.container-fluid {
    padding: 0;
    width: 100%;
    max-width: 100%;
    margin: 0;
}

.navbar-left {
    display: flex;
    align-items: center;
    width: 100%;
    padding: 0 16px;
}

.navbar-brand {
    color: white !important;
    padding: 0 1rem;
    margin: 0;
    height: 48px;
    display: flex;
    align-items: center;
    text-decoration: none;
}

.navbar-brand:hover {
    color: white;
}

.navbar-nav {
    display: flex;
    flex-direction: row;
    margin: 0;
    height: 48px;
}

.nav-link {
    color: white !important;
    padding: 0 1rem;
    height: 48px;
    display: flex;
    align-items: center;
    opacity: 0.8;
    text-decoration: none;
}

.nav-link:hover {
    opacity: 1;
}

.nav-link i {
    margin-right: 0.3rem;
}

main {
    flex: 1;
    padding-bottom: 30px; /* 内容底部内边距 */
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 1rem;
    width: 100%;
    flex-shrink: 0; /* 防止页脚被压缩 */
    margin-top: auto; /* 确保页脚在底部 */
}

.card {
    transition: transform 0.2s;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
}

.navbar-brand i,
.card-title i {
    margin-right: 0.5rem;
}

.nav-link i {
    margin-right: 0.3rem;
}

/* 添加图片相关样式 */
.img-fluid {
    max-width: 100%;
    height: auto;
    transition: transform 0.3s ease;
}

.img-fluid:hover {
    transform: scale(1.02);
}

/* 添加移动端导航栏样式 */
.navbar-toggler {
    display: none;
    border: none;
    padding: 0.5rem;
    margin-left: auto;
}

.navbar-toggler:focus {
    box-shadow: none;
}

.navbar-toggler-icon {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 30 30'%3e%3cpath stroke='rgba(255, 255, 255, 1)' stroke-linecap='round' stroke-miterlimit='10' stroke-width='2' d='M4 7h22M4 15h22M4 23h22'/%3e%3c/svg%3e");
}

@media (max-width: 768px) {
    .navbar-toggler {
        display: block;
    }

    .navbar-nav {
        display: none;
        position: absolute;
        top: 48px;
        left: 0;
        width: 100%;
        background-color: #0d6efd;
        flex-direction: column;
        height: auto;
        padding: 0.5rem 0;
    }

    .navbar-nav.show {
        display: flex;
    }

    .nav-link {
        padding: 0.75rem 1rem;
        height: auto;
    }

    .container-fluid {
        padding: 0 1rem;
    }
}

/* 添加移动端主页样式 */
@media (max-width: 768px) {
    .row-cols-md-3 {
        grid-template-columns: 1fr;
    }

    .p-5 {
        padding: 1.5rem !important;
    }

    .display-5 {
        font-size: 2rem;
    }

    .fs-4 {
        font-size: 1rem !important;
    }

    .img-fluid {
        margin-top: 1rem;
    }
} 

/* 在原有样式基础上添加以下优化 */

/* 优化导航栏 */
.navbar {
    background-color: #0d6efd;
    padding: 0;
    height: 50px;
    box-shadow: 0 1px 5px rgba(0,0,0,0.1);
}

.navbar-brand {
    font-weight: 600;
    font-size: 1.2rem;
}

.nav-link {
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0 0.8rem;
}

/* 优化卡片样式 */
.card {
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid #eee;
    box-shadow: 0 3px 8px rgba(0,0,0,0.03);
}

.card-body {
    padding: 1.2rem;
}

.card-title {
    font-size: 1.05rem;
    margin-bottom: 0.6rem;
}

.card-text {
    font-size: 0.85rem;
    margin-bottom: 1rem;
    color: #666;
}

/* 优化按钮样式 */
.btn {
    border-radius: 6px;
    font-weight: 500;
    padding: 0.25rem 0.8rem;
    font-size: 0.85rem;
}

.btn-primary {
    background-color: #0d6efd;
    border-color: #0d6efd;
}

.btn-primary:hover {
    background-color: #0b5ed7;
    border-color: #0b5ed7;
}

.btn-light {
    background-color: rgba(255,255,255,0.9);
}

/* 优化页脚 */
footer {
    background: #333;
    padding: 16px 0 !important; /* 增加垂直内边距 */
}

/* 响应式优化 */
@media (max-width: 768px) {
    .hero-section {
        padding: 1.5rem 1rem !important;
    }
    
    .hero-section h1 {
        font-size: 1.3rem;
    }
    
    .hero-section p {
        font-size: 0.9rem;
    }
    
    .section-title {
        font-size: 1.3rem;
    }
    
    .tool-icon {
        font-size: 1.8rem;
    }
    
    /* 移动端增加更多底部空间 */
    main {
        padding-bottom: 40px !important;
    }
}

/* 为工具栏最后一行添加额外间距 */
#tools .row {
    margin-bottom: 15px;
}

/* 确保卡片之间有足够间距 */
#tools .col {
    margin-bottom: 15px;
}