/* 中等屏幕 (平板) */
@media (max-width: 992px) {
    .container {
        padding: 0 15px;
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }
    
    .navbar-container {
        padding: 0 15px;
    }
    
    .nav-links {
        gap: 15px;
    }
}

/*链接样式*/
a {
text-decoration: none; 
color: inherit; 
font-weight: inherit; 
font-style: inherit; 
}

/* 小屏幕 (大手机) */
@media (max-width: 768px) {
    .navbar-menu {
        position: fixed;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: rgba(255, 255, 255, 0.98);
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        padding: 20px;
        transform: translateY(-150%);
        transition: transform 0.3s ease;
        z-index: 999;
        backdrop-filter: blur(10px);
        -webkit-backdrop-filter: blur(10px);
    }
    
    .navbar-menu.active {
        transform: translateY(0);
    }
    
    .nav-links {
        flex-direction: column;
        gap: 15px;
    }
    
    .nav-item a {
        padding: 10px;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .tagline {
        display: none;
    }
    
    .main-content {
        margin-top: 80px;
    }
    
    .auth-card {
        padding: 30px 20px;
    }
}

/* 超小屏幕 (手机) */
@media (max-width: 576px) {
    .container {
        padding: 0 10px;
    }
    
    .brand-name {
        font-size: 1.2rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .announcement-card, .changelog-list {
        padding: 20px 15px;
    }
    
    .search-container {
        margin-bottom: 30px;
    }
    
    .search-input {
        padding: 12px 20px;
        padding-right: 50px;
    }
    
    .search-btn {
        width: 45px;
        height: 45px;
    }
    
    .category-tabs {
        gap: 8px;
    }
    
    .category-tab {
        padding: 8px 15px;
        font-size: 0.85rem;
    }
    
    .footer-links {
        gap: 15px;
    }
    
    .footer-social {
        gap: 10px;
    }
    
    .social-icon {
        width: 32px;
        height: 32px;
        font-size: 0.9rem;
    }
    
    .modal-container {
        padding: 10px;
    }
    
    .modal-content {
        padding: 20px;
    }
}

/* 超小高度设备 */
@media (max-height: 600px) {
    .auth-section {
        padding: 20px 0;
    }
    
    .auth-card {
        padding: 25px 20px;
    }
    
    .auth-header {
        margin-bottom: 20px;
    }
    
    .auth-logo {
        width: 50px;
        height: 50px;
        margin-bottom: 10px;
    }
    
    .auth-header h2 {
        font-size: 1.5rem;
    }
    
    .auth-form .form-group {
        margin-bottom: 15px;
    }
    
    .auth-form input {
        padding: 12px 15px;
    }
    
    .auth-btn {
        padding: 12px;
        margin-bottom: 15px;
    }
}