/* 响应式设计 */

/* 平板设备 */
@media screen and (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: #fff;
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0,0,0,0.05);
        padding: 20px 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-menu a {
        padding: 15px;
        display: block;
        border-bottom: 1px solid #eee;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active .bar:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active .bar:nth-child(1) {
        transform: translateY(8px) rotate(45deg);
    }

    .nav-toggle.active .bar:nth-child(3) {
        transform: translateY(-8px) rotate(-45deg);
    }

    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }

    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        justify-content: center;
        flex-wrap: wrap;
    }

    .section-title {
        font-size: 2rem;
    }

    .news-grid,
    .activities-grid {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
    }

    .stat-number {
        font-size: 2.5rem;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
}

/* 手机设备 */
@media screen and (max-width: 480px) {
    .container {
        padding: 0 15px;
    }

    .nav-container {
        padding: 0 15px;
    }

    .logo-text {
        font-size: 16px;
    }

    .hero {
        padding: 60px 0;
        min-height: 500px;
    }

    .hero-content {
        padding: 0 15px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }

    .btn {
        padding: 10px 25px;
        font-size: 0.9rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .section-title {
        font-size: 1.8rem;
        margin-bottom: 30px;
    }

    .news-section,
    .activities-preview {
        padding: 60px 0;
    }

    .stats-section {
        padding: 60px 0;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }

    .stat-number {
        font-size: 2rem;
    }

    .news-card-content,
    .activity-card-content {
        padding: 20px;
    }

    .news-card h3,
    .activity-card h3 {
        font-size: 1.2rem;
    }

    .footer {
        padding: 40px 0 15px;
    }

    .footer-content {
        gap: 30px;
    }

    .social-links {
        justify-content: center;
    }
}

/* 超小屏幕 */
@media screen and (max-width: 320px) {
    .hero-content h1 {
        font-size: 1.8rem;
    }

    .section-title {
        font-size: 1.6rem;
    }

    .news-grid,
    .activities-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .btn {
        padding: 8px 20px;
        font-size: 0.85rem;
    }
}

/* 大屏幕优化 */
@media screen and (min-width: 1400px) {
    .container,
    .nav-container {
        max-width: 1400px;
    }

    .hero-content {
        max-width: 1400px;
    }

    .hero-content h1 {
        font-size: 3.5rem;
    }

    .section-title {
        font-size: 3rem;
    }
}

/* 横屏手机 */
@media screen and (max-height: 500px) and (orientation: landscape) {
    .hero {
        min-height: 400px;
        padding: 40px 0;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-content p {
        font-size: 1rem;
    }
}

/* 打印样式 */
@media print {
    .navbar,
    .hero-buttons,
    .footer {
        display: none;
    }

    .hero {
        margin-top: 0;
        background: none;
        color: #333;
    }

    body {
        font-size: 12pt;
        line-height: 1.4;
    }
}