/* 响应式设计 */

/* 大屏幕 (>= 1200px) */
@media (min-width: 1200px) {
    .container {
        max-width: 1140px;
    }
    
    .modules-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .tools-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

/* 中等屏幕 (>= 992px) 且 (< 1200px) */
@media (min-width: 992px) and (max-width: 1199px) {
    .container {
        max-width: 960px;
    }
    
    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .nav-list {
        gap: 15px;
    }
    
    .nav-list li a {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
}

/* 小屏幕 (>= 768px) 且 (< 992px) */
@media (min-width: 768px) and (max-width: 991px) {
    .container {
        max-width: 720px;
    }
    
    .header-content {
        flex-wrap: wrap;
        gap: 15px;
    }
    
    .logo {
        flex: 1;
    }
    
    .nav {
        order: 3;
        width: 100%;
    }
    
    .nav-list {
        justify-content: center;
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .nav-list li a {
        padding: 6px 12px;
        font-size: 0.9rem;
    }
    
    .header-actions {
        flex: 1;
        justify-content: flex-end;
    }
    
    .modules-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .hero-content h2 {
        font-size: 2rem;
    }
    
    .hero-content p {
        font-size: 1rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .progress-content {
        flex-direction: column;
        align-items: stretch;
    }
    
    .progress-card {
        width: 100%;
        min-width: unset;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }
}

/* 超小屏幕 (< 768px) */
@media (max-width: 767px) {
    .container {
        max-width: 100%;
        padding: 0 15px;
    }
    
    /* 隐藏桌面导航 */
    .nav {
        display: none;
    }
    
    /* 显示移动端菜单按钮 */
    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        font-size: 1.5rem;
        color: var(--text-color);
        cursor: pointer;
        padding: 10px;
    }
    
    .header-content {
        justify-content: space-between;
    }
    
    .logo h1 {
        font-size: 1.2rem;
    }
    
    .logo p {
        font-size: 0.8rem;
    }
    
    .hero {
        padding: 60px 0;
    }
    
    .hero-content h2 {
        font-size: 1.8rem;
        text-align: center;
    }
    
    .hero-content p {
        font-size: 0.95rem;
        text-align: center;
        padding: 0 10px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 15px;
    }
    
    .btn {
        width: 100%;
        max-width: 200px;
    }
    
    .modules {
        padding: 60px 0;
    }
    
    .modules h3 {
        font-size: 1.5rem;
        margin-bottom: 30px;
        text-align: center;
    }
    
    .modules-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .module-card {
        padding: 20px;
    }
    
    .module-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
    }
    
    .module-card h4 {
        font-size: 1.1rem;
    }
    
    .tools {
        padding: 60px 0;
    }
    
    .tools h3 {
        font-size: 1.5rem;
        margin-bottom: 30px;
        text-align: center;
    }
    
    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .tool-card {
        padding: 20px;
    }
    
    .tool-card i {
        font-size: 2rem;
    }
    
    .tool-card h4 {
        font-size: 1rem;
    }
    
    .progress-section {
        padding: 60px 0;
    }
    
    .progress-section h3 {
        font-size: 1.5rem;
        margin-bottom: 30px;
        text-align: center;
    }
    
    .progress-content {
        flex-direction: column;
        align-items: stretch;
    }
    
    .progress-card {
        width: 100%;
        min-width: unset;
        padding: 20px;
    }
    
    .footer {
        padding: 40px 0 20px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-info h3 {
        font-size: 1.3rem;
    }
    
    .footer-bottom {
        font-size: 0.8rem;
        text-align: center;
    }
}

/* 极小屏幕 (< 480px) */
@media (max-width: 479px) {
    .logo h1 {
        font-size: 1.1rem;
    }
    
    .header-actions {
        gap: 10px;
    }
    
    .theme-toggle,
    .user-btn {
        padding: 8px;
        font-size: 1rem;
    }
    
    .hero-content h2 {
        font-size: 1.6rem;
    }
    
    .hero-content p {
        font-size: 0.9rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .module-card,
    .tool-card {
        padding: 15px;
    }
    
    .module-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .footer-content {
        gap: 20px;
    }
    
    .footer-info p,
    .footer-contact p {
        font-size: 0.9rem;
    }
}

/* 横屏模式调整 */
@media (orientation: landscape) and (max-height: 500px) {
    .hero {
        padding: 40px 0;
    }
    
    .modules,
    .tools,
    .progress-section {
        padding: 40px 0;
    }
    
    .module-card,
    .tool-card {
        padding: 20px;
    }
}

/* 打印样式 */
@media print {
    body {
        background: white;
        color: black;
        font-size: 12pt;
    }
    
    .header,
    .footer,
    .mobile-nav,
    .header-actions {
        display: none;
    }
    
    .container {
        max-width: 100%;
        padding: 0;
    }
    
    .module-card,
    .tool-card,
    .progress-card {
        box-shadow: none;
        border: 1px solid #ccc;
        break-inside: avoid;
    }
    
    a {
        color: black;
        text-decoration: underline;
    }
}