/* ========================================
   Responsive Design (响应式设计)
   ======================================== */

/* 平板尺寸 */
@media (max-width: 1024px) {
    :root {
        --sidebar-width: 220px;
    }

    .sidebar {
        padding: 40px 20px;
    }

    .main-content {
        padding: 40px 25px;
    }

    .art-grid {
        grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
        gap: 25px;
    }

    .hero-title {
        font-size: 36px;
    }
}

/* 手机尺寸 */
@media (max-width: 768px) {
    .sidebar {
        display: none;
    }

    .mobile-header {
        display: flex;
    }

    .main-content {
        margin-left: 0;
        padding: 80px 16px 30px;
    }

    .hero-section {
        margin-bottom: 30px;
        padding: 20px 0;
    }

    .hero-title {
        font-size: 28px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section-title {
        font-size: 22px;
        margin-bottom: 20px;
    }

    .art-grid {
        grid-template-columns: repeat(auto-fill, minmax(100%, 1fr));
        gap: 20px;
    }

    .lightbox {
        padding: 20px;
    }

    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
        font-size: 20px;
    }

    .lightbox-close {
        top: 10px;
        right: 10px;
        width: 40px;
        height: 40px;
        font-size: 28px;
    }
}

/* 小屏手机 */
@media (max-width: 480px) {
    .main-content {
        padding: 80px 12px 20px;
    }

    .hero-title {
        font-size: 24px;
    }

    .art-grid {
        gap: 16px;
    }

    .art-title {
        font-size: 14px;
    }

    .art-description {
        font-size: 12px;
    }
}