.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 86px;
    background-color: #fff;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    margin-right: 10px;
}

.logo-text h1 {
    font-size: 24px;
    font-weight: 700;
    color: #333;
    margin: 0;
}

.logo-text p {
    font-size: 14px;
    font-weight: 700;
    color: #333;
}

.main-nav ul {
    display: flex;
    gap: 30px;
    margin: 0;
    padding: 0;
    list-style: none;
}

.main-nav li a {
    font-size: 16px;
    color: #696969;
    font-weight: 400;
    transition: all 0.3s ease;
    text-decoration: none;
    display: block;
    padding: 10px 0;
}

.main-nav li.active a {
    color: #0C0C0C;
    font-weight: 700;
}

.main-nav li a:hover {
    color: #1F79FF;
}

.header-btn .btn-primary {
    padding: 10px 25px;
}

/* 移动菜单按钮 */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    z-index: 1001;
    background: transparent;
    border: none;
    padding: 0;
}

.mobile-menu-toggle span {
    height: 3px;
    width: 100%;
    background-color: #333;
    border-radius: 3px;
    transition: all 0.3s ease;
    display: block;
}

/* 菜单按钮活动状态 */
.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 6px);
}

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

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -6px);
}


.header.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    height: 70px;
}

.header.scrolled .logo img {
    height: 40px;
}

.header.scrolled .logo-text h1 {
    font-size: 20px;
}

.header.scrolled .logo-text p {
    font-size: 12px;
}


@media (max-width: 1024px) {
    .main-nav ul {
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .main-nav {
        display: none;
        position: fixed;
        top: 86px;
        left: 0;
        width: 100%;
        height: calc(100vh - 86px);
        background-color: #fff;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
        z-index: 1000;
        overflow-y: auto;
    }
    
    .main-nav.active {
        display: block;
    }
    
    .main-nav ul {
        flex-direction: column;
        gap: 0;
        padding: 0;
        margin: 0;
    }
    
    .main-nav li {
        padding: 0;
        margin: 0;
        border-bottom: 1px solid #eee;
        list-style: none;
    }
    
    .main-nav li a {
        display: block;
        width: 100%;
        padding: 15px 20px;
        font-size: 16px;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .header-btn {
        margin-right: 20px;
    }
}